fs/smb/server/smb2pdu.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   Copyright (C) 2016 Namjae Jeon <[email protected]>
   4  *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
   5  */
   6
   7 #include <linux/inetdevice.h>
   8 #include <net/addrconf.h>
   9 #include <linux/syscalls.h>
  10 #include <linux/namei.h>
  11 #include <linux/statfs.h>
  12 #include <linux/ethtool.h>
  13 #include <linux/falloc.h>
  14 #include <linux/mount.h>
  15 #include <linux/filelock.h>
  16
  17 #include "glob.h"
  18 #include "smbfsctl.h"
  19 #include "oplock.h"
  20 #include "smbacl.h"
  21
  22 #include "auth.h"
  23 #include "asn1.h"
  24 #include "connection.h"
  25 #include "transport_ipc.h"
  26 #include "transport_rdma.h"
  27 #include "vfs.h"
  28 #include "vfs_cache.h"
  29 #include "misc.h"
  30
  31 #include "server.h"
  32 #include "smb_common.h"
  33 #include "../common/smb2status.h"
  34 #include "ksmbd_work.h"
  35 #include "mgmt/user_config.h"
  36 #include "mgmt/share_config.h"
  37 #include "mgmt/tree_connect.h"
  38 #include "mgmt/user_session.h"
  39 #include "mgmt/ksmbd_ida.h"
  40 #include "ndr.h"
  41
  42 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
  43 {
  44         if (work->next_smb2_rcv_hdr_off) {
  45                 *req = ksmbd_req_buf_next(work);
  46                 *rsp = ksmbd_resp_buf_next(work);
  47         } else {
  48                 *req = smb2_get_msg(work->request_buf);
  49                 *rsp = smb2_get_msg(work->response_buf);
  50         }
  51 }
  52
  53 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
  54
  55 /**
  56  * check_session_id() - check for valid session id in smb header
  57  * @conn:       connection instance
  58  * @id:         session id from smb header
  59  *
  60  * Return:      1 if valid session id, otherwise 0
  61  */
  62 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
  63 {
  64         struct ksmbd_session *sess;
  65
  66         if (id == 0 || id == -1)
  67                 return false;
  68
  69         sess = ksmbd_session_lookup_all(conn, id);
  70         if (sess) {
  71                 ksmbd_user_session_put(sess);
  72                 return true;
  73         }
  74         pr_err("Invalid user session id: %llu\n", id);
  75         return false;
  76 }
  77
  78 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
  79 {
  80         return xa_load(&sess->ksmbd_chann_list, (long)conn);
  81 }
  82
  83 /**
  84  * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
  85  * @work:       smb work
  86  *
  87  * Return:      0 if there is a tree connection matched or these are
  88  *              skipable commands, otherwise error
  89  */
  90 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
  91 {
  92         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
  93         unsigned int cmd = le16_to_cpu(req_hdr->Command);
  94         unsigned int tree_id;
  95
  96         if (cmd == SMB2_TREE_CONNECT_HE ||
  97             cmd ==  SMB2_CANCEL_HE ||
  98             cmd ==  SMB2_LOGOFF_HE) {
  99                 ksmbd_debug(SMB, "skip to check tree connect request\n");
 100                 return 0;
 101         }
 102
 103         if (xa_empty(&work->sess->tree_conns)) {
 104                 ksmbd_debug(SMB, "NO tree connected\n");
 105                 return -ENOENT;
 106         }
 107
 108         tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
 109
 110         /*
 111          * If request is not the first in Compound request,
 112          * Just validate tree id in header with work->tcon->id.
 113          */
 114         if (work->next_smb2_rcv_hdr_off) {
 115                 if (!work->tcon) {
 116                         pr_err("The first operation in the compound does not have tcon\n");
 117                         return -EINVAL;
 118                 }
 119                 if (tree_id != UINT_MAX && work->tcon->id != tree_id) {
 120                         pr_err("tree id(%u) is different with id(%u) in first operation\n",
 121                                         tree_id, work->tcon->id);
 122                         return -EINVAL;
 123                 }
 124                 return 1;
 125         }
 126
 127         work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
 128         if (!work->tcon) {
 129                 pr_err("Invalid tid %d\n", tree_id);
 130                 return -ENOENT;
 131         }
 132
 133         return 1;
 134 }
 135
 136 /**
 137  * smb2_set_err_rsp() - set error response code on smb response
 138  * @work:       smb work containing response buffer
 139  */
 140 void smb2_set_err_rsp(struct ksmbd_work *work)
 141 {
 142         struct smb2_err_rsp *err_rsp;
 143
 144         if (work->next_smb2_rcv_hdr_off)
 145                 err_rsp = ksmbd_resp_buf_next(work);
 146         else
 147                 err_rsp = smb2_get_msg(work->response_buf);
 148
 149         if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
 150                 int err;
 151
 152                 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
 153                 err_rsp->ErrorContextCount = 0;
 154                 err_rsp->Reserved = 0;
 155                 err_rsp->ByteCount = 0;
 156                 err_rsp->ErrorData[0] = 0;
 157                 err = ksmbd_iov_pin_rsp(work, (void *)err_rsp,
 158                                         __SMB2_HEADER_STRUCTURE_SIZE +
 159                                                 SMB2_ERROR_STRUCTURE_SIZE2);
 160                 if (err)
 161                         work->send_no_response = 1;
 162         }
 163 }
 164
 165 /**
 166  * is_smb2_neg_cmd() - is it smb2 negotiation command
 167  * @work:       smb work containing smb header
 168  *
 169  * Return:      true if smb2 negotiation command, otherwise false
 170  */
 171 bool is_smb2_neg_cmd(struct ksmbd_work *work)
 172 {
 173         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 174
 175         /* is it SMB2 header ? */
 176         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 177                 return false;
 178
 179         /* make sure it is request not response message */
 180         if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
 181                 return false;
 182
 183         if (hdr->Command != SMB2_NEGOTIATE)
 184                 return false;
 185
 186         return true;
 187 }
 188
 189 /**
 190  * is_smb2_rsp() - is it smb2 response
 191  * @work:       smb work containing smb response buffer
 192  *
 193  * Return:      true if smb2 response, otherwise false
 194  */
 195 bool is_smb2_rsp(struct ksmbd_work *work)
 196 {
 197         struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
 198
 199         /* is it SMB2 header ? */
 200         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 201                 return false;
 202
 203         /* make sure it is response not request message */
 204         if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
 205                 return false;
 206
 207         return true;
 208 }
 209
 210 /**
 211  * get_smb2_cmd_val() - get smb command code from smb header
 212  * @work:       smb work containing smb request buffer
 213  *
 214  * Return:      smb2 request command value
 215  */
 216 u16 get_smb2_cmd_val(struct ksmbd_work *work)
 217 {
 218         struct smb2_hdr *rcv_hdr;
 219
 220         if (work->next_smb2_rcv_hdr_off)
 221                 rcv_hdr = ksmbd_req_buf_next(work);
 222         else
 223                 rcv_hdr = smb2_get_msg(work->request_buf);
 224         return le16_to_cpu(rcv_hdr->Command);
 225 }
 226
 227 /**
 228  * set_smb2_rsp_status() - set error response code on smb2 header
 229  * @work:       smb work containing response buffer
 230  * @err:        error response code
 231  */
 232 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
 233 {
 234         struct smb2_hdr *rsp_hdr;
 235
 236         rsp_hdr = smb2_get_msg(work->response_buf);
 237         rsp_hdr->Status = err;
 238
 239         work->iov_idx = 0;
 240         work->iov_cnt = 0;
 241         work->next_smb2_rcv_hdr_off = 0;
 242         smb2_set_err_rsp(work);
 243 }
 244
 245 /**
 246  * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
 247  * @work:       smb work containing smb request buffer
 248  *
 249  * smb2 negotiate response is sent in reply of smb1 negotiate command for
 250  * dialect auto-negotiation.
 251  */
 252 int init_smb2_neg_rsp(struct ksmbd_work *work)
 253 {
 254         struct smb2_hdr *rsp_hdr;
 255         struct smb2_negotiate_rsp *rsp;
 256         struct ksmbd_conn *conn = work->conn;
 257         int err;
 258
 259         rsp_hdr = smb2_get_msg(work->response_buf);
 260         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 261         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 262         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 263         rsp_hdr->CreditRequest = cpu_to_le16(2);
 264         rsp_hdr->Command = SMB2_NEGOTIATE;
 265         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 266         rsp_hdr->NextCommand = 0;
 267         rsp_hdr->MessageId = 0;
 268         rsp_hdr->Id.SyncId.ProcessId = 0;
 269         rsp_hdr->Id.SyncId.TreeId = 0;
 270         rsp_hdr->SessionId = 0;
 271         memset(rsp_hdr->Signature, 0, 16);
 272
 273         rsp = smb2_get_msg(work->response_buf);
 274
 275         WARN_ON(ksmbd_conn_good(conn));
 276
 277         rsp->StructureSize = cpu_to_le16(65);
 278         ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
 279         rsp->DialectRevision = cpu_to_le16(conn->dialect);
 280         /* Not setting conn guid rsp->ServerGUID, as it
 281          * not used by client for identifying connection
 282          */
 283         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
 284         /* Default Max Message Size till SMB2.0, 64K*/
 285         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
 286         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
 287         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
 288
 289         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
 290         rsp->ServerStartTime = 0;
 291
 292         rsp->SecurityBufferOffset = cpu_to_le16(128);
 293         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
 294         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
 295                 le16_to_cpu(rsp->SecurityBufferOffset));
 296         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
 297         if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
 298                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
 299         err = ksmbd_iov_pin_rsp(work, rsp,
 300                                 sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH);
 301         if (err)
 302                 return err;
 303         conn->use_spnego = true;
 304
 305         ksmbd_conn_set_need_negotiate(conn);
 306         return 0;
 307 }
 308
 309 /**
 310  * smb2_set_rsp_credits() - set number of credits in response buffer
 311  * @work:       smb work containing smb response buffer
 312  */
 313 int smb2_set_rsp_credits(struct ksmbd_work *work)
 314 {
 315         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
 316         struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
 317         struct ksmbd_conn *conn = work->conn;
 318         unsigned short credits_requested, aux_max;
 319         unsigned short credit_charge, credits_granted = 0;
 320
 321         if (work->send_no_response)
 322                 return 0;
 323
 324         hdr->CreditCharge = req_hdr->CreditCharge;
 325
 326         if (conn->total_credits > conn->vals->max_credits) {
 327                 hdr->CreditRequest = 0;
 328                 pr_err("Total credits overflow: %d\n", conn->total_credits);
 329                 return -EINVAL;
 330         }
 331
 332         credit_charge = max_t(unsigned short,
 333                               le16_to_cpu(req_hdr->CreditCharge), 1);
 334         if (credit_charge > conn->total_credits) {
 335                 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
 336                             credit_charge, conn->total_credits);
 337                 return -EINVAL;
 338         }
 339
 340         conn->total_credits -= credit_charge;
 341         conn->outstanding_credits -= credit_charge;
 342         credits_requested = max_t(unsigned short,
 343                                   le16_to_cpu(req_hdr->CreditRequest), 1);
 344
 345         /* according to smb2.credits smbtorture, Windows server
 346          * 2016 or later grant up to 8192 credits at once.
 347          *
 348          * TODO: Need to adjuct CreditRequest value according to
 349          * current cpu load
 350          */
 351         if (hdr->Command == SMB2_NEGOTIATE)
 352                 aux_max = 1;
 353         else
 354                 aux_max = conn->vals->max_credits - conn->total_credits;
 355         credits_granted = min_t(unsigned short, credits_requested, aux_max);
 356
 357         conn->total_credits += credits_granted;
 358         work->credits_granted += credits_granted;
 359
 360         if (!req_hdr->NextCommand) {
 361                 /* Update CreditRequest in last request */
 362                 hdr->CreditRequest = cpu_to_le16(work->credits_granted);
 363         }
 364         ksmbd_debug(SMB,
 365                     "credits: requested[%d] granted[%d] total_granted[%d]\n",
 366                     credits_requested, credits_granted,
 367                     conn->total_credits);
 368         return 0;
 369 }
 370
 371 /**
 372  * init_chained_smb2_rsp() - initialize smb2 chained response
 373  * @work:       smb work containing smb response buffer
 374  */
 375 static void init_chained_smb2_rsp(struct ksmbd_work *work)
 376 {
 377         struct smb2_hdr *req = ksmbd_req_buf_next(work);
 378         struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
 379         struct smb2_hdr *rsp_hdr;
 380         struct smb2_hdr *rcv_hdr;
 381         int next_hdr_offset = 0;
 382         int len, new_len;
 383
 384         /* Len of this response = updated RFC len - offset of previous cmd
 385          * in the compound rsp
 386          */
 387
 388         /* Storing the current local FID which may be needed by subsequent
 389          * command in the compound request
 390          */
 391         if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
 392                 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
 393                 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
 394                 work->compound_sid = le64_to_cpu(rsp->SessionId);
 395         }
 396
 397         len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
 398         next_hdr_offset = le32_to_cpu(req->NextCommand);
 399
 400         new_len = ALIGN(len, 8);
 401         work->iov[work->iov_idx].iov_len += (new_len - len);
 402         inc_rfc1001_len(work->response_buf, new_len - len);
 403         rsp->NextCommand = cpu_to_le32(new_len);
 404
 405         work->next_smb2_rcv_hdr_off += next_hdr_offset;
 406         work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
 407         work->next_smb2_rsp_hdr_off += new_len;
 408         ksmbd_debug(SMB,
 409                     "Compound req new_len = %d rcv off = %d rsp off = %d\n",
 410                     new_len, work->next_smb2_rcv_hdr_off,
 411                     work->next_smb2_rsp_hdr_off);
 412
 413         rsp_hdr = ksmbd_resp_buf_next(work);
 414         rcv_hdr = ksmbd_req_buf_next(work);
 415
 416         if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
 417                 ksmbd_debug(SMB, "related flag should be set\n");
 418                 work->compound_fid = KSMBD_NO_FID;
 419                 work->compound_pfid = KSMBD_NO_FID;
 420         }
 421         memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 422         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 423         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 424         rsp_hdr->Command = rcv_hdr->Command;
 425
 426         /*
 427          * Message is response. We don't grant oplock yet.
 428          */
 429         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
 430                                 SMB2_FLAGS_RELATED_OPERATIONS);
 431         rsp_hdr->NextCommand = 0;
 432         rsp_hdr->MessageId = rcv_hdr->MessageId;
 433         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 434         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 435         rsp_hdr->SessionId = rcv_hdr->SessionId;
 436         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 437 }
 438
 439 /**
 440  * is_chained_smb2_message() - check for chained command
 441  * @work:       smb work containing smb request buffer
 442  *
 443  * Return:      true if chained request, otherwise false
 444  */
 445 bool is_chained_smb2_message(struct ksmbd_work *work)
 446 {
 447         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 448         unsigned int len, next_cmd;
 449
 450         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 451                 return false;
 452
 453         hdr = ksmbd_req_buf_next(work);
 454         next_cmd = le32_to_cpu(hdr->NextCommand);
 455         if (next_cmd > 0) {
 456                 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
 457                         __SMB2_HEADER_STRUCTURE_SIZE >
 458                     get_rfc1002_len(work->request_buf)) {
 459                         pr_err("next command(%u) offset exceeds smb msg size\n",
 460                                next_cmd);
 461                         return false;
 462                 }
 463
 464                 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
 465                     work->response_sz) {
 466                         pr_err("next response offset exceeds response buffer size\n");
 467                         return false;
 468                 }
 469
 470                 ksmbd_debug(SMB, "got SMB2 chained command\n");
 471                 init_chained_smb2_rsp(work);
 472                 return true;
 473         } else if (work->next_smb2_rcv_hdr_off) {
 474                 /*
 475                  * This is last request in chained command,
 476                  * align response to 8 byte
 477                  */
 478                 len = ALIGN(get_rfc1002_len(work->response_buf), 8);
 479                 len = len - get_rfc1002_len(work->response_buf);
 480                 if (len) {
 481                         ksmbd_debug(SMB, "padding len %u\n", len);
 482                         work->iov[work->iov_idx].iov_len += len;
 483                         inc_rfc1001_len(work->response_buf, len);
 484                 }
 485                 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
 486         }
 487         return false;
 488 }
 489
 490 /**
 491  * init_smb2_rsp_hdr() - initialize smb2 response
 492  * @work:       smb work containing smb request buffer
 493  *
 494  * Return:      0
 495  */
 496 int init_smb2_rsp_hdr(struct ksmbd_work *work)
 497 {
 498         struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
 499         struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
 500
 501         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 502         rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
 503         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 504         rsp_hdr->Command = rcv_hdr->Command;
 505
 506         /*
 507          * Message is response. We don't grant oplock yet.
 508          */
 509         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 510         rsp_hdr->NextCommand = 0;
 511         rsp_hdr->MessageId = rcv_hdr->MessageId;
 512         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 513         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 514         rsp_hdr->SessionId = rcv_hdr->SessionId;
 515         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 516
 517         return 0;
 518 }
 519
 520 /**
 521  * smb2_allocate_rsp_buf() - allocate smb2 response buffer
 522  * @work:       smb work containing smb request buffer
 523  *
 524  * Return:      0 on success, otherwise error
 525  */
 526 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
 527 {
 528         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 529         size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
 530         size_t large_sz = small_sz + work->conn->vals->max_trans_size;
 531         size_t sz = small_sz;
 532         int cmd = le16_to_cpu(hdr->Command);
 533
 534         if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
 535                 sz = large_sz;
 536
 537         if (cmd == SMB2_QUERY_INFO_HE) {
 538                 struct smb2_query_info_req *req;
 539
 540                 if (get_rfc1002_len(work->request_buf) <
 541                     offsetof(struct smb2_query_info_req, OutputBufferLength))
 542                         return -EINVAL;
 543
 544                 req = smb2_get_msg(work->request_buf);
 545                 if ((req->InfoType == SMB2_O_INFO_FILE &&
 546                      (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
 547                      req->FileInfoClass == FILE_ALL_INFORMATION)) ||
 548                     req->InfoType == SMB2_O_INFO_SECURITY)
 549                         sz = large_sz;
 550         }
 551
 552         /* allocate large response buf for chained commands */
 553         if (le32_to_cpu(hdr->NextCommand) > 0)
 554                 sz = large_sz;
 555
 556         work->response_buf = kvzalloc(sz, KSMBD_DEFAULT_GFP);
 557         if (!work->response_buf)
 558                 return -ENOMEM;
 559
 560         work->response_sz = sz;
 561         return 0;
 562 }
 563
 564 /**
 565  * smb2_check_user_session() - check for valid session for a user
 566  * @work:       smb work containing smb request buffer
 567  *
 568  * Return:      0 on success, otherwise error
 569  */
 570 int smb2_check_user_session(struct ksmbd_work *work)
 571 {
 572         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
 573         struct ksmbd_conn *conn = work->conn;
 574         unsigned int cmd = le16_to_cpu(req_hdr->Command);
 575         unsigned long long sess_id;
 576
 577         /*
 578          * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
 579          * require a session id, so no need to validate user session's for
 580          * these commands.
 581          */
 582         if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
 583             cmd == SMB2_SESSION_SETUP_HE)
 584                 return 0;
 585
 586         if (!ksmbd_conn_good(conn))
 587                 return -EIO;
 588
 589         sess_id = le64_to_cpu(req_hdr->SessionId);
 590
 591         /*
 592          * If request is not the first in Compound request,
 593          * Just validate session id in header with work->sess->id.
 594          */
 595         if (work->next_smb2_rcv_hdr_off) {
 596                 if (!work->sess) {
 597                         pr_err("The first operation in the compound does not have sess\n");
 598                         return -EINVAL;
 599                 }
 600                 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) {
 601                         pr_err("session id(%llu) is different with the first operation(%lld)\n",
 602                                         sess_id, work->sess->id);
 603                         return -EINVAL;
 604                 }
 605                 return 1;
 606         }
 607
 608         /* Check for validity of user session */
 609         work->sess = ksmbd_session_lookup_all(conn, sess_id);
 610         if (work->sess)
 611                 return 1;
 612         ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
 613         return -ENOENT;
 614 }
 615
 616 /**
 617  * smb2_get_name() - get filename string from on the wire smb format
 618  * @src:        source buffer
 619  * @maxlen:     maxlen of source string
 620  * @local_nls:  nls_table pointer
 621  *
 622  * Return:      matching converted filename on success, otherwise error ptr
 623  */
 624 static char *
 625 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
 626 {
 627         char *name;
 628
 629         name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
 630         if (IS_ERR(name)) {
 631                 pr_err("failed to get name %ld\n", PTR_ERR(name));
 632                 return name;
 633         }
 634
 635         if (*name == '\\') {
 636                 pr_err("not allow directory name included leading slash\n");
 637                 kfree(name);
 638                 return ERR_PTR(-EINVAL);
 639         }
 640
 641         ksmbd_conv_path_to_unix(name);
 642         ksmbd_strip_last_slash(name);
 643         return name;
 644 }
 645
 646 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
 647 {
 648         struct ksmbd_conn *conn = work->conn;
 649         int id;
 650
 651         id = ksmbd_acquire_async_msg_id(&conn->async_ida);
 652         if (id < 0) {
 653                 pr_err("Failed to alloc async message id\n");
 654                 return id;
 655         }
 656         work->asynchronous = true;
 657         work->async_id = id;
 658
 659         ksmbd_debug(SMB,
 660                     "Send interim Response to inform async request id : %d\n",
 661                     work->async_id);
 662
 663         work->cancel_fn = fn;
 664         work->cancel_argv = arg;
 665
 666         if (list_empty(&work->async_request_entry)) {
 667                 spin_lock(&conn->request_lock);
 668                 list_add_tail(&work->async_request_entry, &conn->async_requests);
 669                 spin_unlock(&conn->request_lock);
 670         }
 671
 672         return 0;
 673 }
 674
 675 void release_async_work(struct ksmbd_work *work)
 676 {
 677         struct ksmbd_conn *conn = work->conn;
 678
 679         spin_lock(&conn->request_lock);
 680         list_del_init(&work->async_request_entry);
 681         spin_unlock(&conn->request_lock);
 682
 683         work->asynchronous = 0;
 684         work->cancel_fn = NULL;
 685         kfree(work->cancel_argv);
 686         work->cancel_argv = NULL;
 687         if (work->async_id) {
 688                 ksmbd_release_id(&conn->async_ida, work->async_id);
 689                 work->async_id = 0;
 690         }
 691 }
 692
 693 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
 694 {
 695         struct smb2_hdr *rsp_hdr;
 696         struct ksmbd_work *in_work = ksmbd_alloc_work_struct();
 697
 698         if (allocate_interim_rsp_buf(in_work)) {
 699                 pr_err("smb_allocate_rsp_buf failed!\n");
 700                 ksmbd_free_work_struct(in_work);
 701                 return;
 702         }
 703
 704         in_work->conn = work->conn;
 705         memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work),
 706                __SMB2_HEADER_STRUCTURE_SIZE);
 707
 708         rsp_hdr = smb2_get_msg(in_work->response_buf);
 709         rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
 710         rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id);
 711         smb2_set_err_rsp(in_work);
 712         rsp_hdr->Status = status;
 713
 714         ksmbd_conn_write(in_work);
 715         ksmbd_free_work_struct(in_work);
 716 }
 717
 718 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
 719 {
 720         if (S_ISDIR(mode) || S_ISREG(mode))
 721                 return 0;
 722
 723         if (S_ISLNK(mode))
 724                 return IO_REPARSE_TAG_LX_SYMLINK_LE;
 725         else if (S_ISFIFO(mode))
 726                 return IO_REPARSE_TAG_LX_FIFO_LE;
 727         else if (S_ISSOCK(mode))
 728                 return IO_REPARSE_TAG_AF_UNIX_LE;
 729         else if (S_ISCHR(mode))
 730                 return IO_REPARSE_TAG_LX_CHR_LE;
 731         else if (S_ISBLK(mode))
 732                 return IO_REPARSE_TAG_LX_BLK_LE;
 733
 734         return 0;
 735 }
 736
 737 /**
 738  * smb2_get_dos_mode() - get file mode in dos format from unix mode
 739  * @stat:       kstat containing file mode
 740  * @attribute:  attribute flags
 741  *
 742  * Return:      converted dos mode
 743  */
 744 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
 745 {
 746         int attr = 0;
 747
 748         if (S_ISDIR(stat->mode)) {
 749                 attr = FILE_ATTRIBUTE_DIRECTORY |
 750                         (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
 751         } else {
 752                 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
 753                 attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
 754                 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
 755                                 FILE_SUPPORTS_SPARSE_FILES))
 756                         attr |= FILE_ATTRIBUTE_SPARSE_FILE;
 757
 758                 if (smb2_get_reparse_tag_special_file(stat->mode))
 759                         attr |= FILE_ATTRIBUTE_REPARSE_POINT;
 760         }
 761
 762         return attr;
 763 }
 764
 765 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
 766                                __le16 hash_id)
 767 {
 768         pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
 769         pneg_ctxt->DataLength = cpu_to_le16(38);
 770         pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
 771         pneg_ctxt->Reserved = cpu_to_le32(0);
 772         pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
 773         get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
 774         pneg_ctxt->HashAlgorithms = hash_id;
 775 }
 776
 777 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
 778                                __le16 cipher_type)
 779 {
 780         pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
 781         pneg_ctxt->DataLength = cpu_to_le16(4);
 782         pneg_ctxt->Reserved = cpu_to_le32(0);
 783         pneg_ctxt->CipherCount = cpu_to_le16(1);
 784         pneg_ctxt->Ciphers[0] = cipher_type;
 785 }
 786
 787 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
 788                                 __le16 sign_algo)
 789 {
 790         pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
 791         pneg_ctxt->DataLength =
 792                 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
 793                         - sizeof(struct smb2_neg_context));
 794         pneg_ctxt->Reserved = cpu_to_le32(0);
 795         pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
 796         pneg_ctxt->SigningAlgorithms[0] = sign_algo;
 797 }
 798
 799 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
 800 {
 801         pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
 802         pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
 803         /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
 804         pneg_ctxt->Name[0] = 0x93;
 805         pneg_ctxt->Name[1] = 0xAD;
 806         pneg_ctxt->Name[2] = 0x25;
 807         pneg_ctxt->Name[3] = 0x50;
 808         pneg_ctxt->Name[4] = 0x9C;
 809         pneg_ctxt->Name[5] = 0xB4;
 810         pneg_ctxt->Name[6] = 0x11;
 811         pneg_ctxt->Name[7] = 0xE7;
 812         pneg_ctxt->Name[8] = 0xB4;
 813         pneg_ctxt->Name[9] = 0x23;
 814         pneg_ctxt->Name[10] = 0x83;
 815         pneg_ctxt->Name[11] = 0xDE;
 816         pneg_ctxt->Name[12] = 0x96;
 817         pneg_ctxt->Name[13] = 0x8B;
 818         pneg_ctxt->Name[14] = 0xCD;
 819         pneg_ctxt->Name[15] = 0x7C;
 820 }
 821
 822 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn,
 823                                   struct smb2_negotiate_rsp *rsp)
 824 {
 825         char * const pneg_ctxt = (char *)rsp +
 826                         le32_to_cpu(rsp->NegotiateContextOffset);
 827         int neg_ctxt_cnt = 1;
 828         int ctxt_size;
 829
 830         ksmbd_debug(SMB,
 831                     "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
 832         build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
 833                            conn->preauth_info->Preauth_HashId);
 834         ctxt_size = sizeof(struct smb2_preauth_neg_context);
 835
 836         if (conn->cipher_type) {
 837                 /* Round to 8 byte boundary */
 838                 ctxt_size = round_up(ctxt_size, 8);
 839                 ksmbd_debug(SMB,
 840                             "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
 841                 build_encrypt_ctxt((struct smb2_encryption_neg_context *)
 842                                    (pneg_ctxt + ctxt_size),
 843                                    conn->cipher_type);
 844                 neg_ctxt_cnt++;
 845                 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
 846         }
 847
 848         /* compression context not yet supported */
 849         WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE);
 850
 851         if (conn->posix_ext_supported) {
 852                 ctxt_size = round_up(ctxt_size, 8);
 853                 ksmbd_debug(SMB,
 854                             "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
 855                 build_posix_ctxt((struct smb2_posix_neg_context *)
 856                                  (pneg_ctxt + ctxt_size));
 857                 neg_ctxt_cnt++;
 858                 ctxt_size += sizeof(struct smb2_posix_neg_context);
 859         }
 860
 861         if (conn->signing_negotiated) {
 862                 ctxt_size = round_up(ctxt_size, 8);
 863                 ksmbd_debug(SMB,
 864                             "assemble SMB2_SIGNING_CAPABILITIES context\n");
 865                 build_sign_cap_ctxt((struct smb2_signing_capabilities *)
 866                                     (pneg_ctxt + ctxt_size),
 867                                     conn->signing_algorithm);
 868                 neg_ctxt_cnt++;
 869                 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
 870         }
 871
 872         rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
 873         return ctxt_size + AUTH_GSS_PADDING;
 874 }
 875
 876 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
 877                                   struct smb2_preauth_neg_context *pneg_ctxt,
 878                                   int ctxt_len)
 879 {
 880         /*
 881          * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,
 882          * which may not be present. Only check for used HashAlgorithms[1].
 883          */
 884         if (ctxt_len <
 885             sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)
 886                 return STATUS_INVALID_PARAMETER;
 887
 888         if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
 889                 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
 890
 891         conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;
 892         return STATUS_SUCCESS;
 893 }
 894
 895 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
 896                                 struct smb2_encryption_neg_context *pneg_ctxt,
 897                                 int ctxt_len)
 898 {
 899         int cph_cnt;
 900         int i, cphs_size;
 901
 902         if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {
 903                 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");
 904                 return;
 905         }
 906
 907         conn->cipher_type = 0;
 908
 909         cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
 910         cphs_size = cph_cnt * sizeof(__le16);
 911
 912         if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
 913             ctxt_len) {
 914                 pr_err("Invalid cipher count(%d)\n", cph_cnt);
 915                 return;
 916         }
 917
 918         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
 919                 return;
 920
 921         for (i = 0; i < cph_cnt; i++) {
 922                 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
 923                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
 924                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
 925                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
 926                         ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
 927                                     pneg_ctxt->Ciphers[i]);
 928                         conn->cipher_type = pneg_ctxt->Ciphers[i];
 929                         break;
 930                 }
 931         }
 932 }
 933
 934 /**
 935  * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
 936  * @conn:       smb connection
 937  *
 938  * Return:      true if connection should be encrypted, else false
 939  */
 940 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
 941 {
 942         if (!conn->ops->generate_encryptionkey)
 943                 return false;
 944
 945         /*
 946          * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
 947          * SMB 3.1.1 uses the cipher_type field.
 948          */
 949         return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
 950             conn->cipher_type;
 951 }
 952
 953 static void decode_compress_ctxt(struct ksmbd_conn *conn,
 954                                  struct smb2_compression_capabilities_context *pneg_ctxt)
 955 {
 956         conn->compress_algorithm = SMB3_COMPRESS_NONE;
 957 }
 958
 959 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
 960                                  struct smb2_signing_capabilities *pneg_ctxt,
 961                                  int ctxt_len)
 962 {
 963         int sign_algo_cnt;
 964         int i, sign_alos_size;
 965
 966         if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {
 967                 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");
 968                 return;
 969         }
 970
 971         conn->signing_negotiated = false;
 972         sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
 973         sign_alos_size = sign_algo_cnt * sizeof(__le16);
 974
 975         if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
 976             ctxt_len) {
 977                 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
 978                 return;
 979         }
 980
 981         for (i = 0; i < sign_algo_cnt; i++) {
 982                 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
 983                     pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
 984                         ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
 985                                     pneg_ctxt->SigningAlgorithms[i]);
 986                         conn->signing_negotiated = true;
 987                         conn->signing_algorithm =
 988                                 pneg_ctxt->SigningAlgorithms[i];
 989                         break;
 990                 }
 991         }
 992 }
 993
 994 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
 995                                       struct smb2_negotiate_req *req,
 996                                       unsigned int len_of_smb)
 997 {
 998         /* +4 is to account for the RFC1001 len field */
 999         struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
1000         int i = 0, len_of_ctxts;
1001         unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);
1002         unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
1003         __le32 status = STATUS_INVALID_PARAMETER;
1004
1005         ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
1006         if (len_of_smb <= offset) {
1007                 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
1008                 return status;
1009         }
1010
1011         len_of_ctxts = len_of_smb - offset;
1012
1013         while (i++ < neg_ctxt_cnt) {
1014                 int clen, ctxt_len;
1015
1016                 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))
1017                         break;
1018
1019                 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1020                 clen = le16_to_cpu(pctx->DataLength);
1021                 ctxt_len = clen + sizeof(struct smb2_neg_context);
1022
1023                 if (ctxt_len > len_of_ctxts)
1024                         break;
1025
1026                 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1027                         ksmbd_debug(SMB,
1028                                     "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1029                         if (conn->preauth_info->Preauth_HashId)
1030                                 break;
1031
1032                         status = decode_preauth_ctxt(conn,
1033                                                      (struct smb2_preauth_neg_context *)pctx,
1034                                                      ctxt_len);
1035                         if (status != STATUS_SUCCESS)
1036                                 break;
1037                 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1038                         ksmbd_debug(SMB,
1039                                     "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1040                         if (conn->cipher_type)
1041                                 break;
1042
1043                         decode_encrypt_ctxt(conn,
1044                                             (struct smb2_encryption_neg_context *)pctx,
1045                                             ctxt_len);
1046                 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1047                         ksmbd_debug(SMB,
1048                                     "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1049                         if (conn->compress_algorithm)
1050                                 break;
1051
1052                         decode_compress_ctxt(conn,
1053                                              (struct smb2_compression_capabilities_context *)pctx);
1054                 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1055                         ksmbd_debug(SMB,
1056                                     "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1057                 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1058                         ksmbd_debug(SMB,
1059                                     "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1060                         conn->posix_ext_supported = true;
1061                 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1062                         ksmbd_debug(SMB,
1063                                     "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1064
1065                         decode_sign_cap_ctxt(conn,
1066                                              (struct smb2_signing_capabilities *)pctx,
1067                                              ctxt_len);
1068                 }
1069
1070                 /* offsets must be 8 byte aligned */
1071                 offset = (ctxt_len + 7) & ~0x7;
1072                 len_of_ctxts -= offset;
1073         }
1074         return status;
1075 }
1076
1077 /**
1078  * smb2_handle_negotiate() - handler for smb2 negotiate command
1079  * @work:       smb work containing smb request buffer
1080  *
1081  * Return:      0
1082  */
1083 int smb2_handle_negotiate(struct ksmbd_work *work)
1084 {
1085         struct ksmbd_conn *conn = work->conn;
1086         struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1087         struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1088         int rc = 0;
1089         unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0;
1090         __le32 status;
1091
1092         ksmbd_debug(SMB, "Received negotiate request\n");
1093         conn->need_neg = false;
1094         if (ksmbd_conn_good(conn)) {
1095                 pr_err("conn->tcp_status is already in CifsGood State\n");
1096                 work->send_no_response = 1;
1097                 return rc;
1098         }
1099
1100         ksmbd_conn_lock(conn);
1101         smb2_buf_len = get_rfc1002_len(work->request_buf);
1102         smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1103         if (smb2_neg_size > smb2_buf_len) {
1104                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1105                 rc = -EINVAL;
1106                 goto err_out;
1107         }
1108
1109         if (req->DialectCount == 0) {
1110                 pr_err("malformed packet\n");
1111                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1112                 rc = -EINVAL;
1113                 goto err_out;
1114         }
1115
1116         if (conn->dialect == SMB311_PROT_ID) {
1117                 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1118
1119                 if (smb2_buf_len < nego_ctxt_off) {
1120                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1121                         rc = -EINVAL;
1122                         goto err_out;
1123                 }
1124
1125                 if (smb2_neg_size > nego_ctxt_off) {
1126                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1127                         rc = -EINVAL;
1128                         goto err_out;
1129                 }
1130
1131                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1132                     nego_ctxt_off) {
1133                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1134                         rc = -EINVAL;
1135                         goto err_out;
1136                 }
1137         } else {
1138                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1139                     smb2_buf_len) {
1140                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1141                         rc = -EINVAL;
1142                         goto err_out;
1143                 }
1144         }
1145
1146         conn->cli_cap = le32_to_cpu(req->Capabilities);
1147         switch (conn->dialect) {
1148         case SMB311_PROT_ID:
1149                 conn->preauth_info =
1150                         kzalloc(sizeof(struct preauth_integrity_info),
1151                                 KSMBD_DEFAULT_GFP);
1152                 if (!conn->preauth_info) {
1153                         rc = -ENOMEM;
1154                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1155                         goto err_out;
1156                 }
1157
1158                 status = deassemble_neg_contexts(conn, req,
1159                                                  get_rfc1002_len(work->request_buf));
1160                 if (status != STATUS_SUCCESS) {
1161                         pr_err("deassemble_neg_contexts error(0x%x)\n",
1162                                status);
1163                         rsp->hdr.Status = status;
1164                         rc = -EINVAL;
1165                         kfree(conn->preauth_info);
1166                         conn->preauth_info = NULL;
1167                         goto err_out;
1168                 }
1169
1170                 rc = init_smb3_11_server(conn);
1171                 if (rc < 0) {
1172                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1173                         kfree(conn->preauth_info);
1174                         conn->preauth_info = NULL;
1175                         goto err_out;
1176                 }
1177
1178                 ksmbd_gen_preauth_integrity_hash(conn,
1179                                                  work->request_buf,
1180                                                  conn->preauth_info->Preauth_HashValue);
1181                 rsp->NegotiateContextOffset =
1182                                 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1183                 neg_ctxt_len = assemble_neg_contexts(conn, rsp);
1184                 break;
1185         case SMB302_PROT_ID:
1186                 init_smb3_02_server(conn);
1187                 break;
1188         case SMB30_PROT_ID:
1189                 init_smb3_0_server(conn);
1190                 break;
1191         case SMB21_PROT_ID:
1192                 init_smb2_1_server(conn);
1193                 break;
1194         case SMB2X_PROT_ID:
1195         case BAD_PROT_ID:
1196         default:
1197                 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1198                             conn->dialect);
1199                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1200                 rc = -EINVAL;
1201                 goto err_out;
1202         }
1203         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1204
1205         /* For stats */
1206         conn->connection_type = conn->dialect;
1207
1208         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1209         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1210         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1211
1212         memcpy(conn->ClientGUID, req->ClientGUID,
1213                         SMB2_CLIENT_GUID_SIZE);
1214         conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1215
1216         rsp->StructureSize = cpu_to_le16(65);
1217         rsp->DialectRevision = cpu_to_le16(conn->dialect);
1218         /* Not setting conn guid rsp->ServerGUID, as it
1219          * not used by client for identifying server
1220          */
1221         memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1222
1223         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1224         rsp->ServerStartTime = 0;
1225         ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1226                     le32_to_cpu(rsp->NegotiateContextOffset),
1227                     le16_to_cpu(rsp->NegotiateContextCount));
1228
1229         rsp->SecurityBufferOffset = cpu_to_le16(128);
1230         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1231         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1232                                   le16_to_cpu(rsp->SecurityBufferOffset));
1233
1234         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1235         conn->use_spnego = true;
1236
1237         if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1238              server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1239             req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1240                 conn->sign = true;
1241         else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1242                 server_conf.enforced_signing = true;
1243                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1244                 conn->sign = true;
1245         }
1246
1247         conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1248         ksmbd_conn_set_need_negotiate(conn);
1249
1250 err_out:
1251         ksmbd_conn_unlock(conn);
1252         if (rc)
1253                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1254
1255         if (!rc)
1256                 rc = ksmbd_iov_pin_rsp(work, rsp,
1257                                        sizeof(struct smb2_negotiate_rsp) +
1258                                         AUTH_GSS_LENGTH + neg_ctxt_len);
1259         if (rc < 0)
1260                 smb2_set_err_rsp(work);
1261         return rc;
1262 }
1263
1264 static int alloc_preauth_hash(struct ksmbd_session *sess,
1265                               struct ksmbd_conn *conn)
1266 {
1267         if (sess->Preauth_HashValue)
1268                 return 0;
1269
1270         sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1271                                           PREAUTH_HASHVALUE_SIZE, KSMBD_DEFAULT_GFP);
1272         if (!sess->Preauth_HashValue)
1273                 return -ENOMEM;
1274
1275         return 0;
1276 }
1277
1278 static int generate_preauth_hash(struct ksmbd_work *work)
1279 {
1280         struct ksmbd_conn *conn = work->conn;
1281         struct ksmbd_session *sess = work->sess;
1282         u8 *preauth_hash;
1283
1284         if (conn->dialect != SMB311_PROT_ID)
1285                 return 0;
1286
1287         if (conn->binding) {
1288                 struct preauth_session *preauth_sess;
1289
1290                 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1291                 if (!preauth_sess) {
1292                         preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1293                         if (!preauth_sess)
1294                                 return -ENOMEM;
1295                 }
1296
1297                 preauth_hash = preauth_sess->Preauth_HashValue;
1298         } else {
1299                 if (!sess->Preauth_HashValue)
1300                         if (alloc_preauth_hash(sess, conn))
1301                                 return -ENOMEM;
1302                 preauth_hash = sess->Preauth_HashValue;
1303         }
1304
1305         ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1306         return 0;
1307 }
1308
1309 static int decode_negotiation_token(struct ksmbd_conn *conn,
1310                                     struct negotiate_message *negblob,
1311                                     size_t sz)
1312 {
1313         if (!conn->use_spnego)
1314                 return -EINVAL;
1315
1316         if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1317                 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1318                         conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1319                         conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1320                         conn->use_spnego = false;
1321                 }
1322         }
1323         return 0;
1324 }
1325
1326 static int ntlm_negotiate(struct ksmbd_work *work,
1327                           struct negotiate_message *negblob,
1328                           size_t negblob_len, struct smb2_sess_setup_rsp *rsp)
1329 {
1330         struct challenge_message *chgblob;
1331         unsigned char *spnego_blob = NULL;
1332         u16 spnego_blob_len;
1333         char *neg_blob;
1334         int sz, rc;
1335
1336         ksmbd_debug(SMB, "negotiate phase\n");
1337         rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1338         if (rc)
1339                 return rc;
1340
1341         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1342         chgblob = (struct challenge_message *)rsp->Buffer;
1343         memset(chgblob, 0, sizeof(struct challenge_message));
1344
1345         if (!work->conn->use_spnego) {
1346                 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1347                 if (sz < 0)
1348                         return -ENOMEM;
1349
1350                 rsp->SecurityBufferLength = cpu_to_le16(sz);
1351                 return 0;
1352         }
1353
1354         sz = sizeof(struct challenge_message);
1355         sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1356
1357         neg_blob = kzalloc(sz, KSMBD_DEFAULT_GFP);
1358         if (!neg_blob)
1359                 return -ENOMEM;
1360
1361         chgblob = (struct challenge_message *)neg_blob;
1362         sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1363         if (sz < 0) {
1364                 rc = -ENOMEM;
1365                 goto out;
1366         }
1367
1368         rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1369                                            neg_blob, sz);
1370         if (rc) {
1371                 rc = -ENOMEM;
1372                 goto out;
1373         }
1374
1375         memcpy(rsp->Buffer, spnego_blob, spnego_blob_len);
1376         rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1377
1378 out:
1379         kfree(spnego_blob);
1380         kfree(neg_blob);
1381         return rc;
1382 }
1383
1384 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1385                                                   struct smb2_sess_setup_req *req)
1386 {
1387         int sz;
1388
1389         if (conn->use_spnego && conn->mechToken)
1390                 return (struct authenticate_message *)conn->mechToken;
1391
1392         sz = le16_to_cpu(req->SecurityBufferOffset);
1393         return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1394                                                + sz);
1395 }
1396
1397 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1398                                        struct smb2_sess_setup_req *req)
1399 {
1400         struct authenticate_message *authblob;
1401         struct ksmbd_user *user;
1402         char *name;
1403         unsigned int name_off, name_len, secbuf_len;
1404
1405         if (conn->use_spnego && conn->mechToken)
1406                 secbuf_len = conn->mechTokenLen;
1407         else
1408                 secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1409         if (secbuf_len < sizeof(struct authenticate_message)) {
1410                 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1411                 return NULL;
1412         }
1413         authblob = user_authblob(conn, req);
1414         name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1415         name_len = le16_to_cpu(authblob->UserName.Length);
1416
1417         if (secbuf_len < (u64)name_off + name_len)
1418                 return NULL;
1419
1420         name = smb_strndup_from_utf16((const char *)authblob + name_off,
1421                                       name_len,
1422                                       true,
1423                                       conn->local_nls);
1424         if (IS_ERR(name)) {
1425                 pr_err("cannot allocate memory\n");
1426                 return NULL;
1427         }
1428
1429         ksmbd_debug(SMB, "session setup request for user %s\n", name);
1430         user = ksmbd_login_user(name);
1431         kfree(name);
1432         return user;
1433 }
1434
1435 static int ntlm_authenticate(struct ksmbd_work *work,
1436                              struct smb2_sess_setup_req *req,
1437                              struct smb2_sess_setup_rsp *rsp)
1438 {
1439         struct ksmbd_conn *conn = work->conn;
1440         struct ksmbd_session *sess = work->sess;
1441         struct channel *chann = NULL;
1442         struct ksmbd_user *user;
1443         u64 prev_id;
1444         int sz, rc;
1445
1446         ksmbd_debug(SMB, "authenticate phase\n");
1447         if (conn->use_spnego) {
1448                 unsigned char *spnego_blob;
1449                 u16 spnego_blob_len;
1450
1451                 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1452                                                     &spnego_blob_len,
1453                                                     0);
1454                 if (rc)
1455                         return -ENOMEM;
1456
1457                 memcpy(rsp->Buffer, spnego_blob, spnego_blob_len);
1458                 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1459                 kfree(spnego_blob);
1460         }
1461
1462         user = session_user(conn, req);
1463         if (!user) {
1464                 ksmbd_debug(SMB, "Unknown user name or an error\n");
1465                 return -EPERM;
1466         }
1467
1468         /* Check for previous session */
1469         prev_id = le64_to_cpu(req->PreviousSessionId);
1470         if (prev_id && prev_id != sess->id)
1471                 destroy_previous_session(conn, user, prev_id);
1472
1473         if (sess->state == SMB2_SESSION_VALID) {
1474                 /*
1475                  * Reuse session if anonymous try to connect
1476                  * on reauthetication.
1477                  */
1478                 if (conn->binding == false && ksmbd_anonymous_user(user)) {
1479                         ksmbd_free_user(user);
1480                         return 0;
1481                 }
1482
1483                 if (!ksmbd_compare_user(sess->user, user)) {
1484                         ksmbd_free_user(user);
1485                         return -EPERM;
1486                 }
1487                 ksmbd_free_user(user);
1488         } else {
1489                 sess->user = user;
1490         }
1491
1492         if (conn->binding == false && user_guest(sess->user)) {
1493                 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1494         } else {
1495                 struct authenticate_message *authblob;
1496
1497                 authblob = user_authblob(conn, req);
1498                 if (conn->use_spnego && conn->mechToken)
1499                         sz = conn->mechTokenLen;
1500                 else
1501                         sz = le16_to_cpu(req->SecurityBufferLength);
1502                 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1503                 if (rc) {
1504                         set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1505                         ksmbd_debug(SMB, "authentication failed\n");
1506                         return -EPERM;
1507                 }
1508         }
1509
1510         /*
1511          * If session state is SMB2_SESSION_VALID, We can assume
1512          * that it is reauthentication. And the user/password
1513          * has been verified, so return it here.
1514          */
1515         if (sess->state == SMB2_SESSION_VALID) {
1516                 if (conn->binding)
1517                         goto binding_session;
1518                 return 0;
1519         }
1520
1521         if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1522              (conn->sign || server_conf.enforced_signing)) ||
1523             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1524                 sess->sign = true;
1525
1526         if (smb3_encryption_negotiated(conn) &&
1527                         !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1528                 rc = conn->ops->generate_encryptionkey(conn, sess);
1529                 if (rc) {
1530                         ksmbd_debug(SMB,
1531                                         "SMB3 encryption key generation failed\n");
1532                         return -EINVAL;
1533                 }
1534                 sess->enc = true;
1535                 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1536                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1537                 /*
1538                  * signing is disable if encryption is enable
1539                  * on this session
1540                  */
1541                 sess->sign = false;
1542         }
1543
1544 binding_session:
1545         if (conn->dialect >= SMB30_PROT_ID) {
1546                 chann = lookup_chann_list(sess, conn);
1547                 if (!chann) {
1548                         chann = kmalloc(sizeof(struct channel), KSMBD_DEFAULT_GFP);
1549                         if (!chann)
1550                                 return -ENOMEM;
1551
1552                         chann->conn = conn;
1553                         xa_store(&sess->ksmbd_chann_list, (long)conn, chann, KSMBD_DEFAULT_GFP);
1554                 }
1555         }
1556
1557         if (conn->ops->generate_signingkey) {
1558                 rc = conn->ops->generate_signingkey(sess, conn);
1559                 if (rc) {
1560                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1561                         return -EINVAL;
1562                 }
1563         }
1564
1565         if (!ksmbd_conn_lookup_dialect(conn)) {
1566                 pr_err("fail to verify the dialect\n");
1567                 return -ENOENT;
1568         }
1569         return 0;
1570 }
1571
1572 #ifdef CONFIG_SMB_SERVER_KERBEROS5
1573 static int krb5_authenticate(struct ksmbd_work *work,
1574                              struct smb2_sess_setup_req *req,
1575                              struct smb2_sess_setup_rsp *rsp)
1576 {
1577         struct ksmbd_conn *conn = work->conn;
1578         struct ksmbd_session *sess = work->sess;
1579         char *in_blob, *out_blob;
1580         struct channel *chann = NULL;
1581         u64 prev_sess_id;
1582         int in_len, out_len;
1583         int retval;
1584
1585         in_blob = (char *)&req->hdr.ProtocolId +
1586                 le16_to_cpu(req->SecurityBufferOffset);
1587         in_len = le16_to_cpu(req->SecurityBufferLength);
1588         out_blob = (char *)&rsp->hdr.ProtocolId +
1589                 le16_to_cpu(rsp->SecurityBufferOffset);
1590         out_len = work->response_sz -
1591                 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1592
1593         /* Check previous session */
1594         prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1595         if (prev_sess_id && prev_sess_id != sess->id)
1596                 destroy_previous_session(conn, sess->user, prev_sess_id);
1597
1598         if (sess->state == SMB2_SESSION_VALID)
1599                 ksmbd_free_user(sess->user);
1600
1601         retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1602                                          out_blob, &out_len);
1603         if (retval) {
1604                 ksmbd_debug(SMB, "krb5 authentication failed\n");
1605                 return -EINVAL;
1606         }
1607         rsp->SecurityBufferLength = cpu_to_le16(out_len);
1608
1609         if ((conn->sign || server_conf.enforced_signing) ||
1610             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1611                 sess->sign = true;
1612
1613         if (smb3_encryption_negotiated(conn)) {
1614                 retval = conn->ops->generate_encryptionkey(conn, sess);
1615                 if (retval) {
1616                         ksmbd_debug(SMB,
1617                                     "SMB3 encryption key generation failed\n");
1618                         return -EINVAL;
1619                 }
1620                 sess->enc = true;
1621                 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1622                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1623                 sess->sign = false;
1624         }
1625
1626         if (conn->dialect >= SMB30_PROT_ID) {
1627                 chann = lookup_chann_list(sess, conn);
1628                 if (!chann) {
1629                         chann = kmalloc(sizeof(struct channel), KSMBD_DEFAULT_GFP);
1630                         if (!chann)
1631                                 return -ENOMEM;
1632
1633                         chann->conn = conn;
1634                         xa_store(&sess->ksmbd_chann_list, (long)conn, chann, KSMBD_DEFAULT_GFP);
1635                 }
1636         }
1637
1638         if (conn->ops->generate_signingkey) {
1639                 retval = conn->ops->generate_signingkey(sess, conn);
1640                 if (retval) {
1641                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1642                         return -EINVAL;
1643                 }
1644         }
1645
1646         if (!ksmbd_conn_lookup_dialect(conn)) {
1647                 pr_err("fail to verify the dialect\n");
1648                 return -ENOENT;
1649         }
1650         return 0;
1651 }
1652 #else
1653 static int krb5_authenticate(struct ksmbd_work *work,
1654                              struct smb2_sess_setup_req *req,
1655                              struct smb2_sess_setup_rsp *rsp)
1656 {
1657         return -EOPNOTSUPP;
1658 }
1659 #endif
1660
1661 int smb2_sess_setup(struct ksmbd_work *work)
1662 {
1663         struct ksmbd_conn *conn = work->conn;
1664         struct smb2_sess_setup_req *req;
1665         struct smb2_sess_setup_rsp *rsp;
1666         struct ksmbd_session *sess;
1667         struct negotiate_message *negblob;
1668         unsigned int negblob_len, negblob_off;
1669         int rc = 0;
1670
1671         ksmbd_debug(SMB, "Received smb2 session setup request\n");
1672
1673         WORK_BUFFERS(work, req, rsp);
1674
1675         rsp->StructureSize = cpu_to_le16(9);
1676         rsp->SessionFlags = 0;
1677         rsp->SecurityBufferOffset = cpu_to_le16(72);
1678         rsp->SecurityBufferLength = 0;
1679
1680         ksmbd_conn_lock(conn);
1681         if (!req->hdr.SessionId) {
1682                 sess = ksmbd_smb2_session_create();
1683                 if (!sess) {
1684                         rc = -ENOMEM;
1685                         goto out_err;
1686                 }
1687                 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1688                 rc = ksmbd_session_register(conn, sess);
1689                 if (rc)
1690                         goto out_err;
1691
1692                 conn->binding = false;
1693         } else if (conn->dialect >= SMB30_PROT_ID &&
1694                    (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1695                    req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1696                 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1697
1698                 sess = ksmbd_session_lookup_slowpath(sess_id);
1699                 if (!sess) {
1700                         rc = -ENOENT;
1701                         goto out_err;
1702                 }
1703
1704                 if (conn->dialect != sess->dialect) {
1705                         rc = -EINVAL;
1706                         ksmbd_user_session_put(sess);
1707                         goto out_err;
1708                 }
1709
1710                 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1711                         rc = -EINVAL;
1712                         ksmbd_user_session_put(sess);
1713                         goto out_err;
1714                 }
1715
1716                 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1717                             SMB2_CLIENT_GUID_SIZE)) {
1718                         rc = -ENOENT;
1719                         ksmbd_user_session_put(sess);
1720                         goto out_err;
1721                 }
1722
1723                 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1724                         rc = -EACCES;
1725                         ksmbd_user_session_put(sess);
1726                         goto out_err;
1727                 }
1728
1729                 if (sess->state == SMB2_SESSION_EXPIRED) {
1730                         rc = -EFAULT;
1731                         ksmbd_user_session_put(sess);
1732                         goto out_err;
1733                 }
1734                 ksmbd_user_session_put(sess);
1735
1736                 if (ksmbd_conn_need_reconnect(conn)) {
1737                         rc = -EFAULT;
1738                         sess = NULL;
1739                         goto out_err;
1740                 }
1741
1742                 sess = ksmbd_session_lookup(conn, sess_id);
1743                 if (!sess) {
1744                         rc = -EACCES;
1745                         goto out_err;
1746                 }
1747
1748                 if (user_guest(sess->user)) {
1749                         rc = -EOPNOTSUPP;
1750                         goto out_err;
1751                 }
1752
1753                 conn->binding = true;
1754         } else if ((conn->dialect < SMB30_PROT_ID ||
1755                     server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1756                    (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1757                 sess = NULL;
1758                 rc = -EACCES;
1759                 goto out_err;
1760         } else {
1761                 sess = ksmbd_session_lookup(conn,
1762                                             le64_to_cpu(req->hdr.SessionId));
1763                 if (!sess) {
1764                         rc = -ENOENT;
1765                         goto out_err;
1766                 }
1767
1768                 if (sess->state == SMB2_SESSION_EXPIRED) {
1769                         rc = -EFAULT;
1770                         goto out_err;
1771                 }
1772
1773                 if (ksmbd_conn_need_reconnect(conn)) {
1774                         rc = -EFAULT;
1775                         sess = NULL;
1776                         goto out_err;
1777                 }
1778
1779                 conn->binding = false;
1780         }
1781         work->sess = sess;
1782
1783         negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1784         negblob_len = le16_to_cpu(req->SecurityBufferLength);
1785         if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) {
1786                 rc = -EINVAL;
1787                 goto out_err;
1788         }
1789
1790         negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1791                         negblob_off);
1792
1793         if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1794                 if (conn->mechToken) {
1795                         negblob = (struct negotiate_message *)conn->mechToken;
1796                         negblob_len = conn->mechTokenLen;
1797                 }
1798         }
1799
1800         if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1801                 rc = -EINVAL;
1802                 goto out_err;
1803         }
1804
1805         if (server_conf.auth_mechs & conn->auth_mechs) {
1806                 rc = generate_preauth_hash(work);
1807                 if (rc)
1808                         goto out_err;
1809
1810                 if (conn->preferred_auth_mech &
1811                                 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1812                         rc = krb5_authenticate(work, req, rsp);
1813                         if (rc) {
1814                                 rc = -EINVAL;
1815                                 goto out_err;
1816                         }
1817
1818                         if (!ksmbd_conn_need_reconnect(conn)) {
1819                                 ksmbd_conn_set_good(conn);
1820                                 sess->state = SMB2_SESSION_VALID;
1821                         }
1822                         kfree(sess->Preauth_HashValue);
1823                         sess->Preauth_HashValue = NULL;
1824                 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1825                         if (negblob->MessageType == NtLmNegotiate) {
1826                                 rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
1827                                 if (rc)
1828                                         goto out_err;
1829                                 rsp->hdr.Status =
1830                                         STATUS_MORE_PROCESSING_REQUIRED;
1831                         } else if (negblob->MessageType == NtLmAuthenticate) {
1832                                 rc = ntlm_authenticate(work, req, rsp);
1833                                 if (rc)
1834                                         goto out_err;
1835
1836                                 if (!ksmbd_conn_need_reconnect(conn)) {
1837                                         ksmbd_conn_set_good(conn);
1838                                         sess->state = SMB2_SESSION_VALID;
1839                                 }
1840                                 if (conn->binding) {
1841                                         struct preauth_session *preauth_sess;
1842
1843                                         preauth_sess =
1844                                                 ksmbd_preauth_session_lookup(conn, sess->id);
1845                                         if (preauth_sess) {
1846                                                 list_del(&preauth_sess->preauth_entry);
1847                                                 kfree(preauth_sess);
1848                                         }
1849                                 }
1850                                 kfree(sess->Preauth_HashValue);
1851                                 sess->Preauth_HashValue = NULL;
1852                         } else {
1853                                 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
1854                                                 le32_to_cpu(negblob->MessageType));
1855                                 rc = -EINVAL;
1856                         }
1857                 } else {
1858                         /* TODO: need one more negotiation */
1859                         pr_err("Not support the preferred authentication\n");
1860                         rc = -EINVAL;
1861                 }
1862         } else {
1863                 pr_err("Not support authentication\n");
1864                 rc = -EINVAL;
1865         }
1866
1867 out_err:
1868         if (rc == -EINVAL)
1869                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1870         else if (rc == -ENOENT)
1871                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1872         else if (rc == -EACCES)
1873                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1874         else if (rc == -EFAULT)
1875                 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1876         else if (rc == -ENOMEM)
1877                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1878         else if (rc == -EOPNOTSUPP)
1879                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1880         else if (rc)
1881                 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1882
1883         if (conn->use_spnego && conn->mechToken) {
1884                 kfree(conn->mechToken);
1885                 conn->mechToken = NULL;
1886         }
1887
1888         if (rc < 0) {
1889                 /*
1890                  * SecurityBufferOffset should be set to zero
1891                  * in session setup error response.
1892                  */
1893                 rsp->SecurityBufferOffset = 0;
1894
1895                 if (sess) {
1896                         bool try_delay = false;
1897
1898                         /*
1899                          * To avoid dictionary attacks (repeated session setups rapidly sent) to
1900                          * connect to server, ksmbd make a delay of a 5 seconds on session setup
1901                          * failure to make it harder to send enough random connection requests
1902                          * to break into a server.
1903                          */
1904                         if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1905                                 try_delay = true;
1906
1907                         sess->last_active = jiffies;
1908                         sess->state = SMB2_SESSION_EXPIRED;
1909                         if (try_delay) {
1910                                 ksmbd_conn_set_need_reconnect(conn);
1911                                 ssleep(5);
1912                                 ksmbd_conn_set_need_negotiate(conn);
1913                         }
1914                 }
1915                 smb2_set_err_rsp(work);
1916         } else {
1917                 unsigned int iov_len;
1918
1919                 if (rsp->SecurityBufferLength)
1920                         iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
1921                                 le16_to_cpu(rsp->SecurityBufferLength);
1922                 else
1923                         iov_len = sizeof(struct smb2_sess_setup_rsp);
1924                 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
1925                 if (rc)
1926                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1927         }
1928
1929         ksmbd_conn_unlock(conn);
1930         return rc;
1931 }
1932
1933 /**
1934  * smb2_tree_connect() - handler for smb2 tree connect command
1935  * @work:       smb work containing smb request buffer
1936  *
1937  * Return:      0 on success, otherwise error
1938  */
1939 int smb2_tree_connect(struct ksmbd_work *work)
1940 {
1941         struct ksmbd_conn *conn = work->conn;
1942         struct smb2_tree_connect_req *req;
1943         struct smb2_tree_connect_rsp *rsp;
1944         struct ksmbd_session *sess = work->sess;
1945         char *treename = NULL, *name = NULL;
1946         struct ksmbd_tree_conn_status status;
1947         struct ksmbd_share_config *share = NULL;
1948         int rc = -EINVAL;
1949
1950         ksmbd_debug(SMB, "Received smb2 tree connect request\n");
1951
1952         WORK_BUFFERS(work, req, rsp);
1953
1954         treename = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->PathOffset),
1955                                           le16_to_cpu(req->PathLength), true,
1956                                           conn->local_nls);
1957         if (IS_ERR(treename)) {
1958                 pr_err("treename is NULL\n");
1959                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1960                 goto out_err1;
1961         }
1962
1963         name = ksmbd_extract_sharename(conn->um, treename);
1964         if (IS_ERR(name)) {
1965                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1966                 goto out_err1;
1967         }
1968
1969         ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1970                     name, treename);
1971
1972         status = ksmbd_tree_conn_connect(work, name);
1973         if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1974                 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1975         else
1976                 goto out_err1;
1977
1978         share = status.tree_conn->share_conf;
1979         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1980                 ksmbd_debug(SMB, "IPC share path request\n");
1981                 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1982                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1983                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1984                         FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1985                         FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1986                         FILE_SYNCHRONIZE_LE;
1987         } else {
1988                 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1989                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1990                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1991                 if (test_tree_conn_flag(status.tree_conn,
1992                                         KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1993                         rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1994                                 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1995                                 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1996                                 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1997                                 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1998                                 FILE_SYNCHRONIZE_LE;
1999                 }
2000         }
2001
2002         status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
2003         if (conn->posix_ext_supported)
2004                 status.tree_conn->posix_extensions = true;
2005
2006         write_lock(&sess->tree_conns_lock);
2007         status.tree_conn->t_state = TREE_CONNECTED;
2008         write_unlock(&sess->tree_conns_lock);
2009         rsp->StructureSize = cpu_to_le16(16);
2010 out_err1:
2011         if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && share &&
2012             test_share_config_flag(share,
2013                                    KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
2014                 rsp->Capabilities = SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY;
2015         else
2016                 rsp->Capabilities = 0;
2017         rsp->Reserved = 0;
2018         /* default manual caching */
2019         rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
2020
2021         rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
2022         if (rc)
2023                 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
2024
2025         if (!IS_ERR(treename))
2026                 kfree(treename);
2027         if (!IS_ERR(name))
2028                 kfree(name);
2029
2030         switch (status.ret) {
2031         case KSMBD_TREE_CONN_STATUS_OK:
2032                 rsp->hdr.Status = STATUS_SUCCESS;
2033                 rc = 0;
2034                 break;
2035         case -ESTALE:
2036         case -ENOENT:
2037         case KSMBD_TREE_CONN_STATUS_NO_SHARE:
2038                 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
2039                 break;
2040         case -ENOMEM:
2041         case KSMBD_TREE_CONN_STATUS_NOMEM:
2042                 rsp->hdr.Status = STATUS_NO_MEMORY;
2043                 break;
2044         case KSMBD_TREE_CONN_STATUS_ERROR:
2045         case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
2046         case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
2047                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2048                 break;
2049         case -EINVAL:
2050                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2051                 break;
2052         default:
2053                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2054         }
2055
2056         if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
2057                 smb2_set_err_rsp(work);
2058
2059         return rc;
2060 }
2061
2062 /**
2063  * smb2_create_open_flags() - convert smb open flags to unix open flags
2064  * @file_present:       is file already present
2065  * @access:             file access flags
2066  * @disposition:        file disposition flags
2067  * @may_flags:          set with MAY_ flags
2068  * @coptions:           file creation options
2069  * @mode:               file mode
2070  *
2071  * Return:      file open flags
2072  */
2073 static int smb2_create_open_flags(bool file_present, __le32 access,
2074                                   __le32 disposition,
2075                                   int *may_flags,
2076                                   __le32 coptions,
2077                                   umode_t mode)
2078 {
2079         int oflags = O_NONBLOCK | O_LARGEFILE;
2080
2081         if (coptions & FILE_DIRECTORY_FILE_LE || S_ISDIR(mode)) {
2082                 access &= ~FILE_WRITE_DESIRE_ACCESS_LE;
2083                 ksmbd_debug(SMB, "Discard write access to a directory\n");
2084         }
2085
2086         if (access & FILE_READ_DESIRED_ACCESS_LE &&
2087             access & FILE_WRITE_DESIRE_ACCESS_LE) {
2088                 oflags |= O_RDWR;
2089                 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
2090         } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
2091                 oflags |= O_WRONLY;
2092                 *may_flags = MAY_OPEN | MAY_WRITE;
2093         } else {
2094                 oflags |= O_RDONLY;
2095                 *may_flags = MAY_OPEN | MAY_READ;
2096         }
2097
2098         if (access == FILE_READ_ATTRIBUTES_LE || S_ISBLK(mode) || S_ISCHR(mode))
2099                 oflags |= O_PATH;
2100
2101         if (file_present) {
2102                 switch (disposition & FILE_CREATE_MASK_LE) {
2103                 case FILE_OPEN_LE:
2104                 case FILE_CREATE_LE:
2105                         break;
2106                 case FILE_SUPERSEDE_LE:
2107                 case FILE_OVERWRITE_LE:
2108                 case FILE_OVERWRITE_IF_LE:
2109                         oflags |= O_TRUNC;
2110                         break;
2111                 default:
2112                         break;
2113                 }
2114         } else {
2115                 switch (disposition & FILE_CREATE_MASK_LE) {
2116                 case FILE_SUPERSEDE_LE:
2117                 case FILE_CREATE_LE:
2118                 case FILE_OPEN_IF_LE:
2119                 case FILE_OVERWRITE_IF_LE:
2120                         oflags |= O_CREAT;
2121                         break;
2122                 case FILE_OPEN_LE:
2123                 case FILE_OVERWRITE_LE:
2124                         oflags &= ~O_CREAT;
2125                         break;
2126                 default:
2127                         break;
2128                 }
2129         }
2130
2131         return oflags;
2132 }
2133
2134 /**
2135  * smb2_tree_disconnect() - handler for smb tree connect request
2136  * @work:       smb work containing request buffer
2137  *
2138  * Return:      0
2139  */
2140 int smb2_tree_disconnect(struct ksmbd_work *work)
2141 {
2142         struct smb2_tree_disconnect_rsp *rsp;
2143         struct smb2_tree_disconnect_req *req;
2144         struct ksmbd_session *sess = work->sess;
2145         struct ksmbd_tree_connect *tcon = work->tcon;
2146         int err;
2147
2148         ksmbd_debug(SMB, "Received smb2 tree disconnect request\n");
2149
2150         WORK_BUFFERS(work, req, rsp);
2151
2152         if (!tcon) {
2153                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2154
2155                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2156                 err = -ENOENT;
2157                 goto err_out;
2158         }
2159
2160         ksmbd_close_tree_conn_fds(work);
2161
2162         write_lock(&sess->tree_conns_lock);
2163         if (tcon->t_state == TREE_DISCONNECTED) {
2164                 write_unlock(&sess->tree_conns_lock);
2165                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2166                 err = -ENOENT;
2167                 goto err_out;
2168         }
2169
2170         WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));
2171         tcon->t_state = TREE_DISCONNECTED;
2172         write_unlock(&sess->tree_conns_lock);
2173
2174         err = ksmbd_tree_conn_disconnect(sess, tcon);
2175         if (err) {
2176                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2177                 goto err_out;
2178         }
2179
2180         work->tcon = NULL;
2181
2182         rsp->StructureSize = cpu_to_le16(4);
2183         err = ksmbd_iov_pin_rsp(work, rsp,
2184                                 sizeof(struct smb2_tree_disconnect_rsp));
2185         if (err) {
2186                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2187                 goto err_out;
2188         }
2189
2190         return 0;
2191
2192 err_out:
2193         smb2_set_err_rsp(work);
2194         return err;
2195
2196 }
2197
2198 /**
2199  * smb2_session_logoff() - handler for session log off request
2200  * @work:       smb work containing request buffer
2201  *
2202  * Return:      0
2203  */
2204 int smb2_session_logoff(struct ksmbd_work *work)
2205 {
2206         struct ksmbd_conn *conn = work->conn;
2207         struct ksmbd_session *sess = work->sess;
2208         struct smb2_logoff_req *req;
2209         struct smb2_logoff_rsp *rsp;
2210         u64 sess_id;
2211         int err;
2212
2213         WORK_BUFFERS(work, req, rsp);
2214
2215         ksmbd_debug(SMB, "Received smb2 session logoff request\n");
2216
2217         ksmbd_conn_lock(conn);
2218         if (!ksmbd_conn_good(conn)) {
2219                 ksmbd_conn_unlock(conn);
2220                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2221                 smb2_set_err_rsp(work);
2222                 return -ENOENT;
2223         }
2224         sess_id = le64_to_cpu(req->hdr.SessionId);
2225         ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
2226         ksmbd_conn_unlock(conn);
2227
2228         ksmbd_close_session_fds(work);
2229         ksmbd_conn_wait_idle(conn);
2230
2231         if (ksmbd_tree_conn_session_logoff(sess)) {
2232                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2233                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2234                 smb2_set_err_rsp(work);
2235                 return -ENOENT;
2236         }
2237
2238         ksmbd_destroy_file_table(&sess->file_table);
2239         down_write(&conn->session_lock);
2240         sess->state = SMB2_SESSION_EXPIRED;
2241         up_write(&conn->session_lock);
2242
2243         ksmbd_free_user(sess->user);
2244         sess->user = NULL;
2245         ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
2246
2247         rsp->StructureSize = cpu_to_le16(4);
2248         err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
2249         if (err) {
2250                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2251                 smb2_set_err_rsp(work);
2252                 return err;
2253         }
2254         return 0;
2255 }
2256
2257 /**
2258  * create_smb2_pipe() - create IPC pipe
2259  * @work:       smb work containing request buffer
2260  *
2261  * Return:      0 on success, otherwise error
2262  */
2263 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2264 {
2265         struct smb2_create_rsp *rsp;
2266         struct smb2_create_req *req;
2267         int id;
2268         int err;
2269         char *name;
2270
2271         WORK_BUFFERS(work, req, rsp);
2272
2273         name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2274                                       1, work->conn->local_nls);
2275         if (IS_ERR(name)) {
2276                 rsp->hdr.Status = STATUS_NO_MEMORY;
2277                 err = PTR_ERR(name);
2278                 goto out;
2279         }
2280
2281         id = ksmbd_session_rpc_open(work->sess, name);
2282         if (id < 0) {
2283                 pr_err("Unable to open RPC pipe: %d\n", id);
2284                 err = id;
2285                 goto out;
2286         }
2287
2288         rsp->hdr.Status = STATUS_SUCCESS;
2289         rsp->StructureSize = cpu_to_le16(89);
2290         rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2291         rsp->Flags = 0;
2292         rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2293
2294         rsp->CreationTime = cpu_to_le64(0);
2295         rsp->LastAccessTime = cpu_to_le64(0);
2296         rsp->ChangeTime = cpu_to_le64(0);
2297         rsp->AllocationSize = cpu_to_le64(0);
2298         rsp->EndofFile = cpu_to_le64(0);
2299         rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2300         rsp->Reserved2 = 0;
2301         rsp->VolatileFileId = id;
2302         rsp->PersistentFileId = 0;
2303         rsp->CreateContextsOffset = 0;
2304         rsp->CreateContextsLength = 0;
2305
2306         err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
2307         if (err)
2308                 goto out;
2309
2310         kfree(name);
2311         return 0;
2312
2313 out:
2314         switch (err) {
2315         case -EINVAL:
2316                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2317                 break;
2318         case -ENOSPC:
2319         case -ENOMEM:
2320                 rsp->hdr.Status = STATUS_NO_MEMORY;
2321                 break;
2322         }
2323
2324         if (!IS_ERR(name))
2325                 kfree(name);
2326
2327         smb2_set_err_rsp(work);
2328         return err;
2329 }
2330
2331 /**
2332  * smb2_set_ea() - handler for setting extended attributes using set
2333  *              info command
2334  * @eabuf:      set info command buffer
2335  * @buf_len:    set info command buffer length
2336  * @path:       dentry path for get ea
2337  * @get_write:  get write access to a mount
2338  *
2339  * Return:      0 on success, otherwise error
2340  */
2341 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2342                        const struct path *path, bool get_write)
2343 {
2344         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2345         char *attr_name = NULL, *value;
2346         int rc = 0;
2347         unsigned int next = 0;
2348
2349         if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2350                         le16_to_cpu(eabuf->EaValueLength))
2351                 return -EINVAL;
2352
2353         attr_name = kmalloc(XATTR_NAME_MAX + 1, KSMBD_DEFAULT_GFP);
2354         if (!attr_name)
2355                 return -ENOMEM;
2356
2357         do {
2358                 if (!eabuf->EaNameLength)
2359                         goto next;
2360
2361                 ksmbd_debug(SMB,
2362                             "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2363                             eabuf->name, eabuf->EaNameLength,
2364                             le16_to_cpu(eabuf->EaValueLength),
2365                             le32_to_cpu(eabuf->NextEntryOffset));
2366
2367                 if (eabuf->EaNameLength >
2368                     (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2369                         rc = -EINVAL;
2370                         break;
2371                 }
2372
2373                 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2374                 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2375                        eabuf->EaNameLength);
2376                 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2377                 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2378
2379                 if (!eabuf->EaValueLength) {
2380                         rc = ksmbd_vfs_casexattr_len(idmap,
2381                                                      path->dentry,
2382                                                      attr_name,
2383                                                      XATTR_USER_PREFIX_LEN +
2384                                                      eabuf->EaNameLength);
2385
2386                         /* delete the EA only when it exits */
2387                         if (rc > 0) {
2388                                 rc = ksmbd_vfs_remove_xattr(idmap,
2389                                                             path,
2390                                                             attr_name,
2391                                                             get_write);
2392
2393                                 if (rc < 0) {
2394                                         ksmbd_debug(SMB,
2395                                                     "remove xattr failed(%d)\n",
2396                                                     rc);
2397                                         break;
2398                                 }
2399                         }
2400
2401                         /* if the EA doesn't exist, just do nothing. */
2402                         rc = 0;
2403                 } else {
2404                         rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
2405                                                 le16_to_cpu(eabuf->EaValueLength),
2406                                                 0, get_write);
2407                         if (rc < 0) {
2408                                 ksmbd_debug(SMB,
2409                                             "ksmbd_vfs_setxattr is failed(%d)\n",
2410                                             rc);
2411                                 break;
2412                         }
2413                 }
2414
2415 next:
2416                 next = le32_to_cpu(eabuf->NextEntryOffset);
2417                 if (next == 0 || buf_len < next)
2418                         break;
2419                 buf_len -= next;
2420                 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2421                 if (buf_len < sizeof(struct smb2_ea_info)) {
2422                         rc = -EINVAL;
2423                         break;
2424                 }
2425
2426                 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2427                                 le16_to_cpu(eabuf->EaValueLength)) {
2428                         rc = -EINVAL;
2429                         break;
2430                 }
2431         } while (next != 0);
2432
2433         kfree(attr_name);
2434         return rc;
2435 }
2436
2437 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2438                                                struct ksmbd_file *fp,
2439                                                char *stream_name, int s_type)
2440 {
2441         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2442         size_t xattr_stream_size;
2443         char *xattr_stream_name;
2444         int rc;
2445
2446         rc = ksmbd_vfs_xattr_stream_name(stream_name,
2447                                          &xattr_stream_name,
2448                                          &xattr_stream_size,
2449                                          s_type);
2450         if (rc)
2451                 return rc;
2452
2453         fp->stream.name = xattr_stream_name;
2454         fp->stream.size = xattr_stream_size;
2455
2456         /* Check if there is stream prefix in xattr space */
2457         rc = ksmbd_vfs_casexattr_len(idmap,
2458                                      path->dentry,
2459                                      xattr_stream_name,
2460                                      xattr_stream_size);
2461         if (rc >= 0)
2462                 return 0;
2463
2464         if (fp->cdoption == FILE_OPEN_LE) {
2465                 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2466                 return -EBADF;
2467         }
2468
2469         rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false);
2470         if (rc < 0)
2471                 pr_err("Failed to store XATTR stream name :%d\n", rc);
2472         return 0;
2473 }
2474
2475 static int smb2_remove_smb_xattrs(const struct path *path)
2476 {
2477         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2478         char *name, *xattr_list = NULL;
2479         ssize_t xattr_list_len;
2480         int err = 0;
2481
2482         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2483         if (xattr_list_len < 0) {
2484                 goto out;
2485         } else if (!xattr_list_len) {
2486                 ksmbd_debug(SMB, "empty xattr in the file\n");
2487                 goto out;
2488         }
2489
2490         for (name = xattr_list; name - xattr_list < xattr_list_len;
2491                         name += strlen(name) + 1) {
2492                 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2493
2494                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2495                     !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2496                              STREAM_PREFIX_LEN)) {
2497                         err = ksmbd_vfs_remove_xattr(idmap, path,
2498                                                      name, true);
2499                         if (err)
2500                                 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2501                                             name);
2502                 }
2503         }
2504 out:
2505         kvfree(xattr_list);
2506         return err;
2507 }
2508
2509 static int smb2_create_truncate(const struct path *path)
2510 {
2511         int rc = vfs_truncate(path, 0);
2512
2513         if (rc) {
2514                 pr_err("vfs_truncate failed, rc %d\n", rc);
2515                 return rc;
2516         }
2517
2518         rc = smb2_remove_smb_xattrs(path);
2519         if (rc == -EOPNOTSUPP)
2520                 rc = 0;
2521         if (rc)
2522                 ksmbd_debug(SMB,
2523                             "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2524                             rc);
2525         return rc;
2526 }
2527
2528 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2529                             struct ksmbd_file *fp)
2530 {
2531         struct xattr_dos_attrib da = {0};
2532         int rc;
2533
2534         if (!test_share_config_flag(tcon->share_conf,
2535                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2536                 return;
2537
2538         da.version = 4;
2539         da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2540         da.itime = da.create_time = fp->create_time;
2541         da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2542                 XATTR_DOSINFO_ITIME;
2543
2544         rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true);
2545         if (rc)
2546                 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2547 }
2548
2549 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2550                                const struct path *path, struct ksmbd_file *fp)
2551 {
2552         struct xattr_dos_attrib da;
2553         int rc;
2554
2555         fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2556
2557         /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2558         if (!test_share_config_flag(tcon->share_conf,
2559                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2560                 return;
2561
2562         rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
2563                                             path->dentry, &da);
2564         if (rc > 0) {
2565                 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2566                 fp->create_time = da.create_time;
2567                 fp->itime = da.itime;
2568         }
2569 }
2570
2571 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
2572                       struct path *path, char *name, int open_flags,
2573                       umode_t posix_mode, bool is_dir)
2574 {
2575         struct ksmbd_tree_connect *tcon = work->tcon;
2576         struct ksmbd_share_config *share = tcon->share_conf;
2577         umode_t mode;
2578         int rc;
2579
2580         if (!(open_flags & O_CREAT))
2581                 return -EBADF;
2582
2583         ksmbd_debug(SMB, "file does not exist, so creating\n");
2584         if (is_dir == true) {
2585                 ksmbd_debug(SMB, "creating directory\n");
2586
2587                 mode = share_config_directory_mode(share, posix_mode);
2588                 rc = ksmbd_vfs_mkdir(work, name, mode);
2589                 if (rc)
2590                         return rc;
2591         } else {
2592                 ksmbd_debug(SMB, "creating regular file\n");
2593
2594                 mode = share_config_create_mode(share, posix_mode);
2595                 rc = ksmbd_vfs_create(work, name, mode);
2596                 if (rc)
2597                         return rc;
2598         }
2599
2600         rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);
2601         if (rc) {
2602                 pr_err("cannot get linux path (%s), err = %d\n",
2603                        name, rc);
2604                 return rc;
2605         }
2606         return 0;
2607 }
2608
2609 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2610                                  struct smb2_create_req *req,
2611                                  const struct path *path)
2612 {
2613         struct create_context *context;
2614         struct create_sd_buf_req *sd_buf;
2615
2616         if (!req->CreateContextsOffset)
2617                 return -ENOENT;
2618
2619         /* Parse SD BUFFER create contexts */
2620         context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
2621         if (!context)
2622                 return -ENOENT;
2623         else if (IS_ERR(context))
2624                 return PTR_ERR(context);
2625
2626         ksmbd_debug(SMB,
2627                     "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2628         sd_buf = (struct create_sd_buf_req *)context;
2629         if (le16_to_cpu(context->DataOffset) +
2630             le32_to_cpu(context->DataLength) <
2631             sizeof(struct create_sd_buf_req))
2632                 return -EINVAL;
2633         return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2634                             le32_to_cpu(sd_buf->ccontext.DataLength), true, false);
2635 }
2636
2637 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2638                              struct mnt_idmap *idmap,
2639                              struct inode *inode)
2640 {
2641         vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
2642         vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
2643
2644         fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2645         fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2646         fattr->cf_mode = inode->i_mode;
2647         fattr->cf_acls = NULL;
2648         fattr->cf_dacls = NULL;
2649
2650         if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2651                 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2652                 if (S_ISDIR(inode->i_mode))
2653                         fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2654         }
2655 }
2656
2657 enum {
2658         DURABLE_RECONN_V2 = 1,
2659         DURABLE_RECONN,
2660         DURABLE_REQ_V2,
2661         DURABLE_REQ,
2662 };
2663
2664 struct durable_info {
2665         struct ksmbd_file *fp;
2666         unsigned short int type;
2667         bool persistent;
2668         bool reconnected;
2669         unsigned int timeout;
2670         char *CreateGuid;
2671 };
2672
2673 static int parse_durable_handle_context(struct ksmbd_work *work,
2674                                         struct smb2_create_req *req,
2675                                         struct lease_ctx_info *lc,
2676                                         struct durable_info *dh_info)
2677 {
2678         struct ksmbd_conn *conn = work->conn;
2679         struct create_context *context;
2680         int dh_idx, err = 0;
2681         u64 persistent_id = 0;
2682         int req_op_level;
2683         static const char * const durable_arr[] = {"DH2C", "DHnC", "DH2Q", "DHnQ"};
2684
2685         req_op_level = req->RequestedOplockLevel;
2686         for (dh_idx = DURABLE_RECONN_V2; dh_idx <= ARRAY_SIZE(durable_arr);
2687              dh_idx++) {
2688                 context = smb2_find_context_vals(req, durable_arr[dh_idx - 1], 4);
2689                 if (IS_ERR(context)) {
2690                         err = PTR_ERR(context);
2691                         goto out;
2692                 }
2693                 if (!context)
2694                         continue;
2695
2696                 switch (dh_idx) {
2697                 case DURABLE_RECONN_V2:
2698                 {
2699                         struct create_durable_reconn_v2_req *recon_v2;
2700
2701                         if (dh_info->type == DURABLE_RECONN ||
2702                             dh_info->type == DURABLE_REQ_V2) {
2703                                 err = -EINVAL;
2704                                 goto out;
2705                         }
2706
2707                         recon_v2 = (struct create_durable_reconn_v2_req *)context;
2708                         persistent_id = recon_v2->Fid.PersistentFileId;
2709                         dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2710                         if (!dh_info->fp) {
2711                                 ksmbd_debug(SMB, "Failed to get durable handle state\n");
2712                                 err = -EBADF;
2713                                 goto out;
2714                         }
2715
2716                         if (memcmp(dh_info->fp->create_guid, recon_v2->CreateGuid,
2717                                    SMB2_CREATE_GUID_SIZE)) {
2718                                 err = -EBADF;
2719                                 ksmbd_put_durable_fd(dh_info->fp);
2720                                 goto out;
2721                         }
2722
2723                         dh_info->type = dh_idx;
2724                         dh_info->reconnected = true;
2725                         ksmbd_debug(SMB,
2726                                 "reconnect v2 Persistent-id from reconnect = %llu\n",
2727                                         persistent_id);
2728                         break;
2729                 }
2730                 case DURABLE_RECONN:
2731                 {
2732                         struct create_durable_reconn_req *recon;
2733
2734                         if (dh_info->type == DURABLE_RECONN_V2 ||
2735                             dh_info->type == DURABLE_REQ_V2) {
2736                                 err = -EINVAL;
2737                                 goto out;
2738                         }
2739
2740                         recon = (struct create_durable_reconn_req *)context;
2741                         persistent_id = recon->Data.Fid.PersistentFileId;
2742                         dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2743                         if (!dh_info->fp) {
2744                                 ksmbd_debug(SMB, "Failed to get durable handle state\n");
2745                                 err = -EBADF;
2746                                 goto out;
2747                         }
2748
2749                         dh_info->type = dh_idx;
2750                         dh_info->reconnected = true;
2751                         ksmbd_debug(SMB, "reconnect Persistent-id from reconnect = %llu\n",
2752                                     persistent_id);
2753                         break;
2754                 }
2755                 case DURABLE_REQ_V2:
2756                 {
2757                         struct create_durable_req_v2 *durable_v2_blob;
2758
2759                         if (dh_info->type == DURABLE_RECONN ||
2760                             dh_info->type == DURABLE_RECONN_V2) {
2761                                 err = -EINVAL;
2762                                 goto out;
2763                         }
2764
2765                         durable_v2_blob =
2766                                 (struct create_durable_req_v2 *)context;
2767                         ksmbd_debug(SMB, "Request for durable v2 open\n");
2768                         dh_info->fp = ksmbd_lookup_fd_cguid(durable_v2_blob->CreateGuid);
2769                         if (dh_info->fp) {
2770                                 if (!memcmp(conn->ClientGUID, dh_info->fp->client_guid,
2771                                             SMB2_CLIENT_GUID_SIZE)) {
2772                                         if (!(req->hdr.Flags & SMB2_FLAGS_REPLAY_OPERATION)) {
2773                                                 err = -ENOEXEC;
2774                                                 goto out;
2775                                         }
2776
2777                                         dh_info->fp->conn = conn;
2778                                         dh_info->reconnected = true;
2779                                         goto out;
2780                                 }
2781                         }
2782
2783                         if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2784                             req_op_level == SMB2_OPLOCK_LEVEL_BATCH) {
2785                                 dh_info->CreateGuid =
2786                                         durable_v2_blob->CreateGuid;
2787                                 dh_info->persistent =
2788                                         le32_to_cpu(durable_v2_blob->Flags);
2789                                 dh_info->timeout =
2790                                         le32_to_cpu(durable_v2_blob->Timeout);
2791                                 dh_info->type = dh_idx;
2792                         }
2793                         break;
2794                 }
2795                 case DURABLE_REQ:
2796                         if (dh_info->type == DURABLE_RECONN)
2797                                 goto out;
2798                         if (dh_info->type == DURABLE_RECONN_V2 ||
2799                             dh_info->type == DURABLE_REQ_V2) {
2800                                 err = -EINVAL;
2801                                 goto out;
2802                         }
2803
2804                         if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2805                             req_op_level == SMB2_OPLOCK_LEVEL_BATCH) {
2806                                 ksmbd_debug(SMB, "Request for durable open\n");
2807                                 dh_info->type = dh_idx;
2808                         }
2809                 }
2810         }
2811
2812 out:
2813         return err;
2814 }
2815
2816 /**
2817  * smb2_open() - handler for smb file open request
2818  * @work:       smb work containing request buffer
2819  *
2820  * Return:      0 on success, otherwise error
2821  */
2822 int smb2_open(struct ksmbd_work *work)
2823 {
2824         struct ksmbd_conn *conn = work->conn;
2825         struct ksmbd_session *sess = work->sess;
2826         struct ksmbd_tree_connect *tcon = work->tcon;
2827         struct smb2_create_req *req;
2828         struct smb2_create_rsp *rsp;
2829         struct path path, parent_path;
2830         struct ksmbd_share_config *share = tcon->share_conf;
2831         struct ksmbd_file *fp = NULL;
2832         struct file *filp = NULL;
2833         struct mnt_idmap *idmap = NULL;
2834         struct kstat stat;
2835         struct create_context *context;
2836         struct lease_ctx_info *lc = NULL;
2837         struct create_ea_buf_req *ea_buf = NULL;
2838         struct oplock_info *opinfo;
2839         struct durable_info dh_info = {0};
2840         __le32 *next_ptr = NULL;
2841         int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2842         int rc = 0;
2843         int contxt_cnt = 0, query_disk_id = 0;
2844         int maximal_access_ctxt = 0, posix_ctxt = 0;
2845         int s_type = 0;
2846         int next_off = 0;
2847         char *name = NULL;
2848         char *stream_name = NULL;
2849         bool file_present = false, created = false, already_permitted = false;
2850         int share_ret, need_truncate = 0;
2851         u64 time;
2852         umode_t posix_mode = 0;
2853         __le32 daccess, maximal_access = 0;
2854         int iov_len = 0;
2855
2856         ksmbd_debug(SMB, "Received smb2 create request\n");
2857
2858         WORK_BUFFERS(work, req, rsp);
2859
2860         if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2861             (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2862                 ksmbd_debug(SMB, "invalid flag in chained command\n");
2863                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2864                 smb2_set_err_rsp(work);
2865                 return -EINVAL;
2866         }
2867
2868         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2869                 ksmbd_debug(SMB, "IPC pipe create request\n");
2870                 return create_smb2_pipe(work);
2871         }
2872
2873         if (req->NameLength) {
2874                 name = smb2_get_name((char *)req + le16_to_cpu(req->NameOffset),
2875                                      le16_to_cpu(req->NameLength),
2876                                      work->conn->local_nls);
2877                 if (IS_ERR(name)) {
2878                         rc = PTR_ERR(name);
2879                         name = NULL;
2880                         goto err_out2;
2881                 }
2882
2883                 ksmbd_debug(SMB, "converted name = %s\n", name);
2884                 if (strchr(name, ':')) {
2885                         if (!test_share_config_flag(work->tcon->share_conf,
2886                                                     KSMBD_SHARE_FLAG_STREAMS)) {
2887                                 rc = -EBADF;
2888                                 goto err_out2;
2889                         }
2890                         rc = parse_stream_name(name, &stream_name, &s_type);
2891                         if (rc < 0)
2892                                 goto err_out2;
2893                 }
2894
2895                 rc = ksmbd_validate_filename(name);
2896                 if (rc < 0)
2897                         goto err_out2;
2898
2899                 if (ksmbd_share_veto_filename(share, name)) {
2900                         rc = -ENOENT;
2901                         ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2902                                     name);
2903                         goto err_out2;
2904                 }
2905         } else {
2906                 name = kstrdup("", KSMBD_DEFAULT_GFP);
2907                 if (!name) {
2908                         rc = -ENOMEM;
2909                         goto err_out2;
2910                 }
2911         }
2912
2913         req_op_level = req->RequestedOplockLevel;
2914
2915         if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE &&
2916             req->CreateContextsOffset) {
2917                 lc = parse_lease_state(req);
2918                 rc = parse_durable_handle_context(work, req, lc, &dh_info);
2919                 if (rc) {
2920                         ksmbd_debug(SMB, "error parsing durable handle context\n");
2921                         goto err_out2;
2922                 }
2923
2924                 if (dh_info.reconnected == true) {
2925                         rc = smb2_check_durable_oplock(conn, share, dh_info.fp, lc, name);
2926                         if (rc) {
2927                                 ksmbd_put_durable_fd(dh_info.fp);
2928                                 goto err_out2;
2929                         }
2930
2931                         rc = ksmbd_reopen_durable_fd(work, dh_info.fp);
2932                         if (rc) {
2933                                 ksmbd_put_durable_fd(dh_info.fp);
2934                                 goto err_out2;
2935                         }
2936
2937                         if (ksmbd_override_fsids(work)) {
2938                                 rc = -ENOMEM;
2939                                 ksmbd_put_durable_fd(dh_info.fp);
2940                                 goto err_out2;
2941                         }
2942
2943                         fp = dh_info.fp;
2944                         file_info = FILE_OPENED;
2945
2946                         rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat);
2947                         if (rc)
2948                                 goto err_out2;
2949
2950                         ksmbd_put_durable_fd(fp);
2951                         goto reconnected_fp;
2952                 }
2953         } else if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2954                 lc = parse_lease_state(req);
2955
2956         if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2957                 pr_err("Invalid impersonationlevel : 0x%x\n",
2958                        le32_to_cpu(req->ImpersonationLevel));
2959                 rc = -EIO;
2960                 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2961                 goto err_out2;
2962         }
2963
2964         if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2965                 pr_err("Invalid create options : 0x%x\n",
2966                        le32_to_cpu(req->CreateOptions));
2967                 rc = -EINVAL;
2968                 goto err_out2;
2969         } else {
2970                 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2971                     req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2972                         req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2973
2974                 if (req->CreateOptions &
2975                     (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2976                      FILE_RESERVE_OPFILTER_LE)) {
2977                         rc = -EOPNOTSUPP;
2978                         goto err_out2;
2979                 }
2980
2981                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2982                         if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2983                                 rc = -EINVAL;
2984                                 goto err_out2;
2985                         } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2986                                 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2987                         }
2988                 }
2989         }
2990
2991         if (le32_to_cpu(req->CreateDisposition) >
2992             le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2993                 pr_err("Invalid create disposition : 0x%x\n",
2994                        le32_to_cpu(req->CreateDisposition));
2995                 rc = -EINVAL;
2996                 goto err_out2;
2997         }
2998
2999         if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
3000                 pr_err("Invalid desired access : 0x%x\n",
3001                        le32_to_cpu(req->DesiredAccess));
3002                 rc = -EACCES;
3003                 goto err_out2;
3004         }
3005
3006         if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
3007                 pr_err("Invalid file attribute : 0x%x\n",
3008                        le32_to_cpu(req->FileAttributes));
3009                 rc = -EINVAL;
3010                 goto err_out2;
3011         }
3012
3013         if (req->CreateContextsOffset) {
3014                 /* Parse non-durable handle create contexts */
3015                 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
3016                 if (IS_ERR(context)) {
3017                         rc = PTR_ERR(context);
3018                         goto err_out2;
3019                 } else if (context) {
3020                         ea_buf = (struct create_ea_buf_req *)context;
3021                         if (le16_to_cpu(context->DataOffset) +
3022                             le32_to_cpu(context->DataLength) <
3023                             sizeof(struct create_ea_buf_req)) {
3024                                 rc = -EINVAL;
3025                                 goto err_out2;
3026                         }
3027                         if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
3028                                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3029                                 rc = -EACCES;
3030                                 goto err_out2;
3031                         }
3032                 }
3033
3034                 context = smb2_find_context_vals(req,
3035                                                  SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
3036                 if (IS_ERR(context)) {
3037                         rc = PTR_ERR(context);
3038                         goto err_out2;
3039                 } else if (context) {
3040                         ksmbd_debug(SMB,
3041                                     "get query maximal access context\n");
3042                         maximal_access_ctxt = 1;
3043                 }
3044
3045                 context = smb2_find_context_vals(req,
3046                                                  SMB2_CREATE_TIMEWARP_REQUEST, 4);
3047                 if (IS_ERR(context)) {
3048                         rc = PTR_ERR(context);
3049                         goto err_out2;
3050                 } else if (context) {
3051                         ksmbd_debug(SMB, "get timewarp context\n");
3052                         rc = -EBADF;
3053                         goto err_out2;
3054                 }
3055
3056                 if (tcon->posix_extensions) {
3057                         context = smb2_find_context_vals(req,
3058                                                          SMB2_CREATE_TAG_POSIX, 16);
3059                         if (IS_ERR(context)) {
3060                                 rc = PTR_ERR(context);
3061                                 goto err_out2;
3062                         } else if (context) {
3063                                 struct create_posix *posix =
3064                                         (struct create_posix *)context;
3065                                 if (le16_to_cpu(context->DataOffset) +
3066                                     le32_to_cpu(context->DataLength) <
3067                                     sizeof(struct create_posix) - 4) {
3068                                         rc = -EINVAL;
3069                                         goto err_out2;
3070                                 }
3071                                 ksmbd_debug(SMB, "get posix context\n");
3072
3073                                 posix_mode = le32_to_cpu(posix->Mode);
3074                                 posix_ctxt = 1;
3075                         }
3076                 }
3077         }
3078
3079         if (ksmbd_override_fsids(work)) {
3080                 rc = -ENOMEM;
3081                 goto err_out2;
3082         }
3083
3084         rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
3085                                         &parent_path, &path, 1);
3086         if (!rc) {
3087                 file_present = true;
3088
3089                 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
3090                         /*
3091                          * If file exists with under flags, return access
3092                          * denied error.
3093                          */
3094                         if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
3095                             req->CreateDisposition == FILE_OPEN_IF_LE) {
3096                                 rc = -EACCES;
3097                                 goto err_out;
3098                         }
3099
3100                         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3101                                 ksmbd_debug(SMB,
3102                                             "User does not have write permission\n");
3103                                 rc = -EACCES;
3104                                 goto err_out;
3105                         }
3106                 } else if (d_is_symlink(path.dentry)) {
3107                         rc = -EACCES;
3108                         goto err_out;
3109                 }
3110
3111                 idmap = mnt_idmap(path.mnt);
3112         } else {
3113                 if (rc != -ENOENT)
3114                         goto err_out;
3115                 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
3116                             name, rc);
3117                 rc = 0;
3118         }
3119
3120         if (stream_name) {
3121                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
3122                         if (s_type == DATA_STREAM) {
3123                                 rc = -EIO;
3124                                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3125                         }
3126                 } else {
3127                         if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
3128                             s_type == DATA_STREAM) {
3129                                 rc = -EIO;
3130                                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3131                         }
3132                 }
3133
3134                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
3135                     req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
3136                         rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3137                         rc = -EIO;
3138                 }
3139
3140                 if (rc < 0)
3141                         goto err_out;
3142         }
3143
3144         if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
3145             S_ISDIR(d_inode(path.dentry)->i_mode) &&
3146             !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3147                 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
3148                             name, req->CreateOptions);
3149                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3150                 rc = -EIO;
3151                 goto err_out;
3152         }
3153
3154         if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
3155             !(req->CreateDisposition == FILE_CREATE_LE) &&
3156             !S_ISDIR(d_inode(path.dentry)->i_mode)) {
3157                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3158                 rc = -EIO;
3159                 goto err_out;
3160         }
3161
3162         if (!stream_name && file_present &&
3163             req->CreateDisposition == FILE_CREATE_LE) {
3164                 rc = -EEXIST;
3165                 goto err_out;
3166         }
3167
3168         daccess = smb_map_generic_desired_access(req->DesiredAccess);
3169
3170         if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3171                 rc = smb_check_perm_dacl(conn, &path, &daccess,
3172                                          sess->user->uid);
3173                 if (rc)
3174                         goto err_out;
3175         }
3176
3177         if (daccess & FILE_MAXIMAL_ACCESS_LE) {
3178                 if (!file_present) {
3179                         daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
3180                 } else {
3181                         ksmbd_vfs_query_maximal_access(idmap,
3182                                                             path.dentry,
3183                                                             &daccess);
3184                         already_permitted = true;
3185                 }
3186                 maximal_access = daccess;
3187         }
3188
3189         open_flags = smb2_create_open_flags(file_present, daccess,
3190                                             req->CreateDisposition,
3191                                             &may_flags,
3192                                             req->CreateOptions,
3193                                             file_present ? d_inode(path.dentry)->i_mode : 0);
3194
3195         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3196                 if (open_flags & (O_CREAT | O_TRUNC)) {
3197                         ksmbd_debug(SMB,
3198                                     "User does not have write permission\n");
3199                         rc = -EACCES;
3200                         goto err_out;
3201                 }
3202         }
3203
3204         /*create file if not present */
3205         if (!file_present) {
3206                 rc = smb2_creat(work, &parent_path, &path, name, open_flags,
3207                                 posix_mode,
3208                                 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
3209                 if (rc) {
3210                         if (rc == -ENOENT) {
3211                                 rc = -EIO;
3212                                 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
3213                         }
3214                         goto err_out;
3215                 }
3216
3217                 created = true;
3218                 idmap = mnt_idmap(path.mnt);
3219                 if (ea_buf) {
3220                         if (le32_to_cpu(ea_buf->ccontext.DataLength) <
3221                             sizeof(struct smb2_ea_info)) {
3222                                 rc = -EINVAL;
3223                                 goto err_out;
3224                         }
3225
3226                         rc = smb2_set_ea(&ea_buf->ea,
3227                                          le32_to_cpu(ea_buf->ccontext.DataLength),
3228                                          &path, false);
3229                         if (rc == -EOPNOTSUPP)
3230                                 rc = 0;
3231                         else if (rc)
3232                                 goto err_out;
3233                 }
3234         } else if (!already_permitted) {
3235                 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
3236                  * because execute(search) permission on a parent directory,
3237                  * is already granted.
3238                  */
3239                 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
3240                         rc = inode_permission(idmap,
3241                                               d_inode(path.dentry),
3242                                               may_flags);
3243                         if (rc)
3244                                 goto err_out;
3245
3246                         if ((daccess & FILE_DELETE_LE) ||
3247                             (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3248                                 rc = inode_permission(idmap,
3249                                                       d_inode(path.dentry->d_parent),
3250                                                       MAY_EXEC | MAY_WRITE);
3251                                 if (rc)
3252                                         goto err_out;
3253                         }
3254                 }
3255         }
3256
3257         rc = ksmbd_query_inode_status(path.dentry->d_parent);
3258         if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
3259                 rc = -EBUSY;
3260                 goto err_out;
3261         }
3262
3263         rc = 0;
3264         filp = dentry_open(&path, open_flags, current_cred());
3265         if (IS_ERR(filp)) {
3266                 rc = PTR_ERR(filp);
3267                 pr_err("dentry open for dir failed, rc %d\n", rc);
3268                 goto err_out;
3269         }
3270
3271         if (file_present) {
3272                 if (!(open_flags & O_TRUNC))
3273                         file_info = FILE_OPENED;
3274                 else
3275                         file_info = FILE_OVERWRITTEN;
3276
3277                 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
3278                     FILE_SUPERSEDE_LE)
3279                         file_info = FILE_SUPERSEDED;
3280         } else if (open_flags & O_CREAT) {
3281                 file_info = FILE_CREATED;
3282         }
3283
3284         ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
3285
3286         /* Obtain Volatile-ID */
3287         fp = ksmbd_open_fd(work, filp);
3288         if (IS_ERR(fp)) {
3289                 fput(filp);
3290                 rc = PTR_ERR(fp);
3291                 fp = NULL;
3292                 goto err_out;
3293         }
3294
3295         /* Get Persistent-ID */
3296         ksmbd_open_durable_fd(fp);
3297         if (!has_file_id(fp->persistent_id)) {
3298                 rc = -ENOMEM;
3299                 goto err_out;
3300         }
3301
3302         fp->cdoption = req->CreateDisposition;
3303         fp->daccess = daccess;
3304         fp->saccess = req->ShareAccess;
3305         fp->coption = req->CreateOptions;
3306
3307         /* Set default windows and posix acls if creating new file */
3308         if (created) {
3309                 int posix_acl_rc;
3310                 struct inode *inode = d_inode(path.dentry);
3311
3312                 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
3313                                                            &path,
3314                                                            d_inode(path.dentry->d_parent));
3315                 if (posix_acl_rc)
3316                         ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
3317
3318                 if (test_share_config_flag(work->tcon->share_conf,
3319                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
3320                         rc = smb_inherit_dacl(conn, &path, sess->user->uid,
3321                                               sess->user->gid);
3322                 }
3323
3324                 if (rc) {
3325                         rc = smb2_create_sd_buffer(work, req, &path);
3326                         if (rc) {
3327                                 if (posix_acl_rc)
3328                                         ksmbd_vfs_set_init_posix_acl(idmap,
3329                                                                      &path);
3330
3331                                 if (test_share_config_flag(work->tcon->share_conf,
3332                                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
3333                                         struct smb_fattr fattr;
3334                                         struct smb_ntsd *pntsd;
3335                                         int pntsd_size, ace_num = 0;
3336
3337                                         ksmbd_acls_fattr(&fattr, idmap, inode);
3338                                         if (fattr.cf_acls)
3339                                                 ace_num = fattr.cf_acls->a_count;
3340                                         if (fattr.cf_dacls)
3341                                                 ace_num += fattr.cf_dacls->a_count;
3342
3343                                         pntsd = kmalloc(sizeof(struct smb_ntsd) +
3344                                                         sizeof(struct smb_sid) * 3 +
3345                                                         sizeof(struct smb_acl) +
3346                                                         sizeof(struct smb_ace) * ace_num * 2,
3347                                                         KSMBD_DEFAULT_GFP);
3348                                         if (!pntsd) {
3349                                                 posix_acl_release(fattr.cf_acls);
3350                                                 posix_acl_release(fattr.cf_dacls);
3351                                                 goto err_out;
3352                                         }
3353
3354                                         rc = build_sec_desc(idmap,
3355                                                             pntsd, NULL, 0,
3356                                                             OWNER_SECINFO |
3357                                                             GROUP_SECINFO |
3358                                                             DACL_SECINFO,
3359                                                             &pntsd_size, &fattr);
3360                                         posix_acl_release(fattr.cf_acls);
3361                                         posix_acl_release(fattr.cf_dacls);
3362                                         if (rc) {
3363                                                 kfree(pntsd);
3364                                                 goto err_out;
3365                                         }
3366
3367                                         rc = ksmbd_vfs_set_sd_xattr(conn,
3368                                                                     idmap,
3369                                                                     &path,
3370                                                                     pntsd,
3371                                                                     pntsd_size,
3372                                                                     false);
3373                                         kfree(pntsd);
3374                                         if (rc)
3375                                                 pr_err("failed to store ntacl in xattr : %d\n",
3376                                                        rc);
3377                                 }
3378                         }
3379                 }
3380                 rc = 0;
3381         }
3382
3383         if (stream_name) {
3384                 rc = smb2_set_stream_name_xattr(&path,
3385                                                 fp,
3386                                                 stream_name,
3387                                                 s_type);
3388                 if (rc)
3389                         goto err_out;
3390                 file_info = FILE_CREATED;
3391         }
3392
3393         fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3394                         FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3395
3396         /* fp should be searchable through ksmbd_inode.m_fp_list
3397          * after daccess, saccess, attrib_only, and stream are
3398          * initialized.
3399          */
3400         down_write(&fp->f_ci->m_lock);
3401         list_add(&fp->node, &fp->f_ci->m_fp_list);
3402         up_write(&fp->f_ci->m_lock);
3403
3404         /* Check delete pending among previous fp before oplock break */
3405         if (ksmbd_inode_pending_delete(fp)) {
3406                 rc = -EBUSY;
3407                 goto err_out;
3408         }
3409
3410         if (file_present || created)
3411                 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3412
3413         if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3414             !fp->attrib_only && !stream_name) {
3415                 smb_break_all_oplock(work, fp);
3416                 need_truncate = 1;
3417         }
3418
3419         share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3420         if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3421             (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3422              !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3423                 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3424                         rc = share_ret;
3425                         goto err_out1;
3426                 }
3427         } else {
3428                 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && lc) {
3429                         if (S_ISDIR(file_inode(filp)->i_mode)) {
3430                                 lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE;
3431                                 lc->is_dir = true;
3432                         }
3433
3434                         /*
3435                          * Compare parent lease using parent key. If there is no
3436                          * a lease that has same parent key, Send lease break
3437                          * notification.
3438                          */
3439                         smb_send_parent_lease_break_noti(fp, lc);
3440
3441                         req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3442                         ksmbd_debug(SMB,
3443                                     "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3444                                     name, req_op_level, lc->req_state);
3445                         rc = find_same_lease_key(sess, fp->f_ci, lc);
3446                         if (rc)
3447                                 goto err_out1;
3448                 } else if (open_flags == O_RDONLY &&
3449                            (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3450                             req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3451                         req_op_level = SMB2_OPLOCK_LEVEL_II;
3452
3453                 rc = smb_grant_oplock(work, req_op_level,
3454                                       fp->persistent_id, fp,
3455                                       le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3456                                       lc, share_ret);
3457                 if (rc < 0)
3458                         goto err_out1;
3459         }
3460
3461         if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3462                 ksmbd_fd_set_delete_on_close(fp, file_info);
3463
3464         if (need_truncate) {
3465                 rc = smb2_create_truncate(&fp->filp->f_path);
3466                 if (rc)
3467                         goto err_out1;
3468         }
3469
3470         if (req->CreateContextsOffset) {
3471                 struct create_alloc_size_req *az_req;
3472
3473                 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3474                                         SMB2_CREATE_ALLOCATION_SIZE, 4);
3475                 if (IS_ERR(az_req)) {
3476                         rc = PTR_ERR(az_req);
3477                         goto err_out1;
3478                 } else if (az_req) {
3479                         loff_t alloc_size;
3480                         int err;
3481
3482                         if (le16_to_cpu(az_req->ccontext.DataOffset) +
3483                             le32_to_cpu(az_req->ccontext.DataLength) <
3484                             sizeof(struct create_alloc_size_req)) {
3485                                 rc = -EINVAL;
3486                                 goto err_out1;
3487                         }
3488                         alloc_size = le64_to_cpu(az_req->AllocationSize);
3489                         ksmbd_debug(SMB,
3490                                     "request smb2 create allocate size : %llu\n",
3491                                     alloc_size);
3492                         smb_break_all_levII_oplock(work, fp, 1);
3493                         err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3494                                             alloc_size);
3495                         if (err < 0)
3496                                 ksmbd_debug(SMB,
3497                                             "vfs_fallocate is failed : %d\n",
3498                                             err);
3499                 }
3500
3501                 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
3502                 if (IS_ERR(context)) {
3503                         rc = PTR_ERR(context);
3504                         goto err_out1;
3505                 } else if (context) {
3506                         ksmbd_debug(SMB, "get query on disk id context\n");
3507                         query_disk_id = 1;
3508                 }
3509         }
3510
3511         rc = ksmbd_vfs_getattr(&path, &stat);
3512         if (rc)
3513                 goto err_out1;
3514
3515         if (stat.result_mask & STATX_BTIME)
3516                 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3517         else
3518                 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3519         if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3520                 fp->f_ci->m_fattr =
3521                         cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3522
3523         if (!created)
3524                 smb2_update_xattrs(tcon, &path, fp);
3525         else
3526                 smb2_new_xattrs(tcon, &path, fp);
3527
3528         memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3529
3530         if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) {
3531                 if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent &&
3532                     test_share_config_flag(work->tcon->share_conf,
3533                                            KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
3534                         fp->is_persistent = true;
3535                 else
3536                         fp->is_durable = true;
3537
3538                 if (dh_info.type == DURABLE_REQ_V2) {
3539                         memcpy(fp->create_guid, dh_info.CreateGuid,
3540                                         SMB2_CREATE_GUID_SIZE);
3541                         if (dh_info.timeout)
3542                                 fp->durable_timeout =
3543                                         min_t(unsigned int, dh_info.timeout,
3544                                               DURABLE_HANDLE_MAX_TIMEOUT);
3545                         else
3546                                 fp->durable_timeout = 60;
3547                 }
3548         }
3549
3550 reconnected_fp:
3551         rsp->StructureSize = cpu_to_le16(89);
3552         rcu_read_lock();
3553         opinfo = rcu_dereference(fp->f_opinfo);
3554         rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3555         rcu_read_unlock();
3556         rsp->Flags = 0;
3557         rsp->CreateAction = cpu_to_le32(file_info);
3558         rsp->CreationTime = cpu_to_le64(fp->create_time);
3559         time = ksmbd_UnixTimeToNT(stat.atime);
3560         rsp->LastAccessTime = cpu_to_le64(time);
3561         time = ksmbd_UnixTimeToNT(stat.mtime);
3562         rsp->LastWriteTime = cpu_to_le64(time);
3563         time = ksmbd_UnixTimeToNT(stat.ctime);
3564         rsp->ChangeTime = cpu_to_le64(time);
3565         rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3566                 cpu_to_le64(stat.blocks << 9);
3567         rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3568         rsp->FileAttributes = fp->f_ci->m_fattr;
3569
3570         rsp->Reserved2 = 0;
3571
3572         rsp->PersistentFileId = fp->persistent_id;
3573         rsp->VolatileFileId = fp->volatile_id;
3574
3575         rsp->CreateContextsOffset = 0;
3576         rsp->CreateContextsLength = 0;
3577         iov_len = offsetof(struct smb2_create_rsp, Buffer);
3578
3579         /* If lease is request send lease context response */
3580         if (opinfo && opinfo->is_lease) {
3581                 struct create_context *lease_ccontext;
3582
3583                 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3584                             name, opinfo->o_lease->state);
3585                 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3586
3587                 lease_ccontext = (struct create_context *)rsp->Buffer;
3588                 contxt_cnt++;
3589                 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3590                 le32_add_cpu(&rsp->CreateContextsLength,
3591                              conn->vals->create_lease_size);
3592                 iov_len += conn->vals->create_lease_size;
3593                 next_ptr = &lease_ccontext->Next;
3594                 next_off = conn->vals->create_lease_size;
3595         }
3596
3597         if (maximal_access_ctxt) {
3598                 struct create_context *mxac_ccontext;
3599
3600                 if (maximal_access == 0)
3601                         ksmbd_vfs_query_maximal_access(idmap,
3602                                                        path.dentry,
3603                                                        &maximal_access);
3604                 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3605                                 le32_to_cpu(rsp->CreateContextsLength));
3606                 contxt_cnt++;
3607                 create_mxac_rsp_buf(rsp->Buffer +
3608                                 le32_to_cpu(rsp->CreateContextsLength),
3609                                 le32_to_cpu(maximal_access));
3610                 le32_add_cpu(&rsp->CreateContextsLength,
3611                              conn->vals->create_mxac_size);
3612                 iov_len += conn->vals->create_mxac_size;
3613                 if (next_ptr)
3614                         *next_ptr = cpu_to_le32(next_off);
3615                 next_ptr = &mxac_ccontext->Next;
3616                 next_off = conn->vals->create_mxac_size;
3617         }
3618
3619         if (query_disk_id) {
3620                 struct create_context *disk_id_ccontext;
3621
3622                 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3623                                 le32_to_cpu(rsp->CreateContextsLength));
3624                 contxt_cnt++;
3625                 create_disk_id_rsp_buf(rsp->Buffer +
3626                                 le32_to_cpu(rsp->CreateContextsLength),
3627                                 stat.ino, tcon->id);
3628                 le32_add_cpu(&rsp->CreateContextsLength,
3629                              conn->vals->create_disk_id_size);
3630                 iov_len += conn->vals->create_disk_id_size;
3631                 if (next_ptr)
3632                         *next_ptr = cpu_to_le32(next_off);
3633                 next_ptr = &disk_id_ccontext->Next;
3634                 next_off = conn->vals->create_disk_id_size;
3635         }
3636
3637         if (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2) {
3638                 struct create_context *durable_ccontext;
3639
3640                 durable_ccontext = (struct create_context *)(rsp->Buffer +
3641                                 le32_to_cpu(rsp->CreateContextsLength));
3642                 contxt_cnt++;
3643                 if (dh_info.type == DURABLE_REQ) {
3644                         create_durable_rsp_buf(rsp->Buffer +
3645                                         le32_to_cpu(rsp->CreateContextsLength));
3646                         le32_add_cpu(&rsp->CreateContextsLength,
3647                                         conn->vals->create_durable_size);
3648                         iov_len += conn->vals->create_durable_size;
3649                 } else {
3650                         create_durable_v2_rsp_buf(rsp->Buffer +
3651                                         le32_to_cpu(rsp->CreateContextsLength),
3652                                         fp);
3653                         le32_add_cpu(&rsp->CreateContextsLength,
3654                                         conn->vals->create_durable_v2_size);
3655                         iov_len += conn->vals->create_durable_v2_size;
3656                 }
3657
3658                 if (next_ptr)
3659                         *next_ptr = cpu_to_le32(next_off);
3660                 next_ptr = &durable_ccontext->Next;
3661                 next_off = conn->vals->create_durable_size;
3662         }
3663
3664         if (posix_ctxt) {
3665                 contxt_cnt++;
3666                 create_posix_rsp_buf(rsp->Buffer +
3667                                 le32_to_cpu(rsp->CreateContextsLength),
3668                                 fp);
3669                 le32_add_cpu(&rsp->CreateContextsLength,
3670                              conn->vals->create_posix_size);
3671                 iov_len += conn->vals->create_posix_size;
3672                 if (next_ptr)
3673                         *next_ptr = cpu_to_le32(next_off);
3674         }
3675
3676         if (contxt_cnt > 0) {
3677                 rsp->CreateContextsOffset =
3678                         cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3679         }
3680
3681 err_out:
3682         if (rc && (file_present || created))
3683                 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3684
3685 err_out1:
3686         ksmbd_revert_fsids(work);
3687
3688 err_out2:
3689         if (!rc) {
3690                 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
3691                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
3692         }
3693         if (rc) {
3694                 if (rc == -EINVAL)
3695                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3696                 else if (rc == -EOPNOTSUPP)
3697                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3698                 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3699                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
3700                 else if (rc == -ENOENT)
3701                         rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3702                 else if (rc == -EPERM)
3703                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3704                 else if (rc == -EBUSY)
3705                         rsp->hdr.Status = STATUS_DELETE_PENDING;
3706                 else if (rc == -EBADF)
3707                         rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3708                 else if (rc == -ENOEXEC)
3709                         rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3710                 else if (rc == -ENXIO)
3711                         rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3712                 else if (rc == -EEXIST)
3713                         rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3714                 else if (rc == -EMFILE)
3715                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3716                 if (!rsp->hdr.Status)
3717                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3718
3719                 if (fp)
3720                         ksmbd_fd_put(work, fp);
3721                 smb2_set_err_rsp(work);
3722                 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3723         }
3724
3725         kfree(name);
3726         kfree(lc);
3727
3728         return rc;
3729 }
3730
3731 static int readdir_info_level_struct_sz(int info_level)
3732 {
3733         switch (info_level) {
3734         case FILE_FULL_DIRECTORY_INFORMATION:
3735                 return sizeof(struct file_full_directory_info);
3736         case FILE_BOTH_DIRECTORY_INFORMATION:
3737                 return sizeof(struct file_both_directory_info);
3738         case FILE_DIRECTORY_INFORMATION:
3739                 return sizeof(struct file_directory_info);
3740         case FILE_NAMES_INFORMATION:
3741                 return sizeof(struct file_names_info);
3742         case FILEID_FULL_DIRECTORY_INFORMATION:
3743                 return sizeof(struct file_id_full_dir_info);
3744         case FILEID_BOTH_DIRECTORY_INFORMATION:
3745                 return sizeof(struct file_id_both_directory_info);
3746         case SMB_FIND_FILE_POSIX_INFO:
3747                 return sizeof(struct smb2_posix_info);
3748         default:
3749                 return -EOPNOTSUPP;
3750         }
3751 }
3752
3753 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3754 {
3755         switch (info_level) {
3756         case FILE_FULL_DIRECTORY_INFORMATION:
3757         {
3758                 struct file_full_directory_info *ffdinfo;
3759
3760                 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3761                 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3762                 d_info->name = ffdinfo->FileName;
3763                 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3764                 return 0;
3765         }
3766         case FILE_BOTH_DIRECTORY_INFORMATION:
3767         {
3768                 struct file_both_directory_info *fbdinfo;
3769
3770                 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3771                 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3772                 d_info->name = fbdinfo->FileName;
3773                 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3774                 return 0;
3775         }
3776         case FILE_DIRECTORY_INFORMATION:
3777         {
3778                 struct file_directory_info *fdinfo;
3779
3780                 fdinfo = (struct file_directory_info *)d_info->rptr;
3781                 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3782                 d_info->name = fdinfo->FileName;
3783                 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3784                 return 0;
3785         }
3786         case FILE_NAMES_INFORMATION:
3787         {
3788                 struct file_names_info *fninfo;
3789
3790                 fninfo = (struct file_names_info *)d_info->rptr;
3791                 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3792                 d_info->name = fninfo->FileName;
3793                 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3794                 return 0;
3795         }
3796         case FILEID_FULL_DIRECTORY_INFORMATION:
3797         {
3798                 struct file_id_full_dir_info *dinfo;
3799
3800                 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3801                 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3802                 d_info->name = dinfo->FileName;
3803                 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3804                 return 0;
3805         }
3806         case FILEID_BOTH_DIRECTORY_INFORMATION:
3807         {
3808                 struct file_id_both_directory_info *fibdinfo;
3809
3810                 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3811                 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3812                 d_info->name = fibdinfo->FileName;
3813                 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3814                 return 0;
3815         }
3816         case SMB_FIND_FILE_POSIX_INFO:
3817         {
3818                 struct smb2_posix_info *posix_info;
3819
3820                 posix_info = (struct smb2_posix_info *)d_info->rptr;
3821                 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3822                 d_info->name = posix_info->name;
3823                 d_info->name_len = le32_to_cpu(posix_info->name_len);
3824                 return 0;
3825         }
3826         default:
3827                 return -EINVAL;
3828         }
3829 }
3830
3831 /**
3832  * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3833  * buffer
3834  * @conn:       connection instance
3835  * @info_level: smb information level
3836  * @d_info:     structure included variables for query dir
3837  * @ksmbd_kstat:        ksmbd wrapper of dirent stat information
3838  *
3839  * if directory has many entries, find first can't read it fully.
3840  * find next might be called multiple times to read remaining dir entries
3841  *
3842  * Return:      0 on success, otherwise error
3843  */
3844 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3845                                        struct ksmbd_dir_info *d_info,
3846                                        struct ksmbd_kstat *ksmbd_kstat)
3847 {
3848         int next_entry_offset = 0;
3849         char *conv_name;
3850         int conv_len;
3851         void *kstat;
3852         int struct_sz, rc = 0;
3853
3854         conv_name = ksmbd_convert_dir_info_name(d_info,
3855                                                 conn->local_nls,
3856                                                 &conv_len);
3857         if (!conv_name)
3858                 return -ENOMEM;
3859
3860         /* Somehow the name has only terminating NULL bytes */
3861         if (conv_len < 0) {
3862                 rc = -EINVAL;
3863                 goto free_conv_name;
3864         }
3865
3866         struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3867         next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3868         d_info->last_entry_off_align = next_entry_offset - struct_sz;
3869
3870         if (next_entry_offset > d_info->out_buf_len) {
3871                 d_info->out_buf_len = 0;
3872                 rc = -ENOSPC;
3873                 goto free_conv_name;
3874         }
3875
3876         kstat = d_info->wptr;
3877         if (info_level != FILE_NAMES_INFORMATION)
3878                 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3879
3880         switch (info_level) {
3881         case FILE_FULL_DIRECTORY_INFORMATION:
3882         {
3883                 struct file_full_directory_info *ffdinfo;
3884
3885                 ffdinfo = (struct file_full_directory_info *)kstat;
3886                 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3887                 ffdinfo->EaSize =
3888                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3889                 if (ffdinfo->EaSize)
3890                         ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3891                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3892                         ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3893                 memcpy(ffdinfo->FileName, conv_name, conv_len);
3894                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3895                 break;
3896         }
3897         case FILE_BOTH_DIRECTORY_INFORMATION:
3898         {
3899                 struct file_both_directory_info *fbdinfo;
3900
3901                 fbdinfo = (struct file_both_directory_info *)kstat;
3902                 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3903                 fbdinfo->EaSize =
3904                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3905                 if (fbdinfo->EaSize)
3906                         fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3907                 fbdinfo->ShortNameLength = 0;
3908                 fbdinfo->Reserved = 0;
3909                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3910                         fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3911                 memcpy(fbdinfo->FileName, conv_name, conv_len);
3912                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3913                 break;
3914         }
3915         case FILE_DIRECTORY_INFORMATION:
3916         {
3917                 struct file_directory_info *fdinfo;
3918
3919                 fdinfo = (struct file_directory_info *)kstat;
3920                 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3921                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3922                         fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3923                 memcpy(fdinfo->FileName, conv_name, conv_len);
3924                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3925                 break;
3926         }
3927         case FILE_NAMES_INFORMATION:
3928         {
3929                 struct file_names_info *fninfo;
3930
3931                 fninfo = (struct file_names_info *)kstat;
3932                 fninfo->FileNameLength = cpu_to_le32(conv_len);
3933                 memcpy(fninfo->FileName, conv_name, conv_len);
3934                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3935                 break;
3936         }
3937         case FILEID_FULL_DIRECTORY_INFORMATION:
3938         {
3939                 struct file_id_full_dir_info *dinfo;
3940
3941                 dinfo = (struct file_id_full_dir_info *)kstat;
3942                 dinfo->FileNameLength = cpu_to_le32(conv_len);
3943                 dinfo->EaSize =
3944                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3945                 if (dinfo->EaSize)
3946                         dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3947                 dinfo->Reserved = 0;
3948                 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3949                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3950                         dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3951                 memcpy(dinfo->FileName, conv_name, conv_len);
3952                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3953                 break;
3954         }
3955         case FILEID_BOTH_DIRECTORY_INFORMATION:
3956         {
3957                 struct file_id_both_directory_info *fibdinfo;
3958
3959                 fibdinfo = (struct file_id_both_directory_info *)kstat;
3960                 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3961                 fibdinfo->EaSize =
3962                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3963                 if (fibdinfo->EaSize)
3964                         fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3965                 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3966                 fibdinfo->ShortNameLength = 0;
3967                 fibdinfo->Reserved = 0;
3968                 fibdinfo->Reserved2 = cpu_to_le16(0);
3969                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3970                         fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3971                 memcpy(fibdinfo->FileName, conv_name, conv_len);
3972                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3973                 break;
3974         }
3975         case SMB_FIND_FILE_POSIX_INFO:
3976         {
3977                 struct smb2_posix_info *posix_info;
3978                 u64 time;
3979
3980                 posix_info = (struct smb2_posix_info *)kstat;
3981                 posix_info->Ignored = 0;
3982                 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3983                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3984                 posix_info->ChangeTime = cpu_to_le64(time);
3985                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3986                 posix_info->LastAccessTime = cpu_to_le64(time);
3987                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3988                 posix_info->LastWriteTime = cpu_to_le64(time);
3989                 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3990                 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3991                 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3992                 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3993                 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3994                 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3995                 posix_info->DosAttributes =
3996                         S_ISDIR(ksmbd_kstat->kstat->mode) ?
3997                                 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3998                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3999                         posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
4000                 /*
4001                  * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
4002                  * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
4003                  *                sub_auth(4 * 1(num_subauth)) + RID(4).
4004                  */
4005                 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
4006                           SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
4007                 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
4008                           SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
4009                 memcpy(posix_info->name, conv_name, conv_len);
4010                 posix_info->name_len = cpu_to_le32(conv_len);
4011                 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
4012                 break;
4013         }
4014
4015         } /* switch (info_level) */
4016
4017         d_info->last_entry_offset = d_info->data_count;
4018         d_info->data_count += next_entry_offset;
4019         d_info->out_buf_len -= next_entry_offset;
4020         d_info->wptr += next_entry_offset;
4021
4022         ksmbd_debug(SMB,
4023                     "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
4024                     info_level, d_info->out_buf_len,
4025                     next_entry_offset, d_info->data_count);
4026
4027 free_conv_name:
4028         kfree(conv_name);
4029         return rc;
4030 }
4031
4032 struct smb2_query_dir_private {
4033         struct ksmbd_work       *work;
4034         char                    *search_pattern;
4035         struct ksmbd_file       *dir_fp;
4036
4037         struct ksmbd_dir_info   *d_info;
4038         int                     info_level;
4039 };
4040
4041 static void lock_dir(struct ksmbd_file *dir_fp)
4042 {
4043         struct dentry *dir = dir_fp->filp->f_path.dentry;
4044
4045         inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
4046 }
4047
4048 static void unlock_dir(struct ksmbd_file *dir_fp)
4049 {
4050         struct dentry *dir = dir_fp->filp->f_path.dentry;
4051
4052         inode_unlock(d_inode(dir));
4053 }
4054
4055 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
4056 {
4057         struct mnt_idmap        *idmap = file_mnt_idmap(priv->dir_fp->filp);
4058         struct kstat            kstat;
4059         struct ksmbd_kstat      ksmbd_kstat;
4060         int                     rc;
4061         int                     i;
4062
4063         for (i = 0; i < priv->d_info->num_entry; i++) {
4064                 struct dentry *dent;
4065
4066                 if (dentry_name(priv->d_info, priv->info_level))
4067                         return -EINVAL;
4068
4069                 lock_dir(priv->dir_fp);
4070                 dent = lookup_one(idmap, priv->d_info->name,
4071                                   priv->dir_fp->filp->f_path.dentry,
4072                                   priv->d_info->name_len);
4073                 unlock_dir(priv->dir_fp);
4074
4075                 if (IS_ERR(dent)) {
4076                         ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
4077                                     priv->d_info->name,
4078                                     PTR_ERR(dent));
4079                         continue;
4080                 }
4081                 if (unlikely(d_is_negative(dent))) {
4082                         dput(dent);
4083                         ksmbd_debug(SMB, "Negative dentry `%s'\n",
4084                                     priv->d_info->name);
4085                         continue;
4086                 }
4087
4088                 ksmbd_kstat.kstat = &kstat;
4089                 if (priv->info_level != FILE_NAMES_INFORMATION) {
4090                         rc = ksmbd_vfs_fill_dentry_attrs(priv->work,
4091                                                          idmap,
4092                                                          dent,
4093                                                          &ksmbd_kstat);
4094                         if (rc) {
4095                                 dput(dent);
4096                                 continue;
4097                         }
4098                 }
4099
4100                 rc = smb2_populate_readdir_entry(priv->work->conn,
4101                                                  priv->info_level,
4102                                                  priv->d_info,
4103                                                  &ksmbd_kstat);
4104                 dput(dent);
4105                 if (rc)
4106                         return rc;
4107         }
4108         return 0;
4109 }
4110
4111 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
4112                                    int info_level)
4113 {
4114         int struct_sz;
4115         int conv_len;
4116         int next_entry_offset;
4117
4118         struct_sz = readdir_info_level_struct_sz(info_level);
4119         if (struct_sz == -EOPNOTSUPP)
4120                 return -EOPNOTSUPP;
4121
4122         conv_len = (d_info->name_len + 1) * 2;
4123         next_entry_offset = ALIGN(struct_sz + conv_len,
4124                                   KSMBD_DIR_INFO_ALIGNMENT);
4125
4126         if (next_entry_offset > d_info->out_buf_len) {
4127                 d_info->out_buf_len = 0;
4128                 return -ENOSPC;
4129         }
4130
4131         switch (info_level) {
4132         case FILE_FULL_DIRECTORY_INFORMATION:
4133         {
4134                 struct file_full_directory_info *ffdinfo;
4135
4136                 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
4137                 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
4138                 ffdinfo->FileName[d_info->name_len] = 0x00;
4139                 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4140                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4141                 break;
4142         }
4143         case FILE_BOTH_DIRECTORY_INFORMATION:
4144         {
4145                 struct file_both_directory_info *fbdinfo;
4146
4147                 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
4148                 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
4149                 fbdinfo->FileName[d_info->name_len] = 0x00;
4150                 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4151                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4152                 break;
4153         }
4154         case FILE_DIRECTORY_INFORMATION:
4155         {
4156                 struct file_directory_info *fdinfo;
4157
4158                 fdinfo = (struct file_directory_info *)d_info->wptr;
4159                 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
4160                 fdinfo->FileName[d_info->name_len] = 0x00;
4161                 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4162                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4163                 break;
4164         }
4165         case FILE_NAMES_INFORMATION:
4166         {
4167                 struct file_names_info *fninfo;
4168
4169                 fninfo = (struct file_names_info *)d_info->wptr;
4170                 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
4171                 fninfo->FileName[d_info->name_len] = 0x00;
4172                 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
4173                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4174                 break;
4175         }
4176         case FILEID_FULL_DIRECTORY_INFORMATION:
4177         {
4178                 struct file_id_full_dir_info *dinfo;
4179
4180                 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
4181                 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
4182                 dinfo->FileName[d_info->name_len] = 0x00;
4183                 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4184                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4185                 break;
4186         }
4187         case FILEID_BOTH_DIRECTORY_INFORMATION:
4188         {
4189                 struct file_id_both_directory_info *fibdinfo;
4190
4191                 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
4192                 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
4193                 fibdinfo->FileName[d_info->name_len] = 0x00;
4194                 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4195                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4196                 break;
4197         }
4198         case SMB_FIND_FILE_POSIX_INFO:
4199         {
4200                 struct smb2_posix_info *posix_info;
4201
4202                 posix_info = (struct smb2_posix_info *)d_info->wptr;
4203                 memcpy(posix_info->name, d_info->name, d_info->name_len);
4204                 posix_info->name[d_info->name_len] = 0x00;
4205                 posix_info->name_len = cpu_to_le32(d_info->name_len);
4206                 posix_info->NextEntryOffset =
4207                         cpu_to_le32(next_entry_offset);
4208                 break;
4209         }
4210         } /* switch (info_level) */
4211
4212         d_info->num_entry++;
4213         d_info->out_buf_len -= next_entry_offset;
4214         d_info->wptr += next_entry_offset;
4215         return 0;
4216 }
4217
4218 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
4219                        loff_t offset, u64 ino, unsigned int d_type)
4220 {
4221         struct ksmbd_readdir_data       *buf;
4222         struct smb2_query_dir_private   *priv;
4223         struct ksmbd_dir_info           *d_info;
4224         int                             rc;
4225
4226         buf     = container_of(ctx, struct ksmbd_readdir_data, ctx);
4227         priv    = buf->private;
4228         d_info  = priv->d_info;
4229
4230         /* dot and dotdot entries are already reserved */
4231         if (!strcmp(".", name) || !strcmp("..", name))
4232                 return true;
4233         d_info->num_scan++;
4234         if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
4235                 return true;
4236         if (!match_pattern(name, namlen, priv->search_pattern))
4237                 return true;
4238
4239         d_info->name            = name;
4240         d_info->name_len        = namlen;
4241         rc = reserve_populate_dentry(d_info, priv->info_level);
4242         if (rc)
4243                 return false;
4244         if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
4245                 d_info->out_buf_len = 0;
4246         return true;
4247 }
4248
4249 static int verify_info_level(int info_level)
4250 {
4251         switch (info_level) {
4252         case FILE_FULL_DIRECTORY_INFORMATION:
4253         case FILE_BOTH_DIRECTORY_INFORMATION:
4254         case FILE_DIRECTORY_INFORMATION:
4255         case FILE_NAMES_INFORMATION:
4256         case FILEID_FULL_DIRECTORY_INFORMATION:
4257         case FILEID_BOTH_DIRECTORY_INFORMATION:
4258         case SMB_FIND_FILE_POSIX_INFO:
4259                 break;
4260         default:
4261                 return -EOPNOTSUPP;
4262         }
4263
4264         return 0;
4265 }
4266
4267 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
4268 {
4269         int free_len;
4270
4271         free_len = (int)(work->response_sz -
4272                 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
4273         return free_len;
4274 }
4275
4276 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
4277                                      unsigned short hdr2_len,
4278                                      unsigned int out_buf_len)
4279 {
4280         int free_len;
4281
4282         if (out_buf_len > work->conn->vals->max_trans_size)
4283                 return -EINVAL;
4284
4285         free_len = smb2_resp_buf_len(work, hdr2_len);
4286         if (free_len < 0)
4287                 return -EINVAL;
4288
4289         return min_t(int, out_buf_len, free_len);
4290 }
4291
4292 int smb2_query_dir(struct ksmbd_work *work)
4293 {
4294         struct ksmbd_conn *conn = work->conn;
4295         struct smb2_query_directory_req *req;
4296         struct smb2_query_directory_rsp *rsp;
4297         struct ksmbd_share_config *share = work->tcon->share_conf;
4298         struct ksmbd_file *dir_fp = NULL;
4299         struct ksmbd_dir_info d_info;
4300         int rc = 0;
4301         char *srch_ptr = NULL;
4302         unsigned char srch_flag;
4303         int buffer_sz;
4304         struct smb2_query_dir_private query_dir_private = {NULL, };
4305
4306         ksmbd_debug(SMB, "Received smb2 query directory request\n");
4307
4308         WORK_BUFFERS(work, req, rsp);
4309
4310         if (ksmbd_override_fsids(work)) {
4311                 rsp->hdr.Status = STATUS_NO_MEMORY;
4312                 smb2_set_err_rsp(work);
4313                 return -ENOMEM;
4314         }
4315
4316         rc = verify_info_level(req->FileInformationClass);
4317         if (rc) {
4318                 rc = -EFAULT;
4319                 goto err_out2;
4320         }
4321
4322         dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
4323         if (!dir_fp) {
4324                 rc = -EBADF;
4325                 goto err_out2;
4326         }
4327
4328         if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
4329             inode_permission(file_mnt_idmap(dir_fp->filp),
4330                              file_inode(dir_fp->filp),
4331                              MAY_READ | MAY_EXEC)) {
4332                 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
4333                 rc = -EACCES;
4334                 goto err_out2;
4335         }
4336
4337         if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
4338                 pr_err("can't do query dir for a file\n");
4339                 rc = -EINVAL;
4340                 goto err_out2;
4341         }
4342
4343         srch_flag = req->Flags;
4344         srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset),
4345                                           le16_to_cpu(req->FileNameLength), 1,
4346                                           conn->local_nls);
4347         if (IS_ERR(srch_ptr)) {
4348                 ksmbd_debug(SMB, "Search Pattern not found\n");
4349                 rc = -EINVAL;
4350                 goto err_out2;
4351         } else {
4352                 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
4353         }
4354
4355         if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
4356                 ksmbd_debug(SMB, "Restart directory scan\n");
4357                 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
4358         }
4359
4360         memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
4361         d_info.wptr = (char *)rsp->Buffer;
4362         d_info.rptr = (char *)rsp->Buffer;
4363         d_info.out_buf_len =
4364                 smb2_calc_max_out_buf_len(work, 8,
4365                                           le32_to_cpu(req->OutputBufferLength));
4366         if (d_info.out_buf_len < 0) {
4367                 rc = -EINVAL;
4368                 goto err_out;
4369         }
4370         d_info.flags = srch_flag;
4371
4372         /*
4373          * reserve dot and dotdot entries in head of buffer
4374          * in first response
4375          */
4376         rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
4377                                                dir_fp, &d_info, srch_ptr,
4378                                                smb2_populate_readdir_entry);
4379         if (rc == -ENOSPC)
4380                 rc = 0;
4381         else if (rc)
4382                 goto err_out;
4383
4384         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
4385                 d_info.hide_dot_file = true;
4386
4387         buffer_sz                               = d_info.out_buf_len;
4388         d_info.rptr                             = d_info.wptr;
4389         query_dir_private.work                  = work;
4390         query_dir_private.search_pattern        = srch_ptr;
4391         query_dir_private.dir_fp                = dir_fp;
4392         query_dir_private.d_info                = &d_info;
4393         query_dir_private.info_level            = req->FileInformationClass;
4394         dir_fp->readdir_data.private            = &query_dir_private;
4395         set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
4396 again:
4397         d_info.num_scan = 0;
4398         rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
4399         /*
4400          * num_entry can be 0 if the directory iteration stops before reaching
4401          * the end of the directory and no file is matched with the search
4402          * pattern.
4403          */
4404         if (rc >= 0 && !d_info.num_entry && d_info.num_scan &&
4405             d_info.out_buf_len > 0)
4406                 goto again;
4407         /*
4408          * req->OutputBufferLength is too small to contain even one entry.
4409          * In this case, it immediately returns OutputBufferLength 0 to client.
4410          */
4411         if (!d_info.out_buf_len && !d_info.num_entry)
4412                 goto no_buf_len;
4413         if (rc > 0 || rc == -ENOSPC)
4414                 rc = 0;
4415         else if (rc)
4416                 goto err_out;
4417
4418         d_info.wptr = d_info.rptr;
4419         d_info.out_buf_len = buffer_sz;
4420         rc = process_query_dir_entries(&query_dir_private);
4421         if (rc)
4422                 goto err_out;
4423
4424         if (!d_info.data_count && d_info.out_buf_len >= 0) {
4425                 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
4426                         rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4427                 } else {
4428                         dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
4429                         rsp->hdr.Status = STATUS_NO_MORE_FILES;
4430                 }
4431                 rsp->StructureSize = cpu_to_le16(9);
4432                 rsp->OutputBufferOffset = cpu_to_le16(0);
4433                 rsp->OutputBufferLength = cpu_to_le32(0);
4434                 rsp->Buffer[0] = 0;
4435                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4436                                        offsetof(struct smb2_query_directory_rsp, Buffer)
4437                                        + 1);
4438                 if (rc)
4439                         goto err_out;
4440         } else {
4441 no_buf_len:
4442                 ((struct file_directory_info *)
4443                 ((char *)rsp->Buffer + d_info.last_entry_offset))
4444                 ->NextEntryOffset = 0;
4445                 if (d_info.data_count >= d_info.last_entry_off_align)
4446                         d_info.data_count -= d_info.last_entry_off_align;
4447
4448                 rsp->StructureSize = cpu_to_le16(9);
4449                 rsp->OutputBufferOffset = cpu_to_le16(72);
4450                 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4451                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4452                                        offsetof(struct smb2_query_directory_rsp, Buffer) +
4453                                        d_info.data_count);
4454                 if (rc)
4455                         goto err_out;
4456         }
4457
4458         kfree(srch_ptr);
4459         ksmbd_fd_put(work, dir_fp);
4460         ksmbd_revert_fsids(work);
4461         return 0;
4462
4463 err_out:
4464         pr_err("error while processing smb2 query dir rc = %d\n", rc);
4465         kfree(srch_ptr);
4466
4467 err_out2:
4468         if (rc == -EINVAL)
4469                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4470         else if (rc == -EACCES)
4471                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4472         else if (rc == -ENOENT)
4473                 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4474         else if (rc == -EBADF)
4475                 rsp->hdr.Status = STATUS_FILE_CLOSED;
4476         else if (rc == -ENOMEM)
4477                 rsp->hdr.Status = STATUS_NO_MEMORY;
4478         else if (rc == -EFAULT)
4479                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4480         else if (rc == -EIO)
4481                 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4482         if (!rsp->hdr.Status)
4483                 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4484
4485         smb2_set_err_rsp(work);
4486         ksmbd_fd_put(work, dir_fp);
4487         ksmbd_revert_fsids(work);
4488         return 0;
4489 }
4490
4491 /**
4492  * buffer_check_err() - helper function to check buffer errors
4493  * @reqOutputBufferLength:      max buffer length expected in command response
4494  * @rsp:                query info response buffer contains output buffer length
4495  * @rsp_org:            base response buffer pointer in case of chained response
4496  *
4497  * Return:      0 on success, otherwise error
4498  */
4499 static int buffer_check_err(int reqOutputBufferLength,
4500                             struct smb2_query_info_rsp *rsp,
4501                             void *rsp_org)
4502 {
4503         if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4504                 pr_err("Invalid Buffer Size Requested\n");
4505                 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4506                 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4507                 return -EINVAL;
4508         }
4509         return 0;
4510 }
4511
4512 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4513                                    void *rsp_org)
4514 {
4515         struct smb2_file_standard_info *sinfo;
4516
4517         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4518
4519         sinfo->AllocationSize = cpu_to_le64(4096);
4520         sinfo->EndOfFile = cpu_to_le64(0);
4521         sinfo->NumberOfLinks = cpu_to_le32(1);
4522         sinfo->DeletePending = 1;
4523         sinfo->Directory = 0;
4524         rsp->OutputBufferLength =
4525                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4526 }
4527
4528 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4529                                    void *rsp_org)
4530 {
4531         struct smb2_file_internal_info *file_info;
4532
4533         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4534
4535         /* any unique number */
4536         file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4537         rsp->OutputBufferLength =
4538                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4539 }
4540
4541 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4542                                    struct smb2_query_info_req *req,
4543                                    struct smb2_query_info_rsp *rsp,
4544                                    void *rsp_org)
4545 {
4546         u64 id;
4547         int rc;
4548
4549         /*
4550          * Windows can sometime send query file info request on
4551          * pipe without opening it, checking error condition here
4552          */
4553         id = req->VolatileFileId;
4554         if (!ksmbd_session_rpc_method(sess, id))
4555                 return -ENOENT;
4556
4557         ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4558                     req->FileInfoClass, req->VolatileFileId);
4559
4560         switch (req->FileInfoClass) {
4561         case FILE_STANDARD_INFORMATION:
4562                 get_standard_info_pipe(rsp, rsp_org);
4563                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4564                                       rsp, rsp_org);
4565                 break;
4566         case FILE_INTERNAL_INFORMATION:
4567                 get_internal_info_pipe(rsp, id, rsp_org);
4568                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4569                                       rsp, rsp_org);
4570                 break;
4571         default:
4572                 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4573                             req->FileInfoClass);
4574                 rc = -EOPNOTSUPP;
4575         }
4576         return rc;
4577 }
4578
4579 /**
4580  * smb2_get_ea() - handler for smb2 get extended attribute command
4581  * @work:       smb work containing query info command buffer
4582  * @fp:         ksmbd_file pointer
4583  * @req:        get extended attribute request
4584  * @rsp:        response buffer pointer
4585  * @rsp_org:    base response buffer pointer in case of chained response
4586  *
4587  * Return:      0 on success, otherwise error
4588  */
4589 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4590                        struct smb2_query_info_req *req,
4591                        struct smb2_query_info_rsp *rsp, void *rsp_org)
4592 {
4593         struct smb2_ea_info *eainfo, *prev_eainfo;
4594         char *name, *ptr, *xattr_list = NULL, *buf;
4595         int rc, name_len, value_len, xattr_list_len, idx;
4596         ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4597         struct smb2_ea_info_req *ea_req = NULL;
4598         const struct path *path;
4599         struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4600
4601         if (!(fp->daccess & FILE_READ_EA_LE)) {
4602                 pr_err("Not permitted to read ext attr : 0x%x\n",
4603                        fp->daccess);
4604                 return -EACCES;
4605         }
4606
4607         path = &fp->filp->f_path;
4608         /* single EA entry is requested with given user.* name */
4609         if (req->InputBufferLength) {
4610                 if (le32_to_cpu(req->InputBufferLength) <=
4611                     sizeof(struct smb2_ea_info_req))
4612                         return -EINVAL;
4613
4614                 ea_req = (struct smb2_ea_info_req *)((char *)req +
4615                                                      le16_to_cpu(req->InputBufferOffset));
4616         } else {
4617                 /* need to send all EAs, if no specific EA is requested*/
4618                 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4619                         ksmbd_debug(SMB,
4620                                     "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4621                                     le32_to_cpu(req->Flags));
4622         }
4623
4624         buf_free_len =
4625                 smb2_calc_max_out_buf_len(work, 8,
4626                                           le32_to_cpu(req->OutputBufferLength));
4627         if (buf_free_len < 0)
4628                 return -EINVAL;
4629
4630         rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4631         if (rc < 0) {
4632                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4633                 goto out;
4634         } else if (!rc) { /* there is no EA in the file */
4635                 ksmbd_debug(SMB, "no ea data in the file\n");
4636                 goto done;
4637         }
4638         xattr_list_len = rc;
4639
4640         ptr = (char *)rsp->Buffer;
4641         eainfo = (struct smb2_ea_info *)ptr;
4642         prev_eainfo = eainfo;
4643         idx = 0;
4644
4645         while (idx < xattr_list_len) {
4646                 name = xattr_list + idx;
4647                 name_len = strlen(name);
4648
4649                 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4650                 idx += name_len + 1;
4651
4652                 /*
4653                  * CIFS does not support EA other than user.* namespace,
4654                  * still keep the framework generic, to list other attrs
4655                  * in future.
4656                  */
4657                 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4658                         continue;
4659
4660                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4661                              STREAM_PREFIX_LEN))
4662                         continue;
4663
4664                 if (req->InputBufferLength &&
4665                     strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4666                             ea_req->EaNameLength))
4667                         continue;
4668
4669                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4670                              DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4671                         continue;
4672
4673                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4674                         name_len -= XATTR_USER_PREFIX_LEN;
4675
4676                 ptr = eainfo->name + name_len + 1;
4677                 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4678                                 name_len + 1);
4679                 /* bailout if xattr can't fit in buf_free_len */
4680                 value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
4681                                                name, &buf);
4682                 if (value_len <= 0) {
4683                         rc = -ENOENT;
4684                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
4685                         goto out;
4686                 }
4687
4688                 buf_free_len -= value_len;
4689                 if (buf_free_len < 0) {
4690                         kfree(buf);
4691                         break;
4692                 }
4693
4694                 memcpy(ptr, buf, value_len);
4695                 kfree(buf);
4696
4697                 ptr += value_len;
4698                 eainfo->Flags = 0;
4699                 eainfo->EaNameLength = name_len;
4700
4701                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4702                         memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4703                                name_len);
4704                 else
4705                         memcpy(eainfo->name, name, name_len);
4706
4707                 eainfo->name[name_len] = '\0';
4708                 eainfo->EaValueLength = cpu_to_le16(value_len);
4709                 next_offset = offsetof(struct smb2_ea_info, name) +
4710                         name_len + 1 + value_len;
4711
4712                 /* align next xattr entry at 4 byte bundary */
4713                 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4714                 if (alignment_bytes) {
4715                         memset(ptr, '\0', alignment_bytes);
4716                         ptr += alignment_bytes;
4717                         next_offset += alignment_bytes;
4718                         buf_free_len -= alignment_bytes;
4719                 }
4720                 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4721                 prev_eainfo = eainfo;
4722                 eainfo = (struct smb2_ea_info *)ptr;
4723                 rsp_data_cnt += next_offset;
4724
4725                 if (req->InputBufferLength) {
4726                         ksmbd_debug(SMB, "single entry requested\n");
4727                         break;
4728                 }
4729         }
4730
4731         /* no more ea entries */
4732         prev_eainfo->NextEntryOffset = 0;
4733 done:
4734         rc = 0;
4735         if (rsp_data_cnt == 0)
4736                 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4737         rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4738 out:
4739         kvfree(xattr_list);
4740         return rc;
4741 }
4742
4743 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4744                                  struct ksmbd_file *fp, void *rsp_org)
4745 {
4746         struct smb2_file_access_info *file_info;
4747
4748         file_info = (struct smb2_file_access_info *)rsp->Buffer;
4749         file_info->AccessFlags = fp->daccess;
4750         rsp->OutputBufferLength =
4751                 cpu_to_le32(sizeof(struct smb2_file_access_info));
4752 }
4753
4754 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4755                                struct ksmbd_file *fp, void *rsp_org)
4756 {
4757         struct smb2_file_basic_info *basic_info;
4758         struct kstat stat;
4759         u64 time;
4760         int ret;
4761
4762         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4763                 pr_err("no right to read the attributes : 0x%x\n",
4764                        fp->daccess);
4765                 return -EACCES;
4766         }
4767
4768         ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4769                           AT_STATX_SYNC_AS_STAT);
4770         if (ret)
4771                 return ret;
4772
4773         basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4774         basic_info->CreationTime = cpu_to_le64(fp->create_time);
4775         time = ksmbd_UnixTimeToNT(stat.atime);
4776         basic_info->LastAccessTime = cpu_to_le64(time);
4777         time = ksmbd_UnixTimeToNT(stat.mtime);
4778         basic_info->LastWriteTime = cpu_to_le64(time);
4779         time = ksmbd_UnixTimeToNT(stat.ctime);
4780         basic_info->ChangeTime = cpu_to_le64(time);
4781         basic_info->Attributes = fp->f_ci->m_fattr;
4782         basic_info->Pad1 = 0;
4783         rsp->OutputBufferLength =
4784                 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4785         return 0;
4786 }
4787
4788 static int get_file_standard_info(struct smb2_query_info_rsp *rsp,
4789                                   struct ksmbd_file *fp, void *rsp_org)
4790 {
4791         struct smb2_file_standard_info *sinfo;
4792         unsigned int delete_pending;
4793         struct kstat stat;
4794         int ret;
4795
4796         ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4797                           AT_STATX_SYNC_AS_STAT);
4798         if (ret)
4799                 return ret;
4800
4801         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4802         delete_pending = ksmbd_inode_pending_delete(fp);
4803
4804         sinfo->AllocationSize = cpu_to_le64(stat.blocks << 9);
4805         sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4806         sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4807         sinfo->DeletePending = delete_pending;
4808         sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4809         rsp->OutputBufferLength =
4810                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4811
4812         return 0;
4813 }
4814
4815 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4816                                     void *rsp_org)
4817 {
4818         struct smb2_file_alignment_info *file_info;
4819
4820         file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4821         file_info->AlignmentRequirement = 0;
4822         rsp->OutputBufferLength =
4823                 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4824 }
4825
4826 static int get_file_all_info(struct ksmbd_work *work,
4827                              struct smb2_query_info_rsp *rsp,
4828                              struct ksmbd_file *fp,
4829                              void *rsp_org)
4830 {
4831         struct ksmbd_conn *conn = work->conn;
4832         struct smb2_file_all_info *file_info;
4833         unsigned int delete_pending;
4834         struct kstat stat;
4835         int conv_len;
4836         char *filename;
4837         u64 time;
4838         int ret;
4839
4840         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4841                 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4842                             fp->daccess);
4843                 return -EACCES;
4844         }
4845
4846         filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4847         if (IS_ERR(filename))
4848                 return PTR_ERR(filename);
4849
4850         ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4851                           AT_STATX_SYNC_AS_STAT);
4852         if (ret)
4853                 return ret;
4854
4855         ksmbd_debug(SMB, "filename = %s\n", filename);
4856         delete_pending = ksmbd_inode_pending_delete(fp);
4857         file_info = (struct smb2_file_all_info *)rsp->Buffer;
4858
4859         file_info->CreationTime = cpu_to_le64(fp->create_time);
4860         time = ksmbd_UnixTimeToNT(stat.atime);
4861         file_info->LastAccessTime = cpu_to_le64(time);
4862         time = ksmbd_UnixTimeToNT(stat.mtime);
4863         file_info->LastWriteTime = cpu_to_le64(time);
4864         time = ksmbd_UnixTimeToNT(stat.ctime);
4865         file_info->ChangeTime = cpu_to_le64(time);
4866         file_info->Attributes = fp->f_ci->m_fattr;
4867         file_info->Pad1 = 0;
4868         file_info->AllocationSize =
4869                 cpu_to_le64(stat.blocks << 9);
4870         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4871         file_info->NumberOfLinks =
4872                         cpu_to_le32(get_nlink(&stat) - delete_pending);
4873         file_info->DeletePending = delete_pending;
4874         file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4875         file_info->Pad2 = 0;
4876         file_info->IndexNumber = cpu_to_le64(stat.ino);
4877         file_info->EASize = 0;
4878         file_info->AccessFlags = fp->daccess;
4879         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4880         file_info->Mode = fp->coption;
4881         file_info->AlignmentRequirement = 0;
4882         conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4883                                      PATH_MAX, conn->local_nls, 0);
4884         conv_len *= 2;
4885         file_info->FileNameLength = cpu_to_le32(conv_len);
4886         rsp->OutputBufferLength =
4887                 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4888         kfree(filename);
4889         return 0;
4890 }
4891
4892 static void get_file_alternate_info(struct ksmbd_work *work,
4893                                     struct smb2_query_info_rsp *rsp,
4894                                     struct ksmbd_file *fp,
4895                                     void *rsp_org)
4896 {
4897         struct ksmbd_conn *conn = work->conn;
4898         struct smb2_file_alt_name_info *file_info;
4899         struct dentry *dentry = fp->filp->f_path.dentry;
4900         int conv_len;
4901
4902         spin_lock(&dentry->d_lock);
4903         file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4904         conv_len = ksmbd_extract_shortname(conn,
4905                                            dentry->d_name.name,
4906                                            file_info->FileName);
4907         spin_unlock(&dentry->d_lock);
4908         file_info->FileNameLength = cpu_to_le32(conv_len);
4909         rsp->OutputBufferLength =
4910                 cpu_to_le32(struct_size(file_info, FileName, conv_len));
4911 }
4912
4913 static int get_file_stream_info(struct ksmbd_work *work,
4914                                 struct smb2_query_info_rsp *rsp,
4915                                 struct ksmbd_file *fp,
4916                                 void *rsp_org)
4917 {
4918         struct ksmbd_conn *conn = work->conn;
4919         struct smb2_file_stream_info *file_info;
4920         char *stream_name, *xattr_list = NULL, *stream_buf;
4921         struct kstat stat;
4922         const struct path *path = &fp->filp->f_path;
4923         ssize_t xattr_list_len;
4924         int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4925         int buf_free_len;
4926         struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4927         int ret;
4928
4929         ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4930                           AT_STATX_SYNC_AS_STAT);
4931         if (ret)
4932                 return ret;
4933
4934         file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4935
4936         buf_free_len =
4937                 smb2_calc_max_out_buf_len(work, 8,
4938                                           le32_to_cpu(req->OutputBufferLength));
4939         if (buf_free_len < 0)
4940                 goto out;
4941
4942         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4943         if (xattr_list_len < 0) {
4944                 goto out;
4945         } else if (!xattr_list_len) {
4946                 ksmbd_debug(SMB, "empty xattr in the file\n");
4947                 goto out;
4948         }
4949
4950         while (idx < xattr_list_len) {
4951                 stream_name = xattr_list + idx;
4952                 streamlen = strlen(stream_name);
4953                 idx += streamlen + 1;
4954
4955                 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4956
4957                 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4958                             STREAM_PREFIX, STREAM_PREFIX_LEN))
4959                         continue;
4960
4961                 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4962                                 STREAM_PREFIX_LEN);
4963                 streamlen = stream_name_len;
4964
4965                 /* plus : size */
4966                 streamlen += 1;
4967                 stream_buf = kmalloc(streamlen + 1, KSMBD_DEFAULT_GFP);
4968                 if (!stream_buf)
4969                         break;
4970
4971                 streamlen = snprintf(stream_buf, streamlen + 1,
4972                                      ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4973
4974                 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4975                 if (next > buf_free_len) {
4976                         kfree(stream_buf);
4977                         break;
4978                 }
4979
4980                 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4981                 streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
4982                                                stream_buf, streamlen,
4983                                                conn->local_nls, 0);
4984                 streamlen *= 2;
4985                 kfree(stream_buf);
4986                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4987                 file_info->StreamSize = cpu_to_le64(stream_name_len);
4988                 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4989
4990                 nbytes += next;
4991                 buf_free_len -= next;
4992                 file_info->NextEntryOffset = cpu_to_le32(next);
4993         }
4994
4995 out:
4996         if (!S_ISDIR(stat.mode) &&
4997             buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4998                 file_info = (struct smb2_file_stream_info *)
4999                         &rsp->Buffer[nbytes];
5000                 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
5001                                               "::$DATA", 7, conn->local_nls, 0);
5002                 streamlen *= 2;
5003                 file_info->StreamNameLength = cpu_to_le32(streamlen);
5004                 file_info->StreamSize = cpu_to_le64(stat.size);
5005                 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
5006                 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
5007         }
5008
5009         /* last entry offset should be 0 */
5010         file_info->NextEntryOffset = 0;
5011         kvfree(xattr_list);
5012
5013         rsp->OutputBufferLength = cpu_to_le32(nbytes);
5014
5015         return 0;
5016 }
5017
5018 static int get_file_internal_info(struct smb2_query_info_rsp *rsp,
5019                                   struct ksmbd_file *fp, void *rsp_org)
5020 {
5021         struct smb2_file_internal_info *file_info;
5022         struct kstat stat;
5023         int ret;
5024
5025         ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5026                           AT_STATX_SYNC_AS_STAT);
5027         if (ret)
5028                 return ret;
5029
5030         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
5031         file_info->IndexNumber = cpu_to_le64(stat.ino);
5032         rsp->OutputBufferLength =
5033                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
5034
5035         return 0;
5036 }
5037
5038 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
5039                                       struct ksmbd_file *fp, void *rsp_org)
5040 {
5041         struct smb2_file_ntwrk_info *file_info;
5042         struct kstat stat;
5043         u64 time;
5044         int ret;
5045
5046         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5047                 pr_err("no right to read the attributes : 0x%x\n",
5048                        fp->daccess);
5049                 return -EACCES;
5050         }
5051
5052         ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5053                           AT_STATX_SYNC_AS_STAT);
5054         if (ret)
5055                 return ret;
5056
5057         file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
5058
5059         file_info->CreationTime = cpu_to_le64(fp->create_time);
5060         time = ksmbd_UnixTimeToNT(stat.atime);
5061         file_info->LastAccessTime = cpu_to_le64(time);
5062         time = ksmbd_UnixTimeToNT(stat.mtime);
5063         file_info->LastWriteTime = cpu_to_le64(time);
5064         time = ksmbd_UnixTimeToNT(stat.ctime);
5065         file_info->ChangeTime = cpu_to_le64(time);
5066         file_info->Attributes = fp->f_ci->m_fattr;
5067         file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5068         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
5069         file_info->Reserved = cpu_to_le32(0);
5070         rsp->OutputBufferLength =
5071                 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
5072         return 0;
5073 }
5074
5075 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
5076 {
5077         struct smb2_file_ea_info *file_info;
5078
5079         file_info = (struct smb2_file_ea_info *)rsp->Buffer;
5080         file_info->EASize = 0;
5081         rsp->OutputBufferLength =
5082                 cpu_to_le32(sizeof(struct smb2_file_ea_info));
5083 }
5084
5085 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
5086                                    struct ksmbd_file *fp, void *rsp_org)
5087 {
5088         struct smb2_file_pos_info *file_info;
5089
5090         file_info = (struct smb2_file_pos_info *)rsp->Buffer;
5091         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
5092         rsp->OutputBufferLength =
5093                 cpu_to_le32(sizeof(struct smb2_file_pos_info));
5094 }
5095
5096 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
5097                                struct ksmbd_file *fp, void *rsp_org)
5098 {
5099         struct smb2_file_mode_info *file_info;
5100
5101         file_info = (struct smb2_file_mode_info *)rsp->Buffer;
5102         file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
5103         rsp->OutputBufferLength =
5104                 cpu_to_le32(sizeof(struct smb2_file_mode_info));
5105 }
5106
5107 static int get_file_compression_info(struct smb2_query_info_rsp *rsp,
5108                                      struct ksmbd_file *fp, void *rsp_org)
5109 {
5110         struct smb2_file_comp_info *file_info;
5111         struct kstat stat;
5112         int ret;
5113
5114         ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5115                           AT_STATX_SYNC_AS_STAT);
5116         if (ret)
5117                 return ret;
5118
5119         file_info = (struct smb2_file_comp_info *)rsp->Buffer;
5120         file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
5121         file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
5122         file_info->CompressionUnitShift = 0;
5123         file_info->ChunkShift = 0;
5124         file_info->ClusterShift = 0;
5125         memset(&file_info->Reserved[0], 0, 3);
5126
5127         rsp->OutputBufferLength =
5128                 cpu_to_le32(sizeof(struct smb2_file_comp_info));
5129
5130         return 0;
5131 }
5132
5133 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
5134                                        struct ksmbd_file *fp, void *rsp_org)
5135 {
5136         struct smb2_file_attr_tag_info *file_info;
5137
5138         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5139                 pr_err("no right to read the attributes : 0x%x\n",
5140                        fp->daccess);
5141                 return -EACCES;
5142         }
5143
5144         file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
5145         file_info->FileAttributes = fp->f_ci->m_fattr;
5146         file_info->ReparseTag = 0;
5147         rsp->OutputBufferLength =
5148                 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
5149         return 0;
5150 }
5151
5152 static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
5153                                 struct ksmbd_file *fp, void *rsp_org)
5154 {
5155         struct smb311_posix_qinfo *file_info;
5156         struct inode *inode = file_inode(fp->filp);
5157         struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
5158         vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
5159         vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
5160         struct kstat stat;
5161         u64 time;
5162         int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
5163         int ret;
5164
5165         ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5166                           AT_STATX_SYNC_AS_STAT);
5167         if (ret)
5168                 return ret;
5169
5170         file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
5171         file_info->CreationTime = cpu_to_le64(fp->create_time);
5172         time = ksmbd_UnixTimeToNT(stat.atime);
5173         file_info->LastAccessTime = cpu_to_le64(time);
5174         time = ksmbd_UnixTimeToNT(stat.mtime);
5175         file_info->LastWriteTime = cpu_to_le64(time);
5176         time = ksmbd_UnixTimeToNT(stat.ctime);
5177         file_info->ChangeTime = cpu_to_le64(time);
5178         file_info->DosAttributes = fp->f_ci->m_fattr;
5179         file_info->Inode = cpu_to_le64(stat.ino);
5180         file_info->EndOfFile = cpu_to_le64(stat.size);
5181         file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5182         file_info->HardLinks = cpu_to_le32(stat.nlink);
5183         file_info->Mode = cpu_to_le32(stat.mode & 0777);
5184         file_info->DeviceId = cpu_to_le32(stat.rdev);
5185
5186         /*
5187          * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
5188          * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
5189          *                sub_auth(4 * 1(num_subauth)) + RID(4).
5190          */
5191         id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
5192                   SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
5193         id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
5194                   SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
5195
5196         rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
5197
5198         return 0;
5199 }
5200
5201 static int smb2_get_info_file(struct ksmbd_work *work,
5202                               struct smb2_query_info_req *req,
5203                               struct smb2_query_info_rsp *rsp)
5204 {
5205         struct ksmbd_file *fp;
5206         int fileinfoclass = 0;
5207         int rc = 0;
5208         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5209
5210         if (test_share_config_flag(work->tcon->share_conf,
5211                                    KSMBD_SHARE_FLAG_PIPE)) {
5212                 /* smb2 info file called for pipe */
5213                 return smb2_get_info_file_pipe(work->sess, req, rsp,
5214                                                work->response_buf);
5215         }
5216
5217         if (work->next_smb2_rcv_hdr_off) {
5218                 if (!has_file_id(req->VolatileFileId)) {
5219                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5220                                     work->compound_fid);
5221                         id = work->compound_fid;
5222                         pid = work->compound_pfid;
5223                 }
5224         }
5225
5226         if (!has_file_id(id)) {
5227                 id = req->VolatileFileId;
5228                 pid = req->PersistentFileId;
5229         }
5230
5231         fp = ksmbd_lookup_fd_slow(work, id, pid);
5232         if (!fp)
5233                 return -ENOENT;
5234
5235         fileinfoclass = req->FileInfoClass;
5236
5237         switch (fileinfoclass) {
5238         case FILE_ACCESS_INFORMATION:
5239                 get_file_access_info(rsp, fp, work->response_buf);
5240                 break;
5241
5242         case FILE_BASIC_INFORMATION:
5243                 rc = get_file_basic_info(rsp, fp, work->response_buf);
5244                 break;
5245
5246         case FILE_STANDARD_INFORMATION:
5247                 rc = get_file_standard_info(rsp, fp, work->response_buf);
5248                 break;
5249
5250         case FILE_ALIGNMENT_INFORMATION:
5251                 get_file_alignment_info(rsp, work->response_buf);
5252                 break;
5253
5254         case FILE_ALL_INFORMATION:
5255                 rc = get_file_all_info(work, rsp, fp, work->response_buf);
5256                 break;
5257
5258         case FILE_ALTERNATE_NAME_INFORMATION:
5259                 get_file_alternate_info(work, rsp, fp, work->response_buf);
5260                 break;
5261
5262         case FILE_STREAM_INFORMATION:
5263                 rc = get_file_stream_info(work, rsp, fp, work->response_buf);
5264                 break;
5265
5266         case FILE_INTERNAL_INFORMATION:
5267                 rc = get_file_internal_info(rsp, fp, work->response_buf);
5268                 break;
5269
5270         case FILE_NETWORK_OPEN_INFORMATION:
5271                 rc = get_file_network_open_info(rsp, fp, work->response_buf);
5272                 break;
5273
5274         case FILE_EA_INFORMATION:
5275                 get_file_ea_info(rsp, work->response_buf);
5276                 break;
5277
5278         case FILE_FULL_EA_INFORMATION:
5279                 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
5280                 break;
5281
5282         case FILE_POSITION_INFORMATION:
5283                 get_file_position_info(rsp, fp, work->response_buf);
5284                 break;
5285
5286         case FILE_MODE_INFORMATION:
5287                 get_file_mode_info(rsp, fp, work->response_buf);
5288                 break;
5289
5290         case FILE_COMPRESSION_INFORMATION:
5291                 rc = get_file_compression_info(rsp, fp, work->response_buf);
5292                 break;
5293
5294         case FILE_ATTRIBUTE_TAG_INFORMATION:
5295                 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
5296                 break;
5297         case SMB_FIND_FILE_POSIX_INFO:
5298                 if (!work->tcon->posix_extensions) {
5299                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5300                         rc = -EOPNOTSUPP;
5301                 } else {
5302                         rc = find_file_posix_info(rsp, fp, work->response_buf);
5303                 }
5304                 break;
5305         default:
5306                 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
5307                             fileinfoclass);
5308                 rc = -EOPNOTSUPP;
5309         }
5310         if (!rc)
5311                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5312                                       rsp, work->response_buf);
5313         ksmbd_fd_put(work, fp);
5314         return rc;
5315 }
5316
5317 static int smb2_get_info_filesystem(struct ksmbd_work *work,
5318                                     struct smb2_query_info_req *req,
5319                                     struct smb2_query_info_rsp *rsp)
5320 {
5321         struct ksmbd_session *sess = work->sess;
5322         struct ksmbd_conn *conn = work->conn;
5323         struct ksmbd_share_config *share = work->tcon->share_conf;
5324         int fsinfoclass = 0;
5325         struct kstatfs stfs;
5326         struct path path;
5327         int rc = 0, len;
5328
5329         if (!share->path)
5330                 return -EIO;
5331
5332         rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
5333         if (rc) {
5334                 pr_err("cannot create vfs path\n");
5335                 return -EIO;
5336         }
5337
5338         rc = vfs_statfs(&path, &stfs);
5339         if (rc) {
5340                 pr_err("cannot do stat of path %s\n", share->path);
5341                 path_put(&path);
5342                 return -EIO;
5343         }
5344
5345         fsinfoclass = req->FileInfoClass;
5346
5347         switch (fsinfoclass) {
5348         case FS_DEVICE_INFORMATION:
5349         {
5350                 struct filesystem_device_info *info;
5351
5352                 info = (struct filesystem_device_info *)rsp->Buffer;
5353
5354                 info->DeviceType = cpu_to_le32(FILE_DEVICE_DISK);
5355                 info->DeviceCharacteristics =
5356                         cpu_to_le32(FILE_DEVICE_IS_MOUNTED);
5357                 if (!test_tree_conn_flag(work->tcon,
5358                                          KSMBD_TREE_CONN_FLAG_WRITABLE))
5359                         info->DeviceCharacteristics |=
5360                                 cpu_to_le32(FILE_READ_ONLY_DEVICE);
5361                 rsp->OutputBufferLength = cpu_to_le32(8);
5362                 break;
5363         }
5364         case FS_ATTRIBUTE_INFORMATION:
5365         {
5366                 struct filesystem_attribute_info *info;
5367                 size_t sz;
5368
5369                 info = (struct filesystem_attribute_info *)rsp->Buffer;
5370                 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
5371                                                FILE_PERSISTENT_ACLS |
5372                                                FILE_UNICODE_ON_DISK |
5373                                                FILE_CASE_PRESERVED_NAMES |
5374                                                FILE_CASE_SENSITIVE_SEARCH |
5375                                                FILE_SUPPORTS_BLOCK_REFCOUNTING);
5376
5377                 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
5378
5379                 if (test_share_config_flag(work->tcon->share_conf,
5380                     KSMBD_SHARE_FLAG_STREAMS))
5381                         info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
5382
5383                 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
5384                 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
5385                                         "NTFS", PATH_MAX, conn->local_nls, 0);
5386                 len = len * 2;
5387                 info->FileSystemNameLen = cpu_to_le32(len);
5388                 sz = sizeof(struct filesystem_attribute_info) + len;
5389                 rsp->OutputBufferLength = cpu_to_le32(sz);
5390                 break;
5391         }
5392         case FS_VOLUME_INFORMATION:
5393         {
5394                 struct filesystem_vol_info *info;
5395                 size_t sz;
5396                 unsigned int serial_crc = 0;
5397
5398                 info = (struct filesystem_vol_info *)(rsp->Buffer);
5399                 info->VolumeCreationTime = 0;
5400                 serial_crc = crc32_le(serial_crc, share->name,
5401                                       strlen(share->name));
5402                 serial_crc = crc32_le(serial_crc, share->path,
5403                                       strlen(share->path));
5404                 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
5405                                       strlen(ksmbd_netbios_name()));
5406                 /* Taking dummy value of serial number*/
5407                 info->SerialNumber = cpu_to_le32(serial_crc);
5408                 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
5409                                         share->name, PATH_MAX,
5410                                         conn->local_nls, 0);
5411                 len = len * 2;
5412                 info->VolumeLabelSize = cpu_to_le32(len);
5413                 info->Reserved = 0;
5414                 sz = sizeof(struct filesystem_vol_info) + len;
5415                 rsp->OutputBufferLength = cpu_to_le32(sz);
5416                 break;
5417         }
5418         case FS_SIZE_INFORMATION:
5419         {
5420                 struct filesystem_info *info;
5421
5422                 info = (struct filesystem_info *)(rsp->Buffer);
5423                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5424                 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5425                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5426                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5427                 rsp->OutputBufferLength = cpu_to_le32(24);
5428                 break;
5429         }
5430         case FS_FULL_SIZE_INFORMATION:
5431         {
5432                 struct smb2_fs_full_size_info *info;
5433
5434                 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5435                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5436                 info->CallerAvailableAllocationUnits =
5437                                         cpu_to_le64(stfs.f_bavail);
5438                 info->ActualAvailableAllocationUnits =
5439                                         cpu_to_le64(stfs.f_bfree);
5440                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5441                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5442                 rsp->OutputBufferLength = cpu_to_le32(32);
5443                 break;
5444         }
5445         case FS_OBJECT_ID_INFORMATION:
5446         {
5447                 struct object_id_info *info;
5448
5449                 info = (struct object_id_info *)(rsp->Buffer);
5450
5451                 if (!user_guest(sess->user))
5452                         memcpy(info->objid, user_passkey(sess->user), 16);
5453                 else
5454                         memset(info->objid, 0, 16);
5455
5456                 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5457                 info->extended_info.version = cpu_to_le32(1);
5458                 info->extended_info.release = cpu_to_le32(1);
5459                 info->extended_info.rel_date = 0;
5460                 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5461                 rsp->OutputBufferLength = cpu_to_le32(64);
5462                 break;
5463         }
5464         case FS_SECTOR_SIZE_INFORMATION:
5465         {
5466                 struct smb3_fs_ss_info *info;
5467                 unsigned int sector_size =
5468                         min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5469
5470                 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5471
5472                 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5473                 info->PhysicalBytesPerSectorForAtomicity =
5474                                 cpu_to_le32(sector_size);
5475                 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5476                 info->FSEffPhysicalBytesPerSectorForAtomicity =
5477                                 cpu_to_le32(sector_size);
5478                 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5479                                     SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5480                 info->ByteOffsetForSectorAlignment = 0;
5481                 info->ByteOffsetForPartitionAlignment = 0;
5482                 rsp->OutputBufferLength = cpu_to_le32(28);
5483                 break;
5484         }
5485         case FS_CONTROL_INFORMATION:
5486         {
5487                 /*
5488                  * TODO : The current implementation is based on
5489                  * test result with win7(NTFS) server. It's need to
5490                  * modify this to get valid Quota values
5491                  * from Linux kernel
5492                  */
5493                 struct smb2_fs_control_info *info;
5494
5495                 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5496                 info->FreeSpaceStartFiltering = 0;
5497                 info->FreeSpaceThreshold = 0;
5498                 info->FreeSpaceStopFiltering = 0;
5499                 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5500                 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5501                 info->Padding = 0;
5502                 rsp->OutputBufferLength = cpu_to_le32(48);
5503                 break;
5504         }
5505         case FS_POSIX_INFORMATION:
5506         {
5507                 struct filesystem_posix_info *info;
5508
5509                 if (!work->tcon->posix_extensions) {
5510                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5511                         rc = -EOPNOTSUPP;
5512                 } else {
5513                         info = (struct filesystem_posix_info *)(rsp->Buffer);
5514                         info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5515                         info->BlockSize = cpu_to_le32(stfs.f_bsize);
5516                         info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5517                         info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5518                         info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5519                         info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5520                         info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5521                         rsp->OutputBufferLength = cpu_to_le32(56);
5522                 }
5523                 break;
5524         }
5525         default:
5526                 path_put(&path);
5527                 return -EOPNOTSUPP;
5528         }
5529         rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5530                               rsp, work->response_buf);
5531         path_put(&path);
5532         return rc;
5533 }
5534
5535 static int smb2_get_info_sec(struct ksmbd_work *work,
5536                              struct smb2_query_info_req *req,
5537                              struct smb2_query_info_rsp *rsp)
5538 {
5539         struct ksmbd_file *fp;
5540         struct mnt_idmap *idmap;
5541         struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5542         struct smb_fattr fattr = {{0}};
5543         struct inode *inode;
5544         __u32 secdesclen = 0;
5545         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5546         int addition_info = le32_to_cpu(req->AdditionalInformation);
5547         int rc = 0, ppntsd_size = 0;
5548
5549         if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5550                               PROTECTED_DACL_SECINFO |
5551                               UNPROTECTED_DACL_SECINFO)) {
5552                 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5553                        addition_info);
5554
5555                 pntsd->revision = cpu_to_le16(1);
5556                 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5557                 pntsd->osidoffset = 0;
5558                 pntsd->gsidoffset = 0;
5559                 pntsd->sacloffset = 0;
5560                 pntsd->dacloffset = 0;
5561
5562                 secdesclen = sizeof(struct smb_ntsd);
5563                 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5564
5565                 return 0;
5566         }
5567
5568         if (work->next_smb2_rcv_hdr_off) {
5569                 if (!has_file_id(req->VolatileFileId)) {
5570                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5571                                     work->compound_fid);
5572                         id = work->compound_fid;
5573                         pid = work->compound_pfid;
5574                 }
5575         }
5576
5577         if (!has_file_id(id)) {
5578                 id = req->VolatileFileId;
5579                 pid = req->PersistentFileId;
5580         }
5581
5582         fp = ksmbd_lookup_fd_slow(work, id, pid);
5583         if (!fp)
5584                 return -ENOENT;
5585
5586         idmap = file_mnt_idmap(fp->filp);
5587         inode = file_inode(fp->filp);
5588         ksmbd_acls_fattr(&fattr, idmap, inode);
5589
5590         if (test_share_config_flag(work->tcon->share_conf,
5591                                    KSMBD_SHARE_FLAG_ACL_XATTR))
5592                 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
5593                                                      fp->filp->f_path.dentry,
5594                                                      &ppntsd);
5595
5596         /* Check if sd buffer size exceeds response buffer size */
5597         if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5598                 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
5599                                     addition_info, &secdesclen, &fattr);
5600         posix_acl_release(fattr.cf_acls);
5601         posix_acl_release(fattr.cf_dacls);
5602         kfree(ppntsd);
5603         ksmbd_fd_put(work, fp);
5604         if (rc)
5605                 return rc;
5606
5607         rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5608         return 0;
5609 }
5610
5611 /**
5612  * smb2_query_info() - handler for smb2 query info command
5613  * @work:       smb work containing query info request buffer
5614  *
5615  * Return:      0 on success, otherwise error
5616  */
5617 int smb2_query_info(struct ksmbd_work *work)
5618 {
5619         struct smb2_query_info_req *req;
5620         struct smb2_query_info_rsp *rsp;
5621         int rc = 0;
5622
5623         ksmbd_debug(SMB, "Received request smb2 query info request\n");
5624
5625         WORK_BUFFERS(work, req, rsp);
5626
5627         if (ksmbd_override_fsids(work)) {
5628                 rc = -ENOMEM;
5629                 goto err_out;
5630         }
5631
5632         switch (req->InfoType) {
5633         case SMB2_O_INFO_FILE:
5634                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5635                 rc = smb2_get_info_file(work, req, rsp);
5636                 break;
5637         case SMB2_O_INFO_FILESYSTEM:
5638                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5639                 rc = smb2_get_info_filesystem(work, req, rsp);
5640                 break;
5641         case SMB2_O_INFO_SECURITY:
5642                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5643                 rc = smb2_get_info_sec(work, req, rsp);
5644                 break;
5645         default:
5646                 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5647                             req->InfoType);
5648                 rc = -EOPNOTSUPP;
5649         }
5650         ksmbd_revert_fsids(work);
5651
5652         if (!rc) {
5653                 rsp->StructureSize = cpu_to_le16(9);
5654                 rsp->OutputBufferOffset = cpu_to_le16(72);
5655                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
5656                                        offsetof(struct smb2_query_info_rsp, Buffer) +
5657                                         le32_to_cpu(rsp->OutputBufferLength));
5658         }
5659
5660 err_out:
5661         if (rc < 0) {
5662                 if (rc == -EACCES)
5663                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
5664                 else if (rc == -ENOENT)
5665                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5666                 else if (rc == -EIO)
5667                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5668                 else if (rc == -ENOMEM)
5669                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
5670                 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5671                         rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5672                 smb2_set_err_rsp(work);
5673
5674                 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5675                             rc);
5676                 return rc;
5677         }
5678         return 0;
5679 }
5680
5681 /**
5682  * smb2_close_pipe() - handler for closing IPC pipe
5683  * @work:       smb work containing close request buffer
5684  *
5685  * Return:      0
5686  */
5687 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5688 {
5689         u64 id;
5690         struct smb2_close_req *req;
5691         struct smb2_close_rsp *rsp;
5692
5693         WORK_BUFFERS(work, req, rsp);
5694
5695         id = req->VolatileFileId;
5696         ksmbd_session_rpc_close(work->sess, id);
5697
5698         rsp->StructureSize = cpu_to_le16(60);
5699         rsp->Flags = 0;
5700         rsp->Reserved = 0;
5701         rsp->CreationTime = 0;
5702         rsp->LastAccessTime = 0;
5703         rsp->LastWriteTime = 0;
5704         rsp->ChangeTime = 0;
5705         rsp->AllocationSize = 0;
5706         rsp->EndOfFile = 0;
5707         rsp->Attributes = 0;
5708
5709         return ksmbd_iov_pin_rsp(work, (void *)rsp,
5710                                  sizeof(struct smb2_close_rsp));
5711 }
5712
5713 /**
5714  * smb2_close() - handler for smb2 close file command
5715  * @work:       smb work containing close request buffer
5716  *
5717  * Return:      0
5718  */
5719 int smb2_close(struct ksmbd_work *work)
5720 {
5721         u64 volatile_id = KSMBD_NO_FID;
5722         u64 sess_id;
5723         struct smb2_close_req *req;
5724         struct smb2_close_rsp *rsp;
5725         struct ksmbd_conn *conn = work->conn;
5726         struct ksmbd_file *fp;
5727         u64 time;
5728         int err = 0;
5729
5730         ksmbd_debug(SMB, "Received smb2 close request\n");
5731
5732         WORK_BUFFERS(work, req, rsp);
5733
5734         if (test_share_config_flag(work->tcon->share_conf,
5735                                    KSMBD_SHARE_FLAG_PIPE)) {
5736                 ksmbd_debug(SMB, "IPC pipe close request\n");
5737                 return smb2_close_pipe(work);
5738         }
5739
5740         sess_id = le64_to_cpu(req->hdr.SessionId);
5741         if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5742                 sess_id = work->compound_sid;
5743
5744         work->compound_sid = 0;
5745         if (check_session_id(conn, sess_id)) {
5746                 work->compound_sid = sess_id;
5747         } else {
5748                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5749                 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5750                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5751                 err = -EBADF;
5752                 goto out;
5753         }
5754
5755         if (work->next_smb2_rcv_hdr_off &&
5756             !has_file_id(req->VolatileFileId)) {
5757                 if (!has_file_id(work->compound_fid)) {
5758                         /* file already closed, return FILE_CLOSED */
5759                         ksmbd_debug(SMB, "file already closed\n");
5760                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5761                         err = -EBADF;
5762                         goto out;
5763                 } else {
5764                         ksmbd_debug(SMB,
5765                                     "Compound request set FID = %llu:%llu\n",
5766                                     work->compound_fid,
5767                                     work->compound_pfid);
5768                         volatile_id = work->compound_fid;
5769
5770                         /* file closed, stored id is not valid anymore */
5771                         work->compound_fid = KSMBD_NO_FID;
5772                         work->compound_pfid = KSMBD_NO_FID;
5773                 }
5774         } else {
5775                 volatile_id = req->VolatileFileId;
5776         }
5777         ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5778
5779         rsp->StructureSize = cpu_to_le16(60);
5780         rsp->Reserved = 0;
5781
5782         if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5783                 struct kstat stat;
5784                 int ret;
5785
5786                 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5787                 if (!fp) {
5788                         err = -ENOENT;
5789                         goto out;
5790                 }
5791
5792                 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5793                                   AT_STATX_SYNC_AS_STAT);
5794                 if (ret) {
5795                         ksmbd_fd_put(work, fp);
5796                         goto out;
5797                 }
5798
5799                 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5800                 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
5801                         cpu_to_le64(stat.blocks << 9);
5802                 rsp->EndOfFile = cpu_to_le64(stat.size);
5803                 rsp->Attributes = fp->f_ci->m_fattr;
5804                 rsp->CreationTime = cpu_to_le64(fp->create_time);
5805                 time = ksmbd_UnixTimeToNT(stat.atime);
5806                 rsp->LastAccessTime = cpu_to_le64(time);
5807                 time = ksmbd_UnixTimeToNT(stat.mtime);
5808                 rsp->LastWriteTime = cpu_to_le64(time);
5809                 time = ksmbd_UnixTimeToNT(stat.ctime);
5810                 rsp->ChangeTime = cpu_to_le64(time);
5811                 ksmbd_fd_put(work, fp);
5812         } else {
5813                 rsp->Flags = 0;
5814                 rsp->AllocationSize = 0;
5815                 rsp->EndOfFile = 0;
5816                 rsp->Attributes = 0;
5817                 rsp->CreationTime = 0;
5818                 rsp->LastAccessTime = 0;
5819                 rsp->LastWriteTime = 0;
5820                 rsp->ChangeTime = 0;
5821         }
5822
5823         err = ksmbd_close_fd(work, volatile_id);
5824 out:
5825         if (!err)
5826                 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
5827                                         sizeof(struct smb2_close_rsp));
5828
5829         if (err) {
5830                 if (rsp->hdr.Status == 0)
5831                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5832                 smb2_set_err_rsp(work);
5833         }
5834
5835         return err;
5836 }
5837
5838 /**
5839  * smb2_echo() - handler for smb2 echo(ping) command
5840  * @work:       smb work containing echo request buffer
5841  *
5842  * Return:      0
5843  */
5844 int smb2_echo(struct ksmbd_work *work)
5845 {
5846         struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5847
5848         ksmbd_debug(SMB, "Received smb2 echo request\n");
5849
5850         if (work->next_smb2_rcv_hdr_off)
5851                 rsp = ksmbd_resp_buf_next(work);
5852
5853         rsp->StructureSize = cpu_to_le16(4);
5854         rsp->Reserved = 0;
5855         return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
5856 }
5857
5858 static int smb2_rename(struct ksmbd_work *work,
5859                        struct ksmbd_file *fp,
5860                        struct smb2_file_rename_info *file_info,
5861                        struct nls_table *local_nls)
5862 {
5863         struct ksmbd_share_config *share = fp->tcon->share_conf;
5864         char *new_name = NULL;
5865         int rc, flags = 0;
5866
5867         ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5868         new_name = smb2_get_name(file_info->FileName,
5869                                  le32_to_cpu(file_info->FileNameLength),
5870                                  local_nls);
5871         if (IS_ERR(new_name))
5872                 return PTR_ERR(new_name);
5873
5874         if (strchr(new_name, ':')) {
5875                 int s_type;
5876                 char *xattr_stream_name, *stream_name = NULL;
5877                 size_t xattr_stream_size;
5878                 int len;
5879
5880                 rc = parse_stream_name(new_name, &stream_name, &s_type);
5881                 if (rc < 0)
5882                         goto out;
5883
5884                 len = strlen(new_name);
5885                 if (len > 0 && new_name[len - 1] != '/') {
5886                         pr_err("not allow base filename in rename\n");
5887                         rc = -ESHARE;
5888                         goto out;
5889                 }
5890
5891                 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5892                                                  &xattr_stream_name,
5893                                                  &xattr_stream_size,
5894                                                  s_type);
5895                 if (rc)
5896                         goto out;
5897
5898                 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
5899                                         &fp->filp->f_path,
5900                                         xattr_stream_name,
5901                                         NULL, 0, 0, true);
5902                 if (rc < 0) {
5903                         pr_err("failed to store stream name in xattr: %d\n",
5904                                rc);
5905                         rc = -EINVAL;
5906                         goto out;
5907                 }
5908
5909                 goto out;
5910         }
5911
5912         ksmbd_debug(SMB, "new name %s\n", new_name);
5913         if (ksmbd_share_veto_filename(share, new_name)) {
5914                 rc = -ENOENT;
5915                 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5916                 goto out;
5917         }
5918
5919         if (!file_info->ReplaceIfExists)
5920                 flags = RENAME_NOREPLACE;
5921
5922         rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
5923         if (!rc)
5924                 smb_break_all_levII_oplock(work, fp, 0);
5925 out:
5926         kfree(new_name);
5927         return rc;
5928 }
5929
5930 static int smb2_create_link(struct ksmbd_work *work,
5931                             struct ksmbd_share_config *share,
5932                             struct smb2_file_link_info *file_info,
5933                             unsigned int buf_len, struct file *filp,
5934                             struct nls_table *local_nls)
5935 {
5936         char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5937         struct path path, parent_path;
5938         bool file_present = false;
5939         int rc;
5940
5941         if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5942                         le32_to_cpu(file_info->FileNameLength))
5943                 return -EINVAL;
5944
5945         ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5946         pathname = kmalloc(PATH_MAX, KSMBD_DEFAULT_GFP);
5947         if (!pathname)
5948                 return -ENOMEM;
5949
5950         link_name = smb2_get_name(file_info->FileName,
5951                                   le32_to_cpu(file_info->FileNameLength),
5952                                   local_nls);
5953         if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5954                 rc = -EINVAL;
5955                 goto out;
5956         }
5957
5958         ksmbd_debug(SMB, "link name is %s\n", link_name);
5959         target_name = file_path(filp, pathname, PATH_MAX);
5960         if (IS_ERR(target_name)) {
5961                 rc = -EINVAL;
5962                 goto out;
5963         }
5964
5965         ksmbd_debug(SMB, "target name is %s\n", target_name);
5966         rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
5967                                         &parent_path, &path, 0);
5968         if (rc) {
5969                 if (rc != -ENOENT)
5970                         goto out;
5971         } else
5972                 file_present = true;
5973
5974         if (file_info->ReplaceIfExists) {
5975                 if (file_present) {
5976                         rc = ksmbd_vfs_remove_file(work, &path);
5977                         if (rc) {
5978                                 rc = -EINVAL;
5979                                 ksmbd_debug(SMB, "cannot delete %s\n",
5980                                             link_name);
5981                                 goto out;
5982                         }
5983                 }
5984         } else {
5985                 if (file_present) {
5986                         rc = -EEXIST;
5987                         ksmbd_debug(SMB, "link already exists\n");
5988                         goto out;
5989                 }
5990         }
5991
5992         rc = ksmbd_vfs_link(work, target_name, link_name);
5993         if (rc)
5994                 rc = -EINVAL;
5995 out:
5996         if (file_present)
5997                 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
5998
5999         if (!IS_ERR(link_name))
6000                 kfree(link_name);
6001         kfree(pathname);
6002         return rc;
6003 }
6004
6005 static int set_file_basic_info(struct ksmbd_file *fp,
6006                                struct smb2_file_basic_info *file_info,
6007                                struct ksmbd_share_config *share)
6008 {
6009         struct iattr attrs;
6010         struct file *filp;
6011         struct inode *inode;
6012         struct mnt_idmap *idmap;
6013         int rc = 0;
6014
6015         if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
6016                 return -EACCES;
6017
6018         attrs.ia_valid = 0;
6019         filp = fp->filp;
6020         inode = file_inode(filp);
6021         idmap = file_mnt_idmap(filp);
6022
6023         if (file_info->CreationTime)
6024                 fp->create_time = le64_to_cpu(file_info->CreationTime);
6025
6026         if (file_info->LastAccessTime) {
6027                 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
6028                 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
6029         }
6030
6031         if (file_info->ChangeTime)
6032                 inode_set_ctime_to_ts(inode,
6033                                 ksmbd_NTtimeToUnix(file_info->ChangeTime));
6034
6035         if (file_info->LastWriteTime) {
6036                 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
6037                 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME);
6038         }
6039
6040         if (file_info->Attributes) {
6041                 if (!S_ISDIR(inode->i_mode) &&
6042                     file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
6043                         pr_err("can't change a file to a directory\n");
6044                         return -EINVAL;
6045                 }
6046
6047                 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
6048                         fp->f_ci->m_fattr = file_info->Attributes |
6049                                 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
6050         }
6051
6052         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
6053             (file_info->CreationTime || file_info->Attributes)) {
6054                 struct xattr_dos_attrib da = {0};
6055
6056                 da.version = 4;
6057                 da.itime = fp->itime;
6058                 da.create_time = fp->create_time;
6059                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
6060                 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
6061                         XATTR_DOSINFO_ITIME;
6062
6063                 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da,
6064                                 true);
6065                 if (rc)
6066                         ksmbd_debug(SMB,
6067                                     "failed to restore file attribute in EA\n");
6068                 rc = 0;
6069         }
6070
6071         if (attrs.ia_valid) {
6072                 struct dentry *dentry = filp->f_path.dentry;
6073                 struct inode *inode = d_inode(dentry);
6074
6075                 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
6076                         return -EACCES;
6077
6078                 inode_lock(inode);
6079                 rc = notify_change(idmap, dentry, &attrs, NULL);
6080                 inode_unlock(inode);
6081         }
6082         return rc;
6083 }
6084
6085 static int set_file_allocation_info(struct ksmbd_work *work,
6086                                     struct ksmbd_file *fp,
6087                                     struct smb2_file_alloc_info *file_alloc_info)
6088 {
6089         /*
6090          * TODO : It's working fine only when store dos attributes
6091          * is not yes. need to implement a logic which works
6092          * properly with any smb.conf option
6093          */
6094
6095         loff_t alloc_blks;
6096         struct inode *inode;
6097         struct kstat stat;
6098         int rc;
6099
6100         if (!(fp->daccess & FILE_WRITE_DATA_LE))
6101                 return -EACCES;
6102
6103         rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
6104                          AT_STATX_SYNC_AS_STAT);
6105         if (rc)
6106                 return rc;
6107
6108         alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
6109         inode = file_inode(fp->filp);
6110
6111         if (alloc_blks > stat.blocks) {
6112                 smb_break_all_levII_oplock(work, fp, 1);
6113                 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
6114                                    alloc_blks * 512);
6115                 if (rc && rc != -EOPNOTSUPP) {
6116                         pr_err("vfs_fallocate is failed : %d\n", rc);
6117                         return rc;
6118                 }
6119         } else if (alloc_blks < stat.blocks) {
6120                 loff_t size;
6121
6122                 /*
6123                  * Allocation size could be smaller than original one
6124                  * which means allocated blocks in file should be
6125                  * deallocated. use truncate to cut out it, but inode
6126                  * size is also updated with truncate offset.
6127                  * inode size is retained by backup inode size.
6128                  */
6129                 size = i_size_read(inode);
6130                 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
6131                 if (rc) {
6132                         pr_err("truncate failed!, err %d\n", rc);
6133                         return rc;
6134                 }
6135                 if (size < alloc_blks * 512)
6136                         i_size_write(inode, size);
6137         }
6138         return 0;
6139 }
6140
6141 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6142                                 struct smb2_file_eof_info *file_eof_info)
6143 {
6144         loff_t newsize;
6145         struct inode *inode;
6146         int rc;
6147
6148         if (!(fp->daccess & FILE_WRITE_DATA_LE))
6149                 return -EACCES;
6150
6151         newsize = le64_to_cpu(file_eof_info->EndOfFile);
6152         inode = file_inode(fp->filp);
6153
6154         /*
6155          * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
6156          * on FAT32 shared device, truncate execution time is too long
6157          * and network error could cause from windows client. because
6158          * truncate of some filesystem like FAT32 fill zero data in
6159          * truncated range.
6160          */
6161         if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
6162                 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
6163                 rc = ksmbd_vfs_truncate(work, fp, newsize);
6164                 if (rc) {
6165                         ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
6166                         if (rc != -EAGAIN)
6167                                 rc = -EBADF;
6168                         return rc;
6169                 }
6170         }
6171         return 0;
6172 }
6173
6174 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6175                            struct smb2_file_rename_info *rename_info,
6176                            unsigned int buf_len)
6177 {
6178         if (!(fp->daccess & FILE_DELETE_LE)) {
6179                 pr_err("no right to delete : 0x%x\n", fp->daccess);
6180                 return -EACCES;
6181         }
6182
6183         if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
6184                         le32_to_cpu(rename_info->FileNameLength))
6185                 return -EINVAL;
6186
6187         if (!le32_to_cpu(rename_info->FileNameLength))
6188                 return -EINVAL;
6189
6190         return smb2_rename(work, fp, rename_info, work->conn->local_nls);
6191 }
6192
6193 static int set_file_disposition_info(struct ksmbd_file *fp,
6194                                      struct smb2_file_disposition_info *file_info)
6195 {
6196         struct inode *inode;
6197
6198         if (!(fp->daccess & FILE_DELETE_LE)) {
6199                 pr_err("no right to delete : 0x%x\n", fp->daccess);
6200                 return -EACCES;
6201         }
6202
6203         inode = file_inode(fp->filp);
6204         if (file_info->DeletePending) {
6205                 if (S_ISDIR(inode->i_mode) &&
6206                     ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
6207                         return -EBUSY;
6208                 ksmbd_set_inode_pending_delete(fp);
6209         } else {
6210                 ksmbd_clear_inode_pending_delete(fp);
6211         }
6212         return 0;
6213 }
6214
6215 static int set_file_position_info(struct ksmbd_file *fp,
6216                                   struct smb2_file_pos_info *file_info)
6217 {
6218         loff_t current_byte_offset;
6219         unsigned long sector_size;
6220         struct inode *inode;
6221
6222         inode = file_inode(fp->filp);
6223         current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
6224         sector_size = inode->i_sb->s_blocksize;
6225
6226         if (current_byte_offset < 0 ||
6227             (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
6228              current_byte_offset & (sector_size - 1))) {
6229                 pr_err("CurrentByteOffset is not valid : %llu\n",
6230                        current_byte_offset);
6231                 return -EINVAL;
6232         }
6233
6234         fp->filp->f_pos = current_byte_offset;
6235         return 0;
6236 }
6237
6238 static int set_file_mode_info(struct ksmbd_file *fp,
6239                               struct smb2_file_mode_info *file_info)
6240 {
6241         __le32 mode;
6242
6243         mode = file_info->Mode;
6244
6245         if ((mode & ~FILE_MODE_INFO_MASK)) {
6246                 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
6247                 return -EINVAL;
6248         }
6249
6250         /*
6251          * TODO : need to implement consideration for
6252          * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
6253          */
6254         ksmbd_vfs_set_fadvise(fp->filp, mode);
6255         fp->coption = mode;
6256         return 0;
6257 }
6258
6259 /**
6260  * smb2_set_info_file() - handler for smb2 set info command
6261  * @work:       smb work containing set info command buffer
6262  * @fp:         ksmbd_file pointer
6263  * @req:        request buffer pointer
6264  * @share:      ksmbd_share_config pointer
6265  *
6266  * Return:      0 on success, otherwise error
6267  * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
6268  */
6269 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
6270                               struct smb2_set_info_req *req,
6271                               struct ksmbd_share_config *share)
6272 {
6273         unsigned int buf_len = le32_to_cpu(req->BufferLength);
6274         char *buffer = (char *)req + le16_to_cpu(req->BufferOffset);
6275
6276         switch (req->FileInfoClass) {
6277         case FILE_BASIC_INFORMATION:
6278         {
6279                 if (buf_len < sizeof(struct smb2_file_basic_info))
6280                         return -EINVAL;
6281
6282                 return set_file_basic_info(fp, (struct smb2_file_basic_info *)buffer, share);
6283         }
6284         case FILE_ALLOCATION_INFORMATION:
6285         {
6286                 if (buf_len < sizeof(struct smb2_file_alloc_info))
6287                         return -EINVAL;
6288
6289                 return set_file_allocation_info(work, fp,
6290                                                 (struct smb2_file_alloc_info *)buffer);
6291         }
6292         case FILE_END_OF_FILE_INFORMATION:
6293         {
6294                 if (buf_len < sizeof(struct smb2_file_eof_info))
6295                         return -EINVAL;
6296
6297                 return set_end_of_file_info(work, fp,
6298                                             (struct smb2_file_eof_info *)buffer);
6299         }
6300         case FILE_RENAME_INFORMATION:
6301         {
6302                 if (buf_len < sizeof(struct smb2_file_rename_info))
6303                         return -EINVAL;
6304
6305                 return set_rename_info(work, fp,
6306                                        (struct smb2_file_rename_info *)buffer,
6307                                        buf_len);
6308         }
6309         case FILE_LINK_INFORMATION:
6310         {
6311                 if (buf_len < sizeof(struct smb2_file_link_info))
6312                         return -EINVAL;
6313
6314                 return smb2_create_link(work, work->tcon->share_conf,
6315                                         (struct smb2_file_link_info *)buffer,
6316                                         buf_len, fp->filp,
6317                                         work->conn->local_nls);
6318         }
6319         case FILE_DISPOSITION_INFORMATION:
6320         {
6321                 if (buf_len < sizeof(struct smb2_file_disposition_info))
6322                         return -EINVAL;
6323
6324                 return set_file_disposition_info(fp,
6325                                                  (struct smb2_file_disposition_info *)buffer);
6326         }
6327         case FILE_FULL_EA_INFORMATION:
6328         {
6329                 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
6330                         pr_err("Not permitted to write ext  attr: 0x%x\n",
6331                                fp->daccess);
6332                         return -EACCES;
6333                 }
6334
6335                 if (buf_len < sizeof(struct smb2_ea_info))
6336                         return -EINVAL;
6337
6338                 return smb2_set_ea((struct smb2_ea_info *)buffer,
6339                                    buf_len, &fp->filp->f_path, true);
6340         }
6341         case FILE_POSITION_INFORMATION:
6342         {
6343                 if (buf_len < sizeof(struct smb2_file_pos_info))
6344                         return -EINVAL;
6345
6346                 return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer);
6347         }
6348         case FILE_MODE_INFORMATION:
6349         {
6350                 if (buf_len < sizeof(struct smb2_file_mode_info))
6351                         return -EINVAL;
6352
6353                 return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer);
6354         }
6355         }
6356
6357         pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6358         return -EOPNOTSUPP;
6359 }
6360
6361 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6362                              char *buffer, int buf_len)
6363 {
6364         struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6365
6366         fp->saccess |= FILE_SHARE_DELETE_LE;
6367
6368         return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6369                         buf_len, false, true);
6370 }
6371
6372 /**
6373  * smb2_set_info() - handler for smb2 set info command handler
6374  * @work:       smb work containing set info request buffer
6375  *
6376  * Return:      0 on success, otherwise error
6377  */
6378 int smb2_set_info(struct ksmbd_work *work)
6379 {
6380         struct smb2_set_info_req *req;
6381         struct smb2_set_info_rsp *rsp;
6382         struct ksmbd_file *fp = NULL;
6383         int rc = 0;
6384         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6385
6386         ksmbd_debug(SMB, "Received smb2 set info request\n");
6387
6388         if (work->next_smb2_rcv_hdr_off) {
6389                 req = ksmbd_req_buf_next(work);
6390                 rsp = ksmbd_resp_buf_next(work);
6391                 if (!has_file_id(req->VolatileFileId)) {
6392                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6393                                     work->compound_fid);
6394                         id = work->compound_fid;
6395                         pid = work->compound_pfid;
6396                 }
6397         } else {
6398                 req = smb2_get_msg(work->request_buf);
6399                 rsp = smb2_get_msg(work->response_buf);
6400         }
6401
6402         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6403                 ksmbd_debug(SMB, "User does not have write permission\n");
6404                 pr_err("User does not have write permission\n");
6405                 rc = -EACCES;
6406                 goto err_out;
6407         }
6408
6409         if (!has_file_id(id)) {
6410                 id = req->VolatileFileId;
6411                 pid = req->PersistentFileId;
6412         }
6413
6414         fp = ksmbd_lookup_fd_slow(work, id, pid);
6415         if (!fp) {
6416                 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6417                 rc = -ENOENT;
6418                 goto err_out;
6419         }
6420
6421         switch (req->InfoType) {
6422         case SMB2_O_INFO_FILE:
6423                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6424                 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6425                 break;
6426         case SMB2_O_INFO_SECURITY:
6427                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6428                 if (ksmbd_override_fsids(work)) {
6429                         rc = -ENOMEM;
6430                         goto err_out;
6431                 }
6432                 rc = smb2_set_info_sec(fp,
6433                                        le32_to_cpu(req->AdditionalInformation),
6434                                        (char *)req + le16_to_cpu(req->BufferOffset),
6435                                        le32_to_cpu(req->BufferLength));
6436                 ksmbd_revert_fsids(work);
6437                 break;
6438         default:
6439                 rc = -EOPNOTSUPP;
6440         }
6441
6442         if (rc < 0)
6443                 goto err_out;
6444
6445         rsp->StructureSize = cpu_to_le16(2);
6446         rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
6447                                sizeof(struct smb2_set_info_rsp));
6448         if (rc)
6449                 goto err_out;
6450         ksmbd_fd_put(work, fp);
6451         return 0;
6452
6453 err_out:
6454         if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6455                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6456         else if (rc == -EINVAL)
6457                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6458         else if (rc == -ESHARE)
6459                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6460         else if (rc == -ENOENT)
6461                 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6462         else if (rc == -EBUSY || rc == -ENOTEMPTY)
6463                 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6464         else if (rc == -EAGAIN)
6465                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6466         else if (rc == -EBADF || rc == -ESTALE)
6467                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6468         else if (rc == -EEXIST)
6469                 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6470         else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6471                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6472         smb2_set_err_rsp(work);
6473         ksmbd_fd_put(work, fp);
6474         ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6475         return rc;
6476 }
6477
6478 /**
6479  * smb2_read_pipe() - handler for smb2 read from IPC pipe
6480  * @work:       smb work containing read IPC pipe command buffer
6481  *
6482  * Return:      0 on success, otherwise error
6483  */
6484 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6485 {
6486         int nbytes = 0, err;
6487         u64 id;
6488         struct ksmbd_rpc_command *rpc_resp;
6489         struct smb2_read_req *req;
6490         struct smb2_read_rsp *rsp;
6491
6492         WORK_BUFFERS(work, req, rsp);
6493
6494         id = req->VolatileFileId;
6495
6496         rpc_resp = ksmbd_rpc_read(work->sess, id);
6497         if (rpc_resp) {
6498                 void *aux_payload_buf;
6499
6500                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6501                         err = -EINVAL;
6502                         goto out;
6503                 }
6504
6505                 aux_payload_buf =
6506                         kvmalloc(rpc_resp->payload_sz, KSMBD_DEFAULT_GFP);
6507                 if (!aux_payload_buf) {
6508                         err = -ENOMEM;
6509                         goto out;
6510                 }
6511
6512                 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
6513
6514                 nbytes = rpc_resp->payload_sz;
6515                 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6516                                              offsetof(struct smb2_read_rsp, Buffer),
6517                                              aux_payload_buf, nbytes);
6518                 if (err) {
6519                         kvfree(aux_payload_buf);
6520                         goto out;
6521                 }
6522                 kvfree(rpc_resp);
6523         } else {
6524                 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6525                                         offsetof(struct smb2_read_rsp, Buffer));
6526                 if (err)
6527                         goto out;
6528         }
6529
6530         rsp->StructureSize = cpu_to_le16(17);
6531         rsp->DataOffset = 80;
6532         rsp->Reserved = 0;
6533         rsp->DataLength = cpu_to_le32(nbytes);
6534         rsp->DataRemaining = 0;
6535         rsp->Flags = 0;
6536         return 0;
6537
6538 out:
6539         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6540         smb2_set_err_rsp(work);
6541         kvfree(rpc_resp);
6542         return err;
6543 }
6544
6545 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6546                                         struct smb2_buffer_desc_v1 *desc,
6547                                         __le32 Channel,
6548                                         __le16 ChannelInfoLength)
6549 {
6550         unsigned int i, ch_count;
6551
6552         if (work->conn->dialect == SMB30_PROT_ID &&
6553             Channel != SMB2_CHANNEL_RDMA_V1)
6554                 return -EINVAL;
6555
6556         ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6557         if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6558                 for (i = 0; i < ch_count; i++) {
6559                         pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6560                                 i,
6561                                 le32_to_cpu(desc[i].token),
6562                                 le32_to_cpu(desc[i].length));
6563                 }
6564         }
6565         if (!ch_count)
6566                 return -EINVAL;
6567
6568         work->need_invalidate_rkey =
6569                 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6570         if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6571                 work->remote_key = le32_to_cpu(desc->token);
6572         return 0;
6573 }
6574
6575 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6576                                       struct smb2_read_req *req, void *data_buf,
6577                                       size_t length)
6578 {
6579         int err;
6580
6581         err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6582                                     (struct smb2_buffer_desc_v1 *)
6583                                     ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6584                                     le16_to_cpu(req->ReadChannelInfoLength));
6585         if (err)
6586                 return err;
6587
6588         return length;
6589 }
6590
6591 /**
6592  * smb2_read() - handler for smb2 read from file
6593  * @work:       smb work containing read command buffer
6594  *
6595  * Return:      0 on success, otherwise error
6596  */
6597 int smb2_read(struct ksmbd_work *work)
6598 {
6599         struct ksmbd_conn *conn = work->conn;
6600         struct smb2_read_req *req;
6601         struct smb2_read_rsp *rsp;
6602         struct ksmbd_file *fp = NULL;
6603         loff_t offset;
6604         size_t length, mincount;
6605         ssize_t nbytes = 0, remain_bytes = 0;
6606         int err = 0;
6607         bool is_rdma_channel = false;
6608         unsigned int max_read_size = conn->vals->max_read_size;
6609         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6610         void *aux_payload_buf;
6611
6612         ksmbd_debug(SMB, "Received smb2 read request\n");
6613
6614         if (test_share_config_flag(work->tcon->share_conf,
6615                                    KSMBD_SHARE_FLAG_PIPE)) {
6616                 ksmbd_debug(SMB, "IPC pipe read request\n");
6617                 return smb2_read_pipe(work);
6618         }
6619
6620         if (work->next_smb2_rcv_hdr_off) {
6621                 req = ksmbd_req_buf_next(work);
6622                 rsp = ksmbd_resp_buf_next(work);
6623                 if (!has_file_id(req->VolatileFileId)) {
6624                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6625                                         work->compound_fid);
6626                         id = work->compound_fid;
6627                         pid = work->compound_pfid;
6628                 }
6629         } else {
6630                 req = smb2_get_msg(work->request_buf);
6631                 rsp = smb2_get_msg(work->response_buf);
6632         }
6633
6634         if (!has_file_id(id)) {
6635                 id = req->VolatileFileId;
6636                 pid = req->PersistentFileId;
6637         }
6638
6639         if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6640             req->Channel == SMB2_CHANNEL_RDMA_V1) {
6641                 is_rdma_channel = true;
6642                 max_read_size = get_smbd_max_read_write_size();
6643         }
6644
6645         if (is_rdma_channel == true) {
6646                 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6647
6648                 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6649                         err = -EINVAL;
6650                         goto out;
6651                 }
6652                 err = smb2_set_remote_key_for_rdma(work,
6653                                                    (struct smb2_buffer_desc_v1 *)
6654                                                    ((char *)req + ch_offset),
6655                                                    req->Channel,
6656                                                    req->ReadChannelInfoLength);
6657                 if (err)
6658                         goto out;
6659         }
6660
6661         fp = ksmbd_lookup_fd_slow(work, id, pid);
6662         if (!fp) {
6663                 err = -ENOENT;
6664                 goto out;
6665         }
6666
6667         if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6668                 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6669                 err = -EACCES;
6670                 goto out;
6671         }
6672
6673         offset = le64_to_cpu(req->Offset);
6674         if (offset < 0) {
6675                 err = -EINVAL;
6676                 goto out;
6677         }
6678         length = le32_to_cpu(req->Length);
6679         mincount = le32_to_cpu(req->MinimumCount);
6680
6681         if (length > max_read_size) {
6682                 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6683                             max_read_size);
6684                 err = -EINVAL;
6685                 goto out;
6686         }
6687
6688         ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6689                     fp->filp, offset, length);
6690
6691         aux_payload_buf = kvzalloc(ALIGN(length, 8), KSMBD_DEFAULT_GFP);
6692         if (!aux_payload_buf) {
6693                 err = -ENOMEM;
6694                 goto out;
6695         }
6696
6697         nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
6698         if (nbytes < 0) {
6699                 err = nbytes;
6700                 goto out;
6701         }
6702
6703         if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6704                 kvfree(aux_payload_buf);
6705                 rsp->hdr.Status = STATUS_END_OF_FILE;
6706                 smb2_set_err_rsp(work);
6707                 ksmbd_fd_put(work, fp);
6708                 return 0;
6709         }
6710
6711         ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6712                     nbytes, offset, mincount);
6713
6714         if (is_rdma_channel == true) {
6715                 /* write data to the client using rdma channel */
6716                 remain_bytes = smb2_read_rdma_channel(work, req,
6717                                                       aux_payload_buf,
6718                                                       nbytes);
6719                 kvfree(aux_payload_buf);
6720                 aux_payload_buf = NULL;
6721                 nbytes = 0;
6722                 if (remain_bytes < 0) {
6723                         err = (int)remain_bytes;
6724                         goto out;
6725                 }
6726         }
6727
6728         rsp->StructureSize = cpu_to_le16(17);
6729         rsp->DataOffset = 80;
6730         rsp->Reserved = 0;
6731         rsp->DataLength = cpu_to_le32(nbytes);
6732         rsp->DataRemaining = cpu_to_le32(remain_bytes);
6733         rsp->Flags = 0;
6734         err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6735                                      offsetof(struct smb2_read_rsp, Buffer),
6736                                      aux_payload_buf, nbytes);
6737         if (err) {
6738                 kvfree(aux_payload_buf);
6739                 goto out;
6740         }
6741         ksmbd_fd_put(work, fp);
6742         return 0;
6743
6744 out:
6745         if (err) {
6746                 if (err == -EISDIR)
6747                         rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6748                 else if (err == -EAGAIN)
6749                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6750                 else if (err == -ENOENT)
6751                         rsp->hdr.Status = STATUS_FILE_CLOSED;
6752                 else if (err == -EACCES)
6753                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
6754                 else if (err == -ESHARE)
6755                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6756                 else if (err == -EINVAL)
6757                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6758                 else
6759                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6760
6761                 smb2_set_err_rsp(work);
6762         }
6763         ksmbd_fd_put(work, fp);
6764         return err;
6765 }
6766
6767 /**
6768  * smb2_write_pipe() - handler for smb2 write on IPC pipe
6769  * @work:       smb work containing write IPC pipe command buffer
6770  *
6771  * Return:      0 on success, otherwise error
6772  */
6773 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6774 {
6775         struct smb2_write_req *req;
6776         struct smb2_write_rsp *rsp;
6777         struct ksmbd_rpc_command *rpc_resp;
6778         u64 id = 0;
6779         int err = 0, ret = 0;
6780         char *data_buf;
6781         size_t length;
6782
6783         WORK_BUFFERS(work, req, rsp);
6784
6785         length = le32_to_cpu(req->Length);
6786         id = req->VolatileFileId;
6787
6788         if ((u64)le16_to_cpu(req->DataOffset) + length >
6789             get_rfc1002_len(work->request_buf)) {
6790                 pr_err("invalid write data offset %u, smb_len %u\n",
6791                        le16_to_cpu(req->DataOffset),
6792                        get_rfc1002_len(work->request_buf));
6793                 err = -EINVAL;
6794                 goto out;
6795         }
6796
6797         data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6798                            le16_to_cpu(req->DataOffset));
6799
6800         rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6801         if (rpc_resp) {
6802                 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6803                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6804                         kvfree(rpc_resp);
6805                         smb2_set_err_rsp(work);
6806                         return -EOPNOTSUPP;
6807                 }
6808                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6809                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6810                         smb2_set_err_rsp(work);
6811                         kvfree(rpc_resp);
6812                         return ret;
6813                 }
6814                 kvfree(rpc_resp);
6815         }
6816
6817         rsp->StructureSize = cpu_to_le16(17);
6818         rsp->DataOffset = 0;
6819         rsp->Reserved = 0;
6820         rsp->DataLength = cpu_to_le32(length);
6821         rsp->DataRemaining = 0;
6822         rsp->Reserved2 = 0;
6823         err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6824                                 offsetof(struct smb2_write_rsp, Buffer));
6825 out:
6826         if (err) {
6827                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6828                 smb2_set_err_rsp(work);
6829         }
6830
6831         return err;
6832 }
6833
6834 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6835                                        struct smb2_write_req *req,
6836                                        struct ksmbd_file *fp,
6837                                        loff_t offset, size_t length, bool sync)
6838 {
6839         char *data_buf;
6840         int ret;
6841         ssize_t nbytes;
6842
6843         data_buf = kvzalloc(length, KSMBD_DEFAULT_GFP);
6844         if (!data_buf)
6845                 return -ENOMEM;
6846
6847         ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6848                                    (struct smb2_buffer_desc_v1 *)
6849                                    ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6850                                    le16_to_cpu(req->WriteChannelInfoLength));
6851         if (ret < 0) {
6852                 kvfree(data_buf);
6853                 return ret;
6854         }
6855
6856         ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6857         kvfree(data_buf);
6858         if (ret < 0)
6859                 return ret;
6860
6861         return nbytes;
6862 }
6863
6864 /**
6865  * smb2_write() - handler for smb2 write from file
6866  * @work:       smb work containing write command buffer
6867  *
6868  * Return:      0 on success, otherwise error
6869  */
6870 int smb2_write(struct ksmbd_work *work)
6871 {
6872         struct smb2_write_req *req;
6873         struct smb2_write_rsp *rsp;
6874         struct ksmbd_file *fp = NULL;
6875         loff_t offset;
6876         size_t length;
6877         ssize_t nbytes;
6878         char *data_buf;
6879         bool writethrough = false, is_rdma_channel = false;
6880         int err = 0;
6881         unsigned int max_write_size = work->conn->vals->max_write_size;
6882
6883         ksmbd_debug(SMB, "Received smb2 write request\n");
6884
6885         WORK_BUFFERS(work, req, rsp);
6886
6887         if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6888                 ksmbd_debug(SMB, "IPC pipe write request\n");
6889                 return smb2_write_pipe(work);
6890         }
6891
6892         offset = le64_to_cpu(req->Offset);
6893         if (offset < 0)
6894                 return -EINVAL;
6895         length = le32_to_cpu(req->Length);
6896
6897         if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6898             req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6899                 is_rdma_channel = true;
6900                 max_write_size = get_smbd_max_read_write_size();
6901                 length = le32_to_cpu(req->RemainingBytes);
6902         }
6903
6904         if (is_rdma_channel == true) {
6905                 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6906
6907                 if (req->Length != 0 || req->DataOffset != 0 ||
6908                     ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6909                         err = -EINVAL;
6910                         goto out;
6911                 }
6912                 err = smb2_set_remote_key_for_rdma(work,
6913                                                    (struct smb2_buffer_desc_v1 *)
6914                                                    ((char *)req + ch_offset),
6915                                                    req->Channel,
6916                                                    req->WriteChannelInfoLength);
6917                 if (err)
6918                         goto out;
6919         }
6920
6921         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6922                 ksmbd_debug(SMB, "User does not have write permission\n");
6923                 err = -EACCES;
6924                 goto out;
6925         }
6926
6927         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6928         if (!fp) {
6929                 err = -ENOENT;
6930                 goto out;
6931         }
6932
6933         if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6934                 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6935                 err = -EACCES;
6936                 goto out;
6937         }
6938
6939         if (length > max_write_size) {
6940                 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6941                             max_write_size);
6942                 err = -EINVAL;
6943                 goto out;
6944         }
6945
6946         ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6947         if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6948                 writethrough = true;
6949
6950         if (is_rdma_channel == false) {
6951                 if (le16_to_cpu(req->DataOffset) <
6952                     offsetof(struct smb2_write_req, Buffer)) {
6953                         err = -EINVAL;
6954                         goto out;
6955                 }
6956
6957                 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6958                                     le16_to_cpu(req->DataOffset));
6959
6960                 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6961                             fp->filp, offset, length);
6962                 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6963                                       writethrough, &nbytes);
6964                 if (err < 0)
6965                         goto out;
6966         } else {
6967                 /* read data from the client using rdma channel, and
6968                  * write the data.
6969                  */
6970                 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6971                                                  writethrough);
6972                 if (nbytes < 0) {
6973                         err = (int)nbytes;
6974                         goto out;
6975                 }
6976         }
6977
6978         rsp->StructureSize = cpu_to_le16(17);
6979         rsp->DataOffset = 0;
6980         rsp->Reserved = 0;
6981         rsp->DataLength = cpu_to_le32(nbytes);
6982         rsp->DataRemaining = 0;
6983         rsp->Reserved2 = 0;
6984         err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
6985         if (err)
6986                 goto out;
6987         ksmbd_fd_put(work, fp);
6988         return 0;
6989
6990 out:
6991         if (err == -EAGAIN)
6992                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6993         else if (err == -ENOSPC || err == -EFBIG)
6994                 rsp->hdr.Status = STATUS_DISK_FULL;
6995         else if (err == -ENOENT)
6996                 rsp->hdr.Status = STATUS_FILE_CLOSED;
6997         else if (err == -EACCES)
6998                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6999         else if (err == -ESHARE)
7000                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
7001         else if (err == -EINVAL)
7002                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7003         else
7004                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
7005
7006         smb2_set_err_rsp(work);
7007         ksmbd_fd_put(work, fp);
7008         return err;
7009 }
7010
7011 /**
7012  * smb2_flush() - handler for smb2 flush file - fsync
7013  * @work:       smb work containing flush command buffer
7014  *
7015  * Return:      0 on success, otherwise error
7016  */
7017 int smb2_flush(struct ksmbd_work *work)
7018 {
7019         struct smb2_flush_req *req;
7020         struct smb2_flush_rsp *rsp;
7021         int err;
7022
7023         WORK_BUFFERS(work, req, rsp);
7024
7025         ksmbd_debug(SMB, "Received smb2 flush request(fid : %llu)\n", req->VolatileFileId);
7026
7027         err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
7028         if (err)
7029                 goto out;
7030
7031         rsp->StructureSize = cpu_to_le16(4);
7032         rsp->Reserved = 0;
7033         return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
7034
7035 out:
7036         rsp->hdr.Status = STATUS_INVALID_HANDLE;
7037         smb2_set_err_rsp(work);
7038         return err;
7039 }
7040
7041 /**
7042  * smb2_cancel() - handler for smb2 cancel command
7043  * @work:       smb work containing cancel command buffer
7044  *
7045  * Return:      0 on success, otherwise error
7046  */
7047 int smb2_cancel(struct ksmbd_work *work)
7048 {
7049         struct ksmbd_conn *conn = work->conn;
7050         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
7051         struct smb2_hdr *chdr;
7052         struct ksmbd_work *iter;
7053         struct list_head *command_list;
7054
7055         if (work->next_smb2_rcv_hdr_off)
7056                 hdr = ksmbd_resp_buf_next(work);
7057
7058         ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
7059                     hdr->MessageId, hdr->Flags);
7060
7061         if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
7062                 command_list = &conn->async_requests;
7063
7064                 spin_lock(&conn->request_lock);
7065                 list_for_each_entry(iter, command_list,
7066                                     async_request_entry) {
7067                         chdr = smb2_get_msg(iter->request_buf);
7068
7069                         if (iter->async_id !=
7070                             le64_to_cpu(hdr->Id.AsyncId))
7071                                 continue;
7072
7073                         ksmbd_debug(SMB,
7074                                     "smb2 with AsyncId %llu cancelled command = 0x%x\n",
7075                                     le64_to_cpu(hdr->Id.AsyncId),
7076                                     le16_to_cpu(chdr->Command));
7077                         iter->state = KSMBD_WORK_CANCELLED;
7078                         if (iter->cancel_fn)
7079                                 iter->cancel_fn(iter->cancel_argv);
7080                         break;
7081                 }
7082                 spin_unlock(&conn->request_lock);
7083         } else {
7084                 command_list = &conn->requests;
7085
7086                 spin_lock(&conn->request_lock);
7087                 list_for_each_entry(iter, command_list, request_entry) {
7088                         chdr = smb2_get_msg(iter->request_buf);
7089
7090                         if (chdr->MessageId != hdr->MessageId ||
7091                             iter == work)
7092                                 continue;
7093
7094                         ksmbd_debug(SMB,
7095                                     "smb2 with mid %llu cancelled command = 0x%x\n",
7096                                     le64_to_cpu(hdr->MessageId),
7097                                     le16_to_cpu(chdr->Command));
7098                         iter->state = KSMBD_WORK_CANCELLED;
7099                         break;
7100                 }
7101                 spin_unlock(&conn->request_lock);
7102         }
7103
7104         /* For SMB2_CANCEL command itself send no response*/
7105         work->send_no_response = 1;
7106         return 0;
7107 }
7108
7109 struct file_lock *smb_flock_init(struct file *f)
7110 {
7111         struct file_lock *fl;
7112
7113         fl = locks_alloc_lock();
7114         if (!fl)
7115                 goto out;
7116
7117         locks_init_lock(fl);
7118
7119         fl->c.flc_owner = f;
7120         fl->c.flc_pid = current->tgid;
7121         fl->c.flc_file = f;
7122         fl->c.flc_flags = FL_POSIX;
7123         fl->fl_ops = NULL;
7124         fl->fl_lmops = NULL;
7125
7126 out:
7127         return fl;
7128 }
7129
7130 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
7131 {
7132         int cmd = -EINVAL;
7133
7134         /* Checking for wrong flag combination during lock request*/
7135         switch (flags) {
7136         case SMB2_LOCKFLAG_SHARED:
7137                 ksmbd_debug(SMB, "received shared request\n");
7138                 cmd = F_SETLKW;
7139                 flock->c.flc_type = F_RDLCK;
7140                 flock->c.flc_flags |= FL_SLEEP;
7141                 break;
7142         case SMB2_LOCKFLAG_EXCLUSIVE:
7143                 ksmbd_debug(SMB, "received exclusive request\n");
7144                 cmd = F_SETLKW;
7145                 flock->c.flc_type = F_WRLCK;
7146                 flock->c.flc_flags |= FL_SLEEP;
7147                 break;
7148         case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7149                 ksmbd_debug(SMB,
7150                             "received shared & fail immediately request\n");
7151                 cmd = F_SETLK;
7152                 flock->c.flc_type = F_RDLCK;
7153                 break;
7154         case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7155                 ksmbd_debug(SMB,
7156                             "received exclusive & fail immediately request\n");
7157                 cmd = F_SETLK;
7158                 flock->c.flc_type = F_WRLCK;
7159                 break;
7160         case SMB2_LOCKFLAG_UNLOCK:
7161                 ksmbd_debug(SMB, "received unlock request\n");
7162                 flock->c.flc_type = F_UNLCK;
7163                 cmd = F_SETLK;
7164                 break;
7165         }
7166
7167         return cmd;
7168 }
7169
7170 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
7171                                          unsigned int cmd, int flags,
7172                                          struct list_head *lock_list)
7173 {
7174         struct ksmbd_lock *lock;
7175
7176         lock = kzalloc(sizeof(struct ksmbd_lock), KSMBD_DEFAULT_GFP);
7177         if (!lock)
7178                 return NULL;
7179
7180         lock->cmd = cmd;
7181         lock->fl = flock;
7182         lock->start = flock->fl_start;
7183         lock->end = flock->fl_end;
7184         lock->flags = flags;
7185         if (lock->start == lock->end)
7186                 lock->zero_len = 1;
7187         INIT_LIST_HEAD(&lock->clist);
7188         INIT_LIST_HEAD(&lock->flist);
7189         INIT_LIST_HEAD(&lock->llist);
7190         list_add_tail(&lock->llist, lock_list);
7191
7192         return lock;
7193 }
7194
7195 static void smb2_remove_blocked_lock(void **argv)
7196 {
7197         struct file_lock *flock = (struct file_lock *)argv[0];
7198
7199         ksmbd_vfs_posix_lock_unblock(flock);
7200         locks_wake_up(flock);
7201 }
7202
7203 static inline bool lock_defer_pending(struct file_lock *fl)
7204 {
7205         /* check pending lock waiters */
7206         return waitqueue_active(&fl->c.flc_wait);
7207 }
7208
7209 /**
7210  * smb2_lock() - handler for smb2 file lock command
7211  * @work:       smb work containing lock command buffer
7212  *
7213  * Return:      0 on success, otherwise error
7214  */
7215 int smb2_lock(struct ksmbd_work *work)
7216 {
7217         struct smb2_lock_req *req;
7218         struct smb2_lock_rsp *rsp;
7219         struct smb2_lock_element *lock_ele;
7220         struct ksmbd_file *fp = NULL;
7221         struct file_lock *flock = NULL;
7222         struct file *filp = NULL;
7223         int lock_count;
7224         int flags = 0;
7225         int cmd = 0;
7226         int err = -EIO, i, rc = 0;
7227         u64 lock_start, lock_length;
7228         struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
7229         struct ksmbd_conn *conn;
7230         int nolock = 0;
7231         LIST_HEAD(lock_list);
7232         LIST_HEAD(rollback_list);
7233         int prior_lock = 0;
7234
7235         WORK_BUFFERS(work, req, rsp);
7236
7237         ksmbd_debug(SMB, "Received smb2 lock request\n");
7238         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7239         if (!fp) {
7240                 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
7241                 err = -ENOENT;
7242                 goto out2;
7243         }
7244
7245         filp = fp->filp;
7246         lock_count = le16_to_cpu(req->LockCount);
7247         lock_ele = req->locks;
7248
7249         ksmbd_debug(SMB, "lock count is %d\n", lock_count);
7250         if (!lock_count) {
7251                 err = -EINVAL;
7252                 goto out2;
7253         }
7254
7255         for (i = 0; i < lock_count; i++) {
7256                 flags = le32_to_cpu(lock_ele[i].Flags);
7257
7258                 flock = smb_flock_init(filp);
7259                 if (!flock)
7260                         goto out;
7261
7262                 cmd = smb2_set_flock_flags(flock, flags);
7263
7264                 lock_start = le64_to_cpu(lock_ele[i].Offset);
7265                 lock_length = le64_to_cpu(lock_ele[i].Length);
7266                 if (lock_start > U64_MAX - lock_length) {
7267                         pr_err("Invalid lock range requested\n");
7268                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7269                         locks_free_lock(flock);
7270                         goto out;
7271                 }
7272
7273                 if (lock_start > OFFSET_MAX)
7274                         flock->fl_start = OFFSET_MAX;
7275                 else
7276                         flock->fl_start = lock_start;
7277
7278                 lock_length = le64_to_cpu(lock_ele[i].Length);
7279                 if (lock_length > OFFSET_MAX - flock->fl_start)
7280                         lock_length = OFFSET_MAX - flock->fl_start;
7281
7282                 flock->fl_end = flock->fl_start + lock_length;
7283
7284                 if (flock->fl_end < flock->fl_start) {
7285                         ksmbd_debug(SMB,
7286                                     "the end offset(%llx) is smaller than the start offset(%llx)\n",
7287                                     flock->fl_end, flock->fl_start);
7288                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7289                         locks_free_lock(flock);
7290                         goto out;
7291                 }
7292
7293                 /* Check conflict locks in one request */
7294                 list_for_each_entry(cmp_lock, &lock_list, llist) {
7295                         if (cmp_lock->fl->fl_start <= flock->fl_start &&
7296                             cmp_lock->fl->fl_end >= flock->fl_end) {
7297                                 if (cmp_lock->fl->c.flc_type != F_UNLCK &&
7298                                     flock->c.flc_type != F_UNLCK) {
7299                                         pr_err("conflict two locks in one request\n");
7300                                         err = -EINVAL;
7301                                         locks_free_lock(flock);
7302                                         goto out;
7303                                 }
7304                         }
7305                 }
7306
7307                 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
7308                 if (!smb_lock) {
7309                         err = -EINVAL;
7310                         locks_free_lock(flock);
7311                         goto out;
7312                 }
7313         }
7314
7315         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7316                 if (smb_lock->cmd < 0) {
7317                         err = -EINVAL;
7318                         goto out;
7319                 }
7320
7321                 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
7322                         err = -EINVAL;
7323                         goto out;
7324                 }
7325
7326                 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
7327                      smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
7328                     (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
7329                      !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
7330                         err = -EINVAL;
7331                         goto out;
7332                 }
7333
7334                 prior_lock = smb_lock->flags;
7335
7336                 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
7337                     !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
7338                         goto no_check_cl;
7339
7340                 nolock = 1;
7341                 /* check locks in connection list */
7342                 down_read(&conn_list_lock);
7343                 list_for_each_entry(conn, &conn_list, conns_list) {
7344                         spin_lock(&conn->llist_lock);
7345                         list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
7346                                 if (file_inode(cmp_lock->fl->c.flc_file) !=
7347                                     file_inode(smb_lock->fl->c.flc_file))
7348                                         continue;
7349
7350                                 if (lock_is_unlock(smb_lock->fl)) {
7351                                         if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file &&
7352                                             cmp_lock->start == smb_lock->start &&
7353                                             cmp_lock->end == smb_lock->end &&
7354                                             !lock_defer_pending(cmp_lock->fl)) {
7355                                                 nolock = 0;
7356                                                 list_del(&cmp_lock->flist);
7357                                                 list_del(&cmp_lock->clist);
7358                                                 spin_unlock(&conn->llist_lock);
7359                                                 up_read(&conn_list_lock);
7360
7361                                                 locks_free_lock(cmp_lock->fl);
7362                                                 kfree(cmp_lock);
7363                                                 goto out_check_cl;
7364                                         }
7365                                         continue;
7366                                 }
7367
7368                                 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file) {
7369                                         if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
7370                                                 continue;
7371                                 } else {
7372                                         if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
7373                                                 continue;
7374                                 }
7375
7376                                 /* check zero byte lock range */
7377                                 if (cmp_lock->zero_len && !smb_lock->zero_len &&
7378                                     cmp_lock->start > smb_lock->start &&
7379                                     cmp_lock->start < smb_lock->end) {
7380                                         spin_unlock(&conn->llist_lock);
7381                                         up_read(&conn_list_lock);
7382                                         pr_err("previous lock conflict with zero byte lock range\n");
7383                                         goto out;
7384                                 }
7385
7386                                 if (smb_lock->zero_len && !cmp_lock->zero_len &&
7387                                     smb_lock->start > cmp_lock->start &&
7388                                     smb_lock->start < cmp_lock->end) {
7389                                         spin_unlock(&conn->llist_lock);
7390                                         up_read(&conn_list_lock);
7391                                         pr_err("current lock conflict with zero byte lock range\n");
7392                                         goto out;
7393                                 }
7394
7395                                 if (((cmp_lock->start <= smb_lock->start &&
7396                                       cmp_lock->end > smb_lock->start) ||
7397                                      (cmp_lock->start < smb_lock->end &&
7398                                       cmp_lock->end >= smb_lock->end)) &&
7399                                     !cmp_lock->zero_len && !smb_lock->zero_len) {
7400                                         spin_unlock(&conn->llist_lock);
7401                                         up_read(&conn_list_lock);
7402                                         pr_err("Not allow lock operation on exclusive lock range\n");
7403                                         goto out;
7404                                 }
7405                         }
7406                         spin_unlock(&conn->llist_lock);
7407                 }
7408                 up_read(&conn_list_lock);
7409 out_check_cl:
7410                 if (lock_is_unlock(smb_lock->fl) && nolock) {
7411                         pr_err("Try to unlock nolocked range\n");
7412                         rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7413                         goto out;
7414                 }
7415
7416 no_check_cl:
7417                 if (smb_lock->zero_len) {
7418                         err = 0;
7419                         goto skip;
7420                 }
7421
7422                 flock = smb_lock->fl;
7423                 list_del(&smb_lock->llist);
7424 retry:
7425                 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7426 skip:
7427                 if (flags & SMB2_LOCKFLAG_UNLOCK) {
7428                         if (!rc) {
7429                                 ksmbd_debug(SMB, "File unlocked\n");
7430                         } else if (rc == -ENOENT) {
7431                                 rsp->hdr.Status = STATUS_NOT_LOCKED;
7432                                 goto out;
7433                         }
7434                         locks_free_lock(flock);
7435                         kfree(smb_lock);
7436                 } else {
7437                         if (rc == FILE_LOCK_DEFERRED) {
7438                                 void **argv;
7439
7440                                 ksmbd_debug(SMB,
7441                                             "would have to wait for getting lock\n");
7442                                 list_add(&smb_lock->llist, &rollback_list);
7443
7444                                 argv = kmalloc(sizeof(void *), KSMBD_DEFAULT_GFP);
7445                                 if (!argv) {
7446                                         err = -ENOMEM;
7447                                         goto out;
7448                                 }
7449                                 argv[0] = flock;
7450
7451                                 rc = setup_async_work(work,
7452                                                       smb2_remove_blocked_lock,
7453                                                       argv);
7454                                 if (rc) {
7455                                         kfree(argv);
7456                                         err = -ENOMEM;
7457                                         goto out;
7458                                 }
7459                                 spin_lock(&fp->f_lock);
7460                                 list_add(&work->fp_entry, &fp->blocked_works);
7461                                 spin_unlock(&fp->f_lock);
7462
7463                                 smb2_send_interim_resp(work, STATUS_PENDING);
7464
7465                                 ksmbd_vfs_posix_lock_wait(flock);
7466
7467                                 spin_lock(&fp->f_lock);
7468                                 list_del(&work->fp_entry);
7469                                 spin_unlock(&fp->f_lock);
7470
7471                                 if (work->state != KSMBD_WORK_ACTIVE) {
7472                                         list_del(&smb_lock->llist);
7473                                         locks_free_lock(flock);
7474
7475                                         if (work->state == KSMBD_WORK_CANCELLED) {
7476                                                 rsp->hdr.Status =
7477                                                         STATUS_CANCELLED;
7478                                                 kfree(smb_lock);
7479                                                 smb2_send_interim_resp(work,
7480                                                                        STATUS_CANCELLED);
7481                                                 work->send_no_response = 1;
7482                                                 goto out;
7483                                         }
7484
7485                                         rsp->hdr.Status =
7486                                                 STATUS_RANGE_NOT_LOCKED;
7487                                         kfree(smb_lock);
7488                                         goto out2;
7489                                 }
7490
7491                                 list_del(&smb_lock->llist);
7492                                 release_async_work(work);
7493                                 goto retry;
7494                         } else if (!rc) {
7495                                 list_add(&smb_lock->llist, &rollback_list);
7496                                 spin_lock(&work->conn->llist_lock);
7497                                 list_add_tail(&smb_lock->clist,
7498                                               &work->conn->lock_list);
7499                                 list_add_tail(&smb_lock->flist,
7500                                               &fp->lock_list);
7501                                 spin_unlock(&work->conn->llist_lock);
7502                                 ksmbd_debug(SMB, "successful in taking lock\n");
7503                         } else {
7504                                 goto out;
7505                         }
7506                 }
7507         }
7508
7509         if (atomic_read(&fp->f_ci->op_count) > 1)
7510                 smb_break_all_oplock(work, fp);
7511
7512         rsp->StructureSize = cpu_to_le16(4);
7513         ksmbd_debug(SMB, "successful in taking lock\n");
7514         rsp->hdr.Status = STATUS_SUCCESS;
7515         rsp->Reserved = 0;
7516         err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
7517         if (err)
7518                 goto out;
7519
7520         ksmbd_fd_put(work, fp);
7521         return 0;
7522
7523 out:
7524         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7525                 locks_free_lock(smb_lock->fl);
7526                 list_del(&smb_lock->llist);
7527                 kfree(smb_lock);
7528         }
7529
7530         list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7531                 struct file_lock *rlock = NULL;
7532
7533                 rlock = smb_flock_init(filp);
7534                 rlock->c.flc_type = F_UNLCK;
7535                 rlock->fl_start = smb_lock->start;
7536                 rlock->fl_end = smb_lock->end;
7537
7538                 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7539                 if (rc)
7540                         pr_err("rollback unlock fail : %d\n", rc);
7541
7542                 list_del(&smb_lock->llist);
7543                 spin_lock(&work->conn->llist_lock);
7544                 if (!list_empty(&smb_lock->flist))
7545                         list_del(&smb_lock->flist);
7546                 list_del(&smb_lock->clist);
7547                 spin_unlock(&work->conn->llist_lock);
7548
7549                 locks_free_lock(smb_lock->fl);
7550                 locks_free_lock(rlock);
7551                 kfree(smb_lock);
7552         }
7553 out2:
7554         ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7555
7556         if (!rsp->hdr.Status) {
7557                 if (err == -EINVAL)
7558                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7559                 else if (err == -ENOMEM)
7560                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7561                 else if (err == -ENOENT)
7562                         rsp->hdr.Status = STATUS_FILE_CLOSED;
7563                 else
7564                         rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7565         }
7566
7567         smb2_set_err_rsp(work);
7568         ksmbd_fd_put(work, fp);
7569         return err;
7570 }
7571
7572 static int fsctl_copychunk(struct ksmbd_work *work,
7573                            struct copychunk_ioctl_req *ci_req,
7574                            unsigned int cnt_code,
7575                            unsigned int input_count,
7576                            unsigned long long volatile_id,
7577                            unsigned long long persistent_id,
7578                            struct smb2_ioctl_rsp *rsp)
7579 {
7580         struct copychunk_ioctl_rsp *ci_rsp;
7581         struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7582         struct srv_copychunk *chunks;
7583         unsigned int i, chunk_count, chunk_count_written = 0;
7584         unsigned int chunk_size_written = 0;
7585         loff_t total_size_written = 0;
7586         int ret = 0;
7587
7588         ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7589
7590         rsp->VolatileFileId = volatile_id;
7591         rsp->PersistentFileId = persistent_id;
7592         ci_rsp->ChunksWritten =
7593                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7594         ci_rsp->ChunkBytesWritten =
7595                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7596         ci_rsp->TotalBytesWritten =
7597                 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7598
7599         chunk_count = le32_to_cpu(ci_req->ChunkCount);
7600         if (chunk_count == 0)
7601                 goto out;
7602         total_size_written = 0;
7603
7604         /* verify the SRV_COPYCHUNK_COPY packet */
7605         if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7606             input_count < struct_size(ci_req, Chunks, chunk_count)) {
7607                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7608                 return -EINVAL;
7609         }
7610
7611         chunks = &ci_req->Chunks[0];
7612         for (i = 0; i < chunk_count; i++) {
7613                 if (le32_to_cpu(chunks[i].Length) == 0 ||
7614                     le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7615                         break;
7616                 total_size_written += le32_to_cpu(chunks[i].Length);
7617         }
7618
7619         if (i < chunk_count ||
7620             total_size_written > ksmbd_server_side_copy_max_total_size()) {
7621                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7622                 return -EINVAL;
7623         }
7624
7625         src_fp = ksmbd_lookup_foreign_fd(work,
7626                                          le64_to_cpu(ci_req->ResumeKey[0]));
7627         dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7628         ret = -EINVAL;
7629         if (!src_fp ||
7630             src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7631                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7632                 goto out;
7633         }
7634
7635         if (!dst_fp) {
7636                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7637                 goto out;
7638         }
7639
7640         /*
7641          * FILE_READ_DATA should only be included in
7642          * the FSCTL_COPYCHUNK case
7643          */
7644         if (cnt_code == FSCTL_COPYCHUNK &&
7645             !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7646                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7647                 goto out;
7648         }
7649
7650         ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7651                                          chunks, chunk_count,
7652                                          &chunk_count_written,
7653                                          &chunk_size_written,
7654                                          &total_size_written);
7655         if (ret < 0) {
7656                 if (ret == -EACCES)
7657                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
7658                 if (ret == -EAGAIN)
7659                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7660                 else if (ret == -EBADF)
7661                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
7662                 else if (ret == -EFBIG || ret == -ENOSPC)
7663                         rsp->hdr.Status = STATUS_DISK_FULL;
7664                 else if (ret == -EINVAL)
7665                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7666                 else if (ret == -EISDIR)
7667                         rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7668                 else if (ret == -E2BIG)
7669                         rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7670                 else
7671                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7672         }
7673
7674         ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7675         ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7676         ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7677 out:
7678         ksmbd_fd_put(work, src_fp);
7679         ksmbd_fd_put(work, dst_fp);
7680         return ret;
7681 }
7682
7683 static __be32 idev_ipv4_address(struct in_device *idev)
7684 {
7685         __be32 addr = 0;
7686
7687         struct in_ifaddr *ifa;
7688
7689         rcu_read_lock();
7690         in_dev_for_each_ifa_rcu(ifa, idev) {
7691                 if (ifa->ifa_flags & IFA_F_SECONDARY)
7692                         continue;
7693
7694                 addr = ifa->ifa_address;
7695                 break;
7696         }
7697         rcu_read_unlock();
7698         return addr;
7699 }
7700
7701 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7702                                         struct smb2_ioctl_rsp *rsp,
7703                                         unsigned int out_buf_len)
7704 {
7705         struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7706         int nbytes = 0;
7707         struct net_device *netdev;
7708         struct sockaddr_storage_rsp *sockaddr_storage;
7709         unsigned int flags;
7710         unsigned long long speed;
7711
7712         rtnl_lock();
7713         for_each_netdev(&init_net, netdev) {
7714                 bool ipv4_set = false;
7715
7716                 if (netdev->type == ARPHRD_LOOPBACK)
7717                         continue;
7718
7719                 flags = dev_get_flags(netdev);
7720                 if (!(flags & IFF_RUNNING))
7721                         continue;
7722 ipv6_retry:
7723                 if (out_buf_len <
7724                     nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7725                         rtnl_unlock();
7726                         return -ENOSPC;
7727                 }
7728
7729                 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7730                                 &rsp->Buffer[nbytes];
7731                 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7732
7733                 nii_rsp->Capability = 0;
7734                 if (netdev->real_num_tx_queues > 1)
7735                         nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7736                 if (ksmbd_rdma_capable_netdev(netdev))
7737                         nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7738
7739                 nii_rsp->Next = cpu_to_le32(152);
7740                 nii_rsp->Reserved = 0;
7741
7742                 if (netdev->ethtool_ops->get_link_ksettings) {
7743                         struct ethtool_link_ksettings cmd;
7744
7745                         netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7746                         speed = cmd.base.speed;
7747                 } else {
7748                         ksmbd_debug(SMB, "%s %s\n", netdev->name,
7749                                     "speed is unknown, defaulting to 1Gb/sec");
7750                         speed = SPEED_1000;
7751                 }
7752
7753                 speed *= 1000000;
7754                 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7755
7756                 sockaddr_storage = (struct sockaddr_storage_rsp *)
7757                                         nii_rsp->SockAddr_Storage;
7758                 memset(sockaddr_storage, 0, 128);
7759
7760                 if (!ipv4_set) {
7761                         struct in_device *idev;
7762
7763                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7764                         sockaddr_storage->addr4.Port = 0;
7765
7766                         idev = __in_dev_get_rtnl(netdev);
7767                         if (!idev)
7768                                 continue;
7769                         sockaddr_storage->addr4.IPv4address =
7770                                                 idev_ipv4_address(idev);
7771                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7772                         ipv4_set = true;
7773                         goto ipv6_retry;
7774                 } else {
7775                         struct inet6_dev *idev6;
7776                         struct inet6_ifaddr *ifa;
7777                         __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7778
7779                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7780                         sockaddr_storage->addr6.Port = 0;
7781                         sockaddr_storage->addr6.FlowInfo = 0;
7782
7783                         idev6 = __in6_dev_get(netdev);
7784                         if (!idev6)
7785                                 continue;
7786
7787                         list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7788                                 if (ifa->flags & (IFA_F_TENTATIVE |
7789                                                         IFA_F_DEPRECATED))
7790                                         continue;
7791                                 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7792                                 break;
7793                         }
7794                         sockaddr_storage->addr6.ScopeId = 0;
7795                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7796                 }
7797         }
7798         rtnl_unlock();
7799
7800         /* zero if this is last one */
7801         if (nii_rsp)
7802                 nii_rsp->Next = 0;
7803
7804         rsp->PersistentFileId = SMB2_NO_FID;
7805         rsp->VolatileFileId = SMB2_NO_FID;
7806         return nbytes;
7807 }
7808
7809 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7810                                          struct validate_negotiate_info_req *neg_req,
7811                                          struct validate_negotiate_info_rsp *neg_rsp,
7812                                          unsigned int in_buf_len)
7813 {
7814         int ret = 0;
7815         int dialect;
7816
7817         if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7818                         le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7819                 return -EINVAL;
7820
7821         dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7822                                              neg_req->DialectCount);
7823         if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7824                 ret = -EINVAL;
7825                 goto err_out;
7826         }
7827
7828         if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7829                 ret = -EINVAL;
7830                 goto err_out;
7831         }
7832
7833         if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7834                 ret = -EINVAL;
7835                 goto err_out;
7836         }
7837
7838         if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7839                 ret = -EINVAL;
7840                 goto err_out;
7841         }
7842
7843         neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7844         memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7845         neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7846         neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7847 err_out:
7848         return ret;
7849 }
7850
7851 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7852                                         struct file_allocated_range_buffer *qar_req,
7853                                         struct file_allocated_range_buffer *qar_rsp,
7854                                         unsigned int in_count, unsigned int *out_count)
7855 {
7856         struct ksmbd_file *fp;
7857         loff_t start, length;
7858         int ret = 0;
7859
7860         *out_count = 0;
7861         if (in_count == 0)
7862                 return -EINVAL;
7863
7864         start = le64_to_cpu(qar_req->file_offset);
7865         length = le64_to_cpu(qar_req->length);
7866
7867         if (start < 0 || length < 0)
7868                 return -EINVAL;
7869
7870         fp = ksmbd_lookup_fd_fast(work, id);
7871         if (!fp)
7872                 return -ENOENT;
7873
7874         ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7875                                    qar_rsp, in_count, out_count);
7876         if (ret && ret != -E2BIG)
7877                 *out_count = 0;
7878
7879         ksmbd_fd_put(work, fp);
7880         return ret;
7881 }
7882
7883 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7884                                  unsigned int out_buf_len,
7885                                  struct smb2_ioctl_req *req,
7886                                  struct smb2_ioctl_rsp *rsp)
7887 {
7888         struct ksmbd_rpc_command *rpc_resp;
7889         char *data_buf = (char *)req + le32_to_cpu(req->InputOffset);
7890         int nbytes = 0;
7891
7892         rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7893                                    le32_to_cpu(req->InputCount));
7894         if (rpc_resp) {
7895                 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7896                         /*
7897                          * set STATUS_SOME_NOT_MAPPED response
7898                          * for unknown domain sid.
7899                          */
7900                         rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7901                 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7902                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7903                         goto out;
7904                 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7905                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7906                         goto out;
7907                 }
7908
7909                 nbytes = rpc_resp->payload_sz;
7910                 if (rpc_resp->payload_sz > out_buf_len) {
7911                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7912                         nbytes = out_buf_len;
7913                 }
7914
7915                 if (!rpc_resp->payload_sz) {
7916                         rsp->hdr.Status =
7917                                 STATUS_UNEXPECTED_IO_ERROR;
7918                         goto out;
7919                 }
7920
7921                 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7922         }
7923 out:
7924         kvfree(rpc_resp);
7925         return nbytes;
7926 }
7927
7928 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7929                                    struct file_sparse *sparse)
7930 {
7931         struct ksmbd_file *fp;
7932         struct mnt_idmap *idmap;
7933         int ret = 0;
7934         __le32 old_fattr;
7935
7936         fp = ksmbd_lookup_fd_fast(work, id);
7937         if (!fp)
7938                 return -ENOENT;
7939         idmap = file_mnt_idmap(fp->filp);
7940
7941         old_fattr = fp->f_ci->m_fattr;
7942         if (sparse->SetSparse)
7943                 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7944         else
7945                 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7946
7947         if (fp->f_ci->m_fattr != old_fattr &&
7948             test_share_config_flag(work->tcon->share_conf,
7949                                    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7950                 struct xattr_dos_attrib da;
7951
7952                 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
7953                                                      fp->filp->f_path.dentry, &da);
7954                 if (ret <= 0)
7955                         goto out;
7956
7957                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7958                 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
7959                                                      &fp->filp->f_path,
7960                                                      &da, true);
7961                 if (ret)
7962                         fp->f_ci->m_fattr = old_fattr;
7963         }
7964
7965 out:
7966         ksmbd_fd_put(work, fp);
7967         return ret;
7968 }
7969
7970 static int fsctl_request_resume_key(struct ksmbd_work *work,
7971                                     struct smb2_ioctl_req *req,
7972                                     struct resume_key_ioctl_rsp *key_rsp)
7973 {
7974         struct ksmbd_file *fp;
7975
7976         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7977         if (!fp)
7978                 return -ENOENT;
7979
7980         memset(key_rsp, 0, sizeof(*key_rsp));
7981         key_rsp->ResumeKey[0] = req->VolatileFileId;
7982         key_rsp->ResumeKey[1] = req->PersistentFileId;
7983         ksmbd_fd_put(work, fp);
7984
7985         return 0;
7986 }
7987
7988 /**
7989  * smb2_ioctl() - handler for smb2 ioctl command
7990  * @work:       smb work containing ioctl command buffer
7991  *
7992  * Return:      0 on success, otherwise error
7993  */
7994 int smb2_ioctl(struct ksmbd_work *work)
7995 {
7996         struct smb2_ioctl_req *req;
7997         struct smb2_ioctl_rsp *rsp;
7998         unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7999         u64 id = KSMBD_NO_FID;
8000         struct ksmbd_conn *conn = work->conn;
8001         int ret = 0;
8002         char *buffer;
8003
8004         ksmbd_debug(SMB, "Received smb2 ioctl request\n");
8005
8006         if (work->next_smb2_rcv_hdr_off) {
8007                 req = ksmbd_req_buf_next(work);
8008                 rsp = ksmbd_resp_buf_next(work);
8009                 if (!has_file_id(req->VolatileFileId)) {
8010                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
8011                                     work->compound_fid);
8012                         id = work->compound_fid;
8013                 }
8014         } else {
8015                 req = smb2_get_msg(work->request_buf);
8016                 rsp = smb2_get_msg(work->response_buf);
8017         }
8018
8019         if (!has_file_id(id))
8020                 id = req->VolatileFileId;
8021
8022         if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
8023                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
8024                 goto out;
8025         }
8026
8027         buffer = (char *)req + le32_to_cpu(req->InputOffset);
8028
8029         cnt_code = le32_to_cpu(req->CtlCode);
8030         ret = smb2_calc_max_out_buf_len(work, 48,
8031                                         le32_to_cpu(req->MaxOutputResponse));
8032         if (ret < 0) {
8033                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8034                 goto out;
8035         }
8036         out_buf_len = (unsigned int)ret;
8037         in_buf_len = le32_to_cpu(req->InputCount);
8038
8039         switch (cnt_code) {
8040         case FSCTL_DFS_GET_REFERRALS:
8041         case FSCTL_DFS_GET_REFERRALS_EX:
8042                 /* Not support DFS yet */
8043                 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
8044                 goto out;
8045         case FSCTL_CREATE_OR_GET_OBJECT_ID:
8046         {
8047                 struct file_object_buf_type1_ioctl_rsp *obj_buf;
8048
8049                 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
8050                 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
8051                         &rsp->Buffer[0];
8052
8053                 /*
8054                  * TODO: This is dummy implementation to pass smbtorture
8055                  * Need to check correct response later
8056                  */
8057                 memset(obj_buf->ObjectId, 0x0, 16);
8058                 memset(obj_buf->BirthVolumeId, 0x0, 16);
8059                 memset(obj_buf->BirthObjectId, 0x0, 16);
8060                 memset(obj_buf->DomainId, 0x0, 16);
8061
8062                 break;
8063         }
8064         case FSCTL_PIPE_TRANSCEIVE:
8065                 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
8066                 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
8067                 break;
8068         case FSCTL_VALIDATE_NEGOTIATE_INFO:
8069                 if (conn->dialect < SMB30_PROT_ID) {
8070                         ret = -EOPNOTSUPP;
8071                         goto out;
8072                 }
8073
8074                 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
8075                                           Dialects)) {
8076                         ret = -EINVAL;
8077                         goto out;
8078                 }
8079
8080                 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
8081                         ret = -EINVAL;
8082                         goto out;
8083                 }
8084
8085                 ret = fsctl_validate_negotiate_info(conn,
8086                         (struct validate_negotiate_info_req *)buffer,
8087                         (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
8088                         in_buf_len);
8089                 if (ret < 0)
8090                         goto out;
8091
8092                 nbytes = sizeof(struct validate_negotiate_info_rsp);
8093                 rsp->PersistentFileId = SMB2_NO_FID;
8094                 rsp->VolatileFileId = SMB2_NO_FID;
8095                 break;
8096         case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
8097                 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
8098                 if (ret < 0)
8099                         goto out;
8100                 nbytes = ret;
8101                 break;
8102         case FSCTL_REQUEST_RESUME_KEY:
8103                 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
8104                         ret = -EINVAL;
8105                         goto out;
8106                 }
8107
8108                 ret = fsctl_request_resume_key(work, req,
8109                                                (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
8110                 if (ret < 0)
8111                         goto out;
8112                 rsp->PersistentFileId = req->PersistentFileId;
8113                 rsp->VolatileFileId = req->VolatileFileId;
8114                 nbytes = sizeof(struct resume_key_ioctl_rsp);
8115                 break;
8116         case FSCTL_COPYCHUNK:
8117         case FSCTL_COPYCHUNK_WRITE:
8118                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8119                         ksmbd_debug(SMB,
8120                                     "User does not have write permission\n");
8121                         ret = -EACCES;
8122                         goto out;
8123                 }
8124
8125                 if (in_buf_len <= sizeof(struct copychunk_ioctl_req)) {
8126                         ret = -EINVAL;
8127                         goto out;
8128                 }
8129
8130                 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
8131                         ret = -EINVAL;
8132                         goto out;
8133                 }
8134
8135                 nbytes = sizeof(struct copychunk_ioctl_rsp);
8136                 rsp->VolatileFileId = req->VolatileFileId;
8137                 rsp->PersistentFileId = req->PersistentFileId;
8138                 fsctl_copychunk(work,
8139                                 (struct copychunk_ioctl_req *)buffer,
8140                                 le32_to_cpu(req->CtlCode),
8141                                 le32_to_cpu(req->InputCount),
8142                                 req->VolatileFileId,
8143                                 req->PersistentFileId,
8144                                 rsp);
8145                 break;
8146         case FSCTL_SET_SPARSE:
8147                 if (in_buf_len < sizeof(struct file_sparse)) {
8148                         ret = -EINVAL;
8149                         goto out;
8150                 }
8151
8152                 ret = fsctl_set_sparse(work, id, (struct file_sparse *)buffer);
8153                 if (ret < 0)
8154                         goto out;
8155                 break;
8156         case FSCTL_SET_ZERO_DATA:
8157         {
8158                 struct file_zero_data_information *zero_data;
8159                 struct ksmbd_file *fp;
8160                 loff_t off, len, bfz;
8161
8162                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8163                         ksmbd_debug(SMB,
8164                                     "User does not have write permission\n");
8165                         ret = -EACCES;
8166                         goto out;
8167                 }
8168
8169                 if (in_buf_len < sizeof(struct file_zero_data_information)) {
8170                         ret = -EINVAL;
8171                         goto out;
8172                 }
8173
8174                 zero_data =
8175                         (struct file_zero_data_information *)buffer;
8176
8177                 off = le64_to_cpu(zero_data->FileOffset);
8178                 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
8179                 if (off < 0 || bfz < 0 || off > bfz) {
8180                         ret = -EINVAL;
8181                         goto out;
8182                 }
8183
8184                 len = bfz - off;
8185                 if (len) {
8186                         fp = ksmbd_lookup_fd_fast(work, id);
8187                         if (!fp) {
8188                                 ret = -ENOENT;
8189                                 goto out;
8190                         }
8191
8192                         ret = ksmbd_vfs_zero_data(work, fp, off, len);
8193                         ksmbd_fd_put(work, fp);
8194                         if (ret < 0)
8195                                 goto out;
8196                 }
8197                 break;
8198         }
8199         case FSCTL_QUERY_ALLOCATED_RANGES:
8200                 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
8201                         ret = -EINVAL;
8202                         goto out;
8203                 }
8204
8205                 ret = fsctl_query_allocated_ranges(work, id,
8206                         (struct file_allocated_range_buffer *)buffer,
8207                         (struct file_allocated_range_buffer *)&rsp->Buffer[0],
8208                         out_buf_len /
8209                         sizeof(struct file_allocated_range_buffer), &nbytes);
8210                 if (ret == -E2BIG) {
8211                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
8212                 } else if (ret < 0) {
8213                         nbytes = 0;
8214                         goto out;
8215                 }
8216
8217                 nbytes *= sizeof(struct file_allocated_range_buffer);
8218                 break;
8219         case FSCTL_GET_REPARSE_POINT:
8220         {
8221                 struct reparse_data_buffer *reparse_ptr;
8222                 struct ksmbd_file *fp;
8223
8224                 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
8225                 fp = ksmbd_lookup_fd_fast(work, id);
8226                 if (!fp) {
8227                         pr_err("not found fp!!\n");
8228                         ret = -ENOENT;
8229                         goto out;
8230                 }
8231
8232                 reparse_ptr->ReparseTag =
8233                         smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
8234                 reparse_ptr->ReparseDataLength = 0;
8235                 ksmbd_fd_put(work, fp);
8236                 nbytes = sizeof(struct reparse_data_buffer);
8237                 break;
8238         }
8239         case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
8240         {
8241                 struct ksmbd_file *fp_in, *fp_out = NULL;
8242                 struct duplicate_extents_to_file *dup_ext;
8243                 loff_t src_off, dst_off, length, cloned;
8244
8245                 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
8246                         ret = -EINVAL;
8247                         goto out;
8248                 }
8249
8250                 dup_ext = (struct duplicate_extents_to_file *)buffer;
8251
8252                 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
8253                                              dup_ext->PersistentFileHandle);
8254                 if (!fp_in) {
8255                         pr_err("not found file handle in duplicate extent to file\n");
8256                         ret = -ENOENT;
8257                         goto out;
8258                 }
8259
8260                 fp_out = ksmbd_lookup_fd_fast(work, id);
8261                 if (!fp_out) {
8262                         pr_err("not found fp\n");
8263                         ret = -ENOENT;
8264                         goto dup_ext_out;
8265                 }
8266
8267                 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
8268                 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
8269                 length = le64_to_cpu(dup_ext->ByteCount);
8270                 /*
8271                  * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
8272                  * should fall back to vfs_copy_file_range().  This could be
8273                  * beneficial when re-exporting nfs/smb mount, but note that
8274                  * this can result in partial copy that returns an error status.
8275                  * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
8276                  * fall back to vfs_copy_file_range(), should be avoided when
8277                  * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
8278                  */
8279                 cloned = vfs_clone_file_range(fp_in->filp, src_off,
8280                                               fp_out->filp, dst_off, length, 0);
8281                 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
8282                         ret = -EOPNOTSUPP;
8283                         goto dup_ext_out;
8284                 } else if (cloned != length) {
8285                         cloned = vfs_copy_file_range(fp_in->filp, src_off,
8286                                                      fp_out->filp, dst_off,
8287                                                      length, 0);
8288                         if (cloned != length) {
8289                                 if (cloned < 0)
8290                                         ret = cloned;
8291                                 else
8292                                         ret = -EINVAL;
8293                         }
8294                 }
8295
8296 dup_ext_out:
8297                 ksmbd_fd_put(work, fp_in);
8298                 ksmbd_fd_put(work, fp_out);
8299                 if (ret < 0)
8300                         goto out;
8301                 break;
8302         }
8303         default:
8304                 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
8305                             cnt_code);
8306                 ret = -EOPNOTSUPP;
8307                 goto out;
8308         }
8309
8310         rsp->CtlCode = cpu_to_le32(cnt_code);
8311         rsp->InputCount = cpu_to_le32(0);
8312         rsp->InputOffset = cpu_to_le32(112);
8313         rsp->OutputOffset = cpu_to_le32(112);
8314         rsp->OutputCount = cpu_to_le32(nbytes);
8315         rsp->StructureSize = cpu_to_le16(49);
8316         rsp->Reserved = cpu_to_le16(0);
8317         rsp->Flags = cpu_to_le32(0);
8318         rsp->Reserved2 = cpu_to_le32(0);
8319         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
8320         if (!ret)
8321                 return ret;
8322
8323 out:
8324         if (ret == -EACCES)
8325                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
8326         else if (ret == -ENOENT)
8327                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
8328         else if (ret == -EOPNOTSUPP)
8329                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
8330         else if (ret == -ENOSPC)
8331                 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
8332         else if (ret < 0 || rsp->hdr.Status == 0)
8333                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8334         smb2_set_err_rsp(work);
8335         return 0;
8336 }
8337
8338 /**
8339  * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
8340  * @work:       smb work containing oplock break command buffer
8341  *
8342  * Return:      0
8343  */
8344 static void smb20_oplock_break_ack(struct ksmbd_work *work)
8345 {
8346         struct smb2_oplock_break *req;
8347         struct smb2_oplock_break *rsp;
8348         struct ksmbd_file *fp;
8349         struct oplock_info *opinfo = NULL;
8350         __le32 err = 0;
8351         int ret = 0;
8352         u64 volatile_id, persistent_id;
8353         char req_oplevel = 0, rsp_oplevel = 0;
8354         unsigned int oplock_change_type;
8355
8356         WORK_BUFFERS(work, req, rsp);
8357
8358         volatile_id = req->VolatileFid;
8359         persistent_id = req->PersistentFid;
8360         req_oplevel = req->OplockLevel;
8361         ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
8362                     volatile_id, persistent_id, req_oplevel);
8363
8364         fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
8365         if (!fp) {
8366                 rsp->hdr.Status = STATUS_FILE_CLOSED;
8367                 smb2_set_err_rsp(work);
8368                 return;
8369         }
8370
8371         opinfo = opinfo_get(fp);
8372         if (!opinfo) {
8373                 pr_err("unexpected null oplock_info\n");
8374                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8375                 smb2_set_err_rsp(work);
8376                 ksmbd_fd_put(work, fp);
8377                 return;
8378         }
8379
8380         if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
8381                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8382                 goto err_out;
8383         }
8384
8385         if (opinfo->op_state == OPLOCK_STATE_NONE) {
8386                 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
8387                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8388                 goto err_out;
8389         }
8390
8391         if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8392              opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8393             (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
8394              req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
8395                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8396                 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8397         } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8398                    req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
8399                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8400                 oplock_change_type = OPLOCK_READ_TO_NONE;
8401         } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
8402                    req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8403                 err = STATUS_INVALID_DEVICE_STATE;
8404                 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8405                      opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8406                     req_oplevel == SMB2_OPLOCK_LEVEL_II) {
8407                         oplock_change_type = OPLOCK_WRITE_TO_READ;
8408                 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8409                             opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8410                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8411                         oplock_change_type = OPLOCK_WRITE_TO_NONE;
8412                 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8413                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8414                         oplock_change_type = OPLOCK_READ_TO_NONE;
8415                 } else {
8416                         oplock_change_type = 0;
8417                 }
8418         } else {
8419                 oplock_change_type = 0;
8420         }
8421
8422         switch (oplock_change_type) {
8423         case OPLOCK_WRITE_TO_READ:
8424                 ret = opinfo_write_to_read(opinfo);
8425                 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8426                 break;
8427         case OPLOCK_WRITE_TO_NONE:
8428                 ret = opinfo_write_to_none(opinfo);
8429                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8430                 break;
8431         case OPLOCK_READ_TO_NONE:
8432                 ret = opinfo_read_to_none(opinfo);
8433                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8434                 break;
8435         default:
8436                 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8437                        opinfo->level, rsp_oplevel);
8438         }
8439
8440         if (ret < 0) {
8441                 rsp->hdr.Status = err;
8442                 goto err_out;
8443         }
8444
8445         opinfo->op_state = OPLOCK_STATE_NONE;
8446         wake_up_interruptible_all(&opinfo->oplock_q);
8447         opinfo_put(opinfo);
8448         ksmbd_fd_put(work, fp);
8449
8450         rsp->StructureSize = cpu_to_le16(24);
8451         rsp->OplockLevel = rsp_oplevel;
8452         rsp->Reserved = 0;
8453         rsp->Reserved2 = 0;
8454         rsp->VolatileFid = volatile_id;
8455         rsp->PersistentFid = persistent_id;
8456         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
8457         if (!ret)
8458                 return;
8459
8460 err_out:
8461         opinfo->op_state = OPLOCK_STATE_NONE;
8462         wake_up_interruptible_all(&opinfo->oplock_q);
8463
8464         opinfo_put(opinfo);
8465         ksmbd_fd_put(work, fp);
8466         smb2_set_err_rsp(work);
8467 }
8468
8469 static int check_lease_state(struct lease *lease, __le32 req_state)
8470 {
8471         if ((lease->new_state ==
8472              (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8473             !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8474                 lease->new_state = req_state;
8475                 return 0;
8476         }
8477
8478         if (lease->new_state == req_state)
8479                 return 0;
8480
8481         return 1;
8482 }
8483
8484 /**
8485  * smb21_lease_break_ack() - handler for smb2.1 lease break command
8486  * @work:       smb work containing lease break command buffer
8487  *
8488  * Return:      0
8489  */
8490 static void smb21_lease_break_ack(struct ksmbd_work *work)
8491 {
8492         struct ksmbd_conn *conn = work->conn;
8493         struct smb2_lease_ack *req;
8494         struct smb2_lease_ack *rsp;
8495         struct oplock_info *opinfo;
8496         __le32 err = 0;
8497         int ret = 0;
8498         unsigned int lease_change_type;
8499         __le32 lease_state;
8500         struct lease *lease;
8501
8502         WORK_BUFFERS(work, req, rsp);
8503
8504         ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8505                     le32_to_cpu(req->LeaseState));
8506         opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8507         if (!opinfo) {
8508                 ksmbd_debug(OPLOCK, "file not opened\n");
8509                 smb2_set_err_rsp(work);
8510                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8511                 return;
8512         }
8513         lease = opinfo->o_lease;
8514
8515         if (opinfo->op_state == OPLOCK_STATE_NONE) {
8516                 pr_err("unexpected lease break state 0x%x\n",
8517                        opinfo->op_state);
8518                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8519                 goto err_out;
8520         }
8521
8522         if (check_lease_state(lease, req->LeaseState)) {
8523                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8524                 ksmbd_debug(OPLOCK,
8525                             "req lease state: 0x%x, expected state: 0x%x\n",
8526                             req->LeaseState, lease->new_state);
8527                 goto err_out;
8528         }
8529
8530         if (!atomic_read(&opinfo->breaking_cnt)) {
8531                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8532                 goto err_out;
8533         }
8534
8535         /* check for bad lease state */
8536         if (req->LeaseState &
8537             (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8538                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8539                 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8540                         lease_change_type = OPLOCK_WRITE_TO_NONE;
8541                 else
8542                         lease_change_type = OPLOCK_READ_TO_NONE;
8543                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8544                             le32_to_cpu(lease->state),
8545                             le32_to_cpu(req->LeaseState));
8546         } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8547                    req->LeaseState != SMB2_LEASE_NONE_LE) {
8548                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8549                 lease_change_type = OPLOCK_READ_TO_NONE;
8550                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8551                             le32_to_cpu(lease->state),
8552                             le32_to_cpu(req->LeaseState));
8553         } else {
8554                 /* valid lease state changes */
8555                 err = STATUS_INVALID_DEVICE_STATE;
8556                 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8557                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8558                                 lease_change_type = OPLOCK_WRITE_TO_NONE;
8559                         else
8560                                 lease_change_type = OPLOCK_READ_TO_NONE;
8561                 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8562                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8563                                 lease_change_type = OPLOCK_WRITE_TO_READ;
8564                         else
8565                                 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8566                 } else {
8567                         lease_change_type = 0;
8568                 }
8569         }
8570
8571         switch (lease_change_type) {
8572         case OPLOCK_WRITE_TO_READ:
8573                 ret = opinfo_write_to_read(opinfo);
8574                 break;
8575         case OPLOCK_READ_HANDLE_TO_READ:
8576                 ret = opinfo_read_handle_to_read(opinfo);
8577                 break;
8578         case OPLOCK_WRITE_TO_NONE:
8579                 ret = opinfo_write_to_none(opinfo);
8580                 break;
8581         case OPLOCK_READ_TO_NONE:
8582                 ret = opinfo_read_to_none(opinfo);
8583                 break;
8584         default:
8585                 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8586                             le32_to_cpu(lease->state),
8587                             le32_to_cpu(req->LeaseState));
8588         }
8589
8590         if (ret < 0) {
8591                 rsp->hdr.Status = err;
8592                 goto err_out;
8593         }
8594
8595         lease_state = lease->state;
8596         opinfo->op_state = OPLOCK_STATE_NONE;
8597         wake_up_interruptible_all(&opinfo->oplock_q);
8598         atomic_dec(&opinfo->breaking_cnt);
8599         wake_up_interruptible_all(&opinfo->oplock_brk);
8600         opinfo_put(opinfo);
8601
8602         rsp->StructureSize = cpu_to_le16(36);
8603         rsp->Reserved = 0;
8604         rsp->Flags = 0;
8605         memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8606         rsp->LeaseState = lease_state;
8607         rsp->LeaseDuration = 0;
8608         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
8609         if (!ret)
8610                 return;
8611
8612 err_out:
8613         wake_up_interruptible_all(&opinfo->oplock_q);
8614         atomic_dec(&opinfo->breaking_cnt);
8615         wake_up_interruptible_all(&opinfo->oplock_brk);
8616
8617         opinfo_put(opinfo);
8618         smb2_set_err_rsp(work);
8619 }
8620
8621 /**
8622  * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8623  * @work:       smb work containing oplock/lease break command buffer
8624  *
8625  * Return:      0
8626  */
8627 int smb2_oplock_break(struct ksmbd_work *work)
8628 {
8629         struct smb2_oplock_break *req;
8630         struct smb2_oplock_break *rsp;
8631
8632         ksmbd_debug(SMB, "Received smb2 oplock break acknowledgment request\n");
8633
8634         WORK_BUFFERS(work, req, rsp);
8635
8636         switch (le16_to_cpu(req->StructureSize)) {
8637         case OP_BREAK_STRUCT_SIZE_20:
8638                 smb20_oplock_break_ack(work);
8639                 break;
8640         case OP_BREAK_STRUCT_SIZE_21:
8641                 smb21_lease_break_ack(work);
8642                 break;
8643         default:
8644                 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8645                             le16_to_cpu(req->StructureSize));
8646                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8647                 smb2_set_err_rsp(work);
8648         }
8649
8650         return 0;
8651 }
8652
8653 /**
8654  * smb2_notify() - handler for smb2 notify request
8655  * @work:   smb work containing notify command buffer
8656  *
8657  * Return:      0
8658  */
8659 int smb2_notify(struct ksmbd_work *work)
8660 {
8661         struct smb2_change_notify_req *req;
8662         struct smb2_change_notify_rsp *rsp;
8663
8664         ksmbd_debug(SMB, "Received smb2 notify\n");
8665
8666         WORK_BUFFERS(work, req, rsp);
8667
8668         if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8669                 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8670                 smb2_set_err_rsp(work);
8671                 return 0;
8672         }
8673
8674         smb2_set_err_rsp(work);
8675         rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8676         return 0;
8677 }
8678
8679 /**
8680  * smb2_is_sign_req() - handler for checking packet signing status
8681  * @work:       smb work containing notify command buffer
8682  * @command:    SMB2 command id
8683  *
8684  * Return:      true if packed is signed, false otherwise
8685  */
8686 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8687 {
8688         struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8689
8690         if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8691             command != SMB2_NEGOTIATE_HE &&
8692             command != SMB2_SESSION_SETUP_HE &&
8693             command != SMB2_OPLOCK_BREAK_HE)
8694                 return true;
8695
8696         return false;
8697 }
8698
8699 /**
8700  * smb2_check_sign_req() - handler for req packet sign processing
8701  * @work:   smb work containing notify command buffer
8702  *
8703  * Return:      1 on success, 0 otherwise
8704  */
8705 int smb2_check_sign_req(struct ksmbd_work *work)
8706 {
8707         struct smb2_hdr *hdr;
8708         char signature_req[SMB2_SIGNATURE_SIZE];
8709         char signature[SMB2_HMACSHA256_SIZE];
8710         struct kvec iov[1];
8711         size_t len;
8712
8713         hdr = smb2_get_msg(work->request_buf);
8714         if (work->next_smb2_rcv_hdr_off)
8715                 hdr = ksmbd_req_buf_next(work);
8716
8717         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8718                 len = get_rfc1002_len(work->request_buf);
8719         else if (hdr->NextCommand)
8720                 len = le32_to_cpu(hdr->NextCommand);
8721         else
8722                 len = get_rfc1002_len(work->request_buf) -
8723                         work->next_smb2_rcv_hdr_off;
8724
8725         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8726         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8727
8728         iov[0].iov_base = (char *)&hdr->ProtocolId;
8729         iov[0].iov_len = len;
8730
8731         if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8732                                 signature))
8733                 return 0;
8734
8735         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8736                 pr_err("bad smb2 signature\n");
8737                 return 0;
8738         }
8739
8740         return 1;
8741 }
8742
8743 /**
8744  * smb2_set_sign_rsp() - handler for rsp packet sign processing
8745  * @work:   smb work containing notify command buffer
8746  *
8747  */
8748 void smb2_set_sign_rsp(struct ksmbd_work *work)
8749 {
8750         struct smb2_hdr *hdr;
8751         char signature[SMB2_HMACSHA256_SIZE];
8752         struct kvec *iov;
8753         int n_vec = 1;
8754
8755         hdr = ksmbd_resp_buf_curr(work);
8756         hdr->Flags |= SMB2_FLAGS_SIGNED;
8757         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8758
8759         if (hdr->Command == SMB2_READ) {
8760                 iov = &work->iov[work->iov_idx - 1];
8761                 n_vec++;
8762         } else {
8763                 iov = &work->iov[work->iov_idx];
8764         }
8765
8766         if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8767                                  signature))
8768                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8769 }
8770
8771 /**
8772  * smb3_check_sign_req() - handler for req packet sign processing
8773  * @work:   smb work containing notify command buffer
8774  *
8775  * Return:      1 on success, 0 otherwise
8776  */
8777 int smb3_check_sign_req(struct ksmbd_work *work)
8778 {
8779         struct ksmbd_conn *conn = work->conn;
8780         char *signing_key;
8781         struct smb2_hdr *hdr;
8782         struct channel *chann;
8783         char signature_req[SMB2_SIGNATURE_SIZE];
8784         char signature[SMB2_CMACAES_SIZE];
8785         struct kvec iov[1];
8786         size_t len;
8787
8788         hdr = smb2_get_msg(work->request_buf);
8789         if (work->next_smb2_rcv_hdr_off)
8790                 hdr = ksmbd_req_buf_next(work);
8791
8792         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8793                 len = get_rfc1002_len(work->request_buf);
8794         else if (hdr->NextCommand)
8795                 len = le32_to_cpu(hdr->NextCommand);
8796         else
8797                 len = get_rfc1002_len(work->request_buf) -
8798                         work->next_smb2_rcv_hdr_off;
8799
8800         if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8801                 signing_key = work->sess->smb3signingkey;
8802         } else {
8803                 chann = lookup_chann_list(work->sess, conn);
8804                 if (!chann) {
8805                         return 0;
8806                 }
8807                 signing_key = chann->smb3signingkey;
8808         }
8809
8810         if (!signing_key) {
8811                 pr_err("SMB3 signing key is not generated\n");
8812                 return 0;
8813         }
8814
8815         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8816         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8817         iov[0].iov_base = (char *)&hdr->ProtocolId;
8818         iov[0].iov_len = len;
8819
8820         if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8821                 return 0;
8822
8823         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8824                 pr_err("bad smb2 signature\n");
8825                 return 0;
8826         }
8827
8828         return 1;
8829 }
8830
8831 /**
8832  * smb3_set_sign_rsp() - handler for rsp packet sign processing
8833  * @work:   smb work containing notify command buffer
8834  *
8835  */
8836 void smb3_set_sign_rsp(struct ksmbd_work *work)
8837 {
8838         struct ksmbd_conn *conn = work->conn;
8839         struct smb2_hdr *hdr;
8840         struct channel *chann;
8841         char signature[SMB2_CMACAES_SIZE];
8842         struct kvec *iov;
8843         int n_vec = 1;
8844         char *signing_key;
8845
8846         hdr = ksmbd_resp_buf_curr(work);
8847
8848         if (conn->binding == false &&
8849             le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8850                 signing_key = work->sess->smb3signingkey;
8851         } else {
8852                 chann = lookup_chann_list(work->sess, work->conn);
8853                 if (!chann) {
8854                         return;
8855                 }
8856                 signing_key = chann->smb3signingkey;
8857         }
8858
8859         if (!signing_key)
8860                 return;
8861
8862         hdr->Flags |= SMB2_FLAGS_SIGNED;
8863         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8864
8865         if (hdr->Command == SMB2_READ) {
8866                 iov = &work->iov[work->iov_idx - 1];
8867                 n_vec++;
8868         } else {
8869                 iov = &work->iov[work->iov_idx];
8870         }
8871
8872         if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
8873                                  signature))
8874                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8875 }
8876
8877 /**
8878  * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8879  * @work:   smb work containing response buffer
8880  *
8881  */
8882 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8883 {
8884         struct ksmbd_conn *conn = work->conn;
8885         struct ksmbd_session *sess = work->sess;
8886         struct smb2_hdr *req, *rsp;
8887
8888         if (conn->dialect != SMB311_PROT_ID)
8889                 return;
8890
8891         WORK_BUFFERS(work, req, rsp);
8892
8893         if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8894             conn->preauth_info)
8895                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8896                                                  conn->preauth_info->Preauth_HashValue);
8897
8898         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8899                 __u8 *hash_value;
8900
8901                 if (conn->binding) {
8902                         struct preauth_session *preauth_sess;
8903
8904                         preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8905                         if (!preauth_sess)
8906                                 return;
8907                         hash_value = preauth_sess->Preauth_HashValue;
8908                 } else {
8909                         hash_value = sess->Preauth_HashValue;
8910                         if (!hash_value)
8911                                 return;
8912                 }
8913                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8914                                                  hash_value);
8915         }
8916 }
8917
8918 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8919 {
8920         struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8921         struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8922         unsigned int orig_len = get_rfc1002_len(old_buf);
8923
8924         /* tr_buf must be cleared by the caller */
8925         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8926         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8927         tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8928         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8929             cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8930                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8931         else
8932                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8933         memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8934         inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8935         inc_rfc1001_len(tr_buf, orig_len);
8936 }
8937
8938 int smb3_encrypt_resp(struct ksmbd_work *work)
8939 {
8940         struct kvec *iov = work->iov;
8941         int rc = -ENOMEM;
8942         void *tr_buf;
8943
8944         tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, KSMBD_DEFAULT_GFP);
8945         if (!tr_buf)
8946                 return rc;
8947
8948         /* fill transform header */
8949         fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
8950
8951         iov[0].iov_base = tr_buf;
8952         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8953         work->tr_buf = tr_buf;
8954
8955         return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
8956 }
8957
8958 bool smb3_is_transform_hdr(void *buf)
8959 {
8960         struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8961
8962         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8963 }
8964
8965 int smb3_decrypt_req(struct ksmbd_work *work)
8966 {
8967         struct ksmbd_session *sess;
8968         char *buf = work->request_buf;
8969         unsigned int pdu_length = get_rfc1002_len(buf);
8970         struct kvec iov[2];
8971         int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8972         struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8973         int rc = 0;
8974
8975         if (pdu_length < sizeof(struct smb2_transform_hdr) ||
8976             buf_data_size < sizeof(struct smb2_hdr)) {
8977                 pr_err("Transform message is too small (%u)\n",
8978                        pdu_length);
8979                 return -ECONNABORTED;
8980         }
8981
8982         if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8983                 pr_err("Transform message is broken\n");
8984                 return -ECONNABORTED;
8985         }
8986
8987         sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8988         if (!sess) {
8989                 pr_err("invalid session id(%llx) in transform header\n",
8990                        le64_to_cpu(tr_hdr->SessionId));
8991                 return -ECONNABORTED;
8992         }
8993         ksmbd_user_session_put(sess);
8994
8995         iov[0].iov_base = buf;
8996         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8997         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8998         iov[1].iov_len = buf_data_size;
8999         rc = ksmbd_crypt_message(work, iov, 2, 0);
9000         if (rc)
9001                 return rc;
9002
9003         memmove(buf + 4, iov[1].iov_base, buf_data_size);
9004         *(__be32 *)buf = cpu_to_be32(buf_data_size);
9005
9006         return rc;
9007 }
9008
9009 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
9010 {
9011         struct ksmbd_conn *conn = work->conn;
9012         struct ksmbd_session *sess = work->sess;
9013         struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
9014
9015         if (conn->dialect < SMB30_PROT_ID)
9016                 return false;
9017
9018         if (work->next_smb2_rcv_hdr_off)
9019                 rsp = ksmbd_resp_buf_next(work);
9020
9021         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
9022             sess->user && !user_guest(sess->user) &&
9023             rsp->Status == STATUS_SUCCESS)
9024                 return true;
9025         return false;
9026 }