fs/smb/client/smb2ops.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  SMB2 version specific operations
   4  *
   5  *  Copyright (c) 2012, Jeff Layton <[email protected]>
   6  */
   7
   8 #include <linux/pagemap.h>
   9 #include <linux/vfs.h>
  10 #include <linux/falloc.h>
  11 #include <linux/scatterlist.h>
  12 #include <linux/uuid.h>
  13 #include <linux/sort.h>
  14 #include <crypto/aead.h>
  15 #include <linux/fiemap.h>
  16 #include <uapi/linux/magic.h>
  17 #include "cifsfs.h"
  18 #include "cifsglob.h"
  19 #include "smb2pdu.h"
  20 #include "smb2proto.h"
  21 #include "cifsproto.h"
  22 #include "cifs_debug.h"
  23 #include "cifs_unicode.h"
  24 #include "smb2status.h"
  25 #include "smb2glob.h"
  26 #include "cifs_ioctl.h"
  27 #include "smbdirect.h"
  28 #include "fscache.h"
  29 #include "fs_context.h"
  30 #include "cached_dir.h"
  31 #include "reparse.h"
  32
  33 /* Change credits for different ops and return the total number of credits */
  34 static int
  35 change_conf(struct TCP_Server_Info *server)
  36 {
  37         server->credits += server->echo_credits + server->oplock_credits;
  38         if (server->credits > server->max_credits)
  39                 server->credits = server->max_credits;
  40         server->oplock_credits = server->echo_credits = 0;
  41         switch (server->credits) {
  42         case 0:
  43                 return 0;
  44         case 1:
  45                 server->echoes = false;
  46                 server->oplocks = false;
  47                 break;
  48         case 2:
  49                 server->echoes = true;
  50                 server->oplocks = false;
  51                 server->echo_credits = 1;
  52                 break;
  53         default:
  54                 server->echoes = true;
  55                 if (enable_oplocks) {
  56                         server->oplocks = true;
  57                         server->oplock_credits = 1;
  58                 } else
  59                         server->oplocks = false;
  60
  61                 server->echo_credits = 1;
  62         }
  63         server->credits -= server->echo_credits + server->oplock_credits;
  64         return server->credits + server->echo_credits + server->oplock_credits;
  65 }
  66
  67 static void
  68 smb2_add_credits(struct TCP_Server_Info *server,
  69                  struct cifs_credits *credits, const int optype)
  70 {
  71         int *val, rc = -1;
  72         int scredits, in_flight;
  73         unsigned int add = credits->value;
  74         unsigned int instance = credits->instance;
  75         bool reconnect_detected = false;
  76         bool reconnect_with_invalid_credits = false;
  77
  78         spin_lock(&server->req_lock);
  79         val = server->ops->get_credits_field(server, optype);
  80
  81         /* eg found case where write overlapping reconnect messed up credits */
  82         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  83                 reconnect_with_invalid_credits = true;
  84
  85         if ((instance == 0) || (instance == server->reconnect_instance))
  86                 *val += add;
  87         else
  88                 reconnect_detected = true;
  89
  90         if (*val > 65000) {
  91                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  92                 pr_warn_once("server overflowed SMB3 credits\n");
  93                 trace_smb3_overflow_credits(server->CurrentMid,
  94                                             server->conn_id, server->hostname, *val,
  95                                             add, server->in_flight);
  96         }
  97         if (credits->in_flight_check > 1) {
  98                 pr_warn_once("rreq R=%08x[%x] Credits not in flight\n",
  99                              credits->rreq_debug_id, credits->rreq_debug_index);
 100         } else {
 101                 credits->in_flight_check = 2;
 102         }
 103         if (WARN_ON_ONCE(server->in_flight == 0)) {
 104                 pr_warn_once("rreq R=%08x[%x] Zero in_flight\n",
 105                              credits->rreq_debug_id, credits->rreq_debug_index);
 106                 trace_smb3_rw_credits(credits->rreq_debug_id,
 107                                       credits->rreq_debug_index,
 108                                       credits->value,
 109                                       server->credits, server->in_flight, 0,
 110                                       cifs_trace_rw_credits_zero_in_flight);
 111         }
 112         server->in_flight--;
 113         if (server->in_flight == 0 &&
 114            ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
 115            ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
 116                 rc = change_conf(server);
 117         /*
 118          * Sometimes server returns 0 credits on oplock break ack - we need to
 119          * rebalance credits in this case.
 120          */
 121         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
 122                  server->oplocks) {
 123                 if (server->credits > 1) {
 124                         server->credits--;
 125                         server->oplock_credits++;
 126                 }
 127         } else if ((server->in_flight > 0) && (server->oplock_credits > 3) &&
 128                    ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP))
 129                 /* if now have too many oplock credits, rebalance so don't starve normal ops */
 130                 change_conf(server);
 131
 132         scredits = *val;
 133         in_flight = server->in_flight;
 134         spin_unlock(&server->req_lock);
 135         wake_up(&server->request_q);
 136
 137         if (reconnect_detected) {
 138                 trace_smb3_reconnect_detected(server->CurrentMid,
 139                         server->conn_id, server->hostname, scredits, add, in_flight);
 140
 141                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 142                          add, instance);
 143         }
 144
 145         if (reconnect_with_invalid_credits) {
 146                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
 147                         server->conn_id, server->hostname, scredits, add, in_flight);
 148                 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
 149                          optype, scredits, add);
 150         }
 151
 152         spin_lock(&server->srv_lock);
 153         if (server->tcpStatus == CifsNeedReconnect
 154             || server->tcpStatus == CifsExiting) {
 155                 spin_unlock(&server->srv_lock);
 156                 return;
 157         }
 158         spin_unlock(&server->srv_lock);
 159
 160         switch (rc) {
 161         case -1:
 162                 /* change_conf hasn't been executed */
 163                 break;
 164         case 0:
 165                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 166                 break;
 167         case 1:
 168                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 169                 break;
 170         case 2:
 171                 cifs_dbg(FYI, "disabling oplocks\n");
 172                 break;
 173         default:
 174                 /* change_conf rebalanced credits for different types */
 175                 break;
 176         }
 177
 178         trace_smb3_add_credits(server->CurrentMid,
 179                         server->conn_id, server->hostname, scredits, add, in_flight);
 180         cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
 181 }
 182
 183 static void
 184 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 185 {
 186         int scredits, in_flight;
 187
 188         spin_lock(&server->req_lock);
 189         server->credits = val;
 190         if (val == 1) {
 191                 server->reconnect_instance++;
 192                 /*
 193                  * ChannelSequence updated for all channels in primary channel so that consistent
 194                  * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1
 195                  */
 196                 if (SERVER_IS_CHAN(server))
 197                         server->primary_server->channel_sequence_num++;
 198                 else
 199                         server->channel_sequence_num++;
 200         }
 201         scredits = server->credits;
 202         in_flight = server->in_flight;
 203         spin_unlock(&server->req_lock);
 204
 205         trace_smb3_set_credits(server->CurrentMid,
 206                         server->conn_id, server->hostname, scredits, val, in_flight);
 207         cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
 208
 209         /* don't log while holding the lock */
 210         if (val == 1)
 211                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 212 }
 213
 214 static int *
 215 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 216 {
 217         switch (optype) {
 218         case CIFS_ECHO_OP:
 219                 return &server->echo_credits;
 220         case CIFS_OBREAK_OP:
 221                 return &server->oplock_credits;
 222         default:
 223                 return &server->credits;
 224         }
 225 }
 226
 227 static unsigned int
 228 smb2_get_credits(struct mid_q_entry *mid)
 229 {
 230         return mid->credits_received;
 231 }
 232
 233 static int
 234 smb2_wait_mtu_credits(struct TCP_Server_Info *server, size_t size,
 235                       size_t *num, struct cifs_credits *credits)
 236 {
 237         int rc = 0;
 238         unsigned int scredits, in_flight;
 239
 240         spin_lock(&server->req_lock);
 241         while (1) {
 242                 spin_unlock(&server->req_lock);
 243
 244                 spin_lock(&server->srv_lock);
 245                 if (server->tcpStatus == CifsExiting) {
 246                         spin_unlock(&server->srv_lock);
 247                         return -ENOENT;
 248                 }
 249                 spin_unlock(&server->srv_lock);
 250
 251                 spin_lock(&server->req_lock);
 252                 if (server->credits <= 0) {
 253                         spin_unlock(&server->req_lock);
 254                         cifs_num_waiters_inc(server);
 255                         rc = wait_event_killable(server->request_q,
 256                                 has_credits(server, &server->credits, 1));
 257                         cifs_num_waiters_dec(server);
 258                         if (rc)
 259                                 return rc;
 260                         spin_lock(&server->req_lock);
 261                 } else {
 262                         scredits = server->credits;
 263                         /* can deadlock with reopen */
 264                         if (scredits <= 8) {
 265                                 *num = SMB2_MAX_BUFFER_SIZE;
 266                                 credits->value = 0;
 267                                 credits->instance = 0;
 268                                 break;
 269                         }
 270
 271                         /* leave some credits for reopen and other ops */
 272                         scredits -= 8;
 273                         *num = min_t(unsigned int, size,
 274                                      scredits * SMB2_MAX_BUFFER_SIZE);
 275
 276                         credits->value =
 277                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 278                         credits->instance = server->reconnect_instance;
 279                         server->credits -= credits->value;
 280                         server->in_flight++;
 281                         if (server->in_flight > server->max_in_flight)
 282                                 server->max_in_flight = server->in_flight;
 283                         break;
 284                 }
 285         }
 286         scredits = server->credits;
 287         in_flight = server->in_flight;
 288         spin_unlock(&server->req_lock);
 289
 290         trace_smb3_wait_credits(server->CurrentMid,
 291                         server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
 292         cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
 293                         __func__, credits->value, scredits);
 294
 295         return rc;
 296 }
 297
 298 static int
 299 smb2_adjust_credits(struct TCP_Server_Info *server,
 300                     struct cifs_io_subrequest *subreq,
 301                     unsigned int /*enum smb3_rw_credits_trace*/ trace)
 302 {
 303         struct cifs_credits *credits = &subreq->credits;
 304         int new_val = DIV_ROUND_UP(subreq->subreq.len, SMB2_MAX_BUFFER_SIZE);
 305         int scredits, in_flight;
 306
 307         if (!credits->value || credits->value == new_val)
 308                 return 0;
 309
 310         if (credits->value < new_val) {
 311                 trace_smb3_rw_credits(subreq->rreq->debug_id,
 312                                       subreq->subreq.debug_index,
 313                                       credits->value,
 314                                       server->credits, server->in_flight,
 315                                       new_val - credits->value,
 316                                       cifs_trace_rw_credits_no_adjust_up);
 317                 trace_smb3_too_many_credits(server->CurrentMid,
 318                                 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
 319                 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
 320                                 credits->value, new_val);
 321
 322                 return -EOPNOTSUPP;
 323         }
 324
 325         spin_lock(&server->req_lock);
 326
 327         if (server->reconnect_instance != credits->instance) {
 328                 scredits = server->credits;
 329                 in_flight = server->in_flight;
 330                 spin_unlock(&server->req_lock);
 331
 332                 trace_smb3_rw_credits(subreq->rreq->debug_id,
 333                                       subreq->subreq.debug_index,
 334                                       credits->value,
 335                                       server->credits, server->in_flight,
 336                                       new_val - credits->value,
 337                                       cifs_trace_rw_credits_old_session);
 338                 trace_smb3_reconnect_detected(server->CurrentMid,
 339                         server->conn_id, server->hostname, scredits,
 340                         credits->value - new_val, in_flight);
 341                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 342                          credits->value - new_val);
 343                 return -EAGAIN;
 344         }
 345
 346         trace_smb3_rw_credits(subreq->rreq->debug_id,
 347                               subreq->subreq.debug_index,
 348                               credits->value,
 349                               server->credits, server->in_flight,
 350                               new_val - credits->value, trace);
 351         server->credits += credits->value - new_val;
 352         scredits = server->credits;
 353         in_flight = server->in_flight;
 354         spin_unlock(&server->req_lock);
 355         wake_up(&server->request_q);
 356
 357         trace_smb3_adj_credits(server->CurrentMid,
 358                         server->conn_id, server->hostname, scredits,
 359                         credits->value - new_val, in_flight);
 360         cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
 361                         __func__, credits->value - new_val, scredits);
 362
 363         credits->value = new_val;
 364
 365         return 0;
 366 }
 367
 368 static __u64
 369 smb2_get_next_mid(struct TCP_Server_Info *server)
 370 {
 371         __u64 mid;
 372         /* for SMB2 we need the current value */
 373         spin_lock(&server->mid_lock);
 374         mid = server->CurrentMid++;
 375         spin_unlock(&server->mid_lock);
 376         return mid;
 377 }
 378
 379 static void
 380 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 381 {
 382         spin_lock(&server->mid_lock);
 383         if (server->CurrentMid >= val)
 384                 server->CurrentMid -= val;
 385         spin_unlock(&server->mid_lock);
 386 }
 387
 388 static struct mid_q_entry *
 389 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
 390 {
 391         struct mid_q_entry *mid;
 392         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 393         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 394
 395         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 396                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 397                 return NULL;
 398         }
 399
 400         spin_lock(&server->mid_lock);
 401         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 402                 if ((mid->mid == wire_mid) &&
 403                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 404                     (mid->command == shdr->Command)) {
 405                         kref_get(&mid->refcount);
 406                         if (dequeue) {
 407                                 list_del_init(&mid->qhead);
 408                                 mid->mid_flags |= MID_DELETED;
 409                         }
 410                         spin_unlock(&server->mid_lock);
 411                         return mid;
 412                 }
 413         }
 414         spin_unlock(&server->mid_lock);
 415         return NULL;
 416 }
 417
 418 static struct mid_q_entry *
 419 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 420 {
 421         return __smb2_find_mid(server, buf, false);
 422 }
 423
 424 static struct mid_q_entry *
 425 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
 426 {
 427         return __smb2_find_mid(server, buf, true);
 428 }
 429
 430 static void
 431 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 432 {
 433 #ifdef CONFIG_CIFS_DEBUG2
 434         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 435
 436         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 437                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 438                  shdr->Id.SyncId.ProcessId);
 439         if (!server->ops->check_message(buf, server->total_read, server)) {
 440                 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 441                                 server->ops->calc_smb_size(buf));
 442         }
 443 #endif
 444 }
 445
 446 static bool
 447 smb2_need_neg(struct TCP_Server_Info *server)
 448 {
 449         return server->max_read == 0;
 450 }
 451
 452 static int
 453 smb2_negotiate(const unsigned int xid,
 454                struct cifs_ses *ses,
 455                struct TCP_Server_Info *server)
 456 {
 457         int rc;
 458
 459         spin_lock(&server->mid_lock);
 460         server->CurrentMid = 0;
 461         spin_unlock(&server->mid_lock);
 462         rc = SMB2_negotiate(xid, ses, server);
 463         /* BB we probably don't need to retry with modern servers */
 464         if (rc == -EAGAIN)
 465                 rc = -EHOSTDOWN;
 466         return rc;
 467 }
 468
 469 static unsigned int
 470 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 471 {
 472         struct TCP_Server_Info *server = tcon->ses->server;
 473         unsigned int wsize;
 474
 475         /* start with specified wsize, or default */
 476         wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
 477         wsize = min_t(unsigned int, wsize, server->max_write);
 478         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 479                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 480
 481         return wsize;
 482 }
 483
 484 static unsigned int
 485 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 486 {
 487         struct TCP_Server_Info *server = tcon->ses->server;
 488         unsigned int wsize;
 489
 490         /* start with specified wsize, or default */
 491         wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
 492         wsize = min_t(unsigned int, wsize, server->max_write);
 493 #ifdef CONFIG_CIFS_SMB_DIRECT
 494         if (server->rdma) {
 495                 if (server->sign)
 496                         /*
 497                          * Account for SMB2 data transfer packet header and
 498                          * possible encryption header
 499                          */
 500                         wsize = min_t(unsigned int,
 501                                 wsize,
 502                                 server->smbd_conn->max_fragmented_send_size -
 503                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 504                                         sizeof(struct smb2_transform_hdr));
 505                 else
 506                         wsize = min_t(unsigned int,
 507                                 wsize, server->smbd_conn->max_readwrite_size);
 508         }
 509 #endif
 510         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 511                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 512
 513         return wsize;
 514 }
 515
 516 static unsigned int
 517 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 518 {
 519         struct TCP_Server_Info *server = tcon->ses->server;
 520         unsigned int rsize;
 521
 522         /* start with specified rsize, or default */
 523         rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
 524         rsize = min_t(unsigned int, rsize, server->max_read);
 525
 526         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 527                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 528
 529         return rsize;
 530 }
 531
 532 static unsigned int
 533 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 534 {
 535         struct TCP_Server_Info *server = tcon->ses->server;
 536         unsigned int rsize;
 537
 538         /* start with specified rsize, or default */
 539         rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
 540         rsize = min_t(unsigned int, rsize, server->max_read);
 541 #ifdef CONFIG_CIFS_SMB_DIRECT
 542         if (server->rdma) {
 543                 if (server->sign)
 544                         /*
 545                          * Account for SMB2 data transfer packet header and
 546                          * possible encryption header
 547                          */
 548                         rsize = min_t(unsigned int,
 549                                 rsize,
 550                                 server->smbd_conn->max_fragmented_recv_size -
 551                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 552                                         sizeof(struct smb2_transform_hdr));
 553                 else
 554                         rsize = min_t(unsigned int,
 555                                 rsize, server->smbd_conn->max_readwrite_size);
 556         }
 557 #endif
 558
 559         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 560                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 561
 562         return rsize;
 563 }
 564
 565 /*
 566  * compare two interfaces a and b
 567  * return 0 if everything matches.
 568  * return 1 if a is rdma capable, or rss capable, or has higher link speed
 569  * return -1 otherwise.
 570  */
 571 static int
 572 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
 573 {
 574         int cmp_ret = 0;
 575
 576         WARN_ON(!a || !b);
 577         if (a->rdma_capable == b->rdma_capable) {
 578                 if (a->rss_capable == b->rss_capable) {
 579                         if (a->speed == b->speed) {
 580                                 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr,
 581                                                           (struct sockaddr *) &b->sockaddr);
 582                                 if (!cmp_ret)
 583                                         return 0;
 584                                 else if (cmp_ret > 0)
 585                                         return 1;
 586                                 else
 587                                         return -1;
 588                         } else if (a->speed > b->speed)
 589                                 return 1;
 590                         else
 591                                 return -1;
 592                 } else if (a->rss_capable > b->rss_capable)
 593                         return 1;
 594                 else
 595                         return -1;
 596         } else if (a->rdma_capable > b->rdma_capable)
 597                 return 1;
 598         else
 599                 return -1;
 600 }
 601
 602 static int
 603 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 604                         size_t buf_len, struct cifs_ses *ses, bool in_mount)
 605 {
 606         struct network_interface_info_ioctl_rsp *p;
 607         struct sockaddr_in *addr4;
 608         struct sockaddr_in6 *addr6;
 609         struct iface_info_ipv4 *p4;
 610         struct iface_info_ipv6 *p6;
 611         struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;
 612         struct cifs_server_iface tmp_iface;
 613         ssize_t bytes_left;
 614         size_t next = 0;
 615         int nb_iface = 0;
 616         int rc = 0, ret = 0;
 617
 618         bytes_left = buf_len;
 619         p = buf;
 620
 621         spin_lock(&ses->iface_lock);
 622         /* do not query too frequently, this time with lock held */
 623         if (ses->iface_last_update &&
 624             time_before(jiffies, ses->iface_last_update +
 625                         (SMB_INTERFACE_POLL_INTERVAL * HZ))) {
 626                 spin_unlock(&ses->iface_lock);
 627                 return 0;
 628         }
 629
 630         /*
 631          * Go through iface_list and mark them as inactive
 632          */
 633         list_for_each_entry_safe(iface, niface, &ses->iface_list,
 634                                  iface_head)
 635                 iface->is_active = 0;
 636
 637         spin_unlock(&ses->iface_lock);
 638
 639         /*
 640          * Samba server e.g. can return an empty interface list in some cases,
 641          * which would only be a problem if we were requesting multichannel
 642          */
 643         if (bytes_left == 0) {
 644                 /* avoid spamming logs every 10 minutes, so log only in mount */
 645                 if ((ses->chan_max > 1) && in_mount)
 646                         cifs_dbg(VFS,
 647                                  "multichannel not available\n"
 648                                  "Empty network interface list returned by server %s\n",
 649                                  ses->server->hostname);
 650                 rc = -EOPNOTSUPP;
 651                 ses->iface_last_update = jiffies;
 652                 goto out;
 653         }
 654
 655         while (bytes_left >= (ssize_t)sizeof(*p)) {
 656                 memset(&tmp_iface, 0, sizeof(tmp_iface));
 657                 tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
 658                 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
 659                 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
 660
 661                 switch (p->Family) {
 662                 /*
 663                  * The kernel and wire socket structures have the same
 664                  * layout and use network byte order but make the
 665                  * conversion explicit in case either one changes.
 666                  */
 667                 case INTERNETWORK:
 668                         addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
 669                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 670                         addr4->sin_family = AF_INET;
 671                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 672
 673                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 674                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 675
 676                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 677                                  &addr4->sin_addr);
 678                         break;
 679                 case INTERNETWORKV6:
 680                         addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr;
 681                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 682                         addr6->sin6_family = AF_INET6;
 683                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 684
 685                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 686                         addr6->sin6_flowinfo = 0;
 687                         addr6->sin6_scope_id = 0;
 688                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 689
 690                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 691                                  &addr6->sin6_addr);
 692                         break;
 693                 default:
 694                         cifs_dbg(VFS,
 695                                  "%s: skipping unsupported socket family\n",
 696                                  __func__);
 697                         goto next_iface;
 698                 }
 699
 700                 /*
 701                  * The iface_list is assumed to be sorted by speed.
 702                  * Check if the new interface exists in that list.
 703                  * NEVER change iface. it could be in use.
 704                  * Add a new one instead
 705                  */
 706                 spin_lock(&ses->iface_lock);
 707                 list_for_each_entry_safe(iface, niface, &ses->iface_list,
 708                                          iface_head) {
 709                         ret = iface_cmp(iface, &tmp_iface);
 710                         if (!ret) {
 711                                 iface->is_active = 1;
 712                                 spin_unlock(&ses->iface_lock);
 713                                 goto next_iface;
 714                         } else if (ret < 0) {
 715                                 /* all remaining ifaces are slower */
 716                                 kref_get(&iface->refcount);
 717                                 break;
 718                         }
 719                 }
 720                 spin_unlock(&ses->iface_lock);
 721
 722                 /* no match. insert the entry in the list */
 723                 info = kmalloc(sizeof(struct cifs_server_iface),
 724                                GFP_KERNEL);
 725                 if (!info) {
 726                         rc = -ENOMEM;
 727                         goto out;
 728                 }
 729                 memcpy(info, &tmp_iface, sizeof(tmp_iface));
 730
 731                 /* add this new entry to the list */
 732                 kref_init(&info->refcount);
 733                 info->is_active = 1;
 734
 735                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
 736                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 737                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 738                          le32_to_cpu(p->Capability));
 739
 740                 spin_lock(&ses->iface_lock);
 741                 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
 742                         list_add_tail(&info->iface_head, &iface->iface_head);
 743                         kref_put(&iface->refcount, release_iface);
 744                 } else
 745                         list_add_tail(&info->iface_head, &ses->iface_list);
 746
 747                 ses->iface_count++;
 748                 spin_unlock(&ses->iface_lock);
 749 next_iface:
 750                 nb_iface++;
 751                 next = le32_to_cpu(p->Next);
 752                 if (!next) {
 753                         bytes_left -= sizeof(*p);
 754                         break;
 755                 }
 756                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 757                 bytes_left -= next;
 758         }
 759
 760         if (!nb_iface) {
 761                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 762                 rc = -EINVAL;
 763                 goto out;
 764         }
 765
 766         /* Azure rounds the buffer size up 8, to a 16 byte boundary */
 767         if ((bytes_left > 8) || p->Next)
 768                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 769
 770         ses->iface_last_update = jiffies;
 771
 772 out:
 773         /*
 774          * Go through the list again and put the inactive entries
 775          */
 776         spin_lock(&ses->iface_lock);
 777         list_for_each_entry_safe(iface, niface, &ses->iface_list,
 778                                  iface_head) {
 779                 if (!iface->is_active) {
 780                         list_del(&iface->iface_head);
 781                         kref_put(&iface->refcount, release_iface);
 782                         ses->iface_count--;
 783                 }
 784         }
 785         spin_unlock(&ses->iface_lock);
 786
 787         return rc;
 788 }
 789
 790 int
 791 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
 792 {
 793         int rc;
 794         unsigned int ret_data_len = 0;
 795         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 796         struct cifs_ses *ses = tcon->ses;
 797         struct TCP_Server_Info *pserver;
 798
 799         /* do not query too frequently */
 800         if (ses->iface_last_update &&
 801             time_before(jiffies, ses->iface_last_update +
 802                         (SMB_INTERFACE_POLL_INTERVAL * HZ)))
 803                 return 0;
 804
 805         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 806                         FSCTL_QUERY_NETWORK_INTERFACE_INFO,
 807                         NULL /* no data input */, 0 /* no data input */,
 808                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 809         if (rc == -EOPNOTSUPP) {
 810                 cifs_dbg(FYI,
 811                          "server does not support query network interfaces\n");
 812                 ret_data_len = 0;
 813         } else if (rc != 0) {
 814                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 815                 goto out;
 816         }
 817
 818         rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
 819         if (rc)
 820                 goto out;
 821
 822         /* check if iface is still active */
 823         spin_lock(&ses->chan_lock);
 824         pserver = ses->chans[0].server;
 825         if (pserver && !cifs_chan_is_iface_active(ses, pserver)) {
 826                 spin_unlock(&ses->chan_lock);
 827                 cifs_chan_update_iface(ses, pserver);
 828                 spin_lock(&ses->chan_lock);
 829         }
 830         spin_unlock(&ses->chan_lock);
 831
 832 out:
 833         kfree(out_buf);
 834         return rc;
 835 }
 836
 837 static void
 838 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 839               struct cifs_sb_info *cifs_sb)
 840 {
 841         int rc;
 842         __le16 srch_path = 0; /* Null - open root of share */
 843         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 844         struct cifs_open_parms oparms;
 845         struct cifs_fid fid;
 846         struct cached_fid *cfid = NULL;
 847
 848         oparms = (struct cifs_open_parms) {
 849                 .tcon = tcon,
 850                 .path = "",
 851                 .desired_access = FILE_READ_ATTRIBUTES,
 852                 .disposition = FILE_OPEN,
 853                 .create_options = cifs_create_options(cifs_sb, 0),
 854                 .fid = &fid,
 855         };
 856
 857         rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
 858         if (rc == 0)
 859                 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
 860         else
 861                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 862                                NULL, NULL);
 863         if (rc)
 864                 return;
 865
 866         SMB3_request_interfaces(xid, tcon, true /* called during  mount */);
 867
 868         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 869                         FS_ATTRIBUTE_INFORMATION);
 870         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 871                         FS_DEVICE_INFORMATION);
 872         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 873                         FS_VOLUME_INFORMATION);
 874         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 875                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 876         if (cfid == NULL)
 877                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 878         else
 879                 close_cached_dir(cfid);
 880 }
 881
 882 static void
 883 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 884               struct cifs_sb_info *cifs_sb)
 885 {
 886         int rc;
 887         __le16 srch_path = 0; /* Null - open root of share */
 888         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 889         struct cifs_open_parms oparms;
 890         struct cifs_fid fid;
 891
 892         oparms = (struct cifs_open_parms) {
 893                 .tcon = tcon,
 894                 .path = "",
 895                 .desired_access = FILE_READ_ATTRIBUTES,
 896                 .disposition = FILE_OPEN,
 897                 .create_options = cifs_create_options(cifs_sb, 0),
 898                 .fid = &fid,
 899         };
 900
 901         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 902                        NULL, NULL);
 903         if (rc)
 904                 return;
 905
 906         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 907                         FS_ATTRIBUTE_INFORMATION);
 908         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 909                         FS_DEVICE_INFORMATION);
 910         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 911 }
 912
 913 static int
 914 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 915                         struct cifs_sb_info *cifs_sb, const char *full_path)
 916 {
 917         __le16 *utf16_path;
 918         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 919         int err_buftype = CIFS_NO_BUFFER;
 920         struct cifs_open_parms oparms;
 921         struct kvec err_iov = {};
 922         struct cifs_fid fid;
 923         struct cached_fid *cfid;
 924         bool islink;
 925         int rc, rc2;
 926
 927         rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
 928         if (!rc) {
 929                 if (cfid->has_lease) {
 930                         close_cached_dir(cfid);
 931                         return 0;
 932                 }
 933                 close_cached_dir(cfid);
 934         }
 935
 936         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 937         if (!utf16_path)
 938                 return -ENOMEM;
 939
 940         oparms = (struct cifs_open_parms) {
 941                 .tcon = tcon,
 942                 .path = full_path,
 943                 .desired_access = FILE_READ_ATTRIBUTES,
 944                 .disposition = FILE_OPEN,
 945                 .create_options = cifs_create_options(cifs_sb, 0),
 946                 .fid = &fid,
 947         };
 948
 949         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
 950                        &err_iov, &err_buftype);
 951         if (rc) {
 952                 struct smb2_hdr *hdr = err_iov.iov_base;
 953
 954                 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
 955                         goto out;
 956
 957                 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
 958                         rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
 959                                                              full_path, &islink);
 960                         if (rc2) {
 961                                 rc = rc2;
 962                                 goto out;
 963                         }
 964                         if (islink)
 965                                 rc = -EREMOTE;
 966                 }
 967                 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
 968                     (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
 969                         rc = -EOPNOTSUPP;
 970                 goto out;
 971         }
 972
 973         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 974
 975 out:
 976         free_rsp_buf(err_buftype, err_iov.iov_base);
 977         kfree(utf16_path);
 978         return rc;
 979 }
 980
 981 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 982                              struct cifs_sb_info *cifs_sb, const char *full_path,
 983                              u64 *uniqueid, struct cifs_open_info_data *data)
 984 {
 985         *uniqueid = le64_to_cpu(data->fi.IndexNumber);
 986         return 0;
 987 }
 988
 989 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 990                                 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
 991 {
 992         struct cifs_fid *fid = &cfile->fid;
 993
 994         if (cfile->symlink_target) {
 995                 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 996                 if (!data->symlink_target)
 997                         return -ENOMEM;
 998         }
 999         return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
1000 }
1001
1002 #ifdef CONFIG_CIFS_XATTR
1003 static ssize_t
1004 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
1005                      struct smb2_file_full_ea_info *src, size_t src_size,
1006                      const unsigned char *ea_name)
1007 {
1008         int rc = 0;
1009         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
1010         char *name, *value;
1011         size_t buf_size = dst_size;
1012         size_t name_len, value_len, user_name_len;
1013
1014         while (src_size > 0) {
1015                 name_len = (size_t)src->ea_name_length;
1016                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
1017
1018                 if (name_len == 0)
1019                         break;
1020
1021                 if (src_size < 8 + name_len + 1 + value_len) {
1022                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
1023                         rc = -EIO;
1024                         goto out;
1025                 }
1026
1027                 name = &src->ea_data[0];
1028                 value = &src->ea_data[src->ea_name_length + 1];
1029
1030                 if (ea_name) {
1031                         if (ea_name_len == name_len &&
1032                             memcmp(ea_name, name, name_len) == 0) {
1033                                 rc = value_len;
1034                                 if (dst_size == 0)
1035                                         goto out;
1036                                 if (dst_size < value_len) {
1037                                         rc = -ERANGE;
1038                                         goto out;
1039                                 }
1040                                 memcpy(dst, value, value_len);
1041                                 goto out;
1042                         }
1043                 } else {
1044                         /* 'user.' plus a terminating null */
1045                         user_name_len = 5 + 1 + name_len;
1046
1047                         if (buf_size == 0) {
1048                                 /* skip copy - calc size only */
1049                                 rc += user_name_len;
1050                         } else if (dst_size >= user_name_len) {
1051                                 dst_size -= user_name_len;
1052                                 memcpy(dst, "user.", 5);
1053                                 dst += 5;
1054                                 memcpy(dst, src->ea_data, name_len);
1055                                 dst += name_len;
1056                                 *dst = 0;
1057                                 ++dst;
1058                                 rc += user_name_len;
1059                         } else {
1060                                 /* stop before overrun buffer */
1061                                 rc = -ERANGE;
1062                                 break;
1063                         }
1064                 }
1065
1066                 if (!src->next_entry_offset)
1067                         break;
1068
1069                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1070                         /* stop before overrun buffer */
1071                         rc = -ERANGE;
1072                         break;
1073                 }
1074                 src_size -= le32_to_cpu(src->next_entry_offset);
1075                 src = (void *)((char *)src +
1076                                le32_to_cpu(src->next_entry_offset));
1077         }
1078
1079         /* didn't find the named attribute */
1080         if (ea_name)
1081                 rc = -ENODATA;
1082
1083 out:
1084         return (ssize_t)rc;
1085 }
1086
1087 static ssize_t
1088 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1089                const unsigned char *path, const unsigned char *ea_name,
1090                char *ea_data, size_t buf_size,
1091                struct cifs_sb_info *cifs_sb)
1092 {
1093         int rc;
1094         struct kvec rsp_iov = {NULL, 0};
1095         int buftype = CIFS_NO_BUFFER;
1096         struct smb2_query_info_rsp *rsp;
1097         struct smb2_file_full_ea_info *info = NULL;
1098
1099         rc = smb2_query_info_compound(xid, tcon, path,
1100                                       FILE_READ_EA,
1101                                       FILE_FULL_EA_INFORMATION,
1102                                       SMB2_O_INFO_FILE,
1103                                       CIFSMaxBufSize -
1104                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1105                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1106                                       &rsp_iov, &buftype, cifs_sb);
1107         if (rc) {
1108                 /*
1109                  * If ea_name is NULL (listxattr) and there are no EAs,
1110                  * return 0 as it's not an error. Otherwise, the specified
1111                  * ea_name was not found.
1112                  */
1113                 if (!ea_name && rc == -ENODATA)
1114                         rc = 0;
1115                 goto qeas_exit;
1116         }
1117
1118         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1119         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1120                                le32_to_cpu(rsp->OutputBufferLength),
1121                                &rsp_iov,
1122                                sizeof(struct smb2_file_full_ea_info));
1123         if (rc)
1124                 goto qeas_exit;
1125
1126         info = (struct smb2_file_full_ea_info *)(
1127                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1128         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1129                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1130
1131  qeas_exit:
1132         free_rsp_buf(buftype, rsp_iov.iov_base);
1133         return rc;
1134 }
1135
1136 static int
1137 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1138             const char *path, const char *ea_name, const void *ea_value,
1139             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1140             struct cifs_sb_info *cifs_sb)
1141 {
1142         struct smb2_compound_vars *vars;
1143         struct cifs_ses *ses = tcon->ses;
1144         struct TCP_Server_Info *server;
1145         struct smb_rqst *rqst;
1146         struct kvec *rsp_iov;
1147         __le16 *utf16_path = NULL;
1148         int ea_name_len = strlen(ea_name);
1149         int flags = CIFS_CP_CREATE_CLOSE_OP;
1150         int len;
1151         int resp_buftype[3];
1152         struct cifs_open_parms oparms;
1153         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1154         struct cifs_fid fid;
1155         unsigned int size[1];
1156         void *data[1];
1157         struct smb2_file_full_ea_info *ea = NULL;
1158         struct smb2_query_info_rsp *rsp;
1159         int rc, used_len = 0;
1160         int retries = 0, cur_sleep = 1;
1161
1162 replay_again:
1163         /* reinitialize for possible replay */
1164         flags = CIFS_CP_CREATE_CLOSE_OP;
1165         oplock = SMB2_OPLOCK_LEVEL_NONE;
1166         server = cifs_pick_channel(ses);
1167
1168         if (smb3_encryption_required(tcon))
1169                 flags |= CIFS_TRANSFORM_REQ;
1170
1171         if (ea_name_len > 255)
1172                 return -EINVAL;
1173
1174         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1175         if (!utf16_path)
1176                 return -ENOMEM;
1177
1178         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1179         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
1180         if (!vars) {
1181                 rc = -ENOMEM;
1182                 goto out_free_path;
1183         }
1184         rqst = vars->rqst;
1185         rsp_iov = vars->rsp_iov;
1186
1187         if (ses->server->ops->query_all_EAs) {
1188                 if (!ea_value) {
1189                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1190                                                              ea_name, NULL, 0,
1191                                                              cifs_sb);
1192                         if (rc == -ENODATA)
1193                                 goto sea_exit;
1194                 } else {
1195                         /* If we are adding a attribute we should first check
1196                          * if there will be enough space available to store
1197                          * the new EA. If not we should not add it since we
1198                          * would not be able to even read the EAs back.
1199                          */
1200                         rc = smb2_query_info_compound(xid, tcon, path,
1201                                       FILE_READ_EA,
1202                                       FILE_FULL_EA_INFORMATION,
1203                                       SMB2_O_INFO_FILE,
1204                                       CIFSMaxBufSize -
1205                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1206                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1207                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1208                         if (rc == 0) {
1209                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1210                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1211                         }
1212                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1213                         resp_buftype[1] = CIFS_NO_BUFFER;
1214                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1215                         rc = 0;
1216
1217                         /* Use a fudge factor of 256 bytes in case we collide
1218                          * with a different set_EAs command.
1219                          */
1220                         if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1221                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1222                            used_len + ea_name_len + ea_value_len + 1) {
1223                                 rc = -ENOSPC;
1224                                 goto sea_exit;
1225                         }
1226                 }
1227         }
1228
1229         /* Open */
1230         rqst[0].rq_iov = vars->open_iov;
1231         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1232
1233         oparms = (struct cifs_open_parms) {
1234                 .tcon = tcon,
1235                 .path = path,
1236                 .desired_access = FILE_WRITE_EA,
1237                 .disposition = FILE_OPEN,
1238                 .create_options = cifs_create_options(cifs_sb, 0),
1239                 .fid = &fid,
1240                 .replay = !!(retries),
1241         };
1242
1243         rc = SMB2_open_init(tcon, server,
1244                             &rqst[0], &oplock, &oparms, utf16_path);
1245         if (rc)
1246                 goto sea_exit;
1247         smb2_set_next_command(tcon, &rqst[0]);
1248
1249
1250         /* Set Info */
1251         rqst[1].rq_iov = vars->si_iov;
1252         rqst[1].rq_nvec = 1;
1253
1254         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1255         ea = kzalloc(len, GFP_KERNEL);
1256         if (ea == NULL) {
1257                 rc = -ENOMEM;
1258                 goto sea_exit;
1259         }
1260
1261         ea->ea_name_length = ea_name_len;
1262         ea->ea_value_length = cpu_to_le16(ea_value_len);
1263         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1264         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1265
1266         size[0] = len;
1267         data[0] = ea;
1268
1269         rc = SMB2_set_info_init(tcon, server,
1270                                 &rqst[1], COMPOUND_FID,
1271                                 COMPOUND_FID, current->tgid,
1272                                 FILE_FULL_EA_INFORMATION,
1273                                 SMB2_O_INFO_FILE, 0, data, size);
1274         if (rc)
1275                 goto sea_exit;
1276         smb2_set_next_command(tcon, &rqst[1]);
1277         smb2_set_related(&rqst[1]);
1278
1279         /* Close */
1280         rqst[2].rq_iov = &vars->close_iov;
1281         rqst[2].rq_nvec = 1;
1282         rc = SMB2_close_init(tcon, server,
1283                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1284         if (rc)
1285                 goto sea_exit;
1286         smb2_set_related(&rqst[2]);
1287
1288         if (retries) {
1289                 smb2_set_replay(server, &rqst[0]);
1290                 smb2_set_replay(server, &rqst[1]);
1291                 smb2_set_replay(server, &rqst[2]);
1292         }
1293
1294         rc = compound_send_recv(xid, ses, server,
1295                                 flags, 3, rqst,
1296                                 resp_buftype, rsp_iov);
1297         /* no need to bump num_remote_opens because handle immediately closed */
1298
1299  sea_exit:
1300         kfree(ea);
1301         SMB2_open_free(&rqst[0]);
1302         SMB2_set_info_free(&rqst[1]);
1303         SMB2_close_free(&rqst[2]);
1304         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1305         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1306         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1307         kfree(vars);
1308 out_free_path:
1309         kfree(utf16_path);
1310
1311         if (is_replayable_error(rc) &&
1312             smb2_should_replay(tcon, &retries, &cur_sleep))
1313                 goto replay_again;
1314
1315         return rc;
1316 }
1317 #endif
1318
1319 static bool
1320 smb2_can_echo(struct TCP_Server_Info *server)
1321 {
1322         return server->echoes;
1323 }
1324
1325 static void
1326 smb2_clear_stats(struct cifs_tcon *tcon)
1327 {
1328         int i;
1329
1330         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1331                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1332                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1333         }
1334 }
1335
1336 static void
1337 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1338 {
1339         seq_puts(m, "\n\tShare Capabilities:");
1340         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1341                 seq_puts(m, " DFS,");
1342         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1343                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1344         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1345                 seq_puts(m, " SCALEOUT,");
1346         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1347                 seq_puts(m, " CLUSTER,");
1348         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1349                 seq_puts(m, " ASYMMETRIC,");
1350         if (tcon->capabilities == 0)
1351                 seq_puts(m, " None");
1352         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1353                 seq_puts(m, " Aligned,");
1354         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1355                 seq_puts(m, " Partition Aligned,");
1356         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1357                 seq_puts(m, " SSD,");
1358         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1359                 seq_puts(m, " TRIM-support,");
1360
1361         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1362         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1363         if (tcon->perf_sector_size)
1364                 seq_printf(m, "\tOptimal sector size: 0x%x",
1365                            tcon->perf_sector_size);
1366         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1367 }
1368
1369 static void
1370 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1371 {
1372         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1373         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1374
1375         /*
1376          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1377          *  totals (requests sent) since those SMBs are per-session not per tcon
1378          */
1379         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1380                    (long long)(tcon->bytes_read),
1381                    (long long)(tcon->bytes_written));
1382         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1383                    atomic_read(&tcon->num_local_opens),
1384                    atomic_read(&tcon->num_remote_opens));
1385         seq_printf(m, "\nTreeConnects: %d total %d failed",
1386                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1387                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1388         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1389                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1390                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1391         seq_printf(m, "\nCreates: %d total %d failed",
1392                    atomic_read(&sent[SMB2_CREATE_HE]),
1393                    atomic_read(&failed[SMB2_CREATE_HE]));
1394         seq_printf(m, "\nCloses: %d total %d failed",
1395                    atomic_read(&sent[SMB2_CLOSE_HE]),
1396                    atomic_read(&failed[SMB2_CLOSE_HE]));
1397         seq_printf(m, "\nFlushes: %d total %d failed",
1398                    atomic_read(&sent[SMB2_FLUSH_HE]),
1399                    atomic_read(&failed[SMB2_FLUSH_HE]));
1400         seq_printf(m, "\nReads: %d total %d failed",
1401                    atomic_read(&sent[SMB2_READ_HE]),
1402                    atomic_read(&failed[SMB2_READ_HE]));
1403         seq_printf(m, "\nWrites: %d total %d failed",
1404                    atomic_read(&sent[SMB2_WRITE_HE]),
1405                    atomic_read(&failed[SMB2_WRITE_HE]));
1406         seq_printf(m, "\nLocks: %d total %d failed",
1407                    atomic_read(&sent[SMB2_LOCK_HE]),
1408                    atomic_read(&failed[SMB2_LOCK_HE]));
1409         seq_printf(m, "\nIOCTLs: %d total %d failed",
1410                    atomic_read(&sent[SMB2_IOCTL_HE]),
1411                    atomic_read(&failed[SMB2_IOCTL_HE]));
1412         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1413                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1414                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1415         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1416                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1417                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1418         seq_printf(m, "\nQueryInfos: %d total %d failed",
1419                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1420                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1421         seq_printf(m, "\nSetInfos: %d total %d failed",
1422                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1423                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1424         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1425                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1426                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1427 }
1428
1429 static void
1430 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1431 {
1432         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1433         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1434
1435         cfile->fid.persistent_fid = fid->persistent_fid;
1436         cfile->fid.volatile_fid = fid->volatile_fid;
1437         cfile->fid.access = fid->access;
1438 #ifdef CONFIG_CIFS_DEBUG2
1439         cfile->fid.mid = fid->mid;
1440 #endif /* CIFS_DEBUG2 */
1441         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1442                                       &fid->purge_cache);
1443         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1444         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1445 }
1446
1447 static int
1448 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1449                 struct cifs_fid *fid)
1450 {
1451         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1452 }
1453
1454 static int
1455 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1456                    struct cifsFileInfo *cfile)
1457 {
1458         struct smb2_file_network_open_info file_inf;
1459         struct inode *inode;
1460         int rc;
1461
1462         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1463                    cfile->fid.volatile_fid, &file_inf);
1464         if (rc)
1465                 return rc;
1466
1467         inode = d_inode(cfile->dentry);
1468
1469         spin_lock(&inode->i_lock);
1470         CIFS_I(inode)->time = jiffies;
1471
1472         /* Creation time should not need to be updated on close */
1473         if (file_inf.LastWriteTime)
1474                 inode_set_mtime_to_ts(inode,
1475                                       cifs_NTtimeToUnix(file_inf.LastWriteTime));
1476         if (file_inf.ChangeTime)
1477                 inode_set_ctime_to_ts(inode,
1478                                       cifs_NTtimeToUnix(file_inf.ChangeTime));
1479         if (file_inf.LastAccessTime)
1480                 inode_set_atime_to_ts(inode,
1481                                       cifs_NTtimeToUnix(file_inf.LastAccessTime));
1482
1483         /*
1484          * i_blocks is not related to (i_size / i_blksize),
1485          * but instead 512 byte (2**9) size is required for
1486          * calculating num blocks.
1487          */
1488         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1489                 inode->i_blocks =
1490                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1491
1492         /* End of file and Attributes should not have to be updated on close */
1493         spin_unlock(&inode->i_lock);
1494         return rc;
1495 }
1496
1497 static int
1498 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1499                      u64 persistent_fid, u64 volatile_fid,
1500                      struct copychunk_ioctl *pcchunk)
1501 {
1502         int rc;
1503         unsigned int ret_data_len;
1504         struct resume_key_req *res_key;
1505
1506         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1507                         FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1508                         CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1509
1510         if (rc == -EOPNOTSUPP) {
1511                 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1512                 goto req_res_key_exit;
1513         } else if (rc) {
1514                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1515                 goto req_res_key_exit;
1516         }
1517         if (ret_data_len < sizeof(struct resume_key_req)) {
1518                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1519                 rc = -EINVAL;
1520                 goto req_res_key_exit;
1521         }
1522         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1523
1524 req_res_key_exit:
1525         kfree(res_key);
1526         return rc;
1527 }
1528
1529 static int
1530 smb2_ioctl_query_info(const unsigned int xid,
1531                       struct cifs_tcon *tcon,
1532                       struct cifs_sb_info *cifs_sb,
1533                       __le16 *path, int is_dir,
1534                       unsigned long p)
1535 {
1536         struct smb2_compound_vars *vars;
1537         struct smb_rqst *rqst;
1538         struct kvec *rsp_iov;
1539         struct cifs_ses *ses = tcon->ses;
1540         struct TCP_Server_Info *server;
1541         char __user *arg = (char __user *)p;
1542         struct smb_query_info qi;
1543         struct smb_query_info __user *pqi;
1544         int rc = 0;
1545         int flags = CIFS_CP_CREATE_CLOSE_OP;
1546         struct smb2_query_info_rsp *qi_rsp = NULL;
1547         struct smb2_ioctl_rsp *io_rsp = NULL;
1548         void *buffer = NULL;
1549         int resp_buftype[3];
1550         struct cifs_open_parms oparms;
1551         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1552         struct cifs_fid fid;
1553         unsigned int size[2];
1554         void *data[2];
1555         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1556         void (*free_req1_func)(struct smb_rqst *r);
1557         int retries = 0, cur_sleep = 1;
1558
1559 replay_again:
1560         /* reinitialize for possible replay */
1561         flags = CIFS_CP_CREATE_CLOSE_OP;
1562         oplock = SMB2_OPLOCK_LEVEL_NONE;
1563         server = cifs_pick_channel(ses);
1564
1565         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1566         if (vars == NULL)
1567                 return -ENOMEM;
1568         rqst = &vars->rqst[0];
1569         rsp_iov = &vars->rsp_iov[0];
1570
1571         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1572
1573         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1574                 rc = -EFAULT;
1575                 goto free_vars;
1576         }
1577         if (qi.output_buffer_length > 1024) {
1578                 rc = -EINVAL;
1579                 goto free_vars;
1580         }
1581
1582         if (!ses || !server) {
1583                 rc = -EIO;
1584                 goto free_vars;
1585         }
1586
1587         if (smb3_encryption_required(tcon))
1588                 flags |= CIFS_TRANSFORM_REQ;
1589
1590         if (qi.output_buffer_length) {
1591                 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1592                 if (IS_ERR(buffer)) {
1593                         rc = PTR_ERR(buffer);
1594                         goto free_vars;
1595                 }
1596         }
1597
1598         /* Open */
1599         rqst[0].rq_iov = &vars->open_iov[0];
1600         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1601
1602         oparms = (struct cifs_open_parms) {
1603                 .tcon = tcon,
1604                 .disposition = FILE_OPEN,
1605                 .create_options = cifs_create_options(cifs_sb, create_options),
1606                 .fid = &fid,
1607                 .replay = !!(retries),
1608         };
1609
1610         if (qi.flags & PASSTHRU_FSCTL) {
1611                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1612                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1613                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1614                         break;
1615                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1616                         oparms.desired_access = GENERIC_ALL;
1617                         break;
1618                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1619                         oparms.desired_access = GENERIC_READ;
1620                         break;
1621                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1622                         oparms.desired_access = GENERIC_WRITE;
1623                         break;
1624                 }
1625         } else if (qi.flags & PASSTHRU_SET_INFO) {
1626                 oparms.desired_access = GENERIC_WRITE;
1627         } else {
1628                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1629         }
1630
1631         rc = SMB2_open_init(tcon, server,
1632                             &rqst[0], &oplock, &oparms, path);
1633         if (rc)
1634                 goto free_output_buffer;
1635         smb2_set_next_command(tcon, &rqst[0]);
1636
1637         /* Query */
1638         if (qi.flags & PASSTHRU_FSCTL) {
1639                 /* Can eventually relax perm check since server enforces too */
1640                 if (!capable(CAP_SYS_ADMIN)) {
1641                         rc = -EPERM;
1642                         goto free_open_req;
1643                 }
1644                 rqst[1].rq_iov = &vars->io_iov[0];
1645                 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1646
1647                 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1648                                      qi.info_type, buffer, qi.output_buffer_length,
1649                                      CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1650                                      MAX_SMB2_CLOSE_RESPONSE_SIZE);
1651                 free_req1_func = SMB2_ioctl_free;
1652         } else if (qi.flags == PASSTHRU_SET_INFO) {
1653                 /* Can eventually relax perm check since server enforces too */
1654                 if (!capable(CAP_SYS_ADMIN)) {
1655                         rc = -EPERM;
1656                         goto free_open_req;
1657                 }
1658                 if (qi.output_buffer_length < 8) {
1659                         rc = -EINVAL;
1660                         goto free_open_req;
1661                 }
1662                 rqst[1].rq_iov = vars->si_iov;
1663                 rqst[1].rq_nvec = 1;
1664
1665                 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1666                 size[0] = 8;
1667                 data[0] = buffer;
1668
1669                 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1670                                         current->tgid, FILE_END_OF_FILE_INFORMATION,
1671                                         SMB2_O_INFO_FILE, 0, data, size);
1672                 free_req1_func = SMB2_set_info_free;
1673         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1674                 rqst[1].rq_iov = &vars->qi_iov;
1675                 rqst[1].rq_nvec = 1;
1676
1677                 rc = SMB2_query_info_init(tcon, server,
1678                                   &rqst[1], COMPOUND_FID,
1679                                   COMPOUND_FID, qi.file_info_class,
1680                                   qi.info_type, qi.additional_information,
1681                                   qi.input_buffer_length,
1682                                   qi.output_buffer_length, buffer);
1683                 free_req1_func = SMB2_query_info_free;
1684         } else { /* unknown flags */
1685                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1686                               qi.flags);
1687                 rc = -EINVAL;
1688         }
1689
1690         if (rc)
1691                 goto free_open_req;
1692         smb2_set_next_command(tcon, &rqst[1]);
1693         smb2_set_related(&rqst[1]);
1694
1695         /* Close */
1696         rqst[2].rq_iov = &vars->close_iov;
1697         rqst[2].rq_nvec = 1;
1698
1699         rc = SMB2_close_init(tcon, server,
1700                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1701         if (rc)
1702                 goto free_req_1;
1703         smb2_set_related(&rqst[2]);
1704
1705         if (retries) {
1706                 smb2_set_replay(server, &rqst[0]);
1707                 smb2_set_replay(server, &rqst[1]);
1708                 smb2_set_replay(server, &rqst[2]);
1709         }
1710
1711         rc = compound_send_recv(xid, ses, server,
1712                                 flags, 3, rqst,
1713                                 resp_buftype, rsp_iov);
1714         if (rc)
1715                 goto out;
1716
1717         /* No need to bump num_remote_opens since handle immediately closed */
1718         if (qi.flags & PASSTHRU_FSCTL) {
1719                 pqi = (struct smb_query_info __user *)arg;
1720                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1721                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1722                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1723                 if (qi.input_buffer_length > 0 &&
1724                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1725                     > rsp_iov[1].iov_len) {
1726                         rc = -EFAULT;
1727                         goto out;
1728                 }
1729
1730                 if (copy_to_user(&pqi->input_buffer_length,
1731                                  &qi.input_buffer_length,
1732                                  sizeof(qi.input_buffer_length))) {
1733                         rc = -EFAULT;
1734                         goto out;
1735                 }
1736
1737                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1738                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1739                                  qi.input_buffer_length))
1740                         rc = -EFAULT;
1741         } else {
1742                 pqi = (struct smb_query_info __user *)arg;
1743                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1744                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1745                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1746                 if (copy_to_user(&pqi->input_buffer_length,
1747                                  &qi.input_buffer_length,
1748                                  sizeof(qi.input_buffer_length))) {
1749                         rc = -EFAULT;
1750                         goto out;
1751                 }
1752
1753                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1754                                  qi.input_buffer_length))
1755                         rc = -EFAULT;
1756         }
1757
1758 out:
1759         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1760         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1761         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1762         SMB2_close_free(&rqst[2]);
1763 free_req_1:
1764         free_req1_func(&rqst[1]);
1765 free_open_req:
1766         SMB2_open_free(&rqst[0]);
1767 free_output_buffer:
1768         kfree(buffer);
1769 free_vars:
1770         kfree(vars);
1771
1772         if (is_replayable_error(rc) &&
1773             smb2_should_replay(tcon, &retries, &cur_sleep))
1774                 goto replay_again;
1775
1776         return rc;
1777 }
1778
1779 static ssize_t
1780 smb2_copychunk_range(const unsigned int xid,
1781                         struct cifsFileInfo *srcfile,
1782                         struct cifsFileInfo *trgtfile, u64 src_off,
1783                         u64 len, u64 dest_off)
1784 {
1785         int rc;
1786         unsigned int ret_data_len;
1787         struct copychunk_ioctl *pcchunk;
1788         struct copychunk_ioctl_rsp *retbuf = NULL;
1789         struct cifs_tcon *tcon;
1790         int chunks_copied = 0;
1791         bool chunk_sizes_updated = false;
1792         ssize_t bytes_written, total_bytes_written = 0;
1793
1794         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1795         if (pcchunk == NULL)
1796                 return -ENOMEM;
1797
1798         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1799         /* Request a key from the server to identify the source of the copy */
1800         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1801                                 srcfile->fid.persistent_fid,
1802                                 srcfile->fid.volatile_fid, pcchunk);
1803
1804         /* Note: request_res_key sets res_key null only if rc !=0 */
1805         if (rc)
1806                 goto cchunk_out;
1807
1808         /* For now array only one chunk long, will make more flexible later */
1809         pcchunk->ChunkCount = cpu_to_le32(1);
1810         pcchunk->Reserved = 0;
1811         pcchunk->Reserved2 = 0;
1812
1813         tcon = tlink_tcon(trgtfile->tlink);
1814
1815         while (len > 0) {
1816                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1817                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1818                 pcchunk->Length =
1819                         cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1820
1821                 /* Request server copy to target from src identified by key */
1822                 kfree(retbuf);
1823                 retbuf = NULL;
1824                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1825                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1826                         (char *)pcchunk, sizeof(struct copychunk_ioctl),
1827                         CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1828                 if (rc == 0) {
1829                         if (ret_data_len !=
1830                                         sizeof(struct copychunk_ioctl_rsp)) {
1831                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1832                                 rc = -EIO;
1833                                 goto cchunk_out;
1834                         }
1835                         if (retbuf->TotalBytesWritten == 0) {
1836                                 cifs_dbg(FYI, "no bytes copied\n");
1837                                 rc = -EIO;
1838                                 goto cchunk_out;
1839                         }
1840                         /*
1841                          * Check if server claimed to write more than we asked
1842                          */
1843                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1844                             le32_to_cpu(pcchunk->Length)) {
1845                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1846                                 rc = -EIO;
1847                                 goto cchunk_out;
1848                         }
1849                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1850                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1851                                 rc = -EIO;
1852                                 goto cchunk_out;
1853                         }
1854                         chunks_copied++;
1855
1856                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1857                         src_off += bytes_written;
1858                         dest_off += bytes_written;
1859                         len -= bytes_written;
1860                         total_bytes_written += bytes_written;
1861
1862                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1863                                 le32_to_cpu(retbuf->ChunksWritten),
1864                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1865                                 bytes_written);
1866                 } else if (rc == -EINVAL) {
1867                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1868                                 goto cchunk_out;
1869
1870                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1871                                 le32_to_cpu(retbuf->ChunksWritten),
1872                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1873                                 le32_to_cpu(retbuf->TotalBytesWritten));
1874
1875                         /*
1876                          * Check if this is the first request using these sizes,
1877                          * (ie check if copy succeed once with original sizes
1878                          * and check if the server gave us different sizes after
1879                          * we already updated max sizes on previous request).
1880                          * if not then why is the server returning an error now
1881                          */
1882                         if ((chunks_copied != 0) || chunk_sizes_updated)
1883                                 goto cchunk_out;
1884
1885                         /* Check that server is not asking us to grow size */
1886                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1887                                         tcon->max_bytes_chunk)
1888                                 tcon->max_bytes_chunk =
1889                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1890                         else
1891                                 goto cchunk_out; /* server gave us bogus size */
1892
1893                         /* No need to change MaxChunks since already set to 1 */
1894                         chunk_sizes_updated = true;
1895                 } else
1896                         goto cchunk_out;
1897         }
1898
1899 cchunk_out:
1900         kfree(pcchunk);
1901         kfree(retbuf);
1902         if (rc)
1903                 return rc;
1904         else
1905                 return total_bytes_written;
1906 }
1907
1908 static int
1909 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1910                 struct cifs_fid *fid)
1911 {
1912         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1913 }
1914
1915 static unsigned int
1916 smb2_read_data_offset(char *buf)
1917 {
1918         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1919
1920         return rsp->DataOffset;
1921 }
1922
1923 static unsigned int
1924 smb2_read_data_length(char *buf, bool in_remaining)
1925 {
1926         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1927
1928         if (in_remaining)
1929                 return le32_to_cpu(rsp->DataRemaining);
1930
1931         return le32_to_cpu(rsp->DataLength);
1932 }
1933
1934
1935 static int
1936 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1937                struct cifs_io_parms *parms, unsigned int *bytes_read,
1938                char **buf, int *buf_type)
1939 {
1940         parms->persistent_fid = pfid->persistent_fid;
1941         parms->volatile_fid = pfid->volatile_fid;
1942         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1943 }
1944
1945 static int
1946 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1947                 struct cifs_io_parms *parms, unsigned int *written,
1948                 struct kvec *iov, unsigned long nr_segs)
1949 {
1950
1951         parms->persistent_fid = pfid->persistent_fid;
1952         parms->volatile_fid = pfid->volatile_fid;
1953         return SMB2_write(xid, parms, written, iov, nr_segs);
1954 }
1955
1956 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1957 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1958                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1959 {
1960         struct cifsInodeInfo *cifsi;
1961         int rc;
1962
1963         cifsi = CIFS_I(inode);
1964
1965         /* if file already sparse don't bother setting sparse again */
1966         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1967                 return true; /* already sparse */
1968
1969         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1970                 return true; /* already not sparse */
1971
1972         /*
1973          * Can't check for sparse support on share the usual way via the
1974          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1975          * since Samba server doesn't set the flag on the share, yet
1976          * supports the set sparse FSCTL and returns sparse correctly
1977          * in the file attributes. If we fail setting sparse though we
1978          * mark that server does not support sparse files for this share
1979          * to avoid repeatedly sending the unsupported fsctl to server
1980          * if the file is repeatedly extended.
1981          */
1982         if (tcon->broken_sparse_sup)
1983                 return false;
1984
1985         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1986                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1987                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1988         if (rc) {
1989                 tcon->broken_sparse_sup = true;
1990                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1991                 return false;
1992         }
1993
1994         if (setsparse)
1995                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1996         else
1997                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1998
1999         return true;
2000 }
2001
2002 static int
2003 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
2004                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
2005 {
2006         struct inode *inode;
2007
2008         /*
2009          * If extending file more than one page make sparse. Many Linux fs
2010          * make files sparse by default when extending via ftruncate
2011          */
2012         inode = d_inode(cfile->dentry);
2013
2014         if (!set_alloc && (size > inode->i_size + 8192)) {
2015                 __u8 set_sparse = 1;
2016
2017                 /* whether set sparse succeeds or not, extend the file */
2018                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
2019         }
2020
2021         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
2022                             cfile->fid.volatile_fid, cfile->pid, size);
2023 }
2024
2025 static int
2026 smb2_duplicate_extents(const unsigned int xid,
2027                         struct cifsFileInfo *srcfile,
2028                         struct cifsFileInfo *trgtfile, u64 src_off,
2029                         u64 len, u64 dest_off)
2030 {
2031         int rc;
2032         unsigned int ret_data_len;
2033         struct inode *inode;
2034         struct duplicate_extents_to_file dup_ext_buf;
2035         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
2036
2037         /* server fileays advertise duplicate extent support with this flag */
2038         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
2039              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
2040                 return -EOPNOTSUPP;
2041
2042         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
2043         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
2044         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
2045         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
2046         dup_ext_buf.ByteCount = cpu_to_le64(len);
2047         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
2048                 src_off, dest_off, len);
2049
2050         inode = d_inode(trgtfile->dentry);
2051         if (inode->i_size < dest_off + len) {
2052                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
2053                 if (rc)
2054                         goto duplicate_extents_out;
2055
2056                 /*
2057                  * Although also could set plausible allocation size (i_blocks)
2058                  * here in addition to setting the file size, in reflink
2059                  * it is likely that the target file is sparse. Its allocation
2060                  * size will be queried on next revalidate, but it is important
2061                  * to make sure that file's cached size is updated immediately
2062                  */
2063                 netfs_resize_file(netfs_inode(inode), dest_off + len, true);
2064                 cifs_setsize(inode, dest_off + len);
2065         }
2066         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
2067                         trgtfile->fid.volatile_fid,
2068                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
2069                         (char *)&dup_ext_buf,
2070                         sizeof(struct duplicate_extents_to_file),
2071                         CIFSMaxBufSize, NULL,
2072                         &ret_data_len);
2073
2074         if (ret_data_len > 0)
2075                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
2076
2077 duplicate_extents_out:
2078         return rc;
2079 }
2080
2081 static int
2082 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2083                    struct cifsFileInfo *cfile)
2084 {
2085         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2086                             cfile->fid.volatile_fid);
2087 }
2088
2089 static int
2090 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2091                    struct cifsFileInfo *cfile)
2092 {
2093         struct fsctl_set_integrity_information_req integr_info;
2094         unsigned int ret_data_len;
2095
2096         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2097         integr_info.Flags = 0;
2098         integr_info.Reserved = 0;
2099
2100         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2101                         cfile->fid.volatile_fid,
2102                         FSCTL_SET_INTEGRITY_INFORMATION,
2103                         (char *)&integr_info,
2104                         sizeof(struct fsctl_set_integrity_information_req),
2105                         CIFSMaxBufSize, NULL,
2106                         &ret_data_len);
2107
2108 }
2109
2110 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2111 #define GMT_TOKEN_SIZE 50
2112
2113 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2114
2115 /*
2116  * Input buffer contains (empty) struct smb_snapshot array with size filled in
2117  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2118  */
2119 static int
2120 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2121                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2122 {
2123         char *retbuf = NULL;
2124         unsigned int ret_data_len = 0;
2125         int rc;
2126         u32 max_response_size;
2127         struct smb_snapshot_array snapshot_in;
2128
2129         /*
2130          * On the first query to enumerate the list of snapshots available
2131          * for this volume the buffer begins with 0 (number of snapshots
2132          * which can be returned is zero since at that point we do not know
2133          * how big the buffer needs to be). On the second query,
2134          * it (ret_data_len) is set to number of snapshots so we can
2135          * know to set the maximum response size larger (see below).
2136          */
2137         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2138                 return -EFAULT;
2139
2140         /*
2141          * Note that for snapshot queries that servers like Azure expect that
2142          * the first query be minimal size (and just used to get the number/size
2143          * of previous versions) so response size must be specified as EXACTLY
2144          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2145          * of eight bytes.
2146          */
2147         if (ret_data_len == 0)
2148                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2149         else
2150                 max_response_size = CIFSMaxBufSize;
2151
2152         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2153                         cfile->fid.volatile_fid,
2154                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2155                         NULL, 0 /* no input data */, max_response_size,
2156                         (char **)&retbuf,
2157                         &ret_data_len);
2158         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2159                         rc, ret_data_len);
2160         if (rc)
2161                 return rc;
2162
2163         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2164                 /* Fixup buffer */
2165                 if (copy_from_user(&snapshot_in, ioc_buf,
2166                     sizeof(struct smb_snapshot_array))) {
2167                         rc = -EFAULT;
2168                         kfree(retbuf);
2169                         return rc;
2170                 }
2171
2172                 /*
2173                  * Check for min size, ie not large enough to fit even one GMT
2174                  * token (snapshot).  On the first ioctl some users may pass in
2175                  * smaller size (or zero) to simply get the size of the array
2176                  * so the user space caller can allocate sufficient memory
2177                  * and retry the ioctl again with larger array size sufficient
2178                  * to hold all of the snapshot GMT tokens on the second try.
2179                  */
2180                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2181                         ret_data_len = sizeof(struct smb_snapshot_array);
2182
2183                 /*
2184                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2185                  * the snapshot array (of 50 byte GMT tokens) each
2186                  * representing an available previous version of the data
2187                  */
2188                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2189                                         sizeof(struct smb_snapshot_array)))
2190                         ret_data_len = snapshot_in.snapshot_array_size +
2191                                         sizeof(struct smb_snapshot_array);
2192
2193                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2194                         rc = -EFAULT;
2195         }
2196
2197         kfree(retbuf);
2198         return rc;
2199 }
2200
2201
2202
2203 static int
2204 smb3_notify(const unsigned int xid, struct file *pfile,
2205             void __user *ioc_buf, bool return_changes)
2206 {
2207         struct smb3_notify_info notify;
2208         struct smb3_notify_info __user *pnotify_buf;
2209         struct dentry *dentry = pfile->f_path.dentry;
2210         struct inode *inode = file_inode(pfile);
2211         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2212         struct cifs_open_parms oparms;
2213         struct cifs_fid fid;
2214         struct cifs_tcon *tcon;
2215         const unsigned char *path;
2216         char *returned_ioctl_info = NULL;
2217         void *page = alloc_dentry_path();
2218         __le16 *utf16_path = NULL;
2219         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2220         int rc = 0;
2221         __u32 ret_len = 0;
2222
2223         path = build_path_from_dentry(dentry, page);
2224         if (IS_ERR(path)) {
2225                 rc = PTR_ERR(path);
2226                 goto notify_exit;
2227         }
2228
2229         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2230         if (utf16_path == NULL) {
2231                 rc = -ENOMEM;
2232                 goto notify_exit;
2233         }
2234
2235         if (return_changes) {
2236                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
2237                         rc = -EFAULT;
2238                         goto notify_exit;
2239                 }
2240         } else {
2241                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2242                         rc = -EFAULT;
2243                         goto notify_exit;
2244                 }
2245                 notify.data_len = 0;
2246         }
2247
2248         tcon = cifs_sb_master_tcon(cifs_sb);
2249         oparms = (struct cifs_open_parms) {
2250                 .tcon = tcon,
2251                 .path = path,
2252                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2253                 .disposition = FILE_OPEN,
2254                 .create_options = cifs_create_options(cifs_sb, 0),
2255                 .fid = &fid,
2256         };
2257
2258         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2259                        NULL);
2260         if (rc)
2261                 goto notify_exit;
2262
2263         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2264                                 notify.watch_tree, notify.completion_filter,
2265                                 notify.data_len, &returned_ioctl_info, &ret_len);
2266
2267         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2268
2269         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2270         if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2271                 if (ret_len > notify.data_len)
2272                         ret_len = notify.data_len;
2273                 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2274                 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2275                         rc = -EFAULT;
2276                 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2277                         rc = -EFAULT;
2278         }
2279         kfree(returned_ioctl_info);
2280 notify_exit:
2281         free_dentry_path(page);
2282         kfree(utf16_path);
2283         return rc;
2284 }
2285
2286 static int
2287 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2288                      const char *path, struct cifs_sb_info *cifs_sb,
2289                      struct cifs_fid *fid, __u16 search_flags,
2290                      struct cifs_search_info *srch_inf)
2291 {
2292         __le16 *utf16_path;
2293         struct smb_rqst rqst[2];
2294         struct kvec rsp_iov[2];
2295         int resp_buftype[2];
2296         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2297         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2298         int rc, flags = 0;
2299         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2300         struct cifs_open_parms oparms;
2301         struct smb2_query_directory_rsp *qd_rsp = NULL;
2302         struct smb2_create_rsp *op_rsp = NULL;
2303         struct TCP_Server_Info *server;
2304         int retries = 0, cur_sleep = 1;
2305
2306 replay_again:
2307         /* reinitialize for possible replay */
2308         flags = 0;
2309         oplock = SMB2_OPLOCK_LEVEL_NONE;
2310         server = cifs_pick_channel(tcon->ses);
2311
2312         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2313         if (!utf16_path)
2314                 return -ENOMEM;
2315
2316         if (smb3_encryption_required(tcon))
2317                 flags |= CIFS_TRANSFORM_REQ;
2318
2319         memset(rqst, 0, sizeof(rqst));
2320         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2321         memset(rsp_iov, 0, sizeof(rsp_iov));
2322
2323         /* Open */
2324         memset(&open_iov, 0, sizeof(open_iov));
2325         rqst[0].rq_iov = open_iov;
2326         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2327
2328         oparms = (struct cifs_open_parms) {
2329                 .tcon = tcon,
2330                 .path = path,
2331                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2332                 .disposition = FILE_OPEN,
2333                 .create_options = cifs_create_options(cifs_sb, 0),
2334                 .fid = fid,
2335                 .replay = !!(retries),
2336         };
2337
2338         rc = SMB2_open_init(tcon, server,
2339                             &rqst[0], &oplock, &oparms, utf16_path);
2340         if (rc)
2341                 goto qdf_free;
2342         smb2_set_next_command(tcon, &rqst[0]);
2343
2344         /* Query directory */
2345         srch_inf->entries_in_buffer = 0;
2346         srch_inf->index_of_last_entry = 2;
2347
2348         memset(&qd_iov, 0, sizeof(qd_iov));
2349         rqst[1].rq_iov = qd_iov;
2350         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2351
2352         rc = SMB2_query_directory_init(xid, tcon, server,
2353                                        &rqst[1],
2354                                        COMPOUND_FID, COMPOUND_FID,
2355                                        0, srch_inf->info_level);
2356         if (rc)
2357                 goto qdf_free;
2358
2359         smb2_set_related(&rqst[1]);
2360
2361         if (retries) {
2362                 smb2_set_replay(server, &rqst[0]);
2363                 smb2_set_replay(server, &rqst[1]);
2364         }
2365
2366         rc = compound_send_recv(xid, tcon->ses, server,
2367                                 flags, 2, rqst,
2368                                 resp_buftype, rsp_iov);
2369
2370         /* If the open failed there is nothing to do */
2371         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2372         if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2373                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2374                 goto qdf_free;
2375         }
2376         fid->persistent_fid = op_rsp->PersistentFileId;
2377         fid->volatile_fid = op_rsp->VolatileFileId;
2378
2379         /* Anything else than ENODATA means a genuine error */
2380         if (rc && rc != -ENODATA) {
2381                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2382                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2383                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2384                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2385                 goto qdf_free;
2386         }
2387
2388         atomic_inc(&tcon->num_remote_opens);
2389
2390         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2391         if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2392                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2393                                           tcon->tid, tcon->ses->Suid, 0, 0);
2394                 srch_inf->endOfSearch = true;
2395                 rc = 0;
2396                 goto qdf_free;
2397         }
2398
2399         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2400                                         srch_inf);
2401         if (rc) {
2402                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2403                         tcon->ses->Suid, 0, 0, rc);
2404                 goto qdf_free;
2405         }
2406         resp_buftype[1] = CIFS_NO_BUFFER;
2407
2408         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2409                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2410
2411  qdf_free:
2412         kfree(utf16_path);
2413         SMB2_open_free(&rqst[0]);
2414         SMB2_query_directory_free(&rqst[1]);
2415         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2416         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2417
2418         if (is_replayable_error(rc) &&
2419             smb2_should_replay(tcon, &retries, &cur_sleep))
2420                 goto replay_again;
2421
2422         return rc;
2423 }
2424
2425 static int
2426 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2427                     struct cifs_fid *fid, __u16 search_flags,
2428                     struct cifs_search_info *srch_inf)
2429 {
2430         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2431                                     fid->volatile_fid, 0, srch_inf);
2432 }
2433
2434 static int
2435 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2436                struct cifs_fid *fid)
2437 {
2438         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2439 }
2440
2441 /*
2442  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2443  * the number of credits and return true. Otherwise - return false.
2444  */
2445 static bool
2446 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2447 {
2448         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2449         int scredits, in_flight;
2450
2451         if (shdr->Status != STATUS_PENDING)
2452                 return false;
2453
2454         if (shdr->CreditRequest) {
2455                 spin_lock(&server->req_lock);
2456                 server->credits += le16_to_cpu(shdr->CreditRequest);
2457                 scredits = server->credits;
2458                 in_flight = server->in_flight;
2459                 spin_unlock(&server->req_lock);
2460                 wake_up(&server->request_q);
2461
2462                 trace_smb3_pend_credits(server->CurrentMid,
2463                                 server->conn_id, server->hostname, scredits,
2464                                 le16_to_cpu(shdr->CreditRequest), in_flight);
2465                 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2466                                 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2467         }
2468
2469         return true;
2470 }
2471
2472 static bool
2473 smb2_is_session_expired(char *buf)
2474 {
2475         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2476
2477         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2478             shdr->Status != STATUS_USER_SESSION_DELETED)
2479                 return false;
2480
2481         trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2482                                le64_to_cpu(shdr->SessionId),
2483                                le16_to_cpu(shdr->Command),
2484                                le64_to_cpu(shdr->MessageId));
2485         cifs_dbg(FYI, "Session expired or deleted\n");
2486
2487         return true;
2488 }
2489
2490 static bool
2491 smb2_is_status_io_timeout(char *buf)
2492 {
2493         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2494
2495         if (shdr->Status == STATUS_IO_TIMEOUT)
2496                 return true;
2497         else
2498                 return false;
2499 }
2500
2501 static bool
2502 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2503 {
2504         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2505         struct TCP_Server_Info *pserver;
2506         struct cifs_ses *ses;
2507         struct cifs_tcon *tcon;
2508
2509         if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2510                 return false;
2511
2512         /* If server is a channel, select the primary channel */
2513         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
2514
2515         spin_lock(&cifs_tcp_ses_lock);
2516         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2517                 if (cifs_ses_exiting(ses))
2518                         continue;
2519                 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2520                         if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2521                                 spin_lock(&tcon->tc_lock);
2522                                 tcon->need_reconnect = true;
2523                                 spin_unlock(&tcon->tc_lock);
2524                                 spin_unlock(&cifs_tcp_ses_lock);
2525                                 pr_warn_once("Server share %s deleted.\n",
2526                                              tcon->tree_name);
2527                                 return true;
2528                         }
2529                 }
2530         }
2531         spin_unlock(&cifs_tcp_ses_lock);
2532
2533         return false;
2534 }
2535
2536 static int
2537 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2538                 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2539 {
2540         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2541                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2542                                         smb2_get_lease_state(cinode));
2543
2544         return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2545                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2546 }
2547
2548 void
2549 smb2_set_replay(struct TCP_Server_Info *server, struct smb_rqst *rqst)
2550 {
2551         struct smb2_hdr *shdr;
2552
2553         if (server->dialect < SMB30_PROT_ID)
2554                 return;
2555
2556         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2557         if (shdr == NULL) {
2558                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2559                 return;
2560         }
2561         shdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION;
2562 }
2563
2564 void
2565 smb2_set_related(struct smb_rqst *rqst)
2566 {
2567         struct smb2_hdr *shdr;
2568
2569         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2570         if (shdr == NULL) {
2571                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2572                 return;
2573         }
2574         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2575 }
2576
2577 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2578
2579 void
2580 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2581 {
2582         struct smb2_hdr *shdr;
2583         struct cifs_ses *ses = tcon->ses;
2584         struct TCP_Server_Info *server = ses->server;
2585         unsigned long len = smb_rqst_len(server, rqst);
2586         int i, num_padding;
2587
2588         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2589         if (shdr == NULL) {
2590                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2591                 return;
2592         }
2593
2594         /* SMB headers in a compound are 8 byte aligned. */
2595
2596         /* No padding needed */
2597         if (!(len & 7))
2598                 goto finished;
2599
2600         num_padding = 8 - (len & 7);
2601         if (!smb3_encryption_required(tcon)) {
2602                 /*
2603                  * If we do not have encryption then we can just add an extra
2604                  * iov for the padding.
2605                  */
2606                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2607                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2608                 rqst->rq_nvec++;
2609                 len += num_padding;
2610         } else {
2611                 /*
2612                  * We can not add a small padding iov for the encryption case
2613                  * because the encryption framework can not handle the padding
2614                  * iovs.
2615                  * We have to flatten this into a single buffer and add
2616                  * the padding to it.
2617                  */
2618                 for (i = 1; i < rqst->rq_nvec; i++) {
2619                         memcpy(rqst->rq_iov[0].iov_base +
2620                                rqst->rq_iov[0].iov_len,
2621                                rqst->rq_iov[i].iov_base,
2622                                rqst->rq_iov[i].iov_len);
2623                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2624                 }
2625                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2626                        0, num_padding);
2627                 rqst->rq_iov[0].iov_len += num_padding;
2628                 len += num_padding;
2629                 rqst->rq_nvec = 1;
2630         }
2631
2632  finished:
2633         shdr->NextCommand = cpu_to_le32(len);
2634 }
2635
2636 /*
2637  * helper function for exponential backoff and check if replayable
2638  */
2639 bool smb2_should_replay(struct cifs_tcon *tcon,
2640                                 int *pretries,
2641                                 int *pcur_sleep)
2642 {
2643         if (!pretries || !pcur_sleep)
2644                 return false;
2645
2646         if (tcon->retry || (*pretries)++ < tcon->ses->server->retrans) {
2647                 msleep(*pcur_sleep);
2648                 (*pcur_sleep) = ((*pcur_sleep) << 1);
2649                 if ((*pcur_sleep) > CIFS_MAX_SLEEP)
2650                         (*pcur_sleep) = CIFS_MAX_SLEEP;
2651                 return true;
2652         }
2653
2654         return false;
2655 }
2656
2657 /*
2658  * Passes the query info response back to the caller on success.
2659  * Caller need to free this with free_rsp_buf().
2660  */
2661 int
2662 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2663                          const char *path, u32 desired_access,
2664                          u32 class, u32 type, u32 output_len,
2665                          struct kvec *rsp, int *buftype,
2666                          struct cifs_sb_info *cifs_sb)
2667 {
2668         struct smb2_compound_vars *vars;
2669         struct cifs_ses *ses = tcon->ses;
2670         struct TCP_Server_Info *server;
2671         int flags = CIFS_CP_CREATE_CLOSE_OP;
2672         struct smb_rqst *rqst;
2673         int resp_buftype[3];
2674         struct kvec *rsp_iov;
2675         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2676         struct cifs_open_parms oparms;
2677         struct cifs_fid fid;
2678         int rc;
2679         __le16 *utf16_path;
2680         struct cached_fid *cfid = NULL;
2681         int retries = 0, cur_sleep = 1;
2682
2683 replay_again:
2684         /* reinitialize for possible replay */
2685         flags = CIFS_CP_CREATE_CLOSE_OP;
2686         oplock = SMB2_OPLOCK_LEVEL_NONE;
2687         server = cifs_pick_channel(ses);
2688
2689         if (!path)
2690                 path = "";
2691         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2692         if (!utf16_path)
2693                 return -ENOMEM;
2694
2695         if (smb3_encryption_required(tcon))
2696                 flags |= CIFS_TRANSFORM_REQ;
2697
2698         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2699         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
2700         if (!vars) {
2701                 rc = -ENOMEM;
2702                 goto out_free_path;
2703         }
2704         rqst = vars->rqst;
2705         rsp_iov = vars->rsp_iov;
2706
2707         /*
2708          * We can only call this for things we know are directories.
2709          */
2710         if (!strcmp(path, ""))
2711                 open_cached_dir(xid, tcon, path, cifs_sb, false,
2712                                 &cfid); /* cfid null if open dir failed */
2713
2714         rqst[0].rq_iov = vars->open_iov;
2715         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2716
2717         oparms = (struct cifs_open_parms) {
2718                 .tcon = tcon,
2719                 .path = path,
2720                 .desired_access = desired_access,
2721                 .disposition = FILE_OPEN,
2722                 .create_options = cifs_create_options(cifs_sb, 0),
2723                 .fid = &fid,
2724                 .replay = !!(retries),
2725         };
2726
2727         rc = SMB2_open_init(tcon, server,
2728                             &rqst[0], &oplock, &oparms, utf16_path);
2729         if (rc)
2730                 goto qic_exit;
2731         smb2_set_next_command(tcon, &rqst[0]);
2732
2733         rqst[1].rq_iov = &vars->qi_iov;
2734         rqst[1].rq_nvec = 1;
2735
2736         if (cfid) {
2737                 rc = SMB2_query_info_init(tcon, server,
2738                                           &rqst[1],
2739                                           cfid->fid.persistent_fid,
2740                                           cfid->fid.volatile_fid,
2741                                           class, type, 0,
2742                                           output_len, 0,
2743                                           NULL);
2744         } else {
2745                 rc = SMB2_query_info_init(tcon, server,
2746                                           &rqst[1],
2747                                           COMPOUND_FID,
2748                                           COMPOUND_FID,
2749                                           class, type, 0,
2750                                           output_len, 0,
2751                                           NULL);
2752         }
2753         if (rc)
2754                 goto qic_exit;
2755         if (!cfid) {
2756                 smb2_set_next_command(tcon, &rqst[1]);
2757                 smb2_set_related(&rqst[1]);
2758         }
2759
2760         rqst[2].rq_iov = &vars->close_iov;
2761         rqst[2].rq_nvec = 1;
2762
2763         rc = SMB2_close_init(tcon, server,
2764                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2765         if (rc)
2766                 goto qic_exit;
2767         smb2_set_related(&rqst[2]);
2768
2769         if (retries) {
2770                 if (!cfid) {
2771                         smb2_set_replay(server, &rqst[0]);
2772                         smb2_set_replay(server, &rqst[2]);
2773                 }
2774                 smb2_set_replay(server, &rqst[1]);
2775         }
2776
2777         if (cfid) {
2778                 rc = compound_send_recv(xid, ses, server,
2779                                         flags, 1, &rqst[1],
2780                                         &resp_buftype[1], &rsp_iov[1]);
2781         } else {
2782                 rc = compound_send_recv(xid, ses, server,
2783                                         flags, 3, rqst,
2784                                         resp_buftype, rsp_iov);
2785         }
2786         if (rc) {
2787                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2788                 if (rc == -EREMCHG) {
2789                         tcon->need_reconnect = true;
2790                         pr_warn_once("server share %s deleted\n",
2791                                      tcon->tree_name);
2792                 }
2793                 goto qic_exit;
2794         }
2795         *rsp = rsp_iov[1];
2796         *buftype = resp_buftype[1];
2797
2798  qic_exit:
2799         SMB2_open_free(&rqst[0]);
2800         SMB2_query_info_free(&rqst[1]);
2801         SMB2_close_free(&rqst[2]);
2802         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2803         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2804         if (cfid)
2805                 close_cached_dir(cfid);
2806         kfree(vars);
2807 out_free_path:
2808         kfree(utf16_path);
2809
2810         if (is_replayable_error(rc) &&
2811             smb2_should_replay(tcon, &retries, &cur_sleep))
2812                 goto replay_again;
2813
2814         return rc;
2815 }
2816
2817 static int
2818 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2819              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2820 {
2821         struct smb2_query_info_rsp *rsp;
2822         struct smb2_fs_full_size_info *info = NULL;
2823         struct kvec rsp_iov = {NULL, 0};
2824         int buftype = CIFS_NO_BUFFER;
2825         int rc;
2826
2827
2828         rc = smb2_query_info_compound(xid, tcon, "",
2829                                       FILE_READ_ATTRIBUTES,
2830                                       FS_FULL_SIZE_INFORMATION,
2831                                       SMB2_O_INFO_FILESYSTEM,
2832                                       sizeof(struct smb2_fs_full_size_info),
2833                                       &rsp_iov, &buftype, cifs_sb);
2834         if (rc)
2835                 goto qfs_exit;
2836
2837         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2838         buf->f_type = SMB2_SUPER_MAGIC;
2839         info = (struct smb2_fs_full_size_info *)(
2840                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2841         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2842                                le32_to_cpu(rsp->OutputBufferLength),
2843                                &rsp_iov,
2844                                sizeof(struct smb2_fs_full_size_info));
2845         if (!rc)
2846                 smb2_copy_fs_info_to_kstatfs(info, buf);
2847
2848 qfs_exit:
2849         trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc);
2850         free_rsp_buf(buftype, rsp_iov.iov_base);
2851         return rc;
2852 }
2853
2854 static int
2855 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2856                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2857 {
2858         int rc;
2859         __le16 srch_path = 0; /* Null - open root of share */
2860         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2861         struct cifs_open_parms oparms;
2862         struct cifs_fid fid;
2863
2864         if (!tcon->posix_extensions)
2865                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2866
2867         oparms = (struct cifs_open_parms) {
2868                 .tcon = tcon,
2869                 .path = "",
2870                 .desired_access = FILE_READ_ATTRIBUTES,
2871                 .disposition = FILE_OPEN,
2872                 .create_options = cifs_create_options(cifs_sb, 0),
2873                 .fid = &fid,
2874         };
2875
2876         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2877                        NULL, NULL);
2878         if (rc)
2879                 return rc;
2880
2881         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2882                                    fid.volatile_fid, buf);
2883         buf->f_type = SMB2_SUPER_MAGIC;
2884         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2885         return rc;
2886 }
2887
2888 static bool
2889 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2890 {
2891         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2892                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2893 }
2894
2895 static int
2896 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2897                __u64 length, __u32 type, int lock, int unlock, bool wait)
2898 {
2899         if (unlock && !lock)
2900                 type = SMB2_LOCKFLAG_UNLOCK;
2901         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2902                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2903                          current->tgid, length, offset, type, wait);
2904 }
2905
2906 static void
2907 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2908 {
2909         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2910 }
2911
2912 static void
2913 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2914 {
2915         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2916 }
2917
2918 static void
2919 smb2_new_lease_key(struct cifs_fid *fid)
2920 {
2921         generate_random_uuid(fid->lease_key);
2922 }
2923
2924 static int
2925 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2926                    const char *search_name,
2927                    struct dfs_info3_param **target_nodes,
2928                    unsigned int *num_of_nodes,
2929                    const struct nls_table *nls_codepage, int remap)
2930 {
2931         int rc;
2932         __le16 *utf16_path = NULL;
2933         int utf16_path_len = 0;
2934         struct cifs_tcon *tcon;
2935         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2936         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2937         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2938         int retry_count = 0;
2939
2940         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2941
2942         /*
2943          * Try to use the IPC tcon, otherwise just use any
2944          */
2945         tcon = ses->tcon_ipc;
2946         if (tcon == NULL) {
2947                 spin_lock(&cifs_tcp_ses_lock);
2948                 tcon = list_first_entry_or_null(&ses->tcon_list,
2949                                                 struct cifs_tcon,
2950                                                 tcon_list);
2951                 if (tcon) {
2952                         tcon->tc_count++;
2953                         trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count,
2954                                             netfs_trace_tcon_ref_get_dfs_refer);
2955                 }
2956                 spin_unlock(&cifs_tcp_ses_lock);
2957         }
2958
2959         if (tcon == NULL) {
2960                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2961                          ses);
2962                 rc = -ENOTCONN;
2963                 goto out;
2964         }
2965
2966         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2967                                            &utf16_path_len,
2968                                            nls_codepage, remap);
2969         if (!utf16_path) {
2970                 rc = -ENOMEM;
2971                 goto out;
2972         }
2973
2974         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2975         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2976         if (!dfs_req) {
2977                 rc = -ENOMEM;
2978                 goto out;
2979         }
2980
2981         /* Highest DFS referral version understood */
2982         dfs_req->MaxReferralLevel = DFS_VERSION;
2983
2984         /* Path to resolve in an UTF-16 null-terminated string */
2985         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2986
2987         do {
2988                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2989                                 FSCTL_DFS_GET_REFERRALS,
2990                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2991                                 (char **)&dfs_rsp, &dfs_rsp_size);
2992                 if (!is_retryable_error(rc))
2993                         break;
2994                 usleep_range(512, 2048);
2995         } while (++retry_count < 5);
2996
2997         if (!rc && !dfs_rsp)
2998                 rc = -EIO;
2999         if (rc) {
3000                 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
3001                         cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
3002                 goto out;
3003         }
3004
3005         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
3006                                  num_of_nodes, target_nodes,
3007                                  nls_codepage, remap, search_name,
3008                                  true /* is_unicode */);
3009         if (rc) {
3010                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
3011                 goto out;
3012         }
3013
3014  out:
3015         if (tcon && !tcon->ipc) {
3016                 /* ipc tcons are not refcounted */
3017                 spin_lock(&cifs_tcp_ses_lock);
3018                 tcon->tc_count--;
3019                 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count,
3020                                     netfs_trace_tcon_ref_dec_dfs_refer);
3021                 /* tc_count can never go negative */
3022                 WARN_ON(tcon->tc_count < 0);
3023                 spin_unlock(&cifs_tcp_ses_lock);
3024         }
3025         kfree(utf16_path);
3026         kfree(dfs_req);
3027         kfree(dfs_rsp);
3028         return rc;
3029 }
3030
3031 static struct cifs_ntsd *
3032 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3033                     const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3034 {
3035         struct cifs_ntsd *pntsd = NULL;
3036         unsigned int xid;
3037         int rc = -EOPNOTSUPP;
3038         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3039
3040         if (IS_ERR(tlink))
3041                 return ERR_CAST(tlink);
3042
3043         xid = get_xid();
3044         cifs_dbg(FYI, "trying to get acl\n");
3045
3046         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3047                             cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3048                             info);
3049         free_xid(xid);
3050
3051         cifs_put_tlink(tlink);
3052
3053         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3054         if (rc)
3055                 return ERR_PTR(rc);
3056         return pntsd;
3057
3058 }
3059
3060 static struct cifs_ntsd *
3061 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3062                      const char *path, u32 *pacllen, u32 info)
3063 {
3064         struct cifs_ntsd *pntsd = NULL;
3065         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3066         unsigned int xid;
3067         int rc;
3068         struct cifs_tcon *tcon;
3069         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3070         struct cifs_fid fid;
3071         struct cifs_open_parms oparms;
3072         __le16 *utf16_path;
3073
3074         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3075         if (IS_ERR(tlink))
3076                 return ERR_CAST(tlink);
3077
3078         tcon = tlink_tcon(tlink);
3079         xid = get_xid();
3080
3081         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3082         if (!utf16_path) {
3083                 rc = -ENOMEM;
3084                 free_xid(xid);
3085                 return ERR_PTR(rc);
3086         }
3087
3088         oparms = (struct cifs_open_parms) {
3089                 .tcon = tcon,
3090                 .path = path,
3091                 .desired_access = READ_CONTROL,
3092                 .disposition = FILE_OPEN,
3093                 /*
3094                  * When querying an ACL, even if the file is a symlink
3095                  * we want to open the source not the target, and so
3096                  * the protocol requires that the client specify this
3097                  * flag when opening a reparse point
3098                  */
3099                 .create_options = cifs_create_options(cifs_sb, 0) |
3100                                   OPEN_REPARSE_POINT,
3101                 .fid = &fid,
3102         };
3103
3104         if (info & SACL_SECINFO)
3105                 oparms.desired_access |= SYSTEM_SECURITY;
3106
3107         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3108                        NULL);
3109         kfree(utf16_path);
3110         if (!rc) {
3111                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3112                                     fid.volatile_fid, (void **)&pntsd, pacllen,
3113                                     info);
3114                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3115         }
3116
3117         cifs_put_tlink(tlink);
3118         free_xid(xid);
3119
3120         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3121         if (rc)
3122                 return ERR_PTR(rc);
3123         return pntsd;
3124 }
3125
3126 static int
3127 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3128                 struct inode *inode, const char *path, int aclflag)
3129 {
3130         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3131         unsigned int xid;
3132         int rc, access_flags = 0;
3133         struct cifs_tcon *tcon;
3134         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3135         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3136         struct cifs_fid fid;
3137         struct cifs_open_parms oparms;
3138         __le16 *utf16_path;
3139
3140         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3141         if (IS_ERR(tlink))
3142                 return PTR_ERR(tlink);
3143
3144         tcon = tlink_tcon(tlink);
3145         xid = get_xid();
3146
3147         if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3148                 access_flags |= WRITE_OWNER;
3149         if (aclflag & CIFS_ACL_SACL)
3150                 access_flags |= SYSTEM_SECURITY;
3151         if (aclflag & CIFS_ACL_DACL)
3152                 access_flags |= WRITE_DAC;
3153
3154         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3155         if (!utf16_path) {
3156                 rc = -ENOMEM;
3157                 free_xid(xid);
3158                 return rc;
3159         }
3160
3161         oparms = (struct cifs_open_parms) {
3162                 .tcon = tcon,
3163                 .desired_access = access_flags,
3164                 .create_options = cifs_create_options(cifs_sb, 0),
3165                 .disposition = FILE_OPEN,
3166                 .path = path,
3167                 .fid = &fid,
3168         };
3169
3170         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3171                        NULL, NULL);
3172         kfree(utf16_path);
3173         if (!rc) {
3174                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3175                             fid.volatile_fid, pnntsd, acllen, aclflag);
3176                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3177         }
3178
3179         cifs_put_tlink(tlink);
3180         free_xid(xid);
3181         return rc;
3182 }
3183
3184 /* Retrieve an ACL from the server */
3185 static struct cifs_ntsd *
3186 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3187              struct inode *inode, const char *path,
3188              u32 *pacllen, u32 info)
3189 {
3190         struct cifs_ntsd *pntsd = NULL;
3191         struct cifsFileInfo *open_file = NULL;
3192
3193         if (inode && !(info & SACL_SECINFO))
3194                 open_file = find_readable_file(CIFS_I(inode), true);
3195         if (!open_file || (info & SACL_SECINFO))
3196                 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3197
3198         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3199         cifsFileInfo_put(open_file);
3200         return pntsd;
3201 }
3202
3203 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3204                              loff_t offset, loff_t len, unsigned int xid)
3205 {
3206         struct cifsFileInfo *cfile = file->private_data;
3207         struct file_zero_data_information fsctl_buf;
3208
3209         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3210
3211         fsctl_buf.FileOffset = cpu_to_le64(offset);
3212         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3213
3214         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3215                           cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3216                           (char *)&fsctl_buf,
3217                           sizeof(struct file_zero_data_information),
3218                           0, NULL, NULL);
3219 }
3220
3221 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3222                             loff_t offset, loff_t len, bool keep_size)
3223 {
3224         struct cifs_ses *ses = tcon->ses;
3225         struct inode *inode = file_inode(file);
3226         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3227         struct cifsFileInfo *cfile = file->private_data;
3228         unsigned long long new_size;
3229         long rc;
3230         unsigned int xid;
3231
3232         xid = get_xid();
3233
3234         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3235                               ses->Suid, offset, len);
3236
3237         inode_lock(inode);
3238         filemap_invalidate_lock(inode->i_mapping);
3239
3240         /*
3241          * We zero the range through ioctl, so we need remove the page caches
3242          * first, otherwise the data may be inconsistent with the server.
3243          */
3244         truncate_pagecache_range(inode, offset, offset + len - 1);
3245
3246         /* if file not oplocked can't be sure whether asking to extend size */
3247         rc = -EOPNOTSUPP;
3248         if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3249                 goto zero_range_exit;
3250
3251         rc = smb3_zero_data(file, tcon, offset, len, xid);
3252         if (rc < 0)
3253                 goto zero_range_exit;
3254
3255         /*
3256          * do we also need to change the size of the file?
3257          */
3258         new_size = offset + len;
3259         if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) {
3260                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3261                                   cfile->fid.volatile_fid, cfile->pid, new_size);
3262                 if (rc >= 0) {
3263                         truncate_setsize(inode, new_size);
3264                         netfs_resize_file(&cifsi->netfs, new_size, true);
3265                         if (offset < cifsi->netfs.zero_point)
3266                                 cifsi->netfs.zero_point = offset;
3267                         fscache_resize_cookie(cifs_inode_cookie(inode), new_size);
3268                 }
3269         }
3270
3271  zero_range_exit:
3272         filemap_invalidate_unlock(inode->i_mapping);
3273         inode_unlock(inode);
3274         free_xid(xid);
3275         if (rc)
3276                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3277                               ses->Suid, offset, len, rc);
3278         else
3279                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3280                               ses->Suid, offset, len);
3281         return rc;
3282 }
3283
3284 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3285                             loff_t offset, loff_t len)
3286 {
3287         struct inode *inode = file_inode(file);
3288         struct cifsFileInfo *cfile = file->private_data;
3289         struct file_zero_data_information fsctl_buf;
3290         long rc;
3291         unsigned int xid;
3292         __u8 set_sparse = 1;
3293
3294         xid = get_xid();
3295
3296         inode_lock(inode);
3297         /* Need to make file sparse, if not already, before freeing range. */
3298         /* Consider adding equivalent for compressed since it could also work */
3299         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3300                 rc = -EOPNOTSUPP;
3301                 goto out;
3302         }
3303
3304         filemap_invalidate_lock(inode->i_mapping);
3305         /*
3306          * We implement the punch hole through ioctl, so we need remove the page
3307          * caches first, otherwise the data may be inconsistent with the server.
3308          */
3309         truncate_pagecache_range(inode, offset, offset + len - 1);
3310
3311         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3312
3313         fsctl_buf.FileOffset = cpu_to_le64(offset);
3314         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3315
3316         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3317                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3318                         (char *)&fsctl_buf,
3319                         sizeof(struct file_zero_data_information),
3320                         CIFSMaxBufSize, NULL, NULL);
3321         filemap_invalidate_unlock(inode->i_mapping);
3322 out:
3323         inode_unlock(inode);
3324         free_xid(xid);
3325         return rc;
3326 }
3327
3328 static int smb3_simple_fallocate_write_range(unsigned int xid,
3329                                              struct cifs_tcon *tcon,
3330                                              struct cifsFileInfo *cfile,
3331                                              loff_t off, loff_t len,
3332                                              char *buf)
3333 {
3334         struct cifs_io_parms io_parms = {0};
3335         int nbytes;
3336         int rc = 0;
3337         struct kvec iov[2];
3338
3339         io_parms.netfid = cfile->fid.netfid;
3340         io_parms.pid = current->tgid;
3341         io_parms.tcon = tcon;
3342         io_parms.persistent_fid = cfile->fid.persistent_fid;
3343         io_parms.volatile_fid = cfile->fid.volatile_fid;
3344
3345         while (len) {
3346                 io_parms.offset = off;
3347                 io_parms.length = len;
3348                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3349                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3350                 /* iov[0] is reserved for smb header */
3351                 iov[1].iov_base = buf;
3352                 iov[1].iov_len = io_parms.length;
3353                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3354                 if (rc)
3355                         break;
3356                 if (nbytes > len)
3357                         return -EINVAL;
3358                 buf += nbytes;
3359                 off += nbytes;
3360                 len -= nbytes;
3361         }
3362         return rc;
3363 }
3364
3365 static int smb3_simple_fallocate_range(unsigned int xid,
3366                                        struct cifs_tcon *tcon,
3367                                        struct cifsFileInfo *cfile,
3368                                        loff_t off, loff_t len)
3369 {
3370         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3371         u32 out_data_len;
3372         char *buf = NULL;
3373         loff_t l;
3374         int rc;
3375
3376         in_data.file_offset = cpu_to_le64(off);
3377         in_data.length = cpu_to_le64(len);
3378         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3379                         cfile->fid.volatile_fid,
3380                         FSCTL_QUERY_ALLOCATED_RANGES,
3381                         (char *)&in_data, sizeof(in_data),
3382                         1024 * sizeof(struct file_allocated_range_buffer),
3383                         (char **)&out_data, &out_data_len);
3384         if (rc)
3385                 goto out;
3386
3387         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3388         if (buf == NULL) {
3389                 rc = -ENOMEM;
3390                 goto out;
3391         }
3392
3393         tmp_data = out_data;
3394         while (len) {
3395                 /*
3396                  * The rest of the region is unmapped so write it all.
3397                  */
3398                 if (out_data_len == 0) {
3399                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3400                                                cfile, off, len, buf);
3401                         goto out;
3402                 }
3403
3404                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3405                         rc = -EINVAL;
3406                         goto out;
3407                 }
3408
3409                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3410                         /*
3411                          * We are at a hole. Write until the end of the region
3412                          * or until the next allocated data,
3413                          * whichever comes next.
3414                          */
3415                         l = le64_to_cpu(tmp_data->file_offset) - off;
3416                         if (len < l)
3417                                 l = len;
3418                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3419                                                cfile, off, l, buf);
3420                         if (rc)
3421                                 goto out;
3422                         off = off + l;
3423                         len = len - l;
3424                         if (len == 0)
3425                                 goto out;
3426                 }
3427                 /*
3428                  * We are at a section of allocated data, just skip forward
3429                  * until the end of the data or the end of the region
3430                  * we are supposed to fallocate, whichever comes first.
3431                  */
3432                 l = le64_to_cpu(tmp_data->length);
3433                 if (len < l)
3434                         l = len;
3435                 off += l;
3436                 len -= l;
3437
3438                 tmp_data = &tmp_data[1];
3439                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3440         }
3441
3442  out:
3443         kfree(out_data);
3444         kfree(buf);
3445         return rc;
3446 }
3447
3448
3449 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3450                             loff_t off, loff_t len, bool keep_size)
3451 {
3452         struct inode *inode;
3453         struct cifsInodeInfo *cifsi;
3454         struct cifsFileInfo *cfile = file->private_data;
3455         long rc = -EOPNOTSUPP;
3456         unsigned int xid;
3457         loff_t new_eof;
3458
3459         xid = get_xid();
3460
3461         inode = d_inode(cfile->dentry);
3462         cifsi = CIFS_I(inode);
3463
3464         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3465                                 tcon->ses->Suid, off, len);
3466         /* if file not oplocked can't be sure whether asking to extend size */
3467         if (!CIFS_CACHE_READ(cifsi))
3468                 if (keep_size == false) {
3469                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3470                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3471                         free_xid(xid);
3472                         return rc;
3473                 }
3474
3475         /*
3476          * Extending the file
3477          */
3478         if ((keep_size == false) && i_size_read(inode) < off + len) {
3479                 rc = inode_newsize_ok(inode, off + len);
3480                 if (rc)
3481                         goto out;
3482
3483                 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3484                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3485
3486                 new_eof = off + len;
3487                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3488                                   cfile->fid.volatile_fid, cfile->pid, new_eof);
3489                 if (rc == 0) {
3490                         netfs_resize_file(&cifsi->netfs, new_eof, true);
3491                         cifs_setsize(inode, new_eof);
3492                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3493                         truncate_setsize(inode, new_eof);
3494                 }
3495                 goto out;
3496         }
3497
3498         /*
3499          * Files are non-sparse by default so falloc may be a no-op
3500          * Must check if file sparse. If not sparse, and since we are not
3501          * extending then no need to do anything since file already allocated
3502          */
3503         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3504                 rc = 0;
3505                 goto out;
3506         }
3507
3508         if (keep_size == true) {
3509                 /*
3510                  * We can not preallocate pages beyond the end of the file
3511                  * in SMB2
3512                  */
3513                 if (off >= i_size_read(inode)) {
3514                         rc = 0;
3515                         goto out;
3516                 }
3517                 /*
3518                  * For fallocates that are partially beyond the end of file,
3519                  * clamp len so we only fallocate up to the end of file.
3520                  */
3521                 if (off + len > i_size_read(inode)) {
3522                         len = i_size_read(inode) - off;
3523                 }
3524         }
3525
3526         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3527                 /*
3528                  * At this point, we are trying to fallocate an internal
3529                  * regions of a sparse file. Since smb2 does not have a
3530                  * fallocate command we have two otions on how to emulate this.
3531                  * We can either turn the entire file to become non-sparse
3532                  * which we only do if the fallocate is for virtually
3533                  * the whole file,  or we can overwrite the region with zeroes
3534                  * using SMB2_write, which could be prohibitevly expensive
3535                  * if len is large.
3536                  */
3537                 /*
3538                  * We are only trying to fallocate a small region so
3539                  * just write it with zero.
3540                  */
3541                 if (len <= 1024 * 1024) {
3542                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3543                                                          off, len);
3544                         goto out;
3545                 }
3546
3547                 /*
3548                  * Check if falloc starts within first few pages of file
3549                  * and ends within a few pages of the end of file to
3550                  * ensure that most of file is being forced to be
3551                  * fallocated now. If so then setting whole file sparse
3552                  * ie potentially making a few extra pages at the beginning
3553                  * or end of the file non-sparse via set_sparse is harmless.
3554                  */
3555                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3556                         rc = -EOPNOTSUPP;
3557                         goto out;
3558                 }
3559         }
3560
3561         smb2_set_sparse(xid, tcon, cfile, inode, false);
3562         rc = 0;
3563
3564 out:
3565         if (rc)
3566                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3567                                 tcon->ses->Suid, off, len, rc);
3568         else
3569                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3570                                 tcon->ses->Suid, off, len);
3571
3572         free_xid(xid);
3573         return rc;
3574 }
3575
3576 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3577                             loff_t off, loff_t len)
3578 {
3579         int rc;
3580         unsigned int xid;
3581         struct inode *inode = file_inode(file);
3582         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3583         struct cifsFileInfo *cfile = file->private_data;
3584         struct netfs_inode *ictx = &cifsi->netfs;
3585         loff_t old_eof, new_eof;
3586
3587         xid = get_xid();
3588
3589         inode_lock(inode);
3590
3591         old_eof = i_size_read(inode);
3592         if ((off >= old_eof) ||
3593             off + len >= old_eof) {
3594                 rc = -EINVAL;
3595                 goto out;
3596         }
3597
3598         filemap_invalidate_lock(inode->i_mapping);
3599         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3600         if (rc < 0)
3601                 goto out_2;
3602
3603         truncate_pagecache_range(inode, off, old_eof);
3604         ictx->zero_point = old_eof;
3605
3606         rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3607                                   old_eof - off - len, off);
3608         if (rc < 0)
3609                 goto out_2;
3610
3611         new_eof = old_eof - len;
3612         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3613                           cfile->fid.volatile_fid, cfile->pid, new_eof);
3614         if (rc < 0)
3615                 goto out_2;
3616
3617         rc = 0;
3618
3619         truncate_setsize(inode, new_eof);
3620         netfs_resize_file(&cifsi->netfs, new_eof, true);
3621         ictx->zero_point = new_eof;
3622         fscache_resize_cookie(cifs_inode_cookie(inode), new_eof);
3623 out_2:
3624         filemap_invalidate_unlock(inode->i_mapping);
3625  out:
3626         inode_unlock(inode);
3627         free_xid(xid);
3628         return rc;
3629 }
3630
3631 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3632                               loff_t off, loff_t len)
3633 {
3634         int rc;
3635         unsigned int xid;
3636         struct cifsFileInfo *cfile = file->private_data;
3637         struct inode *inode = file_inode(file);
3638         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3639         __u64 count, old_eof, new_eof;
3640
3641         xid = get_xid();
3642
3643         inode_lock(inode);
3644
3645         old_eof = i_size_read(inode);
3646         if (off >= old_eof) {
3647                 rc = -EINVAL;
3648                 goto out;
3649         }
3650
3651         count = old_eof - off;
3652         new_eof = old_eof + len;
3653
3654         filemap_invalidate_lock(inode->i_mapping);
3655         rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1);
3656         if (rc < 0)
3657                 goto out_2;
3658         truncate_pagecache_range(inode, off, old_eof);
3659
3660         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3661                           cfile->fid.volatile_fid, cfile->pid, new_eof);
3662         if (rc < 0)
3663                 goto out_2;
3664
3665         truncate_setsize(inode, new_eof);
3666         netfs_resize_file(&cifsi->netfs, i_size_read(inode), true);
3667         fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode));
3668
3669         rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3670         if (rc < 0)
3671                 goto out_2;
3672         cifsi->netfs.zero_point = new_eof;
3673
3674         rc = smb3_zero_data(file, tcon, off, len, xid);
3675         if (rc < 0)
3676                 goto out_2;
3677
3678         rc = 0;
3679 out_2:
3680         filemap_invalidate_unlock(inode->i_mapping);
3681  out:
3682         inode_unlock(inode);
3683         free_xid(xid);
3684         return rc;
3685 }
3686
3687 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3688 {
3689         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3690         struct cifsInodeInfo *cifsi;
3691         struct inode *inode;
3692         int rc = 0;
3693         struct file_allocated_range_buffer in_data, *out_data = NULL;
3694         u32 out_data_len;
3695         unsigned int xid;
3696
3697         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3698                 return generic_file_llseek(file, offset, whence);
3699
3700         inode = d_inode(cfile->dentry);
3701         cifsi = CIFS_I(inode);
3702
3703         if (offset < 0 || offset >= i_size_read(inode))
3704                 return -ENXIO;
3705
3706         xid = get_xid();
3707         /*
3708          * We need to be sure that all dirty pages are written as they
3709          * might fill holes on the server.
3710          * Note that we also MUST flush any written pages since at least
3711          * some servers (Windows2016) will not reflect recent writes in
3712          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3713          */
3714         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3715         if (wrcfile) {
3716                 filemap_write_and_wait(inode->i_mapping);
3717                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3718                 cifsFileInfo_put(wrcfile);
3719         }
3720
3721         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3722                 if (whence == SEEK_HOLE)
3723                         offset = i_size_read(inode);
3724                 goto lseek_exit;
3725         }
3726
3727         in_data.file_offset = cpu_to_le64(offset);
3728         in_data.length = cpu_to_le64(i_size_read(inode));
3729
3730         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3731                         cfile->fid.volatile_fid,
3732                         FSCTL_QUERY_ALLOCATED_RANGES,
3733                         (char *)&in_data, sizeof(in_data),
3734                         sizeof(struct file_allocated_range_buffer),
3735                         (char **)&out_data, &out_data_len);
3736         if (rc == -E2BIG)
3737                 rc = 0;
3738         if (rc)
3739                 goto lseek_exit;
3740
3741         if (whence == SEEK_HOLE && out_data_len == 0)
3742                 goto lseek_exit;
3743
3744         if (whence == SEEK_DATA && out_data_len == 0) {
3745                 rc = -ENXIO;
3746                 goto lseek_exit;
3747         }
3748
3749         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3750                 rc = -EINVAL;
3751                 goto lseek_exit;
3752         }
3753         if (whence == SEEK_DATA) {
3754                 offset = le64_to_cpu(out_data->file_offset);
3755                 goto lseek_exit;
3756         }
3757         if (offset < le64_to_cpu(out_data->file_offset))
3758                 goto lseek_exit;
3759
3760         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3761
3762  lseek_exit:
3763         free_xid(xid);
3764         kfree(out_data);
3765         if (!rc)
3766                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3767         else
3768                 return rc;
3769 }
3770
3771 static int smb3_fiemap(struct cifs_tcon *tcon,
3772                        struct cifsFileInfo *cfile,
3773                        struct fiemap_extent_info *fei, u64 start, u64 len)
3774 {
3775         unsigned int xid;
3776         struct file_allocated_range_buffer in_data, *out_data;
3777         u32 out_data_len;
3778         int i, num, rc, flags, last_blob;
3779         u64 next;
3780
3781         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3782         if (rc)
3783                 return rc;
3784
3785         xid = get_xid();
3786  again:
3787         in_data.file_offset = cpu_to_le64(start);
3788         in_data.length = cpu_to_le64(len);
3789
3790         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3791                         cfile->fid.volatile_fid,
3792                         FSCTL_QUERY_ALLOCATED_RANGES,
3793                         (char *)&in_data, sizeof(in_data),
3794                         1024 * sizeof(struct file_allocated_range_buffer),
3795                         (char **)&out_data, &out_data_len);
3796         if (rc == -E2BIG) {
3797                 last_blob = 0;
3798                 rc = 0;
3799         } else
3800                 last_blob = 1;
3801         if (rc)
3802                 goto out;
3803
3804         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3805                 rc = -EINVAL;
3806                 goto out;
3807         }
3808         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3809                 rc = -EINVAL;
3810                 goto out;
3811         }
3812
3813         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3814         for (i = 0; i < num; i++) {
3815                 flags = 0;
3816                 if (i == num - 1 && last_blob)
3817                         flags |= FIEMAP_EXTENT_LAST;
3818
3819                 rc = fiemap_fill_next_extent(fei,
3820                                 le64_to_cpu(out_data[i].file_offset),
3821                                 le64_to_cpu(out_data[i].file_offset),
3822                                 le64_to_cpu(out_data[i].length),
3823                                 flags);
3824                 if (rc < 0)
3825                         goto out;
3826                 if (rc == 1) {
3827                         rc = 0;
3828                         goto out;
3829                 }
3830         }
3831
3832         if (!last_blob) {
3833                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3834                   le64_to_cpu(out_data[num - 1].length);
3835                 len = len - (next - start);
3836                 start = next;
3837                 goto again;
3838         }
3839
3840  out:
3841         free_xid(xid);
3842         kfree(out_data);
3843         return rc;
3844 }
3845
3846 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3847                            loff_t off, loff_t len)
3848 {
3849         /* KEEP_SIZE already checked for by do_fallocate */
3850         if (mode & FALLOC_FL_PUNCH_HOLE)
3851                 return smb3_punch_hole(file, tcon, off, len);
3852         else if (mode & FALLOC_FL_ZERO_RANGE) {
3853                 if (mode & FALLOC_FL_KEEP_SIZE)
3854                         return smb3_zero_range(file, tcon, off, len, true);
3855                 return smb3_zero_range(file, tcon, off, len, false);
3856         } else if (mode == FALLOC_FL_KEEP_SIZE)
3857                 return smb3_simple_falloc(file, tcon, off, len, true);
3858         else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3859                 return smb3_collapse_range(file, tcon, off, len);
3860         else if (mode == FALLOC_FL_INSERT_RANGE)
3861                 return smb3_insert_range(file, tcon, off, len);
3862         else if (mode == 0)
3863                 return smb3_simple_falloc(file, tcon, off, len, false);
3864
3865         return -EOPNOTSUPP;
3866 }
3867
3868 static void
3869 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3870                       struct cifsInodeInfo *cinode, __u32 oplock,
3871                       unsigned int epoch, bool *purge_cache)
3872 {
3873         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3874 }
3875
3876 static void
3877 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3878                        unsigned int epoch, bool *purge_cache);
3879
3880 static void
3881 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3882                        struct cifsInodeInfo *cinode, __u32 oplock,
3883                        unsigned int epoch, bool *purge_cache)
3884 {
3885         unsigned int old_state = cinode->oplock;
3886         unsigned int old_epoch = cinode->epoch;
3887         unsigned int new_state;
3888
3889         if (epoch > old_epoch) {
3890                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3891                 cinode->epoch = epoch;
3892         }
3893
3894         new_state = cinode->oplock;
3895         *purge_cache = false;
3896
3897         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3898             (new_state & CIFS_CACHE_READ_FLG) == 0)
3899                 *purge_cache = true;
3900         else if (old_state == new_state && (epoch - old_epoch > 1))
3901                 *purge_cache = true;
3902 }
3903
3904 static void
3905 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3906                       unsigned int epoch, bool *purge_cache)
3907 {
3908         oplock &= 0xFF;
3909         cinode->lease_granted = false;
3910         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3911                 return;
3912         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3913                 cinode->oplock = CIFS_CACHE_RHW_FLG;
3914                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3915                          &cinode->netfs.inode);
3916         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3917                 cinode->oplock = CIFS_CACHE_RW_FLG;
3918                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3919                          &cinode->netfs.inode);
3920         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3921                 cinode->oplock = CIFS_CACHE_READ_FLG;
3922                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3923                          &cinode->netfs.inode);
3924         } else
3925                 cinode->oplock = 0;
3926 }
3927
3928 static void
3929 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3930                        unsigned int epoch, bool *purge_cache)
3931 {
3932         char message[5] = {0};
3933         unsigned int new_oplock = 0;
3934
3935         oplock &= 0xFF;
3936         cinode->lease_granted = true;
3937         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3938                 return;
3939
3940         /* Check if the server granted an oplock rather than a lease */
3941         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3942                 return smb2_set_oplock_level(cinode, oplock, epoch,
3943                                              purge_cache);
3944
3945         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3946                 new_oplock |= CIFS_CACHE_READ_FLG;
3947                 strcat(message, "R");
3948         }
3949         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3950                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3951                 strcat(message, "H");
3952         }
3953         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3954                 new_oplock |= CIFS_CACHE_WRITE_FLG;
3955                 strcat(message, "W");
3956         }
3957         if (!new_oplock)
3958                 strscpy(message, "None");
3959
3960         cinode->oplock = new_oplock;
3961         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3962                  &cinode->netfs.inode);
3963 }
3964
3965 static void
3966 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3967                       unsigned int epoch, bool *purge_cache)
3968 {
3969         unsigned int old_oplock = cinode->oplock;
3970
3971         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3972
3973         if (purge_cache) {
3974                 *purge_cache = false;
3975                 if (old_oplock == CIFS_CACHE_READ_FLG) {
3976                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
3977                             (epoch - cinode->epoch > 0))
3978                                 *purge_cache = true;
3979                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3980                                  (epoch - cinode->epoch > 1))
3981                                 *purge_cache = true;
3982                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3983                                  (epoch - cinode->epoch > 1))
3984                                 *purge_cache = true;
3985                         else if (cinode->oplock == 0 &&
3986                                  (epoch - cinode->epoch > 0))
3987                                 *purge_cache = true;
3988                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
3989                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3990                             (epoch - cinode->epoch > 0))
3991                                 *purge_cache = true;
3992                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3993                                  (epoch - cinode->epoch > 1))
3994                                 *purge_cache = true;
3995                 }
3996                 cinode->epoch = epoch;
3997         }
3998 }
3999
4000 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4001 static bool
4002 smb2_is_read_op(__u32 oplock)
4003 {
4004         return oplock == SMB2_OPLOCK_LEVEL_II;
4005 }
4006 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4007
4008 static bool
4009 smb21_is_read_op(__u32 oplock)
4010 {
4011         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4012                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4013 }
4014
4015 static __le32
4016 map_oplock_to_lease(u8 oplock)
4017 {
4018         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4019                 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4020         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4021                 return SMB2_LEASE_READ_CACHING_LE;
4022         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4023                 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4024                        SMB2_LEASE_WRITE_CACHING_LE;
4025         return 0;
4026 }
4027
4028 static char *
4029 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4030 {
4031         struct create_lease *buf;
4032
4033         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4034         if (!buf)
4035                 return NULL;
4036
4037         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4038         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4039
4040         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4041                                         (struct create_lease, lcontext));
4042         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4043         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4044                                 (struct create_lease, Name));
4045         buf->ccontext.NameLength = cpu_to_le16(4);
4046         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4047         buf->Name[0] = 'R';
4048         buf->Name[1] = 'q';
4049         buf->Name[2] = 'L';
4050         buf->Name[3] = 's';
4051         return (char *)buf;
4052 }
4053
4054 static char *
4055 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4056 {
4057         struct create_lease_v2 *buf;
4058
4059         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4060         if (!buf)
4061                 return NULL;
4062
4063         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4064         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4065
4066         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4067                                         (struct create_lease_v2, lcontext));
4068         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4069         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4070                                 (struct create_lease_v2, Name));
4071         buf->ccontext.NameLength = cpu_to_le16(4);
4072         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4073         buf->Name[0] = 'R';
4074         buf->Name[1] = 'q';
4075         buf->Name[2] = 'L';
4076         buf->Name[3] = 's';
4077         return (char *)buf;
4078 }
4079
4080 static __u8
4081 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4082 {
4083         struct create_lease *lc = (struct create_lease *)buf;
4084
4085         *epoch = 0; /* not used */
4086         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4087                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4088         return le32_to_cpu(lc->lcontext.LeaseState);
4089 }
4090
4091 static __u8
4092 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4093 {
4094         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4095
4096         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4097         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4098                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4099         if (lease_key)
4100                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4101         return le32_to_cpu(lc->lcontext.LeaseState);
4102 }
4103
4104 static unsigned int
4105 smb2_wp_retry_size(struct inode *inode)
4106 {
4107         return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4108                      SMB2_MAX_BUFFER_SIZE);
4109 }
4110
4111 static bool
4112 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4113 {
4114         return !cfile->invalidHandle;
4115 }
4116
4117 static void
4118 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4119                    struct smb_rqst *old_rq, __le16 cipher_type)
4120 {
4121         struct smb2_hdr *shdr =
4122                         (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4123
4124         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4125         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4126         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4127         tr_hdr->Flags = cpu_to_le16(0x01);
4128         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4129             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4130                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4131         else
4132                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4133         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4134 }
4135
4136 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4137                                  int num_rqst, const u8 *sig, u8 **iv,
4138                                  struct aead_request **req, struct sg_table *sgt,
4139                                  unsigned int *num_sgs, size_t *sensitive_size)
4140 {
4141         unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4142         unsigned int iv_size = crypto_aead_ivsize(tfm);
4143         unsigned int len;
4144         u8 *p;
4145
4146         *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4147         if (IS_ERR_VALUE((long)(int)*num_sgs))
4148                 return ERR_PTR(*num_sgs);
4149
4150         len = iv_size;
4151         len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4152         len = ALIGN(len, crypto_tfm_ctx_alignment());
4153         len += req_size;
4154         len = ALIGN(len, __alignof__(struct scatterlist));
4155         len += array_size(*num_sgs, sizeof(struct scatterlist));
4156         *sensitive_size = len;
4157
4158         p = kvzalloc(len, GFP_NOFS);
4159         if (!p)
4160                 return ERR_PTR(-ENOMEM);
4161
4162         *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4163         *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4164                                                 crypto_tfm_ctx_alignment());
4165         sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4166                                                    __alignof__(struct scatterlist));
4167         return p;
4168 }
4169
4170 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4171                                int num_rqst, const u8 *sig, u8 **iv,
4172                                struct aead_request **req, struct scatterlist **sgl,
4173                                size_t *sensitive_size)
4174 {
4175         struct sg_table sgtable = {};
4176         unsigned int skip, num_sgs, i, j;
4177         ssize_t rc;
4178         void *p;
4179
4180         p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4181                                 &num_sgs, sensitive_size);
4182         if (IS_ERR(p))
4183                 return ERR_CAST(p);
4184
4185         sg_init_marker(sgtable.sgl, num_sgs);
4186
4187         /*
4188          * The first rqst has a transform header where the
4189          * first 20 bytes are not part of the encrypted blob.
4190          */
4191         skip = 20;
4192
4193         for (i = 0; i < num_rqst; i++) {
4194                 struct iov_iter *iter = &rqst[i].rq_iter;
4195                 size_t count = iov_iter_count(iter);
4196
4197                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4198                         cifs_sg_set_buf(&sgtable,
4199                                         rqst[i].rq_iov[j].iov_base + skip,
4200                                         rqst[i].rq_iov[j].iov_len - skip);
4201
4202                         /* See the above comment on the 'skip' assignment */
4203                         skip = 0;
4204                 }
4205                 sgtable.orig_nents = sgtable.nents;
4206
4207                 rc = extract_iter_to_sg(iter, count, &sgtable,
4208                                         num_sgs - sgtable.nents, 0);
4209                 iov_iter_revert(iter, rc);
4210                 sgtable.orig_nents = sgtable.nents;
4211         }
4212
4213         cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4214         sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4215         *sgl = sgtable.sgl;
4216         return p;
4217 }
4218
4219 static int
4220 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4221 {
4222         struct TCP_Server_Info *pserver;
4223         struct cifs_ses *ses;
4224         u8 *ses_enc_key;
4225
4226         /* If server is a channel, select the primary channel */
4227         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
4228
4229         spin_lock(&cifs_tcp_ses_lock);
4230         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4231                 if (ses->Suid == ses_id) {
4232                         spin_lock(&ses->ses_lock);
4233                         ses_enc_key = enc ? ses->smb3encryptionkey :
4234                                 ses->smb3decryptionkey;
4235                         memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4236                         spin_unlock(&ses->ses_lock);
4237                         spin_unlock(&cifs_tcp_ses_lock);
4238                         return 0;
4239                 }
4240         }
4241         spin_unlock(&cifs_tcp_ses_lock);
4242
4243         trace_smb3_ses_not_found(ses_id);
4244
4245         return -EAGAIN;
4246 }
4247 /*
4248  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4249  * iov[0]   - transform header (associate data),
4250  * iov[1-N] - SMB2 header and pages - data to encrypt.
4251  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4252  * untouched.
4253  */
4254 static int
4255 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4256               struct smb_rqst *rqst, int enc)
4257 {
4258         struct smb2_transform_hdr *tr_hdr =
4259                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4260         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4261         int rc = 0;
4262         struct scatterlist *sg;
4263         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4264         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4265         struct aead_request *req;
4266         u8 *iv;
4267         DECLARE_CRYPTO_WAIT(wait);
4268         struct crypto_aead *tfm;
4269         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4270         void *creq;
4271         size_t sensitive_size;
4272
4273         rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4274         if (rc) {
4275                 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,
4276                          enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));
4277                 return rc;
4278         }
4279
4280         rc = smb3_crypto_aead_allocate(server);
4281         if (rc) {
4282                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4283                 return rc;
4284         }
4285
4286         tfm = enc ? server->secmech.enc : server->secmech.dec;
4287
4288         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4289                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4290                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4291         else
4292                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4293
4294         if (rc) {
4295                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4296                 return rc;
4297         }
4298
4299         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4300         if (rc) {
4301                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4302                 return rc;
4303         }
4304
4305         creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4306                                  &sensitive_size);
4307         if (IS_ERR(creq))
4308                 return PTR_ERR(creq);
4309
4310         if (!enc) {
4311                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4312                 crypt_len += SMB2_SIGNATURE_SIZE;
4313         }
4314
4315         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4316             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4317                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4318         else {
4319                 iv[0] = 3;
4320                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4321         }
4322
4323         aead_request_set_tfm(req, tfm);
4324         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4325         aead_request_set_ad(req, assoc_data_len);
4326
4327         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4328                                   crypto_req_done, &wait);
4329
4330         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4331                                 : crypto_aead_decrypt(req), &wait);
4332
4333         if (!rc && enc)
4334                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4335
4336         kvfree_sensitive(creq, sensitive_size);
4337         return rc;
4338 }
4339
4340 /*
4341  * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4342  */
4343 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4344 {
4345         struct folio *folio;
4346
4347         XA_STATE(xas, buffer, 0);
4348
4349         rcu_read_lock();
4350         xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4351                 folio_put(folio);
4352         }
4353         rcu_read_unlock();
4354         xa_destroy(buffer);
4355 }
4356
4357 void
4358 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4359 {
4360         int i;
4361
4362         for (i = 0; i < num_rqst; i++)
4363                 if (!xa_empty(&rqst[i].rq_buffer))
4364                         cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4365 }
4366
4367 /*
4368  * This function will initialize new_rq and encrypt the content.
4369  * The first entry, new_rq[0], only contains a single iov which contains
4370  * a smb2_transform_hdr and is pre-allocated by the caller.
4371  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4372  *
4373  * The end result is an array of smb_rqst structures where the first structure
4374  * only contains a single iov for the transform header which we then can pass
4375  * to crypt_message().
4376  *
4377  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4378  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4379  */
4380 static int
4381 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4382                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4383 {
4384         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4385         struct page *page;
4386         unsigned int orig_len = 0;
4387         int i, j;
4388         int rc = -ENOMEM;
4389
4390         for (i = 1; i < num_rqst; i++) {
4391                 struct smb_rqst *old = &old_rq[i - 1];
4392                 struct smb_rqst *new = &new_rq[i];
4393                 struct xarray *buffer = &new->rq_buffer;
4394                 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4395
4396                 orig_len += smb_rqst_len(server, old);
4397                 new->rq_iov = old->rq_iov;
4398                 new->rq_nvec = old->rq_nvec;
4399
4400                 xa_init(buffer);
4401
4402                 if (size > 0) {
4403                         unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4404
4405                         for (j = 0; j < npages; j++) {
4406                                 void *o;
4407
4408                                 rc = -ENOMEM;
4409                                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4410                                 if (!page)
4411                                         goto err_free;
4412                                 page->index = j;
4413                                 o = xa_store(buffer, j, page, GFP_KERNEL);
4414                                 if (xa_is_err(o)) {
4415                                         rc = xa_err(o);
4416                                         put_page(page);
4417                                         goto err_free;
4418                                 }
4419
4420                                 xa_set_mark(buffer, j, XA_MARK_0);
4421
4422                                 seg = min_t(size_t, size - copied, PAGE_SIZE);
4423                                 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4424                                         rc = -EFAULT;
4425                                         goto err_free;
4426                                 }
4427                                 copied += seg;
4428                         }
4429                         iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4430                                         buffer, 0, size);
4431                         new->rq_iter_size = size;
4432                 }
4433         }
4434
4435         /* fill the 1st iov with a transform header */
4436         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4437
4438         rc = crypt_message(server, num_rqst, new_rq, 1);
4439         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4440         if (rc)
4441                 goto err_free;
4442
4443         return rc;
4444
4445 err_free:
4446         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4447         return rc;
4448 }
4449
4450 static int
4451 smb3_is_transform_hdr(void *buf)
4452 {
4453         struct smb2_transform_hdr *trhdr = buf;
4454
4455         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4456 }
4457
4458 static int
4459 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4460                  unsigned int buf_data_size, struct iov_iter *iter,
4461                  bool is_offloaded)
4462 {
4463         struct kvec iov[2];
4464         struct smb_rqst rqst = {NULL};
4465         size_t iter_size = 0;
4466         int rc;
4467
4468         iov[0].iov_base = buf;
4469         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4470         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4471         iov[1].iov_len = buf_data_size;
4472
4473         rqst.rq_iov = iov;
4474         rqst.rq_nvec = 2;
4475         if (iter) {
4476                 rqst.rq_iter = *iter;
4477                 rqst.rq_iter_size = iov_iter_count(iter);
4478                 iter_size = iov_iter_count(iter);
4479         }
4480
4481         rc = crypt_message(server, 1, &rqst, 0);
4482         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4483
4484         if (rc)
4485                 return rc;
4486
4487         memmove(buf, iov[1].iov_base, buf_data_size);
4488
4489         if (!is_offloaded)
4490                 server->total_read = buf_data_size + iter_size;
4491
4492         return rc;
4493 }
4494
4495 static int
4496 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4497                         unsigned int skip, struct iov_iter *iter)
4498 {
4499         struct page *page;
4500         unsigned long index;
4501
4502         xa_for_each(pages, index, page) {
4503                 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4504
4505                 n = copy_page_to_iter(page, skip, len, iter);
4506                 if (n != len) {
4507                         cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4508                         return -EIO;
4509                 }
4510                 data_size -= n;
4511                 skip = 0;
4512         }
4513
4514         return 0;
4515 }
4516
4517 static int
4518 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4519                  char *buf, unsigned int buf_len, struct xarray *pages,
4520                  unsigned int pages_len, bool is_offloaded)
4521 {
4522         unsigned int data_offset;
4523         unsigned int data_len;
4524         unsigned int cur_off;
4525         unsigned int cur_page_idx;
4526         unsigned int pad_len;
4527         struct cifs_io_subrequest *rdata = mid->callback_data;
4528         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4529         int length;
4530         bool use_rdma_mr = false;
4531
4532         if (shdr->Command != SMB2_READ) {
4533                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4534                 return -EOPNOTSUPP;
4535         }
4536
4537         if (server->ops->is_session_expired &&
4538             server->ops->is_session_expired(buf)) {
4539                 if (!is_offloaded)
4540                         cifs_reconnect(server, true);
4541                 return -1;
4542         }
4543
4544         if (server->ops->is_status_pending &&
4545                         server->ops->is_status_pending(buf, server))
4546                 return -1;
4547
4548         /* set up first two iov to get credits */
4549         rdata->iov[0].iov_base = buf;
4550         rdata->iov[0].iov_len = 0;
4551         rdata->iov[1].iov_base = buf;
4552         rdata->iov[1].iov_len =
4553                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4554         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4555                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4556         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4557                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4558
4559         rdata->result = server->ops->map_error(buf, true);
4560         if (rdata->result != 0) {
4561                 cifs_dbg(FYI, "%s: server returned error %d\n",
4562                          __func__, rdata->result);
4563                 /* normal error on read response */
4564                 if (is_offloaded)
4565                         mid->mid_state = MID_RESPONSE_RECEIVED;
4566                 else
4567                         dequeue_mid(mid, false);
4568                 return 0;
4569         }
4570
4571         data_offset = server->ops->read_data_offset(buf);
4572 #ifdef CONFIG_CIFS_SMB_DIRECT
4573         use_rdma_mr = rdata->mr;
4574 #endif
4575         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4576
4577         if (data_offset < server->vals->read_rsp_size) {
4578                 /*
4579                  * win2k8 sometimes sends an offset of 0 when the read
4580                  * is beyond the EOF. Treat it as if the data starts just after
4581                  * the header.
4582                  */
4583                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4584                          __func__, data_offset);
4585                 data_offset = server->vals->read_rsp_size;
4586         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4587                 /* data_offset is beyond the end of smallbuf */
4588                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4589                          __func__, data_offset);
4590                 rdata->result = -EIO;
4591                 if (is_offloaded)
4592                         mid->mid_state = MID_RESPONSE_MALFORMED;
4593                 else
4594                         dequeue_mid(mid, rdata->result);
4595                 return 0;
4596         }
4597
4598         pad_len = data_offset - server->vals->read_rsp_size;
4599
4600         if (buf_len <= data_offset) {
4601                 /* read response payload is in pages */
4602                 cur_page_idx = pad_len / PAGE_SIZE;
4603                 cur_off = pad_len % PAGE_SIZE;
4604
4605                 if (cur_page_idx != 0) {
4606                         /* data offset is beyond the 1st page of response */
4607                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4608                                  __func__, data_offset);
4609                         rdata->result = -EIO;
4610                         if (is_offloaded)
4611                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4612                         else
4613                                 dequeue_mid(mid, rdata->result);
4614                         return 0;
4615                 }
4616
4617                 if (data_len > pages_len - pad_len) {
4618                         /* data_len is corrupt -- discard frame */
4619                         rdata->result = -EIO;
4620                         if (is_offloaded)
4621                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4622                         else
4623                                 dequeue_mid(mid, rdata->result);
4624                         return 0;
4625                 }
4626
4627                 /* Copy the data to the output I/O iterator. */
4628                 rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4629                                                         cur_off, &rdata->subreq.io_iter);
4630                 if (rdata->result != 0) {
4631                         if (is_offloaded)
4632                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4633                         else
4634                                 dequeue_mid(mid, rdata->result);
4635                         return 0;
4636                 }
4637                 rdata->got_bytes = pages_len;
4638
4639         } else if (buf_len >= data_offset + data_len) {
4640                 /* read response payload is in buf */
4641                 WARN_ONCE(pages && !xa_empty(pages),
4642                           "read data can be either in buf or in pages");
4643                 length = copy_to_iter(buf + data_offset, data_len, &rdata->subreq.io_iter);
4644                 if (length < 0)
4645                         return length;
4646                 rdata->got_bytes = data_len;
4647         } else {
4648                 /* read response payload cannot be in both buf and pages */
4649                 WARN_ONCE(1, "buf can not contain only a part of read data");
4650                 rdata->result = -EIO;
4651                 if (is_offloaded)
4652                         mid->mid_state = MID_RESPONSE_MALFORMED;
4653                 else
4654                         dequeue_mid(mid, rdata->result);
4655                 return 0;
4656         }
4657
4658         if (is_offloaded)
4659                 mid->mid_state = MID_RESPONSE_RECEIVED;
4660         else
4661                 dequeue_mid(mid, false);
4662         return 0;
4663 }
4664
4665 struct smb2_decrypt_work {
4666         struct work_struct decrypt;
4667         struct TCP_Server_Info *server;
4668         struct xarray buffer;
4669         char *buf;
4670         unsigned int len;
4671 };
4672
4673
4674 static void smb2_decrypt_offload(struct work_struct *work)
4675 {
4676         struct smb2_decrypt_work *dw = container_of(work,
4677                                 struct smb2_decrypt_work, decrypt);
4678         int rc;
4679         struct mid_q_entry *mid;
4680         struct iov_iter iter;
4681
4682         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4683         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4684                               &iter, true);
4685         if (rc) {
4686                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4687                 goto free_pages;
4688         }
4689
4690         dw->server->lstrp = jiffies;
4691         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4692         if (mid == NULL)
4693                 cifs_dbg(FYI, "mid not found\n");
4694         else {
4695                 mid->decrypted = true;
4696                 rc = handle_read_data(dw->server, mid, dw->buf,
4697                                       dw->server->vals->read_rsp_size,
4698                                       &dw->buffer, dw->len,
4699                                       true);
4700                 if (rc >= 0) {
4701 #ifdef CONFIG_CIFS_STATS2
4702                         mid->when_received = jiffies;
4703 #endif
4704                         if (dw->server->ops->is_network_name_deleted)
4705                                 dw->server->ops->is_network_name_deleted(dw->buf,
4706                                                                          dw->server);
4707
4708                         mid->callback(mid);
4709                 } else {
4710                         spin_lock(&dw->server->srv_lock);
4711                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4712                                 spin_lock(&dw->server->mid_lock);
4713                                 mid->mid_state = MID_RETRY_NEEDED;
4714                                 spin_unlock(&dw->server->mid_lock);
4715                                 spin_unlock(&dw->server->srv_lock);
4716                                 mid->callback(mid);
4717                         } else {
4718                                 spin_lock(&dw->server->mid_lock);
4719                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4720                                 mid->mid_flags &= ~(MID_DELETED);
4721                                 list_add_tail(&mid->qhead,
4722                                         &dw->server->pending_mid_q);
4723                                 spin_unlock(&dw->server->mid_lock);
4724                                 spin_unlock(&dw->server->srv_lock);
4725                         }
4726                 }
4727                 release_mid(mid);
4728         }
4729
4730 free_pages:
4731         cifs_clear_xarray_buffer(&dw->buffer);
4732         cifs_small_buf_release(dw->buf);
4733         kfree(dw);
4734 }
4735
4736
4737 static int
4738 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4739                        int *num_mids)
4740 {
4741         struct page *page;
4742         char *buf = server->smallbuf;
4743         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4744         struct iov_iter iter;
4745         unsigned int len, npages;
4746         unsigned int buflen = server->pdu_size;
4747         int rc;
4748         int i = 0;
4749         struct smb2_decrypt_work *dw;
4750
4751         dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4752         if (!dw)
4753                 return -ENOMEM;
4754         xa_init(&dw->buffer);
4755         INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4756         dw->server = server;
4757
4758         *num_mids = 1;
4759         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4760                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4761
4762         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4763         if (rc < 0)
4764                 goto free_dw;
4765         server->total_read += rc;
4766
4767         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4768                 server->vals->read_rsp_size;
4769         dw->len = len;
4770         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4771
4772         rc = -ENOMEM;
4773         for (; i < npages; i++) {
4774                 void *old;
4775
4776                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4777                 if (!page)
4778                         goto discard_data;
4779                 page->index = i;
4780                 old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4781                 if (xa_is_err(old)) {
4782                         rc = xa_err(old);
4783                         put_page(page);
4784                         goto discard_data;
4785                 }
4786                 xa_set_mark(&dw->buffer, i, XA_MARK_0);
4787         }
4788
4789         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4790
4791         /* Read the data into the buffer and clear excess bufferage. */
4792         rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4793         if (rc < 0)
4794                 goto discard_data;
4795
4796         server->total_read += rc;
4797         if (rc < npages * PAGE_SIZE)
4798                 iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4799         iov_iter_revert(&iter, npages * PAGE_SIZE);
4800         iov_iter_truncate(&iter, dw->len);
4801
4802         rc = cifs_discard_remaining_data(server);
4803         if (rc)
4804                 goto free_pages;
4805
4806         /*
4807          * For large reads, offload to different thread for better performance,
4808          * use more cores decrypting which can be expensive
4809          */
4810
4811         if ((server->min_offload) && (server->in_flight > 1) &&
4812             (server->pdu_size >= server->min_offload)) {
4813                 dw->buf = server->smallbuf;
4814                 server->smallbuf = (char *)cifs_small_buf_get();
4815
4816                 queue_work(decrypt_wq, &dw->decrypt);
4817                 *num_mids = 0; /* worker thread takes care of finding mid */
4818                 return -1;
4819         }
4820
4821         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4822                               &iter, false);
4823         if (rc)
4824                 goto free_pages;
4825
4826         *mid = smb2_find_mid(server, buf);
4827         if (*mid == NULL) {
4828                 cifs_dbg(FYI, "mid not found\n");
4829         } else {
4830                 cifs_dbg(FYI, "mid found\n");
4831                 (*mid)->decrypted = true;
4832                 rc = handle_read_data(server, *mid, buf,
4833                                       server->vals->read_rsp_size,
4834                                       &dw->buffer, dw->len, false);
4835                 if (rc >= 0) {
4836                         if (server->ops->is_network_name_deleted) {
4837                                 server->ops->is_network_name_deleted(buf,
4838                                                                 server);
4839                         }
4840                 }
4841         }
4842
4843 free_pages:
4844         cifs_clear_xarray_buffer(&dw->buffer);
4845 free_dw:
4846         kfree(dw);
4847         return rc;
4848 discard_data:
4849         cifs_discard_remaining_data(server);
4850         goto free_pages;
4851 }
4852
4853 static int
4854 receive_encrypted_standard(struct TCP_Server_Info *server,
4855                            struct mid_q_entry **mids, char **bufs,
4856                            int *num_mids)
4857 {
4858         int ret, length;
4859         char *buf = server->smallbuf;
4860         struct smb2_hdr *shdr;
4861         unsigned int pdu_length = server->pdu_size;
4862         unsigned int buf_size;
4863         unsigned int next_cmd;
4864         struct mid_q_entry *mid_entry;
4865         int next_is_large;
4866         char *next_buffer = NULL;
4867
4868         *num_mids = 0;
4869
4870         /* switch to large buffer if too big for a small one */
4871         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4872                 server->large_buf = true;
4873                 memcpy(server->bigbuf, buf, server->total_read);
4874                 buf = server->bigbuf;
4875         }
4876
4877         /* now read the rest */
4878         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4879                                 pdu_length - HEADER_SIZE(server) + 1);
4880         if (length < 0)
4881                 return length;
4882         server->total_read += length;
4883
4884         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4885         length = decrypt_raw_data(server, buf, buf_size, NULL, false);
4886         if (length)
4887                 return length;
4888
4889         next_is_large = server->large_buf;
4890 one_more:
4891         shdr = (struct smb2_hdr *)buf;
4892         next_cmd = le32_to_cpu(shdr->NextCommand);
4893         if (next_cmd) {
4894                 if (WARN_ON_ONCE(next_cmd > pdu_length))
4895                         return -1;
4896                 if (next_is_large)
4897                         next_buffer = (char *)cifs_buf_get();
4898                 else
4899                         next_buffer = (char *)cifs_small_buf_get();
4900                 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd);
4901         }
4902
4903         mid_entry = smb2_find_mid(server, buf);
4904         if (mid_entry == NULL)
4905                 cifs_dbg(FYI, "mid not found\n");
4906         else {
4907                 cifs_dbg(FYI, "mid found\n");
4908                 mid_entry->decrypted = true;
4909                 mid_entry->resp_buf_size = server->pdu_size;
4910         }
4911
4912         if (*num_mids >= MAX_COMPOUND) {
4913                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4914                 return -1;
4915         }
4916         bufs[*num_mids] = buf;
4917         mids[(*num_mids)++] = mid_entry;
4918
4919         if (mid_entry && mid_entry->handle)
4920                 ret = mid_entry->handle(server, mid_entry);
4921         else
4922                 ret = cifs_handle_standard(server, mid_entry);
4923
4924         if (ret == 0 && next_cmd) {
4925                 pdu_length -= next_cmd;
4926                 server->large_buf = next_is_large;
4927                 if (next_is_large)
4928                         server->bigbuf = buf = next_buffer;
4929                 else
4930                         server->smallbuf = buf = next_buffer;
4931                 goto one_more;
4932         } else if (ret != 0) {
4933                 /*
4934                  * ret != 0 here means that we didn't get to handle_mid() thus
4935                  * server->smallbuf and server->bigbuf are still valid. We need
4936                  * to free next_buffer because it is not going to be used
4937                  * anywhere.
4938                  */
4939                 if (next_is_large)
4940                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4941                 else
4942                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4943         }
4944
4945         return ret;
4946 }
4947
4948 static int
4949 smb3_receive_transform(struct TCP_Server_Info *server,
4950                        struct mid_q_entry **mids, char **bufs, int *num_mids)
4951 {
4952         char *buf = server->smallbuf;
4953         unsigned int pdu_length = server->pdu_size;
4954         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4955         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4956
4957         if (pdu_length < sizeof(struct smb2_transform_hdr) +
4958                                                 sizeof(struct smb2_hdr)) {
4959                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4960                          pdu_length);
4961                 cifs_reconnect(server, true);
4962                 return -ECONNABORTED;
4963         }
4964
4965         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4966                 cifs_server_dbg(VFS, "Transform message is broken\n");
4967                 cifs_reconnect(server, true);
4968                 return -ECONNABORTED;
4969         }
4970
4971         /* TODO: add support for compounds containing READ. */
4972         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4973                 return receive_encrypted_read(server, &mids[0], num_mids);
4974         }
4975
4976         return receive_encrypted_standard(server, mids, bufs, num_mids);
4977 }
4978
4979 int
4980 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
4981 {
4982         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
4983
4984         return handle_read_data(server, mid, buf, server->pdu_size,
4985                                 NULL, 0, false);
4986 }
4987
4988 static int smb2_next_header(struct TCP_Server_Info *server, char *buf,
4989                             unsigned int *noff)
4990 {
4991         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
4992         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
4993
4994         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
4995                 *noff = le32_to_cpu(t_hdr->OriginalMessageSize);
4996                 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff)))
4997                         return -EINVAL;
4998         } else {
4999                 *noff = le32_to_cpu(hdr->NextCommand);
5000         }
5001         if (unlikely(*noff && *noff < MID_HEADER_SIZE(server)))
5002                 return -EINVAL;
5003         return 0;
5004 }
5005
5006 static int __cifs_sfu_make_node(unsigned int xid, struct inode *inode,
5007                                 struct dentry *dentry, struct cifs_tcon *tcon,
5008                                 const char *full_path, umode_t mode, dev_t dev)
5009 {
5010         struct TCP_Server_Info *server = tcon->ses->server;
5011         struct cifs_open_parms oparms;
5012         struct cifs_io_parms io_parms = {};
5013         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5014         struct cifs_fid fid;
5015         unsigned int bytes_written;
5016         struct win_dev pdev = {};
5017         struct kvec iov[2];
5018         __u32 oplock = server->oplocks ? REQ_OPLOCK : 0;
5019         int rc;
5020
5021         switch (mode & S_IFMT) {
5022         case S_IFCHR:
5023                 strscpy(pdev.type, "IntxCHR");
5024                 pdev.major = cpu_to_le64(MAJOR(dev));
5025                 pdev.minor = cpu_to_le64(MINOR(dev));
5026                 break;
5027         case S_IFBLK:
5028                 strscpy(pdev.type, "IntxBLK");
5029                 pdev.major = cpu_to_le64(MAJOR(dev));
5030                 pdev.minor = cpu_to_le64(MINOR(dev));
5031                 break;
5032         case S_IFSOCK:
5033                 strscpy(pdev.type, "LnxSOCK");
5034                 break;
5035         case S_IFIFO:
5036                 strscpy(pdev.type, "LnxFIFO");
5037                 break;
5038         default:
5039                 return -EPERM;
5040         }
5041
5042         oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, GENERIC_WRITE,
5043                              FILE_CREATE, CREATE_NOT_DIR |
5044                              CREATE_OPTION_SPECIAL, ACL_NO_MODE);
5045         oparms.fid = &fid;
5046
5047         rc = server->ops->open(xid, &oparms, &oplock, NULL);
5048         if (rc)
5049                 return rc;
5050
5051         io_parms.pid = current->tgid;
5052         io_parms.tcon = tcon;
5053         io_parms.length = sizeof(pdev);
5054         iov[1].iov_base = &pdev;
5055         iov[1].iov_len = sizeof(pdev);
5056
5057         rc = server->ops->sync_write(xid, &fid, &io_parms,
5058                                      &bytes_written, iov, 1);
5059         server->ops->close(xid, tcon, &fid);
5060         return rc;
5061 }
5062
5063 int cifs_sfu_make_node(unsigned int xid, struct inode *inode,
5064                        struct dentry *dentry, struct cifs_tcon *tcon,
5065                        const char *full_path, umode_t mode, dev_t dev)
5066 {
5067         struct inode *new = NULL;
5068         int rc;
5069
5070         rc = __cifs_sfu_make_node(xid, inode, dentry, tcon,
5071                                   full_path, mode, dev);
5072         if (rc)
5073                 return rc;
5074
5075         if (tcon->posix_extensions) {
5076                 rc = smb311_posix_get_inode_info(&new, full_path, NULL,
5077                                                  inode->i_sb, xid);
5078         } else if (tcon->unix_ext) {
5079                 rc = cifs_get_inode_info_unix(&new, full_path,
5080                                               inode->i_sb, xid);
5081         } else {
5082                 rc = cifs_get_inode_info(&new, full_path, NULL,
5083                                          inode->i_sb, xid, NULL);
5084         }
5085         if (!rc)
5086                 d_instantiate(dentry, new);
5087         return rc;
5088 }
5089
5090 static int smb2_make_node(unsigned int xid, struct inode *inode,
5091                           struct dentry *dentry, struct cifs_tcon *tcon,
5092                           const char *full_path, umode_t mode, dev_t dev)
5093 {
5094         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5095         int rc;
5096
5097         /*
5098          * Check if mounted with mount parm 'sfu' mount parm.
5099          * SFU emulation should work with all servers, but only
5100          * supports block and char device (no socket & fifo),
5101          * and was used by default in earlier versions of Windows
5102          */
5103         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
5104                 rc = cifs_sfu_make_node(xid, inode, dentry, tcon,
5105                                         full_path, mode, dev);
5106         } else {
5107                 rc = smb2_mknod_reparse(xid, inode, dentry, tcon,
5108                                         full_path, mode, dev);
5109         }
5110         return rc;
5111 }
5112
5113 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5114 struct smb_version_operations smb20_operations = {
5115         .compare_fids = smb2_compare_fids,
5116         .setup_request = smb2_setup_request,
5117         .setup_async_request = smb2_setup_async_request,
5118         .check_receive = smb2_check_receive,
5119         .add_credits = smb2_add_credits,
5120         .set_credits = smb2_set_credits,
5121         .get_credits_field = smb2_get_credits_field,
5122         .get_credits = smb2_get_credits,
5123         .wait_mtu_credits = cifs_wait_mtu_credits,
5124         .get_next_mid = smb2_get_next_mid,
5125         .revert_current_mid = smb2_revert_current_mid,
5126         .read_data_offset = smb2_read_data_offset,
5127         .read_data_length = smb2_read_data_length,
5128         .map_error = map_smb2_to_linux_error,
5129         .find_mid = smb2_find_mid,
5130         .check_message = smb2_check_message,
5131         .dump_detail = smb2_dump_detail,
5132         .clear_stats = smb2_clear_stats,
5133         .print_stats = smb2_print_stats,
5134         .is_oplock_break = smb2_is_valid_oplock_break,
5135         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5136         .downgrade_oplock = smb2_downgrade_oplock,
5137         .need_neg = smb2_need_neg,
5138         .negotiate = smb2_negotiate,
5139         .negotiate_wsize = smb2_negotiate_wsize,
5140         .negotiate_rsize = smb2_negotiate_rsize,
5141         .sess_setup = SMB2_sess_setup,
5142         .logoff = SMB2_logoff,
5143         .tree_connect = SMB2_tcon,
5144         .tree_disconnect = SMB2_tdis,
5145         .qfs_tcon = smb2_qfs_tcon,
5146         .is_path_accessible = smb2_is_path_accessible,
5147         .can_echo = smb2_can_echo,
5148         .echo = SMB2_echo,
5149         .query_path_info = smb2_query_path_info,
5150         .query_reparse_point = smb2_query_reparse_point,
5151         .get_srv_inum = smb2_get_srv_inum,
5152         .query_file_info = smb2_query_file_info,
5153         .set_path_size = smb2_set_path_size,
5154         .set_file_size = smb2_set_file_size,
5155         .set_file_info = smb2_set_file_info,
5156         .set_compression = smb2_set_compression,
5157         .mkdir = smb2_mkdir,
5158         .mkdir_setinfo = smb2_mkdir_setinfo,
5159         .rmdir = smb2_rmdir,
5160         .unlink = smb2_unlink,
5161         .rename = smb2_rename_path,
5162         .create_hardlink = smb2_create_hardlink,
5163         .parse_reparse_point = smb2_parse_reparse_point,
5164         .query_mf_symlink = smb3_query_mf_symlink,
5165         .create_mf_symlink = smb3_create_mf_symlink,
5166         .create_reparse_symlink = smb2_create_reparse_symlink,
5167         .open = smb2_open_file,
5168         .set_fid = smb2_set_fid,
5169         .close = smb2_close_file,
5170         .flush = smb2_flush_file,
5171         .async_readv = smb2_async_readv,
5172         .async_writev = smb2_async_writev,
5173         .sync_read = smb2_sync_read,
5174         .sync_write = smb2_sync_write,
5175         .query_dir_first = smb2_query_dir_first,
5176         .query_dir_next = smb2_query_dir_next,
5177         .close_dir = smb2_close_dir,
5178         .calc_smb_size = smb2_calc_size,
5179         .is_status_pending = smb2_is_status_pending,
5180         .is_session_expired = smb2_is_session_expired,
5181         .oplock_response = smb2_oplock_response,
5182         .queryfs = smb2_queryfs,
5183         .mand_lock = smb2_mand_lock,
5184         .mand_unlock_range = smb2_unlock_range,
5185         .push_mand_locks = smb2_push_mandatory_locks,
5186         .get_lease_key = smb2_get_lease_key,
5187         .set_lease_key = smb2_set_lease_key,
5188         .new_lease_key = smb2_new_lease_key,
5189         .calc_signature = smb2_calc_signature,
5190         .is_read_op = smb2_is_read_op,
5191         .set_oplock_level = smb2_set_oplock_level,
5192         .create_lease_buf = smb2_create_lease_buf,
5193         .parse_lease_buf = smb2_parse_lease_buf,
5194         .copychunk_range = smb2_copychunk_range,
5195         .wp_retry_size = smb2_wp_retry_size,
5196         .dir_needs_close = smb2_dir_needs_close,
5197         .get_dfs_refer = smb2_get_dfs_refer,
5198         .select_sectype = smb2_select_sectype,
5199 #ifdef CONFIG_CIFS_XATTR
5200         .query_all_EAs = smb2_query_eas,
5201         .set_EA = smb2_set_ea,
5202 #endif /* CIFS_XATTR */
5203         .get_acl = get_smb2_acl,
5204         .get_acl_by_fid = get_smb2_acl_by_fid,
5205         .set_acl = set_smb2_acl,
5206         .next_header = smb2_next_header,
5207         .ioctl_query_info = smb2_ioctl_query_info,
5208         .make_node = smb2_make_node,
5209         .fiemap = smb3_fiemap,
5210         .llseek = smb3_llseek,
5211         .is_status_io_timeout = smb2_is_status_io_timeout,
5212         .is_network_name_deleted = smb2_is_network_name_deleted,
5213 };
5214 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5215
5216 struct smb_version_operations smb21_operations = {
5217         .compare_fids = smb2_compare_fids,
5218         .setup_request = smb2_setup_request,
5219         .setup_async_request = smb2_setup_async_request,
5220         .check_receive = smb2_check_receive,
5221         .add_credits = smb2_add_credits,
5222         .set_credits = smb2_set_credits,
5223         .get_credits_field = smb2_get_credits_field,
5224         .get_credits = smb2_get_credits,
5225         .wait_mtu_credits = smb2_wait_mtu_credits,
5226         .adjust_credits = smb2_adjust_credits,
5227         .get_next_mid = smb2_get_next_mid,
5228         .revert_current_mid = smb2_revert_current_mid,
5229         .read_data_offset = smb2_read_data_offset,
5230         .read_data_length = smb2_read_data_length,
5231         .map_error = map_smb2_to_linux_error,
5232         .find_mid = smb2_find_mid,
5233         .check_message = smb2_check_message,
5234         .dump_detail = smb2_dump_detail,
5235         .clear_stats = smb2_clear_stats,
5236         .print_stats = smb2_print_stats,
5237         .is_oplock_break = smb2_is_valid_oplock_break,
5238         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5239         .downgrade_oplock = smb2_downgrade_oplock,
5240         .need_neg = smb2_need_neg,
5241         .negotiate = smb2_negotiate,
5242         .negotiate_wsize = smb2_negotiate_wsize,
5243         .negotiate_rsize = smb2_negotiate_rsize,
5244         .sess_setup = SMB2_sess_setup,
5245         .logoff = SMB2_logoff,
5246         .tree_connect = SMB2_tcon,
5247         .tree_disconnect = SMB2_tdis,
5248         .qfs_tcon = smb2_qfs_tcon,
5249         .is_path_accessible = smb2_is_path_accessible,
5250         .can_echo = smb2_can_echo,
5251         .echo = SMB2_echo,
5252         .query_path_info = smb2_query_path_info,
5253         .query_reparse_point = smb2_query_reparse_point,
5254         .get_srv_inum = smb2_get_srv_inum,
5255         .query_file_info = smb2_query_file_info,
5256         .set_path_size = smb2_set_path_size,
5257         .set_file_size = smb2_set_file_size,
5258         .set_file_info = smb2_set_file_info,
5259         .set_compression = smb2_set_compression,
5260         .mkdir = smb2_mkdir,
5261         .mkdir_setinfo = smb2_mkdir_setinfo,
5262         .rmdir = smb2_rmdir,
5263         .unlink = smb2_unlink,
5264         .rename = smb2_rename_path,
5265         .create_hardlink = smb2_create_hardlink,
5266         .parse_reparse_point = smb2_parse_reparse_point,
5267         .query_mf_symlink = smb3_query_mf_symlink,
5268         .create_mf_symlink = smb3_create_mf_symlink,
5269         .create_reparse_symlink = smb2_create_reparse_symlink,
5270         .open = smb2_open_file,
5271         .set_fid = smb2_set_fid,
5272         .close = smb2_close_file,
5273         .flush = smb2_flush_file,
5274         .async_readv = smb2_async_readv,
5275         .async_writev = smb2_async_writev,
5276         .sync_read = smb2_sync_read,
5277         .sync_write = smb2_sync_write,
5278         .query_dir_first = smb2_query_dir_first,
5279         .query_dir_next = smb2_query_dir_next,
5280         .close_dir = smb2_close_dir,
5281         .calc_smb_size = smb2_calc_size,
5282         .is_status_pending = smb2_is_status_pending,
5283         .is_session_expired = smb2_is_session_expired,
5284         .oplock_response = smb2_oplock_response,
5285         .queryfs = smb2_queryfs,
5286         .mand_lock = smb2_mand_lock,
5287         .mand_unlock_range = smb2_unlock_range,
5288         .push_mand_locks = smb2_push_mandatory_locks,
5289         .get_lease_key = smb2_get_lease_key,
5290         .set_lease_key = smb2_set_lease_key,
5291         .new_lease_key = smb2_new_lease_key,
5292         .calc_signature = smb2_calc_signature,
5293         .is_read_op = smb21_is_read_op,
5294         .set_oplock_level = smb21_set_oplock_level,
5295         .create_lease_buf = smb2_create_lease_buf,
5296         .parse_lease_buf = smb2_parse_lease_buf,
5297         .copychunk_range = smb2_copychunk_range,
5298         .wp_retry_size = smb2_wp_retry_size,
5299         .dir_needs_close = smb2_dir_needs_close,
5300         .enum_snapshots = smb3_enum_snapshots,
5301         .notify = smb3_notify,
5302         .get_dfs_refer = smb2_get_dfs_refer,
5303         .select_sectype = smb2_select_sectype,
5304 #ifdef CONFIG_CIFS_XATTR
5305         .query_all_EAs = smb2_query_eas,
5306         .set_EA = smb2_set_ea,
5307 #endif /* CIFS_XATTR */
5308         .get_acl = get_smb2_acl,
5309         .get_acl_by_fid = get_smb2_acl_by_fid,
5310         .set_acl = set_smb2_acl,
5311         .next_header = smb2_next_header,
5312         .ioctl_query_info = smb2_ioctl_query_info,
5313         .make_node = smb2_make_node,
5314         .fiemap = smb3_fiemap,
5315         .llseek = smb3_llseek,
5316         .is_status_io_timeout = smb2_is_status_io_timeout,
5317         .is_network_name_deleted = smb2_is_network_name_deleted,
5318 };
5319
5320 struct smb_version_operations smb30_operations = {
5321         .compare_fids = smb2_compare_fids,
5322         .setup_request = smb2_setup_request,
5323         .setup_async_request = smb2_setup_async_request,
5324         .check_receive = smb2_check_receive,
5325         .add_credits = smb2_add_credits,
5326         .set_credits = smb2_set_credits,
5327         .get_credits_field = smb2_get_credits_field,
5328         .get_credits = smb2_get_credits,
5329         .wait_mtu_credits = smb2_wait_mtu_credits,
5330         .adjust_credits = smb2_adjust_credits,
5331         .get_next_mid = smb2_get_next_mid,
5332         .revert_current_mid = smb2_revert_current_mid,
5333         .read_data_offset = smb2_read_data_offset,
5334         .read_data_length = smb2_read_data_length,
5335         .map_error = map_smb2_to_linux_error,
5336         .find_mid = smb2_find_mid,
5337         .check_message = smb2_check_message,
5338         .dump_detail = smb2_dump_detail,
5339         .clear_stats = smb2_clear_stats,
5340         .print_stats = smb2_print_stats,
5341         .dump_share_caps = smb2_dump_share_caps,
5342         .is_oplock_break = smb2_is_valid_oplock_break,
5343         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5344         .downgrade_oplock = smb3_downgrade_oplock,
5345         .need_neg = smb2_need_neg,
5346         .negotiate = smb2_negotiate,
5347         .negotiate_wsize = smb3_negotiate_wsize,
5348         .negotiate_rsize = smb3_negotiate_rsize,
5349         .sess_setup = SMB2_sess_setup,
5350         .logoff = SMB2_logoff,
5351         .tree_connect = SMB2_tcon,
5352         .tree_disconnect = SMB2_tdis,
5353         .qfs_tcon = smb3_qfs_tcon,
5354         .query_server_interfaces = SMB3_request_interfaces,
5355         .is_path_accessible = smb2_is_path_accessible,
5356         .can_echo = smb2_can_echo,
5357         .echo = SMB2_echo,
5358         .query_path_info = smb2_query_path_info,
5359         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5360         .query_reparse_point = smb2_query_reparse_point,
5361         .get_srv_inum = smb2_get_srv_inum,
5362         .query_file_info = smb2_query_file_info,
5363         .set_path_size = smb2_set_path_size,
5364         .set_file_size = smb2_set_file_size,
5365         .set_file_info = smb2_set_file_info,
5366         .set_compression = smb2_set_compression,
5367         .mkdir = smb2_mkdir,
5368         .mkdir_setinfo = smb2_mkdir_setinfo,
5369         .rmdir = smb2_rmdir,
5370         .unlink = smb2_unlink,
5371         .rename = smb2_rename_path,
5372         .create_hardlink = smb2_create_hardlink,
5373         .parse_reparse_point = smb2_parse_reparse_point,
5374         .query_mf_symlink = smb3_query_mf_symlink,
5375         .create_mf_symlink = smb3_create_mf_symlink,
5376         .create_reparse_symlink = smb2_create_reparse_symlink,
5377         .open = smb2_open_file,
5378         .set_fid = smb2_set_fid,
5379         .close = smb2_close_file,
5380         .close_getattr = smb2_close_getattr,
5381         .flush = smb2_flush_file,
5382         .async_readv = smb2_async_readv,
5383         .async_writev = smb2_async_writev,
5384         .sync_read = smb2_sync_read,
5385         .sync_write = smb2_sync_write,
5386         .query_dir_first = smb2_query_dir_first,
5387         .query_dir_next = smb2_query_dir_next,
5388         .close_dir = smb2_close_dir,
5389         .calc_smb_size = smb2_calc_size,
5390         .is_status_pending = smb2_is_status_pending,
5391         .is_session_expired = smb2_is_session_expired,
5392         .oplock_response = smb2_oplock_response,
5393         .queryfs = smb2_queryfs,
5394         .mand_lock = smb2_mand_lock,
5395         .mand_unlock_range = smb2_unlock_range,
5396         .push_mand_locks = smb2_push_mandatory_locks,
5397         .get_lease_key = smb2_get_lease_key,
5398         .set_lease_key = smb2_set_lease_key,
5399         .new_lease_key = smb2_new_lease_key,
5400         .generate_signingkey = generate_smb30signingkey,
5401         .calc_signature = smb3_calc_signature,
5402         .set_integrity  = smb3_set_integrity,
5403         .is_read_op = smb21_is_read_op,
5404         .set_oplock_level = smb3_set_oplock_level,
5405         .create_lease_buf = smb3_create_lease_buf,
5406         .parse_lease_buf = smb3_parse_lease_buf,
5407         .copychunk_range = smb2_copychunk_range,
5408         .duplicate_extents = smb2_duplicate_extents,
5409         .validate_negotiate = smb3_validate_negotiate,
5410         .wp_retry_size = smb2_wp_retry_size,
5411         .dir_needs_close = smb2_dir_needs_close,
5412         .fallocate = smb3_fallocate,
5413         .enum_snapshots = smb3_enum_snapshots,
5414         .notify = smb3_notify,
5415         .init_transform_rq = smb3_init_transform_rq,
5416         .is_transform_hdr = smb3_is_transform_hdr,
5417         .receive_transform = smb3_receive_transform,
5418         .get_dfs_refer = smb2_get_dfs_refer,
5419         .select_sectype = smb2_select_sectype,
5420 #ifdef CONFIG_CIFS_XATTR
5421         .query_all_EAs = smb2_query_eas,
5422         .set_EA = smb2_set_ea,
5423 #endif /* CIFS_XATTR */
5424         .get_acl = get_smb2_acl,
5425         .get_acl_by_fid = get_smb2_acl_by_fid,
5426         .set_acl = set_smb2_acl,
5427         .next_header = smb2_next_header,
5428         .ioctl_query_info = smb2_ioctl_query_info,
5429         .make_node = smb2_make_node,
5430         .fiemap = smb3_fiemap,
5431         .llseek = smb3_llseek,
5432         .is_status_io_timeout = smb2_is_status_io_timeout,
5433         .is_network_name_deleted = smb2_is_network_name_deleted,
5434 };
5435
5436 struct smb_version_operations smb311_operations = {
5437         .compare_fids = smb2_compare_fids,
5438         .setup_request = smb2_setup_request,
5439         .setup_async_request = smb2_setup_async_request,
5440         .check_receive = smb2_check_receive,
5441         .add_credits = smb2_add_credits,
5442         .set_credits = smb2_set_credits,
5443         .get_credits_field = smb2_get_credits_field,
5444         .get_credits = smb2_get_credits,
5445         .wait_mtu_credits = smb2_wait_mtu_credits,
5446         .adjust_credits = smb2_adjust_credits,
5447         .get_next_mid = smb2_get_next_mid,
5448         .revert_current_mid = smb2_revert_current_mid,
5449         .read_data_offset = smb2_read_data_offset,
5450         .read_data_length = smb2_read_data_length,
5451         .map_error = map_smb2_to_linux_error,
5452         .find_mid = smb2_find_mid,
5453         .check_message = smb2_check_message,
5454         .dump_detail = smb2_dump_detail,
5455         .clear_stats = smb2_clear_stats,
5456         .print_stats = smb2_print_stats,
5457         .dump_share_caps = smb2_dump_share_caps,
5458         .is_oplock_break = smb2_is_valid_oplock_break,
5459         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5460         .downgrade_oplock = smb3_downgrade_oplock,
5461         .need_neg = smb2_need_neg,
5462         .negotiate = smb2_negotiate,
5463         .negotiate_wsize = smb3_negotiate_wsize,
5464         .negotiate_rsize = smb3_negotiate_rsize,
5465         .sess_setup = SMB2_sess_setup,
5466         .logoff = SMB2_logoff,
5467         .tree_connect = SMB2_tcon,
5468         .tree_disconnect = SMB2_tdis,
5469         .qfs_tcon = smb3_qfs_tcon,
5470         .query_server_interfaces = SMB3_request_interfaces,
5471         .is_path_accessible = smb2_is_path_accessible,
5472         .can_echo = smb2_can_echo,
5473         .echo = SMB2_echo,
5474         .query_path_info = smb2_query_path_info,
5475         .query_reparse_point = smb2_query_reparse_point,
5476         .get_srv_inum = smb2_get_srv_inum,
5477         .query_file_info = smb2_query_file_info,
5478         .set_path_size = smb2_set_path_size,
5479         .set_file_size = smb2_set_file_size,
5480         .set_file_info = smb2_set_file_info,
5481         .set_compression = smb2_set_compression,
5482         .mkdir = smb2_mkdir,
5483         .mkdir_setinfo = smb2_mkdir_setinfo,
5484         .posix_mkdir = smb311_posix_mkdir,
5485         .rmdir = smb2_rmdir,
5486         .unlink = smb2_unlink,
5487         .rename = smb2_rename_path,
5488         .create_hardlink = smb2_create_hardlink,
5489         .parse_reparse_point = smb2_parse_reparse_point,
5490         .query_mf_symlink = smb3_query_mf_symlink,
5491         .create_mf_symlink = smb3_create_mf_symlink,
5492         .create_reparse_symlink = smb2_create_reparse_symlink,
5493         .open = smb2_open_file,
5494         .set_fid = smb2_set_fid,
5495         .close = smb2_close_file,
5496         .close_getattr = smb2_close_getattr,
5497         .flush = smb2_flush_file,
5498         .async_readv = smb2_async_readv,
5499         .async_writev = smb2_async_writev,
5500         .sync_read = smb2_sync_read,
5501         .sync_write = smb2_sync_write,
5502         .query_dir_first = smb2_query_dir_first,
5503         .query_dir_next = smb2_query_dir_next,
5504         .close_dir = smb2_close_dir,
5505         .calc_smb_size = smb2_calc_size,
5506         .is_status_pending = smb2_is_status_pending,
5507         .is_session_expired = smb2_is_session_expired,
5508         .oplock_response = smb2_oplock_response,
5509         .queryfs = smb311_queryfs,
5510         .mand_lock = smb2_mand_lock,
5511         .mand_unlock_range = smb2_unlock_range,
5512         .push_mand_locks = smb2_push_mandatory_locks,
5513         .get_lease_key = smb2_get_lease_key,
5514         .set_lease_key = smb2_set_lease_key,
5515         .new_lease_key = smb2_new_lease_key,
5516         .generate_signingkey = generate_smb311signingkey,
5517         .calc_signature = smb3_calc_signature,
5518         .set_integrity  = smb3_set_integrity,
5519         .is_read_op = smb21_is_read_op,
5520         .set_oplock_level = smb3_set_oplock_level,
5521         .create_lease_buf = smb3_create_lease_buf,
5522         .parse_lease_buf = smb3_parse_lease_buf,
5523         .copychunk_range = smb2_copychunk_range,
5524         .duplicate_extents = smb2_duplicate_extents,
5525 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5526         .wp_retry_size = smb2_wp_retry_size,
5527         .dir_needs_close = smb2_dir_needs_close,
5528         .fallocate = smb3_fallocate,
5529         .enum_snapshots = smb3_enum_snapshots,
5530         .notify = smb3_notify,
5531         .init_transform_rq = smb3_init_transform_rq,
5532         .is_transform_hdr = smb3_is_transform_hdr,
5533         .receive_transform = smb3_receive_transform,
5534         .get_dfs_refer = smb2_get_dfs_refer,
5535         .select_sectype = smb2_select_sectype,
5536 #ifdef CONFIG_CIFS_XATTR
5537         .query_all_EAs = smb2_query_eas,
5538         .set_EA = smb2_set_ea,
5539 #endif /* CIFS_XATTR */
5540         .get_acl = get_smb2_acl,
5541         .get_acl_by_fid = get_smb2_acl_by_fid,
5542         .set_acl = set_smb2_acl,
5543         .next_header = smb2_next_header,
5544         .ioctl_query_info = smb2_ioctl_query_info,
5545         .make_node = smb2_make_node,
5546         .fiemap = smb3_fiemap,
5547         .llseek = smb3_llseek,
5548         .is_status_io_timeout = smb2_is_status_io_timeout,
5549         .is_network_name_deleted = smb2_is_network_name_deleted,
5550 };
5551
5552 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5553 struct smb_version_values smb20_values = {
5554         .version_string = SMB20_VERSION_STRING,
5555         .protocol_id = SMB20_PROT_ID,
5556         .req_capabilities = 0, /* MBZ */
5557         .large_lock_type = 0,
5558         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5559         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5560         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5561         .header_size = sizeof(struct smb2_hdr),
5562         .header_preamble_size = 0,
5563         .max_header_size = MAX_SMB2_HDR_SIZE,
5564         .read_rsp_size = sizeof(struct smb2_read_rsp),
5565         .lock_cmd = SMB2_LOCK,
5566         .cap_unix = 0,
5567         .cap_nt_find = SMB2_NT_FIND,
5568         .cap_large_files = SMB2_LARGE_FILES,
5569         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5570         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5571         .create_lease_size = sizeof(struct create_lease),
5572 };
5573 #endif /* ALLOW_INSECURE_LEGACY */
5574
5575 struct smb_version_values smb21_values = {
5576         .version_string = SMB21_VERSION_STRING,
5577         .protocol_id = SMB21_PROT_ID,
5578         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5579         .large_lock_type = 0,
5580         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5581         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5582         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5583         .header_size = sizeof(struct smb2_hdr),
5584         .header_preamble_size = 0,
5585         .max_header_size = MAX_SMB2_HDR_SIZE,
5586         .read_rsp_size = sizeof(struct smb2_read_rsp),
5587         .lock_cmd = SMB2_LOCK,
5588         .cap_unix = 0,
5589         .cap_nt_find = SMB2_NT_FIND,
5590         .cap_large_files = SMB2_LARGE_FILES,
5591         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5592         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5593         .create_lease_size = sizeof(struct create_lease),
5594 };
5595
5596 struct smb_version_values smb3any_values = {
5597         .version_string = SMB3ANY_VERSION_STRING,
5598         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5599         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5600         .large_lock_type = 0,
5601         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5602         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5603         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5604         .header_size = sizeof(struct smb2_hdr),
5605         .header_preamble_size = 0,
5606         .max_header_size = MAX_SMB2_HDR_SIZE,
5607         .read_rsp_size = sizeof(struct smb2_read_rsp),
5608         .lock_cmd = SMB2_LOCK,
5609         .cap_unix = 0,
5610         .cap_nt_find = SMB2_NT_FIND,
5611         .cap_large_files = SMB2_LARGE_FILES,
5612         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5613         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5614         .create_lease_size = sizeof(struct create_lease_v2),
5615 };
5616
5617 struct smb_version_values smbdefault_values = {
5618         .version_string = SMBDEFAULT_VERSION_STRING,
5619         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5620         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5621         .large_lock_type = 0,
5622         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5623         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5624         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5625         .header_size = sizeof(struct smb2_hdr),
5626         .header_preamble_size = 0,
5627         .max_header_size = MAX_SMB2_HDR_SIZE,
5628         .read_rsp_size = sizeof(struct smb2_read_rsp),
5629         .lock_cmd = SMB2_LOCK,
5630         .cap_unix = 0,
5631         .cap_nt_find = SMB2_NT_FIND,
5632         .cap_large_files = SMB2_LARGE_FILES,
5633         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5634         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5635         .create_lease_size = sizeof(struct create_lease_v2),
5636 };
5637
5638 struct smb_version_values smb30_values = {
5639         .version_string = SMB30_VERSION_STRING,
5640         .protocol_id = SMB30_PROT_ID,
5641         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5642         .large_lock_type = 0,
5643         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5644         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5645         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5646         .header_size = sizeof(struct smb2_hdr),
5647         .header_preamble_size = 0,
5648         .max_header_size = MAX_SMB2_HDR_SIZE,
5649         .read_rsp_size = sizeof(struct smb2_read_rsp),
5650         .lock_cmd = SMB2_LOCK,
5651         .cap_unix = 0,
5652         .cap_nt_find = SMB2_NT_FIND,
5653         .cap_large_files = SMB2_LARGE_FILES,
5654         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5655         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5656         .create_lease_size = sizeof(struct create_lease_v2),
5657 };
5658
5659 struct smb_version_values smb302_values = {
5660         .version_string = SMB302_VERSION_STRING,
5661         .protocol_id = SMB302_PROT_ID,
5662         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5663         .large_lock_type = 0,
5664         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5665         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5666         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5667         .header_size = sizeof(struct smb2_hdr),
5668         .header_preamble_size = 0,
5669         .max_header_size = MAX_SMB2_HDR_SIZE,
5670         .read_rsp_size = sizeof(struct smb2_read_rsp),
5671         .lock_cmd = SMB2_LOCK,
5672         .cap_unix = 0,
5673         .cap_nt_find = SMB2_NT_FIND,
5674         .cap_large_files = SMB2_LARGE_FILES,
5675         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5676         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5677         .create_lease_size = sizeof(struct create_lease_v2),
5678 };
5679
5680 struct smb_version_values smb311_values = {
5681         .version_string = SMB311_VERSION_STRING,
5682         .protocol_id = SMB311_PROT_ID,
5683         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5684         .large_lock_type = 0,
5685         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5686         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5687         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5688         .header_size = sizeof(struct smb2_hdr),
5689         .header_preamble_size = 0,
5690         .max_header_size = MAX_SMB2_HDR_SIZE,
5691         .read_rsp_size = sizeof(struct smb2_read_rsp),
5692         .lock_cmd = SMB2_LOCK,
5693         .cap_unix = 0,
5694         .cap_nt_find = SMB2_NT_FIND,
5695         .cap_large_files = SMB2_LARGE_FILES,
5696         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5697         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5698         .create_lease_size = sizeof(struct create_lease_v2),
5699 };