fs/smb/client/smb2inode.c

   1 // SPDX-License-Identifier: LGPL-2.1
   2 /*
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002, 2011
   5  *                 Etersoft, 2012
   6  *   Author(s): Pavel Shilovsky ([email protected]),
   7  *              Steve French ([email protected])
   8  *
   9  */
  10 #include <linux/fs.h>
  11 #include <linux/stat.h>
  12 #include <linux/slab.h>
  13 #include <linux/pagemap.h>
  14 #include <asm/div64.h>
  15 #include "cifsfs.h"
  16 #include "cifspdu.h"
  17 #include "cifsglob.h"
  18 #include "cifsproto.h"
  19 #include "cifs_debug.h"
  20 #include "cifs_fs_sb.h"
  21 #include "cifs_unicode.h"
  22 #include "fscache.h"
  23 #include "smb2glob.h"
  24 #include "smb2pdu.h"
  25 #include "smb2proto.h"
  26 #include "cached_dir.h"
  27 #include "smb2status.h"
  28
  29 static void
  30 free_set_inf_compound(struct smb_rqst *rqst)
  31 {
  32         if (rqst[1].rq_iov)
  33                 SMB2_set_info_free(&rqst[1]);
  34         if (rqst[2].rq_iov)
  35                 SMB2_close_free(&rqst[2]);
  36 }
  37
  38 /*
  39  * note: If cfile is passed, the reference to it is dropped here.
  40  * So make sure that you do not reuse cfile after return from this func.
  41  *
  42  * If passing @out_iov and @out_buftype, ensure to make them both large enough
  43  * (>= 3) to hold all compounded responses.  Caller is also responsible for
  44  * freeing them up with free_rsp_buf().
  45  */
  46 static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
  47                             struct cifs_sb_info *cifs_sb, const char *full_path,
  48                             __u32 desired_access, __u32 create_disposition, __u32 create_options,
  49                             umode_t mode, void *ptr, int command, struct cifsFileInfo *cfile,
  50                             __u8 **extbuf, size_t *extbuflen,
  51                             struct kvec *out_iov, int *out_buftype)
  52 {
  53         struct smb2_compound_vars *vars = NULL;
  54         struct kvec *rsp_iov;
  55         struct smb_rqst *rqst;
  56         int rc;
  57         __le16 *utf16_path = NULL;
  58         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
  59         struct cifs_fid fid;
  60         struct cifs_ses *ses = tcon->ses;
  61         struct TCP_Server_Info *server;
  62         int num_rqst = 0;
  63         int resp_buftype[3];
  64         struct smb2_query_info_rsp *qi_rsp = NULL;
  65         struct cifs_open_info_data *idata;
  66         int flags = 0;
  67         __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
  68         unsigned int size[2];
  69         void *data[2];
  70         int len;
  71
  72         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
  73         if (vars == NULL)
  74                 return -ENOMEM;
  75         rqst = &vars->rqst[0];
  76         rsp_iov = &vars->rsp_iov[0];
  77
  78         server = cifs_pick_channel(ses);
  79
  80         if (smb3_encryption_required(tcon))
  81                 flags |= CIFS_TRANSFORM_REQ;
  82
  83         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
  84
  85         /* We already have a handle so we can skip the open */
  86         if (cfile)
  87                 goto after_open;
  88
  89         /* Open */
  90         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
  91         if (!utf16_path) {
  92                 rc = -ENOMEM;
  93                 goto finished;
  94         }
  95
  96         vars->oparms = (struct cifs_open_parms) {
  97                 .tcon = tcon,
  98                 .path = full_path,
  99                 .desired_access = desired_access,
 100                 .disposition = create_disposition,
 101                 .create_options = cifs_create_options(cifs_sb, create_options),
 102                 .fid = &fid,
 103                 .mode = mode,
 104                 .cifs_sb = cifs_sb,
 105         };
 106
 107         rqst[num_rqst].rq_iov = &vars->open_iov[0];
 108         rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
 109         rc = SMB2_open_init(tcon, server,
 110                             &rqst[num_rqst], &oplock, &vars->oparms,
 111                             utf16_path);
 112         kfree(utf16_path);
 113         if (rc)
 114                 goto finished;
 115
 116         smb2_set_next_command(tcon, &rqst[num_rqst]);
 117  after_open:
 118         num_rqst++;
 119         rc = 0;
 120
 121         /* Operation */
 122         switch (command) {
 123         case SMB2_OP_QUERY_INFO:
 124                 rqst[num_rqst].rq_iov = &vars->qi_iov;
 125                 rqst[num_rqst].rq_nvec = 1;
 126
 127                 if (cfile)
 128                         rc = SMB2_query_info_init(tcon, server,
 129                                 &rqst[num_rqst],
 130                                 cfile->fid.persistent_fid,
 131                                 cfile->fid.volatile_fid,
 132                                 FILE_ALL_INFORMATION,
 133                                 SMB2_O_INFO_FILE, 0,
 134                                 sizeof(struct smb2_file_all_info) +
 135                                           PATH_MAX * 2, 0, NULL);
 136                 else {
 137                         rc = SMB2_query_info_init(tcon, server,
 138                                 &rqst[num_rqst],
 139                                 COMPOUND_FID,
 140                                 COMPOUND_FID,
 141                                 FILE_ALL_INFORMATION,
 142                                 SMB2_O_INFO_FILE, 0,
 143                                 sizeof(struct smb2_file_all_info) +
 144                                           PATH_MAX * 2, 0, NULL);
 145                         if (!rc) {
 146                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 147                                 smb2_set_related(&rqst[num_rqst]);
 148                         }
 149                 }
 150
 151                 if (rc)
 152                         goto finished;
 153                 num_rqst++;
 154                 trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
 155                                                      full_path);
 156                 break;
 157         case SMB2_OP_POSIX_QUERY_INFO:
 158                 rqst[num_rqst].rq_iov = &vars->qi_iov;
 159                 rqst[num_rqst].rq_nvec = 1;
 160
 161                 if (cfile)
 162                         rc = SMB2_query_info_init(tcon, server,
 163                                 &rqst[num_rqst],
 164                                 cfile->fid.persistent_fid,
 165                                 cfile->fid.volatile_fid,
 166                                 SMB_FIND_FILE_POSIX_INFO,
 167                                 SMB2_O_INFO_FILE, 0,
 168                                 /* TBD: fix following to allow for longer SIDs */
 169                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 170                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 171                 else {
 172                         rc = SMB2_query_info_init(tcon, server,
 173                                 &rqst[num_rqst],
 174                                 COMPOUND_FID,
 175                                 COMPOUND_FID,
 176                                 SMB_FIND_FILE_POSIX_INFO,
 177                                 SMB2_O_INFO_FILE, 0,
 178                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 179                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 180                         if (!rc) {
 181                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 182                                 smb2_set_related(&rqst[num_rqst]);
 183                         }
 184                 }
 185
 186                 if (rc)
 187                         goto finished;
 188                 num_rqst++;
 189                 trace_smb3_posix_query_info_compound_enter(xid, ses->Suid, tcon->tid, full_path);
 190                 break;
 191         case SMB2_OP_DELETE:
 192                 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
 193                 break;
 194         case SMB2_OP_MKDIR:
 195                 /*
 196                  * Directories are created through parameters in the
 197                  * SMB2_open() call.
 198                  */
 199                 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
 200                 break;
 201         case SMB2_OP_RMDIR:
 202                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 203                 rqst[num_rqst].rq_nvec = 1;
 204
 205                 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
 206                 data[0] = &delete_pending[0];
 207
 208                 rc = SMB2_set_info_init(tcon, server,
 209                                         &rqst[num_rqst], COMPOUND_FID,
 210                                         COMPOUND_FID, current->tgid,
 211                                         FILE_DISPOSITION_INFORMATION,
 212                                         SMB2_O_INFO_FILE, 0, data, size);
 213                 if (rc)
 214                         goto finished;
 215                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 216                 smb2_set_related(&rqst[num_rqst++]);
 217                 trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
 218                 break;
 219         case SMB2_OP_SET_EOF:
 220                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 221                 rqst[num_rqst].rq_nvec = 1;
 222
 223                 size[0] = 8; /* sizeof __le64 */
 224                 data[0] = ptr;
 225
 226                 if (cfile) {
 227                         rc = SMB2_set_info_init(tcon, server,
 228                                                 &rqst[num_rqst],
 229                                                 cfile->fid.persistent_fid,
 230                                                 cfile->fid.volatile_fid,
 231                                                 current->tgid,
 232                                                 FILE_END_OF_FILE_INFORMATION,
 233                                                 SMB2_O_INFO_FILE, 0,
 234                                                 data, size);
 235                 } else {
 236                         rc = SMB2_set_info_init(tcon, server,
 237                                                 &rqst[num_rqst],
 238                                                 COMPOUND_FID,
 239                                                 COMPOUND_FID,
 240                                                 current->tgid,
 241                                                 FILE_END_OF_FILE_INFORMATION,
 242                                                 SMB2_O_INFO_FILE, 0,
 243                                                 data, size);
 244                         if (!rc) {
 245                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 246                                 smb2_set_related(&rqst[num_rqst]);
 247                         }
 248                 }
 249                 if (rc)
 250                         goto finished;
 251                 num_rqst++;
 252                 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
 253                 break;
 254         case SMB2_OP_SET_INFO:
 255                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 256                 rqst[num_rqst].rq_nvec = 1;
 257
 258
 259                 size[0] = sizeof(FILE_BASIC_INFO);
 260                 data[0] = ptr;
 261
 262                 if (cfile)
 263                         rc = SMB2_set_info_init(tcon, server,
 264                                 &rqst[num_rqst],
 265                                 cfile->fid.persistent_fid,
 266                                 cfile->fid.volatile_fid, current->tgid,
 267                                 FILE_BASIC_INFORMATION,
 268                                 SMB2_O_INFO_FILE, 0, data, size);
 269                 else {
 270                         rc = SMB2_set_info_init(tcon, server,
 271                                 &rqst[num_rqst],
 272                                 COMPOUND_FID,
 273                                 COMPOUND_FID, current->tgid,
 274                                 FILE_BASIC_INFORMATION,
 275                                 SMB2_O_INFO_FILE, 0, data, size);
 276                         if (!rc) {
 277                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 278                                 smb2_set_related(&rqst[num_rqst]);
 279                         }
 280                 }
 281
 282                 if (rc)
 283                         goto finished;
 284                 num_rqst++;
 285                 trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
 286                                                    full_path);
 287                 break;
 288         case SMB2_OP_RENAME:
 289                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 290                 rqst[num_rqst].rq_nvec = 2;
 291
 292                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 293
 294                 vars->rename_info.ReplaceIfExists = 1;
 295                 vars->rename_info.RootDirectory = 0;
 296                 vars->rename_info.FileNameLength = cpu_to_le32(len);
 297
 298                 size[0] = sizeof(struct smb2_file_rename_info);
 299                 data[0] = &vars->rename_info;
 300
 301                 size[1] = len + 2 /* null */;
 302                 data[1] = (__le16 *)ptr;
 303
 304                 if (cfile)
 305                         rc = SMB2_set_info_init(tcon, server,
 306                                                 &rqst[num_rqst],
 307                                                 cfile->fid.persistent_fid,
 308                                                 cfile->fid.volatile_fid,
 309                                         current->tgid, FILE_RENAME_INFORMATION,
 310                                         SMB2_O_INFO_FILE, 0, data, size);
 311                 else {
 312                         rc = SMB2_set_info_init(tcon, server,
 313                                         &rqst[num_rqst],
 314                                         COMPOUND_FID, COMPOUND_FID,
 315                                         current->tgid, FILE_RENAME_INFORMATION,
 316                                         SMB2_O_INFO_FILE, 0, data, size);
 317                         if (!rc) {
 318                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 319                                 smb2_set_related(&rqst[num_rqst]);
 320                         }
 321                 }
 322                 if (rc)
 323                         goto finished;
 324                 num_rqst++;
 325                 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
 326                 break;
 327         case SMB2_OP_HARDLINK:
 328                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 329                 rqst[num_rqst].rq_nvec = 2;
 330
 331                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 332
 333                 vars->link_info.ReplaceIfExists = 0;
 334                 vars->link_info.RootDirectory = 0;
 335                 vars->link_info.FileNameLength = cpu_to_le32(len);
 336
 337                 size[0] = sizeof(struct smb2_file_link_info);
 338                 data[0] = &vars->link_info;
 339
 340                 size[1] = len + 2 /* null */;
 341                 data[1] = (__le16 *)ptr;
 342
 343                 rc = SMB2_set_info_init(tcon, server,
 344                                         &rqst[num_rqst], COMPOUND_FID,
 345                                         COMPOUND_FID, current->tgid,
 346                                         FILE_LINK_INFORMATION,
 347                                         SMB2_O_INFO_FILE, 0, data, size);
 348                 if (rc)
 349                         goto finished;
 350                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 351                 smb2_set_related(&rqst[num_rqst++]);
 352                 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
 353                 break;
 354         default:
 355                 cifs_dbg(VFS, "Invalid command\n");
 356                 rc = -EINVAL;
 357         }
 358         if (rc)
 359                 goto finished;
 360
 361         /* We already have a handle so we can skip the close */
 362         if (cfile)
 363                 goto after_close;
 364         /* Close */
 365         flags |= CIFS_CP_CREATE_CLOSE_OP;
 366         rqst[num_rqst].rq_iov = &vars->close_iov;
 367         rqst[num_rqst].rq_nvec = 1;
 368         rc = SMB2_close_init(tcon, server,
 369                              &rqst[num_rqst], COMPOUND_FID,
 370                              COMPOUND_FID, false);
 371         smb2_set_related(&rqst[num_rqst]);
 372         if (rc)
 373                 goto finished;
 374  after_close:
 375         num_rqst++;
 376
 377         if (cfile) {
 378                 rc = compound_send_recv(xid, ses, server,
 379                                         flags, num_rqst - 2,
 380                                         &rqst[1], &resp_buftype[1],
 381                                         &rsp_iov[1]);
 382         } else
 383                 rc = compound_send_recv(xid, ses, server,
 384                                         flags, num_rqst,
 385                                         rqst, resp_buftype,
 386                                         rsp_iov);
 387
 388  finished:
 389         SMB2_open_free(&rqst[0]);
 390         if (rc == -EREMCHG) {
 391                 pr_warn_once("server share %s deleted\n", tcon->tree_name);
 392                 tcon->need_reconnect = true;
 393         }
 394
 395         switch (command) {
 396         case SMB2_OP_QUERY_INFO:
 397                 idata = ptr;
 398                 if (rc == 0 && cfile && cfile->symlink_target) {
 399                         idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 400                         if (!idata->symlink_target)
 401                                 rc = -ENOMEM;
 402                 }
 403                 if (rc == 0) {
 404                         qi_rsp = (struct smb2_query_info_rsp *)
 405                                 rsp_iov[1].iov_base;
 406                         rc = smb2_validate_and_copy_iov(
 407                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 408                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 409                                 &rsp_iov[1], sizeof(idata->fi), (char *)&idata->fi);
 410                 }
 411                 if (rqst[1].rq_iov)
 412                         SMB2_query_info_free(&rqst[1]);
 413                 if (rqst[2].rq_iov)
 414                         SMB2_close_free(&rqst[2]);
 415                 if (rc)
 416                         trace_smb3_query_info_compound_err(xid,  ses->Suid,
 417                                                 tcon->tid, rc);
 418                 else
 419                         trace_smb3_query_info_compound_done(xid, ses->Suid,
 420                                                 tcon->tid);
 421                 break;
 422         case SMB2_OP_POSIX_QUERY_INFO:
 423                 idata = ptr;
 424                 if (rc == 0 && cfile && cfile->symlink_target) {
 425                         idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 426                         if (!idata->symlink_target)
 427                                 rc = -ENOMEM;
 428                 }
 429                 if (rc == 0) {
 430                         qi_rsp = (struct smb2_query_info_rsp *)
 431                                 rsp_iov[1].iov_base;
 432                         rc = smb2_validate_and_copy_iov(
 433                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 434                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 435                                 &rsp_iov[1], sizeof(idata->posix_fi) /* add SIDs */,
 436                                 (char *)&idata->posix_fi);
 437                 }
 438                 if (rc == 0) {
 439                         unsigned int length = le32_to_cpu(qi_rsp->OutputBufferLength);
 440
 441                         if (length > sizeof(idata->posix_fi)) {
 442                                 char *base = (char *)rsp_iov[1].iov_base +
 443                                         le16_to_cpu(qi_rsp->OutputBufferOffset) +
 444                                         sizeof(idata->posix_fi);
 445                                 *extbuflen = length - sizeof(idata->posix_fi);
 446                                 *extbuf = kmemdup(base, *extbuflen, GFP_KERNEL);
 447                                 if (!*extbuf)
 448                                         rc = -ENOMEM;
 449                         } else {
 450                                 rc = -EINVAL;
 451                         }
 452                 }
 453                 if (rqst[1].rq_iov)
 454                         SMB2_query_info_free(&rqst[1]);
 455                 if (rqst[2].rq_iov)
 456                         SMB2_close_free(&rqst[2]);
 457                 if (rc)
 458                         trace_smb3_posix_query_info_compound_err(xid,  ses->Suid, tcon->tid, rc);
 459                 else
 460                         trace_smb3_posix_query_info_compound_done(xid, ses->Suid, tcon->tid);
 461                 break;
 462         case SMB2_OP_DELETE:
 463                 if (rc)
 464                         trace_smb3_delete_err(xid,  ses->Suid, tcon->tid, rc);
 465                 else
 466                         trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
 467                 if (rqst[1].rq_iov)
 468                         SMB2_close_free(&rqst[1]);
 469                 break;
 470         case SMB2_OP_MKDIR:
 471                 if (rc)
 472                         trace_smb3_mkdir_err(xid,  ses->Suid, tcon->tid, rc);
 473                 else
 474                         trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
 475                 if (rqst[1].rq_iov)
 476                         SMB2_close_free(&rqst[1]);
 477                 break;
 478         case SMB2_OP_HARDLINK:
 479                 if (rc)
 480                         trace_smb3_hardlink_err(xid,  ses->Suid, tcon->tid, rc);
 481                 else
 482                         trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
 483                 free_set_inf_compound(rqst);
 484                 break;
 485         case SMB2_OP_RENAME:
 486                 if (rc)
 487                         trace_smb3_rename_err(xid,  ses->Suid, tcon->tid, rc);
 488                 else
 489                         trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
 490                 free_set_inf_compound(rqst);
 491                 break;
 492         case SMB2_OP_RMDIR:
 493                 if (rc)
 494                         trace_smb3_rmdir_err(xid,  ses->Suid, tcon->tid, rc);
 495                 else
 496                         trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
 497                 free_set_inf_compound(rqst);
 498                 break;
 499         case SMB2_OP_SET_EOF:
 500                 if (rc)
 501                         trace_smb3_set_eof_err(xid,  ses->Suid, tcon->tid, rc);
 502                 else
 503                         trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
 504                 free_set_inf_compound(rqst);
 505                 break;
 506         case SMB2_OP_SET_INFO:
 507                 if (rc)
 508                         trace_smb3_set_info_compound_err(xid,  ses->Suid,
 509                                                 tcon->tid, rc);
 510                 else
 511                         trace_smb3_set_info_compound_done(xid, ses->Suid,
 512                                                 tcon->tid);
 513                 free_set_inf_compound(rqst);
 514                 break;
 515         }
 516
 517         if (cfile)
 518                 cifsFileInfo_put(cfile);
 519
 520         if (out_iov && out_buftype) {
 521                 memcpy(out_iov, rsp_iov, 3 * sizeof(*out_iov));
 522                 memcpy(out_buftype, resp_buftype, 3 * sizeof(*out_buftype));
 523         } else {
 524                 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 525                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 526                 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
 527         }
 528         kfree(vars);
 529         return rc;
 530 }
 531
 532 static int parse_create_response(struct cifs_open_info_data *data,
 533                                  struct cifs_sb_info *cifs_sb,
 534                                  const struct kvec *iov)
 535 {
 536         struct smb2_create_rsp *rsp = iov->iov_base;
 537         bool reparse_point = false;
 538         u32 tag = 0;
 539         int rc = 0;
 540
 541         switch (rsp->hdr.Status) {
 542         case STATUS_IO_REPARSE_TAG_NOT_HANDLED:
 543                 reparse_point = true;
 544                 break;
 545         case STATUS_STOPPED_ON_SYMLINK:
 546                 rc = smb2_parse_symlink_response(cifs_sb, iov,
 547                                                  &data->symlink_target);
 548                 if (rc)
 549                         return rc;
 550                 tag = IO_REPARSE_TAG_SYMLINK;
 551                 reparse_point = true;
 552                 break;
 553         case STATUS_SUCCESS:
 554                 reparse_point = !!(rsp->Flags & SMB2_CREATE_FLAG_REPARSEPOINT);
 555                 break;
 556         }
 557         data->reparse_point = reparse_point;
 558         data->reparse_tag = tag;
 559         return rc;
 560 }
 561
 562 int smb2_query_path_info(const unsigned int xid,
 563                          struct cifs_tcon *tcon,
 564                          struct cifs_sb_info *cifs_sb,
 565                          const char *full_path,
 566                          struct cifs_open_info_data *data)
 567 {
 568         __u32 create_options = 0;
 569         struct cifsFileInfo *cfile;
 570         struct cached_fid *cfid = NULL;
 571         struct smb2_hdr *hdr;
 572         struct kvec out_iov[3] = {};
 573         int out_buftype[3] = {};
 574         bool islink;
 575         int rc, rc2;
 576
 577         data->adjust_tz = false;
 578         data->reparse_point = false;
 579
 580         if (strcmp(full_path, ""))
 581                 rc = -ENOENT;
 582         else
 583                 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, false, &cfid);
 584         /* If it is a root and its handle is cached then use it */
 585         if (!rc) {
 586                 if (cfid->file_all_info_is_valid) {
 587                         memcpy(&data->fi, &cfid->file_all_info, sizeof(data->fi));
 588                 } else {
 589                         rc = SMB2_query_info(xid, tcon, cfid->fid.persistent_fid,
 590                                              cfid->fid.volatile_fid, &data->fi);
 591                 }
 592                 close_cached_dir(cfid);
 593                 return rc;
 594         }
 595
 596         cifs_get_readable_path(tcon, full_path, &cfile);
 597         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN,
 598                               create_options, ACL_NO_MODE, data, SMB2_OP_QUERY_INFO, cfile,
 599                               NULL, NULL, out_iov, out_buftype);
 600         hdr = out_iov[0].iov_base;
 601         /*
 602          * If first iov is unset, then SMB session was dropped or we've got a
 603          * cached open file (@cfile).
 604          */
 605         if (!hdr || out_buftype[0] == CIFS_NO_BUFFER)
 606                 goto out;
 607
 608         switch (rc) {
 609         case 0:
 610         case -EOPNOTSUPP:
 611                 rc = parse_create_response(data, cifs_sb, &out_iov[0]);
 612                 if (rc || !data->reparse_point)
 613                         goto out;
 614
 615                 create_options |= OPEN_REPARSE_POINT;
 616                 /* Failed on a symbolic link - query a reparse point info */
 617                 cifs_get_readable_path(tcon, full_path, &cfile);
 618                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 619                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 620                                       create_options, ACL_NO_MODE, data,
 621                                       SMB2_OP_QUERY_INFO, cfile, NULL, NULL,
 622                                       NULL, NULL);
 623                 break;
 624         case -EREMOTE:
 625                 break;
 626         default:
 627                 if (hdr->Status != STATUS_OBJECT_NAME_INVALID)
 628                         break;
 629                 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
 630                                                      full_path, &islink);
 631                 if (rc2) {
 632                         rc = rc2;
 633                         goto out;
 634                 }
 635                 if (islink)
 636                         rc = -EREMOTE;
 637         }
 638
 639 out:
 640         free_rsp_buf(out_buftype[0], out_iov[0].iov_base);
 641         free_rsp_buf(out_buftype[1], out_iov[1].iov_base);
 642         free_rsp_buf(out_buftype[2], out_iov[2].iov_base);
 643         return rc;
 644 }
 645
 646 int smb311_posix_query_path_info(const unsigned int xid,
 647                                  struct cifs_tcon *tcon,
 648                                  struct cifs_sb_info *cifs_sb,
 649                                  const char *full_path,
 650                                  struct cifs_open_info_data *data,
 651                                  struct cifs_sid *owner,
 652                                  struct cifs_sid *group)
 653 {
 654         int rc;
 655         __u32 create_options = 0;
 656         struct cifsFileInfo *cfile;
 657         struct kvec out_iov[3] = {};
 658         int out_buftype[3] = {};
 659         __u8 *sidsbuf = NULL;
 660         __u8 *sidsbuf_end = NULL;
 661         size_t sidsbuflen = 0;
 662         size_t owner_len, group_len;
 663
 664         data->adjust_tz = false;
 665         data->reparse_point = false;
 666
 667         /*
 668          * BB TODO: Add support for using the cached root handle.
 669          * Create SMB2_query_posix_info worker function to do non-compounded query
 670          * when we already have an open file handle for this. For now this is fast enough
 671          * (always using the compounded version).
 672          */
 673
 674         cifs_get_readable_path(tcon, full_path, &cfile);
 675         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN,
 676                               create_options, ACL_NO_MODE, data, SMB2_OP_POSIX_QUERY_INFO, cfile,
 677                               &sidsbuf, &sidsbuflen, out_iov, out_buftype);
 678         /*
 679          * If first iov is unset, then SMB session was dropped or we've got a
 680          * cached open file (@cfile).
 681          */
 682         if (!out_iov[0].iov_base || out_buftype[0] == CIFS_NO_BUFFER)
 683                 goto out;
 684
 685         switch (rc) {
 686         case 0:
 687         case -EOPNOTSUPP:
 688                 /* BB TODO: When support for special files added to Samba re-verify this path */
 689                 rc = parse_create_response(data, cifs_sb, &out_iov[0]);
 690                 if (rc || !data->reparse_point)
 691                         goto out;
 692
 693                 create_options |= OPEN_REPARSE_POINT;
 694                 /* Failed on a symbolic link - query a reparse point info */
 695                 cifs_get_readable_path(tcon, full_path, &cfile);
 696                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES,
 697                                       FILE_OPEN, create_options, ACL_NO_MODE, data,
 698                                       SMB2_OP_POSIX_QUERY_INFO, cfile,
 699                                       &sidsbuf, &sidsbuflen, NULL, NULL);
 700                 break;
 701         }
 702
 703 out:
 704         if (rc == 0) {
 705                 sidsbuf_end = sidsbuf + sidsbuflen;
 706
 707                 owner_len = posix_info_sid_size(sidsbuf, sidsbuf_end);
 708                 if (owner_len == -1) {
 709                         rc = -EINVAL;
 710                         goto out;
 711                 }
 712                 memcpy(owner, sidsbuf, owner_len);
 713
 714                 group_len = posix_info_sid_size(
 715                         sidsbuf + owner_len, sidsbuf_end);
 716                 if (group_len == -1) {
 717                         rc = -EINVAL;
 718                         goto out;
 719                 }
 720                 memcpy(group, sidsbuf + owner_len, group_len);
 721         }
 722
 723         kfree(sidsbuf);
 724         free_rsp_buf(out_buftype[0], out_iov[0].iov_base);
 725         free_rsp_buf(out_buftype[1], out_iov[1].iov_base);
 726         free_rsp_buf(out_buftype[2], out_iov[2].iov_base);
 727         return rc;
 728 }
 729
 730 int
 731 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
 732            struct cifs_tcon *tcon, const char *name,
 733            struct cifs_sb_info *cifs_sb)
 734 {
 735         return smb2_compound_op(xid, tcon, cifs_sb, name,
 736                                 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 737                                 CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR,
 738                                 NULL, NULL, NULL, NULL, NULL);
 739 }
 740
 741 void
 742 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 743                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 744                    const unsigned int xid)
 745 {
 746         FILE_BASIC_INFO data;
 747         struct cifsInodeInfo *cifs_i;
 748         struct cifsFileInfo *cfile;
 749         u32 dosattrs;
 750         int tmprc;
 751
 752         memset(&data, 0, sizeof(data));
 753         cifs_i = CIFS_I(inode);
 754         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 755         data.Attributes = cpu_to_le32(dosattrs);
 756         cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
 757         tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
 758                                  FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 759                                  CREATE_NOT_FILE, ACL_NO_MODE,
 760                                  &data, SMB2_OP_SET_INFO, cfile, NULL, NULL, NULL, NULL);
 761         if (tmprc == 0)
 762                 cifs_i->cifsAttrs = dosattrs;
 763 }
 764
 765 int
 766 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 767            struct cifs_sb_info *cifs_sb)
 768 {
 769         drop_cached_dir_by_name(xid, tcon, name, cifs_sb);
 770         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 771                                 CREATE_NOT_FILE, ACL_NO_MODE,
 772                                 NULL, SMB2_OP_RMDIR, NULL, NULL, NULL, NULL, NULL);
 773 }
 774
 775 int
 776 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 777             struct cifs_sb_info *cifs_sb)
 778 {
 779         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 780                                 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
 781                                 ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL, NULL, NULL, NULL, NULL);
 782 }
 783
 784 static int
 785 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 786                    const char *from_name, const char *to_name,
 787                    struct cifs_sb_info *cifs_sb, __u32 access, int command,
 788                    struct cifsFileInfo *cfile)
 789 {
 790         __le16 *smb2_to_name = NULL;
 791         int rc;
 792
 793         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 794         if (smb2_to_name == NULL) {
 795                 rc = -ENOMEM;
 796                 goto smb2_rename_path;
 797         }
 798         rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
 799                               FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name,
 800                               command, cfile, NULL, NULL, NULL, NULL);
 801 smb2_rename_path:
 802         kfree(smb2_to_name);
 803         return rc;
 804 }
 805
 806 int
 807 smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
 808                  const char *from_name, const char *to_name,
 809                  struct cifs_sb_info *cifs_sb)
 810 {
 811         struct cifsFileInfo *cfile;
 812
 813         drop_cached_dir_by_name(xid, tcon, from_name, cifs_sb);
 814         cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
 815
 816         return smb2_set_path_attr(xid, tcon, from_name, to_name,
 817                                   cifs_sb, DELETE, SMB2_OP_RENAME, cfile);
 818 }
 819
 820 int
 821 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
 822                      const char *from_name, const char *to_name,
 823                      struct cifs_sb_info *cifs_sb)
 824 {
 825         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 826                                   FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK,
 827                                   NULL);
 828 }
 829
 830 int
 831 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 832                    const char *full_path, __u64 size,
 833                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 834 {
 835         __le64 eof = cpu_to_le64(size);
 836         struct cifsFileInfo *cfile;
 837
 838         cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 839         return smb2_compound_op(xid, tcon, cifs_sb, full_path,
 840                                 FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE,
 841                                 &eof, SMB2_OP_SET_EOF, cfile, NULL, NULL, NULL, NULL);
 842 }
 843
 844 int
 845 smb2_set_file_info(struct inode *inode, const char *full_path,
 846                    FILE_BASIC_INFO *buf, const unsigned int xid)
 847 {
 848         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 849         struct tcon_link *tlink;
 850         struct cifs_tcon *tcon;
 851         struct cifsFileInfo *cfile;
 852         int rc;
 853
 854         if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
 855             (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
 856             (buf->Attributes == 0))
 857                 return 0; /* would be a no op, no sense sending this */
 858
 859         tlink = cifs_sb_tlink(cifs_sb);
 860         if (IS_ERR(tlink))
 861                 return PTR_ERR(tlink);
 862         tcon = tlink_tcon(tlink);
 863
 864         cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 865         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 866                               FILE_WRITE_ATTRIBUTES, FILE_OPEN,
 867                               0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, cfile,
 868                               NULL, NULL, NULL, NULL);
 869         cifs_put_tlink(tlink);
 870         return rc;
 871 }