fs/cifs/smb2inode.c

   1 /*
   2  *   fs/cifs/smb2inode.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002, 2011
   5  *                 Etersoft, 2012
   6  *   Author(s): Pavel Shilovsky (pshilovsky@samba.org),
   7  *              Steve French (sfrench@us.ibm.com)
   8  *
   9  *   This library is free software; you can redistribute it and/or modify
  10  *   it under the terms of the GNU Lesser General Public License as published
  11  *   by the Free Software Foundation; either version 2.1 of the License, or
  12  *   (at your option) any later version.
  13  *
  14  *   This library is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  17  *   the GNU Lesser General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU Lesser General Public License
  20  *   along with this library; if not, write to the Free Software
  21  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  */
  23 #include <linux/fs.h>
  24 #include <linux/stat.h>
  25 #include <linux/slab.h>
  26 #include <linux/pagemap.h>
  27 #include <asm/div64.h>
  28 #include "cifsfs.h"
  29 #include "cifspdu.h"
  30 #include "cifsglob.h"
  31 #include "cifsproto.h"
  32 #include "cifs_debug.h"
  33 #include "cifs_fs_sb.h"
  34 #include "cifs_unicode.h"
  35 #include "fscache.h"
  36 #include "smb2glob.h"
  37 #include "smb2pdu.h"
  38 #include "smb2proto.h"
  39
  40 static void
  41 free_set_inf_compound(struct smb_rqst *rqst)
  42 {
  43         if (rqst[1].rq_iov)
  44                 SMB2_set_info_free(&rqst[1]);
  45         if (rqst[2].rq_iov)
  46                 SMB2_close_free(&rqst[2]);
  47 }
  48
  49
  50 static int
  51 smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
  52                  struct cifs_sb_info *cifs_sb, const char *full_path,
  53                  __u32 desired_access, __u32 create_disposition,
  54                  __u32 create_options, void *ptr, int command)
  55 {
  56         int rc;
  57         __le16 *utf16_path = NULL;
  58         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
  59         struct cifs_open_parms oparms;
  60         struct cifs_fid fid;
  61         struct cifs_ses *ses = tcon->ses;
  62         int num_rqst = 0;
  63         struct smb_rqst rqst[3];
  64         int resp_buftype[3];
  65         struct kvec rsp_iov[3];
  66         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
  67         struct kvec qi_iov[1];
  68         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
  69         struct kvec close_iov[1];
  70         struct smb2_query_info_rsp *qi_rsp = NULL;
  71         int flags = 0;
  72         __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
  73         unsigned int size[2];
  74         void *data[2];
  75         struct smb2_file_rename_info rename_info;
  76         struct smb2_file_link_info link_info;
  77         int len;
  78
  79         if (smb3_encryption_required(tcon))
  80                 flags |= CIFS_TRANSFORM_REQ;
  81
  82         memset(rqst, 0, sizeof(rqst));
  83         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
  84         memset(rsp_iov, 0, sizeof(rsp_iov));
  85
  86         /* Open */
  87         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
  88         if (!utf16_path)
  89                 return -ENOMEM;
  90
  91         oparms.tcon = tcon;
  92         oparms.desired_access = desired_access;
  93         oparms.disposition = create_disposition;
  94         oparms.create_options = create_options;
  95         if (backup_cred(cifs_sb))
  96                 oparms.create_options |= CREATE_OPEN_BACKUP_INTENT;
  97         oparms.fid = &fid;
  98         oparms.reconnect = false;
  99
 100         memset(&open_iov, 0, sizeof(open_iov));
 101         rqst[num_rqst].rq_iov = open_iov;
 102         rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
 103         rc = SMB2_open_init(tcon, &rqst[num_rqst], &oplock, &oparms,
 104                             utf16_path);
 105         kfree(utf16_path);
 106         if (rc)
 107                 goto finished;
 108
 109         smb2_set_next_command(tcon, &rqst[num_rqst++]);
 110
 111         /* Operation */
 112         switch (command) {
 113         case SMB2_OP_QUERY_INFO:
 114                 memset(&qi_iov, 0, sizeof(qi_iov));
 115                 rqst[num_rqst].rq_iov = qi_iov;
 116                 rqst[num_rqst].rq_nvec = 1;
 117
 118                 rc = SMB2_query_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
 119                                 COMPOUND_FID, FILE_ALL_INFORMATION,
 120                                 SMB2_O_INFO_FILE, 0,
 121                                 sizeof(struct smb2_file_all_info) +
 122                                           PATH_MAX * 2, 0, NULL);
 123                 if (rc)
 124                         goto finished;
 125                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 126                 smb2_set_related(&rqst[num_rqst++]);
 127                 trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
 128                                                      full_path);
 129                 break;
 130         case SMB2_OP_DELETE:
 131                 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
 132                 break;
 133         case SMB2_OP_MKDIR:
 134                 /*
 135                  * Directories are created through parameters in the
 136                  * SMB2_open() call.
 137                  */
 138                 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
 139                 break;
 140         case SMB2_OP_RMDIR:
 141                 memset(&si_iov, 0, sizeof(si_iov));
 142                 rqst[num_rqst].rq_iov = si_iov;
 143                 rqst[num_rqst].rq_nvec = 1;
 144
 145                 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
 146                 data[0] = &delete_pending[0];
 147
 148                 rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
 149                                         COMPOUND_FID, current->tgid,
 150                                         FILE_DISPOSITION_INFORMATION,
 151                                         SMB2_O_INFO_FILE, 0, data, size);
 152                 if (rc)
 153                         goto finished;
 154                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 155                 smb2_set_related(&rqst[num_rqst++]);
 156                 trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
 157                 break;
 158         case SMB2_OP_SET_EOF:
 159                 memset(&si_iov, 0, sizeof(si_iov));
 160                 rqst[num_rqst].rq_iov = si_iov;
 161                 rqst[num_rqst].rq_nvec = 1;
 162
 163                 size[0] = 8; /* sizeof __le64 */
 164                 data[0] = ptr;
 165
 166                 rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
 167                                         COMPOUND_FID, current->tgid,
 168                                         FILE_END_OF_FILE_INFORMATION,
 169                                         SMB2_O_INFO_FILE, 0, data, size);
 170                 if (rc)
 171                         goto finished;
 172                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 173                 smb2_set_related(&rqst[num_rqst++]);
 174                 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
 175                 break;
 176         case SMB2_OP_SET_INFO:
 177                 memset(&si_iov, 0, sizeof(si_iov));
 178                 rqst[num_rqst].rq_iov = si_iov;
 179                 rqst[num_rqst].rq_nvec = 1;
 180
 181
 182                 size[0] = sizeof(FILE_BASIC_INFO);
 183                 data[0] = ptr;
 184
 185                 rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
 186                                         COMPOUND_FID, current->tgid,
 187                                         FILE_BASIC_INFORMATION,
 188                                         SMB2_O_INFO_FILE, 0, data, size);
 189                 if (rc)
 190                         goto finished;
 191                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 192                 smb2_set_related(&rqst[num_rqst++]);
 193                 trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
 194                                                    full_path);
 195                 break;
 196         case SMB2_OP_RENAME:
 197                 memset(&si_iov, 0, sizeof(si_iov));
 198                 rqst[num_rqst].rq_iov = si_iov;
 199                 rqst[num_rqst].rq_nvec = 2;
 200
 201                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 202
 203                 rename_info.ReplaceIfExists = 1;
 204                 rename_info.RootDirectory = 0;
 205                 rename_info.FileNameLength = cpu_to_le32(len);
 206
 207                 size[0] = sizeof(struct smb2_file_rename_info);
 208                 data[0] = &rename_info;
 209
 210                 size[1] = len + 2 /* null */;
 211                 data[1] = (__le16 *)ptr;
 212
 213                 rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
 214                                         COMPOUND_FID, current->tgid,
 215                                         FILE_RENAME_INFORMATION,
 216                                         SMB2_O_INFO_FILE, 0, data, size);
 217                 if (rc)
 218                         goto finished;
 219                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 220                 smb2_set_related(&rqst[num_rqst++]);
 221                 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
 222                 break;
 223         case SMB2_OP_HARDLINK:
 224                 memset(&si_iov, 0, sizeof(si_iov));
 225                 rqst[num_rqst].rq_iov = si_iov;
 226                 rqst[num_rqst].rq_nvec = 2;
 227
 228                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 229
 230                 link_info.ReplaceIfExists = 0;
 231                 link_info.RootDirectory = 0;
 232                 link_info.FileNameLength = cpu_to_le32(len);
 233
 234                 size[0] = sizeof(struct smb2_file_link_info);
 235                 data[0] = &link_info;
 236
 237                 size[1] = len + 2 /* null */;
 238                 data[1] = (__le16 *)ptr;
 239
 240                 rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
 241                                         COMPOUND_FID, current->tgid,
 242                                         FILE_LINK_INFORMATION,
 243                                         SMB2_O_INFO_FILE, 0, data, size);
 244                 if (rc)
 245                         goto finished;
 246                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 247                 smb2_set_related(&rqst[num_rqst++]);
 248                 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
 249                 break;
 250         default:
 251                 cifs_dbg(VFS, "Invalid command\n");
 252                 rc = -EINVAL;
 253         }
 254         if (rc)
 255                 goto finished;
 256
 257         /* Close */
 258         memset(&close_iov, 0, sizeof(close_iov));
 259         rqst[num_rqst].rq_iov = close_iov;
 260         rqst[num_rqst].rq_nvec = 1;
 261         rc = SMB2_close_init(tcon, &rqst[num_rqst], COMPOUND_FID,
 262                              COMPOUND_FID);
 263         smb2_set_related(&rqst[num_rqst++]);
 264         if (rc)
 265                 goto finished;
 266
 267         rc = compound_send_recv(xid, ses, flags, num_rqst, rqst,
 268                                 resp_buftype, rsp_iov);
 269
 270  finished:
 271         SMB2_open_free(&rqst[0]);
 272         switch (command) {
 273         case SMB2_OP_QUERY_INFO:
 274                 if (rc == 0) {
 275                         qi_rsp = (struct smb2_query_info_rsp *)
 276                                 rsp_iov[1].iov_base;
 277                         rc = smb2_validate_and_copy_iov(
 278                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 279                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 280                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 281                                 ptr);
 282                 }
 283                 if (rqst[1].rq_iov)
 284                         SMB2_query_info_free(&rqst[1]);
 285                 if (rqst[2].rq_iov)
 286                         SMB2_close_free(&rqst[2]);
 287                 if (rc)
 288                         trace_smb3_query_info_compound_err(xid,  ses->Suid,
 289                                                 tcon->tid, rc);
 290                 else
 291                         trace_smb3_query_info_compound_done(xid, ses->Suid,
 292                                                 tcon->tid);
 293                 break;
 294         case SMB2_OP_DELETE:
 295                 if (rc)
 296                         trace_smb3_delete_err(xid,  ses->Suid, tcon->tid, rc);
 297                 else
 298                         trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
 299                 if (rqst[1].rq_iov)
 300                         SMB2_close_free(&rqst[1]);
 301                 break;
 302         case SMB2_OP_MKDIR:
 303                 if (rc)
 304                         trace_smb3_mkdir_err(xid,  ses->Suid, tcon->tid, rc);
 305                 else
 306                         trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
 307                 if (rqst[1].rq_iov)
 308                         SMB2_close_free(&rqst[1]);
 309                 break;
 310         case SMB2_OP_HARDLINK:
 311                 if (rc)
 312                         trace_smb3_hardlink_err(xid,  ses->Suid, tcon->tid, rc);
 313                 else
 314                         trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
 315                 free_set_inf_compound(rqst);
 316                 break;
 317         case SMB2_OP_RENAME:
 318                 if (rc)
 319                         trace_smb3_rename_err(xid,  ses->Suid, tcon->tid, rc);
 320                 else
 321                         trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
 322                 free_set_inf_compound(rqst);
 323                 break;
 324         case SMB2_OP_RMDIR:
 325                 if (rc)
 326                         trace_smb3_rmdir_err(xid,  ses->Suid, tcon->tid, rc);
 327                 else
 328                         trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
 329                 free_set_inf_compound(rqst);
 330                 break;
 331         case SMB2_OP_SET_EOF:
 332                 if (rc)
 333                         trace_smb3_set_eof_err(xid,  ses->Suid, tcon->tid, rc);
 334                 else
 335                         trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
 336                 free_set_inf_compound(rqst);
 337                 break;
 338         case SMB2_OP_SET_INFO:
 339                 if (rc)
 340                         trace_smb3_set_info_compound_err(xid,  ses->Suid,
 341                                                 tcon->tid, rc);
 342                 else
 343                         trace_smb3_set_info_compound_done(xid, ses->Suid,
 344                                                 tcon->tid);
 345                 free_set_inf_compound(rqst);
 346                 break;
 347         }
 348         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 349         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 350         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
 351         return rc;
 352 }
 353
 354 void
 355 move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
 356 {
 357         memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
 358         dst->CurrentByteOffset = src->CurrentByteOffset;
 359         dst->Mode = src->Mode;
 360         dst->AlignmentRequirement = src->AlignmentRequirement;
 361         dst->IndexNumber1 = 0; /* we don't use it */
 362 }
 363
 364 int
 365 smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 366                      struct cifs_sb_info *cifs_sb, const char *full_path,
 367                      FILE_ALL_INFO *data, bool *adjust_tz, bool *symlink)
 368 {
 369         int rc;
 370         struct smb2_file_all_info *smb2_data;
 371         __u32 create_options = 0;
 372         struct cifs_fid fid;
 373         bool no_cached_open = tcon->nohandlecache;
 374
 375         *adjust_tz = false;
 376         *symlink = false;
 377
 378         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 379                             GFP_KERNEL);
 380         if (smb2_data == NULL)
 381                 return -ENOMEM;
 382
 383         /* If it is a root and its handle is cached then use it */
 384         if (!strlen(full_path) && !no_cached_open) {
 385                 rc = open_shroot(xid, tcon, &fid);
 386                 if (rc)
 387                         goto out;
 388
 389                 if (tcon->crfid.file_all_info_is_valid) {
 390                         move_smb2_info_to_cifs(data,
 391                                                &tcon->crfid.file_all_info);
 392                 } else {
 393                         rc = SMB2_query_info(xid, tcon, fid.persistent_fid,
 394                                              fid.volatile_fid, smb2_data);
 395                         if (!rc)
 396                                 move_smb2_info_to_cifs(data, smb2_data);
 397                 }
 398                 close_shroot(&tcon->crfid);
 399                 goto out;
 400         }
 401
 402         if (backup_cred(cifs_sb))
 403                 create_options |= CREATE_OPEN_BACKUP_INTENT;
 404
 405         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 406                               FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
 407                               smb2_data, SMB2_OP_QUERY_INFO);
 408         if (rc == -EOPNOTSUPP) {
 409                 *symlink = true;
 410                 create_options |= OPEN_REPARSE_POINT;
 411
 412                 /* Failed on a symbolic link - query a reparse point info */
 413                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 414                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 415                                       create_options, smb2_data,
 416                                       SMB2_OP_QUERY_INFO);
 417         }
 418         if (rc)
 419                 goto out;
 420
 421         move_smb2_info_to_cifs(data, smb2_data);
 422 out:
 423         kfree(smb2_data);
 424         return rc;
 425 }
 426
 427 int
 428 smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 429            struct cifs_sb_info *cifs_sb)
 430 {
 431         return smb2_compound_op(xid, tcon, cifs_sb, name,
 432                                 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 433                                 CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
 434 }
 435
 436 void
 437 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 438                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 439                    const unsigned int xid)
 440 {
 441         FILE_BASIC_INFO data;
 442         struct cifsInodeInfo *cifs_i;
 443         u32 dosattrs;
 444         int tmprc;
 445
 446         memset(&data, 0, sizeof(data));
 447         cifs_i = CIFS_I(inode);
 448         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 449         data.Attributes = cpu_to_le32(dosattrs);
 450         tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
 451                                  FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 452                                  CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
 453         if (tmprc == 0)
 454                 cifs_i->cifsAttrs = dosattrs;
 455 }
 456
 457 int
 458 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 459            struct cifs_sb_info *cifs_sb)
 460 {
 461         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 462                                 CREATE_NOT_FILE,
 463                                 NULL, SMB2_OP_RMDIR);
 464 }
 465
 466 int
 467 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 468             struct cifs_sb_info *cifs_sb)
 469 {
 470         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 471                                 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
 472                                 NULL, SMB2_OP_DELETE);
 473 }
 474
 475 static int
 476 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 477                    const char *from_name, const char *to_name,
 478                    struct cifs_sb_info *cifs_sb, __u32 access, int command)
 479 {
 480         __le16 *smb2_to_name = NULL;
 481         int rc;
 482
 483         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 484         if (smb2_to_name == NULL) {
 485                 rc = -ENOMEM;
 486                 goto smb2_rename_path;
 487         }
 488         rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
 489                               FILE_OPEN, 0, smb2_to_name, command);
 490 smb2_rename_path:
 491         kfree(smb2_to_name);
 492         return rc;
 493 }
 494
 495 int
 496 smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
 497                  const char *from_name, const char *to_name,
 498                  struct cifs_sb_info *cifs_sb)
 499 {
 500         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 501                                   DELETE, SMB2_OP_RENAME);
 502 }
 503
 504 int
 505 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
 506                      const char *from_name, const char *to_name,
 507                      struct cifs_sb_info *cifs_sb)
 508 {
 509         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 510                                   FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
 511 }
 512
 513 int
 514 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 515                    const char *full_path, __u64 size,
 516                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 517 {
 518         __le64 eof = cpu_to_le64(size);
 519
 520         return smb2_compound_op(xid, tcon, cifs_sb, full_path,
 521                                 FILE_WRITE_DATA, FILE_OPEN, 0, &eof,
 522                                 SMB2_OP_SET_EOF);
 523 }
 524
 525 int
 526 smb2_set_file_info(struct inode *inode, const char *full_path,
 527                    FILE_BASIC_INFO *buf, const unsigned int xid)
 528 {
 529         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 530         struct tcon_link *tlink;
 531         int rc;
 532
 533         if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
 534             (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
 535             (buf->Attributes == 0))
 536                 return 0; /* would be a no op, no sense sending this */
 537
 538         tlink = cifs_sb_tlink(cifs_sb);
 539         if (IS_ERR(tlink))
 540                 return PTR_ERR(tlink);
 541
 542         rc = smb2_compound_op(xid, tlink_tcon(tlink), cifs_sb, full_path,
 543                               FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf,
 544                               SMB2_OP_SET_INFO);
 545         cifs_put_tlink(tlink);
 546         return rc;
 547 }