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, umode_t mode, void *ptr, int command,
  55                  struct cifsFileInfo *cfile)
  56 {
  57         int rc;
  58         __le16 *utf16_path = NULL;
  59         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
  60         struct cifs_open_parms oparms;
  61         struct cifs_fid fid;
  62         struct cifs_ses *ses = tcon->ses;
  63         int num_rqst = 0;
  64         struct smb_rqst rqst[3];
  65         int resp_buftype[3];
  66         struct kvec rsp_iov[3];
  67         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
  68         struct kvec qi_iov[1];
  69         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
  70         struct kvec close_iov[1];
  71         struct smb2_query_info_rsp *qi_rsp = NULL;
  72         int flags = 0;
  73         __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
  74         unsigned int size[2];
  75         void *data[2];
  76         struct smb2_file_rename_info rename_info;
  77         struct smb2_file_link_info link_info;
  78         int len;
  79
  80         if (smb3_encryption_required(tcon))
  81                 flags |= CIFS_TRANSFORM_REQ;
  82
  83         memset(rqst, 0, sizeof(rqst));
  84         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
  85         memset(rsp_iov, 0, sizeof(rsp_iov));
  86
  87         /* We already have a handle so we can skip the open */
  88         if (cfile)
  89                 goto after_open;
  90
  91         /* Open */
  92         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
  93         if (!utf16_path) {
  94                 rc = -ENOMEM;
  95                 goto finished;
  96         }
  97
  98         oparms.tcon = tcon;
  99         oparms.desired_access = desired_access;
 100         oparms.disposition = create_disposition;
 101         oparms.create_options = cifs_create_options(cifs_sb, create_options);
 102         oparms.fid = &fid;
 103         oparms.reconnect = false;
 104         oparms.mode = mode;
 105
 106         memset(&open_iov, 0, sizeof(open_iov));
 107         rqst[num_rqst].rq_iov = open_iov;
 108         rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
 109         rc = SMB2_open_init(tcon, &rqst[num_rqst], &oplock, &oparms,
 110                             utf16_path);
 111         kfree(utf16_path);
 112         if (rc)
 113                 goto finished;
 114
 115         smb2_set_next_command(tcon, &rqst[num_rqst]);
 116  after_open:
 117         num_rqst++;
 118         rc = 0;
 119
 120         /* Operation */
 121         switch (command) {
 122         case SMB2_OP_QUERY_INFO:
 123                 memset(&qi_iov, 0, sizeof(qi_iov));
 124                 rqst[num_rqst].rq_iov = qi_iov;
 125                 rqst[num_rqst].rq_nvec = 1;
 126
 127                 if (cfile)
 128                         rc = SMB2_query_info_init(tcon, &rqst[num_rqst],
 129                                 cfile->fid.persistent_fid,
 130                                 cfile->fid.volatile_fid,
 131                                 FILE_ALL_INFORMATION,
 132                                 SMB2_O_INFO_FILE, 0,
 133                                 sizeof(struct smb2_file_all_info) +
 134                                           PATH_MAX * 2, 0, NULL);
 135                 else {
 136                         rc = SMB2_query_info_init(tcon, &rqst[num_rqst],
 137                                 COMPOUND_FID,
 138                                 COMPOUND_FID,
 139                                  FILE_ALL_INFORMATION,
 140                                 SMB2_O_INFO_FILE, 0,
 141                                 sizeof(struct smb2_file_all_info) +
 142                                           PATH_MAX * 2, 0, NULL);
 143                         if (!rc) {
 144                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 145                                 smb2_set_related(&rqst[num_rqst]);
 146                         }
 147                 }
 148
 149                 if (rc)
 150                         goto finished;
 151                 num_rqst++;
 152                 trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
 153                                                      full_path);
 154                 break;
 155         case SMB2_OP_DELETE:
 156                 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
 157                 break;
 158         case SMB2_OP_MKDIR:
 159                 /*
 160                  * Directories are created through parameters in the
 161                  * SMB2_open() call.
 162                  */
 163                 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
 164                 break;
 165         case SMB2_OP_RMDIR:
 166                 memset(&si_iov, 0, sizeof(si_iov));
 167                 rqst[num_rqst].rq_iov = si_iov;
 168                 rqst[num_rqst].rq_nvec = 1;
 169
 170                 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
 171                 data[0] = &delete_pending[0];
 172
 173                 rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
 174                                         COMPOUND_FID, current->tgid,
 175                                         FILE_DISPOSITION_INFORMATION,
 176                                         SMB2_O_INFO_FILE, 0, data, size);
 177                 if (rc)
 178                         goto finished;
 179                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 180                 smb2_set_related(&rqst[num_rqst++]);
 181                 trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
 182                 break;
 183         case SMB2_OP_SET_EOF:
 184                 memset(&si_iov, 0, sizeof(si_iov));
 185                 rqst[num_rqst].rq_iov = si_iov;
 186                 rqst[num_rqst].rq_nvec = 1;
 187
 188                 size[0] = 8; /* sizeof __le64 */
 189                 data[0] = ptr;
 190
 191                 rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
 192                                         COMPOUND_FID, current->tgid,
 193                                         FILE_END_OF_FILE_INFORMATION,
 194                                         SMB2_O_INFO_FILE, 0, data, size);
 195                 if (rc)
 196                         goto finished;
 197                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 198                 smb2_set_related(&rqst[num_rqst++]);
 199                 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
 200                 break;
 201         case SMB2_OP_SET_INFO:
 202                 memset(&si_iov, 0, sizeof(si_iov));
 203                 rqst[num_rqst].rq_iov = si_iov;
 204                 rqst[num_rqst].rq_nvec = 1;
 205
 206
 207                 size[0] = sizeof(FILE_BASIC_INFO);
 208                 data[0] = ptr;
 209
 210                 if (cfile)
 211                         rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
 212                                 cfile->fid.persistent_fid,
 213                                 cfile->fid.volatile_fid, current->tgid,
 214                                 FILE_BASIC_INFORMATION,
 215                                 SMB2_O_INFO_FILE, 0, data, size);
 216                 else {
 217                         rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
 218                                 COMPOUND_FID,
 219                                 COMPOUND_FID, current->tgid,
 220                                 FILE_BASIC_INFORMATION,
 221                                 SMB2_O_INFO_FILE, 0, data, size);
 222                         if (!rc) {
 223                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 224                                 smb2_set_related(&rqst[num_rqst]);
 225                         }
 226                 }
 227
 228                 if (rc)
 229                         goto finished;
 230                 num_rqst++;
 231                 trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
 232                                                    full_path);
 233                 break;
 234         case SMB2_OP_RENAME:
 235                 memset(&si_iov, 0, sizeof(si_iov));
 236                 rqst[num_rqst].rq_iov = si_iov;
 237                 rqst[num_rqst].rq_nvec = 2;
 238
 239                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 240
 241                 rename_info.ReplaceIfExists = 1;
 242                 rename_info.RootDirectory = 0;
 243                 rename_info.FileNameLength = cpu_to_le32(len);
 244
 245                 size[0] = sizeof(struct smb2_file_rename_info);
 246                 data[0] = &rename_info;
 247
 248                 size[1] = len + 2 /* null */;
 249                 data[1] = (__le16 *)ptr;
 250
 251                 if (cfile)
 252                         rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
 253                                                 cfile->fid.persistent_fid,
 254                                                 cfile->fid.volatile_fid,
 255                                         current->tgid, FILE_RENAME_INFORMATION,
 256                                         SMB2_O_INFO_FILE, 0, data, size);
 257                 else {
 258                         rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
 259                                         COMPOUND_FID, COMPOUND_FID,
 260                                         current->tgid, FILE_RENAME_INFORMATION,
 261                                         SMB2_O_INFO_FILE, 0, data, size);
 262                         if (!rc) {
 263                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 264                                 smb2_set_related(&rqst[num_rqst]);
 265                         }
 266                 }
 267                 if (rc)
 268                         goto finished;
 269                 num_rqst++;
 270                 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
 271                 break;
 272         case SMB2_OP_HARDLINK:
 273                 memset(&si_iov, 0, sizeof(si_iov));
 274                 rqst[num_rqst].rq_iov = si_iov;
 275                 rqst[num_rqst].rq_nvec = 2;
 276
 277                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 278
 279                 link_info.ReplaceIfExists = 0;
 280                 link_info.RootDirectory = 0;
 281                 link_info.FileNameLength = cpu_to_le32(len);
 282
 283                 size[0] = sizeof(struct smb2_file_link_info);
 284                 data[0] = &link_info;
 285
 286                 size[1] = len + 2 /* null */;
 287                 data[1] = (__le16 *)ptr;
 288
 289                 rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
 290                                         COMPOUND_FID, current->tgid,
 291                                         FILE_LINK_INFORMATION,
 292                                         SMB2_O_INFO_FILE, 0, data, size);
 293                 if (rc)
 294                         goto finished;
 295                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 296                 smb2_set_related(&rqst[num_rqst++]);
 297                 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
 298                 break;
 299         default:
 300                 cifs_dbg(VFS, "Invalid command\n");
 301                 rc = -EINVAL;
 302         }
 303         if (rc)
 304                 goto finished;
 305
 306         /* We already have a handle so we can skip the close */
 307         if (cfile)
 308                 goto after_close;
 309         /* Close */
 310         memset(&close_iov, 0, sizeof(close_iov));
 311         rqst[num_rqst].rq_iov = close_iov;
 312         rqst[num_rqst].rq_nvec = 1;
 313         rc = SMB2_close_init(tcon, &rqst[num_rqst], COMPOUND_FID,
 314                              COMPOUND_FID);
 315         smb2_set_related(&rqst[num_rqst]);
 316         if (rc)
 317                 goto finished;
 318  after_close:
 319         num_rqst++;
 320
 321         if (cfile) {
 322                 cifsFileInfo_put(cfile);
 323                 cfile = NULL;
 324                 rc = compound_send_recv(xid, ses, flags, num_rqst - 2,
 325                                         &rqst[1], &resp_buftype[1],
 326                                         &rsp_iov[1]);
 327         } else
 328                 rc = compound_send_recv(xid, ses, flags, num_rqst,
 329                                         rqst, resp_buftype,
 330                                         rsp_iov);
 331
 332  finished:
 333         if (cfile)
 334                 cifsFileInfo_put(cfile);
 335
 336         SMB2_open_free(&rqst[0]);
 337         if (rc == -EREMCHG) {
 338                 printk_once(KERN_WARNING "server share %s deleted\n",
 339                             tcon->treeName);
 340                 tcon->need_reconnect = true;
 341         }
 342
 343         switch (command) {
 344         case SMB2_OP_QUERY_INFO:
 345                 if (rc == 0) {
 346                         qi_rsp = (struct smb2_query_info_rsp *)
 347                                 rsp_iov[1].iov_base;
 348                         rc = smb2_validate_and_copy_iov(
 349                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 350                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 351                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 352                                 ptr);
 353                 }
 354                 if (rqst[1].rq_iov)
 355                         SMB2_query_info_free(&rqst[1]);
 356                 if (rqst[2].rq_iov)
 357                         SMB2_close_free(&rqst[2]);
 358                 if (rc)
 359                         trace_smb3_query_info_compound_err(xid,  ses->Suid,
 360                                                 tcon->tid, rc);
 361                 else
 362                         trace_smb3_query_info_compound_done(xid, ses->Suid,
 363                                                 tcon->tid);
 364                 break;
 365         case SMB2_OP_DELETE:
 366                 if (rc)
 367                         trace_smb3_delete_err(xid,  ses->Suid, tcon->tid, rc);
 368                 else
 369                         trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
 370                 if (rqst[1].rq_iov)
 371                         SMB2_close_free(&rqst[1]);
 372                 break;
 373         case SMB2_OP_MKDIR:
 374                 if (rc)
 375                         trace_smb3_mkdir_err(xid,  ses->Suid, tcon->tid, rc);
 376                 else
 377                         trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
 378                 if (rqst[1].rq_iov)
 379                         SMB2_close_free(&rqst[1]);
 380                 break;
 381         case SMB2_OP_HARDLINK:
 382                 if (rc)
 383                         trace_smb3_hardlink_err(xid,  ses->Suid, tcon->tid, rc);
 384                 else
 385                         trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
 386                 free_set_inf_compound(rqst);
 387                 break;
 388         case SMB2_OP_RENAME:
 389                 if (rc)
 390                         trace_smb3_rename_err(xid,  ses->Suid, tcon->tid, rc);
 391                 else
 392                         trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
 393                 free_set_inf_compound(rqst);
 394                 break;
 395         case SMB2_OP_RMDIR:
 396                 if (rc)
 397                         trace_smb3_rmdir_err(xid,  ses->Suid, tcon->tid, rc);
 398                 else
 399                         trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
 400                 free_set_inf_compound(rqst);
 401                 break;
 402         case SMB2_OP_SET_EOF:
 403                 if (rc)
 404                         trace_smb3_set_eof_err(xid,  ses->Suid, tcon->tid, rc);
 405                 else
 406                         trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
 407                 free_set_inf_compound(rqst);
 408                 break;
 409         case SMB2_OP_SET_INFO:
 410                 if (rc)
 411                         trace_smb3_set_info_compound_err(xid,  ses->Suid,
 412                                                 tcon->tid, rc);
 413                 else
 414                         trace_smb3_set_info_compound_done(xid, ses->Suid,
 415                                                 tcon->tid);
 416                 free_set_inf_compound(rqst);
 417                 break;
 418         }
 419         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 420         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 421         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
 422         return rc;
 423 }
 424
 425 void
 426 move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
 427 {
 428         memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
 429         dst->CurrentByteOffset = src->CurrentByteOffset;
 430         dst->Mode = src->Mode;
 431         dst->AlignmentRequirement = src->AlignmentRequirement;
 432         dst->IndexNumber1 = 0; /* we don't use it */
 433 }
 434
 435 int
 436 smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 437                      struct cifs_sb_info *cifs_sb, const char *full_path,
 438                      FILE_ALL_INFO *data, bool *adjust_tz, bool *symlink)
 439 {
 440         int rc;
 441         struct smb2_file_all_info *smb2_data;
 442         __u32 create_options = 0;
 443         struct cifs_fid fid;
 444         bool no_cached_open = tcon->nohandlecache;
 445         struct cifsFileInfo *cfile;
 446
 447         *adjust_tz = false;
 448         *symlink = false;
 449
 450         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 451                             GFP_KERNEL);
 452         if (smb2_data == NULL)
 453                 return -ENOMEM;
 454
 455         /* If it is a root and its handle is cached then use it */
 456         if (!strlen(full_path) && !no_cached_open) {
 457                 rc = open_shroot(xid, tcon, cifs_sb, &fid);
 458                 if (rc)
 459                         goto out;
 460
 461                 if (tcon->crfid.file_all_info_is_valid) {
 462                         move_smb2_info_to_cifs(data,
 463                                                &tcon->crfid.file_all_info);
 464                 } else {
 465                         rc = SMB2_query_info(xid, tcon, fid.persistent_fid,
 466                                              fid.volatile_fid, smb2_data);
 467                         if (!rc)
 468                                 move_smb2_info_to_cifs(data, smb2_data);
 469                 }
 470                 close_shroot(&tcon->crfid);
 471                 goto out;
 472         }
 473
 474         cifs_get_readable_path(tcon, full_path, &cfile);
 475         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 476                               FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
 477                               ACL_NO_MODE, smb2_data, SMB2_OP_QUERY_INFO, cfile);
 478         if (rc == -EOPNOTSUPP) {
 479                 *symlink = true;
 480                 create_options |= OPEN_REPARSE_POINT;
 481
 482                 /* Failed on a symbolic link - query a reparse point info */
 483                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 484                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 485                                       create_options, ACL_NO_MODE,
 486                                       smb2_data, SMB2_OP_QUERY_INFO, NULL);
 487         }
 488         if (rc)
 489                 goto out;
 490
 491         move_smb2_info_to_cifs(data, smb2_data);
 492 out:
 493         kfree(smb2_data);
 494         return rc;
 495 }
 496
 497 int
 498 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
 499            struct cifs_tcon *tcon, const char *name,
 500            struct cifs_sb_info *cifs_sb)
 501 {
 502         return smb2_compound_op(xid, tcon, cifs_sb, name,
 503                                 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 504                                 CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR,
 505                                 NULL);
 506 }
 507
 508 void
 509 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 510                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 511                    const unsigned int xid)
 512 {
 513         FILE_BASIC_INFO data;
 514         struct cifsInodeInfo *cifs_i;
 515         struct cifsFileInfo *cfile;
 516         u32 dosattrs;
 517         int tmprc;
 518
 519         memset(&data, 0, sizeof(data));
 520         cifs_i = CIFS_I(inode);
 521         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 522         data.Attributes = cpu_to_le32(dosattrs);
 523         cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
 524         tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
 525                                  FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 526                                  CREATE_NOT_FILE, ACL_NO_MODE,
 527                                  &data, SMB2_OP_SET_INFO, cfile);
 528         if (tmprc == 0)
 529                 cifs_i->cifsAttrs = dosattrs;
 530 }
 531
 532 int
 533 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 534            struct cifs_sb_info *cifs_sb)
 535 {
 536         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 537                                 CREATE_NOT_FILE, ACL_NO_MODE,
 538                                 NULL, SMB2_OP_RMDIR, NULL);
 539 }
 540
 541 int
 542 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 543             struct cifs_sb_info *cifs_sb)
 544 {
 545         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 546                                 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
 547                                 ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL);
 548 }
 549
 550 static int
 551 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 552                    const char *from_name, const char *to_name,
 553                    struct cifs_sb_info *cifs_sb, __u32 access, int command,
 554                    struct cifsFileInfo *cfile)
 555 {
 556         __le16 *smb2_to_name = NULL;
 557         int rc;
 558
 559         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 560         if (smb2_to_name == NULL) {
 561                 rc = -ENOMEM;
 562                 goto smb2_rename_path;
 563         }
 564         rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
 565                               FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name,
 566                               command, cfile);
 567 smb2_rename_path:
 568         kfree(smb2_to_name);
 569         return rc;
 570 }
 571
 572 int
 573 smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
 574                  const char *from_name, const char *to_name,
 575                  struct cifs_sb_info *cifs_sb)
 576 {
 577         struct cifsFileInfo *cfile;
 578
 579         cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
 580
 581         return smb2_set_path_attr(xid, tcon, from_name, to_name,
 582                                   cifs_sb, DELETE, SMB2_OP_RENAME, cfile);
 583 }
 584
 585 int
 586 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
 587                      const char *from_name, const char *to_name,
 588                      struct cifs_sb_info *cifs_sb)
 589 {
 590         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 591                                   FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK,
 592                                   NULL);
 593 }
 594
 595 int
 596 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 597                    const char *full_path, __u64 size,
 598                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 599 {
 600         __le64 eof = cpu_to_le64(size);
 601
 602         return smb2_compound_op(xid, tcon, cifs_sb, full_path,
 603                                 FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE,
 604                                 &eof, SMB2_OP_SET_EOF, NULL);
 605 }
 606
 607 int
 608 smb2_set_file_info(struct inode *inode, const char *full_path,
 609                    FILE_BASIC_INFO *buf, const unsigned int xid)
 610 {
 611         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 612         struct tcon_link *tlink;
 613         int rc;
 614
 615         if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
 616             (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
 617             (buf->Attributes == 0))
 618                 return 0; /* would be a no op, no sense sending this */
 619
 620         tlink = cifs_sb_tlink(cifs_sb);
 621         if (IS_ERR(tlink))
 622                 return PTR_ERR(tlink);
 623
 624         rc = smb2_compound_op(xid, tlink_tcon(tlink), cifs_sb, full_path,
 625                               FILE_WRITE_ATTRIBUTES, FILE_OPEN,
 626                               0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, NULL);
 627         cifs_put_tlink(tlink);
 628         return rc;
 629 }