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         memset(&oparms, 0, sizeof(struct cifs_open_parms));
  99         oparms.tcon = tcon;
 100         oparms.desired_access = desired_access;
 101         oparms.disposition = create_disposition;
 102         oparms.create_options = create_options;
 103         if (backup_cred(cifs_sb))
 104                 oparms.create_options |= CREATE_OPEN_BACKUP_INTENT;
 105         oparms.fid = &fid;
 106         oparms.reconnect = false;
 107         oparms.mode = mode;
 108
 109         memset(&open_iov, 0, sizeof(open_iov));
 110         rqst[num_rqst].rq_iov = open_iov;
 111         rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
 112         rc = SMB2_open_init(tcon, &rqst[num_rqst], &oplock, &oparms,
 113                             utf16_path);
 114         kfree(utf16_path);
 115         if (rc)
 116                 goto finished;
 117
 118         smb2_set_next_command(tcon, &rqst[num_rqst]);
 119  after_open:
 120         num_rqst++;
 121         rc = 0;
 122
 123         /* Operation */
 124         switch (command) {
 125         case SMB2_OP_QUERY_INFO:
 126                 memset(&qi_iov, 0, sizeof(qi_iov));
 127                 rqst[num_rqst].rq_iov = qi_iov;
 128                 rqst[num_rqst].rq_nvec = 1;
 129
 130                 if (cfile)
 131                         rc = SMB2_query_info_init(tcon, &rqst[num_rqst],
 132                                 cfile->fid.persistent_fid,
 133                                 cfile->fid.volatile_fid,
 134                                 FILE_ALL_INFORMATION,
 135                                 SMB2_O_INFO_FILE, 0,
 136                                 sizeof(struct smb2_file_all_info) +
 137                                           PATH_MAX * 2, 0, NULL);
 138                 else {
 139                         rc = SMB2_query_info_init(tcon, &rqst[num_rqst],
 140                                 COMPOUND_FID,
 141                                 COMPOUND_FID,
 142                                  FILE_ALL_INFORMATION,
 143                                 SMB2_O_INFO_FILE, 0,
 144                                 sizeof(struct smb2_file_all_info) +
 145                                           PATH_MAX * 2, 0, NULL);
 146                         if (!rc) {
 147                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 148                                 smb2_set_related(&rqst[num_rqst]);
 149                         }
 150                 }
 151
 152                 if (rc)
 153                         goto finished;
 154                 num_rqst++;
 155                 trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
 156                                                      full_path);
 157                 break;
 158         case SMB2_OP_DELETE:
 159                 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
 160                 break;
 161         case SMB2_OP_MKDIR:
 162                 /*
 163                  * Directories are created through parameters in the
 164                  * SMB2_open() call.
 165                  */
 166                 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
 167                 break;
 168         case SMB2_OP_RMDIR:
 169                 memset(&si_iov, 0, sizeof(si_iov));
 170                 rqst[num_rqst].rq_iov = si_iov;
 171                 rqst[num_rqst].rq_nvec = 1;
 172
 173                 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
 174                 data[0] = &delete_pending[0];
 175
 176                 rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
 177                                         COMPOUND_FID, current->tgid,
 178                                         FILE_DISPOSITION_INFORMATION,
 179                                         SMB2_O_INFO_FILE, 0, data, size);
 180                 if (rc)
 181                         goto finished;
 182                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 183                 smb2_set_related(&rqst[num_rqst++]);
 184                 trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
 185                 break;
 186         case SMB2_OP_SET_EOF:
 187                 memset(&si_iov, 0, sizeof(si_iov));
 188                 rqst[num_rqst].rq_iov = si_iov;
 189                 rqst[num_rqst].rq_nvec = 1;
 190
 191                 size[0] = 8; /* sizeof __le64 */
 192                 data[0] = ptr;
 193
 194                 rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
 195                                         COMPOUND_FID, current->tgid,
 196                                         FILE_END_OF_FILE_INFORMATION,
 197                                         SMB2_O_INFO_FILE, 0, data, size);
 198                 if (rc)
 199                         goto finished;
 200                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 201                 smb2_set_related(&rqst[num_rqst++]);
 202                 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
 203                 break;
 204         case SMB2_OP_SET_INFO:
 205                 memset(&si_iov, 0, sizeof(si_iov));
 206                 rqst[num_rqst].rq_iov = si_iov;
 207                 rqst[num_rqst].rq_nvec = 1;
 208
 209
 210                 size[0] = sizeof(FILE_BASIC_INFO);
 211                 data[0] = ptr;
 212
 213                 if (cfile)
 214                         rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
 215                                 cfile->fid.persistent_fid,
 216                                 cfile->fid.volatile_fid, current->tgid,
 217                                 FILE_BASIC_INFORMATION,
 218                                 SMB2_O_INFO_FILE, 0, data, size);
 219                 else {
 220                         rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
 221                                 COMPOUND_FID,
 222                                 COMPOUND_FID, current->tgid,
 223                                 FILE_BASIC_INFORMATION,
 224                                 SMB2_O_INFO_FILE, 0, data, size);
 225                         if (!rc) {
 226                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 227                                 smb2_set_related(&rqst[num_rqst]);
 228                         }
 229                 }
 230
 231                 if (rc)
 232                         goto finished;
 233                 num_rqst++;
 234                 trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
 235                                                    full_path);
 236                 break;
 237         case SMB2_OP_RENAME:
 238                 memset(&si_iov, 0, sizeof(si_iov));
 239                 rqst[num_rqst].rq_iov = si_iov;
 240                 rqst[num_rqst].rq_nvec = 2;
 241
 242                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 243
 244                 rename_info.ReplaceIfExists = 1;
 245                 rename_info.RootDirectory = 0;
 246                 rename_info.FileNameLength = cpu_to_le32(len);
 247
 248                 size[0] = sizeof(struct smb2_file_rename_info);
 249                 data[0] = &rename_info;
 250
 251                 size[1] = len + 2 /* null */;
 252                 data[1] = (__le16 *)ptr;
 253
 254                 if (cfile)
 255                         rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
 256                                                 cfile->fid.persistent_fid,
 257                                                 cfile->fid.volatile_fid,
 258                                         current->tgid, FILE_RENAME_INFORMATION,
 259                                         SMB2_O_INFO_FILE, 0, data, size);
 260                 else {
 261                         rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
 262                                         COMPOUND_FID, COMPOUND_FID,
 263                                         current->tgid, FILE_RENAME_INFORMATION,
 264                                         SMB2_O_INFO_FILE, 0, data, size);
 265                         if (!rc) {
 266                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 267                                 smb2_set_related(&rqst[num_rqst]);
 268                         }
 269                 }
 270                 if (rc)
 271                         goto finished;
 272                 num_rqst++;
 273                 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
 274                 break;
 275         case SMB2_OP_HARDLINK:
 276                 memset(&si_iov, 0, sizeof(si_iov));
 277                 rqst[num_rqst].rq_iov = si_iov;
 278                 rqst[num_rqst].rq_nvec = 2;
 279
 280                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 281
 282                 link_info.ReplaceIfExists = 0;
 283                 link_info.RootDirectory = 0;
 284                 link_info.FileNameLength = cpu_to_le32(len);
 285
 286                 size[0] = sizeof(struct smb2_file_link_info);
 287                 data[0] = &link_info;
 288
 289                 size[1] = len + 2 /* null */;
 290                 data[1] = (__le16 *)ptr;
 291
 292                 rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
 293                                         COMPOUND_FID, current->tgid,
 294                                         FILE_LINK_INFORMATION,
 295                                         SMB2_O_INFO_FILE, 0, data, size);
 296                 if (rc)
 297                         goto finished;
 298                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 299                 smb2_set_related(&rqst[num_rqst++]);
 300                 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
 301                 break;
 302         default:
 303                 cifs_dbg(VFS, "Invalid command\n");
 304                 rc = -EINVAL;
 305         }
 306         if (rc)
 307                 goto finished;
 308
 309         /* We already have a handle so we can skip the close */
 310         if (cfile)
 311                 goto after_close;
 312         /* Close */
 313         memset(&close_iov, 0, sizeof(close_iov));
 314         rqst[num_rqst].rq_iov = close_iov;
 315         rqst[num_rqst].rq_nvec = 1;
 316         rc = SMB2_close_init(tcon, &rqst[num_rqst], COMPOUND_FID,
 317                              COMPOUND_FID, false);
 318         smb2_set_related(&rqst[num_rqst]);
 319         if (rc)
 320                 goto finished;
 321  after_close:
 322         num_rqst++;
 323
 324         if (cfile) {
 325                 cifsFileInfo_put(cfile);
 326                 cfile = NULL;
 327                 rc = compound_send_recv(xid, ses, flags, num_rqst - 2,
 328                                         &rqst[1], &resp_buftype[1],
 329                                         &rsp_iov[1]);
 330         } else
 331                 rc = compound_send_recv(xid, ses, flags, num_rqst,
 332                                         rqst, resp_buftype,
 333                                         rsp_iov);
 334
 335  finished:
 336         if (cfile)
 337                 cifsFileInfo_put(cfile);
 338
 339         SMB2_open_free(&rqst[0]);
 340         if (rc == -EREMCHG) {
 341                 printk_once(KERN_WARNING "server share %s deleted\n",
 342                             tcon->treeName);
 343                 tcon->need_reconnect = true;
 344         }
 345
 346         switch (command) {
 347         case SMB2_OP_QUERY_INFO:
 348                 if (rc == 0) {
 349                         qi_rsp = (struct smb2_query_info_rsp *)
 350                                 rsp_iov[1].iov_base;
 351                         rc = smb2_validate_and_copy_iov(
 352                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 353                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 354                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 355                                 ptr);
 356                 }
 357                 if (rqst[1].rq_iov)
 358                         SMB2_query_info_free(&rqst[1]);
 359                 if (rqst[2].rq_iov)
 360                         SMB2_close_free(&rqst[2]);
 361                 if (rc)
 362                         trace_smb3_query_info_compound_err(xid,  ses->Suid,
 363                                                 tcon->tid, rc);
 364                 else
 365                         trace_smb3_query_info_compound_done(xid, ses->Suid,
 366                                                 tcon->tid);
 367                 break;
 368         case SMB2_OP_DELETE:
 369                 if (rc)
 370                         trace_smb3_delete_err(xid,  ses->Suid, tcon->tid, rc);
 371                 else
 372                         trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
 373                 if (rqst[1].rq_iov)
 374                         SMB2_close_free(&rqst[1]);
 375                 break;
 376         case SMB2_OP_MKDIR:
 377                 if (rc)
 378                         trace_smb3_mkdir_err(xid,  ses->Suid, tcon->tid, rc);
 379                 else
 380                         trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
 381                 if (rqst[1].rq_iov)
 382                         SMB2_close_free(&rqst[1]);
 383                 break;
 384         case SMB2_OP_HARDLINK:
 385                 if (rc)
 386                         trace_smb3_hardlink_err(xid,  ses->Suid, tcon->tid, rc);
 387                 else
 388                         trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
 389                 free_set_inf_compound(rqst);
 390                 break;
 391         case SMB2_OP_RENAME:
 392                 if (rc)
 393                         trace_smb3_rename_err(xid,  ses->Suid, tcon->tid, rc);
 394                 else
 395                         trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
 396                 free_set_inf_compound(rqst);
 397                 break;
 398         case SMB2_OP_RMDIR:
 399                 if (rc)
 400                         trace_smb3_rmdir_err(xid,  ses->Suid, tcon->tid, rc);
 401                 else
 402                         trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
 403                 free_set_inf_compound(rqst);
 404                 break;
 405         case SMB2_OP_SET_EOF:
 406                 if (rc)
 407                         trace_smb3_set_eof_err(xid,  ses->Suid, tcon->tid, rc);
 408                 else
 409                         trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
 410                 free_set_inf_compound(rqst);
 411                 break;
 412         case SMB2_OP_SET_INFO:
 413                 if (rc)
 414                         trace_smb3_set_info_compound_err(xid,  ses->Suid,
 415                                                 tcon->tid, rc);
 416                 else
 417                         trace_smb3_set_info_compound_done(xid, ses->Suid,
 418                                                 tcon->tid);
 419                 free_set_inf_compound(rqst);
 420                 break;
 421         }
 422         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 423         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 424         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
 425         return rc;
 426 }
 427
 428 void
 429 move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
 430 {
 431         memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
 432         dst->CurrentByteOffset = src->CurrentByteOffset;
 433         dst->Mode = src->Mode;
 434         dst->AlignmentRequirement = src->AlignmentRequirement;
 435         dst->IndexNumber1 = 0; /* we don't use it */
 436 }
 437
 438 int
 439 smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 440                      struct cifs_sb_info *cifs_sb, const char *full_path,
 441                      FILE_ALL_INFO *data, bool *adjust_tz, bool *symlink)
 442 {
 443         int rc;
 444         struct smb2_file_all_info *smb2_data;
 445         __u32 create_options = 0;
 446         struct cifs_fid fid;
 447         bool no_cached_open = tcon->nohandlecache;
 448         struct cifsFileInfo *cfile;
 449
 450         *adjust_tz = false;
 451         *symlink = false;
 452
 453         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 454                             GFP_KERNEL);
 455         if (smb2_data == NULL)
 456                 return -ENOMEM;
 457
 458         /* If it is a root and its handle is cached then use it */
 459         if (!strlen(full_path) && !no_cached_open) {
 460                 rc = open_shroot(xid, tcon, &fid);
 461                 if (rc)
 462                         goto out;
 463
 464                 if (tcon->crfid.file_all_info_is_valid) {
 465                         move_smb2_info_to_cifs(data,
 466                                                &tcon->crfid.file_all_info);
 467                 } else {
 468                         rc = SMB2_query_info(xid, tcon, fid.persistent_fid,
 469                                              fid.volatile_fid, smb2_data);
 470                         if (!rc)
 471                                 move_smb2_info_to_cifs(data, smb2_data);
 472                 }
 473                 close_shroot(&tcon->crfid);
 474                 goto out;
 475         }
 476
 477         if (backup_cred(cifs_sb))
 478                 create_options |= CREATE_OPEN_BACKUP_INTENT;
 479
 480         cifs_get_readable_path(tcon, full_path, &cfile);
 481         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 482                               FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
 483                               ACL_NO_MODE, smb2_data, SMB2_OP_QUERY_INFO, cfile);
 484         if (rc == -EOPNOTSUPP) {
 485                 *symlink = true;
 486                 create_options |= OPEN_REPARSE_POINT;
 487
 488                 /* Failed on a symbolic link - query a reparse point info */
 489                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 490                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 491                                       create_options, ACL_NO_MODE,
 492                                       smb2_data, SMB2_OP_QUERY_INFO, NULL);
 493         }
 494         if (rc)
 495                 goto out;
 496
 497         move_smb2_info_to_cifs(data, smb2_data);
 498 out:
 499         kfree(smb2_data);
 500         return rc;
 501 }
 502
 503 int
 504 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
 505            struct cifs_tcon *tcon, const char *name,
 506            struct cifs_sb_info *cifs_sb)
 507 {
 508         return smb2_compound_op(xid, tcon, cifs_sb, name,
 509                                 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 510                                 CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR,
 511                                 NULL);
 512 }
 513
 514 void
 515 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 516                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 517                    const unsigned int xid)
 518 {
 519         FILE_BASIC_INFO data;
 520         struct cifsInodeInfo *cifs_i;
 521         struct cifsFileInfo *cfile;
 522         u32 dosattrs;
 523         int tmprc;
 524
 525         memset(&data, 0, sizeof(data));
 526         cifs_i = CIFS_I(inode);
 527         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 528         data.Attributes = cpu_to_le32(dosattrs);
 529         cifs_get_writable_path(tcon, name, &cfile);
 530         tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
 531                                  FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 532                                  CREATE_NOT_FILE, ACL_NO_MODE,
 533                                  &data, SMB2_OP_SET_INFO, cfile);
 534         if (tmprc == 0)
 535                 cifs_i->cifsAttrs = dosattrs;
 536 }
 537
 538 int
 539 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 540            struct cifs_sb_info *cifs_sb)
 541 {
 542         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 543                                 CREATE_NOT_FILE, ACL_NO_MODE,
 544                                 NULL, SMB2_OP_RMDIR, NULL);
 545 }
 546
 547 int
 548 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 549             struct cifs_sb_info *cifs_sb)
 550 {
 551         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 552                                 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
 553                                 ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL);
 554 }
 555
 556 static int
 557 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 558                    const char *from_name, const char *to_name,
 559                    struct cifs_sb_info *cifs_sb, __u32 access, int command,
 560                    struct cifsFileInfo *cfile)
 561 {
 562         __le16 *smb2_to_name = NULL;
 563         int rc;
 564
 565         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 566         if (smb2_to_name == NULL) {
 567                 rc = -ENOMEM;
 568                 goto smb2_rename_path;
 569         }
 570         rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
 571                               FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name,
 572                               command, cfile);
 573 smb2_rename_path:
 574         kfree(smb2_to_name);
 575         return rc;
 576 }
 577
 578 int
 579 smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
 580                  const char *from_name, const char *to_name,
 581                  struct cifs_sb_info *cifs_sb)
 582 {
 583         struct cifsFileInfo *cfile;
 584
 585         cifs_get_writable_path(tcon, from_name, &cfile);
 586
 587         return smb2_set_path_attr(xid, tcon, from_name, to_name,
 588                                   cifs_sb, DELETE, SMB2_OP_RENAME, cfile);
 589 }
 590
 591 int
 592 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
 593                      const char *from_name, const char *to_name,
 594                      struct cifs_sb_info *cifs_sb)
 595 {
 596         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 597                                   FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK,
 598                                   NULL);
 599 }
 600
 601 int
 602 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 603                    const char *full_path, __u64 size,
 604                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 605 {
 606         __le64 eof = cpu_to_le64(size);
 607
 608         return smb2_compound_op(xid, tcon, cifs_sb, full_path,
 609                                 FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE,
 610                                 &eof, SMB2_OP_SET_EOF, NULL);
 611 }
 612
 613 int
 614 smb2_set_file_info(struct inode *inode, const char *full_path,
 615                    FILE_BASIC_INFO *buf, const unsigned int xid)
 616 {
 617         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 618         struct tcon_link *tlink;
 619         int rc;
 620
 621         if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
 622             (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
 623             (buf->Attributes == 0))
 624                 return 0; /* would be a no op, no sense sending this */
 625
 626         tlink = cifs_sb_tlink(cifs_sb);
 627         if (IS_ERR(tlink))
 628                 return PTR_ERR(tlink);
 629
 630         rc = smb2_compound_op(xid, tlink_tcon(tlink), cifs_sb, full_path,
 631                               FILE_WRITE_ATTRIBUTES, FILE_OPEN,
 632                               0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, NULL);
 633         cifs_put_tlink(tlink);
 634         return rc;
 635 }