fs/cifs/smb2inode.c

   1 // SPDX-License-Identifier: LGPL-2.1
   2 /*
   3  *   fs/cifs/smb2inode.c
   4  *
   5  *   Copyright (C) International Business Machines  Corp., 2002, 2011
   6  *                 Etersoft, 2012
   7  *   Author(s): Pavel Shilovsky (pshilovsky@samba.org),
   8  *              Steve French (sfrench@us.ibm.com)
   9  *
  10  */
  11 #include <linux/fs.h>
  12 #include <linux/stat.h>
  13 #include <linux/slab.h>
  14 #include <linux/pagemap.h>
  15 #include <asm/div64.h>
  16 #include "cifsfs.h"
  17 #include "cifspdu.h"
  18 #include "cifsglob.h"
  19 #include "cifsproto.h"
  20 #include "cifs_debug.h"
  21 #include "cifs_fs_sb.h"
  22 #include "cifs_unicode.h"
  23 #include "fscache.h"
  24 #include "smb2glob.h"
  25 #include "smb2pdu.h"
  26 #include "smb2proto.h"
  27
  28 static void
  29 free_set_inf_compound(struct smb_rqst *rqst)
  30 {
  31         if (rqst[1].rq_iov)
  32                 SMB2_set_info_free(&rqst[1]);
  33         if (rqst[2].rq_iov)
  34                 SMB2_close_free(&rqst[2]);
  35 }
  36
  37
  38 struct cop_vars {
  39         struct cifs_open_parms oparms;
  40         struct kvec rsp_iov[3];
  41         struct smb_rqst rqst[3];
  42         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
  43         struct kvec qi_iov[1];
  44         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
  45         struct kvec close_iov[1];
  46         struct smb2_file_rename_info rename_info;
  47         struct smb2_file_link_info link_info;
  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         struct cop_vars *vars = NULL;
  58         struct kvec *rsp_iov;
  59         struct smb_rqst *rqst;
  60         int rc;
  61         __le16 *utf16_path = NULL;
  62         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
  63         struct cifs_fid fid;
  64         struct cifs_ses *ses = tcon->ses;
  65         struct TCP_Server_Info *server;
  66         int num_rqst = 0;
  67         int resp_buftype[3];
  68         struct smb2_query_info_rsp *qi_rsp = NULL;
  69         int flags = 0;
  70         __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
  71         unsigned int size[2];
  72         void *data[2];
  73         int len;
  74
  75         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
  76         if (vars == NULL)
  77                 return -ENOMEM;
  78         rqst = &vars->rqst[0];
  79         rsp_iov = &vars->rsp_iov[0];
  80
  81         server = cifs_pick_channel(ses);
  82
  83         if (smb3_encryption_required(tcon))
  84                 flags |= CIFS_TRANSFORM_REQ;
  85
  86         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
  87
  88         /* We already have a handle so we can skip the open */
  89         if (cfile)
  90                 goto after_open;
  91
  92         /* Open */
  93         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
  94         if (!utf16_path) {
  95                 rc = -ENOMEM;
  96                 goto finished;
  97         }
  98
  99         vars->oparms.tcon = tcon;
 100         vars->oparms.desired_access = desired_access;
 101         vars->oparms.disposition = create_disposition;
 102         vars->oparms.create_options = cifs_create_options(cifs_sb, create_options);
 103         vars->oparms.fid = &fid;
 104         vars->oparms.reconnect = false;
 105         vars->oparms.mode = mode;
 106         vars->oparms.cifs_sb = cifs_sb;
 107
 108         rqst[num_rqst].rq_iov = &vars->open_iov[0];
 109         rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
 110         rc = SMB2_open_init(tcon, server,
 111                             &rqst[num_rqst], &oplock, &vars->oparms,
 112                             utf16_path);
 113         kfree(utf16_path);
 114         if (rc)
 115                 goto finished;
 116
 117         smb2_set_next_command(tcon, &rqst[num_rqst]);
 118  after_open:
 119         num_rqst++;
 120         rc = 0;
 121
 122         /* Operation */
 123         switch (command) {
 124         case SMB2_OP_QUERY_INFO:
 125                 rqst[num_rqst].rq_iov = &vars->qi_iov[0];
 126                 rqst[num_rqst].rq_nvec = 1;
 127
 128                 if (cfile)
 129                         rc = SMB2_query_info_init(tcon, server,
 130                                 &rqst[num_rqst],
 131                                 cfile->fid.persistent_fid,
 132                                 cfile->fid.volatile_fid,
 133                                 FILE_ALL_INFORMATION,
 134                                 SMB2_O_INFO_FILE, 0,
 135                                 sizeof(struct smb2_file_all_info) +
 136                                           PATH_MAX * 2, 0, NULL);
 137                 else {
 138                         rc = SMB2_query_info_init(tcon, server,
 139                                 &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_POSIX_QUERY_INFO:
 159                 rqst[num_rqst].rq_iov = &vars->qi_iov[0];
 160                 rqst[num_rqst].rq_nvec = 1;
 161
 162                 if (cfile)
 163                         rc = SMB2_query_info_init(tcon, server,
 164                                 &rqst[num_rqst],
 165                                 cfile->fid.persistent_fid,
 166                                 cfile->fid.volatile_fid,
 167                                 SMB_FIND_FILE_POSIX_INFO,
 168                                 SMB2_O_INFO_FILE, 0,
 169                                 /* TBD: fix following to allow for longer SIDs */
 170                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 171                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 172                 else {
 173                         rc = SMB2_query_info_init(tcon, server,
 174                                 &rqst[num_rqst],
 175                                 COMPOUND_FID,
 176                                 COMPOUND_FID,
 177                                 SMB_FIND_FILE_POSIX_INFO,
 178                                 SMB2_O_INFO_FILE, 0,
 179                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 180                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 181                         if (!rc) {
 182                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 183                                 smb2_set_related(&rqst[num_rqst]);
 184                         }
 185                 }
 186
 187                 if (rc)
 188                         goto finished;
 189                 num_rqst++;
 190                 trace_smb3_posix_query_info_compound_enter(xid, ses->Suid, tcon->tid, full_path);
 191                 break;
 192         case SMB2_OP_DELETE:
 193                 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
 194                 break;
 195         case SMB2_OP_MKDIR:
 196                 /*
 197                  * Directories are created through parameters in the
 198                  * SMB2_open() call.
 199                  */
 200                 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
 201                 break;
 202         case SMB2_OP_RMDIR:
 203                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 204                 rqst[num_rqst].rq_nvec = 1;
 205
 206                 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
 207                 data[0] = &delete_pending[0];
 208
 209                 rc = SMB2_set_info_init(tcon, server,
 210                                         &rqst[num_rqst], COMPOUND_FID,
 211                                         COMPOUND_FID, current->tgid,
 212                                         FILE_DISPOSITION_INFORMATION,
 213                                         SMB2_O_INFO_FILE, 0, data, size);
 214                 if (rc)
 215                         goto finished;
 216                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 217                 smb2_set_related(&rqst[num_rqst++]);
 218                 trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
 219                 break;
 220         case SMB2_OP_SET_EOF:
 221                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 222                 rqst[num_rqst].rq_nvec = 1;
 223
 224                 size[0] = 8; /* sizeof __le64 */
 225                 data[0] = ptr;
 226
 227                 rc = SMB2_set_info_init(tcon, server,
 228                                         &rqst[num_rqst], COMPOUND_FID,
 229                                         COMPOUND_FID, current->tgid,
 230                                         FILE_END_OF_FILE_INFORMATION,
 231                                         SMB2_O_INFO_FILE, 0, data, size);
 232                 if (rc)
 233                         goto finished;
 234                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 235                 smb2_set_related(&rqst[num_rqst++]);
 236                 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
 237                 break;
 238         case SMB2_OP_SET_INFO:
 239                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 240                 rqst[num_rqst].rq_nvec = 1;
 241
 242
 243                 size[0] = sizeof(FILE_BASIC_INFO);
 244                 data[0] = ptr;
 245
 246                 if (cfile)
 247                         rc = SMB2_set_info_init(tcon, server,
 248                                 &rqst[num_rqst],
 249                                 cfile->fid.persistent_fid,
 250                                 cfile->fid.volatile_fid, current->tgid,
 251                                 FILE_BASIC_INFORMATION,
 252                                 SMB2_O_INFO_FILE, 0, data, size);
 253                 else {
 254                         rc = SMB2_set_info_init(tcon, server,
 255                                 &rqst[num_rqst],
 256                                 COMPOUND_FID,
 257                                 COMPOUND_FID, current->tgid,
 258                                 FILE_BASIC_INFORMATION,
 259                                 SMB2_O_INFO_FILE, 0, data, size);
 260                         if (!rc) {
 261                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 262                                 smb2_set_related(&rqst[num_rqst]);
 263                         }
 264                 }
 265
 266                 if (rc)
 267                         goto finished;
 268                 num_rqst++;
 269                 trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
 270                                                    full_path);
 271                 break;
 272         case SMB2_OP_RENAME:
 273                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 274                 rqst[num_rqst].rq_nvec = 2;
 275
 276                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 277
 278                 vars->rename_info.ReplaceIfExists = 1;
 279                 vars->rename_info.RootDirectory = 0;
 280                 vars->rename_info.FileNameLength = cpu_to_le32(len);
 281
 282                 size[0] = sizeof(struct smb2_file_rename_info);
 283                 data[0] = &vars->rename_info;
 284
 285                 size[1] = len + 2 /* null */;
 286                 data[1] = (__le16 *)ptr;
 287
 288                 if (cfile)
 289                         rc = SMB2_set_info_init(tcon, server,
 290                                                 &rqst[num_rqst],
 291                                                 cfile->fid.persistent_fid,
 292                                                 cfile->fid.volatile_fid,
 293                                         current->tgid, FILE_RENAME_INFORMATION,
 294                                         SMB2_O_INFO_FILE, 0, data, size);
 295                 else {
 296                         rc = SMB2_set_info_init(tcon, server,
 297                                         &rqst[num_rqst],
 298                                         COMPOUND_FID, COMPOUND_FID,
 299                                         current->tgid, FILE_RENAME_INFORMATION,
 300                                         SMB2_O_INFO_FILE, 0, data, size);
 301                         if (!rc) {
 302                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 303                                 smb2_set_related(&rqst[num_rqst]);
 304                         }
 305                 }
 306                 if (rc)
 307                         goto finished;
 308                 num_rqst++;
 309                 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
 310                 break;
 311         case SMB2_OP_HARDLINK:
 312                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 313                 rqst[num_rqst].rq_nvec = 2;
 314
 315                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 316
 317                 vars->link_info.ReplaceIfExists = 0;
 318                 vars->link_info.RootDirectory = 0;
 319                 vars->link_info.FileNameLength = cpu_to_le32(len);
 320
 321                 size[0] = sizeof(struct smb2_file_link_info);
 322                 data[0] = &vars->link_info;
 323
 324                 size[1] = len + 2 /* null */;
 325                 data[1] = (__le16 *)ptr;
 326
 327                 rc = SMB2_set_info_init(tcon, server,
 328                                         &rqst[num_rqst], COMPOUND_FID,
 329                                         COMPOUND_FID, current->tgid,
 330                                         FILE_LINK_INFORMATION,
 331                                         SMB2_O_INFO_FILE, 0, data, size);
 332                 if (rc)
 333                         goto finished;
 334                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 335                 smb2_set_related(&rqst[num_rqst++]);
 336                 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
 337                 break;
 338         default:
 339                 cifs_dbg(VFS, "Invalid command\n");
 340                 rc = -EINVAL;
 341         }
 342         if (rc)
 343                 goto finished;
 344
 345         /* We already have a handle so we can skip the close */
 346         if (cfile)
 347                 goto after_close;
 348         /* Close */
 349         flags |= CIFS_CP_CREATE_CLOSE_OP;
 350         rqst[num_rqst].rq_iov = &vars->close_iov[0];
 351         rqst[num_rqst].rq_nvec = 1;
 352         rc = SMB2_close_init(tcon, server,
 353                              &rqst[num_rqst], COMPOUND_FID,
 354                              COMPOUND_FID, false);
 355         smb2_set_related(&rqst[num_rqst]);
 356         if (rc)
 357                 goto finished;
 358  after_close:
 359         num_rqst++;
 360
 361         if (cfile) {
 362                 cifsFileInfo_put(cfile);
 363                 cfile = NULL;
 364                 rc = compound_send_recv(xid, ses, server,
 365                                         flags, num_rqst - 2,
 366                                         &rqst[1], &resp_buftype[1],
 367                                         &rsp_iov[1]);
 368         } else
 369                 rc = compound_send_recv(xid, ses, server,
 370                                         flags, num_rqst,
 371                                         rqst, resp_buftype,
 372                                         rsp_iov);
 373
 374  finished:
 375         if (cfile)
 376                 cifsFileInfo_put(cfile);
 377
 378         SMB2_open_free(&rqst[0]);
 379         if (rc == -EREMCHG) {
 380                 pr_warn_once("server share %s deleted\n", tcon->treeName);
 381                 tcon->need_reconnect = true;
 382         }
 383
 384         switch (command) {
 385         case SMB2_OP_QUERY_INFO:
 386                 if (rc == 0) {
 387                         qi_rsp = (struct smb2_query_info_rsp *)
 388                                 rsp_iov[1].iov_base;
 389                         rc = smb2_validate_and_copy_iov(
 390                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 391                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 392                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 393                                 ptr);
 394                 }
 395                 if (rqst[1].rq_iov)
 396                         SMB2_query_info_free(&rqst[1]);
 397                 if (rqst[2].rq_iov)
 398                         SMB2_close_free(&rqst[2]);
 399                 if (rc)
 400                         trace_smb3_query_info_compound_err(xid,  ses->Suid,
 401                                                 tcon->tid, rc);
 402                 else
 403                         trace_smb3_query_info_compound_done(xid, ses->Suid,
 404                                                 tcon->tid);
 405                 break;
 406         case SMB2_OP_POSIX_QUERY_INFO:
 407                 if (rc == 0) {
 408                         qi_rsp = (struct smb2_query_info_rsp *)
 409                                 rsp_iov[1].iov_base;
 410                         rc = smb2_validate_and_copy_iov(
 411                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 412                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 413                                 &rsp_iov[1], sizeof(struct smb311_posix_qinfo) /* add SIDs */, ptr);
 414                 }
 415                 if (rqst[1].rq_iov)
 416                         SMB2_query_info_free(&rqst[1]);
 417                 if (rqst[2].rq_iov)
 418                         SMB2_close_free(&rqst[2]);
 419                 if (rc)
 420                         trace_smb3_posix_query_info_compound_err(xid,  ses->Suid, tcon->tid, rc);
 421                 else
 422                         trace_smb3_posix_query_info_compound_done(xid, ses->Suid, tcon->tid);
 423                 break;
 424         case SMB2_OP_DELETE:
 425                 if (rc)
 426                         trace_smb3_delete_err(xid,  ses->Suid, tcon->tid, rc);
 427                 else
 428                         trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
 429                 if (rqst[1].rq_iov)
 430                         SMB2_close_free(&rqst[1]);
 431                 break;
 432         case SMB2_OP_MKDIR:
 433                 if (rc)
 434                         trace_smb3_mkdir_err(xid,  ses->Suid, tcon->tid, rc);
 435                 else
 436                         trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
 437                 if (rqst[1].rq_iov)
 438                         SMB2_close_free(&rqst[1]);
 439                 break;
 440         case SMB2_OP_HARDLINK:
 441                 if (rc)
 442                         trace_smb3_hardlink_err(xid,  ses->Suid, tcon->tid, rc);
 443                 else
 444                         trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
 445                 free_set_inf_compound(rqst);
 446                 break;
 447         case SMB2_OP_RENAME:
 448                 if (rc)
 449                         trace_smb3_rename_err(xid,  ses->Suid, tcon->tid, rc);
 450                 else
 451                         trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
 452                 free_set_inf_compound(rqst);
 453                 break;
 454         case SMB2_OP_RMDIR:
 455                 if (rc)
 456                         trace_smb3_rmdir_err(xid,  ses->Suid, tcon->tid, rc);
 457                 else
 458                         trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
 459                 free_set_inf_compound(rqst);
 460                 break;
 461         case SMB2_OP_SET_EOF:
 462                 if (rc)
 463                         trace_smb3_set_eof_err(xid,  ses->Suid, tcon->tid, rc);
 464                 else
 465                         trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
 466                 free_set_inf_compound(rqst);
 467                 break;
 468         case SMB2_OP_SET_INFO:
 469                 if (rc)
 470                         trace_smb3_set_info_compound_err(xid,  ses->Suid,
 471                                                 tcon->tid, rc);
 472                 else
 473                         trace_smb3_set_info_compound_done(xid, ses->Suid,
 474                                                 tcon->tid);
 475                 free_set_inf_compound(rqst);
 476                 break;
 477         }
 478         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 479         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 480         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
 481         kfree(vars);
 482         return rc;
 483 }
 484
 485 void
 486 move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
 487 {
 488         memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
 489         dst->CurrentByteOffset = src->CurrentByteOffset;
 490         dst->Mode = src->Mode;
 491         dst->AlignmentRequirement = src->AlignmentRequirement;
 492         dst->IndexNumber1 = 0; /* we don't use it */
 493 }
 494
 495 int
 496 smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 497                      struct cifs_sb_info *cifs_sb, const char *full_path,
 498                      FILE_ALL_INFO *data, bool *adjust_tz, bool *reparse)
 499 {
 500         int rc;
 501         struct smb2_file_all_info *smb2_data;
 502         __u32 create_options = 0;
 503         struct cifsFileInfo *cfile;
 504         struct cached_fid *cfid = NULL;
 505
 506         *adjust_tz = false;
 507         *reparse = false;
 508
 509         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 510                             GFP_KERNEL);
 511         if (smb2_data == NULL)
 512                 return -ENOMEM;
 513
 514         /* If it is a root and its handle is cached then use it */
 515         rc = open_cached_dir(xid, tcon, full_path, cifs_sb, &cfid);
 516         if (!rc) {
 517                 if (tcon->crfid.file_all_info_is_valid) {
 518                         move_smb2_info_to_cifs(data,
 519                                                &tcon->crfid.file_all_info);
 520                 } else {
 521                         rc = SMB2_query_info(xid, tcon,
 522                                              cfid->fid->persistent_fid,
 523                                              cfid->fid->volatile_fid, smb2_data);
 524                         if (!rc)
 525                                 move_smb2_info_to_cifs(data, smb2_data);
 526                 }
 527                 close_cached_dir(cfid);
 528                 goto out;
 529         }
 530
 531         cifs_get_readable_path(tcon, full_path, &cfile);
 532         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 533                               FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
 534                               ACL_NO_MODE, smb2_data, SMB2_OP_QUERY_INFO, cfile);
 535         if (rc == -EOPNOTSUPP) {
 536                 *reparse = true;
 537                 create_options |= OPEN_REPARSE_POINT;
 538
 539                 /* Failed on a symbolic link - query a reparse point info */
 540                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 541                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 542                                       create_options, ACL_NO_MODE,
 543                                       smb2_data, SMB2_OP_QUERY_INFO, NULL);
 544         }
 545         if (rc)
 546                 goto out;
 547
 548         move_smb2_info_to_cifs(data, smb2_data);
 549 out:
 550         kfree(smb2_data);
 551         return rc;
 552 }
 553
 554
 555 int
 556 smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 557                      struct cifs_sb_info *cifs_sb, const char *full_path,
 558                      struct smb311_posix_qinfo *data, bool *adjust_tz, bool *reparse)
 559 {
 560         int rc;
 561         __u32 create_options = 0;
 562         struct cifsFileInfo *cfile;
 563         struct smb311_posix_qinfo *smb2_data;
 564
 565         *adjust_tz = false;
 566         *reparse = false;
 567
 568         /* BB TODO: Make struct larger when add support for parsing owner SIDs */
 569         smb2_data = kzalloc(sizeof(struct smb311_posix_qinfo),
 570                             GFP_KERNEL);
 571         if (smb2_data == NULL)
 572                 return -ENOMEM;
 573
 574         /*
 575          * BB TODO: Add support for using the cached root handle.
 576          * Create SMB2_query_posix_info worker function to do non-compounded query
 577          * when we already have an open file handle for this. For now this is fast enough
 578          * (always using the compounded version).
 579          */
 580
 581         cifs_get_readable_path(tcon, full_path, &cfile);
 582         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 583                               FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
 584                               ACL_NO_MODE, smb2_data, SMB2_OP_POSIX_QUERY_INFO, cfile);
 585         if (rc == -EOPNOTSUPP) {
 586                 /* BB TODO: When support for special files added to Samba re-verify this path */
 587                 *reparse = true;
 588                 create_options |= OPEN_REPARSE_POINT;
 589
 590                 /* Failed on a symbolic link - query a reparse point info */
 591                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 592                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 593                                       create_options, ACL_NO_MODE,
 594                                       smb2_data, SMB2_OP_POSIX_QUERY_INFO, NULL);
 595         }
 596         if (rc)
 597                 goto out;
 598
 599          /* TODO: will need to allow for the 2 SIDs when add support for getting owner UID/GID */
 600         memcpy(data, smb2_data, sizeof(struct smb311_posix_qinfo));
 601
 602 out:
 603         kfree(smb2_data);
 604         return rc;
 605 }
 606
 607 int
 608 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
 609            struct cifs_tcon *tcon, const char *name,
 610            struct cifs_sb_info *cifs_sb)
 611 {
 612         return smb2_compound_op(xid, tcon, cifs_sb, name,
 613                                 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 614                                 CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR,
 615                                 NULL);
 616 }
 617
 618 void
 619 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 620                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 621                    const unsigned int xid)
 622 {
 623         FILE_BASIC_INFO data;
 624         struct cifsInodeInfo *cifs_i;
 625         struct cifsFileInfo *cfile;
 626         u32 dosattrs;
 627         int tmprc;
 628
 629         memset(&data, 0, sizeof(data));
 630         cifs_i = CIFS_I(inode);
 631         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 632         data.Attributes = cpu_to_le32(dosattrs);
 633         cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
 634         tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
 635                                  FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 636                                  CREATE_NOT_FILE, ACL_NO_MODE,
 637                                  &data, SMB2_OP_SET_INFO, cfile);
 638         if (tmprc == 0)
 639                 cifs_i->cifsAttrs = dosattrs;
 640 }
 641
 642 int
 643 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 644            struct cifs_sb_info *cifs_sb)
 645 {
 646         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 647                                 CREATE_NOT_FILE, ACL_NO_MODE,
 648                                 NULL, SMB2_OP_RMDIR, NULL);
 649 }
 650
 651 int
 652 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 653             struct cifs_sb_info *cifs_sb)
 654 {
 655         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 656                                 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
 657                                 ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL);
 658 }
 659
 660 static int
 661 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 662                    const char *from_name, const char *to_name,
 663                    struct cifs_sb_info *cifs_sb, __u32 access, int command,
 664                    struct cifsFileInfo *cfile)
 665 {
 666         __le16 *smb2_to_name = NULL;
 667         int rc;
 668
 669         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 670         if (smb2_to_name == NULL) {
 671                 rc = -ENOMEM;
 672                 goto smb2_rename_path;
 673         }
 674         rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
 675                               FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name,
 676                               command, cfile);
 677 smb2_rename_path:
 678         kfree(smb2_to_name);
 679         return rc;
 680 }
 681
 682 int
 683 smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
 684                  const char *from_name, const char *to_name,
 685                  struct cifs_sb_info *cifs_sb)
 686 {
 687         struct cifsFileInfo *cfile;
 688
 689         cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
 690
 691         return smb2_set_path_attr(xid, tcon, from_name, to_name,
 692                                   cifs_sb, DELETE, SMB2_OP_RENAME, cfile);
 693 }
 694
 695 int
 696 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
 697                      const char *from_name, const char *to_name,
 698                      struct cifs_sb_info *cifs_sb)
 699 {
 700         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 701                                   FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK,
 702                                   NULL);
 703 }
 704
 705 int
 706 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 707                    const char *full_path, __u64 size,
 708                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 709 {
 710         __le64 eof = cpu_to_le64(size);
 711
 712         return smb2_compound_op(xid, tcon, cifs_sb, full_path,
 713                                 FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE,
 714                                 &eof, SMB2_OP_SET_EOF, NULL);
 715 }
 716
 717 int
 718 smb2_set_file_info(struct inode *inode, const char *full_path,
 719                    FILE_BASIC_INFO *buf, const unsigned int xid)
 720 {
 721         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 722         struct tcon_link *tlink;
 723         int rc;
 724
 725         if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
 726             (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
 727             (buf->Attributes == 0))
 728                 return 0; /* would be a no op, no sense sending this */
 729
 730         tlink = cifs_sb_tlink(cifs_sb);
 731         if (IS_ERR(tlink))
 732                 return PTR_ERR(tlink);
 733
 734         rc = smb2_compound_op(xid, tlink_tcon(tlink), cifs_sb, full_path,
 735                               FILE_WRITE_ATTRIBUTES, FILE_OPEN,
 736                               0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, NULL);
 737         cifs_put_tlink(tlink);
 738         return rc;
 739 }