fs/cifs/smb2inode.c

   1 // SPDX-License-Identifier: LGPL-2.1
   2 /*
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002, 2011
   5  *                 Etersoft, 2012
   6  *   Author(s): Pavel Shilovsky (pshilovsky@samba.org),
   7  *              Steve French (sfrench@us.ibm.com)
   8  *
   9  */
  10 #include <linux/fs.h>
  11 #include <linux/stat.h>
  12 #include <linux/slab.h>
  13 #include <linux/pagemap.h>
  14 #include <asm/div64.h>
  15 #include "cifsfs.h"
  16 #include "cifspdu.h"
  17 #include "cifsglob.h"
  18 #include "cifsproto.h"
  19 #include "cifs_debug.h"
  20 #include "cifs_fs_sb.h"
  21 #include "cifs_unicode.h"
  22 #include "fscache.h"
  23 #include "smb2glob.h"
  24 #include "smb2pdu.h"
  25 #include "smb2proto.h"
  26
  27 static void
  28 free_set_inf_compound(struct smb_rqst *rqst)
  29 {
  30         if (rqst[1].rq_iov)
  31                 SMB2_set_info_free(&rqst[1]);
  32         if (rqst[2].rq_iov)
  33                 SMB2_close_free(&rqst[2]);
  34 }
  35
  36
  37 struct cop_vars {
  38         struct cifs_open_parms oparms;
  39         struct kvec rsp_iov[3];
  40         struct smb_rqst rqst[3];
  41         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
  42         struct kvec qi_iov[1];
  43         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
  44         struct kvec close_iov[1];
  45         struct smb2_file_rename_info rename_info;
  46         struct smb2_file_link_info link_info;
  47 };
  48
  49 /*
  50  * note: If cfile is passed, the reference to it is dropped here.
  51  * So make sure that you do not reuse cfile after return from this func.
  52  */
  53 static int
  54 smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
  55                  struct cifs_sb_info *cifs_sb, const char *full_path,
  56                  __u32 desired_access, __u32 create_disposition,
  57                  __u32 create_options, umode_t mode, void *ptr, int command,
  58                  struct cifsFileInfo *cfile)
  59 {
  60         struct cop_vars *vars = NULL;
  61         struct kvec *rsp_iov;
  62         struct smb_rqst *rqst;
  63         int rc;
  64         __le16 *utf16_path = NULL;
  65         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
  66         struct cifs_fid fid;
  67         struct cifs_ses *ses = tcon->ses;
  68         struct TCP_Server_Info *server;
  69         int num_rqst = 0;
  70         int resp_buftype[3];
  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         int len;
  77
  78         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
  79         if (vars == NULL)
  80                 return -ENOMEM;
  81         rqst = &vars->rqst[0];
  82         rsp_iov = &vars->rsp_iov[0];
  83
  84         server = cifs_pick_channel(ses);
  85
  86         if (smb3_encryption_required(tcon))
  87                 flags |= CIFS_TRANSFORM_REQ;
  88
  89         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
  90
  91         /* We already have a handle so we can skip the open */
  92         if (cfile)
  93                 goto after_open;
  94
  95         /* Open */
  96         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
  97         if (!utf16_path) {
  98                 rc = -ENOMEM;
  99                 goto finished;
 100         }
 101
 102         vars->oparms.tcon = tcon;
 103         vars->oparms.desired_access = desired_access;
 104         vars->oparms.disposition = create_disposition;
 105         vars->oparms.create_options = cifs_create_options(cifs_sb, create_options);
 106         vars->oparms.fid = &fid;
 107         vars->oparms.reconnect = false;
 108         vars->oparms.mode = mode;
 109         vars->oparms.cifs_sb = cifs_sb;
 110
 111         rqst[num_rqst].rq_iov = &vars->open_iov[0];
 112         rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
 113         rc = SMB2_open_init(tcon, server,
 114                             &rqst[num_rqst], &oplock, &vars->oparms,
 115                             utf16_path);
 116         kfree(utf16_path);
 117         if (rc)
 118                 goto finished;
 119
 120         smb2_set_next_command(tcon, &rqst[num_rqst]);
 121  after_open:
 122         num_rqst++;
 123         rc = 0;
 124
 125         /* Operation */
 126         switch (command) {
 127         case SMB2_OP_QUERY_INFO:
 128                 rqst[num_rqst].rq_iov = &vars->qi_iov[0];
 129                 rqst[num_rqst].rq_nvec = 1;
 130
 131                 if (cfile)
 132                         rc = SMB2_query_info_init(tcon, server,
 133                                 &rqst[num_rqst],
 134                                 cfile->fid.persistent_fid,
 135                                 cfile->fid.volatile_fid,
 136                                 FILE_ALL_INFORMATION,
 137                                 SMB2_O_INFO_FILE, 0,
 138                                 sizeof(struct smb2_file_all_info) +
 139                                           PATH_MAX * 2, 0, NULL);
 140                 else {
 141                         rc = SMB2_query_info_init(tcon, server,
 142                                 &rqst[num_rqst],
 143                                 COMPOUND_FID,
 144                                 COMPOUND_FID,
 145                                 FILE_ALL_INFORMATION,
 146                                 SMB2_O_INFO_FILE, 0,
 147                                 sizeof(struct smb2_file_all_info) +
 148                                           PATH_MAX * 2, 0, NULL);
 149                         if (!rc) {
 150                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 151                                 smb2_set_related(&rqst[num_rqst]);
 152                         }
 153                 }
 154
 155                 if (rc)
 156                         goto finished;
 157                 num_rqst++;
 158                 trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
 159                                                      full_path);
 160                 break;
 161         case SMB2_OP_POSIX_QUERY_INFO:
 162                 rqst[num_rqst].rq_iov = &vars->qi_iov[0];
 163                 rqst[num_rqst].rq_nvec = 1;
 164
 165                 if (cfile)
 166                         rc = SMB2_query_info_init(tcon, server,
 167                                 &rqst[num_rqst],
 168                                 cfile->fid.persistent_fid,
 169                                 cfile->fid.volatile_fid,
 170                                 SMB_FIND_FILE_POSIX_INFO,
 171                                 SMB2_O_INFO_FILE, 0,
 172                                 /* TBD: fix following to allow for longer SIDs */
 173                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 174                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 175                 else {
 176                         rc = SMB2_query_info_init(tcon, server,
 177                                 &rqst[num_rqst],
 178                                 COMPOUND_FID,
 179                                 COMPOUND_FID,
 180                                 SMB_FIND_FILE_POSIX_INFO,
 181                                 SMB2_O_INFO_FILE, 0,
 182                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 183                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 184                         if (!rc) {
 185                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 186                                 smb2_set_related(&rqst[num_rqst]);
 187                         }
 188                 }
 189
 190                 if (rc)
 191                         goto finished;
 192                 num_rqst++;
 193                 trace_smb3_posix_query_info_compound_enter(xid, ses->Suid, tcon->tid, full_path);
 194                 break;
 195         case SMB2_OP_DELETE:
 196                 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
 197                 break;
 198         case SMB2_OP_MKDIR:
 199                 /*
 200                  * Directories are created through parameters in the
 201                  * SMB2_open() call.
 202                  */
 203                 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
 204                 break;
 205         case SMB2_OP_RMDIR:
 206                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 207                 rqst[num_rqst].rq_nvec = 1;
 208
 209                 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
 210                 data[0] = &delete_pending[0];
 211
 212                 rc = SMB2_set_info_init(tcon, server,
 213                                         &rqst[num_rqst], COMPOUND_FID,
 214                                         COMPOUND_FID, current->tgid,
 215                                         FILE_DISPOSITION_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_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
 222                 break;
 223         case SMB2_OP_SET_EOF:
 224                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 225                 rqst[num_rqst].rq_nvec = 1;
 226
 227                 size[0] = 8; /* sizeof __le64 */
 228                 data[0] = ptr;
 229
 230                 rc = SMB2_set_info_init(tcon, server,
 231                                         &rqst[num_rqst], COMPOUND_FID,
 232                                         COMPOUND_FID, current->tgid,
 233                                         FILE_END_OF_FILE_INFORMATION,
 234                                         SMB2_O_INFO_FILE, 0, data, size);
 235                 if (rc)
 236                         goto finished;
 237                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 238                 smb2_set_related(&rqst[num_rqst++]);
 239                 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
 240                 break;
 241         case SMB2_OP_SET_INFO:
 242                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 243                 rqst[num_rqst].rq_nvec = 1;
 244
 245
 246                 size[0] = sizeof(FILE_BASIC_INFO);
 247                 data[0] = ptr;
 248
 249                 if (cfile)
 250                         rc = SMB2_set_info_init(tcon, server,
 251                                 &rqst[num_rqst],
 252                                 cfile->fid.persistent_fid,
 253                                 cfile->fid.volatile_fid, current->tgid,
 254                                 FILE_BASIC_INFORMATION,
 255                                 SMB2_O_INFO_FILE, 0, data, size);
 256                 else {
 257                         rc = SMB2_set_info_init(tcon, server,
 258                                 &rqst[num_rqst],
 259                                 COMPOUND_FID,
 260                                 COMPOUND_FID, current->tgid,
 261                                 FILE_BASIC_INFORMATION,
 262                                 SMB2_O_INFO_FILE, 0, data, size);
 263                         if (!rc) {
 264                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 265                                 smb2_set_related(&rqst[num_rqst]);
 266                         }
 267                 }
 268
 269                 if (rc)
 270                         goto finished;
 271                 num_rqst++;
 272                 trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
 273                                                    full_path);
 274                 break;
 275         case SMB2_OP_RENAME:
 276                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 277                 rqst[num_rqst].rq_nvec = 2;
 278
 279                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 280
 281                 vars->rename_info.ReplaceIfExists = 1;
 282                 vars->rename_info.RootDirectory = 0;
 283                 vars->rename_info.FileNameLength = cpu_to_le32(len);
 284
 285                 size[0] = sizeof(struct smb2_file_rename_info);
 286                 data[0] = &vars->rename_info;
 287
 288                 size[1] = len + 2 /* null */;
 289                 data[1] = (__le16 *)ptr;
 290
 291                 if (cfile)
 292                         rc = SMB2_set_info_init(tcon, server,
 293                                                 &rqst[num_rqst],
 294                                                 cfile->fid.persistent_fid,
 295                                                 cfile->fid.volatile_fid,
 296                                         current->tgid, FILE_RENAME_INFORMATION,
 297                                         SMB2_O_INFO_FILE, 0, data, size);
 298                 else {
 299                         rc = SMB2_set_info_init(tcon, server,
 300                                         &rqst[num_rqst],
 301                                         COMPOUND_FID, COMPOUND_FID,
 302                                         current->tgid, FILE_RENAME_INFORMATION,
 303                                         SMB2_O_INFO_FILE, 0, data, size);
 304                         if (!rc) {
 305                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 306                                 smb2_set_related(&rqst[num_rqst]);
 307                         }
 308                 }
 309                 if (rc)
 310                         goto finished;
 311                 num_rqst++;
 312                 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
 313                 break;
 314         case SMB2_OP_HARDLINK:
 315                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 316                 rqst[num_rqst].rq_nvec = 2;
 317
 318                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 319
 320                 vars->link_info.ReplaceIfExists = 0;
 321                 vars->link_info.RootDirectory = 0;
 322                 vars->link_info.FileNameLength = cpu_to_le32(len);
 323
 324                 size[0] = sizeof(struct smb2_file_link_info);
 325                 data[0] = &vars->link_info;
 326
 327                 size[1] = len + 2 /* null */;
 328                 data[1] = (__le16 *)ptr;
 329
 330                 rc = SMB2_set_info_init(tcon, server,
 331                                         &rqst[num_rqst], COMPOUND_FID,
 332                                         COMPOUND_FID, current->tgid,
 333                                         FILE_LINK_INFORMATION,
 334                                         SMB2_O_INFO_FILE, 0, data, size);
 335                 if (rc)
 336                         goto finished;
 337                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 338                 smb2_set_related(&rqst[num_rqst++]);
 339                 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
 340                 break;
 341         default:
 342                 cifs_dbg(VFS, "Invalid command\n");
 343                 rc = -EINVAL;
 344         }
 345         if (rc)
 346                 goto finished;
 347
 348         /* We already have a handle so we can skip the close */
 349         if (cfile)
 350                 goto after_close;
 351         /* Close */
 352         flags |= CIFS_CP_CREATE_CLOSE_OP;
 353         rqst[num_rqst].rq_iov = &vars->close_iov[0];
 354         rqst[num_rqst].rq_nvec = 1;
 355         rc = SMB2_close_init(tcon, server,
 356                              &rqst[num_rqst], COMPOUND_FID,
 357                              COMPOUND_FID, false);
 358         smb2_set_related(&rqst[num_rqst]);
 359         if (rc)
 360                 goto finished;
 361  after_close:
 362         num_rqst++;
 363
 364         if (cfile) {
 365                 cifsFileInfo_put(cfile);
 366                 cfile = NULL;
 367                 rc = compound_send_recv(xid, ses, server,
 368                                         flags, num_rqst - 2,
 369                                         &rqst[1], &resp_buftype[1],
 370                                         &rsp_iov[1]);
 371         } else
 372                 rc = compound_send_recv(xid, ses, server,
 373                                         flags, num_rqst,
 374                                         rqst, resp_buftype,
 375                                         rsp_iov);
 376
 377  finished:
 378         if (cfile)
 379                 cifsFileInfo_put(cfile);
 380
 381         SMB2_open_free(&rqst[0]);
 382         if (rc == -EREMCHG) {
 383                 pr_warn_once("server share %s deleted\n", tcon->treeName);
 384                 tcon->need_reconnect = true;
 385         }
 386
 387         switch (command) {
 388         case SMB2_OP_QUERY_INFO:
 389                 if (rc == 0) {
 390                         qi_rsp = (struct smb2_query_info_rsp *)
 391                                 rsp_iov[1].iov_base;
 392                         rc = smb2_validate_and_copy_iov(
 393                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 394                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 395                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 396                                 ptr);
 397                 }
 398                 if (rqst[1].rq_iov)
 399                         SMB2_query_info_free(&rqst[1]);
 400                 if (rqst[2].rq_iov)
 401                         SMB2_close_free(&rqst[2]);
 402                 if (rc)
 403                         trace_smb3_query_info_compound_err(xid,  ses->Suid,
 404                                                 tcon->tid, rc);
 405                 else
 406                         trace_smb3_query_info_compound_done(xid, ses->Suid,
 407                                                 tcon->tid);
 408                 break;
 409         case SMB2_OP_POSIX_QUERY_INFO:
 410                 if (rc == 0) {
 411                         qi_rsp = (struct smb2_query_info_rsp *)
 412                                 rsp_iov[1].iov_base;
 413                         rc = smb2_validate_and_copy_iov(
 414                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 415                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 416                                 &rsp_iov[1], sizeof(struct smb311_posix_qinfo) /* add SIDs */, ptr);
 417                 }
 418                 if (rqst[1].rq_iov)
 419                         SMB2_query_info_free(&rqst[1]);
 420                 if (rqst[2].rq_iov)
 421                         SMB2_close_free(&rqst[2]);
 422                 if (rc)
 423                         trace_smb3_posix_query_info_compound_err(xid,  ses->Suid, tcon->tid, rc);
 424                 else
 425                         trace_smb3_posix_query_info_compound_done(xid, ses->Suid, tcon->tid);
 426                 break;
 427         case SMB2_OP_DELETE:
 428                 if (rc)
 429                         trace_smb3_delete_err(xid,  ses->Suid, tcon->tid, rc);
 430                 else
 431                         trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
 432                 if (rqst[1].rq_iov)
 433                         SMB2_close_free(&rqst[1]);
 434                 break;
 435         case SMB2_OP_MKDIR:
 436                 if (rc)
 437                         trace_smb3_mkdir_err(xid,  ses->Suid, tcon->tid, rc);
 438                 else
 439                         trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
 440                 if (rqst[1].rq_iov)
 441                         SMB2_close_free(&rqst[1]);
 442                 break;
 443         case SMB2_OP_HARDLINK:
 444                 if (rc)
 445                         trace_smb3_hardlink_err(xid,  ses->Suid, tcon->tid, rc);
 446                 else
 447                         trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
 448                 free_set_inf_compound(rqst);
 449                 break;
 450         case SMB2_OP_RENAME:
 451                 if (rc)
 452                         trace_smb3_rename_err(xid,  ses->Suid, tcon->tid, rc);
 453                 else
 454                         trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
 455                 free_set_inf_compound(rqst);
 456                 break;
 457         case SMB2_OP_RMDIR:
 458                 if (rc)
 459                         trace_smb3_rmdir_err(xid,  ses->Suid, tcon->tid, rc);
 460                 else
 461                         trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
 462                 free_set_inf_compound(rqst);
 463                 break;
 464         case SMB2_OP_SET_EOF:
 465                 if (rc)
 466                         trace_smb3_set_eof_err(xid,  ses->Suid, tcon->tid, rc);
 467                 else
 468                         trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
 469                 free_set_inf_compound(rqst);
 470                 break;
 471         case SMB2_OP_SET_INFO:
 472                 if (rc)
 473                         trace_smb3_set_info_compound_err(xid,  ses->Suid,
 474                                                 tcon->tid, rc);
 475                 else
 476                         trace_smb3_set_info_compound_done(xid, ses->Suid,
 477                                                 tcon->tid);
 478                 free_set_inf_compound(rqst);
 479                 break;
 480         }
 481         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 482         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 483         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
 484         kfree(vars);
 485         return rc;
 486 }
 487
 488 void
 489 move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
 490 {
 491         memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
 492         dst->CurrentByteOffset = src->CurrentByteOffset;
 493         dst->Mode = src->Mode;
 494         dst->AlignmentRequirement = src->AlignmentRequirement;
 495         dst->IndexNumber1 = 0; /* we don't use it */
 496 }
 497
 498 int
 499 smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 500                      struct cifs_sb_info *cifs_sb, const char *full_path,
 501                      FILE_ALL_INFO *data, bool *adjust_tz, bool *reparse)
 502 {
 503         int rc;
 504         struct smb2_file_all_info *smb2_data;
 505         __u32 create_options = 0;
 506         struct cifsFileInfo *cfile;
 507         struct cached_fid *cfid = NULL;
 508
 509         *adjust_tz = false;
 510         *reparse = false;
 511
 512         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 513                             GFP_KERNEL);
 514         if (smb2_data == NULL)
 515                 return -ENOMEM;
 516
 517         /* If it is a root and its handle is cached then use it */
 518         rc = open_cached_dir(xid, tcon, full_path, cifs_sb, &cfid);
 519         if (!rc) {
 520                 if (tcon->crfid.file_all_info_is_valid) {
 521                         move_smb2_info_to_cifs(data,
 522                                                &tcon->crfid.file_all_info);
 523                 } else {
 524                         rc = SMB2_query_info(xid, tcon,
 525                                              cfid->fid->persistent_fid,
 526                                              cfid->fid->volatile_fid, smb2_data);
 527                         if (!rc)
 528                                 move_smb2_info_to_cifs(data, smb2_data);
 529                 }
 530                 close_cached_dir(cfid);
 531                 goto out;
 532         }
 533
 534         cifs_get_readable_path(tcon, full_path, &cfile);
 535         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 536                               FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
 537                               ACL_NO_MODE, smb2_data, SMB2_OP_QUERY_INFO, cfile);
 538         if (rc == -EOPNOTSUPP) {
 539                 *reparse = true;
 540                 create_options |= OPEN_REPARSE_POINT;
 541
 542                 /* Failed on a symbolic link - query a reparse point info */
 543                 cifs_get_readable_path(tcon, full_path, &cfile);
 544                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 545                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 546                                       create_options, ACL_NO_MODE,
 547                                       smb2_data, SMB2_OP_QUERY_INFO, cfile);
 548         }
 549         if (rc)
 550                 goto out;
 551
 552         move_smb2_info_to_cifs(data, smb2_data);
 553 out:
 554         kfree(smb2_data);
 555         return rc;
 556 }
 557
 558
 559 int
 560 smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 561                      struct cifs_sb_info *cifs_sb, const char *full_path,
 562                      struct smb311_posix_qinfo *data, bool *adjust_tz, bool *reparse)
 563 {
 564         int rc;
 565         __u32 create_options = 0;
 566         struct cifsFileInfo *cfile;
 567         struct smb311_posix_qinfo *smb2_data;
 568
 569         *adjust_tz = false;
 570         *reparse = false;
 571
 572         /* BB TODO: Make struct larger when add support for parsing owner SIDs */
 573         smb2_data = kzalloc(sizeof(struct smb311_posix_qinfo),
 574                             GFP_KERNEL);
 575         if (smb2_data == NULL)
 576                 return -ENOMEM;
 577
 578         /*
 579          * BB TODO: Add support for using the cached root handle.
 580          * Create SMB2_query_posix_info worker function to do non-compounded query
 581          * when we already have an open file handle for this. For now this is fast enough
 582          * (always using the compounded version).
 583          */
 584
 585         cifs_get_readable_path(tcon, full_path, &cfile);
 586         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 587                               FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
 588                               ACL_NO_MODE, smb2_data, SMB2_OP_POSIX_QUERY_INFO, cfile);
 589         if (rc == -EOPNOTSUPP) {
 590                 /* BB TODO: When support for special files added to Samba re-verify this path */
 591                 *reparse = true;
 592                 create_options |= OPEN_REPARSE_POINT;
 593
 594                 /* Failed on a symbolic link - query a reparse point info */
 595                 cifs_get_readable_path(tcon, full_path, &cfile);
 596                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 597                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 598                                       create_options, ACL_NO_MODE,
 599                                       smb2_data, SMB2_OP_POSIX_QUERY_INFO, cfile);
 600         }
 601         if (rc)
 602                 goto out;
 603
 604          /* TODO: will need to allow for the 2 SIDs when add support for getting owner UID/GID */
 605         memcpy(data, smb2_data, sizeof(struct smb311_posix_qinfo));
 606
 607 out:
 608         kfree(smb2_data);
 609         return rc;
 610 }
 611
 612 int
 613 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
 614            struct cifs_tcon *tcon, const char *name,
 615            struct cifs_sb_info *cifs_sb)
 616 {
 617         return smb2_compound_op(xid, tcon, cifs_sb, name,
 618                                 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 619                                 CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR,
 620                                 NULL);
 621 }
 622
 623 void
 624 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 625                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 626                    const unsigned int xid)
 627 {
 628         FILE_BASIC_INFO data;
 629         struct cifsInodeInfo *cifs_i;
 630         struct cifsFileInfo *cfile;
 631         u32 dosattrs;
 632         int tmprc;
 633
 634         memset(&data, 0, sizeof(data));
 635         cifs_i = CIFS_I(inode);
 636         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 637         data.Attributes = cpu_to_le32(dosattrs);
 638         cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
 639         tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
 640                                  FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 641                                  CREATE_NOT_FILE, ACL_NO_MODE,
 642                                  &data, SMB2_OP_SET_INFO, cfile);
 643         if (tmprc == 0)
 644                 cifs_i->cifsAttrs = dosattrs;
 645 }
 646
 647 int
 648 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 649            struct cifs_sb_info *cifs_sb)
 650 {
 651         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 652                                 CREATE_NOT_FILE, ACL_NO_MODE,
 653                                 NULL, SMB2_OP_RMDIR, NULL);
 654 }
 655
 656 int
 657 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 658             struct cifs_sb_info *cifs_sb)
 659 {
 660         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 661                                 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
 662                                 ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL);
 663 }
 664
 665 static int
 666 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 667                    const char *from_name, const char *to_name,
 668                    struct cifs_sb_info *cifs_sb, __u32 access, int command,
 669                    struct cifsFileInfo *cfile)
 670 {
 671         __le16 *smb2_to_name = NULL;
 672         int rc;
 673
 674         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 675         if (smb2_to_name == NULL) {
 676                 rc = -ENOMEM;
 677                 goto smb2_rename_path;
 678         }
 679         rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
 680                               FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name,
 681                               command, cfile);
 682 smb2_rename_path:
 683         kfree(smb2_to_name);
 684         return rc;
 685 }
 686
 687 int
 688 smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
 689                  const char *from_name, const char *to_name,
 690                  struct cifs_sb_info *cifs_sb)
 691 {
 692         struct cifsFileInfo *cfile;
 693
 694         cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
 695
 696         return smb2_set_path_attr(xid, tcon, from_name, to_name,
 697                                   cifs_sb, DELETE, SMB2_OP_RENAME, cfile);
 698 }
 699
 700 int
 701 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
 702                      const char *from_name, const char *to_name,
 703                      struct cifs_sb_info *cifs_sb)
 704 {
 705         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 706                                   FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK,
 707                                   NULL);
 708 }
 709
 710 int
 711 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 712                    const char *full_path, __u64 size,
 713                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 714 {
 715         __le64 eof = cpu_to_le64(size);
 716         struct cifsFileInfo *cfile;
 717
 718         cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 719         return smb2_compound_op(xid, tcon, cifs_sb, full_path,
 720                                 FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE,
 721                                 &eof, SMB2_OP_SET_EOF, cfile);
 722 }
 723
 724 int
 725 smb2_set_file_info(struct inode *inode, const char *full_path,
 726                    FILE_BASIC_INFO *buf, const unsigned int xid)
 727 {
 728         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 729         struct tcon_link *tlink;
 730         struct cifs_tcon *tcon;
 731         struct cifsFileInfo *cfile;
 732         int rc;
 733
 734         if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
 735             (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
 736             (buf->Attributes == 0))
 737                 return 0; /* would be a no op, no sense sending this */
 738
 739         tlink = cifs_sb_tlink(cifs_sb);
 740         if (IS_ERR(tlink))
 741                 return PTR_ERR(tlink);
 742         tcon = tlink_tcon(tlink);
 743
 744         cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 745         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 746                               FILE_WRITE_ATTRIBUTES, FILE_OPEN,
 747                               0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, cfile);
 748         cifs_put_tlink(tlink);
 749         return rc;
 750 }