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 ([email protected]),
   7  *              Steve French ([email protected])
   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 #include "cached_dir.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 /*
  51  * note: If cfile is passed, the reference to it is dropped here.
  52  * So make sure that you do not reuse cfile after return from this func.
  53  */
  54 static int
  55 smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
  56                  struct cifs_sb_info *cifs_sb, const char *full_path,
  57                  __u32 desired_access, __u32 create_disposition,
  58                  __u32 create_options, umode_t mode, void *ptr, int command,
  59                  struct cifsFileInfo *cfile)
  60 {
  61         struct cop_vars *vars = NULL;
  62         struct kvec *rsp_iov;
  63         struct smb_rqst *rqst;
  64         int rc;
  65         __le16 *utf16_path = NULL;
  66         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
  67         struct cifs_fid fid;
  68         struct cifs_ses *ses = tcon->ses;
  69         struct TCP_Server_Info *server;
  70         int num_rqst = 0;
  71         int resp_buftype[3];
  72         struct smb2_query_info_rsp *qi_rsp = NULL;
  73         int flags = 0;
  74         __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
  75         unsigned int size[2];
  76         void *data[2];
  77         int len;
  78
  79         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
  80         if (vars == NULL)
  81                 return -ENOMEM;
  82         rqst = &vars->rqst[0];
  83         rsp_iov = &vars->rsp_iov[0];
  84
  85         server = cifs_pick_channel(ses);
  86
  87         if (smb3_encryption_required(tcon))
  88                 flags |= CIFS_TRANSFORM_REQ;
  89
  90         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
  91
  92         /* We already have a handle so we can skip the open */
  93         if (cfile)
  94                 goto after_open;
  95
  96         /* Open */
  97         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
  98         if (!utf16_path) {
  99                 rc = -ENOMEM;
 100                 goto finished;
 101         }
 102
 103         vars->oparms.tcon = tcon;
 104         vars->oparms.desired_access = desired_access;
 105         vars->oparms.disposition = create_disposition;
 106         vars->oparms.create_options = cifs_create_options(cifs_sb, create_options);
 107         vars->oparms.fid = &fid;
 108         vars->oparms.reconnect = false;
 109         vars->oparms.mode = mode;
 110         vars->oparms.cifs_sb = cifs_sb;
 111
 112         rqst[num_rqst].rq_iov = &vars->open_iov[0];
 113         rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
 114         rc = SMB2_open_init(tcon, server,
 115                             &rqst[num_rqst], &oplock, &vars->oparms,
 116                             utf16_path);
 117         kfree(utf16_path);
 118         if (rc)
 119                 goto finished;
 120
 121         smb2_set_next_command(tcon, &rqst[num_rqst]);
 122  after_open:
 123         num_rqst++;
 124         rc = 0;
 125
 126         /* Operation */
 127         switch (command) {
 128         case SMB2_OP_QUERY_INFO:
 129                 rqst[num_rqst].rq_iov = &vars->qi_iov[0];
 130                 rqst[num_rqst].rq_nvec = 1;
 131
 132                 if (cfile)
 133                         rc = SMB2_query_info_init(tcon, server,
 134                                 &rqst[num_rqst],
 135                                 cfile->fid.persistent_fid,
 136                                 cfile->fid.volatile_fid,
 137                                 FILE_ALL_INFORMATION,
 138                                 SMB2_O_INFO_FILE, 0,
 139                                 sizeof(struct smb2_file_all_info) +
 140                                           PATH_MAX * 2, 0, NULL);
 141                 else {
 142                         rc = SMB2_query_info_init(tcon, server,
 143                                 &rqst[num_rqst],
 144                                 COMPOUND_FID,
 145                                 COMPOUND_FID,
 146                                 FILE_ALL_INFORMATION,
 147                                 SMB2_O_INFO_FILE, 0,
 148                                 sizeof(struct smb2_file_all_info) +
 149                                           PATH_MAX * 2, 0, NULL);
 150                         if (!rc) {
 151                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 152                                 smb2_set_related(&rqst[num_rqst]);
 153                         }
 154                 }
 155
 156                 if (rc)
 157                         goto finished;
 158                 num_rqst++;
 159                 trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
 160                                                      full_path);
 161                 break;
 162         case SMB2_OP_POSIX_QUERY_INFO:
 163                 rqst[num_rqst].rq_iov = &vars->qi_iov[0];
 164                 rqst[num_rqst].rq_nvec = 1;
 165
 166                 if (cfile)
 167                         rc = SMB2_query_info_init(tcon, server,
 168                                 &rqst[num_rqst],
 169                                 cfile->fid.persistent_fid,
 170                                 cfile->fid.volatile_fid,
 171                                 SMB_FIND_FILE_POSIX_INFO,
 172                                 SMB2_O_INFO_FILE, 0,
 173                                 /* TBD: fix following to allow for longer SIDs */
 174                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 175                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 176                 else {
 177                         rc = SMB2_query_info_init(tcon, server,
 178                                 &rqst[num_rqst],
 179                                 COMPOUND_FID,
 180                                 COMPOUND_FID,
 181                                 SMB_FIND_FILE_POSIX_INFO,
 182                                 SMB2_O_INFO_FILE, 0,
 183                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 184                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 185                         if (!rc) {
 186                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 187                                 smb2_set_related(&rqst[num_rqst]);
 188                         }
 189                 }
 190
 191                 if (rc)
 192                         goto finished;
 193                 num_rqst++;
 194                 trace_smb3_posix_query_info_compound_enter(xid, ses->Suid, tcon->tid, full_path);
 195                 break;
 196         case SMB2_OP_DELETE:
 197                 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
 198                 break;
 199         case SMB2_OP_MKDIR:
 200                 /*
 201                  * Directories are created through parameters in the
 202                  * SMB2_open() call.
 203                  */
 204                 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
 205                 break;
 206         case SMB2_OP_RMDIR:
 207                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 208                 rqst[num_rqst].rq_nvec = 1;
 209
 210                 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
 211                 data[0] = &delete_pending[0];
 212
 213                 rc = SMB2_set_info_init(tcon, server,
 214                                         &rqst[num_rqst], COMPOUND_FID,
 215                                         COMPOUND_FID, current->tgid,
 216                                         FILE_DISPOSITION_INFORMATION,
 217                                         SMB2_O_INFO_FILE, 0, data, size);
 218                 if (rc)
 219                         goto finished;
 220                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 221                 smb2_set_related(&rqst[num_rqst++]);
 222                 trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
 223                 break;
 224         case SMB2_OP_SET_EOF:
 225                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 226                 rqst[num_rqst].rq_nvec = 1;
 227
 228                 size[0] = 8; /* sizeof __le64 */
 229                 data[0] = ptr;
 230
 231                 rc = SMB2_set_info_init(tcon, server,
 232                                         &rqst[num_rqst], COMPOUND_FID,
 233                                         COMPOUND_FID, current->tgid,
 234                                         FILE_END_OF_FILE_INFORMATION,
 235                                         SMB2_O_INFO_FILE, 0, data, size);
 236                 if (rc)
 237                         goto finished;
 238                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 239                 smb2_set_related(&rqst[num_rqst++]);
 240                 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
 241                 break;
 242         case SMB2_OP_SET_INFO:
 243                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 244                 rqst[num_rqst].rq_nvec = 1;
 245
 246
 247                 size[0] = sizeof(FILE_BASIC_INFO);
 248                 data[0] = ptr;
 249
 250                 if (cfile)
 251                         rc = SMB2_set_info_init(tcon, server,
 252                                 &rqst[num_rqst],
 253                                 cfile->fid.persistent_fid,
 254                                 cfile->fid.volatile_fid, current->tgid,
 255                                 FILE_BASIC_INFORMATION,
 256                                 SMB2_O_INFO_FILE, 0, data, size);
 257                 else {
 258                         rc = SMB2_set_info_init(tcon, server,
 259                                 &rqst[num_rqst],
 260                                 COMPOUND_FID,
 261                                 COMPOUND_FID, current->tgid,
 262                                 FILE_BASIC_INFORMATION,
 263                                 SMB2_O_INFO_FILE, 0, data, size);
 264                         if (!rc) {
 265                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 266                                 smb2_set_related(&rqst[num_rqst]);
 267                         }
 268                 }
 269
 270                 if (rc)
 271                         goto finished;
 272                 num_rqst++;
 273                 trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
 274                                                    full_path);
 275                 break;
 276         case SMB2_OP_RENAME:
 277                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 278                 rqst[num_rqst].rq_nvec = 2;
 279
 280                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 281
 282                 vars->rename_info.ReplaceIfExists = 1;
 283                 vars->rename_info.RootDirectory = 0;
 284                 vars->rename_info.FileNameLength = cpu_to_le32(len);
 285
 286                 size[0] = sizeof(struct smb2_file_rename_info);
 287                 data[0] = &vars->rename_info;
 288
 289                 size[1] = len + 2 /* null */;
 290                 data[1] = (__le16 *)ptr;
 291
 292                 if (cfile)
 293                         rc = SMB2_set_info_init(tcon, server,
 294                                                 &rqst[num_rqst],
 295                                                 cfile->fid.persistent_fid,
 296                                                 cfile->fid.volatile_fid,
 297                                         current->tgid, FILE_RENAME_INFORMATION,
 298                                         SMB2_O_INFO_FILE, 0, data, size);
 299                 else {
 300                         rc = SMB2_set_info_init(tcon, server,
 301                                         &rqst[num_rqst],
 302                                         COMPOUND_FID, COMPOUND_FID,
 303                                         current->tgid, FILE_RENAME_INFORMATION,
 304                                         SMB2_O_INFO_FILE, 0, data, size);
 305                         if (!rc) {
 306                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 307                                 smb2_set_related(&rqst[num_rqst]);
 308                         }
 309                 }
 310                 if (rc)
 311                         goto finished;
 312                 num_rqst++;
 313                 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
 314                 break;
 315         case SMB2_OP_HARDLINK:
 316                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 317                 rqst[num_rqst].rq_nvec = 2;
 318
 319                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 320
 321                 vars->link_info.ReplaceIfExists = 0;
 322                 vars->link_info.RootDirectory = 0;
 323                 vars->link_info.FileNameLength = cpu_to_le32(len);
 324
 325                 size[0] = sizeof(struct smb2_file_link_info);
 326                 data[0] = &vars->link_info;
 327
 328                 size[1] = len + 2 /* null */;
 329                 data[1] = (__le16 *)ptr;
 330
 331                 rc = SMB2_set_info_init(tcon, server,
 332                                         &rqst[num_rqst], COMPOUND_FID,
 333                                         COMPOUND_FID, current->tgid,
 334                                         FILE_LINK_INFORMATION,
 335                                         SMB2_O_INFO_FILE, 0, data, size);
 336                 if (rc)
 337                         goto finished;
 338                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 339                 smb2_set_related(&rqst[num_rqst++]);
 340                 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
 341                 break;
 342         default:
 343                 cifs_dbg(VFS, "Invalid command\n");
 344                 rc = -EINVAL;
 345         }
 346         if (rc)
 347                 goto finished;
 348
 349         /* We already have a handle so we can skip the close */
 350         if (cfile)
 351                 goto after_close;
 352         /* Close */
 353         flags |= CIFS_CP_CREATE_CLOSE_OP;
 354         rqst[num_rqst].rq_iov = &vars->close_iov[0];
 355         rqst[num_rqst].rq_nvec = 1;
 356         rc = SMB2_close_init(tcon, server,
 357                              &rqst[num_rqst], COMPOUND_FID,
 358                              COMPOUND_FID, false);
 359         smb2_set_related(&rqst[num_rqst]);
 360         if (rc)
 361                 goto finished;
 362  after_close:
 363         num_rqst++;
 364
 365         if (cfile) {
 366                 rc = compound_send_recv(xid, ses, server,
 367                                         flags, num_rqst - 2,
 368                                         &rqst[1], &resp_buftype[1],
 369                                         &rsp_iov[1]);
 370         } else
 371                 rc = compound_send_recv(xid, ses, server,
 372                                         flags, num_rqst,
 373                                         rqst, resp_buftype,
 374                                         rsp_iov);
 375
 376  finished:
 377         if (cfile)
 378                 cifsFileInfo_put(cfile);
 379
 380         SMB2_open_free(&rqst[0]);
 381         if (rc == -EREMCHG) {
 382                 pr_warn_once("server share %s deleted\n", tcon->treeName);
 383                 tcon->need_reconnect = true;
 384         }
 385
 386         switch (command) {
 387         case SMB2_OP_QUERY_INFO:
 388                 if (rc == 0) {
 389                         qi_rsp = (struct smb2_query_info_rsp *)
 390                                 rsp_iov[1].iov_base;
 391                         rc = smb2_validate_and_copy_iov(
 392                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 393                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 394                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 395                                 ptr);
 396                 }
 397                 if (rqst[1].rq_iov)
 398                         SMB2_query_info_free(&rqst[1]);
 399                 if (rqst[2].rq_iov)
 400                         SMB2_close_free(&rqst[2]);
 401                 if (rc)
 402                         trace_smb3_query_info_compound_err(xid,  ses->Suid,
 403                                                 tcon->tid, rc);
 404                 else
 405                         trace_smb3_query_info_compound_done(xid, ses->Suid,
 406                                                 tcon->tid);
 407                 break;
 408         case SMB2_OP_POSIX_QUERY_INFO:
 409                 if (rc == 0) {
 410                         qi_rsp = (struct smb2_query_info_rsp *)
 411                                 rsp_iov[1].iov_base;
 412                         rc = smb2_validate_and_copy_iov(
 413                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 414                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 415                                 &rsp_iov[1], sizeof(struct smb311_posix_qinfo) /* add SIDs */, ptr);
 416                 }
 417                 if (rqst[1].rq_iov)
 418                         SMB2_query_info_free(&rqst[1]);
 419                 if (rqst[2].rq_iov)
 420                         SMB2_close_free(&rqst[2]);
 421                 if (rc)
 422                         trace_smb3_posix_query_info_compound_err(xid,  ses->Suid, tcon->tid, rc);
 423                 else
 424                         trace_smb3_posix_query_info_compound_done(xid, ses->Suid, tcon->tid);
 425                 break;
 426         case SMB2_OP_DELETE:
 427                 if (rc)
 428                         trace_smb3_delete_err(xid,  ses->Suid, tcon->tid, rc);
 429                 else
 430                         trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
 431                 if (rqst[1].rq_iov)
 432                         SMB2_close_free(&rqst[1]);
 433                 break;
 434         case SMB2_OP_MKDIR:
 435                 if (rc)
 436                         trace_smb3_mkdir_err(xid,  ses->Suid, tcon->tid, rc);
 437                 else
 438                         trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
 439                 if (rqst[1].rq_iov)
 440                         SMB2_close_free(&rqst[1]);
 441                 break;
 442         case SMB2_OP_HARDLINK:
 443                 if (rc)
 444                         trace_smb3_hardlink_err(xid,  ses->Suid, tcon->tid, rc);
 445                 else
 446                         trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
 447                 free_set_inf_compound(rqst);
 448                 break;
 449         case SMB2_OP_RENAME:
 450                 if (rc)
 451                         trace_smb3_rename_err(xid,  ses->Suid, tcon->tid, rc);
 452                 else
 453                         trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
 454                 free_set_inf_compound(rqst);
 455                 break;
 456         case SMB2_OP_RMDIR:
 457                 if (rc)
 458                         trace_smb3_rmdir_err(xid,  ses->Suid, tcon->tid, rc);
 459                 else
 460                         trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
 461                 free_set_inf_compound(rqst);
 462                 break;
 463         case SMB2_OP_SET_EOF:
 464                 if (rc)
 465                         trace_smb3_set_eof_err(xid,  ses->Suid, tcon->tid, rc);
 466                 else
 467                         trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
 468                 free_set_inf_compound(rqst);
 469                 break;
 470         case SMB2_OP_SET_INFO:
 471                 if (rc)
 472                         trace_smb3_set_info_compound_err(xid,  ses->Suid,
 473                                                 tcon->tid, rc);
 474                 else
 475                         trace_smb3_set_info_compound_done(xid, ses->Suid,
 476                                                 tcon->tid);
 477                 free_set_inf_compound(rqst);
 478                 break;
 479         }
 480         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 481         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 482         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
 483         kfree(vars);
 484         return rc;
 485 }
 486
 487 void
 488 move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
 489 {
 490         memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
 491         dst->CurrentByteOffset = src->CurrentByteOffset;
 492         dst->Mode = src->Mode;
 493         dst->AlignmentRequirement = src->AlignmentRequirement;
 494         dst->IndexNumber1 = 0; /* we don't use it */
 495 }
 496
 497 int
 498 smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 499                      struct cifs_sb_info *cifs_sb, const char *full_path,
 500                      FILE_ALL_INFO *data, bool *adjust_tz, bool *reparse)
 501 {
 502         int rc;
 503         struct smb2_file_all_info *smb2_data;
 504         __u32 create_options = 0;
 505         struct cifsFileInfo *cfile;
 506         struct cached_fid *cfid = NULL;
 507
 508         *adjust_tz = false;
 509         *reparse = false;
 510
 511         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 512                             GFP_KERNEL);
 513         if (smb2_data == NULL)
 514                 return -ENOMEM;
 515
 516         if (strcmp(full_path, ""))
 517                 rc = -ENOENT;
 518         else
 519                 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, false, &cfid);
 520         /* If it is a root and its handle is cached then use it */
 521         if (!rc) {
 522                 if (cfid->file_all_info_is_valid) {
 523                         move_smb2_info_to_cifs(data,
 524                                                &cfid->file_all_info);
 525                 } else {
 526                         rc = SMB2_query_info(xid, tcon,
 527                                              cfid->fid.persistent_fid,
 528                                              cfid->fid.volatile_fid, smb2_data);
 529                         if (!rc)
 530                                 move_smb2_info_to_cifs(data, smb2_data);
 531                 }
 532                 close_cached_dir(cfid);
 533                 goto out;
 534         }
 535
 536         cifs_get_readable_path(tcon, full_path, &cfile);
 537         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 538                               FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
 539                               ACL_NO_MODE, smb2_data, SMB2_OP_QUERY_INFO, cfile);
 540         if (rc == -EOPNOTSUPP) {
 541                 *reparse = true;
 542                 create_options |= OPEN_REPARSE_POINT;
 543
 544                 /* Failed on a symbolic link - query a reparse point info */
 545                 cifs_get_readable_path(tcon, full_path, &cfile);
 546                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 547                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 548                                       create_options, ACL_NO_MODE,
 549                                       smb2_data, SMB2_OP_QUERY_INFO, cfile);
 550         }
 551         if (rc)
 552                 goto out;
 553
 554         move_smb2_info_to_cifs(data, smb2_data);
 555 out:
 556         kfree(smb2_data);
 557         return rc;
 558 }
 559
 560
 561 int
 562 smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 563                      struct cifs_sb_info *cifs_sb, const char *full_path,
 564                      struct smb311_posix_qinfo *data, bool *adjust_tz, bool *reparse)
 565 {
 566         int rc;
 567         __u32 create_options = 0;
 568         struct cifsFileInfo *cfile;
 569         struct smb311_posix_qinfo *smb2_data;
 570
 571         *adjust_tz = false;
 572         *reparse = false;
 573
 574         /* BB TODO: Make struct larger when add support for parsing owner SIDs */
 575         smb2_data = kzalloc(sizeof(struct smb311_posix_qinfo),
 576                             GFP_KERNEL);
 577         if (smb2_data == NULL)
 578                 return -ENOMEM;
 579
 580         /*
 581          * BB TODO: Add support for using the cached root handle.
 582          * Create SMB2_query_posix_info worker function to do non-compounded query
 583          * when we already have an open file handle for this. For now this is fast enough
 584          * (always using the compounded version).
 585          */
 586
 587         cifs_get_readable_path(tcon, full_path, &cfile);
 588         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 589                               FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
 590                               ACL_NO_MODE, smb2_data, SMB2_OP_POSIX_QUERY_INFO, cfile);
 591         if (rc == -EOPNOTSUPP) {
 592                 /* BB TODO: When support for special files added to Samba re-verify this path */
 593                 *reparse = true;
 594                 create_options |= OPEN_REPARSE_POINT;
 595
 596                 /* Failed on a symbolic link - query a reparse point info */
 597                 cifs_get_readable_path(tcon, full_path, &cfile);
 598                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 599                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 600                                       create_options, ACL_NO_MODE,
 601                                       smb2_data, SMB2_OP_POSIX_QUERY_INFO, cfile);
 602         }
 603         if (rc)
 604                 goto out;
 605
 606          /* TODO: will need to allow for the 2 SIDs when add support for getting owner UID/GID */
 607         memcpy(data, smb2_data, sizeof(struct smb311_posix_qinfo));
 608
 609 out:
 610         kfree(smb2_data);
 611         return rc;
 612 }
 613
 614 int
 615 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
 616            struct cifs_tcon *tcon, const char *name,
 617            struct cifs_sb_info *cifs_sb)
 618 {
 619         return smb2_compound_op(xid, tcon, cifs_sb, name,
 620                                 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 621                                 CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR,
 622                                 NULL);
 623 }
 624
 625 void
 626 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 627                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 628                    const unsigned int xid)
 629 {
 630         FILE_BASIC_INFO data;
 631         struct cifsInodeInfo *cifs_i;
 632         struct cifsFileInfo *cfile;
 633         u32 dosattrs;
 634         int tmprc;
 635
 636         memset(&data, 0, sizeof(data));
 637         cifs_i = CIFS_I(inode);
 638         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 639         data.Attributes = cpu_to_le32(dosattrs);
 640         cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
 641         tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
 642                                  FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 643                                  CREATE_NOT_FILE, ACL_NO_MODE,
 644                                  &data, SMB2_OP_SET_INFO, cfile);
 645         if (tmprc == 0)
 646                 cifs_i->cifsAttrs = dosattrs;
 647 }
 648
 649 int
 650 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 651            struct cifs_sb_info *cifs_sb)
 652 {
 653         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 654                                 CREATE_NOT_FILE, ACL_NO_MODE,
 655                                 NULL, SMB2_OP_RMDIR, NULL);
 656 }
 657
 658 int
 659 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 660             struct cifs_sb_info *cifs_sb)
 661 {
 662         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 663                                 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
 664                                 ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL);
 665 }
 666
 667 static int
 668 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 669                    const char *from_name, const char *to_name,
 670                    struct cifs_sb_info *cifs_sb, __u32 access, int command,
 671                    struct cifsFileInfo *cfile)
 672 {
 673         __le16 *smb2_to_name = NULL;
 674         int rc;
 675
 676         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 677         if (smb2_to_name == NULL) {
 678                 rc = -ENOMEM;
 679                 goto smb2_rename_path;
 680         }
 681         rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
 682                               FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name,
 683                               command, cfile);
 684 smb2_rename_path:
 685         kfree(smb2_to_name);
 686         return rc;
 687 }
 688
 689 int
 690 smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
 691                  const char *from_name, const char *to_name,
 692                  struct cifs_sb_info *cifs_sb)
 693 {
 694         struct cifsFileInfo *cfile;
 695
 696         cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
 697
 698         return smb2_set_path_attr(xid, tcon, from_name, to_name,
 699                                   cifs_sb, DELETE, SMB2_OP_RENAME, cfile);
 700 }
 701
 702 int
 703 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
 704                      const char *from_name, const char *to_name,
 705                      struct cifs_sb_info *cifs_sb)
 706 {
 707         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 708                                   FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK,
 709                                   NULL);
 710 }
 711
 712 int
 713 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 714                    const char *full_path, __u64 size,
 715                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 716 {
 717         __le64 eof = cpu_to_le64(size);
 718         struct cifsFileInfo *cfile;
 719
 720         cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 721         return smb2_compound_op(xid, tcon, cifs_sb, full_path,
 722                                 FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE,
 723                                 &eof, SMB2_OP_SET_EOF, cfile);
 724 }
 725
 726 int
 727 smb2_set_file_info(struct inode *inode, const char *full_path,
 728                    FILE_BASIC_INFO *buf, const unsigned int xid)
 729 {
 730         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 731         struct tcon_link *tlink;
 732         struct cifs_tcon *tcon;
 733         struct cifsFileInfo *cfile;
 734         int rc;
 735
 736         if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
 737             (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
 738             (buf->Attributes == 0))
 739                 return 0; /* would be a no op, no sense sending this */
 740
 741         tlink = cifs_sb_tlink(cifs_sb);
 742         if (IS_ERR(tlink))
 743                 return PTR_ERR(tlink);
 744         tcon = tlink_tcon(tlink);
 745
 746         cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 747         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 748                               FILE_WRITE_ATTRIBUTES, FILE_OPEN,
 749                               0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, cfile);
 750         cifs_put_tlink(tlink);
 751         return rc;
 752 }