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