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 #include "cached_dir.h"
  27 #include "smb2status.h"
  28
  29 static void
  30 free_set_inf_compound(struct smb_rqst *rqst)
  31 {
  32         if (rqst[1].rq_iov)
  33                 SMB2_set_info_free(&rqst[1]);
  34         if (rqst[2].rq_iov)
  35                 SMB2_close_free(&rqst[2]);
  36 }
  37
  38
  39 struct cop_vars {
  40         struct cifs_open_parms oparms;
  41         struct kvec rsp_iov[3];
  42         struct smb_rqst rqst[3];
  43         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
  44         struct kvec qi_iov[1];
  45         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
  46         struct kvec close_iov[1];
  47         struct smb2_file_rename_info rename_info;
  48         struct smb2_file_link_info link_info;
  49 };
  50
  51 /*
  52  * note: If cfile is passed, the reference to it is dropped here.
  53  * So make sure that you do not reuse cfile after return from this func.
  54  *
  55  * If passing @err_iov and @err_buftype, ensure to make them both large enough (>= 3) to hold all
  56  * error responses.  Caller is also responsible for freeing them up.
  57  */
  58 static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
  59                             struct cifs_sb_info *cifs_sb, const char *full_path,
  60                             __u32 desired_access, __u32 create_disposition, __u32 create_options,
  61                             umode_t mode, void *ptr, int command, struct cifsFileInfo *cfile,
  62                             struct kvec *err_iov, int *err_buftype)
  63 {
  64         struct cop_vars *vars = NULL;
  65         struct kvec *rsp_iov;
  66         struct smb_rqst *rqst;
  67         int rc;
  68         __le16 *utf16_path = NULL;
  69         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
  70         struct cifs_fid fid;
  71         struct cifs_ses *ses = tcon->ses;
  72         struct TCP_Server_Info *server;
  73         int num_rqst = 0;
  74         int resp_buftype[3];
  75         struct smb2_query_info_rsp *qi_rsp = NULL;
  76         struct cifs_open_info_data *idata;
  77         int flags = 0;
  78         __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
  79         unsigned int size[2];
  80         void *data[2];
  81         int len;
  82
  83         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
  84         if (vars == NULL)
  85                 return -ENOMEM;
  86         rqst = &vars->rqst[0];
  87         rsp_iov = &vars->rsp_iov[0];
  88
  89         server = cifs_pick_channel(ses);
  90
  91         if (smb3_encryption_required(tcon))
  92                 flags |= CIFS_TRANSFORM_REQ;
  93
  94         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
  95
  96         /* We already have a handle so we can skip the open */
  97         if (cfile)
  98                 goto after_open;
  99
 100         /* Open */
 101         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 102         if (!utf16_path) {
 103                 rc = -ENOMEM;
 104                 goto finished;
 105         }
 106
 107         vars->oparms.tcon = tcon;
 108         vars->oparms.desired_access = desired_access;
 109         vars->oparms.disposition = create_disposition;
 110         vars->oparms.create_options = cifs_create_options(cifs_sb, create_options);
 111         vars->oparms.fid = &fid;
 112         vars->oparms.reconnect = false;
 113         vars->oparms.mode = mode;
 114         vars->oparms.cifs_sb = cifs_sb;
 115
 116         rqst[num_rqst].rq_iov = &vars->open_iov[0];
 117         rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
 118         rc = SMB2_open_init(tcon, server,
 119                             &rqst[num_rqst], &oplock, &vars->oparms,
 120                             utf16_path);
 121         kfree(utf16_path);
 122         if (rc)
 123                 goto finished;
 124
 125         smb2_set_next_command(tcon, &rqst[num_rqst]);
 126  after_open:
 127         num_rqst++;
 128         rc = 0;
 129
 130         /* Operation */
 131         switch (command) {
 132         case SMB2_OP_QUERY_INFO:
 133                 rqst[num_rqst].rq_iov = &vars->qi_iov[0];
 134                 rqst[num_rqst].rq_nvec = 1;
 135
 136                 if (cfile)
 137                         rc = SMB2_query_info_init(tcon, server,
 138                                 &rqst[num_rqst],
 139                                 cfile->fid.persistent_fid,
 140                                 cfile->fid.volatile_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                 else {
 146                         rc = SMB2_query_info_init(tcon, server,
 147                                 &rqst[num_rqst],
 148                                 COMPOUND_FID,
 149                                 COMPOUND_FID,
 150                                 FILE_ALL_INFORMATION,
 151                                 SMB2_O_INFO_FILE, 0,
 152                                 sizeof(struct smb2_file_all_info) +
 153                                           PATH_MAX * 2, 0, NULL);
 154                         if (!rc) {
 155                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 156                                 smb2_set_related(&rqst[num_rqst]);
 157                         }
 158                 }
 159
 160                 if (rc)
 161                         goto finished;
 162                 num_rqst++;
 163                 trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
 164                                                      full_path);
 165                 break;
 166         case SMB2_OP_POSIX_QUERY_INFO:
 167                 rqst[num_rqst].rq_iov = &vars->qi_iov[0];
 168                 rqst[num_rqst].rq_nvec = 1;
 169
 170                 if (cfile)
 171                         rc = SMB2_query_info_init(tcon, server,
 172                                 &rqst[num_rqst],
 173                                 cfile->fid.persistent_fid,
 174                                 cfile->fid.volatile_fid,
 175                                 SMB_FIND_FILE_POSIX_INFO,
 176                                 SMB2_O_INFO_FILE, 0,
 177                                 /* TBD: fix following to allow for longer SIDs */
 178                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 179                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 180                 else {
 181                         rc = SMB2_query_info_init(tcon, server,
 182                                 &rqst[num_rqst],
 183                                 COMPOUND_FID,
 184                                 COMPOUND_FID,
 185                                 SMB_FIND_FILE_POSIX_INFO,
 186                                 SMB2_O_INFO_FILE, 0,
 187                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 188                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 189                         if (!rc) {
 190                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 191                                 smb2_set_related(&rqst[num_rqst]);
 192                         }
 193                 }
 194
 195                 if (rc)
 196                         goto finished;
 197                 num_rqst++;
 198                 trace_smb3_posix_query_info_compound_enter(xid, ses->Suid, tcon->tid, full_path);
 199                 break;
 200         case SMB2_OP_DELETE:
 201                 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
 202                 break;
 203         case SMB2_OP_MKDIR:
 204                 /*
 205                  * Directories are created through parameters in the
 206                  * SMB2_open() call.
 207                  */
 208                 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
 209                 break;
 210         case SMB2_OP_RMDIR:
 211                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 212                 rqst[num_rqst].rq_nvec = 1;
 213
 214                 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
 215                 data[0] = &delete_pending[0];
 216
 217                 rc = SMB2_set_info_init(tcon, server,
 218                                         &rqst[num_rqst], COMPOUND_FID,
 219                                         COMPOUND_FID, current->tgid,
 220                                         FILE_DISPOSITION_INFORMATION,
 221                                         SMB2_O_INFO_FILE, 0, data, size);
 222                 if (rc)
 223                         goto finished;
 224                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 225                 smb2_set_related(&rqst[num_rqst++]);
 226                 trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
 227                 break;
 228         case SMB2_OP_SET_EOF:
 229                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 230                 rqst[num_rqst].rq_nvec = 1;
 231
 232                 size[0] = 8; /* sizeof __le64 */
 233                 data[0] = ptr;
 234
 235                 rc = SMB2_set_info_init(tcon, server,
 236                                         &rqst[num_rqst], COMPOUND_FID,
 237                                         COMPOUND_FID, current->tgid,
 238                                         FILE_END_OF_FILE_INFORMATION,
 239                                         SMB2_O_INFO_FILE, 0, data, size);
 240                 if (rc)
 241                         goto finished;
 242                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 243                 smb2_set_related(&rqst[num_rqst++]);
 244                 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
 245                 break;
 246         case SMB2_OP_SET_INFO:
 247                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 248                 rqst[num_rqst].rq_nvec = 1;
 249
 250
 251                 size[0] = sizeof(FILE_BASIC_INFO);
 252                 data[0] = ptr;
 253
 254                 if (cfile)
 255                         rc = SMB2_set_info_init(tcon, server,
 256                                 &rqst[num_rqst],
 257                                 cfile->fid.persistent_fid,
 258                                 cfile->fid.volatile_fid, current->tgid,
 259                                 FILE_BASIC_INFORMATION,
 260                                 SMB2_O_INFO_FILE, 0, data, size);
 261                 else {
 262                         rc = SMB2_set_info_init(tcon, server,
 263                                 &rqst[num_rqst],
 264                                 COMPOUND_FID,
 265                                 COMPOUND_FID, current->tgid,
 266                                 FILE_BASIC_INFORMATION,
 267                                 SMB2_O_INFO_FILE, 0, data, size);
 268                         if (!rc) {
 269                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 270                                 smb2_set_related(&rqst[num_rqst]);
 271                         }
 272                 }
 273
 274                 if (rc)
 275                         goto finished;
 276                 num_rqst++;
 277                 trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
 278                                                    full_path);
 279                 break;
 280         case SMB2_OP_RENAME:
 281                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 282                 rqst[num_rqst].rq_nvec = 2;
 283
 284                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 285
 286                 vars->rename_info.ReplaceIfExists = 1;
 287                 vars->rename_info.RootDirectory = 0;
 288                 vars->rename_info.FileNameLength = cpu_to_le32(len);
 289
 290                 size[0] = sizeof(struct smb2_file_rename_info);
 291                 data[0] = &vars->rename_info;
 292
 293                 size[1] = len + 2 /* null */;
 294                 data[1] = (__le16 *)ptr;
 295
 296                 if (cfile)
 297                         rc = SMB2_set_info_init(tcon, server,
 298                                                 &rqst[num_rqst],
 299                                                 cfile->fid.persistent_fid,
 300                                                 cfile->fid.volatile_fid,
 301                                         current->tgid, FILE_RENAME_INFORMATION,
 302                                         SMB2_O_INFO_FILE, 0, data, size);
 303                 else {
 304                         rc = SMB2_set_info_init(tcon, server,
 305                                         &rqst[num_rqst],
 306                                         COMPOUND_FID, COMPOUND_FID,
 307                                         current->tgid, FILE_RENAME_INFORMATION,
 308                                         SMB2_O_INFO_FILE, 0, data, size);
 309                         if (!rc) {
 310                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 311                                 smb2_set_related(&rqst[num_rqst]);
 312                         }
 313                 }
 314                 if (rc)
 315                         goto finished;
 316                 num_rqst++;
 317                 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
 318                 break;
 319         case SMB2_OP_HARDLINK:
 320                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 321                 rqst[num_rqst].rq_nvec = 2;
 322
 323                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 324
 325                 vars->link_info.ReplaceIfExists = 0;
 326                 vars->link_info.RootDirectory = 0;
 327                 vars->link_info.FileNameLength = cpu_to_le32(len);
 328
 329                 size[0] = sizeof(struct smb2_file_link_info);
 330                 data[0] = &vars->link_info;
 331
 332                 size[1] = len + 2 /* null */;
 333                 data[1] = (__le16 *)ptr;
 334
 335                 rc = SMB2_set_info_init(tcon, server,
 336                                         &rqst[num_rqst], COMPOUND_FID,
 337                                         COMPOUND_FID, current->tgid,
 338                                         FILE_LINK_INFORMATION,
 339                                         SMB2_O_INFO_FILE, 0, data, size);
 340                 if (rc)
 341                         goto finished;
 342                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 343                 smb2_set_related(&rqst[num_rqst++]);
 344                 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
 345                 break;
 346         default:
 347                 cifs_dbg(VFS, "Invalid command\n");
 348                 rc = -EINVAL;
 349         }
 350         if (rc)
 351                 goto finished;
 352
 353         /* We already have a handle so we can skip the close */
 354         if (cfile)
 355                 goto after_close;
 356         /* Close */
 357         flags |= CIFS_CP_CREATE_CLOSE_OP;
 358         rqst[num_rqst].rq_iov = &vars->close_iov[0];
 359         rqst[num_rqst].rq_nvec = 1;
 360         rc = SMB2_close_init(tcon, server,
 361                              &rqst[num_rqst], COMPOUND_FID,
 362                              COMPOUND_FID, false);
 363         smb2_set_related(&rqst[num_rqst]);
 364         if (rc)
 365                 goto finished;
 366  after_close:
 367         num_rqst++;
 368
 369         if (cfile) {
 370                 rc = compound_send_recv(xid, ses, server,
 371                                         flags, num_rqst - 2,
 372                                         &rqst[1], &resp_buftype[1],
 373                                         &rsp_iov[1]);
 374         } else
 375                 rc = compound_send_recv(xid, ses, server,
 376                                         flags, num_rqst,
 377                                         rqst, resp_buftype,
 378                                         rsp_iov);
 379
 380  finished:
 381         if (cfile)
 382                 cifsFileInfo_put(cfile);
 383
 384         SMB2_open_free(&rqst[0]);
 385         if (rc == -EREMCHG) {
 386                 pr_warn_once("server share %s deleted\n", tcon->tree_name);
 387                 tcon->need_reconnect = true;
 388         }
 389
 390         switch (command) {
 391         case SMB2_OP_QUERY_INFO:
 392                 idata = ptr;
 393                 if (rc == 0 && cfile && cfile->symlink_target) {
 394                         idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 395                         if (!idata->symlink_target)
 396                                 rc = -ENOMEM;
 397                 }
 398                 if (rc == 0) {
 399                         qi_rsp = (struct smb2_query_info_rsp *)
 400                                 rsp_iov[1].iov_base;
 401                         rc = smb2_validate_and_copy_iov(
 402                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 403                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 404                                 &rsp_iov[1], sizeof(idata->fi), (char *)&idata->fi);
 405                 }
 406                 if (rqst[1].rq_iov)
 407                         SMB2_query_info_free(&rqst[1]);
 408                 if (rqst[2].rq_iov)
 409                         SMB2_close_free(&rqst[2]);
 410                 if (rc)
 411                         trace_smb3_query_info_compound_err(xid,  ses->Suid,
 412                                                 tcon->tid, rc);
 413                 else
 414                         trace_smb3_query_info_compound_done(xid, ses->Suid,
 415                                                 tcon->tid);
 416                 break;
 417         case SMB2_OP_POSIX_QUERY_INFO:
 418                 idata = ptr;
 419                 if (rc == 0 && cfile && cfile->symlink_target) {
 420                         idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 421                         if (!idata->symlink_target)
 422                                 rc = -ENOMEM;
 423                 }
 424                 if (rc == 0) {
 425                         qi_rsp = (struct smb2_query_info_rsp *)
 426                                 rsp_iov[1].iov_base;
 427                         rc = smb2_validate_and_copy_iov(
 428                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 429                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 430                                 &rsp_iov[1], sizeof(idata->posix_fi) /* add SIDs */,
 431                                 (char *)&idata->posix_fi);
 432                 }
 433                 if (rqst[1].rq_iov)
 434                         SMB2_query_info_free(&rqst[1]);
 435                 if (rqst[2].rq_iov)
 436                         SMB2_close_free(&rqst[2]);
 437                 if (rc)
 438                         trace_smb3_posix_query_info_compound_err(xid,  ses->Suid, tcon->tid, rc);
 439                 else
 440                         trace_smb3_posix_query_info_compound_done(xid, ses->Suid, tcon->tid);
 441                 break;
 442         case SMB2_OP_DELETE:
 443                 if (rc)
 444                         trace_smb3_delete_err(xid,  ses->Suid, tcon->tid, rc);
 445                 else
 446                         trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
 447                 if (rqst[1].rq_iov)
 448                         SMB2_close_free(&rqst[1]);
 449                 break;
 450         case SMB2_OP_MKDIR:
 451                 if (rc)
 452                         trace_smb3_mkdir_err(xid,  ses->Suid, tcon->tid, rc);
 453                 else
 454                         trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
 455                 if (rqst[1].rq_iov)
 456                         SMB2_close_free(&rqst[1]);
 457                 break;
 458         case SMB2_OP_HARDLINK:
 459                 if (rc)
 460                         trace_smb3_hardlink_err(xid,  ses->Suid, tcon->tid, rc);
 461                 else
 462                         trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
 463                 free_set_inf_compound(rqst);
 464                 break;
 465         case SMB2_OP_RENAME:
 466                 if (rc)
 467                         trace_smb3_rename_err(xid,  ses->Suid, tcon->tid, rc);
 468                 else
 469                         trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
 470                 free_set_inf_compound(rqst);
 471                 break;
 472         case SMB2_OP_RMDIR:
 473                 if (rc)
 474                         trace_smb3_rmdir_err(xid,  ses->Suid, tcon->tid, rc);
 475                 else
 476                         trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
 477                 free_set_inf_compound(rqst);
 478                 break;
 479         case SMB2_OP_SET_EOF:
 480                 if (rc)
 481                         trace_smb3_set_eof_err(xid,  ses->Suid, tcon->tid, rc);
 482                 else
 483                         trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
 484                 free_set_inf_compound(rqst);
 485                 break;
 486         case SMB2_OP_SET_INFO:
 487                 if (rc)
 488                         trace_smb3_set_info_compound_err(xid,  ses->Suid,
 489                                                 tcon->tid, rc);
 490                 else
 491                         trace_smb3_set_info_compound_done(xid, ses->Suid,
 492                                                 tcon->tid);
 493                 free_set_inf_compound(rqst);
 494                 break;
 495         }
 496
 497         if (rc && err_iov && err_buftype) {
 498                 memcpy(err_iov, rsp_iov, 3 * sizeof(*err_iov));
 499                 memcpy(err_buftype, resp_buftype, 3 * sizeof(*err_buftype));
 500         } else {
 501                 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 502                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 503                 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
 504         }
 505         kfree(vars);
 506         return rc;
 507 }
 508
 509 int smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 510                          struct cifs_sb_info *cifs_sb, const char *full_path,
 511                          struct cifs_open_info_data *data, bool *adjust_tz, bool *reparse)
 512 {
 513         int rc;
 514         __u32 create_options = 0;
 515         struct cifsFileInfo *cfile;
 516         struct cached_fid *cfid = NULL;
 517         struct kvec err_iov[3] = {};
 518         int err_buftype[3] = {};
 519
 520         *adjust_tz = false;
 521         *reparse = false;
 522
 523         if (strcmp(full_path, ""))
 524                 rc = -ENOENT;
 525         else
 526                 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, false, &cfid);
 527         /* If it is a root and its handle is cached then use it */
 528         if (!rc) {
 529                 if (cfid->file_all_info_is_valid) {
 530                         memcpy(&data->fi, &cfid->file_all_info, sizeof(data->fi));
 531                 } else {
 532                         rc = SMB2_query_info(xid, tcon, cfid->fid.persistent_fid,
 533                                              cfid->fid.volatile_fid, &data->fi);
 534                 }
 535                 close_cached_dir(cfid);
 536                 return rc;
 537         }
 538
 539         cifs_get_readable_path(tcon, full_path, &cfile);
 540         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN,
 541                               create_options, ACL_NO_MODE, data, SMB2_OP_QUERY_INFO, cfile,
 542                               err_iov, err_buftype);
 543         if (rc == -EOPNOTSUPP) {
 544                 if (err_iov[0].iov_base && err_buftype[0] != CIFS_NO_BUFFER &&
 545                     ((struct smb2_hdr *)err_iov[0].iov_base)->Command == SMB2_CREATE &&
 546                     ((struct smb2_hdr *)err_iov[0].iov_base)->Status == STATUS_STOPPED_ON_SYMLINK) {
 547                         rc = smb2_parse_symlink_response(cifs_sb, err_iov, &data->symlink_target);
 548                         if (rc)
 549                                 goto out;
 550                 }
 551                 *reparse = true;
 552                 create_options |= OPEN_REPARSE_POINT;
 553
 554                 /* Failed on a symbolic link - query a reparse point info */
 555                 cifs_get_readable_path(tcon, full_path, &cfile);
 556                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES,
 557                                       FILE_OPEN, create_options, ACL_NO_MODE, data,
 558                                       SMB2_OP_QUERY_INFO, cfile, NULL, NULL);
 559         }
 560
 561 out:
 562         free_rsp_buf(err_buftype[0], err_iov[0].iov_base);
 563         free_rsp_buf(err_buftype[1], err_iov[1].iov_base);
 564         free_rsp_buf(err_buftype[2], err_iov[2].iov_base);
 565         return rc;
 566 }
 567
 568
 569 int smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 570                                  struct cifs_sb_info *cifs_sb, const char *full_path,
 571                                  struct cifs_open_info_data *data, bool *adjust_tz, bool *reparse)
 572 {
 573         int rc;
 574         __u32 create_options = 0;
 575         struct cifsFileInfo *cfile;
 576         struct kvec err_iov[3] = {};
 577         int err_buftype[3] = {};
 578
 579         *adjust_tz = false;
 580         *reparse = false;
 581
 582         /*
 583          * BB TODO: Add support for using the cached root handle.
 584          * Create SMB2_query_posix_info worker function to do non-compounded query
 585          * when we already have an open file handle for this. For now this is fast enough
 586          * (always using the compounded version).
 587          */
 588
 589         cifs_get_readable_path(tcon, full_path, &cfile);
 590         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN,
 591                               create_options, ACL_NO_MODE, data, SMB2_OP_POSIX_QUERY_INFO, cfile,
 592                               err_iov, err_buftype);
 593         if (rc == -EOPNOTSUPP) {
 594                 /* BB TODO: When support for special files added to Samba re-verify this path */
 595                 if (err_iov[0].iov_base && err_buftype[0] != CIFS_NO_BUFFER &&
 596                     ((struct smb2_hdr *)err_iov[0].iov_base)->Command == SMB2_CREATE &&
 597                     ((struct smb2_hdr *)err_iov[0].iov_base)->Status == STATUS_STOPPED_ON_SYMLINK) {
 598                         rc = smb2_parse_symlink_response(cifs_sb, err_iov, &data->symlink_target);
 599                         if (rc)
 600                                 goto out;
 601                 }
 602                 *reparse = true;
 603                 create_options |= OPEN_REPARSE_POINT;
 604
 605                 /* Failed on a symbolic link - query a reparse point info */
 606                 cifs_get_readable_path(tcon, full_path, &cfile);
 607                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES,
 608                                       FILE_OPEN, create_options, ACL_NO_MODE, data,
 609                                       SMB2_OP_POSIX_QUERY_INFO, cfile, NULL, NULL);
 610         }
 611
 612 out:
 613         free_rsp_buf(err_buftype[0], err_iov[0].iov_base);
 614         free_rsp_buf(err_buftype[1], err_iov[1].iov_base);
 615         free_rsp_buf(err_buftype[2], err_iov[2].iov_base);
 616         return rc;
 617 }
 618
 619 int
 620 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
 621            struct cifs_tcon *tcon, const char *name,
 622            struct cifs_sb_info *cifs_sb)
 623 {
 624         return smb2_compound_op(xid, tcon, cifs_sb, name,
 625                                 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 626                                 CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR,
 627                                 NULL, NULL, NULL);
 628 }
 629
 630 void
 631 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 632                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 633                    const unsigned int xid)
 634 {
 635         FILE_BASIC_INFO data;
 636         struct cifsInodeInfo *cifs_i;
 637         struct cifsFileInfo *cfile;
 638         u32 dosattrs;
 639         int tmprc;
 640
 641         memset(&data, 0, sizeof(data));
 642         cifs_i = CIFS_I(inode);
 643         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 644         data.Attributes = cpu_to_le32(dosattrs);
 645         cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
 646         tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
 647                                  FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 648                                  CREATE_NOT_FILE, ACL_NO_MODE,
 649                                  &data, SMB2_OP_SET_INFO, cfile, NULL, NULL);
 650         if (tmprc == 0)
 651                 cifs_i->cifsAttrs = dosattrs;
 652 }
 653
 654 int
 655 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 656            struct cifs_sb_info *cifs_sb)
 657 {
 658         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 659                                 CREATE_NOT_FILE, ACL_NO_MODE,
 660                                 NULL, SMB2_OP_RMDIR, NULL, NULL, NULL);
 661 }
 662
 663 int
 664 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 665             struct cifs_sb_info *cifs_sb)
 666 {
 667         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 668                                 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
 669                                 ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL, NULL, NULL);
 670 }
 671
 672 static int
 673 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 674                    const char *from_name, const char *to_name,
 675                    struct cifs_sb_info *cifs_sb, __u32 access, int command,
 676                    struct cifsFileInfo *cfile)
 677 {
 678         __le16 *smb2_to_name = NULL;
 679         int rc;
 680
 681         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 682         if (smb2_to_name == NULL) {
 683                 rc = -ENOMEM;
 684                 goto smb2_rename_path;
 685         }
 686         rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
 687                               FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name,
 688                               command, cfile, NULL, NULL);
 689 smb2_rename_path:
 690         kfree(smb2_to_name);
 691         return rc;
 692 }
 693
 694 int
 695 smb2_rename_path(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         struct cifsFileInfo *cfile;
 700
 701         cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
 702
 703         return smb2_set_path_attr(xid, tcon, from_name, to_name,
 704                                   cifs_sb, DELETE, SMB2_OP_RENAME, cfile);
 705 }
 706
 707 int
 708 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
 709                      const char *from_name, const char *to_name,
 710                      struct cifs_sb_info *cifs_sb)
 711 {
 712         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 713                                   FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK,
 714                                   NULL);
 715 }
 716
 717 int
 718 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 719                    const char *full_path, __u64 size,
 720                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 721 {
 722         __le64 eof = cpu_to_le64(size);
 723         struct cifsFileInfo *cfile;
 724
 725         cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 726         return smb2_compound_op(xid, tcon, cifs_sb, full_path,
 727                                 FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE,
 728                                 &eof, SMB2_OP_SET_EOF, cfile, NULL, NULL);
 729 }
 730
 731 int
 732 smb2_set_file_info(struct inode *inode, const char *full_path,
 733                    FILE_BASIC_INFO *buf, const unsigned int xid)
 734 {
 735         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 736         struct tcon_link *tlink;
 737         struct cifs_tcon *tcon;
 738         struct cifsFileInfo *cfile;
 739         int rc;
 740
 741         if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
 742             (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
 743             (buf->Attributes == 0))
 744                 return 0; /* would be a no op, no sense sending this */
 745
 746         tlink = cifs_sb_tlink(cifs_sb);
 747         if (IS_ERR(tlink))
 748                 return PTR_ERR(tlink);
 749         tcon = tlink_tcon(tlink);
 750
 751         cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 752         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 753                               FILE_WRITE_ATTRIBUTES, FILE_OPEN,
 754                               0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, cfile,
 755                               NULL, NULL);
 756         cifs_put_tlink(tlink);
 757         return rc;
 758 }