fs/smb/client/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 static inline __u32 file_create_options(struct dentry *dentry)
  39 {
  40         struct cifsInodeInfo *ci;
  41
  42         if (dentry) {
  43                 ci = CIFS_I(d_inode(dentry));
  44                 if (ci->cifsAttrs & ATTR_REPARSE)
  45                         return OPEN_REPARSE_POINT;
  46         }
  47         return 0;
  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  * If passing @out_iov and @out_buftype, ensure to make them both large enough
  55  * (>= 3) to hold all compounded responses.  Caller is also responsible for
  56  * freeing them up with free_rsp_buf().
  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                             __u8 **extbuf, size_t *extbuflen,
  63                             struct kvec *out_iov, int *out_buftype)
  64 {
  65         struct smb2_compound_vars *vars = NULL;
  66         struct kvec *rsp_iov;
  67         struct smb_rqst *rqst;
  68         int rc;
  69         __le16 *utf16_path = NULL;
  70         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
  71         struct cifs_fid fid;
  72         struct cifs_ses *ses = tcon->ses;
  73         struct TCP_Server_Info *server;
  74         int num_rqst = 0;
  75         int resp_buftype[3];
  76         struct smb2_query_info_rsp *qi_rsp = NULL;
  77         struct cifs_open_info_data *idata;
  78         int flags = 0;
  79         __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
  80         unsigned int size[2];
  81         void *data[2];
  82         int len;
  83
  84         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
  85         if (vars == NULL)
  86                 return -ENOMEM;
  87         rqst = &vars->rqst[0];
  88         rsp_iov = &vars->rsp_iov[0];
  89
  90         server = cifs_pick_channel(ses);
  91
  92         if (smb3_encryption_required(tcon))
  93                 flags |= CIFS_TRANSFORM_REQ;
  94
  95         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
  96
  97         /* We already have a handle so we can skip the open */
  98         if (cfile)
  99                 goto after_open;
 100
 101         /* Open */
 102         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 103         if (!utf16_path) {
 104                 rc = -ENOMEM;
 105                 goto finished;
 106         }
 107
 108         vars->oparms = (struct cifs_open_parms) {
 109                 .tcon = tcon,
 110                 .path = full_path,
 111                 .desired_access = desired_access,
 112                 .disposition = create_disposition,
 113                 .create_options = cifs_create_options(cifs_sb, create_options),
 114                 .fid = &fid,
 115                 .mode = mode,
 116                 .cifs_sb = cifs_sb,
 117         };
 118
 119         rqst[num_rqst].rq_iov = &vars->open_iov[0];
 120         rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
 121         rc = SMB2_open_init(tcon, server,
 122                             &rqst[num_rqst], &oplock, &vars->oparms,
 123                             utf16_path);
 124         kfree(utf16_path);
 125         if (rc)
 126                 goto finished;
 127
 128         smb2_set_next_command(tcon, &rqst[num_rqst]);
 129  after_open:
 130         num_rqst++;
 131         rc = 0;
 132
 133         /* Operation */
 134         switch (command) {
 135         case SMB2_OP_QUERY_INFO:
 136                 rqst[num_rqst].rq_iov = &vars->qi_iov;
 137                 rqst[num_rqst].rq_nvec = 1;
 138
 139                 if (cfile)
 140                         rc = SMB2_query_info_init(tcon, server,
 141                                 &rqst[num_rqst],
 142                                 cfile->fid.persistent_fid,
 143                                 cfile->fid.volatile_fid,
 144                                 FILE_ALL_INFORMATION,
 145                                 SMB2_O_INFO_FILE, 0,
 146                                 sizeof(struct smb2_file_all_info) +
 147                                           PATH_MAX * 2, 0, NULL);
 148                 else {
 149                         rc = SMB2_query_info_init(tcon, server,
 150                                 &rqst[num_rqst],
 151                                 COMPOUND_FID,
 152                                 COMPOUND_FID,
 153                                 FILE_ALL_INFORMATION,
 154                                 SMB2_O_INFO_FILE, 0,
 155                                 sizeof(struct smb2_file_all_info) +
 156                                           PATH_MAX * 2, 0, NULL);
 157                         if (!rc) {
 158                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 159                                 smb2_set_related(&rqst[num_rqst]);
 160                         }
 161                 }
 162
 163                 if (rc)
 164                         goto finished;
 165                 num_rqst++;
 166                 trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
 167                                                      full_path);
 168                 break;
 169         case SMB2_OP_POSIX_QUERY_INFO:
 170                 rqst[num_rqst].rq_iov = &vars->qi_iov;
 171                 rqst[num_rqst].rq_nvec = 1;
 172
 173                 if (cfile)
 174                         rc = SMB2_query_info_init(tcon, server,
 175                                 &rqst[num_rqst],
 176                                 cfile->fid.persistent_fid,
 177                                 cfile->fid.volatile_fid,
 178                                 SMB_FIND_FILE_POSIX_INFO,
 179                                 SMB2_O_INFO_FILE, 0,
 180                                 /* TBD: fix following to allow for longer SIDs */
 181                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 182                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 183                 else {
 184                         rc = SMB2_query_info_init(tcon, server,
 185                                 &rqst[num_rqst],
 186                                 COMPOUND_FID,
 187                                 COMPOUND_FID,
 188                                 SMB_FIND_FILE_POSIX_INFO,
 189                                 SMB2_O_INFO_FILE, 0,
 190                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 191                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 192                         if (!rc) {
 193                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 194                                 smb2_set_related(&rqst[num_rqst]);
 195                         }
 196                 }
 197
 198                 if (rc)
 199                         goto finished;
 200                 num_rqst++;
 201                 trace_smb3_posix_query_info_compound_enter(xid, ses->Suid, tcon->tid, full_path);
 202                 break;
 203         case SMB2_OP_DELETE:
 204                 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
 205                 break;
 206         case SMB2_OP_MKDIR:
 207                 /*
 208                  * Directories are created through parameters in the
 209                  * SMB2_open() call.
 210                  */
 211                 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
 212                 break;
 213         case SMB2_OP_RMDIR:
 214                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 215                 rqst[num_rqst].rq_nvec = 1;
 216
 217                 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
 218                 data[0] = &delete_pending[0];
 219
 220                 rc = SMB2_set_info_init(tcon, server,
 221                                         &rqst[num_rqst], COMPOUND_FID,
 222                                         COMPOUND_FID, current->tgid,
 223                                         FILE_DISPOSITION_INFORMATION,
 224                                         SMB2_O_INFO_FILE, 0, data, size);
 225                 if (rc)
 226                         goto finished;
 227                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 228                 smb2_set_related(&rqst[num_rqst++]);
 229                 trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
 230                 break;
 231         case SMB2_OP_SET_EOF:
 232                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 233                 rqst[num_rqst].rq_nvec = 1;
 234
 235                 size[0] = 8; /* sizeof __le64 */
 236                 data[0] = ptr;
 237
 238                 if (cfile) {
 239                         rc = SMB2_set_info_init(tcon, server,
 240                                                 &rqst[num_rqst],
 241                                                 cfile->fid.persistent_fid,
 242                                                 cfile->fid.volatile_fid,
 243                                                 current->tgid,
 244                                                 FILE_END_OF_FILE_INFORMATION,
 245                                                 SMB2_O_INFO_FILE, 0,
 246                                                 data, size);
 247                 } else {
 248                         rc = SMB2_set_info_init(tcon, server,
 249                                                 &rqst[num_rqst],
 250                                                 COMPOUND_FID,
 251                                                 COMPOUND_FID,
 252                                                 current->tgid,
 253                                                 FILE_END_OF_FILE_INFORMATION,
 254                                                 SMB2_O_INFO_FILE, 0,
 255                                                 data, size);
 256                         if (!rc) {
 257                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 258                                 smb2_set_related(&rqst[num_rqst]);
 259                         }
 260                 }
 261                 if (rc)
 262                         goto finished;
 263                 num_rqst++;
 264                 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
 265                 break;
 266         case SMB2_OP_SET_INFO:
 267                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 268                 rqst[num_rqst].rq_nvec = 1;
 269
 270
 271                 size[0] = sizeof(FILE_BASIC_INFO);
 272                 data[0] = ptr;
 273
 274                 if (cfile)
 275                         rc = SMB2_set_info_init(tcon, server,
 276                                 &rqst[num_rqst],
 277                                 cfile->fid.persistent_fid,
 278                                 cfile->fid.volatile_fid, current->tgid,
 279                                 FILE_BASIC_INFORMATION,
 280                                 SMB2_O_INFO_FILE, 0, data, size);
 281                 else {
 282                         rc = SMB2_set_info_init(tcon, server,
 283                                 &rqst[num_rqst],
 284                                 COMPOUND_FID,
 285                                 COMPOUND_FID, current->tgid,
 286                                 FILE_BASIC_INFORMATION,
 287                                 SMB2_O_INFO_FILE, 0, data, size);
 288                         if (!rc) {
 289                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 290                                 smb2_set_related(&rqst[num_rqst]);
 291                         }
 292                 }
 293
 294                 if (rc)
 295                         goto finished;
 296                 num_rqst++;
 297                 trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
 298                                                    full_path);
 299                 break;
 300         case SMB2_OP_RENAME:
 301                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 302                 rqst[num_rqst].rq_nvec = 2;
 303
 304                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 305
 306                 vars->rename_info.ReplaceIfExists = 1;
 307                 vars->rename_info.RootDirectory = 0;
 308                 vars->rename_info.FileNameLength = cpu_to_le32(len);
 309
 310                 size[0] = sizeof(struct smb2_file_rename_info);
 311                 data[0] = &vars->rename_info;
 312
 313                 size[1] = len + 2 /* null */;
 314                 data[1] = (__le16 *)ptr;
 315
 316                 if (cfile)
 317                         rc = SMB2_set_info_init(tcon, server,
 318                                                 &rqst[num_rqst],
 319                                                 cfile->fid.persistent_fid,
 320                                                 cfile->fid.volatile_fid,
 321                                         current->tgid, FILE_RENAME_INFORMATION,
 322                                         SMB2_O_INFO_FILE, 0, data, size);
 323                 else {
 324                         rc = SMB2_set_info_init(tcon, server,
 325                                         &rqst[num_rqst],
 326                                         COMPOUND_FID, COMPOUND_FID,
 327                                         current->tgid, FILE_RENAME_INFORMATION,
 328                                         SMB2_O_INFO_FILE, 0, data, size);
 329                         if (!rc) {
 330                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 331                                 smb2_set_related(&rqst[num_rqst]);
 332                         }
 333                 }
 334                 if (rc)
 335                         goto finished;
 336                 num_rqst++;
 337                 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
 338                 break;
 339         case SMB2_OP_HARDLINK:
 340                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 341                 rqst[num_rqst].rq_nvec = 2;
 342
 343                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 344
 345                 vars->link_info.ReplaceIfExists = 0;
 346                 vars->link_info.RootDirectory = 0;
 347                 vars->link_info.FileNameLength = cpu_to_le32(len);
 348
 349                 size[0] = sizeof(struct smb2_file_link_info);
 350                 data[0] = &vars->link_info;
 351
 352                 size[1] = len + 2 /* null */;
 353                 data[1] = (__le16 *)ptr;
 354
 355                 rc = SMB2_set_info_init(tcon, server,
 356                                         &rqst[num_rqst], COMPOUND_FID,
 357                                         COMPOUND_FID, current->tgid,
 358                                         FILE_LINK_INFORMATION,
 359                                         SMB2_O_INFO_FILE, 0, data, size);
 360                 if (rc)
 361                         goto finished;
 362                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 363                 smb2_set_related(&rqst[num_rqst++]);
 364                 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
 365                 break;
 366         default:
 367                 cifs_dbg(VFS, "Invalid command\n");
 368                 rc = -EINVAL;
 369         }
 370         if (rc)
 371                 goto finished;
 372
 373         /* We already have a handle so we can skip the close */
 374         if (cfile)
 375                 goto after_close;
 376         /* Close */
 377         flags |= CIFS_CP_CREATE_CLOSE_OP;
 378         rqst[num_rqst].rq_iov = &vars->close_iov;
 379         rqst[num_rqst].rq_nvec = 1;
 380         rc = SMB2_close_init(tcon, server,
 381                              &rqst[num_rqst], COMPOUND_FID,
 382                              COMPOUND_FID, false);
 383         smb2_set_related(&rqst[num_rqst]);
 384         if (rc)
 385                 goto finished;
 386  after_close:
 387         num_rqst++;
 388
 389         if (cfile) {
 390                 rc = compound_send_recv(xid, ses, server,
 391                                         flags, num_rqst - 2,
 392                                         &rqst[1], &resp_buftype[1],
 393                                         &rsp_iov[1]);
 394         } else
 395                 rc = compound_send_recv(xid, ses, server,
 396                                         flags, num_rqst,
 397                                         rqst, resp_buftype,
 398                                         rsp_iov);
 399
 400  finished:
 401         SMB2_open_free(&rqst[0]);
 402         if (rc == -EREMCHG) {
 403                 pr_warn_once("server share %s deleted\n", tcon->tree_name);
 404                 tcon->need_reconnect = true;
 405         }
 406
 407         switch (command) {
 408         case SMB2_OP_QUERY_INFO:
 409                 idata = ptr;
 410                 if (rc == 0 && cfile && cfile->symlink_target) {
 411                         idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 412                         if (!idata->symlink_target)
 413                                 rc = -ENOMEM;
 414                 }
 415                 if (rc == 0) {
 416                         qi_rsp = (struct smb2_query_info_rsp *)
 417                                 rsp_iov[1].iov_base;
 418                         rc = smb2_validate_and_copy_iov(
 419                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 420                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 421                                 &rsp_iov[1], sizeof(idata->fi), (char *)&idata->fi);
 422                 }
 423                 if (rqst[1].rq_iov)
 424                         SMB2_query_info_free(&rqst[1]);
 425                 if (rqst[2].rq_iov)
 426                         SMB2_close_free(&rqst[2]);
 427                 if (rc)
 428                         trace_smb3_query_info_compound_err(xid,  ses->Suid,
 429                                                 tcon->tid, rc);
 430                 else
 431                         trace_smb3_query_info_compound_done(xid, ses->Suid,
 432                                                 tcon->tid);
 433                 break;
 434         case SMB2_OP_POSIX_QUERY_INFO:
 435                 idata = ptr;
 436                 if (rc == 0 && cfile && cfile->symlink_target) {
 437                         idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 438                         if (!idata->symlink_target)
 439                                 rc = -ENOMEM;
 440                 }
 441                 if (rc == 0) {
 442                         qi_rsp = (struct smb2_query_info_rsp *)
 443                                 rsp_iov[1].iov_base;
 444                         rc = smb2_validate_and_copy_iov(
 445                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 446                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 447                                 &rsp_iov[1], sizeof(idata->posix_fi) /* add SIDs */,
 448                                 (char *)&idata->posix_fi);
 449                 }
 450                 if (rc == 0) {
 451                         unsigned int length = le32_to_cpu(qi_rsp->OutputBufferLength);
 452
 453                         if (length > sizeof(idata->posix_fi)) {
 454                                 char *base = (char *)rsp_iov[1].iov_base +
 455                                         le16_to_cpu(qi_rsp->OutputBufferOffset) +
 456                                         sizeof(idata->posix_fi);
 457                                 *extbuflen = length - sizeof(idata->posix_fi);
 458                                 *extbuf = kmemdup(base, *extbuflen, GFP_KERNEL);
 459                                 if (!*extbuf)
 460                                         rc = -ENOMEM;
 461                         } else {
 462                                 rc = -EINVAL;
 463                         }
 464                 }
 465                 if (rqst[1].rq_iov)
 466                         SMB2_query_info_free(&rqst[1]);
 467                 if (rqst[2].rq_iov)
 468                         SMB2_close_free(&rqst[2]);
 469                 if (rc)
 470                         trace_smb3_posix_query_info_compound_err(xid,  ses->Suid, tcon->tid, rc);
 471                 else
 472                         trace_smb3_posix_query_info_compound_done(xid, ses->Suid, tcon->tid);
 473                 break;
 474         case SMB2_OP_DELETE:
 475                 if (rc)
 476                         trace_smb3_delete_err(xid,  ses->Suid, tcon->tid, rc);
 477                 else
 478                         trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
 479                 if (rqst[1].rq_iov)
 480                         SMB2_close_free(&rqst[1]);
 481                 break;
 482         case SMB2_OP_MKDIR:
 483                 if (rc)
 484                         trace_smb3_mkdir_err(xid,  ses->Suid, tcon->tid, rc);
 485                 else
 486                         trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
 487                 if (rqst[1].rq_iov)
 488                         SMB2_close_free(&rqst[1]);
 489                 break;
 490         case SMB2_OP_HARDLINK:
 491                 if (rc)
 492                         trace_smb3_hardlink_err(xid,  ses->Suid, tcon->tid, rc);
 493                 else
 494                         trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
 495                 free_set_inf_compound(rqst);
 496                 break;
 497         case SMB2_OP_RENAME:
 498                 if (rc)
 499                         trace_smb3_rename_err(xid,  ses->Suid, tcon->tid, rc);
 500                 else
 501                         trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
 502                 free_set_inf_compound(rqst);
 503                 break;
 504         case SMB2_OP_RMDIR:
 505                 if (rc)
 506                         trace_smb3_rmdir_err(xid,  ses->Suid, tcon->tid, rc);
 507                 else
 508                         trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
 509                 free_set_inf_compound(rqst);
 510                 break;
 511         case SMB2_OP_SET_EOF:
 512                 if (rc)
 513                         trace_smb3_set_eof_err(xid,  ses->Suid, tcon->tid, rc);
 514                 else
 515                         trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
 516                 free_set_inf_compound(rqst);
 517                 break;
 518         case SMB2_OP_SET_INFO:
 519                 if (rc)
 520                         trace_smb3_set_info_compound_err(xid,  ses->Suid,
 521                                                 tcon->tid, rc);
 522                 else
 523                         trace_smb3_set_info_compound_done(xid, ses->Suid,
 524                                                 tcon->tid);
 525                 free_set_inf_compound(rqst);
 526                 break;
 527         }
 528
 529         if (cfile)
 530                 cifsFileInfo_put(cfile);
 531
 532         if (out_iov && out_buftype) {
 533                 memcpy(out_iov, rsp_iov, 3 * sizeof(*out_iov));
 534                 memcpy(out_buftype, resp_buftype, 3 * sizeof(*out_buftype));
 535         } else {
 536                 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 537                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 538                 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
 539         }
 540         kfree(vars);
 541         return rc;
 542 }
 543
 544 static int parse_create_response(struct cifs_open_info_data *data,
 545                                  struct cifs_sb_info *cifs_sb,
 546                                  const struct kvec *iov)
 547 {
 548         struct smb2_create_rsp *rsp = iov->iov_base;
 549         bool reparse_point = false;
 550         u32 tag = 0;
 551         int rc = 0;
 552
 553         switch (rsp->hdr.Status) {
 554         case STATUS_IO_REPARSE_TAG_NOT_HANDLED:
 555                 reparse_point = true;
 556                 break;
 557         case STATUS_STOPPED_ON_SYMLINK:
 558                 rc = smb2_parse_symlink_response(cifs_sb, iov,
 559                                                  &data->symlink_target);
 560                 if (rc)
 561                         return rc;
 562                 tag = IO_REPARSE_TAG_SYMLINK;
 563                 reparse_point = true;
 564                 break;
 565         case STATUS_SUCCESS:
 566                 reparse_point = !!(rsp->Flags & SMB2_CREATE_FLAG_REPARSEPOINT);
 567                 break;
 568         }
 569         data->reparse_point = reparse_point;
 570         data->reparse.tag = tag;
 571         return rc;
 572 }
 573
 574 int smb2_query_path_info(const unsigned int xid,
 575                          struct cifs_tcon *tcon,
 576                          struct cifs_sb_info *cifs_sb,
 577                          const char *full_path,
 578                          struct cifs_open_info_data *data)
 579 {
 580         __u32 create_options = 0;
 581         struct cifsFileInfo *cfile;
 582         struct cached_fid *cfid = NULL;
 583         struct smb2_hdr *hdr;
 584         struct kvec out_iov[3] = {};
 585         int out_buftype[3] = {};
 586         bool islink;
 587         int rc, rc2;
 588
 589         data->adjust_tz = false;
 590         data->reparse_point = false;
 591
 592         if (strcmp(full_path, ""))
 593                 rc = -ENOENT;
 594         else
 595                 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, false, &cfid);
 596         /* If it is a root and its handle is cached then use it */
 597         if (!rc) {
 598                 if (cfid->file_all_info_is_valid) {
 599                         memcpy(&data->fi, &cfid->file_all_info, sizeof(data->fi));
 600                 } else {
 601                         rc = SMB2_query_info(xid, tcon, cfid->fid.persistent_fid,
 602                                              cfid->fid.volatile_fid, &data->fi);
 603                 }
 604                 close_cached_dir(cfid);
 605                 return rc;
 606         }
 607
 608         cifs_get_readable_path(tcon, full_path, &cfile);
 609         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN,
 610                               create_options, ACL_NO_MODE, data, SMB2_OP_QUERY_INFO, cfile,
 611                               NULL, NULL, out_iov, out_buftype);
 612         hdr = out_iov[0].iov_base;
 613         /*
 614          * If first iov is unset, then SMB session was dropped or we've got a
 615          * cached open file (@cfile).
 616          */
 617         if (!hdr || out_buftype[0] == CIFS_NO_BUFFER)
 618                 goto out;
 619
 620         switch (rc) {
 621         case 0:
 622         case -EOPNOTSUPP:
 623                 rc = parse_create_response(data, cifs_sb, &out_iov[0]);
 624                 if (rc || !data->reparse_point)
 625                         goto out;
 626
 627                 create_options |= OPEN_REPARSE_POINT;
 628                 /* Failed on a symbolic link - query a reparse point info */
 629                 cifs_get_readable_path(tcon, full_path, &cfile);
 630                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 631                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 632                                       create_options, ACL_NO_MODE, data,
 633                                       SMB2_OP_QUERY_INFO, cfile, NULL, NULL,
 634                                       NULL, NULL);
 635                 break;
 636         case -EREMOTE:
 637                 break;
 638         default:
 639                 if (hdr->Status != STATUS_OBJECT_NAME_INVALID)
 640                         break;
 641                 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
 642                                                      full_path, &islink);
 643                 if (rc2) {
 644                         rc = rc2;
 645                         goto out;
 646                 }
 647                 if (islink)
 648                         rc = -EREMOTE;
 649         }
 650
 651 out:
 652         free_rsp_buf(out_buftype[0], out_iov[0].iov_base);
 653         free_rsp_buf(out_buftype[1], out_iov[1].iov_base);
 654         free_rsp_buf(out_buftype[2], out_iov[2].iov_base);
 655         return rc;
 656 }
 657
 658 int smb311_posix_query_path_info(const unsigned int xid,
 659                                  struct cifs_tcon *tcon,
 660                                  struct cifs_sb_info *cifs_sb,
 661                                  const char *full_path,
 662                                  struct cifs_open_info_data *data,
 663                                  struct cifs_sid *owner,
 664                                  struct cifs_sid *group)
 665 {
 666         int rc;
 667         __u32 create_options = 0;
 668         struct cifsFileInfo *cfile;
 669         struct kvec out_iov[3] = {};
 670         int out_buftype[3] = {};
 671         __u8 *sidsbuf = NULL;
 672         __u8 *sidsbuf_end = NULL;
 673         size_t sidsbuflen = 0;
 674         size_t owner_len, group_len;
 675
 676         data->adjust_tz = false;
 677         data->reparse_point = false;
 678
 679         /*
 680          * BB TODO: Add support for using the cached root handle.
 681          * Create SMB2_query_posix_info worker function to do non-compounded query
 682          * when we already have an open file handle for this. For now this is fast enough
 683          * (always using the compounded version).
 684          */
 685
 686         cifs_get_readable_path(tcon, full_path, &cfile);
 687         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN,
 688                               create_options, ACL_NO_MODE, data, SMB2_OP_POSIX_QUERY_INFO, cfile,
 689                               &sidsbuf, &sidsbuflen, out_iov, out_buftype);
 690         /*
 691          * If first iov is unset, then SMB session was dropped or we've got a
 692          * cached open file (@cfile).
 693          */
 694         if (!out_iov[0].iov_base || out_buftype[0] == CIFS_NO_BUFFER)
 695                 goto out;
 696
 697         switch (rc) {
 698         case 0:
 699         case -EOPNOTSUPP:
 700                 /* BB TODO: When support for special files added to Samba re-verify this path */
 701                 rc = parse_create_response(data, cifs_sb, &out_iov[0]);
 702                 if (rc || !data->reparse_point)
 703                         goto out;
 704
 705                 create_options |= OPEN_REPARSE_POINT;
 706                 /* Failed on a symbolic link - query a reparse point info */
 707                 cifs_get_readable_path(tcon, full_path, &cfile);
 708                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES,
 709                                       FILE_OPEN, create_options, ACL_NO_MODE, data,
 710                                       SMB2_OP_POSIX_QUERY_INFO, cfile,
 711                                       &sidsbuf, &sidsbuflen, NULL, NULL);
 712                 break;
 713         }
 714
 715 out:
 716         if (rc == 0) {
 717                 sidsbuf_end = sidsbuf + sidsbuflen;
 718
 719                 owner_len = posix_info_sid_size(sidsbuf, sidsbuf_end);
 720                 if (owner_len == -1) {
 721                         rc = -EINVAL;
 722                         goto out;
 723                 }
 724                 memcpy(owner, sidsbuf, owner_len);
 725
 726                 group_len = posix_info_sid_size(
 727                         sidsbuf + owner_len, sidsbuf_end);
 728                 if (group_len == -1) {
 729                         rc = -EINVAL;
 730                         goto out;
 731                 }
 732                 memcpy(group, sidsbuf + owner_len, group_len);
 733         }
 734
 735         kfree(sidsbuf);
 736         free_rsp_buf(out_buftype[0], out_iov[0].iov_base);
 737         free_rsp_buf(out_buftype[1], out_iov[1].iov_base);
 738         free_rsp_buf(out_buftype[2], out_iov[2].iov_base);
 739         return rc;
 740 }
 741
 742 int
 743 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
 744            struct cifs_tcon *tcon, const char *name,
 745            struct cifs_sb_info *cifs_sb)
 746 {
 747         return smb2_compound_op(xid, tcon, cifs_sb, name,
 748                                 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 749                                 CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR,
 750                                 NULL, NULL, NULL, NULL, NULL);
 751 }
 752
 753 void
 754 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 755                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 756                    const unsigned int xid)
 757 {
 758         FILE_BASIC_INFO data;
 759         struct cifsInodeInfo *cifs_i;
 760         struct cifsFileInfo *cfile;
 761         u32 dosattrs;
 762         int tmprc;
 763
 764         memset(&data, 0, sizeof(data));
 765         cifs_i = CIFS_I(inode);
 766         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 767         data.Attributes = cpu_to_le32(dosattrs);
 768         cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
 769         tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
 770                                  FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 771                                  CREATE_NOT_FILE, ACL_NO_MODE,
 772                                  &data, SMB2_OP_SET_INFO, cfile, NULL, NULL, NULL, NULL);
 773         if (tmprc == 0)
 774                 cifs_i->cifsAttrs = dosattrs;
 775 }
 776
 777 int
 778 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 779            struct cifs_sb_info *cifs_sb)
 780 {
 781         drop_cached_dir_by_name(xid, tcon, name, cifs_sb);
 782         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 783                                 CREATE_NOT_FILE, ACL_NO_MODE,
 784                                 NULL, SMB2_OP_RMDIR, NULL, NULL, NULL, NULL, NULL);
 785 }
 786
 787 int
 788 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 789             struct cifs_sb_info *cifs_sb)
 790 {
 791         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 792                                 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
 793                                 ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL, NULL, NULL, NULL, NULL);
 794 }
 795
 796 static int smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 797                               const char *from_name, const char *to_name,
 798                               struct cifs_sb_info *cifs_sb,
 799                               __u32 create_options, __u32 access,
 800                               int command, struct cifsFileInfo *cfile)
 801 {
 802         __le16 *smb2_to_name = NULL;
 803         int rc;
 804
 805         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 806         if (smb2_to_name == NULL) {
 807                 rc = -ENOMEM;
 808                 goto smb2_rename_path;
 809         }
 810         rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
 811                               FILE_OPEN, create_options, ACL_NO_MODE, smb2_to_name,
 812                               command, cfile, NULL, NULL, NULL, NULL);
 813 smb2_rename_path:
 814         kfree(smb2_to_name);
 815         return rc;
 816 }
 817
 818 int smb2_rename_path(const unsigned int xid,
 819                      struct cifs_tcon *tcon,
 820                      struct dentry *source_dentry,
 821                      const char *from_name, const char *to_name,
 822                      struct cifs_sb_info *cifs_sb)
 823 {
 824         struct cifsFileInfo *cfile;
 825         __u32 co = file_create_options(source_dentry);
 826
 827         drop_cached_dir_by_name(xid, tcon, from_name, cifs_sb);
 828         cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
 829
 830         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 831                                   co, DELETE, SMB2_OP_RENAME, cfile);
 832 }
 833
 834 int smb2_create_hardlink(const unsigned int xid,
 835                          struct cifs_tcon *tcon,
 836                          struct dentry *source_dentry,
 837                          const char *from_name, const char *to_name,
 838                          struct cifs_sb_info *cifs_sb)
 839 {
 840         __u32 co = file_create_options(source_dentry);
 841
 842         return smb2_set_path_attr(xid, tcon, from_name, to_name,
 843                                   cifs_sb, co, FILE_READ_ATTRIBUTES,
 844                                   SMB2_OP_HARDLINK, NULL);
 845 }
 846
 847 int
 848 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 849                    const char *full_path, __u64 size,
 850                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 851 {
 852         __le64 eof = cpu_to_le64(size);
 853         struct cifsFileInfo *cfile;
 854
 855         cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 856         return smb2_compound_op(xid, tcon, cifs_sb, full_path,
 857                                 FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE,
 858                                 &eof, SMB2_OP_SET_EOF, cfile, NULL, NULL, NULL, NULL);
 859 }
 860
 861 int
 862 smb2_set_file_info(struct inode *inode, const char *full_path,
 863                    FILE_BASIC_INFO *buf, const unsigned int xid)
 864 {
 865         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 866         struct tcon_link *tlink;
 867         struct cifs_tcon *tcon;
 868         struct cifsFileInfo *cfile;
 869         int rc;
 870
 871         if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
 872             (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
 873             (buf->Attributes == 0))
 874                 return 0; /* would be a no op, no sense sending this */
 875
 876         tlink = cifs_sb_tlink(cifs_sb);
 877         if (IS_ERR(tlink))
 878                 return PTR_ERR(tlink);
 879         tcon = tlink_tcon(tlink);
 880
 881         cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 882         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 883                               FILE_WRITE_ATTRIBUTES, FILE_OPEN,
 884                               0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, cfile,
 885                               NULL, NULL, NULL, NULL);
 886         cifs_put_tlink(tlink);
 887         return rc;
 888 }