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 struct reparse_data_buffer *reparse_buf_ptr(struct kvec *iov)
  30 {
  31         struct reparse_data_buffer *buf;
  32         struct smb2_ioctl_rsp *io = iov->iov_base;
  33         u32 off, count, len;
  34
  35         count = le32_to_cpu(io->OutputCount);
  36         off = le32_to_cpu(io->OutputOffset);
  37         if (check_add_overflow(off, count, &len) || len > iov->iov_len)
  38                 return ERR_PTR(-EIO);
  39
  40         buf = (struct reparse_data_buffer *)((u8 *)io + off);
  41         len = sizeof(*buf);
  42         if (count < len || count < le16_to_cpu(buf->ReparseDataLength) + len)
  43                 return ERR_PTR(-EIO);
  44         return buf;
  45 }
  46
  47 static inline __u32 file_create_options(struct dentry *dentry)
  48 {
  49         struct cifsInodeInfo *ci;
  50
  51         if (dentry) {
  52                 ci = CIFS_I(d_inode(dentry));
  53                 if (ci->cifsAttrs & ATTR_REPARSE)
  54                         return OPEN_REPARSE_POINT;
  55         }
  56         return 0;
  57 }
  58
  59 /* Parse owner and group from SMB3.1.1 POSIX query info */
  60 static int parse_posix_sids(struct cifs_open_info_data *data,
  61                             struct kvec *rsp_iov)
  62 {
  63         struct smb2_query_info_rsp *qi = rsp_iov->iov_base;
  64         unsigned int out_len = le32_to_cpu(qi->OutputBufferLength);
  65         unsigned int qi_len = sizeof(data->posix_fi);
  66         int owner_len, group_len;
  67         u8 *sidsbuf, *sidsbuf_end;
  68
  69         if (out_len <= qi_len)
  70                 return -EINVAL;
  71
  72         sidsbuf = (u8 *)qi + le16_to_cpu(qi->OutputBufferOffset) + qi_len;
  73         sidsbuf_end = sidsbuf + out_len - qi_len;
  74
  75         owner_len = posix_info_sid_size(sidsbuf, sidsbuf_end);
  76         if (owner_len == -1)
  77                 return -EINVAL;
  78
  79         memcpy(&data->posix_owner, sidsbuf, owner_len);
  80         group_len = posix_info_sid_size(sidsbuf + owner_len, sidsbuf_end);
  81         if (group_len == -1)
  82                 return -EINVAL;
  83
  84         memcpy(&data->posix_group, sidsbuf + owner_len, group_len);
  85         return 0;
  86 }
  87
  88 /*
  89  * note: If cfile is passed, the reference to it is dropped here.
  90  * So make sure that you do not reuse cfile after return from this func.
  91  *
  92  * If passing @out_iov and @out_buftype, ensure to make them both large enough
  93  * (>= 3) to hold all compounded responses.  Caller is also responsible for
  94  * freeing them up with free_rsp_buf().
  95  */
  96 static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
  97                             struct cifs_sb_info *cifs_sb, const char *full_path,
  98                             __u32 desired_access, __u32 create_disposition,
  99                             __u32 create_options, umode_t mode, struct kvec *in_iov,
 100                             int *cmds, int num_cmds, struct cifsFileInfo *cfile,
 101                             struct kvec *out_iov, int *out_buftype)
 102 {
 103
 104         struct reparse_data_buffer *rbuf;
 105         struct smb2_compound_vars *vars = NULL;
 106         struct kvec *rsp_iov, *iov;
 107         struct smb_rqst *rqst;
 108         int rc;
 109         __le16 *utf16_path = NULL;
 110         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 111         struct cifs_fid fid;
 112         struct cifs_ses *ses = tcon->ses;
 113         struct TCP_Server_Info *server;
 114         int num_rqst = 0, i;
 115         int resp_buftype[MAX_COMPOUND];
 116         struct smb2_query_info_rsp *qi_rsp = NULL;
 117         struct cifs_open_info_data *idata;
 118         int flags = 0;
 119         __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
 120         unsigned int size[2];
 121         void *data[2];
 122         int len;
 123         int retries = 0, cur_sleep = 1;
 124
 125 replay_again:
 126         /* reinitialize for possible replay */
 127         flags = 0;
 128         oplock = SMB2_OPLOCK_LEVEL_NONE;
 129         num_rqst = 0;
 130         server = cifs_pick_channel(ses);
 131
 132         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
 133         if (vars == NULL)
 134                 return -ENOMEM;
 135         rqst = &vars->rqst[0];
 136         rsp_iov = &vars->rsp_iov[0];
 137
 138         if (smb3_encryption_required(tcon))
 139                 flags |= CIFS_TRANSFORM_REQ;
 140
 141         for (i = 0; i < ARRAY_SIZE(resp_buftype); i++)
 142                 resp_buftype[i] = CIFS_NO_BUFFER;
 143
 144         /* We already have a handle so we can skip the open */
 145         if (cfile)
 146                 goto after_open;
 147
 148         /* Open */
 149         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 150         if (!utf16_path) {
 151                 rc = -ENOMEM;
 152                 goto finished;
 153         }
 154
 155         vars->oparms = (struct cifs_open_parms) {
 156                 .tcon = tcon,
 157                 .path = full_path,
 158                 .desired_access = desired_access,
 159                 .disposition = create_disposition,
 160                 .create_options = cifs_create_options(cifs_sb, create_options),
 161                 .fid = &fid,
 162                 .mode = mode,
 163                 .cifs_sb = cifs_sb,
 164         };
 165
 166         rqst[num_rqst].rq_iov = &vars->open_iov[0];
 167         rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
 168         rc = SMB2_open_init(tcon, server,
 169                             &rqst[num_rqst], &oplock, &vars->oparms,
 170                             utf16_path);
 171         kfree(utf16_path);
 172         if (rc)
 173                 goto finished;
 174
 175         smb2_set_next_command(tcon, &rqst[num_rqst]);
 176  after_open:
 177         num_rqst++;
 178         rc = 0;
 179
 180         for (i = 0; i < num_cmds; i++) {
 181                 /* Operation */
 182                 switch (cmds[i]) {
 183                 case SMB2_OP_QUERY_INFO:
 184                         rqst[num_rqst].rq_iov = &vars->qi_iov;
 185                         rqst[num_rqst].rq_nvec = 1;
 186
 187                         if (cfile) {
 188                                 rc = SMB2_query_info_init(tcon, server,
 189                                                           &rqst[num_rqst],
 190                                                           cfile->fid.persistent_fid,
 191                                                           cfile->fid.volatile_fid,
 192                                                           FILE_ALL_INFORMATION,
 193                                                           SMB2_O_INFO_FILE, 0,
 194                                                           sizeof(struct smb2_file_all_info) +
 195                                                           PATH_MAX * 2, 0, NULL);
 196                         } else {
 197                                 rc = SMB2_query_info_init(tcon, server,
 198                                                           &rqst[num_rqst],
 199                                                           COMPOUND_FID,
 200                                                           COMPOUND_FID,
 201                                                           FILE_ALL_INFORMATION,
 202                                                           SMB2_O_INFO_FILE, 0,
 203                                                           sizeof(struct smb2_file_all_info) +
 204                                                           PATH_MAX * 2, 0, NULL);
 205                                 if (!rc) {
 206                                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 207                                         smb2_set_related(&rqst[num_rqst]);
 208                                 }
 209                         }
 210
 211                         if (rc)
 212                                 goto finished;
 213                         num_rqst++;
 214                         trace_smb3_query_info_compound_enter(xid, ses->Suid,
 215                                                              tcon->tid, full_path);
 216                         break;
 217                 case SMB2_OP_POSIX_QUERY_INFO:
 218                         rqst[num_rqst].rq_iov = &vars->qi_iov;
 219                         rqst[num_rqst].rq_nvec = 1;
 220
 221                         if (cfile) {
 222                                 /* TBD: fix following to allow for longer SIDs */
 223                                 rc = SMB2_query_info_init(tcon, server,
 224                                                           &rqst[num_rqst],
 225                                                           cfile->fid.persistent_fid,
 226                                                           cfile->fid.volatile_fid,
 227                                                           SMB_FIND_FILE_POSIX_INFO,
 228                                                           SMB2_O_INFO_FILE, 0,
 229                                                           sizeof(struct smb311_posix_qinfo *) +
 230                                                           (PATH_MAX * 2) +
 231                                                           (sizeof(struct cifs_sid) * 2), 0, NULL);
 232                         } else {
 233                                 rc = SMB2_query_info_init(tcon, server,
 234                                                           &rqst[num_rqst],
 235                                                           COMPOUND_FID,
 236                                                           COMPOUND_FID,
 237                                                           SMB_FIND_FILE_POSIX_INFO,
 238                                                           SMB2_O_INFO_FILE, 0,
 239                                                           sizeof(struct smb311_posix_qinfo *) +
 240                                                           (PATH_MAX * 2) +
 241                                                           (sizeof(struct cifs_sid) * 2), 0, NULL);
 242                                 if (!rc) {
 243                                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 244                                         smb2_set_related(&rqst[num_rqst]);
 245                                 }
 246                         }
 247
 248                         if (rc)
 249                                 goto finished;
 250                         num_rqst++;
 251                         trace_smb3_posix_query_info_compound_enter(xid, ses->Suid,
 252                                                                    tcon->tid, full_path);
 253                         break;
 254                 case SMB2_OP_DELETE:
 255                         trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
 256                         break;
 257                 case SMB2_OP_MKDIR:
 258                         /*
 259                          * Directories are created through parameters in the
 260                          * SMB2_open() call.
 261                          */
 262                         trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
 263                         break;
 264                 case SMB2_OP_RMDIR:
 265                         rqst[num_rqst].rq_iov = &vars->si_iov[0];
 266                         rqst[num_rqst].rq_nvec = 1;
 267
 268                         size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
 269                         data[0] = &delete_pending[0];
 270
 271                         rc = SMB2_set_info_init(tcon, server,
 272                                                 &rqst[num_rqst], COMPOUND_FID,
 273                                                 COMPOUND_FID, current->tgid,
 274                                                 FILE_DISPOSITION_INFORMATION,
 275                                                 SMB2_O_INFO_FILE, 0, data, size);
 276                         if (rc)
 277                                 goto finished;
 278                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 279                         smb2_set_related(&rqst[num_rqst++]);
 280                         trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
 281                         break;
 282                 case SMB2_OP_SET_EOF:
 283                         rqst[num_rqst].rq_iov = &vars->si_iov[0];
 284                         rqst[num_rqst].rq_nvec = 1;
 285
 286                         size[0] = in_iov[i].iov_len;
 287                         data[0] = in_iov[i].iov_base;
 288
 289                         if (cfile) {
 290                                 rc = SMB2_set_info_init(tcon, server,
 291                                                         &rqst[num_rqst],
 292                                                         cfile->fid.persistent_fid,
 293                                                         cfile->fid.volatile_fid,
 294                                                         current->tgid,
 295                                                         FILE_END_OF_FILE_INFORMATION,
 296                                                         SMB2_O_INFO_FILE, 0,
 297                                                         data, size);
 298                         } else {
 299                                 rc = SMB2_set_info_init(tcon, server,
 300                                                         &rqst[num_rqst],
 301                                                         COMPOUND_FID,
 302                                                         COMPOUND_FID,
 303                                                         current->tgid,
 304                                                         FILE_END_OF_FILE_INFORMATION,
 305                                                         SMB2_O_INFO_FILE, 0,
 306                                                         data, size);
 307                                 if (!rc) {
 308                                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 309                                         smb2_set_related(&rqst[num_rqst]);
 310                                 }
 311                         }
 312                         if (rc)
 313                                 goto finished;
 314                         num_rqst++;
 315                         trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
 316                         break;
 317                 case SMB2_OP_SET_INFO:
 318                         rqst[num_rqst].rq_iov = &vars->si_iov[0];
 319                         rqst[num_rqst].rq_nvec = 1;
 320
 321                         size[0] = in_iov[i].iov_len;
 322                         data[0] = in_iov[i].iov_base;
 323
 324                         if (cfile) {
 325                                 rc = SMB2_set_info_init(tcon, server,
 326                                                         &rqst[num_rqst],
 327                                                         cfile->fid.persistent_fid,
 328                                                         cfile->fid.volatile_fid, current->tgid,
 329                                                         FILE_BASIC_INFORMATION,
 330                                                         SMB2_O_INFO_FILE, 0, data, size);
 331                         } else {
 332                                 rc = SMB2_set_info_init(tcon, server,
 333                                                         &rqst[num_rqst],
 334                                                         COMPOUND_FID,
 335                                                         COMPOUND_FID, current->tgid,
 336                                                         FILE_BASIC_INFORMATION,
 337                                                         SMB2_O_INFO_FILE, 0, data, size);
 338                                 if (!rc) {
 339                                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 340                                         smb2_set_related(&rqst[num_rqst]);
 341                                 }
 342                         }
 343
 344                         if (rc)
 345                                 goto finished;
 346                         num_rqst++;
 347                         trace_smb3_set_info_compound_enter(xid, ses->Suid,
 348                                                            tcon->tid, full_path);
 349                         break;
 350                 case SMB2_OP_RENAME:
 351                         rqst[num_rqst].rq_iov = &vars->si_iov[0];
 352                         rqst[num_rqst].rq_nvec = 2;
 353
 354                         len = in_iov[i].iov_len;
 355
 356                         vars->rename_info.ReplaceIfExists = 1;
 357                         vars->rename_info.RootDirectory = 0;
 358                         vars->rename_info.FileNameLength = cpu_to_le32(len);
 359
 360                         size[0] = sizeof(struct smb2_file_rename_info);
 361                         data[0] = &vars->rename_info;
 362
 363                         size[1] = len + 2 /* null */;
 364                         data[1] = in_iov[i].iov_base;
 365
 366                         if (cfile) {
 367                                 rc = SMB2_set_info_init(tcon, server,
 368                                                         &rqst[num_rqst],
 369                                                         cfile->fid.persistent_fid,
 370                                                         cfile->fid.volatile_fid,
 371                                                         current->tgid, FILE_RENAME_INFORMATION,
 372                                                         SMB2_O_INFO_FILE, 0, data, size);
 373                         } else {
 374                                 rc = SMB2_set_info_init(tcon, server,
 375                                                         &rqst[num_rqst],
 376                                                         COMPOUND_FID, COMPOUND_FID,
 377                                                         current->tgid, FILE_RENAME_INFORMATION,
 378                                                         SMB2_O_INFO_FILE, 0, data, size);
 379                                 if (!rc) {
 380                                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 381                                         smb2_set_related(&rqst[num_rqst]);
 382                                 }
 383                         }
 384                         if (rc)
 385                                 goto finished;
 386                         num_rqst++;
 387                         trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
 388                         break;
 389                 case SMB2_OP_HARDLINK:
 390                         rqst[num_rqst].rq_iov = &vars->si_iov[0];
 391                         rqst[num_rqst].rq_nvec = 2;
 392
 393                         len = in_iov[i].iov_len;
 394
 395                         vars->link_info.ReplaceIfExists = 0;
 396                         vars->link_info.RootDirectory = 0;
 397                         vars->link_info.FileNameLength = cpu_to_le32(len);
 398
 399                         size[0] = sizeof(struct smb2_file_link_info);
 400                         data[0] = &vars->link_info;
 401
 402                         size[1] = len + 2 /* null */;
 403                         data[1] = in_iov[i].iov_base;
 404
 405                         rc = SMB2_set_info_init(tcon, server,
 406                                                 &rqst[num_rqst], COMPOUND_FID,
 407                                                 COMPOUND_FID, current->tgid,
 408                                                 FILE_LINK_INFORMATION,
 409                                                 SMB2_O_INFO_FILE, 0, data, size);
 410                         if (rc)
 411                                 goto finished;
 412                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 413                         smb2_set_related(&rqst[num_rqst++]);
 414                         trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
 415                         break;
 416                 case SMB2_OP_SET_REPARSE:
 417                         rqst[num_rqst].rq_iov = vars->io_iov;
 418                         rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov);
 419
 420                         rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
 421                                              COMPOUND_FID, COMPOUND_FID,
 422                                              FSCTL_SET_REPARSE_POINT,
 423                                              in_iov[i].iov_base,
 424                                              in_iov[i].iov_len, 0);
 425                         if (rc)
 426                                 goto finished;
 427                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 428                         smb2_set_related(&rqst[num_rqst++]);
 429                         trace_smb3_set_reparse_compound_enter(xid, ses->Suid,
 430                                                               tcon->tid, full_path);
 431                         break;
 432                 case SMB2_OP_GET_REPARSE:
 433                         rqst[num_rqst].rq_iov = vars->io_iov;
 434                         rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov);
 435
 436                         rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
 437                                              COMPOUND_FID, COMPOUND_FID,
 438                                              FSCTL_GET_REPARSE_POINT,
 439                                              NULL, 0, CIFSMaxBufSize);
 440                         if (rc)
 441                                 goto finished;
 442                         smb2_set_next_command(tcon, &rqst[num_rqst]);
 443                         smb2_set_related(&rqst[num_rqst++]);
 444                         trace_smb3_get_reparse_compound_enter(xid, ses->Suid,
 445                                                               tcon->tid, full_path);
 446                         break;
 447                 default:
 448                         cifs_dbg(VFS, "Invalid command\n");
 449                         rc = -EINVAL;
 450                 }
 451         }
 452         if (rc)
 453                 goto finished;
 454
 455         /* We already have a handle so we can skip the close */
 456         if (cfile)
 457                 goto after_close;
 458         /* Close */
 459         flags |= CIFS_CP_CREATE_CLOSE_OP;
 460         rqst[num_rqst].rq_iov = &vars->close_iov;
 461         rqst[num_rqst].rq_nvec = 1;
 462         rc = SMB2_close_init(tcon, server,
 463                              &rqst[num_rqst], COMPOUND_FID,
 464                              COMPOUND_FID, false);
 465         smb2_set_related(&rqst[num_rqst]);
 466         if (rc)
 467                 goto finished;
 468  after_close:
 469         num_rqst++;
 470
 471         if (cfile) {
 472                 if (retries)
 473                         for (i = 1; i < num_rqst - 2; i++)
 474                                 smb2_set_replay(server, &rqst[i]);
 475
 476                 rc = compound_send_recv(xid, ses, server,
 477                                         flags, num_rqst - 2,
 478                                         &rqst[1], &resp_buftype[1],
 479                                         &rsp_iov[1]);
 480         } else {
 481                 if (retries)
 482                         for (i = 0; i < num_rqst; i++)
 483                                 smb2_set_replay(server, &rqst[i]);
 484
 485                 rc = compound_send_recv(xid, ses, server,
 486                                         flags, num_rqst,
 487                                         rqst, resp_buftype,
 488                                         rsp_iov);
 489         }
 490
 491 finished:
 492         num_rqst = 0;
 493         SMB2_open_free(&rqst[num_rqst++]);
 494         if (rc == -EREMCHG) {
 495                 pr_warn_once("server share %s deleted\n", tcon->tree_name);
 496                 tcon->need_reconnect = true;
 497         }
 498
 499         for (i = 0; i < num_cmds; i++) {
 500                 switch (cmds[i]) {
 501                 case SMB2_OP_QUERY_INFO:
 502                         idata = in_iov[i].iov_base;
 503                         if (rc == 0 && cfile && cfile->symlink_target) {
 504                                 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 505                                 if (!idata->symlink_target)
 506                                         rc = -ENOMEM;
 507                         }
 508                         if (rc == 0) {
 509                                 qi_rsp = (struct smb2_query_info_rsp *)
 510                                         rsp_iov[i + 1].iov_base;
 511                                 rc = smb2_validate_and_copy_iov(
 512                                         le16_to_cpu(qi_rsp->OutputBufferOffset),
 513                                         le32_to_cpu(qi_rsp->OutputBufferLength),
 514                                         &rsp_iov[i + 1], sizeof(idata->fi), (char *)&idata->fi);
 515                         }
 516                         SMB2_query_info_free(&rqst[num_rqst++]);
 517                         if (rc)
 518                                 trace_smb3_query_info_compound_err(xid,  ses->Suid,
 519                                                                    tcon->tid, rc);
 520                         else
 521                                 trace_smb3_query_info_compound_done(xid, ses->Suid,
 522                                                                     tcon->tid);
 523                         break;
 524                 case SMB2_OP_POSIX_QUERY_INFO:
 525                         idata = in_iov[i].iov_base;
 526                         if (rc == 0 && cfile && cfile->symlink_target) {
 527                                 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 528                                 if (!idata->symlink_target)
 529                                         rc = -ENOMEM;
 530                         }
 531                         if (rc == 0) {
 532                                 qi_rsp = (struct smb2_query_info_rsp *)
 533                                         rsp_iov[i + 1].iov_base;
 534                                 rc = smb2_validate_and_copy_iov(
 535                                         le16_to_cpu(qi_rsp->OutputBufferOffset),
 536                                         le32_to_cpu(qi_rsp->OutputBufferLength),
 537                                         &rsp_iov[i + 1], sizeof(idata->posix_fi) /* add SIDs */,
 538                                         (char *)&idata->posix_fi);
 539                         }
 540                         if (rc == 0)
 541                                 rc = parse_posix_sids(idata, &rsp_iov[i + 1]);
 542
 543                         SMB2_query_info_free(&rqst[num_rqst++]);
 544                         if (rc)
 545                                 trace_smb3_posix_query_info_compound_err(xid,  ses->Suid,
 546                                                                          tcon->tid, rc);
 547                         else
 548                                 trace_smb3_posix_query_info_compound_done(xid, ses->Suid,
 549                                                                           tcon->tid);
 550                         break;
 551                 case SMB2_OP_DELETE:
 552                         if (rc)
 553                                 trace_smb3_delete_err(xid,  ses->Suid, tcon->tid, rc);
 554                         else
 555                                 trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
 556                         break;
 557                 case SMB2_OP_MKDIR:
 558                         if (rc)
 559                                 trace_smb3_mkdir_err(xid,  ses->Suid, tcon->tid, rc);
 560                         else
 561                                 trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
 562                         break;
 563                 case SMB2_OP_HARDLINK:
 564                         if (rc)
 565                                 trace_smb3_hardlink_err(xid,  ses->Suid, tcon->tid, rc);
 566                         else
 567                                 trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
 568                         SMB2_set_info_free(&rqst[num_rqst++]);
 569                         break;
 570                 case SMB2_OP_RENAME:
 571                         if (rc)
 572                                 trace_smb3_rename_err(xid,  ses->Suid, tcon->tid, rc);
 573                         else
 574                                 trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
 575                         SMB2_set_info_free(&rqst[num_rqst++]);
 576                         break;
 577                 case SMB2_OP_RMDIR:
 578                         if (rc)
 579                                 trace_smb3_rmdir_err(xid,  ses->Suid, tcon->tid, rc);
 580                         else
 581                                 trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
 582                         SMB2_set_info_free(&rqst[num_rqst++]);
 583                         break;
 584                 case SMB2_OP_SET_EOF:
 585                         if (rc)
 586                                 trace_smb3_set_eof_err(xid,  ses->Suid, tcon->tid, rc);
 587                         else
 588                                 trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
 589                         SMB2_set_info_free(&rqst[num_rqst++]);
 590                         break;
 591                 case SMB2_OP_SET_INFO:
 592                         if (rc)
 593                                 trace_smb3_set_info_compound_err(xid,  ses->Suid,
 594                                                                  tcon->tid, rc);
 595                         else
 596                                 trace_smb3_set_info_compound_done(xid, ses->Suid,
 597                                                                   tcon->tid);
 598                         SMB2_set_info_free(&rqst[num_rqst++]);
 599                         break;
 600                 case SMB2_OP_SET_REPARSE:
 601                         if (rc) {
 602                                 trace_smb3_set_reparse_compound_err(xid,  ses->Suid,
 603                                                                     tcon->tid, rc);
 604                         } else {
 605                                 trace_smb3_set_reparse_compound_done(xid, ses->Suid,
 606                                                                      tcon->tid);
 607                         }
 608                         SMB2_ioctl_free(&rqst[num_rqst++]);
 609                         break;
 610                 case SMB2_OP_GET_REPARSE:
 611                         if (!rc) {
 612                                 iov = &rsp_iov[i + 1];
 613                                 idata = in_iov[i].iov_base;
 614                                 idata->reparse.io.iov = *iov;
 615                                 idata->reparse.io.buftype = resp_buftype[i + 1];
 616                                 rbuf = reparse_buf_ptr(iov);
 617                                 if (IS_ERR(rbuf)) {
 618                                         rc = PTR_ERR(rbuf);
 619                                         trace_smb3_set_reparse_compound_err(xid,  ses->Suid,
 620                                                                             tcon->tid, rc);
 621                                 } else {
 622                                         idata->reparse.tag = le32_to_cpu(rbuf->ReparseTag);
 623                                         trace_smb3_set_reparse_compound_done(xid, ses->Suid,
 624                                                                              tcon->tid);
 625                                 }
 626                                 memset(iov, 0, sizeof(*iov));
 627                                 resp_buftype[i + 1] = CIFS_NO_BUFFER;
 628                         } else {
 629                                 trace_smb3_set_reparse_compound_err(xid,  ses->Suid,
 630                                                                     tcon->tid, rc);
 631                         }
 632                         SMB2_ioctl_free(&rqst[num_rqst++]);
 633                         break;
 634                 }
 635         }
 636         SMB2_close_free(&rqst[num_rqst]);
 637
 638         num_cmds += 2;
 639         if (out_iov && out_buftype) {
 640                 memcpy(out_iov, rsp_iov, num_cmds * sizeof(*out_iov));
 641                 memcpy(out_buftype, resp_buftype,
 642                        num_cmds * sizeof(*out_buftype));
 643         } else {
 644                 for (i = 0; i < num_cmds; i++)
 645                         free_rsp_buf(resp_buftype[i], rsp_iov[i].iov_base);
 646         }
 647         num_cmds -= 2; /* correct num_cmds as there could be a retry */
 648         kfree(vars);
 649
 650         if (is_replayable_error(rc) &&
 651             smb2_should_replay(tcon, &retries, &cur_sleep))
 652                 goto replay_again;
 653
 654         if (cfile)
 655                 cifsFileInfo_put(cfile);
 656
 657         return rc;
 658 }
 659
 660 static int parse_create_response(struct cifs_open_info_data *data,
 661                                  struct cifs_sb_info *cifs_sb,
 662                                  const struct kvec *iov)
 663 {
 664         struct smb2_create_rsp *rsp = iov->iov_base;
 665         bool reparse_point = false;
 666         u32 tag = 0;
 667         int rc = 0;
 668
 669         switch (rsp->hdr.Status) {
 670         case STATUS_IO_REPARSE_TAG_NOT_HANDLED:
 671                 reparse_point = true;
 672                 break;
 673         case STATUS_STOPPED_ON_SYMLINK:
 674                 rc = smb2_parse_symlink_response(cifs_sb, iov,
 675                                                  &data->symlink_target);
 676                 if (rc)
 677                         return rc;
 678                 tag = IO_REPARSE_TAG_SYMLINK;
 679                 reparse_point = true;
 680                 break;
 681         case STATUS_SUCCESS:
 682                 reparse_point = !!(rsp->Flags & SMB2_CREATE_FLAG_REPARSEPOINT);
 683                 break;
 684         }
 685         data->reparse_point = reparse_point;
 686         data->reparse.tag = tag;
 687         return rc;
 688 }
 689
 690 int smb2_query_path_info(const unsigned int xid,
 691                          struct cifs_tcon *tcon,
 692                          struct cifs_sb_info *cifs_sb,
 693                          const char *full_path,
 694                          struct cifs_open_info_data *data)
 695 {
 696         __u32 create_options = 0;
 697         struct cifsFileInfo *cfile;
 698         struct cached_fid *cfid = NULL;
 699         struct smb2_hdr *hdr;
 700         struct kvec in_iov[2], out_iov[3] = {};
 701         int out_buftype[3] = {};
 702         int cmds[2];
 703         bool islink;
 704         int i, num_cmds;
 705         int rc, rc2;
 706
 707         data->adjust_tz = false;
 708         data->reparse_point = false;
 709
 710         /*
 711          * BB TODO: Add support for using cached root handle in SMB3.1.1 POSIX.
 712          * Create SMB2_query_posix_info worker function to do non-compounded
 713          * query when we already have an open file handle for this. For now this
 714          * is fast enough (always using the compounded version).
 715          */
 716         if (!tcon->posix_extensions) {
 717                 if (*full_path) {
 718                         rc = -ENOENT;
 719                 } else {
 720                         rc = open_cached_dir(xid, tcon, full_path,
 721                                              cifs_sb, false, &cfid);
 722                 }
 723                 /* If it is a root and its handle is cached then use it */
 724                 if (!rc) {
 725                         if (cfid->file_all_info_is_valid) {
 726                                 memcpy(&data->fi, &cfid->file_all_info,
 727                                        sizeof(data->fi));
 728                         } else {
 729                                 rc = SMB2_query_info(xid, tcon,
 730                                                      cfid->fid.persistent_fid,
 731                                                      cfid->fid.volatile_fid,
 732                                                      &data->fi);
 733                         }
 734                         close_cached_dir(cfid);
 735                         return rc;
 736                 }
 737                 cmds[0] = SMB2_OP_QUERY_INFO;
 738         } else {
 739                 cmds[0] = SMB2_OP_POSIX_QUERY_INFO;
 740         }
 741
 742         in_iov[0].iov_base = data;
 743         in_iov[0].iov_len = sizeof(*data);
 744         in_iov[1] = in_iov[0];
 745
 746         cifs_get_readable_path(tcon, full_path, &cfile);
 747         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 748                               FILE_READ_ATTRIBUTES, FILE_OPEN,
 749                               create_options, ACL_NO_MODE, in_iov,
 750                               cmds, 1, cfile, out_iov, out_buftype);
 751         hdr = out_iov[0].iov_base;
 752         /*
 753          * If first iov is unset, then SMB session was dropped or we've got a
 754          * cached open file (@cfile).
 755          */
 756         if (!hdr || out_buftype[0] == CIFS_NO_BUFFER)
 757                 goto out;
 758
 759         switch (rc) {
 760         case 0:
 761         case -EOPNOTSUPP:
 762                 /*
 763                  * BB TODO: When support for special files added to Samba
 764                  * re-verify this path.
 765                  */
 766                 rc = parse_create_response(data, cifs_sb, &out_iov[0]);
 767                 if (rc || !data->reparse_point)
 768                         goto out;
 769
 770                 if (data->reparse.tag == IO_REPARSE_TAG_SYMLINK) {
 771                         /* symlink already parsed in create response */
 772                         num_cmds = 1;
 773                 } else {
 774                         cmds[1] = SMB2_OP_GET_REPARSE;
 775                         num_cmds = 2;
 776                 }
 777                 create_options |= OPEN_REPARSE_POINT;
 778                 cifs_get_readable_path(tcon, full_path, &cfile);
 779                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 780                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 781                                       create_options, ACL_NO_MODE, in_iov,
 782                                       cmds, num_cmds, cfile, NULL, NULL);
 783                 break;
 784         case -EREMOTE:
 785                 break;
 786         default:
 787                 if (hdr->Status != STATUS_OBJECT_NAME_INVALID)
 788                         break;
 789                 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
 790                                                      full_path, &islink);
 791                 if (rc2) {
 792                         rc = rc2;
 793                         goto out;
 794                 }
 795                 if (islink)
 796                         rc = -EREMOTE;
 797         }
 798
 799 out:
 800         for (i = 0; i < ARRAY_SIZE(out_buftype); i++)
 801                 free_rsp_buf(out_buftype[i], out_iov[i].iov_base);
 802         return rc;
 803 }
 804
 805 int
 806 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
 807            struct cifs_tcon *tcon, const char *name,
 808            struct cifs_sb_info *cifs_sb)
 809 {
 810         return smb2_compound_op(xid, tcon, cifs_sb, name,
 811                                 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 812                                 CREATE_NOT_FILE, mode,
 813                                 NULL, &(int){SMB2_OP_MKDIR}, 1,
 814                                 NULL, NULL, NULL);
 815 }
 816
 817 void
 818 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 819                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 820                    const unsigned int xid)
 821 {
 822         FILE_BASIC_INFO data = {};
 823         struct cifsInodeInfo *cifs_i;
 824         struct cifsFileInfo *cfile;
 825         struct kvec in_iov;
 826         u32 dosattrs;
 827         int tmprc;
 828
 829         in_iov.iov_base = &data;
 830         in_iov.iov_len = sizeof(data);
 831         cifs_i = CIFS_I(inode);
 832         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 833         data.Attributes = cpu_to_le32(dosattrs);
 834         cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
 835         tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
 836                                  FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 837                                  CREATE_NOT_FILE, ACL_NO_MODE, &in_iov,
 838                                  &(int){SMB2_OP_SET_INFO}, 1,
 839                                  cfile, NULL, NULL);
 840         if (tmprc == 0)
 841                 cifs_i->cifsAttrs = dosattrs;
 842 }
 843
 844 int
 845 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 846            struct cifs_sb_info *cifs_sb)
 847 {
 848         drop_cached_dir_by_name(xid, tcon, name, cifs_sb);
 849         return smb2_compound_op(xid, tcon, cifs_sb, name,
 850                                 DELETE, FILE_OPEN, CREATE_NOT_FILE,
 851                                 ACL_NO_MODE, NULL,
 852                                 &(int){SMB2_OP_RMDIR}, 1,
 853                                 NULL, NULL, NULL);
 854 }
 855
 856 int
 857 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 858             struct cifs_sb_info *cifs_sb)
 859 {
 860         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 861                                 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
 862                                 ACL_NO_MODE, NULL,
 863                                 &(int){SMB2_OP_DELETE}, 1,
 864                                 NULL, NULL, NULL);
 865 }
 866
 867 static int smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 868                               const char *from_name, const char *to_name,
 869                               struct cifs_sb_info *cifs_sb,
 870                               __u32 create_options, __u32 access,
 871                               int command, struct cifsFileInfo *cfile)
 872 {
 873         struct kvec in_iov;
 874         __le16 *smb2_to_name = NULL;
 875         int rc;
 876
 877         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 878         if (smb2_to_name == NULL) {
 879                 rc = -ENOMEM;
 880                 goto smb2_rename_path;
 881         }
 882         in_iov.iov_base = smb2_to_name;
 883         in_iov.iov_len = 2 * UniStrnlen((wchar_t *)smb2_to_name, PATH_MAX);
 884         rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
 885                               FILE_OPEN, create_options, ACL_NO_MODE,
 886                               &in_iov, &command, 1, cfile, NULL, NULL);
 887 smb2_rename_path:
 888         kfree(smb2_to_name);
 889         return rc;
 890 }
 891
 892 int smb2_rename_path(const unsigned int xid,
 893                      struct cifs_tcon *tcon,
 894                      struct dentry *source_dentry,
 895                      const char *from_name, const char *to_name,
 896                      struct cifs_sb_info *cifs_sb)
 897 {
 898         struct cifsFileInfo *cfile;
 899         __u32 co = file_create_options(source_dentry);
 900
 901         drop_cached_dir_by_name(xid, tcon, from_name, cifs_sb);
 902         cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
 903
 904         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 905                                   co, DELETE, SMB2_OP_RENAME, cfile);
 906 }
 907
 908 int smb2_create_hardlink(const unsigned int xid,
 909                          struct cifs_tcon *tcon,
 910                          struct dentry *source_dentry,
 911                          const char *from_name, const char *to_name,
 912                          struct cifs_sb_info *cifs_sb)
 913 {
 914         __u32 co = file_create_options(source_dentry);
 915
 916         return smb2_set_path_attr(xid, tcon, from_name, to_name,
 917                                   cifs_sb, co, FILE_READ_ATTRIBUTES,
 918                                   SMB2_OP_HARDLINK, NULL);
 919 }
 920
 921 int
 922 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 923                    const char *full_path, __u64 size,
 924                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 925 {
 926         struct cifsFileInfo *cfile;
 927         struct kvec in_iov;
 928         __le64 eof = cpu_to_le64(size);
 929
 930         in_iov.iov_base = &eof;
 931         in_iov.iov_len = sizeof(eof);
 932         cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 933         return smb2_compound_op(xid, tcon, cifs_sb, full_path,
 934                                 FILE_WRITE_DATA, FILE_OPEN,
 935                                 0, ACL_NO_MODE, &in_iov,
 936                                 &(int){SMB2_OP_SET_EOF}, 1,
 937                                 cfile, NULL, NULL);
 938 }
 939
 940 int
 941 smb2_set_file_info(struct inode *inode, const char *full_path,
 942                    FILE_BASIC_INFO *buf, const unsigned int xid)
 943 {
 944         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 945         struct tcon_link *tlink;
 946         struct cifs_tcon *tcon;
 947         struct cifsFileInfo *cfile;
 948         struct kvec in_iov = { .iov_base = buf, .iov_len = sizeof(*buf), };
 949         int rc;
 950
 951         if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
 952             (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
 953             (buf->Attributes == 0))
 954                 return 0; /* would be a no op, no sense sending this */
 955
 956         tlink = cifs_sb_tlink(cifs_sb);
 957         if (IS_ERR(tlink))
 958                 return PTR_ERR(tlink);
 959         tcon = tlink_tcon(tlink);
 960
 961         cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 962         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 963                               FILE_WRITE_ATTRIBUTES, FILE_OPEN,
 964                               0, ACL_NO_MODE, &in_iov,
 965                               &(int){SMB2_OP_SET_INFO}, 1,
 966                               cfile, NULL, NULL);
 967         cifs_put_tlink(tlink);
 968         return rc;
 969 }
 970
 971 struct inode *smb2_get_reparse_inode(struct cifs_open_info_data *data,
 972                                      struct super_block *sb,
 973                                      const unsigned int xid,
 974                                      struct cifs_tcon *tcon,
 975                                      const char *full_path,
 976                                      struct kvec *iov)
 977 {
 978         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 979         struct cifsFileInfo *cfile;
 980         struct inode *new = NULL;
 981         struct kvec in_iov[2];
 982         int cmds[2];
 983         int da, co, cd;
 984         int rc;
 985
 986         da = SYNCHRONIZE | DELETE |
 987                 FILE_READ_ATTRIBUTES |
 988                 FILE_WRITE_ATTRIBUTES;
 989         co = CREATE_NOT_DIR | OPEN_REPARSE_POINT;
 990         cd = FILE_CREATE;
 991         cmds[0] = SMB2_OP_SET_REPARSE;
 992         in_iov[0] = *iov;
 993         in_iov[1].iov_base = data;
 994         in_iov[1].iov_len = sizeof(*data);
 995
 996         if (tcon->posix_extensions) {
 997                 cmds[1] = SMB2_OP_POSIX_QUERY_INFO;
 998                 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 999                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
1000                                       da, cd, co, ACL_NO_MODE, in_iov,
1001                                       cmds, 2, cfile, NULL, NULL);
1002                 if (!rc) {
1003                         rc = smb311_posix_get_inode_info(&new, full_path,
1004                                                          data, sb, xid);
1005                 }
1006         } else {
1007                 cmds[1] = SMB2_OP_QUERY_INFO;
1008                 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
1009                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
1010                                       da, cd, co, ACL_NO_MODE, in_iov,
1011                                       cmds, 2, cfile, NULL, NULL);
1012                 if (!rc) {
1013                         rc = cifs_get_inode_info(&new, full_path,
1014                                                  data, sb, xid, NULL);
1015                 }
1016         }
1017         return rc ? ERR_PTR(rc) : new;
1018 }
1019
1020 int smb2_query_reparse_point(const unsigned int xid,
1021                              struct cifs_tcon *tcon,
1022                              struct cifs_sb_info *cifs_sb,
1023                              const char *full_path,
1024                              u32 *tag, struct kvec *rsp,
1025                              int *rsp_buftype)
1026 {
1027         struct cifs_open_info_data data = {};
1028         struct cifsFileInfo *cfile;
1029         struct kvec in_iov = { .iov_base = &data, .iov_len = sizeof(data), };
1030         int rc;
1031
1032         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1033
1034         cifs_get_readable_path(tcon, full_path, &cfile);
1035         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
1036                               FILE_READ_ATTRIBUTES, FILE_OPEN,
1037                               OPEN_REPARSE_POINT, ACL_NO_MODE, &in_iov,
1038                               &(int){SMB2_OP_GET_REPARSE}, 1,
1039                               cfile, NULL, NULL);
1040         if (rc)
1041                 goto out;
1042
1043         *tag = data.reparse.tag;
1044         *rsp = data.reparse.io.iov;
1045         *rsp_buftype = data.reparse.io.buftype;
1046         memset(&data.reparse.io.iov, 0, sizeof(data.reparse.io.iov));
1047         data.reparse.io.buftype = CIFS_NO_BUFFER;
1048 out:
1049         cifs_free_open_info(&data);
1050         return rc;
1051 }