source/modules/vfs_streams_xattr.c

   1 /*
   2  * Store streams in xattrs
   3  *
   4  * Copyright (C) Volker Lendecke, 2008
   5  *
   6  * Partly based on James Peach's Darwin module, which is
   7  *
   8  * Copyright (C) James Peach 2006-2007
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 3 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #include "includes.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_VFS
  28
  29 struct stream_io {
  30         char *base;
  31         char *xattr_name;
  32 };
  33
  34 static SMB_INO_T stream_inode(const SMB_STRUCT_STAT *sbuf, const char *sname)
  35 {
  36         struct MD5Context ctx;
  37         unsigned char hash[16];
  38         SMB_INO_T result;
  39         char *upper_sname;
  40
  41         DEBUG(10, ("stream_inode called for %lu/%lu [%s]\n",
  42                    (unsigned long)sbuf->st_dev,
  43                    (unsigned long)sbuf->st_ino, sname));
  44
  45         upper_sname = talloc_strdup_upper(talloc_tos(), sname);
  46         SMB_ASSERT(upper_sname != NULL);
  47
  48         MD5Init(&ctx);
  49         MD5Update(&ctx, (unsigned char *)&(sbuf->st_dev),
  50                   sizeof(sbuf->st_dev));
  51         MD5Update(&ctx, (unsigned char *)&(sbuf->st_ino),
  52                   sizeof(sbuf->st_ino));
  53         MD5Update(&ctx, (unsigned char *)upper_sname,
  54                   talloc_get_size(upper_sname)-1);
  55         MD5Final(hash, &ctx);
  56
  57         TALLOC_FREE(upper_sname);
  58
  59         /* Hopefully all the variation is in the lower 4 (or 8) bytes! */
  60         memcpy(&result, hash, sizeof(result));
  61
  62         DEBUG(10, ("stream_inode returns %lu\n", (unsigned long)result));
  63
  64         return result;
  65 }
  66
  67 static ssize_t get_xattr_size(connection_struct *conn, const char *fname,
  68                               const char *xattr_name)
  69 {
  70         NTSTATUS status;
  71         struct ea_struct ea;
  72         ssize_t result;
  73
  74         status = get_ea_value(talloc_tos(), conn, NULL, fname,
  75                               xattr_name, &ea);
  76
  77         if (!NT_STATUS_IS_OK(status)) {
  78                 return -1;
  79         }
  80
  81         result = ea.value.length-1;
  82         TALLOC_FREE(ea.value.data);
  83         return result;
  84 }
  85
  86
  87 static int streams_xattr_fstat(vfs_handle_struct *handle, files_struct *fsp,
  88                                SMB_STRUCT_STAT *sbuf)
  89 {
  90         struct stream_io *io = (struct stream_io *)
  91                 VFS_FETCH_FSP_EXTENSION(handle, fsp);
  92
  93         DEBUG(10, ("streams_xattr_fstat called for %d\n", fsp->fh->fd));
  94
  95         if (io == NULL) {
  96                 return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
  97         }
  98
  99         if (SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf) == -1) {
 100                 return -1;
 101         }
 102
 103         sbuf->st_size = get_xattr_size(handle->conn, io->base, io->xattr_name);
 104         if (sbuf->st_size == -1) {
 105                 return -1;
 106         }
 107
 108         DEBUG(10, ("sbuf->st_size = %d\n", (int)sbuf->st_size));
 109
 110         sbuf->st_ino = stream_inode(sbuf, io->xattr_name);
 111         sbuf->st_mode &= ~S_IFMT;
 112         sbuf->st_mode |= S_IFREG;
 113         sbuf->st_blocks = sbuf->st_size % STAT_ST_BLOCKSIZE + 1;
 114
 115         return 0;
 116 }
 117
 118 static int streams_xattr_stat(vfs_handle_struct *handle, const char *fname,
 119                               SMB_STRUCT_STAT *sbuf)
 120 {
 121         NTSTATUS status;
 122         char *base = NULL, *sname = NULL;
 123         int result = -1;
 124         char *xattr_name;
 125
 126         if (!is_ntfs_stream_name(fname)) {
 127                 return SMB_VFS_NEXT_STAT(handle, fname, sbuf);
 128         }
 129
 130         status = split_ntfs_stream_name(talloc_tos(), fname, &base, &sname);
 131         if (!NT_STATUS_IS_OK(status)) {
 132                 errno = EINVAL;
 133                 return -1;
 134         }
 135
 136         if (SMB_VFS_STAT(handle->conn, base, sbuf) == -1) {
 137                 goto fail;
 138         }
 139
 140         xattr_name = talloc_asprintf(talloc_tos(), "%s%s",
 141                                      SAMBA_XATTR_DOSSTREAM_PREFIX, sname);
 142         if (xattr_name == NULL) {
 143                 errno = ENOMEM;
 144                 goto fail;
 145         }
 146
 147         sbuf->st_size = get_xattr_size(handle->conn, base, xattr_name);
 148         if (sbuf->st_size == -1) {
 149                 errno = ENOENT;
 150                 goto fail;
 151         }
 152
 153         sbuf->st_ino = stream_inode(sbuf, xattr_name);
 154         sbuf->st_mode &= ~S_IFMT;
 155         sbuf->st_mode |= S_IFREG;
 156         sbuf->st_blocks = sbuf->st_size % STAT_ST_BLOCKSIZE + 1;
 157
 158         result = 0;
 159  fail:
 160         TALLOC_FREE(base);
 161         TALLOC_FREE(sname);
 162         return result;
 163 }
 164
 165 static int streams_xattr_lstat(vfs_handle_struct *handle, const char *fname,
 166                                SMB_STRUCT_STAT *sbuf)
 167 {
 168         NTSTATUS status;
 169         char *base, *sname;
 170         int result = -1;
 171         char *xattr_name;
 172
 173         if (!is_ntfs_stream_name(fname)) {
 174                 return SMB_VFS_NEXT_LSTAT(handle, fname, sbuf);
 175         }
 176
 177         status = split_ntfs_stream_name(talloc_tos(), fname, &base, &sname);
 178         if (!NT_STATUS_IS_OK(status)) {
 179                 errno = EINVAL;
 180                 goto fail;
 181         }
 182
 183         if (SMB_VFS_LSTAT(handle->conn, base, sbuf) == -1) {
 184                 goto fail;
 185         }
 186
 187         xattr_name = talloc_asprintf(talloc_tos(), "%s%s",
 188                                      SAMBA_XATTR_DOSSTREAM_PREFIX, sname);
 189         if (xattr_name == NULL) {
 190                 errno = ENOMEM;
 191                 goto fail;
 192         }
 193
 194         sbuf->st_size = get_xattr_size(handle->conn, base, xattr_name);
 195         if (sbuf->st_size == -1) {
 196                 errno = ENOENT;
 197                 goto fail;
 198         }
 199
 200         sbuf->st_ino = stream_inode(sbuf, xattr_name);
 201         sbuf->st_mode &= ~S_IFMT;
 202         sbuf->st_mode |= S_IFREG;
 203         sbuf->st_blocks = sbuf->st_size % STAT_ST_BLOCKSIZE + 1;
 204
 205         result = 0;
 206  fail:
 207         TALLOC_FREE(base);
 208         TALLOC_FREE(sname);
 209         return result;
 210 }
 211
 212 static int streams_xattr_open(vfs_handle_struct *handle,  const char *fname,
 213                               files_struct *fsp, int flags, mode_t mode)
 214 {
 215         TALLOC_CTX *frame;
 216         NTSTATUS status;
 217         struct stream_io *sio;
 218         char *base, *sname;
 219         struct ea_struct ea;
 220         char *xattr_name;
 221         int baseflags;
 222         int hostfd = -1;
 223
 224         DEBUG(10, ("streams_xattr_open called for %s\n", fname));
 225
 226         if (!is_ntfs_stream_name(fname)) {
 227                 return SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);
 228         }
 229
 230         frame = talloc_stackframe();
 231
 232         status = split_ntfs_stream_name(talloc_tos(), fname,
 233                                         &base, &sname);
 234         if (!NT_STATUS_IS_OK(status)) {
 235                 errno = EINVAL;
 236                 goto fail;
 237         }
 238
 239         xattr_name = talloc_asprintf(talloc_tos(), "%s%s",
 240                                      SAMBA_XATTR_DOSSTREAM_PREFIX, sname);
 241         if (xattr_name == NULL) {
 242                 errno = ENOMEM;
 243                 goto fail;
 244         }
 245
 246         /*
 247          * We use baseflags to turn off nasty side-effects when opening the
 248          * underlying file.
 249          */
 250         baseflags = flags;
 251         baseflags &= ~O_TRUNC;
 252         baseflags &= ~O_EXCL;
 253         baseflags &= ~O_CREAT;
 254
 255         hostfd = SMB_VFS_OPEN(handle->conn, base, fsp, baseflags, mode);
 256
 257         /* It is legit to open a stream on a directory, but the base
 258          * fd has to be read-only.
 259          */
 260         if ((hostfd == -1) && (errno == EISDIR)) {
 261                 baseflags &= ~O_ACCMODE;
 262                 baseflags |= O_RDONLY;
 263                 hostfd = SMB_VFS_OPEN(handle->conn, fname, fsp, baseflags,
 264                                       mode);
 265         }
 266
 267         if (hostfd == -1) {
 268                 goto fail;
 269         }
 270
 271         status = get_ea_value(talloc_tos(), handle->conn, NULL, base,
 272                               xattr_name, &ea);
 273
 274         DEBUG(10, ("get_ea_value returned %s\n", nt_errstr(status)));
 275
 276         if (!NT_STATUS_IS_OK(status)
 277             && !NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 278                 /*
 279                  * The base file is not there. This is an error even if we got
 280                  * O_CREAT, the higher levels should have created the base
 281                  * file for us.
 282                  */
 283                 DEBUG(10, ("streams_xattr_open: base file %s not around, "
 284                            "returning ENOENT\n", base));
 285                 errno = ENOENT;
 286                 goto fail;
 287         }
 288
 289         if (!NT_STATUS_IS_OK(status)) {
 290                 /*
 291                  * The attribute does not exist
 292                  */
 293
 294                 if (flags & O_CREAT) {
 295                         /*
 296                          * Darn, xattrs need at least 1 byte
 297                          */
 298                         char null = '\0';
 299
 300                         DEBUG(10, ("creating attribute %s on file %s\n",
 301                                    xattr_name, base));
 302
 303                         if (SMB_VFS_SETXATTR(
 304                                 handle->conn, base, xattr_name,
 305                                 &null, sizeof(null),
 306                                 flags & O_EXCL ? XATTR_CREATE : 0) == -1) {
 307                                 goto fail;
 308                         }
 309                 }
 310         }
 311
 312         if (flags & O_TRUNC) {
 313                 char null = '\0';
 314                 if (SMB_VFS_SETXATTR(
 315                             handle->conn, base, xattr_name,
 316                             &null, sizeof(null),
 317                             flags & O_EXCL ? XATTR_CREATE : 0) == -1) {
 318                         goto fail;
 319                 }
 320         }
 321
 322         sio = (struct stream_io *)VFS_ADD_FSP_EXTENSION(handle, fsp,
 323                                                         struct stream_io);
 324         if (sio == NULL) {
 325                 errno = ENOMEM;
 326                 goto fail;
 327         }
 328
 329         sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
 330                                         xattr_name);
 331         sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
 332                                   base);
 333
 334         if ((sio->xattr_name == NULL) || (sio->base == NULL)) {
 335                 errno = ENOMEM;
 336                 goto fail;
 337         }
 338
 339         TALLOC_FREE(frame);
 340         return hostfd;
 341
 342  fail:
 343         if (hostfd >= 0) {
 344                 /*
 345                  * BUGBUGBUG -- we would need to call fd_close_posix here, but
 346                  * we don't have a full fsp yet
 347                  */
 348                 SMB_VFS_CLOSE(fsp);
 349         }
 350
 351         TALLOC_FREE(frame);
 352         return -1;
 353 }
 354
 355 static int streams_xattr_unlink(vfs_handle_struct *handle,  const char *fname)
 356 {
 357         NTSTATUS status;
 358         char *base = NULL;
 359         char *sname = NULL;
 360         int ret = -1;
 361         char *xattr_name;
 362
 363         if (!is_ntfs_stream_name(fname)) {
 364                 return SMB_VFS_NEXT_UNLINK(handle, fname);
 365         }
 366
 367         status = split_ntfs_stream_name(talloc_tos(), fname, &base, &sname);
 368         if (!NT_STATUS_IS_OK(status)) {
 369                 errno = EINVAL;
 370                 goto fail;
 371         }
 372
 373         xattr_name = talloc_asprintf(talloc_tos(), "%s%s",
 374                                      SAMBA_XATTR_DOSSTREAM_PREFIX, sname);
 375         if (xattr_name == NULL) {
 376                 errno = ENOMEM;
 377                 goto fail;
 378         }
 379
 380         ret = SMB_VFS_REMOVEXATTR(handle->conn, base, xattr_name);
 381
 382         if ((ret == -1) && (errno == ENOATTR)) {
 383                 errno = ENOENT;
 384                 goto fail;
 385         }
 386
 387         ret = 0;
 388
 389  fail:
 390         TALLOC_FREE(base);
 391         TALLOC_FREE(sname);
 392         return ret;
 393 }
 394
 395 static NTSTATUS walk_xattr_streams(connection_struct *conn, files_struct *fsp,
 396                                    const char *fname,
 397                                    bool (*fn)(struct ea_struct *ea,
 398                                               void *private_data),
 399                                    void *private_data)
 400 {
 401         NTSTATUS status;
 402         char **names;
 403         size_t i, num_names;
 404         size_t prefix_len = strlen(SAMBA_XATTR_DOSSTREAM_PREFIX);
 405
 406         status = get_ea_names_from_file(talloc_tos(), conn, fsp, fname,
 407                                         &names, &num_names);
 408         if (!NT_STATUS_IS_OK(status)) {
 409                 return status;
 410         }
 411
 412         for (i=0; i<num_names; i++) {
 413                 struct ea_struct ea;
 414
 415                 if (strncmp(names[i], SAMBA_XATTR_DOSSTREAM_PREFIX,
 416                             prefix_len) != 0) {
 417                         continue;
 418                 }
 419
 420                 status = get_ea_value(names, conn, fsp, fname, names[i], &ea);
 421                 if (!NT_STATUS_IS_OK(status)) {
 422                         DEBUG(10, ("Could not get ea %s for file %s: %s\n",
 423                                    names[i], fname, nt_errstr(status)));
 424                         continue;
 425                 }
 426
 427                 ea.name = talloc_asprintf(ea.value.data, ":%s",
 428                                           names[i] + prefix_len);
 429                 if (ea.name == NULL) {
 430                         DEBUG(0, ("talloc failed\n"));
 431                         continue;
 432                 }
 433
 434                 if (!fn(&ea, private_data)) {
 435                         TALLOC_FREE(ea.value.data);
 436                         return NT_STATUS_OK;
 437                 }
 438
 439                 TALLOC_FREE(ea.value.data);
 440         }
 441
 442         TALLOC_FREE(names);
 443         return NT_STATUS_OK;
 444 }
 445
 446 static bool add_one_stream(TALLOC_CTX *mem_ctx, unsigned int *num_streams,
 447                            struct stream_struct **streams,
 448                            const char *name, SMB_OFF_T size,
 449                            SMB_OFF_T alloc_size)
 450 {
 451         struct stream_struct *tmp;
 452
 453         tmp = TALLOC_REALLOC_ARRAY(mem_ctx, *streams, struct stream_struct,
 454                                    (*num_streams)+1);
 455         if (tmp == NULL) {
 456                 return false;
 457         }
 458
 459         tmp[*num_streams].name = talloc_strdup(tmp, name);
 460         if (tmp[*num_streams].name == NULL) {
 461                 return false;
 462         }
 463
 464         tmp[*num_streams].size = size;
 465         tmp[*num_streams].alloc_size = alloc_size;
 466
 467         *streams = tmp;
 468         *num_streams += 1;
 469         return true;
 470 }
 471
 472 struct streaminfo_state {
 473         TALLOC_CTX *mem_ctx;
 474         vfs_handle_struct *handle;
 475         unsigned int num_streams;
 476         struct stream_struct *streams;
 477         NTSTATUS status;
 478 };
 479
 480 static bool collect_one_stream(struct ea_struct *ea, void *private_data)
 481 {
 482         struct streaminfo_state *state =
 483                 (struct streaminfo_state *)private_data;
 484
 485         if (!add_one_stream(state->mem_ctx,
 486                             &state->num_streams, &state->streams,
 487                             ea->name, ea->value.length-1,
 488                             smb_roundup(state->handle->conn,
 489                                         ea->value.length-1))) {
 490                 state->status = NT_STATUS_NO_MEMORY;
 491                 return false;
 492         }
 493
 494         return true;
 495 }
 496
 497 static NTSTATUS streams_xattr_streaminfo(vfs_handle_struct *handle,
 498                                          struct files_struct *fsp,
 499                                          const char *fname,
 500                                          TALLOC_CTX *mem_ctx,
 501                                          unsigned int *pnum_streams,
 502                                          struct stream_struct **pstreams)
 503 {
 504         SMB_STRUCT_STAT sbuf;
 505         int ret;
 506         NTSTATUS status;
 507         struct streaminfo_state state;
 508
 509         if ((fsp != NULL) && (fsp->fh->fd != -1)) {
 510                 if (is_ntfs_stream_name(fsp->fsp_name)) {
 511                         return NT_STATUS_INVALID_PARAMETER;
 512                 }
 513                 ret = SMB_VFS_FSTAT(fsp, &sbuf);
 514         }
 515         else {
 516                 if (is_ntfs_stream_name(fname)) {
 517                         return NT_STATUS_INVALID_PARAMETER;
 518                 }
 519                 ret = SMB_VFS_STAT(handle->conn, fname, &sbuf);
 520         }
 521
 522         if (ret == -1) {
 523                 return map_nt_error_from_unix(errno);
 524         }
 525
 526         state.streams = NULL;
 527         state.num_streams = 0;
 528
 529         if (!S_ISDIR(sbuf.st_mode)) {
 530                 if (!add_one_stream(mem_ctx,
 531                                     &state.num_streams, &state.streams,
 532                                     "::$DATA", sbuf.st_size,
 533                                     get_allocation_size(handle->conn, fsp,
 534                                                         &sbuf))) {
 535                         return NT_STATUS_NO_MEMORY;
 536                 }
 537         }
 538
 539         state.mem_ctx = mem_ctx;
 540         state.handle = handle;
 541         state.status = NT_STATUS_OK;
 542
 543         status = walk_xattr_streams(handle->conn, fsp, fname,
 544                                     collect_one_stream, &state);
 545
 546         if (!NT_STATUS_IS_OK(status)) {
 547                 TALLOC_FREE(state.streams);
 548                 return status;
 549         }
 550
 551         if (!NT_STATUS_IS_OK(state.status)) {
 552                 TALLOC_FREE(state.streams);
 553                 return state.status;
 554         }
 555
 556         *pnum_streams = state.num_streams;
 557         *pstreams = state.streams;
 558         return NT_STATUS_OK;
 559 }
 560
 561 static uint32_t streams_xattr_fs_capabilities(struct vfs_handle_struct *handle)
 562 {
 563         return SMB_VFS_NEXT_FS_CAPABILITIES(handle) | FILE_NAMED_STREAMS;
 564 }
 565
 566 static ssize_t streams_xattr_pwrite(vfs_handle_struct *handle,
 567                                     files_struct *fsp, const void *data,
 568                                     size_t n, SMB_OFF_T offset)
 569 {
 570         struct stream_io *sio =
 571                 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
 572         struct ea_struct ea;
 573         NTSTATUS status;
 574         int ret;
 575
 576         DEBUG(10, ("streams_xattr_pwrite called for %d bytes\n", (int)n));
 577
 578         if (sio == NULL) {
 579                 return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
 580         }
 581
 582         status = get_ea_value(talloc_tos(), handle->conn, fsp->base_fsp,
 583                               sio->base, sio->xattr_name, &ea);
 584         if (!NT_STATUS_IS_OK(status)) {
 585                 return -1;
 586         }
 587
 588         if ((offset + n) > ea.value.length-1) {
 589                 uint8 *tmp;
 590
 591                 tmp = TALLOC_REALLOC_ARRAY(talloc_tos(), ea.value.data, uint8,
 592                                            offset + n + 1);
 593
 594                 if (tmp == NULL) {
 595                         TALLOC_FREE(ea.value.data);
 596                         errno = ENOMEM;
 597                         return -1;
 598                 }
 599                 ea.value.data = tmp;
 600                 ea.value.length = offset + n + 1;
 601                 ea.value.data[offset+n] = 0;
 602         }
 603
 604         memcpy(ea.value.data + offset, data, n);
 605
 606         ret = SMB_VFS_SETXATTR(fsp->conn, fsp->base_fsp->fsp_name,
 607                                 sio->xattr_name,
 608                                 ea.value.data, ea.value.length, 0);
 609
 610         TALLOC_FREE(ea.value.data);
 611
 612         if (ret == -1) {
 613                 return -1;
 614         }
 615
 616         return n;
 617 }
 618
 619 static ssize_t streams_xattr_pread(vfs_handle_struct *handle,
 620                                    files_struct *fsp, void *data,
 621                                    size_t n, SMB_OFF_T offset)
 622 {
 623         struct stream_io *sio =
 624                 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
 625         struct ea_struct ea;
 626         NTSTATUS status;
 627         size_t length, overlap;
 628
 629         if (sio == NULL) {
 630                 return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
 631         }
 632
 633         status = get_ea_value(talloc_tos(), handle->conn, fsp->base_fsp,
 634                               sio->base, sio->xattr_name, &ea);
 635         if (!NT_STATUS_IS_OK(status)) {
 636                 return -1;
 637         }
 638
 639         length = ea.value.length-1;
 640
 641         /* Attempt to read past EOF. */
 642         if (length <= offset) {
 643                 errno = EINVAL;
 644                 return -1;
 645         }
 646
 647         overlap = (offset + n) > length ? (length - offset) : n;
 648         memcpy(data, ea.value.data + offset, overlap);
 649
 650         TALLOC_FREE(ea.value.data);
 651         return overlap;
 652 }
 653
 654 /* VFS operations structure */
 655
 656 static vfs_op_tuple streams_xattr_ops[] = {
 657         {SMB_VFS_OP(streams_xattr_fs_capabilities), SMB_VFS_OP_FS_CAPABILITIES,
 658          SMB_VFS_LAYER_TRANSPARENT},
 659         {SMB_VFS_OP(streams_xattr_open), SMB_VFS_OP_OPEN,
 660          SMB_VFS_LAYER_TRANSPARENT},
 661         {SMB_VFS_OP(streams_xattr_stat), SMB_VFS_OP_STAT,
 662          SMB_VFS_LAYER_TRANSPARENT},
 663         {SMB_VFS_OP(streams_xattr_fstat), SMB_VFS_OP_FSTAT,
 664          SMB_VFS_LAYER_TRANSPARENT},
 665         {SMB_VFS_OP(streams_xattr_lstat), SMB_VFS_OP_LSTAT,
 666          SMB_VFS_LAYER_TRANSPARENT},
 667         {SMB_VFS_OP(streams_xattr_pread), SMB_VFS_OP_PREAD,
 668          SMB_VFS_LAYER_TRANSPARENT},
 669         {SMB_VFS_OP(streams_xattr_pwrite), SMB_VFS_OP_PWRITE,
 670          SMB_VFS_LAYER_TRANSPARENT},
 671         {SMB_VFS_OP(streams_xattr_lstat), SMB_VFS_OP_LSTAT,
 672          SMB_VFS_LAYER_TRANSPARENT},
 673         {SMB_VFS_OP(streams_xattr_unlink), SMB_VFS_OP_UNLINK,
 674          SMB_VFS_LAYER_TRANSPARENT},
 675         {SMB_VFS_OP(streams_xattr_streaminfo), SMB_VFS_OP_STREAMINFO,
 676          SMB_VFS_LAYER_OPAQUE},
 677         {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
 678 };
 679
 680 NTSTATUS vfs_streams_xattr_init(void);
 681 NTSTATUS vfs_streams_xattr_init(void)
 682 {
 683         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "streams_xattr",
 684                                 streams_xattr_ops);
 685 }