source3/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 #define XATTR_DOSSTREAM_PREFIX "user.DosStream."
  30
  31 struct stream_io {
  32         char *base;
  33         char *xattr_name;
  34 };
  35
  36 static SMB_INO_T stream_inode(const SMB_STRUCT_STAT *sbuf, const char *sname)
  37 {
  38         struct MD5Context ctx;
  39         unsigned char hash[16];
  40         SMB_INO_T result;
  41         char *upper_sname;
  42
  43         DEBUG(10, ("stream_inode called for %lu/%lu [%s]\n",
  44                    (unsigned long)sbuf->st_dev,
  45                    (unsigned long)sbuf->st_ino, sname));
  46
  47         upper_sname = talloc_strdup_upper(talloc_tos(), sname);
  48         SMB_ASSERT(upper_sname != NULL);
  49
  50         MD5Init(&ctx);
  51         MD5Update(&ctx, (unsigned char *)&(sbuf->st_dev),
  52                   sizeof(sbuf->st_dev));
  53         MD5Update(&ctx, (unsigned char *)&(sbuf->st_ino),
  54                   sizeof(sbuf->st_ino));
  55         MD5Update(&ctx, (unsigned char *)upper_sname,
  56                   talloc_get_size(upper_sname)-1);
  57         MD5Final(hash, &ctx);
  58
  59         TALLOC_FREE(upper_sname);
  60
  61         /* Hopefully all the variation is in the lower 4 (or 8) bytes! */
  62         memcpy(&result, hash, sizeof(result));
  63
  64         DEBUG(10, ("stream_inode returns %lu\n", (unsigned long)result));
  65
  66         return result;
  67 }
  68
  69 static ssize_t get_xattr_size(connection_struct *conn, const char *fname,
  70                               const char *xattr_name)
  71 {
  72         NTSTATUS status;
  73         struct ea_struct ea;
  74         ssize_t result;
  75
  76         status = get_ea_value(talloc_tos(), conn, NULL, fname,
  77                               xattr_name, &ea);
  78
  79         if (!NT_STATUS_IS_OK(status)) {
  80                 return -1;
  81         }
  82
  83         result = ea.value.length-1;
  84         TALLOC_FREE(ea.value.data);
  85         return result;
  86 }
  87
  88
  89 static int streams_xattr_fstat(vfs_handle_struct *handle, files_struct *fsp,
  90                                SMB_STRUCT_STAT *sbuf)
  91 {
  92         struct stream_io *io = (struct stream_io *)
  93                 VFS_FETCH_FSP_EXTENSION(handle, fsp);
  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         sbuf->st_ino = stream_inode(sbuf, io->xattr_name);
 109         sbuf->st_mode &= ~S_IFMT;
 110         sbuf->st_mode |= S_IFREG;
 111         sbuf->st_blocks = sbuf->st_size % STAT_ST_BLOCKSIZE + 1;
 112
 113         return 0;
 114 }
 115
 116 static int streams_xattr_stat(vfs_handle_struct *handle, const char *fname,
 117                               SMB_STRUCT_STAT *sbuf)
 118 {
 119         NTSTATUS status;
 120         char *base, *sname;
 121         int result = -1;
 122         char *xattr_name;
 123
 124         if (!is_ntfs_stream_name(fname)) {
 125                 return SMB_VFS_NEXT_STAT(handle, fname, sbuf);
 126         }
 127
 128         status = split_ntfs_stream_name(talloc_tos(), fname, &base, &sname);
 129         if (!NT_STATUS_IS_OK(status)) {
 130                 errno = EINVAL;
 131                 goto fail;
 132         }
 133
 134         if (SMB_VFS_STAT(handle->conn, base, sbuf) == -1) {
 135                 goto fail;
 136         }
 137
 138         xattr_name = talloc_asprintf(talloc_tos(), "%s%s",
 139                                      XATTR_DOSSTREAM_PREFIX, sname);
 140         if (xattr_name == NULL) {
 141                 errno = ENOMEM;
 142                 goto fail;
 143         }
 144
 145         sbuf->st_size = get_xattr_size(handle->conn, base, xattr_name);
 146         if (sbuf->st_size == -1) {
 147                 errno = ENOENT;
 148                 goto fail;
 149         }
 150
 151         sbuf->st_ino = stream_inode(sbuf, xattr_name);
 152         sbuf->st_mode &= ~S_IFMT;
 153         sbuf->st_mode |= S_IFREG;
 154         sbuf->st_blocks = sbuf->st_size % STAT_ST_BLOCKSIZE + 1;
 155
 156         result = 0;
 157  fail:
 158         TALLOC_FREE(base);
 159         TALLOC_FREE(sname);
 160         return result;
 161 }
 162
 163 static int streams_xattr_lstat(vfs_handle_struct *handle, const char *fname,
 164                                SMB_STRUCT_STAT *sbuf)
 165 {
 166         NTSTATUS status;
 167         char *base, *sname;
 168         int result = -1;
 169         char *xattr_name;
 170
 171         if (!is_ntfs_stream_name(fname)) {
 172                 return SMB_VFS_NEXT_LSTAT(handle, fname, sbuf);
 173         }
 174
 175         status = split_ntfs_stream_name(talloc_tos(), fname, &base, &sname);
 176         if (!NT_STATUS_IS_OK(status)) {
 177                 errno = EINVAL;
 178                 goto fail;
 179         }
 180
 181         if (SMB_VFS_LSTAT(handle->conn, base, sbuf) == -1) {
 182                 goto fail;
 183         }
 184
 185         xattr_name = talloc_asprintf(talloc_tos(), "%s%s",
 186                                      XATTR_DOSSTREAM_PREFIX, sname);
 187         if (xattr_name == NULL) {
 188                 errno = ENOMEM;
 189                 goto fail;
 190         }
 191
 192         sbuf->st_size = get_xattr_size(handle->conn, base, xattr_name);
 193         if (sbuf->st_size == -1) {
 194                 errno = ENOENT;
 195                 goto fail;
 196         }
 197
 198         sbuf->st_ino = stream_inode(sbuf, xattr_name);
 199         sbuf->st_mode &= ~S_IFMT;
 200         sbuf->st_mode |= S_IFREG;
 201         sbuf->st_blocks = sbuf->st_size % STAT_ST_BLOCKSIZE + 1;
 202
 203         result = 0;
 204  fail:
 205         TALLOC_FREE(base);
 206         TALLOC_FREE(sname);
 207         return result;
 208 }
 209
 210 static int streams_xattr_open(vfs_handle_struct *handle,  const char *fname,
 211                               files_struct *fsp, int flags, mode_t mode)
 212 {
 213         TALLOC_CTX *frame;
 214         NTSTATUS status;
 215         struct stream_io *sio;
 216         char *base, *sname;
 217         struct ea_struct ea;
 218         char *xattr_name;
 219         int baseflags;
 220         int hostfd = -1;
 221
 222         if (!is_ntfs_stream_name(fname)) {
 223                 return SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);
 224         }
 225
 226         frame = talloc_stackframe();
 227
 228         status = split_ntfs_stream_name(talloc_tos(), fname,
 229                                         &base, &sname);
 230         if (!NT_STATUS_IS_OK(status)) {
 231                 errno = EINVAL;
 232                 goto fail;
 233         }
 234
 235         xattr_name = talloc_asprintf(talloc_tos(), "%s%s",
 236                                      XATTR_DOSSTREAM_PREFIX, sname);
 237         if (xattr_name == NULL) {
 238                 errno = ENOMEM;
 239                 goto fail;
 240         }
 241
 242         /*
 243          * We use baseflags to turn off nasty side-effects when opening the
 244          * underlying file.
 245          */
 246         baseflags = flags;
 247         baseflags &= ~O_TRUNC;
 248         baseflags &= ~O_EXCL;
 249         baseflags &= ~O_CREAT;
 250
 251         hostfd = SMB_VFS_OPEN(handle->conn, base, fsp, baseflags, mode);
 252
 253         /* It is legit to open a stream on a directory, but the base
 254          * fd has to be read-only.
 255          */
 256         if ((hostfd == -1) && (errno == EISDIR)) {
 257                 baseflags &= ~O_ACCMODE;
 258                 baseflags |= O_RDONLY;
 259                 hostfd = SMB_VFS_OPEN(handle->conn, fname, fsp, baseflags,
 260                                       mode);
 261         }
 262
 263         if (hostfd == -1) {
 264                 goto fail;
 265         }
 266
 267         status = get_ea_value(talloc_tos(), handle->conn, fsp, base,
 268                               xattr_name, &ea);
 269
 270         if (!NT_STATUS_IS_OK(status)
 271             && !NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 272                 /*
 273                  * The base file is not there. This is an error even if we got
 274                  * O_CREAT, the higher levels should have created the base
 275                  * file for us.
 276                  */
 277                 errno = ENOENT;
 278                 goto fail;
 279         }
 280
 281         if (!NT_STATUS_IS_OK(status)) {
 282                 /*
 283                  * The attribute does not exist
 284                  */
 285
 286                 if (flags & O_CREAT) {
 287                         /*
 288                          * Darn, xattrs need at least 1 byte
 289                          */
 290                         char null = '\0';
 291
 292                         DEBUG(10, ("creating attribute %s on file %s\n",
 293                                    xattr_name, base));
 294
 295                         if (SMB_VFS_SETXATTR(
 296                                 handle->conn, base, xattr_name,
 297                                 &null, sizeof(null),
 298                                 flags & O_EXCL ? XATTR_CREATE : 0) == -1) {
 299                                 goto fail;
 300                         }
 301                 }
 302         }
 303
 304         if (flags & O_TRUNC) {
 305                 char null = '\0';
 306                 if (SMB_VFS_SETXATTR(
 307                             handle->conn, base, xattr_name,
 308                             &null, sizeof(null),
 309                             flags & O_EXCL ? XATTR_CREATE : 0) == -1) {
 310                         goto fail;
 311                 }
 312         }
 313
 314         sio = (struct stream_io *)VFS_ADD_FSP_EXTENSION(handle, fsp,
 315                                                         struct stream_io);
 316         if (sio == NULL) {
 317                 errno = ENOMEM;
 318                 goto fail;
 319         }
 320
 321         sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
 322                                         xattr_name);
 323         sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
 324                                   base);
 325
 326         if ((sio->xattr_name == NULL) || (sio->base == NULL)) {
 327                 errno = ENOMEM;
 328                 goto fail;
 329         }
 330
 331         TALLOC_FREE(frame);
 332         return hostfd;
 333
 334  fail:
 335         if (hostfd >= 0) {
 336                 /*
 337                  * BUGBUGBUG -- we would need to call fd_close_posix here, but
 338                  * we don't have a full fsp yet
 339                  */
 340                 SMB_VFS_CLOSE(fsp, hostfd);
 341         }
 342
 343         TALLOC_FREE(frame);
 344         return -1;
 345 }
 346
 347 static int streams_xattr_unlink(vfs_handle_struct *handle,  const char *fname)
 348 {
 349         NTSTATUS status;
 350         char *base = NULL;
 351         char *sname = NULL;
 352         int ret = -1;
 353         char *xattr_name;
 354
 355         if (!is_ntfs_stream_name(fname)) {
 356                 return SMB_VFS_NEXT_UNLINK(handle, fname);
 357         }
 358
 359         status = split_ntfs_stream_name(talloc_tos(), fname, &base, &sname);
 360         if (!NT_STATUS_IS_OK(status)) {
 361                 errno = EINVAL;
 362                 goto fail;
 363         }
 364
 365         xattr_name = talloc_asprintf(talloc_tos(), "%s%s",
 366                                      XATTR_DOSSTREAM_PREFIX, sname);
 367         if (xattr_name == NULL) {
 368                 errno = ENOMEM;
 369                 goto fail;
 370         }
 371
 372         ret = SMB_VFS_REMOVEXATTR(handle->conn, base, xattr_name);
 373
 374         if ((ret == -1) && (errno == ENOATTR)) {
 375                 errno = ENOENT;
 376                 goto fail;
 377         }
 378
 379         ret = 0;
 380
 381  fail:
 382         TALLOC_FREE(base);
 383         TALLOC_FREE(sname);
 384         return ret;
 385 }
 386
 387 static NTSTATUS walk_xattr_streams(connection_struct *conn, files_struct *fsp,
 388                                    const char *fname,
 389                                    bool (*fn)(struct ea_struct *ea,
 390                                               void *private_data),
 391                                    void *private_data)
 392 {
 393         NTSTATUS status;
 394         char **names;
 395         size_t i, num_names;
 396         size_t prefix_len = strlen(XATTR_DOSSTREAM_PREFIX);
 397
 398         status = get_ea_names_from_file(talloc_tos(), conn, fsp, fname,
 399                                         &names, &num_names);
 400         if (!NT_STATUS_IS_OK(status)) {
 401                 return status;
 402         }
 403
 404         for (i=0; i<num_names; i++) {
 405                 struct ea_struct ea;
 406
 407                 if (strncmp(names[i], XATTR_DOSSTREAM_PREFIX,
 408                             prefix_len) != 0) {
 409                         continue;
 410                 }
 411
 412                 status = get_ea_value(names, conn, fsp, fname, names[i], &ea);
 413                 if (!NT_STATUS_IS_OK(status)) {
 414                         DEBUG(10, ("Could not get ea %s for file %s: %s\n",
 415                                    names[i], fname, nt_errstr(status)));
 416                         continue;
 417                 }
 418
 419                 ea.name = talloc_asprintf(ea.value.data, ":%s",
 420                                           names[i] + prefix_len);
 421                 if (ea.name == NULL) {
 422                         DEBUG(0, ("talloc failed\n"));
 423                         continue;
 424                 }
 425
 426                 if (!fn(&ea, private_data)) {
 427                         TALLOC_FREE(ea.value.data);
 428                         return NT_STATUS_OK;
 429                 }
 430
 431                 TALLOC_FREE(ea.value.data);
 432         }
 433
 434         TALLOC_FREE(names);
 435         return NT_STATUS_OK;
 436 }
 437
 438 static bool add_one_stream(TALLOC_CTX *mem_ctx, unsigned int *num_streams,
 439                            struct stream_struct **streams,
 440                            const char *name, SMB_OFF_T size,
 441                            SMB_OFF_T alloc_size)
 442 {
 443         struct stream_struct *tmp;
 444
 445         tmp = TALLOC_REALLOC_ARRAY(mem_ctx, *streams, struct stream_struct,
 446                                    (*num_streams)+1);
 447         if (tmp == NULL) {
 448                 return false;
 449         }
 450
 451         tmp[*num_streams].name = talloc_strdup(tmp, name);
 452         if (tmp[*num_streams].name == NULL) {
 453                 return false;
 454         }
 455
 456         tmp[*num_streams].size = size;
 457         tmp[*num_streams].alloc_size = alloc_size;
 458
 459         *streams = tmp;
 460         *num_streams += 1;
 461         return true;
 462 }
 463
 464 struct streaminfo_state {
 465         TALLOC_CTX *mem_ctx;
 466         vfs_handle_struct *handle;
 467         unsigned int num_streams;
 468         struct stream_struct *streams;
 469         NTSTATUS status;
 470 };
 471
 472 static bool collect_one_stream(struct ea_struct *ea, void *private_data)
 473 {
 474         struct streaminfo_state *state =
 475                 (struct streaminfo_state *)private_data;
 476
 477         if (!add_one_stream(state->mem_ctx,
 478                             &state->num_streams, &state->streams,
 479                             ea->name, ea->value.length-1,
 480                             smb_roundup(state->handle->conn,
 481                                         ea->value.length-1))) {
 482                 state->status = NT_STATUS_NO_MEMORY;
 483                 return false;
 484         }
 485
 486         return true;
 487 }
 488
 489 static NTSTATUS streams_xattr_streaminfo(vfs_handle_struct *handle,
 490                                          struct files_struct *fsp,
 491                                          const char *fname,
 492                                          TALLOC_CTX *mem_ctx,
 493                                          unsigned int *pnum_streams,
 494                                          struct stream_struct **pstreams)
 495 {
 496         SMB_STRUCT_STAT sbuf;
 497         int ret;
 498         NTSTATUS status;
 499         struct streaminfo_state state;
 500
 501         if ((fsp != NULL) && (fsp->fh->fd != -1)) {
 502                 if (is_ntfs_stream_name(fsp->fsp_name)) {
 503                         return NT_STATUS_INVALID_PARAMETER;
 504                 }
 505                 ret = SMB_VFS_FSTAT(fsp, &sbuf);
 506         }
 507         else {
 508                 if (is_ntfs_stream_name(fname)) {
 509                         return NT_STATUS_INVALID_PARAMETER;
 510                 }
 511                 ret = SMB_VFS_STAT(handle->conn, fname, &sbuf);
 512         }
 513
 514         if (ret == -1) {
 515                 return map_nt_error_from_unix(errno);
 516         }
 517
 518         state.streams = NULL;
 519         state.num_streams = 0;
 520
 521         if (!S_ISDIR(sbuf.st_mode)) {
 522                 if (!add_one_stream(mem_ctx,
 523                                     &state.num_streams, &state.streams,
 524                                     "::$DATA", sbuf.st_size,
 525                                     get_allocation_size(handle->conn, fsp,
 526                                                         &sbuf))) {
 527                         return NT_STATUS_NO_MEMORY;
 528                 }
 529         }
 530
 531         state.mem_ctx = mem_ctx;
 532         state.handle = handle;
 533         state.status = NT_STATUS_OK;
 534
 535         status = walk_xattr_streams(handle->conn, fsp, fname,
 536                                     collect_one_stream, &state);
 537
 538         if (!NT_STATUS_IS_OK(status)) {
 539                 TALLOC_FREE(state.streams);
 540                 return status;
 541         }
 542
 543         if (!NT_STATUS_IS_OK(state.status)) {
 544                 TALLOC_FREE(state.streams);
 545                 return state.status;
 546         }
 547
 548         *pnum_streams = state.num_streams;
 549         *pstreams = state.streams;
 550         return NT_STATUS_OK;
 551 }
 552
 553 static int streams_xattr_statvfs(struct vfs_handle_struct *handle,
 554                                  const char *path,
 555                                  struct vfs_statvfs_struct *statbuf)
 556 {
 557         int ret;
 558
 559         ret = SMB_VFS_NEXT_STATVFS(handle, path, statbuf);
 560         statbuf->FsCapabilities |= FILE_NAMED_STREAMS;
 561         return ret;
 562
 563 }
 564
 565 static ssize_t streams_xattr_pwrite(vfs_handle_struct *handle,
 566                                     files_struct *fsp, const void *data,
 567                                     size_t n, SMB_OFF_T offset)
 568 {
 569         struct stream_io *sio =
 570                 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
 571         struct ea_struct ea;
 572         NTSTATUS status;
 573         int ret;
 574
 575         if (sio == NULL) {
 576                 return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
 577         }
 578
 579         status = get_ea_value(talloc_tos(), handle->conn, fsp->base_fsp,
 580                               sio->base, sio->xattr_name, &ea);
 581         if (!NT_STATUS_IS_OK(status)) {
 582                 return -1;
 583         }
 584
 585         if ((offset + n) > ea.value.length-1) {
 586                 uint8 *tmp;
 587
 588                 tmp = TALLOC_REALLOC_ARRAY(talloc_tos(), ea.value.data, uint8,
 589                                            offset + n + 1);
 590
 591                 if (tmp == NULL) {
 592                         TALLOC_FREE(ea.value.data);
 593                         errno = ENOMEM;
 594                         return -1;
 595                 }
 596                 ea.value.data = tmp;
 597                 ea.value.length = offset + n + 1;
 598                 ea.value.data[offset+n] = 0;
 599         }
 600
 601         memcpy(ea.value.data + offset, data, n);
 602
 603         ret = SMB_VFS_FSETXATTR(fsp->base_fsp, sio->xattr_name,
 604                                 ea.value.data, ea.value.length, 0);
 605
 606         TALLOC_FREE(ea.value.data);
 607
 608         return n;
 609 }
 610
 611 static ssize_t streams_xattr_pread(vfs_handle_struct *handle,
 612                                    files_struct *fsp, void *data,
 613                                    size_t n, SMB_OFF_T offset)
 614 {
 615         struct stream_io *sio =
 616                 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
 617         struct ea_struct ea;
 618         NTSTATUS status;
 619         size_t length, overlap;
 620
 621         if (sio == NULL) {
 622                 return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
 623         }
 624
 625         status = get_ea_value(talloc_tos(), handle->conn, fsp->base_fsp,
 626                               sio->base, sio->xattr_name, &ea);
 627         if (!NT_STATUS_IS_OK(status)) {
 628                 return -1;
 629         }
 630
 631         length = ea.value.length-1;
 632
 633         /* Attempt to read past EOF. */
 634         if (length <= offset) {
 635                 errno = EINVAL;
 636                 return -1;
 637         }
 638
 639         overlap = (offset + n) > length ? (length - offset) : n;
 640         memcpy(data, ea.value.data + offset, overlap);
 641
 642         TALLOC_FREE(ea.value.data);
 643         return overlap;
 644 }
 645
 646 /* VFS operations structure */
 647
 648 static vfs_op_tuple streams_xattr_ops[] = {
 649         {SMB_VFS_OP(streams_xattr_statvfs), SMB_VFS_OP_STATVFS,
 650          SMB_VFS_LAYER_TRANSPARENT},
 651         {SMB_VFS_OP(streams_xattr_open), SMB_VFS_OP_OPEN,
 652          SMB_VFS_LAYER_TRANSPARENT},
 653         {SMB_VFS_OP(streams_xattr_stat), SMB_VFS_OP_STAT,
 654          SMB_VFS_LAYER_TRANSPARENT},
 655         {SMB_VFS_OP(streams_xattr_fstat), SMB_VFS_OP_FSTAT,
 656          SMB_VFS_LAYER_TRANSPARENT},
 657         {SMB_VFS_OP(streams_xattr_lstat), SMB_VFS_OP_LSTAT,
 658          SMB_VFS_LAYER_TRANSPARENT},
 659         {SMB_VFS_OP(streams_xattr_pread), SMB_VFS_OP_PREAD,
 660          SMB_VFS_LAYER_TRANSPARENT},
 661         {SMB_VFS_OP(streams_xattr_pwrite), SMB_VFS_OP_PWRITE,
 662          SMB_VFS_LAYER_TRANSPARENT},
 663         {SMB_VFS_OP(streams_xattr_lstat), SMB_VFS_OP_LSTAT,
 664          SMB_VFS_LAYER_TRANSPARENT},
 665         {SMB_VFS_OP(streams_xattr_unlink), SMB_VFS_OP_UNLINK,
 666          SMB_VFS_LAYER_TRANSPARENT},
 667         {SMB_VFS_OP(streams_xattr_streaminfo), SMB_VFS_OP_STREAMINFO,
 668          SMB_VFS_LAYER_OPAQUE},
 669         {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
 670 };
 671
 672 NTSTATUS vfs_streams_xattr_init(void);
 673 NTSTATUS vfs_streams_xattr_init(void)
 674 {
 675         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "streams_xattr",
 676                                 streams_xattr_ops);
 677 }