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 #include "smbd/smbd.h"
  26 #include "system/filesys.h"
  27 #include "../lib/crypto/md5.h"
  28 #include "lib/util/tevent_unix.h"
  29
  30 #undef DBGC_CLASS
  31 #define DBGC_CLASS DBGC_VFS
  32
  33 struct streams_xattr_config {
  34         const char *prefix;
  35         size_t prefix_len;
  36         bool store_stream_type;
  37 };
  38
  39 struct stream_io {
  40         char *base;
  41         char *xattr_name;
  42         void *fsp_name_ptr;
  43         files_struct *fsp;
  44         vfs_handle_struct *handle;
  45 };
  46
  47 static SMB_INO_T stream_inode(const SMB_STRUCT_STAT *sbuf, const char *sname)
  48 {
  49         MD5_CTX ctx;
  50         unsigned char hash[16];
  51         SMB_INO_T result;
  52         char *upper_sname;
  53
  54         DEBUG(10, ("stream_inode called for %lu/%lu [%s]\n",
  55                    (unsigned long)sbuf->st_ex_dev,
  56                    (unsigned long)sbuf->st_ex_ino, sname));
  57
  58         upper_sname = talloc_strdup_upper(talloc_tos(), sname);
  59         SMB_ASSERT(upper_sname != NULL);
  60
  61         MD5Init(&ctx);
  62         MD5Update(&ctx, (const unsigned char *)&(sbuf->st_ex_dev),
  63                   sizeof(sbuf->st_ex_dev));
  64         MD5Update(&ctx, (const unsigned char *)&(sbuf->st_ex_ino),
  65                   sizeof(sbuf->st_ex_ino));
  66         MD5Update(&ctx, (unsigned char *)upper_sname,
  67                   talloc_get_size(upper_sname)-1);
  68         MD5Final(hash, &ctx);
  69
  70         TALLOC_FREE(upper_sname);
  71
  72         /* Hopefully all the variation is in the lower 4 (or 8) bytes! */
  73         memcpy(&result, hash, sizeof(result));
  74
  75         DEBUG(10, ("stream_inode returns %lu\n", (unsigned long)result));
  76
  77         return result;
  78 }
  79
  80 static ssize_t get_xattr_size(connection_struct *conn,
  81                                 const struct smb_filename *smb_fname,
  82                                 const char *xattr_name)
  83 {
  84         NTSTATUS status;
  85         struct ea_struct ea;
  86         ssize_t result;
  87
  88         status = get_ea_value(talloc_tos(), conn, NULL, smb_fname,
  89                               xattr_name, &ea);
  90
  91         if (!NT_STATUS_IS_OK(status)) {
  92                 return -1;
  93         }
  94
  95         result = ea.value.length-1;
  96         TALLOC_FREE(ea.value.data);
  97         return result;
  98 }
  99
 100 /**
 101  * Given a stream name, populate xattr_name with the xattr name to use for
 102  * accessing the stream.
 103  */
 104 static NTSTATUS streams_xattr_get_name(vfs_handle_struct *handle,
 105                                        TALLOC_CTX *ctx,
 106                                        const char *stream_name,
 107                                        char **xattr_name)
 108 {
 109         char *sname;
 110         char *stype;
 111         struct streams_xattr_config *config;
 112
 113         SMB_VFS_HANDLE_GET_DATA(handle, config, struct streams_xattr_config,
 114                                 return NT_STATUS_UNSUCCESSFUL);
 115
 116         sname = talloc_strdup(ctx, stream_name + 1);
 117         if (sname == NULL) {
 118                 return NT_STATUS_NO_MEMORY;
 119         }
 120
 121         /*
 122          * With vfs_fruit option "fruit:encoding = native" we're
 123          * already converting stream names that contain illegal NTFS
 124          * characters from their on-the-wire Unicode Private Range
 125          * encoding to their native ASCII representation.
 126          *
 127          * As as result the name of xattrs storing the streams (via
 128          * vfs_streams_xattr) may contain a colon, so we have to use
 129          * strrchr_m() instead of strchr_m() for matching the stream
 130          * type suffix.
 131          *
 132          * In check_path_syntax() we've already ensured the streamname
 133          * we got from the client is valid.
 134          */
 135         stype = strrchr_m(sname, ':');
 136
 137         if (stype) {
 138                 /*
 139                  * We only support one stream type: "$DATA"
 140                  */
 141                 if (strcasecmp_m(stype, ":$DATA") != 0) {
 142                         talloc_free(sname);
 143                         return NT_STATUS_INVALID_PARAMETER;
 144                 }
 145
 146                 /* Split name and type */
 147                 stype[0] = '\0';
 148         }
 149
 150         *xattr_name = talloc_asprintf(ctx, "%s%s%s",
 151                                       config->prefix,
 152                                       sname,
 153                                       config->store_stream_type ? ":$DATA" : "");
 154         if (*xattr_name == NULL) {
 155                 talloc_free(sname);
 156                 return NT_STATUS_NO_MEMORY;
 157         }
 158
 159         DEBUG(10, ("xattr_name: %s, stream_name: %s\n", *xattr_name,
 160                    stream_name));
 161
 162         talloc_free(sname);
 163         return NT_STATUS_OK;
 164 }
 165
 166 static bool streams_xattr_recheck(struct stream_io *sio)
 167 {
 168         NTSTATUS status;
 169         char *xattr_name = NULL;
 170
 171         if (sio->fsp->fsp_name == sio->fsp_name_ptr) {
 172                 return true;
 173         }
 174
 175         if (sio->fsp->fsp_name->stream_name == NULL) {
 176                 /* how can this happen */
 177                 errno = EINVAL;
 178                 return false;
 179         }
 180
 181         status = streams_xattr_get_name(sio->handle, talloc_tos(),
 182                                         sio->fsp->fsp_name->stream_name,
 183                                         &xattr_name);
 184         if (!NT_STATUS_IS_OK(status)) {
 185                 return false;
 186         }
 187
 188         TALLOC_FREE(sio->xattr_name);
 189         TALLOC_FREE(sio->base);
 190         sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio->handle, sio->fsp),
 191                                         xattr_name);
 192         sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio->handle, sio->fsp),
 193                                   sio->fsp->fsp_name->base_name);
 194         sio->fsp_name_ptr = sio->fsp->fsp_name;
 195
 196         TALLOC_FREE(xattr_name);
 197
 198         if ((sio->xattr_name == NULL) || (sio->base == NULL)) {
 199                 return false;
 200         }
 201
 202         return true;
 203 }
 204
 205 /**
 206  * Helper to stat/lstat the base file of an smb_fname.
 207  */
 208 static int streams_xattr_stat_base(vfs_handle_struct *handle,
 209                                    struct smb_filename *smb_fname,
 210                                    bool follow_links)
 211 {
 212         char *tmp_stream_name;
 213         int result;
 214
 215         tmp_stream_name = smb_fname->stream_name;
 216         smb_fname->stream_name = NULL;
 217         if (follow_links) {
 218                 result = SMB_VFS_NEXT_STAT(handle, smb_fname);
 219         } else {
 220                 result = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
 221         }
 222         smb_fname->stream_name = tmp_stream_name;
 223         return result;
 224 }
 225
 226 static int streams_xattr_fstat(vfs_handle_struct *handle, files_struct *fsp,
 227                                SMB_STRUCT_STAT *sbuf)
 228 {
 229         struct smb_filename *smb_fname_base = NULL;
 230         int ret = -1;
 231         struct stream_io *io = (struct stream_io *)
 232                 VFS_FETCH_FSP_EXTENSION(handle, fsp);
 233
 234         DBG_DEBUG("streams_xattr_fstat called for %s\n", fsp_str_dbg(io->fsp));
 235
 236         if (io == NULL || fsp->base_fsp == NULL) {
 237                 return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
 238         }
 239
 240         if (!streams_xattr_recheck(io)) {
 241                 return -1;
 242         }
 243
 244         /* Create an smb_filename with stream_name == NULL. */
 245         smb_fname_base = synthetic_smb_fname(talloc_tos(),
 246                                         io->base,
 247                                         NULL,
 248                                         NULL,
 249                                         fsp->fsp_name->flags);
 250         if (smb_fname_base == NULL) {
 251                 errno = ENOMEM;
 252                 return -1;
 253         }
 254
 255         if (smb_fname_base->flags & SMB_FILENAME_POSIX_PATH) {
 256                 ret = SMB_VFS_LSTAT(handle->conn, smb_fname_base);
 257         } else {
 258                 ret = SMB_VFS_STAT(handle->conn, smb_fname_base);
 259         }
 260         *sbuf = smb_fname_base->st;
 261
 262         if (ret == -1) {
 263                 TALLOC_FREE(smb_fname_base);
 264                 return -1;
 265         }
 266
 267         sbuf->st_ex_size = get_xattr_size(handle->conn,
 268                                         smb_fname_base, io->xattr_name);
 269         if (sbuf->st_ex_size == -1) {
 270                 TALLOC_FREE(smb_fname_base);
 271                 SET_STAT_INVALID(*sbuf);
 272                 return -1;
 273         }
 274
 275         DEBUG(10, ("sbuf->st_ex_size = %d\n", (int)sbuf->st_ex_size));
 276
 277         sbuf->st_ex_ino = stream_inode(sbuf, io->xattr_name);
 278         sbuf->st_ex_mode &= ~S_IFMT;
 279         sbuf->st_ex_mode |= S_IFREG;
 280         sbuf->st_ex_blocks = sbuf->st_ex_size / STAT_ST_BLOCKSIZE + 1;
 281
 282         TALLOC_FREE(smb_fname_base);
 283         return 0;
 284 }
 285
 286 static int streams_xattr_stat(vfs_handle_struct *handle,
 287                               struct smb_filename *smb_fname)
 288 {
 289         NTSTATUS status;
 290         int result = -1;
 291         char *xattr_name = NULL;
 292
 293         if (!is_ntfs_stream_smb_fname(smb_fname)) {
 294                 return SMB_VFS_NEXT_STAT(handle, smb_fname);
 295         }
 296
 297         /* Note if lp_posix_paths() is true, we can never
 298          * get here as is_ntfs_stream_smb_fname() is
 299          * always false. So we never need worry about
 300          * not following links here. */
 301
 302         /* If the default stream is requested, just stat the base file. */
 303         if (is_ntfs_default_stream_smb_fname(smb_fname)) {
 304                 return streams_xattr_stat_base(handle, smb_fname, true);
 305         }
 306
 307         /* Populate the stat struct with info from the base file. */
 308         if (streams_xattr_stat_base(handle, smb_fname, true) == -1) {
 309                 return -1;
 310         }
 311
 312         /* Derive the xattr name to lookup. */
 313         status = streams_xattr_get_name(handle, talloc_tos(),
 314                                         smb_fname->stream_name, &xattr_name);
 315         if (!NT_STATUS_IS_OK(status)) {
 316                 errno = map_errno_from_nt_status(status);
 317                 return -1;
 318         }
 319
 320         /* Augment the base file's stat information before returning. */
 321         smb_fname->st.st_ex_size = get_xattr_size(handle->conn,
 322                                                   smb_fname,
 323                                                   xattr_name);
 324         if (smb_fname->st.st_ex_size == -1) {
 325                 SET_STAT_INVALID(smb_fname->st);
 326                 errno = ENOENT;
 327                 result = -1;
 328                 goto fail;
 329         }
 330
 331         smb_fname->st.st_ex_ino = stream_inode(&smb_fname->st, xattr_name);
 332         smb_fname->st.st_ex_mode &= ~S_IFMT;
 333         smb_fname->st.st_ex_mode |= S_IFREG;
 334         smb_fname->st.st_ex_blocks =
 335             smb_fname->st.st_ex_size / STAT_ST_BLOCKSIZE + 1;
 336
 337         result = 0;
 338  fail:
 339         TALLOC_FREE(xattr_name);
 340         return result;
 341 }
 342
 343 static int streams_xattr_lstat(vfs_handle_struct *handle,
 344                                struct smb_filename *smb_fname)
 345 {
 346         NTSTATUS status;
 347         int result = -1;
 348         char *xattr_name = NULL;
 349
 350         if (!is_ntfs_stream_smb_fname(smb_fname)) {
 351                 return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
 352         }
 353
 354         /* If the default stream is requested, just stat the base file. */
 355         if (is_ntfs_default_stream_smb_fname(smb_fname)) {
 356                 return streams_xattr_stat_base(handle, smb_fname, false);
 357         }
 358
 359         /* Populate the stat struct with info from the base file. */
 360         if (streams_xattr_stat_base(handle, smb_fname, false) == -1) {
 361                 return -1;
 362         }
 363
 364         /* Derive the xattr name to lookup. */
 365         status = streams_xattr_get_name(handle, talloc_tos(),
 366                                         smb_fname->stream_name, &xattr_name);
 367         if (!NT_STATUS_IS_OK(status)) {
 368                 errno = map_errno_from_nt_status(status);
 369                 return -1;
 370         }
 371
 372         /* Augment the base file's stat information before returning. */
 373         smb_fname->st.st_ex_size = get_xattr_size(handle->conn,
 374                                                   smb_fname,
 375                                                   xattr_name);
 376         if (smb_fname->st.st_ex_size == -1) {
 377                 SET_STAT_INVALID(smb_fname->st);
 378                 errno = ENOENT;
 379                 result = -1;
 380                 goto fail;
 381         }
 382
 383         smb_fname->st.st_ex_ino = stream_inode(&smb_fname->st, xattr_name);
 384         smb_fname->st.st_ex_mode &= ~S_IFMT;
 385         smb_fname->st.st_ex_mode |= S_IFREG;
 386         smb_fname->st.st_ex_blocks =
 387             smb_fname->st.st_ex_size / STAT_ST_BLOCKSIZE + 1;
 388
 389         result = 0;
 390
 391  fail:
 392         TALLOC_FREE(xattr_name);
 393         return result;
 394 }
 395
 396 static int streams_xattr_open(vfs_handle_struct *handle,
 397                               struct smb_filename *smb_fname,
 398                               files_struct *fsp, int flags, mode_t mode)
 399 {
 400         NTSTATUS status;
 401         struct smb_filename *smb_fname_base = NULL;
 402         struct stream_io *sio;
 403         struct ea_struct ea;
 404         char *xattr_name = NULL;
 405         int baseflags;
 406         int hostfd = -1;
 407         int ret;
 408
 409         DEBUG(10, ("streams_xattr_open called for %s with flags 0x%x\n",
 410                    smb_fname_str_dbg(smb_fname), flags));
 411
 412         if (!is_ntfs_stream_smb_fname(smb_fname)) {
 413                 return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 414         }
 415
 416         /* If the default stream is requested, just open the base file. */
 417         if (is_ntfs_default_stream_smb_fname(smb_fname)) {
 418                 char *tmp_stream_name;
 419
 420                 tmp_stream_name = smb_fname->stream_name;
 421                 smb_fname->stream_name = NULL;
 422
 423                 ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 424
 425                 smb_fname->stream_name = tmp_stream_name;
 426
 427                 return ret;
 428         }
 429
 430         status = streams_xattr_get_name(handle, talloc_tos(),
 431                                         smb_fname->stream_name, &xattr_name);
 432         if (!NT_STATUS_IS_OK(status)) {
 433                 errno = map_errno_from_nt_status(status);
 434                 goto fail;
 435         }
 436
 437         /* Create an smb_filename with stream_name == NULL. */
 438         smb_fname_base = synthetic_smb_fname(talloc_tos(),
 439                                 smb_fname->base_name,
 440                                 NULL,
 441                                 NULL,
 442                                 smb_fname->flags);
 443         if (smb_fname_base == NULL) {
 444                 errno = ENOMEM;
 445                 goto fail;
 446         }
 447
 448         /*
 449          * We use baseflags to turn off nasty side-effects when opening the
 450          * underlying file.
 451          */
 452         baseflags = flags;
 453         baseflags &= ~O_TRUNC;
 454         baseflags &= ~O_EXCL;
 455         baseflags &= ~O_CREAT;
 456
 457         hostfd = SMB_VFS_NEXT_OPEN(handle, smb_fname_base, fsp,
 458                                    baseflags, mode);
 459
 460         /* It is legit to open a stream on a directory, but the base
 461          * fd has to be read-only.
 462          */
 463         if ((hostfd == -1) && (errno == EISDIR)) {
 464                 baseflags &= ~O_ACCMODE;
 465                 baseflags |= O_RDONLY;
 466                 hostfd = SMB_VFS_NEXT_OPEN(handle, smb_fname_base, fsp, baseflags,
 467                                            mode);
 468         }
 469
 470         TALLOC_FREE(smb_fname_base);
 471
 472         if (hostfd == -1) {
 473                 goto fail;
 474         }
 475
 476         status = get_ea_value(talloc_tos(), handle->conn, NULL,
 477                               smb_fname, xattr_name, &ea);
 478
 479         DEBUG(10, ("get_ea_value returned %s\n", nt_errstr(status)));
 480
 481         if (!NT_STATUS_IS_OK(status)
 482             && !NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 483                 /*
 484                  * The base file is not there. This is an error even if we got
 485                  * O_CREAT, the higher levels should have created the base
 486                  * file for us.
 487                  */
 488                 DEBUG(10, ("streams_xattr_open: base file %s not around, "
 489                            "returning ENOENT\n", smb_fname->base_name));
 490                 errno = ENOENT;
 491                 goto fail;
 492         }
 493
 494         if ((!NT_STATUS_IS_OK(status) && (flags & O_CREAT)) ||
 495             (flags & O_TRUNC)) {
 496                 /*
 497                  * The attribute does not exist or needs to be truncated
 498                  */
 499
 500                 /*
 501                  * Darn, xattrs need at least 1 byte
 502                  */
 503                 char null = '\0';
 504
 505                 DEBUG(10, ("creating or truncating attribute %s on file %s\n",
 506                            xattr_name, smb_fname->base_name));
 507
 508                 ret = SMB_VFS_SETXATTR(fsp->conn,
 509                                        smb_fname,
 510                                        xattr_name,
 511                                        &null, sizeof(null),
 512                                        flags & O_EXCL ? XATTR_CREATE : 0);
 513                 if (ret != 0) {
 514                         goto fail;
 515                 }
 516         }
 517
 518         sio = (struct stream_io *)VFS_ADD_FSP_EXTENSION(handle, fsp,
 519                                                         struct stream_io,
 520                                                         NULL);
 521         if (sio == NULL) {
 522                 errno = ENOMEM;
 523                 goto fail;
 524         }
 525
 526         sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
 527                                         xattr_name);
 528         /*
 529          * so->base needs to be a copy of fsp->fsp_name->base_name,
 530          * making it identical to streams_xattr_recheck(). If the
 531          * open is changing directories, fsp->fsp_name->base_name
 532          * will be the full path from the share root, whilst
 533          * smb_fname will be relative to the $cwd.
 534          */
 535         sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
 536                                   fsp->fsp_name->base_name);
 537         sio->fsp_name_ptr = fsp->fsp_name;
 538         sio->handle = handle;
 539         sio->fsp = fsp;
 540
 541         if ((sio->xattr_name == NULL) || (sio->base == NULL)) {
 542                 errno = ENOMEM;
 543                 goto fail;
 544         }
 545
 546         return hostfd;
 547
 548  fail:
 549         if (hostfd >= 0) {
 550                 /*
 551                  * BUGBUGBUG -- we would need to call fd_close_posix here, but
 552                  * we don't have a full fsp yet
 553                  */
 554                 fsp->fh->fd = hostfd;
 555                 SMB_VFS_NEXT_CLOSE(handle, fsp);
 556         }
 557
 558         return -1;
 559 }
 560
 561 static int streams_xattr_unlink(vfs_handle_struct *handle,
 562                                 const struct smb_filename *smb_fname)
 563 {
 564         NTSTATUS status;
 565         int ret = -1;
 566         char *xattr_name = NULL;
 567
 568         if (!is_ntfs_stream_smb_fname(smb_fname)) {
 569                 return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 570         }
 571
 572         /* If the default stream is requested, just open the base file. */
 573         if (is_ntfs_default_stream_smb_fname(smb_fname)) {
 574                 struct smb_filename *smb_fname_base = NULL;
 575
 576                 smb_fname_base = cp_smb_filename(talloc_tos(), smb_fname);
 577                 if (smb_fname_base == NULL) {
 578                         errno = ENOMEM;
 579                         return -1;
 580                 }
 581
 582                 ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_base);
 583
 584                 TALLOC_FREE(smb_fname_base);
 585                 return ret;
 586         }
 587
 588         status = streams_xattr_get_name(handle, talloc_tos(),
 589                                         smb_fname->stream_name, &xattr_name);
 590         if (!NT_STATUS_IS_OK(status)) {
 591                 errno = map_errno_from_nt_status(status);
 592                 goto fail;
 593         }
 594
 595         ret = SMB_VFS_REMOVEXATTR(handle->conn, smb_fname, xattr_name);
 596
 597         if ((ret == -1) && (errno == ENOATTR)) {
 598                 errno = ENOENT;
 599                 goto fail;
 600         }
 601
 602         ret = 0;
 603
 604  fail:
 605         TALLOC_FREE(xattr_name);
 606         return ret;
 607 }
 608
 609 static int streams_xattr_rename(vfs_handle_struct *handle,
 610                                 const struct smb_filename *smb_fname_src,
 611                                 const struct smb_filename *smb_fname_dst)
 612 {
 613         NTSTATUS status;
 614         int ret = -1;
 615         char *src_xattr_name = NULL;
 616         char *dst_xattr_name = NULL;
 617         bool src_is_stream, dst_is_stream;
 618         ssize_t oret;
 619         ssize_t nret;
 620         struct ea_struct ea;
 621
 622         src_is_stream = is_ntfs_stream_smb_fname(smb_fname_src);
 623         dst_is_stream = is_ntfs_stream_smb_fname(smb_fname_dst);
 624
 625         if (!src_is_stream && !dst_is_stream) {
 626                 return SMB_VFS_NEXT_RENAME(handle, smb_fname_src,
 627                                            smb_fname_dst);
 628         }
 629
 630         /* For now don't allow renames from or to the default stream. */
 631         if (is_ntfs_default_stream_smb_fname(smb_fname_src) ||
 632             is_ntfs_default_stream_smb_fname(smb_fname_dst)) {
 633                 errno = ENOSYS;
 634                 goto done;
 635         }
 636
 637         /* Don't rename if the streams are identical. */
 638         if (strcasecmp_m(smb_fname_src->stream_name,
 639                        smb_fname_dst->stream_name) == 0) {
 640                 goto done;
 641         }
 642
 643         /* Get the xattr names. */
 644         status = streams_xattr_get_name(handle, talloc_tos(),
 645                                         smb_fname_src->stream_name,
 646                                         &src_xattr_name);
 647         if (!NT_STATUS_IS_OK(status)) {
 648                 errno = map_errno_from_nt_status(status);
 649                 goto fail;
 650         }
 651         status = streams_xattr_get_name(handle, talloc_tos(),
 652                                         smb_fname_dst->stream_name,
 653                                         &dst_xattr_name);
 654         if (!NT_STATUS_IS_OK(status)) {
 655                 errno = map_errno_from_nt_status(status);
 656                 goto fail;
 657         }
 658
 659         /* read the old stream */
 660         status = get_ea_value(talloc_tos(), handle->conn, NULL,
 661                               smb_fname_src, src_xattr_name, &ea);
 662         if (!NT_STATUS_IS_OK(status)) {
 663                 errno = ENOENT;
 664                 goto fail;
 665         }
 666
 667         /* (over)write the new stream */
 668         nret = SMB_VFS_SETXATTR(handle->conn, smb_fname_src,
 669                                 dst_xattr_name, ea.value.data, ea.value.length,
 670                                 0);
 671         if (nret < 0) {
 672                 if (errno == ENOATTR) {
 673                         errno = ENOENT;
 674                 }
 675                 goto fail;
 676         }
 677
 678         /* remove the old stream */
 679         oret = SMB_VFS_REMOVEXATTR(handle->conn, smb_fname_src,
 680                                    src_xattr_name);
 681         if (oret < 0) {
 682                 if (errno == ENOATTR) {
 683                         errno = ENOENT;
 684                 }
 685                 goto fail;
 686         }
 687
 688  done:
 689         errno = 0;
 690         ret = 0;
 691  fail:
 692         TALLOC_FREE(src_xattr_name);
 693         TALLOC_FREE(dst_xattr_name);
 694         return ret;
 695 }
 696
 697 static NTSTATUS walk_xattr_streams(vfs_handle_struct *handle,
 698                                 files_struct *fsp,
 699                                 const struct smb_filename *smb_fname,
 700                                 bool (*fn)(struct ea_struct *ea,
 701                                         void *private_data),
 702                                 void *private_data)
 703 {
 704         NTSTATUS status;
 705         char **names;
 706         size_t i, num_names;
 707         struct streams_xattr_config *config;
 708
 709         SMB_VFS_HANDLE_GET_DATA(handle, config, struct streams_xattr_config,
 710                                 return NT_STATUS_UNSUCCESSFUL);
 711
 712         status = get_ea_names_from_file(talloc_tos(),
 713                                 handle->conn,
 714                                 fsp,
 715                                 smb_fname,
 716                                 &names,
 717                                 &num_names);
 718         if (!NT_STATUS_IS_OK(status)) {
 719                 return status;
 720         }
 721
 722         for (i=0; i<num_names; i++) {
 723                 struct ea_struct ea;
 724
 725                 /*
 726                  * We want to check with samba_private_attr_name()
 727                  * whether the xattr name is a private one,
 728                  * unfortunately it flags xattrs that begin with the
 729                  * default streams prefix as private.
 730                  *
 731                  * By only calling samba_private_attr_name() in case
 732                  * the xattr does NOT begin with the default prefix,
 733                  * we know that if it returns 'true' it definitely one
 734                  * of our internal xattr like "user.DOSATTRIB".
 735                  */
 736                 if (strncasecmp_m(names[i], SAMBA_XATTR_DOSSTREAM_PREFIX,
 737                                   strlen(SAMBA_XATTR_DOSSTREAM_PREFIX)) != 0) {
 738                         if (samba_private_attr_name(names[i])) {
 739                                 continue;
 740                         }
 741                 }
 742
 743                 if (strncmp(names[i], config->prefix,
 744                             config->prefix_len) != 0) {
 745                         continue;
 746                 }
 747
 748                 status = get_ea_value(names,
 749                                         handle->conn,
 750                                         NULL,
 751                                         smb_fname,
 752                                         names[i],
 753                                         &ea);
 754                 if (!NT_STATUS_IS_OK(status)) {
 755                         DEBUG(10, ("Could not get ea %s for file %s: %s\n",
 756                                 names[i],
 757                                 smb_fname->base_name,
 758                                 nt_errstr(status)));
 759                         continue;
 760                 }
 761
 762                 ea.name = talloc_asprintf(
 763                         ea.value.data, ":%s%s",
 764                         names[i] + config->prefix_len,
 765                         config->store_stream_type ? "" : ":$DATA");
 766                 if (ea.name == NULL) {
 767                         DEBUG(0, ("talloc failed\n"));
 768                         continue;
 769                 }
 770
 771                 if (!fn(&ea, private_data)) {
 772                         TALLOC_FREE(ea.value.data);
 773                         return NT_STATUS_OK;
 774                 }
 775
 776                 TALLOC_FREE(ea.value.data);
 777         }
 778
 779         TALLOC_FREE(names);
 780         return NT_STATUS_OK;
 781 }
 782
 783 static bool add_one_stream(TALLOC_CTX *mem_ctx, unsigned int *num_streams,
 784                            struct stream_struct **streams,
 785                            const char *name, off_t size,
 786                            off_t alloc_size)
 787 {
 788         struct stream_struct *tmp;
 789
 790         tmp = talloc_realloc(mem_ctx, *streams, struct stream_struct,
 791                                    (*num_streams)+1);
 792         if (tmp == NULL) {
 793                 return false;
 794         }
 795
 796         tmp[*num_streams].name = talloc_strdup(tmp, name);
 797         if (tmp[*num_streams].name == NULL) {
 798                 return false;
 799         }
 800
 801         tmp[*num_streams].size = size;
 802         tmp[*num_streams].alloc_size = alloc_size;
 803
 804         *streams = tmp;
 805         *num_streams += 1;
 806         return true;
 807 }
 808
 809 struct streaminfo_state {
 810         TALLOC_CTX *mem_ctx;
 811         vfs_handle_struct *handle;
 812         unsigned int num_streams;
 813         struct stream_struct *streams;
 814         NTSTATUS status;
 815 };
 816
 817 static bool collect_one_stream(struct ea_struct *ea, void *private_data)
 818 {
 819         struct streaminfo_state *state =
 820                 (struct streaminfo_state *)private_data;
 821
 822         if (!add_one_stream(state->mem_ctx,
 823                             &state->num_streams, &state->streams,
 824                             ea->name, ea->value.length-1,
 825                             smb_roundup(state->handle->conn,
 826                                         ea->value.length-1))) {
 827                 state->status = NT_STATUS_NO_MEMORY;
 828                 return false;
 829         }
 830
 831         return true;
 832 }
 833
 834 static NTSTATUS streams_xattr_streaminfo(vfs_handle_struct *handle,
 835                                          struct files_struct *fsp,
 836                                          const struct smb_filename *smb_fname,
 837                                          TALLOC_CTX *mem_ctx,
 838                                          unsigned int *pnum_streams,
 839                                          struct stream_struct **pstreams)
 840 {
 841         SMB_STRUCT_STAT sbuf;
 842         int ret;
 843         NTSTATUS status;
 844         struct streaminfo_state state;
 845
 846         ret = vfs_stat_smb_basename(handle->conn, smb_fname, &sbuf);
 847         if (ret == -1) {
 848                 return map_nt_error_from_unix(errno);
 849         }
 850
 851         state.streams = *pstreams;
 852         state.num_streams = *pnum_streams;
 853         state.mem_ctx = mem_ctx;
 854         state.handle = handle;
 855         state.status = NT_STATUS_OK;
 856
 857         if (S_ISLNK(sbuf.st_ex_mode)) {
 858                 /*
 859                  * Currently we do't have SMB_VFS_LLISTXATTR
 860                  * inside the VFS which means there's no way
 861                  * to cope with a symlink when lp_posix_pathnames().
 862                  * returns true. For now ignore links.
 863                  * FIXME - by adding SMB_VFS_LLISTXATTR. JRA.
 864                  */
 865                 status = NT_STATUS_OK;
 866         } else {
 867                 status = walk_xattr_streams(handle, fsp, smb_fname,
 868                                     collect_one_stream, &state);
 869         }
 870
 871         if (!NT_STATUS_IS_OK(status)) {
 872                 TALLOC_FREE(state.streams);
 873                 return status;
 874         }
 875
 876         if (!NT_STATUS_IS_OK(state.status)) {
 877                 TALLOC_FREE(state.streams);
 878                 return state.status;
 879         }
 880
 881         *pnum_streams = state.num_streams;
 882         *pstreams = state.streams;
 883
 884         return SMB_VFS_NEXT_STREAMINFO(handle,
 885                         fsp,
 886                         smb_fname,
 887                         mem_ctx,
 888                         pnum_streams,
 889                         pstreams);
 890 }
 891
 892 static uint32_t streams_xattr_fs_capabilities(struct vfs_handle_struct *handle,
 893                         enum timestamp_set_resolution *p_ts_res)
 894 {
 895         return SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res) | FILE_NAMED_STREAMS;
 896 }
 897
 898 static int streams_xattr_connect(vfs_handle_struct *handle,
 899                                  const char *service, const char *user)
 900 {
 901         struct streams_xattr_config *config;
 902         const char *default_prefix = SAMBA_XATTR_DOSSTREAM_PREFIX;
 903         const char *prefix;
 904         int rc;
 905
 906         rc = SMB_VFS_NEXT_CONNECT(handle, service, user);
 907         if (rc != 0) {
 908                 return rc;
 909         }
 910
 911         config = talloc_zero(handle->conn, struct streams_xattr_config);
 912         if (config == NULL) {
 913                 DEBUG(1, ("talloc_zero() failed\n"));
 914                 errno = ENOMEM;
 915                 return -1;
 916         }
 917
 918         prefix = lp_parm_const_string(SNUM(handle->conn),
 919                                       "streams_xattr", "prefix",
 920                                       default_prefix);
 921         config->prefix = talloc_strdup(config, prefix);
 922         if (config->prefix == NULL) {
 923                 DEBUG(1, ("talloc_strdup() failed\n"));
 924                 errno = ENOMEM;
 925                 return -1;
 926         }
 927         config->prefix_len = strlen(config->prefix);
 928         DEBUG(10, ("streams_xattr using stream prefix: %s\n", config->prefix));
 929
 930         config->store_stream_type = lp_parm_bool(SNUM(handle->conn),
 931                                                  "streams_xattr",
 932                                                  "store_stream_type",
 933                                                  true);
 934
 935         SMB_VFS_HANDLE_SET_DATA(handle, config,
 936                                 NULL, struct stream_xattr_config,
 937                                 return -1);
 938
 939         return 0;
 940 }
 941
 942 static ssize_t streams_xattr_pwrite(vfs_handle_struct *handle,
 943                                     files_struct *fsp, const void *data,
 944                                     size_t n, off_t offset)
 945 {
 946         struct stream_io *sio =
 947                 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
 948         struct ea_struct ea;
 949         NTSTATUS status;
 950         struct smb_filename *smb_fname_base = NULL;
 951         int ret;
 952
 953         DEBUG(10, ("streams_xattr_pwrite called for %d bytes\n", (int)n));
 954
 955         if (sio == NULL) {
 956                 return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
 957         }
 958
 959         if (!streams_xattr_recheck(sio)) {
 960                 return -1;
 961         }
 962
 963         /* Create an smb_filename with stream_name == NULL. */
 964         smb_fname_base = synthetic_smb_fname(talloc_tos(),
 965                                         sio->base,
 966                                         NULL,
 967                                         NULL,
 968                                         fsp->fsp_name->flags);
 969         if (smb_fname_base == NULL) {
 970                 errno = ENOMEM;
 971                 return -1;
 972         }
 973
 974         status = get_ea_value(talloc_tos(), handle->conn, NULL,
 975                               smb_fname_base, sio->xattr_name, &ea);
 976         if (!NT_STATUS_IS_OK(status)) {
 977                 return -1;
 978         }
 979
 980         if ((offset + n) > ea.value.length-1) {
 981                 uint8_t *tmp;
 982
 983                 tmp = talloc_realloc(talloc_tos(), ea.value.data, uint8_t,
 984                                            offset + n + 1);
 985
 986                 if (tmp == NULL) {
 987                         TALLOC_FREE(ea.value.data);
 988                         errno = ENOMEM;
 989                         return -1;
 990                 }
 991                 ea.value.data = tmp;
 992                 ea.value.length = offset + n + 1;
 993                 ea.value.data[offset+n] = 0;
 994         }
 995
 996         memcpy(ea.value.data + offset, data, n);
 997
 998         ret = SMB_VFS_SETXATTR(fsp->conn,
 999                                fsp->fsp_name,
1000                                sio->xattr_name,
1001                                ea.value.data, ea.value.length, 0);
1002         TALLOC_FREE(ea.value.data);
1003
1004         if (ret == -1) {
1005                 return -1;
1006         }
1007
1008         return n;
1009 }
1010
1011 static ssize_t streams_xattr_pread(vfs_handle_struct *handle,
1012                                    files_struct *fsp, void *data,
1013                                    size_t n, off_t offset)
1014 {
1015         struct stream_io *sio =
1016                 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1017         struct ea_struct ea;
1018         NTSTATUS status;
1019         size_t length, overlap;
1020         struct smb_filename *smb_fname_base = NULL;
1021
1022         DEBUG(10, ("streams_xattr_pread: offset=%d, size=%d\n",
1023                    (int)offset, (int)n));
1024
1025         if (sio == NULL) {
1026                 return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
1027         }
1028
1029         if (!streams_xattr_recheck(sio)) {
1030                 return -1;
1031         }
1032
1033         /* Create an smb_filename with stream_name == NULL. */
1034         smb_fname_base = synthetic_smb_fname(talloc_tos(),
1035                                         sio->base,
1036                                         NULL,
1037                                         NULL,
1038                                         fsp->fsp_name->flags);
1039         if (smb_fname_base == NULL) {
1040                 errno = ENOMEM;
1041                 return -1;
1042         }
1043
1044         status = get_ea_value(talloc_tos(), handle->conn, NULL,
1045                               smb_fname_base, sio->xattr_name, &ea);
1046         if (!NT_STATUS_IS_OK(status)) {
1047                 return -1;
1048         }
1049
1050         length = ea.value.length-1;
1051
1052         DEBUG(10, ("streams_xattr_pread: get_ea_value returned %d bytes\n",
1053                    (int)length));
1054
1055         /* Attempt to read past EOF. */
1056         if (length <= offset) {
1057                 return 0;
1058         }
1059
1060         overlap = (offset + n) > length ? (length - offset) : n;
1061         memcpy(data, ea.value.data + offset, overlap);
1062
1063         TALLOC_FREE(ea.value.data);
1064         return overlap;
1065 }
1066
1067 struct streams_xattr_pread_state {
1068         ssize_t nread;
1069         struct vfs_aio_state vfs_aio_state;
1070 };
1071
1072 static void streams_xattr_pread_done(struct tevent_req *subreq);
1073
1074 static struct tevent_req *streams_xattr_pread_send(
1075         struct vfs_handle_struct *handle,
1076         TALLOC_CTX *mem_ctx,
1077         struct tevent_context *ev,
1078         struct files_struct *fsp,
1079         void *data,
1080         size_t n, off_t offset)
1081 {
1082         struct tevent_req *req = NULL;
1083         struct tevent_req *subreq = NULL;
1084         struct streams_xattr_pread_state *state = NULL;
1085         struct stream_io *sio =
1086                 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1087
1088         req = tevent_req_create(mem_ctx, &state,
1089                                 struct streams_xattr_pread_state);
1090         if (req == NULL) {
1091                 return NULL;
1092         }
1093
1094         if (sio == NULL) {
1095                 subreq = SMB_VFS_NEXT_PREAD_SEND(state, ev, handle, fsp,
1096                                                  data, n, offset);
1097                 if (tevent_req_nomem(req, subreq)) {
1098                         return tevent_req_post(req, ev);
1099                 }
1100                 tevent_req_set_callback(subreq, streams_xattr_pread_done, req);
1101                 return req;
1102         }
1103
1104         state->nread = SMB_VFS_PREAD(fsp, data, n, offset);
1105         if (state->nread != n) {
1106                 if (state->nread != -1) {
1107                         errno = EIO;
1108                 }
1109                 tevent_req_error(req, errno);
1110                 return tevent_req_post(req, ev);
1111         }
1112
1113         tevent_req_done(req);
1114         return tevent_req_post(req, ev);
1115 }
1116
1117 static void streams_xattr_pread_done(struct tevent_req *subreq)
1118 {
1119         struct tevent_req *req = tevent_req_callback_data(
1120                 subreq, struct tevent_req);
1121         struct streams_xattr_pread_state *state = tevent_req_data(
1122                 req, struct streams_xattr_pread_state);
1123
1124         state->nread = SMB_VFS_PREAD_RECV(subreq, &state->vfs_aio_state);
1125         TALLOC_FREE(subreq);
1126
1127         if (tevent_req_error(req, state->vfs_aio_state.error)) {
1128                 return;
1129         }
1130         tevent_req_done(req);
1131 }
1132
1133 static ssize_t streams_xattr_pread_recv(struct tevent_req *req,
1134                                         struct vfs_aio_state *vfs_aio_state)
1135 {
1136         struct streams_xattr_pread_state *state = tevent_req_data(
1137                 req, struct streams_xattr_pread_state);
1138
1139         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1140                 return -1;
1141         }
1142
1143         *vfs_aio_state = state->vfs_aio_state;
1144         return state->nread;
1145 }
1146
1147 struct streams_xattr_pwrite_state {
1148         ssize_t nwritten;
1149         struct vfs_aio_state vfs_aio_state;
1150 };
1151
1152 static void streams_xattr_pwrite_done(struct tevent_req *subreq);
1153
1154 static struct tevent_req *streams_xattr_pwrite_send(
1155         struct vfs_handle_struct *handle,
1156         TALLOC_CTX *mem_ctx,
1157         struct tevent_context *ev,
1158         struct files_struct *fsp,
1159         const void *data,
1160         size_t n, off_t offset)
1161 {
1162         struct tevent_req *req = NULL;
1163         struct tevent_req *subreq = NULL;
1164         struct streams_xattr_pwrite_state *state = NULL;
1165         struct stream_io *sio =
1166                 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1167
1168         req = tevent_req_create(mem_ctx, &state,
1169                                 struct streams_xattr_pwrite_state);
1170         if (req == NULL) {
1171                 return NULL;
1172         }
1173
1174         if (sio == NULL) {
1175                 subreq = SMB_VFS_NEXT_PWRITE_SEND(state, ev, handle, fsp,
1176                                                   data, n, offset);
1177                 if (tevent_req_nomem(req, subreq)) {
1178                         return tevent_req_post(req, ev);
1179                 }
1180                 tevent_req_set_callback(subreq, streams_xattr_pwrite_done, req);
1181                 return req;
1182         }
1183
1184         state->nwritten = SMB_VFS_PWRITE(fsp, data, n, offset);
1185         if (state->nwritten != n) {
1186                 if (state->nwritten != -1) {
1187                         errno = EIO;
1188                 }
1189                 tevent_req_error(req, errno);
1190                 return tevent_req_post(req, ev);
1191         }
1192
1193         tevent_req_done(req);
1194         return tevent_req_post(req, ev);
1195 }
1196
1197 static void streams_xattr_pwrite_done(struct tevent_req *subreq)
1198 {
1199         struct tevent_req *req = tevent_req_callback_data(
1200                 subreq, struct tevent_req);
1201         struct streams_xattr_pwrite_state *state = tevent_req_data(
1202                 req, struct streams_xattr_pwrite_state);
1203
1204         state->nwritten = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
1205         TALLOC_FREE(subreq);
1206
1207         if (tevent_req_error(req, state->vfs_aio_state.error)) {
1208                 return;
1209         }
1210         tevent_req_done(req);
1211 }
1212
1213 static ssize_t streams_xattr_pwrite_recv(struct tevent_req *req,
1214                                          struct vfs_aio_state *vfs_aio_state)
1215 {
1216         struct streams_xattr_pwrite_state *state = tevent_req_data(
1217                 req, struct streams_xattr_pwrite_state);
1218
1219         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1220                 return -1;
1221         }
1222
1223         *vfs_aio_state = state->vfs_aio_state;
1224         return state->nwritten;
1225 }
1226
1227 static int streams_xattr_ftruncate(struct vfs_handle_struct *handle,
1228                                         struct files_struct *fsp,
1229                                         off_t offset)
1230 {
1231         int ret;
1232         uint8_t *tmp;
1233         struct ea_struct ea;
1234         NTSTATUS status;
1235         struct stream_io *sio =
1236                 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1237         struct smb_filename *smb_fname_base = NULL;
1238
1239         DEBUG(10, ("streams_xattr_ftruncate called for file %s offset %.0f\n",
1240                    fsp_str_dbg(fsp), (double)offset));
1241
1242         if (sio == NULL) {
1243                 return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
1244         }
1245
1246         if (!streams_xattr_recheck(sio)) {
1247                 return -1;
1248         }
1249
1250         /* Create an smb_filename with stream_name == NULL. */
1251         smb_fname_base = synthetic_smb_fname(talloc_tos(),
1252                                         sio->base,
1253                                         NULL,
1254                                         NULL,
1255                                         fsp->fsp_name->flags);
1256         if (smb_fname_base == NULL) {
1257                 errno = ENOMEM;
1258                 return -1;
1259         }
1260
1261         status = get_ea_value(talloc_tos(), handle->conn, NULL,
1262                               smb_fname_base, sio->xattr_name, &ea);
1263         if (!NT_STATUS_IS_OK(status)) {
1264                 return -1;
1265         }
1266
1267         tmp = talloc_realloc(talloc_tos(), ea.value.data, uint8_t,
1268                                    offset + 1);
1269
1270         if (tmp == NULL) {
1271                 TALLOC_FREE(ea.value.data);
1272                 errno = ENOMEM;
1273                 return -1;
1274         }
1275
1276         /* Did we expand ? */
1277         if (ea.value.length < offset + 1) {
1278                 memset(&tmp[ea.value.length], '\0',
1279                         offset + 1 - ea.value.length);
1280         }
1281
1282         ea.value.data = tmp;
1283         ea.value.length = offset + 1;
1284         ea.value.data[offset] = 0;
1285
1286         ret = SMB_VFS_SETXATTR(fsp->conn,
1287                                fsp->fsp_name,
1288                                sio->xattr_name,
1289                                ea.value.data, ea.value.length, 0);
1290         TALLOC_FREE(ea.value.data);
1291
1292         if (ret == -1) {
1293                 return -1;
1294         }
1295
1296         return 0;
1297 }
1298
1299 static int streams_xattr_fallocate(struct vfs_handle_struct *handle,
1300                                         struct files_struct *fsp,
1301                                         uint32_t mode,
1302                                         off_t offset,
1303                                         off_t len)
1304 {
1305         struct stream_io *sio =
1306                 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1307
1308         DEBUG(10, ("streams_xattr_fallocate called for file %s offset %.0f"
1309                 "len = %.0f\n",
1310                 fsp_str_dbg(fsp), (double)offset, (double)len));
1311
1312         if (sio == NULL) {
1313                 return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
1314         }
1315
1316         if (!streams_xattr_recheck(sio)) {
1317                 return -1;
1318         }
1319
1320         /* Let the pwrite code path handle it. */
1321         errno = ENOSYS;
1322         return -1;
1323 }
1324
1325
1326 static struct vfs_fn_pointers vfs_streams_xattr_fns = {
1327         .fs_capabilities_fn = streams_xattr_fs_capabilities,
1328         .connect_fn = streams_xattr_connect,
1329         .open_fn = streams_xattr_open,
1330         .stat_fn = streams_xattr_stat,
1331         .fstat_fn = streams_xattr_fstat,
1332         .lstat_fn = streams_xattr_lstat,
1333         .pread_fn = streams_xattr_pread,
1334         .pwrite_fn = streams_xattr_pwrite,
1335         .pread_send_fn = streams_xattr_pread_send,
1336         .pread_recv_fn = streams_xattr_pread_recv,
1337         .pwrite_send_fn = streams_xattr_pwrite_send,
1338         .pwrite_recv_fn = streams_xattr_pwrite_recv,
1339         .unlink_fn = streams_xattr_unlink,
1340         .rename_fn = streams_xattr_rename,
1341         .ftruncate_fn = streams_xattr_ftruncate,
1342         .fallocate_fn = streams_xattr_fallocate,
1343         .streaminfo_fn = streams_xattr_streaminfo,
1344 };
1345
1346 NTSTATUS vfs_streams_xattr_init(TALLOC_CTX *);
1347 NTSTATUS vfs_streams_xattr_init(TALLOC_CTX *ctx)
1348 {
1349         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "streams_xattr",
1350                                 &vfs_streams_xattr_fns);
1351 }