2 * Store streams in xattrs
4 * Copyright (C) Volker Lendecke, 2008
6 * Partly based on James Peach's Darwin module, which is
8 * Copyright (C) James Peach 2006-2007
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.
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.
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/>.
25 #include "../lib/crypto/md5.h"
28 #define DBGC_CLASS DBGC_VFS
35 vfs_handle_struct *handle;
38 static SMB_INO_T stream_inode(const SMB_STRUCT_STAT *sbuf, const char *sname)
40 struct MD5Context ctx;
41 unsigned char hash[16];
45 DEBUG(10, ("stream_inode called for %lu/%lu [%s]\n",
46 (unsigned long)sbuf->st_ex_dev,
47 (unsigned long)sbuf->st_ex_ino, sname));
49 upper_sname = talloc_strdup_upper(talloc_tos(), sname);
50 SMB_ASSERT(upper_sname != NULL);
53 MD5Update(&ctx, (unsigned char *)&(sbuf->st_ex_dev),
54 sizeof(sbuf->st_ex_dev));
55 MD5Update(&ctx, (unsigned char *)&(sbuf->st_ex_ino),
56 sizeof(sbuf->st_ex_ino));
57 MD5Update(&ctx, (unsigned char *)upper_sname,
58 talloc_get_size(upper_sname)-1);
61 TALLOC_FREE(upper_sname);
63 /* Hopefully all the variation is in the lower 4 (or 8) bytes! */
64 memcpy(&result, hash, sizeof(result));
66 DEBUG(10, ("stream_inode returns %lu\n", (unsigned long)result));
71 static ssize_t get_xattr_size(connection_struct *conn,
74 const char *xattr_name)
80 status = get_ea_value(talloc_tos(), conn, fsp, fname,
83 if (!NT_STATUS_IS_OK(status)) {
87 result = ea.value.length-1;
88 TALLOC_FREE(ea.value.data);
93 * Given a stream name, populate xattr_name with the xattr name to use for
94 * accessing the stream.
96 static NTSTATUS streams_xattr_get_name(TALLOC_CTX *ctx,
97 const char *stream_name,
102 stype = strchr_m(stream_name + 1, ':');
104 *xattr_name = talloc_asprintf(ctx, "%s%s",
105 SAMBA_XATTR_DOSSTREAM_PREFIX,
107 if (*xattr_name == NULL) {
108 return NT_STATUS_NO_MEMORY;
112 /* Append an explicit stream type if one wasn't specified. */
113 *xattr_name = talloc_asprintf(ctx, "%s:$DATA",
115 if (*xattr_name == NULL) {
116 return NT_STATUS_NO_MEMORY;
119 /* Normalize the stream type to upercase. */
120 strupper_m(strrchr_m(*xattr_name, ':') + 1);
123 DEBUG(10, ("xattr_name: %s, stream_name: %s\n", *xattr_name,
129 static bool streams_xattr_recheck(struct stream_io *sio)
132 char *xattr_name = NULL;
134 if (sio->fsp->fsp_name == sio->fsp_name_ptr) {
138 if (sio->fsp->fsp_name->stream_name == NULL) {
139 /* how can this happen */
144 status = streams_xattr_get_name(talloc_tos(),
145 sio->fsp->fsp_name->stream_name,
147 if (!NT_STATUS_IS_OK(status)) {
151 TALLOC_FREE(sio->xattr_name);
152 TALLOC_FREE(sio->base);
153 sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio->handle, sio->fsp),
155 sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio->handle, sio->fsp),
156 sio->fsp->fsp_name->base_name);
157 sio->fsp_name_ptr = sio->fsp->fsp_name;
159 TALLOC_FREE(xattr_name);
161 if ((sio->xattr_name == NULL) || (sio->base == NULL)) {
169 * Helper to stat/lstat the base file of an smb_fname.
171 static int streams_xattr_stat_base(vfs_handle_struct *handle,
172 struct smb_filename *smb_fname,
175 char *tmp_stream_name;
178 tmp_stream_name = smb_fname->stream_name;
179 smb_fname->stream_name = NULL;
181 result = SMB_VFS_NEXT_STAT(handle, smb_fname);
183 result = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
185 smb_fname->stream_name = tmp_stream_name;
189 static int streams_xattr_fstat(vfs_handle_struct *handle, files_struct *fsp,
190 SMB_STRUCT_STAT *sbuf)
192 struct smb_filename *smb_fname_base = NULL;
195 struct stream_io *io = (struct stream_io *)
196 VFS_FETCH_FSP_EXTENSION(handle, fsp);
198 DEBUG(10, ("streams_xattr_fstat called for %d\n", fsp->fh->fd));
200 if (io == NULL || fsp->base_fsp == NULL) {
201 return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
204 if (!streams_xattr_recheck(io)) {
208 /* Create an smb_filename with stream_name == NULL. */
209 status = create_synthetic_smb_fname(talloc_tos(),
213 if (!NT_STATUS_IS_OK(status)) {
214 errno = map_errno_from_nt_status(status);
218 if (lp_posix_pathnames()) {
219 ret = SMB_VFS_LSTAT(handle->conn, smb_fname_base);
221 ret = SMB_VFS_STAT(handle->conn, smb_fname_base);
223 *sbuf = smb_fname_base->st;
224 TALLOC_FREE(smb_fname_base);
230 sbuf->st_ex_size = get_xattr_size(handle->conn, fsp->base_fsp,
231 io->base, io->xattr_name);
232 if (sbuf->st_ex_size == -1) {
236 DEBUG(10, ("sbuf->st_ex_size = %d\n", (int)sbuf->st_ex_size));
238 sbuf->st_ex_ino = stream_inode(sbuf, io->xattr_name);
239 sbuf->st_ex_mode &= ~S_IFMT;
240 sbuf->st_ex_mode |= S_IFREG;
241 sbuf->st_ex_blocks = sbuf->st_ex_size / STAT_ST_BLOCKSIZE + 1;
246 static int streams_xattr_stat(vfs_handle_struct *handle,
247 struct smb_filename *smb_fname)
251 char *xattr_name = NULL;
253 if (!is_ntfs_stream_smb_fname(smb_fname)) {
254 return SMB_VFS_NEXT_STAT(handle, smb_fname);
257 /* Note if lp_posix_paths() is true, we can never
258 * get here as is_ntfs_stream_smb_fname() is
259 * always false. So we never need worry about
260 * not following links here. */
262 /* If the default stream is requested, just stat the base file. */
263 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
264 return streams_xattr_stat_base(handle, smb_fname, true);
267 /* Populate the stat struct with info from the base file. */
268 if (streams_xattr_stat_base(handle, smb_fname, true) == -1) {
272 /* Derive the xattr name to lookup. */
273 status = streams_xattr_get_name(talloc_tos(), smb_fname->stream_name,
275 if (!NT_STATUS_IS_OK(status)) {
276 errno = map_errno_from_nt_status(status);
280 /* Augment the base file's stat information before returning. */
281 smb_fname->st.st_ex_size = get_xattr_size(handle->conn, NULL,
282 smb_fname->base_name,
284 if (smb_fname->st.st_ex_size == -1) {
290 smb_fname->st.st_ex_ino = stream_inode(&smb_fname->st, xattr_name);
291 smb_fname->st.st_ex_mode &= ~S_IFMT;
292 smb_fname->st.st_ex_mode |= S_IFREG;
293 smb_fname->st.st_ex_blocks =
294 smb_fname->st.st_ex_size / STAT_ST_BLOCKSIZE + 1;
298 TALLOC_FREE(xattr_name);
302 static int streams_xattr_lstat(vfs_handle_struct *handle,
303 struct smb_filename *smb_fname)
307 char *xattr_name = NULL;
309 if (!is_ntfs_stream_smb_fname(smb_fname)) {
310 return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
313 /* If the default stream is requested, just stat the base file. */
314 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
315 return streams_xattr_stat_base(handle, smb_fname, false);
318 /* Populate the stat struct with info from the base file. */
319 if (streams_xattr_stat_base(handle, smb_fname, false) == -1) {
323 /* Derive the xattr name to lookup. */
324 status = streams_xattr_get_name(talloc_tos(), smb_fname->stream_name,
326 if (!NT_STATUS_IS_OK(status)) {
327 errno = map_errno_from_nt_status(status);
331 /* Augment the base file's stat information before returning. */
332 smb_fname->st.st_ex_size = get_xattr_size(handle->conn, NULL,
333 smb_fname->base_name,
335 if (smb_fname->st.st_ex_size == -1) {
341 smb_fname->st.st_ex_ino = stream_inode(&smb_fname->st, xattr_name);
342 smb_fname->st.st_ex_mode &= ~S_IFMT;
343 smb_fname->st.st_ex_mode |= S_IFREG;
344 smb_fname->st.st_ex_blocks =
345 smb_fname->st.st_ex_size / STAT_ST_BLOCKSIZE + 1;
350 TALLOC_FREE(xattr_name);
354 static int streams_xattr_open(vfs_handle_struct *handle,
355 struct smb_filename *smb_fname,
356 files_struct *fsp, int flags, mode_t mode)
359 struct smb_filename *smb_fname_base = NULL;
360 struct stream_io *sio;
362 char *xattr_name = NULL;
366 DEBUG(10, ("streams_xattr_open called for %s\n",
367 smb_fname_str_dbg(smb_fname)));
369 if (!is_ntfs_stream_smb_fname(smb_fname)) {
370 return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
373 /* If the default stream is requested, just open the base file. */
374 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
375 char *tmp_stream_name;
378 tmp_stream_name = smb_fname->stream_name;
379 smb_fname->stream_name = NULL;
381 ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
383 smb_fname->stream_name = tmp_stream_name;
388 status = streams_xattr_get_name(talloc_tos(), smb_fname->stream_name,
390 if (!NT_STATUS_IS_OK(status)) {
391 errno = map_errno_from_nt_status(status);
395 /* Create an smb_filename with stream_name == NULL. */
396 status = create_synthetic_smb_fname(talloc_tos(),
397 smb_fname->base_name,
400 if (!NT_STATUS_IS_OK(status)) {
401 errno = map_errno_from_nt_status(status);
406 * We use baseflags to turn off nasty side-effects when opening the
410 baseflags &= ~O_TRUNC;
411 baseflags &= ~O_EXCL;
412 baseflags &= ~O_CREAT;
414 hostfd = SMB_VFS_OPEN(handle->conn, smb_fname_base, fsp,
417 TALLOC_FREE(smb_fname_base);
419 /* It is legit to open a stream on a directory, but the base
420 * fd has to be read-only.
422 if ((hostfd == -1) && (errno == EISDIR)) {
423 baseflags &= ~O_ACCMODE;
424 baseflags |= O_RDONLY;
425 hostfd = SMB_VFS_OPEN(handle->conn, smb_fname, fsp, baseflags,
433 status = get_ea_value(talloc_tos(), handle->conn, NULL,
434 smb_fname->base_name, xattr_name, &ea);
436 DEBUG(10, ("get_ea_value returned %s\n", nt_errstr(status)));
438 if (!NT_STATUS_IS_OK(status)
439 && !NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
441 * The base file is not there. This is an error even if we got
442 * O_CREAT, the higher levels should have created the base
445 DEBUG(10, ("streams_xattr_open: base file %s not around, "
446 "returning ENOENT\n", smb_fname->base_name));
451 if (!NT_STATUS_IS_OK(status)) {
453 * The attribute does not exist
456 if (flags & O_CREAT) {
458 * Darn, xattrs need at least 1 byte
462 DEBUG(10, ("creating attribute %s on file %s\n",
463 xattr_name, smb_fname->base_name));
465 if (fsp->base_fsp->fh->fd != -1) {
466 if (SMB_VFS_FSETXATTR(
467 fsp->base_fsp, xattr_name,
469 flags & O_EXCL ? XATTR_CREATE : 0) == -1) {
473 if (SMB_VFS_SETXATTR(
474 handle->conn, smb_fname->base_name,
475 xattr_name, &null, sizeof(null),
476 flags & O_EXCL ? XATTR_CREATE : 0) == -1) {
483 if (flags & O_TRUNC) {
485 if (fsp->base_fsp->fh->fd != -1) {
486 if (SMB_VFS_FSETXATTR(
487 fsp->base_fsp, xattr_name,
489 flags & O_EXCL ? XATTR_CREATE : 0) == -1) {
493 if (SMB_VFS_SETXATTR(
494 handle->conn, smb_fname->base_name,
495 xattr_name, &null, sizeof(null),
496 flags & O_EXCL ? XATTR_CREATE : 0) == -1) {
502 sio = (struct stream_io *)VFS_ADD_FSP_EXTENSION(handle, fsp,
510 sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
512 sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
513 smb_fname->base_name);
514 sio->fsp_name_ptr = fsp->fsp_name;
515 sio->handle = handle;
518 if ((sio->xattr_name == NULL) || (sio->base == NULL)) {
528 * BUGBUGBUG -- we would need to call fd_close_posix here, but
529 * we don't have a full fsp yet
537 static int streams_xattr_unlink(vfs_handle_struct *handle,
538 const struct smb_filename *smb_fname)
544 if (!is_ntfs_stream_smb_fname(smb_fname)) {
545 return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
548 /* If the default stream is requested, just open the base file. */
549 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
550 struct smb_filename *smb_fname_base = NULL;
552 status = copy_smb_filename(talloc_tos(), smb_fname,
554 if (!NT_STATUS_IS_OK(status)) {
555 errno = map_errno_from_nt_status(status);
559 ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_base);
561 TALLOC_FREE(smb_fname_base);
565 status = streams_xattr_get_name(talloc_tos(), smb_fname->stream_name,
567 if (!NT_STATUS_IS_OK(status)) {
568 errno = map_errno_from_nt_status(status);
572 ret = SMB_VFS_REMOVEXATTR(handle->conn, smb_fname->base_name, xattr_name);
574 if ((ret == -1) && (errno == ENOATTR)) {
582 TALLOC_FREE(xattr_name);
586 static int streams_xattr_rename(vfs_handle_struct *handle,
587 const struct smb_filename *smb_fname_src,
588 const struct smb_filename *smb_fname_dst)
592 char *src_xattr_name = NULL;
593 char *dst_xattr_name = NULL;
594 bool src_is_stream, dst_is_stream;
599 src_is_stream = is_ntfs_stream_smb_fname(smb_fname_src);
600 dst_is_stream = is_ntfs_stream_smb_fname(smb_fname_dst);
602 if (!src_is_stream && !dst_is_stream) {
603 return SMB_VFS_NEXT_RENAME(handle, smb_fname_src,
607 /* For now don't allow renames from or to the default stream. */
608 if (is_ntfs_default_stream_smb_fname(smb_fname_src) ||
609 is_ntfs_default_stream_smb_fname(smb_fname_dst)) {
614 /* Don't rename if the streams are identical. */
615 if (StrCaseCmp(smb_fname_src->stream_name,
616 smb_fname_dst->stream_name) == 0) {
620 /* Get the xattr names. */
621 status = streams_xattr_get_name(talloc_tos(),
622 smb_fname_src->stream_name,
624 if (!NT_STATUS_IS_OK(status)) {
625 errno = map_errno_from_nt_status(status);
628 status = streams_xattr_get_name(talloc_tos(),
629 smb_fname_dst->stream_name,
631 if (!NT_STATUS_IS_OK(status)) {
632 errno = map_errno_from_nt_status(status);
636 /* read the old stream */
637 status = get_ea_value(talloc_tos(), handle->conn, NULL,
638 smb_fname_src->base_name, src_xattr_name, &ea);
639 if (!NT_STATUS_IS_OK(status)) {
644 /* (over)write the new stream */
645 nret = SMB_VFS_SETXATTR(handle->conn, smb_fname_src->base_name,
646 dst_xattr_name, ea.value.data, ea.value.length,
649 if (errno == ENOATTR) {
655 /* remove the old stream */
656 oret = SMB_VFS_REMOVEXATTR(handle->conn, smb_fname_src->base_name,
659 if (errno == ENOATTR) {
669 TALLOC_FREE(src_xattr_name);
670 TALLOC_FREE(dst_xattr_name);
674 static NTSTATUS walk_xattr_streams(connection_struct *conn, files_struct *fsp,
676 bool (*fn)(struct ea_struct *ea,
683 size_t prefix_len = strlen(SAMBA_XATTR_DOSSTREAM_PREFIX);
685 status = get_ea_names_from_file(talloc_tos(), conn, fsp, fname,
687 if (!NT_STATUS_IS_OK(status)) {
691 for (i=0; i<num_names; i++) {
694 if (strncmp(names[i], SAMBA_XATTR_DOSSTREAM_PREFIX,
699 status = get_ea_value(names, conn, fsp, fname, names[i], &ea);
700 if (!NT_STATUS_IS_OK(status)) {
701 DEBUG(10, ("Could not get ea %s for file %s: %s\n",
702 names[i], fname, nt_errstr(status)));
706 ea.name = talloc_asprintf(ea.value.data, ":%s",
707 names[i] + prefix_len);
708 if (ea.name == NULL) {
709 DEBUG(0, ("talloc failed\n"));
713 if (!fn(&ea, private_data)) {
714 TALLOC_FREE(ea.value.data);
718 TALLOC_FREE(ea.value.data);
725 static bool add_one_stream(TALLOC_CTX *mem_ctx, unsigned int *num_streams,
726 struct stream_struct **streams,
727 const char *name, SMB_OFF_T size,
728 SMB_OFF_T alloc_size)
730 struct stream_struct *tmp;
732 tmp = TALLOC_REALLOC_ARRAY(mem_ctx, *streams, struct stream_struct,
738 tmp[*num_streams].name = talloc_strdup(tmp, name);
739 if (tmp[*num_streams].name == NULL) {
743 tmp[*num_streams].size = size;
744 tmp[*num_streams].alloc_size = alloc_size;
751 struct streaminfo_state {
753 vfs_handle_struct *handle;
754 unsigned int num_streams;
755 struct stream_struct *streams;
759 static bool collect_one_stream(struct ea_struct *ea, void *private_data)
761 struct streaminfo_state *state =
762 (struct streaminfo_state *)private_data;
764 if (!add_one_stream(state->mem_ctx,
765 &state->num_streams, &state->streams,
766 ea->name, ea->value.length-1,
767 smb_roundup(state->handle->conn,
768 ea->value.length-1))) {
769 state->status = NT_STATUS_NO_MEMORY;
776 static NTSTATUS streams_xattr_streaminfo(vfs_handle_struct *handle,
777 struct files_struct *fsp,
780 unsigned int *pnum_streams,
781 struct stream_struct **pstreams)
783 SMB_STRUCT_STAT sbuf;
786 struct streaminfo_state state;
788 if ((fsp != NULL) && (fsp->fh->fd != -1)) {
789 ret = SMB_VFS_FSTAT(fsp, &sbuf);
792 struct smb_filename *smb_fname = NULL;
793 status = create_synthetic_smb_fname(talloc_tos(), fname, NULL,
795 if (!NT_STATUS_IS_OK(status)) {
798 if (lp_posix_pathnames()) {
799 ret = SMB_VFS_LSTAT(handle->conn, smb_fname);
801 ret = SMB_VFS_STAT(handle->conn, smb_fname);
803 sbuf = smb_fname->st;
804 TALLOC_FREE(smb_fname);
808 return map_nt_error_from_unix(errno);
811 state.streams = NULL;
812 state.num_streams = 0;
814 if (!S_ISDIR(sbuf.st_ex_mode)) {
815 if (!add_one_stream(mem_ctx,
816 &state.num_streams, &state.streams,
817 "::$DATA", sbuf.st_ex_size,
818 SMB_VFS_GET_ALLOC_SIZE(handle->conn, fsp,
820 return NT_STATUS_NO_MEMORY;
824 state.mem_ctx = mem_ctx;
825 state.handle = handle;
826 state.status = NT_STATUS_OK;
828 status = walk_xattr_streams(handle->conn, fsp, fname,
829 collect_one_stream, &state);
831 if (!NT_STATUS_IS_OK(status)) {
832 TALLOC_FREE(state.streams);
836 if (!NT_STATUS_IS_OK(state.status)) {
837 TALLOC_FREE(state.streams);
841 *pnum_streams = state.num_streams;
842 *pstreams = state.streams;
846 static uint32_t streams_xattr_fs_capabilities(struct vfs_handle_struct *handle,
847 enum timestamp_set_resolution *p_ts_res)
849 return SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res) | FILE_NAMED_STREAMS;
852 static ssize_t streams_xattr_pwrite(vfs_handle_struct *handle,
853 files_struct *fsp, const void *data,
854 size_t n, SMB_OFF_T offset)
856 struct stream_io *sio =
857 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
862 DEBUG(10, ("streams_xattr_pwrite called for %d bytes\n", (int)n));
865 return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
868 if (!streams_xattr_recheck(sio)) {
872 status = get_ea_value(talloc_tos(), handle->conn, fsp->base_fsp,
873 sio->base, sio->xattr_name, &ea);
874 if (!NT_STATUS_IS_OK(status)) {
878 if ((offset + n) > ea.value.length-1) {
881 tmp = TALLOC_REALLOC_ARRAY(talloc_tos(), ea.value.data, uint8,
885 TALLOC_FREE(ea.value.data);
890 ea.value.length = offset + n + 1;
891 ea.value.data[offset+n] = 0;
894 memcpy(ea.value.data + offset, data, n);
896 if (fsp->base_fsp->fh->fd != -1) {
897 ret = SMB_VFS_FSETXATTR(fsp->base_fsp,
899 ea.value.data, ea.value.length, 0);
901 ret = SMB_VFS_SETXATTR(fsp->conn,
902 fsp->base_fsp->fsp_name->base_name,
904 ea.value.data, ea.value.length, 0);
906 TALLOC_FREE(ea.value.data);
915 static ssize_t streams_xattr_pread(vfs_handle_struct *handle,
916 files_struct *fsp, void *data,
917 size_t n, SMB_OFF_T offset)
919 struct stream_io *sio =
920 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
923 size_t length, overlap;
925 DEBUG(10, ("streams_xattr_pread: offset=%d, size=%d\n",
926 (int)offset, (int)n));
929 return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
932 if (!streams_xattr_recheck(sio)) {
936 status = get_ea_value(talloc_tos(), handle->conn, fsp->base_fsp,
937 sio->base, sio->xattr_name, &ea);
938 if (!NT_STATUS_IS_OK(status)) {
942 length = ea.value.length-1;
944 DEBUG(10, ("streams_xattr_pread: get_ea_value returned %d bytes\n",
947 /* Attempt to read past EOF. */
948 if (length <= offset) {
952 overlap = (offset + n) > length ? (length - offset) : n;
953 memcpy(data, ea.value.data + offset, overlap);
955 TALLOC_FREE(ea.value.data);
959 static int streams_xattr_ftruncate(struct vfs_handle_struct *handle,
960 struct files_struct *fsp,
967 struct stream_io *sio =
968 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
970 DEBUG(10, ("streams_xattr_ftruncate called for file %s offset %.0f\n",
971 fsp_str_dbg(fsp), (double)offset));
974 return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
977 if (!streams_xattr_recheck(sio)) {
981 status = get_ea_value(talloc_tos(), handle->conn, fsp->base_fsp,
982 sio->base, sio->xattr_name, &ea);
983 if (!NT_STATUS_IS_OK(status)) {
987 tmp = TALLOC_REALLOC_ARRAY(talloc_tos(), ea.value.data, uint8,
991 TALLOC_FREE(ea.value.data);
996 /* Did we expand ? */
997 if (ea.value.length < offset + 1) {
998 memset(&tmp[ea.value.length], '\0',
999 offset + 1 - ea.value.length);
1002 ea.value.data = tmp;
1003 ea.value.length = offset + 1;
1004 ea.value.data[offset] = 0;
1006 if (fsp->base_fsp->fh->fd != -1) {
1007 ret = SMB_VFS_FSETXATTR(fsp->base_fsp,
1009 ea.value.data, ea.value.length, 0);
1011 ret = SMB_VFS_SETXATTR(fsp->conn,
1012 fsp->base_fsp->fsp_name->base_name,
1014 ea.value.data, ea.value.length, 0);
1017 TALLOC_FREE(ea.value.data);
1026 static int streams_xattr_fallocate(struct vfs_handle_struct *handle,
1027 struct files_struct *fsp,
1028 enum vfs_fallocate_mode mode,
1032 struct stream_io *sio =
1033 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1035 DEBUG(10, ("streams_xattr_fallocate called for file %s offset %.0f"
1037 fsp_str_dbg(fsp), (double)offset, (double)len));
1040 return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
1043 if (!streams_xattr_recheck(sio)) {
1047 /* Let the pwrite code path handle it. */
1052 static struct vfs_fn_pointers vfs_streams_xattr_fns = {
1053 .fs_capabilities = streams_xattr_fs_capabilities,
1054 .open = streams_xattr_open,
1055 .stat = streams_xattr_stat,
1056 .fstat = streams_xattr_fstat,
1057 .lstat = streams_xattr_lstat,
1058 .pread = streams_xattr_pread,
1059 .pwrite = streams_xattr_pwrite,
1060 .unlink = streams_xattr_unlink,
1061 .rename = streams_xattr_rename,
1062 .ftruncate = streams_xattr_ftruncate,
1063 .fallocate = streams_xattr_fallocate,
1064 .streaminfo = streams_xattr_streaminfo,
1067 NTSTATUS vfs_streams_xattr_init(void);
1068 NTSTATUS vfs_streams_xattr_init(void)
1070 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "streams_xattr",
1071 &vfs_streams_xattr_fns);