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 "smbd/smbd.h"
26 #include "system/filesys.h"
27 #include "../lib/crypto/md5.h"
30 #define DBGC_CLASS DBGC_VFS
37 vfs_handle_struct *handle;
40 static SMB_INO_T stream_inode(const SMB_STRUCT_STAT *sbuf, const char *sname)
42 struct MD5Context ctx;
43 unsigned char hash[16];
47 DEBUG(10, ("stream_inode called for %lu/%lu [%s]\n",
48 (unsigned long)sbuf->st_ex_dev,
49 (unsigned long)sbuf->st_ex_ino, sname));
51 upper_sname = talloc_strdup_upper(talloc_tos(), sname);
52 SMB_ASSERT(upper_sname != NULL);
55 MD5Update(&ctx, (const unsigned char *)&(sbuf->st_ex_dev),
56 sizeof(sbuf->st_ex_dev));
57 MD5Update(&ctx, (const unsigned char *)&(sbuf->st_ex_ino),
58 sizeof(sbuf->st_ex_ino));
59 MD5Update(&ctx, (unsigned char *)upper_sname,
60 talloc_get_size(upper_sname)-1);
63 TALLOC_FREE(upper_sname);
65 /* Hopefully all the variation is in the lower 4 (or 8) bytes! */
66 memcpy(&result, hash, sizeof(result));
68 DEBUG(10, ("stream_inode returns %lu\n", (unsigned long)result));
73 static ssize_t get_xattr_size(connection_struct *conn,
76 const char *xattr_name)
82 status = get_ea_value(talloc_tos(), conn, fsp, fname,
85 if (!NT_STATUS_IS_OK(status)) {
89 result = ea.value.length-1;
90 TALLOC_FREE(ea.value.data);
95 * Given a stream name, populate xattr_name with the xattr name to use for
96 * accessing the stream.
98 static NTSTATUS streams_xattr_get_name(TALLOC_CTX *ctx,
99 const char *stream_name,
104 stype = strchr_m(stream_name + 1, ':');
106 *xattr_name = talloc_asprintf(ctx, "%s%s",
107 SAMBA_XATTR_DOSSTREAM_PREFIX,
109 if (*xattr_name == NULL) {
110 return NT_STATUS_NO_MEMORY;
114 /* Append an explicit stream type if one wasn't specified. */
115 *xattr_name = talloc_asprintf(ctx, "%s:$DATA",
117 if (*xattr_name == NULL) {
118 return NT_STATUS_NO_MEMORY;
121 /* Normalize the stream type to upercase. */
122 if (!strupper_m(strrchr_m(*xattr_name, ':') + 1)) {
123 return NT_STATUS_INVALID_PARAMETER;
127 DEBUG(10, ("xattr_name: %s, stream_name: %s\n", *xattr_name,
133 static bool streams_xattr_recheck(struct stream_io *sio)
136 char *xattr_name = NULL;
138 if (sio->fsp->fsp_name == sio->fsp_name_ptr) {
142 if (sio->fsp->fsp_name->stream_name == NULL) {
143 /* how can this happen */
148 status = streams_xattr_get_name(talloc_tos(),
149 sio->fsp->fsp_name->stream_name,
151 if (!NT_STATUS_IS_OK(status)) {
155 TALLOC_FREE(sio->xattr_name);
156 TALLOC_FREE(sio->base);
157 sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio->handle, sio->fsp),
159 sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio->handle, sio->fsp),
160 sio->fsp->fsp_name->base_name);
161 sio->fsp_name_ptr = sio->fsp->fsp_name;
163 TALLOC_FREE(xattr_name);
165 if ((sio->xattr_name == NULL) || (sio->base == NULL)) {
173 * Helper to stat/lstat the base file of an smb_fname.
175 static int streams_xattr_stat_base(vfs_handle_struct *handle,
176 struct smb_filename *smb_fname,
179 char *tmp_stream_name;
182 tmp_stream_name = smb_fname->stream_name;
183 smb_fname->stream_name = NULL;
185 result = SMB_VFS_NEXT_STAT(handle, smb_fname);
187 result = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
189 smb_fname->stream_name = tmp_stream_name;
193 static int streams_xattr_fstat(vfs_handle_struct *handle, files_struct *fsp,
194 SMB_STRUCT_STAT *sbuf)
196 struct smb_filename *smb_fname_base = NULL;
198 struct stream_io *io = (struct stream_io *)
199 VFS_FETCH_FSP_EXTENSION(handle, fsp);
201 DEBUG(10, ("streams_xattr_fstat called for %d\n", fsp->fh->fd));
203 if (io == NULL || fsp->base_fsp == NULL) {
204 return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
207 if (!streams_xattr_recheck(io)) {
211 /* Create an smb_filename with stream_name == NULL. */
212 smb_fname_base = synthetic_smb_fname(talloc_tos(), io->base,
214 if (smb_fname_base == NULL) {
219 if (lp_posix_pathnames()) {
220 ret = SMB_VFS_LSTAT(handle->conn, smb_fname_base);
222 ret = SMB_VFS_STAT(handle->conn, smb_fname_base);
224 *sbuf = smb_fname_base->st;
225 TALLOC_FREE(smb_fname_base);
231 sbuf->st_ex_size = get_xattr_size(handle->conn, fsp->base_fsp,
232 io->base, io->xattr_name);
233 if (sbuf->st_ex_size == -1) {
237 DEBUG(10, ("sbuf->st_ex_size = %d\n", (int)sbuf->st_ex_size));
239 sbuf->st_ex_ino = stream_inode(sbuf, io->xattr_name);
240 sbuf->st_ex_mode &= ~S_IFMT;
241 sbuf->st_ex_mode |= S_IFREG;
242 sbuf->st_ex_blocks = sbuf->st_ex_size / STAT_ST_BLOCKSIZE + 1;
247 static int streams_xattr_stat(vfs_handle_struct *handle,
248 struct smb_filename *smb_fname)
252 char *xattr_name = NULL;
254 if (!is_ntfs_stream_smb_fname(smb_fname)) {
255 return SMB_VFS_NEXT_STAT(handle, smb_fname);
258 /* Note if lp_posix_paths() is true, we can never
259 * get here as is_ntfs_stream_smb_fname() is
260 * always false. So we never need worry about
261 * not following links here. */
263 /* If the default stream is requested, just stat the base file. */
264 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
265 return streams_xattr_stat_base(handle, smb_fname, true);
268 /* Populate the stat struct with info from the base file. */
269 if (streams_xattr_stat_base(handle, smb_fname, true) == -1) {
273 /* Derive the xattr name to lookup. */
274 status = streams_xattr_get_name(talloc_tos(), smb_fname->stream_name,
276 if (!NT_STATUS_IS_OK(status)) {
277 errno = map_errno_from_nt_status(status);
281 /* Augment the base file's stat information before returning. */
282 smb_fname->st.st_ex_size = get_xattr_size(handle->conn, NULL,
283 smb_fname->base_name,
285 if (smb_fname->st.st_ex_size == -1) {
291 smb_fname->st.st_ex_ino = stream_inode(&smb_fname->st, xattr_name);
292 smb_fname->st.st_ex_mode &= ~S_IFMT;
293 smb_fname->st.st_ex_mode |= S_IFREG;
294 smb_fname->st.st_ex_blocks =
295 smb_fname->st.st_ex_size / STAT_ST_BLOCKSIZE + 1;
299 TALLOC_FREE(xattr_name);
303 static int streams_xattr_lstat(vfs_handle_struct *handle,
304 struct smb_filename *smb_fname)
308 char *xattr_name = NULL;
310 if (!is_ntfs_stream_smb_fname(smb_fname)) {
311 return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
314 /* If the default stream is requested, just stat the base file. */
315 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
316 return streams_xattr_stat_base(handle, smb_fname, false);
319 /* Populate the stat struct with info from the base file. */
320 if (streams_xattr_stat_base(handle, smb_fname, false) == -1) {
324 /* Derive the xattr name to lookup. */
325 status = streams_xattr_get_name(talloc_tos(), smb_fname->stream_name,
327 if (!NT_STATUS_IS_OK(status)) {
328 errno = map_errno_from_nt_status(status);
332 /* Augment the base file's stat information before returning. */
333 smb_fname->st.st_ex_size = get_xattr_size(handle->conn, NULL,
334 smb_fname->base_name,
336 if (smb_fname->st.st_ex_size == -1) {
342 smb_fname->st.st_ex_ino = stream_inode(&smb_fname->st, xattr_name);
343 smb_fname->st.st_ex_mode &= ~S_IFMT;
344 smb_fname->st.st_ex_mode |= S_IFREG;
345 smb_fname->st.st_ex_blocks =
346 smb_fname->st.st_ex_size / STAT_ST_BLOCKSIZE + 1;
351 TALLOC_FREE(xattr_name);
355 static int streams_xattr_open(vfs_handle_struct *handle,
356 struct smb_filename *smb_fname,
357 files_struct *fsp, int flags, mode_t mode)
360 struct smb_filename *smb_fname_base = NULL;
361 struct stream_io *sio;
363 char *xattr_name = NULL;
367 DEBUG(10, ("streams_xattr_open called for %s with flags 0x%x\n",
368 smb_fname_str_dbg(smb_fname), flags));
370 if (!is_ntfs_stream_smb_fname(smb_fname)) {
371 return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
374 /* If the default stream is requested, just open the base file. */
375 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
376 char *tmp_stream_name;
379 tmp_stream_name = smb_fname->stream_name;
380 smb_fname->stream_name = NULL;
382 ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
384 smb_fname->stream_name = tmp_stream_name;
389 status = streams_xattr_get_name(talloc_tos(), smb_fname->stream_name,
391 if (!NT_STATUS_IS_OK(status)) {
392 errno = map_errno_from_nt_status(status);
396 /* Create an smb_filename with stream_name == NULL. */
397 smb_fname_base = synthetic_smb_fname(
398 talloc_tos(), smb_fname->base_name, NULL, NULL);
399 if (smb_fname_base == NULL) {
405 * We use baseflags to turn off nasty side-effects when opening the
409 baseflags &= ~O_TRUNC;
410 baseflags &= ~O_EXCL;
411 baseflags &= ~O_CREAT;
413 hostfd = SMB_VFS_OPEN(handle->conn, smb_fname_base, fsp,
416 TALLOC_FREE(smb_fname_base);
418 /* It is legit to open a stream on a directory, but the base
419 * fd has to be read-only.
421 if ((hostfd == -1) && (errno == EISDIR)) {
422 baseflags &= ~O_ACCMODE;
423 baseflags |= O_RDONLY;
424 hostfd = SMB_VFS_OPEN(handle->conn, smb_fname, fsp, baseflags,
432 status = get_ea_value(talloc_tos(), handle->conn, NULL,
433 smb_fname->base_name, xattr_name, &ea);
435 DEBUG(10, ("get_ea_value returned %s\n", nt_errstr(status)));
437 if (!NT_STATUS_IS_OK(status)
438 && !NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
440 * The base file is not there. This is an error even if we got
441 * O_CREAT, the higher levels should have created the base
444 DEBUG(10, ("streams_xattr_open: base file %s not around, "
445 "returning ENOENT\n", smb_fname->base_name));
450 if ((!NT_STATUS_IS_OK(status) && (flags & O_CREAT)) ||
453 * The attribute does not exist or needs to be truncated
457 * Darn, xattrs need at least 1 byte
461 DEBUG(10, ("creating or truncating attribute %s on file %s\n",
462 xattr_name, smb_fname->base_name));
464 if (fsp->base_fsp->fh->fd != -1) {
465 if (SMB_VFS_FSETXATTR(
466 fsp->base_fsp, xattr_name,
468 flags & O_EXCL ? XATTR_CREATE : 0) == -1) {
472 if (SMB_VFS_SETXATTR(
473 handle->conn, smb_fname->base_name,
474 xattr_name, &null, sizeof(null),
475 flags & O_EXCL ? XATTR_CREATE : 0) == -1) {
481 sio = (struct stream_io *)VFS_ADD_FSP_EXTENSION(handle, fsp,
489 sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
491 sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
492 smb_fname->base_name);
493 sio->fsp_name_ptr = fsp->fsp_name;
494 sio->handle = handle;
497 if ((sio->xattr_name == NULL) || (sio->base == NULL)) {
507 * BUGBUGBUG -- we would need to call fd_close_posix here, but
508 * we don't have a full fsp yet
510 fsp->fh->fd = hostfd;
517 static int streams_xattr_unlink(vfs_handle_struct *handle,
518 const struct smb_filename *smb_fname)
524 if (!is_ntfs_stream_smb_fname(smb_fname)) {
525 return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
528 /* If the default stream is requested, just open the base file. */
529 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
530 struct smb_filename *smb_fname_base = NULL;
532 smb_fname_base = cp_smb_filename(talloc_tos(), smb_fname);
533 if (smb_fname_base == NULL) {
538 ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_base);
540 TALLOC_FREE(smb_fname_base);
544 status = streams_xattr_get_name(talloc_tos(), smb_fname->stream_name,
546 if (!NT_STATUS_IS_OK(status)) {
547 errno = map_errno_from_nt_status(status);
551 ret = SMB_VFS_REMOVEXATTR(handle->conn, smb_fname->base_name, xattr_name);
553 if ((ret == -1) && (errno == ENOATTR)) {
561 TALLOC_FREE(xattr_name);
565 static int streams_xattr_rename(vfs_handle_struct *handle,
566 const struct smb_filename *smb_fname_src,
567 const struct smb_filename *smb_fname_dst)
571 char *src_xattr_name = NULL;
572 char *dst_xattr_name = NULL;
573 bool src_is_stream, dst_is_stream;
578 src_is_stream = is_ntfs_stream_smb_fname(smb_fname_src);
579 dst_is_stream = is_ntfs_stream_smb_fname(smb_fname_dst);
581 if (!src_is_stream && !dst_is_stream) {
582 return SMB_VFS_NEXT_RENAME(handle, smb_fname_src,
586 /* For now don't allow renames from or to the default stream. */
587 if (is_ntfs_default_stream_smb_fname(smb_fname_src) ||
588 is_ntfs_default_stream_smb_fname(smb_fname_dst)) {
593 /* Don't rename if the streams are identical. */
594 if (strcasecmp_m(smb_fname_src->stream_name,
595 smb_fname_dst->stream_name) == 0) {
599 /* Get the xattr names. */
600 status = streams_xattr_get_name(talloc_tos(),
601 smb_fname_src->stream_name,
603 if (!NT_STATUS_IS_OK(status)) {
604 errno = map_errno_from_nt_status(status);
607 status = streams_xattr_get_name(talloc_tos(),
608 smb_fname_dst->stream_name,
610 if (!NT_STATUS_IS_OK(status)) {
611 errno = map_errno_from_nt_status(status);
615 /* read the old stream */
616 status = get_ea_value(talloc_tos(), handle->conn, NULL,
617 smb_fname_src->base_name, src_xattr_name, &ea);
618 if (!NT_STATUS_IS_OK(status)) {
623 /* (over)write the new stream */
624 nret = SMB_VFS_SETXATTR(handle->conn, smb_fname_src->base_name,
625 dst_xattr_name, ea.value.data, ea.value.length,
628 if (errno == ENOATTR) {
634 /* remove the old stream */
635 oret = SMB_VFS_REMOVEXATTR(handle->conn, smb_fname_src->base_name,
638 if (errno == ENOATTR) {
648 TALLOC_FREE(src_xattr_name);
649 TALLOC_FREE(dst_xattr_name);
653 static NTSTATUS walk_xattr_streams(connection_struct *conn, files_struct *fsp,
655 bool (*fn)(struct ea_struct *ea,
662 size_t prefix_len = strlen(SAMBA_XATTR_DOSSTREAM_PREFIX);
664 status = get_ea_names_from_file(talloc_tos(), conn, fsp, fname,
666 if (!NT_STATUS_IS_OK(status)) {
670 for (i=0; i<num_names; i++) {
673 if (strncmp(names[i], SAMBA_XATTR_DOSSTREAM_PREFIX,
678 status = get_ea_value(names, conn, fsp, fname, names[i], &ea);
679 if (!NT_STATUS_IS_OK(status)) {
680 DEBUG(10, ("Could not get ea %s for file %s: %s\n",
681 names[i], fname, nt_errstr(status)));
685 ea.name = talloc_asprintf(ea.value.data, ":%s",
686 names[i] + prefix_len);
687 if (ea.name == NULL) {
688 DEBUG(0, ("talloc failed\n"));
692 if (!fn(&ea, private_data)) {
693 TALLOC_FREE(ea.value.data);
697 TALLOC_FREE(ea.value.data);
704 static bool add_one_stream(TALLOC_CTX *mem_ctx, unsigned int *num_streams,
705 struct stream_struct **streams,
706 const char *name, off_t size,
709 struct stream_struct *tmp;
711 tmp = talloc_realloc(mem_ctx, *streams, struct stream_struct,
717 tmp[*num_streams].name = talloc_strdup(tmp, name);
718 if (tmp[*num_streams].name == NULL) {
722 tmp[*num_streams].size = size;
723 tmp[*num_streams].alloc_size = alloc_size;
730 struct streaminfo_state {
732 vfs_handle_struct *handle;
733 unsigned int num_streams;
734 struct stream_struct *streams;
738 static bool collect_one_stream(struct ea_struct *ea, void *private_data)
740 struct streaminfo_state *state =
741 (struct streaminfo_state *)private_data;
743 if (!add_one_stream(state->mem_ctx,
744 &state->num_streams, &state->streams,
745 ea->name, ea->value.length-1,
746 smb_roundup(state->handle->conn,
747 ea->value.length-1))) {
748 state->status = NT_STATUS_NO_MEMORY;
755 static NTSTATUS streams_xattr_streaminfo(vfs_handle_struct *handle,
756 struct files_struct *fsp,
759 unsigned int *pnum_streams,
760 struct stream_struct **pstreams)
762 SMB_STRUCT_STAT sbuf;
765 struct streaminfo_state state;
767 if ((fsp != NULL) && (fsp->fh->fd != -1)) {
768 ret = SMB_VFS_FSTAT(fsp, &sbuf);
771 struct smb_filename *smb_fname = NULL;
772 smb_fname = synthetic_smb_fname(talloc_tos(), fname, NULL,
774 if (smb_fname == NULL) {
775 return NT_STATUS_NO_MEMORY;
777 if (lp_posix_pathnames()) {
778 ret = SMB_VFS_LSTAT(handle->conn, smb_fname);
780 ret = SMB_VFS_STAT(handle->conn, smb_fname);
782 sbuf = smb_fname->st;
783 TALLOC_FREE(smb_fname);
787 return map_nt_error_from_unix(errno);
790 state.streams = *pstreams;
791 state.num_streams = *pnum_streams;
792 state.mem_ctx = mem_ctx;
793 state.handle = handle;
794 state.status = NT_STATUS_OK;
796 status = walk_xattr_streams(handle->conn, fsp, fname,
797 collect_one_stream, &state);
799 if (!NT_STATUS_IS_OK(status)) {
800 TALLOC_FREE(state.streams);
804 if (!NT_STATUS_IS_OK(state.status)) {
805 TALLOC_FREE(state.streams);
809 *pnum_streams = state.num_streams;
810 *pstreams = state.streams;
812 return SMB_VFS_NEXT_STREAMINFO(handle, fsp, fname, mem_ctx, pnum_streams, pstreams);
815 static uint32_t streams_xattr_fs_capabilities(struct vfs_handle_struct *handle,
816 enum timestamp_set_resolution *p_ts_res)
818 return SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res) | FILE_NAMED_STREAMS;
821 static ssize_t streams_xattr_pwrite(vfs_handle_struct *handle,
822 files_struct *fsp, const void *data,
823 size_t n, off_t offset)
825 struct stream_io *sio =
826 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
831 DEBUG(10, ("streams_xattr_pwrite called for %d bytes\n", (int)n));
834 return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
837 if (!streams_xattr_recheck(sio)) {
841 status = get_ea_value(talloc_tos(), handle->conn, fsp->base_fsp,
842 sio->base, sio->xattr_name, &ea);
843 if (!NT_STATUS_IS_OK(status)) {
847 if ((offset + n) > ea.value.length-1) {
850 tmp = talloc_realloc(talloc_tos(), ea.value.data, uint8,
854 TALLOC_FREE(ea.value.data);
859 ea.value.length = offset + n + 1;
860 ea.value.data[offset+n] = 0;
863 memcpy(ea.value.data + offset, data, n);
865 if (fsp->base_fsp->fh->fd != -1) {
866 ret = SMB_VFS_FSETXATTR(fsp->base_fsp,
868 ea.value.data, ea.value.length, 0);
870 ret = SMB_VFS_SETXATTR(fsp->conn,
871 fsp->base_fsp->fsp_name->base_name,
873 ea.value.data, ea.value.length, 0);
875 TALLOC_FREE(ea.value.data);
884 static ssize_t streams_xattr_pread(vfs_handle_struct *handle,
885 files_struct *fsp, void *data,
886 size_t n, off_t offset)
888 struct stream_io *sio =
889 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
892 size_t length, overlap;
894 DEBUG(10, ("streams_xattr_pread: offset=%d, size=%d\n",
895 (int)offset, (int)n));
898 return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
901 if (!streams_xattr_recheck(sio)) {
905 status = get_ea_value(talloc_tos(), handle->conn, fsp->base_fsp,
906 sio->base, sio->xattr_name, &ea);
907 if (!NT_STATUS_IS_OK(status)) {
911 length = ea.value.length-1;
913 DEBUG(10, ("streams_xattr_pread: get_ea_value returned %d bytes\n",
916 /* Attempt to read past EOF. */
917 if (length <= offset) {
921 overlap = (offset + n) > length ? (length - offset) : n;
922 memcpy(data, ea.value.data + offset, overlap);
924 TALLOC_FREE(ea.value.data);
928 static int streams_xattr_ftruncate(struct vfs_handle_struct *handle,
929 struct files_struct *fsp,
936 struct stream_io *sio =
937 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
939 DEBUG(10, ("streams_xattr_ftruncate called for file %s offset %.0f\n",
940 fsp_str_dbg(fsp), (double)offset));
943 return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
946 if (!streams_xattr_recheck(sio)) {
950 status = get_ea_value(talloc_tos(), handle->conn, fsp->base_fsp,
951 sio->base, sio->xattr_name, &ea);
952 if (!NT_STATUS_IS_OK(status)) {
956 tmp = talloc_realloc(talloc_tos(), ea.value.data, uint8,
960 TALLOC_FREE(ea.value.data);
965 /* Did we expand ? */
966 if (ea.value.length < offset + 1) {
967 memset(&tmp[ea.value.length], '\0',
968 offset + 1 - ea.value.length);
972 ea.value.length = offset + 1;
973 ea.value.data[offset] = 0;
975 if (fsp->base_fsp->fh->fd != -1) {
976 ret = SMB_VFS_FSETXATTR(fsp->base_fsp,
978 ea.value.data, ea.value.length, 0);
980 ret = SMB_VFS_SETXATTR(fsp->conn,
981 fsp->base_fsp->fsp_name->base_name,
983 ea.value.data, ea.value.length, 0);
986 TALLOC_FREE(ea.value.data);
995 static int streams_xattr_fallocate(struct vfs_handle_struct *handle,
996 struct files_struct *fsp,
997 enum vfs_fallocate_mode mode,
1001 struct stream_io *sio =
1002 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1004 DEBUG(10, ("streams_xattr_fallocate called for file %s offset %.0f"
1006 fsp_str_dbg(fsp), (double)offset, (double)len));
1009 return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
1012 if (!streams_xattr_recheck(sio)) {
1016 /* Let the pwrite code path handle it. */
1021 static struct vfs_fn_pointers vfs_streams_xattr_fns = {
1022 .fs_capabilities_fn = streams_xattr_fs_capabilities,
1023 .open_fn = streams_xattr_open,
1024 .stat_fn = streams_xattr_stat,
1025 .fstat_fn = streams_xattr_fstat,
1026 .lstat_fn = streams_xattr_lstat,
1027 .pread_fn = streams_xattr_pread,
1028 .pwrite_fn = streams_xattr_pwrite,
1029 .unlink_fn = streams_xattr_unlink,
1030 .rename_fn = streams_xattr_rename,
1031 .ftruncate_fn = streams_xattr_ftruncate,
1032 .fallocate_fn = streams_xattr_fallocate,
1033 .streaminfo_fn = streams_xattr_streaminfo,
1036 NTSTATUS vfs_streams_xattr_init(void);
1037 NTSTATUS vfs_streams_xattr_init(void)
1039 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "streams_xattr",
1040 &vfs_streams_xattr_fns);