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 "system/filesys.h"
26 #include "../lib/crypto/md5.h"
29 #define DBGC_CLASS DBGC_VFS
36 vfs_handle_struct *handle;
39 static SMB_INO_T stream_inode(const SMB_STRUCT_STAT *sbuf, const char *sname)
41 struct MD5Context ctx;
42 unsigned char hash[16];
46 DEBUG(10, ("stream_inode called for %lu/%lu [%s]\n",
47 (unsigned long)sbuf->st_ex_dev,
48 (unsigned long)sbuf->st_ex_ino, sname));
50 upper_sname = talloc_strdup_upper(talloc_tos(), sname);
51 SMB_ASSERT(upper_sname != NULL);
54 MD5Update(&ctx, (unsigned char *)&(sbuf->st_ex_dev),
55 sizeof(sbuf->st_ex_dev));
56 MD5Update(&ctx, (unsigned char *)&(sbuf->st_ex_ino),
57 sizeof(sbuf->st_ex_ino));
58 MD5Update(&ctx, (unsigned char *)upper_sname,
59 talloc_get_size(upper_sname)-1);
62 TALLOC_FREE(upper_sname);
64 /* Hopefully all the variation is in the lower 4 (or 8) bytes! */
65 memcpy(&result, hash, sizeof(result));
67 DEBUG(10, ("stream_inode returns %lu\n", (unsigned long)result));
72 static ssize_t get_xattr_size(connection_struct *conn,
75 const char *xattr_name)
81 status = get_ea_value(talloc_tos(), conn, fsp, fname,
84 if (!NT_STATUS_IS_OK(status)) {
88 result = ea.value.length-1;
89 TALLOC_FREE(ea.value.data);
94 * Given a stream name, populate xattr_name with the xattr name to use for
95 * accessing the stream.
97 static NTSTATUS streams_xattr_get_name(TALLOC_CTX *ctx,
98 const char *stream_name,
103 stype = strchr_m(stream_name + 1, ':');
105 *xattr_name = talloc_asprintf(ctx, "%s%s",
106 SAMBA_XATTR_DOSSTREAM_PREFIX,
108 if (*xattr_name == NULL) {
109 return NT_STATUS_NO_MEMORY;
113 /* Append an explicit stream type if one wasn't specified. */
114 *xattr_name = talloc_asprintf(ctx, "%s:$DATA",
116 if (*xattr_name == NULL) {
117 return NT_STATUS_NO_MEMORY;
120 /* Normalize the stream type to upercase. */
121 strupper_m(strrchr_m(*xattr_name, ':') + 1);
124 DEBUG(10, ("xattr_name: %s, stream_name: %s\n", *xattr_name,
130 static bool streams_xattr_recheck(struct stream_io *sio)
133 char *xattr_name = NULL;
135 if (sio->fsp->fsp_name == sio->fsp_name_ptr) {
139 if (sio->fsp->fsp_name->stream_name == NULL) {
140 /* how can this happen */
145 status = streams_xattr_get_name(talloc_tos(),
146 sio->fsp->fsp_name->stream_name,
148 if (!NT_STATUS_IS_OK(status)) {
152 TALLOC_FREE(sio->xattr_name);
153 TALLOC_FREE(sio->base);
154 sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio->handle, sio->fsp),
156 sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio->handle, sio->fsp),
157 sio->fsp->fsp_name->base_name);
158 sio->fsp_name_ptr = sio->fsp->fsp_name;
160 TALLOC_FREE(xattr_name);
162 if ((sio->xattr_name == NULL) || (sio->base == NULL)) {
170 * Helper to stat/lstat the base file of an smb_fname.
172 static int streams_xattr_stat_base(vfs_handle_struct *handle,
173 struct smb_filename *smb_fname,
176 char *tmp_stream_name;
179 tmp_stream_name = smb_fname->stream_name;
180 smb_fname->stream_name = NULL;
182 result = SMB_VFS_NEXT_STAT(handle, smb_fname);
184 result = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
186 smb_fname->stream_name = tmp_stream_name;
190 static int streams_xattr_fstat(vfs_handle_struct *handle, files_struct *fsp,
191 SMB_STRUCT_STAT *sbuf)
193 struct smb_filename *smb_fname_base = NULL;
196 struct stream_io *io = (struct stream_io *)
197 VFS_FETCH_FSP_EXTENSION(handle, fsp);
199 DEBUG(10, ("streams_xattr_fstat called for %d\n", fsp->fh->fd));
201 if (io == NULL || fsp->base_fsp == NULL) {
202 return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
205 if (!streams_xattr_recheck(io)) {
209 /* Create an smb_filename with stream_name == NULL. */
210 status = create_synthetic_smb_fname(talloc_tos(),
214 if (!NT_STATUS_IS_OK(status)) {
215 errno = map_errno_from_nt_status(status);
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\n",
368 smb_fname_str_dbg(smb_fname)));
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 status = create_synthetic_smb_fname(talloc_tos(),
398 smb_fname->base_name,
401 if (!NT_STATUS_IS_OK(status)) {
402 errno = map_errno_from_nt_status(status);
407 * We use baseflags to turn off nasty side-effects when opening the
411 baseflags &= ~O_TRUNC;
412 baseflags &= ~O_EXCL;
413 baseflags &= ~O_CREAT;
415 hostfd = SMB_VFS_OPEN(handle->conn, smb_fname_base, fsp,
418 TALLOC_FREE(smb_fname_base);
420 /* It is legit to open a stream on a directory, but the base
421 * fd has to be read-only.
423 if ((hostfd == -1) && (errno == EISDIR)) {
424 baseflags &= ~O_ACCMODE;
425 baseflags |= O_RDONLY;
426 hostfd = SMB_VFS_OPEN(handle->conn, smb_fname, fsp, baseflags,
434 status = get_ea_value(talloc_tos(), handle->conn, NULL,
435 smb_fname->base_name, xattr_name, &ea);
437 DEBUG(10, ("get_ea_value returned %s\n", nt_errstr(status)));
439 if (!NT_STATUS_IS_OK(status)
440 && !NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
442 * The base file is not there. This is an error even if we got
443 * O_CREAT, the higher levels should have created the base
446 DEBUG(10, ("streams_xattr_open: base file %s not around, "
447 "returning ENOENT\n", smb_fname->base_name));
452 if (!NT_STATUS_IS_OK(status)) {
454 * The attribute does not exist
457 if (flags & O_CREAT) {
459 * Darn, xattrs need at least 1 byte
463 DEBUG(10, ("creating attribute %s on file %s\n",
464 xattr_name, smb_fname->base_name));
466 if (fsp->base_fsp->fh->fd != -1) {
467 if (SMB_VFS_FSETXATTR(
468 fsp->base_fsp, xattr_name,
470 flags & O_EXCL ? XATTR_CREATE : 0) == -1) {
474 if (SMB_VFS_SETXATTR(
475 handle->conn, smb_fname->base_name,
476 xattr_name, &null, sizeof(null),
477 flags & O_EXCL ? XATTR_CREATE : 0) == -1) {
484 if (flags & O_TRUNC) {
486 if (fsp->base_fsp->fh->fd != -1) {
487 if (SMB_VFS_FSETXATTR(
488 fsp->base_fsp, xattr_name,
490 flags & O_EXCL ? XATTR_CREATE : 0) == -1) {
494 if (SMB_VFS_SETXATTR(
495 handle->conn, smb_fname->base_name,
496 xattr_name, &null, sizeof(null),
497 flags & O_EXCL ? XATTR_CREATE : 0) == -1) {
503 sio = (struct stream_io *)VFS_ADD_FSP_EXTENSION(handle, fsp,
511 sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
513 sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
514 smb_fname->base_name);
515 sio->fsp_name_ptr = fsp->fsp_name;
516 sio->handle = handle;
519 if ((sio->xattr_name == NULL) || (sio->base == NULL)) {
529 * BUGBUGBUG -- we would need to call fd_close_posix here, but
530 * we don't have a full fsp yet
538 static int streams_xattr_unlink(vfs_handle_struct *handle,
539 const struct smb_filename *smb_fname)
545 if (!is_ntfs_stream_smb_fname(smb_fname)) {
546 return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
549 /* If the default stream is requested, just open the base file. */
550 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
551 struct smb_filename *smb_fname_base = NULL;
553 status = copy_smb_filename(talloc_tos(), smb_fname,
555 if (!NT_STATUS_IS_OK(status)) {
556 errno = map_errno_from_nt_status(status);
560 ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_base);
562 TALLOC_FREE(smb_fname_base);
566 status = streams_xattr_get_name(talloc_tos(), smb_fname->stream_name,
568 if (!NT_STATUS_IS_OK(status)) {
569 errno = map_errno_from_nt_status(status);
573 ret = SMB_VFS_REMOVEXATTR(handle->conn, smb_fname->base_name, xattr_name);
575 if ((ret == -1) && (errno == ENOATTR)) {
583 TALLOC_FREE(xattr_name);
587 static int streams_xattr_rename(vfs_handle_struct *handle,
588 const struct smb_filename *smb_fname_src,
589 const struct smb_filename *smb_fname_dst)
593 char *src_xattr_name = NULL;
594 char *dst_xattr_name = NULL;
595 bool src_is_stream, dst_is_stream;
600 src_is_stream = is_ntfs_stream_smb_fname(smb_fname_src);
601 dst_is_stream = is_ntfs_stream_smb_fname(smb_fname_dst);
603 if (!src_is_stream && !dst_is_stream) {
604 return SMB_VFS_NEXT_RENAME(handle, smb_fname_src,
608 /* For now don't allow renames from or to the default stream. */
609 if (is_ntfs_default_stream_smb_fname(smb_fname_src) ||
610 is_ntfs_default_stream_smb_fname(smb_fname_dst)) {
615 /* Don't rename if the streams are identical. */
616 if (StrCaseCmp(smb_fname_src->stream_name,
617 smb_fname_dst->stream_name) == 0) {
621 /* Get the xattr names. */
622 status = streams_xattr_get_name(talloc_tos(),
623 smb_fname_src->stream_name,
625 if (!NT_STATUS_IS_OK(status)) {
626 errno = map_errno_from_nt_status(status);
629 status = streams_xattr_get_name(talloc_tos(),
630 smb_fname_dst->stream_name,
632 if (!NT_STATUS_IS_OK(status)) {
633 errno = map_errno_from_nt_status(status);
637 /* read the old stream */
638 status = get_ea_value(talloc_tos(), handle->conn, NULL,
639 smb_fname_src->base_name, src_xattr_name, &ea);
640 if (!NT_STATUS_IS_OK(status)) {
645 /* (over)write the new stream */
646 nret = SMB_VFS_SETXATTR(handle->conn, smb_fname_src->base_name,
647 dst_xattr_name, ea.value.data, ea.value.length,
650 if (errno == ENOATTR) {
656 /* remove the old stream */
657 oret = SMB_VFS_REMOVEXATTR(handle->conn, smb_fname_src->base_name,
660 if (errno == ENOATTR) {
670 TALLOC_FREE(src_xattr_name);
671 TALLOC_FREE(dst_xattr_name);
675 static NTSTATUS walk_xattr_streams(connection_struct *conn, files_struct *fsp,
677 bool (*fn)(struct ea_struct *ea,
684 size_t prefix_len = strlen(SAMBA_XATTR_DOSSTREAM_PREFIX);
686 status = get_ea_names_from_file(talloc_tos(), conn, fsp, fname,
688 if (!NT_STATUS_IS_OK(status)) {
692 for (i=0; i<num_names; i++) {
695 if (strncmp(names[i], SAMBA_XATTR_DOSSTREAM_PREFIX,
700 status = get_ea_value(names, conn, fsp, fname, names[i], &ea);
701 if (!NT_STATUS_IS_OK(status)) {
702 DEBUG(10, ("Could not get ea %s for file %s: %s\n",
703 names[i], fname, nt_errstr(status)));
707 ea.name = talloc_asprintf(ea.value.data, ":%s",
708 names[i] + prefix_len);
709 if (ea.name == NULL) {
710 DEBUG(0, ("talloc failed\n"));
714 if (!fn(&ea, private_data)) {
715 TALLOC_FREE(ea.value.data);
719 TALLOC_FREE(ea.value.data);
726 static bool add_one_stream(TALLOC_CTX *mem_ctx, unsigned int *num_streams,
727 struct stream_struct **streams,
728 const char *name, SMB_OFF_T size,
729 SMB_OFF_T alloc_size)
731 struct stream_struct *tmp;
733 tmp = TALLOC_REALLOC_ARRAY(mem_ctx, *streams, struct stream_struct,
739 tmp[*num_streams].name = talloc_strdup(tmp, name);
740 if (tmp[*num_streams].name == NULL) {
744 tmp[*num_streams].size = size;
745 tmp[*num_streams].alloc_size = alloc_size;
752 struct streaminfo_state {
754 vfs_handle_struct *handle;
755 unsigned int num_streams;
756 struct stream_struct *streams;
760 static bool collect_one_stream(struct ea_struct *ea, void *private_data)
762 struct streaminfo_state *state =
763 (struct streaminfo_state *)private_data;
765 if (!add_one_stream(state->mem_ctx,
766 &state->num_streams, &state->streams,
767 ea->name, ea->value.length-1,
768 smb_roundup(state->handle->conn,
769 ea->value.length-1))) {
770 state->status = NT_STATUS_NO_MEMORY;
777 static NTSTATUS streams_xattr_streaminfo(vfs_handle_struct *handle,
778 struct files_struct *fsp,
781 unsigned int *pnum_streams,
782 struct stream_struct **pstreams)
784 SMB_STRUCT_STAT sbuf;
787 struct streaminfo_state state;
789 if ((fsp != NULL) && (fsp->fh->fd != -1)) {
790 ret = SMB_VFS_FSTAT(fsp, &sbuf);
793 struct smb_filename *smb_fname = NULL;
794 status = create_synthetic_smb_fname(talloc_tos(), fname, NULL,
796 if (!NT_STATUS_IS_OK(status)) {
799 if (lp_posix_pathnames()) {
800 ret = SMB_VFS_LSTAT(handle->conn, smb_fname);
802 ret = SMB_VFS_STAT(handle->conn, smb_fname);
804 sbuf = smb_fname->st;
805 TALLOC_FREE(smb_fname);
809 return map_nt_error_from_unix(errno);
812 state.streams = NULL;
813 state.num_streams = 0;
815 if (!S_ISDIR(sbuf.st_ex_mode)) {
816 if (!add_one_stream(mem_ctx,
817 &state.num_streams, &state.streams,
818 "::$DATA", sbuf.st_ex_size,
819 SMB_VFS_GET_ALLOC_SIZE(handle->conn, fsp,
821 return NT_STATUS_NO_MEMORY;
825 state.mem_ctx = mem_ctx;
826 state.handle = handle;
827 state.status = NT_STATUS_OK;
829 status = walk_xattr_streams(handle->conn, fsp, fname,
830 collect_one_stream, &state);
832 if (!NT_STATUS_IS_OK(status)) {
833 TALLOC_FREE(state.streams);
837 if (!NT_STATUS_IS_OK(state.status)) {
838 TALLOC_FREE(state.streams);
842 *pnum_streams = state.num_streams;
843 *pstreams = state.streams;
847 static uint32_t streams_xattr_fs_capabilities(struct vfs_handle_struct *handle,
848 enum timestamp_set_resolution *p_ts_res)
850 return SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res) | FILE_NAMED_STREAMS;
853 static ssize_t streams_xattr_pwrite(vfs_handle_struct *handle,
854 files_struct *fsp, const void *data,
855 size_t n, SMB_OFF_T offset)
857 struct stream_io *sio =
858 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
863 DEBUG(10, ("streams_xattr_pwrite called for %d bytes\n", (int)n));
866 return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
869 if (!streams_xattr_recheck(sio)) {
873 status = get_ea_value(talloc_tos(), handle->conn, fsp->base_fsp,
874 sio->base, sio->xattr_name, &ea);
875 if (!NT_STATUS_IS_OK(status)) {
879 if ((offset + n) > ea.value.length-1) {
882 tmp = TALLOC_REALLOC_ARRAY(talloc_tos(), ea.value.data, uint8,
886 TALLOC_FREE(ea.value.data);
891 ea.value.length = offset + n + 1;
892 ea.value.data[offset+n] = 0;
895 memcpy(ea.value.data + offset, data, n);
897 if (fsp->base_fsp->fh->fd != -1) {
898 ret = SMB_VFS_FSETXATTR(fsp->base_fsp,
900 ea.value.data, ea.value.length, 0);
902 ret = SMB_VFS_SETXATTR(fsp->conn,
903 fsp->base_fsp->fsp_name->base_name,
905 ea.value.data, ea.value.length, 0);
907 TALLOC_FREE(ea.value.data);
916 static ssize_t streams_xattr_pread(vfs_handle_struct *handle,
917 files_struct *fsp, void *data,
918 size_t n, SMB_OFF_T offset)
920 struct stream_io *sio =
921 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
924 size_t length, overlap;
926 DEBUG(10, ("streams_xattr_pread: offset=%d, size=%d\n",
927 (int)offset, (int)n));
930 return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
933 if (!streams_xattr_recheck(sio)) {
937 status = get_ea_value(talloc_tos(), handle->conn, fsp->base_fsp,
938 sio->base, sio->xattr_name, &ea);
939 if (!NT_STATUS_IS_OK(status)) {
943 length = ea.value.length-1;
945 DEBUG(10, ("streams_xattr_pread: get_ea_value returned %d bytes\n",
948 /* Attempt to read past EOF. */
949 if (length <= offset) {
953 overlap = (offset + n) > length ? (length - offset) : n;
954 memcpy(data, ea.value.data + offset, overlap);
956 TALLOC_FREE(ea.value.data);
960 static int streams_xattr_ftruncate(struct vfs_handle_struct *handle,
961 struct files_struct *fsp,
968 struct stream_io *sio =
969 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
971 DEBUG(10, ("streams_xattr_ftruncate called for file %s offset %.0f\n",
972 fsp_str_dbg(fsp), (double)offset));
975 return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
978 if (!streams_xattr_recheck(sio)) {
982 status = get_ea_value(talloc_tos(), handle->conn, fsp->base_fsp,
983 sio->base, sio->xattr_name, &ea);
984 if (!NT_STATUS_IS_OK(status)) {
988 tmp = TALLOC_REALLOC_ARRAY(talloc_tos(), ea.value.data, uint8,
992 TALLOC_FREE(ea.value.data);
997 /* Did we expand ? */
998 if (ea.value.length < offset + 1) {
999 memset(&tmp[ea.value.length], '\0',
1000 offset + 1 - ea.value.length);
1003 ea.value.data = tmp;
1004 ea.value.length = offset + 1;
1005 ea.value.data[offset] = 0;
1007 if (fsp->base_fsp->fh->fd != -1) {
1008 ret = SMB_VFS_FSETXATTR(fsp->base_fsp,
1010 ea.value.data, ea.value.length, 0);
1012 ret = SMB_VFS_SETXATTR(fsp->conn,
1013 fsp->base_fsp->fsp_name->base_name,
1015 ea.value.data, ea.value.length, 0);
1018 TALLOC_FREE(ea.value.data);
1027 static int streams_xattr_fallocate(struct vfs_handle_struct *handle,
1028 struct files_struct *fsp,
1029 enum vfs_fallocate_mode mode,
1033 struct stream_io *sio =
1034 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1036 DEBUG(10, ("streams_xattr_fallocate called for file %s offset %.0f"
1038 fsp_str_dbg(fsp), (double)offset, (double)len));
1041 return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
1044 if (!streams_xattr_recheck(sio)) {
1048 /* Let the pwrite code path handle it. */
1053 static struct vfs_fn_pointers vfs_streams_xattr_fns = {
1054 .fs_capabilities = streams_xattr_fs_capabilities,
1055 .open = streams_xattr_open,
1056 .stat = streams_xattr_stat,
1057 .fstat = streams_xattr_fstat,
1058 .lstat = streams_xattr_lstat,
1059 .pread = streams_xattr_pread,
1060 .pwrite = streams_xattr_pwrite,
1061 .unlink = streams_xattr_unlink,
1062 .rename = streams_xattr_rename,
1063 .ftruncate = streams_xattr_ftruncate,
1064 .fallocate = streams_xattr_fallocate,
1065 .streaminfo = streams_xattr_streaminfo,
1068 NTSTATUS vfs_streams_xattr_init(void);
1069 NTSTATUS vfs_streams_xattr_init(void)
1071 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "streams_xattr",
1072 &vfs_streams_xattr_fns);