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
32 struct streams_xattr_config {
35 bool store_stream_type;
43 vfs_handle_struct *handle;
46 static SMB_INO_T stream_inode(const SMB_STRUCT_STAT *sbuf, const char *sname)
49 unsigned char hash[16];
53 DEBUG(10, ("stream_inode called for %lu/%lu [%s]\n",
54 (unsigned long)sbuf->st_ex_dev,
55 (unsigned long)sbuf->st_ex_ino, sname));
57 upper_sname = talloc_strdup_upper(talloc_tos(), sname);
58 SMB_ASSERT(upper_sname != NULL);
61 MD5Update(&ctx, (const unsigned char *)&(sbuf->st_ex_dev),
62 sizeof(sbuf->st_ex_dev));
63 MD5Update(&ctx, (const unsigned char *)&(sbuf->st_ex_ino),
64 sizeof(sbuf->st_ex_ino));
65 MD5Update(&ctx, (unsigned char *)upper_sname,
66 talloc_get_size(upper_sname)-1);
69 TALLOC_FREE(upper_sname);
71 /* Hopefully all the variation is in the lower 4 (or 8) bytes! */
72 memcpy(&result, hash, sizeof(result));
74 DEBUG(10, ("stream_inode returns %lu\n", (unsigned long)result));
79 static ssize_t get_xattr_size(connection_struct *conn,
82 const char *xattr_name)
88 status = get_ea_value(talloc_tos(), conn, fsp, fname,
91 if (!NT_STATUS_IS_OK(status)) {
95 result = ea.value.length-1;
96 TALLOC_FREE(ea.value.data);
101 * Given a stream name, populate xattr_name with the xattr name to use for
102 * accessing the stream.
104 static NTSTATUS streams_xattr_get_name(vfs_handle_struct *handle,
106 const char *stream_name,
111 struct streams_xattr_config *config;
113 SMB_VFS_HANDLE_GET_DATA(handle, config, struct streams_xattr_config,
114 return NT_STATUS_UNSUCCESSFUL);
116 sname = talloc_strdup(ctx, stream_name + 1);
118 return NT_STATUS_NO_MEMORY;
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.
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
132 * In check_path_syntax() we've already ensured the streamname
133 * we got from the client is valid.
135 stype = strrchr_m(sname, ':');
139 * We only support one stream type: "$DATA"
141 if (strcasecmp_m(stype, ":$DATA") != 0) {
143 return NT_STATUS_INVALID_PARAMETER;
146 /* Split name and type */
150 *xattr_name = talloc_asprintf(ctx, "%s%s%s",
153 config->store_stream_type ? ":$DATA" : "");
154 if (*xattr_name == NULL) {
156 return NT_STATUS_NO_MEMORY;
159 DEBUG(10, ("xattr_name: %s, stream_name: %s\n", *xattr_name,
166 static bool streams_xattr_recheck(struct stream_io *sio)
169 char *xattr_name = NULL;
171 if (sio->fsp->fsp_name == sio->fsp_name_ptr) {
175 if (sio->fsp->fsp_name->stream_name == NULL) {
176 /* how can this happen */
181 status = streams_xattr_get_name(sio->handle, talloc_tos(),
182 sio->fsp->fsp_name->stream_name,
184 if (!NT_STATUS_IS_OK(status)) {
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),
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;
196 TALLOC_FREE(xattr_name);
198 if ((sio->xattr_name == NULL) || (sio->base == NULL)) {
206 * Helper to stat/lstat the base file of an smb_fname.
208 static int streams_xattr_stat_base(vfs_handle_struct *handle,
209 struct smb_filename *smb_fname,
212 char *tmp_stream_name;
215 tmp_stream_name = smb_fname->stream_name;
216 smb_fname->stream_name = NULL;
218 result = SMB_VFS_NEXT_STAT(handle, smb_fname);
220 result = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
222 smb_fname->stream_name = tmp_stream_name;
226 static int streams_xattr_fstat(vfs_handle_struct *handle, files_struct *fsp,
227 SMB_STRUCT_STAT *sbuf)
229 struct smb_filename *smb_fname_base = NULL;
231 struct stream_io *io = (struct stream_io *)
232 VFS_FETCH_FSP_EXTENSION(handle, fsp);
234 DEBUG(10, ("streams_xattr_fstat called for %d\n", fsp->fh->fd));
236 if (io == NULL || fsp->base_fsp == NULL) {
237 return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
240 if (!streams_xattr_recheck(io)) {
244 /* Create an smb_filename with stream_name == NULL. */
245 smb_fname_base = synthetic_smb_fname(talloc_tos(), io->base,
247 if (smb_fname_base == NULL) {
252 if (lp_posix_pathnames()) {
253 ret = SMB_VFS_LSTAT(handle->conn, smb_fname_base);
255 ret = SMB_VFS_STAT(handle->conn, smb_fname_base);
257 *sbuf = smb_fname_base->st;
258 TALLOC_FREE(smb_fname_base);
264 sbuf->st_ex_size = get_xattr_size(handle->conn, fsp->base_fsp,
265 io->base, io->xattr_name);
266 if (sbuf->st_ex_size == -1) {
270 DEBUG(10, ("sbuf->st_ex_size = %d\n", (int)sbuf->st_ex_size));
272 sbuf->st_ex_ino = stream_inode(sbuf, io->xattr_name);
273 sbuf->st_ex_mode &= ~S_IFMT;
274 sbuf->st_ex_mode |= S_IFREG;
275 sbuf->st_ex_blocks = sbuf->st_ex_size / STAT_ST_BLOCKSIZE + 1;
280 static int streams_xattr_stat(vfs_handle_struct *handle,
281 struct smb_filename *smb_fname)
285 char *xattr_name = NULL;
287 if (!is_ntfs_stream_smb_fname(smb_fname)) {
288 return SMB_VFS_NEXT_STAT(handle, smb_fname);
291 /* Note if lp_posix_paths() is true, we can never
292 * get here as is_ntfs_stream_smb_fname() is
293 * always false. So we never need worry about
294 * not following links here. */
296 /* If the default stream is requested, just stat the base file. */
297 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
298 return streams_xattr_stat_base(handle, smb_fname, true);
301 /* Populate the stat struct with info from the base file. */
302 if (streams_xattr_stat_base(handle, smb_fname, true) == -1) {
306 /* Derive the xattr name to lookup. */
307 status = streams_xattr_get_name(handle, talloc_tos(),
308 smb_fname->stream_name, &xattr_name);
309 if (!NT_STATUS_IS_OK(status)) {
310 errno = map_errno_from_nt_status(status);
314 /* Augment the base file's stat information before returning. */
315 smb_fname->st.st_ex_size = get_xattr_size(handle->conn, NULL,
316 smb_fname->base_name,
318 if (smb_fname->st.st_ex_size == -1) {
324 smb_fname->st.st_ex_ino = stream_inode(&smb_fname->st, xattr_name);
325 smb_fname->st.st_ex_mode &= ~S_IFMT;
326 smb_fname->st.st_ex_mode |= S_IFREG;
327 smb_fname->st.st_ex_blocks =
328 smb_fname->st.st_ex_size / STAT_ST_BLOCKSIZE + 1;
332 TALLOC_FREE(xattr_name);
336 static int streams_xattr_lstat(vfs_handle_struct *handle,
337 struct smb_filename *smb_fname)
341 char *xattr_name = NULL;
343 if (!is_ntfs_stream_smb_fname(smb_fname)) {
344 return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
347 /* If the default stream is requested, just stat the base file. */
348 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
349 return streams_xattr_stat_base(handle, smb_fname, false);
352 /* Populate the stat struct with info from the base file. */
353 if (streams_xattr_stat_base(handle, smb_fname, false) == -1) {
357 /* Derive the xattr name to lookup. */
358 status = streams_xattr_get_name(handle, talloc_tos(),
359 smb_fname->stream_name, &xattr_name);
360 if (!NT_STATUS_IS_OK(status)) {
361 errno = map_errno_from_nt_status(status);
365 /* Augment the base file's stat information before returning. */
366 smb_fname->st.st_ex_size = get_xattr_size(handle->conn, NULL,
367 smb_fname->base_name,
369 if (smb_fname->st.st_ex_size == -1) {
375 smb_fname->st.st_ex_ino = stream_inode(&smb_fname->st, xattr_name);
376 smb_fname->st.st_ex_mode &= ~S_IFMT;
377 smb_fname->st.st_ex_mode |= S_IFREG;
378 smb_fname->st.st_ex_blocks =
379 smb_fname->st.st_ex_size / STAT_ST_BLOCKSIZE + 1;
384 TALLOC_FREE(xattr_name);
388 static int streams_xattr_open(vfs_handle_struct *handle,
389 struct smb_filename *smb_fname,
390 files_struct *fsp, int flags, mode_t mode)
393 struct smb_filename *smb_fname_base = NULL;
394 struct stream_io *sio;
396 char *xattr_name = NULL;
400 DEBUG(10, ("streams_xattr_open called for %s with flags 0x%x\n",
401 smb_fname_str_dbg(smb_fname), flags));
403 if (!is_ntfs_stream_smb_fname(smb_fname)) {
404 return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
407 /* If the default stream is requested, just open the base file. */
408 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
409 char *tmp_stream_name;
412 tmp_stream_name = smb_fname->stream_name;
413 smb_fname->stream_name = NULL;
415 ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
417 smb_fname->stream_name = tmp_stream_name;
422 status = streams_xattr_get_name(handle, talloc_tos(),
423 smb_fname->stream_name, &xattr_name);
424 if (!NT_STATUS_IS_OK(status)) {
425 errno = map_errno_from_nt_status(status);
429 /* Create an smb_filename with stream_name == NULL. */
430 smb_fname_base = synthetic_smb_fname(
431 talloc_tos(), smb_fname->base_name, NULL, NULL);
432 if (smb_fname_base == NULL) {
438 * We use baseflags to turn off nasty side-effects when opening the
442 baseflags &= ~O_TRUNC;
443 baseflags &= ~O_EXCL;
444 baseflags &= ~O_CREAT;
446 hostfd = SMB_VFS_OPEN(handle->conn, smb_fname_base, fsp,
449 TALLOC_FREE(smb_fname_base);
451 /* It is legit to open a stream on a directory, but the base
452 * fd has to be read-only.
454 if ((hostfd == -1) && (errno == EISDIR)) {
455 baseflags &= ~O_ACCMODE;
456 baseflags |= O_RDONLY;
457 hostfd = SMB_VFS_OPEN(handle->conn, smb_fname, fsp, baseflags,
465 status = get_ea_value(talloc_tos(), handle->conn, NULL,
466 smb_fname->base_name, xattr_name, &ea);
468 DEBUG(10, ("get_ea_value returned %s\n", nt_errstr(status)));
470 if (!NT_STATUS_IS_OK(status)
471 && !NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
473 * The base file is not there. This is an error even if we got
474 * O_CREAT, the higher levels should have created the base
477 DEBUG(10, ("streams_xattr_open: base file %s not around, "
478 "returning ENOENT\n", smb_fname->base_name));
483 if ((!NT_STATUS_IS_OK(status) && (flags & O_CREAT)) ||
486 * The attribute does not exist or needs to be truncated
490 * Darn, xattrs need at least 1 byte
494 DEBUG(10, ("creating or truncating attribute %s on file %s\n",
495 xattr_name, smb_fname->base_name));
497 if (fsp->base_fsp->fh->fd != -1) {
498 if (SMB_VFS_FSETXATTR(
499 fsp->base_fsp, xattr_name,
501 flags & O_EXCL ? XATTR_CREATE : 0) == -1) {
505 if (SMB_VFS_SETXATTR(
506 handle->conn, smb_fname->base_name,
507 xattr_name, &null, sizeof(null),
508 flags & O_EXCL ? XATTR_CREATE : 0) == -1) {
514 sio = (struct stream_io *)VFS_ADD_FSP_EXTENSION(handle, fsp,
522 sio->xattr_name = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
524 sio->base = talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle, fsp),
525 smb_fname->base_name);
526 sio->fsp_name_ptr = fsp->fsp_name;
527 sio->handle = handle;
530 if ((sio->xattr_name == NULL) || (sio->base == NULL)) {
540 * BUGBUGBUG -- we would need to call fd_close_posix here, but
541 * we don't have a full fsp yet
543 fsp->fh->fd = hostfd;
550 static int streams_xattr_unlink(vfs_handle_struct *handle,
551 const struct smb_filename *smb_fname)
555 char *xattr_name = NULL;
557 if (!is_ntfs_stream_smb_fname(smb_fname)) {
558 return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
561 /* If the default stream is requested, just open the base file. */
562 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
563 struct smb_filename *smb_fname_base = NULL;
565 smb_fname_base = cp_smb_filename(talloc_tos(), smb_fname);
566 if (smb_fname_base == NULL) {
571 ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_base);
573 TALLOC_FREE(smb_fname_base);
577 status = streams_xattr_get_name(handle, talloc_tos(),
578 smb_fname->stream_name, &xattr_name);
579 if (!NT_STATUS_IS_OK(status)) {
580 errno = map_errno_from_nt_status(status);
584 ret = SMB_VFS_REMOVEXATTR(handle->conn, smb_fname->base_name, xattr_name);
586 if ((ret == -1) && (errno == ENOATTR)) {
594 TALLOC_FREE(xattr_name);
598 static int streams_xattr_rename(vfs_handle_struct *handle,
599 const struct smb_filename *smb_fname_src,
600 const struct smb_filename *smb_fname_dst)
604 char *src_xattr_name = NULL;
605 char *dst_xattr_name = NULL;
606 bool src_is_stream, dst_is_stream;
611 src_is_stream = is_ntfs_stream_smb_fname(smb_fname_src);
612 dst_is_stream = is_ntfs_stream_smb_fname(smb_fname_dst);
614 if (!src_is_stream && !dst_is_stream) {
615 return SMB_VFS_NEXT_RENAME(handle, smb_fname_src,
619 /* For now don't allow renames from or to the default stream. */
620 if (is_ntfs_default_stream_smb_fname(smb_fname_src) ||
621 is_ntfs_default_stream_smb_fname(smb_fname_dst)) {
626 /* Don't rename if the streams are identical. */
627 if (strcasecmp_m(smb_fname_src->stream_name,
628 smb_fname_dst->stream_name) == 0) {
632 /* Get the xattr names. */
633 status = streams_xattr_get_name(handle, talloc_tos(),
634 smb_fname_src->stream_name,
636 if (!NT_STATUS_IS_OK(status)) {
637 errno = map_errno_from_nt_status(status);
640 status = streams_xattr_get_name(handle, talloc_tos(),
641 smb_fname_dst->stream_name,
643 if (!NT_STATUS_IS_OK(status)) {
644 errno = map_errno_from_nt_status(status);
648 /* read the old stream */
649 status = get_ea_value(talloc_tos(), handle->conn, NULL,
650 smb_fname_src->base_name, src_xattr_name, &ea);
651 if (!NT_STATUS_IS_OK(status)) {
656 /* (over)write the new stream */
657 nret = SMB_VFS_SETXATTR(handle->conn, smb_fname_src->base_name,
658 dst_xattr_name, ea.value.data, ea.value.length,
661 if (errno == ENOATTR) {
667 /* remove the old stream */
668 oret = SMB_VFS_REMOVEXATTR(handle->conn, smb_fname_src->base_name,
671 if (errno == ENOATTR) {
681 TALLOC_FREE(src_xattr_name);
682 TALLOC_FREE(dst_xattr_name);
686 static NTSTATUS walk_xattr_streams(vfs_handle_struct *handle, files_struct *fsp,
688 bool (*fn)(struct ea_struct *ea,
695 struct streams_xattr_config *config;
697 SMB_VFS_HANDLE_GET_DATA(handle, config, struct streams_xattr_config,
698 return NT_STATUS_UNSUCCESSFUL);
700 status = get_ea_names_from_file(talloc_tos(), handle->conn, fsp, fname,
702 if (!NT_STATUS_IS_OK(status)) {
706 for (i=0; i<num_names; i++) {
710 * We want to check with samba_private_attr_name()
711 * whether the xattr name is a private one,
712 * unfortunately it flags xattrs that begin with the
713 * default streams prefix as private.
715 * By only calling samba_private_attr_name() in case
716 * the xattr does NOT begin with the default prefix,
717 * we know that if it returns 'true' it definitely one
718 * of our internal xattr like "user.DOSATTRIB".
720 if (strncasecmp_m(names[i], SAMBA_XATTR_DOSSTREAM_PREFIX,
721 strlen(SAMBA_XATTR_DOSSTREAM_PREFIX)) != 0) {
722 if (samba_private_attr_name(names[i])) {
727 if (strncmp(names[i], config->prefix,
728 config->prefix_len) != 0) {
732 status = get_ea_value(names, handle->conn, fsp, fname,
734 if (!NT_STATUS_IS_OK(status)) {
735 DEBUG(10, ("Could not get ea %s for file %s: %s\n",
736 names[i], fname, nt_errstr(status)));
740 ea.name = talloc_asprintf(
741 ea.value.data, ":%s%s",
742 names[i] + config->prefix_len,
743 config->store_stream_type ? "" : ":$DATA");
744 if (ea.name == NULL) {
745 DEBUG(0, ("talloc failed\n"));
749 if (!fn(&ea, private_data)) {
750 TALLOC_FREE(ea.value.data);
754 TALLOC_FREE(ea.value.data);
761 static bool add_one_stream(TALLOC_CTX *mem_ctx, unsigned int *num_streams,
762 struct stream_struct **streams,
763 const char *name, off_t size,
766 struct stream_struct *tmp;
768 tmp = talloc_realloc(mem_ctx, *streams, struct stream_struct,
774 tmp[*num_streams].name = talloc_strdup(tmp, name);
775 if (tmp[*num_streams].name == NULL) {
779 tmp[*num_streams].size = size;
780 tmp[*num_streams].alloc_size = alloc_size;
787 struct streaminfo_state {
789 vfs_handle_struct *handle;
790 unsigned int num_streams;
791 struct stream_struct *streams;
795 static bool collect_one_stream(struct ea_struct *ea, void *private_data)
797 struct streaminfo_state *state =
798 (struct streaminfo_state *)private_data;
800 if (!add_one_stream(state->mem_ctx,
801 &state->num_streams, &state->streams,
802 ea->name, ea->value.length-1,
803 smb_roundup(state->handle->conn,
804 ea->value.length-1))) {
805 state->status = NT_STATUS_NO_MEMORY;
812 static NTSTATUS streams_xattr_streaminfo(vfs_handle_struct *handle,
813 struct files_struct *fsp,
814 const struct smb_filename *smb_fname,
816 unsigned int *pnum_streams,
817 struct stream_struct **pstreams)
819 SMB_STRUCT_STAT sbuf;
822 struct streaminfo_state state;
824 if ((fsp != NULL) && (fsp->fh->fd != -1)) {
825 ret = SMB_VFS_FSTAT(fsp, &sbuf);
828 struct smb_filename *smb_fname_base = NULL;
829 smb_fname_base = synthetic_smb_fname(talloc_tos(),
830 smb_fname->base_name,
833 if (smb_fname_base == NULL) {
834 return NT_STATUS_NO_MEMORY;
836 if (lp_posix_pathnames()) {
837 ret = SMB_VFS_LSTAT(handle->conn, smb_fname_base);
839 ret = SMB_VFS_STAT(handle->conn, smb_fname_base);
841 sbuf = smb_fname_base->st;
842 TALLOC_FREE(smb_fname_base);
846 return map_nt_error_from_unix(errno);
849 state.streams = *pstreams;
850 state.num_streams = *pnum_streams;
851 state.mem_ctx = mem_ctx;
852 state.handle = handle;
853 state.status = NT_STATUS_OK;
855 if (S_ISLNK(sbuf.st_ex_mode)) {
857 * Currently we do't have SMB_VFS_LLISTXATTR
858 * inside the VFS which means there's no way
859 * to cope with a symlink when lp_posix_pathnames().
860 * returns true. For now ignore links.
861 * FIXME - by adding SMB_VFS_LLISTXATTR. JRA.
863 status = NT_STATUS_OK;
865 status = walk_xattr_streams(handle, fsp, smb_fname->base_name,
866 collect_one_stream, &state);
869 if (!NT_STATUS_IS_OK(status)) {
870 TALLOC_FREE(state.streams);
874 if (!NT_STATUS_IS_OK(state.status)) {
875 TALLOC_FREE(state.streams);
879 *pnum_streams = state.num_streams;
880 *pstreams = state.streams;
882 return SMB_VFS_NEXT_STREAMINFO(handle,
890 static uint32_t streams_xattr_fs_capabilities(struct vfs_handle_struct *handle,
891 enum timestamp_set_resolution *p_ts_res)
893 return SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res) | FILE_NAMED_STREAMS;
896 static int streams_xattr_connect(vfs_handle_struct *handle,
897 const char *service, const char *user)
899 struct streams_xattr_config *config;
900 const char *default_prefix = SAMBA_XATTR_DOSSTREAM_PREFIX;
904 rc = SMB_VFS_NEXT_CONNECT(handle, service, user);
909 config = talloc_zero(handle->conn, struct streams_xattr_config);
910 if (config == NULL) {
911 DEBUG(1, ("talloc_zero() failed\n"));
916 prefix = lp_parm_const_string(SNUM(handle->conn),
917 "streams_xattr", "prefix",
919 config->prefix = talloc_strdup(config, prefix);
920 if (config->prefix == NULL) {
921 DEBUG(1, ("talloc_strdup() failed\n"));
925 config->prefix_len = strlen(config->prefix);
926 DEBUG(10, ("streams_xattr using stream prefix: %s\n", config->prefix));
928 config->store_stream_type = lp_parm_bool(SNUM(handle->conn),
933 SMB_VFS_HANDLE_SET_DATA(handle, config,
934 NULL, struct stream_xattr_config,
940 static ssize_t streams_xattr_pwrite(vfs_handle_struct *handle,
941 files_struct *fsp, const void *data,
942 size_t n, off_t offset)
944 struct stream_io *sio =
945 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
950 DEBUG(10, ("streams_xattr_pwrite called for %d bytes\n", (int)n));
953 return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
956 if (!streams_xattr_recheck(sio)) {
960 status = get_ea_value(talloc_tos(), handle->conn, fsp->base_fsp,
961 sio->base, sio->xattr_name, &ea);
962 if (!NT_STATUS_IS_OK(status)) {
966 if ((offset + n) > ea.value.length-1) {
969 tmp = talloc_realloc(talloc_tos(), ea.value.data, uint8_t,
973 TALLOC_FREE(ea.value.data);
978 ea.value.length = offset + n + 1;
979 ea.value.data[offset+n] = 0;
982 memcpy(ea.value.data + offset, data, n);
984 if (fsp->base_fsp->fh->fd != -1) {
985 ret = SMB_VFS_FSETXATTR(fsp->base_fsp,
987 ea.value.data, ea.value.length, 0);
989 ret = SMB_VFS_SETXATTR(fsp->conn,
990 fsp->base_fsp->fsp_name->base_name,
992 ea.value.data, ea.value.length, 0);
994 TALLOC_FREE(ea.value.data);
1003 static ssize_t streams_xattr_pread(vfs_handle_struct *handle,
1004 files_struct *fsp, void *data,
1005 size_t n, off_t offset)
1007 struct stream_io *sio =
1008 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1009 struct ea_struct ea;
1011 size_t length, overlap;
1013 DEBUG(10, ("streams_xattr_pread: offset=%d, size=%d\n",
1014 (int)offset, (int)n));
1017 return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
1020 if (!streams_xattr_recheck(sio)) {
1024 status = get_ea_value(talloc_tos(), handle->conn, fsp->base_fsp,
1025 sio->base, sio->xattr_name, &ea);
1026 if (!NT_STATUS_IS_OK(status)) {
1030 length = ea.value.length-1;
1032 DEBUG(10, ("streams_xattr_pread: get_ea_value returned %d bytes\n",
1035 /* Attempt to read past EOF. */
1036 if (length <= offset) {
1040 overlap = (offset + n) > length ? (length - offset) : n;
1041 memcpy(data, ea.value.data + offset, overlap);
1043 TALLOC_FREE(ea.value.data);
1047 static int streams_xattr_ftruncate(struct vfs_handle_struct *handle,
1048 struct files_struct *fsp,
1053 struct ea_struct ea;
1055 struct stream_io *sio =
1056 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1058 DEBUG(10, ("streams_xattr_ftruncate called for file %s offset %.0f\n",
1059 fsp_str_dbg(fsp), (double)offset));
1062 return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
1065 if (!streams_xattr_recheck(sio)) {
1069 status = get_ea_value(talloc_tos(), handle->conn, fsp->base_fsp,
1070 sio->base, sio->xattr_name, &ea);
1071 if (!NT_STATUS_IS_OK(status)) {
1075 tmp = talloc_realloc(talloc_tos(), ea.value.data, uint8_t,
1079 TALLOC_FREE(ea.value.data);
1084 /* Did we expand ? */
1085 if (ea.value.length < offset + 1) {
1086 memset(&tmp[ea.value.length], '\0',
1087 offset + 1 - ea.value.length);
1090 ea.value.data = tmp;
1091 ea.value.length = offset + 1;
1092 ea.value.data[offset] = 0;
1094 if (fsp->base_fsp->fh->fd != -1) {
1095 ret = SMB_VFS_FSETXATTR(fsp->base_fsp,
1097 ea.value.data, ea.value.length, 0);
1099 ret = SMB_VFS_SETXATTR(fsp->conn,
1100 fsp->base_fsp->fsp_name->base_name,
1102 ea.value.data, ea.value.length, 0);
1105 TALLOC_FREE(ea.value.data);
1114 static int streams_xattr_fallocate(struct vfs_handle_struct *handle,
1115 struct files_struct *fsp,
1120 struct stream_io *sio =
1121 (struct stream_io *)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1123 DEBUG(10, ("streams_xattr_fallocate called for file %s offset %.0f"
1125 fsp_str_dbg(fsp), (double)offset, (double)len));
1128 return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
1131 if (!streams_xattr_recheck(sio)) {
1135 /* Let the pwrite code path handle it. */
1141 static struct vfs_fn_pointers vfs_streams_xattr_fns = {
1142 .fs_capabilities_fn = streams_xattr_fs_capabilities,
1143 .connect_fn = streams_xattr_connect,
1144 .open_fn = streams_xattr_open,
1145 .stat_fn = streams_xattr_stat,
1146 .fstat_fn = streams_xattr_fstat,
1147 .lstat_fn = streams_xattr_lstat,
1148 .pread_fn = streams_xattr_pread,
1149 .pwrite_fn = streams_xattr_pwrite,
1150 .unlink_fn = streams_xattr_unlink,
1151 .rename_fn = streams_xattr_rename,
1152 .ftruncate_fn = streams_xattr_ftruncate,
1153 .fallocate_fn = streams_xattr_fallocate,
1154 .streaminfo_fn = streams_xattr_streaminfo,
1157 NTSTATUS vfs_streams_xattr_init(void);
1158 NTSTATUS vfs_streams_xattr_init(void)
1160 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "streams_xattr",
1161 &vfs_streams_xattr_fns);