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/util/tevent_unix.h"
28 #include "librpc/gen_ndr/ioctl.h"
29 #include "hash_inode.h"
32 #define DBGC_CLASS DBGC_VFS
34 struct streams_xattr_config
{
37 bool store_stream_type
;
45 vfs_handle_struct
*handle
;
48 static ssize_t
get_xattr_size_fsp(struct files_struct
*fsp
,
49 const char *xattr_name
)
55 status
= get_ea_value_fsp(talloc_tos(),
59 if (!NT_STATUS_IS_OK(status
)) {
63 result
= ea
.value
.length
-1;
64 TALLOC_FREE(ea
.value
.data
);
69 * Given a stream name, populate xattr_name with the xattr name to use for
70 * accessing the stream.
72 static NTSTATUS
streams_xattr_get_name(vfs_handle_struct
*handle
,
74 const char *stream_name
,
79 struct streams_xattr_config
*config
;
81 SMB_VFS_HANDLE_GET_DATA(handle
, config
, struct streams_xattr_config
,
82 return NT_STATUS_UNSUCCESSFUL
);
84 sname
= talloc_strdup(ctx
, stream_name
+ 1);
86 return NT_STATUS_NO_MEMORY
;
90 * With vfs_fruit option "fruit:encoding = native" we're
91 * already converting stream names that contain illegal NTFS
92 * characters from their on-the-wire Unicode Private Range
93 * encoding to their native ASCII representation.
95 * As as result the name of xattrs storing the streams (via
96 * vfs_streams_xattr) may contain a colon, so we have to use
97 * strrchr_m() instead of strchr_m() for matching the stream
100 * In check_path_syntax() we've already ensured the streamname
101 * we got from the client is valid.
103 stype
= strrchr_m(sname
, ':');
107 * We only support one stream type: "$DATA"
109 if (strcasecmp_m(stype
, ":$DATA") != 0) {
111 return NT_STATUS_INVALID_PARAMETER
;
114 /* Split name and type */
118 *xattr_name
= talloc_asprintf(ctx
, "%s%s%s",
121 config
->store_stream_type
? ":$DATA" : "");
122 if (*xattr_name
== NULL
) {
124 return NT_STATUS_NO_MEMORY
;
127 DEBUG(10, ("xattr_name: %s, stream_name: %s\n", *xattr_name
,
134 static bool streams_xattr_recheck(struct stream_io
*sio
)
137 char *xattr_name
= NULL
;
139 if (sio
->fsp
->fsp_name
== sio
->fsp_name_ptr
) {
143 if (sio
->fsp
->fsp_name
->stream_name
== NULL
) {
144 /* how can this happen */
149 status
= streams_xattr_get_name(sio
->handle
, talloc_tos(),
150 sio
->fsp
->fsp_name
->stream_name
,
152 if (!NT_STATUS_IS_OK(status
)) {
156 TALLOC_FREE(sio
->xattr_name
);
157 TALLOC_FREE(sio
->base
);
158 sio
->xattr_name
= talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio
->handle
, sio
->fsp
),
160 if (sio
->xattr_name
== NULL
) {
161 DBG_DEBUG("sio->xattr_name==NULL\n");
164 TALLOC_FREE(xattr_name
);
166 sio
->base
= talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(sio
->handle
, sio
->fsp
),
167 sio
->fsp
->fsp_name
->base_name
);
168 if (sio
->base
== NULL
) {
169 DBG_DEBUG("sio->base==NULL\n");
173 sio
->fsp_name_ptr
= sio
->fsp
->fsp_name
;
178 static int streams_xattr_fstat(vfs_handle_struct
*handle
, files_struct
*fsp
,
179 SMB_STRUCT_STAT
*sbuf
)
182 struct stream_io
*io
= (struct stream_io
*)
183 VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
185 if (io
== NULL
|| !fsp_is_alternate_stream(fsp
)) {
186 return SMB_VFS_NEXT_FSTAT(handle
, fsp
, sbuf
);
189 DBG_DEBUG("streams_xattr_fstat called for %s\n", fsp_str_dbg(io
->fsp
));
191 if (!streams_xattr_recheck(io
)) {
195 ret
= SMB_VFS_NEXT_FSTAT(handle
, fsp
->base_fsp
, sbuf
);
200 sbuf
->st_ex_size
= get_xattr_size_fsp(fsp
->base_fsp
,
202 if (sbuf
->st_ex_size
== -1) {
203 SET_STAT_INVALID(*sbuf
);
207 DEBUG(10, ("sbuf->st_ex_size = %d\n", (int)sbuf
->st_ex_size
));
209 sbuf
->st_ex_ino
= hash_inode(sbuf
, io
->xattr_name
);
210 sbuf
->st_ex_mode
&= ~S_IFMT
;
211 sbuf
->st_ex_mode
&= ~S_IFDIR
;
212 sbuf
->st_ex_mode
|= S_IFREG
;
213 sbuf
->st_ex_blocks
= sbuf
->st_ex_size
/ STAT_ST_BLOCKSIZE
+ 1;
218 static int streams_xattr_stat(vfs_handle_struct
*handle
,
219 struct smb_filename
*smb_fname
)
223 char *xattr_name
= NULL
;
224 char *tmp_stream_name
= NULL
;
225 struct smb_filename
*pathref
= NULL
;
226 struct files_struct
*fsp
= smb_fname
->fsp
;
228 if (!is_named_stream(smb_fname
)) {
229 return SMB_VFS_NEXT_STAT(handle
, smb_fname
);
232 /* Note if lp_posix_paths() is true, we can never
233 * get here as is_named_stream() is
234 * always false. So we never need worry about
235 * not following links here. */
237 /* Populate the stat struct with info from the base file. */
238 tmp_stream_name
= smb_fname
->stream_name
;
239 smb_fname
->stream_name
= NULL
;
240 result
= SMB_VFS_NEXT_STAT(handle
, smb_fname
);
241 smb_fname
->stream_name
= tmp_stream_name
;
247 /* Derive the xattr name to lookup. */
248 status
= streams_xattr_get_name(handle
, talloc_tos(),
249 smb_fname
->stream_name
, &xattr_name
);
250 if (!NT_STATUS_IS_OK(status
)) {
251 errno
= map_errno_from_nt_status(status
);
255 /* Augment the base file's stat information before returning. */
257 status
= synthetic_pathref(talloc_tos(),
258 handle
->conn
->cwd_fsp
,
259 smb_fname
->base_name
,
265 if (!NT_STATUS_IS_OK(status
)) {
266 TALLOC_FREE(xattr_name
);
267 SET_STAT_INVALID(smb_fname
->st
);
276 smb_fname
->st
.st_ex_size
= get_xattr_size_fsp(fsp
,
278 if (smb_fname
->st
.st_ex_size
== -1) {
279 TALLOC_FREE(xattr_name
);
280 TALLOC_FREE(pathref
);
281 SET_STAT_INVALID(smb_fname
->st
);
286 smb_fname
->st
.st_ex_ino
= hash_inode(&smb_fname
->st
, xattr_name
);
287 smb_fname
->st
.st_ex_mode
&= ~S_IFMT
;
288 smb_fname
->st
.st_ex_mode
|= S_IFREG
;
289 smb_fname
->st
.st_ex_blocks
=
290 smb_fname
->st
.st_ex_size
/ STAT_ST_BLOCKSIZE
+ 1;
292 TALLOC_FREE(xattr_name
);
293 TALLOC_FREE(pathref
);
297 static int streams_xattr_lstat(vfs_handle_struct
*handle
,
298 struct smb_filename
*smb_fname
)
300 if (is_named_stream(smb_fname
)) {
302 * There can never be EA's on a symlink.
303 * Windows will never see a symlink, and
304 * in SMB_FILENAME_POSIX_PATH mode we don't
305 * allow EA's on a symlink.
307 SET_STAT_INVALID(smb_fname
->st
);
311 return SMB_VFS_NEXT_LSTAT(handle
, smb_fname
);
314 static int streams_xattr_openat(struct vfs_handle_struct
*handle
,
315 const struct files_struct
*dirfsp
,
316 const struct smb_filename
*smb_fname
,
318 const struct vfs_open_how
*how
)
321 struct streams_xattr_config
*config
= NULL
;
322 struct stream_io
*sio
= NULL
;
324 char *xattr_name
= NULL
;
326 bool set_empty_xattr
= false;
329 SMB_VFS_HANDLE_GET_DATA(handle
, config
, struct streams_xattr_config
,
332 DBG_DEBUG("called for %s with flags 0x%x\n",
333 smb_fname_str_dbg(smb_fname
),
336 if (!is_named_stream(smb_fname
)) {
337 return SMB_VFS_NEXT_OPENAT(handle
,
344 if (how
->resolve
!= 0) {
349 SMB_ASSERT(fsp_is_alternate_stream(fsp
));
350 SMB_ASSERT(dirfsp
== NULL
);
352 status
= streams_xattr_get_name(handle
, talloc_tos(),
353 smb_fname
->stream_name
, &xattr_name
);
354 if (!NT_STATUS_IS_OK(status
)) {
355 errno
= map_errno_from_nt_status(status
);
359 status
= get_ea_value_fsp(talloc_tos(),
364 DBG_DEBUG("get_ea_value_fsp returned %s\n", nt_errstr(status
));
366 if (!NT_STATUS_IS_OK(status
)) {
367 if (!NT_STATUS_EQUAL(status
, NT_STATUS_NOT_FOUND
)) {
369 * The base file is not there. This is an error even if
370 * we got O_CREAT, the higher levels should have created
371 * the base file for us.
373 DBG_DEBUG("streams_xattr_open: base file %s not around, "
374 "returning ENOENT\n", smb_fname
->base_name
);
379 if (!(how
->flags
& O_CREAT
)) {
384 set_empty_xattr
= true;
387 if (how
->flags
& O_TRUNC
) {
388 set_empty_xattr
= true;
391 if (set_empty_xattr
) {
393 * The attribute does not exist or needs to be truncated
397 * Darn, xattrs need at least 1 byte
401 DEBUG(10, ("creating or truncating attribute %s on file %s\n",
402 xattr_name
, smb_fname
->base_name
));
404 ret
= SMB_VFS_FSETXATTR(fsp
->base_fsp
,
407 how
->flags
& O_EXCL
? XATTR_CREATE
: 0);
413 fakefd
= vfs_fake_fd();
415 sio
= VFS_ADD_FSP_EXTENSION(handle
, fsp
, struct stream_io
, NULL
);
421 sio
->xattr_name
= talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle
, fsp
),
423 if (sio
->xattr_name
== NULL
) {
429 * so->base needs to be a copy of fsp->fsp_name->base_name,
430 * making it identical to streams_xattr_recheck(). If the
431 * open is changing directories, fsp->fsp_name->base_name
432 * will be the full path from the share root, whilst
433 * smb_fname will be relative to the $cwd.
435 sio
->base
= talloc_strdup(VFS_MEMCTX_FSP_EXTENSION(handle
, fsp
),
436 fsp
->fsp_name
->base_name
);
437 if (sio
->base
== NULL
) {
442 sio
->fsp_name_ptr
= fsp
->fsp_name
;
443 sio
->handle
= handle
;
450 vfs_fake_fd_close(fakefd
);
457 static int streams_xattr_close(vfs_handle_struct
*handle
,
463 fd
= fsp_get_pathref_fd(fsp
);
465 DBG_DEBUG("streams_xattr_close called [%s] fd [%d]\n",
466 smb_fname_str_dbg(fsp
->fsp_name
), fd
);
468 if (!fsp_is_alternate_stream(fsp
)) {
469 return SMB_VFS_NEXT_CLOSE(handle
, fsp
);
472 ret
= vfs_fake_fd_close(fd
);
478 static int streams_xattr_unlinkat(vfs_handle_struct
*handle
,
479 struct files_struct
*dirfsp
,
480 const struct smb_filename
*smb_fname
,
485 char *xattr_name
= NULL
;
486 struct smb_filename
*pathref
= NULL
;
487 struct files_struct
*fsp
= smb_fname
->fsp
;
489 if (!is_named_stream(smb_fname
)) {
490 return SMB_VFS_NEXT_UNLINKAT(handle
,
496 /* A stream can never be rmdir'ed */
497 SMB_ASSERT((flags
& AT_REMOVEDIR
) == 0);
499 status
= streams_xattr_get_name(handle
, talloc_tos(),
500 smb_fname
->stream_name
, &xattr_name
);
501 if (!NT_STATUS_IS_OK(status
)) {
502 errno
= map_errno_from_nt_status(status
);
507 status
= synthetic_pathref(talloc_tos(),
508 handle
->conn
->cwd_fsp
,
509 smb_fname
->base_name
,
515 if (!NT_STATUS_IS_OK(status
)) {
521 SMB_ASSERT(fsp_is_alternate_stream(smb_fname
->fsp
));
525 ret
= SMB_VFS_FREMOVEXATTR(fsp
, xattr_name
);
527 if ((ret
== -1) && (errno
== ENOATTR
)) {
535 TALLOC_FREE(xattr_name
);
536 TALLOC_FREE(pathref
);
540 static int streams_xattr_renameat(vfs_handle_struct
*handle
,
541 files_struct
*srcfsp
,
542 const struct smb_filename
*smb_fname_src
,
543 files_struct
*dstfsp
,
544 const struct smb_filename
*smb_fname_dst
)
548 char *src_xattr_name
= NULL
;
549 char *dst_xattr_name
= NULL
;
550 bool src_is_stream
, dst_is_stream
;
554 struct smb_filename
*pathref_src
= NULL
;
555 struct smb_filename
*pathref_dst
= NULL
;
556 struct smb_filename
*full_src
= NULL
;
557 struct smb_filename
*full_dst
= NULL
;
559 src_is_stream
= is_ntfs_stream_smb_fname(smb_fname_src
);
560 dst_is_stream
= is_ntfs_stream_smb_fname(smb_fname_dst
);
562 if (!src_is_stream
&& !dst_is_stream
) {
563 return SMB_VFS_NEXT_RENAMEAT(handle
,
570 /* For now don't allow renames from or to the default stream. */
571 if (is_ntfs_default_stream_smb_fname(smb_fname_src
) ||
572 is_ntfs_default_stream_smb_fname(smb_fname_dst
)) {
577 /* Don't rename if the streams are identical. */
578 if (strcasecmp_m(smb_fname_src
->stream_name
,
579 smb_fname_dst
->stream_name
) == 0) {
583 /* Get the xattr names. */
584 status
= streams_xattr_get_name(handle
, talloc_tos(),
585 smb_fname_src
->stream_name
,
587 if (!NT_STATUS_IS_OK(status
)) {
588 errno
= map_errno_from_nt_status(status
);
591 status
= streams_xattr_get_name(handle
, talloc_tos(),
592 smb_fname_dst
->stream_name
,
594 if (!NT_STATUS_IS_OK(status
)) {
595 errno
= map_errno_from_nt_status(status
);
599 full_src
= full_path_from_dirfsp_atname(talloc_tos(),
602 if (full_src
== NULL
) {
606 full_dst
= full_path_from_dirfsp_atname(talloc_tos(),
609 if (full_dst
== NULL
) {
614 /* Get a pathref for full_src (base file, no stream name). */
615 status
= synthetic_pathref(talloc_tos(),
616 handle
->conn
->cwd_fsp
,
623 if (!NT_STATUS_IS_OK(status
)) {
628 /* Read the old stream from the base file fsp. */
629 status
= get_ea_value_fsp(talloc_tos(),
633 if (!NT_STATUS_IS_OK(status
)) {
634 errno
= map_errno_from_nt_status(status
);
638 /* Get a pathref for full_dst (base file, no stream name). */
639 status
= synthetic_pathref(talloc_tos(),
640 handle
->conn
->cwd_fsp
,
647 if (!NT_STATUS_IS_OK(status
)) {
652 /* (Over)write the new stream on the base file fsp. */
653 nret
= SMB_VFS_FSETXATTR(
660 if (errno
== ENOATTR
) {
667 * Remove the old stream from the base file fsp.
669 oret
= SMB_VFS_FREMOVEXATTR(pathref_src
->fsp
,
672 if (errno
== ENOATTR
) {
682 TALLOC_FREE(pathref_src
);
683 TALLOC_FREE(pathref_dst
);
684 TALLOC_FREE(full_src
);
685 TALLOC_FREE(full_dst
);
686 TALLOC_FREE(src_xattr_name
);
687 TALLOC_FREE(dst_xattr_name
);
691 static NTSTATUS
walk_xattr_streams(vfs_handle_struct
*handle
,
693 const struct smb_filename
*smb_fname
,
694 bool (*fn
)(struct ea_struct
*ea
,
701 struct streams_xattr_config
*config
;
703 SMB_VFS_HANDLE_GET_DATA(handle
, config
, struct streams_xattr_config
,
704 return NT_STATUS_UNSUCCESSFUL
);
706 status
= get_ea_names_from_fsp(talloc_tos(),
710 if (!NT_STATUS_IS_OK(status
)) {
714 for (i
=0; i
<num_names
; i
++) {
718 * We want to check with samba_private_attr_name()
719 * whether the xattr name is a private one,
720 * unfortunately it flags xattrs that begin with the
721 * default streams prefix as private.
723 * By only calling samba_private_attr_name() in case
724 * the xattr does NOT begin with the default prefix,
725 * we know that if it returns 'true' it definitely one
726 * of our internal xattr like "user.DOSATTRIB".
728 if (strncasecmp_m(names
[i
], SAMBA_XATTR_DOSSTREAM_PREFIX
,
729 strlen(SAMBA_XATTR_DOSSTREAM_PREFIX
)) != 0) {
730 if (samba_private_attr_name(names
[i
])) {
735 if (strncmp(names
[i
], config
->prefix
,
736 config
->prefix_len
) != 0) {
740 status
= get_ea_value_fsp(names
,
744 if (!NT_STATUS_IS_OK(status
)) {
745 DEBUG(10, ("Could not get ea %s for file %s: %s\n",
747 smb_fname
->base_name
,
752 ea
.name
= talloc_asprintf(
753 ea
.value
.data
, ":%s%s",
754 names
[i
] + config
->prefix_len
,
755 config
->store_stream_type
? "" : ":$DATA");
756 if (ea
.name
== NULL
) {
757 DEBUG(0, ("talloc failed\n"));
761 if (!fn(&ea
, private_data
)) {
762 TALLOC_FREE(ea
.value
.data
);
766 TALLOC_FREE(ea
.value
.data
);
773 static bool add_one_stream(TALLOC_CTX
*mem_ctx
, unsigned int *num_streams
,
774 struct stream_struct
**streams
,
775 const char *name
, off_t size
,
778 struct stream_struct
*tmp
;
780 tmp
= talloc_realloc(mem_ctx
, *streams
, struct stream_struct
,
786 tmp
[*num_streams
].name
= talloc_strdup(tmp
, name
);
787 if (tmp
[*num_streams
].name
== NULL
) {
791 tmp
[*num_streams
].size
= size
;
792 tmp
[*num_streams
].alloc_size
= alloc_size
;
799 struct streaminfo_state
{
801 vfs_handle_struct
*handle
;
802 unsigned int num_streams
;
803 struct stream_struct
*streams
;
807 static bool collect_one_stream(struct ea_struct
*ea
, void *private_data
)
809 struct streaminfo_state
*state
=
810 (struct streaminfo_state
*)private_data
;
812 if (!add_one_stream(state
->mem_ctx
,
813 &state
->num_streams
, &state
->streams
,
814 ea
->name
, ea
->value
.length
-1,
815 smb_roundup(state
->handle
->conn
,
816 ea
->value
.length
-1))) {
817 state
->status
= NT_STATUS_NO_MEMORY
;
824 static NTSTATUS
streams_xattr_fstreaminfo(vfs_handle_struct
*handle
,
825 struct files_struct
*fsp
,
827 unsigned int *pnum_streams
,
828 struct stream_struct
**pstreams
)
831 struct streaminfo_state state
;
833 state
.streams
= *pstreams
;
834 state
.num_streams
= *pnum_streams
;
835 state
.mem_ctx
= mem_ctx
;
836 state
.handle
= handle
;
837 state
.status
= NT_STATUS_OK
;
839 status
= walk_xattr_streams(handle
,
845 if (!NT_STATUS_IS_OK(status
)) {
846 TALLOC_FREE(state
.streams
);
850 if (!NT_STATUS_IS_OK(state
.status
)) {
851 TALLOC_FREE(state
.streams
);
855 *pnum_streams
= state
.num_streams
;
856 *pstreams
= state
.streams
;
858 return SMB_VFS_NEXT_FSTREAMINFO(handle
,
865 static uint32_t streams_xattr_fs_capabilities(struct vfs_handle_struct
*handle
,
866 enum timestamp_set_resolution
*p_ts_res
)
868 return SMB_VFS_NEXT_FS_CAPABILITIES(handle
, p_ts_res
) | FILE_NAMED_STREAMS
;
871 static int streams_xattr_connect(vfs_handle_struct
*handle
,
872 const char *service
, const char *user
)
874 struct streams_xattr_config
*config
;
875 const char *default_prefix
= SAMBA_XATTR_DOSSTREAM_PREFIX
;
879 rc
= SMB_VFS_NEXT_CONNECT(handle
, service
, user
);
884 config
= talloc_zero(handle
->conn
, struct streams_xattr_config
);
885 if (config
== NULL
) {
886 DEBUG(1, ("talloc_zero() failed\n"));
891 prefix
= lp_parm_const_string(SNUM(handle
->conn
),
892 "streams_xattr", "prefix",
894 config
->prefix
= talloc_strdup(config
, prefix
);
895 if (config
->prefix
== NULL
) {
896 DEBUG(1, ("talloc_strdup() failed\n"));
900 config
->prefix_len
= strlen(config
->prefix
);
901 DEBUG(10, ("streams_xattr using stream prefix: %s\n", config
->prefix
));
903 config
->store_stream_type
= lp_parm_bool(SNUM(handle
->conn
),
908 SMB_VFS_HANDLE_SET_DATA(handle
, config
,
909 NULL
, struct stream_xattr_config
,
915 static ssize_t
streams_xattr_pwrite(vfs_handle_struct
*handle
,
916 files_struct
*fsp
, const void *data
,
917 size_t n
, off_t offset
)
919 struct stream_io
*sio
=
920 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
925 DEBUG(10, ("streams_xattr_pwrite called for %d bytes\n", (int)n
));
928 return SMB_VFS_NEXT_PWRITE(handle
, fsp
, data
, n
, offset
);
931 if (!streams_xattr_recheck(sio
)) {
935 if ((offset
+ n
) >= lp_smbd_max_xattr_size(SNUM(handle
->conn
))) {
937 * Requested write is beyond what can be read based on
938 * samba configuration.
939 * ReFS returns STATUS_FILESYSTEM_LIMITATION, which causes
940 * entire file to be skipped by File Explorer. VFAT returns
941 * NT_STATUS_OBJECT_NAME_COLLISION causes user to be prompted
942 * to skip writing metadata, but copy data.
944 DBG_ERR("Write to xattr [%s] on file [%s] exceeds maximum "
945 "supported extended attribute size. "
946 "Depending on filesystem type and operating system "
947 "(OS) specifics, this value may be increased using "
948 "the value of the parameter: "
949 "smbd max xattr size = <bytes>. Consult OS and "
950 "filesystem manpages prior to increasing this limit.\n",
951 sio
->xattr_name
, sio
->base
);
956 status
= get_ea_value_fsp(talloc_tos(),
960 if (!NT_STATUS_IS_OK(status
)) {
964 if ((offset
+ n
) > ea
.value
.length
-1) {
967 tmp
= talloc_realloc(talloc_tos(), ea
.value
.data
, uint8_t,
971 TALLOC_FREE(ea
.value
.data
);
976 ea
.value
.length
= offset
+ n
+ 1;
977 ea
.value
.data
[offset
+n
] = 0;
980 memcpy(ea
.value
.data
+ offset
, data
, n
);
982 ret
= SMB_VFS_FSETXATTR(fsp
->base_fsp
,
987 TALLOC_FREE(ea
.value
.data
);
996 static ssize_t
streams_xattr_pread(vfs_handle_struct
*handle
,
997 files_struct
*fsp
, void *data
,
998 size_t n
, off_t offset
)
1000 struct stream_io
*sio
=
1001 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
1002 struct ea_struct ea
;
1004 size_t length
, overlap
;
1006 DEBUG(10, ("streams_xattr_pread: offset=%d, size=%d\n",
1007 (int)offset
, (int)n
));
1010 return SMB_VFS_NEXT_PREAD(handle
, fsp
, data
, n
, offset
);
1013 if (!streams_xattr_recheck(sio
)) {
1017 status
= get_ea_value_fsp(talloc_tos(),
1021 if (!NT_STATUS_IS_OK(status
)) {
1025 length
= ea
.value
.length
-1;
1027 DBG_DEBUG("get_ea_value_fsp returned %d bytes\n",
1030 /* Attempt to read past EOF. */
1031 if (length
<= offset
) {
1035 overlap
= (offset
+ n
) > length
? (length
- offset
) : n
;
1036 memcpy(data
, ea
.value
.data
+ offset
, overlap
);
1038 TALLOC_FREE(ea
.value
.data
);
1042 struct streams_xattr_pread_state
{
1044 struct vfs_aio_state vfs_aio_state
;
1047 static void streams_xattr_pread_done(struct tevent_req
*subreq
);
1049 static struct tevent_req
*streams_xattr_pread_send(
1050 struct vfs_handle_struct
*handle
,
1051 TALLOC_CTX
*mem_ctx
,
1052 struct tevent_context
*ev
,
1053 struct files_struct
*fsp
,
1055 size_t n
, off_t offset
)
1057 struct tevent_req
*req
= NULL
;
1058 struct tevent_req
*subreq
= NULL
;
1059 struct streams_xattr_pread_state
*state
= NULL
;
1060 struct stream_io
*sio
=
1061 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
1063 req
= tevent_req_create(mem_ctx
, &state
,
1064 struct streams_xattr_pread_state
);
1070 subreq
= SMB_VFS_NEXT_PREAD_SEND(state
, ev
, handle
, fsp
,
1072 if (tevent_req_nomem(req
, subreq
)) {
1073 return tevent_req_post(req
, ev
);
1075 tevent_req_set_callback(subreq
, streams_xattr_pread_done
, req
);
1079 state
->nread
= SMB_VFS_PREAD(fsp
, data
, n
, offset
);
1080 if (state
->nread
!= n
) {
1081 if (state
->nread
!= -1) {
1084 tevent_req_error(req
, errno
);
1085 return tevent_req_post(req
, ev
);
1088 tevent_req_done(req
);
1089 return tevent_req_post(req
, ev
);
1092 static void streams_xattr_pread_done(struct tevent_req
*subreq
)
1094 struct tevent_req
*req
= tevent_req_callback_data(
1095 subreq
, struct tevent_req
);
1096 struct streams_xattr_pread_state
*state
= tevent_req_data(
1097 req
, struct streams_xattr_pread_state
);
1099 state
->nread
= SMB_VFS_PREAD_RECV(subreq
, &state
->vfs_aio_state
);
1100 TALLOC_FREE(subreq
);
1102 if (tevent_req_error(req
, state
->vfs_aio_state
.error
)) {
1105 tevent_req_done(req
);
1108 static ssize_t
streams_xattr_pread_recv(struct tevent_req
*req
,
1109 struct vfs_aio_state
*vfs_aio_state
)
1111 struct streams_xattr_pread_state
*state
= tevent_req_data(
1112 req
, struct streams_xattr_pread_state
);
1114 if (tevent_req_is_unix_error(req
, &vfs_aio_state
->error
)) {
1118 *vfs_aio_state
= state
->vfs_aio_state
;
1119 return state
->nread
;
1122 struct streams_xattr_pwrite_state
{
1124 struct vfs_aio_state vfs_aio_state
;
1127 static void streams_xattr_pwrite_done(struct tevent_req
*subreq
);
1129 static struct tevent_req
*streams_xattr_pwrite_send(
1130 struct vfs_handle_struct
*handle
,
1131 TALLOC_CTX
*mem_ctx
,
1132 struct tevent_context
*ev
,
1133 struct files_struct
*fsp
,
1135 size_t n
, off_t offset
)
1137 struct tevent_req
*req
= NULL
;
1138 struct tevent_req
*subreq
= NULL
;
1139 struct streams_xattr_pwrite_state
*state
= NULL
;
1140 struct stream_io
*sio
=
1141 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
1143 req
= tevent_req_create(mem_ctx
, &state
,
1144 struct streams_xattr_pwrite_state
);
1150 subreq
= SMB_VFS_NEXT_PWRITE_SEND(state
, ev
, handle
, fsp
,
1152 if (tevent_req_nomem(req
, subreq
)) {
1153 return tevent_req_post(req
, ev
);
1155 tevent_req_set_callback(subreq
, streams_xattr_pwrite_done
, req
);
1159 state
->nwritten
= SMB_VFS_PWRITE(fsp
, data
, n
, offset
);
1160 if (state
->nwritten
!= n
) {
1161 if (state
->nwritten
!= -1) {
1164 tevent_req_error(req
, errno
);
1165 return tevent_req_post(req
, ev
);
1168 tevent_req_done(req
);
1169 return tevent_req_post(req
, ev
);
1172 static void streams_xattr_pwrite_done(struct tevent_req
*subreq
)
1174 struct tevent_req
*req
= tevent_req_callback_data(
1175 subreq
, struct tevent_req
);
1176 struct streams_xattr_pwrite_state
*state
= tevent_req_data(
1177 req
, struct streams_xattr_pwrite_state
);
1179 state
->nwritten
= SMB_VFS_PWRITE_RECV(subreq
, &state
->vfs_aio_state
);
1180 TALLOC_FREE(subreq
);
1182 if (tevent_req_error(req
, state
->vfs_aio_state
.error
)) {
1185 tevent_req_done(req
);
1188 static ssize_t
streams_xattr_pwrite_recv(struct tevent_req
*req
,
1189 struct vfs_aio_state
*vfs_aio_state
)
1191 struct streams_xattr_pwrite_state
*state
= tevent_req_data(
1192 req
, struct streams_xattr_pwrite_state
);
1194 if (tevent_req_is_unix_error(req
, &vfs_aio_state
->error
)) {
1198 *vfs_aio_state
= state
->vfs_aio_state
;
1199 return state
->nwritten
;
1202 static int streams_xattr_ftruncate(struct vfs_handle_struct
*handle
,
1203 struct files_struct
*fsp
,
1208 struct ea_struct ea
;
1210 struct stream_io
*sio
=
1211 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
1213 DEBUG(10, ("streams_xattr_ftruncate called for file %s offset %.0f\n",
1214 fsp_str_dbg(fsp
), (double)offset
));
1217 return SMB_VFS_NEXT_FTRUNCATE(handle
, fsp
, offset
);
1220 if (!streams_xattr_recheck(sio
)) {
1224 status
= get_ea_value_fsp(talloc_tos(),
1228 if (!NT_STATUS_IS_OK(status
)) {
1232 tmp
= talloc_realloc(talloc_tos(), ea
.value
.data
, uint8_t,
1236 TALLOC_FREE(ea
.value
.data
);
1241 /* Did we expand ? */
1242 if (ea
.value
.length
< offset
+ 1) {
1243 memset(&tmp
[ea
.value
.length
], '\0',
1244 offset
+ 1 - ea
.value
.length
);
1247 ea
.value
.data
= tmp
;
1248 ea
.value
.length
= offset
+ 1;
1249 ea
.value
.data
[offset
] = 0;
1251 ret
= SMB_VFS_FSETXATTR(fsp
->base_fsp
,
1257 TALLOC_FREE(ea
.value
.data
);
1266 static int streams_xattr_fallocate(struct vfs_handle_struct
*handle
,
1267 struct files_struct
*fsp
,
1272 struct stream_io
*sio
=
1273 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
1275 DEBUG(10, ("streams_xattr_fallocate called for file %s offset %.0f"
1277 fsp_str_dbg(fsp
), (double)offset
, (double)len
));
1280 return SMB_VFS_NEXT_FALLOCATE(handle
, fsp
, mode
, offset
, len
);
1283 if (!streams_xattr_recheck(sio
)) {
1287 /* Let the pwrite code path handle it. */
1292 static int streams_xattr_fchown(vfs_handle_struct
*handle
, files_struct
*fsp
,
1293 uid_t uid
, gid_t gid
)
1295 struct stream_io
*sio
=
1296 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
1299 return SMB_VFS_NEXT_FCHOWN(handle
, fsp
, uid
, gid
);
1305 static int streams_xattr_fchmod(vfs_handle_struct
*handle
,
1309 struct stream_io
*sio
=
1310 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
1313 return SMB_VFS_NEXT_FCHMOD(handle
, fsp
, mode
);
1319 static ssize_t
streams_xattr_fgetxattr(struct vfs_handle_struct
*handle
,
1320 struct files_struct
*fsp
,
1325 struct stream_io
*sio
=
1326 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
1329 return SMB_VFS_NEXT_FGETXATTR(handle
, fsp
, name
, value
, size
);
1336 static ssize_t
streams_xattr_flistxattr(struct vfs_handle_struct
*handle
,
1337 struct files_struct
*fsp
,
1341 struct stream_io
*sio
=
1342 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
1345 return SMB_VFS_NEXT_FLISTXATTR(handle
, fsp
, list
, size
);
1352 static int streams_xattr_fremovexattr(struct vfs_handle_struct
*handle
,
1353 struct files_struct
*fsp
,
1356 struct stream_io
*sio
=
1357 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
1360 return SMB_VFS_NEXT_FREMOVEXATTR(handle
, fsp
, name
);
1367 static int streams_xattr_fsetxattr(struct vfs_handle_struct
*handle
,
1368 struct files_struct
*fsp
,
1374 struct stream_io
*sio
=
1375 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
1378 return SMB_VFS_NEXT_FSETXATTR(handle
, fsp
, name
, value
,
1386 struct streams_xattr_fsync_state
{
1388 struct vfs_aio_state vfs_aio_state
;
1391 static void streams_xattr_fsync_done(struct tevent_req
*subreq
);
1393 static struct tevent_req
*streams_xattr_fsync_send(
1394 struct vfs_handle_struct
*handle
,
1395 TALLOC_CTX
*mem_ctx
,
1396 struct tevent_context
*ev
,
1397 struct files_struct
*fsp
)
1399 struct tevent_req
*req
= NULL
;
1400 struct tevent_req
*subreq
= NULL
;
1401 struct streams_xattr_fsync_state
*state
= NULL
;
1402 struct stream_io
*sio
=
1403 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
1405 req
= tevent_req_create(mem_ctx
, &state
,
1406 struct streams_xattr_fsync_state
);
1412 subreq
= SMB_VFS_NEXT_FSYNC_SEND(state
, ev
, handle
, fsp
);
1413 if (tevent_req_nomem(req
, subreq
)) {
1414 return tevent_req_post(req
, ev
);
1416 tevent_req_set_callback(subreq
, streams_xattr_fsync_done
, req
);
1421 * There's no pathname based sync variant and we don't have access to
1422 * the basefile handle, so we can't do anything here.
1425 tevent_req_done(req
);
1426 return tevent_req_post(req
, ev
);
1429 static void streams_xattr_fsync_done(struct tevent_req
*subreq
)
1431 struct tevent_req
*req
= tevent_req_callback_data(
1432 subreq
, struct tevent_req
);
1433 struct streams_xattr_fsync_state
*state
= tevent_req_data(
1434 req
, struct streams_xattr_fsync_state
);
1436 state
->ret
= SMB_VFS_FSYNC_RECV(subreq
, &state
->vfs_aio_state
);
1437 TALLOC_FREE(subreq
);
1438 if (state
->ret
!= 0) {
1439 tevent_req_error(req
, errno
);
1443 tevent_req_done(req
);
1446 static int streams_xattr_fsync_recv(struct tevent_req
*req
,
1447 struct vfs_aio_state
*vfs_aio_state
)
1449 struct streams_xattr_fsync_state
*state
= tevent_req_data(
1450 req
, struct streams_xattr_fsync_state
);
1452 if (tevent_req_is_unix_error(req
, &vfs_aio_state
->error
)) {
1456 *vfs_aio_state
= state
->vfs_aio_state
;
1460 static bool streams_xattr_lock(vfs_handle_struct
*handle
,
1467 struct stream_io
*sio
=
1468 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
1471 return SMB_VFS_NEXT_LOCK(handle
, fsp
, op
, offset
, count
, type
);
1477 static bool streams_xattr_getlock(vfs_handle_struct
*handle
,
1484 struct stream_io
*sio
=
1485 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
1488 return SMB_VFS_NEXT_GETLOCK(handle
, fsp
, poffset
,
1489 pcount
, ptype
, ppid
);
1496 static int streams_xattr_filesystem_sharemode(vfs_handle_struct
*handle
,
1498 uint32_t share_access
,
1499 uint32_t access_mask
)
1501 struct stream_io
*sio
=
1502 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
1505 return SMB_VFS_NEXT_FILESYSTEM_SHAREMODE(handle
,
1514 static int streams_xattr_linux_setlease(vfs_handle_struct
*handle
,
1518 struct stream_io
*sio
=
1519 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
1522 return SMB_VFS_NEXT_LINUX_SETLEASE(handle
, fsp
, leasetype
);
1528 static bool streams_xattr_strict_lock_check(struct vfs_handle_struct
*handle
,
1530 struct lock_struct
*plock
)
1532 struct stream_io
*sio
=
1533 (struct stream_io
*)VFS_FETCH_FSP_EXTENSION(handle
, fsp
);
1536 return SMB_VFS_NEXT_STRICT_LOCK_CHECK(handle
, fsp
, plock
);
1542 static int streams_xattr_fcntl(vfs_handle_struct
*handle
,
1547 va_list dup_cmd_arg
;
1551 if (fsp_is_alternate_stream(fsp
)) {
1557 DBG_ERR("Unsupported fcntl() cmd [%d] on [%s]\n",
1558 cmd
, fsp_str_dbg(fsp
));
1564 va_copy(dup_cmd_arg
, cmd_arg
);
1565 arg
= va_arg(dup_cmd_arg
, void *);
1567 ret
= SMB_VFS_NEXT_FCNTL(handle
, fsp
, cmd
, arg
);
1569 va_end(dup_cmd_arg
);
1574 static struct vfs_fn_pointers vfs_streams_xattr_fns
= {
1575 .fs_capabilities_fn
= streams_xattr_fs_capabilities
,
1576 .connect_fn
= streams_xattr_connect
,
1577 .openat_fn
= streams_xattr_openat
,
1578 .close_fn
= streams_xattr_close
,
1579 .stat_fn
= streams_xattr_stat
,
1580 .fstat_fn
= streams_xattr_fstat
,
1581 .lstat_fn
= streams_xattr_lstat
,
1582 .pread_fn
= streams_xattr_pread
,
1583 .pwrite_fn
= streams_xattr_pwrite
,
1584 .pread_send_fn
= streams_xattr_pread_send
,
1585 .pread_recv_fn
= streams_xattr_pread_recv
,
1586 .pwrite_send_fn
= streams_xattr_pwrite_send
,
1587 .pwrite_recv_fn
= streams_xattr_pwrite_recv
,
1588 .unlinkat_fn
= streams_xattr_unlinkat
,
1589 .renameat_fn
= streams_xattr_renameat
,
1590 .ftruncate_fn
= streams_xattr_ftruncate
,
1591 .fallocate_fn
= streams_xattr_fallocate
,
1592 .fstreaminfo_fn
= streams_xattr_fstreaminfo
,
1594 .fsync_send_fn
= streams_xattr_fsync_send
,
1595 .fsync_recv_fn
= streams_xattr_fsync_recv
,
1597 .lock_fn
= streams_xattr_lock
,
1598 .getlock_fn
= streams_xattr_getlock
,
1599 .filesystem_sharemode_fn
= streams_xattr_filesystem_sharemode
,
1600 .linux_setlease_fn
= streams_xattr_linux_setlease
,
1601 .strict_lock_check_fn
= streams_xattr_strict_lock_check
,
1602 .fcntl_fn
= streams_xattr_fcntl
,
1604 .fchown_fn
= streams_xattr_fchown
,
1605 .fchmod_fn
= streams_xattr_fchmod
,
1607 .fgetxattr_fn
= streams_xattr_fgetxattr
,
1608 .flistxattr_fn
= streams_xattr_flistxattr
,
1609 .fremovexattr_fn
= streams_xattr_fremovexattr
,
1610 .fsetxattr_fn
= streams_xattr_fsetxattr
,
1614 NTSTATUS
vfs_streams_xattr_init(TALLOC_CTX
*ctx
)
1616 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION
, "streams_xattr",
1617 &vfs_streams_xattr_fns
);