2 Unix SMB/CIFS implementation.
3 filename handling routines
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 1999-2007
6 Copyright (C) Ying Chen 2000
7 Copyright (C) Volker Lendecke 2007
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 * New hash table stat cache code added by Ying Chen.
28 #include "system/filesys.h"
29 #include "fake_file.h"
30 #include "smbd/smbd.h"
31 #include "smbd/globals.h"
32 #include "lib/util/memcache.h"
33 #include "libcli/smb/reparse.h"
35 uint32_t ucf_flags_from_smb_request(struct smb_request
*req
)
37 uint32_t ucf_flags
= 0;
43 if (req
->posix_pathnames
) {
44 ucf_flags
|= UCF_POSIX_PATHNAMES
;
46 if (!req
->sconn
->using_smb2
) {
47 ucf_flags
|= UCF_LCOMP_LNK_OK
;
50 if (req
->flags2
& FLAGS2_DFS_PATHNAMES
) {
51 ucf_flags
|= UCF_DFS_PATHNAME
;
53 if (req
->flags2
& FLAGS2_REPARSE_PATH
) {
54 ucf_flags
|= UCF_GMT_PATHNAME
;
60 uint32_t filename_create_ucf_flags(struct smb_request
*req
, uint32_t create_disposition
)
62 uint32_t ucf_flags
= 0;
64 ucf_flags
|= ucf_flags_from_smb_request(req
);
66 switch (create_disposition
) {
73 case FILE_OVERWRITE_IF
:
74 ucf_flags
|= UCF_PREP_CREATEFILE
;
81 /****************************************************************************
82 Mangle the 2nd name and check if it is then equal to the first name.
83 ****************************************************************************/
85 static bool mangled_equal(const char *name1
,
87 const struct share_params
*p
)
91 if (!name_to_8_3(name2
, mname
, False
, p
)) {
94 return strequal(name1
, mname
);
98 * Strip a valid @GMT-token from any incoming filename path,
99 * adding any NTTIME encoded in the pathname into the
100 * twrp field of the passed in smb_fname.
102 * Valid @GMT-tokens look like @GMT-YYYY-MM-DD-HH-MM-SS
103 * at the *start* of a pathname component.
105 * If twrp is passed in then smb_fname->twrp is set to that
106 * value, and the @GMT-token part of the filename is removed
107 * and does not change the stored smb_fname->twrp.
111 NTSTATUS
canonicalize_snapshot_path(struct smb_filename
*smb_fname
,
118 smb_fname
->twrp
= twrp
;
121 if (!(ucf_flags
& UCF_GMT_PATHNAME
)) {
125 found
= extract_snapshot_token(smb_fname
->base_name
, &twrp
);
130 if (smb_fname
->twrp
== 0) {
131 smb_fname
->twrp
= twrp
;
137 static bool strnorm(char *s
, int case_default
)
139 if (case_default
== CASE_UPPER
)
140 return strupper_m(s
);
142 return strlower_m(s
);
146 * Utility function to normalize case on an incoming client filename
147 * if required on this connection struct.
148 * Performs an in-place case conversion guaranteed to stay the same size.
151 static NTSTATUS
normalize_filename_case(connection_struct
*conn
,
157 if (ucf_flags
& UCF_POSIX_PATHNAMES
) {
159 * POSIX never normalizes filename case.
163 if (!conn
->case_sensitive
) {
166 if (conn
->case_preserve
) {
169 if (conn
->short_case_preserve
) {
172 ok
= strnorm(filename
, lp_default_case(SNUM(conn
)));
174 return NT_STATUS_INVALID_PARAMETER
;
179 /****************************************************************************
180 Check if two filenames are equal.
181 This needs to be careful about whether we are case sensitive.
182 ****************************************************************************/
184 static bool fname_equal(const char *name1
, const char *name2
,
187 /* Normal filename handling */
188 if (case_sensitive
) {
189 return(strcmp(name1
,name2
) == 0);
192 return(strequal(name1
,name2
));
195 static bool sname_equal(const char *name1
, const char *name2
,
199 const char *s1
= NULL
;
200 const char *s2
= NULL
;
203 const char *e1
= NULL
;
204 const char *e2
= NULL
;
208 match
= fname_equal(name1
, name2
, case_sensitive
);
213 if (name1
[0] != ':') {
216 if (name2
[0] != ':') {
220 e1
= strchr(s1
, ':');
224 n1
= PTR_DIFF(e1
, s1
);
227 e2
= strchr(s2
, ':');
231 n2
= PTR_DIFF(e2
, s2
);
234 /* Normal filename handling */
235 if (case_sensitive
) {
236 return (strncmp(s1
, s2
, n1
) == 0);
240 * We can't use strnequal() here
241 * as it takes the number of codepoints
242 * and not the number of bytes.
244 * So we make a copy before calling
247 * Note that we TALLOC_FREE() in reverse order
248 * in order to avoid memory fragmentation.
251 c1
= talloc_strndup(talloc_tos(), s1
, n1
);
252 c2
= talloc_strndup(talloc_tos(), s2
, n2
);
253 if (c1
== NULL
|| c2
== NULL
) {
256 return (strncmp(s1
, s2
, n1
) == 0);
259 match
= strequal(c1
, c2
);
265 /****************************************************************************
266 Scan a directory to find a filename, matching without case sensitivity.
267 If the name looks like a mangled name then try via the mangling functions
268 ****************************************************************************/
270 NTSTATUS
get_real_filename_full_scan_at(struct files_struct
*dirfsp
,
276 struct connection_struct
*conn
= dirfsp
->conn
;
277 struct smb_Dir
*cur_dir
= NULL
;
278 const char *dname
= NULL
;
279 char *talloced
= NULL
;
280 char *unmangled_name
= NULL
;
283 /* If we have a case-sensitive filesystem, it doesn't do us any
284 * good to search for a name. If a case variation of the name was
285 * there, then the original stat(2) would have found it.
287 if (!mangled
&& !(conn
->fs_capabilities
& FILE_CASE_SENSITIVE_SEARCH
)) {
288 return NT_STATUS_OBJECT_NAME_NOT_FOUND
;
292 * The incoming name can be mangled, and if we de-mangle it
293 * here it will not compare correctly against the filename (name2)
294 * read from the directory and then mangled by the name_to_8_3()
295 * call. We need to mangle both names or neither.
298 * Fix for bug found by Dina Fine. If in case sensitive mode then
299 * the mangle cache is no good (3 letter extension could be wrong
300 * case - so don't demangle in this case - leave as mangled and
301 * allow the mangling of the directory entry read (which is done
302 * case insensitively) to match instead. This will lead to more
303 * false positive matches but we fail completely without it. JRA.
306 if (mangled
&& !conn
->case_sensitive
) {
307 mangled
= !mangle_lookup_name_from_8_3(talloc_tos(), name
,
311 /* Name is now unmangled. */
312 name
= unmangled_name
;
316 /* open the directory */
317 status
= OpenDir_from_pathref(talloc_tos(), dirfsp
, NULL
, 0, &cur_dir
);
318 if (!NT_STATUS_IS_OK(status
)) {
319 DBG_NOTICE("scan dir didn't open dir [%s]: %s\n",
322 TALLOC_FREE(unmangled_name
);
326 /* now scan for matching names */
327 while ((dname
= ReadDirName(cur_dir
, &talloced
))) {
329 /* Is it dot or dot dot. */
330 if (ISDOT(dname
) || ISDOTDOT(dname
)) {
331 TALLOC_FREE(talloced
);
336 * At this point dname is the unmangled name.
337 * name is either mangled or not, depending on the state
338 * of the "mangled" variable. JRA.
342 * Check mangled name against mangled name, or unmangled name
343 * against unmangled name.
346 if ((mangled
&& mangled_equal(name
,dname
,conn
->params
)) ||
347 fname_equal(name
, dname
, conn
->case_sensitive
)) {
348 /* we've found the file, change it's name and return */
349 *found_name
= talloc_strdup(mem_ctx
, dname
);
350 TALLOC_FREE(unmangled_name
);
351 TALLOC_FREE(cur_dir
);
353 TALLOC_FREE(talloced
);
354 return NT_STATUS_NO_MEMORY
;
356 TALLOC_FREE(talloced
);
359 TALLOC_FREE(talloced
);
362 TALLOC_FREE(unmangled_name
);
363 TALLOC_FREE(cur_dir
);
364 return NT_STATUS_OBJECT_NAME_NOT_FOUND
;
367 /****************************************************************************
368 Wrapper around the vfs get_real_filename and the full directory scan
370 ****************************************************************************/
372 NTSTATUS
get_real_filename_at(struct files_struct
*dirfsp
,
377 struct connection_struct
*conn
= dirfsp
->conn
;
381 mangled
= mangle_is_mangled(name
, conn
->params
);
384 status
= get_real_filename_full_scan_at(
385 dirfsp
, name
, mangled
, mem_ctx
, found_name
);
389 /* Try the vfs first to take advantage of case-insensitive stat. */
390 status
= SMB_VFS_GET_REAL_FILENAME_AT(
391 dirfsp
->conn
, dirfsp
, name
, mem_ctx
, found_name
);
394 * If the case-insensitive stat was successful, or returned an error
395 * other than EOPNOTSUPP then there is no need to fall back on the
396 * full directory scan.
398 if (NT_STATUS_IS_OK(status
) ||
399 !NT_STATUS_EQUAL(status
, NT_STATUS_NOT_SUPPORTED
)) {
403 status
= get_real_filename_full_scan_at(
404 dirfsp
, name
, mangled
, mem_ctx
, found_name
);
409 * Create the memcache-key for GETREALFILENAME_CACHE: This supplements
410 * the stat cache for the last component to be looked up. Cache
411 * contents is the correctly capitalized translation of the parameter
412 * "name" as it exists on disk. This is indexed by inode of the dirfsp
413 * and name, and contrary to stat_cahce_lookup() it does not
414 * vfs_stat() the last component. This will be taken care of by an
415 * attempt to do a openat_pathref_fsp().
417 bool get_real_filename_cache_key(TALLOC_CTX
*mem_ctx
,
418 struct files_struct
*dirfsp
,
422 struct file_id fid
= vfs_file_id_from_sbuf(
423 dirfsp
->conn
, &dirfsp
->fsp_name
->st
);
426 size_t namelen
, keylen
;
428 upper
= talloc_strdup_upper(mem_ctx
, name
);
432 namelen
= talloc_get_size(upper
);
434 keylen
= namelen
+ sizeof(fid
);
435 if (keylen
< sizeof(fid
)) {
440 key
= talloc_size(mem_ctx
, keylen
);
446 memcpy(key
, &fid
, sizeof(fid
));
447 memcpy(key
+ sizeof(fid
), upper
, namelen
);
450 *_key
= (DATA_BLOB
) { .data
= key
, .length
= keylen
, };
455 * Lightweight function to just get last component
456 * for rename / enumerate directory calls.
459 char *get_original_lcomp(TALLOC_CTX
*ctx
,
460 connection_struct
*conn
,
461 const char *filename_in
,
464 char *last_slash
= NULL
;
468 last_slash
= strrchr(filename_in
, '/');
469 if (last_slash
!= NULL
) {
470 orig_lcomp
= talloc_strdup(ctx
, last_slash
+1);
472 orig_lcomp
= talloc_strdup(ctx
, filename_in
);
474 if (orig_lcomp
== NULL
) {
477 status
= normalize_filename_case(conn
, orig_lcomp
, ucf_flags
);
478 if (!NT_STATUS_IS_OK(status
)) {
479 TALLOC_FREE(orig_lcomp
);
486 * Get the correct capitalized stream name hanging off
487 * base_fsp. Equivalent of get_real_filename(), but for streams.
489 static NTSTATUS
get_real_stream_name(
491 struct files_struct
*base_fsp
,
492 const char *stream_name
,
495 unsigned int i
, num_streams
= 0;
496 struct stream_struct
*streams
= NULL
;
499 status
= vfs_fstreaminfo(
500 base_fsp
, talloc_tos(), &num_streams
, &streams
);
501 if (!NT_STATUS_IS_OK(status
)) {
505 for (i
=0; i
<num_streams
; i
++) {
506 bool equal
= sname_equal(stream_name
, streams
[i
].name
, false);
508 DBG_DEBUG("comparing [%s] and [%s]: %sequal\n",
511 equal
? "" : "not ");
514 *_found
= talloc_move(mem_ctx
, &streams
[i
].name
);
515 TALLOC_FREE(streams
);
520 TALLOC_FREE(streams
);
521 return NT_STATUS_OBJECT_NAME_NOT_FOUND
;
524 static bool filename_split_lcomp(
529 const char **_fname_rel
,
530 const char **_streamname
)
532 const char *lcomp
= NULL
;
533 const char *fname_rel
= NULL
;
534 const char *streamname
= NULL
;
535 char *dirname
= NULL
;
537 if (name_in
[0] == '\0') {
539 dirname
= talloc_strdup(mem_ctx
, "");
540 if (dirname
== NULL
) {
546 lcomp
= strrchr_m(name_in
, '/');
549 dirname
= talloc_strndup(mem_ctx
, name_in
, lcomp
- name_in
);
550 if (dirname
== NULL
) {
557 * No slash, dir is empty
559 dirname
= talloc_strdup(mem_ctx
, "");
560 if (dirname
== NULL
) {
564 if (!posix
&& (name_in
[0] == ':')) {
566 * Special case for stream on root directory
569 streamname
= name_in
;
577 streamname
= strchr_m(fname_rel
, ':');
579 if (streamname
!= NULL
) {
580 fname_rel
= talloc_strndup(
583 streamname
- fname_rel
);
584 if (fname_rel
== NULL
) {
585 TALLOC_FREE(dirname
);
593 *_fname_rel
= fname_rel
;
594 *_streamname
= streamname
;
599 * Create the correct capitalization of a file name to be created.
601 static NTSTATUS
filename_convert_normalize_new(
603 struct connection_struct
*conn
,
607 char *name
= name_in
;
611 if (!conn
->case_preserve
||
612 (mangle_is_8_3(name
, false,
614 !conn
->short_case_preserve
)) {
616 char *normalized
= talloc_strdup(mem_ctx
, name
);
617 if (normalized
== NULL
) {
618 return NT_STATUS_NO_MEMORY
;
621 strnorm(normalized
, lp_default_case(SNUM(conn
)));
625 if (mangle_is_mangled(name
, conn
->params
)) {
627 char *unmangled
= NULL
;
629 found
= mangle_lookup_name_from_8_3(
630 mem_ctx
, name
, &unmangled
, conn
->params
);
636 if (name
!= name_in
) {
644 * Open smb_fname_rel->fsp as a pathref fsp with a case insensitive
645 * fallback using GETREALFILENAME_CACHE and get_real_filename_at() if
646 * the first attempt based on the filename sent by the client gives
649 static NTSTATUS
openat_pathref_fsp_case_insensitive(
650 struct files_struct
*dirfsp
,
651 struct smb_filename
*smb_fname_rel
,
654 const bool posix
= (ucf_flags
& UCF_POSIX_PATHNAMES
);
655 DATA_BLOB cache_key
= { .data
= NULL
, };
656 char *found_name
= NULL
;
660 SET_STAT_INVALID(smb_fname_rel
->st
);
662 /* Check veto files - only looks at last component. */
663 if (IS_VETO_PATH(dirfsp
->conn
, smb_fname_rel
->base_name
)) {
664 DBG_DEBUG("veto files rejecting last component %s\n",
665 smb_fname_str_dbg(smb_fname_rel
));
666 return NT_STATUS_NETWORK_OPEN_RESTRICTION
;
669 status
= openat_pathref_fsp(dirfsp
, smb_fname_rel
);
671 if (NT_STATUS_IS_OK(status
)) {
675 if (VALID_STAT(smb_fname_rel
->st
)) {
677 * We got an error although the object existed. Might
678 * be a symlink we don't want.
683 if (!NT_STATUS_EQUAL(status
, NT_STATUS_OBJECT_NAME_NOT_FOUND
)) {
685 * Only retry on ENOENT
690 if (posix
|| dirfsp
->conn
->case_sensitive
) {
692 * Only return case insensitive if required
697 if (lp_stat_cache()) {
698 char *base_name
= smb_fname_rel
->base_name
;
699 char *original_relname
= NULL
;
700 DATA_BLOB value
= { .data
= NULL
};
702 ok
= get_real_filename_cache_key(
703 talloc_tos(), dirfsp
, base_name
, &cache_key
);
706 * probably ENOMEM, just bail
711 DO_PROFILE_INC(statcache_lookups
);
713 ok
= memcache_lookup(
714 NULL
, GETREALFILENAME_CACHE
, cache_key
, &value
);
716 DO_PROFILE_INC(statcache_misses
);
719 DO_PROFILE_INC(statcache_hits
);
722 * For the "new filename" case we need to preserve the
723 * capitalization the client sent us, see
724 * https://bugzilla.samba.org/show_bug.cgi?id=15481
726 original_relname
= smb_fname_rel
->base_name
;
728 smb_fname_rel
->base_name
= talloc_memdup(
729 smb_fname_rel
, value
.data
, value
.length
);
730 if (smb_fname_rel
->base_name
== NULL
) {
731 TALLOC_FREE(cache_key
.data
);
732 return NT_STATUS_NO_MEMORY
;
735 if (IS_VETO_PATH(dirfsp
->conn
, smb_fname_rel
->base_name
)) {
736 DBG_DEBUG("veto files rejecting last component %s\n",
737 smb_fname_str_dbg(smb_fname_rel
));
738 TALLOC_FREE(cache_key
.data
);
739 return NT_STATUS_NETWORK_OPEN_RESTRICTION
;
742 status
= openat_pathref_fsp(dirfsp
, smb_fname_rel
);
743 if (NT_STATUS_IS_OK(status
)) {
744 TALLOC_FREE(cache_key
.data
);
745 TALLOC_FREE(original_relname
);
749 memcache_delete(NULL
, GETREALFILENAME_CACHE
, cache_key
);
750 TALLOC_FREE(smb_fname_rel
->base_name
);
751 smb_fname_rel
->base_name
= original_relname
;
755 status
= get_real_filename_at(
756 dirfsp
, smb_fname_rel
->base_name
, smb_fname_rel
, &found_name
);
757 if (NT_STATUS_EQUAL(status
, NT_STATUS_ACCESS_DENIED
) &&
758 (ucf_flags
& UCF_PREP_CREATEFILE
)) {
762 status
= NT_STATUS_OBJECT_NAME_NOT_FOUND
;
765 if (NT_STATUS_IS_OK(status
)) {
766 TALLOC_FREE(smb_fname_rel
->base_name
);
767 smb_fname_rel
->base_name
= found_name
;
769 if (IS_VETO_PATH(dirfsp
->conn
, smb_fname_rel
->base_name
)) {
770 DBG_DEBUG("veto files rejecting last component %s\n",
771 smb_fname_str_dbg(smb_fname_rel
));
772 return NT_STATUS_NETWORK_OPEN_RESTRICTION
;
775 status
= openat_pathref_fsp(dirfsp
, smb_fname_rel
);
778 if (NT_STATUS_IS_OK(status
) && (cache_key
.data
!= NULL
)) {
780 .data
= (uint8_t *)smb_fname_rel
->base_name
,
781 .length
= strlen(smb_fname_rel
->base_name
) + 1,
784 memcache_add(NULL
, GETREALFILENAME_CACHE
, cache_key
, value
);
787 TALLOC_FREE(cache_key
.data
);
792 static const char *previous_slash(const char *name_in
, const char *slash
)
794 const char *prev
= NULL
;
796 SMB_ASSERT((name_in
<= slash
) && (slash
[0] == '/'));
798 prev
= strchr_m(name_in
, '/');
801 /* No previous slash */
806 const char *next
= strchr_m(prev
+ 1, '/');
814 return NULL
; /* unreachable */
817 static char *symlink_target_path(
820 const char *substitute
,
823 size_t name_in_len
= strlen(name_in
);
824 const char *p_unparsed
= NULL
;
825 const char *parent
= NULL
;
828 SMB_ASSERT(unparsed
<= name_in_len
);
830 p_unparsed
= name_in
+ (name_in_len
- unparsed
);
832 if (substitute
[0] == '/') {
833 ret
= talloc_asprintf(mem_ctx
, "%s%s", substitute
, p_unparsed
);
838 parent
= strrchr_m(name_in
, '/');
840 parent
= previous_slash(name_in
, p_unparsed
);
843 if (parent
== NULL
) {
844 ret
= talloc_asprintf(mem_ctx
, "%s%s", substitute
, p_unparsed
);
846 ret
= talloc_asprintf(mem_ctx
,
848 (int)(parent
- name_in
),
857 static NTSTATUS
safe_symlink_target_path(
859 const char *connectpath
,
861 const char *substitute
,
866 char *abs_target
= NULL
;
867 char *abs_target_canon
= NULL
;
868 const char *relative
= NULL
;
869 char *name_out
= NULL
;
870 NTSTATUS status
= NT_STATUS_NO_MEMORY
;
873 target
= symlink_target_path(mem_ctx
, name_in
, substitute
, unparsed
);
874 if (target
== NULL
) {
878 DBG_DEBUG("name_in: %s, substitute: %s, unparsed: %zu, target=%s\n",
884 if (target
[0] == '/') {
887 abs_target
= talloc_asprintf(
888 target
, "%s/%s", connectpath
, target
);
889 if (abs_target
== NULL
) {
894 abs_target_canon
= canonicalize_absolute_path(target
, abs_target
);
895 if (abs_target_canon
== NULL
) {
899 DBG_DEBUG("abs_target_canon=%s\n", abs_target_canon
);
901 in_share
= subdir_of(
902 connectpath
, strlen(connectpath
), abs_target_canon
, &relative
);
904 DBG_DEBUG("wide link to %s\n", abs_target_canon
);
905 status
= (unparsed
!= 0) ? NT_STATUS_OBJECT_PATH_NOT_FOUND
906 : NT_STATUS_OBJECT_NAME_NOT_FOUND
;
910 name_out
= talloc_strdup(mem_ctx
, relative
);
911 if (name_out
== NULL
) {
915 status
= NT_STATUS_OK
;
916 *_name_out
= name_out
;
923 * Split up name_in as sent by the client into a directory pathref fsp
924 * and a relative smb_filename.
926 static NTSTATUS
filename_convert_dirfsp_nosymlink(
928 connection_struct
*conn
,
932 struct files_struct
**_dirfsp
,
933 struct smb_filename
**_smb_fname
,
934 struct open_symlink_err
**_symlink_err
)
936 struct smb_filename
*smb_dirname
= NULL
;
937 struct smb_filename
*smb_fname_rel
= NULL
;
938 struct smb_filename
*smb_fname
= NULL
;
939 const bool posix
= (ucf_flags
& UCF_POSIX_PATHNAMES
);
940 char *dirname
= NULL
;
941 const char *fname_rel
= NULL
;
942 const char *streamname
= NULL
;
943 char *saved_streamname
= NULL
;
944 struct files_struct
*base_fsp
= NULL
;
946 NTSTATUS status
= NT_STATUS_UNSUCCESSFUL
;
948 SMB_ASSERT(!(ucf_flags
& UCF_DFS_PATHNAME
));
950 if (is_fake_file_path(name_in
)) {
951 smb_fname
= synthetic_smb_fname_split(mem_ctx
, name_in
, posix
);
952 if (smb_fname
== NULL
) {
953 return NT_STATUS_NO_MEMORY
;
955 smb_fname
->st
= (SMB_STRUCT_STAT
){
957 .st_ex_mode
= S_IFREG
| 0644,
959 smb_fname
->st
.st_ex_btime
=
960 (struct timespec
){0, SAMBA_UTIME_OMIT
};
961 smb_fname
->st
.st_ex_atime
=
962 (struct timespec
){0, SAMBA_UTIME_OMIT
};
963 smb_fname
->st
.st_ex_mtime
=
964 (struct timespec
){0, SAMBA_UTIME_OMIT
};
965 smb_fname
->st
.st_ex_ctime
=
966 (struct timespec
){0, SAMBA_UTIME_OMIT
};
968 *_dirfsp
= conn
->cwd_fsp
;
969 *_smb_fname
= smb_fname
;
974 * Catch an invalid path of "." before we
975 * call filename_split_lcomp(). We need to
976 * do this as filename_split_lcomp() will
977 * use "." for the missing relative component
978 * when an empty name_in path is sent by
981 if (ISDOT(name_in
)) {
982 status
= NT_STATUS_OBJECT_NAME_INVALID
;
986 ok
= filename_split_lcomp(
994 status
= NT_STATUS_NO_MEMORY
;
998 if ((streamname
!= NULL
) &&
999 ((conn
->fs_capabilities
& FILE_NAMED_STREAMS
) == 0)) {
1000 status
= NT_STATUS_OBJECT_NAME_INVALID
;
1005 bool name_has_wild
= ms_has_wild(dirname
);
1006 name_has_wild
|= ms_has_wild(fname_rel
);
1007 if (name_has_wild
) {
1008 status
= NT_STATUS_OBJECT_NAME_INVALID
;
1013 if (dirname
[0] == '\0') {
1014 status
= synthetic_pathref(
1021 posix
? SMB_FILENAME_POSIX_PATH
: 0,
1024 struct open_symlink_err
*symlink_err
= NULL
;
1026 status
= normalize_filename_case(conn
, dirname
, ucf_flags
);
1027 if (!NT_STATUS_IS_OK(status
)) {
1028 DBG_ERR("normalize_filename_case %s failed: %s\n",
1034 status
= openat_pathref_fsp_nosymlink(mem_ctx
,
1043 if (NT_STATUS_EQUAL(status
, NT_STATUS_STOPPED_ON_SYMLINK
)) {
1044 size_t name_in_len
, dirname_len
;
1046 if (lp_host_msdfs() && lp_msdfs_root(SNUM(conn
)) &&
1047 strnequal(symlink_err
->reparse
->substitute_name
,
1050 status
= NT_STATUS_PATH_NOT_COVERED
;
1054 name_in_len
= strlen(name_in
);
1055 dirname_len
= strlen(dirname
);
1057 SMB_ASSERT(name_in_len
>= dirname_len
);
1059 symlink_err
->unparsed
+= (name_in_len
- dirname_len
);
1060 *_symlink_err
= symlink_err
;
1066 if (!NT_STATUS_IS_OK(status
)) {
1067 DBG_DEBUG("opening directory %s failed: %s\n",
1070 TALLOC_FREE(dirname
);
1072 if (!NT_STATUS_EQUAL(status
, NT_STATUS_ACCESS_DENIED
)) {
1074 * Except ACCESS_DENIED, everything else leads
1075 * to PATH_NOT_FOUND.
1077 status
= NT_STATUS_OBJECT_PATH_NOT_FOUND
;
1083 if (!VALID_STAT_OF_DIR(smb_dirname
->st
)) {
1084 status
= NT_STATUS_OBJECT_PATH_NOT_FOUND
;
1087 smb_dirname
->fsp
->fsp_flags
.is_directory
= true;
1090 * Only look at bad last component values
1091 * once we know we have a valid directory. That
1092 * way we won't confuse error messages from
1093 * opening the directory path with error
1094 * messages from a bad last component.
1097 /* Relative filename can't be empty */
1098 if (fname_rel
[0] == '\0') {
1099 status
= NT_STATUS_OBJECT_NAME_INVALID
;
1103 /* Relative filename can't be ".." */
1104 if (ISDOTDOT(fname_rel
)) {
1105 status
= NT_STATUS_OBJECT_NAME_INVALID
;
1108 /* Relative name can only be dot if directory is empty. */
1109 if (ISDOT(fname_rel
) && dirname
[0] != '\0') {
1110 status
= NT_STATUS_OBJECT_NAME_INVALID
;
1114 TALLOC_FREE(dirname
);
1116 smb_fname_rel
= synthetic_smb_fname(
1122 posix
? SMB_FILENAME_POSIX_PATH
: 0);
1123 if (smb_fname_rel
== NULL
) {
1124 status
= NT_STATUS_NO_MEMORY
;
1128 if ((conn
->fs_capabilities
& FILE_NAMED_STREAMS
) &&
1129 is_named_stream(smb_fname_rel
)) {
1131 * Find the base_fsp first without the stream.
1133 saved_streamname
= smb_fname_rel
->stream_name
;
1134 smb_fname_rel
->stream_name
= NULL
;
1137 status
= normalize_filename_case(
1138 conn
, smb_fname_rel
->base_name
, ucf_flags
);
1139 if (!NT_STATUS_IS_OK(status
)) {
1140 DBG_ERR("normalize_filename_case %s failed: %s\n",
1141 smb_fname_rel
->base_name
,
1146 status
= openat_pathref_fsp_case_insensitive(
1147 smb_dirname
->fsp
, smb_fname_rel
, ucf_flags
);
1149 if (NT_STATUS_EQUAL(status
, NT_STATUS_OBJECT_NAME_NOT_FOUND
) &&
1150 VALID_STAT(smb_fname_rel
->st
) &&
1151 S_ISLNK(smb_fname_rel
->st
.st_ex_mode
)) {
1154 * If we're on an MSDFS share, see if this is
1157 if (lp_host_msdfs() &&
1158 lp_msdfs_root(SNUM(conn
)) &&
1159 is_msdfs_link(smb_dirname
->fsp
, smb_fname_rel
))
1161 status
= NT_STATUS_PATH_NOT_COVERED
;
1165 #if defined(WITH_SMB1SERVER)
1167 * In SMB1 posix mode, if this is a symlink,
1168 * allow access to the name with a NULL smb_fname->fsp.
1170 if (ucf_flags
& UCF_LCOMP_LNK_OK
) {
1171 SMB_ASSERT(smb_fname_rel
->fsp
== NULL
);
1172 SMB_ASSERT(streamname
== NULL
);
1174 smb_fname
= full_path_from_dirfsp_atname(
1178 if (smb_fname
== NULL
) {
1179 status
= NT_STATUS_NO_MEMORY
;
1187 if (NT_STATUS_EQUAL(status
, NT_STATUS_OBJECT_NAME_NOT_FOUND
) &&
1188 !VALID_STAT(smb_fname_rel
->st
)) {
1190 char *normalized
= NULL
;
1193 * Creating a new file
1196 status
= filename_convert_normalize_new(
1199 smb_fname_rel
->base_name
,
1201 if (!NT_STATUS_IS_OK(status
)) {
1202 DBG_DEBUG("filename_convert_normalize_new failed: "
1207 if (normalized
!= NULL
) {
1208 smb_fname_rel
->base_name
= normalized
;
1211 smb_fname_rel
->stream_name
= saved_streamname
;
1213 smb_fname
= full_path_from_dirfsp_atname(
1214 mem_ctx
, smb_dirname
->fsp
, smb_fname_rel
);
1215 if (smb_fname
== NULL
) {
1216 status
= NT_STATUS_NO_MEMORY
;
1222 if (NT_STATUS_EQUAL(status
, NT_STATUS_NETWORK_OPEN_RESTRICTION
)) {
1223 /* A vetoed file, pretend it's not there */
1224 status
= NT_STATUS_OBJECT_NAME_NOT_FOUND
;
1226 if (!NT_STATUS_IS_OK(status
)) {
1230 if (saved_streamname
== NULL
) {
1231 /* smb_fname must be allocated off mem_ctx. */
1232 smb_fname
= cp_smb_filename(mem_ctx
,
1233 smb_fname_rel
->fsp
->fsp_name
);
1234 if (smb_fname
== NULL
) {
1237 status
= move_smb_fname_fsp_link(smb_fname
, smb_fname_rel
);
1238 if (!NT_STATUS_IS_OK(status
)) {
1244 base_fsp
= smb_fname_rel
->fsp
;
1245 smb_fname_fsp_unlink(smb_fname_rel
);
1246 SET_STAT_INVALID(smb_fname_rel
->st
);
1248 smb_fname_rel
->stream_name
= saved_streamname
;
1250 status
= open_stream_pathref_fsp(&base_fsp
, smb_fname_rel
);
1252 if (NT_STATUS_EQUAL(status
, NT_STATUS_OBJECT_NAME_NOT_FOUND
) &&
1253 !conn
->case_sensitive
) {
1256 status
= get_real_stream_name(
1259 smb_fname_rel
->stream_name
,
1262 if (NT_STATUS_IS_OK(status
)) {
1263 smb_fname_rel
->stream_name
= found
;
1265 status
= open_stream_pathref_fsp(
1266 &base_fsp
, smb_fname_rel
);
1270 if (NT_STATUS_IS_OK(status
)) {
1271 /* smb_fname must be allocated off mem_ctx. */
1272 smb_fname
= cp_smb_filename(mem_ctx
,
1273 smb_fname_rel
->fsp
->fsp_name
);
1274 if (smb_fname
== NULL
) {
1277 status
= move_smb_fname_fsp_link(smb_fname
, smb_fname_rel
);
1278 if (!NT_STATUS_IS_OK(status
)) {
1284 if (NT_STATUS_EQUAL(status
, NT_STATUS_OBJECT_NAME_NOT_FOUND
)) {
1286 * Creating a new stream
1288 * We should save the already-open base fsp for
1289 * create_file_unixpath() somehow.
1291 smb_fname
= full_path_from_dirfsp_atname(
1292 mem_ctx
, smb_dirname
->fsp
, smb_fname_rel
);
1293 if (smb_fname
== NULL
) {
1294 status
= NT_STATUS_NO_MEMORY
;
1298 * When open_stream_pathref_fsp() returns
1299 * NT_STATUS_OBJECT_NAME_NOT_FOUND, smb_fname_rel->fsp
1300 * has been set to NULL, so we must free base_fsp separately
1301 * to prevent fd-leaks when opening a stream that doesn't
1305 file_free(NULL
, base_fsp
);
1310 if (!NT_STATUS_IS_OK(status
)) {
1315 *_dirfsp
= smb_dirname
->fsp
;
1316 *_smb_fname
= smb_fname
;
1318 smb_fname_fsp_unlink(smb_fname_rel
);
1319 TALLOC_FREE(smb_fname_rel
);
1320 return NT_STATUS_OK
;
1324 * If open_stream_pathref_fsp() returns an error, smb_fname_rel->fsp
1325 * has been set to NULL, so we must free base_fsp separately
1326 * to prevent fd-leaks when opening a stream that doesn't
1329 if (base_fsp
!= NULL
) {
1331 file_free(NULL
, base_fsp
);
1334 TALLOC_FREE(dirname
);
1335 TALLOC_FREE(smb_dirname
);
1336 TALLOC_FREE(smb_fname_rel
);
1340 NTSTATUS
filename_convert_dirfsp(
1341 TALLOC_CTX
*mem_ctx
,
1342 connection_struct
*conn
,
1343 const char *name_in
,
1346 struct files_struct
**_dirfsp
,
1347 struct smb_filename
**_smb_fname
)
1349 struct open_symlink_err
*symlink_err
= NULL
;
1351 char *substitute
= NULL
;
1352 char *target
= NULL
;
1353 size_t symlink_redirects
= 0;
1356 if (symlink_redirects
> 40) {
1357 return NT_STATUS_OBJECT_PATH_NOT_FOUND
;
1360 status
= filename_convert_dirfsp_nosymlink(mem_ctx
,
1369 if (!NT_STATUS_EQUAL(status
, NT_STATUS_STOPPED_ON_SYMLINK
)) {
1373 if (!lp_follow_symlinks(SNUM(conn
))) {
1374 status
= (symlink_err
->unparsed
== 0)
1375 ? NT_STATUS_OBJECT_NAME_NOT_FOUND
1376 : NT_STATUS_OBJECT_PATH_NOT_FOUND
;
1377 TALLOC_FREE(symlink_err
);
1382 * Right now, SMB2 and SMB1 always traverse symlinks
1383 * within the share. SMB1+POSIX traverses non-terminal
1384 * symlinks within the share.
1386 * When we add SMB2+POSIX we need to return
1387 * a NT_STATUS_STOPPED_ON_SYMLINK error here, using the
1388 * symlink target data read below if SMB2+POSIX has
1389 * UCF_POSIX_PATHNAMES set to cause the client to
1390 * resolve all symlinks locally.
1393 substitute
= symlink_err
->reparse
->substitute_name
;
1395 status
= safe_symlink_target_path(mem_ctx
,
1399 symlink_err
->unparsed
,
1401 TALLOC_FREE(symlink_err
);
1402 if (!NT_STATUS_IS_OK(status
)) {
1407 symlink_redirects
+= 1;
1412 char *full_path_from_dirfsp_at_basename(TALLOC_CTX
*mem_ctx
,
1413 const struct files_struct
*dirfsp
,
1414 const char *at_base_name
)
1418 if (dirfsp
== dirfsp
->conn
->cwd_fsp
||
1419 ISDOT(dirfsp
->fsp_name
->base_name
) || at_base_name
[0] == '/') {
1420 path
= talloc_strdup(mem_ctx
, at_base_name
);
1422 path
= talloc_asprintf(mem_ctx
,
1424 dirfsp
->fsp_name
->base_name
,
1432 * Build the full path from a dirfsp and dirfsp relative name
1434 struct smb_filename
*
1435 full_path_from_dirfsp_atname(TALLOC_CTX
*mem_ctx
,
1436 const struct files_struct
*dirfsp
,
1437 const struct smb_filename
*atname
)
1439 struct smb_filename
*fname
= NULL
;
1442 path
= full_path_from_dirfsp_at_basename(mem_ctx
,
1449 fname
= synthetic_smb_fname(mem_ctx
,
1451 atname
->stream_name
,
1456 if (fname
== NULL
) {