2 Unix SMB/CIFS implementation.
3 dos mode handling functions
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) James Peach 2006
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include "system/filesys.h"
23 #include "librpc/gen_ndr/ndr_xattr.h"
24 #include "librpc/gen_ndr/ioctl.h"
25 #include "../libcli/security/security.h"
26 #include "smbd/smbd.h"
27 #include "lib/param/loadparm.h"
29 static NTSTATUS get_file_handle_for_metadata(connection_struct *conn,
30 const struct smb_filename *smb_fname,
31 files_struct **ret_fsp,
34 static void dos_mode_debug_print(const char *func, uint32_t mode)
38 if (DEBUGLEVEL < DBGLVL_INFO) {
44 if (mode & FILE_ATTRIBUTE_HIDDEN) {
45 fstrcat(modestr, "h");
47 if (mode & FILE_ATTRIBUTE_READONLY) {
48 fstrcat(modestr, "r");
50 if (mode & FILE_ATTRIBUTE_SYSTEM) {
51 fstrcat(modestr, "s");
53 if (mode & FILE_ATTRIBUTE_DIRECTORY) {
54 fstrcat(modestr, "d");
56 if (mode & FILE_ATTRIBUTE_ARCHIVE) {
57 fstrcat(modestr, "a");
59 if (mode & FILE_ATTRIBUTE_SPARSE) {
60 fstrcat(modestr, "[sparse]");
62 if (mode & FILE_ATTRIBUTE_OFFLINE) {
63 fstrcat(modestr, "[offline]");
65 if (mode & FILE_ATTRIBUTE_COMPRESSED) {
66 fstrcat(modestr, "[compressed]");
69 DBG_INFO("%s returning (0x%x): \"%s\"\n", func, (unsigned)mode,
73 static uint32_t filter_mode_by_protocol(uint32_t mode)
75 if (get_Protocol() <= PROTOCOL_LANMAN2) {
76 DEBUG(10,("filter_mode_by_protocol: "
77 "filtering result 0x%x to 0x%x\n",
79 (unsigned int)(mode & 0x3f) ));
85 static int set_link_read_only_flag(const SMB_STRUCT_STAT *const sbuf)
89 if (S_ISLNK(sbuf->st_mode) && S_ISDIR(sbuf->st_mode))
90 return FILE_ATTRIBUTE_READONLY;
96 /****************************************************************************
97 Change a dos mode to a unix mode.
98 Base permission for files:
99 if creating file and inheriting (i.e. parent_dir != NULL)
100 apply read/write bits from parent directory.
102 everybody gets read bit set
103 dos readonly is represented in unix by removing everyone's write bit
104 dos archive is represented in unix by the user's execute bit
105 dos system is represented in unix by the group's execute bit
106 dos hidden is represented in unix by the other's execute bit
108 Then apply create mask,
111 Base permission for directories:
112 dos directory is represented in unix by unix's dir bit and the exec bit
114 Then apply create mask,
117 ****************************************************************************/
119 mode_t unix_mode(connection_struct *conn, int dosmode,
120 const struct smb_filename *smb_fname,
121 const char *inherit_from_dir)
123 mode_t result = (S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR | S_IWGRP | S_IWOTH);
124 mode_t dir_mode = 0; /* Mode of the inherit_from directory if
127 if (!lp_store_dos_attributes(SNUM(conn)) && IS_DOS_READONLY(dosmode)) {
128 result &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
131 if ((inherit_from_dir != NULL) && lp_inherit_permissions(SNUM(conn))) {
132 struct smb_filename *smb_fname_parent;
134 DEBUG(2, ("unix_mode(%s) inheriting from %s\n",
135 smb_fname_str_dbg(smb_fname),
138 smb_fname_parent = synthetic_smb_fname(talloc_tos(),
143 if (smb_fname_parent == NULL) {
144 DEBUG(1,("unix_mode(%s) failed, [dir %s]: No memory\n",
145 smb_fname_str_dbg(smb_fname),
150 if (SMB_VFS_STAT(conn, smb_fname_parent) != 0) {
151 DEBUG(4,("unix_mode(%s) failed, [dir %s]: %s\n",
152 smb_fname_str_dbg(smb_fname),
153 inherit_from_dir, strerror(errno)));
154 TALLOC_FREE(smb_fname_parent);
155 return(0); /* *** shouldn't happen! *** */
158 /* Save for later - but explicitly remove setuid bit for safety. */
159 dir_mode = smb_fname_parent->st.st_ex_mode & ~S_ISUID;
160 DEBUG(2,("unix_mode(%s) inherit mode %o\n",
161 smb_fname_str_dbg(smb_fname), (int)dir_mode));
164 TALLOC_FREE(smb_fname_parent);
167 if (IS_DOS_DIR(dosmode)) {
168 /* We never make directories read only for the owner as under DOS a user
169 can always create a file in a read-only directory. */
170 result |= (S_IFDIR | S_IWUSR);
173 /* Inherit mode of parent directory. */
176 /* Provisionally add all 'x' bits */
177 result |= (S_IXUSR | S_IXGRP | S_IXOTH);
179 /* Apply directory mask */
180 result &= lp_directory_mask(SNUM(conn));
181 /* Add in force bits */
182 result |= lp_force_directory_mode(SNUM(conn));
185 if (lp_map_archive(SNUM(conn)) && IS_DOS_ARCHIVE(dosmode))
188 if (lp_map_system(SNUM(conn)) && IS_DOS_SYSTEM(dosmode))
191 if (lp_map_hidden(SNUM(conn)) && IS_DOS_HIDDEN(dosmode))
195 /* Inherit 666 component of parent directory mode */
196 result |= dir_mode & (S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR | S_IWGRP | S_IWOTH);
198 /* Apply mode mask */
199 result &= lp_create_mask(SNUM(conn));
200 /* Add in force bits */
201 result |= lp_force_create_mode(SNUM(conn));
205 DBG_INFO("unix_mode(%s) returning 0%o\n",
206 smb_fname_str_dbg(smb_fname), (int)result);
211 /****************************************************************************
212 Change a unix mode to a dos mode.
213 ****************************************************************************/
215 static uint32_t dos_mode_from_sbuf(connection_struct *conn,
216 const struct smb_filename *smb_fname)
219 enum mapreadonly_options ro_opts = (enum mapreadonly_options)lp_map_readonly(SNUM(conn));
221 #if defined(UF_IMMUTABLE) && defined(SF_IMMUTABLE)
222 /* if we can find out if a file is immutable we should report it r/o */
223 if (smb_fname->st.st_ex_flags & (UF_IMMUTABLE | SF_IMMUTABLE)) {
224 result |= FILE_ATTRIBUTE_READONLY;
227 if (ro_opts == MAP_READONLY_YES) {
228 /* Original Samba method - map inverse of user "w" bit. */
229 if ((smb_fname->st.st_ex_mode & S_IWUSR) == 0) {
230 result |= FILE_ATTRIBUTE_READONLY;
232 } else if (ro_opts == MAP_READONLY_PERMISSIONS) {
233 /* Check actual permissions for read-only. */
234 if (!can_write_to_file(conn, smb_fname)) {
235 result |= FILE_ATTRIBUTE_READONLY;
237 } /* Else never set the readonly bit. */
239 if (MAP_ARCHIVE(conn) && ((smb_fname->st.st_ex_mode & S_IXUSR) != 0))
240 result |= FILE_ATTRIBUTE_ARCHIVE;
242 if (MAP_SYSTEM(conn) && ((smb_fname->st.st_ex_mode & S_IXGRP) != 0))
243 result |= FILE_ATTRIBUTE_SYSTEM;
245 if (MAP_HIDDEN(conn) && ((smb_fname->st.st_ex_mode & S_IXOTH) != 0))
246 result |= FILE_ATTRIBUTE_HIDDEN;
248 if (S_ISDIR(smb_fname->st.st_ex_mode))
249 result = FILE_ATTRIBUTE_DIRECTORY | (result & FILE_ATTRIBUTE_READONLY);
251 result |= set_link_read_only_flag(&smb_fname->st);
253 dos_mode_debug_print(__func__, result);
258 /****************************************************************************
259 Get DOS attributes from an EA.
260 This can also pull the create time into the stat struct inside smb_fname.
261 ****************************************************************************/
263 NTSTATUS get_ea_dos_attribute(connection_struct *conn,
264 struct smb_filename *smb_fname,
267 struct xattr_DOSATTRIB dosattrib;
268 enum ndr_err_code ndr_err;
274 if (!lp_store_dos_attributes(SNUM(conn))) {
275 return NT_STATUS_NOT_IMPLEMENTED;
278 /* Don't reset pattr to zero as we may already have filename-based attributes we
281 sizeret = SMB_VFS_GETXATTR(conn, smb_fname,
282 SAMBA_XATTR_DOS_ATTRIB, attrstr,
284 if (sizeret == -1 && errno == EACCES) {
288 * According to MS-FSA 2.1.5.1.2.1 "Algorithm to Check Access to
289 * an Existing File" FILE_LIST_DIRECTORY on a directory implies
290 * FILE_READ_ATTRIBUTES for directory entries. Being able to
291 * stat() a file implies FILE_LIST_DIRECTORY for the directory
292 * containing the file.
295 if (!VALID_STAT(smb_fname->st)) {
297 * Safety net: dos_mode() already checks this, but as we
298 * become root based on this, add an additional layer of
301 DBG_ERR("Rejecting root override, invalid stat [%s]\n",
302 smb_fname_str_dbg(smb_fname));
303 return NT_STATUS_ACCESS_DENIED;
307 sizeret = SMB_VFS_GETXATTR(conn, smb_fname,
308 SAMBA_XATTR_DOS_ATTRIB,
316 if (saved_errno != 0) {
321 DBG_INFO("Cannot get attribute "
322 "from EA on file %s: Error = %s\n",
323 smb_fname_str_dbg(smb_fname), strerror(errno));
324 return map_nt_error_from_unix(errno);
327 blob.data = (uint8_t *)attrstr;
328 blob.length = sizeret;
330 ndr_err = ndr_pull_struct_blob(&blob, talloc_tos(), &dosattrib,
331 (ndr_pull_flags_fn_t)ndr_pull_xattr_DOSATTRIB);
333 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
334 DEBUG(1,("get_ea_dos_attribute: bad ndr decode "
335 "from EA on file %s: Error = %s\n",
336 smb_fname_str_dbg(smb_fname),
337 ndr_errstr(ndr_err)));
338 return ndr_map_error2ntstatus(ndr_err);
341 DEBUG(10,("get_ea_dos_attribute: %s attr = %s\n",
342 smb_fname_str_dbg(smb_fname), dosattrib.attrib_hex));
344 switch (dosattrib.version) {
346 dosattr = dosattrib.info.compatinfoFFFF.attrib;
349 dosattr = dosattrib.info.info1.attrib;
350 if (!null_nttime(dosattrib.info.info1.create_time)) {
351 struct timespec create_time =
352 nt_time_to_unix_timespec(
353 dosattrib.info.info1.create_time);
355 update_stat_ex_create_time(&smb_fname->st,
358 DEBUG(10,("get_ea_dos_attribute: file %s case 1 "
360 smb_fname_str_dbg(smb_fname),
361 time_to_asc(convert_timespec_to_time_t(
366 dosattr = dosattrib.info.oldinfo2.attrib;
367 /* Don't know what flags to check for this case. */
370 dosattr = dosattrib.info.info3.attrib;
371 if ((dosattrib.info.info3.valid_flags & XATTR_DOSINFO_CREATE_TIME) &&
372 !null_nttime(dosattrib.info.info3.create_time)) {
373 struct timespec create_time =
374 nt_time_to_unix_timespec(
375 dosattrib.info.info3.create_time);
377 update_stat_ex_create_time(&smb_fname->st,
380 DEBUG(10,("get_ea_dos_attribute: file %s case 3 "
382 smb_fname_str_dbg(smb_fname),
383 time_to_asc(convert_timespec_to_time_t(
388 DEBUG(1,("get_ea_dos_attribute: Badly formed DOSATTRIB on "
389 "file %s - %s\n", smb_fname_str_dbg(smb_fname),
391 /* Should this be INTERNAL_ERROR? */
392 return NT_STATUS_INVALID_PARAMETER;
395 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
396 dosattr |= FILE_ATTRIBUTE_DIRECTORY;
398 /* FILE_ATTRIBUTE_SPARSE is valid on get but not on set. */
399 *pattr |= (uint32_t)(dosattr & (SAMBA_ATTRIBUTES_MASK|FILE_ATTRIBUTE_SPARSE));
401 dos_mode_debug_print(__func__, *pattr);
406 /****************************************************************************
407 Set DOS attributes in an EA.
408 Also sets the create time.
409 ****************************************************************************/
411 NTSTATUS set_ea_dos_attribute(connection_struct *conn,
412 const struct smb_filename *smb_fname,
415 struct xattr_DOSATTRIB dosattrib;
416 enum ndr_err_code ndr_err;
420 if (!lp_store_dos_attributes(SNUM(conn))) {
421 return NT_STATUS_NOT_IMPLEMENTED;
425 * Don't store FILE_ATTRIBUTE_OFFLINE, it's dealt with in
426 * vfs_default via DMAPI if that is enabled.
428 dosmode &= ~FILE_ATTRIBUTE_OFFLINE;
430 ZERO_STRUCT(dosattrib);
433 dosattrib.version = 3;
434 dosattrib.info.info3.valid_flags = XATTR_DOSINFO_ATTRIB|
435 XATTR_DOSINFO_CREATE_TIME;
436 dosattrib.info.info3.attrib = dosmode;
437 dosattrib.info.info3.create_time = unix_timespec_to_nt_time(
438 smb_fname->st.st_ex_btime);
440 DEBUG(10,("set_ea_dos_attributes: set attribute 0x%x, btime = %s on file %s\n",
441 (unsigned int)dosmode,
442 time_to_asc(convert_timespec_to_time_t(smb_fname->st.st_ex_btime)),
443 smb_fname_str_dbg(smb_fname) ));
445 ndr_err = ndr_push_struct_blob(
446 &blob, talloc_tos(), &dosattrib,
447 (ndr_push_flags_fn_t)ndr_push_xattr_DOSATTRIB);
449 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
450 DEBUG(5, ("create_acl_blob: ndr_push_xattr_DOSATTRIB failed: %s\n",
451 ndr_errstr(ndr_err)));
452 return ndr_map_error2ntstatus(ndr_err);
455 if (blob.data == NULL || blob.length == 0) {
456 /* Should this be INTERNAL_ERROR? */
457 return NT_STATUS_INVALID_PARAMETER;
460 ret = SMB_VFS_SETXATTR(conn, smb_fname,
461 SAMBA_XATTR_DOS_ATTRIB,
462 blob.data, blob.length, 0);
464 NTSTATUS status = NT_STATUS_OK;
465 bool need_close = false;
466 files_struct *fsp = NULL;
467 bool set_dosmode_ok = false;
469 if ((errno != EPERM) && (errno != EACCES)) {
470 DBG_INFO("Cannot set "
471 "attribute EA on file %s: Error = %s\n",
472 smb_fname_str_dbg(smb_fname), strerror(errno));
473 return map_nt_error_from_unix(errno);
476 /* We want DOS semantics, ie allow non owner with write permission to change the
477 bits on a file. Just like file_ntimes below.
480 /* Check if we have write access. */
481 if (!CAN_WRITE(conn)) {
482 return NT_STATUS_ACCESS_DENIED;
485 status = smbd_check_access_rights(conn, smb_fname, false,
486 FILE_WRITE_ATTRIBUTES);
487 if (NT_STATUS_IS_OK(status)) {
488 set_dosmode_ok = true;
491 if (!set_dosmode_ok && lp_dos_filemode(SNUM(conn))) {
492 set_dosmode_ok = can_write_to_file(conn, smb_fname);
495 if (!set_dosmode_ok) {
496 return NT_STATUS_ACCESS_DENIED;
500 * We need to get an open file handle to do the
501 * metadata operation under root.
504 status = get_file_handle_for_metadata(conn,
508 if (!NT_STATUS_IS_OK(status)) {
513 ret = SMB_VFS_FSETXATTR(fsp,
514 SAMBA_XATTR_DOS_ATTRIB,
515 blob.data, blob.length, 0);
517 status = NT_STATUS_OK;
521 close_file(NULL, fsp, NORMAL_CLOSE);
525 DEBUG(10,("set_ea_dos_attribute: set EA 0x%x on file %s\n",
526 (unsigned int)dosmode,
527 smb_fname_str_dbg(smb_fname)));
531 /****************************************************************************
532 Change a unix mode to a dos mode for an ms dfs link.
533 ****************************************************************************/
535 uint32_t dos_mode_msdfs(connection_struct *conn,
536 const struct smb_filename *smb_fname)
540 DEBUG(8,("dos_mode_msdfs: %s\n", smb_fname_str_dbg(smb_fname)));
542 if (!VALID_STAT(smb_fname->st)) {
546 /* First do any modifications that depend on the path name. */
547 /* hide files with a name starting with a . */
548 if (lp_hide_dot_files(SNUM(conn))) {
549 const char *p = strrchr_m(smb_fname->base_name, '/');
553 p = smb_fname->base_name;
556 /* Only . and .. are not hidden. */
557 if (p[0] == '.' && !((p[1] == '\0') ||
558 (p[1] == '.' && p[2] == '\0'))) {
559 result |= FILE_ATTRIBUTE_HIDDEN;
563 result |= dos_mode_from_sbuf(conn, smb_fname);
565 /* Optimization : Only call is_hidden_path if it's not already
567 if (!(result & FILE_ATTRIBUTE_HIDDEN) &&
568 IS_HIDDEN_PATH(conn, smb_fname->base_name)) {
569 result |= FILE_ATTRIBUTE_HIDDEN;
573 result = FILE_ATTRIBUTE_NORMAL;
576 result = filter_mode_by_protocol(result);
579 * Add in that it is a reparse point
581 result |= FILE_ATTRIBUTE_REPARSE_POINT;
583 dos_mode_debug_print(__func__, result);
589 * check whether a file or directory is flagged as compressed.
591 static NTSTATUS dos_mode_check_compressed(connection_struct *conn,
592 struct smb_filename *smb_fname,
596 uint16_t compression_fmt;
597 TALLOC_CTX *tmp_ctx = talloc_new(NULL);
598 if (tmp_ctx == NULL) {
599 status = NT_STATUS_NO_MEMORY;
603 status = SMB_VFS_GET_COMPRESSION(conn, tmp_ctx, NULL, smb_fname,
605 if (!NT_STATUS_IS_OK(status)) {
609 if (compression_fmt == COMPRESSION_FORMAT_LZNT1) {
610 *is_compressed = true;
612 *is_compressed = false;
614 status = NT_STATUS_OK;
617 talloc_free(tmp_ctx);
622 static uint32_t dos_mode_from_name(connection_struct *conn,
623 const struct smb_filename *smb_fname,
626 const char *p = NULL;
627 uint32_t result = dosmode;
629 if (!(result & FILE_ATTRIBUTE_HIDDEN) &&
630 lp_hide_dot_files(SNUM(conn)))
632 p = strrchr_m(smb_fname->base_name, '/');
636 p = smb_fname->base_name;
639 /* Only . and .. are not hidden. */
641 !((p[1] == '\0') || (p[1] == '.' && p[2] == '\0')))
643 result |= FILE_ATTRIBUTE_HIDDEN;
647 if (!(result & FILE_ATTRIBUTE_HIDDEN) &&
648 IS_HIDDEN_PATH(conn, smb_fname->base_name))
650 result |= FILE_ATTRIBUTE_HIDDEN;
656 /****************************************************************************
657 Change a unix mode to a dos mode.
658 May also read the create timespec into the stat struct in smb_fname
659 if "store dos attributes" is true.
660 ****************************************************************************/
662 uint32_t dos_mode(connection_struct *conn, struct smb_filename *smb_fname)
665 NTSTATUS status = NT_STATUS_OK;
667 DEBUG(8,("dos_mode: %s\n", smb_fname_str_dbg(smb_fname)));
669 if (!VALID_STAT(smb_fname->st)) {
673 /* Get the DOS attributes via the VFS if we can */
674 status = SMB_VFS_GET_DOS_ATTRIBUTES(conn, smb_fname, &result);
675 if (!NT_STATUS_IS_OK(status)) {
677 * Only fall back to using UNIX modes if we get NOT_IMPLEMENTED.
679 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)) {
680 result |= dos_mode_from_sbuf(conn, smb_fname);
684 if (conn->fs_capabilities & FILE_FILE_COMPRESSION) {
685 bool compressed = false;
686 status = dos_mode_check_compressed(conn, smb_fname,
688 if (NT_STATUS_IS_OK(status) && compressed) {
689 result |= FILE_ATTRIBUTE_COMPRESSED;
693 result |= dos_mode_from_name(conn, smb_fname, result);
695 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
696 result |= FILE_ATTRIBUTE_DIRECTORY;
697 } else if (result == 0) {
698 result = FILE_ATTRIBUTE_NORMAL;
701 result = filter_mode_by_protocol(result);
703 dos_mode_debug_print(__func__, result);
708 /*******************************************************************
709 chmod a file - but preserve some bits.
710 If "store dos attributes" is also set it will store the create time
711 from the stat struct in smb_fname (in NTTIME format) in the EA
713 ********************************************************************/
715 int file_set_dosmode(connection_struct *conn, struct smb_filename *smb_fname,
716 uint32_t dosmode, const char *parent_dir, bool newfile)
721 int ret = -1, lret = -1;
722 files_struct *fsp = NULL;
723 bool need_close = false;
726 if (!CAN_WRITE(conn)) {
731 dosmode &= SAMBA_ATTRIBUTES_MASK;
733 DEBUG(10,("file_set_dosmode: setting dos mode 0x%x on file %s\n",
734 dosmode, smb_fname_str_dbg(smb_fname)));
736 unixmode = smb_fname->st.st_ex_mode;
738 get_acl_group_bits(conn, smb_fname,
739 &smb_fname->st.st_ex_mode);
741 if (S_ISDIR(smb_fname->st.st_ex_mode))
742 dosmode |= FILE_ATTRIBUTE_DIRECTORY;
744 dosmode &= ~FILE_ATTRIBUTE_DIRECTORY;
746 /* Store the DOS attributes in an EA by preference. */
747 status = SMB_VFS_SET_DOS_ATTRIBUTES(conn, smb_fname, dosmode);
748 if (NT_STATUS_IS_OK(status)) {
750 notify_fname(conn, NOTIFY_ACTION_MODIFIED,
751 FILE_NOTIFY_CHANGE_ATTRIBUTES,
752 smb_fname->base_name);
754 smb_fname->st.st_ex_mode = unixmode;
758 * Only fall back to using UNIX modes if
759 * we get NOT_IMPLEMENTED.
761 if (!NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)) {
762 errno = map_errno_from_nt_status(status);
767 /* Fall back to UNIX modes. */
768 unixmode = unix_mode(conn, dosmode, smb_fname, parent_dir);
770 /* preserve the file type bits */
773 /* preserve the s bits */
774 mask |= (S_ISUID | S_ISGID);
776 /* preserve the t bit */
781 /* possibly preserve the x bits */
782 if (!MAP_ARCHIVE(conn))
784 if (!MAP_SYSTEM(conn))
786 if (!MAP_HIDDEN(conn))
789 unixmode |= (smb_fname->st.st_ex_mode & mask);
791 /* if we previously had any r bits set then leave them alone */
792 if ((tmp = smb_fname->st.st_ex_mode & (S_IRUSR|S_IRGRP|S_IROTH))) {
793 unixmode &= ~(S_IRUSR|S_IRGRP|S_IROTH);
797 /* if we previously had any w bits set then leave them alone
798 whilst adding in the new w bits, if the new mode is not rdonly */
799 if (!IS_DOS_READONLY(dosmode)) {
800 unixmode |= (smb_fname->st.st_ex_mode & (S_IWUSR|S_IWGRP|S_IWOTH));
804 * From the chmod 2 man page:
806 * "If the calling process is not privileged, and the group of the file
807 * does not match the effective group ID of the process or one of its
808 * supplementary group IDs, the S_ISGID bit will be turned off, but
809 * this will not cause an error to be returned."
811 * Simply refuse to do the chmod in this case.
814 if (S_ISDIR(smb_fname->st.st_ex_mode) && (unixmode & S_ISGID) &&
815 geteuid() != sec_initial_uid() &&
816 !current_user_in_group(conn, smb_fname->st.st_ex_gid)) {
817 DEBUG(3,("file_set_dosmode: setgid bit cannot be "
818 "set for directory %s\n",
819 smb_fname_str_dbg(smb_fname)));
824 ret = SMB_VFS_CHMOD(conn, smb_fname, unixmode);
826 if(!newfile || (lret != -1)) {
827 notify_fname(conn, NOTIFY_ACTION_MODIFIED,
828 FILE_NOTIFY_CHANGE_ATTRIBUTES,
829 smb_fname->base_name);
831 smb_fname->st.st_ex_mode = unixmode;
835 if((errno != EPERM) && (errno != EACCES))
838 if(!lp_dos_filemode(SNUM(conn)))
841 /* We want DOS semantics, ie allow non owner with write permission to change the
842 bits on a file. Just like file_ntimes below.
845 if (!can_write_to_file(conn, smb_fname)) {
851 * We need to get an open file handle to do the
852 * metadata operation under root.
855 status = get_file_handle_for_metadata(conn,
859 if (!NT_STATUS_IS_OK(status)) {
860 errno = map_errno_from_nt_status(status);
865 ret = SMB_VFS_FCHMOD(fsp, unixmode);
868 close_file(NULL, fsp, NORMAL_CLOSE);
871 notify_fname(conn, NOTIFY_ACTION_MODIFIED,
872 FILE_NOTIFY_CHANGE_ATTRIBUTES,
873 smb_fname->base_name);
876 smb_fname->st.st_ex_mode = unixmode;
883 NTSTATUS file_set_sparse(connection_struct *conn,
887 uint32_t old_dosmode;
888 uint32_t new_dosmode;
891 if (!CAN_WRITE(conn)) {
892 DEBUG(9,("file_set_sparse: fname[%s] set[%u] "
893 "on readonly share[%s]\n",
894 smb_fname_str_dbg(fsp->fsp_name),
896 lp_servicename(talloc_tos(), SNUM(conn))));
897 return NT_STATUS_MEDIA_WRITE_PROTECTED;
901 * Windows Server 2008 & 2012 permit FSCTL_SET_SPARSE if any of the
902 * following access flags are granted.
904 if ((fsp->access_mask & (FILE_WRITE_DATA
905 | FILE_WRITE_ATTRIBUTES
906 | SEC_FILE_APPEND_DATA)) == 0) {
907 DEBUG(9,("file_set_sparse: fname[%s] set[%u] "
908 "access_mask[0x%08X] - access denied\n",
909 smb_fname_str_dbg(fsp->fsp_name),
912 return NT_STATUS_ACCESS_DENIED;
915 if (fsp->is_directory) {
916 DEBUG(9, ("invalid attempt to %s sparse flag on dir %s\n",
917 (sparse ? "set" : "clear"),
918 smb_fname_str_dbg(fsp->fsp_name)));
919 return NT_STATUS_INVALID_PARAMETER;
922 if (IS_IPC(conn) || IS_PRINT(conn)) {
923 DEBUG(9, ("attempt to %s sparse flag over invalid conn\n",
924 (sparse ? "set" : "clear")));
925 return NT_STATUS_INVALID_PARAMETER;
928 DEBUG(10,("file_set_sparse: setting sparse bit %u on file %s\n",
929 sparse, smb_fname_str_dbg(fsp->fsp_name)));
931 if (!lp_store_dos_attributes(SNUM(conn))) {
932 return NT_STATUS_INVALID_DEVICE_REQUEST;
935 status = vfs_stat_fsp(fsp);
936 if (!NT_STATUS_IS_OK(status)) {
940 old_dosmode = dos_mode(conn, fsp->fsp_name);
942 if (sparse && !(old_dosmode & FILE_ATTRIBUTE_SPARSE)) {
943 new_dosmode = old_dosmode | FILE_ATTRIBUTE_SPARSE;
944 } else if (!sparse && (old_dosmode & FILE_ATTRIBUTE_SPARSE)) {
945 new_dosmode = old_dosmode & ~FILE_ATTRIBUTE_SPARSE;
950 /* Store the DOS attributes in an EA. */
951 status = SMB_VFS_FSET_DOS_ATTRIBUTES(conn, fsp, new_dosmode);
952 if (!NT_STATUS_IS_OK(status)) {
956 notify_fname(conn, NOTIFY_ACTION_MODIFIED,
957 FILE_NOTIFY_CHANGE_ATTRIBUTES,
958 fsp->fsp_name->base_name);
960 fsp->is_sparse = sparse;
965 /*******************************************************************
966 Wrapper around the VFS ntimes that possibly allows DOS semantics rather
968 *******************************************************************/
970 int file_ntimes(connection_struct *conn, const struct smb_filename *smb_fname,
971 struct smb_file_time *ft)
977 DEBUG(6, ("file_ntime: actime: %s",
978 time_to_asc(convert_timespec_to_time_t(ft->atime))));
979 DEBUG(6, ("file_ntime: modtime: %s",
980 time_to_asc(convert_timespec_to_time_t(ft->mtime))));
981 DEBUG(6, ("file_ntime: ctime: %s",
982 time_to_asc(convert_timespec_to_time_t(ft->ctime))));
983 DEBUG(6, ("file_ntime: createtime: %s",
984 time_to_asc(convert_timespec_to_time_t(ft->create_time))));
986 /* Don't update the time on read-only shares */
987 /* We need this as set_filetime (which can be called on
988 close and other paths) can end up calling this function
989 without the NEED_WRITE protection. Found by :
990 Leo Weppelman <leo@wau.mis.ah.nl>
993 if (!CAN_WRITE(conn)) {
997 if(SMB_VFS_NTIMES(conn, smb_fname, ft) == 0) {
1001 if((errno != EPERM) && (errno != EACCES)) {
1005 if(!lp_dos_filetimes(SNUM(conn))) {
1009 /* We have permission (given by the Samba admin) to
1010 break POSIX semantics and allow a user to change
1011 the time on a file they don't own but can write to
1015 /* Check if we have write access. */
1016 if (can_write_to_file(conn, smb_fname)) {
1017 /* We are allowed to become root and change the filetime. */
1019 ret = SMB_VFS_NTIMES(conn, smb_fname, ft);
1026 /******************************************************************
1027 Force a "sticky" write time on a pathname. This will always be
1028 returned on all future write time queries and set on close.
1029 ******************************************************************/
1031 bool set_sticky_write_time_path(struct file_id fileid, struct timespec mtime)
1033 if (null_timespec(mtime)) {
1037 if (!set_sticky_write_time(fileid, mtime)) {
1044 /******************************************************************
1045 Force a "sticky" write time on an fsp. This will always be
1046 returned on all future write time queries and set on close.
1047 ******************************************************************/
1049 bool set_sticky_write_time_fsp(struct files_struct *fsp, struct timespec mtime)
1051 if (null_timespec(mtime)) {
1055 fsp->write_time_forced = true;
1056 TALLOC_FREE(fsp->update_write_time_event);
1058 return set_sticky_write_time_path(fsp->file_id, mtime);
1061 /******************************************************************
1062 Set a create time EA.
1063 ******************************************************************/
1065 NTSTATUS set_create_timespec_ea(connection_struct *conn,
1066 const struct smb_filename *psmb_fname,
1067 struct timespec create_time)
1069 struct smb_filename *smb_fname;
1073 if (!lp_store_dos_attributes(SNUM(conn))) {
1074 return NT_STATUS_OK;
1077 smb_fname = synthetic_smb_fname(talloc_tos(),
1078 psmb_fname->base_name,
1083 if (smb_fname == NULL) {
1084 return NT_STATUS_NO_MEMORY;
1087 dosmode = dos_mode(conn, smb_fname);
1089 smb_fname->st.st_ex_btime = create_time;
1091 ret = file_set_dosmode(conn, smb_fname, dosmode, NULL, false);
1093 return map_nt_error_from_unix(errno);
1096 DEBUG(10,("set_create_timespec_ea: wrote create time EA for file %s\n",
1097 smb_fname_str_dbg(smb_fname)));
1099 return NT_STATUS_OK;
1102 /******************************************************************
1103 Return a create time.
1104 ******************************************************************/
1106 struct timespec get_create_timespec(connection_struct *conn,
1107 struct files_struct *fsp,
1108 const struct smb_filename *smb_fname)
1110 return smb_fname->st.st_ex_btime;
1113 /******************************************************************
1114 Return a change time (may look at EA in future).
1115 ******************************************************************/
1117 struct timespec get_change_timespec(connection_struct *conn,
1118 struct files_struct *fsp,
1119 const struct smb_filename *smb_fname)
1121 return smb_fname->st.st_ex_mtime;
1124 /****************************************************************************
1125 Get a real open file handle we can do meta-data operations on. As it's
1126 going to be used under root access only on meta-data we should look for
1127 any existing open file handle first, and use that in preference (also to
1128 avoid kernel self-oplock breaks). If not use an INTERNAL_OPEN_ONLY handle.
1129 ****************************************************************************/
1131 static NTSTATUS get_file_handle_for_metadata(connection_struct *conn,
1132 const struct smb_filename *smb_fname,
1133 files_struct **ret_fsp,
1138 struct file_id file_id;
1139 struct smb_filename *smb_fname_cp = NULL;
1141 *need_close = false;
1143 if (!VALID_STAT(smb_fname->st)) {
1144 return NT_STATUS_INVALID_PARAMETER;
1147 file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1149 for(fsp = file_find_di_first(conn->sconn, file_id);
1151 fsp = file_find_di_next(fsp)) {
1152 if (fsp->fh->fd != -1) {
1154 return NT_STATUS_OK;
1158 smb_fname_cp = cp_smb_filename(talloc_tos(),
1160 if (smb_fname_cp == NULL) {
1161 return NT_STATUS_NO_MEMORY;
1164 /* Opens an INTERNAL_OPEN_ONLY write handle. */
1165 status = SMB_VFS_CREATE_FILE(
1168 0, /* root_dir_fid */
1169 smb_fname_cp, /* fname */
1170 FILE_WRITE_ATTRIBUTES, /* access_mask */
1171 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
1173 FILE_OPEN, /* create_disposition*/
1174 0, /* create_options */
1175 0, /* file_attributes */
1176 INTERNAL_OPEN_ONLY, /* oplock_request */
1178 0, /* allocation_size */
1179 0, /* private_flags */
1182 ret_fsp, /* result */
1184 NULL, NULL); /* create context */
1186 TALLOC_FREE(smb_fname_cp);
1188 if (NT_STATUS_IS_OK(status)) {