2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 1992-2007.
6 Copyright (C) Volker Lendecke 2005
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 extern struct current_user current_user
;
26 /****************************************************************************
27 Run a file if it is a magic script.
28 ****************************************************************************/
30 static void check_magic(struct files_struct
*fsp
)
33 const char *magic_output
= NULL
;
36 TALLOC_CTX
*ctx
= NULL
;
38 struct connection_struct
*conn
= fsp
->conn
;
40 if (!*lp_magicscript(SNUM(conn
))) {
44 DEBUG(5,("checking magic for %s\n",fsp
->fsp_name
));
46 if (!(p
= strrchr_m(fsp
->fsp_name
,'/'))) {
52 if (!strequal(lp_magicscript(SNUM(conn
)),p
)) {
56 ctx
= talloc_stackframe();
58 if (*lp_magicoutput(SNUM(conn
))) {
59 magic_output
= lp_magicoutput(SNUM(conn
));
61 magic_output
= talloc_asprintf(ctx
,
70 /* Ensure we don't depend on user's PATH. */
71 p
= talloc_asprintf(ctx
, "./%s", fsp
->fsp_name
);
77 if (chmod(fsp
->fsp_name
,0755) == -1) {
81 ret
= smbrun(p
,&tmp_fd
);
82 DEBUG(3,("Invoking magic command %s gave %d\n",
85 unlink(fsp
->fsp_name
);
86 if (ret
!= 0 || tmp_fd
== -1) {
93 outfd
= open(magic_output
, O_CREAT
|O_EXCL
|O_RDWR
, 0600);
100 if (sys_fstat(tmp_fd
,&st
) == -1) {
106 transfer_file(tmp_fd
,outfd
,(SMB_OFF_T
)st
.st_size
);
112 /****************************************************************************
113 Common code to close a file or a directory.
114 ****************************************************************************/
116 static NTSTATUS
close_filestruct(files_struct
*fsp
)
118 NTSTATUS status
= NT_STATUS_OK
;
120 if (fsp
->fh
->fd
!= -1) {
121 if(flush_write_cache(fsp
, CLOSE_FLUSH
) == -1) {
122 status
= map_nt_error_from_unix(errno
);
124 delete_write_cache(fsp
);
130 /****************************************************************************
131 If any deferred opens are waiting on this close, notify them.
132 ****************************************************************************/
134 static void notify_deferred_opens(struct share_mode_lock
*lck
)
138 for (i
=0; i
<lck
->num_share_modes
; i
++) {
139 struct share_mode_entry
*e
= &lck
->share_modes
[i
];
141 if (!is_deferred_open_entry(e
)) {
145 if (procid_is_me(&e
->pid
)) {
147 * We need to notify ourself to retry the open. Do
148 * this by finding the queued SMB record, moving it to
149 * the head of the queue and changing the wait time to
152 schedule_deferred_open_smb_message(e
->op_mid
);
154 char msg
[MSG_SMB_SHARE_MODE_ENTRY_SIZE
];
156 share_mode_entry_to_message(msg
, e
);
158 messaging_send_buf(smbd_messaging_context(),
159 e
->pid
, MSG_SMB_OPEN_RETRY
,
161 MSG_SMB_SHARE_MODE_ENTRY_SIZE
);
166 /****************************************************************************
168 ****************************************************************************/
170 NTSTATUS
delete_all_streams(connection_struct
*conn
, const char *fname
)
172 struct stream_struct
*stream_info
;
174 unsigned int num_streams
;
175 TALLOC_CTX
*frame
= talloc_stackframe();
178 status
= SMB_VFS_STREAMINFO(conn
, NULL
, fname
, talloc_tos(),
179 &num_streams
, &stream_info
);
181 if (NT_STATUS_EQUAL(status
, NT_STATUS_NOT_IMPLEMENTED
)) {
182 DEBUG(10, ("no streams around\n"));
187 if (!NT_STATUS_IS_OK(status
)) {
188 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
193 DEBUG(10, ("delete_all_streams found %d streams\n",
196 if (num_streams
== 0) {
201 for (i
=0; i
<num_streams
; i
++) {
205 if (strequal(stream_info
[i
].name
, "::$DATA")) {
209 streamname
= talloc_asprintf(talloc_tos(), "%s%s", fname
,
210 stream_info
[i
].name
);
212 if (streamname
== NULL
) {
213 DEBUG(0, ("talloc_aprintf failed\n"));
214 status
= NT_STATUS_NO_MEMORY
;
218 res
= SMB_VFS_UNLINK(conn
, streamname
);
220 TALLOC_FREE(streamname
);
223 status
= map_nt_error_from_unix(errno
);
224 DEBUG(10, ("Could not delete stream %s: %s\n",
225 streamname
, strerror(errno
)));
235 /****************************************************************************
236 Deal with removing a share mode on last close.
237 ****************************************************************************/
239 static NTSTATUS
close_remove_share_mode(files_struct
*fsp
,
240 enum file_close_type close_type
)
242 connection_struct
*conn
= fsp
->conn
;
243 bool delete_file
= false;
244 bool changed_user
= false;
245 struct share_mode_lock
*lck
;
246 SMB_STRUCT_STAT sbuf
;
247 NTSTATUS status
= NT_STATUS_OK
;
252 * Lock the share entries, and determine if we should delete
253 * on close. If so delete whilst the lock is still in effect.
254 * This prevents race conditions with the file being created. JRA.
257 lck
= get_share_mode_lock(talloc_tos(), fsp
->file_id
, NULL
, NULL
,
261 DEBUG(0, ("close_remove_share_mode: Could not get share mode "
262 "lock for file %s\n", fsp
->fsp_name
));
263 return NT_STATUS_INVALID_PARAMETER
;
266 if (fsp
->write_time_forced
) {
267 set_close_write_time(fsp
, lck
->changed_write_time
);
270 if (!del_share_mode(lck
, fsp
)) {
271 DEBUG(0, ("close_remove_share_mode: Could not delete share "
272 "entry for file %s\n", fsp
->fsp_name
));
275 if (fsp
->initial_delete_on_close
&& (lck
->delete_token
== NULL
)) {
276 bool became_user
= False
;
278 /* Initial delete on close was set and no one else
279 * wrote a real delete on close. */
281 if (current_user
.vuid
!= fsp
->vuid
) {
282 become_user(conn
, fsp
->vuid
);
285 set_delete_on_close_lck(lck
, True
, ¤t_user
.ut
);
291 delete_file
= lck
->delete_on_close
;
295 /* See if others still have the file open. If this is the
296 * case, then don't delete. If all opens are POSIX delete now. */
297 for (i
=0; i
<lck
->num_share_modes
; i
++) {
298 struct share_mode_entry
*e
= &lck
->share_modes
[i
];
299 if (is_valid_share_mode_entry(e
)) {
300 if (fsp
->posix_open
&& (e
->flags
& SHARE_MODE_FLAG_POSIX_OPEN
)) {
309 /* Notify any deferred opens waiting on this close. */
310 notify_deferred_opens(lck
);
311 reply_to_oplock_break_requests(fsp
);
314 * NT can set delete_on_close of the last open
315 * reference to a file.
318 if (!(close_type
== NORMAL_CLOSE
|| close_type
== SHUTDOWN_CLOSE
)
320 || (lck
->delete_token
== NULL
)) {
326 * Ok, we have to delete the file
329 DEBUG(5,("close_remove_share_mode: file %s. Delete on close was set "
330 "- deleting file.\n", fsp
->fsp_name
));
333 * Don't try to update the write time when we delete the file
335 fsp
->update_write_time_on_close
= false;
337 if (!unix_token_equal(lck
->delete_token
, ¤t_user
.ut
)) {
338 /* Become the user who requested the delete. */
340 DEBUG(5,("close_remove_share_mode: file %s. "
341 "Change user to uid %u\n",
343 (unsigned int)lck
->delete_token
->uid
));
345 if (!push_sec_ctx()) {
346 smb_panic("close_remove_share_mode: file %s. failed to push "
350 set_sec_ctx(lck
->delete_token
->uid
,
351 lck
->delete_token
->gid
,
352 lck
->delete_token
->ngroups
,
353 lck
->delete_token
->groups
,
359 /* We can only delete the file if the name we have is still valid and
360 hasn't been renamed. */
362 if (fsp
->posix_open
) {
363 ret
= SMB_VFS_LSTAT(conn
,fsp
->fsp_name
,&sbuf
);
365 ret
= SMB_VFS_STAT(conn
,fsp
->fsp_name
,&sbuf
);
369 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
370 "was set and stat failed with error %s\n",
371 fsp
->fsp_name
, strerror(errno
) ));
373 * Don't save the errno here, we ignore this error
378 id
= vfs_file_id_from_sbuf(conn
, &sbuf
);
380 if (!file_id_equal(&fsp
->file_id
, &id
)) {
381 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
382 "was set and dev and/or inode does not match\n",
384 DEBUG(5,("close_remove_share_mode: file %s. stored file_id %s, "
387 file_id_string_tos(&fsp
->file_id
),
388 file_id_string_tos(&id
)));
390 * Don't save the errno here, we ignore this error
395 if ((conn
->fs_capabilities
& FILE_NAMED_STREAMS
)
396 && !is_ntfs_stream_name(fsp
->fsp_name
)) {
398 status
= delete_all_streams(conn
, fsp
->fsp_name
);
400 if (!NT_STATUS_IS_OK(status
)) {
401 DEBUG(5, ("delete_all_streams failed: %s\n",
408 if (SMB_VFS_UNLINK(conn
,fsp
->fsp_name
) != 0) {
410 * This call can potentially fail as another smbd may
411 * have had the file open with delete on close set and
412 * deleted it when its last reference to this file
413 * went away. Hence we log this but not at debug level
417 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
418 "was set and unlink failed with error %s\n",
419 fsp
->fsp_name
, strerror(errno
) ));
421 status
= map_nt_error_from_unix(errno
);
424 notify_fname(conn
, NOTIFY_ACTION_REMOVED
,
425 FILE_NOTIFY_CHANGE_FILE_NAME
,
428 /* As we now have POSIX opens which can unlink
429 * with other open files we may have taken
430 * this code path with more than one share mode
431 * entry - ensure we only delete once by resetting
432 * the delete on close flag. JRA.
435 set_delete_on_close_lck(lck
, False
, NULL
);
448 void set_close_write_time(struct files_struct
*fsp
, struct timespec ts
)
450 DEBUG(6,("close_write_time: %s" , time_to_asc(convert_timespec_to_time_t(ts
))));
452 if (null_timespec(ts
)) {
456 * if the write time on close is explict set, then don't
457 * need to fix it up to the value in the locking db
459 fsp
->write_time_forced
= false;
461 fsp
->update_write_time_on_close
= true;
462 fsp
->close_write_time
= ts
;
465 static NTSTATUS
update_write_time_on_close(struct files_struct
*fsp
)
467 SMB_STRUCT_STAT sbuf
;
468 struct timespec ts
[2];
475 if (!fsp
->update_write_time_on_close
) {
479 if (null_timespec(fsp
->close_write_time
)) {
480 fsp
->close_write_time
= timespec_current();
483 /* Ensure we have a valid stat struct for the source. */
484 if (fsp
->fh
->fd
!= -1) {
485 ret
= SMB_VFS_FSTAT(fsp
, &sbuf
);
487 if (fsp
->posix_open
) {
488 ret
= SMB_VFS_LSTAT(fsp
->conn
,fsp
->fsp_name
,&sbuf
);
490 ret
= SMB_VFS_STAT(fsp
->conn
,fsp
->fsp_name
,&sbuf
);
495 return map_nt_error_from_unix(errno
);
498 if (!VALID_STAT(sbuf
)) {
499 /* if it doesn't seem to be a real file */
503 ts
[1] = fsp
->close_write_time
;
504 status
= smb_set_file_time(fsp
->conn
, fsp
, fsp
->fsp_name
,
506 if (!NT_STATUS_IS_OK(status
)) {
513 /****************************************************************************
516 close_type can be NORMAL_CLOSE=0,SHUTDOWN_CLOSE,ERROR_CLOSE.
517 printing and magic scripts are only run on normal close.
518 delete on close is done on normal and shutdown close.
519 ****************************************************************************/
521 static NTSTATUS
close_normal_file(files_struct
*fsp
, enum file_close_type close_type
)
523 NTSTATUS status
= NT_STATUS_OK
;
524 NTSTATUS saved_status1
= NT_STATUS_OK
;
525 NTSTATUS saved_status2
= NT_STATUS_OK
;
526 NTSTATUS saved_status3
= NT_STATUS_OK
;
527 NTSTATUS saved_status4
= NT_STATUS_OK
;
528 connection_struct
*conn
= fsp
->conn
;
530 if (fsp
->aio_write_behind
) {
532 * If we're finishing write behind on a close we can get a write
533 * error here, we must remember this.
535 int ret
= wait_for_aio_completion(fsp
);
537 saved_status1
= map_nt_error_from_unix(ret
);
540 cancel_aio_by_fsp(fsp
);
544 * If we're flushing on a close we can get a write
545 * error here, we must remember this.
548 saved_status2
= close_filestruct(fsp
);
550 if (fsp
->print_file
) {
551 print_fsp_end(fsp
, close_type
);
556 /* If this is an old DOS or FCB open and we have multiple opens on
557 the same handle we only have one share mode. Ensure we only remove
558 the share mode on the last close. */
560 if (fsp
->fh
->ref_count
== 1) {
561 /* Should we return on error here... ? */
562 saved_status3
= close_remove_share_mode(fsp
, close_type
);
565 if(fsp
->oplock_type
) {
566 release_file_oplock(fsp
);
569 locking_close_file(smbd_messaging_context(), fsp
);
571 status
= fd_close(fsp
);
573 /* check for magic scripts */
574 if (close_type
== NORMAL_CLOSE
) {
579 * Ensure pending modtime is set after close.
582 saved_status4
= update_write_time_on_close(fsp
);
583 if (NT_STATUS_EQUAL(saved_status4
, NT_STATUS_OBJECT_NAME_NOT_FOUND
)) {
584 /* Someone renamed the file or a parent directory containing
585 * this file. We can't do anything about this, we don't have
586 * an "update timestamp by fd" call in POSIX. Eat the error. */
588 saved_status4
= NT_STATUS_OK
;
591 if (NT_STATUS_IS_OK(status
)) {
592 if (!NT_STATUS_IS_OK(saved_status1
)) {
593 status
= saved_status1
;
594 } else if (!NT_STATUS_IS_OK(saved_status2
)) {
595 status
= saved_status2
;
596 } else if (!NT_STATUS_IS_OK(saved_status3
)) {
597 status
= saved_status3
;
598 } else if (!NT_STATUS_IS_OK(saved_status4
)) {
599 status
= saved_status4
;
603 DEBUG(2,("%s closed file %s (numopen=%d) %s\n",
604 conn
->user
,fsp
->fsp_name
,
605 conn
->num_files_open
- 1,
606 nt_errstr(status
) ));
612 /****************************************************************************
613 Close a directory opened by an NT SMB call.
614 ****************************************************************************/
616 static NTSTATUS
close_directory(files_struct
*fsp
, enum file_close_type close_type
)
618 struct share_mode_lock
*lck
= 0;
619 bool delete_dir
= False
;
620 NTSTATUS status
= NT_STATUS_OK
;
623 * NT can set delete_on_close of the last open
624 * reference to a directory also.
627 lck
= get_share_mode_lock(talloc_tos(), fsp
->file_id
, NULL
, NULL
,
631 DEBUG(0, ("close_directory: Could not get share mode lock for %s\n", fsp
->fsp_name
));
632 return NT_STATUS_INVALID_PARAMETER
;
635 if (!del_share_mode(lck
, fsp
)) {
636 DEBUG(0, ("close_directory: Could not delete share entry for %s\n", fsp
->fsp_name
));
639 if (fsp
->initial_delete_on_close
) {
640 bool became_user
= False
;
642 /* Initial delete on close was set - for
643 * directories we don't care if anyone else
644 * wrote a real delete on close. */
646 if (current_user
.vuid
!= fsp
->vuid
) {
647 become_user(fsp
->conn
, fsp
->vuid
);
650 send_stat_cache_delete_message(fsp
->fsp_name
);
651 set_delete_on_close_lck(lck
, True
, ¤t_user
.ut
);
657 delete_dir
= lck
->delete_on_close
;
661 /* See if others still have the dir open. If this is the
662 * case, then don't delete. If all opens are POSIX delete now. */
663 for (i
=0; i
<lck
->num_share_modes
; i
++) {
664 struct share_mode_entry
*e
= &lck
->share_modes
[i
];
665 if (is_valid_share_mode_entry(e
)) {
666 if (fsp
->posix_open
&& (e
->flags
& SHARE_MODE_FLAG_POSIX_OPEN
)) {
675 if ((close_type
== NORMAL_CLOSE
|| close_type
== SHUTDOWN_CLOSE
) &&
679 /* Become the user who requested the delete. */
681 if (!push_sec_ctx()) {
682 smb_panic("close_directory: failed to push sec_ctx.\n");
685 set_sec_ctx(lck
->delete_token
->uid
,
686 lck
->delete_token
->gid
,
687 lck
->delete_token
->ngroups
,
688 lck
->delete_token
->groups
,
693 status
= rmdir_internals(talloc_tos(),
694 fsp
->conn
, fsp
->fsp_name
);
696 DEBUG(5,("close_directory: %s. Delete on close was set - "
697 "deleting directory returned %s.\n",
698 fsp
->fsp_name
, nt_errstr(status
)));
704 * Ensure we remove any change notify requests that would
705 * now fail as the directory has been deleted.
708 if(NT_STATUS_IS_OK(status
)) {
709 remove_pending_change_notify_requests_by_fid(fsp
, NT_STATUS_DELETE_PENDING
);
713 remove_pending_change_notify_requests_by_fid(
718 * Do the code common to files and directories.
720 close_filestruct(fsp
);
725 /****************************************************************************
726 Close a 'stat file' opened internally.
727 ****************************************************************************/
729 static NTSTATUS
close_stat(files_struct
*fsp
)
732 * Do the code common to files and directories.
734 close_filestruct(fsp
);
739 /****************************************************************************
740 Close a files_struct.
741 ****************************************************************************/
743 NTSTATUS
close_file(files_struct
*fsp
, enum file_close_type close_type
)
746 struct files_struct
*base_fsp
= fsp
->base_fsp
;
748 if(fsp
->is_directory
) {
749 status
= close_directory(fsp
, close_type
);
750 } else if (fsp
->is_stat
) {
751 status
= close_stat(fsp
);
752 } else if (fsp
->fake_file_handle
!= NULL
) {
753 status
= close_fake_file(fsp
);
755 status
= close_normal_file(fsp
, close_type
);
758 if ((base_fsp
!= NULL
) && (close_type
!= SHUTDOWN_CLOSE
)) {
761 * fsp was a stream, the base fsp can't be a stream as well
763 * For SHUTDOWN_CLOSE this is not possible here, because
764 * SHUTDOWN_CLOSE only happens from files.c which walks the
765 * complete list of files. If we mess with more than one fsp
766 * those loops will become confused.
769 SMB_ASSERT(base_fsp
->base_fsp
== NULL
);
770 close_file(base_fsp
, close_type
);
776 /****************************************************************************
777 Deal with an (authorized) message to close a file given the share mode
779 ****************************************************************************/
781 void msg_close_file(struct messaging_context
*msg_ctx
,
784 struct server_id server_id
,
787 files_struct
*fsp
= NULL
;
788 struct share_mode_entry e
;
790 message_to_share_mode_entry(&e
, (char *)data
->data
);
793 char *sm_str
= share_mode_str(NULL
, 0, &e
);
795 smb_panic("talloc failed");
797 DEBUG(10,("msg_close_file: got request to close share mode "
798 "entry %s\n", sm_str
));
802 fsp
= file_find_dif(e
.id
, e
.share_file_id
);
804 DEBUG(10,("msg_close_file: failed to find file.\n"));
807 close_file(fsp
, NORMAL_CLOSE
);