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 chmod(fsp->fsp_name,0755);
71 ret = smbrun(fsp->fsp_name,&tmp_fd);
72 DEBUG(3,("Invoking magic command %s gave %d\n",
75 unlink(fsp->fsp_name);
76 if (ret != 0 || tmp_fd == -1) {
83 outfd = open(magic_output, O_CREAT|O_EXCL|O_RDWR, 0600);
90 if (sys_fstat(tmp_fd,&st) == -1) {
96 transfer_file(tmp_fd,outfd,(SMB_OFF_T)st.st_size);
102 /****************************************************************************
103 Common code to close a file or a directory.
104 ****************************************************************************/
106 static NTSTATUS close_filestruct(files_struct *fsp)
108 NTSTATUS status = NT_STATUS_OK;
109 connection_struct *conn = fsp->conn;
111 if (fsp->fh->fd != -1) {
112 if(flush_write_cache(fsp, CLOSE_FLUSH) == -1) {
113 status = map_nt_error_from_unix(errno);
115 delete_write_cache(fsp);
118 conn->num_files_open--;
122 /****************************************************************************
123 If any deferred opens are waiting on this close, notify them.
124 ****************************************************************************/
126 static void notify_deferred_opens(struct share_mode_lock *lck)
130 for (i=0; i<lck->num_share_modes; i++) {
131 struct share_mode_entry *e = &lck->share_modes[i];
133 if (!is_deferred_open_entry(e)) {
137 if (procid_is_me(&e->pid)) {
139 * We need to notify ourself to retry the open. Do
140 * this by finding the queued SMB record, moving it to
141 * the head of the queue and changing the wait time to
144 schedule_deferred_open_smb_message(e->op_mid);
146 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
148 share_mode_entry_to_message(msg, e);
150 messaging_send_buf(smbd_messaging_context(),
151 e->pid, MSG_SMB_OPEN_RETRY,
153 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
158 /****************************************************************************
160 ****************************************************************************/
162 static NTSTATUS delete_all_streams(connection_struct *conn, const char *fname)
164 struct stream_struct *stream_info;
166 unsigned int num_streams;
167 TALLOC_CTX *frame = talloc_stackframe();
170 status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
171 &num_streams, &stream_info);
173 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)) {
174 DEBUG(10, ("no streams around\n"));
179 if (!NT_STATUS_IS_OK(status)) {
180 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
185 DEBUG(10, ("delete_all_streams found %d streams\n",
188 if (num_streams == 0) {
193 for (i=0; i<num_streams; i++) {
197 if (strequal(stream_info[i].name, "::$DATA")) {
201 streamname = talloc_asprintf(talloc_tos(), "%s%s", fname,
202 stream_info[i].name);
204 if (streamname == NULL) {
205 DEBUG(0, ("talloc_aprintf failed\n"));
206 status = NT_STATUS_NO_MEMORY;
210 res = SMB_VFS_UNLINK(conn, streamname);
212 TALLOC_FREE(streamname);
215 status = map_nt_error_from_unix(errno);
216 DEBUG(10, ("Could not delete stream %s: %s\n",
217 streamname, strerror(errno)));
227 /****************************************************************************
228 Deal with removing a share mode on last close.
229 ****************************************************************************/
231 static NTSTATUS close_remove_share_mode(files_struct *fsp,
232 enum file_close_type close_type)
234 connection_struct *conn = fsp->conn;
235 bool delete_file = false;
236 bool changed_user = false;
237 struct share_mode_lock *lck;
238 SMB_STRUCT_STAT sbuf;
239 NTSTATUS status = NT_STATUS_OK;
244 * Lock the share entries, and determine if we should delete
245 * on close. If so delete whilst the lock is still in effect.
246 * This prevents race conditions with the file being created. JRA.
249 lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL,
253 DEBUG(0, ("close_remove_share_mode: Could not get share mode "
254 "lock for file %s\n", fsp->fsp_name));
255 return NT_STATUS_INVALID_PARAMETER;
258 if (fsp->write_time_forced) {
259 set_close_write_time(fsp, lck->changed_write_time);
262 if (!del_share_mode(lck, fsp)) {
263 DEBUG(0, ("close_remove_share_mode: Could not delete share "
264 "entry for file %s\n", fsp->fsp_name));
267 if (fsp->initial_delete_on_close && (lck->delete_token == NULL)) {
268 bool became_user = False;
270 /* Initial delete on close was set and no one else
271 * wrote a real delete on close. */
273 if (current_user.vuid != fsp->vuid) {
274 become_user(conn, fsp->vuid);
277 set_delete_on_close_lck(lck, True, ¤t_user.ut);
283 delete_file = lck->delete_on_close;
287 /* See if others still have the file open. If this is the
288 * case, then don't delete. If all opens are POSIX delete now. */
289 for (i=0; i<lck->num_share_modes; i++) {
290 struct share_mode_entry *e = &lck->share_modes[i];
291 if (is_valid_share_mode_entry(e)) {
292 if (fsp->posix_open && (e->flags & SHARE_MODE_FLAG_POSIX_OPEN)) {
301 /* Notify any deferred opens waiting on this close. */
302 notify_deferred_opens(lck);
303 reply_to_oplock_break_requests(fsp);
306 * NT can set delete_on_close of the last open
307 * reference to a file.
310 if (!(close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE)
312 || (lck->delete_token == NULL)) {
318 * Ok, we have to delete the file
321 DEBUG(5,("close_remove_share_mode: file %s. Delete on close was set "
322 "- deleting file.\n", fsp->fsp_name));
325 * Don't try to update the write time when we delete the file
327 fsp->update_write_time_on_close = false;
329 if (!unix_token_equal(lck->delete_token, ¤t_user.ut)) {
330 /* Become the user who requested the delete. */
332 DEBUG(5,("close_remove_share_mode: file %s. "
333 "Change user to uid %u\n",
335 (unsigned int)lck->delete_token->uid));
337 if (!push_sec_ctx()) {
338 smb_panic("close_remove_share_mode: file %s. failed to push "
342 set_sec_ctx(lck->delete_token->uid,
343 lck->delete_token->gid,
344 lck->delete_token->ngroups,
345 lck->delete_token->groups,
351 /* We can only delete the file if the name we have is still valid and
352 hasn't been renamed. */
354 if (fsp->posix_open) {
355 ret = SMB_VFS_LSTAT(conn,fsp->fsp_name,&sbuf);
357 ret = SMB_VFS_STAT(conn,fsp->fsp_name,&sbuf);
361 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
362 "was set and stat failed with error %s\n",
363 fsp->fsp_name, strerror(errno) ));
365 * Don't save the errno here, we ignore this error
370 id = vfs_file_id_from_sbuf(conn, &sbuf);
372 if (!file_id_equal(&fsp->file_id, &id)) {
373 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
374 "was set and dev and/or inode does not match\n",
376 DEBUG(5,("close_remove_share_mode: file %s. stored file_id %s, "
379 file_id_string_tos(&fsp->file_id),
380 file_id_string_tos(&id)));
382 * Don't save the errno here, we ignore this error
387 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
388 && !is_ntfs_stream_name(fsp->fsp_name)) {
390 status = delete_all_streams(conn, fsp->fsp_name);
392 if (!NT_STATUS_IS_OK(status)) {
393 DEBUG(5, ("delete_all_streams failed: %s\n",
400 if (SMB_VFS_UNLINK(conn,fsp->fsp_name) != 0) {
402 * This call can potentially fail as another smbd may
403 * have had the file open with delete on close set and
404 * deleted it when its last reference to this file
405 * went away. Hence we log this but not at debug level
409 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
410 "was set and unlink failed with error %s\n",
411 fsp->fsp_name, strerror(errno) ));
413 status = map_nt_error_from_unix(errno);
416 notify_fname(conn, NOTIFY_ACTION_REMOVED,
417 FILE_NOTIFY_CHANGE_FILE_NAME,
420 /* As we now have POSIX opens which can unlink
421 * with other open files we may have taken
422 * this code path with more than one share mode
423 * entry - ensure we only delete once by resetting
424 * the delete on close flag. JRA.
427 set_delete_on_close_lck(lck, False, NULL);
440 void set_close_write_time(struct files_struct *fsp, struct timespec ts)
442 DEBUG(6,("close_write_time: %s" , time_to_asc(convert_timespec_to_time_t(ts))));
444 if (null_timespec(ts)) {
448 * if the write time on close is explict set, then don't
449 * need to fix it up to the value in the locking db
451 fsp->write_time_forced = false;
453 fsp->update_write_time_on_close = true;
454 fsp->close_write_time = ts;
457 static NTSTATUS update_write_time_on_close(struct files_struct *fsp)
459 SMB_STRUCT_STAT sbuf;
460 struct timespec ts[2];
466 if (!fsp->update_write_time_on_close) {
470 if (null_timespec(fsp->close_write_time)) {
471 fsp->close_write_time = timespec_current();
474 /* Ensure we have a valid stat struct for the source. */
475 if (fsp->fh->fd != -1) {
476 if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
477 return map_nt_error_from_unix(errno);
480 if (SMB_VFS_STAT(fsp->conn,fsp->fsp_name,&sbuf) == -1) {
481 return map_nt_error_from_unix(errno);
485 if (!VALID_STAT(sbuf)) {
486 /* if it doesn't seem to be a real file */
490 ts[1] = fsp->close_write_time;
491 status = smb_set_file_time(fsp->conn, fsp, fsp->fsp_name,
493 if (!NT_STATUS_IS_OK(status)) {
500 /****************************************************************************
503 close_type can be NORMAL_CLOSE=0,SHUTDOWN_CLOSE,ERROR_CLOSE.
504 printing and magic scripts are only run on normal close.
505 delete on close is done on normal and shutdown close.
506 ****************************************************************************/
508 static NTSTATUS close_normal_file(struct smb_request *req, files_struct *fsp,
509 enum file_close_type close_type)
511 NTSTATUS status = NT_STATUS_OK;
512 NTSTATUS saved_status1 = NT_STATUS_OK;
513 NTSTATUS saved_status2 = NT_STATUS_OK;
514 NTSTATUS saved_status3 = NT_STATUS_OK;
515 NTSTATUS saved_status4 = NT_STATUS_OK;
516 connection_struct *conn = fsp->conn;
518 if (fsp->aio_write_behind) {
520 * If we're finishing write behind on a close we can get a write
521 * error here, we must remember this.
523 int ret = wait_for_aio_completion(fsp);
525 saved_status1 = map_nt_error_from_unix(ret);
528 cancel_aio_by_fsp(fsp);
532 * If we're flushing on a close we can get a write
533 * error here, we must remember this.
536 saved_status2 = close_filestruct(fsp);
538 if (fsp->print_file) {
539 print_fsp_end(fsp, close_type);
544 /* If this is an old DOS or FCB open and we have multiple opens on
545 the same handle we only have one share mode. Ensure we only remove
546 the share mode on the last close. */
548 if (fsp->fh->ref_count == 1) {
549 /* Should we return on error here... ? */
550 saved_status3 = close_remove_share_mode(fsp, close_type);
553 if(fsp->oplock_type) {
554 release_file_oplock(fsp);
557 locking_close_file(smbd_messaging_context(), fsp);
559 status = fd_close(fsp);
561 /* check for magic scripts */
562 if (close_type == NORMAL_CLOSE) {
567 * Ensure pending modtime is set after close.
570 saved_status4 = update_write_time_on_close(fsp);
572 if (NT_STATUS_IS_OK(status)) {
573 if (!NT_STATUS_IS_OK(saved_status1)) {
574 status = saved_status1;
575 } else if (!NT_STATUS_IS_OK(saved_status2)) {
576 status = saved_status2;
577 } else if (!NT_STATUS_IS_OK(saved_status3)) {
578 status = saved_status3;
579 } else if (!NT_STATUS_IS_OK(saved_status4)) {
580 status = saved_status4;
584 DEBUG(2,("%s closed file %s (numopen=%d) %s\n",
585 conn->server_info->unix_name,fsp->fsp_name,
586 conn->num_files_open,
587 nt_errstr(status) ));
593 /****************************************************************************
594 Close a directory opened by an NT SMB call.
595 ****************************************************************************/
597 static NTSTATUS close_directory(struct smb_request *req, files_struct *fsp,
598 enum file_close_type close_type)
600 struct share_mode_lock *lck = 0;
601 bool delete_dir = False;
602 NTSTATUS status = NT_STATUS_OK;
605 * NT can set delete_on_close of the last open
606 * reference to a directory also.
609 lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL,
613 DEBUG(0, ("close_directory: Could not get share mode lock for %s\n", fsp->fsp_name));
614 return NT_STATUS_INVALID_PARAMETER;
617 if (!del_share_mode(lck, fsp)) {
618 DEBUG(0, ("close_directory: Could not delete share entry for %s\n", fsp->fsp_name));
621 if (fsp->initial_delete_on_close) {
622 bool became_user = False;
624 /* Initial delete on close was set - for
625 * directories we don't care if anyone else
626 * wrote a real delete on close. */
628 if (current_user.vuid != fsp->vuid) {
629 become_user(fsp->conn, fsp->vuid);
632 send_stat_cache_delete_message(fsp->fsp_name);
633 set_delete_on_close_lck(lck, True, ¤t_user.ut);
639 delete_dir = lck->delete_on_close;
643 /* See if others still have the dir open. If this is the
644 * case, then don't delete. If all opens are POSIX delete now. */
645 for (i=0; i<lck->num_share_modes; i++) {
646 struct share_mode_entry *e = &lck->share_modes[i];
647 if (is_valid_share_mode_entry(e)) {
648 if (fsp->posix_open && (e->flags & SHARE_MODE_FLAG_POSIX_OPEN)) {
657 if ((close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE) &&
661 /* Become the user who requested the delete. */
663 if (!push_sec_ctx()) {
664 smb_panic("close_directory: failed to push sec_ctx.\n");
667 set_sec_ctx(lck->delete_token->uid,
668 lck->delete_token->gid,
669 lck->delete_token->ngroups,
670 lck->delete_token->groups,
675 status = rmdir_internals(talloc_tos(),
676 fsp->conn, fsp->fsp_name);
678 DEBUG(5,("close_directory: %s. Delete on close was set - "
679 "deleting directory returned %s.\n",
680 fsp->fsp_name, nt_errstr(status)));
686 * Ensure we remove any change notify requests that would
687 * now fail as the directory has been deleted.
690 if(NT_STATUS_IS_OK(status)) {
691 remove_pending_change_notify_requests_by_fid(fsp, NT_STATUS_DELETE_PENDING);
695 remove_pending_change_notify_requests_by_fid(
700 * Do the code common to files and directories.
702 close_filestruct(fsp);
707 /****************************************************************************
708 Close a files_struct.
709 ****************************************************************************/
711 NTSTATUS close_file(struct smb_request *req, files_struct *fsp,
712 enum file_close_type close_type)
715 struct files_struct *base_fsp = fsp->base_fsp;
717 if(fsp->is_directory) {
718 status = close_directory(req, fsp, close_type);
719 } else if (fsp->fake_file_handle != NULL) {
720 status = close_fake_file(req, fsp);
722 status = close_normal_file(req, fsp, close_type);
725 if ((base_fsp != NULL) && (close_type != SHUTDOWN_CLOSE)) {
728 * fsp was a stream, the base fsp can't be a stream as well
730 * For SHUTDOWN_CLOSE this is not possible here, because
731 * SHUTDOWN_CLOSE only happens from files.c which walks the
732 * complete list of files. If we mess with more than one fsp
733 * those loops will become confused.
736 SMB_ASSERT(base_fsp->base_fsp == NULL);
737 close_file(req, base_fsp, close_type);
743 /****************************************************************************
744 Deal with an (authorized) message to close a file given the share mode
746 ****************************************************************************/
748 void msg_close_file(struct messaging_context *msg_ctx,
751 struct server_id server_id,
754 files_struct *fsp = NULL;
755 struct share_mode_entry e;
757 message_to_share_mode_entry(&e, (char *)data->data);
760 char *sm_str = share_mode_str(NULL, 0, &e);
762 smb_panic("talloc failed");
764 DEBUG(10,("msg_close_file: got request to close share mode "
765 "entry %s\n", sm_str));
769 fsp = file_find_dif(e.id, e.share_file_id);
771 DEBUG(10,("msg_close_file: failed to find file.\n"));
774 close_file(NULL, fsp, NORMAL_CLOSE);