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];
474 if (!fsp->update_write_time_on_close) {
478 if (null_timespec(fsp->close_write_time)) {
479 fsp->close_write_time = timespec_current();
482 /* Ensure we have a valid stat struct for the source. */
483 if (fsp->fh->fd != -1) {
484 if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
485 return map_nt_error_from_unix(errno);
488 if (SMB_VFS_STAT(fsp->conn,fsp->fsp_name,&sbuf) == -1) {
489 return map_nt_error_from_unix(errno);
493 if (!VALID_STAT(sbuf)) {
494 /* if it doesn't seem to be a real file */
498 ts[1] = fsp->close_write_time;
499 status = smb_set_file_time(fsp->conn, fsp, fsp->fsp_name,
501 if (!NT_STATUS_IS_OK(status)) {
508 /****************************************************************************
511 close_type can be NORMAL_CLOSE=0,SHUTDOWN_CLOSE,ERROR_CLOSE.
512 printing and magic scripts are only run on normal close.
513 delete on close is done on normal and shutdown close.
514 ****************************************************************************/
516 static NTSTATUS close_normal_file(struct smb_request *req, files_struct *fsp,
517 enum file_close_type close_type)
519 NTSTATUS status = NT_STATUS_OK;
520 NTSTATUS saved_status1 = NT_STATUS_OK;
521 NTSTATUS saved_status2 = NT_STATUS_OK;
522 NTSTATUS saved_status3 = NT_STATUS_OK;
523 NTSTATUS saved_status4 = NT_STATUS_OK;
524 connection_struct *conn = fsp->conn;
526 if (fsp->aio_write_behind) {
528 * If we're finishing write behind on a close we can get a write
529 * error here, we must remember this.
531 int ret = wait_for_aio_completion(fsp);
533 saved_status1 = map_nt_error_from_unix(ret);
536 cancel_aio_by_fsp(fsp);
540 * If we're flushing on a close we can get a write
541 * error here, we must remember this.
544 saved_status2 = close_filestruct(fsp);
546 if (fsp->print_file) {
547 print_fsp_end(fsp, close_type);
552 /* If this is an old DOS or FCB open and we have multiple opens on
553 the same handle we only have one share mode. Ensure we only remove
554 the share mode on the last close. */
556 if (fsp->fh->ref_count == 1) {
557 /* Should we return on error here... ? */
558 saved_status3 = close_remove_share_mode(fsp, close_type);
561 if(fsp->oplock_type) {
562 release_file_oplock(fsp);
565 locking_close_file(smbd_messaging_context(), fsp);
567 status = fd_close(fsp);
569 /* check for magic scripts */
570 if (close_type == NORMAL_CLOSE) {
575 * Ensure pending modtime is set after close.
578 saved_status4 = update_write_time_on_close(fsp);
580 if (NT_STATUS_IS_OK(status)) {
581 if (!NT_STATUS_IS_OK(saved_status1)) {
582 status = saved_status1;
583 } else if (!NT_STATUS_IS_OK(saved_status2)) {
584 status = saved_status2;
585 } else if (!NT_STATUS_IS_OK(saved_status3)) {
586 status = saved_status3;
587 } else if (!NT_STATUS_IS_OK(saved_status4)) {
588 status = saved_status4;
592 DEBUG(2,("%s closed file %s (numopen=%d) %s\n",
593 conn->server_info->unix_name,fsp->fsp_name,
594 conn->num_files_open - 1,
595 nt_errstr(status) ));
601 /****************************************************************************
602 Close a directory opened by an NT SMB call.
603 ****************************************************************************/
605 static NTSTATUS close_directory(struct smb_request *req, files_struct *fsp,
606 enum file_close_type close_type)
608 struct share_mode_lock *lck = 0;
609 bool delete_dir = False;
610 NTSTATUS status = NT_STATUS_OK;
613 * NT can set delete_on_close of the last open
614 * reference to a directory also.
617 lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL,
621 DEBUG(0, ("close_directory: Could not get share mode lock for %s\n", fsp->fsp_name));
622 return NT_STATUS_INVALID_PARAMETER;
625 if (!del_share_mode(lck, fsp)) {
626 DEBUG(0, ("close_directory: Could not delete share entry for %s\n", fsp->fsp_name));
629 if (fsp->initial_delete_on_close) {
630 bool became_user = False;
632 /* Initial delete on close was set - for
633 * directories we don't care if anyone else
634 * wrote a real delete on close. */
636 if (current_user.vuid != fsp->vuid) {
637 become_user(fsp->conn, fsp->vuid);
640 send_stat_cache_delete_message(fsp->fsp_name);
641 set_delete_on_close_lck(lck, True, ¤t_user.ut);
647 delete_dir = lck->delete_on_close;
651 /* See if others still have the dir open. If this is the
652 * case, then don't delete. If all opens are POSIX delete now. */
653 for (i=0; i<lck->num_share_modes; i++) {
654 struct share_mode_entry *e = &lck->share_modes[i];
655 if (is_valid_share_mode_entry(e)) {
656 if (fsp->posix_open && (e->flags & SHARE_MODE_FLAG_POSIX_OPEN)) {
665 if ((close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE) &&
669 /* Become the user who requested the delete. */
671 if (!push_sec_ctx()) {
672 smb_panic("close_directory: failed to push sec_ctx.\n");
675 set_sec_ctx(lck->delete_token->uid,
676 lck->delete_token->gid,
677 lck->delete_token->ngroups,
678 lck->delete_token->groups,
683 status = rmdir_internals(talloc_tos(),
684 fsp->conn, fsp->fsp_name);
686 DEBUG(5,("close_directory: %s. Delete on close was set - "
687 "deleting directory returned %s.\n",
688 fsp->fsp_name, nt_errstr(status)));
694 * Ensure we remove any change notify requests that would
695 * now fail as the directory has been deleted.
698 if(NT_STATUS_IS_OK(status)) {
699 remove_pending_change_notify_requests_by_fid(fsp, NT_STATUS_DELETE_PENDING);
703 remove_pending_change_notify_requests_by_fid(
707 status = fd_close(fsp);
709 if (!NT_STATUS_IS_OK(status)) {
710 DEBUG(0, ("Could not close dir! fname=%s, fd=%d, err=%d=%s\n",
711 fsp->fsp_name, fsp->fh->fd, errno, strerror(errno)));
715 * Do the code common to files and directories.
717 close_filestruct(fsp);
722 /****************************************************************************
723 Close a files_struct.
724 ****************************************************************************/
726 NTSTATUS close_file(struct smb_request *req, files_struct *fsp,
727 enum file_close_type close_type)
730 struct files_struct *base_fsp = fsp->base_fsp;
732 if(fsp->is_directory) {
733 status = close_directory(req, fsp, close_type);
734 } else if (fsp->fake_file_handle != NULL) {
735 status = close_fake_file(req, fsp);
737 status = close_normal_file(req, fsp, close_type);
740 if ((base_fsp != NULL) && (close_type != SHUTDOWN_CLOSE)) {
743 * fsp was a stream, the base fsp can't be a stream as well
745 * For SHUTDOWN_CLOSE this is not possible here, because
746 * SHUTDOWN_CLOSE only happens from files.c which walks the
747 * complete list of files. If we mess with more than one fsp
748 * those loops will become confused.
751 SMB_ASSERT(base_fsp->base_fsp == NULL);
752 close_file(req, base_fsp, close_type);
758 /****************************************************************************
759 Deal with an (authorized) message to close a file given the share mode
761 ****************************************************************************/
763 void msg_close_file(struct messaging_context *msg_ctx,
766 struct server_id server_id,
769 files_struct *fsp = NULL;
770 struct share_mode_entry e;
772 message_to_share_mode_entry(&e, (char *)data->data);
775 char *sm_str = share_mode_str(NULL, 0, &e);
777 smb_panic("talloc failed");
779 DEBUG(10,("msg_close_file: got request to close share mode "
780 "entry %s\n", sm_str));
784 fsp = file_find_dif(e.id, e.share_file_id);
786 DEBUG(10,("msg_close_file: failed to find file.\n"));
789 close_file(NULL, fsp, NORMAL_CLOSE);