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 NTSTATUS check_magic(struct files_struct *fsp)
33 const char *magic_output = NULL;
36 TALLOC_CTX *ctx = NULL;
38 struct connection_struct *conn = fsp->conn;
42 if (!*lp_magicscript(SNUM(conn))) {
46 DEBUG(5,("checking magic for %s\n", fsp_str_dbg(fsp)));
48 ctx = talloc_stackframe();
50 status = get_full_smb_filename(ctx, fsp->fsp_name, &fname);
51 if (!NT_STATUS_IS_OK(status)) {
55 if (!(p = strrchr_m(fname,'/'))) {
61 if (!strequal(lp_magicscript(SNUM(conn)),p)) {
62 status = NT_STATUS_OK;
66 if (*lp_magicoutput(SNUM(conn))) {
67 magic_output = lp_magicoutput(SNUM(conn));
69 magic_output = talloc_asprintf(ctx,
74 status = NT_STATUS_NO_MEMORY;
78 /* Ensure we don't depend on user's PATH. */
79 p = talloc_asprintf(ctx, "./%s", fname);
81 status = NT_STATUS_NO_MEMORY;
85 if (chmod(fname, 0755) == -1) {
86 status = map_nt_error_from_unix(errno);
89 ret = smbrun(p,&tmp_fd);
90 DEBUG(3,("Invoking magic command %s gave %d\n",
94 if (ret != 0 || tmp_fd == -1) {
98 status = NT_STATUS_UNSUCCESSFUL;
101 outfd = open(magic_output, O_CREAT|O_EXCL|O_RDWR, 0600);
105 status = map_nt_error_from_unix(err);
109 if (sys_fstat(tmp_fd,&st) == -1) {
113 status = map_nt_error_from_unix(err);
117 if (transfer_file(tmp_fd,outfd,(SMB_OFF_T)st.st_ex_size) == (SMB_OFF_T)-1) {
121 status = map_nt_error_from_unix(err);
125 if (close(outfd) == -1) {
126 status = map_nt_error_from_unix(errno);
130 status = NT_STATUS_OK;
137 /****************************************************************************
138 Common code to close a file or a directory.
139 ****************************************************************************/
141 static NTSTATUS close_filestruct(files_struct *fsp)
143 NTSTATUS status = NT_STATUS_OK;
145 if (fsp->fh->fd != -1) {
146 if(flush_write_cache(fsp, CLOSE_FLUSH) == -1) {
147 status = map_nt_error_from_unix(errno);
149 delete_write_cache(fsp);
155 /****************************************************************************
156 If any deferred opens are waiting on this close, notify them.
157 ****************************************************************************/
159 static void notify_deferred_opens(struct share_mode_lock *lck)
163 if (!should_notify_deferred_opens()) {
167 for (i=0; i<lck->num_share_modes; i++) {
168 struct share_mode_entry *e = &lck->share_modes[i];
170 if (!is_deferred_open_entry(e)) {
174 if (procid_is_me(&e->pid)) {
176 * We need to notify ourself to retry the open. Do
177 * this by finding the queued SMB record, moving it to
178 * the head of the queue and changing the wait time to
181 schedule_deferred_open_smb_message(e->op_mid);
183 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
185 share_mode_entry_to_message(msg, e);
187 messaging_send_buf(smbd_messaging_context(),
188 e->pid, MSG_SMB_OPEN_RETRY,
190 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
195 /****************************************************************************
197 ****************************************************************************/
199 NTSTATUS delete_all_streams(connection_struct *conn, const char *fname)
201 struct stream_struct *stream_info;
203 unsigned int num_streams;
204 TALLOC_CTX *frame = talloc_stackframe();
207 status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
208 &num_streams, &stream_info);
210 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)) {
211 DEBUG(10, ("no streams around\n"));
216 if (!NT_STATUS_IS_OK(status)) {
217 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
222 DEBUG(10, ("delete_all_streams found %d streams\n",
225 if (num_streams == 0) {
230 for (i=0; i<num_streams; i++) {
232 struct smb_filename *smb_fname_stream = NULL;
234 if (strequal(stream_info[i].name, "::$DATA")) {
238 status = create_synthetic_smb_fname(talloc_tos(), fname,
239 stream_info[i].name, NULL,
242 if (!NT_STATUS_IS_OK(status)) {
243 DEBUG(0, ("talloc_aprintf failed\n"));
247 res = SMB_VFS_UNLINK(conn, smb_fname_stream);
250 status = map_nt_error_from_unix(errno);
251 DEBUG(10, ("Could not delete stream %s: %s\n",
252 smb_fname_str_dbg(smb_fname_stream),
254 TALLOC_FREE(smb_fname_stream);
257 TALLOC_FREE(smb_fname_stream);
265 /****************************************************************************
266 Deal with removing a share mode on last close.
267 ****************************************************************************/
269 static NTSTATUS close_remove_share_mode(files_struct *fsp,
270 enum file_close_type close_type)
272 connection_struct *conn = fsp->conn;
273 bool delete_file = false;
274 bool changed_user = false;
275 struct share_mode_lock *lck = NULL;
276 NTSTATUS status = NT_STATUS_OK;
281 * Lock the share entries, and determine if we should delete
282 * on close. If so delete whilst the lock is still in effect.
283 * This prevents race conditions with the file being created. JRA.
286 lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL,
290 DEBUG(0, ("close_remove_share_mode: Could not get share mode "
291 "lock for file %s\n", fsp_str_dbg(fsp)));
292 status = NT_STATUS_INVALID_PARAMETER;
296 if (fsp->write_time_forced) {
297 set_close_write_time(fsp, lck->changed_write_time);
300 if (!del_share_mode(lck, fsp)) {
301 DEBUG(0, ("close_remove_share_mode: Could not delete share "
302 "entry for file %s\n",
306 if (fsp->initial_delete_on_close && (lck->delete_token == NULL)) {
307 bool became_user = False;
309 /* Initial delete on close was set and no one else
310 * wrote a real delete on close. */
312 if (current_user.vuid != fsp->vuid) {
313 become_user(conn, fsp->vuid);
316 set_delete_on_close_lck(lck, True, ¤t_user.ut);
322 delete_file = lck->delete_on_close;
326 /* See if others still have the file open. If this is the
327 * case, then don't delete. If all opens are POSIX delete now. */
328 for (i=0; i<lck->num_share_modes; i++) {
329 struct share_mode_entry *e = &lck->share_modes[i];
330 if (is_valid_share_mode_entry(e)) {
331 if (fsp->posix_open && (e->flags & SHARE_MODE_FLAG_POSIX_OPEN)) {
340 /* Notify any deferred opens waiting on this close. */
341 notify_deferred_opens(lck);
342 reply_to_oplock_break_requests(fsp);
345 * NT can set delete_on_close of the last open
346 * reference to a file.
349 if (!(close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE)
351 || (lck->delete_token == NULL)) {
357 * Ok, we have to delete the file
360 DEBUG(5,("close_remove_share_mode: file %s. Delete on close was set "
361 "- deleting file.\n", fsp_str_dbg(fsp)));
364 * Don't try to update the write time when we delete the file
366 fsp->update_write_time_on_close = false;
368 if (!unix_token_equal(lck->delete_token, ¤t_user.ut)) {
369 /* Become the user who requested the delete. */
371 DEBUG(5,("close_remove_share_mode: file %s. "
372 "Change user to uid %u\n",
374 (unsigned int)lck->delete_token->uid));
376 if (!push_sec_ctx()) {
377 smb_panic("close_remove_share_mode: file %s. failed to push "
381 set_sec_ctx(lck->delete_token->uid,
382 lck->delete_token->gid,
383 lck->delete_token->ngroups,
384 lck->delete_token->groups,
390 /* We can only delete the file if the name we have is still valid and
391 hasn't been renamed. */
393 if (fsp->posix_open) {
394 ret = SMB_VFS_LSTAT(conn, fsp->fsp_name);
396 ret = SMB_VFS_STAT(conn, fsp->fsp_name);
400 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
401 "was set and stat failed with error %s\n",
402 fsp_str_dbg(fsp), strerror(errno)));
404 * Don't save the errno here, we ignore this error
409 id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
411 if (!file_id_equal(&fsp->file_id, &id)) {
412 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
413 "was set and dev and/or inode does not match\n",
415 DEBUG(5,("close_remove_share_mode: file %s. stored file_id %s, "
418 file_id_string_tos(&fsp->file_id),
419 file_id_string_tos(&id)));
421 * Don't save the errno here, we ignore this error
426 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
427 && !is_ntfs_stream_smb_fname(fsp->fsp_name)) {
429 status = delete_all_streams(conn, fsp->fsp_name->base_name);
431 if (!NT_STATUS_IS_OK(status)) {
432 DEBUG(5, ("delete_all_streams failed: %s\n",
439 if (SMB_VFS_UNLINK(conn, fsp->fsp_name) != 0) {
441 * This call can potentially fail as another smbd may
442 * have had the file open with delete on close set and
443 * deleted it when its last reference to this file
444 * went away. Hence we log this but not at debug level
448 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
449 "was set and unlink failed with error %s\n",
450 fsp_str_dbg(fsp), strerror(errno)));
452 status = map_nt_error_from_unix(errno);
455 notify_fname(conn, NOTIFY_ACTION_REMOVED,
456 FILE_NOTIFY_CHANGE_FILE_NAME,
457 fsp->fsp_name->base_name);
459 /* As we now have POSIX opens which can unlink
460 * with other open files we may have taken
461 * this code path with more than one share mode
462 * entry - ensure we only delete once by resetting
463 * the delete on close flag. JRA.
466 set_delete_on_close_lck(lck, False, NULL);
479 void set_close_write_time(struct files_struct *fsp, struct timespec ts)
481 DEBUG(6,("close_write_time: %s" , time_to_asc(convert_timespec_to_time_t(ts))));
483 if (null_timespec(ts)) {
487 * if the write time on close is explict set, then don't
488 * need to fix it up to the value in the locking db
490 fsp->write_time_forced = false;
492 fsp->update_write_time_on_close = true;
493 fsp->close_write_time = ts;
496 static NTSTATUS update_write_time_on_close(struct files_struct *fsp)
498 struct smb_file_time ft;
504 if (!fsp->update_write_time_on_close) {
508 if (null_timespec(fsp->close_write_time)) {
509 fsp->close_write_time = timespec_current();
512 /* Ensure we have a valid stat struct for the source. */
513 if (fsp->fh->fd != -1) {
514 ret = SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st);
516 if (fsp->posix_open) {
517 ret = SMB_VFS_LSTAT(fsp->conn, fsp->fsp_name);
519 ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name);
524 return map_nt_error_from_unix(errno);
527 if (!VALID_STAT(fsp->fsp_name->st)) {
528 /* if it doesn't seem to be a real file */
532 ft.mtime = fsp->close_write_time;
533 status = smb_set_file_time(fsp->conn, fsp, fsp->fsp_name, &ft, true);
534 if (!NT_STATUS_IS_OK(status)) {
541 static NTSTATUS ntstatus_keeperror(NTSTATUS s1, NTSTATUS s2)
543 if (!NT_STATUS_IS_OK(s1)) {
549 /****************************************************************************
552 close_type can be NORMAL_CLOSE=0,SHUTDOWN_CLOSE,ERROR_CLOSE.
553 printing and magic scripts are only run on normal close.
554 delete on close is done on normal and shutdown close.
555 ****************************************************************************/
557 static NTSTATUS close_normal_file(struct smb_request *req, files_struct *fsp,
558 enum file_close_type close_type)
560 NTSTATUS status = NT_STATUS_OK;
562 connection_struct *conn = fsp->conn;
564 if (fsp->aio_write_behind) {
566 * If we're finishing write behind on a close we can get a write
567 * error here, we must remember this.
569 int ret = wait_for_aio_completion(fsp);
571 status = ntstatus_keeperror(
572 status, map_nt_error_from_unix(ret));
575 cancel_aio_by_fsp(fsp);
579 * If we're flushing on a close we can get a write
580 * error here, we must remember this.
583 tmp = close_filestruct(fsp);
584 status = ntstatus_keeperror(status, tmp);
586 if (fsp->print_file) {
587 print_fsp_end(fsp, close_type);
592 /* Remove the oplock before potentially deleting the file. */
593 if(fsp->oplock_type) {
594 release_file_oplock(fsp);
597 /* If this is an old DOS or FCB open and we have multiple opens on
598 the same handle we only have one share mode. Ensure we only remove
599 the share mode on the last close. */
601 if (fsp->fh->ref_count == 1) {
602 /* Should we return on error here... ? */
603 tmp = close_remove_share_mode(fsp, close_type);
604 status = ntstatus_keeperror(status, tmp);
607 locking_close_file(smbd_messaging_context(), fsp);
610 status = ntstatus_keeperror(status, tmp);
612 /* check for magic scripts */
613 if (close_type == NORMAL_CLOSE) {
614 tmp = check_magic(fsp);
615 status = ntstatus_keeperror(status, tmp);
619 * Ensure pending modtime is set after close.
622 tmp = update_write_time_on_close(fsp);
623 if (NT_STATUS_EQUAL(tmp, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
624 /* Someone renamed the file or a parent directory containing
625 * this file. We can't do anything about this, we don't have
626 * an "update timestamp by fd" call in POSIX. Eat the error. */
631 status = ntstatus_keeperror(status, tmp);
633 DEBUG(2,("%s closed file %s (numopen=%d) %s\n",
634 conn->server_info->unix_name, fsp_str_dbg(fsp),
635 conn->num_files_open - 1,
636 nt_errstr(status) ));
642 /****************************************************************************
643 Close a directory opened by an NT SMB call.
644 ****************************************************************************/
646 static NTSTATUS close_directory(struct smb_request *req, files_struct *fsp,
647 enum file_close_type close_type)
649 struct share_mode_lock *lck = NULL;
650 bool delete_dir = False;
651 NTSTATUS status = NT_STATUS_OK;
654 * NT can set delete_on_close of the last open
655 * reference to a directory also.
658 lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL,
662 DEBUG(0, ("close_directory: Could not get share mode lock for "
663 "%s\n", fsp_str_dbg(fsp)));
664 status = NT_STATUS_INVALID_PARAMETER;
668 if (!del_share_mode(lck, fsp)) {
669 DEBUG(0, ("close_directory: Could not delete share entry for "
670 "%s\n", fsp_str_dbg(fsp)));
673 if (fsp->initial_delete_on_close) {
674 bool became_user = False;
676 /* Initial delete on close was set - for
677 * directories we don't care if anyone else
678 * wrote a real delete on close. */
680 if (current_user.vuid != fsp->vuid) {
681 become_user(fsp->conn, fsp->vuid);
684 send_stat_cache_delete_message(fsp->fsp_name->base_name);
685 set_delete_on_close_lck(lck, True, ¤t_user.ut);
691 delete_dir = lck->delete_on_close;
695 /* See if others still have the dir open. If this is the
696 * case, then don't delete. If all opens are POSIX delete now. */
697 for (i=0; i<lck->num_share_modes; i++) {
698 struct share_mode_entry *e = &lck->share_modes[i];
699 if (is_valid_share_mode_entry(e)) {
700 if (fsp->posix_open && (e->flags & SHARE_MODE_FLAG_POSIX_OPEN)) {
709 if ((close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE) &&
713 /* Become the user who requested the delete. */
715 if (!push_sec_ctx()) {
716 smb_panic("close_directory: failed to push sec_ctx.\n");
719 set_sec_ctx(lck->delete_token->uid,
720 lck->delete_token->gid,
721 lck->delete_token->ngroups,
722 lck->delete_token->groups,
727 status = rmdir_internals(talloc_tos(), fsp->conn,
730 DEBUG(5,("close_directory: %s. Delete on close was set - "
731 "deleting directory returned %s.\n",
732 fsp_str_dbg(fsp), nt_errstr(status)));
738 * Ensure we remove any change notify requests that would
739 * now fail as the directory has been deleted.
742 if(NT_STATUS_IS_OK(status)) {
743 remove_pending_change_notify_requests_by_fid(fsp, NT_STATUS_DELETE_PENDING);
747 remove_pending_change_notify_requests_by_fid(
751 status = fd_close(fsp);
753 if (!NT_STATUS_IS_OK(status)) {
754 DEBUG(0, ("Could not close dir! fname=%s, fd=%d, err=%d=%s\n",
755 fsp_str_dbg(fsp), fsp->fh->fd, errno,
760 * Do the code common to files and directories.
762 close_filestruct(fsp);
770 /****************************************************************************
771 Close a files_struct.
772 ****************************************************************************/
774 NTSTATUS close_file(struct smb_request *req, files_struct *fsp,
775 enum file_close_type close_type)
778 struct files_struct *base_fsp = fsp->base_fsp;
780 if(fsp->is_directory) {
781 status = close_directory(req, fsp, close_type);
782 } else if (fsp->fake_file_handle != NULL) {
783 status = close_fake_file(req, fsp);
785 status = close_normal_file(req, fsp, close_type);
788 if ((base_fsp != NULL) && (close_type != SHUTDOWN_CLOSE)) {
791 * fsp was a stream, the base fsp can't be a stream as well
793 * For SHUTDOWN_CLOSE this is not possible here, because
794 * SHUTDOWN_CLOSE only happens from files.c which walks the
795 * complete list of files. If we mess with more than one fsp
796 * those loops will become confused.
799 SMB_ASSERT(base_fsp->base_fsp == NULL);
800 close_file(req, base_fsp, close_type);
806 /****************************************************************************
807 Deal with an (authorized) message to close a file given the share mode
809 ****************************************************************************/
811 void msg_close_file(struct messaging_context *msg_ctx,
814 struct server_id server_id,
817 files_struct *fsp = NULL;
818 struct share_mode_entry e;
820 message_to_share_mode_entry(&e, (char *)data->data);
823 char *sm_str = share_mode_str(NULL, 0, &e);
825 smb_panic("talloc failed");
827 DEBUG(10,("msg_close_file: got request to close share mode "
828 "entry %s\n", sm_str));
832 fsp = file_find_dif(e.id, e.share_file_id);
834 DEBUG(10,("msg_close_file: failed to find file.\n"));
837 close_file(NULL, fsp, NORMAL_CLOSE);