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s3:smbd: use smbXsrv_open_close() instead of smbXsrv_open_update()
[Samba/gebeck_regimport.git] / source3 / smbd / close.c
blob9e7ccc7c05224152c13420145a2afb1f2a0df7c2
1 /*
2 Unix SMB/CIFS implementation.
3 file closing
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 1992-2007.
6 Copyright (C) Volker Lendecke 2005
7
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.
12
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.
17
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/>.
20 */
21
22 #include "includes.h"
23 #include "system/filesys.h"
24 #include "printing.h"
25 #include "smbd/smbd.h"
26 #include "smbd/globals.h"
27 #include "fake_file.h"
28 #include "transfer_file.h"
29 #include "auth.h"
30 #include "messages.h"
31 #include "../librpc/gen_ndr/open_files.h"
32
33 /****************************************************************************
34 Run a file if it is a magic script.
35 ****************************************************************************/
36
37 static NTSTATUS check_magic(struct files_struct *fsp)
38 {
39 int ret;
40 const char *magic_output = NULL;
41 SMB_STRUCT_STAT st;
42 int tmp_fd, outfd;
43 TALLOC_CTX *ctx = NULL;
44 const char *p;
45 struct connection_struct *conn = fsp->conn;
46 char *fname = NULL;
47 NTSTATUS status;
48
49 if (!*lp_magicscript(talloc_tos(), SNUM(conn))) {
50 return NT_STATUS_OK;
51 }
52
53 DEBUG(5,("checking magic for %s\n", fsp_str_dbg(fsp)));
54
55 ctx = talloc_stackframe();
56
57 fname = fsp->fsp_name->base_name;
58
59 if (!(p = strrchr_m(fname,'/'))) {
60 p = fname;
61 } else {
62 p++;
63 }
64
65 if (!strequal(lp_magicscript(talloc_tos(), SNUM(conn)),p)) {
66 status = NT_STATUS_OK;
67 goto out;
68 }
69
70 if (*lp_magicoutput(talloc_tos(), SNUM(conn))) {
71 magic_output = lp_magicoutput(talloc_tos(), SNUM(conn));
72 } else {
73 magic_output = talloc_asprintf(ctx,
74 "%s.out",
75 fname);
76 }
77 if (!magic_output) {
78 status = NT_STATUS_NO_MEMORY;
79 goto out;
80 }
81
82 /* Ensure we don't depend on user's PATH. */
83 p = talloc_asprintf(ctx, "./%s", fname);
84 if (!p) {
85 status = NT_STATUS_NO_MEMORY;
86 goto out;
87 }
88
89 if (chmod(fname, 0755) == -1) {
90 status = map_nt_error_from_unix(errno);
91 goto out;
92 }
93 ret = smbrun(p,&tmp_fd);
94 DEBUG(3,("Invoking magic command %s gave %d\n",
95 p,ret));
96
97 unlink(fname);
98 if (ret != 0 || tmp_fd == -1) {
99 if (tmp_fd != -1) {
100 close(tmp_fd);
101 }
102 status = NT_STATUS_UNSUCCESSFUL;
103 goto out;
104 }
105 outfd = open(magic_output, O_CREAT|O_EXCL|O_RDWR, 0600);
106 if (outfd == -1) {
107 int err = errno;
108 close(tmp_fd);
109 status = map_nt_error_from_unix(err);
110 goto out;
111 }
112
113 if (sys_fstat(tmp_fd, &st, false) == -1) {
114 int err = errno;
115 close(tmp_fd);
116 close(outfd);
117 status = map_nt_error_from_unix(err);
118 goto out;
119 }
120
121 if (transfer_file(tmp_fd,outfd,(off_t)st.st_ex_size) == (off_t)-1) {
122 int err = errno;
123 close(tmp_fd);
124 close(outfd);
125 status = map_nt_error_from_unix(err);
126 goto out;
127 }
128 close(tmp_fd);
129 if (close(outfd) == -1) {
130 status = map_nt_error_from_unix(errno);
131 goto out;
132 }
133
134 status = NT_STATUS_OK;
135
136 out:
137 TALLOC_FREE(ctx);
138 return status;
139 }
140
141 /****************************************************************************
142 Common code to close a file or a directory.
143 ****************************************************************************/
144
145 static NTSTATUS close_filestruct(files_struct *fsp)
146 {
147 NTSTATUS status = NT_STATUS_OK;
148
149 if (fsp->fh->fd != -1) {
150 if(flush_write_cache(fsp, CLOSE_FLUSH) == -1) {
151 status = map_nt_error_from_unix(errno);
152 }
153 delete_write_cache(fsp);
154 }
155
156 return status;
157 }
158
159 static int compare_share_mode_times(const void *p1, const void *p2)
160 {
161 const struct share_mode_entry *s1 = (const struct share_mode_entry *)p1;
162 const struct share_mode_entry *s2 = (const struct share_mode_entry *)p2;
163 return timeval_compare(&s1->time, &s2->time);
164 }
165
166 /****************************************************************************
167 If any deferred opens are waiting on this close, notify them.
168 ****************************************************************************/
169
170 static void notify_deferred_opens(struct smbd_server_connection *sconn,
171 struct share_mode_lock *lck)
172 {
173 struct server_id self = messaging_server_id(sconn->msg_ctx);
174 uint32_t i, num_deferred;
175 struct share_mode_entry *deferred;
176
177 if (!should_notify_deferred_opens(sconn)) {
178 return;
179 }
180
181 num_deferred = 0;
182 for (i=0; i<lck->data->num_share_modes; i++) {
183 struct share_mode_entry *e = &lck->data->share_modes[i];
184
185 if (!is_deferred_open_entry(e)) {
186 continue;
187 }
188 if (share_mode_stale_pid(lck->data, i)) {
189 continue;
190 }
191 num_deferred += 1;
192 }
193 if (num_deferred == 0) {
194 return;
195 }
196
197 deferred = talloc_array(talloc_tos(), struct share_mode_entry,
198 num_deferred);
199 if (deferred == NULL) {
200 return;
201 }
202
203 num_deferred = 0;
204 for (i=0; i<lck->data->num_share_modes; i++) {
205 struct share_mode_entry *e = &lck->data->share_modes[i];
206 if (is_deferred_open_entry(e)) {
207 deferred[num_deferred] = *e;
208 num_deferred += 1;
209 }
210 }
211
212 /*
213 * We need to sort the notifications by initial request time. Imagine
214 * two opens come in asyncronously, both conflicting with the open we
215 * just close here. If we don't sort the notifications, the one that
216 * came in last might get the response before the one that came in
217 * first. This is demonstrated with the smbtorture4 raw.mux test.
218 *
219 * As long as we had the UNUSED_SHARE_MODE_ENTRY, we happened to
220 * survive this particular test. Without UNUSED_SHARE_MODE_ENTRY, we
221 * shuffle the share mode entries around a bit, so that we do not
222 * survive raw.mux anymore.
223 *
224 * We could have kept the ordering in del_share_mode, but as the
225 * ordering was never formalized I think it is better to do it here
226 * where it is necessary.
227 */
228
229 qsort(deferred, num_deferred, sizeof(struct share_mode_entry),
230 compare_share_mode_times);
231
232 for (i=0; i<num_deferred; i++) {
233 struct share_mode_entry *e = &deferred[i];
234
235 if (serverid_equal(&self, &e->pid)) {
236 /*
237 * We need to notify ourself to retry the open. Do
238 * this by finding the queued SMB record, moving it to
239 * the head of the queue and changing the wait time to
240 * zero.
241 */
242 schedule_deferred_open_message_smb(sconn, e->op_mid);
243 } else {
244 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
245
246 share_mode_entry_to_message(msg, e);
247
248 messaging_send_buf(sconn->msg_ctx, e->pid,
249 MSG_SMB_OPEN_RETRY,
250 (uint8 *)msg,
251 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
252 }
253 }
254 TALLOC_FREE(deferred);
255 }
256
257 /****************************************************************************
258 Delete all streams
259 ****************************************************************************/
260
261 NTSTATUS delete_all_streams(connection_struct *conn, const char *fname)
262 {
263 struct stream_struct *stream_info = NULL;
264 int i;
265 unsigned int num_streams = 0;
266 TALLOC_CTX *frame = talloc_stackframe();
267 NTSTATUS status;
268
269 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
270 &num_streams, &stream_info);
271
272 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)) {
273 DEBUG(10, ("no streams around\n"));
274 TALLOC_FREE(frame);
275 return NT_STATUS_OK;
276 }
277
278 if (!NT_STATUS_IS_OK(status)) {
279 DEBUG(10, ("vfs_streaminfo failed: %s\n",
280 nt_errstr(status)));
281 goto fail;
282 }
283
284 DEBUG(10, ("delete_all_streams found %d streams\n",
285 num_streams));
286
287 if (num_streams == 0) {
288 TALLOC_FREE(frame);
289 return NT_STATUS_OK;
290 }
291
292 for (i=0; i<num_streams; i++) {
293 int res;
294 struct smb_filename *smb_fname_stream = NULL;
295
296 if (strequal(stream_info[i].name, "::$DATA")) {
297 continue;
298 }
299
300 status = create_synthetic_smb_fname(talloc_tos(), fname,
301 stream_info[i].name, NULL,
302 &smb_fname_stream);
303
304 if (!NT_STATUS_IS_OK(status)) {
305 DEBUG(0, ("talloc_aprintf failed\n"));
306 goto fail;
307 }
308
309 res = SMB_VFS_UNLINK(conn, smb_fname_stream);
310
311 if (res == -1) {
312 status = map_nt_error_from_unix(errno);
313 DEBUG(10, ("Could not delete stream %s: %s\n",
314 smb_fname_str_dbg(smb_fname_stream),
315 strerror(errno)));
316 TALLOC_FREE(smb_fname_stream);
317 break;
318 }
319 TALLOC_FREE(smb_fname_stream);
320 }
321
322 fail:
323 TALLOC_FREE(frame);
324 return status;
325 }
326
327 /****************************************************************************
328 Deal with removing a share mode on last close.
329 ****************************************************************************/
330
331 static NTSTATUS close_remove_share_mode(files_struct *fsp,
332 enum file_close_type close_type)
333 {
334 connection_struct *conn = fsp->conn;
335 struct server_id self = messaging_server_id(conn->sconn->msg_ctx);
336 bool delete_file = false;
337 bool changed_user = false;
338 struct share_mode_lock *lck = NULL;
339 NTSTATUS status = NT_STATUS_OK;
340 NTSTATUS tmp_status;
341 struct file_id id;
342 const struct security_unix_token *del_token = NULL;
343 const struct security_token *del_nt_token = NULL;
344 bool got_tokens = false;
345 bool normal_close;
346
347 /* Ensure any pending write time updates are done. */
348 if (fsp->update_write_time_event) {
349 update_write_time_handler(fsp->conn->sconn->ev_ctx,
350 fsp->update_write_time_event,
351 timeval_current(),
352 (void *)fsp);
353 }
354
355 /*
356 * Lock the share entries, and determine if we should delete
357 * on close. If so delete whilst the lock is still in effect.
358 * This prevents race conditions with the file being created. JRA.
359 */
360
361 lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
362 if (lck == NULL) {
363 DEBUG(0, ("close_remove_share_mode: Could not get share mode "
364 "lock for file %s\n", fsp_str_dbg(fsp)));
365 return NT_STATUS_INVALID_PARAMETER;
366 }
367
368 if (fsp->write_time_forced) {
369 DEBUG(10,("close_remove_share_mode: write time forced "
370 "for file %s\n",
371 fsp_str_dbg(fsp)));
372 set_close_write_time(fsp, lck->data->changed_write_time);
373 } else if (fsp->update_write_time_on_close) {
374 /* Someone had a pending write. */
375 if (null_timespec(fsp->close_write_time)) {
376 DEBUG(10,("close_remove_share_mode: update to current time "
377 "for file %s\n",
378 fsp_str_dbg(fsp)));
379 /* Update to current time due to "normal" write. */
380 set_close_write_time(fsp, timespec_current());
381 } else {
382 DEBUG(10,("close_remove_share_mode: write time pending "
383 "for file %s\n",
384 fsp_str_dbg(fsp)));
385 /* Update to time set on close call. */
386 set_close_write_time(fsp, fsp->close_write_time);
387 }
388 }
389
390 if (fsp->initial_delete_on_close &&
391 !is_delete_on_close_set(lck, fsp->name_hash)) {
392 bool became_user = False;
393
394 /* Initial delete on close was set and no one else
395 * wrote a real delete on close. */
396
397 if (get_current_vuid(conn) != fsp->vuid) {
398 become_user(conn, fsp->vuid);
399 became_user = True;
400 }
401 fsp->delete_on_close = true;
402 set_delete_on_close_lck(fsp, lck, True,
403 get_current_nttok(conn),
404 get_current_utok(conn));
405 if (became_user) {
406 unbecome_user();
407 }
408 }
409
410 delete_file = is_delete_on_close_set(lck, fsp->name_hash);
411
412 if (delete_file) {
413 int i;
414 /* See if others still have the file open via this pathname.
415 If this is the case, then don't delete. If all opens are
416 POSIX delete now. */
417 for (i=0; i<lck->data->num_share_modes; i++) {
418 struct share_mode_entry *e = &lck->data->share_modes[i];
419
420 if (!is_valid_share_mode_entry(e)) {
421 continue;
422 }
423 if (e->name_hash != fsp->name_hash) {
424 continue;
425 }
426 if (fsp->posix_open
427 && (e->flags & SHARE_MODE_FLAG_POSIX_OPEN)) {
428 continue;
429 }
430 if (serverid_equal(&self, &e->pid) &&
431 (e->share_file_id == fsp->fh->gen_id)) {
432 continue;
433 }
434 if (share_mode_stale_pid(lck->data, i)) {
435 continue;
436 }
437 delete_file = False;
438 break;
439 }
440 }
441
442 /* Notify any deferred opens waiting on this close. */
443 notify_deferred_opens(conn->sconn, lck);
444 reply_to_oplock_break_requests(fsp);
445
446 /*
447 * NT can set delete_on_close of the last open
448 * reference to a file.
449 */
450
451 normal_close = (close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE);
452
453 if (!normal_close || !delete_file) {
454
455 if (!del_share_mode(lck, fsp)) {
456 DEBUG(0, ("close_remove_share_mode: Could not delete "
457 "share entry for file %s\n",
458 fsp_str_dbg(fsp)));
459 }
460
461 TALLOC_FREE(lck);
462 return NT_STATUS_OK;
463 }
464
465 /*
466 * Ok, we have to delete the file
467 */
468
469 DEBUG(5,("close_remove_share_mode: file %s. Delete on close was set "
470 "- deleting file.\n", fsp_str_dbg(fsp)));
471
472 /*
473 * Don't try to update the write time when we delete the file
474 */
475 fsp->update_write_time_on_close = false;
476
477 got_tokens = get_delete_on_close_token(lck, fsp->name_hash,
478 &del_nt_token, &del_token);
479 SMB_ASSERT(got_tokens);
480
481 if (!unix_token_equal(del_token, get_current_utok(conn))) {
482 /* Become the user who requested the delete. */
483
484 DEBUG(5,("close_remove_share_mode: file %s. "
485 "Change user to uid %u\n",
486 fsp_str_dbg(fsp),
487 (unsigned int)del_token->uid));
488
489 if (!push_sec_ctx()) {
490 smb_panic("close_remove_share_mode: file %s. failed to push "
491 "sec_ctx.\n");
492 }
493
494 set_sec_ctx(del_token->uid,
495 del_token->gid,
496 del_token->ngroups,
497 del_token->groups,
498 del_nt_token);
499
500 changed_user = true;
501 }
502
503 /* We can only delete the file if the name we have is still valid and
504 hasn't been renamed. */
505
506 tmp_status = vfs_stat_fsp(fsp);
507 if (!NT_STATUS_IS_OK(tmp_status)) {
508 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
509 "was set and stat failed with error %s\n",
510 fsp_str_dbg(fsp), nt_errstr(tmp_status)));
511 /*
512 * Don't save the errno here, we ignore this error
513 */
514 goto done;
515 }
516
517 id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
518
519 if (!file_id_equal(&fsp->file_id, &id)) {
520 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
521 "was set and dev and/or inode does not match\n",
522 fsp_str_dbg(fsp)));
523 DEBUG(5,("close_remove_share_mode: file %s. stored file_id %s, "
524 "stat file_id %s\n",
525 fsp_str_dbg(fsp),
526 file_id_string_tos(&fsp->file_id),
527 file_id_string_tos(&id)));
528 /*
529 * Don't save the errno here, we ignore this error
530 */
531 goto done;
532 }
533
534 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
535 && !is_ntfs_stream_smb_fname(fsp->fsp_name)) {
536
537 status = delete_all_streams(conn, fsp->fsp_name->base_name);
538
539 if (!NT_STATUS_IS_OK(status)) {
540 DEBUG(5, ("delete_all_streams failed: %s\n",
541 nt_errstr(status)));
542 goto done;
543 }
544 }
545
546
547 if (SMB_VFS_UNLINK(conn, fsp->fsp_name) != 0) {
548 /*
549 * This call can potentially fail as another smbd may
550 * have had the file open with delete on close set and
551 * deleted it when its last reference to this file
552 * went away. Hence we log this but not at debug level
553 * zero.
554 */
555
556 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
557 "was set and unlink failed with error %s\n",
558 fsp_str_dbg(fsp), strerror(errno)));
559
560 status = map_nt_error_from_unix(errno);
561 }
562
563 /* As we now have POSIX opens which can unlink
564 * with other open files we may have taken
565 * this code path with more than one share mode
566 * entry - ensure we only delete once by resetting
567 * the delete on close flag. JRA.
568 */
569
570 fsp->delete_on_close = false;
571 set_delete_on_close_lck(fsp, lck, false, NULL, NULL);
572
573 done:
574
575 if (changed_user) {
576 /* unbecome user. */
577 pop_sec_ctx();
578 }
579
580 if (!del_share_mode(lck, fsp)) {
581 DEBUG(0, ("close_remove_share_mode: Could not delete share "
582 "entry for file %s\n", fsp_str_dbg(fsp)));
583 }
584
585 TALLOC_FREE(lck);
586
587 if (delete_file) {
588 /*
589 * Do the notification after we released the share
590 * mode lock. Inside notify_fname we take out another
591 * tdb lock. With ctdb also accessing our databases,
592 * this can lead to deadlocks. Putting this notify
593 * after the TALLOC_FREE(lck) above we avoid locking
594 * two records simultaneously. Notifies are async and
595 * informational only, so calling the notify_fname
596 * without holding the share mode lock should not do
597 * any harm.
598 */
599 notify_fname(conn, NOTIFY_ACTION_REMOVED,
600 FILE_NOTIFY_CHANGE_FILE_NAME,
601 fsp->fsp_name->base_name);
602 }
603
604 return status;
605 }
606
607 void set_close_write_time(struct files_struct *fsp, struct timespec ts)
608 {
609 DEBUG(6,("close_write_time: %s" , time_to_asc(convert_timespec_to_time_t(ts))));
610
611 if (null_timespec(ts)) {
612 return;
613 }
614 fsp->write_time_forced = false;
615 fsp->update_write_time_on_close = true;
616 fsp->close_write_time = ts;
617 }
618
619 static NTSTATUS update_write_time_on_close(struct files_struct *fsp)
620 {
621 struct smb_file_time ft;
622 NTSTATUS status;
623 struct share_mode_lock *lck = NULL;
624
625 ZERO_STRUCT(ft);
626
627 if (!fsp->update_write_time_on_close) {
628 return NT_STATUS_OK;
629 }
630
631 if (null_timespec(fsp->close_write_time)) {
632 fsp->close_write_time = timespec_current();
633 }
634
635 /* Ensure we have a valid stat struct for the source. */
636 status = vfs_stat_fsp(fsp);
637 if (!NT_STATUS_IS_OK(status)) {
638 return status;
639 }
640
641 if (!VALID_STAT(fsp->fsp_name->st)) {
642 /* if it doesn't seem to be a real file */
643 return NT_STATUS_OK;
644 }
645
646 /*
647 * get_existing_share_mode_lock() isn't really the right
648 * call here, as we're being called after
649 * close_remove_share_mode() inside close_normal_file()
650 * so it's quite normal to not have an existing share
651 * mode here. However, get_share_mode_lock() doesn't
652 * work because that will create a new share mode if
653 * one doesn't exist - so stick with this call (just
654 * ignore any error we get if the share mode doesn't
655 * exist.
656 */
657
658 lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
659 if (lck) {
660 /* On close if we're changing the real file time we
661 * must update it in the open file db too. */
662 (void)set_write_time(fsp->file_id, fsp->close_write_time);
663
664 /* Close write times overwrite sticky write times
665 so we must replace any sticky write time here. */
666 if (!null_timespec(lck->data->changed_write_time)) {
667 (void)set_sticky_write_time(fsp->file_id, fsp->close_write_time);
668 }
669 TALLOC_FREE(lck);
670 }
671
672 ft.mtime = fsp->close_write_time;
673 /* As this is a close based update, we are not directly changing the
674 file attributes from a client call, but indirectly from a write. */
675 status = smb_set_file_time(fsp->conn, fsp, fsp->fsp_name, &ft, false);
676 if (!NT_STATUS_IS_OK(status)) {
677 DEBUG(10,("update_write_time_on_close: smb_set_file_time "
678 "on file %s returned %s\n",
679 fsp_str_dbg(fsp),
680 nt_errstr(status)));
681 return status;
682 }
683
684 return status;
685 }
686
687 static NTSTATUS ntstatus_keeperror(NTSTATUS s1, NTSTATUS s2)
688 {
689 if (!NT_STATUS_IS_OK(s1)) {
690 return s1;
691 }
692 return s2;
693 }
694
695 /****************************************************************************
696 Close a file.
697
698 close_type can be NORMAL_CLOSE=0,SHUTDOWN_CLOSE,ERROR_CLOSE.
699 printing and magic scripts are only run on normal close.
700 delete on close is done on normal and shutdown close.
701 ****************************************************************************/
702
703 static NTSTATUS close_normal_file(struct smb_request *req, files_struct *fsp,
704 enum file_close_type close_type)
705 {
706 NTSTATUS status = NT_STATUS_OK;
707 NTSTATUS tmp;
708 connection_struct *conn = fsp->conn;
709 bool is_durable = false;
710
711 if (fsp->num_aio_requests != 0) {
712
713 if (close_type != SHUTDOWN_CLOSE) {
714 /*
715 * reply_close and the smb2 close must have
716 * taken care of this. No other callers of
717 * close_file should ever have created async
718 * I/O.
719 *
720 * We need to panic here because if we close()
721 * the fd while we have outstanding async I/O
722 * requests, in the worst case we could end up
723 * writing to the wrong file.
724 */
725 DEBUG(0, ("fsp->num_aio_requests=%u\n",
726 fsp->num_aio_requests));
727 smb_panic("can not close with outstanding aio "
728 "requests");
729 }
730
731 /*
732 * For shutdown close, just drop the async requests
733 * including a potential close request pending for
734 * this fsp. Drop the close request first, the
735 * destructor for the aio_requests would execute it.
736 */
737 TALLOC_FREE(fsp->deferred_close);
738
739 while (fsp->num_aio_requests != 0) {
740 /*
741 * The destructor of the req will remove
742 * itself from the fsp
743 */
744 TALLOC_FREE(fsp->aio_requests[0]);
745 }
746 }
747
748 /*
749 * If we're flushing on a close we can get a write
750 * error here, we must remember this.
751 */
752
753 tmp = close_filestruct(fsp);
754 status = ntstatus_keeperror(status, tmp);
755
756 if (NT_STATUS_IS_OK(status) && fsp->op != NULL) {
757 is_durable = fsp->op->global->durable;
758 }
759
760 if (close_type != SHUTDOWN_CLOSE) {
761 is_durable = false;
762 }
763
764 if (is_durable) {
765 DATA_BLOB new_cookie = data_blob_null;
766
767 tmp = SMB_VFS_DURABLE_DISCONNECT(fsp,
768 fsp->op->global->backend_cookie,
769 fsp->op,
770 &new_cookie);
771 if (NT_STATUS_IS_OK(tmp)) {
772 struct timeval tv;
773 NTTIME now;
774
775 if (req != NULL) {
776 tv = req->request_time;
777 } else {
778 tv = timeval_current();
779 }
780 now = timeval_to_nttime(&tv);
781
782 data_blob_free(&fsp->op->global->backend_cookie);
783 fsp->op->global->backend_cookie = new_cookie;
784
785 tmp = smbXsrv_open_close(fsp->op, now);
786 }
787 if (!NT_STATUS_IS_OK(tmp)) {
788 is_durable = false;
789 }
790 }
791
792 if (is_durable) {
793 /*
794 * This is the case where we successfully disconnected
795 * a durable handle and closed the underlying file.
796 * In all other cases, we proceed with a genuine close.
797 */
798 file_free(req, fsp);
799 return NT_STATUS_OK;
800 }
801
802 if (fsp->op != NULL) {
803 /*
804 * Make sure the handle is not marked as durable anymore
805 */
806 fsp->op->global->durable = false;
807 }
808
809 if (fsp->print_file) {
810 /* FIXME: return spool errors */
811 print_spool_end(fsp, close_type);
812 file_free(req, fsp);
813 return NT_STATUS_OK;
814 }
815
816 /* Remove the oplock before potentially deleting the file. */
817 if(fsp->oplock_type) {
818 release_file_oplock(fsp);
819 }
820
821 /* If this is an old DOS or FCB open and we have multiple opens on
822 the same handle we only have one share mode. Ensure we only remove
823 the share mode on the last close. */
824
825 if (fsp->fh->ref_count == 1) {
826 /* Should we return on error here... ? */
827 tmp = close_remove_share_mode(fsp, close_type);
828 status = ntstatus_keeperror(status, tmp);
829 }
830
831 locking_close_file(conn->sconn->msg_ctx, fsp, close_type);
832
833 tmp = fd_close(fsp);
834 status = ntstatus_keeperror(status, tmp);
835
836 /* check for magic scripts */
837 if (close_type == NORMAL_CLOSE) {
838 tmp = check_magic(fsp);
839 status = ntstatus_keeperror(status, tmp);
840 }
841
842 /*
843 * Ensure pending modtime is set after close.
844 */
845
846 tmp = update_write_time_on_close(fsp);
847 if (NT_STATUS_EQUAL(tmp, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
848 /* Someone renamed the file or a parent directory containing
849 * this file. We can't do anything about this, we don't have
850 * an "update timestamp by fd" call in POSIX. Eat the error. */
851
852 tmp = NT_STATUS_OK;
853 }
854
855 status = ntstatus_keeperror(status, tmp);
856
857 DEBUG(2,("%s closed file %s (numopen=%d) %s\n",
858 conn->session_info->unix_info->unix_name, fsp_str_dbg(fsp),
859 conn->num_files_open - 1,
860 nt_errstr(status) ));
861
862 file_free(req, fsp);
863 return status;
864 }
865 /****************************************************************************
866 Function used by reply_rmdir to delete an entire directory
867 tree recursively. Return True on ok, False on fail.
868 ****************************************************************************/
869
870 bool recursive_rmdir(TALLOC_CTX *ctx,
871 connection_struct *conn,
872 struct smb_filename *smb_dname)
873 {
874 const char *dname = NULL;
875 char *talloced = NULL;
876 bool ret = True;
877 long offset = 0;
878 SMB_STRUCT_STAT st;
879 struct smb_Dir *dir_hnd;
880
881 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
882
883 dir_hnd = OpenDir(talloc_tos(), conn, smb_dname->base_name, NULL, 0);
884 if(dir_hnd == NULL)
885 return False;
886
887 while((dname = ReadDirName(dir_hnd, &offset, &st, &talloced))) {
888 struct smb_filename *smb_dname_full = NULL;
889 char *fullname = NULL;
890 bool do_break = true;
891 NTSTATUS status;
892
893 if (ISDOT(dname) || ISDOTDOT(dname)) {
894 TALLOC_FREE(talloced);
895 continue;
896 }
897
898 if (!is_visible_file(conn, smb_dname->base_name, dname, &st,
899 false)) {
900 TALLOC_FREE(talloced);
901 continue;
902 }
903
904 /* Construct the full name. */
905 fullname = talloc_asprintf(ctx,
906 "%s/%s",
907 smb_dname->base_name,
908 dname);
909 if (!fullname) {
910 errno = ENOMEM;
911 goto err_break;
912 }
913
914 status = create_synthetic_smb_fname(talloc_tos(), fullname,
915 NULL, NULL,
916 &smb_dname_full);
917 if (!NT_STATUS_IS_OK(status)) {
918 goto err_break;
919 }
920
921 if(SMB_VFS_LSTAT(conn, smb_dname_full) != 0) {
922 goto err_break;
923 }
924
925 if(smb_dname_full->st.st_ex_mode & S_IFDIR) {
926 if(!recursive_rmdir(ctx, conn, smb_dname_full)) {
927 goto err_break;
928 }
929 if(SMB_VFS_RMDIR(conn,
930 smb_dname_full->base_name) != 0) {
931 goto err_break;
932 }
933 } else if(SMB_VFS_UNLINK(conn, smb_dname_full) != 0) {
934 goto err_break;
935 }
936
937 /* Successful iteration. */
938 do_break = false;
939
940 err_break:
941 TALLOC_FREE(smb_dname_full);
942 TALLOC_FREE(fullname);
943 TALLOC_FREE(talloced);
944 if (do_break) {
945 ret = false;
946 break;
947 }
948 }
949 TALLOC_FREE(dir_hnd);
950 return ret;
951 }
952
953 /****************************************************************************
954 The internals of the rmdir code - called elsewhere.
955 ****************************************************************************/
956
957 static NTSTATUS rmdir_internals(TALLOC_CTX *ctx, files_struct *fsp)
958 {
959 connection_struct *conn = fsp->conn;
960 struct smb_filename *smb_dname = fsp->fsp_name;
961 int ret;
962
963 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
964
965 /* Might be a symlink. */
966 if(SMB_VFS_LSTAT(conn, smb_dname) != 0) {
967 return map_nt_error_from_unix(errno);
968 }
969
970 if (S_ISLNK(smb_dname->st.st_ex_mode)) {
971 /* Is what it points to a directory ? */
972 if(SMB_VFS_STAT(conn, smb_dname) != 0) {
973 return map_nt_error_from_unix(errno);
974 }
975 if (!(S_ISDIR(smb_dname->st.st_ex_mode))) {
976 return NT_STATUS_NOT_A_DIRECTORY;
977 }
978 ret = SMB_VFS_UNLINK(conn, smb_dname);
979 } else {
980 ret = SMB_VFS_RMDIR(conn, smb_dname->base_name);
981 }
982 if (ret == 0) {
983 notify_fname(conn, NOTIFY_ACTION_REMOVED,
984 FILE_NOTIFY_CHANGE_DIR_NAME,
985 smb_dname->base_name);
986 return NT_STATUS_OK;
987 }
988
989 if(((errno == ENOTEMPTY)||(errno == EEXIST)) && *lp_veto_files(talloc_tos(), SNUM(conn))) {
990 /*
991 * Check to see if the only thing in this directory are
992 * vetoed files/directories. If so then delete them and
993 * retry. If we fail to delete any of them (and we *don't*
994 * do a recursive delete) then fail the rmdir.
995 */
996 SMB_STRUCT_STAT st;
997 const char *dname = NULL;
998 char *talloced = NULL;
999 long dirpos = 0;
1000 struct smb_Dir *dir_hnd = OpenDir(talloc_tos(), conn,
1001 smb_dname->base_name, NULL,
1002 0);
1003
1004 if(dir_hnd == NULL) {
1005 errno = ENOTEMPTY;
1006 goto err;
1007 }
1008
1009 while ((dname = ReadDirName(dir_hnd, &dirpos, &st,
1010 &talloced)) != NULL) {
1011 if((strcmp(dname, ".") == 0) || (strcmp(dname, "..")==0)) {
1012 TALLOC_FREE(talloced);
1013 continue;
1014 }
1015 if (!is_visible_file(conn, smb_dname->base_name, dname,
1016 &st, false)) {
1017 TALLOC_FREE(talloced);
1018 continue;
1019 }
1020 if(!IS_VETO_PATH(conn, dname)) {
1021 TALLOC_FREE(dir_hnd);
1022 TALLOC_FREE(talloced);
1023 errno = ENOTEMPTY;
1024 goto err;
1025 }
1026 TALLOC_FREE(talloced);
1027 }
1028
1029 /* We only have veto files/directories.
1030 * Are we allowed to delete them ? */
1031
1032 if(!lp_recursive_veto_delete(SNUM(conn))) {
1033 TALLOC_FREE(dir_hnd);
1034 errno = ENOTEMPTY;
1035 goto err;
1036 }
1037
1038 /* Do a recursive delete. */
1039 RewindDir(dir_hnd,&dirpos);
1040 while ((dname = ReadDirName(dir_hnd, &dirpos, &st,
1041 &talloced)) != NULL) {
1042 struct smb_filename *smb_dname_full = NULL;
1043 char *fullname = NULL;
1044 bool do_break = true;
1045 NTSTATUS status;
1046
1047 if (ISDOT(dname) || ISDOTDOT(dname)) {
1048 TALLOC_FREE(talloced);
1049 continue;
1050 }
1051 if (!is_visible_file(conn, smb_dname->base_name, dname,
1052 &st, false)) {
1053 TALLOC_FREE(talloced);
1054 continue;
1055 }
1056
1057 fullname = talloc_asprintf(ctx,
1058 "%s/%s",
1059 smb_dname->base_name,
1060 dname);
1061
1062 if(!fullname) {
1063 errno = ENOMEM;
1064 goto err_break;
1065 }
1066
1067 status = create_synthetic_smb_fname(talloc_tos(),
1068 fullname, NULL,
1069 NULL,
1070 &smb_dname_full);
1071 if (!NT_STATUS_IS_OK(status)) {
1072 errno = map_errno_from_nt_status(status);
1073 goto err_break;
1074 }
1075
1076 if(SMB_VFS_LSTAT(conn, smb_dname_full) != 0) {
1077 goto err_break;
1078 }
1079 if(smb_dname_full->st.st_ex_mode & S_IFDIR) {
1080 if(!recursive_rmdir(ctx, conn,
1081 smb_dname_full)) {
1082 goto err_break;
1083 }
1084 if(SMB_VFS_RMDIR(conn,
1085 smb_dname_full->base_name) != 0) {
1086 goto err_break;
1087 }
1088 } else if(SMB_VFS_UNLINK(conn, smb_dname_full) != 0) {
1089 goto err_break;
1090 }
1091
1092 /* Successful iteration. */
1093 do_break = false;
1094
1095 err_break:
1096 TALLOC_FREE(fullname);
1097 TALLOC_FREE(smb_dname_full);
1098 TALLOC_FREE(talloced);
1099 if (do_break)
1100 break;
1101 }
1102 TALLOC_FREE(dir_hnd);
1103 /* Retry the rmdir */
1104 ret = SMB_VFS_RMDIR(conn, smb_dname->base_name);
1105 }
1106
1107 err:
1108
1109 if (ret != 0) {
1110 DEBUG(3,("rmdir_internals: couldn't remove directory %s : "
1111 "%s\n", smb_fname_str_dbg(smb_dname),
1112 strerror(errno)));
1113 return map_nt_error_from_unix(errno);
1114 }
1115
1116 notify_fname(conn, NOTIFY_ACTION_REMOVED,
1117 FILE_NOTIFY_CHANGE_DIR_NAME,
1118 smb_dname->base_name);
1119
1120 return NT_STATUS_OK;
1121 }
1122
1123 /****************************************************************************
1124 Close a directory opened by an NT SMB call.
1125 ****************************************************************************/
1126
1127 static NTSTATUS close_directory(struct smb_request *req, files_struct *fsp,
1128 enum file_close_type close_type)
1129 {
1130 struct server_id self = messaging_server_id(fsp->conn->sconn->msg_ctx);
1131 struct share_mode_lock *lck = NULL;
1132 bool delete_dir = False;
1133 NTSTATUS status = NT_STATUS_OK;
1134 NTSTATUS status1 = NT_STATUS_OK;
1135 const struct security_token *del_nt_token = NULL;
1136 const struct security_unix_token *del_token = NULL;
1137
1138 /*
1139 * NT can set delete_on_close of the last open
1140 * reference to a directory also.
1141 */
1142
1143 lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
1144 if (lck == NULL) {
1145 DEBUG(0, ("close_directory: Could not get share mode lock for "
1146 "%s\n", fsp_str_dbg(fsp)));
1147 return NT_STATUS_INVALID_PARAMETER;
1148 }
1149
1150 if (fsp->initial_delete_on_close) {
1151 bool became_user = False;
1152
1153 /* Initial delete on close was set - for
1154 * directories we don't care if anyone else
1155 * wrote a real delete on close. */
1156
1157 if (get_current_vuid(fsp->conn) != fsp->vuid) {
1158 become_user(fsp->conn, fsp->vuid);
1159 became_user = True;
1160 }
1161 send_stat_cache_delete_message(fsp->conn->sconn->msg_ctx,
1162 fsp->fsp_name->base_name);
1163 set_delete_on_close_lck(fsp, lck, true,
1164 get_current_nttok(fsp->conn),
1165 get_current_utok(fsp->conn));
1166 fsp->delete_on_close = true;
1167 if (became_user) {
1168 unbecome_user();
1169 }
1170 }
1171
1172 delete_dir = get_delete_on_close_token(lck, fsp->name_hash,
1173 &del_nt_token, &del_token);
1174
1175 if (delete_dir) {
1176 int i;
1177 /* See if others still have the dir open. If this is the
1178 * case, then don't delete. If all opens are POSIX delete now. */
1179 for (i=0; i<lck->data->num_share_modes; i++) {
1180 struct share_mode_entry *e = &lck->data->share_modes[i];
1181 if (is_valid_share_mode_entry(e) &&
1182 e->name_hash == fsp->name_hash) {
1183 if (fsp->posix_open && (e->flags & SHARE_MODE_FLAG_POSIX_OPEN)) {
1184 continue;
1185 }
1186 if (serverid_equal(&self, &e->pid) &&
1187 (e->share_file_id == fsp->fh->gen_id)) {
1188 continue;
1189 }
1190 if (share_mode_stale_pid(lck->data, i)) {
1191 continue;
1192 }
1193 delete_dir = False;
1194 break;
1195 }
1196 }
1197 }
1198
1199 if ((close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE) &&
1200 delete_dir) {
1201
1202 /* Become the user who requested the delete. */
1203
1204 if (!push_sec_ctx()) {
1205 smb_panic("close_directory: failed to push sec_ctx.\n");
1206 }
1207
1208 set_sec_ctx(del_token->uid,
1209 del_token->gid,
1210 del_token->ngroups,
1211 del_token->groups,
1212 del_nt_token);
1213
1214 if (!del_share_mode(lck, fsp)) {
1215 DEBUG(0, ("close_directory: Could not delete share entry for "
1216 "%s\n", fsp_str_dbg(fsp)));
1217 }
1218
1219 TALLOC_FREE(lck);
1220
1221 if ((fsp->conn->fs_capabilities & FILE_NAMED_STREAMS)
1222 && !is_ntfs_stream_smb_fname(fsp->fsp_name)) {
1223
1224 status = delete_all_streams(fsp->conn, fsp->fsp_name->base_name);
1225 if (!NT_STATUS_IS_OK(status)) {
1226 DEBUG(5, ("delete_all_streams failed: %s\n",
1227 nt_errstr(status)));
1228 return status;
1229 }
1230 }
1231
1232 status = rmdir_internals(talloc_tos(), fsp);
1233
1234 DEBUG(5,("close_directory: %s. Delete on close was set - "
1235 "deleting directory returned %s.\n",
1236 fsp_str_dbg(fsp), nt_errstr(status)));
1237
1238 /* unbecome user. */
1239 pop_sec_ctx();
1240
1241 /*
1242 * Ensure we remove any change notify requests that would
1243 * now fail as the directory has been deleted.
1244 */
1245
1246 if(NT_STATUS_IS_OK(status)) {
1247 remove_pending_change_notify_requests_by_fid(fsp, NT_STATUS_DELETE_PENDING);
1248 }
1249 } else {
1250 if (!del_share_mode(lck, fsp)) {
1251 DEBUG(0, ("close_directory: Could not delete share entry for "
1252 "%s\n", fsp_str_dbg(fsp)));
1253 }
1254
1255 TALLOC_FREE(lck);
1256 remove_pending_change_notify_requests_by_fid(
1257 fsp, NT_STATUS_OK);
1258 }
1259
1260 status1 = fd_close(fsp);
1261
1262 if (!NT_STATUS_IS_OK(status1)) {
1263 DEBUG(0, ("Could not close dir! fname=%s, fd=%d, err=%d=%s\n",
1264 fsp_str_dbg(fsp), fsp->fh->fd, errno,
1265 strerror(errno)));
1266 }
1267
1268 /*
1269 * Do the code common to files and directories.
1270 */
1271 close_filestruct(fsp);
1272 file_free(req, fsp);
1273
1274 if (NT_STATUS_IS_OK(status) && !NT_STATUS_IS_OK(status1)) {
1275 status = status1;
1276 }
1277 return status;
1278 }
1279
1280 /****************************************************************************
1281 Close a files_struct.
1282 ****************************************************************************/
1283
1284 NTSTATUS close_file(struct smb_request *req, files_struct *fsp,
1285 enum file_close_type close_type)
1286 {
1287 NTSTATUS status;
1288 struct files_struct *base_fsp = fsp->base_fsp;
1289
1290 if(fsp->is_directory) {
1291 status = close_directory(req, fsp, close_type);
1292 } else if (fsp->fake_file_handle != NULL) {
1293 status = close_fake_file(req, fsp);
1294 } else {
1295 status = close_normal_file(req, fsp, close_type);
1296 }
1297
1298 if ((base_fsp != NULL) && (close_type != SHUTDOWN_CLOSE)) {
1299
1300 /*
1301 * fsp was a stream, the base fsp can't be a stream as well
1302 *
1303 * For SHUTDOWN_CLOSE this is not possible here, because
1304 * SHUTDOWN_CLOSE only happens from files.c which walks the
1305 * complete list of files. If we mess with more than one fsp
1306 * those loops will become confused.
1307 */
1308
1309 SMB_ASSERT(base_fsp->base_fsp == NULL);
1310 close_file(req, base_fsp, close_type);
1311 }
1312
1313 return status;
1314 }
1315
1316 /****************************************************************************
1317 Deal with an (authorized) message to close a file given the share mode
1318 entry.
1319 ****************************************************************************/
1320
1321 void msg_close_file(struct messaging_context *msg_ctx,
1322 void *private_data,
1323 uint32_t msg_type,
1324 struct server_id server_id,
1325 DATA_BLOB *data)
1326 {
1327 files_struct *fsp = NULL;
1328 struct share_mode_entry e;
1329 struct smbd_server_connection *sconn =
1330 talloc_get_type_abort(private_data,
1331 struct smbd_server_connection);
1332
1333 message_to_share_mode_entry(&e, (char *)data->data);
1334
1335 if(DEBUGLVL(10)) {
1336 char *sm_str = share_mode_str(NULL, 0, &e);
1337 if (!sm_str) {
1338 smb_panic("talloc failed");
1339 }
1340 DEBUG(10,("msg_close_file: got request to close share mode "
1341 "entry %s\n", sm_str));
1342 TALLOC_FREE(sm_str);
1343 }
1344
1345 fsp = file_find_dif(sconn, e.id, e.share_file_id);
1346 if (!fsp) {
1347 DEBUG(10,("msg_close_file: failed to find file.\n"));
1348 return;
1349 }
1350 close_file(NULL, fsp, NORMAL_CLOSE);
1351 }
reg import