source: vendor/3.6.9/source3/modules/vfs_recycle.c

Last change on this file was 740, checked in by Silvan Scherrer, 13 years ago

Samba Server: update vendor to 3.6.0
File size: 18.4 KB
Line 
1/*
2 * Recycle bin VFS module for Samba.
3 *
4 * Copyright (C) 2001, Brandon Stone, Amherst College, <bbstone@amherst.edu>.
5 * Copyright (C) 2002, Jeremy Allison - modified to make a VFS module.
6 * Copyright (C) 2002, Alexander Bokovoy - cascaded VFS adoption,
7 * Copyright (C) 2002, Juergen Hasch - added some options.
8 * Copyright (C) 2002, Simo Sorce
9 * Copyright (C) 2002, Stefan (metze) Metzmacher
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 3 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, see <http://www.gnu.org/licenses/>.
23 */
24
25#include "includes.h"
26#include "smbd/smbd.h"
27#include "system/filesys.h"
28#include "../librpc/gen_ndr/ndr_netlogon.h"
29#include "auth.h"
30
31#define ALLOC_CHECK(ptr, label) do { if ((ptr) == NULL) { DEBUG(0, ("recycle.bin: out of memory!\n")); errno = ENOMEM; goto label; } } while(0)
32
33static int vfs_recycle_debug_level = DBGC_VFS;
34
35#undef DBGC_CLASS
36#define DBGC_CLASS vfs_recycle_debug_level
37
38static int recycle_connect(vfs_handle_struct *handle, const char *service, const char *user);
39static void recycle_disconnect(vfs_handle_struct *handle);
40static int recycle_unlink(vfs_handle_struct *handle,
41 const struct smb_filename *smb_fname);
42
43static int recycle_connect(vfs_handle_struct *handle, const char *service, const char *user)
44{
45 int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
46
47 if (ret < 0) {
48 return ret;
49 }
50
51 DEBUG(10,("recycle_connect() connect to service[%s] as user[%s].\n",
52 service,user));
53
54 return 0;
55}
56
57static void recycle_disconnect(vfs_handle_struct *handle)
58{
59 DEBUG(10,("recycle_disconnect() connect to service[%s].\n",
60 lp_servicename(SNUM(handle->conn))));
61
62 SMB_VFS_NEXT_DISCONNECT(handle);
63}
64
65static const char *recycle_repository(vfs_handle_struct *handle)
66{
67 const char *tmp_str = NULL;
68
69 tmp_str = lp_parm_const_string(SNUM(handle->conn), "recycle", "repository",".recycle");
70
71 DEBUG(10, ("recycle: repository = %s\n", tmp_str));
72
73 return tmp_str;
74}
75
76static bool recycle_keep_dir_tree(vfs_handle_struct *handle)
77{
78 bool ret;
79
80 ret = lp_parm_bool(SNUM(handle->conn), "recycle", "keeptree", False);
81
82 DEBUG(10, ("recycle_bin: keeptree = %s\n", ret?"True":"False"));
83
84 return ret;
85}
86
87static bool recycle_versions(vfs_handle_struct *handle)
88{
89 bool ret;
90
91 ret = lp_parm_bool(SNUM(handle->conn), "recycle", "versions", False);
92
93 DEBUG(10, ("recycle: versions = %s\n", ret?"True":"False"));
94
95 return ret;
96}
97
98static bool recycle_touch(vfs_handle_struct *handle)
99{
100 bool ret;
101
102 ret = lp_parm_bool(SNUM(handle->conn), "recycle", "touch", False);
103
104 DEBUG(10, ("recycle: touch = %s\n", ret?"True":"False"));
105
106 return ret;
107}
108
109static bool recycle_touch_mtime(vfs_handle_struct *handle)
110{
111 bool ret;
112
113 ret = lp_parm_bool(SNUM(handle->conn), "recycle", "touch_mtime", False);
114
115 DEBUG(10, ("recycle: touch_mtime = %s\n", ret?"True":"False"));
116
117 return ret;
118}
119
120static const char **recycle_exclude(vfs_handle_struct *handle)
121{
122 const char **tmp_lp;
123
124 tmp_lp = lp_parm_string_list(SNUM(handle->conn), "recycle", "exclude", NULL);
125
126 DEBUG(10, ("recycle: exclude = %s ...\n", tmp_lp?*tmp_lp:""));
127
128 return tmp_lp;
129}
130
131static const char **recycle_exclude_dir(vfs_handle_struct *handle)
132{
133 const char **tmp_lp;
134
135 tmp_lp = lp_parm_string_list(SNUM(handle->conn), "recycle", "exclude_dir", NULL);
136
137 DEBUG(10, ("recycle: exclude_dir = %s ...\n", tmp_lp?*tmp_lp:""));
138
139 return tmp_lp;
140}
141
142static const char **recycle_noversions(vfs_handle_struct *handle)
143{
144 const char **tmp_lp;
145
146 tmp_lp = lp_parm_string_list(SNUM(handle->conn), "recycle", "noversions", NULL);
147
148 DEBUG(10, ("recycle: noversions = %s\n", tmp_lp?*tmp_lp:""));
149
150 return tmp_lp;
151}
152
153static SMB_OFF_T recycle_maxsize(vfs_handle_struct *handle)
154{
155 SMB_OFF_T maxsize;
156
157 maxsize = conv_str_size(lp_parm_const_string(SNUM(handle->conn),
158 "recycle", "maxsize", NULL));
159
160 DEBUG(10, ("recycle: maxsize = %lu\n", (long unsigned int)maxsize));
161
162 return maxsize;
163}
164
165static SMB_OFF_T recycle_minsize(vfs_handle_struct *handle)
166{
167 SMB_OFF_T minsize;
168
169 minsize = conv_str_size(lp_parm_const_string(SNUM(handle->conn),
170 "recycle", "minsize", NULL));
171
172 DEBUG(10, ("recycle: minsize = %lu\n", (long unsigned int)minsize));
173
174 return minsize;
175}
176
177static mode_t recycle_directory_mode(vfs_handle_struct *handle)
178{
179 int dirmode;
180 const char *buff;
181
182 buff = lp_parm_const_string(SNUM(handle->conn), "recycle", "directory_mode", NULL);
183
184 if (buff != NULL ) {
185 sscanf(buff, "%o", &dirmode);
186 } else {
187 dirmode=S_IRUSR | S_IWUSR | S_IXUSR;
188 }
189
190 DEBUG(10, ("recycle: directory_mode = %o\n", dirmode));
191 return (mode_t)dirmode;
192}
193
194static mode_t recycle_subdir_mode(vfs_handle_struct *handle)
195{
196 int dirmode;
197 const char *buff;
198
199 buff = lp_parm_const_string(SNUM(handle->conn), "recycle", "subdir_mode", NULL);
200
201 if (buff != NULL ) {
202 sscanf(buff, "%o", &dirmode);
203 } else {
204 dirmode=recycle_directory_mode(handle);
205 }
206
207 DEBUG(10, ("recycle: subdir_mode = %o\n", dirmode));
208 return (mode_t)dirmode;
209}
210
211static bool recycle_directory_exist(vfs_handle_struct *handle, const char *dname)
212{
213 SMB_STRUCT_STAT st;
214
215 if (vfs_stat_smb_fname(handle->conn, dname, &st) == 0) {
216 if (S_ISDIR(st.st_ex_mode)) {
217 return True;
218 }
219 }
220
221 return False;
222}
223
224static bool recycle_file_exist(vfs_handle_struct *handle,
225 const struct smb_filename *smb_fname)
226{
227 struct smb_filename *smb_fname_tmp = NULL;
228 NTSTATUS status;
229 bool ret = false;
230
231 status = copy_smb_filename(talloc_tos(), smb_fname, &smb_fname_tmp);
232 if (!NT_STATUS_IS_OK(status)) {
233 return false;
234 }
235
236 if (SMB_VFS_STAT(handle->conn, smb_fname_tmp) == 0) {
237 if (S_ISREG(smb_fname_tmp->st.st_ex_mode)) {
238 ret = true;
239 }
240 }
241
242 TALLOC_FREE(smb_fname_tmp);
243 return ret;
244}
245
246/**
247 * Return file size
248 * @param conn connection
249 * @param fname file name
250 * @return size in bytes
251 **/
252static SMB_OFF_T recycle_get_file_size(vfs_handle_struct *handle,
253 const struct smb_filename *smb_fname)
254{
255 struct smb_filename *smb_fname_tmp = NULL;
256 NTSTATUS status;
257 SMB_OFF_T size;
258
259 status = copy_smb_filename(talloc_tos(), smb_fname, &smb_fname_tmp);
260 if (!NT_STATUS_IS_OK(status)) {
261 size = (SMB_OFF_T)0;
262 goto out;
263 }
264
265 if (SMB_VFS_STAT(handle->conn, smb_fname_tmp) != 0) {
266 DEBUG(0,("recycle: stat for %s returned %s\n",
267 smb_fname_str_dbg(smb_fname_tmp), strerror(errno)));
268 size = (SMB_OFF_T)0;
269 goto out;
270 }
271
272 size = smb_fname_tmp->st.st_ex_size;
273 out:
274 TALLOC_FREE(smb_fname_tmp);
275 return size;
276}
277
278/**
279 * Create directory tree
280 * @param conn connection
281 * @param dname Directory tree to be created
282 * @return Returns True for success
283 **/
284static bool recycle_create_dir(vfs_handle_struct *handle, const char *dname)
285{
286 size_t len;
287 mode_t mode;
288 char *new_dir = NULL;
289 char *tmp_str = NULL;
290 char *token;
291 char *tok_str;
292 bool ret = False;
293 char *saveptr;
294
295 mode = recycle_directory_mode(handle);
296
297 tmp_str = SMB_STRDUP(dname);
298 ALLOC_CHECK(tmp_str, done);
299 tok_str = tmp_str;
300
301 len = strlen(dname)+1;
302 new_dir = (char *)SMB_MALLOC(len + 1);
303 ALLOC_CHECK(new_dir, done);
304 *new_dir = '\0';
305 if (dname[0] == '/') {
306 /* Absolute path. */
307 safe_strcat(new_dir,"/",len);
308 }
309
310 /* Create directory tree if neccessary */
311 for(token = strtok_r(tok_str, "/", &saveptr); token;
312 token = strtok_r(NULL, "/", &saveptr)) {
313 safe_strcat(new_dir, token, len);
314 if (recycle_directory_exist(handle, new_dir))
315 DEBUG(10, ("recycle: dir %s already exists\n", new_dir));
316 else {
317 DEBUG(5, ("recycle: creating new dir %s\n", new_dir));
318 if (SMB_VFS_NEXT_MKDIR(handle, new_dir, mode) != 0) {
319 DEBUG(1,("recycle: mkdir failed for %s with error: %s\n", new_dir, strerror(errno)));
320 ret = False;
321 goto done;
322 }
323 }
324 safe_strcat(new_dir, "/", len);
325 mode = recycle_subdir_mode(handle);
326 }
327
328 ret = True;
329done:
330 SAFE_FREE(tmp_str);
331 SAFE_FREE(new_dir);
332 return ret;
333}
334
335/**
336 * Check if any of the components of "exclude_list" are contained in path.
337 * Return True if found
338 **/
339
340static bool matchdirparam(const char **dir_exclude_list, char *path)
341{
342 char *startp = NULL, *endp = NULL;
343
344 if (dir_exclude_list == NULL || dir_exclude_list[0] == NULL ||
345 *dir_exclude_list[0] == '\0' || path == NULL || *path == '\0') {
346 return False;
347 }
348
349 /*
350 * Walk the components of path, looking for matches with the
351 * exclude list on each component.
352 */
353
354 for (startp = path; startp; startp = endp) {
355 int i;
356
357 while (*startp == '/') {
358 startp++;
359 }
360 endp = strchr(startp, '/');
361 if (endp) {
362 *endp = '\0';
363 }
364
365 for(i=0; dir_exclude_list[i] ; i++) {
366 if(unix_wild_match(dir_exclude_list[i], startp)) {
367 /* Repair path. */
368 if (endp) {
369 *endp = '/';
370 }
371 return True;
372 }
373 }
374
375 /* Repair path. */
376 if (endp) {
377 *endp = '/';
378 }
379 }
380
381 return False;
382}
383
384/**
385 * Check if needle is contained in haystack, * and ? patterns are resolved
386 * @param haystack list of parameters separated by delimimiter character
387 * @param needle string to be matched exectly to haystack including pattern matching
388 * @return True if found
389 **/
390static bool matchparam(const char **haystack_list, const char *needle)
391{
392 int i;
393
394 if (haystack_list == NULL || haystack_list[0] == NULL ||
395 *haystack_list[0] == '\0' || needle == NULL || *needle == '\0') {
396 return False;
397 }
398
399 for(i=0; haystack_list[i] ; i++) {
400 if(unix_wild_match(haystack_list[i], needle)) {
401 return True;
402 }
403 }
404
405 return False;
406}
407
408/**
409 * Touch access or modify date
410 **/
411static void recycle_do_touch(vfs_handle_struct *handle,
412 const struct smb_filename *smb_fname,
413 bool touch_mtime)
414{
415 struct smb_filename *smb_fname_tmp = NULL;
416 struct smb_file_time ft;
417 NTSTATUS status;
418 int ret, err;
419
420 ZERO_STRUCT(ft);
421
422 status = copy_smb_filename(talloc_tos(), smb_fname, &smb_fname_tmp);
423 if (!NT_STATUS_IS_OK(status)) {
424 return;
425 }
426
427 if (SMB_VFS_STAT(handle->conn, smb_fname_tmp) != 0) {
428 DEBUG(0,("recycle: stat for %s returned %s\n",
429 smb_fname_str_dbg(smb_fname_tmp), strerror(errno)));
430 goto out;
431 }
432 /* atime */
433 ft.atime = timespec_current();
434 /* mtime */
435 ft.mtime = touch_mtime ? ft.atime : smb_fname_tmp->st.st_ex_mtime;
436
437 become_root();
438 ret = SMB_VFS_NEXT_NTIMES(handle, smb_fname_tmp, &ft);
439 err = errno;
440 unbecome_root();
441 if (ret == -1 ) {
442 DEBUG(0, ("recycle: touching %s failed, reason = %s\n",
443 smb_fname_str_dbg(smb_fname_tmp), strerror(err)));
444 }
445 out:
446 TALLOC_FREE(smb_fname_tmp);
447}
448
449/**
450 * Check if file should be recycled
451 **/
452static int recycle_unlink(vfs_handle_struct *handle,
453 const struct smb_filename *smb_fname)
454{
455 connection_struct *conn = handle->conn;
456 char *path_name = NULL;
457 char *temp_name = NULL;
458 char *final_name = NULL;
459 struct smb_filename *smb_fname_final = NULL;
460 const char *base;
461 char *repository = NULL;
462 int i = 1;
463 SMB_OFF_T maxsize, minsize;
464 SMB_OFF_T file_size; /* space_avail; */
465 bool exist;
466 NTSTATUS status;
467 int rc = -1;
468
469 repository = talloc_sub_advanced(NULL, lp_servicename(SNUM(conn)),
470 conn->session_info->unix_name,
471 conn->connectpath,
472 conn->session_info->utok.gid,
473 conn->session_info->sanitized_username,
474 conn->session_info->info3->base.domain.string,
475 recycle_repository(handle));
476 ALLOC_CHECK(repository, done);
477 /* shouldn't we allow absolute path names here? --metze */
478 /* Yes :-). JRA. */
479 trim_char(repository, '\0', '/');
480
481 if(!repository || *(repository) == '\0') {
482 DEBUG(3, ("recycle: repository path not set, purging %s...\n",
483 smb_fname_str_dbg(smb_fname)));
484 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
485 goto done;
486 }
487
488 /* we don't recycle the recycle bin... */
489 if (strncmp(smb_fname->base_name, repository,
490 strlen(repository)) == 0) {
491 DEBUG(3, ("recycle: File is within recycling bin, unlinking ...\n"));
492 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
493 goto done;
494 }
495
496 file_size = recycle_get_file_size(handle, smb_fname);
497 /* it is wrong to purge filenames only because they are empty imho
498 * --- simo
499 *
500 if(fsize == 0) {
501 DEBUG(3, ("recycle: File %s is empty, purging...\n", file_name));
502 rc = SMB_VFS_NEXT_UNLINK(handle,file_name);
503 goto done;
504 }
505 */
506
507 /* FIXME: this is wrong, we should check the whole size of the recycle bin is
508 * not greater then maxsize, not the size of the single file, also it is better
509 * to remove older files
510 */
511 maxsize = recycle_maxsize(handle);
512 if(maxsize > 0 && file_size > maxsize) {
513 DEBUG(3, ("recycle: File %s exceeds maximum recycle size, "
514 "purging... \n", smb_fname_str_dbg(smb_fname)));
515 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
516 goto done;
517 }
518 minsize = recycle_minsize(handle);
519 if(minsize > 0 && file_size < minsize) {
520 DEBUG(3, ("recycle: File %s lowers minimum recycle size, "
521 "purging... \n", smb_fname_str_dbg(smb_fname)));
522 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
523 goto done;
524 }
525
526 /* FIXME: this is wrong: moving files with rename does not change the disk space
527 * allocation
528 *
529 space_avail = SMB_VFS_NEXT_DISK_FREE(handle, ".", True, &bsize, &dfree, &dsize) * 1024L;
530 DEBUG(5, ("space_avail = %Lu, file_size = %Lu\n", space_avail, file_size));
531 if(space_avail < file_size) {
532 DEBUG(3, ("recycle: Not enough diskspace, purging file %s\n", file_name));
533 rc = SMB_VFS_NEXT_UNLINK(handle, file_name);
534 goto done;
535 }
536 */
537
538 /* extract filename and path */
539 base = strrchr(smb_fname->base_name, '/');
540 if (base == NULL) {
541 base = smb_fname->base_name;
542 path_name = SMB_STRDUP("/");
543 ALLOC_CHECK(path_name, done);
544 }
545 else {
546 path_name = SMB_STRDUP(smb_fname->base_name);
547 ALLOC_CHECK(path_name, done);
548 path_name[base - smb_fname->base_name] = '\0';
549 base++;
550 }
551
552 /* original filename with path */
553 DEBUG(10, ("recycle: fname = %s\n", smb_fname_str_dbg(smb_fname)));
554 /* original path */
555 DEBUG(10, ("recycle: fpath = %s\n", path_name));
556 /* filename without path */
557 DEBUG(10, ("recycle: base = %s\n", base));
558
559 if (matchparam(recycle_exclude(handle), base)) {
560 DEBUG(3, ("recycle: file %s is excluded \n", base));
561 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
562 goto done;
563 }
564
565 if (matchdirparam(recycle_exclude_dir(handle), path_name)) {
566 DEBUG(3, ("recycle: directory %s is excluded \n", path_name));
567 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
568 goto done;
569 }
570
571 if (recycle_keep_dir_tree(handle) == True) {
572 if (asprintf(&temp_name, "%s/%s", repository, path_name) == -1) {
573 ALLOC_CHECK(temp_name, done);
574 }
575 } else {
576 temp_name = SMB_STRDUP(repository);
577 }
578 ALLOC_CHECK(temp_name, done);
579
580 exist = recycle_directory_exist(handle, temp_name);
581 if (exist) {
582 DEBUG(10, ("recycle: Directory already exists\n"));
583 } else {
584 DEBUG(10, ("recycle: Creating directory %s\n", temp_name));
585 if (recycle_create_dir(handle, temp_name) == False) {
586 DEBUG(3, ("recycle: Could not create directory, "
587 "purging %s...\n",
588 smb_fname_str_dbg(smb_fname)));
589 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
590 goto done;
591 }
592 }
593
594 if (asprintf(&final_name, "%s/%s", temp_name, base) == -1) {
595 ALLOC_CHECK(final_name, done);
596 }
597
598 /* Create smb_fname with final base name and orig stream name. */
599 status = create_synthetic_smb_fname(talloc_tos(), final_name,
600 smb_fname->stream_name, NULL,
601 &smb_fname_final);
602 if (!NT_STATUS_IS_OK(status)) {
603 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
604 goto done;
605 }
606
607 /* new filename with path */
608 DEBUG(10, ("recycle: recycled file name: %s\n",
609 smb_fname_str_dbg(smb_fname_final)));
610
611 /* check if we should delete file from recycle bin */
612 if (recycle_file_exist(handle, smb_fname_final)) {
613 if (recycle_versions(handle) == False || matchparam(recycle_noversions(handle), base) == True) {
614 DEBUG(3, ("recycle: Removing old file %s from recycle "
615 "bin\n", smb_fname_str_dbg(smb_fname_final)));
616 if (SMB_VFS_NEXT_UNLINK(handle,
617 smb_fname_final) != 0) {
618 DEBUG(1, ("recycle: Error deleting old file: %s\n", strerror(errno)));
619 }
620 }
621 }
622
623 /* rename file we move to recycle bin */
624 i = 1;
625 while (recycle_file_exist(handle, smb_fname_final)) {
626 SAFE_FREE(final_name);
627 if (asprintf(&final_name, "%s/Copy #%d of %s", temp_name, i++, base) == -1) {
628 ALLOC_CHECK(final_name, done);
629 }
630 TALLOC_FREE(smb_fname_final->base_name);
631 smb_fname_final->base_name = talloc_strdup(smb_fname_final,
632 final_name);
633 if (smb_fname_final->base_name == NULL) {
634 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
635 goto done;
636 }
637 }
638
639 DEBUG(10, ("recycle: Moving %s to %s\n", smb_fname_str_dbg(smb_fname),
640 smb_fname_str_dbg(smb_fname_final)));
641 rc = SMB_VFS_NEXT_RENAME(handle, smb_fname, smb_fname_final);
642 if (rc != 0) {
643 DEBUG(3, ("recycle: Move error %d (%s), purging file %s "
644 "(%s)\n", errno, strerror(errno),
645 smb_fname_str_dbg(smb_fname),
646 smb_fname_str_dbg(smb_fname_final)));
647 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
648 goto done;
649 }
650
651 /* touch access date of moved file */
652 if (recycle_touch(handle) == True || recycle_touch_mtime(handle))
653 recycle_do_touch(handle, smb_fname_final,
654 recycle_touch_mtime(handle));
655
656done:
657 SAFE_FREE(path_name);
658 SAFE_FREE(temp_name);
659 SAFE_FREE(final_name);
660 TALLOC_FREE(smb_fname_final);
661 TALLOC_FREE(repository);
662 return rc;
663}
664
665static struct vfs_fn_pointers vfs_recycle_fns = {
666 .connect_fn = recycle_connect,
667 .disconnect = recycle_disconnect,
668 .unlink = recycle_unlink
669};
670
671NTSTATUS vfs_recycle_init(void);
672NTSTATUS vfs_recycle_init(void)
673{
674 NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "recycle",
675 &vfs_recycle_fns);
676
677 if (!NT_STATUS_IS_OK(ret))
678 return ret;
679
680 vfs_recycle_debug_level = debug_add_class("recycle");
681 if (vfs_recycle_debug_level == -1) {
682 vfs_recycle_debug_level = DBGC_VFS;
683 DEBUG(0, ("vfs_recycle: Couldn't register custom debugging class!\n"));
684 } else {
685 DEBUG(10, ("vfs_recycle: Debug class number of 'recycle': %d\n", vfs_recycle_debug_level));
686 }
687
688 return ret;
689}
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