2 * scannedonly VFS module for Samba 3.5
4 * Copyright 2007,2008,2009,2010 (C) Olivier Sessink
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 * scannedonly implements a 'filter' like vfs module that talks over a
23 * unix domain socket or over UDP to a anti-virus engine.
25 * files that are clean have a corresponding .scanned:{filename} file
26 * in the same directory. So why the .scanned: files? They take up
27 * only an inode, because they are 0 bytes. To test if the file is
28 * scanned only a stat() call on the filesystem is needed which is
29 * very quick compared to a database lookup. All modern filesystems
30 * use database technology such as balanced trees for lookups anyway.
31 * The number of inodes in modern filesystems is also not limiting
32 * anymore. The .scanned: files are also easy scriptable. You can
33 * remove them with a simple find command or create them with a
34 * simple touch command. Extended filesystem attributes have similar
35 * properties, but are not supported on all filesystems, so that
36 * would limit the usage of the module (and attributes are not as
39 * files that are not clean are sent to the AV-engine. Only the
40 * filename is sent over the socket. The protocol is very simple:
41 * a newline separated list of filenames inside each datagram.
43 * a file AV-scan may be requested multiple times, the AV-engine
44 * should also check if the file has been scanned already. Requests
45 * can also be dropped by the AV-engine (and we thus don't need the
46 * reliability of TCP).
51 #include "smbd/smbd.h"
52 #include "system/filesys.h"
56 #define SENDBUFFERSIZE 1450
59 #define SUN_LEN(sunp) ((size_t)((struct sockaddr_un *)0)->sun_path \
60 + strlen((sunp)->sun_path))
68 int scanning_message_len
;
69 int recheck_time_open
;
70 int recheck_tries_open
;
71 int recheck_size_open
;
72 int recheck_time_readdir
;
73 int recheck_tries_readdir
;
74 bool show_special_files
;
75 bool rm_hidden_files_on_rmdir
;
76 bool hide_nonscanned_files
;
77 bool allow_nonscanned_files
;
78 const char *socketname
;
80 const char *scanning_message
;
81 const char *p_scanned
; /* prefix for scanned files */
82 const char *p_virus
; /* prefix for virus containing files */
83 const char *p_failed
; /* prefix for failed to scan files */
84 char gsendbuffer
[SENDBUFFERSIZE
+ 1];
87 #define STRUCTSCANO(var) ((struct Tscannedonly *)var)
89 struct scannedonly_DIR
{
94 #define SCANNEDONLY_DEBUG 9
95 /*********************/
96 /* utility functions */
97 /*********************/
99 static char *real_path_from_notify_path(TALLOC_CTX
*ctx
,
100 struct Tscannedonly
*so
,
106 name
= strrchr(path
, '/');
110 pathlen
= name
- path
;
113 if (len
<= so
->scanning_message_len
) {
117 if (strcmp(name
+ (len
- so
->scanning_message_len
),
118 so
->scanning_message
) != 0) {
122 return talloc_strndup(ctx
,path
,
123 pathlen
+ len
- so
->scanning_message_len
);
126 static char *cachefile_name(TALLOC_CTX
*ctx
,
127 const char *shortname
,
129 const char *p_scanned
)
131 return talloc_asprintf(ctx
, "%s%s%s", base
, p_scanned
, shortname
);
134 static char *name_w_ending_slash(TALLOC_CTX
*ctx
, const char *name
)
136 int len
= strlen(name
);
137 if (name
[len
- 1] == '/') {
138 return talloc_strdup(ctx
,name
);
140 return talloc_asprintf(ctx
, "%s/", name
);
144 static char *cachefile_name_f_fullpath(TALLOC_CTX
*ctx
,
145 const char *fullpath
,
146 const char *p_scanned
)
149 char *tmp
, *cachefile
;
150 const char *shortname
;
151 tmp
= strrchr(fullpath
, '/');
153 base
= talloc_strndup(ctx
, fullpath
, (tmp
- fullpath
) + 1);
157 shortname
= (const char *)fullpath
;
159 cachefile
= cachefile_name(ctx
, shortname
, base
, p_scanned
);
160 DEBUG(SCANNEDONLY_DEBUG
,
161 ("cachefile_name_f_fullpath cachefile=%s\n", cachefile
));
165 static char *construct_full_path(TALLOC_CTX
*ctx
, vfs_handle_struct
* handle
,
166 const char *somepath
, bool ending_slash
)
173 if (somepath
[0] == '/') {
175 return name_w_ending_slash(ctx
,somepath
);
177 return talloc_strdup(ctx
,somepath
);
180 if (tmp
[0]=='.'&&tmp
[1]=='/') {
183 /* vfs_GetWd() seems to return a path with a slash */
185 return talloc_asprintf(ctx
, "%s/%s/",
186 vfs_GetWd(ctx
, handle
->conn
),tmp
);
188 return talloc_asprintf(ctx
, "%s/%s",
189 vfs_GetWd(ctx
, handle
->conn
),tmp
);
192 static int connect_to_scanner(vfs_handle_struct
* handle
)
194 struct Tscannedonly
*so
= (struct Tscannedonly
*)handle
->data
;
196 if (so
->domain_socket
) {
197 struct sockaddr_un saun
;
198 DEBUG(SCANNEDONLY_DEBUG
, ("socket=%s\n", so
->socketname
));
199 if ((so
->socket
= socket(AF_UNIX
, SOCK_DGRAM
, 0)) < 0) {
200 DEBUG(2, ("failed to create socket %s\n",
204 saun
.sun_family
= AF_UNIX
;
205 strncpy(saun
.sun_path
, so
->socketname
,
206 sizeof(saun
.sun_path
) - 1);
207 if (connect(so
->socket
, (struct sockaddr
*)(void *)&saun
,
208 SUN_LEN(&saun
)) < 0) {
209 DEBUG(2, ("failed to connect to socket %s\n",
213 DEBUG(SCANNEDONLY_DEBUG
,("bound %s to socket %d\n",
214 saun
.sun_path
, so
->socket
));
217 so
->socket
= open_udp_socket(so
->scanhost
, so
->portnum
);
218 if (so
->socket
< 0) {
219 DEBUG(2,("failed to open UDP socket to %s:%d\n",
220 so
->scanhost
,so
->portnum
));
225 {/* increasing the socket buffer is done because we have large bursts
226 of UDP packets or DGRAM's on a domain socket whenever we hit a
227 large directory with lots of unscanned files. */
229 socklen_t size
= sizeof(int);
230 getsockopt(so
->socket
, SOL_SOCKET
, SO_RCVBUF
,
231 (char *)&sndsize
, &size
);
232 DEBUG(SCANNEDONLY_DEBUG
, ("current socket buffer size=%d\n",
235 if (setsockopt(so
->socket
, SOL_SOCKET
, SO_RCVBUF
,
237 (int)sizeof(sndsize
)) != 0) {
238 DEBUG(SCANNEDONLY_DEBUG
,
239 ("error setting socket buffer %s (%d)\n",
240 strerror(errno
), errno
));
243 set_blocking(so
->socket
, false);
247 static void flush_sendbuffer(vfs_handle_struct
* handle
)
249 struct Tscannedonly
*so
= (struct Tscannedonly
*)handle
->data
;
250 int ret
, len
, loop
= 10;
251 if (so
->gsendbuffer
[0] == '\0') {
257 len
= strlen(so
->gsendbuffer
);
258 ret
= send(so
->socket
, so
->gsendbuffer
, len
, 0);
260 so
->gsendbuffer
[0] = '\0';
264 DEBUG(3,("scannedonly flush_sendbuffer: "
265 "error sending on socket %d to scanner:"
267 so
->socket
, strerror(errno
), errno
));
268 if (errno
== ECONNREFUSED
|| errno
== ENOTCONN
269 || errno
== ECONNRESET
) {
270 if (connect_to_scanner(handle
) == -1)
271 break; /* connecting fails, abort */
273 } else if (errno
!= EINTR
) {
274 /* on EINTR we just try again, all remaining
275 other errors we log the error
276 and try again ONCE */
278 DEBUG(3,("scannedonly flush_sendbuffer: "
279 "error sending data to scanner: %s "
280 "(%d)\n", strerror(errno
), errno
));
283 /* --> partial write: Resend all filenames that were
284 not or not completely written. a partial filename
285 written means the filename will not arrive correctly,
286 so resend it completely */
289 char *tmp
= strchr(so
->gsendbuffer
+pos
, '\n');
290 if (tmp
&& tmp
- so
->gsendbuffer
< ret
)
291 pos
= tmp
- so
->gsendbuffer
+ 1;
295 memmove(so
->gsendbuffer
, so
->gsendbuffer
+ pos
,
296 SENDBUFFERSIZE
- ret
);
301 if (so
->gsendbuffer
[0] != '\0') {
303 ("scannedonly flush_sendbuffer: "
304 "failed to send files to AV scanner, "
305 "discarding files."));
306 so
->gsendbuffer
[0] = '\0';
310 static void notify_scanner(vfs_handle_struct
* handle
, const char *scanfile
)
313 int tmplen
, gsendlen
;
314 struct Tscannedonly
*so
= (struct Tscannedonly
*)handle
->data
;
315 TALLOC_CTX
*ctx
=talloc_tos();
316 if (scanfile
[0] != '/') {
317 tmp
= construct_full_path(ctx
,handle
, scanfile
, false);
319 tmp
= (const char *)scanfile
;
321 tmplen
= strlen(tmp
);
322 gsendlen
= strlen(so
->gsendbuffer
);
323 DEBUG(SCANNEDONLY_DEBUG
,
324 ("scannedonly notify_scanner: tmp=%s, tmplen=%d, gsendlen=%d\n",
325 tmp
, tmplen
, gsendlen
));
326 if (gsendlen
+ tmplen
>= SENDBUFFERSIZE
) {
327 flush_sendbuffer(handle
);
329 strlcat(so
->gsendbuffer
, tmp
, SENDBUFFERSIZE
+ 1);
330 strlcat(so
->gsendbuffer
, "\n", SENDBUFFERSIZE
+ 1);
333 static bool is_scannedonly_file(struct Tscannedonly
*so
, const char *shortname
)
335 if (shortname
[0]!='.') {
338 if (strncmp(shortname
, so
->p_scanned
, strlen(so
->p_scanned
)) == 0) {
341 if (strncmp(shortname
, so
->p_virus
, strlen(so
->p_virus
)) == 0) {
344 if (strncmp(shortname
, so
->p_failed
, strlen(so
->p_failed
)) == 0) {
350 static bool timespec_is_newer(struct timespec
*base
, struct timespec
*test
)
352 return timespec_compare(base
,test
) < 0;
356 vfs_handle_struct *handle the scannedonly handle
357 scannedonly_DIR * sDIR the scannedonly struct if called from _readdir()
359 fullpath is a full path starting from / or a relative path to the
360 current working directory
361 shortname is the filename without directory components
362 basename, is the directory without file name component
363 allow_nonexistant return TRUE if stat() on the requested file fails
364 recheck_time, the time in milliseconds to wait for the daemon to
365 create a .scanned file
366 recheck_tries, the number of tries to wait
367 recheck_size, size in Kb of files that should not be waited for
368 loop : boolean if we should try to loop over all files in the directory
369 and send a notify to the scanner for all files that need scanning
371 static bool scannedonly_allow_access(vfs_handle_struct
* handle
,
372 struct scannedonly_DIR
*sDIR
,
373 struct smb_filename
*smb_fname
,
374 const char *shortname
,
375 const char *base_name
,
376 int allow_nonexistant
,
377 int recheck_time
, int recheck_tries
,
378 int recheck_size
, int loop
)
380 struct smb_filename
*cache_smb_fname
;
381 TALLOC_CTX
*ctx
=talloc_tos();
385 DEBUG(SCANNEDONLY_DEBUG
,
386 ("smb_fname->base_name=%s, shortname=%s, base_name=%s\n"
387 ,smb_fname
->base_name
,shortname
,base_name
));
389 if (ISDOT(shortname
) || ISDOTDOT(shortname
)) {
392 if (is_scannedonly_file(STRUCTSCANO(handle
->data
), shortname
)) {
393 DEBUG(SCANNEDONLY_DEBUG
,
394 ("scannedonly_allow_access, %s is a scannedonly file, "
395 "return 0\n", shortname
));
399 if (!VALID_STAT(smb_fname
->st
)) {
400 DEBUG(SCANNEDONLY_DEBUG
,("stat %s\n",smb_fname
->base_name
));
401 retval
= SMB_VFS_NEXT_STAT(handle
, smb_fname
);
403 /* failed to stat this file?!? --> hide it */
404 DEBUG(SCANNEDONLY_DEBUG
,("no valid stat, return"
405 " allow_nonexistant=%d\n",
407 return allow_nonexistant
;
410 if (!S_ISREG(smb_fname
->st
.st_ex_mode
)) {
411 DEBUG(SCANNEDONLY_DEBUG
,
412 ("%s is not a regular file, ISDIR=%d\n",
413 smb_fname
->base_name
,
414 S_ISDIR(smb_fname
->st
.st_ex_mode
)));
415 return (STRUCTSCANO(handle
->data
)->
416 show_special_files
||
417 S_ISDIR(smb_fname
->st
.st_ex_mode
));
419 if (smb_fname
->st
.st_ex_size
== 0) {
420 DEBUG(SCANNEDONLY_DEBUG
,("empty file, return 1\n"));
421 return true; /* empty files cannot contain viruses ! */
423 cachefile
= cachefile_name(ctx
,
426 STRUCTSCANO(handle
->data
)->p_scanned
);
427 create_synthetic_smb_fname(ctx
, cachefile
,NULL
,NULL
,&cache_smb_fname
);
428 if (!VALID_STAT(cache_smb_fname
->st
)) {
429 retval
= SMB_VFS_NEXT_STAT(handle
, cache_smb_fname
);
431 if (retval
== 0 && VALID_STAT(cache_smb_fname
->st
)) {
432 if (timespec_is_newer(&smb_fname
->st
.st_ex_ctime
,
433 &cache_smb_fname
->st
.st_ex_ctime
)) {
434 talloc_free(cache_smb_fname
);
437 /* no cachefile or too old */
438 SMB_VFS_NEXT_UNLINK(handle
, cache_smb_fname
);
442 notify_scanner(handle
, smb_fname
->base_name
);
445 if (loop
&& sDIR
&& !sDIR
->notify_loop_done
) {
446 /* check the rest of the directory and notify the
447 scanner if some file needs scanning */
449 SMB_STRUCT_DIRENT
*dire
;
451 offset
= SMB_VFS_NEXT_TELLDIR(handle
, sDIR
->DIR);
452 dire
= SMB_VFS_NEXT_READDIR(handle
, sDIR
->DIR, NULL
);
455 struct smb_filename
*smb_fname2
;
456 fpath2
= talloc_asprintf(ctx
, "%s%s", base_name
,dire
->d_name
);
457 DEBUG(SCANNEDONLY_DEBUG
,
458 ("scannedonly_allow_access in loop, "
459 "found %s\n", fpath2
));
460 create_synthetic_smb_fname(ctx
, fpath2
,NULL
,NULL
,
462 scannedonly_allow_access(handle
, NULL
,
465 base_name
, 0, 0, 0, 0, 0);
467 talloc_free(smb_fname2
);
468 dire
= SMB_VFS_NEXT_READDIR(handle
, sDIR
->DIR,NULL
);
470 sDIR
->notify_loop_done
= 1;
472 SMB_VFS_NEXT_SEEKDIR(handle
, sDIR
->DIR, offset
);
475 && ((recheck_size
> 0
476 && smb_fname
->st
.st_ex_size
< (1024 * recheck_size
))
479 flush_sendbuffer(handle
);
480 while (retval
!= 0 /*&& errno == ENOENT */
481 && i
< recheck_tries
) {
482 DEBUG(SCANNEDONLY_DEBUG
,
483 ("scannedonly_allow_access, wait (try=%d "
484 "(max %d), %d ms) for %s\n",
486 recheck_time
, cache_smb_fname
->base_name
));
487 smb_msleep(recheck_time
);
488 retval
= SMB_VFS_NEXT_STAT(handle
, cache_smb_fname
);
492 /* still no cachefile, or still too old, return 0 */
494 || !timespec_is_newer(&smb_fname
->st
.st_ex_ctime
,
495 &cache_smb_fname
->st
.st_ex_ctime
)) {
496 DEBUG(SCANNEDONLY_DEBUG
,
497 ("retval=%d, return 0\n",retval
));
503 /*********************/
505 /*********************/
507 static SMB_STRUCT_DIR
*scannedonly_opendir(vfs_handle_struct
* handle
,
509 const char *mask
, uint32 attr
)
511 SMB_STRUCT_DIR
*DIRp
;
512 struct scannedonly_DIR
*sDIR
;
514 DIRp
= SMB_VFS_NEXT_OPENDIR(handle
, fname
, mask
, attr
);
519 sDIR
= talloc(NULL
, struct scannedonly_DIR
);
520 if (fname
[0] != '/') {
521 sDIR
->base
= construct_full_path(sDIR
,handle
, fname
, true);
523 sDIR
->base
= name_w_ending_slash(sDIR
, fname
);
525 DEBUG(SCANNEDONLY_DEBUG
,
526 ("scannedonly_opendir, fname=%s, base=%s\n",fname
,sDIR
->base
));
528 sDIR
->notify_loop_done
= 0;
529 return (SMB_STRUCT_DIR
*) sDIR
;
532 static SMB_STRUCT_DIR
*scannedonly_fdopendir(vfs_handle_struct
* handle
,
534 const char *mask
, uint32 attr
)
536 SMB_STRUCT_DIR
*DIRp
;
537 struct scannedonly_DIR
*sDIR
;
540 DIRp
= SMB_VFS_NEXT_FDOPENDIR(handle
, fsp
, mask
, attr
);
545 fname
= (const char *)fsp
->fsp_name
->base_name
;
547 sDIR
= talloc(NULL
, struct scannedonly_DIR
);
548 if (fname
[0] != '/') {
549 sDIR
->base
= construct_full_path(sDIR
,handle
, fname
, true);
551 sDIR
->base
= name_w_ending_slash(sDIR
, fname
);
553 DEBUG(SCANNEDONLY_DEBUG
,
554 ("scannedonly_fdopendir, fname=%s, base=%s\n",fname
,sDIR
->base
));
556 sDIR
->notify_loop_done
= 0;
557 return (SMB_STRUCT_DIR
*) sDIR
;
561 static SMB_STRUCT_DIRENT
*scannedonly_readdir(vfs_handle_struct
*handle
,
562 SMB_STRUCT_DIR
* dirp
,
563 SMB_STRUCT_STAT
*sbuf
)
565 SMB_STRUCT_DIRENT
*result
;
568 struct smb_filename
*smb_fname
;
571 SMB_STRUCT_DIRENT
*newdirent
;
572 TALLOC_CTX
*ctx
=talloc_tos();
574 struct scannedonly_DIR
*sDIR
= (struct scannedonly_DIR
*)dirp
;
579 result
= SMB_VFS_NEXT_READDIR(handle
, sDIR
->DIR, sbuf
);
584 if (is_scannedonly_file(STRUCTSCANO(handle
->data
), result
->d_name
)) {
585 DEBUG(SCANNEDONLY_DEBUG
,
586 ("scannedonly_readdir, %s is a scannedonly file, "
587 "skip to next entry\n", result
->d_name
));
588 return scannedonly_readdir(handle
, dirp
, NULL
);
590 tmp
= talloc_asprintf(ctx
, "%s%s", sDIR
->base
, result
->d_name
);
591 DEBUG(SCANNEDONLY_DEBUG
,
592 ("scannedonly_readdir, check access to %s (sbuf=%p)\n",
595 /* even if we don't hide nonscanned files or we allow non scanned
596 files we call allow_access because it will notify the daemon to
598 create_synthetic_smb_fname(ctx
, tmp
,NULL
,
599 sbuf
?VALID_STAT(*sbuf
)?sbuf
:NULL
:NULL
,
601 allowed
= scannedonly_allow_access(
602 handle
, sDIR
, smb_fname
,
605 STRUCTSCANO(handle
->data
)->hide_nonscanned_files
606 ? STRUCTSCANO(handle
->data
)->recheck_time_readdir
608 STRUCTSCANO(handle
->data
)->recheck_tries_readdir
,
611 DEBUG(SCANNEDONLY_DEBUG
,
612 ("scannedonly_readdir access to %s (%s) = %d\n", tmp
,
613 result
->d_name
, allowed
));
617 DEBUG(SCANNEDONLY_DEBUG
,
618 ("hide_nonscanned_files=%d, allow_nonscanned_files=%d\n",
619 STRUCTSCANO(handle
->data
)->hide_nonscanned_files
,
620 STRUCTSCANO(handle
->data
)->allow_nonscanned_files
623 if (!STRUCTSCANO(handle
->data
)->hide_nonscanned_files
624 || STRUCTSCANO(handle
->data
)->allow_nonscanned_files
) {
628 DEBUG(SCANNEDONLY_DEBUG
,
629 ("scannedonly_readdir, readdir listing for %s not "
630 "allowed, notify user\n", result
->d_name
));
631 notify_name
= talloc_asprintf(
632 ctx
,"%s %s",result
->d_name
,
633 STRUCTSCANO(handle
->data
)->scanning_message
);
634 namelen
= strlen(notify_name
);
635 newdirent
= (SMB_STRUCT_DIRENT
*)talloc_array(
636 ctx
, char, sizeof(SMB_STRUCT_DIRENT
) + namelen
+ 1);
640 memcpy(newdirent
, result
, sizeof(SMB_STRUCT_DIRENT
));
641 memcpy(&newdirent
->d_name
, notify_name
, namelen
+ 1);
642 DEBUG(SCANNEDONLY_DEBUG
,
643 ("scannedonly_readdir, return newdirent at %p with "
644 "notification %s\n", newdirent
, newdirent
->d_name
));
648 static void scannedonly_seekdir(struct vfs_handle_struct
*handle
,
649 SMB_STRUCT_DIR
* dirp
, long offset
)
651 struct scannedonly_DIR
*sDIR
= (struct scannedonly_DIR
*)dirp
;
652 SMB_VFS_NEXT_SEEKDIR(handle
, sDIR
->DIR, offset
);
655 static long scannedonly_telldir(struct vfs_handle_struct
*handle
,
656 SMB_STRUCT_DIR
* dirp
)
658 struct scannedonly_DIR
*sDIR
= (struct scannedonly_DIR
*)dirp
;
659 return SMB_VFS_NEXT_TELLDIR(handle
, sDIR
->DIR);
662 static void scannedonly_rewinddir(struct vfs_handle_struct
*handle
,
663 SMB_STRUCT_DIR
* dirp
)
665 struct scannedonly_DIR
*sDIR
= (struct scannedonly_DIR
*)dirp
;
666 SMB_VFS_NEXT_REWINDDIR(handle
, sDIR
->DIR);
669 static int scannedonly_closedir(vfs_handle_struct
* handle
,
670 SMB_STRUCT_DIR
* dirp
)
673 struct scannedonly_DIR
*sDIR
= (struct scannedonly_DIR
*)dirp
;
674 flush_sendbuffer(handle
);
675 retval
= SMB_VFS_NEXT_CLOSEDIR(handle
, sDIR
->DIR);
680 static int scannedonly_stat(vfs_handle_struct
* handle
,
681 struct smb_filename
*smb_fname
)
684 ret
= SMB_VFS_NEXT_STAT(handle
, smb_fname
);
685 DEBUG(SCANNEDONLY_DEBUG
, ("scannedonly_stat: %s returned %d\n",
686 smb_fname
->base_name
, ret
));
687 if (ret
!= 0 && errno
== ENOENT
) {
688 TALLOC_CTX
*ctx
=talloc_tos();
689 char *test_base_name
, *tmp_base_name
= smb_fname
->base_name
;
690 /* possibly this was a fake name (file is being scanned for
691 viruses.txt): check for that and create the real name and
692 stat the real name */
693 test_base_name
= real_path_from_notify_path(
695 STRUCTSCANO(handle
->data
),
696 smb_fname
->base_name
);
697 if (test_base_name
) {
698 smb_fname
->base_name
= test_base_name
;
699 ret
= SMB_VFS_NEXT_STAT(handle
, smb_fname
);
700 DEBUG(5, ("_stat: %s returned %d\n",
701 test_base_name
, ret
));
702 smb_fname
->base_name
= tmp_base_name
;
708 static int scannedonly_lstat(vfs_handle_struct
* handle
,
709 struct smb_filename
*smb_fname
)
712 ret
= SMB_VFS_NEXT_LSTAT(handle
, smb_fname
);
713 DEBUG(SCANNEDONLY_DEBUG
, ("scannedonly_lstat: %s returned %d\n",
714 smb_fname
->base_name
, ret
));
715 if (ret
!= 0 && errno
== ENOENT
) {
716 TALLOC_CTX
*ctx
=talloc_tos();
717 char *test_base_name
, *tmp_base_name
= smb_fname
->base_name
;
718 /* possibly this was a fake name (file is being scanned for
719 viruses.txt): check for that and create the real name and
720 stat the real name */
721 test_base_name
= real_path_from_notify_path(
722 ctx
, STRUCTSCANO(handle
->data
), smb_fname
->base_name
);
723 if (test_base_name
) {
724 smb_fname
->base_name
= test_base_name
;
725 ret
= SMB_VFS_NEXT_LSTAT(handle
, smb_fname
);
726 DEBUG(5, ("_lstat: %s returned %d\n",
727 test_base_name
, ret
));
728 smb_fname
->base_name
= tmp_base_name
;
734 static int scannedonly_open(vfs_handle_struct
* handle
,
735 struct smb_filename
*smb_fname
,
736 files_struct
* fsp
, int flags
, mode_t mode
)
739 char *tmp
, *shortname
;
740 int allowed
, write_access
= 0;
741 TALLOC_CTX
*ctx
=talloc_tos();
742 /* if open for writing ignore it */
743 if ((flags
& O_ACCMODE
) == O_WRONLY
) {
744 return SMB_VFS_NEXT_OPEN(handle
, smb_fname
, fsp
, flags
, mode
);
746 if ((flags
& O_ACCMODE
) == O_RDWR
) {
749 /* check if this file is scanned already */
750 tmp
= strrchr(smb_fname
->base_name
, '/');
752 base
= talloc_strndup(ctx
,smb_fname
->base_name
,
753 (tmp
- smb_fname
->base_name
) + 1);
757 shortname
= (char *)smb_fname
->base_name
;
759 allowed
= scannedonly_allow_access(
760 handle
, NULL
, smb_fname
, shortname
,
763 STRUCTSCANO(handle
->data
)->recheck_time_open
,
764 STRUCTSCANO(handle
->data
)->recheck_tries_open
,
765 STRUCTSCANO(handle
->data
)->recheck_size_open
,
767 flush_sendbuffer(handle
);
768 DEBUG(SCANNEDONLY_DEBUG
, ("scannedonly_open: allow=%d for %s\n",
769 allowed
, smb_fname
->base_name
));
771 || STRUCTSCANO(handle
->data
)->allow_nonscanned_files
) {
772 return SMB_VFS_NEXT_OPEN(handle
, smb_fname
, fsp
, flags
, mode
);
778 static int scannedonly_close(vfs_handle_struct
* handle
, files_struct
* fsp
)
780 /* we only have to notify the scanner
781 for files that were open readwrite or writable. */
782 if (fsp
->can_write
) {
783 TALLOC_CTX
*ctx
= talloc_tos();
784 notify_scanner(handle
, construct_full_path(
786 fsp
->fsp_name
->base_name
,false));
787 flush_sendbuffer(handle
);
789 return SMB_VFS_NEXT_CLOSE(handle
, fsp
);
792 static int scannedonly_rename(vfs_handle_struct
* handle
,
793 const struct smb_filename
*smb_fname_src
,
794 const struct smb_filename
*smb_fname_dst
)
796 /* rename the cache file before we pass the actual rename on */
797 struct smb_filename
*smb_fname_src_tmp
= NULL
;
798 struct smb_filename
*smb_fname_dst_tmp
= NULL
;
799 char *cachefile_src
, *cachefile_dst
;
800 bool needscandst
=false;
802 TALLOC_CTX
*ctx
= talloc_tos();
804 /* Setup temporary smb_filename structs. */
805 cachefile_src
= cachefile_name_f_fullpath(
807 smb_fname_src
->base_name
,
808 STRUCTSCANO(handle
->data
)->p_scanned
);
809 cachefile_dst
= cachefile_name_f_fullpath(
811 smb_fname_dst
->base_name
,
812 STRUCTSCANO(handle
->data
)->p_scanned
);
813 create_synthetic_smb_fname(ctx
, cachefile_src
,NULL
,NULL
,
815 create_synthetic_smb_fname(ctx
, cachefile_dst
,NULL
,NULL
,
818 ret
= SMB_VFS_NEXT_RENAME(handle
, smb_fname_src_tmp
, smb_fname_dst_tmp
);
821 } else if (ret
!= 0) {
822 DEBUG(SCANNEDONLY_DEBUG
,
823 ("failed to rename %s into %s error %d: %s\n", cachefile_src
,
824 cachefile_dst
, ret
, strerror(ret
)));
827 ret
= SMB_VFS_NEXT_RENAME(handle
, smb_fname_src
, smb_fname_dst
);
828 if (ret
== 0 && needscandst
) {
829 notify_scanner(handle
, smb_fname_dst
->base_name
);
830 flush_sendbuffer(handle
);
835 static int scannedonly_unlink(vfs_handle_struct
* handle
,
836 const struct smb_filename
*smb_fname
)
838 /* unlink the 'scanned' file too */
839 struct smb_filename
*smb_fname_cache
= NULL
;
841 TALLOC_CTX
*ctx
= talloc_tos();
843 cachefile
= cachefile_name_f_fullpath(
845 smb_fname
->base_name
,
846 STRUCTSCANO(handle
->data
)->p_scanned
);
847 create_synthetic_smb_fname(ctx
, cachefile
,NULL
,NULL
,
849 if (SMB_VFS_NEXT_UNLINK(handle
, smb_fname_cache
) != 0) {
850 DEBUG(SCANNEDONLY_DEBUG
, ("_unlink: failed to unlink %s\n",
851 smb_fname_cache
->base_name
));
853 return SMB_VFS_NEXT_UNLINK(handle
, smb_fname
);
856 static int scannedonly_rmdir(vfs_handle_struct
* handle
, const char *path
)
858 /* if there are only .scanned: .virus: or .failed: files, we delete
859 those, because the client cannot see them */
861 SMB_STRUCT_DIRENT
*dire
;
862 TALLOC_CTX
*ctx
= talloc_tos();
863 bool only_deletable_files
= true, have_files
= false;
866 if (!STRUCTSCANO(handle
->data
)->rm_hidden_files_on_rmdir
)
867 return SMB_VFS_NEXT_RMDIR(handle
, path
);
869 path_w_slash
= name_w_ending_slash(ctx
,path
);
870 dirp
= SMB_VFS_NEXT_OPENDIR(handle
, path
, NULL
, 0);
874 while ((dire
= SMB_VFS_NEXT_READDIR(handle
, dirp
, NULL
)) != NULL
) {
875 if (ISDOT(dire
->d_name
) || ISDOTDOT(dire
->d_name
)) {
879 if (!is_scannedonly_file(STRUCTSCANO(handle
->data
),
881 struct smb_filename
*smb_fname
= NULL
;
885 if (STRUCTSCANO(handle
->data
)->show_special_files
) {
886 only_deletable_files
= false;
889 /* stat the file and see if it is a
891 fullpath
= talloc_asprintf(ctx
, "%s%s", path_w_slash
,
893 create_synthetic_smb_fname(ctx
, fullpath
,NULL
,NULL
,
895 retval
= SMB_VFS_NEXT_STAT(handle
, smb_fname
);
897 && S_ISREG(smb_fname
->st
.st_ex_mode
)) {
898 only_deletable_files
= false;
900 TALLOC_FREE(fullpath
);
901 TALLOC_FREE(smb_fname
);
905 DEBUG(SCANNEDONLY_DEBUG
,
906 ("path=%s, have_files=%d, only_deletable_files=%d\n",
907 path
, have_files
, only_deletable_files
));
908 if (have_files
&& only_deletable_files
) {
909 DEBUG(SCANNEDONLY_DEBUG
,
910 ("scannedonly_rmdir, remove leftover scannedonly "
911 "files from %s\n", path_w_slash
));
912 SMB_VFS_NEXT_REWINDDIR(handle
, dirp
);
913 while ((dire
= SMB_VFS_NEXT_READDIR(handle
, dirp
, NULL
))
916 struct smb_filename
*smb_fname
= NULL
;
917 if (ISDOT(dire
->d_name
) || ISDOTDOT(dire
->d_name
)) {
920 fullpath
= talloc_asprintf(ctx
, "%s%s", path_w_slash
,
922 create_synthetic_smb_fname(ctx
, fullpath
,NULL
,NULL
,
924 DEBUG(SCANNEDONLY_DEBUG
, ("unlink %s\n", fullpath
));
925 SMB_VFS_NEXT_UNLINK(handle
, smb_fname
);
926 TALLOC_FREE(fullpath
);
927 TALLOC_FREE(smb_fname
);
930 SMB_VFS_NEXT_CLOSEDIR(handle
, dirp
);
931 return SMB_VFS_NEXT_RMDIR(handle
, path
);
934 static void free_scannedonly_data(void **data
)
939 static int scannedonly_connect(struct vfs_handle_struct
*handle
,
940 const char *service
, const char *user
)
943 struct Tscannedonly
*so
;
945 so
= SMB_MALLOC_P(struct Tscannedonly
);
946 handle
->data
= (void *)so
;
947 handle
->free_data
= free_scannedonly_data
;
948 so
->gsendbuffer
[0]='\0';
950 lp_parm_bool(SNUM(handle
->conn
), "scannedonly",
951 "domain_socket", True
);
952 so
->socketname
= lp_parm_const_string(SNUM(handle
->conn
),
953 "scannedonly", "socketname",
954 "/var/lib/scannedonly/scan");
957 lp_parm_int(SNUM(handle
->conn
), "scannedonly", "portnum",
959 so
->scanhost
= lp_parm_const_string(SNUM(handle
->conn
),
960 "scannedonly", "scanhost",
963 so
->show_special_files
=
964 lp_parm_bool(SNUM(handle
->conn
), "scannedonly",
965 "show_special_files", True
);
966 so
->rm_hidden_files_on_rmdir
=
967 lp_parm_bool(SNUM(handle
->conn
), "scannedonly",
968 "rm_hidden_files_on_rmdir", True
);
969 so
->hide_nonscanned_files
=
970 lp_parm_bool(SNUM(handle
->conn
), "scannedonly",
971 "hide_nonscanned_files", False
);
972 so
->allow_nonscanned_files
=
973 lp_parm_bool(SNUM(handle
->conn
), "scannedonly",
974 "allow_nonscanned_files", False
);
975 so
->scanning_message
= lp_parm_const_string(SNUM(handle
->conn
),
978 "is being scanned for viruses");
979 so
->scanning_message_len
= strlen(so
->scanning_message
);
980 so
->recheck_time_open
=
981 lp_parm_int(SNUM(handle
->conn
), "scannedonly",
982 "recheck_time_open", 50);
983 so
->recheck_tries_open
=
984 lp_parm_int(SNUM(handle
->conn
), "scannedonly",
985 "recheck_tries_open", 100);
986 so
->recheck_size_open
=
987 lp_parm_int(SNUM(handle
->conn
), "scannedonly",
988 "recheck_size_open", 100);
989 so
->recheck_time_readdir
=
990 lp_parm_int(SNUM(handle
->conn
), "scannedonly",
991 "recheck_time_readdir", 50);
992 so
->recheck_tries_readdir
=
993 lp_parm_int(SNUM(handle
->conn
), "scannedonly",
994 "recheck_tries_readdir", 20);
997 lp_parm_const_string(SNUM(handle
->conn
),
1002 lp_parm_const_string(SNUM(handle
->conn
),
1007 lp_parm_const_string(SNUM(handle
->conn
),
1011 connect_to_scanner(handle
);
1013 return SMB_VFS_NEXT_CONNECT(handle
, service
, user
);
1016 /* VFS operations structure */
1017 static struct vfs_fn_pointers vfs_scannedonly_fns
= {
1018 .opendir
= scannedonly_opendir
,
1019 .fdopendir
= scannedonly_fdopendir
,
1020 .readdir
= scannedonly_readdir
,
1021 .seekdir
= scannedonly_seekdir
,
1022 .telldir
= scannedonly_telldir
,
1023 .rewind_dir
= scannedonly_rewinddir
,
1024 .closedir
= scannedonly_closedir
,
1025 .rmdir
= scannedonly_rmdir
,
1026 .stat
= scannedonly_stat
,
1027 .lstat
= scannedonly_lstat
,
1028 .open_fn
= scannedonly_open
,
1029 .close_fn
= scannedonly_close
,
1030 .rename
= scannedonly_rename
,
1031 .unlink
= scannedonly_unlink
,
1032 .connect_fn
= scannedonly_connect
1035 NTSTATUS
vfs_scannedonly_init(void)
1037 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION
, "scannedonly",
1038 &vfs_scannedonly_fns
);