2 * scannedonly VFS module for Samba 3.5
4 * Copyright 2007,2008,2009 (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).
54 #define SENDBUFFERSIZE 1450
60 int scanning_message_len
;
61 int recheck_time_open
;
62 int recheck_tries_open
;
63 int recheck_size_open
;
64 int recheck_time_readdir
;
65 int recheck_tries_readdir
;
66 bool show_special_files
;
67 bool rm_hidden_files_on_rmdir
;
68 bool hide_nonscanned_files
;
69 bool allow_nonscanned_files
;
72 char *scanning_message
;
73 char *p_scanned
; /* prefix for scanned files */
74 char *p_virus
; /* prefix for virus containing files */
75 char *p_failed
; /* prefix for failed to scan files */
76 char gsendbuffer
[SENDBUFFERSIZE
+ 1];
79 #define STRUCTSCANO(var) ((struct Tscannedonly *)var)
81 struct scannedonly_DIR
{
86 #define SCANNEDONLY_DEBUG 9
87 /*********************/
88 /* utility functions */
89 /*********************/
91 static char *real_path_from_notify_path(TALLOC_CTX
*ctx
,
92 struct Tscannedonly
*so
,
98 name
= strrchr(path
, '/');
102 pathlen
= name
- path
;
105 if (len
<= so
->scanning_message_len
) {
109 if (strcmp(name
+ (len
- so
->scanning_message_len
),
110 so
->scanning_message
) != 0) {
114 return talloc_strndup(ctx
,path
,
115 pathlen
+ len
- so
->scanning_message_len
);
118 static char *cachefile_name(TALLOC_CTX
*ctx
,
119 const char *shortname
,
121 const char *p_scanned
)
123 return talloc_asprintf(ctx
, "%s%s%s", base
, p_scanned
, shortname
);
126 static char *name_w_ending_slash(TALLOC_CTX
*ctx
, const char *name
)
128 int len
= strlen(name
);
129 if (name
[len
- 1] == '/') {
130 return talloc_strdup(ctx
,name
);
132 return talloc_asprintf(ctx
, "%s/", name
);
136 static char *cachefile_name_f_fullpath(TALLOC_CTX
*ctx
,
137 const char *fullpath
,
138 const char *p_scanned
)
141 char *tmp
, *cachefile
, *shortname
;
142 tmp
= strrchr(fullpath
, '/');
144 base
= talloc_strndup(ctx
, fullpath
, (tmp
- fullpath
) + 1);
148 shortname
= (char *)fullpath
;
150 cachefile
= cachefile_name(ctx
, shortname
, base
, p_scanned
);
151 DEBUG(SCANNEDONLY_DEBUG
,
152 ("cachefile_name_f_fullpath cachefile=%s\n", cachefile
));
156 static char *construct_full_path(TALLOC_CTX
*ctx
, vfs_handle_struct
* handle
,
157 const char *somepath
, bool ending_slash
)
164 if (somepath
[0] == '/') {
166 return name_w_ending_slash(ctx
,somepath
);
168 return talloc_strdup(ctx
,somepath
);
170 tmp
=(char *)somepath
;
171 if (tmp
[0]=='.'&&tmp
[1]=='/') {
174 /* vfs_GetWd() seems to return a path with a slash */
176 return talloc_asprintf(ctx
, "%s/%s/",
177 vfs_GetWd(ctx
, handle
->conn
),tmp
);
179 return talloc_asprintf(ctx
, "%s/%s",
180 vfs_GetWd(ctx
, handle
->conn
),tmp
);
183 static int connect_to_scanner(vfs_handle_struct
* handle
)
185 struct Tscannedonly
*so
= (struct Tscannedonly
*)handle
->data
;
187 if (so
->domain_socket
) {
188 struct sockaddr_un saun
;
189 DEBUG(SCANNEDONLY_DEBUG
, ("socket=%s\n", so
->socketname
));
190 if ((so
->socket
= socket(AF_UNIX
, SOCK_DGRAM
, 0)) < 0) {
191 DEBUG(2, ("failed to create socket %s\n",
195 saun
.sun_family
= AF_UNIX
;
196 strncpy(saun
.sun_path
, so
->socketname
,
197 sizeof(saun
.sun_path
) - 1);
198 if (connect(so
->socket
, (struct sockaddr
*)(void *)&saun
,
199 SUN_LEN(&saun
)) < 0) {
200 DEBUG(2, ("failed to connect to socket %s\n",
204 DEBUG(SCANNEDONLY_DEBUG
,("bound %s to socket %d\n",
205 saun
.sun_path
, so
->socket
));
208 so
->socket
= open_udp_socket(so
->scanhost
, so
->portnum
);
209 if (so
->socket
< 0) {
210 DEBUG(2,("failed to open UDP socket to %s:%d\n",
211 so
->scanhost
,so
->portnum
));
216 {/* increasing the socket buffer is done because we have large bursts
217 of UDP packets or DGRAM's on a domain socket whenever we hit a
218 large directory with lots of unscanned files. */
220 socklen_t size
= sizeof(int);
221 getsockopt(so
->socket
, SOL_SOCKET
, SO_RCVBUF
,
222 (char *)&sndsize
, &size
);
223 DEBUG(SCANNEDONLY_DEBUG
, ("current socket buffer size=%d\n",
226 if (setsockopt(so
->socket
, SOL_SOCKET
, SO_RCVBUF
,
228 (int)sizeof(sndsize
)) != 0) {
229 DEBUG(SCANNEDONLY_DEBUG
,
230 ("error setting socket buffer %s (%d)\n",
231 strerror(errno
), errno
));
234 set_blocking(so
->socket
, false);
238 static void flush_sendbuffer(vfs_handle_struct
* handle
)
240 struct Tscannedonly
*so
= (struct Tscannedonly
*)handle
->data
;
241 int ret
, len
, loop
= 10;
242 if (so
->gsendbuffer
[0] == '\0') {
248 len
= strlen(so
->gsendbuffer
);
249 ret
= send(so
->socket
, so
->gsendbuffer
, len
, 0);
251 so
->gsendbuffer
[0] = '\0';
255 DEBUG(3,("scannedonly flush_sendbuffer: "
256 "error sending on socket %d to scanner:"
258 so
->socket
, strerror(errno
), errno
));
259 if (errno
== ECONNREFUSED
|| errno
== ENOTCONN
260 || errno
== ECONNRESET
) {
261 if (connect_to_scanner(handle
) == -1)
262 break; /* connecting fails, abort */
264 } else if (errno
!= EINTR
) {
265 /* on EINTR we just try again, all remaining
266 other errors we log the error
267 and try again ONCE */
269 DEBUG(3,("scannedonly flush_sendbuffer: "
270 "error sending data to scanner: %s "
271 "(%d)\n", strerror(errno
), errno
));
274 /* --> partial write: Resend all filenames that were
275 not or not completely written. a partial filename
276 written means the filename will not arrive correctly,
277 so resend it completely */
280 char *tmp
= strchr(so
->gsendbuffer
+pos
, '\n');
281 if (tmp
&& tmp
- so
->gsendbuffer
< ret
)
282 pos
= tmp
- so
->gsendbuffer
+ 1;
286 memmove(so
->gsendbuffer
, so
->gsendbuffer
+ pos
,
287 SENDBUFFERSIZE
- ret
);
292 if (so
->gsendbuffer
[0] != '\0') {
294 ("scannedonly flush_sendbuffer: "
295 "failed to send files to AV scanner, "
296 "discarding files."));
297 so
->gsendbuffer
[0] = '\0';
301 static void notify_scanner(vfs_handle_struct
* handle
, const char *scanfile
)
304 int tmplen
, gsendlen
;
305 struct Tscannedonly
*so
= (struct Tscannedonly
*)handle
->data
;
306 TALLOC_CTX
*ctx
=talloc_tos();
307 if (scanfile
[0] != '/') {
308 tmp
= construct_full_path(ctx
,handle
, scanfile
, false);
310 tmp
= (char *)scanfile
;
312 tmplen
= strlen(tmp
);
313 gsendlen
= strlen(so
->gsendbuffer
);
314 DEBUG(SCANNEDONLY_DEBUG
,
315 ("scannedonly notify_scanner: tmp=%s, tmplen=%d, gsendlen=%d\n",
316 tmp
, tmplen
, gsendlen
));
317 if (gsendlen
+ tmplen
>= SENDBUFFERSIZE
) {
318 flush_sendbuffer(handle
);
320 strlcat(so
->gsendbuffer
, tmp
, SENDBUFFERSIZE
+ 1);
321 strlcat(so
->gsendbuffer
, "\n", SENDBUFFERSIZE
+ 1);
324 static bool is_scannedonly_file(struct Tscannedonly
*so
, const char *shortname
)
326 if (shortname
[0]!='.') {
329 if (strncmp(shortname
, so
->p_scanned
, strlen(so
->p_scanned
)) == 0) {
332 if (strncmp(shortname
, so
->p_virus
, strlen(so
->p_virus
)) == 0) {
335 if (strncmp(shortname
, so
->p_failed
, strlen(so
->p_failed
)) == 0) {
341 static bool timespec_is_newer(struct timespec
*base
, struct timespec
*test
)
343 return timespec_compare(base
,test
) < 0;
347 vfs_handle_struct *handle the scannedonly handle
348 scannedonly_DIR * sDIR the scannedonly struct if called from _readdir()
350 fullpath is a full path starting from / or a relative path to the
351 current working directory
352 shortname is the filename without directory components
353 basename, is the directory without file name component
354 allow_nonexistant return TRUE if stat() on the requested file fails
355 recheck_time, the time in milliseconds to wait for the daemon to
356 create a .scanned file
357 recheck_tries, the number of tries to wait
358 recheck_size, size in Kb of files that should not be waited for
359 loop : boolean if we should try to loop over all files in the directory
360 and send a notify to the scanner for all files that need scanning
362 static bool scannedonly_allow_access(vfs_handle_struct
* handle
,
363 struct scannedonly_DIR
*sDIR
,
364 struct smb_filename
*smb_fname
,
365 const char *shortname
,
366 const char *base_name
,
367 int allow_nonexistant
,
368 int recheck_time
, int recheck_tries
,
369 int recheck_size
, int loop
)
371 struct smb_filename
*cache_smb_fname
;
372 TALLOC_CTX
*ctx
=talloc_tos();
376 DEBUG(SCANNEDONLY_DEBUG
,
377 ("smb_fname->base_name=%s, shortname=%s, base_name=%s\n"
378 ,smb_fname
->base_name
,shortname
,base_name
));
380 if (ISDOT(shortname
) || ISDOTDOT(shortname
)) {
383 if (is_scannedonly_file(STRUCTSCANO(handle
->data
), shortname
)) {
384 DEBUG(SCANNEDONLY_DEBUG
,
385 ("scannedonly_allow_access, %s is a scannedonly file, "
386 "return 0\n", shortname
));
390 if (!VALID_STAT(smb_fname
->st
)) {
391 DEBUG(SCANNEDONLY_DEBUG
,("stat %s\n",smb_fname
->base_name
));
392 retval
= SMB_VFS_NEXT_STAT(handle
, smb_fname
);
394 /* failed to stat this file?!? --> hide it */
395 DEBUG(SCANNEDONLY_DEBUG
,("no valid stat, return"
396 " allow_nonexistant=%d\n",
398 return allow_nonexistant
;
401 if (!S_ISREG(smb_fname
->st
.st_ex_mode
)) {
402 DEBUG(SCANNEDONLY_DEBUG
,
403 ("%s is not a regular file, ISDIR=%d\n",
404 smb_fname
->base_name
,
405 S_ISDIR(smb_fname
->st
.st_ex_mode
)));
406 return (STRUCTSCANO(handle
->data
)->
407 show_special_files
||
408 S_ISDIR(smb_fname
->st
.st_ex_mode
));
410 if (smb_fname
->st
.st_ex_size
== 0) {
411 DEBUG(SCANNEDONLY_DEBUG
,("empty file, return 1\n"));
412 return true; /* empty files cannot contain viruses ! */
414 cachefile
= cachefile_name(ctx
,
417 STRUCTSCANO(handle
->data
)->p_scanned
);
418 create_synthetic_smb_fname(ctx
, cachefile
,NULL
,NULL
,&cache_smb_fname
);
419 if (!VALID_STAT(cache_smb_fname
->st
)) {
420 retval
= SMB_VFS_NEXT_STAT(handle
, cache_smb_fname
);
422 if (retval
== 0 && VALID_STAT(cache_smb_fname
->st
)) {
423 if (timespec_is_newer(&smb_fname
->st
.st_ex_mtime
,
424 &cache_smb_fname
->st
.st_ex_mtime
)) {
425 talloc_free(cache_smb_fname
);
428 /* no cachefile or too old */
429 SMB_VFS_NEXT_UNLINK(handle
, cache_smb_fname
);
433 notify_scanner(handle
, smb_fname
->base_name
);
436 if (loop
&& sDIR
&& !sDIR
->notify_loop_done
) {
437 /* check the rest of the directory and notify the
438 scanner if some file needs scanning */
440 SMB_STRUCT_DIRENT
*dire
;
442 offset
= SMB_VFS_NEXT_TELLDIR(handle
, sDIR
->DIR);
443 dire
= SMB_VFS_NEXT_READDIR(handle
, sDIR
->DIR, NULL
);
446 struct smb_filename
*smb_fname2
;
447 fpath2
= talloc_asprintf(ctx
, "%s%s", base_name
,dire
->d_name
);
448 DEBUG(SCANNEDONLY_DEBUG
,
449 ("scannedonly_allow_access in loop, "
450 "found %s\n", fpath2
));
451 create_synthetic_smb_fname(ctx
, fpath2
,NULL
,NULL
,
453 scannedonly_allow_access(handle
, NULL
,
456 base_name
, 0, 0, 0, 0, 0);
458 talloc_free(smb_fname2
);
459 dire
= SMB_VFS_NEXT_READDIR(handle
, sDIR
->DIR,NULL
);
461 sDIR
->notify_loop_done
= 1;
463 SMB_VFS_NEXT_SEEKDIR(handle
, sDIR
->DIR, offset
);
466 && ((recheck_size
> 0
467 && smb_fname
->st
.st_ex_size
< (1024 * recheck_size
))
470 flush_sendbuffer(handle
);
471 while (retval
!= 0 /*&& errno == ENOENT */
472 && i
< recheck_tries
) {
473 struct timespec req
= { 0, recheck_time
* 10000 };
474 DEBUG(SCANNEDONLY_DEBUG
,
475 ("scannedonly_allow_access, wait (try=%d "
476 "(max %d), %d ms) for %s\n",
478 recheck_time
, cache_smb_fname
->base_name
));
479 nanosleep(&req
, NULL
);
480 retval
= SMB_VFS_NEXT_STAT(handle
, cache_smb_fname
);
484 /* still no cachefile, or still too old, return 0 */
486 || !timespec_is_newer(&smb_fname
->st
.st_ex_mtime
,
487 &cache_smb_fname
->st
.st_ex_mtime
)) {
488 DEBUG(SCANNEDONLY_DEBUG
,
489 ("retval=%d, return 0\n",retval
));
495 /*********************/
497 /*********************/
499 static SMB_STRUCT_DIR
*scannedonly_opendir(vfs_handle_struct
* handle
,
501 const char *mask
, uint32 attr
)
503 SMB_STRUCT_DIR
*DIRp
;
504 struct scannedonly_DIR
*sDIR
;
506 DIRp
= SMB_VFS_NEXT_OPENDIR(handle
, fname
, mask
, attr
);
511 sDIR
= TALLOC_P(NULL
, struct scannedonly_DIR
);
512 if (fname
[0] != '/') {
513 sDIR
->base
= construct_full_path(sDIR
,handle
, fname
, true);
515 sDIR
->base
= name_w_ending_slash(sDIR
, fname
);
517 DEBUG(SCANNEDONLY_DEBUG
,
518 ("scannedonly_opendir, fname=%s, base=%s\n",fname
,sDIR
->base
));
520 sDIR
->notify_loop_done
= 0;
521 return (SMB_STRUCT_DIR
*) sDIR
;
524 static SMB_STRUCT_DIRENT
*scannedonly_readdir(vfs_handle_struct
*handle
,
525 SMB_STRUCT_DIR
* dirp
,
526 SMB_STRUCT_STAT
*sbuf
)
528 SMB_STRUCT_DIRENT
*result
;
531 struct smb_filename
*smb_fname
;
534 SMB_STRUCT_DIRENT
*newdirent
;
535 TALLOC_CTX
*ctx
=talloc_tos();
537 struct scannedonly_DIR
*sDIR
= (struct scannedonly_DIR
*)dirp
;
542 result
= SMB_VFS_NEXT_READDIR(handle
, sDIR
->DIR, sbuf
);
547 if (is_scannedonly_file(STRUCTSCANO(handle
->data
), result
->d_name
)) {
548 DEBUG(SCANNEDONLY_DEBUG
,
549 ("scannedonly_readdir, %s is a scannedonly file, "
550 "skip to next entry\n", result
->d_name
));
551 return scannedonly_readdir(handle
, dirp
, NULL
);
553 tmp
= talloc_asprintf(ctx
, "%s%s", sDIR
->base
, result
->d_name
);
554 DEBUG(SCANNEDONLY_DEBUG
,
555 ("scannedonly_readdir, check access to %s (sbuf=%p)\n",
558 /* even if we don't hide nonscanned files or we allow non scanned
559 files we call allow_access because it will notify the daemon to
561 create_synthetic_smb_fname(ctx
, tmp
,NULL
,
562 sbuf
?VALID_STAT(*sbuf
)?sbuf
:NULL
:NULL
,
564 allowed
= scannedonly_allow_access(
565 handle
, sDIR
, smb_fname
,
568 STRUCTSCANO(handle
->data
)->hide_nonscanned_files
569 ? STRUCTSCANO(handle
->data
)->recheck_time_readdir
571 STRUCTSCANO(handle
->data
)->recheck_tries_readdir
,
574 DEBUG(SCANNEDONLY_DEBUG
,
575 ("scannedonly_readdir access to %s (%s) = %d\n", tmp
,
576 result
->d_name
, allowed
));
580 DEBUG(SCANNEDONLY_DEBUG
,
581 ("hide_nonscanned_files=%d, allow_nonscanned_files=%d\n",
582 STRUCTSCANO(handle
->data
)->hide_nonscanned_files
,
583 STRUCTSCANO(handle
->data
)->allow_nonscanned_files
586 if (!STRUCTSCANO(handle
->data
)->hide_nonscanned_files
587 || STRUCTSCANO(handle
->data
)->allow_nonscanned_files
) {
591 DEBUG(SCANNEDONLY_DEBUG
,
592 ("scannedonly_readdir, readdir listing for %s not "
593 "allowed, notify user\n", result
->d_name
));
594 notify_name
= talloc_asprintf(
595 ctx
,"%s %s",result
->d_name
,
596 STRUCTSCANO(handle
->data
)->scanning_message
);
597 namelen
= strlen(notify_name
);
598 newdirent
= (SMB_STRUCT_DIRENT
*)TALLOC_ARRAY(
599 ctx
, char, sizeof(SMB_STRUCT_DIRENT
) + namelen
+ 1);
603 memcpy(newdirent
, result
, sizeof(SMB_STRUCT_DIRENT
));
604 memcpy(&newdirent
->d_name
, notify_name
, namelen
+ 1);
605 DEBUG(SCANNEDONLY_DEBUG
,
606 ("scannedonly_readdir, return newdirent at %p with "
607 "notification %s\n", newdirent
, newdirent
->d_name
));
611 static void scannedonly_seekdir(struct vfs_handle_struct
*handle
,
612 SMB_STRUCT_DIR
* dirp
, long offset
)
614 struct scannedonly_DIR
*sDIR
= (struct scannedonly_DIR
*)dirp
;
615 SMB_VFS_NEXT_SEEKDIR(handle
, sDIR
->DIR, offset
);
618 static long scannedonly_telldir(struct vfs_handle_struct
*handle
,
619 SMB_STRUCT_DIR
* dirp
)
621 struct scannedonly_DIR
*sDIR
= (struct scannedonly_DIR
*)dirp
;
622 return SMB_VFS_NEXT_TELLDIR(handle
, sDIR
->DIR);
625 static void scannedonly_rewinddir(struct vfs_handle_struct
*handle
,
626 SMB_STRUCT_DIR
* dirp
)
628 struct scannedonly_DIR
*sDIR
= (struct scannedonly_DIR
*)dirp
;
629 SMB_VFS_NEXT_REWINDDIR(handle
, sDIR
->DIR);
632 static int scannedonly_closedir(vfs_handle_struct
* handle
,
633 SMB_STRUCT_DIR
* dirp
)
636 struct scannedonly_DIR
*sDIR
= (struct scannedonly_DIR
*)dirp
;
637 flush_sendbuffer(handle
);
638 retval
= SMB_VFS_NEXT_CLOSEDIR(handle
, sDIR
->DIR);
643 static int scannedonly_stat(vfs_handle_struct
* handle
,
644 struct smb_filename
*smb_fname
)
647 ret
= SMB_VFS_NEXT_STAT(handle
, smb_fname
);
648 DEBUG(SCANNEDONLY_DEBUG
, ("scannedonly_stat: %s returned %d\n",
649 smb_fname
->base_name
, ret
));
650 if (ret
!= 0 && errno
== ENOENT
) {
651 TALLOC_CTX
*ctx
=talloc_tos();
652 char *test_base_name
, *tmp_base_name
= smb_fname
->base_name
;
653 /* possibly this was a fake name (file is being scanned for
654 viruses.txt): check for that and create the real name and
655 stat the real name */
656 test_base_name
= real_path_from_notify_path(
658 STRUCTSCANO(handle
->data
),
659 smb_fname
->base_name
);
660 if (test_base_name
) {
661 smb_fname
->base_name
= test_base_name
;
662 ret
= SMB_VFS_NEXT_STAT(handle
, smb_fname
);
663 DEBUG(5, ("_stat: %s returned %d\n",
664 test_base_name
, ret
));
665 smb_fname
->base_name
= tmp_base_name
;
671 static int scannedonly_lstat(vfs_handle_struct
* handle
,
672 struct smb_filename
*smb_fname
)
675 ret
= SMB_VFS_NEXT_LSTAT(handle
, smb_fname
);
676 DEBUG(SCANNEDONLY_DEBUG
, ("scannedonly_lstat: %s returned %d\n",
677 smb_fname
->base_name
, ret
));
678 if (ret
!= 0 && errno
== ENOENT
) {
679 TALLOC_CTX
*ctx
=talloc_tos();
680 char *test_base_name
, *tmp_base_name
= smb_fname
->base_name
;
681 /* possibly this was a fake name (file is being scanned for
682 viruses.txt): check for that and create the real name and
683 stat the real name */
684 test_base_name
= real_path_from_notify_path(
685 ctx
, STRUCTSCANO(handle
->data
), smb_fname
->base_name
);
686 if (test_base_name
) {
687 smb_fname
->base_name
= test_base_name
;
688 ret
= SMB_VFS_NEXT_LSTAT(handle
, smb_fname
);
689 DEBUG(5, ("_lstat: %s returned %d\n",
690 test_base_name
, ret
));
691 smb_fname
->base_name
= tmp_base_name
;
697 static int scannedonly_open(vfs_handle_struct
* handle
,
698 struct smb_filename
*smb_fname
,
699 files_struct
* fsp
, int flags
, mode_t mode
)
702 char *tmp
, *shortname
;
703 int allowed
, write_access
= 0;
704 TALLOC_CTX
*ctx
=talloc_tos();
705 /* if open for writing ignore it */
706 if ((flags
& O_ACCMODE
) == O_WRONLY
) {
707 return SMB_VFS_NEXT_OPEN(handle
, smb_fname
, fsp
, flags
, mode
);
709 if ((flags
& O_ACCMODE
) == O_RDWR
) {
712 /* check if this file is scanned already */
713 tmp
= strrchr(smb_fname
->base_name
, '/');
715 base
= talloc_strndup(ctx
,smb_fname
->base_name
,
716 (tmp
- smb_fname
->base_name
) + 1);
720 shortname
= (char *)smb_fname
->base_name
;
722 allowed
= scannedonly_allow_access(
723 handle
, NULL
, smb_fname
, shortname
,
726 STRUCTSCANO(handle
->data
)->recheck_time_open
,
727 STRUCTSCANO(handle
->data
)->recheck_tries_open
,
728 STRUCTSCANO(handle
->data
)->recheck_size_open
,
730 flush_sendbuffer(handle
);
731 DEBUG(SCANNEDONLY_DEBUG
, ("scannedonly_open: allow=%d for %s\n",
732 allowed
, smb_fname
->base_name
));
734 || STRUCTSCANO(handle
->data
)->allow_nonscanned_files
) {
735 return SMB_VFS_NEXT_OPEN(handle
, smb_fname
, fsp
, flags
, mode
);
741 static int scannedonly_close(vfs_handle_struct
* handle
, files_struct
* fsp
)
743 /* we only have to notify the scanner
744 for files that were open readwrite or writable. */
745 if (fsp
->can_write
) {
746 TALLOC_CTX
*ctx
= talloc_tos();
747 notify_scanner(handle
, construct_full_path(
749 fsp
->fsp_name
->base_name
,false));
750 flush_sendbuffer(handle
);
752 return SMB_VFS_NEXT_CLOSE(handle
, fsp
);
755 static int scannedonly_rename(vfs_handle_struct
* handle
,
756 const struct smb_filename
*smb_fname_src
,
757 const struct smb_filename
*smb_fname_dst
)
759 /* rename the cache file before we pass the actual rename on */
760 struct smb_filename
*smb_fname_src_tmp
= NULL
;
761 struct smb_filename
*smb_fname_dst_tmp
= NULL
;
762 char *cachefile_src
, *cachefile_dst
;
763 TALLOC_CTX
*ctx
= talloc_tos();
765 /* Setup temporary smb_filename structs. */
766 cachefile_src
= cachefile_name_f_fullpath(
768 smb_fname_src
->base_name
,
769 STRUCTSCANO(handle
->data
)->p_scanned
);
770 cachefile_dst
= cachefile_name_f_fullpath(
772 smb_fname_dst
->base_name
,
773 STRUCTSCANO(handle
->data
)->p_scanned
);
775 create_synthetic_smb_fname(ctx
, cachefile_src
,NULL
,NULL
,
777 create_synthetic_smb_fname(ctx
, cachefile_dst
,NULL
,NULL
,
780 if (SMB_VFS_NEXT_RENAME(handle
, smb_fname_src_tmp
, smb_fname_dst_tmp
)
782 DEBUG(SCANNEDONLY_DEBUG
,
783 ("failed to rename %s into %s\n", cachefile_src
,
786 return SMB_VFS_NEXT_RENAME(handle
, smb_fname_src
, smb_fname_dst
);
789 static int scannedonly_unlink(vfs_handle_struct
* handle
,
790 const struct smb_filename
*smb_fname
)
792 /* unlink the 'scanned' file too */
793 struct smb_filename
*smb_fname_cache
= NULL
;
795 TALLOC_CTX
*ctx
= talloc_tos();
797 cachefile
= cachefile_name_f_fullpath(
799 smb_fname
->base_name
,
800 STRUCTSCANO(handle
->data
)->p_scanned
);
801 create_synthetic_smb_fname(ctx
, cachefile
,NULL
,NULL
,
803 if (SMB_VFS_NEXT_UNLINK(handle
, smb_fname_cache
) != 0) {
804 DEBUG(SCANNEDONLY_DEBUG
, ("_unlink: failed to unlink %s\n",
805 smb_fname_cache
->base_name
));
807 return SMB_VFS_NEXT_UNLINK(handle
, smb_fname
);
810 static int scannedonly_rmdir(vfs_handle_struct
* handle
, const char *path
)
812 /* if there are only .scanned: .virus: or .failed: files, we delete
813 those, because the client cannot see them */
815 SMB_STRUCT_DIRENT
*dire
;
816 TALLOC_CTX
*ctx
= talloc_tos();
817 bool only_deletable_files
= true, have_files
= false;
820 if (!STRUCTSCANO(handle
->data
)->rm_hidden_files_on_rmdir
)
821 return SMB_VFS_NEXT_RMDIR(handle
, path
);
823 path_w_slash
= name_w_ending_slash(ctx
,path
);
824 dirp
= SMB_VFS_NEXT_OPENDIR(handle
, path
, NULL
, 0);
825 while ((dire
= SMB_VFS_NEXT_READDIR(handle
, dirp
, NULL
)) != NULL
) {
826 if (ISDOT(dire
->d_name
) || ISDOTDOT(dire
->d_name
)) {
830 if (!is_scannedonly_file(STRUCTSCANO(handle
->data
),
832 struct smb_filename
*smb_fname
= NULL
;
836 if (STRUCTSCANO(handle
->data
)->show_special_files
) {
837 only_deletable_files
= false;
840 /* stat the file and see if it is a
842 fullpath
= talloc_asprintf(ctx
, "%s%s", path_w_slash
,
844 create_synthetic_smb_fname(ctx
, fullpath
,NULL
,NULL
,
846 retval
= SMB_VFS_NEXT_STAT(handle
, smb_fname
);
848 && S_ISREG(smb_fname
->st
.st_ex_mode
)) {
849 only_deletable_files
= false;
851 TALLOC_FREE(fullpath
);
852 TALLOC_FREE(smb_fname
);
856 DEBUG(SCANNEDONLY_DEBUG
,
857 ("path=%s, have_files=%d, only_deletable_files=%d\n",
858 path
, have_files
, only_deletable_files
));
859 if (have_files
&& only_deletable_files
) {
860 DEBUG(SCANNEDONLY_DEBUG
,
861 ("scannedonly_rmdir, remove leftover scannedonly "
862 "files from %s\n", path_w_slash
));
863 SMB_VFS_NEXT_REWINDDIR(handle
, dirp
);
864 while ((dire
= SMB_VFS_NEXT_READDIR(handle
, dirp
, NULL
))
867 struct smb_filename
*smb_fname
= NULL
;
868 if (ISDOT(dire
->d_name
) || ISDOTDOT(dire
->d_name
)) {
871 fullpath
= talloc_asprintf(ctx
, "%s%s", path_w_slash
,
873 create_synthetic_smb_fname(ctx
, fullpath
,NULL
,NULL
,
875 DEBUG(SCANNEDONLY_DEBUG
, ("unlink %s\n", fullpath
));
876 SMB_VFS_NEXT_UNLINK(handle
, smb_fname
);
877 TALLOC_FREE(fullpath
);
878 TALLOC_FREE(smb_fname
);
881 return SMB_VFS_NEXT_CLOSEDIR(handle
, dirp
);
884 static void free_scannedonly_data(void **data
)
889 static int scannedonly_connect(struct vfs_handle_struct
*handle
,
890 const char *service
, const char *user
)
893 struct Tscannedonly
*so
;
895 so
= SMB_MALLOC_P(struct Tscannedonly
);
896 handle
->data
= (void *)so
;
897 handle
->free_data
= free_scannedonly_data
;
898 so
->gsendbuffer
[0]='\0';
900 lp_parm_bool(SNUM(handle
->conn
), "scannedonly",
901 "domain_socket", True
);
903 (char *)lp_parm_const_string(SNUM(handle
->conn
),
904 "scannedonly", "socketname",
905 "/var/lib/scannedonly/scan");
907 lp_parm_int(SNUM(handle
->conn
), "scannedonly", "portnum",
910 (char *)lp_parm_const_string(SNUM(handle
->conn
),
911 "scannedonly", "scanhost",
914 so
->show_special_files
=
915 lp_parm_bool(SNUM(handle
->conn
), "scannedonly",
916 "show_special_files", True
);
917 so
->rm_hidden_files_on_rmdir
=
918 lp_parm_bool(SNUM(handle
->conn
), "scannedonly",
919 "rm_hidden_files_on_rmdir", True
);
920 so
->hide_nonscanned_files
=
921 lp_parm_bool(SNUM(handle
->conn
), "scannedonly",
922 "hide_nonscanned_files", False
);
923 so
->allow_nonscanned_files
=
924 lp_parm_bool(SNUM(handle
->conn
), "scannedonly",
925 "allow_nonscanned_files", False
);
926 so
->scanning_message
=
927 (char *)lp_parm_const_string(SNUM(handle
->conn
),
930 "is being scanned for viruses");
931 so
->scanning_message_len
= strlen(so
->scanning_message
);
932 so
->recheck_time_open
=
933 lp_parm_int(SNUM(handle
->conn
), "scannedonly",
934 "recheck_time_open", 50);
935 so
->recheck_tries_open
=
936 lp_parm_int(SNUM(handle
->conn
), "scannedonly",
937 "recheck_tries_open", 100);
938 so
->recheck_size_open
=
939 lp_parm_int(SNUM(handle
->conn
), "scannedonly",
940 "recheck_size_open", 100);
941 so
->recheck_time_readdir
=
942 lp_parm_int(SNUM(handle
->conn
), "scannedonly",
943 "recheck_time_readdir", 50);
944 so
->recheck_tries_readdir
=
945 lp_parm_int(SNUM(handle
->conn
), "scannedonly",
946 "recheck_tries_readdir", 20);
949 (char *)lp_parm_const_string(SNUM(handle
->conn
),
954 (char *)lp_parm_const_string(SNUM(handle
->conn
),
959 (char *)lp_parm_const_string(SNUM(handle
->conn
),
963 connect_to_scanner(handle
);
965 return SMB_VFS_NEXT_CONNECT(handle
, service
, user
);
968 /* VFS operations structure */
969 static struct vfs_fn_pointers vfs_scannedonly_fns
= {
970 .opendir
= scannedonly_opendir
,
971 .readdir
= scannedonly_readdir
,
972 .seekdir
= scannedonly_seekdir
,
973 .telldir
= scannedonly_telldir
,
974 .rewind_dir
= scannedonly_rewinddir
,
975 .closedir
= scannedonly_closedir
,
976 .rmdir
= scannedonly_rmdir
,
977 .stat
= scannedonly_stat
,
978 .lstat
= scannedonly_lstat
,
979 .open
= scannedonly_open
,
980 .close_fn
= scannedonly_close
,
981 .rename
= scannedonly_rename
,
982 .unlink
= scannedonly_unlink
,
983 .connect_fn
= scannedonly_connect
986 NTSTATUS
vfs_scannedonly_init(void)
988 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION
, "scannedonly",
989 &vfs_scannedonly_fns
);