source: vendor/current/source3/modules/vfs_cap.c

Last change on this file was 988, checked in by Silvan Scherrer, 9 years ago

Samba Server: update vendor to version 4.4.3
File size: 16.4 KB
Line 
1/*
2 * CAP VFS module for Samba 3.x Version 0.3
3 *
4 * Copyright (C) Tim Potter, 1999-2000
5 * Copyright (C) Alexander Bokovoy, 2002-2003
6 * Copyright (C) Stefan (metze) Metzmacher, 2003
7 * Copyright (C) TAKAHASHI Motonobu (monyo), 2003
8 * Copyright (C) Jeremy Allison, 2007
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 3 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, see <http://www.gnu.org/licenses/>.
22 */
23
24
25#include "includes.h"
26#include "smbd/smbd.h"
27
28/* cap functions */
29static char *capencode(TALLOC_CTX *ctx, const char *from);
30static char *capdecode(TALLOC_CTX *ctx, const char *from);
31
32static uint64_t cap_disk_free(vfs_handle_struct *handle, const char *path,
33 uint64_t *bsize, uint64_t *dfree, uint64_t *dsize)
34{
35 char *cappath = capencode(talloc_tos(), path);
36
37 if (!cappath) {
38 errno = ENOMEM;
39 return (uint64_t)-1;
40 }
41 return SMB_VFS_NEXT_DISK_FREE(handle, cappath, bsize, dfree, dsize);
42}
43
44static int cap_get_quota(vfs_handle_struct *handle, const char *path,
45 enum SMB_QUOTA_TYPE qtype, unid_t id,
46 SMB_DISK_QUOTA *dq)
47{
48 char *cappath = capencode(talloc_tos(), path);
49
50 if (!cappath) {
51 errno = ENOMEM;
52 return -1;
53 }
54 return SMB_VFS_NEXT_GET_QUOTA(handle, cappath, qtype, id, dq);
55}
56
57static DIR *cap_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32_t attr)
58{
59 char *capname = capencode(talloc_tos(), fname);
60
61 if (!capname) {
62 errno = ENOMEM;
63 return NULL;
64 }
65 return SMB_VFS_NEXT_OPENDIR(handle, capname, mask, attr);
66}
67
68static struct dirent *cap_readdir(vfs_handle_struct *handle,
69 DIR *dirp,
70 SMB_STRUCT_STAT *sbuf)
71{
72 struct dirent *result;
73 struct dirent *newdirent;
74 char *newname;
75 size_t newnamelen;
76 DEBUG(3,("cap: cap_readdir\n"));
77
78 result = SMB_VFS_NEXT_READDIR(handle, dirp, NULL);
79 if (!result) {
80 return NULL;
81 }
82
83 newname = capdecode(talloc_tos(), result->d_name);
84 if (!newname) {
85 return NULL;
86 }
87 DEBUG(3,("cap: cap_readdir: %s\n", newname));
88 newnamelen = strlen(newname)+1;
89 newdirent = talloc_size(
90 talloc_tos(), sizeof(struct dirent) + newnamelen);
91 if (!newdirent) {
92 return NULL;
93 }
94 talloc_set_name_const(newdirent, "struct dirent");
95 memcpy(newdirent, result, sizeof(struct dirent));
96 memcpy(&newdirent->d_name, newname, newnamelen);
97 return newdirent;
98}
99
100static int cap_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
101{
102 char *cappath = capencode(talloc_tos(), path);
103
104 if (!cappath) {
105 errno = ENOMEM;
106 return -1;
107 }
108 return SMB_VFS_NEXT_MKDIR(handle, cappath, mode);
109}
110
111static int cap_rmdir(vfs_handle_struct *handle, const char *path)
112{
113 char *cappath = capencode(talloc_tos(), path);
114
115 if (!cappath) {
116 errno = ENOMEM;
117 return -1;
118 }
119 return SMB_VFS_NEXT_RMDIR(handle, cappath);
120}
121
122static int cap_open(vfs_handle_struct *handle, struct smb_filename *smb_fname,
123 files_struct *fsp, int flags, mode_t mode)
124{
125 char *cappath;
126 char *tmp_base_name = NULL;
127 int ret;
128
129 cappath = capencode(talloc_tos(), smb_fname->base_name);
130
131 if (!cappath) {
132 errno = ENOMEM;
133 return -1;
134 }
135
136 tmp_base_name = smb_fname->base_name;
137 smb_fname->base_name = cappath;
138
139 DEBUG(3,("cap: cap_open for %s\n", smb_fname_str_dbg(smb_fname)));
140 ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
141
142 smb_fname->base_name = tmp_base_name;
143 TALLOC_FREE(cappath);
144
145 return ret;
146}
147
148static int cap_rename(vfs_handle_struct *handle,
149 const struct smb_filename *smb_fname_src,
150 const struct smb_filename *smb_fname_dst)
151{
152 char *capold = NULL;
153 char *capnew = NULL;
154 struct smb_filename *smb_fname_src_tmp = NULL;
155 struct smb_filename *smb_fname_dst_tmp = NULL;
156 int ret = -1;
157
158 capold = capencode(talloc_tos(), smb_fname_src->base_name);
159 capnew = capencode(talloc_tos(), smb_fname_dst->base_name);
160 if (!capold || !capnew) {
161 errno = ENOMEM;
162 goto out;
163 }
164
165 /* Setup temporary smb_filename structs. */
166 smb_fname_src_tmp = cp_smb_filename(talloc_tos(), smb_fname_src);
167 if (smb_fname_src_tmp == NULL) {
168 errno = ENOMEM;
169 goto out;
170 }
171 smb_fname_dst_tmp = cp_smb_filename(talloc_tos(), smb_fname_dst);
172 if (smb_fname_dst_tmp == NULL) {
173 errno = ENOMEM;
174 goto out;
175 }
176
177 smb_fname_src_tmp->base_name = capold;
178 smb_fname_dst_tmp->base_name = capnew;
179
180 ret = SMB_VFS_NEXT_RENAME(handle, smb_fname_src_tmp,
181 smb_fname_dst_tmp);
182 out:
183 TALLOC_FREE(capold);
184 TALLOC_FREE(capnew);
185 TALLOC_FREE(smb_fname_src_tmp);
186 TALLOC_FREE(smb_fname_dst_tmp);
187
188 return ret;
189}
190
191static int cap_stat(vfs_handle_struct *handle, struct smb_filename *smb_fname)
192{
193 char *cappath;
194 char *tmp_base_name = NULL;
195 int ret;
196
197 cappath = capencode(talloc_tos(), smb_fname->base_name);
198
199 if (!cappath) {
200 errno = ENOMEM;
201 return -1;
202 }
203
204 tmp_base_name = smb_fname->base_name;
205 smb_fname->base_name = cappath;
206
207 ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
208
209 smb_fname->base_name = tmp_base_name;
210 TALLOC_FREE(cappath);
211
212 return ret;
213}
214
215static int cap_lstat(vfs_handle_struct *handle, struct smb_filename *smb_fname)
216{
217 char *cappath;
218 char *tmp_base_name = NULL;
219 int ret;
220
221 cappath = capencode(talloc_tos(), smb_fname->base_name);
222
223 if (!cappath) {
224 errno = ENOMEM;
225 return -1;
226 }
227
228 tmp_base_name = smb_fname->base_name;
229 smb_fname->base_name = cappath;
230
231 ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
232
233 smb_fname->base_name = tmp_base_name;
234 TALLOC_FREE(cappath);
235
236 return ret;
237}
238
239static int cap_unlink(vfs_handle_struct *handle,
240 const struct smb_filename *smb_fname)
241{
242 struct smb_filename *smb_fname_tmp = NULL;
243 char *cappath = NULL;
244 int ret;
245
246 cappath = capencode(talloc_tos(), smb_fname->base_name);
247 if (!cappath) {
248 errno = ENOMEM;
249 return -1;
250 }
251
252 /* Setup temporary smb_filename structs. */
253 smb_fname_tmp = cp_smb_filename(talloc_tos(), smb_fname);
254 if (smb_fname_tmp == NULL) {
255 errno = ENOMEM;
256 return -1;
257 }
258
259 smb_fname_tmp->base_name = cappath;
260
261 ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_tmp);
262
263 TALLOC_FREE(smb_fname_tmp);
264 return ret;
265}
266
267static int cap_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
268{
269 char *cappath = capencode(talloc_tos(), path);
270
271 if (!cappath) {
272 errno = ENOMEM;
273 return -1;
274 }
275 return SMB_VFS_NEXT_CHMOD(handle, cappath, mode);
276}
277
278static int cap_chown(vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid)
279{
280 char *cappath = capencode(talloc_tos(), path);
281
282 if (!cappath) {
283 errno = ENOMEM;
284 return -1;
285 }
286 return SMB_VFS_NEXT_CHOWN(handle, cappath, uid, gid);
287}
288
289static int cap_lchown(vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid)
290{
291 char *cappath = capencode(talloc_tos(), path);
292
293 if (!cappath) {
294 errno = ENOMEM;
295 return -1;
296 }
297 return SMB_VFS_NEXT_LCHOWN(handle, cappath, uid, gid);
298}
299
300static int cap_chdir(vfs_handle_struct *handle, const char *path)
301{
302 char *cappath = capencode(talloc_tos(), path);
303
304 if (!cappath) {
305 errno = ENOMEM;
306 return -1;
307 }
308 DEBUG(3,("cap: cap_chdir for %s\n", path));
309 return SMB_VFS_NEXT_CHDIR(handle, cappath);
310}
311
312static int cap_ntimes(vfs_handle_struct *handle,
313 const struct smb_filename *smb_fname,
314 struct smb_file_time *ft)
315{
316 struct smb_filename *smb_fname_tmp = NULL;
317 char *cappath = NULL;
318 int ret;
319
320 cappath = capencode(talloc_tos(), smb_fname->base_name);
321
322 if (!cappath) {
323 errno = ENOMEM;
324 return -1;
325 }
326
327 /* Setup temporary smb_filename structs. */
328 smb_fname_tmp = cp_smb_filename(talloc_tos(), smb_fname);
329 if (smb_fname_tmp == NULL) {
330 errno = ENOMEM;
331 return -1;
332 }
333
334 smb_fname_tmp->base_name = cappath;
335
336 ret = SMB_VFS_NEXT_NTIMES(handle, smb_fname_tmp, ft);
337
338 TALLOC_FREE(smb_fname_tmp);
339 return ret;
340}
341
342
343static int cap_symlink(vfs_handle_struct *handle, const char *oldpath,
344 const char *newpath)
345{
346 char *capold = capencode(talloc_tos(), oldpath);
347 char *capnew = capencode(talloc_tos(), newpath);
348
349 if (!capold || !capnew) {
350 errno = ENOMEM;
351 return -1;
352 }
353 return SMB_VFS_NEXT_SYMLINK(handle, capold, capnew);
354}
355
356static int cap_readlink(vfs_handle_struct *handle, const char *path,
357 char *buf, size_t bufsiz)
358{
359 char *cappath = capencode(talloc_tos(), path);
360
361 if (!cappath) {
362 errno = ENOMEM;
363 return -1;
364 }
365 return SMB_VFS_NEXT_READLINK(handle, cappath, buf, bufsiz);
366}
367
368static int cap_link(vfs_handle_struct *handle, const char *oldpath, const char *newpath)
369{
370 char *capold = capencode(talloc_tos(), oldpath);
371 char *capnew = capencode(talloc_tos(), newpath);
372
373 if (!capold || !capnew) {
374 errno = ENOMEM;
375 return -1;
376 }
377 return SMB_VFS_NEXT_LINK(handle, capold, capnew);
378}
379
380static int cap_mknod(vfs_handle_struct *handle, const char *path, mode_t mode, SMB_DEV_T dev)
381{
382 char *cappath = capencode(talloc_tos(), path);
383
384 if (!cappath) {
385 errno = ENOMEM;
386 return -1;
387 }
388 return SMB_VFS_NEXT_MKNOD(handle, cappath, mode, dev);
389}
390
391static char *cap_realpath(vfs_handle_struct *handle, const char *path)
392{
393 /* monyo need capencode'ed and capdecode'ed? */
394 char *cappath = capencode(talloc_tos(), path);
395
396 if (!cappath) {
397 errno = ENOMEM;
398 return NULL;
399 }
400 return SMB_VFS_NEXT_REALPATH(handle, cappath);
401}
402
403static int cap_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
404{
405 char *cappath = capencode(talloc_tos(), path);
406
407 /* If the underlying VFS doesn't have ACL support... */
408 if (!cappath) {
409 errno = ENOMEM;
410 return -1;
411 }
412 return SMB_VFS_NEXT_CHMOD_ACL(handle, cappath, mode);
413}
414
415static SMB_ACL_T cap_sys_acl_get_file(vfs_handle_struct *handle,
416 const char *path, SMB_ACL_TYPE_T type,
417 TALLOC_CTX *mem_ctx)
418{
419 char *cappath = capencode(talloc_tos(), path);
420
421 if (!cappath) {
422 errno = ENOMEM;
423 return (SMB_ACL_T)NULL;
424 }
425 return SMB_VFS_NEXT_SYS_ACL_GET_FILE(handle, cappath, type, mem_ctx);
426}
427
428static int cap_sys_acl_set_file(vfs_handle_struct *handle, const char *path, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
429{
430 char *cappath = capencode(talloc_tos(), path);
431
432 if (!cappath) {
433 errno = ENOMEM;
434 return -1;
435 }
436 return SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle, cappath, acltype, theacl);
437}
438
439static int cap_sys_acl_delete_def_file(vfs_handle_struct *handle, const char *path)
440{
441 char *cappath = capencode(talloc_tos(), path);
442
443 if (!cappath) {
444 errno = ENOMEM;
445 return -1;
446 }
447 return SMB_VFS_NEXT_SYS_ACL_DELETE_DEF_FILE(handle, cappath);
448}
449
450static ssize_t cap_getxattr(vfs_handle_struct *handle, const char *path, const char *name, void *value, size_t size)
451{
452 char *cappath = capencode(talloc_tos(), path);
453 char *capname = capencode(talloc_tos(), name);
454
455 if (!cappath || !capname) {
456 errno = ENOMEM;
457 return -1;
458 }
459 return SMB_VFS_NEXT_GETXATTR(handle, cappath, capname, value, size);
460}
461
462static ssize_t cap_fgetxattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path, void *value, size_t size)
463{
464 char *cappath = capencode(talloc_tos(), path);
465
466 if (!cappath) {
467 errno = ENOMEM;
468 return -1;
469 }
470 return SMB_VFS_NEXT_FGETXATTR(handle, fsp, cappath, value, size);
471}
472
473static ssize_t cap_listxattr(vfs_handle_struct *handle, const char *path, char *list, size_t size)
474{
475 char *cappath = capencode(talloc_tos(), path);
476
477 if (!cappath) {
478 errno = ENOMEM;
479 return -1;
480 }
481 return SMB_VFS_NEXT_LISTXATTR(handle, cappath, list, size);
482}
483
484static int cap_removexattr(vfs_handle_struct *handle, const char *path, const char *name)
485{
486 char *cappath = capencode(talloc_tos(), path);
487 char *capname = capencode(talloc_tos(), name);
488
489 if (!cappath || !capname) {
490 errno = ENOMEM;
491 return -1;
492 }
493 return SMB_VFS_NEXT_REMOVEXATTR(handle, cappath, capname);
494}
495
496static int cap_fremovexattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path)
497{
498 char *cappath = capencode(talloc_tos(), path);
499
500 if (!cappath) {
501 errno = ENOMEM;
502 return -1;
503 }
504 return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, cappath);
505}
506
507static int cap_setxattr(vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags)
508{
509 char *cappath = capencode(talloc_tos(), path);
510 char *capname = capencode(talloc_tos(), name);
511
512 if (!cappath || !capname) {
513 errno = ENOMEM;
514 return -1;
515 }
516 return SMB_VFS_NEXT_SETXATTR(handle, cappath, capname, value, size, flags);
517}
518
519static int cap_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path, const void *value, size_t size, int flags)
520{
521 char *cappath = capencode(talloc_tos(), path);
522
523 if (!cappath) {
524 errno = ENOMEM;
525 return -1;
526 }
527 return SMB_VFS_NEXT_FSETXATTR(handle, fsp, cappath, value, size, flags);
528}
529
530static struct vfs_fn_pointers vfs_cap_fns = {
531 .disk_free_fn = cap_disk_free,
532 .get_quota_fn = cap_get_quota,
533 .opendir_fn = cap_opendir,
534 .readdir_fn = cap_readdir,
535 .mkdir_fn = cap_mkdir,
536 .rmdir_fn = cap_rmdir,
537 .open_fn = cap_open,
538 .rename_fn = cap_rename,
539 .stat_fn = cap_stat,
540 .lstat_fn = cap_lstat,
541 .unlink_fn = cap_unlink,
542 .chmod_fn = cap_chmod,
543 .chown_fn = cap_chown,
544 .lchown_fn = cap_lchown,
545 .chdir_fn = cap_chdir,
546 .ntimes_fn = cap_ntimes,
547 .symlink_fn = cap_symlink,
548 .readlink_fn = cap_readlink,
549 .link_fn = cap_link,
550 .mknod_fn = cap_mknod,
551 .realpath_fn = cap_realpath,
552 .chmod_acl_fn = cap_chmod_acl,
553 .sys_acl_get_file_fn = cap_sys_acl_get_file,
554 .sys_acl_set_file_fn = cap_sys_acl_set_file,
555 .sys_acl_delete_def_file_fn = cap_sys_acl_delete_def_file,
556 .getxattr_fn = cap_getxattr,
557 .fgetxattr_fn = cap_fgetxattr,
558 .listxattr_fn = cap_listxattr,
559 .removexattr_fn = cap_removexattr,
560 .fremovexattr_fn = cap_fremovexattr,
561 .setxattr_fn = cap_setxattr,
562 .fsetxattr_fn = cap_fsetxattr
563};
564
565NTSTATUS vfs_cap_init(void);
566NTSTATUS vfs_cap_init(void)
567{
568 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "cap",
569 &vfs_cap_fns);
570}
571
572/* For CAP functions */
573#define hex_tag ':'
574#define hex2bin(c) hex2bin_table[(unsigned char)(c)]
575#define bin2hex(c) bin2hex_table[(unsigned char)(c)]
576#define is_hex(s) ((s)[0] == hex_tag)
577
578static unsigned char hex2bin_table[256] = {
5790, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00 */
5800, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10 */
5810, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20 */
5820, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, /* 0x30 */
5830000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x40 */
5840000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
5850, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x50 */
5860000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x60 */
5870000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
5880, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70 */
5890, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x80 */
5900, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x90 */
5910, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa0 */
5920, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xb0 */
5930, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xc0 */
5940, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xd0 */
5950, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xe0 */
5960, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* 0xf0 */
597};
598static unsigned char bin2hex_table[256] = "0123456789abcdef";
599
600/*******************************************************************
601 original code -> ":xx" - CAP format
602********************************************************************/
603
604static char *capencode(TALLOC_CTX *ctx, const char *from)
605{
606 char *out = NULL;
607 const char *p1;
608 char *to = NULL;
609 size_t len = 0;
610
611 for (p1 = from; *p1; p1++) {
612 if ((unsigned char)*p1 >= 0x80) {
613 len += 3;
614 } else {
615 len++;
616 }
617 }
618 len++;
619
620 to = talloc_array(ctx, char, len);
621 if (!to) {
622 return NULL;
623 }
624
625 for (out = to; *from;) {
626 /* buffer husoku error */
627 if ((unsigned char)*from >= 0x80) {
628 *out++ = hex_tag;
629 *out++ = bin2hex (((*from)>>4)&0x0f);
630 *out++ = bin2hex ((*from)&0x0f);
631 from++;
632 } else {
633 *out++ = *from++;
634 }
635 }
636 *out = '\0';
637 return to;
638}
639
640/*******************************************************************
641 CAP -> original code
642********************************************************************/
643/* ":xx" -> a byte */
644
645static char *capdecode(TALLOC_CTX *ctx, const char *from)
646{
647 const char *p1;
648 char *out = NULL;
649 char *to = NULL;
650 size_t len = 0;
651
652 for (p1 = from; *p1; len++) {
653 if (is_hex(p1)) {
654 p1 += 3;
655 } else {
656 p1++;
657 }
658 }
659 len++;
660
661 to = talloc_array(ctx, char, len);
662 if (!to) {
663 return NULL;
664 }
665
666 for (out = to; *from;) {
667 if (is_hex(from)) {
668 *out++ = (hex2bin(from[1])<<4) | (hex2bin(from[2]));
669 from += 3;
670 } else {
671 *out++ = *from++;
672 }
673 }
674 *out = '\0';
675 return to;
676}
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