1/*-
2 * Copyright (c) 1999, 2000, 2001 Robert N. M. Watson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
| 1/*-
2 * Copyright (c) 1999, 2000, 2001 Robert N. M. Watson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
|
26 * $FreeBSD: head/sys/kern/vfs_acl.c 83366 2001-09-12 08:38:13Z julian $
| 26 * $FreeBSD: head/sys/kern/vfs_acl.c 85582 2001-10-27 05:45:42Z rwatson $
|
27 */
28/*
29 * Developed by the TrustedBSD Project.
30 * Support for POSIX.1e access control lists.
31 */
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/sysproto.h>
36#include <sys/kernel.h>
37#include <sys/malloc.h>
38#include <sys/vnode.h>
39#include <sys/lock.h>
40#include <sys/mutex.h>
41#include <sys/namei.h>
42#include <sys/file.h>
43#include <sys/proc.h>
44#include <sys/sysent.h>
45#include <sys/errno.h>
46#include <sys/stat.h>
47#include <sys/acl.h>
48
49MALLOC_DEFINE(M_ACL, "acl", "access control list");
50
| 27 */
28/*
29 * Developed by the TrustedBSD Project.
30 * Support for POSIX.1e access control lists.
31 */
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/sysproto.h>
36#include <sys/kernel.h>
37#include <sys/malloc.h>
38#include <sys/vnode.h>
39#include <sys/lock.h>
40#include <sys/mutex.h>
41#include <sys/namei.h>
42#include <sys/file.h>
43#include <sys/proc.h>
44#include <sys/sysent.h>
45#include <sys/errno.h>
46#include <sys/stat.h>
47#include <sys/acl.h>
48
49MALLOC_DEFINE(M_ACL, "acl", "access control list");
50
|
51static int vacl_set_acl( struct thread *td, struct vnode *vp, acl_type_t type,
| 51static int vacl_set_acl(struct thread *td, struct vnode *vp, acl_type_t type,
|
52 struct acl *aclp);
| 52 struct acl *aclp);
|
53static int vacl_get_acl( struct thread *td, struct vnode *vp, acl_type_t type,
| 53static int vacl_get_acl(struct thread *td, struct vnode *vp, acl_type_t type,
|
54 struct acl *aclp);
| 54 struct acl *aclp);
|
55static int vacl_aclcheck( struct thread *td, struct vnode *vp,
| 55static int vacl_aclcheck(struct thread *td, struct vnode *vp,
|
56 acl_type_t type, struct acl *aclp);
57
58/*
59 * Implement a version of vaccess() that understands POSIX.1e ACL semantics.
60 * Return 0 on success, else an errno value. Should be merged into
61 * vaccess() eventually.
62 */
63int
64vaccess_acl_posix1e(enum vtype type, uid_t file_uid, gid_t file_gid,
65 struct acl *acl, mode_t acc_mode, struct ucred *cred, int *privused)
66{
67 struct acl_entry *acl_other, *acl_mask;
68 mode_t dac_granted;
69 mode_t cap_granted;
70 mode_t acl_mask_granted;
71 int group_matched, i;
72
73 /*
74 * Look for a normal, non-privileged way to access the file/directory
75 * as requested. If it exists, go with that. Otherwise, attempt
76 * to use privileges granted via cap_granted. In some cases,
77 * which privileges to use may be ambiguous due to "best match",
78 * in which case fall back on first match for the time being.
79 */
80 if (privused != NULL)
81 *privused = 0;
82
83 /*
84 * Determine privileges now, but don't apply until we've found
85 * a DAC entry that matches but has failed to allow access.
86 */
87#ifndef CAPABILITIES
88 if (suser_xxx(cred, NULL, PRISON_ROOT) == 0)
89 cap_granted = (VEXEC | VREAD | VWRITE | VADMIN);
90 else
91 cap_granted = 0;
92#else
93 cap_granted = 0;
94
95 if (type == VDIR) {
96 if ((acc_mode & VEXEC) && !cap_check(cred, NULL,
97 CAP_DAC_READ_SEARCH, PRISON_ROOT))
98 cap_granted |= VEXEC;
99 } else {
100 if ((acc_mode & VEXEC) && !cap_check(cred, NULL,
101 CAP_DAC_EXECUTE, PRISON_ROOT))
102 cap_granted |= VEXEC;
103 }
104
105 if ((acc_mode & VREAD) && !cap_check(cred, NULL, CAP_DAC_READ_SEARCH,
106 PRISON_ROOT))
107 cap_granted |= VREAD;
108
109 if ((acc_mode & VWRITE) && !cap_check(cred, NULL, CAP_DAC_WRITE,
110 PRISON_ROOT))
111 cap_granted |= VWRITE;
112
113 if ((acc_mode & VADMIN) && !cap_check(cred, NULL, CAP_FOWNER,
114 PRISON_ROOT))
115 cap_granted |= VADMIN;
116#endif /* CAPABILITIES */
117
118 /*
119 * The owner matches if the effective uid associated with the
120 * credential matches that of the ACL_USER_OBJ entry. While we're
121 * doing the first scan, also cache the location of the ACL_MASK
122 * and ACL_OTHER entries, preventing some future iterations.
123 */
124 acl_mask = acl_other = NULL;
125 for (i = 0; i < acl->acl_cnt; i++) {
126 switch (acl->acl_entry[i].ae_tag) {
127 case ACL_USER_OBJ:
128 if (file_uid != cred->cr_uid)
129 break;
130 dac_granted = 0;
131 dac_granted |= VADMIN;
132 if (acl->acl_entry[i].ae_perm & ACL_EXECUTE)
133 dac_granted |= VEXEC;
134 if (acl->acl_entry[i].ae_perm & ACL_READ)
135 dac_granted |= VREAD;
136 if (acl->acl_entry[i].ae_perm & ACL_WRITE)
137 dac_granted |= VWRITE;
138 if ((acc_mode & dac_granted) == acc_mode)
139 return (0);
140 if ((acc_mode & (dac_granted | cap_granted)) ==
141 acc_mode) {
142 if (privused != NULL)
143 *privused = 1;
144 return (0);
145 }
146 goto error;
147
148 case ACL_MASK:
149 acl_mask = &acl->acl_entry[i];
150 break;
151
152 case ACL_OTHER:
153 acl_other = &acl->acl_entry[i];
154 break;
155
156 default:
157 }
158 }
159
160 /*
161 * An ACL_OTHER entry should always exist in a valid access
162 * ACL. If it doesn't, then generate a serious failure. For now,
163 * this means a debugging message and EPERM, but in the future
164 * should probably be a panic.
165 */
166 if (acl_other == NULL) {
167 /*
168 * XXX This should never happen
169 */
170 printf("vaccess_acl_posix1e: ACL_OTHER missing\n");
171 return (EPERM);
172 }
173
174 /*
175 * Checks against ACL_USER, ACL_GROUP_OBJ, and ACL_GROUP fields
176 * are masked by an ACL_MASK entry, if any. As such, first identify
177 * the ACL_MASK field, then iterate through identifying potential
178 * user matches, then group matches. If there is no ACL_MASK,
179 * assume that the mask allows all requests to succeed.
180 */
181 if (acl_mask != NULL) {
182 acl_mask_granted = 0;
183 if (acl_mask->ae_perm & ACL_EXECUTE)
184 acl_mask_granted |= VEXEC;
185 if (acl_mask->ae_perm & ACL_READ)
186 acl_mask_granted |= VREAD;
187 if (acl_mask->ae_perm & ACL_WRITE)
188 acl_mask_granted |= VWRITE;
189 } else
190 acl_mask_granted = VEXEC | VREAD | VWRITE;
191
192 /*
193 * Iterate through user ACL entries. Do checks twice, first
194 * without privilege, and then if a match is found but failed,
195 * a second time with privilege.
196 */
197
198 /*
199 * Check ACL_USER ACL entries.
200 */
201 for (i = 0; i < acl->acl_cnt; i++) {
202 switch (acl->acl_entry[i].ae_tag) {
203 case ACL_USER:
204 if (acl->acl_entry[i].ae_id != cred->cr_uid)
205 break;
206 dac_granted = 0;
207 if (acl->acl_entry[i].ae_perm & ACL_EXECUTE)
208 dac_granted |= VEXEC;
209 if (acl->acl_entry[i].ae_perm & ACL_READ)
210 dac_granted |= VREAD;
211 if (acl->acl_entry[i].ae_perm & ACL_WRITE)
212 dac_granted |= VWRITE;
213 dac_granted &= acl_mask_granted;
214 if ((acc_mode & dac_granted) == acc_mode)
215 return (0);
216 if ((acc_mode & (dac_granted | cap_granted)) !=
217 acc_mode)
218 goto error;
219
220 if (privused != NULL)
221 *privused = 1;
222 return (0);
223 }
224 }
225
226 /*
227 * Group match is best-match, not first-match, so find a
228 * "best" match. Iterate across, testing each potential group
229 * match. Make sure we keep track of whether we found a match
230 * or not, so that we know if we should try again with any
231 * available privilege, or if we should move on to ACL_OTHER.
232 */
233 group_matched = 0;
234 for (i = 0; i < acl->acl_cnt; i++) {
235 switch (acl->acl_entry[i].ae_tag) {
236 case ACL_GROUP_OBJ:
237 if (!groupmember(file_gid, cred))
238 break;
239 dac_granted = 0;
240 if (acl->acl_entry[i].ae_perm & ACL_EXECUTE)
241 dac_granted |= VEXEC;
242 if (acl->acl_entry[i].ae_perm & ACL_READ)
243 dac_granted |= VREAD;
244 if (acl->acl_entry[i].ae_perm & ACL_WRITE)
245 dac_granted |= VWRITE;
246 dac_granted &= acl_mask_granted;
247
248 if ((acc_mode & dac_granted) == acc_mode)
249 return (0);
250
251 group_matched = 1;
252 break;
253
254 case ACL_GROUP:
255 if (!groupmember(acl->acl_entry[i].ae_id, cred))
256 break;
257 dac_granted = 0;
258 if (acl->acl_entry[i].ae_perm & ACL_EXECUTE)
259 dac_granted |= VEXEC;
260 if (acl->acl_entry[i].ae_perm & ACL_READ)
261 dac_granted |= VREAD;
262 if (acl->acl_entry[i].ae_perm & ACL_WRITE)
263 dac_granted |= VWRITE;
264 dac_granted &= acl_mask_granted;
265
266 if ((acc_mode & dac_granted) == acc_mode)
267 return (0);
268
269 group_matched = 1;
270 break;
271
272 default:
273 }
274 }
275
276 if (group_matched == 1) {
277 /*
278 * There was a match, but it did not grant rights via
279 * pure DAC. Try again, this time with privilege.
280 */
281 for (i = 0; i < acl->acl_cnt; i++) {
282 switch (acl->acl_entry[i].ae_tag) {
283 case ACL_GROUP_OBJ:
284 if (!groupmember(file_gid, cred))
285 break;
286 dac_granted = 0;
287 if (acl->acl_entry[i].ae_perm & ACL_EXECUTE)
288 dac_granted |= VEXEC;
289 if (acl->acl_entry[i].ae_perm & ACL_READ)
290 dac_granted |= VREAD;
291 if (acl->acl_entry[i].ae_perm & ACL_WRITE)
292 dac_granted |= VWRITE;
293 dac_granted &= acl_mask_granted;
294
295 if ((acc_mode & (dac_granted | cap_granted)) !=
296 acc_mode)
297 break;
298
299 if (privused != NULL)
300 *privused = 1;
301 return (0);
302
303 case ACL_GROUP:
304 if (!groupmember(acl->acl_entry[i].ae_id,
305 cred))
306 break;
307 dac_granted = 0;
308 if (acl->acl_entry[i].ae_perm & ACL_EXECUTE)
309 dac_granted |= VEXEC;
310 if (acl->acl_entry[i].ae_perm & ACL_READ)
311 dac_granted |= VREAD;
312 if (acl->acl_entry[i].ae_perm & ACL_WRITE)
313 dac_granted |= VWRITE;
314 dac_granted &= acl_mask_granted;
315
316 if ((acc_mode & (dac_granted | cap_granted)) !=
317 acc_mode)
318 break;
319
320 if (privused != NULL)
321 *privused = 1;
322 return (0);
323
324 default:
325 }
326 }
327 /*
328 * Even with privilege, group membership was not sufficient.
329 * Return failure.
330 */
331 goto error;
332 }
333
334 /*
335 * Fall back on ACL_OTHER. ACL_MASK is not applied to ACL_OTHER.
336 */
337 dac_granted = 0;
338 if (acl_other->ae_perm & ACL_EXECUTE)
339 dac_granted |= VEXEC;
340 if (acl_other->ae_perm & ACL_READ)
341 dac_granted |= VREAD;
342 if (acl_other->ae_perm & ACL_WRITE)
343 dac_granted |= VWRITE;
344
345 if ((acc_mode & dac_granted) == acc_mode)
346 return (0);
347 if ((acc_mode & (dac_granted | cap_granted)) == acc_mode) {
348 if (privused != NULL)
349 *privused = 1;
350 return (0);
351 }
352
353error:
354 return ((acc_mode & VADMIN) ? EPERM : EACCES);
355}
356
357/*
358 * For the purposes of file systems maintaining the _OBJ entries in an
359 * inode with a mode_t field, this routine converts a mode_t entry
360 * to an acl_perm_t.
361 */
362acl_perm_t
363acl_posix1e_mode_to_perm(acl_tag_t tag, mode_t mode)
364{
365 acl_perm_t perm = 0;
366
367 switch(tag) {
368 case ACL_USER_OBJ:
369 if (mode & S_IXUSR)
370 perm |= ACL_EXECUTE;
371 if (mode & S_IRUSR)
372 perm |= ACL_READ;
373 if (mode & S_IWUSR)
374 perm |= ACL_WRITE;
375 return (perm);
376
377 case ACL_GROUP_OBJ:
378 if (mode & S_IXGRP)
379 perm |= ACL_EXECUTE;
380 if (mode & S_IRGRP)
381 perm |= ACL_READ;
382 if (mode & S_IWGRP)
383 perm |= ACL_WRITE;
384 return (perm);
385
386 case ACL_OTHER:
387 if (mode & S_IXOTH)
388 perm |= ACL_EXECUTE;
389 if (mode & S_IROTH)
390 perm |= ACL_READ;
391 if (mode & S_IWOTH)
392 perm |= ACL_WRITE;
393 return (perm);
394
395 default:
396 printf("acl_posix1e_mode_to_perm: invalid tag (%d)\n", tag);
397 return (0);
398 }
399}
400
401/*
402 * Given inode information (uid, gid, mode), return an acl entry of the
403 * appropriate type.
404 */
405struct acl_entry
406acl_posix1e_mode_to_entry(acl_tag_t tag, uid_t uid, gid_t gid, mode_t mode)
407{
408 struct acl_entry acl_entry;
409
410 acl_entry.ae_tag = tag;
411 acl_entry.ae_perm = acl_posix1e_mode_to_perm(tag, mode);
412 switch(tag) {
413 case ACL_USER_OBJ:
414 acl_entry.ae_id = uid;
415 break;
416
417 case ACL_GROUP_OBJ:
418 acl_entry.ae_id = gid;
419 break;
420
421 case ACL_OTHER:
422 acl_entry.ae_id = ACL_UNDEFINED_ID;
423 break;
424
425 default:
426 acl_entry.ae_id = ACL_UNDEFINED_ID;
427 printf("acl_posix1e_mode_to_entry: invalid tag (%d)\n", tag);
428 }
429
430 return (acl_entry);
431}
432
433/*
434 * Utility function to generate a file mode given appropriate ACL entries.
435 */
436mode_t
437acl_posix1e_perms_to_mode(struct acl_entry *acl_user_obj_entry,
438 struct acl_entry *acl_group_obj_entry, struct acl_entry *acl_other_entry)
439{
440 mode_t mode;
441
442 mode = 0;
443 if (acl_user_obj_entry->ae_perm & ACL_EXECUTE)
444 mode |= S_IXUSR;
445 if (acl_user_obj_entry->ae_perm & ACL_READ)
446 mode |= S_IRUSR;
447 if (acl_user_obj_entry->ae_perm & ACL_WRITE)
448 mode |= S_IWUSR;
449 if (acl_group_obj_entry->ae_perm & ACL_EXECUTE)
450 mode |= S_IXGRP;
451 if (acl_group_obj_entry->ae_perm & ACL_READ)
452 mode |= S_IRGRP;
453 if (acl_group_obj_entry->ae_perm & ACL_WRITE)
454 mode |= S_IWGRP;
455 if (acl_other_entry->ae_perm & ACL_EXECUTE)
456 mode |= S_IXOTH;
457 if (acl_other_entry->ae_perm & ACL_READ)
458 mode |= S_IROTH;
459 if (acl_other_entry->ae_perm & ACL_WRITE)
460 mode |= S_IWOTH;
461
462 return (mode);
463}
464
465/*
466 * Perform a syntactic check of the ACL, sufficient to allow an
467 * implementing file system to determine if it should accept this and
468 * rely on the POSIX.1e ACL properties.
469 */
470int
471acl_posix1e_check(struct acl *acl)
472{
473 int num_acl_user_obj, num_acl_user, num_acl_group_obj, num_acl_group;
474 int num_acl_mask, num_acl_other, i;
475
476 /*
477 * Verify that the number of entries does not exceed the maximum
478 * defined for acl_t.
479 * Verify that the correct number of various sorts of ae_tags are
480 * present:
481 * Exactly one ACL_USER_OBJ
482 * Exactly one ACL_GROUP_OBJ
483 * Exactly one ACL_OTHER
484 * If any ACL_USER or ACL_GROUP entries appear, then exactly one
485 * ACL_MASK entry must also appear.
486 * Verify that all ae_perm entries are in ACL_PERM_BITS.
487 * Verify all ae_tag entries are understood by this implementation.
488 * Note: Does not check for uniqueness of qualifier (ae_id) field.
489 */
490 num_acl_user_obj = num_acl_user = num_acl_group_obj = num_acl_group =
491 num_acl_mask = num_acl_other = 0;
492 if (acl->acl_cnt > ACL_MAX_ENTRIES || acl->acl_cnt < 0)
493 return (EINVAL);
494 for (i = 0; i < acl->acl_cnt; i++) {
495 /*
496 * Check for a valid tag.
497 */
498 switch(acl->acl_entry[i].ae_tag) {
499 case ACL_USER_OBJ:
500 acl->acl_entry[i].ae_id = ACL_UNDEFINED_ID; /* XXX */
501 if (acl->acl_entry[i].ae_id != ACL_UNDEFINED_ID)
502 return (EINVAL);
503 num_acl_user_obj++;
504 break;
505 case ACL_GROUP_OBJ:
506 acl->acl_entry[i].ae_id = ACL_UNDEFINED_ID; /* XXX */
507 if (acl->acl_entry[i].ae_id != ACL_UNDEFINED_ID)
508 return (EINVAL);
509 num_acl_group_obj++;
510 break;
511 case ACL_USER:
512 if (acl->acl_entry[i].ae_id == ACL_UNDEFINED_ID)
513 return (EINVAL);
514 num_acl_user++;
515 break;
516 case ACL_GROUP:
517 if (acl->acl_entry[i].ae_id == ACL_UNDEFINED_ID)
518 return (EINVAL);
519 num_acl_group++;
520 break;
521 case ACL_OTHER:
522 acl->acl_entry[i].ae_id = ACL_UNDEFINED_ID; /* XXX */
523 if (acl->acl_entry[i].ae_id != ACL_UNDEFINED_ID)
524 return (EINVAL);
525 num_acl_other++;
526 break;
527 case ACL_MASK:
528 acl->acl_entry[i].ae_id = ACL_UNDEFINED_ID; /* XXX */
529 if (acl->acl_entry[i].ae_id != ACL_UNDEFINED_ID)
530 return (EINVAL);
531 num_acl_mask++;
532 break;
533 default:
534 return (EINVAL);
535 }
536 /*
537 * Check for valid perm entries.
538 */
539 if ((acl->acl_entry[i].ae_perm | ACL_PERM_BITS) !=
540 ACL_PERM_BITS)
541 return (EINVAL);
542 }
543 if ((num_acl_user_obj != 1) || (num_acl_group_obj != 1) ||
544 (num_acl_other != 1) || (num_acl_mask != 0 && num_acl_mask != 1))
545 return (EINVAL);
546 if (((num_acl_group != 0) || (num_acl_user != 0)) &&
547 (num_acl_mask != 1))
548 return (EINVAL);
549 return (0);
550}
551
552/*
553 * These calls wrap the real vnode operations, and are called by the
554 * syscall code once the syscall has converted the path or file
555 * descriptor to a vnode (unlocked). The aclp pointer is assumed
556 * still to point to userland, so this should not be consumed within
557 * the kernel except by syscall code. Other code should directly
558 * invoke VOP_{SET,GET}ACL.
559 */
560
561/*
562 * Given a vnode, set its ACL.
563 */
564static int
| 56 acl_type_t type, struct acl *aclp);
57
58/*
59 * Implement a version of vaccess() that understands POSIX.1e ACL semantics.
60 * Return 0 on success, else an errno value. Should be merged into
61 * vaccess() eventually.
62 */
63int
64vaccess_acl_posix1e(enum vtype type, uid_t file_uid, gid_t file_gid,
65 struct acl *acl, mode_t acc_mode, struct ucred *cred, int *privused)
66{
67 struct acl_entry *acl_other, *acl_mask;
68 mode_t dac_granted;
69 mode_t cap_granted;
70 mode_t acl_mask_granted;
71 int group_matched, i;
72
73 /*
74 * Look for a normal, non-privileged way to access the file/directory
75 * as requested. If it exists, go with that. Otherwise, attempt
76 * to use privileges granted via cap_granted. In some cases,
77 * which privileges to use may be ambiguous due to "best match",
78 * in which case fall back on first match for the time being.
79 */
80 if (privused != NULL)
81 *privused = 0;
82
83 /*
84 * Determine privileges now, but don't apply until we've found
85 * a DAC entry that matches but has failed to allow access.
86 */
87#ifndef CAPABILITIES
88 if (suser_xxx(cred, NULL, PRISON_ROOT) == 0)
89 cap_granted = (VEXEC | VREAD | VWRITE | VADMIN);
90 else
91 cap_granted = 0;
92#else
93 cap_granted = 0;
94
95 if (type == VDIR) {
96 if ((acc_mode & VEXEC) && !cap_check(cred, NULL,
97 CAP_DAC_READ_SEARCH, PRISON_ROOT))
98 cap_granted |= VEXEC;
99 } else {
100 if ((acc_mode & VEXEC) && !cap_check(cred, NULL,
101 CAP_DAC_EXECUTE, PRISON_ROOT))
102 cap_granted |= VEXEC;
103 }
104
105 if ((acc_mode & VREAD) && !cap_check(cred, NULL, CAP_DAC_READ_SEARCH,
106 PRISON_ROOT))
107 cap_granted |= VREAD;
108
109 if ((acc_mode & VWRITE) && !cap_check(cred, NULL, CAP_DAC_WRITE,
110 PRISON_ROOT))
111 cap_granted |= VWRITE;
112
113 if ((acc_mode & VADMIN) && !cap_check(cred, NULL, CAP_FOWNER,
114 PRISON_ROOT))
115 cap_granted |= VADMIN;
116#endif /* CAPABILITIES */
117
118 /*
119 * The owner matches if the effective uid associated with the
120 * credential matches that of the ACL_USER_OBJ entry. While we're
121 * doing the first scan, also cache the location of the ACL_MASK
122 * and ACL_OTHER entries, preventing some future iterations.
123 */
124 acl_mask = acl_other = NULL;
125 for (i = 0; i < acl->acl_cnt; i++) {
126 switch (acl->acl_entry[i].ae_tag) {
127 case ACL_USER_OBJ:
128 if (file_uid != cred->cr_uid)
129 break;
130 dac_granted = 0;
131 dac_granted |= VADMIN;
132 if (acl->acl_entry[i].ae_perm & ACL_EXECUTE)
133 dac_granted |= VEXEC;
134 if (acl->acl_entry[i].ae_perm & ACL_READ)
135 dac_granted |= VREAD;
136 if (acl->acl_entry[i].ae_perm & ACL_WRITE)
137 dac_granted |= VWRITE;
138 if ((acc_mode & dac_granted) == acc_mode)
139 return (0);
140 if ((acc_mode & (dac_granted | cap_granted)) ==
141 acc_mode) {
142 if (privused != NULL)
143 *privused = 1;
144 return (0);
145 }
146 goto error;
147
148 case ACL_MASK:
149 acl_mask = &acl->acl_entry[i];
150 break;
151
152 case ACL_OTHER:
153 acl_other = &acl->acl_entry[i];
154 break;
155
156 default:
157 }
158 }
159
160 /*
161 * An ACL_OTHER entry should always exist in a valid access
162 * ACL. If it doesn't, then generate a serious failure. For now,
163 * this means a debugging message and EPERM, but in the future
164 * should probably be a panic.
165 */
166 if (acl_other == NULL) {
167 /*
168 * XXX This should never happen
169 */
170 printf("vaccess_acl_posix1e: ACL_OTHER missing\n");
171 return (EPERM);
172 }
173
174 /*
175 * Checks against ACL_USER, ACL_GROUP_OBJ, and ACL_GROUP fields
176 * are masked by an ACL_MASK entry, if any. As such, first identify
177 * the ACL_MASK field, then iterate through identifying potential
178 * user matches, then group matches. If there is no ACL_MASK,
179 * assume that the mask allows all requests to succeed.
180 */
181 if (acl_mask != NULL) {
182 acl_mask_granted = 0;
183 if (acl_mask->ae_perm & ACL_EXECUTE)
184 acl_mask_granted |= VEXEC;
185 if (acl_mask->ae_perm & ACL_READ)
186 acl_mask_granted |= VREAD;
187 if (acl_mask->ae_perm & ACL_WRITE)
188 acl_mask_granted |= VWRITE;
189 } else
190 acl_mask_granted = VEXEC | VREAD | VWRITE;
191
192 /*
193 * Iterate through user ACL entries. Do checks twice, first
194 * without privilege, and then if a match is found but failed,
195 * a second time with privilege.
196 */
197
198 /*
199 * Check ACL_USER ACL entries.
200 */
201 for (i = 0; i < acl->acl_cnt; i++) {
202 switch (acl->acl_entry[i].ae_tag) {
203 case ACL_USER:
204 if (acl->acl_entry[i].ae_id != cred->cr_uid)
205 break;
206 dac_granted = 0;
207 if (acl->acl_entry[i].ae_perm & ACL_EXECUTE)
208 dac_granted |= VEXEC;
209 if (acl->acl_entry[i].ae_perm & ACL_READ)
210 dac_granted |= VREAD;
211 if (acl->acl_entry[i].ae_perm & ACL_WRITE)
212 dac_granted |= VWRITE;
213 dac_granted &= acl_mask_granted;
214 if ((acc_mode & dac_granted) == acc_mode)
215 return (0);
216 if ((acc_mode & (dac_granted | cap_granted)) !=
217 acc_mode)
218 goto error;
219
220 if (privused != NULL)
221 *privused = 1;
222 return (0);
223 }
224 }
225
226 /*
227 * Group match is best-match, not first-match, so find a
228 * "best" match. Iterate across, testing each potential group
229 * match. Make sure we keep track of whether we found a match
230 * or not, so that we know if we should try again with any
231 * available privilege, or if we should move on to ACL_OTHER.
232 */
233 group_matched = 0;
234 for (i = 0; i < acl->acl_cnt; i++) {
235 switch (acl->acl_entry[i].ae_tag) {
236 case ACL_GROUP_OBJ:
237 if (!groupmember(file_gid, cred))
238 break;
239 dac_granted = 0;
240 if (acl->acl_entry[i].ae_perm & ACL_EXECUTE)
241 dac_granted |= VEXEC;
242 if (acl->acl_entry[i].ae_perm & ACL_READ)
243 dac_granted |= VREAD;
244 if (acl->acl_entry[i].ae_perm & ACL_WRITE)
245 dac_granted |= VWRITE;
246 dac_granted &= acl_mask_granted;
247
248 if ((acc_mode & dac_granted) == acc_mode)
249 return (0);
250
251 group_matched = 1;
252 break;
253
254 case ACL_GROUP:
255 if (!groupmember(acl->acl_entry[i].ae_id, cred))
256 break;
257 dac_granted = 0;
258 if (acl->acl_entry[i].ae_perm & ACL_EXECUTE)
259 dac_granted |= VEXEC;
260 if (acl->acl_entry[i].ae_perm & ACL_READ)
261 dac_granted |= VREAD;
262 if (acl->acl_entry[i].ae_perm & ACL_WRITE)
263 dac_granted |= VWRITE;
264 dac_granted &= acl_mask_granted;
265
266 if ((acc_mode & dac_granted) == acc_mode)
267 return (0);
268
269 group_matched = 1;
270 break;
271
272 default:
273 }
274 }
275
276 if (group_matched == 1) {
277 /*
278 * There was a match, but it did not grant rights via
279 * pure DAC. Try again, this time with privilege.
280 */
281 for (i = 0; i < acl->acl_cnt; i++) {
282 switch (acl->acl_entry[i].ae_tag) {
283 case ACL_GROUP_OBJ:
284 if (!groupmember(file_gid, cred))
285 break;
286 dac_granted = 0;
287 if (acl->acl_entry[i].ae_perm & ACL_EXECUTE)
288 dac_granted |= VEXEC;
289 if (acl->acl_entry[i].ae_perm & ACL_READ)
290 dac_granted |= VREAD;
291 if (acl->acl_entry[i].ae_perm & ACL_WRITE)
292 dac_granted |= VWRITE;
293 dac_granted &= acl_mask_granted;
294
295 if ((acc_mode & (dac_granted | cap_granted)) !=
296 acc_mode)
297 break;
298
299 if (privused != NULL)
300 *privused = 1;
301 return (0);
302
303 case ACL_GROUP:
304 if (!groupmember(acl->acl_entry[i].ae_id,
305 cred))
306 break;
307 dac_granted = 0;
308 if (acl->acl_entry[i].ae_perm & ACL_EXECUTE)
309 dac_granted |= VEXEC;
310 if (acl->acl_entry[i].ae_perm & ACL_READ)
311 dac_granted |= VREAD;
312 if (acl->acl_entry[i].ae_perm & ACL_WRITE)
313 dac_granted |= VWRITE;
314 dac_granted &= acl_mask_granted;
315
316 if ((acc_mode & (dac_granted | cap_granted)) !=
317 acc_mode)
318 break;
319
320 if (privused != NULL)
321 *privused = 1;
322 return (0);
323
324 default:
325 }
326 }
327 /*
328 * Even with privilege, group membership was not sufficient.
329 * Return failure.
330 */
331 goto error;
332 }
333
334 /*
335 * Fall back on ACL_OTHER. ACL_MASK is not applied to ACL_OTHER.
336 */
337 dac_granted = 0;
338 if (acl_other->ae_perm & ACL_EXECUTE)
339 dac_granted |= VEXEC;
340 if (acl_other->ae_perm & ACL_READ)
341 dac_granted |= VREAD;
342 if (acl_other->ae_perm & ACL_WRITE)
343 dac_granted |= VWRITE;
344
345 if ((acc_mode & dac_granted) == acc_mode)
346 return (0);
347 if ((acc_mode & (dac_granted | cap_granted)) == acc_mode) {
348 if (privused != NULL)
349 *privused = 1;
350 return (0);
351 }
352
353error:
354 return ((acc_mode & VADMIN) ? EPERM : EACCES);
355}
356
357/*
358 * For the purposes of file systems maintaining the _OBJ entries in an
359 * inode with a mode_t field, this routine converts a mode_t entry
360 * to an acl_perm_t.
361 */
362acl_perm_t
363acl_posix1e_mode_to_perm(acl_tag_t tag, mode_t mode)
364{
365 acl_perm_t perm = 0;
366
367 switch(tag) {
368 case ACL_USER_OBJ:
369 if (mode & S_IXUSR)
370 perm |= ACL_EXECUTE;
371 if (mode & S_IRUSR)
372 perm |= ACL_READ;
373 if (mode & S_IWUSR)
374 perm |= ACL_WRITE;
375 return (perm);
376
377 case ACL_GROUP_OBJ:
378 if (mode & S_IXGRP)
379 perm |= ACL_EXECUTE;
380 if (mode & S_IRGRP)
381 perm |= ACL_READ;
382 if (mode & S_IWGRP)
383 perm |= ACL_WRITE;
384 return (perm);
385
386 case ACL_OTHER:
387 if (mode & S_IXOTH)
388 perm |= ACL_EXECUTE;
389 if (mode & S_IROTH)
390 perm |= ACL_READ;
391 if (mode & S_IWOTH)
392 perm |= ACL_WRITE;
393 return (perm);
394
395 default:
396 printf("acl_posix1e_mode_to_perm: invalid tag (%d)\n", tag);
397 return (0);
398 }
399}
400
401/*
402 * Given inode information (uid, gid, mode), return an acl entry of the
403 * appropriate type.
404 */
405struct acl_entry
406acl_posix1e_mode_to_entry(acl_tag_t tag, uid_t uid, gid_t gid, mode_t mode)
407{
408 struct acl_entry acl_entry;
409
410 acl_entry.ae_tag = tag;
411 acl_entry.ae_perm = acl_posix1e_mode_to_perm(tag, mode);
412 switch(tag) {
413 case ACL_USER_OBJ:
414 acl_entry.ae_id = uid;
415 break;
416
417 case ACL_GROUP_OBJ:
418 acl_entry.ae_id = gid;
419 break;
420
421 case ACL_OTHER:
422 acl_entry.ae_id = ACL_UNDEFINED_ID;
423 break;
424
425 default:
426 acl_entry.ae_id = ACL_UNDEFINED_ID;
427 printf("acl_posix1e_mode_to_entry: invalid tag (%d)\n", tag);
428 }
429
430 return (acl_entry);
431}
432
433/*
434 * Utility function to generate a file mode given appropriate ACL entries.
435 */
436mode_t
437acl_posix1e_perms_to_mode(struct acl_entry *acl_user_obj_entry,
438 struct acl_entry *acl_group_obj_entry, struct acl_entry *acl_other_entry)
439{
440 mode_t mode;
441
442 mode = 0;
443 if (acl_user_obj_entry->ae_perm & ACL_EXECUTE)
444 mode |= S_IXUSR;
445 if (acl_user_obj_entry->ae_perm & ACL_READ)
446 mode |= S_IRUSR;
447 if (acl_user_obj_entry->ae_perm & ACL_WRITE)
448 mode |= S_IWUSR;
449 if (acl_group_obj_entry->ae_perm & ACL_EXECUTE)
450 mode |= S_IXGRP;
451 if (acl_group_obj_entry->ae_perm & ACL_READ)
452 mode |= S_IRGRP;
453 if (acl_group_obj_entry->ae_perm & ACL_WRITE)
454 mode |= S_IWGRP;
455 if (acl_other_entry->ae_perm & ACL_EXECUTE)
456 mode |= S_IXOTH;
457 if (acl_other_entry->ae_perm & ACL_READ)
458 mode |= S_IROTH;
459 if (acl_other_entry->ae_perm & ACL_WRITE)
460 mode |= S_IWOTH;
461
462 return (mode);
463}
464
465/*
466 * Perform a syntactic check of the ACL, sufficient to allow an
467 * implementing file system to determine if it should accept this and
468 * rely on the POSIX.1e ACL properties.
469 */
470int
471acl_posix1e_check(struct acl *acl)
472{
473 int num_acl_user_obj, num_acl_user, num_acl_group_obj, num_acl_group;
474 int num_acl_mask, num_acl_other, i;
475
476 /*
477 * Verify that the number of entries does not exceed the maximum
478 * defined for acl_t.
479 * Verify that the correct number of various sorts of ae_tags are
480 * present:
481 * Exactly one ACL_USER_OBJ
482 * Exactly one ACL_GROUP_OBJ
483 * Exactly one ACL_OTHER
484 * If any ACL_USER or ACL_GROUP entries appear, then exactly one
485 * ACL_MASK entry must also appear.
486 * Verify that all ae_perm entries are in ACL_PERM_BITS.
487 * Verify all ae_tag entries are understood by this implementation.
488 * Note: Does not check for uniqueness of qualifier (ae_id) field.
489 */
490 num_acl_user_obj = num_acl_user = num_acl_group_obj = num_acl_group =
491 num_acl_mask = num_acl_other = 0;
492 if (acl->acl_cnt > ACL_MAX_ENTRIES || acl->acl_cnt < 0)
493 return (EINVAL);
494 for (i = 0; i < acl->acl_cnt; i++) {
495 /*
496 * Check for a valid tag.
497 */
498 switch(acl->acl_entry[i].ae_tag) {
499 case ACL_USER_OBJ:
500 acl->acl_entry[i].ae_id = ACL_UNDEFINED_ID; /* XXX */
501 if (acl->acl_entry[i].ae_id != ACL_UNDEFINED_ID)
502 return (EINVAL);
503 num_acl_user_obj++;
504 break;
505 case ACL_GROUP_OBJ:
506 acl->acl_entry[i].ae_id = ACL_UNDEFINED_ID; /* XXX */
507 if (acl->acl_entry[i].ae_id != ACL_UNDEFINED_ID)
508 return (EINVAL);
509 num_acl_group_obj++;
510 break;
511 case ACL_USER:
512 if (acl->acl_entry[i].ae_id == ACL_UNDEFINED_ID)
513 return (EINVAL);
514 num_acl_user++;
515 break;
516 case ACL_GROUP:
517 if (acl->acl_entry[i].ae_id == ACL_UNDEFINED_ID)
518 return (EINVAL);
519 num_acl_group++;
520 break;
521 case ACL_OTHER:
522 acl->acl_entry[i].ae_id = ACL_UNDEFINED_ID; /* XXX */
523 if (acl->acl_entry[i].ae_id != ACL_UNDEFINED_ID)
524 return (EINVAL);
525 num_acl_other++;
526 break;
527 case ACL_MASK:
528 acl->acl_entry[i].ae_id = ACL_UNDEFINED_ID; /* XXX */
529 if (acl->acl_entry[i].ae_id != ACL_UNDEFINED_ID)
530 return (EINVAL);
531 num_acl_mask++;
532 break;
533 default:
534 return (EINVAL);
535 }
536 /*
537 * Check for valid perm entries.
538 */
539 if ((acl->acl_entry[i].ae_perm | ACL_PERM_BITS) !=
540 ACL_PERM_BITS)
541 return (EINVAL);
542 }
543 if ((num_acl_user_obj != 1) || (num_acl_group_obj != 1) ||
544 (num_acl_other != 1) || (num_acl_mask != 0 && num_acl_mask != 1))
545 return (EINVAL);
546 if (((num_acl_group != 0) || (num_acl_user != 0)) &&
547 (num_acl_mask != 1))
548 return (EINVAL);
549 return (0);
550}
551
552/*
553 * These calls wrap the real vnode operations, and are called by the
554 * syscall code once the syscall has converted the path or file
555 * descriptor to a vnode (unlocked). The aclp pointer is assumed
556 * still to point to userland, so this should not be consumed within
557 * the kernel except by syscall code. Other code should directly
558 * invoke VOP_{SET,GET}ACL.
559 */
560
561/*
562 * Given a vnode, set its ACL.
563 */
564static int
|
565vacl_set_acl( struct thread *td, struct vnode *vp, acl_type_t type,
| 565vacl_set_acl(struct thread *td, struct vnode *vp, acl_type_t type,
|
566 struct acl *aclp)
567{
568 struct acl inkernacl;
569 int error;
570
571 error = copyin(aclp, &inkernacl, sizeof(struct acl));
572 if (error)
573 return(error);
574 VOP_LEASE(vp, td, td->td_proc->p_ucred, LEASE_WRITE);
575 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
576 error = VOP_SETACL(vp, type, &inkernacl, td->td_proc->p_ucred, td);
577 VOP_UNLOCK(vp, 0, td);
578 return(error);
579}
580
581/*
582 * Given a vnode, get its ACL.
583 */
584static int
| 566 struct acl *aclp)
567{
568 struct acl inkernacl;
569 int error;
570
571 error = copyin(aclp, &inkernacl, sizeof(struct acl));
572 if (error)
573 return(error);
574 VOP_LEASE(vp, td, td->td_proc->p_ucred, LEASE_WRITE);
575 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
576 error = VOP_SETACL(vp, type, &inkernacl, td->td_proc->p_ucred, td);
577 VOP_UNLOCK(vp, 0, td);
578 return(error);
579}
580
581/*
582 * Given a vnode, get its ACL.
583 */
584static int
|
585vacl_get_acl( struct thread *td, struct vnode *vp, acl_type_t type,
| 585vacl_get_acl(struct thread *td, struct vnode *vp, acl_type_t type,
|
586 struct acl *aclp)
587{
588 struct acl inkernelacl;
589 int error;
590
591 VOP_LEASE(vp, td, td->td_proc->p_ucred, LEASE_WRITE);
592 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
593 error = VOP_GETACL(vp, type, &inkernelacl, td->td_proc->p_ucred, td);
594 VOP_UNLOCK(vp, 0, td);
595 if (error == 0)
596 error = copyout(&inkernelacl, aclp, sizeof(struct acl));
597 return (error);
598}
599
600/*
601 * Given a vnode, delete its ACL.
602 */
603static int
| 586 struct acl *aclp)
587{
588 struct acl inkernelacl;
589 int error;
590
591 VOP_LEASE(vp, td, td->td_proc->p_ucred, LEASE_WRITE);
592 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
593 error = VOP_GETACL(vp, type, &inkernelacl, td->td_proc->p_ucred, td);
594 VOP_UNLOCK(vp, 0, td);
595 if (error == 0)
596 error = copyout(&inkernelacl, aclp, sizeof(struct acl));
597 return (error);
598}
599
600/*
601 * Given a vnode, delete its ACL.
602 */
603static int
|
604vacl_delete( struct thread *td, struct vnode *vp, acl_type_t type)
| 604vacl_delete(struct thread *td, struct vnode *vp, acl_type_t type)
|
605{
606 int error;
607
608 VOP_LEASE(vp, td, td->td_proc->p_ucred, LEASE_WRITE);
609 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
| 605{
606 int error;
607
608 VOP_LEASE(vp, td, td->td_proc->p_ucred, LEASE_WRITE);
609 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
610 error = VOP_SETACL(vp, ACL_TYPE_DEFAULT, 0, td->td_proc->p_ucred, td);
| 610 error = VOP_SETACL(vp, ACL_TYPE_DEFAULT, 0, td->td_proc->p_ucred,
611 td);
|
611 VOP_UNLOCK(vp, 0, td);
612 return (error);
613}
614
615/*
616 * Given a vnode, check whether an ACL is appropriate for it
617 */
618static int
| 612 VOP_UNLOCK(vp, 0, td);
613 return (error);
614}
615
616/*
617 * Given a vnode, check whether an ACL is appropriate for it
618 */
619static int
|
619vacl_aclcheck( struct thread *td, struct vnode *vp, acl_type_t type,
| 620vacl_aclcheck(struct thread *td, struct vnode *vp, acl_type_t type,
|
620 struct acl *aclp)
621{
622 struct acl inkernelacl;
623 int error;
624
625 error = copyin(aclp, &inkernelacl, sizeof(struct acl));
626 if (error)
627 return(error);
| 621 struct acl *aclp)
622{
623 struct acl inkernelacl;
624 int error;
625
626 error = copyin(aclp, &inkernelacl, sizeof(struct acl));
627 if (error)
628 return(error);
|
628 error = VOP_ACLCHECK(vp, type, &inkernelacl, td->td_proc->p_ucred, td);
| 629 error = VOP_ACLCHECK(vp, type, &inkernelacl, td->td_proc->p_ucred,
630 td);
|
629 return (error);
630}
631
632/*
633 * syscalls -- convert the path/fd to a vnode, and call vacl_whatever.
634 * Don't need to lock, as the vacl_ code will get/release any locks
635 * required.
636 */
637
638/*
639 * Given a file path, get an ACL for it
640 *
641 * MPSAFE
642 */
643int
| 631 return (error);
632}
633
634/*
635 * syscalls -- convert the path/fd to a vnode, and call vacl_whatever.
636 * Don't need to lock, as the vacl_ code will get/release any locks
637 * required.
638 */
639
640/*
641 * Given a file path, get an ACL for it
642 *
643 * MPSAFE
644 */
645int
|
644__acl_get_file( struct thread *td, struct __acl_get_file_args *uap)
| 646__acl_get_file(struct thread *td, struct __acl_get_file_args *uap)
|
645{
646 struct nameidata nd;
647 int error;
648
649 mtx_lock(&Giant);
| 647{
648 struct nameidata nd;
649 int error;
650
651 mtx_lock(&Giant);
|
650 /* what flags are required here -- possible not LOCKLEAF? */
| |
651 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
652 error = namei(&nd);
653 if (error == 0) {
654 error = vacl_get_acl(td, nd.ni_vp, SCARG(uap, type),
655 SCARG(uap, aclp));
656 NDFREE(&nd, 0);
657 }
658 mtx_unlock(&Giant);
659 return (error);
660}
661
662/*
663 * Given a file path, set an ACL for it
664 *
665 * MPSAFE
666 */
667int
| 652 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
653 error = namei(&nd);
654 if (error == 0) {
655 error = vacl_get_acl(td, nd.ni_vp, SCARG(uap, type),
656 SCARG(uap, aclp));
657 NDFREE(&nd, 0);
658 }
659 mtx_unlock(&Giant);
660 return (error);
661}
662
663/*
664 * Given a file path, set an ACL for it
665 *
666 * MPSAFE
667 */
668int
|
668__acl_set_file( struct thread *td, struct __acl_set_file_args *uap)
| 669__acl_set_file(struct thread *td, struct __acl_set_file_args *uap)
|
669{
670 struct nameidata nd;
671 int error;
672
673 mtx_lock(&Giant);
674 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
675 error = namei(&nd);
676 if (error == 0) {
677 error = vacl_set_acl(td, nd.ni_vp, SCARG(uap, type),
678 SCARG(uap, aclp));
679 NDFREE(&nd, 0);
680 }
681 mtx_unlock(&Giant);
682 return (error);
683}
684
685/*
686 * Given a file descriptor, get an ACL for it
687 *
688 * MPSAFE
689 */
690int
| 670{
671 struct nameidata nd;
672 int error;
673
674 mtx_lock(&Giant);
675 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
676 error = namei(&nd);
677 if (error == 0) {
678 error = vacl_set_acl(td, nd.ni_vp, SCARG(uap, type),
679 SCARG(uap, aclp));
680 NDFREE(&nd, 0);
681 }
682 mtx_unlock(&Giant);
683 return (error);
684}
685
686/*
687 * Given a file descriptor, get an ACL for it
688 *
689 * MPSAFE
690 */
691int
|
691__acl_get_fd( struct thread *td, struct __acl_get_fd_args *uap)
| 692__acl_get_fd(struct thread *td, struct __acl_get_fd_args *uap)
|
692{
693 struct file *fp;
694 int error;
695
696 mtx_lock(&Giant);
697 error = getvnode(td->td_proc->p_fd, SCARG(uap, filedes), &fp);
698 if (error == 0) {
699 error = vacl_get_acl(td, (struct vnode *)fp->f_data,
700 SCARG(uap, type), SCARG(uap, aclp));
701 }
702 mtx_unlock(&Giant);
703 return (error);
704}
705
706/*
707 * Given a file descriptor, set an ACL for it
708 *
709 * MPSAFE
710 */
711int
| 693{
694 struct file *fp;
695 int error;
696
697 mtx_lock(&Giant);
698 error = getvnode(td->td_proc->p_fd, SCARG(uap, filedes), &fp);
699 if (error == 0) {
700 error = vacl_get_acl(td, (struct vnode *)fp->f_data,
701 SCARG(uap, type), SCARG(uap, aclp));
702 }
703 mtx_unlock(&Giant);
704 return (error);
705}
706
707/*
708 * Given a file descriptor, set an ACL for it
709 *
710 * MPSAFE
711 */
712int
|
712__acl_set_fd( struct thread *td, struct __acl_set_fd_args *uap)
| 713__acl_set_fd(struct thread *td, struct __acl_set_fd_args *uap)
|
713{
714 struct file *fp;
715 int error;
716
717 mtx_lock(&Giant);
718 error = getvnode(td->td_proc->p_fd, SCARG(uap, filedes), &fp);
719 if (error == 0) {
720 error = vacl_set_acl(td, (struct vnode *)fp->f_data,
721 SCARG(uap, type), SCARG(uap, aclp));
722 }
723 mtx_unlock(&Giant);
724 return (error);
725}
726
727/*
728 * Given a file path, delete an ACL from it.
729 *
730 * MPSAFE
731 */
732int
| 714{
715 struct file *fp;
716 int error;
717
718 mtx_lock(&Giant);
719 error = getvnode(td->td_proc->p_fd, SCARG(uap, filedes), &fp);
720 if (error == 0) {
721 error = vacl_set_acl(td, (struct vnode *)fp->f_data,
722 SCARG(uap, type), SCARG(uap, aclp));
723 }
724 mtx_unlock(&Giant);
725 return (error);
726}
727
728/*
729 * Given a file path, delete an ACL from it.
730 *
731 * MPSAFE
732 */
733int
|
733__acl_delete_file( struct thread *td, struct __acl_delete_file_args *uap)
| 734__acl_delete_file(struct thread *td, struct __acl_delete_file_args *uap)
|
734{
735 struct nameidata nd;
736 int error;
737
738 mtx_lock(&Giant);
739 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
740 error = namei(&nd);
741 if (error == 0) {
742 error = vacl_delete(td, nd.ni_vp, SCARG(uap, type));
743 NDFREE(&nd, 0);
744 }
745 mtx_unlock(&Giant);
746 return (error);
747}
748
749/*
750 * Given a file path, delete an ACL from it.
751 *
752 * MPSAFE
753 */
754int
| 735{
736 struct nameidata nd;
737 int error;
738
739 mtx_lock(&Giant);
740 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
741 error = namei(&nd);
742 if (error == 0) {
743 error = vacl_delete(td, nd.ni_vp, SCARG(uap, type));
744 NDFREE(&nd, 0);
745 }
746 mtx_unlock(&Giant);
747 return (error);
748}
749
750/*
751 * Given a file path, delete an ACL from it.
752 *
753 * MPSAFE
754 */
755int
|
755__acl_delete_fd( struct thread *td, struct __acl_delete_fd_args *uap)
| 756__acl_delete_fd(struct thread *td, struct __acl_delete_fd_args *uap)
|
756{
757 struct file *fp;
758 int error;
759
760 mtx_lock(&Giant);
761 error = getvnode(td->td_proc->p_fd, SCARG(uap, filedes), &fp);
762 if (error == 0) {
763 error = vacl_delete(td, (struct vnode *)fp->f_data,
764 SCARG(uap, type));
765 }
766 mtx_unlock(&Giant);
767 return (error);
768}
769
770/*
771 * Given a file path, check an ACL for it
772 *
773 * MPSAFE
774 */
775int
| 757{
758 struct file *fp;
759 int error;
760
761 mtx_lock(&Giant);
762 error = getvnode(td->td_proc->p_fd, SCARG(uap, filedes), &fp);
763 if (error == 0) {
764 error = vacl_delete(td, (struct vnode *)fp->f_data,
765 SCARG(uap, type));
766 }
767 mtx_unlock(&Giant);
768 return (error);
769}
770
771/*
772 * Given a file path, check an ACL for it
773 *
774 * MPSAFE
775 */
776int
|
776__acl_aclcheck_file( struct thread *td, struct __acl_aclcheck_file_args *uap)
| 777__acl_aclcheck_file(struct thread *td, struct __acl_aclcheck_file_args *uap)
|
777{
778 struct nameidata nd;
779 int error;
780
781 mtx_lock(&Giant);
782 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
783 error = namei(&nd);
784 if (error == 0) {
785 error = vacl_aclcheck(td, nd.ni_vp, SCARG(uap, type),
786 SCARG(uap, aclp));
787 NDFREE(&nd, 0);
788 }
789 mtx_unlock(&Giant);
790 return (error);
791}
792
793/*
794 * Given a file descriptor, check an ACL for it
795 *
796 * MPSAFE
797 */
798int
| 778{
779 struct nameidata nd;
780 int error;
781
782 mtx_lock(&Giant);
783 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
784 error = namei(&nd);
785 if (error == 0) {
786 error = vacl_aclcheck(td, nd.ni_vp, SCARG(uap, type),
787 SCARG(uap, aclp));
788 NDFREE(&nd, 0);
789 }
790 mtx_unlock(&Giant);
791 return (error);
792}
793
794/*
795 * Given a file descriptor, check an ACL for it
796 *
797 * MPSAFE
798 */
799int
|
799__acl_aclcheck_fd( struct thread *td, struct __acl_aclcheck_fd_args *uap)
| 800__acl_aclcheck_fd(struct thread *td, struct __acl_aclcheck_fd_args *uap)
|
800{
801 struct file *fp;
802 int error;
803
804 mtx_lock(&Giant);
805 error = getvnode(td->td_proc->p_fd, SCARG(uap, filedes), &fp);
806 if (error == 0) {
807 error = vacl_aclcheck(td, (struct vnode *)fp->f_data,
808 SCARG(uap, type), SCARG(uap, aclp));
809 }
810 mtx_unlock(&Giant);
811 return (error);
812}
| 801{
802 struct file *fp;
803 int error;
804
805 mtx_lock(&Giant);
806 error = getvnode(td->td_proc->p_fd, SCARG(uap, filedes), &fp);
807 if (error == 0) {
808 error = vacl_aclcheck(td, (struct vnode *)fp->f_data,
809 SCARG(uap, type), SCARG(uap, aclp));
810 }
811 mtx_unlock(&Giant);
812 return (error);
813}
|