]> git.proxmox.com Git - mirror_zfs.git/blame - module/zfs/zfs_acl.c
projects / mirror_zfs.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Rebase master to b121
[mirror_zfs.git] / module / zfs / zfs_acl.c
CommitLineData
34dc7c2f
BB		 1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
9babb374 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
34dc7c2f
BB		 23 * Use is subject to license terms.
24 */
25
34dc7c2f
BB		 26#include <sys/types.h>
27#include <sys/param.h>
28#include <sys/time.h>
29#include <sys/systm.h>
30#include <sys/sysmacros.h>
31#include <sys/resource.h>
32#include <sys/vfs.h>
33#include <sys/vnode.h>
34#include <sys/sid.h>
35#include <sys/file.h>
36#include <sys/stat.h>
37#include <sys/kmem.h>
38#include <sys/cmn_err.h>
39#include <sys/errno.h>
40#include <sys/unistd.h>
41#include <sys/sdt.h>
42#include <sys/fs/zfs.h>
43#include <sys/mode.h>
44#include <sys/policy.h>
45#include <sys/zfs_znode.h>
46#include <sys/zfs_fuid.h>
47#include <sys/zfs_acl.h>
48#include <sys/zfs_dir.h>
49#include <sys/zfs_vfsops.h>
50#include <sys/dmu.h>
51#include <sys/dnode.h>
52#include <sys/zap.h>
53#include "fs/fs_subr.h"
54#include <acl/acl_common.h>
55
56#define ALLOW ACE_ACCESS_ALLOWED_ACE_TYPE
57#define DENY ACE_ACCESS_DENIED_ACE_TYPE
58#define MAX_ACE_TYPE ACE_SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE
b128c09f 59#define MIN_ACE_TYPE ALLOW
34dc7c2f
BB		 60
61#define OWNING_GROUP (ACE_GROUP|ACE_IDENTIFIER_GROUP)
62#define EVERYONE_ALLOW_MASK (ACE_READ_ACL|ACE_READ_ATTRIBUTES | \
63 ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE)
64#define EVERYONE_DENY_MASK (ACE_WRITE_ACL|ACE_WRITE_OWNER | \
65 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
66#define OWNER_ALLOW_MASK (ACE_WRITE_ACL | ACE_WRITE_OWNER | \
67 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
34dc7c2f
BB		 68
69#define ZFS_CHECKED_MASKS (ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_READ_DATA| \
70 ACE_READ_NAMED_ATTRS|ACE_WRITE_DATA|ACE_WRITE_ATTRIBUTES| \
71 ACE_WRITE_NAMED_ATTRS|ACE_APPEND_DATA|ACE_EXECUTE|ACE_WRITE_OWNER| \
72 ACE_WRITE_ACL|ACE_DELETE|ACE_DELETE_CHILD|ACE_SYNCHRONIZE)
73
9babb374
BB		 74#define WRITE_MASK_DATA (ACE_WRITE_DATA|ACE_APPEND_DATA|ACE_WRITE_NAMED_ATTRS)
75#define WRITE_MASK_ATTRS (ACE_WRITE_ACL|ACE_WRITE_OWNER|ACE_WRITE_ATTRIBUTES| \
76 ACE_DELETE|ACE_DELETE_CHILD)
77#define WRITE_MASK (WRITE_MASK_DATA|WRITE_MASK_ATTRS)
34dc7c2f
BB		 78
79#define OGE_CLEAR (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
80 ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
81
82#define OKAY_MASK_BITS (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
83 ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
84
85#define ALL_INHERIT (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE | \
86 ACE_NO_PROPAGATE_INHERIT_ACE|ACE_INHERIT_ONLY_ACE|ACE_INHERITED_ACE)
87
88#define RESTRICTED_CLEAR (ACE_WRITE_ACL|ACE_WRITE_OWNER)
89
90#define V4_ACL_WIDE_FLAGS (ZFS_ACL_AUTO_INHERIT|ZFS_ACL_DEFAULTED|\
91 ZFS_ACL_PROTECTED)
92
93#define ZFS_ACL_WIDE_FLAGS (V4_ACL_WIDE_FLAGS|ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|\
94 ZFS_ACL_OBJ_ACE)
95
45d1cae3
BB		 96#define ALL_MODE_EXECS (S_IXUSR | S_IXGRP | S_IXOTH)
97
34dc7c2f
BB		 98static uint16_t
99zfs_ace_v0_get_type(void *acep)
100{
101 return (((zfs_oldace_t *)acep)->z_type);
102}
103
104static uint16_t
105zfs_ace_v0_get_flags(void *acep)
106{
107 return (((zfs_oldace_t *)acep)->z_flags);
108}
109
110static uint32_t
111zfs_ace_v0_get_mask(void *acep)
112{
113 return (((zfs_oldace_t *)acep)->z_access_mask);
114}
115
116static uint64_t
117zfs_ace_v0_get_who(void *acep)
118{
119 return (((zfs_oldace_t *)acep)->z_fuid);
120}
121
122static void
123zfs_ace_v0_set_type(void *acep, uint16_t type)
124{
125 ((zfs_oldace_t *)acep)->z_type = type;
126}
127
128static void
129zfs_ace_v0_set_flags(void *acep, uint16_t flags)
130{
131 ((zfs_oldace_t *)acep)->z_flags = flags;
132}
133
134static void
135zfs_ace_v0_set_mask(void *acep, uint32_t mask)
136{
137 ((zfs_oldace_t *)acep)->z_access_mask = mask;
138}
139
140static void
141zfs_ace_v0_set_who(void *acep, uint64_t who)
142{
143 ((zfs_oldace_t *)acep)->z_fuid = who;
144}
145
146/*ARGSUSED*/
147static size_t
148zfs_ace_v0_size(void *acep)
149{
150 return (sizeof (zfs_oldace_t));
151}
152
153static size_t
154zfs_ace_v0_abstract_size(void)
155{
156 return (sizeof (zfs_oldace_t));
157}
158
159static int
160zfs_ace_v0_mask_off(void)
161{
162 return (offsetof(zfs_oldace_t, z_access_mask));
163}
164
165/*ARGSUSED*/
166static int
167zfs_ace_v0_data(void *acep, void **datap)
168{
169 *datap = NULL;
170 return (0);
171}
172
173static acl_ops_t zfs_acl_v0_ops = {
174 zfs_ace_v0_get_mask,
175 zfs_ace_v0_set_mask,
176 zfs_ace_v0_get_flags,
177 zfs_ace_v0_set_flags,
178 zfs_ace_v0_get_type,
179 zfs_ace_v0_set_type,
180 zfs_ace_v0_get_who,
181 zfs_ace_v0_set_who,
182 zfs_ace_v0_size,
183 zfs_ace_v0_abstract_size,
184 zfs_ace_v0_mask_off,
185 zfs_ace_v0_data
186};
187
188static uint16_t
189zfs_ace_fuid_get_type(void *acep)
190{
191 return (((zfs_ace_hdr_t *)acep)->z_type);
192}
193
194static uint16_t
195zfs_ace_fuid_get_flags(void *acep)
196{
197 return (((zfs_ace_hdr_t *)acep)->z_flags);
198}
199
200static uint32_t
201zfs_ace_fuid_get_mask(void *acep)
202{
203 return (((zfs_ace_hdr_t *)acep)->z_access_mask);
204}
205
206static uint64_t
207zfs_ace_fuid_get_who(void *args)
208{
209 uint16_t entry_type;
210 zfs_ace_t *acep = args;
211
212 entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
213
214 if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
215 entry_type == ACE_EVERYONE)
216 return (-1);
217 return (((zfs_ace_t *)acep)->z_fuid);
218}
219
220static void
221zfs_ace_fuid_set_type(void *acep, uint16_t type)
222{
223 ((zfs_ace_hdr_t *)acep)->z_type = type;
224}
225
226static void
227zfs_ace_fuid_set_flags(void *acep, uint16_t flags)
228{
229 ((zfs_ace_hdr_t *)acep)->z_flags = flags;
230}
231
232static void
233zfs_ace_fuid_set_mask(void *acep, uint32_t mask)
234{
235 ((zfs_ace_hdr_t *)acep)->z_access_mask = mask;
236}
237
238static void
239zfs_ace_fuid_set_who(void *arg, uint64_t who)
240{
241 zfs_ace_t *acep = arg;
242
243 uint16_t entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
244
245 if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
246 entry_type == ACE_EVERYONE)
247 return;
248 acep->z_fuid = who;
249}
250
251static size_t
252zfs_ace_fuid_size(void *acep)
253{
254 zfs_ace_hdr_t *zacep = acep;
255 uint16_t entry_type;
256
257 switch (zacep->z_type) {
258 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
259 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
260 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
261 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
262 return (sizeof (zfs_object_ace_t));
263 case ALLOW:
264 case DENY:
265 entry_type =
266 (((zfs_ace_hdr_t *)acep)->z_flags & ACE_TYPE_FLAGS);
267 if (entry_type == ACE_OWNER ||
b128c09f 268 entry_type == OWNING_GROUP ||
34dc7c2f
BB		 269 entry_type == ACE_EVERYONE)
270 return (sizeof (zfs_ace_hdr_t));
271 /*FALLTHROUGH*/
272 default:
273 return (sizeof (zfs_ace_t));
274 }
275}
276
277static size_t
278zfs_ace_fuid_abstract_size(void)
279{
280 return (sizeof (zfs_ace_hdr_t));
281}
282
283static int
284zfs_ace_fuid_mask_off(void)
285{
286 return (offsetof(zfs_ace_hdr_t, z_access_mask));
287}
288
289static int
290zfs_ace_fuid_data(void *acep, void **datap)
291{
292 zfs_ace_t *zacep = acep;
293 zfs_object_ace_t *zobjp;
294
295 switch (zacep->z_hdr.z_type) {
296 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
297 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
298 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
299 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
300 zobjp = acep;
301 *datap = (caddr_t)zobjp + sizeof (zfs_ace_t);
302 return (sizeof (zfs_object_ace_t) - sizeof (zfs_ace_t));
303 default:
304 *datap = NULL;
305 return (0);
306 }
307}
308
309static acl_ops_t zfs_acl_fuid_ops = {
310 zfs_ace_fuid_get_mask,
311 zfs_ace_fuid_set_mask,
312 zfs_ace_fuid_get_flags,
313 zfs_ace_fuid_set_flags,
314 zfs_ace_fuid_get_type,
315 zfs_ace_fuid_set_type,
316 zfs_ace_fuid_get_who,
317 zfs_ace_fuid_set_who,
318 zfs_ace_fuid_size,
319 zfs_ace_fuid_abstract_size,
320 zfs_ace_fuid_mask_off,
321 zfs_ace_fuid_data
322};
323
324static int
325zfs_acl_version(int version)
326{
327 if (version < ZPL_VERSION_FUID)
328 return (ZFS_ACL_VERSION_INITIAL);
329 else
330 return (ZFS_ACL_VERSION_FUID);
331}
332
333static int
334zfs_acl_version_zp(znode_t *zp)
335{
336 return (zfs_acl_version(zp->z_zfsvfs->z_version));
337}
338
339static zfs_acl_t *
340zfs_acl_alloc(int vers)
341{
342 zfs_acl_t *aclp;
343
344 aclp = kmem_zalloc(sizeof (zfs_acl_t), KM_SLEEP);
345 list_create(&aclp->z_acl, sizeof (zfs_acl_node_t),
346 offsetof(zfs_acl_node_t, z_next));
347 aclp->z_version = vers;
348 if (vers == ZFS_ACL_VERSION_FUID)
349 aclp->z_ops = zfs_acl_fuid_ops;
350 else
351 aclp->z_ops = zfs_acl_v0_ops;
352 return (aclp);
353}
354
355static zfs_acl_node_t *
356zfs_acl_node_alloc(size_t bytes)
357{
358 zfs_acl_node_t *aclnode;
359
360 aclnode = kmem_zalloc(sizeof (zfs_acl_node_t), KM_SLEEP);
361 if (bytes) {
362 aclnode->z_acldata = kmem_alloc(bytes, KM_SLEEP);
363 aclnode->z_allocdata = aclnode->z_acldata;
364 aclnode->z_allocsize = bytes;
365 aclnode->z_size = bytes;
366 }
367
368 return (aclnode);
369}
370
371static void
372zfs_acl_node_free(zfs_acl_node_t *aclnode)
373{
374 if (aclnode->z_allocsize)
375 kmem_free(aclnode->z_allocdata, aclnode->z_allocsize);
376 kmem_free(aclnode, sizeof (zfs_acl_node_t));
377}
378
379static void
380zfs_acl_release_nodes(zfs_acl_t *aclp)
381{
382 zfs_acl_node_t *aclnode;
383
384 while (aclnode = list_head(&aclp->z_acl)) {
385 list_remove(&aclp->z_acl, aclnode);
386 zfs_acl_node_free(aclnode);
387 }
388 aclp->z_acl_count = 0;
389 aclp->z_acl_bytes = 0;
390}
391
392void
393zfs_acl_free(zfs_acl_t *aclp)
394{
395 zfs_acl_release_nodes(aclp);
396 list_destroy(&aclp->z_acl);
397 kmem_free(aclp, sizeof (zfs_acl_t));
398}
399
400static boolean_t
b128c09f 401zfs_acl_valid_ace_type(uint_t type, uint_t flags)
34dc7c2f 402{
b128c09f 403 uint16_t entry_type;
34dc7c2f 404
b128c09f
BB		 405 switch (type) {
406 case ALLOW:
407 case DENY:
408 case ACE_SYSTEM_AUDIT_ACE_TYPE:
409 case ACE_SYSTEM_ALARM_ACE_TYPE:
410 entry_type = flags & ACE_TYPE_FLAGS;
411 return (entry_type == ACE_OWNER ||
412 entry_type == OWNING_GROUP ||
413 entry_type == ACE_EVERYONE || entry_type == 0 ||
414 entry_type == ACE_IDENTIFIER_GROUP);
34dc7c2f 415 default:
b128c09f
BB		 416 if (type >= MIN_ACE_TYPE && type <= MAX_ACE_TYPE)
417 return (B_TRUE);
34dc7c2f 418 }
b128c09f
BB		 419 return (B_FALSE);
420}
34dc7c2f 421
b128c09f
BB		 422static boolean_t
423zfs_ace_valid(vtype_t obj_type, zfs_acl_t *aclp, uint16_t type, uint16_t iflags)
424{
34dc7c2f 425 /*
b128c09f 426 * first check type of entry
34dc7c2f
BB		 427 */
428
b128c09f 429 if (!zfs_acl_valid_ace_type(type, iflags))
34dc7c2f 430 return (B_FALSE);
34dc7c2f
BB		 431
432 switch (type) {
433 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
434 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
435 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
436 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
437 if (aclp->z_version < ZFS_ACL_VERSION_FUID)
438 return (B_FALSE);
439 aclp->z_hints |= ZFS_ACL_OBJ_ACE;
440 }
441
442 /*
b128c09f 443 * next check inheritance level flags
34dc7c2f 444 */
34dc7c2f 445
b128c09f
BB		 446 if (obj_type == VDIR &&
447 (iflags & (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE)))
34dc7c2f
BB		 448 aclp->z_hints |= ZFS_INHERIT_ACE;
449
450 if (iflags & (ACE_INHERIT_ONLY_ACE|ACE_NO_PROPAGATE_INHERIT_ACE)) {
451 if ((iflags & (ACE_FILE_INHERIT_ACE|
452 ACE_DIRECTORY_INHERIT_ACE)) == 0) {
453 return (B_FALSE);
454 }
455 }
456
457 return (B_TRUE);
458}
459
460static void *
461zfs_acl_next_ace(zfs_acl_t *aclp, void *start, uint64_t *who,
462 uint32_t *access_mask, uint16_t *iflags, uint16_t *type)
463{
464 zfs_acl_node_t *aclnode;
465
466 if (start == NULL) {
467 aclnode = list_head(&aclp->z_acl);
468 if (aclnode == NULL)
469 return (NULL);
470
471 aclp->z_next_ace = aclnode->z_acldata;
472 aclp->z_curr_node = aclnode;
473 aclnode->z_ace_idx = 0;
474 }
475
476 aclnode = aclp->z_curr_node;
477
478 if (aclnode == NULL)
479 return (NULL);
480
481 if (aclnode->z_ace_idx >= aclnode->z_ace_count) {
482 aclnode = list_next(&aclp->z_acl, aclnode);
483 if (aclnode == NULL)
484 return (NULL);
485 else {
486 aclp->z_curr_node = aclnode;
487 aclnode->z_ace_idx = 0;
488 aclp->z_next_ace = aclnode->z_acldata;
489 }
490 }
491
492 if (aclnode->z_ace_idx < aclnode->z_ace_count) {
493 void *acep = aclp->z_next_ace;
b128c09f
BB		 494 size_t ace_size;
495
496 /*
497 * Make sure we don't overstep our bounds
498 */
499 ace_size = aclp->z_ops.ace_size(acep);
500
501 if (((caddr_t)acep + ace_size) >
502 ((caddr_t)aclnode->z_acldata + aclnode->z_size)) {
503 return (NULL);
504 }
505
34dc7c2f
BB		 506 *iflags = aclp->z_ops.ace_flags_get(acep);
507 *type = aclp->z_ops.ace_type_get(acep);
508 *access_mask = aclp->z_ops.ace_mask_get(acep);
509 *who = aclp->z_ops.ace_who_get(acep);
b128c09f 510 aclp->z_next_ace = (caddr_t)aclp->z_next_ace + ace_size;
34dc7c2f
BB		 511 aclnode->z_ace_idx++;
512 return ((void *)acep);
513 }
514 return (NULL);
515}
516
517/*ARGSUSED*/
518static uint64_t
519zfs_ace_walk(void *datap, uint64_t cookie, int aclcnt,
520 uint16_t *flags, uint16_t *type, uint32_t *mask)
521{
522 zfs_acl_t *aclp = datap;
523 zfs_ace_hdr_t *acep = (zfs_ace_hdr_t *)(uintptr_t)cookie;
524 uint64_t who;
525
526 acep = zfs_acl_next_ace(aclp, acep, &who, mask,
527 flags, type);
528 return ((uint64_t)(uintptr_t)acep);
529}
530
531static zfs_acl_node_t *
532zfs_acl_curr_node(zfs_acl_t *aclp)
533{
534 ASSERT(aclp->z_curr_node);
535 return (aclp->z_curr_node);
536}
537
538/*
539 * Copy ACE to internal ZFS format.
540 * While processing the ACL each ACE will be validated for correctness.
541 * ACE FUIDs will be created later.
542 */
543int
9babb374
BB		 544zfs_copy_ace_2_fuid(zfsvfs_t *zfsvfs, vtype_t obj_type, zfs_acl_t *aclp,
545 void *datap, zfs_ace_t *z_acl, int aclcnt, size_t *size,
546 zfs_fuid_info_t **fuidp, cred_t *cr)
34dc7c2f
BB		 547{
548 int i;
549 uint16_t entry_type;
550 zfs_ace_t *aceptr = z_acl;
551 ace_t *acep = datap;
552 zfs_object_ace_t *zobjacep;
553 ace_object_t *aceobjp;
554
555 for (i = 0; i != aclcnt; i++) {
556 aceptr->z_hdr.z_access_mask = acep->a_access_mask;
557 aceptr->z_hdr.z_flags = acep->a_flags;
558 aceptr->z_hdr.z_type = acep->a_type;
559 entry_type = aceptr->z_hdr.z_flags & ACE_TYPE_FLAGS;
560 if (entry_type != ACE_OWNER && entry_type != OWNING_GROUP &&
561 entry_type != ACE_EVERYONE) {
9babb374
BB		 562 aceptr->z_fuid = zfs_fuid_create(zfsvfs, acep->a_who,
563 cr, (entry_type == 0) ?
564 ZFS_ACE_USER : ZFS_ACE_GROUP, fuidp);
34dc7c2f
BB		 565 }
566
567 /*
568 * Make sure ACE is valid
569 */
570 if (zfs_ace_valid(obj_type, aclp, aceptr->z_hdr.z_type,
571 aceptr->z_hdr.z_flags) != B_TRUE)
572 return (EINVAL);
573
574 switch (acep->a_type) {
575 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
576 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
577 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
578 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
579 zobjacep = (zfs_object_ace_t *)aceptr;
580 aceobjp = (ace_object_t *)acep;
581
582 bcopy(aceobjp->a_obj_type, zobjacep->z_object_type,
583 sizeof (aceobjp->a_obj_type));
584 bcopy(aceobjp->a_inherit_obj_type,
585 zobjacep->z_inherit_type,
586 sizeof (aceobjp->a_inherit_obj_type));
587 acep = (ace_t *)((caddr_t)acep + sizeof (ace_object_t));
588 break;
589 default:
590 acep = (ace_t *)((caddr_t)acep + sizeof (ace_t));
591 }
592
593 aceptr = (zfs_ace_t *)((caddr_t)aceptr +
594 aclp->z_ops.ace_size(aceptr));
595 }
596
597 *size = (caddr_t)aceptr - (caddr_t)z_acl;
598
599 return (0);
600}
601
602/*
603 * Copy ZFS ACEs to fixed size ace_t layout
604 */
605static void
606zfs_copy_fuid_2_ace(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, cred_t *cr,
607 void *datap, int filter)
608{
609 uint64_t who;
610 uint32_t access_mask;
611 uint16_t iflags, type;
612 zfs_ace_hdr_t *zacep = NULL;
613 ace_t *acep = datap;
614 ace_object_t *objacep;
615 zfs_object_ace_t *zobjacep;
616 size_t ace_size;
617 uint16_t entry_type;
618
619 while (zacep = zfs_acl_next_ace(aclp, zacep,
620 &who, &access_mask, &iflags, &type)) {
621
622 switch (type) {
623 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
624 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
625 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
626 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
627 if (filter) {
628 continue;
629 }
630 zobjacep = (zfs_object_ace_t *)zacep;
631 objacep = (ace_object_t *)acep;
632 bcopy(zobjacep->z_object_type,
633 objacep->a_obj_type,
634 sizeof (zobjacep->z_object_type));
635 bcopy(zobjacep->z_inherit_type,
636 objacep->a_inherit_obj_type,
637 sizeof (zobjacep->z_inherit_type));
638 ace_size = sizeof (ace_object_t);
639 break;
640 default:
641 ace_size = sizeof (ace_t);
642 break;
643 }
644
645 entry_type = (iflags & ACE_TYPE_FLAGS);
646 if ((entry_type != ACE_OWNER &&
b128c09f 647 entry_type != OWNING_GROUP &&
34dc7c2f
BB		 648 entry_type != ACE_EVERYONE)) {
649 acep->a_who = zfs_fuid_map_id(zfsvfs, who,
650 cr, (entry_type & ACE_IDENTIFIER_GROUP) ?
651 ZFS_ACE_GROUP : ZFS_ACE_USER);
652 } else {
653 acep->a_who = (uid_t)(int64_t)who;
654 }
655 acep->a_access_mask = access_mask;
656 acep->a_flags = iflags;
657 acep->a_type = type;
658 acep = (ace_t *)((caddr_t)acep + ace_size);
659 }
660}
661
662static int
663zfs_copy_ace_2_oldace(vtype_t obj_type, zfs_acl_t *aclp, ace_t *acep,
664 zfs_oldace_t *z_acl, int aclcnt, size_t *size)
665{
666 int i;
667 zfs_oldace_t *aceptr = z_acl;
668
669 for (i = 0; i != aclcnt; i++, aceptr++) {
670 aceptr->z_access_mask = acep[i].a_access_mask;
671 aceptr->z_type = acep[i].a_type;
672 aceptr->z_flags = acep[i].a_flags;
673 aceptr->z_fuid = acep[i].a_who;
674 /*
675 * Make sure ACE is valid
676 */
677 if (zfs_ace_valid(obj_type, aclp, aceptr->z_type,
678 aceptr->z_flags) != B_TRUE)
679 return (EINVAL);
680 }
681 *size = (caddr_t)aceptr - (caddr_t)z_acl;
682 return (0);
683}
684
685/*
686 * convert old ACL format to new
687 */
688void
9babb374 689zfs_acl_xform(znode_t *zp, zfs_acl_t *aclp, cred_t *cr)
34dc7c2f
BB		 690{
691 zfs_oldace_t *oldaclp;
692 int i;
693 uint16_t type, iflags;
694 uint32_t access_mask;
695 uint64_t who;
696 void *cookie = NULL;
697 zfs_acl_node_t *newaclnode;
698
699 ASSERT(aclp->z_version == ZFS_ACL_VERSION_INITIAL);
700 /*
701 * First create the ACE in a contiguous piece of memory
702 * for zfs_copy_ace_2_fuid().
703 *
704 * We only convert an ACL once, so this won't happen
705 * everytime.
706 */
707 oldaclp = kmem_alloc(sizeof (zfs_oldace_t) * aclp->z_acl_count,
708 KM_SLEEP);
709 i = 0;
710 while (cookie = zfs_acl_next_ace(aclp, cookie, &who,
711 &access_mask, &iflags, &type)) {
712 oldaclp[i].z_flags = iflags;
713 oldaclp[i].z_type = type;
714 oldaclp[i].z_fuid = who;
715 oldaclp[i++].z_access_mask = access_mask;
716 }
717
718 newaclnode = zfs_acl_node_alloc(aclp->z_acl_count *
719 sizeof (zfs_object_ace_t));
720 aclp->z_ops = zfs_acl_fuid_ops;
9babb374
BB		 721 VERIFY(zfs_copy_ace_2_fuid(zp->z_zfsvfs, ZTOV(zp)->v_type, aclp,
722 oldaclp, newaclnode->z_acldata, aclp->z_acl_count,
723 &newaclnode->z_size, NULL, cr) == 0);
34dc7c2f
BB		 724 newaclnode->z_ace_count = aclp->z_acl_count;
725 aclp->z_version = ZFS_ACL_VERSION;
726 kmem_free(oldaclp, aclp->z_acl_count * sizeof (zfs_oldace_t));
727
728 /*
729 * Release all previous ACL nodes
730 */
731
732 zfs_acl_release_nodes(aclp);
733
734 list_insert_head(&aclp->z_acl, newaclnode);
735
736 aclp->z_acl_bytes = newaclnode->z_size;
737 aclp->z_acl_count = newaclnode->z_ace_count;
738
739}
740
741/*
742 * Convert unix access mask to v4 access mask
743 */
744static uint32_t
745zfs_unix_to_v4(uint32_t access_mask)
746{
747 uint32_t new_mask = 0;
748
749 if (access_mask & S_IXOTH)
750 new_mask |= ACE_EXECUTE;
751 if (access_mask & S_IWOTH)
752 new_mask |= ACE_WRITE_DATA;
753 if (access_mask & S_IROTH)
754 new_mask |= ACE_READ_DATA;
755 return (new_mask);
756}
757
758static void
759zfs_set_ace(zfs_acl_t *aclp, void *acep, uint32_t access_mask,
760 uint16_t access_type, uint64_t fuid, uint16_t entry_type)
761{
762 uint16_t type = entry_type & ACE_TYPE_FLAGS;
763
764 aclp->z_ops.ace_mask_set(acep, access_mask);
765 aclp->z_ops.ace_type_set(acep, access_type);
766 aclp->z_ops.ace_flags_set(acep, entry_type);
b128c09f 767 if ((type != ACE_OWNER && type != OWNING_GROUP &&
34dc7c2f
BB		 768 type != ACE_EVERYONE))
769 aclp->z_ops.ace_who_set(acep, fuid);
770}
771
772/*
773 * Determine mode of file based on ACL.
774 * Also, create FUIDs for any User/Group ACEs
775 */
776static uint64_t
9babb374 777zfs_mode_compute(znode_t *zp, zfs_acl_t *aclp)
34dc7c2f
BB		 778{
779 int entry_type;
780 mode_t mode;
781 mode_t seen = 0;
782 zfs_ace_hdr_t *acep = NULL;
783 uint64_t who;
784 uint16_t iflags, type;
785 uint32_t access_mask;
45d1cae3 786 boolean_t an_exec_denied = B_FALSE;
34dc7c2f
BB		 787
788 mode = (zp->z_phys->zp_mode & (S_IFMT | S_ISUID | S_ISGID | S_ISVTX));
789
790 while (acep = zfs_acl_next_ace(aclp, acep, &who,
791 &access_mask, &iflags, &type)) {
792
b128c09f 793 if (!zfs_acl_valid_ace_type(type, iflags))
34dc7c2f
BB		 794 continue;
795
796 entry_type = (iflags & ACE_TYPE_FLAGS);
797
b128c09f
BB		 798 /*
799 * Skip over owner@, group@ or everyone@ inherit only ACEs
800 */
801 if ((iflags & ACE_INHERIT_ONLY_ACE) &&
802 (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
803 entry_type == OWNING_GROUP))
804 continue;
805
34dc7c2f
BB		 806 if (entry_type == ACE_OWNER) {
807 if ((access_mask & ACE_READ_DATA) &&
808 (!(seen & S_IRUSR))) {
809 seen |= S_IRUSR;
810 if (type == ALLOW) {
811 mode |= S_IRUSR;
812 }
813 }
814 if ((access_mask & ACE_WRITE_DATA) &&
815 (!(seen & S_IWUSR))) {
816 seen |= S_IWUSR;
817 if (type == ALLOW) {
818 mode |= S_IWUSR;
819 }
820 }
821 if ((access_mask & ACE_EXECUTE) &&
822 (!(seen & S_IXUSR))) {
823 seen |= S_IXUSR;
824 if (type == ALLOW) {
825 mode |= S_IXUSR;
826 }
827 }
828 } else if (entry_type == OWNING_GROUP) {
829 if ((access_mask & ACE_READ_DATA) &&
830 (!(seen & S_IRGRP))) {
831 seen |= S_IRGRP;
832 if (type == ALLOW) {
833 mode |= S_IRGRP;
834 }
835 }
836 if ((access_mask & ACE_WRITE_DATA) &&
837 (!(seen & S_IWGRP))) {
838 seen |= S_IWGRP;
839 if (type == ALLOW) {
840 mode |= S_IWGRP;
841 }
842 }
843 if ((access_mask & ACE_EXECUTE) &&
844 (!(seen & S_IXGRP))) {
845 seen |= S_IXGRP;
846 if (type == ALLOW) {
847 mode |= S_IXGRP;
848 }
849 }
850 } else if (entry_type == ACE_EVERYONE) {
851 if ((access_mask & ACE_READ_DATA)) {
852 if (!(seen & S_IRUSR)) {
853 seen |= S_IRUSR;
854 if (type == ALLOW) {
855 mode |= S_IRUSR;
856 }
857 }
858 if (!(seen & S_IRGRP)) {
859 seen |= S_IRGRP;
860 if (type == ALLOW) {
861 mode |= S_IRGRP;
862 }
863 }
864 if (!(seen & S_IROTH)) {
865 seen |= S_IROTH;
866 if (type == ALLOW) {
867 mode |= S_IROTH;
868 }
869 }
870 }
871 if ((access_mask & ACE_WRITE_DATA)) {
872 if (!(seen & S_IWUSR)) {
873 seen |= S_IWUSR;
874 if (type == ALLOW) {
875 mode |= S_IWUSR;
876 }
877 }
878 if (!(seen & S_IWGRP)) {
879 seen |= S_IWGRP;
880 if (type == ALLOW) {
881 mode |= S_IWGRP;
882 }
883 }
884 if (!(seen & S_IWOTH)) {
885 seen |= S_IWOTH;
886 if (type == ALLOW) {
887 mode |= S_IWOTH;
888 }
889 }
890 }
891 if ((access_mask & ACE_EXECUTE)) {
892 if (!(seen & S_IXUSR)) {
893 seen |= S_IXUSR;
894 if (type == ALLOW) {
895 mode |= S_IXUSR;
896 }
897 }
898 if (!(seen & S_IXGRP)) {
899 seen |= S_IXGRP;
900 if (type == ALLOW) {
901 mode |= S_IXGRP;
902 }
903 }
904 if (!(seen & S_IXOTH)) {
905 seen |= S_IXOTH;
906 if (type == ALLOW) {
907 mode |= S_IXOTH;
908 }
909 }
910 }
45d1cae3
BB		 911 } else {
912 /*
913 * Only care if this IDENTIFIER_GROUP or
914 * USER ACE denies execute access to someone,
915 * mode is not affected
916 */
917 if ((access_mask & ACE_EXECUTE) && type == DENY)
918 an_exec_denied = B_TRUE;
34dc7c2f 919 }
34dc7c2f 920 }
45d1cae3
BB		 921
922 /*
923 * Failure to allow is effectively a deny, so execute permission
924 * is denied if it was never mentioned or if we explicitly
925 * weren't allowed it.
926 */
927 if (!an_exec_denied &&
928 ((seen & ALL_MODE_EXECS) != ALL_MODE_EXECS ||
929 (mode & ALL_MODE_EXECS) != ALL_MODE_EXECS))
930 an_exec_denied = B_TRUE;
931
932 if (an_exec_denied)
933 zp->z_phys->zp_flags &= ~ZFS_NO_EXECS_DENIED;
934 else
935 zp->z_phys->zp_flags |= ZFS_NO_EXECS_DENIED;
936
34dc7c2f
BB		 937 return (mode);
938}
939
940static zfs_acl_t *
941zfs_acl_node_read_internal(znode_t *zp, boolean_t will_modify)
942{
943 zfs_acl_t *aclp;
944 zfs_acl_node_t *aclnode;
945
946 aclp = zfs_acl_alloc(zp->z_phys->zp_acl.z_acl_version);
947
948 /*
949 * Version 0 to 1 znode_acl_phys has the size/count fields swapped.
950 * Version 0 didn't have a size field, only a count.
951 */
952 if (zp->z_phys->zp_acl.z_acl_version == ZFS_ACL_VERSION_INITIAL) {
953 aclp->z_acl_count = zp->z_phys->zp_acl.z_acl_size;
954 aclp->z_acl_bytes = ZFS_ACL_SIZE(aclp->z_acl_count);
955 } else {
956 aclp->z_acl_count = zp->z_phys->zp_acl.z_acl_count;
957 aclp->z_acl_bytes = zp->z_phys->zp_acl.z_acl_size;
958 }
959
960 aclnode = zfs_acl_node_alloc(will_modify ? aclp->z_acl_bytes : 0);
961 aclnode->z_ace_count = aclp->z_acl_count;
962 if (will_modify) {
963 bcopy(zp->z_phys->zp_acl.z_ace_data, aclnode->z_acldata,
964 aclp->z_acl_bytes);
965 } else {
966 aclnode->z_size = aclp->z_acl_bytes;
967 aclnode->z_acldata = &zp->z_phys->zp_acl.z_ace_data[0];
968 }
969
970 list_insert_head(&aclp->z_acl, aclnode);
971
972 return (aclp);
973}
974
975/*
45d1cae3
BB		 976 * Read an external acl object. If the intent is to modify, always
977 * create a new acl and leave any cached acl in place.
34dc7c2f
BB		 978 */
979static int
980zfs_acl_node_read(znode_t *zp, zfs_acl_t **aclpp, boolean_t will_modify)
981{
982 uint64_t extacl = zp->z_phys->zp_acl.z_acl_extern_obj;
983 zfs_acl_t *aclp;
984 size_t aclsize;
985 size_t acl_count;
986 zfs_acl_node_t *aclnode;
987 int error;
988
989 ASSERT(MUTEX_HELD(&zp->z_acl_lock));
990
45d1cae3
BB		 991 if (zp->z_acl_cached && !will_modify) {
992 *aclpp = zp->z_acl_cached;
993 return (0);
994 }
995
34dc7c2f
BB		 996 if (zp->z_phys->zp_acl.z_acl_extern_obj == 0) {
997 *aclpp = zfs_acl_node_read_internal(zp, will_modify);
45d1cae3
BB		 998 if (!will_modify)
999 zp->z_acl_cached = *aclpp;
34dc7c2f
BB		 1000 return (0);
1001 }
1002
1003 aclp = zfs_acl_alloc(zp->z_phys->zp_acl.z_acl_version);
1004 if (zp->z_phys->zp_acl.z_acl_version == ZFS_ACL_VERSION_INITIAL) {
1005 zfs_acl_phys_v0_t *zacl0 =
1006 (zfs_acl_phys_v0_t *)&zp->z_phys->zp_acl;
1007
1008 aclsize = ZFS_ACL_SIZE(zacl0->z_acl_count);
1009 acl_count = zacl0->z_acl_count;
1010 } else {
1011 aclsize = zp->z_phys->zp_acl.z_acl_size;
1012 acl_count = zp->z_phys->zp_acl.z_acl_count;
1013 if (aclsize == 0)
1014 aclsize = acl_count * sizeof (zfs_ace_t);
1015 }
1016 aclnode = zfs_acl_node_alloc(aclsize);
1017 list_insert_head(&aclp->z_acl, aclnode);
1018 error = dmu_read(zp->z_zfsvfs->z_os, extacl, 0,
9babb374 1019 aclsize, aclnode->z_acldata, DMU_READ_PREFETCH);
34dc7c2f
BB		 1020 aclnode->z_ace_count = acl_count;
1021 aclp->z_acl_count = acl_count;
1022 aclp->z_acl_bytes = aclsize;
1023
1024 if (error != 0) {
1025 zfs_acl_free(aclp);
b128c09f
BB		 1026 /* convert checksum errors into IO errors */
1027 if (error == ECKSUM)
1028 error = EIO;
34dc7c2f
BB		 1029 return (error);
1030 }
1031
1032 *aclpp = aclp;
45d1cae3
BB		 1033 if (!will_modify)
1034 zp->z_acl_cached = aclp;
34dc7c2f
BB		 1035 return (0);
1036}
1037
1038/*
1039 * common code for setting ACLs.
1040 *
1041 * This function is called from zfs_mode_update, zfs_perm_init, and zfs_setacl.
1042 * zfs_setacl passes a non-NULL inherit pointer (ihp) to indicate that it's
1043 * already checked the acl and knows whether to inherit.
1044 */
1045int
9babb374 1046zfs_aclset_common(znode_t *zp, zfs_acl_t *aclp, cred_t *cr, dmu_tx_t *tx)
34dc7c2f
BB		 1047{
1048 int error;
1049 znode_phys_t *zphys = zp->z_phys;
1050 zfs_acl_phys_t *zacl = &zphys->zp_acl;
1051 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1052 uint64_t aoid = zphys->zp_acl.z_acl_extern_obj;
1053 uint64_t off = 0;
1054 dmu_object_type_t otype;
1055 zfs_acl_node_t *aclnode;
1056
34dc7c2f
BB		 1057 dmu_buf_will_dirty(zp->z_dbuf, tx);
1058
45d1cae3
BB		 1059 if (zp->z_acl_cached) {
1060 zfs_acl_free(zp->z_acl_cached);
1061 zp->z_acl_cached = NULL;
1062 }
1063
9babb374 1064 zphys->zp_mode = zfs_mode_compute(zp, aclp);
34dc7c2f
BB		 1065
1066 /*
45d1cae3
BB		 1067 * Decide which object type to use. If we are forced to
1068 * use old ACL format then transform ACL into zfs_oldace_t
34dc7c2f
BB		 1069 * layout.
1070 */
1071 if (!zfsvfs->z_use_fuids) {
1072 otype = DMU_OT_OLDACL;
1073 } else {
1074 if ((aclp->z_version == ZFS_ACL_VERSION_INITIAL) &&
1075 (zfsvfs->z_version >= ZPL_VERSION_FUID))
9babb374 1076 zfs_acl_xform(zp, aclp, cr);
34dc7c2f
BB		 1077 ASSERT(aclp->z_version >= ZFS_ACL_VERSION_FUID);
1078 otype = DMU_OT_ACL;
1079 }
1080
1081 if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
1082 /*
1083 * If ACL was previously external and we are now
1084 * converting to new ACL format then release old
1085 * ACL object and create a new one.
1086 */
1087 if (aoid && aclp->z_version != zacl->z_acl_version) {
1088 error = dmu_object_free(zfsvfs->z_os,
1089 zp->z_phys->zp_acl.z_acl_extern_obj, tx);
1090 if (error)
1091 return (error);
1092 aoid = 0;
1093 }
1094 if (aoid == 0) {
1095 aoid = dmu_object_alloc(zfsvfs->z_os,
1096 otype, aclp->z_acl_bytes,
1097 otype == DMU_OT_ACL ? DMU_OT_SYSACL : DMU_OT_NONE,
1098 otype == DMU_OT_ACL ? DN_MAX_BONUSLEN : 0, tx);
1099 } else {
1100 (void) dmu_object_set_blocksize(zfsvfs->z_os, aoid,
1101 aclp->z_acl_bytes, 0, tx);
1102 }
1103 zphys->zp_acl.z_acl_extern_obj = aoid;
1104 for (aclnode = list_head(&aclp->z_acl); aclnode;
1105 aclnode = list_next(&aclp->z_acl, aclnode)) {
1106 if (aclnode->z_ace_count == 0)
1107 continue;
1108 dmu_write(zfsvfs->z_os, aoid, off,
1109 aclnode->z_size, aclnode->z_acldata, tx);
1110 off += aclnode->z_size;
1111 }
1112 } else {
1113 void *start = zacl->z_ace_data;
1114 /*
1115 * Migrating back embedded?
1116 */
1117 if (zphys->zp_acl.z_acl_extern_obj) {
1118 error = dmu_object_free(zfsvfs->z_os,
1119 zp->z_phys->zp_acl.z_acl_extern_obj, tx);
1120 if (error)
1121 return (error);
1122 zphys->zp_acl.z_acl_extern_obj = 0;
1123 }
1124
1125 for (aclnode = list_head(&aclp->z_acl); aclnode;
1126 aclnode = list_next(&aclp->z_acl, aclnode)) {
1127 if (aclnode->z_ace_count == 0)
1128 continue;
1129 bcopy(aclnode->z_acldata, start, aclnode->z_size);
1130 start = (caddr_t)start + aclnode->z_size;
1131 }
1132 }
1133
1134 /*
1135 * If Old version then swap count/bytes to match old
1136 * layout of znode_acl_phys_t.
1137 */
1138 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
1139 zphys->zp_acl.z_acl_size = aclp->z_acl_count;
1140 zphys->zp_acl.z_acl_count = aclp->z_acl_bytes;
1141 } else {
1142 zphys->zp_acl.z_acl_size = aclp->z_acl_bytes;
1143 zphys->zp_acl.z_acl_count = aclp->z_acl_count;
1144 }
1145
1146 zphys->zp_acl.z_acl_version = aclp->z_version;
1147
1148 /*
1149 * Replace ACL wide bits, but first clear them.
1150 */
1151 zp->z_phys->zp_flags &= ~ZFS_ACL_WIDE_FLAGS;
1152
1153 zp->z_phys->zp_flags |= aclp->z_hints;
1154
1155 if (ace_trivial_common(aclp, 0, zfs_ace_walk) == 0)
1156 zp->z_phys->zp_flags |= ZFS_ACL_TRIVIAL;
1157
34dc7c2f
BB		 1158 return (0);
1159}
1160
1161/*
1162 * Update access mask for prepended ACE
1163 *
1164 * This applies the "groupmask" value for aclmode property.
1165 */
1166static void
1167zfs_acl_prepend_fixup(zfs_acl_t *aclp, void *acep, void *origacep,
1168 mode_t mode, uint64_t owner)
1169{
1170 int rmask, wmask, xmask;
1171 int user_ace;
1172 uint16_t aceflags;
1173 uint32_t origmask, acepmask;
1174 uint64_t fuid;
1175
1176 aceflags = aclp->z_ops.ace_flags_get(acep);
1177 fuid = aclp->z_ops.ace_who_get(acep);
1178 origmask = aclp->z_ops.ace_mask_get(origacep);
1179 acepmask = aclp->z_ops.ace_mask_get(acep);
1180
1181 user_ace = (!(aceflags &
1182 (ACE_OWNER|ACE_GROUP|ACE_IDENTIFIER_GROUP)));
1183
1184 if (user_ace && (fuid == owner)) {
1185 rmask = S_IRUSR;
1186 wmask = S_IWUSR;
1187 xmask = S_IXUSR;
1188 } else {
1189 rmask = S_IRGRP;
1190 wmask = S_IWGRP;
1191 xmask = S_IXGRP;
1192 }
1193
1194 if (origmask & ACE_READ_DATA) {
1195 if (mode & rmask) {
1196 acepmask &= ~ACE_READ_DATA;
1197 } else {
1198 acepmask |= ACE_READ_DATA;
1199 }
1200 }
1201
1202 if (origmask & ACE_WRITE_DATA) {
1203 if (mode & wmask) {
1204 acepmask &= ~ACE_WRITE_DATA;
1205 } else {
1206 acepmask |= ACE_WRITE_DATA;
1207 }
1208 }
1209
1210 if (origmask & ACE_APPEND_DATA) {
1211 if (mode & wmask) {
1212 acepmask &= ~ACE_APPEND_DATA;
1213 } else {
1214 acepmask |= ACE_APPEND_DATA;
1215 }
1216 }
1217
1218 if (origmask & ACE_EXECUTE) {
1219 if (mode & xmask) {
1220 acepmask &= ~ACE_EXECUTE;
1221 } else {
1222 acepmask |= ACE_EXECUTE;
1223 }
1224 }
1225 aclp->z_ops.ace_mask_set(acep, acepmask);
1226}
1227
1228/*
1229 * Apply mode to canonical six ACEs.
1230 */
1231static void
1232zfs_acl_fixup_canonical_six(zfs_acl_t *aclp, mode_t mode)
1233{
1234 zfs_acl_node_t *aclnode = list_tail(&aclp->z_acl);
1235 void *acep;
1236 int maskoff = aclp->z_ops.ace_mask_off();
1237 size_t abstract_size = aclp->z_ops.ace_abstract_size();
1238
1239 ASSERT(aclnode != NULL);
1240
1241 acep = (void *)((caddr_t)aclnode->z_acldata +
1242 aclnode->z_size - (abstract_size * 6));
1243
1244 /*
1245 * Fixup final ACEs to match the mode
1246 */
1247
1248 adjust_ace_pair_common(acep, maskoff, abstract_size,
1249 (mode & 0700) >> 6); /* owner@ */
1250
1251 acep = (caddr_t)acep + (abstract_size * 2);
1252
1253 adjust_ace_pair_common(acep, maskoff, abstract_size,
1254 (mode & 0070) >> 3); /* group@ */
1255
1256 acep = (caddr_t)acep + (abstract_size * 2);
1257 adjust_ace_pair_common(acep, maskoff,
1258 abstract_size, mode); /* everyone@ */
1259}
1260
1261
1262static int
1263zfs_acl_ace_match(zfs_acl_t *aclp, void *acep, int allow_deny,
1264 int entry_type, int accessmask)
1265{
1266 uint32_t mask = aclp->z_ops.ace_mask_get(acep);
1267 uint16_t type = aclp->z_ops.ace_type_get(acep);
1268 uint16_t flags = aclp->z_ops.ace_flags_get(acep);
1269
1270 return (mask == accessmask && type == allow_deny &&
1271 ((flags & ACE_TYPE_FLAGS) == entry_type));
1272}
1273
1274/*
1275 * Can prepended ACE be reused?
1276 */
1277static int
1278zfs_reuse_deny(zfs_acl_t *aclp, void *acep, void *prevacep)
1279{
1280 int okay_masks;
1281 uint16_t prevtype;
1282 uint16_t prevflags;
1283 uint16_t flags;
1284 uint32_t mask, prevmask;
1285
1286 if (prevacep == NULL)
1287 return (B_FALSE);
1288
1289 prevtype = aclp->z_ops.ace_type_get(prevacep);
1290 prevflags = aclp->z_ops.ace_flags_get(prevacep);
1291 flags = aclp->z_ops.ace_flags_get(acep);
1292 mask = aclp->z_ops.ace_mask_get(acep);
1293 prevmask = aclp->z_ops.ace_mask_get(prevacep);
1294
1295 if (prevtype != DENY)
1296 return (B_FALSE);
1297
1298 if (prevflags != (flags & ACE_IDENTIFIER_GROUP))
1299 return (B_FALSE);
1300
1301 okay_masks = (mask & OKAY_MASK_BITS);
1302
1303 if (prevmask & ~okay_masks)
1304 return (B_FALSE);
1305
1306 return (B_TRUE);
1307}
1308
1309
1310/*
1311 * Insert new ACL node into chain of zfs_acl_node_t's
1312 *
1313 * This will result in two possible results.
1314 * 1. If the ACL is currently just a single zfs_acl_node and
1315 * we are prepending the entry then current acl node will have
1316 * a new node inserted above it.
1317 *
1318 * 2. If we are inserting in the middle of current acl node then
1319 * the current node will be split in two and new node will be inserted
1320 * in between the two split nodes.
1321 */
1322static zfs_acl_node_t *
1323zfs_acl_ace_insert(zfs_acl_t *aclp, void *acep)
1324{
1325 zfs_acl_node_t *newnode;
1326 zfs_acl_node_t *trailernode = NULL;
1327 zfs_acl_node_t *currnode = zfs_acl_curr_node(aclp);
1328 int curr_idx = aclp->z_curr_node->z_ace_idx;
1329 int trailer_count;
1330 size_t oldsize;
1331
1332 newnode = zfs_acl_node_alloc(aclp->z_ops.ace_size(acep));
1333 newnode->z_ace_count = 1;
1334
1335 oldsize = currnode->z_size;
1336
1337 if (curr_idx != 1) {
1338 trailernode = zfs_acl_node_alloc(0);
1339 trailernode->z_acldata = acep;
1340
1341 trailer_count = currnode->z_ace_count - curr_idx + 1;
1342 currnode->z_ace_count = curr_idx - 1;
1343 currnode->z_size = (caddr_t)acep - (caddr_t)currnode->z_acldata;
1344 trailernode->z_size = oldsize - currnode->z_size;
1345 trailernode->z_ace_count = trailer_count;
1346 }
1347
1348 aclp->z_acl_count += 1;
1349 aclp->z_acl_bytes += aclp->z_ops.ace_size(acep);
1350
1351 if (curr_idx == 1)
1352 list_insert_before(&aclp->z_acl, currnode, newnode);
1353 else
1354 list_insert_after(&aclp->z_acl, currnode, newnode);
1355 if (trailernode) {
1356 list_insert_after(&aclp->z_acl, newnode, trailernode);
1357 aclp->z_curr_node = trailernode;
1358 trailernode->z_ace_idx = 1;
1359 }
1360
1361 return (newnode);
1362}
1363
1364/*
1365 * Prepend deny ACE
1366 */
1367static void *
9babb374 1368zfs_acl_prepend_deny(uint64_t uid, zfs_acl_t *aclp, void *acep,
34dc7c2f
BB		 1369 mode_t mode)
1370{
1371 zfs_acl_node_t *aclnode;
1372 void *newacep;
1373 uint64_t fuid;
1374 uint16_t flags;
1375
1376 aclnode = zfs_acl_ace_insert(aclp, acep);
1377 newacep = aclnode->z_acldata;
1378 fuid = aclp->z_ops.ace_who_get(acep);
1379 flags = aclp->z_ops.ace_flags_get(acep);
1380 zfs_set_ace(aclp, newacep, 0, DENY, fuid, (flags & ACE_TYPE_FLAGS));
9babb374 1381 zfs_acl_prepend_fixup(aclp, newacep, acep, mode, uid);
34dc7c2f
BB		 1382
1383 return (newacep);
1384}
1385
1386/*
1387 * Split an inherited ACE into inherit_only ACE
1388 * and original ACE with inheritance flags stripped off.
1389 */
1390static void
1391zfs_acl_split_ace(zfs_acl_t *aclp, zfs_ace_hdr_t *acep)
1392{
1393 zfs_acl_node_t *aclnode;
1394 zfs_acl_node_t *currnode;
1395 void *newacep;
1396 uint16_t type, flags;
1397 uint32_t mask;
1398 uint64_t fuid;
1399
1400 type = aclp->z_ops.ace_type_get(acep);
1401 flags = aclp->z_ops.ace_flags_get(acep);
1402 mask = aclp->z_ops.ace_mask_get(acep);
1403 fuid = aclp->z_ops.ace_who_get(acep);
1404
1405 aclnode = zfs_acl_ace_insert(aclp, acep);
1406 newacep = aclnode->z_acldata;
1407
1408 aclp->z_ops.ace_type_set(newacep, type);
1409 aclp->z_ops.ace_flags_set(newacep, flags | ACE_INHERIT_ONLY_ACE);
1410 aclp->z_ops.ace_mask_set(newacep, mask);
1411 aclp->z_ops.ace_type_set(newacep, type);
1412 aclp->z_ops.ace_who_set(newacep, fuid);
1413 aclp->z_next_ace = acep;
1414 flags &= ~ALL_INHERIT;
1415 aclp->z_ops.ace_flags_set(acep, flags);
1416 currnode = zfs_acl_curr_node(aclp);
1417 ASSERT(currnode->z_ace_idx >= 1);
1418 currnode->z_ace_idx -= 1;
1419}
1420
1421/*
1422 * Are ACES started at index i, the canonical six ACES?
1423 */
1424static int
1425zfs_have_canonical_six(zfs_acl_t *aclp)
1426{
1427 void *acep;
1428 zfs_acl_node_t *aclnode = list_tail(&aclp->z_acl);
1429 int i = 0;
1430 size_t abstract_size = aclp->z_ops.ace_abstract_size();
1431
1432 ASSERT(aclnode != NULL);
1433
1434 if (aclnode->z_ace_count < 6)
1435 return (0);
1436
1437 acep = (void *)((caddr_t)aclnode->z_acldata +
1438 aclnode->z_size - (aclp->z_ops.ace_abstract_size() * 6));
1439
1440 if ((zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
1441 DENY, ACE_OWNER, 0) &&
1442 zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
1443 ALLOW, ACE_OWNER, OWNER_ALLOW_MASK) &&
1444 zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++), DENY,
1445 OWNING_GROUP, 0) && zfs_acl_ace_match(aclp, (caddr_t)acep +
1446 (abstract_size * i++),
1447 ALLOW, OWNING_GROUP, 0) &&
1448 zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
1449 DENY, ACE_EVERYONE, EVERYONE_DENY_MASK) &&
1450 zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
1451 ALLOW, ACE_EVERYONE, EVERYONE_ALLOW_MASK))) {
1452 return (1);
1453 } else {
1454 return (0);
1455 }
1456}
1457
1458
1459/*
1460 * Apply step 1g, to group entries
1461 *
1462 * Need to deal with corner case where group may have
1463 * greater permissions than owner. If so then limit
1464 * group permissions, based on what extra permissions
1465 * group has.
1466 */
1467static void
1468zfs_fixup_group_entries(zfs_acl_t *aclp, void *acep, void *prevacep,
1469 mode_t mode)
1470{
1471 uint32_t prevmask = aclp->z_ops.ace_mask_get(prevacep);
1472 uint32_t mask = aclp->z_ops.ace_mask_get(acep);
1473 uint16_t prevflags = aclp->z_ops.ace_flags_get(prevacep);
1474 mode_t extramode = (mode >> 3) & 07;
1475 mode_t ownermode = (mode >> 6);
1476
1477 if (prevflags & ACE_IDENTIFIER_GROUP) {
1478
1479 extramode &= ~ownermode;
1480
1481 if (extramode) {
1482 if (extramode & S_IROTH) {
1483 prevmask &= ~ACE_READ_DATA;
1484 mask &= ~ACE_READ_DATA;
1485 }
1486 if (extramode & S_IWOTH) {
1487 prevmask &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
1488 mask &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
1489 }
1490 if (extramode & S_IXOTH) {
1491 prevmask &= ~ACE_EXECUTE;
1492 mask &= ~ACE_EXECUTE;
1493 }
1494 }
1495 }
1496 aclp->z_ops.ace_mask_set(acep, mask);
1497 aclp->z_ops.ace_mask_set(prevacep, prevmask);
1498}
1499
1500/*
1501 * Apply the chmod algorithm as described
1502 * in PSARC/2002/240
1503 */
1504static void
9babb374
BB		 1505zfs_acl_chmod(zfsvfs_t *zfsvfs, uint64_t uid,
1506 uint64_t mode, zfs_acl_t *aclp)
34dc7c2f 1507{
34dc7c2f
BB		 1508 void *acep = NULL, *prevacep = NULL;
1509 uint64_t who;
1510 int i;
1511 int entry_type;
1512 int reuse_deny;
1513 int need_canonical_six = 1;
1514 uint16_t iflags, type;
1515 uint32_t access_mask;
1516
34dc7c2f
BB		 1517 /*
1518 * If discard then just discard all ACL nodes which
1519 * represent the ACEs.
1520 *
1521 * New owner@/group@/everone@ ACEs will be added
1522 * later.
1523 */
1524 if (zfsvfs->z_acl_mode == ZFS_ACL_DISCARD)
1525 zfs_acl_release_nodes(aclp);
1526
1527 while (acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
1528 &iflags, &type)) {
1529
1530 entry_type = (iflags & ACE_TYPE_FLAGS);
1531 iflags = (iflags & ALL_INHERIT);
1532
1533 if ((type != ALLOW && type != DENY) ||
1534 (iflags & ACE_INHERIT_ONLY_ACE)) {
1535 if (iflags)
1536 aclp->z_hints |= ZFS_INHERIT_ACE;
1537 switch (type) {
1538 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1539 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1540 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1541 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
1542 aclp->z_hints |= ZFS_ACL_OBJ_ACE;
1543 break;
1544 }
1545 goto nextace;
1546 }
1547
1548 /*
1549 * Need to split ace into two?
1550 */
1551 if ((iflags & (ACE_FILE_INHERIT_ACE|
1552 ACE_DIRECTORY_INHERIT_ACE)) &&
1553 (!(iflags & ACE_INHERIT_ONLY_ACE))) {
1554 zfs_acl_split_ace(aclp, acep);
1555 aclp->z_hints |= ZFS_INHERIT_ACE;
1556 goto nextace;
1557 }
1558
1559 if (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
1560 (entry_type == OWNING_GROUP)) {
1561 access_mask &= ~OGE_CLEAR;
1562 aclp->z_ops.ace_mask_set(acep, access_mask);
1563 goto nextace;
1564 } else {
1565 reuse_deny = B_TRUE;
1566 if (type == ALLOW) {
1567
1568 /*
1569 * Check preceding ACE if any, to see
1570 * if we need to prepend a DENY ACE.
1571 * This is only applicable when the acl_mode
1572 * property == groupmask.
1573 */
1574 if (zfsvfs->z_acl_mode == ZFS_ACL_GROUPMASK) {
1575
1576 reuse_deny = zfs_reuse_deny(aclp, acep,
1577 prevacep);
1578
1579 if (!reuse_deny) {
1580 prevacep =
9babb374 1581 zfs_acl_prepend_deny(uid,
34dc7c2f
BB		 1582 aclp, acep, mode);
1583 } else {
1584 zfs_acl_prepend_fixup(
1585 aclp, prevacep,
9babb374 1586 acep, mode, uid);
34dc7c2f
BB		 1587 }
1588 zfs_fixup_group_entries(aclp, acep,
1589 prevacep, mode);
34dc7c2f
BB		 1590 }
1591 }
1592 }
1593nextace:
1594 prevacep = acep;
1595 }
1596
1597 /*
1598 * Check out last six aces, if we have six.
1599 */
1600
1601 if (aclp->z_acl_count >= 6) {
1602 if (zfs_have_canonical_six(aclp)) {
1603 need_canonical_six = 0;
1604 }
1605 }
1606
1607 if (need_canonical_six) {
1608 size_t abstract_size = aclp->z_ops.ace_abstract_size();
1609 void *zacep;
1610 zfs_acl_node_t *aclnode =
1611 zfs_acl_node_alloc(abstract_size * 6);
1612
1613 aclnode->z_size = abstract_size * 6;
1614 aclnode->z_ace_count = 6;
1615 aclp->z_acl_bytes += aclnode->z_size;
1616 list_insert_tail(&aclp->z_acl, aclnode);
1617
1618 zacep = aclnode->z_acldata;
1619
1620 i = 0;
1621 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
1622 0, DENY, -1, ACE_OWNER);
1623 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
1624 OWNER_ALLOW_MASK, ALLOW, -1, ACE_OWNER);
1625 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++), 0,
1626 DENY, -1, OWNING_GROUP);
1627 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++), 0,
1628 ALLOW, -1, OWNING_GROUP);
1629 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
1630 EVERYONE_DENY_MASK, DENY, -1, ACE_EVERYONE);
1631 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
1632 EVERYONE_ALLOW_MASK, ALLOW, -1, ACE_EVERYONE);
1633 aclp->z_acl_count += 6;
1634 }
1635
1636 zfs_acl_fixup_canonical_six(aclp, mode);
1637}
1638
1639int
1640zfs_acl_chmod_setattr(znode_t *zp, zfs_acl_t **aclp, uint64_t mode)
1641{
1642 int error;
1643
1644 mutex_enter(&zp->z_lock);
1645 mutex_enter(&zp->z_acl_lock);
1646 *aclp = NULL;
1647 error = zfs_acl_node_read(zp, aclp, B_TRUE);
9babb374
BB		 1648 if (error == 0) {
1649 (*aclp)->z_hints = zp->z_phys->zp_flags & V4_ACL_WIDE_FLAGS;
1650 zfs_acl_chmod(zp->z_zfsvfs, zp->z_phys->zp_uid, mode, *aclp);
1651 }
34dc7c2f
BB		 1652 mutex_exit(&zp->z_acl_lock);
1653 mutex_exit(&zp->z_lock);
1654 return (error);
1655}
1656
1657/*
1658 * strip off write_owner and write_acl
1659 */
1660static void
1661zfs_restricted_update(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, void *acep)
1662{
1663 uint32_t mask = aclp->z_ops.ace_mask_get(acep);
1664
1665 if ((zfsvfs->z_acl_inherit == ZFS_ACL_RESTRICTED) &&
1666 (aclp->z_ops.ace_type_get(acep) == ALLOW)) {
1667 mask &= ~RESTRICTED_CLEAR;
1668 aclp->z_ops.ace_mask_set(acep, mask);
1669 }
1670}
1671
1672/*
1673 * Should ACE be inherited?
1674 */
1675static int
9babb374 1676zfs_ace_can_use(vtype_t vtype, uint16_t acep_flags)
34dc7c2f 1677{
34dc7c2f
BB		 1678 int iflags = (acep_flags & 0xf);
1679
1680 if ((vtype == VDIR) && (iflags & ACE_DIRECTORY_INHERIT_ACE))
1681 return (1);
1682 else if (iflags & ACE_FILE_INHERIT_ACE)
1683 return (!((vtype == VDIR) &&
1684 (iflags & ACE_NO_PROPAGATE_INHERIT_ACE)));
1685 return (0);
1686}
1687
1688/*
1689 * inherit inheritable ACEs from parent
1690 */
1691static zfs_acl_t *
9babb374
BB		 1692zfs_acl_inherit(zfsvfs_t *zfsvfs, vtype_t vtype, zfs_acl_t *paclp,
1693 uint64_t mode, boolean_t *need_chmod)
34dc7c2f 1694{
34dc7c2f
BB		 1695 void *pacep;
1696 void *acep, *acep2;
1697 zfs_acl_node_t *aclnode, *aclnode2;
1698 zfs_acl_t *aclp = NULL;
1699 uint64_t who;
1700 uint32_t access_mask;
1701 uint16_t iflags, newflags, type;
1702 size_t ace_size;
1703 void *data1, *data2;
1704 size_t data1sz, data2sz;
9babb374
BB		 1705 boolean_t vdir = vtype == VDIR;
1706 boolean_t vreg = vtype == VREG;
b128c09f
BB		 1707 boolean_t passthrough, passthrough_x, noallow;
1708
1709 passthrough_x =
1710 zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH_X;
1711 passthrough = passthrough_x ||
1712 zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH;
1713 noallow =
1714 zfsvfs->z_acl_inherit == ZFS_ACL_NOALLOW;
34dc7c2f
BB		 1715
1716 *need_chmod = B_TRUE;
1717 pacep = NULL;
b128c09f
BB		 1718 aclp = zfs_acl_alloc(paclp->z_version);
1719 if (zfsvfs->z_acl_inherit == ZFS_ACL_DISCARD)
1720 return (aclp);
1721 while (pacep = zfs_acl_next_ace(paclp, pacep, &who,
1722 &access_mask, &iflags, &type)) {
34dc7c2f 1723
b128c09f
BB		 1724 /*
1725 * don't inherit bogus ACEs
1726 */
1727 if (!zfs_acl_valid_ace_type(type, iflags))
1728 continue;
34dc7c2f 1729
b128c09f
BB		 1730 if (noallow && type == ALLOW)
1731 continue;
34dc7c2f 1732
b128c09f 1733 ace_size = aclp->z_ops.ace_size(pacep);
34dc7c2f 1734
9babb374 1735 if (!zfs_ace_can_use(vtype, iflags))
b128c09f
BB		 1736 continue;
1737
1738 /*
1739 * If owner@, group@, or everyone@ inheritable
1740 * then zfs_acl_chmod() isn't needed.
1741 */
1742 if (passthrough &&
1743 ((iflags & (ACE_OWNER|ACE_EVERYONE)) ||
1744 ((iflags & OWNING_GROUP) ==
1745 OWNING_GROUP)) && (vreg || (vdir && (iflags &
1746 ACE_DIRECTORY_INHERIT_ACE)))) {
1747 *need_chmod = B_FALSE;
1748
1749 if (!vdir && passthrough_x &&
1750 ((mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0)) {
1751 access_mask &= ~ACE_EXECUTE;
1752 }
1753 }
1754
1755 aclnode = zfs_acl_node_alloc(ace_size);
1756 list_insert_tail(&aclp->z_acl, aclnode);
1757 acep = aclnode->z_acldata;
1758
1759 zfs_set_ace(aclp, acep, access_mask, type,
1760 who, iflags|ACE_INHERITED_ACE);
1761
1762 /*
1763 * Copy special opaque data if any
1764 */
1765 if ((data1sz = paclp->z_ops.ace_data(pacep, &data1)) != 0) {
1766 VERIFY((data2sz = aclp->z_ops.ace_data(acep,
1767 &data2)) == data1sz);
1768 bcopy(data1, data2, data2sz);
1769 }
1770 aclp->z_acl_count++;
1771 aclnode->z_ace_count++;
1772 aclp->z_acl_bytes += aclnode->z_size;
1773 newflags = aclp->z_ops.ace_flags_get(acep);
1774
1775 if (vdir)
1776 aclp->z_hints |= ZFS_INHERIT_ACE;
1777
1778 if ((iflags & ACE_NO_PROPAGATE_INHERIT_ACE) || !vdir) {
1779 newflags &= ~ALL_INHERIT;
1780 aclp->z_ops.ace_flags_set(acep,
1781 newflags|ACE_INHERITED_ACE);
1782 zfs_restricted_update(zfsvfs, aclp, acep);
1783 continue;
1784 }
1785
1786 ASSERT(vdir);
1787
1788 newflags = aclp->z_ops.ace_flags_get(acep);
1789 if ((iflags & (ACE_FILE_INHERIT_ACE |
1790 ACE_DIRECTORY_INHERIT_ACE)) !=
1791 ACE_FILE_INHERIT_ACE) {
1792 aclnode2 = zfs_acl_node_alloc(ace_size);
1793 list_insert_tail(&aclp->z_acl, aclnode2);
1794 acep2 = aclnode2->z_acldata;
1795 zfs_set_ace(aclp, acep2,
1796 access_mask, type, who,
1797 iflags|ACE_INHERITED_ACE);
1798 newflags |= ACE_INHERIT_ONLY_ACE;
1799 aclp->z_ops.ace_flags_set(acep, newflags);
1800 newflags &= ~ALL_INHERIT;
1801 aclp->z_ops.ace_flags_set(acep2,
1802 newflags|ACE_INHERITED_ACE);
34dc7c2f
BB		 1803
1804 /*
1805 * Copy special opaque data if any
1806 */
b128c09f 1807 if ((data1sz = aclp->z_ops.ace_data(acep,
34dc7c2f 1808 &data1)) != 0) {
b128c09f
BB		 1809 VERIFY((data2sz =
1810 aclp->z_ops.ace_data(acep2,
34dc7c2f 1811 &data2)) == data1sz);
b128c09f 1812 bcopy(data1, data2, data1sz);
34dc7c2f
BB		 1813 }
1814 aclp->z_acl_count++;
b128c09f 1815 aclnode2->z_ace_count++;
34dc7c2f 1816 aclp->z_acl_bytes += aclnode->z_size;
b128c09f
BB		 1817 zfs_restricted_update(zfsvfs, aclp, acep2);
1818 } else {
1819 newflags |= ACE_INHERIT_ONLY_ACE;
1820 aclp->z_ops.ace_flags_set(acep,
1821 newflags|ACE_INHERITED_ACE);
34dc7c2f
BB		 1822 }
1823 }
1824 return (aclp);
1825}
1826
1827/*
1828 * Create file system object initial permissions
1829 * including inheritable ACEs.
1830 */
9babb374
BB		 1831int
1832zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
1833 vsecattr_t *vsecp, zfs_acl_ids_t *acl_ids)
34dc7c2f 1834{
34dc7c2f 1835 int error;
9babb374 1836 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
34dc7c2f 1837 zfs_acl_t *paclp;
34dc7c2f
BB		 1838 gid_t gid;
1839 boolean_t need_chmod = B_TRUE;
1840
9babb374
BB		 1841 bzero(acl_ids, sizeof (zfs_acl_ids_t));
1842 acl_ids->z_mode = MAKEIMODE(vap->va_type, vap->va_mode);
34dc7c2f 1843
9babb374
BB		 1844 if (vsecp)
1845 if ((error = zfs_vsec_2_aclp(zfsvfs, vap->va_type, vsecp, cr,
1846 &acl_ids->z_fuidp, &acl_ids->z_aclp)) != 0)
1847 return (error);
34dc7c2f
BB		 1848
1849 /*
1850 * Determine uid and gid.
1851 */
1852 if ((flag & (IS_ROOT_NODE | IS_REPLAY)) ||
1853 ((flag & IS_XATTR) && (vap->va_type == VDIR))) {
9babb374
BB		 1854 acl_ids->z_fuid = zfs_fuid_create(zfsvfs,
1855 (uint64_t)vap->va_uid, cr,
1856 ZFS_OWNER, &acl_ids->z_fuidp);
1857 acl_ids->z_fgid = zfs_fuid_create(zfsvfs,
1858 (uint64_t)vap->va_gid, cr,
1859 ZFS_GROUP, &acl_ids->z_fuidp);
34dc7c2f
BB		 1860 gid = vap->va_gid;
1861 } else {
9babb374
BB		 1862 acl_ids->z_fuid = zfs_fuid_create_cred(zfsvfs, ZFS_OWNER,
1863 cr, &acl_ids->z_fuidp);
1864 acl_ids->z_fgid = 0;
34dc7c2f 1865 if (vap->va_mask & AT_GID) {
9babb374
BB		 1866 acl_ids->z_fgid = zfs_fuid_create(zfsvfs,
1867 (uint64_t)vap->va_gid,
1868 cr, ZFS_GROUP, &acl_ids->z_fuidp);
34dc7c2f 1869 gid = vap->va_gid;
9babb374 1870 if (acl_ids->z_fgid != dzp->z_phys->zp_gid &&
34dc7c2f
BB		 1871 !groupmember(vap->va_gid, cr) &&
1872 secpolicy_vnode_create_gid(cr) != 0)
9babb374 1873 acl_ids->z_fgid = 0;
34dc7c2f 1874 }
9babb374
BB		 1875 if (acl_ids->z_fgid == 0) {
1876 if (dzp->z_phys->zp_mode & S_ISGID) {
1877 acl_ids->z_fgid = dzp->z_phys->zp_gid;
1878 gid = zfs_fuid_map_id(zfsvfs, acl_ids->z_fgid,
34dc7c2f
BB		 1879 cr, ZFS_GROUP);
1880 } else {
9babb374
BB		 1881 acl_ids->z_fgid = zfs_fuid_create_cred(zfsvfs,
1882 ZFS_GROUP, cr, &acl_ids->z_fuidp);
34dc7c2f
BB		 1883 gid = crgetgid(cr);
1884 }
1885 }
1886 }
1887
1888 /*
1889 * If we're creating a directory, and the parent directory has the
1890 * set-GID bit set, set in on the new directory.
1891 * Otherwise, if the user is neither privileged nor a member of the
1892 * file's new group, clear the file's set-GID bit.
1893 */
1894
9babb374
BB		 1895 if (!(flag & IS_ROOT_NODE) && (dzp->z_phys->zp_mode & S_ISGID) &&
1896 (vap->va_type == VDIR)) {
1897 acl_ids->z_mode |= S_ISGID;
34dc7c2f 1898 } else {
9babb374 1899 if ((acl_ids->z_mode & S_ISGID) &&
34dc7c2f 1900 secpolicy_vnode_setids_setgids(cr, gid) != 0)
9babb374 1901 acl_ids->z_mode &= ~S_ISGID;
34dc7c2f
BB		 1902 }
1903
9babb374
BB		 1904 if (acl_ids->z_aclp == NULL) {
1905 mutex_enter(&dzp->z_lock);
1906 if (!(flag & IS_ROOT_NODE) && (ZTOV(dzp)->v_type == VDIR &&
1907 (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE)) &&
1908 !(dzp->z_phys->zp_flags & ZFS_XATTR)) {
1909 mutex_enter(&dzp->z_acl_lock);
1910 VERIFY(0 == zfs_acl_node_read(dzp, &paclp, B_FALSE));
1911 mutex_exit(&dzp->z_acl_lock);
1912 acl_ids->z_aclp = zfs_acl_inherit(zfsvfs,
1913 vap->va_type, paclp, acl_ids->z_mode, &need_chmod);
34dc7c2f 1914 } else {
9babb374
BB		 1915 acl_ids->z_aclp =
1916 zfs_acl_alloc(zfs_acl_version_zp(dzp));
1917 }
1918 mutex_exit(&dzp->z_lock);
1919 if (need_chmod) {
1920 acl_ids->z_aclp->z_hints = (vap->va_type == VDIR) ?
1921 ZFS_ACL_AUTO_INHERIT : 0;
1922 zfs_acl_chmod(zfsvfs, acl_ids->z_fuid,
1923 acl_ids->z_mode, acl_ids->z_aclp);
34dc7c2f 1924 }
34dc7c2f
BB		 1925 }
1926
9babb374
BB		 1927 return (0);
1928}
34dc7c2f 1929
9babb374
BB		 1930/*
1931 * Free ACL and fuid_infop, but not the acl_ids structure
1932 */
1933void
1934zfs_acl_ids_free(zfs_acl_ids_t *acl_ids)
1935{
1936 if (acl_ids->z_aclp)
1937 zfs_acl_free(acl_ids->z_aclp);
1938 if (acl_ids->z_fuidp)
1939 zfs_fuid_info_free(acl_ids->z_fuidp);
1940 acl_ids->z_aclp = NULL;
1941 acl_ids->z_fuidp = NULL;
1942}
34dc7c2f 1943
9babb374
BB		 1944boolean_t
1945zfs_acl_ids_overquota(zfsvfs_t *zfsvfs, zfs_acl_ids_t *acl_ids)
1946{
1947 return (zfs_usergroup_overquota(zfsvfs, B_FALSE, acl_ids->z_fuid) ||
1948 zfs_usergroup_overquota(zfsvfs, B_TRUE, acl_ids->z_fgid));
34dc7c2f
BB		 1949}
1950
1951/*
1952 * Retrieve a files ACL
1953 */
1954int
1955zfs_getacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
1956{
1957 zfs_acl_t *aclp;
1958 ulong_t mask;
1959 int error;
1960 int count = 0;
1961 int largeace = 0;
1962
1963 mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT |
1964 VSA_ACE_ACLFLAGS | VSA_ACE_ALLTYPES);
1965
1966 if (error = zfs_zaccess(zp, ACE_READ_ACL, 0, skipaclchk, cr))
1967 return (error);
1968
1969 if (mask == 0)
1970 return (ENOSYS);
1971
1972 mutex_enter(&zp->z_acl_lock);
1973
1974 error = zfs_acl_node_read(zp, &aclp, B_FALSE);
1975 if (error != 0) {
1976 mutex_exit(&zp->z_acl_lock);
1977 return (error);
1978 }
1979
1980 /*
1981 * Scan ACL to determine number of ACEs
1982 */
1983 if ((zp->z_phys->zp_flags & ZFS_ACL_OBJ_ACE) &&
1984 !(mask & VSA_ACE_ALLTYPES)) {
1985 void *zacep = NULL;
1986 uint64_t who;
1987 uint32_t access_mask;
1988 uint16_t type, iflags;
1989
1990 while (zacep = zfs_acl_next_ace(aclp, zacep,
1991 &who, &access_mask, &iflags, &type)) {
1992 switch (type) {
1993 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1994 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1995 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1996 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
1997 largeace++;
1998 continue;
1999 default:
2000 count++;
2001 }
2002 }
2003 vsecp->vsa_aclcnt = count;
2004 } else
2005 count = aclp->z_acl_count;
2006
2007 if (mask & VSA_ACECNT) {
2008 vsecp->vsa_aclcnt = count;
2009 }
2010
2011 if (mask & VSA_ACE) {
2012 size_t aclsz;
2013
2014 zfs_acl_node_t *aclnode = list_head(&aclp->z_acl);
2015
2016 aclsz = count * sizeof (ace_t) +
2017 sizeof (ace_object_t) * largeace;
2018
2019 vsecp->vsa_aclentp = kmem_alloc(aclsz, KM_SLEEP);
2020 vsecp->vsa_aclentsz = aclsz;
2021
2022 if (aclp->z_version == ZFS_ACL_VERSION_FUID)
2023 zfs_copy_fuid_2_ace(zp->z_zfsvfs, aclp, cr,
2024 vsecp->vsa_aclentp, !(mask & VSA_ACE_ALLTYPES));
2025 else {
2026 bcopy(aclnode->z_acldata, vsecp->vsa_aclentp,
2027 count * sizeof (ace_t));
2028 }
2029 }
2030 if (mask & VSA_ACE_ACLFLAGS) {
2031 vsecp->vsa_aclflags = 0;
2032 if (zp->z_phys->zp_flags & ZFS_ACL_DEFAULTED)
2033 vsecp->vsa_aclflags |= ACL_DEFAULTED;
2034 if (zp->z_phys->zp_flags & ZFS_ACL_PROTECTED)
2035 vsecp->vsa_aclflags |= ACL_PROTECTED;
2036 if (zp->z_phys->zp_flags & ZFS_ACL_AUTO_INHERIT)
2037 vsecp->vsa_aclflags |= ACL_AUTO_INHERIT;
2038 }
2039
2040 mutex_exit(&zp->z_acl_lock);
2041
34dc7c2f
BB		 2042 return (0);
2043}
2044
2045int
2046zfs_vsec_2_aclp(zfsvfs_t *zfsvfs, vtype_t obj_type,
9babb374 2047 vsecattr_t *vsecp, cred_t *cr, zfs_fuid_info_t **fuidp, zfs_acl_t **zaclp)
34dc7c2f
BB		 2048{
2049 zfs_acl_t *aclp;
2050 zfs_acl_node_t *aclnode;
2051 int aclcnt = vsecp->vsa_aclcnt;
2052 int error;
2053
2054 if (vsecp->vsa_aclcnt > MAX_ACL_ENTRIES || vsecp->vsa_aclcnt <= 0)
2055 return (EINVAL);
2056
2057 aclp = zfs_acl_alloc(zfs_acl_version(zfsvfs->z_version));
2058
2059 aclp->z_hints = 0;
2060 aclnode = zfs_acl_node_alloc(aclcnt * sizeof (zfs_object_ace_t));
2061 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
2062 if ((error = zfs_copy_ace_2_oldace(obj_type, aclp,
2063 (ace_t *)vsecp->vsa_aclentp, aclnode->z_acldata,
2064 aclcnt, &aclnode->z_size)) != 0) {
2065 zfs_acl_free(aclp);
2066 zfs_acl_node_free(aclnode);
2067 return (error);
2068 }
2069 } else {
9babb374 2070 if ((error = zfs_copy_ace_2_fuid(zfsvfs, obj_type, aclp,
34dc7c2f 2071 vsecp->vsa_aclentp, aclnode->z_acldata, aclcnt,
9babb374 2072 &aclnode->z_size, fuidp, cr)) != 0) {
34dc7c2f
BB		 2073 zfs_acl_free(aclp);
2074 zfs_acl_node_free(aclnode);
2075 return (error);
2076 }
2077 }
2078 aclp->z_acl_bytes = aclnode->z_size;
2079 aclnode->z_ace_count = aclcnt;
2080 aclp->z_acl_count = aclcnt;
2081 list_insert_head(&aclp->z_acl, aclnode);
2082
2083 /*
2084 * If flags are being set then add them to z_hints
2085 */
2086 if (vsecp->vsa_mask & VSA_ACE_ACLFLAGS) {
2087 if (vsecp->vsa_aclflags & ACL_PROTECTED)
2088 aclp->z_hints |= ZFS_ACL_PROTECTED;
2089 if (vsecp->vsa_aclflags & ACL_DEFAULTED)
2090 aclp->z_hints |= ZFS_ACL_DEFAULTED;
2091 if (vsecp->vsa_aclflags & ACL_AUTO_INHERIT)
2092 aclp->z_hints |= ZFS_ACL_AUTO_INHERIT;
2093 }
2094
2095 *zaclp = aclp;
2096
2097 return (0);
2098}
2099
2100/*
2101 * Set a files ACL
2102 */
2103int
2104zfs_setacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
2105{
2106 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2107 zilog_t *zilog = zfsvfs->z_log;
2108 ulong_t mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT);
2109 dmu_tx_t *tx;
2110 int error;
2111 zfs_acl_t *aclp;
2112 zfs_fuid_info_t *fuidp = NULL;
9babb374 2113 boolean_t fuid_dirtied;
34dc7c2f
BB		 2114
2115 if (mask == 0)
2116 return (ENOSYS);
2117
2118 if (zp->z_phys->zp_flags & ZFS_IMMUTABLE)
2119 return (EPERM);
2120
2121 if (error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr))
2122 return (error);
2123
9babb374
BB		 2124 error = zfs_vsec_2_aclp(zfsvfs, ZTOV(zp)->v_type, vsecp, cr, &fuidp,
2125 &aclp);
34dc7c2f
BB		 2126 if (error)
2127 return (error);
2128
2129 /*
2130 * If ACL wide flags aren't being set then preserve any
2131 * existing flags.
2132 */
2133 if (!(vsecp->vsa_mask & VSA_ACE_ACLFLAGS)) {
2134 aclp->z_hints |= (zp->z_phys->zp_flags & V4_ACL_WIDE_FLAGS);
2135 }
2136top:
34dc7c2f
BB		 2137 mutex_enter(&zp->z_lock);
2138 mutex_enter(&zp->z_acl_lock);
2139
2140 tx = dmu_tx_create(zfsvfs->z_os);
2141 dmu_tx_hold_bonus(tx, zp->z_id);
2142
2143 if (zp->z_phys->zp_acl.z_acl_extern_obj) {
2144 /* Are we upgrading ACL? */
2145 if (zfsvfs->z_version <= ZPL_VERSION_FUID &&
2146 zp->z_phys->zp_acl.z_acl_version ==
2147 ZFS_ACL_VERSION_INITIAL) {
2148 dmu_tx_hold_free(tx,
2149 zp->z_phys->zp_acl.z_acl_extern_obj,
2150 0, DMU_OBJECT_END);
2151 dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
2152 0, aclp->z_acl_bytes);
2153 } else {
2154 dmu_tx_hold_write(tx,
2155 zp->z_phys->zp_acl.z_acl_extern_obj,
2156 0, aclp->z_acl_bytes);
2157 }
2158 } else if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
2159 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, aclp->z_acl_bytes);
2160 }
9babb374
BB		 2161 fuid_dirtied = zfsvfs->z_fuid_dirty;
2162 if (fuid_dirtied)
2163 zfs_fuid_txhold(zfsvfs, tx);
34dc7c2f 2164
fb5f0bc8 2165 error = dmu_tx_assign(tx, TXG_NOWAIT);
34dc7c2f
BB		 2166 if (error) {
2167 mutex_exit(&zp->z_acl_lock);
2168 mutex_exit(&zp->z_lock);
2169
fb5f0bc8 2170 if (error == ERESTART) {
34dc7c2f
BB		 2171 dmu_tx_wait(tx);
2172 dmu_tx_abort(tx);
2173 goto top;
2174 }
2175 dmu_tx_abort(tx);
2176 zfs_acl_free(aclp);
2177 return (error);
2178 }
2179
9babb374 2180 error = zfs_aclset_common(zp, aclp, cr, tx);
34dc7c2f 2181 ASSERT(error == 0);
45d1cae3 2182 zp->z_acl_cached = aclp;
34dc7c2f 2183
9babb374
BB		 2184 if (fuid_dirtied)
2185 zfs_fuid_sync(zfsvfs, tx);
2186
2187 zfs_time_stamper_locked(zp, STATE_CHANGED, tx);
34dc7c2f
BB		 2188 zfs_log_acl(zilog, tx, zp, vsecp, fuidp);
2189
2190 if (fuidp)
2191 zfs_fuid_info_free(fuidp);
34dc7c2f
BB		 2192 dmu_tx_commit(tx);
2193done:
2194 mutex_exit(&zp->z_acl_lock);
2195 mutex_exit(&zp->z_lock);
2196
2197 return (error);
2198}
2199
2200/*
9babb374
BB		 2201 * Check accesses of interest (AoI) against attributes of the dataset
2202 * such as read-only. Returns zero if no AoI conflict with dataset
2203 * attributes, otherwise an appropriate errno is returned.
34dc7c2f
BB		 2204 */
2205static int
9babb374 2206zfs_zaccess_dataset_check(znode_t *zp, uint32_t v4_mode)
34dc7c2f 2207{
34dc7c2f
BB		 2208 if ((v4_mode & WRITE_MASK) &&
2209 (zp->z_zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) &&
9babb374
BB		 2210 (!IS_DEVVP(ZTOV(zp)) ||
2211 (IS_DEVVP(ZTOV(zp)) && (v4_mode & WRITE_MASK_ATTRS)))) {
34dc7c2f
BB		 2212 return (EROFS);
2213 }
2214
2215 /*
2216 * Only check for READONLY on non-directories.
2217 */
2218 if ((v4_mode & WRITE_MASK_DATA) &&
2219 (((ZTOV(zp)->v_type != VDIR) &&
2220 (zp->z_phys->zp_flags & (ZFS_READONLY | ZFS_IMMUTABLE))) ||
2221 (ZTOV(zp)->v_type == VDIR &&
2222 (zp->z_phys->zp_flags & ZFS_IMMUTABLE)))) {
34dc7c2f
BB		 2223 return (EPERM);
2224 }
2225
2226 if ((v4_mode & (ACE_DELETE | ACE_DELETE_CHILD)) &&
2227 (zp->z_phys->zp_flags & ZFS_NOUNLINK)) {
34dc7c2f
BB		 2228 return (EPERM);
2229 }
2230
2231 if (((v4_mode & (ACE_READ_DATA|ACE_EXECUTE)) &&
2232 (zp->z_phys->zp_flags & ZFS_AV_QUARANTINED))) {
34dc7c2f
BB		 2233 return (EACCES);
2234 }
2235
9babb374
BB		 2236 return (0);
2237}
2238
2239/*
2240 * The primary usage of this function is to loop through all of the
2241 * ACEs in the znode, determining what accesses of interest (AoI) to
2242 * the caller are allowed or denied. The AoI are expressed as bits in
2243 * the working_mode parameter. As each ACE is processed, bits covered
2244 * by that ACE are removed from the working_mode. This removal
2245 * facilitates two things. The first is that when the working mode is
2246 * empty (= 0), we know we've looked at all the AoI. The second is
2247 * that the ACE interpretation rules don't allow a later ACE to undo
2248 * something granted or denied by an earlier ACE. Removing the
2249 * discovered access or denial enforces this rule. At the end of
2250 * processing the ACEs, all AoI that were found to be denied are
2251 * placed into the working_mode, giving the caller a mask of denied
2252 * accesses. Returns:
2253 * 0 if all AoI granted
2254 * EACCESS if the denied mask is non-zero
2255 * other error if abnormal failure (e.g., IO error)
2256 *
2257 * A secondary usage of the function is to determine if any of the
2258 * AoI are granted. If an ACE grants any access in
2259 * the working_mode, we immediately short circuit out of the function.
2260 * This mode is chosen by setting anyaccess to B_TRUE. The
2261 * working_mode is not a denied access mask upon exit if the function
2262 * is used in this manner.
2263 */
2264static int
2265zfs_zaccess_aces_check(znode_t *zp, uint32_t *working_mode,
2266 boolean_t anyaccess, cred_t *cr)
2267{
2268 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2269 zfs_acl_t *aclp;
2270 int error;
2271 uid_t uid = crgetuid(cr);
2272 uint64_t who;
2273 uint16_t type, iflags;
2274 uint16_t entry_type;
2275 uint32_t access_mask;
2276 uint32_t deny_mask = 0;
2277 zfs_ace_hdr_t *acep = NULL;
2278 boolean_t checkit;
2279 uid_t fowner;
2280 uid_t gowner;
34dc7c2f
BB		 2281
2282 zfs_fuid_map_ids(zp, cr, &fowner, &gowner);
2283
2284 mutex_enter(&zp->z_acl_lock);
2285
2286 error = zfs_acl_node_read(zp, &aclp, B_FALSE);
2287 if (error != 0) {
2288 mutex_exit(&zp->z_acl_lock);
2289 return (error);
2290 }
2291
2292 while (acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
2293 &iflags, &type)) {
9babb374 2294 uint32_t mask_matched;
34dc7c2f 2295
b128c09f
BB		 2296 if (!zfs_acl_valid_ace_type(type, iflags))
2297 continue;
2298
2299 if (ZTOV(zp)->v_type == VDIR && (iflags & ACE_INHERIT_ONLY_ACE))
34dc7c2f
BB		 2300 continue;
2301
9babb374
BB		 2302 /* Skip ACE if it does not affect any AoI */
2303 mask_matched = (access_mask & *working_mode);
2304 if (!mask_matched)
2305 continue;
2306
34dc7c2f
BB		 2307 entry_type = (iflags & ACE_TYPE_FLAGS);
2308
2309 checkit = B_FALSE;
2310
2311 switch (entry_type) {
2312 case ACE_OWNER:
2313 if (uid == fowner)
2314 checkit = B_TRUE;
2315 break;
2316 case OWNING_GROUP:
2317 who = gowner;
2318 /*FALLTHROUGH*/
2319 case ACE_IDENTIFIER_GROUP:
2320 checkit = zfs_groupmember(zfsvfs, who, cr);
2321 break;
2322 case ACE_EVERYONE:
2323 checkit = B_TRUE;
2324 break;
2325
2326 /* USER Entry */
2327 default:
2328 if (entry_type == 0) {
2329 uid_t newid;
2330
2331 newid = zfs_fuid_map_id(zfsvfs, who, cr,
2332 ZFS_ACE_USER);
2333 if (newid != IDMAP_WK_CREATOR_OWNER_UID &&
2334 uid == newid)
2335 checkit = B_TRUE;
2336 break;
2337 } else {
34dc7c2f
BB		 2338 mutex_exit(&zp->z_acl_lock);
2339 return (EIO);
2340 }
2341 }
2342
2343 if (checkit) {
9babb374
BB		 2344 if (type == DENY) {
2345 DTRACE_PROBE3(zfs__ace__denies,
2346 znode_t *, zp,
2347 zfs_ace_hdr_t *, acep,
2348 uint32_t, mask_matched);
2349 deny_mask |= mask_matched;
2350 } else {
2351 DTRACE_PROBE3(zfs__ace__allows,
2352 znode_t *, zp,
2353 zfs_ace_hdr_t *, acep,
2354 uint32_t, mask_matched);
2355 if (anyaccess) {
2356 mutex_exit(&zp->z_acl_lock);
9babb374
BB		 2357 return (0);
2358 }
34dc7c2f 2359 }
9babb374 2360 *working_mode &= ~mask_matched;
34dc7c2f
BB		 2361 }
2362
2363 /* Are we done? */
2364 if (*working_mode == 0)
2365 break;
2366 }
2367
2368 mutex_exit(&zp->z_acl_lock);
34dc7c2f
BB		 2369
2370 /* Put the found 'denies' back on the working mode */
b128c09f
BB		 2371 if (deny_mask) {
2372 *working_mode |= deny_mask;
34dc7c2f 2373 return (EACCES);
b128c09f
BB		 2374 } else if (*working_mode) {
2375 return (-1);
2376 }
34dc7c2f
BB		 2377
2378 return (0);
2379}
2380
9babb374
BB		 2381/*
2382 * Return true if any access whatsoever granted, we don't actually
2383 * care what access is granted.
2384 */
2385boolean_t
2386zfs_has_access(znode_t *zp, cred_t *cr)
2387{
2388 uint32_t have = ACE_ALL_PERMS;
2389
2390 if (zfs_zaccess_aces_check(zp, &have, B_TRUE, cr) != 0) {
2391 uid_t owner;
2392
2393 owner = zfs_fuid_map_id(zp->z_zfsvfs,
2394 zp->z_phys->zp_uid, cr, ZFS_OWNER);
2395
2396 return (
2397 secpolicy_vnode_access(cr, ZTOV(zp), owner, VREAD) == 0 ||
2398 secpolicy_vnode_access(cr, ZTOV(zp), owner, VWRITE) == 0 ||
2399 secpolicy_vnode_access(cr, ZTOV(zp), owner, VEXEC) == 0 ||
45d1cae3 2400 secpolicy_vnode_chown(cr, owner) == 0 ||
9babb374
BB		 2401 secpolicy_vnode_setdac(cr, owner) == 0 ||
2402 secpolicy_vnode_remove(cr) == 0);
2403 }
2404 return (B_TRUE);
2405}
2406
2407static int
2408zfs_zaccess_common(znode_t *zp, uint32_t v4_mode, uint32_t *working_mode,
2409 boolean_t *check_privs, boolean_t skipaclchk, cred_t *cr)
2410{
2411 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2412 int err;
2413
2414 *working_mode = v4_mode;
2415 *check_privs = B_TRUE;
2416
2417 /*
2418 * Short circuit empty requests
2419 */
2420 if (v4_mode == 0 || zfsvfs->z_replay) {
2421 *working_mode = 0;
2422 return (0);
2423 }
2424
2425 if ((err = zfs_zaccess_dataset_check(zp, v4_mode)) != 0) {
2426 *check_privs = B_FALSE;
2427 return (err);
2428 }
2429
2430 /*
2431 * The caller requested that the ACL check be skipped. This
2432 * would only happen if the caller checked VOP_ACCESS() with a
2433 * 32 bit ACE mask and already had the appropriate permissions.
2434 */
2435 if (skipaclchk) {
2436 *working_mode = 0;
2437 return (0);
2438 }
2439
2440 return (zfs_zaccess_aces_check(zp, working_mode, B_FALSE, cr));
2441}
2442
34dc7c2f
BB		 2443static int
2444zfs_zaccess_append(znode_t *zp, uint32_t *working_mode, boolean_t *check_privs,
2445 cred_t *cr)
2446{
2447 if (*working_mode != ACE_WRITE_DATA)
2448 return (EACCES);
2449
2450 return (zfs_zaccess_common(zp, ACE_APPEND_DATA, working_mode,
2451 check_privs, B_FALSE, cr));
2452}
2453
45d1cae3
BB		 2454int
2455zfs_fastaccesschk_execute(znode_t *zdp, cred_t *cr)
2456{
2457 boolean_t owner = B_FALSE;
2458 boolean_t groupmbr = B_FALSE;
2459 boolean_t is_attr;
2460 uid_t fowner;
2461 uid_t gowner;
2462 uid_t uid = crgetuid(cr);
2463 int error;
2464
2465 if (zdp->z_phys->zp_flags & ZFS_AV_QUARANTINED)
2466 return (EACCES);
2467
2468 is_attr = ((zdp->z_phys->zp_flags & ZFS_XATTR) &&
2469 (ZTOV(zdp)->v_type == VDIR));
2470 if (is_attr)
2471 goto slow;
2472
2473 mutex_enter(&zdp->z_acl_lock);
2474
2475 if (zdp->z_phys->zp_flags & ZFS_NO_EXECS_DENIED) {
2476 mutex_exit(&zdp->z_acl_lock);
2477 return (0);
2478 }
2479
2480 if (FUID_INDEX(zdp->z_phys->zp_uid) != 0 ||
2481 FUID_INDEX(zdp->z_phys->zp_gid) != 0) {
2482 mutex_exit(&zdp->z_acl_lock);
2483 goto slow;
2484 }
2485
2486 fowner = (uid_t)zdp->z_phys->zp_uid;
2487 gowner = (uid_t)zdp->z_phys->zp_gid;
2488
2489 if (uid == fowner) {
2490 owner = B_TRUE;
2491 if (zdp->z_phys->zp_mode & S_IXUSR) {
2492 mutex_exit(&zdp->z_acl_lock);
2493 return (0);
2494 } else {
2495 mutex_exit(&zdp->z_acl_lock);
2496 goto slow;
2497 }
2498 }
2499 if (groupmember(gowner, cr)) {
2500 groupmbr = B_TRUE;
2501 if (zdp->z_phys->zp_mode & S_IXGRP) {
2502 mutex_exit(&zdp->z_acl_lock);
2503 return (0);
2504 } else {
2505 mutex_exit(&zdp->z_acl_lock);
2506 goto slow;
2507 }
2508 }
2509 if (!owner && !groupmbr) {
2510 if (zdp->z_phys->zp_mode & S_IXOTH) {
2511 mutex_exit(&zdp->z_acl_lock);
2512 return (0);
2513 }
2514 }
2515
2516 mutex_exit(&zdp->z_acl_lock);
2517
2518slow:
2519 DTRACE_PROBE(zfs__fastpath__execute__access__miss);
2520 ZFS_ENTER(zdp->z_zfsvfs);
2521 error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr);
2522 ZFS_EXIT(zdp->z_zfsvfs);
2523 return (error);
2524}
2525
34dc7c2f
BB		 2526/*
2527 * Determine whether Access should be granted/denied, invoking least
2528 * priv subsytem when a deny is determined.
2529 */
2530int
2531zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr)
2532{
2533 uint32_t working_mode;
2534 int error;
2535 int is_attr;
2536 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2537 boolean_t check_privs;
2538 znode_t *xzp;
2539 znode_t *check_zp = zp;
2540
2541 is_attr = ((zp->z_phys->zp_flags & ZFS_XATTR) &&
2542 (ZTOV(zp)->v_type == VDIR));
2543
2544 /*
2545 * If attribute then validate against base file
2546 */
2547 if (is_attr) {
2548 if ((error = zfs_zget(zp->z_zfsvfs,
2549 zp->z_phys->zp_parent, &xzp)) != 0) {
2550 return (error);
2551 }
2552
2553 check_zp = xzp;
2554
2555 /*
2556 * fixup mode to map to xattr perms
2557 */
2558
2559 if (mode & (ACE_WRITE_DATA|ACE_APPEND_DATA)) {
2560 mode &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
2561 mode |= ACE_WRITE_NAMED_ATTRS;
2562 }
2563
2564 if (mode & (ACE_READ_DATA|ACE_EXECUTE)) {
2565 mode &= ~(ACE_READ_DATA|ACE_EXECUTE);
2566 mode |= ACE_READ_NAMED_ATTRS;
2567 }
2568 }
2569
2570 if ((error = zfs_zaccess_common(check_zp, mode, &working_mode,
2571 &check_privs, skipaclchk, cr)) == 0) {
2572 if (is_attr)
2573 VN_RELE(ZTOV(xzp));
2574 return (0);
2575 }
2576
2577 if (error && !check_privs) {
2578 if (is_attr)
2579 VN_RELE(ZTOV(xzp));
2580 return (error);
2581 }
2582
2583 if (error && (flags & V_APPEND)) {
2584 error = zfs_zaccess_append(zp, &working_mode, &check_privs, cr);
2585 }
2586
2587 if (error && check_privs) {
2588 uid_t owner;
2589 mode_t checkmode = 0;
2590
2591 owner = zfs_fuid_map_id(zfsvfs, check_zp->z_phys->zp_uid, cr,
2592 ZFS_OWNER);
2593
2594 /*
2595 * First check for implicit owner permission on
2596 * read_acl/read_attributes
2597 */
2598
2599 error = 0;
2600 ASSERT(working_mode != 0);
2601
2602 if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES) &&
2603 owner == crgetuid(cr)))
2604 working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES);
2605
2606 if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS|
b128c09f 2607 ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE))
34dc7c2f
BB		 2608 checkmode |= VREAD;
2609 if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
b128c09f 2610 ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
34dc7c2f
BB		 2611 checkmode |= VWRITE;
2612 if (working_mode & ACE_EXECUTE)
2613 checkmode |= VEXEC;
2614
2615 if (checkmode)
2616 error = secpolicy_vnode_access(cr, ZTOV(check_zp),
2617 owner, checkmode);
2618
2619 if (error == 0 && (working_mode & ACE_WRITE_OWNER))
45d1cae3 2620 error = secpolicy_vnode_chown(cr, owner);
34dc7c2f
BB		 2621 if (error == 0 && (working_mode & ACE_WRITE_ACL))
2622 error = secpolicy_vnode_setdac(cr, owner);
2623
2624 if (error == 0 && (working_mode &
2625 (ACE_DELETE|ACE_DELETE_CHILD)))
2626 error = secpolicy_vnode_remove(cr);
2627
b128c09f 2628 if (error == 0 && (working_mode & ACE_SYNCHRONIZE)) {
45d1cae3 2629 error = secpolicy_vnode_chown(cr, owner);
b128c09f 2630 }
34dc7c2f
BB		 2631 if (error == 0) {
2632 /*
2633 * See if any bits other than those already checked
2634 * for are still present. If so then return EACCES
2635 */
2636 if (working_mode & ~(ZFS_CHECKED_MASKS)) {
2637 error = EACCES;
2638 }
2639 }
2640 }
2641
2642 if (is_attr)
2643 VN_RELE(ZTOV(xzp));
2644
2645 return (error);
2646}
2647
2648/*
2649 * Translate traditional unix VREAD/VWRITE/VEXEC mode into
2650 * native ACL format and call zfs_zaccess()
2651 */
2652int
2653zfs_zaccess_rwx(znode_t *zp, mode_t mode, int flags, cred_t *cr)
2654{
2655 return (zfs_zaccess(zp, zfs_unix_to_v4(mode >> 6), flags, B_FALSE, cr));
2656}
2657
2658/*
2659 * Access function for secpolicy_vnode_setattr
2660 */
2661int
2662zfs_zaccess_unix(znode_t *zp, mode_t mode, cred_t *cr)
2663{
2664 int v4_mode = zfs_unix_to_v4(mode >> 6);
2665
2666 return (zfs_zaccess(zp, v4_mode, 0, B_FALSE, cr));
2667}
2668
2669static int
2670zfs_delete_final_check(znode_t *zp, znode_t *dzp,
2671 mode_t missing_perms, cred_t *cr)
2672{
2673 int error;
2674 uid_t downer;
2675 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2676
2677 downer = zfs_fuid_map_id(zfsvfs, dzp->z_phys->zp_uid, cr, ZFS_OWNER);
2678
2679 error = secpolicy_vnode_access(cr, ZTOV(dzp), downer, missing_perms);
2680
2681 if (error == 0)
2682 error = zfs_sticky_remove_access(dzp, zp, cr);
2683
2684 return (error);
2685}
2686
2687/*
2688 * Determine whether Access should be granted/deny, without
2689 * consulting least priv subsystem.
2690 *
2691 *
2692 * The following chart is the recommended NFSv4 enforcement for
2693 * ability to delete an object.
2694 *
2695 * -------------------------------------------------------
2696 * | Parent Dir | Target Object Permissions |
2697 * | permissions | |
2698 * -------------------------------------------------------
2699 * | | ACL Allows | ACL Denies| Delete |
2700 * | | Delete | Delete | unspecified|
2701 * -------------------------------------------------------
2702 * | ACL Allows | Permit | Permit | Permit |
2703 * | DELETE_CHILD | |
2704 * -------------------------------------------------------
2705 * | ACL Denies | Permit | Deny | Deny |
2706 * | DELETE_CHILD | | | |
2707 * -------------------------------------------------------
2708 * | ACL specifies | | | |
2709 * | only allow | Permit | Permit | Permit |
2710 * | write and | | | |
2711 * | execute | | | |
2712 * -------------------------------------------------------
2713 * | ACL denies | | | |
2714 * | write and | Permit | Deny | Deny |
2715 * | execute | | | |
2716 * -------------------------------------------------------
2717 * ^
2718 * |
2719 * No search privilege, can't even look up file?
2720 *
2721 */
2722int
2723zfs_zaccess_delete(znode_t *dzp, znode_t *zp, cred_t *cr)
2724{
2725 uint32_t dzp_working_mode = 0;
2726 uint32_t zp_working_mode = 0;
2727 int dzp_error, zp_error;
2728 mode_t missing_perms;
2729 boolean_t dzpcheck_privs = B_TRUE;
2730 boolean_t zpcheck_privs = B_TRUE;
2731
2732 /*
2733 * We want specific DELETE permissions to
2734 * take precedence over WRITE/EXECUTE. We don't
2735 * want an ACL such as this to mess us up.
2736 * user:joe:write_data:deny,user:joe:delete:allow
2737 *
2738 * However, deny permissions may ultimately be overridden
2739 * by secpolicy_vnode_access().
2740 *
2741 * We will ask for all of the necessary permissions and then
2742 * look at the working modes from the directory and target object
2743 * to determine what was found.
2744 */
2745
2746 if (zp->z_phys->zp_flags & (ZFS_IMMUTABLE | ZFS_NOUNLINK))
2747 return (EPERM);
2748
2749 /*
b128c09f 2750 * First row
34dc7c2f
BB		 2751 * If the directory permissions allow the delete, we are done.
2752 */
b128c09f 2753 if ((dzp_error = zfs_zaccess_common(dzp, ACE_DELETE_CHILD,
34dc7c2f
BB		 2754 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0)
2755 return (0);
2756
2757 /*
2758 * If target object has delete permission then we are done
2759 */
2760 if ((zp_error = zfs_zaccess_common(zp, ACE_DELETE, &zp_working_mode,
2761 &zpcheck_privs, B_FALSE, cr)) == 0)
2762 return (0);
2763
b128c09f
BB		 2764 ASSERT(dzp_error && zp_error);
2765
34dc7c2f
BB		 2766 if (!dzpcheck_privs)
2767 return (dzp_error);
b128c09f 2768 if (!zpcheck_privs)
34dc7c2f
BB		 2769 return (zp_error);
2770
34dc7c2f
BB		 2771 /*
2772 * Second row
b128c09f
BB		 2773 *
2774 * If directory returns EACCES then delete_child was denied
2775 * due to deny delete_child. In this case send the request through
2776 * secpolicy_vnode_remove(). We don't use zfs_delete_final_check()
2777 * since that *could* allow the delete based on write/execute permission
2778 * and we want delete permissions to override write/execute.
34dc7c2f
BB		 2779 */
2780
34dc7c2f 2781 if (dzp_error == EACCES)
b128c09f 2782 return (secpolicy_vnode_remove(cr));
34dc7c2f
BB		 2783
2784 /*
2785 * Third Row
2786 * only need to see if we have write/execute on directory.
2787 */
2788
b128c09f
BB		 2789 if ((dzp_error = zfs_zaccess_common(dzp, ACE_EXECUTE|ACE_WRITE_DATA,
2790 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0)
34dc7c2f
BB		 2791 return (zfs_sticky_remove_access(dzp, zp, cr));
2792
b128c09f
BB		 2793 if (!dzpcheck_privs)
2794 return (dzp_error);
2795
34dc7c2f 2796 /*
b128c09f 2797 * Fourth row
34dc7c2f
BB		 2798 */
2799
b128c09f
BB		 2800 missing_perms = (dzp_working_mode & ACE_WRITE_DATA) ? VWRITE : 0;
2801 missing_perms |= (dzp_working_mode & ACE_EXECUTE) ? VEXEC : 0;
2802
2803 ASSERT(missing_perms);
34dc7c2f
BB		 2804
2805 return (zfs_delete_final_check(zp, dzp, missing_perms, cr));
b128c09f 2806
34dc7c2f
BB		 2807}
2808
2809int
2810zfs_zaccess_rename(znode_t *sdzp, znode_t *szp, znode_t *tdzp,
2811 znode_t *tzp, cred_t *cr)
2812{
2813 int add_perm;
2814 int error;
2815
2816 if (szp->z_phys->zp_flags & ZFS_AV_QUARANTINED)
2817 return (EACCES);
2818
2819 add_perm = (ZTOV(szp)->v_type == VDIR) ?
2820 ACE_ADD_SUBDIRECTORY : ACE_ADD_FILE;
2821
2822 /*
2823 * Rename permissions are combination of delete permission +
2824 * add file/subdir permission.
2825 */
2826
2827 /*
2828 * first make sure we do the delete portion.
2829 *
2830 * If that succeeds then check for add_file/add_subdir permissions
2831 */
2832
2833 if (error = zfs_zaccess_delete(sdzp, szp, cr))
2834 return (error);
2835
2836 /*
2837 * If we have a tzp, see if we can delete it?
2838 */
2839 if (tzp) {
2840 if (error = zfs_zaccess_delete(tdzp, tzp, cr))
2841 return (error);
2842 }
2843
2844 /*
2845 * Now check for add permissions
2846 */
2847 error = zfs_zaccess(tdzp, add_perm, 0, B_FALSE, cr);
2848
2849 return (error);
2850}
ZFS On Linux mirror for PVE