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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/*
428870ff 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
2e528b49 23 * Copyright (c) 2013 by Delphix. All rights reserved.
34dc7c2f
BB		 24 */
25
60101509 26
34dc7c2f
BB		 27#include <sys/types.h>
28#include <sys/param.h>
29#include <sys/time.h>
30#include <sys/systm.h>
31#include <sys/sysmacros.h>
32#include <sys/resource.h>
33#include <sys/vfs.h>
34#include <sys/vnode.h>
35#include <sys/sid.h>
36#include <sys/file.h>
37#include <sys/stat.h>
38#include <sys/kmem.h>
39#include <sys/cmn_err.h>
40#include <sys/errno.h>
41#include <sys/unistd.h>
42#include <sys/sdt.h>
43#include <sys/fs/zfs.h>
44#include <sys/mode.h>
45#include <sys/policy.h>
46#include <sys/zfs_znode.h>
47#include <sys/zfs_fuid.h>
48#include <sys/zfs_acl.h>
49#include <sys/zfs_dir.h>
50#include <sys/zfs_vfsops.h>
51#include <sys/dmu.h>
52#include <sys/dnode.h>
53#include <sys/zap.h>
428870ff 54#include <sys/sa.h>
34dc7c2f 55#include "fs/fs_subr.h"
34dc7c2f
BB		 56
57#define ALLOW ACE_ACCESS_ALLOWED_ACE_TYPE
58#define DENY ACE_ACCESS_DENIED_ACE_TYPE
59#define MAX_ACE_TYPE ACE_SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE
b128c09f 60#define MIN_ACE_TYPE ALLOW
34dc7c2f
BB		 61
62#define OWNING_GROUP (ACE_GROUP|ACE_IDENTIFIER_GROUP)
63#define EVERYONE_ALLOW_MASK (ACE_READ_ACL|ACE_READ_ATTRIBUTES | \
64 ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE)
65#define EVERYONE_DENY_MASK (ACE_WRITE_ACL|ACE_WRITE_OWNER | \
66 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
67#define OWNER_ALLOW_MASK (ACE_WRITE_ACL | ACE_WRITE_OWNER | \
68 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
34dc7c2f
BB		 69
70#define ZFS_CHECKED_MASKS (ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_READ_DATA| \
71 ACE_READ_NAMED_ATTRS|ACE_WRITE_DATA|ACE_WRITE_ATTRIBUTES| \
72 ACE_WRITE_NAMED_ATTRS|ACE_APPEND_DATA|ACE_EXECUTE|ACE_WRITE_OWNER| \
73 ACE_WRITE_ACL|ACE_DELETE|ACE_DELETE_CHILD|ACE_SYNCHRONIZE)
74
9babb374
BB		 75#define WRITE_MASK_DATA (ACE_WRITE_DATA|ACE_APPEND_DATA|ACE_WRITE_NAMED_ATTRS)
76#define WRITE_MASK_ATTRS (ACE_WRITE_ACL|ACE_WRITE_OWNER|ACE_WRITE_ATTRIBUTES| \
77 ACE_DELETE|ACE_DELETE_CHILD)
78#define WRITE_MASK (WRITE_MASK_DATA|WRITE_MASK_ATTRS)
34dc7c2f
BB		 79
80#define OGE_CLEAR (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
81 ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
82
83#define OKAY_MASK_BITS (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
84 ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
85
86#define ALL_INHERIT (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE | \
87 ACE_NO_PROPAGATE_INHERIT_ACE|ACE_INHERIT_ONLY_ACE|ACE_INHERITED_ACE)
88
89#define RESTRICTED_CLEAR (ACE_WRITE_ACL|ACE_WRITE_OWNER)
90
91#define V4_ACL_WIDE_FLAGS (ZFS_ACL_AUTO_INHERIT|ZFS_ACL_DEFAULTED|\
92 ZFS_ACL_PROTECTED)
93
94#define ZFS_ACL_WIDE_FLAGS (V4_ACL_WIDE_FLAGS|ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|\
95 ZFS_ACL_OBJ_ACE)
96
45d1cae3
BB		 97#define ALL_MODE_EXECS (S_IXUSR | S_IXGRP | S_IXOTH)
98
34dc7c2f
BB		 99static uint16_t
100zfs_ace_v0_get_type(void *acep)
101{
102 return (((zfs_oldace_t *)acep)->z_type);
103}
104
105static uint16_t
106zfs_ace_v0_get_flags(void *acep)
107{
108 return (((zfs_oldace_t *)acep)->z_flags);
109}
110
111static uint32_t
112zfs_ace_v0_get_mask(void *acep)
113{
114 return (((zfs_oldace_t *)acep)->z_access_mask);
115}
116
117static uint64_t
118zfs_ace_v0_get_who(void *acep)
119{
120 return (((zfs_oldace_t *)acep)->z_fuid);
121}
122
123static void
124zfs_ace_v0_set_type(void *acep, uint16_t type)
125{
126 ((zfs_oldace_t *)acep)->z_type = type;
127}
128
129static void
130zfs_ace_v0_set_flags(void *acep, uint16_t flags)
131{
132 ((zfs_oldace_t *)acep)->z_flags = flags;
133}
134
135static void
136zfs_ace_v0_set_mask(void *acep, uint32_t mask)
137{
138 ((zfs_oldace_t *)acep)->z_access_mask = mask;
139}
140
141static void
142zfs_ace_v0_set_who(void *acep, uint64_t who)
143{
144 ((zfs_oldace_t *)acep)->z_fuid = who;
145}
146
147/*ARGSUSED*/
148static size_t
149zfs_ace_v0_size(void *acep)
150{
151 return (sizeof (zfs_oldace_t));
152}
153
154static size_t
155zfs_ace_v0_abstract_size(void)
156{
157 return (sizeof (zfs_oldace_t));
158}
159
160static int
161zfs_ace_v0_mask_off(void)
162{
163 return (offsetof(zfs_oldace_t, z_access_mask));
164}
165
166/*ARGSUSED*/
167static int
168zfs_ace_v0_data(void *acep, void **datap)
169{
170 *datap = NULL;
171 return (0);
172}
173
174static acl_ops_t zfs_acl_v0_ops = {
175 zfs_ace_v0_get_mask,
176 zfs_ace_v0_set_mask,
177 zfs_ace_v0_get_flags,
178 zfs_ace_v0_set_flags,
179 zfs_ace_v0_get_type,
180 zfs_ace_v0_set_type,
181 zfs_ace_v0_get_who,
182 zfs_ace_v0_set_who,
183 zfs_ace_v0_size,
184 zfs_ace_v0_abstract_size,
185 zfs_ace_v0_mask_off,
186 zfs_ace_v0_data
187};
188
189static uint16_t
190zfs_ace_fuid_get_type(void *acep)
191{
192 return (((zfs_ace_hdr_t *)acep)->z_type);
193}
194
195static uint16_t
196zfs_ace_fuid_get_flags(void *acep)
197{
198 return (((zfs_ace_hdr_t *)acep)->z_flags);
199}
200
201static uint32_t
202zfs_ace_fuid_get_mask(void *acep)
203{
204 return (((zfs_ace_hdr_t *)acep)->z_access_mask);
205}
206
207static uint64_t
208zfs_ace_fuid_get_who(void *args)
209{
210 uint16_t entry_type;
211 zfs_ace_t *acep = args;
212
213 entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
214
215 if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
216 entry_type == ACE_EVERYONE)
217 return (-1);
218 return (((zfs_ace_t *)acep)->z_fuid);
219}
220
221static void
222zfs_ace_fuid_set_type(void *acep, uint16_t type)
223{
224 ((zfs_ace_hdr_t *)acep)->z_type = type;
225}
226
227static void
228zfs_ace_fuid_set_flags(void *acep, uint16_t flags)
229{
230 ((zfs_ace_hdr_t *)acep)->z_flags = flags;
231}
232
233static void
234zfs_ace_fuid_set_mask(void *acep, uint32_t mask)
235{
236 ((zfs_ace_hdr_t *)acep)->z_access_mask = mask;
237}
238
239static void
240zfs_ace_fuid_set_who(void *arg, uint64_t who)
241{
242 zfs_ace_t *acep = arg;
243
244 uint16_t entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
245
246 if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
247 entry_type == ACE_EVERYONE)
248 return;
249 acep->z_fuid = who;
250}
251
252static size_t
253zfs_ace_fuid_size(void *acep)
254{
255 zfs_ace_hdr_t *zacep = acep;
256 uint16_t entry_type;
257
258 switch (zacep->z_type) {
259 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
260 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
261 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
262 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
263 return (sizeof (zfs_object_ace_t));
264 case ALLOW:
265 case DENY:
266 entry_type =
267 (((zfs_ace_hdr_t *)acep)->z_flags & ACE_TYPE_FLAGS);
268 if (entry_type == ACE_OWNER ||
b128c09f 269 entry_type == OWNING_GROUP ||
34dc7c2f
BB		 270 entry_type == ACE_EVERYONE)
271 return (sizeof (zfs_ace_hdr_t));
272 /*FALLTHROUGH*/
273 default:
274 return (sizeof (zfs_ace_t));
275 }
276}
277
278static size_t
279zfs_ace_fuid_abstract_size(void)
280{
281 return (sizeof (zfs_ace_hdr_t));
282}
283
284static int
285zfs_ace_fuid_mask_off(void)
286{
287 return (offsetof(zfs_ace_hdr_t, z_access_mask));
288}
289
290static int
291zfs_ace_fuid_data(void *acep, void **datap)
292{
293 zfs_ace_t *zacep = acep;
294 zfs_object_ace_t *zobjp;
295
296 switch (zacep->z_hdr.z_type) {
297 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
298 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
299 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
300 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
301 zobjp = acep;
302 *datap = (caddr_t)zobjp + sizeof (zfs_ace_t);
303 return (sizeof (zfs_object_ace_t) - sizeof (zfs_ace_t));
304 default:
305 *datap = NULL;
306 return (0);
307 }
308}
309
310static acl_ops_t zfs_acl_fuid_ops = {
311 zfs_ace_fuid_get_mask,
312 zfs_ace_fuid_set_mask,
313 zfs_ace_fuid_get_flags,
314 zfs_ace_fuid_set_flags,
315 zfs_ace_fuid_get_type,
316 zfs_ace_fuid_set_type,
317 zfs_ace_fuid_get_who,
318 zfs_ace_fuid_set_who,
319 zfs_ace_fuid_size,
320 zfs_ace_fuid_abstract_size,
321 zfs_ace_fuid_mask_off,
322 zfs_ace_fuid_data
323};
324
428870ff
BB		 325/*
326 * The following three functions are provided for compatibility with
327 * older ZPL version in order to determine if the file use to have
328 * an external ACL and what version of ACL previously existed on the
329 * file. Would really be nice to not need this, sigh.
330 */
428870ff
BB		 331uint64_t
332zfs_external_acl(znode_t *zp)
333{
334 zfs_acl_phys_t acl_phys;
572e2857 335 int error;
428870ff
BB		 336
337 if (zp->z_is_sa)
338 return (0);
339
572e2857
BB		 340 /*
341 * Need to deal with a potential
342 * race where zfs_sa_upgrade could cause
343 * z_isa_sa to change.
344 *
345 * If the lookup fails then the state of z_is_sa should have
346 * changed.
347 */
428870ff 348
3558fd73 349 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(ZTOZSB(zp)),
572e2857
BB		 350 &acl_phys, sizeof (acl_phys))) == 0)
351 return (acl_phys.z_acl_extern_obj);
352 else {
353 /*
354 * after upgrade the SA_ZPL_ZNODE_ACL should have been
355 * removed
356 */
357 VERIFY(zp->z_is_sa && error == ENOENT);
358 return (0);
359 }
428870ff
BB		 360}
361
362/*
363 * Determine size of ACL in bytes
364 *
365 * This is more complicated than it should be since we have to deal
366 * with old external ACLs.
367 */
368static int
369zfs_acl_znode_info(znode_t *zp, int *aclsize, int *aclcount,
370 zfs_acl_phys_t *aclphys)
371{
3558fd73 372 zfs_sb_t *zsb = ZTOZSB(zp);
428870ff
BB		 373 uint64_t acl_count;
374 int size;
375 int error;
376
572e2857 377 ASSERT(MUTEX_HELD(&zp->z_acl_lock));
428870ff 378 if (zp->z_is_sa) {
3558fd73 379 if ((error = sa_size(zp->z_sa_hdl, SA_ZPL_DACL_ACES(zsb),
428870ff
BB		 380 &size)) != 0)
381 return (error);
382 *aclsize = size;
3558fd73 383 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DACL_COUNT(zsb),
428870ff
BB		 384 &acl_count, sizeof (acl_count))) != 0)
385 return (error);
386 *aclcount = acl_count;
387 } else {
3558fd73 388 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zsb),
428870ff
BB		 389 aclphys, sizeof (*aclphys))) != 0)
390 return (error);
391
392 if (aclphys->z_acl_version == ZFS_ACL_VERSION_INITIAL) {
393 *aclsize = ZFS_ACL_SIZE(aclphys->z_acl_size);
394 *aclcount = aclphys->z_acl_size;
395 } else {
396 *aclsize = aclphys->z_acl_size;
397 *aclcount = aclphys->z_acl_count;
398 }
399 }
400 return (0);
401}
402
403int
404zfs_znode_acl_version(znode_t *zp)
405{
406 zfs_acl_phys_t acl_phys;
407
572e2857 408 if (zp->z_is_sa)
428870ff 409 return (ZFS_ACL_VERSION_FUID);
572e2857
BB		 410 else {
411 int error;
412
413 /*
414 * Need to deal with a potential
415 * race where zfs_sa_upgrade could cause
416 * z_isa_sa to change.
417 *
418 * If the lookup fails then the state of z_is_sa should have
419 * changed.
420 */
421 if ((error = sa_lookup(zp->z_sa_hdl,
3558fd73 422 SA_ZPL_ZNODE_ACL(ZTOZSB(zp)),
572e2857
BB		 423 &acl_phys, sizeof (acl_phys))) == 0)
424 return (acl_phys.z_acl_version);
425 else {
426 /*
427 * After upgrade SA_ZPL_ZNODE_ACL should have
428 * been removed.
429 */
430 VERIFY(zp->z_is_sa && error == ENOENT);
431 return (ZFS_ACL_VERSION_FUID);
432 }
428870ff
BB		 433 }
434}
435
34dc7c2f
BB		 436static int
437zfs_acl_version(int version)
438{
439 if (version < ZPL_VERSION_FUID)
440 return (ZFS_ACL_VERSION_INITIAL);
441 else
442 return (ZFS_ACL_VERSION_FUID);
443}
444
445static int
446zfs_acl_version_zp(znode_t *zp)
447{
3558fd73 448 return (zfs_acl_version(ZTOZSB(zp)->z_version));
34dc7c2f
BB		 449}
450
428870ff 451zfs_acl_t *
34dc7c2f
BB		 452zfs_acl_alloc(int vers)
453{
454 zfs_acl_t *aclp;
455
b8d06fca 456 aclp = kmem_zalloc(sizeof (zfs_acl_t), KM_PUSHPAGE);
34dc7c2f
BB		 457 list_create(&aclp->z_acl, sizeof (zfs_acl_node_t),
458 offsetof(zfs_acl_node_t, z_next));
459 aclp->z_version = vers;
460 if (vers == ZFS_ACL_VERSION_FUID)
0a6b03d3 461 aclp->z_ops = &zfs_acl_fuid_ops;
34dc7c2f 462 else
0a6b03d3 463 aclp->z_ops = &zfs_acl_v0_ops;
34dc7c2f
BB		 464 return (aclp);
465}
466
428870ff 467zfs_acl_node_t *
34dc7c2f
BB		 468zfs_acl_node_alloc(size_t bytes)
469{
470 zfs_acl_node_t *aclnode;
471
b8d06fca 472 aclnode = kmem_zalloc(sizeof (zfs_acl_node_t), KM_PUSHPAGE);
34dc7c2f 473 if (bytes) {
b8d06fca 474 aclnode->z_acldata = kmem_alloc(bytes, KM_PUSHPAGE);
34dc7c2f
BB		 475 aclnode->z_allocdata = aclnode->z_acldata;
476 aclnode->z_allocsize = bytes;
477 aclnode->z_size = bytes;
478 }
479
480 return (aclnode);
481}
482
483static void
484zfs_acl_node_free(zfs_acl_node_t *aclnode)
485{
486 if (aclnode->z_allocsize)
487 kmem_free(aclnode->z_allocdata, aclnode->z_allocsize);
488 kmem_free(aclnode, sizeof (zfs_acl_node_t));
489}
490
491static void
492zfs_acl_release_nodes(zfs_acl_t *aclp)
493{
494 zfs_acl_node_t *aclnode;
495
149e873a 496 while ((aclnode = list_head(&aclp->z_acl))) {
34dc7c2f
BB		 497 list_remove(&aclp->z_acl, aclnode);
498 zfs_acl_node_free(aclnode);
499 }
500 aclp->z_acl_count = 0;
501 aclp->z_acl_bytes = 0;
502}
503
504void
505zfs_acl_free(zfs_acl_t *aclp)
506{
507 zfs_acl_release_nodes(aclp);
508 list_destroy(&aclp->z_acl);
509 kmem_free(aclp, sizeof (zfs_acl_t));
510}
511
512static boolean_t
b128c09f 513zfs_acl_valid_ace_type(uint_t type, uint_t flags)
34dc7c2f 514{
b128c09f 515 uint16_t entry_type;
34dc7c2f 516
b128c09f
BB		 517 switch (type) {
518 case ALLOW:
519 case DENY:
520 case ACE_SYSTEM_AUDIT_ACE_TYPE:
521 case ACE_SYSTEM_ALARM_ACE_TYPE:
522 entry_type = flags & ACE_TYPE_FLAGS;
523 return (entry_type == ACE_OWNER ||
524 entry_type == OWNING_GROUP ||
525 entry_type == ACE_EVERYONE || entry_type == 0 ||
526 entry_type == ACE_IDENTIFIER_GROUP);
34dc7c2f 527 default:
b128c09f
BB		 528 if (type >= MIN_ACE_TYPE && type <= MAX_ACE_TYPE)
529 return (B_TRUE);
34dc7c2f 530 }
b128c09f
BB		 531 return (B_FALSE);
532}
34dc7c2f 533
b128c09f 534static boolean_t
3558fd73 535zfs_ace_valid(umode_t obj_mode, zfs_acl_t *aclp, uint16_t type, uint16_t iflags)
b128c09f 536{
34dc7c2f 537 /*
b128c09f 538 * first check type of entry
34dc7c2f
BB		 539 */
540
b128c09f 541 if (!zfs_acl_valid_ace_type(type, iflags))
34dc7c2f 542 return (B_FALSE);
34dc7c2f
BB		 543
544 switch (type) {
545 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
546 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
547 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
548 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
549 if (aclp->z_version < ZFS_ACL_VERSION_FUID)
550 return (B_FALSE);
551 aclp->z_hints |= ZFS_ACL_OBJ_ACE;
552 }
553
554 /*
b128c09f 555 * next check inheritance level flags
34dc7c2f 556 */
34dc7c2f 557
3558fd73 558 if (S_ISDIR(obj_mode) &&
b128c09f 559 (iflags & (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE)))
34dc7c2f
BB		 560 aclp->z_hints |= ZFS_INHERIT_ACE;
561
562 if (iflags & (ACE_INHERIT_ONLY_ACE|ACE_NO_PROPAGATE_INHERIT_ACE)) {
563 if ((iflags & (ACE_FILE_INHERIT_ACE|
564 ACE_DIRECTORY_INHERIT_ACE)) == 0) {
565 return (B_FALSE);
566 }
567 }
568
569 return (B_TRUE);
570}
571
572static void *
573zfs_acl_next_ace(zfs_acl_t *aclp, void *start, uint64_t *who,
574 uint32_t *access_mask, uint16_t *iflags, uint16_t *type)
575{
576 zfs_acl_node_t *aclnode;
577
428870ff
BB		 578 ASSERT(aclp);
579
34dc7c2f
BB		 580 if (start == NULL) {
581 aclnode = list_head(&aclp->z_acl);
582 if (aclnode == NULL)
583 return (NULL);
584
585 aclp->z_next_ace = aclnode->z_acldata;
586 aclp->z_curr_node = aclnode;
587 aclnode->z_ace_idx = 0;
588 }
589
590 aclnode = aclp->z_curr_node;
591
592 if (aclnode == NULL)
593 return (NULL);
594
595 if (aclnode->z_ace_idx >= aclnode->z_ace_count) {
596 aclnode = list_next(&aclp->z_acl, aclnode);
597 if (aclnode == NULL)
598 return (NULL);
599 else {
600 aclp->z_curr_node = aclnode;
601 aclnode->z_ace_idx = 0;
602 aclp->z_next_ace = aclnode->z_acldata;
603 }
604 }
605
606 if (aclnode->z_ace_idx < aclnode->z_ace_count) {
607 void *acep = aclp->z_next_ace;
b128c09f
BB		 608 size_t ace_size;
609
610 /*
611 * Make sure we don't overstep our bounds
612 */
0a6b03d3 613 ace_size = aclp->z_ops->ace_size(acep);
b128c09f
BB		 614
615 if (((caddr_t)acep + ace_size) >
616 ((caddr_t)aclnode->z_acldata + aclnode->z_size)) {
617 return (NULL);
618 }
619
0a6b03d3
RY		 620 *iflags = aclp->z_ops->ace_flags_get(acep);
621 *type = aclp->z_ops->ace_type_get(acep);
622 *access_mask = aclp->z_ops->ace_mask_get(acep);
623 *who = aclp->z_ops->ace_who_get(acep);
b128c09f 624 aclp->z_next_ace = (caddr_t)aclp->z_next_ace + ace_size;
34dc7c2f 625 aclnode->z_ace_idx++;
428870ff 626
34dc7c2f
BB		 627 return ((void *)acep);
628 }
629 return (NULL);
630}
631
632/*ARGSUSED*/
633static uint64_t
634zfs_ace_walk(void *datap, uint64_t cookie, int aclcnt,
635 uint16_t *flags, uint16_t *type, uint32_t *mask)
636{
637 zfs_acl_t *aclp = datap;
638 zfs_ace_hdr_t *acep = (zfs_ace_hdr_t *)(uintptr_t)cookie;
639 uint64_t who;
640
641 acep = zfs_acl_next_ace(aclp, acep, &who, mask,
642 flags, type);
643 return ((uint64_t)(uintptr_t)acep);
644}
645
34dc7c2f
BB		 646/*
647 * Copy ACE to internal ZFS format.
648 * While processing the ACL each ACE will be validated for correctness.
649 * ACE FUIDs will be created later.
650 */
651int
3558fd73 652zfs_copy_ace_2_fuid(zfs_sb_t *zsb, umode_t obj_mode, zfs_acl_t *aclp,
428870ff 653 void *datap, zfs_ace_t *z_acl, uint64_t aclcnt, size_t *size,
9babb374 654 zfs_fuid_info_t **fuidp, cred_t *cr)
34dc7c2f
BB		 655{
656 int i;
657 uint16_t entry_type;
658 zfs_ace_t *aceptr = z_acl;
659 ace_t *acep = datap;
660 zfs_object_ace_t *zobjacep;
661 ace_object_t *aceobjp;
662
663 for (i = 0; i != aclcnt; i++) {
664 aceptr->z_hdr.z_access_mask = acep->a_access_mask;
665 aceptr->z_hdr.z_flags = acep->a_flags;
666 aceptr->z_hdr.z_type = acep->a_type;
667 entry_type = aceptr->z_hdr.z_flags & ACE_TYPE_FLAGS;
668 if (entry_type != ACE_OWNER && entry_type != OWNING_GROUP &&
669 entry_type != ACE_EVERYONE) {
3558fd73 670 aceptr->z_fuid = zfs_fuid_create(zsb, acep->a_who,
9babb374
BB		 671 cr, (entry_type == 0) ?
672 ZFS_ACE_USER : ZFS_ACE_GROUP, fuidp);
34dc7c2f
BB		 673 }
674
675 /*
676 * Make sure ACE is valid
677 */
3558fd73 678 if (zfs_ace_valid(obj_mode, aclp, aceptr->z_hdr.z_type,
34dc7c2f 679 aceptr->z_hdr.z_flags) != B_TRUE)
2e528b49 680 return (SET_ERROR(EINVAL));
34dc7c2f
BB		 681
682 switch (acep->a_type) {
683 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
684 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
685 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
686 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
687 zobjacep = (zfs_object_ace_t *)aceptr;
688 aceobjp = (ace_object_t *)acep;
689
690 bcopy(aceobjp->a_obj_type, zobjacep->z_object_type,
691 sizeof (aceobjp->a_obj_type));
692 bcopy(aceobjp->a_inherit_obj_type,
693 zobjacep->z_inherit_type,
694 sizeof (aceobjp->a_inherit_obj_type));
695 acep = (ace_t *)((caddr_t)acep + sizeof (ace_object_t));
696 break;
697 default:
698 acep = (ace_t *)((caddr_t)acep + sizeof (ace_t));
699 }
700
701 aceptr = (zfs_ace_t *)((caddr_t)aceptr +
0a6b03d3 702 aclp->z_ops->ace_size(aceptr));
34dc7c2f
BB		 703 }
704
705 *size = (caddr_t)aceptr - (caddr_t)z_acl;
706
707 return (0);
708}
709
710/*
711 * Copy ZFS ACEs to fixed size ace_t layout
712 */
713static void
3558fd73 714zfs_copy_fuid_2_ace(zfs_sb_t *zsb, zfs_acl_t *aclp, cred_t *cr,
34dc7c2f
BB		 715 void *datap, int filter)
716{
717 uint64_t who;
718 uint32_t access_mask;
719 uint16_t iflags, type;
720 zfs_ace_hdr_t *zacep = NULL;
721 ace_t *acep = datap;
722 ace_object_t *objacep;
723 zfs_object_ace_t *zobjacep;
724 size_t ace_size;
725 uint16_t entry_type;
726
149e873a
BB		 727 while ((zacep = zfs_acl_next_ace(aclp, zacep,
728 &who, &access_mask, &iflags, &type))) {
34dc7c2f
BB		 729
730 switch (type) {
731 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
732 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
733 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
734 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
735 if (filter) {
736 continue;
737 }
738 zobjacep = (zfs_object_ace_t *)zacep;
739 objacep = (ace_object_t *)acep;
740 bcopy(zobjacep->z_object_type,
741 objacep->a_obj_type,
742 sizeof (zobjacep->z_object_type));
743 bcopy(zobjacep->z_inherit_type,
744 objacep->a_inherit_obj_type,
745 sizeof (zobjacep->z_inherit_type));
746 ace_size = sizeof (ace_object_t);
747 break;
748 default:
749 ace_size = sizeof (ace_t);
750 break;
751 }
752
753 entry_type = (iflags & ACE_TYPE_FLAGS);
754 if ((entry_type != ACE_OWNER &&
b128c09f 755 entry_type != OWNING_GROUP &&
34dc7c2f 756 entry_type != ACE_EVERYONE)) {
3558fd73 757 acep->a_who = zfs_fuid_map_id(zsb, who,
34dc7c2f
BB		 758 cr, (entry_type & ACE_IDENTIFIER_GROUP) ?
759 ZFS_ACE_GROUP : ZFS_ACE_USER);
760 } else {
761 acep->a_who = (uid_t)(int64_t)who;
762 }
763 acep->a_access_mask = access_mask;
764 acep->a_flags = iflags;
765 acep->a_type = type;
766 acep = (ace_t *)((caddr_t)acep + ace_size);
767 }
768}
769
770static int
3558fd73 771zfs_copy_ace_2_oldace(umode_t obj_mode, zfs_acl_t *aclp, ace_t *acep,
34dc7c2f
BB		 772 zfs_oldace_t *z_acl, int aclcnt, size_t *size)
773{
774 int i;
775 zfs_oldace_t *aceptr = z_acl;
776
777 for (i = 0; i != aclcnt; i++, aceptr++) {
778 aceptr->z_access_mask = acep[i].a_access_mask;
779 aceptr->z_type = acep[i].a_type;
780 aceptr->z_flags = acep[i].a_flags;
781 aceptr->z_fuid = acep[i].a_who;
782 /*
783 * Make sure ACE is valid
784 */
3558fd73 785 if (zfs_ace_valid(obj_mode, aclp, aceptr->z_type,
34dc7c2f 786 aceptr->z_flags) != B_TRUE)
2e528b49 787 return (SET_ERROR(EINVAL));
34dc7c2f
BB		 788 }
789 *size = (caddr_t)aceptr - (caddr_t)z_acl;
790 return (0);
791}
792
793/*
794 * convert old ACL format to new
795 */
796void
9babb374 797zfs_acl_xform(znode_t *zp, zfs_acl_t *aclp, cred_t *cr)
34dc7c2f
BB		 798{
799 zfs_oldace_t *oldaclp;
800 int i;
801 uint16_t type, iflags;
802 uint32_t access_mask;
803 uint64_t who;
804 void *cookie = NULL;
805 zfs_acl_node_t *newaclnode;
806
807 ASSERT(aclp->z_version == ZFS_ACL_VERSION_INITIAL);
808 /*
809 * First create the ACE in a contiguous piece of memory
810 * for zfs_copy_ace_2_fuid().
811 *
812 * We only convert an ACL once, so this won't happen
813 * everytime.
814 */
815 oldaclp = kmem_alloc(sizeof (zfs_oldace_t) * aclp->z_acl_count,
816 KM_SLEEP);
817 i = 0;
149e873a
BB		 818 while ((cookie = zfs_acl_next_ace(aclp, cookie, &who,
819 &access_mask, &iflags, &type))) {
34dc7c2f
BB		 820 oldaclp[i].z_flags = iflags;
821 oldaclp[i].z_type = type;
822 oldaclp[i].z_fuid = who;
823 oldaclp[i++].z_access_mask = access_mask;
824 }
825
826 newaclnode = zfs_acl_node_alloc(aclp->z_acl_count *
827 sizeof (zfs_object_ace_t));
0a6b03d3 828 aclp->z_ops = &zfs_acl_fuid_ops;
3558fd73
BB		 829 VERIFY(zfs_copy_ace_2_fuid(ZTOZSB(zp), ZTOI(zp)->i_mode,
830 aclp, oldaclp, newaclnode->z_acldata, aclp->z_acl_count,
9babb374 831 &newaclnode->z_size, NULL, cr) == 0);
34dc7c2f
BB		 832 newaclnode->z_ace_count = aclp->z_acl_count;
833 aclp->z_version = ZFS_ACL_VERSION;
834 kmem_free(oldaclp, aclp->z_acl_count * sizeof (zfs_oldace_t));
835
836 /*
837 * Release all previous ACL nodes
838 */
839
840 zfs_acl_release_nodes(aclp);
841
842 list_insert_head(&aclp->z_acl, newaclnode);
843
844 aclp->z_acl_bytes = newaclnode->z_size;
845 aclp->z_acl_count = newaclnode->z_ace_count;
846
847}
848
849/*
850 * Convert unix access mask to v4 access mask
851 */
852static uint32_t
853zfs_unix_to_v4(uint32_t access_mask)
854{
855 uint32_t new_mask = 0;
856
857 if (access_mask & S_IXOTH)
858 new_mask |= ACE_EXECUTE;
859 if (access_mask & S_IWOTH)
860 new_mask |= ACE_WRITE_DATA;
861 if (access_mask & S_IROTH)
862 new_mask |= ACE_READ_DATA;
863 return (new_mask);
864}
865
866static void
867zfs_set_ace(zfs_acl_t *aclp, void *acep, uint32_t access_mask,
868 uint16_t access_type, uint64_t fuid, uint16_t entry_type)
869{
870 uint16_t type = entry_type & ACE_TYPE_FLAGS;
871
0a6b03d3
RY		 872 aclp->z_ops->ace_mask_set(acep, access_mask);
873 aclp->z_ops->ace_type_set(acep, access_type);
874 aclp->z_ops->ace_flags_set(acep, entry_type);
b128c09f 875 if ((type != ACE_OWNER && type != OWNING_GROUP &&
34dc7c2f 876 type != ACE_EVERYONE))
0a6b03d3 877 aclp->z_ops->ace_who_set(acep, fuid);
34dc7c2f
BB		 878}
879
880/*
881 * Determine mode of file based on ACL.
882 * Also, create FUIDs for any User/Group ACEs
883 */
428870ff
BB		 884uint64_t
885zfs_mode_compute(uint64_t fmode, zfs_acl_t *aclp,
886 uint64_t *pflags, uint64_t fuid, uint64_t fgid)
34dc7c2f
BB		 887{
888 int entry_type;
889 mode_t mode;
890 mode_t seen = 0;
891 zfs_ace_hdr_t *acep = NULL;
892 uint64_t who;
893 uint16_t iflags, type;
894 uint32_t access_mask;
45d1cae3 895 boolean_t an_exec_denied = B_FALSE;
34dc7c2f 896
428870ff 897 mode = (fmode & (S_IFMT | S_ISUID | S_ISGID | S_ISVTX));
34dc7c2f 898
149e873a
BB		 899 while ((acep = zfs_acl_next_ace(aclp, acep, &who,
900 &access_mask, &iflags, &type))) {
34dc7c2f 901
b128c09f 902 if (!zfs_acl_valid_ace_type(type, iflags))
34dc7c2f
BB		 903 continue;
904
905 entry_type = (iflags & ACE_TYPE_FLAGS);
906
b128c09f
BB		 907 /*
908 * Skip over owner@, group@ or everyone@ inherit only ACEs
909 */
910 if ((iflags & ACE_INHERIT_ONLY_ACE) &&
911 (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
912 entry_type == OWNING_GROUP))
913 continue;
914
428870ff
BB		 915 if (entry_type == ACE_OWNER || (entry_type == 0 &&
916 who == fuid)) {
34dc7c2f
BB		 917 if ((access_mask & ACE_READ_DATA) &&
918 (!(seen & S_IRUSR))) {
919 seen |= S_IRUSR;
920 if (type == ALLOW) {
921 mode |= S_IRUSR;
922 }
923 }
924 if ((access_mask & ACE_WRITE_DATA) &&
925 (!(seen & S_IWUSR))) {
926 seen |= S_IWUSR;
927 if (type == ALLOW) {
928 mode |= S_IWUSR;
929 }
930 }
931 if ((access_mask & ACE_EXECUTE) &&
932 (!(seen & S_IXUSR))) {
933 seen |= S_IXUSR;
934 if (type == ALLOW) {
935 mode |= S_IXUSR;
936 }
937 }
428870ff
BB		 938 } else if (entry_type == OWNING_GROUP ||
939 (entry_type == ACE_IDENTIFIER_GROUP && who == fgid)) {
34dc7c2f
BB		 940 if ((access_mask & ACE_READ_DATA) &&
941 (!(seen & S_IRGRP))) {
942 seen |= S_IRGRP;
943 if (type == ALLOW) {
944 mode |= S_IRGRP;
945 }
946 }
947 if ((access_mask & ACE_WRITE_DATA) &&
948 (!(seen & S_IWGRP))) {
949 seen |= S_IWGRP;
950 if (type == ALLOW) {
951 mode |= S_IWGRP;
952 }
953 }
954 if ((access_mask & ACE_EXECUTE) &&
955 (!(seen & S_IXGRP))) {
956 seen |= S_IXGRP;
957 if (type == ALLOW) {
958 mode |= S_IXGRP;
959 }
960 }
961 } else if (entry_type == ACE_EVERYONE) {
962 if ((access_mask & ACE_READ_DATA)) {
963 if (!(seen & S_IRUSR)) {
964 seen |= S_IRUSR;
965 if (type == ALLOW) {
966 mode |= S_IRUSR;
967 }
968 }
969 if (!(seen & S_IRGRP)) {
970 seen |= S_IRGRP;
971 if (type == ALLOW) {
972 mode |= S_IRGRP;
973 }
974 }
975 if (!(seen & S_IROTH)) {
976 seen |= S_IROTH;
977 if (type == ALLOW) {
978 mode |= S_IROTH;
979 }
980 }
981 }
982 if ((access_mask & ACE_WRITE_DATA)) {
983 if (!(seen & S_IWUSR)) {
984 seen |= S_IWUSR;
985 if (type == ALLOW) {
986 mode |= S_IWUSR;
987 }
988 }
989 if (!(seen & S_IWGRP)) {
990 seen |= S_IWGRP;
991 if (type == ALLOW) {
992 mode |= S_IWGRP;
993 }
994 }
995 if (!(seen & S_IWOTH)) {
996 seen |= S_IWOTH;
997 if (type == ALLOW) {
998 mode |= S_IWOTH;
999 }
1000 }
1001 }
1002 if ((access_mask & ACE_EXECUTE)) {
1003 if (!(seen & S_IXUSR)) {
1004 seen |= S_IXUSR;
1005 if (type == ALLOW) {
1006 mode |= S_IXUSR;
1007 }
1008 }
1009 if (!(seen & S_IXGRP)) {
1010 seen |= S_IXGRP;
1011 if (type == ALLOW) {
1012 mode |= S_IXGRP;
1013 }
1014 }
1015 if (!(seen & S_IXOTH)) {
1016 seen |= S_IXOTH;
1017 if (type == ALLOW) {
1018 mode |= S_IXOTH;
1019 }
1020 }
1021 }
45d1cae3
BB		 1022 } else {
1023 /*
1024 * Only care if this IDENTIFIER_GROUP or
1025 * USER ACE denies execute access to someone,
1026 * mode is not affected
1027 */
1028 if ((access_mask & ACE_EXECUTE) && type == DENY)
1029 an_exec_denied = B_TRUE;
34dc7c2f 1030 }
34dc7c2f 1031 }
45d1cae3
BB		 1032
1033 /*
1034 * Failure to allow is effectively a deny, so execute permission
1035 * is denied if it was never mentioned or if we explicitly
1036 * weren't allowed it.
1037 */
1038 if (!an_exec_denied &&
1039 ((seen & ALL_MODE_EXECS) != ALL_MODE_EXECS ||
1040 (mode & ALL_MODE_EXECS) != ALL_MODE_EXECS))
1041 an_exec_denied = B_TRUE;
1042
1043 if (an_exec_denied)
428870ff 1044 *pflags &= ~ZFS_NO_EXECS_DENIED;
45d1cae3 1045 else
428870ff 1046 *pflags |= ZFS_NO_EXECS_DENIED;
45d1cae3 1047
34dc7c2f
BB		 1048 return (mode);
1049}
1050
34dc7c2f 1051/*
45d1cae3
BB		 1052 * Read an external acl object. If the intent is to modify, always
1053 * create a new acl and leave any cached acl in place.
34dc7c2f
BB		 1054 */
1055static int
572e2857
BB		 1056zfs_acl_node_read(znode_t *zp, boolean_t have_lock, zfs_acl_t **aclpp,
1057 boolean_t will_modify)
34dc7c2f 1058{
34dc7c2f 1059 zfs_acl_t *aclp;
ddc07fa5
CW		 1060 int aclsize = 0;
1061 int acl_count = 0;
34dc7c2f 1062 zfs_acl_node_t *aclnode;
428870ff
BB		 1063 zfs_acl_phys_t znode_acl;
1064 int version;
1065 int error;
572e2857 1066 boolean_t drop_lock = B_FALSE;
34dc7c2f
BB		 1067
1068 ASSERT(MUTEX_HELD(&zp->z_acl_lock));
1069
45d1cae3
BB		 1070 if (zp->z_acl_cached && !will_modify) {
1071 *aclpp = zp->z_acl_cached;
1072 return (0);
1073 }
1074
572e2857
BB		 1075 /*
1076 * close race where znode could be upgrade while trying to
1077 * read the znode attributes.
1078 *
1079 * But this could only happen if the file isn't already an SA
1080 * znode
1081 */
1082 if (!zp->z_is_sa && !have_lock) {
1083 mutex_enter(&zp->z_lock);
1084 drop_lock = B_TRUE;
1085 }
1086 version = zfs_znode_acl_version(zp);
34dc7c2f 1087
428870ff 1088 if ((error = zfs_acl_znode_info(zp, &aclsize,
572e2857
BB		 1089 &acl_count, &znode_acl)) != 0) {
1090 goto done;
1091 }
428870ff
BB		 1092
1093 aclp = zfs_acl_alloc(version);
34dc7c2f 1094
34dc7c2f
BB		 1095 aclp->z_acl_count = acl_count;
1096 aclp->z_acl_bytes = aclsize;
1097
428870ff
BB		 1098 aclnode = zfs_acl_node_alloc(aclsize);
1099 aclnode->z_ace_count = aclp->z_acl_count;
1100 aclnode->z_size = aclsize;
1101
1102 if (!zp->z_is_sa) {
1103 if (znode_acl.z_acl_extern_obj) {
3558fd73 1104 error = dmu_read(ZTOZSB(zp)->z_os,
428870ff
BB		 1105 znode_acl.z_acl_extern_obj, 0, aclnode->z_size,
1106 aclnode->z_acldata, DMU_READ_PREFETCH);
1107 } else {
1108 bcopy(znode_acl.z_ace_data, aclnode->z_acldata,
1109 aclnode->z_size);
1110 }
1111 } else {
3558fd73 1112 error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DACL_ACES(ZTOZSB(zp)),
428870ff
BB		 1113 aclnode->z_acldata, aclnode->z_size);
1114 }
1115
34dc7c2f
BB		 1116 if (error != 0) {
1117 zfs_acl_free(aclp);
428870ff 1118 zfs_acl_node_free(aclnode);
b128c09f
BB		 1119 /* convert checksum errors into IO errors */
1120 if (error == ECKSUM)
2e528b49 1121 error = SET_ERROR(EIO);
572e2857 1122 goto done;
34dc7c2f
BB		 1123 }
1124
428870ff
BB		 1125 list_insert_head(&aclp->z_acl, aclnode);
1126
34dc7c2f 1127 *aclpp = aclp;
45d1cae3
BB		 1128 if (!will_modify)
1129 zp->z_acl_cached = aclp;
572e2857
BB		 1130done:
1131 if (drop_lock)
1132 mutex_exit(&zp->z_lock);
1133 return (error);
34dc7c2f
BB		 1134}
1135
428870ff
BB		 1136/*ARGSUSED*/
1137void
1138zfs_acl_data_locator(void **dataptr, uint32_t *length, uint32_t buflen,
1139 boolean_t start, void *userdata)
1140{
1141 zfs_acl_locator_cb_t *cb = (zfs_acl_locator_cb_t *)userdata;
1142
1143 if (start) {
1144 cb->cb_acl_node = list_head(&cb->cb_aclp->z_acl);
1145 } else {
1146 cb->cb_acl_node = list_next(&cb->cb_aclp->z_acl,
1147 cb->cb_acl_node);
1148 }
1149 *dataptr = cb->cb_acl_node->z_acldata;
1150 *length = cb->cb_acl_node->z_size;
1151}
1152
428870ff
BB		 1153int
1154zfs_acl_chown_setattr(znode_t *zp)
1155{
1156 int error;
1157 zfs_acl_t *aclp;
428870ff 1158
d1d7e268
MK		 1159 if (ZTOZSB(zp)->z_acl_type == ZFS_ACLTYPE_POSIXACL)
1160 return (0);
023699cd 1161
572e2857
BB		 1162 ASSERT(MUTEX_HELD(&zp->z_lock));
1163 ASSERT(MUTEX_HELD(&zp->z_acl_lock));
428870ff 1164
572e2857 1165 if ((error = zfs_acl_node_read(zp, B_TRUE, &aclp, B_FALSE)) == 0)
428870ff 1166 zp->z_mode = zfs_mode_compute(zp->z_mode, aclp,
572e2857 1167 &zp->z_pflags, zp->z_uid, zp->z_gid);
d1d7e268 1168
428870ff
BB		 1169 return (error);
1170}
1171
538f669f
BB		 1172static void
1173acl_trivial_access_masks(mode_t mode, uint32_t *allow0, uint32_t *deny1,
1174 uint32_t *deny2, uint32_t *owner, uint32_t *group, uint32_t *everyone)
1175{
1176 *deny1 = *deny2 = *allow0 = *group = 0;
1177
1178 if (!(mode & S_IRUSR) && (mode & (S_IRGRP|S_IROTH)))
1179 *deny1 |= ACE_READ_DATA;
1180 if (!(mode & S_IWUSR) && (mode & (S_IWGRP|S_IWOTH)))
1181 *deny1 |= ACE_WRITE_DATA;
1182 if (!(mode & S_IXUSR) && (mode & (S_IXGRP|S_IXOTH)))
1183 *deny1 |= ACE_EXECUTE;
1184
1185 if (!(mode & S_IRGRP) && (mode & S_IROTH))
1186 *deny2 = ACE_READ_DATA;
1187 if (!(mode & S_IWGRP) && (mode & S_IWOTH))
1188 *deny2 |= ACE_WRITE_DATA;
1189 if (!(mode & S_IXGRP) && (mode & S_IXOTH))
1190 *deny2 |= ACE_EXECUTE;
1191
1192 if ((mode & S_IRUSR) && (!(mode & S_IRGRP) && (mode & S_IROTH)))
1193 *allow0 |= ACE_READ_DATA;
1194 if ((mode & S_IWUSR) && (!(mode & S_IWGRP) && (mode & S_IWOTH)))
1195 *allow0 |= ACE_WRITE_DATA;
1196 if ((mode & S_IXUSR) && (!(mode & S_IXGRP) && (mode & S_IXOTH)))
1197 *allow0 |= ACE_EXECUTE;
1198
1199 *owner = ACE_WRITE_ATTRIBUTES|ACE_WRITE_OWNER|ACE_WRITE_ACL|
1200 ACE_WRITE_NAMED_ATTRS|ACE_READ_ACL|ACE_READ_ATTRIBUTES|
1201 ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE;
1202 if (mode & S_IRUSR)
1203 *owner |= ACE_READ_DATA;
1204 if (mode & S_IWUSR)
1205 *owner |= ACE_WRITE_DATA|ACE_APPEND_DATA;
1206 if (mode & S_IXUSR)
1207 *owner |= ACE_EXECUTE;
1208
1209 *group = ACE_READ_ACL|ACE_READ_ATTRIBUTES| ACE_READ_NAMED_ATTRS|
1210 ACE_SYNCHRONIZE;
1211 if (mode & S_IRGRP)
1212 *group |= ACE_READ_DATA;
1213 if (mode & S_IWGRP)
1214 *group |= ACE_WRITE_DATA|ACE_APPEND_DATA;
1215 if (mode & S_IXGRP)
1216 *group |= ACE_EXECUTE;
1217
1218 *everyone = ACE_READ_ACL|ACE_READ_ATTRIBUTES| ACE_READ_NAMED_ATTRS|
1219 ACE_SYNCHRONIZE;
1220 if (mode & S_IROTH)
1221 *everyone |= ACE_READ_DATA;
1222 if (mode & S_IWOTH)
1223 *everyone |= ACE_WRITE_DATA|ACE_APPEND_DATA;
1224 if (mode & S_IXOTH)
1225 *everyone |= ACE_EXECUTE;
1226}
1227
1228/*
1229 * ace_trivial:
1230 * determine whether an ace_t acl is trivial
1231 *
1232 * Trivialness implies that the acl is composed of only
1233 * owner, group, everyone entries. ACL can't
1234 * have read_acl denied, and write_owner/write_acl/write_attributes
1235 * can only be owner@ entry.
1236 */
1237static int
1238ace_trivial_common(void *acep, int aclcnt,
1239 uint64_t (*walk)(void *, uint64_t, int aclcnt,
1240 uint16_t *, uint16_t *, uint32_t *))
1241{
1242 uint16_t flags;
1243 uint32_t mask;
1244 uint16_t type;
1245 uint64_t cookie = 0;
1246
1247 while ((cookie = walk(acep, cookie, aclcnt, &flags, &type, &mask))) {
1248 switch (flags & ACE_TYPE_FLAGS) {
1249 case ACE_OWNER:
1250 case ACE_GROUP|ACE_IDENTIFIER_GROUP:
1251 case ACE_EVERYONE:
1252 break;
1253 default:
1254 return (1);
1255 }
1256
1257 if (flags & (ACE_FILE_INHERIT_ACE|
1258 ACE_DIRECTORY_INHERIT_ACE|ACE_NO_PROPAGATE_INHERIT_ACE|
1259 ACE_INHERIT_ONLY_ACE))
1260 return (1);
1261
1262 /*
1263 * Special check for some special bits
1264 *
1265 * Don't allow anybody to deny reading basic
1266 * attributes or a files ACL.
1267 */
1268 if ((mask & (ACE_READ_ACL|ACE_READ_ATTRIBUTES)) &&
1269 (type == ACE_ACCESS_DENIED_ACE_TYPE))
1270 return (1);
1271
1272 /*
1273 * Delete permissions are never set by default
1274 */
1275 if (mask & (ACE_DELETE|ACE_DELETE_CHILD))
1276 return (1);
1277 /*
1278 * only allow owner@ to have
1279 * write_acl/write_owner/write_attributes/write_xattr/
1280 */
1281 if (type == ACE_ACCESS_ALLOWED_ACE_TYPE &&
1282 (!(flags & ACE_OWNER) && (mask &
1283 (ACE_WRITE_OWNER|ACE_WRITE_ACL| ACE_WRITE_ATTRIBUTES|
1284 ACE_WRITE_NAMED_ATTRS))))
1285 return (1);
1286
1287 }
1288
1289 return (0);
1290}
1291
34dc7c2f
BB		 1292/*
1293 * common code for setting ACLs.
1294 *
1295 * This function is called from zfs_mode_update, zfs_perm_init, and zfs_setacl.
1296 * zfs_setacl passes a non-NULL inherit pointer (ihp) to indicate that it's
1297 * already checked the acl and knows whether to inherit.
1298 */
1299int
9babb374 1300zfs_aclset_common(znode_t *zp, zfs_acl_t *aclp, cred_t *cr, dmu_tx_t *tx)
34dc7c2f 1301{
428870ff 1302 int error;
3558fd73 1303 zfs_sb_t *zsb = ZTOZSB(zp);
428870ff
BB		 1304 dmu_object_type_t otype;
1305 zfs_acl_locator_cb_t locate = { 0 };
1306 uint64_t mode;
1307 sa_bulk_attr_t bulk[5];
1308 uint64_t ctime[2];
1309 int count = 0;
428870ff
BB		 1310
1311 mode = zp->z_mode;
1312
572e2857
BB		 1313 mode = zfs_mode_compute(mode, aclp, &zp->z_pflags,
1314 zp->z_uid, zp->z_gid);
34dc7c2f 1315
428870ff 1316 zp->z_mode = mode;
3558fd73 1317 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zsb), NULL,
428870ff 1318 &mode, sizeof (mode));
3558fd73 1319 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zsb), NULL,
428870ff 1320 &zp->z_pflags, sizeof (zp->z_pflags));
3558fd73 1321 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zsb), NULL,
428870ff 1322 &ctime, sizeof (ctime));
34dc7c2f 1323
45d1cae3
BB		 1324 if (zp->z_acl_cached) {
1325 zfs_acl_free(zp->z_acl_cached);
1326 zp->z_acl_cached = NULL;
1327 }
1328
34dc7c2f 1329 /*
428870ff 1330 * Upgrade needed?
34dc7c2f 1331 */
3558fd73 1332 if (!zsb->z_use_fuids) {
34dc7c2f
BB		 1333 otype = DMU_OT_OLDACL;
1334 } else {
1335 if ((aclp->z_version == ZFS_ACL_VERSION_INITIAL) &&
3558fd73 1336 (zsb->z_version >= ZPL_VERSION_FUID))
9babb374 1337 zfs_acl_xform(zp, aclp, cr);
34dc7c2f
BB		 1338 ASSERT(aclp->z_version >= ZFS_ACL_VERSION_FUID);
1339 otype = DMU_OT_ACL;
1340 }
1341
428870ff
BB		 1342 /*
1343 * Arrgh, we have to handle old on disk format
1344 * as well as newer (preferred) SA format.
1345 */
1346
1347 if (zp->z_is_sa) { /* the easy case, just update the ACL attribute */
1348 locate.cb_aclp = aclp;
3558fd73 1349 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_ACES(zsb),
428870ff 1350 zfs_acl_data_locator, &locate, aclp->z_acl_bytes);
3558fd73 1351 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_COUNT(zsb),
428870ff
BB		 1352 NULL, &aclp->z_acl_count, sizeof (uint64_t));
1353 } else { /* Painful legacy way */
1354 zfs_acl_node_t *aclnode;
1355 uint64_t off = 0;
1356 zfs_acl_phys_t acl_phys;
1357 uint64_t aoid;
1358
3558fd73 1359 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zsb),
428870ff
BB		 1360 &acl_phys, sizeof (acl_phys))) != 0)
1361 return (error);
1362
1363 aoid = acl_phys.z_acl_extern_obj;
1364
1365 if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
1366 /*
1367 * If ACL was previously external and we are now
1368 * converting to new ACL format then release old
1369 * ACL object and create a new one.
1370 */
1371 if (aoid &&
1372 aclp->z_version != acl_phys.z_acl_version) {
3558fd73 1373 error = dmu_object_free(zsb->z_os, aoid, tx);
428870ff
BB		 1374 if (error)
1375 return (error);
1376 aoid = 0;
1377 }
1378 if (aoid == 0) {
3558fd73 1379 aoid = dmu_object_alloc(zsb->z_os,
428870ff
BB		 1380 otype, aclp->z_acl_bytes,
1381 otype == DMU_OT_ACL ?
1382 DMU_OT_SYSACL : DMU_OT_NONE,
1383 otype == DMU_OT_ACL ?
1384 DN_MAX_BONUSLEN : 0, tx);
1385 } else {
3558fd73 1386 (void) dmu_object_set_blocksize(zsb->z_os,
428870ff
BB		 1387 aoid, aclp->z_acl_bytes, 0, tx);
1388 }
1389 acl_phys.z_acl_extern_obj = aoid;
1390 for (aclnode = list_head(&aclp->z_acl); aclnode;
1391 aclnode = list_next(&aclp->z_acl, aclnode)) {
1392 if (aclnode->z_ace_count == 0)
1393 continue;
3558fd73 1394 dmu_write(zsb->z_os, aoid, off,
428870ff
BB		 1395 aclnode->z_size, aclnode->z_acldata, tx);
1396 off += aclnode->z_size;
1397 }
34dc7c2f 1398 } else {
428870ff
BB		 1399 void *start = acl_phys.z_ace_data;
1400 /*
1401 * Migrating back embedded?
1402 */
1403 if (acl_phys.z_acl_extern_obj) {
3558fd73 1404 error = dmu_object_free(zsb->z_os,
428870ff
BB		 1405 acl_phys.z_acl_extern_obj, tx);
1406 if (error)
1407 return (error);
1408 acl_phys.z_acl_extern_obj = 0;
1409 }
1410
1411 for (aclnode = list_head(&aclp->z_acl); aclnode;
1412 aclnode = list_next(&aclp->z_acl, aclnode)) {
1413 if (aclnode->z_ace_count == 0)
1414 continue;
1415 bcopy(aclnode->z_acldata, start,
1416 aclnode->z_size);
1417 start = (caddr_t)start + aclnode->z_size;
1418 }
34dc7c2f 1419 }
34dc7c2f 1420 /*
428870ff
BB		 1421 * If Old version then swap count/bytes to match old
1422 * layout of znode_acl_phys_t.
34dc7c2f 1423 */
428870ff
BB		 1424 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
1425 acl_phys.z_acl_size = aclp->z_acl_count;
1426 acl_phys.z_acl_count = aclp->z_acl_bytes;
1427 } else {
1428 acl_phys.z_acl_size = aclp->z_acl_bytes;
1429 acl_phys.z_acl_count = aclp->z_acl_count;
34dc7c2f 1430 }
428870ff 1431 acl_phys.z_acl_version = aclp->z_version;
34dc7c2f 1432
3558fd73 1433 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zsb), NULL,
428870ff 1434 &acl_phys, sizeof (acl_phys));
34dc7c2f
BB		 1435 }
1436
34dc7c2f
BB		 1437 /*
1438 * Replace ACL wide bits, but first clear them.
1439 */
428870ff 1440 zp->z_pflags &= ~ZFS_ACL_WIDE_FLAGS;
34dc7c2f 1441
428870ff 1442 zp->z_pflags |= aclp->z_hints;
34dc7c2f
BB		 1443
1444 if (ace_trivial_common(aclp, 0, zfs_ace_walk) == 0)
428870ff 1445 zp->z_pflags |= ZFS_ACL_TRIVIAL;
34dc7c2f 1446
428870ff
BB		 1447 zfs_tstamp_update_setup(zp, STATE_CHANGED, NULL, ctime, B_TRUE);
1448 return (sa_bulk_update(zp->z_sa_hdl, bulk, count, tx));
34dc7c2f
BB		 1449}
1450
34dc7c2f 1451static void
3558fd73 1452zfs_acl_chmod(zfs_sb_t *zsb, uint64_t mode, zfs_acl_t *aclp)
34dc7c2f 1453{
428870ff 1454 void *acep = NULL;
34dc7c2f 1455 uint64_t who;
428870ff
BB		 1456 int new_count, new_bytes;
1457 int ace_size;
3558fd73 1458 int entry_type;
34dc7c2f
BB		 1459 uint16_t iflags, type;
1460 uint32_t access_mask;
428870ff 1461 zfs_acl_node_t *newnode;
0a6b03d3 1462 size_t abstract_size = aclp->z_ops->ace_abstract_size();
3558fd73
BB		 1463 void *zacep;
1464 uint32_t owner, group, everyone;
428870ff
BB		 1465 uint32_t deny1, deny2, allow0;
1466
1467 new_count = new_bytes = 0;
1468
1469 acl_trivial_access_masks((mode_t)mode, &allow0, &deny1, &deny2,
1470 &owner, &group, &everyone);
1471
1472 newnode = zfs_acl_node_alloc((abstract_size * 6) + aclp->z_acl_bytes);
1473
1474 zacep = newnode->z_acldata;
1475 if (allow0) {
1476 zfs_set_ace(aclp, zacep, allow0, ALLOW, -1, ACE_OWNER);
1477 zacep = (void *)((uintptr_t)zacep + abstract_size);
1478 new_count++;
1479 new_bytes += abstract_size;
d3cc8b15
WA		 1480 }
1481 if (deny1) {
428870ff
BB		 1482 zfs_set_ace(aclp, zacep, deny1, DENY, -1, ACE_OWNER);
1483 zacep = (void *)((uintptr_t)zacep + abstract_size);
1484 new_count++;
1485 new_bytes += abstract_size;
1486 }
1487 if (deny2) {
1488 zfs_set_ace(aclp, zacep, deny2, DENY, -1, OWNING_GROUP);
1489 zacep = (void *)((uintptr_t)zacep + abstract_size);
1490 new_count++;
1491 new_bytes += abstract_size;
1492 }
34dc7c2f 1493
149e873a
BB		 1494 while ((acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
1495 &iflags, &type))) {
428870ff 1496 uint16_t inherit_flags;
34dc7c2f
BB		 1497
1498 entry_type = (iflags & ACE_TYPE_FLAGS);
428870ff
BB		 1499 inherit_flags = (iflags & ALL_INHERIT);
1500
1501 if ((entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
1502 (entry_type == OWNING_GROUP)) &&
1503 ((inherit_flags & ACE_INHERIT_ONLY_ACE) == 0)) {
1504 continue;
1505 }
34dc7c2f
BB		 1506
1507 if ((type != ALLOW && type != DENY) ||
428870ff
BB		 1508 (inherit_flags & ACE_INHERIT_ONLY_ACE)) {
1509 if (inherit_flags)
34dc7c2f
BB		 1510 aclp->z_hints |= ZFS_INHERIT_ACE;
1511 switch (type) {
1512 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1513 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1514 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1515 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
1516 aclp->z_hints |= ZFS_ACL_OBJ_ACE;
1517 break;
1518 }
34dc7c2f 1519 } else {
34dc7c2f 1520
428870ff
BB		 1521 /*
1522 * Limit permissions to be no greater than
1523 * group permissions
1524 */
3558fd73 1525 if (zsb->z_acl_inherit == ZFS_ACL_RESTRICTED) {
428870ff
BB		 1526 if (!(mode & S_IRGRP))
1527 access_mask &= ~ACE_READ_DATA;
1528 if (!(mode & S_IWGRP))
1529 access_mask &=
1530 ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
1531 if (!(mode & S_IXGRP))
1532 access_mask &= ~ACE_EXECUTE;
1533 access_mask &=
1534 ~(ACE_WRITE_OWNER|ACE_WRITE_ACL|
1535 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS);
1536 }
34dc7c2f 1537 }
428870ff 1538 zfs_set_ace(aclp, zacep, access_mask, type, who, iflags);
0a6b03d3 1539 ace_size = aclp->z_ops->ace_size(acep);
428870ff
BB		 1540 zacep = (void *)((uintptr_t)zacep + ace_size);
1541 new_count++;
1542 new_bytes += ace_size;
1543 }
1544 zfs_set_ace(aclp, zacep, owner, 0, -1, ACE_OWNER);
1545 zacep = (void *)((uintptr_t)zacep + abstract_size);
1546 zfs_set_ace(aclp, zacep, group, 0, -1, OWNING_GROUP);
1547 zacep = (void *)((uintptr_t)zacep + abstract_size);
1548 zfs_set_ace(aclp, zacep, everyone, 0, -1, ACE_EVERYONE);
1549
1550 new_count += 3;
1551 new_bytes += abstract_size * 3;
1552 zfs_acl_release_nodes(aclp);
1553 aclp->z_acl_count = new_count;
1554 aclp->z_acl_bytes = new_bytes;
1555 newnode->z_ace_count = new_count;
1556 newnode->z_size = new_bytes;
1557 list_insert_tail(&aclp->z_acl, newnode);
34dc7c2f
BB		 1558}
1559
572e2857 1560void
34dc7c2f
BB		 1561zfs_acl_chmod_setattr(znode_t *zp, zfs_acl_t **aclp, uint64_t mode)
1562{
34dc7c2f 1563 mutex_enter(&zp->z_acl_lock);
572e2857 1564 mutex_enter(&zp->z_lock);
428870ff
BB		 1565 *aclp = zfs_acl_alloc(zfs_acl_version_zp(zp));
1566 (*aclp)->z_hints = zp->z_pflags & V4_ACL_WIDE_FLAGS;
3558fd73 1567 zfs_acl_chmod(ZTOZSB(zp), mode, *aclp);
34dc7c2f 1568 mutex_exit(&zp->z_lock);
572e2857 1569 mutex_exit(&zp->z_acl_lock);
428870ff 1570 ASSERT(*aclp);
34dc7c2f
BB		 1571}
1572
1573/*
1574 * strip off write_owner and write_acl
1575 */
1576static void
3558fd73 1577zfs_restricted_update(zfs_sb_t *zsb, zfs_acl_t *aclp, void *acep)
34dc7c2f 1578{
0a6b03d3 1579 uint32_t mask = aclp->z_ops->ace_mask_get(acep);
34dc7c2f 1580
3558fd73 1581 if ((zsb->z_acl_inherit == ZFS_ACL_RESTRICTED) &&
0a6b03d3 1582 (aclp->z_ops->ace_type_get(acep) == ALLOW)) {
34dc7c2f 1583 mask &= ~RESTRICTED_CLEAR;
0a6b03d3 1584 aclp->z_ops->ace_mask_set(acep, mask);
34dc7c2f
BB		 1585 }
1586}
1587
1588/*
1589 * Should ACE be inherited?
1590 */
1591static int
3558fd73 1592zfs_ace_can_use(umode_t obj_mode, uint16_t acep_flags)
34dc7c2f 1593{
34dc7c2f
BB		 1594 int iflags = (acep_flags & 0xf);
1595
3558fd73 1596 if (S_ISDIR(obj_mode) && (iflags & ACE_DIRECTORY_INHERIT_ACE))
34dc7c2f
BB		 1597 return (1);
1598 else if (iflags & ACE_FILE_INHERIT_ACE)
3558fd73 1599 return (!(S_ISDIR(obj_mode) &&
34dc7c2f
BB		 1600 (iflags & ACE_NO_PROPAGATE_INHERIT_ACE)));
1601 return (0);
1602}
1603
1604/*
1605 * inherit inheritable ACEs from parent
1606 */
1607static zfs_acl_t *
3558fd73 1608zfs_acl_inherit(zfs_sb_t *zsb, umode_t obj_mode, zfs_acl_t *paclp,
9babb374 1609 uint64_t mode, boolean_t *need_chmod)
34dc7c2f 1610{
34dc7c2f 1611 void *pacep;
428870ff
BB		 1612 void *acep;
1613 zfs_acl_node_t *aclnode;
34dc7c2f
BB		 1614 zfs_acl_t *aclp = NULL;
1615 uint64_t who;
1616 uint32_t access_mask;
1617 uint16_t iflags, newflags, type;
1618 size_t ace_size;
1619 void *data1, *data2;
1620 size_t data1sz, data2sz;
3558fd73
BB		 1621 boolean_t vdir = S_ISDIR(obj_mode);
1622 boolean_t vreg = S_ISREG(obj_mode);
b128c09f
BB		 1623 boolean_t passthrough, passthrough_x, noallow;
1624
1625 passthrough_x =
3558fd73 1626 zsb->z_acl_inherit == ZFS_ACL_PASSTHROUGH_X;
b128c09f 1627 passthrough = passthrough_x ||
3558fd73 1628 zsb->z_acl_inherit == ZFS_ACL_PASSTHROUGH;
b128c09f 1629 noallow =
3558fd73 1630 zsb->z_acl_inherit == ZFS_ACL_NOALLOW;
34dc7c2f
BB		 1631
1632 *need_chmod = B_TRUE;
1633 pacep = NULL;
b128c09f 1634 aclp = zfs_acl_alloc(paclp->z_version);
3558fd73 1635 if (zsb->z_acl_inherit == ZFS_ACL_DISCARD || S_ISLNK(obj_mode))
b128c09f 1636 return (aclp);
149e873a
BB		 1637 while ((pacep = zfs_acl_next_ace(paclp, pacep, &who,
1638 &access_mask, &iflags, &type))) {
34dc7c2f 1639
b128c09f
BB		 1640 /*
1641 * don't inherit bogus ACEs
1642 */
1643 if (!zfs_acl_valid_ace_type(type, iflags))
1644 continue;
34dc7c2f 1645
b128c09f
BB		 1646 if (noallow && type == ALLOW)
1647 continue;
34dc7c2f 1648
0a6b03d3 1649 ace_size = aclp->z_ops->ace_size(pacep);
34dc7c2f 1650
3558fd73 1651 if (!zfs_ace_can_use(obj_mode, iflags))
b128c09f
BB		 1652 continue;
1653
1654 /*
1655 * If owner@, group@, or everyone@ inheritable
1656 * then zfs_acl_chmod() isn't needed.
1657 */
1658 if (passthrough &&
1659 ((iflags & (ACE_OWNER|ACE_EVERYONE)) ||
1660 ((iflags & OWNING_GROUP) ==
1661 OWNING_GROUP)) && (vreg || (vdir && (iflags &
1662 ACE_DIRECTORY_INHERIT_ACE)))) {
1663 *need_chmod = B_FALSE;
428870ff 1664 }
b128c09f 1665
428870ff
BB		 1666 if (!vdir && passthrough_x &&
1667 ((mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0)) {
1668 access_mask &= ~ACE_EXECUTE;
b128c09f
BB		 1669 }
1670
1671 aclnode = zfs_acl_node_alloc(ace_size);
1672 list_insert_tail(&aclp->z_acl, aclnode);
1673 acep = aclnode->z_acldata;
1674
1675 zfs_set_ace(aclp, acep, access_mask, type,
1676 who, iflags|ACE_INHERITED_ACE);
1677
1678 /*
1679 * Copy special opaque data if any
1680 */
0a6b03d3
RY		 1681 if ((data1sz = paclp->z_ops->ace_data(pacep, &data1)) != 0) {
1682 VERIFY((data2sz = aclp->z_ops->ace_data(acep,
b128c09f
BB		 1683 &data2)) == data1sz);
1684 bcopy(data1, data2, data2sz);
1685 }
428870ff 1686
b128c09f
BB		 1687 aclp->z_acl_count++;
1688 aclnode->z_ace_count++;
1689 aclp->z_acl_bytes += aclnode->z_size;
0a6b03d3 1690 newflags = aclp->z_ops->ace_flags_get(acep);
b128c09f
BB		 1691
1692 if (vdir)
1693 aclp->z_hints |= ZFS_INHERIT_ACE;
1694
1695 if ((iflags & ACE_NO_PROPAGATE_INHERIT_ACE) || !vdir) {
1696 newflags &= ~ALL_INHERIT;
0a6b03d3 1697 aclp->z_ops->ace_flags_set(acep,
b128c09f 1698 newflags|ACE_INHERITED_ACE);
3558fd73 1699 zfs_restricted_update(zsb, aclp, acep);
b128c09f
BB		 1700 continue;
1701 }
1702
1703 ASSERT(vdir);
1704
428870ff
BB		 1705 /*
1706 * If only FILE_INHERIT is set then turn on
1707 * inherit_only
1708 */
b128c09f 1709 if ((iflags & (ACE_FILE_INHERIT_ACE |
428870ff 1710 ACE_DIRECTORY_INHERIT_ACE)) == ACE_FILE_INHERIT_ACE) {
b128c09f 1711 newflags |= ACE_INHERIT_ONLY_ACE;
0a6b03d3 1712 aclp->z_ops->ace_flags_set(acep,
b128c09f 1713 newflags|ACE_INHERITED_ACE);
b128c09f 1714 } else {
428870ff 1715 newflags &= ~ACE_INHERIT_ONLY_ACE;
0a6b03d3 1716 aclp->z_ops->ace_flags_set(acep,
b128c09f 1717 newflags|ACE_INHERITED_ACE);
34dc7c2f
BB		 1718 }
1719 }
1720 return (aclp);
1721}
1722
1723/*
1724 * Create file system object initial permissions
1725 * including inheritable ACEs.
1726 */
9babb374
BB		 1727int
1728zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
1729 vsecattr_t *vsecp, zfs_acl_ids_t *acl_ids)
34dc7c2f 1730{
34dc7c2f 1731 int error;
3558fd73 1732 zfs_sb_t *zsb = ZTOZSB(dzp);
34dc7c2f 1733 zfs_acl_t *paclp;
a405c8a6 1734#ifdef HAVE_KSID
34dc7c2f 1735 gid_t gid;
a405c8a6 1736#endif /* HAVE_KSID */
34dc7c2f 1737 boolean_t need_chmod = B_TRUE;
428870ff 1738 boolean_t inherited = B_FALSE;
34dc7c2f 1739
9babb374 1740 bzero(acl_ids, sizeof (zfs_acl_ids_t));
3558fd73 1741 acl_ids->z_mode = vap->va_mode;
34dc7c2f 1742
9babb374 1743 if (vsecp)
3558fd73
BB		 1744 if ((error = zfs_vsec_2_aclp(zsb, vap->va_mode, vsecp,
1745 cr, &acl_ids->z_fuidp, &acl_ids->z_aclp)) != 0)
9babb374 1746 return (error);
a405c8a6
BB		 1747
1748 acl_ids->z_fuid = vap->va_uid;
1749 acl_ids->z_fgid = vap->va_gid;
1750#ifdef HAVE_KSID
34dc7c2f
BB		 1751 /*
1752 * Determine uid and gid.
1753 */
3558fd73
BB		 1754 if ((flag & IS_ROOT_NODE) || zsb->z_replay ||
1755 ((flag & IS_XATTR) && (S_ISDIR(vap->va_mode)))) {
1756 acl_ids->z_fuid = zfs_fuid_create(zsb, (uint64_t)vap->va_uid,
1757 cr, ZFS_OWNER, &acl_ids->z_fuidp);
1758 acl_ids->z_fgid = zfs_fuid_create(zsb, (uint64_t)vap->va_gid,
1759 cr, ZFS_GROUP, &acl_ids->z_fuidp);
34dc7c2f
BB		 1760 gid = vap->va_gid;
1761 } else {
3558fd73 1762 acl_ids->z_fuid = zfs_fuid_create_cred(zsb, ZFS_OWNER,
9babb374
BB		 1763 cr, &acl_ids->z_fuidp);
1764 acl_ids->z_fgid = 0;
34dc7c2f 1765 if (vap->va_mask & AT_GID) {
3558fd73 1766 acl_ids->z_fgid = zfs_fuid_create(zsb,
9babb374
BB		 1767 (uint64_t)vap->va_gid,
1768 cr, ZFS_GROUP, &acl_ids->z_fuidp);
34dc7c2f 1769 gid = vap->va_gid;
572e2857 1770 if (acl_ids->z_fgid != dzp->z_gid &&
34dc7c2f
BB		 1771 !groupmember(vap->va_gid, cr) &&
1772 secpolicy_vnode_create_gid(cr) != 0)
9babb374 1773 acl_ids->z_fgid = 0;
34dc7c2f 1774 }
9babb374 1775 if (acl_ids->z_fgid == 0) {
428870ff
BB		 1776 if (dzp->z_mode & S_ISGID) {
1777 char *domain;
1778 uint32_t rid;
1779
572e2857 1780 acl_ids->z_fgid = dzp->z_gid;
3558fd73 1781 gid = zfs_fuid_map_id(zsb, acl_ids->z_fgid,
34dc7c2f 1782 cr, ZFS_GROUP);
428870ff 1783
3558fd73 1784 if (zsb->z_use_fuids &&
428870ff
BB		 1785 IS_EPHEMERAL(acl_ids->z_fgid)) {
1786 domain = zfs_fuid_idx_domain(
3558fd73 1787 &zsb->z_fuid_idx,
428870ff
BB		 1788 FUID_INDEX(acl_ids->z_fgid));
1789 rid = FUID_RID(acl_ids->z_fgid);
1790 zfs_fuid_node_add(&acl_ids->z_fuidp,
1791 domain, rid,
1792 FUID_INDEX(acl_ids->z_fgid),
1793 acl_ids->z_fgid, ZFS_GROUP);
1794 }
34dc7c2f 1795 } else {
3558fd73 1796 acl_ids->z_fgid = zfs_fuid_create_cred(zsb,
9babb374 1797 ZFS_GROUP, cr, &acl_ids->z_fuidp);
34dc7c2f
BB		 1798 gid = crgetgid(cr);
1799 }
1800 }
1801 }
a405c8a6 1802#endif /* HAVE_KSID */
34dc7c2f
BB		 1803
1804 /*
1805 * If we're creating a directory, and the parent directory has the
1806 * set-GID bit set, set in on the new directory.
1807 * Otherwise, if the user is neither privileged nor a member of the
1808 * file's new group, clear the file's set-GID bit.
1809 */
1810
428870ff 1811 if (!(flag & IS_ROOT_NODE) && (dzp->z_mode & S_ISGID) &&
3558fd73 1812 (S_ISDIR(vap->va_mode))) {
9babb374 1813 acl_ids->z_mode |= S_ISGID;
34dc7c2f 1814 } else {
9babb374 1815 if ((acl_ids->z_mode & S_ISGID) &&
34dc7c2f 1816 secpolicy_vnode_setids_setgids(cr, gid) != 0)
9babb374 1817 acl_ids->z_mode &= ~S_ISGID;
34dc7c2f
BB		 1818 }
1819
9babb374 1820 if (acl_ids->z_aclp == NULL) {
572e2857 1821 mutex_enter(&dzp->z_acl_lock);
9babb374 1822 mutex_enter(&dzp->z_lock);
3558fd73 1823 if (!(flag & IS_ROOT_NODE) && (S_ISDIR(ZTOI(dzp)->i_mode) &&
428870ff
BB		 1824 (dzp->z_pflags & ZFS_INHERIT_ACE)) &&
1825 !(dzp->z_pflags & ZFS_XATTR)) {
572e2857
BB		 1826 VERIFY(0 == zfs_acl_node_read(dzp, B_TRUE,
1827 &paclp, B_FALSE));
3558fd73
BB		 1828 acl_ids->z_aclp = zfs_acl_inherit(zsb,
1829 vap->va_mode, paclp, acl_ids->z_mode, &need_chmod);
428870ff 1830 inherited = B_TRUE;
34dc7c2f 1831 } else {
9babb374
BB		 1832 acl_ids->z_aclp =
1833 zfs_acl_alloc(zfs_acl_version_zp(dzp));
428870ff 1834 acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL;
9babb374
BB		 1835 }
1836 mutex_exit(&dzp->z_lock);
572e2857 1837 mutex_exit(&dzp->z_acl_lock);
9babb374 1838 if (need_chmod) {
3558fd73 1839 acl_ids->z_aclp->z_hints |= S_ISDIR(vap->va_mode) ?
9babb374 1840 ZFS_ACL_AUTO_INHERIT : 0;
3558fd73 1841 zfs_acl_chmod(zsb, acl_ids->z_mode, acl_ids->z_aclp);
34dc7c2f 1842 }
34dc7c2f
BB		 1843 }
1844
428870ff
BB		 1845 if (inherited || vsecp) {
1846 acl_ids->z_mode = zfs_mode_compute(acl_ids->z_mode,
1847 acl_ids->z_aclp, &acl_ids->z_aclp->z_hints,
1848 acl_ids->z_fuid, acl_ids->z_fgid);
1849 if (ace_trivial_common(acl_ids->z_aclp, 0, zfs_ace_walk) == 0)
1850 acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL;
1851 }
1852
9babb374
BB		 1853 return (0);
1854}
34dc7c2f 1855
9babb374
BB		 1856/*
1857 * Free ACL and fuid_infop, but not the acl_ids structure
1858 */
1859void
1860zfs_acl_ids_free(zfs_acl_ids_t *acl_ids)
1861{
1862 if (acl_ids->z_aclp)
1863 zfs_acl_free(acl_ids->z_aclp);
1864 if (acl_ids->z_fuidp)
1865 zfs_fuid_info_free(acl_ids->z_fuidp);
1866 acl_ids->z_aclp = NULL;
1867 acl_ids->z_fuidp = NULL;
1868}
34dc7c2f 1869
9babb374 1870boolean_t
3558fd73 1871zfs_acl_ids_overquota(zfs_sb_t *zsb, zfs_acl_ids_t *acl_ids)
9babb374 1872{
3558fd73
BB		 1873 return (zfs_fuid_overquota(zsb, B_FALSE, acl_ids->z_fuid) ||
1874 zfs_fuid_overquota(zsb, B_TRUE, acl_ids->z_fgid));
34dc7c2f
BB		 1875}
1876
1877/*
d3cc8b15 1878 * Retrieve a file's ACL
34dc7c2f
BB		 1879 */
1880int
1881zfs_getacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
1882{
1883 zfs_acl_t *aclp;
1884 ulong_t mask;
1885 int error;
1886 int count = 0;
1887 int largeace = 0;
1888
1889 mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT |
1890 VSA_ACE_ACLFLAGS | VSA_ACE_ALLTYPES);
1891
34dc7c2f 1892 if (mask == 0)
2e528b49 1893 return (SET_ERROR(ENOSYS));
34dc7c2f 1894
149e873a 1895 if ((error = zfs_zaccess(zp, ACE_READ_ACL, 0, skipaclchk, cr)))
428870ff
BB		 1896 return (error);
1897
34dc7c2f
BB		 1898 mutex_enter(&zp->z_acl_lock);
1899
572e2857 1900 error = zfs_acl_node_read(zp, B_FALSE, &aclp, B_FALSE);
34dc7c2f
BB		 1901 if (error != 0) {
1902 mutex_exit(&zp->z_acl_lock);
1903 return (error);
1904 }
1905
1906 /*
1907 * Scan ACL to determine number of ACEs
1908 */
428870ff 1909 if ((zp->z_pflags & ZFS_ACL_OBJ_ACE) && !(mask & VSA_ACE_ALLTYPES)) {
34dc7c2f
BB		 1910 void *zacep = NULL;
1911 uint64_t who;
1912 uint32_t access_mask;
1913 uint16_t type, iflags;
1914
149e873a
BB		 1915 while ((zacep = zfs_acl_next_ace(aclp, zacep,
1916 &who, &access_mask, &iflags, &type))) {
34dc7c2f
BB		 1917 switch (type) {
1918 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1919 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1920 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1921 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
1922 largeace++;
1923 continue;
1924 default:
1925 count++;
1926 }
1927 }
1928 vsecp->vsa_aclcnt = count;
1929 } else
428870ff 1930 count = (int)aclp->z_acl_count;
34dc7c2f
BB		 1931
1932 if (mask & VSA_ACECNT) {
1933 vsecp->vsa_aclcnt = count;
1934 }
1935
1936 if (mask & VSA_ACE) {
1937 size_t aclsz;
1938
34dc7c2f
BB		 1939 aclsz = count * sizeof (ace_t) +
1940 sizeof (ace_object_t) * largeace;
1941
1942 vsecp->vsa_aclentp = kmem_alloc(aclsz, KM_SLEEP);
1943 vsecp->vsa_aclentsz = aclsz;
1944
1945 if (aclp->z_version == ZFS_ACL_VERSION_FUID)
3558fd73 1946 zfs_copy_fuid_2_ace(ZTOZSB(zp), aclp, cr,
34dc7c2f
BB		 1947 vsecp->vsa_aclentp, !(mask & VSA_ACE_ALLTYPES));
1948 else {
428870ff
BB		 1949 zfs_acl_node_t *aclnode;
1950 void *start = vsecp->vsa_aclentp;
1951
1952 for (aclnode = list_head(&aclp->z_acl); aclnode;
1953 aclnode = list_next(&aclp->z_acl, aclnode)) {
1954 bcopy(aclnode->z_acldata, start,
1955 aclnode->z_size);
1956 start = (caddr_t)start + aclnode->z_size;
1957 }
1958 ASSERT((caddr_t)start - (caddr_t)vsecp->vsa_aclentp ==
1959 aclp->z_acl_bytes);
34dc7c2f
BB		 1960 }
1961 }
1962 if (mask & VSA_ACE_ACLFLAGS) {
1963 vsecp->vsa_aclflags = 0;
428870ff 1964 if (zp->z_pflags & ZFS_ACL_DEFAULTED)
34dc7c2f 1965 vsecp->vsa_aclflags |= ACL_DEFAULTED;
428870ff 1966 if (zp->z_pflags & ZFS_ACL_PROTECTED)
34dc7c2f 1967 vsecp->vsa_aclflags |= ACL_PROTECTED;
428870ff 1968 if (zp->z_pflags & ZFS_ACL_AUTO_INHERIT)
34dc7c2f
BB		 1969 vsecp->vsa_aclflags |= ACL_AUTO_INHERIT;
1970 }
1971
1972 mutex_exit(&zp->z_acl_lock);
1973
34dc7c2f
BB		 1974 return (0);
1975}
1976
1977int
3558fd73 1978zfs_vsec_2_aclp(zfs_sb_t *zsb, umode_t obj_mode,
9babb374 1979 vsecattr_t *vsecp, cred_t *cr, zfs_fuid_info_t **fuidp, zfs_acl_t **zaclp)
34dc7c2f
BB		 1980{
1981 zfs_acl_t *aclp;
1982 zfs_acl_node_t *aclnode;
1983 int aclcnt = vsecp->vsa_aclcnt;
1984 int error;
1985
1986 if (vsecp->vsa_aclcnt > MAX_ACL_ENTRIES || vsecp->vsa_aclcnt <= 0)
2e528b49 1987 return (SET_ERROR(EINVAL));
34dc7c2f 1988
3558fd73 1989 aclp = zfs_acl_alloc(zfs_acl_version(zsb->z_version));
34dc7c2f
BB		 1990
1991 aclp->z_hints = 0;
1992 aclnode = zfs_acl_node_alloc(aclcnt * sizeof (zfs_object_ace_t));
1993 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
3558fd73 1994 if ((error = zfs_copy_ace_2_oldace(obj_mode, aclp,
34dc7c2f
BB		 1995 (ace_t *)vsecp->vsa_aclentp, aclnode->z_acldata,
1996 aclcnt, &aclnode->z_size)) != 0) {
1997 zfs_acl_free(aclp);
1998 zfs_acl_node_free(aclnode);
1999 return (error);
2000 }
2001 } else {
3558fd73 2002 if ((error = zfs_copy_ace_2_fuid(zsb, obj_mode, aclp,
34dc7c2f 2003 vsecp->vsa_aclentp, aclnode->z_acldata, aclcnt,
9babb374 2004 &aclnode->z_size, fuidp, cr)) != 0) {
34dc7c2f
BB		 2005 zfs_acl_free(aclp);
2006 zfs_acl_node_free(aclnode);
2007 return (error);
2008 }
2009 }
2010 aclp->z_acl_bytes = aclnode->z_size;
2011 aclnode->z_ace_count = aclcnt;
2012 aclp->z_acl_count = aclcnt;
2013 list_insert_head(&aclp->z_acl, aclnode);
2014
2015 /*
2016 * If flags are being set then add them to z_hints
2017 */
2018 if (vsecp->vsa_mask & VSA_ACE_ACLFLAGS) {
2019 if (vsecp->vsa_aclflags & ACL_PROTECTED)
2020 aclp->z_hints |= ZFS_ACL_PROTECTED;
2021 if (vsecp->vsa_aclflags & ACL_DEFAULTED)
2022 aclp->z_hints |= ZFS_ACL_DEFAULTED;
2023 if (vsecp->vsa_aclflags & ACL_AUTO_INHERIT)
2024 aclp->z_hints |= ZFS_ACL_AUTO_INHERIT;
2025 }
2026
2027 *zaclp = aclp;
2028
2029 return (0);
2030}
2031
2032/*
d3cc8b15 2033 * Set a file's ACL
34dc7c2f
BB		 2034 */
2035int
2036zfs_setacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
2037{
3558fd73
BB		 2038 zfs_sb_t *zsb = ZTOZSB(zp);
2039 zilog_t *zilog = zsb->z_log;
34dc7c2f
BB		 2040 ulong_t mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT);
2041 dmu_tx_t *tx;
2042 int error;
2043 zfs_acl_t *aclp;
2044 zfs_fuid_info_t *fuidp = NULL;
9babb374 2045 boolean_t fuid_dirtied;
572e2857 2046 uint64_t acl_obj;
34dc7c2f
BB		 2047
2048 if (mask == 0)
2e528b49 2049 return (SET_ERROR(ENOSYS));
34dc7c2f 2050
428870ff 2051 if (zp->z_pflags & ZFS_IMMUTABLE)
2e528b49 2052 return (SET_ERROR(EPERM));
34dc7c2f 2053
149e873a 2054 if ((error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr)))
34dc7c2f
BB		 2055 return (error);
2056
3558fd73 2057 error = zfs_vsec_2_aclp(zsb, ZTOI(zp)->i_mode, vsecp, cr, &fuidp,
9babb374 2058 &aclp);
34dc7c2f
BB		 2059 if (error)
2060 return (error);
2061
2062 /*
2063 * If ACL wide flags aren't being set then preserve any
2064 * existing flags.
2065 */
2066 if (!(vsecp->vsa_mask & VSA_ACE_ACLFLAGS)) {
428870ff
BB		 2067 aclp->z_hints |=
2068 (zp->z_pflags & V4_ACL_WIDE_FLAGS);
34dc7c2f
BB		 2069 }
2070top:
34dc7c2f 2071 mutex_enter(&zp->z_acl_lock);
572e2857 2072 mutex_enter(&zp->z_lock);
34dc7c2f 2073
3558fd73 2074 tx = dmu_tx_create(zsb->z_os);
428870ff
BB		 2075
2076 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
2077
3558fd73 2078 fuid_dirtied = zsb->z_fuid_dirty;
428870ff 2079 if (fuid_dirtied)
3558fd73 2080 zfs_fuid_txhold(zsb, tx);
428870ff
BB		 2081
2082 /*
2083 * If old version and ACL won't fit in bonus and we aren't
2084 * upgrading then take out necessary DMU holds
2085 */
2086
572e2857 2087 if ((acl_obj = zfs_external_acl(zp)) != 0) {
3558fd73 2088 if (zsb->z_version >= ZPL_VERSION_FUID &&
572e2857
BB		 2089 zfs_znode_acl_version(zp) <= ZFS_ACL_VERSION_INITIAL) {
2090 dmu_tx_hold_free(tx, acl_obj, 0,
428870ff 2091 DMU_OBJECT_END);
572e2857
BB		 2092 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
2093 aclp->z_acl_bytes);
34dc7c2f 2094 } else {
572e2857 2095 dmu_tx_hold_write(tx, acl_obj, 0, aclp->z_acl_bytes);
34dc7c2f 2096 }
428870ff 2097 } else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) {
34dc7c2f
BB		 2098 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, aclp->z_acl_bytes);
2099 }
34dc7c2f 2100
428870ff 2101 zfs_sa_upgrade_txholds(tx, zp);
fb5f0bc8 2102 error = dmu_tx_assign(tx, TXG_NOWAIT);
34dc7c2f
BB		 2103 if (error) {
2104 mutex_exit(&zp->z_acl_lock);
2105 mutex_exit(&zp->z_lock);
2106
fb5f0bc8 2107 if (error == ERESTART) {
34dc7c2f
BB		 2108 dmu_tx_wait(tx);
2109 dmu_tx_abort(tx);
2110 goto top;
2111 }
2112 dmu_tx_abort(tx);
2113 zfs_acl_free(aclp);
2114 return (error);
2115 }
2116
9babb374 2117 error = zfs_aclset_common(zp, aclp, cr, tx);
34dc7c2f 2118 ASSERT(error == 0);
572e2857 2119 ASSERT(zp->z_acl_cached == NULL);
45d1cae3 2120 zp->z_acl_cached = aclp;
34dc7c2f 2121
9babb374 2122 if (fuid_dirtied)
3558fd73 2123 zfs_fuid_sync(zsb, tx);
9babb374 2124
34dc7c2f
BB		 2125 zfs_log_acl(zilog, tx, zp, vsecp, fuidp);
2126
2127 if (fuidp)
2128 zfs_fuid_info_free(fuidp);
34dc7c2f 2129 dmu_tx_commit(tx);
c60bc1fb 2130
34dc7c2f 2131 mutex_exit(&zp->z_lock);
572e2857 2132 mutex_exit(&zp->z_acl_lock);
34dc7c2f
BB		 2133
2134 return (error);
2135}
2136
2137/*
9babb374
BB		 2138 * Check accesses of interest (AoI) against attributes of the dataset
2139 * such as read-only. Returns zero if no AoI conflict with dataset
2140 * attributes, otherwise an appropriate errno is returned.
34dc7c2f
BB		 2141 */
2142static int
9babb374 2143zfs_zaccess_dataset_check(znode_t *zp, uint32_t v4_mode)
34dc7c2f 2144{
2cf7f52b 2145 if ((v4_mode & WRITE_MASK) && (zfs_is_readonly(ZTOZSB(zp))) &&
3558fd73
BB		 2146 (!S_ISDEV(ZTOI(zp)->i_mode) ||
2147 (S_ISDEV(ZTOI(zp)->i_mode) && (v4_mode & WRITE_MASK_ATTRS)))) {
2e528b49 2148 return (SET_ERROR(EROFS));
34dc7c2f
BB		 2149 }
2150
2151 /*
2152 * Only check for READONLY on non-directories.
2153 */
2154 if ((v4_mode & WRITE_MASK_DATA) &&
3558fd73 2155 ((!S_ISDIR(ZTOI(zp)->i_mode) &&
428870ff 2156 (zp->z_pflags & (ZFS_READONLY | ZFS_IMMUTABLE))) ||
3558fd73 2157 (S_ISDIR(ZTOI(zp)->i_mode) &&
428870ff 2158 (zp->z_pflags & ZFS_IMMUTABLE)))) {
2e528b49 2159 return (SET_ERROR(EPERM));
34dc7c2f
BB		 2160 }
2161
2162 if ((v4_mode & (ACE_DELETE | ACE_DELETE_CHILD)) &&
428870ff 2163 (zp->z_pflags & ZFS_NOUNLINK)) {
2e528b49 2164 return (SET_ERROR(EPERM));
34dc7c2f
BB		 2165 }
2166
2167 if (((v4_mode & (ACE_READ_DATA|ACE_EXECUTE)) &&
428870ff 2168 (zp->z_pflags & ZFS_AV_QUARANTINED))) {
2e528b49 2169 return (SET_ERROR(EACCES));
34dc7c2f
BB		 2170 }
2171
9babb374
BB		 2172 return (0);
2173}
2174
2175/*
2176 * The primary usage of this function is to loop through all of the
2177 * ACEs in the znode, determining what accesses of interest (AoI) to
2178 * the caller are allowed or denied. The AoI are expressed as bits in
2179 * the working_mode parameter. As each ACE is processed, bits covered
2180 * by that ACE are removed from the working_mode. This removal
2181 * facilitates two things. The first is that when the working mode is
2182 * empty (= 0), we know we've looked at all the AoI. The second is
2183 * that the ACE interpretation rules don't allow a later ACE to undo
2184 * something granted or denied by an earlier ACE. Removing the
2185 * discovered access or denial enforces this rule. At the end of
2186 * processing the ACEs, all AoI that were found to be denied are
2187 * placed into the working_mode, giving the caller a mask of denied
2188 * accesses. Returns:
2189 * 0 if all AoI granted
2190 * EACCESS if the denied mask is non-zero
2191 * other error if abnormal failure (e.g., IO error)
2192 *
2193 * A secondary usage of the function is to determine if any of the
2194 * AoI are granted. If an ACE grants any access in
2195 * the working_mode, we immediately short circuit out of the function.
2196 * This mode is chosen by setting anyaccess to B_TRUE. The
2197 * working_mode is not a denied access mask upon exit if the function
2198 * is used in this manner.
2199 */
2200static int
2201zfs_zaccess_aces_check(znode_t *zp, uint32_t *working_mode,
2202 boolean_t anyaccess, cred_t *cr)
2203{
3558fd73 2204 zfs_sb_t *zsb = ZTOZSB(zp);
9babb374
BB		 2205 zfs_acl_t *aclp;
2206 int error;
2207 uid_t uid = crgetuid(cr);
3558fd73 2208 uint64_t who;
9babb374
BB		 2209 uint16_t type, iflags;
2210 uint16_t entry_type;
2211 uint32_t access_mask;
2212 uint32_t deny_mask = 0;
2213 zfs_ace_hdr_t *acep = NULL;
2214 boolean_t checkit;
572e2857
BB		 2215 uid_t gowner;
2216 uid_t fowner;
2217
2218 zfs_fuid_map_ids(zp, cr, &fowner, &gowner);
34dc7c2f
BB		 2219
2220 mutex_enter(&zp->z_acl_lock);
2221
572e2857 2222 error = zfs_acl_node_read(zp, B_FALSE, &aclp, B_FALSE);
34dc7c2f
BB		 2223 if (error != 0) {
2224 mutex_exit(&zp->z_acl_lock);
2225 return (error);
2226 }
2227
428870ff
BB		 2228 ASSERT(zp->z_acl_cached);
2229
149e873a
BB		 2230 while ((acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
2231 &iflags, &type))) {
9babb374 2232 uint32_t mask_matched;
34dc7c2f 2233
b128c09f
BB		 2234 if (!zfs_acl_valid_ace_type(type, iflags))
2235 continue;
2236
3558fd73
BB		 2237 if (S_ISDIR(ZTOI(zp)->i_mode) &&
2238 (iflags & ACE_INHERIT_ONLY_ACE))
34dc7c2f
BB		 2239 continue;
2240
9babb374
BB		 2241 /* Skip ACE if it does not affect any AoI */
2242 mask_matched = (access_mask & *working_mode);
2243 if (!mask_matched)
2244 continue;
2245
34dc7c2f
BB		 2246 entry_type = (iflags & ACE_TYPE_FLAGS);
2247
2248 checkit = B_FALSE;
2249
2250 switch (entry_type) {
2251 case ACE_OWNER:
572e2857 2252 if (uid == fowner)
34dc7c2f
BB		 2253 checkit = B_TRUE;
2254 break;
2255 case OWNING_GROUP:
2256 who = gowner;
2257 /*FALLTHROUGH*/
2258 case ACE_IDENTIFIER_GROUP:
3558fd73 2259 checkit = zfs_groupmember(zsb, who, cr);
34dc7c2f
BB		 2260 break;
2261 case ACE_EVERYONE:
2262 checkit = B_TRUE;
2263 break;
2264
2265 /* USER Entry */
2266 default:
2267 if (entry_type == 0) {
2268 uid_t newid;
2269
3558fd73 2270 newid = zfs_fuid_map_id(zsb, who, cr,
34dc7c2f
BB		 2271 ZFS_ACE_USER);
2272 if (newid != IDMAP_WK_CREATOR_OWNER_UID &&
2273 uid == newid)
2274 checkit = B_TRUE;
2275 break;
2276 } else {
34dc7c2f 2277 mutex_exit(&zp->z_acl_lock);
2e528b49 2278 return (SET_ERROR(EIO));
34dc7c2f
BB		 2279 }
2280 }
2281
2282 if (checkit) {
9babb374
BB		 2283 if (type == DENY) {
2284 DTRACE_PROBE3(zfs__ace__denies,
2285 znode_t *, zp,
2286 zfs_ace_hdr_t *, acep,
2287 uint32_t, mask_matched);
2288 deny_mask |= mask_matched;
2289 } else {
2290 DTRACE_PROBE3(zfs__ace__allows,
2291 znode_t *, zp,
2292 zfs_ace_hdr_t *, acep,
2293 uint32_t, mask_matched);
2294 if (anyaccess) {
2295 mutex_exit(&zp->z_acl_lock);
9babb374
BB		 2296 return (0);
2297 }
34dc7c2f 2298 }
9babb374 2299 *working_mode &= ~mask_matched;
34dc7c2f
BB		 2300 }
2301
2302 /* Are we done? */
2303 if (*working_mode == 0)
2304 break;
2305 }
2306
2307 mutex_exit(&zp->z_acl_lock);
34dc7c2f
BB		 2308
2309 /* Put the found 'denies' back on the working mode */
b128c09f
BB		 2310 if (deny_mask) {
2311 *working_mode |= deny_mask;
2e528b49 2312 return (SET_ERROR(EACCES));
b128c09f
BB		 2313 } else if (*working_mode) {
2314 return (-1);
2315 }
34dc7c2f
BB		 2316
2317 return (0);
2318}
2319
9babb374
BB		 2320/*
2321 * Return true if any access whatsoever granted, we don't actually
2322 * care what access is granted.
2323 */
2324boolean_t
2325zfs_has_access(znode_t *zp, cred_t *cr)
2326{
2327 uint32_t have = ACE_ALL_PERMS;
2328
2329 if (zfs_zaccess_aces_check(zp, &have, B_TRUE, cr) != 0) {
572e2857
BB		 2330 uid_t owner;
2331
3558fd73
BB		 2332 owner = zfs_fuid_map_id(ZTOZSB(zp), zp->z_uid, cr, ZFS_OWNER);
2333 return (secpolicy_vnode_any_access(cr, ZTOI(zp), owner) == 0);
9babb374
BB		 2334 }
2335 return (B_TRUE);
2336}
2337
2338static int
2339zfs_zaccess_common(znode_t *zp, uint32_t v4_mode, uint32_t *working_mode,
2340 boolean_t *check_privs, boolean_t skipaclchk, cred_t *cr)
2341{
3558fd73 2342 zfs_sb_t *zsb = ZTOZSB(zp);
9babb374
BB		 2343 int err;
2344
2345 *working_mode = v4_mode;
2346 *check_privs = B_TRUE;
2347
2348 /*
2349 * Short circuit empty requests
2350 */
3558fd73 2351 if (v4_mode == 0 || zsb->z_replay) {
9babb374
BB		 2352 *working_mode = 0;
2353 return (0);
2354 }
2355
2356 if ((err = zfs_zaccess_dataset_check(zp, v4_mode)) != 0) {
2357 *check_privs = B_FALSE;
2358 return (err);
2359 }
2360
2361 /*
2362 * The caller requested that the ACL check be skipped. This
2363 * would only happen if the caller checked VOP_ACCESS() with a
2364 * 32 bit ACE mask and already had the appropriate permissions.
2365 */
2366 if (skipaclchk) {
2367 *working_mode = 0;
2368 return (0);
2369 }
2370
2371 return (zfs_zaccess_aces_check(zp, working_mode, B_FALSE, cr));
2372}
2373
34dc7c2f
BB		 2374static int
2375zfs_zaccess_append(znode_t *zp, uint32_t *working_mode, boolean_t *check_privs,
2376 cred_t *cr)
2377{
2378 if (*working_mode != ACE_WRITE_DATA)
2e528b49 2379 return (SET_ERROR(EACCES));
34dc7c2f
BB		 2380
2381 return (zfs_zaccess_common(zp, ACE_APPEND_DATA, working_mode,
2382 check_privs, B_FALSE, cr));
2383}
2384
45d1cae3
BB		 2385int
2386zfs_fastaccesschk_execute(znode_t *zdp, cred_t *cr)
2387{
2388 boolean_t owner = B_FALSE;
2389 boolean_t groupmbr = B_FALSE;
2390 boolean_t is_attr;
45d1cae3
BB		 2391 uid_t uid = crgetuid(cr);
2392 int error;
2393
428870ff 2394 if (zdp->z_pflags & ZFS_AV_QUARANTINED)
2e528b49 2395 return (SET_ERROR(EACCES));
45d1cae3 2396
428870ff 2397 is_attr = ((zdp->z_pflags & ZFS_XATTR) &&
3558fd73 2398 (S_ISDIR(ZTOI(zdp)->i_mode)));
45d1cae3
BB		 2399 if (is_attr)
2400 goto slow;
2401
428870ff 2402
45d1cae3
BB		 2403 mutex_enter(&zdp->z_acl_lock);
2404
428870ff 2405 if (zdp->z_pflags & ZFS_NO_EXECS_DENIED) {
45d1cae3
BB		 2406 mutex_exit(&zdp->z_acl_lock);
2407 return (0);
2408 }
2409
572e2857 2410 if (FUID_INDEX(zdp->z_uid) != 0 || FUID_INDEX(zdp->z_gid) != 0) {
45d1cae3
BB		 2411 mutex_exit(&zdp->z_acl_lock);
2412 goto slow;
2413 }
2414
428870ff 2415 if (uid == zdp->z_uid) {
45d1cae3 2416 owner = B_TRUE;
428870ff 2417 if (zdp->z_mode & S_IXUSR) {
45d1cae3
BB		 2418 mutex_exit(&zdp->z_acl_lock);
2419 return (0);
2420 } else {
2421 mutex_exit(&zdp->z_acl_lock);
2422 goto slow;
2423 }
2424 }
428870ff 2425 if (groupmember(zdp->z_gid, cr)) {
45d1cae3 2426 groupmbr = B_TRUE;
428870ff 2427 if (zdp->z_mode & S_IXGRP) {
45d1cae3
BB		 2428 mutex_exit(&zdp->z_acl_lock);
2429 return (0);
2430 } else {
2431 mutex_exit(&zdp->z_acl_lock);
2432 goto slow;
2433 }
2434 }
2435 if (!owner && !groupmbr) {
428870ff 2436 if (zdp->z_mode & S_IXOTH) {
45d1cae3
BB		 2437 mutex_exit(&zdp->z_acl_lock);
2438 return (0);
2439 }
2440 }
2441
2442 mutex_exit(&zdp->z_acl_lock);
2443
2444slow:
2445 DTRACE_PROBE(zfs__fastpath__execute__access__miss);
3558fd73 2446 ZFS_ENTER(ZTOZSB(zdp));
45d1cae3 2447 error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr);
3558fd73 2448 ZFS_EXIT(ZTOZSB(zdp));
45d1cae3
BB		 2449 return (error);
2450}
2451
34dc7c2f 2452/*
428870ff 2453 * Determine whether Access should be granted/denied.
d3cc8b15 2454 *
428870ff
BB		 2455 * The least priv subsytem is always consulted as a basic privilege
2456 * can define any form of access.
34dc7c2f
BB		 2457 */
2458int
2459zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr)
2460{
2461 uint32_t working_mode;
2462 int error;
3558fd73 2463 boolean_t check_privs;
3558fd73 2464 znode_t *check_zp = zp;
428870ff 2465 mode_t needed_bits;
572e2857 2466 uid_t owner;
34dc7c2f 2467
34dc7c2f
BB		 2468 /*
2469 * If attribute then validate against base file
2470 */
e89260a1 2471 if ((zp->z_pflags & ZFS_XATTR) && S_ISDIR(ZTOI(zp)->i_mode)) {
428870ff
BB		 2472 uint64_t parent;
2473
e89260a1
BB		 2474 rw_enter(&zp->z_xattr_lock, RW_READER);
2475 if (zp->z_xattr_parent) {
2476 check_zp = zp->z_xattr_parent;
2477 rw_exit(&zp->z_xattr_lock);
428870ff 2478
e89260a1
BB		 2479 /*
2480 * Verify a lookup yields the same znode.
2481 */
2482 ASSERT3S(sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(
2483 ZTOZSB(zp)), &parent, sizeof (parent)), ==, 0);
2484 ASSERT3U(check_zp->z_id, ==, parent);
2485 } else {
2486 rw_exit(&zp->z_xattr_lock);
34dc7c2f 2487
e89260a1
BB		 2488 error = sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(
2489 ZTOZSB(zp)), &parent, sizeof (parent));
2490 if (error)
2491 return (error);
2492
2493 /*
2494 * Cache the lookup on the parent file znode as
2495 * zp->z_xattr_parent and hold a reference. This
2496 * effectively pins the parent in memory until all
2497 * child xattr znodes have been destroyed and
2498 * release their references in zfs_inode_destroy().
2499 */
2500 error = zfs_zget(ZTOZSB(zp), parent, &check_zp);
2501 if (error)
d1d7e268 2502 return (error);
e89260a1
BB		 2503
2504 rw_enter(&zp->z_xattr_lock, RW_WRITER);
2505 if (zp->z_xattr_parent == NULL)
2506 zp->z_xattr_parent = check_zp;
2507 rw_exit(&zp->z_xattr_lock);
2508 }
34dc7c2f
BB		 2509
2510 /*
2511 * fixup mode to map to xattr perms
2512 */
2513
2514 if (mode & (ACE_WRITE_DATA|ACE_APPEND_DATA)) {
2515 mode &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
2516 mode |= ACE_WRITE_NAMED_ATTRS;
2517 }
2518
2519 if (mode & (ACE_READ_DATA|ACE_EXECUTE)) {
2520 mode &= ~(ACE_READ_DATA|ACE_EXECUTE);
2521 mode |= ACE_READ_NAMED_ATTRS;
2522 }
2523 }
2524
3558fd73 2525 owner = zfs_fuid_map_id(ZTOZSB(zp), zp->z_uid, cr, ZFS_OWNER);
428870ff 2526 /*
3558fd73
BB		 2527 * Map the bits required to the standard inode flags
2528 * S_IRUSR|S_IWUSR|S_IXUSR in the needed_bits. Map the bits
2529 * mapped by working_mode (currently missing) in missing_bits.
428870ff
BB		 2530 * Call secpolicy_vnode_access2() with (needed_bits & ~checkmode),
2531 * needed_bits.
2532 */
2533 needed_bits = 0;
2534
2535 working_mode = mode;
2536 if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES)) &&
572e2857 2537 owner == crgetuid(cr))
428870ff
BB		 2538 working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES);
2539
2540 if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS|
2541 ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE))
3558fd73 2542 needed_bits |= S_IRUSR;
428870ff
BB		 2543 if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
2544 ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
3558fd73 2545 needed_bits |= S_IWUSR;
428870ff 2546 if (working_mode & ACE_EXECUTE)
3558fd73 2547 needed_bits |= S_IXUSR;
428870ff 2548
34dc7c2f
BB		 2549 if ((error = zfs_zaccess_common(check_zp, mode, &working_mode,
2550 &check_privs, skipaclchk, cr)) == 0) {
3558fd73 2551 return (secpolicy_vnode_access2(cr, ZTOI(zp), owner,
428870ff 2552 needed_bits, needed_bits));
34dc7c2f
BB		 2553 }
2554
2555 if (error && !check_privs) {
34dc7c2f
BB		 2556 return (error);
2557 }
2558
2559 if (error && (flags & V_APPEND)) {
2560 error = zfs_zaccess_append(zp, &working_mode, &check_privs, cr);
2561 }
2562
2563 if (error && check_privs) {
34dc7c2f
BB		 2564 mode_t checkmode = 0;
2565
34dc7c2f
BB		 2566 /*
2567 * First check for implicit owner permission on
2568 * read_acl/read_attributes
2569 */
2570
2571 error = 0;
2572 ASSERT(working_mode != 0);
2573
2574 if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES) &&
572e2857 2575 owner == crgetuid(cr)))
34dc7c2f
BB		 2576 working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES);
2577
2578 if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS|
b128c09f 2579 ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE))
3558fd73 2580 checkmode |= S_IRUSR;
34dc7c2f 2581 if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
b128c09f 2582 ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
3558fd73 2583 checkmode |= S_IWUSR;
34dc7c2f 2584 if (working_mode & ACE_EXECUTE)
3558fd73 2585 checkmode |= S_IXUSR;
34dc7c2f 2586
3558fd73 2587 error = secpolicy_vnode_access2(cr, ZTOI(check_zp), owner,
428870ff 2588 needed_bits & ~checkmode, needed_bits);
34dc7c2f
BB		 2589
2590 if (error == 0 && (working_mode & ACE_WRITE_OWNER))
572e2857 2591 error = secpolicy_vnode_chown(cr, owner);
34dc7c2f 2592 if (error == 0 && (working_mode & ACE_WRITE_ACL))
572e2857 2593 error = secpolicy_vnode_setdac(cr, owner);
34dc7c2f
BB		 2594
2595 if (error == 0 && (working_mode &
2596 (ACE_DELETE|ACE_DELETE_CHILD)))
2597 error = secpolicy_vnode_remove(cr);
2598
b128c09f 2599 if (error == 0 && (working_mode & ACE_SYNCHRONIZE)) {
572e2857 2600 error = secpolicy_vnode_chown(cr, owner);
b128c09f 2601 }
34dc7c2f
BB		 2602 if (error == 0) {
2603 /*
2604 * See if any bits other than those already checked
2605 * for are still present. If so then return EACCES
2606 */
2607 if (working_mode & ~(ZFS_CHECKED_MASKS)) {
2e528b49 2608 error = SET_ERROR(EACCES);
34dc7c2f
BB		 2609 }
2610 }
428870ff 2611 } else if (error == 0) {
3558fd73 2612 error = secpolicy_vnode_access2(cr, ZTOI(zp), owner,
428870ff 2613 needed_bits, needed_bits);
34dc7c2f
BB		 2614 }
2615
34dc7c2f
BB		 2616 return (error);
2617}
2618
2619/*
3558fd73 2620 * Translate traditional unix S_IRUSR/S_IWUSR/S_IXUSR mode into
34dc7c2f
BB		 2621 * native ACL format and call zfs_zaccess()
2622 */
2623int
2624zfs_zaccess_rwx(znode_t *zp, mode_t mode, int flags, cred_t *cr)
2625{
2626 return (zfs_zaccess(zp, zfs_unix_to_v4(mode >> 6), flags, B_FALSE, cr));
2627}
2628
2629/*
2630 * Access function for secpolicy_vnode_setattr
2631 */
2632int
2633zfs_zaccess_unix(znode_t *zp, mode_t mode, cred_t *cr)
2634{
2635 int v4_mode = zfs_unix_to_v4(mode >> 6);
2636
2637 return (zfs_zaccess(zp, v4_mode, 0, B_FALSE, cr));
2638}
2639
2640static int
2641zfs_delete_final_check(znode_t *zp, znode_t *dzp,
428870ff 2642 mode_t available_perms, cred_t *cr)
34dc7c2f
BB		 2643{
2644 int error;
572e2857
BB		 2645 uid_t downer;
2646
3558fd73 2647 downer = zfs_fuid_map_id(ZTOZSB(dzp), dzp->z_uid, cr, ZFS_OWNER);
34dc7c2f 2648
3558fd73
BB		 2649 error = secpolicy_vnode_access2(cr, ZTOI(dzp),
2650 downer, available_perms, S_IWUSR|S_IXUSR);
34dc7c2f
BB		 2651
2652 if (error == 0)
2653 error = zfs_sticky_remove_access(dzp, zp, cr);
2654
2655 return (error);
2656}
2657
2658/*
2659 * Determine whether Access should be granted/deny, without
2660 * consulting least priv subsystem.
2661 *
34dc7c2f
BB		 2662 * The following chart is the recommended NFSv4 enforcement for
2663 * ability to delete an object.
2664 *
2665 * -------------------------------------------------------
2666 * | Parent Dir | Target Object Permissions |
2667 * | permissions | |
2668 * -------------------------------------------------------
2669 * | | ACL Allows | ACL Denies| Delete |
2670 * | | Delete | Delete | unspecified|
2671 * -------------------------------------------------------
2672 * | ACL Allows | Permit | Permit | Permit |
2673 * | DELETE_CHILD | |
2674 * -------------------------------------------------------
2675 * | ACL Denies | Permit | Deny | Deny |
2676 * | DELETE_CHILD | | | |
2677 * -------------------------------------------------------
2678 * | ACL specifies | | | |
2679 * | only allow | Permit | Permit | Permit |
2680 * | write and | | | |
2681 * | execute | | | |
2682 * -------------------------------------------------------
2683 * | ACL denies | | | |
2684 * | write and | Permit | Deny | Deny |
2685 * | execute | | | |
2686 * -------------------------------------------------------
2687 * ^
2688 * |
2689 * No search privilege, can't even look up file?
2690 *
2691 */
2692int
2693zfs_zaccess_delete(znode_t *dzp, znode_t *zp, cred_t *cr)
2694{
2695 uint32_t dzp_working_mode = 0;
2696 uint32_t zp_working_mode = 0;
2697 int dzp_error, zp_error;
428870ff 2698 mode_t available_perms;
34dc7c2f
BB		 2699 boolean_t dzpcheck_privs = B_TRUE;
2700 boolean_t zpcheck_privs = B_TRUE;
2701
2702 /*
2703 * We want specific DELETE permissions to
2704 * take precedence over WRITE/EXECUTE. We don't
2705 * want an ACL such as this to mess us up.
2706 * user:joe:write_data:deny,user:joe:delete:allow
2707 *
2708 * However, deny permissions may ultimately be overridden
2709 * by secpolicy_vnode_access().
2710 *
2711 * We will ask for all of the necessary permissions and then
2712 * look at the working modes from the directory and target object
2713 * to determine what was found.
2714 */
2715
428870ff 2716 if (zp->z_pflags & (ZFS_IMMUTABLE | ZFS_NOUNLINK))
2e528b49 2717 return (SET_ERROR(EPERM));
34dc7c2f
BB		 2718
2719 /*
b128c09f 2720 * First row
34dc7c2f
BB		 2721 * If the directory permissions allow the delete, we are done.
2722 */
b128c09f 2723 if ((dzp_error = zfs_zaccess_common(dzp, ACE_DELETE_CHILD,
34dc7c2f
BB		 2724 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0)
2725 return (0);
2726
2727 /*
2728 * If target object has delete permission then we are done
2729 */
2730 if ((zp_error = zfs_zaccess_common(zp, ACE_DELETE, &zp_working_mode,
2731 &zpcheck_privs, B_FALSE, cr)) == 0)
2732 return (0);
2733
b128c09f
BB		 2734 ASSERT(dzp_error && zp_error);
2735
34dc7c2f
BB		 2736 if (!dzpcheck_privs)
2737 return (dzp_error);
b128c09f 2738 if (!zpcheck_privs)
34dc7c2f
BB		 2739 return (zp_error);
2740
34dc7c2f
BB		 2741 /*
2742 * Second row
b128c09f
BB		 2743 *
2744 * If directory returns EACCES then delete_child was denied
2745 * due to deny delete_child. In this case send the request through
2746 * secpolicy_vnode_remove(). We don't use zfs_delete_final_check()
2747 * since that *could* allow the delete based on write/execute permission
2748 * and we want delete permissions to override write/execute.
34dc7c2f
BB		 2749 */
2750
34dc7c2f 2751 if (dzp_error == EACCES)
b128c09f 2752 return (secpolicy_vnode_remove(cr));
34dc7c2f
BB		 2753
2754 /*
2755 * Third Row
2756 * only need to see if we have write/execute on directory.
2757 */
2758
428870ff
BB		 2759 dzp_error = zfs_zaccess_common(dzp, ACE_EXECUTE|ACE_WRITE_DATA,
2760 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr);
34dc7c2f 2761
428870ff 2762 if (dzp_error != 0 && !dzpcheck_privs)
b128c09f
BB		 2763 return (dzp_error);
2764
34dc7c2f 2765 /*
b128c09f 2766 * Fourth row
34dc7c2f
BB		 2767 */
2768
3558fd73
BB		 2769 available_perms = (dzp_working_mode & ACE_WRITE_DATA) ? 0 : S_IWUSR;
2770 available_perms |= (dzp_working_mode & ACE_EXECUTE) ? 0 : S_IXUSR;
34dc7c2f 2771
428870ff 2772 return (zfs_delete_final_check(zp, dzp, available_perms, cr));
b128c09f 2773
34dc7c2f
BB		 2774}
2775
2776int
2777zfs_zaccess_rename(znode_t *sdzp, znode_t *szp, znode_t *tdzp,
2778 znode_t *tzp, cred_t *cr)
2779{
2780 int add_perm;
2781 int error;
2782
428870ff 2783 if (szp->z_pflags & ZFS_AV_QUARANTINED)
2e528b49 2784 return (SET_ERROR(EACCES));
34dc7c2f 2785
3558fd73 2786 add_perm = S_ISDIR(ZTOI(szp)->i_mode) ?
34dc7c2f
BB		 2787 ACE_ADD_SUBDIRECTORY : ACE_ADD_FILE;
2788
2789 /*
2790 * Rename permissions are combination of delete permission +
2791 * add file/subdir permission.
2792 */
2793
2794 /*
2795 * first make sure we do the delete portion.
2796 *
2797 * If that succeeds then check for add_file/add_subdir permissions
2798 */
2799
149e873a 2800 if ((error = zfs_zaccess_delete(sdzp, szp, cr)))
34dc7c2f
BB		 2801 return (error);
2802
2803 /*
2804 * If we have a tzp, see if we can delete it?
2805 */
2806 if (tzp) {
149e873a 2807 if ((error = zfs_zaccess_delete(tdzp, tzp, cr)))
34dc7c2f
BB		 2808 return (error);
2809 }
2810
2811 /*
2812 * Now check for add permissions
2813 */
2814 error = zfs_zaccess(tdzp, add_perm, 0, B_FALSE, cr);
2815
2816 return (error);
2817}
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