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.
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.
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]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
27 #include <sys/types.h>
28 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/sysmacros.h>
32 #include <sys/resource.h>
34 #include <sys/vnode.h>
39 #include <sys/cmn_err.h>
40 #include <sys/errno.h>
41 #include <sys/unistd.h>
43 #include <sys/fs/zfs.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>
52 #include <sys/dnode.h>
55 #include "fs/fs_subr.h"
56 #include <acl/acl_common.h>
58 #define ALLOW ACE_ACCESS_ALLOWED_ACE_TYPE
59 #define DENY ACE_ACCESS_DENIED_ACE_TYPE
60 #define MAX_ACE_TYPE ACE_SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE
61 #define MIN_ACE_TYPE ALLOW
63 #define OWNING_GROUP (ACE_GROUP|ACE_IDENTIFIER_GROUP)
64 #define EVERYONE_ALLOW_MASK (ACE_READ_ACL|ACE_READ_ATTRIBUTES | \
65 ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE)
66 #define EVERYONE_DENY_MASK (ACE_WRITE_ACL|ACE_WRITE_OWNER | \
67 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
68 #define OWNER_ALLOW_MASK (ACE_WRITE_ACL | ACE_WRITE_OWNER | \
69 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
71 #define ZFS_CHECKED_MASKS (ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_READ_DATA| \
72 ACE_READ_NAMED_ATTRS|ACE_WRITE_DATA|ACE_WRITE_ATTRIBUTES| \
73 ACE_WRITE_NAMED_ATTRS|ACE_APPEND_DATA|ACE_EXECUTE|ACE_WRITE_OWNER| \
74 ACE_WRITE_ACL|ACE_DELETE|ACE_DELETE_CHILD|ACE_SYNCHRONIZE)
76 #define WRITE_MASK_DATA (ACE_WRITE_DATA|ACE_APPEND_DATA|ACE_WRITE_NAMED_ATTRS)
77 #define WRITE_MASK_ATTRS (ACE_WRITE_ACL|ACE_WRITE_OWNER|ACE_WRITE_ATTRIBUTES| \
78 ACE_DELETE|ACE_DELETE_CHILD)
79 #define WRITE_MASK (WRITE_MASK_DATA|WRITE_MASK_ATTRS)
81 #define OGE_CLEAR (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
82 ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
84 #define OKAY_MASK_BITS (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
85 ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
87 #define ALL_INHERIT (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE | \
88 ACE_NO_PROPAGATE_INHERIT_ACE|ACE_INHERIT_ONLY_ACE|ACE_INHERITED_ACE)
90 #define RESTRICTED_CLEAR (ACE_WRITE_ACL|ACE_WRITE_OWNER)
92 #define V4_ACL_WIDE_FLAGS (ZFS_ACL_AUTO_INHERIT|ZFS_ACL_DEFAULTED|\
95 #define ZFS_ACL_WIDE_FLAGS (V4_ACL_WIDE_FLAGS|ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|\
98 #define ALL_MODE_EXECS (S_IXUSR | S_IXGRP | S_IXOTH)
101 zfs_ace_v0_get_type(void *acep)
103 return (((zfs_oldace_t *)acep)->z_type);
107 zfs_ace_v0_get_flags(void *acep)
109 return (((zfs_oldace_t *)acep)->z_flags);
113 zfs_ace_v0_get_mask(void *acep)
115 return (((zfs_oldace_t *)acep)->z_access_mask);
119 zfs_ace_v0_get_who(void *acep)
121 return (((zfs_oldace_t *)acep)->z_fuid);
125 zfs_ace_v0_set_type(void *acep, uint16_t type)
127 ((zfs_oldace_t *)acep)->z_type = type;
131 zfs_ace_v0_set_flags(void *acep, uint16_t flags)
133 ((zfs_oldace_t *)acep)->z_flags = flags;
137 zfs_ace_v0_set_mask(void *acep, uint32_t mask)
139 ((zfs_oldace_t *)acep)->z_access_mask = mask;
143 zfs_ace_v0_set_who(void *acep, uint64_t who)
145 ((zfs_oldace_t *)acep)->z_fuid = who;
150 zfs_ace_v0_size(void *acep)
152 return (sizeof (zfs_oldace_t));
156 zfs_ace_v0_abstract_size(void)
158 return (sizeof (zfs_oldace_t));
162 zfs_ace_v0_mask_off(void)
164 return (offsetof(zfs_oldace_t, z_access_mask));
169 zfs_ace_v0_data(void *acep, void **datap)
175 static acl_ops_t zfs_acl_v0_ops = {
178 zfs_ace_v0_get_flags,
179 zfs_ace_v0_set_flags,
185 zfs_ace_v0_abstract_size,
191 zfs_ace_fuid_get_type(void *acep)
193 return (((zfs_ace_hdr_t *)acep)->z_type);
197 zfs_ace_fuid_get_flags(void *acep)
199 return (((zfs_ace_hdr_t *)acep)->z_flags);
203 zfs_ace_fuid_get_mask(void *acep)
205 return (((zfs_ace_hdr_t *)acep)->z_access_mask);
209 zfs_ace_fuid_get_who(void *args)
212 zfs_ace_t *acep = args;
214 entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
216 if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
217 entry_type == ACE_EVERYONE)
219 return (((zfs_ace_t *)acep)->z_fuid);
223 zfs_ace_fuid_set_type(void *acep, uint16_t type)
225 ((zfs_ace_hdr_t *)acep)->z_type = type;
229 zfs_ace_fuid_set_flags(void *acep, uint16_t flags)
231 ((zfs_ace_hdr_t *)acep)->z_flags = flags;
235 zfs_ace_fuid_set_mask(void *acep, uint32_t mask)
237 ((zfs_ace_hdr_t *)acep)->z_access_mask = mask;
241 zfs_ace_fuid_set_who(void *arg, uint64_t who)
243 zfs_ace_t *acep = arg;
245 uint16_t entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
247 if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
248 entry_type == ACE_EVERYONE)
254 zfs_ace_fuid_size(void *acep)
256 zfs_ace_hdr_t *zacep = acep;
259 switch (zacep->z_type) {
260 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
261 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
262 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
263 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
264 return (sizeof (zfs_object_ace_t));
268 (((zfs_ace_hdr_t *)acep)->z_flags & ACE_TYPE_FLAGS);
269 if (entry_type == ACE_OWNER ||
270 entry_type == OWNING_GROUP ||
271 entry_type == ACE_EVERYONE)
272 return (sizeof (zfs_ace_hdr_t));
275 return (sizeof (zfs_ace_t));
280 zfs_ace_fuid_abstract_size(void)
282 return (sizeof (zfs_ace_hdr_t));
286 zfs_ace_fuid_mask_off(void)
288 return (offsetof(zfs_ace_hdr_t, z_access_mask));
292 zfs_ace_fuid_data(void *acep, void **datap)
294 zfs_ace_t *zacep = acep;
295 zfs_object_ace_t *zobjp;
297 switch (zacep->z_hdr.z_type) {
298 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
299 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
300 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
301 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
303 *datap = (caddr_t)zobjp + sizeof (zfs_ace_t);
304 return (sizeof (zfs_object_ace_t) - sizeof (zfs_ace_t));
311 static acl_ops_t zfs_acl_fuid_ops = {
312 zfs_ace_fuid_get_mask,
313 zfs_ace_fuid_set_mask,
314 zfs_ace_fuid_get_flags,
315 zfs_ace_fuid_set_flags,
316 zfs_ace_fuid_get_type,
317 zfs_ace_fuid_set_type,
318 zfs_ace_fuid_get_who,
319 zfs_ace_fuid_set_who,
321 zfs_ace_fuid_abstract_size,
322 zfs_ace_fuid_mask_off,
327 * The following three functions are provided for compatibility with
328 * older ZPL version in order to determine if the file use to have
329 * an external ACL and what version of ACL previously existed on the
330 * file. Would really be nice to not need this, sigh.
333 zfs_external_acl(znode_t *zp)
335 zfs_acl_phys_t acl_phys;
342 * Need to deal with a potential
343 * race where zfs_sa_upgrade could cause
344 * z_isa_sa to change.
346 * If the lookup fails then the state of z_is_sa should have
350 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zp->z_zfsvfs),
351 &acl_phys, sizeof (acl_phys))) == 0)
352 return (acl_phys.z_acl_extern_obj);
355 * after upgrade the SA_ZPL_ZNODE_ACL should have been
358 VERIFY(zp->z_is_sa && error == ENOENT);
364 * Determine size of ACL in bytes
366 * This is more complicated than it should be since we have to deal
367 * with old external ACLs.
370 zfs_acl_znode_info(znode_t *zp, int *aclsize, int *aclcount,
371 zfs_acl_phys_t *aclphys)
373 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
378 ASSERT(MUTEX_HELD(&zp->z_acl_lock));
380 if ((error = sa_size(zp->z_sa_hdl, SA_ZPL_DACL_ACES(zfsvfs),
384 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DACL_COUNT(zfsvfs),
385 &acl_count, sizeof (acl_count))) != 0)
387 *aclcount = acl_count;
389 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zfsvfs),
390 aclphys, sizeof (*aclphys))) != 0)
393 if (aclphys->z_acl_version == ZFS_ACL_VERSION_INITIAL) {
394 *aclsize = ZFS_ACL_SIZE(aclphys->z_acl_size);
395 *aclcount = aclphys->z_acl_size;
397 *aclsize = aclphys->z_acl_size;
398 *aclcount = aclphys->z_acl_count;
405 zfs_znode_acl_version(znode_t *zp)
407 zfs_acl_phys_t acl_phys;
410 return (ZFS_ACL_VERSION_FUID);
415 * Need to deal with a potential
416 * race where zfs_sa_upgrade could cause
417 * z_isa_sa to change.
419 * If the lookup fails then the state of z_is_sa should have
422 if ((error = sa_lookup(zp->z_sa_hdl,
423 SA_ZPL_ZNODE_ACL(zp->z_zfsvfs),
424 &acl_phys, sizeof (acl_phys))) == 0)
425 return (acl_phys.z_acl_version);
428 * After upgrade SA_ZPL_ZNODE_ACL should have
431 VERIFY(zp->z_is_sa && error == ENOENT);
432 return (ZFS_ACL_VERSION_FUID);
438 zfs_acl_version(int version)
440 if (version < ZPL_VERSION_FUID)
441 return (ZFS_ACL_VERSION_INITIAL);
443 return (ZFS_ACL_VERSION_FUID);
447 zfs_acl_version_zp(znode_t *zp)
449 return (zfs_acl_version(zp->z_zfsvfs->z_version));
453 zfs_acl_alloc(int vers)
457 aclp = kmem_zalloc(sizeof (zfs_acl_t), KM_SLEEP);
458 list_create(&aclp->z_acl, sizeof (zfs_acl_node_t),
459 offsetof(zfs_acl_node_t, z_next));
460 aclp->z_version = vers;
461 if (vers == ZFS_ACL_VERSION_FUID)
462 aclp->z_ops = zfs_acl_fuid_ops;
464 aclp->z_ops = zfs_acl_v0_ops;
469 zfs_acl_node_alloc(size_t bytes)
471 zfs_acl_node_t *aclnode;
473 aclnode = kmem_zalloc(sizeof (zfs_acl_node_t), KM_SLEEP);
475 aclnode->z_acldata = kmem_alloc(bytes, KM_SLEEP);
476 aclnode->z_allocdata = aclnode->z_acldata;
477 aclnode->z_allocsize = bytes;
478 aclnode->z_size = bytes;
485 zfs_acl_node_free(zfs_acl_node_t *aclnode)
487 if (aclnode->z_allocsize)
488 kmem_free(aclnode->z_allocdata, aclnode->z_allocsize);
489 kmem_free(aclnode, sizeof (zfs_acl_node_t));
493 zfs_acl_release_nodes(zfs_acl_t *aclp)
495 zfs_acl_node_t *aclnode;
497 while ((aclnode = list_head(&aclp->z_acl))) {
498 list_remove(&aclp->z_acl, aclnode);
499 zfs_acl_node_free(aclnode);
501 aclp->z_acl_count = 0;
502 aclp->z_acl_bytes = 0;
506 zfs_acl_free(zfs_acl_t *aclp)
508 zfs_acl_release_nodes(aclp);
509 list_destroy(&aclp->z_acl);
510 kmem_free(aclp, sizeof (zfs_acl_t));
514 zfs_acl_valid_ace_type(uint_t type, uint_t flags)
521 case ACE_SYSTEM_AUDIT_ACE_TYPE:
522 case ACE_SYSTEM_ALARM_ACE_TYPE:
523 entry_type = flags & ACE_TYPE_FLAGS;
524 return (entry_type == ACE_OWNER ||
525 entry_type == OWNING_GROUP ||
526 entry_type == ACE_EVERYONE || entry_type == 0 ||
527 entry_type == ACE_IDENTIFIER_GROUP);
529 if (type >= MIN_ACE_TYPE && type <= MAX_ACE_TYPE)
536 zfs_ace_valid(vtype_t obj_type, zfs_acl_t *aclp, uint16_t type, uint16_t iflags)
539 * first check type of entry
542 if (!zfs_acl_valid_ace_type(type, iflags))
546 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
547 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
548 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
549 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
550 if (aclp->z_version < ZFS_ACL_VERSION_FUID)
552 aclp->z_hints |= ZFS_ACL_OBJ_ACE;
556 * next check inheritance level flags
559 if (obj_type == VDIR &&
560 (iflags & (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE)))
561 aclp->z_hints |= ZFS_INHERIT_ACE;
563 if (iflags & (ACE_INHERIT_ONLY_ACE|ACE_NO_PROPAGATE_INHERIT_ACE)) {
564 if ((iflags & (ACE_FILE_INHERIT_ACE|
565 ACE_DIRECTORY_INHERIT_ACE)) == 0) {
574 zfs_acl_next_ace(zfs_acl_t *aclp, void *start, uint64_t *who,
575 uint32_t *access_mask, uint16_t *iflags, uint16_t *type)
577 zfs_acl_node_t *aclnode;
582 aclnode = list_head(&aclp->z_acl);
586 aclp->z_next_ace = aclnode->z_acldata;
587 aclp->z_curr_node = aclnode;
588 aclnode->z_ace_idx = 0;
591 aclnode = aclp->z_curr_node;
596 if (aclnode->z_ace_idx >= aclnode->z_ace_count) {
597 aclnode = list_next(&aclp->z_acl, aclnode);
601 aclp->z_curr_node = aclnode;
602 aclnode->z_ace_idx = 0;
603 aclp->z_next_ace = aclnode->z_acldata;
607 if (aclnode->z_ace_idx < aclnode->z_ace_count) {
608 void *acep = aclp->z_next_ace;
612 * Make sure we don't overstep our bounds
614 ace_size = aclp->z_ops.ace_size(acep);
616 if (((caddr_t)acep + ace_size) >
617 ((caddr_t)aclnode->z_acldata + aclnode->z_size)) {
621 *iflags = aclp->z_ops.ace_flags_get(acep);
622 *type = aclp->z_ops.ace_type_get(acep);
623 *access_mask = aclp->z_ops.ace_mask_get(acep);
624 *who = aclp->z_ops.ace_who_get(acep);
625 aclp->z_next_ace = (caddr_t)aclp->z_next_ace + ace_size;
626 aclnode->z_ace_idx++;
628 return ((void *)acep);
635 zfs_ace_walk(void *datap, uint64_t cookie, int aclcnt,
636 uint16_t *flags, uint16_t *type, uint32_t *mask)
638 zfs_acl_t *aclp = datap;
639 zfs_ace_hdr_t *acep = (zfs_ace_hdr_t *)(uintptr_t)cookie;
642 acep = zfs_acl_next_ace(aclp, acep, &who, mask,
644 return ((uint64_t)(uintptr_t)acep);
647 static zfs_acl_node_t *
648 zfs_acl_curr_node(zfs_acl_t *aclp)
650 ASSERT(aclp->z_curr_node);
651 return (aclp->z_curr_node);
655 * Copy ACE to internal ZFS format.
656 * While processing the ACL each ACE will be validated for correctness.
657 * ACE FUIDs will be created later.
660 zfs_copy_ace_2_fuid(zfsvfs_t *zfsvfs, vtype_t obj_type, zfs_acl_t *aclp,
661 void *datap, zfs_ace_t *z_acl, uint64_t aclcnt, size_t *size,
662 zfs_fuid_info_t **fuidp, cred_t *cr)
666 zfs_ace_t *aceptr = z_acl;
668 zfs_object_ace_t *zobjacep;
669 ace_object_t *aceobjp;
671 for (i = 0; i != aclcnt; i++) {
672 aceptr->z_hdr.z_access_mask = acep->a_access_mask;
673 aceptr->z_hdr.z_flags = acep->a_flags;
674 aceptr->z_hdr.z_type = acep->a_type;
675 entry_type = aceptr->z_hdr.z_flags & ACE_TYPE_FLAGS;
676 if (entry_type != ACE_OWNER && entry_type != OWNING_GROUP &&
677 entry_type != ACE_EVERYONE) {
678 aceptr->z_fuid = zfs_fuid_create(zfsvfs, acep->a_who,
679 cr, (entry_type == 0) ?
680 ZFS_ACE_USER : ZFS_ACE_GROUP, fuidp);
684 * Make sure ACE is valid
686 if (zfs_ace_valid(obj_type, aclp, aceptr->z_hdr.z_type,
687 aceptr->z_hdr.z_flags) != B_TRUE)
690 switch (acep->a_type) {
691 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
692 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
693 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
694 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
695 zobjacep = (zfs_object_ace_t *)aceptr;
696 aceobjp = (ace_object_t *)acep;
698 bcopy(aceobjp->a_obj_type, zobjacep->z_object_type,
699 sizeof (aceobjp->a_obj_type));
700 bcopy(aceobjp->a_inherit_obj_type,
701 zobjacep->z_inherit_type,
702 sizeof (aceobjp->a_inherit_obj_type));
703 acep = (ace_t *)((caddr_t)acep + sizeof (ace_object_t));
706 acep = (ace_t *)((caddr_t)acep + sizeof (ace_t));
709 aceptr = (zfs_ace_t *)((caddr_t)aceptr +
710 aclp->z_ops.ace_size(aceptr));
713 *size = (caddr_t)aceptr - (caddr_t)z_acl;
719 * Copy ZFS ACEs to fixed size ace_t layout
722 zfs_copy_fuid_2_ace(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, cred_t *cr,
723 void *datap, int filter)
726 uint32_t access_mask;
727 uint16_t iflags, type;
728 zfs_ace_hdr_t *zacep = NULL;
730 ace_object_t *objacep;
731 zfs_object_ace_t *zobjacep;
735 while ((zacep = zfs_acl_next_ace(aclp, zacep,
736 &who, &access_mask, &iflags, &type))) {
739 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
740 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
741 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
742 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
746 zobjacep = (zfs_object_ace_t *)zacep;
747 objacep = (ace_object_t *)acep;
748 bcopy(zobjacep->z_object_type,
750 sizeof (zobjacep->z_object_type));
751 bcopy(zobjacep->z_inherit_type,
752 objacep->a_inherit_obj_type,
753 sizeof (zobjacep->z_inherit_type));
754 ace_size = sizeof (ace_object_t);
757 ace_size = sizeof (ace_t);
761 entry_type = (iflags & ACE_TYPE_FLAGS);
762 if ((entry_type != ACE_OWNER &&
763 entry_type != OWNING_GROUP &&
764 entry_type != ACE_EVERYONE)) {
765 acep->a_who = zfs_fuid_map_id(zfsvfs, who,
766 cr, (entry_type & ACE_IDENTIFIER_GROUP) ?
767 ZFS_ACE_GROUP : ZFS_ACE_USER);
769 acep->a_who = (uid_t)(int64_t)who;
771 acep->a_access_mask = access_mask;
772 acep->a_flags = iflags;
774 acep = (ace_t *)((caddr_t)acep + ace_size);
779 zfs_copy_ace_2_oldace(vtype_t obj_type, zfs_acl_t *aclp, ace_t *acep,
780 zfs_oldace_t *z_acl, int aclcnt, size_t *size)
783 zfs_oldace_t *aceptr = z_acl;
785 for (i = 0; i != aclcnt; i++, aceptr++) {
786 aceptr->z_access_mask = acep[i].a_access_mask;
787 aceptr->z_type = acep[i].a_type;
788 aceptr->z_flags = acep[i].a_flags;
789 aceptr->z_fuid = acep[i].a_who;
791 * Make sure ACE is valid
793 if (zfs_ace_valid(obj_type, aclp, aceptr->z_type,
794 aceptr->z_flags) != B_TRUE)
797 *size = (caddr_t)aceptr - (caddr_t)z_acl;
802 * convert old ACL format to new
805 zfs_acl_xform(znode_t *zp, zfs_acl_t *aclp, cred_t *cr)
807 zfs_oldace_t *oldaclp;
809 uint16_t type, iflags;
810 uint32_t access_mask;
813 zfs_acl_node_t *newaclnode;
815 ASSERT(aclp->z_version == ZFS_ACL_VERSION_INITIAL);
817 * First create the ACE in a contiguous piece of memory
818 * for zfs_copy_ace_2_fuid().
820 * We only convert an ACL once, so this won't happen
823 oldaclp = kmem_alloc(sizeof (zfs_oldace_t) * aclp->z_acl_count,
826 while ((cookie = zfs_acl_next_ace(aclp, cookie, &who,
827 &access_mask, &iflags, &type))) {
828 oldaclp[i].z_flags = iflags;
829 oldaclp[i].z_type = type;
830 oldaclp[i].z_fuid = who;
831 oldaclp[i++].z_access_mask = access_mask;
834 newaclnode = zfs_acl_node_alloc(aclp->z_acl_count *
835 sizeof (zfs_object_ace_t));
836 aclp->z_ops = zfs_acl_fuid_ops;
837 VERIFY(zfs_copy_ace_2_fuid(zp->z_zfsvfs, ZTOV(zp)->v_type, aclp,
838 oldaclp, newaclnode->z_acldata, aclp->z_acl_count,
839 &newaclnode->z_size, NULL, cr) == 0);
840 newaclnode->z_ace_count = aclp->z_acl_count;
841 aclp->z_version = ZFS_ACL_VERSION;
842 kmem_free(oldaclp, aclp->z_acl_count * sizeof (zfs_oldace_t));
845 * Release all previous ACL nodes
848 zfs_acl_release_nodes(aclp);
850 list_insert_head(&aclp->z_acl, newaclnode);
852 aclp->z_acl_bytes = newaclnode->z_size;
853 aclp->z_acl_count = newaclnode->z_ace_count;
858 * Convert unix access mask to v4 access mask
861 zfs_unix_to_v4(uint32_t access_mask)
863 uint32_t new_mask = 0;
865 if (access_mask & S_IXOTH)
866 new_mask |= ACE_EXECUTE;
867 if (access_mask & S_IWOTH)
868 new_mask |= ACE_WRITE_DATA;
869 if (access_mask & S_IROTH)
870 new_mask |= ACE_READ_DATA;
875 zfs_set_ace(zfs_acl_t *aclp, void *acep, uint32_t access_mask,
876 uint16_t access_type, uint64_t fuid, uint16_t entry_type)
878 uint16_t type = entry_type & ACE_TYPE_FLAGS;
880 aclp->z_ops.ace_mask_set(acep, access_mask);
881 aclp->z_ops.ace_type_set(acep, access_type);
882 aclp->z_ops.ace_flags_set(acep, entry_type);
883 if ((type != ACE_OWNER && type != OWNING_GROUP &&
884 type != ACE_EVERYONE))
885 aclp->z_ops.ace_who_set(acep, fuid);
889 * Determine mode of file based on ACL.
890 * Also, create FUIDs for any User/Group ACEs
893 zfs_mode_compute(uint64_t fmode, zfs_acl_t *aclp,
894 uint64_t *pflags, uint64_t fuid, uint64_t fgid)
899 zfs_ace_hdr_t *acep = NULL;
901 uint16_t iflags, type;
902 uint32_t access_mask;
903 boolean_t an_exec_denied = B_FALSE;
905 mode = (fmode & (S_IFMT | S_ISUID | S_ISGID | S_ISVTX));
907 while ((acep = zfs_acl_next_ace(aclp, acep, &who,
908 &access_mask, &iflags, &type))) {
910 if (!zfs_acl_valid_ace_type(type, iflags))
913 entry_type = (iflags & ACE_TYPE_FLAGS);
916 * Skip over owner@, group@ or everyone@ inherit only ACEs
918 if ((iflags & ACE_INHERIT_ONLY_ACE) &&
919 (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
920 entry_type == OWNING_GROUP))
923 if (entry_type == ACE_OWNER || (entry_type == 0 &&
925 if ((access_mask & ACE_READ_DATA) &&
926 (!(seen & S_IRUSR))) {
932 if ((access_mask & ACE_WRITE_DATA) &&
933 (!(seen & S_IWUSR))) {
939 if ((access_mask & ACE_EXECUTE) &&
940 (!(seen & S_IXUSR))) {
946 } else if (entry_type == OWNING_GROUP ||
947 (entry_type == ACE_IDENTIFIER_GROUP && who == fgid)) {
948 if ((access_mask & ACE_READ_DATA) &&
949 (!(seen & S_IRGRP))) {
955 if ((access_mask & ACE_WRITE_DATA) &&
956 (!(seen & S_IWGRP))) {
962 if ((access_mask & ACE_EXECUTE) &&
963 (!(seen & S_IXGRP))) {
969 } else if (entry_type == ACE_EVERYONE) {
970 if ((access_mask & ACE_READ_DATA)) {
971 if (!(seen & S_IRUSR)) {
977 if (!(seen & S_IRGRP)) {
983 if (!(seen & S_IROTH)) {
990 if ((access_mask & ACE_WRITE_DATA)) {
991 if (!(seen & S_IWUSR)) {
997 if (!(seen & S_IWGRP)) {
1003 if (!(seen & S_IWOTH)) {
1005 if (type == ALLOW) {
1010 if ((access_mask & ACE_EXECUTE)) {
1011 if (!(seen & S_IXUSR)) {
1013 if (type == ALLOW) {
1017 if (!(seen & S_IXGRP)) {
1019 if (type == ALLOW) {
1023 if (!(seen & S_IXOTH)) {
1025 if (type == ALLOW) {
1032 * Only care if this IDENTIFIER_GROUP or
1033 * USER ACE denies execute access to someone,
1034 * mode is not affected
1036 if ((access_mask & ACE_EXECUTE) && type == DENY)
1037 an_exec_denied = B_TRUE;
1042 * Failure to allow is effectively a deny, so execute permission
1043 * is denied if it was never mentioned or if we explicitly
1044 * weren't allowed it.
1046 if (!an_exec_denied &&
1047 ((seen & ALL_MODE_EXECS) != ALL_MODE_EXECS ||
1048 (mode & ALL_MODE_EXECS) != ALL_MODE_EXECS))
1049 an_exec_denied = B_TRUE;
1052 *pflags &= ~ZFS_NO_EXECS_DENIED;
1054 *pflags |= ZFS_NO_EXECS_DENIED;
1060 * Read an external acl object. If the intent is to modify, always
1061 * create a new acl and leave any cached acl in place.
1064 zfs_acl_node_read(znode_t *zp, boolean_t have_lock, zfs_acl_t **aclpp,
1065 boolean_t will_modify)
1070 zfs_acl_node_t *aclnode;
1071 zfs_acl_phys_t znode_acl;
1074 boolean_t drop_lock = B_FALSE;
1076 ASSERT(MUTEX_HELD(&zp->z_acl_lock));
1078 if (zp->z_acl_cached && !will_modify) {
1079 *aclpp = zp->z_acl_cached;
1084 * close race where znode could be upgrade while trying to
1085 * read the znode attributes.
1087 * But this could only happen if the file isn't already an SA
1090 if (!zp->z_is_sa && !have_lock) {
1091 mutex_enter(&zp->z_lock);
1094 version = zfs_znode_acl_version(zp);
1096 if ((error = zfs_acl_znode_info(zp, &aclsize,
1097 &acl_count, &znode_acl)) != 0) {
1101 aclp = zfs_acl_alloc(version);
1103 aclp->z_acl_count = acl_count;
1104 aclp->z_acl_bytes = aclsize;
1106 aclnode = zfs_acl_node_alloc(aclsize);
1107 aclnode->z_ace_count = aclp->z_acl_count;
1108 aclnode->z_size = aclsize;
1111 if (znode_acl.z_acl_extern_obj) {
1112 error = dmu_read(zp->z_zfsvfs->z_os,
1113 znode_acl.z_acl_extern_obj, 0, aclnode->z_size,
1114 aclnode->z_acldata, DMU_READ_PREFETCH);
1116 bcopy(znode_acl.z_ace_data, aclnode->z_acldata,
1120 error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DACL_ACES(zp->z_zfsvfs),
1121 aclnode->z_acldata, aclnode->z_size);
1126 zfs_acl_node_free(aclnode);
1127 /* convert checksum errors into IO errors */
1128 if (error == ECKSUM)
1133 list_insert_head(&aclp->z_acl, aclnode);
1137 zp->z_acl_cached = aclp;
1140 mutex_exit(&zp->z_lock);
1146 zfs_acl_data_locator(void **dataptr, uint32_t *length, uint32_t buflen,
1147 boolean_t start, void *userdata)
1149 zfs_acl_locator_cb_t *cb = (zfs_acl_locator_cb_t *)userdata;
1152 cb->cb_acl_node = list_head(&cb->cb_aclp->z_acl);
1154 cb->cb_acl_node = list_next(&cb->cb_aclp->z_acl,
1157 *dataptr = cb->cb_acl_node->z_acldata;
1158 *length = cb->cb_acl_node->z_size;
1162 zfs_acl_chown_setattr(znode_t *zp)
1167 ASSERT(MUTEX_HELD(&zp->z_lock));
1168 ASSERT(MUTEX_HELD(&zp->z_acl_lock));
1170 if ((error = zfs_acl_node_read(zp, B_TRUE, &aclp, B_FALSE)) == 0)
1171 zp->z_mode = zfs_mode_compute(zp->z_mode, aclp,
1172 &zp->z_pflags, zp->z_uid, zp->z_gid);
1177 * common code for setting ACLs.
1179 * This function is called from zfs_mode_update, zfs_perm_init, and zfs_setacl.
1180 * zfs_setacl passes a non-NULL inherit pointer (ihp) to indicate that it's
1181 * already checked the acl and knows whether to inherit.
1184 zfs_aclset_common(znode_t *zp, zfs_acl_t *aclp, cred_t *cr, dmu_tx_t *tx)
1187 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1188 dmu_object_type_t otype;
1189 zfs_acl_locator_cb_t locate = { 0 };
1191 sa_bulk_attr_t bulk[5];
1197 mode = zfs_mode_compute(mode, aclp, &zp->z_pflags,
1198 zp->z_uid, zp->z_gid);
1201 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
1202 &mode, sizeof (mode));
1203 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
1204 &zp->z_pflags, sizeof (zp->z_pflags));
1205 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
1206 &ctime, sizeof (ctime));
1208 if (zp->z_acl_cached) {
1209 zfs_acl_free(zp->z_acl_cached);
1210 zp->z_acl_cached = NULL;
1216 if (!zfsvfs->z_use_fuids) {
1217 otype = DMU_OT_OLDACL;
1219 if ((aclp->z_version == ZFS_ACL_VERSION_INITIAL) &&
1220 (zfsvfs->z_version >= ZPL_VERSION_FUID))
1221 zfs_acl_xform(zp, aclp, cr);
1222 ASSERT(aclp->z_version >= ZFS_ACL_VERSION_FUID);
1227 * Arrgh, we have to handle old on disk format
1228 * as well as newer (preferred) SA format.
1231 if (zp->z_is_sa) { /* the easy case, just update the ACL attribute */
1232 locate.cb_aclp = aclp;
1233 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_ACES(zfsvfs),
1234 zfs_acl_data_locator, &locate, aclp->z_acl_bytes);
1235 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_COUNT(zfsvfs),
1236 NULL, &aclp->z_acl_count, sizeof (uint64_t));
1237 } else { /* Painful legacy way */
1238 zfs_acl_node_t *aclnode;
1240 zfs_acl_phys_t acl_phys;
1243 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zfsvfs),
1244 &acl_phys, sizeof (acl_phys))) != 0)
1247 aoid = acl_phys.z_acl_extern_obj;
1249 if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
1251 * If ACL was previously external and we are now
1252 * converting to new ACL format then release old
1253 * ACL object and create a new one.
1256 aclp->z_version != acl_phys.z_acl_version) {
1257 error = dmu_object_free(zfsvfs->z_os, aoid, tx);
1263 aoid = dmu_object_alloc(zfsvfs->z_os,
1264 otype, aclp->z_acl_bytes,
1265 otype == DMU_OT_ACL ?
1266 DMU_OT_SYSACL : DMU_OT_NONE,
1267 otype == DMU_OT_ACL ?
1268 DN_MAX_BONUSLEN : 0, tx);
1270 (void) dmu_object_set_blocksize(zfsvfs->z_os,
1271 aoid, aclp->z_acl_bytes, 0, tx);
1273 acl_phys.z_acl_extern_obj = aoid;
1274 for (aclnode = list_head(&aclp->z_acl); aclnode;
1275 aclnode = list_next(&aclp->z_acl, aclnode)) {
1276 if (aclnode->z_ace_count == 0)
1278 dmu_write(zfsvfs->z_os, aoid, off,
1279 aclnode->z_size, aclnode->z_acldata, tx);
1280 off += aclnode->z_size;
1283 void *start = acl_phys.z_ace_data;
1285 * Migrating back embedded?
1287 if (acl_phys.z_acl_extern_obj) {
1288 error = dmu_object_free(zfsvfs->z_os,
1289 acl_phys.z_acl_extern_obj, tx);
1292 acl_phys.z_acl_extern_obj = 0;
1295 for (aclnode = list_head(&aclp->z_acl); aclnode;
1296 aclnode = list_next(&aclp->z_acl, aclnode)) {
1297 if (aclnode->z_ace_count == 0)
1299 bcopy(aclnode->z_acldata, start,
1301 start = (caddr_t)start + aclnode->z_size;
1305 * If Old version then swap count/bytes to match old
1306 * layout of znode_acl_phys_t.
1308 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
1309 acl_phys.z_acl_size = aclp->z_acl_count;
1310 acl_phys.z_acl_count = aclp->z_acl_bytes;
1312 acl_phys.z_acl_size = aclp->z_acl_bytes;
1313 acl_phys.z_acl_count = aclp->z_acl_count;
1315 acl_phys.z_acl_version = aclp->z_version;
1317 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL,
1318 &acl_phys, sizeof (acl_phys));
1322 * Replace ACL wide bits, but first clear them.
1324 zp->z_pflags &= ~ZFS_ACL_WIDE_FLAGS;
1326 zp->z_pflags |= aclp->z_hints;
1328 if (ace_trivial_common(aclp, 0, zfs_ace_walk) == 0)
1329 zp->z_pflags |= ZFS_ACL_TRIVIAL;
1331 zfs_tstamp_update_setup(zp, STATE_CHANGED, NULL, ctime, B_TRUE);
1332 return (sa_bulk_update(zp->z_sa_hdl, bulk, count, tx));
1336 * Update access mask for prepended ACE
1338 * This applies the "groupmask" value for aclmode property.
1341 zfs_acl_prepend_fixup(zfs_acl_t *aclp, void *acep, void *origacep,
1342 mode_t mode, uint64_t owner)
1344 int rmask, wmask, xmask;
1347 uint32_t origmask, acepmask;
1350 aceflags = aclp->z_ops.ace_flags_get(acep);
1351 fuid = aclp->z_ops.ace_who_get(acep);
1352 origmask = aclp->z_ops.ace_mask_get(origacep);
1353 acepmask = aclp->z_ops.ace_mask_get(acep);
1355 user_ace = (!(aceflags &
1356 (ACE_OWNER|ACE_GROUP|ACE_IDENTIFIER_GROUP)));
1358 if (user_ace && (fuid == owner)) {
1368 if (origmask & ACE_READ_DATA) {
1370 acepmask &= ~ACE_READ_DATA;
1372 acepmask |= ACE_READ_DATA;
1376 if (origmask & ACE_WRITE_DATA) {
1378 acepmask &= ~ACE_WRITE_DATA;
1380 acepmask |= ACE_WRITE_DATA;
1384 if (origmask & ACE_APPEND_DATA) {
1386 acepmask &= ~ACE_APPEND_DATA;
1388 acepmask |= ACE_APPEND_DATA;
1392 if (origmask & ACE_EXECUTE) {
1394 acepmask &= ~ACE_EXECUTE;
1396 acepmask |= ACE_EXECUTE;
1399 aclp->z_ops.ace_mask_set(acep, acepmask);
1403 zfs_acl_chmod(zfsvfs_t *zfsvfs, uint64_t mode, zfs_acl_t *aclp)
1407 int new_count, new_bytes;
1410 uint16_t iflags, type;
1411 uint32_t access_mask;
1412 zfs_acl_node_t *newnode;
1413 size_t abstract_size = aclp->z_ops.ace_abstract_size();
1415 uint32_t owner, group, everyone;
1416 uint32_t deny1, deny2, allow0;
1418 new_count = new_bytes = 0;
1420 acl_trivial_access_masks((mode_t)mode, &allow0, &deny1, &deny2,
1421 &owner, &group, &everyone);
1423 newnode = zfs_acl_node_alloc((abstract_size * 6) + aclp->z_acl_bytes);
1425 zacep = newnode->z_acldata;
1427 zfs_set_ace(aclp, zacep, allow0, ALLOW, -1, ACE_OWNER);
1428 zacep = (void *)((uintptr_t)zacep + abstract_size);
1430 new_bytes += abstract_size;
1432 zfs_set_ace(aclp, zacep, deny1, DENY, -1, ACE_OWNER);
1433 zacep = (void *)((uintptr_t)zacep + abstract_size);
1435 new_bytes += abstract_size;
1438 zfs_set_ace(aclp, zacep, deny2, DENY, -1, OWNING_GROUP);
1439 zacep = (void *)((uintptr_t)zacep + abstract_size);
1441 new_bytes += abstract_size;
1444 while ((acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
1446 uint16_t inherit_flags;
1448 entry_type = (iflags & ACE_TYPE_FLAGS);
1449 inherit_flags = (iflags & ALL_INHERIT);
1451 if ((entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
1452 (entry_type == OWNING_GROUP)) &&
1453 ((inherit_flags & ACE_INHERIT_ONLY_ACE) == 0)) {
1457 if ((type != ALLOW && type != DENY) ||
1458 (inherit_flags & ACE_INHERIT_ONLY_ACE)) {
1460 aclp->z_hints |= ZFS_INHERIT_ACE;
1462 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1463 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1464 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1465 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
1466 aclp->z_hints |= ZFS_ACL_OBJ_ACE;
1472 * Limit permissions to be no greater than
1475 if (zfsvfs->z_acl_inherit == ZFS_ACL_RESTRICTED) {
1476 if (!(mode & S_IRGRP))
1477 access_mask &= ~ACE_READ_DATA;
1478 if (!(mode & S_IWGRP))
1480 ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
1481 if (!(mode & S_IXGRP))
1482 access_mask &= ~ACE_EXECUTE;
1484 ~(ACE_WRITE_OWNER|ACE_WRITE_ACL|
1485 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS);
1488 zfs_set_ace(aclp, zacep, access_mask, type, who, iflags);
1489 ace_size = aclp->z_ops.ace_size(acep);
1490 zacep = (void *)((uintptr_t)zacep + ace_size);
1492 new_bytes += ace_size;
1494 zfs_set_ace(aclp, zacep, owner, 0, -1, ACE_OWNER);
1495 zacep = (void *)((uintptr_t)zacep + abstract_size);
1496 zfs_set_ace(aclp, zacep, group, 0, -1, OWNING_GROUP);
1497 zacep = (void *)((uintptr_t)zacep + abstract_size);
1498 zfs_set_ace(aclp, zacep, everyone, 0, -1, ACE_EVERYONE);
1501 new_bytes += abstract_size * 3;
1502 zfs_acl_release_nodes(aclp);
1503 aclp->z_acl_count = new_count;
1504 aclp->z_acl_bytes = new_bytes;
1505 newnode->z_ace_count = new_count;
1506 newnode->z_size = new_bytes;
1507 list_insert_tail(&aclp->z_acl, newnode);
1511 zfs_acl_chmod_setattr(znode_t *zp, zfs_acl_t **aclp, uint64_t mode)
1513 mutex_enter(&zp->z_acl_lock);
1514 mutex_enter(&zp->z_lock);
1515 *aclp = zfs_acl_alloc(zfs_acl_version_zp(zp));
1516 (*aclp)->z_hints = zp->z_pflags & V4_ACL_WIDE_FLAGS;
1517 zfs_acl_chmod(zp->z_zfsvfs, mode, *aclp);
1518 mutex_exit(&zp->z_lock);
1519 mutex_exit(&zp->z_acl_lock);
1524 * strip off write_owner and write_acl
1527 zfs_restricted_update(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, void *acep)
1529 uint32_t mask = aclp->z_ops.ace_mask_get(acep);
1531 if ((zfsvfs->z_acl_inherit == ZFS_ACL_RESTRICTED) &&
1532 (aclp->z_ops.ace_type_get(acep) == ALLOW)) {
1533 mask &= ~RESTRICTED_CLEAR;
1534 aclp->z_ops.ace_mask_set(acep, mask);
1539 * Should ACE be inherited?
1542 zfs_ace_can_use(vtype_t vtype, uint16_t acep_flags)
1544 int iflags = (acep_flags & 0xf);
1546 if ((vtype == VDIR) && (iflags & ACE_DIRECTORY_INHERIT_ACE))
1548 else if (iflags & ACE_FILE_INHERIT_ACE)
1549 return (!((vtype == VDIR) &&
1550 (iflags & ACE_NO_PROPAGATE_INHERIT_ACE)));
1555 * inherit inheritable ACEs from parent
1558 zfs_acl_inherit(zfsvfs_t *zfsvfs, vtype_t vtype, zfs_acl_t *paclp,
1559 uint64_t mode, boolean_t *need_chmod)
1563 zfs_acl_node_t *aclnode;
1564 zfs_acl_t *aclp = NULL;
1566 uint32_t access_mask;
1567 uint16_t iflags, newflags, type;
1569 void *data1, *data2;
1570 size_t data1sz, data2sz;
1571 boolean_t vdir = vtype == VDIR;
1572 boolean_t vreg = vtype == VREG;
1573 boolean_t passthrough, passthrough_x, noallow;
1576 zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH_X;
1577 passthrough = passthrough_x ||
1578 zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH;
1580 zfsvfs->z_acl_inherit == ZFS_ACL_NOALLOW;
1582 *need_chmod = B_TRUE;
1584 aclp = zfs_acl_alloc(paclp->z_version);
1585 if (zfsvfs->z_acl_inherit == ZFS_ACL_DISCARD || vtype == VLNK)
1587 while ((pacep = zfs_acl_next_ace(paclp, pacep, &who,
1588 &access_mask, &iflags, &type))) {
1591 * don't inherit bogus ACEs
1593 if (!zfs_acl_valid_ace_type(type, iflags))
1596 if (noallow && type == ALLOW)
1599 ace_size = aclp->z_ops.ace_size(pacep);
1601 if (!zfs_ace_can_use(vtype, iflags))
1605 * If owner@, group@, or everyone@ inheritable
1606 * then zfs_acl_chmod() isn't needed.
1609 ((iflags & (ACE_OWNER|ACE_EVERYONE)) ||
1610 ((iflags & OWNING_GROUP) ==
1611 OWNING_GROUP)) && (vreg || (vdir && (iflags &
1612 ACE_DIRECTORY_INHERIT_ACE)))) {
1613 *need_chmod = B_FALSE;
1616 if (!vdir && passthrough_x &&
1617 ((mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0)) {
1618 access_mask &= ~ACE_EXECUTE;
1621 aclnode = zfs_acl_node_alloc(ace_size);
1622 list_insert_tail(&aclp->z_acl, aclnode);
1623 acep = aclnode->z_acldata;
1625 zfs_set_ace(aclp, acep, access_mask, type,
1626 who, iflags|ACE_INHERITED_ACE);
1629 * Copy special opaque data if any
1631 if ((data1sz = paclp->z_ops.ace_data(pacep, &data1)) != 0) {
1632 VERIFY((data2sz = aclp->z_ops.ace_data(acep,
1633 &data2)) == data1sz);
1634 bcopy(data1, data2, data2sz);
1637 aclp->z_acl_count++;
1638 aclnode->z_ace_count++;
1639 aclp->z_acl_bytes += aclnode->z_size;
1640 newflags = aclp->z_ops.ace_flags_get(acep);
1643 aclp->z_hints |= ZFS_INHERIT_ACE;
1645 if ((iflags & ACE_NO_PROPAGATE_INHERIT_ACE) || !vdir) {
1646 newflags &= ~ALL_INHERIT;
1647 aclp->z_ops.ace_flags_set(acep,
1648 newflags|ACE_INHERITED_ACE);
1649 zfs_restricted_update(zfsvfs, aclp, acep);
1656 * If only FILE_INHERIT is set then turn on
1659 if ((iflags & (ACE_FILE_INHERIT_ACE |
1660 ACE_DIRECTORY_INHERIT_ACE)) == ACE_FILE_INHERIT_ACE) {
1661 newflags |= ACE_INHERIT_ONLY_ACE;
1662 aclp->z_ops.ace_flags_set(acep,
1663 newflags|ACE_INHERITED_ACE);
1665 newflags &= ~ACE_INHERIT_ONLY_ACE;
1666 aclp->z_ops.ace_flags_set(acep,
1667 newflags|ACE_INHERITED_ACE);
1674 * Create file system object initial permissions
1675 * including inheritable ACEs.
1678 zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
1679 vsecattr_t *vsecp, zfs_acl_ids_t *acl_ids)
1682 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
1685 boolean_t need_chmod = B_TRUE;
1686 boolean_t inherited = B_FALSE;
1688 bzero(acl_ids, sizeof (zfs_acl_ids_t));
1689 acl_ids->z_mode = MAKEIMODE(vap->va_type, vap->va_mode);
1692 if ((error = zfs_vsec_2_aclp(zfsvfs, vap->va_type, vsecp, cr,
1693 &acl_ids->z_fuidp, &acl_ids->z_aclp)) != 0)
1696 * Determine uid and gid.
1698 if ((flag & IS_ROOT_NODE) || zfsvfs->z_replay ||
1699 ((flag & IS_XATTR) && (vap->va_type == VDIR))) {
1700 acl_ids->z_fuid = zfs_fuid_create(zfsvfs,
1701 (uint64_t)vap->va_uid, cr,
1702 ZFS_OWNER, &acl_ids->z_fuidp);
1703 acl_ids->z_fgid = zfs_fuid_create(zfsvfs,
1704 (uint64_t)vap->va_gid, cr,
1705 ZFS_GROUP, &acl_ids->z_fuidp);
1708 acl_ids->z_fuid = zfs_fuid_create_cred(zfsvfs, ZFS_OWNER,
1709 cr, &acl_ids->z_fuidp);
1710 acl_ids->z_fgid = 0;
1711 if (vap->va_mask & AT_GID) {
1712 acl_ids->z_fgid = zfs_fuid_create(zfsvfs,
1713 (uint64_t)vap->va_gid,
1714 cr, ZFS_GROUP, &acl_ids->z_fuidp);
1716 if (acl_ids->z_fgid != dzp->z_gid &&
1717 !groupmember(vap->va_gid, cr) &&
1718 secpolicy_vnode_create_gid(cr) != 0)
1719 acl_ids->z_fgid = 0;
1721 if (acl_ids->z_fgid == 0) {
1722 if (dzp->z_mode & S_ISGID) {
1726 acl_ids->z_fgid = dzp->z_gid;
1727 gid = zfs_fuid_map_id(zfsvfs, acl_ids->z_fgid,
1730 if (zfsvfs->z_use_fuids &&
1731 IS_EPHEMERAL(acl_ids->z_fgid)) {
1732 domain = zfs_fuid_idx_domain(
1733 &zfsvfs->z_fuid_idx,
1734 FUID_INDEX(acl_ids->z_fgid));
1735 rid = FUID_RID(acl_ids->z_fgid);
1736 zfs_fuid_node_add(&acl_ids->z_fuidp,
1738 FUID_INDEX(acl_ids->z_fgid),
1739 acl_ids->z_fgid, ZFS_GROUP);
1742 acl_ids->z_fgid = zfs_fuid_create_cred(zfsvfs,
1743 ZFS_GROUP, cr, &acl_ids->z_fuidp);
1750 * If we're creating a directory, and the parent directory has the
1751 * set-GID bit set, set in on the new directory.
1752 * Otherwise, if the user is neither privileged nor a member of the
1753 * file's new group, clear the file's set-GID bit.
1756 if (!(flag & IS_ROOT_NODE) && (dzp->z_mode & S_ISGID) &&
1757 (vap->va_type == VDIR)) {
1758 acl_ids->z_mode |= S_ISGID;
1760 if ((acl_ids->z_mode & S_ISGID) &&
1761 secpolicy_vnode_setids_setgids(cr, gid) != 0)
1762 acl_ids->z_mode &= ~S_ISGID;
1765 if (acl_ids->z_aclp == NULL) {
1766 mutex_enter(&dzp->z_acl_lock);
1767 mutex_enter(&dzp->z_lock);
1768 if (!(flag & IS_ROOT_NODE) && (ZTOV(dzp)->v_type == VDIR &&
1769 (dzp->z_pflags & ZFS_INHERIT_ACE)) &&
1770 !(dzp->z_pflags & ZFS_XATTR)) {
1771 VERIFY(0 == zfs_acl_node_read(dzp, B_TRUE,
1773 acl_ids->z_aclp = zfs_acl_inherit(zfsvfs,
1774 vap->va_type, paclp, acl_ids->z_mode, &need_chmod);
1778 zfs_acl_alloc(zfs_acl_version_zp(dzp));
1779 acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL;
1781 mutex_exit(&dzp->z_lock);
1782 mutex_exit(&dzp->z_acl_lock);
1784 acl_ids->z_aclp->z_hints |= (vap->va_type == VDIR) ?
1785 ZFS_ACL_AUTO_INHERIT : 0;
1786 zfs_acl_chmod(zfsvfs, acl_ids->z_mode, acl_ids->z_aclp);
1790 if (inherited || vsecp) {
1791 acl_ids->z_mode = zfs_mode_compute(acl_ids->z_mode,
1792 acl_ids->z_aclp, &acl_ids->z_aclp->z_hints,
1793 acl_ids->z_fuid, acl_ids->z_fgid);
1794 if (ace_trivial_common(acl_ids->z_aclp, 0, zfs_ace_walk) == 0)
1795 acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL;
1802 * Free ACL and fuid_infop, but not the acl_ids structure
1805 zfs_acl_ids_free(zfs_acl_ids_t *acl_ids)
1807 if (acl_ids->z_aclp)
1808 zfs_acl_free(acl_ids->z_aclp);
1809 if (acl_ids->z_fuidp)
1810 zfs_fuid_info_free(acl_ids->z_fuidp);
1811 acl_ids->z_aclp = NULL;
1812 acl_ids->z_fuidp = NULL;
1816 zfs_acl_ids_overquota(zfsvfs_t *zfsvfs, zfs_acl_ids_t *acl_ids)
1818 return (zfs_fuid_overquota(zfsvfs, B_FALSE, acl_ids->z_fuid) ||
1819 zfs_fuid_overquota(zfsvfs, B_TRUE, acl_ids->z_fgid));
1823 * Retrieve a files ACL
1826 zfs_getacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
1834 mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT |
1835 VSA_ACE_ACLFLAGS | VSA_ACE_ALLTYPES);
1840 if ((error = zfs_zaccess(zp, ACE_READ_ACL, 0, skipaclchk, cr)))
1843 mutex_enter(&zp->z_acl_lock);
1845 error = zfs_acl_node_read(zp, B_FALSE, &aclp, B_FALSE);
1847 mutex_exit(&zp->z_acl_lock);
1852 * Scan ACL to determine number of ACEs
1854 if ((zp->z_pflags & ZFS_ACL_OBJ_ACE) && !(mask & VSA_ACE_ALLTYPES)) {
1857 uint32_t access_mask;
1858 uint16_t type, iflags;
1860 while ((zacep = zfs_acl_next_ace(aclp, zacep,
1861 &who, &access_mask, &iflags, &type))) {
1863 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1864 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1865 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1866 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
1873 vsecp->vsa_aclcnt = count;
1875 count = (int)aclp->z_acl_count;
1877 if (mask & VSA_ACECNT) {
1878 vsecp->vsa_aclcnt = count;
1881 if (mask & VSA_ACE) {
1884 aclsz = count * sizeof (ace_t) +
1885 sizeof (ace_object_t) * largeace;
1887 vsecp->vsa_aclentp = kmem_alloc(aclsz, KM_SLEEP);
1888 vsecp->vsa_aclentsz = aclsz;
1890 if (aclp->z_version == ZFS_ACL_VERSION_FUID)
1891 zfs_copy_fuid_2_ace(zp->z_zfsvfs, aclp, cr,
1892 vsecp->vsa_aclentp, !(mask & VSA_ACE_ALLTYPES));
1894 zfs_acl_node_t *aclnode;
1895 void *start = vsecp->vsa_aclentp;
1897 for (aclnode = list_head(&aclp->z_acl); aclnode;
1898 aclnode = list_next(&aclp->z_acl, aclnode)) {
1899 bcopy(aclnode->z_acldata, start,
1901 start = (caddr_t)start + aclnode->z_size;
1903 ASSERT((caddr_t)start - (caddr_t)vsecp->vsa_aclentp ==
1907 if (mask & VSA_ACE_ACLFLAGS) {
1908 vsecp->vsa_aclflags = 0;
1909 if (zp->z_pflags & ZFS_ACL_DEFAULTED)
1910 vsecp->vsa_aclflags |= ACL_DEFAULTED;
1911 if (zp->z_pflags & ZFS_ACL_PROTECTED)
1912 vsecp->vsa_aclflags |= ACL_PROTECTED;
1913 if (zp->z_pflags & ZFS_ACL_AUTO_INHERIT)
1914 vsecp->vsa_aclflags |= ACL_AUTO_INHERIT;
1917 mutex_exit(&zp->z_acl_lock);
1923 zfs_vsec_2_aclp(zfsvfs_t *zfsvfs, vtype_t obj_type,
1924 vsecattr_t *vsecp, cred_t *cr, zfs_fuid_info_t **fuidp, zfs_acl_t **zaclp)
1927 zfs_acl_node_t *aclnode;
1928 int aclcnt = vsecp->vsa_aclcnt;
1931 if (vsecp->vsa_aclcnt > MAX_ACL_ENTRIES || vsecp->vsa_aclcnt <= 0)
1934 aclp = zfs_acl_alloc(zfs_acl_version(zfsvfs->z_version));
1937 aclnode = zfs_acl_node_alloc(aclcnt * sizeof (zfs_object_ace_t));
1938 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
1939 if ((error = zfs_copy_ace_2_oldace(obj_type, aclp,
1940 (ace_t *)vsecp->vsa_aclentp, aclnode->z_acldata,
1941 aclcnt, &aclnode->z_size)) != 0) {
1943 zfs_acl_node_free(aclnode);
1947 if ((error = zfs_copy_ace_2_fuid(zfsvfs, obj_type, aclp,
1948 vsecp->vsa_aclentp, aclnode->z_acldata, aclcnt,
1949 &aclnode->z_size, fuidp, cr)) != 0) {
1951 zfs_acl_node_free(aclnode);
1955 aclp->z_acl_bytes = aclnode->z_size;
1956 aclnode->z_ace_count = aclcnt;
1957 aclp->z_acl_count = aclcnt;
1958 list_insert_head(&aclp->z_acl, aclnode);
1961 * If flags are being set then add them to z_hints
1963 if (vsecp->vsa_mask & VSA_ACE_ACLFLAGS) {
1964 if (vsecp->vsa_aclflags & ACL_PROTECTED)
1965 aclp->z_hints |= ZFS_ACL_PROTECTED;
1966 if (vsecp->vsa_aclflags & ACL_DEFAULTED)
1967 aclp->z_hints |= ZFS_ACL_DEFAULTED;
1968 if (vsecp->vsa_aclflags & ACL_AUTO_INHERIT)
1969 aclp->z_hints |= ZFS_ACL_AUTO_INHERIT;
1981 zfs_setacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
1983 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1984 zilog_t *zilog = zfsvfs->z_log;
1985 ulong_t mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT);
1989 zfs_fuid_info_t *fuidp = NULL;
1990 boolean_t fuid_dirtied;
1996 if (zp->z_pflags & ZFS_IMMUTABLE)
1999 if ((error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr)))
2002 error = zfs_vsec_2_aclp(zfsvfs, ZTOV(zp)->v_type, vsecp, cr, &fuidp,
2008 * If ACL wide flags aren't being set then preserve any
2011 if (!(vsecp->vsa_mask & VSA_ACE_ACLFLAGS)) {
2013 (zp->z_pflags & V4_ACL_WIDE_FLAGS);
2016 mutex_enter(&zp->z_acl_lock);
2017 mutex_enter(&zp->z_lock);
2019 tx = dmu_tx_create(zfsvfs->z_os);
2021 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
2023 fuid_dirtied = zfsvfs->z_fuid_dirty;
2025 zfs_fuid_txhold(zfsvfs, tx);
2028 * If old version and ACL won't fit in bonus and we aren't
2029 * upgrading then take out necessary DMU holds
2032 if ((acl_obj = zfs_external_acl(zp)) != 0) {
2033 if (zfsvfs->z_version >= ZPL_VERSION_FUID &&
2034 zfs_znode_acl_version(zp) <= ZFS_ACL_VERSION_INITIAL) {
2035 dmu_tx_hold_free(tx, acl_obj, 0,
2037 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
2040 dmu_tx_hold_write(tx, acl_obj, 0, aclp->z_acl_bytes);
2042 } else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) {
2043 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, aclp->z_acl_bytes);
2046 zfs_sa_upgrade_txholds(tx, zp);
2047 error = dmu_tx_assign(tx, TXG_NOWAIT);
2049 mutex_exit(&zp->z_acl_lock);
2050 mutex_exit(&zp->z_lock);
2052 if (error == ERESTART) {
2062 error = zfs_aclset_common(zp, aclp, cr, tx);
2064 ASSERT(zp->z_acl_cached == NULL);
2065 zp->z_acl_cached = aclp;
2068 zfs_fuid_sync(zfsvfs, tx);
2070 zfs_log_acl(zilog, tx, zp, vsecp, fuidp);
2073 zfs_fuid_info_free(fuidp);
2076 mutex_exit(&zp->z_lock);
2077 mutex_exit(&zp->z_acl_lock);
2083 * Check accesses of interest (AoI) against attributes of the dataset
2084 * such as read-only. Returns zero if no AoI conflict with dataset
2085 * attributes, otherwise an appropriate errno is returned.
2088 zfs_zaccess_dataset_check(znode_t *zp, uint32_t v4_mode)
2090 if ((v4_mode & WRITE_MASK) &&
2091 (zp->z_zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) &&
2092 (!IS_DEVVP(ZTOV(zp)) ||
2093 (IS_DEVVP(ZTOV(zp)) && (v4_mode & WRITE_MASK_ATTRS)))) {
2098 * Only check for READONLY on non-directories.
2100 if ((v4_mode & WRITE_MASK_DATA) &&
2101 (((ZTOV(zp)->v_type != VDIR) &&
2102 (zp->z_pflags & (ZFS_READONLY | ZFS_IMMUTABLE))) ||
2103 (ZTOV(zp)->v_type == VDIR &&
2104 (zp->z_pflags & ZFS_IMMUTABLE)))) {
2108 if ((v4_mode & (ACE_DELETE | ACE_DELETE_CHILD)) &&
2109 (zp->z_pflags & ZFS_NOUNLINK)) {
2113 if (((v4_mode & (ACE_READ_DATA|ACE_EXECUTE)) &&
2114 (zp->z_pflags & ZFS_AV_QUARANTINED))) {
2122 * The primary usage of this function is to loop through all of the
2123 * ACEs in the znode, determining what accesses of interest (AoI) to
2124 * the caller are allowed or denied. The AoI are expressed as bits in
2125 * the working_mode parameter. As each ACE is processed, bits covered
2126 * by that ACE are removed from the working_mode. This removal
2127 * facilitates two things. The first is that when the working mode is
2128 * empty (= 0), we know we've looked at all the AoI. The second is
2129 * that the ACE interpretation rules don't allow a later ACE to undo
2130 * something granted or denied by an earlier ACE. Removing the
2131 * discovered access or denial enforces this rule. At the end of
2132 * processing the ACEs, all AoI that were found to be denied are
2133 * placed into the working_mode, giving the caller a mask of denied
2134 * accesses. Returns:
2135 * 0 if all AoI granted
2136 * EACCESS if the denied mask is non-zero
2137 * other error if abnormal failure (e.g., IO error)
2139 * A secondary usage of the function is to determine if any of the
2140 * AoI are granted. If an ACE grants any access in
2141 * the working_mode, we immediately short circuit out of the function.
2142 * This mode is chosen by setting anyaccess to B_TRUE. The
2143 * working_mode is not a denied access mask upon exit if the function
2144 * is used in this manner.
2147 zfs_zaccess_aces_check(znode_t *zp, uint32_t *working_mode,
2148 boolean_t anyaccess, cred_t *cr)
2150 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2153 uid_t uid = crgetuid(cr);
2155 uint16_t type, iflags;
2156 uint16_t entry_type;
2157 uint32_t access_mask;
2158 uint32_t deny_mask = 0;
2159 zfs_ace_hdr_t *acep = NULL;
2164 zfs_fuid_map_ids(zp, cr, &fowner, &gowner);
2166 mutex_enter(&zp->z_acl_lock);
2168 error = zfs_acl_node_read(zp, B_FALSE, &aclp, B_FALSE);
2170 mutex_exit(&zp->z_acl_lock);
2174 ASSERT(zp->z_acl_cached);
2176 while ((acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
2178 uint32_t mask_matched;
2180 if (!zfs_acl_valid_ace_type(type, iflags))
2183 if (ZTOV(zp)->v_type == VDIR && (iflags & ACE_INHERIT_ONLY_ACE))
2186 /* Skip ACE if it does not affect any AoI */
2187 mask_matched = (access_mask & *working_mode);
2191 entry_type = (iflags & ACE_TYPE_FLAGS);
2195 switch (entry_type) {
2203 case ACE_IDENTIFIER_GROUP:
2204 checkit = zfs_groupmember(zfsvfs, who, cr);
2212 if (entry_type == 0) {
2215 newid = zfs_fuid_map_id(zfsvfs, who, cr,
2217 if (newid != IDMAP_WK_CREATOR_OWNER_UID &&
2222 mutex_exit(&zp->z_acl_lock);
2229 DTRACE_PROBE3(zfs__ace__denies,
2231 zfs_ace_hdr_t *, acep,
2232 uint32_t, mask_matched);
2233 deny_mask |= mask_matched;
2235 DTRACE_PROBE3(zfs__ace__allows,
2237 zfs_ace_hdr_t *, acep,
2238 uint32_t, mask_matched);
2240 mutex_exit(&zp->z_acl_lock);
2244 *working_mode &= ~mask_matched;
2248 if (*working_mode == 0)
2252 mutex_exit(&zp->z_acl_lock);
2254 /* Put the found 'denies' back on the working mode */
2256 *working_mode |= deny_mask;
2258 } else if (*working_mode) {
2266 * Return true if any access whatsoever granted, we don't actually
2267 * care what access is granted.
2270 zfs_has_access(znode_t *zp, cred_t *cr)
2272 uint32_t have = ACE_ALL_PERMS;
2274 if (zfs_zaccess_aces_check(zp, &have, B_TRUE, cr) != 0) {
2277 owner = zfs_fuid_map_id(zp->z_zfsvfs, zp->z_uid, cr, ZFS_OWNER);
2278 return (secpolicy_vnode_any_access(cr, ZTOV(zp), owner) == 0);
2284 zfs_zaccess_common(znode_t *zp, uint32_t v4_mode, uint32_t *working_mode,
2285 boolean_t *check_privs, boolean_t skipaclchk, cred_t *cr)
2287 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2290 *working_mode = v4_mode;
2291 *check_privs = B_TRUE;
2294 * Short circuit empty requests
2296 if (v4_mode == 0 || zfsvfs->z_replay) {
2301 if ((err = zfs_zaccess_dataset_check(zp, v4_mode)) != 0) {
2302 *check_privs = B_FALSE;
2307 * The caller requested that the ACL check be skipped. This
2308 * would only happen if the caller checked VOP_ACCESS() with a
2309 * 32 bit ACE mask and already had the appropriate permissions.
2316 return (zfs_zaccess_aces_check(zp, working_mode, B_FALSE, cr));
2320 zfs_zaccess_append(znode_t *zp, uint32_t *working_mode, boolean_t *check_privs,
2323 if (*working_mode != ACE_WRITE_DATA)
2326 return (zfs_zaccess_common(zp, ACE_APPEND_DATA, working_mode,
2327 check_privs, B_FALSE, cr));
2331 zfs_fastaccesschk_execute(znode_t *zdp, cred_t *cr)
2333 boolean_t owner = B_FALSE;
2334 boolean_t groupmbr = B_FALSE;
2336 uid_t uid = crgetuid(cr);
2339 if (zdp->z_pflags & ZFS_AV_QUARANTINED)
2342 is_attr = ((zdp->z_pflags & ZFS_XATTR) &&
2343 (ZTOV(zdp)->v_type == VDIR));
2348 mutex_enter(&zdp->z_acl_lock);
2350 if (zdp->z_pflags & ZFS_NO_EXECS_DENIED) {
2351 mutex_exit(&zdp->z_acl_lock);
2355 if (FUID_INDEX(zdp->z_uid) != 0 || FUID_INDEX(zdp->z_gid) != 0) {
2356 mutex_exit(&zdp->z_acl_lock);
2360 if (uid == zdp->z_uid) {
2362 if (zdp->z_mode & S_IXUSR) {
2363 mutex_exit(&zdp->z_acl_lock);
2366 mutex_exit(&zdp->z_acl_lock);
2370 if (groupmember(zdp->z_gid, cr)) {
2372 if (zdp->z_mode & S_IXGRP) {
2373 mutex_exit(&zdp->z_acl_lock);
2376 mutex_exit(&zdp->z_acl_lock);
2380 if (!owner && !groupmbr) {
2381 if (zdp->z_mode & S_IXOTH) {
2382 mutex_exit(&zdp->z_acl_lock);
2387 mutex_exit(&zdp->z_acl_lock);
2390 DTRACE_PROBE(zfs__fastpath__execute__access__miss);
2391 ZFS_ENTER(zdp->z_zfsvfs);
2392 error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr);
2393 ZFS_EXIT(zdp->z_zfsvfs);
2398 * Determine whether Access should be granted/denied.
2399 * The least priv subsytem is always consulted as a basic privilege
2400 * can define any form of access.
2403 zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr)
2405 uint32_t working_mode;
2408 boolean_t check_privs;
2410 znode_t *check_zp = zp;
2414 is_attr = ((zp->z_pflags & ZFS_XATTR) && (ZTOV(zp)->v_type == VDIR));
2417 * If attribute then validate against base file
2422 if ((error = sa_lookup(zp->z_sa_hdl,
2423 SA_ZPL_PARENT(zp->z_zfsvfs), &parent,
2424 sizeof (parent))) != 0)
2427 if ((error = zfs_zget(zp->z_zfsvfs,
2428 parent, &xzp)) != 0) {
2435 * fixup mode to map to xattr perms
2438 if (mode & (ACE_WRITE_DATA|ACE_APPEND_DATA)) {
2439 mode &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
2440 mode |= ACE_WRITE_NAMED_ATTRS;
2443 if (mode & (ACE_READ_DATA|ACE_EXECUTE)) {
2444 mode &= ~(ACE_READ_DATA|ACE_EXECUTE);
2445 mode |= ACE_READ_NAMED_ATTRS;
2449 owner = zfs_fuid_map_id(zp->z_zfsvfs, zp->z_uid, cr, ZFS_OWNER);
2451 * Map the bits required to the standard vnode flags VREAD|VWRITE|VEXEC
2452 * in needed_bits. Map the bits mapped by working_mode (currently
2453 * missing) in missing_bits.
2454 * Call secpolicy_vnode_access2() with (needed_bits & ~checkmode),
2459 working_mode = mode;
2460 if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES)) &&
2461 owner == crgetuid(cr))
2462 working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES);
2464 if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS|
2465 ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE))
2466 needed_bits |= VREAD;
2467 if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
2468 ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
2469 needed_bits |= VWRITE;
2470 if (working_mode & ACE_EXECUTE)
2471 needed_bits |= VEXEC;
2473 if ((error = zfs_zaccess_common(check_zp, mode, &working_mode,
2474 &check_privs, skipaclchk, cr)) == 0) {
2477 return (secpolicy_vnode_access2(cr, ZTOV(zp), owner,
2478 needed_bits, needed_bits));
2481 if (error && !check_privs) {
2487 if (error && (flags & V_APPEND)) {
2488 error = zfs_zaccess_append(zp, &working_mode, &check_privs, cr);
2491 if (error && check_privs) {
2492 mode_t checkmode = 0;
2495 * First check for implicit owner permission on
2496 * read_acl/read_attributes
2500 ASSERT(working_mode != 0);
2502 if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES) &&
2503 owner == crgetuid(cr)))
2504 working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES);
2506 if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS|
2507 ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE))
2509 if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
2510 ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
2511 checkmode |= VWRITE;
2512 if (working_mode & ACE_EXECUTE)
2515 error = secpolicy_vnode_access2(cr, ZTOV(check_zp), owner,
2516 needed_bits & ~checkmode, needed_bits);
2518 if (error == 0 && (working_mode & ACE_WRITE_OWNER))
2519 error = secpolicy_vnode_chown(cr, owner);
2520 if (error == 0 && (working_mode & ACE_WRITE_ACL))
2521 error = secpolicy_vnode_setdac(cr, owner);
2523 if (error == 0 && (working_mode &
2524 (ACE_DELETE|ACE_DELETE_CHILD)))
2525 error = secpolicy_vnode_remove(cr);
2527 if (error == 0 && (working_mode & ACE_SYNCHRONIZE)) {
2528 error = secpolicy_vnode_chown(cr, owner);
2532 * See if any bits other than those already checked
2533 * for are still present. If so then return EACCES
2535 if (working_mode & ~(ZFS_CHECKED_MASKS)) {
2539 } else if (error == 0) {
2540 error = secpolicy_vnode_access2(cr, ZTOV(zp), owner,
2541 needed_bits, needed_bits);
2552 * Translate traditional unix VREAD/VWRITE/VEXEC mode into
2553 * native ACL format and call zfs_zaccess()
2556 zfs_zaccess_rwx(znode_t *zp, mode_t mode, int flags, cred_t *cr)
2558 return (zfs_zaccess(zp, zfs_unix_to_v4(mode >> 6), flags, B_FALSE, cr));
2562 * Access function for secpolicy_vnode_setattr
2565 zfs_zaccess_unix(znode_t *zp, mode_t mode, cred_t *cr)
2567 int v4_mode = zfs_unix_to_v4(mode >> 6);
2569 return (zfs_zaccess(zp, v4_mode, 0, B_FALSE, cr));
2573 zfs_delete_final_check(znode_t *zp, znode_t *dzp,
2574 mode_t available_perms, cred_t *cr)
2579 downer = zfs_fuid_map_id(dzp->z_zfsvfs, dzp->z_uid, cr, ZFS_OWNER);
2581 error = secpolicy_vnode_access2(cr, ZTOV(dzp),
2582 downer, available_perms, VWRITE|VEXEC);
2585 error = zfs_sticky_remove_access(dzp, zp, cr);
2591 * Determine whether Access should be granted/deny, without
2592 * consulting least priv subsystem.
2595 * The following chart is the recommended NFSv4 enforcement for
2596 * ability to delete an object.
2598 * -------------------------------------------------------
2599 * | Parent Dir | Target Object Permissions |
2601 * -------------------------------------------------------
2602 * | | ACL Allows | ACL Denies| Delete |
2603 * | | Delete | Delete | unspecified|
2604 * -------------------------------------------------------
2605 * | ACL Allows | Permit | Permit | Permit |
2606 * | DELETE_CHILD | |
2607 * -------------------------------------------------------
2608 * | ACL Denies | Permit | Deny | Deny |
2609 * | DELETE_CHILD | | | |
2610 * -------------------------------------------------------
2611 * | ACL specifies | | | |
2612 * | only allow | Permit | Permit | Permit |
2613 * | write and | | | |
2615 * -------------------------------------------------------
2616 * | ACL denies | | | |
2617 * | write and | Permit | Deny | Deny |
2619 * -------------------------------------------------------
2622 * No search privilege, can't even look up file?
2626 zfs_zaccess_delete(znode_t *dzp, znode_t *zp, cred_t *cr)
2628 uint32_t dzp_working_mode = 0;
2629 uint32_t zp_working_mode = 0;
2630 int dzp_error, zp_error;
2631 mode_t available_perms;
2632 boolean_t dzpcheck_privs = B_TRUE;
2633 boolean_t zpcheck_privs = B_TRUE;
2636 * We want specific DELETE permissions to
2637 * take precedence over WRITE/EXECUTE. We don't
2638 * want an ACL such as this to mess us up.
2639 * user:joe:write_data:deny,user:joe:delete:allow
2641 * However, deny permissions may ultimately be overridden
2642 * by secpolicy_vnode_access().
2644 * We will ask for all of the necessary permissions and then
2645 * look at the working modes from the directory and target object
2646 * to determine what was found.
2649 if (zp->z_pflags & (ZFS_IMMUTABLE | ZFS_NOUNLINK))
2654 * If the directory permissions allow the delete, we are done.
2656 if ((dzp_error = zfs_zaccess_common(dzp, ACE_DELETE_CHILD,
2657 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0)
2661 * If target object has delete permission then we are done
2663 if ((zp_error = zfs_zaccess_common(zp, ACE_DELETE, &zp_working_mode,
2664 &zpcheck_privs, B_FALSE, cr)) == 0)
2667 ASSERT(dzp_error && zp_error);
2669 if (!dzpcheck_privs)
2677 * If directory returns EACCES then delete_child was denied
2678 * due to deny delete_child. In this case send the request through
2679 * secpolicy_vnode_remove(). We don't use zfs_delete_final_check()
2680 * since that *could* allow the delete based on write/execute permission
2681 * and we want delete permissions to override write/execute.
2684 if (dzp_error == EACCES)
2685 return (secpolicy_vnode_remove(cr));
2689 * only need to see if we have write/execute on directory.
2692 dzp_error = zfs_zaccess_common(dzp, ACE_EXECUTE|ACE_WRITE_DATA,
2693 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr);
2695 if (dzp_error != 0 && !dzpcheck_privs)
2702 available_perms = (dzp_working_mode & ACE_WRITE_DATA) ? 0 : VWRITE;
2703 available_perms |= (dzp_working_mode & ACE_EXECUTE) ? 0 : VEXEC;
2705 return (zfs_delete_final_check(zp, dzp, available_perms, cr));
2710 zfs_zaccess_rename(znode_t *sdzp, znode_t *szp, znode_t *tdzp,
2711 znode_t *tzp, cred_t *cr)
2716 if (szp->z_pflags & ZFS_AV_QUARANTINED)
2719 add_perm = (ZTOV(szp)->v_type == VDIR) ?
2720 ACE_ADD_SUBDIRECTORY : ACE_ADD_FILE;
2723 * Rename permissions are combination of delete permission +
2724 * add file/subdir permission.
2728 * first make sure we do the delete portion.
2730 * If that succeeds then check for add_file/add_subdir permissions
2733 if ((error = zfs_zaccess_delete(sdzp, szp, cr)))
2737 * If we have a tzp, see if we can delete it?
2740 if ((error = zfs_zaccess_delete(tdzp, tzp, cr)))
2745 * Now check for add permissions
2747 error = zfs_zaccess(tdzp, add_perm, 0, B_FALSE, cr);
2752 #endif /* HAVE_ZPL */