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);
648 * Copy ACE to internal ZFS format.
649 * While processing the ACL each ACE will be validated for correctness.
650 * ACE FUIDs will be created later.
653 zfs_copy_ace_2_fuid(zfsvfs_t *zfsvfs, vtype_t obj_type, zfs_acl_t *aclp,
654 void *datap, zfs_ace_t *z_acl, uint64_t aclcnt, size_t *size,
655 zfs_fuid_info_t **fuidp, cred_t *cr)
659 zfs_ace_t *aceptr = z_acl;
661 zfs_object_ace_t *zobjacep;
662 ace_object_t *aceobjp;
664 for (i = 0; i != aclcnt; i++) {
665 aceptr->z_hdr.z_access_mask = acep->a_access_mask;
666 aceptr->z_hdr.z_flags = acep->a_flags;
667 aceptr->z_hdr.z_type = acep->a_type;
668 entry_type = aceptr->z_hdr.z_flags & ACE_TYPE_FLAGS;
669 if (entry_type != ACE_OWNER && entry_type != OWNING_GROUP &&
670 entry_type != ACE_EVERYONE) {
671 aceptr->z_fuid = zfs_fuid_create(zfsvfs, acep->a_who,
672 cr, (entry_type == 0) ?
673 ZFS_ACE_USER : ZFS_ACE_GROUP, fuidp);
677 * Make sure ACE is valid
679 if (zfs_ace_valid(obj_type, aclp, aceptr->z_hdr.z_type,
680 aceptr->z_hdr.z_flags) != B_TRUE)
683 switch (acep->a_type) {
684 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
685 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
686 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
687 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
688 zobjacep = (zfs_object_ace_t *)aceptr;
689 aceobjp = (ace_object_t *)acep;
691 bcopy(aceobjp->a_obj_type, zobjacep->z_object_type,
692 sizeof (aceobjp->a_obj_type));
693 bcopy(aceobjp->a_inherit_obj_type,
694 zobjacep->z_inherit_type,
695 sizeof (aceobjp->a_inherit_obj_type));
696 acep = (ace_t *)((caddr_t)acep + sizeof (ace_object_t));
699 acep = (ace_t *)((caddr_t)acep + sizeof (ace_t));
702 aceptr = (zfs_ace_t *)((caddr_t)aceptr +
703 aclp->z_ops.ace_size(aceptr));
706 *size = (caddr_t)aceptr - (caddr_t)z_acl;
712 * Copy ZFS ACEs to fixed size ace_t layout
715 zfs_copy_fuid_2_ace(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, cred_t *cr,
716 void *datap, int filter)
719 uint32_t access_mask;
720 uint16_t iflags, type;
721 zfs_ace_hdr_t *zacep = NULL;
723 ace_object_t *objacep;
724 zfs_object_ace_t *zobjacep;
728 while ((zacep = zfs_acl_next_ace(aclp, zacep,
729 &who, &access_mask, &iflags, &type))) {
732 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
733 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
734 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
735 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
739 zobjacep = (zfs_object_ace_t *)zacep;
740 objacep = (ace_object_t *)acep;
741 bcopy(zobjacep->z_object_type,
743 sizeof (zobjacep->z_object_type));
744 bcopy(zobjacep->z_inherit_type,
745 objacep->a_inherit_obj_type,
746 sizeof (zobjacep->z_inherit_type));
747 ace_size = sizeof (ace_object_t);
750 ace_size = sizeof (ace_t);
754 entry_type = (iflags & ACE_TYPE_FLAGS);
755 if ((entry_type != ACE_OWNER &&
756 entry_type != OWNING_GROUP &&
757 entry_type != ACE_EVERYONE)) {
758 acep->a_who = zfs_fuid_map_id(zfsvfs, who,
759 cr, (entry_type & ACE_IDENTIFIER_GROUP) ?
760 ZFS_ACE_GROUP : ZFS_ACE_USER);
762 acep->a_who = (uid_t)(int64_t)who;
764 acep->a_access_mask = access_mask;
765 acep->a_flags = iflags;
767 acep = (ace_t *)((caddr_t)acep + ace_size);
772 zfs_copy_ace_2_oldace(vtype_t obj_type, zfs_acl_t *aclp, ace_t *acep,
773 zfs_oldace_t *z_acl, int aclcnt, size_t *size)
776 zfs_oldace_t *aceptr = z_acl;
778 for (i = 0; i != aclcnt; i++, aceptr++) {
779 aceptr->z_access_mask = acep[i].a_access_mask;
780 aceptr->z_type = acep[i].a_type;
781 aceptr->z_flags = acep[i].a_flags;
782 aceptr->z_fuid = acep[i].a_who;
784 * Make sure ACE is valid
786 if (zfs_ace_valid(obj_type, aclp, aceptr->z_type,
787 aceptr->z_flags) != B_TRUE)
790 *size = (caddr_t)aceptr - (caddr_t)z_acl;
795 * convert old ACL format to new
798 zfs_acl_xform(znode_t *zp, zfs_acl_t *aclp, cred_t *cr)
800 zfs_oldace_t *oldaclp;
802 uint16_t type, iflags;
803 uint32_t access_mask;
806 zfs_acl_node_t *newaclnode;
808 ASSERT(aclp->z_version == ZFS_ACL_VERSION_INITIAL);
810 * First create the ACE in a contiguous piece of memory
811 * for zfs_copy_ace_2_fuid().
813 * We only convert an ACL once, so this won't happen
816 oldaclp = kmem_alloc(sizeof (zfs_oldace_t) * aclp->z_acl_count,
819 while ((cookie = zfs_acl_next_ace(aclp, cookie, &who,
820 &access_mask, &iflags, &type))) {
821 oldaclp[i].z_flags = iflags;
822 oldaclp[i].z_type = type;
823 oldaclp[i].z_fuid = who;
824 oldaclp[i++].z_access_mask = access_mask;
827 newaclnode = zfs_acl_node_alloc(aclp->z_acl_count *
828 sizeof (zfs_object_ace_t));
829 aclp->z_ops = zfs_acl_fuid_ops;
830 VERIFY(zfs_copy_ace_2_fuid(zp->z_zfsvfs, ZTOV(zp)->v_type, aclp,
831 oldaclp, newaclnode->z_acldata, aclp->z_acl_count,
832 &newaclnode->z_size, NULL, cr) == 0);
833 newaclnode->z_ace_count = aclp->z_acl_count;
834 aclp->z_version = ZFS_ACL_VERSION;
835 kmem_free(oldaclp, aclp->z_acl_count * sizeof (zfs_oldace_t));
838 * Release all previous ACL nodes
841 zfs_acl_release_nodes(aclp);
843 list_insert_head(&aclp->z_acl, newaclnode);
845 aclp->z_acl_bytes = newaclnode->z_size;
846 aclp->z_acl_count = newaclnode->z_ace_count;
851 * Convert unix access mask to v4 access mask
854 zfs_unix_to_v4(uint32_t access_mask)
856 uint32_t new_mask = 0;
858 if (access_mask & S_IXOTH)
859 new_mask |= ACE_EXECUTE;
860 if (access_mask & S_IWOTH)
861 new_mask |= ACE_WRITE_DATA;
862 if (access_mask & S_IROTH)
863 new_mask |= ACE_READ_DATA;
868 zfs_set_ace(zfs_acl_t *aclp, void *acep, uint32_t access_mask,
869 uint16_t access_type, uint64_t fuid, uint16_t entry_type)
871 uint16_t type = entry_type & ACE_TYPE_FLAGS;
873 aclp->z_ops.ace_mask_set(acep, access_mask);
874 aclp->z_ops.ace_type_set(acep, access_type);
875 aclp->z_ops.ace_flags_set(acep, entry_type);
876 if ((type != ACE_OWNER && type != OWNING_GROUP &&
877 type != ACE_EVERYONE))
878 aclp->z_ops.ace_who_set(acep, fuid);
882 * Determine mode of file based on ACL.
883 * Also, create FUIDs for any User/Group ACEs
886 zfs_mode_compute(uint64_t fmode, zfs_acl_t *aclp,
887 uint64_t *pflags, uint64_t fuid, uint64_t fgid)
892 zfs_ace_hdr_t *acep = NULL;
894 uint16_t iflags, type;
895 uint32_t access_mask;
896 boolean_t an_exec_denied = B_FALSE;
898 mode = (fmode & (S_IFMT | S_ISUID | S_ISGID | S_ISVTX));
900 while ((acep = zfs_acl_next_ace(aclp, acep, &who,
901 &access_mask, &iflags, &type))) {
903 if (!zfs_acl_valid_ace_type(type, iflags))
906 entry_type = (iflags & ACE_TYPE_FLAGS);
909 * Skip over owner@, group@ or everyone@ inherit only ACEs
911 if ((iflags & ACE_INHERIT_ONLY_ACE) &&
912 (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
913 entry_type == OWNING_GROUP))
916 if (entry_type == ACE_OWNER || (entry_type == 0 &&
918 if ((access_mask & ACE_READ_DATA) &&
919 (!(seen & S_IRUSR))) {
925 if ((access_mask & ACE_WRITE_DATA) &&
926 (!(seen & S_IWUSR))) {
932 if ((access_mask & ACE_EXECUTE) &&
933 (!(seen & S_IXUSR))) {
939 } else if (entry_type == OWNING_GROUP ||
940 (entry_type == ACE_IDENTIFIER_GROUP && who == fgid)) {
941 if ((access_mask & ACE_READ_DATA) &&
942 (!(seen & S_IRGRP))) {
948 if ((access_mask & ACE_WRITE_DATA) &&
949 (!(seen & S_IWGRP))) {
955 if ((access_mask & ACE_EXECUTE) &&
956 (!(seen & S_IXGRP))) {
962 } else if (entry_type == ACE_EVERYONE) {
963 if ((access_mask & ACE_READ_DATA)) {
964 if (!(seen & S_IRUSR)) {
970 if (!(seen & S_IRGRP)) {
976 if (!(seen & S_IROTH)) {
983 if ((access_mask & ACE_WRITE_DATA)) {
984 if (!(seen & S_IWUSR)) {
990 if (!(seen & S_IWGRP)) {
996 if (!(seen & S_IWOTH)) {
1003 if ((access_mask & ACE_EXECUTE)) {
1004 if (!(seen & S_IXUSR)) {
1006 if (type == ALLOW) {
1010 if (!(seen & S_IXGRP)) {
1012 if (type == ALLOW) {
1016 if (!(seen & S_IXOTH)) {
1018 if (type == ALLOW) {
1025 * Only care if this IDENTIFIER_GROUP or
1026 * USER ACE denies execute access to someone,
1027 * mode is not affected
1029 if ((access_mask & ACE_EXECUTE) && type == DENY)
1030 an_exec_denied = B_TRUE;
1035 * Failure to allow is effectively a deny, so execute permission
1036 * is denied if it was never mentioned or if we explicitly
1037 * weren't allowed it.
1039 if (!an_exec_denied &&
1040 ((seen & ALL_MODE_EXECS) != ALL_MODE_EXECS ||
1041 (mode & ALL_MODE_EXECS) != ALL_MODE_EXECS))
1042 an_exec_denied = B_TRUE;
1045 *pflags &= ~ZFS_NO_EXECS_DENIED;
1047 *pflags |= ZFS_NO_EXECS_DENIED;
1053 * Read an external acl object. If the intent is to modify, always
1054 * create a new acl and leave any cached acl in place.
1057 zfs_acl_node_read(znode_t *zp, boolean_t have_lock, zfs_acl_t **aclpp,
1058 boolean_t will_modify)
1063 zfs_acl_node_t *aclnode;
1064 zfs_acl_phys_t znode_acl;
1067 boolean_t drop_lock = B_FALSE;
1069 ASSERT(MUTEX_HELD(&zp->z_acl_lock));
1071 if (zp->z_acl_cached && !will_modify) {
1072 *aclpp = zp->z_acl_cached;
1077 * close race where znode could be upgrade while trying to
1078 * read the znode attributes.
1080 * But this could only happen if the file isn't already an SA
1083 if (!zp->z_is_sa && !have_lock) {
1084 mutex_enter(&zp->z_lock);
1087 version = zfs_znode_acl_version(zp);
1089 if ((error = zfs_acl_znode_info(zp, &aclsize,
1090 &acl_count, &znode_acl)) != 0) {
1094 aclp = zfs_acl_alloc(version);
1096 aclp->z_acl_count = acl_count;
1097 aclp->z_acl_bytes = aclsize;
1099 aclnode = zfs_acl_node_alloc(aclsize);
1100 aclnode->z_ace_count = aclp->z_acl_count;
1101 aclnode->z_size = aclsize;
1104 if (znode_acl.z_acl_extern_obj) {
1105 error = dmu_read(zp->z_zfsvfs->z_os,
1106 znode_acl.z_acl_extern_obj, 0, aclnode->z_size,
1107 aclnode->z_acldata, DMU_READ_PREFETCH);
1109 bcopy(znode_acl.z_ace_data, aclnode->z_acldata,
1113 error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DACL_ACES(zp->z_zfsvfs),
1114 aclnode->z_acldata, aclnode->z_size);
1119 zfs_acl_node_free(aclnode);
1120 /* convert checksum errors into IO errors */
1121 if (error == ECKSUM)
1126 list_insert_head(&aclp->z_acl, aclnode);
1130 zp->z_acl_cached = aclp;
1133 mutex_exit(&zp->z_lock);
1139 zfs_acl_data_locator(void **dataptr, uint32_t *length, uint32_t buflen,
1140 boolean_t start, void *userdata)
1142 zfs_acl_locator_cb_t *cb = (zfs_acl_locator_cb_t *)userdata;
1145 cb->cb_acl_node = list_head(&cb->cb_aclp->z_acl);
1147 cb->cb_acl_node = list_next(&cb->cb_aclp->z_acl,
1150 *dataptr = cb->cb_acl_node->z_acldata;
1151 *length = cb->cb_acl_node->z_size;
1155 zfs_acl_chown_setattr(znode_t *zp)
1160 ASSERT(MUTEX_HELD(&zp->z_lock));
1161 ASSERT(MUTEX_HELD(&zp->z_acl_lock));
1163 if ((error = zfs_acl_node_read(zp, B_TRUE, &aclp, B_FALSE)) == 0)
1164 zp->z_mode = zfs_mode_compute(zp->z_mode, aclp,
1165 &zp->z_pflags, zp->z_uid, zp->z_gid);
1170 * common code for setting ACLs.
1172 * This function is called from zfs_mode_update, zfs_perm_init, and zfs_setacl.
1173 * zfs_setacl passes a non-NULL inherit pointer (ihp) to indicate that it's
1174 * already checked the acl and knows whether to inherit.
1177 zfs_aclset_common(znode_t *zp, zfs_acl_t *aclp, cred_t *cr, dmu_tx_t *tx)
1180 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1181 dmu_object_type_t otype;
1182 zfs_acl_locator_cb_t locate = { 0 };
1184 sa_bulk_attr_t bulk[5];
1190 mode = zfs_mode_compute(mode, aclp, &zp->z_pflags,
1191 zp->z_uid, zp->z_gid);
1194 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
1195 &mode, sizeof (mode));
1196 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
1197 &zp->z_pflags, sizeof (zp->z_pflags));
1198 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
1199 &ctime, sizeof (ctime));
1201 if (zp->z_acl_cached) {
1202 zfs_acl_free(zp->z_acl_cached);
1203 zp->z_acl_cached = NULL;
1209 if (!zfsvfs->z_use_fuids) {
1210 otype = DMU_OT_OLDACL;
1212 if ((aclp->z_version == ZFS_ACL_VERSION_INITIAL) &&
1213 (zfsvfs->z_version >= ZPL_VERSION_FUID))
1214 zfs_acl_xform(zp, aclp, cr);
1215 ASSERT(aclp->z_version >= ZFS_ACL_VERSION_FUID);
1220 * Arrgh, we have to handle old on disk format
1221 * as well as newer (preferred) SA format.
1224 if (zp->z_is_sa) { /* the easy case, just update the ACL attribute */
1225 locate.cb_aclp = aclp;
1226 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_ACES(zfsvfs),
1227 zfs_acl_data_locator, &locate, aclp->z_acl_bytes);
1228 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_COUNT(zfsvfs),
1229 NULL, &aclp->z_acl_count, sizeof (uint64_t));
1230 } else { /* Painful legacy way */
1231 zfs_acl_node_t *aclnode;
1233 zfs_acl_phys_t acl_phys;
1236 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zfsvfs),
1237 &acl_phys, sizeof (acl_phys))) != 0)
1240 aoid = acl_phys.z_acl_extern_obj;
1242 if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
1244 * If ACL was previously external and we are now
1245 * converting to new ACL format then release old
1246 * ACL object and create a new one.
1249 aclp->z_version != acl_phys.z_acl_version) {
1250 error = dmu_object_free(zfsvfs->z_os, aoid, tx);
1256 aoid = dmu_object_alloc(zfsvfs->z_os,
1257 otype, aclp->z_acl_bytes,
1258 otype == DMU_OT_ACL ?
1259 DMU_OT_SYSACL : DMU_OT_NONE,
1260 otype == DMU_OT_ACL ?
1261 DN_MAX_BONUSLEN : 0, tx);
1263 (void) dmu_object_set_blocksize(zfsvfs->z_os,
1264 aoid, aclp->z_acl_bytes, 0, tx);
1266 acl_phys.z_acl_extern_obj = aoid;
1267 for (aclnode = list_head(&aclp->z_acl); aclnode;
1268 aclnode = list_next(&aclp->z_acl, aclnode)) {
1269 if (aclnode->z_ace_count == 0)
1271 dmu_write(zfsvfs->z_os, aoid, off,
1272 aclnode->z_size, aclnode->z_acldata, tx);
1273 off += aclnode->z_size;
1276 void *start = acl_phys.z_ace_data;
1278 * Migrating back embedded?
1280 if (acl_phys.z_acl_extern_obj) {
1281 error = dmu_object_free(zfsvfs->z_os,
1282 acl_phys.z_acl_extern_obj, tx);
1285 acl_phys.z_acl_extern_obj = 0;
1288 for (aclnode = list_head(&aclp->z_acl); aclnode;
1289 aclnode = list_next(&aclp->z_acl, aclnode)) {
1290 if (aclnode->z_ace_count == 0)
1292 bcopy(aclnode->z_acldata, start,
1294 start = (caddr_t)start + aclnode->z_size;
1298 * If Old version then swap count/bytes to match old
1299 * layout of znode_acl_phys_t.
1301 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
1302 acl_phys.z_acl_size = aclp->z_acl_count;
1303 acl_phys.z_acl_count = aclp->z_acl_bytes;
1305 acl_phys.z_acl_size = aclp->z_acl_bytes;
1306 acl_phys.z_acl_count = aclp->z_acl_count;
1308 acl_phys.z_acl_version = aclp->z_version;
1310 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL,
1311 &acl_phys, sizeof (acl_phys));
1315 * Replace ACL wide bits, but first clear them.
1317 zp->z_pflags &= ~ZFS_ACL_WIDE_FLAGS;
1319 zp->z_pflags |= aclp->z_hints;
1321 if (ace_trivial_common(aclp, 0, zfs_ace_walk) == 0)
1322 zp->z_pflags |= ZFS_ACL_TRIVIAL;
1324 zfs_tstamp_update_setup(zp, STATE_CHANGED, NULL, ctime, B_TRUE);
1325 return (sa_bulk_update(zp->z_sa_hdl, bulk, count, tx));
1329 zfs_acl_chmod(zfsvfs_t *zfsvfs, uint64_t mode, zfs_acl_t *aclp)
1333 int new_count, new_bytes;
1336 uint16_t iflags, type;
1337 uint32_t access_mask;
1338 zfs_acl_node_t *newnode;
1339 size_t abstract_size = aclp->z_ops.ace_abstract_size();
1341 uint32_t owner, group, everyone;
1342 uint32_t deny1, deny2, allow0;
1344 new_count = new_bytes = 0;
1346 acl_trivial_access_masks((mode_t)mode, &allow0, &deny1, &deny2,
1347 &owner, &group, &everyone);
1349 newnode = zfs_acl_node_alloc((abstract_size * 6) + aclp->z_acl_bytes);
1351 zacep = newnode->z_acldata;
1353 zfs_set_ace(aclp, zacep, allow0, ALLOW, -1, ACE_OWNER);
1354 zacep = (void *)((uintptr_t)zacep + abstract_size);
1356 new_bytes += abstract_size;
1358 zfs_set_ace(aclp, zacep, deny1, DENY, -1, ACE_OWNER);
1359 zacep = (void *)((uintptr_t)zacep + abstract_size);
1361 new_bytes += abstract_size;
1364 zfs_set_ace(aclp, zacep, deny2, DENY, -1, OWNING_GROUP);
1365 zacep = (void *)((uintptr_t)zacep + abstract_size);
1367 new_bytes += abstract_size;
1370 while ((acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
1372 uint16_t inherit_flags;
1374 entry_type = (iflags & ACE_TYPE_FLAGS);
1375 inherit_flags = (iflags & ALL_INHERIT);
1377 if ((entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
1378 (entry_type == OWNING_GROUP)) &&
1379 ((inherit_flags & ACE_INHERIT_ONLY_ACE) == 0)) {
1383 if ((type != ALLOW && type != DENY) ||
1384 (inherit_flags & ACE_INHERIT_ONLY_ACE)) {
1386 aclp->z_hints |= ZFS_INHERIT_ACE;
1388 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1389 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1390 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1391 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
1392 aclp->z_hints |= ZFS_ACL_OBJ_ACE;
1398 * Limit permissions to be no greater than
1401 if (zfsvfs->z_acl_inherit == ZFS_ACL_RESTRICTED) {
1402 if (!(mode & S_IRGRP))
1403 access_mask &= ~ACE_READ_DATA;
1404 if (!(mode & S_IWGRP))
1406 ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
1407 if (!(mode & S_IXGRP))
1408 access_mask &= ~ACE_EXECUTE;
1410 ~(ACE_WRITE_OWNER|ACE_WRITE_ACL|
1411 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS);
1414 zfs_set_ace(aclp, zacep, access_mask, type, who, iflags);
1415 ace_size = aclp->z_ops.ace_size(acep);
1416 zacep = (void *)((uintptr_t)zacep + ace_size);
1418 new_bytes += ace_size;
1420 zfs_set_ace(aclp, zacep, owner, 0, -1, ACE_OWNER);
1421 zacep = (void *)((uintptr_t)zacep + abstract_size);
1422 zfs_set_ace(aclp, zacep, group, 0, -1, OWNING_GROUP);
1423 zacep = (void *)((uintptr_t)zacep + abstract_size);
1424 zfs_set_ace(aclp, zacep, everyone, 0, -1, ACE_EVERYONE);
1427 new_bytes += abstract_size * 3;
1428 zfs_acl_release_nodes(aclp);
1429 aclp->z_acl_count = new_count;
1430 aclp->z_acl_bytes = new_bytes;
1431 newnode->z_ace_count = new_count;
1432 newnode->z_size = new_bytes;
1433 list_insert_tail(&aclp->z_acl, newnode);
1437 zfs_acl_chmod_setattr(znode_t *zp, zfs_acl_t **aclp, uint64_t mode)
1439 mutex_enter(&zp->z_acl_lock);
1440 mutex_enter(&zp->z_lock);
1441 *aclp = zfs_acl_alloc(zfs_acl_version_zp(zp));
1442 (*aclp)->z_hints = zp->z_pflags & V4_ACL_WIDE_FLAGS;
1443 zfs_acl_chmod(zp->z_zfsvfs, mode, *aclp);
1444 mutex_exit(&zp->z_lock);
1445 mutex_exit(&zp->z_acl_lock);
1450 * strip off write_owner and write_acl
1453 zfs_restricted_update(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, void *acep)
1455 uint32_t mask = aclp->z_ops.ace_mask_get(acep);
1457 if ((zfsvfs->z_acl_inherit == ZFS_ACL_RESTRICTED) &&
1458 (aclp->z_ops.ace_type_get(acep) == ALLOW)) {
1459 mask &= ~RESTRICTED_CLEAR;
1460 aclp->z_ops.ace_mask_set(acep, mask);
1465 * Should ACE be inherited?
1468 zfs_ace_can_use(vtype_t vtype, uint16_t acep_flags)
1470 int iflags = (acep_flags & 0xf);
1472 if ((vtype == VDIR) && (iflags & ACE_DIRECTORY_INHERIT_ACE))
1474 else if (iflags & ACE_FILE_INHERIT_ACE)
1475 return (!((vtype == VDIR) &&
1476 (iflags & ACE_NO_PROPAGATE_INHERIT_ACE)));
1481 * inherit inheritable ACEs from parent
1484 zfs_acl_inherit(zfsvfs_t *zfsvfs, vtype_t vtype, zfs_acl_t *paclp,
1485 uint64_t mode, boolean_t *need_chmod)
1489 zfs_acl_node_t *aclnode;
1490 zfs_acl_t *aclp = NULL;
1492 uint32_t access_mask;
1493 uint16_t iflags, newflags, type;
1495 void *data1, *data2;
1496 size_t data1sz, data2sz;
1497 boolean_t vdir = vtype == VDIR;
1498 boolean_t vreg = vtype == VREG;
1499 boolean_t passthrough, passthrough_x, noallow;
1502 zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH_X;
1503 passthrough = passthrough_x ||
1504 zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH;
1506 zfsvfs->z_acl_inherit == ZFS_ACL_NOALLOW;
1508 *need_chmod = B_TRUE;
1510 aclp = zfs_acl_alloc(paclp->z_version);
1511 if (zfsvfs->z_acl_inherit == ZFS_ACL_DISCARD || vtype == VLNK)
1513 while ((pacep = zfs_acl_next_ace(paclp, pacep, &who,
1514 &access_mask, &iflags, &type))) {
1517 * don't inherit bogus ACEs
1519 if (!zfs_acl_valid_ace_type(type, iflags))
1522 if (noallow && type == ALLOW)
1525 ace_size = aclp->z_ops.ace_size(pacep);
1527 if (!zfs_ace_can_use(vtype, iflags))
1531 * If owner@, group@, or everyone@ inheritable
1532 * then zfs_acl_chmod() isn't needed.
1535 ((iflags & (ACE_OWNER|ACE_EVERYONE)) ||
1536 ((iflags & OWNING_GROUP) ==
1537 OWNING_GROUP)) && (vreg || (vdir && (iflags &
1538 ACE_DIRECTORY_INHERIT_ACE)))) {
1539 *need_chmod = B_FALSE;
1542 if (!vdir && passthrough_x &&
1543 ((mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0)) {
1544 access_mask &= ~ACE_EXECUTE;
1547 aclnode = zfs_acl_node_alloc(ace_size);
1548 list_insert_tail(&aclp->z_acl, aclnode);
1549 acep = aclnode->z_acldata;
1551 zfs_set_ace(aclp, acep, access_mask, type,
1552 who, iflags|ACE_INHERITED_ACE);
1555 * Copy special opaque data if any
1557 if ((data1sz = paclp->z_ops.ace_data(pacep, &data1)) != 0) {
1558 VERIFY((data2sz = aclp->z_ops.ace_data(acep,
1559 &data2)) == data1sz);
1560 bcopy(data1, data2, data2sz);
1563 aclp->z_acl_count++;
1564 aclnode->z_ace_count++;
1565 aclp->z_acl_bytes += aclnode->z_size;
1566 newflags = aclp->z_ops.ace_flags_get(acep);
1569 aclp->z_hints |= ZFS_INHERIT_ACE;
1571 if ((iflags & ACE_NO_PROPAGATE_INHERIT_ACE) || !vdir) {
1572 newflags &= ~ALL_INHERIT;
1573 aclp->z_ops.ace_flags_set(acep,
1574 newflags|ACE_INHERITED_ACE);
1575 zfs_restricted_update(zfsvfs, aclp, acep);
1582 * If only FILE_INHERIT is set then turn on
1585 if ((iflags & (ACE_FILE_INHERIT_ACE |
1586 ACE_DIRECTORY_INHERIT_ACE)) == ACE_FILE_INHERIT_ACE) {
1587 newflags |= ACE_INHERIT_ONLY_ACE;
1588 aclp->z_ops.ace_flags_set(acep,
1589 newflags|ACE_INHERITED_ACE);
1591 newflags &= ~ACE_INHERIT_ONLY_ACE;
1592 aclp->z_ops.ace_flags_set(acep,
1593 newflags|ACE_INHERITED_ACE);
1600 * Create file system object initial permissions
1601 * including inheritable ACEs.
1604 zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
1605 vsecattr_t *vsecp, zfs_acl_ids_t *acl_ids)
1608 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
1611 boolean_t need_chmod = B_TRUE;
1612 boolean_t inherited = B_FALSE;
1614 bzero(acl_ids, sizeof (zfs_acl_ids_t));
1615 acl_ids->z_mode = MAKEIMODE(vap->va_type, vap->va_mode);
1618 if ((error = zfs_vsec_2_aclp(zfsvfs, vap->va_type, vsecp, cr,
1619 &acl_ids->z_fuidp, &acl_ids->z_aclp)) != 0)
1622 * Determine uid and gid.
1624 if ((flag & IS_ROOT_NODE) || zfsvfs->z_replay ||
1625 ((flag & IS_XATTR) && (vap->va_type == VDIR))) {
1626 acl_ids->z_fuid = zfs_fuid_create(zfsvfs,
1627 (uint64_t)vap->va_uid, cr,
1628 ZFS_OWNER, &acl_ids->z_fuidp);
1629 acl_ids->z_fgid = zfs_fuid_create(zfsvfs,
1630 (uint64_t)vap->va_gid, cr,
1631 ZFS_GROUP, &acl_ids->z_fuidp);
1634 acl_ids->z_fuid = zfs_fuid_create_cred(zfsvfs, ZFS_OWNER,
1635 cr, &acl_ids->z_fuidp);
1636 acl_ids->z_fgid = 0;
1637 if (vap->va_mask & AT_GID) {
1638 acl_ids->z_fgid = zfs_fuid_create(zfsvfs,
1639 (uint64_t)vap->va_gid,
1640 cr, ZFS_GROUP, &acl_ids->z_fuidp);
1642 if (acl_ids->z_fgid != dzp->z_gid &&
1643 !groupmember(vap->va_gid, cr) &&
1644 secpolicy_vnode_create_gid(cr) != 0)
1645 acl_ids->z_fgid = 0;
1647 if (acl_ids->z_fgid == 0) {
1648 if (dzp->z_mode & S_ISGID) {
1652 acl_ids->z_fgid = dzp->z_gid;
1653 gid = zfs_fuid_map_id(zfsvfs, acl_ids->z_fgid,
1656 if (zfsvfs->z_use_fuids &&
1657 IS_EPHEMERAL(acl_ids->z_fgid)) {
1658 domain = zfs_fuid_idx_domain(
1659 &zfsvfs->z_fuid_idx,
1660 FUID_INDEX(acl_ids->z_fgid));
1661 rid = FUID_RID(acl_ids->z_fgid);
1662 zfs_fuid_node_add(&acl_ids->z_fuidp,
1664 FUID_INDEX(acl_ids->z_fgid),
1665 acl_ids->z_fgid, ZFS_GROUP);
1668 acl_ids->z_fgid = zfs_fuid_create_cred(zfsvfs,
1669 ZFS_GROUP, cr, &acl_ids->z_fuidp);
1676 * If we're creating a directory, and the parent directory has the
1677 * set-GID bit set, set in on the new directory.
1678 * Otherwise, if the user is neither privileged nor a member of the
1679 * file's new group, clear the file's set-GID bit.
1682 if (!(flag & IS_ROOT_NODE) && (dzp->z_mode & S_ISGID) &&
1683 (vap->va_type == VDIR)) {
1684 acl_ids->z_mode |= S_ISGID;
1686 if ((acl_ids->z_mode & S_ISGID) &&
1687 secpolicy_vnode_setids_setgids(cr, gid) != 0)
1688 acl_ids->z_mode &= ~S_ISGID;
1691 if (acl_ids->z_aclp == NULL) {
1692 mutex_enter(&dzp->z_acl_lock);
1693 mutex_enter(&dzp->z_lock);
1694 if (!(flag & IS_ROOT_NODE) && (ZTOV(dzp)->v_type == VDIR &&
1695 (dzp->z_pflags & ZFS_INHERIT_ACE)) &&
1696 !(dzp->z_pflags & ZFS_XATTR)) {
1697 VERIFY(0 == zfs_acl_node_read(dzp, B_TRUE,
1699 acl_ids->z_aclp = zfs_acl_inherit(zfsvfs,
1700 vap->va_type, paclp, acl_ids->z_mode, &need_chmod);
1704 zfs_acl_alloc(zfs_acl_version_zp(dzp));
1705 acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL;
1707 mutex_exit(&dzp->z_lock);
1708 mutex_exit(&dzp->z_acl_lock);
1710 acl_ids->z_aclp->z_hints |= (vap->va_type == VDIR) ?
1711 ZFS_ACL_AUTO_INHERIT : 0;
1712 zfs_acl_chmod(zfsvfs, acl_ids->z_mode, acl_ids->z_aclp);
1716 if (inherited || vsecp) {
1717 acl_ids->z_mode = zfs_mode_compute(acl_ids->z_mode,
1718 acl_ids->z_aclp, &acl_ids->z_aclp->z_hints,
1719 acl_ids->z_fuid, acl_ids->z_fgid);
1720 if (ace_trivial_common(acl_ids->z_aclp, 0, zfs_ace_walk) == 0)
1721 acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL;
1728 * Free ACL and fuid_infop, but not the acl_ids structure
1731 zfs_acl_ids_free(zfs_acl_ids_t *acl_ids)
1733 if (acl_ids->z_aclp)
1734 zfs_acl_free(acl_ids->z_aclp);
1735 if (acl_ids->z_fuidp)
1736 zfs_fuid_info_free(acl_ids->z_fuidp);
1737 acl_ids->z_aclp = NULL;
1738 acl_ids->z_fuidp = NULL;
1742 zfs_acl_ids_overquota(zfsvfs_t *zfsvfs, zfs_acl_ids_t *acl_ids)
1744 return (zfs_fuid_overquota(zfsvfs, B_FALSE, acl_ids->z_fuid) ||
1745 zfs_fuid_overquota(zfsvfs, B_TRUE, acl_ids->z_fgid));
1749 * Retrieve a files ACL
1752 zfs_getacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
1760 mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT |
1761 VSA_ACE_ACLFLAGS | VSA_ACE_ALLTYPES);
1766 if ((error = zfs_zaccess(zp, ACE_READ_ACL, 0, skipaclchk, cr)))
1769 mutex_enter(&zp->z_acl_lock);
1771 error = zfs_acl_node_read(zp, B_FALSE, &aclp, B_FALSE);
1773 mutex_exit(&zp->z_acl_lock);
1778 * Scan ACL to determine number of ACEs
1780 if ((zp->z_pflags & ZFS_ACL_OBJ_ACE) && !(mask & VSA_ACE_ALLTYPES)) {
1783 uint32_t access_mask;
1784 uint16_t type, iflags;
1786 while ((zacep = zfs_acl_next_ace(aclp, zacep,
1787 &who, &access_mask, &iflags, &type))) {
1789 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1790 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1791 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1792 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
1799 vsecp->vsa_aclcnt = count;
1801 count = (int)aclp->z_acl_count;
1803 if (mask & VSA_ACECNT) {
1804 vsecp->vsa_aclcnt = count;
1807 if (mask & VSA_ACE) {
1810 aclsz = count * sizeof (ace_t) +
1811 sizeof (ace_object_t) * largeace;
1813 vsecp->vsa_aclentp = kmem_alloc(aclsz, KM_SLEEP);
1814 vsecp->vsa_aclentsz = aclsz;
1816 if (aclp->z_version == ZFS_ACL_VERSION_FUID)
1817 zfs_copy_fuid_2_ace(zp->z_zfsvfs, aclp, cr,
1818 vsecp->vsa_aclentp, !(mask & VSA_ACE_ALLTYPES));
1820 zfs_acl_node_t *aclnode;
1821 void *start = vsecp->vsa_aclentp;
1823 for (aclnode = list_head(&aclp->z_acl); aclnode;
1824 aclnode = list_next(&aclp->z_acl, aclnode)) {
1825 bcopy(aclnode->z_acldata, start,
1827 start = (caddr_t)start + aclnode->z_size;
1829 ASSERT((caddr_t)start - (caddr_t)vsecp->vsa_aclentp ==
1833 if (mask & VSA_ACE_ACLFLAGS) {
1834 vsecp->vsa_aclflags = 0;
1835 if (zp->z_pflags & ZFS_ACL_DEFAULTED)
1836 vsecp->vsa_aclflags |= ACL_DEFAULTED;
1837 if (zp->z_pflags & ZFS_ACL_PROTECTED)
1838 vsecp->vsa_aclflags |= ACL_PROTECTED;
1839 if (zp->z_pflags & ZFS_ACL_AUTO_INHERIT)
1840 vsecp->vsa_aclflags |= ACL_AUTO_INHERIT;
1843 mutex_exit(&zp->z_acl_lock);
1849 zfs_vsec_2_aclp(zfsvfs_t *zfsvfs, vtype_t obj_type,
1850 vsecattr_t *vsecp, cred_t *cr, zfs_fuid_info_t **fuidp, zfs_acl_t **zaclp)
1853 zfs_acl_node_t *aclnode;
1854 int aclcnt = vsecp->vsa_aclcnt;
1857 if (vsecp->vsa_aclcnt > MAX_ACL_ENTRIES || vsecp->vsa_aclcnt <= 0)
1860 aclp = zfs_acl_alloc(zfs_acl_version(zfsvfs->z_version));
1863 aclnode = zfs_acl_node_alloc(aclcnt * sizeof (zfs_object_ace_t));
1864 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
1865 if ((error = zfs_copy_ace_2_oldace(obj_type, aclp,
1866 (ace_t *)vsecp->vsa_aclentp, aclnode->z_acldata,
1867 aclcnt, &aclnode->z_size)) != 0) {
1869 zfs_acl_node_free(aclnode);
1873 if ((error = zfs_copy_ace_2_fuid(zfsvfs, obj_type, aclp,
1874 vsecp->vsa_aclentp, aclnode->z_acldata, aclcnt,
1875 &aclnode->z_size, fuidp, cr)) != 0) {
1877 zfs_acl_node_free(aclnode);
1881 aclp->z_acl_bytes = aclnode->z_size;
1882 aclnode->z_ace_count = aclcnt;
1883 aclp->z_acl_count = aclcnt;
1884 list_insert_head(&aclp->z_acl, aclnode);
1887 * If flags are being set then add them to z_hints
1889 if (vsecp->vsa_mask & VSA_ACE_ACLFLAGS) {
1890 if (vsecp->vsa_aclflags & ACL_PROTECTED)
1891 aclp->z_hints |= ZFS_ACL_PROTECTED;
1892 if (vsecp->vsa_aclflags & ACL_DEFAULTED)
1893 aclp->z_hints |= ZFS_ACL_DEFAULTED;
1894 if (vsecp->vsa_aclflags & ACL_AUTO_INHERIT)
1895 aclp->z_hints |= ZFS_ACL_AUTO_INHERIT;
1907 zfs_setacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
1909 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1910 zilog_t *zilog = zfsvfs->z_log;
1911 ulong_t mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT);
1915 zfs_fuid_info_t *fuidp = NULL;
1916 boolean_t fuid_dirtied;
1922 if (zp->z_pflags & ZFS_IMMUTABLE)
1925 if ((error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr)))
1928 error = zfs_vsec_2_aclp(zfsvfs, ZTOV(zp)->v_type, vsecp, cr, &fuidp,
1934 * If ACL wide flags aren't being set then preserve any
1937 if (!(vsecp->vsa_mask & VSA_ACE_ACLFLAGS)) {
1939 (zp->z_pflags & V4_ACL_WIDE_FLAGS);
1942 mutex_enter(&zp->z_acl_lock);
1943 mutex_enter(&zp->z_lock);
1945 tx = dmu_tx_create(zfsvfs->z_os);
1947 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
1949 fuid_dirtied = zfsvfs->z_fuid_dirty;
1951 zfs_fuid_txhold(zfsvfs, tx);
1954 * If old version and ACL won't fit in bonus and we aren't
1955 * upgrading then take out necessary DMU holds
1958 if ((acl_obj = zfs_external_acl(zp)) != 0) {
1959 if (zfsvfs->z_version >= ZPL_VERSION_FUID &&
1960 zfs_znode_acl_version(zp) <= ZFS_ACL_VERSION_INITIAL) {
1961 dmu_tx_hold_free(tx, acl_obj, 0,
1963 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
1966 dmu_tx_hold_write(tx, acl_obj, 0, aclp->z_acl_bytes);
1968 } else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) {
1969 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, aclp->z_acl_bytes);
1972 zfs_sa_upgrade_txholds(tx, zp);
1973 error = dmu_tx_assign(tx, TXG_NOWAIT);
1975 mutex_exit(&zp->z_acl_lock);
1976 mutex_exit(&zp->z_lock);
1978 if (error == ERESTART) {
1988 error = zfs_aclset_common(zp, aclp, cr, tx);
1990 ASSERT(zp->z_acl_cached == NULL);
1991 zp->z_acl_cached = aclp;
1994 zfs_fuid_sync(zfsvfs, tx);
1996 zfs_log_acl(zilog, tx, zp, vsecp, fuidp);
1999 zfs_fuid_info_free(fuidp);
2002 mutex_exit(&zp->z_lock);
2003 mutex_exit(&zp->z_acl_lock);
2009 * Check accesses of interest (AoI) against attributes of the dataset
2010 * such as read-only. Returns zero if no AoI conflict with dataset
2011 * attributes, otherwise an appropriate errno is returned.
2014 zfs_zaccess_dataset_check(znode_t *zp, uint32_t v4_mode)
2016 if ((v4_mode & WRITE_MASK) &&
2017 (zp->z_zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) &&
2018 (!IS_DEVVP(ZTOV(zp)) ||
2019 (IS_DEVVP(ZTOV(zp)) && (v4_mode & WRITE_MASK_ATTRS)))) {
2024 * Only check for READONLY on non-directories.
2026 if ((v4_mode & WRITE_MASK_DATA) &&
2027 (((ZTOV(zp)->v_type != VDIR) &&
2028 (zp->z_pflags & (ZFS_READONLY | ZFS_IMMUTABLE))) ||
2029 (ZTOV(zp)->v_type == VDIR &&
2030 (zp->z_pflags & ZFS_IMMUTABLE)))) {
2034 if ((v4_mode & (ACE_DELETE | ACE_DELETE_CHILD)) &&
2035 (zp->z_pflags & ZFS_NOUNLINK)) {
2039 if (((v4_mode & (ACE_READ_DATA|ACE_EXECUTE)) &&
2040 (zp->z_pflags & ZFS_AV_QUARANTINED))) {
2048 * The primary usage of this function is to loop through all of the
2049 * ACEs in the znode, determining what accesses of interest (AoI) to
2050 * the caller are allowed or denied. The AoI are expressed as bits in
2051 * the working_mode parameter. As each ACE is processed, bits covered
2052 * by that ACE are removed from the working_mode. This removal
2053 * facilitates two things. The first is that when the working mode is
2054 * empty (= 0), we know we've looked at all the AoI. The second is
2055 * that the ACE interpretation rules don't allow a later ACE to undo
2056 * something granted or denied by an earlier ACE. Removing the
2057 * discovered access or denial enforces this rule. At the end of
2058 * processing the ACEs, all AoI that were found to be denied are
2059 * placed into the working_mode, giving the caller a mask of denied
2060 * accesses. Returns:
2061 * 0 if all AoI granted
2062 * EACCESS if the denied mask is non-zero
2063 * other error if abnormal failure (e.g., IO error)
2065 * A secondary usage of the function is to determine if any of the
2066 * AoI are granted. If an ACE grants any access in
2067 * the working_mode, we immediately short circuit out of the function.
2068 * This mode is chosen by setting anyaccess to B_TRUE. The
2069 * working_mode is not a denied access mask upon exit if the function
2070 * is used in this manner.
2073 zfs_zaccess_aces_check(znode_t *zp, uint32_t *working_mode,
2074 boolean_t anyaccess, cred_t *cr)
2076 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2079 uid_t uid = crgetuid(cr);
2081 uint16_t type, iflags;
2082 uint16_t entry_type;
2083 uint32_t access_mask;
2084 uint32_t deny_mask = 0;
2085 zfs_ace_hdr_t *acep = NULL;
2090 zfs_fuid_map_ids(zp, cr, &fowner, &gowner);
2092 mutex_enter(&zp->z_acl_lock);
2094 error = zfs_acl_node_read(zp, B_FALSE, &aclp, B_FALSE);
2096 mutex_exit(&zp->z_acl_lock);
2100 ASSERT(zp->z_acl_cached);
2102 while ((acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
2104 uint32_t mask_matched;
2106 if (!zfs_acl_valid_ace_type(type, iflags))
2109 if (ZTOV(zp)->v_type == VDIR && (iflags & ACE_INHERIT_ONLY_ACE))
2112 /* Skip ACE if it does not affect any AoI */
2113 mask_matched = (access_mask & *working_mode);
2117 entry_type = (iflags & ACE_TYPE_FLAGS);
2121 switch (entry_type) {
2129 case ACE_IDENTIFIER_GROUP:
2130 checkit = zfs_groupmember(zfsvfs, who, cr);
2138 if (entry_type == 0) {
2141 newid = zfs_fuid_map_id(zfsvfs, who, cr,
2143 if (newid != IDMAP_WK_CREATOR_OWNER_UID &&
2148 mutex_exit(&zp->z_acl_lock);
2155 DTRACE_PROBE3(zfs__ace__denies,
2157 zfs_ace_hdr_t *, acep,
2158 uint32_t, mask_matched);
2159 deny_mask |= mask_matched;
2161 DTRACE_PROBE3(zfs__ace__allows,
2163 zfs_ace_hdr_t *, acep,
2164 uint32_t, mask_matched);
2166 mutex_exit(&zp->z_acl_lock);
2170 *working_mode &= ~mask_matched;
2174 if (*working_mode == 0)
2178 mutex_exit(&zp->z_acl_lock);
2180 /* Put the found 'denies' back on the working mode */
2182 *working_mode |= deny_mask;
2184 } else if (*working_mode) {
2192 * Return true if any access whatsoever granted, we don't actually
2193 * care what access is granted.
2196 zfs_has_access(znode_t *zp, cred_t *cr)
2198 uint32_t have = ACE_ALL_PERMS;
2200 if (zfs_zaccess_aces_check(zp, &have, B_TRUE, cr) != 0) {
2203 owner = zfs_fuid_map_id(zp->z_zfsvfs, zp->z_uid, cr, ZFS_OWNER);
2204 return (secpolicy_vnode_any_access(cr, ZTOV(zp), owner) == 0);
2210 zfs_zaccess_common(znode_t *zp, uint32_t v4_mode, uint32_t *working_mode,
2211 boolean_t *check_privs, boolean_t skipaclchk, cred_t *cr)
2213 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2216 *working_mode = v4_mode;
2217 *check_privs = B_TRUE;
2220 * Short circuit empty requests
2222 if (v4_mode == 0 || zfsvfs->z_replay) {
2227 if ((err = zfs_zaccess_dataset_check(zp, v4_mode)) != 0) {
2228 *check_privs = B_FALSE;
2233 * The caller requested that the ACL check be skipped. This
2234 * would only happen if the caller checked VOP_ACCESS() with a
2235 * 32 bit ACE mask and already had the appropriate permissions.
2242 return (zfs_zaccess_aces_check(zp, working_mode, B_FALSE, cr));
2246 zfs_zaccess_append(znode_t *zp, uint32_t *working_mode, boolean_t *check_privs,
2249 if (*working_mode != ACE_WRITE_DATA)
2252 return (zfs_zaccess_common(zp, ACE_APPEND_DATA, working_mode,
2253 check_privs, B_FALSE, cr));
2257 zfs_fastaccesschk_execute(znode_t *zdp, cred_t *cr)
2259 boolean_t owner = B_FALSE;
2260 boolean_t groupmbr = B_FALSE;
2262 uid_t uid = crgetuid(cr);
2265 if (zdp->z_pflags & ZFS_AV_QUARANTINED)
2268 is_attr = ((zdp->z_pflags & ZFS_XATTR) &&
2269 (ZTOV(zdp)->v_type == VDIR));
2274 mutex_enter(&zdp->z_acl_lock);
2276 if (zdp->z_pflags & ZFS_NO_EXECS_DENIED) {
2277 mutex_exit(&zdp->z_acl_lock);
2281 if (FUID_INDEX(zdp->z_uid) != 0 || FUID_INDEX(zdp->z_gid) != 0) {
2282 mutex_exit(&zdp->z_acl_lock);
2286 if (uid == zdp->z_uid) {
2288 if (zdp->z_mode & S_IXUSR) {
2289 mutex_exit(&zdp->z_acl_lock);
2292 mutex_exit(&zdp->z_acl_lock);
2296 if (groupmember(zdp->z_gid, cr)) {
2298 if (zdp->z_mode & S_IXGRP) {
2299 mutex_exit(&zdp->z_acl_lock);
2302 mutex_exit(&zdp->z_acl_lock);
2306 if (!owner && !groupmbr) {
2307 if (zdp->z_mode & S_IXOTH) {
2308 mutex_exit(&zdp->z_acl_lock);
2313 mutex_exit(&zdp->z_acl_lock);
2316 DTRACE_PROBE(zfs__fastpath__execute__access__miss);
2317 ZFS_ENTER(zdp->z_zfsvfs);
2318 error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr);
2319 ZFS_EXIT(zdp->z_zfsvfs);
2324 * Determine whether Access should be granted/denied.
2325 * The least priv subsytem is always consulted as a basic privilege
2326 * can define any form of access.
2329 zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr)
2331 uint32_t working_mode;
2334 boolean_t check_privs;
2336 znode_t *check_zp = zp;
2340 is_attr = ((zp->z_pflags & ZFS_XATTR) && (ZTOV(zp)->v_type == VDIR));
2343 * If attribute then validate against base file
2348 if ((error = sa_lookup(zp->z_sa_hdl,
2349 SA_ZPL_PARENT(zp->z_zfsvfs), &parent,
2350 sizeof (parent))) != 0)
2353 if ((error = zfs_zget(zp->z_zfsvfs,
2354 parent, &xzp)) != 0) {
2361 * fixup mode to map to xattr perms
2364 if (mode & (ACE_WRITE_DATA|ACE_APPEND_DATA)) {
2365 mode &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
2366 mode |= ACE_WRITE_NAMED_ATTRS;
2369 if (mode & (ACE_READ_DATA|ACE_EXECUTE)) {
2370 mode &= ~(ACE_READ_DATA|ACE_EXECUTE);
2371 mode |= ACE_READ_NAMED_ATTRS;
2375 owner = zfs_fuid_map_id(zp->z_zfsvfs, zp->z_uid, cr, ZFS_OWNER);
2377 * Map the bits required to the standard vnode flags VREAD|VWRITE|VEXEC
2378 * in needed_bits. Map the bits mapped by working_mode (currently
2379 * missing) in missing_bits.
2380 * Call secpolicy_vnode_access2() with (needed_bits & ~checkmode),
2385 working_mode = mode;
2386 if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES)) &&
2387 owner == crgetuid(cr))
2388 working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES);
2390 if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS|
2391 ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE))
2392 needed_bits |= VREAD;
2393 if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
2394 ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
2395 needed_bits |= VWRITE;
2396 if (working_mode & ACE_EXECUTE)
2397 needed_bits |= VEXEC;
2399 if ((error = zfs_zaccess_common(check_zp, mode, &working_mode,
2400 &check_privs, skipaclchk, cr)) == 0) {
2403 return (secpolicy_vnode_access2(cr, ZTOV(zp), owner,
2404 needed_bits, needed_bits));
2407 if (error && !check_privs) {
2413 if (error && (flags & V_APPEND)) {
2414 error = zfs_zaccess_append(zp, &working_mode, &check_privs, cr);
2417 if (error && check_privs) {
2418 mode_t checkmode = 0;
2421 * First check for implicit owner permission on
2422 * read_acl/read_attributes
2426 ASSERT(working_mode != 0);
2428 if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES) &&
2429 owner == crgetuid(cr)))
2430 working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES);
2432 if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS|
2433 ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE))
2435 if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
2436 ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
2437 checkmode |= VWRITE;
2438 if (working_mode & ACE_EXECUTE)
2441 error = secpolicy_vnode_access2(cr, ZTOV(check_zp), owner,
2442 needed_bits & ~checkmode, needed_bits);
2444 if (error == 0 && (working_mode & ACE_WRITE_OWNER))
2445 error = secpolicy_vnode_chown(cr, owner);
2446 if (error == 0 && (working_mode & ACE_WRITE_ACL))
2447 error = secpolicy_vnode_setdac(cr, owner);
2449 if (error == 0 && (working_mode &
2450 (ACE_DELETE|ACE_DELETE_CHILD)))
2451 error = secpolicy_vnode_remove(cr);
2453 if (error == 0 && (working_mode & ACE_SYNCHRONIZE)) {
2454 error = secpolicy_vnode_chown(cr, owner);
2458 * See if any bits other than those already checked
2459 * for are still present. If so then return EACCES
2461 if (working_mode & ~(ZFS_CHECKED_MASKS)) {
2465 } else if (error == 0) {
2466 error = secpolicy_vnode_access2(cr, ZTOV(zp), owner,
2467 needed_bits, needed_bits);
2478 * Translate traditional unix VREAD/VWRITE/VEXEC mode into
2479 * native ACL format and call zfs_zaccess()
2482 zfs_zaccess_rwx(znode_t *zp, mode_t mode, int flags, cred_t *cr)
2484 return (zfs_zaccess(zp, zfs_unix_to_v4(mode >> 6), flags, B_FALSE, cr));
2488 * Access function for secpolicy_vnode_setattr
2491 zfs_zaccess_unix(znode_t *zp, mode_t mode, cred_t *cr)
2493 int v4_mode = zfs_unix_to_v4(mode >> 6);
2495 return (zfs_zaccess(zp, v4_mode, 0, B_FALSE, cr));
2499 zfs_delete_final_check(znode_t *zp, znode_t *dzp,
2500 mode_t available_perms, cred_t *cr)
2505 downer = zfs_fuid_map_id(dzp->z_zfsvfs, dzp->z_uid, cr, ZFS_OWNER);
2507 error = secpolicy_vnode_access2(cr, ZTOV(dzp),
2508 downer, available_perms, VWRITE|VEXEC);
2511 error = zfs_sticky_remove_access(dzp, zp, cr);
2517 * Determine whether Access should be granted/deny, without
2518 * consulting least priv subsystem.
2521 * The following chart is the recommended NFSv4 enforcement for
2522 * ability to delete an object.
2524 * -------------------------------------------------------
2525 * | Parent Dir | Target Object Permissions |
2527 * -------------------------------------------------------
2528 * | | ACL Allows | ACL Denies| Delete |
2529 * | | Delete | Delete | unspecified|
2530 * -------------------------------------------------------
2531 * | ACL Allows | Permit | Permit | Permit |
2532 * | DELETE_CHILD | |
2533 * -------------------------------------------------------
2534 * | ACL Denies | Permit | Deny | Deny |
2535 * | DELETE_CHILD | | | |
2536 * -------------------------------------------------------
2537 * | ACL specifies | | | |
2538 * | only allow | Permit | Permit | Permit |
2539 * | write and | | | |
2541 * -------------------------------------------------------
2542 * | ACL denies | | | |
2543 * | write and | Permit | Deny | Deny |
2545 * -------------------------------------------------------
2548 * No search privilege, can't even look up file?
2552 zfs_zaccess_delete(znode_t *dzp, znode_t *zp, cred_t *cr)
2554 uint32_t dzp_working_mode = 0;
2555 uint32_t zp_working_mode = 0;
2556 int dzp_error, zp_error;
2557 mode_t available_perms;
2558 boolean_t dzpcheck_privs = B_TRUE;
2559 boolean_t zpcheck_privs = B_TRUE;
2562 * We want specific DELETE permissions to
2563 * take precedence over WRITE/EXECUTE. We don't
2564 * want an ACL such as this to mess us up.
2565 * user:joe:write_data:deny,user:joe:delete:allow
2567 * However, deny permissions may ultimately be overridden
2568 * by secpolicy_vnode_access().
2570 * We will ask for all of the necessary permissions and then
2571 * look at the working modes from the directory and target object
2572 * to determine what was found.
2575 if (zp->z_pflags & (ZFS_IMMUTABLE | ZFS_NOUNLINK))
2580 * If the directory permissions allow the delete, we are done.
2582 if ((dzp_error = zfs_zaccess_common(dzp, ACE_DELETE_CHILD,
2583 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0)
2587 * If target object has delete permission then we are done
2589 if ((zp_error = zfs_zaccess_common(zp, ACE_DELETE, &zp_working_mode,
2590 &zpcheck_privs, B_FALSE, cr)) == 0)
2593 ASSERT(dzp_error && zp_error);
2595 if (!dzpcheck_privs)
2603 * If directory returns EACCES then delete_child was denied
2604 * due to deny delete_child. In this case send the request through
2605 * secpolicy_vnode_remove(). We don't use zfs_delete_final_check()
2606 * since that *could* allow the delete based on write/execute permission
2607 * and we want delete permissions to override write/execute.
2610 if (dzp_error == EACCES)
2611 return (secpolicy_vnode_remove(cr));
2615 * only need to see if we have write/execute on directory.
2618 dzp_error = zfs_zaccess_common(dzp, ACE_EXECUTE|ACE_WRITE_DATA,
2619 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr);
2621 if (dzp_error != 0 && !dzpcheck_privs)
2628 available_perms = (dzp_working_mode & ACE_WRITE_DATA) ? 0 : VWRITE;
2629 available_perms |= (dzp_working_mode & ACE_EXECUTE) ? 0 : VEXEC;
2631 return (zfs_delete_final_check(zp, dzp, available_perms, cr));
2636 zfs_zaccess_rename(znode_t *sdzp, znode_t *szp, znode_t *tdzp,
2637 znode_t *tzp, cred_t *cr)
2642 if (szp->z_pflags & ZFS_AV_QUARANTINED)
2645 add_perm = (ZTOV(szp)->v_type == VDIR) ?
2646 ACE_ADD_SUBDIRECTORY : ACE_ADD_FILE;
2649 * Rename permissions are combination of delete permission +
2650 * add file/subdir permission.
2654 * first make sure we do the delete portion.
2656 * If that succeeds then check for add_file/add_subdir permissions
2659 if ((error = zfs_zaccess_delete(sdzp, szp, cr)))
2663 * If we have a tzp, see if we can delete it?
2666 if ((error = zfs_zaccess_delete(tdzp, tzp, cr)))
2671 * Now check for add permissions
2673 error = zfs_zaccess(tdzp, add_perm, 0, B_FALSE, cr);
2678 #endif /* HAVE_ZPL */