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.
25 #include <sys/types.h>
26 #include <sys/param.h>
28 #include <sys/systm.h>
29 #include <sys/sysmacros.h>
30 #include <sys/resource.h>
32 #include <sys/vnode.h>
37 #include <sys/cmn_err.h>
38 #include <sys/errno.h>
39 #include <sys/unistd.h>
41 #include <sys/fs/zfs.h>
43 #include <sys/policy.h>
44 #include <sys/zfs_znode.h>
45 #include <sys/zfs_fuid.h>
46 #include <sys/zfs_acl.h>
47 #include <sys/zfs_dir.h>
48 #include <sys/zfs_vfsops.h>
50 #include <sys/dnode.h>
53 #include "fs/fs_subr.h"
54 #include <acl/acl_common.h>
56 #define ALLOW ACE_ACCESS_ALLOWED_ACE_TYPE
57 #define DENY ACE_ACCESS_DENIED_ACE_TYPE
58 #define MAX_ACE_TYPE ACE_SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE
59 #define MIN_ACE_TYPE ALLOW
61 #define OWNING_GROUP (ACE_GROUP|ACE_IDENTIFIER_GROUP)
62 #define EVERYONE_ALLOW_MASK (ACE_READ_ACL|ACE_READ_ATTRIBUTES | \
63 ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE)
64 #define EVERYONE_DENY_MASK (ACE_WRITE_ACL|ACE_WRITE_OWNER | \
65 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
66 #define OWNER_ALLOW_MASK (ACE_WRITE_ACL | ACE_WRITE_OWNER | \
67 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
69 #define ZFS_CHECKED_MASKS (ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_READ_DATA| \
70 ACE_READ_NAMED_ATTRS|ACE_WRITE_DATA|ACE_WRITE_ATTRIBUTES| \
71 ACE_WRITE_NAMED_ATTRS|ACE_APPEND_DATA|ACE_EXECUTE|ACE_WRITE_OWNER| \
72 ACE_WRITE_ACL|ACE_DELETE|ACE_DELETE_CHILD|ACE_SYNCHRONIZE)
74 #define WRITE_MASK_DATA (ACE_WRITE_DATA|ACE_APPEND_DATA|ACE_WRITE_NAMED_ATTRS)
75 #define WRITE_MASK_ATTRS (ACE_WRITE_ACL|ACE_WRITE_OWNER|ACE_WRITE_ATTRIBUTES| \
76 ACE_DELETE|ACE_DELETE_CHILD)
77 #define WRITE_MASK (WRITE_MASK_DATA|WRITE_MASK_ATTRS)
79 #define OGE_CLEAR (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
80 ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
82 #define OKAY_MASK_BITS (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
83 ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
85 #define ALL_INHERIT (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE | \
86 ACE_NO_PROPAGATE_INHERIT_ACE|ACE_INHERIT_ONLY_ACE|ACE_INHERITED_ACE)
88 #define RESTRICTED_CLEAR (ACE_WRITE_ACL|ACE_WRITE_OWNER)
90 #define V4_ACL_WIDE_FLAGS (ZFS_ACL_AUTO_INHERIT|ZFS_ACL_DEFAULTED|\
93 #define ZFS_ACL_WIDE_FLAGS (V4_ACL_WIDE_FLAGS|ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|\
96 #define ALL_MODE_EXECS (S_IXUSR | S_IXGRP | S_IXOTH)
99 zfs_ace_v0_get_type(void *acep)
101 return (((zfs_oldace_t *)acep)->z_type);
105 zfs_ace_v0_get_flags(void *acep)
107 return (((zfs_oldace_t *)acep)->z_flags);
111 zfs_ace_v0_get_mask(void *acep)
113 return (((zfs_oldace_t *)acep)->z_access_mask);
117 zfs_ace_v0_get_who(void *acep)
119 return (((zfs_oldace_t *)acep)->z_fuid);
123 zfs_ace_v0_set_type(void *acep, uint16_t type)
125 ((zfs_oldace_t *)acep)->z_type = type;
129 zfs_ace_v0_set_flags(void *acep, uint16_t flags)
131 ((zfs_oldace_t *)acep)->z_flags = flags;
135 zfs_ace_v0_set_mask(void *acep, uint32_t mask)
137 ((zfs_oldace_t *)acep)->z_access_mask = mask;
141 zfs_ace_v0_set_who(void *acep, uint64_t who)
143 ((zfs_oldace_t *)acep)->z_fuid = who;
148 zfs_ace_v0_size(void *acep)
150 return (sizeof (zfs_oldace_t));
154 zfs_ace_v0_abstract_size(void)
156 return (sizeof (zfs_oldace_t));
160 zfs_ace_v0_mask_off(void)
162 return (offsetof(zfs_oldace_t, z_access_mask));
167 zfs_ace_v0_data(void *acep, void **datap)
173 static acl_ops_t zfs_acl_v0_ops = {
176 zfs_ace_v0_get_flags,
177 zfs_ace_v0_set_flags,
183 zfs_ace_v0_abstract_size,
189 zfs_ace_fuid_get_type(void *acep)
191 return (((zfs_ace_hdr_t *)acep)->z_type);
195 zfs_ace_fuid_get_flags(void *acep)
197 return (((zfs_ace_hdr_t *)acep)->z_flags);
201 zfs_ace_fuid_get_mask(void *acep)
203 return (((zfs_ace_hdr_t *)acep)->z_access_mask);
207 zfs_ace_fuid_get_who(void *args)
210 zfs_ace_t *acep = args;
212 entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
214 if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
215 entry_type == ACE_EVERYONE)
217 return (((zfs_ace_t *)acep)->z_fuid);
221 zfs_ace_fuid_set_type(void *acep, uint16_t type)
223 ((zfs_ace_hdr_t *)acep)->z_type = type;
227 zfs_ace_fuid_set_flags(void *acep, uint16_t flags)
229 ((zfs_ace_hdr_t *)acep)->z_flags = flags;
233 zfs_ace_fuid_set_mask(void *acep, uint32_t mask)
235 ((zfs_ace_hdr_t *)acep)->z_access_mask = mask;
239 zfs_ace_fuid_set_who(void *arg, uint64_t who)
241 zfs_ace_t *acep = arg;
243 uint16_t entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
245 if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
246 entry_type == ACE_EVERYONE)
252 zfs_ace_fuid_size(void *acep)
254 zfs_ace_hdr_t *zacep = acep;
257 switch (zacep->z_type) {
258 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
259 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
260 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
261 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
262 return (sizeof (zfs_object_ace_t));
266 (((zfs_ace_hdr_t *)acep)->z_flags & ACE_TYPE_FLAGS);
267 if (entry_type == ACE_OWNER ||
268 entry_type == OWNING_GROUP ||
269 entry_type == ACE_EVERYONE)
270 return (sizeof (zfs_ace_hdr_t));
273 return (sizeof (zfs_ace_t));
278 zfs_ace_fuid_abstract_size(void)
280 return (sizeof (zfs_ace_hdr_t));
284 zfs_ace_fuid_mask_off(void)
286 return (offsetof(zfs_ace_hdr_t, z_access_mask));
290 zfs_ace_fuid_data(void *acep, void **datap)
292 zfs_ace_t *zacep = acep;
293 zfs_object_ace_t *zobjp;
295 switch (zacep->z_hdr.z_type) {
296 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
297 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
298 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
299 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
301 *datap = (caddr_t)zobjp + sizeof (zfs_ace_t);
302 return (sizeof (zfs_object_ace_t) - sizeof (zfs_ace_t));
309 static acl_ops_t zfs_acl_fuid_ops = {
310 zfs_ace_fuid_get_mask,
311 zfs_ace_fuid_set_mask,
312 zfs_ace_fuid_get_flags,
313 zfs_ace_fuid_set_flags,
314 zfs_ace_fuid_get_type,
315 zfs_ace_fuid_set_type,
316 zfs_ace_fuid_get_who,
317 zfs_ace_fuid_set_who,
319 zfs_ace_fuid_abstract_size,
320 zfs_ace_fuid_mask_off,
325 * The following three functions are provided for compatibility with
326 * older ZPL version in order to determine if the file use to have
327 * an external ACL and what version of ACL previously existed on the
328 * file. Would really be nice to not need this, sigh.
332 zfs_external_acl(znode_t *zp)
334 zfs_acl_phys_t acl_phys;
339 VERIFY(0 == sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zp->z_zfsvfs),
340 &acl_phys, sizeof (acl_phys)));
342 return (acl_phys.z_acl_extern_obj);
346 * Determine size of ACL in bytes
348 * This is more complicated than it should be since we have to deal
349 * with old external ACLs.
352 zfs_acl_znode_info(znode_t *zp, int *aclsize, int *aclcount,
353 zfs_acl_phys_t *aclphys)
355 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
361 if ((error = sa_size(zp->z_sa_hdl, SA_ZPL_DACL_ACES(zfsvfs),
365 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DACL_COUNT(zfsvfs),
366 &acl_count, sizeof (acl_count))) != 0)
368 *aclcount = acl_count;
370 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zfsvfs),
371 aclphys, sizeof (*aclphys))) != 0)
374 if (aclphys->z_acl_version == ZFS_ACL_VERSION_INITIAL) {
375 *aclsize = ZFS_ACL_SIZE(aclphys->z_acl_size);
376 *aclcount = aclphys->z_acl_size;
378 *aclsize = aclphys->z_acl_size;
379 *aclcount = aclphys->z_acl_count;
386 zfs_znode_acl_version(znode_t *zp)
388 zfs_acl_phys_t acl_phys;
391 return (ZFS_ACL_VERSION_FUID);
393 VERIFY(0 == sa_lookup(zp->z_sa_hdl,
394 SA_ZPL_ZNODE_ACL(zp->z_zfsvfs),
395 &acl_phys, sizeof (acl_phys)));
396 return (acl_phys.z_acl_version);
401 zfs_acl_version(int version)
403 if (version < ZPL_VERSION_FUID)
404 return (ZFS_ACL_VERSION_INITIAL);
406 return (ZFS_ACL_VERSION_FUID);
410 zfs_acl_version_zp(znode_t *zp)
412 return (zfs_acl_version(zp->z_zfsvfs->z_version));
416 zfs_acl_alloc(int vers)
420 aclp = kmem_zalloc(sizeof (zfs_acl_t), KM_SLEEP);
421 list_create(&aclp->z_acl, sizeof (zfs_acl_node_t),
422 offsetof(zfs_acl_node_t, z_next));
423 aclp->z_version = vers;
424 if (vers == ZFS_ACL_VERSION_FUID)
425 aclp->z_ops = zfs_acl_fuid_ops;
427 aclp->z_ops = zfs_acl_v0_ops;
432 zfs_acl_node_alloc(size_t bytes)
434 zfs_acl_node_t *aclnode;
436 aclnode = kmem_zalloc(sizeof (zfs_acl_node_t), KM_SLEEP);
438 aclnode->z_acldata = kmem_alloc(bytes, KM_SLEEP);
439 aclnode->z_allocdata = aclnode->z_acldata;
440 aclnode->z_allocsize = bytes;
441 aclnode->z_size = bytes;
448 zfs_acl_node_free(zfs_acl_node_t *aclnode)
450 if (aclnode->z_allocsize)
451 kmem_free(aclnode->z_allocdata, aclnode->z_allocsize);
452 kmem_free(aclnode, sizeof (zfs_acl_node_t));
456 zfs_acl_release_nodes(zfs_acl_t *aclp)
458 zfs_acl_node_t *aclnode;
460 while (aclnode = list_head(&aclp->z_acl)) {
461 list_remove(&aclp->z_acl, aclnode);
462 zfs_acl_node_free(aclnode);
464 aclp->z_acl_count = 0;
465 aclp->z_acl_bytes = 0;
469 zfs_acl_free(zfs_acl_t *aclp)
471 zfs_acl_release_nodes(aclp);
472 list_destroy(&aclp->z_acl);
473 kmem_free(aclp, sizeof (zfs_acl_t));
477 zfs_acl_valid_ace_type(uint_t type, uint_t flags)
484 case ACE_SYSTEM_AUDIT_ACE_TYPE:
485 case ACE_SYSTEM_ALARM_ACE_TYPE:
486 entry_type = flags & ACE_TYPE_FLAGS;
487 return (entry_type == ACE_OWNER ||
488 entry_type == OWNING_GROUP ||
489 entry_type == ACE_EVERYONE || entry_type == 0 ||
490 entry_type == ACE_IDENTIFIER_GROUP);
492 if (type >= MIN_ACE_TYPE && type <= MAX_ACE_TYPE)
499 zfs_ace_valid(vtype_t obj_type, zfs_acl_t *aclp, uint16_t type, uint16_t iflags)
502 * first check type of entry
505 if (!zfs_acl_valid_ace_type(type, iflags))
509 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
510 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
511 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
512 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
513 if (aclp->z_version < ZFS_ACL_VERSION_FUID)
515 aclp->z_hints |= ZFS_ACL_OBJ_ACE;
519 * next check inheritance level flags
522 if (obj_type == VDIR &&
523 (iflags & (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE)))
524 aclp->z_hints |= ZFS_INHERIT_ACE;
526 if (iflags & (ACE_INHERIT_ONLY_ACE|ACE_NO_PROPAGATE_INHERIT_ACE)) {
527 if ((iflags & (ACE_FILE_INHERIT_ACE|
528 ACE_DIRECTORY_INHERIT_ACE)) == 0) {
537 zfs_acl_next_ace(zfs_acl_t *aclp, void *start, uint64_t *who,
538 uint32_t *access_mask, uint16_t *iflags, uint16_t *type)
540 zfs_acl_node_t *aclnode;
545 aclnode = list_head(&aclp->z_acl);
549 aclp->z_next_ace = aclnode->z_acldata;
550 aclp->z_curr_node = aclnode;
551 aclnode->z_ace_idx = 0;
554 aclnode = aclp->z_curr_node;
559 if (aclnode->z_ace_idx >= aclnode->z_ace_count) {
560 aclnode = list_next(&aclp->z_acl, aclnode);
564 aclp->z_curr_node = aclnode;
565 aclnode->z_ace_idx = 0;
566 aclp->z_next_ace = aclnode->z_acldata;
570 if (aclnode->z_ace_idx < aclnode->z_ace_count) {
571 void *acep = aclp->z_next_ace;
575 * Make sure we don't overstep our bounds
577 ace_size = aclp->z_ops.ace_size(acep);
579 if (((caddr_t)acep + ace_size) >
580 ((caddr_t)aclnode->z_acldata + aclnode->z_size)) {
584 *iflags = aclp->z_ops.ace_flags_get(acep);
585 *type = aclp->z_ops.ace_type_get(acep);
586 *access_mask = aclp->z_ops.ace_mask_get(acep);
587 *who = aclp->z_ops.ace_who_get(acep);
588 aclp->z_next_ace = (caddr_t)aclp->z_next_ace + ace_size;
589 aclnode->z_ace_idx++;
591 return ((void *)acep);
598 zfs_ace_walk(void *datap, uint64_t cookie, int aclcnt,
599 uint16_t *flags, uint16_t *type, uint32_t *mask)
601 zfs_acl_t *aclp = datap;
602 zfs_ace_hdr_t *acep = (zfs_ace_hdr_t *)(uintptr_t)cookie;
605 acep = zfs_acl_next_ace(aclp, acep, &who, mask,
607 return ((uint64_t)(uintptr_t)acep);
610 static zfs_acl_node_t *
611 zfs_acl_curr_node(zfs_acl_t *aclp)
613 ASSERT(aclp->z_curr_node);
614 return (aclp->z_curr_node);
618 * Copy ACE to internal ZFS format.
619 * While processing the ACL each ACE will be validated for correctness.
620 * ACE FUIDs will be created later.
623 zfs_copy_ace_2_fuid(zfsvfs_t *zfsvfs, vtype_t obj_type, zfs_acl_t *aclp,
624 void *datap, zfs_ace_t *z_acl, uint64_t aclcnt, size_t *size,
625 zfs_fuid_info_t **fuidp, cred_t *cr)
629 zfs_ace_t *aceptr = z_acl;
631 zfs_object_ace_t *zobjacep;
632 ace_object_t *aceobjp;
634 for (i = 0; i != aclcnt; i++) {
635 aceptr->z_hdr.z_access_mask = acep->a_access_mask;
636 aceptr->z_hdr.z_flags = acep->a_flags;
637 aceptr->z_hdr.z_type = acep->a_type;
638 entry_type = aceptr->z_hdr.z_flags & ACE_TYPE_FLAGS;
639 if (entry_type != ACE_OWNER && entry_type != OWNING_GROUP &&
640 entry_type != ACE_EVERYONE) {
641 aceptr->z_fuid = zfs_fuid_create(zfsvfs, acep->a_who,
642 cr, (entry_type == 0) ?
643 ZFS_ACE_USER : ZFS_ACE_GROUP, fuidp);
647 * Make sure ACE is valid
649 if (zfs_ace_valid(obj_type, aclp, aceptr->z_hdr.z_type,
650 aceptr->z_hdr.z_flags) != B_TRUE)
653 switch (acep->a_type) {
654 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
655 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
656 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
657 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
658 zobjacep = (zfs_object_ace_t *)aceptr;
659 aceobjp = (ace_object_t *)acep;
661 bcopy(aceobjp->a_obj_type, zobjacep->z_object_type,
662 sizeof (aceobjp->a_obj_type));
663 bcopy(aceobjp->a_inherit_obj_type,
664 zobjacep->z_inherit_type,
665 sizeof (aceobjp->a_inherit_obj_type));
666 acep = (ace_t *)((caddr_t)acep + sizeof (ace_object_t));
669 acep = (ace_t *)((caddr_t)acep + sizeof (ace_t));
672 aceptr = (zfs_ace_t *)((caddr_t)aceptr +
673 aclp->z_ops.ace_size(aceptr));
676 *size = (caddr_t)aceptr - (caddr_t)z_acl;
682 * Copy ZFS ACEs to fixed size ace_t layout
685 zfs_copy_fuid_2_ace(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, cred_t *cr,
686 void *datap, int filter)
689 uint32_t access_mask;
690 uint16_t iflags, type;
691 zfs_ace_hdr_t *zacep = NULL;
693 ace_object_t *objacep;
694 zfs_object_ace_t *zobjacep;
698 while (zacep = zfs_acl_next_ace(aclp, zacep,
699 &who, &access_mask, &iflags, &type)) {
702 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
703 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
704 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
705 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
709 zobjacep = (zfs_object_ace_t *)zacep;
710 objacep = (ace_object_t *)acep;
711 bcopy(zobjacep->z_object_type,
713 sizeof (zobjacep->z_object_type));
714 bcopy(zobjacep->z_inherit_type,
715 objacep->a_inherit_obj_type,
716 sizeof (zobjacep->z_inherit_type));
717 ace_size = sizeof (ace_object_t);
720 ace_size = sizeof (ace_t);
724 entry_type = (iflags & ACE_TYPE_FLAGS);
725 if ((entry_type != ACE_OWNER &&
726 entry_type != OWNING_GROUP &&
727 entry_type != ACE_EVERYONE)) {
728 acep->a_who = zfs_fuid_map_id(zfsvfs, who,
729 cr, (entry_type & ACE_IDENTIFIER_GROUP) ?
730 ZFS_ACE_GROUP : ZFS_ACE_USER);
732 acep->a_who = (uid_t)(int64_t)who;
734 acep->a_access_mask = access_mask;
735 acep->a_flags = iflags;
737 acep = (ace_t *)((caddr_t)acep + ace_size);
742 zfs_copy_ace_2_oldace(vtype_t obj_type, zfs_acl_t *aclp, ace_t *acep,
743 zfs_oldace_t *z_acl, int aclcnt, size_t *size)
746 zfs_oldace_t *aceptr = z_acl;
748 for (i = 0; i != aclcnt; i++, aceptr++) {
749 aceptr->z_access_mask = acep[i].a_access_mask;
750 aceptr->z_type = acep[i].a_type;
751 aceptr->z_flags = acep[i].a_flags;
752 aceptr->z_fuid = acep[i].a_who;
754 * Make sure ACE is valid
756 if (zfs_ace_valid(obj_type, aclp, aceptr->z_type,
757 aceptr->z_flags) != B_TRUE)
760 *size = (caddr_t)aceptr - (caddr_t)z_acl;
765 * convert old ACL format to new
768 zfs_acl_xform(znode_t *zp, zfs_acl_t *aclp, cred_t *cr)
770 zfs_oldace_t *oldaclp;
772 uint16_t type, iflags;
773 uint32_t access_mask;
776 zfs_acl_node_t *newaclnode;
778 ASSERT(aclp->z_version == ZFS_ACL_VERSION_INITIAL);
780 * First create the ACE in a contiguous piece of memory
781 * for zfs_copy_ace_2_fuid().
783 * We only convert an ACL once, so this won't happen
786 oldaclp = kmem_alloc(sizeof (zfs_oldace_t) * aclp->z_acl_count,
789 while (cookie = zfs_acl_next_ace(aclp, cookie, &who,
790 &access_mask, &iflags, &type)) {
791 oldaclp[i].z_flags = iflags;
792 oldaclp[i].z_type = type;
793 oldaclp[i].z_fuid = who;
794 oldaclp[i++].z_access_mask = access_mask;
797 newaclnode = zfs_acl_node_alloc(aclp->z_acl_count *
798 sizeof (zfs_object_ace_t));
799 aclp->z_ops = zfs_acl_fuid_ops;
800 VERIFY(zfs_copy_ace_2_fuid(zp->z_zfsvfs, ZTOV(zp)->v_type, aclp,
801 oldaclp, newaclnode->z_acldata, aclp->z_acl_count,
802 &newaclnode->z_size, NULL, cr) == 0);
803 newaclnode->z_ace_count = aclp->z_acl_count;
804 aclp->z_version = ZFS_ACL_VERSION;
805 kmem_free(oldaclp, aclp->z_acl_count * sizeof (zfs_oldace_t));
808 * Release all previous ACL nodes
811 zfs_acl_release_nodes(aclp);
813 list_insert_head(&aclp->z_acl, newaclnode);
815 aclp->z_acl_bytes = newaclnode->z_size;
816 aclp->z_acl_count = newaclnode->z_ace_count;
821 * Convert unix access mask to v4 access mask
824 zfs_unix_to_v4(uint32_t access_mask)
826 uint32_t new_mask = 0;
828 if (access_mask & S_IXOTH)
829 new_mask |= ACE_EXECUTE;
830 if (access_mask & S_IWOTH)
831 new_mask |= ACE_WRITE_DATA;
832 if (access_mask & S_IROTH)
833 new_mask |= ACE_READ_DATA;
838 zfs_set_ace(zfs_acl_t *aclp, void *acep, uint32_t access_mask,
839 uint16_t access_type, uint64_t fuid, uint16_t entry_type)
841 uint16_t type = entry_type & ACE_TYPE_FLAGS;
843 aclp->z_ops.ace_mask_set(acep, access_mask);
844 aclp->z_ops.ace_type_set(acep, access_type);
845 aclp->z_ops.ace_flags_set(acep, entry_type);
846 if ((type != ACE_OWNER && type != OWNING_GROUP &&
847 type != ACE_EVERYONE))
848 aclp->z_ops.ace_who_set(acep, fuid);
852 * Determine mode of file based on ACL.
853 * Also, create FUIDs for any User/Group ACEs
856 zfs_mode_compute(uint64_t fmode, zfs_acl_t *aclp,
857 uint64_t *pflags, uint64_t fuid, uint64_t fgid)
862 zfs_ace_hdr_t *acep = NULL;
864 uint16_t iflags, type;
865 uint32_t access_mask;
866 boolean_t an_exec_denied = B_FALSE;
868 mode = (fmode & (S_IFMT | S_ISUID | S_ISGID | S_ISVTX));
870 while (acep = zfs_acl_next_ace(aclp, acep, &who,
871 &access_mask, &iflags, &type)) {
873 if (!zfs_acl_valid_ace_type(type, iflags))
876 entry_type = (iflags & ACE_TYPE_FLAGS);
879 * Skip over owner@, group@ or everyone@ inherit only ACEs
881 if ((iflags & ACE_INHERIT_ONLY_ACE) &&
882 (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
883 entry_type == OWNING_GROUP))
886 if (entry_type == ACE_OWNER || (entry_type == 0 &&
888 if ((access_mask & ACE_READ_DATA) &&
889 (!(seen & S_IRUSR))) {
895 if ((access_mask & ACE_WRITE_DATA) &&
896 (!(seen & S_IWUSR))) {
902 if ((access_mask & ACE_EXECUTE) &&
903 (!(seen & S_IXUSR))) {
909 } else if (entry_type == OWNING_GROUP ||
910 (entry_type == ACE_IDENTIFIER_GROUP && who == fgid)) {
911 if ((access_mask & ACE_READ_DATA) &&
912 (!(seen & S_IRGRP))) {
918 if ((access_mask & ACE_WRITE_DATA) &&
919 (!(seen & S_IWGRP))) {
925 if ((access_mask & ACE_EXECUTE) &&
926 (!(seen & S_IXGRP))) {
932 } else if (entry_type == ACE_EVERYONE) {
933 if ((access_mask & ACE_READ_DATA)) {
934 if (!(seen & S_IRUSR)) {
940 if (!(seen & S_IRGRP)) {
946 if (!(seen & S_IROTH)) {
953 if ((access_mask & ACE_WRITE_DATA)) {
954 if (!(seen & S_IWUSR)) {
960 if (!(seen & S_IWGRP)) {
966 if (!(seen & S_IWOTH)) {
973 if ((access_mask & ACE_EXECUTE)) {
974 if (!(seen & S_IXUSR)) {
980 if (!(seen & S_IXGRP)) {
986 if (!(seen & S_IXOTH)) {
995 * Only care if this IDENTIFIER_GROUP or
996 * USER ACE denies execute access to someone,
997 * mode is not affected
999 if ((access_mask & ACE_EXECUTE) && type == DENY)
1000 an_exec_denied = B_TRUE;
1005 * Failure to allow is effectively a deny, so execute permission
1006 * is denied if it was never mentioned or if we explicitly
1007 * weren't allowed it.
1009 if (!an_exec_denied &&
1010 ((seen & ALL_MODE_EXECS) != ALL_MODE_EXECS ||
1011 (mode & ALL_MODE_EXECS) != ALL_MODE_EXECS))
1012 an_exec_denied = B_TRUE;
1015 *pflags &= ~ZFS_NO_EXECS_DENIED;
1017 *pflags |= ZFS_NO_EXECS_DENIED;
1023 * Read an external acl object. If the intent is to modify, always
1024 * create a new acl and leave any cached acl in place.
1027 zfs_acl_node_read(znode_t *zp, zfs_acl_t **aclpp, boolean_t will_modify)
1032 zfs_acl_node_t *aclnode;
1033 zfs_acl_phys_t znode_acl;
1037 ASSERT(MUTEX_HELD(&zp->z_acl_lock));
1039 if (zp->z_acl_cached && !will_modify) {
1040 *aclpp = zp->z_acl_cached;
1044 version = ZNODE_ACL_VERSION(zp);
1046 if ((error = zfs_acl_znode_info(zp, &aclsize,
1047 &acl_count, &znode_acl)) != 0)
1050 aclp = zfs_acl_alloc(version);
1052 aclp->z_acl_count = acl_count;
1053 aclp->z_acl_bytes = aclsize;
1055 aclnode = zfs_acl_node_alloc(aclsize);
1056 aclnode->z_ace_count = aclp->z_acl_count;
1057 aclnode->z_size = aclsize;
1060 if (znode_acl.z_acl_extern_obj) {
1061 error = dmu_read(zp->z_zfsvfs->z_os,
1062 znode_acl.z_acl_extern_obj, 0, aclnode->z_size,
1063 aclnode->z_acldata, DMU_READ_PREFETCH);
1065 bcopy(znode_acl.z_ace_data, aclnode->z_acldata,
1069 error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DACL_ACES(zp->z_zfsvfs),
1070 aclnode->z_acldata, aclnode->z_size);
1075 zfs_acl_node_free(aclnode);
1076 /* convert checksum errors into IO errors */
1077 if (error == ECKSUM)
1082 list_insert_head(&aclp->z_acl, aclnode);
1086 zp->z_acl_cached = aclp;
1092 zfs_acl_data_locator(void **dataptr, uint32_t *length, uint32_t buflen,
1093 boolean_t start, void *userdata)
1095 zfs_acl_locator_cb_t *cb = (zfs_acl_locator_cb_t *)userdata;
1098 cb->cb_acl_node = list_head(&cb->cb_aclp->z_acl);
1100 cb->cb_acl_node = list_next(&cb->cb_aclp->z_acl,
1103 *dataptr = cb->cb_acl_node->z_acldata;
1104 *length = cb->cb_acl_node->z_size;
1109 zfs_acl_get_owner_fuids(znode_t *zp, uint64_t *fuid, uint64_t *fgid)
1112 sa_bulk_attr_t bulk[2];
1115 if (IS_EPHEMERAL(zp->z_uid) || IS_EPHEMERAL(zp->z_gid)) {
1116 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zp->z_zfsvfs), NULL,
1117 &fuid, sizeof (fuid));
1118 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zp->z_zfsvfs), NULL,
1119 &fgid, sizeof (fuid));
1120 if ((error = sa_bulk_lookup(zp->z_sa_hdl, bulk, count)) != 0) {
1131 zfs_acl_chown_setattr(znode_t *zp)
1135 uint64_t fuid, fgid;
1137 if ((error = zfs_acl_get_owner_fuids(zp, &fuid, &fgid)) != 0)
1140 mutex_enter(&zp->z_acl_lock);
1141 if ((error = zfs_acl_node_read(zp, &aclp, B_FALSE)) == 0)
1142 zp->z_mode = zfs_mode_compute(zp->z_mode, aclp,
1143 &zp->z_pflags, fuid, fgid);
1144 mutex_exit(&zp->z_acl_lock);
1149 * common code for setting ACLs.
1151 * This function is called from zfs_mode_update, zfs_perm_init, and zfs_setacl.
1152 * zfs_setacl passes a non-NULL inherit pointer (ihp) to indicate that it's
1153 * already checked the acl and knows whether to inherit.
1156 zfs_aclset_common(znode_t *zp, zfs_acl_t *aclp, cred_t *cr, dmu_tx_t *tx)
1159 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1160 dmu_object_type_t otype;
1161 zfs_acl_locator_cb_t locate = { 0 };
1163 sa_bulk_attr_t bulk[5];
1166 uint64_t fuid, fgid;
1170 if ((error = zfs_acl_get_owner_fuids(zp, &fuid, &fgid)) != 0)
1173 mode = zfs_mode_compute(mode, aclp, &zp->z_pflags, fuid, fgid);
1176 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
1177 &mode, sizeof (mode));
1178 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
1179 &zp->z_pflags, sizeof (zp->z_pflags));
1180 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
1181 &ctime, sizeof (ctime));
1183 if (zp->z_acl_cached) {
1184 zfs_acl_free(zp->z_acl_cached);
1185 zp->z_acl_cached = NULL;
1191 if (!zfsvfs->z_use_fuids) {
1192 otype = DMU_OT_OLDACL;
1194 if ((aclp->z_version == ZFS_ACL_VERSION_INITIAL) &&
1195 (zfsvfs->z_version >= ZPL_VERSION_FUID))
1196 zfs_acl_xform(zp, aclp, cr);
1197 ASSERT(aclp->z_version >= ZFS_ACL_VERSION_FUID);
1202 * Arrgh, we have to handle old on disk format
1203 * as well as newer (preferred) SA format.
1206 if (zp->z_is_sa) { /* the easy case, just update the ACL attribute */
1207 locate.cb_aclp = aclp;
1208 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_ACES(zfsvfs),
1209 zfs_acl_data_locator, &locate, aclp->z_acl_bytes);
1210 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_COUNT(zfsvfs),
1211 NULL, &aclp->z_acl_count, sizeof (uint64_t));
1212 } else { /* Painful legacy way */
1213 zfs_acl_node_t *aclnode;
1215 zfs_acl_phys_t acl_phys;
1218 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zfsvfs),
1219 &acl_phys, sizeof (acl_phys))) != 0)
1222 aoid = acl_phys.z_acl_extern_obj;
1224 if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
1226 * If ACL was previously external and we are now
1227 * converting to new ACL format then release old
1228 * ACL object and create a new one.
1231 aclp->z_version != acl_phys.z_acl_version) {
1232 error = dmu_object_free(zfsvfs->z_os, aoid, tx);
1238 aoid = dmu_object_alloc(zfsvfs->z_os,
1239 otype, aclp->z_acl_bytes,
1240 otype == DMU_OT_ACL ?
1241 DMU_OT_SYSACL : DMU_OT_NONE,
1242 otype == DMU_OT_ACL ?
1243 DN_MAX_BONUSLEN : 0, tx);
1245 (void) dmu_object_set_blocksize(zfsvfs->z_os,
1246 aoid, aclp->z_acl_bytes, 0, tx);
1248 acl_phys.z_acl_extern_obj = aoid;
1249 for (aclnode = list_head(&aclp->z_acl); aclnode;
1250 aclnode = list_next(&aclp->z_acl, aclnode)) {
1251 if (aclnode->z_ace_count == 0)
1253 dmu_write(zfsvfs->z_os, aoid, off,
1254 aclnode->z_size, aclnode->z_acldata, tx);
1255 off += aclnode->z_size;
1258 void *start = acl_phys.z_ace_data;
1260 * Migrating back embedded?
1262 if (acl_phys.z_acl_extern_obj) {
1263 error = dmu_object_free(zfsvfs->z_os,
1264 acl_phys.z_acl_extern_obj, tx);
1267 acl_phys.z_acl_extern_obj = 0;
1270 for (aclnode = list_head(&aclp->z_acl); aclnode;
1271 aclnode = list_next(&aclp->z_acl, aclnode)) {
1272 if (aclnode->z_ace_count == 0)
1274 bcopy(aclnode->z_acldata, start,
1276 start = (caddr_t)start + aclnode->z_size;
1280 * If Old version then swap count/bytes to match old
1281 * layout of znode_acl_phys_t.
1283 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
1284 acl_phys.z_acl_size = aclp->z_acl_count;
1285 acl_phys.z_acl_count = aclp->z_acl_bytes;
1287 acl_phys.z_acl_size = aclp->z_acl_bytes;
1288 acl_phys.z_acl_count = aclp->z_acl_count;
1290 acl_phys.z_acl_version = aclp->z_version;
1292 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL,
1293 &acl_phys, sizeof (acl_phys));
1297 * Replace ACL wide bits, but first clear them.
1299 zp->z_pflags &= ~ZFS_ACL_WIDE_FLAGS;
1301 zp->z_pflags |= aclp->z_hints;
1303 if (ace_trivial_common(aclp, 0, zfs_ace_walk) == 0)
1304 zp->z_pflags |= ZFS_ACL_TRIVIAL;
1306 zfs_tstamp_update_setup(zp, STATE_CHANGED, NULL, ctime, B_TRUE);
1307 return (sa_bulk_update(zp->z_sa_hdl, bulk, count, tx));
1311 * Update access mask for prepended ACE
1313 * This applies the "groupmask" value for aclmode property.
1316 zfs_acl_prepend_fixup(zfs_acl_t *aclp, void *acep, void *origacep,
1317 mode_t mode, uint64_t owner)
1319 int rmask, wmask, xmask;
1322 uint32_t origmask, acepmask;
1325 aceflags = aclp->z_ops.ace_flags_get(acep);
1326 fuid = aclp->z_ops.ace_who_get(acep);
1327 origmask = aclp->z_ops.ace_mask_get(origacep);
1328 acepmask = aclp->z_ops.ace_mask_get(acep);
1330 user_ace = (!(aceflags &
1331 (ACE_OWNER|ACE_GROUP|ACE_IDENTIFIER_GROUP)));
1333 if (user_ace && (fuid == owner)) {
1343 if (origmask & ACE_READ_DATA) {
1345 acepmask &= ~ACE_READ_DATA;
1347 acepmask |= ACE_READ_DATA;
1351 if (origmask & ACE_WRITE_DATA) {
1353 acepmask &= ~ACE_WRITE_DATA;
1355 acepmask |= ACE_WRITE_DATA;
1359 if (origmask & ACE_APPEND_DATA) {
1361 acepmask &= ~ACE_APPEND_DATA;
1363 acepmask |= ACE_APPEND_DATA;
1367 if (origmask & ACE_EXECUTE) {
1369 acepmask &= ~ACE_EXECUTE;
1371 acepmask |= ACE_EXECUTE;
1374 aclp->z_ops.ace_mask_set(acep, acepmask);
1378 zfs_acl_chmod(zfsvfs_t *zfsvfs, uint64_t mode, zfs_acl_t *aclp)
1382 int new_count, new_bytes;
1385 uint16_t iflags, type;
1386 uint32_t access_mask;
1387 zfs_acl_node_t *newnode;
1388 size_t abstract_size = aclp->z_ops.ace_abstract_size();
1390 uint32_t owner, group, everyone;
1391 uint32_t deny1, deny2, allow0;
1393 new_count = new_bytes = 0;
1395 acl_trivial_access_masks((mode_t)mode, &allow0, &deny1, &deny2,
1396 &owner, &group, &everyone);
1398 newnode = zfs_acl_node_alloc((abstract_size * 6) + aclp->z_acl_bytes);
1400 zacep = newnode->z_acldata;
1402 zfs_set_ace(aclp, zacep, allow0, ALLOW, -1, ACE_OWNER);
1403 zacep = (void *)((uintptr_t)zacep + abstract_size);
1405 new_bytes += abstract_size;
1407 zfs_set_ace(aclp, zacep, deny1, DENY, -1, ACE_OWNER);
1408 zacep = (void *)((uintptr_t)zacep + abstract_size);
1410 new_bytes += abstract_size;
1413 zfs_set_ace(aclp, zacep, deny2, DENY, -1, OWNING_GROUP);
1414 zacep = (void *)((uintptr_t)zacep + abstract_size);
1416 new_bytes += abstract_size;
1419 while (acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
1421 uint16_t inherit_flags;
1423 entry_type = (iflags & ACE_TYPE_FLAGS);
1424 inherit_flags = (iflags & ALL_INHERIT);
1426 if ((entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
1427 (entry_type == OWNING_GROUP)) &&
1428 ((inherit_flags & ACE_INHERIT_ONLY_ACE) == 0)) {
1432 if ((type != ALLOW && type != DENY) ||
1433 (inherit_flags & ACE_INHERIT_ONLY_ACE)) {
1435 aclp->z_hints |= ZFS_INHERIT_ACE;
1437 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1438 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1439 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1440 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
1441 aclp->z_hints |= ZFS_ACL_OBJ_ACE;
1447 * Limit permissions to be no greater than
1450 if (zfsvfs->z_acl_inherit == ZFS_ACL_RESTRICTED) {
1451 if (!(mode & S_IRGRP))
1452 access_mask &= ~ACE_READ_DATA;
1453 if (!(mode & S_IWGRP))
1455 ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
1456 if (!(mode & S_IXGRP))
1457 access_mask &= ~ACE_EXECUTE;
1459 ~(ACE_WRITE_OWNER|ACE_WRITE_ACL|
1460 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS);
1463 zfs_set_ace(aclp, zacep, access_mask, type, who, iflags);
1464 ace_size = aclp->z_ops.ace_size(acep);
1465 zacep = (void *)((uintptr_t)zacep + ace_size);
1467 new_bytes += ace_size;
1469 zfs_set_ace(aclp, zacep, owner, 0, -1, ACE_OWNER);
1470 zacep = (void *)((uintptr_t)zacep + abstract_size);
1471 zfs_set_ace(aclp, zacep, group, 0, -1, OWNING_GROUP);
1472 zacep = (void *)((uintptr_t)zacep + abstract_size);
1473 zfs_set_ace(aclp, zacep, everyone, 0, -1, ACE_EVERYONE);
1476 new_bytes += abstract_size * 3;
1477 zfs_acl_release_nodes(aclp);
1478 aclp->z_acl_count = new_count;
1479 aclp->z_acl_bytes = new_bytes;
1480 newnode->z_ace_count = new_count;
1481 newnode->z_size = new_bytes;
1482 list_insert_tail(&aclp->z_acl, newnode);
1486 zfs_acl_chmod_setattr(znode_t *zp, zfs_acl_t **aclp, uint64_t mode)
1488 mutex_enter(&zp->z_lock);
1489 mutex_enter(&zp->z_acl_lock);
1490 *aclp = zfs_acl_alloc(zfs_acl_version_zp(zp));
1491 (*aclp)->z_hints = zp->z_pflags & V4_ACL_WIDE_FLAGS;
1492 zfs_acl_chmod(zp->z_zfsvfs, mode, *aclp);
1493 mutex_exit(&zp->z_acl_lock);
1494 mutex_exit(&zp->z_lock);
1500 * strip off write_owner and write_acl
1503 zfs_restricted_update(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, void *acep)
1505 uint32_t mask = aclp->z_ops.ace_mask_get(acep);
1507 if ((zfsvfs->z_acl_inherit == ZFS_ACL_RESTRICTED) &&
1508 (aclp->z_ops.ace_type_get(acep) == ALLOW)) {
1509 mask &= ~RESTRICTED_CLEAR;
1510 aclp->z_ops.ace_mask_set(acep, mask);
1515 * Should ACE be inherited?
1518 zfs_ace_can_use(vtype_t vtype, uint16_t acep_flags)
1520 int iflags = (acep_flags & 0xf);
1522 if ((vtype == VDIR) && (iflags & ACE_DIRECTORY_INHERIT_ACE))
1524 else if (iflags & ACE_FILE_INHERIT_ACE)
1525 return (!((vtype == VDIR) &&
1526 (iflags & ACE_NO_PROPAGATE_INHERIT_ACE)));
1531 * inherit inheritable ACEs from parent
1534 zfs_acl_inherit(zfsvfs_t *zfsvfs, vtype_t vtype, zfs_acl_t *paclp,
1535 uint64_t mode, boolean_t *need_chmod)
1539 zfs_acl_node_t *aclnode;
1540 zfs_acl_t *aclp = NULL;
1542 uint32_t access_mask;
1543 uint16_t iflags, newflags, type;
1545 void *data1, *data2;
1546 size_t data1sz, data2sz;
1547 boolean_t vdir = vtype == VDIR;
1548 boolean_t vreg = vtype == VREG;
1549 boolean_t passthrough, passthrough_x, noallow;
1552 zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH_X;
1553 passthrough = passthrough_x ||
1554 zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH;
1556 zfsvfs->z_acl_inherit == ZFS_ACL_NOALLOW;
1558 *need_chmod = B_TRUE;
1560 aclp = zfs_acl_alloc(paclp->z_version);
1561 if (zfsvfs->z_acl_inherit == ZFS_ACL_DISCARD || vtype == VLNK)
1563 while (pacep = zfs_acl_next_ace(paclp, pacep, &who,
1564 &access_mask, &iflags, &type)) {
1567 * don't inherit bogus ACEs
1569 if (!zfs_acl_valid_ace_type(type, iflags))
1572 if (noallow && type == ALLOW)
1575 ace_size = aclp->z_ops.ace_size(pacep);
1577 if (!zfs_ace_can_use(vtype, iflags))
1581 * If owner@, group@, or everyone@ inheritable
1582 * then zfs_acl_chmod() isn't needed.
1585 ((iflags & (ACE_OWNER|ACE_EVERYONE)) ||
1586 ((iflags & OWNING_GROUP) ==
1587 OWNING_GROUP)) && (vreg || (vdir && (iflags &
1588 ACE_DIRECTORY_INHERIT_ACE)))) {
1589 *need_chmod = B_FALSE;
1592 if (!vdir && passthrough_x &&
1593 ((mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0)) {
1594 access_mask &= ~ACE_EXECUTE;
1597 aclnode = zfs_acl_node_alloc(ace_size);
1598 list_insert_tail(&aclp->z_acl, aclnode);
1599 acep = aclnode->z_acldata;
1601 zfs_set_ace(aclp, acep, access_mask, type,
1602 who, iflags|ACE_INHERITED_ACE);
1605 * Copy special opaque data if any
1607 if ((data1sz = paclp->z_ops.ace_data(pacep, &data1)) != 0) {
1608 VERIFY((data2sz = aclp->z_ops.ace_data(acep,
1609 &data2)) == data1sz);
1610 bcopy(data1, data2, data2sz);
1613 aclp->z_acl_count++;
1614 aclnode->z_ace_count++;
1615 aclp->z_acl_bytes += aclnode->z_size;
1616 newflags = aclp->z_ops.ace_flags_get(acep);
1619 aclp->z_hints |= ZFS_INHERIT_ACE;
1621 if ((iflags & ACE_NO_PROPAGATE_INHERIT_ACE) || !vdir) {
1622 newflags &= ~ALL_INHERIT;
1623 aclp->z_ops.ace_flags_set(acep,
1624 newflags|ACE_INHERITED_ACE);
1625 zfs_restricted_update(zfsvfs, aclp, acep);
1632 * If only FILE_INHERIT is set then turn on
1635 if ((iflags & (ACE_FILE_INHERIT_ACE |
1636 ACE_DIRECTORY_INHERIT_ACE)) == ACE_FILE_INHERIT_ACE) {
1637 newflags |= ACE_INHERIT_ONLY_ACE;
1638 aclp->z_ops.ace_flags_set(acep,
1639 newflags|ACE_INHERITED_ACE);
1641 newflags &= ~ACE_INHERIT_ONLY_ACE;
1642 aclp->z_ops.ace_flags_set(acep,
1643 newflags|ACE_INHERITED_ACE);
1650 * Create file system object initial permissions
1651 * including inheritable ACEs.
1654 zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
1655 vsecattr_t *vsecp, zfs_acl_ids_t *acl_ids)
1658 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
1661 boolean_t need_chmod = B_TRUE;
1662 boolean_t inherited = B_FALSE;
1665 bzero(acl_ids, sizeof (zfs_acl_ids_t));
1666 acl_ids->z_mode = MAKEIMODE(vap->va_type, vap->va_mode);
1669 if ((error = zfs_vsec_2_aclp(zfsvfs, vap->va_type, vsecp, cr,
1670 &acl_ids->z_fuidp, &acl_ids->z_aclp)) != 0)
1673 * Determine uid and gid.
1675 if ((flag & IS_ROOT_NODE) || zfsvfs->z_replay ||
1676 ((flag & IS_XATTR) && (vap->va_type == VDIR))) {
1677 acl_ids->z_fuid = zfs_fuid_create(zfsvfs,
1678 (uint64_t)vap->va_uid, cr,
1679 ZFS_OWNER, &acl_ids->z_fuidp);
1680 acl_ids->z_fgid = zfs_fuid_create(zfsvfs,
1681 (uint64_t)vap->va_gid, cr,
1682 ZFS_GROUP, &acl_ids->z_fuidp);
1685 if (IS_EPHEMERAL(dzp->z_gid))
1686 VERIFY(0 == sa_lookup(dzp->z_sa_hdl, SA_ZPL_GID(zfsvfs),
1687 &parentgid, sizeof (parentgid)));
1689 parentgid = (uint64_t)dzp->z_gid;
1691 acl_ids->z_fuid = zfs_fuid_create_cred(zfsvfs, ZFS_OWNER,
1692 cr, &acl_ids->z_fuidp);
1693 acl_ids->z_fgid = 0;
1694 if (vap->va_mask & AT_GID) {
1695 acl_ids->z_fgid = zfs_fuid_create(zfsvfs,
1696 (uint64_t)vap->va_gid,
1697 cr, ZFS_GROUP, &acl_ids->z_fuidp);
1699 if (acl_ids->z_fgid != parentgid &&
1700 !groupmember(vap->va_gid, cr) &&
1701 secpolicy_vnode_create_gid(cr) != 0)
1702 acl_ids->z_fgid = 0;
1704 if (acl_ids->z_fgid == 0) {
1705 if (dzp->z_mode & S_ISGID) {
1709 acl_ids->z_fgid = parentgid;
1710 gid = zfs_fuid_map_id(zfsvfs, acl_ids->z_fgid,
1713 if (zfsvfs->z_use_fuids &&
1714 IS_EPHEMERAL(acl_ids->z_fgid)) {
1715 domain = zfs_fuid_idx_domain(
1716 &zfsvfs->z_fuid_idx,
1717 FUID_INDEX(acl_ids->z_fgid));
1718 rid = FUID_RID(acl_ids->z_fgid);
1719 zfs_fuid_node_add(&acl_ids->z_fuidp,
1721 FUID_INDEX(acl_ids->z_fgid),
1722 acl_ids->z_fgid, ZFS_GROUP);
1725 acl_ids->z_fgid = zfs_fuid_create_cred(zfsvfs,
1726 ZFS_GROUP, cr, &acl_ids->z_fuidp);
1733 * If we're creating a directory, and the parent directory has the
1734 * set-GID bit set, set in on the new directory.
1735 * Otherwise, if the user is neither privileged nor a member of the
1736 * file's new group, clear the file's set-GID bit.
1739 if (!(flag & IS_ROOT_NODE) && (dzp->z_mode & S_ISGID) &&
1740 (vap->va_type == VDIR)) {
1741 acl_ids->z_mode |= S_ISGID;
1743 if ((acl_ids->z_mode & S_ISGID) &&
1744 secpolicy_vnode_setids_setgids(cr, gid) != 0)
1745 acl_ids->z_mode &= ~S_ISGID;
1748 if (acl_ids->z_aclp == NULL) {
1749 mutex_enter(&dzp->z_lock);
1750 if (!(flag & IS_ROOT_NODE) && (ZTOV(dzp)->v_type == VDIR &&
1751 (dzp->z_pflags & ZFS_INHERIT_ACE)) &&
1752 !(dzp->z_pflags & ZFS_XATTR)) {
1753 mutex_enter(&dzp->z_acl_lock);
1754 VERIFY(0 == zfs_acl_node_read(dzp, &paclp, B_FALSE));
1755 acl_ids->z_aclp = zfs_acl_inherit(zfsvfs,
1756 vap->va_type, paclp, acl_ids->z_mode, &need_chmod);
1757 mutex_exit(&dzp->z_acl_lock);
1761 zfs_acl_alloc(zfs_acl_version_zp(dzp));
1762 acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL;
1764 mutex_exit(&dzp->z_lock);
1766 acl_ids->z_aclp->z_hints |= (vap->va_type == VDIR) ?
1767 ZFS_ACL_AUTO_INHERIT : 0;
1768 zfs_acl_chmod(zfsvfs, acl_ids->z_mode, acl_ids->z_aclp);
1772 if (inherited || vsecp) {
1773 acl_ids->z_mode = zfs_mode_compute(acl_ids->z_mode,
1774 acl_ids->z_aclp, &acl_ids->z_aclp->z_hints,
1775 acl_ids->z_fuid, acl_ids->z_fgid);
1776 if (ace_trivial_common(acl_ids->z_aclp, 0, zfs_ace_walk) == 0)
1777 acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL;
1784 * Free ACL and fuid_infop, but not the acl_ids structure
1787 zfs_acl_ids_free(zfs_acl_ids_t *acl_ids)
1789 if (acl_ids->z_aclp)
1790 zfs_acl_free(acl_ids->z_aclp);
1791 if (acl_ids->z_fuidp)
1792 zfs_fuid_info_free(acl_ids->z_fuidp);
1793 acl_ids->z_aclp = NULL;
1794 acl_ids->z_fuidp = NULL;
1798 zfs_acl_ids_overquota(zfsvfs_t *zfsvfs, zfs_acl_ids_t *acl_ids)
1800 return (zfs_fuid_overquota(zfsvfs, B_FALSE, acl_ids->z_fuid) ||
1801 zfs_fuid_overquota(zfsvfs, B_TRUE, acl_ids->z_fgid));
1805 * Retrieve a files ACL
1808 zfs_getacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
1816 mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT |
1817 VSA_ACE_ACLFLAGS | VSA_ACE_ALLTYPES);
1822 if (error = zfs_zaccess(zp, ACE_READ_ACL, 0, skipaclchk, cr))
1825 mutex_enter(&zp->z_acl_lock);
1827 error = zfs_acl_node_read(zp, &aclp, B_FALSE);
1829 mutex_exit(&zp->z_acl_lock);
1834 * Scan ACL to determine number of ACEs
1836 if ((zp->z_pflags & ZFS_ACL_OBJ_ACE) && !(mask & VSA_ACE_ALLTYPES)) {
1839 uint32_t access_mask;
1840 uint16_t type, iflags;
1842 while (zacep = zfs_acl_next_ace(aclp, zacep,
1843 &who, &access_mask, &iflags, &type)) {
1845 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1846 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1847 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1848 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
1855 vsecp->vsa_aclcnt = count;
1857 count = (int)aclp->z_acl_count;
1859 if (mask & VSA_ACECNT) {
1860 vsecp->vsa_aclcnt = count;
1863 if (mask & VSA_ACE) {
1866 aclsz = count * sizeof (ace_t) +
1867 sizeof (ace_object_t) * largeace;
1869 vsecp->vsa_aclentp = kmem_alloc(aclsz, KM_SLEEP);
1870 vsecp->vsa_aclentsz = aclsz;
1872 if (aclp->z_version == ZFS_ACL_VERSION_FUID)
1873 zfs_copy_fuid_2_ace(zp->z_zfsvfs, aclp, cr,
1874 vsecp->vsa_aclentp, !(mask & VSA_ACE_ALLTYPES));
1876 zfs_acl_node_t *aclnode;
1877 void *start = vsecp->vsa_aclentp;
1879 for (aclnode = list_head(&aclp->z_acl); aclnode;
1880 aclnode = list_next(&aclp->z_acl, aclnode)) {
1881 bcopy(aclnode->z_acldata, start,
1883 start = (caddr_t)start + aclnode->z_size;
1885 ASSERT((caddr_t)start - (caddr_t)vsecp->vsa_aclentp ==
1889 if (mask & VSA_ACE_ACLFLAGS) {
1890 vsecp->vsa_aclflags = 0;
1891 if (zp->z_pflags & ZFS_ACL_DEFAULTED)
1892 vsecp->vsa_aclflags |= ACL_DEFAULTED;
1893 if (zp->z_pflags & ZFS_ACL_PROTECTED)
1894 vsecp->vsa_aclflags |= ACL_PROTECTED;
1895 if (zp->z_pflags & ZFS_ACL_AUTO_INHERIT)
1896 vsecp->vsa_aclflags |= ACL_AUTO_INHERIT;
1899 mutex_exit(&zp->z_acl_lock);
1905 zfs_vsec_2_aclp(zfsvfs_t *zfsvfs, vtype_t obj_type,
1906 vsecattr_t *vsecp, cred_t *cr, zfs_fuid_info_t **fuidp, zfs_acl_t **zaclp)
1909 zfs_acl_node_t *aclnode;
1910 int aclcnt = vsecp->vsa_aclcnt;
1913 if (vsecp->vsa_aclcnt > MAX_ACL_ENTRIES || vsecp->vsa_aclcnt <= 0)
1916 aclp = zfs_acl_alloc(zfs_acl_version(zfsvfs->z_version));
1919 aclnode = zfs_acl_node_alloc(aclcnt * sizeof (zfs_object_ace_t));
1920 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
1921 if ((error = zfs_copy_ace_2_oldace(obj_type, aclp,
1922 (ace_t *)vsecp->vsa_aclentp, aclnode->z_acldata,
1923 aclcnt, &aclnode->z_size)) != 0) {
1925 zfs_acl_node_free(aclnode);
1929 if ((error = zfs_copy_ace_2_fuid(zfsvfs, obj_type, aclp,
1930 vsecp->vsa_aclentp, aclnode->z_acldata, aclcnt,
1931 &aclnode->z_size, fuidp, cr)) != 0) {
1933 zfs_acl_node_free(aclnode);
1937 aclp->z_acl_bytes = aclnode->z_size;
1938 aclnode->z_ace_count = aclcnt;
1939 aclp->z_acl_count = aclcnt;
1940 list_insert_head(&aclp->z_acl, aclnode);
1943 * If flags are being set then add them to z_hints
1945 if (vsecp->vsa_mask & VSA_ACE_ACLFLAGS) {
1946 if (vsecp->vsa_aclflags & ACL_PROTECTED)
1947 aclp->z_hints |= ZFS_ACL_PROTECTED;
1948 if (vsecp->vsa_aclflags & ACL_DEFAULTED)
1949 aclp->z_hints |= ZFS_ACL_DEFAULTED;
1950 if (vsecp->vsa_aclflags & ACL_AUTO_INHERIT)
1951 aclp->z_hints |= ZFS_ACL_AUTO_INHERIT;
1963 zfs_setacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
1965 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1966 zilog_t *zilog = zfsvfs->z_log;
1967 ulong_t mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT);
1971 zfs_fuid_info_t *fuidp = NULL;
1972 boolean_t fuid_dirtied;
1977 if (zp->z_pflags & ZFS_IMMUTABLE)
1980 if (error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr))
1983 error = zfs_vsec_2_aclp(zfsvfs, ZTOV(zp)->v_type, vsecp, cr, &fuidp,
1989 * If ACL wide flags aren't being set then preserve any
1992 if (!(vsecp->vsa_mask & VSA_ACE_ACLFLAGS)) {
1994 (zp->z_pflags & V4_ACL_WIDE_FLAGS);
1997 mutex_enter(&zp->z_lock);
1998 mutex_enter(&zp->z_acl_lock);
2000 tx = dmu_tx_create(zfsvfs->z_os);
2002 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
2004 fuid_dirtied = zfsvfs->z_fuid_dirty;
2006 zfs_fuid_txhold(zfsvfs, tx);
2009 * If old version and ACL won't fit in bonus and we aren't
2010 * upgrading then take out necessary DMU holds
2013 if (ZFS_EXTERNAL_ACL(zp)) {
2014 if (zfsvfs->z_version <= ZPL_VERSION_SA &&
2015 ZNODE_ACL_VERSION(zp) <= ZFS_ACL_VERSION_INITIAL) {
2016 dmu_tx_hold_free(tx, ZFS_EXTERNAL_ACL(zp), 0,
2019 dmu_tx_hold_write(tx, ZFS_EXTERNAL_ACL(zp),
2020 0, aclp->z_acl_bytes);
2022 } else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) {
2023 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, aclp->z_acl_bytes);
2026 zfs_sa_upgrade_txholds(tx, zp);
2027 error = dmu_tx_assign(tx, TXG_NOWAIT);
2029 mutex_exit(&zp->z_acl_lock);
2030 mutex_exit(&zp->z_lock);
2032 if (error == ERESTART) {
2042 error = zfs_aclset_common(zp, aclp, cr, tx);
2044 zp->z_acl_cached = aclp;
2047 zfs_fuid_sync(zfsvfs, tx);
2049 zfs_log_acl(zilog, tx, zp, vsecp, fuidp);
2052 zfs_fuid_info_free(fuidp);
2055 mutex_exit(&zp->z_acl_lock);
2056 mutex_exit(&zp->z_lock);
2062 * Check accesses of interest (AoI) against attributes of the dataset
2063 * such as read-only. Returns zero if no AoI conflict with dataset
2064 * attributes, otherwise an appropriate errno is returned.
2067 zfs_zaccess_dataset_check(znode_t *zp, uint32_t v4_mode)
2069 if ((v4_mode & WRITE_MASK) &&
2070 (zp->z_zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) &&
2071 (!IS_DEVVP(ZTOV(zp)) ||
2072 (IS_DEVVP(ZTOV(zp)) && (v4_mode & WRITE_MASK_ATTRS)))) {
2077 * Only check for READONLY on non-directories.
2079 if ((v4_mode & WRITE_MASK_DATA) &&
2080 (((ZTOV(zp)->v_type != VDIR) &&
2081 (zp->z_pflags & (ZFS_READONLY | ZFS_IMMUTABLE))) ||
2082 (ZTOV(zp)->v_type == VDIR &&
2083 (zp->z_pflags & ZFS_IMMUTABLE)))) {
2087 if ((v4_mode & (ACE_DELETE | ACE_DELETE_CHILD)) &&
2088 (zp->z_pflags & ZFS_NOUNLINK)) {
2092 if (((v4_mode & (ACE_READ_DATA|ACE_EXECUTE)) &&
2093 (zp->z_pflags & ZFS_AV_QUARANTINED))) {
2101 * The primary usage of this function is to loop through all of the
2102 * ACEs in the znode, determining what accesses of interest (AoI) to
2103 * the caller are allowed or denied. The AoI are expressed as bits in
2104 * the working_mode parameter. As each ACE is processed, bits covered
2105 * by that ACE are removed from the working_mode. This removal
2106 * facilitates two things. The first is that when the working mode is
2107 * empty (= 0), we know we've looked at all the AoI. The second is
2108 * that the ACE interpretation rules don't allow a later ACE to undo
2109 * something granted or denied by an earlier ACE. Removing the
2110 * discovered access or denial enforces this rule. At the end of
2111 * processing the ACEs, all AoI that were found to be denied are
2112 * placed into the working_mode, giving the caller a mask of denied
2113 * accesses. Returns:
2114 * 0 if all AoI granted
2115 * EACCESS if the denied mask is non-zero
2116 * other error if abnormal failure (e.g., IO error)
2118 * A secondary usage of the function is to determine if any of the
2119 * AoI are granted. If an ACE grants any access in
2120 * the working_mode, we immediately short circuit out of the function.
2121 * This mode is chosen by setting anyaccess to B_TRUE. The
2122 * working_mode is not a denied access mask upon exit if the function
2123 * is used in this manner.
2126 zfs_zaccess_aces_check(znode_t *zp, uint32_t *working_mode,
2127 boolean_t anyaccess, cred_t *cr)
2129 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2132 uid_t uid = crgetuid(cr);
2134 uint16_t type, iflags;
2135 uint16_t entry_type;
2136 uint32_t access_mask;
2137 uint32_t deny_mask = 0;
2138 zfs_ace_hdr_t *acep = NULL;
2142 mutex_enter(&zp->z_acl_lock);
2144 error = zfs_acl_node_read(zp, &aclp, B_FALSE);
2146 mutex_exit(&zp->z_acl_lock);
2150 ASSERT(zp->z_acl_cached);
2152 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_GID(zfsvfs),
2153 &gowner, sizeof (gowner))) != 0) {
2154 mutex_exit(&zp->z_acl_lock);
2158 while (acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
2160 uint32_t mask_matched;
2162 if (!zfs_acl_valid_ace_type(type, iflags))
2165 if (ZTOV(zp)->v_type == VDIR && (iflags & ACE_INHERIT_ONLY_ACE))
2168 /* Skip ACE if it does not affect any AoI */
2169 mask_matched = (access_mask & *working_mode);
2173 entry_type = (iflags & ACE_TYPE_FLAGS);
2177 switch (entry_type) {
2179 if (uid == zp->z_uid)
2185 case ACE_IDENTIFIER_GROUP:
2186 checkit = zfs_groupmember(zfsvfs, who, cr);
2194 if (entry_type == 0) {
2197 newid = zfs_fuid_map_id(zfsvfs, who, cr,
2199 if (newid != IDMAP_WK_CREATOR_OWNER_UID &&
2204 mutex_exit(&zp->z_acl_lock);
2211 DTRACE_PROBE3(zfs__ace__denies,
2213 zfs_ace_hdr_t *, acep,
2214 uint32_t, mask_matched);
2215 deny_mask |= mask_matched;
2217 DTRACE_PROBE3(zfs__ace__allows,
2219 zfs_ace_hdr_t *, acep,
2220 uint32_t, mask_matched);
2222 mutex_exit(&zp->z_acl_lock);
2226 *working_mode &= ~mask_matched;
2230 if (*working_mode == 0)
2234 mutex_exit(&zp->z_acl_lock);
2236 /* Put the found 'denies' back on the working mode */
2238 *working_mode |= deny_mask;
2240 } else if (*working_mode) {
2248 * Return true if any access whatsoever granted, we don't actually
2249 * care what access is granted.
2252 zfs_has_access(znode_t *zp, cred_t *cr)
2254 uint32_t have = ACE_ALL_PERMS;
2256 if (zfs_zaccess_aces_check(zp, &have, B_TRUE, cr) != 0) {
2257 return (secpolicy_vnode_any_access(cr, ZTOV(zp),
2264 zfs_zaccess_common(znode_t *zp, uint32_t v4_mode, uint32_t *working_mode,
2265 boolean_t *check_privs, boolean_t skipaclchk, cred_t *cr)
2267 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2270 *working_mode = v4_mode;
2271 *check_privs = B_TRUE;
2274 * Short circuit empty requests
2276 if (v4_mode == 0 || zfsvfs->z_replay) {
2281 if ((err = zfs_zaccess_dataset_check(zp, v4_mode)) != 0) {
2282 *check_privs = B_FALSE;
2287 * The caller requested that the ACL check be skipped. This
2288 * would only happen if the caller checked VOP_ACCESS() with a
2289 * 32 bit ACE mask and already had the appropriate permissions.
2296 return (zfs_zaccess_aces_check(zp, working_mode, B_FALSE, cr));
2300 zfs_zaccess_append(znode_t *zp, uint32_t *working_mode, boolean_t *check_privs,
2303 if (*working_mode != ACE_WRITE_DATA)
2306 return (zfs_zaccess_common(zp, ACE_APPEND_DATA, working_mode,
2307 check_privs, B_FALSE, cr));
2311 zfs_fastaccesschk_execute(znode_t *zdp, cred_t *cr)
2313 boolean_t owner = B_FALSE;
2314 boolean_t groupmbr = B_FALSE;
2316 uid_t uid = crgetuid(cr);
2319 if (zdp->z_pflags & ZFS_AV_QUARANTINED)
2322 is_attr = ((zdp->z_pflags & ZFS_XATTR) &&
2323 (ZTOV(zdp)->v_type == VDIR));
2328 mutex_enter(&zdp->z_acl_lock);
2330 if (zdp->z_pflags & ZFS_NO_EXECS_DENIED) {
2331 mutex_exit(&zdp->z_acl_lock);
2335 if (IS_EPHEMERAL(zdp->z_uid) != 0 || IS_EPHEMERAL(zdp->z_gid) != 0) {
2336 mutex_exit(&zdp->z_acl_lock);
2340 if (uid == zdp->z_uid) {
2342 if (zdp->z_mode & S_IXUSR) {
2343 mutex_exit(&zdp->z_acl_lock);
2346 mutex_exit(&zdp->z_acl_lock);
2350 if (groupmember(zdp->z_gid, cr)) {
2352 if (zdp->z_mode & S_IXGRP) {
2353 mutex_exit(&zdp->z_acl_lock);
2356 mutex_exit(&zdp->z_acl_lock);
2360 if (!owner && !groupmbr) {
2361 if (zdp->z_mode & S_IXOTH) {
2362 mutex_exit(&zdp->z_acl_lock);
2367 mutex_exit(&zdp->z_acl_lock);
2370 DTRACE_PROBE(zfs__fastpath__execute__access__miss);
2371 ZFS_ENTER(zdp->z_zfsvfs);
2372 error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr);
2373 ZFS_EXIT(zdp->z_zfsvfs);
2378 * Determine whether Access should be granted/denied.
2379 * The least priv subsytem is always consulted as a basic privilege
2380 * can define any form of access.
2383 zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr)
2385 uint32_t working_mode;
2388 boolean_t check_privs;
2390 znode_t *check_zp = zp;
2393 is_attr = ((zp->z_pflags & ZFS_XATTR) && (ZTOV(zp)->v_type == VDIR));
2396 * If attribute then validate against base file
2401 if ((error = sa_lookup(zp->z_sa_hdl,
2402 SA_ZPL_PARENT(zp->z_zfsvfs), &parent,
2403 sizeof (parent))) != 0)
2406 if ((error = zfs_zget(zp->z_zfsvfs,
2407 parent, &xzp)) != 0) {
2414 * fixup mode to map to xattr perms
2417 if (mode & (ACE_WRITE_DATA|ACE_APPEND_DATA)) {
2418 mode &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
2419 mode |= ACE_WRITE_NAMED_ATTRS;
2422 if (mode & (ACE_READ_DATA|ACE_EXECUTE)) {
2423 mode &= ~(ACE_READ_DATA|ACE_EXECUTE);
2424 mode |= ACE_READ_NAMED_ATTRS;
2429 * Map the bits required to the standard vnode flags VREAD|VWRITE|VEXEC
2430 * in needed_bits. Map the bits mapped by working_mode (currently
2431 * missing) in missing_bits.
2432 * Call secpolicy_vnode_access2() with (needed_bits & ~checkmode),
2437 working_mode = mode;
2438 if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES)) &&
2439 zp->z_uid == crgetuid(cr))
2440 working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES);
2442 if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS|
2443 ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE))
2444 needed_bits |= VREAD;
2445 if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
2446 ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
2447 needed_bits |= VWRITE;
2448 if (working_mode & ACE_EXECUTE)
2449 needed_bits |= VEXEC;
2451 if ((error = zfs_zaccess_common(check_zp, mode, &working_mode,
2452 &check_privs, skipaclchk, cr)) == 0) {
2455 return (secpolicy_vnode_access2(cr, ZTOV(zp), zp->z_uid,
2456 needed_bits, needed_bits));
2459 if (error && !check_privs) {
2465 if (error && (flags & V_APPEND)) {
2466 error = zfs_zaccess_append(zp, &working_mode, &check_privs, cr);
2469 if (error && check_privs) {
2470 mode_t checkmode = 0;
2473 * First check for implicit owner permission on
2474 * read_acl/read_attributes
2478 ASSERT(working_mode != 0);
2480 if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES) &&
2481 zp->z_uid == crgetuid(cr)))
2482 working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES);
2484 if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS|
2485 ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE))
2487 if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
2488 ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
2489 checkmode |= VWRITE;
2490 if (working_mode & ACE_EXECUTE)
2493 error = secpolicy_vnode_access2(cr, ZTOV(check_zp), zp->z_uid,
2494 needed_bits & ~checkmode, needed_bits);
2496 if (error == 0 && (working_mode & ACE_WRITE_OWNER))
2497 error = secpolicy_vnode_chown(cr, zp->z_uid);
2498 if (error == 0 && (working_mode & ACE_WRITE_ACL))
2499 error = secpolicy_vnode_setdac(cr, zp->z_uid);
2501 if (error == 0 && (working_mode &
2502 (ACE_DELETE|ACE_DELETE_CHILD)))
2503 error = secpolicy_vnode_remove(cr);
2505 if (error == 0 && (working_mode & ACE_SYNCHRONIZE)) {
2506 error = secpolicy_vnode_chown(cr, zp->z_uid);
2510 * See if any bits other than those already checked
2511 * for are still present. If so then return EACCES
2513 if (working_mode & ~(ZFS_CHECKED_MASKS)) {
2517 } else if (error == 0) {
2518 error = secpolicy_vnode_access2(cr, ZTOV(zp), zp->z_uid,
2519 needed_bits, needed_bits);
2530 * Translate traditional unix VREAD/VWRITE/VEXEC mode into
2531 * native ACL format and call zfs_zaccess()
2534 zfs_zaccess_rwx(znode_t *zp, mode_t mode, int flags, cred_t *cr)
2536 return (zfs_zaccess(zp, zfs_unix_to_v4(mode >> 6), flags, B_FALSE, cr));
2540 * Access function for secpolicy_vnode_setattr
2543 zfs_zaccess_unix(znode_t *zp, mode_t mode, cred_t *cr)
2545 int v4_mode = zfs_unix_to_v4(mode >> 6);
2547 return (zfs_zaccess(zp, v4_mode, 0, B_FALSE, cr));
2551 zfs_delete_final_check(znode_t *zp, znode_t *dzp,
2552 mode_t available_perms, cred_t *cr)
2556 error = secpolicy_vnode_access2(cr, ZTOV(dzp),
2557 dzp->z_uid, available_perms, VWRITE|VEXEC);
2560 error = zfs_sticky_remove_access(dzp, zp, cr);
2566 * Determine whether Access should be granted/deny, without
2567 * consulting least priv subsystem.
2570 * The following chart is the recommended NFSv4 enforcement for
2571 * ability to delete an object.
2573 * -------------------------------------------------------
2574 * | Parent Dir | Target Object Permissions |
2576 * -------------------------------------------------------
2577 * | | ACL Allows | ACL Denies| Delete |
2578 * | | Delete | Delete | unspecified|
2579 * -------------------------------------------------------
2580 * | ACL Allows | Permit | Permit | Permit |
2581 * | DELETE_CHILD | |
2582 * -------------------------------------------------------
2583 * | ACL Denies | Permit | Deny | Deny |
2584 * | DELETE_CHILD | | | |
2585 * -------------------------------------------------------
2586 * | ACL specifies | | | |
2587 * | only allow | Permit | Permit | Permit |
2588 * | write and | | | |
2590 * -------------------------------------------------------
2591 * | ACL denies | | | |
2592 * | write and | Permit | Deny | Deny |
2594 * -------------------------------------------------------
2597 * No search privilege, can't even look up file?
2601 zfs_zaccess_delete(znode_t *dzp, znode_t *zp, cred_t *cr)
2603 uint32_t dzp_working_mode = 0;
2604 uint32_t zp_working_mode = 0;
2605 int dzp_error, zp_error;
2606 mode_t available_perms;
2607 boolean_t dzpcheck_privs = B_TRUE;
2608 boolean_t zpcheck_privs = B_TRUE;
2611 * We want specific DELETE permissions to
2612 * take precedence over WRITE/EXECUTE. We don't
2613 * want an ACL such as this to mess us up.
2614 * user:joe:write_data:deny,user:joe:delete:allow
2616 * However, deny permissions may ultimately be overridden
2617 * by secpolicy_vnode_access().
2619 * We will ask for all of the necessary permissions and then
2620 * look at the working modes from the directory and target object
2621 * to determine what was found.
2624 if (zp->z_pflags & (ZFS_IMMUTABLE | ZFS_NOUNLINK))
2629 * If the directory permissions allow the delete, we are done.
2631 if ((dzp_error = zfs_zaccess_common(dzp, ACE_DELETE_CHILD,
2632 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0)
2636 * If target object has delete permission then we are done
2638 if ((zp_error = zfs_zaccess_common(zp, ACE_DELETE, &zp_working_mode,
2639 &zpcheck_privs, B_FALSE, cr)) == 0)
2642 ASSERT(dzp_error && zp_error);
2644 if (!dzpcheck_privs)
2652 * If directory returns EACCES then delete_child was denied
2653 * due to deny delete_child. In this case send the request through
2654 * secpolicy_vnode_remove(). We don't use zfs_delete_final_check()
2655 * since that *could* allow the delete based on write/execute permission
2656 * and we want delete permissions to override write/execute.
2659 if (dzp_error == EACCES)
2660 return (secpolicy_vnode_remove(cr));
2664 * only need to see if we have write/execute on directory.
2667 dzp_error = zfs_zaccess_common(dzp, ACE_EXECUTE|ACE_WRITE_DATA,
2668 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr);
2670 if (dzp_error != 0 && !dzpcheck_privs)
2677 available_perms = (dzp_working_mode & ACE_WRITE_DATA) ? 0 : VWRITE;
2678 available_perms |= (dzp_working_mode & ACE_EXECUTE) ? 0 : VEXEC;
2680 return (zfs_delete_final_check(zp, dzp, available_perms, cr));
2685 zfs_zaccess_rename(znode_t *sdzp, znode_t *szp, znode_t *tdzp,
2686 znode_t *tzp, cred_t *cr)
2691 if (szp->z_pflags & ZFS_AV_QUARANTINED)
2694 add_perm = (ZTOV(szp)->v_type == VDIR) ?
2695 ACE_ADD_SUBDIRECTORY : ACE_ADD_FILE;
2698 * Rename permissions are combination of delete permission +
2699 * add file/subdir permission.
2703 * first make sure we do the delete portion.
2705 * If that succeeds then check for add_file/add_subdir permissions
2708 if (error = zfs_zaccess_delete(sdzp, szp, cr))
2712 * If we have a tzp, see if we can delete it?
2715 if (error = zfs_zaccess_delete(tdzp, tzp, cr))
2720 * Now check for add permissions
2722 error = zfs_zaccess(tdzp, add_perm, 0, B_FALSE, cr);