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 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
26 #include <sys/types.h>
27 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/sysmacros.h>
31 #include <sys/resource.h>
33 #include <sys/vnode.h>
38 #include <sys/cmn_err.h>
39 #include <sys/errno.h>
40 #include <sys/unistd.h>
42 #include <sys/fs/zfs.h>
44 #include <sys/policy.h>
45 #include <sys/zfs_znode.h>
46 #include <sys/zfs_fuid.h>
47 #include <sys/zfs_acl.h>
48 #include <sys/zfs_dir.h>
49 #include <sys/zfs_vfsops.h>
51 #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|\
97 zfs_ace_v0_get_type(void *acep)
99 return (((zfs_oldace_t *)acep)->z_type);
103 zfs_ace_v0_get_flags(void *acep)
105 return (((zfs_oldace_t *)acep)->z_flags);
109 zfs_ace_v0_get_mask(void *acep)
111 return (((zfs_oldace_t *)acep)->z_access_mask);
115 zfs_ace_v0_get_who(void *acep)
117 return (((zfs_oldace_t *)acep)->z_fuid);
121 zfs_ace_v0_set_type(void *acep, uint16_t type)
123 ((zfs_oldace_t *)acep)->z_type = type;
127 zfs_ace_v0_set_flags(void *acep, uint16_t flags)
129 ((zfs_oldace_t *)acep)->z_flags = flags;
133 zfs_ace_v0_set_mask(void *acep, uint32_t mask)
135 ((zfs_oldace_t *)acep)->z_access_mask = mask;
139 zfs_ace_v0_set_who(void *acep, uint64_t who)
141 ((zfs_oldace_t *)acep)->z_fuid = who;
146 zfs_ace_v0_size(void *acep)
148 return (sizeof (zfs_oldace_t));
152 zfs_ace_v0_abstract_size(void)
154 return (sizeof (zfs_oldace_t));
158 zfs_ace_v0_mask_off(void)
160 return (offsetof(zfs_oldace_t, z_access_mask));
165 zfs_ace_v0_data(void *acep, void **datap)
171 static acl_ops_t zfs_acl_v0_ops = {
174 zfs_ace_v0_get_flags,
175 zfs_ace_v0_set_flags,
181 zfs_ace_v0_abstract_size,
187 zfs_ace_fuid_get_type(void *acep)
189 return (((zfs_ace_hdr_t *)acep)->z_type);
193 zfs_ace_fuid_get_flags(void *acep)
195 return (((zfs_ace_hdr_t *)acep)->z_flags);
199 zfs_ace_fuid_get_mask(void *acep)
201 return (((zfs_ace_hdr_t *)acep)->z_access_mask);
205 zfs_ace_fuid_get_who(void *args)
208 zfs_ace_t *acep = args;
210 entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
212 if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
213 entry_type == ACE_EVERYONE)
215 return (((zfs_ace_t *)acep)->z_fuid);
219 zfs_ace_fuid_set_type(void *acep, uint16_t type)
221 ((zfs_ace_hdr_t *)acep)->z_type = type;
225 zfs_ace_fuid_set_flags(void *acep, uint16_t flags)
227 ((zfs_ace_hdr_t *)acep)->z_flags = flags;
231 zfs_ace_fuid_set_mask(void *acep, uint32_t mask)
233 ((zfs_ace_hdr_t *)acep)->z_access_mask = mask;
237 zfs_ace_fuid_set_who(void *arg, uint64_t who)
239 zfs_ace_t *acep = arg;
241 uint16_t entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
243 if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
244 entry_type == ACE_EVERYONE)
250 zfs_ace_fuid_size(void *acep)
252 zfs_ace_hdr_t *zacep = acep;
255 switch (zacep->z_type) {
256 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
257 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
258 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
259 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
260 return (sizeof (zfs_object_ace_t));
264 (((zfs_ace_hdr_t *)acep)->z_flags & ACE_TYPE_FLAGS);
265 if (entry_type == ACE_OWNER ||
266 entry_type == OWNING_GROUP ||
267 entry_type == ACE_EVERYONE)
268 return (sizeof (zfs_ace_hdr_t));
271 return (sizeof (zfs_ace_t));
276 zfs_ace_fuid_abstract_size(void)
278 return (sizeof (zfs_ace_hdr_t));
282 zfs_ace_fuid_mask_off(void)
284 return (offsetof(zfs_ace_hdr_t, z_access_mask));
288 zfs_ace_fuid_data(void *acep, void **datap)
290 zfs_ace_t *zacep = acep;
291 zfs_object_ace_t *zobjp;
293 switch (zacep->z_hdr.z_type) {
294 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
295 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
296 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
297 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
299 *datap = (caddr_t)zobjp + sizeof (zfs_ace_t);
300 return (sizeof (zfs_object_ace_t) - sizeof (zfs_ace_t));
307 static acl_ops_t zfs_acl_fuid_ops = {
308 zfs_ace_fuid_get_mask,
309 zfs_ace_fuid_set_mask,
310 zfs_ace_fuid_get_flags,
311 zfs_ace_fuid_set_flags,
312 zfs_ace_fuid_get_type,
313 zfs_ace_fuid_set_type,
314 zfs_ace_fuid_get_who,
315 zfs_ace_fuid_set_who,
317 zfs_ace_fuid_abstract_size,
318 zfs_ace_fuid_mask_off,
323 zfs_acl_version(int version)
325 if (version < ZPL_VERSION_FUID)
326 return (ZFS_ACL_VERSION_INITIAL);
328 return (ZFS_ACL_VERSION_FUID);
332 zfs_acl_version_zp(znode_t *zp)
334 return (zfs_acl_version(zp->z_zfsvfs->z_version));
338 zfs_acl_alloc(int vers)
342 aclp = kmem_zalloc(sizeof (zfs_acl_t), KM_SLEEP);
343 list_create(&aclp->z_acl, sizeof (zfs_acl_node_t),
344 offsetof(zfs_acl_node_t, z_next));
345 aclp->z_version = vers;
346 if (vers == ZFS_ACL_VERSION_FUID)
347 aclp->z_ops = zfs_acl_fuid_ops;
349 aclp->z_ops = zfs_acl_v0_ops;
353 static zfs_acl_node_t *
354 zfs_acl_node_alloc(size_t bytes)
356 zfs_acl_node_t *aclnode;
358 aclnode = kmem_zalloc(sizeof (zfs_acl_node_t), KM_SLEEP);
360 aclnode->z_acldata = kmem_alloc(bytes, KM_SLEEP);
361 aclnode->z_allocdata = aclnode->z_acldata;
362 aclnode->z_allocsize = bytes;
363 aclnode->z_size = bytes;
370 zfs_acl_node_free(zfs_acl_node_t *aclnode)
372 if (aclnode->z_allocsize)
373 kmem_free(aclnode->z_allocdata, aclnode->z_allocsize);
374 kmem_free(aclnode, sizeof (zfs_acl_node_t));
378 zfs_acl_release_nodes(zfs_acl_t *aclp)
380 zfs_acl_node_t *aclnode;
382 while (aclnode = list_head(&aclp->z_acl)) {
383 list_remove(&aclp->z_acl, aclnode);
384 zfs_acl_node_free(aclnode);
386 aclp->z_acl_count = 0;
387 aclp->z_acl_bytes = 0;
391 zfs_acl_free(zfs_acl_t *aclp)
393 zfs_acl_release_nodes(aclp);
394 list_destroy(&aclp->z_acl);
395 kmem_free(aclp, sizeof (zfs_acl_t));
399 zfs_acl_valid_ace_type(uint_t type, uint_t flags)
406 case ACE_SYSTEM_AUDIT_ACE_TYPE:
407 case ACE_SYSTEM_ALARM_ACE_TYPE:
408 entry_type = flags & ACE_TYPE_FLAGS;
409 return (entry_type == ACE_OWNER ||
410 entry_type == OWNING_GROUP ||
411 entry_type == ACE_EVERYONE || entry_type == 0 ||
412 entry_type == ACE_IDENTIFIER_GROUP);
414 if (type >= MIN_ACE_TYPE && type <= MAX_ACE_TYPE)
421 zfs_ace_valid(vtype_t obj_type, zfs_acl_t *aclp, uint16_t type, uint16_t iflags)
424 * first check type of entry
427 if (!zfs_acl_valid_ace_type(type, iflags))
431 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
432 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
433 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
434 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
435 if (aclp->z_version < ZFS_ACL_VERSION_FUID)
437 aclp->z_hints |= ZFS_ACL_OBJ_ACE;
441 * next check inheritance level flags
444 if (obj_type == VDIR &&
445 (iflags & (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE)))
446 aclp->z_hints |= ZFS_INHERIT_ACE;
448 if (iflags & (ACE_INHERIT_ONLY_ACE|ACE_NO_PROPAGATE_INHERIT_ACE)) {
449 if ((iflags & (ACE_FILE_INHERIT_ACE|
450 ACE_DIRECTORY_INHERIT_ACE)) == 0) {
459 zfs_acl_next_ace(zfs_acl_t *aclp, void *start, uint64_t *who,
460 uint32_t *access_mask, uint16_t *iflags, uint16_t *type)
462 zfs_acl_node_t *aclnode;
465 aclnode = list_head(&aclp->z_acl);
469 aclp->z_next_ace = aclnode->z_acldata;
470 aclp->z_curr_node = aclnode;
471 aclnode->z_ace_idx = 0;
474 aclnode = aclp->z_curr_node;
479 if (aclnode->z_ace_idx >= aclnode->z_ace_count) {
480 aclnode = list_next(&aclp->z_acl, aclnode);
484 aclp->z_curr_node = aclnode;
485 aclnode->z_ace_idx = 0;
486 aclp->z_next_ace = aclnode->z_acldata;
490 if (aclnode->z_ace_idx < aclnode->z_ace_count) {
491 void *acep = aclp->z_next_ace;
495 * Make sure we don't overstep our bounds
497 ace_size = aclp->z_ops.ace_size(acep);
499 if (((caddr_t)acep + ace_size) >
500 ((caddr_t)aclnode->z_acldata + aclnode->z_size)) {
504 *iflags = aclp->z_ops.ace_flags_get(acep);
505 *type = aclp->z_ops.ace_type_get(acep);
506 *access_mask = aclp->z_ops.ace_mask_get(acep);
507 *who = aclp->z_ops.ace_who_get(acep);
508 aclp->z_next_ace = (caddr_t)aclp->z_next_ace + ace_size;
509 aclnode->z_ace_idx++;
510 return ((void *)acep);
517 zfs_ace_walk(void *datap, uint64_t cookie, int aclcnt,
518 uint16_t *flags, uint16_t *type, uint32_t *mask)
520 zfs_acl_t *aclp = datap;
521 zfs_ace_hdr_t *acep = (zfs_ace_hdr_t *)(uintptr_t)cookie;
524 acep = zfs_acl_next_ace(aclp, acep, &who, mask,
526 return ((uint64_t)(uintptr_t)acep);
529 static zfs_acl_node_t *
530 zfs_acl_curr_node(zfs_acl_t *aclp)
532 ASSERT(aclp->z_curr_node);
533 return (aclp->z_curr_node);
537 * Copy ACE to internal ZFS format.
538 * While processing the ACL each ACE will be validated for correctness.
539 * ACE FUIDs will be created later.
542 zfs_copy_ace_2_fuid(zfsvfs_t *zfsvfs, vtype_t obj_type, zfs_acl_t *aclp,
543 void *datap, zfs_ace_t *z_acl, int aclcnt, size_t *size,
544 zfs_fuid_info_t **fuidp, cred_t *cr)
548 zfs_ace_t *aceptr = z_acl;
550 zfs_object_ace_t *zobjacep;
551 ace_object_t *aceobjp;
553 for (i = 0; i != aclcnt; i++) {
554 aceptr->z_hdr.z_access_mask = acep->a_access_mask;
555 aceptr->z_hdr.z_flags = acep->a_flags;
556 aceptr->z_hdr.z_type = acep->a_type;
557 entry_type = aceptr->z_hdr.z_flags & ACE_TYPE_FLAGS;
558 if (entry_type != ACE_OWNER && entry_type != OWNING_GROUP &&
559 entry_type != ACE_EVERYONE) {
560 aceptr->z_fuid = zfs_fuid_create(zfsvfs, acep->a_who,
561 cr, (entry_type == 0) ?
562 ZFS_ACE_USER : ZFS_ACE_GROUP, fuidp);
566 * Make sure ACE is valid
568 if (zfs_ace_valid(obj_type, aclp, aceptr->z_hdr.z_type,
569 aceptr->z_hdr.z_flags) != B_TRUE)
572 switch (acep->a_type) {
573 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
574 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
575 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
576 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
577 zobjacep = (zfs_object_ace_t *)aceptr;
578 aceobjp = (ace_object_t *)acep;
580 bcopy(aceobjp->a_obj_type, zobjacep->z_object_type,
581 sizeof (aceobjp->a_obj_type));
582 bcopy(aceobjp->a_inherit_obj_type,
583 zobjacep->z_inherit_type,
584 sizeof (aceobjp->a_inherit_obj_type));
585 acep = (ace_t *)((caddr_t)acep + sizeof (ace_object_t));
588 acep = (ace_t *)((caddr_t)acep + sizeof (ace_t));
591 aceptr = (zfs_ace_t *)((caddr_t)aceptr +
592 aclp->z_ops.ace_size(aceptr));
595 *size = (caddr_t)aceptr - (caddr_t)z_acl;
601 * Copy ZFS ACEs to fixed size ace_t layout
604 zfs_copy_fuid_2_ace(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, cred_t *cr,
605 void *datap, int filter)
608 uint32_t access_mask;
609 uint16_t iflags, type;
610 zfs_ace_hdr_t *zacep = NULL;
612 ace_object_t *objacep;
613 zfs_object_ace_t *zobjacep;
617 while (zacep = zfs_acl_next_ace(aclp, zacep,
618 &who, &access_mask, &iflags, &type)) {
621 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
622 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
623 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
624 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
628 zobjacep = (zfs_object_ace_t *)zacep;
629 objacep = (ace_object_t *)acep;
630 bcopy(zobjacep->z_object_type,
632 sizeof (zobjacep->z_object_type));
633 bcopy(zobjacep->z_inherit_type,
634 objacep->a_inherit_obj_type,
635 sizeof (zobjacep->z_inherit_type));
636 ace_size = sizeof (ace_object_t);
639 ace_size = sizeof (ace_t);
643 entry_type = (iflags & ACE_TYPE_FLAGS);
644 if ((entry_type != ACE_OWNER &&
645 entry_type != OWNING_GROUP &&
646 entry_type != ACE_EVERYONE)) {
647 acep->a_who = zfs_fuid_map_id(zfsvfs, who,
648 cr, (entry_type & ACE_IDENTIFIER_GROUP) ?
649 ZFS_ACE_GROUP : ZFS_ACE_USER);
651 acep->a_who = (uid_t)(int64_t)who;
653 acep->a_access_mask = access_mask;
654 acep->a_flags = iflags;
656 acep = (ace_t *)((caddr_t)acep + ace_size);
661 zfs_copy_ace_2_oldace(vtype_t obj_type, zfs_acl_t *aclp, ace_t *acep,
662 zfs_oldace_t *z_acl, int aclcnt, size_t *size)
665 zfs_oldace_t *aceptr = z_acl;
667 for (i = 0; i != aclcnt; i++, aceptr++) {
668 aceptr->z_access_mask = acep[i].a_access_mask;
669 aceptr->z_type = acep[i].a_type;
670 aceptr->z_flags = acep[i].a_flags;
671 aceptr->z_fuid = acep[i].a_who;
673 * Make sure ACE is valid
675 if (zfs_ace_valid(obj_type, aclp, aceptr->z_type,
676 aceptr->z_flags) != B_TRUE)
679 *size = (caddr_t)aceptr - (caddr_t)z_acl;
684 * convert old ACL format to new
687 zfs_acl_xform(znode_t *zp, zfs_acl_t *aclp, cred_t *cr)
689 zfs_oldace_t *oldaclp;
691 uint16_t type, iflags;
692 uint32_t access_mask;
695 zfs_acl_node_t *newaclnode;
697 ASSERT(aclp->z_version == ZFS_ACL_VERSION_INITIAL);
699 * First create the ACE in a contiguous piece of memory
700 * for zfs_copy_ace_2_fuid().
702 * We only convert an ACL once, so this won't happen
705 oldaclp = kmem_alloc(sizeof (zfs_oldace_t) * aclp->z_acl_count,
708 while (cookie = zfs_acl_next_ace(aclp, cookie, &who,
709 &access_mask, &iflags, &type)) {
710 oldaclp[i].z_flags = iflags;
711 oldaclp[i].z_type = type;
712 oldaclp[i].z_fuid = who;
713 oldaclp[i++].z_access_mask = access_mask;
716 newaclnode = zfs_acl_node_alloc(aclp->z_acl_count *
717 sizeof (zfs_object_ace_t));
718 aclp->z_ops = zfs_acl_fuid_ops;
719 VERIFY(zfs_copy_ace_2_fuid(zp->z_zfsvfs, ZTOV(zp)->v_type, aclp,
720 oldaclp, newaclnode->z_acldata, aclp->z_acl_count,
721 &newaclnode->z_size, NULL, cr) == 0);
722 newaclnode->z_ace_count = aclp->z_acl_count;
723 aclp->z_version = ZFS_ACL_VERSION;
724 kmem_free(oldaclp, aclp->z_acl_count * sizeof (zfs_oldace_t));
727 * Release all previous ACL nodes
730 zfs_acl_release_nodes(aclp);
732 list_insert_head(&aclp->z_acl, newaclnode);
734 aclp->z_acl_bytes = newaclnode->z_size;
735 aclp->z_acl_count = newaclnode->z_ace_count;
740 * Convert unix access mask to v4 access mask
743 zfs_unix_to_v4(uint32_t access_mask)
745 uint32_t new_mask = 0;
747 if (access_mask & S_IXOTH)
748 new_mask |= ACE_EXECUTE;
749 if (access_mask & S_IWOTH)
750 new_mask |= ACE_WRITE_DATA;
751 if (access_mask & S_IROTH)
752 new_mask |= ACE_READ_DATA;
757 zfs_set_ace(zfs_acl_t *aclp, void *acep, uint32_t access_mask,
758 uint16_t access_type, uint64_t fuid, uint16_t entry_type)
760 uint16_t type = entry_type & ACE_TYPE_FLAGS;
762 aclp->z_ops.ace_mask_set(acep, access_mask);
763 aclp->z_ops.ace_type_set(acep, access_type);
764 aclp->z_ops.ace_flags_set(acep, entry_type);
765 if ((type != ACE_OWNER && type != OWNING_GROUP &&
766 type != ACE_EVERYONE))
767 aclp->z_ops.ace_who_set(acep, fuid);
771 * Determine mode of file based on ACL.
772 * Also, create FUIDs for any User/Group ACEs
775 zfs_mode_compute(znode_t *zp, zfs_acl_t *aclp)
780 zfs_ace_hdr_t *acep = NULL;
782 uint16_t iflags, type;
783 uint32_t access_mask;
785 mode = (zp->z_phys->zp_mode & (S_IFMT | S_ISUID | S_ISGID | S_ISVTX));
787 while (acep = zfs_acl_next_ace(aclp, acep, &who,
788 &access_mask, &iflags, &type)) {
790 if (!zfs_acl_valid_ace_type(type, iflags))
793 entry_type = (iflags & ACE_TYPE_FLAGS);
796 * Skip over owner@, group@ or everyone@ inherit only ACEs
798 if ((iflags & ACE_INHERIT_ONLY_ACE) &&
799 (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
800 entry_type == OWNING_GROUP))
803 if (entry_type == ACE_OWNER) {
804 if ((access_mask & ACE_READ_DATA) &&
805 (!(seen & S_IRUSR))) {
811 if ((access_mask & ACE_WRITE_DATA) &&
812 (!(seen & S_IWUSR))) {
818 if ((access_mask & ACE_EXECUTE) &&
819 (!(seen & S_IXUSR))) {
825 } else if (entry_type == OWNING_GROUP) {
826 if ((access_mask & ACE_READ_DATA) &&
827 (!(seen & S_IRGRP))) {
833 if ((access_mask & ACE_WRITE_DATA) &&
834 (!(seen & S_IWGRP))) {
840 if ((access_mask & ACE_EXECUTE) &&
841 (!(seen & S_IXGRP))) {
847 } else if (entry_type == ACE_EVERYONE) {
848 if ((access_mask & ACE_READ_DATA)) {
849 if (!(seen & S_IRUSR)) {
855 if (!(seen & S_IRGRP)) {
861 if (!(seen & S_IROTH)) {
868 if ((access_mask & ACE_WRITE_DATA)) {
869 if (!(seen & S_IWUSR)) {
875 if (!(seen & S_IWGRP)) {
881 if (!(seen & S_IWOTH)) {
888 if ((access_mask & ACE_EXECUTE)) {
889 if (!(seen & S_IXUSR)) {
895 if (!(seen & S_IXGRP)) {
901 if (!(seen & S_IXOTH)) {
914 zfs_acl_node_read_internal(znode_t *zp, boolean_t will_modify)
917 zfs_acl_node_t *aclnode;
919 aclp = zfs_acl_alloc(zp->z_phys->zp_acl.z_acl_version);
922 * Version 0 to 1 znode_acl_phys has the size/count fields swapped.
923 * Version 0 didn't have a size field, only a count.
925 if (zp->z_phys->zp_acl.z_acl_version == ZFS_ACL_VERSION_INITIAL) {
926 aclp->z_acl_count = zp->z_phys->zp_acl.z_acl_size;
927 aclp->z_acl_bytes = ZFS_ACL_SIZE(aclp->z_acl_count);
929 aclp->z_acl_count = zp->z_phys->zp_acl.z_acl_count;
930 aclp->z_acl_bytes = zp->z_phys->zp_acl.z_acl_size;
933 aclnode = zfs_acl_node_alloc(will_modify ? aclp->z_acl_bytes : 0);
934 aclnode->z_ace_count = aclp->z_acl_count;
936 bcopy(zp->z_phys->zp_acl.z_ace_data, aclnode->z_acldata,
939 aclnode->z_size = aclp->z_acl_bytes;
940 aclnode->z_acldata = &zp->z_phys->zp_acl.z_ace_data[0];
943 list_insert_head(&aclp->z_acl, aclnode);
949 * Read an external acl object.
952 zfs_acl_node_read(znode_t *zp, zfs_acl_t **aclpp, boolean_t will_modify)
954 uint64_t extacl = zp->z_phys->zp_acl.z_acl_extern_obj;
958 zfs_acl_node_t *aclnode;
961 ASSERT(MUTEX_HELD(&zp->z_acl_lock));
963 if (zp->z_phys->zp_acl.z_acl_extern_obj == 0) {
964 *aclpp = zfs_acl_node_read_internal(zp, will_modify);
968 aclp = zfs_acl_alloc(zp->z_phys->zp_acl.z_acl_version);
969 if (zp->z_phys->zp_acl.z_acl_version == ZFS_ACL_VERSION_INITIAL) {
970 zfs_acl_phys_v0_t *zacl0 =
971 (zfs_acl_phys_v0_t *)&zp->z_phys->zp_acl;
973 aclsize = ZFS_ACL_SIZE(zacl0->z_acl_count);
974 acl_count = zacl0->z_acl_count;
976 aclsize = zp->z_phys->zp_acl.z_acl_size;
977 acl_count = zp->z_phys->zp_acl.z_acl_count;
979 aclsize = acl_count * sizeof (zfs_ace_t);
981 aclnode = zfs_acl_node_alloc(aclsize);
982 list_insert_head(&aclp->z_acl, aclnode);
983 error = dmu_read(zp->z_zfsvfs->z_os, extacl, 0,
984 aclsize, aclnode->z_acldata, DMU_READ_PREFETCH);
985 aclnode->z_ace_count = acl_count;
986 aclp->z_acl_count = acl_count;
987 aclp->z_acl_bytes = aclsize;
991 /* convert checksum errors into IO errors */
1002 * common code for setting ACLs.
1004 * This function is called from zfs_mode_update, zfs_perm_init, and zfs_setacl.
1005 * zfs_setacl passes a non-NULL inherit pointer (ihp) to indicate that it's
1006 * already checked the acl and knows whether to inherit.
1009 zfs_aclset_common(znode_t *zp, zfs_acl_t *aclp, cred_t *cr, dmu_tx_t *tx)
1012 znode_phys_t *zphys = zp->z_phys;
1013 zfs_acl_phys_t *zacl = &zphys->zp_acl;
1014 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1015 uint64_t aoid = zphys->zp_acl.z_acl_extern_obj;
1017 dmu_object_type_t otype;
1018 zfs_acl_node_t *aclnode;
1020 dmu_buf_will_dirty(zp->z_dbuf, tx);
1022 zphys->zp_mode = zfs_mode_compute(zp, aclp);
1025 * Decide which opbject type to use. If we are forced to
1026 * use old ACL format than transform ACL into zfs_oldace_t
1029 if (!zfsvfs->z_use_fuids) {
1030 otype = DMU_OT_OLDACL;
1032 if ((aclp->z_version == ZFS_ACL_VERSION_INITIAL) &&
1033 (zfsvfs->z_version >= ZPL_VERSION_FUID))
1034 zfs_acl_xform(zp, aclp, cr);
1035 ASSERT(aclp->z_version >= ZFS_ACL_VERSION_FUID);
1039 if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
1041 * If ACL was previously external and we are now
1042 * converting to new ACL format then release old
1043 * ACL object and create a new one.
1045 if (aoid && aclp->z_version != zacl->z_acl_version) {
1046 error = dmu_object_free(zfsvfs->z_os,
1047 zp->z_phys->zp_acl.z_acl_extern_obj, tx);
1053 aoid = dmu_object_alloc(zfsvfs->z_os,
1054 otype, aclp->z_acl_bytes,
1055 otype == DMU_OT_ACL ? DMU_OT_SYSACL : DMU_OT_NONE,
1056 otype == DMU_OT_ACL ? DN_MAX_BONUSLEN : 0, tx);
1058 (void) dmu_object_set_blocksize(zfsvfs->z_os, aoid,
1059 aclp->z_acl_bytes, 0, tx);
1061 zphys->zp_acl.z_acl_extern_obj = aoid;
1062 for (aclnode = list_head(&aclp->z_acl); aclnode;
1063 aclnode = list_next(&aclp->z_acl, aclnode)) {
1064 if (aclnode->z_ace_count == 0)
1066 dmu_write(zfsvfs->z_os, aoid, off,
1067 aclnode->z_size, aclnode->z_acldata, tx);
1068 off += aclnode->z_size;
1071 void *start = zacl->z_ace_data;
1073 * Migrating back embedded?
1075 if (zphys->zp_acl.z_acl_extern_obj) {
1076 error = dmu_object_free(zfsvfs->z_os,
1077 zp->z_phys->zp_acl.z_acl_extern_obj, tx);
1080 zphys->zp_acl.z_acl_extern_obj = 0;
1083 for (aclnode = list_head(&aclp->z_acl); aclnode;
1084 aclnode = list_next(&aclp->z_acl, aclnode)) {
1085 if (aclnode->z_ace_count == 0)
1087 bcopy(aclnode->z_acldata, start, aclnode->z_size);
1088 start = (caddr_t)start + aclnode->z_size;
1093 * If Old version then swap count/bytes to match old
1094 * layout of znode_acl_phys_t.
1096 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
1097 zphys->zp_acl.z_acl_size = aclp->z_acl_count;
1098 zphys->zp_acl.z_acl_count = aclp->z_acl_bytes;
1100 zphys->zp_acl.z_acl_size = aclp->z_acl_bytes;
1101 zphys->zp_acl.z_acl_count = aclp->z_acl_count;
1104 zphys->zp_acl.z_acl_version = aclp->z_version;
1107 * Replace ACL wide bits, but first clear them.
1109 zp->z_phys->zp_flags &= ~ZFS_ACL_WIDE_FLAGS;
1111 zp->z_phys->zp_flags |= aclp->z_hints;
1113 if (ace_trivial_common(aclp, 0, zfs_ace_walk) == 0)
1114 zp->z_phys->zp_flags |= ZFS_ACL_TRIVIAL;
1120 * Update access mask for prepended ACE
1122 * This applies the "groupmask" value for aclmode property.
1125 zfs_acl_prepend_fixup(zfs_acl_t *aclp, void *acep, void *origacep,
1126 mode_t mode, uint64_t owner)
1128 int rmask, wmask, xmask;
1131 uint32_t origmask, acepmask;
1134 aceflags = aclp->z_ops.ace_flags_get(acep);
1135 fuid = aclp->z_ops.ace_who_get(acep);
1136 origmask = aclp->z_ops.ace_mask_get(origacep);
1137 acepmask = aclp->z_ops.ace_mask_get(acep);
1139 user_ace = (!(aceflags &
1140 (ACE_OWNER|ACE_GROUP|ACE_IDENTIFIER_GROUP)));
1142 if (user_ace && (fuid == owner)) {
1152 if (origmask & ACE_READ_DATA) {
1154 acepmask &= ~ACE_READ_DATA;
1156 acepmask |= ACE_READ_DATA;
1160 if (origmask & ACE_WRITE_DATA) {
1162 acepmask &= ~ACE_WRITE_DATA;
1164 acepmask |= ACE_WRITE_DATA;
1168 if (origmask & ACE_APPEND_DATA) {
1170 acepmask &= ~ACE_APPEND_DATA;
1172 acepmask |= ACE_APPEND_DATA;
1176 if (origmask & ACE_EXECUTE) {
1178 acepmask &= ~ACE_EXECUTE;
1180 acepmask |= ACE_EXECUTE;
1183 aclp->z_ops.ace_mask_set(acep, acepmask);
1187 * Apply mode to canonical six ACEs.
1190 zfs_acl_fixup_canonical_six(zfs_acl_t *aclp, mode_t mode)
1192 zfs_acl_node_t *aclnode = list_tail(&aclp->z_acl);
1194 int maskoff = aclp->z_ops.ace_mask_off();
1195 size_t abstract_size = aclp->z_ops.ace_abstract_size();
1197 ASSERT(aclnode != NULL);
1199 acep = (void *)((caddr_t)aclnode->z_acldata +
1200 aclnode->z_size - (abstract_size * 6));
1203 * Fixup final ACEs to match the mode
1206 adjust_ace_pair_common(acep, maskoff, abstract_size,
1207 (mode & 0700) >> 6); /* owner@ */
1209 acep = (caddr_t)acep + (abstract_size * 2);
1211 adjust_ace_pair_common(acep, maskoff, abstract_size,
1212 (mode & 0070) >> 3); /* group@ */
1214 acep = (caddr_t)acep + (abstract_size * 2);
1215 adjust_ace_pair_common(acep, maskoff,
1216 abstract_size, mode); /* everyone@ */
1221 zfs_acl_ace_match(zfs_acl_t *aclp, void *acep, int allow_deny,
1222 int entry_type, int accessmask)
1224 uint32_t mask = aclp->z_ops.ace_mask_get(acep);
1225 uint16_t type = aclp->z_ops.ace_type_get(acep);
1226 uint16_t flags = aclp->z_ops.ace_flags_get(acep);
1228 return (mask == accessmask && type == allow_deny &&
1229 ((flags & ACE_TYPE_FLAGS) == entry_type));
1233 * Can prepended ACE be reused?
1236 zfs_reuse_deny(zfs_acl_t *aclp, void *acep, void *prevacep)
1242 uint32_t mask, prevmask;
1244 if (prevacep == NULL)
1247 prevtype = aclp->z_ops.ace_type_get(prevacep);
1248 prevflags = aclp->z_ops.ace_flags_get(prevacep);
1249 flags = aclp->z_ops.ace_flags_get(acep);
1250 mask = aclp->z_ops.ace_mask_get(acep);
1251 prevmask = aclp->z_ops.ace_mask_get(prevacep);
1253 if (prevtype != DENY)
1256 if (prevflags != (flags & ACE_IDENTIFIER_GROUP))
1259 okay_masks = (mask & OKAY_MASK_BITS);
1261 if (prevmask & ~okay_masks)
1269 * Insert new ACL node into chain of zfs_acl_node_t's
1271 * This will result in two possible results.
1272 * 1. If the ACL is currently just a single zfs_acl_node and
1273 * we are prepending the entry then current acl node will have
1274 * a new node inserted above it.
1276 * 2. If we are inserting in the middle of current acl node then
1277 * the current node will be split in two and new node will be inserted
1278 * in between the two split nodes.
1280 static zfs_acl_node_t *
1281 zfs_acl_ace_insert(zfs_acl_t *aclp, void *acep)
1283 zfs_acl_node_t *newnode;
1284 zfs_acl_node_t *trailernode = NULL;
1285 zfs_acl_node_t *currnode = zfs_acl_curr_node(aclp);
1286 int curr_idx = aclp->z_curr_node->z_ace_idx;
1290 newnode = zfs_acl_node_alloc(aclp->z_ops.ace_size(acep));
1291 newnode->z_ace_count = 1;
1293 oldsize = currnode->z_size;
1295 if (curr_idx != 1) {
1296 trailernode = zfs_acl_node_alloc(0);
1297 trailernode->z_acldata = acep;
1299 trailer_count = currnode->z_ace_count - curr_idx + 1;
1300 currnode->z_ace_count = curr_idx - 1;
1301 currnode->z_size = (caddr_t)acep - (caddr_t)currnode->z_acldata;
1302 trailernode->z_size = oldsize - currnode->z_size;
1303 trailernode->z_ace_count = trailer_count;
1306 aclp->z_acl_count += 1;
1307 aclp->z_acl_bytes += aclp->z_ops.ace_size(acep);
1310 list_insert_before(&aclp->z_acl, currnode, newnode);
1312 list_insert_after(&aclp->z_acl, currnode, newnode);
1314 list_insert_after(&aclp->z_acl, newnode, trailernode);
1315 aclp->z_curr_node = trailernode;
1316 trailernode->z_ace_idx = 1;
1326 zfs_acl_prepend_deny(uint64_t uid, zfs_acl_t *aclp, void *acep,
1329 zfs_acl_node_t *aclnode;
1334 aclnode = zfs_acl_ace_insert(aclp, acep);
1335 newacep = aclnode->z_acldata;
1336 fuid = aclp->z_ops.ace_who_get(acep);
1337 flags = aclp->z_ops.ace_flags_get(acep);
1338 zfs_set_ace(aclp, newacep, 0, DENY, fuid, (flags & ACE_TYPE_FLAGS));
1339 zfs_acl_prepend_fixup(aclp, newacep, acep, mode, uid);
1345 * Split an inherited ACE into inherit_only ACE
1346 * and original ACE with inheritance flags stripped off.
1349 zfs_acl_split_ace(zfs_acl_t *aclp, zfs_ace_hdr_t *acep)
1351 zfs_acl_node_t *aclnode;
1352 zfs_acl_node_t *currnode;
1354 uint16_t type, flags;
1358 type = aclp->z_ops.ace_type_get(acep);
1359 flags = aclp->z_ops.ace_flags_get(acep);
1360 mask = aclp->z_ops.ace_mask_get(acep);
1361 fuid = aclp->z_ops.ace_who_get(acep);
1363 aclnode = zfs_acl_ace_insert(aclp, acep);
1364 newacep = aclnode->z_acldata;
1366 aclp->z_ops.ace_type_set(newacep, type);
1367 aclp->z_ops.ace_flags_set(newacep, flags | ACE_INHERIT_ONLY_ACE);
1368 aclp->z_ops.ace_mask_set(newacep, mask);
1369 aclp->z_ops.ace_type_set(newacep, type);
1370 aclp->z_ops.ace_who_set(newacep, fuid);
1371 aclp->z_next_ace = acep;
1372 flags &= ~ALL_INHERIT;
1373 aclp->z_ops.ace_flags_set(acep, flags);
1374 currnode = zfs_acl_curr_node(aclp);
1375 ASSERT(currnode->z_ace_idx >= 1);
1376 currnode->z_ace_idx -= 1;
1380 * Are ACES started at index i, the canonical six ACES?
1383 zfs_have_canonical_six(zfs_acl_t *aclp)
1386 zfs_acl_node_t *aclnode = list_tail(&aclp->z_acl);
1388 size_t abstract_size = aclp->z_ops.ace_abstract_size();
1390 ASSERT(aclnode != NULL);
1392 if (aclnode->z_ace_count < 6)
1395 acep = (void *)((caddr_t)aclnode->z_acldata +
1396 aclnode->z_size - (aclp->z_ops.ace_abstract_size() * 6));
1398 if ((zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
1399 DENY, ACE_OWNER, 0) &&
1400 zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
1401 ALLOW, ACE_OWNER, OWNER_ALLOW_MASK) &&
1402 zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++), DENY,
1403 OWNING_GROUP, 0) && zfs_acl_ace_match(aclp, (caddr_t)acep +
1404 (abstract_size * i++),
1405 ALLOW, OWNING_GROUP, 0) &&
1406 zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
1407 DENY, ACE_EVERYONE, EVERYONE_DENY_MASK) &&
1408 zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
1409 ALLOW, ACE_EVERYONE, EVERYONE_ALLOW_MASK))) {
1418 * Apply step 1g, to group entries
1420 * Need to deal with corner case where group may have
1421 * greater permissions than owner. If so then limit
1422 * group permissions, based on what extra permissions
1426 zfs_fixup_group_entries(zfs_acl_t *aclp, void *acep, void *prevacep,
1429 uint32_t prevmask = aclp->z_ops.ace_mask_get(prevacep);
1430 uint32_t mask = aclp->z_ops.ace_mask_get(acep);
1431 uint16_t prevflags = aclp->z_ops.ace_flags_get(prevacep);
1432 mode_t extramode = (mode >> 3) & 07;
1433 mode_t ownermode = (mode >> 6);
1435 if (prevflags & ACE_IDENTIFIER_GROUP) {
1437 extramode &= ~ownermode;
1440 if (extramode & S_IROTH) {
1441 prevmask &= ~ACE_READ_DATA;
1442 mask &= ~ACE_READ_DATA;
1444 if (extramode & S_IWOTH) {
1445 prevmask &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
1446 mask &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
1448 if (extramode & S_IXOTH) {
1449 prevmask &= ~ACE_EXECUTE;
1450 mask &= ~ACE_EXECUTE;
1454 aclp->z_ops.ace_mask_set(acep, mask);
1455 aclp->z_ops.ace_mask_set(prevacep, prevmask);
1459 * Apply the chmod algorithm as described
1463 zfs_acl_chmod(zfsvfs_t *zfsvfs, uint64_t uid,
1464 uint64_t mode, zfs_acl_t *aclp)
1466 void *acep = NULL, *prevacep = NULL;
1471 int need_canonical_six = 1;
1472 uint16_t iflags, type;
1473 uint32_t access_mask;
1476 * If discard then just discard all ACL nodes which
1477 * represent the ACEs.
1479 * New owner@/group@/everone@ ACEs will be added
1482 if (zfsvfs->z_acl_mode == ZFS_ACL_DISCARD)
1483 zfs_acl_release_nodes(aclp);
1485 while (acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
1488 entry_type = (iflags & ACE_TYPE_FLAGS);
1489 iflags = (iflags & ALL_INHERIT);
1491 if ((type != ALLOW && type != DENY) ||
1492 (iflags & ACE_INHERIT_ONLY_ACE)) {
1494 aclp->z_hints |= ZFS_INHERIT_ACE;
1496 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1497 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1498 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1499 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
1500 aclp->z_hints |= ZFS_ACL_OBJ_ACE;
1507 * Need to split ace into two?
1509 if ((iflags & (ACE_FILE_INHERIT_ACE|
1510 ACE_DIRECTORY_INHERIT_ACE)) &&
1511 (!(iflags & ACE_INHERIT_ONLY_ACE))) {
1512 zfs_acl_split_ace(aclp, acep);
1513 aclp->z_hints |= ZFS_INHERIT_ACE;
1517 if (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
1518 (entry_type == OWNING_GROUP)) {
1519 access_mask &= ~OGE_CLEAR;
1520 aclp->z_ops.ace_mask_set(acep, access_mask);
1523 reuse_deny = B_TRUE;
1524 if (type == ALLOW) {
1527 * Check preceding ACE if any, to see
1528 * if we need to prepend a DENY ACE.
1529 * This is only applicable when the acl_mode
1530 * property == groupmask.
1532 if (zfsvfs->z_acl_mode == ZFS_ACL_GROUPMASK) {
1534 reuse_deny = zfs_reuse_deny(aclp, acep,
1539 zfs_acl_prepend_deny(uid,
1542 zfs_acl_prepend_fixup(
1546 zfs_fixup_group_entries(aclp, acep,
1556 * Check out last six aces, if we have six.
1559 if (aclp->z_acl_count >= 6) {
1560 if (zfs_have_canonical_six(aclp)) {
1561 need_canonical_six = 0;
1565 if (need_canonical_six) {
1566 size_t abstract_size = aclp->z_ops.ace_abstract_size();
1568 zfs_acl_node_t *aclnode =
1569 zfs_acl_node_alloc(abstract_size * 6);
1571 aclnode->z_size = abstract_size * 6;
1572 aclnode->z_ace_count = 6;
1573 aclp->z_acl_bytes += aclnode->z_size;
1574 list_insert_tail(&aclp->z_acl, aclnode);
1576 zacep = aclnode->z_acldata;
1579 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
1580 0, DENY, -1, ACE_OWNER);
1581 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
1582 OWNER_ALLOW_MASK, ALLOW, -1, ACE_OWNER);
1583 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++), 0,
1584 DENY, -1, OWNING_GROUP);
1585 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++), 0,
1586 ALLOW, -1, OWNING_GROUP);
1587 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
1588 EVERYONE_DENY_MASK, DENY, -1, ACE_EVERYONE);
1589 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
1590 EVERYONE_ALLOW_MASK, ALLOW, -1, ACE_EVERYONE);
1591 aclp->z_acl_count += 6;
1594 zfs_acl_fixup_canonical_six(aclp, mode);
1598 zfs_acl_chmod_setattr(znode_t *zp, zfs_acl_t **aclp, uint64_t mode)
1602 mutex_enter(&zp->z_lock);
1603 mutex_enter(&zp->z_acl_lock);
1605 error = zfs_acl_node_read(zp, aclp, B_TRUE);
1607 (*aclp)->z_hints = zp->z_phys->zp_flags & V4_ACL_WIDE_FLAGS;
1608 zfs_acl_chmod(zp->z_zfsvfs, zp->z_phys->zp_uid, mode, *aclp);
1610 mutex_exit(&zp->z_acl_lock);
1611 mutex_exit(&zp->z_lock);
1616 * strip off write_owner and write_acl
1619 zfs_restricted_update(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, void *acep)
1621 uint32_t mask = aclp->z_ops.ace_mask_get(acep);
1623 if ((zfsvfs->z_acl_inherit == ZFS_ACL_RESTRICTED) &&
1624 (aclp->z_ops.ace_type_get(acep) == ALLOW)) {
1625 mask &= ~RESTRICTED_CLEAR;
1626 aclp->z_ops.ace_mask_set(acep, mask);
1631 * Should ACE be inherited?
1634 zfs_ace_can_use(vtype_t vtype, uint16_t acep_flags)
1636 int iflags = (acep_flags & 0xf);
1638 if ((vtype == VDIR) && (iflags & ACE_DIRECTORY_INHERIT_ACE))
1640 else if (iflags & ACE_FILE_INHERIT_ACE)
1641 return (!((vtype == VDIR) &&
1642 (iflags & ACE_NO_PROPAGATE_INHERIT_ACE)));
1647 * inherit inheritable ACEs from parent
1650 zfs_acl_inherit(zfsvfs_t *zfsvfs, vtype_t vtype, zfs_acl_t *paclp,
1651 uint64_t mode, boolean_t *need_chmod)
1655 zfs_acl_node_t *aclnode, *aclnode2;
1656 zfs_acl_t *aclp = NULL;
1658 uint32_t access_mask;
1659 uint16_t iflags, newflags, type;
1661 void *data1, *data2;
1662 size_t data1sz, data2sz;
1663 boolean_t vdir = vtype == VDIR;
1664 boolean_t vreg = vtype == VREG;
1665 boolean_t passthrough, passthrough_x, noallow;
1668 zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH_X;
1669 passthrough = passthrough_x ||
1670 zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH;
1672 zfsvfs->z_acl_inherit == ZFS_ACL_NOALLOW;
1674 *need_chmod = B_TRUE;
1676 aclp = zfs_acl_alloc(paclp->z_version);
1677 if (zfsvfs->z_acl_inherit == ZFS_ACL_DISCARD)
1679 while (pacep = zfs_acl_next_ace(paclp, pacep, &who,
1680 &access_mask, &iflags, &type)) {
1683 * don't inherit bogus ACEs
1685 if (!zfs_acl_valid_ace_type(type, iflags))
1688 if (noallow && type == ALLOW)
1691 ace_size = aclp->z_ops.ace_size(pacep);
1693 if (!zfs_ace_can_use(vtype, iflags))
1697 * If owner@, group@, or everyone@ inheritable
1698 * then zfs_acl_chmod() isn't needed.
1701 ((iflags & (ACE_OWNER|ACE_EVERYONE)) ||
1702 ((iflags & OWNING_GROUP) ==
1703 OWNING_GROUP)) && (vreg || (vdir && (iflags &
1704 ACE_DIRECTORY_INHERIT_ACE)))) {
1705 *need_chmod = B_FALSE;
1707 if (!vdir && passthrough_x &&
1708 ((mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0)) {
1709 access_mask &= ~ACE_EXECUTE;
1713 aclnode = zfs_acl_node_alloc(ace_size);
1714 list_insert_tail(&aclp->z_acl, aclnode);
1715 acep = aclnode->z_acldata;
1717 zfs_set_ace(aclp, acep, access_mask, type,
1718 who, iflags|ACE_INHERITED_ACE);
1721 * Copy special opaque data if any
1723 if ((data1sz = paclp->z_ops.ace_data(pacep, &data1)) != 0) {
1724 VERIFY((data2sz = aclp->z_ops.ace_data(acep,
1725 &data2)) == data1sz);
1726 bcopy(data1, data2, data2sz);
1728 aclp->z_acl_count++;
1729 aclnode->z_ace_count++;
1730 aclp->z_acl_bytes += aclnode->z_size;
1731 newflags = aclp->z_ops.ace_flags_get(acep);
1734 aclp->z_hints |= ZFS_INHERIT_ACE;
1736 if ((iflags & ACE_NO_PROPAGATE_INHERIT_ACE) || !vdir) {
1737 newflags &= ~ALL_INHERIT;
1738 aclp->z_ops.ace_flags_set(acep,
1739 newflags|ACE_INHERITED_ACE);
1740 zfs_restricted_update(zfsvfs, aclp, acep);
1746 newflags = aclp->z_ops.ace_flags_get(acep);
1747 if ((iflags & (ACE_FILE_INHERIT_ACE |
1748 ACE_DIRECTORY_INHERIT_ACE)) !=
1749 ACE_FILE_INHERIT_ACE) {
1750 aclnode2 = zfs_acl_node_alloc(ace_size);
1751 list_insert_tail(&aclp->z_acl, aclnode2);
1752 acep2 = aclnode2->z_acldata;
1753 zfs_set_ace(aclp, acep2,
1754 access_mask, type, who,
1755 iflags|ACE_INHERITED_ACE);
1756 newflags |= ACE_INHERIT_ONLY_ACE;
1757 aclp->z_ops.ace_flags_set(acep, newflags);
1758 newflags &= ~ALL_INHERIT;
1759 aclp->z_ops.ace_flags_set(acep2,
1760 newflags|ACE_INHERITED_ACE);
1763 * Copy special opaque data if any
1765 if ((data1sz = aclp->z_ops.ace_data(acep,
1768 aclp->z_ops.ace_data(acep2,
1769 &data2)) == data1sz);
1770 bcopy(data1, data2, data1sz);
1772 aclp->z_acl_count++;
1773 aclnode2->z_ace_count++;
1774 aclp->z_acl_bytes += aclnode->z_size;
1775 zfs_restricted_update(zfsvfs, aclp, acep2);
1777 newflags |= ACE_INHERIT_ONLY_ACE;
1778 aclp->z_ops.ace_flags_set(acep,
1779 newflags|ACE_INHERITED_ACE);
1786 * Create file system object initial permissions
1787 * including inheritable ACEs.
1790 zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
1791 vsecattr_t *vsecp, zfs_acl_ids_t *acl_ids)
1794 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
1797 boolean_t need_chmod = B_TRUE;
1799 bzero(acl_ids, sizeof (zfs_acl_ids_t));
1800 acl_ids->z_mode = MAKEIMODE(vap->va_type, vap->va_mode);
1803 if ((error = zfs_vsec_2_aclp(zfsvfs, vap->va_type, vsecp, cr,
1804 &acl_ids->z_fuidp, &acl_ids->z_aclp)) != 0)
1808 * Determine uid and gid.
1810 if ((flag & (IS_ROOT_NODE | IS_REPLAY)) ||
1811 ((flag & IS_XATTR) && (vap->va_type == VDIR))) {
1812 acl_ids->z_fuid = zfs_fuid_create(zfsvfs,
1813 (uint64_t)vap->va_uid, cr,
1814 ZFS_OWNER, &acl_ids->z_fuidp);
1815 acl_ids->z_fgid = zfs_fuid_create(zfsvfs,
1816 (uint64_t)vap->va_gid, cr,
1817 ZFS_GROUP, &acl_ids->z_fuidp);
1820 acl_ids->z_fuid = zfs_fuid_create_cred(zfsvfs, ZFS_OWNER,
1821 cr, &acl_ids->z_fuidp);
1822 acl_ids->z_fgid = 0;
1823 if (vap->va_mask & AT_GID) {
1824 acl_ids->z_fgid = zfs_fuid_create(zfsvfs,
1825 (uint64_t)vap->va_gid,
1826 cr, ZFS_GROUP, &acl_ids->z_fuidp);
1828 if (acl_ids->z_fgid != dzp->z_phys->zp_gid &&
1829 !groupmember(vap->va_gid, cr) &&
1830 secpolicy_vnode_create_gid(cr) != 0)
1831 acl_ids->z_fgid = 0;
1833 if (acl_ids->z_fgid == 0) {
1834 if (dzp->z_phys->zp_mode & S_ISGID) {
1835 acl_ids->z_fgid = dzp->z_phys->zp_gid;
1836 gid = zfs_fuid_map_id(zfsvfs, acl_ids->z_fgid,
1839 acl_ids->z_fgid = zfs_fuid_create_cred(zfsvfs,
1840 ZFS_GROUP, cr, &acl_ids->z_fuidp);
1847 * If we're creating a directory, and the parent directory has the
1848 * set-GID bit set, set in on the new directory.
1849 * Otherwise, if the user is neither privileged nor a member of the
1850 * file's new group, clear the file's set-GID bit.
1853 if (!(flag & IS_ROOT_NODE) && (dzp->z_phys->zp_mode & S_ISGID) &&
1854 (vap->va_type == VDIR)) {
1855 acl_ids->z_mode |= S_ISGID;
1857 if ((acl_ids->z_mode & S_ISGID) &&
1858 secpolicy_vnode_setids_setgids(cr, gid) != 0)
1859 acl_ids->z_mode &= ~S_ISGID;
1862 if (acl_ids->z_aclp == NULL) {
1863 mutex_enter(&dzp->z_lock);
1864 if (!(flag & IS_ROOT_NODE) && (ZTOV(dzp)->v_type == VDIR &&
1865 (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE)) &&
1866 !(dzp->z_phys->zp_flags & ZFS_XATTR)) {
1867 mutex_enter(&dzp->z_acl_lock);
1868 VERIFY(0 == zfs_acl_node_read(dzp, &paclp, B_FALSE));
1869 mutex_exit(&dzp->z_acl_lock);
1870 acl_ids->z_aclp = zfs_acl_inherit(zfsvfs,
1871 vap->va_type, paclp, acl_ids->z_mode, &need_chmod);
1872 zfs_acl_free(paclp);
1875 zfs_acl_alloc(zfs_acl_version_zp(dzp));
1877 mutex_exit(&dzp->z_lock);
1879 acl_ids->z_aclp->z_hints = (vap->va_type == VDIR) ?
1880 ZFS_ACL_AUTO_INHERIT : 0;
1881 zfs_acl_chmod(zfsvfs, acl_ids->z_fuid,
1882 acl_ids->z_mode, acl_ids->z_aclp);
1890 * Free ACL and fuid_infop, but not the acl_ids structure
1893 zfs_acl_ids_free(zfs_acl_ids_t *acl_ids)
1895 if (acl_ids->z_aclp)
1896 zfs_acl_free(acl_ids->z_aclp);
1897 if (acl_ids->z_fuidp)
1898 zfs_fuid_info_free(acl_ids->z_fuidp);
1899 acl_ids->z_aclp = NULL;
1900 acl_ids->z_fuidp = NULL;
1904 zfs_acl_ids_overquota(zfsvfs_t *zfsvfs, zfs_acl_ids_t *acl_ids)
1906 return (zfs_usergroup_overquota(zfsvfs, B_FALSE, acl_ids->z_fuid) ||
1907 zfs_usergroup_overquota(zfsvfs, B_TRUE, acl_ids->z_fgid));
1911 * Retrieve a files ACL
1914 zfs_getacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
1922 mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT |
1923 VSA_ACE_ACLFLAGS | VSA_ACE_ALLTYPES);
1925 if (error = zfs_zaccess(zp, ACE_READ_ACL, 0, skipaclchk, cr))
1931 mutex_enter(&zp->z_acl_lock);
1933 error = zfs_acl_node_read(zp, &aclp, B_FALSE);
1935 mutex_exit(&zp->z_acl_lock);
1940 * Scan ACL to determine number of ACEs
1942 if ((zp->z_phys->zp_flags & ZFS_ACL_OBJ_ACE) &&
1943 !(mask & VSA_ACE_ALLTYPES)) {
1946 uint32_t access_mask;
1947 uint16_t type, iflags;
1949 while (zacep = zfs_acl_next_ace(aclp, zacep,
1950 &who, &access_mask, &iflags, &type)) {
1952 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1953 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1954 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1955 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
1962 vsecp->vsa_aclcnt = count;
1964 count = aclp->z_acl_count;
1966 if (mask & VSA_ACECNT) {
1967 vsecp->vsa_aclcnt = count;
1970 if (mask & VSA_ACE) {
1973 zfs_acl_node_t *aclnode = list_head(&aclp->z_acl);
1975 aclsz = count * sizeof (ace_t) +
1976 sizeof (ace_object_t) * largeace;
1978 vsecp->vsa_aclentp = kmem_alloc(aclsz, KM_SLEEP);
1979 vsecp->vsa_aclentsz = aclsz;
1981 if (aclp->z_version == ZFS_ACL_VERSION_FUID)
1982 zfs_copy_fuid_2_ace(zp->z_zfsvfs, aclp, cr,
1983 vsecp->vsa_aclentp, !(mask & VSA_ACE_ALLTYPES));
1985 bcopy(aclnode->z_acldata, vsecp->vsa_aclentp,
1986 count * sizeof (ace_t));
1989 if (mask & VSA_ACE_ACLFLAGS) {
1990 vsecp->vsa_aclflags = 0;
1991 if (zp->z_phys->zp_flags & ZFS_ACL_DEFAULTED)
1992 vsecp->vsa_aclflags |= ACL_DEFAULTED;
1993 if (zp->z_phys->zp_flags & ZFS_ACL_PROTECTED)
1994 vsecp->vsa_aclflags |= ACL_PROTECTED;
1995 if (zp->z_phys->zp_flags & ZFS_ACL_AUTO_INHERIT)
1996 vsecp->vsa_aclflags |= ACL_AUTO_INHERIT;
1999 mutex_exit(&zp->z_acl_lock);
2007 zfs_vsec_2_aclp(zfsvfs_t *zfsvfs, vtype_t obj_type,
2008 vsecattr_t *vsecp, cred_t *cr, zfs_fuid_info_t **fuidp, zfs_acl_t **zaclp)
2011 zfs_acl_node_t *aclnode;
2012 int aclcnt = vsecp->vsa_aclcnt;
2015 if (vsecp->vsa_aclcnt > MAX_ACL_ENTRIES || vsecp->vsa_aclcnt <= 0)
2018 aclp = zfs_acl_alloc(zfs_acl_version(zfsvfs->z_version));
2021 aclnode = zfs_acl_node_alloc(aclcnt * sizeof (zfs_object_ace_t));
2022 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
2023 if ((error = zfs_copy_ace_2_oldace(obj_type, aclp,
2024 (ace_t *)vsecp->vsa_aclentp, aclnode->z_acldata,
2025 aclcnt, &aclnode->z_size)) != 0) {
2027 zfs_acl_node_free(aclnode);
2031 if ((error = zfs_copy_ace_2_fuid(zfsvfs, obj_type, aclp,
2032 vsecp->vsa_aclentp, aclnode->z_acldata, aclcnt,
2033 &aclnode->z_size, fuidp, cr)) != 0) {
2035 zfs_acl_node_free(aclnode);
2039 aclp->z_acl_bytes = aclnode->z_size;
2040 aclnode->z_ace_count = aclcnt;
2041 aclp->z_acl_count = aclcnt;
2042 list_insert_head(&aclp->z_acl, aclnode);
2045 * If flags are being set then add them to z_hints
2047 if (vsecp->vsa_mask & VSA_ACE_ACLFLAGS) {
2048 if (vsecp->vsa_aclflags & ACL_PROTECTED)
2049 aclp->z_hints |= ZFS_ACL_PROTECTED;
2050 if (vsecp->vsa_aclflags & ACL_DEFAULTED)
2051 aclp->z_hints |= ZFS_ACL_DEFAULTED;
2052 if (vsecp->vsa_aclflags & ACL_AUTO_INHERIT)
2053 aclp->z_hints |= ZFS_ACL_AUTO_INHERIT;
2065 zfs_setacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
2067 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2068 zilog_t *zilog = zfsvfs->z_log;
2069 ulong_t mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT);
2073 zfs_fuid_info_t *fuidp = NULL;
2074 boolean_t fuid_dirtied;
2079 if (zp->z_phys->zp_flags & ZFS_IMMUTABLE)
2082 if (error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr))
2085 error = zfs_vsec_2_aclp(zfsvfs, ZTOV(zp)->v_type, vsecp, cr, &fuidp,
2091 * If ACL wide flags aren't being set then preserve any
2094 if (!(vsecp->vsa_mask & VSA_ACE_ACLFLAGS)) {
2095 aclp->z_hints |= (zp->z_phys->zp_flags & V4_ACL_WIDE_FLAGS);
2098 if (error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr)) {
2103 mutex_enter(&zp->z_lock);
2104 mutex_enter(&zp->z_acl_lock);
2106 tx = dmu_tx_create(zfsvfs->z_os);
2107 dmu_tx_hold_bonus(tx, zp->z_id);
2109 if (zp->z_phys->zp_acl.z_acl_extern_obj) {
2110 /* Are we upgrading ACL? */
2111 if (zfsvfs->z_version <= ZPL_VERSION_FUID &&
2112 zp->z_phys->zp_acl.z_acl_version ==
2113 ZFS_ACL_VERSION_INITIAL) {
2114 dmu_tx_hold_free(tx,
2115 zp->z_phys->zp_acl.z_acl_extern_obj,
2117 dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
2118 0, aclp->z_acl_bytes);
2120 dmu_tx_hold_write(tx,
2121 zp->z_phys->zp_acl.z_acl_extern_obj,
2122 0, aclp->z_acl_bytes);
2124 } else if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
2125 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, aclp->z_acl_bytes);
2127 fuid_dirtied = zfsvfs->z_fuid_dirty;
2129 zfs_fuid_txhold(zfsvfs, tx);
2131 error = dmu_tx_assign(tx, TXG_NOWAIT);
2133 mutex_exit(&zp->z_acl_lock);
2134 mutex_exit(&zp->z_lock);
2136 if (error == ERESTART) {
2146 error = zfs_aclset_common(zp, aclp, cr, tx);
2150 zfs_fuid_sync(zfsvfs, tx);
2152 zfs_time_stamper_locked(zp, STATE_CHANGED, tx);
2153 zfs_log_acl(zilog, tx, zp, vsecp, fuidp);
2156 zfs_fuid_info_free(fuidp);
2160 mutex_exit(&zp->z_acl_lock);
2161 mutex_exit(&zp->z_lock);
2167 * Check accesses of interest (AoI) against attributes of the dataset
2168 * such as read-only. Returns zero if no AoI conflict with dataset
2169 * attributes, otherwise an appropriate errno is returned.
2172 zfs_zaccess_dataset_check(znode_t *zp, uint32_t v4_mode)
2174 if ((v4_mode & WRITE_MASK) &&
2175 (zp->z_zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) &&
2176 (!IS_DEVVP(ZTOV(zp)) ||
2177 (IS_DEVVP(ZTOV(zp)) && (v4_mode & WRITE_MASK_ATTRS)))) {
2182 * Only check for READONLY on non-directories.
2184 if ((v4_mode & WRITE_MASK_DATA) &&
2185 (((ZTOV(zp)->v_type != VDIR) &&
2186 (zp->z_phys->zp_flags & (ZFS_READONLY | ZFS_IMMUTABLE))) ||
2187 (ZTOV(zp)->v_type == VDIR &&
2188 (zp->z_phys->zp_flags & ZFS_IMMUTABLE)))) {
2192 if ((v4_mode & (ACE_DELETE | ACE_DELETE_CHILD)) &&
2193 (zp->z_phys->zp_flags & ZFS_NOUNLINK)) {
2197 if (((v4_mode & (ACE_READ_DATA|ACE_EXECUTE)) &&
2198 (zp->z_phys->zp_flags & ZFS_AV_QUARANTINED))) {
2206 * The primary usage of this function is to loop through all of the
2207 * ACEs in the znode, determining what accesses of interest (AoI) to
2208 * the caller are allowed or denied. The AoI are expressed as bits in
2209 * the working_mode parameter. As each ACE is processed, bits covered
2210 * by that ACE are removed from the working_mode. This removal
2211 * facilitates two things. The first is that when the working mode is
2212 * empty (= 0), we know we've looked at all the AoI. The second is
2213 * that the ACE interpretation rules don't allow a later ACE to undo
2214 * something granted or denied by an earlier ACE. Removing the
2215 * discovered access or denial enforces this rule. At the end of
2216 * processing the ACEs, all AoI that were found to be denied are
2217 * placed into the working_mode, giving the caller a mask of denied
2218 * accesses. Returns:
2219 * 0 if all AoI granted
2220 * EACCESS if the denied mask is non-zero
2221 * other error if abnormal failure (e.g., IO error)
2223 * A secondary usage of the function is to determine if any of the
2224 * AoI are granted. If an ACE grants any access in
2225 * the working_mode, we immediately short circuit out of the function.
2226 * This mode is chosen by setting anyaccess to B_TRUE. The
2227 * working_mode is not a denied access mask upon exit if the function
2228 * is used in this manner.
2231 zfs_zaccess_aces_check(znode_t *zp, uint32_t *working_mode,
2232 boolean_t anyaccess, cred_t *cr)
2234 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2237 uid_t uid = crgetuid(cr);
2239 uint16_t type, iflags;
2240 uint16_t entry_type;
2241 uint32_t access_mask;
2242 uint32_t deny_mask = 0;
2243 zfs_ace_hdr_t *acep = NULL;
2248 zfs_fuid_map_ids(zp, cr, &fowner, &gowner);
2250 mutex_enter(&zp->z_acl_lock);
2252 error = zfs_acl_node_read(zp, &aclp, B_FALSE);
2254 mutex_exit(&zp->z_acl_lock);
2258 while (acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
2260 uint32_t mask_matched;
2262 if (!zfs_acl_valid_ace_type(type, iflags))
2265 if (ZTOV(zp)->v_type == VDIR && (iflags & ACE_INHERIT_ONLY_ACE))
2268 /* Skip ACE if it does not affect any AoI */
2269 mask_matched = (access_mask & *working_mode);
2273 entry_type = (iflags & ACE_TYPE_FLAGS);
2277 switch (entry_type) {
2285 case ACE_IDENTIFIER_GROUP:
2286 checkit = zfs_groupmember(zfsvfs, who, cr);
2294 if (entry_type == 0) {
2297 newid = zfs_fuid_map_id(zfsvfs, who, cr,
2299 if (newid != IDMAP_WK_CREATOR_OWNER_UID &&
2305 mutex_exit(&zp->z_acl_lock);
2312 DTRACE_PROBE3(zfs__ace__denies,
2314 zfs_ace_hdr_t *, acep,
2315 uint32_t, mask_matched);
2316 deny_mask |= mask_matched;
2318 DTRACE_PROBE3(zfs__ace__allows,
2320 zfs_ace_hdr_t *, acep,
2321 uint32_t, mask_matched);
2323 mutex_exit(&zp->z_acl_lock);
2328 *working_mode &= ~mask_matched;
2332 if (*working_mode == 0)
2336 mutex_exit(&zp->z_acl_lock);
2339 /* Put the found 'denies' back on the working mode */
2341 *working_mode |= deny_mask;
2343 } else if (*working_mode) {
2351 * Return true if any access whatsoever granted, we don't actually
2352 * care what access is granted.
2355 zfs_has_access(znode_t *zp, cred_t *cr)
2357 uint32_t have = ACE_ALL_PERMS;
2359 if (zfs_zaccess_aces_check(zp, &have, B_TRUE, cr) != 0) {
2362 owner = zfs_fuid_map_id(zp->z_zfsvfs,
2363 zp->z_phys->zp_uid, cr, ZFS_OWNER);
2366 secpolicy_vnode_access(cr, ZTOV(zp), owner, VREAD) == 0 ||
2367 secpolicy_vnode_access(cr, ZTOV(zp), owner, VWRITE) == 0 ||
2368 secpolicy_vnode_access(cr, ZTOV(zp), owner, VEXEC) == 0 ||
2369 secpolicy_vnode_chown(cr, B_TRUE) == 0 ||
2370 secpolicy_vnode_chown(cr, B_FALSE) == 0 ||
2371 secpolicy_vnode_setdac(cr, owner) == 0 ||
2372 secpolicy_vnode_remove(cr) == 0);
2378 zfs_zaccess_common(znode_t *zp, uint32_t v4_mode, uint32_t *working_mode,
2379 boolean_t *check_privs, boolean_t skipaclchk, cred_t *cr)
2381 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2384 *working_mode = v4_mode;
2385 *check_privs = B_TRUE;
2388 * Short circuit empty requests
2390 if (v4_mode == 0 || zfsvfs->z_replay) {
2395 if ((err = zfs_zaccess_dataset_check(zp, v4_mode)) != 0) {
2396 *check_privs = B_FALSE;
2401 * The caller requested that the ACL check be skipped. This
2402 * would only happen if the caller checked VOP_ACCESS() with a
2403 * 32 bit ACE mask and already had the appropriate permissions.
2410 return (zfs_zaccess_aces_check(zp, working_mode, B_FALSE, cr));
2414 zfs_zaccess_append(znode_t *zp, uint32_t *working_mode, boolean_t *check_privs,
2417 if (*working_mode != ACE_WRITE_DATA)
2420 return (zfs_zaccess_common(zp, ACE_APPEND_DATA, working_mode,
2421 check_privs, B_FALSE, cr));
2425 * Determine whether Access should be granted/denied, invoking least
2426 * priv subsytem when a deny is determined.
2429 zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr)
2431 uint32_t working_mode;
2434 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2435 boolean_t check_privs;
2437 znode_t *check_zp = zp;
2439 is_attr = ((zp->z_phys->zp_flags & ZFS_XATTR) &&
2440 (ZTOV(zp)->v_type == VDIR));
2443 * If attribute then validate against base file
2446 if ((error = zfs_zget(zp->z_zfsvfs,
2447 zp->z_phys->zp_parent, &xzp)) != 0) {
2454 * fixup mode to map to xattr perms
2457 if (mode & (ACE_WRITE_DATA|ACE_APPEND_DATA)) {
2458 mode &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
2459 mode |= ACE_WRITE_NAMED_ATTRS;
2462 if (mode & (ACE_READ_DATA|ACE_EXECUTE)) {
2463 mode &= ~(ACE_READ_DATA|ACE_EXECUTE);
2464 mode |= ACE_READ_NAMED_ATTRS;
2468 if ((error = zfs_zaccess_common(check_zp, mode, &working_mode,
2469 &check_privs, skipaclchk, cr)) == 0) {
2475 if (error && !check_privs) {
2481 if (error && (flags & V_APPEND)) {
2482 error = zfs_zaccess_append(zp, &working_mode, &check_privs, cr);
2485 if (error && check_privs) {
2487 mode_t checkmode = 0;
2489 owner = zfs_fuid_map_id(zfsvfs, check_zp->z_phys->zp_uid, cr,
2493 * First check for implicit owner permission on
2494 * read_acl/read_attributes
2498 ASSERT(working_mode != 0);
2500 if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES) &&
2501 owner == crgetuid(cr)))
2502 working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES);
2504 if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS|
2505 ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE))
2507 if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
2508 ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
2509 checkmode |= VWRITE;
2510 if (working_mode & ACE_EXECUTE)
2514 error = secpolicy_vnode_access(cr, ZTOV(check_zp),
2517 if (error == 0 && (working_mode & ACE_WRITE_OWNER))
2518 error = secpolicy_vnode_chown(cr, B_TRUE);
2519 if (error == 0 && (working_mode & ACE_WRITE_ACL))
2520 error = secpolicy_vnode_setdac(cr, owner);
2522 if (error == 0 && (working_mode &
2523 (ACE_DELETE|ACE_DELETE_CHILD)))
2524 error = secpolicy_vnode_remove(cr);
2526 if (error == 0 && (working_mode & ACE_SYNCHRONIZE)) {
2527 error = secpolicy_vnode_chown(cr, B_FALSE);
2531 * See if any bits other than those already checked
2532 * for are still present. If so then return EACCES
2534 if (working_mode & ~(ZFS_CHECKED_MASKS)) {
2547 * Translate traditional unix VREAD/VWRITE/VEXEC mode into
2548 * native ACL format and call zfs_zaccess()
2551 zfs_zaccess_rwx(znode_t *zp, mode_t mode, int flags, cred_t *cr)
2553 return (zfs_zaccess(zp, zfs_unix_to_v4(mode >> 6), flags, B_FALSE, cr));
2557 * Access function for secpolicy_vnode_setattr
2560 zfs_zaccess_unix(znode_t *zp, mode_t mode, cred_t *cr)
2562 int v4_mode = zfs_unix_to_v4(mode >> 6);
2564 return (zfs_zaccess(zp, v4_mode, 0, B_FALSE, cr));
2568 zfs_delete_final_check(znode_t *zp, znode_t *dzp,
2569 mode_t missing_perms, cred_t *cr)
2573 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2575 downer = zfs_fuid_map_id(zfsvfs, dzp->z_phys->zp_uid, cr, ZFS_OWNER);
2577 error = secpolicy_vnode_access(cr, ZTOV(dzp), downer, missing_perms);
2580 error = zfs_sticky_remove_access(dzp, zp, cr);
2586 * Determine whether Access should be granted/deny, without
2587 * consulting least priv subsystem.
2590 * The following chart is the recommended NFSv4 enforcement for
2591 * ability to delete an object.
2593 * -------------------------------------------------------
2594 * | Parent Dir | Target Object Permissions |
2596 * -------------------------------------------------------
2597 * | | ACL Allows | ACL Denies| Delete |
2598 * | | Delete | Delete | unspecified|
2599 * -------------------------------------------------------
2600 * | ACL Allows | Permit | Permit | Permit |
2601 * | DELETE_CHILD | |
2602 * -------------------------------------------------------
2603 * | ACL Denies | Permit | Deny | Deny |
2604 * | DELETE_CHILD | | | |
2605 * -------------------------------------------------------
2606 * | ACL specifies | | | |
2607 * | only allow | Permit | Permit | Permit |
2608 * | write and | | | |
2610 * -------------------------------------------------------
2611 * | ACL denies | | | |
2612 * | write and | Permit | Deny | Deny |
2614 * -------------------------------------------------------
2617 * No search privilege, can't even look up file?
2621 zfs_zaccess_delete(znode_t *dzp, znode_t *zp, cred_t *cr)
2623 uint32_t dzp_working_mode = 0;
2624 uint32_t zp_working_mode = 0;
2625 int dzp_error, zp_error;
2626 mode_t missing_perms;
2627 boolean_t dzpcheck_privs = B_TRUE;
2628 boolean_t zpcheck_privs = B_TRUE;
2631 * We want specific DELETE permissions to
2632 * take precedence over WRITE/EXECUTE. We don't
2633 * want an ACL such as this to mess us up.
2634 * user:joe:write_data:deny,user:joe:delete:allow
2636 * However, deny permissions may ultimately be overridden
2637 * by secpolicy_vnode_access().
2639 * We will ask for all of the necessary permissions and then
2640 * look at the working modes from the directory and target object
2641 * to determine what was found.
2644 if (zp->z_phys->zp_flags & (ZFS_IMMUTABLE | ZFS_NOUNLINK))
2649 * If the directory permissions allow the delete, we are done.
2651 if ((dzp_error = zfs_zaccess_common(dzp, ACE_DELETE_CHILD,
2652 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0)
2656 * If target object has delete permission then we are done
2658 if ((zp_error = zfs_zaccess_common(zp, ACE_DELETE, &zp_working_mode,
2659 &zpcheck_privs, B_FALSE, cr)) == 0)
2662 ASSERT(dzp_error && zp_error);
2664 if (!dzpcheck_privs)
2672 * If directory returns EACCES then delete_child was denied
2673 * due to deny delete_child. In this case send the request through
2674 * secpolicy_vnode_remove(). We don't use zfs_delete_final_check()
2675 * since that *could* allow the delete based on write/execute permission
2676 * and we want delete permissions to override write/execute.
2679 if (dzp_error == EACCES)
2680 return (secpolicy_vnode_remove(cr));
2684 * only need to see if we have write/execute on directory.
2687 if ((dzp_error = zfs_zaccess_common(dzp, ACE_EXECUTE|ACE_WRITE_DATA,
2688 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0)
2689 return (zfs_sticky_remove_access(dzp, zp, cr));
2691 if (!dzpcheck_privs)
2698 missing_perms = (dzp_working_mode & ACE_WRITE_DATA) ? VWRITE : 0;
2699 missing_perms |= (dzp_working_mode & ACE_EXECUTE) ? VEXEC : 0;
2701 ASSERT(missing_perms);
2703 return (zfs_delete_final_check(zp, dzp, missing_perms, cr));
2708 zfs_zaccess_rename(znode_t *sdzp, znode_t *szp, znode_t *tdzp,
2709 znode_t *tzp, cred_t *cr)
2714 if (szp->z_phys->zp_flags & ZFS_AV_QUARANTINED)
2717 add_perm = (ZTOV(szp)->v_type == VDIR) ?
2718 ACE_ADD_SUBDIRECTORY : ACE_ADD_FILE;
2721 * Rename permissions are combination of delete permission +
2722 * add file/subdir permission.
2726 * first make sure we do the delete portion.
2728 * If that succeeds then check for add_file/add_subdir permissions
2731 if (error = zfs_zaccess_delete(sdzp, szp, cr))
2735 * If we have a tzp, see if we can delete it?
2738 if (error = zfs_zaccess_delete(tdzp, tzp, cr))
2743 * Now check for add permissions
2745 error = zfs_zaccess(tdzp, add_perm, 0, B_FALSE, cr);