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>
37 #include <sys/cmn_err.h>
38 #include <sys/errno.h>
39 #include <sys/unistd.h>
41 #include <sys/fs/zfs.h>
42 #include <sys/policy.h>
43 #include <sys/zfs_znode.h>
44 #include <sys/zfs_fuid.h>
45 #include <sys/zfs_acl.h>
46 #include <sys/zfs_dir.h>
47 #include <sys/zfs_vfsops.h>
49 #include <sys/dnode.h>
51 #include <acl/acl_common.h>
53 #define ALLOW ACE_ACCESS_ALLOWED_ACE_TYPE
54 #define DENY ACE_ACCESS_DENIED_ACE_TYPE
55 #define MAX_ACE_TYPE ACE_SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE
56 #define MIN_ACE_TYPE ALLOW
58 #define OWNING_GROUP (ACE_GROUP|ACE_IDENTIFIER_GROUP)
59 #define EVERYONE_ALLOW_MASK (ACE_READ_ACL|ACE_READ_ATTRIBUTES | \
60 ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE)
61 #define EVERYONE_DENY_MASK (ACE_WRITE_ACL|ACE_WRITE_OWNER | \
62 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
63 #define OWNER_ALLOW_MASK (ACE_WRITE_ACL | ACE_WRITE_OWNER | \
64 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
66 #define ZFS_CHECKED_MASKS (ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_READ_DATA| \
67 ACE_READ_NAMED_ATTRS|ACE_WRITE_DATA|ACE_WRITE_ATTRIBUTES| \
68 ACE_WRITE_NAMED_ATTRS|ACE_APPEND_DATA|ACE_EXECUTE|ACE_WRITE_OWNER| \
69 ACE_WRITE_ACL|ACE_DELETE|ACE_DELETE_CHILD|ACE_SYNCHRONIZE)
71 #define WRITE_MASK_DATA (ACE_WRITE_DATA|ACE_APPEND_DATA|ACE_WRITE_NAMED_ATTRS)
72 #define WRITE_MASK_ATTRS (ACE_WRITE_ACL|ACE_WRITE_OWNER|ACE_WRITE_ATTRIBUTES| \
73 ACE_DELETE|ACE_DELETE_CHILD)
74 #define WRITE_MASK (WRITE_MASK_DATA|ACE_WRITE_ATTRIBUTES|ACE_WRITE_ACL|\
75 ACE_WRITE_OWNER|ACE_DELETE|ACE_DELETE_CHILD)
77 #define OGE_CLEAR (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
78 ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
80 #define OKAY_MASK_BITS (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
81 ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
83 #define ALL_INHERIT (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE | \
84 ACE_NO_PROPAGATE_INHERIT_ACE|ACE_INHERIT_ONLY_ACE|ACE_INHERITED_ACE)
86 #define RESTRICTED_CLEAR (ACE_WRITE_ACL|ACE_WRITE_OWNER)
88 #define V4_ACL_WIDE_FLAGS (ZFS_ACL_AUTO_INHERIT|ZFS_ACL_DEFAULTED|\
91 #define ZFS_ACL_WIDE_FLAGS (V4_ACL_WIDE_FLAGS|ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|\
94 #define ALL_MODE_EXECS (S_IXUSR | S_IXGRP | S_IXOTH)
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;
784 boolean_t an_exec_denied = B_FALSE;
786 mode = (zp->z_phys->zp_mode & (S_IFMT | S_ISUID | S_ISGID | S_ISVTX));
788 while (acep = zfs_acl_next_ace(aclp, acep, &who,
789 &access_mask, &iflags, &type)) {
791 if (!zfs_acl_valid_ace_type(type, iflags))
794 entry_type = (iflags & ACE_TYPE_FLAGS);
797 * Skip over owner@, group@ or everyone@ inherit only ACEs
799 if ((iflags & ACE_INHERIT_ONLY_ACE) &&
800 (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
801 entry_type == OWNING_GROUP))
804 if (entry_type == ACE_OWNER) {
805 if ((access_mask & ACE_READ_DATA) &&
806 (!(seen & S_IRUSR))) {
812 if ((access_mask & ACE_WRITE_DATA) &&
813 (!(seen & S_IWUSR))) {
819 if ((access_mask & ACE_EXECUTE) &&
820 (!(seen & S_IXUSR))) {
826 } else if (entry_type == OWNING_GROUP) {
827 if ((access_mask & ACE_READ_DATA) &&
828 (!(seen & S_IRGRP))) {
834 if ((access_mask & ACE_WRITE_DATA) &&
835 (!(seen & S_IWGRP))) {
841 if ((access_mask & ACE_EXECUTE) &&
842 (!(seen & S_IXGRP))) {
848 } else if (entry_type == ACE_EVERYONE) {
849 if ((access_mask & ACE_READ_DATA)) {
850 if (!(seen & S_IRUSR)) {
856 if (!(seen & S_IRGRP)) {
862 if (!(seen & S_IROTH)) {
869 if ((access_mask & ACE_WRITE_DATA)) {
870 if (!(seen & S_IWUSR)) {
876 if (!(seen & S_IWGRP)) {
882 if (!(seen & S_IWOTH)) {
889 if ((access_mask & ACE_EXECUTE)) {
890 if (!(seen & S_IXUSR)) {
896 if (!(seen & S_IXGRP)) {
902 if (!(seen & S_IXOTH)) {
911 * Only care if this IDENTIFIER_GROUP or
912 * USER ACE denies execute access to someone,
913 * mode is not affected
915 if ((access_mask & ACE_EXECUTE) && type == DENY)
916 an_exec_denied = B_TRUE;
921 * Failure to allow is effectively a deny, so execute permission
922 * is denied if it was never mentioned or if we explicitly
923 * weren't allowed it.
925 if (!an_exec_denied &&
926 ((seen & ALL_MODE_EXECS) != ALL_MODE_EXECS ||
927 (mode & ALL_MODE_EXECS) != ALL_MODE_EXECS))
928 an_exec_denied = B_TRUE;
931 zp->z_phys->zp_flags &= ~ZFS_NO_EXECS_DENIED;
933 zp->z_phys->zp_flags |= ZFS_NO_EXECS_DENIED;
939 zfs_acl_node_read_internal(znode_t *zp, boolean_t will_modify)
942 zfs_acl_node_t *aclnode;
944 aclp = zfs_acl_alloc(zp->z_phys->zp_acl.z_acl_version);
947 * Version 0 to 1 znode_acl_phys has the size/count fields swapped.
948 * Version 0 didn't have a size field, only a count.
950 if (zp->z_phys->zp_acl.z_acl_version == ZFS_ACL_VERSION_INITIAL) {
951 aclp->z_acl_count = zp->z_phys->zp_acl.z_acl_size;
952 aclp->z_acl_bytes = ZFS_ACL_SIZE(aclp->z_acl_count);
954 aclp->z_acl_count = zp->z_phys->zp_acl.z_acl_count;
955 aclp->z_acl_bytes = zp->z_phys->zp_acl.z_acl_size;
958 aclnode = zfs_acl_node_alloc(will_modify ? aclp->z_acl_bytes : 0);
959 aclnode->z_ace_count = aclp->z_acl_count;
961 bcopy(zp->z_phys->zp_acl.z_ace_data, aclnode->z_acldata,
964 aclnode->z_size = aclp->z_acl_bytes;
965 aclnode->z_acldata = &zp->z_phys->zp_acl.z_ace_data[0];
968 list_insert_head(&aclp->z_acl, aclnode);
974 * Read an external acl object. If the intent is to modify, always
975 * create a new acl and leave any cached acl in place.
978 zfs_acl_node_read(znode_t *zp, zfs_acl_t **aclpp, boolean_t will_modify)
980 uint64_t extacl = zp->z_phys->zp_acl.z_acl_extern_obj;
984 zfs_acl_node_t *aclnode;
987 ASSERT(MUTEX_HELD(&zp->z_acl_lock));
989 if (zp->z_acl_cached && !will_modify) {
990 *aclpp = zp->z_acl_cached;
994 if (zp->z_phys->zp_acl.z_acl_extern_obj == 0) {
995 *aclpp = zfs_acl_node_read_internal(zp, will_modify);
997 zp->z_acl_cached = *aclpp;
1001 aclp = zfs_acl_alloc(zp->z_phys->zp_acl.z_acl_version);
1002 if (zp->z_phys->zp_acl.z_acl_version == ZFS_ACL_VERSION_INITIAL) {
1003 zfs_acl_phys_v0_t *zacl0 =
1004 (zfs_acl_phys_v0_t *)&zp->z_phys->zp_acl;
1006 aclsize = ZFS_ACL_SIZE(zacl0->z_acl_count);
1007 acl_count = zacl0->z_acl_count;
1009 aclsize = zp->z_phys->zp_acl.z_acl_size;
1010 acl_count = zp->z_phys->zp_acl.z_acl_count;
1012 aclsize = acl_count * sizeof (zfs_ace_t);
1014 aclnode = zfs_acl_node_alloc(aclsize);
1015 list_insert_head(&aclp->z_acl, aclnode);
1016 error = dmu_read(zp->z_zfsvfs->z_os, extacl, 0,
1017 aclsize, aclnode->z_acldata, DMU_READ_PREFETCH);
1018 aclnode->z_ace_count = acl_count;
1019 aclp->z_acl_count = acl_count;
1020 aclp->z_acl_bytes = aclsize;
1024 /* convert checksum errors into IO errors */
1025 if (error == ECKSUM)
1032 zp->z_acl_cached = aclp;
1037 * common code for setting ACLs.
1039 * This function is called from zfs_mode_update, zfs_perm_init, and zfs_setacl.
1040 * zfs_setacl passes a non-NULL inherit pointer (ihp) to indicate that it's
1041 * already checked the acl and knows whether to inherit.
1044 zfs_aclset_common(znode_t *zp, zfs_acl_t *aclp, cred_t *cr, dmu_tx_t *tx)
1047 znode_phys_t *zphys = zp->z_phys;
1048 zfs_acl_phys_t *zacl = &zphys->zp_acl;
1049 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1050 uint64_t aoid = zphys->zp_acl.z_acl_extern_obj;
1052 dmu_object_type_t otype;
1053 zfs_acl_node_t *aclnode;
1055 dmu_buf_will_dirty(zp->z_dbuf, tx);
1057 if (zp->z_acl_cached) {
1058 zfs_acl_free(zp->z_acl_cached);
1059 zp->z_acl_cached = NULL;
1062 zphys->zp_mode = zfs_mode_compute(zp, aclp);
1065 * Decide which object type to use. If we are forced to
1066 * use old ACL format then transform ACL into zfs_oldace_t
1069 if (!zfsvfs->z_use_fuids) {
1070 otype = DMU_OT_OLDACL;
1072 if ((aclp->z_version == ZFS_ACL_VERSION_INITIAL) &&
1073 (zfsvfs->z_version >= ZPL_VERSION_FUID))
1074 zfs_acl_xform(zp, aclp, cr);
1075 ASSERT(aclp->z_version >= ZFS_ACL_VERSION_FUID);
1079 if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
1081 * If ACL was previously external and we are now
1082 * converting to new ACL format then release old
1083 * ACL object and create a new one.
1085 if (aoid && aclp->z_version != zacl->z_acl_version) {
1086 error = dmu_object_free(zfsvfs->z_os,
1087 zp->z_phys->zp_acl.z_acl_extern_obj, tx);
1093 aoid = dmu_object_alloc(zfsvfs->z_os,
1094 otype, aclp->z_acl_bytes,
1095 otype == DMU_OT_ACL ? DMU_OT_SYSACL : DMU_OT_NONE,
1096 otype == DMU_OT_ACL ? DN_MAX_BONUSLEN : 0, tx);
1098 (void) dmu_object_set_blocksize(zfsvfs->z_os, aoid,
1099 aclp->z_acl_bytes, 0, tx);
1101 zphys->zp_acl.z_acl_extern_obj = aoid;
1102 for (aclnode = list_head(&aclp->z_acl); aclnode;
1103 aclnode = list_next(&aclp->z_acl, aclnode)) {
1104 if (aclnode->z_ace_count == 0)
1106 dmu_write(zfsvfs->z_os, aoid, off,
1107 aclnode->z_size, aclnode->z_acldata, tx);
1108 off += aclnode->z_size;
1111 void *start = zacl->z_ace_data;
1113 * Migrating back embedded?
1115 if (zphys->zp_acl.z_acl_extern_obj) {
1116 error = dmu_object_free(zfsvfs->z_os,
1117 zp->z_phys->zp_acl.z_acl_extern_obj, tx);
1120 zphys->zp_acl.z_acl_extern_obj = 0;
1123 for (aclnode = list_head(&aclp->z_acl); aclnode;
1124 aclnode = list_next(&aclp->z_acl, aclnode)) {
1125 if (aclnode->z_ace_count == 0)
1127 bcopy(aclnode->z_acldata, start, aclnode->z_size);
1128 start = (caddr_t)start + aclnode->z_size;
1133 * If Old version then swap count/bytes to match old
1134 * layout of znode_acl_phys_t.
1136 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
1137 zphys->zp_acl.z_acl_size = aclp->z_acl_count;
1138 zphys->zp_acl.z_acl_count = aclp->z_acl_bytes;
1140 zphys->zp_acl.z_acl_size = aclp->z_acl_bytes;
1141 zphys->zp_acl.z_acl_count = aclp->z_acl_count;
1144 zphys->zp_acl.z_acl_version = aclp->z_version;
1147 * Replace ACL wide bits, but first clear them.
1149 zp->z_phys->zp_flags &= ~ZFS_ACL_WIDE_FLAGS;
1151 zp->z_phys->zp_flags |= aclp->z_hints;
1153 if (ace_trivial_common(aclp, 0, zfs_ace_walk) == 0)
1154 zp->z_phys->zp_flags |= ZFS_ACL_TRIVIAL;
1160 * Update access mask for prepended ACE
1162 * This applies the "groupmask" value for aclmode property.
1165 zfs_acl_prepend_fixup(zfs_acl_t *aclp, void *acep, void *origacep,
1166 mode_t mode, uint64_t owner)
1168 int rmask, wmask, xmask;
1171 uint32_t origmask, acepmask;
1174 aceflags = aclp->z_ops.ace_flags_get(acep);
1175 fuid = aclp->z_ops.ace_who_get(acep);
1176 origmask = aclp->z_ops.ace_mask_get(origacep);
1177 acepmask = aclp->z_ops.ace_mask_get(acep);
1179 user_ace = (!(aceflags &
1180 (ACE_OWNER|ACE_GROUP|ACE_IDENTIFIER_GROUP)));
1182 if (user_ace && (fuid == owner)) {
1192 if (origmask & ACE_READ_DATA) {
1194 acepmask &= ~ACE_READ_DATA;
1196 acepmask |= ACE_READ_DATA;
1200 if (origmask & ACE_WRITE_DATA) {
1202 acepmask &= ~ACE_WRITE_DATA;
1204 acepmask |= ACE_WRITE_DATA;
1208 if (origmask & ACE_APPEND_DATA) {
1210 acepmask &= ~ACE_APPEND_DATA;
1212 acepmask |= ACE_APPEND_DATA;
1216 if (origmask & ACE_EXECUTE) {
1218 acepmask &= ~ACE_EXECUTE;
1220 acepmask |= ACE_EXECUTE;
1223 aclp->z_ops.ace_mask_set(acep, acepmask);
1227 * Apply mode to canonical six ACEs.
1230 zfs_acl_fixup_canonical_six(zfs_acl_t *aclp, mode_t mode)
1232 zfs_acl_node_t *aclnode = list_tail(&aclp->z_acl);
1234 int maskoff = aclp->z_ops.ace_mask_off();
1235 size_t abstract_size = aclp->z_ops.ace_abstract_size();
1237 ASSERT(aclnode != NULL);
1239 acep = (void *)((caddr_t)aclnode->z_acldata +
1240 aclnode->z_size - (abstract_size * 6));
1243 * Fixup final ACEs to match the mode
1246 adjust_ace_pair_common(acep, maskoff, abstract_size,
1247 (mode & 0700) >> 6); /* owner@ */
1249 acep = (caddr_t)acep + (abstract_size * 2);
1251 adjust_ace_pair_common(acep, maskoff, abstract_size,
1252 (mode & 0070) >> 3); /* group@ */
1254 acep = (caddr_t)acep + (abstract_size * 2);
1255 adjust_ace_pair_common(acep, maskoff,
1256 abstract_size, mode); /* everyone@ */
1261 zfs_acl_ace_match(zfs_acl_t *aclp, void *acep, int allow_deny,
1262 int entry_type, int accessmask)
1264 uint32_t mask = aclp->z_ops.ace_mask_get(acep);
1265 uint16_t type = aclp->z_ops.ace_type_get(acep);
1266 uint16_t flags = aclp->z_ops.ace_flags_get(acep);
1268 return (mask == accessmask && type == allow_deny &&
1269 ((flags & ACE_TYPE_FLAGS) == entry_type));
1273 * Can prepended ACE be reused?
1276 zfs_reuse_deny(zfs_acl_t *aclp, void *acep, void *prevacep)
1282 uint32_t mask, prevmask;
1284 if (prevacep == NULL)
1287 prevtype = aclp->z_ops.ace_type_get(prevacep);
1288 prevflags = aclp->z_ops.ace_flags_get(prevacep);
1289 flags = aclp->z_ops.ace_flags_get(acep);
1290 mask = aclp->z_ops.ace_mask_get(acep);
1291 prevmask = aclp->z_ops.ace_mask_get(prevacep);
1293 if (prevtype != DENY)
1296 if (prevflags != (flags & ACE_IDENTIFIER_GROUP))
1299 okay_masks = (mask & OKAY_MASK_BITS);
1301 if (prevmask & ~okay_masks)
1309 * Insert new ACL node into chain of zfs_acl_node_t's
1311 * This will result in two possible results.
1312 * 1. If the ACL is currently just a single zfs_acl_node and
1313 * we are prepending the entry then current acl node will have
1314 * a new node inserted above it.
1316 * 2. If we are inserting in the middle of current acl node then
1317 * the current node will be split in two and new node will be inserted
1318 * in between the two split nodes.
1320 static zfs_acl_node_t *
1321 zfs_acl_ace_insert(zfs_acl_t *aclp, void *acep)
1323 zfs_acl_node_t *newnode;
1324 zfs_acl_node_t *trailernode = NULL;
1325 zfs_acl_node_t *currnode = zfs_acl_curr_node(aclp);
1326 int curr_idx = aclp->z_curr_node->z_ace_idx;
1330 newnode = zfs_acl_node_alloc(aclp->z_ops.ace_size(acep));
1331 newnode->z_ace_count = 1;
1333 oldsize = currnode->z_size;
1335 if (curr_idx != 1) {
1336 trailernode = zfs_acl_node_alloc(0);
1337 trailernode->z_acldata = acep;
1339 trailer_count = currnode->z_ace_count - curr_idx + 1;
1340 currnode->z_ace_count = curr_idx - 1;
1341 currnode->z_size = (caddr_t)acep - (caddr_t)currnode->z_acldata;
1342 trailernode->z_size = oldsize - currnode->z_size;
1343 trailernode->z_ace_count = trailer_count;
1346 aclp->z_acl_count += 1;
1347 aclp->z_acl_bytes += aclp->z_ops.ace_size(acep);
1350 list_insert_before(&aclp->z_acl, currnode, newnode);
1352 list_insert_after(&aclp->z_acl, currnode, newnode);
1354 list_insert_after(&aclp->z_acl, newnode, trailernode);
1355 aclp->z_curr_node = trailernode;
1356 trailernode->z_ace_idx = 1;
1366 zfs_acl_prepend_deny(uint64_t uid, zfs_acl_t *aclp, void *acep,
1369 zfs_acl_node_t *aclnode;
1374 aclnode = zfs_acl_ace_insert(aclp, acep);
1375 newacep = aclnode->z_acldata;
1376 fuid = aclp->z_ops.ace_who_get(acep);
1377 flags = aclp->z_ops.ace_flags_get(acep);
1378 zfs_set_ace(aclp, newacep, 0, DENY, fuid, (flags & ACE_TYPE_FLAGS));
1379 zfs_acl_prepend_fixup(aclp, newacep, acep, mode, uid);
1385 * Split an inherited ACE into inherit_only ACE
1386 * and original ACE with inheritance flags stripped off.
1389 zfs_acl_split_ace(zfs_acl_t *aclp, zfs_ace_hdr_t *acep)
1391 zfs_acl_node_t *aclnode;
1392 zfs_acl_node_t *currnode;
1394 uint16_t type, flags;
1398 type = aclp->z_ops.ace_type_get(acep);
1399 flags = aclp->z_ops.ace_flags_get(acep);
1400 mask = aclp->z_ops.ace_mask_get(acep);
1401 fuid = aclp->z_ops.ace_who_get(acep);
1403 aclnode = zfs_acl_ace_insert(aclp, acep);
1404 newacep = aclnode->z_acldata;
1406 aclp->z_ops.ace_type_set(newacep, type);
1407 aclp->z_ops.ace_flags_set(newacep, flags | ACE_INHERIT_ONLY_ACE);
1408 aclp->z_ops.ace_mask_set(newacep, mask);
1409 aclp->z_ops.ace_type_set(newacep, type);
1410 aclp->z_ops.ace_who_set(newacep, fuid);
1411 aclp->z_next_ace = acep;
1412 flags &= ~ALL_INHERIT;
1413 aclp->z_ops.ace_flags_set(acep, flags);
1414 currnode = zfs_acl_curr_node(aclp);
1415 ASSERT(currnode->z_ace_idx >= 1);
1416 currnode->z_ace_idx -= 1;
1420 * Are ACES started at index i, the canonical six ACES?
1423 zfs_have_canonical_six(zfs_acl_t *aclp)
1426 zfs_acl_node_t *aclnode = list_tail(&aclp->z_acl);
1428 size_t abstract_size = aclp->z_ops.ace_abstract_size();
1430 ASSERT(aclnode != NULL);
1432 if (aclnode->z_ace_count < 6)
1435 acep = (void *)((caddr_t)aclnode->z_acldata +
1436 aclnode->z_size - (aclp->z_ops.ace_abstract_size() * 6));
1438 if ((zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
1439 DENY, ACE_OWNER, 0) &&
1440 zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
1441 ALLOW, ACE_OWNER, OWNER_ALLOW_MASK) &&
1442 zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++), DENY,
1443 OWNING_GROUP, 0) && zfs_acl_ace_match(aclp, (caddr_t)acep +
1444 (abstract_size * i++),
1445 ALLOW, OWNING_GROUP, 0) &&
1446 zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
1447 DENY, ACE_EVERYONE, EVERYONE_DENY_MASK) &&
1448 zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
1449 ALLOW, ACE_EVERYONE, EVERYONE_ALLOW_MASK))) {
1458 * Apply step 1g, to group entries
1460 * Need to deal with corner case where group may have
1461 * greater permissions than owner. If so then limit
1462 * group permissions, based on what extra permissions
1466 zfs_fixup_group_entries(zfs_acl_t *aclp, void *acep, void *prevacep,
1469 uint32_t prevmask = aclp->z_ops.ace_mask_get(prevacep);
1470 uint32_t mask = aclp->z_ops.ace_mask_get(acep);
1471 uint16_t prevflags = aclp->z_ops.ace_flags_get(prevacep);
1472 mode_t extramode = (mode >> 3) & 07;
1473 mode_t ownermode = (mode >> 6);
1475 if (prevflags & ACE_IDENTIFIER_GROUP) {
1477 extramode &= ~ownermode;
1480 if (extramode & S_IROTH) {
1481 prevmask &= ~ACE_READ_DATA;
1482 mask &= ~ACE_READ_DATA;
1484 if (extramode & S_IWOTH) {
1485 prevmask &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
1486 mask &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
1488 if (extramode & S_IXOTH) {
1489 prevmask &= ~ACE_EXECUTE;
1490 mask &= ~ACE_EXECUTE;
1494 aclp->z_ops.ace_mask_set(acep, mask);
1495 aclp->z_ops.ace_mask_set(prevacep, prevmask);
1499 * Apply the chmod algorithm as described
1503 zfs_acl_chmod(zfsvfs_t *zfsvfs, uint64_t uid,
1504 uint64_t mode, zfs_acl_t *aclp)
1506 void *acep = NULL, *prevacep = NULL;
1511 int need_canonical_six = 1;
1512 uint16_t iflags, type;
1513 uint32_t access_mask;
1516 * If discard then just discard all ACL nodes which
1517 * represent the ACEs.
1519 * New owner@/group@/everone@ ACEs will be added
1522 if (zfsvfs->z_acl_mode == ZFS_ACL_DISCARD)
1523 zfs_acl_release_nodes(aclp);
1525 while (acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
1528 entry_type = (iflags & ACE_TYPE_FLAGS);
1529 iflags = (iflags & ALL_INHERIT);
1531 if ((type != ALLOW && type != DENY) ||
1532 (iflags & ACE_INHERIT_ONLY_ACE)) {
1534 aclp->z_hints |= ZFS_INHERIT_ACE;
1536 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1537 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1538 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1539 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
1540 aclp->z_hints |= ZFS_ACL_OBJ_ACE;
1547 * Need to split ace into two?
1549 if ((iflags & (ACE_FILE_INHERIT_ACE|
1550 ACE_DIRECTORY_INHERIT_ACE)) &&
1551 (!(iflags & ACE_INHERIT_ONLY_ACE))) {
1552 zfs_acl_split_ace(aclp, acep);
1553 aclp->z_hints |= ZFS_INHERIT_ACE;
1557 if (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
1558 (entry_type == OWNING_GROUP)) {
1559 access_mask &= ~OGE_CLEAR;
1560 aclp->z_ops.ace_mask_set(acep, access_mask);
1563 reuse_deny = B_TRUE;
1564 if (type == ALLOW) {
1567 * Check preceding ACE if any, to see
1568 * if we need to prepend a DENY ACE.
1569 * This is only applicable when the acl_mode
1570 * property == groupmask.
1572 if (zfsvfs->z_acl_mode == ZFS_ACL_GROUPMASK) {
1574 reuse_deny = zfs_reuse_deny(aclp, acep,
1579 zfs_acl_prepend_deny(uid,
1582 zfs_acl_prepend_fixup(
1586 zfs_fixup_group_entries(aclp, acep,
1596 * Check out last six aces, if we have six.
1599 if (aclp->z_acl_count >= 6) {
1600 if (zfs_have_canonical_six(aclp)) {
1601 need_canonical_six = 0;
1605 if (need_canonical_six) {
1606 size_t abstract_size = aclp->z_ops.ace_abstract_size();
1608 zfs_acl_node_t *aclnode =
1609 zfs_acl_node_alloc(abstract_size * 6);
1611 aclnode->z_size = abstract_size * 6;
1612 aclnode->z_ace_count = 6;
1613 aclp->z_acl_bytes += aclnode->z_size;
1614 list_insert_tail(&aclp->z_acl, aclnode);
1616 zacep = aclnode->z_acldata;
1619 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
1620 0, DENY, -1, ACE_OWNER);
1621 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
1622 OWNER_ALLOW_MASK, ALLOW, -1, ACE_OWNER);
1623 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++), 0,
1624 DENY, -1, OWNING_GROUP);
1625 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++), 0,
1626 ALLOW, -1, OWNING_GROUP);
1627 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
1628 EVERYONE_DENY_MASK, DENY, -1, ACE_EVERYONE);
1629 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
1630 EVERYONE_ALLOW_MASK, ALLOW, -1, ACE_EVERYONE);
1631 aclp->z_acl_count += 6;
1634 zfs_acl_fixup_canonical_six(aclp, mode);
1638 zfs_acl_chmod_setattr(znode_t *zp, zfs_acl_t **aclp, uint64_t mode)
1642 mutex_enter(&zp->z_lock);
1643 mutex_enter(&zp->z_acl_lock);
1645 error = zfs_acl_node_read(zp, aclp, B_TRUE);
1647 (*aclp)->z_hints = zp->z_phys->zp_flags & V4_ACL_WIDE_FLAGS;
1648 zfs_acl_chmod(zp->z_zfsvfs, zp->z_phys->zp_uid, mode, *aclp);
1650 mutex_exit(&zp->z_acl_lock);
1651 mutex_exit(&zp->z_lock);
1656 * strip off write_owner and write_acl
1659 zfs_restricted_update(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, void *acep)
1661 uint32_t mask = aclp->z_ops.ace_mask_get(acep);
1663 if ((zfsvfs->z_acl_inherit == ZFS_ACL_RESTRICTED) &&
1664 (aclp->z_ops.ace_type_get(acep) == ALLOW)) {
1665 mask &= ~RESTRICTED_CLEAR;
1666 aclp->z_ops.ace_mask_set(acep, mask);
1671 * Should ACE be inherited?
1674 zfs_ace_can_use(vtype_t vtype, uint16_t acep_flags)
1676 int iflags = (acep_flags & 0xf);
1678 if ((vtype == VDIR) && (iflags & ACE_DIRECTORY_INHERIT_ACE))
1680 else if (iflags & ACE_FILE_INHERIT_ACE)
1681 return (!((vtype == VDIR) &&
1682 (iflags & ACE_NO_PROPAGATE_INHERIT_ACE)));
1687 * inherit inheritable ACEs from parent
1690 zfs_acl_inherit(zfsvfs_t *zfsvfs, vtype_t vtype, zfs_acl_t *paclp,
1691 uint64_t mode, boolean_t *need_chmod)
1695 zfs_acl_node_t *aclnode, *aclnode2;
1696 zfs_acl_t *aclp = NULL;
1698 uint32_t access_mask;
1699 uint16_t iflags, newflags, type;
1701 void *data1, *data2;
1702 size_t data1sz, data2sz;
1703 boolean_t vdir = vtype == VDIR;
1704 boolean_t vreg = vtype == VREG;
1705 boolean_t passthrough, passthrough_x, noallow;
1708 zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH_X;
1709 passthrough = passthrough_x ||
1710 zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH;
1712 zfsvfs->z_acl_inherit == ZFS_ACL_NOALLOW;
1714 *need_chmod = B_TRUE;
1716 aclp = zfs_acl_alloc(paclp->z_version);
1717 if (zfsvfs->z_acl_inherit == ZFS_ACL_DISCARD)
1719 while (pacep = zfs_acl_next_ace(paclp, pacep, &who,
1720 &access_mask, &iflags, &type)) {
1723 * don't inherit bogus ACEs
1725 if (!zfs_acl_valid_ace_type(type, iflags))
1728 if (noallow && type == ALLOW)
1731 ace_size = aclp->z_ops.ace_size(pacep);
1733 if (!zfs_ace_can_use(vtype, iflags))
1737 * If owner@, group@, or everyone@ inheritable
1738 * then zfs_acl_chmod() isn't needed.
1741 ((iflags & (ACE_OWNER|ACE_EVERYONE)) ||
1742 ((iflags & OWNING_GROUP) ==
1743 OWNING_GROUP)) && (vreg || (vdir && (iflags &
1744 ACE_DIRECTORY_INHERIT_ACE)))) {
1745 *need_chmod = B_FALSE;
1747 if (!vdir && passthrough_x &&
1748 ((mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0)) {
1749 access_mask &= ~ACE_EXECUTE;
1753 aclnode = zfs_acl_node_alloc(ace_size);
1754 list_insert_tail(&aclp->z_acl, aclnode);
1755 acep = aclnode->z_acldata;
1757 zfs_set_ace(aclp, acep, access_mask, type,
1758 who, iflags|ACE_INHERITED_ACE);
1761 * Copy special opaque data if any
1763 if ((data1sz = paclp->z_ops.ace_data(pacep, &data1)) != 0) {
1764 VERIFY((data2sz = aclp->z_ops.ace_data(acep,
1765 &data2)) == data1sz);
1766 bcopy(data1, data2, data2sz);
1768 aclp->z_acl_count++;
1769 aclnode->z_ace_count++;
1770 aclp->z_acl_bytes += aclnode->z_size;
1771 newflags = aclp->z_ops.ace_flags_get(acep);
1774 aclp->z_hints |= ZFS_INHERIT_ACE;
1776 if ((iflags & ACE_NO_PROPAGATE_INHERIT_ACE) || !vdir) {
1777 newflags &= ~ALL_INHERIT;
1778 aclp->z_ops.ace_flags_set(acep,
1779 newflags|ACE_INHERITED_ACE);
1780 zfs_restricted_update(zfsvfs, aclp, acep);
1786 newflags = aclp->z_ops.ace_flags_get(acep);
1787 if ((iflags & (ACE_FILE_INHERIT_ACE |
1788 ACE_DIRECTORY_INHERIT_ACE)) !=
1789 ACE_FILE_INHERIT_ACE) {
1790 aclnode2 = zfs_acl_node_alloc(ace_size);
1791 list_insert_tail(&aclp->z_acl, aclnode2);
1792 acep2 = aclnode2->z_acldata;
1793 zfs_set_ace(aclp, acep2,
1794 access_mask, type, who,
1795 iflags|ACE_INHERITED_ACE);
1796 newflags |= ACE_INHERIT_ONLY_ACE;
1797 aclp->z_ops.ace_flags_set(acep, newflags);
1798 newflags &= ~ALL_INHERIT;
1799 aclp->z_ops.ace_flags_set(acep2,
1800 newflags|ACE_INHERITED_ACE);
1803 * Copy special opaque data if any
1805 if ((data1sz = aclp->z_ops.ace_data(acep,
1808 aclp->z_ops.ace_data(acep2,
1809 &data2)) == data1sz);
1810 bcopy(data1, data2, data1sz);
1812 aclp->z_acl_count++;
1813 aclnode2->z_ace_count++;
1814 aclp->z_acl_bytes += aclnode->z_size;
1815 zfs_restricted_update(zfsvfs, aclp, acep2);
1817 newflags |= ACE_INHERIT_ONLY_ACE;
1818 aclp->z_ops.ace_flags_set(acep,
1819 newflags|ACE_INHERITED_ACE);
1826 * Create file system object initial permissions
1827 * including inheritable ACEs.
1830 zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
1831 vsecattr_t *vsecp, zfs_acl_ids_t *acl_ids)
1834 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
1837 boolean_t need_chmod = B_TRUE;
1839 bzero(acl_ids, sizeof (zfs_acl_ids_t));
1840 acl_ids->z_mode = MAKEIMODE(vap->va_type, vap->va_mode);
1843 if ((error = zfs_vsec_2_aclp(zfsvfs, vap->va_type, vsecp, cr,
1844 &acl_ids->z_fuidp, &acl_ids->z_aclp)) != 0)
1848 * Determine uid and gid.
1850 if ((flag & IS_ROOT_NODE) || zfsvfs->z_replay ||
1851 ((flag & IS_XATTR) && (vap->va_type == VDIR))) {
1852 acl_ids->z_fuid = zfs_fuid_create(zfsvfs,
1853 (uint64_t)vap->va_uid, cr,
1854 ZFS_OWNER, &acl_ids->z_fuidp);
1855 acl_ids->z_fgid = zfs_fuid_create(zfsvfs,
1856 (uint64_t)vap->va_gid, cr,
1857 ZFS_GROUP, &acl_ids->z_fuidp);
1860 acl_ids->z_fuid = zfs_fuid_create_cred(zfsvfs, ZFS_OWNER,
1861 cr, &acl_ids->z_fuidp);
1862 acl_ids->z_fgid = 0;
1863 if (vap->va_mask & AT_GID) {
1864 acl_ids->z_fgid = zfs_fuid_create(zfsvfs,
1865 (uint64_t)vap->va_gid,
1866 cr, ZFS_GROUP, &acl_ids->z_fuidp);
1868 if (acl_ids->z_fgid != dzp->z_phys->zp_gid &&
1869 !groupmember(vap->va_gid, cr) &&
1870 secpolicy_vnode_create_gid(cr) != 0)
1871 acl_ids->z_fgid = 0;
1873 if (acl_ids->z_fgid == 0) {
1874 if (dzp->z_phys->zp_mode & S_ISGID) {
1875 acl_ids->z_fgid = dzp->z_phys->zp_gid;
1876 gid = zfs_fuid_map_id(zfsvfs, acl_ids->z_fgid,
1879 acl_ids->z_fgid = zfs_fuid_create_cred(zfsvfs,
1880 ZFS_GROUP, cr, &acl_ids->z_fuidp);
1882 gid = acl_ids->z_fgid = dzp->z_phys->zp_gid;
1891 * If we're creating a directory, and the parent directory has the
1892 * set-GID bit set, set in on the new directory.
1893 * Otherwise, if the user is neither privileged nor a member of the
1894 * file's new group, clear the file's set-GID bit.
1897 if (!(flag & IS_ROOT_NODE) && (dzp->z_phys->zp_mode & S_ISGID) &&
1898 (vap->va_type == VDIR)) {
1899 acl_ids->z_mode |= S_ISGID;
1901 if ((acl_ids->z_mode & S_ISGID) &&
1902 secpolicy_vnode_setids_setgids(ZTOV(dzp), cr, gid) != 0)
1903 acl_ids->z_mode &= ~S_ISGID;
1906 if (acl_ids->z_aclp == NULL) {
1907 mutex_enter(&dzp->z_lock);
1908 if (!(flag & IS_ROOT_NODE) && (ZTOV(dzp)->v_type == VDIR &&
1909 (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE)) &&
1910 !(dzp->z_phys->zp_flags & ZFS_XATTR)) {
1911 mutex_enter(&dzp->z_acl_lock);
1912 VERIFY(0 == zfs_acl_node_read(dzp, &paclp, B_FALSE));
1913 mutex_exit(&dzp->z_acl_lock);
1914 acl_ids->z_aclp = zfs_acl_inherit(zfsvfs,
1915 vap->va_type, paclp, acl_ids->z_mode, &need_chmod);
1918 zfs_acl_alloc(zfs_acl_version_zp(dzp));
1920 mutex_exit(&dzp->z_lock);
1922 acl_ids->z_aclp->z_hints = (vap->va_type == VDIR) ?
1923 ZFS_ACL_AUTO_INHERIT : 0;
1924 zfs_acl_chmod(zfsvfs, acl_ids->z_fuid,
1925 acl_ids->z_mode, acl_ids->z_aclp);
1933 * Free ACL and fuid_infop, but not the acl_ids structure
1936 zfs_acl_ids_free(zfs_acl_ids_t *acl_ids)
1938 if (acl_ids->z_aclp)
1939 zfs_acl_free(acl_ids->z_aclp);
1940 if (acl_ids->z_fuidp)
1941 zfs_fuid_info_free(acl_ids->z_fuidp);
1942 acl_ids->z_aclp = NULL;
1943 acl_ids->z_fuidp = NULL;
1947 zfs_acl_ids_overquota(zfsvfs_t *zfsvfs, zfs_acl_ids_t *acl_ids)
1949 return (zfs_usergroup_overquota(zfsvfs, B_FALSE, acl_ids->z_fuid) ||
1950 zfs_usergroup_overquota(zfsvfs, B_TRUE, acl_ids->z_fgid));
1954 * Retrieve a files ACL
1957 zfs_getacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
1965 mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT |
1966 VSA_ACE_ACLFLAGS | VSA_ACE_ALLTYPES);
1968 if (error = zfs_zaccess(zp, ACE_READ_ACL, 0, skipaclchk, cr))
1974 mutex_enter(&zp->z_acl_lock);
1976 error = zfs_acl_node_read(zp, &aclp, B_FALSE);
1978 mutex_exit(&zp->z_acl_lock);
1983 * Scan ACL to determine number of ACEs
1985 if ((zp->z_phys->zp_flags & ZFS_ACL_OBJ_ACE) &&
1986 !(mask & VSA_ACE_ALLTYPES)) {
1989 uint32_t access_mask;
1990 uint16_t type, iflags;
1992 while (zacep = zfs_acl_next_ace(aclp, zacep,
1993 &who, &access_mask, &iflags, &type)) {
1995 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1996 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1997 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1998 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
2005 vsecp->vsa_aclcnt = count;
2007 count = aclp->z_acl_count;
2009 if (mask & VSA_ACECNT) {
2010 vsecp->vsa_aclcnt = count;
2013 if (mask & VSA_ACE) {
2016 aclsz = count * sizeof (ace_t) +
2017 sizeof (ace_object_t) * largeace;
2019 vsecp->vsa_aclentp = kmem_alloc(aclsz, KM_SLEEP);
2020 vsecp->vsa_aclentsz = aclsz;
2022 if (aclp->z_version == ZFS_ACL_VERSION_FUID)
2023 zfs_copy_fuid_2_ace(zp->z_zfsvfs, aclp, cr,
2024 vsecp->vsa_aclentp, !(mask & VSA_ACE_ALLTYPES));
2026 zfs_acl_node_t *aclnode;
2027 void *start = vsecp->vsa_aclentp;
2029 for (aclnode = list_head(&aclp->z_acl); aclnode;
2030 aclnode = list_next(&aclp->z_acl, aclnode)) {
2031 bcopy(aclnode->z_acldata, start,
2033 start = (caddr_t)start + aclnode->z_size;
2035 ASSERT((caddr_t)start - (caddr_t)vsecp->vsa_aclentp ==
2039 if (mask & VSA_ACE_ACLFLAGS) {
2040 vsecp->vsa_aclflags = 0;
2041 if (zp->z_phys->zp_flags & ZFS_ACL_DEFAULTED)
2042 vsecp->vsa_aclflags |= ACL_DEFAULTED;
2043 if (zp->z_phys->zp_flags & ZFS_ACL_PROTECTED)
2044 vsecp->vsa_aclflags |= ACL_PROTECTED;
2045 if (zp->z_phys->zp_flags & ZFS_ACL_AUTO_INHERIT)
2046 vsecp->vsa_aclflags |= ACL_AUTO_INHERIT;
2049 mutex_exit(&zp->z_acl_lock);
2055 zfs_vsec_2_aclp(zfsvfs_t *zfsvfs, vtype_t obj_type,
2056 vsecattr_t *vsecp, cred_t *cr, zfs_fuid_info_t **fuidp, zfs_acl_t **zaclp)
2059 zfs_acl_node_t *aclnode;
2060 int aclcnt = vsecp->vsa_aclcnt;
2063 if (vsecp->vsa_aclcnt > MAX_ACL_ENTRIES || vsecp->vsa_aclcnt <= 0)
2066 aclp = zfs_acl_alloc(zfs_acl_version(zfsvfs->z_version));
2069 aclnode = zfs_acl_node_alloc(aclcnt * sizeof (zfs_object_ace_t));
2070 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
2071 if ((error = zfs_copy_ace_2_oldace(obj_type, aclp,
2072 (ace_t *)vsecp->vsa_aclentp, aclnode->z_acldata,
2073 aclcnt, &aclnode->z_size)) != 0) {
2075 zfs_acl_node_free(aclnode);
2079 if ((error = zfs_copy_ace_2_fuid(zfsvfs, obj_type, aclp,
2080 vsecp->vsa_aclentp, aclnode->z_acldata, aclcnt,
2081 &aclnode->z_size, fuidp, cr)) != 0) {
2083 zfs_acl_node_free(aclnode);
2087 aclp->z_acl_bytes = aclnode->z_size;
2088 aclnode->z_ace_count = aclcnt;
2089 aclp->z_acl_count = aclcnt;
2090 list_insert_head(&aclp->z_acl, aclnode);
2093 * If flags are being set then add them to z_hints
2095 if (vsecp->vsa_mask & VSA_ACE_ACLFLAGS) {
2096 if (vsecp->vsa_aclflags & ACL_PROTECTED)
2097 aclp->z_hints |= ZFS_ACL_PROTECTED;
2098 if (vsecp->vsa_aclflags & ACL_DEFAULTED)
2099 aclp->z_hints |= ZFS_ACL_DEFAULTED;
2100 if (vsecp->vsa_aclflags & ACL_AUTO_INHERIT)
2101 aclp->z_hints |= ZFS_ACL_AUTO_INHERIT;
2113 zfs_setacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
2115 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2116 zilog_t *zilog = zfsvfs->z_log;
2117 ulong_t mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT);
2121 zfs_fuid_info_t *fuidp = NULL;
2122 boolean_t fuid_dirtied;
2127 if (zp->z_phys->zp_flags & ZFS_IMMUTABLE)
2130 if (error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr))
2133 error = zfs_vsec_2_aclp(zfsvfs, ZTOV(zp)->v_type, vsecp, cr, &fuidp,
2139 * If ACL wide flags aren't being set then preserve any
2142 if (!(vsecp->vsa_mask & VSA_ACE_ACLFLAGS)) {
2143 aclp->z_hints |= (zp->z_phys->zp_flags & V4_ACL_WIDE_FLAGS);
2146 mutex_enter(&zp->z_lock);
2147 mutex_enter(&zp->z_acl_lock);
2149 tx = dmu_tx_create(zfsvfs->z_os);
2150 dmu_tx_hold_bonus(tx, zp->z_id);
2152 if (zp->z_phys->zp_acl.z_acl_extern_obj) {
2153 /* Are we upgrading ACL? */
2154 if (zfsvfs->z_version <= ZPL_VERSION_FUID &&
2155 zp->z_phys->zp_acl.z_acl_version ==
2156 ZFS_ACL_VERSION_INITIAL) {
2157 dmu_tx_hold_free(tx,
2158 zp->z_phys->zp_acl.z_acl_extern_obj,
2160 dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
2161 0, aclp->z_acl_bytes);
2163 dmu_tx_hold_write(tx,
2164 zp->z_phys->zp_acl.z_acl_extern_obj,
2165 0, aclp->z_acl_bytes);
2167 } else if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
2168 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, aclp->z_acl_bytes);
2170 fuid_dirtied = zfsvfs->z_fuid_dirty;
2172 zfs_fuid_txhold(zfsvfs, tx);
2174 error = dmu_tx_assign(tx, TXG_NOWAIT);
2176 mutex_exit(&zp->z_acl_lock);
2177 mutex_exit(&zp->z_lock);
2179 if (error == ERESTART) {
2189 error = zfs_aclset_common(zp, aclp, cr, tx);
2191 zp->z_acl_cached = aclp;
2194 zfs_fuid_sync(zfsvfs, tx);
2196 zfs_time_stamper_locked(zp, STATE_CHANGED, tx);
2197 zfs_log_acl(zilog, tx, zp, vsecp, fuidp);
2200 zfs_fuid_info_free(fuidp);
2203 mutex_exit(&zp->z_acl_lock);
2204 mutex_exit(&zp->z_lock);
2210 * Check accesses of interest (AoI) against attributes of the dataset
2211 * such as read-only. Returns zero if no AoI conflict with dataset
2212 * attributes, otherwise an appropriate errno is returned.
2215 zfs_zaccess_dataset_check(znode_t *zp, uint32_t v4_mode)
2217 if ((v4_mode & WRITE_MASK) &&
2218 (zp->z_zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) &&
2219 (!IS_DEVVP(ZTOV(zp)) ||
2220 (IS_DEVVP(ZTOV(zp)) && (v4_mode & WRITE_MASK_ATTRS)))) {
2225 * Only check for READONLY on non-directories.
2227 if ((v4_mode & WRITE_MASK_DATA) &&
2228 (((ZTOV(zp)->v_type != VDIR) &&
2229 (zp->z_phys->zp_flags & (ZFS_READONLY | ZFS_IMMUTABLE))) ||
2230 (ZTOV(zp)->v_type == VDIR &&
2231 (zp->z_phys->zp_flags & ZFS_IMMUTABLE)))) {
2236 if ((v4_mode & (ACE_DELETE | ACE_DELETE_CHILD)) &&
2237 (zp->z_phys->zp_flags & ZFS_NOUNLINK)) {
2242 * In FreeBSD we allow to modify directory's content is ZFS_NOUNLINK
2243 * (sunlnk) is set. We just don't allow directory removal, which is
2244 * handled in zfs_zaccess_delete().
2246 if ((v4_mode & ACE_DELETE) &&
2247 (zp->z_phys->zp_flags & ZFS_NOUNLINK)) {
2252 if (((v4_mode & (ACE_READ_DATA|ACE_EXECUTE)) &&
2253 (zp->z_phys->zp_flags & ZFS_AV_QUARANTINED))) {
2261 * The primary usage of this function is to loop through all of the
2262 * ACEs in the znode, determining what accesses of interest (AoI) to
2263 * the caller are allowed or denied. The AoI are expressed as bits in
2264 * the working_mode parameter. As each ACE is processed, bits covered
2265 * by that ACE are removed from the working_mode. This removal
2266 * facilitates two things. The first is that when the working mode is
2267 * empty (= 0), we know we've looked at all the AoI. The second is
2268 * that the ACE interpretation rules don't allow a later ACE to undo
2269 * something granted or denied by an earlier ACE. Removing the
2270 * discovered access or denial enforces this rule. At the end of
2271 * processing the ACEs, all AoI that were found to be denied are
2272 * placed into the working_mode, giving the caller a mask of denied
2273 * accesses. Returns:
2274 * 0 if all AoI granted
2275 * EACCESS if the denied mask is non-zero
2276 * other error if abnormal failure (e.g., IO error)
2278 * A secondary usage of the function is to determine if any of the
2279 * AoI are granted. If an ACE grants any access in
2280 * the working_mode, we immediately short circuit out of the function.
2281 * This mode is chosen by setting anyaccess to B_TRUE. The
2282 * working_mode is not a denied access mask upon exit if the function
2283 * is used in this manner.
2286 zfs_zaccess_aces_check(znode_t *zp, uint32_t *working_mode,
2287 boolean_t anyaccess, cred_t *cr)
2289 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2292 uid_t uid = crgetuid(cr);
2294 uint16_t type, iflags;
2295 uint16_t entry_type;
2296 uint32_t access_mask;
2297 uint32_t deny_mask = 0;
2298 zfs_ace_hdr_t *acep = NULL;
2303 zfs_fuid_map_ids(zp, cr, &fowner, &gowner);
2305 mutex_enter(&zp->z_acl_lock);
2307 error = zfs_acl_node_read(zp, &aclp, B_FALSE);
2309 mutex_exit(&zp->z_acl_lock);
2313 while (acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
2315 uint32_t mask_matched;
2317 if (!zfs_acl_valid_ace_type(type, iflags))
2320 if (ZTOV(zp)->v_type == VDIR && (iflags & ACE_INHERIT_ONLY_ACE))
2323 /* Skip ACE if it does not affect any AoI */
2324 mask_matched = (access_mask & *working_mode);
2328 entry_type = (iflags & ACE_TYPE_FLAGS);
2332 switch (entry_type) {
2340 case ACE_IDENTIFIER_GROUP:
2341 checkit = zfs_groupmember(zfsvfs, who, cr);
2349 if (entry_type == 0) {
2352 newid = zfs_fuid_map_id(zfsvfs, who, cr,
2354 if (newid != IDMAP_WK_CREATOR_OWNER_UID &&
2359 mutex_exit(&zp->z_acl_lock);
2366 DTRACE_PROBE3(zfs__ace__denies,
2368 zfs_ace_hdr_t *, acep,
2369 uint32_t, mask_matched);
2370 deny_mask |= mask_matched;
2372 DTRACE_PROBE3(zfs__ace__allows,
2374 zfs_ace_hdr_t *, acep,
2375 uint32_t, mask_matched);
2377 mutex_exit(&zp->z_acl_lock);
2381 *working_mode &= ~mask_matched;
2385 if (*working_mode == 0)
2389 mutex_exit(&zp->z_acl_lock);
2391 /* Put the found 'denies' back on the working mode */
2393 *working_mode |= deny_mask;
2395 } else if (*working_mode) {
2403 * Return true if any access whatsoever granted, we don't actually
2404 * care what access is granted.
2407 zfs_has_access(znode_t *zp, cred_t *cr)
2409 uint32_t have = ACE_ALL_PERMS;
2411 if (zfs_zaccess_aces_check(zp, &have, B_TRUE, cr) != 0) {
2414 owner = zfs_fuid_map_id(zp->z_zfsvfs,
2415 zp->z_phys->zp_uid, cr, ZFS_OWNER);
2418 secpolicy_vnode_access(cr, ZTOV(zp), owner, VREAD) == 0 ||
2419 secpolicy_vnode_access(cr, ZTOV(zp), owner, VWRITE) == 0 ||
2420 secpolicy_vnode_access(cr, ZTOV(zp), owner, VEXEC) == 0 ||
2421 secpolicy_vnode_chown(ZTOV(zp), cr, owner) == 0 ||
2422 secpolicy_vnode_setdac(ZTOV(zp), cr, owner) == 0 ||
2423 secpolicy_vnode_remove(ZTOV(zp), cr) == 0);
2429 zfs_zaccess_common(znode_t *zp, uint32_t v4_mode, uint32_t *working_mode,
2430 boolean_t *check_privs, boolean_t skipaclchk, cred_t *cr)
2432 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2435 *working_mode = v4_mode;
2436 *check_privs = B_TRUE;
2439 * Short circuit empty requests
2441 if (v4_mode == 0 || zfsvfs->z_replay) {
2446 if ((err = zfs_zaccess_dataset_check(zp, v4_mode)) != 0) {
2447 *check_privs = B_FALSE;
2452 * The caller requested that the ACL check be skipped. This
2453 * would only happen if the caller checked VOP_ACCESS() with a
2454 * 32 bit ACE mask and already had the appropriate permissions.
2461 return (zfs_zaccess_aces_check(zp, working_mode, B_FALSE, cr));
2465 zfs_zaccess_append(znode_t *zp, uint32_t *working_mode, boolean_t *check_privs,
2468 if (*working_mode != ACE_WRITE_DATA)
2471 return (zfs_zaccess_common(zp, ACE_APPEND_DATA, working_mode,
2472 check_privs, B_FALSE, cr));
2476 zfs_fastaccesschk_execute(znode_t *zdp, cred_t *cr)
2478 boolean_t owner = B_FALSE;
2479 boolean_t groupmbr = B_FALSE;
2483 uid_t uid = crgetuid(cr);
2486 if (zdp->z_phys->zp_flags & ZFS_AV_QUARANTINED)
2489 is_attr = ((zdp->z_phys->zp_flags & ZFS_XATTR) &&
2490 (ZTOV(zdp)->v_type == VDIR));
2494 mutex_enter(&zdp->z_acl_lock);
2496 if (zdp->z_phys->zp_flags & ZFS_NO_EXECS_DENIED) {
2497 mutex_exit(&zdp->z_acl_lock);
2501 if (FUID_INDEX(zdp->z_phys->zp_uid) != 0 ||
2502 FUID_INDEX(zdp->z_phys->zp_gid) != 0) {
2503 mutex_exit(&zdp->z_acl_lock);
2507 fowner = (uid_t)zdp->z_phys->zp_uid;
2508 gowner = (uid_t)zdp->z_phys->zp_gid;
2510 if (uid == fowner) {
2512 if (zdp->z_phys->zp_mode & S_IXUSR) {
2513 mutex_exit(&zdp->z_acl_lock);
2516 mutex_exit(&zdp->z_acl_lock);
2520 if (groupmember(gowner, cr)) {
2522 if (zdp->z_phys->zp_mode & S_IXGRP) {
2523 mutex_exit(&zdp->z_acl_lock);
2526 mutex_exit(&zdp->z_acl_lock);
2530 if (!owner && !groupmbr) {
2531 if (zdp->z_phys->zp_mode & S_IXOTH) {
2532 mutex_exit(&zdp->z_acl_lock);
2537 mutex_exit(&zdp->z_acl_lock);
2540 DTRACE_PROBE(zfs__fastpath__execute__access__miss);
2541 ZFS_ENTER(zdp->z_zfsvfs);
2542 error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr);
2543 ZFS_EXIT(zdp->z_zfsvfs);
2548 * Determine whether Access should be granted/denied, invoking least
2549 * priv subsytem when a deny is determined.
2552 zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr)
2554 uint32_t working_mode;
2557 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2558 boolean_t check_privs;
2560 znode_t *check_zp = zp;
2562 is_attr = ((zp->z_phys->zp_flags & ZFS_XATTR) &&
2563 (ZTOV(zp)->v_type == VDIR));
2567 * In FreeBSD, we don't care about permissions of individual ADS.
2568 * Note that not checking them is not just an optimization - without
2569 * this shortcut, EA operations may bogusly fail with EACCES.
2571 if (zp->z_phys->zp_flags & ZFS_XATTR)
2575 * If attribute then validate against base file
2578 if ((error = zfs_zget(zp->z_zfsvfs,
2579 zp->z_phys->zp_parent, &xzp)) != 0) {
2586 * fixup mode to map to xattr perms
2589 if (mode & (ACE_WRITE_DATA|ACE_APPEND_DATA)) {
2590 mode &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
2591 mode |= ACE_WRITE_NAMED_ATTRS;
2594 if (mode & (ACE_READ_DATA|ACE_EXECUTE)) {
2595 mode &= ~(ACE_READ_DATA|ACE_EXECUTE);
2596 mode |= ACE_READ_NAMED_ATTRS;
2601 if ((error = zfs_zaccess_common(check_zp, mode, &working_mode,
2602 &check_privs, skipaclchk, cr)) == 0) {
2608 if (error && !check_privs) {
2614 if (error && (flags & V_APPEND)) {
2615 error = zfs_zaccess_append(zp, &working_mode, &check_privs, cr);
2618 if (error && check_privs) {
2620 mode_t checkmode = 0;
2622 owner = zfs_fuid_map_id(zfsvfs, check_zp->z_phys->zp_uid, cr,
2626 * First check for implicit owner permission on
2627 * read_acl/read_attributes
2631 ASSERT(working_mode != 0);
2633 if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES) &&
2634 owner == crgetuid(cr)))
2635 working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES);
2637 if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS|
2638 ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE))
2640 if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
2641 ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
2642 checkmode |= VWRITE;
2643 if (working_mode & ACE_EXECUTE)
2647 error = secpolicy_vnode_access(cr, ZTOV(check_zp),
2650 if (error == 0 && (working_mode & ACE_WRITE_OWNER))
2651 error = secpolicy_vnode_chown(ZTOV(check_zp), cr, owner);
2652 if (error == 0 && (working_mode & ACE_WRITE_ACL))
2653 error = secpolicy_vnode_setdac(ZTOV(check_zp), cr, owner);
2655 if (error == 0 && (working_mode &
2656 (ACE_DELETE|ACE_DELETE_CHILD)))
2657 error = secpolicy_vnode_remove(ZTOV(check_zp), cr);
2659 if (error == 0 && (working_mode & ACE_SYNCHRONIZE)) {
2660 error = secpolicy_vnode_chown(ZTOV(check_zp), cr, owner);
2664 * See if any bits other than those already checked
2665 * for are still present. If so then return EACCES
2667 if (working_mode & ~(ZFS_CHECKED_MASKS)) {
2680 * Translate traditional unix VREAD/VWRITE/VEXEC mode into
2681 * native ACL format and call zfs_zaccess()
2684 zfs_zaccess_rwx(znode_t *zp, mode_t mode, int flags, cred_t *cr)
2686 return (zfs_zaccess(zp, zfs_unix_to_v4(mode >> 6), flags, B_FALSE, cr));
2690 * Access function for secpolicy_vnode_setattr
2693 zfs_zaccess_unix(znode_t *zp, mode_t mode, cred_t *cr)
2695 int v4_mode = zfs_unix_to_v4(mode >> 6);
2697 return (zfs_zaccess(zp, v4_mode, 0, B_FALSE, cr));
2701 zfs_delete_final_check(znode_t *zp, znode_t *dzp,
2702 mode_t missing_perms, cred_t *cr)
2706 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2708 downer = zfs_fuid_map_id(zfsvfs, dzp->z_phys->zp_uid, cr, ZFS_OWNER);
2710 error = secpolicy_vnode_access(cr, ZTOV(dzp), downer, missing_perms);
2713 error = zfs_sticky_remove_access(dzp, zp, cr);
2719 * Determine whether Access should be granted/deny, without
2720 * consulting least priv subsystem.
2723 * The following chart is the recommended NFSv4 enforcement for
2724 * ability to delete an object.
2726 * -------------------------------------------------------
2727 * | Parent Dir | Target Object Permissions |
2729 * -------------------------------------------------------
2730 * | | ACL Allows | ACL Denies| Delete |
2731 * | | Delete | Delete | unspecified|
2732 * -------------------------------------------------------
2733 * | ACL Allows | Permit | Permit | Permit |
2734 * | DELETE_CHILD | |
2735 * -------------------------------------------------------
2736 * | ACL Denies | Permit | Deny | Deny |
2737 * | DELETE_CHILD | | | |
2738 * -------------------------------------------------------
2739 * | ACL specifies | | | |
2740 * | only allow | Permit | Permit | Permit |
2741 * | write and | | | |
2743 * -------------------------------------------------------
2744 * | ACL denies | | | |
2745 * | write and | Permit | Deny | Deny |
2747 * -------------------------------------------------------
2750 * No search privilege, can't even look up file?
2754 zfs_zaccess_delete(znode_t *dzp, znode_t *zp, cred_t *cr)
2756 uint32_t dzp_working_mode = 0;
2757 uint32_t zp_working_mode = 0;
2758 int dzp_error, zp_error;
2759 mode_t missing_perms;
2760 boolean_t dzpcheck_privs = B_TRUE;
2761 boolean_t zpcheck_privs = B_TRUE;
2764 * We want specific DELETE permissions to
2765 * take precedence over WRITE/EXECUTE. We don't
2766 * want an ACL such as this to mess us up.
2767 * user:joe:write_data:deny,user:joe:delete:allow
2769 * However, deny permissions may ultimately be overridden
2770 * by secpolicy_vnode_access().
2772 * We will ask for all of the necessary permissions and then
2773 * look at the working modes from the directory and target object
2774 * to determine what was found.
2777 if (zp->z_phys->zp_flags & (ZFS_IMMUTABLE | ZFS_NOUNLINK))
2782 * If the directory permissions allow the delete, we are done.
2784 if ((dzp_error = zfs_zaccess_common(dzp, ACE_DELETE_CHILD,
2785 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0)
2789 * If target object has delete permission then we are done
2791 if ((zp_error = zfs_zaccess_common(zp, ACE_DELETE, &zp_working_mode,
2792 &zpcheck_privs, B_FALSE, cr)) == 0)
2795 ASSERT(dzp_error && zp_error);
2797 if (!dzpcheck_privs)
2805 * If directory returns EACCES then delete_child was denied
2806 * due to deny delete_child. In this case send the request through
2807 * secpolicy_vnode_remove(). We don't use zfs_delete_final_check()
2808 * since that *could* allow the delete based on write/execute permission
2809 * and we want delete permissions to override write/execute.
2812 if (dzp_error == EACCES)
2813 return (secpolicy_vnode_remove(ZTOV(dzp), cr)); /* XXXPJD: s/dzp/zp/ ? */
2817 * only need to see if we have write/execute on directory.
2820 if ((dzp_error = zfs_zaccess_common(dzp, ACE_EXECUTE|ACE_WRITE_DATA,
2821 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0)
2822 return (zfs_sticky_remove_access(dzp, zp, cr));
2824 if (!dzpcheck_privs)
2831 missing_perms = (dzp_working_mode & ACE_WRITE_DATA) ? VWRITE : 0;
2832 missing_perms |= (dzp_working_mode & ACE_EXECUTE) ? VEXEC : 0;
2834 ASSERT(missing_perms);
2836 return (zfs_delete_final_check(zp, dzp, missing_perms, cr));
2841 zfs_zaccess_rename(znode_t *sdzp, znode_t *szp, znode_t *tdzp,
2842 znode_t *tzp, cred_t *cr)
2847 if (szp->z_phys->zp_flags & ZFS_AV_QUARANTINED)
2850 add_perm = (ZTOV(szp)->v_type == VDIR) ?
2851 ACE_ADD_SUBDIRECTORY : ACE_ADD_FILE;
2854 * Rename permissions are combination of delete permission +
2855 * add file/subdir permission.
2857 * BSD operating systems also require write permission
2858 * on the directory being moved from one parent directory
2861 if (ZTOV(szp)->v_type == VDIR && ZTOV(sdzp) != ZTOV(tdzp)) {
2862 if (error = zfs_zaccess(szp, ACE_WRITE_DATA, 0, B_FALSE, cr))
2867 * first make sure we do the delete portion.
2869 * If that succeeds then check for add_file/add_subdir permissions
2872 if (error = zfs_zaccess_delete(sdzp, szp, cr))
2876 * If we have a tzp, see if we can delete it?
2879 if (error = zfs_zaccess_delete(tdzp, tzp, cr))
2884 * Now check for add permissions
2886 error = zfs_zaccess(tdzp, add_perm, 0, B_FALSE, cr);