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 2008 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
26 #pragma ident "@(#)zfs_acl.c 1.25 08/04/08 SMI"
28 #include <sys/types.h>
29 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/sysmacros.h>
33 #include <sys/resource.h>
35 #include <sys/vnode.h>
40 #include <sys/cmn_err.h>
41 #include <sys/errno.h>
42 #include <sys/unistd.h>
44 #include <sys/fs/zfs.h>
46 #include <sys/policy.h>
47 #include <sys/zfs_znode.h>
48 #include <sys/zfs_fuid.h>
49 #include <sys/zfs_acl.h>
50 #include <sys/zfs_dir.h>
51 #include <sys/zfs_vfsops.h>
53 #include <sys/dnode.h>
55 #include "fs/fs_subr.h"
56 #include <acl/acl_common.h>
58 #define ALLOW ACE_ACCESS_ALLOWED_ACE_TYPE
59 #define DENY ACE_ACCESS_DENIED_ACE_TYPE
60 #define MAX_ACE_TYPE ACE_SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE
62 #define OWNING_GROUP (ACE_GROUP|ACE_IDENTIFIER_GROUP)
63 #define EVERYONE_ALLOW_MASK (ACE_READ_ACL|ACE_READ_ATTRIBUTES | \
64 ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE)
65 #define EVERYONE_DENY_MASK (ACE_WRITE_ACL|ACE_WRITE_OWNER | \
66 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
67 #define OWNER_ALLOW_MASK (ACE_WRITE_ACL | ACE_WRITE_OWNER | \
68 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
69 #define WRITE_MASK_DATA (ACE_WRITE_DATA|ACE_APPEND_DATA|ACE_WRITE_NAMED_ATTRS)
71 #define ZFS_CHECKED_MASKS (ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_READ_DATA| \
72 ACE_READ_NAMED_ATTRS|ACE_WRITE_DATA|ACE_WRITE_ATTRIBUTES| \
73 ACE_WRITE_NAMED_ATTRS|ACE_APPEND_DATA|ACE_EXECUTE|ACE_WRITE_OWNER| \
74 ACE_WRITE_ACL|ACE_DELETE|ACE_DELETE_CHILD|ACE_SYNCHRONIZE)
76 #define WRITE_MASK (WRITE_MASK_DATA|ACE_WRITE_ATTRIBUTES|ACE_WRITE_ACL|\
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
== (ACE_GROUP
| ACE_IDENTIFIER_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_ace_valid(vtype_t obj_type
, zfs_acl_t
*aclp
, uint16_t type
, uint16_t iflags
)
402 * first check type of entry
405 switch (iflags
& ACE_TYPE_FLAGS
) {
407 case (ACE_IDENTIFIER_GROUP
| ACE_GROUP
):
408 case ACE_IDENTIFIER_GROUP
:
410 case 0: /* User entry */
418 * next check inheritance level flags
421 if (type
!= ALLOW
&& type
> MAX_ACE_TYPE
) {
426 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE
:
427 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE
:
428 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE
:
429 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE
:
430 if (aclp
->z_version
< ZFS_ACL_VERSION_FUID
)
432 aclp
->z_hints
|= ZFS_ACL_OBJ_ACE
;
436 * Only directories should have inheritance flags.
438 if (obj_type
!= VDIR
&& (iflags
&
439 (ACE_FILE_INHERIT_ACE
|ACE_DIRECTORY_INHERIT_ACE
|
440 ACE_INHERIT_ONLY_ACE
|ACE_NO_PROPAGATE_INHERIT_ACE
))) {
444 if (iflags
& (ACE_FILE_INHERIT_ACE
|ACE_DIRECTORY_INHERIT_ACE
))
445 aclp
->z_hints
|= ZFS_INHERIT_ACE
;
447 if (iflags
& (ACE_INHERIT_ONLY_ACE
|ACE_NO_PROPAGATE_INHERIT_ACE
)) {
448 if ((iflags
& (ACE_FILE_INHERIT_ACE
|
449 ACE_DIRECTORY_INHERIT_ACE
)) == 0) {
458 zfs_acl_next_ace(zfs_acl_t
*aclp
, void *start
, uint64_t *who
,
459 uint32_t *access_mask
, uint16_t *iflags
, uint16_t *type
)
461 zfs_acl_node_t
*aclnode
;
464 aclnode
= list_head(&aclp
->z_acl
);
468 aclp
->z_next_ace
= aclnode
->z_acldata
;
469 aclp
->z_curr_node
= aclnode
;
470 aclnode
->z_ace_idx
= 0;
473 aclnode
= aclp
->z_curr_node
;
478 if (aclnode
->z_ace_idx
>= aclnode
->z_ace_count
) {
479 aclnode
= list_next(&aclp
->z_acl
, aclnode
);
483 aclp
->z_curr_node
= aclnode
;
484 aclnode
->z_ace_idx
= 0;
485 aclp
->z_next_ace
= aclnode
->z_acldata
;
489 if (aclnode
->z_ace_idx
< aclnode
->z_ace_count
) {
490 void *acep
= aclp
->z_next_ace
;
491 *iflags
= aclp
->z_ops
.ace_flags_get(acep
);
492 *type
= aclp
->z_ops
.ace_type_get(acep
);
493 *access_mask
= aclp
->z_ops
.ace_mask_get(acep
);
494 *who
= aclp
->z_ops
.ace_who_get(acep
);
495 aclp
->z_next_ace
= (caddr_t
)aclp
->z_next_ace
+
496 aclp
->z_ops
.ace_size(acep
);
497 aclnode
->z_ace_idx
++;
498 return ((void *)acep
);
505 zfs_ace_walk(void *datap
, uint64_t cookie
, int aclcnt
,
506 uint16_t *flags
, uint16_t *type
, uint32_t *mask
)
508 zfs_acl_t
*aclp
= datap
;
509 zfs_ace_hdr_t
*acep
= (zfs_ace_hdr_t
*)(uintptr_t)cookie
;
512 acep
= zfs_acl_next_ace(aclp
, acep
, &who
, mask
,
514 return ((uint64_t)(uintptr_t)acep
);
517 static zfs_acl_node_t
*
518 zfs_acl_curr_node(zfs_acl_t
*aclp
)
520 ASSERT(aclp
->z_curr_node
);
521 return (aclp
->z_curr_node
);
525 * Copy ACE to internal ZFS format.
526 * While processing the ACL each ACE will be validated for correctness.
527 * ACE FUIDs will be created later.
530 zfs_copy_ace_2_fuid(vtype_t obj_type
, zfs_acl_t
*aclp
, void *datap
,
531 zfs_ace_t
*z_acl
, int aclcnt
, size_t *size
)
535 zfs_ace_t
*aceptr
= z_acl
;
537 zfs_object_ace_t
*zobjacep
;
538 ace_object_t
*aceobjp
;
540 for (i
= 0; i
!= aclcnt
; i
++) {
541 aceptr
->z_hdr
.z_access_mask
= acep
->a_access_mask
;
542 aceptr
->z_hdr
.z_flags
= acep
->a_flags
;
543 aceptr
->z_hdr
.z_type
= acep
->a_type
;
544 entry_type
= aceptr
->z_hdr
.z_flags
& ACE_TYPE_FLAGS
;
545 if (entry_type
!= ACE_OWNER
&& entry_type
!= OWNING_GROUP
&&
546 entry_type
!= ACE_EVERYONE
) {
547 if (!aclp
->z_has_fuids
)
548 aclp
->z_has_fuids
= IS_EPHEMERAL(acep
->a_who
);
549 aceptr
->z_fuid
= (uint64_t)acep
->a_who
;
553 * Make sure ACE is valid
555 if (zfs_ace_valid(obj_type
, aclp
, aceptr
->z_hdr
.z_type
,
556 aceptr
->z_hdr
.z_flags
) != B_TRUE
)
559 switch (acep
->a_type
) {
560 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE
:
561 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE
:
562 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE
:
563 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE
:
564 zobjacep
= (zfs_object_ace_t
*)aceptr
;
565 aceobjp
= (ace_object_t
*)acep
;
567 bcopy(aceobjp
->a_obj_type
, zobjacep
->z_object_type
,
568 sizeof (aceobjp
->a_obj_type
));
569 bcopy(aceobjp
->a_inherit_obj_type
,
570 zobjacep
->z_inherit_type
,
571 sizeof (aceobjp
->a_inherit_obj_type
));
572 acep
= (ace_t
*)((caddr_t
)acep
+ sizeof (ace_object_t
));
575 acep
= (ace_t
*)((caddr_t
)acep
+ sizeof (ace_t
));
578 aceptr
= (zfs_ace_t
*)((caddr_t
)aceptr
+
579 aclp
->z_ops
.ace_size(aceptr
));
582 *size
= (caddr_t
)aceptr
- (caddr_t
)z_acl
;
588 * Copy ZFS ACEs to fixed size ace_t layout
591 zfs_copy_fuid_2_ace(zfsvfs_t
*zfsvfs
, zfs_acl_t
*aclp
, cred_t
*cr
,
592 void *datap
, int filter
)
595 uint32_t access_mask
;
596 uint16_t iflags
, type
;
597 zfs_ace_hdr_t
*zacep
= NULL
;
599 ace_object_t
*objacep
;
600 zfs_object_ace_t
*zobjacep
;
604 while (zacep
= zfs_acl_next_ace(aclp
, zacep
,
605 &who
, &access_mask
, &iflags
, &type
)) {
608 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE
:
609 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE
:
610 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE
:
611 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE
:
615 zobjacep
= (zfs_object_ace_t
*)zacep
;
616 objacep
= (ace_object_t
*)acep
;
617 bcopy(zobjacep
->z_object_type
,
619 sizeof (zobjacep
->z_object_type
));
620 bcopy(zobjacep
->z_inherit_type
,
621 objacep
->a_inherit_obj_type
,
622 sizeof (zobjacep
->z_inherit_type
));
623 ace_size
= sizeof (ace_object_t
);
626 ace_size
= sizeof (ace_t
);
630 entry_type
= (iflags
& ACE_TYPE_FLAGS
);
631 if ((entry_type
!= ACE_OWNER
&&
632 entry_type
!= (ACE_GROUP
| ACE_IDENTIFIER_GROUP
) &&
633 entry_type
!= ACE_EVERYONE
)) {
634 acep
->a_who
= zfs_fuid_map_id(zfsvfs
, who
,
635 cr
, (entry_type
& ACE_IDENTIFIER_GROUP
) ?
636 ZFS_ACE_GROUP
: ZFS_ACE_USER
);
638 acep
->a_who
= (uid_t
)(int64_t)who
;
640 acep
->a_access_mask
= access_mask
;
641 acep
->a_flags
= iflags
;
643 acep
= (ace_t
*)((caddr_t
)acep
+ ace_size
);
648 zfs_copy_ace_2_oldace(vtype_t obj_type
, zfs_acl_t
*aclp
, ace_t
*acep
,
649 zfs_oldace_t
*z_acl
, int aclcnt
, size_t *size
)
652 zfs_oldace_t
*aceptr
= z_acl
;
654 for (i
= 0; i
!= aclcnt
; i
++, aceptr
++) {
655 aceptr
->z_access_mask
= acep
[i
].a_access_mask
;
656 aceptr
->z_type
= acep
[i
].a_type
;
657 aceptr
->z_flags
= acep
[i
].a_flags
;
658 aceptr
->z_fuid
= acep
[i
].a_who
;
660 * Make sure ACE is valid
662 if (zfs_ace_valid(obj_type
, aclp
, aceptr
->z_type
,
663 aceptr
->z_flags
) != B_TRUE
)
666 *size
= (caddr_t
)aceptr
- (caddr_t
)z_acl
;
671 * convert old ACL format to new
674 zfs_acl_xform(znode_t
*zp
, zfs_acl_t
*aclp
)
676 zfs_oldace_t
*oldaclp
;
678 uint16_t type
, iflags
;
679 uint32_t access_mask
;
682 zfs_acl_node_t
*newaclnode
;
684 ASSERT(aclp
->z_version
== ZFS_ACL_VERSION_INITIAL
);
686 * First create the ACE in a contiguous piece of memory
687 * for zfs_copy_ace_2_fuid().
689 * We only convert an ACL once, so this won't happen
692 oldaclp
= kmem_alloc(sizeof (zfs_oldace_t
) * aclp
->z_acl_count
,
695 while (cookie
= zfs_acl_next_ace(aclp
, cookie
, &who
,
696 &access_mask
, &iflags
, &type
)) {
697 oldaclp
[i
].z_flags
= iflags
;
698 oldaclp
[i
].z_type
= type
;
699 oldaclp
[i
].z_fuid
= who
;
700 oldaclp
[i
++].z_access_mask
= access_mask
;
703 newaclnode
= zfs_acl_node_alloc(aclp
->z_acl_count
*
704 sizeof (zfs_object_ace_t
));
705 aclp
->z_ops
= zfs_acl_fuid_ops
;
706 VERIFY(zfs_copy_ace_2_fuid(ZTOV(zp
)->v_type
, aclp
, oldaclp
,
707 newaclnode
->z_acldata
, aclp
->z_acl_count
,
708 &newaclnode
->z_size
) == 0);
709 newaclnode
->z_ace_count
= aclp
->z_acl_count
;
710 aclp
->z_version
= ZFS_ACL_VERSION
;
711 kmem_free(oldaclp
, aclp
->z_acl_count
* sizeof (zfs_oldace_t
));
714 * Release all previous ACL nodes
717 zfs_acl_release_nodes(aclp
);
719 list_insert_head(&aclp
->z_acl
, newaclnode
);
721 aclp
->z_acl_bytes
= newaclnode
->z_size
;
722 aclp
->z_acl_count
= newaclnode
->z_ace_count
;
727 * Convert unix access mask to v4 access mask
730 zfs_unix_to_v4(uint32_t access_mask
)
732 uint32_t new_mask
= 0;
734 if (access_mask
& S_IXOTH
)
735 new_mask
|= ACE_EXECUTE
;
736 if (access_mask
& S_IWOTH
)
737 new_mask
|= ACE_WRITE_DATA
;
738 if (access_mask
& S_IROTH
)
739 new_mask
|= ACE_READ_DATA
;
744 zfs_set_ace(zfs_acl_t
*aclp
, void *acep
, uint32_t access_mask
,
745 uint16_t access_type
, uint64_t fuid
, uint16_t entry_type
)
747 uint16_t type
= entry_type
& ACE_TYPE_FLAGS
;
749 aclp
->z_ops
.ace_mask_set(acep
, access_mask
);
750 aclp
->z_ops
.ace_type_set(acep
, access_type
);
751 aclp
->z_ops
.ace_flags_set(acep
, entry_type
);
752 if ((type
!= ACE_OWNER
&& type
!= (ACE_GROUP
| ACE_IDENTIFIER_GROUP
) &&
753 type
!= ACE_EVERYONE
))
754 aclp
->z_ops
.ace_who_set(acep
, fuid
);
758 * Determine mode of file based on ACL.
759 * Also, create FUIDs for any User/Group ACEs
762 zfs_mode_fuid_compute(znode_t
*zp
, zfs_acl_t
*aclp
, cred_t
*cr
,
763 zfs_fuid_info_t
**fuidp
, dmu_tx_t
*tx
)
768 zfs_ace_hdr_t
*acep
= NULL
;
770 uint16_t iflags
, type
;
771 uint32_t access_mask
;
773 mode
= (zp
->z_phys
->zp_mode
& (S_IFMT
| S_ISUID
| S_ISGID
| S_ISVTX
));
775 while (acep
= zfs_acl_next_ace(aclp
, acep
, &who
,
776 &access_mask
, &iflags
, &type
)) {
779 * Skip over inherit only ACEs
781 if (iflags
& ACE_INHERIT_ONLY_ACE
)
784 entry_type
= (iflags
& ACE_TYPE_FLAGS
);
786 if (entry_type
== ACE_OWNER
) {
787 if ((access_mask
& ACE_READ_DATA
) &&
788 (!(seen
& S_IRUSR
))) {
794 if ((access_mask
& ACE_WRITE_DATA
) &&
795 (!(seen
& S_IWUSR
))) {
801 if ((access_mask
& ACE_EXECUTE
) &&
802 (!(seen
& S_IXUSR
))) {
808 } else if (entry_type
== OWNING_GROUP
) {
809 if ((access_mask
& ACE_READ_DATA
) &&
810 (!(seen
& S_IRGRP
))) {
816 if ((access_mask
& ACE_WRITE_DATA
) &&
817 (!(seen
& S_IWGRP
))) {
823 if ((access_mask
& ACE_EXECUTE
) &&
824 (!(seen
& S_IXGRP
))) {
830 } else if (entry_type
== ACE_EVERYONE
) {
831 if ((access_mask
& ACE_READ_DATA
)) {
832 if (!(seen
& S_IRUSR
)) {
838 if (!(seen
& S_IRGRP
)) {
844 if (!(seen
& S_IROTH
)) {
851 if ((access_mask
& ACE_WRITE_DATA
)) {
852 if (!(seen
& S_IWUSR
)) {
858 if (!(seen
& S_IWGRP
)) {
864 if (!(seen
& S_IWOTH
)) {
871 if ((access_mask
& ACE_EXECUTE
)) {
872 if (!(seen
& S_IXUSR
)) {
878 if (!(seen
& S_IXGRP
)) {
884 if (!(seen
& S_IXOTH
)) {
893 * Now handle FUID create for user/group ACEs
895 if (entry_type
== 0 || entry_type
== ACE_IDENTIFIER_GROUP
) {
896 aclp
->z_ops
.ace_who_set(acep
,
897 zfs_fuid_create(zp
->z_zfsvfs
, who
, cr
,
898 (entry_type
== 0) ? ZFS_ACE_USER
: ZFS_ACE_GROUP
,
906 zfs_acl_node_read_internal(znode_t
*zp
, boolean_t will_modify
)
909 zfs_acl_node_t
*aclnode
;
911 aclp
= zfs_acl_alloc(zp
->z_phys
->zp_acl
.z_acl_version
);
914 * Version 0 to 1 znode_acl_phys has the size/count fields swapped.
915 * Version 0 didn't have a size field, only a count.
917 if (zp
->z_phys
->zp_acl
.z_acl_version
== ZFS_ACL_VERSION_INITIAL
) {
918 aclp
->z_acl_count
= zp
->z_phys
->zp_acl
.z_acl_size
;
919 aclp
->z_acl_bytes
= ZFS_ACL_SIZE(aclp
->z_acl_count
);
921 aclp
->z_acl_count
= zp
->z_phys
->zp_acl
.z_acl_count
;
922 aclp
->z_acl_bytes
= zp
->z_phys
->zp_acl
.z_acl_size
;
925 aclnode
= zfs_acl_node_alloc(will_modify
? aclp
->z_acl_bytes
: 0);
926 aclnode
->z_ace_count
= aclp
->z_acl_count
;
928 bcopy(zp
->z_phys
->zp_acl
.z_ace_data
, aclnode
->z_acldata
,
931 aclnode
->z_size
= aclp
->z_acl_bytes
;
932 aclnode
->z_acldata
= &zp
->z_phys
->zp_acl
.z_ace_data
[0];
935 list_insert_head(&aclp
->z_acl
, aclnode
);
941 * Read an external acl object.
944 zfs_acl_node_read(znode_t
*zp
, zfs_acl_t
**aclpp
, boolean_t will_modify
)
946 uint64_t extacl
= zp
->z_phys
->zp_acl
.z_acl_extern_obj
;
950 zfs_acl_node_t
*aclnode
;
953 ASSERT(MUTEX_HELD(&zp
->z_acl_lock
));
955 if (zp
->z_phys
->zp_acl
.z_acl_extern_obj
== 0) {
956 *aclpp
= zfs_acl_node_read_internal(zp
, will_modify
);
960 aclp
= zfs_acl_alloc(zp
->z_phys
->zp_acl
.z_acl_version
);
961 if (zp
->z_phys
->zp_acl
.z_acl_version
== ZFS_ACL_VERSION_INITIAL
) {
962 zfs_acl_phys_v0_t
*zacl0
=
963 (zfs_acl_phys_v0_t
*)&zp
->z_phys
->zp_acl
;
965 aclsize
= ZFS_ACL_SIZE(zacl0
->z_acl_count
);
966 acl_count
= zacl0
->z_acl_count
;
968 aclsize
= zp
->z_phys
->zp_acl
.z_acl_size
;
969 acl_count
= zp
->z_phys
->zp_acl
.z_acl_count
;
971 aclsize
= acl_count
* sizeof (zfs_ace_t
);
973 aclnode
= zfs_acl_node_alloc(aclsize
);
974 list_insert_head(&aclp
->z_acl
, aclnode
);
975 error
= dmu_read(zp
->z_zfsvfs
->z_os
, extacl
, 0,
976 aclsize
, aclnode
->z_acldata
);
977 aclnode
->z_ace_count
= acl_count
;
978 aclp
->z_acl_count
= acl_count
;
979 aclp
->z_acl_bytes
= aclsize
;
991 * common code for setting ACLs.
993 * This function is called from zfs_mode_update, zfs_perm_init, and zfs_setacl.
994 * zfs_setacl passes a non-NULL inherit pointer (ihp) to indicate that it's
995 * already checked the acl and knows whether to inherit.
998 zfs_aclset_common(znode_t
*zp
, zfs_acl_t
*aclp
, cred_t
*cr
,
999 zfs_fuid_info_t
**fuidp
, dmu_tx_t
*tx
)
1002 znode_phys_t
*zphys
= zp
->z_phys
;
1003 zfs_acl_phys_t
*zacl
= &zphys
->zp_acl
;
1004 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1005 uint64_t aoid
= zphys
->zp_acl
.z_acl_extern_obj
;
1007 dmu_object_type_t otype
;
1008 zfs_acl_node_t
*aclnode
;
1010 ASSERT(MUTEX_HELD(&zp
->z_lock
));
1011 ASSERT(MUTEX_HELD(&zp
->z_acl_lock
));
1013 dmu_buf_will_dirty(zp
->z_dbuf
, tx
);
1015 zphys
->zp_mode
= zfs_mode_fuid_compute(zp
, aclp
, cr
, fuidp
, tx
);
1018 * Decide which opbject type to use. If we are forced to
1019 * use old ACL format than transform ACL into zfs_oldace_t
1022 if (!zfsvfs
->z_use_fuids
) {
1023 otype
= DMU_OT_OLDACL
;
1025 if ((aclp
->z_version
== ZFS_ACL_VERSION_INITIAL
) &&
1026 (zfsvfs
->z_version
>= ZPL_VERSION_FUID
))
1027 zfs_acl_xform(zp
, aclp
);
1028 ASSERT(aclp
->z_version
>= ZFS_ACL_VERSION_FUID
);
1032 if (aclp
->z_acl_bytes
> ZFS_ACE_SPACE
) {
1034 * If ACL was previously external and we are now
1035 * converting to new ACL format then release old
1036 * ACL object and create a new one.
1038 if (aoid
&& aclp
->z_version
!= zacl
->z_acl_version
) {
1039 error
= dmu_object_free(zfsvfs
->z_os
,
1040 zp
->z_phys
->zp_acl
.z_acl_extern_obj
, tx
);
1046 aoid
= dmu_object_alloc(zfsvfs
->z_os
,
1047 otype
, aclp
->z_acl_bytes
,
1048 otype
== DMU_OT_ACL
? DMU_OT_SYSACL
: DMU_OT_NONE
,
1049 otype
== DMU_OT_ACL
? DN_MAX_BONUSLEN
: 0, tx
);
1051 (void) dmu_object_set_blocksize(zfsvfs
->z_os
, aoid
,
1052 aclp
->z_acl_bytes
, 0, tx
);
1054 zphys
->zp_acl
.z_acl_extern_obj
= aoid
;
1055 for (aclnode
= list_head(&aclp
->z_acl
); aclnode
;
1056 aclnode
= list_next(&aclp
->z_acl
, aclnode
)) {
1057 if (aclnode
->z_ace_count
== 0)
1059 dmu_write(zfsvfs
->z_os
, aoid
, off
,
1060 aclnode
->z_size
, aclnode
->z_acldata
, tx
);
1061 off
+= aclnode
->z_size
;
1064 void *start
= zacl
->z_ace_data
;
1066 * Migrating back embedded?
1068 if (zphys
->zp_acl
.z_acl_extern_obj
) {
1069 error
= dmu_object_free(zfsvfs
->z_os
,
1070 zp
->z_phys
->zp_acl
.z_acl_extern_obj
, tx
);
1073 zphys
->zp_acl
.z_acl_extern_obj
= 0;
1076 for (aclnode
= list_head(&aclp
->z_acl
); aclnode
;
1077 aclnode
= list_next(&aclp
->z_acl
, aclnode
)) {
1078 if (aclnode
->z_ace_count
== 0)
1080 bcopy(aclnode
->z_acldata
, start
, aclnode
->z_size
);
1081 start
= (caddr_t
)start
+ aclnode
->z_size
;
1086 * If Old version then swap count/bytes to match old
1087 * layout of znode_acl_phys_t.
1089 if (aclp
->z_version
== ZFS_ACL_VERSION_INITIAL
) {
1090 zphys
->zp_acl
.z_acl_size
= aclp
->z_acl_count
;
1091 zphys
->zp_acl
.z_acl_count
= aclp
->z_acl_bytes
;
1093 zphys
->zp_acl
.z_acl_size
= aclp
->z_acl_bytes
;
1094 zphys
->zp_acl
.z_acl_count
= aclp
->z_acl_count
;
1097 zphys
->zp_acl
.z_acl_version
= aclp
->z_version
;
1100 * Replace ACL wide bits, but first clear them.
1102 zp
->z_phys
->zp_flags
&= ~ZFS_ACL_WIDE_FLAGS
;
1104 zp
->z_phys
->zp_flags
|= aclp
->z_hints
;
1106 if (ace_trivial_common(aclp
, 0, zfs_ace_walk
) == 0)
1107 zp
->z_phys
->zp_flags
|= ZFS_ACL_TRIVIAL
;
1109 zfs_time_stamper_locked(zp
, STATE_CHANGED
, tx
);
1114 * Update access mask for prepended ACE
1116 * This applies the "groupmask" value for aclmode property.
1119 zfs_acl_prepend_fixup(zfs_acl_t
*aclp
, void *acep
, void *origacep
,
1120 mode_t mode
, uint64_t owner
)
1122 int rmask
, wmask
, xmask
;
1125 uint32_t origmask
, acepmask
;
1128 aceflags
= aclp
->z_ops
.ace_flags_get(acep
);
1129 fuid
= aclp
->z_ops
.ace_who_get(acep
);
1130 origmask
= aclp
->z_ops
.ace_mask_get(origacep
);
1131 acepmask
= aclp
->z_ops
.ace_mask_get(acep
);
1133 user_ace
= (!(aceflags
&
1134 (ACE_OWNER
|ACE_GROUP
|ACE_IDENTIFIER_GROUP
)));
1136 if (user_ace
&& (fuid
== owner
)) {
1146 if (origmask
& ACE_READ_DATA
) {
1148 acepmask
&= ~ACE_READ_DATA
;
1150 acepmask
|= ACE_READ_DATA
;
1154 if (origmask
& ACE_WRITE_DATA
) {
1156 acepmask
&= ~ACE_WRITE_DATA
;
1158 acepmask
|= ACE_WRITE_DATA
;
1162 if (origmask
& ACE_APPEND_DATA
) {
1164 acepmask
&= ~ACE_APPEND_DATA
;
1166 acepmask
|= ACE_APPEND_DATA
;
1170 if (origmask
& ACE_EXECUTE
) {
1172 acepmask
&= ~ACE_EXECUTE
;
1174 acepmask
|= ACE_EXECUTE
;
1177 aclp
->z_ops
.ace_mask_set(acep
, acepmask
);
1181 * Apply mode to canonical six ACEs.
1184 zfs_acl_fixup_canonical_six(zfs_acl_t
*aclp
, mode_t mode
)
1186 zfs_acl_node_t
*aclnode
= list_tail(&aclp
->z_acl
);
1188 int maskoff
= aclp
->z_ops
.ace_mask_off();
1189 size_t abstract_size
= aclp
->z_ops
.ace_abstract_size();
1191 ASSERT(aclnode
!= NULL
);
1193 acep
= (void *)((caddr_t
)aclnode
->z_acldata
+
1194 aclnode
->z_size
- (abstract_size
* 6));
1197 * Fixup final ACEs to match the mode
1200 adjust_ace_pair_common(acep
, maskoff
, abstract_size
,
1201 (mode
& 0700) >> 6); /* owner@ */
1203 acep
= (caddr_t
)acep
+ (abstract_size
* 2);
1205 adjust_ace_pair_common(acep
, maskoff
, abstract_size
,
1206 (mode
& 0070) >> 3); /* group@ */
1208 acep
= (caddr_t
)acep
+ (abstract_size
* 2);
1209 adjust_ace_pair_common(acep
, maskoff
,
1210 abstract_size
, mode
); /* everyone@ */
1215 zfs_acl_ace_match(zfs_acl_t
*aclp
, void *acep
, int allow_deny
,
1216 int entry_type
, int accessmask
)
1218 uint32_t mask
= aclp
->z_ops
.ace_mask_get(acep
);
1219 uint16_t type
= aclp
->z_ops
.ace_type_get(acep
);
1220 uint16_t flags
= aclp
->z_ops
.ace_flags_get(acep
);
1222 return (mask
== accessmask
&& type
== allow_deny
&&
1223 ((flags
& ACE_TYPE_FLAGS
) == entry_type
));
1227 * Can prepended ACE be reused?
1230 zfs_reuse_deny(zfs_acl_t
*aclp
, void *acep
, void *prevacep
)
1236 uint32_t mask
, prevmask
;
1238 if (prevacep
== NULL
)
1241 prevtype
= aclp
->z_ops
.ace_type_get(prevacep
);
1242 prevflags
= aclp
->z_ops
.ace_flags_get(prevacep
);
1243 flags
= aclp
->z_ops
.ace_flags_get(acep
);
1244 mask
= aclp
->z_ops
.ace_mask_get(acep
);
1245 prevmask
= aclp
->z_ops
.ace_mask_get(prevacep
);
1247 if (prevtype
!= DENY
)
1250 if (prevflags
!= (flags
& ACE_IDENTIFIER_GROUP
))
1253 okay_masks
= (mask
& OKAY_MASK_BITS
);
1255 if (prevmask
& ~okay_masks
)
1263 * Insert new ACL node into chain of zfs_acl_node_t's
1265 * This will result in two possible results.
1266 * 1. If the ACL is currently just a single zfs_acl_node and
1267 * we are prepending the entry then current acl node will have
1268 * a new node inserted above it.
1270 * 2. If we are inserting in the middle of current acl node then
1271 * the current node will be split in two and new node will be inserted
1272 * in between the two split nodes.
1274 static zfs_acl_node_t
*
1275 zfs_acl_ace_insert(zfs_acl_t
*aclp
, void *acep
)
1277 zfs_acl_node_t
*newnode
;
1278 zfs_acl_node_t
*trailernode
= NULL
;
1279 zfs_acl_node_t
*currnode
= zfs_acl_curr_node(aclp
);
1280 int curr_idx
= aclp
->z_curr_node
->z_ace_idx
;
1284 newnode
= zfs_acl_node_alloc(aclp
->z_ops
.ace_size(acep
));
1285 newnode
->z_ace_count
= 1;
1287 oldsize
= currnode
->z_size
;
1289 if (curr_idx
!= 1) {
1290 trailernode
= zfs_acl_node_alloc(0);
1291 trailernode
->z_acldata
= acep
;
1293 trailer_count
= currnode
->z_ace_count
- curr_idx
+ 1;
1294 currnode
->z_ace_count
= curr_idx
- 1;
1295 currnode
->z_size
= (caddr_t
)acep
- (caddr_t
)currnode
->z_acldata
;
1296 trailernode
->z_size
= oldsize
- currnode
->z_size
;
1297 trailernode
->z_ace_count
= trailer_count
;
1300 aclp
->z_acl_count
+= 1;
1301 aclp
->z_acl_bytes
+= aclp
->z_ops
.ace_size(acep
);
1304 list_insert_before(&aclp
->z_acl
, currnode
, newnode
);
1306 list_insert_after(&aclp
->z_acl
, currnode
, newnode
);
1308 list_insert_after(&aclp
->z_acl
, newnode
, trailernode
);
1309 aclp
->z_curr_node
= trailernode
;
1310 trailernode
->z_ace_idx
= 1;
1320 zfs_acl_prepend_deny(znode_t
*zp
, zfs_acl_t
*aclp
, void *acep
,
1323 zfs_acl_node_t
*aclnode
;
1328 aclnode
= zfs_acl_ace_insert(aclp
, acep
);
1329 newacep
= aclnode
->z_acldata
;
1330 fuid
= aclp
->z_ops
.ace_who_get(acep
);
1331 flags
= aclp
->z_ops
.ace_flags_get(acep
);
1332 zfs_set_ace(aclp
, newacep
, 0, DENY
, fuid
, (flags
& ACE_TYPE_FLAGS
));
1333 zfs_acl_prepend_fixup(aclp
, newacep
, acep
, mode
, zp
->z_phys
->zp_uid
);
1339 * Split an inherited ACE into inherit_only ACE
1340 * and original ACE with inheritance flags stripped off.
1343 zfs_acl_split_ace(zfs_acl_t
*aclp
, zfs_ace_hdr_t
*acep
)
1345 zfs_acl_node_t
*aclnode
;
1346 zfs_acl_node_t
*currnode
;
1348 uint16_t type
, flags
;
1352 type
= aclp
->z_ops
.ace_type_get(acep
);
1353 flags
= aclp
->z_ops
.ace_flags_get(acep
);
1354 mask
= aclp
->z_ops
.ace_mask_get(acep
);
1355 fuid
= aclp
->z_ops
.ace_who_get(acep
);
1357 aclnode
= zfs_acl_ace_insert(aclp
, acep
);
1358 newacep
= aclnode
->z_acldata
;
1360 aclp
->z_ops
.ace_type_set(newacep
, type
);
1361 aclp
->z_ops
.ace_flags_set(newacep
, flags
| ACE_INHERIT_ONLY_ACE
);
1362 aclp
->z_ops
.ace_mask_set(newacep
, mask
);
1363 aclp
->z_ops
.ace_type_set(newacep
, type
);
1364 aclp
->z_ops
.ace_who_set(newacep
, fuid
);
1365 aclp
->z_next_ace
= acep
;
1366 flags
&= ~ALL_INHERIT
;
1367 aclp
->z_ops
.ace_flags_set(acep
, flags
);
1368 currnode
= zfs_acl_curr_node(aclp
);
1369 ASSERT(currnode
->z_ace_idx
>= 1);
1370 currnode
->z_ace_idx
-= 1;
1374 * Are ACES started at index i, the canonical six ACES?
1377 zfs_have_canonical_six(zfs_acl_t
*aclp
)
1380 zfs_acl_node_t
*aclnode
= list_tail(&aclp
->z_acl
);
1382 size_t abstract_size
= aclp
->z_ops
.ace_abstract_size();
1384 ASSERT(aclnode
!= NULL
);
1386 if (aclnode
->z_ace_count
< 6)
1389 acep
= (void *)((caddr_t
)aclnode
->z_acldata
+
1390 aclnode
->z_size
- (aclp
->z_ops
.ace_abstract_size() * 6));
1392 if ((zfs_acl_ace_match(aclp
, (caddr_t
)acep
+ (abstract_size
* i
++),
1393 DENY
, ACE_OWNER
, 0) &&
1394 zfs_acl_ace_match(aclp
, (caddr_t
)acep
+ (abstract_size
* i
++),
1395 ALLOW
, ACE_OWNER
, OWNER_ALLOW_MASK
) &&
1396 zfs_acl_ace_match(aclp
, (caddr_t
)acep
+ (abstract_size
* i
++), DENY
,
1397 OWNING_GROUP
, 0) && zfs_acl_ace_match(aclp
, (caddr_t
)acep
+
1398 (abstract_size
* i
++),
1399 ALLOW
, OWNING_GROUP
, 0) &&
1400 zfs_acl_ace_match(aclp
, (caddr_t
)acep
+ (abstract_size
* i
++),
1401 DENY
, ACE_EVERYONE
, EVERYONE_DENY_MASK
) &&
1402 zfs_acl_ace_match(aclp
, (caddr_t
)acep
+ (abstract_size
* i
++),
1403 ALLOW
, ACE_EVERYONE
, EVERYONE_ALLOW_MASK
))) {
1412 * Apply step 1g, to group entries
1414 * Need to deal with corner case where group may have
1415 * greater permissions than owner. If so then limit
1416 * group permissions, based on what extra permissions
1420 zfs_fixup_group_entries(zfs_acl_t
*aclp
, void *acep
, void *prevacep
,
1423 uint32_t prevmask
= aclp
->z_ops
.ace_mask_get(prevacep
);
1424 uint32_t mask
= aclp
->z_ops
.ace_mask_get(acep
);
1425 uint16_t prevflags
= aclp
->z_ops
.ace_flags_get(prevacep
);
1426 mode_t extramode
= (mode
>> 3) & 07;
1427 mode_t ownermode
= (mode
>> 6);
1429 if (prevflags
& ACE_IDENTIFIER_GROUP
) {
1431 extramode
&= ~ownermode
;
1434 if (extramode
& S_IROTH
) {
1435 prevmask
&= ~ACE_READ_DATA
;
1436 mask
&= ~ACE_READ_DATA
;
1438 if (extramode
& S_IWOTH
) {
1439 prevmask
&= ~(ACE_WRITE_DATA
|ACE_APPEND_DATA
);
1440 mask
&= ~(ACE_WRITE_DATA
|ACE_APPEND_DATA
);
1442 if (extramode
& S_IXOTH
) {
1443 prevmask
&= ~ACE_EXECUTE
;
1444 mask
&= ~ACE_EXECUTE
;
1448 aclp
->z_ops
.ace_mask_set(acep
, mask
);
1449 aclp
->z_ops
.ace_mask_set(prevacep
, prevmask
);
1453 * Apply the chmod algorithm as described
1457 zfs_acl_chmod(znode_t
*zp
, uint64_t mode
, zfs_acl_t
*aclp
)
1459 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1460 void *acep
= NULL
, *prevacep
= NULL
;
1465 int need_canonical_six
= 1;
1466 uint16_t iflags
, type
;
1467 uint32_t access_mask
;
1469 ASSERT(MUTEX_HELD(&zp
->z_acl_lock
));
1470 ASSERT(MUTEX_HELD(&zp
->z_lock
));
1472 aclp
->z_hints
= (zp
->z_phys
->zp_flags
& V4_ACL_WIDE_FLAGS
);
1475 * If discard then just discard all ACL nodes which
1476 * represent the ACEs.
1478 * New owner@/group@/everone@ ACEs will be added
1481 if (zfsvfs
->z_acl_mode
== ZFS_ACL_DISCARD
)
1482 zfs_acl_release_nodes(aclp
);
1484 while (acep
= zfs_acl_next_ace(aclp
, acep
, &who
, &access_mask
,
1487 entry_type
= (iflags
& ACE_TYPE_FLAGS
);
1488 iflags
= (iflags
& ALL_INHERIT
);
1490 if ((type
!= ALLOW
&& type
!= DENY
) ||
1491 (iflags
& ACE_INHERIT_ONLY_ACE
)) {
1493 aclp
->z_hints
|= ZFS_INHERIT_ACE
;
1495 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE
:
1496 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE
:
1497 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE
:
1498 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE
:
1499 aclp
->z_hints
|= ZFS_ACL_OBJ_ACE
;
1506 * Need to split ace into two?
1508 if ((iflags
& (ACE_FILE_INHERIT_ACE
|
1509 ACE_DIRECTORY_INHERIT_ACE
)) &&
1510 (!(iflags
& ACE_INHERIT_ONLY_ACE
))) {
1511 zfs_acl_split_ace(aclp
, acep
);
1512 aclp
->z_hints
|= ZFS_INHERIT_ACE
;
1516 if (entry_type
== ACE_OWNER
|| entry_type
== ACE_EVERYONE
||
1517 (entry_type
== OWNING_GROUP
)) {
1518 access_mask
&= ~OGE_CLEAR
;
1519 aclp
->z_ops
.ace_mask_set(acep
, access_mask
);
1522 reuse_deny
= B_TRUE
;
1523 if (type
== ALLOW
) {
1526 * Check preceding ACE if any, to see
1527 * if we need to prepend a DENY ACE.
1528 * This is only applicable when the acl_mode
1529 * property == groupmask.
1531 if (zfsvfs
->z_acl_mode
== ZFS_ACL_GROUPMASK
) {
1533 reuse_deny
= zfs_reuse_deny(aclp
, acep
,
1538 zfs_acl_prepend_deny(zp
,
1541 zfs_acl_prepend_fixup(
1544 zp
->z_phys
->zp_uid
);
1546 zfs_fixup_group_entries(aclp
, acep
,
1557 * Check out last six aces, if we have six.
1560 if (aclp
->z_acl_count
>= 6) {
1561 if (zfs_have_canonical_six(aclp
)) {
1562 need_canonical_six
= 0;
1566 if (need_canonical_six
) {
1567 size_t abstract_size
= aclp
->z_ops
.ace_abstract_size();
1569 zfs_acl_node_t
*aclnode
=
1570 zfs_acl_node_alloc(abstract_size
* 6);
1572 aclnode
->z_size
= abstract_size
* 6;
1573 aclnode
->z_ace_count
= 6;
1574 aclp
->z_acl_bytes
+= aclnode
->z_size
;
1575 list_insert_tail(&aclp
->z_acl
, aclnode
);
1577 zacep
= aclnode
->z_acldata
;
1580 zfs_set_ace(aclp
, (caddr_t
)zacep
+ (abstract_size
* i
++),
1581 0, DENY
, -1, ACE_OWNER
);
1582 zfs_set_ace(aclp
, (caddr_t
)zacep
+ (abstract_size
* i
++),
1583 OWNER_ALLOW_MASK
, ALLOW
, -1, ACE_OWNER
);
1584 zfs_set_ace(aclp
, (caddr_t
)zacep
+ (abstract_size
* i
++), 0,
1585 DENY
, -1, OWNING_GROUP
);
1586 zfs_set_ace(aclp
, (caddr_t
)zacep
+ (abstract_size
* i
++), 0,
1587 ALLOW
, -1, OWNING_GROUP
);
1588 zfs_set_ace(aclp
, (caddr_t
)zacep
+ (abstract_size
* i
++),
1589 EVERYONE_DENY_MASK
, DENY
, -1, ACE_EVERYONE
);
1590 zfs_set_ace(aclp
, (caddr_t
)zacep
+ (abstract_size
* i
++),
1591 EVERYONE_ALLOW_MASK
, ALLOW
, -1, ACE_EVERYONE
);
1592 aclp
->z_acl_count
+= 6;
1595 zfs_acl_fixup_canonical_six(aclp
, mode
);
1599 zfs_acl_chmod_setattr(znode_t
*zp
, zfs_acl_t
**aclp
, uint64_t mode
)
1603 mutex_enter(&zp
->z_lock
);
1604 mutex_enter(&zp
->z_acl_lock
);
1606 error
= zfs_acl_node_read(zp
, aclp
, B_TRUE
);
1608 zfs_acl_chmod(zp
, mode
, *aclp
);
1609 mutex_exit(&zp
->z_acl_lock
);
1610 mutex_exit(&zp
->z_lock
);
1615 * strip off write_owner and write_acl
1618 zfs_restricted_update(zfsvfs_t
*zfsvfs
, zfs_acl_t
*aclp
, void *acep
)
1620 uint32_t mask
= aclp
->z_ops
.ace_mask_get(acep
);
1622 if ((zfsvfs
->z_acl_inherit
== ZFS_ACL_RESTRICTED
) &&
1623 (aclp
->z_ops
.ace_type_get(acep
) == ALLOW
)) {
1624 mask
&= ~RESTRICTED_CLEAR
;
1625 aclp
->z_ops
.ace_mask_set(acep
, mask
);
1630 * Should ACE be inherited?
1633 zfs_ace_can_use(znode_t
*zp
, uint16_t acep_flags
)
1635 int vtype
= ZTOV(zp
)->v_type
;
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(znode_t
*zp
, zfs_acl_t
*paclp
, boolean_t
*need_chmod
)
1652 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
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 enum vtype vntype
= ZTOV(zp
)->v_type
;
1665 *need_chmod
= B_TRUE
;
1667 aclp
= zfs_acl_alloc(zfs_acl_version_zp(zp
));
1668 if (zfsvfs
->z_acl_inherit
!= ZFS_ACL_DISCARD
) {
1669 while (pacep
= zfs_acl_next_ace(paclp
, pacep
, &who
,
1670 &access_mask
, &iflags
, &type
)) {
1672 if (zfsvfs
->z_acl_inherit
== ZFS_ACL_NOALLOW
&&
1676 ace_size
= aclp
->z_ops
.ace_size(pacep
);
1678 if (!zfs_ace_can_use(zp
, iflags
))
1682 * If owner@, group@, or everyone@ inheritable
1683 * then zfs_acl_chmod() isn't needed.
1685 if (zfsvfs
->z_acl_inherit
==
1686 ZFS_ACL_PASSTHROUGH
&&
1687 ((iflags
& (ACE_OWNER
|ACE_EVERYONE
)) ||
1688 ((iflags
& OWNING_GROUP
) ==
1689 OWNING_GROUP
)) && (vntype
== VREG
||
1691 (iflags
& ACE_DIRECTORY_INHERIT_ACE
))))
1692 *need_chmod
= B_FALSE
;
1694 aclnode
= zfs_acl_node_alloc(ace_size
);
1695 list_insert_tail(&aclp
->z_acl
, aclnode
);
1696 acep
= aclnode
->z_acldata
;
1697 zfs_set_ace(aclp
, acep
, access_mask
, type
,
1698 who
, iflags
|ACE_INHERITED_ACE
);
1701 * Copy special opaque data if any
1703 if ((data1sz
= paclp
->z_ops
.ace_data(pacep
,
1705 VERIFY((data2sz
= aclp
->z_ops
.ace_data(acep
,
1706 &data2
)) == data1sz
);
1707 bcopy(data1
, data2
, data2sz
);
1709 aclp
->z_acl_count
++;
1710 aclnode
->z_ace_count
++;
1711 aclp
->z_acl_bytes
+= aclnode
->z_size
;
1712 newflags
= aclp
->z_ops
.ace_flags_get(acep
);
1715 aclp
->z_hints
|= ZFS_INHERIT_ACE
;
1717 if ((iflags
& ACE_NO_PROPAGATE_INHERIT_ACE
) ||
1719 newflags
&= ~ALL_INHERIT
;
1720 aclp
->z_ops
.ace_flags_set(acep
,
1721 newflags
|ACE_INHERITED_ACE
);
1722 zfs_restricted_update(zfsvfs
, aclp
, acep
);
1726 ASSERT(vntype
== VDIR
);
1728 newflags
= aclp
->z_ops
.ace_flags_get(acep
);
1729 if ((iflags
& (ACE_FILE_INHERIT_ACE
|
1730 ACE_DIRECTORY_INHERIT_ACE
)) !=
1731 ACE_FILE_INHERIT_ACE
) {
1732 aclnode2
= zfs_acl_node_alloc(ace_size
);
1733 list_insert_tail(&aclp
->z_acl
, aclnode2
);
1734 acep2
= aclnode2
->z_acldata
;
1735 zfs_set_ace(aclp
, acep2
,
1736 access_mask
, type
, who
,
1737 iflags
|ACE_INHERITED_ACE
);
1738 newflags
|= ACE_INHERIT_ONLY_ACE
;
1739 aclp
->z_ops
.ace_flags_set(acep
, newflags
);
1740 newflags
&= ~ALL_INHERIT
;
1741 aclp
->z_ops
.ace_flags_set(acep2
,
1742 newflags
|ACE_INHERITED_ACE
);
1745 * Copy special opaque data if any
1747 if ((data1sz
= aclp
->z_ops
.ace_data(acep
,
1750 aclp
->z_ops
.ace_data(acep2
,
1751 &data2
)) == data1sz
);
1752 bcopy(data1
, data2
, data1sz
);
1754 aclp
->z_acl_count
++;
1755 aclnode2
->z_ace_count
++;
1756 aclp
->z_acl_bytes
+= aclnode
->z_size
;
1757 zfs_restricted_update(zfsvfs
, aclp
, acep2
);
1759 newflags
|= ACE_INHERIT_ONLY_ACE
;
1760 aclp
->z_ops
.ace_flags_set(acep
,
1761 newflags
|ACE_INHERITED_ACE
);
1769 * Create file system object initial permissions
1770 * including inheritable ACEs.
1773 zfs_perm_init(znode_t
*zp
, znode_t
*parent
, int flag
,
1774 vattr_t
*vap
, dmu_tx_t
*tx
, cred_t
*cr
,
1775 zfs_acl_t
*setaclp
, zfs_fuid_info_t
**fuidp
)
1777 uint64_t mode
, fuid
, fgid
;
1779 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1780 zfs_acl_t
*aclp
= NULL
;
1782 xvattr_t
*xvap
= (xvattr_t
*)vap
;
1784 boolean_t need_chmod
= B_TRUE
;
1789 mode
= MAKEIMODE(vap
->va_type
, vap
->va_mode
);
1792 * Determine uid and gid.
1794 if ((flag
& (IS_ROOT_NODE
| IS_REPLAY
)) ||
1795 ((flag
& IS_XATTR
) && (vap
->va_type
== VDIR
))) {
1796 fuid
= zfs_fuid_create(zfsvfs
, vap
->va_uid
, cr
,
1797 ZFS_OWNER
, tx
, fuidp
);
1798 fgid
= zfs_fuid_create(zfsvfs
, vap
->va_gid
, cr
,
1799 ZFS_GROUP
, tx
, fuidp
);
1802 fuid
= zfs_fuid_create_cred(zfsvfs
, ZFS_OWNER
, tx
, cr
, fuidp
);
1804 if (vap
->va_mask
& AT_GID
) {
1805 fgid
= zfs_fuid_create(zfsvfs
, vap
->va_gid
, cr
,
1806 ZFS_GROUP
, tx
, fuidp
);
1808 if (fgid
!= parent
->z_phys
->zp_gid
&&
1809 !groupmember(vap
->va_gid
, cr
) &&
1810 secpolicy_vnode_create_gid(cr
) != 0)
1814 if (parent
->z_phys
->zp_mode
& S_ISGID
) {
1815 fgid
= parent
->z_phys
->zp_gid
;
1816 gid
= zfs_fuid_map_id(zfsvfs
, fgid
,
1819 fgid
= zfs_fuid_create_cred(zfsvfs
,
1820 ZFS_GROUP
, tx
, cr
, fuidp
);
1827 * If we're creating a directory, and the parent directory has the
1828 * set-GID bit set, set in on the new directory.
1829 * Otherwise, if the user is neither privileged nor a member of the
1830 * file's new group, clear the file's set-GID bit.
1833 if ((parent
->z_phys
->zp_mode
& S_ISGID
) && (vap
->va_type
== VDIR
)) {
1836 if ((mode
& S_ISGID
) &&
1837 secpolicy_vnode_setids_setgids(cr
, gid
) != 0)
1841 zp
->z_phys
->zp_uid
= fuid
;
1842 zp
->z_phys
->zp_gid
= fgid
;
1843 zp
->z_phys
->zp_mode
= mode
;
1846 mutex_enter(&parent
->z_lock
);
1847 if (parent
->z_phys
->zp_flags
& ZFS_INHERIT_ACE
) {
1848 mutex_enter(&parent
->z_acl_lock
);
1849 VERIFY(0 == zfs_acl_node_read(parent
, &paclp
, B_FALSE
));
1850 mutex_exit(&parent
->z_acl_lock
);
1851 aclp
= zfs_acl_inherit(zp
, paclp
, &need_chmod
);
1852 zfs_acl_free(paclp
);
1854 aclp
= zfs_acl_alloc(zfs_acl_version_zp(zp
));
1856 mutex_exit(&parent
->z_lock
);
1857 mutex_enter(&zp
->z_lock
);
1858 mutex_enter(&zp
->z_acl_lock
);
1860 zfs_acl_chmod(zp
, mode
, aclp
);
1862 mutex_enter(&zp
->z_lock
);
1863 mutex_enter(&zp
->z_acl_lock
);
1866 /* Force auto_inherit on all new directory objects */
1867 if (vap
->va_type
== VDIR
)
1868 aclp
->z_hints
|= ZFS_ACL_AUTO_INHERIT
;
1870 error
= zfs_aclset_common(zp
, aclp
, cr
, fuidp
, tx
);
1872 /* Set optional attributes if any */
1873 if (vap
->va_mask
& AT_XVATTR
)
1874 zfs_xvattr_set(zp
, xvap
);
1876 mutex_exit(&zp
->z_lock
);
1877 mutex_exit(&zp
->z_acl_lock
);
1878 ASSERT3U(error
, ==, 0);
1880 if (aclp
!= setaclp
)
1885 * Retrieve a files ACL
1888 zfs_getacl(znode_t
*zp
, vsecattr_t
*vsecp
, boolean_t skipaclchk
, cred_t
*cr
)
1896 mask
= vsecp
->vsa_mask
& (VSA_ACE
| VSA_ACECNT
|
1897 VSA_ACE_ACLFLAGS
| VSA_ACE_ALLTYPES
);
1899 if (error
= zfs_zaccess(zp
, ACE_READ_ACL
, 0, skipaclchk
, cr
))
1905 mutex_enter(&zp
->z_acl_lock
);
1907 error
= zfs_acl_node_read(zp
, &aclp
, B_FALSE
);
1909 mutex_exit(&zp
->z_acl_lock
);
1914 * Scan ACL to determine number of ACEs
1916 if ((zp
->z_phys
->zp_flags
& ZFS_ACL_OBJ_ACE
) &&
1917 !(mask
& VSA_ACE_ALLTYPES
)) {
1920 uint32_t access_mask
;
1921 uint16_t type
, iflags
;
1923 while (zacep
= zfs_acl_next_ace(aclp
, zacep
,
1924 &who
, &access_mask
, &iflags
, &type
)) {
1926 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE
:
1927 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE
:
1928 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE
:
1929 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE
:
1936 vsecp
->vsa_aclcnt
= count
;
1938 count
= aclp
->z_acl_count
;
1940 if (mask
& VSA_ACECNT
) {
1941 vsecp
->vsa_aclcnt
= count
;
1944 if (mask
& VSA_ACE
) {
1947 zfs_acl_node_t
*aclnode
= list_head(&aclp
->z_acl
);
1949 aclsz
= count
* sizeof (ace_t
) +
1950 sizeof (ace_object_t
) * largeace
;
1952 vsecp
->vsa_aclentp
= kmem_alloc(aclsz
, KM_SLEEP
);
1953 vsecp
->vsa_aclentsz
= aclsz
;
1955 if (aclp
->z_version
== ZFS_ACL_VERSION_FUID
)
1956 zfs_copy_fuid_2_ace(zp
->z_zfsvfs
, aclp
, cr
,
1957 vsecp
->vsa_aclentp
, !(mask
& VSA_ACE_ALLTYPES
));
1959 bcopy(aclnode
->z_acldata
, vsecp
->vsa_aclentp
,
1960 count
* sizeof (ace_t
));
1963 if (mask
& VSA_ACE_ACLFLAGS
) {
1964 vsecp
->vsa_aclflags
= 0;
1965 if (zp
->z_phys
->zp_flags
& ZFS_ACL_DEFAULTED
)
1966 vsecp
->vsa_aclflags
|= ACL_DEFAULTED
;
1967 if (zp
->z_phys
->zp_flags
& ZFS_ACL_PROTECTED
)
1968 vsecp
->vsa_aclflags
|= ACL_PROTECTED
;
1969 if (zp
->z_phys
->zp_flags
& ZFS_ACL_AUTO_INHERIT
)
1970 vsecp
->vsa_aclflags
|= ACL_AUTO_INHERIT
;
1973 mutex_exit(&zp
->z_acl_lock
);
1981 zfs_vsec_2_aclp(zfsvfs_t
*zfsvfs
, vtype_t obj_type
,
1982 vsecattr_t
*vsecp
, zfs_acl_t
**zaclp
)
1985 zfs_acl_node_t
*aclnode
;
1986 int aclcnt
= vsecp
->vsa_aclcnt
;
1989 if (vsecp
->vsa_aclcnt
> MAX_ACL_ENTRIES
|| vsecp
->vsa_aclcnt
<= 0)
1992 aclp
= zfs_acl_alloc(zfs_acl_version(zfsvfs
->z_version
));
1995 aclnode
= zfs_acl_node_alloc(aclcnt
* sizeof (zfs_object_ace_t
));
1996 if (aclp
->z_version
== ZFS_ACL_VERSION_INITIAL
) {
1997 if ((error
= zfs_copy_ace_2_oldace(obj_type
, aclp
,
1998 (ace_t
*)vsecp
->vsa_aclentp
, aclnode
->z_acldata
,
1999 aclcnt
, &aclnode
->z_size
)) != 0) {
2001 zfs_acl_node_free(aclnode
);
2005 if ((error
= zfs_copy_ace_2_fuid(obj_type
, aclp
,
2006 vsecp
->vsa_aclentp
, aclnode
->z_acldata
, aclcnt
,
2007 &aclnode
->z_size
)) != 0) {
2009 zfs_acl_node_free(aclnode
);
2013 aclp
->z_acl_bytes
= aclnode
->z_size
;
2014 aclnode
->z_ace_count
= aclcnt
;
2015 aclp
->z_acl_count
= aclcnt
;
2016 list_insert_head(&aclp
->z_acl
, aclnode
);
2019 * If flags are being set then add them to z_hints
2021 if (vsecp
->vsa_mask
& VSA_ACE_ACLFLAGS
) {
2022 if (vsecp
->vsa_aclflags
& ACL_PROTECTED
)
2023 aclp
->z_hints
|= ZFS_ACL_PROTECTED
;
2024 if (vsecp
->vsa_aclflags
& ACL_DEFAULTED
)
2025 aclp
->z_hints
|= ZFS_ACL_DEFAULTED
;
2026 if (vsecp
->vsa_aclflags
& ACL_AUTO_INHERIT
)
2027 aclp
->z_hints
|= ZFS_ACL_AUTO_INHERIT
;
2039 zfs_setacl(znode_t
*zp
, vsecattr_t
*vsecp
, boolean_t skipaclchk
, cred_t
*cr
)
2041 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
2042 zilog_t
*zilog
= zfsvfs
->z_log
;
2043 ulong_t mask
= vsecp
->vsa_mask
& (VSA_ACE
| VSA_ACECNT
);
2047 zfs_fuid_info_t
*fuidp
= NULL
;
2052 if (zp
->z_phys
->zp_flags
& ZFS_IMMUTABLE
)
2055 if (error
= zfs_zaccess(zp
, ACE_WRITE_ACL
, 0, skipaclchk
, cr
))
2058 error
= zfs_vsec_2_aclp(zfsvfs
, ZTOV(zp
)->v_type
, vsecp
, &aclp
);
2063 * If ACL wide flags aren't being set then preserve any
2066 if (!(vsecp
->vsa_mask
& VSA_ACE_ACLFLAGS
)) {
2067 aclp
->z_hints
|= (zp
->z_phys
->zp_flags
& V4_ACL_WIDE_FLAGS
);
2070 if (error
= zfs_zaccess(zp
, ACE_WRITE_ACL
, 0, skipaclchk
, cr
)) {
2075 mutex_enter(&zp
->z_lock
);
2076 mutex_enter(&zp
->z_acl_lock
);
2078 tx
= dmu_tx_create(zfsvfs
->z_os
);
2079 dmu_tx_hold_bonus(tx
, zp
->z_id
);
2081 if (zp
->z_phys
->zp_acl
.z_acl_extern_obj
) {
2082 /* Are we upgrading ACL? */
2083 if (zfsvfs
->z_version
<= ZPL_VERSION_FUID
&&
2084 zp
->z_phys
->zp_acl
.z_acl_version
==
2085 ZFS_ACL_VERSION_INITIAL
) {
2086 dmu_tx_hold_free(tx
,
2087 zp
->z_phys
->zp_acl
.z_acl_extern_obj
,
2089 dmu_tx_hold_write(tx
, DMU_NEW_OBJECT
,
2090 0, aclp
->z_acl_bytes
);
2092 dmu_tx_hold_write(tx
,
2093 zp
->z_phys
->zp_acl
.z_acl_extern_obj
,
2094 0, aclp
->z_acl_bytes
);
2096 } else if (aclp
->z_acl_bytes
> ZFS_ACE_SPACE
) {
2097 dmu_tx_hold_write(tx
, DMU_NEW_OBJECT
, 0, aclp
->z_acl_bytes
);
2099 if (aclp
->z_has_fuids
) {
2100 if (zfsvfs
->z_fuid_obj
== 0) {
2101 dmu_tx_hold_bonus(tx
, DMU_NEW_OBJECT
);
2102 dmu_tx_hold_write(tx
, DMU_NEW_OBJECT
, 0,
2103 FUID_SIZE_ESTIMATE(zfsvfs
));
2104 dmu_tx_hold_zap(tx
, MASTER_NODE_OBJ
, FALSE
, NULL
);
2106 dmu_tx_hold_bonus(tx
, zfsvfs
->z_fuid_obj
);
2107 dmu_tx_hold_write(tx
, zfsvfs
->z_fuid_obj
, 0,
2108 FUID_SIZE_ESTIMATE(zfsvfs
));
2112 error
= dmu_tx_assign(tx
, zfsvfs
->z_assign
);
2114 mutex_exit(&zp
->z_acl_lock
);
2115 mutex_exit(&zp
->z_lock
);
2117 if (error
== ERESTART
&& zfsvfs
->z_assign
== TXG_NOWAIT
) {
2127 error
= zfs_aclset_common(zp
, aclp
, cr
, &fuidp
, tx
);
2130 zfs_log_acl(zilog
, tx
, zp
, vsecp
, fuidp
);
2133 zfs_fuid_info_free(fuidp
);
2137 mutex_exit(&zp
->z_acl_lock
);
2138 mutex_exit(&zp
->z_lock
);
2144 * working_mode returns the permissions that were not granted
2147 zfs_zaccess_common(znode_t
*zp
, uint32_t v4_mode
, uint32_t *working_mode
,
2148 boolean_t
*check_privs
, boolean_t skipaclchk
, cred_t
*cr
)
2151 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
2153 uid_t uid
= crgetuid(cr
);
2155 uint16_t type
, iflags
;
2156 uint16_t entry_type
;
2157 uint32_t access_mask
;
2158 uint32_t deny_mask
= 0;
2159 zfs_ace_hdr_t
*acep
= NULL
;
2165 * Short circuit empty requests
2170 *check_privs
= B_TRUE
;
2172 if (zfsvfs
->z_assign
>= TXG_INITIAL
) { /* ZIL replay */
2177 *working_mode
= v4_mode
;
2179 if ((v4_mode
& WRITE_MASK
) &&
2180 (zp
->z_zfsvfs
->z_vfs
->vfs_flag
& VFS_RDONLY
) &&
2181 (!IS_DEVVP(ZTOV(zp
)))) {
2182 *check_privs
= B_FALSE
;
2187 * Only check for READONLY on non-directories.
2189 if ((v4_mode
& WRITE_MASK_DATA
) &&
2190 (((ZTOV(zp
)->v_type
!= VDIR
) &&
2191 (zp
->z_phys
->zp_flags
& (ZFS_READONLY
| ZFS_IMMUTABLE
))) ||
2192 (ZTOV(zp
)->v_type
== VDIR
&&
2193 (zp
->z_phys
->zp_flags
& ZFS_IMMUTABLE
)))) {
2194 *check_privs
= B_FALSE
;
2198 if ((v4_mode
& (ACE_DELETE
| ACE_DELETE_CHILD
)) &&
2199 (zp
->z_phys
->zp_flags
& ZFS_NOUNLINK
)) {
2200 *check_privs
= B_FALSE
;
2204 if (((v4_mode
& (ACE_READ_DATA
|ACE_EXECUTE
)) &&
2205 (zp
->z_phys
->zp_flags
& ZFS_AV_QUARANTINED
))) {
2206 *check_privs
= B_FALSE
;
2211 * The caller requested that the ACL check be skipped. This
2212 * would only happen if the caller checked VOP_ACCESS() with a
2213 * 32 bit ACE mask and already had the appropriate permissions.
2220 zfs_fuid_map_ids(zp
, cr
, &fowner
, &gowner
);
2222 mutex_enter(&zp
->z_acl_lock
);
2224 error
= zfs_acl_node_read(zp
, &aclp
, B_FALSE
);
2226 mutex_exit(&zp
->z_acl_lock
);
2230 while (acep
= zfs_acl_next_ace(aclp
, acep
, &who
, &access_mask
,
2233 if (iflags
& ACE_INHERIT_ONLY_ACE
)
2236 entry_type
= (iflags
& ACE_TYPE_FLAGS
);
2240 switch (entry_type
) {
2248 case ACE_IDENTIFIER_GROUP
:
2249 checkit
= zfs_groupmember(zfsvfs
, who
, cr
);
2257 if (entry_type
== 0) {
2260 newid
= zfs_fuid_map_id(zfsvfs
, who
, cr
,
2262 if (newid
!= IDMAP_WK_CREATOR_OWNER_UID
&&
2268 mutex_exit(&zp
->z_acl_lock
);
2274 uint32_t mask_matched
= (access_mask
& *working_mode
);
2278 deny_mask
|= mask_matched
;
2280 *working_mode
&= ~mask_matched
;
2285 if (*working_mode
== 0)
2289 mutex_exit(&zp
->z_acl_lock
);
2292 /* Put the found 'denies' back on the working mode */
2293 *working_mode
|= deny_mask
;
2302 zfs_zaccess_append(znode_t
*zp
, uint32_t *working_mode
, boolean_t
*check_privs
,
2305 if (*working_mode
!= ACE_WRITE_DATA
)
2308 return (zfs_zaccess_common(zp
, ACE_APPEND_DATA
, working_mode
,
2309 check_privs
, B_FALSE
, cr
));
2313 * Determine whether Access should be granted/denied, invoking least
2314 * priv subsytem when a deny is determined.
2317 zfs_zaccess(znode_t
*zp
, int mode
, int flags
, boolean_t skipaclchk
, cred_t
*cr
)
2319 uint32_t working_mode
;
2322 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
2323 boolean_t check_privs
;
2325 znode_t
*check_zp
= zp
;
2327 is_attr
= ((zp
->z_phys
->zp_flags
& ZFS_XATTR
) &&
2328 (ZTOV(zp
)->v_type
== VDIR
));
2331 * If attribute then validate against base file
2334 if ((error
= zfs_zget(zp
->z_zfsvfs
,
2335 zp
->z_phys
->zp_parent
, &xzp
)) != 0) {
2342 * fixup mode to map to xattr perms
2345 if (mode
& (ACE_WRITE_DATA
|ACE_APPEND_DATA
)) {
2346 mode
&= ~(ACE_WRITE_DATA
|ACE_APPEND_DATA
);
2347 mode
|= ACE_WRITE_NAMED_ATTRS
;
2350 if (mode
& (ACE_READ_DATA
|ACE_EXECUTE
)) {
2351 mode
&= ~(ACE_READ_DATA
|ACE_EXECUTE
);
2352 mode
|= ACE_READ_NAMED_ATTRS
;
2356 if ((error
= zfs_zaccess_common(check_zp
, mode
, &working_mode
,
2357 &check_privs
, skipaclchk
, cr
)) == 0) {
2363 if (error
&& !check_privs
) {
2369 if (error
&& (flags
& V_APPEND
)) {
2370 error
= zfs_zaccess_append(zp
, &working_mode
, &check_privs
, cr
);
2373 if (error
&& check_privs
) {
2375 mode_t checkmode
= 0;
2377 owner
= zfs_fuid_map_id(zfsvfs
, check_zp
->z_phys
->zp_uid
, cr
,
2381 * First check for implicit owner permission on
2382 * read_acl/read_attributes
2386 ASSERT(working_mode
!= 0);
2388 if ((working_mode
& (ACE_READ_ACL
|ACE_READ_ATTRIBUTES
) &&
2389 owner
== crgetuid(cr
)))
2390 working_mode
&= ~(ACE_READ_ACL
|ACE_READ_ATTRIBUTES
);
2392 if (working_mode
& (ACE_READ_DATA
|ACE_READ_NAMED_ATTRS
|
2393 ACE_READ_ACL
|ACE_READ_ATTRIBUTES
))
2395 if (working_mode
& (ACE_WRITE_DATA
|ACE_WRITE_NAMED_ATTRS
|
2396 ACE_APPEND_DATA
|ACE_WRITE_ATTRIBUTES
))
2397 checkmode
|= VWRITE
;
2398 if (working_mode
& ACE_EXECUTE
)
2402 error
= secpolicy_vnode_access(cr
, ZTOV(check_zp
),
2405 if (error
== 0 && (working_mode
& ACE_WRITE_OWNER
))
2406 error
= secpolicy_vnode_create_gid(cr
);
2407 if (error
== 0 && (working_mode
& ACE_WRITE_ACL
))
2408 error
= secpolicy_vnode_setdac(cr
, owner
);
2410 if (error
== 0 && (working_mode
&
2411 (ACE_DELETE
|ACE_DELETE_CHILD
)))
2412 error
= secpolicy_vnode_remove(cr
);
2414 if (error
== 0 && (working_mode
& ACE_SYNCHRONIZE
))
2415 error
= secpolicy_vnode_owner(cr
, owner
);
2419 * See if any bits other than those already checked
2420 * for are still present. If so then return EACCES
2422 if (working_mode
& ~(ZFS_CHECKED_MASKS
)) {
2435 * Translate traditional unix VREAD/VWRITE/VEXEC mode into
2436 * native ACL format and call zfs_zaccess()
2439 zfs_zaccess_rwx(znode_t
*zp
, mode_t mode
, int flags
, cred_t
*cr
)
2441 return (zfs_zaccess(zp
, zfs_unix_to_v4(mode
>> 6), flags
, B_FALSE
, cr
));
2445 * Access function for secpolicy_vnode_setattr
2448 zfs_zaccess_unix(znode_t
*zp
, mode_t mode
, cred_t
*cr
)
2450 int v4_mode
= zfs_unix_to_v4(mode
>> 6);
2452 return (zfs_zaccess(zp
, v4_mode
, 0, B_FALSE
, cr
));
2456 zfs_delete_final_check(znode_t
*zp
, znode_t
*dzp
,
2457 mode_t missing_perms
, cred_t
*cr
)
2461 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
2463 downer
= zfs_fuid_map_id(zfsvfs
, dzp
->z_phys
->zp_uid
, cr
, ZFS_OWNER
);
2465 error
= secpolicy_vnode_access(cr
, ZTOV(dzp
), downer
, missing_perms
);
2468 error
= zfs_sticky_remove_access(dzp
, zp
, cr
);
2474 * Determine whether Access should be granted/deny, without
2475 * consulting least priv subsystem.
2478 * The following chart is the recommended NFSv4 enforcement for
2479 * ability to delete an object.
2481 * -------------------------------------------------------
2482 * | Parent Dir | Target Object Permissions |
2484 * -------------------------------------------------------
2485 * | | ACL Allows | ACL Denies| Delete |
2486 * | | Delete | Delete | unspecified|
2487 * -------------------------------------------------------
2488 * | ACL Allows | Permit | Permit | Permit |
2489 * | DELETE_CHILD | |
2490 * -------------------------------------------------------
2491 * | ACL Denies | Permit | Deny | Deny |
2492 * | DELETE_CHILD | | | |
2493 * -------------------------------------------------------
2494 * | ACL specifies | | | |
2495 * | only allow | Permit | Permit | Permit |
2496 * | write and | | | |
2498 * -------------------------------------------------------
2499 * | ACL denies | | | |
2500 * | write and | Permit | Deny | Deny |
2502 * -------------------------------------------------------
2505 * No search privilege, can't even look up file?
2509 zfs_zaccess_delete(znode_t
*dzp
, znode_t
*zp
, cred_t
*cr
)
2511 uint32_t dzp_working_mode
= 0;
2512 uint32_t zp_working_mode
= 0;
2513 int dzp_error
, zp_error
;
2514 mode_t missing_perms
;
2515 boolean_t dzpcheck_privs
= B_TRUE
;
2516 boolean_t zpcheck_privs
= B_TRUE
;
2519 * We want specific DELETE permissions to
2520 * take precedence over WRITE/EXECUTE. We don't
2521 * want an ACL such as this to mess us up.
2522 * user:joe:write_data:deny,user:joe:delete:allow
2524 * However, deny permissions may ultimately be overridden
2525 * by secpolicy_vnode_access().
2527 * We will ask for all of the necessary permissions and then
2528 * look at the working modes from the directory and target object
2529 * to determine what was found.
2532 if (zp
->z_phys
->zp_flags
& (ZFS_IMMUTABLE
| ZFS_NOUNLINK
))
2536 * If the directory permissions allow the delete, we are done.
2538 if ((dzp_error
= zfs_zaccess_common(dzp
,
2539 ACE_DELETE_CHILD
|ACE_EXECUTE
|ACE_WRITE_DATA
,
2540 &dzp_working_mode
, &dzpcheck_privs
, B_FALSE
, cr
)) == 0)
2544 * If target object has delete permission then we are done
2546 if ((zp_error
= zfs_zaccess_common(zp
, ACE_DELETE
, &zp_working_mode
,
2547 &zpcheck_privs
, B_FALSE
, cr
)) == 0)
2550 if (!dzpcheck_privs
)
2552 else if (!zpcheck_privs
)
2556 * First check the first row.
2557 * We only need to see if parent Allows delete_child
2559 if ((dzp_working_mode
& ACE_DELETE_CHILD
) == 0)
2564 * we already have the necessary information in
2565 * zp_working_mode, zp_error and dzp_error.
2568 if ((zp_working_mode
& ACE_DELETE
) == 0)
2572 * determine the needed permissions based off of the directories
2576 missing_perms
= (dzp_working_mode
& ACE_WRITE_DATA
) ? VWRITE
: 0;
2577 missing_perms
|= (dzp_working_mode
& ACE_EXECUTE
) ? VEXEC
: 0;
2579 if (dzp_error
== EACCES
)
2580 return (zfs_delete_final_check(zp
, dzp
, missing_perms
, cr
));
2584 * only need to see if we have write/execute on directory.
2587 if (missing_perms
== 0)
2588 return (zfs_sticky_remove_access(dzp
, zp
, cr
));
2594 if (missing_perms
&& ((zp_working_mode
& ACE_DELETE
) == 0))
2595 return (zfs_sticky_remove_access(dzp
, zp
, cr
));
2597 return (zfs_delete_final_check(zp
, dzp
, missing_perms
, cr
));
2601 zfs_zaccess_rename(znode_t
*sdzp
, znode_t
*szp
, znode_t
*tdzp
,
2602 znode_t
*tzp
, cred_t
*cr
)
2607 if (szp
->z_phys
->zp_flags
& ZFS_AV_QUARANTINED
)
2610 add_perm
= (ZTOV(szp
)->v_type
== VDIR
) ?
2611 ACE_ADD_SUBDIRECTORY
: ACE_ADD_FILE
;
2614 * Rename permissions are combination of delete permission +
2615 * add file/subdir permission.
2619 * first make sure we do the delete portion.
2621 * If that succeeds then check for add_file/add_subdir permissions
2624 if (error
= zfs_zaccess_delete(sdzp
, szp
, cr
))
2628 * If we have a tzp, see if we can delete it?
2631 if (error
= zfs_zaccess_delete(tdzp
, tzp
, cr
))
2636 * Now check for add permissions
2638 error
= zfs_zaccess(tdzp
, add_perm
, 0, B_FALSE
, cr
);