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|\
95 zfs_ace_v0_get_type(void *acep)
97 return (((zfs_oldace_t *)acep)->z_type);
101 zfs_ace_v0_get_flags(void *acep)
103 return (((zfs_oldace_t *)acep)->z_flags);
107 zfs_ace_v0_get_mask(void *acep)
109 return (((zfs_oldace_t *)acep)->z_access_mask);
113 zfs_ace_v0_get_who(void *acep)
115 return (((zfs_oldace_t *)acep)->z_fuid);
119 zfs_ace_v0_set_type(void *acep, uint16_t type)
121 ((zfs_oldace_t *)acep)->z_type = type;
125 zfs_ace_v0_set_flags(void *acep, uint16_t flags)
127 ((zfs_oldace_t *)acep)->z_flags = flags;
131 zfs_ace_v0_set_mask(void *acep, uint32_t mask)
133 ((zfs_oldace_t *)acep)->z_access_mask = mask;
137 zfs_ace_v0_set_who(void *acep, uint64_t who)
139 ((zfs_oldace_t *)acep)->z_fuid = who;
144 zfs_ace_v0_size(void *acep)
146 return (sizeof (zfs_oldace_t));
150 zfs_ace_v0_abstract_size(void)
152 return (sizeof (zfs_oldace_t));
156 zfs_ace_v0_mask_off(void)
158 return (offsetof(zfs_oldace_t, z_access_mask));
163 zfs_ace_v0_data(void *acep, void **datap)
169 static acl_ops_t zfs_acl_v0_ops = {
172 zfs_ace_v0_get_flags,
173 zfs_ace_v0_set_flags,
179 zfs_ace_v0_abstract_size,
185 zfs_ace_fuid_get_type(void *acep)
187 return (((zfs_ace_hdr_t *)acep)->z_type);
191 zfs_ace_fuid_get_flags(void *acep)
193 return (((zfs_ace_hdr_t *)acep)->z_flags);
197 zfs_ace_fuid_get_mask(void *acep)
199 return (((zfs_ace_hdr_t *)acep)->z_access_mask);
203 zfs_ace_fuid_get_who(void *args)
206 zfs_ace_t *acep = args;
208 entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
210 if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
211 entry_type == ACE_EVERYONE)
213 return (((zfs_ace_t *)acep)->z_fuid);
217 zfs_ace_fuid_set_type(void *acep, uint16_t type)
219 ((zfs_ace_hdr_t *)acep)->z_type = type;
223 zfs_ace_fuid_set_flags(void *acep, uint16_t flags)
225 ((zfs_ace_hdr_t *)acep)->z_flags = flags;
229 zfs_ace_fuid_set_mask(void *acep, uint32_t mask)
231 ((zfs_ace_hdr_t *)acep)->z_access_mask = mask;
235 zfs_ace_fuid_set_who(void *arg, uint64_t who)
237 zfs_ace_t *acep = arg;
239 uint16_t entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
241 if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
242 entry_type == ACE_EVERYONE)
248 zfs_ace_fuid_size(void *acep)
250 zfs_ace_hdr_t *zacep = acep;
253 switch (zacep->z_type) {
254 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
255 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
256 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
257 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
258 return (sizeof (zfs_object_ace_t));
262 (((zfs_ace_hdr_t *)acep)->z_flags & ACE_TYPE_FLAGS);
263 if (entry_type == ACE_OWNER ||
264 entry_type == OWNING_GROUP ||
265 entry_type == ACE_EVERYONE)
266 return (sizeof (zfs_ace_hdr_t));
269 return (sizeof (zfs_ace_t));
274 zfs_ace_fuid_abstract_size(void)
276 return (sizeof (zfs_ace_hdr_t));
280 zfs_ace_fuid_mask_off(void)
282 return (offsetof(zfs_ace_hdr_t, z_access_mask));
286 zfs_ace_fuid_data(void *acep, void **datap)
288 zfs_ace_t *zacep = acep;
289 zfs_object_ace_t *zobjp;
291 switch (zacep->z_hdr.z_type) {
292 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
293 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
294 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
295 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
297 *datap = (caddr_t)zobjp + sizeof (zfs_ace_t);
298 return (sizeof (zfs_object_ace_t) - sizeof (zfs_ace_t));
305 static acl_ops_t zfs_acl_fuid_ops = {
306 zfs_ace_fuid_get_mask,
307 zfs_ace_fuid_set_mask,
308 zfs_ace_fuid_get_flags,
309 zfs_ace_fuid_set_flags,
310 zfs_ace_fuid_get_type,
311 zfs_ace_fuid_set_type,
312 zfs_ace_fuid_get_who,
313 zfs_ace_fuid_set_who,
315 zfs_ace_fuid_abstract_size,
316 zfs_ace_fuid_mask_off,
321 zfs_acl_version(int version)
323 if (version < ZPL_VERSION_FUID)
324 return (ZFS_ACL_VERSION_INITIAL);
326 return (ZFS_ACL_VERSION_FUID);
330 zfs_acl_version_zp(znode_t *zp)
332 return (zfs_acl_version(zp->z_zfsvfs->z_version));
336 zfs_acl_alloc(int vers)
340 aclp = kmem_zalloc(sizeof (zfs_acl_t), KM_SLEEP);
341 list_create(&aclp->z_acl, sizeof (zfs_acl_node_t),
342 offsetof(zfs_acl_node_t, z_next));
343 aclp->z_version = vers;
344 if (vers == ZFS_ACL_VERSION_FUID)
345 aclp->z_ops = zfs_acl_fuid_ops;
347 aclp->z_ops = zfs_acl_v0_ops;
351 static zfs_acl_node_t *
352 zfs_acl_node_alloc(size_t bytes)
354 zfs_acl_node_t *aclnode;
356 aclnode = kmem_zalloc(sizeof (zfs_acl_node_t), KM_SLEEP);
358 aclnode->z_acldata = kmem_alloc(bytes, KM_SLEEP);
359 aclnode->z_allocdata = aclnode->z_acldata;
360 aclnode->z_allocsize = bytes;
361 aclnode->z_size = bytes;
368 zfs_acl_node_free(zfs_acl_node_t *aclnode)
370 if (aclnode->z_allocsize)
371 kmem_free(aclnode->z_allocdata, aclnode->z_allocsize);
372 kmem_free(aclnode, sizeof (zfs_acl_node_t));
376 zfs_acl_release_nodes(zfs_acl_t *aclp)
378 zfs_acl_node_t *aclnode;
380 while (aclnode = list_head(&aclp->z_acl)) {
381 list_remove(&aclp->z_acl, aclnode);
382 zfs_acl_node_free(aclnode);
384 aclp->z_acl_count = 0;
385 aclp->z_acl_bytes = 0;
389 zfs_acl_free(zfs_acl_t *aclp)
391 zfs_acl_release_nodes(aclp);
392 list_destroy(&aclp->z_acl);
393 kmem_free(aclp, sizeof (zfs_acl_t));
397 zfs_acl_valid_ace_type(uint_t type, uint_t flags)
404 case ACE_SYSTEM_AUDIT_ACE_TYPE:
405 case ACE_SYSTEM_ALARM_ACE_TYPE:
406 entry_type = flags & ACE_TYPE_FLAGS;
407 return (entry_type == ACE_OWNER ||
408 entry_type == OWNING_GROUP ||
409 entry_type == ACE_EVERYONE || entry_type == 0 ||
410 entry_type == ACE_IDENTIFIER_GROUP);
412 if (type >= MIN_ACE_TYPE && type <= MAX_ACE_TYPE)
419 zfs_ace_valid(vtype_t obj_type, zfs_acl_t *aclp, uint16_t type, uint16_t iflags)
422 * first check type of entry
425 if (!zfs_acl_valid_ace_type(type, iflags))
429 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
430 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
431 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
432 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
433 if (aclp->z_version < ZFS_ACL_VERSION_FUID)
435 aclp->z_hints |= ZFS_ACL_OBJ_ACE;
439 * next check inheritance level flags
442 if (obj_type == VDIR &&
443 (iflags & (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE)))
444 aclp->z_hints |= ZFS_INHERIT_ACE;
446 if (iflags & (ACE_INHERIT_ONLY_ACE|ACE_NO_PROPAGATE_INHERIT_ACE)) {
447 if ((iflags & (ACE_FILE_INHERIT_ACE|
448 ACE_DIRECTORY_INHERIT_ACE)) == 0) {
457 zfs_acl_next_ace(zfs_acl_t *aclp, void *start, uint64_t *who,
458 uint32_t *access_mask, uint16_t *iflags, uint16_t *type)
460 zfs_acl_node_t *aclnode;
463 aclnode = list_head(&aclp->z_acl);
467 aclp->z_next_ace = aclnode->z_acldata;
468 aclp->z_curr_node = aclnode;
469 aclnode->z_ace_idx = 0;
472 aclnode = aclp->z_curr_node;
477 if (aclnode->z_ace_idx >= aclnode->z_ace_count) {
478 aclnode = list_next(&aclp->z_acl, aclnode);
482 aclp->z_curr_node = aclnode;
483 aclnode->z_ace_idx = 0;
484 aclp->z_next_ace = aclnode->z_acldata;
488 if (aclnode->z_ace_idx < aclnode->z_ace_count) {
489 void *acep = aclp->z_next_ace;
493 * Make sure we don't overstep our bounds
495 ace_size = aclp->z_ops.ace_size(acep);
497 if (((caddr_t)acep + ace_size) >
498 ((caddr_t)aclnode->z_acldata + aclnode->z_size)) {
502 *iflags = aclp->z_ops.ace_flags_get(acep);
503 *type = aclp->z_ops.ace_type_get(acep);
504 *access_mask = aclp->z_ops.ace_mask_get(acep);
505 *who = aclp->z_ops.ace_who_get(acep);
506 aclp->z_next_ace = (caddr_t)aclp->z_next_ace + ace_size;
507 aclnode->z_ace_idx++;
508 return ((void *)acep);
515 zfs_ace_walk(void *datap, uint64_t cookie, int aclcnt,
516 uint16_t *flags, uint16_t *type, uint32_t *mask)
518 zfs_acl_t *aclp = datap;
519 zfs_ace_hdr_t *acep = (zfs_ace_hdr_t *)(uintptr_t)cookie;
522 acep = zfs_acl_next_ace(aclp, acep, &who, mask,
524 return ((uint64_t)(uintptr_t)acep);
527 static zfs_acl_node_t *
528 zfs_acl_curr_node(zfs_acl_t *aclp)
530 ASSERT(aclp->z_curr_node);
531 return (aclp->z_curr_node);
535 * Copy ACE to internal ZFS format.
536 * While processing the ACL each ACE will be validated for correctness.
537 * ACE FUIDs will be created later.
540 zfs_copy_ace_2_fuid(zfsvfs_t *zfsvfs, vtype_t obj_type, zfs_acl_t *aclp,
541 void *datap, zfs_ace_t *z_acl, int aclcnt, size_t *size,
542 zfs_fuid_info_t **fuidp, cred_t *cr)
546 zfs_ace_t *aceptr = z_acl;
548 zfs_object_ace_t *zobjacep;
549 ace_object_t *aceobjp;
551 for (i = 0; i != aclcnt; i++) {
552 aceptr->z_hdr.z_access_mask = acep->a_access_mask;
553 aceptr->z_hdr.z_flags = acep->a_flags;
554 aceptr->z_hdr.z_type = acep->a_type;
555 entry_type = aceptr->z_hdr.z_flags & ACE_TYPE_FLAGS;
556 if (entry_type != ACE_OWNER && entry_type != OWNING_GROUP &&
557 entry_type != ACE_EVERYONE) {
558 aceptr->z_fuid = zfs_fuid_create(zfsvfs, acep->a_who,
559 cr, (entry_type == 0) ?
560 ZFS_ACE_USER : ZFS_ACE_GROUP, fuidp);
564 * Make sure ACE is valid
566 if (zfs_ace_valid(obj_type, aclp, aceptr->z_hdr.z_type,
567 aceptr->z_hdr.z_flags) != B_TRUE)
570 switch (acep->a_type) {
571 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
572 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
573 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
574 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
575 zobjacep = (zfs_object_ace_t *)aceptr;
576 aceobjp = (ace_object_t *)acep;
578 bcopy(aceobjp->a_obj_type, zobjacep->z_object_type,
579 sizeof (aceobjp->a_obj_type));
580 bcopy(aceobjp->a_inherit_obj_type,
581 zobjacep->z_inherit_type,
582 sizeof (aceobjp->a_inherit_obj_type));
583 acep = (ace_t *)((caddr_t)acep + sizeof (ace_object_t));
586 acep = (ace_t *)((caddr_t)acep + sizeof (ace_t));
589 aceptr = (zfs_ace_t *)((caddr_t)aceptr +
590 aclp->z_ops.ace_size(aceptr));
593 *size = (caddr_t)aceptr - (caddr_t)z_acl;
599 * Copy ZFS ACEs to fixed size ace_t layout
602 zfs_copy_fuid_2_ace(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, cred_t *cr,
603 void *datap, int filter)
606 uint32_t access_mask;
607 uint16_t iflags, type;
608 zfs_ace_hdr_t *zacep = NULL;
610 ace_object_t *objacep;
611 zfs_object_ace_t *zobjacep;
615 while (zacep = zfs_acl_next_ace(aclp, zacep,
616 &who, &access_mask, &iflags, &type)) {
619 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
620 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
621 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
622 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
626 zobjacep = (zfs_object_ace_t *)zacep;
627 objacep = (ace_object_t *)acep;
628 bcopy(zobjacep->z_object_type,
630 sizeof (zobjacep->z_object_type));
631 bcopy(zobjacep->z_inherit_type,
632 objacep->a_inherit_obj_type,
633 sizeof (zobjacep->z_inherit_type));
634 ace_size = sizeof (ace_object_t);
637 ace_size = sizeof (ace_t);
641 entry_type = (iflags & ACE_TYPE_FLAGS);
642 if ((entry_type != ACE_OWNER &&
643 entry_type != OWNING_GROUP &&
644 entry_type != ACE_EVERYONE)) {
645 acep->a_who = zfs_fuid_map_id(zfsvfs, who,
646 cr, (entry_type & ACE_IDENTIFIER_GROUP) ?
647 ZFS_ACE_GROUP : ZFS_ACE_USER);
649 acep->a_who = (uid_t)(int64_t)who;
651 acep->a_access_mask = access_mask;
652 acep->a_flags = iflags;
654 acep = (ace_t *)((caddr_t)acep + ace_size);
659 zfs_copy_ace_2_oldace(vtype_t obj_type, zfs_acl_t *aclp, ace_t *acep,
660 zfs_oldace_t *z_acl, int aclcnt, size_t *size)
663 zfs_oldace_t *aceptr = z_acl;
665 for (i = 0; i != aclcnt; i++, aceptr++) {
666 aceptr->z_access_mask = acep[i].a_access_mask;
667 aceptr->z_type = acep[i].a_type;
668 aceptr->z_flags = acep[i].a_flags;
669 aceptr->z_fuid = acep[i].a_who;
671 * Make sure ACE is valid
673 if (zfs_ace_valid(obj_type, aclp, aceptr->z_type,
674 aceptr->z_flags) != B_TRUE)
677 *size = (caddr_t)aceptr - (caddr_t)z_acl;
682 * convert old ACL format to new
685 zfs_acl_xform(znode_t *zp, zfs_acl_t *aclp, cred_t *cr)
687 zfs_oldace_t *oldaclp;
689 uint16_t type, iflags;
690 uint32_t access_mask;
693 zfs_acl_node_t *newaclnode;
695 ASSERT(aclp->z_version == ZFS_ACL_VERSION_INITIAL);
697 * First create the ACE in a contiguous piece of memory
698 * for zfs_copy_ace_2_fuid().
700 * We only convert an ACL once, so this won't happen
703 oldaclp = kmem_alloc(sizeof (zfs_oldace_t) * aclp->z_acl_count,
706 while (cookie = zfs_acl_next_ace(aclp, cookie, &who,
707 &access_mask, &iflags, &type)) {
708 oldaclp[i].z_flags = iflags;
709 oldaclp[i].z_type = type;
710 oldaclp[i].z_fuid = who;
711 oldaclp[i++].z_access_mask = access_mask;
714 newaclnode = zfs_acl_node_alloc(aclp->z_acl_count *
715 sizeof (zfs_object_ace_t));
716 aclp->z_ops = zfs_acl_fuid_ops;
717 VERIFY(zfs_copy_ace_2_fuid(zp->z_zfsvfs, ZTOV(zp)->v_type, aclp,
718 oldaclp, newaclnode->z_acldata, aclp->z_acl_count,
719 &newaclnode->z_size, NULL, cr) == 0);
720 newaclnode->z_ace_count = aclp->z_acl_count;
721 aclp->z_version = ZFS_ACL_VERSION;
722 kmem_free(oldaclp, aclp->z_acl_count * sizeof (zfs_oldace_t));
725 * Release all previous ACL nodes
728 zfs_acl_release_nodes(aclp);
730 list_insert_head(&aclp->z_acl, newaclnode);
732 aclp->z_acl_bytes = newaclnode->z_size;
733 aclp->z_acl_count = newaclnode->z_ace_count;
738 * Convert unix access mask to v4 access mask
741 zfs_unix_to_v4(uint32_t access_mask)
743 uint32_t new_mask = 0;
745 if (access_mask & S_IXOTH)
746 new_mask |= ACE_EXECUTE;
747 if (access_mask & S_IWOTH)
748 new_mask |= ACE_WRITE_DATA;
749 if (access_mask & S_IROTH)
750 new_mask |= ACE_READ_DATA;
755 zfs_set_ace(zfs_acl_t *aclp, void *acep, uint32_t access_mask,
756 uint16_t access_type, uint64_t fuid, uint16_t entry_type)
758 uint16_t type = entry_type & ACE_TYPE_FLAGS;
760 aclp->z_ops.ace_mask_set(acep, access_mask);
761 aclp->z_ops.ace_type_set(acep, access_type);
762 aclp->z_ops.ace_flags_set(acep, entry_type);
763 if ((type != ACE_OWNER && type != OWNING_GROUP &&
764 type != ACE_EVERYONE))
765 aclp->z_ops.ace_who_set(acep, fuid);
769 * Determine mode of file based on ACL.
770 * Also, create FUIDs for any User/Group ACEs
773 zfs_mode_compute(znode_t *zp, zfs_acl_t *aclp)
778 zfs_ace_hdr_t *acep = NULL;
780 uint16_t iflags, type;
781 uint32_t access_mask;
783 mode = (zp->z_phys->zp_mode & (S_IFMT | S_ISUID | S_ISGID | S_ISVTX));
785 while (acep = zfs_acl_next_ace(aclp, acep, &who,
786 &access_mask, &iflags, &type)) {
788 if (!zfs_acl_valid_ace_type(type, iflags))
791 entry_type = (iflags & ACE_TYPE_FLAGS);
794 * Skip over owner@, group@ or everyone@ inherit only ACEs
796 if ((iflags & ACE_INHERIT_ONLY_ACE) &&
797 (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
798 entry_type == OWNING_GROUP))
801 if (entry_type == ACE_OWNER) {
802 if ((access_mask & ACE_READ_DATA) &&
803 (!(seen & S_IRUSR))) {
809 if ((access_mask & ACE_WRITE_DATA) &&
810 (!(seen & S_IWUSR))) {
816 if ((access_mask & ACE_EXECUTE) &&
817 (!(seen & S_IXUSR))) {
823 } else if (entry_type == OWNING_GROUP) {
824 if ((access_mask & ACE_READ_DATA) &&
825 (!(seen & S_IRGRP))) {
831 if ((access_mask & ACE_WRITE_DATA) &&
832 (!(seen & S_IWGRP))) {
838 if ((access_mask & ACE_EXECUTE) &&
839 (!(seen & S_IXGRP))) {
845 } else if (entry_type == ACE_EVERYONE) {
846 if ((access_mask & ACE_READ_DATA)) {
847 if (!(seen & S_IRUSR)) {
853 if (!(seen & S_IRGRP)) {
859 if (!(seen & S_IROTH)) {
866 if ((access_mask & ACE_WRITE_DATA)) {
867 if (!(seen & S_IWUSR)) {
873 if (!(seen & S_IWGRP)) {
879 if (!(seen & S_IWOTH)) {
886 if ((access_mask & ACE_EXECUTE)) {
887 if (!(seen & S_IXUSR)) {
893 if (!(seen & S_IXGRP)) {
899 if (!(seen & S_IXOTH)) {
912 zfs_acl_node_read_internal(znode_t *zp, boolean_t will_modify)
915 zfs_acl_node_t *aclnode;
917 aclp = zfs_acl_alloc(zp->z_phys->zp_acl.z_acl_version);
920 * Version 0 to 1 znode_acl_phys has the size/count fields swapped.
921 * Version 0 didn't have a size field, only a count.
923 if (zp->z_phys->zp_acl.z_acl_version == ZFS_ACL_VERSION_INITIAL) {
924 aclp->z_acl_count = zp->z_phys->zp_acl.z_acl_size;
925 aclp->z_acl_bytes = ZFS_ACL_SIZE(aclp->z_acl_count);
927 aclp->z_acl_count = zp->z_phys->zp_acl.z_acl_count;
928 aclp->z_acl_bytes = zp->z_phys->zp_acl.z_acl_size;
931 aclnode = zfs_acl_node_alloc(will_modify ? aclp->z_acl_bytes : 0);
932 aclnode->z_ace_count = aclp->z_acl_count;
934 bcopy(zp->z_phys->zp_acl.z_ace_data, aclnode->z_acldata,
937 aclnode->z_size = aclp->z_acl_bytes;
938 aclnode->z_acldata = &zp->z_phys->zp_acl.z_ace_data[0];
941 list_insert_head(&aclp->z_acl, aclnode);
947 * Read an external acl object.
950 zfs_acl_node_read(znode_t *zp, zfs_acl_t **aclpp, boolean_t will_modify)
952 uint64_t extacl = zp->z_phys->zp_acl.z_acl_extern_obj;
956 zfs_acl_node_t *aclnode;
959 ASSERT(MUTEX_HELD(&zp->z_acl_lock));
961 if (zp->z_phys->zp_acl.z_acl_extern_obj == 0) {
962 *aclpp = zfs_acl_node_read_internal(zp, will_modify);
966 aclp = zfs_acl_alloc(zp->z_phys->zp_acl.z_acl_version);
967 if (zp->z_phys->zp_acl.z_acl_version == ZFS_ACL_VERSION_INITIAL) {
968 zfs_acl_phys_v0_t *zacl0 =
969 (zfs_acl_phys_v0_t *)&zp->z_phys->zp_acl;
971 aclsize = ZFS_ACL_SIZE(zacl0->z_acl_count);
972 acl_count = zacl0->z_acl_count;
974 aclsize = zp->z_phys->zp_acl.z_acl_size;
975 acl_count = zp->z_phys->zp_acl.z_acl_count;
977 aclsize = acl_count * sizeof (zfs_ace_t);
979 aclnode = zfs_acl_node_alloc(aclsize);
980 list_insert_head(&aclp->z_acl, aclnode);
981 error = dmu_read(zp->z_zfsvfs->z_os, extacl, 0,
982 aclsize, aclnode->z_acldata, DMU_READ_PREFETCH);
983 aclnode->z_ace_count = acl_count;
984 aclp->z_acl_count = acl_count;
985 aclp->z_acl_bytes = aclsize;
989 /* convert checksum errors into IO errors */
1000 * common code for setting ACLs.
1002 * This function is called from zfs_mode_update, zfs_perm_init, and zfs_setacl.
1003 * zfs_setacl passes a non-NULL inherit pointer (ihp) to indicate that it's
1004 * already checked the acl and knows whether to inherit.
1007 zfs_aclset_common(znode_t *zp, zfs_acl_t *aclp, cred_t *cr, dmu_tx_t *tx)
1010 znode_phys_t *zphys = zp->z_phys;
1011 zfs_acl_phys_t *zacl = &zphys->zp_acl;
1012 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1013 uint64_t aoid = zphys->zp_acl.z_acl_extern_obj;
1015 dmu_object_type_t otype;
1016 zfs_acl_node_t *aclnode;
1018 dmu_buf_will_dirty(zp->z_dbuf, tx);
1020 zphys->zp_mode = zfs_mode_compute(zp, aclp);
1023 * Decide which opbject type to use. If we are forced to
1024 * use old ACL format than transform ACL into zfs_oldace_t
1027 if (!zfsvfs->z_use_fuids) {
1028 otype = DMU_OT_OLDACL;
1030 if ((aclp->z_version == ZFS_ACL_VERSION_INITIAL) &&
1031 (zfsvfs->z_version >= ZPL_VERSION_FUID))
1032 zfs_acl_xform(zp, aclp, cr);
1033 ASSERT(aclp->z_version >= ZFS_ACL_VERSION_FUID);
1037 if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
1039 * If ACL was previously external and we are now
1040 * converting to new ACL format then release old
1041 * ACL object and create a new one.
1043 if (aoid && aclp->z_version != zacl->z_acl_version) {
1044 error = dmu_object_free(zfsvfs->z_os,
1045 zp->z_phys->zp_acl.z_acl_extern_obj, tx);
1051 aoid = dmu_object_alloc(zfsvfs->z_os,
1052 otype, aclp->z_acl_bytes,
1053 otype == DMU_OT_ACL ? DMU_OT_SYSACL : DMU_OT_NONE,
1054 otype == DMU_OT_ACL ? DN_MAX_BONUSLEN : 0, tx);
1056 (void) dmu_object_set_blocksize(zfsvfs->z_os, aoid,
1057 aclp->z_acl_bytes, 0, tx);
1059 zphys->zp_acl.z_acl_extern_obj = aoid;
1060 for (aclnode = list_head(&aclp->z_acl); aclnode;
1061 aclnode = list_next(&aclp->z_acl, aclnode)) {
1062 if (aclnode->z_ace_count == 0)
1064 dmu_write(zfsvfs->z_os, aoid, off,
1065 aclnode->z_size, aclnode->z_acldata, tx);
1066 off += aclnode->z_size;
1069 void *start = zacl->z_ace_data;
1071 * Migrating back embedded?
1073 if (zphys->zp_acl.z_acl_extern_obj) {
1074 error = dmu_object_free(zfsvfs->z_os,
1075 zp->z_phys->zp_acl.z_acl_extern_obj, tx);
1078 zphys->zp_acl.z_acl_extern_obj = 0;
1081 for (aclnode = list_head(&aclp->z_acl); aclnode;
1082 aclnode = list_next(&aclp->z_acl, aclnode)) {
1083 if (aclnode->z_ace_count == 0)
1085 bcopy(aclnode->z_acldata, start, aclnode->z_size);
1086 start = (caddr_t)start + aclnode->z_size;
1091 * If Old version then swap count/bytes to match old
1092 * layout of znode_acl_phys_t.
1094 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
1095 zphys->zp_acl.z_acl_size = aclp->z_acl_count;
1096 zphys->zp_acl.z_acl_count = aclp->z_acl_bytes;
1098 zphys->zp_acl.z_acl_size = aclp->z_acl_bytes;
1099 zphys->zp_acl.z_acl_count = aclp->z_acl_count;
1102 zphys->zp_acl.z_acl_version = aclp->z_version;
1105 * Replace ACL wide bits, but first clear them.
1107 zp->z_phys->zp_flags &= ~ZFS_ACL_WIDE_FLAGS;
1109 zp->z_phys->zp_flags |= aclp->z_hints;
1111 if (ace_trivial_common(aclp, 0, zfs_ace_walk) == 0)
1112 zp->z_phys->zp_flags |= ZFS_ACL_TRIVIAL;
1118 * Update access mask for prepended ACE
1120 * This applies the "groupmask" value for aclmode property.
1123 zfs_acl_prepend_fixup(zfs_acl_t *aclp, void *acep, void *origacep,
1124 mode_t mode, uint64_t owner)
1126 int rmask, wmask, xmask;
1129 uint32_t origmask, acepmask;
1132 aceflags = aclp->z_ops.ace_flags_get(acep);
1133 fuid = aclp->z_ops.ace_who_get(acep);
1134 origmask = aclp->z_ops.ace_mask_get(origacep);
1135 acepmask = aclp->z_ops.ace_mask_get(acep);
1137 user_ace = (!(aceflags &
1138 (ACE_OWNER|ACE_GROUP|ACE_IDENTIFIER_GROUP)));
1140 if (user_ace && (fuid == owner)) {
1150 if (origmask & ACE_READ_DATA) {
1152 acepmask &= ~ACE_READ_DATA;
1154 acepmask |= ACE_READ_DATA;
1158 if (origmask & ACE_WRITE_DATA) {
1160 acepmask &= ~ACE_WRITE_DATA;
1162 acepmask |= ACE_WRITE_DATA;
1166 if (origmask & ACE_APPEND_DATA) {
1168 acepmask &= ~ACE_APPEND_DATA;
1170 acepmask |= ACE_APPEND_DATA;
1174 if (origmask & ACE_EXECUTE) {
1176 acepmask &= ~ACE_EXECUTE;
1178 acepmask |= ACE_EXECUTE;
1181 aclp->z_ops.ace_mask_set(acep, acepmask);
1185 * Apply mode to canonical six ACEs.
1188 zfs_acl_fixup_canonical_six(zfs_acl_t *aclp, mode_t mode)
1190 zfs_acl_node_t *aclnode = list_tail(&aclp->z_acl);
1192 int maskoff = aclp->z_ops.ace_mask_off();
1193 size_t abstract_size = aclp->z_ops.ace_abstract_size();
1195 ASSERT(aclnode != NULL);
1197 acep = (void *)((caddr_t)aclnode->z_acldata +
1198 aclnode->z_size - (abstract_size * 6));
1201 * Fixup final ACEs to match the mode
1204 adjust_ace_pair_common(acep, maskoff, abstract_size,
1205 (mode & 0700) >> 6); /* owner@ */
1207 acep = (caddr_t)acep + (abstract_size * 2);
1209 adjust_ace_pair_common(acep, maskoff, abstract_size,
1210 (mode & 0070) >> 3); /* group@ */
1212 acep = (caddr_t)acep + (abstract_size * 2);
1213 adjust_ace_pair_common(acep, maskoff,
1214 abstract_size, mode); /* everyone@ */
1219 zfs_acl_ace_match(zfs_acl_t *aclp, void *acep, int allow_deny,
1220 int entry_type, int accessmask)
1222 uint32_t mask = aclp->z_ops.ace_mask_get(acep);
1223 uint16_t type = aclp->z_ops.ace_type_get(acep);
1224 uint16_t flags = aclp->z_ops.ace_flags_get(acep);
1226 return (mask == accessmask && type == allow_deny &&
1227 ((flags & ACE_TYPE_FLAGS) == entry_type));
1231 * Can prepended ACE be reused?
1234 zfs_reuse_deny(zfs_acl_t *aclp, void *acep, void *prevacep)
1240 uint32_t mask, prevmask;
1242 if (prevacep == NULL)
1245 prevtype = aclp->z_ops.ace_type_get(prevacep);
1246 prevflags = aclp->z_ops.ace_flags_get(prevacep);
1247 flags = aclp->z_ops.ace_flags_get(acep);
1248 mask = aclp->z_ops.ace_mask_get(acep);
1249 prevmask = aclp->z_ops.ace_mask_get(prevacep);
1251 if (prevtype != DENY)
1254 if (prevflags != (flags & ACE_IDENTIFIER_GROUP))
1257 okay_masks = (mask & OKAY_MASK_BITS);
1259 if (prevmask & ~okay_masks)
1267 * Insert new ACL node into chain of zfs_acl_node_t's
1269 * This will result in two possible results.
1270 * 1. If the ACL is currently just a single zfs_acl_node and
1271 * we are prepending the entry then current acl node will have
1272 * a new node inserted above it.
1274 * 2. If we are inserting in the middle of current acl node then
1275 * the current node will be split in two and new node will be inserted
1276 * in between the two split nodes.
1278 static zfs_acl_node_t *
1279 zfs_acl_ace_insert(zfs_acl_t *aclp, void *acep)
1281 zfs_acl_node_t *newnode;
1282 zfs_acl_node_t *trailernode = NULL;
1283 zfs_acl_node_t *currnode = zfs_acl_curr_node(aclp);
1284 int curr_idx = aclp->z_curr_node->z_ace_idx;
1288 newnode = zfs_acl_node_alloc(aclp->z_ops.ace_size(acep));
1289 newnode->z_ace_count = 1;
1291 oldsize = currnode->z_size;
1293 if (curr_idx != 1) {
1294 trailernode = zfs_acl_node_alloc(0);
1295 trailernode->z_acldata = acep;
1297 trailer_count = currnode->z_ace_count - curr_idx + 1;
1298 currnode->z_ace_count = curr_idx - 1;
1299 currnode->z_size = (caddr_t)acep - (caddr_t)currnode->z_acldata;
1300 trailernode->z_size = oldsize - currnode->z_size;
1301 trailernode->z_ace_count = trailer_count;
1304 aclp->z_acl_count += 1;
1305 aclp->z_acl_bytes += aclp->z_ops.ace_size(acep);
1308 list_insert_before(&aclp->z_acl, currnode, newnode);
1310 list_insert_after(&aclp->z_acl, currnode, newnode);
1312 list_insert_after(&aclp->z_acl, newnode, trailernode);
1313 aclp->z_curr_node = trailernode;
1314 trailernode->z_ace_idx = 1;
1324 zfs_acl_prepend_deny(uint64_t uid, zfs_acl_t *aclp, void *acep,
1327 zfs_acl_node_t *aclnode;
1332 aclnode = zfs_acl_ace_insert(aclp, acep);
1333 newacep = aclnode->z_acldata;
1334 fuid = aclp->z_ops.ace_who_get(acep);
1335 flags = aclp->z_ops.ace_flags_get(acep);
1336 zfs_set_ace(aclp, newacep, 0, DENY, fuid, (flags & ACE_TYPE_FLAGS));
1337 zfs_acl_prepend_fixup(aclp, newacep, acep, mode, uid);
1343 * Split an inherited ACE into inherit_only ACE
1344 * and original ACE with inheritance flags stripped off.
1347 zfs_acl_split_ace(zfs_acl_t *aclp, zfs_ace_hdr_t *acep)
1349 zfs_acl_node_t *aclnode;
1350 zfs_acl_node_t *currnode;
1352 uint16_t type, flags;
1356 type = aclp->z_ops.ace_type_get(acep);
1357 flags = aclp->z_ops.ace_flags_get(acep);
1358 mask = aclp->z_ops.ace_mask_get(acep);
1359 fuid = aclp->z_ops.ace_who_get(acep);
1361 aclnode = zfs_acl_ace_insert(aclp, acep);
1362 newacep = aclnode->z_acldata;
1364 aclp->z_ops.ace_type_set(newacep, type);
1365 aclp->z_ops.ace_flags_set(newacep, flags | ACE_INHERIT_ONLY_ACE);
1366 aclp->z_ops.ace_mask_set(newacep, mask);
1367 aclp->z_ops.ace_type_set(newacep, type);
1368 aclp->z_ops.ace_who_set(newacep, fuid);
1369 aclp->z_next_ace = acep;
1370 flags &= ~ALL_INHERIT;
1371 aclp->z_ops.ace_flags_set(acep, flags);
1372 currnode = zfs_acl_curr_node(aclp);
1373 ASSERT(currnode->z_ace_idx >= 1);
1374 currnode->z_ace_idx -= 1;
1378 * Are ACES started at index i, the canonical six ACES?
1381 zfs_have_canonical_six(zfs_acl_t *aclp)
1384 zfs_acl_node_t *aclnode = list_tail(&aclp->z_acl);
1386 size_t abstract_size = aclp->z_ops.ace_abstract_size();
1388 ASSERT(aclnode != NULL);
1390 if (aclnode->z_ace_count < 6)
1393 acep = (void *)((caddr_t)aclnode->z_acldata +
1394 aclnode->z_size - (aclp->z_ops.ace_abstract_size() * 6));
1396 if ((zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
1397 DENY, ACE_OWNER, 0) &&
1398 zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
1399 ALLOW, ACE_OWNER, OWNER_ALLOW_MASK) &&
1400 zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++), DENY,
1401 OWNING_GROUP, 0) && zfs_acl_ace_match(aclp, (caddr_t)acep +
1402 (abstract_size * i++),
1403 ALLOW, OWNING_GROUP, 0) &&
1404 zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
1405 DENY, ACE_EVERYONE, EVERYONE_DENY_MASK) &&
1406 zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++),
1407 ALLOW, ACE_EVERYONE, EVERYONE_ALLOW_MASK))) {
1416 * Apply step 1g, to group entries
1418 * Need to deal with corner case where group may have
1419 * greater permissions than owner. If so then limit
1420 * group permissions, based on what extra permissions
1424 zfs_fixup_group_entries(zfs_acl_t *aclp, void *acep, void *prevacep,
1427 uint32_t prevmask = aclp->z_ops.ace_mask_get(prevacep);
1428 uint32_t mask = aclp->z_ops.ace_mask_get(acep);
1429 uint16_t prevflags = aclp->z_ops.ace_flags_get(prevacep);
1430 mode_t extramode = (mode >> 3) & 07;
1431 mode_t ownermode = (mode >> 6);
1433 if (prevflags & ACE_IDENTIFIER_GROUP) {
1435 extramode &= ~ownermode;
1438 if (extramode & S_IROTH) {
1439 prevmask &= ~ACE_READ_DATA;
1440 mask &= ~ACE_READ_DATA;
1442 if (extramode & S_IWOTH) {
1443 prevmask &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
1444 mask &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
1446 if (extramode & S_IXOTH) {
1447 prevmask &= ~ACE_EXECUTE;
1448 mask &= ~ACE_EXECUTE;
1452 aclp->z_ops.ace_mask_set(acep, mask);
1453 aclp->z_ops.ace_mask_set(prevacep, prevmask);
1457 * Apply the chmod algorithm as described
1461 zfs_acl_chmod(zfsvfs_t *zfsvfs, uint64_t uid,
1462 uint64_t mode, zfs_acl_t *aclp)
1464 void *acep = NULL, *prevacep = NULL;
1469 int need_canonical_six = 1;
1470 uint16_t iflags, type;
1471 uint32_t access_mask;
1474 * If discard then just discard all ACL nodes which
1475 * represent the ACEs.
1477 * New owner@/group@/everone@ ACEs will be added
1480 if (zfsvfs->z_acl_mode == ZFS_ACL_DISCARD)
1481 zfs_acl_release_nodes(aclp);
1483 while (acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
1486 entry_type = (iflags & ACE_TYPE_FLAGS);
1487 iflags = (iflags & ALL_INHERIT);
1489 if ((type != ALLOW && type != DENY) ||
1490 (iflags & ACE_INHERIT_ONLY_ACE)) {
1492 aclp->z_hints |= ZFS_INHERIT_ACE;
1494 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1495 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1496 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1497 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
1498 aclp->z_hints |= ZFS_ACL_OBJ_ACE;
1505 * Need to split ace into two?
1507 if ((iflags & (ACE_FILE_INHERIT_ACE|
1508 ACE_DIRECTORY_INHERIT_ACE)) &&
1509 (!(iflags & ACE_INHERIT_ONLY_ACE))) {
1510 zfs_acl_split_ace(aclp, acep);
1511 aclp->z_hints |= ZFS_INHERIT_ACE;
1515 if (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
1516 (entry_type == OWNING_GROUP)) {
1517 access_mask &= ~OGE_CLEAR;
1518 aclp->z_ops.ace_mask_set(acep, access_mask);
1521 reuse_deny = B_TRUE;
1522 if (type == ALLOW) {
1525 * Check preceding ACE if any, to see
1526 * if we need to prepend a DENY ACE.
1527 * This is only applicable when the acl_mode
1528 * property == groupmask.
1530 if (zfsvfs->z_acl_mode == ZFS_ACL_GROUPMASK) {
1532 reuse_deny = zfs_reuse_deny(aclp, acep,
1537 zfs_acl_prepend_deny(uid,
1540 zfs_acl_prepend_fixup(
1544 zfs_fixup_group_entries(aclp, acep,
1554 * Check out last six aces, if we have six.
1557 if (aclp->z_acl_count >= 6) {
1558 if (zfs_have_canonical_six(aclp)) {
1559 need_canonical_six = 0;
1563 if (need_canonical_six) {
1564 size_t abstract_size = aclp->z_ops.ace_abstract_size();
1566 zfs_acl_node_t *aclnode =
1567 zfs_acl_node_alloc(abstract_size * 6);
1569 aclnode->z_size = abstract_size * 6;
1570 aclnode->z_ace_count = 6;
1571 aclp->z_acl_bytes += aclnode->z_size;
1572 list_insert_tail(&aclp->z_acl, aclnode);
1574 zacep = aclnode->z_acldata;
1577 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
1578 0, DENY, -1, ACE_OWNER);
1579 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
1580 OWNER_ALLOW_MASK, ALLOW, -1, ACE_OWNER);
1581 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++), 0,
1582 DENY, -1, OWNING_GROUP);
1583 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++), 0,
1584 ALLOW, -1, OWNING_GROUP);
1585 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
1586 EVERYONE_DENY_MASK, DENY, -1, ACE_EVERYONE);
1587 zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++),
1588 EVERYONE_ALLOW_MASK, ALLOW, -1, ACE_EVERYONE);
1589 aclp->z_acl_count += 6;
1592 zfs_acl_fixup_canonical_six(aclp, mode);
1596 zfs_acl_chmod_setattr(znode_t *zp, zfs_acl_t **aclp, uint64_t mode)
1600 mutex_enter(&zp->z_lock);
1601 mutex_enter(&zp->z_acl_lock);
1603 error = zfs_acl_node_read(zp, aclp, B_TRUE);
1605 (*aclp)->z_hints = zp->z_phys->zp_flags & V4_ACL_WIDE_FLAGS;
1606 zfs_acl_chmod(zp->z_zfsvfs, zp->z_phys->zp_uid, mode, *aclp);
1608 mutex_exit(&zp->z_acl_lock);
1609 mutex_exit(&zp->z_lock);
1614 * strip off write_owner and write_acl
1617 zfs_restricted_update(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, void *acep)
1619 uint32_t mask = aclp->z_ops.ace_mask_get(acep);
1621 if ((zfsvfs->z_acl_inherit == ZFS_ACL_RESTRICTED) &&
1622 (aclp->z_ops.ace_type_get(acep) == ALLOW)) {
1623 mask &= ~RESTRICTED_CLEAR;
1624 aclp->z_ops.ace_mask_set(acep, mask);
1629 * Should ACE be inherited?
1632 zfs_ace_can_use(vtype_t vtype, uint16_t acep_flags)
1634 int iflags = (acep_flags & 0xf);
1636 if ((vtype == VDIR) && (iflags & ACE_DIRECTORY_INHERIT_ACE))
1638 else if (iflags & ACE_FILE_INHERIT_ACE)
1639 return (!((vtype == VDIR) &&
1640 (iflags & ACE_NO_PROPAGATE_INHERIT_ACE)));
1645 * inherit inheritable ACEs from parent
1648 zfs_acl_inherit(zfsvfs_t *zfsvfs, vtype_t vtype, zfs_acl_t *paclp,
1649 uint64_t mode, boolean_t *need_chmod)
1653 zfs_acl_node_t *aclnode, *aclnode2;
1654 zfs_acl_t *aclp = NULL;
1656 uint32_t access_mask;
1657 uint16_t iflags, newflags, type;
1659 void *data1, *data2;
1660 size_t data1sz, data2sz;
1661 boolean_t vdir = vtype == VDIR;
1662 boolean_t vreg = vtype == VREG;
1663 boolean_t passthrough, passthrough_x, noallow;
1666 zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH_X;
1667 passthrough = passthrough_x ||
1668 zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH;
1670 zfsvfs->z_acl_inherit == ZFS_ACL_NOALLOW;
1672 *need_chmod = B_TRUE;
1674 aclp = zfs_acl_alloc(paclp->z_version);
1675 if (zfsvfs->z_acl_inherit == ZFS_ACL_DISCARD)
1677 while (pacep = zfs_acl_next_ace(paclp, pacep, &who,
1678 &access_mask, &iflags, &type)) {
1681 * don't inherit bogus ACEs
1683 if (!zfs_acl_valid_ace_type(type, iflags))
1686 if (noallow && type == ALLOW)
1689 ace_size = aclp->z_ops.ace_size(pacep);
1691 if (!zfs_ace_can_use(vtype, iflags))
1695 * If owner@, group@, or everyone@ inheritable
1696 * then zfs_acl_chmod() isn't needed.
1699 ((iflags & (ACE_OWNER|ACE_EVERYONE)) ||
1700 ((iflags & OWNING_GROUP) ==
1701 OWNING_GROUP)) && (vreg || (vdir && (iflags &
1702 ACE_DIRECTORY_INHERIT_ACE)))) {
1703 *need_chmod = B_FALSE;
1705 if (!vdir && passthrough_x &&
1706 ((mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0)) {
1707 access_mask &= ~ACE_EXECUTE;
1711 aclnode = zfs_acl_node_alloc(ace_size);
1712 list_insert_tail(&aclp->z_acl, aclnode);
1713 acep = aclnode->z_acldata;
1715 zfs_set_ace(aclp, acep, access_mask, type,
1716 who, iflags|ACE_INHERITED_ACE);
1719 * Copy special opaque data if any
1721 if ((data1sz = paclp->z_ops.ace_data(pacep, &data1)) != 0) {
1722 VERIFY((data2sz = aclp->z_ops.ace_data(acep,
1723 &data2)) == data1sz);
1724 bcopy(data1, data2, data2sz);
1726 aclp->z_acl_count++;
1727 aclnode->z_ace_count++;
1728 aclp->z_acl_bytes += aclnode->z_size;
1729 newflags = aclp->z_ops.ace_flags_get(acep);
1732 aclp->z_hints |= ZFS_INHERIT_ACE;
1734 if ((iflags & ACE_NO_PROPAGATE_INHERIT_ACE) || !vdir) {
1735 newflags &= ~ALL_INHERIT;
1736 aclp->z_ops.ace_flags_set(acep,
1737 newflags|ACE_INHERITED_ACE);
1738 zfs_restricted_update(zfsvfs, aclp, acep);
1744 newflags = aclp->z_ops.ace_flags_get(acep);
1745 if ((iflags & (ACE_FILE_INHERIT_ACE |
1746 ACE_DIRECTORY_INHERIT_ACE)) !=
1747 ACE_FILE_INHERIT_ACE) {
1748 aclnode2 = zfs_acl_node_alloc(ace_size);
1749 list_insert_tail(&aclp->z_acl, aclnode2);
1750 acep2 = aclnode2->z_acldata;
1751 zfs_set_ace(aclp, acep2,
1752 access_mask, type, who,
1753 iflags|ACE_INHERITED_ACE);
1754 newflags |= ACE_INHERIT_ONLY_ACE;
1755 aclp->z_ops.ace_flags_set(acep, newflags);
1756 newflags &= ~ALL_INHERIT;
1757 aclp->z_ops.ace_flags_set(acep2,
1758 newflags|ACE_INHERITED_ACE);
1761 * Copy special opaque data if any
1763 if ((data1sz = aclp->z_ops.ace_data(acep,
1766 aclp->z_ops.ace_data(acep2,
1767 &data2)) == data1sz);
1768 bcopy(data1, data2, data1sz);
1770 aclp->z_acl_count++;
1771 aclnode2->z_ace_count++;
1772 aclp->z_acl_bytes += aclnode->z_size;
1773 zfs_restricted_update(zfsvfs, aclp, acep2);
1775 newflags |= ACE_INHERIT_ONLY_ACE;
1776 aclp->z_ops.ace_flags_set(acep,
1777 newflags|ACE_INHERITED_ACE);
1784 * Create file system object initial permissions
1785 * including inheritable ACEs.
1788 zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
1789 vsecattr_t *vsecp, zfs_acl_ids_t *acl_ids)
1792 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
1795 boolean_t need_chmod = B_TRUE;
1797 bzero(acl_ids, sizeof (zfs_acl_ids_t));
1798 acl_ids->z_mode = MAKEIMODE(vap->va_type, vap->va_mode);
1801 if ((error = zfs_vsec_2_aclp(zfsvfs, vap->va_type, vsecp, cr,
1802 &acl_ids->z_fuidp, &acl_ids->z_aclp)) != 0)
1806 * Determine uid and gid.
1808 if ((flag & IS_ROOT_NODE) || zfsvfs->z_replay ||
1809 ((flag & IS_XATTR) && (vap->va_type == VDIR))) {
1810 acl_ids->z_fuid = zfs_fuid_create(zfsvfs,
1811 (uint64_t)vap->va_uid, cr,
1812 ZFS_OWNER, &acl_ids->z_fuidp);
1813 acl_ids->z_fgid = zfs_fuid_create(zfsvfs,
1814 (uint64_t)vap->va_gid, cr,
1815 ZFS_GROUP, &acl_ids->z_fuidp);
1818 acl_ids->z_fuid = zfs_fuid_create_cred(zfsvfs, ZFS_OWNER,
1819 cr, &acl_ids->z_fuidp);
1820 acl_ids->z_fgid = 0;
1821 if (vap->va_mask & AT_GID) {
1822 acl_ids->z_fgid = zfs_fuid_create(zfsvfs,
1823 (uint64_t)vap->va_gid,
1824 cr, ZFS_GROUP, &acl_ids->z_fuidp);
1826 if (acl_ids->z_fgid != dzp->z_phys->zp_gid &&
1827 !groupmember(vap->va_gid, cr) &&
1828 secpolicy_vnode_create_gid(cr) != 0)
1829 acl_ids->z_fgid = 0;
1831 if (acl_ids->z_fgid == 0) {
1832 if (dzp->z_phys->zp_mode & S_ISGID) {
1833 acl_ids->z_fgid = dzp->z_phys->zp_gid;
1834 gid = zfs_fuid_map_id(zfsvfs, acl_ids->z_fgid,
1837 acl_ids->z_fgid = zfs_fuid_create_cred(zfsvfs,
1838 ZFS_GROUP, cr, &acl_ids->z_fuidp);
1840 gid = acl_ids->z_fgid = dzp->z_phys->zp_gid;
1849 * If we're creating a directory, and the parent directory has the
1850 * set-GID bit set, set in on the new directory.
1851 * Otherwise, if the user is neither privileged nor a member of the
1852 * file's new group, clear the file's set-GID bit.
1855 if (!(flag & IS_ROOT_NODE) && (dzp->z_phys->zp_mode & S_ISGID) &&
1856 (vap->va_type == VDIR)) {
1857 acl_ids->z_mode |= S_ISGID;
1859 if ((acl_ids->z_mode & S_ISGID) &&
1860 secpolicy_vnode_setids_setgids(ZTOV(dzp), cr, gid) != 0)
1861 acl_ids->z_mode &= ~S_ISGID;
1864 if (acl_ids->z_aclp == NULL) {
1865 mutex_enter(&dzp->z_lock);
1866 if (!(flag & IS_ROOT_NODE) && (ZTOV(dzp)->v_type == VDIR &&
1867 (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE)) &&
1868 !(dzp->z_phys->zp_flags & ZFS_XATTR)) {
1869 mutex_enter(&dzp->z_acl_lock);
1870 VERIFY(0 == zfs_acl_node_read(dzp, &paclp, B_FALSE));
1871 mutex_exit(&dzp->z_acl_lock);
1872 acl_ids->z_aclp = zfs_acl_inherit(zfsvfs,
1873 vap->va_type, paclp, acl_ids->z_mode, &need_chmod);
1874 zfs_acl_free(paclp);
1877 zfs_acl_alloc(zfs_acl_version_zp(dzp));
1879 mutex_exit(&dzp->z_lock);
1881 acl_ids->z_aclp->z_hints = (vap->va_type == VDIR) ?
1882 ZFS_ACL_AUTO_INHERIT : 0;
1883 zfs_acl_chmod(zfsvfs, acl_ids->z_fuid,
1884 acl_ids->z_mode, acl_ids->z_aclp);
1892 * Free ACL and fuid_infop, but not the acl_ids structure
1895 zfs_acl_ids_free(zfs_acl_ids_t *acl_ids)
1897 if (acl_ids->z_aclp)
1898 zfs_acl_free(acl_ids->z_aclp);
1899 if (acl_ids->z_fuidp)
1900 zfs_fuid_info_free(acl_ids->z_fuidp);
1901 acl_ids->z_aclp = NULL;
1902 acl_ids->z_fuidp = NULL;
1906 zfs_acl_ids_overquota(zfsvfs_t *zfsvfs, zfs_acl_ids_t *acl_ids)
1908 return (zfs_usergroup_overquota(zfsvfs, B_FALSE, acl_ids->z_fuid) ||
1909 zfs_usergroup_overquota(zfsvfs, B_TRUE, acl_ids->z_fgid));
1913 * Retrieve a files ACL
1916 zfs_getacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
1924 mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT |
1925 VSA_ACE_ACLFLAGS | VSA_ACE_ALLTYPES);
1927 if (error = zfs_zaccess(zp, ACE_READ_ACL, 0, skipaclchk, cr))
1933 mutex_enter(&zp->z_acl_lock);
1935 error = zfs_acl_node_read(zp, &aclp, B_FALSE);
1937 mutex_exit(&zp->z_acl_lock);
1942 * Scan ACL to determine number of ACEs
1944 if ((zp->z_phys->zp_flags & ZFS_ACL_OBJ_ACE) &&
1945 !(mask & VSA_ACE_ALLTYPES)) {
1948 uint32_t access_mask;
1949 uint16_t type, iflags;
1951 while (zacep = zfs_acl_next_ace(aclp, zacep,
1952 &who, &access_mask, &iflags, &type)) {
1954 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1955 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1956 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1957 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
1964 vsecp->vsa_aclcnt = count;
1966 count = aclp->z_acl_count;
1968 if (mask & VSA_ACECNT) {
1969 vsecp->vsa_aclcnt = count;
1972 if (mask & VSA_ACE) {
1975 zfs_acl_node_t *aclnode = list_head(&aclp->z_acl);
1977 aclsz = count * sizeof (ace_t) +
1978 sizeof (ace_object_t) * largeace;
1980 vsecp->vsa_aclentp = kmem_alloc(aclsz, KM_SLEEP);
1981 vsecp->vsa_aclentsz = aclsz;
1983 if (aclp->z_version == ZFS_ACL_VERSION_FUID)
1984 zfs_copy_fuid_2_ace(zp->z_zfsvfs, aclp, cr,
1985 vsecp->vsa_aclentp, !(mask & VSA_ACE_ALLTYPES));
1987 bcopy(aclnode->z_acldata, vsecp->vsa_aclentp,
1988 count * sizeof (ace_t));
1991 if (mask & VSA_ACE_ACLFLAGS) {
1992 vsecp->vsa_aclflags = 0;
1993 if (zp->z_phys->zp_flags & ZFS_ACL_DEFAULTED)
1994 vsecp->vsa_aclflags |= ACL_DEFAULTED;
1995 if (zp->z_phys->zp_flags & ZFS_ACL_PROTECTED)
1996 vsecp->vsa_aclflags |= ACL_PROTECTED;
1997 if (zp->z_phys->zp_flags & ZFS_ACL_AUTO_INHERIT)
1998 vsecp->vsa_aclflags |= ACL_AUTO_INHERIT;
2001 mutex_exit(&zp->z_acl_lock);
2009 zfs_vsec_2_aclp(zfsvfs_t *zfsvfs, vtype_t obj_type,
2010 vsecattr_t *vsecp, cred_t *cr, zfs_fuid_info_t **fuidp, zfs_acl_t **zaclp)
2013 zfs_acl_node_t *aclnode;
2014 int aclcnt = vsecp->vsa_aclcnt;
2017 if (vsecp->vsa_aclcnt > MAX_ACL_ENTRIES || vsecp->vsa_aclcnt <= 0)
2020 aclp = zfs_acl_alloc(zfs_acl_version(zfsvfs->z_version));
2023 aclnode = zfs_acl_node_alloc(aclcnt * sizeof (zfs_object_ace_t));
2024 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
2025 if ((error = zfs_copy_ace_2_oldace(obj_type, aclp,
2026 (ace_t *)vsecp->vsa_aclentp, aclnode->z_acldata,
2027 aclcnt, &aclnode->z_size)) != 0) {
2029 zfs_acl_node_free(aclnode);
2033 if ((error = zfs_copy_ace_2_fuid(zfsvfs, obj_type, aclp,
2034 vsecp->vsa_aclentp, aclnode->z_acldata, aclcnt,
2035 &aclnode->z_size, fuidp, cr)) != 0) {
2037 zfs_acl_node_free(aclnode);
2041 aclp->z_acl_bytes = aclnode->z_size;
2042 aclnode->z_ace_count = aclcnt;
2043 aclp->z_acl_count = aclcnt;
2044 list_insert_head(&aclp->z_acl, aclnode);
2047 * If flags are being set then add them to z_hints
2049 if (vsecp->vsa_mask & VSA_ACE_ACLFLAGS) {
2050 if (vsecp->vsa_aclflags & ACL_PROTECTED)
2051 aclp->z_hints |= ZFS_ACL_PROTECTED;
2052 if (vsecp->vsa_aclflags & ACL_DEFAULTED)
2053 aclp->z_hints |= ZFS_ACL_DEFAULTED;
2054 if (vsecp->vsa_aclflags & ACL_AUTO_INHERIT)
2055 aclp->z_hints |= ZFS_ACL_AUTO_INHERIT;
2067 zfs_setacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
2069 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2070 zilog_t *zilog = zfsvfs->z_log;
2071 ulong_t mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT);
2075 zfs_fuid_info_t *fuidp = NULL;
2076 boolean_t fuid_dirtied;
2081 if (zp->z_phys->zp_flags & ZFS_IMMUTABLE)
2084 if (error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr))
2087 error = zfs_vsec_2_aclp(zfsvfs, ZTOV(zp)->v_type, vsecp, cr, &fuidp,
2093 * If ACL wide flags aren't being set then preserve any
2096 if (!(vsecp->vsa_mask & VSA_ACE_ACLFLAGS)) {
2097 aclp->z_hints |= (zp->z_phys->zp_flags & V4_ACL_WIDE_FLAGS);
2100 if (error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr)) {
2105 mutex_enter(&zp->z_lock);
2106 mutex_enter(&zp->z_acl_lock);
2108 tx = dmu_tx_create(zfsvfs->z_os);
2109 dmu_tx_hold_bonus(tx, zp->z_id);
2111 if (zp->z_phys->zp_acl.z_acl_extern_obj) {
2112 /* Are we upgrading ACL? */
2113 if (zfsvfs->z_version <= ZPL_VERSION_FUID &&
2114 zp->z_phys->zp_acl.z_acl_version ==
2115 ZFS_ACL_VERSION_INITIAL) {
2116 dmu_tx_hold_free(tx,
2117 zp->z_phys->zp_acl.z_acl_extern_obj,
2119 dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
2120 0, aclp->z_acl_bytes);
2122 dmu_tx_hold_write(tx,
2123 zp->z_phys->zp_acl.z_acl_extern_obj,
2124 0, aclp->z_acl_bytes);
2126 } else if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
2127 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, aclp->z_acl_bytes);
2129 fuid_dirtied = zfsvfs->z_fuid_dirty;
2131 zfs_fuid_txhold(zfsvfs, tx);
2133 error = dmu_tx_assign(tx, TXG_NOWAIT);
2135 mutex_exit(&zp->z_acl_lock);
2136 mutex_exit(&zp->z_lock);
2138 if (error == ERESTART) {
2148 error = zfs_aclset_common(zp, aclp, cr, tx);
2152 zfs_fuid_sync(zfsvfs, tx);
2154 zfs_time_stamper_locked(zp, STATE_CHANGED, tx);
2155 zfs_log_acl(zilog, tx, zp, vsecp, fuidp);
2158 zfs_fuid_info_free(fuidp);
2162 mutex_exit(&zp->z_acl_lock);
2163 mutex_exit(&zp->z_lock);
2169 * working_mode returns the permissions that were not granted
2172 zfs_zaccess_common(znode_t *zp, uint32_t v4_mode, uint32_t *working_mode,
2173 boolean_t *check_privs, boolean_t skipaclchk, cred_t *cr)
2176 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2178 uid_t uid = crgetuid(cr);
2180 uint16_t type, iflags;
2181 uint16_t entry_type;
2182 uint32_t access_mask;
2183 uint32_t deny_mask = 0;
2184 zfs_ace_hdr_t *acep = NULL;
2190 * Short circuit empty requests
2195 *check_privs = B_TRUE;
2197 if (zfsvfs->z_replay) {
2202 *working_mode = v4_mode;
2204 if ((v4_mode & WRITE_MASK) &&
2205 (zp->z_zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) &&
2206 (!IS_DEVVP(ZTOV(zp)) ||
2207 (IS_DEVVP(ZTOV(zp)) && (v4_mode & WRITE_MASK_ATTRS)))) {
2208 *check_privs = B_FALSE;
2213 * Only check for READONLY on non-directories.
2215 if ((v4_mode & WRITE_MASK_DATA) &&
2216 (((ZTOV(zp)->v_type != VDIR) &&
2217 (zp->z_phys->zp_flags & (ZFS_READONLY | ZFS_IMMUTABLE))) ||
2218 (ZTOV(zp)->v_type == VDIR &&
2219 (zp->z_phys->zp_flags & ZFS_IMMUTABLE)))) {
2220 *check_privs = B_FALSE;
2225 if ((v4_mode & (ACE_DELETE | ACE_DELETE_CHILD)) &&
2226 (zp->z_phys->zp_flags & ZFS_NOUNLINK)) {
2227 *check_privs = B_FALSE;
2232 * In FreeBSD we allow to modify directory's content is ZFS_NOUNLINK
2233 * (sunlnk) is set. We just don't allow directory removal, which is
2234 * handled in zfs_zaccess_delete().
2236 if ((v4_mode & ACE_DELETE) &&
2237 (zp->z_phys->zp_flags & ZFS_NOUNLINK)) {
2238 *check_privs = B_FALSE;
2243 if (((v4_mode & (ACE_READ_DATA|ACE_EXECUTE)) &&
2244 (zp->z_phys->zp_flags & ZFS_AV_QUARANTINED))) {
2245 *check_privs = B_FALSE;
2250 * The caller requested that the ACL check be skipped. This
2251 * would only happen if the caller checked VOP_ACCESS() with a
2252 * 32 bit ACE mask and already had the appropriate permissions.
2259 zfs_fuid_map_ids(zp, cr, &fowner, &gowner);
2261 mutex_enter(&zp->z_acl_lock);
2263 error = zfs_acl_node_read(zp, &aclp, B_FALSE);
2265 mutex_exit(&zp->z_acl_lock);
2269 while (acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
2272 if (!zfs_acl_valid_ace_type(type, iflags))
2275 if (ZTOV(zp)->v_type == VDIR && (iflags & ACE_INHERIT_ONLY_ACE))
2278 entry_type = (iflags & ACE_TYPE_FLAGS);
2282 switch (entry_type) {
2290 case ACE_IDENTIFIER_GROUP:
2291 checkit = zfs_groupmember(zfsvfs, who, cr);
2299 if (entry_type == 0) {
2302 newid = zfs_fuid_map_id(zfsvfs, who, cr,
2304 if (newid != IDMAP_WK_CREATOR_OWNER_UID &&
2310 mutex_exit(&zp->z_acl_lock);
2316 uint32_t mask_matched = (access_mask & *working_mode);
2320 deny_mask |= mask_matched;
2322 *working_mode &= ~mask_matched;
2327 if (*working_mode == 0)
2331 mutex_exit(&zp->z_acl_lock);
2334 /* Put the found 'denies' back on the working mode */
2336 *working_mode |= deny_mask;
2338 } else if (*working_mode) {
2346 zfs_zaccess_append(znode_t *zp, uint32_t *working_mode, boolean_t *check_privs,
2349 if (*working_mode != ACE_WRITE_DATA)
2352 return (zfs_zaccess_common(zp, ACE_APPEND_DATA, working_mode,
2353 check_privs, B_FALSE, cr));
2357 * Determine whether Access should be granted/denied, invoking least
2358 * priv subsytem when a deny is determined.
2361 zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr)
2363 uint32_t working_mode;
2366 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2367 boolean_t check_privs;
2369 znode_t *check_zp = zp;
2371 is_attr = ((zp->z_phys->zp_flags & ZFS_XATTR) &&
2372 (ZTOV(zp)->v_type == VDIR));
2376 * In FreeBSD, we don't care about permissions of individual ADS.
2377 * Note that not checking them is not just an optimization - without
2378 * this shortcut, EA operations may bogusly fail with EACCES.
2380 if (zp->z_phys->zp_flags & ZFS_XATTR)
2384 * If attribute then validate against base file
2387 if ((error = zfs_zget(zp->z_zfsvfs,
2388 zp->z_phys->zp_parent, &xzp)) != 0) {
2395 * fixup mode to map to xattr perms
2398 if (mode & (ACE_WRITE_DATA|ACE_APPEND_DATA)) {
2399 mode &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
2400 mode |= ACE_WRITE_NAMED_ATTRS;
2403 if (mode & (ACE_READ_DATA|ACE_EXECUTE)) {
2404 mode &= ~(ACE_READ_DATA|ACE_EXECUTE);
2405 mode |= ACE_READ_NAMED_ATTRS;
2410 if ((error = zfs_zaccess_common(check_zp, mode, &working_mode,
2411 &check_privs, skipaclchk, cr)) == 0) {
2417 if (error && !check_privs) {
2423 if (error && (flags & V_APPEND)) {
2424 error = zfs_zaccess_append(zp, &working_mode, &check_privs, cr);
2427 if (error && check_privs) {
2429 mode_t checkmode = 0;
2431 owner = zfs_fuid_map_id(zfsvfs, check_zp->z_phys->zp_uid, cr,
2435 * First check for implicit owner permission on
2436 * read_acl/read_attributes
2440 ASSERT(working_mode != 0);
2442 if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES) &&
2443 owner == crgetuid(cr)))
2444 working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES);
2446 if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS|
2447 ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE))
2449 if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
2450 ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
2451 checkmode |= VWRITE;
2452 if (working_mode & ACE_EXECUTE)
2456 error = secpolicy_vnode_access(cr, ZTOV(check_zp),
2459 if (error == 0 && (working_mode & ACE_WRITE_OWNER))
2460 error = secpolicy_vnode_chown(ZTOV(check_zp), cr, B_TRUE);
2461 if (error == 0 && (working_mode & ACE_WRITE_ACL))
2462 error = secpolicy_vnode_setdac(ZTOV(check_zp), cr, owner);
2464 if (error == 0 && (working_mode &
2465 (ACE_DELETE|ACE_DELETE_CHILD)))
2466 error = secpolicy_vnode_remove(ZTOV(check_zp), cr);
2468 if (error == 0 && (working_mode & ACE_SYNCHRONIZE)) {
2469 error = secpolicy_vnode_chown(ZTOV(check_zp), cr, B_FALSE);
2473 * See if any bits other than those already checked
2474 * for are still present. If so then return EACCES
2476 if (working_mode & ~(ZFS_CHECKED_MASKS)) {
2489 * Translate traditional unix VREAD/VWRITE/VEXEC mode into
2490 * native ACL format and call zfs_zaccess()
2493 zfs_zaccess_rwx(znode_t *zp, mode_t mode, int flags, cred_t *cr)
2495 return (zfs_zaccess(zp, zfs_unix_to_v4(mode >> 6), flags, B_FALSE, cr));
2499 * Access function for secpolicy_vnode_setattr
2502 zfs_zaccess_unix(znode_t *zp, mode_t mode, cred_t *cr)
2504 int v4_mode = zfs_unix_to_v4(mode >> 6);
2506 return (zfs_zaccess(zp, v4_mode, 0, B_FALSE, cr));
2510 zfs_delete_final_check(znode_t *zp, znode_t *dzp,
2511 mode_t missing_perms, cred_t *cr)
2515 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2517 downer = zfs_fuid_map_id(zfsvfs, dzp->z_phys->zp_uid, cr, ZFS_OWNER);
2519 error = secpolicy_vnode_access(cr, ZTOV(dzp), downer, missing_perms);
2522 error = zfs_sticky_remove_access(dzp, zp, cr);
2528 * Determine whether Access should be granted/deny, without
2529 * consulting least priv subsystem.
2532 * The following chart is the recommended NFSv4 enforcement for
2533 * ability to delete an object.
2535 * -------------------------------------------------------
2536 * | Parent Dir | Target Object Permissions |
2538 * -------------------------------------------------------
2539 * | | ACL Allows | ACL Denies| Delete |
2540 * | | Delete | Delete | unspecified|
2541 * -------------------------------------------------------
2542 * | ACL Allows | Permit | Permit | Permit |
2543 * | DELETE_CHILD | |
2544 * -------------------------------------------------------
2545 * | ACL Denies | Permit | Deny | Deny |
2546 * | DELETE_CHILD | | | |
2547 * -------------------------------------------------------
2548 * | ACL specifies | | | |
2549 * | only allow | Permit | Permit | Permit |
2550 * | write and | | | |
2552 * -------------------------------------------------------
2553 * | ACL denies | | | |
2554 * | write and | Permit | Deny | Deny |
2556 * -------------------------------------------------------
2559 * No search privilege, can't even look up file?
2563 zfs_zaccess_delete(znode_t *dzp, znode_t *zp, cred_t *cr)
2565 uint32_t dzp_working_mode = 0;
2566 uint32_t zp_working_mode = 0;
2567 int dzp_error, zp_error;
2568 mode_t missing_perms;
2569 boolean_t dzpcheck_privs = B_TRUE;
2570 boolean_t zpcheck_privs = B_TRUE;
2573 * We want specific DELETE permissions to
2574 * take precedence over WRITE/EXECUTE. We don't
2575 * want an ACL such as this to mess us up.
2576 * user:joe:write_data:deny,user:joe:delete:allow
2578 * However, deny permissions may ultimately be overridden
2579 * by secpolicy_vnode_access().
2581 * We will ask for all of the necessary permissions and then
2582 * look at the working modes from the directory and target object
2583 * to determine what was found.
2586 if (zp->z_phys->zp_flags & (ZFS_IMMUTABLE | ZFS_NOUNLINK))
2591 * If the directory permissions allow the delete, we are done.
2593 if ((dzp_error = zfs_zaccess_common(dzp, ACE_DELETE_CHILD,
2594 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0)
2598 * If target object has delete permission then we are done
2600 if ((zp_error = zfs_zaccess_common(zp, ACE_DELETE, &zp_working_mode,
2601 &zpcheck_privs, B_FALSE, cr)) == 0)
2604 ASSERT(dzp_error && zp_error);
2606 if (!dzpcheck_privs)
2614 * If directory returns EACCES then delete_child was denied
2615 * due to deny delete_child. In this case send the request through
2616 * secpolicy_vnode_remove(). We don't use zfs_delete_final_check()
2617 * since that *could* allow the delete based on write/execute permission
2618 * and we want delete permissions to override write/execute.
2621 if (dzp_error == EACCES)
2622 return (secpolicy_vnode_remove(ZTOV(dzp), cr)); /* XXXPJD: s/dzp/zp/ ? */
2626 * only need to see if we have write/execute on directory.
2629 if ((dzp_error = zfs_zaccess_common(dzp, ACE_EXECUTE|ACE_WRITE_DATA,
2630 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0)
2631 return (zfs_sticky_remove_access(dzp, zp, cr));
2633 if (!dzpcheck_privs)
2640 missing_perms = (dzp_working_mode & ACE_WRITE_DATA) ? VWRITE : 0;
2641 missing_perms |= (dzp_working_mode & ACE_EXECUTE) ? VEXEC : 0;
2643 ASSERT(missing_perms);
2645 return (zfs_delete_final_check(zp, dzp, missing_perms, cr));
2650 zfs_zaccess_rename(znode_t *sdzp, znode_t *szp, znode_t *tdzp,
2651 znode_t *tzp, cred_t *cr)
2656 if (szp->z_phys->zp_flags & ZFS_AV_QUARANTINED)
2659 add_perm = (ZTOV(szp)->v_type == VDIR) ?
2660 ACE_ADD_SUBDIRECTORY : ACE_ADD_FILE;
2663 * Rename permissions are combination of delete permission +
2664 * add file/subdir permission.
2666 * BSD operating systems also require write permission
2667 * on the directory being moved from one parent directory
2670 if (ZTOV(szp)->v_type == VDIR && ZTOV(sdzp) != ZTOV(tdzp)) {
2671 if (error = zfs_zaccess(szp, ACE_WRITE_DATA, 0, B_FALSE, cr))
2676 * first make sure we do the delete portion.
2678 * If that succeeds then check for add_file/add_subdir permissions
2681 if (error = zfs_zaccess_delete(sdzp, szp, cr))
2685 * If we have a tzp, see if we can delete it?
2688 if (error = zfs_zaccess_delete(tdzp, tzp, cr))
2693 * Now check for add permissions
2695 error = zfs_zaccess(tdzp, add_perm, 0, B_FALSE, cr);