4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
26 #include <sys/types.h>
27 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/sysmacros.h>
31 #include <sys/resource.h>
33 #include <sys/vnode.h>
38 #include <sys/cmn_err.h>
39 #include <sys/errno.h>
40 #include <sys/unistd.h>
42 #include <sys/fs/zfs.h>
44 #include <sys/policy.h>
45 #include <sys/zfs_znode.h>
46 #include <sys/zfs_fuid.h>
47 #include <sys/zfs_acl.h>
48 #include <sys/zfs_dir.h>
49 #include <sys/zfs_vfsops.h>
51 #include <sys/dnode.h>
54 #include "fs/fs_subr.h"
56 #define ALLOW ACE_ACCESS_ALLOWED_ACE_TYPE
57 #define DENY ACE_ACCESS_DENIED_ACE_TYPE
58 #define MAX_ACE_TYPE ACE_SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE
59 #define MIN_ACE_TYPE ALLOW
61 #define OWNING_GROUP (ACE_GROUP|ACE_IDENTIFIER_GROUP)
62 #define EVERYONE_ALLOW_MASK (ACE_READ_ACL|ACE_READ_ATTRIBUTES | \
63 ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE)
64 #define EVERYONE_DENY_MASK (ACE_WRITE_ACL|ACE_WRITE_OWNER | \
65 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
66 #define OWNER_ALLOW_MASK (ACE_WRITE_ACL | ACE_WRITE_OWNER | \
67 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
69 #define ZFS_CHECKED_MASKS (ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_READ_DATA| \
70 ACE_READ_NAMED_ATTRS|ACE_WRITE_DATA|ACE_WRITE_ATTRIBUTES| \
71 ACE_WRITE_NAMED_ATTRS|ACE_APPEND_DATA|ACE_EXECUTE|ACE_WRITE_OWNER| \
72 ACE_WRITE_ACL|ACE_DELETE|ACE_DELETE_CHILD|ACE_SYNCHRONIZE)
74 #define WRITE_MASK_DATA (ACE_WRITE_DATA|ACE_APPEND_DATA|ACE_WRITE_NAMED_ATTRS)
75 #define WRITE_MASK_ATTRS (ACE_WRITE_ACL|ACE_WRITE_OWNER|ACE_WRITE_ATTRIBUTES| \
76 ACE_DELETE|ACE_DELETE_CHILD)
77 #define WRITE_MASK (WRITE_MASK_DATA|WRITE_MASK_ATTRS)
79 #define OGE_CLEAR (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
80 ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
82 #define OKAY_MASK_BITS (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
83 ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
85 #define ALL_INHERIT (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE | \
86 ACE_NO_PROPAGATE_INHERIT_ACE|ACE_INHERIT_ONLY_ACE|ACE_INHERITED_ACE)
88 #define RESTRICTED_CLEAR (ACE_WRITE_ACL|ACE_WRITE_OWNER)
90 #define V4_ACL_WIDE_FLAGS (ZFS_ACL_AUTO_INHERIT|ZFS_ACL_DEFAULTED|\
93 #define ZFS_ACL_WIDE_FLAGS (V4_ACL_WIDE_FLAGS|ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|\
96 #define ALL_MODE_EXECS (S_IXUSR | S_IXGRP | S_IXOTH)
99 zfs_ace_v0_get_type(void *acep)
101 return (((zfs_oldace_t *)acep)->z_type);
105 zfs_ace_v0_get_flags(void *acep)
107 return (((zfs_oldace_t *)acep)->z_flags);
111 zfs_ace_v0_get_mask(void *acep)
113 return (((zfs_oldace_t *)acep)->z_access_mask);
117 zfs_ace_v0_get_who(void *acep)
119 return (((zfs_oldace_t *)acep)->z_fuid);
123 zfs_ace_v0_set_type(void *acep, uint16_t type)
125 ((zfs_oldace_t *)acep)->z_type = type;
129 zfs_ace_v0_set_flags(void *acep, uint16_t flags)
131 ((zfs_oldace_t *)acep)->z_flags = flags;
135 zfs_ace_v0_set_mask(void *acep, uint32_t mask)
137 ((zfs_oldace_t *)acep)->z_access_mask = mask;
141 zfs_ace_v0_set_who(void *acep, uint64_t who)
143 ((zfs_oldace_t *)acep)->z_fuid = who;
148 zfs_ace_v0_size(void *acep)
150 return (sizeof (zfs_oldace_t));
154 zfs_ace_v0_abstract_size(void)
156 return (sizeof (zfs_oldace_t));
160 zfs_ace_v0_mask_off(void)
162 return (offsetof(zfs_oldace_t, z_access_mask));
167 zfs_ace_v0_data(void *acep, void **datap)
173 static acl_ops_t zfs_acl_v0_ops = {
176 zfs_ace_v0_get_flags,
177 zfs_ace_v0_set_flags,
183 zfs_ace_v0_abstract_size,
189 zfs_ace_fuid_get_type(void *acep)
191 return (((zfs_ace_hdr_t *)acep)->z_type);
195 zfs_ace_fuid_get_flags(void *acep)
197 return (((zfs_ace_hdr_t *)acep)->z_flags);
201 zfs_ace_fuid_get_mask(void *acep)
203 return (((zfs_ace_hdr_t *)acep)->z_access_mask);
207 zfs_ace_fuid_get_who(void *args)
210 zfs_ace_t *acep = args;
212 entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
214 if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
215 entry_type == ACE_EVERYONE)
217 return (((zfs_ace_t *)acep)->z_fuid);
221 zfs_ace_fuid_set_type(void *acep, uint16_t type)
223 ((zfs_ace_hdr_t *)acep)->z_type = type;
227 zfs_ace_fuid_set_flags(void *acep, uint16_t flags)
229 ((zfs_ace_hdr_t *)acep)->z_flags = flags;
233 zfs_ace_fuid_set_mask(void *acep, uint32_t mask)
235 ((zfs_ace_hdr_t *)acep)->z_access_mask = mask;
239 zfs_ace_fuid_set_who(void *arg, uint64_t who)
241 zfs_ace_t *acep = arg;
243 uint16_t entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
245 if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
246 entry_type == ACE_EVERYONE)
252 zfs_ace_fuid_size(void *acep)
254 zfs_ace_hdr_t *zacep = acep;
257 switch (zacep->z_type) {
258 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
259 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
260 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
261 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
262 return (sizeof (zfs_object_ace_t));
266 (((zfs_ace_hdr_t *)acep)->z_flags & ACE_TYPE_FLAGS);
267 if (entry_type == ACE_OWNER ||
268 entry_type == OWNING_GROUP ||
269 entry_type == ACE_EVERYONE)
270 return (sizeof (zfs_ace_hdr_t));
273 return (sizeof (zfs_ace_t));
278 zfs_ace_fuid_abstract_size(void)
280 return (sizeof (zfs_ace_hdr_t));
284 zfs_ace_fuid_mask_off(void)
286 return (offsetof(zfs_ace_hdr_t, z_access_mask));
290 zfs_ace_fuid_data(void *acep, void **datap)
292 zfs_ace_t *zacep = acep;
293 zfs_object_ace_t *zobjp;
295 switch (zacep->z_hdr.z_type) {
296 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
297 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
298 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
299 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
301 *datap = (caddr_t)zobjp + sizeof (zfs_ace_t);
302 return (sizeof (zfs_object_ace_t) - sizeof (zfs_ace_t));
309 static acl_ops_t zfs_acl_fuid_ops = {
310 zfs_ace_fuid_get_mask,
311 zfs_ace_fuid_set_mask,
312 zfs_ace_fuid_get_flags,
313 zfs_ace_fuid_set_flags,
314 zfs_ace_fuid_get_type,
315 zfs_ace_fuid_set_type,
316 zfs_ace_fuid_get_who,
317 zfs_ace_fuid_set_who,
319 zfs_ace_fuid_abstract_size,
320 zfs_ace_fuid_mask_off,
325 * The following three functions are provided for compatibility with
326 * older ZPL version in order to determine if the file use to have
327 * an external ACL and what version of ACL previously existed on the
328 * file. Would really be nice to not need this, sigh.
331 zfs_external_acl(znode_t *zp)
333 zfs_acl_phys_t acl_phys;
340 * Need to deal with a potential
341 * race where zfs_sa_upgrade could cause
342 * z_isa_sa to change.
344 * If the lookup fails then the state of z_is_sa should have
348 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(ZTOZSB(zp)),
349 &acl_phys, sizeof (acl_phys))) == 0)
350 return (acl_phys.z_acl_extern_obj);
353 * after upgrade the SA_ZPL_ZNODE_ACL should have been
356 VERIFY(zp->z_is_sa && error == ENOENT);
362 * Determine size of ACL in bytes
364 * This is more complicated than it should be since we have to deal
365 * with old external ACLs.
368 zfs_acl_znode_info(znode_t *zp, int *aclsize, int *aclcount,
369 zfs_acl_phys_t *aclphys)
371 zfs_sb_t *zsb = ZTOZSB(zp);
376 ASSERT(MUTEX_HELD(&zp->z_acl_lock));
378 if ((error = sa_size(zp->z_sa_hdl, SA_ZPL_DACL_ACES(zsb),
382 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DACL_COUNT(zsb),
383 &acl_count, sizeof (acl_count))) != 0)
385 *aclcount = acl_count;
387 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zsb),
388 aclphys, sizeof (*aclphys))) != 0)
391 if (aclphys->z_acl_version == ZFS_ACL_VERSION_INITIAL) {
392 *aclsize = ZFS_ACL_SIZE(aclphys->z_acl_size);
393 *aclcount = aclphys->z_acl_size;
395 *aclsize = aclphys->z_acl_size;
396 *aclcount = aclphys->z_acl_count;
403 zfs_znode_acl_version(znode_t *zp)
405 zfs_acl_phys_t acl_phys;
408 return (ZFS_ACL_VERSION_FUID);
413 * Need to deal with a potential
414 * race where zfs_sa_upgrade could cause
415 * z_isa_sa to change.
417 * If the lookup fails then the state of z_is_sa should have
420 if ((error = sa_lookup(zp->z_sa_hdl,
421 SA_ZPL_ZNODE_ACL(ZTOZSB(zp)),
422 &acl_phys, sizeof (acl_phys))) == 0)
423 return (acl_phys.z_acl_version);
426 * After upgrade SA_ZPL_ZNODE_ACL should have
429 VERIFY(zp->z_is_sa && error == ENOENT);
430 return (ZFS_ACL_VERSION_FUID);
436 zfs_acl_version(int version)
438 if (version < ZPL_VERSION_FUID)
439 return (ZFS_ACL_VERSION_INITIAL);
441 return (ZFS_ACL_VERSION_FUID);
445 zfs_acl_version_zp(znode_t *zp)
447 return (zfs_acl_version(ZTOZSB(zp)->z_version));
451 zfs_acl_alloc(int vers)
455 aclp = kmem_zalloc(sizeof (zfs_acl_t), KM_PUSHPAGE);
456 list_create(&aclp->z_acl, sizeof (zfs_acl_node_t),
457 offsetof(zfs_acl_node_t, z_next));
458 aclp->z_version = vers;
459 if (vers == ZFS_ACL_VERSION_FUID)
460 aclp->z_ops = &zfs_acl_fuid_ops;
462 aclp->z_ops = &zfs_acl_v0_ops;
467 zfs_acl_node_alloc(size_t bytes)
469 zfs_acl_node_t *aclnode;
471 aclnode = kmem_zalloc(sizeof (zfs_acl_node_t), KM_PUSHPAGE);
473 aclnode->z_acldata = kmem_alloc(bytes, KM_PUSHPAGE);
474 aclnode->z_allocdata = aclnode->z_acldata;
475 aclnode->z_allocsize = bytes;
476 aclnode->z_size = bytes;
483 zfs_acl_node_free(zfs_acl_node_t *aclnode)
485 if (aclnode->z_allocsize)
486 kmem_free(aclnode->z_allocdata, aclnode->z_allocsize);
487 kmem_free(aclnode, sizeof (zfs_acl_node_t));
491 zfs_acl_release_nodes(zfs_acl_t *aclp)
493 zfs_acl_node_t *aclnode;
495 while ((aclnode = list_head(&aclp->z_acl))) {
496 list_remove(&aclp->z_acl, aclnode);
497 zfs_acl_node_free(aclnode);
499 aclp->z_acl_count = 0;
500 aclp->z_acl_bytes = 0;
504 zfs_acl_free(zfs_acl_t *aclp)
506 zfs_acl_release_nodes(aclp);
507 list_destroy(&aclp->z_acl);
508 kmem_free(aclp, sizeof (zfs_acl_t));
512 zfs_acl_valid_ace_type(uint_t type, uint_t flags)
519 case ACE_SYSTEM_AUDIT_ACE_TYPE:
520 case ACE_SYSTEM_ALARM_ACE_TYPE:
521 entry_type = flags & ACE_TYPE_FLAGS;
522 return (entry_type == ACE_OWNER ||
523 entry_type == OWNING_GROUP ||
524 entry_type == ACE_EVERYONE || entry_type == 0 ||
525 entry_type == ACE_IDENTIFIER_GROUP);
527 if (type >= MIN_ACE_TYPE && type <= MAX_ACE_TYPE)
534 zfs_ace_valid(umode_t obj_mode, zfs_acl_t *aclp, uint16_t type, uint16_t iflags)
537 * first check type of entry
540 if (!zfs_acl_valid_ace_type(type, iflags))
544 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
545 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
546 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
547 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
548 if (aclp->z_version < ZFS_ACL_VERSION_FUID)
550 aclp->z_hints |= ZFS_ACL_OBJ_ACE;
554 * next check inheritance level flags
557 if (S_ISDIR(obj_mode) &&
558 (iflags & (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE)))
559 aclp->z_hints |= ZFS_INHERIT_ACE;
561 if (iflags & (ACE_INHERIT_ONLY_ACE|ACE_NO_PROPAGATE_INHERIT_ACE)) {
562 if ((iflags & (ACE_FILE_INHERIT_ACE|
563 ACE_DIRECTORY_INHERIT_ACE)) == 0) {
572 zfs_acl_next_ace(zfs_acl_t *aclp, void *start, uint64_t *who,
573 uint32_t *access_mask, uint16_t *iflags, uint16_t *type)
575 zfs_acl_node_t *aclnode;
580 aclnode = list_head(&aclp->z_acl);
584 aclp->z_next_ace = aclnode->z_acldata;
585 aclp->z_curr_node = aclnode;
586 aclnode->z_ace_idx = 0;
589 aclnode = aclp->z_curr_node;
594 if (aclnode->z_ace_idx >= aclnode->z_ace_count) {
595 aclnode = list_next(&aclp->z_acl, aclnode);
599 aclp->z_curr_node = aclnode;
600 aclnode->z_ace_idx = 0;
601 aclp->z_next_ace = aclnode->z_acldata;
605 if (aclnode->z_ace_idx < aclnode->z_ace_count) {
606 void *acep = aclp->z_next_ace;
610 * Make sure we don't overstep our bounds
612 ace_size = aclp->z_ops->ace_size(acep);
614 if (((caddr_t)acep + ace_size) >
615 ((caddr_t)aclnode->z_acldata + aclnode->z_size)) {
619 *iflags = aclp->z_ops->ace_flags_get(acep);
620 *type = aclp->z_ops->ace_type_get(acep);
621 *access_mask = aclp->z_ops->ace_mask_get(acep);
622 *who = aclp->z_ops->ace_who_get(acep);
623 aclp->z_next_ace = (caddr_t)aclp->z_next_ace + ace_size;
624 aclnode->z_ace_idx++;
626 return ((void *)acep);
633 zfs_ace_walk(void *datap, uint64_t cookie, int aclcnt,
634 uint16_t *flags, uint16_t *type, uint32_t *mask)
636 zfs_acl_t *aclp = datap;
637 zfs_ace_hdr_t *acep = (zfs_ace_hdr_t *)(uintptr_t)cookie;
640 acep = zfs_acl_next_ace(aclp, acep, &who, mask,
642 return ((uint64_t)(uintptr_t)acep);
646 * Copy ACE to internal ZFS format.
647 * While processing the ACL each ACE will be validated for correctness.
648 * ACE FUIDs will be created later.
651 zfs_copy_ace_2_fuid(zfs_sb_t *zsb, umode_t obj_mode, zfs_acl_t *aclp,
652 void *datap, zfs_ace_t *z_acl, uint64_t aclcnt, size_t *size,
653 zfs_fuid_info_t **fuidp, cred_t *cr)
657 zfs_ace_t *aceptr = z_acl;
659 zfs_object_ace_t *zobjacep;
660 ace_object_t *aceobjp;
662 for (i = 0; i != aclcnt; i++) {
663 aceptr->z_hdr.z_access_mask = acep->a_access_mask;
664 aceptr->z_hdr.z_flags = acep->a_flags;
665 aceptr->z_hdr.z_type = acep->a_type;
666 entry_type = aceptr->z_hdr.z_flags & ACE_TYPE_FLAGS;
667 if (entry_type != ACE_OWNER && entry_type != OWNING_GROUP &&
668 entry_type != ACE_EVERYONE) {
669 aceptr->z_fuid = zfs_fuid_create(zsb, acep->a_who,
670 cr, (entry_type == 0) ?
671 ZFS_ACE_USER : ZFS_ACE_GROUP, fuidp);
675 * Make sure ACE is valid
677 if (zfs_ace_valid(obj_mode, aclp, aceptr->z_hdr.z_type,
678 aceptr->z_hdr.z_flags) != B_TRUE)
681 switch (acep->a_type) {
682 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
683 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
684 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
685 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
686 zobjacep = (zfs_object_ace_t *)aceptr;
687 aceobjp = (ace_object_t *)acep;
689 bcopy(aceobjp->a_obj_type, zobjacep->z_object_type,
690 sizeof (aceobjp->a_obj_type));
691 bcopy(aceobjp->a_inherit_obj_type,
692 zobjacep->z_inherit_type,
693 sizeof (aceobjp->a_inherit_obj_type));
694 acep = (ace_t *)((caddr_t)acep + sizeof (ace_object_t));
697 acep = (ace_t *)((caddr_t)acep + sizeof (ace_t));
700 aceptr = (zfs_ace_t *)((caddr_t)aceptr +
701 aclp->z_ops->ace_size(aceptr));
704 *size = (caddr_t)aceptr - (caddr_t)z_acl;
710 * Copy ZFS ACEs to fixed size ace_t layout
713 zfs_copy_fuid_2_ace(zfs_sb_t *zsb, zfs_acl_t *aclp, cred_t *cr,
714 void *datap, int filter)
717 uint32_t access_mask;
718 uint16_t iflags, type;
719 zfs_ace_hdr_t *zacep = NULL;
721 ace_object_t *objacep;
722 zfs_object_ace_t *zobjacep;
726 while ((zacep = zfs_acl_next_ace(aclp, zacep,
727 &who, &access_mask, &iflags, &type))) {
730 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
731 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
732 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
733 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
737 zobjacep = (zfs_object_ace_t *)zacep;
738 objacep = (ace_object_t *)acep;
739 bcopy(zobjacep->z_object_type,
741 sizeof (zobjacep->z_object_type));
742 bcopy(zobjacep->z_inherit_type,
743 objacep->a_inherit_obj_type,
744 sizeof (zobjacep->z_inherit_type));
745 ace_size = sizeof (ace_object_t);
748 ace_size = sizeof (ace_t);
752 entry_type = (iflags & ACE_TYPE_FLAGS);
753 if ((entry_type != ACE_OWNER &&
754 entry_type != OWNING_GROUP &&
755 entry_type != ACE_EVERYONE)) {
756 acep->a_who = zfs_fuid_map_id(zsb, who,
757 cr, (entry_type & ACE_IDENTIFIER_GROUP) ?
758 ZFS_ACE_GROUP : ZFS_ACE_USER);
760 acep->a_who = (uid_t)(int64_t)who;
762 acep->a_access_mask = access_mask;
763 acep->a_flags = iflags;
765 acep = (ace_t *)((caddr_t)acep + ace_size);
770 zfs_copy_ace_2_oldace(umode_t obj_mode, zfs_acl_t *aclp, ace_t *acep,
771 zfs_oldace_t *z_acl, int aclcnt, size_t *size)
774 zfs_oldace_t *aceptr = z_acl;
776 for (i = 0; i != aclcnt; i++, aceptr++) {
777 aceptr->z_access_mask = acep[i].a_access_mask;
778 aceptr->z_type = acep[i].a_type;
779 aceptr->z_flags = acep[i].a_flags;
780 aceptr->z_fuid = acep[i].a_who;
782 * Make sure ACE is valid
784 if (zfs_ace_valid(obj_mode, aclp, aceptr->z_type,
785 aceptr->z_flags) != B_TRUE)
788 *size = (caddr_t)aceptr - (caddr_t)z_acl;
793 * convert old ACL format to new
796 zfs_acl_xform(znode_t *zp, zfs_acl_t *aclp, cred_t *cr)
798 zfs_oldace_t *oldaclp;
800 uint16_t type, iflags;
801 uint32_t access_mask;
804 zfs_acl_node_t *newaclnode;
806 ASSERT(aclp->z_version == ZFS_ACL_VERSION_INITIAL);
808 * First create the ACE in a contiguous piece of memory
809 * for zfs_copy_ace_2_fuid().
811 * We only convert an ACL once, so this won't happen
814 oldaclp = kmem_alloc(sizeof (zfs_oldace_t) * aclp->z_acl_count,
817 while ((cookie = zfs_acl_next_ace(aclp, cookie, &who,
818 &access_mask, &iflags, &type))) {
819 oldaclp[i].z_flags = iflags;
820 oldaclp[i].z_type = type;
821 oldaclp[i].z_fuid = who;
822 oldaclp[i++].z_access_mask = access_mask;
825 newaclnode = zfs_acl_node_alloc(aclp->z_acl_count *
826 sizeof (zfs_object_ace_t));
827 aclp->z_ops = &zfs_acl_fuid_ops;
828 VERIFY(zfs_copy_ace_2_fuid(ZTOZSB(zp), ZTOI(zp)->i_mode,
829 aclp, oldaclp, newaclnode->z_acldata, aclp->z_acl_count,
830 &newaclnode->z_size, NULL, cr) == 0);
831 newaclnode->z_ace_count = aclp->z_acl_count;
832 aclp->z_version = ZFS_ACL_VERSION;
833 kmem_free(oldaclp, aclp->z_acl_count * sizeof (zfs_oldace_t));
836 * Release all previous ACL nodes
839 zfs_acl_release_nodes(aclp);
841 list_insert_head(&aclp->z_acl, newaclnode);
843 aclp->z_acl_bytes = newaclnode->z_size;
844 aclp->z_acl_count = newaclnode->z_ace_count;
849 * Convert unix access mask to v4 access mask
852 zfs_unix_to_v4(uint32_t access_mask)
854 uint32_t new_mask = 0;
856 if (access_mask & S_IXOTH)
857 new_mask |= ACE_EXECUTE;
858 if (access_mask & S_IWOTH)
859 new_mask |= ACE_WRITE_DATA;
860 if (access_mask & S_IROTH)
861 new_mask |= ACE_READ_DATA;
866 zfs_set_ace(zfs_acl_t *aclp, void *acep, uint32_t access_mask,
867 uint16_t access_type, uint64_t fuid, uint16_t entry_type)
869 uint16_t type = entry_type & ACE_TYPE_FLAGS;
871 aclp->z_ops->ace_mask_set(acep, access_mask);
872 aclp->z_ops->ace_type_set(acep, access_type);
873 aclp->z_ops->ace_flags_set(acep, entry_type);
874 if ((type != ACE_OWNER && type != OWNING_GROUP &&
875 type != ACE_EVERYONE))
876 aclp->z_ops->ace_who_set(acep, fuid);
880 * Determine mode of file based on ACL.
881 * Also, create FUIDs for any User/Group ACEs
884 zfs_mode_compute(uint64_t fmode, zfs_acl_t *aclp,
885 uint64_t *pflags, uint64_t fuid, uint64_t fgid)
890 zfs_ace_hdr_t *acep = NULL;
892 uint16_t iflags, type;
893 uint32_t access_mask;
894 boolean_t an_exec_denied = B_FALSE;
896 mode = (fmode & (S_IFMT | S_ISUID | S_ISGID | S_ISVTX));
898 while ((acep = zfs_acl_next_ace(aclp, acep, &who,
899 &access_mask, &iflags, &type))) {
901 if (!zfs_acl_valid_ace_type(type, iflags))
904 entry_type = (iflags & ACE_TYPE_FLAGS);
907 * Skip over owner@, group@ or everyone@ inherit only ACEs
909 if ((iflags & ACE_INHERIT_ONLY_ACE) &&
910 (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
911 entry_type == OWNING_GROUP))
914 if (entry_type == ACE_OWNER || (entry_type == 0 &&
916 if ((access_mask & ACE_READ_DATA) &&
917 (!(seen & S_IRUSR))) {
923 if ((access_mask & ACE_WRITE_DATA) &&
924 (!(seen & S_IWUSR))) {
930 if ((access_mask & ACE_EXECUTE) &&
931 (!(seen & S_IXUSR))) {
937 } else if (entry_type == OWNING_GROUP ||
938 (entry_type == ACE_IDENTIFIER_GROUP && who == fgid)) {
939 if ((access_mask & ACE_READ_DATA) &&
940 (!(seen & S_IRGRP))) {
946 if ((access_mask & ACE_WRITE_DATA) &&
947 (!(seen & S_IWGRP))) {
953 if ((access_mask & ACE_EXECUTE) &&
954 (!(seen & S_IXGRP))) {
960 } else if (entry_type == ACE_EVERYONE) {
961 if ((access_mask & ACE_READ_DATA)) {
962 if (!(seen & S_IRUSR)) {
968 if (!(seen & S_IRGRP)) {
974 if (!(seen & S_IROTH)) {
981 if ((access_mask & ACE_WRITE_DATA)) {
982 if (!(seen & S_IWUSR)) {
988 if (!(seen & S_IWGRP)) {
994 if (!(seen & S_IWOTH)) {
1001 if ((access_mask & ACE_EXECUTE)) {
1002 if (!(seen & S_IXUSR)) {
1004 if (type == ALLOW) {
1008 if (!(seen & S_IXGRP)) {
1010 if (type == ALLOW) {
1014 if (!(seen & S_IXOTH)) {
1016 if (type == ALLOW) {
1023 * Only care if this IDENTIFIER_GROUP or
1024 * USER ACE denies execute access to someone,
1025 * mode is not affected
1027 if ((access_mask & ACE_EXECUTE) && type == DENY)
1028 an_exec_denied = B_TRUE;
1033 * Failure to allow is effectively a deny, so execute permission
1034 * is denied if it was never mentioned or if we explicitly
1035 * weren't allowed it.
1037 if (!an_exec_denied &&
1038 ((seen & ALL_MODE_EXECS) != ALL_MODE_EXECS ||
1039 (mode & ALL_MODE_EXECS) != ALL_MODE_EXECS))
1040 an_exec_denied = B_TRUE;
1043 *pflags &= ~ZFS_NO_EXECS_DENIED;
1045 *pflags |= ZFS_NO_EXECS_DENIED;
1051 * Read an external acl object. If the intent is to modify, always
1052 * create a new acl and leave any cached acl in place.
1055 zfs_acl_node_read(znode_t *zp, boolean_t have_lock, zfs_acl_t **aclpp,
1056 boolean_t will_modify)
1061 zfs_acl_node_t *aclnode;
1062 zfs_acl_phys_t znode_acl;
1065 boolean_t drop_lock = B_FALSE;
1067 ASSERT(MUTEX_HELD(&zp->z_acl_lock));
1069 if (zp->z_acl_cached && !will_modify) {
1070 *aclpp = zp->z_acl_cached;
1075 * close race where znode could be upgrade while trying to
1076 * read the znode attributes.
1078 * But this could only happen if the file isn't already an SA
1081 if (!zp->z_is_sa && !have_lock) {
1082 mutex_enter(&zp->z_lock);
1085 version = zfs_znode_acl_version(zp);
1087 if ((error = zfs_acl_znode_info(zp, &aclsize,
1088 &acl_count, &znode_acl)) != 0) {
1092 aclp = zfs_acl_alloc(version);
1094 aclp->z_acl_count = acl_count;
1095 aclp->z_acl_bytes = aclsize;
1097 aclnode = zfs_acl_node_alloc(aclsize);
1098 aclnode->z_ace_count = aclp->z_acl_count;
1099 aclnode->z_size = aclsize;
1102 if (znode_acl.z_acl_extern_obj) {
1103 error = dmu_read(ZTOZSB(zp)->z_os,
1104 znode_acl.z_acl_extern_obj, 0, aclnode->z_size,
1105 aclnode->z_acldata, DMU_READ_PREFETCH);
1107 bcopy(znode_acl.z_ace_data, aclnode->z_acldata,
1111 error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DACL_ACES(ZTOZSB(zp)),
1112 aclnode->z_acldata, aclnode->z_size);
1117 zfs_acl_node_free(aclnode);
1118 /* convert checksum errors into IO errors */
1119 if (error == ECKSUM)
1124 list_insert_head(&aclp->z_acl, aclnode);
1128 zp->z_acl_cached = aclp;
1131 mutex_exit(&zp->z_lock);
1137 zfs_acl_data_locator(void **dataptr, uint32_t *length, uint32_t buflen,
1138 boolean_t start, void *userdata)
1140 zfs_acl_locator_cb_t *cb = (zfs_acl_locator_cb_t *)userdata;
1143 cb->cb_acl_node = list_head(&cb->cb_aclp->z_acl);
1145 cb->cb_acl_node = list_next(&cb->cb_aclp->z_acl,
1148 *dataptr = cb->cb_acl_node->z_acldata;
1149 *length = cb->cb_acl_node->z_size;
1153 zfs_acl_chown_setattr(znode_t *zp)
1158 if (ZTOZSB(zp)->z_acl_type == ZFS_ACLTYPE_POSIXACL)
1161 ASSERT(MUTEX_HELD(&zp->z_lock));
1162 ASSERT(MUTEX_HELD(&zp->z_acl_lock));
1164 if ((error = zfs_acl_node_read(zp, B_TRUE, &aclp, B_FALSE)) == 0)
1165 zp->z_mode = zfs_mode_compute(zp->z_mode, aclp,
1166 &zp->z_pflags, zp->z_uid, zp->z_gid);
1171 acl_trivial_access_masks(mode_t mode, uint32_t *allow0, uint32_t *deny1,
1172 uint32_t *deny2, uint32_t *owner, uint32_t *group, uint32_t *everyone)
1174 *deny1 = *deny2 = *allow0 = *group = 0;
1176 if (!(mode & S_IRUSR) && (mode & (S_IRGRP|S_IROTH)))
1177 *deny1 |= ACE_READ_DATA;
1178 if (!(mode & S_IWUSR) && (mode & (S_IWGRP|S_IWOTH)))
1179 *deny1 |= ACE_WRITE_DATA;
1180 if (!(mode & S_IXUSR) && (mode & (S_IXGRP|S_IXOTH)))
1181 *deny1 |= ACE_EXECUTE;
1183 if (!(mode & S_IRGRP) && (mode & S_IROTH))
1184 *deny2 = ACE_READ_DATA;
1185 if (!(mode & S_IWGRP) && (mode & S_IWOTH))
1186 *deny2 |= ACE_WRITE_DATA;
1187 if (!(mode & S_IXGRP) && (mode & S_IXOTH))
1188 *deny2 |= ACE_EXECUTE;
1190 if ((mode & S_IRUSR) && (!(mode & S_IRGRP) && (mode & S_IROTH)))
1191 *allow0 |= ACE_READ_DATA;
1192 if ((mode & S_IWUSR) && (!(mode & S_IWGRP) && (mode & S_IWOTH)))
1193 *allow0 |= ACE_WRITE_DATA;
1194 if ((mode & S_IXUSR) && (!(mode & S_IXGRP) && (mode & S_IXOTH)))
1195 *allow0 |= ACE_EXECUTE;
1197 *owner = ACE_WRITE_ATTRIBUTES|ACE_WRITE_OWNER|ACE_WRITE_ACL|
1198 ACE_WRITE_NAMED_ATTRS|ACE_READ_ACL|ACE_READ_ATTRIBUTES|
1199 ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE;
1201 *owner |= ACE_READ_DATA;
1203 *owner |= ACE_WRITE_DATA|ACE_APPEND_DATA;
1205 *owner |= ACE_EXECUTE;
1207 *group = ACE_READ_ACL|ACE_READ_ATTRIBUTES| ACE_READ_NAMED_ATTRS|
1210 *group |= ACE_READ_DATA;
1212 *group |= ACE_WRITE_DATA|ACE_APPEND_DATA;
1214 *group |= ACE_EXECUTE;
1216 *everyone = ACE_READ_ACL|ACE_READ_ATTRIBUTES| ACE_READ_NAMED_ATTRS|
1219 *everyone |= ACE_READ_DATA;
1221 *everyone |= ACE_WRITE_DATA|ACE_APPEND_DATA;
1223 *everyone |= ACE_EXECUTE;
1228 * determine whether an ace_t acl is trivial
1230 * Trivialness implies that the acl is composed of only
1231 * owner, group, everyone entries. ACL can't
1232 * have read_acl denied, and write_owner/write_acl/write_attributes
1233 * can only be owner@ entry.
1236 ace_trivial_common(void *acep, int aclcnt,
1237 uint64_t (*walk)(void *, uint64_t, int aclcnt,
1238 uint16_t *, uint16_t *, uint32_t *))
1243 uint64_t cookie = 0;
1245 while ((cookie = walk(acep, cookie, aclcnt, &flags, &type, &mask))) {
1246 switch (flags & ACE_TYPE_FLAGS) {
1248 case ACE_GROUP|ACE_IDENTIFIER_GROUP:
1255 if (flags & (ACE_FILE_INHERIT_ACE|
1256 ACE_DIRECTORY_INHERIT_ACE|ACE_NO_PROPAGATE_INHERIT_ACE|
1257 ACE_INHERIT_ONLY_ACE))
1261 * Special check for some special bits
1263 * Don't allow anybody to deny reading basic
1264 * attributes or a files ACL.
1266 if ((mask & (ACE_READ_ACL|ACE_READ_ATTRIBUTES)) &&
1267 (type == ACE_ACCESS_DENIED_ACE_TYPE))
1271 * Delete permissions are never set by default
1273 if (mask & (ACE_DELETE|ACE_DELETE_CHILD))
1276 * only allow owner@ to have
1277 * write_acl/write_owner/write_attributes/write_xattr/
1279 if (type == ACE_ACCESS_ALLOWED_ACE_TYPE &&
1280 (!(flags & ACE_OWNER) && (mask &
1281 (ACE_WRITE_OWNER|ACE_WRITE_ACL| ACE_WRITE_ATTRIBUTES|
1282 ACE_WRITE_NAMED_ATTRS))))
1291 * common code for setting ACLs.
1293 * This function is called from zfs_mode_update, zfs_perm_init, and zfs_setacl.
1294 * zfs_setacl passes a non-NULL inherit pointer (ihp) to indicate that it's
1295 * already checked the acl and knows whether to inherit.
1298 zfs_aclset_common(znode_t *zp, zfs_acl_t *aclp, cred_t *cr, dmu_tx_t *tx)
1301 zfs_sb_t *zsb = ZTOZSB(zp);
1302 dmu_object_type_t otype;
1303 zfs_acl_locator_cb_t locate = { 0 };
1305 sa_bulk_attr_t bulk[5];
1311 mode = zfs_mode_compute(mode, aclp, &zp->z_pflags,
1312 zp->z_uid, zp->z_gid);
1315 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zsb), NULL,
1316 &mode, sizeof (mode));
1317 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zsb), NULL,
1318 &zp->z_pflags, sizeof (zp->z_pflags));
1319 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zsb), NULL,
1320 &ctime, sizeof (ctime));
1322 if (zp->z_acl_cached) {
1323 zfs_acl_free(zp->z_acl_cached);
1324 zp->z_acl_cached = NULL;
1330 if (!zsb->z_use_fuids) {
1331 otype = DMU_OT_OLDACL;
1333 if ((aclp->z_version == ZFS_ACL_VERSION_INITIAL) &&
1334 (zsb->z_version >= ZPL_VERSION_FUID))
1335 zfs_acl_xform(zp, aclp, cr);
1336 ASSERT(aclp->z_version >= ZFS_ACL_VERSION_FUID);
1341 * Arrgh, we have to handle old on disk format
1342 * as well as newer (preferred) SA format.
1345 if (zp->z_is_sa) { /* the easy case, just update the ACL attribute */
1346 locate.cb_aclp = aclp;
1347 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_ACES(zsb),
1348 zfs_acl_data_locator, &locate, aclp->z_acl_bytes);
1349 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_COUNT(zsb),
1350 NULL, &aclp->z_acl_count, sizeof (uint64_t));
1351 } else { /* Painful legacy way */
1352 zfs_acl_node_t *aclnode;
1354 zfs_acl_phys_t acl_phys;
1357 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zsb),
1358 &acl_phys, sizeof (acl_phys))) != 0)
1361 aoid = acl_phys.z_acl_extern_obj;
1363 if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
1365 * If ACL was previously external and we are now
1366 * converting to new ACL format then release old
1367 * ACL object and create a new one.
1370 aclp->z_version != acl_phys.z_acl_version) {
1371 error = dmu_object_free(zsb->z_os, aoid, tx);
1377 aoid = dmu_object_alloc(zsb->z_os,
1378 otype, aclp->z_acl_bytes,
1379 otype == DMU_OT_ACL ?
1380 DMU_OT_SYSACL : DMU_OT_NONE,
1381 otype == DMU_OT_ACL ?
1382 DN_MAX_BONUSLEN : 0, tx);
1384 (void) dmu_object_set_blocksize(zsb->z_os,
1385 aoid, aclp->z_acl_bytes, 0, tx);
1387 acl_phys.z_acl_extern_obj = aoid;
1388 for (aclnode = list_head(&aclp->z_acl); aclnode;
1389 aclnode = list_next(&aclp->z_acl, aclnode)) {
1390 if (aclnode->z_ace_count == 0)
1392 dmu_write(zsb->z_os, aoid, off,
1393 aclnode->z_size, aclnode->z_acldata, tx);
1394 off += aclnode->z_size;
1397 void *start = acl_phys.z_ace_data;
1399 * Migrating back embedded?
1401 if (acl_phys.z_acl_extern_obj) {
1402 error = dmu_object_free(zsb->z_os,
1403 acl_phys.z_acl_extern_obj, tx);
1406 acl_phys.z_acl_extern_obj = 0;
1409 for (aclnode = list_head(&aclp->z_acl); aclnode;
1410 aclnode = list_next(&aclp->z_acl, aclnode)) {
1411 if (aclnode->z_ace_count == 0)
1413 bcopy(aclnode->z_acldata, start,
1415 start = (caddr_t)start + aclnode->z_size;
1419 * If Old version then swap count/bytes to match old
1420 * layout of znode_acl_phys_t.
1422 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
1423 acl_phys.z_acl_size = aclp->z_acl_count;
1424 acl_phys.z_acl_count = aclp->z_acl_bytes;
1426 acl_phys.z_acl_size = aclp->z_acl_bytes;
1427 acl_phys.z_acl_count = aclp->z_acl_count;
1429 acl_phys.z_acl_version = aclp->z_version;
1431 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zsb), NULL,
1432 &acl_phys, sizeof (acl_phys));
1436 * Replace ACL wide bits, but first clear them.
1438 zp->z_pflags &= ~ZFS_ACL_WIDE_FLAGS;
1440 zp->z_pflags |= aclp->z_hints;
1442 if (ace_trivial_common(aclp, 0, zfs_ace_walk) == 0)
1443 zp->z_pflags |= ZFS_ACL_TRIVIAL;
1445 zfs_tstamp_update_setup(zp, STATE_CHANGED, NULL, ctime, B_TRUE);
1446 return (sa_bulk_update(zp->z_sa_hdl, bulk, count, tx));
1450 zfs_acl_chmod(zfs_sb_t *zsb, uint64_t mode, zfs_acl_t *aclp)
1454 int new_count, new_bytes;
1457 uint16_t iflags, type;
1458 uint32_t access_mask;
1459 zfs_acl_node_t *newnode;
1460 size_t abstract_size = aclp->z_ops->ace_abstract_size();
1462 uint32_t owner, group, everyone;
1463 uint32_t deny1, deny2, allow0;
1465 new_count = new_bytes = 0;
1467 acl_trivial_access_masks((mode_t)mode, &allow0, &deny1, &deny2,
1468 &owner, &group, &everyone);
1470 newnode = zfs_acl_node_alloc((abstract_size * 6) + aclp->z_acl_bytes);
1472 zacep = newnode->z_acldata;
1474 zfs_set_ace(aclp, zacep, allow0, ALLOW, -1, ACE_OWNER);
1475 zacep = (void *)((uintptr_t)zacep + abstract_size);
1477 new_bytes += abstract_size;
1479 zfs_set_ace(aclp, zacep, deny1, DENY, -1, ACE_OWNER);
1480 zacep = (void *)((uintptr_t)zacep + abstract_size);
1482 new_bytes += abstract_size;
1485 zfs_set_ace(aclp, zacep, deny2, DENY, -1, OWNING_GROUP);
1486 zacep = (void *)((uintptr_t)zacep + abstract_size);
1488 new_bytes += abstract_size;
1491 while ((acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
1493 uint16_t inherit_flags;
1495 entry_type = (iflags & ACE_TYPE_FLAGS);
1496 inherit_flags = (iflags & ALL_INHERIT);
1498 if ((entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
1499 (entry_type == OWNING_GROUP)) &&
1500 ((inherit_flags & ACE_INHERIT_ONLY_ACE) == 0)) {
1504 if ((type != ALLOW && type != DENY) ||
1505 (inherit_flags & ACE_INHERIT_ONLY_ACE)) {
1507 aclp->z_hints |= ZFS_INHERIT_ACE;
1509 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1510 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1511 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1512 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
1513 aclp->z_hints |= ZFS_ACL_OBJ_ACE;
1519 * Limit permissions to be no greater than
1522 if (zsb->z_acl_inherit == ZFS_ACL_RESTRICTED) {
1523 if (!(mode & S_IRGRP))
1524 access_mask &= ~ACE_READ_DATA;
1525 if (!(mode & S_IWGRP))
1527 ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
1528 if (!(mode & S_IXGRP))
1529 access_mask &= ~ACE_EXECUTE;
1531 ~(ACE_WRITE_OWNER|ACE_WRITE_ACL|
1532 ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS);
1535 zfs_set_ace(aclp, zacep, access_mask, type, who, iflags);
1536 ace_size = aclp->z_ops->ace_size(acep);
1537 zacep = (void *)((uintptr_t)zacep + ace_size);
1539 new_bytes += ace_size;
1541 zfs_set_ace(aclp, zacep, owner, 0, -1, ACE_OWNER);
1542 zacep = (void *)((uintptr_t)zacep + abstract_size);
1543 zfs_set_ace(aclp, zacep, group, 0, -1, OWNING_GROUP);
1544 zacep = (void *)((uintptr_t)zacep + abstract_size);
1545 zfs_set_ace(aclp, zacep, everyone, 0, -1, ACE_EVERYONE);
1548 new_bytes += abstract_size * 3;
1549 zfs_acl_release_nodes(aclp);
1550 aclp->z_acl_count = new_count;
1551 aclp->z_acl_bytes = new_bytes;
1552 newnode->z_ace_count = new_count;
1553 newnode->z_size = new_bytes;
1554 list_insert_tail(&aclp->z_acl, newnode);
1558 zfs_acl_chmod_setattr(znode_t *zp, zfs_acl_t **aclp, uint64_t mode)
1560 mutex_enter(&zp->z_acl_lock);
1561 mutex_enter(&zp->z_lock);
1562 *aclp = zfs_acl_alloc(zfs_acl_version_zp(zp));
1563 (*aclp)->z_hints = zp->z_pflags & V4_ACL_WIDE_FLAGS;
1564 zfs_acl_chmod(ZTOZSB(zp), mode, *aclp);
1565 mutex_exit(&zp->z_lock);
1566 mutex_exit(&zp->z_acl_lock);
1571 * strip off write_owner and write_acl
1574 zfs_restricted_update(zfs_sb_t *zsb, zfs_acl_t *aclp, void *acep)
1576 uint32_t mask = aclp->z_ops->ace_mask_get(acep);
1578 if ((zsb->z_acl_inherit == ZFS_ACL_RESTRICTED) &&
1579 (aclp->z_ops->ace_type_get(acep) == ALLOW)) {
1580 mask &= ~RESTRICTED_CLEAR;
1581 aclp->z_ops->ace_mask_set(acep, mask);
1586 * Should ACE be inherited?
1589 zfs_ace_can_use(umode_t obj_mode, uint16_t acep_flags)
1591 int iflags = (acep_flags & 0xf);
1593 if (S_ISDIR(obj_mode) && (iflags & ACE_DIRECTORY_INHERIT_ACE))
1595 else if (iflags & ACE_FILE_INHERIT_ACE)
1596 return (!(S_ISDIR(obj_mode) &&
1597 (iflags & ACE_NO_PROPAGATE_INHERIT_ACE)));
1602 * inherit inheritable ACEs from parent
1605 zfs_acl_inherit(zfs_sb_t *zsb, umode_t obj_mode, zfs_acl_t *paclp,
1606 uint64_t mode, boolean_t *need_chmod)
1610 zfs_acl_node_t *aclnode;
1611 zfs_acl_t *aclp = NULL;
1613 uint32_t access_mask;
1614 uint16_t iflags, newflags, type;
1616 void *data1, *data2;
1617 size_t data1sz, data2sz;
1618 boolean_t vdir = S_ISDIR(obj_mode);
1619 boolean_t vreg = S_ISREG(obj_mode);
1620 boolean_t passthrough, passthrough_x, noallow;
1623 zsb->z_acl_inherit == ZFS_ACL_PASSTHROUGH_X;
1624 passthrough = passthrough_x ||
1625 zsb->z_acl_inherit == ZFS_ACL_PASSTHROUGH;
1627 zsb->z_acl_inherit == ZFS_ACL_NOALLOW;
1629 *need_chmod = B_TRUE;
1631 aclp = zfs_acl_alloc(paclp->z_version);
1632 if (zsb->z_acl_inherit == ZFS_ACL_DISCARD || S_ISLNK(obj_mode))
1634 while ((pacep = zfs_acl_next_ace(paclp, pacep, &who,
1635 &access_mask, &iflags, &type))) {
1638 * don't inherit bogus ACEs
1640 if (!zfs_acl_valid_ace_type(type, iflags))
1643 if (noallow && type == ALLOW)
1646 ace_size = aclp->z_ops->ace_size(pacep);
1648 if (!zfs_ace_can_use(obj_mode, iflags))
1652 * If owner@, group@, or everyone@ inheritable
1653 * then zfs_acl_chmod() isn't needed.
1656 ((iflags & (ACE_OWNER|ACE_EVERYONE)) ||
1657 ((iflags & OWNING_GROUP) ==
1658 OWNING_GROUP)) && (vreg || (vdir && (iflags &
1659 ACE_DIRECTORY_INHERIT_ACE)))) {
1660 *need_chmod = B_FALSE;
1663 if (!vdir && passthrough_x &&
1664 ((mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0)) {
1665 access_mask &= ~ACE_EXECUTE;
1668 aclnode = zfs_acl_node_alloc(ace_size);
1669 list_insert_tail(&aclp->z_acl, aclnode);
1670 acep = aclnode->z_acldata;
1672 zfs_set_ace(aclp, acep, access_mask, type,
1673 who, iflags|ACE_INHERITED_ACE);
1676 * Copy special opaque data if any
1678 if ((data1sz = paclp->z_ops->ace_data(pacep, &data1)) != 0) {
1679 VERIFY((data2sz = aclp->z_ops->ace_data(acep,
1680 &data2)) == data1sz);
1681 bcopy(data1, data2, data2sz);
1684 aclp->z_acl_count++;
1685 aclnode->z_ace_count++;
1686 aclp->z_acl_bytes += aclnode->z_size;
1687 newflags = aclp->z_ops->ace_flags_get(acep);
1690 aclp->z_hints |= ZFS_INHERIT_ACE;
1692 if ((iflags & ACE_NO_PROPAGATE_INHERIT_ACE) || !vdir) {
1693 newflags &= ~ALL_INHERIT;
1694 aclp->z_ops->ace_flags_set(acep,
1695 newflags|ACE_INHERITED_ACE);
1696 zfs_restricted_update(zsb, aclp, acep);
1703 * If only FILE_INHERIT is set then turn on
1706 if ((iflags & (ACE_FILE_INHERIT_ACE |
1707 ACE_DIRECTORY_INHERIT_ACE)) == ACE_FILE_INHERIT_ACE) {
1708 newflags |= ACE_INHERIT_ONLY_ACE;
1709 aclp->z_ops->ace_flags_set(acep,
1710 newflags|ACE_INHERITED_ACE);
1712 newflags &= ~ACE_INHERIT_ONLY_ACE;
1713 aclp->z_ops->ace_flags_set(acep,
1714 newflags|ACE_INHERITED_ACE);
1721 * Create file system object initial permissions
1722 * including inheritable ACEs.
1725 zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
1726 vsecattr_t *vsecp, zfs_acl_ids_t *acl_ids)
1729 zfs_sb_t *zsb = ZTOZSB(dzp);
1733 #endif /* HAVE_KSID */
1734 boolean_t need_chmod = B_TRUE;
1735 boolean_t inherited = B_FALSE;
1737 bzero(acl_ids, sizeof (zfs_acl_ids_t));
1738 acl_ids->z_mode = vap->va_mode;
1741 if ((error = zfs_vsec_2_aclp(zsb, vap->va_mode, vsecp,
1742 cr, &acl_ids->z_fuidp, &acl_ids->z_aclp)) != 0)
1745 acl_ids->z_fuid = vap->va_uid;
1746 acl_ids->z_fgid = vap->va_gid;
1749 * Determine uid and gid.
1751 if ((flag & IS_ROOT_NODE) || zsb->z_replay ||
1752 ((flag & IS_XATTR) && (S_ISDIR(vap->va_mode)))) {
1753 acl_ids->z_fuid = zfs_fuid_create(zsb, (uint64_t)vap->va_uid,
1754 cr, ZFS_OWNER, &acl_ids->z_fuidp);
1755 acl_ids->z_fgid = zfs_fuid_create(zsb, (uint64_t)vap->va_gid,
1756 cr, ZFS_GROUP, &acl_ids->z_fuidp);
1759 acl_ids->z_fuid = zfs_fuid_create_cred(zsb, ZFS_OWNER,
1760 cr, &acl_ids->z_fuidp);
1761 acl_ids->z_fgid = 0;
1762 if (vap->va_mask & AT_GID) {
1763 acl_ids->z_fgid = zfs_fuid_create(zsb,
1764 (uint64_t)vap->va_gid,
1765 cr, ZFS_GROUP, &acl_ids->z_fuidp);
1767 if (acl_ids->z_fgid != dzp->z_gid &&
1768 !groupmember(vap->va_gid, cr) &&
1769 secpolicy_vnode_create_gid(cr) != 0)
1770 acl_ids->z_fgid = 0;
1772 if (acl_ids->z_fgid == 0) {
1773 if (dzp->z_mode & S_ISGID) {
1777 acl_ids->z_fgid = dzp->z_gid;
1778 gid = zfs_fuid_map_id(zsb, acl_ids->z_fgid,
1781 if (zsb->z_use_fuids &&
1782 IS_EPHEMERAL(acl_ids->z_fgid)) {
1783 domain = zfs_fuid_idx_domain(
1785 FUID_INDEX(acl_ids->z_fgid));
1786 rid = FUID_RID(acl_ids->z_fgid);
1787 zfs_fuid_node_add(&acl_ids->z_fuidp,
1789 FUID_INDEX(acl_ids->z_fgid),
1790 acl_ids->z_fgid, ZFS_GROUP);
1793 acl_ids->z_fgid = zfs_fuid_create_cred(zsb,
1794 ZFS_GROUP, cr, &acl_ids->z_fuidp);
1799 #endif /* HAVE_KSID */
1802 * If we're creating a directory, and the parent directory has the
1803 * set-GID bit set, set in on the new directory.
1804 * Otherwise, if the user is neither privileged nor a member of the
1805 * file's new group, clear the file's set-GID bit.
1808 if (!(flag & IS_ROOT_NODE) && (dzp->z_mode & S_ISGID) &&
1809 (S_ISDIR(vap->va_mode))) {
1810 acl_ids->z_mode |= S_ISGID;
1812 if ((acl_ids->z_mode & S_ISGID) &&
1813 secpolicy_vnode_setids_setgids(cr, gid) != 0)
1814 acl_ids->z_mode &= ~S_ISGID;
1817 if (acl_ids->z_aclp == NULL) {
1818 mutex_enter(&dzp->z_acl_lock);
1819 mutex_enter(&dzp->z_lock);
1820 if (!(flag & IS_ROOT_NODE) && (S_ISDIR(ZTOI(dzp)->i_mode) &&
1821 (dzp->z_pflags & ZFS_INHERIT_ACE)) &&
1822 !(dzp->z_pflags & ZFS_XATTR)) {
1823 VERIFY(0 == zfs_acl_node_read(dzp, B_TRUE,
1825 acl_ids->z_aclp = zfs_acl_inherit(zsb,
1826 vap->va_mode, paclp, acl_ids->z_mode, &need_chmod);
1830 zfs_acl_alloc(zfs_acl_version_zp(dzp));
1831 acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL;
1833 mutex_exit(&dzp->z_lock);
1834 mutex_exit(&dzp->z_acl_lock);
1836 acl_ids->z_aclp->z_hints |= S_ISDIR(vap->va_mode) ?
1837 ZFS_ACL_AUTO_INHERIT : 0;
1838 zfs_acl_chmod(zsb, acl_ids->z_mode, acl_ids->z_aclp);
1842 if (inherited || vsecp) {
1843 acl_ids->z_mode = zfs_mode_compute(acl_ids->z_mode,
1844 acl_ids->z_aclp, &acl_ids->z_aclp->z_hints,
1845 acl_ids->z_fuid, acl_ids->z_fgid);
1846 if (ace_trivial_common(acl_ids->z_aclp, 0, zfs_ace_walk) == 0)
1847 acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL;
1854 * Free ACL and fuid_infop, but not the acl_ids structure
1857 zfs_acl_ids_free(zfs_acl_ids_t *acl_ids)
1859 if (acl_ids->z_aclp)
1860 zfs_acl_free(acl_ids->z_aclp);
1861 if (acl_ids->z_fuidp)
1862 zfs_fuid_info_free(acl_ids->z_fuidp);
1863 acl_ids->z_aclp = NULL;
1864 acl_ids->z_fuidp = NULL;
1868 zfs_acl_ids_overquota(zfs_sb_t *zsb, zfs_acl_ids_t *acl_ids)
1870 return (zfs_fuid_overquota(zsb, B_FALSE, acl_ids->z_fuid) ||
1871 zfs_fuid_overquota(zsb, B_TRUE, acl_ids->z_fgid));
1875 * Retrieve a files ACL
1878 zfs_getacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
1886 mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT |
1887 VSA_ACE_ACLFLAGS | VSA_ACE_ALLTYPES);
1892 if ((error = zfs_zaccess(zp, ACE_READ_ACL, 0, skipaclchk, cr)))
1895 mutex_enter(&zp->z_acl_lock);
1897 error = zfs_acl_node_read(zp, B_FALSE, &aclp, B_FALSE);
1899 mutex_exit(&zp->z_acl_lock);
1904 * Scan ACL to determine number of ACEs
1906 if ((zp->z_pflags & ZFS_ACL_OBJ_ACE) && !(mask & VSA_ACE_ALLTYPES)) {
1909 uint32_t access_mask;
1910 uint16_t type, iflags;
1912 while ((zacep = zfs_acl_next_ace(aclp, zacep,
1913 &who, &access_mask, &iflags, &type))) {
1915 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
1916 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
1917 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
1918 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
1925 vsecp->vsa_aclcnt = count;
1927 count = (int)aclp->z_acl_count;
1929 if (mask & VSA_ACECNT) {
1930 vsecp->vsa_aclcnt = count;
1933 if (mask & VSA_ACE) {
1936 aclsz = count * sizeof (ace_t) +
1937 sizeof (ace_object_t) * largeace;
1939 vsecp->vsa_aclentp = kmem_alloc(aclsz, KM_SLEEP);
1940 vsecp->vsa_aclentsz = aclsz;
1942 if (aclp->z_version == ZFS_ACL_VERSION_FUID)
1943 zfs_copy_fuid_2_ace(ZTOZSB(zp), aclp, cr,
1944 vsecp->vsa_aclentp, !(mask & VSA_ACE_ALLTYPES));
1946 zfs_acl_node_t *aclnode;
1947 void *start = vsecp->vsa_aclentp;
1949 for (aclnode = list_head(&aclp->z_acl); aclnode;
1950 aclnode = list_next(&aclp->z_acl, aclnode)) {
1951 bcopy(aclnode->z_acldata, start,
1953 start = (caddr_t)start + aclnode->z_size;
1955 ASSERT((caddr_t)start - (caddr_t)vsecp->vsa_aclentp ==
1959 if (mask & VSA_ACE_ACLFLAGS) {
1960 vsecp->vsa_aclflags = 0;
1961 if (zp->z_pflags & ZFS_ACL_DEFAULTED)
1962 vsecp->vsa_aclflags |= ACL_DEFAULTED;
1963 if (zp->z_pflags & ZFS_ACL_PROTECTED)
1964 vsecp->vsa_aclflags |= ACL_PROTECTED;
1965 if (zp->z_pflags & ZFS_ACL_AUTO_INHERIT)
1966 vsecp->vsa_aclflags |= ACL_AUTO_INHERIT;
1969 mutex_exit(&zp->z_acl_lock);
1975 zfs_vsec_2_aclp(zfs_sb_t *zsb, umode_t obj_mode,
1976 vsecattr_t *vsecp, cred_t *cr, zfs_fuid_info_t **fuidp, zfs_acl_t **zaclp)
1979 zfs_acl_node_t *aclnode;
1980 int aclcnt = vsecp->vsa_aclcnt;
1983 if (vsecp->vsa_aclcnt > MAX_ACL_ENTRIES || vsecp->vsa_aclcnt <= 0)
1986 aclp = zfs_acl_alloc(zfs_acl_version(zsb->z_version));
1989 aclnode = zfs_acl_node_alloc(aclcnt * sizeof (zfs_object_ace_t));
1990 if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
1991 if ((error = zfs_copy_ace_2_oldace(obj_mode, aclp,
1992 (ace_t *)vsecp->vsa_aclentp, aclnode->z_acldata,
1993 aclcnt, &aclnode->z_size)) != 0) {
1995 zfs_acl_node_free(aclnode);
1999 if ((error = zfs_copy_ace_2_fuid(zsb, obj_mode, aclp,
2000 vsecp->vsa_aclentp, aclnode->z_acldata, aclcnt,
2001 &aclnode->z_size, fuidp, cr)) != 0) {
2003 zfs_acl_node_free(aclnode);
2007 aclp->z_acl_bytes = aclnode->z_size;
2008 aclnode->z_ace_count = aclcnt;
2009 aclp->z_acl_count = aclcnt;
2010 list_insert_head(&aclp->z_acl, aclnode);
2013 * If flags are being set then add them to z_hints
2015 if (vsecp->vsa_mask & VSA_ACE_ACLFLAGS) {
2016 if (vsecp->vsa_aclflags & ACL_PROTECTED)
2017 aclp->z_hints |= ZFS_ACL_PROTECTED;
2018 if (vsecp->vsa_aclflags & ACL_DEFAULTED)
2019 aclp->z_hints |= ZFS_ACL_DEFAULTED;
2020 if (vsecp->vsa_aclflags & ACL_AUTO_INHERIT)
2021 aclp->z_hints |= ZFS_ACL_AUTO_INHERIT;
2033 zfs_setacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
2035 zfs_sb_t *zsb = ZTOZSB(zp);
2036 zilog_t *zilog = zsb->z_log;
2037 ulong_t mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT);
2041 zfs_fuid_info_t *fuidp = NULL;
2042 boolean_t fuid_dirtied;
2048 if (zp->z_pflags & ZFS_IMMUTABLE)
2051 if ((error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr)))
2054 error = zfs_vsec_2_aclp(zsb, ZTOI(zp)->i_mode, vsecp, cr, &fuidp,
2060 * If ACL wide flags aren't being set then preserve any
2063 if (!(vsecp->vsa_mask & VSA_ACE_ACLFLAGS)) {
2065 (zp->z_pflags & V4_ACL_WIDE_FLAGS);
2068 mutex_enter(&zp->z_acl_lock);
2069 mutex_enter(&zp->z_lock);
2071 tx = dmu_tx_create(zsb->z_os);
2073 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
2075 fuid_dirtied = zsb->z_fuid_dirty;
2077 zfs_fuid_txhold(zsb, tx);
2080 * If old version and ACL won't fit in bonus and we aren't
2081 * upgrading then take out necessary DMU holds
2084 if ((acl_obj = zfs_external_acl(zp)) != 0) {
2085 if (zsb->z_version >= ZPL_VERSION_FUID &&
2086 zfs_znode_acl_version(zp) <= ZFS_ACL_VERSION_INITIAL) {
2087 dmu_tx_hold_free(tx, acl_obj, 0,
2089 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
2092 dmu_tx_hold_write(tx, acl_obj, 0, aclp->z_acl_bytes);
2094 } else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) {
2095 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, aclp->z_acl_bytes);
2098 zfs_sa_upgrade_txholds(tx, zp);
2099 error = dmu_tx_assign(tx, TXG_NOWAIT);
2101 mutex_exit(&zp->z_acl_lock);
2102 mutex_exit(&zp->z_lock);
2104 if (error == ERESTART) {
2114 error = zfs_aclset_common(zp, aclp, cr, tx);
2116 ASSERT(zp->z_acl_cached == NULL);
2117 zp->z_acl_cached = aclp;
2120 zfs_fuid_sync(zsb, tx);
2122 zfs_log_acl(zilog, tx, zp, vsecp, fuidp);
2125 zfs_fuid_info_free(fuidp);
2128 mutex_exit(&zp->z_lock);
2129 mutex_exit(&zp->z_acl_lock);
2135 * Check accesses of interest (AoI) against attributes of the dataset
2136 * such as read-only. Returns zero if no AoI conflict with dataset
2137 * attributes, otherwise an appropriate errno is returned.
2140 zfs_zaccess_dataset_check(znode_t *zp, uint32_t v4_mode)
2142 if ((v4_mode & WRITE_MASK) && (zfs_is_readonly(ZTOZSB(zp))) &&
2143 (!S_ISDEV(ZTOI(zp)->i_mode) ||
2144 (S_ISDEV(ZTOI(zp)->i_mode) && (v4_mode & WRITE_MASK_ATTRS)))) {
2149 * Only check for READONLY on non-directories.
2151 if ((v4_mode & WRITE_MASK_DATA) &&
2152 ((!S_ISDIR(ZTOI(zp)->i_mode) &&
2153 (zp->z_pflags & (ZFS_READONLY | ZFS_IMMUTABLE))) ||
2154 (S_ISDIR(ZTOI(zp)->i_mode) &&
2155 (zp->z_pflags & ZFS_IMMUTABLE)))) {
2159 if ((v4_mode & (ACE_DELETE | ACE_DELETE_CHILD)) &&
2160 (zp->z_pflags & ZFS_NOUNLINK)) {
2164 if (((v4_mode & (ACE_READ_DATA|ACE_EXECUTE)) &&
2165 (zp->z_pflags & ZFS_AV_QUARANTINED))) {
2173 * The primary usage of this function is to loop through all of the
2174 * ACEs in the znode, determining what accesses of interest (AoI) to
2175 * the caller are allowed or denied. The AoI are expressed as bits in
2176 * the working_mode parameter. As each ACE is processed, bits covered
2177 * by that ACE are removed from the working_mode. This removal
2178 * facilitates two things. The first is that when the working mode is
2179 * empty (= 0), we know we've looked at all the AoI. The second is
2180 * that the ACE interpretation rules don't allow a later ACE to undo
2181 * something granted or denied by an earlier ACE. Removing the
2182 * discovered access or denial enforces this rule. At the end of
2183 * processing the ACEs, all AoI that were found to be denied are
2184 * placed into the working_mode, giving the caller a mask of denied
2185 * accesses. Returns:
2186 * 0 if all AoI granted
2187 * EACCESS if the denied mask is non-zero
2188 * other error if abnormal failure (e.g., IO error)
2190 * A secondary usage of the function is to determine if any of the
2191 * AoI are granted. If an ACE grants any access in
2192 * the working_mode, we immediately short circuit out of the function.
2193 * This mode is chosen by setting anyaccess to B_TRUE. The
2194 * working_mode is not a denied access mask upon exit if the function
2195 * is used in this manner.
2198 zfs_zaccess_aces_check(znode_t *zp, uint32_t *working_mode,
2199 boolean_t anyaccess, cred_t *cr)
2201 zfs_sb_t *zsb = ZTOZSB(zp);
2204 uid_t uid = crgetuid(cr);
2206 uint16_t type, iflags;
2207 uint16_t entry_type;
2208 uint32_t access_mask;
2209 uint32_t deny_mask = 0;
2210 zfs_ace_hdr_t *acep = NULL;
2215 zfs_fuid_map_ids(zp, cr, &fowner, &gowner);
2217 mutex_enter(&zp->z_acl_lock);
2219 error = zfs_acl_node_read(zp, B_FALSE, &aclp, B_FALSE);
2221 mutex_exit(&zp->z_acl_lock);
2225 ASSERT(zp->z_acl_cached);
2227 while ((acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
2229 uint32_t mask_matched;
2231 if (!zfs_acl_valid_ace_type(type, iflags))
2234 if (S_ISDIR(ZTOI(zp)->i_mode) &&
2235 (iflags & ACE_INHERIT_ONLY_ACE))
2238 /* Skip ACE if it does not affect any AoI */
2239 mask_matched = (access_mask & *working_mode);
2243 entry_type = (iflags & ACE_TYPE_FLAGS);
2247 switch (entry_type) {
2255 case ACE_IDENTIFIER_GROUP:
2256 checkit = zfs_groupmember(zsb, who, cr);
2264 if (entry_type == 0) {
2267 newid = zfs_fuid_map_id(zsb, who, cr,
2269 if (newid != IDMAP_WK_CREATOR_OWNER_UID &&
2274 mutex_exit(&zp->z_acl_lock);
2281 DTRACE_PROBE3(zfs__ace__denies,
2283 zfs_ace_hdr_t *, acep,
2284 uint32_t, mask_matched);
2285 deny_mask |= mask_matched;
2287 DTRACE_PROBE3(zfs__ace__allows,
2289 zfs_ace_hdr_t *, acep,
2290 uint32_t, mask_matched);
2292 mutex_exit(&zp->z_acl_lock);
2296 *working_mode &= ~mask_matched;
2300 if (*working_mode == 0)
2304 mutex_exit(&zp->z_acl_lock);
2306 /* Put the found 'denies' back on the working mode */
2308 *working_mode |= deny_mask;
2310 } else if (*working_mode) {
2318 * Return true if any access whatsoever granted, we don't actually
2319 * care what access is granted.
2322 zfs_has_access(znode_t *zp, cred_t *cr)
2324 uint32_t have = ACE_ALL_PERMS;
2326 if (zfs_zaccess_aces_check(zp, &have, B_TRUE, cr) != 0) {
2329 owner = zfs_fuid_map_id(ZTOZSB(zp), zp->z_uid, cr, ZFS_OWNER);
2330 return (secpolicy_vnode_any_access(cr, ZTOI(zp), owner) == 0);
2336 zfs_zaccess_common(znode_t *zp, uint32_t v4_mode, uint32_t *working_mode,
2337 boolean_t *check_privs, boolean_t skipaclchk, cred_t *cr)
2339 zfs_sb_t *zsb = ZTOZSB(zp);
2342 *working_mode = v4_mode;
2343 *check_privs = B_TRUE;
2346 * Short circuit empty requests
2348 if (v4_mode == 0 || zsb->z_replay) {
2353 if ((err = zfs_zaccess_dataset_check(zp, v4_mode)) != 0) {
2354 *check_privs = B_FALSE;
2359 * The caller requested that the ACL check be skipped. This
2360 * would only happen if the caller checked VOP_ACCESS() with a
2361 * 32 bit ACE mask and already had the appropriate permissions.
2368 return (zfs_zaccess_aces_check(zp, working_mode, B_FALSE, cr));
2372 zfs_zaccess_append(znode_t *zp, uint32_t *working_mode, boolean_t *check_privs,
2375 if (*working_mode != ACE_WRITE_DATA)
2378 return (zfs_zaccess_common(zp, ACE_APPEND_DATA, working_mode,
2379 check_privs, B_FALSE, cr));
2383 zfs_fastaccesschk_execute(znode_t *zdp, cred_t *cr)
2385 boolean_t owner = B_FALSE;
2386 boolean_t groupmbr = B_FALSE;
2388 uid_t uid = crgetuid(cr);
2391 if (zdp->z_pflags & ZFS_AV_QUARANTINED)
2394 is_attr = ((zdp->z_pflags & ZFS_XATTR) &&
2395 (S_ISDIR(ZTOI(zdp)->i_mode)));
2400 mutex_enter(&zdp->z_acl_lock);
2402 if (zdp->z_pflags & ZFS_NO_EXECS_DENIED) {
2403 mutex_exit(&zdp->z_acl_lock);
2407 if (FUID_INDEX(zdp->z_uid) != 0 || FUID_INDEX(zdp->z_gid) != 0) {
2408 mutex_exit(&zdp->z_acl_lock);
2412 if (uid == zdp->z_uid) {
2414 if (zdp->z_mode & S_IXUSR) {
2415 mutex_exit(&zdp->z_acl_lock);
2418 mutex_exit(&zdp->z_acl_lock);
2422 if (groupmember(zdp->z_gid, cr)) {
2424 if (zdp->z_mode & S_IXGRP) {
2425 mutex_exit(&zdp->z_acl_lock);
2428 mutex_exit(&zdp->z_acl_lock);
2432 if (!owner && !groupmbr) {
2433 if (zdp->z_mode & S_IXOTH) {
2434 mutex_exit(&zdp->z_acl_lock);
2439 mutex_exit(&zdp->z_acl_lock);
2442 DTRACE_PROBE(zfs__fastpath__execute__access__miss);
2443 ZFS_ENTER(ZTOZSB(zdp));
2444 error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr);
2445 ZFS_EXIT(ZTOZSB(zdp));
2450 * Determine whether Access should be granted/denied.
2451 * The least priv subsytem is always consulted as a basic privilege
2452 * can define any form of access.
2455 zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr)
2457 uint32_t working_mode;
2459 boolean_t check_privs;
2460 znode_t *check_zp = zp;
2465 * If attribute then validate against base file
2467 if ((zp->z_pflags & ZFS_XATTR) && S_ISDIR(ZTOI(zp)->i_mode)) {
2470 rw_enter(&zp->z_xattr_lock, RW_READER);
2471 if (zp->z_xattr_parent) {
2472 check_zp = zp->z_xattr_parent;
2473 rw_exit(&zp->z_xattr_lock);
2476 * Verify a lookup yields the same znode.
2478 ASSERT3S(sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(
2479 ZTOZSB(zp)), &parent, sizeof (parent)), ==, 0);
2480 ASSERT3U(check_zp->z_id, ==, parent);
2482 rw_exit(&zp->z_xattr_lock);
2484 error = sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(
2485 ZTOZSB(zp)), &parent, sizeof (parent));
2490 * Cache the lookup on the parent file znode as
2491 * zp->z_xattr_parent and hold a reference. This
2492 * effectively pins the parent in memory until all
2493 * child xattr znodes have been destroyed and
2494 * release their references in zfs_inode_destroy().
2496 error = zfs_zget(ZTOZSB(zp), parent, &check_zp);
2500 rw_enter(&zp->z_xattr_lock, RW_WRITER);
2501 if (zp->z_xattr_parent == NULL)
2502 zp->z_xattr_parent = check_zp;
2503 rw_exit(&zp->z_xattr_lock);
2507 * fixup mode to map to xattr perms
2510 if (mode & (ACE_WRITE_DATA|ACE_APPEND_DATA)) {
2511 mode &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
2512 mode |= ACE_WRITE_NAMED_ATTRS;
2515 if (mode & (ACE_READ_DATA|ACE_EXECUTE)) {
2516 mode &= ~(ACE_READ_DATA|ACE_EXECUTE);
2517 mode |= ACE_READ_NAMED_ATTRS;
2521 owner = zfs_fuid_map_id(ZTOZSB(zp), zp->z_uid, cr, ZFS_OWNER);
2523 * Map the bits required to the standard inode flags
2524 * S_IRUSR|S_IWUSR|S_IXUSR in the needed_bits. Map the bits
2525 * mapped by working_mode (currently missing) in missing_bits.
2526 * Call secpolicy_vnode_access2() with (needed_bits & ~checkmode),
2531 working_mode = mode;
2532 if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES)) &&
2533 owner == crgetuid(cr))
2534 working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES);
2536 if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS|
2537 ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE))
2538 needed_bits |= S_IRUSR;
2539 if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
2540 ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
2541 needed_bits |= S_IWUSR;
2542 if (working_mode & ACE_EXECUTE)
2543 needed_bits |= S_IXUSR;
2545 if ((error = zfs_zaccess_common(check_zp, mode, &working_mode,
2546 &check_privs, skipaclchk, cr)) == 0) {
2547 return (secpolicy_vnode_access2(cr, ZTOI(zp), owner,
2548 needed_bits, needed_bits));
2551 if (error && !check_privs) {
2555 if (error && (flags & V_APPEND)) {
2556 error = zfs_zaccess_append(zp, &working_mode, &check_privs, cr);
2559 if (error && check_privs) {
2560 mode_t checkmode = 0;
2563 * First check for implicit owner permission on
2564 * read_acl/read_attributes
2568 ASSERT(working_mode != 0);
2570 if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES) &&
2571 owner == crgetuid(cr)))
2572 working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES);
2574 if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS|
2575 ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE))
2576 checkmode |= S_IRUSR;
2577 if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
2578 ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
2579 checkmode |= S_IWUSR;
2580 if (working_mode & ACE_EXECUTE)
2581 checkmode |= S_IXUSR;
2583 error = secpolicy_vnode_access2(cr, ZTOI(check_zp), owner,
2584 needed_bits & ~checkmode, needed_bits);
2586 if (error == 0 && (working_mode & ACE_WRITE_OWNER))
2587 error = secpolicy_vnode_chown(cr, owner);
2588 if (error == 0 && (working_mode & ACE_WRITE_ACL))
2589 error = secpolicy_vnode_setdac(cr, owner);
2591 if (error == 0 && (working_mode &
2592 (ACE_DELETE|ACE_DELETE_CHILD)))
2593 error = secpolicy_vnode_remove(cr);
2595 if (error == 0 && (working_mode & ACE_SYNCHRONIZE)) {
2596 error = secpolicy_vnode_chown(cr, owner);
2600 * See if any bits other than those already checked
2601 * for are still present. If so then return EACCES
2603 if (working_mode & ~(ZFS_CHECKED_MASKS)) {
2607 } else if (error == 0) {
2608 error = secpolicy_vnode_access2(cr, ZTOI(zp), owner,
2609 needed_bits, needed_bits);
2616 * Translate traditional unix S_IRUSR/S_IWUSR/S_IXUSR mode into
2617 * native ACL format and call zfs_zaccess()
2620 zfs_zaccess_rwx(znode_t *zp, mode_t mode, int flags, cred_t *cr)
2622 return (zfs_zaccess(zp, zfs_unix_to_v4(mode >> 6), flags, B_FALSE, cr));
2626 * Access function for secpolicy_vnode_setattr
2629 zfs_zaccess_unix(znode_t *zp, mode_t mode, cred_t *cr)
2631 int v4_mode = zfs_unix_to_v4(mode >> 6);
2633 return (zfs_zaccess(zp, v4_mode, 0, B_FALSE, cr));
2637 zfs_delete_final_check(znode_t *zp, znode_t *dzp,
2638 mode_t available_perms, cred_t *cr)
2643 downer = zfs_fuid_map_id(ZTOZSB(dzp), dzp->z_uid, cr, ZFS_OWNER);
2645 error = secpolicy_vnode_access2(cr, ZTOI(dzp),
2646 downer, available_perms, S_IWUSR|S_IXUSR);
2649 error = zfs_sticky_remove_access(dzp, zp, cr);
2655 * Determine whether Access should be granted/deny, without
2656 * consulting least priv subsystem.
2659 * The following chart is the recommended NFSv4 enforcement for
2660 * ability to delete an object.
2662 * -------------------------------------------------------
2663 * | Parent Dir | Target Object Permissions |
2665 * -------------------------------------------------------
2666 * | | ACL Allows | ACL Denies| Delete |
2667 * | | Delete | Delete | unspecified|
2668 * -------------------------------------------------------
2669 * | ACL Allows | Permit | Permit | Permit |
2670 * | DELETE_CHILD | |
2671 * -------------------------------------------------------
2672 * | ACL Denies | Permit | Deny | Deny |
2673 * | DELETE_CHILD | | | |
2674 * -------------------------------------------------------
2675 * | ACL specifies | | | |
2676 * | only allow | Permit | Permit | Permit |
2677 * | write and | | | |
2679 * -------------------------------------------------------
2680 * | ACL denies | | | |
2681 * | write and | Permit | Deny | Deny |
2683 * -------------------------------------------------------
2686 * No search privilege, can't even look up file?
2690 zfs_zaccess_delete(znode_t *dzp, znode_t *zp, cred_t *cr)
2692 uint32_t dzp_working_mode = 0;
2693 uint32_t zp_working_mode = 0;
2694 int dzp_error, zp_error;
2695 mode_t available_perms;
2696 boolean_t dzpcheck_privs = B_TRUE;
2697 boolean_t zpcheck_privs = B_TRUE;
2700 * We want specific DELETE permissions to
2701 * take precedence over WRITE/EXECUTE. We don't
2702 * want an ACL such as this to mess us up.
2703 * user:joe:write_data:deny,user:joe:delete:allow
2705 * However, deny permissions may ultimately be overridden
2706 * by secpolicy_vnode_access().
2708 * We will ask for all of the necessary permissions and then
2709 * look at the working modes from the directory and target object
2710 * to determine what was found.
2713 if (zp->z_pflags & (ZFS_IMMUTABLE | ZFS_NOUNLINK))
2718 * If the directory permissions allow the delete, we are done.
2720 if ((dzp_error = zfs_zaccess_common(dzp, ACE_DELETE_CHILD,
2721 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0)
2725 * If target object has delete permission then we are done
2727 if ((zp_error = zfs_zaccess_common(zp, ACE_DELETE, &zp_working_mode,
2728 &zpcheck_privs, B_FALSE, cr)) == 0)
2731 ASSERT(dzp_error && zp_error);
2733 if (!dzpcheck_privs)
2741 * If directory returns EACCES then delete_child was denied
2742 * due to deny delete_child. In this case send the request through
2743 * secpolicy_vnode_remove(). We don't use zfs_delete_final_check()
2744 * since that *could* allow the delete based on write/execute permission
2745 * and we want delete permissions to override write/execute.
2748 if (dzp_error == EACCES)
2749 return (secpolicy_vnode_remove(cr));
2753 * only need to see if we have write/execute on directory.
2756 dzp_error = zfs_zaccess_common(dzp, ACE_EXECUTE|ACE_WRITE_DATA,
2757 &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr);
2759 if (dzp_error != 0 && !dzpcheck_privs)
2766 available_perms = (dzp_working_mode & ACE_WRITE_DATA) ? 0 : S_IWUSR;
2767 available_perms |= (dzp_working_mode & ACE_EXECUTE) ? 0 : S_IXUSR;
2769 return (zfs_delete_final_check(zp, dzp, available_perms, cr));
2774 zfs_zaccess_rename(znode_t *sdzp, znode_t *szp, znode_t *tdzp,
2775 znode_t *tzp, cred_t *cr)
2780 if (szp->z_pflags & ZFS_AV_QUARANTINED)
2783 add_perm = S_ISDIR(ZTOI(szp)->i_mode) ?
2784 ACE_ADD_SUBDIRECTORY : ACE_ADD_FILE;
2787 * Rename permissions are combination of delete permission +
2788 * add file/subdir permission.
2792 * first make sure we do the delete portion.
2794 * If that succeeds then check for add_file/add_subdir permissions
2797 if ((error = zfs_zaccess_delete(sdzp, szp, cr)))
2801 * If we have a tzp, see if we can delete it?
2804 if ((error = zfs_zaccess_delete(tdzp, tzp, cr)))
2809 * Now check for add permissions
2811 error = zfs_zaccess(tdzp, add_perm, 0, B_FALSE, cr);