4 * Common NFSv4 ACL handling code.
6 * Copyright (c) 2002, 2003 The Regents of the University of Michigan.
9 * Marius Aamodt Eriksen <marius@umich.edu>
10 * Jeff Sedlak <jsedlak@umich.edu>
11 * J. Bruce Fields <bfields@umich.edu>
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 3. Neither the name of the University nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
29 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
33 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
34 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
35 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
36 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/string.h>
40 #include <linux/slab.h>
41 #include <linux/list.h>
42 #include <linux/types.h>
44 #include <linux/module.h>
45 #include <linux/nfs_fs.h>
46 #include <linux/posix_acl.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs4_acl.h>
51 /* mode bit translations: */
52 #define NFS4_READ_MODE (NFS4_ACE_READ_DATA)
53 #define NFS4_WRITE_MODE (NFS4_ACE_WRITE_DATA | NFS4_ACE_APPEND_DATA)
54 #define NFS4_EXECUTE_MODE NFS4_ACE_EXECUTE
55 #define NFS4_ANYONE_MODE (NFS4_ACE_READ_ATTRIBUTES | NFS4_ACE_READ_ACL | NFS4_ACE_SYNCHRONIZE)
56 #define NFS4_OWNER_MODE (NFS4_ACE_WRITE_ATTRIBUTES | NFS4_ACE_WRITE_ACL)
58 /* We don't support these bits; insist they be neither allowed nor denied */
59 #define NFS4_MASK_UNSUPP (NFS4_ACE_DELETE | NFS4_ACE_WRITE_OWNER \
60 | NFS4_ACE_READ_NAMED_ATTRS | NFS4_ACE_WRITE_NAMED_ATTRS)
62 /* flags used to simulate posix default ACLs */
63 #define NFS4_INHERITANCE_FLAGS (NFS4_ACE_FILE_INHERIT_ACE \
64 | NFS4_ACE_DIRECTORY_INHERIT_ACE)
66 #define NFS4_SUPPORTED_FLAGS (NFS4_INHERITANCE_FLAGS \
67 | NFS4_ACE_INHERIT_ONLY_ACE \
68 | NFS4_ACE_IDENTIFIER_GROUP)
70 #define MASK_EQUAL(mask1, mask2) \
71 ( ((mask1) & NFS4_ACE_MASK_ALL) == ((mask2) & NFS4_ACE_MASK_ALL) )
74 mask_from_posix(unsigned short perm, unsigned int flags)
76 int mask = NFS4_ANYONE_MODE;
78 if (flags & NFS4_ACL_OWNER)
79 mask |= NFS4_OWNER_MODE;
81 mask |= NFS4_READ_MODE;
83 mask |= NFS4_WRITE_MODE;
84 if ((perm & ACL_WRITE) && (flags & NFS4_ACL_DIR))
85 mask |= NFS4_ACE_DELETE_CHILD;
86 if (perm & ACL_EXECUTE)
87 mask |= NFS4_EXECUTE_MODE;
92 deny_mask(u32 allow_mask, unsigned int flags)
94 u32 ret = ~allow_mask & ~NFS4_MASK_UNSUPP;
95 if (!(flags & NFS4_ACL_DIR))
96 ret &= ~NFS4_ACE_DELETE_CHILD;
100 /* XXX: modify functions to return NFS errors; they're only ever
101 * used by nfs code, after all.... */
103 /* We only map from NFSv4 to POSIX ACLs when setting ACLs, when we err on the
104 * side of being more restrictive, so the mode bit mapping below is
105 * pessimistic. An optimistic version would be needed to handle DENY's,
106 * but we espect to coalesce all ALLOWs and DENYs before mapping to mode
110 low_mode_from_nfs4(u32 perm, unsigned short *mode, unsigned int flags)
112 u32 write_mode = NFS4_WRITE_MODE;
114 if (flags & NFS4_ACL_DIR)
115 write_mode |= NFS4_ACE_DELETE_CHILD;
117 if ((perm & NFS4_READ_MODE) == NFS4_READ_MODE)
119 if ((perm & write_mode) == write_mode)
121 if ((perm & NFS4_EXECUTE_MODE) == NFS4_EXECUTE_MODE)
122 *mode |= ACL_EXECUTE;
125 struct ace_container {
126 struct nfs4_ace *ace;
127 struct list_head ace_l;
130 static short ace2type(struct nfs4_ace *);
131 static int _posix_to_nfsv4_one(struct posix_acl *, struct nfs4_acl *, unsigned int);
132 static struct posix_acl *_nfsv4_to_posix_one(struct nfs4_acl *, unsigned int);
133 int nfs4_acl_add_ace(struct nfs4_acl *, u32, u32, u32, int, uid_t);
134 static int nfs4_acl_split(struct nfs4_acl *, struct nfs4_acl *);
137 nfs4_acl_posix_to_nfsv4(struct posix_acl *pacl, struct posix_acl *dpacl,
140 struct nfs4_acl *acl;
144 (posix_acl_valid(pacl) < 0 || pacl->a_count == 0)) ||
146 (posix_acl_valid(dpacl) < 0 || dpacl->a_count == 0)))
149 acl = nfs4_acl_new();
156 error = _posix_to_nfsv4_one(pacl, acl,
157 flags & ~NFS4_ACL_TYPE_DEFAULT);
163 error = _posix_to_nfsv4_one(dpacl, acl,
164 flags | NFS4_ACL_TYPE_DEFAULT);
174 acl = ERR_PTR(error);
180 nfs4_acl_add_pair(struct nfs4_acl *acl, int eflag, u32 mask, int whotype,
181 uid_t owner, unsigned int flags)
185 error = nfs4_acl_add_ace(acl, NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE,
186 eflag, mask, whotype, owner);
189 error = nfs4_acl_add_ace(acl, NFS4_ACE_ACCESS_DENIED_ACE_TYPE,
190 eflag, deny_mask(mask, flags), whotype, owner);
194 /* We assume the acl has been verified with posix_acl_valid. */
196 _posix_to_nfsv4_one(struct posix_acl *pacl, struct nfs4_acl *acl,
199 struct posix_acl_entry *pa, *pe, *group_owner_entry;
202 int eflag = ((flags & NFS4_ACL_TYPE_DEFAULT) ?
203 NFS4_INHERITANCE_FLAGS : 0);
205 BUG_ON(pacl->a_count < 3);
206 pe = pacl->a_entries + pacl->a_count;
207 pa = pe - 2; /* if mask entry exists, it's second from the last. */
208 if (pa->e_tag == ACL_MASK)
209 mask_mask = deny_mask(mask_from_posix(pa->e_perm, flags), flags);
213 pa = pacl->a_entries;
214 BUG_ON(pa->e_tag != ACL_USER_OBJ);
215 mask = mask_from_posix(pa->e_perm, flags | NFS4_ACL_OWNER);
216 error = nfs4_acl_add_pair(acl, eflag, mask, NFS4_ACL_WHO_OWNER, 0, flags);
221 while (pa->e_tag == ACL_USER) {
222 mask = mask_from_posix(pa->e_perm, flags);
223 error = nfs4_acl_add_ace(acl, NFS4_ACE_ACCESS_DENIED_ACE_TYPE,
224 eflag, mask_mask, NFS4_ACL_WHO_NAMED, pa->e_id);
229 error = nfs4_acl_add_pair(acl, eflag, mask,
230 NFS4_ACL_WHO_NAMED, pa->e_id, flags);
236 /* In the case of groups, we apply allow ACEs first, then deny ACEs,
237 * since a user can be in more than one group. */
241 if (pacl->a_count > 3) {
242 BUG_ON(pa->e_tag != ACL_GROUP_OBJ);
243 error = nfs4_acl_add_ace(acl, NFS4_ACE_ACCESS_DENIED_ACE_TYPE,
244 NFS4_ACE_IDENTIFIER_GROUP | eflag, mask_mask,
245 NFS4_ACL_WHO_GROUP, 0);
249 group_owner_entry = pa;
250 mask = mask_from_posix(pa->e_perm, flags);
251 error = nfs4_acl_add_ace(acl, NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE,
252 NFS4_ACE_IDENTIFIER_GROUP | eflag, mask,
253 NFS4_ACL_WHO_GROUP, 0);
258 while (pa->e_tag == ACL_GROUP) {
259 mask = mask_from_posix(pa->e_perm, flags);
260 error = nfs4_acl_add_ace(acl, NFS4_ACE_ACCESS_DENIED_ACE_TYPE,
261 NFS4_ACE_IDENTIFIER_GROUP | eflag, mask_mask,
262 NFS4_ACL_WHO_NAMED, pa->e_id);
266 error = nfs4_acl_add_ace(acl, NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE,
267 NFS4_ACE_IDENTIFIER_GROUP | eflag, mask,
268 NFS4_ACL_WHO_NAMED, pa->e_id);
276 pa = group_owner_entry;
277 mask = mask_from_posix(pa->e_perm, flags);
278 error = nfs4_acl_add_ace(acl, NFS4_ACE_ACCESS_DENIED_ACE_TYPE,
279 NFS4_ACE_IDENTIFIER_GROUP | eflag,
280 deny_mask(mask, flags), NFS4_ACL_WHO_GROUP, 0);
284 while (pa->e_tag == ACL_GROUP) {
285 mask = mask_from_posix(pa->e_perm, flags);
286 error = nfs4_acl_add_ace(acl, NFS4_ACE_ACCESS_DENIED_ACE_TYPE,
287 NFS4_ACE_IDENTIFIER_GROUP | eflag,
288 deny_mask(mask, flags), NFS4_ACL_WHO_NAMED, pa->e_id);
294 if (pa->e_tag == ACL_MASK)
296 BUG_ON(pa->e_tag != ACL_OTHER);
297 mask = mask_from_posix(pa->e_perm, flags);
298 error = nfs4_acl_add_pair(acl, eflag, mask, NFS4_ACL_WHO_EVERYONE, 0, flags);
305 sort_pacl_range(struct posix_acl *pacl, int start, int end) {
307 struct posix_acl_entry tmp;
309 /* We just do a bubble sort; easy to do in place, and we're not
310 * expecting acl's to be long enough to justify anything more. */
313 for (i = start; i < end; i++) {
314 if (pacl->a_entries[i].e_id
315 > pacl->a_entries[i+1].e_id) {
317 tmp = pacl->a_entries[i];
318 pacl->a_entries[i] = pacl->a_entries[i+1];
319 pacl->a_entries[i+1] = tmp;
326 sort_pacl(struct posix_acl *pacl)
328 /* posix_acl_valid requires that users and groups be in order
332 if (pacl->a_count <= 4)
333 return; /* no users or groups */
335 while (pacl->a_entries[i].e_tag == ACL_USER)
337 sort_pacl_range(pacl, 1, i-1);
339 BUG_ON(pacl->a_entries[i].e_tag != ACL_GROUP_OBJ);
341 while (pacl->a_entries[j].e_tag == ACL_GROUP)
343 sort_pacl_range(pacl, i, j-1);
348 nfs4_acl_nfsv4_to_posix(struct nfs4_acl *acl, struct posix_acl **pacl,
349 struct posix_acl **dpacl, unsigned int flags)
351 struct nfs4_acl *dacl;
357 dacl = nfs4_acl_new();
361 error = nfs4_acl_split(acl, dacl);
365 *pacl = _nfsv4_to_posix_one(acl, flags);
367 error = PTR_ERR(*pacl);
372 *dpacl = _nfsv4_to_posix_one(dacl, flags);
373 if (IS_ERR(*dpacl)) {
374 error = PTR_ERR(*dpacl);
379 posix_acl_release(*pacl);
388 * While processing the NFSv4 ACE, this maintains bitmasks representing
389 * which permission bits have been allowed and which denied to a given
391 struct posix_ace_state {
396 struct posix_user_ace_state {
398 struct posix_ace_state perms;
401 struct posix_ace_state_array {
403 struct posix_user_ace_state aces[];
407 * While processing the NFSv4 ACE, this maintains the partial permissions
408 * calculated so far: */
410 struct posix_acl_state {
411 struct posix_ace_state owner;
412 struct posix_ace_state group;
413 struct posix_ace_state other;
414 struct posix_ace_state everyone;
415 struct posix_ace_state mask; /* Deny unused in this case */
416 struct posix_ace_state_array *users;
417 struct posix_ace_state_array *groups;
421 init_state(struct posix_acl_state *state, int cnt)
425 memset(state, 0, sizeof(struct posix_acl_state));
427 * In the worst case, each individual acl could be for a distinct
428 * named user or group, but we don't no which, so we allocate
429 * enough space for either:
431 alloc = sizeof(struct posix_ace_state_array)
432 + cnt*sizeof(struct posix_ace_state);
433 state->users = kzalloc(alloc, GFP_KERNEL);
436 state->groups = kzalloc(alloc, GFP_KERNEL);
437 if (!state->groups) {
445 free_state(struct posix_acl_state *state) {
447 kfree(state->groups);
450 static inline void add_to_mask(struct posix_acl_state *state, struct posix_ace_state *astate)
452 state->mask.allow |= astate->allow;
456 * Certain bits (SYNCHRONIZE, DELETE, WRITE_OWNER, READ/WRITE_NAMED_ATTRS,
457 * READ_ATTRIBUTES, READ_ACL) are currently unenforceable and don't translate
458 * to traditional read/write/execute permissions.
460 * It's problematic to reject acls that use certain mode bits, because it
461 * places the burden on users to learn the rules about which bits one
462 * particular server sets, without giving the user a lot of help--we return an
463 * error that could mean any number of different things. To make matters
464 * worse, the problematic bits might be introduced by some application that's
465 * automatically mapping from some other acl model.
467 * So wherever possible we accept anything, possibly erring on the side of
468 * denying more permissions than necessary.
470 * However we do reject *explicit* DENY's of a few bits representing
471 * permissions we could never deny:
474 static inline int check_deny(u32 mask, int isowner)
476 if (mask & (NFS4_ACE_READ_ATTRIBUTES | NFS4_ACE_READ_ACL))
480 if (mask & (NFS4_ACE_WRITE_ATTRIBUTES | NFS4_ACE_WRITE_ACL))
485 static struct posix_acl *
486 posix_state_to_acl(struct posix_acl_state *state, unsigned int flags)
488 struct posix_acl_entry *pace;
489 struct posix_acl *pacl;
493 nace = 4 + state->users->n + state->groups->n;
494 pacl = posix_acl_alloc(nace, GFP_KERNEL);
496 return ERR_PTR(-ENOMEM);
498 pace = pacl->a_entries;
499 pace->e_tag = ACL_USER_OBJ;
500 error = check_deny(state->owner.deny, 1);
503 low_mode_from_nfs4(state->owner.allow, &pace->e_perm, flags);
504 pace->e_id = ACL_UNDEFINED_ID;
506 for (i=0; i < state->users->n; i++) {
508 pace->e_tag = ACL_USER;
509 error = check_deny(state->users->aces[i].perms.deny, 0);
512 low_mode_from_nfs4(state->users->aces[i].perms.allow,
513 &pace->e_perm, flags);
514 pace->e_id = state->users->aces[i].uid;
515 add_to_mask(state, &state->users->aces[i].perms);
519 pace->e_tag = ACL_GROUP_OBJ;
520 error = check_deny(state->group.deny, 0);
523 low_mode_from_nfs4(state->group.allow, &pace->e_perm, flags);
524 pace->e_id = ACL_UNDEFINED_ID;
525 add_to_mask(state, &state->group);
527 for (i=0; i < state->groups->n; i++) {
529 pace->e_tag = ACL_GROUP;
530 error = check_deny(state->groups->aces[i].perms.deny, 0);
533 low_mode_from_nfs4(state->groups->aces[i].perms.allow,
534 &pace->e_perm, flags);
535 pace->e_id = state->groups->aces[i].uid;
536 add_to_mask(state, &state->groups->aces[i].perms);
540 pace->e_tag = ACL_MASK;
541 low_mode_from_nfs4(state->mask.allow, &pace->e_perm, flags);
542 pace->e_id = ACL_UNDEFINED_ID;
545 pace->e_tag = ACL_OTHER;
546 error = check_deny(state->other.deny, 0);
549 low_mode_from_nfs4(state->other.allow, &pace->e_perm, flags);
550 pace->e_id = ACL_UNDEFINED_ID;
554 posix_acl_release(pacl);
555 return ERR_PTR(error);
558 static inline void allow_bits(struct posix_ace_state *astate, u32 mask)
560 /* Allow all bits in the mask not already denied: */
561 astate->allow |= mask & ~astate->deny;
564 static inline void deny_bits(struct posix_ace_state *astate, u32 mask)
566 /* Deny all bits in the mask not already allowed: */
567 astate->deny |= mask & ~astate->allow;
570 static int find_uid(struct posix_acl_state *state, struct posix_ace_state_array *a, uid_t uid)
574 for (i = 0; i < a->n; i++)
575 if (a->aces[i].uid == uid)
579 a->aces[i].uid = uid;
580 a->aces[i].perms.allow = state->everyone.allow;
581 a->aces[i].perms.deny = state->everyone.deny;
586 static void deny_bits_array(struct posix_ace_state_array *a, u32 mask)
590 for (i=0; i < a->n; i++)
591 deny_bits(&a->aces[i].perms, mask);
594 static void allow_bits_array(struct posix_ace_state_array *a, u32 mask)
598 for (i=0; i < a->n; i++)
599 allow_bits(&a->aces[i].perms, mask);
602 static void process_one_v4_ace(struct posix_acl_state *state,
603 struct nfs4_ace *ace)
605 u32 mask = ace->access_mask;
608 switch (ace2type(ace)) {
610 if (ace->type == NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE) {
611 allow_bits(&state->owner, mask);
613 deny_bits(&state->owner, mask);
617 i = find_uid(state, state->users, ace->who);
618 if (ace->type == NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE) {
619 allow_bits(&state->users->aces[i].perms, mask);
621 deny_bits(&state->users->aces[i].perms, mask);
622 mask = state->users->aces[i].perms.deny;
623 deny_bits(&state->owner, mask);
627 if (ace->type == NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE) {
628 allow_bits(&state->group, mask);
630 deny_bits(&state->group, mask);
631 mask = state->group.deny;
632 deny_bits(&state->owner, mask);
633 deny_bits(&state->everyone, mask);
634 deny_bits_array(state->users, mask);
635 deny_bits_array(state->groups, mask);
639 i = find_uid(state, state->groups, ace->who);
640 if (ace->type == NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE) {
641 allow_bits(&state->groups->aces[i].perms, mask);
643 deny_bits(&state->groups->aces[i].perms, mask);
644 mask = state->groups->aces[i].perms.deny;
645 deny_bits(&state->owner, mask);
646 deny_bits(&state->group, mask);
647 deny_bits(&state->everyone, mask);
648 deny_bits_array(state->users, mask);
649 deny_bits_array(state->groups, mask);
653 if (ace->type == NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE) {
654 allow_bits(&state->owner, mask);
655 allow_bits(&state->group, mask);
656 allow_bits(&state->other, mask);
657 allow_bits(&state->everyone, mask);
658 allow_bits_array(state->users, mask);
659 allow_bits_array(state->groups, mask);
661 deny_bits(&state->owner, mask);
662 deny_bits(&state->group, mask);
663 deny_bits(&state->other, mask);
664 deny_bits(&state->everyone, mask);
665 deny_bits_array(state->users, mask);
666 deny_bits_array(state->groups, mask);
671 static struct posix_acl *
672 _nfsv4_to_posix_one(struct nfs4_acl *n4acl, unsigned int flags)
674 struct posix_acl_state state;
675 struct posix_acl *pacl;
676 struct nfs4_ace *ace;
679 ret = init_state(&state, n4acl->naces);
683 list_for_each_entry(ace, &n4acl->ace_head, l_ace)
684 process_one_v4_ace(&state, ace);
686 pacl = posix_state_to_acl(&state, flags);
696 nfs4_acl_split(struct nfs4_acl *acl, struct nfs4_acl *dacl)
698 struct list_head *h, *n;
699 struct nfs4_ace *ace;
702 list_for_each_safe(h, n, &acl->ace_head) {
703 ace = list_entry(h, struct nfs4_ace, l_ace);
705 if (ace->type != NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE &&
706 ace->type != NFS4_ACE_ACCESS_DENIED_ACE_TYPE)
709 if (ace->flag & ~NFS4_SUPPORTED_FLAGS)
712 if ((ace->flag & NFS4_INHERITANCE_FLAGS) == 0) {
713 /* Leave this ace in the effective acl: */
717 * Note that when only one of FILE_INHERIT or DIRECTORY_INHERIT
718 * is set, we're effectively turning on the other. That's OK,
719 * according to rfc 3530.
721 if (ace->flag & NFS4_ACE_INHERIT_ONLY_ACE) {
722 /* Add this ace to the default acl and remove it
723 * from the effective acl: */
724 error = nfs4_acl_add_ace(dacl, ace->type, ace->flag,
725 ace->access_mask, ace->whotype, ace->who);
732 /* Add this ace to the default, but leave it in
733 * the effective acl as well: */
734 error = nfs4_acl_add_ace(dacl, ace->type, ace->flag,
735 ace->access_mask, ace->whotype, ace->who);
744 ace2type(struct nfs4_ace *ace)
746 switch (ace->whotype) {
747 case NFS4_ACL_WHO_NAMED:
748 return (ace->flag & NFS4_ACE_IDENTIFIER_GROUP ?
749 ACL_GROUP : ACL_USER);
750 case NFS4_ACL_WHO_OWNER:
752 case NFS4_ACL_WHO_GROUP:
753 return ACL_GROUP_OBJ;
754 case NFS4_ACL_WHO_EVERYONE:
761 EXPORT_SYMBOL(nfs4_acl_posix_to_nfsv4);
762 EXPORT_SYMBOL(nfs4_acl_nfsv4_to_posix);
767 struct nfs4_acl *acl;
769 if ((acl = kmalloc(sizeof(*acl), GFP_KERNEL)) == NULL)
773 INIT_LIST_HEAD(&acl->ace_head);
779 nfs4_acl_free(struct nfs4_acl *acl)
782 struct nfs4_ace *ace;
787 while (!list_empty(&acl->ace_head)) {
788 h = acl->ace_head.next;
790 ace = list_entry(h, struct nfs4_ace, l_ace);
800 nfs4_acl_add_ace(struct nfs4_acl *acl, u32 type, u32 flag, u32 access_mask,
801 int whotype, uid_t who)
803 struct nfs4_ace *ace;
805 if ((ace = kmalloc(sizeof(*ace), GFP_KERNEL)) == NULL)
810 ace->access_mask = access_mask;
811 ace->whotype = whotype;
814 list_add_tail(&ace->l_ace, &acl->ace_head);
827 .stringlen = sizeof("OWNER@") - 1,
828 .type = NFS4_ACL_WHO_OWNER,
832 .stringlen = sizeof("GROUP@") - 1,
833 .type = NFS4_ACL_WHO_GROUP,
836 .string = "EVERYONE@",
837 .stringlen = sizeof("EVERYONE@") - 1,
838 .type = NFS4_ACL_WHO_EVERYONE,
843 nfs4_acl_get_whotype(char *p, u32 len)
847 for (i = 0; i < ARRAY_SIZE(s2t_map); i++) {
848 if (s2t_map[i].stringlen == len &&
849 0 == memcmp(s2t_map[i].string, p, len))
850 return s2t_map[i].type;
852 return NFS4_ACL_WHO_NAMED;
856 nfs4_acl_write_who(int who, char *p)
860 for (i = 0; i < ARRAY_SIZE(s2t_map); i++) {
861 if (s2t_map[i].type == who) {
862 memcpy(p, s2t_map[i].string, s2t_map[i].stringlen);
863 return s2t_map[i].stringlen;
870 EXPORT_SYMBOL(nfs4_acl_new);
871 EXPORT_SYMBOL(nfs4_acl_free);
872 EXPORT_SYMBOL(nfs4_acl_add_ace);
873 EXPORT_SYMBOL(nfs4_acl_get_whotype);
874 EXPORT_SYMBOL(nfs4_acl_write_who);