2 * Copyright (c) 2001 Chris D. Faulhaber
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
36 #include "acl_support.h"
39 * These routines from sys/kern/subr_acl_nfs4.c are used by both kernel
42 void acl_nfs4_sync_mode_from_acl(mode_t *_mode, const struct acl *aclp);
43 void acl_nfs4_trivial_from_mode_libc(struct acl *aclp, int file_owner_id,
47 _nfs4_acl_strip_np(const acl_t aclp, int canonical_six)
52 newacl = acl_init(ACL_MAX_ENTRIES);
58 _acl_brand_as(newacl, ACL_BRAND_NFS4);
60 acl_nfs4_sync_mode_from_acl(&mode, &(aclp->ats_acl));
61 acl_nfs4_trivial_from_mode_libc(&(newacl->ats_acl), mode, canonical_six);
67 _posix1e_acl_strip_np(const acl_t aclp, int recalculate_mask)
69 acl_t acl_new, acl_old;
70 acl_entry_t entry, entry_new;
73 int entry_id, have_mask_entry;
75 assert(_acl_brand(aclp) == ACL_BRAND_POSIX);
77 acl_old = acl_dup(aclp);
81 assert(_acl_brand(acl_old) == ACL_BRAND_POSIX);
84 acl_new = acl_init(ACL_MAX_ENTRIES);
87 tag = ACL_UNDEFINED_TAG;
89 /* only save the default user/group/other entries */
90 entry_id = ACL_FIRST_ENTRY;
91 while (acl_get_entry(acl_old, entry_id, &entry) == 1) {
92 entry_id = ACL_NEXT_ENTRY;
94 assert(_entry_brand(entry) == ACL_BRAND_POSIX);
96 if (acl_get_tag_type(entry, &tag) == -1)
103 if (acl_get_tag_type(entry, &tag) == -1)
105 if (acl_get_permset(entry, &perm) == -1)
107 if (acl_create_entry(&acl_new, &entry_new) == -1)
109 if (acl_set_tag_type(entry_new, tag) == -1)
111 if (acl_set_permset(entry_new, perm) == -1)
113 if (acl_copy_entry(entry_new, entry) == -1)
115 assert(_entry_brand(entry_new) == ACL_BRAND_POSIX);
125 assert(_acl_brand(acl_new) == ACL_BRAND_POSIX);
127 if (have_mask_entry && recalculate_mask) {
128 if (acl_calc_mask(&acl_new) == -1)
136 acl_strip_np(const acl_t aclp, int recalculate_mask)
138 switch (_acl_brand(aclp)) {
140 return (_nfs4_acl_strip_np(aclp, 0));
142 case ACL_BRAND_POSIX:
143 return (_posix1e_acl_strip_np(aclp, recalculate_mask));
152 * Return 1, if ACL is trivial, 0 otherwise.
154 * ACL is trivial, iff its meaning could be fully expressed using just file
155 * mode. In other words, ACL is trivial iff it doesn't have "+" to the right
156 * of the mode bits in "ls -l" output ;-)
159 acl_is_trivial_np(const acl_t aclp, int *trivialp)
164 if (aclp == NULL || trivialp == NULL) {
169 switch (_acl_brand(aclp)) {
170 case ACL_BRAND_POSIX:
171 if (aclp->ats_acl.acl_cnt == 3)
180 * If the ACL has more than canonical six entries,
181 * it's non trivial by definition.
183 if (aclp->ats_acl.acl_cnt > 6) {
189 * Calculate trivial ACL - using acl_strip_np(3) - and compare
192 tmpacl = _nfs4_acl_strip_np(aclp, 0);
196 differs = _acl_differs(aclp, tmpacl);
205 * Try again with an old-style, "canonical six" trivial ACL.
207 tmpacl = _nfs4_acl_strip_np(aclp, 1);
211 differs = _acl_differs(aclp, tmpacl);