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1/*
2 * Copyright (C) International Business Machines Corp., 2002-2004
3 * Copyright (C) Andreas Gruenbacher, 2001
4 * Copyright (C) Linus Torvalds, 1991, 1992
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
14 * the GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#include <linux/sched.h>
22#include <linux/slab.h>
23#include <linux/fs.h>
24#include <linux/posix_acl_xattr.h>
25#include "jfs_incore.h"
26#include "jfs_txnmgr.h"
27#include "jfs_xattr.h"
28#include "jfs_acl.h"
29
30struct posix_acl *jfs_get_acl(struct inode *inode, int type)
31{
32 struct posix_acl *acl;
33 char *ea_name;
34 int size;
35 char *value = NULL;
36
37 switch(type) {
38 case ACL_TYPE_ACCESS:
39 ea_name = XATTR_NAME_POSIX_ACL_ACCESS;
40 break;
41 case ACL_TYPE_DEFAULT:
42 ea_name = XATTR_NAME_POSIX_ACL_DEFAULT;
43 break;
44 default:
45 return ERR_PTR(-EINVAL);
46 }
47
48 size = __jfs_getxattr(inode, ea_name, NULL, 0);
49
50 if (size > 0) {
51 value = kmalloc(size, GFP_KERNEL);
52 if (!value)
53 return ERR_PTR(-ENOMEM);
54 size = __jfs_getxattr(inode, ea_name, value, size);
55 }
56
57 if (size < 0) {
58 if (size == -ENODATA)
59 acl = NULL;
60 else
61 acl = ERR_PTR(size);
62 } else {
63 acl = posix_acl_from_xattr(&init_user_ns, value, size);
64 }
65 kfree(value);
66 return acl;
67}
68
69static int __jfs_set_acl(tid_t tid, struct inode *inode, int type,
70 struct posix_acl *acl)
71{
72 char *ea_name;
73 int rc;
74 int size = 0;
75 char *value = NULL;
76
77 switch (type) {
78 case ACL_TYPE_ACCESS:
79 ea_name = XATTR_NAME_POSIX_ACL_ACCESS;
80 if (acl) {
81 rc = posix_acl_update_mode(inode, &inode->i_mode, &acl);
82 if (rc)
83 return rc;
84 inode->i_ctime = current_time(inode);
85 mark_inode_dirty(inode);
86 }
87 break;
88 case ACL_TYPE_DEFAULT:
89 ea_name = XATTR_NAME_POSIX_ACL_DEFAULT;
90 break;
91 default:
92 return -EINVAL;
93 }
94
95 if (acl) {
96 size = posix_acl_xattr_size(acl->a_count);
97 value = kmalloc(size, GFP_KERNEL);
98 if (!value)
99 return -ENOMEM;
100 rc = posix_acl_to_xattr(&init_user_ns, acl, value, size);
101 if (rc < 0)
102 goto out;
103 }
104 rc = __jfs_setxattr(tid, inode, ea_name, value, size, 0);
105out:
106 kfree(value);
107
108 if (!rc)
109 set_cached_acl(inode, type, acl);
110
111 return rc;
112}
113
114int jfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
115{
116 int rc;
117 tid_t tid;
118
119 tid = txBegin(inode->i_sb, 0);
120 mutex_lock(&JFS_IP(inode)->commit_mutex);
121 rc = __jfs_set_acl(tid, inode, type, acl);
122 if (!rc)
123 rc = txCommit(tid, 1, &inode, 0);
124 txEnd(tid);
125 mutex_unlock(&JFS_IP(inode)->commit_mutex);
126 return rc;
127}
128
129int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
130{
131 struct posix_acl *default_acl, *acl;
132 int rc = 0;
133
134 rc = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
135 if (rc)
136 return rc;
137
138 if (default_acl) {
139 rc = __jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, default_acl);
140 posix_acl_release(default_acl);
141 }
142
143 if (acl) {
144 if (!rc)
145 rc = __jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl);
146 posix_acl_release(acl);
147 }
148
149 JFS_IP(inode)->mode2 = (JFS_IP(inode)->mode2 & 0xffff0000) |
150 inode->i_mode;
151
152 return rc;
153}
1/*
2 * Copyright (C) International Business Machines Corp., 2002-2004
3 * Copyright (C) Andreas Gruenbacher, 2001
4 * Copyright (C) Linus Torvalds, 1991, 1992
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
14 * the GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#include <linux/sched.h>
22#include <linux/slab.h>
23#include <linux/fs.h>
24#include <linux/posix_acl_xattr.h>
25#include "jfs_incore.h"
26#include "jfs_txnmgr.h"
27#include "jfs_xattr.h"
28#include "jfs_acl.h"
29
30struct posix_acl *jfs_get_acl(struct inode *inode, int type)
31{
32 struct posix_acl *acl;
33 char *ea_name;
34 int size;
35 char *value = NULL;
36
37 acl = get_cached_acl(inode, type);
38 if (acl != ACL_NOT_CACHED)
39 return acl;
40
41 switch(type) {
42 case ACL_TYPE_ACCESS:
43 ea_name = POSIX_ACL_XATTR_ACCESS;
44 break;
45 case ACL_TYPE_DEFAULT:
46 ea_name = POSIX_ACL_XATTR_DEFAULT;
47 break;
48 default:
49 return ERR_PTR(-EINVAL);
50 }
51
52 size = __jfs_getxattr(inode, ea_name, NULL, 0);
53
54 if (size > 0) {
55 value = kmalloc(size, GFP_KERNEL);
56 if (!value)
57 return ERR_PTR(-ENOMEM);
58 size = __jfs_getxattr(inode, ea_name, value, size);
59 }
60
61 if (size < 0) {
62 if (size == -ENODATA)
63 acl = NULL;
64 else
65 acl = ERR_PTR(size);
66 } else {
67 acl = posix_acl_from_xattr(value, size);
68 }
69 kfree(value);
70 if (!IS_ERR(acl))
71 set_cached_acl(inode, type, acl);
72 return acl;
73}
74
75static int jfs_set_acl(tid_t tid, struct inode *inode, int type,
76 struct posix_acl *acl)
77{
78 char *ea_name;
79 int rc;
80 int size = 0;
81 char *value = NULL;
82
83 if (S_ISLNK(inode->i_mode))
84 return -EOPNOTSUPP;
85
86 switch(type) {
87 case ACL_TYPE_ACCESS:
88 ea_name = POSIX_ACL_XATTR_ACCESS;
89 break;
90 case ACL_TYPE_DEFAULT:
91 ea_name = POSIX_ACL_XATTR_DEFAULT;
92 if (!S_ISDIR(inode->i_mode))
93 return acl ? -EACCES : 0;
94 break;
95 default:
96 return -EINVAL;
97 }
98 if (acl) {
99 size = posix_acl_xattr_size(acl->a_count);
100 value = kmalloc(size, GFP_KERNEL);
101 if (!value)
102 return -ENOMEM;
103 rc = posix_acl_to_xattr(acl, value, size);
104 if (rc < 0)
105 goto out;
106 }
107 rc = __jfs_setxattr(tid, inode, ea_name, value, size, 0);
108out:
109 kfree(value);
110
111 if (!rc)
112 set_cached_acl(inode, type, acl);
113
114 return rc;
115}
116
117int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
118{
119 struct posix_acl *acl = NULL;
120 int rc = 0;
121
122 if (S_ISLNK(inode->i_mode))
123 return 0;
124
125 acl = jfs_get_acl(dir, ACL_TYPE_DEFAULT);
126 if (IS_ERR(acl))
127 return PTR_ERR(acl);
128
129 if (acl) {
130 if (S_ISDIR(inode->i_mode)) {
131 rc = jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, acl);
132 if (rc)
133 goto cleanup;
134 }
135 rc = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
136 if (rc < 0)
137 goto cleanup; /* posix_acl_release(NULL) is no-op */
138 if (rc > 0)
139 rc = jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl);
140cleanup:
141 posix_acl_release(acl);
142 } else
143 inode->i_mode &= ~current_umask();
144
145 JFS_IP(inode)->mode2 = (JFS_IP(inode)->mode2 & 0xffff0000) |
146 inode->i_mode;
147
148 return rc;
149}
150
151int jfs_acl_chmod(struct inode *inode)
152{
153 struct posix_acl *acl;
154 int rc;
155 tid_t tid;
156
157 if (S_ISLNK(inode->i_mode))
158 return -EOPNOTSUPP;
159
160 acl = jfs_get_acl(inode, ACL_TYPE_ACCESS);
161 if (IS_ERR(acl) || !acl)
162 return PTR_ERR(acl);
163
164 rc = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
165 if (rc)
166 return rc;
167
168 tid = txBegin(inode->i_sb, 0);
169 mutex_lock(&JFS_IP(inode)->commit_mutex);
170 rc = jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl);
171 if (!rc)
172 rc = txCommit(tid, 1, &inode, 0);
173 txEnd(tid);
174 mutex_unlock(&JFS_IP(inode)->commit_mutex);
175
176 posix_acl_release(acl);
177 return rc;
178}