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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 break;
81 case ACL_TYPE_DEFAULT:
82 ea_name = XATTR_NAME_POSIX_ACL_DEFAULT;
83 break;
84 default:
85 return -EINVAL;
86 }
87
88 if (acl) {
89 size = posix_acl_xattr_size(acl->a_count);
90 value = kmalloc(size, GFP_KERNEL);
91 if (!value)
92 return -ENOMEM;
93 rc = posix_acl_to_xattr(&init_user_ns, acl, value, size);
94 if (rc < 0)
95 goto out;
96 }
97 rc = __jfs_setxattr(tid, inode, ea_name, value, size, 0);
98out:
99 kfree(value);
100
101 if (!rc)
102 set_cached_acl(inode, type, acl);
103
104 return rc;
105}
106
107int jfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
108{
109 int rc;
110 tid_t tid;
111 int update_mode = 0;
112 umode_t mode = inode->i_mode;
113
114 tid = txBegin(inode->i_sb, 0);
115 mutex_lock(&JFS_IP(inode)->commit_mutex);
116 if (type == ACL_TYPE_ACCESS && acl) {
117 rc = posix_acl_update_mode(inode, &mode, &acl);
118 if (rc)
119 goto end_tx;
120 update_mode = 1;
121 }
122 rc = __jfs_set_acl(tid, inode, type, acl);
123 if (!rc) {
124 if (update_mode) {
125 inode->i_mode = mode;
126 inode->i_ctime = current_time(inode);
127 mark_inode_dirty(inode);
128 }
129 rc = txCommit(tid, 1, &inode, 0);
130 }
131end_tx:
132 txEnd(tid);
133 mutex_unlock(&JFS_IP(inode)->commit_mutex);
134 return rc;
135}
136
137int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
138{
139 struct posix_acl *default_acl, *acl;
140 int rc = 0;
141
142 rc = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
143 if (rc)
144 return rc;
145
146 if (default_acl) {
147 rc = __jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, default_acl);
148 posix_acl_release(default_acl);
149 }
150
151 if (acl) {
152 if (!rc)
153 rc = __jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl);
154 posix_acl_release(acl);
155 }
156
157 JFS_IP(inode)->mode2 = (JFS_IP(inode)->mode2 & 0xffff0000) |
158 inode->i_mode;
159
160 return rc;
161}
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(&init_user_ns, 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 switch (type) {
84 case ACL_TYPE_ACCESS:
85 ea_name = POSIX_ACL_XATTR_ACCESS;
86 rc = posix_acl_equiv_mode(acl, &inode->i_mode);
87 if (rc < 0)
88 return rc;
89 inode->i_ctime = CURRENT_TIME;
90 mark_inode_dirty(inode);
91 if (rc == 0)
92 acl = NULL;
93 break;
94 case ACL_TYPE_DEFAULT:
95 ea_name = POSIX_ACL_XATTR_DEFAULT;
96 break;
97 default:
98 return -EINVAL;
99 }
100
101 if (acl) {
102 size = posix_acl_xattr_size(acl->a_count);
103 value = kmalloc(size, GFP_KERNEL);
104 if (!value)
105 return -ENOMEM;
106 rc = posix_acl_to_xattr(&init_user_ns, acl, value, size);
107 if (rc < 0)
108 goto out;
109 }
110 rc = __jfs_setxattr(tid, inode, ea_name, value, size, 0);
111out:
112 kfree(value);
113
114 if (!rc)
115 set_cached_acl(inode, type, acl);
116
117 return rc;
118}
119
120int jfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
121{
122 int rc;
123 tid_t tid;
124
125 tid = txBegin(inode->i_sb, 0);
126 mutex_lock(&JFS_IP(inode)->commit_mutex);
127 rc = __jfs_set_acl(tid, inode, type, acl);
128 if (!rc)
129 rc = txCommit(tid, 1, &inode, 0);
130 txEnd(tid);
131 mutex_unlock(&JFS_IP(inode)->commit_mutex);
132 return rc;
133}
134
135int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
136{
137 struct posix_acl *default_acl, *acl;
138 int rc = 0;
139
140 rc = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
141 if (rc)
142 return rc;
143
144 if (default_acl) {
145 rc = __jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, default_acl);
146 posix_acl_release(default_acl);
147 }
148
149 if (acl) {
150 if (!rc)
151 rc = __jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl);
152 posix_acl_release(acl);
153 }
154
155 JFS_IP(inode)->mode2 = (JFS_IP(inode)->mode2 & 0xffff0000) |
156 inode->i_mode;
157
158 return rc;
159}