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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) International Business Machines Corp., 2002-2004
4 * Copyright (C) Andreas Gruenbacher, 2001
5 * Copyright (C) Linus Torvalds, 1991, 1992
6 */
7
8#include <linux/sched.h>
9#include <linux/slab.h>
10#include <linux/fs.h>
11#include <linux/posix_acl_xattr.h>
12#include "jfs_incore.h"
13#include "jfs_txnmgr.h"
14#include "jfs_xattr.h"
15#include "jfs_acl.h"
16
17struct posix_acl *jfs_get_acl(struct inode *inode, int type)
18{
19 struct posix_acl *acl;
20 char *ea_name;
21 int size;
22 char *value = NULL;
23
24 switch(type) {
25 case ACL_TYPE_ACCESS:
26 ea_name = XATTR_NAME_POSIX_ACL_ACCESS;
27 break;
28 case ACL_TYPE_DEFAULT:
29 ea_name = XATTR_NAME_POSIX_ACL_DEFAULT;
30 break;
31 default:
32 return ERR_PTR(-EINVAL);
33 }
34
35 size = __jfs_getxattr(inode, ea_name, NULL, 0);
36
37 if (size > 0) {
38 value = kmalloc(size, GFP_KERNEL);
39 if (!value)
40 return ERR_PTR(-ENOMEM);
41 size = __jfs_getxattr(inode, ea_name, value, size);
42 }
43
44 if (size < 0) {
45 if (size == -ENODATA)
46 acl = NULL;
47 else
48 acl = ERR_PTR(size);
49 } else {
50 acl = posix_acl_from_xattr(&init_user_ns, value, size);
51 }
52 kfree(value);
53 return acl;
54}
55
56static int __jfs_set_acl(tid_t tid, struct inode *inode, int type,
57 struct posix_acl *acl)
58{
59 char *ea_name;
60 int rc;
61 int size = 0;
62 char *value = NULL;
63
64 switch (type) {
65 case ACL_TYPE_ACCESS:
66 ea_name = XATTR_NAME_POSIX_ACL_ACCESS;
67 break;
68 case ACL_TYPE_DEFAULT:
69 ea_name = XATTR_NAME_POSIX_ACL_DEFAULT;
70 break;
71 default:
72 return -EINVAL;
73 }
74
75 if (acl) {
76 size = posix_acl_xattr_size(acl->a_count);
77 value = kmalloc(size, GFP_KERNEL);
78 if (!value)
79 return -ENOMEM;
80 rc = posix_acl_to_xattr(&init_user_ns, acl, value, size);
81 if (rc < 0)
82 goto out;
83 }
84 rc = __jfs_setxattr(tid, inode, ea_name, value, size, 0);
85out:
86 kfree(value);
87
88 if (!rc)
89 set_cached_acl(inode, type, acl);
90
91 return rc;
92}
93
94int jfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
95 struct posix_acl *acl, int type)
96{
97 int rc;
98 tid_t tid;
99 int update_mode = 0;
100 umode_t mode = inode->i_mode;
101
102 tid = txBegin(inode->i_sb, 0);
103 mutex_lock(&JFS_IP(inode)->commit_mutex);
104 if (type == ACL_TYPE_ACCESS && acl) {
105 rc = posix_acl_update_mode(&init_user_ns, inode, &mode, &acl);
106 if (rc)
107 goto end_tx;
108 if (mode != inode->i_mode)
109 update_mode = 1;
110 }
111 rc = __jfs_set_acl(tid, inode, type, acl);
112 if (!rc) {
113 if (update_mode) {
114 inode->i_mode = mode;
115 inode->i_ctime = current_time(inode);
116 mark_inode_dirty(inode);
117 }
118 rc = txCommit(tid, 1, &inode, 0);
119 }
120end_tx:
121 txEnd(tid);
122 mutex_unlock(&JFS_IP(inode)->commit_mutex);
123 return rc;
124}
125
126int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
127{
128 struct posix_acl *default_acl, *acl;
129 int rc = 0;
130
131 rc = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
132 if (rc)
133 return rc;
134
135 if (default_acl) {
136 rc = __jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, default_acl);
137 posix_acl_release(default_acl);
138 } else {
139 inode->i_default_acl = NULL;
140 }
141
142 if (acl) {
143 if (!rc)
144 rc = __jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl);
145 posix_acl_release(acl);
146 } else {
147 inode->i_acl = NULL;
148 }
149
150 JFS_IP(inode)->mode2 = (JFS_IP(inode)->mode2 & 0xffff0000) |
151 inode->i_mode;
152
153 return rc;
154}
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}