Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | |
63f83c9f | 8 | * the Free Software Foundation; either version 2 of the License, or |
1da177e4 | 9 | * (at your option) any later version. |
63f83c9f | 10 | * |
1da177e4 LT |
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 | |
63f83c9f | 17 | * along with this program; if not, write to the Free Software |
1da177e4 LT |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | */ | |
20 | ||
21 | #include <linux/sched.h> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
1da177e4 | 23 | #include <linux/fs.h> |
9a59f452 | 24 | #include <linux/posix_acl_xattr.h> |
1da177e4 | 25 | #include "jfs_incore.h" |
4f4b401b | 26 | #include "jfs_txnmgr.h" |
1da177e4 LT |
27 | #include "jfs_xattr.h" |
28 | #include "jfs_acl.h" | |
29 | ||
4e34e719 | 30 | struct posix_acl *jfs_get_acl(struct inode *inode, int type) |
1da177e4 LT |
31 | { |
32 | struct posix_acl *acl; | |
33 | char *ea_name; | |
1da177e4 LT |
34 | int size; |
35 | char *value = NULL; | |
36 | ||
073aaa1b AV |
37 | acl = get_cached_acl(inode, type); |
38 | if (acl != ACL_NOT_CACHED) | |
39 | return acl; | |
40 | ||
1da177e4 LT |
41 | switch(type) { |
42 | case ACL_TYPE_ACCESS: | |
9a59f452 | 43 | ea_name = POSIX_ACL_XATTR_ACCESS; |
1da177e4 LT |
44 | break; |
45 | case ACL_TYPE_DEFAULT: | |
9a59f452 | 46 | ea_name = POSIX_ACL_XATTR_DEFAULT; |
1da177e4 LT |
47 | break; |
48 | default: | |
49 | return ERR_PTR(-EINVAL); | |
50 | } | |
51 | ||
1da177e4 LT |
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) { | |
073aaa1b | 62 | if (size == -ENODATA) |
1da177e4 | 63 | acl = NULL; |
073aaa1b | 64 | else |
1da177e4 LT |
65 | acl = ERR_PTR(size); |
66 | } else { | |
67 | acl = posix_acl_from_xattr(value, size); | |
1da177e4 | 68 | } |
259692bd | 69 | kfree(value); |
4a19fb11 | 70 | if (!IS_ERR(acl)) |
073aaa1b | 71 | set_cached_acl(inode, type, acl); |
1da177e4 LT |
72 | return acl; |
73 | } | |
74 | ||
4f4b401b DK |
75 | static int jfs_set_acl(tid_t tid, struct inode *inode, int type, |
76 | struct posix_acl *acl) | |
1da177e4 LT |
77 | { |
78 | char *ea_name; | |
1da177e4 LT |
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: | |
9a59f452 | 88 | ea_name = POSIX_ACL_XATTR_ACCESS; |
1da177e4 LT |
89 | break; |
90 | case ACL_TYPE_DEFAULT: | |
9a59f452 | 91 | ea_name = POSIX_ACL_XATTR_DEFAULT; |
1da177e4 LT |
92 | if (!S_ISDIR(inode->i_mode)) |
93 | return acl ? -EACCES : 0; | |
94 | break; | |
95 | default: | |
96 | return -EINVAL; | |
97 | } | |
98 | if (acl) { | |
9a59f452 | 99 | size = posix_acl_xattr_size(acl->a_count); |
1da177e4 LT |
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 | } | |
4f4b401b | 107 | rc = __jfs_setxattr(tid, inode, ea_name, value, size, 0); |
1da177e4 | 108 | out: |
259692bd | 109 | kfree(value); |
1da177e4 | 110 | |
073aaa1b AV |
111 | if (!rc) |
112 | set_cached_acl(inode, type, acl); | |
113 | ||
1da177e4 LT |
114 | return rc; |
115 | } | |
116 | ||
4f4b401b | 117 | int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir) |
1da177e4 LT |
118 | { |
119 | struct posix_acl *acl = NULL; | |
1da177e4 LT |
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)) { | |
4f4b401b | 131 | rc = jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, acl); |
1da177e4 LT |
132 | if (rc) |
133 | goto cleanup; | |
134 | } | |
d3fb6120 | 135 | rc = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode); |
826cae2f AV |
136 | if (rc < 0) |
137 | goto cleanup; /* posix_acl_release(NULL) is no-op */ | |
826cae2f AV |
138 | if (rc > 0) |
139 | rc = jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl); | |
1da177e4 LT |
140 | cleanup: |
141 | posix_acl_release(acl); | |
142 | } else | |
ce3b0f8d | 143 | inode->i_mode &= ~current_umask(); |
63f83c9f | 144 | |
69eb66d7 DK |
145 | JFS_IP(inode)->mode2 = (JFS_IP(inode)->mode2 & 0xffff0000) | |
146 | inode->i_mode; | |
1da177e4 LT |
147 | |
148 | return rc; | |
149 | } | |
150 | ||
759bfee6 | 151 | int jfs_acl_chmod(struct inode *inode) |
1da177e4 | 152 | { |
bc26ab5f | 153 | struct posix_acl *acl; |
1da177e4 | 154 | int rc; |
bc26ab5f | 155 | tid_t tid; |
1da177e4 LT |
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 | ||
bc26ab5f AV |
164 | rc = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode); |
165 | if (rc) | |
166 | return rc; | |
1da177e4 | 167 | |
bc26ab5f AV |
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); | |
1da177e4 LT |
177 | return rc; |
178 | } |