2 * Copyright (C) International Business Machines Corp., 2002-2004
3 * Copyright (C) Andreas Gruenbacher, 2001
4 * Copyright (C) Linus Torvalds, 1991, 1992
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.
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.
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
21 #include <linux/sched.h>
23 #include <linux/quotaops.h>
24 #include <linux/posix_acl_xattr.h>
25 #include "jfs_incore.h"
26 #include "jfs_txnmgr.h"
27 #include "jfs_xattr.h"
30 static struct posix_acl
*jfs_get_acl(struct inode
*inode
, int type
)
32 struct posix_acl
*acl
;
37 acl
= get_cached_acl(inode
, type
);
38 if (acl
!= ACL_NOT_CACHED
)
43 ea_name
= POSIX_ACL_XATTR_ACCESS
;
45 case ACL_TYPE_DEFAULT
:
46 ea_name
= POSIX_ACL_XATTR_DEFAULT
;
49 return ERR_PTR(-EINVAL
);
52 size
= __jfs_getxattr(inode
, ea_name
, NULL
, 0);
55 value
= kmalloc(size
, GFP_KERNEL
);
57 return ERR_PTR(-ENOMEM
);
58 size
= __jfs_getxattr(inode
, ea_name
, value
, size
);
67 acl
= posix_acl_from_xattr(value
, size
);
71 set_cached_acl(inode
, type
, acl
);
72 posix_acl_release(acl
);
77 static int jfs_set_acl(tid_t tid
, struct inode
*inode
, int type
,
78 struct posix_acl
*acl
)
85 if (S_ISLNK(inode
->i_mode
))
90 ea_name
= POSIX_ACL_XATTR_ACCESS
;
92 case ACL_TYPE_DEFAULT
:
93 ea_name
= POSIX_ACL_XATTR_DEFAULT
;
94 if (!S_ISDIR(inode
->i_mode
))
95 return acl
? -EACCES
: 0;
101 size
= posix_acl_xattr_size(acl
->a_count
);
102 value
= kmalloc(size
, GFP_KERNEL
);
105 rc
= posix_acl_to_xattr(acl
, value
, size
);
109 rc
= __jfs_setxattr(tid
, inode
, ea_name
, value
, size
, 0);
114 set_cached_acl(inode
, type
, acl
);
119 static int jfs_check_acl(struct inode
*inode
, int mask
)
121 struct posix_acl
*acl
= jfs_get_acl(inode
, ACL_TYPE_ACCESS
);
126 int error
= posix_acl_permission(inode
, acl
, mask
);
127 posix_acl_release(acl
);
134 int jfs_permission(struct inode
*inode
, int mask
)
136 return generic_permission(inode
, mask
, jfs_check_acl
);
139 int jfs_init_acl(tid_t tid
, struct inode
*inode
, struct inode
*dir
)
141 struct posix_acl
*acl
= NULL
;
142 struct posix_acl
*clone
;
146 if (S_ISLNK(inode
->i_mode
))
149 acl
= jfs_get_acl(dir
, ACL_TYPE_DEFAULT
);
154 if (S_ISDIR(inode
->i_mode
)) {
155 rc
= jfs_set_acl(tid
, inode
, ACL_TYPE_DEFAULT
, acl
);
159 clone
= posix_acl_clone(acl
, GFP_KERNEL
);
164 mode
= inode
->i_mode
;
165 rc
= posix_acl_create_masq(clone
, &mode
);
167 inode
->i_mode
= mode
;
169 rc
= jfs_set_acl(tid
, inode
, ACL_TYPE_ACCESS
,
172 posix_acl_release(clone
);
174 posix_acl_release(acl
);
176 inode
->i_mode
&= ~current_umask();
178 JFS_IP(inode
)->mode2
= (JFS_IP(inode
)->mode2
& 0xffff0000) |
184 static int jfs_acl_chmod(struct inode
*inode
)
186 struct posix_acl
*acl
, *clone
;
189 if (S_ISLNK(inode
->i_mode
))
192 acl
= jfs_get_acl(inode
, ACL_TYPE_ACCESS
);
193 if (IS_ERR(acl
) || !acl
)
196 clone
= posix_acl_clone(acl
, GFP_KERNEL
);
197 posix_acl_release(acl
);
201 rc
= posix_acl_chmod_masq(clone
, inode
->i_mode
);
203 tid_t tid
= txBegin(inode
->i_sb
, 0);
204 mutex_lock(&JFS_IP(inode
)->commit_mutex
);
205 rc
= jfs_set_acl(tid
, inode
, ACL_TYPE_ACCESS
, clone
);
207 rc
= txCommit(tid
, 1, &inode
, 0);
209 mutex_unlock(&JFS_IP(inode
)->commit_mutex
);
212 posix_acl_release(clone
);
216 int jfs_setattr(struct dentry
*dentry
, struct iattr
*iattr
)
218 struct inode
*inode
= dentry
->d_inode
;
221 rc
= inode_change_ok(inode
, iattr
);
225 if ((iattr
->ia_valid
& ATTR_UID
&& iattr
->ia_uid
!= inode
->i_uid
) ||
226 (iattr
->ia_valid
& ATTR_GID
&& iattr
->ia_gid
!= inode
->i_gid
)) {
227 if (vfs_dq_transfer(inode
, iattr
))
231 rc
= inode_setattr(inode
, iattr
);
233 if (!rc
&& (iattr
->ia_valid
& ATTR_MODE
))
234 rc
= jfs_acl_chmod(inode
);
This page took 0.034835 seconds and 5 git commands to generate.