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);