1 /*
2 * Copyright (C) International Business Machines Corp., 2000-2002
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
12 * the GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18
19 #ifndef H_JFS_XATTR
20 #define H_JFS_XATTR
21
22 #include <linux/xattr.h>
23
24 /*
25 * jfs_ea_list describe the on-disk format of the extended attributes.
26 * I know the null-terminator is redundant since namelen is stored, but
27 * I am maintaining compatibility with OS/2 where possible.
28 */
29 struct jfs_ea {
30 u8 flag; /* Unused? */
31 u8 namelen; /* Length of name */
32 __le16 valuelen; /* Length of value */
33 char name[0]; /* Attribute name (includes null-terminator) */
34 }; /* Value immediately follows name */
35
36 struct jfs_ea_list {
37 __le32 size; /* overall size */
38 struct jfs_ea ea[0]; /* Variable length list */
39 };
40
41 /* Macros for defining maxiumum number of bytes supported for EAs */
42 #define MAXEASIZE 65535
43 #define MAXEALISTSIZE MAXEASIZE
44
45 /*
46 * some macros for dealing with variable length EA lists.
47 */
48 #define EA_SIZE(ea) \
49 (sizeof (struct jfs_ea) + (ea)->namelen + 1 + \
50 le16_to_cpu((ea)->valuelen))
51 #define NEXT_EA(ea) ((struct jfs_ea *) (((char *) (ea)) + (EA_SIZE (ea))))
52 #define FIRST_EA(ealist) ((ealist)->ea)
53 #define EALIST_SIZE(ealist) le32_to_cpu((ealist)->size)
54 #define END_EALIST(ealist) \
55 ((struct jfs_ea *) (((char *) (ealist)) + EALIST_SIZE(ealist)))
56
57 extern int __jfs_setxattr(tid_t, struct inode *, const char *, const void *,
58 size_t, int);
59 extern ssize_t __jfs_getxattr(struct inode *, const char *, void *, size_t);
60 extern ssize_t jfs_listxattr(struct dentry *, char *, size_t);
61
62 extern const struct xattr_handler *jfs_xattr_handlers[];
63
64 #ifdef CONFIG_JFS_SECURITY
65 extern int jfs_init_security(tid_t, struct inode *, struct inode *,
66 const struct qstr *);
67 #else
jfs_init_security(tid_t tid,struct inode * inode,struct inode * dir,const struct qstr * qstr)68 static inline int jfs_init_security(tid_t tid, struct inode *inode,
69 struct inode *dir, const struct qstr *qstr)
70 {
71 return 0;
72 }
73 #endif
74
75 #endif /* H_JFS_XATTR */
76