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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Dave Kleikamp63f83c92006-10-02 09:55:27 -05002 * Copyright (C) International Business Machines Corp., 2000-2002
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
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/*
23 * jfs_ea_list describe the on-disk format of the extended attributes.
24 * I know the null-terminator is redundant since namelen is stored, but
25 * I am maintaining compatibility with OS/2 where possible.
26 */
27struct jfs_ea {
28 u8 flag; /* Unused? */
29 u8 namelen; /* Length of name */
30 __le16 valuelen; /* Length of value */
31 char name[0]; /* Attribute name (includes null-terminator) */
32}; /* Value immediately follows name */
33
34struct jfs_ea_list {
35 __le32 size; /* overall size */
36 struct jfs_ea ea[0]; /* Variable length list */
37};
38
39/* Macros for defining maxiumum number of bytes supported for EAs */
40#define MAXEASIZE 65535
41#define MAXEALISTSIZE MAXEASIZE
42
43/*
44 * some macros for dealing with variable length EA lists.
45 */
46#define EA_SIZE(ea) \
47 (sizeof (struct jfs_ea) + (ea)->namelen + 1 + \
48 le16_to_cpu((ea)->valuelen))
49#define NEXT_EA(ea) ((struct jfs_ea *) (((char *) (ea)) + (EA_SIZE (ea))))
50#define FIRST_EA(ealist) ((ealist)->ea)
51#define EALIST_SIZE(ealist) le32_to_cpu((ealist)->size)
52#define END_EALIST(ealist) \
53 ((struct jfs_ea *) (((char *) (ealist)) + EALIST_SIZE(ealist)))
54
Dave Kleikamp4f4b4012005-09-01 09:02:43 -050055extern int __jfs_setxattr(tid_t, struct inode *, const char *, const void *,
56 size_t, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -070057extern int jfs_setxattr(struct dentry *, const char *, const void *, size_t,
58 int);
59extern ssize_t __jfs_getxattr(struct inode *, const char *, void *, size_t);
60extern ssize_t jfs_getxattr(struct dentry *, const char *, void *, size_t);
61extern ssize_t jfs_listxattr(struct dentry *, char *, size_t);
62extern int jfs_removexattr(struct dentry *, const char *);
63
Christoph Hellwig2cc6a5a2013-12-20 05:16:51 -080064extern const struct xattr_handler *jfs_xattr_handlers[];
65
Dave Kleikamp1d15b10f2005-09-01 09:05:39 -050066#ifdef CONFIG_JFS_SECURITY
Eric Paris2a7dba32011-02-01 11:05:39 -050067extern int jfs_init_security(tid_t, struct inode *, struct inode *,
68 const struct qstr *);
Dave Kleikamp1d15b10f2005-09-01 09:05:39 -050069#else
70static inline int jfs_init_security(tid_t tid, struct inode *inode,
Eric Paris2a7dba32011-02-01 11:05:39 -050071 struct inode *dir, const struct qstr *qstr)
Dave Kleikamp1d15b10f2005-09-01 09:05:39 -050072{
73 return 0;
74}
75#endif
76
Linus Torvalds1da177e2005-04-16 15:20:36 -070077#endif /* H_JFS_XATTR */