1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Copyright (C) International Business Machines Corp., 2000-2002
4 */
5
6#ifndef H_JFS_XATTR
7#define H_JFS_XATTR
8
9#include <linux/xattr.h>
10
11/*
12 * jfs_ea_list describe the on-disk format of the extended attributes.
13 * I know the null-terminator is redundant since namelen is stored, but
14 * I am maintaining compatibility with OS/2 where possible.
15 */
16struct jfs_ea {
17 u8 flag; /* Unused? */
18 u8 namelen; /* Length of name */
19 __le16 valuelen; /* Length of value */
20 char name[]; /* Attribute name (includes null-terminator) */
21}; /* Value immediately follows name */
22
23struct jfs_ea_list {
24 __le32 size; /* overall size */
25 struct jfs_ea ea[]; /* Variable length list */
26};
27
28/* Macros for defining maximum number of bytes supported for EAs */
29#define MAXEASIZE 65535
30#define MAXEALISTSIZE MAXEASIZE
31
32/*
33 * some macros for dealing with variable length EA lists.
34 */
35#define EA_SIZE(ea) \
36 (sizeof (struct jfs_ea) + (ea)->namelen + 1 + \
37 le16_to_cpu((ea)->valuelen))
38#define NEXT_EA(ea) ((struct jfs_ea *) (((char *) (ea)) + (EA_SIZE (ea))))
39#define FIRST_EA(ealist) ((ealist)->ea)
40#define EALIST_SIZE(ealist) le32_to_cpu((ealist)->size)
41#define END_EALIST(ealist) \
42 ((struct jfs_ea *) (((char *) (ealist)) + EALIST_SIZE(ealist)))
43
44extern int __jfs_setxattr(tid_t, struct inode *, const char *, const void *,
45 size_t, int);
46extern ssize_t __jfs_getxattr(struct inode *, const char *, void *, size_t);
47extern ssize_t jfs_listxattr(struct dentry *, char *, size_t);
48
49extern const struct xattr_handler * const jfs_xattr_handlers[];
50
51#ifdef CONFIG_JFS_SECURITY
52extern int jfs_init_security(tid_t, struct inode *, struct inode *,
53 const struct qstr *);
54#else
55static inline int jfs_init_security(tid_t tid, struct inode *inode,
56 struct inode *dir, const struct qstr *qstr)
57{
58 return 0;
59}
60#endif
61
62#endif /* H_JFS_XATTR */
63

source code of linux/fs/jfs/jfs_xattr.h