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