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