1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) International Business Machines Corp., 2000-2002
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #ifndef H_JFS_XATTR
7*4882a593Smuzhiyun #define H_JFS_XATTR
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/xattr.h>
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun /*
12*4882a593Smuzhiyun * jfs_ea_list describe the on-disk format of the extended attributes.
13*4882a593Smuzhiyun * I know the null-terminator is redundant since namelen is stored, but
14*4882a593Smuzhiyun * I am maintaining compatibility with OS/2 where possible.
15*4882a593Smuzhiyun */
16*4882a593Smuzhiyun struct jfs_ea {
17*4882a593Smuzhiyun u8 flag; /* Unused? */
18*4882a593Smuzhiyun u8 namelen; /* Length of name */
19*4882a593Smuzhiyun __le16 valuelen; /* Length of value */
20*4882a593Smuzhiyun char name[]; /* Attribute name (includes null-terminator) */
21*4882a593Smuzhiyun }; /* Value immediately follows name */
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun struct jfs_ea_list {
24*4882a593Smuzhiyun __le32 size; /* overall size */
25*4882a593Smuzhiyun struct jfs_ea ea[]; /* Variable length list */
26*4882a593Smuzhiyun };
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun /* Macros for defining maxiumum number of bytes supported for EAs */
29*4882a593Smuzhiyun #define MAXEASIZE 65535
30*4882a593Smuzhiyun #define MAXEALISTSIZE MAXEASIZE
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun /*
33*4882a593Smuzhiyun * some macros for dealing with variable length EA lists.
34*4882a593Smuzhiyun */
35*4882a593Smuzhiyun #define EA_SIZE(ea) \
36*4882a593Smuzhiyun (sizeof (struct jfs_ea) + (ea)->namelen + 1 + \
37*4882a593Smuzhiyun le16_to_cpu((ea)->valuelen))
38*4882a593Smuzhiyun #define NEXT_EA(ea) ((struct jfs_ea *) (((char *) (ea)) + (EA_SIZE (ea))))
39*4882a593Smuzhiyun #define FIRST_EA(ealist) ((ealist)->ea)
40*4882a593Smuzhiyun #define EALIST_SIZE(ealist) le32_to_cpu((ealist)->size)
41*4882a593Smuzhiyun #define END_EALIST(ealist) \
42*4882a593Smuzhiyun ((struct jfs_ea *) (((char *) (ealist)) + EALIST_SIZE(ealist)))
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun extern int __jfs_setxattr(tid_t, struct inode *, const char *, const void *,
45*4882a593Smuzhiyun size_t, int);
46*4882a593Smuzhiyun extern ssize_t __jfs_getxattr(struct inode *, const char *, void *, size_t);
47*4882a593Smuzhiyun extern ssize_t jfs_listxattr(struct dentry *, char *, size_t);
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun extern const struct xattr_handler *jfs_xattr_handlers[];
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun #ifdef CONFIG_JFS_SECURITY
52*4882a593Smuzhiyun extern int jfs_init_security(tid_t, struct inode *, struct inode *,
53*4882a593Smuzhiyun const struct qstr *);
54*4882a593Smuzhiyun #else
jfs_init_security(tid_t tid,struct inode * inode,struct inode * dir,const struct qstr * qstr)55*4882a593Smuzhiyun static inline int jfs_init_security(tid_t tid, struct inode *inode,
56*4882a593Smuzhiyun struct inode *dir, const struct qstr *qstr)
57*4882a593Smuzhiyun {
58*4882a593Smuzhiyun return 0;
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun #endif
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun #endif /* H_JFS_XATTR */
63