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-rw-r--r--fs/jffs2/xattr.h120
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diff --git a/fs/jffs2/xattr.h b/fs/jffs2/xattr.h
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1/*-------------------------------------------------------------------------*
2 * File: fs/jffs2/xattr.c
3 * XATTR support on JFFS2 FileSystem
4 *
5 * Implemented by KaiGai Kohei <kaigai@ak.jp.nec.com>
6 * Copyright (C) 2006 NEC Corporation
7 *
8 * For licensing information, see the file 'LICENCE' in the jffs2 directory.
9 *-------------------------------------------------------------------------*/
10
11#ifndef _JFFS2_FS_XATTR_H_
12#define _JFFS2_FS_XATTR_H_
13
14#include <linux/xattr.h>
15
16#define JFFS2_XFLAGS_HOT (0x01) /* This datum is HOT */
17#define JFFS2_XFLAGS_BIND (0x02) /* This datum is not reclaimed */
18
19struct jffs2_xattr_datum
20{
21 void *always_null;
22 u8 class;
23 u8 flags;
24 u16 xprefix; /* see JFFS2_XATTR_PREFIX_* */
25
26 struct jffs2_raw_node_ref *node;
27 struct list_head xindex; /* chained from c->xattrindex[n] */
28 uint32_t refcnt; /* # of xattr_ref refers this */
29 uint32_t xid;
30 uint32_t version;
31
32 uint32_t data_crc;
33 uint32_t hashkey;
34 char *xname; /* XATTR name without prefix */
35 uint32_t name_len; /* length of xname */
36 char *xvalue; /* XATTR value */
37 uint32_t value_len; /* length of xvalue */
38};
39
40struct jffs2_inode_cache; /* forward refence */
41struct jffs2_xattr_ref
42{
43 void *always_null;
44 u8 class;
45 u8 flags; /* Currently unused */
46 u16 unused;
47
48 struct jffs2_raw_node_ref *node;
49 union {
50 struct jffs2_inode_cache *ic; /* reference to jffs2_inode_cache */
51 uint32_t ino; /* only used in scanning/building */
52 };
53 union {
54 struct jffs2_xattr_datum *xd; /* reference to jffs2_xattr_datum */
55 uint32_t xid; /* only used in sccanning/building */
56 };
57 struct list_head ilist; /* chained from ic->ilist */
58};
59
60#ifdef CONFIG_JFFS2_FS_XATTR
61
62extern void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c);
63extern void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c);
64extern void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c);
65
66extern struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c,
67 uint32_t xid, uint32_t version);
68
69extern void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
70extern void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
71
72extern int jffs2_garbage_collect_xattr(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
73extern int jffs2_verify_xattr(struct jffs2_sb_info *c);
74
75extern int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname,
76 char *buffer, size_t size);
77extern int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname,
78 const char *buffer, size_t size, int flags);
79
80extern struct xattr_handler *jffs2_xattr_handlers[];
81extern struct xattr_handler jffs2_user_xattr_handler;
82extern struct xattr_handler jffs2_trusted_xattr_handler;
83
84extern ssize_t jffs2_listxattr(struct dentry *, char *, size_t);
85#define jffs2_getxattr generic_getxattr
86#define jffs2_setxattr generic_setxattr
87#define jffs2_removexattr generic_removexattr
88
89/*---- Any inline initialize functions ----*/
90#define init_xattr_inode_cache(x) INIT_LIST_HEAD(&((x)->ilist))
91
92#else
93
94#define jffs2_init_xattr_subsystem(c)
95#define jffs2_build_xattr_subsystem(c)
96#define jffs2_clear_xattr_subsystem(c)
97
98#define jffs2_xattr_delete_inode(c, ic)
99#define jffs2_xattr_free_inode(c, ic)
100#define jffs2_garbage_collect_xattr(c, ic) (1)
101#define jffs2_verify_xattr(c) (1)
102
103#define jffs2_xattr_handlers NULL
104#define jffs2_listxattr NULL
105#define jffs2_getxattr NULL
106#define jffs2_setxattr NULL
107#define jffs2_removexattr NULL
108
109#define init_xattr_inode_cache(x)
110
111#endif /* CONFIG_JFFS2_FS_XATTR */
112
113#ifdef CONFIG_JFFS2_FS_SECURITY
114extern int jffs2_init_security(struct inode *inode, struct inode *dir);
115extern struct xattr_handler jffs2_security_xattr_handler;
116#else
117#define jffs2_init_security(inode,dir) (0)
118#endif /* CONFIG_JFFS2_FS_SECURITY */
119
120#endif /* _JFFS2_FS_XATTR_H_ */