1 /*-------------------------------------------------------------------------*
2 * File: fs/jffs2/xattr.c
3 * XATTR support on JFFS2 FileSystem
5 * Implemented by KaiGai Kohei <kaigai@ak.jp.nec.com>
6 * Copyright (C) 2006 NEC Corporation
8 * For licensing information, see the file 'LICENCE' in the jffs2 directory.
9 *-------------------------------------------------------------------------*/
11 #ifndef _JFFS2_FS_XATTR_H_
12 #define _JFFS2_FS_XATTR_H_
14 #include <linux/xattr.h>
16 #define JFFS2_XFLAGS_HOT (0x01) /* This datum is HOT */
17 #define JFFS2_XFLAGS_BIND (0x02) /* This datum is not reclaimed */
19 struct jffs2_xattr_datum
24 u16 xprefix
; /* see JFFS2_XATTR_PREFIX_* */
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 */
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 */
40 struct jffs2_inode_cache
; /* forward refence */
41 struct jffs2_xattr_ref
45 u8 flags
; /* Currently unused */
48 struct jffs2_raw_node_ref
*node
;
50 struct jffs2_inode_cache
*ic
; /* reference to jffs2_inode_cache */
51 uint32_t ino
; /* only used in scanning/building */
54 struct jffs2_xattr_datum
*xd
; /* reference to jffs2_xattr_datum */
55 uint32_t xid
; /* only used in sccanning/building */
57 struct list_head ilist
; /* chained from ic->ilist */
60 #ifdef CONFIG_JFFS2_FS_XATTR
62 extern void jffs2_init_xattr_subsystem(struct jffs2_sb_info
*c
);
63 extern void jffs2_build_xattr_subsystem(struct jffs2_sb_info
*c
);
64 extern void jffs2_clear_xattr_subsystem(struct jffs2_sb_info
*c
);
66 extern struct jffs2_xattr_datum
*jffs2_setup_xattr_datum(struct jffs2_sb_info
*c
,
67 uint32_t xid
, uint32_t version
);
69 extern void jffs2_xattr_delete_inode(struct jffs2_sb_info
*c
, struct jffs2_inode_cache
*ic
);
70 extern void jffs2_xattr_free_inode(struct jffs2_sb_info
*c
, struct jffs2_inode_cache
*ic
);
72 extern int jffs2_garbage_collect_xattr(struct jffs2_sb_info
*c
, struct jffs2_inode_cache
*ic
);
73 extern int jffs2_verify_xattr(struct jffs2_sb_info
*c
);
75 extern int do_jffs2_getxattr(struct inode
*inode
, int xprefix
, const char *xname
,
76 char *buffer
, size_t size
);
77 extern int do_jffs2_setxattr(struct inode
*inode
, int xprefix
, const char *xname
,
78 const char *buffer
, size_t size
, int flags
);
80 extern struct xattr_handler
*jffs2_xattr_handlers
[];
81 extern struct xattr_handler jffs2_user_xattr_handler
;
82 extern struct xattr_handler jffs2_trusted_xattr_handler
;
84 extern 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
89 /*---- Any inline initialize functions ----*/
90 #define init_xattr_inode_cache(x) INIT_LIST_HEAD(&((x)->ilist))
94 #define jffs2_init_xattr_subsystem(c)
95 #define jffs2_build_xattr_subsystem(c)
96 #define jffs2_clear_xattr_subsystem(c)
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)
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
109 #define init_xattr_inode_cache(x)
111 #endif /* CONFIG_JFFS2_FS_XATTR */
113 #ifdef CONFIG_JFFS2_FS_SECURITY
114 extern int jffs2_init_security(struct inode
*inode
, struct inode
*dir
);
115 extern struct xattr_handler jffs2_security_xattr_handler
;
117 #define jffs2_init_security(inode,dir) (0)
118 #endif /* CONFIG_JFFS2_FS_SECURITY */
120 #endif /* _JFFS2_FS_XATTR_H_ */