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652ecc20 KK |
1 | /* |
2 | * JFFS2 -- Journalling Flash File System, Version 2. | |
aa98d7cf | 3 | * |
652ecc20 | 4 | * Copyright (C) 2006 NEC Corporation |
aa98d7cf | 5 | * |
652ecc20 KK |
6 | * Created by KaiGai Kohei <kaigai@ak.jp.nec.com> |
7 | * | |
8 | * For licensing information, see the file 'LICENCE' in this directory. | |
9 | * | |
10 | */ | |
aa98d7cf KK |
11 | #ifndef _JFFS2_FS_XATTR_H_ |
12 | #define _JFFS2_FS_XATTR_H_ | |
13 | ||
14 | #include <linux/xattr.h> | |
4470d040 | 15 | #include <linux/list.h> |
aa98d7cf KK |
16 | |
17 | #define JFFS2_XFLAGS_HOT (0x01) /* This datum is HOT */ | |
18 | #define JFFS2_XFLAGS_BIND (0x02) /* This datum is not reclaimed */ | |
19 | ||
20 | struct jffs2_xattr_datum | |
21 | { | |
22 | void *always_null; | |
23 | u8 class; | |
24 | u8 flags; | |
25 | u16 xprefix; /* see JFFS2_XATTR_PREFIX_* */ | |
26 | ||
27 | struct jffs2_raw_node_ref *node; | |
28 | struct list_head xindex; /* chained from c->xattrindex[n] */ | |
29 | uint32_t refcnt; /* # of xattr_ref refers this */ | |
30 | uint32_t xid; | |
31 | uint32_t version; | |
32 | ||
33 | uint32_t data_crc; | |
34 | uint32_t hashkey; | |
35 | char *xname; /* XATTR name without prefix */ | |
36 | uint32_t name_len; /* length of xname */ | |
37 | char *xvalue; /* XATTR value */ | |
38 | uint32_t value_len; /* length of xvalue */ | |
39 | }; | |
40 | ||
ee886b5d | 41 | struct jffs2_inode_cache; |
aa98d7cf KK |
42 | struct jffs2_xattr_ref |
43 | { | |
44 | void *always_null; | |
45 | u8 class; | |
46 | u8 flags; /* Currently unused */ | |
47 | u16 unused; | |
48 | ||
49 | struct jffs2_raw_node_ref *node; | |
50 | union { | |
51 | struct jffs2_inode_cache *ic; /* reference to jffs2_inode_cache */ | |
52 | uint32_t ino; /* only used in scanning/building */ | |
53 | }; | |
54 | union { | |
55 | struct jffs2_xattr_datum *xd; /* reference to jffs2_xattr_datum */ | |
56 | uint32_t xid; /* only used in sccanning/building */ | |
57 | }; | |
8f2b6f49 | 58 | struct jffs2_xattr_ref *next; /* chained from ic->xref_list */ |
aa98d7cf KK |
59 | }; |
60 | ||
61 | #ifdef CONFIG_JFFS2_FS_XATTR | |
62 | ||
63 | extern void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c); | |
64 | extern void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c); | |
65 | extern void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c); | |
66 | ||
67 | extern struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c, | |
68 | uint32_t xid, uint32_t version); | |
69 | ||
70 | extern void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); | |
71 | extern void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); | |
72 | ||
084702e0 KK |
73 | extern int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd); |
74 | extern int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref); | |
aa98d7cf KK |
75 | extern int jffs2_verify_xattr(struct jffs2_sb_info *c); |
76 | ||
77 | extern int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname, | |
78 | char *buffer, size_t size); | |
79 | extern int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname, | |
80 | const char *buffer, size_t size, int flags); | |
81 | ||
82 | extern struct xattr_handler *jffs2_xattr_handlers[]; | |
83 | extern struct xattr_handler jffs2_user_xattr_handler; | |
84 | extern struct xattr_handler jffs2_trusted_xattr_handler; | |
85 | ||
86 | extern ssize_t jffs2_listxattr(struct dentry *, char *, size_t); | |
87 | #define jffs2_getxattr generic_getxattr | |
88 | #define jffs2_setxattr generic_setxattr | |
89 | #define jffs2_removexattr generic_removexattr | |
90 | ||
aa98d7cf KK |
91 | #else |
92 | ||
93 | #define jffs2_init_xattr_subsystem(c) | |
94 | #define jffs2_build_xattr_subsystem(c) | |
95 | #define jffs2_clear_xattr_subsystem(c) | |
96 | ||
97 | #define jffs2_xattr_delete_inode(c, ic) | |
98 | #define jffs2_xattr_free_inode(c, ic) | |
aa98d7cf KK |
99 | #define jffs2_verify_xattr(c) (1) |
100 | ||
101 | #define jffs2_xattr_handlers NULL | |
102 | #define jffs2_listxattr NULL | |
103 | #define jffs2_getxattr NULL | |
104 | #define jffs2_setxattr NULL | |
105 | #define jffs2_removexattr NULL | |
106 | ||
aa98d7cf KK |
107 | #endif /* CONFIG_JFFS2_FS_XATTR */ |
108 | ||
109 | #ifdef CONFIG_JFFS2_FS_SECURITY | |
110 | extern int jffs2_init_security(struct inode *inode, struct inode *dir); | |
111 | extern struct xattr_handler jffs2_security_xattr_handler; | |
112 | #else | |
113 | #define jffs2_init_security(inode,dir) (0) | |
114 | #endif /* CONFIG_JFFS2_FS_SECURITY */ | |
115 | ||
116 | #endif /* _JFFS2_FS_XATTR_H_ */ |