1652ecc20SKaiGai Kohei /*
2652ecc20SKaiGai Kohei * JFFS2 -- Journalling Flash File System, Version 2.
3aa98d7cfSKaiGai Kohei *
4c00c310eSDavid Woodhouse * Copyright © 2006 NEC Corporation
5aa98d7cfSKaiGai Kohei *
6652ecc20SKaiGai Kohei * Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
7652ecc20SKaiGai Kohei *
8652ecc20SKaiGai Kohei * For licensing information, see the file 'LICENCE' in this directory.
9652ecc20SKaiGai Kohei *
10652ecc20SKaiGai Kohei */
11c00c310eSDavid Woodhouse
12aa98d7cfSKaiGai Kohei #ifndef _JFFS2_FS_XATTR_H_
13aa98d7cfSKaiGai Kohei #define _JFFS2_FS_XATTR_H_
14aa98d7cfSKaiGai Kohei
15aa98d7cfSKaiGai Kohei #include <linux/xattr.h>
164470d040SKaiGai Kohei #include <linux/list.h>
17aa98d7cfSKaiGai Kohei
18aa98d7cfSKaiGai Kohei #define JFFS2_XFLAGS_HOT (0x01) /* This datum is HOT */
19aa98d7cfSKaiGai Kohei #define JFFS2_XFLAGS_BIND (0x02) /* This datum is not reclaimed */
208a13695cSKaiGai Kohei #define JFFS2_XFLAGS_DEAD (0x40) /* This datum is already dead */
21c9f700f8SKaiGai Kohei #define JFFS2_XFLAGS_INVALID (0x80) /* This datum contains crc error */
22aa98d7cfSKaiGai Kohei
23aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum
24aa98d7cfSKaiGai Kohei {
25aa98d7cfSKaiGai Kohei void *always_null;
26aa98d7cfSKaiGai Kohei struct jffs2_raw_node_ref *node;
27987d47b7SDavid Woodhouse uint8_t class;
28987d47b7SDavid Woodhouse uint8_t flags;
29987d47b7SDavid Woodhouse uint16_t xprefix; /* see JFFS2_XATTR_PREFIX_* */
30987d47b7SDavid Woodhouse
31aa98d7cfSKaiGai Kohei struct list_head xindex; /* chained from c->xattrindex[n] */
322c887e23SKaiGai Kohei atomic_t refcnt; /* # of xattr_ref refers this */
33aa98d7cfSKaiGai Kohei uint32_t xid;
34aa98d7cfSKaiGai Kohei uint32_t version;
35aa98d7cfSKaiGai Kohei
36aa98d7cfSKaiGai Kohei uint32_t data_crc;
37aa98d7cfSKaiGai Kohei uint32_t hashkey;
38aa98d7cfSKaiGai Kohei char *xname; /* XATTR name without prefix */
39aa98d7cfSKaiGai Kohei uint32_t name_len; /* length of xname */
40aa98d7cfSKaiGai Kohei char *xvalue; /* XATTR value */
41aa98d7cfSKaiGai Kohei uint32_t value_len; /* length of xvalue */
42aa98d7cfSKaiGai Kohei };
43aa98d7cfSKaiGai Kohei
44ee886b5dSKaiGai Kohei struct jffs2_inode_cache;
45aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref
46aa98d7cfSKaiGai Kohei {
47aa98d7cfSKaiGai Kohei void *always_null;
48987d47b7SDavid Woodhouse struct jffs2_raw_node_ref *node;
49987d47b7SDavid Woodhouse uint8_t class;
50987d47b7SDavid Woodhouse uint8_t flags; /* Currently unused */
51aa98d7cfSKaiGai Kohei u16 unused;
52aa98d7cfSKaiGai Kohei
53c9f700f8SKaiGai Kohei uint32_t xseqno;
54aa98d7cfSKaiGai Kohei union {
55aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic; /* reference to jffs2_inode_cache */
56aa98d7cfSKaiGai Kohei uint32_t ino; /* only used in scanning/building */
57aa98d7cfSKaiGai Kohei };
58aa98d7cfSKaiGai Kohei union {
59aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; /* reference to jffs2_xattr_datum */
60aa98d7cfSKaiGai Kohei uint32_t xid; /* only used in sccanning/building */
61aa98d7cfSKaiGai Kohei };
628f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *next; /* chained from ic->xref_list */
63aa98d7cfSKaiGai Kohei };
64aa98d7cfSKaiGai Kohei
65c9f700f8SKaiGai Kohei #define XREF_DELETE_MARKER (0x00000001)
is_xattr_ref_dead(struct jffs2_xattr_ref * ref)66c9f700f8SKaiGai Kohei static inline int is_xattr_ref_dead(struct jffs2_xattr_ref *ref)
67c9f700f8SKaiGai Kohei {
68c9f700f8SKaiGai Kohei return ((ref->xseqno & XREF_DELETE_MARKER) != 0);
69c9f700f8SKaiGai Kohei }
70c9f700f8SKaiGai Kohei
71aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR
72aa98d7cfSKaiGai Kohei
73aa98d7cfSKaiGai Kohei extern void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c);
74*1168f095SFabian Frederick extern int jffs2_build_xattr_subsystem(struct jffs2_sb_info *c);
75aa98d7cfSKaiGai Kohei extern void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c);
76aa98d7cfSKaiGai Kohei
77aa98d7cfSKaiGai Kohei extern struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c,
78aa98d7cfSKaiGai Kohei uint32_t xid, uint32_t version);
79aa98d7cfSKaiGai Kohei
808c5a0366SJean-Christophe DUBOIS extern void jffs2_xattr_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
81aa98d7cfSKaiGai Kohei extern void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
82aa98d7cfSKaiGai Kohei extern void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
83aa98d7cfSKaiGai Kohei
84c9f700f8SKaiGai Kohei extern int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd,
85c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw);
86c9f700f8SKaiGai Kohei extern int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref,
87c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw);
88aa98d7cfSKaiGai Kohei extern int jffs2_verify_xattr(struct jffs2_sb_info *c);
89c9f700f8SKaiGai Kohei extern void jffs2_release_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd);
90c9f700f8SKaiGai Kohei extern void jffs2_release_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref);
91aa98d7cfSKaiGai Kohei
92aa98d7cfSKaiGai Kohei extern int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname,
93aa98d7cfSKaiGai Kohei char *buffer, size_t size);
94aa98d7cfSKaiGai Kohei extern int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname,
95aa98d7cfSKaiGai Kohei const char *buffer, size_t size, int flags);
96aa98d7cfSKaiGai Kohei
97365f0cb9SStephen Hemminger extern const struct xattr_handler *jffs2_xattr_handlers[];
98365f0cb9SStephen Hemminger extern const struct xattr_handler jffs2_user_xattr_handler;
99365f0cb9SStephen Hemminger extern const struct xattr_handler jffs2_trusted_xattr_handler;
100aa98d7cfSKaiGai Kohei
101aa98d7cfSKaiGai Kohei extern ssize_t jffs2_listxattr(struct dentry *, char *, size_t);
102aa98d7cfSKaiGai Kohei
103aa98d7cfSKaiGai Kohei #else
104aa98d7cfSKaiGai Kohei
105aa98d7cfSKaiGai Kohei #define jffs2_init_xattr_subsystem(c)
106*1168f095SFabian Frederick #define jffs2_build_xattr_subsystem(c) (0)
107aa98d7cfSKaiGai Kohei #define jffs2_clear_xattr_subsystem(c)
108aa98d7cfSKaiGai Kohei
1098c5a0366SJean-Christophe DUBOIS #define jffs2_xattr_do_crccheck_inode(c, ic)
110aa98d7cfSKaiGai Kohei #define jffs2_xattr_delete_inode(c, ic)
111aa98d7cfSKaiGai Kohei #define jffs2_xattr_free_inode(c, ic)
112aa98d7cfSKaiGai Kohei #define jffs2_verify_xattr(c) (1)
113aa98d7cfSKaiGai Kohei
114aa98d7cfSKaiGai Kohei #define jffs2_xattr_handlers NULL
115aa98d7cfSKaiGai Kohei #define jffs2_listxattr NULL
116aa98d7cfSKaiGai Kohei
117aa98d7cfSKaiGai Kohei #endif /* CONFIG_JFFS2_FS_XATTR */
118aa98d7cfSKaiGai Kohei
119aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_SECURITY
1202a7dba39SEric Paris extern int jffs2_init_security(struct inode *inode, struct inode *dir,
1212a7dba39SEric Paris const struct qstr *qstr);
122365f0cb9SStephen Hemminger extern const struct xattr_handler jffs2_security_xattr_handler;
123aa98d7cfSKaiGai Kohei #else
1242a7dba39SEric Paris #define jffs2_init_security(inode,dir,qstr) (0)
125aa98d7cfSKaiGai Kohei #endif /* CONFIG_JFFS2_FS_SECURITY */
126aa98d7cfSKaiGai Kohei
127aa98d7cfSKaiGai Kohei #endif /* _JFFS2_FS_XATTR_H_ */
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