source: rtems/cpukit/libfs/src/jffs2/src/xattr.h

Last change on this file was 976af92, checked in by Andreas Gruenbacher <agruenba@…>, on 09/29/16 at 15:48:31

jffs2: Remove jffs2_{get,set,remove}xattr macros

When CONFIG_JFFS2_FS_XATTR is off, jffs2_xattr_handlers is defined as
NULL. With sb->s_xattr == NULL, the generic_{get,set,remove}xattr
functions produce the same result as setting the {get,set,remove}xattr
inode operations to NULL, so there is no need for these macros.

Signed-off-by: Andreas Gruenbacher <agruenba@…>
Signed-off-by: Al Viro <viro@…>
  • Property mode set to 100644
File size: 4.1 KB
Line 
1/*
2 * JFFS2 -- Journalling Flash File System, Version 2.
3 *
4 * Copyright © 2006  NEC Corporation
5 *
6 * Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
7 *
8 * For licensing information, see the file 'LICENCE' in this directory.
9 *
10 */
11
12#ifndef _JFFS2_FS_XATTR_H_
13#define _JFFS2_FS_XATTR_H_
14
15#include <linux/xattr.h>
16#include <linux/list.h>
17
18#define JFFS2_XFLAGS_HOT        (0x01)  /* This datum is HOT */
19#define JFFS2_XFLAGS_BIND       (0x02)  /* This datum is not reclaimed */
20#define JFFS2_XFLAGS_DEAD       (0x40)  /* This datum is already dead */
21#define JFFS2_XFLAGS_INVALID    (0x80)  /* This datum contains crc error */
22
23struct jffs2_xattr_datum
24{
25        void *always_null;
26        struct jffs2_raw_node_ref *node;
27        uint8_t class;
28        uint8_t flags;
29        uint16_t xprefix;               /* see JFFS2_XATTR_PREFIX_* */
30
31        struct list_head xindex;        /* chained from c->xattrindex[n] */
32        atomic_t refcnt;                /* # of xattr_ref refers this */
33        uint32_t xid;
34        uint32_t version;
35
36        uint32_t data_crc;
37        uint32_t hashkey;
38        char *xname;            /* XATTR name without prefix */
39        uint32_t name_len;      /* length of xname */
40        char *xvalue;           /* XATTR value */
41        uint32_t value_len;     /* length of xvalue */
42};
43
44struct jffs2_inode_cache;
45struct jffs2_xattr_ref
46{
47        void *always_null;
48        struct jffs2_raw_node_ref *node;
49        uint8_t class;
50        uint8_t flags;          /* Currently unused */
51        u16 unused;
52
53        uint32_t xseqno;
54        union {
55                struct jffs2_inode_cache *ic;   /* reference to jffs2_inode_cache */
56                uint32_t ino;                   /* only used in scanning/building  */
57        };
58        union {
59                struct jffs2_xattr_datum *xd;   /* reference to jffs2_xattr_datum */
60                uint32_t xid;                   /* only used in sccanning/building */
61        };
62        struct jffs2_xattr_ref *next;           /* chained from ic->xref_list */
63};
64
65#define XREF_DELETE_MARKER      (0x00000001)
66static inline int is_xattr_ref_dead(struct jffs2_xattr_ref *ref)
67{
68        return ((ref->xseqno & XREF_DELETE_MARKER) != 0);
69}
70
71#ifdef CONFIG_JFFS2_FS_XATTR
72
73extern void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c);
74extern void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c);
75extern void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c);
76
77extern struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c,
78                                                         uint32_t xid, uint32_t version);
79
80extern void jffs2_xattr_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
81extern void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
82extern void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
83
84extern int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd,
85                                             struct jffs2_raw_node_ref *raw);
86extern int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref,
87                                           struct jffs2_raw_node_ref *raw);
88extern int jffs2_verify_xattr(struct jffs2_sb_info *c);
89extern void jffs2_release_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd);
90extern void jffs2_release_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref);
91
92extern int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname,
93                             char *buffer, size_t size);
94extern int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname,
95                             const char *buffer, size_t size, int flags);
96
97extern const struct xattr_handler *jffs2_xattr_handlers[];
98extern const struct xattr_handler jffs2_user_xattr_handler;
99extern const struct xattr_handler jffs2_trusted_xattr_handler;
100
101extern ssize_t jffs2_listxattr(struct dentry *, char *, size_t);
102
103#else
104
105#define jffs2_init_xattr_subsystem(c)
106#define jffs2_build_xattr_subsystem(c)
107#define jffs2_clear_xattr_subsystem(c)
108
109#define jffs2_xattr_do_crccheck_inode(c, ic)
110#define jffs2_xattr_delete_inode(c, ic)
111#define jffs2_xattr_free_inode(c, ic)
112#define jffs2_verify_xattr(c)                   (1)
113
114#define jffs2_xattr_handlers    NULL
115#define jffs2_listxattr         NULL
116
117#endif /* CONFIG_JFFS2_FS_XATTR */
118
119#ifdef CONFIG_JFFS2_FS_SECURITY
120extern int jffs2_init_security(struct inode *inode, struct inode *dir,
121                               const struct qstr *qstr);
122extern const struct xattr_handler jffs2_security_xattr_handler;
123#else
124#define jffs2_init_security(inode,dir,qstr)     (0)
125#endif /* CONFIG_JFFS2_FS_SECURITY */
126
127#endif /* _JFFS2_FS_XATTR_H_ */
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