diff options
Diffstat (limited to 'fs/jffs2/xattr.h')
| -rw-r--r-- | fs/jffs2/xattr.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/fs/jffs2/xattr.h b/fs/jffs2/xattr.h new file mode 100644 index 000000000000..e2aa2394ab64 --- /dev/null +++ b/fs/jffs2/xattr.h | |||
| @@ -0,0 +1,116 @@ | |||
| 1 | /* | ||
| 2 | * JFFS2 -- Journalling Flash File System, Version 2. | ||
| 3 | * | ||
| 4 | * Copyright (C) 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 | #ifndef _JFFS2_FS_XATTR_H_ | ||
| 12 | #define _JFFS2_FS_XATTR_H_ | ||
| 13 | |||
| 14 | #include <linux/xattr.h> | ||
| 15 | #include <linux/list.h> | ||
| 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 | |||
| 41 | struct jffs2_inode_cache; | ||
| 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 | }; | ||
| 58 | struct jffs2_xattr_ref *next; /* chained from ic->xref_list */ | ||
| 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 | |||
| 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); | ||
| 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 | |||
| 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) | ||
| 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 | |||
| 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_ */ | ||