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 struct jffs2_raw_node_ref *node; 24 uint8_t class; 25 uint8_t flags; 26 uint16_t xprefix; /* see JFFS2_XATTR_PREFIX_* */ 27 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 struct jffs2_raw_node_ref *node; 46 uint8_t class; 47 uint8_t flags; /* Currently unused */ 48 u16 unused; 49 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_ */ 117