1652ecc20SKaiGai Kohei /* 2652ecc20SKaiGai Kohei * JFFS2 -- Journalling Flash File System, Version 2. 3aa98d7cfSKaiGai Kohei * 4aa98d7cfSKaiGai Kohei * Copyright (C) 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 */ 11aa98d7cfSKaiGai Kohei #ifndef _JFFS2_FS_XATTR_H_ 12aa98d7cfSKaiGai Kohei #define _JFFS2_FS_XATTR_H_ 13aa98d7cfSKaiGai Kohei 14aa98d7cfSKaiGai Kohei #include <linux/xattr.h> 154470d040SKaiGai Kohei #include <linux/list.h> 16aa98d7cfSKaiGai Kohei 17aa98d7cfSKaiGai Kohei #define JFFS2_XFLAGS_HOT (0x01) /* This datum is HOT */ 18aa98d7cfSKaiGai Kohei #define JFFS2_XFLAGS_BIND (0x02) /* This datum is not reclaimed */ 19c9f700f8SKaiGai Kohei #define JFFS2_XFLAGS_INVALID (0x80) /* This datum contains crc error */ 20aa98d7cfSKaiGai Kohei 21aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum 22aa98d7cfSKaiGai Kohei { 23aa98d7cfSKaiGai Kohei void *always_null; 24aa98d7cfSKaiGai Kohei struct jffs2_raw_node_ref *node; 25987d47b7SDavid Woodhouse uint8_t class; 26987d47b7SDavid Woodhouse uint8_t flags; 27987d47b7SDavid Woodhouse uint16_t xprefix; /* see JFFS2_XATTR_PREFIX_* */ 28987d47b7SDavid Woodhouse 29aa98d7cfSKaiGai Kohei struct list_head xindex; /* chained from c->xattrindex[n] */ 30aa98d7cfSKaiGai Kohei uint32_t refcnt; /* # of xattr_ref refers this */ 31aa98d7cfSKaiGai Kohei uint32_t xid; 32aa98d7cfSKaiGai Kohei uint32_t version; 33aa98d7cfSKaiGai Kohei 34aa98d7cfSKaiGai Kohei uint32_t data_crc; 35aa98d7cfSKaiGai Kohei uint32_t hashkey; 36aa98d7cfSKaiGai Kohei char *xname; /* XATTR name without prefix */ 37aa98d7cfSKaiGai Kohei uint32_t name_len; /* length of xname */ 38aa98d7cfSKaiGai Kohei char *xvalue; /* XATTR value */ 39aa98d7cfSKaiGai Kohei uint32_t value_len; /* length of xvalue */ 40aa98d7cfSKaiGai Kohei }; 41aa98d7cfSKaiGai Kohei 42ee886b5dSKaiGai Kohei struct jffs2_inode_cache; 43aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref 44aa98d7cfSKaiGai Kohei { 45aa98d7cfSKaiGai Kohei void *always_null; 46987d47b7SDavid Woodhouse struct jffs2_raw_node_ref *node; 47987d47b7SDavid Woodhouse uint8_t class; 48987d47b7SDavid Woodhouse uint8_t flags; /* Currently unused */ 49aa98d7cfSKaiGai Kohei u16 unused; 50aa98d7cfSKaiGai Kohei 51c9f700f8SKaiGai Kohei uint32_t xseqno; 52aa98d7cfSKaiGai Kohei union { 53aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic; /* reference to jffs2_inode_cache */ 54aa98d7cfSKaiGai Kohei uint32_t ino; /* only used in scanning/building */ 55aa98d7cfSKaiGai Kohei }; 56aa98d7cfSKaiGai Kohei union { 57aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; /* reference to jffs2_xattr_datum */ 58aa98d7cfSKaiGai Kohei uint32_t xid; /* only used in sccanning/building */ 59aa98d7cfSKaiGai Kohei }; 608f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *next; /* chained from ic->xref_list */ 61aa98d7cfSKaiGai Kohei }; 62aa98d7cfSKaiGai Kohei 63c9f700f8SKaiGai Kohei #define XDATUM_DELETE_MARKER (0xffffffff) 64c9f700f8SKaiGai Kohei #define XREF_DELETE_MARKER (0x00000001) 65c9f700f8SKaiGai Kohei static inline int is_xattr_datum_dead(struct jffs2_xattr_datum *xd) 66c9f700f8SKaiGai Kohei { 67c9f700f8SKaiGai Kohei return (xd->version == XDATUM_DELETE_MARKER); 68c9f700f8SKaiGai Kohei } 69c9f700f8SKaiGai Kohei 70c9f700f8SKaiGai Kohei static inline void set_xattr_datum_dead(struct jffs2_xattr_datum *xd) 71c9f700f8SKaiGai Kohei { 72c9f700f8SKaiGai Kohei xd->version = XDATUM_DELETE_MARKER; 73c9f700f8SKaiGai Kohei } 74c9f700f8SKaiGai Kohei 75c9f700f8SKaiGai Kohei static inline int is_xattr_ref_dead(struct jffs2_xattr_ref *ref) 76c9f700f8SKaiGai Kohei { 77c9f700f8SKaiGai Kohei return ((ref->xseqno & XREF_DELETE_MARKER) != 0); 78c9f700f8SKaiGai Kohei } 79c9f700f8SKaiGai Kohei 80c9f700f8SKaiGai Kohei static inline void set_xattr_ref_dead(struct jffs2_xattr_ref *ref) 81c9f700f8SKaiGai Kohei { 82c9f700f8SKaiGai Kohei ref->xseqno |= XREF_DELETE_MARKER; 83c9f700f8SKaiGai Kohei } 84c9f700f8SKaiGai Kohei 85c9f700f8SKaiGai Kohei static inline void clr_xattr_ref_dead(struct jffs2_xattr_ref *ref) 86c9f700f8SKaiGai Kohei { 87c9f700f8SKaiGai Kohei ref->xseqno &= ~XREF_DELETE_MARKER; 88c9f700f8SKaiGai Kohei } 89c9f700f8SKaiGai Kohei 90c9f700f8SKaiGai Kohei 91aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 92aa98d7cfSKaiGai Kohei 93aa98d7cfSKaiGai Kohei extern void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c); 94aa98d7cfSKaiGai Kohei extern void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c); 95aa98d7cfSKaiGai Kohei extern void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c); 96aa98d7cfSKaiGai Kohei 97aa98d7cfSKaiGai Kohei extern struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c, 98aa98d7cfSKaiGai Kohei uint32_t xid, uint32_t version); 99aa98d7cfSKaiGai Kohei 100aa98d7cfSKaiGai Kohei extern void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); 101aa98d7cfSKaiGai Kohei extern void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); 102aa98d7cfSKaiGai Kohei 103c9f700f8SKaiGai Kohei extern int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd, 104c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw); 105c9f700f8SKaiGai Kohei extern int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref, 106c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw); 107aa98d7cfSKaiGai Kohei extern int jffs2_verify_xattr(struct jffs2_sb_info *c); 108c9f700f8SKaiGai Kohei extern void jffs2_release_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd); 109c9f700f8SKaiGai Kohei extern void jffs2_release_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref); 110aa98d7cfSKaiGai Kohei 111aa98d7cfSKaiGai Kohei extern int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname, 112aa98d7cfSKaiGai Kohei char *buffer, size_t size); 113aa98d7cfSKaiGai Kohei extern int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname, 114aa98d7cfSKaiGai Kohei const char *buffer, size_t size, int flags); 115aa98d7cfSKaiGai Kohei 116aa98d7cfSKaiGai Kohei extern struct xattr_handler *jffs2_xattr_handlers[]; 117aa98d7cfSKaiGai Kohei extern struct xattr_handler jffs2_user_xattr_handler; 118aa98d7cfSKaiGai Kohei extern struct xattr_handler jffs2_trusted_xattr_handler; 119aa98d7cfSKaiGai Kohei 120aa98d7cfSKaiGai Kohei extern ssize_t jffs2_listxattr(struct dentry *, char *, size_t); 121aa98d7cfSKaiGai Kohei #define jffs2_getxattr generic_getxattr 122aa98d7cfSKaiGai Kohei #define jffs2_setxattr generic_setxattr 123aa98d7cfSKaiGai Kohei #define jffs2_removexattr generic_removexattr 124aa98d7cfSKaiGai Kohei 125aa98d7cfSKaiGai Kohei #else 126aa98d7cfSKaiGai Kohei 127aa98d7cfSKaiGai Kohei #define jffs2_init_xattr_subsystem(c) 128aa98d7cfSKaiGai Kohei #define jffs2_build_xattr_subsystem(c) 129aa98d7cfSKaiGai Kohei #define jffs2_clear_xattr_subsystem(c) 130aa98d7cfSKaiGai Kohei 131aa98d7cfSKaiGai Kohei #define jffs2_xattr_delete_inode(c, ic) 132aa98d7cfSKaiGai Kohei #define jffs2_xattr_free_inode(c, ic) 133aa98d7cfSKaiGai Kohei #define jffs2_verify_xattr(c) (1) 134aa98d7cfSKaiGai Kohei 135aa98d7cfSKaiGai Kohei #define jffs2_xattr_handlers NULL 136aa98d7cfSKaiGai Kohei #define jffs2_listxattr NULL 137aa98d7cfSKaiGai Kohei #define jffs2_getxattr NULL 138aa98d7cfSKaiGai Kohei #define jffs2_setxattr NULL 139aa98d7cfSKaiGai Kohei #define jffs2_removexattr NULL 140aa98d7cfSKaiGai Kohei 141aa98d7cfSKaiGai Kohei #endif /* CONFIG_JFFS2_FS_XATTR */ 142aa98d7cfSKaiGai Kohei 143aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_SECURITY 144aa98d7cfSKaiGai Kohei extern int jffs2_init_security(struct inode *inode, struct inode *dir); 145aa98d7cfSKaiGai Kohei extern struct xattr_handler jffs2_security_xattr_handler; 146aa98d7cfSKaiGai Kohei #else 147aa98d7cfSKaiGai Kohei #define jffs2_init_security(inode,dir) (0) 148aa98d7cfSKaiGai Kohei #endif /* CONFIG_JFFS2_FS_SECURITY */ 149aa98d7cfSKaiGai Kohei 150aa98d7cfSKaiGai Kohei #endif /* _JFFS2_FS_XATTR_H_ */ 151