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 */ 198a13695cSKaiGai Kohei #define JFFS2_XFLAGS_DEAD (0x40) /* This datum is already dead */ 20c9f700f8SKaiGai Kohei #define JFFS2_XFLAGS_INVALID (0x80) /* This datum contains crc error */ 21aa98d7cfSKaiGai Kohei 22aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum 23aa98d7cfSKaiGai Kohei { 24aa98d7cfSKaiGai Kohei void *always_null; 25aa98d7cfSKaiGai Kohei struct jffs2_raw_node_ref *node; 26987d47b7SDavid Woodhouse uint8_t class; 27987d47b7SDavid Woodhouse uint8_t flags; 28987d47b7SDavid Woodhouse uint16_t xprefix; /* see JFFS2_XATTR_PREFIX_* */ 29987d47b7SDavid Woodhouse 30aa98d7cfSKaiGai Kohei struct list_head xindex; /* chained from c->xattrindex[n] */ 31aa98d7cfSKaiGai Kohei uint32_t refcnt; /* # of xattr_ref refers this */ 32aa98d7cfSKaiGai Kohei uint32_t xid; 33aa98d7cfSKaiGai Kohei uint32_t version; 34aa98d7cfSKaiGai Kohei 35aa98d7cfSKaiGai Kohei uint32_t data_crc; 36aa98d7cfSKaiGai Kohei uint32_t hashkey; 37aa98d7cfSKaiGai Kohei char *xname; /* XATTR name without prefix */ 38aa98d7cfSKaiGai Kohei uint32_t name_len; /* length of xname */ 39aa98d7cfSKaiGai Kohei char *xvalue; /* XATTR value */ 40aa98d7cfSKaiGai Kohei uint32_t value_len; /* length of xvalue */ 41aa98d7cfSKaiGai Kohei }; 42aa98d7cfSKaiGai Kohei 43ee886b5dSKaiGai Kohei struct jffs2_inode_cache; 44aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref 45aa98d7cfSKaiGai Kohei { 46aa98d7cfSKaiGai Kohei void *always_null; 47987d47b7SDavid Woodhouse struct jffs2_raw_node_ref *node; 48987d47b7SDavid Woodhouse uint8_t class; 49987d47b7SDavid Woodhouse uint8_t flags; /* Currently unused */ 50aa98d7cfSKaiGai Kohei u16 unused; 51aa98d7cfSKaiGai Kohei 52c9f700f8SKaiGai Kohei uint32_t xseqno; 53aa98d7cfSKaiGai Kohei union { 54aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic; /* reference to jffs2_inode_cache */ 55aa98d7cfSKaiGai Kohei uint32_t ino; /* only used in scanning/building */ 56aa98d7cfSKaiGai Kohei }; 57aa98d7cfSKaiGai Kohei union { 58aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; /* reference to jffs2_xattr_datum */ 59aa98d7cfSKaiGai Kohei uint32_t xid; /* only used in sccanning/building */ 60aa98d7cfSKaiGai Kohei }; 618f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *next; /* chained from ic->xref_list */ 62aa98d7cfSKaiGai Kohei }; 63aa98d7cfSKaiGai Kohei 64c9f700f8SKaiGai Kohei #define XREF_DELETE_MARKER (0x00000001) 65c9f700f8SKaiGai Kohei static inline int is_xattr_ref_dead(struct jffs2_xattr_ref *ref) 66c9f700f8SKaiGai Kohei { 67c9f700f8SKaiGai Kohei return ((ref->xseqno & XREF_DELETE_MARKER) != 0); 68c9f700f8SKaiGai Kohei } 69c9f700f8SKaiGai Kohei 70aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 71aa98d7cfSKaiGai Kohei 72aa98d7cfSKaiGai Kohei extern void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c); 73aa98d7cfSKaiGai Kohei extern void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c); 74aa98d7cfSKaiGai Kohei extern void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c); 75aa98d7cfSKaiGai Kohei 76aa98d7cfSKaiGai Kohei extern struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c, 77aa98d7cfSKaiGai Kohei uint32_t xid, uint32_t version); 78aa98d7cfSKaiGai Kohei 79aa98d7cfSKaiGai Kohei extern void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); 80aa98d7cfSKaiGai Kohei extern void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); 81aa98d7cfSKaiGai Kohei 82c9f700f8SKaiGai Kohei extern int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd, 83c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw); 84c9f700f8SKaiGai Kohei extern int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref, 85c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw); 86aa98d7cfSKaiGai Kohei extern int jffs2_verify_xattr(struct jffs2_sb_info *c); 87c9f700f8SKaiGai Kohei extern void jffs2_release_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd); 88c9f700f8SKaiGai Kohei extern void jffs2_release_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref); 89aa98d7cfSKaiGai Kohei 90aa98d7cfSKaiGai Kohei extern int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname, 91aa98d7cfSKaiGai Kohei char *buffer, size_t size); 92aa98d7cfSKaiGai Kohei extern int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname, 93aa98d7cfSKaiGai Kohei const char *buffer, size_t size, int flags); 94aa98d7cfSKaiGai Kohei 95aa98d7cfSKaiGai Kohei extern struct xattr_handler *jffs2_xattr_handlers[]; 96aa98d7cfSKaiGai Kohei extern struct xattr_handler jffs2_user_xattr_handler; 97aa98d7cfSKaiGai Kohei extern struct xattr_handler jffs2_trusted_xattr_handler; 98aa98d7cfSKaiGai Kohei 99aa98d7cfSKaiGai Kohei extern ssize_t jffs2_listxattr(struct dentry *, char *, size_t); 100aa98d7cfSKaiGai Kohei #define jffs2_getxattr generic_getxattr 101aa98d7cfSKaiGai Kohei #define jffs2_setxattr generic_setxattr 102aa98d7cfSKaiGai Kohei #define jffs2_removexattr generic_removexattr 103aa98d7cfSKaiGai Kohei 104aa98d7cfSKaiGai Kohei #else 105aa98d7cfSKaiGai Kohei 106aa98d7cfSKaiGai Kohei #define jffs2_init_xattr_subsystem(c) 107aa98d7cfSKaiGai Kohei #define jffs2_build_xattr_subsystem(c) 108aa98d7cfSKaiGai Kohei #define jffs2_clear_xattr_subsystem(c) 109aa98d7cfSKaiGai Kohei 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 #define jffs2_getxattr NULL 117aa98d7cfSKaiGai Kohei #define jffs2_setxattr NULL 118aa98d7cfSKaiGai Kohei #define jffs2_removexattr NULL 119aa98d7cfSKaiGai Kohei 120aa98d7cfSKaiGai Kohei #endif /* CONFIG_JFFS2_FS_XATTR */ 121aa98d7cfSKaiGai Kohei 122aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_SECURITY 123aa98d7cfSKaiGai Kohei extern int jffs2_init_security(struct inode *inode, struct inode *dir); 124aa98d7cfSKaiGai Kohei extern struct xattr_handler jffs2_security_xattr_handler; 125aa98d7cfSKaiGai Kohei #else 126aa98d7cfSKaiGai Kohei #define jffs2_init_security(inode,dir) (0) 127aa98d7cfSKaiGai Kohei #endif /* CONFIG_JFFS2_FS_SECURITY */ 128aa98d7cfSKaiGai Kohei 129aa98d7cfSKaiGai Kohei #endif /* _JFFS2_FS_XATTR_H_ */ 130