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 */ 19aa98d7cfSKaiGai Kohei 20aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum 21aa98d7cfSKaiGai Kohei { 22aa98d7cfSKaiGai Kohei void *always_null; 23aa98d7cfSKaiGai Kohei u8 class; 24aa98d7cfSKaiGai Kohei u8 flags; 25aa98d7cfSKaiGai Kohei u16 xprefix; /* see JFFS2_XATTR_PREFIX_* */ 26aa98d7cfSKaiGai Kohei 27aa98d7cfSKaiGai Kohei struct jffs2_raw_node_ref *node; 28aa98d7cfSKaiGai Kohei struct list_head xindex; /* chained from c->xattrindex[n] */ 29aa98d7cfSKaiGai Kohei uint32_t refcnt; /* # of xattr_ref refers this */ 30aa98d7cfSKaiGai Kohei uint32_t xid; 31aa98d7cfSKaiGai Kohei uint32_t version; 32aa98d7cfSKaiGai Kohei 33aa98d7cfSKaiGai Kohei uint32_t data_crc; 34aa98d7cfSKaiGai Kohei uint32_t hashkey; 35aa98d7cfSKaiGai Kohei char *xname; /* XATTR name without prefix */ 36aa98d7cfSKaiGai Kohei uint32_t name_len; /* length of xname */ 37aa98d7cfSKaiGai Kohei char *xvalue; /* XATTR value */ 38aa98d7cfSKaiGai Kohei uint32_t value_len; /* length of xvalue */ 39aa98d7cfSKaiGai Kohei }; 40aa98d7cfSKaiGai Kohei 41ee886b5dSKaiGai Kohei struct jffs2_inode_cache; 42aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref 43aa98d7cfSKaiGai Kohei { 44aa98d7cfSKaiGai Kohei void *always_null; 45aa98d7cfSKaiGai Kohei u8 class; 46aa98d7cfSKaiGai Kohei u8 flags; /* Currently unused */ 47aa98d7cfSKaiGai Kohei u16 unused; 48aa98d7cfSKaiGai Kohei 49aa98d7cfSKaiGai Kohei struct jffs2_raw_node_ref *node; 50aa98d7cfSKaiGai Kohei union { 51aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic; /* reference to jffs2_inode_cache */ 52aa98d7cfSKaiGai Kohei uint32_t ino; /* only used in scanning/building */ 53aa98d7cfSKaiGai Kohei }; 54aa98d7cfSKaiGai Kohei union { 55aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; /* reference to jffs2_xattr_datum */ 56aa98d7cfSKaiGai Kohei uint32_t xid; /* only used in sccanning/building */ 57aa98d7cfSKaiGai Kohei }; 588f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *next; /* chained from ic->xref_list */ 59aa98d7cfSKaiGai Kohei }; 60aa98d7cfSKaiGai Kohei 61aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 62aa98d7cfSKaiGai Kohei 63aa98d7cfSKaiGai Kohei extern void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c); 64aa98d7cfSKaiGai Kohei extern void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c); 65aa98d7cfSKaiGai Kohei extern void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c); 66aa98d7cfSKaiGai Kohei 67aa98d7cfSKaiGai Kohei extern struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c, 68aa98d7cfSKaiGai Kohei uint32_t xid, uint32_t version); 69aa98d7cfSKaiGai Kohei 70aa98d7cfSKaiGai Kohei extern void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); 71aa98d7cfSKaiGai Kohei extern void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); 72aa98d7cfSKaiGai Kohei 73084702e0SKaiGai Kohei extern int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd); 74084702e0SKaiGai Kohei extern int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref); 75aa98d7cfSKaiGai Kohei extern int jffs2_verify_xattr(struct jffs2_sb_info *c); 76aa98d7cfSKaiGai Kohei 77aa98d7cfSKaiGai Kohei extern int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname, 78aa98d7cfSKaiGai Kohei char *buffer, size_t size); 79aa98d7cfSKaiGai Kohei extern int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname, 80aa98d7cfSKaiGai Kohei const char *buffer, size_t size, int flags); 81aa98d7cfSKaiGai Kohei 82aa98d7cfSKaiGai Kohei extern struct xattr_handler *jffs2_xattr_handlers[]; 83aa98d7cfSKaiGai Kohei extern struct xattr_handler jffs2_user_xattr_handler; 84aa98d7cfSKaiGai Kohei extern struct xattr_handler jffs2_trusted_xattr_handler; 85aa98d7cfSKaiGai Kohei 86aa98d7cfSKaiGai Kohei extern ssize_t jffs2_listxattr(struct dentry *, char *, size_t); 87aa98d7cfSKaiGai Kohei #define jffs2_getxattr generic_getxattr 88aa98d7cfSKaiGai Kohei #define jffs2_setxattr generic_setxattr 89aa98d7cfSKaiGai Kohei #define jffs2_removexattr generic_removexattr 90aa98d7cfSKaiGai Kohei 91aa98d7cfSKaiGai Kohei #else 92aa98d7cfSKaiGai Kohei 93aa98d7cfSKaiGai Kohei #define jffs2_init_xattr_subsystem(c) 94aa98d7cfSKaiGai Kohei #define jffs2_build_xattr_subsystem(c) 95aa98d7cfSKaiGai Kohei #define jffs2_clear_xattr_subsystem(c) 96aa98d7cfSKaiGai Kohei 97aa98d7cfSKaiGai Kohei #define jffs2_xattr_delete_inode(c, ic) 98aa98d7cfSKaiGai Kohei #define jffs2_xattr_free_inode(c, ic) 99aa98d7cfSKaiGai Kohei #define jffs2_verify_xattr(c) (1) 100aa98d7cfSKaiGai Kohei 101aa98d7cfSKaiGai Kohei #define jffs2_xattr_handlers NULL 102aa98d7cfSKaiGai Kohei #define jffs2_listxattr NULL 103aa98d7cfSKaiGai Kohei #define jffs2_getxattr NULL 104aa98d7cfSKaiGai Kohei #define jffs2_setxattr NULL 105aa98d7cfSKaiGai Kohei #define jffs2_removexattr NULL 106aa98d7cfSKaiGai Kohei 107aa98d7cfSKaiGai Kohei #endif /* CONFIG_JFFS2_FS_XATTR */ 108aa98d7cfSKaiGai Kohei 109aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_SECURITY 110aa98d7cfSKaiGai Kohei extern int jffs2_init_security(struct inode *inode, struct inode *dir); 111aa98d7cfSKaiGai Kohei extern struct xattr_handler jffs2_security_xattr_handler; 112aa98d7cfSKaiGai Kohei #else 113aa98d7cfSKaiGai Kohei #define jffs2_init_security(inode,dir) (0) 114aa98d7cfSKaiGai Kohei #endif /* CONFIG_JFFS2_FS_SECURITY */ 115aa98d7cfSKaiGai Kohei 116aa98d7cfSKaiGai Kohei #endif /* _JFFS2_FS_XATTR_H_ */ 117