/* * JFFS2 -- Journalling Flash File System, Version 2. * * Copyright © 2006 NEC Corporation * * Created by KaiGai Kohei <kaigai@ak.jp.nec.com> * * For licensing information, see the file 'LICENCE' in this directory. * */ #ifndef _JFFS2_FS_XATTR_H_ #define _JFFS2_FS_XATTR_H_ #include <linux/xattr.h> #include <linux/list.h> #define JFFS2_XFLAGS_HOT (0x01) /* This datum is HOT */ #define JFFS2_XFLAGS_BIND (0x02) /* This datum is not reclaimed */ #define JFFS2_XFLAGS_DEAD (0x40) /* This datum is already dead */ #define JFFS2_XFLAGS_INVALID (0x80) /* This datum contains crc error */ struct jffs2_xattr_datum { void *always_null; struct jffs2_raw_node_ref *node; uint8_t class; uint8_t flags; uint16_t xprefix; /* see JFFS2_XATTR_PREFIX_* */ struct list_head xindex; /* chained from c->xattrindex[n] */ atomic_t refcnt; /* # of xattr_ref refers this */ uint32_t xid; uint32_t version; uint32_t data_crc; uint32_t hashkey; char *xname; /* XATTR name without prefix */ uint32_t name_len; /* length of xname */ char *xvalue; /* XATTR value */ uint32_t value_len; /* length of xvalue */ }; struct jffs2_inode_cache; struct jffs2_xattr_ref { void *always_null; struct jffs2_raw_node_ref *node; uint8_t class; uint8_t flags; /* Currently unused */ u16 unused; uint32_t xseqno; union { struct jffs2_inode_cache *ic; /* reference to jffs2_inode_cache */ uint32_t ino; /* only used in scanning/building */ }; union { struct jffs2_xattr_datum *xd; /* reference to jffs2_xattr_datum */ uint32_t xid; /* only used in sccanning/building */ }; struct jffs2_xattr_ref *next; /* chained from ic->xref_list */ }; #define XREF_DELETE_MARKER (0x00000001) static inline int is_xattr_ref_dead(struct jffs2_xattr_ref *ref) { return ((ref->xseqno & XREF_DELETE_MARKER) != 0); } #ifdef CONFIG_JFFS2_FS_XATTR extern void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c); extern void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c); extern void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c); extern struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c, uint32_t xid, uint32_t version); extern void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); extern void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); extern int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd, struct jffs2_raw_node_ref *raw); extern int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref, struct jffs2_raw_node_ref *raw); extern int jffs2_verify_xattr(struct jffs2_sb_info *c); extern void jffs2_release_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd); extern void jffs2_release_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref); extern int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname, char *buffer, size_t size); extern int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname, const char *buffer, size_t size, int flags); extern const struct xattr_handler *jffs2_xattr_handlers[]; extern const struct xattr_handler jffs2_user_xattr_handler; extern const struct xattr_handler jffs2_trusted_xattr_handler; extern ssize_t jffs2_listxattr(struct dentry *, char *, size_t); #define jffs2_getxattr generic_getxattr #define jffs2_setxattr generic_setxattr #define jffs2_removexattr generic_removexattr #else #define jffs2_init_xattr_subsystem(c) #define jffs2_build_xattr_subsystem(c) #define jffs2_clear_xattr_subsystem(c) #define jffs2_xattr_delete_inode(c, ic) #define jffs2_xattr_free_inode(c, ic) #define jffs2_verify_xattr(c) (1) #define jffs2_xattr_handlers NULL #define jffs2_listxattr NULL #define jffs2_getxattr NULL #define jffs2_setxattr NULL #define jffs2_removexattr NULL #endif /* CONFIG_JFFS2_FS_XATTR */ #ifdef CONFIG_JFFS2_FS_SECURITY extern int jffs2_init_security(struct inode *inode, struct inode *dir, const struct qstr *qstr); extern const struct xattr_handler jffs2_security_xattr_handler; #else #define jffs2_init_security(inode,dir,qstr) (0) #endif /* CONFIG_JFFS2_FS_SECURITY */ #endif /* _JFFS2_FS_XATTR_H_ */