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127 lines
4.1 KiB
127 lines
4.1 KiB
/* |
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* JFFS2 -- Journalling Flash File System, Version 2. |
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* |
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* Copyright © 2006 NEC Corporation |
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* |
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* Created by KaiGai Kohei <[email protected]> |
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* |
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* For licensing information, see the file 'LICENCE' in this directory. |
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* |
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*/ |
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#ifndef _JFFS2_FS_XATTR_H_ |
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#define _JFFS2_FS_XATTR_H_ |
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#include <linux/xattr.h> |
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#include <linux/list.h> |
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#define JFFS2_XFLAGS_HOT (0x01) /* This datum is HOT */ |
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#define JFFS2_XFLAGS_BIND (0x02) /* This datum is not reclaimed */ |
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#define JFFS2_XFLAGS_DEAD (0x40) /* This datum is already dead */ |
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#define JFFS2_XFLAGS_INVALID (0x80) /* This datum contains crc error */ |
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struct jffs2_xattr_datum |
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{ |
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void *always_null; |
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struct jffs2_raw_node_ref *node; |
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uint8_t class; |
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uint8_t flags; |
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uint16_t xprefix; /* see JFFS2_XATTR_PREFIX_* */ |
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struct list_head xindex; /* chained from c->xattrindex[n] */ |
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atomic_t refcnt; /* # of xattr_ref refers this */ |
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uint32_t xid; |
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uint32_t version; |
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uint32_t data_crc; |
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uint32_t hashkey; |
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char *xname; /* XATTR name without prefix */ |
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uint32_t name_len; /* length of xname */ |
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char *xvalue; /* XATTR value */ |
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uint32_t value_len; /* length of xvalue */ |
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}; |
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struct jffs2_inode_cache; |
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struct jffs2_xattr_ref |
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{ |
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void *always_null; |
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struct jffs2_raw_node_ref *node; |
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uint8_t class; |
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uint8_t flags; /* Currently unused */ |
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u16 unused; |
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uint32_t xseqno; |
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union { |
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struct jffs2_inode_cache *ic; /* reference to jffs2_inode_cache */ |
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uint32_t ino; /* only used in scanning/building */ |
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}; |
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union { |
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struct jffs2_xattr_datum *xd; /* reference to jffs2_xattr_datum */ |
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uint32_t xid; /* only used in sccanning/building */ |
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}; |
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struct jffs2_xattr_ref *next; /* chained from ic->xref_list */ |
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}; |
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#define XREF_DELETE_MARKER (0x00000001) |
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static inline int is_xattr_ref_dead(struct jffs2_xattr_ref *ref) |
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{ |
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return ((ref->xseqno & XREF_DELETE_MARKER) != 0); |
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} |
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#ifdef CONFIG_JFFS2_FS_XATTR |
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extern void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c); |
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extern void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c); |
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extern void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c); |
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extern struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c, |
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uint32_t xid, uint32_t version); |
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extern void jffs2_xattr_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); |
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extern void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); |
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extern void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); |
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extern int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd, |
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struct jffs2_raw_node_ref *raw); |
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extern int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref, |
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struct jffs2_raw_node_ref *raw); |
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extern int jffs2_verify_xattr(struct jffs2_sb_info *c); |
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extern void jffs2_release_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd); |
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extern void jffs2_release_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref); |
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extern int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname, |
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char *buffer, size_t size); |
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extern int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname, |
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const char *buffer, size_t size, int flags); |
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extern const struct xattr_handler *jffs2_xattr_handlers[]; |
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extern const struct xattr_handler jffs2_user_xattr_handler; |
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extern const struct xattr_handler jffs2_trusted_xattr_handler; |
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extern ssize_t jffs2_listxattr(struct dentry *, char *, size_t); |
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#else |
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#define jffs2_init_xattr_subsystem(c) |
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#define jffs2_build_xattr_subsystem(c) |
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#define jffs2_clear_xattr_subsystem(c) |
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#define jffs2_xattr_do_crccheck_inode(c, ic) |
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#define jffs2_xattr_delete_inode(c, ic) |
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#define jffs2_xattr_free_inode(c, ic) |
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#define jffs2_verify_xattr(c) (1) |
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#define jffs2_xattr_handlers NULL |
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#define jffs2_listxattr NULL |
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#endif /* CONFIG_JFFS2_FS_XATTR */ |
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#ifdef CONFIG_JFFS2_FS_SECURITY |
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extern int jffs2_init_security(struct inode *inode, struct inode *dir, |
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const struct qstr *qstr); |
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extern const struct xattr_handler jffs2_security_xattr_handler; |
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#else |
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#define jffs2_init_security(inode,dir,qstr) (0) |
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#endif /* CONFIG_JFFS2_FS_SECURITY */ |
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#endif /* _JFFS2_FS_XATTR_H_ */
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