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Release 4.11 fs/jffs2/xattr.h

Directory: fs/jffs2
 * JFFS2 -- Journalling Flash File System, Version 2.
 * Copyright © 2006  NEC Corporation
 * Created by KaiGai Kohei <>
 * 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); }


KaiGai Kohei25100.00%1100.00%

#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_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); 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); #else #define jffs2_init_xattr_subsystem(c) #define jffs2_build_xattr_subsystem(c) #define jffs2_clear_xattr_subsystem(c) #define jffs2_xattr_do_crccheck_inode(c, ic) #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 #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_ */

Overall Contributors

KaiGai Kohei51390.96%758.33%
Jean-Christophe Dubois234.08%18.33%
David Woodhouse162.84%216.67%
Eric Paris81.42%18.33%
Stephen Hemminger40.71%18.33%
Directory: fs/jffs2
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