text: /*
    File: linux/reiserfs_xattr.h
  */
  
  #ifndef _LINUX_REISERFS_XATTR_H
  #define _LINUX_REISERFS_XATTR_H
  
  #include <linux/types.h>
  
  /* Magic value in header */
  #define REISERFS_XATTR_MAGIC 0x52465841	/* "RFXA" */
  
  struct reiserfs_xattr_header {
  	__le32 h_magic;		/* magic number for identification */
  	__le32 h_hash;		/* hash of the value */
  };
  
  #ifdef __KERNEL__
  
  #include <linux/init.h>
  #include <linux/list.h>
  #include <linux/rwsem.h>
  #include <linux/reiserfs_fs_i.h>
  #include <linux/reiserfs_fs.h>
  
  struct inode;
  struct dentry;
  struct iattr;
  struct super_block;
  struct nameidata;
  
  struct reiserfs_xattr_handler {
  	char *prefix;
  	int (*init) (void);
  	void (*exit) (void);
  	int (*get) (struct inode * inode, const char *name, void *buffer,
  		    size_t size);
  	int (*set) (struct inode * inode, const char *name, const void *buffer,
  		    size_t size, int flags);
  	int (*del) (struct inode * inode, const char *name);
  	int (*list) (struct inode * inode, const char *name, int namelen,
  		     char *out);
  	struct list_head handlers;
  };
  
  #ifdef CONFIG_REISERFS_FS_XATTR
  #define is_reiserfs_priv_object(inode) IS_PRIVATE(inode)
  #define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
  ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name,
  			  void *buffer, size_t size);
  int reiserfs_setxattr(struct dentry *dentry, const char *name,
  		      const void *value, size_t size, int flags);
  ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
  int reiserfs_removexattr(struct dentry *dentry, const char *name);
  int reiserfs_delete_xattrs(struct inode *inode);
  int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);
  int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
  int reiserfs_permission(struct inode *inode, int mask, struct nameidata *nd);
  
  int reiserfs_xattr_del(struct inode *, const char *);
  int reiserfs_xattr_get(const struct inode *, const char *, void *, size_t);
  int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
  
  extern struct reiserfs_xattr_handler user_handler;
  extern struct reiserfs_xattr_handler trusted_handler;
  extern struct reiserfs_xattr_handler security_handler;
  
  int reiserfs_xattr_register_handlers(void) __init;
  void reiserfs_xattr_unregister_handlers(void);
  
  static inline void reiserfs_write_lock_xattrs(struct super_block *sb)
  {
  	down_write(&REISERFS_XATTR_DIR_SEM(sb));
  }
  static inline void reiserfs_write_unlock_xattrs(struct super_block *sb)
  {
  	up_write(&REISERFS_XATTR_DIR_SEM(sb));
  }
  static inline void reiserfs_read_lock_xattrs(struct super_block *sb)
  {
  	down_read(&REISERFS_XATTR_DIR_SEM(sb));
  }
  
  static inline void reiserfs_read_unlock_xattrs(struct super_block *sb)
  {
  	up_read(&REISERFS_XATTR_DIR_SEM(sb));
  }
  
  static inline void reiserfs_write_lock_xattr_i(struct inode *inode)
  {
  	down_write(&REISERFS_I(inode)->xattr_sem);
  }
  static inline void reiserfs_write_unlock_xattr_i(struct inode *inode)
  {
  	up_write(&REISERFS_I(inode)->xattr_sem);
  }
  static inline void reiserfs_read_lock_xattr_i(struct inode *inode)
  {
  	down_read(&REISERFS_I(inode)->xattr_sem);
  }
  
  static inline void reiserfs_read_unlock_xattr_i(struct inode *inode)
  {
  	up_read(&REISERFS_I(inode)->xattr_sem);
  }
  
  static inline void reiserfs_mark_inode_private(struct inode *inode)
  {
  	inode->i_flags |= S_PRIVATE;
  }
  
  static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
  {
  	init_rwsem(&REISERFS_I(inode)->xattr_sem);
  }
  
  #else
  
  #define is_reiserfs_priv_object(inode) 0
  #define reiserfs_mark_inode_private(inode) do {;} while(0)
  #define reiserfs_getxattr NULL
  #define reiserfs_setxattr NULL
  #define reiserfs_listxattr NULL
  #define reiserfs_removexattr NULL
  #define reiserfs_write_lock_xattrs(sb) do {;} while(0)
  #define reiserfs_write_unlock_xattrs(sb) do {;} while(0)
  #define reiserfs_read_lock_xattrs(sb)
  #define reiserfs_read_unlock_xattrs(sb)
  
  #define reiserfs_permission NULL
  
  #define reiserfs_xattr_register_handlers() 0
  #define reiserfs_xattr_unregister_handlers()
  
  static inline int reiserfs_delete_xattrs(struct inode *inode)
  {
  	return 0;
  };
  static inline int reiserfs_chown_xattrs(struct inode *inode,
  					struct iattr *attrs)
  {
  	return 0;
  };
  static inline int reiserfs_xattr_init(struct super_block *sb, int mount_flags)
  {
  	sb->s_flags = (sb->s_flags & ~MS_POSIXACL);	/* to be sure */
  	return 0;
  };
  static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
  {
  }
  #endif  /*  CONFIG_REISERFS_FS_XATTR  */
  
  #endif  /*  __KERNEL__  */
  
  #endif  /*  _LINUX_REISERFS_XATTR_H  */
  