/*
    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 */

  };

  struct reiserfs_security_handle {
  	char *name;
  	void *value;
  	size_t length;
  };

  #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;

  int reiserfs_xattr_register_handlers(void) __init;
  void reiserfs_xattr_unregister_handlers(void);
  int reiserfs_xattr_init(struct super_block *sb, int mount_flags);

  int reiserfs_lookup_privroot(struct super_block *sb);

  int reiserfs_delete_xattrs(struct inode *inode);
  int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);

  int reiserfs_permission(struct inode *inode, int mask);

  #ifdef CONFIG_REISERFS_FS_XATTR

  #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_xattr_get(struct inode *, const char *, void *, size_t);

  int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);

  int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *,
  			      struct inode *, const char *, const void *,
  			      size_t, int);

  extern const struct xattr_handler reiserfs_xattr_user_handler;
  extern const struct xattr_handler reiserfs_xattr_trusted_handler;
  extern const struct xattr_handler reiserfs_xattr_security_handler;

  #ifdef CONFIG_REISERFS_FS_SECURITY
  int reiserfs_security_init(struct inode *dir, struct inode *inode,

  			   const struct qstr *qstr,

  			   struct reiserfs_security_handle *sec);
  int reiserfs_security_write(struct reiserfs_transaction_handle *th,
  			    struct inode *inode,
  			    struct reiserfs_security_handle *sec);
  void reiserfs_security_free(struct reiserfs_security_handle *sec);
  #endif

  static inline int reiserfs_xattrs_initialized(struct super_block *sb)
  {
  	return REISERFS_SB(sb)->priv_root != NULL;
  }

  #define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header))
  static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size)
  {
  	loff_t ret = 0;
  	if (reiserfs_file_data_log(inode)) {
  		ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize);
  		ret >>= inode->i_sb->s_blocksize_bits;
  	}
  	return ret;
  }
  
  /* We may have to create up to 3 objects: xattr root, xattr dir, xattr file.
   * Let's try to be smart about it.
   * xattr root: We cache it. If it's not cached, we may need to create it.
   * xattr dir: If anything has been loaded for this inode, we can set a flag
   *            saying so.
   * xattr file: Since we don't cache xattrs, we can't tell. We always include
   *             blocks for it.
   *
   * However, since root and dir can be created between calls - YOU MUST SAVE
   * THIS VALUE.
   */
  static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode)
  {
  	size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
  
  	if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) {
  		nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);

  		if (!REISERFS_SB(inode->i_sb)->xattr_root->d_inode)

  			nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
  	}
  
  	return nblocks;
  }

  static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
  {

  	init_rwsem(&REISERFS_I(inode)->i_xattr_sem);

  }

  #else

  #define reiserfs_getxattr NULL
  #define reiserfs_setxattr NULL
  #define reiserfs_listxattr NULL
  #define reiserfs_removexattr NULL

  static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
  {
  }

  #endif  /*  CONFIG_REISERFS_FS_XATTR  */

  #ifndef CONFIG_REISERFS_FS_SECURITY
  static inline int reiserfs_security_init(struct inode *dir,
  					 struct inode *inode,

  					 const struct qstr *qstr,

  					 struct reiserfs_security_handle *sec)
  {
  	return 0;
  }
  static inline int
  reiserfs_security_write(struct reiserfs_transaction_handle *th,
  			struct inode *inode,
  			struct reiserfs_security_handle *sec)
  {
  	return 0;
  }
  static inline void reiserfs_security_free(struct reiserfs_security_handle *sec)
  {}
  #endif

  #endif  /*  __KERNEL__  */

  #endif  /*  _LINUX_REISERFS_XATTR_H  */