/*

   * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
   * All Rights Reserved.

   *

   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License as

   * published by the Free Software Foundation.
   *

   * This program is distributed in the hope that it would be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.

   *

   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write the Free Software Foundation,
   * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

   */
  #ifndef __XFS_ATTR_SF_H__
  #define	__XFS_ATTR_SF_H__
  
  /*
   * Attribute storage when stored inside the inode.
   *
   * Small attribute lists are packed as tightly as possible so as
   * to fit into the literal area of the inode.
   */

  /*
   * Entries are packed toward the top as tight as possible.
   */
  typedef struct xfs_attr_shortform {
  	struct xfs_attr_sf_hdr {	/* constant-structure header block */

  		__be16	totsize;	/* total bytes in shortform list */
  		__u8	count;	/* count of active entries */

  	} hdr;
  	struct xfs_attr_sf_entry {
  		__uint8_t namelen;	/* actual length of name (no NULL) */
  		__uint8_t valuelen;	/* actual length of value (no NULL) */
  		__uint8_t flags;	/* flags bits (see xfs_attr_leaf.h) */
  		__uint8_t nameval[1];	/* name & value bytes concatenated */
  	} list[1];			/* variable sized array */
  } xfs_attr_shortform_t;
  typedef struct xfs_attr_sf_hdr xfs_attr_sf_hdr_t;
  typedef struct xfs_attr_sf_entry xfs_attr_sf_entry_t;
  
  /*
   * We generate this then sort it, attr_list() must return things in hash-order.
   */
  typedef struct xfs_attr_sf_sort {
  	__uint8_t	entno;		/* entry number in original list */
  	__uint8_t	namelen;	/* length of name value (no null) */
  	__uint8_t	valuelen;	/* length of value */
  	__uint8_t	flags;		/* flags bits (see xfs_attr_leaf.h) */
  	xfs_dahash_t	hash;		/* this entry's hash value */

  	unsigned char	*name;		/* name value, pointer into buffer */

  } xfs_attr_sf_sort_t;

  #define XFS_ATTR_SF_ENTSIZE_BYNAME(nlen,vlen)	/* space name/value uses */ \

  	(((int)sizeof(xfs_attr_sf_entry_t)-1 + (nlen)+(vlen)))

  #define XFS_ATTR_SF_ENTSIZE_MAX			/* max space for name&value */ \
  	((1 << (NBBY*(int)sizeof(__uint8_t))) - 1)

  #define XFS_ATTR_SF_ENTSIZE(sfep)		/* space an entry uses */ \
  	((int)sizeof(xfs_attr_sf_entry_t)-1 + (sfep)->namelen+(sfep)->valuelen)

  #define XFS_ATTR_SF_NEXTENTRY(sfep)		/* next entry in struct */ \

  	((xfs_attr_sf_entry_t *)((char *)(sfep) + XFS_ATTR_SF_ENTSIZE(sfep)))

  #define XFS_ATTR_SF_TOTSIZE(dp)			/* total space in use */ \

  	(be16_to_cpu(((xfs_attr_shortform_t *)	\
  		((dp)->i_afp->if_u1.if_data))->hdr.totsize))

  #endif	/* __XFS_ATTR_SF_H__ */