/*

   * Copyright (c) 2000,2005 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_LOG_RECOVER_H__
  #define __XFS_LOG_RECOVER_H__
  
  /*
   * Macros, structures, prototypes for internal log manager use.
   */
  
  #define XLOG_RHASH_BITS  4
  #define XLOG_RHASH_SIZE	16
  #define XLOG_RHASH_SHIFT 2
  #define XLOG_RHASH(tid)	\
  	((((__uint32_t)tid)>>XLOG_RHASH_SHIFT) & (XLOG_RHASH_SIZE-1))

  #define XLOG_MAX_REGIONS_IN_ITEM   (XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK / 2 + 1)

  
  
  /*
   * item headers are in ri_buf[0].  Additional buffers follow.
   */
  typedef struct xlog_recover_item {

  	struct list_head	ri_list;
  	int			ri_type;
  	int			ri_cnt;	/* count of regions found */
  	int			ri_total;	/* total regions */
  	xfs_log_iovec_t		*ri_buf;	/* ptr to regions buffer */

  } xlog_recover_item_t;
  
  struct xlog_tid;
  typedef struct xlog_recover {

  	struct hlist_node	r_list;
  	xlog_tid_t		r_log_tid;	/* log's transaction id */
  	xfs_trans_header_t	r_theader;	/* trans header for partial */
  	int			r_state;	/* not needed */
  	xfs_lsn_t		r_lsn;		/* xact lsn */
  	struct list_head	r_itemq;	/* q for items */

  } xlog_recover_t;
  
  #define ITEM_TYPE(i)	(*(ushort *)(i)->ri_buf[0].i_addr)
  
  /*
   * This is the number of entries in the l_buf_cancel_table used during
   * recovery.
   */
  #define	XLOG_BC_TABLE_SIZE	64
  
  #define	XLOG_RECOVER_PASS1	1
  #define	XLOG_RECOVER_PASS2	2
  
  #endif	/* __XFS_LOG_RECOVER_H__ */