[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / xfs / xfs_log_recover.h

/*
 * 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__ */
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2000,2005 Silicon Graphics, Inc.
7b718769 NS	3	* All Rights Reserved.
1da177e4	4	*
7b718769 NS	5	* This program is free software; you can redistribute it and/or
7b718769 NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
7b718769 NS	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
1da177e4	13	*
7b718769 NS	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write the Free Software Foundation,
	16	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
1da177e4 LT	17	*/
	18	#ifndef __XFS_LOG_RECOVER_H__
	19	#define __XFS_LOG_RECOVER_H__
	20
	21	/*
	22	* Macros, structures, prototypes for internal log manager use.
	23	*/
	24
	25	#define XLOG_RHASH_BITS 4
	26	#define XLOG_RHASH_SIZE 16
	27	#define XLOG_RHASH_SHIFT 2
	28	#define XLOG_RHASH(tid) \
	29	((((__uint32_t)tid)>>XLOG_RHASH_SHIFT) & (XLOG_RHASH_SIZE-1))
	30
c1155410	31	#define XLOG_MAX_REGIONS_IN_ITEM (XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK / 2 + 1)
1da177e4 LT	32
	33
	34	/*
	35	* item headers are in ri_buf[0]. Additional buffers follow.
	36	*/
	37	typedef struct xlog_recover_item {
f0a76953 DC	38	struct list_head ri_list;
	39	int ri_type;
	40	int ri_cnt; /* count of regions found */
	41	int ri_total; /* total regions */
	42	xfs_log_iovec_t ri_buf; / ptr to regions buffer */
1da177e4 LT	43	} xlog_recover_item_t;
	44
	45	struct xlog_tid;
	46	typedef struct xlog_recover {
f0a76953 DC	47	struct hlist_node r_list;
	48	xlog_tid_t r_log_tid; /* log's transaction id */
	49	xfs_trans_header_t r_theader; /* trans header for partial */
	50	int r_state; /* not needed */
	51	xfs_lsn_t r_lsn; /* xact lsn */
	52	struct list_head r_itemq; /* q for items */
1da177e4 LT	53	} xlog_recover_t;
	54
	55	#define ITEM_TYPE(i) ((ushort )(i)->ri_buf[0].i_addr)
	56
	57	/*
	58	* This is the number of entries in the l_buf_cancel_table used during
	59	* recovery.
	60	*/
	61	#define XLOG_BC_TABLE_SIZE 64
	62
	63	#define XLOG_RECOVER_PASS1 1
	64	#define XLOG_RECOVER_PASS2 2
	65
	66	#endif /* __XFS_LOG_RECOVER_H__ */