1/*
2 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
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.
13 *
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
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
31#define XLOG_MAX_REGIONS_IN_ITEM   (XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK / 2 + 1)
32
33
34/*
35 * item headers are in ri_buf[0].  Additional buffers follow.
36 */
37typedef struct xlog_recover_item {
38	struct xlog_recover_item *ri_next;
39	struct xlog_recover_item *ri_prev;
40	int			 ri_type;
41	int			 ri_cnt;	/* count of regions found */
42	int			 ri_total;	/* total regions */
43	xfs_log_iovec_t		 *ri_buf;	/* ptr to regions buffer */
44} xlog_recover_item_t;
45
46struct xlog_tid;
47typedef struct xlog_recover {
48	struct xlog_recover *r_next;
49	xlog_tid_t	    r_log_tid;		/* log's transaction id */
50	xfs_trans_header_t  r_theader;		/* trans header for partial */
51	int		    r_state;		/* not needed */
52	xfs_lsn_t	    r_lsn;		/* xact lsn */
53	xlog_recover_item_t *r_itemq;		/* q for items */
54} xlog_recover_t;
55
56#define ITEM_TYPE(i)	(*(ushort *)(i)->ri_buf[0].i_addr)
57
58/*
59 * This is the number of entries in the l_buf_cancel_table used during
60 * recovery.
61 */
62#define	XLOG_BC_TABLE_SIZE	64
63
64#define	XLOG_RECOVER_PASS1	1
65#define	XLOG_RECOVER_PASS2	2
66
67#endif	/* __XFS_LOG_RECOVER_H__ */
68