blob: 42158b442b550674cbe1c6fedc487ef990536704 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11 *
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
22 *
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
25 *
26 * http://www.sgi.com
27 *
28 * For further information regarding this notice, see:
29 *
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
31 */
32#ifndef __XFS_LOG_RECOVER_H__
33#define __XFS_LOG_RECOVER_H__
34
35/*
36 * Macros, structures, prototypes for internal log manager use.
37 */
38
39#define XLOG_RHASH_BITS 4
40#define XLOG_RHASH_SIZE 16
41#define XLOG_RHASH_SHIFT 2
42#define XLOG_RHASH(tid) \
43 ((((__uint32_t)tid)>>XLOG_RHASH_SHIFT) & (XLOG_RHASH_SIZE-1))
44
45#define XLOG_MAX_REGIONS_IN_ITEM (XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK / 2 + 1)
46
47
48/*
49 * item headers are in ri_buf[0]. Additional buffers follow.
50 */
51typedef struct xlog_recover_item {
52 struct xlog_recover_item *ri_next;
53 struct xlog_recover_item *ri_prev;
54 int ri_type;
55 int ri_cnt; /* count of regions found */
56 int ri_total; /* total regions */
57 xfs_log_iovec_t *ri_buf; /* ptr to regions buffer */
58} xlog_recover_item_t;
59
60struct xlog_tid;
61typedef struct xlog_recover {
62 struct xlog_recover *r_next;
63 xlog_tid_t r_log_tid; /* log's transaction id */
64 xfs_trans_header_t r_theader; /* trans header for partial */
65 int r_state; /* not needed */
66 xfs_lsn_t r_lsn; /* xact lsn */
67 xlog_recover_item_t *r_itemq; /* q for items */
68} xlog_recover_t;
69
70#define ITEM_TYPE(i) (*(ushort *)(i)->ri_buf[0].i_addr)
71
72/*
73 * This is the number of entries in the l_buf_cancel_table used during
74 * recovery.
75 */
76#define XLOG_BC_TABLE_SIZE 64
77
78#define XLOG_RECOVER_PASS1 1
79#define XLOG_RECOVER_PASS2 2
80
81#endif /* __XFS_LOG_RECOVER_H__ */