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/fs/xfs/xfs_log_recover.h

https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t
C Header | 66 lines | 29 code | 10 blank | 27 comment | 0 complexity | 8a9fc9f8e71e24d3bc41d680722a7f84 MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
 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_BLF_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 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 */
43} xlog_recover_item_t;
44
45struct xlog_tid;
46typedef struct xlog_recover {
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 */
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__ */