1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2000,2005 Silicon Graphics, Inc.
4  * All Rights Reserved.
5  */
6 #ifndef	__XFS_LOG_RECOVER_H__
7 #define __XFS_LOG_RECOVER_H__
8 
9 /*
10  * Macros, structures, prototypes for internal log manager use.
11  */
12 
13 #define XLOG_RHASH_BITS  4
14 #define XLOG_RHASH_SIZE	16
15 #define XLOG_RHASH_SHIFT 2
16 #define XLOG_RHASH(tid)	\
17 	((((uint32_t)tid)>>XLOG_RHASH_SHIFT) & (XLOG_RHASH_SIZE-1))
18 
19 #define XLOG_MAX_REGIONS_IN_ITEM   (XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK / 2 + 1)
20 
21 
22 /*
23  * item headers are in ri_buf[0].  Additional buffers follow.
24  */
25 typedef struct xlog_recover_item {
26 	struct list_head	ri_list;
27 	int			ri_type;
28 	int			ri_cnt;	/* count of regions found */
29 	int			ri_total;	/* total regions */
30 	xfs_log_iovec_t		*ri_buf;	/* ptr to regions buffer */
31 } xlog_recover_item_t;
32 
33 typedef struct xlog_recover {
34 	struct hlist_node	r_list;
35 	xlog_tid_t		r_log_tid;	/* log's transaction id */
36 	xfs_trans_header_t	r_theader;	/* trans header for partial */
37 	int			r_state;	/* not needed */
38 	xfs_lsn_t		r_lsn;		/* xact lsn */
39 	struct list_head	r_itemq;	/* q for items */
40 } xlog_recover_t;
41 
42 #define ITEM_TYPE(i)	(*(unsigned short *)(i)->ri_buf[0].i_addr)
43 
44 /*
45  * This is the number of entries in the l_buf_cancel_table used during
46  * recovery.
47  */
48 #define	XLOG_BC_TABLE_SIZE	64
49 
50 #define	XLOG_RECOVER_CRCPASS	0
51 #define	XLOG_RECOVER_PASS1	1
52 #define	XLOG_RECOVER_PASS2	2
53 
54 #endif	/* __XFS_LOG_RECOVER_H__ */
55