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__ */