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1da177e4 LT |
1 | /* |
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 | */ | |
51 | typedef 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 | ||
60 | struct xlog_tid; | |
61 | typedef 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__ */ |