| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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__ */ |