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 */ 37 typedef 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 45 typedef struct xlog_recover { 46 struct hlist_node r_list; 47 xlog_tid_t r_log_tid; /* log's transaction id */ 48 xfs_trans_header_t r_theader; /* trans header for partial */ 49 int r_state; /* not needed */ 50 xfs_lsn_t r_lsn; /* xact lsn */ 51 struct list_head r_itemq; /* q for items */ 52 } xlog_recover_t; 53 54 #define ITEM_TYPE(i) (*(unsigned short *)(i)->ri_buf[0].i_addr) 55 56 /* 57 * This is the number of entries in the l_buf_cancel_table used during 58 * recovery. 59 */ 60 #define XLOG_BC_TABLE_SIZE 64 61 62 #define XLOG_RECOVER_CRCPASS 0 63 #define XLOG_RECOVER_PASS1 1 64 #define XLOG_RECOVER_PASS2 2 65 66 #endif /* __XFS_LOG_RECOVER_H__ */ 67