6528250b71
Log recovery torn write detection uses CRC verification over a range of the active log to identify torn writes. Since the generic log recovery pass code implements a superset of the functionality required for CRC verification, it can be easily modified to support a CRC verification only pass. Create a new CRC pass type and update the log record processing helper to skip everything beyond CRC verification when in this mode. This pass will be invoked in subsequent patches to implement torn write detection. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
68 lines
2 KiB
C
68 lines
2 KiB
C
/*
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* Copyright (c) 2000,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_LOG_RECOVER_H__
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#define __XFS_LOG_RECOVER_H__
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/*
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* Macros, structures, prototypes for internal log manager use.
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*/
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#define XLOG_RHASH_BITS 4
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#define XLOG_RHASH_SIZE 16
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#define XLOG_RHASH_SHIFT 2
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#define XLOG_RHASH(tid) \
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((((__uint32_t)tid)>>XLOG_RHASH_SHIFT) & (XLOG_RHASH_SIZE-1))
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#define XLOG_MAX_REGIONS_IN_ITEM (XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK / 2 + 1)
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/*
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* item headers are in ri_buf[0]. Additional buffers follow.
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*/
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typedef struct xlog_recover_item {
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struct list_head ri_list;
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int ri_type;
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int ri_cnt; /* count of regions found */
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int ri_total; /* total regions */
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xfs_log_iovec_t *ri_buf; /* ptr to regions buffer */
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} xlog_recover_item_t;
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struct xlog_tid;
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typedef struct xlog_recover {
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struct hlist_node r_list;
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xlog_tid_t r_log_tid; /* log's transaction id */
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xfs_trans_header_t r_theader; /* trans header for partial */
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int r_state; /* not needed */
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xfs_lsn_t r_lsn; /* xact lsn */
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struct list_head r_itemq; /* q for items */
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} xlog_recover_t;
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#define ITEM_TYPE(i) (*(ushort *)(i)->ri_buf[0].i_addr)
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/*
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* This is the number of entries in the l_buf_cancel_table used during
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* recovery.
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*/
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#define XLOG_BC_TABLE_SIZE 64
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#define XLOG_RECOVER_CRCPASS 0
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#define XLOG_RECOVER_PASS1 1
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#define XLOG_RECOVER_PASS2 2
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#endif /* __XFS_LOG_RECOVER_H__ */
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