9abbc539bf
Currently there is no tracing in log recovery, so it is difficult to determine what is going on when something goes wrong. Add tracing for log item recovery to provide visibility into the log recovery process. The tracing added shows regions being extracted from the log transactions and added to the transaction hash forming recovery items, followed by the reordering, cancelling and finally recovery of the items. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
140 lines
4.3 KiB
C
140 lines
4.3 KiB
C
/*
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* Copyright (c) 2000-2001,2005 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_BUF_ITEM_H__
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#define __XFS_BUF_ITEM_H__
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extern kmem_zone_t *xfs_buf_item_zone;
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/*
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* This is the structure used to lay out a buf log item in the
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* log. The data map describes which 128 byte chunks of the buffer
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* have been logged.
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* For 6.2 and beyond, this is XFS_LI_BUF. We use this to log everything.
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*/
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typedef struct xfs_buf_log_format {
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unsigned short blf_type; /* buf log item type indicator */
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unsigned short blf_size; /* size of this item */
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ushort blf_flags; /* misc state */
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ushort blf_len; /* number of blocks in this buf */
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__int64_t blf_blkno; /* starting blkno of this buf */
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unsigned int blf_map_size; /* size of data bitmap in words */
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unsigned int blf_data_map[1];/* variable size bitmap of */
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/* regions of buffer in this item */
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} xfs_buf_log_format_t;
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/*
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* This flag indicates that the buffer contains on disk inodes
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* and requires special recovery handling.
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*/
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#define XFS_BLI_INODE_BUF 0x1
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/*
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* This flag indicates that the buffer should not be replayed
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* during recovery because its blocks are being freed.
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*/
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#define XFS_BLI_CANCEL 0x2
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/*
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* This flag indicates that the buffer contains on disk
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* user or group dquots and may require special recovery handling.
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*/
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#define XFS_BLI_UDQUOT_BUF 0x4
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#define XFS_BLI_PDQUOT_BUF 0x8
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#define XFS_BLI_GDQUOT_BUF 0x10
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#define XFS_BLI_CHUNK 128
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#define XFS_BLI_SHIFT 7
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#define BIT_TO_WORD_SHIFT 5
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#define NBWORD (NBBY * sizeof(unsigned int))
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/*
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* buf log item flags
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*/
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#define XFS_BLI_HOLD 0x01
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#define XFS_BLI_DIRTY 0x02
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#define XFS_BLI_STALE 0x04
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#define XFS_BLI_LOGGED 0x08
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#define XFS_BLI_INODE_ALLOC_BUF 0x10
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#define XFS_BLI_STALE_INODE 0x20
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#define XFS_BLI_FLAGS \
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{ XFS_BLI_HOLD, "HOLD" }, \
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{ XFS_BLI_DIRTY, "DIRTY" }, \
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{ XFS_BLI_STALE, "STALE" }, \
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{ XFS_BLI_LOGGED, "LOGGED" }, \
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{ XFS_BLI_INODE_ALLOC_BUF, "INODE_ALLOC" }, \
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{ XFS_BLI_STALE_INODE, "STALE_INODE" }
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#ifdef __KERNEL__
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struct xfs_buf;
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struct xfs_mount;
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struct xfs_buf_log_item;
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/*
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* This is the in core log item structure used to track information
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* needed to log buffers. It tracks how many times the lock has been
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* locked, and which 128 byte chunks of the buffer are dirty.
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*/
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typedef struct xfs_buf_log_item {
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xfs_log_item_t bli_item; /* common item structure */
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struct xfs_buf *bli_buf; /* real buffer pointer */
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unsigned int bli_flags; /* misc flags */
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unsigned int bli_recur; /* lock recursion count */
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atomic_t bli_refcount; /* cnt of tp refs */
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#ifdef XFS_TRANS_DEBUG
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char *bli_orig; /* original buffer copy */
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char *bli_logged; /* bytes logged (bitmap) */
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#endif
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xfs_buf_log_format_t bli_format; /* in-log header */
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} xfs_buf_log_item_t;
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/*
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* This structure is used during recovery to record the buf log
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* items which have been canceled and should not be replayed.
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*/
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typedef struct xfs_buf_cancel {
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xfs_daddr_t bc_blkno;
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uint bc_len;
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int bc_refcount;
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struct xfs_buf_cancel *bc_next;
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} xfs_buf_cancel_t;
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void xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *);
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void xfs_buf_item_relse(struct xfs_buf *);
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void xfs_buf_item_log(xfs_buf_log_item_t *, uint, uint);
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uint xfs_buf_item_dirty(xfs_buf_log_item_t *);
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void xfs_buf_attach_iodone(struct xfs_buf *,
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void(*)(struct xfs_buf *, xfs_log_item_t *),
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xfs_log_item_t *);
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void xfs_buf_iodone_callbacks(struct xfs_buf *);
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void xfs_buf_iodone(struct xfs_buf *, xfs_buf_log_item_t *);
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#ifdef XFS_TRANS_DEBUG
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void
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xfs_buf_item_flush_log_debug(
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struct xfs_buf *bp,
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uint first,
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uint last);
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#else
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#define xfs_buf_item_flush_log_debug(bp, first, last)
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#endif
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#endif /* __KERNEL__ */
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#endif /* __XFS_BUF_ITEM_H__ */
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