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Commit e67d3d42 authored by Brian Foster's avatar Brian Foster Committed by Darrick J. Wong
Browse files

xfs: add log recovery tracepoint for head/tail 



Torn write detection and tail overwrite detection can shift the log
head and tail respectively in the event of CRC mismatch or
corruption errors. Add a high-level log recovery tracepoint to dump
the final log head/tail and make those values easily attainable in
debug/diagnostic situations.

Signed-off-by: default avatarBrian Foster <bfoster@redhat.com>
Reviewed-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
parent a4c9b34d

fs/xfs/xfs_log_recover.c

+2 −0
Original line number Diff line number Diff line
@@ -5598,6 +5598,8 @@ xlog_do_recover( 
	xfs_buf_t	*bp;

	xfs_sb_t	*sbp;



	trace_xfs_log_recover(log, head_blk, tail_blk);



	/*

	 * First replay the images in the log.

	 */

fs/xfs/xfs_trace.h

+18 −0
Original line number Diff line number Diff line
@@ -1963,6 +1963,24 @@ DEFINE_EVENT(xfs_swap_extent_class, name, \ 
DEFINE_SWAPEXT_EVENT(xfs_swap_extent_before);

DEFINE_SWAPEXT_EVENT(xfs_swap_extent_after);



TRACE_EVENT(xfs_log_recover,

	TP_PROTO(struct xlog *log, xfs_daddr_t headblk, xfs_daddr_t tailblk),

	TP_ARGS(log, headblk, tailblk),

	TP_STRUCT__entry(

		__field(dev_t, dev)

		__field(xfs_daddr_t, headblk)

		__field(xfs_daddr_t, tailblk)

	),

	TP_fast_assign(

		__entry->dev = log->l_mp->m_super->s_dev;

		__entry->headblk = headblk;

		__entry->tailblk = tailblk;

	),

	TP_printk("dev %d:%d headblk 0x%llx tailblk 0x%llx",

		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->headblk,

		  __entry->tailblk)

)



TRACE_EVENT(xfs_log_recover_record,

	TP_PROTO(struct xlog *log, struct xlog_rec_header *rhead, int pass),

	TP_ARGS(log, rhead, pass),