Commit 6b6505d9 authored by Brian Foster's avatar Brian Foster Committed by Greg Kroah-Hartman

xfs: add log recovery tracepoint for head/tail

commit e67d3d42 upstream.

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>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7549e7c0
...@@ -5596,6 +5596,8 @@ xlog_do_recover( ...@@ -5596,6 +5596,8 @@ xlog_do_recover(
xfs_buf_t *bp; xfs_buf_t *bp;
xfs_sb_t *sbp; xfs_sb_t *sbp;
trace_xfs_log_recover(log, head_blk, tail_blk);
/* /*
* First replay the images in the log. * First replay the images in the log.
*/ */
......
...@@ -1991,6 +1991,24 @@ DEFINE_EVENT(xfs_swap_extent_class, name, \ ...@@ -1991,6 +1991,24 @@ DEFINE_EVENT(xfs_swap_extent_class, name, \
DEFINE_SWAPEXT_EVENT(xfs_swap_extent_before); DEFINE_SWAPEXT_EVENT(xfs_swap_extent_before);
DEFINE_SWAPEXT_EVENT(xfs_swap_extent_after); 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, TRACE_EVENT(xfs_log_recover_record,
TP_PROTO(struct xlog *log, struct xlog_rec_header *rhead, int pass), TP_PROTO(struct xlog *log, struct xlog_rec_header *rhead, int pass),
TP_ARGS(log, rhead, pass), TP_ARGS(log, rhead, pass),
......
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