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| author | Brian Foster <bfoster@redhat.com> | 2017-08-08 18:21:53 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2017-08-22 09:22:24 -0700 |
| commit | e67d3d4246e5fbb0c7c700426d11241ca9c6f473 (patch) | |
| tree | fc79e3a08ec2a4e62603034cbe82dbfaf9e77d94 | |
| parent | a4c9b34d6a17081005ec459b57b8effc08f4c731 (diff) | |
| download | blackbird-op-linux-e67d3d4246e5fbb0c7c700426d11241ca9c6f473.tar.gz blackbird-op-linux-e67d3d4246e5fbb0c7c700426d11241ca9c6f473.zip | |
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: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
| -rw-r--r-- | fs/xfs/xfs_log_recover.c | 2 | ||||
| -rw-r--r-- | fs/xfs/xfs_trace.h | 18 |
2 files changed, 20 insertions, 0 deletions
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 43d5df3a563f..a36239980cf7 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -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. */ diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h index bcc3cdf8e1c5..68810477ef2c 100644 --- a/fs/xfs/xfs_trace.h +++ b/fs/xfs/xfs_trace.h @@ -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), |
