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authorBrian Foster <bfoster@redhat.com>2017-09-17 14:06:55 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-09-20 08:20:00 +0200
commit6b6505d90b77f98b0ce08a8332f03cb62f97c78f (patch)
tree65377cc0656fe298f993a49ebf54565955bbc583
parent7549e7c01fb0220e47515ad3ee52f46e2742f178 (diff)
downloadlinux-linaro-stable-6b6505d90b77f98b0ce08a8332f03cb62f97c78f.tar.gz
xfs: add log recovery tracepoint for head/tail
commit e67d3d4246e5fbb0c7c700426d11241ca9c6f473 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: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--fs/xfs/xfs_log_recover.c2
-rw-r--r--fs/xfs/xfs_trace.h18
2 files changed, 20 insertions, 0 deletions
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 83e90bf1899f..edd849b8f14d 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -5596,6 +5596,8 @@ 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 2df73f3a73c1..6221c3818c6e 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -1991,6 +1991,24 @@ 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),