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authorLiu Bo <bo.li.liu@oracle.com>2018-01-05 12:51:16 -0700
committerDavid Sterba <dsterba@suse.com>2018-03-26 15:09:38 +0200
commit393da91819e35af538ef97c7c6a04899e2fbfe0e (patch)
tree9a81e6d1a4aa4fb32a876098f0121f38bf726987 /include/trace/events/btrfs.h
parent5d23515be66904fa3b1b5d6bd72d2199cd2447ab (diff)
downloadlinux-393da91819e35af538ef97c7c6a04899e2fbfe0e.tar.bz2
Btrfs: add tracepoint for em's EEXIST case
This is adding a tracepoint 'btrfs_handle_em_exist' to help debug the subtle bugs around merge_extent_mapping. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Reviewed-by: Josef Bacik <jbacik@fb.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'include/trace/events/btrfs.h')
-rw-r--r--include/trace/events/btrfs.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index c3ac5ec86519..486771e3f4cb 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -248,6 +248,41 @@ TRACE_EVENT_CONDITION(btrfs_get_extent,
__entry->refs, __entry->compress_type)
);
+TRACE_EVENT(btrfs_handle_em_exist,
+
+ TP_PROTO(const struct extent_map *existing, const struct extent_map *map, u64 start, u64 len),
+
+ TP_ARGS(existing, map, start, len),
+
+ TP_STRUCT__entry(
+ __field( u64, e_start )
+ __field( u64, e_len )
+ __field( u64, map_start )
+ __field( u64, map_len )
+ __field( u64, start )
+ __field( u64, len )
+ ),
+
+ TP_fast_assign(
+ __entry->e_start = existing->start;
+ __entry->e_len = existing->len;
+ __entry->map_start = map->start;
+ __entry->map_len = map->len;
+ __entry->start = start;
+ __entry->len = len;
+ ),
+
+ TP_printk("start=%llu len=%llu "
+ "existing(start=%llu len=%llu) "
+ "em(start=%llu len=%llu)",
+ (unsigned long long)__entry->start,
+ (unsigned long long)__entry->len,
+ (unsigned long long)__entry->e_start,
+ (unsigned long long)__entry->e_len,
+ (unsigned long long)__entry->map_start,
+ (unsigned long long)__entry->map_len)
+);
+
/* file extent item */
DECLARE_EVENT_CLASS(btrfs__file_extent_item_regular,