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btrfs: trace: Introduce trace events for all btrfs tree locking events

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Unlike btrfs_tree_lock() and btrfs_tree_read_lock(), the remaining
functions in locking.c will not sleep, thus doesn't make much sense to
record their execution time.

Those events are introduced mainly for user space tool to audit and
detect lock leakage or dead lock.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo
2019-04-15 21:15:25 +08:00
committed by David Sterba
parent 34e73cc930
commit 31aab40207
2 changed files with 52 additions and 0 deletions
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42
include/trace/events/btrfs.h
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@@ -2049,6 +2049,48 @@ DEFINE_EVENT(btrfs_sleep_tree_lock, btrfs_tree_lock,
TP_ARGS(eb, start_ns)
);
DECLARE_EVENT_CLASS(btrfs_locking_events,
TP_PROTO(const struct extent_buffer *eb),
TP_ARGS(eb),
TP_STRUCT__entry_btrfs(
__field( u64, block )
__field( u64, generation )
__field( u64, owner )
__field( int, is_log_tree )
),
TP_fast_assign_btrfs(eb->fs_info,
__entry->block = eb->start;
__entry->generation = btrfs_header_generation(eb);
__entry->owner = btrfs_header_owner(eb);
__entry->is_log_tree = (eb->log_index >= 0);
),
TP_printk_btrfs("block=%llu generation=%llu owner=%llu is_log_tree=%d",
__entry->block, __entry->generation,
__entry->owner, __entry->is_log_tree)
);
#define DEFINE_BTRFS_LOCK_EVENT(name) \
DEFINE_EVENT(btrfs_locking_events, name, \
TP_PROTO(const struct extent_buffer *eb), \
\
TP_ARGS(eb) \
)
DEFINE_BTRFS_LOCK_EVENT(btrfs_tree_unlock);
DEFINE_BTRFS_LOCK_EVENT(btrfs_tree_read_unlock);
DEFINE_BTRFS_LOCK_EVENT(btrfs_tree_read_unlock_blocking);
DEFINE_BTRFS_LOCK_EVENT(btrfs_set_lock_blocking_read);
DEFINE_BTRFS_LOCK_EVENT(btrfs_set_lock_blocking_write);
DEFINE_BTRFS_LOCK_EVENT(btrfs_clear_lock_blocking_read);
DEFINE_BTRFS_LOCK_EVENT(btrfs_clear_lock_blocking_write);
DEFINE_BTRFS_LOCK_EVENT(btrfs_try_tree_read_lock);
DEFINE_BTRFS_LOCK_EVENT(btrfs_try_tree_write_lock);
DEFINE_BTRFS_LOCK_EVENT(btrfs_tree_read_lock_atomic);
#endif /* _TRACE_BTRFS_H */
/* This part must be outside protection */