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| author |  Qu Wenruo <wqu@suse.com>
| 2019-04-15 21:15:25 +0800 |
|---|---|---|
| committer |  David Sterba <dsterba@suse.com>
| 2019-04-29 19:02:43 +0200 |
| commit | 31aab402076f7743b70217cdaa00356e8f8ec530 (patch) | |
| tree | 7d75128d2cf0a8c6cc67f5e747feba42134cf4f3 /include/trace | |
| parent | btrfs: trace: Introduce trace events for sleepable tree lock (diff) | |
| download | linux-31aab402076f7743b70217cdaa00356e8f8ec530.tar.gz linux-31aab402076f7743b70217cdaa00356e8f8ec530.tar.bz2 linux-31aab402076f7743b70217cdaa00356e8f8ec530.zip | |
btrfs: trace: Introduce trace events for all btrfs tree locking events
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>
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/events/btrfs.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h index e27ed5afb958..fe4d268028ee 100644 --- a/include/trace/events/btrfs.h +++ b/include/trace/events/btrfs.h @@ -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 */ |