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authorQu Wenruo <wqu@suse.com>2019-04-15 16:15:25 +0300
committerDavid Sterba <dsterba@suse.com>2019-04-29 20:02:43 +0300
commit31aab402076f7743b70217cdaa00356e8f8ec530 (patch)
tree7d75128d2cf0a8c6cc67f5e747feba42134cf4f3 /include/trace
parent34e73cc930a8677426c9cbffdd3421e18f32e79f (diff)
downloadlinux-31aab402076f7743b70217cdaa00356e8f8ec530.tar.xz
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.h42
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 */