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-rw-r--r--fs/btrfs/locking.c10
-rw-r--r--include/trace/events/btrfs.h42
2 files changed, 52 insertions, 0 deletions
diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c
index 67b77f1d113e..2f6c3c7851ed 100644
--- a/fs/btrfs/locking.c
+++ b/fs/btrfs/locking.c
@@ -87,6 +87,7 @@ static void btrfs_assert_tree_write_locks_put(struct extent_buffer *eb) { }
void btrfs_set_lock_blocking_read(struct extent_buffer *eb)
{
+ trace_btrfs_set_lock_blocking_read(eb);
/*
* No lock is required. The lock owner may change if we have a read
* lock, but it won't change to or away from us. If we have the write
@@ -102,6 +103,7 @@ void btrfs_set_lock_blocking_read(struct extent_buffer *eb)
void btrfs_set_lock_blocking_write(struct extent_buffer *eb)
{
+ trace_btrfs_set_lock_blocking_write(eb);
/*
* No lock is required. The lock owner may change if we have a read
* lock, but it won't change to or away from us. If we have the write
@@ -119,6 +121,7 @@ void btrfs_set_lock_blocking_write(struct extent_buffer *eb)
void btrfs_clear_lock_blocking_read(struct extent_buffer *eb)
{
+ trace_btrfs_clear_lock_blocking_read(eb);
/*
* No lock is required. The lock owner may change if we have a read
* lock, but it won't change to or away from us. If we have the write
@@ -136,6 +139,7 @@ void btrfs_clear_lock_blocking_read(struct extent_buffer *eb)
void btrfs_clear_lock_blocking_write(struct extent_buffer *eb)
{
+ trace_btrfs_clear_lock_blocking_write(eb);
/*
* no lock is required. The lock owner may change if
* we have a read lock, but it won't change to or away
@@ -209,6 +213,7 @@ int btrfs_tree_read_lock_atomic(struct extent_buffer *eb)
}
btrfs_assert_tree_read_locks_get(eb);
btrfs_assert_spinning_readers_get(eb);
+ trace_btrfs_tree_read_lock_atomic(eb);
return 1;
}
@@ -230,6 +235,7 @@ int btrfs_try_tree_read_lock(struct extent_buffer *eb)
}
btrfs_assert_tree_read_locks_get(eb);
btrfs_assert_spinning_readers_get(eb);
+ trace_btrfs_try_tree_read_lock(eb);
return 1;
}
@@ -252,6 +258,7 @@ int btrfs_try_tree_write_lock(struct extent_buffer *eb)
btrfs_assert_tree_write_locks_get(eb);
btrfs_assert_spinning_writers_get(eb);
eb->lock_owner = current->pid;
+ trace_btrfs_try_tree_write_lock(eb);
return 1;
}
@@ -260,6 +267,7 @@ int btrfs_try_tree_write_lock(struct extent_buffer *eb)
*/
void btrfs_tree_read_unlock(struct extent_buffer *eb)
{
+ trace_btrfs_tree_read_unlock(eb);
/*
* if we're nested, we have the write lock. No new locking
* is needed as long as we are the lock owner.
@@ -281,6 +289,7 @@ void btrfs_tree_read_unlock(struct extent_buffer *eb)
*/
void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb)
{
+ trace_btrfs_tree_read_unlock_blocking(eb);
/*
* if we're nested, we have the write lock. No new locking
* is needed as long as we are the lock owner.
@@ -336,6 +345,7 @@ void btrfs_tree_unlock(struct extent_buffer *eb)
BUG_ON(blockers > 1);
btrfs_assert_tree_locked(eb);
+ trace_btrfs_tree_unlock(eb);
eb->lock_owner = 0;
btrfs_assert_tree_write_locks_put(eb);
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 */