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Commit 599c75ec authored by Liu Bo's avatar Liu Bo Committed by Chris Mason
Browse files

Btrfs/tracepoint: update delayed ref tracepoints 



This shows exactly how btrfs processes the delayed refs onto disks,
which is very helpful on understanding delayed ref mechanism and
debugging related bugs.

Signed-off-by: default avatarLiu Bo <bo.li.liu@oracle.com>
Signed-off-by: default avatarJosef Bacik <jbacik@fusionio.com>
Signed-off-by: default avatarChris Mason <chris.mason@fusionio.com>
parent 1095cc0d

fs/btrfs/delayed-ref.c

+3 −3
Original line number Diff line number Diff line
@@ -600,7 +600,7 @@ static noinline void add_delayed_ref_head(struct btrfs_fs_info *fs_info, 
	INIT_LIST_HEAD(&head_ref->cluster);

	mutex_init(&head_ref->mutex);



	trace_btrfs_delayed_ref_head(ref, head_ref, action);

	trace_add_delayed_ref_head(ref, head_ref, action);



	existing = tree_insert(&delayed_refs->root, &ref->rb_node);
@@ -661,7 +661,7 @@ static noinline void add_delayed_tree_ref(struct btrfs_fs_info *fs_info, 
		ref->type = BTRFS_TREE_BLOCK_REF_KEY;

	full_ref->level = level;



	trace_btrfs_delayed_tree_ref(ref, full_ref, action);

	trace_add_delayed_tree_ref(ref, full_ref, action);



	existing = tree_insert(&delayed_refs->root, &ref->rb_node);
@@ -722,7 +722,7 @@ static noinline void add_delayed_data_ref(struct btrfs_fs_info *fs_info, 
	full_ref->objectid = owner;

	full_ref->offset = offset;



	trace_btrfs_delayed_data_ref(ref, full_ref, action);

	trace_add_delayed_data_ref(ref, full_ref, action);



	existing = tree_insert(&delayed_refs->root, &ref->rb_node);

fs/btrfs/extent-tree.c

+6 −0
Original line number Diff line number Diff line
@@ -2035,6 +2035,8 @@ static int run_delayed_data_ref(struct btrfs_trans_handle *trans, 
	ins.type = BTRFS_EXTENT_ITEM_KEY;



	ref = btrfs_delayed_node_to_data_ref(node);

	trace_run_delayed_data_ref(node, ref, node->action);



	if (node->type == BTRFS_SHARED_DATA_REF_KEY)

		parent = ref->parent;

	else
@@ -2178,6 +2180,8 @@ static int run_delayed_tree_ref(struct btrfs_trans_handle *trans, 
						 SKINNY_METADATA);



	ref = btrfs_delayed_node_to_tree_ref(node);

	trace_run_delayed_tree_ref(node, ref, node->action);



	if (node->type == BTRFS_SHARED_BLOCK_REF_KEY)

		parent = ref->parent;

	else
@@ -2236,6 +2240,8 @@ static int run_one_delayed_ref(struct btrfs_trans_handle *trans, 
		 */

		BUG_ON(extent_op);

		head = btrfs_delayed_node_to_head(node);

		trace_run_delayed_ref_head(node, head, node->action);



		if (insert_reserved) {

			btrfs_pin_extent(root, node->bytenr,

					 node->num_bytes, 1);

include/trace/events/btrfs.h

+57 −3
Original line number Diff line number Diff line
@@ -439,7 +439,7 @@ TRACE_EVENT(btrfs_sync_fs, 
		{ BTRFS_UPDATE_DELAYED_HEAD, "UPDATE_DELAYED_HEAD" })

			



TRACE_EVENT(btrfs_delayed_tree_ref,

DECLARE_EVENT_CLASS(btrfs_delayed_tree_ref,



	TP_PROTO(struct btrfs_delayed_ref_node *ref,

		 struct btrfs_delayed_tree_ref *full_ref,
@@ -481,7 +481,25 @@ TRACE_EVENT(btrfs_delayed_tree_ref, 
		  (unsigned long long)__entry->seq)

);



TRACE_EVENT(btrfs_delayed_data_ref,

DEFINE_EVENT(btrfs_delayed_tree_ref,  add_delayed_tree_ref,



	TP_PROTO(struct btrfs_delayed_ref_node *ref,

		 struct btrfs_delayed_tree_ref *full_ref,

		 int action),



	TP_ARGS(ref, full_ref, action)

);



DEFINE_EVENT(btrfs_delayed_tree_ref,  run_delayed_tree_ref,



	TP_PROTO(struct btrfs_delayed_ref_node *ref,

		 struct btrfs_delayed_tree_ref *full_ref,

		 int action),



	TP_ARGS(ref, full_ref, action)

);



DECLARE_EVENT_CLASS(btrfs_delayed_data_ref,



	TP_PROTO(struct btrfs_delayed_ref_node *ref,

		 struct btrfs_delayed_data_ref *full_ref,
@@ -527,7 +545,25 @@ TRACE_EVENT(btrfs_delayed_data_ref, 
		  (unsigned long long)__entry->seq)

);



TRACE_EVENT(btrfs_delayed_ref_head,

DEFINE_EVENT(btrfs_delayed_data_ref,  add_delayed_data_ref,



	TP_PROTO(struct btrfs_delayed_ref_node *ref,

		 struct btrfs_delayed_data_ref *full_ref,

		 int action),



	TP_ARGS(ref, full_ref, action)

);



DEFINE_EVENT(btrfs_delayed_data_ref,  run_delayed_data_ref,



	TP_PROTO(struct btrfs_delayed_ref_node *ref,

		 struct btrfs_delayed_data_ref *full_ref,

		 int action),



	TP_ARGS(ref, full_ref, action)

);



DECLARE_EVENT_CLASS(btrfs_delayed_ref_head,



	TP_PROTO(struct btrfs_delayed_ref_node *ref,

		 struct btrfs_delayed_ref_head *head_ref,
@@ -556,6 +592,24 @@ TRACE_EVENT(btrfs_delayed_ref_head, 
		  __entry->is_data)

);



DEFINE_EVENT(btrfs_delayed_ref_head,  add_delayed_ref_head,



	TP_PROTO(struct btrfs_delayed_ref_node *ref,

		 struct btrfs_delayed_ref_head *head_ref,

		 int action),



	TP_ARGS(ref, head_ref, action)

);



DEFINE_EVENT(btrfs_delayed_ref_head,  run_delayed_ref_head,



	TP_PROTO(struct btrfs_delayed_ref_node *ref,

		 struct btrfs_delayed_ref_head *head_ref,

		 int action),



	TP_ARGS(ref, head_ref, action)

);



#define show_chunk_type(type)					\

	__print_flags(type, "|",				\

		{ BTRFS_BLOCK_GROUP_DATA, 	"DATA"	},	\