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: Liu Bo <bo.li....@oracle.com>
---
fs/btrfs/delayed-ref.c | 6 ++--
fs/btrfs/extent-tree.c | 6 ++++
include/trace/events/btrfs.h | 60 +++++++++++++++++++++++++++++++++++++++--
3 files changed, 66 insertions(+), 6 deletions(-)
diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c
index c219463..f7be9f7 100644
--- a/fs/btrfs/delayed-ref.c
+++ b/fs/btrfs/delayed-ref.c
@@ -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);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 2796622..70002ea 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2022,6 +2022,8 @@ 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
@@ -2165,6 +2167,8 @@ 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
@@ -2223,6 +2227,8 @@ 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);
diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index 2902657..45702c3 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -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" }, \
--
1.7.7
--
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