From: Michael Jeanson <mjeanson@efficios.com>
Date: Tue, 9 Jan 2018 22:40:00 +0000 (-0500)
Subject: Fix: btrfs_delayed_ref_head was unwired since v3.12
X-Git-Tag: v2.11.0-rc1~85
X-Git-Url: http://git.lttng.org/?p=lttng-modules.git;a=commitdiff_plain;h=ab9ebe67d2b52f5ee2099e08ab914f96eeb9a5a1

Fix: btrfs_delayed_ref_head was unwired since v3.12

See upstream commit:

  commit 599c75ec3f7f3b606e8a0a684c00f12190712de8
  Author: Liu Bo <bo.li.liu@oracle.com>
  Date:   Tue Jul 16 19:03:36 2013 +0800

    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: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/instrumentation/events/lttng-module/btrfs.h b/instrumentation/events/lttng-module/btrfs.h
index b529e8e0..e7b4b0c6 100644
--- a/instrumentation/events/lttng-module/btrfs.h
+++ b/instrumentation/events/lttng-module/btrfs.h
@@ -680,8 +680,81 @@ LTTNG_TRACEPOINT_EVENT(btrfs_delayed_data_ref,
 	)
 )
 
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,8,0))
-LTTNG_TRACEPOINT_EVENT(btrfs_delayed_ref_head,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,15,0))
+LTTNG_TRACEPOINT_EVENT_CLASS(btrfs_delayed_ref_head,
+
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_delayed_ref_head *head_ref,
+		 int action),
+
+	TP_ARGS(fs_info, head_ref, action),
+
+	TP_FIELDS(
+		ctf_integer(u64, bytenr, head_ref->bytenr)
+		ctf_integer(u64, num_bytes, head_ref->num_bytes)
+		ctf_integer(int, action, action)
+		ctf_integer(int, is_data, head_ref->is_data)
+	)
+)
+
+LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs_delayed_ref_head, add_delayed_ref_head,
+
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_delayed_ref_head *head_ref,
+		 int action),
+
+	TP_ARGS(fs_info, head_ref, action)
+)
+
+LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs_delayed_ref_head, run_delayed_ref_head,
+
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_delayed_ref_head *head_ref,
+		 int action),
+
+	TP_ARGS(fs_info, head_ref, action)
+)
+
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0))
+LTTNG_TRACEPOINT_EVENT_CLASS(btrfs_delayed_ref_head,
+
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_delayed_ref_node *ref,
+		 const struct btrfs_delayed_ref_head *head_ref,
+		 int action),
+
+	TP_ARGS(fs_info, ref, head_ref, action),
+
+	TP_FIELDS(
+		ctf_integer(u64, bytenr, ref->bytenr)
+		ctf_integer(u64, num_bytes, ref->num_bytes)
+		ctf_integer(int, action, action)
+		ctf_integer(int, is_data, head_ref->is_data)
+	)
+)
+
+LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs_delayed_ref_head, add_delayed_ref_head,
+
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_delayed_ref_node *ref,
+		 const struct btrfs_delayed_ref_head *head_ref,
+		 int action),
+
+	TP_ARGS(fs_info, ref, head_ref, action)
+)
+
+LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs_delayed_ref_head, run_delayed_ref_head,
+
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_delayed_ref_node *ref,
+		 const struct btrfs_delayed_ref_head *head_ref,
+		 int action),
+
+	TP_ARGS(fs_info, ref, head_ref, action)
+)
+
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,8,0))
+LTTNG_TRACEPOINT_EVENT_CLASS(btrfs_delayed_ref_head,
 
 	TP_PROTO(struct btrfs_fs_info *fs_info,
 		 struct btrfs_delayed_ref_node *ref,
@@ -698,6 +771,61 @@ LTTNG_TRACEPOINT_EVENT(btrfs_delayed_ref_head,
 	)
 )
 
+LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs_delayed_ref_head, add_delayed_ref_head,
+
+	TP_PROTO(struct btrfs_fs_info *fs_info,
+		 struct btrfs_delayed_ref_node *ref,
+		 struct btrfs_delayed_ref_head *head_ref,
+		 int action),
+
+	TP_ARGS(fs_info, ref, head_ref, action)
+)
+
+LTTNG_TRACEPOINT_EVENT_INSTANCE(btrfs_delayed_ref_head, run_delayed_ref_head,
+
+	TP_PROTO(struct btrfs_fs_info *fs_info,
+		 struct btrfs_delayed_ref_node *ref,
+		 struct btrfs_delayed_ref_head *head_ref,
+		 int action),
+
+	TP_ARGS(fs_info, ref, head_ref, action)
+)
+
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
+LTTNG_TRACEPOINT_EVENT_CLASS(btrfs_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),
+
+	TP_FIELDS(
+		ctf_integer(u64, bytenr, ref->bytenr)
+		ctf_integer(u64, num_bytes, ref->num_bytes)
+		ctf_integer(int, action, action)
+		ctf_integer(int, is_data, head_ref->is_data)
+	)
+)
+
+LTTNG_TRACEPOINT_EVENT_INSTANCE(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)
+)
+
+LTTNG_TRACEPOINT_EVENT_INSTANCE(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)
+)
+
 #else
 LTTNG_TRACEPOINT_EVENT(btrfs_delayed_ref_head,