[PATCH v8 10/11] btrfs: add trace events for RST

[Johannes Thumshirn <johannes.thumshirn@wdc.com>]

Add trace events for raid-stripe-tree operations.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
---
 fs/btrfs/raid-stripe-tree.c  |  8 +++++
 include/trace/events/btrfs.h | 75 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 83 insertions(+)

diff --git a/fs/btrfs/raid-stripe-tree.c b/fs/btrfs/raid-stripe-tree.c
index 7ed02e4b79ec..5a9952cf557c 100644
--- a/fs/btrfs/raid-stripe-tree.c
+++ b/fs/btrfs/raid-stripe-tree.c
@@ -62,6 +62,9 @@ int btrfs_delete_raid_extent(struct btrfs_trans_handle *trans, u64 start,
 		if (found_end <= start)
 			break;
 
+		trace_btrfs_raid_extent_delete(fs_info, start, end,
+					       found_start, found_end);
+
 		ASSERT(found_start >= start && found_end <= end);
 		ret = btrfs_del_item(trans, stripe_root, path);
 		if (ret)
@@ -120,6 +123,8 @@ static int btrfs_insert_one_raid_extent(struct btrfs_trans_handle *trans,
 		return -ENOMEM;
 	}
 
+	trace_btrfs_insert_one_raid_extent(fs_info, bioc->logical, bioc->size,
+					   num_stripes);
 	btrfs_set_stack_stripe_extent_encoding(stripe_extent, encoding);
 	for (int i = 0; i < num_stripes; i++) {
 		u64 devid = bioc->stripes[i].dev->devid;
@@ -445,6 +450,9 @@ int btrfs_get_raid_extent_offset(struct btrfs_fs_info *fs_info,
 
 		stripe->physical = physical + offset;
 
+		trace_btrfs_get_raid_extent_offset(fs_info, logical, *length,
+						   stripe->physical, devid);
+
 		ret = 0;
 		goto free_path;
 	}
diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index b2db2c2f1c57..e2c6f1199212 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -2497,6 +2497,81 @@ DEFINE_EVENT(btrfs_raid56_bio, raid56_write,
 	TP_ARGS(rbio, bio, trace_info)
 );
 
+TRACE_EVENT(btrfs_insert_one_raid_extent,
+
+	TP_PROTO(struct btrfs_fs_info *fs_info, u64 logical, u64 length,
+		 int num_stripes),
+
+	TP_ARGS(fs_info, logical, length, num_stripes),
+
+	TP_STRUCT__entry_btrfs(
+		__field(	u64,	logical		)
+		__field(	u64,	length		)
+		__field(	int,	num_stripes	)
+	),
+
+	TP_fast_assign_btrfs(fs_info,
+		__entry->logical	= logical;
+		__entry->length		= length;
+		__entry->num_stripes	= num_stripes;
+	),
+
+	TP_printk_btrfs("logical=%llu, length=%llu, num_stripes=%d",
+			__entry->logical, __entry->length,
+			__entry->num_stripes)
+);
+
+TRACE_EVENT(btrfs_raid_extent_delete,
+
+	TP_PROTO(struct btrfs_fs_info *fs_info, u64 start, u64 end,
+		 u64 found_start, u64 found_end),
+
+	TP_ARGS(fs_info, start, end, found_start, found_end),
+
+	TP_STRUCT__entry_btrfs(
+		__field(	u64,	start		)
+		__field(	u64,	end		)
+		__field(	u64,	found_start	)
+		__field(	u64,	found_end	)
+	),
+
+	TP_fast_assign_btrfs(fs_info,
+		__entry->start	=	start;
+		__entry->end	=	end;
+		__entry->found_start =	found_start;
+		__entry->found_end =	found_end;
+	),
+
+	TP_printk_btrfs("start=%llu, end=%llu, found_start=%llu, found_end=%llu",
+			__entry->start, __entry->end, __entry->found_start,
+			__entry->found_end)
+);
+
+TRACE_EVENT(btrfs_get_raid_extent_offset,
+
+	TP_PROTO(struct btrfs_fs_info *fs_info, u64 logical, u64 length,
+		 u64 physical, u64 devid),
+
+	TP_ARGS(fs_info, logical, length, physical, devid),
+
+	TP_STRUCT__entry_btrfs(
+		__field(	u64,	logical		)
+		__field(	u64,	length		)
+		__field(	u64,	physical	)
+		__field(	u64,	devid	)
+	),
+
+	TP_fast_assign_btrfs(fs_info,
+		__entry->logical	=	logical;
+		__entry->length		=	length;
+		__entry->physical	=	physical;
+		__entry->devid		=	devid;
+	),
+
+	TP_printk_btrfs("logical=%llu, length=%llu, physical=%llu, devid=%llu",
+			__entry->logical, __entry->length, __entry->physical,
+			__entry->devid)
+);
 #endif /* _TRACE_BTRFS_H */
 
 /* This part must be outside protection */

-- 
2.41.0