[RFC PATCH 02/38] blktrace_api: add new trace definition

This patch adds new structure similar to struct blk_trace to support
block trace extensions.

Signed-off-by: Chaitanya Kulkarni <[email protected]>
---
 include/linux/blktrace_api.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h
index 05556573b896..b48210b89dbe 100644
--- a/include/linux/blktrace_api.h
+++ b/include/linux/blktrace_api.h
@@ -29,6 +29,24 @@ struct blk_trace {
 	atomic_t dropped;
 };
 
+struct blk_trace_ext {
+	int trace_state;
+	struct rchan *rchan;
+	unsigned long __percpu *sequence;
+	unsigned char __percpu *msg_data;
+	u64 act_mask;
+	u32 prio_mask;
+	u64 start_lba;
+	u64 end_lba;
+	u32 pid;
+	u32 dev;
+	struct dentry *dir;
+	struct dentry *dropped_file;
+	struct dentry *msg_file;
+	struct list_head running_ext_list;
+	atomic_t dropped;
+};
+
 struct blkcg;
 
 extern int blk_trace_ioctl(struct block_device *, unsigned, char __user *);
-- 
2.22.1