[PATCH v2 09/15] blktrace: add definitions for struct blk_io_trace2

Johannes Thumshirn
2025-09-25T15:03:14Z

Add definitions for the extended version of the blktrace protocol using a
wider action type to be able to record new actions in the kernel.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
---
include/uapi/linux/blktrace_api.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/include/uapi/linux/blktrace_api.h b/include/uapi/linux/blktrace_api.h
index a3b1f35ac026..d58ef484de49 100644
--- a/include/uapi/linux/blktrace_api.h
+++ b/include/uapi/linux/blktrace_api.h
@@ -94,6 +94,7 @@ enum blktrace_notify {

#define BLK_IO_TRACE_MAGIC 0x65617400
#define BLK_IO_TRACE_VERSION 0x07
+#define BLK_IO_TRACE2_VERSION 0x08

/*
* The trace itself
@@ -113,6 +114,21 @@ struct blk_io_trace {
/* cgroup id will be stored here if exists */
};

+struct blk_io_trace2 {
+ __u32 magic; /* MAGIC << 8 | BLK_IO_TRACE2_VERSION */
+ __u32 sequence; /* event number */
+ __u64 time; /* in nanoseconds */
+ __u64 sector; /* disk offset */
+ __u32 bytes; /* transfer length */
+ __u32 pid; /* who did it */
+ __u64 action; /* what happened */
+ __u32 device; /* device number */
+ __u32 cpu; /* on what cpu did it happen */
+ __u16 error; /* completion error */
+ __u16 pdu_len; /* length of data after this trace */
+ __u8 pad[8];
+ /* cgroup id will be stored here if exists */
+};
/*
* The remap event
*/
--
2.51.0