[Devel] [PATCH VZ9 7/10] fs/fuse/kio: extend ktrace protocol to carry aux info

[Alexey Kuznetsov]

This is only protocol definition. This extension is backward
comaptible way to transfer additional information in ktrace messages.
The extension is especially important for libpcs_blog and vstorage-mount,
but here we are ging to use it to log mre detaile timings and cpu
affinity information.

Signed-off-by: Alexey Kuznetsov <kuznet at virtuozzo.com>
---
 fs/fuse/kio/pcs/fuse_ktrace_prot.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/fs/fuse/kio/pcs/fuse_ktrace_prot.h b/fs/fuse/kio/pcs/fuse_ktrace_prot.h
index 3c985f9..53356c7 100644
--- a/fs/fuse/kio/pcs/fuse_ktrace_prot.h
+++ b/fs/fuse/kio/pcs/fuse_ktrace_prot.h
@@ -47,4 +47,20 @@ struct fuse_tr_iotimes_cs
 	__u32	ts_io;
 };
 
+struct fuse_tr_iotimes_aux {
+	__u32	ts_dio;
+	__u8	cpus[4];
+};
+
+#define FUSE_TR_ATTR_MAGIC	0xF8AC
+#define FUSE_TR_ATTR_PAD	0
+#define FUSE_TR_ATTR_NAME	1
+#define FUSE_TR_ATTR_AUX	2
+
+struct fuse_tr_attr {
+	__u16	magic;
+	__u16	type;
+	__u32	len;
+};
+
 #endif /* _FUSE_KTRACE_PROT_H_ */
-- 
1.8.3.1