[PATCH net-next 5/8] mptcp: add tracepoint in get_mapping_status

[Mat Martineau]

From: Geliang Tang <geliangt...@gmail.com>

This patch added a tracepoint in the mapping status function
get_mapping_status() to dump every mpext field.

Suggested-by: Paolo Abeni <pab...@redhat.com>
Acked-by: Paolo Abeni <pab...@redhat.com>
Signed-off-by: Geliang Tang <geliangt...@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martin...@linux.intel.com>
---
 include/trace/events/mptcp.h | 52 ++++++++++++++++++++++++++++++++++++
 net/mptcp/subflow.c          |  6 ++---
 2 files changed, 55 insertions(+), 3 deletions(-)

diff --git a/include/trace/events/mptcp.h b/include/trace/events/mptcp.h
index b1617a0162da..ec20350d82eb 100644
--- a/include/trace/events/mptcp.h
+++ b/include/trace/events/mptcp.h
@@ -54,6 +54,58 @@ TRACE_EVENT(mptcp_subflow_get_send,
                  __entry->backup, __entry->ratio)
 );
 
+DECLARE_EVENT_CLASS(mptcp_dump_mpext,
+
+       TP_PROTO(struct mptcp_ext *mpext),
+
+       TP_ARGS(mpext),
+
+       TP_STRUCT__entry(
+               __field(u64, data_ack)
+               __field(u64, data_seq)
+               __field(u32, subflow_seq)
+               __field(u16, data_len)
+               __field(u8, use_map)
+               __field(u8, dsn64)
+               __field(u8, data_fin)
+               __field(u8, use_ack)
+               __field(u8, ack64)
+               __field(u8, mpc_map)
+               __field(u8, frozen)
+               __field(u8, reset_transient)
+               __field(u8, reset_reason)
+       ),
+
+       TP_fast_assign(
+               __entry->data_ack = mpext->ack64 ? mpext->data_ack : 
mpext->data_ack32;
+               __entry->data_seq = mpext->data_seq;
+               __entry->subflow_seq = mpext->subflow_seq;
+               __entry->data_len = mpext->data_len;
+               __entry->use_map = mpext->use_map;
+               __entry->dsn64 = mpext->dsn64;
+               __entry->data_fin = mpext->data_fin;
+               __entry->use_ack = mpext->use_ack;
+               __entry->ack64 = mpext->ack64;
+               __entry->mpc_map = mpext->mpc_map;
+               __entry->frozen = mpext->frozen;
+               __entry->reset_transient = mpext->reset_transient;
+               __entry->reset_reason = mpext->reset_reason;
+       ),
+
+       TP_printk("data_ack=%llu data_seq=%llu subflow_seq=%u data_len=%u 
use_map=%u dsn64=%u data_fin=%u use_ack=%u ack64=%u mpc_map=%u frozen=%u 
reset_transient=%u reset_reason=%u",
+                 __entry->data_ack, __entry->data_seq,
+                 __entry->subflow_seq, __entry->data_len,
+                 __entry->use_map, __entry->dsn64,
+                 __entry->data_fin, __entry->use_ack,
+                 __entry->ack64, __entry->mpc_map,
+                 __entry->frozen, __entry->reset_transient,
+                 __entry->reset_reason)
+);
+
+DEFINE_EVENT(mptcp_dump_mpext, get_mapping_status,
+       TP_PROTO(struct mptcp_ext *mpext),
+       TP_ARGS(mpext));
+
 #endif /* _TRACE_MPTCP_H */
 
 /* This part must be outside protection */
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index c3da84576b3c..d8a2a55ae916 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -25,6 +25,8 @@
 #include "protocol.h"
 #include "mib.h"
 
+#include <trace/events/mptcp.h>
+
 static void mptcp_subflow_ops_undo_override(struct sock *ssk);
 
 static void SUBFLOW_REQ_INC_STATS(struct request_sock *req,
@@ -862,9 +864,7 @@ static enum mapping_status get_mapping_status(struct sock 
*ssk,
                goto validate_seq;
        }
 
-       pr_debug("seq=%llu is64=%d ssn=%u data_len=%u data_fin=%d",
-                mpext->data_seq, mpext->dsn64, mpext->subflow_seq,
-                mpext->data_len, mpext->data_fin);
+       trace_get_mapping_status(mpext);
 
        data_len = mpext->data_len;
        if (data_len == 0) {
-- 
2.31.1