[MPTCP] [MPTCP][PATCH mptcp-next 3/3] mptcp: add tracepoint for subflow_check_data_avail

This patch added the tracepoint for subflow_check_data_avail to show the mapping status. Signed-off-by: Geliang Tang <geliangtang(a)gmail.com&gt; --- include/trace/events/mptcp.h | 26 ++++++++++++++++++++++++++ net/mptcp/subflow.c | 2 +- 2 files changed, 27 insertions(+), 1 deletion(-) diff --git a/include/trace/events/mptcp.h b/include/trace/events/mptcp.h index f06a7d33b237..29570009a7e4 100644 --- a/include/trace/events/mptcp.h +++ b/include/trace/events/mptcp.h @@ -7,6 +7,14 @@ #include <linux/tracepoint.h> +#define show_mapping_status(status) \ + __print_symbolic(status, \ + { 0, "MAPPING_OK" }, \ + { 1, "MAPPING_INVALID" }, \ + { 2, "MAPPING_EMPTY" }, \ + { 3, "MAPPING_DATA_FIN" }, \ + { 4, "MAPPING_DUMMY" }) + TRACE_EVENT(mptcp_subflow_get_send, TP_PROTO(struct mptcp_sock *msk, int nr_active, @@ -90,6 +98,24 @@ TRACE_EVENT(get_mapping_status, TP_printk("%s", __entry->str) ); +TRACE_EVENT(subflow_check_data_avail, + + TP_PROTO(__u8 status), + + TP_ARGS(status), + + TP_STRUCT__entry( + __field(__u8, status) + ), + + TP_fast_assign( + __entry->status = status; + ), + + TP_printk("mapping_status = %s", + show_mapping_status(__entry->status)) +); + #endif /* _TRACE_MPTCP_H */ /* This part must be outside protection */ diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 6f4145abd85e..0c5e1ec0d418 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -975,7 +975,7 @@ static bool subflow_check_data_avail(struct sock *ssk) u64 old_ack; status = get_mapping_status(ssk, msk); - pr_debug("msk=%p ssk=%p status=%d", msk, ssk, status); + trace_subflow_check_data_avail(status); if (status == MAPPING_INVALID) { ssk->sk_err = EBADMSG; goto fatal; -- 2.29.2