From fc518953bc9c8d7d33c6ab261995f5038f3c87f9 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Fri, 27 Mar 2020 14:48:50 -0700 Subject: mptcp: add and use MIB counter infrastructure Exported via same /proc file as the Linux TCP MIB counters, so "netstat -s" or "nstat" will show them automatically. The MPTCP MIB counters are allocated in a distinct pcpu area in order to avoid bloating/wasting TCP pcpu memory. Counters are allocated once the first MPTCP socket is created in a network namespace and free'd on exit. If no sockets have been allocated, all-zero mptcp counters are shown. The MIB counter list is taken from the multipath-tcp.org kernel, but only a few counters have been picked up so far. The counter list can be increased at any time later on. v2 -> v3: - remove 'inline' in foo.c files (David S. Miller) Co-developed-by: Paolo Abeni Signed-off-by: Paolo Abeni Signed-off-by: Florian Westphal Signed-off-by: Mat Martineau Signed-off-by: David S. Miller --- include/net/mptcp.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/net/mptcp.h') diff --git a/include/net/mptcp.h b/include/net/mptcp.h index b648fa20eec8..0e7c5471010b 100644 --- a/include/net/mptcp.h +++ b/include/net/mptcp.h @@ -12,6 +12,8 @@ #include #include +struct seq_file; + /* MPTCP sk_buff extension data */ struct mptcp_ext { u64 data_ack; @@ -123,6 +125,7 @@ static inline bool mptcp_skb_can_collapse(const struct sk_buff *to, bool mptcp_sk_is_subflow(const struct sock *sk); +void mptcp_seq_show(struct seq_file *seq); #else static inline void mptcp_init(void) @@ -194,6 +197,7 @@ static inline bool mptcp_sk_is_subflow(const struct sock *sk) return false; } +static inline void mptcp_seq_show(struct seq_file *seq) { } #endif /* CONFIG_MPTCP */ #if IS_ENABLED(CONFIG_MPTCP_IPV6) -- cgit v1.2.3