[v8] Clarify when options can be used

[PATCH mptcp-next v8 7/8] mptcp: print out reset infos of MP_RST

Matthieu Baerts posted 8 patches 4 years, 1 month ago

Diff against v7 v9
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Maintainers: "David S. Miller" <davem@davemloft.net>, Geliang Tang <geliangtang@xiaomi.com>, Andrii Nakryiko <andrii@kernel.org>, Yonghong Song <yhs@fb.com>, John Fastabend <john.fastabend@gmail.com>, Paolo Abeni <pabeni@redhat.com>, KP Singh <kpsingh@kernel.org>, Shuah Khan <shuah@kernel.org>, Alexei Starovoitov <ast@kernel.org>, Jakub Kicinski <kuba@kernel.org>, Song Liu <songliubraving@fb.com>, Daniel Borkmann <daniel@iogearbox.net>, Mat Martineau <mathew.j.martineau@linux.intel.com>, Matthieu Baerts <matthieu.baerts@tessares.net>, Martin KaFai Lau <kafai@fb.com>

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[PATCH mptcp-next v8 7/8] mptcp: print out reset infos of MP_RST

Posted by Matthieu Baerts 4 years, 1 month ago

From: Geliang Tang <geliang.tang@suse.com>

This patch printed out the reset infos, reset_transient and reset_reason,
of MP_RST in mptcp_parse_option() to show that MP_RST is received.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
---
 net/mptcp/options.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index 06f64101d27b..182fb885f5e6 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -336,6 +336,8 @@ static void mptcp_parse_option(const struct sk_buff *skb,
 		flags = *ptr++;
 		mp_opt->reset_transient = flags & MPTCP_RST_TRANSIENT;
 		mp_opt->reset_reason = *ptr;
+		pr_debug("MP_RST: transient=%u reason=%u",
+			 mp_opt->reset_transient, mp_opt->reset_reason);
 		break;
 
 	case MPTCPOPT_MP_FAIL:
-- 
2.33.1