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| author | Paolo Abeni <pabeni@redhat.com> | 2024-01-16 20:18:47 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-26 02:35:59 +0300 |
| commit | 72b45857b7241305e362b85255559203d2635fd4 (patch) | |
| tree | f610e4e7c9f1239220d4e8862130580d092837e6 /net/mptcp/subflow.c | |
| parent | 9aeb09f4d85a87bac46c010d75a2ea299d462f28 (diff) | |
| download | linux-72b45857b7241305e362b85255559203d2635fd4.tar.xz | |
mptcp: relax check on MPC passive fallback
[ Upstream commit c0f5aec28edf98906d28f08daace6522adf9ee7a ]
While testing the blamed commit below, I was able to miss (!)
packetdrill failures in the fastopen test-cases.
On passive fastopen the child socket is created by incoming TCP MPC syn,
allow for both MPC_SYN and MPC_ACK header.
Fixes: 724b00c12957 ("mptcp: refine opt_mp_capable determination")
Reviewed-by: Matthieu Baerts <matttbe@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/mptcp/subflow.c')
| -rw-r--r-- | net/mptcp/subflow.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 70b7a47a53c7..d3c5ecf8ddf5 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -783,7 +783,8 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk, * options. */ mptcp_get_options(skb, &mp_opt); - if (!(mp_opt.suboptions & OPTION_MPTCP_MPC_ACK)) + if (!(mp_opt.suboptions & + (OPTION_MPTCP_MPC_SYN | OPTION_MPTCP_MPC_ACK))) fallback = true; } else if (subflow_req->mp_join) { |