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mptcp: reset last_snd on subflow close 

Send logic caches last active subflow in the msk, so it needs to be
cleared when the cached subflow is closed.

Fixes: d5f49190de ("mptcp: allow picking different xmit subflows")
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/155
Reported-by: Christoph Paasch <cpaasch@apple.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
rM2-mainline
Florian Westphal 2021-03-04 13:32:08 -08:00 committed by David S. Miller
parent bfc2560563
commit e0be4931f3
1 changed files with 5 additions and 0 deletions
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5
net/mptcp/protocol.c
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@ -2126,6 +2126,8 @@ static struct sock *mptcp_subflow_get_retrans(const struct mptcp_sock *msk)
static void __mptcp_close_ssk(struct sock *sk, struct sock *ssk,
struct mptcp_subflow_context *subflow)
{
struct mptcp_sock *msk = mptcp_sk(sk);
list_del(&subflow->node);
lock_sock_nested(ssk, SINGLE_DEPTH_NESTING);
@ -2154,6 +2156,9 @@ static void __mptcp_close_ssk(struct sock *sk, struct sock *ssk,
release_sock(ssk);
sock_put(ssk);
if (ssk == msk->last_snd)
msk->last_snd = NULL;
}
void mptcp_close_ssk(struct sock *sk, struct sock *ssk,