[PATCH net-next 03/14] mptcp: avoid subflow socket usage in mptcp_get_port()

Matthieu Baerts
2023-08-11T15:58:52Z

We are going to remove the first subflow socket soon, so avoid
accessing it in mptcp_get_port(). Instead, access directly the
first subflow sock.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
---
net/mptcp/protocol.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index b888d6339c80..891f49722263 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -3405,14 +3405,12 @@ static void mptcp_unhash(struct sock *sk)
static int mptcp_get_port(struct sock *sk, unsigned short snum)
{
struct mptcp_sock *msk = mptcp_sk(sk);
- struct socket *ssock;

- ssock = msk->subflow;
- pr_debug("msk=%p, subflow=%p", msk, ssock);
- if (WARN_ON_ONCE(!ssock))
+ pr_debug("msk=%p, ssk=%p", msk, msk->first);
+ if (WARN_ON_ONCE(!msk->first))
return -EINVAL;

- return inet_csk_get_port(ssock->sk, snum);
+ return inet_csk_get_port(msk->first, snum);
}

void mptcp_finish_connect(struct sock *ssk)

--
2.40.1