diff mbox series

[net-next,5/6] mptcp: __mptcp_tcp_fallback() returns a struct sock

Message ID f4474c22d50669fa3702224677fd2c2541b83ca9.1593461586.git.dcaratti@redhat.com
State Deferred, archived
Headers show
Series MPTCP: improve fallback to TCP | expand

Commit Message

Davide Caratti June 29, 2020, 8:26 p.m. UTC 
From: Paolo Abeni <pabeni@redhat.com>

Currently __mptcp_tcp_fallback() always return NULL
on incoming connections, because MPTCP does not create
the additional socket for the first subflow.
Since the previous commit no __mptcp_tcp_fallback()
caller needs a struct socket, so let __mptcp_tcp_fallback()
return the first subflow sock and cope correctly even with
incoming connections.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
---
 net/mptcp/protocol.c | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

Comments

Mat Martineau June 29, 2020, 11:30 p.m. UTC | #1 
On Mon, 29 Jun 2020, Davide Caratti wrote:

> From: Paolo Abeni <pabeni@redhat.com>
>
> Currently __mptcp_tcp_fallback() always return NULL
> on incoming connections, because MPTCP does not create
> the additional socket for the first subflow.
> Since the previous commit no __mptcp_tcp_fallback()
> caller needs a struct socket, so let __mptcp_tcp_fallback()
> return the first subflow sock and cope correctly even with
> incoming connections.
>
> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
> Signed-off-by: Davide Caratti <dcaratti@redhat.com>
> ---
> net/mptcp/protocol.c | 22 ++++++++++------------
> 1 file changed, 10 insertions(+), 12 deletions(-)
>

Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>

--
Mat Martineau
Intel
diff mbox series

Patch

diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index ad619bda71cc..f2b2bd37e371 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -76,14 +76,14 @@  static bool mptcp_is_tcpsk(struct sock *sk)
 	return false;
 }
 
-static struct socket *__mptcp_tcp_fallback(struct mptcp_sock *msk)
+static struct sock *__mptcp_tcp_fallback(struct mptcp_sock *msk)
 {
 	sock_owned_by_me((const struct sock *)msk);
 
 	if (likely(!__mptcp_check_fallback(msk)))
 		return NULL;
 
-	return msk->subflow;
+	return msk->first;
 }
 
 static int __mptcp_socket_create(struct mptcp_sock *msk)
@@ -1498,7 +1498,7 @@  static int mptcp_setsockopt(struct sock *sk, int level, int optname,
 			    char __user *optval, unsigned int optlen)
 {
 	struct mptcp_sock *msk = mptcp_sk(sk);
-	struct socket *ssock;
+	struct sock *ssk;
 
 	pr_debug("msk=%p", msk);
 
@@ -1509,11 +1509,10 @@  static int mptcp_setsockopt(struct sock *sk, int level, int optname,
 	 * to the one remaining subflow.
 	 */
 	lock_sock(sk);
-	ssock = __mptcp_tcp_fallback(msk);
+	ssk = __mptcp_tcp_fallback(msk);
 	release_sock(sk);
-	if (ssock)
-		return tcp_setsockopt(ssock->sk, level, optname, optval,
-				      optlen);
+	if (ssk)
+		return tcp_setsockopt(ssk, level, optname, optval, optlen);
 
 	return -EOPNOTSUPP;
 }
@@ -1522,7 +1521,7 @@  static int mptcp_getsockopt(struct sock *sk, int level, int optname,
 			    char __user *optval, int __user *option)
 {
 	struct mptcp_sock *msk = mptcp_sk(sk);
-	struct socket *ssock;
+	struct sock *ssk;
 
 	pr_debug("msk=%p", msk);
 
@@ -1533,11 +1532,10 @@  static int mptcp_getsockopt(struct sock *sk, int level, int optname,
 	 * to the one remaining subflow.
 	 */
 	lock_sock(sk);
-	ssock = __mptcp_tcp_fallback(msk);
+	ssk = __mptcp_tcp_fallback(msk);
 	release_sock(sk);
-	if (ssock)
-		return tcp_getsockopt(ssock->sk, level, optname, optval,
-				      option);
+	if (ssk)
+		return tcp_getsockopt(ssk, level, optname, optval, option);
 
 	return -EOPNOTSUPP;
 }