From 3aa362494170142406228e45860d6f4e48595d54 Mon Sep 17 00:00:00 2001 From: Paolo Abeni Date: Fri, 11 Aug 2023 17:57:24 +0200 Subject: [PATCH] mptcp: avoid ssock usage in mptcp_pm_nl_create_listen_socket() This is one of the few remaining spots actually manipulating the first subflow socket. We can leverage the recently introduced inet helpers to get rid of ssock there. No functional changes intended. Signed-off-by: Paolo Abeni Reviewed-by: Mat Martineau Signed-off-by: Matthieu Baerts Signed-off-by: David S. Miller --- net/mptcp/pm_netlink.c | 24 +++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-) diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index 5692daf57a4d8a..ae36155ff12867 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -1005,8 +1006,8 @@ static int mptcp_pm_nl_create_listen_socket(struct sock *sk, bool is_ipv6 = sk->sk_family == AF_INET6; int addrlen = sizeof(struct sockaddr_in); struct sockaddr_storage addr; + struct sock *newsk, *ssk; struct socket *ssock; - struct sock *newsk; int backlog = 1024; int err; @@ -1042,18 +1043,23 @@ static int mptcp_pm_nl_create_listen_socket(struct sock *sk, if (entry->addr.family == AF_INET6) addrlen = sizeof(struct sockaddr_in6); #endif - err = kernel_bind(ssock, (struct sockaddr *)&addr, addrlen); + ssk = mptcp_sk(newsk)->first; + if (ssk->sk_family == AF_INET) + err = inet_bind_sk(ssk, (struct sockaddr *)&addr, addrlen); +#if IS_ENABLED(CONFIG_MPTCP_IPV6) + else if (ssk->sk_family == AF_INET6) + err = inet6_bind_sk(ssk, (struct sockaddr *)&addr, addrlen); +#endif if (err) return err; inet_sk_state_store(newsk, TCP_LISTEN); - err = kernel_listen(ssock, backlog); - if (err) - return err; - - mptcp_event_pm_listener(ssock->sk, MPTCP_EVENT_LISTENER_CREATED); - - return 0; + lock_sock(ssk); + err = __inet_listen_sk(ssk, backlog); + if (!err) + mptcp_event_pm_listener(ssk, MPTCP_EVENT_LISTENER_CREATED); + release_sock(ssk); + return err; } int mptcp_pm_nl_get_local_id(struct mptcp_sock *msk, struct mptcp_addr_info *skc)