diff options
Diffstat (limited to 'net/mptcp')
-rw-r--r-- | net/mptcp/pm_netlink.c | 4 | ||||
-rw-r--r-- | net/mptcp/protocol.c | 61 | ||||
-rw-r--r-- | net/mptcp/protocol.h | 2 | ||||
-rw-r--r-- | net/mptcp/sockopt.c | 24 |
4 files changed, 54 insertions, 37 deletions
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index 1c42bebca39e..bc343dab5e3f 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -1035,8 +1035,8 @@ static int mptcp_pm_nl_create_listen_socket(struct sock *sk, lock_sock(newsk); ssock = __mptcp_nmpc_socket(mptcp_sk(newsk)); release_sock(newsk); - if (!ssock) - return -EINVAL; + if (IS_ERR(ssock)) + return PTR_ERR(ssock); mptcp_info2sockaddr(&entry->addr, &addr, entry->addr.family); #if IS_ENABLED(CONFIG_MPTCP_IPV6) diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 22e073b373af..a676ac1bb9f1 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -49,18 +49,6 @@ static void __mptcp_check_send_data_fin(struct sock *sk); DEFINE_PER_CPU(struct mptcp_delegated_action, mptcp_delegated_actions); static struct net_device mptcp_napi_dev; -/* If msk has an initial subflow socket, and the MP_CAPABLE handshake has not - * completed yet or has failed, return the subflow socket. - * Otherwise return NULL. - */ -struct socket *__mptcp_nmpc_socket(const struct mptcp_sock *msk) -{ - if (!msk->subflow || READ_ONCE(msk->can_ack)) - return NULL; - - return msk->subflow; -} - /* Returns end sequence number of the receiver's advertised window */ static u64 mptcp_wnd_end(const struct mptcp_sock *msk) { @@ -116,6 +104,31 @@ static int __mptcp_socket_create(struct mptcp_sock *msk) return 0; } +/* If the MPC handshake is not started, returns the first subflow, + * eventually allocating it. + */ +struct socket *__mptcp_nmpc_socket(struct mptcp_sock *msk) +{ + struct sock *sk = (struct sock *)msk; + int ret; + + if (!((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN))) + return ERR_PTR(-EINVAL); + + if (!msk->subflow) { + if (msk->first) + return ERR_PTR(-EINVAL); + + ret = __mptcp_socket_create(msk); + if (ret) + return ERR_PTR(ret); + + mptcp_sockopt_sync(msk, msk->first); + } + + return msk->subflow; +} + static void mptcp_drop(struct sock *sk, struct sk_buff *skb) { sk_drops_add(sk, skb); @@ -1667,6 +1680,7 @@ static int mptcp_sendmsg_fastopen(struct sock *sk, struct msghdr *msg, { unsigned int saved_flags = msg->msg_flags; struct mptcp_sock *msk = mptcp_sk(sk); + struct socket *ssock; struct sock *ssk; int ret; @@ -1676,8 +1690,11 @@ static int mptcp_sendmsg_fastopen(struct sock *sk, struct msghdr *msg, * Since the defer_connect flag is cleared after the first succsful * fastopen attempt, no need to check for additional subflow status. */ - if (msg->msg_flags & MSG_FASTOPEN && !__mptcp_nmpc_socket(msk)) - return -EINVAL; + if (msg->msg_flags & MSG_FASTOPEN) { + ssock = __mptcp_nmpc_socket(msk); + if (IS_ERR(ssock)) + return PTR_ERR(ssock); + } if (!msk->first) return -EINVAL; @@ -2740,10 +2757,6 @@ static int mptcp_init_sock(struct sock *sk) if (unlikely(!net->mib.mptcp_statistics) && !mptcp_mib_alloc(net)) return -ENOMEM; - ret = __mptcp_socket_create(mptcp_sk(sk)); - if (ret) - return ret; - set_bit(SOCK_CUSTOM_SOCKOPT, &sk->sk_socket->flags); /* fetch the ca name; do it outside __mptcp_init_sock(), so that clone will @@ -3563,8 +3576,8 @@ static int mptcp_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len) int err = -EINVAL; ssock = __mptcp_nmpc_socket(msk); - if (!ssock) - return -EINVAL; + if (IS_ERR(ssock)) + return PTR_ERR(ssock); mptcp_token_destroy(msk); inet_sk_state_store(sk, TCP_SYN_SENT); @@ -3652,8 +3665,8 @@ static int mptcp_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) lock_sock(sock->sk); ssock = __mptcp_nmpc_socket(msk); - if (!ssock) { - err = -EINVAL; + if (IS_ERR(ssock)) { + err = PTR_ERR(ssock); goto unlock; } @@ -3689,8 +3702,8 @@ static int mptcp_listen(struct socket *sock, int backlog) lock_sock(sk); ssock = __mptcp_nmpc_socket(msk); - if (!ssock) { - err = -EINVAL; + if (IS_ERR(ssock)) { + err = PTR_ERR(ssock); goto unlock; } diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index a9eb0e428a6b..21eda9cd0c52 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -627,7 +627,7 @@ void mptcp_close_ssk(struct sock *sk, struct sock *ssk, void __mptcp_subflow_send_ack(struct sock *ssk); void mptcp_subflow_reset(struct sock *ssk); void mptcp_sock_graft(struct sock *sk, struct socket *parent); -struct socket *__mptcp_nmpc_socket(const struct mptcp_sock *msk); +struct socket *__mptcp_nmpc_socket(struct mptcp_sock *msk); bool __mptcp_close(struct sock *sk, long timeout); void mptcp_cancel_work(struct sock *sk); void mptcp_set_owner_r(struct sk_buff *skb, struct sock *sk); diff --git a/net/mptcp/sockopt.c b/net/mptcp/sockopt.c index b655cebda0f3..d4258869ac48 100644 --- a/net/mptcp/sockopt.c +++ b/net/mptcp/sockopt.c @@ -301,9 +301,9 @@ static int mptcp_setsockopt_sol_socket(struct mptcp_sock *msk, int optname, case SO_BINDTOIFINDEX: lock_sock(sk); ssock = __mptcp_nmpc_socket(msk); - if (!ssock) { + if (IS_ERR(ssock)) { release_sock(sk); - return -EINVAL; + return PTR_ERR(ssock); } ret = sock_setsockopt(ssock, SOL_SOCKET, optname, optval, optlen); @@ -396,9 +396,9 @@ static int mptcp_setsockopt_v6(struct mptcp_sock *msk, int optname, case IPV6_FREEBIND: lock_sock(sk); ssock = __mptcp_nmpc_socket(msk); - if (!ssock) { + if (IS_ERR(ssock)) { release_sock(sk); - return -EINVAL; + return PTR_ERR(ssock); } ret = tcp_setsockopt(ssock->sk, SOL_IPV6, optname, optval, optlen); @@ -693,9 +693,9 @@ static int mptcp_setsockopt_sol_ip_set_transparent(struct mptcp_sock *msk, int o lock_sock(sk); ssock = __mptcp_nmpc_socket(msk); - if (!ssock) { + if (IS_ERR(ssock)) { release_sock(sk); - return -EINVAL; + return PTR_ERR(ssock); } issk = inet_sk(ssock->sk); @@ -762,13 +762,15 @@ static int mptcp_setsockopt_first_sf_only(struct mptcp_sock *msk, int level, int { struct sock *sk = (struct sock *)msk; struct socket *sock; - int ret = -EINVAL; + int ret; /* Limit to first subflow, before the connection establishment */ lock_sock(sk); sock = __mptcp_nmpc_socket(msk); - if (!sock) + if (IS_ERR(sock)) { + ret = PTR_ERR(sock); goto unlock; + } ret = tcp_setsockopt(sock->sk, level, optname, optval, optlen); @@ -861,7 +863,7 @@ static int mptcp_getsockopt_first_sf_only(struct mptcp_sock *msk, int level, int { struct sock *sk = (struct sock *)msk; struct socket *ssock; - int ret = -EINVAL; + int ret; struct sock *ssk; lock_sock(sk); @@ -872,8 +874,10 @@ static int mptcp_getsockopt_first_sf_only(struct mptcp_sock *msk, int level, int } ssock = __mptcp_nmpc_socket(msk); - if (!ssock) + if (IS_ERR(ssock)) { + ret = PTR_ERR(ssock); goto out; + } ret = tcp_getsockopt(ssock->sk, level, optname, optval, optlen); |