From: Geliang Tang <geliang.tang@xxxxxxxxx> This patch replaces all the 'inet_sk_state_store()' calls under net/mptcp with the new helper mptcp_set_state(). Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/460 Signed-off-by: Geliang Tang <geliang.tang@xxxxxxxxx> Acked-by: Paolo Abeni <pabeni@xxxxxxxxxx> Reviewed-by: Matthieu Baerts <matttbe@xxxxxxxxxx> Signed-off-by: Matthieu Baerts <matttbe@xxxxxxxxxx> --- net/mptcp/pm_netlink.c | 5 +++++ net/mptcp/protocol.c | 38 +++++++++++++++++++------------------- net/mptcp/subflow.c | 2 +- 3 files changed, 25 insertions(+), 20 deletions(-) diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index bf4d96f6f99a..661c226dad18 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -1048,6 +1048,11 @@ static int mptcp_pm_nl_create_listen_socket(struct sock *sk, if (err) return err; + /* We don't use mptcp_set_state() here because it needs to be called + * under the msk socket lock. For the moment, that will not bring + * anything more than only calling inet_sk_state_store(), because the + * old status is known (TCP_CLOSE). + */ inet_sk_state_store(newsk, TCP_LISTEN); lock_sock(ssk); err = __inet_listen_sk(ssk, backlog); diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index b555bd0b425b..b43762e64dc5 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -443,11 +443,11 @@ static void mptcp_check_data_fin_ack(struct sock *sk) switch (sk->sk_state) { case TCP_FIN_WAIT1: - inet_sk_state_store(sk, TCP_FIN_WAIT2); + mptcp_set_state(sk, TCP_FIN_WAIT2); break; case TCP_CLOSING: case TCP_LAST_ACK: - inet_sk_state_store(sk, TCP_CLOSE); + mptcp_set_state(sk, TCP_CLOSE); break; } @@ -608,13 +608,13 @@ static bool mptcp_check_data_fin(struct sock *sk) switch (sk->sk_state) { case TCP_ESTABLISHED: - inet_sk_state_store(sk, TCP_CLOSE_WAIT); + mptcp_set_state(sk, TCP_CLOSE_WAIT); break; case TCP_FIN_WAIT1: - inet_sk_state_store(sk, TCP_CLOSING); + mptcp_set_state(sk, TCP_CLOSING); break; case TCP_FIN_WAIT2: - inet_sk_state_store(sk, TCP_CLOSE); + mptcp_set_state(sk, TCP_CLOSE); break; default: /* Other states not expected */ @@ -789,7 +789,7 @@ static bool __mptcp_subflow_error_report(struct sock *sk, struct sock *ssk) */ ssk_state = inet_sk_state_load(ssk); if (ssk_state == TCP_CLOSE && !sock_flag(sk, SOCK_DEAD)) - inet_sk_state_store(sk, ssk_state); + mptcp_set_state(sk, ssk_state); WRITE_ONCE(sk->sk_err, -err); /* This barrier is coupled with smp_rmb() in mptcp_poll() */ @@ -2477,7 +2477,7 @@ static void __mptcp_close_ssk(struct sock *sk, struct sock *ssk, inet_sk_state_load(msk->first) == TCP_CLOSE) { if (sk->sk_state != TCP_ESTABLISHED || msk->in_accept_queue || sock_flag(sk, SOCK_DEAD)) { - inet_sk_state_store(sk, TCP_CLOSE); + mptcp_set_state(sk, TCP_CLOSE); mptcp_close_wake_up(sk); } else { mptcp_start_tout_timer(sk); @@ -2572,7 +2572,7 @@ static void mptcp_check_fastclose(struct mptcp_sock *msk) WRITE_ONCE(sk->sk_err, ECONNRESET); } - inet_sk_state_store(sk, TCP_CLOSE); + mptcp_set_state(sk, TCP_CLOSE); WRITE_ONCE(sk->sk_shutdown, SHUTDOWN_MASK); smp_mb__before_atomic(); /* SHUTDOWN must be visible first */ set_bit(MPTCP_WORK_CLOSE_SUBFLOW, &msk->flags); @@ -2707,7 +2707,7 @@ static void mptcp_do_fastclose(struct sock *sk) struct mptcp_subflow_context *subflow, *tmp; struct mptcp_sock *msk = mptcp_sk(sk); - inet_sk_state_store(sk, TCP_CLOSE); + mptcp_set_state(sk, TCP_CLOSE); mptcp_for_each_subflow_safe(msk, subflow, tmp) __mptcp_close_ssk(sk, mptcp_subflow_tcp_sock(subflow), subflow, MPTCP_CF_FASTCLOSE); @@ -2925,7 +2925,7 @@ static int mptcp_close_state(struct sock *sk) int next = (int)new_state[sk->sk_state]; int ns = next & TCP_STATE_MASK; - inet_sk_state_store(sk, ns); + mptcp_set_state(sk, ns); return next & TCP_ACTION_FIN; } @@ -3036,7 +3036,7 @@ bool __mptcp_close(struct sock *sk, long timeout) if ((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) { mptcp_check_listen_stop(sk); - inet_sk_state_store(sk, TCP_CLOSE); + mptcp_set_state(sk, TCP_CLOSE); goto cleanup; } @@ -3079,7 +3079,7 @@ bool __mptcp_close(struct sock *sk, long timeout) * state, let's not keep resources busy for no reasons */ if (subflows_alive == 0) - inet_sk_state_store(sk, TCP_CLOSE); + mptcp_set_state(sk, TCP_CLOSE); sock_hold(sk); pr_debug("msk=%p state=%d", sk, sk->sk_state); @@ -3145,7 +3145,7 @@ static int mptcp_disconnect(struct sock *sk, int flags) return -EBUSY; mptcp_check_listen_stop(sk); - inet_sk_state_store(sk, TCP_CLOSE); + mptcp_set_state(sk, TCP_CLOSE); mptcp_stop_rtx_timer(sk); mptcp_stop_tout_timer(sk); @@ -3233,7 +3233,7 @@ struct sock *mptcp_sk_clone_init(const struct sock *sk, /* this can't race with mptcp_close(), as the msk is * not yet exposted to user-space */ - inet_sk_state_store(nsk, TCP_ESTABLISHED); + mptcp_set_state(nsk, TCP_ESTABLISHED); /* The msk maintain a ref to each subflow in the connections list */ WRITE_ONCE(msk->first, ssk); @@ -3692,7 +3692,7 @@ static int mptcp_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len) if (IS_ERR(ssk)) return PTR_ERR(ssk); - inet_sk_state_store(sk, TCP_SYN_SENT); + mptcp_set_state(sk, TCP_SYN_SENT); subflow = mptcp_subflow_ctx(ssk); #ifdef CONFIG_TCP_MD5SIG /* no MPTCP if MD5SIG is enabled on this socket or we may run out of @@ -3742,7 +3742,7 @@ static int mptcp_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len) if (unlikely(err)) { /* avoid leaving a dangling token in an unconnected socket */ mptcp_token_destroy(msk); - inet_sk_state_store(sk, TCP_CLOSE); + mptcp_set_state(sk, TCP_CLOSE); return err; } @@ -3832,13 +3832,13 @@ static int mptcp_listen(struct socket *sock, int backlog) goto unlock; } - inet_sk_state_store(sk, TCP_LISTEN); + mptcp_set_state(sk, TCP_LISTEN); sock_set_flag(sk, SOCK_RCU_FREE); lock_sock(ssk); err = __inet_listen_sk(ssk, backlog); release_sock(ssk); - inet_sk_state_store(sk, inet_sk_state_load(ssk)); + mptcp_set_state(sk, inet_sk_state_load(ssk)); if (!err) { sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); @@ -3898,7 +3898,7 @@ static int mptcp_stream_accept(struct socket *sock, struct socket *newsock, __mptcp_close_ssk(newsk, msk->first, mptcp_subflow_ctx(msk->first), 0); if (unlikely(list_is_singular(&msk->conn_list))) - inet_sk_state_store(newsk, TCP_CLOSE); + mptcp_set_state(newsk, TCP_CLOSE); } } release_sock(newsk); diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 6d7684c35e93..1ef28642afc4 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -425,7 +425,7 @@ void __mptcp_sync_state(struct sock *sk, int state) __mptcp_propagate_sndbuf(sk, msk->first); if (sk->sk_state == TCP_SYN_SENT) { - inet_sk_state_store(sk, state); + mptcp_set_state(sk, state); sk->sk_state_change(sk); } } -- 2.43.0
