From 0abdde82b163600dcafb80da6e155dbf60c331bc Mon Sep 17 00:00:00 2001 From: Paolo Abeni Date: Thu, 15 Apr 2021 16:44:51 -0700 Subject: mptcp: move sockopt function into a new file The MPTCP sockopt implementation is going to be much more big and complex soon. Let's move it to a different source file. No functional change intended. Signed-off-by: Paolo Abeni Signed-off-by: Mat Martineau Signed-off-by: David S. Miller --- net/mptcp/Makefile | 2 +- net/mptcp/protocol.c | 120 --------------------------------------------- net/mptcp/protocol.h | 5 ++ net/mptcp/sockopt.c | 136 +++++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 142 insertions(+), 121 deletions(-) create mode 100644 net/mptcp/sockopt.c diff --git a/net/mptcp/Makefile b/net/mptcp/Makefile index a611968be4d7..d2642c012a6a 100644 --- a/net/mptcp/Makefile +++ b/net/mptcp/Makefile @@ -2,7 +2,7 @@ obj-$(CONFIG_MPTCP) += mptcp.o mptcp-y := protocol.o subflow.o options.o token.o crypto.o ctrl.o pm.o diag.o \ - mib.o pm_netlink.o + mib.o pm_netlink.o sockopt.o obj-$(CONFIG_SYN_COOKIES) += syncookies.o obj-$(CONFIG_INET_MPTCP_DIAG) += mptcp_diag.o diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 2fcdc611c122..e0b381ae99af 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -90,16 +90,6 @@ static bool mptcp_is_tcpsk(struct sock *sk) return false; } -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->first; -} - static int __mptcp_socket_create(struct mptcp_sock *msk) { struct mptcp_subflow_context *subflow; @@ -2811,116 +2801,6 @@ static void mptcp_destroy(struct sock *sk) sk_sockets_allocated_dec(sk); } -static int mptcp_setsockopt_sol_socket(struct mptcp_sock *msk, int optname, - sockptr_t optval, unsigned int optlen) -{ - struct sock *sk = (struct sock *)msk; - struct socket *ssock; - int ret; - - switch (optname) { - case SO_REUSEPORT: - case SO_REUSEADDR: - lock_sock(sk); - ssock = __mptcp_nmpc_socket(msk); - if (!ssock) { - release_sock(sk); - return -EINVAL; - } - - ret = sock_setsockopt(ssock, SOL_SOCKET, optname, optval, optlen); - if (ret == 0) { - if (optname == SO_REUSEPORT) - sk->sk_reuseport = ssock->sk->sk_reuseport; - else if (optname == SO_REUSEADDR) - sk->sk_reuse = ssock->sk->sk_reuse; - } - release_sock(sk); - return ret; - } - - return sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname, optval, optlen); -} - -static int mptcp_setsockopt_v6(struct mptcp_sock *msk, int optname, - sockptr_t optval, unsigned int optlen) -{ - struct sock *sk = (struct sock *)msk; - int ret = -EOPNOTSUPP; - struct socket *ssock; - - switch (optname) { - case IPV6_V6ONLY: - lock_sock(sk); - ssock = __mptcp_nmpc_socket(msk); - if (!ssock) { - release_sock(sk); - return -EINVAL; - } - - ret = tcp_setsockopt(ssock->sk, SOL_IPV6, optname, optval, optlen); - if (ret == 0) - sk->sk_ipv6only = ssock->sk->sk_ipv6only; - - release_sock(sk); - break; - } - - return ret; -} - -static int mptcp_setsockopt(struct sock *sk, int level, int optname, - sockptr_t optval, unsigned int optlen) -{ - struct mptcp_sock *msk = mptcp_sk(sk); - struct sock *ssk; - - pr_debug("msk=%p", msk); - - if (level == SOL_SOCKET) - return mptcp_setsockopt_sol_socket(msk, optname, optval, optlen); - - /* @@ the meaning of setsockopt() when the socket is connected and - * there are multiple subflows is not yet defined. It is up to the - * MPTCP-level socket to configure the subflows until the subflow - * is in TCP fallback, when TCP socket options are passed through - * to the one remaining subflow. - */ - lock_sock(sk); - ssk = __mptcp_tcp_fallback(msk); - release_sock(sk); - if (ssk) - return tcp_setsockopt(ssk, level, optname, optval, optlen); - - if (level == SOL_IPV6) - return mptcp_setsockopt_v6(msk, optname, optval, optlen); - - return -EOPNOTSUPP; -} - -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 sock *ssk; - - pr_debug("msk=%p", msk); - - /* @@ the meaning of setsockopt() when the socket is connected and - * there are multiple subflows is not yet defined. It is up to the - * MPTCP-level socket to configure the subflows until the subflow - * is in TCP fallback, when socket options are passed through - * to the one remaining subflow. - */ - lock_sock(sk); - ssk = __mptcp_tcp_fallback(msk); - release_sock(sk); - if (ssk) - return tcp_getsockopt(ssk, level, optname, optval, option); - - return -EOPNOTSUPP; -} - void __mptcp_data_acked(struct sock *sk) { if (!sock_owned_by_user(sk)) diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index d8de1e961ab0..14f0114be17a 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -571,6 +571,11 @@ void mptcp_rcv_space_init(struct mptcp_sock *msk, const struct sock *ssk); void mptcp_data_ready(struct sock *sk, struct sock *ssk); bool mptcp_finish_join(struct sock *sk); bool mptcp_schedule_work(struct sock *sk); +int mptcp_setsockopt(struct sock *sk, int level, int optname, + sockptr_t optval, unsigned int optlen); +int mptcp_getsockopt(struct sock *sk, int level, int optname, + char __user *optval, int __user *option); + void __mptcp_check_push(struct sock *sk, struct sock *ssk); void __mptcp_data_acked(struct sock *sk); void __mptcp_error_report(struct sock *sk); diff --git a/net/mptcp/sockopt.c b/net/mptcp/sockopt.c new file mode 100644 index 000000000000..479f75653969 --- /dev/null +++ b/net/mptcp/sockopt.c @@ -0,0 +1,136 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Multipath TCP + * + * Copyright (c) 2021, Red Hat. + */ + +#define pr_fmt(fmt) "MPTCP: " fmt + +#include +#include +#include +#include +#include +#include +#include "protocol.h" + +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->first; +} + +static int mptcp_setsockopt_sol_socket(struct mptcp_sock *msk, int optname, + sockptr_t optval, unsigned int optlen) +{ + struct sock *sk = (struct sock *)msk; + struct socket *ssock; + int ret; + + switch (optname) { + case SO_REUSEPORT: + case SO_REUSEADDR: + lock_sock(sk); + ssock = __mptcp_nmpc_socket(msk); + if (!ssock) { + release_sock(sk); + return -EINVAL; + } + + ret = sock_setsockopt(ssock, SOL_SOCKET, optname, optval, optlen); + if (ret == 0) { + if (optname == SO_REUSEPORT) + sk->sk_reuseport = ssock->sk->sk_reuseport; + else if (optname == SO_REUSEADDR) + sk->sk_reuse = ssock->sk->sk_reuse; + } + release_sock(sk); + return ret; + } + + return sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname, optval, optlen); +} + +static int mptcp_setsockopt_v6(struct mptcp_sock *msk, int optname, + sockptr_t optval, unsigned int optlen) +{ + struct sock *sk = (struct sock *)msk; + int ret = -EOPNOTSUPP; + struct socket *ssock; + + switch (optname) { + case IPV6_V6ONLY: + lock_sock(sk); + ssock = __mptcp_nmpc_socket(msk); + if (!ssock) { + release_sock(sk); + return -EINVAL; + } + + ret = tcp_setsockopt(ssock->sk, SOL_IPV6, optname, optval, optlen); + if (ret == 0) + sk->sk_ipv6only = ssock->sk->sk_ipv6only; + + release_sock(sk); + break; + } + + return ret; +} + +int mptcp_setsockopt(struct sock *sk, int level, int optname, + sockptr_t optval, unsigned int optlen) +{ + struct mptcp_sock *msk = mptcp_sk(sk); + struct sock *ssk; + + pr_debug("msk=%p", msk); + + if (level == SOL_SOCKET) + return mptcp_setsockopt_sol_socket(msk, optname, optval, optlen); + + /* @@ the meaning of setsockopt() when the socket is connected and + * there are multiple subflows is not yet defined. It is up to the + * MPTCP-level socket to configure the subflows until the subflow + * is in TCP fallback, when TCP socket options are passed through + * to the one remaining subflow. + */ + lock_sock(sk); + ssk = __mptcp_tcp_fallback(msk); + release_sock(sk); + if (ssk) + return tcp_setsockopt(ssk, level, optname, optval, optlen); + + if (level == SOL_IPV6) + return mptcp_setsockopt_v6(msk, optname, optval, optlen); + + return -EOPNOTSUPP; +} + +int mptcp_getsockopt(struct sock *sk, int level, int optname, + char __user *optval, int __user *option) +{ + struct mptcp_sock *msk = mptcp_sk(sk); + struct sock *ssk; + + pr_debug("msk=%p", msk); + + /* @@ the meaning of setsockopt() when the socket is connected and + * there are multiple subflows is not yet defined. It is up to the + * MPTCP-level socket to configure the subflows until the subflow + * is in TCP fallback, when socket options are passed through + * to the one remaining subflow. + */ + lock_sock(sk); + ssk = __mptcp_tcp_fallback(msk); + release_sock(sk); + if (ssk) + return tcp_getsockopt(ssk, level, optname, optval, option); + + return -EOPNOTSUPP; +} + -- cgit v1.2.3