1343 lines
32 KiB
C
1343 lines
32 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Multipath TCP
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*
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* Copyright (c) 2021, Red Hat.
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*/
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#define pr_fmt(fmt) "MPTCP: " fmt
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <net/sock.h>
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#include <net/protocol.h>
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#include <net/tcp.h>
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#include <net/mptcp.h>
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#include "protocol.h"
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#define MIN_INFO_OPTLEN_SIZE 16
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static struct sock *__mptcp_tcp_fallback(struct mptcp_sock *msk)
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{
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msk_owned_by_me(msk);
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if (likely(!__mptcp_check_fallback(msk)))
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return NULL;
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return msk->first;
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}
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static u32 sockopt_seq_reset(const struct sock *sk)
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{
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sock_owned_by_me(sk);
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/* Highbits contain state. Allows to distinguish sockopt_seq
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* of listener and established:
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* s0 = new_listener()
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* sockopt(s0) - seq is 1
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* s1 = accept(s0) - s1 inherits seq 1 if listener sk (s0)
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* sockopt(s0) - seq increments to 2 on s0
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* sockopt(s1) // seq increments to 2 on s1 (different option)
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* new ssk completes join, inherits options from s0 // seq 2
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* Needs sync from mptcp join logic, but ssk->seq == msk->seq
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*
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* Set High order bits to sk_state so ssk->seq == msk->seq test
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* will fail.
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*/
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return (u32)sk->sk_state << 24u;
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}
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static void sockopt_seq_inc(struct mptcp_sock *msk)
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{
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u32 seq = (msk->setsockopt_seq + 1) & 0x00ffffff;
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msk->setsockopt_seq = sockopt_seq_reset((struct sock *)msk) + seq;
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}
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static int mptcp_get_int_option(struct mptcp_sock *msk, sockptr_t optval,
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unsigned int optlen, int *val)
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{
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if (optlen < sizeof(int))
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return -EINVAL;
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if (copy_from_sockptr(val, optval, sizeof(*val)))
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return -EFAULT;
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return 0;
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}
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static void mptcp_sol_socket_sync_intval(struct mptcp_sock *msk, int optname, int val)
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{
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struct mptcp_subflow_context *subflow;
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struct sock *sk = (struct sock *)msk;
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lock_sock(sk);
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sockopt_seq_inc(msk);
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mptcp_for_each_subflow(msk, subflow) {
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struct sock *ssk = mptcp_subflow_tcp_sock(subflow);
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bool slow = lock_sock_fast(ssk);
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switch (optname) {
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case SO_DEBUG:
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sock_valbool_flag(ssk, SOCK_DBG, !!val);
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break;
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case SO_KEEPALIVE:
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if (ssk->sk_prot->keepalive)
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ssk->sk_prot->keepalive(ssk, !!val);
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sock_valbool_flag(ssk, SOCK_KEEPOPEN, !!val);
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break;
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case SO_PRIORITY:
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ssk->sk_priority = val;
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break;
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case SO_SNDBUF:
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case SO_SNDBUFFORCE:
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ssk->sk_userlocks |= SOCK_SNDBUF_LOCK;
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WRITE_ONCE(ssk->sk_sndbuf, sk->sk_sndbuf);
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break;
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case SO_RCVBUF:
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case SO_RCVBUFFORCE:
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ssk->sk_userlocks |= SOCK_RCVBUF_LOCK;
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WRITE_ONCE(ssk->sk_rcvbuf, sk->sk_rcvbuf);
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break;
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case SO_MARK:
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if (READ_ONCE(ssk->sk_mark) != sk->sk_mark) {
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ssk->sk_mark = sk->sk_mark;
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sk_dst_reset(ssk);
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}
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break;
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case SO_INCOMING_CPU:
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WRITE_ONCE(ssk->sk_incoming_cpu, val);
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break;
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}
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subflow->setsockopt_seq = msk->setsockopt_seq;
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unlock_sock_fast(ssk, slow);
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}
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release_sock(sk);
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}
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static int mptcp_sol_socket_intval(struct mptcp_sock *msk, int optname, int val)
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{
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sockptr_t optval = KERNEL_SOCKPTR(&val);
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struct sock *sk = (struct sock *)msk;
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int ret;
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ret = sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname,
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optval, sizeof(val));
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if (ret)
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return ret;
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mptcp_sol_socket_sync_intval(msk, optname, val);
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return 0;
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}
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static void mptcp_so_incoming_cpu(struct mptcp_sock *msk, int val)
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{
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struct sock *sk = (struct sock *)msk;
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WRITE_ONCE(sk->sk_incoming_cpu, val);
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mptcp_sol_socket_sync_intval(msk, SO_INCOMING_CPU, val);
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}
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static int mptcp_setsockopt_sol_socket_tstamp(struct mptcp_sock *msk, int optname, int val)
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{
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sockptr_t optval = KERNEL_SOCKPTR(&val);
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struct mptcp_subflow_context *subflow;
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struct sock *sk = (struct sock *)msk;
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int ret;
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ret = sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname,
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optval, sizeof(val));
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if (ret)
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return ret;
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lock_sock(sk);
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mptcp_for_each_subflow(msk, subflow) {
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struct sock *ssk = mptcp_subflow_tcp_sock(subflow);
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bool slow = lock_sock_fast(ssk);
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sock_set_timestamp(sk, optname, !!val);
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unlock_sock_fast(ssk, slow);
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}
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release_sock(sk);
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return 0;
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}
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static int mptcp_setsockopt_sol_socket_int(struct mptcp_sock *msk, int optname,
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sockptr_t optval,
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unsigned int optlen)
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{
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int val, ret;
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ret = mptcp_get_int_option(msk, optval, optlen, &val);
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if (ret)
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return ret;
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switch (optname) {
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case SO_KEEPALIVE:
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mptcp_sol_socket_sync_intval(msk, optname, val);
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return 0;
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case SO_DEBUG:
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case SO_MARK:
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case SO_PRIORITY:
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case SO_SNDBUF:
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case SO_SNDBUFFORCE:
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case SO_RCVBUF:
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case SO_RCVBUFFORCE:
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return mptcp_sol_socket_intval(msk, optname, val);
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case SO_INCOMING_CPU:
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mptcp_so_incoming_cpu(msk, val);
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return 0;
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case SO_TIMESTAMP_OLD:
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case SO_TIMESTAMP_NEW:
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case SO_TIMESTAMPNS_OLD:
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case SO_TIMESTAMPNS_NEW:
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return mptcp_setsockopt_sol_socket_tstamp(msk, optname, val);
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}
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return -ENOPROTOOPT;
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}
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static int mptcp_setsockopt_sol_socket_timestamping(struct mptcp_sock *msk,
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int optname,
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sockptr_t optval,
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unsigned int optlen)
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{
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struct mptcp_subflow_context *subflow;
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struct sock *sk = (struct sock *)msk;
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struct so_timestamping timestamping;
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int ret;
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if (optlen == sizeof(timestamping)) {
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if (copy_from_sockptr(×tamping, optval,
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sizeof(timestamping)))
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return -EFAULT;
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} else if (optlen == sizeof(int)) {
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memset(×tamping, 0, sizeof(timestamping));
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if (copy_from_sockptr(×tamping.flags, optval, sizeof(int)))
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return -EFAULT;
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} else {
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return -EINVAL;
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}
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ret = sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname,
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KERNEL_SOCKPTR(×tamping),
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sizeof(timestamping));
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if (ret)
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return ret;
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lock_sock(sk);
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mptcp_for_each_subflow(msk, subflow) {
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struct sock *ssk = mptcp_subflow_tcp_sock(subflow);
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bool slow = lock_sock_fast(ssk);
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sock_set_timestamping(sk, optname, timestamping);
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unlock_sock_fast(ssk, slow);
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}
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release_sock(sk);
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return 0;
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}
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static int mptcp_setsockopt_sol_socket_linger(struct mptcp_sock *msk, sockptr_t optval,
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unsigned int optlen)
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{
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struct mptcp_subflow_context *subflow;
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struct sock *sk = (struct sock *)msk;
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struct linger ling;
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sockptr_t kopt;
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int ret;
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if (optlen < sizeof(ling))
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return -EINVAL;
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if (copy_from_sockptr(&ling, optval, sizeof(ling)))
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return -EFAULT;
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kopt = KERNEL_SOCKPTR(&ling);
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ret = sock_setsockopt(sk->sk_socket, SOL_SOCKET, SO_LINGER, kopt, sizeof(ling));
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if (ret)
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return ret;
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lock_sock(sk);
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sockopt_seq_inc(msk);
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mptcp_for_each_subflow(msk, subflow) {
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struct sock *ssk = mptcp_subflow_tcp_sock(subflow);
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bool slow = lock_sock_fast(ssk);
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if (!ling.l_onoff) {
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sock_reset_flag(ssk, SOCK_LINGER);
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} else {
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ssk->sk_lingertime = sk->sk_lingertime;
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sock_set_flag(ssk, SOCK_LINGER);
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}
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subflow->setsockopt_seq = msk->setsockopt_seq;
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unlock_sock_fast(ssk, slow);
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}
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release_sock(sk);
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return 0;
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}
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static int mptcp_setsockopt_sol_socket(struct mptcp_sock *msk, int optname,
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sockptr_t optval, unsigned int optlen)
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{
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struct sock *sk = (struct sock *)msk;
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struct socket *ssock;
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int ret;
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switch (optname) {
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case SO_REUSEPORT:
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case SO_REUSEADDR:
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case SO_BINDTODEVICE:
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case SO_BINDTOIFINDEX:
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lock_sock(sk);
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ssock = __mptcp_nmpc_socket(msk);
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if (IS_ERR(ssock)) {
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release_sock(sk);
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return PTR_ERR(ssock);
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}
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ret = sock_setsockopt(ssock, SOL_SOCKET, optname, optval, optlen);
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if (ret == 0) {
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if (optname == SO_REUSEPORT)
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sk->sk_reuseport = ssock->sk->sk_reuseport;
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else if (optname == SO_REUSEADDR)
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sk->sk_reuse = ssock->sk->sk_reuse;
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else if (optname == SO_BINDTODEVICE)
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sk->sk_bound_dev_if = ssock->sk->sk_bound_dev_if;
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else if (optname == SO_BINDTOIFINDEX)
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sk->sk_bound_dev_if = ssock->sk->sk_bound_dev_if;
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}
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release_sock(sk);
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return ret;
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case SO_KEEPALIVE:
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case SO_PRIORITY:
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case SO_SNDBUF:
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case SO_SNDBUFFORCE:
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case SO_RCVBUF:
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case SO_RCVBUFFORCE:
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case SO_MARK:
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case SO_INCOMING_CPU:
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case SO_DEBUG:
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case SO_TIMESTAMP_OLD:
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case SO_TIMESTAMP_NEW:
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case SO_TIMESTAMPNS_OLD:
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case SO_TIMESTAMPNS_NEW:
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return mptcp_setsockopt_sol_socket_int(msk, optname, optval,
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optlen);
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case SO_TIMESTAMPING_OLD:
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case SO_TIMESTAMPING_NEW:
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return mptcp_setsockopt_sol_socket_timestamping(msk, optname,
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optval, optlen);
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case SO_LINGER:
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return mptcp_setsockopt_sol_socket_linger(msk, optval, optlen);
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case SO_RCVLOWAT:
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case SO_RCVTIMEO_OLD:
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case SO_RCVTIMEO_NEW:
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case SO_SNDTIMEO_OLD:
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case SO_SNDTIMEO_NEW:
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case SO_BUSY_POLL:
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case SO_PREFER_BUSY_POLL:
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case SO_BUSY_POLL_BUDGET:
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/* No need to copy: only relevant for msk */
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return sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname, optval, optlen);
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case SO_NO_CHECK:
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case SO_DONTROUTE:
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case SO_BROADCAST:
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case SO_BSDCOMPAT:
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case SO_PASSCRED:
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case SO_PASSSEC:
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case SO_RXQ_OVFL:
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case SO_WIFI_STATUS:
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case SO_NOFCS:
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case SO_SELECT_ERR_QUEUE:
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return 0;
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}
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/* SO_OOBINLINE is not supported, let's avoid the related mess
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* SO_ATTACH_FILTER, SO_ATTACH_BPF, SO_ATTACH_REUSEPORT_CBPF,
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* SO_DETACH_REUSEPORT_BPF, SO_DETACH_FILTER, SO_LOCK_FILTER,
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* we must be careful with subflows
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*
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* SO_ATTACH_REUSEPORT_EBPF is not supported, at it checks
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* explicitly the sk_protocol field
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*
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* SO_PEEK_OFF is unsupported, as it is for plain TCP
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* SO_MAX_PACING_RATE is unsupported, we must be careful with subflows
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* SO_CNX_ADVICE is currently unsupported, could possibly be relevant,
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* but likely needs careful design
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*
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* SO_ZEROCOPY is currently unsupported, TODO in sndmsg
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* SO_TXTIME is currently unsupported
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*/
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return -EOPNOTSUPP;
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}
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static int mptcp_setsockopt_v6(struct mptcp_sock *msk, int optname,
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sockptr_t optval, unsigned int optlen)
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{
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struct sock *sk = (struct sock *)msk;
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int ret = -EOPNOTSUPP;
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struct socket *ssock;
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switch (optname) {
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case IPV6_V6ONLY:
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case IPV6_TRANSPARENT:
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case IPV6_FREEBIND:
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lock_sock(sk);
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ssock = __mptcp_nmpc_socket(msk);
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if (IS_ERR(ssock)) {
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release_sock(sk);
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return PTR_ERR(ssock);
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}
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ret = tcp_setsockopt(ssock->sk, SOL_IPV6, optname, optval, optlen);
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if (ret != 0) {
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release_sock(sk);
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return ret;
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}
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sockopt_seq_inc(msk);
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switch (optname) {
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case IPV6_V6ONLY:
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sk->sk_ipv6only = ssock->sk->sk_ipv6only;
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break;
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case IPV6_TRANSPARENT:
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inet_sk(sk)->transparent = inet_sk(ssock->sk)->transparent;
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break;
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case IPV6_FREEBIND:
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inet_sk(sk)->freebind = inet_sk(ssock->sk)->freebind;
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break;
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}
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release_sock(sk);
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break;
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}
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return ret;
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}
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static bool mptcp_supported_sockopt(int level, int optname)
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{
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if (level == SOL_IP) {
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switch (optname) {
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/* should work fine */
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case IP_FREEBIND:
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case IP_TRANSPARENT:
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/* the following are control cmsg related */
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case IP_PKTINFO:
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case IP_RECVTTL:
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case IP_RECVTOS:
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case IP_RECVOPTS:
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case IP_RETOPTS:
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case IP_PASSSEC:
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case IP_RECVORIGDSTADDR:
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case IP_CHECKSUM:
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case IP_RECVFRAGSIZE:
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/* common stuff that need some love */
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case IP_TOS:
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case IP_TTL:
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case IP_BIND_ADDRESS_NO_PORT:
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case IP_MTU_DISCOVER:
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case IP_RECVERR:
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/* possibly less common may deserve some love */
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case IP_MINTTL:
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/* the following is apparently a no-op for plain TCP */
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case IP_RECVERR_RFC4884:
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return true;
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}
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/* IP_OPTIONS is not supported, needs subflow care */
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/* IP_HDRINCL, IP_NODEFRAG are not supported, RAW specific */
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/* IP_MULTICAST_TTL, IP_MULTICAST_LOOP, IP_UNICAST_IF,
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* IP_ADD_MEMBERSHIP, IP_ADD_SOURCE_MEMBERSHIP, IP_DROP_MEMBERSHIP,
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* IP_DROP_SOURCE_MEMBERSHIP, IP_BLOCK_SOURCE, IP_UNBLOCK_SOURCE,
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* MCAST_JOIN_GROUP, MCAST_LEAVE_GROUP MCAST_JOIN_SOURCE_GROUP,
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* MCAST_LEAVE_SOURCE_GROUP, MCAST_BLOCK_SOURCE, MCAST_UNBLOCK_SOURCE,
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* MCAST_MSFILTER, IP_MULTICAST_ALL are not supported, better not deal
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* with mcast stuff
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*/
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/* IP_IPSEC_POLICY, IP_XFRM_POLICY are nut supported, unrelated here */
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return false;
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}
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if (level == SOL_IPV6) {
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switch (optname) {
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case IPV6_V6ONLY:
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/* the following are control cmsg related */
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case IPV6_RECVPKTINFO:
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case IPV6_2292PKTINFO:
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case IPV6_RECVHOPLIMIT:
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case IPV6_2292HOPLIMIT:
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case IPV6_RECVRTHDR:
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case IPV6_2292RTHDR:
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case IPV6_RECVHOPOPTS:
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case IPV6_2292HOPOPTS:
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case IPV6_RECVDSTOPTS:
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case IPV6_2292DSTOPTS:
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case IPV6_RECVTCLASS:
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case IPV6_FLOWINFO:
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case IPV6_RECVPATHMTU:
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case IPV6_RECVORIGDSTADDR:
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case IPV6_RECVFRAGSIZE:
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/* the following ones need some love but are quite common */
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case IPV6_TCLASS:
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case IPV6_TRANSPARENT:
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case IPV6_FREEBIND:
|
|
case IPV6_PKTINFO:
|
|
case IPV6_2292PKTOPTIONS:
|
|
case IPV6_UNICAST_HOPS:
|
|
case IPV6_MTU_DISCOVER:
|
|
case IPV6_MTU:
|
|
case IPV6_RECVERR:
|
|
case IPV6_FLOWINFO_SEND:
|
|
case IPV6_FLOWLABEL_MGR:
|
|
case IPV6_MINHOPCOUNT:
|
|
case IPV6_DONTFRAG:
|
|
case IPV6_AUTOFLOWLABEL:
|
|
|
|
/* the following one is a no-op for plain TCP */
|
|
case IPV6_RECVERR_RFC4884:
|
|
return true;
|
|
}
|
|
|
|
/* IPV6_HOPOPTS, IPV6_RTHDRDSTOPTS, IPV6_RTHDR, IPV6_DSTOPTS are
|
|
* not supported
|
|
*/
|
|
/* IPV6_MULTICAST_HOPS, IPV6_MULTICAST_LOOP, IPV6_UNICAST_IF,
|
|
* IPV6_MULTICAST_IF, IPV6_ADDRFORM,
|
|
* IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
|
|
* IPV6_LEAVE_ANYCAST, IPV6_MULTICAST_ALL, MCAST_JOIN_GROUP, MCAST_LEAVE_GROUP,
|
|
* MCAST_JOIN_SOURCE_GROUP, MCAST_LEAVE_SOURCE_GROUP,
|
|
* MCAST_BLOCK_SOURCE, MCAST_UNBLOCK_SOURCE, MCAST_MSFILTER
|
|
* are not supported better not deal with mcast
|
|
*/
|
|
/* IPV6_ROUTER_ALERT, IPV6_ROUTER_ALERT_ISOLATE are not supported, since are evil */
|
|
|
|
/* IPV6_IPSEC_POLICY, IPV6_XFRM_POLICY are not supported */
|
|
/* IPV6_ADDR_PREFERENCES is not supported, we must be careful with subflows */
|
|
return false;
|
|
}
|
|
if (level == SOL_TCP) {
|
|
switch (optname) {
|
|
/* the following are no-op or should work just fine */
|
|
case TCP_THIN_DUPACK:
|
|
case TCP_DEFER_ACCEPT:
|
|
|
|
/* the following need some love */
|
|
case TCP_MAXSEG:
|
|
case TCP_NODELAY:
|
|
case TCP_THIN_LINEAR_TIMEOUTS:
|
|
case TCP_CONGESTION:
|
|
case TCP_CORK:
|
|
case TCP_KEEPIDLE:
|
|
case TCP_KEEPINTVL:
|
|
case TCP_KEEPCNT:
|
|
case TCP_SYNCNT:
|
|
case TCP_SAVE_SYN:
|
|
case TCP_LINGER2:
|
|
case TCP_WINDOW_CLAMP:
|
|
case TCP_QUICKACK:
|
|
case TCP_USER_TIMEOUT:
|
|
case TCP_TIMESTAMP:
|
|
case TCP_NOTSENT_LOWAT:
|
|
case TCP_TX_DELAY:
|
|
case TCP_INQ:
|
|
case TCP_FASTOPEN:
|
|
case TCP_FASTOPEN_CONNECT:
|
|
case TCP_FASTOPEN_KEY:
|
|
case TCP_FASTOPEN_NO_COOKIE:
|
|
return true;
|
|
}
|
|
|
|
/* TCP_MD5SIG, TCP_MD5SIG_EXT are not supported, MD5 is not compatible with MPTCP */
|
|
|
|
/* TCP_REPAIR, TCP_REPAIR_QUEUE, TCP_QUEUE_SEQ, TCP_REPAIR_OPTIONS,
|
|
* TCP_REPAIR_WINDOW are not supported, better avoid this mess
|
|
*/
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static int mptcp_setsockopt_sol_tcp_congestion(struct mptcp_sock *msk, sockptr_t optval,
|
|
unsigned int optlen)
|
|
{
|
|
struct mptcp_subflow_context *subflow;
|
|
struct sock *sk = (struct sock *)msk;
|
|
char name[TCP_CA_NAME_MAX];
|
|
bool cap_net_admin;
|
|
int ret;
|
|
|
|
if (optlen < 1)
|
|
return -EINVAL;
|
|
|
|
ret = strncpy_from_sockptr(name, optval,
|
|
min_t(long, TCP_CA_NAME_MAX - 1, optlen));
|
|
if (ret < 0)
|
|
return -EFAULT;
|
|
|
|
name[ret] = 0;
|
|
|
|
cap_net_admin = ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN);
|
|
|
|
ret = 0;
|
|
lock_sock(sk);
|
|
sockopt_seq_inc(msk);
|
|
mptcp_for_each_subflow(msk, subflow) {
|
|
struct sock *ssk = mptcp_subflow_tcp_sock(subflow);
|
|
int err;
|
|
|
|
lock_sock(ssk);
|
|
err = tcp_set_congestion_control(ssk, name, true, cap_net_admin);
|
|
if (err < 0 && ret == 0)
|
|
ret = err;
|
|
subflow->setsockopt_seq = msk->setsockopt_seq;
|
|
release_sock(ssk);
|
|
}
|
|
|
|
if (ret == 0)
|
|
strcpy(msk->ca_name, name);
|
|
|
|
release_sock(sk);
|
|
return ret;
|
|
}
|
|
|
|
static int mptcp_setsockopt_sol_tcp_cork(struct mptcp_sock *msk, sockptr_t optval,
|
|
unsigned int optlen)
|
|
{
|
|
struct mptcp_subflow_context *subflow;
|
|
struct sock *sk = (struct sock *)msk;
|
|
int val;
|
|
|
|
if (optlen < sizeof(int))
|
|
return -EINVAL;
|
|
|
|
if (copy_from_sockptr(&val, optval, sizeof(val)))
|
|
return -EFAULT;
|
|
|
|
lock_sock(sk);
|
|
sockopt_seq_inc(msk);
|
|
msk->cork = !!val;
|
|
mptcp_for_each_subflow(msk, subflow) {
|
|
struct sock *ssk = mptcp_subflow_tcp_sock(subflow);
|
|
|
|
lock_sock(ssk);
|
|
__tcp_sock_set_cork(ssk, !!val);
|
|
release_sock(ssk);
|
|
}
|
|
if (!val)
|
|
mptcp_check_and_set_pending(sk);
|
|
release_sock(sk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mptcp_setsockopt_sol_tcp_nodelay(struct mptcp_sock *msk, sockptr_t optval,
|
|
unsigned int optlen)
|
|
{
|
|
struct mptcp_subflow_context *subflow;
|
|
struct sock *sk = (struct sock *)msk;
|
|
int val;
|
|
|
|
if (optlen < sizeof(int))
|
|
return -EINVAL;
|
|
|
|
if (copy_from_sockptr(&val, optval, sizeof(val)))
|
|
return -EFAULT;
|
|
|
|
lock_sock(sk);
|
|
sockopt_seq_inc(msk);
|
|
msk->nodelay = !!val;
|
|
mptcp_for_each_subflow(msk, subflow) {
|
|
struct sock *ssk = mptcp_subflow_tcp_sock(subflow);
|
|
|
|
lock_sock(ssk);
|
|
__tcp_sock_set_nodelay(ssk, !!val);
|
|
release_sock(ssk);
|
|
}
|
|
if (val)
|
|
mptcp_check_and_set_pending(sk);
|
|
release_sock(sk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mptcp_setsockopt_sol_ip_set_transparent(struct mptcp_sock *msk, int optname,
|
|
sockptr_t optval, unsigned int optlen)
|
|
{
|
|
struct sock *sk = (struct sock *)msk;
|
|
struct inet_sock *issk;
|
|
struct socket *ssock;
|
|
int err;
|
|
|
|
err = ip_setsockopt(sk, SOL_IP, optname, optval, optlen);
|
|
if (err != 0)
|
|
return err;
|
|
|
|
lock_sock(sk);
|
|
|
|
ssock = __mptcp_nmpc_socket(msk);
|
|
if (IS_ERR(ssock)) {
|
|
release_sock(sk);
|
|
return PTR_ERR(ssock);
|
|
}
|
|
|
|
issk = inet_sk(ssock->sk);
|
|
|
|
switch (optname) {
|
|
case IP_FREEBIND:
|
|
issk->freebind = inet_sk(sk)->freebind;
|
|
break;
|
|
case IP_TRANSPARENT:
|
|
issk->transparent = inet_sk(sk)->transparent;
|
|
break;
|
|
default:
|
|
release_sock(sk);
|
|
WARN_ON_ONCE(1);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
sockopt_seq_inc(msk);
|
|
release_sock(sk);
|
|
return 0;
|
|
}
|
|
|
|
static int mptcp_setsockopt_v4_set_tos(struct mptcp_sock *msk, int optname,
|
|
sockptr_t optval, unsigned int optlen)
|
|
{
|
|
struct mptcp_subflow_context *subflow;
|
|
struct sock *sk = (struct sock *)msk;
|
|
int err, val;
|
|
|
|
err = ip_setsockopt(sk, SOL_IP, optname, optval, optlen);
|
|
|
|
if (err != 0)
|
|
return err;
|
|
|
|
lock_sock(sk);
|
|
sockopt_seq_inc(msk);
|
|
val = inet_sk(sk)->tos;
|
|
mptcp_for_each_subflow(msk, subflow) {
|
|
struct sock *ssk = mptcp_subflow_tcp_sock(subflow);
|
|
|
|
__ip_sock_set_tos(ssk, val);
|
|
}
|
|
release_sock(sk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mptcp_setsockopt_v4(struct mptcp_sock *msk, int optname,
|
|
sockptr_t optval, unsigned int optlen)
|
|
{
|
|
switch (optname) {
|
|
case IP_FREEBIND:
|
|
case IP_TRANSPARENT:
|
|
return mptcp_setsockopt_sol_ip_set_transparent(msk, optname, optval, optlen);
|
|
case IP_TOS:
|
|
return mptcp_setsockopt_v4_set_tos(msk, optname, optval, optlen);
|
|
}
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int mptcp_setsockopt_first_sf_only(struct mptcp_sock *msk, int level, int optname,
|
|
sockptr_t optval, unsigned int optlen)
|
|
{
|
|
struct sock *sk = (struct sock *)msk;
|
|
struct socket *sock;
|
|
int ret;
|
|
|
|
/* Limit to first subflow, before the connection establishment */
|
|
lock_sock(sk);
|
|
sock = __mptcp_nmpc_socket(msk);
|
|
if (IS_ERR(sock)) {
|
|
ret = PTR_ERR(sock);
|
|
goto unlock;
|
|
}
|
|
|
|
ret = tcp_setsockopt(sock->sk, level, optname, optval, optlen);
|
|
|
|
unlock:
|
|
release_sock(sk);
|
|
return ret;
|
|
}
|
|
|
|
static int mptcp_setsockopt_sol_tcp(struct mptcp_sock *msk, int optname,
|
|
sockptr_t optval, unsigned int optlen)
|
|
{
|
|
struct sock *sk = (void *)msk;
|
|
int ret, val;
|
|
|
|
switch (optname) {
|
|
case TCP_INQ:
|
|
ret = mptcp_get_int_option(msk, optval, optlen, &val);
|
|
if (ret)
|
|
return ret;
|
|
if (val < 0 || val > 1)
|
|
return -EINVAL;
|
|
|
|
lock_sock(sk);
|
|
msk->recvmsg_inq = !!val;
|
|
release_sock(sk);
|
|
return 0;
|
|
case TCP_ULP:
|
|
return -EOPNOTSUPP;
|
|
case TCP_CONGESTION:
|
|
return mptcp_setsockopt_sol_tcp_congestion(msk, optval, optlen);
|
|
case TCP_CORK:
|
|
return mptcp_setsockopt_sol_tcp_cork(msk, optval, optlen);
|
|
case TCP_NODELAY:
|
|
return mptcp_setsockopt_sol_tcp_nodelay(msk, optval, optlen);
|
|
case TCP_DEFER_ACCEPT:
|
|
/* See tcp.c: TCP_DEFER_ACCEPT does not fail */
|
|
mptcp_setsockopt_first_sf_only(msk, SOL_TCP, optname, optval, optlen);
|
|
return 0;
|
|
case TCP_FASTOPEN:
|
|
case TCP_FASTOPEN_CONNECT:
|
|
case TCP_FASTOPEN_KEY:
|
|
case TCP_FASTOPEN_NO_COOKIE:
|
|
return mptcp_setsockopt_first_sf_only(msk, SOL_TCP, optname,
|
|
optval, optlen);
|
|
}
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
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);
|
|
|
|
if (!mptcp_supported_sockopt(level, optname))
|
|
return -ENOPROTOOPT;
|
|
|
|
/* @@ 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_IP)
|
|
return mptcp_setsockopt_v4(msk, optname, optval, optlen);
|
|
|
|
if (level == SOL_IPV6)
|
|
return mptcp_setsockopt_v6(msk, optname, optval, optlen);
|
|
|
|
if (level == SOL_TCP)
|
|
return mptcp_setsockopt_sol_tcp(msk, optname, optval, optlen);
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int mptcp_getsockopt_first_sf_only(struct mptcp_sock *msk, int level, int optname,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sock *sk = (struct sock *)msk;
|
|
struct socket *ssock;
|
|
int ret;
|
|
struct sock *ssk;
|
|
|
|
lock_sock(sk);
|
|
ssk = msk->first;
|
|
if (ssk) {
|
|
ret = tcp_getsockopt(ssk, level, optname, optval, optlen);
|
|
goto out;
|
|
}
|
|
|
|
ssock = __mptcp_nmpc_socket(msk);
|
|
if (IS_ERR(ssock)) {
|
|
ret = PTR_ERR(ssock);
|
|
goto out;
|
|
}
|
|
|
|
ret = tcp_getsockopt(ssock->sk, level, optname, optval, optlen);
|
|
|
|
out:
|
|
release_sock(sk);
|
|
return ret;
|
|
}
|
|
|
|
void mptcp_diag_fill_info(struct mptcp_sock *msk, struct mptcp_info *info)
|
|
{
|
|
u32 flags = 0;
|
|
|
|
memset(info, 0, sizeof(*info));
|
|
|
|
info->mptcpi_subflows = READ_ONCE(msk->pm.subflows);
|
|
info->mptcpi_add_addr_signal = READ_ONCE(msk->pm.add_addr_signaled);
|
|
info->mptcpi_add_addr_accepted = READ_ONCE(msk->pm.add_addr_accepted);
|
|
info->mptcpi_local_addr_used = READ_ONCE(msk->pm.local_addr_used);
|
|
|
|
/* The following limits only make sense for the in-kernel PM */
|
|
if (mptcp_pm_is_kernel(msk)) {
|
|
info->mptcpi_subflows_max =
|
|
mptcp_pm_get_subflows_max(msk);
|
|
info->mptcpi_add_addr_signal_max =
|
|
mptcp_pm_get_add_addr_signal_max(msk);
|
|
info->mptcpi_add_addr_accepted_max =
|
|
mptcp_pm_get_add_addr_accept_max(msk);
|
|
info->mptcpi_local_addr_max =
|
|
mptcp_pm_get_local_addr_max(msk);
|
|
}
|
|
|
|
if (test_bit(MPTCP_FALLBACK_DONE, &msk->flags))
|
|
flags |= MPTCP_INFO_FLAG_FALLBACK;
|
|
if (READ_ONCE(msk->can_ack))
|
|
flags |= MPTCP_INFO_FLAG_REMOTE_KEY_RECEIVED;
|
|
info->mptcpi_flags = flags;
|
|
info->mptcpi_token = READ_ONCE(msk->token);
|
|
info->mptcpi_write_seq = READ_ONCE(msk->write_seq);
|
|
info->mptcpi_snd_una = READ_ONCE(msk->snd_una);
|
|
info->mptcpi_rcv_nxt = READ_ONCE(msk->ack_seq);
|
|
info->mptcpi_csum_enabled = READ_ONCE(msk->csum_enabled);
|
|
}
|
|
EXPORT_SYMBOL_GPL(mptcp_diag_fill_info);
|
|
|
|
static int mptcp_getsockopt_info(struct mptcp_sock *msk, char __user *optval, int __user *optlen)
|
|
{
|
|
struct mptcp_info m_info;
|
|
int len;
|
|
|
|
if (get_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
len = min_t(unsigned int, len, sizeof(struct mptcp_info));
|
|
|
|
mptcp_diag_fill_info(msk, &m_info);
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
if (copy_to_user(optval, &m_info, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mptcp_put_subflow_data(struct mptcp_subflow_data *sfd,
|
|
char __user *optval,
|
|
u32 copied,
|
|
int __user *optlen)
|
|
{
|
|
u32 copylen = min_t(u32, sfd->size_subflow_data, sizeof(*sfd));
|
|
|
|
if (copied)
|
|
copied += sfd->size_subflow_data;
|
|
else
|
|
copied = copylen;
|
|
|
|
if (put_user(copied, optlen))
|
|
return -EFAULT;
|
|
|
|
if (copy_to_user(optval, sfd, copylen))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mptcp_get_subflow_data(struct mptcp_subflow_data *sfd,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
int len, copylen;
|
|
|
|
if (get_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
/* if mptcp_subflow_data size is changed, need to adjust
|
|
* this function to deal with programs using old version.
|
|
*/
|
|
BUILD_BUG_ON(sizeof(*sfd) != MIN_INFO_OPTLEN_SIZE);
|
|
|
|
if (len < MIN_INFO_OPTLEN_SIZE)
|
|
return -EINVAL;
|
|
|
|
memset(sfd, 0, sizeof(*sfd));
|
|
|
|
copylen = min_t(unsigned int, len, sizeof(*sfd));
|
|
if (copy_from_user(sfd, optval, copylen))
|
|
return -EFAULT;
|
|
|
|
/* size_subflow_data is u32, but len is signed */
|
|
if (sfd->size_subflow_data > INT_MAX ||
|
|
sfd->size_user > INT_MAX)
|
|
return -EINVAL;
|
|
|
|
if (sfd->size_subflow_data < MIN_INFO_OPTLEN_SIZE ||
|
|
sfd->size_subflow_data > len)
|
|
return -EINVAL;
|
|
|
|
if (sfd->num_subflows || sfd->size_kernel)
|
|
return -EINVAL;
|
|
|
|
return len - sfd->size_subflow_data;
|
|
}
|
|
|
|
static int mptcp_getsockopt_tcpinfo(struct mptcp_sock *msk, char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct mptcp_subflow_context *subflow;
|
|
struct sock *sk = (struct sock *)msk;
|
|
unsigned int sfcount = 0, copied = 0;
|
|
struct mptcp_subflow_data sfd;
|
|
char __user *infoptr;
|
|
int len;
|
|
|
|
len = mptcp_get_subflow_data(&sfd, optval, optlen);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
sfd.size_kernel = sizeof(struct tcp_info);
|
|
sfd.size_user = min_t(unsigned int, sfd.size_user,
|
|
sizeof(struct tcp_info));
|
|
|
|
infoptr = optval + sfd.size_subflow_data;
|
|
|
|
lock_sock(sk);
|
|
|
|
mptcp_for_each_subflow(msk, subflow) {
|
|
struct sock *ssk = mptcp_subflow_tcp_sock(subflow);
|
|
|
|
++sfcount;
|
|
|
|
if (len && len >= sfd.size_user) {
|
|
struct tcp_info info;
|
|
|
|
tcp_get_info(ssk, &info);
|
|
|
|
if (copy_to_user(infoptr, &info, sfd.size_user)) {
|
|
release_sock(sk);
|
|
return -EFAULT;
|
|
}
|
|
|
|
infoptr += sfd.size_user;
|
|
copied += sfd.size_user;
|
|
len -= sfd.size_user;
|
|
}
|
|
}
|
|
|
|
release_sock(sk);
|
|
|
|
sfd.num_subflows = sfcount;
|
|
|
|
if (mptcp_put_subflow_data(&sfd, optval, copied, optlen))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void mptcp_get_sub_addrs(const struct sock *sk, struct mptcp_subflow_addrs *a)
|
|
{
|
|
const struct inet_sock *inet = inet_sk(sk);
|
|
|
|
memset(a, 0, sizeof(*a));
|
|
|
|
if (sk->sk_family == AF_INET) {
|
|
a->sin_local.sin_family = AF_INET;
|
|
a->sin_local.sin_port = inet->inet_sport;
|
|
a->sin_local.sin_addr.s_addr = inet->inet_rcv_saddr;
|
|
|
|
if (!a->sin_local.sin_addr.s_addr)
|
|
a->sin_local.sin_addr.s_addr = inet->inet_saddr;
|
|
|
|
a->sin_remote.sin_family = AF_INET;
|
|
a->sin_remote.sin_port = inet->inet_dport;
|
|
a->sin_remote.sin_addr.s_addr = inet->inet_daddr;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
} else if (sk->sk_family == AF_INET6) {
|
|
const struct ipv6_pinfo *np = inet6_sk(sk);
|
|
|
|
if (WARN_ON_ONCE(!np))
|
|
return;
|
|
|
|
a->sin6_local.sin6_family = AF_INET6;
|
|
a->sin6_local.sin6_port = inet->inet_sport;
|
|
|
|
if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
|
|
a->sin6_local.sin6_addr = np->saddr;
|
|
else
|
|
a->sin6_local.sin6_addr = sk->sk_v6_rcv_saddr;
|
|
|
|
a->sin6_remote.sin6_family = AF_INET6;
|
|
a->sin6_remote.sin6_port = inet->inet_dport;
|
|
a->sin6_remote.sin6_addr = sk->sk_v6_daddr;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
static int mptcp_getsockopt_subflow_addrs(struct mptcp_sock *msk, char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct mptcp_subflow_context *subflow;
|
|
struct sock *sk = (struct sock *)msk;
|
|
unsigned int sfcount = 0, copied = 0;
|
|
struct mptcp_subflow_data sfd;
|
|
char __user *addrptr;
|
|
int len;
|
|
|
|
len = mptcp_get_subflow_data(&sfd, optval, optlen);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
sfd.size_kernel = sizeof(struct mptcp_subflow_addrs);
|
|
sfd.size_user = min_t(unsigned int, sfd.size_user,
|
|
sizeof(struct mptcp_subflow_addrs));
|
|
|
|
addrptr = optval + sfd.size_subflow_data;
|
|
|
|
lock_sock(sk);
|
|
|
|
mptcp_for_each_subflow(msk, subflow) {
|
|
struct sock *ssk = mptcp_subflow_tcp_sock(subflow);
|
|
|
|
++sfcount;
|
|
|
|
if (len && len >= sfd.size_user) {
|
|
struct mptcp_subflow_addrs a;
|
|
|
|
mptcp_get_sub_addrs(ssk, &a);
|
|
|
|
if (copy_to_user(addrptr, &a, sfd.size_user)) {
|
|
release_sock(sk);
|
|
return -EFAULT;
|
|
}
|
|
|
|
addrptr += sfd.size_user;
|
|
copied += sfd.size_user;
|
|
len -= sfd.size_user;
|
|
}
|
|
}
|
|
|
|
release_sock(sk);
|
|
|
|
sfd.num_subflows = sfcount;
|
|
|
|
if (mptcp_put_subflow_data(&sfd, optval, copied, optlen))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mptcp_put_int_option(struct mptcp_sock *msk, char __user *optval,
|
|
int __user *optlen, int val)
|
|
{
|
|
int len;
|
|
|
|
if (get_user(len, optlen))
|
|
return -EFAULT;
|
|
if (len < 0)
|
|
return -EINVAL;
|
|
|
|
if (len < sizeof(int) && len > 0 && val >= 0 && val <= 255) {
|
|
unsigned char ucval = (unsigned char)val;
|
|
|
|
len = 1;
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &ucval, 1))
|
|
return -EFAULT;
|
|
} else {
|
|
len = min_t(unsigned int, len, sizeof(int));
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &val, len))
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mptcp_getsockopt_sol_tcp(struct mptcp_sock *msk, int optname,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
switch (optname) {
|
|
case TCP_ULP:
|
|
case TCP_CONGESTION:
|
|
case TCP_INFO:
|
|
case TCP_CC_INFO:
|
|
case TCP_DEFER_ACCEPT:
|
|
case TCP_FASTOPEN:
|
|
case TCP_FASTOPEN_CONNECT:
|
|
case TCP_FASTOPEN_KEY:
|
|
case TCP_FASTOPEN_NO_COOKIE:
|
|
return mptcp_getsockopt_first_sf_only(msk, SOL_TCP, optname,
|
|
optval, optlen);
|
|
case TCP_INQ:
|
|
return mptcp_put_int_option(msk, optval, optlen, msk->recvmsg_inq);
|
|
case TCP_CORK:
|
|
return mptcp_put_int_option(msk, optval, optlen, msk->cork);
|
|
case TCP_NODELAY:
|
|
return mptcp_put_int_option(msk, optval, optlen, msk->nodelay);
|
|
}
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int mptcp_getsockopt_v4(struct mptcp_sock *msk, int optname,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sock *sk = (void *)msk;
|
|
|
|
switch (optname) {
|
|
case IP_TOS:
|
|
return mptcp_put_int_option(msk, optval, optlen, inet_sk(sk)->tos);
|
|
}
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int mptcp_getsockopt_sol_mptcp(struct mptcp_sock *msk, int optname,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
switch (optname) {
|
|
case MPTCP_INFO:
|
|
return mptcp_getsockopt_info(msk, optval, optlen);
|
|
case MPTCP_TCPINFO:
|
|
return mptcp_getsockopt_tcpinfo(msk, optval, optlen);
|
|
case MPTCP_SUBFLOW_ADDRS:
|
|
return mptcp_getsockopt_subflow_addrs(msk, 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);
|
|
|
|
if (level == SOL_IP)
|
|
return mptcp_getsockopt_v4(msk, optname, optval, option);
|
|
if (level == SOL_TCP)
|
|
return mptcp_getsockopt_sol_tcp(msk, optname, optval, option);
|
|
if (level == SOL_MPTCP)
|
|
return mptcp_getsockopt_sol_mptcp(msk, optname, optval, option);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static void sync_socket_options(struct mptcp_sock *msk, struct sock *ssk)
|
|
{
|
|
static const unsigned int tx_rx_locks = SOCK_RCVBUF_LOCK | SOCK_SNDBUF_LOCK;
|
|
struct sock *sk = (struct sock *)msk;
|
|
|
|
if (ssk->sk_prot->keepalive) {
|
|
if (sock_flag(sk, SOCK_KEEPOPEN))
|
|
ssk->sk_prot->keepalive(ssk, 1);
|
|
else
|
|
ssk->sk_prot->keepalive(ssk, 0);
|
|
}
|
|
|
|
ssk->sk_priority = sk->sk_priority;
|
|
ssk->sk_bound_dev_if = sk->sk_bound_dev_if;
|
|
ssk->sk_incoming_cpu = sk->sk_incoming_cpu;
|
|
ssk->sk_ipv6only = sk->sk_ipv6only;
|
|
__ip_sock_set_tos(ssk, inet_sk(sk)->tos);
|
|
|
|
if (sk->sk_userlocks & tx_rx_locks) {
|
|
ssk->sk_userlocks |= sk->sk_userlocks & tx_rx_locks;
|
|
if (sk->sk_userlocks & SOCK_SNDBUF_LOCK)
|
|
WRITE_ONCE(ssk->sk_sndbuf, sk->sk_sndbuf);
|
|
if (sk->sk_userlocks & SOCK_RCVBUF_LOCK)
|
|
WRITE_ONCE(ssk->sk_rcvbuf, sk->sk_rcvbuf);
|
|
}
|
|
|
|
if (sock_flag(sk, SOCK_LINGER)) {
|
|
ssk->sk_lingertime = sk->sk_lingertime;
|
|
sock_set_flag(ssk, SOCK_LINGER);
|
|
} else {
|
|
sock_reset_flag(ssk, SOCK_LINGER);
|
|
}
|
|
|
|
if (sk->sk_mark != ssk->sk_mark) {
|
|
ssk->sk_mark = sk->sk_mark;
|
|
sk_dst_reset(ssk);
|
|
}
|
|
|
|
sock_valbool_flag(ssk, SOCK_DBG, sock_flag(sk, SOCK_DBG));
|
|
|
|
if (inet_csk(sk)->icsk_ca_ops != inet_csk(ssk)->icsk_ca_ops)
|
|
tcp_set_congestion_control(ssk, msk->ca_name, false, true);
|
|
__tcp_sock_set_cork(ssk, !!msk->cork);
|
|
__tcp_sock_set_nodelay(ssk, !!msk->nodelay);
|
|
|
|
inet_sk(ssk)->transparent = inet_sk(sk)->transparent;
|
|
inet_sk(ssk)->freebind = inet_sk(sk)->freebind;
|
|
}
|
|
|
|
static void __mptcp_sockopt_sync(struct mptcp_sock *msk, struct sock *ssk)
|
|
{
|
|
bool slow = lock_sock_fast(ssk);
|
|
|
|
sync_socket_options(msk, ssk);
|
|
|
|
unlock_sock_fast(ssk, slow);
|
|
}
|
|
|
|
void mptcp_sockopt_sync(struct mptcp_sock *msk, struct sock *ssk)
|
|
{
|
|
struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk);
|
|
|
|
msk_owned_by_me(msk);
|
|
|
|
if (READ_ONCE(subflow->setsockopt_seq) != msk->setsockopt_seq) {
|
|
__mptcp_sockopt_sync(msk, ssk);
|
|
|
|
subflow->setsockopt_seq = msk->setsockopt_seq;
|
|
}
|
|
}
|
|
|
|
void mptcp_sockopt_sync_locked(struct mptcp_sock *msk, struct sock *ssk)
|
|
{
|
|
struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk);
|
|
|
|
msk_owned_by_me(msk);
|
|
|
|
if (READ_ONCE(subflow->setsockopt_seq) != msk->setsockopt_seq) {
|
|
sync_socket_options(msk, ssk);
|
|
|
|
subflow->setsockopt_seq = msk->setsockopt_seq;
|
|
}
|
|
}
|