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mptcp: sockopt: add SOL_IP freebind & transparent options 

These options also need to be set before bind, so do the sync of msk to
new ssk socket a bit earlier.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Westphal 2021-11-19 12:41:36 -08:00 committed by David S. Miller
parent ffcacff87c
commit c9406a23c1
2 changed files with 67 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

66
net/mptcp/sockopt.c
View File

@ -390,6 +390,8 @@ static int mptcp_setsockopt_v6(struct mptcp_sock *msk, int optname,
switch (optname) {
case IPV6_V6ONLY:
case IPV6_TRANSPARENT:
case IPV6_FREEBIND:
lock_sock(sk);
ssock = __mptcp_nmpc_socket(msk);
if (!ssock) {
@ -398,8 +400,24 @@ static int mptcp_setsockopt_v6(struct mptcp_sock *msk, int optname,
}
ret = tcp_setsockopt(ssock->sk, SOL_IPV6, optname, optval, optlen);
if (ret == 0)
if (ret != 0) {
release_sock(sk);
return ret;
}
sockopt_seq_inc(msk);
switch (optname) {
case IPV6_V6ONLY:
sk->sk_ipv6only = ssock->sk->sk_ipv6only;
break;
case IPV6_TRANSPARENT:
inet_sk(sk)->transparent = inet_sk(ssock->sk)->transparent;
break;
case IPV6_FREEBIND:
inet_sk(sk)->freebind = inet_sk(ssock->sk)->freebind;
break;
}
release_sock(sk);
break;
@ -598,6 +616,46 @@ static int mptcp_setsockopt_sol_tcp_congestion(struct mptcp_sock *msk, sockptr_t
return ret;
}
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 (!ssock) {
release_sock(sk);
return -EINVAL;
}
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)
{
@ -627,6 +685,9 @@ 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);
}
@ -1068,6 +1129,9 @@ static void sync_socket_options(struct mptcp_sock *msk, struct sock *ssk)
if (inet_csk(sk)->icsk_ca_ops != inet_csk(ssk)->icsk_ca_ops)
tcp_set_congestion_control(ssk, msk->ca_name, false, true);
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)

3
net/mptcp/subflow.c
View File

@ -1425,6 +1425,8 @@ int __mptcp_subflow_connect(struct sock *sk, const struct mptcp_addr_info *loc,
if (addr.ss_family == AF_INET6)
addrlen = sizeof(struct sockaddr_in6);
#endif
mptcp_sockopt_sync(msk, ssk);
ssk->sk_bound_dev_if = ifindex;
err = kernel_bind(sf, (struct sockaddr *)&addr, addrlen);
if (err)
@ -1441,7 +1443,6 @@ int __mptcp_subflow_connect(struct sock *sk, const struct mptcp_addr_info *loc,
mptcp_info2sockaddr(remote, &addr, ssk->sk_family);
mptcp_add_pending_subflow(msk, subflow);
mptcp_sockopt_sync(msk, ssk);
err = kernel_connect(sf, (struct sockaddr *)&addr, addrlen, O_NONBLOCK);
if (err && err != -EINPROGRESS)
goto failed_unlink;