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mptcp: sockopt: add TCP_DEFER_ACCEPT support 

Support this via passthrough to the underlying tcp listener socket.

Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/271
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Florian Westphal 2022-05-13 17:21:15 -07:00 committed by Jakub Kicinski
parent 0ea5374255
commit ea1e301d04
1 changed files with 15 additions and 0 deletions
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15
net/mptcp/sockopt.c
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@ -756,6 +756,18 @@ static int mptcp_setsockopt_v4(struct mptcp_sock *msk, int optname,
return -EOPNOTSUPP;
}
static int mptcp_setsockopt_sol_tcp_defer(struct mptcp_sock *msk, sockptr_t optval,
unsigned int optlen)
{
struct socket *listener;
listener = __mptcp_nmpc_socket(msk);
if (!listener)
return 0; /* TCP_DEFER_ACCEPT does not fail */
return tcp_setsockopt(listener->sk, SOL_TCP, TCP_DEFER_ACCEPT, optval, optlen);
}
static int mptcp_setsockopt_sol_tcp(struct mptcp_sock *msk, int optname,
sockptr_t optval, unsigned int optlen)
{
@ -782,6 +794,8 @@ static int mptcp_setsockopt_sol_tcp(struct mptcp_sock *msk, int optname,
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:
return mptcp_setsockopt_sol_tcp_defer(msk, optval, optlen);
}
return -EOPNOTSUPP;
@ -1142,6 +1156,7 @@ static int mptcp_getsockopt_sol_tcp(struct mptcp_sock *msk, int optname,
case TCP_CONGESTION:
case TCP_INFO:
case TCP_CC_INFO:
case TCP_DEFER_ACCEPT:
return mptcp_getsockopt_first_sf_only(msk, SOL_TCP, optname,
optval, optlen);
case TCP_INQ: