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authorBenjamin Hesmans <benjamin.hesmans@tessares.net>2022-09-26 16:27:36 -0700
committerJakub Kicinski <kuba@kernel.org>2022-09-28 18:52:03 -0700
commit54635bd047019513288f3cd3192cc5490912bd8c (patch)
treeed731266452b25a648b05216f7934fc413daf005 /net/mptcp
parent63a8bf85568b30438431d4d78afb2fde4a280760 (diff)
downloadlinux-54635bd047019513288f3cd3192cc5490912bd8c.tar.bz2
mptcp: add TCP_FASTOPEN_CONNECT socket option
Set the option for the first subflow only. For the other subflows TFO can't be used because a mapping would be needed to cover the data in the SYN. Acked-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Benjamin Hesmans <benjamin.hesmans@tessares.net> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/mptcp')
-rw-r--r--net/mptcp/sockopt.c19
1 files changed, 18 insertions, 1 deletions
diff --git a/net/mptcp/sockopt.c b/net/mptcp/sockopt.c
index 423d3826ca1e..c7cb68c725b2 100644
--- a/net/mptcp/sockopt.c
+++ b/net/mptcp/sockopt.c
@@ -559,6 +559,7 @@ static bool mptcp_supported_sockopt(int level, int optname)
case TCP_NOTSENT_LOWAT:
case TCP_TX_DELAY:
case TCP_INQ:
+ case TCP_FASTOPEN_CONNECT:
return true;
}
@@ -567,7 +568,7 @@ static bool mptcp_supported_sockopt(int level, int optname)
/* TCP_REPAIR, TCP_REPAIR_QUEUE, TCP_QUEUE_SEQ, TCP_REPAIR_OPTIONS,
* TCP_REPAIR_WINDOW are not supported, better avoid this mess
*/
- /* TCP_FASTOPEN_KEY, TCP_FASTOPEN TCP_FASTOPEN_CONNECT, TCP_FASTOPEN_NO_COOKIE,
+ /* TCP_FASTOPEN_KEY, TCP_FASTOPEN, TCP_FASTOPEN_NO_COOKIE,
* are not supported fastopen is currently unsupported
*/
}
@@ -768,6 +769,19 @@ static int mptcp_setsockopt_sol_tcp_defer(struct mptcp_sock *msk, sockptr_t optv
return tcp_setsockopt(listener->sk, SOL_TCP, TCP_DEFER_ACCEPT, optval, optlen);
}
+static int mptcp_setsockopt_sol_tcp_fastopen_connect(struct mptcp_sock *msk, sockptr_t optval,
+ unsigned int optlen)
+{
+ struct socket *sock;
+
+ /* Limit to first subflow */
+ sock = __mptcp_nmpc_socket(msk);
+ if (!sock)
+ return -EINVAL;
+
+ return tcp_setsockopt(sock->sk, SOL_TCP, TCP_FASTOPEN_CONNECT, optval, optlen);
+}
+
static int mptcp_setsockopt_sol_tcp(struct mptcp_sock *msk, int optname,
sockptr_t optval, unsigned int optlen)
{
@@ -796,6 +810,8 @@ static int mptcp_setsockopt_sol_tcp(struct mptcp_sock *msk, int optname,
return mptcp_setsockopt_sol_tcp_nodelay(msk, optval, optlen);
case TCP_DEFER_ACCEPT:
return mptcp_setsockopt_sol_tcp_defer(msk, optval, optlen);
+ case TCP_FASTOPEN_CONNECT:
+ return mptcp_setsockopt_sol_tcp_fastopen_connect(msk, optval, optlen);
}
return -EOPNOTSUPP;
@@ -1157,6 +1173,7 @@ static int mptcp_getsockopt_sol_tcp(struct mptcp_sock *msk, int optname,
case TCP_INFO:
case TCP_CC_INFO:
case TCP_DEFER_ACCEPT:
+ case TCP_FASTOPEN_CONNECT:
return mptcp_getsockopt_first_sf_only(msk, SOL_TCP, optname,
optval, optlen);
case TCP_INQ: