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mptcp: add TCP_FASTOPEN_NO_COOKIE support

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The goal of this socket option is to configure MPTCP + TFO without
cookie per socket.

It was already possible to enable TFO without a cookie per netns by
setting net.ipv4.tcp_fastopen sysctl knob to the right value. Per route
was also supported by setting 'fastopen_no_cookie' option. This patch
adds a per socket support like it is possible to do with TCP thanks to
TCP_FASTOPEN_NO_COOKIE socket option.

The only thing to do here is to relay the request to the first subflow
like it is already done for TCP_FASTOPEN_CONNECT.

Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Matthieu Baerts 2022-10-21 17:45:04 -07:00 • committed by Paolo Abeni
parent d3d429047c
commit e64d4deb4d
1 changed files with 5 additions and 2 deletions
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7
net/mptcp/sockopt.c
View file

@ -560,6 +560,7 @@ static bool mptcp_supported_sockopt(int level, int optname)
case TCP_TX_DELAY:
case TCP_INQ:
case TCP_FASTOPEN_CONNECT:
case TCP_FASTOPEN_NO_COOKIE:
return true;
}
@ -568,8 +569,8 @@ 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_NO_COOKIE,
* are not supported fastopen is currently unsupported
/* TCP_FASTOPEN_KEY, TCP_FASTOPEN are not supported because
* fastopen for the listener side is currently unsupported
*/
}
return false;
@ -811,6 +812,7 @@ static int mptcp_setsockopt_sol_tcp(struct mptcp_sock *msk, int optname,
case TCP_DEFER_ACCEPT:
return mptcp_setsockopt_sol_tcp_defer(msk, optval, optlen);
case TCP_FASTOPEN_CONNECT:
case TCP_FASTOPEN_NO_COOKIE:
return mptcp_setsockopt_first_sf_only(msk, SOL_TCP, optname,
optval, optlen);
}
@ -1175,6 +1177,7 @@ static int mptcp_getsockopt_sol_tcp(struct mptcp_sock *msk, int optname,
case TCP_CC_INFO:
case TCP_DEFER_ACCEPT:
case TCP_FASTOPEN_CONNECT:
case TCP_FASTOPEN_NO_COOKIE:
return mptcp_getsockopt_first_sf_only(msk, SOL_TCP, optname,
optval, optlen);
case TCP_INQ: