Commit 41b3c69b authored May 02, 2022 by Kishen Maloor Committed by Jakub Kicinski May 03, 2022

mptcp: expose server_side attribute in MPTCP netlink events

This change records the 'server_side' attribute of MPTCP_EVENT_CREATED
and MPTCP_EVENT_ESTABLISHED events to inform their recipient about the
Client/Server role of the running MPTCP application.

Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/246


Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Kishen Maloor <kishen.maloor@intel.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

parent 70c708e8

include/uapi/linux/mptcp.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -188,6 +188,7 @@ enum mptcp_event_attr {
		MPTCP_ATTR_IF_IDX, /* s32 */
		MPTCP_ATTR_RESET_REASON,/* u32 */
		MPTCP_ATTR_RESET_FLAGS, /* u32 */
		MPTCP_ATTR_SERVER_SIDE, /* u8 */

		__MPTCP_ATTR_AFTER_LAST
		};

net/mptcp/pm_netlink.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1985,6 +1985,9 @@ static int mptcp_event_created(struct sk_buff *skb,
		if (err)
		return err;

		if (nla_put_u8(skb, MPTCP_ATTR_SERVER_SIDE, READ_ONCE(msk->pm.server_side)))
		return -EMSGSIZE;

		return mptcp_event_add_subflow(skb, ssk);
		}