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mptcp: expose server_side attribute in MPTCP netlink events

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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>
This commit is contained in:
Kishen Maloor 2022-05-02 13:52:36 -07:00 committed by Jakub Kicinski
parent 70c708e826
commit 41b3c69bf9
2 changed files with 4 additions and 0 deletions
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1
include/uapi/linux/mptcp.h
View file

@ -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
};

3
net/mptcp/pm_netlink.c
View file

@ -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);
}