mptcp: MP_FAIL suboption receiving
This patch added handling for receiving MP_FAIL suboption.
Add a new members mp_fail and fail_seq in struct mptcp_options_received.
When MP_FAIL suboption is received, set mp_fail to 1 and save the sequence
number to fail_seq.
Then invoke mptcp_pm_mp_fail_received to deal with the MP_FAIL suboption.
Signed-off-by: Geliang Tang <geliangtang@xiaomi.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index 3e4a79c..9ee5676 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -140,6 +140,7 @@ struct mptcp_options_received {
add_addr : 1,
rm_addr : 1,
mp_prio : 1,
+ mp_fail : 1,
echo : 1,
csum_reqd : 1,
backup : 1,
@@ -161,6 +162,7 @@ struct mptcp_options_received {
u64 ahmac;
u8 reset_reason:4;
u8 reset_transient:1;
+ u64 fail_seq;
};
static inline __be32 mptcp_option(u8 subopt, u8 len, u8 nib, u8 field)
@@ -726,6 +728,7 @@ void mptcp_pm_mp_prio_received(struct sock *sk, u8 bkup);
int mptcp_pm_nl_mp_prio_send_ack(struct mptcp_sock *msk,
struct mptcp_addr_info *addr,
u8 bkup);
+void mptcp_pm_mp_fail_received(struct sock *sk, u64 fail_seq);
void mptcp_pm_free_anno_list(struct mptcp_sock *msk);
bool mptcp_pm_sport_in_anno_list(struct mptcp_sock *msk, const struct sock *sk);
struct mptcp_pm_add_entry *
