[PATCH net-next 7/8] mptcp: add the mibs for MP_PRIO

[Mat Martineau]

From: Geliang Tang <geliangt...@gmail.com>

This patch added the mibs for MP_PRIO, MPTCP_MIB_MPPRIOTX for transmitting
of the MP_PRIO suboption, and MPTCP_MIB_MPPRIORX for receiving of it.

Signed-off-by: Geliang Tang <geliangt...@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martin...@linux.intel.com>
---
 net/mptcp/mib.c        | 2 ++
 net/mptcp/mib.h        | 2 ++
 net/mptcp/options.c    | 1 +
 net/mptcp/pm_netlink.c | 2 ++
 4 files changed, 7 insertions(+)

diff --git a/net/mptcp/mib.c b/net/mptcp/mib.c
index b921cbdd9aaa..8ca196489893 100644
--- a/net/mptcp/mib.c
+++ b/net/mptcp/mib.c
@@ -31,6 +31,8 @@ static const struct snmp_mib mptcp_snmp_list[] = {
        SNMP_MIB_ITEM("EchoAdd", MPTCP_MIB_ECHOADD),
        SNMP_MIB_ITEM("RmAddr", MPTCP_MIB_RMADDR),
        SNMP_MIB_ITEM("RmSubflow", MPTCP_MIB_RMSUBFLOW),
+       SNMP_MIB_ITEM("MPPrioTx", MPTCP_MIB_MPPRIOTX),
+       SNMP_MIB_ITEM("MPPrioRx", MPTCP_MIB_MPPRIORX),
        SNMP_MIB_SENTINEL
 };
 
diff --git a/net/mptcp/mib.h b/net/mptcp/mib.h
index 47bcecce1106..63914a5ef6a5 100644
--- a/net/mptcp/mib.h
+++ b/net/mptcp/mib.h
@@ -24,6 +24,8 @@ enum linux_mptcp_mib_field {
        MPTCP_MIB_ECHOADD,              /* Received ADD_ADDR with echo-flag=1 */
        MPTCP_MIB_RMADDR,               /* Received RM_ADDR */
        MPTCP_MIB_RMSUBFLOW,            /* Remove a subflow */
+       MPTCP_MIB_MPPRIOTX,             /* Transmit a MP_PRIO */
+       MPTCP_MIB_MPPRIORX,             /* Received a MP_PRIO */
        __MPTCP_MIB_MAX
 };
 
diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index adfa96dd991c..c9643344a8d7 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -1034,6 +1034,7 @@ void mptcp_incoming_options(struct sock *sk, struct 
sk_buff *skb)
 
        if (mp_opt.mp_prio) {
                mptcp_pm_mp_prio_received(sk, mp_opt.backup);
+               MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPPRIORX);
                mp_opt.mp_prio = 0;
        }
 
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index 8f80099f1657..9b1f6298bbdb 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -452,6 +452,7 @@ int mptcp_pm_nl_mp_prio_send_ack(struct mptcp_sock *msk,
 
        mptcp_for_each_subflow(msk, subflow) {
                struct sock *ssk = mptcp_subflow_tcp_sock(subflow);
+               struct sock *sk = (struct sock *)msk;
                struct mptcp_addr_info local;
 
                local_address((struct sock_common *)ssk, &local);
@@ -461,6 +462,7 @@ int mptcp_pm_nl_mp_prio_send_ack(struct mptcp_sock *msk,
                subflow->backup = bkup;
                subflow->send_mp_prio = 1;
                subflow->request_bkup = bkup;
+               __MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPPRIOTX);
 
                spin_unlock_bh(&msk->pm.lock);
                pr_debug("send ack for mp_prio");
-- 
2.30.0