iplink: bond_slave: print actor and partner churn state

Add ability to print both actor and partner port churn states
(MONITOR/CHURN/NO_CHURN) via netlink attributes. This provides
visibility into the LACP churn detection state for bond slaves.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David Ahern <dsahern@kernel.org>

diff --git a/ip/iplink_bond_slave.c b/ip/iplink_bond_slave.c
index c88100e248dd39dc13a599fcd627b602e91a3cb0..f4b28fbca948267cbdfcb7b67d2c93dc6008a914 100644 (file)
--- a/ip/iplink_bond_slave.c
+++ b/ip/iplink_bond_slave.c
@@ -86,6 +86,12 @@ static void print_slave_oper_state(FILE *fp, const char *name, __u16 state)
        close_json_array(PRINT_ANY, "> ");
 }
 
+static const char *port_churn_state[] = {
+       "MONITOR",
+       "CHURN",
+       "NO_CHURN",
+};
+
 static void bond_slave_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
 {
        SPRINT_BUF(b1);
@@ -148,6 +154,26 @@ static void bond_slave_print_opt(struct link_util *lu, FILE *f, struct rtattr *t
                print_slave_oper_state(f, "ad_partner_oper_port_state_str", state);
        }
 
+       if (tb[IFLA_BOND_SLAVE_AD_CHURN_ACTOR_STATE]) {
+               __u8 state = rta_getattr_u8(tb[IFLA_BOND_SLAVE_AD_CHURN_ACTOR_STATE]);
+
+               if (state >= ARRAY_SIZE(port_churn_state))
+                       print_uint(PRINT_ANY, "churn_actor_state", "churn_actor_state %u ", state);
+               else
+                       print_string(PRINT_ANY, "churn_actor_state", "churn_actor_state %s ",
+                                    port_churn_state[state]);
+       }
+
+       if (tb[IFLA_BOND_SLAVE_AD_CHURN_PARTNER_STATE]) {
+               __u8 state = rta_getattr_u8(tb[IFLA_BOND_SLAVE_AD_CHURN_PARTNER_STATE]);
+
+               if (state >= ARRAY_SIZE(port_churn_state))
+                       print_uint(PRINT_ANY, "churn_partner_state", "churn_partner_state %u ", state);
+               else
+                       print_string(PRINT_ANY, "churn_partner_state", "churn_partner_state %s ",
+                                    port_churn_state[state]);
+       }
+
        if (tb[IFLA_BOND_SLAVE_ACTOR_PORT_PRIO])
                print_int(PRINT_ANY,
                          "actor_port_prio",