ip/bond: add broadcast_neighbor support

This option has no effect in modes other than 802.3ad mode.
When this option enabled, the bond device will broadcast ARP/ND
packets to all active slaves.

Signed-off-by: Tonghao Zhang <tonghao@bamaicloud.com>
Reviewed-by: Hangbin Liu <liuhangbin@gmail.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David Ahern <dsahern@kernel.org>

diff --git a/ip/iplink_bond.c b/ip/iplink_bond.c
index 3ae626a03e6e0dd91e819cc8e57a7e5c353543e0..714fe7bdca55f2e4945e34ba3c1ec0cf4e01b07e 100644 (file)
--- a/ip/iplink_bond.c
+++ b/ip/iplink_bond.c
@@ -150,6 +150,7 @@ static void print_explain(FILE *f)
                "                [ lacp_rate LACP_RATE ]\n"
                "                [ lacp_active LACP_ACTIVE]\n"
                "                [ coupled_control COUPLED_CONTROL ]\n"
+               "                [ broadcast_neighbor BROADCAST_NEIGHBOR ]\n"
                "                [ ad_select AD_SELECT ]\n"
                "                [ ad_user_port_key PORTKEY ]\n"
                "                [ ad_actor_sys_prio SYSPRIO ]\n"
@@ -166,6 +167,7 @@ static void print_explain(FILE *f)
                "LACP_RATE := slow|fast\n"
                "AD_SELECT := stable|bandwidth|count\n"
                "COUPLED_CONTROL := off|on\n"
+               "BROADCAST_NEIGHBOR := off|on\n"
        );
 }
 
@@ -185,6 +187,7 @@ static int bond_parse_opt(struct link_util *lu, int argc, char **argv,
        __u32 arp_all_targets, resend_igmp, min_links, lp_interval;
        __u32 packets_per_slave;
        __u8 missed_max;
+       __u8 broadcast_neighbor;
        unsigned int ifindex;
        int ret;
 
@@ -377,6 +380,12 @@ static int bond_parse_opt(struct link_util *lu, int argc, char **argv,
                        if (ret)
                                return ret;
                        addattr8(n, 1024, IFLA_BOND_COUPLED_CONTROL, coupled_control);
+               } else if (strcmp(*argv, "broadcast_neighbor") == 0) {
+                       NEXT_ARG();
+                       broadcast_neighbor = parse_on_off("broadcast_neighbor", *argv, &ret);
+                       if (ret)
+                               return ret;
+                       addattr8(n, 1024, IFLA_BOND_BROADCAST_NEIGH, broadcast_neighbor);
                } else if (matches(*argv, "ad_select") == 0) {
                        NEXT_ARG();
                        if (get_index(ad_select_tbl, *argv) < 0)
@@ -676,6 +685,13 @@ static void bond_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
                             rta_getattr_u8(tb[IFLA_BOND_COUPLED_CONTROL]));
        }
 
+       if (tb[IFLA_BOND_BROADCAST_NEIGH]) {
+               print_on_off(PRINT_ANY,
+                            "broadcast_neighbor",
+                            "broadcast_neighbor %s ",
+                            rta_getattr_u8(tb[IFLA_BOND_BROADCAST_NEIGH]));
+       }
+
        if (tb[IFLA_BOND_AD_SELECT]) {
                const char *ad_select = get_name(ad_select_tbl,
                                                 rta_getattr_u8(tb[IFLA_BOND_AD_SELECT]));