[PATCH iproute2 next v3] bond: add mac_filter option

[Jonathan Toppins <jtoppins@redhat.com>]

Add ability to set bonding option `mac_filter`. Values greater than zero
represent the maximum hashtable size the mac filter is allowed to grow
to, zero disables the filter.

Signed-off-by: Jonathan Toppins <jtoppins@redhat.com>
---

v3: refresh patch to keep in-sync with next/master, no other changes
    since v1.

 include/uapi/linux/if_link.h |  1 +
 ip/iplink_bond.c             | 15 +++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 34002e72d10a..85f5f07f5153 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -932,6 +932,7 @@ enum {
 	IFLA_BOND_AD_LACP_ACTIVE,
 	IFLA_BOND_MISSED_MAX,
 	IFLA_BOND_NS_IP6_TARGET,
+	IFLA_BOND_MAC_FILTER,
 	__IFLA_BOND_MAX,
 };
 
diff --git a/ip/iplink_bond.c b/ip/iplink_bond.c
index 15db19a3d3c2..07c823329a91 100644
--- a/ip/iplink_bond.c
+++ b/ip/iplink_bond.c
@@ -157,6 +157,7 @@ static void print_explain(FILE *f)
 		"                [ ad_actor_sys_prio SYSPRIO ]\n"
 		"                [ ad_actor_system LLADDR ]\n"
 		"                [ arp_missed_max MISSED_MAX ]\n"
+		"                [ mac_filter HASH_SIZE ]\n"
 		"\n"
 		"BONDMODE := balance-rr|active-backup|balance-xor|broadcast|802.3ad|balance-tlb|balance-alb\n"
 		"ARP_VALIDATE := none|active|backup|all|filter|filter_active|filter_backup\n"
@@ -410,6 +411,14 @@ static int bond_parse_opt(struct link_util *lu, int argc, char **argv,
 			}
 			addattr8(n, 1024, IFLA_BOND_TLB_DYNAMIC_LB,
 				 tlb_dynamic_lb);
+		} else if (matches(*argv, "mac_filter") == 0) {
+			__u8 mac_filter;
+			NEXT_ARG();
+			if (get_u8(&mac_filter, *argv, 0)) {
+				invarg("invalid mac_filter", *argv);
+				return -1;
+			}
+			addattr8(n, 1024, IFLA_BOND_MAC_FILTER, mac_filter);
 		} else if (matches(*argv, "help") == 0) {
 			explain();
 			return -1;
@@ -491,6 +500,12 @@ static void bond_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
 			   "arp_missed_max %u ",
 			   rta_getattr_u8(tb[IFLA_BOND_MISSED_MAX]));
 
+	if (tb[IFLA_BOND_MAC_FILTER])
+		print_uint(PRINT_ANY,
+			   "mac_filter",
+			   "mac_filter %u ",
+			   rta_getattr_u8(tb[IFLA_BOND_MAC_FILTER]));
+
 	if (tb[IFLA_BOND_ARP_IP_TARGET]) {
 		struct rtattr *iptb[BOND_MAX_ARP_TARGETS + 1];
 
-- 
2.27.0