bonding: make IS_IP_TARGET_UNUSABLE_ADDRESS an inline function

Also, use standard IP primitives to check the address.

CC: Jay Vosburgh <j.vosburgh@gmail.com>
CC: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: Veaceslav Falico <vfalico@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_main.c

@@ -4195,7 +4195,7 @@ static int bond_check_params(struct bond_params *params)
 		   catch mistakes */
 		__be32 ip;
 		if (!in4_pton(arp_ip_target[i], -1, (u8 *)&ip, -1, NULL) ||
-		    IS_IP_TARGET_UNUSABLE_ADDRESS(ip)) {
+		    !bond_is_ip_target_ok(ip)) {
 			pr_warn("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
 				arp_ip_target[i]);
 			arp_interval = 0;

drivers/net/bonding/bond_options.c

@@ -942,7 +942,7 @@ static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 	__be32 *targets = bond->params.arp_targets;
 	int ind;
 
-	if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
+	if (!bond_is_ip_target_ok(target)) {
 		pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 		       bond->dev->name, &target);
 		return -EINVAL;
@@ -987,7 +987,7 @@ static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
 	unsigned long *targets_rx;
 	int ind, i;
 
-	if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
+	if (!bond_is_ip_target_ok(target)) {
 		pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 		       bond->dev->name, &target);
 		return -EINVAL;

drivers/net/bonding/bonding.h

@@ -54,9 +54,6 @@
 		     ((slave)->link == BOND_LINK_UP) && \
 		     bond_is_active_slave(slave))
 
-#define IS_IP_TARGET_UNUSABLE_ADDRESS(a)	\
-	((htonl(INADDR_BROADCAST) == a) ||	\
-	 ipv4_is_zeronet(a))
 /*
  * Less bad way to call ioctl from within the kernel; this needs to be
  * done some other way to get the call out of interrupt context.
@@ -406,6 +403,11 @@ static inline int slave_do_arp_validate_only(struct bonding *bond)
 	return bond->params.arp_validate & BOND_ARP_FILTER;
 }
 
+static inline int bond_is_ip_target_ok(__be32 addr)
+{
+	return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
+}
+
 /* Get the oldest arp which we've received on this slave for bond's
  * arp_targets.
  */