net/bonding/bond_alb.c

20 #include <net/arp.h>
56 static void rlb_purge_src_ip(struct bonding *bond, struct arp_pkt *arp);
248 static void rlb_update_entry_from_arp(struct bonding *bond, struct arp_pkt *arp)
256 	hash_index = _simple_hash((u8 *)&(arp->ip_src), sizeof(arp->ip_src));
260 	    (client_info->ip_src == arp->ip_dst) &&
261 	    (client_info->ip_dst == arp->ip_src) &&
262 	    (!ether_addr_equal_64bits(client_info->mac_dst, arp->mac_src))) {
264 		ether_addr_copy(client_info->mac_dst, arp->mac_src);
275 	struct arp_pkt *arp, _arp;
280 	arp = skb_header_pointer(skb, 0, sizeof(_arp), &_arp);
281 	if (!arp)
284 	/* We received an ARP from arp->ip_src.
287 	 * However, if arp->mac_src is different than what is stored in
294 	rlb_purge_src_ip(bond, arp);
296 	if (arp->op_code == htons(ARPOP_REPLY)) {
298 		rlb_update_entry_from_arp(bond, arp);
555 					const struct arp_pkt *arp)
566 	hash_index = _simple_hash((u8 *)&arp->ip_dst, sizeof(arp->ip_dst));
570 		if ((client_info->ip_src == arp->ip_src) &&
571 		    (client_info->ip_dst == arp->ip_dst)) {
573 			if (!is_broadcast_ether_addr(arp->mac_dst)) {
574 				/* update mac address from arp */
575 				ether_addr_copy(client_info->mac_dst, arp->mac_dst);
577 			ether_addr_copy(client_info->mac_src, arp->mac_src);
601 		      client_info->ip_src == arp->ip_src)) {
605 			u32 hash_src = _simple_hash((u8 *)&arp->ip_src,
606 						    sizeof(arp->ip_src));
611 		client_info->ip_src = arp->ip_src;
612 		client_info->ip_dst = arp->ip_dst;
613 		/* arp->mac_dst is broadcast for arp requests.
615 		 * upon receiving an arp reply.
617 		ether_addr_copy(client_info->mac_dst, arp->mac_dst);
618 		ether_addr_copy(client_info->mac_src, arp->mac_src);
649 /* chooses (and returns) transmit channel for arp reply
650  * does not choose channel for other arp types since they are
657 	struct arp_pkt *arp;
659 	if (!pskb_network_may_pull(skb, sizeof(*arp)))
661 	arp = (struct arp_pkt *)skb_network_header(skb);
666 	if (!bond_slave_has_mac_rcu(bond, arp->mac_src))
669 	dev = ip_dev_find(dev_net(bond->dev), arp->ip_src);
678 	if (arp->op_code == htons(ARPOP_REPLY)) {
679 		/* the arp must be sent on the selected rx channel */
680 		tx_slave = rlb_choose_channel(skb, bond, arp);
682 			bond_hw_addr_copy(arp->mac_src, tx_slave->dev->dev_addr,
686 	} else if (arp->op_code == htons(ARPOP_REQUEST)) {
689 		 * When the arp reply is received the entry will be updated
692 		tx_slave = rlb_choose_channel(skb, bond, arp);
699 		/* arp requests are broadcast and are sent on the primary
700 		 * the arp request will collapse all clients on the subnet to
704 		rlb_req_update_subnet_clients(bond, arp->ip_src);
831 /* deletes all rx_hashtbl entries with arp->ip_src if their mac_src does
832  * not match arp->mac_src
834 static void rlb_purge_src_ip(struct bonding *bond, struct arp_pkt *arp)
837 	u32 ip_src_hash = _simple_hash((u8 *)&(arp->ip_src), sizeof(arp->ip_src));
847 		if (entry->ip_src == arp->ip_src &&
848 		    !ether_addr_equal_64bits(arp->mac_src, entry->mac_src))
1695 			 * not work because the rebalance arp replies will