59 static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[],
92 static inline void tlb_init_slave(struct slave *slave)  in tlb_init_slave()  argument
94 	SLAVE_TLB_INFO(slave).load = 0;  in tlb_init_slave()
95 	SLAVE_TLB_INFO(slave).head = TLB_NULL_INDEX;  in tlb_init_slave()
98 static void __tlb_clear_slave(struct bonding *bond, struct slave *slave,  in __tlb_clear_slave()  argument
104 	/* clear slave from tx_hashtbl */  in __tlb_clear_slave()
109 		index = SLAVE_TLB_INFO(slave).head;  in __tlb_clear_slave()
117 	tlb_init_slave(slave);  in __tlb_clear_slave()
120 static void tlb_clear_slave(struct bonding *bond, struct slave *slave,  in tlb_clear_slave()  argument
124 	__tlb_clear_slave(bond, slave, save_load);  in tlb_clear_slave()
165 static long long compute_gap(struct slave *slave)  in compute_gap()  argument
167 	return (s64) (slave->speed << 20) - /* Convert to Megabit per sec */  in compute_gap()
168 	       (s64) (SLAVE_TLB_INFO(slave).load << 3); /* Bytes to bits */  in compute_gap()
171 static struct slave *tlb_get_least_loaded_slave(struct bonding *bond)  in tlb_get_least_loaded_slave()
173 	struct slave *slave, *least_loaded;  in tlb_get_least_loaded_slave()  local
180 	/* Find the slave with the largest gap */  in tlb_get_least_loaded_slave()
181 	bond_for_each_slave_rcu(bond, slave, iter) {  in tlb_get_least_loaded_slave()
182 		if (bond_slave_can_tx(slave)) {  in tlb_get_least_loaded_slave()
183 			long long gap = compute_gap(slave);  in tlb_get_least_loaded_slave()
186 				least_loaded = slave;  in tlb_get_least_loaded_slave()
195 static struct slave *__tlb_choose_channel(struct bonding *bond, u32 hash_index,  in __tlb_choose_channel()
200 	struct slave *assigned_slave;  in __tlb_choose_channel()
231 static struct slave *tlb_choose_channel(struct bonding *bond, u32 hash_index,  in tlb_choose_channel()
234 	struct slave *tx_slave;  in tlb_choose_channel()
277 			struct slave *slave)  in rlb_arp_recv()  argument
303 		slave_dbg(bond->dev, slave->dev, "Server received an ARP Reply from client\n");  in rlb_arp_recv()
310 static struct slave *__rlb_next_rx_slave(struct bonding *bond)  in __rlb_next_rx_slave()
313 	struct slave *before = NULL, *rx_slave = NULL, *slave;  in __rlb_next_rx_slave()  local
317 	bond_for_each_slave_rcu(bond, slave, iter) {  in __rlb_next_rx_slave()
318 		if (!bond_slave_can_tx(slave))  in __rlb_next_rx_slave()
321 			if (!before || before->speed < slave->speed)  in __rlb_next_rx_slave()
322 				before = slave;  in __rlb_next_rx_slave()
324 			if (!rx_slave || rx_slave->speed < slave->speed)  in __rlb_next_rx_slave()
325 				rx_slave = slave;  in __rlb_next_rx_slave()
327 		if (slave == bond_info->rx_slave)  in __rlb_next_rx_slave()
331 	 * better before and up to the current slave  in __rlb_next_rx_slave()
343 static struct slave *rlb_next_rx_slave(struct bonding *bond)  in rlb_next_rx_slave()
345 	struct slave *rx_slave;  in rlb_next_rx_slave()
356 /* teach the switch the mac of a disabled slave
363 	struct slave *curr_active = rtnl_dereference(bond->curr_active_slave);  in rlb_teach_disabled_mac_on_primary()
380 /* slave being removed should not be active at this point
384 static void rlb_clear_slave(struct bonding *bond, struct slave *slave)  in rlb_clear_slave()  argument
390 	/* clear slave from rx_hashtbl */  in rlb_clear_slave()
397 		if (rx_hash_table[index].slave == slave) {  in rlb_clear_slave()
398 			struct slave *assigned_slave = rlb_next_rx_slave(bond);  in rlb_clear_slave()
401 				rx_hash_table[index].slave = assigned_slave;  in rlb_clear_slave()
405 					/* A slave has been removed from the  in rlb_clear_slave()
415 			} else {  /* there is no active slave */  in rlb_clear_slave()
416 				rx_hash_table[index].slave = NULL;  in rlb_clear_slave()
423 	if (slave != rtnl_dereference(bond->curr_active_slave))  in rlb_clear_slave()
424 		rlb_teach_disabled_mac_on_primary(bond, slave->dev->dev_addr);  in rlb_clear_slave()
431 	if (!client_info->slave || !is_valid_ether_addr(client_info->mac_dst))  in rlb_update_client()
439 				 client_info->slave->dev,  in rlb_update_client()
442 				 client_info->slave->dev->dev_addr,  in rlb_update_client()
445 			slave_err(client_info->slave->bond->dev,  in rlb_update_client()
446 				  client_info->slave->dev,  in rlb_update_client()
451 		skb->dev = client_info->slave->dev;  in rlb_update_client()
490 /* The slave was assigned a new mac address - update the clients */
491 static void rlb_req_update_slave_clients(struct bonding *bond, struct slave *slave)  in rlb_req_update_slave_clients()  argument
505 		if ((client_info->slave == slave) &&  in rlb_req_update_slave_clients()
536 		if (!client_info->slave) {  in rlb_req_update_subnet_clients()
545 		    !ether_addr_equal_64bits(client_info->slave->dev->dev_addr,  in rlb_req_update_subnet_clients()
556 static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bond)  in rlb_choose_channel()
560 	struct slave *assigned_slave, *curr_active_slave;  in rlb_choose_channel()
581 			assigned_slave = client_info->slave;  in rlb_choose_channel()
592 			    client_info->slave != curr_active_slave) {  in rlb_choose_channel()
593 				client_info->slave = curr_active_slave;  in rlb_choose_channel()
598 	/* assign a new slave */  in rlb_choose_channel()
621 		client_info->slave = assigned_slave;  in rlb_choose_channel()
654 static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond)  in rlb_arp_xmit()
657 	struct slave *tx_slave = NULL;  in rlb_arp_xmit()
671 		netdev_dbg(bond->dev, "(slave %s): Server sent ARP Reply packet\n",  in rlb_arp_xmit()
688 		 * the primary slave. We must register these clients to be  in rlb_arp_xmit()
692 		netdev_dbg(bond->dev, "(slave %s): Server sent ARP Request packet\n",  in rlb_arp_xmit()
702 	struct slave *assigned_slave;  in rlb_rebalance()
715 		if (assigned_slave && (client_info->slave != assigned_slave)) {  in rlb_rebalance()
716 			client_info->slave = assigned_slave;  in rlb_rebalance()
736 	entry->slave = NULL;  in rlb_init_table_entry_dst()
905 static void alb_send_lp_vid(struct slave *slave, u8 mac_addr[],  in alb_send_lp_vid()  argument
927 	skb->dev = slave->dev;  in alb_send_lp_vid()
929 	slave_dbg(slave->bond->dev, slave->dev,  in alb_send_lp_vid()
940 	struct slave *slave;  member
950 	struct slave *slave = data->slave;  in alb_upper_dev_walk()  local
957 			alb_send_lp_vid(slave, mac_addr,  in alb_upper_dev_walk()
961 			alb_send_lp_vid(slave, upper->dev_addr,  in alb_upper_dev_walk()
974 		alb_send_lp_vid(slave, upper->dev_addr,  in alb_upper_dev_walk()
982 static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[],  in alb_send_learning_packets()  argument
985 	struct bonding *bond = bond_get_bond_by_slave(slave);  in alb_send_learning_packets()
989 		.slave = slave,  in alb_send_learning_packets()
994 	alb_send_lp_vid(slave, mac_addr, 0, 0);  in alb_send_learning_packets()
1004 static int alb_set_slave_mac_addr(struct slave *slave, u8 addr[],  in alb_set_slave_mac_addr()  argument
1007 	struct net_device *dev = slave->dev;  in alb_set_slave_mac_addr()
1010 	if (BOND_MODE(slave->bond) == BOND_MODE_TLB) {  in alb_set_slave_mac_addr()
1015 	/* for rlb each slave must have a unique hw mac addresses so that  in alb_set_slave_mac_addr()
1016 	 * each slave will receive packets destined to a different mac  in alb_set_slave_mac_addr()
1021 …slave_err(slave->bond->dev, dev, "dev_set_mac_address on slave failed! ALB mode requires that the …  in alb_set_slave_mac_addr()
1031 static void alb_swap_mac_addr(struct slave *slave1, struct slave *slave2)  in alb_swap_mac_addr()
1048 static void alb_fasten_mac_swap(struct bonding *bond, struct slave *slave1,  in alb_fasten_mac_swap()
1049 				struct slave *slave2)  in alb_fasten_mac_swap()
1052 	struct slave *disabled_slave = NULL;  in alb_fasten_mac_swap()
1082 		/* A disabled slave was assigned an active mac addr */  in alb_fasten_mac_swap()
1091  * @slave: the slave that was just detached
1093  * We assume that @slave was already detached from the slave list.
1095  * If @slave's permanent hw address is different both from its current
1097  * a slave that has @slave's permanet address as its current address.
1098  * We'll make sure that that slave no longer uses @slave's permanent address.
1102 static void alb_change_hw_addr_on_detach(struct bonding *bond, struct slave *slave)  in alb_change_hw_addr_on_detach()  argument
1106 	struct slave *found_slave;  in alb_change_hw_addr_on_detach()
1108 	perm_curr_diff = !ether_addr_equal_64bits(slave->perm_hwaddr,  in alb_change_hw_addr_on_detach()
1109 						  slave->dev->dev_addr);  in alb_change_hw_addr_on_detach()
1110 	perm_bond_diff = !ether_addr_equal_64bits(slave->perm_hwaddr,  in alb_change_hw_addr_on_detach()
1114 		found_slave = bond_slave_has_mac(bond, slave->perm_hwaddr);  in alb_change_hw_addr_on_detach()
1117 			alb_swap_mac_addr(slave, found_slave);  in alb_change_hw_addr_on_detach()
1118 			alb_fasten_mac_swap(bond, slave, found_slave);  in alb_change_hw_addr_on_detach()
1126  * @slave: the slave that was just attached
1128  * checks uniqueness of slave's mac address and handles the case the
1129  * new slave uses the bonds mac address.
1131  * If the permanent hw address of @slave is @bond's hw address, we need to
1132  * find a different hw address to give @slave, that isn't in use by any other
1133  * slave in the bond. This address must be, of course, one of the permanent
1136  * We go over the slave list, and for each slave there we compare its
1138  * If no match was found, then we've found a slave with a permanent address
1139  * that isn't used by any other slave in the bond, so we can assign it to
1140  * @slave.
1142  * assumption: this function is called before @slave is attached to the
1143  *	       bond slave list.
1145 static int alb_handle_addr_collision_on_attach(struct bonding *bond, struct slave *slave)  in alb_handle_addr_collision_on_attach()  argument
1147 	struct slave *has_bond_addr = rcu_access_pointer(bond->curr_active_slave);  in alb_handle_addr_collision_on_attach()
1148 	struct slave *tmp_slave1, *free_mac_slave = NULL;  in alb_handle_addr_collision_on_attach()
1152 		/* this is the first slave */  in alb_handle_addr_collision_on_attach()
1156 	/* if slave's mac address differs from bond's mac address  in alb_handle_addr_collision_on_attach()
1157 	 * check uniqueness of slave's mac address against the other  in alb_handle_addr_collision_on_attach()
1160 	if (!ether_addr_equal_64bits(slave->perm_hwaddr, bond->dev->dev_addr)) {  in alb_handle_addr_collision_on_attach()
1161 		if (!bond_slave_has_mac(bond, slave->dev->dev_addr))  in alb_handle_addr_collision_on_attach()
1164 		/* Try setting slave mac to bond address and fall-through  in alb_handle_addr_collision_on_attach()
1167 		alb_set_slave_mac_addr(slave, bond->dev->dev_addr,  in alb_handle_addr_collision_on_attach()
1171 	/* The slave's address is equal to the address of the bond.  in alb_handle_addr_collision_on_attach()
1172 	 * Search for a spare address in the bond for this slave.  in alb_handle_addr_collision_on_attach()
1176 			/* no slave has tmp_slave1's perm addr  in alb_handle_addr_collision_on_attach()
1193 		alb_set_slave_mac_addr(slave, free_mac_slave->perm_hwaddr,  in alb_handle_addr_collision_on_attach()
1196 …slave_warn(bond->dev, slave->dev, "the slave hw address is in use by the bond; giving it the hw ad…  in alb_handle_addr_collision_on_attach()
1200 …slave_err(bond->dev, slave->dev, "the slave hw address is in use by the bond; couldn't find a slav…  in alb_handle_addr_collision_on_attach()
1216  * For each slave, this function sets the interface to the new address and then
1223 	struct slave *slave, *rollback_slave;  in alb_set_mac_address()  local
1232 	bond_for_each_slave(bond, slave, iter) {  in alb_set_mac_address()
1234 		bond_hw_addr_copy(tmp_addr, slave->dev->dev_addr,  in alb_set_mac_address()
1235 				  slave->dev->addr_len);  in alb_set_mac_address()
1237 		res = dev_set_mac_address(slave->dev, addr, NULL);  in alb_set_mac_address()
1240 		bond_hw_addr_copy(slave->dev->dev_addr, tmp_addr,  in alb_set_mac_address()
1241 				  slave->dev->addr_len);  in alb_set_mac_address()
1253 	/* unwind from head to the slave that failed */  in alb_set_mac_address()
1255 		if (rollback_slave == slave)  in alb_set_mac_address()
1303 				    struct slave *tx_slave)  in bond_do_alb_xmit()
1341 	struct slave *tx_slave = NULL;  in bond_tlb_xmit()
1380 	struct slave *tx_slave = NULL;  in bond_alb_xmit()
1494 	struct slave *slave;  in bond_alb_monitor()  local
1511 		bond_for_each_slave_rcu(bond, slave, iter) {  in bond_alb_monitor()
1514 			 * use mac of the slave device.  in bond_alb_monitor()
1517 			strict_match = (slave != rcu_access_pointer(bond->curr_active_slave) ||  in bond_alb_monitor()
1519 			alb_send_learning_packets(slave, slave->dev->dev_addr,  in bond_alb_monitor()
1527 		bond_for_each_slave_rcu(bond, slave, iter) {  in bond_alb_monitor()
1528 			tlb_clear_slave(bond, slave, 1);  in bond_alb_monitor()
1529 			if (slave == rcu_access_pointer(bond->curr_active_slave)) {  in bond_alb_monitor()
1530 				SLAVE_TLB_INFO(slave).load =  in bond_alb_monitor()
1553 			 * because a slave was disabled then  in bond_alb_monitor()
1587 /* assumption: called before the slave is attached to the bond
1590 int bond_alb_init_slave(struct bonding *bond, struct slave *slave)  in bond_alb_init_slave()  argument
1594 	res = alb_set_slave_mac_addr(slave, slave->perm_hwaddr,  in bond_alb_init_slave()
1595 				     slave->dev->addr_len);  in bond_alb_init_slave()
1599 	res = alb_handle_addr_collision_on_attach(bond, slave);  in bond_alb_init_slave()
1603 	tlb_init_slave(slave);  in bond_alb_init_slave()
1614 /* Remove slave from tlb and rlb hash tables, and fix up MAC addresses
1619 void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave)  in bond_alb_deinit_slave()  argument
1622 		alb_change_hw_addr_on_detach(bond, slave);  in bond_alb_deinit_slave()
1624 	tlb_clear_slave(bond, slave, 0);  in bond_alb_deinit_slave()
1628 		rlb_clear_slave(bond, slave);  in bond_alb_deinit_slave()
1633 void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link)  in bond_alb_handle_link_change()  argument
1638 		tlb_clear_slave(bond, slave, 0);  in bond_alb_handle_link_change()
1640 			rlb_clear_slave(bond, slave);  in bond_alb_handle_link_change()
1656 			pr_err("Failed to build slave-array for TLB mode.\n");  in bond_alb_handle_link_change()
1663  * @new_slave: new slave to assign
1670 void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave)  in bond_alb_handle_active_change()
1672 	struct slave *swap_slave;  in bond_alb_handle_active_change()
1673 	struct slave *curr_active;  in bond_alb_handle_active_change()
1705 	/* in TLB mode, the slave might flip down/up with the old dev_addr,  in bond_alb_handle_active_change()
1745 	struct slave *curr_active;  in bond_alb_set_mac_address()
1746 	struct slave *swap_slave;  in bond_alb_set_mac_address()