2 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25 #include <linux/skbuff.h>
26 #include <linux/netdevice.h>
27 #include <linux/etherdevice.h>
28 #include <linux/pkt_sched.h>
29 #include <linux/spinlock.h>
30 #include <linux/slab.h>
31 #include <linux/timer.h>
33 #include <linux/ipv6.h>
34 #include <linux/if_arp.h>
35 #include <linux/if_ether.h>
36 #include <linux/if_bonding.h>
37 #include <linux/if_vlan.h>
42 #include <asm/byteorder.h>
48 #ifndef __long_aligned
49 #define __long_aligned __attribute__((aligned((sizeof(long)))))
51 static const u8 mac_bcast
[ETH_ALEN
] __long_aligned
= {
52 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
54 static const u8 mac_v6_allmcast
[ETH_ALEN
] __long_aligned
= {
55 0x33, 0x33, 0x00, 0x00, 0x00, 0x01
57 static const int alb_delta_in_ticks
= HZ
/ ALB_TIMER_TICKS_PER_SEC
;
64 u8 padding
[ETH_ZLEN
- ETH_HLEN
];
69 __be16 prot_addr_space
;
73 u8 mac_src
[ETH_ALEN
]; /* sender hardware address */
74 __be32 ip_src
; /* sender IP address */
75 u8 mac_dst
[ETH_ALEN
]; /* target hardware address */
76 __be32 ip_dst
; /* target IP address */
80 static inline struct arp_pkt
*arp_pkt(const struct sk_buff
*skb
)
82 return (struct arp_pkt
*)skb_network_header(skb
);
85 /* Forward declaration */
86 static void alb_send_learning_packets(struct slave
*slave
, u8 mac_addr
[]);
88 static inline u8
_simple_hash(const u8
*hash_start
, int hash_size
)
93 for (i
= 0; i
< hash_size
; i
++) {
94 hash
^= hash_start
[i
];
100 /*********************** tlb specific functions ***************************/
102 static inline void _lock_tx_hashtbl(struct bonding
*bond
)
104 spin_lock_bh(&(BOND_ALB_INFO(bond
).tx_hashtbl_lock
));
107 static inline void _unlock_tx_hashtbl(struct bonding
*bond
)
109 spin_unlock_bh(&(BOND_ALB_INFO(bond
).tx_hashtbl_lock
));
112 /* Caller must hold tx_hashtbl lock */
113 static inline void tlb_init_table_entry(struct tlb_client_info
*entry
, int save_load
)
116 entry
->load_history
= 1 + entry
->tx_bytes
/
117 BOND_TLB_REBALANCE_INTERVAL
;
121 entry
->tx_slave
= NULL
;
122 entry
->next
= TLB_NULL_INDEX
;
123 entry
->prev
= TLB_NULL_INDEX
;
126 static inline void tlb_init_slave(struct slave
*slave
)
128 SLAVE_TLB_INFO(slave
).load
= 0;
129 SLAVE_TLB_INFO(slave
).head
= TLB_NULL_INDEX
;
132 /* Caller must hold bond lock for read */
133 static void tlb_clear_slave(struct bonding
*bond
, struct slave
*slave
, int save_load
)
135 struct tlb_client_info
*tx_hash_table
;
138 _lock_tx_hashtbl(bond
);
140 /* clear slave from tx_hashtbl */
141 tx_hash_table
= BOND_ALB_INFO(bond
).tx_hashtbl
;
143 /* skip this if we've already freed the tx hash table */
145 index
= SLAVE_TLB_INFO(slave
).head
;
146 while (index
!= TLB_NULL_INDEX
) {
147 u32 next_index
= tx_hash_table
[index
].next
;
148 tlb_init_table_entry(&tx_hash_table
[index
], save_load
);
153 tlb_init_slave(slave
);
155 _unlock_tx_hashtbl(bond
);
158 /* Must be called before starting the monitor timer */
159 static int tlb_initialize(struct bonding
*bond
)
161 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
162 int size
= TLB_HASH_TABLE_SIZE
* sizeof(struct tlb_client_info
);
163 struct tlb_client_info
*new_hashtbl
;
166 new_hashtbl
= kzalloc(size
, GFP_KERNEL
);
168 pr_err("%s: Error: Failed to allocate TLB hash table\n",
172 _lock_tx_hashtbl(bond
);
174 bond_info
->tx_hashtbl
= new_hashtbl
;
176 for (i
= 0; i
< TLB_HASH_TABLE_SIZE
; i
++) {
177 tlb_init_table_entry(&bond_info
->tx_hashtbl
[i
], 1);
180 _unlock_tx_hashtbl(bond
);
185 /* Must be called only after all slaves have been released */
186 static void tlb_deinitialize(struct bonding
*bond
)
188 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
190 _lock_tx_hashtbl(bond
);
192 kfree(bond_info
->tx_hashtbl
);
193 bond_info
->tx_hashtbl
= NULL
;
195 _unlock_tx_hashtbl(bond
);
198 static long long compute_gap(struct slave
*slave
)
200 return (s64
) (slave
->speed
<< 20) - /* Convert to Megabit per sec */
201 (s64
) (SLAVE_TLB_INFO(slave
).load
<< 3); /* Bytes to bits */
204 /* Caller must hold bond lock for read */
205 static struct slave
*tlb_get_least_loaded_slave(struct bonding
*bond
)
207 struct slave
*slave
, *least_loaded
;
214 /* Find the slave with the largest gap */
215 bond_for_each_slave(bond
, slave
, i
) {
216 if (SLAVE_IS_OK(slave
)) {
217 long long gap
= compute_gap(slave
);
220 least_loaded
= slave
;
229 /* Caller must hold bond lock for read */
230 static struct slave
*tlb_choose_channel(struct bonding
*bond
, u32 hash_index
, u32 skb_len
)
232 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
233 struct tlb_client_info
*hash_table
;
234 struct slave
*assigned_slave
;
236 _lock_tx_hashtbl(bond
);
238 hash_table
= bond_info
->tx_hashtbl
;
239 assigned_slave
= hash_table
[hash_index
].tx_slave
;
240 if (!assigned_slave
) {
241 assigned_slave
= tlb_get_least_loaded_slave(bond
);
243 if (assigned_slave
) {
244 struct tlb_slave_info
*slave_info
=
245 &(SLAVE_TLB_INFO(assigned_slave
));
246 u32 next_index
= slave_info
->head
;
248 hash_table
[hash_index
].tx_slave
= assigned_slave
;
249 hash_table
[hash_index
].next
= next_index
;
250 hash_table
[hash_index
].prev
= TLB_NULL_INDEX
;
252 if (next_index
!= TLB_NULL_INDEX
) {
253 hash_table
[next_index
].prev
= hash_index
;
256 slave_info
->head
= hash_index
;
258 hash_table
[hash_index
].load_history
;
262 if (assigned_slave
) {
263 hash_table
[hash_index
].tx_bytes
+= skb_len
;
266 _unlock_tx_hashtbl(bond
);
268 return assigned_slave
;
271 /*********************** rlb specific functions ***************************/
272 static inline void _lock_rx_hashtbl(struct bonding
*bond
)
274 spin_lock_bh(&(BOND_ALB_INFO(bond
).rx_hashtbl_lock
));
277 static inline void _unlock_rx_hashtbl(struct bonding
*bond
)
279 spin_unlock_bh(&(BOND_ALB_INFO(bond
).rx_hashtbl_lock
));
282 /* when an ARP REPLY is received from a client update its info
285 static void rlb_update_entry_from_arp(struct bonding
*bond
, struct arp_pkt
*arp
)
287 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
288 struct rlb_client_info
*client_info
;
291 _lock_rx_hashtbl(bond
);
293 hash_index
= _simple_hash((u8
*)&(arp
->ip_src
), sizeof(arp
->ip_src
));
294 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
296 if ((client_info
->assigned
) &&
297 (client_info
->ip_src
== arp
->ip_dst
) &&
298 (client_info
->ip_dst
== arp
->ip_src
) &&
299 (compare_ether_addr_64bits(client_info
->mac_dst
, arp
->mac_src
))) {
300 /* update the clients MAC address */
301 memcpy(client_info
->mac_dst
, arp
->mac_src
, ETH_ALEN
);
302 client_info
->ntt
= 1;
303 bond_info
->rx_ntt
= 1;
306 _unlock_rx_hashtbl(bond
);
309 static int rlb_arp_recv(struct sk_buff
*skb
, struct net_device
*bond_dev
, struct packet_type
*ptype
, struct net_device
*orig_dev
)
311 struct bonding
*bond
;
312 struct arp_pkt
*arp
= (struct arp_pkt
*)skb
->data
;
313 int res
= NET_RX_DROP
;
315 while (bond_dev
->priv_flags
& IFF_802_1Q_VLAN
)
316 bond_dev
= vlan_dev_real_dev(bond_dev
);
318 if (!(bond_dev
->priv_flags
& IFF_BONDING
) ||
319 !(bond_dev
->flags
& IFF_MASTER
))
323 pr_debug("Packet has no ARP data\n");
327 skb
= skb_share_check(skb
, GFP_ATOMIC
);
331 if (!pskb_may_pull(skb
, arp_hdr_len(bond_dev
)))
334 if (skb
->len
< sizeof(struct arp_pkt
)) {
335 pr_debug("Packet is too small to be an ARP\n");
339 if (arp
->op_code
== htons(ARPOP_REPLY
)) {
340 /* update rx hash table for this ARP */
341 bond
= netdev_priv(bond_dev
);
342 rlb_update_entry_from_arp(bond
, arp
);
343 pr_debug("Server received an ARP Reply from client\n");
346 res
= NET_RX_SUCCESS
;
354 /* Caller must hold bond lock for read */
355 static struct slave
*rlb_next_rx_slave(struct bonding
*bond
)
357 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
358 struct slave
*rx_slave
, *slave
, *start_at
;
361 if (bond_info
->next_rx_slave
) {
362 start_at
= bond_info
->next_rx_slave
;
364 start_at
= bond
->first_slave
;
369 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
370 if (SLAVE_IS_OK(slave
)) {
373 } else if (slave
->speed
> rx_slave
->speed
) {
380 bond_info
->next_rx_slave
= rx_slave
->next
;
386 /* teach the switch the mac of a disabled slave
387 * on the primary for fault tolerance
389 * Caller must hold bond->curr_slave_lock for write or bond lock for write
391 static void rlb_teach_disabled_mac_on_primary(struct bonding
*bond
, u8 addr
[])
393 if (!bond
->curr_active_slave
) {
397 if (!bond
->alb_info
.primary_is_promisc
) {
398 if (!dev_set_promiscuity(bond
->curr_active_slave
->dev
, 1))
399 bond
->alb_info
.primary_is_promisc
= 1;
401 bond
->alb_info
.primary_is_promisc
= 0;
404 bond
->alb_info
.rlb_promisc_timeout_counter
= 0;
406 alb_send_learning_packets(bond
->curr_active_slave
, addr
);
409 /* slave being removed should not be active at this point
411 * Caller must hold bond lock for read
413 static void rlb_clear_slave(struct bonding
*bond
, struct slave
*slave
)
415 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
416 struct rlb_client_info
*rx_hash_table
;
417 u32 index
, next_index
;
419 /* clear slave from rx_hashtbl */
420 _lock_rx_hashtbl(bond
);
422 rx_hash_table
= bond_info
->rx_hashtbl
;
423 index
= bond_info
->rx_hashtbl_head
;
424 for (; index
!= RLB_NULL_INDEX
; index
= next_index
) {
425 next_index
= rx_hash_table
[index
].next
;
426 if (rx_hash_table
[index
].slave
== slave
) {
427 struct slave
*assigned_slave
= rlb_next_rx_slave(bond
);
429 if (assigned_slave
) {
430 rx_hash_table
[index
].slave
= assigned_slave
;
431 if (compare_ether_addr_64bits(rx_hash_table
[index
].mac_dst
,
433 bond_info
->rx_hashtbl
[index
].ntt
= 1;
434 bond_info
->rx_ntt
= 1;
435 /* A slave has been removed from the
436 * table because it is either disabled
437 * or being released. We must retry the
438 * update to avoid clients from not
439 * being updated & disconnecting when
442 bond_info
->rlb_update_retry_counter
=
445 } else { /* there is no active slave */
446 rx_hash_table
[index
].slave
= NULL
;
451 _unlock_rx_hashtbl(bond
);
453 write_lock_bh(&bond
->curr_slave_lock
);
455 if (slave
!= bond
->curr_active_slave
) {
456 rlb_teach_disabled_mac_on_primary(bond
, slave
->dev
->dev_addr
);
459 write_unlock_bh(&bond
->curr_slave_lock
);
462 static void rlb_update_client(struct rlb_client_info
*client_info
)
466 if (!client_info
->slave
) {
470 for (i
= 0; i
< RLB_ARP_BURST_SIZE
; i
++) {
473 skb
= arp_create(ARPOP_REPLY
, ETH_P_ARP
,
475 client_info
->slave
->dev
,
477 client_info
->mac_dst
,
478 client_info
->slave
->dev
->dev_addr
,
479 client_info
->mac_dst
);
481 pr_err("%s: Error: failed to create an ARP packet\n",
482 client_info
->slave
->dev
->master
->name
);
486 skb
->dev
= client_info
->slave
->dev
;
488 if (client_info
->tag
) {
489 skb
= vlan_put_tag(skb
, client_info
->vlan_id
);
491 pr_err("%s: Error: failed to insert VLAN tag\n",
492 client_info
->slave
->dev
->master
->name
);
501 /* sends ARP REPLIES that update the clients that need updating */
502 static void rlb_update_rx_clients(struct bonding
*bond
)
504 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
505 struct rlb_client_info
*client_info
;
508 _lock_rx_hashtbl(bond
);
510 hash_index
= bond_info
->rx_hashtbl_head
;
511 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
512 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
513 if (client_info
->ntt
) {
514 rlb_update_client(client_info
);
515 if (bond_info
->rlb_update_retry_counter
== 0) {
516 client_info
->ntt
= 0;
521 /* do not update the entries again until this counter is zero so that
522 * not to confuse the clients.
524 bond_info
->rlb_update_delay_counter
= RLB_UPDATE_DELAY
;
526 _unlock_rx_hashtbl(bond
);
529 /* The slave was assigned a new mac address - update the clients */
530 static void rlb_req_update_slave_clients(struct bonding
*bond
, struct slave
*slave
)
532 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
533 struct rlb_client_info
*client_info
;
537 _lock_rx_hashtbl(bond
);
539 hash_index
= bond_info
->rx_hashtbl_head
;
540 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
541 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
543 if ((client_info
->slave
== slave
) &&
544 compare_ether_addr_64bits(client_info
->mac_dst
, mac_bcast
)) {
545 client_info
->ntt
= 1;
550 // update the team's flag only after the whole iteration
552 bond_info
->rx_ntt
= 1;
554 bond_info
->rlb_update_retry_counter
= RLB_UPDATE_RETRY
;
557 _unlock_rx_hashtbl(bond
);
560 /* mark all clients using src_ip to be updated */
561 static void rlb_req_update_subnet_clients(struct bonding
*bond
, __be32 src_ip
)
563 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
564 struct rlb_client_info
*client_info
;
567 _lock_rx_hashtbl(bond
);
569 hash_index
= bond_info
->rx_hashtbl_head
;
570 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
571 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
573 if (!client_info
->slave
) {
574 pr_err("%s: Error: found a client with no channel in the client's hash table\n",
578 /*update all clients using this src_ip, that are not assigned
579 * to the team's address (curr_active_slave) and have a known
580 * unicast mac address.
582 if ((client_info
->ip_src
== src_ip
) &&
583 compare_ether_addr_64bits(client_info
->slave
->dev
->dev_addr
,
584 bond
->dev
->dev_addr
) &&
585 compare_ether_addr_64bits(client_info
->mac_dst
, mac_bcast
)) {
586 client_info
->ntt
= 1;
587 bond_info
->rx_ntt
= 1;
591 _unlock_rx_hashtbl(bond
);
594 /* Caller must hold both bond and ptr locks for read */
595 static struct slave
*rlb_choose_channel(struct sk_buff
*skb
, struct bonding
*bond
)
597 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
598 struct arp_pkt
*arp
= arp_pkt(skb
);
599 struct slave
*assigned_slave
;
600 struct rlb_client_info
*client_info
;
603 _lock_rx_hashtbl(bond
);
605 hash_index
= _simple_hash((u8
*)&arp
->ip_dst
, sizeof(arp
->ip_src
));
606 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
608 if (client_info
->assigned
) {
609 if ((client_info
->ip_src
== arp
->ip_src
) &&
610 (client_info
->ip_dst
== arp
->ip_dst
)) {
611 /* the entry is already assigned to this client */
612 if (compare_ether_addr_64bits(arp
->mac_dst
, mac_bcast
)) {
613 /* update mac address from arp */
614 memcpy(client_info
->mac_dst
, arp
->mac_dst
, ETH_ALEN
);
617 assigned_slave
= client_info
->slave
;
618 if (assigned_slave
) {
619 _unlock_rx_hashtbl(bond
);
620 return assigned_slave
;
623 /* the entry is already assigned to some other client,
624 * move the old client to primary (curr_active_slave) so
625 * that the new client can be assigned to this entry.
627 if (bond
->curr_active_slave
&&
628 client_info
->slave
!= bond
->curr_active_slave
) {
629 client_info
->slave
= bond
->curr_active_slave
;
630 rlb_update_client(client_info
);
634 /* assign a new slave */
635 assigned_slave
= rlb_next_rx_slave(bond
);
637 if (assigned_slave
) {
638 client_info
->ip_src
= arp
->ip_src
;
639 client_info
->ip_dst
= arp
->ip_dst
;
640 /* arp->mac_dst is broadcast for arp reqeusts.
641 * will be updated with clients actual unicast mac address
642 * upon receiving an arp reply.
644 memcpy(client_info
->mac_dst
, arp
->mac_dst
, ETH_ALEN
);
645 client_info
->slave
= assigned_slave
;
647 if (compare_ether_addr_64bits(client_info
->mac_dst
, mac_bcast
)) {
648 client_info
->ntt
= 1;
649 bond
->alb_info
.rx_ntt
= 1;
651 client_info
->ntt
= 0;
655 if (!vlan_get_tag(skb
, &client_info
->vlan_id
))
656 client_info
->tag
= 1;
659 if (!client_info
->assigned
) {
660 u32 prev_tbl_head
= bond_info
->rx_hashtbl_head
;
661 bond_info
->rx_hashtbl_head
= hash_index
;
662 client_info
->next
= prev_tbl_head
;
663 if (prev_tbl_head
!= RLB_NULL_INDEX
) {
664 bond_info
->rx_hashtbl
[prev_tbl_head
].prev
=
667 client_info
->assigned
= 1;
671 _unlock_rx_hashtbl(bond
);
673 return assigned_slave
;
676 /* chooses (and returns) transmit channel for arp reply
677 * does not choose channel for other arp types since they are
678 * sent on the curr_active_slave
680 static struct slave
*rlb_arp_xmit(struct sk_buff
*skb
, struct bonding
*bond
)
682 struct arp_pkt
*arp
= arp_pkt(skb
);
683 struct slave
*tx_slave
= NULL
;
685 if (arp
->op_code
== htons(ARPOP_REPLY
)) {
686 /* the arp must be sent on the selected
689 tx_slave
= rlb_choose_channel(skb
, bond
);
691 memcpy(arp
->mac_src
,tx_slave
->dev
->dev_addr
, ETH_ALEN
);
693 pr_debug("Server sent ARP Reply packet\n");
694 } else if (arp
->op_code
== htons(ARPOP_REQUEST
)) {
695 /* Create an entry in the rx_hashtbl for this client as a
697 * When the arp reply is received the entry will be updated
698 * with the correct unicast address of the client.
700 rlb_choose_channel(skb
, bond
);
702 /* The ARP relpy packets must be delayed so that
703 * they can cancel out the influence of the ARP request.
705 bond
->alb_info
.rlb_update_delay_counter
= RLB_UPDATE_DELAY
;
707 /* arp requests are broadcast and are sent on the primary
708 * the arp request will collapse all clients on the subnet to
709 * the primary slave. We must register these clients to be
710 * updated with their assigned mac.
712 rlb_req_update_subnet_clients(bond
, arp
->ip_src
);
713 pr_debug("Server sent ARP Request packet\n");
719 /* Caller must hold bond lock for read */
720 static void rlb_rebalance(struct bonding
*bond
)
722 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
723 struct slave
*assigned_slave
;
724 struct rlb_client_info
*client_info
;
728 _lock_rx_hashtbl(bond
);
731 hash_index
= bond_info
->rx_hashtbl_head
;
732 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
733 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
734 assigned_slave
= rlb_next_rx_slave(bond
);
735 if (assigned_slave
&& (client_info
->slave
!= assigned_slave
)) {
736 client_info
->slave
= assigned_slave
;
737 client_info
->ntt
= 1;
742 /* update the team's flag only after the whole iteration */
744 bond_info
->rx_ntt
= 1;
746 _unlock_rx_hashtbl(bond
);
749 /* Caller must hold rx_hashtbl lock */
750 static void rlb_init_table_entry(struct rlb_client_info
*entry
)
752 memset(entry
, 0, sizeof(struct rlb_client_info
));
753 entry
->next
= RLB_NULL_INDEX
;
754 entry
->prev
= RLB_NULL_INDEX
;
757 static int rlb_initialize(struct bonding
*bond
)
759 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
760 struct packet_type
*pk_type
= &(BOND_ALB_INFO(bond
).rlb_pkt_type
);
761 struct rlb_client_info
*new_hashtbl
;
762 int size
= RLB_HASH_TABLE_SIZE
* sizeof(struct rlb_client_info
);
765 new_hashtbl
= kmalloc(size
, GFP_KERNEL
);
767 pr_err("%s: Error: Failed to allocate RLB hash table\n",
771 _lock_rx_hashtbl(bond
);
773 bond_info
->rx_hashtbl
= new_hashtbl
;
775 bond_info
->rx_hashtbl_head
= RLB_NULL_INDEX
;
777 for (i
= 0; i
< RLB_HASH_TABLE_SIZE
; i
++) {
778 rlb_init_table_entry(bond_info
->rx_hashtbl
+ i
);
781 _unlock_rx_hashtbl(bond
);
783 /*initialize packet type*/
784 pk_type
->type
= cpu_to_be16(ETH_P_ARP
);
785 pk_type
->dev
= bond
->dev
;
786 pk_type
->func
= rlb_arp_recv
;
788 /* register to receive ARPs */
789 dev_add_pack(pk_type
);
794 static void rlb_deinitialize(struct bonding
*bond
)
796 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
798 dev_remove_pack(&(bond_info
->rlb_pkt_type
));
800 _lock_rx_hashtbl(bond
);
802 kfree(bond_info
->rx_hashtbl
);
803 bond_info
->rx_hashtbl
= NULL
;
804 bond_info
->rx_hashtbl_head
= RLB_NULL_INDEX
;
806 _unlock_rx_hashtbl(bond
);
809 static void rlb_clear_vlan(struct bonding
*bond
, unsigned short vlan_id
)
811 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
814 _lock_rx_hashtbl(bond
);
816 curr_index
= bond_info
->rx_hashtbl_head
;
817 while (curr_index
!= RLB_NULL_INDEX
) {
818 struct rlb_client_info
*curr
= &(bond_info
->rx_hashtbl
[curr_index
]);
819 u32 next_index
= bond_info
->rx_hashtbl
[curr_index
].next
;
820 u32 prev_index
= bond_info
->rx_hashtbl
[curr_index
].prev
;
822 if (curr
->tag
&& (curr
->vlan_id
== vlan_id
)) {
823 if (curr_index
== bond_info
->rx_hashtbl_head
) {
824 bond_info
->rx_hashtbl_head
= next_index
;
826 if (prev_index
!= RLB_NULL_INDEX
) {
827 bond_info
->rx_hashtbl
[prev_index
].next
= next_index
;
829 if (next_index
!= RLB_NULL_INDEX
) {
830 bond_info
->rx_hashtbl
[next_index
].prev
= prev_index
;
833 rlb_init_table_entry(curr
);
836 curr_index
= next_index
;
839 _unlock_rx_hashtbl(bond
);
842 /*********************** tlb/rlb shared functions *********************/
844 static void alb_send_learning_packets(struct slave
*slave
, u8 mac_addr
[])
846 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
847 struct learning_pkt pkt
;
848 int size
= sizeof(struct learning_pkt
);
851 memset(&pkt
, 0, size
);
852 memcpy(pkt
.mac_dst
, mac_addr
, ETH_ALEN
);
853 memcpy(pkt
.mac_src
, mac_addr
, ETH_ALEN
);
854 pkt
.type
= cpu_to_be16(ETH_P_LOOP
);
856 for (i
= 0; i
< MAX_LP_BURST
; i
++) {
860 skb
= dev_alloc_skb(size
);
865 data
= skb_put(skb
, size
);
866 memcpy(data
, &pkt
, size
);
868 skb_reset_mac_header(skb
);
869 skb
->network_header
= skb
->mac_header
+ ETH_HLEN
;
870 skb
->protocol
= pkt
.type
;
871 skb
->priority
= TC_PRIO_CONTROL
;
872 skb
->dev
= slave
->dev
;
875 struct vlan_entry
*vlan
;
877 vlan
= bond_next_vlan(bond
,
878 bond
->alb_info
.current_alb_vlan
);
880 bond
->alb_info
.current_alb_vlan
= vlan
;
886 skb
= vlan_put_tag(skb
, vlan
->vlan_id
);
888 pr_err("%s: Error: failed to insert VLAN tag\n",
898 /* hw is a boolean parameter that determines whether we should try and
899 * set the hw address of the device as well as the hw address of the
902 static int alb_set_slave_mac_addr(struct slave
*slave
, u8 addr
[], int hw
)
904 struct net_device
*dev
= slave
->dev
;
905 struct sockaddr s_addr
;
908 memcpy(dev
->dev_addr
, addr
, dev
->addr_len
);
912 /* for rlb each slave must have a unique hw mac addresses so that */
913 /* each slave will receive packets destined to a different mac */
914 memcpy(s_addr
.sa_data
, addr
, dev
->addr_len
);
915 s_addr
.sa_family
= dev
->type
;
916 if (dev_set_mac_address(dev
, &s_addr
)) {
917 pr_err("%s: Error: dev_set_mac_address of dev %s failed!\n"
918 "ALB mode requires that the base driver support setting the hw address also when the network device's interface is open\n",
919 dev
->master
->name
, dev
->name
);
926 * Swap MAC addresses between two slaves.
928 * Called with RTNL held, and no other locks.
932 static void alb_swap_mac_addr(struct bonding
*bond
, struct slave
*slave1
, struct slave
*slave2
)
934 u8 tmp_mac_addr
[ETH_ALEN
];
936 memcpy(tmp_mac_addr
, slave1
->dev
->dev_addr
, ETH_ALEN
);
937 alb_set_slave_mac_addr(slave1
, slave2
->dev
->dev_addr
, bond
->alb_info
.rlb_enabled
);
938 alb_set_slave_mac_addr(slave2
, tmp_mac_addr
, bond
->alb_info
.rlb_enabled
);
943 * Send learning packets after MAC address swap.
945 * Called with RTNL and no other locks
947 static void alb_fasten_mac_swap(struct bonding
*bond
, struct slave
*slave1
,
948 struct slave
*slave2
)
950 int slaves_state_differ
= (SLAVE_IS_OK(slave1
) != SLAVE_IS_OK(slave2
));
951 struct slave
*disabled_slave
= NULL
;
955 /* fasten the change in the switch */
956 if (SLAVE_IS_OK(slave1
)) {
957 alb_send_learning_packets(slave1
, slave1
->dev
->dev_addr
);
958 if (bond
->alb_info
.rlb_enabled
) {
959 /* inform the clients that the mac address
962 rlb_req_update_slave_clients(bond
, slave1
);
965 disabled_slave
= slave1
;
968 if (SLAVE_IS_OK(slave2
)) {
969 alb_send_learning_packets(slave2
, slave2
->dev
->dev_addr
);
970 if (bond
->alb_info
.rlb_enabled
) {
971 /* inform the clients that the mac address
974 rlb_req_update_slave_clients(bond
, slave2
);
977 disabled_slave
= slave2
;
980 if (bond
->alb_info
.rlb_enabled
&& slaves_state_differ
) {
981 /* A disabled slave was assigned an active mac addr */
982 rlb_teach_disabled_mac_on_primary(bond
,
983 disabled_slave
->dev
->dev_addr
);
988 * alb_change_hw_addr_on_detach
989 * @bond: bonding we're working on
990 * @slave: the slave that was just detached
992 * We assume that @slave was already detached from the slave list.
994 * If @slave's permanent hw address is different both from its current
995 * address and from @bond's address, then somewhere in the bond there's
996 * a slave that has @slave's permanet address as its current address.
997 * We'll make sure that that slave no longer uses @slave's permanent address.
999 * Caller must hold RTNL and no other locks
1001 static void alb_change_hw_addr_on_detach(struct bonding
*bond
, struct slave
*slave
)
1006 perm_curr_diff
= compare_ether_addr_64bits(slave
->perm_hwaddr
,
1007 slave
->dev
->dev_addr
);
1008 perm_bond_diff
= compare_ether_addr_64bits(slave
->perm_hwaddr
,
1009 bond
->dev
->dev_addr
);
1011 if (perm_curr_diff
&& perm_bond_diff
) {
1012 struct slave
*tmp_slave
;
1015 bond_for_each_slave(bond
, tmp_slave
, i
) {
1016 if (!compare_ether_addr_64bits(slave
->perm_hwaddr
,
1017 tmp_slave
->dev
->dev_addr
)) {
1024 /* locking: needs RTNL and nothing else */
1025 alb_swap_mac_addr(bond
, slave
, tmp_slave
);
1026 alb_fasten_mac_swap(bond
, slave
, tmp_slave
);
1032 * alb_handle_addr_collision_on_attach
1033 * @bond: bonding we're working on
1034 * @slave: the slave that was just attached
1036 * checks uniqueness of slave's mac address and handles the case the
1037 * new slave uses the bonds mac address.
1039 * If the permanent hw address of @slave is @bond's hw address, we need to
1040 * find a different hw address to give @slave, that isn't in use by any other
1041 * slave in the bond. This address must be, of course, one of the premanent
1042 * addresses of the other slaves.
1044 * We go over the slave list, and for each slave there we compare its
1045 * permanent hw address with the current address of all the other slaves.
1046 * If no match was found, then we've found a slave with a permanent address
1047 * that isn't used by any other slave in the bond, so we can assign it to
1050 * assumption: this function is called before @slave is attached to the
1053 * caller must hold the bond lock for write since the mac addresses are compared
1054 * and may be swapped.
1056 static int alb_handle_addr_collision_on_attach(struct bonding
*bond
, struct slave
*slave
)
1058 struct slave
*tmp_slave1
, *tmp_slave2
, *free_mac_slave
;
1059 struct slave
*has_bond_addr
= bond
->curr_active_slave
;
1060 int i
, j
, found
= 0;
1062 if (bond
->slave_cnt
== 0) {
1063 /* this is the first slave */
1067 /* if slave's mac address differs from bond's mac address
1068 * check uniqueness of slave's mac address against the other
1069 * slaves in the bond.
1071 if (compare_ether_addr_64bits(slave
->perm_hwaddr
, bond
->dev
->dev_addr
)) {
1072 bond_for_each_slave(bond
, tmp_slave1
, i
) {
1073 if (!compare_ether_addr_64bits(tmp_slave1
->dev
->dev_addr
,
1074 slave
->dev
->dev_addr
)) {
1083 /* Try setting slave mac to bond address and fall-through
1084 to code handling that situation below... */
1085 alb_set_slave_mac_addr(slave
, bond
->dev
->dev_addr
,
1086 bond
->alb_info
.rlb_enabled
);
1089 /* The slave's address is equal to the address of the bond.
1090 * Search for a spare address in the bond for this slave.
1092 free_mac_slave
= NULL
;
1094 bond_for_each_slave(bond
, tmp_slave1
, i
) {
1096 bond_for_each_slave(bond
, tmp_slave2
, j
) {
1097 if (!compare_ether_addr_64bits(tmp_slave1
->perm_hwaddr
,
1098 tmp_slave2
->dev
->dev_addr
)) {
1105 /* no slave has tmp_slave1's perm addr
1108 free_mac_slave
= tmp_slave1
;
1112 if (!has_bond_addr
) {
1113 if (!compare_ether_addr_64bits(tmp_slave1
->dev
->dev_addr
,
1114 bond
->dev
->dev_addr
)) {
1116 has_bond_addr
= tmp_slave1
;
1121 if (free_mac_slave
) {
1122 alb_set_slave_mac_addr(slave
, free_mac_slave
->perm_hwaddr
,
1123 bond
->alb_info
.rlb_enabled
);
1125 pr_warning("%s: Warning: the hw address of slave %s is in use by the bond; giving it the hw address of %s\n",
1126 bond
->dev
->name
, slave
->dev
->name
,
1127 free_mac_slave
->dev
->name
);
1129 } else if (has_bond_addr
) {
1130 pr_err("%s: Error: the hw address of slave %s is in use by the bond; couldn't find a slave with a free hw address to give it (this should not have happened)\n",
1131 bond
->dev
->name
, slave
->dev
->name
);
1139 * alb_set_mac_address
1143 * In TLB mode all slaves are configured to the bond's hw address, but set
1144 * their dev_addr field to different addresses (based on their permanent hw
1147 * For each slave, this function sets the interface to the new address and then
1148 * changes its dev_addr field to its previous value.
1150 * Unwinding assumes bond's mac address has not yet changed.
1152 static int alb_set_mac_address(struct bonding
*bond
, void *addr
)
1155 struct slave
*slave
, *stop_at
;
1156 char tmp_addr
[ETH_ALEN
];
1160 if (bond
->alb_info
.rlb_enabled
) {
1164 bond_for_each_slave(bond
, slave
, i
) {
1165 /* save net_device's current hw address */
1166 memcpy(tmp_addr
, slave
->dev
->dev_addr
, ETH_ALEN
);
1168 res
= dev_set_mac_address(slave
->dev
, addr
);
1170 /* restore net_device's hw address */
1171 memcpy(slave
->dev
->dev_addr
, tmp_addr
, ETH_ALEN
);
1180 memcpy(sa
.sa_data
, bond
->dev
->dev_addr
, bond
->dev
->addr_len
);
1181 sa
.sa_family
= bond
->dev
->type
;
1183 /* unwind from head to the slave that failed */
1185 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
1186 memcpy(tmp_addr
, slave
->dev
->dev_addr
, ETH_ALEN
);
1187 dev_set_mac_address(slave
->dev
, &sa
);
1188 memcpy(slave
->dev
->dev_addr
, tmp_addr
, ETH_ALEN
);
1194 /************************ exported alb funcions ************************/
1196 int bond_alb_initialize(struct bonding
*bond
, int rlb_enabled
)
1200 res
= tlb_initialize(bond
);
1206 bond
->alb_info
.rlb_enabled
= 1;
1207 /* initialize rlb */
1208 res
= rlb_initialize(bond
);
1210 tlb_deinitialize(bond
);
1214 bond
->alb_info
.rlb_enabled
= 0;
1220 void bond_alb_deinitialize(struct bonding
*bond
)
1222 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1224 tlb_deinitialize(bond
);
1226 if (bond_info
->rlb_enabled
) {
1227 rlb_deinitialize(bond
);
1231 int bond_alb_xmit(struct sk_buff
*skb
, struct net_device
*bond_dev
)
1233 struct bonding
*bond
= netdev_priv(bond_dev
);
1234 struct ethhdr
*eth_data
;
1235 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1236 struct slave
*tx_slave
= NULL
;
1237 static const __be32 ip_bcast
= htonl(0xffffffff);
1239 int do_tx_balance
= 1;
1241 const u8
*hash_start
= NULL
;
1243 struct ipv6hdr
*ip6hdr
;
1245 skb_reset_mac_header(skb
);
1246 eth_data
= eth_hdr(skb
);
1248 /* make sure that the curr_active_slave and the slaves list do
1249 * not change during tx
1251 read_lock(&bond
->lock
);
1252 read_lock(&bond
->curr_slave_lock
);
1254 if (!BOND_IS_OK(bond
)) {
1258 switch (ntohs(skb
->protocol
)) {
1260 const struct iphdr
*iph
= ip_hdr(skb
);
1262 if (!compare_ether_addr_64bits(eth_data
->h_dest
, mac_bcast
) ||
1263 (iph
->daddr
== ip_bcast
) ||
1264 (iph
->protocol
== IPPROTO_IGMP
)) {
1268 hash_start
= (char *)&(iph
->daddr
);
1269 hash_size
= sizeof(iph
->daddr
);
1273 /* IPv6 doesn't really use broadcast mac address, but leave
1274 * that here just in case.
1276 if (!compare_ether_addr_64bits(eth_data
->h_dest
, mac_bcast
)) {
1281 /* IPv6 uses all-nodes multicast as an equivalent to
1282 * broadcasts in IPv4.
1284 if (!compare_ether_addr_64bits(eth_data
->h_dest
, mac_v6_allmcast
)) {
1289 /* Additianally, DAD probes should not be tx-balanced as that
1290 * will lead to false positives for duplicate addresses and
1291 * prevent address configuration from working.
1293 ip6hdr
= ipv6_hdr(skb
);
1294 if (ipv6_addr_any(&ip6hdr
->saddr
)) {
1299 hash_start
= (char *)&(ipv6_hdr(skb
)->daddr
);
1300 hash_size
= sizeof(ipv6_hdr(skb
)->daddr
);
1303 if (ipx_hdr(skb
)->ipx_checksum
!= IPX_NO_CHECKSUM
) {
1304 /* something is wrong with this packet */
1309 if (ipx_hdr(skb
)->ipx_type
!= IPX_TYPE_NCP
) {
1310 /* The only protocol worth balancing in
1311 * this family since it has an "ARP" like
1318 hash_start
= (char*)eth_data
->h_dest
;
1319 hash_size
= ETH_ALEN
;
1323 if (bond_info
->rlb_enabled
) {
1324 tx_slave
= rlb_arp_xmit(skb
, bond
);
1332 if (do_tx_balance
) {
1333 hash_index
= _simple_hash(hash_start
, hash_size
);
1334 tx_slave
= tlb_choose_channel(bond
, hash_index
, skb
->len
);
1338 /* unbalanced or unassigned, send through primary */
1339 tx_slave
= bond
->curr_active_slave
;
1340 bond_info
->unbalanced_load
+= skb
->len
;
1343 if (tx_slave
&& SLAVE_IS_OK(tx_slave
)) {
1344 if (tx_slave
!= bond
->curr_active_slave
) {
1345 memcpy(eth_data
->h_source
,
1346 tx_slave
->dev
->dev_addr
,
1350 res
= bond_dev_queue_xmit(bond
, skb
, tx_slave
->dev
);
1353 tlb_clear_slave(bond
, tx_slave
, 0);
1359 /* no suitable interface, frame not sent */
1362 read_unlock(&bond
->curr_slave_lock
);
1363 read_unlock(&bond
->lock
);
1364 return NETDEV_TX_OK
;
1367 void bond_alb_monitor(struct work_struct
*work
)
1369 struct bonding
*bond
= container_of(work
, struct bonding
,
1371 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1372 struct slave
*slave
;
1375 read_lock(&bond
->lock
);
1377 if (bond
->kill_timers
) {
1381 if (bond
->slave_cnt
== 0) {
1382 bond_info
->tx_rebalance_counter
= 0;
1383 bond_info
->lp_counter
= 0;
1387 bond_info
->tx_rebalance_counter
++;
1388 bond_info
->lp_counter
++;
1390 /* send learning packets */
1391 if (bond_info
->lp_counter
>= BOND_ALB_LP_TICKS
) {
1392 /* change of curr_active_slave involves swapping of mac addresses.
1393 * in order to avoid this swapping from happening while
1394 * sending the learning packets, the curr_slave_lock must be held for
1397 read_lock(&bond
->curr_slave_lock
);
1399 bond_for_each_slave(bond
, slave
, i
) {
1400 alb_send_learning_packets(slave
, slave
->dev
->dev_addr
);
1403 read_unlock(&bond
->curr_slave_lock
);
1405 bond_info
->lp_counter
= 0;
1408 /* rebalance tx traffic */
1409 if (bond_info
->tx_rebalance_counter
>= BOND_TLB_REBALANCE_TICKS
) {
1411 read_lock(&bond
->curr_slave_lock
);
1413 bond_for_each_slave(bond
, slave
, i
) {
1414 tlb_clear_slave(bond
, slave
, 1);
1415 if (slave
== bond
->curr_active_slave
) {
1416 SLAVE_TLB_INFO(slave
).load
=
1417 bond_info
->unbalanced_load
/
1418 BOND_TLB_REBALANCE_INTERVAL
;
1419 bond_info
->unbalanced_load
= 0;
1423 read_unlock(&bond
->curr_slave_lock
);
1425 bond_info
->tx_rebalance_counter
= 0;
1428 /* handle rlb stuff */
1429 if (bond_info
->rlb_enabled
) {
1430 if (bond_info
->primary_is_promisc
&&
1431 (++bond_info
->rlb_promisc_timeout_counter
>= RLB_PROMISC_TIMEOUT
)) {
1434 * dev_set_promiscuity requires rtnl and
1437 read_unlock(&bond
->lock
);
1440 bond_info
->rlb_promisc_timeout_counter
= 0;
1442 /* If the primary was set to promiscuous mode
1443 * because a slave was disabled then
1444 * it can now leave promiscuous mode.
1446 dev_set_promiscuity(bond
->curr_active_slave
->dev
, -1);
1447 bond_info
->primary_is_promisc
= 0;
1450 read_lock(&bond
->lock
);
1453 if (bond_info
->rlb_rebalance
) {
1454 bond_info
->rlb_rebalance
= 0;
1455 rlb_rebalance(bond
);
1458 /* check if clients need updating */
1459 if (bond_info
->rx_ntt
) {
1460 if (bond_info
->rlb_update_delay_counter
) {
1461 --bond_info
->rlb_update_delay_counter
;
1463 rlb_update_rx_clients(bond
);
1464 if (bond_info
->rlb_update_retry_counter
) {
1465 --bond_info
->rlb_update_retry_counter
;
1467 bond_info
->rx_ntt
= 0;
1474 queue_delayed_work(bond
->wq
, &bond
->alb_work
, alb_delta_in_ticks
);
1476 read_unlock(&bond
->lock
);
1479 /* assumption: called before the slave is attached to the bond
1480 * and not locked by the bond lock
1482 int bond_alb_init_slave(struct bonding
*bond
, struct slave
*slave
)
1486 res
= alb_set_slave_mac_addr(slave
, slave
->perm_hwaddr
,
1487 bond
->alb_info
.rlb_enabled
);
1492 /* caller must hold the bond lock for write since the mac addresses
1493 * are compared and may be swapped.
1495 read_lock(&bond
->lock
);
1497 res
= alb_handle_addr_collision_on_attach(bond
, slave
);
1499 read_unlock(&bond
->lock
);
1505 tlb_init_slave(slave
);
1507 /* order a rebalance ASAP */
1508 bond
->alb_info
.tx_rebalance_counter
= BOND_TLB_REBALANCE_TICKS
;
1510 if (bond
->alb_info
.rlb_enabled
) {
1511 bond
->alb_info
.rlb_rebalance
= 1;
1518 * Remove slave from tlb and rlb hash tables, and fix up MAC addresses
1521 * Caller must hold RTNL and no other locks
1523 void bond_alb_deinit_slave(struct bonding
*bond
, struct slave
*slave
)
1525 if (bond
->slave_cnt
> 1) {
1526 alb_change_hw_addr_on_detach(bond
, slave
);
1529 tlb_clear_slave(bond
, slave
, 0);
1531 if (bond
->alb_info
.rlb_enabled
) {
1532 bond
->alb_info
.next_rx_slave
= NULL
;
1533 rlb_clear_slave(bond
, slave
);
1537 /* Caller must hold bond lock for read */
1538 void bond_alb_handle_link_change(struct bonding
*bond
, struct slave
*slave
, char link
)
1540 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1542 if (link
== BOND_LINK_DOWN
) {
1543 tlb_clear_slave(bond
, slave
, 0);
1544 if (bond
->alb_info
.rlb_enabled
) {
1545 rlb_clear_slave(bond
, slave
);
1547 } else if (link
== BOND_LINK_UP
) {
1548 /* order a rebalance ASAP */
1549 bond_info
->tx_rebalance_counter
= BOND_TLB_REBALANCE_TICKS
;
1550 if (bond
->alb_info
.rlb_enabled
) {
1551 bond
->alb_info
.rlb_rebalance
= 1;
1552 /* If the updelay module parameter is smaller than the
1553 * forwarding delay of the switch the rebalance will
1554 * not work because the rebalance arp replies will
1555 * not be forwarded to the clients..
1562 * bond_alb_handle_active_change - assign new curr_active_slave
1563 * @bond: our bonding struct
1564 * @new_slave: new slave to assign
1566 * Set the bond->curr_active_slave to @new_slave and handle
1567 * mac address swapping and promiscuity changes as needed.
1569 * If new_slave is NULL, caller must hold curr_slave_lock or
1570 * bond->lock for write.
1572 * If new_slave is not NULL, caller must hold RTNL, bond->lock for
1573 * read and curr_slave_lock for write. Processing here may sleep, so
1574 * no other locks may be held.
1576 void bond_alb_handle_active_change(struct bonding
*bond
, struct slave
*new_slave
)
1577 __releases(&bond
->curr_slave_lock
)
1578 __releases(&bond
->lock
)
1579 __acquires(&bond
->lock
)
1580 __acquires(&bond
->curr_slave_lock
)
1582 struct slave
*swap_slave
;
1585 if (bond
->curr_active_slave
== new_slave
) {
1589 if (bond
->curr_active_slave
&& bond
->alb_info
.primary_is_promisc
) {
1590 dev_set_promiscuity(bond
->curr_active_slave
->dev
, -1);
1591 bond
->alb_info
.primary_is_promisc
= 0;
1592 bond
->alb_info
.rlb_promisc_timeout_counter
= 0;
1595 swap_slave
= bond
->curr_active_slave
;
1596 bond
->curr_active_slave
= new_slave
;
1598 if (!new_slave
|| (bond
->slave_cnt
== 0)) {
1602 /* set the new curr_active_slave to the bonds mac address
1603 * i.e. swap mac addresses of old curr_active_slave and new curr_active_slave
1606 struct slave
*tmp_slave
;
1607 /* find slave that is holding the bond's mac address */
1608 bond_for_each_slave(bond
, tmp_slave
, i
) {
1609 if (!compare_ether_addr_64bits(tmp_slave
->dev
->dev_addr
,
1610 bond
->dev
->dev_addr
)) {
1611 swap_slave
= tmp_slave
;
1618 * Arrange for swap_slave and new_slave to temporarily be
1619 * ignored so we can mess with their MAC addresses without
1620 * fear of interference from transmit activity.
1623 tlb_clear_slave(bond
, swap_slave
, 1);
1625 tlb_clear_slave(bond
, new_slave
, 1);
1627 write_unlock_bh(&bond
->curr_slave_lock
);
1628 read_unlock(&bond
->lock
);
1632 /* curr_active_slave must be set before calling alb_swap_mac_addr */
1634 /* swap mac address */
1635 alb_swap_mac_addr(bond
, swap_slave
, new_slave
);
1637 /* set the new_slave to the bond mac address */
1638 alb_set_slave_mac_addr(new_slave
, bond
->dev
->dev_addr
,
1639 bond
->alb_info
.rlb_enabled
);
1643 alb_fasten_mac_swap(bond
, swap_slave
, new_slave
);
1644 read_lock(&bond
->lock
);
1646 read_lock(&bond
->lock
);
1647 alb_send_learning_packets(new_slave
, bond
->dev
->dev_addr
);
1650 write_lock_bh(&bond
->curr_slave_lock
);
1656 int bond_alb_set_mac_address(struct net_device
*bond_dev
, void *addr
)
1657 __acquires(&bond
->lock
)
1658 __releases(&bond
->lock
)
1660 struct bonding
*bond
= netdev_priv(bond_dev
);
1661 struct sockaddr
*sa
= addr
;
1662 struct slave
*slave
, *swap_slave
;
1666 if (!is_valid_ether_addr(sa
->sa_data
)) {
1667 return -EADDRNOTAVAIL
;
1670 res
= alb_set_mac_address(bond
, addr
);
1675 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
1677 /* If there is no curr_active_slave there is nothing else to do.
1678 * Otherwise we'll need to pass the new address to it and handle
1681 if (!bond
->curr_active_slave
) {
1687 bond_for_each_slave(bond
, slave
, i
) {
1688 if (!compare_ether_addr_64bits(slave
->dev
->dev_addr
,
1689 bond_dev
->dev_addr
)) {
1696 alb_swap_mac_addr(bond
, swap_slave
, bond
->curr_active_slave
);
1697 alb_fasten_mac_swap(bond
, swap_slave
, bond
->curr_active_slave
);
1699 alb_set_slave_mac_addr(bond
->curr_active_slave
, bond_dev
->dev_addr
,
1700 bond
->alb_info
.rlb_enabled
);
1702 read_lock(&bond
->lock
);
1703 alb_send_learning_packets(bond
->curr_active_slave
, bond_dev
->dev_addr
);
1704 if (bond
->alb_info
.rlb_enabled
) {
1705 /* inform clients mac address has changed */
1706 rlb_req_update_slave_clients(bond
, bond
->curr_active_slave
);
1708 read_unlock(&bond
->lock
);
1714 void bond_alb_clear_vlan(struct bonding
*bond
, unsigned short vlan_id
)
1716 if (bond
->alb_info
.current_alb_vlan
&&
1717 (bond
->alb_info
.current_alb_vlan
->vlan_id
== vlan_id
)) {
1718 bond
->alb_info
.current_alb_vlan
= NULL
;
1721 if (bond
->alb_info
.rlb_enabled
) {
1722 rlb_clear_vlan(bond
, vlan_id
);