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 BONDING_DEBUG 1
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>
41 #include <asm/byteorder.h>
46 #define ALB_TIMER_TICKS_PER_SEC 10 /* should be a divisor of HZ */
47 #define BOND_TLB_REBALANCE_INTERVAL 10 /* In seconds, periodic re-balancing.
48 * Used for division - never set
51 #define BOND_ALB_LP_INTERVAL 1 /* In seconds, periodic send of
52 * learning packets to the switch
55 #define BOND_TLB_REBALANCE_TICKS (BOND_TLB_REBALANCE_INTERVAL \
56 * ALB_TIMER_TICKS_PER_SEC)
58 #define BOND_ALB_LP_TICKS (BOND_ALB_LP_INTERVAL \
59 * ALB_TIMER_TICKS_PER_SEC)
61 #define TLB_HASH_TABLE_SIZE 256 /* The size of the clients hash table.
62 * Note that this value MUST NOT be smaller
63 * because the key hash table is BYTE wide !
67 #define TLB_NULL_INDEX 0xffffffff
68 #define MAX_LP_BURST 3
71 #define RLB_HASH_TABLE_SIZE 256
72 #define RLB_NULL_INDEX 0xffffffff
73 #define RLB_UPDATE_DELAY 2*ALB_TIMER_TICKS_PER_SEC /* 2 seconds */
74 #define RLB_ARP_BURST_SIZE 2
75 #define RLB_UPDATE_RETRY 3 /* 3-ticks - must be smaller than the rlb
76 * rebalance interval (5 min).
78 /* RLB_PROMISC_TIMEOUT = 10 sec equals the time that the current slave is
79 * promiscuous after failover
81 #define RLB_PROMISC_TIMEOUT 10*ALB_TIMER_TICKS_PER_SEC
83 static const u8 mac_bcast
[ETH_ALEN
] = {0xff,0xff,0xff,0xff,0xff,0xff};
84 static const int alb_delta_in_ticks
= HZ
/ ALB_TIMER_TICKS_PER_SEC
;
91 u8 padding
[ETH_ZLEN
- ETH_HLEN
];
100 u8 mac_src
[ETH_ALEN
]; /* sender hardware address */
101 u32 ip_src
; /* sender IP address */
102 u8 mac_dst
[ETH_ALEN
]; /* target hardware address */
103 u32 ip_dst
; /* target IP address */
107 /* Forward declaration */
108 static void alb_send_learning_packets(struct slave
*slave
, u8 mac_addr
[]);
110 static inline u8
_simple_hash(u8
*hash_start
, int hash_size
)
115 for (i
= 0; i
< hash_size
; i
++) {
116 hash
^= hash_start
[i
];
122 /*********************** tlb specific functions ***************************/
124 static inline void _lock_tx_hashtbl(struct bonding
*bond
)
126 spin_lock(&(BOND_ALB_INFO(bond
).tx_hashtbl_lock
));
129 static inline void _unlock_tx_hashtbl(struct bonding
*bond
)
131 spin_unlock(&(BOND_ALB_INFO(bond
).tx_hashtbl_lock
));
134 /* Caller must hold tx_hashtbl lock */
135 static inline void tlb_init_table_entry(struct tlb_client_info
*entry
, int save_load
)
138 entry
->load_history
= 1 + entry
->tx_bytes
/
139 BOND_TLB_REBALANCE_INTERVAL
;
143 entry
->tx_slave
= NULL
;
144 entry
->next
= TLB_NULL_INDEX
;
145 entry
->prev
= TLB_NULL_INDEX
;
148 static inline void tlb_init_slave(struct slave
*slave
)
150 SLAVE_TLB_INFO(slave
).load
= 0;
151 SLAVE_TLB_INFO(slave
).head
= TLB_NULL_INDEX
;
154 /* Caller must hold bond lock for read */
155 static void tlb_clear_slave(struct bonding
*bond
, struct slave
*slave
, int save_load
)
157 struct tlb_client_info
*tx_hash_table
;
160 _lock_tx_hashtbl(bond
);
162 /* clear slave from tx_hashtbl */
163 tx_hash_table
= BOND_ALB_INFO(bond
).tx_hashtbl
;
165 index
= SLAVE_TLB_INFO(slave
).head
;
166 while (index
!= TLB_NULL_INDEX
) {
167 u32 next_index
= tx_hash_table
[index
].next
;
168 tlb_init_table_entry(&tx_hash_table
[index
], save_load
);
172 tlb_init_slave(slave
);
174 _unlock_tx_hashtbl(bond
);
177 /* Must be called before starting the monitor timer */
178 static int tlb_initialize(struct bonding
*bond
)
180 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
181 int size
= TLB_HASH_TABLE_SIZE
* sizeof(struct tlb_client_info
);
182 struct tlb_client_info
*new_hashtbl
;
185 spin_lock_init(&(bond_info
->tx_hashtbl_lock
));
187 new_hashtbl
= kzalloc(size
, GFP_KERNEL
);
189 printk(KERN_ERR DRV_NAME
190 ": %s: Error: Failed to allocate TLB hash table\n",
194 _lock_tx_hashtbl(bond
);
196 bond_info
->tx_hashtbl
= new_hashtbl
;
198 for (i
= 0; i
< TLB_HASH_TABLE_SIZE
; i
++) {
199 tlb_init_table_entry(&bond_info
->tx_hashtbl
[i
], 1);
202 _unlock_tx_hashtbl(bond
);
207 /* Must be called only after all slaves have been released */
208 static void tlb_deinitialize(struct bonding
*bond
)
210 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
212 _lock_tx_hashtbl(bond
);
214 kfree(bond_info
->tx_hashtbl
);
215 bond_info
->tx_hashtbl
= NULL
;
217 _unlock_tx_hashtbl(bond
);
220 /* Caller must hold bond lock for read */
221 static struct slave
*tlb_get_least_loaded_slave(struct bonding
*bond
)
223 struct slave
*slave
, *least_loaded
;
227 /* Find the first enabled slave */
228 bond_for_each_slave(bond
, slave
, i
) {
229 if (SLAVE_IS_OK(slave
)) {
239 least_loaded
= slave
;
240 max_gap
= (s64
)(slave
->speed
<< 20) - /* Convert to Megabit per sec */
241 (s64
)(SLAVE_TLB_INFO(slave
).load
<< 3); /* Bytes to bits */
243 /* Find the slave with the largest gap */
244 bond_for_each_slave_from(bond
, slave
, i
, least_loaded
) {
245 if (SLAVE_IS_OK(slave
)) {
246 s64 gap
= (s64
)(slave
->speed
<< 20) -
247 (s64
)(SLAVE_TLB_INFO(slave
).load
<< 3);
249 least_loaded
= slave
;
258 /* Caller must hold bond lock for read */
259 static struct slave
*tlb_choose_channel(struct bonding
*bond
, u32 hash_index
, u32 skb_len
)
261 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
262 struct tlb_client_info
*hash_table
;
263 struct slave
*assigned_slave
;
265 _lock_tx_hashtbl(bond
);
267 hash_table
= bond_info
->tx_hashtbl
;
268 assigned_slave
= hash_table
[hash_index
].tx_slave
;
269 if (!assigned_slave
) {
270 assigned_slave
= tlb_get_least_loaded_slave(bond
);
272 if (assigned_slave
) {
273 struct tlb_slave_info
*slave_info
=
274 &(SLAVE_TLB_INFO(assigned_slave
));
275 u32 next_index
= slave_info
->head
;
277 hash_table
[hash_index
].tx_slave
= assigned_slave
;
278 hash_table
[hash_index
].next
= next_index
;
279 hash_table
[hash_index
].prev
= TLB_NULL_INDEX
;
281 if (next_index
!= TLB_NULL_INDEX
) {
282 hash_table
[next_index
].prev
= hash_index
;
285 slave_info
->head
= hash_index
;
287 hash_table
[hash_index
].load_history
;
291 if (assigned_slave
) {
292 hash_table
[hash_index
].tx_bytes
+= skb_len
;
295 _unlock_tx_hashtbl(bond
);
297 return assigned_slave
;
300 /*********************** rlb specific functions ***************************/
301 static inline void _lock_rx_hashtbl(struct bonding
*bond
)
303 spin_lock(&(BOND_ALB_INFO(bond
).rx_hashtbl_lock
));
306 static inline void _unlock_rx_hashtbl(struct bonding
*bond
)
308 spin_unlock(&(BOND_ALB_INFO(bond
).rx_hashtbl_lock
));
311 /* when an ARP REPLY is received from a client update its info
314 static void rlb_update_entry_from_arp(struct bonding
*bond
, struct arp_pkt
*arp
)
316 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
317 struct rlb_client_info
*client_info
;
320 _lock_rx_hashtbl(bond
);
322 hash_index
= _simple_hash((u8
*)&(arp
->ip_src
), sizeof(arp
->ip_src
));
323 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
325 if ((client_info
->assigned
) &&
326 (client_info
->ip_src
== arp
->ip_dst
) &&
327 (client_info
->ip_dst
== arp
->ip_src
)) {
328 /* update the clients MAC address */
329 memcpy(client_info
->mac_dst
, arp
->mac_src
, ETH_ALEN
);
330 client_info
->ntt
= 1;
331 bond_info
->rx_ntt
= 1;
334 _unlock_rx_hashtbl(bond
);
337 static int rlb_arp_recv(struct sk_buff
*skb
, struct net_device
*bond_dev
, struct packet_type
*ptype
, struct net_device
*orig_dev
)
339 struct bonding
*bond
= bond_dev
->priv
;
340 struct arp_pkt
*arp
= (struct arp_pkt
*)skb
->data
;
341 int res
= NET_RX_DROP
;
343 if (!(bond_dev
->flags
& IFF_MASTER
))
347 dprintk("Packet has no ARP data\n");
351 if (skb
->len
< sizeof(struct arp_pkt
)) {
352 dprintk("Packet is too small to be an ARP\n");
356 if (arp
->op_code
== htons(ARPOP_REPLY
)) {
357 /* update rx hash table for this ARP */
358 rlb_update_entry_from_arp(bond
, arp
);
359 dprintk("Server received an ARP Reply from client\n");
362 res
= NET_RX_SUCCESS
;
370 /* Caller must hold bond lock for read */
371 static struct slave
*rlb_next_rx_slave(struct bonding
*bond
)
373 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
374 struct slave
*rx_slave
, *slave
, *start_at
;
377 if (bond_info
->next_rx_slave
) {
378 start_at
= bond_info
->next_rx_slave
;
380 start_at
= bond
->first_slave
;
385 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
386 if (SLAVE_IS_OK(slave
)) {
389 } else if (slave
->speed
> rx_slave
->speed
) {
396 bond_info
->next_rx_slave
= rx_slave
->next
;
402 /* teach the switch the mac of a disabled slave
403 * on the primary for fault tolerance
405 * Caller must hold bond->curr_slave_lock for write or bond lock for write
407 static void rlb_teach_disabled_mac_on_primary(struct bonding
*bond
, u8 addr
[])
409 if (!bond
->curr_active_slave
) {
413 if (!bond
->alb_info
.primary_is_promisc
) {
414 bond
->alb_info
.primary_is_promisc
= 1;
415 dev_set_promiscuity(bond
->curr_active_slave
->dev
, 1);
418 bond
->alb_info
.rlb_promisc_timeout_counter
= 0;
420 alb_send_learning_packets(bond
->curr_active_slave
, addr
);
423 /* slave being removed should not be active at this point
425 * Caller must hold bond lock for read
427 static void rlb_clear_slave(struct bonding
*bond
, struct slave
*slave
)
429 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
430 struct rlb_client_info
*rx_hash_table
;
431 u32 index
, next_index
;
433 /* clear slave from rx_hashtbl */
434 _lock_rx_hashtbl(bond
);
436 rx_hash_table
= bond_info
->rx_hashtbl
;
437 index
= bond_info
->rx_hashtbl_head
;
438 for (; index
!= RLB_NULL_INDEX
; index
= next_index
) {
439 next_index
= rx_hash_table
[index
].next
;
440 if (rx_hash_table
[index
].slave
== slave
) {
441 struct slave
*assigned_slave
= rlb_next_rx_slave(bond
);
443 if (assigned_slave
) {
444 rx_hash_table
[index
].slave
= assigned_slave
;
445 if (memcmp(rx_hash_table
[index
].mac_dst
,
446 mac_bcast
, ETH_ALEN
)) {
447 bond_info
->rx_hashtbl
[index
].ntt
= 1;
448 bond_info
->rx_ntt
= 1;
449 /* A slave has been removed from the
450 * table because it is either disabled
451 * or being released. We must retry the
452 * update to avoid clients from not
453 * being updated & disconnecting when
456 bond_info
->rlb_update_retry_counter
=
459 } else { /* there is no active slave */
460 rx_hash_table
[index
].slave
= NULL
;
465 _unlock_rx_hashtbl(bond
);
467 write_lock(&bond
->curr_slave_lock
);
469 if (slave
!= bond
->curr_active_slave
) {
470 rlb_teach_disabled_mac_on_primary(bond
, slave
->dev
->dev_addr
);
473 write_unlock(&bond
->curr_slave_lock
);
476 static void rlb_update_client(struct rlb_client_info
*client_info
)
480 if (!client_info
->slave
) {
484 for (i
= 0; i
< RLB_ARP_BURST_SIZE
; i
++) {
487 skb
= arp_create(ARPOP_REPLY
, ETH_P_ARP
,
489 client_info
->slave
->dev
,
491 client_info
->mac_dst
,
492 client_info
->slave
->dev
->dev_addr
,
493 client_info
->mac_dst
);
495 printk(KERN_ERR DRV_NAME
496 ": %s: Error: failed to create an ARP packet\n",
497 client_info
->slave
->dev
->master
->name
);
501 skb
->dev
= client_info
->slave
->dev
;
503 if (client_info
->tag
) {
504 skb
= vlan_put_tag(skb
, client_info
->vlan_id
);
506 printk(KERN_ERR DRV_NAME
507 ": %s: Error: failed to insert VLAN tag\n",
508 client_info
->slave
->dev
->master
->name
);
517 /* sends ARP REPLIES that update the clients that need updating */
518 static void rlb_update_rx_clients(struct bonding
*bond
)
520 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
521 struct rlb_client_info
*client_info
;
524 _lock_rx_hashtbl(bond
);
526 hash_index
= bond_info
->rx_hashtbl_head
;
527 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
528 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
529 if (client_info
->ntt
) {
530 rlb_update_client(client_info
);
531 if (bond_info
->rlb_update_retry_counter
== 0) {
532 client_info
->ntt
= 0;
537 /* do not update the entries again untill this counter is zero so that
538 * not to confuse the clients.
540 bond_info
->rlb_update_delay_counter
= RLB_UPDATE_DELAY
;
542 _unlock_rx_hashtbl(bond
);
545 /* The slave was assigned a new mac address - update the clients */
546 static void rlb_req_update_slave_clients(struct bonding
*bond
, struct slave
*slave
)
548 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
549 struct rlb_client_info
*client_info
;
553 _lock_rx_hashtbl(bond
);
555 hash_index
= bond_info
->rx_hashtbl_head
;
556 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
557 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
559 if ((client_info
->slave
== slave
) &&
560 memcmp(client_info
->mac_dst
, mac_bcast
, ETH_ALEN
)) {
561 client_info
->ntt
= 1;
566 // update the team's flag only after the whole iteration
568 bond_info
->rx_ntt
= 1;
570 bond_info
->rlb_update_retry_counter
= RLB_UPDATE_RETRY
;
573 _unlock_rx_hashtbl(bond
);
576 /* mark all clients using src_ip to be updated */
577 static void rlb_req_update_subnet_clients(struct bonding
*bond
, u32 src_ip
)
579 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
580 struct rlb_client_info
*client_info
;
583 _lock_rx_hashtbl(bond
);
585 hash_index
= bond_info
->rx_hashtbl_head
;
586 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
587 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
589 if (!client_info
->slave
) {
590 printk(KERN_ERR DRV_NAME
591 ": %s: Error: found a client with no channel in "
592 "the client's hash table\n",
596 /*update all clients using this src_ip, that are not assigned
597 * to the team's address (curr_active_slave) and have a known
598 * unicast mac address.
600 if ((client_info
->ip_src
== src_ip
) &&
601 memcmp(client_info
->slave
->dev
->dev_addr
,
602 bond
->dev
->dev_addr
, ETH_ALEN
) &&
603 memcmp(client_info
->mac_dst
, mac_bcast
, ETH_ALEN
)) {
604 client_info
->ntt
= 1;
605 bond_info
->rx_ntt
= 1;
609 _unlock_rx_hashtbl(bond
);
612 /* Caller must hold both bond and ptr locks for read */
613 static struct slave
*rlb_choose_channel(struct sk_buff
*skb
, struct bonding
*bond
)
615 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
616 struct arp_pkt
*arp
= (struct arp_pkt
*)skb
->nh
.raw
;
617 struct slave
*assigned_slave
;
618 struct rlb_client_info
*client_info
;
621 _lock_rx_hashtbl(bond
);
623 hash_index
= _simple_hash((u8
*)&arp
->ip_dst
, sizeof(arp
->ip_src
));
624 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
626 if (client_info
->assigned
) {
627 if ((client_info
->ip_src
== arp
->ip_src
) &&
628 (client_info
->ip_dst
== arp
->ip_dst
)) {
629 /* the entry is already assigned to this client */
630 if (memcmp(arp
->mac_dst
, mac_bcast
, ETH_ALEN
)) {
631 /* update mac address from arp */
632 memcpy(client_info
->mac_dst
, arp
->mac_dst
, ETH_ALEN
);
635 assigned_slave
= client_info
->slave
;
636 if (assigned_slave
) {
637 _unlock_rx_hashtbl(bond
);
638 return assigned_slave
;
641 /* the entry is already assigned to some other client,
642 * move the old client to primary (curr_active_slave) so
643 * that the new client can be assigned to this entry.
645 if (bond
->curr_active_slave
&&
646 client_info
->slave
!= bond
->curr_active_slave
) {
647 client_info
->slave
= bond
->curr_active_slave
;
648 rlb_update_client(client_info
);
652 /* assign a new slave */
653 assigned_slave
= rlb_next_rx_slave(bond
);
655 if (assigned_slave
) {
656 client_info
->ip_src
= arp
->ip_src
;
657 client_info
->ip_dst
= arp
->ip_dst
;
658 /* arp->mac_dst is broadcast for arp reqeusts.
659 * will be updated with clients actual unicast mac address
660 * upon receiving an arp reply.
662 memcpy(client_info
->mac_dst
, arp
->mac_dst
, ETH_ALEN
);
663 client_info
->slave
= assigned_slave
;
665 if (memcmp(client_info
->mac_dst
, mac_bcast
, ETH_ALEN
)) {
666 client_info
->ntt
= 1;
667 bond
->alb_info
.rx_ntt
= 1;
669 client_info
->ntt
= 0;
672 if (!list_empty(&bond
->vlan_list
)) {
673 unsigned short vlan_id
;
674 int res
= vlan_get_tag(skb
, &vlan_id
);
676 client_info
->tag
= 1;
677 client_info
->vlan_id
= vlan_id
;
681 if (!client_info
->assigned
) {
682 u32 prev_tbl_head
= bond_info
->rx_hashtbl_head
;
683 bond_info
->rx_hashtbl_head
= hash_index
;
684 client_info
->next
= prev_tbl_head
;
685 if (prev_tbl_head
!= RLB_NULL_INDEX
) {
686 bond_info
->rx_hashtbl
[prev_tbl_head
].prev
=
689 client_info
->assigned
= 1;
693 _unlock_rx_hashtbl(bond
);
695 return assigned_slave
;
698 /* chooses (and returns) transmit channel for arp reply
699 * does not choose channel for other arp types since they are
700 * sent on the curr_active_slave
702 static struct slave
*rlb_arp_xmit(struct sk_buff
*skb
, struct bonding
*bond
)
704 struct arp_pkt
*arp
= (struct arp_pkt
*)skb
->nh
.raw
;
705 struct slave
*tx_slave
= NULL
;
707 if (arp
->op_code
== __constant_htons(ARPOP_REPLY
)) {
708 /* the arp must be sent on the selected
711 tx_slave
= rlb_choose_channel(skb
, bond
);
713 memcpy(arp
->mac_src
,tx_slave
->dev
->dev_addr
, ETH_ALEN
);
715 dprintk("Server sent ARP Reply packet\n");
716 } else if (arp
->op_code
== __constant_htons(ARPOP_REQUEST
)) {
717 /* Create an entry in the rx_hashtbl for this client as a
719 * When the arp reply is received the entry will be updated
720 * with the correct unicast address of the client.
722 rlb_choose_channel(skb
, bond
);
724 /* The ARP relpy packets must be delayed so that
725 * they can cancel out the influence of the ARP request.
727 bond
->alb_info
.rlb_update_delay_counter
= RLB_UPDATE_DELAY
;
729 /* arp requests are broadcast and are sent on the primary
730 * the arp request will collapse all clients on the subnet to
731 * the primary slave. We must register these clients to be
732 * updated with their assigned mac.
734 rlb_req_update_subnet_clients(bond
, arp
->ip_src
);
735 dprintk("Server sent ARP Request packet\n");
741 /* Caller must hold bond lock for read */
742 static void rlb_rebalance(struct bonding
*bond
)
744 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
745 struct slave
*assigned_slave
;
746 struct rlb_client_info
*client_info
;
750 _lock_rx_hashtbl(bond
);
753 hash_index
= bond_info
->rx_hashtbl_head
;
754 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
755 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
756 assigned_slave
= rlb_next_rx_slave(bond
);
757 if (assigned_slave
&& (client_info
->slave
!= assigned_slave
)) {
758 client_info
->slave
= assigned_slave
;
759 client_info
->ntt
= 1;
764 /* update the team's flag only after the whole iteration */
766 bond_info
->rx_ntt
= 1;
768 _unlock_rx_hashtbl(bond
);
771 /* Caller must hold rx_hashtbl lock */
772 static void rlb_init_table_entry(struct rlb_client_info
*entry
)
774 memset(entry
, 0, sizeof(struct rlb_client_info
));
775 entry
->next
= RLB_NULL_INDEX
;
776 entry
->prev
= RLB_NULL_INDEX
;
779 static int rlb_initialize(struct bonding
*bond
)
781 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
782 struct packet_type
*pk_type
= &(BOND_ALB_INFO(bond
).rlb_pkt_type
);
783 struct rlb_client_info
*new_hashtbl
;
784 int size
= RLB_HASH_TABLE_SIZE
* sizeof(struct rlb_client_info
);
787 spin_lock_init(&(bond_info
->rx_hashtbl_lock
));
789 new_hashtbl
= kmalloc(size
, GFP_KERNEL
);
791 printk(KERN_ERR DRV_NAME
792 ": %s: Error: Failed to allocate RLB hash table\n",
796 _lock_rx_hashtbl(bond
);
798 bond_info
->rx_hashtbl
= new_hashtbl
;
800 bond_info
->rx_hashtbl_head
= RLB_NULL_INDEX
;
802 for (i
= 0; i
< RLB_HASH_TABLE_SIZE
; i
++) {
803 rlb_init_table_entry(bond_info
->rx_hashtbl
+ i
);
806 _unlock_rx_hashtbl(bond
);
808 /*initialize packet type*/
809 pk_type
->type
= __constant_htons(ETH_P_ARP
);
810 pk_type
->dev
= bond
->dev
;
811 pk_type
->func
= rlb_arp_recv
;
813 /* register to receive ARPs */
814 dev_add_pack(pk_type
);
819 static void rlb_deinitialize(struct bonding
*bond
)
821 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
823 dev_remove_pack(&(bond_info
->rlb_pkt_type
));
825 _lock_rx_hashtbl(bond
);
827 kfree(bond_info
->rx_hashtbl
);
828 bond_info
->rx_hashtbl
= NULL
;
829 bond_info
->rx_hashtbl_head
= RLB_NULL_INDEX
;
831 _unlock_rx_hashtbl(bond
);
834 static void rlb_clear_vlan(struct bonding
*bond
, unsigned short vlan_id
)
836 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
839 _lock_rx_hashtbl(bond
);
841 curr_index
= bond_info
->rx_hashtbl_head
;
842 while (curr_index
!= RLB_NULL_INDEX
) {
843 struct rlb_client_info
*curr
= &(bond_info
->rx_hashtbl
[curr_index
]);
844 u32 next_index
= bond_info
->rx_hashtbl
[curr_index
].next
;
845 u32 prev_index
= bond_info
->rx_hashtbl
[curr_index
].prev
;
847 if (curr
->tag
&& (curr
->vlan_id
== vlan_id
)) {
848 if (curr_index
== bond_info
->rx_hashtbl_head
) {
849 bond_info
->rx_hashtbl_head
= next_index
;
851 if (prev_index
!= RLB_NULL_INDEX
) {
852 bond_info
->rx_hashtbl
[prev_index
].next
= next_index
;
854 if (next_index
!= RLB_NULL_INDEX
) {
855 bond_info
->rx_hashtbl
[next_index
].prev
= prev_index
;
858 rlb_init_table_entry(curr
);
861 curr_index
= next_index
;
864 _unlock_rx_hashtbl(bond
);
867 /*********************** tlb/rlb shared functions *********************/
869 static void alb_send_learning_packets(struct slave
*slave
, u8 mac_addr
[])
871 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
872 struct learning_pkt pkt
;
873 int size
= sizeof(struct learning_pkt
);
876 memset(&pkt
, 0, size
);
877 memcpy(pkt
.mac_dst
, mac_addr
, ETH_ALEN
);
878 memcpy(pkt
.mac_src
, mac_addr
, ETH_ALEN
);
879 pkt
.type
= __constant_htons(ETH_P_LOOP
);
881 for (i
= 0; i
< MAX_LP_BURST
; i
++) {
885 skb
= dev_alloc_skb(size
);
890 data
= skb_put(skb
, size
);
891 memcpy(data
, &pkt
, size
);
894 skb
->nh
.raw
= data
+ ETH_HLEN
;
895 skb
->protocol
= pkt
.type
;
896 skb
->priority
= TC_PRIO_CONTROL
;
897 skb
->dev
= slave
->dev
;
899 if (!list_empty(&bond
->vlan_list
)) {
900 struct vlan_entry
*vlan
;
902 vlan
= bond_next_vlan(bond
,
903 bond
->alb_info
.current_alb_vlan
);
905 bond
->alb_info
.current_alb_vlan
= vlan
;
911 skb
= vlan_put_tag(skb
, vlan
->vlan_id
);
913 printk(KERN_ERR DRV_NAME
914 ": %s: Error: failed to insert VLAN tag\n",
924 /* hw is a boolean parameter that determines whether we should try and
925 * set the hw address of the device as well as the hw address of the
928 static int alb_set_slave_mac_addr(struct slave
*slave
, u8 addr
[], int hw
)
930 struct net_device
*dev
= slave
->dev
;
931 struct sockaddr s_addr
;
934 memcpy(dev
->dev_addr
, addr
, dev
->addr_len
);
938 /* for rlb each slave must have a unique hw mac addresses so that */
939 /* each slave will receive packets destined to a different mac */
940 memcpy(s_addr
.sa_data
, addr
, dev
->addr_len
);
941 s_addr
.sa_family
= dev
->type
;
942 if (dev_set_mac_address(dev
, &s_addr
)) {
943 printk(KERN_ERR DRV_NAME
944 ": %s: Error: dev_set_mac_address of dev %s failed! ALB "
945 "mode requires that the base driver support setting "
946 "the hw address also when the network device's "
947 "interface is open\n",
948 dev
->master
->name
, dev
->name
);
954 /* Caller must hold bond lock for write or curr_slave_lock for write*/
955 static void alb_swap_mac_addr(struct bonding
*bond
, struct slave
*slave1
, struct slave
*slave2
)
957 struct slave
*disabled_slave
= NULL
;
958 u8 tmp_mac_addr
[ETH_ALEN
];
959 int slaves_state_differ
;
961 slaves_state_differ
= (SLAVE_IS_OK(slave1
) != SLAVE_IS_OK(slave2
));
963 memcpy(tmp_mac_addr
, slave1
->dev
->dev_addr
, ETH_ALEN
);
964 alb_set_slave_mac_addr(slave1
, slave2
->dev
->dev_addr
, bond
->alb_info
.rlb_enabled
);
965 alb_set_slave_mac_addr(slave2
, tmp_mac_addr
, bond
->alb_info
.rlb_enabled
);
967 /* fasten the change in the switch */
968 if (SLAVE_IS_OK(slave1
)) {
969 alb_send_learning_packets(slave1
, slave1
->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
, slave1
);
977 disabled_slave
= slave1
;
980 if (SLAVE_IS_OK(slave2
)) {
981 alb_send_learning_packets(slave2
, slave2
->dev
->dev_addr
);
982 if (bond
->alb_info
.rlb_enabled
) {
983 /* inform the clients that the mac address
986 rlb_req_update_slave_clients(bond
, slave2
);
989 disabled_slave
= slave2
;
992 if (bond
->alb_info
.rlb_enabled
&& slaves_state_differ
) {
993 /* A disabled slave was assigned an active mac addr */
994 rlb_teach_disabled_mac_on_primary(bond
,
995 disabled_slave
->dev
->dev_addr
);
1000 * alb_change_hw_addr_on_detach
1001 * @bond: bonding we're working on
1002 * @slave: the slave that was just detached
1004 * We assume that @slave was already detached from the slave list.
1006 * If @slave's permanent hw address is different both from its current
1007 * address and from @bond's address, then somewhere in the bond there's
1008 * a slave that has @slave's permanet address as its current address.
1009 * We'll make sure that that slave no longer uses @slave's permanent address.
1011 * Caller must hold bond lock
1013 static void alb_change_hw_addr_on_detach(struct bonding
*bond
, struct slave
*slave
)
1018 perm_curr_diff
= memcmp(slave
->perm_hwaddr
,
1019 slave
->dev
->dev_addr
,
1021 perm_bond_diff
= memcmp(slave
->perm_hwaddr
,
1022 bond
->dev
->dev_addr
,
1025 if (perm_curr_diff
&& perm_bond_diff
) {
1026 struct slave
*tmp_slave
;
1029 bond_for_each_slave(bond
, tmp_slave
, i
) {
1030 if (!memcmp(slave
->perm_hwaddr
,
1031 tmp_slave
->dev
->dev_addr
,
1039 alb_swap_mac_addr(bond
, slave
, tmp_slave
);
1045 * alb_handle_addr_collision_on_attach
1046 * @bond: bonding we're working on
1047 * @slave: the slave that was just attached
1049 * checks uniqueness of slave's mac address and handles the case the
1050 * new slave uses the bonds mac address.
1052 * If the permanent hw address of @slave is @bond's hw address, we need to
1053 * find a different hw address to give @slave, that isn't in use by any other
1054 * slave in the bond. This address must be, of course, one of the premanent
1055 * addresses of the other slaves.
1057 * We go over the slave list, and for each slave there we compare its
1058 * permanent hw address with the current address of all the other slaves.
1059 * If no match was found, then we've found a slave with a permanent address
1060 * that isn't used by any other slave in the bond, so we can assign it to
1063 * assumption: this function is called before @slave is attached to the
1066 * caller must hold the bond lock for write since the mac addresses are compared
1067 * and may be swapped.
1069 static int alb_handle_addr_collision_on_attach(struct bonding
*bond
, struct slave
*slave
)
1071 struct slave
*tmp_slave1
, *tmp_slave2
, *free_mac_slave
;
1072 struct slave
*has_bond_addr
= bond
->curr_active_slave
;
1073 int i
, j
, found
= 0;
1075 if (bond
->slave_cnt
== 0) {
1076 /* this is the first slave */
1080 /* if slave's mac address differs from bond's mac address
1081 * check uniqueness of slave's mac address against the other
1082 * slaves in the bond.
1084 if (memcmp(slave
->perm_hwaddr
, bond
->dev
->dev_addr
, ETH_ALEN
)) {
1085 bond_for_each_slave(bond
, tmp_slave1
, i
) {
1086 if (!memcmp(tmp_slave1
->dev
->dev_addr
, slave
->dev
->dev_addr
,
1096 /* Try setting slave mac to bond address and fall-through
1097 to code handling that situation below... */
1098 alb_set_slave_mac_addr(slave
, bond
->dev
->dev_addr
,
1099 bond
->alb_info
.rlb_enabled
);
1102 /* The slave's address is equal to the address of the bond.
1103 * Search for a spare address in the bond for this slave.
1105 free_mac_slave
= NULL
;
1107 bond_for_each_slave(bond
, tmp_slave1
, i
) {
1109 bond_for_each_slave(bond
, tmp_slave2
, j
) {
1110 if (!memcmp(tmp_slave1
->perm_hwaddr
,
1111 tmp_slave2
->dev
->dev_addr
,
1119 /* no slave has tmp_slave1's perm addr
1122 free_mac_slave
= tmp_slave1
;
1126 if (!has_bond_addr
) {
1127 if (!memcmp(tmp_slave1
->dev
->dev_addr
,
1128 bond
->dev
->dev_addr
,
1131 has_bond_addr
= tmp_slave1
;
1136 if (free_mac_slave
) {
1137 alb_set_slave_mac_addr(slave
, free_mac_slave
->perm_hwaddr
,
1138 bond
->alb_info
.rlb_enabled
);
1140 printk(KERN_WARNING DRV_NAME
1141 ": %s: Warning: the hw address of slave %s is in use by "
1142 "the bond; giving it the hw address of %s\n",
1143 bond
->dev
->name
, slave
->dev
->name
, free_mac_slave
->dev
->name
);
1145 } else if (has_bond_addr
) {
1146 printk(KERN_ERR DRV_NAME
1147 ": %s: Error: the hw address of slave %s is in use by the "
1148 "bond; couldn't find a slave with a free hw address to "
1149 "give it (this should not have happened)\n",
1150 bond
->dev
->name
, slave
->dev
->name
);
1158 * alb_set_mac_address
1162 * In TLB mode all slaves are configured to the bond's hw address, but set
1163 * their dev_addr field to different addresses (based on their permanent hw
1166 * For each slave, this function sets the interface to the new address and then
1167 * changes its dev_addr field to its previous value.
1169 * Unwinding assumes bond's mac address has not yet changed.
1171 static int alb_set_mac_address(struct bonding
*bond
, void *addr
)
1174 struct slave
*slave
, *stop_at
;
1175 char tmp_addr
[ETH_ALEN
];
1179 if (bond
->alb_info
.rlb_enabled
) {
1183 bond_for_each_slave(bond
, slave
, i
) {
1184 if (slave
->dev
->set_mac_address
== NULL
) {
1189 /* save net_device's current hw address */
1190 memcpy(tmp_addr
, slave
->dev
->dev_addr
, ETH_ALEN
);
1192 res
= dev_set_mac_address(slave
->dev
, addr
);
1194 /* restore net_device's hw address */
1195 memcpy(slave
->dev
->dev_addr
, tmp_addr
, ETH_ALEN
);
1205 memcpy(sa
.sa_data
, bond
->dev
->dev_addr
, bond
->dev
->addr_len
);
1206 sa
.sa_family
= bond
->dev
->type
;
1208 /* unwind from head to the slave that failed */
1210 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
1211 memcpy(tmp_addr
, slave
->dev
->dev_addr
, ETH_ALEN
);
1212 dev_set_mac_address(slave
->dev
, &sa
);
1213 memcpy(slave
->dev
->dev_addr
, tmp_addr
, ETH_ALEN
);
1219 /************************ exported alb funcions ************************/
1221 int bond_alb_initialize(struct bonding
*bond
, int rlb_enabled
)
1225 res
= tlb_initialize(bond
);
1231 bond
->alb_info
.rlb_enabled
= 1;
1232 /* initialize rlb */
1233 res
= rlb_initialize(bond
);
1235 tlb_deinitialize(bond
);
1239 bond
->alb_info
.rlb_enabled
= 0;
1245 void bond_alb_deinitialize(struct bonding
*bond
)
1247 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1249 tlb_deinitialize(bond
);
1251 if (bond_info
->rlb_enabled
) {
1252 rlb_deinitialize(bond
);
1256 int bond_alb_xmit(struct sk_buff
*skb
, struct net_device
*bond_dev
)
1258 struct bonding
*bond
= bond_dev
->priv
;
1259 struct ethhdr
*eth_data
;
1260 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1261 struct slave
*tx_slave
= NULL
;
1262 static const u32 ip_bcast
= 0xffffffff;
1264 int do_tx_balance
= 1;
1266 u8
*hash_start
= NULL
;
1269 skb
->mac
.raw
= (unsigned char *)skb
->data
;
1270 eth_data
= eth_hdr(skb
);
1272 /* make sure that the curr_active_slave and the slaves list do
1273 * not change during tx
1275 read_lock(&bond
->lock
);
1276 read_lock(&bond
->curr_slave_lock
);
1278 if (!BOND_IS_OK(bond
)) {
1282 switch (ntohs(skb
->protocol
)) {
1284 if ((memcmp(eth_data
->h_dest
, mac_bcast
, ETH_ALEN
) == 0) ||
1285 (skb
->nh
.iph
->daddr
== ip_bcast
) ||
1286 (skb
->nh
.iph
->protocol
== IPPROTO_IGMP
)) {
1290 hash_start
= (char*)&(skb
->nh
.iph
->daddr
);
1291 hash_size
= sizeof(skb
->nh
.iph
->daddr
);
1294 if (memcmp(eth_data
->h_dest
, mac_bcast
, ETH_ALEN
) == 0) {
1299 hash_start
= (char*)&(skb
->nh
.ipv6h
->daddr
);
1300 hash_size
= sizeof(skb
->nh
.ipv6h
->daddr
);
1303 if (ipx_hdr(skb
)->ipx_checksum
!=
1304 __constant_htons(IPX_NO_CHECKSUM
)) {
1305 /* something is wrong with this packet */
1310 if (ipx_hdr(skb
)->ipx_type
!= IPX_TYPE_NCP
) {
1311 /* The only protocol worth balancing in
1312 * this family since it has an "ARP" like
1319 hash_start
= (char*)eth_data
->h_dest
;
1320 hash_size
= ETH_ALEN
;
1324 if (bond_info
->rlb_enabled
) {
1325 tx_slave
= rlb_arp_xmit(skb
, bond
);
1333 if (do_tx_balance
) {
1334 hash_index
= _simple_hash(hash_start
, hash_size
);
1335 tx_slave
= tlb_choose_channel(bond
, hash_index
, skb
->len
);
1339 /* unbalanced or unassigned, send through primary */
1340 tx_slave
= bond
->curr_active_slave
;
1341 bond_info
->unbalanced_load
+= skb
->len
;
1344 if (tx_slave
&& SLAVE_IS_OK(tx_slave
)) {
1345 if (tx_slave
!= bond
->curr_active_slave
) {
1346 memcpy(eth_data
->h_source
,
1347 tx_slave
->dev
->dev_addr
,
1351 res
= bond_dev_queue_xmit(bond
, skb
, tx_slave
->dev
);
1354 tlb_clear_slave(bond
, tx_slave
, 0);
1360 /* no suitable interface, frame not sent */
1363 read_unlock(&bond
->curr_slave_lock
);
1364 read_unlock(&bond
->lock
);
1368 void bond_alb_monitor(struct bonding
*bond
)
1370 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1371 struct slave
*slave
;
1374 read_lock(&bond
->lock
);
1376 if (bond
->kill_timers
) {
1380 if (bond
->slave_cnt
== 0) {
1381 bond_info
->tx_rebalance_counter
= 0;
1382 bond_info
->lp_counter
= 0;
1386 bond_info
->tx_rebalance_counter
++;
1387 bond_info
->lp_counter
++;
1389 /* send learning packets */
1390 if (bond_info
->lp_counter
>= BOND_ALB_LP_TICKS
) {
1391 /* change of curr_active_slave involves swapping of mac addresses.
1392 * in order to avoid this swapping from happening while
1393 * sending the learning packets, the curr_slave_lock must be held for
1396 read_lock(&bond
->curr_slave_lock
);
1398 bond_for_each_slave(bond
, slave
, i
) {
1399 alb_send_learning_packets(slave
, slave
->dev
->dev_addr
);
1402 read_unlock(&bond
->curr_slave_lock
);
1404 bond_info
->lp_counter
= 0;
1407 /* rebalance tx traffic */
1408 if (bond_info
->tx_rebalance_counter
>= BOND_TLB_REBALANCE_TICKS
) {
1410 read_lock(&bond
->curr_slave_lock
);
1412 bond_for_each_slave(bond
, slave
, i
) {
1413 tlb_clear_slave(bond
, slave
, 1);
1414 if (slave
== bond
->curr_active_slave
) {
1415 SLAVE_TLB_INFO(slave
).load
=
1416 bond_info
->unbalanced_load
/
1417 BOND_TLB_REBALANCE_INTERVAL
;
1418 bond_info
->unbalanced_load
= 0;
1422 read_unlock(&bond
->curr_slave_lock
);
1424 bond_info
->tx_rebalance_counter
= 0;
1427 /* handle rlb stuff */
1428 if (bond_info
->rlb_enabled
) {
1429 /* the following code changes the promiscuity of the
1430 * the curr_active_slave. It needs to be locked with a
1431 * write lock to protect from other code that also
1432 * sets the promiscuity.
1434 write_lock_bh(&bond
->curr_slave_lock
);
1436 if (bond_info
->primary_is_promisc
&&
1437 (++bond_info
->rlb_promisc_timeout_counter
>= RLB_PROMISC_TIMEOUT
)) {
1439 bond_info
->rlb_promisc_timeout_counter
= 0;
1441 /* If the primary was set to promiscuous mode
1442 * because a slave was disabled then
1443 * it can now leave promiscuous mode.
1445 dev_set_promiscuity(bond
->curr_active_slave
->dev
, -1);
1446 bond_info
->primary_is_promisc
= 0;
1449 write_unlock_bh(&bond
->curr_slave_lock
);
1451 if (bond_info
->rlb_rebalance
) {
1452 bond_info
->rlb_rebalance
= 0;
1453 rlb_rebalance(bond
);
1456 /* check if clients need updating */
1457 if (bond_info
->rx_ntt
) {
1458 if (bond_info
->rlb_update_delay_counter
) {
1459 --bond_info
->rlb_update_delay_counter
;
1461 rlb_update_rx_clients(bond
);
1462 if (bond_info
->rlb_update_retry_counter
) {
1463 --bond_info
->rlb_update_retry_counter
;
1465 bond_info
->rx_ntt
= 0;
1472 mod_timer(&(bond_info
->alb_timer
), jiffies
+ alb_delta_in_ticks
);
1474 read_unlock(&bond
->lock
);
1477 /* assumption: called before the slave is attached to the bond
1478 * and not locked by the bond lock
1480 int bond_alb_init_slave(struct bonding
*bond
, struct slave
*slave
)
1484 res
= alb_set_slave_mac_addr(slave
, slave
->perm_hwaddr
,
1485 bond
->alb_info
.rlb_enabled
);
1490 /* caller must hold the bond lock for write since the mac addresses
1491 * are compared and may be swapped.
1493 write_lock_bh(&bond
->lock
);
1495 res
= alb_handle_addr_collision_on_attach(bond
, slave
);
1497 write_unlock_bh(&bond
->lock
);
1503 tlb_init_slave(slave
);
1505 /* order a rebalance ASAP */
1506 bond
->alb_info
.tx_rebalance_counter
= BOND_TLB_REBALANCE_TICKS
;
1508 if (bond
->alb_info
.rlb_enabled
) {
1509 bond
->alb_info
.rlb_rebalance
= 1;
1515 /* Caller must hold bond lock for write */
1516 void bond_alb_deinit_slave(struct bonding
*bond
, struct slave
*slave
)
1518 if (bond
->slave_cnt
> 1) {
1519 alb_change_hw_addr_on_detach(bond
, slave
);
1522 tlb_clear_slave(bond
, slave
, 0);
1524 if (bond
->alb_info
.rlb_enabled
) {
1525 bond
->alb_info
.next_rx_slave
= NULL
;
1526 rlb_clear_slave(bond
, slave
);
1530 /* Caller must hold bond lock for read */
1531 void bond_alb_handle_link_change(struct bonding
*bond
, struct slave
*slave
, char link
)
1533 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1535 if (link
== BOND_LINK_DOWN
) {
1536 tlb_clear_slave(bond
, slave
, 0);
1537 if (bond
->alb_info
.rlb_enabled
) {
1538 rlb_clear_slave(bond
, slave
);
1540 } else if (link
== BOND_LINK_UP
) {
1541 /* order a rebalance ASAP */
1542 bond_info
->tx_rebalance_counter
= BOND_TLB_REBALANCE_TICKS
;
1543 if (bond
->alb_info
.rlb_enabled
) {
1544 bond
->alb_info
.rlb_rebalance
= 1;
1545 /* If the updelay module parameter is smaller than the
1546 * forwarding delay of the switch the rebalance will
1547 * not work because the rebalance arp replies will
1548 * not be forwarded to the clients..
1555 * bond_alb_handle_active_change - assign new curr_active_slave
1556 * @bond: our bonding struct
1557 * @new_slave: new slave to assign
1559 * Set the bond->curr_active_slave to @new_slave and handle
1560 * mac address swapping and promiscuity changes as needed.
1562 * Caller must hold bond curr_slave_lock for write (or bond lock for write)
1564 void bond_alb_handle_active_change(struct bonding
*bond
, struct slave
*new_slave
)
1566 struct slave
*swap_slave
;
1569 if (bond
->curr_active_slave
== new_slave
) {
1573 if (bond
->curr_active_slave
&& bond
->alb_info
.primary_is_promisc
) {
1574 dev_set_promiscuity(bond
->curr_active_slave
->dev
, -1);
1575 bond
->alb_info
.primary_is_promisc
= 0;
1576 bond
->alb_info
.rlb_promisc_timeout_counter
= 0;
1579 swap_slave
= bond
->curr_active_slave
;
1580 bond
->curr_active_slave
= new_slave
;
1582 if (!new_slave
|| (bond
->slave_cnt
== 0)) {
1586 /* set the new curr_active_slave to the bonds mac address
1587 * i.e. swap mac addresses of old curr_active_slave and new curr_active_slave
1590 struct slave
*tmp_slave
;
1591 /* find slave that is holding the bond's mac address */
1592 bond_for_each_slave(bond
, tmp_slave
, i
) {
1593 if (!memcmp(tmp_slave
->dev
->dev_addr
,
1594 bond
->dev
->dev_addr
, ETH_ALEN
)) {
1595 swap_slave
= tmp_slave
;
1601 /* curr_active_slave must be set before calling alb_swap_mac_addr */
1603 /* swap mac address */
1604 alb_swap_mac_addr(bond
, swap_slave
, new_slave
);
1606 /* set the new_slave to the bond mac address */
1607 alb_set_slave_mac_addr(new_slave
, bond
->dev
->dev_addr
,
1608 bond
->alb_info
.rlb_enabled
);
1609 /* fasten bond mac on new current slave */
1610 alb_send_learning_packets(new_slave
, bond
->dev
->dev_addr
);
1614 int bond_alb_set_mac_address(struct net_device
*bond_dev
, void *addr
)
1616 struct bonding
*bond
= bond_dev
->priv
;
1617 struct sockaddr
*sa
= addr
;
1618 struct slave
*slave
, *swap_slave
;
1622 if (!is_valid_ether_addr(sa
->sa_data
)) {
1623 return -EADDRNOTAVAIL
;
1626 res
= alb_set_mac_address(bond
, addr
);
1631 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
1633 /* If there is no curr_active_slave there is nothing else to do.
1634 * Otherwise we'll need to pass the new address to it and handle
1637 if (!bond
->curr_active_slave
) {
1643 bond_for_each_slave(bond
, slave
, i
) {
1644 if (!memcmp(slave
->dev
->dev_addr
, bond_dev
->dev_addr
, ETH_ALEN
)) {
1651 alb_swap_mac_addr(bond
, swap_slave
, bond
->curr_active_slave
);
1653 alb_set_slave_mac_addr(bond
->curr_active_slave
, bond_dev
->dev_addr
,
1654 bond
->alb_info
.rlb_enabled
);
1656 alb_send_learning_packets(bond
->curr_active_slave
, bond_dev
->dev_addr
);
1657 if (bond
->alb_info
.rlb_enabled
) {
1658 /* inform clients mac address has changed */
1659 rlb_req_update_slave_clients(bond
, bond
->curr_active_slave
);
1666 void bond_alb_clear_vlan(struct bonding
*bond
, unsigned short vlan_id
)
1668 if (bond
->alb_info
.current_alb_vlan
&&
1669 (bond
->alb_info
.current_alb_vlan
->vlan_id
== vlan_id
)) {
1670 bond
->alb_info
.current_alb_vlan
= NULL
;
1673 if (bond
->alb_info
.rlb_enabled
) {
1674 rlb_clear_vlan(bond
, vlan_id
);