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
];
96 __be16 prot_addr_space
;
100 u8 mac_src
[ETH_ALEN
]; /* sender hardware address */
101 __be32 ip_src
; /* sender IP address */
102 u8 mac_dst
[ETH_ALEN
]; /* target hardware address */
103 __be32 ip_dst
; /* target IP address */
107 static inline struct arp_pkt
*arp_pkt(const struct sk_buff
*skb
)
109 return (struct arp_pkt
*)skb_network_header(skb
);
112 /* Forward declaration */
113 static void alb_send_learning_packets(struct slave
*slave
, u8 mac_addr
[]);
115 static inline u8
_simple_hash(const u8
*hash_start
, int hash_size
)
120 for (i
= 0; i
< hash_size
; i
++) {
121 hash
^= hash_start
[i
];
127 /*********************** tlb specific functions ***************************/
129 static inline void _lock_tx_hashtbl(struct bonding
*bond
)
131 spin_lock(&(BOND_ALB_INFO(bond
).tx_hashtbl_lock
));
134 static inline void _unlock_tx_hashtbl(struct bonding
*bond
)
136 spin_unlock(&(BOND_ALB_INFO(bond
).tx_hashtbl_lock
));
139 /* Caller must hold tx_hashtbl lock */
140 static inline void tlb_init_table_entry(struct tlb_client_info
*entry
, int save_load
)
143 entry
->load_history
= 1 + entry
->tx_bytes
/
144 BOND_TLB_REBALANCE_INTERVAL
;
148 entry
->tx_slave
= NULL
;
149 entry
->next
= TLB_NULL_INDEX
;
150 entry
->prev
= TLB_NULL_INDEX
;
153 static inline void tlb_init_slave(struct slave
*slave
)
155 SLAVE_TLB_INFO(slave
).load
= 0;
156 SLAVE_TLB_INFO(slave
).head
= TLB_NULL_INDEX
;
159 /* Caller must hold bond lock for read */
160 static void tlb_clear_slave(struct bonding
*bond
, struct slave
*slave
, int save_load
)
162 struct tlb_client_info
*tx_hash_table
;
165 _lock_tx_hashtbl(bond
);
167 /* clear slave from tx_hashtbl */
168 tx_hash_table
= BOND_ALB_INFO(bond
).tx_hashtbl
;
170 index
= SLAVE_TLB_INFO(slave
).head
;
171 while (index
!= TLB_NULL_INDEX
) {
172 u32 next_index
= tx_hash_table
[index
].next
;
173 tlb_init_table_entry(&tx_hash_table
[index
], save_load
);
177 tlb_init_slave(slave
);
179 _unlock_tx_hashtbl(bond
);
182 /* Must be called before starting the monitor timer */
183 static int tlb_initialize(struct bonding
*bond
)
185 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
186 int size
= TLB_HASH_TABLE_SIZE
* sizeof(struct tlb_client_info
);
187 struct tlb_client_info
*new_hashtbl
;
190 spin_lock_init(&(bond_info
->tx_hashtbl_lock
));
192 new_hashtbl
= kzalloc(size
, GFP_KERNEL
);
194 printk(KERN_ERR DRV_NAME
195 ": %s: Error: Failed to allocate TLB hash table\n",
199 _lock_tx_hashtbl(bond
);
201 bond_info
->tx_hashtbl
= new_hashtbl
;
203 for (i
= 0; i
< TLB_HASH_TABLE_SIZE
; i
++) {
204 tlb_init_table_entry(&bond_info
->tx_hashtbl
[i
], 1);
207 _unlock_tx_hashtbl(bond
);
212 /* Must be called only after all slaves have been released */
213 static void tlb_deinitialize(struct bonding
*bond
)
215 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
217 _lock_tx_hashtbl(bond
);
219 kfree(bond_info
->tx_hashtbl
);
220 bond_info
->tx_hashtbl
= NULL
;
222 _unlock_tx_hashtbl(bond
);
225 /* Caller must hold bond lock for read */
226 static struct slave
*tlb_get_least_loaded_slave(struct bonding
*bond
)
228 struct slave
*slave
, *least_loaded
;
232 /* Find the first enabled slave */
233 bond_for_each_slave(bond
, slave
, i
) {
234 if (SLAVE_IS_OK(slave
)) {
244 least_loaded
= slave
;
245 max_gap
= (s64
)(slave
->speed
<< 20) - /* Convert to Megabit per sec */
246 (s64
)(SLAVE_TLB_INFO(slave
).load
<< 3); /* Bytes to bits */
248 /* Find the slave with the largest gap */
249 bond_for_each_slave_from(bond
, slave
, i
, least_loaded
) {
250 if (SLAVE_IS_OK(slave
)) {
251 s64 gap
= (s64
)(slave
->speed
<< 20) -
252 (s64
)(SLAVE_TLB_INFO(slave
).load
<< 3);
254 least_loaded
= slave
;
263 /* Caller must hold bond lock for read */
264 static struct slave
*tlb_choose_channel(struct bonding
*bond
, u32 hash_index
, u32 skb_len
)
266 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
267 struct tlb_client_info
*hash_table
;
268 struct slave
*assigned_slave
;
270 _lock_tx_hashtbl(bond
);
272 hash_table
= bond_info
->tx_hashtbl
;
273 assigned_slave
= hash_table
[hash_index
].tx_slave
;
274 if (!assigned_slave
) {
275 assigned_slave
= tlb_get_least_loaded_slave(bond
);
277 if (assigned_slave
) {
278 struct tlb_slave_info
*slave_info
=
279 &(SLAVE_TLB_INFO(assigned_slave
));
280 u32 next_index
= slave_info
->head
;
282 hash_table
[hash_index
].tx_slave
= assigned_slave
;
283 hash_table
[hash_index
].next
= next_index
;
284 hash_table
[hash_index
].prev
= TLB_NULL_INDEX
;
286 if (next_index
!= TLB_NULL_INDEX
) {
287 hash_table
[next_index
].prev
= hash_index
;
290 slave_info
->head
= hash_index
;
292 hash_table
[hash_index
].load_history
;
296 if (assigned_slave
) {
297 hash_table
[hash_index
].tx_bytes
+= skb_len
;
300 _unlock_tx_hashtbl(bond
);
302 return assigned_slave
;
305 /*********************** rlb specific functions ***************************/
306 static inline void _lock_rx_hashtbl(struct bonding
*bond
)
308 spin_lock(&(BOND_ALB_INFO(bond
).rx_hashtbl_lock
));
311 static inline void _unlock_rx_hashtbl(struct bonding
*bond
)
313 spin_unlock(&(BOND_ALB_INFO(bond
).rx_hashtbl_lock
));
316 /* when an ARP REPLY is received from a client update its info
319 static void rlb_update_entry_from_arp(struct bonding
*bond
, struct arp_pkt
*arp
)
321 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
322 struct rlb_client_info
*client_info
;
325 _lock_rx_hashtbl(bond
);
327 hash_index
= _simple_hash((u8
*)&(arp
->ip_src
), sizeof(arp
->ip_src
));
328 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
330 if ((client_info
->assigned
) &&
331 (client_info
->ip_src
== arp
->ip_dst
) &&
332 (client_info
->ip_dst
== arp
->ip_src
)) {
333 /* update the clients MAC address */
334 memcpy(client_info
->mac_dst
, arp
->mac_src
, ETH_ALEN
);
335 client_info
->ntt
= 1;
336 bond_info
->rx_ntt
= 1;
339 _unlock_rx_hashtbl(bond
);
342 static int rlb_arp_recv(struct sk_buff
*skb
, struct net_device
*bond_dev
, struct packet_type
*ptype
, struct net_device
*orig_dev
)
344 struct bonding
*bond
= bond_dev
->priv
;
345 struct arp_pkt
*arp
= (struct arp_pkt
*)skb
->data
;
346 int res
= NET_RX_DROP
;
348 if (bond_dev
->nd_net
!= &init_net
)
351 if (!(bond_dev
->flags
& IFF_MASTER
))
355 dprintk("Packet has no ARP data\n");
359 if (skb
->len
< sizeof(struct arp_pkt
)) {
360 dprintk("Packet is too small to be an ARP\n");
364 if (arp
->op_code
== htons(ARPOP_REPLY
)) {
365 /* update rx hash table for this ARP */
366 rlb_update_entry_from_arp(bond
, arp
);
367 dprintk("Server received an ARP Reply from client\n");
370 res
= NET_RX_SUCCESS
;
378 /* Caller must hold bond lock for read */
379 static struct slave
*rlb_next_rx_slave(struct bonding
*bond
)
381 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
382 struct slave
*rx_slave
, *slave
, *start_at
;
385 if (bond_info
->next_rx_slave
) {
386 start_at
= bond_info
->next_rx_slave
;
388 start_at
= bond
->first_slave
;
393 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
394 if (SLAVE_IS_OK(slave
)) {
397 } else if (slave
->speed
> rx_slave
->speed
) {
404 bond_info
->next_rx_slave
= rx_slave
->next
;
410 /* teach the switch the mac of a disabled slave
411 * on the primary for fault tolerance
413 * Caller must hold bond->curr_slave_lock for write or bond lock for write
415 static void rlb_teach_disabled_mac_on_primary(struct bonding
*bond
, u8 addr
[])
417 if (!bond
->curr_active_slave
) {
421 if (!bond
->alb_info
.primary_is_promisc
) {
422 bond
->alb_info
.primary_is_promisc
= 1;
423 dev_set_promiscuity(bond
->curr_active_slave
->dev
, 1);
426 bond
->alb_info
.rlb_promisc_timeout_counter
= 0;
428 alb_send_learning_packets(bond
->curr_active_slave
, addr
);
431 /* slave being removed should not be active at this point
433 * Caller must hold bond lock for read
435 static void rlb_clear_slave(struct bonding
*bond
, struct slave
*slave
)
437 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
438 struct rlb_client_info
*rx_hash_table
;
439 u32 index
, next_index
;
441 /* clear slave from rx_hashtbl */
442 _lock_rx_hashtbl(bond
);
444 rx_hash_table
= bond_info
->rx_hashtbl
;
445 index
= bond_info
->rx_hashtbl_head
;
446 for (; index
!= RLB_NULL_INDEX
; index
= next_index
) {
447 next_index
= rx_hash_table
[index
].next
;
448 if (rx_hash_table
[index
].slave
== slave
) {
449 struct slave
*assigned_slave
= rlb_next_rx_slave(bond
);
451 if (assigned_slave
) {
452 rx_hash_table
[index
].slave
= assigned_slave
;
453 if (memcmp(rx_hash_table
[index
].mac_dst
,
454 mac_bcast
, ETH_ALEN
)) {
455 bond_info
->rx_hashtbl
[index
].ntt
= 1;
456 bond_info
->rx_ntt
= 1;
457 /* A slave has been removed from the
458 * table because it is either disabled
459 * or being released. We must retry the
460 * update to avoid clients from not
461 * being updated & disconnecting when
464 bond_info
->rlb_update_retry_counter
=
467 } else { /* there is no active slave */
468 rx_hash_table
[index
].slave
= NULL
;
473 _unlock_rx_hashtbl(bond
);
475 write_lock(&bond
->curr_slave_lock
);
477 if (slave
!= bond
->curr_active_slave
) {
478 rlb_teach_disabled_mac_on_primary(bond
, slave
->dev
->dev_addr
);
481 write_unlock(&bond
->curr_slave_lock
);
484 static void rlb_update_client(struct rlb_client_info
*client_info
)
488 if (!client_info
->slave
) {
492 for (i
= 0; i
< RLB_ARP_BURST_SIZE
; i
++) {
495 skb
= arp_create(ARPOP_REPLY
, ETH_P_ARP
,
497 client_info
->slave
->dev
,
499 client_info
->mac_dst
,
500 client_info
->slave
->dev
->dev_addr
,
501 client_info
->mac_dst
);
503 printk(KERN_ERR DRV_NAME
504 ": %s: Error: failed to create an ARP packet\n",
505 client_info
->slave
->dev
->master
->name
);
509 skb
->dev
= client_info
->slave
->dev
;
511 if (client_info
->tag
) {
512 skb
= vlan_put_tag(skb
, client_info
->vlan_id
);
514 printk(KERN_ERR DRV_NAME
515 ": %s: Error: failed to insert VLAN tag\n",
516 client_info
->slave
->dev
->master
->name
);
525 /* sends ARP REPLIES that update the clients that need updating */
526 static void rlb_update_rx_clients(struct bonding
*bond
)
528 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
529 struct rlb_client_info
*client_info
;
532 _lock_rx_hashtbl(bond
);
534 hash_index
= bond_info
->rx_hashtbl_head
;
535 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
536 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
537 if (client_info
->ntt
) {
538 rlb_update_client(client_info
);
539 if (bond_info
->rlb_update_retry_counter
== 0) {
540 client_info
->ntt
= 0;
545 /* do not update the entries again untill this counter is zero so that
546 * not to confuse the clients.
548 bond_info
->rlb_update_delay_counter
= RLB_UPDATE_DELAY
;
550 _unlock_rx_hashtbl(bond
);
553 /* The slave was assigned a new mac address - update the clients */
554 static void rlb_req_update_slave_clients(struct bonding
*bond
, struct slave
*slave
)
556 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
557 struct rlb_client_info
*client_info
;
561 _lock_rx_hashtbl(bond
);
563 hash_index
= bond_info
->rx_hashtbl_head
;
564 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
565 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
567 if ((client_info
->slave
== slave
) &&
568 memcmp(client_info
->mac_dst
, mac_bcast
, ETH_ALEN
)) {
569 client_info
->ntt
= 1;
574 // update the team's flag only after the whole iteration
576 bond_info
->rx_ntt
= 1;
578 bond_info
->rlb_update_retry_counter
= RLB_UPDATE_RETRY
;
581 _unlock_rx_hashtbl(bond
);
584 /* mark all clients using src_ip to be updated */
585 static void rlb_req_update_subnet_clients(struct bonding
*bond
, __be32 src_ip
)
587 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
588 struct rlb_client_info
*client_info
;
591 _lock_rx_hashtbl(bond
);
593 hash_index
= bond_info
->rx_hashtbl_head
;
594 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
595 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
597 if (!client_info
->slave
) {
598 printk(KERN_ERR DRV_NAME
599 ": %s: Error: found a client with no channel in "
600 "the client's hash table\n",
604 /*update all clients using this src_ip, that are not assigned
605 * to the team's address (curr_active_slave) and have a known
606 * unicast mac address.
608 if ((client_info
->ip_src
== src_ip
) &&
609 memcmp(client_info
->slave
->dev
->dev_addr
,
610 bond
->dev
->dev_addr
, ETH_ALEN
) &&
611 memcmp(client_info
->mac_dst
, mac_bcast
, ETH_ALEN
)) {
612 client_info
->ntt
= 1;
613 bond_info
->rx_ntt
= 1;
617 _unlock_rx_hashtbl(bond
);
620 /* Caller must hold both bond and ptr locks for read */
621 static struct slave
*rlb_choose_channel(struct sk_buff
*skb
, struct bonding
*bond
)
623 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
624 struct arp_pkt
*arp
= arp_pkt(skb
);
625 struct slave
*assigned_slave
;
626 struct rlb_client_info
*client_info
;
629 _lock_rx_hashtbl(bond
);
631 hash_index
= _simple_hash((u8
*)&arp
->ip_dst
, sizeof(arp
->ip_src
));
632 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
634 if (client_info
->assigned
) {
635 if ((client_info
->ip_src
== arp
->ip_src
) &&
636 (client_info
->ip_dst
== arp
->ip_dst
)) {
637 /* the entry is already assigned to this client */
638 if (memcmp(arp
->mac_dst
, mac_bcast
, ETH_ALEN
)) {
639 /* update mac address from arp */
640 memcpy(client_info
->mac_dst
, arp
->mac_dst
, ETH_ALEN
);
643 assigned_slave
= client_info
->slave
;
644 if (assigned_slave
) {
645 _unlock_rx_hashtbl(bond
);
646 return assigned_slave
;
649 /* the entry is already assigned to some other client,
650 * move the old client to primary (curr_active_slave) so
651 * that the new client can be assigned to this entry.
653 if (bond
->curr_active_slave
&&
654 client_info
->slave
!= bond
->curr_active_slave
) {
655 client_info
->slave
= bond
->curr_active_slave
;
656 rlb_update_client(client_info
);
660 /* assign a new slave */
661 assigned_slave
= rlb_next_rx_slave(bond
);
663 if (assigned_slave
) {
664 client_info
->ip_src
= arp
->ip_src
;
665 client_info
->ip_dst
= arp
->ip_dst
;
666 /* arp->mac_dst is broadcast for arp reqeusts.
667 * will be updated with clients actual unicast mac address
668 * upon receiving an arp reply.
670 memcpy(client_info
->mac_dst
, arp
->mac_dst
, ETH_ALEN
);
671 client_info
->slave
= assigned_slave
;
673 if (memcmp(client_info
->mac_dst
, mac_bcast
, ETH_ALEN
)) {
674 client_info
->ntt
= 1;
675 bond
->alb_info
.rx_ntt
= 1;
677 client_info
->ntt
= 0;
680 if (!list_empty(&bond
->vlan_list
)) {
681 unsigned short vlan_id
;
682 int res
= vlan_get_tag(skb
, &vlan_id
);
684 client_info
->tag
= 1;
685 client_info
->vlan_id
= vlan_id
;
689 if (!client_info
->assigned
) {
690 u32 prev_tbl_head
= bond_info
->rx_hashtbl_head
;
691 bond_info
->rx_hashtbl_head
= hash_index
;
692 client_info
->next
= prev_tbl_head
;
693 if (prev_tbl_head
!= RLB_NULL_INDEX
) {
694 bond_info
->rx_hashtbl
[prev_tbl_head
].prev
=
697 client_info
->assigned
= 1;
701 _unlock_rx_hashtbl(bond
);
703 return assigned_slave
;
706 /* chooses (and returns) transmit channel for arp reply
707 * does not choose channel for other arp types since they are
708 * sent on the curr_active_slave
710 static struct slave
*rlb_arp_xmit(struct sk_buff
*skb
, struct bonding
*bond
)
712 struct arp_pkt
*arp
= arp_pkt(skb
);
713 struct slave
*tx_slave
= NULL
;
715 if (arp
->op_code
== __constant_htons(ARPOP_REPLY
)) {
716 /* the arp must be sent on the selected
719 tx_slave
= rlb_choose_channel(skb
, bond
);
721 memcpy(arp
->mac_src
,tx_slave
->dev
->dev_addr
, ETH_ALEN
);
723 dprintk("Server sent ARP Reply packet\n");
724 } else if (arp
->op_code
== __constant_htons(ARPOP_REQUEST
)) {
725 /* Create an entry in the rx_hashtbl for this client as a
727 * When the arp reply is received the entry will be updated
728 * with the correct unicast address of the client.
730 rlb_choose_channel(skb
, bond
);
732 /* The ARP relpy packets must be delayed so that
733 * they can cancel out the influence of the ARP request.
735 bond
->alb_info
.rlb_update_delay_counter
= RLB_UPDATE_DELAY
;
737 /* arp requests are broadcast and are sent on the primary
738 * the arp request will collapse all clients on the subnet to
739 * the primary slave. We must register these clients to be
740 * updated with their assigned mac.
742 rlb_req_update_subnet_clients(bond
, arp
->ip_src
);
743 dprintk("Server sent ARP Request packet\n");
749 /* Caller must hold bond lock for read */
750 static void rlb_rebalance(struct bonding
*bond
)
752 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
753 struct slave
*assigned_slave
;
754 struct rlb_client_info
*client_info
;
758 _lock_rx_hashtbl(bond
);
761 hash_index
= bond_info
->rx_hashtbl_head
;
762 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
763 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
764 assigned_slave
= rlb_next_rx_slave(bond
);
765 if (assigned_slave
&& (client_info
->slave
!= assigned_slave
)) {
766 client_info
->slave
= assigned_slave
;
767 client_info
->ntt
= 1;
772 /* update the team's flag only after the whole iteration */
774 bond_info
->rx_ntt
= 1;
776 _unlock_rx_hashtbl(bond
);
779 /* Caller must hold rx_hashtbl lock */
780 static void rlb_init_table_entry(struct rlb_client_info
*entry
)
782 memset(entry
, 0, sizeof(struct rlb_client_info
));
783 entry
->next
= RLB_NULL_INDEX
;
784 entry
->prev
= RLB_NULL_INDEX
;
787 static int rlb_initialize(struct bonding
*bond
)
789 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
790 struct packet_type
*pk_type
= &(BOND_ALB_INFO(bond
).rlb_pkt_type
);
791 struct rlb_client_info
*new_hashtbl
;
792 int size
= RLB_HASH_TABLE_SIZE
* sizeof(struct rlb_client_info
);
795 spin_lock_init(&(bond_info
->rx_hashtbl_lock
));
797 new_hashtbl
= kmalloc(size
, GFP_KERNEL
);
799 printk(KERN_ERR DRV_NAME
800 ": %s: Error: Failed to allocate RLB hash table\n",
804 _lock_rx_hashtbl(bond
);
806 bond_info
->rx_hashtbl
= new_hashtbl
;
808 bond_info
->rx_hashtbl_head
= RLB_NULL_INDEX
;
810 for (i
= 0; i
< RLB_HASH_TABLE_SIZE
; i
++) {
811 rlb_init_table_entry(bond_info
->rx_hashtbl
+ i
);
814 _unlock_rx_hashtbl(bond
);
816 /*initialize packet type*/
817 pk_type
->type
= __constant_htons(ETH_P_ARP
);
818 pk_type
->dev
= bond
->dev
;
819 pk_type
->func
= rlb_arp_recv
;
821 /* register to receive ARPs */
822 dev_add_pack(pk_type
);
827 static void rlb_deinitialize(struct bonding
*bond
)
829 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
831 dev_remove_pack(&(bond_info
->rlb_pkt_type
));
833 _lock_rx_hashtbl(bond
);
835 kfree(bond_info
->rx_hashtbl
);
836 bond_info
->rx_hashtbl
= NULL
;
837 bond_info
->rx_hashtbl_head
= RLB_NULL_INDEX
;
839 _unlock_rx_hashtbl(bond
);
842 static void rlb_clear_vlan(struct bonding
*bond
, unsigned short vlan_id
)
844 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
847 _lock_rx_hashtbl(bond
);
849 curr_index
= bond_info
->rx_hashtbl_head
;
850 while (curr_index
!= RLB_NULL_INDEX
) {
851 struct rlb_client_info
*curr
= &(bond_info
->rx_hashtbl
[curr_index
]);
852 u32 next_index
= bond_info
->rx_hashtbl
[curr_index
].next
;
853 u32 prev_index
= bond_info
->rx_hashtbl
[curr_index
].prev
;
855 if (curr
->tag
&& (curr
->vlan_id
== vlan_id
)) {
856 if (curr_index
== bond_info
->rx_hashtbl_head
) {
857 bond_info
->rx_hashtbl_head
= next_index
;
859 if (prev_index
!= RLB_NULL_INDEX
) {
860 bond_info
->rx_hashtbl
[prev_index
].next
= next_index
;
862 if (next_index
!= RLB_NULL_INDEX
) {
863 bond_info
->rx_hashtbl
[next_index
].prev
= prev_index
;
866 rlb_init_table_entry(curr
);
869 curr_index
= next_index
;
872 _unlock_rx_hashtbl(bond
);
875 /*********************** tlb/rlb shared functions *********************/
877 static void alb_send_learning_packets(struct slave
*slave
, u8 mac_addr
[])
879 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
880 struct learning_pkt pkt
;
881 int size
= sizeof(struct learning_pkt
);
884 memset(&pkt
, 0, size
);
885 memcpy(pkt
.mac_dst
, mac_addr
, ETH_ALEN
);
886 memcpy(pkt
.mac_src
, mac_addr
, ETH_ALEN
);
887 pkt
.type
= __constant_htons(ETH_P_LOOP
);
889 for (i
= 0; i
< MAX_LP_BURST
; i
++) {
893 skb
= dev_alloc_skb(size
);
898 data
= skb_put(skb
, size
);
899 memcpy(data
, &pkt
, size
);
901 skb_reset_mac_header(skb
);
902 skb
->network_header
= skb
->mac_header
+ ETH_HLEN
;
903 skb
->protocol
= pkt
.type
;
904 skb
->priority
= TC_PRIO_CONTROL
;
905 skb
->dev
= slave
->dev
;
907 if (!list_empty(&bond
->vlan_list
)) {
908 struct vlan_entry
*vlan
;
910 vlan
= bond_next_vlan(bond
,
911 bond
->alb_info
.current_alb_vlan
);
913 bond
->alb_info
.current_alb_vlan
= vlan
;
919 skb
= vlan_put_tag(skb
, vlan
->vlan_id
);
921 printk(KERN_ERR DRV_NAME
922 ": %s: Error: failed to insert VLAN tag\n",
932 /* hw is a boolean parameter that determines whether we should try and
933 * set the hw address of the device as well as the hw address of the
936 static int alb_set_slave_mac_addr(struct slave
*slave
, u8 addr
[], int hw
)
938 struct net_device
*dev
= slave
->dev
;
939 struct sockaddr s_addr
;
942 memcpy(dev
->dev_addr
, addr
, dev
->addr_len
);
946 /* for rlb each slave must have a unique hw mac addresses so that */
947 /* each slave will receive packets destined to a different mac */
948 memcpy(s_addr
.sa_data
, addr
, dev
->addr_len
);
949 s_addr
.sa_family
= dev
->type
;
950 if (dev_set_mac_address(dev
, &s_addr
)) {
951 printk(KERN_ERR DRV_NAME
952 ": %s: Error: dev_set_mac_address of dev %s failed! ALB "
953 "mode requires that the base driver support setting "
954 "the hw address also when the network device's "
955 "interface is open\n",
956 dev
->master
->name
, dev
->name
);
962 /* Caller must hold bond lock for write or curr_slave_lock for write*/
963 static void alb_swap_mac_addr(struct bonding
*bond
, struct slave
*slave1
, struct slave
*slave2
)
965 struct slave
*disabled_slave
= NULL
;
966 u8 tmp_mac_addr
[ETH_ALEN
];
967 int slaves_state_differ
;
969 slaves_state_differ
= (SLAVE_IS_OK(slave1
) != SLAVE_IS_OK(slave2
));
971 memcpy(tmp_mac_addr
, slave1
->dev
->dev_addr
, ETH_ALEN
);
972 alb_set_slave_mac_addr(slave1
, slave2
->dev
->dev_addr
, bond
->alb_info
.rlb_enabled
);
973 alb_set_slave_mac_addr(slave2
, tmp_mac_addr
, bond
->alb_info
.rlb_enabled
);
975 /* fasten the change in the switch */
976 if (SLAVE_IS_OK(slave1
)) {
977 alb_send_learning_packets(slave1
, slave1
->dev
->dev_addr
);
978 if (bond
->alb_info
.rlb_enabled
) {
979 /* inform the clients that the mac address
982 rlb_req_update_slave_clients(bond
, slave1
);
985 disabled_slave
= slave1
;
988 if (SLAVE_IS_OK(slave2
)) {
989 alb_send_learning_packets(slave2
, slave2
->dev
->dev_addr
);
990 if (bond
->alb_info
.rlb_enabled
) {
991 /* inform the clients that the mac address
994 rlb_req_update_slave_clients(bond
, slave2
);
997 disabled_slave
= slave2
;
1000 if (bond
->alb_info
.rlb_enabled
&& slaves_state_differ
) {
1001 /* A disabled slave was assigned an active mac addr */
1002 rlb_teach_disabled_mac_on_primary(bond
,
1003 disabled_slave
->dev
->dev_addr
);
1008 * alb_change_hw_addr_on_detach
1009 * @bond: bonding we're working on
1010 * @slave: the slave that was just detached
1012 * We assume that @slave was already detached from the slave list.
1014 * If @slave's permanent hw address is different both from its current
1015 * address and from @bond's address, then somewhere in the bond there's
1016 * a slave that has @slave's permanet address as its current address.
1017 * We'll make sure that that slave no longer uses @slave's permanent address.
1019 * Caller must hold bond lock
1021 static void alb_change_hw_addr_on_detach(struct bonding
*bond
, struct slave
*slave
)
1026 perm_curr_diff
= memcmp(slave
->perm_hwaddr
,
1027 slave
->dev
->dev_addr
,
1029 perm_bond_diff
= memcmp(slave
->perm_hwaddr
,
1030 bond
->dev
->dev_addr
,
1033 if (perm_curr_diff
&& perm_bond_diff
) {
1034 struct slave
*tmp_slave
;
1037 bond_for_each_slave(bond
, tmp_slave
, i
) {
1038 if (!memcmp(slave
->perm_hwaddr
,
1039 tmp_slave
->dev
->dev_addr
,
1047 alb_swap_mac_addr(bond
, slave
, tmp_slave
);
1053 * alb_handle_addr_collision_on_attach
1054 * @bond: bonding we're working on
1055 * @slave: the slave that was just attached
1057 * checks uniqueness of slave's mac address and handles the case the
1058 * new slave uses the bonds mac address.
1060 * If the permanent hw address of @slave is @bond's hw address, we need to
1061 * find a different hw address to give @slave, that isn't in use by any other
1062 * slave in the bond. This address must be, of course, one of the premanent
1063 * addresses of the other slaves.
1065 * We go over the slave list, and for each slave there we compare its
1066 * permanent hw address with the current address of all the other slaves.
1067 * If no match was found, then we've found a slave with a permanent address
1068 * that isn't used by any other slave in the bond, so we can assign it to
1071 * assumption: this function is called before @slave is attached to the
1074 * caller must hold the bond lock for write since the mac addresses are compared
1075 * and may be swapped.
1077 static int alb_handle_addr_collision_on_attach(struct bonding
*bond
, struct slave
*slave
)
1079 struct slave
*tmp_slave1
, *tmp_slave2
, *free_mac_slave
;
1080 struct slave
*has_bond_addr
= bond
->curr_active_slave
;
1081 int i
, j
, found
= 0;
1083 if (bond
->slave_cnt
== 0) {
1084 /* this is the first slave */
1088 /* if slave's mac address differs from bond's mac address
1089 * check uniqueness of slave's mac address against the other
1090 * slaves in the bond.
1092 if (memcmp(slave
->perm_hwaddr
, bond
->dev
->dev_addr
, ETH_ALEN
)) {
1093 bond_for_each_slave(bond
, tmp_slave1
, i
) {
1094 if (!memcmp(tmp_slave1
->dev
->dev_addr
, slave
->dev
->dev_addr
,
1104 /* Try setting slave mac to bond address and fall-through
1105 to code handling that situation below... */
1106 alb_set_slave_mac_addr(slave
, bond
->dev
->dev_addr
,
1107 bond
->alb_info
.rlb_enabled
);
1110 /* The slave's address is equal to the address of the bond.
1111 * Search for a spare address in the bond for this slave.
1113 free_mac_slave
= NULL
;
1115 bond_for_each_slave(bond
, tmp_slave1
, i
) {
1117 bond_for_each_slave(bond
, tmp_slave2
, j
) {
1118 if (!memcmp(tmp_slave1
->perm_hwaddr
,
1119 tmp_slave2
->dev
->dev_addr
,
1127 /* no slave has tmp_slave1's perm addr
1130 free_mac_slave
= tmp_slave1
;
1134 if (!has_bond_addr
) {
1135 if (!memcmp(tmp_slave1
->dev
->dev_addr
,
1136 bond
->dev
->dev_addr
,
1139 has_bond_addr
= tmp_slave1
;
1144 if (free_mac_slave
) {
1145 alb_set_slave_mac_addr(slave
, free_mac_slave
->perm_hwaddr
,
1146 bond
->alb_info
.rlb_enabled
);
1148 printk(KERN_WARNING DRV_NAME
1149 ": %s: Warning: the hw address of slave %s is in use by "
1150 "the bond; giving it the hw address of %s\n",
1151 bond
->dev
->name
, slave
->dev
->name
, free_mac_slave
->dev
->name
);
1153 } else if (has_bond_addr
) {
1154 printk(KERN_ERR DRV_NAME
1155 ": %s: Error: the hw address of slave %s is in use by the "
1156 "bond; couldn't find a slave with a free hw address to "
1157 "give it (this should not have happened)\n",
1158 bond
->dev
->name
, slave
->dev
->name
);
1166 * alb_set_mac_address
1170 * In TLB mode all slaves are configured to the bond's hw address, but set
1171 * their dev_addr field to different addresses (based on their permanent hw
1174 * For each slave, this function sets the interface to the new address and then
1175 * changes its dev_addr field to its previous value.
1177 * Unwinding assumes bond's mac address has not yet changed.
1179 static int alb_set_mac_address(struct bonding
*bond
, void *addr
)
1182 struct slave
*slave
, *stop_at
;
1183 char tmp_addr
[ETH_ALEN
];
1187 if (bond
->alb_info
.rlb_enabled
) {
1191 bond_for_each_slave(bond
, slave
, i
) {
1192 if (slave
->dev
->set_mac_address
== NULL
) {
1197 /* save net_device's current hw address */
1198 memcpy(tmp_addr
, slave
->dev
->dev_addr
, ETH_ALEN
);
1200 res
= dev_set_mac_address(slave
->dev
, addr
);
1202 /* restore net_device's hw address */
1203 memcpy(slave
->dev
->dev_addr
, tmp_addr
, ETH_ALEN
);
1213 memcpy(sa
.sa_data
, bond
->dev
->dev_addr
, bond
->dev
->addr_len
);
1214 sa
.sa_family
= bond
->dev
->type
;
1216 /* unwind from head to the slave that failed */
1218 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
1219 memcpy(tmp_addr
, slave
->dev
->dev_addr
, ETH_ALEN
);
1220 dev_set_mac_address(slave
->dev
, &sa
);
1221 memcpy(slave
->dev
->dev_addr
, tmp_addr
, ETH_ALEN
);
1227 /************************ exported alb funcions ************************/
1229 int bond_alb_initialize(struct bonding
*bond
, int rlb_enabled
)
1233 res
= tlb_initialize(bond
);
1239 bond
->alb_info
.rlb_enabled
= 1;
1240 /* initialize rlb */
1241 res
= rlb_initialize(bond
);
1243 tlb_deinitialize(bond
);
1247 bond
->alb_info
.rlb_enabled
= 0;
1253 void bond_alb_deinitialize(struct bonding
*bond
)
1255 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1257 tlb_deinitialize(bond
);
1259 if (bond_info
->rlb_enabled
) {
1260 rlb_deinitialize(bond
);
1264 int bond_alb_xmit(struct sk_buff
*skb
, struct net_device
*bond_dev
)
1266 struct bonding
*bond
= bond_dev
->priv
;
1267 struct ethhdr
*eth_data
;
1268 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1269 struct slave
*tx_slave
= NULL
;
1270 static const __be32 ip_bcast
= htonl(0xffffffff);
1272 int do_tx_balance
= 1;
1274 const u8
*hash_start
= NULL
;
1277 skb_reset_mac_header(skb
);
1278 eth_data
= eth_hdr(skb
);
1280 /* make sure that the curr_active_slave and the slaves list do
1281 * not change during tx
1283 read_lock(&bond
->lock
);
1284 read_lock(&bond
->curr_slave_lock
);
1286 if (!BOND_IS_OK(bond
)) {
1290 switch (ntohs(skb
->protocol
)) {
1292 const struct iphdr
*iph
= ip_hdr(skb
);
1294 if ((memcmp(eth_data
->h_dest
, mac_bcast
, ETH_ALEN
) == 0) ||
1295 (iph
->daddr
== ip_bcast
) ||
1296 (iph
->protocol
== IPPROTO_IGMP
)) {
1300 hash_start
= (char *)&(iph
->daddr
);
1301 hash_size
= sizeof(iph
->daddr
);
1305 if (memcmp(eth_data
->h_dest
, mac_bcast
, ETH_ALEN
) == 0) {
1310 hash_start
= (char *)&(ipv6_hdr(skb
)->daddr
);
1311 hash_size
= sizeof(ipv6_hdr(skb
)->daddr
);
1314 if (ipx_hdr(skb
)->ipx_checksum
!= IPX_NO_CHECKSUM
) {
1315 /* something is wrong with this packet */
1320 if (ipx_hdr(skb
)->ipx_type
!= IPX_TYPE_NCP
) {
1321 /* The only protocol worth balancing in
1322 * this family since it has an "ARP" like
1329 hash_start
= (char*)eth_data
->h_dest
;
1330 hash_size
= ETH_ALEN
;
1334 if (bond_info
->rlb_enabled
) {
1335 tx_slave
= rlb_arp_xmit(skb
, bond
);
1343 if (do_tx_balance
) {
1344 hash_index
= _simple_hash(hash_start
, hash_size
);
1345 tx_slave
= tlb_choose_channel(bond
, hash_index
, skb
->len
);
1349 /* unbalanced or unassigned, send through primary */
1350 tx_slave
= bond
->curr_active_slave
;
1351 bond_info
->unbalanced_load
+= skb
->len
;
1354 if (tx_slave
&& SLAVE_IS_OK(tx_slave
)) {
1355 if (tx_slave
!= bond
->curr_active_slave
) {
1356 memcpy(eth_data
->h_source
,
1357 tx_slave
->dev
->dev_addr
,
1361 res
= bond_dev_queue_xmit(bond
, skb
, tx_slave
->dev
);
1364 tlb_clear_slave(bond
, tx_slave
, 0);
1370 /* no suitable interface, frame not sent */
1373 read_unlock(&bond
->curr_slave_lock
);
1374 read_unlock(&bond
->lock
);
1378 void bond_alb_monitor(struct bonding
*bond
)
1380 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1381 struct slave
*slave
;
1384 read_lock(&bond
->lock
);
1386 if (bond
->kill_timers
) {
1390 if (bond
->slave_cnt
== 0) {
1391 bond_info
->tx_rebalance_counter
= 0;
1392 bond_info
->lp_counter
= 0;
1396 bond_info
->tx_rebalance_counter
++;
1397 bond_info
->lp_counter
++;
1399 /* send learning packets */
1400 if (bond_info
->lp_counter
>= BOND_ALB_LP_TICKS
) {
1401 /* change of curr_active_slave involves swapping of mac addresses.
1402 * in order to avoid this swapping from happening while
1403 * sending the learning packets, the curr_slave_lock must be held for
1406 read_lock(&bond
->curr_slave_lock
);
1408 bond_for_each_slave(bond
, slave
, i
) {
1409 alb_send_learning_packets(slave
, slave
->dev
->dev_addr
);
1412 read_unlock(&bond
->curr_slave_lock
);
1414 bond_info
->lp_counter
= 0;
1417 /* rebalance tx traffic */
1418 if (bond_info
->tx_rebalance_counter
>= BOND_TLB_REBALANCE_TICKS
) {
1420 read_lock(&bond
->curr_slave_lock
);
1422 bond_for_each_slave(bond
, slave
, i
) {
1423 tlb_clear_slave(bond
, slave
, 1);
1424 if (slave
== bond
->curr_active_slave
) {
1425 SLAVE_TLB_INFO(slave
).load
=
1426 bond_info
->unbalanced_load
/
1427 BOND_TLB_REBALANCE_INTERVAL
;
1428 bond_info
->unbalanced_load
= 0;
1432 read_unlock(&bond
->curr_slave_lock
);
1434 bond_info
->tx_rebalance_counter
= 0;
1437 /* handle rlb stuff */
1438 if (bond_info
->rlb_enabled
) {
1439 /* the following code changes the promiscuity of the
1440 * the curr_active_slave. It needs to be locked with a
1441 * write lock to protect from other code that also
1442 * sets the promiscuity.
1444 write_lock_bh(&bond
->curr_slave_lock
);
1446 if (bond_info
->primary_is_promisc
&&
1447 (++bond_info
->rlb_promisc_timeout_counter
>= RLB_PROMISC_TIMEOUT
)) {
1449 bond_info
->rlb_promisc_timeout_counter
= 0;
1451 /* If the primary was set to promiscuous mode
1452 * because a slave was disabled then
1453 * it can now leave promiscuous mode.
1455 dev_set_promiscuity(bond
->curr_active_slave
->dev
, -1);
1456 bond_info
->primary_is_promisc
= 0;
1459 write_unlock_bh(&bond
->curr_slave_lock
);
1461 if (bond_info
->rlb_rebalance
) {
1462 bond_info
->rlb_rebalance
= 0;
1463 rlb_rebalance(bond
);
1466 /* check if clients need updating */
1467 if (bond_info
->rx_ntt
) {
1468 if (bond_info
->rlb_update_delay_counter
) {
1469 --bond_info
->rlb_update_delay_counter
;
1471 rlb_update_rx_clients(bond
);
1472 if (bond_info
->rlb_update_retry_counter
) {
1473 --bond_info
->rlb_update_retry_counter
;
1475 bond_info
->rx_ntt
= 0;
1482 mod_timer(&(bond_info
->alb_timer
), jiffies
+ alb_delta_in_ticks
);
1484 read_unlock(&bond
->lock
);
1487 /* assumption: called before the slave is attached to the bond
1488 * and not locked by the bond lock
1490 int bond_alb_init_slave(struct bonding
*bond
, struct slave
*slave
)
1494 res
= alb_set_slave_mac_addr(slave
, slave
->perm_hwaddr
,
1495 bond
->alb_info
.rlb_enabled
);
1500 /* caller must hold the bond lock for write since the mac addresses
1501 * are compared and may be swapped.
1503 write_lock_bh(&bond
->lock
);
1505 res
= alb_handle_addr_collision_on_attach(bond
, slave
);
1507 write_unlock_bh(&bond
->lock
);
1513 tlb_init_slave(slave
);
1515 /* order a rebalance ASAP */
1516 bond
->alb_info
.tx_rebalance_counter
= BOND_TLB_REBALANCE_TICKS
;
1518 if (bond
->alb_info
.rlb_enabled
) {
1519 bond
->alb_info
.rlb_rebalance
= 1;
1525 /* Caller must hold bond lock for write */
1526 void bond_alb_deinit_slave(struct bonding
*bond
, struct slave
*slave
)
1528 if (bond
->slave_cnt
> 1) {
1529 alb_change_hw_addr_on_detach(bond
, slave
);
1532 tlb_clear_slave(bond
, slave
, 0);
1534 if (bond
->alb_info
.rlb_enabled
) {
1535 bond
->alb_info
.next_rx_slave
= NULL
;
1536 rlb_clear_slave(bond
, slave
);
1540 /* Caller must hold bond lock for read */
1541 void bond_alb_handle_link_change(struct bonding
*bond
, struct slave
*slave
, char link
)
1543 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1545 if (link
== BOND_LINK_DOWN
) {
1546 tlb_clear_slave(bond
, slave
, 0);
1547 if (bond
->alb_info
.rlb_enabled
) {
1548 rlb_clear_slave(bond
, slave
);
1550 } else if (link
== BOND_LINK_UP
) {
1551 /* order a rebalance ASAP */
1552 bond_info
->tx_rebalance_counter
= BOND_TLB_REBALANCE_TICKS
;
1553 if (bond
->alb_info
.rlb_enabled
) {
1554 bond
->alb_info
.rlb_rebalance
= 1;
1555 /* If the updelay module parameter is smaller than the
1556 * forwarding delay of the switch the rebalance will
1557 * not work because the rebalance arp replies will
1558 * not be forwarded to the clients..
1565 * bond_alb_handle_active_change - assign new curr_active_slave
1566 * @bond: our bonding struct
1567 * @new_slave: new slave to assign
1569 * Set the bond->curr_active_slave to @new_slave and handle
1570 * mac address swapping and promiscuity changes as needed.
1572 * Caller must hold bond curr_slave_lock for write (or bond lock for write)
1574 void bond_alb_handle_active_change(struct bonding
*bond
, struct slave
*new_slave
)
1576 struct slave
*swap_slave
;
1579 if (bond
->curr_active_slave
== new_slave
) {
1583 if (bond
->curr_active_slave
&& bond
->alb_info
.primary_is_promisc
) {
1584 dev_set_promiscuity(bond
->curr_active_slave
->dev
, -1);
1585 bond
->alb_info
.primary_is_promisc
= 0;
1586 bond
->alb_info
.rlb_promisc_timeout_counter
= 0;
1589 swap_slave
= bond
->curr_active_slave
;
1590 bond
->curr_active_slave
= new_slave
;
1592 if (!new_slave
|| (bond
->slave_cnt
== 0)) {
1596 /* set the new curr_active_slave to the bonds mac address
1597 * i.e. swap mac addresses of old curr_active_slave and new curr_active_slave
1600 struct slave
*tmp_slave
;
1601 /* find slave that is holding the bond's mac address */
1602 bond_for_each_slave(bond
, tmp_slave
, i
) {
1603 if (!memcmp(tmp_slave
->dev
->dev_addr
,
1604 bond
->dev
->dev_addr
, ETH_ALEN
)) {
1605 swap_slave
= tmp_slave
;
1611 /* curr_active_slave must be set before calling alb_swap_mac_addr */
1613 /* swap mac address */
1614 alb_swap_mac_addr(bond
, swap_slave
, new_slave
);
1616 /* set the new_slave to the bond mac address */
1617 alb_set_slave_mac_addr(new_slave
, bond
->dev
->dev_addr
,
1618 bond
->alb_info
.rlb_enabled
);
1619 /* fasten bond mac on new current slave */
1620 alb_send_learning_packets(new_slave
, bond
->dev
->dev_addr
);
1624 int bond_alb_set_mac_address(struct net_device
*bond_dev
, void *addr
)
1626 struct bonding
*bond
= bond_dev
->priv
;
1627 struct sockaddr
*sa
= addr
;
1628 struct slave
*slave
, *swap_slave
;
1632 if (!is_valid_ether_addr(sa
->sa_data
)) {
1633 return -EADDRNOTAVAIL
;
1636 res
= alb_set_mac_address(bond
, addr
);
1641 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
1643 /* If there is no curr_active_slave there is nothing else to do.
1644 * Otherwise we'll need to pass the new address to it and handle
1647 if (!bond
->curr_active_slave
) {
1653 bond_for_each_slave(bond
, slave
, i
) {
1654 if (!memcmp(slave
->dev
->dev_addr
, bond_dev
->dev_addr
, ETH_ALEN
)) {
1661 alb_swap_mac_addr(bond
, swap_slave
, bond
->curr_active_slave
);
1663 alb_set_slave_mac_addr(bond
->curr_active_slave
, bond_dev
->dev_addr
,
1664 bond
->alb_info
.rlb_enabled
);
1666 alb_send_learning_packets(bond
->curr_active_slave
, bond_dev
->dev_addr
);
1667 if (bond
->alb_info
.rlb_enabled
) {
1668 /* inform clients mac address has changed */
1669 rlb_req_update_slave_clients(bond
, bond
->curr_active_slave
);
1676 void bond_alb_clear_vlan(struct bonding
*bond
, unsigned short vlan_id
)
1678 if (bond
->alb_info
.current_alb_vlan
&&
1679 (bond
->alb_info
.current_alb_vlan
->vlan_id
== vlan_id
)) {
1680 bond
->alb_info
.current_alb_vlan
= NULL
;
1683 if (bond
->alb_info
.rlb_enabled
) {
1684 rlb_clear_vlan(bond
, vlan_id
);