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_bh(struct bonding
*bond
)
104 spin_lock_bh(&(BOND_ALB_INFO(bond
).tx_hashtbl_lock
));
107 static inline void _unlock_tx_hashtbl_bh(struct bonding
*bond
)
109 spin_unlock_bh(&(BOND_ALB_INFO(bond
).tx_hashtbl_lock
));
112 static inline void _lock_tx_hashtbl(struct bonding
*bond
)
114 spin_lock(&(BOND_ALB_INFO(bond
).tx_hashtbl_lock
));
117 static inline void _unlock_tx_hashtbl(struct bonding
*bond
)
119 spin_unlock(&(BOND_ALB_INFO(bond
).tx_hashtbl_lock
));
122 /* Caller must hold tx_hashtbl lock */
123 static inline void tlb_init_table_entry(struct tlb_client_info
*entry
, int save_load
)
126 entry
->load_history
= 1 + entry
->tx_bytes
/
127 BOND_TLB_REBALANCE_INTERVAL
;
131 entry
->tx_slave
= NULL
;
132 entry
->next
= TLB_NULL_INDEX
;
133 entry
->prev
= TLB_NULL_INDEX
;
136 static inline void tlb_init_slave(struct slave
*slave
)
138 SLAVE_TLB_INFO(slave
).load
= 0;
139 SLAVE_TLB_INFO(slave
).head
= TLB_NULL_INDEX
;
142 /* Caller must hold bond lock for read, BH disabled */
143 static void __tlb_clear_slave(struct bonding
*bond
, struct slave
*slave
,
146 struct tlb_client_info
*tx_hash_table
;
149 /* clear slave from tx_hashtbl */
150 tx_hash_table
= BOND_ALB_INFO(bond
).tx_hashtbl
;
152 /* skip this if we've already freed the tx hash table */
154 index
= SLAVE_TLB_INFO(slave
).head
;
155 while (index
!= TLB_NULL_INDEX
) {
156 u32 next_index
= tx_hash_table
[index
].next
;
157 tlb_init_table_entry(&tx_hash_table
[index
], save_load
);
162 tlb_init_slave(slave
);
165 /* Caller must hold bond lock for read */
166 static void tlb_clear_slave(struct bonding
*bond
, struct slave
*slave
,
169 _lock_tx_hashtbl_bh(bond
);
170 __tlb_clear_slave(bond
, slave
, save_load
);
171 _unlock_tx_hashtbl_bh(bond
);
174 /* Must be called before starting the monitor timer */
175 static int tlb_initialize(struct bonding
*bond
)
177 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
178 int size
= TLB_HASH_TABLE_SIZE
* sizeof(struct tlb_client_info
);
179 struct tlb_client_info
*new_hashtbl
;
182 new_hashtbl
= kzalloc(size
, GFP_KERNEL
);
186 _lock_tx_hashtbl_bh(bond
);
188 bond_info
->tx_hashtbl
= new_hashtbl
;
190 for (i
= 0; i
< TLB_HASH_TABLE_SIZE
; i
++) {
191 tlb_init_table_entry(&bond_info
->tx_hashtbl
[i
], 0);
194 _unlock_tx_hashtbl_bh(bond
);
199 /* Must be called only after all slaves have been released */
200 static void tlb_deinitialize(struct bonding
*bond
)
202 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
204 _lock_tx_hashtbl_bh(bond
);
206 kfree(bond_info
->tx_hashtbl
);
207 bond_info
->tx_hashtbl
= NULL
;
209 _unlock_tx_hashtbl_bh(bond
);
212 static long long compute_gap(struct slave
*slave
)
214 return (s64
) (slave
->speed
<< 20) - /* Convert to Megabit per sec */
215 (s64
) (SLAVE_TLB_INFO(slave
).load
<< 3); /* Bytes to bits */
218 /* Caller must hold bond lock for read */
219 static struct slave
*tlb_get_least_loaded_slave(struct bonding
*bond
)
221 struct slave
*slave
, *least_loaded
;
228 /* Find the slave with the largest gap */
229 bond_for_each_slave(bond
, slave
, i
) {
230 if (SLAVE_IS_OK(slave
)) {
231 long long gap
= compute_gap(slave
);
234 least_loaded
= slave
;
243 static struct slave
*__tlb_choose_channel(struct bonding
*bond
, u32 hash_index
,
246 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
247 struct tlb_client_info
*hash_table
;
248 struct slave
*assigned_slave
;
250 hash_table
= bond_info
->tx_hashtbl
;
251 assigned_slave
= hash_table
[hash_index
].tx_slave
;
252 if (!assigned_slave
) {
253 assigned_slave
= tlb_get_least_loaded_slave(bond
);
255 if (assigned_slave
) {
256 struct tlb_slave_info
*slave_info
=
257 &(SLAVE_TLB_INFO(assigned_slave
));
258 u32 next_index
= slave_info
->head
;
260 hash_table
[hash_index
].tx_slave
= assigned_slave
;
261 hash_table
[hash_index
].next
= next_index
;
262 hash_table
[hash_index
].prev
= TLB_NULL_INDEX
;
264 if (next_index
!= TLB_NULL_INDEX
) {
265 hash_table
[next_index
].prev
= hash_index
;
268 slave_info
->head
= hash_index
;
270 hash_table
[hash_index
].load_history
;
274 if (assigned_slave
) {
275 hash_table
[hash_index
].tx_bytes
+= skb_len
;
278 return assigned_slave
;
281 /* Caller must hold bond lock for read */
282 static struct slave
*tlb_choose_channel(struct bonding
*bond
, u32 hash_index
,
285 struct slave
*tx_slave
;
287 * We don't need to disable softirq here, becase
288 * tlb_choose_channel() is only called by bond_alb_xmit()
289 * which already has softirq disabled.
291 _lock_tx_hashtbl(bond
);
292 tx_slave
= __tlb_choose_channel(bond
, hash_index
, skb_len
);
293 _unlock_tx_hashtbl(bond
);
297 /*********************** rlb specific functions ***************************/
298 static inline void _lock_rx_hashtbl_bh(struct bonding
*bond
)
300 spin_lock_bh(&(BOND_ALB_INFO(bond
).rx_hashtbl_lock
));
303 static inline void _unlock_rx_hashtbl_bh(struct bonding
*bond
)
305 spin_unlock_bh(&(BOND_ALB_INFO(bond
).rx_hashtbl_lock
));
308 static inline void _lock_rx_hashtbl(struct bonding
*bond
)
310 spin_lock(&(BOND_ALB_INFO(bond
).rx_hashtbl_lock
));
313 static inline void _unlock_rx_hashtbl(struct bonding
*bond
)
315 spin_unlock(&(BOND_ALB_INFO(bond
).rx_hashtbl_lock
));
318 /* when an ARP REPLY is received from a client update its info
321 static void rlb_update_entry_from_arp(struct bonding
*bond
, struct arp_pkt
*arp
)
323 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
324 struct rlb_client_info
*client_info
;
327 _lock_rx_hashtbl_bh(bond
);
329 hash_index
= _simple_hash((u8
*)&(arp
->ip_src
), sizeof(arp
->ip_src
));
330 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
332 if ((client_info
->assigned
) &&
333 (client_info
->ip_src
== arp
->ip_dst
) &&
334 (client_info
->ip_dst
== arp
->ip_src
) &&
335 (!ether_addr_equal_64bits(client_info
->mac_dst
, arp
->mac_src
))) {
336 /* update the clients MAC address */
337 memcpy(client_info
->mac_dst
, arp
->mac_src
, ETH_ALEN
);
338 client_info
->ntt
= 1;
339 bond_info
->rx_ntt
= 1;
342 _unlock_rx_hashtbl_bh(bond
);
345 static int rlb_arp_recv(const struct sk_buff
*skb
, struct bonding
*bond
,
348 struct arp_pkt
*arp
, _arp
;
350 if (skb
->protocol
!= cpu_to_be16(ETH_P_ARP
))
353 arp
= skb_header_pointer(skb
, 0, sizeof(_arp
), &_arp
);
357 if (arp
->op_code
== htons(ARPOP_REPLY
)) {
358 /* update rx hash table for this ARP */
359 rlb_update_entry_from_arp(bond
, arp
);
360 pr_debug("Server received an ARP Reply from client\n");
363 return RX_HANDLER_ANOTHER
;
366 /* Caller must hold bond lock for read */
367 static struct slave
*rlb_next_rx_slave(struct bonding
*bond
)
369 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
370 struct slave
*rx_slave
, *slave
, *start_at
;
373 if (bond_info
->next_rx_slave
) {
374 start_at
= bond_info
->next_rx_slave
;
376 start_at
= bond
->first_slave
;
381 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
382 if (SLAVE_IS_OK(slave
)) {
385 } else if (slave
->speed
> rx_slave
->speed
) {
392 bond_info
->next_rx_slave
= rx_slave
->next
;
398 /* teach the switch the mac of a disabled slave
399 * on the primary for fault tolerance
401 * Caller must hold bond->curr_slave_lock for write or bond lock for write
403 static void rlb_teach_disabled_mac_on_primary(struct bonding
*bond
, u8 addr
[])
405 if (!bond
->curr_active_slave
) {
409 if (!bond
->alb_info
.primary_is_promisc
) {
410 if (!dev_set_promiscuity(bond
->curr_active_slave
->dev
, 1))
411 bond
->alb_info
.primary_is_promisc
= 1;
413 bond
->alb_info
.primary_is_promisc
= 0;
416 bond
->alb_info
.rlb_promisc_timeout_counter
= 0;
418 alb_send_learning_packets(bond
->curr_active_slave
, addr
);
421 /* slave being removed should not be active at this point
423 * Caller must hold bond lock for read
425 static void rlb_clear_slave(struct bonding
*bond
, struct slave
*slave
)
427 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
428 struct rlb_client_info
*rx_hash_table
;
429 u32 index
, next_index
;
431 /* clear slave from rx_hashtbl */
432 _lock_rx_hashtbl_bh(bond
);
434 rx_hash_table
= bond_info
->rx_hashtbl
;
435 index
= bond_info
->rx_hashtbl_head
;
436 for (; index
!= RLB_NULL_INDEX
; index
= next_index
) {
437 next_index
= rx_hash_table
[index
].next
;
438 if (rx_hash_table
[index
].slave
== slave
) {
439 struct slave
*assigned_slave
= rlb_next_rx_slave(bond
);
441 if (assigned_slave
) {
442 rx_hash_table
[index
].slave
= assigned_slave
;
443 if (!ether_addr_equal_64bits(rx_hash_table
[index
].mac_dst
,
445 bond_info
->rx_hashtbl
[index
].ntt
= 1;
446 bond_info
->rx_ntt
= 1;
447 /* A slave has been removed from the
448 * table because it is either disabled
449 * or being released. We must retry the
450 * update to avoid clients from not
451 * being updated & disconnecting when
454 bond_info
->rlb_update_retry_counter
=
457 } else { /* there is no active slave */
458 rx_hash_table
[index
].slave
= NULL
;
463 _unlock_rx_hashtbl_bh(bond
);
465 write_lock_bh(&bond
->curr_slave_lock
);
467 if (slave
!= bond
->curr_active_slave
) {
468 rlb_teach_disabled_mac_on_primary(bond
, slave
->dev
->dev_addr
);
471 write_unlock_bh(&bond
->curr_slave_lock
);
474 static void rlb_update_client(struct rlb_client_info
*client_info
)
478 if (!client_info
->slave
) {
482 for (i
= 0; i
< RLB_ARP_BURST_SIZE
; i
++) {
485 skb
= arp_create(ARPOP_REPLY
, ETH_P_ARP
,
487 client_info
->slave
->dev
,
489 client_info
->mac_dst
,
490 client_info
->slave
->dev
->dev_addr
,
491 client_info
->mac_dst
);
493 pr_err("%s: Error: failed to create an ARP packet\n",
494 client_info
->slave
->dev
->master
->name
);
498 skb
->dev
= client_info
->slave
->dev
;
500 if (client_info
->tag
) {
501 skb
= vlan_put_tag(skb
, client_info
->vlan_id
);
503 pr_err("%s: Error: failed to insert VLAN tag\n",
504 client_info
->slave
->dev
->master
->name
);
513 /* sends ARP REPLIES that update the clients that need updating */
514 static void rlb_update_rx_clients(struct bonding
*bond
)
516 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
517 struct rlb_client_info
*client_info
;
520 _lock_rx_hashtbl_bh(bond
);
522 hash_index
= bond_info
->rx_hashtbl_head
;
523 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
524 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
525 if (client_info
->ntt
) {
526 rlb_update_client(client_info
);
527 if (bond_info
->rlb_update_retry_counter
== 0) {
528 client_info
->ntt
= 0;
533 /* do not update the entries again until this counter is zero so that
534 * not to confuse the clients.
536 bond_info
->rlb_update_delay_counter
= RLB_UPDATE_DELAY
;
538 _unlock_rx_hashtbl_bh(bond
);
541 /* The slave was assigned a new mac address - update the clients */
542 static void rlb_req_update_slave_clients(struct bonding
*bond
, struct slave
*slave
)
544 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
545 struct rlb_client_info
*client_info
;
549 _lock_rx_hashtbl_bh(bond
);
551 hash_index
= bond_info
->rx_hashtbl_head
;
552 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
553 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
555 if ((client_info
->slave
== slave
) &&
556 !ether_addr_equal_64bits(client_info
->mac_dst
, mac_bcast
)) {
557 client_info
->ntt
= 1;
562 // update the team's flag only after the whole iteration
564 bond_info
->rx_ntt
= 1;
566 bond_info
->rlb_update_retry_counter
= RLB_UPDATE_RETRY
;
569 _unlock_rx_hashtbl_bh(bond
);
572 /* mark all clients using src_ip to be updated */
573 static void rlb_req_update_subnet_clients(struct bonding
*bond
, __be32 src_ip
)
575 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
576 struct rlb_client_info
*client_info
;
579 _lock_rx_hashtbl(bond
);
581 hash_index
= bond_info
->rx_hashtbl_head
;
582 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
583 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
585 if (!client_info
->slave
) {
586 pr_err("%s: Error: found a client with no channel in the client's hash table\n",
590 /*update all clients using this src_ip, that are not assigned
591 * to the team's address (curr_active_slave) and have a known
592 * unicast mac address.
594 if ((client_info
->ip_src
== src_ip
) &&
595 !ether_addr_equal_64bits(client_info
->slave
->dev
->dev_addr
,
596 bond
->dev
->dev_addr
) &&
597 !ether_addr_equal_64bits(client_info
->mac_dst
, mac_bcast
)) {
598 client_info
->ntt
= 1;
599 bond_info
->rx_ntt
= 1;
603 _unlock_rx_hashtbl(bond
);
606 /* Caller must hold both bond and ptr locks for read */
607 static struct slave
*rlb_choose_channel(struct sk_buff
*skb
, struct bonding
*bond
)
609 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
610 struct arp_pkt
*arp
= arp_pkt(skb
);
611 struct slave
*assigned_slave
;
612 struct rlb_client_info
*client_info
;
615 _lock_rx_hashtbl(bond
);
617 hash_index
= _simple_hash((u8
*)&arp
->ip_dst
, sizeof(arp
->ip_dst
));
618 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
620 if (client_info
->assigned
) {
621 if ((client_info
->ip_src
== arp
->ip_src
) &&
622 (client_info
->ip_dst
== arp
->ip_dst
)) {
623 /* the entry is already assigned to this client */
624 if (!ether_addr_equal_64bits(arp
->mac_dst
, mac_bcast
)) {
625 /* update mac address from arp */
626 memcpy(client_info
->mac_dst
, arp
->mac_dst
, ETH_ALEN
);
629 assigned_slave
= client_info
->slave
;
630 if (assigned_slave
) {
631 _unlock_rx_hashtbl(bond
);
632 return assigned_slave
;
635 /* the entry is already assigned to some other client,
636 * move the old client to primary (curr_active_slave) so
637 * that the new client can be assigned to this entry.
639 if (bond
->curr_active_slave
&&
640 client_info
->slave
!= bond
->curr_active_slave
) {
641 client_info
->slave
= bond
->curr_active_slave
;
642 rlb_update_client(client_info
);
646 /* assign a new slave */
647 assigned_slave
= rlb_next_rx_slave(bond
);
649 if (assigned_slave
) {
650 client_info
->ip_src
= arp
->ip_src
;
651 client_info
->ip_dst
= arp
->ip_dst
;
652 /* arp->mac_dst is broadcast for arp reqeusts.
653 * will be updated with clients actual unicast mac address
654 * upon receiving an arp reply.
656 memcpy(client_info
->mac_dst
, arp
->mac_dst
, ETH_ALEN
);
657 client_info
->slave
= assigned_slave
;
659 if (!ether_addr_equal_64bits(client_info
->mac_dst
, mac_bcast
)) {
660 client_info
->ntt
= 1;
661 bond
->alb_info
.rx_ntt
= 1;
663 client_info
->ntt
= 0;
666 if (bond_vlan_used(bond
)) {
667 if (!vlan_get_tag(skb
, &client_info
->vlan_id
))
668 client_info
->tag
= 1;
671 if (!client_info
->assigned
) {
672 u32 prev_tbl_head
= bond_info
->rx_hashtbl_head
;
673 bond_info
->rx_hashtbl_head
= hash_index
;
674 client_info
->next
= prev_tbl_head
;
675 if (prev_tbl_head
!= RLB_NULL_INDEX
) {
676 bond_info
->rx_hashtbl
[prev_tbl_head
].prev
=
679 client_info
->assigned
= 1;
683 _unlock_rx_hashtbl(bond
);
685 return assigned_slave
;
688 /* chooses (and returns) transmit channel for arp reply
689 * does not choose channel for other arp types since they are
690 * sent on the curr_active_slave
692 static struct slave
*rlb_arp_xmit(struct sk_buff
*skb
, struct bonding
*bond
)
694 struct arp_pkt
*arp
= arp_pkt(skb
);
695 struct slave
*tx_slave
= NULL
;
697 if (arp
->op_code
== htons(ARPOP_REPLY
)) {
698 /* the arp must be sent on the selected
701 tx_slave
= rlb_choose_channel(skb
, bond
);
703 memcpy(arp
->mac_src
,tx_slave
->dev
->dev_addr
, ETH_ALEN
);
705 pr_debug("Server sent ARP Reply packet\n");
706 } else if (arp
->op_code
== htons(ARPOP_REQUEST
)) {
707 /* Create an entry in the rx_hashtbl for this client as a
709 * When the arp reply is received the entry will be updated
710 * with the correct unicast address of the client.
712 rlb_choose_channel(skb
, bond
);
714 /* The ARP reply packets must be delayed so that
715 * they can cancel out the influence of the ARP request.
717 bond
->alb_info
.rlb_update_delay_counter
= RLB_UPDATE_DELAY
;
719 /* arp requests are broadcast and are sent on the primary
720 * the arp request will collapse all clients on the subnet to
721 * the primary slave. We must register these clients to be
722 * updated with their assigned mac.
724 rlb_req_update_subnet_clients(bond
, arp
->ip_src
);
725 pr_debug("Server sent ARP Request packet\n");
731 /* Caller must hold bond lock for read */
732 static void rlb_rebalance(struct bonding
*bond
)
734 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
735 struct slave
*assigned_slave
;
736 struct rlb_client_info
*client_info
;
740 _lock_rx_hashtbl_bh(bond
);
743 hash_index
= bond_info
->rx_hashtbl_head
;
744 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
745 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
746 assigned_slave
= rlb_next_rx_slave(bond
);
747 if (assigned_slave
&& (client_info
->slave
!= assigned_slave
)) {
748 client_info
->slave
= assigned_slave
;
749 client_info
->ntt
= 1;
754 /* update the team's flag only after the whole iteration */
756 bond_info
->rx_ntt
= 1;
758 _unlock_rx_hashtbl_bh(bond
);
761 /* Caller must hold rx_hashtbl lock */
762 static void rlb_init_table_entry(struct rlb_client_info
*entry
)
764 memset(entry
, 0, sizeof(struct rlb_client_info
));
765 entry
->next
= RLB_NULL_INDEX
;
766 entry
->prev
= RLB_NULL_INDEX
;
769 static int rlb_initialize(struct bonding
*bond
)
771 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
772 struct rlb_client_info
*new_hashtbl
;
773 int size
= RLB_HASH_TABLE_SIZE
* sizeof(struct rlb_client_info
);
776 new_hashtbl
= kmalloc(size
, GFP_KERNEL
);
780 _lock_rx_hashtbl_bh(bond
);
782 bond_info
->rx_hashtbl
= new_hashtbl
;
784 bond_info
->rx_hashtbl_head
= RLB_NULL_INDEX
;
786 for (i
= 0; i
< RLB_HASH_TABLE_SIZE
; i
++) {
787 rlb_init_table_entry(bond_info
->rx_hashtbl
+ i
);
790 _unlock_rx_hashtbl_bh(bond
);
792 /* register to receive ARPs */
793 bond
->recv_probe
= rlb_arp_recv
;
798 static void rlb_deinitialize(struct bonding
*bond
)
800 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
802 _lock_rx_hashtbl_bh(bond
);
804 kfree(bond_info
->rx_hashtbl
);
805 bond_info
->rx_hashtbl
= NULL
;
806 bond_info
->rx_hashtbl_head
= RLB_NULL_INDEX
;
808 _unlock_rx_hashtbl_bh(bond
);
811 static void rlb_clear_vlan(struct bonding
*bond
, unsigned short vlan_id
)
813 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
816 _lock_rx_hashtbl_bh(bond
);
818 curr_index
= bond_info
->rx_hashtbl_head
;
819 while (curr_index
!= RLB_NULL_INDEX
) {
820 struct rlb_client_info
*curr
= &(bond_info
->rx_hashtbl
[curr_index
]);
821 u32 next_index
= bond_info
->rx_hashtbl
[curr_index
].next
;
822 u32 prev_index
= bond_info
->rx_hashtbl
[curr_index
].prev
;
824 if (curr
->tag
&& (curr
->vlan_id
== vlan_id
)) {
825 if (curr_index
== bond_info
->rx_hashtbl_head
) {
826 bond_info
->rx_hashtbl_head
= next_index
;
828 if (prev_index
!= RLB_NULL_INDEX
) {
829 bond_info
->rx_hashtbl
[prev_index
].next
= next_index
;
831 if (next_index
!= RLB_NULL_INDEX
) {
832 bond_info
->rx_hashtbl
[next_index
].prev
= prev_index
;
835 rlb_init_table_entry(curr
);
838 curr_index
= next_index
;
841 _unlock_rx_hashtbl_bh(bond
);
844 /*********************** tlb/rlb shared functions *********************/
846 static void alb_send_learning_packets(struct slave
*slave
, u8 mac_addr
[])
848 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
849 struct learning_pkt pkt
;
850 int size
= sizeof(struct learning_pkt
);
853 memset(&pkt
, 0, size
);
854 memcpy(pkt
.mac_dst
, mac_addr
, ETH_ALEN
);
855 memcpy(pkt
.mac_src
, mac_addr
, ETH_ALEN
);
856 pkt
.type
= cpu_to_be16(ETH_P_LOOP
);
858 for (i
= 0; i
< MAX_LP_BURST
; i
++) {
862 skb
= dev_alloc_skb(size
);
867 data
= skb_put(skb
, size
);
868 memcpy(data
, &pkt
, size
);
870 skb_reset_mac_header(skb
);
871 skb
->network_header
= skb
->mac_header
+ ETH_HLEN
;
872 skb
->protocol
= pkt
.type
;
873 skb
->priority
= TC_PRIO_CONTROL
;
874 skb
->dev
= slave
->dev
;
876 if (bond_vlan_used(bond
)) {
877 struct vlan_entry
*vlan
;
879 vlan
= bond_next_vlan(bond
,
880 bond
->alb_info
.current_alb_vlan
);
882 bond
->alb_info
.current_alb_vlan
= vlan
;
888 skb
= vlan_put_tag(skb
, vlan
->vlan_id
);
890 pr_err("%s: Error: failed to insert VLAN tag\n",
900 static int alb_set_slave_mac_addr(struct slave
*slave
, u8 addr
[])
902 struct net_device
*dev
= slave
->dev
;
903 struct sockaddr s_addr
;
905 if (slave
->bond
->params
.mode
== BOND_MODE_TLB
) {
906 memcpy(dev
->dev_addr
, addr
, dev
->addr_len
);
910 /* for rlb each slave must have a unique hw mac addresses so that */
911 /* each slave will receive packets destined to a different mac */
912 memcpy(s_addr
.sa_data
, addr
, dev
->addr_len
);
913 s_addr
.sa_family
= dev
->type
;
914 if (dev_set_mac_address(dev
, &s_addr
)) {
915 pr_err("%s: Error: dev_set_mac_address of dev %s failed!\n"
916 "ALB mode requires that the base driver support setting the hw address also when the network device's interface is open\n",
917 dev
->master
->name
, dev
->name
);
924 * Swap MAC addresses between two slaves.
926 * Called with RTNL held, and no other locks.
930 static void alb_swap_mac_addr(struct bonding
*bond
, struct slave
*slave1
, struct slave
*slave2
)
932 u8 tmp_mac_addr
[ETH_ALEN
];
934 memcpy(tmp_mac_addr
, slave1
->dev
->dev_addr
, ETH_ALEN
);
935 alb_set_slave_mac_addr(slave1
, slave2
->dev
->dev_addr
);
936 alb_set_slave_mac_addr(slave2
, tmp_mac_addr
);
941 * Send learning packets after MAC address swap.
943 * Called with RTNL and no other locks
945 static void alb_fasten_mac_swap(struct bonding
*bond
, struct slave
*slave1
,
946 struct slave
*slave2
)
948 int slaves_state_differ
= (SLAVE_IS_OK(slave1
) != SLAVE_IS_OK(slave2
));
949 struct slave
*disabled_slave
= NULL
;
953 /* fasten the change in the switch */
954 if (SLAVE_IS_OK(slave1
)) {
955 alb_send_learning_packets(slave1
, slave1
->dev
->dev_addr
);
956 if (bond
->alb_info
.rlb_enabled
) {
957 /* inform the clients that the mac address
960 rlb_req_update_slave_clients(bond
, slave1
);
963 disabled_slave
= slave1
;
966 if (SLAVE_IS_OK(slave2
)) {
967 alb_send_learning_packets(slave2
, slave2
->dev
->dev_addr
);
968 if (bond
->alb_info
.rlb_enabled
) {
969 /* inform the clients that the mac address
972 rlb_req_update_slave_clients(bond
, slave2
);
975 disabled_slave
= slave2
;
978 if (bond
->alb_info
.rlb_enabled
&& slaves_state_differ
) {
979 /* A disabled slave was assigned an active mac addr */
980 rlb_teach_disabled_mac_on_primary(bond
,
981 disabled_slave
->dev
->dev_addr
);
986 * alb_change_hw_addr_on_detach
987 * @bond: bonding we're working on
988 * @slave: the slave that was just detached
990 * We assume that @slave was already detached from the slave list.
992 * If @slave's permanent hw address is different both from its current
993 * address and from @bond's address, then somewhere in the bond there's
994 * a slave that has @slave's permanet address as its current address.
995 * We'll make sure that that slave no longer uses @slave's permanent address.
997 * Caller must hold RTNL and no other locks
999 static void alb_change_hw_addr_on_detach(struct bonding
*bond
, struct slave
*slave
)
1004 perm_curr_diff
= !ether_addr_equal_64bits(slave
->perm_hwaddr
,
1005 slave
->dev
->dev_addr
);
1006 perm_bond_diff
= !ether_addr_equal_64bits(slave
->perm_hwaddr
,
1007 bond
->dev
->dev_addr
);
1009 if (perm_curr_diff
&& perm_bond_diff
) {
1010 struct slave
*tmp_slave
;
1013 bond_for_each_slave(bond
, tmp_slave
, i
) {
1014 if (ether_addr_equal_64bits(slave
->perm_hwaddr
,
1015 tmp_slave
->dev
->dev_addr
)) {
1022 /* locking: needs RTNL and nothing else */
1023 alb_swap_mac_addr(bond
, slave
, tmp_slave
);
1024 alb_fasten_mac_swap(bond
, slave
, tmp_slave
);
1030 * alb_handle_addr_collision_on_attach
1031 * @bond: bonding we're working on
1032 * @slave: the slave that was just attached
1034 * checks uniqueness of slave's mac address and handles the case the
1035 * new slave uses the bonds mac address.
1037 * If the permanent hw address of @slave is @bond's hw address, we need to
1038 * find a different hw address to give @slave, that isn't in use by any other
1039 * slave in the bond. This address must be, of course, one of the permanent
1040 * addresses of the other slaves.
1042 * We go over the slave list, and for each slave there we compare its
1043 * permanent hw address with the current address of all the other slaves.
1044 * If no match was found, then we've found a slave with a permanent address
1045 * that isn't used by any other slave in the bond, so we can assign it to
1048 * assumption: this function is called before @slave is attached to the
1051 * caller must hold the bond lock for write since the mac addresses are compared
1052 * and may be swapped.
1054 static int alb_handle_addr_collision_on_attach(struct bonding
*bond
, struct slave
*slave
)
1056 struct slave
*tmp_slave1
, *tmp_slave2
, *free_mac_slave
;
1057 struct slave
*has_bond_addr
= bond
->curr_active_slave
;
1058 int i
, j
, found
= 0;
1060 if (bond
->slave_cnt
== 0) {
1061 /* this is the first slave */
1065 /* if slave's mac address differs from bond's mac address
1066 * check uniqueness of slave's mac address against the other
1067 * slaves in the bond.
1069 if (!ether_addr_equal_64bits(slave
->perm_hwaddr
, bond
->dev
->dev_addr
)) {
1070 bond_for_each_slave(bond
, tmp_slave1
, i
) {
1071 if (ether_addr_equal_64bits(tmp_slave1
->dev
->dev_addr
,
1072 slave
->dev
->dev_addr
)) {
1081 /* Try setting slave mac to bond address and fall-through
1082 to code handling that situation below... */
1083 alb_set_slave_mac_addr(slave
, bond
->dev
->dev_addr
);
1086 /* The slave's address is equal to the address of the bond.
1087 * Search for a spare address in the bond for this slave.
1089 free_mac_slave
= NULL
;
1091 bond_for_each_slave(bond
, tmp_slave1
, i
) {
1093 bond_for_each_slave(bond
, tmp_slave2
, j
) {
1094 if (ether_addr_equal_64bits(tmp_slave1
->perm_hwaddr
,
1095 tmp_slave2
->dev
->dev_addr
)) {
1102 /* no slave has tmp_slave1's perm addr
1105 free_mac_slave
= tmp_slave1
;
1109 if (!has_bond_addr
) {
1110 if (ether_addr_equal_64bits(tmp_slave1
->dev
->dev_addr
,
1111 bond
->dev
->dev_addr
)) {
1113 has_bond_addr
= tmp_slave1
;
1118 if (free_mac_slave
) {
1119 alb_set_slave_mac_addr(slave
, free_mac_slave
->perm_hwaddr
);
1121 pr_warning("%s: Warning: the hw address of slave %s is in use by the bond; giving it the hw address of %s\n",
1122 bond
->dev
->name
, slave
->dev
->name
,
1123 free_mac_slave
->dev
->name
);
1125 } else if (has_bond_addr
) {
1126 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",
1127 bond
->dev
->name
, slave
->dev
->name
);
1135 * alb_set_mac_address
1139 * In TLB mode all slaves are configured to the bond's hw address, but set
1140 * their dev_addr field to different addresses (based on their permanent hw
1143 * For each slave, this function sets the interface to the new address and then
1144 * changes its dev_addr field to its previous value.
1146 * Unwinding assumes bond's mac address has not yet changed.
1148 static int alb_set_mac_address(struct bonding
*bond
, void *addr
)
1151 struct slave
*slave
, *stop_at
;
1152 char tmp_addr
[ETH_ALEN
];
1156 if (bond
->alb_info
.rlb_enabled
) {
1160 bond_for_each_slave(bond
, slave
, i
) {
1161 /* save net_device's current hw address */
1162 memcpy(tmp_addr
, slave
->dev
->dev_addr
, ETH_ALEN
);
1164 res
= dev_set_mac_address(slave
->dev
, addr
);
1166 /* restore net_device's hw address */
1167 memcpy(slave
->dev
->dev_addr
, tmp_addr
, ETH_ALEN
);
1176 memcpy(sa
.sa_data
, bond
->dev
->dev_addr
, bond
->dev
->addr_len
);
1177 sa
.sa_family
= bond
->dev
->type
;
1179 /* unwind from head to the slave that failed */
1181 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
1182 memcpy(tmp_addr
, slave
->dev
->dev_addr
, ETH_ALEN
);
1183 dev_set_mac_address(slave
->dev
, &sa
);
1184 memcpy(slave
->dev
->dev_addr
, tmp_addr
, ETH_ALEN
);
1190 /************************ exported alb funcions ************************/
1192 int bond_alb_initialize(struct bonding
*bond
, int rlb_enabled
)
1196 res
= tlb_initialize(bond
);
1202 bond
->alb_info
.rlb_enabled
= 1;
1203 /* initialize rlb */
1204 res
= rlb_initialize(bond
);
1206 tlb_deinitialize(bond
);
1210 bond
->alb_info
.rlb_enabled
= 0;
1216 void bond_alb_deinitialize(struct bonding
*bond
)
1218 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1220 tlb_deinitialize(bond
);
1222 if (bond_info
->rlb_enabled
) {
1223 rlb_deinitialize(bond
);
1227 int bond_alb_xmit(struct sk_buff
*skb
, struct net_device
*bond_dev
)
1229 struct bonding
*bond
= netdev_priv(bond_dev
);
1230 struct ethhdr
*eth_data
;
1231 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1232 struct slave
*tx_slave
= NULL
;
1233 static const __be32 ip_bcast
= htonl(0xffffffff);
1235 int do_tx_balance
= 1;
1237 const u8
*hash_start
= NULL
;
1239 struct ipv6hdr
*ip6hdr
;
1241 skb_reset_mac_header(skb
);
1242 eth_data
= eth_hdr(skb
);
1244 /* make sure that the curr_active_slave do not change during tx
1246 read_lock(&bond
->curr_slave_lock
);
1248 switch (ntohs(skb
->protocol
)) {
1250 const struct iphdr
*iph
= ip_hdr(skb
);
1252 if (ether_addr_equal_64bits(eth_data
->h_dest
, mac_bcast
) ||
1253 (iph
->daddr
== ip_bcast
) ||
1254 (iph
->protocol
== IPPROTO_IGMP
)) {
1258 hash_start
= (char *)&(iph
->daddr
);
1259 hash_size
= sizeof(iph
->daddr
);
1263 /* IPv6 doesn't really use broadcast mac address, but leave
1264 * that here just in case.
1266 if (ether_addr_equal_64bits(eth_data
->h_dest
, mac_bcast
)) {
1271 /* IPv6 uses all-nodes multicast as an equivalent to
1272 * broadcasts in IPv4.
1274 if (ether_addr_equal_64bits(eth_data
->h_dest
, mac_v6_allmcast
)) {
1279 /* Additianally, DAD probes should not be tx-balanced as that
1280 * will lead to false positives for duplicate addresses and
1281 * prevent address configuration from working.
1283 ip6hdr
= ipv6_hdr(skb
);
1284 if (ipv6_addr_any(&ip6hdr
->saddr
)) {
1289 hash_start
= (char *)&(ipv6_hdr(skb
)->daddr
);
1290 hash_size
= sizeof(ipv6_hdr(skb
)->daddr
);
1293 if (ipx_hdr(skb
)->ipx_checksum
!= IPX_NO_CHECKSUM
) {
1294 /* something is wrong with this packet */
1299 if (ipx_hdr(skb
)->ipx_type
!= IPX_TYPE_NCP
) {
1300 /* The only protocol worth balancing in
1301 * this family since it has an "ARP" like
1308 hash_start
= (char*)eth_data
->h_dest
;
1309 hash_size
= ETH_ALEN
;
1313 if (bond_info
->rlb_enabled
) {
1314 tx_slave
= rlb_arp_xmit(skb
, bond
);
1322 if (do_tx_balance
) {
1323 hash_index
= _simple_hash(hash_start
, hash_size
);
1324 tx_slave
= tlb_choose_channel(bond
, hash_index
, skb
->len
);
1328 /* unbalanced or unassigned, send through primary */
1329 tx_slave
= bond
->curr_active_slave
;
1330 bond_info
->unbalanced_load
+= skb
->len
;
1333 if (tx_slave
&& SLAVE_IS_OK(tx_slave
)) {
1334 if (tx_slave
!= bond
->curr_active_slave
) {
1335 memcpy(eth_data
->h_source
,
1336 tx_slave
->dev
->dev_addr
,
1340 res
= bond_dev_queue_xmit(bond
, skb
, tx_slave
->dev
);
1343 _lock_tx_hashtbl(bond
);
1344 __tlb_clear_slave(bond
, tx_slave
, 0);
1345 _unlock_tx_hashtbl(bond
);
1349 read_unlock(&bond
->curr_slave_lock
);
1352 /* no suitable interface, frame not sent */
1355 return NETDEV_TX_OK
;
1358 void bond_alb_monitor(struct work_struct
*work
)
1360 struct bonding
*bond
= container_of(work
, struct bonding
,
1362 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1363 struct slave
*slave
;
1366 read_lock(&bond
->lock
);
1368 if (bond
->slave_cnt
== 0) {
1369 bond_info
->tx_rebalance_counter
= 0;
1370 bond_info
->lp_counter
= 0;
1374 bond_info
->tx_rebalance_counter
++;
1375 bond_info
->lp_counter
++;
1377 /* send learning packets */
1378 if (bond_info
->lp_counter
>= BOND_ALB_LP_TICKS
) {
1379 /* change of curr_active_slave involves swapping of mac addresses.
1380 * in order to avoid this swapping from happening while
1381 * sending the learning packets, the curr_slave_lock must be held for
1384 read_lock(&bond
->curr_slave_lock
);
1386 bond_for_each_slave(bond
, slave
, i
) {
1387 alb_send_learning_packets(slave
, slave
->dev
->dev_addr
);
1390 read_unlock(&bond
->curr_slave_lock
);
1392 bond_info
->lp_counter
= 0;
1395 /* rebalance tx traffic */
1396 if (bond_info
->tx_rebalance_counter
>= BOND_TLB_REBALANCE_TICKS
) {
1398 read_lock(&bond
->curr_slave_lock
);
1400 bond_for_each_slave(bond
, slave
, i
) {
1401 tlb_clear_slave(bond
, slave
, 1);
1402 if (slave
== bond
->curr_active_slave
) {
1403 SLAVE_TLB_INFO(slave
).load
=
1404 bond_info
->unbalanced_load
/
1405 BOND_TLB_REBALANCE_INTERVAL
;
1406 bond_info
->unbalanced_load
= 0;
1410 read_unlock(&bond
->curr_slave_lock
);
1412 bond_info
->tx_rebalance_counter
= 0;
1415 /* handle rlb stuff */
1416 if (bond_info
->rlb_enabled
) {
1417 if (bond_info
->primary_is_promisc
&&
1418 (++bond_info
->rlb_promisc_timeout_counter
>= RLB_PROMISC_TIMEOUT
)) {
1421 * dev_set_promiscuity requires rtnl and
1422 * nothing else. Avoid race with bond_close.
1424 read_unlock(&bond
->lock
);
1425 if (!rtnl_trylock()) {
1426 read_lock(&bond
->lock
);
1430 bond_info
->rlb_promisc_timeout_counter
= 0;
1432 /* If the primary was set to promiscuous mode
1433 * because a slave was disabled then
1434 * it can now leave promiscuous mode.
1436 dev_set_promiscuity(bond
->curr_active_slave
->dev
, -1);
1437 bond_info
->primary_is_promisc
= 0;
1440 read_lock(&bond
->lock
);
1443 if (bond_info
->rlb_rebalance
) {
1444 bond_info
->rlb_rebalance
= 0;
1445 rlb_rebalance(bond
);
1448 /* check if clients need updating */
1449 if (bond_info
->rx_ntt
) {
1450 if (bond_info
->rlb_update_delay_counter
) {
1451 --bond_info
->rlb_update_delay_counter
;
1453 rlb_update_rx_clients(bond
);
1454 if (bond_info
->rlb_update_retry_counter
) {
1455 --bond_info
->rlb_update_retry_counter
;
1457 bond_info
->rx_ntt
= 0;
1464 queue_delayed_work(bond
->wq
, &bond
->alb_work
, alb_delta_in_ticks
);
1466 read_unlock(&bond
->lock
);
1469 /* assumption: called before the slave is attached to the bond
1470 * and not locked by the bond lock
1472 int bond_alb_init_slave(struct bonding
*bond
, struct slave
*slave
)
1476 res
= alb_set_slave_mac_addr(slave
, slave
->perm_hwaddr
);
1481 /* caller must hold the bond lock for write since the mac addresses
1482 * are compared and may be swapped.
1484 read_lock(&bond
->lock
);
1486 res
= alb_handle_addr_collision_on_attach(bond
, slave
);
1488 read_unlock(&bond
->lock
);
1494 tlb_init_slave(slave
);
1496 /* order a rebalance ASAP */
1497 bond
->alb_info
.tx_rebalance_counter
= BOND_TLB_REBALANCE_TICKS
;
1499 if (bond
->alb_info
.rlb_enabled
) {
1500 bond
->alb_info
.rlb_rebalance
= 1;
1507 * Remove slave from tlb and rlb hash tables, and fix up MAC addresses
1510 * Caller must hold RTNL and no other locks
1512 void bond_alb_deinit_slave(struct bonding
*bond
, struct slave
*slave
)
1514 if (bond
->slave_cnt
> 1) {
1515 alb_change_hw_addr_on_detach(bond
, slave
);
1518 tlb_clear_slave(bond
, slave
, 0);
1520 if (bond
->alb_info
.rlb_enabled
) {
1521 bond
->alb_info
.next_rx_slave
= NULL
;
1522 rlb_clear_slave(bond
, slave
);
1526 /* Caller must hold bond lock for read */
1527 void bond_alb_handle_link_change(struct bonding
*bond
, struct slave
*slave
, char link
)
1529 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1531 if (link
== BOND_LINK_DOWN
) {
1532 tlb_clear_slave(bond
, slave
, 0);
1533 if (bond
->alb_info
.rlb_enabled
) {
1534 rlb_clear_slave(bond
, slave
);
1536 } else if (link
== BOND_LINK_UP
) {
1537 /* order a rebalance ASAP */
1538 bond_info
->tx_rebalance_counter
= BOND_TLB_REBALANCE_TICKS
;
1539 if (bond
->alb_info
.rlb_enabled
) {
1540 bond
->alb_info
.rlb_rebalance
= 1;
1541 /* If the updelay module parameter is smaller than the
1542 * forwarding delay of the switch the rebalance will
1543 * not work because the rebalance arp replies will
1544 * not be forwarded to the clients..
1551 * bond_alb_handle_active_change - assign new curr_active_slave
1552 * @bond: our bonding struct
1553 * @new_slave: new slave to assign
1555 * Set the bond->curr_active_slave to @new_slave and handle
1556 * mac address swapping and promiscuity changes as needed.
1558 * If new_slave is NULL, caller must hold curr_slave_lock or
1559 * bond->lock for write.
1561 * If new_slave is not NULL, caller must hold RTNL, bond->lock for
1562 * read and curr_slave_lock for write. Processing here may sleep, so
1563 * no other locks may be held.
1565 void bond_alb_handle_active_change(struct bonding
*bond
, struct slave
*new_slave
)
1566 __releases(&bond
->curr_slave_lock
)
1567 __releases(&bond
->lock
)
1568 __acquires(&bond
->lock
)
1569 __acquires(&bond
->curr_slave_lock
)
1571 struct slave
*swap_slave
;
1574 if (bond
->curr_active_slave
== new_slave
) {
1578 if (bond
->curr_active_slave
&& bond
->alb_info
.primary_is_promisc
) {
1579 dev_set_promiscuity(bond
->curr_active_slave
->dev
, -1);
1580 bond
->alb_info
.primary_is_promisc
= 0;
1581 bond
->alb_info
.rlb_promisc_timeout_counter
= 0;
1584 swap_slave
= bond
->curr_active_slave
;
1585 bond
->curr_active_slave
= new_slave
;
1587 if (!new_slave
|| (bond
->slave_cnt
== 0)) {
1591 /* set the new curr_active_slave to the bonds mac address
1592 * i.e. swap mac addresses of old curr_active_slave and new curr_active_slave
1595 struct slave
*tmp_slave
;
1596 /* find slave that is holding the bond's mac address */
1597 bond_for_each_slave(bond
, tmp_slave
, i
) {
1598 if (ether_addr_equal_64bits(tmp_slave
->dev
->dev_addr
,
1599 bond
->dev
->dev_addr
)) {
1600 swap_slave
= tmp_slave
;
1607 * Arrange for swap_slave and new_slave to temporarily be
1608 * ignored so we can mess with their MAC addresses without
1609 * fear of interference from transmit activity.
1612 tlb_clear_slave(bond
, swap_slave
, 1);
1614 tlb_clear_slave(bond
, new_slave
, 1);
1616 write_unlock_bh(&bond
->curr_slave_lock
);
1617 read_unlock(&bond
->lock
);
1621 /* curr_active_slave must be set before calling alb_swap_mac_addr */
1623 /* swap mac address */
1624 alb_swap_mac_addr(bond
, swap_slave
, new_slave
);
1626 /* set the new_slave to the bond mac address */
1627 alb_set_slave_mac_addr(new_slave
, bond
->dev
->dev_addr
);
1631 alb_fasten_mac_swap(bond
, swap_slave
, new_slave
);
1632 read_lock(&bond
->lock
);
1634 read_lock(&bond
->lock
);
1635 alb_send_learning_packets(new_slave
, bond
->dev
->dev_addr
);
1638 write_lock_bh(&bond
->curr_slave_lock
);
1644 int bond_alb_set_mac_address(struct net_device
*bond_dev
, void *addr
)
1645 __acquires(&bond
->lock
)
1646 __releases(&bond
->lock
)
1648 struct bonding
*bond
= netdev_priv(bond_dev
);
1649 struct sockaddr
*sa
= addr
;
1650 struct slave
*slave
, *swap_slave
;
1654 if (!is_valid_ether_addr(sa
->sa_data
)) {
1655 return -EADDRNOTAVAIL
;
1658 res
= alb_set_mac_address(bond
, addr
);
1663 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
1665 /* If there is no curr_active_slave there is nothing else to do.
1666 * Otherwise we'll need to pass the new address to it and handle
1669 if (!bond
->curr_active_slave
) {
1675 bond_for_each_slave(bond
, slave
, i
) {
1676 if (ether_addr_equal_64bits(slave
->dev
->dev_addr
,
1677 bond_dev
->dev_addr
)) {
1684 alb_swap_mac_addr(bond
, swap_slave
, bond
->curr_active_slave
);
1685 alb_fasten_mac_swap(bond
, swap_slave
, bond
->curr_active_slave
);
1687 alb_set_slave_mac_addr(bond
->curr_active_slave
, bond_dev
->dev_addr
);
1689 read_lock(&bond
->lock
);
1690 alb_send_learning_packets(bond
->curr_active_slave
, bond_dev
->dev_addr
);
1691 if (bond
->alb_info
.rlb_enabled
) {
1692 /* inform clients mac address has changed */
1693 rlb_req_update_slave_clients(bond
, bond
->curr_active_slave
);
1695 read_unlock(&bond
->lock
);
1701 void bond_alb_clear_vlan(struct bonding
*bond
, unsigned short vlan_id
)
1703 if (bond
->alb_info
.current_alb_vlan
&&
1704 (bond
->alb_info
.current_alb_vlan
->vlan_id
== vlan_id
)) {
1705 bond
->alb_info
.current_alb_vlan
= NULL
;
1708 if (bond
->alb_info
.rlb_enabled
) {
1709 rlb_clear_vlan(bond
, vlan_id
);