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 (compare_ether_addr_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(struct sk_buff
*skb
, struct bonding
*bond
,
350 if (skb
->protocol
!= cpu_to_be16(ETH_P_ARP
))
353 arp
= (struct arp_pkt
*) skb
->data
;
355 pr_debug("Packet has no ARP data\n");
359 if (!pskb_may_pull(skb
, arp_hdr_len(bond
->dev
)))
362 if (skb
->len
< sizeof(struct arp_pkt
)) {
363 pr_debug("Packet is too small to be an ARP\n");
367 if (arp
->op_code
== htons(ARPOP_REPLY
)) {
368 /* update rx hash table for this ARP */
369 rlb_update_entry_from_arp(bond
, arp
);
370 pr_debug("Server received an ARP Reply from client\n");
373 return RX_HANDLER_ANOTHER
;
376 /* Caller must hold bond lock for read */
377 static struct slave
*rlb_next_rx_slave(struct bonding
*bond
)
379 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
380 struct slave
*rx_slave
, *slave
, *start_at
;
383 if (bond_info
->next_rx_slave
) {
384 start_at
= bond_info
->next_rx_slave
;
386 start_at
= bond
->first_slave
;
391 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
392 if (SLAVE_IS_OK(slave
)) {
395 } else if (slave
->speed
> rx_slave
->speed
) {
402 bond_info
->next_rx_slave
= rx_slave
->next
;
408 /* teach the switch the mac of a disabled slave
409 * on the primary for fault tolerance
411 * Caller must hold bond->curr_slave_lock for write or bond lock for write
413 static void rlb_teach_disabled_mac_on_primary(struct bonding
*bond
, u8 addr
[])
415 if (!bond
->curr_active_slave
) {
419 if (!bond
->alb_info
.primary_is_promisc
) {
420 if (!dev_set_promiscuity(bond
->curr_active_slave
->dev
, 1))
421 bond
->alb_info
.primary_is_promisc
= 1;
423 bond
->alb_info
.primary_is_promisc
= 0;
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_bh(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 (compare_ether_addr_64bits(rx_hash_table
[index
].mac_dst
,
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_bh(bond
);
475 write_lock_bh(&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_bh(&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 pr_err("%s: Error: failed to create an ARP packet\n",
504 client_info
->slave
->dev
->master
->name
);
508 skb
->dev
= client_info
->slave
->dev
;
510 if (client_info
->tag
) {
511 skb
= vlan_put_tag(skb
, client_info
->vlan_id
);
513 pr_err("%s: Error: failed to insert VLAN tag\n",
514 client_info
->slave
->dev
->master
->name
);
523 /* sends ARP REPLIES that update the clients that need updating */
524 static void rlb_update_rx_clients(struct bonding
*bond
)
526 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
527 struct rlb_client_info
*client_info
;
530 _lock_rx_hashtbl_bh(bond
);
532 hash_index
= bond_info
->rx_hashtbl_head
;
533 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
534 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
535 if (client_info
->ntt
) {
536 rlb_update_client(client_info
);
537 if (bond_info
->rlb_update_retry_counter
== 0) {
538 client_info
->ntt
= 0;
543 /* do not update the entries again until this counter is zero so that
544 * not to confuse the clients.
546 bond_info
->rlb_update_delay_counter
= RLB_UPDATE_DELAY
;
548 _unlock_rx_hashtbl_bh(bond
);
551 /* The slave was assigned a new mac address - update the clients */
552 static void rlb_req_update_slave_clients(struct bonding
*bond
, struct slave
*slave
)
554 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
555 struct rlb_client_info
*client_info
;
559 _lock_rx_hashtbl_bh(bond
);
561 hash_index
= bond_info
->rx_hashtbl_head
;
562 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
563 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
565 if ((client_info
->slave
== slave
) &&
566 compare_ether_addr_64bits(client_info
->mac_dst
, mac_bcast
)) {
567 client_info
->ntt
= 1;
572 // update the team's flag only after the whole iteration
574 bond_info
->rx_ntt
= 1;
576 bond_info
->rlb_update_retry_counter
= RLB_UPDATE_RETRY
;
579 _unlock_rx_hashtbl_bh(bond
);
582 /* mark all clients using src_ip to be updated */
583 static void rlb_req_update_subnet_clients(struct bonding
*bond
, __be32 src_ip
)
585 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
586 struct rlb_client_info
*client_info
;
589 _lock_rx_hashtbl(bond
);
591 hash_index
= bond_info
->rx_hashtbl_head
;
592 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
593 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
595 if (!client_info
->slave
) {
596 pr_err("%s: Error: found a client with no channel in the client's hash table\n",
600 /*update all clients using this src_ip, that are not assigned
601 * to the team's address (curr_active_slave) and have a known
602 * unicast mac address.
604 if ((client_info
->ip_src
== src_ip
) &&
605 compare_ether_addr_64bits(client_info
->slave
->dev
->dev_addr
,
606 bond
->dev
->dev_addr
) &&
607 compare_ether_addr_64bits(client_info
->mac_dst
, mac_bcast
)) {
608 client_info
->ntt
= 1;
609 bond_info
->rx_ntt
= 1;
613 _unlock_rx_hashtbl(bond
);
616 /* Caller must hold both bond and ptr locks for read */
617 static struct slave
*rlb_choose_channel(struct sk_buff
*skb
, struct bonding
*bond
)
619 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
620 struct arp_pkt
*arp
= arp_pkt(skb
);
621 struct slave
*assigned_slave
;
622 struct rlb_client_info
*client_info
;
625 _lock_rx_hashtbl(bond
);
627 hash_index
= _simple_hash((u8
*)&arp
->ip_dst
, sizeof(arp
->ip_dst
));
628 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
630 if (client_info
->assigned
) {
631 if ((client_info
->ip_src
== arp
->ip_src
) &&
632 (client_info
->ip_dst
== arp
->ip_dst
)) {
633 /* the entry is already assigned to this client */
634 if (compare_ether_addr_64bits(arp
->mac_dst
, mac_bcast
)) {
635 /* update mac address from arp */
636 memcpy(client_info
->mac_dst
, arp
->mac_dst
, ETH_ALEN
);
639 assigned_slave
= client_info
->slave
;
640 if (assigned_slave
) {
641 _unlock_rx_hashtbl(bond
);
642 return assigned_slave
;
645 /* the entry is already assigned to some other client,
646 * move the old client to primary (curr_active_slave) so
647 * that the new client can be assigned to this entry.
649 if (bond
->curr_active_slave
&&
650 client_info
->slave
!= bond
->curr_active_slave
) {
651 client_info
->slave
= bond
->curr_active_slave
;
652 rlb_update_client(client_info
);
656 /* assign a new slave */
657 assigned_slave
= rlb_next_rx_slave(bond
);
659 if (assigned_slave
) {
660 client_info
->ip_src
= arp
->ip_src
;
661 client_info
->ip_dst
= arp
->ip_dst
;
662 /* arp->mac_dst is broadcast for arp reqeusts.
663 * will be updated with clients actual unicast mac address
664 * upon receiving an arp reply.
666 memcpy(client_info
->mac_dst
, arp
->mac_dst
, ETH_ALEN
);
667 client_info
->slave
= assigned_slave
;
669 if (compare_ether_addr_64bits(client_info
->mac_dst
, mac_bcast
)) {
670 client_info
->ntt
= 1;
671 bond
->alb_info
.rx_ntt
= 1;
673 client_info
->ntt
= 0;
676 if (bond_vlan_used(bond
)) {
677 if (!vlan_get_tag(skb
, &client_info
->vlan_id
))
678 client_info
->tag
= 1;
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
= arp_pkt(skb
);
705 struct slave
*tx_slave
= NULL
;
707 /* Don't modify or load balance ARPs that do not originate locally
708 * (e.g.,arrive via a bridge).
710 if (!bond_slave_has_mac(bond
, arp
->mac_src
))
713 if (arp
->op_code
== htons(ARPOP_REPLY
)) {
714 /* the arp must be sent on the selected
717 tx_slave
= rlb_choose_channel(skb
, bond
);
719 memcpy(arp
->mac_src
,tx_slave
->dev
->dev_addr
, ETH_ALEN
);
721 pr_debug("Server sent ARP Reply packet\n");
722 } else if (arp
->op_code
== htons(ARPOP_REQUEST
)) {
723 /* Create an entry in the rx_hashtbl for this client as a
725 * When the arp reply is received the entry will be updated
726 * with the correct unicast address of the client.
728 rlb_choose_channel(skb
, bond
);
730 /* The ARP reply packets must be delayed so that
731 * they can cancel out the influence of the ARP request.
733 bond
->alb_info
.rlb_update_delay_counter
= RLB_UPDATE_DELAY
;
735 /* arp requests are broadcast and are sent on the primary
736 * the arp request will collapse all clients on the subnet to
737 * the primary slave. We must register these clients to be
738 * updated with their assigned mac.
740 rlb_req_update_subnet_clients(bond
, arp
->ip_src
);
741 pr_debug("Server sent ARP Request packet\n");
747 /* Caller must hold bond lock for read */
748 static void rlb_rebalance(struct bonding
*bond
)
750 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
751 struct slave
*assigned_slave
;
752 struct rlb_client_info
*client_info
;
756 _lock_rx_hashtbl_bh(bond
);
759 hash_index
= bond_info
->rx_hashtbl_head
;
760 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
761 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
762 assigned_slave
= rlb_next_rx_slave(bond
);
763 if (assigned_slave
&& (client_info
->slave
!= assigned_slave
)) {
764 client_info
->slave
= assigned_slave
;
765 client_info
->ntt
= 1;
770 /* update the team's flag only after the whole iteration */
772 bond_info
->rx_ntt
= 1;
774 _unlock_rx_hashtbl_bh(bond
);
777 /* Caller must hold rx_hashtbl lock */
778 static void rlb_init_table_entry(struct rlb_client_info
*entry
)
780 memset(entry
, 0, sizeof(struct rlb_client_info
));
781 entry
->next
= RLB_NULL_INDEX
;
782 entry
->prev
= RLB_NULL_INDEX
;
785 static int rlb_initialize(struct bonding
*bond
)
787 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
788 struct rlb_client_info
*new_hashtbl
;
789 int size
= RLB_HASH_TABLE_SIZE
* sizeof(struct rlb_client_info
);
792 new_hashtbl
= kmalloc(size
, GFP_KERNEL
);
796 _lock_rx_hashtbl_bh(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_bh(bond
);
808 /* register to receive ARPs */
809 bond
->recv_probe
= rlb_arp_recv
;
814 static void rlb_deinitialize(struct bonding
*bond
)
816 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
818 _lock_rx_hashtbl_bh(bond
);
820 kfree(bond_info
->rx_hashtbl
);
821 bond_info
->rx_hashtbl
= NULL
;
822 bond_info
->rx_hashtbl_head
= RLB_NULL_INDEX
;
824 _unlock_rx_hashtbl_bh(bond
);
827 static void rlb_clear_vlan(struct bonding
*bond
, unsigned short vlan_id
)
829 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
832 _lock_rx_hashtbl_bh(bond
);
834 curr_index
= bond_info
->rx_hashtbl_head
;
835 while (curr_index
!= RLB_NULL_INDEX
) {
836 struct rlb_client_info
*curr
= &(bond_info
->rx_hashtbl
[curr_index
]);
837 u32 next_index
= bond_info
->rx_hashtbl
[curr_index
].next
;
838 u32 prev_index
= bond_info
->rx_hashtbl
[curr_index
].prev
;
840 if (curr
->tag
&& (curr
->vlan_id
== vlan_id
)) {
841 if (curr_index
== bond_info
->rx_hashtbl_head
) {
842 bond_info
->rx_hashtbl_head
= next_index
;
844 if (prev_index
!= RLB_NULL_INDEX
) {
845 bond_info
->rx_hashtbl
[prev_index
].next
= next_index
;
847 if (next_index
!= RLB_NULL_INDEX
) {
848 bond_info
->rx_hashtbl
[next_index
].prev
= prev_index
;
851 rlb_init_table_entry(curr
);
854 curr_index
= next_index
;
857 _unlock_rx_hashtbl_bh(bond
);
860 /*********************** tlb/rlb shared functions *********************/
862 static void alb_send_learning_packets(struct slave
*slave
, u8 mac_addr
[])
864 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
865 struct learning_pkt pkt
;
866 int size
= sizeof(struct learning_pkt
);
869 memset(&pkt
, 0, size
);
870 memcpy(pkt
.mac_dst
, mac_addr
, ETH_ALEN
);
871 memcpy(pkt
.mac_src
, mac_addr
, ETH_ALEN
);
872 pkt
.type
= cpu_to_be16(ETH_P_LOOP
);
874 for (i
= 0; i
< MAX_LP_BURST
; i
++) {
878 skb
= dev_alloc_skb(size
);
883 data
= skb_put(skb
, size
);
884 memcpy(data
, &pkt
, size
);
886 skb_reset_mac_header(skb
);
887 skb
->network_header
= skb
->mac_header
+ ETH_HLEN
;
888 skb
->protocol
= pkt
.type
;
889 skb
->priority
= TC_PRIO_CONTROL
;
890 skb
->dev
= slave
->dev
;
892 if (bond_vlan_used(bond
)) {
893 struct vlan_entry
*vlan
;
895 vlan
= bond_next_vlan(bond
,
896 bond
->alb_info
.current_alb_vlan
);
898 bond
->alb_info
.current_alb_vlan
= vlan
;
904 skb
= vlan_put_tag(skb
, vlan
->vlan_id
);
906 pr_err("%s: Error: failed to insert VLAN tag\n",
916 static int alb_set_slave_mac_addr(struct slave
*slave
, u8 addr
[])
918 struct net_device
*dev
= slave
->dev
;
919 struct sockaddr s_addr
;
921 if (slave
->bond
->params
.mode
== BOND_MODE_TLB
) {
922 memcpy(dev
->dev_addr
, addr
, dev
->addr_len
);
926 /* for rlb each slave must have a unique hw mac addresses so that */
927 /* each slave will receive packets destined to a different mac */
928 memcpy(s_addr
.sa_data
, addr
, dev
->addr_len
);
929 s_addr
.sa_family
= dev
->type
;
930 if (dev_set_mac_address(dev
, &s_addr
)) {
931 pr_err("%s: Error: dev_set_mac_address of dev %s failed!\n"
932 "ALB mode requires that the base driver support setting the hw address also when the network device's interface is open\n",
933 dev
->master
->name
, dev
->name
);
940 * Swap MAC addresses between two slaves.
942 * Called with RTNL held, and no other locks.
946 static void alb_swap_mac_addr(struct bonding
*bond
, struct slave
*slave1
, struct slave
*slave2
)
948 u8 tmp_mac_addr
[ETH_ALEN
];
950 memcpy(tmp_mac_addr
, slave1
->dev
->dev_addr
, ETH_ALEN
);
951 alb_set_slave_mac_addr(slave1
, slave2
->dev
->dev_addr
);
952 alb_set_slave_mac_addr(slave2
, tmp_mac_addr
);
957 * Send learning packets after MAC address swap.
959 * Called with RTNL and no other locks
961 static void alb_fasten_mac_swap(struct bonding
*bond
, struct slave
*slave1
,
962 struct slave
*slave2
)
964 int slaves_state_differ
= (SLAVE_IS_OK(slave1
) != SLAVE_IS_OK(slave2
));
965 struct slave
*disabled_slave
= NULL
;
969 /* fasten the change in the switch */
970 if (SLAVE_IS_OK(slave1
)) {
971 alb_send_learning_packets(slave1
, slave1
->dev
->dev_addr
);
972 if (bond
->alb_info
.rlb_enabled
) {
973 /* inform the clients that the mac address
976 rlb_req_update_slave_clients(bond
, slave1
);
979 disabled_slave
= slave1
;
982 if (SLAVE_IS_OK(slave2
)) {
983 alb_send_learning_packets(slave2
, slave2
->dev
->dev_addr
);
984 if (bond
->alb_info
.rlb_enabled
) {
985 /* inform the clients that the mac address
988 rlb_req_update_slave_clients(bond
, slave2
);
991 disabled_slave
= slave2
;
994 if (bond
->alb_info
.rlb_enabled
&& slaves_state_differ
) {
995 /* A disabled slave was assigned an active mac addr */
996 rlb_teach_disabled_mac_on_primary(bond
,
997 disabled_slave
->dev
->dev_addr
);
1002 * alb_change_hw_addr_on_detach
1003 * @bond: bonding we're working on
1004 * @slave: the slave that was just detached
1006 * We assume that @slave was already detached from the slave list.
1008 * If @slave's permanent hw address is different both from its current
1009 * address and from @bond's address, then somewhere in the bond there's
1010 * a slave that has @slave's permanet address as its current address.
1011 * We'll make sure that that slave no longer uses @slave's permanent address.
1013 * Caller must hold RTNL and no other locks
1015 static void alb_change_hw_addr_on_detach(struct bonding
*bond
, struct slave
*slave
)
1020 perm_curr_diff
= compare_ether_addr_64bits(slave
->perm_hwaddr
,
1021 slave
->dev
->dev_addr
);
1022 perm_bond_diff
= compare_ether_addr_64bits(slave
->perm_hwaddr
,
1023 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 (!compare_ether_addr_64bits(slave
->perm_hwaddr
,
1031 tmp_slave
->dev
->dev_addr
)) {
1038 /* locking: needs RTNL and nothing else */
1039 alb_swap_mac_addr(bond
, slave
, tmp_slave
);
1040 alb_fasten_mac_swap(bond
, slave
, tmp_slave
);
1046 * alb_handle_addr_collision_on_attach
1047 * @bond: bonding we're working on
1048 * @slave: the slave that was just attached
1050 * checks uniqueness of slave's mac address and handles the case the
1051 * new slave uses the bonds mac address.
1053 * If the permanent hw address of @slave is @bond's hw address, we need to
1054 * find a different hw address to give @slave, that isn't in use by any other
1055 * slave in the bond. This address must be, of course, one of the permanent
1056 * addresses of the other slaves.
1058 * We go over the slave list, and for each slave there we compare its
1059 * permanent hw address with the current address of all the other slaves.
1060 * If no match was found, then we've found a slave with a permanent address
1061 * that isn't used by any other slave in the bond, so we can assign it to
1064 * assumption: this function is called before @slave is attached to the
1067 * caller must hold the bond lock for write since the mac addresses are compared
1068 * and may be swapped.
1070 static int alb_handle_addr_collision_on_attach(struct bonding
*bond
, struct slave
*slave
)
1072 struct slave
*tmp_slave1
, *tmp_slave2
, *free_mac_slave
;
1073 struct slave
*has_bond_addr
= bond
->curr_active_slave
;
1074 int i
, j
, found
= 0;
1076 if (bond
->slave_cnt
== 0) {
1077 /* this is the first slave */
1081 /* if slave's mac address differs from bond's mac address
1082 * check uniqueness of slave's mac address against the other
1083 * slaves in the bond.
1085 if (compare_ether_addr_64bits(slave
->perm_hwaddr
, bond
->dev
->dev_addr
)) {
1086 bond_for_each_slave(bond
, tmp_slave1
, i
) {
1087 if (!compare_ether_addr_64bits(tmp_slave1
->dev
->dev_addr
,
1088 slave
->dev
->dev_addr
)) {
1097 /* Try setting slave mac to bond address and fall-through
1098 to code handling that situation below... */
1099 alb_set_slave_mac_addr(slave
, bond
->dev
->dev_addr
);
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 (!compare_ether_addr_64bits(tmp_slave1
->perm_hwaddr
,
1111 tmp_slave2
->dev
->dev_addr
)) {
1118 /* no slave has tmp_slave1's perm addr
1121 free_mac_slave
= tmp_slave1
;
1125 if (!has_bond_addr
) {
1126 if (!compare_ether_addr_64bits(tmp_slave1
->dev
->dev_addr
,
1127 bond
->dev
->dev_addr
)) {
1129 has_bond_addr
= tmp_slave1
;
1134 if (free_mac_slave
) {
1135 alb_set_slave_mac_addr(slave
, free_mac_slave
->perm_hwaddr
);
1137 pr_warning("%s: Warning: the hw address of slave %s is in use by the bond; giving it the hw address of %s\n",
1138 bond
->dev
->name
, slave
->dev
->name
,
1139 free_mac_slave
->dev
->name
);
1141 } else if (has_bond_addr
) {
1142 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",
1143 bond
->dev
->name
, slave
->dev
->name
);
1151 * alb_set_mac_address
1155 * In TLB mode all slaves are configured to the bond's hw address, but set
1156 * their dev_addr field to different addresses (based on their permanent hw
1159 * For each slave, this function sets the interface to the new address and then
1160 * changes its dev_addr field to its previous value.
1162 * Unwinding assumes bond's mac address has not yet changed.
1164 static int alb_set_mac_address(struct bonding
*bond
, void *addr
)
1167 struct slave
*slave
, *stop_at
;
1168 char tmp_addr
[ETH_ALEN
];
1172 if (bond
->alb_info
.rlb_enabled
) {
1176 bond_for_each_slave(bond
, slave
, i
) {
1177 /* save net_device's current hw address */
1178 memcpy(tmp_addr
, slave
->dev
->dev_addr
, ETH_ALEN
);
1180 res
= dev_set_mac_address(slave
->dev
, addr
);
1182 /* restore net_device's hw address */
1183 memcpy(slave
->dev
->dev_addr
, tmp_addr
, ETH_ALEN
);
1192 memcpy(sa
.sa_data
, bond
->dev
->dev_addr
, bond
->dev
->addr_len
);
1193 sa
.sa_family
= bond
->dev
->type
;
1195 /* unwind from head to the slave that failed */
1197 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
1198 memcpy(tmp_addr
, slave
->dev
->dev_addr
, ETH_ALEN
);
1199 dev_set_mac_address(slave
->dev
, &sa
);
1200 memcpy(slave
->dev
->dev_addr
, tmp_addr
, ETH_ALEN
);
1206 /************************ exported alb funcions ************************/
1208 int bond_alb_initialize(struct bonding
*bond
, int rlb_enabled
)
1212 res
= tlb_initialize(bond
);
1218 bond
->alb_info
.rlb_enabled
= 1;
1219 /* initialize rlb */
1220 res
= rlb_initialize(bond
);
1222 tlb_deinitialize(bond
);
1226 bond
->alb_info
.rlb_enabled
= 0;
1232 void bond_alb_deinitialize(struct bonding
*bond
)
1234 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1236 tlb_deinitialize(bond
);
1238 if (bond_info
->rlb_enabled
) {
1239 rlb_deinitialize(bond
);
1243 int bond_alb_xmit(struct sk_buff
*skb
, struct net_device
*bond_dev
)
1245 struct bonding
*bond
= netdev_priv(bond_dev
);
1246 struct ethhdr
*eth_data
;
1247 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1248 struct slave
*tx_slave
= NULL
;
1249 static const __be32 ip_bcast
= htonl(0xffffffff);
1251 int do_tx_balance
= 1;
1253 const u8
*hash_start
= NULL
;
1255 struct ipv6hdr
*ip6hdr
;
1257 skb_reset_mac_header(skb
);
1258 eth_data
= eth_hdr(skb
);
1260 /* make sure that the curr_active_slave do not change during tx
1262 read_lock(&bond
->curr_slave_lock
);
1264 switch (ntohs(skb
->protocol
)) {
1266 const struct iphdr
*iph
= ip_hdr(skb
);
1268 if (!compare_ether_addr_64bits(eth_data
->h_dest
, mac_bcast
) ||
1269 (iph
->daddr
== ip_bcast
) ||
1270 (iph
->protocol
== IPPROTO_IGMP
)) {
1274 hash_start
= (char *)&(iph
->daddr
);
1275 hash_size
= sizeof(iph
->daddr
);
1279 /* IPv6 doesn't really use broadcast mac address, but leave
1280 * that here just in case.
1282 if (!compare_ether_addr_64bits(eth_data
->h_dest
, mac_bcast
)) {
1287 /* IPv6 uses all-nodes multicast as an equivalent to
1288 * broadcasts in IPv4.
1290 if (!compare_ether_addr_64bits(eth_data
->h_dest
, mac_v6_allmcast
)) {
1295 /* Additianally, DAD probes should not be tx-balanced as that
1296 * will lead to false positives for duplicate addresses and
1297 * prevent address configuration from working.
1299 ip6hdr
= ipv6_hdr(skb
);
1300 if (ipv6_addr_any(&ip6hdr
->saddr
)) {
1305 hash_start
= (char *)&(ipv6_hdr(skb
)->daddr
);
1306 hash_size
= sizeof(ipv6_hdr(skb
)->daddr
);
1309 if (ipx_hdr(skb
)->ipx_checksum
!= IPX_NO_CHECKSUM
) {
1310 /* something is wrong with this packet */
1315 if (ipx_hdr(skb
)->ipx_type
!= IPX_TYPE_NCP
) {
1316 /* The only protocol worth balancing in
1317 * this family since it has an "ARP" like
1324 hash_start
= (char*)eth_data
->h_dest
;
1325 hash_size
= ETH_ALEN
;
1329 if (bond_info
->rlb_enabled
) {
1330 tx_slave
= rlb_arp_xmit(skb
, bond
);
1338 if (do_tx_balance
) {
1339 hash_index
= _simple_hash(hash_start
, hash_size
);
1340 tx_slave
= tlb_choose_channel(bond
, hash_index
, skb
->len
);
1344 /* unbalanced or unassigned, send through primary */
1345 tx_slave
= bond
->curr_active_slave
;
1346 bond_info
->unbalanced_load
+= skb
->len
;
1349 if (tx_slave
&& SLAVE_IS_OK(tx_slave
)) {
1350 if (tx_slave
!= bond
->curr_active_slave
) {
1351 memcpy(eth_data
->h_source
,
1352 tx_slave
->dev
->dev_addr
,
1356 res
= bond_dev_queue_xmit(bond
, skb
, tx_slave
->dev
);
1359 _lock_tx_hashtbl(bond
);
1360 __tlb_clear_slave(bond
, tx_slave
, 0);
1361 _unlock_tx_hashtbl(bond
);
1366 /* no suitable interface, frame not sent */
1369 read_unlock(&bond
->curr_slave_lock
);
1371 return NETDEV_TX_OK
;
1374 void bond_alb_monitor(struct work_struct
*work
)
1376 struct bonding
*bond
= container_of(work
, struct bonding
,
1378 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1379 struct slave
*slave
;
1382 read_lock(&bond
->lock
);
1384 if (bond
->slave_cnt
== 0) {
1385 bond_info
->tx_rebalance_counter
= 0;
1386 bond_info
->lp_counter
= 0;
1390 bond_info
->tx_rebalance_counter
++;
1391 bond_info
->lp_counter
++;
1393 /* send learning packets */
1394 if (bond_info
->lp_counter
>= BOND_ALB_LP_TICKS
) {
1395 /* change of curr_active_slave involves swapping of mac addresses.
1396 * in order to avoid this swapping from happening while
1397 * sending the learning packets, the curr_slave_lock must be held for
1400 read_lock(&bond
->curr_slave_lock
);
1402 bond_for_each_slave(bond
, slave
, i
) {
1403 alb_send_learning_packets(slave
, slave
->dev
->dev_addr
);
1406 read_unlock(&bond
->curr_slave_lock
);
1408 bond_info
->lp_counter
= 0;
1411 /* rebalance tx traffic */
1412 if (bond_info
->tx_rebalance_counter
>= BOND_TLB_REBALANCE_TICKS
) {
1414 read_lock(&bond
->curr_slave_lock
);
1416 bond_for_each_slave(bond
, slave
, i
) {
1417 tlb_clear_slave(bond
, slave
, 1);
1418 if (slave
== bond
->curr_active_slave
) {
1419 SLAVE_TLB_INFO(slave
).load
=
1420 bond_info
->unbalanced_load
/
1421 BOND_TLB_REBALANCE_INTERVAL
;
1422 bond_info
->unbalanced_load
= 0;
1426 read_unlock(&bond
->curr_slave_lock
);
1428 bond_info
->tx_rebalance_counter
= 0;
1431 /* handle rlb stuff */
1432 if (bond_info
->rlb_enabled
) {
1433 if (bond_info
->primary_is_promisc
&&
1434 (++bond_info
->rlb_promisc_timeout_counter
>= RLB_PROMISC_TIMEOUT
)) {
1437 * dev_set_promiscuity requires rtnl and
1438 * nothing else. Avoid race with bond_close.
1440 read_unlock(&bond
->lock
);
1441 if (!rtnl_trylock()) {
1442 read_lock(&bond
->lock
);
1446 bond_info
->rlb_promisc_timeout_counter
= 0;
1448 /* If the primary was set to promiscuous mode
1449 * because a slave was disabled then
1450 * it can now leave promiscuous mode.
1452 dev_set_promiscuity(bond
->curr_active_slave
->dev
, -1);
1453 bond_info
->primary_is_promisc
= 0;
1456 read_lock(&bond
->lock
);
1459 if (bond_info
->rlb_rebalance
) {
1460 bond_info
->rlb_rebalance
= 0;
1461 rlb_rebalance(bond
);
1464 /* check if clients need updating */
1465 if (bond_info
->rx_ntt
) {
1466 if (bond_info
->rlb_update_delay_counter
) {
1467 --bond_info
->rlb_update_delay_counter
;
1469 rlb_update_rx_clients(bond
);
1470 if (bond_info
->rlb_update_retry_counter
) {
1471 --bond_info
->rlb_update_retry_counter
;
1473 bond_info
->rx_ntt
= 0;
1480 queue_delayed_work(bond
->wq
, &bond
->alb_work
, alb_delta_in_ticks
);
1482 read_unlock(&bond
->lock
);
1485 /* assumption: called before the slave is attached to the bond
1486 * and not locked by the bond lock
1488 int bond_alb_init_slave(struct bonding
*bond
, struct slave
*slave
)
1492 res
= alb_set_slave_mac_addr(slave
, slave
->perm_hwaddr
);
1497 /* caller must hold the bond lock for write since the mac addresses
1498 * are compared and may be swapped.
1500 read_lock(&bond
->lock
);
1502 res
= alb_handle_addr_collision_on_attach(bond
, slave
);
1504 read_unlock(&bond
->lock
);
1510 tlb_init_slave(slave
);
1512 /* order a rebalance ASAP */
1513 bond
->alb_info
.tx_rebalance_counter
= BOND_TLB_REBALANCE_TICKS
;
1515 if (bond
->alb_info
.rlb_enabled
) {
1516 bond
->alb_info
.rlb_rebalance
= 1;
1523 * Remove slave from tlb and rlb hash tables, and fix up MAC addresses
1526 * Caller must hold RTNL and no other locks
1528 void bond_alb_deinit_slave(struct bonding
*bond
, struct slave
*slave
)
1530 if (bond
->slave_cnt
> 1) {
1531 alb_change_hw_addr_on_detach(bond
, slave
);
1534 tlb_clear_slave(bond
, slave
, 0);
1536 if (bond
->alb_info
.rlb_enabled
) {
1537 bond
->alb_info
.next_rx_slave
= NULL
;
1538 rlb_clear_slave(bond
, slave
);
1542 /* Caller must hold bond lock for read */
1543 void bond_alb_handle_link_change(struct bonding
*bond
, struct slave
*slave
, char link
)
1545 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1547 if (link
== BOND_LINK_DOWN
) {
1548 tlb_clear_slave(bond
, slave
, 0);
1549 if (bond
->alb_info
.rlb_enabled
) {
1550 rlb_clear_slave(bond
, slave
);
1552 } else if (link
== BOND_LINK_UP
) {
1553 /* order a rebalance ASAP */
1554 bond_info
->tx_rebalance_counter
= BOND_TLB_REBALANCE_TICKS
;
1555 if (bond
->alb_info
.rlb_enabled
) {
1556 bond
->alb_info
.rlb_rebalance
= 1;
1557 /* If the updelay module parameter is smaller than the
1558 * forwarding delay of the switch the rebalance will
1559 * not work because the rebalance arp replies will
1560 * not be forwarded to the clients..
1567 * bond_alb_handle_active_change - assign new curr_active_slave
1568 * @bond: our bonding struct
1569 * @new_slave: new slave to assign
1571 * Set the bond->curr_active_slave to @new_slave and handle
1572 * mac address swapping and promiscuity changes as needed.
1574 * If new_slave is NULL, caller must hold curr_slave_lock or
1575 * bond->lock for write.
1577 * If new_slave is not NULL, caller must hold RTNL, bond->lock for
1578 * read and curr_slave_lock for write. Processing here may sleep, so
1579 * no other locks may be held.
1581 void bond_alb_handle_active_change(struct bonding
*bond
, struct slave
*new_slave
)
1582 __releases(&bond
->curr_slave_lock
)
1583 __releases(&bond
->lock
)
1584 __acquires(&bond
->lock
)
1585 __acquires(&bond
->curr_slave_lock
)
1587 struct slave
*swap_slave
;
1590 if (bond
->curr_active_slave
== new_slave
) {
1594 if (bond
->curr_active_slave
&& bond
->alb_info
.primary_is_promisc
) {
1595 dev_set_promiscuity(bond
->curr_active_slave
->dev
, -1);
1596 bond
->alb_info
.primary_is_promisc
= 0;
1597 bond
->alb_info
.rlb_promisc_timeout_counter
= 0;
1600 swap_slave
= bond
->curr_active_slave
;
1601 bond
->curr_active_slave
= new_slave
;
1603 if (!new_slave
|| (bond
->slave_cnt
== 0)) {
1607 /* set the new curr_active_slave to the bonds mac address
1608 * i.e. swap mac addresses of old curr_active_slave and new curr_active_slave
1611 struct slave
*tmp_slave
;
1612 /* find slave that is holding the bond's mac address */
1613 bond_for_each_slave(bond
, tmp_slave
, i
) {
1614 if (!compare_ether_addr_64bits(tmp_slave
->dev
->dev_addr
,
1615 bond
->dev
->dev_addr
)) {
1616 swap_slave
= tmp_slave
;
1623 * Arrange for swap_slave and new_slave to temporarily be
1624 * ignored so we can mess with their MAC addresses without
1625 * fear of interference from transmit activity.
1628 tlb_clear_slave(bond
, swap_slave
, 1);
1630 tlb_clear_slave(bond
, new_slave
, 1);
1632 write_unlock_bh(&bond
->curr_slave_lock
);
1633 read_unlock(&bond
->lock
);
1637 /* curr_active_slave must be set before calling alb_swap_mac_addr */
1639 /* swap mac address */
1640 alb_swap_mac_addr(bond
, swap_slave
, new_slave
);
1642 /* set the new_slave to the bond mac address */
1643 alb_set_slave_mac_addr(new_slave
, bond
->dev
->dev_addr
);
1647 alb_fasten_mac_swap(bond
, swap_slave
, new_slave
);
1648 read_lock(&bond
->lock
);
1650 read_lock(&bond
->lock
);
1651 alb_send_learning_packets(new_slave
, bond
->dev
->dev_addr
);
1654 write_lock_bh(&bond
->curr_slave_lock
);
1660 int bond_alb_set_mac_address(struct net_device
*bond_dev
, void *addr
)
1661 __acquires(&bond
->lock
)
1662 __releases(&bond
->lock
)
1664 struct bonding
*bond
= netdev_priv(bond_dev
);
1665 struct sockaddr
*sa
= addr
;
1666 struct slave
*slave
, *swap_slave
;
1670 if (!is_valid_ether_addr(sa
->sa_data
)) {
1671 return -EADDRNOTAVAIL
;
1674 res
= alb_set_mac_address(bond
, addr
);
1679 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
1681 /* If there is no curr_active_slave there is nothing else to do.
1682 * Otherwise we'll need to pass the new address to it and handle
1685 if (!bond
->curr_active_slave
) {
1691 bond_for_each_slave(bond
, slave
, i
) {
1692 if (!compare_ether_addr_64bits(slave
->dev
->dev_addr
,
1693 bond_dev
->dev_addr
)) {
1700 alb_swap_mac_addr(bond
, swap_slave
, bond
->curr_active_slave
);
1701 alb_fasten_mac_swap(bond
, swap_slave
, bond
->curr_active_slave
);
1703 alb_set_slave_mac_addr(bond
->curr_active_slave
, bond_dev
->dev_addr
);
1705 read_lock(&bond
->lock
);
1706 alb_send_learning_packets(bond
->curr_active_slave
, bond_dev
->dev_addr
);
1707 if (bond
->alb_info
.rlb_enabled
) {
1708 /* inform clients mac address has changed */
1709 rlb_req_update_slave_clients(bond
, bond
->curr_active_slave
);
1711 read_unlock(&bond
->lock
);
1717 void bond_alb_clear_vlan(struct bonding
*bond
, unsigned short vlan_id
)
1719 if (bond
->alb_info
.current_alb_vlan
&&
1720 (bond
->alb_info
.current_alb_vlan
->vlan_id
== vlan_id
)) {
1721 bond
->alb_info
.current_alb_vlan
= NULL
;
1724 if (bond
->alb_info
.rlb_enabled
) {
1725 rlb_clear_vlan(bond
, vlan_id
);