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(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 (!ether_addr_equal_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 !ether_addr_equal_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 !ether_addr_equal_64bits(client_info
->slave
->dev
->dev_addr
,
606 bond
->dev
->dev_addr
) &&
607 !ether_addr_equal_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 (!ether_addr_equal_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 (!ether_addr_equal_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 if (arp
->op_code
== htons(ARPOP_REPLY
)) {
708 /* the arp must be sent on the selected
711 tx_slave
= rlb_choose_channel(skb
, bond
);
713 memcpy(arp
->mac_src
,tx_slave
->dev
->dev_addr
, ETH_ALEN
);
715 pr_debug("Server sent ARP Reply packet\n");
716 } else if (arp
->op_code
== htons(ARPOP_REQUEST
)) {
717 /* Create an entry in the rx_hashtbl for this client as a
719 * When the arp reply is received the entry will be updated
720 * with the correct unicast address of the client.
722 rlb_choose_channel(skb
, bond
);
724 /* The ARP reply packets must be delayed so that
725 * they can cancel out the influence of the ARP request.
727 bond
->alb_info
.rlb_update_delay_counter
= RLB_UPDATE_DELAY
;
729 /* arp requests are broadcast and are sent on the primary
730 * the arp request will collapse all clients on the subnet to
731 * the primary slave. We must register these clients to be
732 * updated with their assigned mac.
734 rlb_req_update_subnet_clients(bond
, arp
->ip_src
);
735 pr_debug("Server sent ARP Request packet\n");
741 /* Caller must hold bond lock for read */
742 static void rlb_rebalance(struct bonding
*bond
)
744 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
745 struct slave
*assigned_slave
;
746 struct rlb_client_info
*client_info
;
750 _lock_rx_hashtbl_bh(bond
);
753 hash_index
= bond_info
->rx_hashtbl_head
;
754 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
755 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
756 assigned_slave
= rlb_next_rx_slave(bond
);
757 if (assigned_slave
&& (client_info
->slave
!= assigned_slave
)) {
758 client_info
->slave
= assigned_slave
;
759 client_info
->ntt
= 1;
764 /* update the team's flag only after the whole iteration */
766 bond_info
->rx_ntt
= 1;
768 _unlock_rx_hashtbl_bh(bond
);
771 /* Caller must hold rx_hashtbl lock */
772 static void rlb_init_table_entry(struct rlb_client_info
*entry
)
774 memset(entry
, 0, sizeof(struct rlb_client_info
));
775 entry
->next
= RLB_NULL_INDEX
;
776 entry
->prev
= RLB_NULL_INDEX
;
779 static int rlb_initialize(struct bonding
*bond
)
781 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
782 struct rlb_client_info
*new_hashtbl
;
783 int size
= RLB_HASH_TABLE_SIZE
* sizeof(struct rlb_client_info
);
786 new_hashtbl
= kmalloc(size
, GFP_KERNEL
);
790 _lock_rx_hashtbl_bh(bond
);
792 bond_info
->rx_hashtbl
= new_hashtbl
;
794 bond_info
->rx_hashtbl_head
= RLB_NULL_INDEX
;
796 for (i
= 0; i
< RLB_HASH_TABLE_SIZE
; i
++) {
797 rlb_init_table_entry(bond_info
->rx_hashtbl
+ i
);
800 _unlock_rx_hashtbl_bh(bond
);
802 /* register to receive ARPs */
803 bond
->recv_probe
= rlb_arp_recv
;
808 static void rlb_deinitialize(struct bonding
*bond
)
810 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
812 _lock_rx_hashtbl_bh(bond
);
814 kfree(bond_info
->rx_hashtbl
);
815 bond_info
->rx_hashtbl
= NULL
;
816 bond_info
->rx_hashtbl_head
= RLB_NULL_INDEX
;
818 _unlock_rx_hashtbl_bh(bond
);
821 static void rlb_clear_vlan(struct bonding
*bond
, unsigned short vlan_id
)
823 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
826 _lock_rx_hashtbl_bh(bond
);
828 curr_index
= bond_info
->rx_hashtbl_head
;
829 while (curr_index
!= RLB_NULL_INDEX
) {
830 struct rlb_client_info
*curr
= &(bond_info
->rx_hashtbl
[curr_index
]);
831 u32 next_index
= bond_info
->rx_hashtbl
[curr_index
].next
;
832 u32 prev_index
= bond_info
->rx_hashtbl
[curr_index
].prev
;
834 if (curr
->tag
&& (curr
->vlan_id
== vlan_id
)) {
835 if (curr_index
== bond_info
->rx_hashtbl_head
) {
836 bond_info
->rx_hashtbl_head
= next_index
;
838 if (prev_index
!= RLB_NULL_INDEX
) {
839 bond_info
->rx_hashtbl
[prev_index
].next
= next_index
;
841 if (next_index
!= RLB_NULL_INDEX
) {
842 bond_info
->rx_hashtbl
[next_index
].prev
= prev_index
;
845 rlb_init_table_entry(curr
);
848 curr_index
= next_index
;
851 _unlock_rx_hashtbl_bh(bond
);
854 /*********************** tlb/rlb shared functions *********************/
856 static void alb_send_learning_packets(struct slave
*slave
, u8 mac_addr
[])
858 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
859 struct learning_pkt pkt
;
860 int size
= sizeof(struct learning_pkt
);
863 memset(&pkt
, 0, size
);
864 memcpy(pkt
.mac_dst
, mac_addr
, ETH_ALEN
);
865 memcpy(pkt
.mac_src
, mac_addr
, ETH_ALEN
);
866 pkt
.type
= cpu_to_be16(ETH_P_LOOP
);
868 for (i
= 0; i
< MAX_LP_BURST
; i
++) {
872 skb
= dev_alloc_skb(size
);
877 data
= skb_put(skb
, size
);
878 memcpy(data
, &pkt
, size
);
880 skb_reset_mac_header(skb
);
881 skb
->network_header
= skb
->mac_header
+ ETH_HLEN
;
882 skb
->protocol
= pkt
.type
;
883 skb
->priority
= TC_PRIO_CONTROL
;
884 skb
->dev
= slave
->dev
;
886 if (bond_vlan_used(bond
)) {
887 struct vlan_entry
*vlan
;
889 vlan
= bond_next_vlan(bond
,
890 bond
->alb_info
.current_alb_vlan
);
892 bond
->alb_info
.current_alb_vlan
= vlan
;
898 skb
= vlan_put_tag(skb
, vlan
->vlan_id
);
900 pr_err("%s: Error: failed to insert VLAN tag\n",
910 static int alb_set_slave_mac_addr(struct slave
*slave
, u8 addr
[])
912 struct net_device
*dev
= slave
->dev
;
913 struct sockaddr s_addr
;
915 if (slave
->bond
->params
.mode
== BOND_MODE_TLB
) {
916 memcpy(dev
->dev_addr
, addr
, dev
->addr_len
);
920 /* for rlb each slave must have a unique hw mac addresses so that */
921 /* each slave will receive packets destined to a different mac */
922 memcpy(s_addr
.sa_data
, addr
, dev
->addr_len
);
923 s_addr
.sa_family
= dev
->type
;
924 if (dev_set_mac_address(dev
, &s_addr
)) {
925 pr_err("%s: Error: dev_set_mac_address of dev %s failed!\n"
926 "ALB mode requires that the base driver support setting the hw address also when the network device's interface is open\n",
927 dev
->master
->name
, dev
->name
);
934 * Swap MAC addresses between two slaves.
936 * Called with RTNL held, and no other locks.
940 static void alb_swap_mac_addr(struct bonding
*bond
, struct slave
*slave1
, struct slave
*slave2
)
942 u8 tmp_mac_addr
[ETH_ALEN
];
944 memcpy(tmp_mac_addr
, slave1
->dev
->dev_addr
, ETH_ALEN
);
945 alb_set_slave_mac_addr(slave1
, slave2
->dev
->dev_addr
);
946 alb_set_slave_mac_addr(slave2
, tmp_mac_addr
);
951 * Send learning packets after MAC address swap.
953 * Called with RTNL and no other locks
955 static void alb_fasten_mac_swap(struct bonding
*bond
, struct slave
*slave1
,
956 struct slave
*slave2
)
958 int slaves_state_differ
= (SLAVE_IS_OK(slave1
) != SLAVE_IS_OK(slave2
));
959 struct slave
*disabled_slave
= NULL
;
963 /* fasten the change in the switch */
964 if (SLAVE_IS_OK(slave1
)) {
965 alb_send_learning_packets(slave1
, slave1
->dev
->dev_addr
);
966 if (bond
->alb_info
.rlb_enabled
) {
967 /* inform the clients that the mac address
970 rlb_req_update_slave_clients(bond
, slave1
);
973 disabled_slave
= slave1
;
976 if (SLAVE_IS_OK(slave2
)) {
977 alb_send_learning_packets(slave2
, slave2
->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
, slave2
);
985 disabled_slave
= slave2
;
988 if (bond
->alb_info
.rlb_enabled
&& slaves_state_differ
) {
989 /* A disabled slave was assigned an active mac addr */
990 rlb_teach_disabled_mac_on_primary(bond
,
991 disabled_slave
->dev
->dev_addr
);
996 * alb_change_hw_addr_on_detach
997 * @bond: bonding we're working on
998 * @slave: the slave that was just detached
1000 * We assume that @slave was already detached from the slave list.
1002 * If @slave's permanent hw address is different both from its current
1003 * address and from @bond's address, then somewhere in the bond there's
1004 * a slave that has @slave's permanet address as its current address.
1005 * We'll make sure that that slave no longer uses @slave's permanent address.
1007 * Caller must hold RTNL and no other locks
1009 static void alb_change_hw_addr_on_detach(struct bonding
*bond
, struct slave
*slave
)
1014 perm_curr_diff
= !ether_addr_equal_64bits(slave
->perm_hwaddr
,
1015 slave
->dev
->dev_addr
);
1016 perm_bond_diff
= !ether_addr_equal_64bits(slave
->perm_hwaddr
,
1017 bond
->dev
->dev_addr
);
1019 if (perm_curr_diff
&& perm_bond_diff
) {
1020 struct slave
*tmp_slave
;
1023 bond_for_each_slave(bond
, tmp_slave
, i
) {
1024 if (ether_addr_equal_64bits(slave
->perm_hwaddr
,
1025 tmp_slave
->dev
->dev_addr
)) {
1032 /* locking: needs RTNL and nothing else */
1033 alb_swap_mac_addr(bond
, slave
, tmp_slave
);
1034 alb_fasten_mac_swap(bond
, slave
, tmp_slave
);
1040 * alb_handle_addr_collision_on_attach
1041 * @bond: bonding we're working on
1042 * @slave: the slave that was just attached
1044 * checks uniqueness of slave's mac address and handles the case the
1045 * new slave uses the bonds mac address.
1047 * If the permanent hw address of @slave is @bond's hw address, we need to
1048 * find a different hw address to give @slave, that isn't in use by any other
1049 * slave in the bond. This address must be, of course, one of the permanent
1050 * addresses of the other slaves.
1052 * We go over the slave list, and for each slave there we compare its
1053 * permanent hw address with the current address of all the other slaves.
1054 * If no match was found, then we've found a slave with a permanent address
1055 * that isn't used by any other slave in the bond, so we can assign it to
1058 * assumption: this function is called before @slave is attached to the
1061 * caller must hold the bond lock for write since the mac addresses are compared
1062 * and may be swapped.
1064 static int alb_handle_addr_collision_on_attach(struct bonding
*bond
, struct slave
*slave
)
1066 struct slave
*tmp_slave1
, *tmp_slave2
, *free_mac_slave
;
1067 struct slave
*has_bond_addr
= bond
->curr_active_slave
;
1068 int i
, j
, found
= 0;
1070 if (bond
->slave_cnt
== 0) {
1071 /* this is the first slave */
1075 /* if slave's mac address differs from bond's mac address
1076 * check uniqueness of slave's mac address against the other
1077 * slaves in the bond.
1079 if (!ether_addr_equal_64bits(slave
->perm_hwaddr
, bond
->dev
->dev_addr
)) {
1080 bond_for_each_slave(bond
, tmp_slave1
, i
) {
1081 if (ether_addr_equal_64bits(tmp_slave1
->dev
->dev_addr
,
1082 slave
->dev
->dev_addr
)) {
1091 /* Try setting slave mac to bond address and fall-through
1092 to code handling that situation below... */
1093 alb_set_slave_mac_addr(slave
, bond
->dev
->dev_addr
);
1096 /* The slave's address is equal to the address of the bond.
1097 * Search for a spare address in the bond for this slave.
1099 free_mac_slave
= NULL
;
1101 bond_for_each_slave(bond
, tmp_slave1
, i
) {
1103 bond_for_each_slave(bond
, tmp_slave2
, j
) {
1104 if (ether_addr_equal_64bits(tmp_slave1
->perm_hwaddr
,
1105 tmp_slave2
->dev
->dev_addr
)) {
1112 /* no slave has tmp_slave1's perm addr
1115 free_mac_slave
= tmp_slave1
;
1119 if (!has_bond_addr
) {
1120 if (ether_addr_equal_64bits(tmp_slave1
->dev
->dev_addr
,
1121 bond
->dev
->dev_addr
)) {
1123 has_bond_addr
= tmp_slave1
;
1128 if (free_mac_slave
) {
1129 alb_set_slave_mac_addr(slave
, free_mac_slave
->perm_hwaddr
);
1131 pr_warning("%s: Warning: the hw address of slave %s is in use by the bond; giving it the hw address of %s\n",
1132 bond
->dev
->name
, slave
->dev
->name
,
1133 free_mac_slave
->dev
->name
);
1135 } else if (has_bond_addr
) {
1136 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",
1137 bond
->dev
->name
, slave
->dev
->name
);
1145 * alb_set_mac_address
1149 * In TLB mode all slaves are configured to the bond's hw address, but set
1150 * their dev_addr field to different addresses (based on their permanent hw
1153 * For each slave, this function sets the interface to the new address and then
1154 * changes its dev_addr field to its previous value.
1156 * Unwinding assumes bond's mac address has not yet changed.
1158 static int alb_set_mac_address(struct bonding
*bond
, void *addr
)
1161 struct slave
*slave
, *stop_at
;
1162 char tmp_addr
[ETH_ALEN
];
1166 if (bond
->alb_info
.rlb_enabled
) {
1170 bond_for_each_slave(bond
, slave
, i
) {
1171 /* save net_device's current hw address */
1172 memcpy(tmp_addr
, slave
->dev
->dev_addr
, ETH_ALEN
);
1174 res
= dev_set_mac_address(slave
->dev
, addr
);
1176 /* restore net_device's hw address */
1177 memcpy(slave
->dev
->dev_addr
, tmp_addr
, ETH_ALEN
);
1186 memcpy(sa
.sa_data
, bond
->dev
->dev_addr
, bond
->dev
->addr_len
);
1187 sa
.sa_family
= bond
->dev
->type
;
1189 /* unwind from head to the slave that failed */
1191 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
1192 memcpy(tmp_addr
, slave
->dev
->dev_addr
, ETH_ALEN
);
1193 dev_set_mac_address(slave
->dev
, &sa
);
1194 memcpy(slave
->dev
->dev_addr
, tmp_addr
, ETH_ALEN
);
1200 /************************ exported alb funcions ************************/
1202 int bond_alb_initialize(struct bonding
*bond
, int rlb_enabled
)
1206 res
= tlb_initialize(bond
);
1212 bond
->alb_info
.rlb_enabled
= 1;
1213 /* initialize rlb */
1214 res
= rlb_initialize(bond
);
1216 tlb_deinitialize(bond
);
1220 bond
->alb_info
.rlb_enabled
= 0;
1226 void bond_alb_deinitialize(struct bonding
*bond
)
1228 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1230 tlb_deinitialize(bond
);
1232 if (bond_info
->rlb_enabled
) {
1233 rlb_deinitialize(bond
);
1237 int bond_alb_xmit(struct sk_buff
*skb
, struct net_device
*bond_dev
)
1239 struct bonding
*bond
= netdev_priv(bond_dev
);
1240 struct ethhdr
*eth_data
;
1241 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1242 struct slave
*tx_slave
= NULL
;
1243 static const __be32 ip_bcast
= htonl(0xffffffff);
1245 int do_tx_balance
= 1;
1247 const u8
*hash_start
= NULL
;
1249 struct ipv6hdr
*ip6hdr
;
1251 skb_reset_mac_header(skb
);
1252 eth_data
= eth_hdr(skb
);
1254 /* make sure that the curr_active_slave do not change during tx
1256 read_lock(&bond
->curr_slave_lock
);
1258 switch (ntohs(skb
->protocol
)) {
1260 const struct iphdr
*iph
= ip_hdr(skb
);
1262 if (ether_addr_equal_64bits(eth_data
->h_dest
, mac_bcast
) ||
1263 (iph
->daddr
== ip_bcast
) ||
1264 (iph
->protocol
== IPPROTO_IGMP
)) {
1268 hash_start
= (char *)&(iph
->daddr
);
1269 hash_size
= sizeof(iph
->daddr
);
1273 /* IPv6 doesn't really use broadcast mac address, but leave
1274 * that here just in case.
1276 if (ether_addr_equal_64bits(eth_data
->h_dest
, mac_bcast
)) {
1281 /* IPv6 uses all-nodes multicast as an equivalent to
1282 * broadcasts in IPv4.
1284 if (ether_addr_equal_64bits(eth_data
->h_dest
, mac_v6_allmcast
)) {
1289 /* Additianally, DAD probes should not be tx-balanced as that
1290 * will lead to false positives for duplicate addresses and
1291 * prevent address configuration from working.
1293 ip6hdr
= ipv6_hdr(skb
);
1294 if (ipv6_addr_any(&ip6hdr
->saddr
)) {
1299 hash_start
= (char *)&(ipv6_hdr(skb
)->daddr
);
1300 hash_size
= sizeof(ipv6_hdr(skb
)->daddr
);
1303 if (ipx_hdr(skb
)->ipx_checksum
!= IPX_NO_CHECKSUM
) {
1304 /* something is wrong with this packet */
1309 if (ipx_hdr(skb
)->ipx_type
!= IPX_TYPE_NCP
) {
1310 /* The only protocol worth balancing in
1311 * this family since it has an "ARP" like
1318 hash_start
= (char*)eth_data
->h_dest
;
1319 hash_size
= ETH_ALEN
;
1323 if (bond_info
->rlb_enabled
) {
1324 tx_slave
= rlb_arp_xmit(skb
, bond
);
1332 if (do_tx_balance
) {
1333 hash_index
= _simple_hash(hash_start
, hash_size
);
1334 tx_slave
= tlb_choose_channel(bond
, hash_index
, skb
->len
);
1338 /* unbalanced or unassigned, send through primary */
1339 tx_slave
= bond
->curr_active_slave
;
1340 bond_info
->unbalanced_load
+= skb
->len
;
1343 if (tx_slave
&& SLAVE_IS_OK(tx_slave
)) {
1344 if (tx_slave
!= bond
->curr_active_slave
) {
1345 memcpy(eth_data
->h_source
,
1346 tx_slave
->dev
->dev_addr
,
1350 res
= bond_dev_queue_xmit(bond
, skb
, tx_slave
->dev
);
1353 _lock_tx_hashtbl(bond
);
1354 __tlb_clear_slave(bond
, tx_slave
, 0);
1355 _unlock_tx_hashtbl(bond
);
1360 /* no suitable interface, frame not sent */
1363 read_unlock(&bond
->curr_slave_lock
);
1365 return NETDEV_TX_OK
;
1368 void bond_alb_monitor(struct work_struct
*work
)
1370 struct bonding
*bond
= container_of(work
, struct bonding
,
1372 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1373 struct slave
*slave
;
1376 read_lock(&bond
->lock
);
1378 if (bond
->slave_cnt
== 0) {
1379 bond_info
->tx_rebalance_counter
= 0;
1380 bond_info
->lp_counter
= 0;
1384 bond_info
->tx_rebalance_counter
++;
1385 bond_info
->lp_counter
++;
1387 /* send learning packets */
1388 if (bond_info
->lp_counter
>= BOND_ALB_LP_TICKS
) {
1389 /* change of curr_active_slave involves swapping of mac addresses.
1390 * in order to avoid this swapping from happening while
1391 * sending the learning packets, the curr_slave_lock must be held for
1394 read_lock(&bond
->curr_slave_lock
);
1396 bond_for_each_slave(bond
, slave
, i
) {
1397 alb_send_learning_packets(slave
, slave
->dev
->dev_addr
);
1400 read_unlock(&bond
->curr_slave_lock
);
1402 bond_info
->lp_counter
= 0;
1405 /* rebalance tx traffic */
1406 if (bond_info
->tx_rebalance_counter
>= BOND_TLB_REBALANCE_TICKS
) {
1408 read_lock(&bond
->curr_slave_lock
);
1410 bond_for_each_slave(bond
, slave
, i
) {
1411 tlb_clear_slave(bond
, slave
, 1);
1412 if (slave
== bond
->curr_active_slave
) {
1413 SLAVE_TLB_INFO(slave
).load
=
1414 bond_info
->unbalanced_load
/
1415 BOND_TLB_REBALANCE_INTERVAL
;
1416 bond_info
->unbalanced_load
= 0;
1420 read_unlock(&bond
->curr_slave_lock
);
1422 bond_info
->tx_rebalance_counter
= 0;
1425 /* handle rlb stuff */
1426 if (bond_info
->rlb_enabled
) {
1427 if (bond_info
->primary_is_promisc
&&
1428 (++bond_info
->rlb_promisc_timeout_counter
>= RLB_PROMISC_TIMEOUT
)) {
1431 * dev_set_promiscuity requires rtnl and
1432 * nothing else. Avoid race with bond_close.
1434 read_unlock(&bond
->lock
);
1435 if (!rtnl_trylock()) {
1436 read_lock(&bond
->lock
);
1440 bond_info
->rlb_promisc_timeout_counter
= 0;
1442 /* If the primary was set to promiscuous mode
1443 * because a slave was disabled then
1444 * it can now leave promiscuous mode.
1446 dev_set_promiscuity(bond
->curr_active_slave
->dev
, -1);
1447 bond_info
->primary_is_promisc
= 0;
1450 read_lock(&bond
->lock
);
1453 if (bond_info
->rlb_rebalance
) {
1454 bond_info
->rlb_rebalance
= 0;
1455 rlb_rebalance(bond
);
1458 /* check if clients need updating */
1459 if (bond_info
->rx_ntt
) {
1460 if (bond_info
->rlb_update_delay_counter
) {
1461 --bond_info
->rlb_update_delay_counter
;
1463 rlb_update_rx_clients(bond
);
1464 if (bond_info
->rlb_update_retry_counter
) {
1465 --bond_info
->rlb_update_retry_counter
;
1467 bond_info
->rx_ntt
= 0;
1474 queue_delayed_work(bond
->wq
, &bond
->alb_work
, alb_delta_in_ticks
);
1476 read_unlock(&bond
->lock
);
1479 /* assumption: called before the slave is attached to the bond
1480 * and not locked by the bond lock
1482 int bond_alb_init_slave(struct bonding
*bond
, struct slave
*slave
)
1486 res
= alb_set_slave_mac_addr(slave
, slave
->perm_hwaddr
);
1491 /* caller must hold the bond lock for write since the mac addresses
1492 * are compared and may be swapped.
1494 read_lock(&bond
->lock
);
1496 res
= alb_handle_addr_collision_on_attach(bond
, slave
);
1498 read_unlock(&bond
->lock
);
1504 tlb_init_slave(slave
);
1506 /* order a rebalance ASAP */
1507 bond
->alb_info
.tx_rebalance_counter
= BOND_TLB_REBALANCE_TICKS
;
1509 if (bond
->alb_info
.rlb_enabled
) {
1510 bond
->alb_info
.rlb_rebalance
= 1;
1517 * Remove slave from tlb and rlb hash tables, and fix up MAC addresses
1520 * Caller must hold RTNL and no other locks
1522 void bond_alb_deinit_slave(struct bonding
*bond
, struct slave
*slave
)
1524 if (bond
->slave_cnt
> 1) {
1525 alb_change_hw_addr_on_detach(bond
, slave
);
1528 tlb_clear_slave(bond
, slave
, 0);
1530 if (bond
->alb_info
.rlb_enabled
) {
1531 bond
->alb_info
.next_rx_slave
= NULL
;
1532 rlb_clear_slave(bond
, slave
);
1536 /* Caller must hold bond lock for read */
1537 void bond_alb_handle_link_change(struct bonding
*bond
, struct slave
*slave
, char link
)
1539 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1541 if (link
== BOND_LINK_DOWN
) {
1542 tlb_clear_slave(bond
, slave
, 0);
1543 if (bond
->alb_info
.rlb_enabled
) {
1544 rlb_clear_slave(bond
, slave
);
1546 } else if (link
== BOND_LINK_UP
) {
1547 /* order a rebalance ASAP */
1548 bond_info
->tx_rebalance_counter
= BOND_TLB_REBALANCE_TICKS
;
1549 if (bond
->alb_info
.rlb_enabled
) {
1550 bond
->alb_info
.rlb_rebalance
= 1;
1551 /* If the updelay module parameter is smaller than the
1552 * forwarding delay of the switch the rebalance will
1553 * not work because the rebalance arp replies will
1554 * not be forwarded to the clients..
1561 * bond_alb_handle_active_change - assign new curr_active_slave
1562 * @bond: our bonding struct
1563 * @new_slave: new slave to assign
1565 * Set the bond->curr_active_slave to @new_slave and handle
1566 * mac address swapping and promiscuity changes as needed.
1568 * If new_slave is NULL, caller must hold curr_slave_lock or
1569 * bond->lock for write.
1571 * If new_slave is not NULL, caller must hold RTNL, bond->lock for
1572 * read and curr_slave_lock for write. Processing here may sleep, so
1573 * no other locks may be held.
1575 void bond_alb_handle_active_change(struct bonding
*bond
, struct slave
*new_slave
)
1576 __releases(&bond
->curr_slave_lock
)
1577 __releases(&bond
->lock
)
1578 __acquires(&bond
->lock
)
1579 __acquires(&bond
->curr_slave_lock
)
1581 struct slave
*swap_slave
;
1584 if (bond
->curr_active_slave
== new_slave
) {
1588 if (bond
->curr_active_slave
&& bond
->alb_info
.primary_is_promisc
) {
1589 dev_set_promiscuity(bond
->curr_active_slave
->dev
, -1);
1590 bond
->alb_info
.primary_is_promisc
= 0;
1591 bond
->alb_info
.rlb_promisc_timeout_counter
= 0;
1594 swap_slave
= bond
->curr_active_slave
;
1595 bond
->curr_active_slave
= new_slave
;
1597 if (!new_slave
|| (bond
->slave_cnt
== 0)) {
1601 /* set the new curr_active_slave to the bonds mac address
1602 * i.e. swap mac addresses of old curr_active_slave and new curr_active_slave
1605 struct slave
*tmp_slave
;
1606 /* find slave that is holding the bond's mac address */
1607 bond_for_each_slave(bond
, tmp_slave
, i
) {
1608 if (ether_addr_equal_64bits(tmp_slave
->dev
->dev_addr
,
1609 bond
->dev
->dev_addr
)) {
1610 swap_slave
= tmp_slave
;
1617 * Arrange for swap_slave and new_slave to temporarily be
1618 * ignored so we can mess with their MAC addresses without
1619 * fear of interference from transmit activity.
1622 tlb_clear_slave(bond
, swap_slave
, 1);
1624 tlb_clear_slave(bond
, new_slave
, 1);
1626 write_unlock_bh(&bond
->curr_slave_lock
);
1627 read_unlock(&bond
->lock
);
1631 /* curr_active_slave must be set before calling alb_swap_mac_addr */
1633 /* swap mac address */
1634 alb_swap_mac_addr(bond
, swap_slave
, new_slave
);
1636 /* set the new_slave to the bond mac address */
1637 alb_set_slave_mac_addr(new_slave
, bond
->dev
->dev_addr
);
1641 alb_fasten_mac_swap(bond
, swap_slave
, new_slave
);
1642 read_lock(&bond
->lock
);
1644 read_lock(&bond
->lock
);
1645 alb_send_learning_packets(new_slave
, bond
->dev
->dev_addr
);
1648 write_lock_bh(&bond
->curr_slave_lock
);
1654 int bond_alb_set_mac_address(struct net_device
*bond_dev
, void *addr
)
1655 __acquires(&bond
->lock
)
1656 __releases(&bond
->lock
)
1658 struct bonding
*bond
= netdev_priv(bond_dev
);
1659 struct sockaddr
*sa
= addr
;
1660 struct slave
*slave
, *swap_slave
;
1664 if (!is_valid_ether_addr(sa
->sa_data
)) {
1665 return -EADDRNOTAVAIL
;
1668 res
= alb_set_mac_address(bond
, addr
);
1673 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
1675 /* If there is no curr_active_slave there is nothing else to do.
1676 * Otherwise we'll need to pass the new address to it and handle
1679 if (!bond
->curr_active_slave
) {
1685 bond_for_each_slave(bond
, slave
, i
) {
1686 if (ether_addr_equal_64bits(slave
->dev
->dev_addr
,
1687 bond_dev
->dev_addr
)) {
1694 alb_swap_mac_addr(bond
, swap_slave
, bond
->curr_active_slave
);
1695 alb_fasten_mac_swap(bond
, swap_slave
, bond
->curr_active_slave
);
1697 alb_set_slave_mac_addr(bond
->curr_active_slave
, bond_dev
->dev_addr
);
1699 read_lock(&bond
->lock
);
1700 alb_send_learning_packets(bond
->curr_active_slave
, bond_dev
->dev_addr
);
1701 if (bond
->alb_info
.rlb_enabled
) {
1702 /* inform clients mac address has changed */
1703 rlb_req_update_slave_clients(bond
, bond
->curr_active_slave
);
1705 read_unlock(&bond
->lock
);
1711 void bond_alb_clear_vlan(struct bonding
*bond
, unsigned short vlan_id
)
1713 if (bond
->alb_info
.current_alb_vlan
&&
1714 (bond
->alb_info
.current_alb_vlan
->vlan_id
== vlan_id
)) {
1715 bond
->alb_info
.current_alb_vlan
= NULL
;
1718 if (bond
->alb_info
.rlb_enabled
) {
1719 rlb_clear_vlan(bond
, vlan_id
);