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.
24 * 2003/06/25 - Shmulik Hen <shmulik.hen at intel dot com>
25 * - Fixed signed/unsigned calculation errors that caused load sharing
26 * to collapse to one slave under very heavy UDP Tx stress.
28 * 2003/08/06 - Amir Noam <amir.noam at intel dot com>
29 * - Add support for setting bond's MAC address with special
30 * handling required for ALB/TLB.
32 * 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com>
33 * - Code cleanup and style changes
35 * 2003/12/30 - Amir Noam <amir.noam at intel dot com>
36 * - Fixed: Cannot remove and re-enslave the original active slave.
38 * 2004/01/14 - Shmulik Hen <shmulik.hen at intel dot com>
39 * - Add capability to tag self generated packets in ALB/TLB modes.
42 //#define BONDING_DEBUG 1
44 #include <linux/skbuff.h>
45 #include <linux/netdevice.h>
46 #include <linux/etherdevice.h>
47 #include <linux/pkt_sched.h>
48 #include <linux/spinlock.h>
49 #include <linux/slab.h>
50 #include <linux/timer.h>
52 #include <linux/ipv6.h>
53 #include <linux/if_arp.h>
54 #include <linux/if_ether.h>
55 #include <linux/if_bonding.h>
56 #include <linux/if_vlan.h>
59 #include <asm/byteorder.h>
64 #define ALB_TIMER_TICKS_PER_SEC 10 /* should be a divisor of HZ */
65 #define BOND_TLB_REBALANCE_INTERVAL 10 /* In seconds, periodic re-balancing.
66 * Used for division - never set
69 #define BOND_ALB_LP_INTERVAL 1 /* In seconds, periodic send of
70 * learning packets to the switch
73 #define BOND_TLB_REBALANCE_TICKS (BOND_TLB_REBALANCE_INTERVAL \
74 * ALB_TIMER_TICKS_PER_SEC)
76 #define BOND_ALB_LP_TICKS (BOND_ALB_LP_INTERVAL \
77 * ALB_TIMER_TICKS_PER_SEC)
79 #define TLB_HASH_TABLE_SIZE 256 /* The size of the clients hash table.
80 * Note that this value MUST NOT be smaller
81 * because the key hash table is BYTE wide !
85 #define TLB_NULL_INDEX 0xffffffff
86 #define MAX_LP_BURST 3
89 #define RLB_HASH_TABLE_SIZE 256
90 #define RLB_NULL_INDEX 0xffffffff
91 #define RLB_UPDATE_DELAY 2*ALB_TIMER_TICKS_PER_SEC /* 2 seconds */
92 #define RLB_ARP_BURST_SIZE 2
93 #define RLB_UPDATE_RETRY 3 /* 3-ticks - must be smaller than the rlb
94 * rebalance interval (5 min).
96 /* RLB_PROMISC_TIMEOUT = 10 sec equals the time that the current slave is
97 * promiscuous after failover
99 #define RLB_PROMISC_TIMEOUT 10*ALB_TIMER_TICKS_PER_SEC
101 static const u8 mac_bcast
[ETH_ALEN
] = {0xff,0xff,0xff,0xff,0xff,0xff};
102 static const int alb_delta_in_ticks
= HZ
/ ALB_TIMER_TICKS_PER_SEC
;
105 struct learning_pkt
{
106 u8 mac_dst
[ETH_ALEN
];
107 u8 mac_src
[ETH_ALEN
];
109 u8 padding
[ETH_ZLEN
- ETH_HLEN
];
118 u8 mac_src
[ETH_ALEN
]; /* sender hardware address */
119 u32 ip_src
; /* sender IP address */
120 u8 mac_dst
[ETH_ALEN
]; /* target hardware address */
121 u32 ip_dst
; /* target IP address */
125 /* Forward declaration */
126 static void alb_send_learning_packets(struct slave
*slave
, u8 mac_addr
[]);
128 static inline u8
_simple_hash(u8
*hash_start
, int hash_size
)
133 for (i
= 0; i
< hash_size
; i
++) {
134 hash
^= hash_start
[i
];
140 /*********************** tlb specific functions ***************************/
142 static inline void _lock_tx_hashtbl(struct bonding
*bond
)
144 spin_lock(&(BOND_ALB_INFO(bond
).tx_hashtbl_lock
));
147 static inline void _unlock_tx_hashtbl(struct bonding
*bond
)
149 spin_unlock(&(BOND_ALB_INFO(bond
).tx_hashtbl_lock
));
152 /* Caller must hold tx_hashtbl lock */
153 static inline void tlb_init_table_entry(struct tlb_client_info
*entry
, int save_load
)
156 entry
->load_history
= 1 + entry
->tx_bytes
/
157 BOND_TLB_REBALANCE_INTERVAL
;
161 entry
->tx_slave
= NULL
;
162 entry
->next
= TLB_NULL_INDEX
;
163 entry
->prev
= TLB_NULL_INDEX
;
166 static inline void tlb_init_slave(struct slave
*slave
)
168 SLAVE_TLB_INFO(slave
).load
= 0;
169 SLAVE_TLB_INFO(slave
).head
= TLB_NULL_INDEX
;
172 /* Caller must hold bond lock for read */
173 static void tlb_clear_slave(struct bonding
*bond
, struct slave
*slave
, int save_load
)
175 struct tlb_client_info
*tx_hash_table
;
178 _lock_tx_hashtbl(bond
);
180 /* clear slave from tx_hashtbl */
181 tx_hash_table
= BOND_ALB_INFO(bond
).tx_hashtbl
;
183 index
= SLAVE_TLB_INFO(slave
).head
;
184 while (index
!= TLB_NULL_INDEX
) {
185 u32 next_index
= tx_hash_table
[index
].next
;
186 tlb_init_table_entry(&tx_hash_table
[index
], save_load
);
190 _unlock_tx_hashtbl(bond
);
192 tlb_init_slave(slave
);
195 /* Must be called before starting the monitor timer */
196 static int tlb_initialize(struct bonding
*bond
)
198 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
199 int size
= TLB_HASH_TABLE_SIZE
* sizeof(struct tlb_client_info
);
202 spin_lock_init(&(bond_info
->tx_hashtbl_lock
));
204 _lock_tx_hashtbl(bond
);
206 bond_info
->tx_hashtbl
= kmalloc(size
, GFP_KERNEL
);
207 if (!bond_info
->tx_hashtbl
) {
208 printk(KERN_ERR DRV_NAME
209 ": Error: %s: Failed to allocate TLB hash table\n",
211 _unlock_tx_hashtbl(bond
);
215 memset(bond_info
->tx_hashtbl
, 0, size
);
217 for (i
= 0; i
< TLB_HASH_TABLE_SIZE
; i
++) {
218 tlb_init_table_entry(&bond_info
->tx_hashtbl
[i
], 1);
221 _unlock_tx_hashtbl(bond
);
226 /* Must be called only after all slaves have been released */
227 static void tlb_deinitialize(struct bonding
*bond
)
229 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
231 _lock_tx_hashtbl(bond
);
233 kfree(bond_info
->tx_hashtbl
);
234 bond_info
->tx_hashtbl
= NULL
;
236 _unlock_tx_hashtbl(bond
);
239 /* Caller must hold bond lock for read */
240 static struct slave
*tlb_get_least_loaded_slave(struct bonding
*bond
)
242 struct slave
*slave
, *least_loaded
;
246 /* Find the first enabled slave */
247 bond_for_each_slave(bond
, slave
, i
) {
248 if (SLAVE_IS_OK(slave
)) {
258 least_loaded
= slave
;
259 max_gap
= (s64
)(slave
->speed
<< 20) - /* Convert to Megabit per sec */
260 (s64
)(SLAVE_TLB_INFO(slave
).load
<< 3); /* Bytes to bits */
262 /* Find the slave with the largest gap */
263 bond_for_each_slave_from(bond
, slave
, i
, least_loaded
) {
264 if (SLAVE_IS_OK(slave
)) {
265 s64 gap
= (s64
)(slave
->speed
<< 20) -
266 (s64
)(SLAVE_TLB_INFO(slave
).load
<< 3);
268 least_loaded
= slave
;
277 /* Caller must hold bond lock for read */
278 struct slave
*tlb_choose_channel(struct bonding
*bond
, u32 hash_index
, u32 skb_len
)
280 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
281 struct tlb_client_info
*hash_table
;
282 struct slave
*assigned_slave
;
284 _lock_tx_hashtbl(bond
);
286 hash_table
= bond_info
->tx_hashtbl
;
287 assigned_slave
= hash_table
[hash_index
].tx_slave
;
288 if (!assigned_slave
) {
289 assigned_slave
= tlb_get_least_loaded_slave(bond
);
291 if (assigned_slave
) {
292 struct tlb_slave_info
*slave_info
=
293 &(SLAVE_TLB_INFO(assigned_slave
));
294 u32 next_index
= slave_info
->head
;
296 hash_table
[hash_index
].tx_slave
= assigned_slave
;
297 hash_table
[hash_index
].next
= next_index
;
298 hash_table
[hash_index
].prev
= TLB_NULL_INDEX
;
300 if (next_index
!= TLB_NULL_INDEX
) {
301 hash_table
[next_index
].prev
= hash_index
;
304 slave_info
->head
= hash_index
;
306 hash_table
[hash_index
].load_history
;
310 if (assigned_slave
) {
311 hash_table
[hash_index
].tx_bytes
+= skb_len
;
314 _unlock_tx_hashtbl(bond
);
316 return assigned_slave
;
319 /*********************** rlb specific functions ***************************/
320 static inline void _lock_rx_hashtbl(struct bonding
*bond
)
322 spin_lock(&(BOND_ALB_INFO(bond
).rx_hashtbl_lock
));
325 static inline void _unlock_rx_hashtbl(struct bonding
*bond
)
327 spin_unlock(&(BOND_ALB_INFO(bond
).rx_hashtbl_lock
));
330 /* when an ARP REPLY is received from a client update its info
333 static void rlb_update_entry_from_arp(struct bonding
*bond
, struct arp_pkt
*arp
)
335 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
336 struct rlb_client_info
*client_info
;
339 _lock_rx_hashtbl(bond
);
341 hash_index
= _simple_hash((u8
*)&(arp
->ip_src
), sizeof(arp
->ip_src
));
342 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
344 if ((client_info
->assigned
) &&
345 (client_info
->ip_src
== arp
->ip_dst
) &&
346 (client_info
->ip_dst
== arp
->ip_src
)) {
347 /* update the clients MAC address */
348 memcpy(client_info
->mac_dst
, arp
->mac_src
, ETH_ALEN
);
349 client_info
->ntt
= 1;
350 bond_info
->rx_ntt
= 1;
353 _unlock_rx_hashtbl(bond
);
356 static int rlb_arp_recv(struct sk_buff
*skb
, struct net_device
*bond_dev
, struct packet_type
*ptype
)
358 struct bonding
*bond
= bond_dev
->priv
;
359 struct arp_pkt
*arp
= (struct arp_pkt
*)skb
->data
;
360 int res
= NET_RX_DROP
;
362 if (!(bond_dev
->flags
& IFF_MASTER
)) {
367 dprintk("Packet has no ARP data\n");
371 if (skb
->len
< sizeof(struct arp_pkt
)) {
372 dprintk("Packet is too small to be an ARP\n");
376 if (arp
->op_code
== htons(ARPOP_REPLY
)) {
377 /* update rx hash table for this ARP */
378 rlb_update_entry_from_arp(bond
, arp
);
379 dprintk("Server received an ARP Reply from client\n");
382 res
= NET_RX_SUCCESS
;
390 /* Caller must hold bond lock for read */
391 static struct slave
*rlb_next_rx_slave(struct bonding
*bond
)
393 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
394 struct slave
*rx_slave
, *slave
, *start_at
;
397 if (bond_info
->next_rx_slave
) {
398 start_at
= bond_info
->next_rx_slave
;
400 start_at
= bond
->first_slave
;
405 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
406 if (SLAVE_IS_OK(slave
)) {
409 } else if (slave
->speed
> rx_slave
->speed
) {
416 bond_info
->next_rx_slave
= rx_slave
->next
;
422 /* teach the switch the mac of a disabled slave
423 * on the primary for fault tolerance
425 * Caller must hold bond->curr_slave_lock for write or bond lock for write
427 static void rlb_teach_disabled_mac_on_primary(struct bonding
*bond
, u8 addr
[])
429 if (!bond
->curr_active_slave
) {
433 if (!bond
->alb_info
.primary_is_promisc
) {
434 bond
->alb_info
.primary_is_promisc
= 1;
435 dev_set_promiscuity(bond
->curr_active_slave
->dev
, 1);
438 bond
->alb_info
.rlb_promisc_timeout_counter
= 0;
440 alb_send_learning_packets(bond
->curr_active_slave
, addr
);
443 /* slave being removed should not be active at this point
445 * Caller must hold bond lock for read
447 static void rlb_clear_slave(struct bonding
*bond
, struct slave
*slave
)
449 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
450 struct rlb_client_info
*rx_hash_table
;
451 u32 index
, next_index
;
453 /* clear slave from rx_hashtbl */
454 _lock_rx_hashtbl(bond
);
456 rx_hash_table
= bond_info
->rx_hashtbl
;
457 index
= bond_info
->rx_hashtbl_head
;
458 for (; index
!= RLB_NULL_INDEX
; index
= next_index
) {
459 next_index
= rx_hash_table
[index
].next
;
460 if (rx_hash_table
[index
].slave
== slave
) {
461 struct slave
*assigned_slave
= rlb_next_rx_slave(bond
);
463 if (assigned_slave
) {
464 rx_hash_table
[index
].slave
= assigned_slave
;
465 if (memcmp(rx_hash_table
[index
].mac_dst
,
466 mac_bcast
, ETH_ALEN
)) {
467 bond_info
->rx_hashtbl
[index
].ntt
= 1;
468 bond_info
->rx_ntt
= 1;
469 /* A slave has been removed from the
470 * table because it is either disabled
471 * or being released. We must retry the
472 * update to avoid clients from not
473 * being updated & disconnecting when
476 bond_info
->rlb_update_retry_counter
=
479 } else { /* there is no active slave */
480 rx_hash_table
[index
].slave
= NULL
;
485 _unlock_rx_hashtbl(bond
);
487 write_lock(&bond
->curr_slave_lock
);
489 if (slave
!= bond
->curr_active_slave
) {
490 rlb_teach_disabled_mac_on_primary(bond
, slave
->dev
->dev_addr
);
493 write_unlock(&bond
->curr_slave_lock
);
496 static void rlb_update_client(struct rlb_client_info
*client_info
)
500 if (!client_info
->slave
) {
504 for (i
= 0; i
< RLB_ARP_BURST_SIZE
; i
++) {
507 skb
= arp_create(ARPOP_REPLY
, ETH_P_ARP
,
509 client_info
->slave
->dev
,
511 client_info
->mac_dst
,
512 client_info
->slave
->dev
->dev_addr
,
513 client_info
->mac_dst
);
515 printk(KERN_ERR DRV_NAME
516 ": Error: failed to create an ARP packet\n");
520 skb
->dev
= client_info
->slave
->dev
;
522 if (client_info
->tag
) {
523 skb
= vlan_put_tag(skb
, client_info
->vlan_id
);
525 printk(KERN_ERR DRV_NAME
526 ": Error: failed to insert VLAN tag\n");
535 /* sends ARP REPLIES that update the clients that need updating */
536 static void rlb_update_rx_clients(struct bonding
*bond
)
538 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
539 struct rlb_client_info
*client_info
;
542 _lock_rx_hashtbl(bond
);
544 hash_index
= bond_info
->rx_hashtbl_head
;
545 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
546 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
547 if (client_info
->ntt
) {
548 rlb_update_client(client_info
);
549 if (bond_info
->rlb_update_retry_counter
== 0) {
550 client_info
->ntt
= 0;
555 /* do not update the entries again untill this counter is zero so that
556 * not to confuse the clients.
558 bond_info
->rlb_update_delay_counter
= RLB_UPDATE_DELAY
;
560 _unlock_rx_hashtbl(bond
);
563 /* The slave was assigned a new mac address - update the clients */
564 static void rlb_req_update_slave_clients(struct bonding
*bond
, struct slave
*slave
)
566 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
567 struct rlb_client_info
*client_info
;
571 _lock_rx_hashtbl(bond
);
573 hash_index
= bond_info
->rx_hashtbl_head
;
574 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
575 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
577 if ((client_info
->slave
== slave
) &&
578 memcmp(client_info
->mac_dst
, mac_bcast
, ETH_ALEN
)) {
579 client_info
->ntt
= 1;
584 // update the team's flag only after the whole iteration
586 bond_info
->rx_ntt
= 1;
588 bond_info
->rlb_update_retry_counter
= RLB_UPDATE_RETRY
;
591 _unlock_rx_hashtbl(bond
);
594 /* mark all clients using src_ip to be updated */
595 static void rlb_req_update_subnet_clients(struct bonding
*bond
, u32 src_ip
)
597 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
598 struct rlb_client_info
*client_info
;
601 _lock_rx_hashtbl(bond
);
603 hash_index
= bond_info
->rx_hashtbl_head
;
604 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
605 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
607 if (!client_info
->slave
) {
608 printk(KERN_ERR DRV_NAME
609 ": Error: found a client with no channel in "
610 "the client's hash table\n");
613 /*update all clients using this src_ip, that are not assigned
614 * to the team's address (curr_active_slave) and have a known
615 * unicast mac address.
617 if ((client_info
->ip_src
== src_ip
) &&
618 memcmp(client_info
->slave
->dev
->dev_addr
,
619 bond
->dev
->dev_addr
, ETH_ALEN
) &&
620 memcmp(client_info
->mac_dst
, mac_bcast
, ETH_ALEN
)) {
621 client_info
->ntt
= 1;
622 bond_info
->rx_ntt
= 1;
626 _unlock_rx_hashtbl(bond
);
629 /* Caller must hold both bond and ptr locks for read */
630 struct slave
*rlb_choose_channel(struct sk_buff
*skb
, struct bonding
*bond
)
632 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
633 struct arp_pkt
*arp
= (struct arp_pkt
*)skb
->nh
.raw
;
634 struct slave
*assigned_slave
;
635 struct rlb_client_info
*client_info
;
638 _lock_rx_hashtbl(bond
);
640 hash_index
= _simple_hash((u8
*)&arp
->ip_dst
, sizeof(arp
->ip_src
));
641 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
643 if (client_info
->assigned
) {
644 if ((client_info
->ip_src
== arp
->ip_src
) &&
645 (client_info
->ip_dst
== arp
->ip_dst
)) {
646 /* the entry is already assigned to this client */
647 if (memcmp(arp
->mac_dst
, mac_bcast
, ETH_ALEN
)) {
648 /* update mac address from arp */
649 memcpy(client_info
->mac_dst
, arp
->mac_dst
, ETH_ALEN
);
652 assigned_slave
= client_info
->slave
;
653 if (assigned_slave
) {
654 _unlock_rx_hashtbl(bond
);
655 return assigned_slave
;
658 /* the entry is already assigned to some other client,
659 * move the old client to primary (curr_active_slave) so
660 * that the new client can be assigned to this entry.
662 if (bond
->curr_active_slave
&&
663 client_info
->slave
!= bond
->curr_active_slave
) {
664 client_info
->slave
= bond
->curr_active_slave
;
665 rlb_update_client(client_info
);
669 /* assign a new slave */
670 assigned_slave
= rlb_next_rx_slave(bond
);
672 if (assigned_slave
) {
673 client_info
->ip_src
= arp
->ip_src
;
674 client_info
->ip_dst
= arp
->ip_dst
;
675 /* arp->mac_dst is broadcast for arp reqeusts.
676 * will be updated with clients actual unicast mac address
677 * upon receiving an arp reply.
679 memcpy(client_info
->mac_dst
, arp
->mac_dst
, ETH_ALEN
);
680 client_info
->slave
= assigned_slave
;
682 if (memcmp(client_info
->mac_dst
, mac_bcast
, ETH_ALEN
)) {
683 client_info
->ntt
= 1;
684 bond
->alb_info
.rx_ntt
= 1;
686 client_info
->ntt
= 0;
689 if (!list_empty(&bond
->vlan_list
)) {
690 unsigned short vlan_id
;
691 int res
= vlan_get_tag(skb
, &vlan_id
);
693 client_info
->tag
= 1;
694 client_info
->vlan_id
= vlan_id
;
698 if (!client_info
->assigned
) {
699 u32 prev_tbl_head
= bond_info
->rx_hashtbl_head
;
700 bond_info
->rx_hashtbl_head
= hash_index
;
701 client_info
->next
= prev_tbl_head
;
702 if (prev_tbl_head
!= RLB_NULL_INDEX
) {
703 bond_info
->rx_hashtbl
[prev_tbl_head
].prev
=
706 client_info
->assigned
= 1;
710 _unlock_rx_hashtbl(bond
);
712 return assigned_slave
;
715 /* chooses (and returns) transmit channel for arp reply
716 * does not choose channel for other arp types since they are
717 * sent on the curr_active_slave
719 static struct slave
*rlb_arp_xmit(struct sk_buff
*skb
, struct bonding
*bond
)
721 struct arp_pkt
*arp
= (struct arp_pkt
*)skb
->nh
.raw
;
722 struct slave
*tx_slave
= NULL
;
724 if (arp
->op_code
== __constant_htons(ARPOP_REPLY
)) {
725 /* the arp must be sent on the selected
728 tx_slave
= rlb_choose_channel(skb
, bond
);
730 memcpy(arp
->mac_src
,tx_slave
->dev
->dev_addr
, ETH_ALEN
);
732 dprintk("Server sent ARP Reply packet\n");
733 } else if (arp
->op_code
== __constant_htons(ARPOP_REQUEST
)) {
734 /* Create an entry in the rx_hashtbl for this client as a
736 * When the arp reply is received the entry will be updated
737 * with the correct unicast address of the client.
739 rlb_choose_channel(skb
, bond
);
741 /* The ARP relpy packets must be delayed so that
742 * they can cancel out the influence of the ARP request.
744 bond
->alb_info
.rlb_update_delay_counter
= RLB_UPDATE_DELAY
;
746 /* arp requests are broadcast and are sent on the primary
747 * the arp request will collapse all clients on the subnet to
748 * the primary slave. We must register these clients to be
749 * updated with their assigned mac.
751 rlb_req_update_subnet_clients(bond
, arp
->ip_src
);
752 dprintk("Server sent ARP Request packet\n");
758 /* Caller must hold bond lock for read */
759 static void rlb_rebalance(struct bonding
*bond
)
761 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
762 struct slave
*assigned_slave
;
763 struct rlb_client_info
*client_info
;
767 _lock_rx_hashtbl(bond
);
770 hash_index
= bond_info
->rx_hashtbl_head
;
771 for (; hash_index
!= RLB_NULL_INDEX
; hash_index
= client_info
->next
) {
772 client_info
= &(bond_info
->rx_hashtbl
[hash_index
]);
773 assigned_slave
= rlb_next_rx_slave(bond
);
774 if (assigned_slave
&& (client_info
->slave
!= assigned_slave
)) {
775 client_info
->slave
= assigned_slave
;
776 client_info
->ntt
= 1;
781 /* update the team's flag only after the whole iteration */
783 bond_info
->rx_ntt
= 1;
785 _unlock_rx_hashtbl(bond
);
788 /* Caller must hold rx_hashtbl lock */
789 static void rlb_init_table_entry(struct rlb_client_info
*entry
)
791 memset(entry
, 0, sizeof(struct rlb_client_info
));
792 entry
->next
= RLB_NULL_INDEX
;
793 entry
->prev
= RLB_NULL_INDEX
;
796 static int rlb_initialize(struct bonding
*bond
)
798 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
799 struct packet_type
*pk_type
= &(BOND_ALB_INFO(bond
).rlb_pkt_type
);
800 int size
= RLB_HASH_TABLE_SIZE
* sizeof(struct rlb_client_info
);
803 spin_lock_init(&(bond_info
->rx_hashtbl_lock
));
805 _lock_rx_hashtbl(bond
);
807 bond_info
->rx_hashtbl
= kmalloc(size
, GFP_KERNEL
);
808 if (!bond_info
->rx_hashtbl
) {
809 printk(KERN_ERR DRV_NAME
810 ": Error: %s: Failed to allocate RLB hash table\n",
812 _unlock_rx_hashtbl(bond
);
816 bond_info
->rx_hashtbl_head
= RLB_NULL_INDEX
;
818 for (i
= 0; i
< RLB_HASH_TABLE_SIZE
; i
++) {
819 rlb_init_table_entry(bond_info
->rx_hashtbl
+ i
);
822 _unlock_rx_hashtbl(bond
);
824 /*initialize packet type*/
825 pk_type
->type
= __constant_htons(ETH_P_ARP
);
826 pk_type
->dev
= bond
->dev
;
827 pk_type
->func
= rlb_arp_recv
;
829 /* register to receive ARPs */
830 dev_add_pack(pk_type
);
835 static void rlb_deinitialize(struct bonding
*bond
)
837 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
839 dev_remove_pack(&(bond_info
->rlb_pkt_type
));
841 _lock_rx_hashtbl(bond
);
843 kfree(bond_info
->rx_hashtbl
);
844 bond_info
->rx_hashtbl
= NULL
;
845 bond_info
->rx_hashtbl_head
= RLB_NULL_INDEX
;
847 _unlock_rx_hashtbl(bond
);
850 static void rlb_clear_vlan(struct bonding
*bond
, unsigned short vlan_id
)
852 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
855 _lock_rx_hashtbl(bond
);
857 curr_index
= bond_info
->rx_hashtbl_head
;
858 while (curr_index
!= RLB_NULL_INDEX
) {
859 struct rlb_client_info
*curr
= &(bond_info
->rx_hashtbl
[curr_index
]);
860 u32 next_index
= bond_info
->rx_hashtbl
[curr_index
].next
;
861 u32 prev_index
= bond_info
->rx_hashtbl
[curr_index
].prev
;
863 if (curr
->tag
&& (curr
->vlan_id
== vlan_id
)) {
864 if (curr_index
== bond_info
->rx_hashtbl_head
) {
865 bond_info
->rx_hashtbl_head
= next_index
;
867 if (prev_index
!= RLB_NULL_INDEX
) {
868 bond_info
->rx_hashtbl
[prev_index
].next
= next_index
;
870 if (next_index
!= RLB_NULL_INDEX
) {
871 bond_info
->rx_hashtbl
[next_index
].prev
= prev_index
;
874 rlb_init_table_entry(curr
);
877 curr_index
= next_index
;
880 _unlock_rx_hashtbl(bond
);
883 /*********************** tlb/rlb shared functions *********************/
885 static void alb_send_learning_packets(struct slave
*slave
, u8 mac_addr
[])
887 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
888 struct learning_pkt pkt
;
889 int size
= sizeof(struct learning_pkt
);
892 memset(&pkt
, 0, size
);
893 memcpy(pkt
.mac_dst
, mac_addr
, ETH_ALEN
);
894 memcpy(pkt
.mac_src
, mac_addr
, ETH_ALEN
);
895 pkt
.type
= __constant_htons(ETH_P_LOOP
);
897 for (i
= 0; i
< MAX_LP_BURST
; i
++) {
901 skb
= dev_alloc_skb(size
);
906 data
= skb_put(skb
, size
);
907 memcpy(data
, &pkt
, size
);
910 skb
->nh
.raw
= data
+ ETH_HLEN
;
911 skb
->protocol
= pkt
.type
;
912 skb
->priority
= TC_PRIO_CONTROL
;
913 skb
->dev
= slave
->dev
;
915 if (!list_empty(&bond
->vlan_list
)) {
916 struct vlan_entry
*vlan
;
918 vlan
= bond_next_vlan(bond
,
919 bond
->alb_info
.current_alb_vlan
);
921 bond
->alb_info
.current_alb_vlan
= vlan
;
927 skb
= vlan_put_tag(skb
, vlan
->vlan_id
);
929 printk(KERN_ERR DRV_NAME
930 ": Error: failed to insert VLAN tag\n");
939 /* hw is a boolean parameter that determines whether we should try and
940 * set the hw address of the device as well as the hw address of the
943 static int alb_set_slave_mac_addr(struct slave
*slave
, u8 addr
[], int hw
)
945 struct net_device
*dev
= slave
->dev
;
946 struct sockaddr s_addr
;
949 memcpy(dev
->dev_addr
, addr
, dev
->addr_len
);
953 /* for rlb each slave must have a unique hw mac addresses so that */
954 /* each slave will receive packets destined to a different mac */
955 memcpy(s_addr
.sa_data
, addr
, dev
->addr_len
);
956 s_addr
.sa_family
= dev
->type
;
957 if (dev
->set_mac_address(dev
, &s_addr
)) {
958 printk(KERN_ERR DRV_NAME
959 ": Error: dev->set_mac_address of dev %s failed! ALB "
960 "mode requires that the base driver support setting "
961 "the hw address also when the network device's "
962 "interface is open\n",
969 /* Caller must hold bond lock for write or curr_slave_lock for write*/
970 static void alb_swap_mac_addr(struct bonding
*bond
, struct slave
*slave1
, struct slave
*slave2
)
972 struct slave
*disabled_slave
= NULL
;
973 u8 tmp_mac_addr
[ETH_ALEN
];
974 int slaves_state_differ
;
976 slaves_state_differ
= (SLAVE_IS_OK(slave1
) != SLAVE_IS_OK(slave2
));
978 memcpy(tmp_mac_addr
, slave1
->dev
->dev_addr
, ETH_ALEN
);
979 alb_set_slave_mac_addr(slave1
, slave2
->dev
->dev_addr
, bond
->alb_info
.rlb_enabled
);
980 alb_set_slave_mac_addr(slave2
, tmp_mac_addr
, bond
->alb_info
.rlb_enabled
);
982 /* fasten the change in the switch */
983 if (SLAVE_IS_OK(slave1
)) {
984 alb_send_learning_packets(slave1
, slave1
->dev
->dev_addr
);
985 if (bond
->alb_info
.rlb_enabled
) {
986 /* inform the clients that the mac address
989 rlb_req_update_slave_clients(bond
, slave1
);
992 disabled_slave
= slave1
;
995 if (SLAVE_IS_OK(slave2
)) {
996 alb_send_learning_packets(slave2
, slave2
->dev
->dev_addr
);
997 if (bond
->alb_info
.rlb_enabled
) {
998 /* inform the clients that the mac address
1001 rlb_req_update_slave_clients(bond
, slave2
);
1004 disabled_slave
= slave2
;
1007 if (bond
->alb_info
.rlb_enabled
&& slaves_state_differ
) {
1008 /* A disabled slave was assigned an active mac addr */
1009 rlb_teach_disabled_mac_on_primary(bond
,
1010 disabled_slave
->dev
->dev_addr
);
1015 * alb_change_hw_addr_on_detach
1016 * @bond: bonding we're working on
1017 * @slave: the slave that was just detached
1019 * We assume that @slave was already detached from the slave list.
1021 * If @slave's permanent hw address is different both from its current
1022 * address and from @bond's address, then somewhere in the bond there's
1023 * a slave that has @slave's permanet address as its current address.
1024 * We'll make sure that that slave no longer uses @slave's permanent address.
1026 * Caller must hold bond lock
1028 static void alb_change_hw_addr_on_detach(struct bonding
*bond
, struct slave
*slave
)
1033 perm_curr_diff
= memcmp(slave
->perm_hwaddr
,
1034 slave
->dev
->dev_addr
,
1036 perm_bond_diff
= memcmp(slave
->perm_hwaddr
,
1037 bond
->dev
->dev_addr
,
1040 if (perm_curr_diff
&& perm_bond_diff
) {
1041 struct slave
*tmp_slave
;
1044 bond_for_each_slave(bond
, tmp_slave
, i
) {
1045 if (!memcmp(slave
->perm_hwaddr
,
1046 tmp_slave
->dev
->dev_addr
,
1054 alb_swap_mac_addr(bond
, slave
, tmp_slave
);
1060 * alb_handle_addr_collision_on_attach
1061 * @bond: bonding we're working on
1062 * @slave: the slave that was just attached
1064 * checks uniqueness of slave's mac address and handles the case the
1065 * new slave uses the bonds mac address.
1067 * If the permanent hw address of @slave is @bond's hw address, we need to
1068 * find a different hw address to give @slave, that isn't in use by any other
1069 * slave in the bond. This address must be, of course, one of the premanent
1070 * addresses of the other slaves.
1072 * We go over the slave list, and for each slave there we compare its
1073 * permanent hw address with the current address of all the other slaves.
1074 * If no match was found, then we've found a slave with a permanent address
1075 * that isn't used by any other slave in the bond, so we can assign it to
1078 * assumption: this function is called before @slave is attached to the
1081 * caller must hold the bond lock for write since the mac addresses are compared
1082 * and may be swapped.
1084 static int alb_handle_addr_collision_on_attach(struct bonding
*bond
, struct slave
*slave
)
1086 struct slave
*tmp_slave1
, *tmp_slave2
, *free_mac_slave
;
1087 struct slave
*has_bond_addr
= bond
->curr_active_slave
;
1088 int i
, j
, found
= 0;
1090 if (bond
->slave_cnt
== 0) {
1091 /* this is the first slave */
1095 /* if slave's mac address differs from bond's mac address
1096 * check uniqueness of slave's mac address against the other
1097 * slaves in the bond.
1099 if (memcmp(slave
->perm_hwaddr
, bond
->dev
->dev_addr
, ETH_ALEN
)) {
1100 bond_for_each_slave(bond
, tmp_slave1
, i
) {
1101 if (!memcmp(tmp_slave1
->dev
->dev_addr
, slave
->dev
->dev_addr
,
1109 /* a slave was found that is using the mac address
1112 printk(KERN_ERR DRV_NAME
1113 ": Error: the hw address of slave %s is not "
1114 "unique - cannot enslave it!",
1122 /* The slave's address is equal to the address of the bond.
1123 * Search for a spare address in the bond for this slave.
1125 free_mac_slave
= NULL
;
1127 bond_for_each_slave(bond
, tmp_slave1
, i
) {
1129 bond_for_each_slave(bond
, tmp_slave2
, j
) {
1130 if (!memcmp(tmp_slave1
->perm_hwaddr
,
1131 tmp_slave2
->dev
->dev_addr
,
1139 /* no slave has tmp_slave1's perm addr
1142 free_mac_slave
= tmp_slave1
;
1146 if (!has_bond_addr
) {
1147 if (!memcmp(tmp_slave1
->dev
->dev_addr
,
1148 bond
->dev
->dev_addr
,
1151 has_bond_addr
= tmp_slave1
;
1156 if (free_mac_slave
) {
1157 alb_set_slave_mac_addr(slave
, free_mac_slave
->perm_hwaddr
,
1158 bond
->alb_info
.rlb_enabled
);
1160 printk(KERN_WARNING DRV_NAME
1161 ": Warning: the hw address of slave %s is in use by "
1162 "the bond; giving it the hw address of %s\n",
1163 slave
->dev
->name
, free_mac_slave
->dev
->name
);
1165 } else if (has_bond_addr
) {
1166 printk(KERN_ERR DRV_NAME
1167 ": Error: the hw address of slave %s is in use by the "
1168 "bond; couldn't find a slave with a free hw address to "
1169 "give it (this should not have happened)\n",
1178 * alb_set_mac_address
1182 * In TLB mode all slaves are configured to the bond's hw address, but set
1183 * their dev_addr field to different addresses (based on their permanent hw
1186 * For each slave, this function sets the interface to the new address and then
1187 * changes its dev_addr field to its previous value.
1189 * Unwinding assumes bond's mac address has not yet changed.
1191 static int alb_set_mac_address(struct bonding
*bond
, void *addr
)
1194 struct slave
*slave
, *stop_at
;
1195 char tmp_addr
[ETH_ALEN
];
1199 if (bond
->alb_info
.rlb_enabled
) {
1203 bond_for_each_slave(bond
, slave
, i
) {
1204 if (slave
->dev
->set_mac_address
== NULL
) {
1209 /* save net_device's current hw address */
1210 memcpy(tmp_addr
, slave
->dev
->dev_addr
, ETH_ALEN
);
1212 res
= slave
->dev
->set_mac_address(slave
->dev
, addr
);
1214 /* restore net_device's hw address */
1215 memcpy(slave
->dev
->dev_addr
, tmp_addr
, ETH_ALEN
);
1225 memcpy(sa
.sa_data
, bond
->dev
->dev_addr
, bond
->dev
->addr_len
);
1226 sa
.sa_family
= bond
->dev
->type
;
1228 /* unwind from head to the slave that failed */
1230 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
1231 memcpy(tmp_addr
, slave
->dev
->dev_addr
, ETH_ALEN
);
1232 slave
->dev
->set_mac_address(slave
->dev
, &sa
);
1233 memcpy(slave
->dev
->dev_addr
, tmp_addr
, ETH_ALEN
);
1239 /************************ exported alb funcions ************************/
1241 int bond_alb_initialize(struct bonding
*bond
, int rlb_enabled
)
1245 res
= tlb_initialize(bond
);
1251 bond
->alb_info
.rlb_enabled
= 1;
1252 /* initialize rlb */
1253 res
= rlb_initialize(bond
);
1255 tlb_deinitialize(bond
);
1263 void bond_alb_deinitialize(struct bonding
*bond
)
1265 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1267 tlb_deinitialize(bond
);
1269 if (bond_info
->rlb_enabled
) {
1270 rlb_deinitialize(bond
);
1274 int bond_alb_xmit(struct sk_buff
*skb
, struct net_device
*bond_dev
)
1276 struct bonding
*bond
= bond_dev
->priv
;
1277 struct ethhdr
*eth_data
;
1278 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1279 struct slave
*tx_slave
= NULL
;
1280 static u32 ip_bcast
= 0xffffffff;
1282 int do_tx_balance
= 1;
1284 u8
*hash_start
= NULL
;
1287 skb
->mac
.raw
= (unsigned char *)skb
->data
;
1288 eth_data
= eth_hdr(skb
);
1290 /* make sure that the curr_active_slave and the slaves list do
1291 * not change during tx
1293 read_lock(&bond
->lock
);
1294 read_lock(&bond
->curr_slave_lock
);
1296 if (!BOND_IS_OK(bond
)) {
1300 switch (ntohs(skb
->protocol
)) {
1302 if ((memcmp(eth_data
->h_dest
, mac_bcast
, ETH_ALEN
) == 0) ||
1303 (skb
->nh
.iph
->daddr
== ip_bcast
)) {
1307 hash_start
= (char*)&(skb
->nh
.iph
->daddr
);
1308 hash_size
= sizeof(skb
->nh
.iph
->daddr
);
1311 if (memcmp(eth_data
->h_dest
, mac_bcast
, ETH_ALEN
) == 0) {
1316 hash_start
= (char*)&(skb
->nh
.ipv6h
->daddr
);
1317 hash_size
= sizeof(skb
->nh
.ipv6h
->daddr
);
1320 if (ipx_hdr(skb
)->ipx_checksum
!=
1321 __constant_htons(IPX_NO_CHECKSUM
)) {
1322 /* something is wrong with this packet */
1327 if (ipx_hdr(skb
)->ipx_type
!= IPX_TYPE_NCP
) {
1328 /* The only protocol worth balancing in
1329 * this family since it has an "ARP" like
1336 hash_start
= (char*)eth_data
->h_dest
;
1337 hash_size
= ETH_ALEN
;
1341 if (bond_info
->rlb_enabled
) {
1342 tx_slave
= rlb_arp_xmit(skb
, bond
);
1350 if (do_tx_balance
) {
1351 hash_index
= _simple_hash(hash_start
, hash_size
);
1352 tx_slave
= tlb_choose_channel(bond
, hash_index
, skb
->len
);
1356 /* unbalanced or unassigned, send through primary */
1357 tx_slave
= bond
->curr_active_slave
;
1358 bond_info
->unbalanced_load
+= skb
->len
;
1361 if (tx_slave
&& SLAVE_IS_OK(tx_slave
)) {
1362 if (tx_slave
!= bond
->curr_active_slave
) {
1363 memcpy(eth_data
->h_source
,
1364 tx_slave
->dev
->dev_addr
,
1368 res
= bond_dev_queue_xmit(bond
, skb
, tx_slave
->dev
);
1371 tlb_clear_slave(bond
, tx_slave
, 0);
1377 /* no suitable interface, frame not sent */
1380 read_unlock(&bond
->curr_slave_lock
);
1381 read_unlock(&bond
->lock
);
1385 void bond_alb_monitor(struct bonding
*bond
)
1387 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1388 struct slave
*slave
;
1391 read_lock(&bond
->lock
);
1393 if (bond
->kill_timers
) {
1397 if (bond
->slave_cnt
== 0) {
1398 bond_info
->tx_rebalance_counter
= 0;
1399 bond_info
->lp_counter
= 0;
1403 bond_info
->tx_rebalance_counter
++;
1404 bond_info
->lp_counter
++;
1406 /* send learning packets */
1407 if (bond_info
->lp_counter
>= BOND_ALB_LP_TICKS
) {
1408 /* change of curr_active_slave involves swapping of mac addresses.
1409 * in order to avoid this swapping from happening while
1410 * sending the learning packets, the curr_slave_lock must be held for
1413 read_lock(&bond
->curr_slave_lock
);
1415 bond_for_each_slave(bond
, slave
, i
) {
1416 alb_send_learning_packets(slave
,slave
->dev
->dev_addr
);
1419 read_unlock(&bond
->curr_slave_lock
);
1421 bond_info
->lp_counter
= 0;
1424 /* rebalance tx traffic */
1425 if (bond_info
->tx_rebalance_counter
>= BOND_TLB_REBALANCE_TICKS
) {
1427 read_lock(&bond
->curr_slave_lock
);
1429 bond_for_each_slave(bond
, slave
, i
) {
1430 tlb_clear_slave(bond
, slave
, 1);
1431 if (slave
== bond
->curr_active_slave
) {
1432 SLAVE_TLB_INFO(slave
).load
=
1433 bond_info
->unbalanced_load
/
1434 BOND_TLB_REBALANCE_INTERVAL
;
1435 bond_info
->unbalanced_load
= 0;
1439 read_unlock(&bond
->curr_slave_lock
);
1441 bond_info
->tx_rebalance_counter
= 0;
1444 /* handle rlb stuff */
1445 if (bond_info
->rlb_enabled
) {
1446 /* the following code changes the promiscuity of the
1447 * the curr_active_slave. It needs to be locked with a
1448 * write lock to protect from other code that also
1449 * sets the promiscuity.
1451 write_lock(&bond
->curr_slave_lock
);
1453 if (bond_info
->primary_is_promisc
&&
1454 (++bond_info
->rlb_promisc_timeout_counter
>= RLB_PROMISC_TIMEOUT
)) {
1456 bond_info
->rlb_promisc_timeout_counter
= 0;
1458 /* If the primary was set to promiscuous mode
1459 * because a slave was disabled then
1460 * it can now leave promiscuous mode.
1462 dev_set_promiscuity(bond
->curr_active_slave
->dev
, -1);
1463 bond_info
->primary_is_promisc
= 0;
1466 write_unlock(&bond
->curr_slave_lock
);
1468 if (bond_info
->rlb_rebalance
) {
1469 bond_info
->rlb_rebalance
= 0;
1470 rlb_rebalance(bond
);
1473 /* check if clients need updating */
1474 if (bond_info
->rx_ntt
) {
1475 if (bond_info
->rlb_update_delay_counter
) {
1476 --bond_info
->rlb_update_delay_counter
;
1478 rlb_update_rx_clients(bond
);
1479 if (bond_info
->rlb_update_retry_counter
) {
1480 --bond_info
->rlb_update_retry_counter
;
1482 bond_info
->rx_ntt
= 0;
1489 mod_timer(&(bond_info
->alb_timer
), jiffies
+ alb_delta_in_ticks
);
1491 read_unlock(&bond
->lock
);
1494 /* assumption: called before the slave is attached to the bond
1495 * and not locked by the bond lock
1497 int bond_alb_init_slave(struct bonding
*bond
, struct slave
*slave
)
1501 res
= alb_set_slave_mac_addr(slave
, slave
->perm_hwaddr
,
1502 bond
->alb_info
.rlb_enabled
);
1507 /* caller must hold the bond lock for write since the mac addresses
1508 * are compared and may be swapped.
1510 write_lock_bh(&bond
->lock
);
1512 res
= alb_handle_addr_collision_on_attach(bond
, slave
);
1514 write_unlock_bh(&bond
->lock
);
1520 tlb_init_slave(slave
);
1522 /* order a rebalance ASAP */
1523 bond
->alb_info
.tx_rebalance_counter
= BOND_TLB_REBALANCE_TICKS
;
1525 if (bond
->alb_info
.rlb_enabled
) {
1526 bond
->alb_info
.rlb_rebalance
= 1;
1532 /* Caller must hold bond lock for write */
1533 void bond_alb_deinit_slave(struct bonding
*bond
, struct slave
*slave
)
1535 if (bond
->slave_cnt
> 1) {
1536 alb_change_hw_addr_on_detach(bond
, slave
);
1539 tlb_clear_slave(bond
, slave
, 0);
1541 if (bond
->alb_info
.rlb_enabled
) {
1542 bond
->alb_info
.next_rx_slave
= NULL
;
1543 rlb_clear_slave(bond
, slave
);
1547 /* Caller must hold bond lock for read */
1548 void bond_alb_handle_link_change(struct bonding
*bond
, struct slave
*slave
, char link
)
1550 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
1552 if (link
== BOND_LINK_DOWN
) {
1553 tlb_clear_slave(bond
, slave
, 0);
1554 if (bond
->alb_info
.rlb_enabled
) {
1555 rlb_clear_slave(bond
, slave
);
1557 } else if (link
== BOND_LINK_UP
) {
1558 /* order a rebalance ASAP */
1559 bond_info
->tx_rebalance_counter
= BOND_TLB_REBALANCE_TICKS
;
1560 if (bond
->alb_info
.rlb_enabled
) {
1561 bond
->alb_info
.rlb_rebalance
= 1;
1562 /* If the updelay module parameter is smaller than the
1563 * forwarding delay of the switch the rebalance will
1564 * not work because the rebalance arp replies will
1565 * not be forwarded to the clients..
1572 * bond_alb_handle_active_change - assign new curr_active_slave
1573 * @bond: our bonding struct
1574 * @new_slave: new slave to assign
1576 * Set the bond->curr_active_slave to @new_slave and handle
1577 * mac address swapping and promiscuity changes as needed.
1579 * Caller must hold bond curr_slave_lock for write (or bond lock for write)
1581 void bond_alb_handle_active_change(struct bonding
*bond
, struct slave
*new_slave
)
1583 struct slave
*swap_slave
;
1586 if (bond
->curr_active_slave
== new_slave
) {
1590 if (bond
->curr_active_slave
&& bond
->alb_info
.primary_is_promisc
) {
1591 dev_set_promiscuity(bond
->curr_active_slave
->dev
, -1);
1592 bond
->alb_info
.primary_is_promisc
= 0;
1593 bond
->alb_info
.rlb_promisc_timeout_counter
= 0;
1596 swap_slave
= bond
->curr_active_slave
;
1597 bond
->curr_active_slave
= new_slave
;
1599 if (!new_slave
|| (bond
->slave_cnt
== 0)) {
1603 /* set the new curr_active_slave to the bonds mac address
1604 * i.e. swap mac addresses of old curr_active_slave and new curr_active_slave
1607 struct slave
*tmp_slave
;
1608 /* find slave that is holding the bond's mac address */
1609 bond_for_each_slave(bond
, tmp_slave
, i
) {
1610 if (!memcmp(tmp_slave
->dev
->dev_addr
,
1611 bond
->dev
->dev_addr
, ETH_ALEN
)) {
1612 swap_slave
= tmp_slave
;
1618 /* curr_active_slave must be set before calling alb_swap_mac_addr */
1620 /* swap mac address */
1621 alb_swap_mac_addr(bond
, swap_slave
, new_slave
);
1623 /* set the new_slave to the bond mac address */
1624 alb_set_slave_mac_addr(new_slave
, bond
->dev
->dev_addr
,
1625 bond
->alb_info
.rlb_enabled
);
1626 /* fasten bond mac on new current slave */
1627 alb_send_learning_packets(new_slave
, bond
->dev
->dev_addr
);
1631 int bond_alb_set_mac_address(struct net_device
*bond_dev
, void *addr
)
1633 struct bonding
*bond
= bond_dev
->priv
;
1634 struct sockaddr
*sa
= addr
;
1635 struct slave
*slave
, *swap_slave
;
1639 if (!is_valid_ether_addr(sa
->sa_data
)) {
1640 return -EADDRNOTAVAIL
;
1643 res
= alb_set_mac_address(bond
, addr
);
1648 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
1650 /* If there is no curr_active_slave there is nothing else to do.
1651 * Otherwise we'll need to pass the new address to it and handle
1654 if (!bond
->curr_active_slave
) {
1660 bond_for_each_slave(bond
, slave
, i
) {
1661 if (!memcmp(slave
->dev
->dev_addr
, bond_dev
->dev_addr
, ETH_ALEN
)) {
1668 alb_swap_mac_addr(bond
, swap_slave
, bond
->curr_active_slave
);
1670 alb_set_slave_mac_addr(bond
->curr_active_slave
, bond_dev
->dev_addr
,
1671 bond
->alb_info
.rlb_enabled
);
1673 alb_send_learning_packets(bond
->curr_active_slave
, bond_dev
->dev_addr
);
1674 if (bond
->alb_info
.rlb_enabled
) {
1675 /* inform clients mac address has changed */
1676 rlb_req_update_slave_clients(bond
, bond
->curr_active_slave
);
1683 void bond_alb_clear_vlan(struct bonding
*bond
, unsigned short vlan_id
)
1685 if (bond
->alb_info
.current_alb_vlan
&&
1686 (bond
->alb_info
.current_alb_vlan
->vlan_id
== vlan_id
)) {
1687 bond
->alb_info
.current_alb_vlan
= NULL
;
1690 if (bond
->alb_info
.rlb_enabled
) {
1691 rlb_clear_vlan(bond
, vlan_id
);