1
2
3
4
5
6#include <linux/skbuff.h>
7#include <linux/netdevice.h>
8#include <linux/etherdevice.h>
9#include <linux/pkt_sched.h>
10#include <linux/spinlock.h>
11#include <linux/slab.h>
12#include <linux/timer.h>
13#include <linux/ip.h>
14#include <linux/ipv6.h>
15#include <linux/if_arp.h>
16#include <linux/if_ether.h>
17#include <linux/if_bonding.h>
18#include <linux/if_vlan.h>
19#include <linux/in.h>
20#include <net/ipx.h>
21#include <net/arp.h>
22#include <net/ipv6.h>
23#include <asm/byteorder.h>
24#include <net/bonding.h>
25#include <net/bond_alb.h>
26
27static const u8 mac_v6_allmcast[ETH_ALEN + 2] __long_aligned = {
28 0x33, 0x33, 0x00, 0x00, 0x00, 0x01
29};
30static const int alb_delta_in_ticks = HZ / ALB_TIMER_TICKS_PER_SEC;
31
32#pragma pack(1)
33struct learning_pkt {
34 u8 mac_dst[ETH_ALEN];
35 u8 mac_src[ETH_ALEN];
36 __be16 type;
37 u8 padding[ETH_ZLEN - ETH_HLEN];
38};
39
40struct arp_pkt {
41 __be16 hw_addr_space;
42 __be16 prot_addr_space;
43 u8 hw_addr_len;
44 u8 prot_addr_len;
45 __be16 op_code;
46 u8 mac_src[ETH_ALEN];
47 __be32 ip_src;
48 u8 mac_dst[ETH_ALEN];
49 __be32 ip_dst;
50};
51#pragma pack()
52
53static inline struct arp_pkt *arp_pkt(const struct sk_buff *skb)
54{
55 return (struct arp_pkt *)skb_network_header(skb);
56}
57
58
59static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[],
60 bool strict_match);
61static void rlb_purge_src_ip(struct bonding *bond, struct arp_pkt *arp);
62static void rlb_src_unlink(struct bonding *bond, u32 index);
63static void rlb_src_link(struct bonding *bond, u32 ip_src_hash,
64 u32 ip_dst_hash);
65
66static inline u8 _simple_hash(const u8 *hash_start, int hash_size)
67{
68 int i;
69 u8 hash = 0;
70
71 for (i = 0; i < hash_size; i++)
72 hash ^= hash_start[i];
73
74 return hash;
75}
76
77
78
79static inline void tlb_init_table_entry(struct tlb_client_info *entry, int save_load)
80{
81 if (save_load) {
82 entry->load_history = 1 + entry->tx_bytes /
83 BOND_TLB_REBALANCE_INTERVAL;
84 entry->tx_bytes = 0;
85 }
86
87 entry->tx_slave = NULL;
88 entry->next = TLB_NULL_INDEX;
89 entry->prev = TLB_NULL_INDEX;
90}
91
92static inline void tlb_init_slave(struct slave *slave)
93{
94 SLAVE_TLB_INFO(slave).load = 0;
95 SLAVE_TLB_INFO(slave).head = TLB_NULL_INDEX;
96}
97
98static void __tlb_clear_slave(struct bonding *bond, struct slave *slave,
99 int save_load)
100{
101 struct tlb_client_info *tx_hash_table;
102 u32 index;
103
104
105 tx_hash_table = BOND_ALB_INFO(bond).tx_hashtbl;
106
107
108 if (tx_hash_table) {
109 index = SLAVE_TLB_INFO(slave).head;
110 while (index != TLB_NULL_INDEX) {
111 u32 next_index = tx_hash_table[index].next;
112 tlb_init_table_entry(&tx_hash_table[index], save_load);
113 index = next_index;
114 }
115 }
116
117 tlb_init_slave(slave);
118}
119
120static void tlb_clear_slave(struct bonding *bond, struct slave *slave,
121 int save_load)
122{
123 spin_lock_bh(&bond->mode_lock);
124 __tlb_clear_slave(bond, slave, save_load);
125 spin_unlock_bh(&bond->mode_lock);
126}
127
128
129static int tlb_initialize(struct bonding *bond)
130{
131 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
132 int size = TLB_HASH_TABLE_SIZE * sizeof(struct tlb_client_info);
133 struct tlb_client_info *new_hashtbl;
134 int i;
135
136 new_hashtbl = kzalloc(size, GFP_KERNEL);
137 if (!new_hashtbl)
138 return -ENOMEM;
139
140 spin_lock_bh(&bond->mode_lock);
141
142 bond_info->tx_hashtbl = new_hashtbl;
143
144 for (i = 0; i < TLB_HASH_TABLE_SIZE; i++)
145 tlb_init_table_entry(&bond_info->tx_hashtbl[i], 0);
146
147 spin_unlock_bh(&bond->mode_lock);
148
149 return 0;
150}
151
152
153static void tlb_deinitialize(struct bonding *bond)
154{
155 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
156
157 spin_lock_bh(&bond->mode_lock);
158
159 kfree(bond_info->tx_hashtbl);
160 bond_info->tx_hashtbl = NULL;
161
162 spin_unlock_bh(&bond->mode_lock);
163}
164
165static long long compute_gap(struct slave *slave)
166{
167 return (s64) (slave->speed << 20) -
168 (s64) (SLAVE_TLB_INFO(slave).load << 3);
169}
170
171static struct slave *tlb_get_least_loaded_slave(struct bonding *bond)
172{
173 struct slave *slave, *least_loaded;
174 struct list_head *iter;
175 long long max_gap;
176
177 least_loaded = NULL;
178 max_gap = LLONG_MIN;
179
180
181 bond_for_each_slave_rcu(bond, slave, iter) {
182 if (bond_slave_can_tx(slave)) {
183 long long gap = compute_gap(slave);
184
185 if (max_gap < gap) {
186 least_loaded = slave;
187 max_gap = gap;
188 }
189 }
190 }
191
192 return least_loaded;
193}
194
195static struct slave *__tlb_choose_channel(struct bonding *bond, u32 hash_index,
196 u32 skb_len)
197{
198 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
199 struct tlb_client_info *hash_table;
200 struct slave *assigned_slave;
201
202 hash_table = bond_info->tx_hashtbl;
203 assigned_slave = hash_table[hash_index].tx_slave;
204 if (!assigned_slave) {
205 assigned_slave = tlb_get_least_loaded_slave(bond);
206
207 if (assigned_slave) {
208 struct tlb_slave_info *slave_info =
209 &(SLAVE_TLB_INFO(assigned_slave));
210 u32 next_index = slave_info->head;
211
212 hash_table[hash_index].tx_slave = assigned_slave;
213 hash_table[hash_index].next = next_index;
214 hash_table[hash_index].prev = TLB_NULL_INDEX;
215
216 if (next_index != TLB_NULL_INDEX)
217 hash_table[next_index].prev = hash_index;
218
219 slave_info->head = hash_index;
220 slave_info->load +=
221 hash_table[hash_index].load_history;
222 }
223 }
224
225 if (assigned_slave)
226 hash_table[hash_index].tx_bytes += skb_len;
227
228 return assigned_slave;
229}
230
231static struct slave *tlb_choose_channel(struct bonding *bond, u32 hash_index,
232 u32 skb_len)
233{
234 struct slave *tx_slave;
235
236
237
238
239
240 spin_lock(&bond->mode_lock);
241 tx_slave = __tlb_choose_channel(bond, hash_index, skb_len);
242 spin_unlock(&bond->mode_lock);
243
244 return tx_slave;
245}
246
247
248
249
250
251
252static void rlb_update_entry_from_arp(struct bonding *bond, struct arp_pkt *arp)
253{
254 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
255 struct rlb_client_info *client_info;
256 u32 hash_index;
257
258 spin_lock_bh(&bond->mode_lock);
259
260 hash_index = _simple_hash((u8 *)&(arp->ip_src), sizeof(arp->ip_src));
261 client_info = &(bond_info->rx_hashtbl[hash_index]);
262
263 if ((client_info->assigned) &&
264 (client_info->ip_src == arp->ip_dst) &&
265 (client_info->ip_dst == arp->ip_src) &&
266 (!ether_addr_equal_64bits(client_info->mac_dst, arp->mac_src))) {
267
268 ether_addr_copy(client_info->mac_dst, arp->mac_src);
269 client_info->ntt = 1;
270 bond_info->rx_ntt = 1;
271 }
272
273 spin_unlock_bh(&bond->mode_lock);
274}
275
276static int rlb_arp_recv(const struct sk_buff *skb, struct bonding *bond,
277 struct slave *slave)
278{
279 struct arp_pkt *arp, _arp;
280
281 if (skb->protocol != cpu_to_be16(ETH_P_ARP))
282 goto out;
283
284 arp = skb_header_pointer(skb, 0, sizeof(_arp), &_arp);
285 if (!arp)
286 goto out;
287
288
289
290
291
292
293
294
295
296
297
298 rlb_purge_src_ip(bond, arp);
299
300 if (arp->op_code == htons(ARPOP_REPLY)) {
301
302 rlb_update_entry_from_arp(bond, arp);
303 slave_dbg(bond->dev, slave->dev, "Server received an ARP Reply from client\n");
304 }
305out:
306 return RX_HANDLER_ANOTHER;
307}
308
309
310static struct slave *__rlb_next_rx_slave(struct bonding *bond)
311{
312 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
313 struct slave *before = NULL, *rx_slave = NULL, *slave;
314 struct list_head *iter;
315 bool found = false;
316
317 bond_for_each_slave_rcu(bond, slave, iter) {
318 if (!bond_slave_can_tx(slave))
319 continue;
320 if (!found) {
321 if (!before || before->speed < slave->speed)
322 before = slave;
323 } else {
324 if (!rx_slave || rx_slave->speed < slave->speed)
325 rx_slave = slave;
326 }
327 if (slave == bond_info->rx_slave)
328 found = true;
329 }
330
331
332
333 if (!rx_slave || (before && rx_slave->speed < before->speed))
334 rx_slave = before;
335
336 if (rx_slave)
337 bond_info->rx_slave = rx_slave;
338
339 return rx_slave;
340}
341
342
343static struct slave *rlb_next_rx_slave(struct bonding *bond)
344{
345 struct slave *rx_slave;
346
347 ASSERT_RTNL();
348
349 rcu_read_lock();
350 rx_slave = __rlb_next_rx_slave(bond);
351 rcu_read_unlock();
352
353 return rx_slave;
354}
355
356
357
358
359
360
361static void rlb_teach_disabled_mac_on_primary(struct bonding *bond, u8 addr[])
362{
363 struct slave *curr_active = rtnl_dereference(bond->curr_active_slave);
364
365 if (!curr_active)
366 return;
367
368 if (!bond->alb_info.primary_is_promisc) {
369 if (!dev_set_promiscuity(curr_active->dev, 1))
370 bond->alb_info.primary_is_promisc = 1;
371 else
372 bond->alb_info.primary_is_promisc = 0;
373 }
374
375 bond->alb_info.rlb_promisc_timeout_counter = 0;
376
377 alb_send_learning_packets(curr_active, addr, true);
378}
379
380
381
382
383
384static void rlb_clear_slave(struct bonding *bond, struct slave *slave)
385{
386 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
387 struct rlb_client_info *rx_hash_table;
388 u32 index, next_index;
389
390
391 spin_lock_bh(&bond->mode_lock);
392
393 rx_hash_table = bond_info->rx_hashtbl;
394 index = bond_info->rx_hashtbl_used_head;
395 for (; index != RLB_NULL_INDEX; index = next_index) {
396 next_index = rx_hash_table[index].used_next;
397 if (rx_hash_table[index].slave == slave) {
398 struct slave *assigned_slave = rlb_next_rx_slave(bond);
399
400 if (assigned_slave) {
401 rx_hash_table[index].slave = assigned_slave;
402 if (is_valid_ether_addr(rx_hash_table[index].mac_dst)) {
403 bond_info->rx_hashtbl[index].ntt = 1;
404 bond_info->rx_ntt = 1;
405
406
407
408
409
410
411
412 bond_info->rlb_update_retry_counter =
413 RLB_UPDATE_RETRY;
414 }
415 } else {
416 rx_hash_table[index].slave = NULL;
417 }
418 }
419 }
420
421 spin_unlock_bh(&bond->mode_lock);
422
423 if (slave != rtnl_dereference(bond->curr_active_slave))
424 rlb_teach_disabled_mac_on_primary(bond, slave->dev->dev_addr);
425}
426
427static void rlb_update_client(struct rlb_client_info *client_info)
428{
429 int i;
430
431 if (!client_info->slave || !is_valid_ether_addr(client_info->mac_dst))
432 return;
433
434 for (i = 0; i < RLB_ARP_BURST_SIZE; i++) {
435 struct sk_buff *skb;
436
437 skb = arp_create(ARPOP_REPLY, ETH_P_ARP,
438 client_info->ip_dst,
439 client_info->slave->dev,
440 client_info->ip_src,
441 client_info->mac_dst,
442 client_info->slave->dev->dev_addr,
443 client_info->mac_dst);
444 if (!skb) {
445 slave_err(client_info->slave->bond->dev,
446 client_info->slave->dev,
447 "failed to create an ARP packet\n");
448 continue;
449 }
450
451 skb->dev = client_info->slave->dev;
452
453 if (client_info->vlan_id) {
454 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
455 client_info->vlan_id);
456 }
457
458 arp_xmit(skb);
459 }
460}
461
462
463static void rlb_update_rx_clients(struct bonding *bond)
464{
465 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
466 struct rlb_client_info *client_info;
467 u32 hash_index;
468
469 spin_lock_bh(&bond->mode_lock);
470
471 hash_index = bond_info->rx_hashtbl_used_head;
472 for (; hash_index != RLB_NULL_INDEX;
473 hash_index = client_info->used_next) {
474 client_info = &(bond_info->rx_hashtbl[hash_index]);
475 if (client_info->ntt) {
476 rlb_update_client(client_info);
477 if (bond_info->rlb_update_retry_counter == 0)
478 client_info->ntt = 0;
479 }
480 }
481
482
483
484
485 bond_info->rlb_update_delay_counter = RLB_UPDATE_DELAY;
486
487 spin_unlock_bh(&bond->mode_lock);
488}
489
490
491static void rlb_req_update_slave_clients(struct bonding *bond, struct slave *slave)
492{
493 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
494 struct rlb_client_info *client_info;
495 int ntt = 0;
496 u32 hash_index;
497
498 spin_lock_bh(&bond->mode_lock);
499
500 hash_index = bond_info->rx_hashtbl_used_head;
501 for (; hash_index != RLB_NULL_INDEX;
502 hash_index = client_info->used_next) {
503 client_info = &(bond_info->rx_hashtbl[hash_index]);
504
505 if ((client_info->slave == slave) &&
506 is_valid_ether_addr(client_info->mac_dst)) {
507 client_info->ntt = 1;
508 ntt = 1;
509 }
510 }
511
512
513 if (ntt) {
514 bond_info->rx_ntt = 1;
515
516 bond_info->rlb_update_retry_counter = RLB_UPDATE_RETRY;
517 }
518
519 spin_unlock_bh(&bond->mode_lock);
520}
521
522
523static void rlb_req_update_subnet_clients(struct bonding *bond, __be32 src_ip)
524{
525 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
526 struct rlb_client_info *client_info;
527 u32 hash_index;
528
529 spin_lock(&bond->mode_lock);
530
531 hash_index = bond_info->rx_hashtbl_used_head;
532 for (; hash_index != RLB_NULL_INDEX;
533 hash_index = client_info->used_next) {
534 client_info = &(bond_info->rx_hashtbl[hash_index]);
535
536 if (!client_info->slave) {
537 netdev_err(bond->dev, "found a client with no channel in the client's hash table\n");
538 continue;
539 }
540
541
542
543
544 if ((client_info->ip_src == src_ip) &&
545 !ether_addr_equal_64bits(client_info->slave->dev->dev_addr,
546 bond->dev->dev_addr) &&
547 is_valid_ether_addr(client_info->mac_dst)) {
548 client_info->ntt = 1;
549 bond_info->rx_ntt = 1;
550 }
551 }
552
553 spin_unlock(&bond->mode_lock);
554}
555
556static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bond)
557{
558 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
559 struct arp_pkt *arp = arp_pkt(skb);
560 struct slave *assigned_slave, *curr_active_slave;
561 struct rlb_client_info *client_info;
562 u32 hash_index = 0;
563
564 spin_lock(&bond->mode_lock);
565
566 curr_active_slave = rcu_dereference(bond->curr_active_slave);
567
568 hash_index = _simple_hash((u8 *)&arp->ip_dst, sizeof(arp->ip_dst));
569 client_info = &(bond_info->rx_hashtbl[hash_index]);
570
571 if (client_info->assigned) {
572 if ((client_info->ip_src == arp->ip_src) &&
573 (client_info->ip_dst == arp->ip_dst)) {
574
575 if (!is_broadcast_ether_addr(arp->mac_dst)) {
576
577 ether_addr_copy(client_info->mac_dst, arp->mac_dst);
578 }
579 ether_addr_copy(client_info->mac_src, arp->mac_src);
580
581 assigned_slave = client_info->slave;
582 if (assigned_slave) {
583 spin_unlock(&bond->mode_lock);
584 return assigned_slave;
585 }
586 } else {
587
588
589
590
591 if (curr_active_slave &&
592 client_info->slave != curr_active_slave) {
593 client_info->slave = curr_active_slave;
594 rlb_update_client(client_info);
595 }
596 }
597 }
598
599 assigned_slave = __rlb_next_rx_slave(bond);
600
601 if (assigned_slave) {
602 if (!(client_info->assigned &&
603 client_info->ip_src == arp->ip_src)) {
604
605
606
607 u32 hash_src = _simple_hash((u8 *)&arp->ip_src,
608 sizeof(arp->ip_src));
609 rlb_src_unlink(bond, hash_index);
610 rlb_src_link(bond, hash_src, hash_index);
611 }
612
613 client_info->ip_src = arp->ip_src;
614 client_info->ip_dst = arp->ip_dst;
615
616
617
618
619 ether_addr_copy(client_info->mac_dst, arp->mac_dst);
620 ether_addr_copy(client_info->mac_src, arp->mac_src);
621 client_info->slave = assigned_slave;
622
623 if (is_valid_ether_addr(client_info->mac_dst)) {
624 client_info->ntt = 1;
625 bond->alb_info.rx_ntt = 1;
626 } else {
627 client_info->ntt = 0;
628 }
629
630 if (vlan_get_tag(skb, &client_info->vlan_id))
631 client_info->vlan_id = 0;
632
633 if (!client_info->assigned) {
634 u32 prev_tbl_head = bond_info->rx_hashtbl_used_head;
635 bond_info->rx_hashtbl_used_head = hash_index;
636 client_info->used_next = prev_tbl_head;
637 if (prev_tbl_head != RLB_NULL_INDEX) {
638 bond_info->rx_hashtbl[prev_tbl_head].used_prev =
639 hash_index;
640 }
641 client_info->assigned = 1;
642 }
643 }
644
645 spin_unlock(&bond->mode_lock);
646
647 return assigned_slave;
648}
649
650
651
652
653
654static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond)
655{
656 struct arp_pkt *arp = arp_pkt(skb);
657 struct slave *tx_slave = NULL;
658
659
660
661
662 if (!bond_slave_has_mac_rx(bond, arp->mac_src))
663 return NULL;
664
665 if (arp->op_code == htons(ARPOP_REPLY)) {
666
667 tx_slave = rlb_choose_channel(skb, bond);
668 if (tx_slave)
669 bond_hw_addr_copy(arp->mac_src, tx_slave->dev->dev_addr,
670 tx_slave->dev->addr_len);
671 netdev_dbg(bond->dev, "(slave %s): Server sent ARP Reply packet\n",
672 tx_slave ? tx_slave->dev->name : "NULL");
673 } else if (arp->op_code == htons(ARPOP_REQUEST)) {
674
675
676
677
678
679 tx_slave = rlb_choose_channel(skb, bond);
680
681
682
683
684 bond->alb_info.rlb_update_delay_counter = RLB_UPDATE_DELAY;
685
686
687
688
689
690
691 rlb_req_update_subnet_clients(bond, arp->ip_src);
692 netdev_dbg(bond->dev, "(slave %s): Server sent ARP Request packet\n",
693 tx_slave ? tx_slave->dev->name : "NULL");
694 }
695
696 return tx_slave;
697}
698
699static void rlb_rebalance(struct bonding *bond)
700{
701 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
702 struct slave *assigned_slave;
703 struct rlb_client_info *client_info;
704 int ntt;
705 u32 hash_index;
706
707 spin_lock_bh(&bond->mode_lock);
708
709 ntt = 0;
710 hash_index = bond_info->rx_hashtbl_used_head;
711 for (; hash_index != RLB_NULL_INDEX;
712 hash_index = client_info->used_next) {
713 client_info = &(bond_info->rx_hashtbl[hash_index]);
714 assigned_slave = __rlb_next_rx_slave(bond);
715 if (assigned_slave && (client_info->slave != assigned_slave)) {
716 client_info->slave = assigned_slave;
717 if (!is_zero_ether_addr(client_info->mac_dst)) {
718 client_info->ntt = 1;
719 ntt = 1;
720 }
721 }
722 }
723
724
725 if (ntt)
726 bond_info->rx_ntt = 1;
727 spin_unlock_bh(&bond->mode_lock);
728}
729
730
731static void rlb_init_table_entry_dst(struct rlb_client_info *entry)
732{
733 entry->used_next = RLB_NULL_INDEX;
734 entry->used_prev = RLB_NULL_INDEX;
735 entry->assigned = 0;
736 entry->slave = NULL;
737 entry->vlan_id = 0;
738}
739static void rlb_init_table_entry_src(struct rlb_client_info *entry)
740{
741 entry->src_first = RLB_NULL_INDEX;
742 entry->src_prev = RLB_NULL_INDEX;
743 entry->src_next = RLB_NULL_INDEX;
744}
745
746static void rlb_init_table_entry(struct rlb_client_info *entry)
747{
748 memset(entry, 0, sizeof(struct rlb_client_info));
749 rlb_init_table_entry_dst(entry);
750 rlb_init_table_entry_src(entry);
751}
752
753static void rlb_delete_table_entry_dst(struct bonding *bond, u32 index)
754{
755 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
756 u32 next_index = bond_info->rx_hashtbl[index].used_next;
757 u32 prev_index = bond_info->rx_hashtbl[index].used_prev;
758
759 if (index == bond_info->rx_hashtbl_used_head)
760 bond_info->rx_hashtbl_used_head = next_index;
761 if (prev_index != RLB_NULL_INDEX)
762 bond_info->rx_hashtbl[prev_index].used_next = next_index;
763 if (next_index != RLB_NULL_INDEX)
764 bond_info->rx_hashtbl[next_index].used_prev = prev_index;
765}
766
767
768static void rlb_src_unlink(struct bonding *bond, u32 index)
769{
770 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
771 u32 next_index = bond_info->rx_hashtbl[index].src_next;
772 u32 prev_index = bond_info->rx_hashtbl[index].src_prev;
773
774 bond_info->rx_hashtbl[index].src_next = RLB_NULL_INDEX;
775 bond_info->rx_hashtbl[index].src_prev = RLB_NULL_INDEX;
776
777 if (next_index != RLB_NULL_INDEX)
778 bond_info->rx_hashtbl[next_index].src_prev = prev_index;
779
780 if (prev_index == RLB_NULL_INDEX)
781 return;
782
783
784 if (bond_info->rx_hashtbl[prev_index].src_first == index)
785 bond_info->rx_hashtbl[prev_index].src_first = next_index;
786 else
787 bond_info->rx_hashtbl[prev_index].src_next = next_index;
788
789}
790
791static void rlb_delete_table_entry(struct bonding *bond, u32 index)
792{
793 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
794 struct rlb_client_info *entry = &(bond_info->rx_hashtbl[index]);
795
796 rlb_delete_table_entry_dst(bond, index);
797 rlb_init_table_entry_dst(entry);
798
799 rlb_src_unlink(bond, index);
800}
801
802
803
804
805static void rlb_src_link(struct bonding *bond, u32 ip_src_hash, u32 ip_dst_hash)
806{
807 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
808 u32 next;
809
810 bond_info->rx_hashtbl[ip_dst_hash].src_prev = ip_src_hash;
811 next = bond_info->rx_hashtbl[ip_src_hash].src_first;
812 bond_info->rx_hashtbl[ip_dst_hash].src_next = next;
813 if (next != RLB_NULL_INDEX)
814 bond_info->rx_hashtbl[next].src_prev = ip_dst_hash;
815 bond_info->rx_hashtbl[ip_src_hash].src_first = ip_dst_hash;
816}
817
818
819
820
821static void rlb_purge_src_ip(struct bonding *bond, struct arp_pkt *arp)
822{
823 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
824 u32 ip_src_hash = _simple_hash((u8 *)&(arp->ip_src), sizeof(arp->ip_src));
825 u32 index;
826
827 spin_lock_bh(&bond->mode_lock);
828
829 index = bond_info->rx_hashtbl[ip_src_hash].src_first;
830 while (index != RLB_NULL_INDEX) {
831 struct rlb_client_info *entry = &(bond_info->rx_hashtbl[index]);
832 u32 next_index = entry->src_next;
833 if (entry->ip_src == arp->ip_src &&
834 !ether_addr_equal_64bits(arp->mac_src, entry->mac_src))
835 rlb_delete_table_entry(bond, index);
836 index = next_index;
837 }
838 spin_unlock_bh(&bond->mode_lock);
839}
840
841static int rlb_initialize(struct bonding *bond)
842{
843 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
844 struct rlb_client_info *new_hashtbl;
845 int size = RLB_HASH_TABLE_SIZE * sizeof(struct rlb_client_info);
846 int i;
847
848 new_hashtbl = kmalloc(size, GFP_KERNEL);
849 if (!new_hashtbl)
850 return -1;
851
852 spin_lock_bh(&bond->mode_lock);
853
854 bond_info->rx_hashtbl = new_hashtbl;
855
856 bond_info->rx_hashtbl_used_head = RLB_NULL_INDEX;
857
858 for (i = 0; i < RLB_HASH_TABLE_SIZE; i++)
859 rlb_init_table_entry(bond_info->rx_hashtbl + i);
860
861 spin_unlock_bh(&bond->mode_lock);
862
863
864 bond->recv_probe = rlb_arp_recv;
865
866 return 0;
867}
868
869static void rlb_deinitialize(struct bonding *bond)
870{
871 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
872
873 spin_lock_bh(&bond->mode_lock);
874
875 kfree(bond_info->rx_hashtbl);
876 bond_info->rx_hashtbl = NULL;
877 bond_info->rx_hashtbl_used_head = RLB_NULL_INDEX;
878
879 spin_unlock_bh(&bond->mode_lock);
880}
881
882static void rlb_clear_vlan(struct bonding *bond, unsigned short vlan_id)
883{
884 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
885 u32 curr_index;
886
887 spin_lock_bh(&bond->mode_lock);
888
889 curr_index = bond_info->rx_hashtbl_used_head;
890 while (curr_index != RLB_NULL_INDEX) {
891 struct rlb_client_info *curr = &(bond_info->rx_hashtbl[curr_index]);
892 u32 next_index = bond_info->rx_hashtbl[curr_index].used_next;
893
894 if (curr->vlan_id == vlan_id)
895 rlb_delete_table_entry(bond, curr_index);
896
897 curr_index = next_index;
898 }
899
900 spin_unlock_bh(&bond->mode_lock);
901}
902
903
904
905static void alb_send_lp_vid(struct slave *slave, u8 mac_addr[],
906 __be16 vlan_proto, u16 vid)
907{
908 struct learning_pkt pkt;
909 struct sk_buff *skb;
910 int size = sizeof(struct learning_pkt);
911
912 memset(&pkt, 0, size);
913 ether_addr_copy(pkt.mac_dst, mac_addr);
914 ether_addr_copy(pkt.mac_src, mac_addr);
915 pkt.type = cpu_to_be16(ETH_P_LOOPBACK);
916
917 skb = dev_alloc_skb(size);
918 if (!skb)
919 return;
920
921 skb_put_data(skb, &pkt, size);
922
923 skb_reset_mac_header(skb);
924 skb->network_header = skb->mac_header + ETH_HLEN;
925 skb->protocol = pkt.type;
926 skb->priority = TC_PRIO_CONTROL;
927 skb->dev = slave->dev;
928
929 slave_dbg(slave->bond->dev, slave->dev,
930 "Send learning packet: mac %pM vlan %d\n", mac_addr, vid);
931
932 if (vid)
933 __vlan_hwaccel_put_tag(skb, vlan_proto, vid);
934
935 dev_queue_xmit(skb);
936}
937
938struct alb_walk_data {
939 struct bonding *bond;
940 struct slave *slave;
941 u8 *mac_addr;
942 bool strict_match;
943};
944
945static int alb_upper_dev_walk(struct net_device *upper, void *_data)
946{
947 struct alb_walk_data *data = _data;
948 bool strict_match = data->strict_match;
949 struct bonding *bond = data->bond;
950 struct slave *slave = data->slave;
951 u8 *mac_addr = data->mac_addr;
952 struct bond_vlan_tag *tags;
953
954 if (is_vlan_dev(upper) &&
955 bond->dev->lower_level == upper->lower_level - 1) {
956 if (upper->addr_assign_type == NET_ADDR_STOLEN) {
957 alb_send_lp_vid(slave, mac_addr,
958 vlan_dev_vlan_proto(upper),
959 vlan_dev_vlan_id(upper));
960 } else {
961 alb_send_lp_vid(slave, upper->dev_addr,
962 vlan_dev_vlan_proto(upper),
963 vlan_dev_vlan_id(upper));
964 }
965 }
966
967
968
969
970 if (netif_is_macvlan(upper) && !strict_match) {
971 tags = bond_verify_device_path(bond->dev, upper, 0);
972 if (IS_ERR_OR_NULL(tags))
973 BUG();
974 alb_send_lp_vid(slave, upper->dev_addr,
975 tags[0].vlan_proto, tags[0].vlan_id);
976 kfree(tags);
977 }
978
979 return 0;
980}
981
982static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[],
983 bool strict_match)
984{
985 struct bonding *bond = bond_get_bond_by_slave(slave);
986 struct alb_walk_data data = {
987 .strict_match = strict_match,
988 .mac_addr = mac_addr,
989 .slave = slave,
990 .bond = bond,
991 };
992
993
994 alb_send_lp_vid(slave, mac_addr, 0, 0);
995
996
997
998
999 rcu_read_lock();
1000 netdev_walk_all_upper_dev_rcu(bond->dev, alb_upper_dev_walk, &data);
1001 rcu_read_unlock();
1002}
1003
1004static int alb_set_slave_mac_addr(struct slave *slave, u8 addr[],
1005 unsigned int len)
1006{
1007 struct net_device *dev = slave->dev;
1008 struct sockaddr_storage ss;
1009
1010 if (BOND_MODE(slave->bond) == BOND_MODE_TLB) {
1011 memcpy(dev->dev_addr, addr, len);
1012 return 0;
1013 }
1014
1015
1016
1017
1018 memcpy(ss.__data, addr, len);
1019 ss.ss_family = dev->type;
1020 if (dev_set_mac_address(dev, (struct sockaddr *)&ss, NULL)) {
1021 slave_err(slave->bond->dev, dev, "dev_set_mac_address on slave failed! ALB mode requires that the base driver support setting the hw address also when the network device's interface is open\n");
1022 return -EOPNOTSUPP;
1023 }
1024 return 0;
1025}
1026
1027
1028
1029
1030
1031static void alb_swap_mac_addr(struct slave *slave1, struct slave *slave2)
1032{
1033 u8 tmp_mac_addr[MAX_ADDR_LEN];
1034
1035 bond_hw_addr_copy(tmp_mac_addr, slave1->dev->dev_addr,
1036 slave1->dev->addr_len);
1037 alb_set_slave_mac_addr(slave1, slave2->dev->dev_addr,
1038 slave2->dev->addr_len);
1039 alb_set_slave_mac_addr(slave2, tmp_mac_addr,
1040 slave1->dev->addr_len);
1041
1042}
1043
1044
1045
1046
1047
1048static void alb_fasten_mac_swap(struct bonding *bond, struct slave *slave1,
1049 struct slave *slave2)
1050{
1051 int slaves_state_differ = (bond_slave_can_tx(slave1) != bond_slave_can_tx(slave2));
1052 struct slave *disabled_slave = NULL;
1053
1054 ASSERT_RTNL();
1055
1056
1057 if (bond_slave_can_tx(slave1)) {
1058 alb_send_learning_packets(slave1, slave1->dev->dev_addr, false);
1059 if (bond->alb_info.rlb_enabled) {
1060
1061
1062
1063 rlb_req_update_slave_clients(bond, slave1);
1064 }
1065 } else {
1066 disabled_slave = slave1;
1067 }
1068
1069 if (bond_slave_can_tx(slave2)) {
1070 alb_send_learning_packets(slave2, slave2->dev->dev_addr, false);
1071 if (bond->alb_info.rlb_enabled) {
1072
1073
1074
1075 rlb_req_update_slave_clients(bond, slave2);
1076 }
1077 } else {
1078 disabled_slave = slave2;
1079 }
1080
1081 if (bond->alb_info.rlb_enabled && slaves_state_differ) {
1082
1083 rlb_teach_disabled_mac_on_primary(bond,
1084 disabled_slave->dev->dev_addr);
1085 }
1086}
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102static void alb_change_hw_addr_on_detach(struct bonding *bond, struct slave *slave)
1103{
1104 int perm_curr_diff;
1105 int perm_bond_diff;
1106 struct slave *found_slave;
1107
1108 perm_curr_diff = !ether_addr_equal_64bits(slave->perm_hwaddr,
1109 slave->dev->dev_addr);
1110 perm_bond_diff = !ether_addr_equal_64bits(slave->perm_hwaddr,
1111 bond->dev->dev_addr);
1112
1113 if (perm_curr_diff && perm_bond_diff) {
1114 found_slave = bond_slave_has_mac(bond, slave->perm_hwaddr);
1115
1116 if (found_slave) {
1117 alb_swap_mac_addr(slave, found_slave);
1118 alb_fasten_mac_swap(bond, slave, found_slave);
1119 }
1120 }
1121}
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145static int alb_handle_addr_collision_on_attach(struct bonding *bond, struct slave *slave)
1146{
1147 struct slave *has_bond_addr = rcu_access_pointer(bond->curr_active_slave);
1148 struct slave *tmp_slave1, *free_mac_slave = NULL;
1149 struct list_head *iter;
1150
1151 if (!bond_has_slaves(bond)) {
1152
1153 return 0;
1154 }
1155
1156
1157
1158
1159
1160 if (!ether_addr_equal_64bits(slave->perm_hwaddr, bond->dev->dev_addr)) {
1161 if (!bond_slave_has_mac(bond, slave->dev->dev_addr))
1162 return 0;
1163
1164
1165
1166
1167 alb_set_slave_mac_addr(slave, bond->dev->dev_addr,
1168 bond->dev->addr_len);
1169 }
1170
1171
1172
1173
1174 bond_for_each_slave(bond, tmp_slave1, iter) {
1175 if (!bond_slave_has_mac(bond, tmp_slave1->perm_hwaddr)) {
1176
1177
1178
1179 free_mac_slave = tmp_slave1;
1180 break;
1181 }
1182
1183 if (!has_bond_addr) {
1184 if (ether_addr_equal_64bits(tmp_slave1->dev->dev_addr,
1185 bond->dev->dev_addr)) {
1186
1187 has_bond_addr = tmp_slave1;
1188 }
1189 }
1190 }
1191
1192 if (free_mac_slave) {
1193 alb_set_slave_mac_addr(slave, free_mac_slave->perm_hwaddr,
1194 free_mac_slave->dev->addr_len);
1195
1196 slave_warn(bond->dev, slave->dev, "the slave hw address is in use by the bond; giving it the hw address of %s\n",
1197 free_mac_slave->dev->name);
1198
1199 } else if (has_bond_addr) {
1200 slave_err(bond->dev, slave->dev, "the slave hw address 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");
1201 return -EFAULT;
1202 }
1203
1204 return 0;
1205}
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221static int alb_set_mac_address(struct bonding *bond, void *addr)
1222{
1223 struct slave *slave, *rollback_slave;
1224 struct list_head *iter;
1225 struct sockaddr_storage ss;
1226 char tmp_addr[MAX_ADDR_LEN];
1227 int res;
1228
1229 if (bond->alb_info.rlb_enabled)
1230 return 0;
1231
1232 bond_for_each_slave(bond, slave, iter) {
1233
1234 bond_hw_addr_copy(tmp_addr, slave->dev->dev_addr,
1235 slave->dev->addr_len);
1236
1237 res = dev_set_mac_address(slave->dev, addr, NULL);
1238
1239
1240 bond_hw_addr_copy(slave->dev->dev_addr, tmp_addr,
1241 slave->dev->addr_len);
1242
1243 if (res)
1244 goto unwind;
1245 }
1246
1247 return 0;
1248
1249unwind:
1250 memcpy(ss.__data, bond->dev->dev_addr, bond->dev->addr_len);
1251 ss.ss_family = bond->dev->type;
1252
1253
1254 bond_for_each_slave(bond, rollback_slave, iter) {
1255 if (rollback_slave == slave)
1256 break;
1257 bond_hw_addr_copy(tmp_addr, rollback_slave->dev->dev_addr,
1258 rollback_slave->dev->addr_len);
1259 dev_set_mac_address(rollback_slave->dev,
1260 (struct sockaddr *)&ss, NULL);
1261 bond_hw_addr_copy(rollback_slave->dev->dev_addr, tmp_addr,
1262 rollback_slave->dev->addr_len);
1263 }
1264
1265 return res;
1266}
1267
1268
1269
1270int bond_alb_initialize(struct bonding *bond, int rlb_enabled)
1271{
1272 int res;
1273
1274 res = tlb_initialize(bond);
1275 if (res)
1276 return res;
1277
1278 if (rlb_enabled) {
1279 bond->alb_info.rlb_enabled = 1;
1280 res = rlb_initialize(bond);
1281 if (res) {
1282 tlb_deinitialize(bond);
1283 return res;
1284 }
1285 } else {
1286 bond->alb_info.rlb_enabled = 0;
1287 }
1288
1289 return 0;
1290}
1291
1292void bond_alb_deinitialize(struct bonding *bond)
1293{
1294 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
1295
1296 tlb_deinitialize(bond);
1297
1298 if (bond_info->rlb_enabled)
1299 rlb_deinitialize(bond);
1300}
1301
1302static netdev_tx_t bond_do_alb_xmit(struct sk_buff *skb, struct bonding *bond,
1303 struct slave *tx_slave)
1304{
1305 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
1306 struct ethhdr *eth_data = eth_hdr(skb);
1307
1308 if (!tx_slave) {
1309
1310 tx_slave = rcu_dereference(bond->curr_active_slave);
1311 if (bond->params.tlb_dynamic_lb)
1312 bond_info->unbalanced_load += skb->len;
1313 }
1314
1315 if (tx_slave && bond_slave_can_tx(tx_slave)) {
1316 if (tx_slave != rcu_access_pointer(bond->curr_active_slave)) {
1317 ether_addr_copy(eth_data->h_source,
1318 tx_slave->dev->dev_addr);
1319 }
1320
1321 bond_dev_queue_xmit(bond, skb, tx_slave->dev);
1322 goto out;
1323 }
1324
1325 if (tx_slave && bond->params.tlb_dynamic_lb) {
1326 spin_lock(&bond->mode_lock);
1327 __tlb_clear_slave(bond, tx_slave, 0);
1328 spin_unlock(&bond->mode_lock);
1329 }
1330
1331
1332 bond_tx_drop(bond->dev, skb);
1333out:
1334 return NETDEV_TX_OK;
1335}
1336
1337netdev_tx_t bond_tlb_xmit(struct sk_buff *skb, struct net_device *bond_dev)
1338{
1339 struct bonding *bond = netdev_priv(bond_dev);
1340 struct ethhdr *eth_data;
1341 struct slave *tx_slave = NULL;
1342 u32 hash_index;
1343
1344 skb_reset_mac_header(skb);
1345 eth_data = eth_hdr(skb);
1346
1347
1348 if (!is_multicast_ether_addr(eth_data->h_dest)) {
1349 switch (skb->protocol) {
1350 case htons(ETH_P_IP):
1351 case htons(ETH_P_IPX):
1352
1353 case htons(ETH_P_IPV6):
1354 hash_index = bond_xmit_hash(bond, skb);
1355 if (bond->params.tlb_dynamic_lb) {
1356 tx_slave = tlb_choose_channel(bond,
1357 hash_index & 0xFF,
1358 skb->len);
1359 } else {
1360 struct bond_up_slave *slaves;
1361 unsigned int count;
1362
1363 slaves = rcu_dereference(bond->slave_arr);
1364 count = slaves ? READ_ONCE(slaves->count) : 0;
1365 if (likely(count))
1366 tx_slave = slaves->arr[hash_index %
1367 count];
1368 }
1369 break;
1370 }
1371 }
1372 return bond_do_alb_xmit(skb, bond, tx_slave);
1373}
1374
1375netdev_tx_t bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev)
1376{
1377 struct bonding *bond = netdev_priv(bond_dev);
1378 struct ethhdr *eth_data;
1379 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
1380 struct slave *tx_slave = NULL;
1381 static const __be32 ip_bcast = htonl(0xffffffff);
1382 int hash_size = 0;
1383 bool do_tx_balance = true;
1384 u32 hash_index = 0;
1385 const u8 *hash_start = NULL;
1386 struct ipv6hdr *ip6hdr;
1387
1388 skb_reset_mac_header(skb);
1389 eth_data = eth_hdr(skb);
1390
1391 switch (ntohs(skb->protocol)) {
1392 case ETH_P_IP: {
1393 const struct iphdr *iph = ip_hdr(skb);
1394
1395 if (is_broadcast_ether_addr(eth_data->h_dest) ||
1396 iph->daddr == ip_bcast ||
1397 iph->protocol == IPPROTO_IGMP) {
1398 do_tx_balance = false;
1399 break;
1400 }
1401 hash_start = (char *)&(iph->daddr);
1402 hash_size = sizeof(iph->daddr);
1403 }
1404 break;
1405 case ETH_P_IPV6:
1406
1407
1408
1409 if (is_broadcast_ether_addr(eth_data->h_dest)) {
1410 do_tx_balance = false;
1411 break;
1412 }
1413
1414
1415
1416
1417 if (ether_addr_equal_64bits(eth_data->h_dest, mac_v6_allmcast)) {
1418 do_tx_balance = false;
1419 break;
1420 }
1421
1422
1423
1424
1425
1426 ip6hdr = ipv6_hdr(skb);
1427 if (ipv6_addr_any(&ip6hdr->saddr)) {
1428 do_tx_balance = false;
1429 break;
1430 }
1431
1432 hash_start = (char *)&(ipv6_hdr(skb)->daddr);
1433 hash_size = sizeof(ipv6_hdr(skb)->daddr);
1434 break;
1435 case ETH_P_IPX:
1436 if (ipx_hdr(skb)->ipx_checksum != IPX_NO_CHECKSUM) {
1437
1438 do_tx_balance = false;
1439 break;
1440 }
1441
1442 if (ipx_hdr(skb)->ipx_type != IPX_TYPE_NCP) {
1443
1444
1445
1446
1447 do_tx_balance = false;
1448 break;
1449 }
1450
1451 hash_start = (char *)eth_data->h_dest;
1452 hash_size = ETH_ALEN;
1453 break;
1454 case ETH_P_ARP:
1455 do_tx_balance = false;
1456 if (bond_info->rlb_enabled)
1457 tx_slave = rlb_arp_xmit(skb, bond);
1458 break;
1459 default:
1460 do_tx_balance = false;
1461 break;
1462 }
1463
1464 if (do_tx_balance) {
1465 if (bond->params.tlb_dynamic_lb) {
1466 hash_index = _simple_hash(hash_start, hash_size);
1467 tx_slave = tlb_choose_channel(bond, hash_index, skb->len);
1468 } else {
1469
1470
1471
1472
1473
1474 struct bond_up_slave *slaves;
1475 unsigned int count;
1476
1477 slaves = rcu_dereference(bond->slave_arr);
1478 count = slaves ? READ_ONCE(slaves->count) : 0;
1479 if (likely(count))
1480 tx_slave = slaves->arr[bond_xmit_hash(bond, skb) %
1481 count];
1482 }
1483 }
1484
1485 return bond_do_alb_xmit(skb, bond, tx_slave);
1486}
1487
1488void bond_alb_monitor(struct work_struct *work)
1489{
1490 struct bonding *bond = container_of(work, struct bonding,
1491 alb_work.work);
1492 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
1493 struct list_head *iter;
1494 struct slave *slave;
1495
1496 if (!bond_has_slaves(bond)) {
1497 bond_info->tx_rebalance_counter = 0;
1498 bond_info->lp_counter = 0;
1499 goto re_arm;
1500 }
1501
1502 rcu_read_lock();
1503
1504 bond_info->tx_rebalance_counter++;
1505 bond_info->lp_counter++;
1506
1507
1508 if (bond_info->lp_counter >= BOND_ALB_LP_TICKS(bond)) {
1509 bool strict_match;
1510
1511 bond_for_each_slave_rcu(bond, slave, iter) {
1512
1513
1514
1515
1516
1517 strict_match = (slave != rcu_access_pointer(bond->curr_active_slave) ||
1518 bond_info->rlb_enabled);
1519 alb_send_learning_packets(slave, slave->dev->dev_addr,
1520 strict_match);
1521 }
1522 bond_info->lp_counter = 0;
1523 }
1524
1525
1526 if (bond_info->tx_rebalance_counter >= BOND_TLB_REBALANCE_TICKS) {
1527 bond_for_each_slave_rcu(bond, slave, iter) {
1528 tlb_clear_slave(bond, slave, 1);
1529 if (slave == rcu_access_pointer(bond->curr_active_slave)) {
1530 SLAVE_TLB_INFO(slave).load =
1531 bond_info->unbalanced_load /
1532 BOND_TLB_REBALANCE_INTERVAL;
1533 bond_info->unbalanced_load = 0;
1534 }
1535 }
1536 bond_info->tx_rebalance_counter = 0;
1537 }
1538
1539 if (bond_info->rlb_enabled) {
1540 if (bond_info->primary_is_promisc &&
1541 (++bond_info->rlb_promisc_timeout_counter >= RLB_PROMISC_TIMEOUT)) {
1542
1543
1544
1545
1546 rcu_read_unlock();
1547 if (!rtnl_trylock())
1548 goto re_arm;
1549
1550 bond_info->rlb_promisc_timeout_counter = 0;
1551
1552
1553
1554
1555
1556 dev_set_promiscuity(rtnl_dereference(bond->curr_active_slave)->dev,
1557 -1);
1558 bond_info->primary_is_promisc = 0;
1559
1560 rtnl_unlock();
1561 rcu_read_lock();
1562 }
1563
1564 if (bond_info->rlb_rebalance) {
1565 bond_info->rlb_rebalance = 0;
1566 rlb_rebalance(bond);
1567 }
1568
1569
1570 if (bond_info->rx_ntt) {
1571 if (bond_info->rlb_update_delay_counter) {
1572 --bond_info->rlb_update_delay_counter;
1573 } else {
1574 rlb_update_rx_clients(bond);
1575 if (bond_info->rlb_update_retry_counter)
1576 --bond_info->rlb_update_retry_counter;
1577 else
1578 bond_info->rx_ntt = 0;
1579 }
1580 }
1581 }
1582 rcu_read_unlock();
1583re_arm:
1584 queue_delayed_work(bond->wq, &bond->alb_work, alb_delta_in_ticks);
1585}
1586
1587
1588
1589
1590int bond_alb_init_slave(struct bonding *bond, struct slave *slave)
1591{
1592 int res;
1593
1594 res = alb_set_slave_mac_addr(slave, slave->perm_hwaddr,
1595 slave->dev->addr_len);
1596 if (res)
1597 return res;
1598
1599 res = alb_handle_addr_collision_on_attach(bond, slave);
1600 if (res)
1601 return res;
1602
1603 tlb_init_slave(slave);
1604
1605
1606 bond->alb_info.tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS;
1607
1608 if (bond->alb_info.rlb_enabled)
1609 bond->alb_info.rlb_rebalance = 1;
1610
1611 return 0;
1612}
1613
1614
1615
1616
1617
1618
1619void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave)
1620{
1621 if (bond_has_slaves(bond))
1622 alb_change_hw_addr_on_detach(bond, slave);
1623
1624 tlb_clear_slave(bond, slave, 0);
1625
1626 if (bond->alb_info.rlb_enabled) {
1627 bond->alb_info.rx_slave = NULL;
1628 rlb_clear_slave(bond, slave);
1629 }
1630
1631}
1632
1633void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link)
1634{
1635 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
1636
1637 if (link == BOND_LINK_DOWN) {
1638 tlb_clear_slave(bond, slave, 0);
1639 if (bond->alb_info.rlb_enabled)
1640 rlb_clear_slave(bond, slave);
1641 } else if (link == BOND_LINK_UP) {
1642
1643 bond_info->tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS;
1644 if (bond->alb_info.rlb_enabled) {
1645 bond->alb_info.rlb_rebalance = 1;
1646
1647
1648
1649
1650
1651 }
1652 }
1653
1654 if (bond_is_nondyn_tlb(bond)) {
1655 if (bond_update_slave_arr(bond, NULL))
1656 pr_err("Failed to build slave-array for TLB mode.\n");
1657 }
1658}
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave)
1671{
1672 struct slave *swap_slave;
1673 struct slave *curr_active;
1674
1675 curr_active = rtnl_dereference(bond->curr_active_slave);
1676 if (curr_active == new_slave)
1677 return;
1678
1679 if (curr_active && bond->alb_info.primary_is_promisc) {
1680 dev_set_promiscuity(curr_active->dev, -1);
1681 bond->alb_info.primary_is_promisc = 0;
1682 bond->alb_info.rlb_promisc_timeout_counter = 0;
1683 }
1684
1685 swap_slave = curr_active;
1686 rcu_assign_pointer(bond->curr_active_slave, new_slave);
1687
1688 if (!new_slave || !bond_has_slaves(bond))
1689 return;
1690
1691
1692
1693
1694 if (!swap_slave)
1695 swap_slave = bond_slave_has_mac(bond, bond->dev->dev_addr);
1696
1697
1698
1699
1700
1701 if (swap_slave)
1702 tlb_clear_slave(bond, swap_slave, 1);
1703 tlb_clear_slave(bond, new_slave, 1);
1704
1705
1706
1707
1708 if (BOND_MODE(bond) == BOND_MODE_TLB) {
1709 struct sockaddr_storage ss;
1710 u8 tmp_addr[MAX_ADDR_LEN];
1711
1712 bond_hw_addr_copy(tmp_addr, new_slave->dev->dev_addr,
1713 new_slave->dev->addr_len);
1714
1715 bond_hw_addr_copy(ss.__data, bond->dev->dev_addr,
1716 bond->dev->addr_len);
1717 ss.ss_family = bond->dev->type;
1718
1719 dev_set_mac_address(new_slave->dev, (struct sockaddr *)&ss,
1720 NULL);
1721
1722 bond_hw_addr_copy(new_slave->dev->dev_addr, tmp_addr,
1723 new_slave->dev->addr_len);
1724 }
1725
1726
1727 if (swap_slave) {
1728
1729 alb_swap_mac_addr(swap_slave, new_slave);
1730 alb_fasten_mac_swap(bond, swap_slave, new_slave);
1731 } else {
1732
1733 alb_set_slave_mac_addr(new_slave, bond->dev->dev_addr,
1734 bond->dev->addr_len);
1735 alb_send_learning_packets(new_slave, bond->dev->dev_addr,
1736 false);
1737 }
1738}
1739
1740
1741int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr)
1742{
1743 struct bonding *bond = netdev_priv(bond_dev);
1744 struct sockaddr_storage *ss = addr;
1745 struct slave *curr_active;
1746 struct slave *swap_slave;
1747 int res;
1748
1749 if (!is_valid_ether_addr(ss->__data))
1750 return -EADDRNOTAVAIL;
1751
1752 res = alb_set_mac_address(bond, addr);
1753 if (res)
1754 return res;
1755
1756 bond_hw_addr_copy(bond_dev->dev_addr, ss->__data, bond_dev->addr_len);
1757
1758
1759
1760
1761
1762 curr_active = rtnl_dereference(bond->curr_active_slave);
1763 if (!curr_active)
1764 return 0;
1765
1766 swap_slave = bond_slave_has_mac(bond, bond_dev->dev_addr);
1767
1768 if (swap_slave) {
1769 alb_swap_mac_addr(swap_slave, curr_active);
1770 alb_fasten_mac_swap(bond, swap_slave, curr_active);
1771 } else {
1772 alb_set_slave_mac_addr(curr_active, bond_dev->dev_addr,
1773 bond_dev->addr_len);
1774
1775 alb_send_learning_packets(curr_active,
1776 bond_dev->dev_addr, false);
1777 if (bond->alb_info.rlb_enabled) {
1778
1779 rlb_req_update_slave_clients(bond, curr_active);
1780 }
1781 }
1782
1783 return 0;
1784}
1785
1786void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id)
1787{
1788 if (bond->alb_info.rlb_enabled)
1789 rlb_clear_vlan(bond, vlan_id);
1790}
1791
1792