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22#include <linux/skbuff.h>
23#include <linux/netdevice.h>
24#include <linux/etherdevice.h>
25#include <linux/pkt_sched.h>
26#include <linux/spinlock.h>
27#include <linux/slab.h>
28#include <linux/timer.h>
29#include <linux/ip.h>
30#include <linux/ipv6.h>
31#include <linux/if_arp.h>
32#include <linux/if_ether.h>
33#include <linux/if_bonding.h>
34#include <linux/if_vlan.h>
35#include <linux/in.h>
36#include <net/ipx.h>
37#include <net/arp.h>
38#include <net/ipv6.h>
39#include <asm/byteorder.h>
40#include <net/bonding.h>
41#include <net/bond_alb.h>
42
43
44
45static const u8 mac_bcast[ETH_ALEN + 2] __long_aligned = {
46 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
47};
48static const u8 mac_v6_allmcast[ETH_ALEN + 2] __long_aligned = {
49 0x33, 0x33, 0x00, 0x00, 0x00, 0x01
50};
51static const int alb_delta_in_ticks = HZ / ALB_TIMER_TICKS_PER_SEC;
52
53#pragma pack(1)
54struct learning_pkt {
55 u8 mac_dst[ETH_ALEN];
56 u8 mac_src[ETH_ALEN];
57 __be16 type;
58 u8 padding[ETH_ZLEN - ETH_HLEN];
59};
60
61struct arp_pkt {
62 __be16 hw_addr_space;
63 __be16 prot_addr_space;
64 u8 hw_addr_len;
65 u8 prot_addr_len;
66 __be16 op_code;
67 u8 mac_src[ETH_ALEN];
68 __be32 ip_src;
69 u8 mac_dst[ETH_ALEN];
70 __be32 ip_dst;
71};
72#pragma pack()
73
74static inline struct arp_pkt *arp_pkt(const struct sk_buff *skb)
75{
76 return (struct arp_pkt *)skb_network_header(skb);
77}
78
79
80static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[],
81 bool strict_match);
82static void rlb_purge_src_ip(struct bonding *bond, struct arp_pkt *arp);
83static void rlb_src_unlink(struct bonding *bond, u32 index);
84static void rlb_src_link(struct bonding *bond, u32 ip_src_hash,
85 u32 ip_dst_hash);
86
87static inline u8 _simple_hash(const u8 *hash_start, int hash_size)
88{
89 int i;
90 u8 hash = 0;
91
92 for (i = 0; i < hash_size; i++)
93 hash ^= hash_start[i];
94
95 return hash;
96}
97
98
99
100static inline void tlb_init_table_entry(struct tlb_client_info *entry, int save_load)
101{
102 if (save_load) {
103 entry->load_history = 1 + entry->tx_bytes /
104 BOND_TLB_REBALANCE_INTERVAL;
105 entry->tx_bytes = 0;
106 }
107
108 entry->tx_slave = NULL;
109 entry->next = TLB_NULL_INDEX;
110 entry->prev = TLB_NULL_INDEX;
111}
112
113static inline void tlb_init_slave(struct slave *slave)
114{
115 SLAVE_TLB_INFO(slave).load = 0;
116 SLAVE_TLB_INFO(slave).head = TLB_NULL_INDEX;
117}
118
119static void __tlb_clear_slave(struct bonding *bond, struct slave *slave,
120 int save_load)
121{
122 struct tlb_client_info *tx_hash_table;
123 u32 index;
124
125
126 tx_hash_table = BOND_ALB_INFO(bond).tx_hashtbl;
127
128
129 if (tx_hash_table) {
130 index = SLAVE_TLB_INFO(slave).head;
131 while (index != TLB_NULL_INDEX) {
132 u32 next_index = tx_hash_table[index].next;
133 tlb_init_table_entry(&tx_hash_table[index], save_load);
134 index = next_index;
135 }
136 }
137
138 tlb_init_slave(slave);
139}
140
141static void tlb_clear_slave(struct bonding *bond, struct slave *slave,
142 int save_load)
143{
144 spin_lock_bh(&bond->mode_lock);
145 __tlb_clear_slave(bond, slave, save_load);
146 spin_unlock_bh(&bond->mode_lock);
147}
148
149
150static int tlb_initialize(struct bonding *bond)
151{
152 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
153 int size = TLB_HASH_TABLE_SIZE * sizeof(struct tlb_client_info);
154 struct tlb_client_info *new_hashtbl;
155 int i;
156
157 new_hashtbl = kzalloc(size, GFP_KERNEL);
158 if (!new_hashtbl)
159 return -ENOMEM;
160
161 spin_lock_bh(&bond->mode_lock);
162
163 bond_info->tx_hashtbl = new_hashtbl;
164
165 for (i = 0; i < TLB_HASH_TABLE_SIZE; i++)
166 tlb_init_table_entry(&bond_info->tx_hashtbl[i], 0);
167
168 spin_unlock_bh(&bond->mode_lock);
169
170 return 0;
171}
172
173
174static void tlb_deinitialize(struct bonding *bond)
175{
176 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
177
178 spin_lock_bh(&bond->mode_lock);
179
180 kfree(bond_info->tx_hashtbl);
181 bond_info->tx_hashtbl = NULL;
182
183 spin_unlock_bh(&bond->mode_lock);
184}
185
186static long long compute_gap(struct slave *slave)
187{
188 return (s64) (slave->speed << 20) -
189 (s64) (SLAVE_TLB_INFO(slave).load << 3);
190}
191
192static struct slave *tlb_get_least_loaded_slave(struct bonding *bond)
193{
194 struct slave *slave, *least_loaded;
195 struct list_head *iter;
196 long long max_gap;
197
198 least_loaded = NULL;
199 max_gap = LLONG_MIN;
200
201
202 bond_for_each_slave_rcu(bond, slave, iter) {
203 if (bond_slave_can_tx(slave)) {
204 long long gap = compute_gap(slave);
205
206 if (max_gap < gap) {
207 least_loaded = slave;
208 max_gap = gap;
209 }
210 }
211 }
212
213 return least_loaded;
214}
215
216static struct slave *__tlb_choose_channel(struct bonding *bond, u32 hash_index,
217 u32 skb_len)
218{
219 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
220 struct tlb_client_info *hash_table;
221 struct slave *assigned_slave;
222
223 hash_table = bond_info->tx_hashtbl;
224 assigned_slave = hash_table[hash_index].tx_slave;
225 if (!assigned_slave) {
226 assigned_slave = tlb_get_least_loaded_slave(bond);
227
228 if (assigned_slave) {
229 struct tlb_slave_info *slave_info =
230 &(SLAVE_TLB_INFO(assigned_slave));
231 u32 next_index = slave_info->head;
232
233 hash_table[hash_index].tx_slave = assigned_slave;
234 hash_table[hash_index].next = next_index;
235 hash_table[hash_index].prev = TLB_NULL_INDEX;
236
237 if (next_index != TLB_NULL_INDEX)
238 hash_table[next_index].prev = hash_index;
239
240 slave_info->head = hash_index;
241 slave_info->load +=
242 hash_table[hash_index].load_history;
243 }
244 }
245
246 if (assigned_slave)
247 hash_table[hash_index].tx_bytes += skb_len;
248
249 return assigned_slave;
250}
251
252static struct slave *tlb_choose_channel(struct bonding *bond, u32 hash_index,
253 u32 skb_len)
254{
255 struct slave *tx_slave;
256
257
258
259
260
261 spin_lock(&bond->mode_lock);
262 tx_slave = __tlb_choose_channel(bond, hash_index, skb_len);
263 spin_unlock(&bond->mode_lock);
264
265 return tx_slave;
266}
267
268
269
270
271
272
273static void rlb_update_entry_from_arp(struct bonding *bond, struct arp_pkt *arp)
274{
275 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
276 struct rlb_client_info *client_info;
277 u32 hash_index;
278
279 spin_lock_bh(&bond->mode_lock);
280
281 hash_index = _simple_hash((u8 *)&(arp->ip_src), sizeof(arp->ip_src));
282 client_info = &(bond_info->rx_hashtbl[hash_index]);
283
284 if ((client_info->assigned) &&
285 (client_info->ip_src == arp->ip_dst) &&
286 (client_info->ip_dst == arp->ip_src) &&
287 (!ether_addr_equal_64bits(client_info->mac_dst, arp->mac_src))) {
288
289 ether_addr_copy(client_info->mac_dst, arp->mac_src);
290 client_info->ntt = 1;
291 bond_info->rx_ntt = 1;
292 }
293
294 spin_unlock_bh(&bond->mode_lock);
295}
296
297static int rlb_arp_recv(const struct sk_buff *skb, struct bonding *bond,
298 struct slave *slave)
299{
300 struct arp_pkt *arp, _arp;
301
302 if (skb->protocol != cpu_to_be16(ETH_P_ARP))
303 goto out;
304
305 arp = skb_header_pointer(skb, 0, sizeof(_arp), &_arp);
306 if (!arp)
307 goto out;
308
309
310
311
312
313
314
315
316
317
318
319 rlb_purge_src_ip(bond, arp);
320
321 if (arp->op_code == htons(ARPOP_REPLY)) {
322
323 rlb_update_entry_from_arp(bond, arp);
324 netdev_dbg(bond->dev, "Server received an ARP Reply from client\n");
325 }
326out:
327 return RX_HANDLER_ANOTHER;
328}
329
330
331static struct slave *__rlb_next_rx_slave(struct bonding *bond)
332{
333 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
334 struct slave *before = NULL, *rx_slave = NULL, *slave;
335 struct list_head *iter;
336 bool found = false;
337
338 bond_for_each_slave_rcu(bond, slave, iter) {
339 if (!bond_slave_can_tx(slave))
340 continue;
341 if (!found) {
342 if (!before || before->speed < slave->speed)
343 before = slave;
344 } else {
345 if (!rx_slave || rx_slave->speed < slave->speed)
346 rx_slave = slave;
347 }
348 if (slave == bond_info->rx_slave)
349 found = true;
350 }
351
352
353
354 if (!rx_slave || (before && rx_slave->speed < before->speed))
355 rx_slave = before;
356
357 if (rx_slave)
358 bond_info->rx_slave = rx_slave;
359
360 return rx_slave;
361}
362
363
364static struct slave *rlb_next_rx_slave(struct bonding *bond)
365{
366 struct slave *rx_slave;
367
368 ASSERT_RTNL();
369
370 rcu_read_lock();
371 rx_slave = __rlb_next_rx_slave(bond);
372 rcu_read_unlock();
373
374 return rx_slave;
375}
376
377
378
379
380
381
382static void rlb_teach_disabled_mac_on_primary(struct bonding *bond, u8 addr[])
383{
384 struct slave *curr_active = rtnl_dereference(bond->curr_active_slave);
385
386 if (!curr_active)
387 return;
388
389 if (!bond->alb_info.primary_is_promisc) {
390 if (!dev_set_promiscuity(curr_active->dev, 1))
391 bond->alb_info.primary_is_promisc = 1;
392 else
393 bond->alb_info.primary_is_promisc = 0;
394 }
395
396 bond->alb_info.rlb_promisc_timeout_counter = 0;
397
398 alb_send_learning_packets(curr_active, addr, true);
399}
400
401
402
403
404
405static void rlb_clear_slave(struct bonding *bond, struct slave *slave)
406{
407 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
408 struct rlb_client_info *rx_hash_table;
409 u32 index, next_index;
410
411
412 spin_lock_bh(&bond->mode_lock);
413
414 rx_hash_table = bond_info->rx_hashtbl;
415 index = bond_info->rx_hashtbl_used_head;
416 for (; index != RLB_NULL_INDEX; index = next_index) {
417 next_index = rx_hash_table[index].used_next;
418 if (rx_hash_table[index].slave == slave) {
419 struct slave *assigned_slave = rlb_next_rx_slave(bond);
420
421 if (assigned_slave) {
422 rx_hash_table[index].slave = assigned_slave;
423 if (!ether_addr_equal_64bits(rx_hash_table[index].mac_dst,
424 mac_bcast)) {
425 bond_info->rx_hashtbl[index].ntt = 1;
426 bond_info->rx_ntt = 1;
427
428
429
430
431
432
433
434 bond_info->rlb_update_retry_counter =
435 RLB_UPDATE_RETRY;
436 }
437 } else {
438 rx_hash_table[index].slave = NULL;
439 }
440 }
441 }
442
443 spin_unlock_bh(&bond->mode_lock);
444
445 if (slave != rtnl_dereference(bond->curr_active_slave))
446 rlb_teach_disabled_mac_on_primary(bond, slave->dev->dev_addr);
447}
448
449static void rlb_update_client(struct rlb_client_info *client_info)
450{
451 int i;
452
453 if (!client_info->slave || !is_valid_ether_addr(client_info->mac_dst))
454 return;
455
456 for (i = 0; i < RLB_ARP_BURST_SIZE; i++) {
457 struct sk_buff *skb;
458
459 skb = arp_create(ARPOP_REPLY, ETH_P_ARP,
460 client_info->ip_dst,
461 client_info->slave->dev,
462 client_info->ip_src,
463 client_info->mac_dst,
464 client_info->slave->dev->dev_addr,
465 client_info->mac_dst);
466 if (!skb) {
467 netdev_err(client_info->slave->bond->dev,
468 "failed to create an ARP packet\n");
469 continue;
470 }
471
472 skb->dev = client_info->slave->dev;
473
474 if (client_info->vlan_id) {
475 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
476 client_info->vlan_id);
477 }
478
479 arp_xmit(skb);
480 }
481}
482
483
484static void rlb_update_rx_clients(struct bonding *bond)
485{
486 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
487 struct rlb_client_info *client_info;
488 u32 hash_index;
489
490 spin_lock_bh(&bond->mode_lock);
491
492 hash_index = bond_info->rx_hashtbl_used_head;
493 for (; hash_index != RLB_NULL_INDEX;
494 hash_index = client_info->used_next) {
495 client_info = &(bond_info->rx_hashtbl[hash_index]);
496 if (client_info->ntt) {
497 rlb_update_client(client_info);
498 if (bond_info->rlb_update_retry_counter == 0)
499 client_info->ntt = 0;
500 }
501 }
502
503
504
505
506 bond_info->rlb_update_delay_counter = RLB_UPDATE_DELAY;
507
508 spin_unlock_bh(&bond->mode_lock);
509}
510
511
512static void rlb_req_update_slave_clients(struct bonding *bond, struct slave *slave)
513{
514 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
515 struct rlb_client_info *client_info;
516 int ntt = 0;
517 u32 hash_index;
518
519 spin_lock_bh(&bond->mode_lock);
520
521 hash_index = bond_info->rx_hashtbl_used_head;
522 for (; hash_index != RLB_NULL_INDEX;
523 hash_index = client_info->used_next) {
524 client_info = &(bond_info->rx_hashtbl[hash_index]);
525
526 if ((client_info->slave == slave) &&
527 !ether_addr_equal_64bits(client_info->mac_dst, mac_bcast)) {
528 client_info->ntt = 1;
529 ntt = 1;
530 }
531 }
532
533
534 if (ntt) {
535 bond_info->rx_ntt = 1;
536
537 bond_info->rlb_update_retry_counter = RLB_UPDATE_RETRY;
538 }
539
540 spin_unlock_bh(&bond->mode_lock);
541}
542
543
544static void rlb_req_update_subnet_clients(struct bonding *bond, __be32 src_ip)
545{
546 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
547 struct rlb_client_info *client_info;
548 u32 hash_index;
549
550 spin_lock(&bond->mode_lock);
551
552 hash_index = bond_info->rx_hashtbl_used_head;
553 for (; hash_index != RLB_NULL_INDEX;
554 hash_index = client_info->used_next) {
555 client_info = &(bond_info->rx_hashtbl[hash_index]);
556
557 if (!client_info->slave) {
558 netdev_err(bond->dev, "found a client with no channel in the client's hash table\n");
559 continue;
560 }
561
562
563
564
565 if ((client_info->ip_src == src_ip) &&
566 !ether_addr_equal_64bits(client_info->slave->dev->dev_addr,
567 bond->dev->dev_addr) &&
568 !ether_addr_equal_64bits(client_info->mac_dst, mac_bcast)) {
569 client_info->ntt = 1;
570 bond_info->rx_ntt = 1;
571 }
572 }
573
574 spin_unlock(&bond->mode_lock);
575}
576
577static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bond)
578{
579 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
580 struct arp_pkt *arp = arp_pkt(skb);
581 struct slave *assigned_slave, *curr_active_slave;
582 struct rlb_client_info *client_info;
583 u32 hash_index = 0;
584
585 spin_lock(&bond->mode_lock);
586
587 curr_active_slave = rcu_dereference(bond->curr_active_slave);
588
589 hash_index = _simple_hash((u8 *)&arp->ip_dst, sizeof(arp->ip_dst));
590 client_info = &(bond_info->rx_hashtbl[hash_index]);
591
592 if (client_info->assigned) {
593 if ((client_info->ip_src == arp->ip_src) &&
594 (client_info->ip_dst == arp->ip_dst)) {
595
596 if (!ether_addr_equal_64bits(arp->mac_dst, mac_bcast)) {
597
598 ether_addr_copy(client_info->mac_dst, arp->mac_dst);
599 }
600 ether_addr_copy(client_info->mac_src, arp->mac_src);
601
602 assigned_slave = client_info->slave;
603 if (assigned_slave) {
604 spin_unlock(&bond->mode_lock);
605 return assigned_slave;
606 }
607 } else {
608
609
610
611
612 if (curr_active_slave &&
613 client_info->slave != curr_active_slave) {
614 client_info->slave = curr_active_slave;
615 rlb_update_client(client_info);
616 }
617 }
618 }
619
620 assigned_slave = __rlb_next_rx_slave(bond);
621
622 if (assigned_slave) {
623 if (!(client_info->assigned &&
624 client_info->ip_src == arp->ip_src)) {
625
626
627
628 u32 hash_src = _simple_hash((u8 *)&arp->ip_src,
629 sizeof(arp->ip_src));
630 rlb_src_unlink(bond, hash_index);
631 rlb_src_link(bond, hash_src, hash_index);
632 }
633
634 client_info->ip_src = arp->ip_src;
635 client_info->ip_dst = arp->ip_dst;
636
637
638
639
640 ether_addr_copy(client_info->mac_dst, arp->mac_dst);
641 ether_addr_copy(client_info->mac_src, arp->mac_src);
642 client_info->slave = assigned_slave;
643
644 if (!ether_addr_equal_64bits(client_info->mac_dst, mac_bcast)) {
645 client_info->ntt = 1;
646 bond->alb_info.rx_ntt = 1;
647 } else {
648 client_info->ntt = 0;
649 }
650
651 if (vlan_get_tag(skb, &client_info->vlan_id))
652 client_info->vlan_id = 0;
653
654 if (!client_info->assigned) {
655 u32 prev_tbl_head = bond_info->rx_hashtbl_used_head;
656 bond_info->rx_hashtbl_used_head = hash_index;
657 client_info->used_next = prev_tbl_head;
658 if (prev_tbl_head != RLB_NULL_INDEX) {
659 bond_info->rx_hashtbl[prev_tbl_head].used_prev =
660 hash_index;
661 }
662 client_info->assigned = 1;
663 }
664 }
665
666 spin_unlock(&bond->mode_lock);
667
668 return assigned_slave;
669}
670
671
672
673
674
675static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond)
676{
677 struct arp_pkt *arp = arp_pkt(skb);
678 struct slave *tx_slave = NULL;
679
680
681
682
683 if (!bond_slave_has_mac_rx(bond, arp->mac_src))
684 return NULL;
685
686 if (arp->op_code == htons(ARPOP_REPLY)) {
687
688 tx_slave = rlb_choose_channel(skb, bond);
689 if (tx_slave)
690 bond_hw_addr_copy(arp->mac_src, tx_slave->dev->dev_addr,
691 tx_slave->dev->addr_len);
692 netdev_dbg(bond->dev, "Server sent ARP Reply packet\n");
693 } else if (arp->op_code == htons(ARPOP_REQUEST)) {
694
695
696
697
698
699 rlb_choose_channel(skb, bond);
700
701
702
703
704 bond->alb_info.rlb_update_delay_counter = RLB_UPDATE_DELAY;
705
706
707
708
709
710
711 rlb_req_update_subnet_clients(bond, arp->ip_src);
712 netdev_dbg(bond->dev, "Server sent ARP Request packet\n");
713 }
714
715 return tx_slave;
716}
717
718static void rlb_rebalance(struct bonding *bond)
719{
720 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
721 struct slave *assigned_slave;
722 struct rlb_client_info *client_info;
723 int ntt;
724 u32 hash_index;
725
726 spin_lock_bh(&bond->mode_lock);
727
728 ntt = 0;
729 hash_index = bond_info->rx_hashtbl_used_head;
730 for (; hash_index != RLB_NULL_INDEX;
731 hash_index = client_info->used_next) {
732 client_info = &(bond_info->rx_hashtbl[hash_index]);
733 assigned_slave = __rlb_next_rx_slave(bond);
734 if (assigned_slave && (client_info->slave != assigned_slave)) {
735 client_info->slave = assigned_slave;
736 client_info->ntt = 1;
737 ntt = 1;
738 }
739 }
740
741
742 if (ntt)
743 bond_info->rx_ntt = 1;
744 spin_unlock_bh(&bond->mode_lock);
745}
746
747
748static void rlb_init_table_entry_dst(struct rlb_client_info *entry)
749{
750 entry->used_next = RLB_NULL_INDEX;
751 entry->used_prev = RLB_NULL_INDEX;
752 entry->assigned = 0;
753 entry->slave = NULL;
754 entry->vlan_id = 0;
755}
756static void rlb_init_table_entry_src(struct rlb_client_info *entry)
757{
758 entry->src_first = RLB_NULL_INDEX;
759 entry->src_prev = RLB_NULL_INDEX;
760 entry->src_next = RLB_NULL_INDEX;
761}
762
763static void rlb_init_table_entry(struct rlb_client_info *entry)
764{
765 memset(entry, 0, sizeof(struct rlb_client_info));
766 rlb_init_table_entry_dst(entry);
767 rlb_init_table_entry_src(entry);
768}
769
770static void rlb_delete_table_entry_dst(struct bonding *bond, u32 index)
771{
772 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
773 u32 next_index = bond_info->rx_hashtbl[index].used_next;
774 u32 prev_index = bond_info->rx_hashtbl[index].used_prev;
775
776 if (index == bond_info->rx_hashtbl_used_head)
777 bond_info->rx_hashtbl_used_head = next_index;
778 if (prev_index != RLB_NULL_INDEX)
779 bond_info->rx_hashtbl[prev_index].used_next = next_index;
780 if (next_index != RLB_NULL_INDEX)
781 bond_info->rx_hashtbl[next_index].used_prev = prev_index;
782}
783
784
785static void rlb_src_unlink(struct bonding *bond, u32 index)
786{
787 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
788 u32 next_index = bond_info->rx_hashtbl[index].src_next;
789 u32 prev_index = bond_info->rx_hashtbl[index].src_prev;
790
791 bond_info->rx_hashtbl[index].src_next = RLB_NULL_INDEX;
792 bond_info->rx_hashtbl[index].src_prev = RLB_NULL_INDEX;
793
794 if (next_index != RLB_NULL_INDEX)
795 bond_info->rx_hashtbl[next_index].src_prev = prev_index;
796
797 if (prev_index == RLB_NULL_INDEX)
798 return;
799
800
801 if (bond_info->rx_hashtbl[prev_index].src_first == index)
802 bond_info->rx_hashtbl[prev_index].src_first = next_index;
803 else
804 bond_info->rx_hashtbl[prev_index].src_next = next_index;
805
806}
807
808static void rlb_delete_table_entry(struct bonding *bond, u32 index)
809{
810 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
811 struct rlb_client_info *entry = &(bond_info->rx_hashtbl[index]);
812
813 rlb_delete_table_entry_dst(bond, index);
814 rlb_init_table_entry_dst(entry);
815
816 rlb_src_unlink(bond, index);
817}
818
819
820
821
822static void rlb_src_link(struct bonding *bond, u32 ip_src_hash, u32 ip_dst_hash)
823{
824 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
825 u32 next;
826
827 bond_info->rx_hashtbl[ip_dst_hash].src_prev = ip_src_hash;
828 next = bond_info->rx_hashtbl[ip_src_hash].src_first;
829 bond_info->rx_hashtbl[ip_dst_hash].src_next = next;
830 if (next != RLB_NULL_INDEX)
831 bond_info->rx_hashtbl[next].src_prev = ip_dst_hash;
832 bond_info->rx_hashtbl[ip_src_hash].src_first = ip_dst_hash;
833}
834
835
836
837
838static void rlb_purge_src_ip(struct bonding *bond, struct arp_pkt *arp)
839{
840 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
841 u32 ip_src_hash = _simple_hash((u8 *)&(arp->ip_src), sizeof(arp->ip_src));
842 u32 index;
843
844 spin_lock_bh(&bond->mode_lock);
845
846 index = bond_info->rx_hashtbl[ip_src_hash].src_first;
847 while (index != RLB_NULL_INDEX) {
848 struct rlb_client_info *entry = &(bond_info->rx_hashtbl[index]);
849 u32 next_index = entry->src_next;
850 if (entry->ip_src == arp->ip_src &&
851 !ether_addr_equal_64bits(arp->mac_src, entry->mac_src))
852 rlb_delete_table_entry(bond, index);
853 index = next_index;
854 }
855 spin_unlock_bh(&bond->mode_lock);
856}
857
858static int rlb_initialize(struct bonding *bond)
859{
860 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
861 struct rlb_client_info *new_hashtbl;
862 int size = RLB_HASH_TABLE_SIZE * sizeof(struct rlb_client_info);
863 int i;
864
865 new_hashtbl = kmalloc(size, GFP_KERNEL);
866 if (!new_hashtbl)
867 return -1;
868
869 spin_lock_bh(&bond->mode_lock);
870
871 bond_info->rx_hashtbl = new_hashtbl;
872
873 bond_info->rx_hashtbl_used_head = RLB_NULL_INDEX;
874
875 for (i = 0; i < RLB_HASH_TABLE_SIZE; i++)
876 rlb_init_table_entry(bond_info->rx_hashtbl + i);
877
878 spin_unlock_bh(&bond->mode_lock);
879
880
881 bond->recv_probe = rlb_arp_recv;
882
883 return 0;
884}
885
886static void rlb_deinitialize(struct bonding *bond)
887{
888 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
889
890 spin_lock_bh(&bond->mode_lock);
891
892 kfree(bond_info->rx_hashtbl);
893 bond_info->rx_hashtbl = NULL;
894 bond_info->rx_hashtbl_used_head = RLB_NULL_INDEX;
895
896 spin_unlock_bh(&bond->mode_lock);
897}
898
899static void rlb_clear_vlan(struct bonding *bond, unsigned short vlan_id)
900{
901 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
902 u32 curr_index;
903
904 spin_lock_bh(&bond->mode_lock);
905
906 curr_index = bond_info->rx_hashtbl_used_head;
907 while (curr_index != RLB_NULL_INDEX) {
908 struct rlb_client_info *curr = &(bond_info->rx_hashtbl[curr_index]);
909 u32 next_index = bond_info->rx_hashtbl[curr_index].used_next;
910
911 if (curr->vlan_id == vlan_id)
912 rlb_delete_table_entry(bond, curr_index);
913
914 curr_index = next_index;
915 }
916
917 spin_unlock_bh(&bond->mode_lock);
918}
919
920
921
922static void alb_send_lp_vid(struct slave *slave, u8 mac_addr[],
923 __be16 vlan_proto, u16 vid)
924{
925 struct learning_pkt pkt;
926 struct sk_buff *skb;
927 int size = sizeof(struct learning_pkt);
928
929 memset(&pkt, 0, size);
930 ether_addr_copy(pkt.mac_dst, mac_addr);
931 ether_addr_copy(pkt.mac_src, mac_addr);
932 pkt.type = cpu_to_be16(ETH_P_LOOPBACK);
933
934 skb = dev_alloc_skb(size);
935 if (!skb)
936 return;
937
938 skb_put_data(skb, &pkt, size);
939
940 skb_reset_mac_header(skb);
941 skb->network_header = skb->mac_header + ETH_HLEN;
942 skb->protocol = pkt.type;
943 skb->priority = TC_PRIO_CONTROL;
944 skb->dev = slave->dev;
945
946 netdev_dbg(slave->bond->dev,
947 "Send learning packet: dev %s mac %pM vlan %d\n",
948 slave->dev->name, mac_addr, vid);
949
950 if (vid)
951 __vlan_hwaccel_put_tag(skb, vlan_proto, vid);
952
953 dev_queue_xmit(skb);
954}
955
956struct alb_walk_data {
957 struct bonding *bond;
958 struct slave *slave;
959 u8 *mac_addr;
960 bool strict_match;
961};
962
963static int alb_upper_dev_walk(struct net_device *upper, void *_data)
964{
965 struct alb_walk_data *data = _data;
966 bool strict_match = data->strict_match;
967 struct bonding *bond = data->bond;
968 struct slave *slave = data->slave;
969 u8 *mac_addr = data->mac_addr;
970 struct bond_vlan_tag *tags;
971
972 if (is_vlan_dev(upper) &&
973 bond->nest_level == vlan_get_encap_level(upper) - 1) {
974 if (upper->addr_assign_type == NET_ADDR_STOLEN) {
975 alb_send_lp_vid(slave, mac_addr,
976 vlan_dev_vlan_proto(upper),
977 vlan_dev_vlan_id(upper));
978 } else {
979 alb_send_lp_vid(slave, upper->dev_addr,
980 vlan_dev_vlan_proto(upper),
981 vlan_dev_vlan_id(upper));
982 }
983 }
984
985
986
987
988 if (netif_is_macvlan(upper) && !strict_match) {
989 tags = bond_verify_device_path(bond->dev, upper, 0);
990 if (IS_ERR_OR_NULL(tags))
991 BUG();
992 alb_send_lp_vid(slave, upper->dev_addr,
993 tags[0].vlan_proto, tags[0].vlan_id);
994 kfree(tags);
995 }
996
997 return 0;
998}
999
1000static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[],
1001 bool strict_match)
1002{
1003 struct bonding *bond = bond_get_bond_by_slave(slave);
1004 struct alb_walk_data data = {
1005 .strict_match = strict_match,
1006 .mac_addr = mac_addr,
1007 .slave = slave,
1008 .bond = bond,
1009 };
1010
1011
1012 alb_send_lp_vid(slave, mac_addr, 0, 0);
1013
1014
1015
1016
1017 rcu_read_lock();
1018 netdev_walk_all_upper_dev_rcu(bond->dev, alb_upper_dev_walk, &data);
1019 rcu_read_unlock();
1020}
1021
1022static int alb_set_slave_mac_addr(struct slave *slave, u8 addr[],
1023 unsigned int len)
1024{
1025 struct net_device *dev = slave->dev;
1026 struct sockaddr_storage ss;
1027
1028 if (BOND_MODE(slave->bond) == BOND_MODE_TLB) {
1029 memcpy(dev->dev_addr, addr, len);
1030 return 0;
1031 }
1032
1033
1034
1035
1036 memcpy(ss.__data, addr, len);
1037 ss.ss_family = dev->type;
1038 if (dev_set_mac_address(dev, (struct sockaddr *)&ss)) {
1039 netdev_err(slave->bond->dev, "dev_set_mac_address of dev %s failed! ALB mode requires that the base driver support setting the hw address also when the network device's interface is open\n",
1040 dev->name);
1041 return -EOPNOTSUPP;
1042 }
1043 return 0;
1044}
1045
1046
1047
1048
1049
1050static void alb_swap_mac_addr(struct slave *slave1, struct slave *slave2)
1051{
1052 u8 tmp_mac_addr[MAX_ADDR_LEN];
1053
1054 bond_hw_addr_copy(tmp_mac_addr, slave1->dev->dev_addr,
1055 slave1->dev->addr_len);
1056 alb_set_slave_mac_addr(slave1, slave2->dev->dev_addr,
1057 slave2->dev->addr_len);
1058 alb_set_slave_mac_addr(slave2, tmp_mac_addr,
1059 slave1->dev->addr_len);
1060
1061}
1062
1063
1064
1065
1066
1067static void alb_fasten_mac_swap(struct bonding *bond, struct slave *slave1,
1068 struct slave *slave2)
1069{
1070 int slaves_state_differ = (bond_slave_can_tx(slave1) != bond_slave_can_tx(slave2));
1071 struct slave *disabled_slave = NULL;
1072
1073 ASSERT_RTNL();
1074
1075
1076 if (bond_slave_can_tx(slave1)) {
1077 alb_send_learning_packets(slave1, slave1->dev->dev_addr, false);
1078 if (bond->alb_info.rlb_enabled) {
1079
1080
1081
1082 rlb_req_update_slave_clients(bond, slave1);
1083 }
1084 } else {
1085 disabled_slave = slave1;
1086 }
1087
1088 if (bond_slave_can_tx(slave2)) {
1089 alb_send_learning_packets(slave2, slave2->dev->dev_addr, false);
1090 if (bond->alb_info.rlb_enabled) {
1091
1092
1093
1094 rlb_req_update_slave_clients(bond, slave2);
1095 }
1096 } else {
1097 disabled_slave = slave2;
1098 }
1099
1100 if (bond->alb_info.rlb_enabled && slaves_state_differ) {
1101
1102 rlb_teach_disabled_mac_on_primary(bond,
1103 disabled_slave->dev->dev_addr);
1104 }
1105}
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121static void alb_change_hw_addr_on_detach(struct bonding *bond, struct slave *slave)
1122{
1123 int perm_curr_diff;
1124 int perm_bond_diff;
1125 struct slave *found_slave;
1126
1127 perm_curr_diff = !ether_addr_equal_64bits(slave->perm_hwaddr,
1128 slave->dev->dev_addr);
1129 perm_bond_diff = !ether_addr_equal_64bits(slave->perm_hwaddr,
1130 bond->dev->dev_addr);
1131
1132 if (perm_curr_diff && perm_bond_diff) {
1133 found_slave = bond_slave_has_mac(bond, slave->perm_hwaddr);
1134
1135 if (found_slave) {
1136 alb_swap_mac_addr(slave, found_slave);
1137 alb_fasten_mac_swap(bond, slave, found_slave);
1138 }
1139 }
1140}
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164static int alb_handle_addr_collision_on_attach(struct bonding *bond, struct slave *slave)
1165{
1166 struct slave *has_bond_addr = rcu_access_pointer(bond->curr_active_slave);
1167 struct slave *tmp_slave1, *free_mac_slave = NULL;
1168 struct list_head *iter;
1169
1170 if (!bond_has_slaves(bond)) {
1171
1172 return 0;
1173 }
1174
1175
1176
1177
1178
1179 if (!ether_addr_equal_64bits(slave->perm_hwaddr, bond->dev->dev_addr)) {
1180 if (!bond_slave_has_mac(bond, slave->dev->dev_addr))
1181 return 0;
1182
1183
1184
1185
1186 alb_set_slave_mac_addr(slave, bond->dev->dev_addr,
1187 bond->dev->addr_len);
1188 }
1189
1190
1191
1192
1193 bond_for_each_slave(bond, tmp_slave1, iter) {
1194 if (!bond_slave_has_mac(bond, tmp_slave1->perm_hwaddr)) {
1195
1196
1197
1198 free_mac_slave = tmp_slave1;
1199 break;
1200 }
1201
1202 if (!has_bond_addr) {
1203 if (ether_addr_equal_64bits(tmp_slave1->dev->dev_addr,
1204 bond->dev->dev_addr)) {
1205
1206 has_bond_addr = tmp_slave1;
1207 }
1208 }
1209 }
1210
1211 if (free_mac_slave) {
1212 alb_set_slave_mac_addr(slave, free_mac_slave->perm_hwaddr,
1213 free_mac_slave->dev->addr_len);
1214
1215 netdev_warn(bond->dev, "the hw address of slave %s is in use by the bond; giving it the hw address of %s\n",
1216 slave->dev->name, free_mac_slave->dev->name);
1217
1218 } else if (has_bond_addr) {
1219 netdev_err(bond->dev, "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",
1220 slave->dev->name);
1221 return -EFAULT;
1222 }
1223
1224 return 0;
1225}
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241static int alb_set_mac_address(struct bonding *bond, void *addr)
1242{
1243 struct slave *slave, *rollback_slave;
1244 struct list_head *iter;
1245 struct sockaddr_storage ss;
1246 char tmp_addr[MAX_ADDR_LEN];
1247 int res;
1248
1249 if (bond->alb_info.rlb_enabled)
1250 return 0;
1251
1252 bond_for_each_slave(bond, slave, iter) {
1253
1254 bond_hw_addr_copy(tmp_addr, slave->dev->dev_addr,
1255 slave->dev->addr_len);
1256
1257 res = dev_set_mac_address(slave->dev, addr);
1258
1259
1260 bond_hw_addr_copy(slave->dev->dev_addr, tmp_addr,
1261 slave->dev->addr_len);
1262
1263 if (res)
1264 goto unwind;
1265 }
1266
1267 return 0;
1268
1269unwind:
1270 memcpy(ss.__data, bond->dev->dev_addr, bond->dev->addr_len);
1271 ss.ss_family = bond->dev->type;
1272
1273
1274 bond_for_each_slave(bond, rollback_slave, iter) {
1275 if (rollback_slave == slave)
1276 break;
1277 bond_hw_addr_copy(tmp_addr, rollback_slave->dev->dev_addr,
1278 rollback_slave->dev->addr_len);
1279 dev_set_mac_address(rollback_slave->dev,
1280 (struct sockaddr *)&ss);
1281 bond_hw_addr_copy(rollback_slave->dev->dev_addr, tmp_addr,
1282 rollback_slave->dev->addr_len);
1283 }
1284
1285 return res;
1286}
1287
1288
1289
1290int bond_alb_initialize(struct bonding *bond, int rlb_enabled)
1291{
1292 int res;
1293
1294 res = tlb_initialize(bond);
1295 if (res)
1296 return res;
1297
1298 if (rlb_enabled) {
1299 bond->alb_info.rlb_enabled = 1;
1300 res = rlb_initialize(bond);
1301 if (res) {
1302 tlb_deinitialize(bond);
1303 return res;
1304 }
1305 } else {
1306 bond->alb_info.rlb_enabled = 0;
1307 }
1308
1309 return 0;
1310}
1311
1312void bond_alb_deinitialize(struct bonding *bond)
1313{
1314 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
1315
1316 tlb_deinitialize(bond);
1317
1318 if (bond_info->rlb_enabled)
1319 rlb_deinitialize(bond);
1320}
1321
1322static int bond_do_alb_xmit(struct sk_buff *skb, struct bonding *bond,
1323 struct slave *tx_slave)
1324{
1325 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
1326 struct ethhdr *eth_data = eth_hdr(skb);
1327
1328 if (!tx_slave) {
1329
1330 tx_slave = rcu_dereference(bond->curr_active_slave);
1331 if (bond->params.tlb_dynamic_lb)
1332 bond_info->unbalanced_load += skb->len;
1333 }
1334
1335 if (tx_slave && bond_slave_can_tx(tx_slave)) {
1336 if (tx_slave != rcu_access_pointer(bond->curr_active_slave)) {
1337 ether_addr_copy(eth_data->h_source,
1338 tx_slave->dev->dev_addr);
1339 }
1340
1341 bond_dev_queue_xmit(bond, skb, tx_slave->dev);
1342 goto out;
1343 }
1344
1345 if (tx_slave && bond->params.tlb_dynamic_lb) {
1346 spin_lock(&bond->mode_lock);
1347 __tlb_clear_slave(bond, tx_slave, 0);
1348 spin_unlock(&bond->mode_lock);
1349 }
1350
1351
1352 bond_tx_drop(bond->dev, skb);
1353out:
1354 return NETDEV_TX_OK;
1355}
1356
1357int bond_tlb_xmit(struct sk_buff *skb, struct net_device *bond_dev)
1358{
1359 struct bonding *bond = netdev_priv(bond_dev);
1360 struct ethhdr *eth_data;
1361 struct slave *tx_slave = NULL;
1362 u32 hash_index;
1363
1364 skb_reset_mac_header(skb);
1365 eth_data = eth_hdr(skb);
1366
1367
1368 if (!is_multicast_ether_addr(eth_data->h_dest)) {
1369 switch (skb->protocol) {
1370 case htons(ETH_P_IP):
1371 case htons(ETH_P_IPX):
1372
1373 case htons(ETH_P_IPV6):
1374 hash_index = bond_xmit_hash(bond, skb);
1375 if (bond->params.tlb_dynamic_lb) {
1376 tx_slave = tlb_choose_channel(bond,
1377 hash_index & 0xFF,
1378 skb->len);
1379 } else {
1380 struct bond_up_slave *slaves;
1381 unsigned int count;
1382
1383 slaves = rcu_dereference(bond->slave_arr);
1384 count = slaves ? READ_ONCE(slaves->count) : 0;
1385 if (likely(count))
1386 tx_slave = slaves->arr[hash_index %
1387 count];
1388 }
1389 break;
1390 }
1391 }
1392 return bond_do_alb_xmit(skb, bond, tx_slave);
1393}
1394
1395int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev)
1396{
1397 struct bonding *bond = netdev_priv(bond_dev);
1398 struct ethhdr *eth_data;
1399 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
1400 struct slave *tx_slave = NULL;
1401 static const __be32 ip_bcast = htonl(0xffffffff);
1402 int hash_size = 0;
1403 bool do_tx_balance = true;
1404 u32 hash_index = 0;
1405 const u8 *hash_start = NULL;
1406 struct ipv6hdr *ip6hdr;
1407
1408 skb_reset_mac_header(skb);
1409 eth_data = eth_hdr(skb);
1410
1411 switch (ntohs(skb->protocol)) {
1412 case ETH_P_IP: {
1413 const struct iphdr *iph = ip_hdr(skb);
1414
1415 if (ether_addr_equal_64bits(eth_data->h_dest, mac_bcast) ||
1416 (iph->daddr == ip_bcast) ||
1417 (iph->protocol == IPPROTO_IGMP)) {
1418 do_tx_balance = false;
1419 break;
1420 }
1421 hash_start = (char *)&(iph->daddr);
1422 hash_size = sizeof(iph->daddr);
1423 }
1424 break;
1425 case ETH_P_IPV6:
1426
1427
1428
1429 if (ether_addr_equal_64bits(eth_data->h_dest, mac_bcast)) {
1430 do_tx_balance = false;
1431 break;
1432 }
1433
1434
1435
1436
1437 if (ether_addr_equal_64bits(eth_data->h_dest, mac_v6_allmcast)) {
1438 do_tx_balance = false;
1439 break;
1440 }
1441
1442
1443
1444
1445
1446 ip6hdr = ipv6_hdr(skb);
1447 if (ipv6_addr_any(&ip6hdr->saddr)) {
1448 do_tx_balance = false;
1449 break;
1450 }
1451
1452 hash_start = (char *)&(ipv6_hdr(skb)->daddr);
1453 hash_size = sizeof(ipv6_hdr(skb)->daddr);
1454 break;
1455 case ETH_P_IPX:
1456 if (ipx_hdr(skb)->ipx_checksum != IPX_NO_CHECKSUM) {
1457
1458 do_tx_balance = false;
1459 break;
1460 }
1461
1462 if (ipx_hdr(skb)->ipx_type != IPX_TYPE_NCP) {
1463
1464
1465
1466
1467 do_tx_balance = false;
1468 break;
1469 }
1470
1471 hash_start = (char *)eth_data->h_dest;
1472 hash_size = ETH_ALEN;
1473 break;
1474 case ETH_P_ARP:
1475 do_tx_balance = false;
1476 if (bond_info->rlb_enabled)
1477 tx_slave = rlb_arp_xmit(skb, bond);
1478 break;
1479 default:
1480 do_tx_balance = false;
1481 break;
1482 }
1483
1484 if (do_tx_balance) {
1485 hash_index = _simple_hash(hash_start, hash_size);
1486 tx_slave = tlb_choose_channel(bond, hash_index, skb->len);
1487 }
1488
1489 return bond_do_alb_xmit(skb, bond, tx_slave);
1490}
1491
1492void bond_alb_monitor(struct work_struct *work)
1493{
1494 struct bonding *bond = container_of(work, struct bonding,
1495 alb_work.work);
1496 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
1497 struct list_head *iter;
1498 struct slave *slave;
1499
1500 if (!bond_has_slaves(bond)) {
1501 bond_info->tx_rebalance_counter = 0;
1502 bond_info->lp_counter = 0;
1503 goto re_arm;
1504 }
1505
1506 rcu_read_lock();
1507
1508 bond_info->tx_rebalance_counter++;
1509 bond_info->lp_counter++;
1510
1511
1512 if (bond_info->lp_counter >= BOND_ALB_LP_TICKS(bond)) {
1513 bool strict_match;
1514
1515 bond_for_each_slave_rcu(bond, slave, iter) {
1516
1517
1518
1519
1520
1521 strict_match = (slave != rcu_access_pointer(bond->curr_active_slave) ||
1522 bond_info->rlb_enabled);
1523 alb_send_learning_packets(slave, slave->dev->dev_addr,
1524 strict_match);
1525 }
1526 bond_info->lp_counter = 0;
1527 }
1528
1529
1530 if (bond_info->tx_rebalance_counter >= BOND_TLB_REBALANCE_TICKS) {
1531 bond_for_each_slave_rcu(bond, slave, iter) {
1532 tlb_clear_slave(bond, slave, 1);
1533 if (slave == rcu_access_pointer(bond->curr_active_slave)) {
1534 SLAVE_TLB_INFO(slave).load =
1535 bond_info->unbalanced_load /
1536 BOND_TLB_REBALANCE_INTERVAL;
1537 bond_info->unbalanced_load = 0;
1538 }
1539 }
1540 bond_info->tx_rebalance_counter = 0;
1541 }
1542
1543 if (bond_info->rlb_enabled) {
1544 if (bond_info->primary_is_promisc &&
1545 (++bond_info->rlb_promisc_timeout_counter >= RLB_PROMISC_TIMEOUT)) {
1546
1547
1548
1549
1550 rcu_read_unlock();
1551 if (!rtnl_trylock())
1552 goto re_arm;
1553
1554 bond_info->rlb_promisc_timeout_counter = 0;
1555
1556
1557
1558
1559
1560 dev_set_promiscuity(rtnl_dereference(bond->curr_active_slave)->dev,
1561 -1);
1562 bond_info->primary_is_promisc = 0;
1563
1564 rtnl_unlock();
1565 rcu_read_lock();
1566 }
1567
1568 if (bond_info->rlb_rebalance) {
1569 bond_info->rlb_rebalance = 0;
1570 rlb_rebalance(bond);
1571 }
1572
1573
1574 if (bond_info->rx_ntt) {
1575 if (bond_info->rlb_update_delay_counter) {
1576 --bond_info->rlb_update_delay_counter;
1577 } else {
1578 rlb_update_rx_clients(bond);
1579 if (bond_info->rlb_update_retry_counter)
1580 --bond_info->rlb_update_retry_counter;
1581 else
1582 bond_info->rx_ntt = 0;
1583 }
1584 }
1585 }
1586 rcu_read_unlock();
1587re_arm:
1588 queue_delayed_work(bond->wq, &bond->alb_work, alb_delta_in_ticks);
1589}
1590
1591
1592
1593
1594int bond_alb_init_slave(struct bonding *bond, struct slave *slave)
1595{
1596 int res;
1597
1598 res = alb_set_slave_mac_addr(slave, slave->perm_hwaddr,
1599 slave->dev->addr_len);
1600 if (res)
1601 return res;
1602
1603 res = alb_handle_addr_collision_on_attach(bond, slave);
1604 if (res)
1605 return res;
1606
1607 tlb_init_slave(slave);
1608
1609
1610 bond->alb_info.tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS;
1611
1612 if (bond->alb_info.rlb_enabled)
1613 bond->alb_info.rlb_rebalance = 1;
1614
1615 return 0;
1616}
1617
1618
1619
1620
1621
1622
1623void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave)
1624{
1625 if (bond_has_slaves(bond))
1626 alb_change_hw_addr_on_detach(bond, slave);
1627
1628 tlb_clear_slave(bond, slave, 0);
1629
1630 if (bond->alb_info.rlb_enabled) {
1631 bond->alb_info.rx_slave = NULL;
1632 rlb_clear_slave(bond, slave);
1633 }
1634
1635}
1636
1637void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link)
1638{
1639 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
1640
1641 if (link == BOND_LINK_DOWN) {
1642 tlb_clear_slave(bond, slave, 0);
1643 if (bond->alb_info.rlb_enabled)
1644 rlb_clear_slave(bond, slave);
1645 } else if (link == BOND_LINK_UP) {
1646
1647 bond_info->tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS;
1648 if (bond->alb_info.rlb_enabled) {
1649 bond->alb_info.rlb_rebalance = 1;
1650
1651
1652
1653
1654
1655 }
1656 }
1657
1658 if (bond_is_nondyn_tlb(bond)) {
1659 if (bond_update_slave_arr(bond, NULL))
1660 pr_err("Failed to build slave-array for TLB mode.\n");
1661 }
1662}
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave)
1675{
1676 struct slave *swap_slave;
1677 struct slave *curr_active;
1678
1679 curr_active = rtnl_dereference(bond->curr_active_slave);
1680 if (curr_active == new_slave)
1681 return;
1682
1683 if (curr_active && bond->alb_info.primary_is_promisc) {
1684 dev_set_promiscuity(curr_active->dev, -1);
1685 bond->alb_info.primary_is_promisc = 0;
1686 bond->alb_info.rlb_promisc_timeout_counter = 0;
1687 }
1688
1689 swap_slave = curr_active;
1690 rcu_assign_pointer(bond->curr_active_slave, new_slave);
1691
1692 if (!new_slave || !bond_has_slaves(bond))
1693 return;
1694
1695
1696
1697
1698 if (!swap_slave)
1699 swap_slave = bond_slave_has_mac(bond, bond->dev->dev_addr);
1700
1701
1702
1703
1704
1705 if (swap_slave)
1706 tlb_clear_slave(bond, swap_slave, 1);
1707 tlb_clear_slave(bond, new_slave, 1);
1708
1709
1710
1711
1712 if (BOND_MODE(bond) == BOND_MODE_TLB) {
1713 struct sockaddr_storage ss;
1714 u8 tmp_addr[MAX_ADDR_LEN];
1715
1716 bond_hw_addr_copy(tmp_addr, new_slave->dev->dev_addr,
1717 new_slave->dev->addr_len);
1718
1719 bond_hw_addr_copy(ss.__data, bond->dev->dev_addr,
1720 bond->dev->addr_len);
1721 ss.ss_family = bond->dev->type;
1722
1723 dev_set_mac_address(new_slave->dev, (struct sockaddr *)&ss);
1724
1725 bond_hw_addr_copy(new_slave->dev->dev_addr, tmp_addr,
1726 new_slave->dev->addr_len);
1727 }
1728
1729
1730 if (swap_slave) {
1731
1732 alb_swap_mac_addr(swap_slave, new_slave);
1733 alb_fasten_mac_swap(bond, swap_slave, new_slave);
1734 } else {
1735
1736 alb_set_slave_mac_addr(new_slave, bond->dev->dev_addr,
1737 bond->dev->addr_len);
1738 alb_send_learning_packets(new_slave, bond->dev->dev_addr,
1739 false);
1740 }
1741}
1742
1743
1744int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr)
1745{
1746 struct bonding *bond = netdev_priv(bond_dev);
1747 struct sockaddr_storage *ss = addr;
1748 struct slave *curr_active;
1749 struct slave *swap_slave;
1750 int res;
1751
1752 if (!is_valid_ether_addr(ss->__data))
1753 return -EADDRNOTAVAIL;
1754
1755 res = alb_set_mac_address(bond, addr);
1756 if (res)
1757 return res;
1758
1759 bond_hw_addr_copy(bond_dev->dev_addr, ss->__data, bond_dev->addr_len);
1760
1761
1762
1763
1764
1765 curr_active = rtnl_dereference(bond->curr_active_slave);
1766 if (!curr_active)
1767 return 0;
1768
1769 swap_slave = bond_slave_has_mac(bond, bond_dev->dev_addr);
1770
1771 if (swap_slave) {
1772 alb_swap_mac_addr(swap_slave, curr_active);
1773 alb_fasten_mac_swap(bond, swap_slave, curr_active);
1774 } else {
1775 alb_set_slave_mac_addr(curr_active, bond_dev->dev_addr,
1776 bond_dev->addr_len);
1777
1778 alb_send_learning_packets(curr_active,
1779 bond_dev->dev_addr, false);
1780 if (bond->alb_info.rlb_enabled) {
1781
1782 rlb_req_update_slave_clients(bond, curr_active);
1783 }
1784 }
1785
1786 return 0;
1787}
1788
1789void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id)
1790{
1791 if (bond->alb_info.rlb_enabled)
1792 rlb_clear_vlan(bond, vlan_id);
1793}
1794
1795