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22
23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
25#include <linux/skbuff.h>
26#include <linux/netdevice.h>
27#include <linux/etherdevice.h>
28#include <linux/pkt_sched.h>
29#include <linux/spinlock.h>
30#include <linux/slab.h>
31#include <linux/timer.h>
32#include <linux/ip.h>
33#include <linux/ipv6.h>
34#include <linux/if_arp.h>
35#include <linux/if_ether.h>
36#include <linux/if_bonding.h>
37#include <linux/if_vlan.h>
38#include <linux/in.h>
39#include <net/ipx.h>
40#include <net/arp.h>
41#include <net/ipv6.h>
42#include <asm/byteorder.h>
43#include "bonding.h"
44#include "bond_alb.h"
45
46
47
48#ifndef __long_aligned
49#define __long_aligned __attribute__((aligned((sizeof(long)))))
50#endif
51static const u8 mac_bcast[ETH_ALEN] __long_aligned = {
52 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
53};
54static const u8 mac_v6_allmcast[ETH_ALEN] __long_aligned = {
55 0x33, 0x33, 0x00, 0x00, 0x00, 0x01
56};
57static const int alb_delta_in_ticks = HZ / ALB_TIMER_TICKS_PER_SEC;
58
59#pragma pack(1)
60struct learning_pkt {
61 u8 mac_dst[ETH_ALEN];
62 u8 mac_src[ETH_ALEN];
63 __be16 type;
64 u8 padding[ETH_ZLEN - ETH_HLEN];
65};
66
67struct arp_pkt {
68 __be16 hw_addr_space;
69 __be16 prot_addr_space;
70 u8 hw_addr_len;
71 u8 prot_addr_len;
72 __be16 op_code;
73 u8 mac_src[ETH_ALEN];
74 __be32 ip_src;
75 u8 mac_dst[ETH_ALEN];
76 __be32 ip_dst;
77};
78#pragma pack()
79
80static inline struct arp_pkt *arp_pkt(const struct sk_buff *skb)
81{
82 return (struct arp_pkt *)skb_network_header(skb);
83}
84
85
86static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[]);
87static void rlb_purge_src_ip(struct bonding *bond, struct arp_pkt *arp);
88static void rlb_src_unlink(struct bonding *bond, u32 index);
89static void rlb_src_link(struct bonding *bond, u32 ip_src_hash,
90 u32 ip_dst_hash);
91
92static inline u8 _simple_hash(const u8 *hash_start, int hash_size)
93{
94 int i;
95 u8 hash = 0;
96
97 for (i = 0; i < hash_size; i++) {
98 hash ^= hash_start[i];
99 }
100
101 return hash;
102}
103
104
105
106static inline void _lock_tx_hashtbl_bh(struct bonding *bond)
107{
108 spin_lock_bh(&(BOND_ALB_INFO(bond).tx_hashtbl_lock));
109}
110
111static inline void _unlock_tx_hashtbl_bh(struct bonding *bond)
112{
113 spin_unlock_bh(&(BOND_ALB_INFO(bond).tx_hashtbl_lock));
114}
115
116static inline void _lock_tx_hashtbl(struct bonding *bond)
117{
118 spin_lock(&(BOND_ALB_INFO(bond).tx_hashtbl_lock));
119}
120
121static inline void _unlock_tx_hashtbl(struct bonding *bond)
122{
123 spin_unlock(&(BOND_ALB_INFO(bond).tx_hashtbl_lock));
124}
125
126
127static inline void tlb_init_table_entry(struct tlb_client_info *entry, int save_load)
128{
129 if (save_load) {
130 entry->load_history = 1 + entry->tx_bytes /
131 BOND_TLB_REBALANCE_INTERVAL;
132 entry->tx_bytes = 0;
133 }
134
135 entry->tx_slave = NULL;
136 entry->next = TLB_NULL_INDEX;
137 entry->prev = TLB_NULL_INDEX;
138}
139
140static inline void tlb_init_slave(struct slave *slave)
141{
142 SLAVE_TLB_INFO(slave).load = 0;
143 SLAVE_TLB_INFO(slave).head = TLB_NULL_INDEX;
144}
145
146
147static void __tlb_clear_slave(struct bonding *bond, struct slave *slave,
148 int save_load)
149{
150 struct tlb_client_info *tx_hash_table;
151 u32 index;
152
153
154 tx_hash_table = BOND_ALB_INFO(bond).tx_hashtbl;
155
156
157 if (tx_hash_table) {
158 index = SLAVE_TLB_INFO(slave).head;
159 while (index != TLB_NULL_INDEX) {
160 u32 next_index = tx_hash_table[index].next;
161 tlb_init_table_entry(&tx_hash_table[index], save_load);
162 index = next_index;
163 }
164 }
165
166 tlb_init_slave(slave);
167}
168
169
170static void tlb_clear_slave(struct bonding *bond, struct slave *slave,
171 int save_load)
172{
173 _lock_tx_hashtbl_bh(bond);
174 __tlb_clear_slave(bond, slave, save_load);
175 _unlock_tx_hashtbl_bh(bond);
176}
177
178
179static int tlb_initialize(struct bonding *bond)
180{
181 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
182 int size = TLB_HASH_TABLE_SIZE * sizeof(struct tlb_client_info);
183 struct tlb_client_info *new_hashtbl;
184 int i;
185
186 new_hashtbl = kzalloc(size, GFP_KERNEL);
187 if (!new_hashtbl)
188 return -1;
189
190 _lock_tx_hashtbl_bh(bond);
191
192 bond_info->tx_hashtbl = new_hashtbl;
193
194 for (i = 0; i < TLB_HASH_TABLE_SIZE; i++) {
195 tlb_init_table_entry(&bond_info->tx_hashtbl[i], 0);
196 }
197
198 _unlock_tx_hashtbl_bh(bond);
199
200 return 0;
201}
202
203
204static void tlb_deinitialize(struct bonding *bond)
205{
206 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
207
208 _lock_tx_hashtbl_bh(bond);
209
210 kfree(bond_info->tx_hashtbl);
211 bond_info->tx_hashtbl = NULL;
212
213 _unlock_tx_hashtbl_bh(bond);
214}
215
216static long long compute_gap(struct slave *slave)
217{
218 return (s64) (slave->speed << 20) -
219 (s64) (SLAVE_TLB_INFO(slave).load << 3);
220}
221
222
223static struct slave *tlb_get_least_loaded_slave(struct bonding *bond)
224{
225 struct slave *slave, *least_loaded;
226 long long max_gap;
227 int i;
228
229 least_loaded = NULL;
230 max_gap = LLONG_MIN;
231
232
233 bond_for_each_slave(bond, slave, i) {
234 if (SLAVE_IS_OK(slave)) {
235 long long gap = compute_gap(slave);
236
237 if (max_gap < gap) {
238 least_loaded = slave;
239 max_gap = gap;
240 }
241 }
242 }
243
244 return least_loaded;
245}
246
247static struct slave *__tlb_choose_channel(struct bonding *bond, u32 hash_index,
248 u32 skb_len)
249{
250 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
251 struct tlb_client_info *hash_table;
252 struct slave *assigned_slave;
253
254 hash_table = bond_info->tx_hashtbl;
255 assigned_slave = hash_table[hash_index].tx_slave;
256 if (!assigned_slave) {
257 assigned_slave = tlb_get_least_loaded_slave(bond);
258
259 if (assigned_slave) {
260 struct tlb_slave_info *slave_info =
261 &(SLAVE_TLB_INFO(assigned_slave));
262 u32 next_index = slave_info->head;
263
264 hash_table[hash_index].tx_slave = assigned_slave;
265 hash_table[hash_index].next = next_index;
266 hash_table[hash_index].prev = TLB_NULL_INDEX;
267
268 if (next_index != TLB_NULL_INDEX) {
269 hash_table[next_index].prev = hash_index;
270 }
271
272 slave_info->head = hash_index;
273 slave_info->load +=
274 hash_table[hash_index].load_history;
275 }
276 }
277
278 if (assigned_slave) {
279 hash_table[hash_index].tx_bytes += skb_len;
280 }
281
282 return assigned_slave;
283}
284
285
286static struct slave *tlb_choose_channel(struct bonding *bond, u32 hash_index,
287 u32 skb_len)
288{
289 struct slave *tx_slave;
290
291
292
293
294
295 _lock_tx_hashtbl(bond);
296 tx_slave = __tlb_choose_channel(bond, hash_index, skb_len);
297 _unlock_tx_hashtbl(bond);
298 return tx_slave;
299}
300
301
302static inline void _lock_rx_hashtbl_bh(struct bonding *bond)
303{
304 spin_lock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
305}
306
307static inline void _unlock_rx_hashtbl_bh(struct bonding *bond)
308{
309 spin_unlock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
310}
311
312static inline void _lock_rx_hashtbl(struct bonding *bond)
313{
314 spin_lock(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
315}
316
317static inline void _unlock_rx_hashtbl(struct bonding *bond)
318{
319 spin_unlock(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
320}
321
322
323
324
325static void rlb_update_entry_from_arp(struct bonding *bond, struct arp_pkt *arp)
326{
327 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
328 struct rlb_client_info *client_info;
329 u32 hash_index;
330
331 _lock_rx_hashtbl_bh(bond);
332
333 hash_index = _simple_hash((u8*)&(arp->ip_src), sizeof(arp->ip_src));
334 client_info = &(bond_info->rx_hashtbl[hash_index]);
335
336 if ((client_info->assigned) &&
337 (client_info->ip_src == arp->ip_dst) &&
338 (client_info->ip_dst == arp->ip_src) &&
339 (!ether_addr_equal_64bits(client_info->mac_dst, arp->mac_src))) {
340
341 memcpy(client_info->mac_dst, arp->mac_src, ETH_ALEN);
342 client_info->ntt = 1;
343 bond_info->rx_ntt = 1;
344 }
345
346 _unlock_rx_hashtbl_bh(bond);
347}
348
349static int rlb_arp_recv(const struct sk_buff *skb, struct bonding *bond,
350 struct slave *slave)
351{
352 struct arp_pkt *arp, _arp;
353
354 if (skb->protocol != cpu_to_be16(ETH_P_ARP))
355 goto out;
356
357 arp = skb_header_pointer(skb, 0, sizeof(_arp), &_arp);
358 if (!arp)
359 goto out;
360
361
362
363
364
365
366
367
368
369
370
371 rlb_purge_src_ip(bond, arp);
372
373 if (arp->op_code == htons(ARPOP_REPLY)) {
374
375 rlb_update_entry_from_arp(bond, arp);
376 pr_debug("Server received an ARP Reply from client\n");
377 }
378out:
379 return RX_HANDLER_ANOTHER;
380}
381
382
383static struct slave *rlb_next_rx_slave(struct bonding *bond)
384{
385 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
386 struct slave *rx_slave, *slave, *start_at;
387 int i = 0;
388
389 if (bond_info->next_rx_slave) {
390 start_at = bond_info->next_rx_slave;
391 } else {
392 start_at = bond->first_slave;
393 }
394
395 rx_slave = NULL;
396
397 bond_for_each_slave_from(bond, slave, i, start_at) {
398 if (SLAVE_IS_OK(slave)) {
399 if (!rx_slave) {
400 rx_slave = slave;
401 } else if (slave->speed > rx_slave->speed) {
402 rx_slave = slave;
403 }
404 }
405 }
406
407 if (rx_slave) {
408 bond_info->next_rx_slave = rx_slave->next;
409 }
410
411 return rx_slave;
412}
413
414
415
416
417
418
419static void rlb_teach_disabled_mac_on_primary(struct bonding *bond, u8 addr[])
420{
421 if (!bond->curr_active_slave) {
422 return;
423 }
424
425 if (!bond->alb_info.primary_is_promisc) {
426 if (!dev_set_promiscuity(bond->curr_active_slave->dev, 1))
427 bond->alb_info.primary_is_promisc = 1;
428 else
429 bond->alb_info.primary_is_promisc = 0;
430 }
431
432 bond->alb_info.rlb_promisc_timeout_counter = 0;
433
434 alb_send_learning_packets(bond->curr_active_slave, addr);
435}
436
437
438
439
440
441static void rlb_clear_slave(struct bonding *bond, struct slave *slave)
442{
443 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
444 struct rlb_client_info *rx_hash_table;
445 u32 index, next_index;
446
447
448 _lock_rx_hashtbl_bh(bond);
449
450 rx_hash_table = bond_info->rx_hashtbl;
451 index = bond_info->rx_hashtbl_used_head;
452 for (; index != RLB_NULL_INDEX; index = next_index) {
453 next_index = rx_hash_table[index].used_next;
454 if (rx_hash_table[index].slave == slave) {
455 struct slave *assigned_slave = rlb_next_rx_slave(bond);
456
457 if (assigned_slave) {
458 rx_hash_table[index].slave = assigned_slave;
459 if (!ether_addr_equal_64bits(rx_hash_table[index].mac_dst,
460 mac_bcast)) {
461 bond_info->rx_hashtbl[index].ntt = 1;
462 bond_info->rx_ntt = 1;
463
464
465
466
467
468
469
470 bond_info->rlb_update_retry_counter =
471 RLB_UPDATE_RETRY;
472 }
473 } else {
474 rx_hash_table[index].slave = NULL;
475 }
476 }
477 }
478
479 _unlock_rx_hashtbl_bh(bond);
480
481 write_lock_bh(&bond->curr_slave_lock);
482
483 if (slave != bond->curr_active_slave) {
484 rlb_teach_disabled_mac_on_primary(bond, slave->dev->dev_addr);
485 }
486
487 write_unlock_bh(&bond->curr_slave_lock);
488}
489
490static void rlb_update_client(struct rlb_client_info *client_info)
491{
492 int i;
493
494 if (!client_info->slave) {
495 return;
496 }
497
498 for (i = 0; i < RLB_ARP_BURST_SIZE; i++) {
499 struct sk_buff *skb;
500
501 skb = arp_create(ARPOP_REPLY, ETH_P_ARP,
502 client_info->ip_dst,
503 client_info->slave->dev,
504 client_info->ip_src,
505 client_info->mac_dst,
506 client_info->slave->dev->dev_addr,
507 client_info->mac_dst);
508 if (!skb) {
509 pr_err("%s: Error: failed to create an ARP packet\n",
510 client_info->slave->bond->dev->name);
511 continue;
512 }
513
514 skb->dev = client_info->slave->dev;
515
516 if (client_info->tag) {
517 skb = vlan_put_tag(skb, htons(ETH_P_8021Q), client_info->vlan_id);
518 if (!skb) {
519 pr_err("%s: Error: failed to insert VLAN tag\n",
520 client_info->slave->bond->dev->name);
521 continue;
522 }
523 }
524
525 arp_xmit(skb);
526 }
527}
528
529
530static void rlb_update_rx_clients(struct bonding *bond)
531{
532 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
533 struct rlb_client_info *client_info;
534 u32 hash_index;
535
536 _lock_rx_hashtbl_bh(bond);
537
538 hash_index = bond_info->rx_hashtbl_used_head;
539 for (; hash_index != RLB_NULL_INDEX;
540 hash_index = client_info->used_next) {
541 client_info = &(bond_info->rx_hashtbl[hash_index]);
542 if (client_info->ntt) {
543 rlb_update_client(client_info);
544 if (bond_info->rlb_update_retry_counter == 0) {
545 client_info->ntt = 0;
546 }
547 }
548 }
549
550
551
552
553 bond_info->rlb_update_delay_counter = RLB_UPDATE_DELAY;
554
555 _unlock_rx_hashtbl_bh(bond);
556}
557
558
559static void rlb_req_update_slave_clients(struct bonding *bond, struct slave *slave)
560{
561 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
562 struct rlb_client_info *client_info;
563 int ntt = 0;
564 u32 hash_index;
565
566 _lock_rx_hashtbl_bh(bond);
567
568 hash_index = bond_info->rx_hashtbl_used_head;
569 for (; hash_index != RLB_NULL_INDEX;
570 hash_index = client_info->used_next) {
571 client_info = &(bond_info->rx_hashtbl[hash_index]);
572
573 if ((client_info->slave == slave) &&
574 !ether_addr_equal_64bits(client_info->mac_dst, mac_bcast)) {
575 client_info->ntt = 1;
576 ntt = 1;
577 }
578 }
579
580
581 if (ntt) {
582 bond_info->rx_ntt = 1;
583
584 bond_info->rlb_update_retry_counter = RLB_UPDATE_RETRY;
585 }
586
587 _unlock_rx_hashtbl_bh(bond);
588}
589
590
591static void rlb_req_update_subnet_clients(struct bonding *bond, __be32 src_ip)
592{
593 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
594 struct rlb_client_info *client_info;
595 u32 hash_index;
596
597 _lock_rx_hashtbl(bond);
598
599 hash_index = bond_info->rx_hashtbl_used_head;
600 for (; hash_index != RLB_NULL_INDEX;
601 hash_index = client_info->used_next) {
602 client_info = &(bond_info->rx_hashtbl[hash_index]);
603
604 if (!client_info->slave) {
605 pr_err("%s: Error: found a client with no channel in the client's hash table\n",
606 bond->dev->name);
607 continue;
608 }
609
610
611
612
613 if ((client_info->ip_src == src_ip) &&
614 !ether_addr_equal_64bits(client_info->slave->dev->dev_addr,
615 bond->dev->dev_addr) &&
616 !ether_addr_equal_64bits(client_info->mac_dst, mac_bcast)) {
617 client_info->ntt = 1;
618 bond_info->rx_ntt = 1;
619 }
620 }
621
622 _unlock_rx_hashtbl(bond);
623}
624
625
626static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bond)
627{
628 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
629 struct arp_pkt *arp = arp_pkt(skb);
630 struct slave *assigned_slave;
631 struct rlb_client_info *client_info;
632 u32 hash_index = 0;
633
634 _lock_rx_hashtbl(bond);
635
636 hash_index = _simple_hash((u8 *)&arp->ip_dst, sizeof(arp->ip_dst));
637 client_info = &(bond_info->rx_hashtbl[hash_index]);
638
639 if (client_info->assigned) {
640 if ((client_info->ip_src == arp->ip_src) &&
641 (client_info->ip_dst == arp->ip_dst)) {
642
643 if (!ether_addr_equal_64bits(arp->mac_dst, mac_bcast)) {
644
645 memcpy(client_info->mac_dst, arp->mac_dst, ETH_ALEN);
646 }
647 memcpy(client_info->mac_src, arp->mac_src, ETH_ALEN);
648
649 assigned_slave = client_info->slave;
650 if (assigned_slave) {
651 _unlock_rx_hashtbl(bond);
652 return assigned_slave;
653 }
654 } else {
655
656
657
658
659 if (bond->curr_active_slave &&
660 client_info->slave != bond->curr_active_slave) {
661 client_info->slave = bond->curr_active_slave;
662 rlb_update_client(client_info);
663 }
664 }
665 }
666
667 assigned_slave = rlb_next_rx_slave(bond);
668
669 if (assigned_slave) {
670 if (!(client_info->assigned &&
671 client_info->ip_src == arp->ip_src)) {
672
673
674
675 u32 hash_src = _simple_hash((u8 *)&arp->ip_src,
676 sizeof(arp->ip_src));
677 rlb_src_unlink(bond, hash_index);
678 rlb_src_link(bond, hash_src, hash_index);
679 }
680
681 client_info->ip_src = arp->ip_src;
682 client_info->ip_dst = arp->ip_dst;
683
684
685
686
687 memcpy(client_info->mac_dst, arp->mac_dst, ETH_ALEN);
688 memcpy(client_info->mac_src, arp->mac_src, ETH_ALEN);
689 client_info->slave = assigned_slave;
690
691 if (!ether_addr_equal_64bits(client_info->mac_dst, mac_bcast)) {
692 client_info->ntt = 1;
693 bond->alb_info.rx_ntt = 1;
694 } else {
695 client_info->ntt = 0;
696 }
697
698 if (bond_vlan_used(bond)) {
699 if (!vlan_get_tag(skb, &client_info->vlan_id))
700 client_info->tag = 1;
701 }
702
703 if (!client_info->assigned) {
704 u32 prev_tbl_head = bond_info->rx_hashtbl_used_head;
705 bond_info->rx_hashtbl_used_head = hash_index;
706 client_info->used_next = prev_tbl_head;
707 if (prev_tbl_head != RLB_NULL_INDEX) {
708 bond_info->rx_hashtbl[prev_tbl_head].used_prev =
709 hash_index;
710 }
711 client_info->assigned = 1;
712 }
713 }
714
715 _unlock_rx_hashtbl(bond);
716
717 return assigned_slave;
718}
719
720
721
722
723
724static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond)
725{
726 struct arp_pkt *arp = arp_pkt(skb);
727 struct slave *tx_slave = NULL;
728
729
730
731
732 if (!bond_slave_has_mac(bond, arp->mac_src))
733 return NULL;
734
735 if (arp->op_code == htons(ARPOP_REPLY)) {
736
737
738
739 tx_slave = rlb_choose_channel(skb, bond);
740 if (tx_slave) {
741 memcpy(arp->mac_src,tx_slave->dev->dev_addr, ETH_ALEN);
742 }
743 pr_debug("Server sent ARP Reply packet\n");
744 } else if (arp->op_code == htons(ARPOP_REQUEST)) {
745
746
747
748
749
750 rlb_choose_channel(skb, bond);
751
752
753
754
755 bond->alb_info.rlb_update_delay_counter = RLB_UPDATE_DELAY;
756
757
758
759
760
761
762 rlb_req_update_subnet_clients(bond, arp->ip_src);
763 pr_debug("Server sent ARP Request packet\n");
764 }
765
766 return tx_slave;
767}
768
769
770static void rlb_rebalance(struct bonding *bond)
771{
772 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
773 struct slave *assigned_slave;
774 struct rlb_client_info *client_info;
775 int ntt;
776 u32 hash_index;
777
778 _lock_rx_hashtbl_bh(bond);
779
780 ntt = 0;
781 hash_index = bond_info->rx_hashtbl_used_head;
782 for (; hash_index != RLB_NULL_INDEX;
783 hash_index = client_info->used_next) {
784 client_info = &(bond_info->rx_hashtbl[hash_index]);
785 assigned_slave = rlb_next_rx_slave(bond);
786 if (assigned_slave && (client_info->slave != assigned_slave)) {
787 client_info->slave = assigned_slave;
788 client_info->ntt = 1;
789 ntt = 1;
790 }
791 }
792
793
794 if (ntt) {
795 bond_info->rx_ntt = 1;
796 }
797 _unlock_rx_hashtbl_bh(bond);
798}
799
800
801static void rlb_init_table_entry_dst(struct rlb_client_info *entry)
802{
803 entry->used_next = RLB_NULL_INDEX;
804 entry->used_prev = RLB_NULL_INDEX;
805 entry->assigned = 0;
806 entry->slave = NULL;
807 entry->tag = 0;
808}
809static void rlb_init_table_entry_src(struct rlb_client_info *entry)
810{
811 entry->src_first = RLB_NULL_INDEX;
812 entry->src_prev = RLB_NULL_INDEX;
813 entry->src_next = RLB_NULL_INDEX;
814}
815
816static void rlb_init_table_entry(struct rlb_client_info *entry)
817{
818 memset(entry, 0, sizeof(struct rlb_client_info));
819 rlb_init_table_entry_dst(entry);
820 rlb_init_table_entry_src(entry);
821}
822
823static void rlb_delete_table_entry_dst(struct bonding *bond, u32 index)
824{
825 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
826 u32 next_index = bond_info->rx_hashtbl[index].used_next;
827 u32 prev_index = bond_info->rx_hashtbl[index].used_prev;
828
829 if (index == bond_info->rx_hashtbl_used_head)
830 bond_info->rx_hashtbl_used_head = next_index;
831 if (prev_index != RLB_NULL_INDEX)
832 bond_info->rx_hashtbl[prev_index].used_next = next_index;
833 if (next_index != RLB_NULL_INDEX)
834 bond_info->rx_hashtbl[next_index].used_prev = prev_index;
835}
836
837
838static void rlb_src_unlink(struct bonding *bond, u32 index)
839{
840 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
841 u32 next_index = bond_info->rx_hashtbl[index].src_next;
842 u32 prev_index = bond_info->rx_hashtbl[index].src_prev;
843
844 bond_info->rx_hashtbl[index].src_next = RLB_NULL_INDEX;
845 bond_info->rx_hashtbl[index].src_prev = RLB_NULL_INDEX;
846
847 if (next_index != RLB_NULL_INDEX)
848 bond_info->rx_hashtbl[next_index].src_prev = prev_index;
849
850 if (prev_index == RLB_NULL_INDEX)
851 return;
852
853
854 if (bond_info->rx_hashtbl[prev_index].src_first == index)
855 bond_info->rx_hashtbl[prev_index].src_first = next_index;
856 else
857 bond_info->rx_hashtbl[prev_index].src_next = next_index;
858
859}
860
861static void rlb_delete_table_entry(struct bonding *bond, u32 index)
862{
863 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
864 struct rlb_client_info *entry = &(bond_info->rx_hashtbl[index]);
865
866 rlb_delete_table_entry_dst(bond, index);
867 rlb_init_table_entry_dst(entry);
868
869 rlb_src_unlink(bond, index);
870}
871
872
873
874
875static void rlb_src_link(struct bonding *bond, u32 ip_src_hash, u32 ip_dst_hash)
876{
877 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
878 u32 next;
879
880 bond_info->rx_hashtbl[ip_dst_hash].src_prev = ip_src_hash;
881 next = bond_info->rx_hashtbl[ip_src_hash].src_first;
882 bond_info->rx_hashtbl[ip_dst_hash].src_next = next;
883 if (next != RLB_NULL_INDEX)
884 bond_info->rx_hashtbl[next].src_prev = ip_dst_hash;
885 bond_info->rx_hashtbl[ip_src_hash].src_first = ip_dst_hash;
886}
887
888
889
890static void rlb_purge_src_ip(struct bonding *bond, struct arp_pkt *arp)
891{
892 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
893 u32 ip_src_hash = _simple_hash((u8*)&(arp->ip_src), sizeof(arp->ip_src));
894 u32 index;
895
896 _lock_rx_hashtbl_bh(bond);
897
898 index = bond_info->rx_hashtbl[ip_src_hash].src_first;
899 while (index != RLB_NULL_INDEX) {
900 struct rlb_client_info *entry = &(bond_info->rx_hashtbl[index]);
901 u32 next_index = entry->src_next;
902 if (entry->ip_src == arp->ip_src &&
903 !ether_addr_equal_64bits(arp->mac_src, entry->mac_src))
904 rlb_delete_table_entry(bond, index);
905 index = next_index;
906 }
907 _unlock_rx_hashtbl_bh(bond);
908}
909
910static int rlb_initialize(struct bonding *bond)
911{
912 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
913 struct rlb_client_info *new_hashtbl;
914 int size = RLB_HASH_TABLE_SIZE * sizeof(struct rlb_client_info);
915 int i;
916
917 new_hashtbl = kmalloc(size, GFP_KERNEL);
918 if (!new_hashtbl)
919 return -1;
920
921 _lock_rx_hashtbl_bh(bond);
922
923 bond_info->rx_hashtbl = new_hashtbl;
924
925 bond_info->rx_hashtbl_used_head = RLB_NULL_INDEX;
926
927 for (i = 0; i < RLB_HASH_TABLE_SIZE; i++) {
928 rlb_init_table_entry(bond_info->rx_hashtbl + i);
929 }
930
931 _unlock_rx_hashtbl_bh(bond);
932
933
934 bond->recv_probe = rlb_arp_recv;
935
936 return 0;
937}
938
939static void rlb_deinitialize(struct bonding *bond)
940{
941 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
942
943 _lock_rx_hashtbl_bh(bond);
944
945 kfree(bond_info->rx_hashtbl);
946 bond_info->rx_hashtbl = NULL;
947 bond_info->rx_hashtbl_used_head = RLB_NULL_INDEX;
948
949 _unlock_rx_hashtbl_bh(bond);
950}
951
952static void rlb_clear_vlan(struct bonding *bond, unsigned short vlan_id)
953{
954 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
955 u32 curr_index;
956
957 _lock_rx_hashtbl_bh(bond);
958
959 curr_index = bond_info->rx_hashtbl_used_head;
960 while (curr_index != RLB_NULL_INDEX) {
961 struct rlb_client_info *curr = &(bond_info->rx_hashtbl[curr_index]);
962 u32 next_index = bond_info->rx_hashtbl[curr_index].used_next;
963
964 if (curr->tag && (curr->vlan_id == vlan_id))
965 rlb_delete_table_entry(bond, curr_index);
966
967 curr_index = next_index;
968 }
969
970 _unlock_rx_hashtbl_bh(bond);
971}
972
973
974
975static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[])
976{
977 struct bonding *bond = bond_get_bond_by_slave(slave);
978 struct learning_pkt pkt;
979 int size = sizeof(struct learning_pkt);
980 int i;
981
982 memset(&pkt, 0, size);
983 memcpy(pkt.mac_dst, mac_addr, ETH_ALEN);
984 memcpy(pkt.mac_src, mac_addr, ETH_ALEN);
985 pkt.type = cpu_to_be16(ETH_P_LOOP);
986
987 for (i = 0; i < MAX_LP_BURST; i++) {
988 struct sk_buff *skb;
989 char *data;
990
991 skb = dev_alloc_skb(size);
992 if (!skb) {
993 return;
994 }
995
996 data = skb_put(skb, size);
997 memcpy(data, &pkt, size);
998
999 skb_reset_mac_header(skb);
1000 skb->network_header = skb->mac_header + ETH_HLEN;
1001 skb->protocol = pkt.type;
1002 skb->priority = TC_PRIO_CONTROL;
1003 skb->dev = slave->dev;
1004
1005 if (bond_vlan_used(bond)) {
1006 struct vlan_entry *vlan;
1007
1008 vlan = bond_next_vlan(bond,
1009 bond->alb_info.current_alb_vlan);
1010
1011 bond->alb_info.current_alb_vlan = vlan;
1012 if (!vlan) {
1013 kfree_skb(skb);
1014 continue;
1015 }
1016
1017 skb = vlan_put_tag(skb, htons(ETH_P_8021Q), vlan->vlan_id);
1018 if (!skb) {
1019 pr_err("%s: Error: failed to insert VLAN tag\n",
1020 bond->dev->name);
1021 continue;
1022 }
1023 }
1024
1025 dev_queue_xmit(skb);
1026 }
1027}
1028
1029static int alb_set_slave_mac_addr(struct slave *slave, u8 addr[])
1030{
1031 struct net_device *dev = slave->dev;
1032 struct sockaddr s_addr;
1033
1034 if (slave->bond->params.mode == BOND_MODE_TLB) {
1035 memcpy(dev->dev_addr, addr, dev->addr_len);
1036 return 0;
1037 }
1038
1039
1040
1041 memcpy(s_addr.sa_data, addr, dev->addr_len);
1042 s_addr.sa_family = dev->type;
1043 if (dev_set_mac_address(dev, &s_addr)) {
1044 pr_err("%s: Error: dev_set_mac_address of dev %s failed!\n"
1045 "ALB mode requires that the base driver support setting the hw address also when the network device's interface is open\n",
1046 slave->bond->dev->name, dev->name);
1047 return -EOPNOTSUPP;
1048 }
1049 return 0;
1050}
1051
1052
1053
1054
1055
1056
1057
1058
1059static void alb_swap_mac_addr(struct bonding *bond, struct slave *slave1, struct slave *slave2)
1060{
1061 u8 tmp_mac_addr[ETH_ALEN];
1062
1063 memcpy(tmp_mac_addr, slave1->dev->dev_addr, ETH_ALEN);
1064 alb_set_slave_mac_addr(slave1, slave2->dev->dev_addr);
1065 alb_set_slave_mac_addr(slave2, tmp_mac_addr);
1066
1067}
1068
1069
1070
1071
1072
1073
1074static void alb_fasten_mac_swap(struct bonding *bond, struct slave *slave1,
1075 struct slave *slave2)
1076{
1077 int slaves_state_differ = (SLAVE_IS_OK(slave1) != SLAVE_IS_OK(slave2));
1078 struct slave *disabled_slave = NULL;
1079
1080 ASSERT_RTNL();
1081
1082
1083 if (SLAVE_IS_OK(slave1)) {
1084 alb_send_learning_packets(slave1, slave1->dev->dev_addr);
1085 if (bond->alb_info.rlb_enabled) {
1086
1087
1088
1089 rlb_req_update_slave_clients(bond, slave1);
1090 }
1091 } else {
1092 disabled_slave = slave1;
1093 }
1094
1095 if (SLAVE_IS_OK(slave2)) {
1096 alb_send_learning_packets(slave2, slave2->dev->dev_addr);
1097 if (bond->alb_info.rlb_enabled) {
1098
1099
1100
1101 rlb_req_update_slave_clients(bond, slave2);
1102 }
1103 } else {
1104 disabled_slave = slave2;
1105 }
1106
1107 if (bond->alb_info.rlb_enabled && slaves_state_differ) {
1108
1109 rlb_teach_disabled_mac_on_primary(bond,
1110 disabled_slave->dev->dev_addr);
1111 }
1112}
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128static void alb_change_hw_addr_on_detach(struct bonding *bond, struct slave *slave)
1129{
1130 int perm_curr_diff;
1131 int perm_bond_diff;
1132
1133 perm_curr_diff = !ether_addr_equal_64bits(slave->perm_hwaddr,
1134 slave->dev->dev_addr);
1135 perm_bond_diff = !ether_addr_equal_64bits(slave->perm_hwaddr,
1136 bond->dev->dev_addr);
1137
1138 if (perm_curr_diff && perm_bond_diff) {
1139 struct slave *tmp_slave;
1140 int i, found = 0;
1141
1142 bond_for_each_slave(bond, tmp_slave, i) {
1143 if (ether_addr_equal_64bits(slave->perm_hwaddr,
1144 tmp_slave->dev->dev_addr)) {
1145 found = 1;
1146 break;
1147 }
1148 }
1149
1150 if (found) {
1151
1152 alb_swap_mac_addr(bond, slave, tmp_slave);
1153 alb_fasten_mac_swap(bond, slave, tmp_slave);
1154 }
1155 }
1156}
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183static int alb_handle_addr_collision_on_attach(struct bonding *bond, struct slave *slave)
1184{
1185 struct slave *tmp_slave1, *tmp_slave2, *free_mac_slave;
1186 struct slave *has_bond_addr = bond->curr_active_slave;
1187 int i, j, found = 0;
1188
1189 if (bond->slave_cnt == 0) {
1190
1191 return 0;
1192 }
1193
1194
1195
1196
1197
1198 if (!ether_addr_equal_64bits(slave->perm_hwaddr, bond->dev->dev_addr)) {
1199 bond_for_each_slave(bond, tmp_slave1, i) {
1200 if (ether_addr_equal_64bits(tmp_slave1->dev->dev_addr,
1201 slave->dev->dev_addr)) {
1202 found = 1;
1203 break;
1204 }
1205 }
1206
1207 if (!found)
1208 return 0;
1209
1210
1211
1212 alb_set_slave_mac_addr(slave, bond->dev->dev_addr);
1213 }
1214
1215
1216
1217
1218 free_mac_slave = NULL;
1219
1220 bond_for_each_slave(bond, tmp_slave1, i) {
1221 found = 0;
1222 bond_for_each_slave(bond, tmp_slave2, j) {
1223 if (ether_addr_equal_64bits(tmp_slave1->perm_hwaddr,
1224 tmp_slave2->dev->dev_addr)) {
1225 found = 1;
1226 break;
1227 }
1228 }
1229
1230 if (!found) {
1231
1232
1233
1234 free_mac_slave = tmp_slave1;
1235 break;
1236 }
1237
1238 if (!has_bond_addr) {
1239 if (ether_addr_equal_64bits(tmp_slave1->dev->dev_addr,
1240 bond->dev->dev_addr)) {
1241
1242 has_bond_addr = tmp_slave1;
1243 }
1244 }
1245 }
1246
1247 if (free_mac_slave) {
1248 alb_set_slave_mac_addr(slave, free_mac_slave->perm_hwaddr);
1249
1250 pr_warning("%s: Warning: the hw address of slave %s is in use by the bond; giving it the hw address of %s\n",
1251 bond->dev->name, slave->dev->name,
1252 free_mac_slave->dev->name);
1253
1254 } else if (has_bond_addr) {
1255 pr_err("%s: Error: the hw address of slave %s is in use by the bond; couldn't find a slave with a free hw address to give it (this should not have happened)\n",
1256 bond->dev->name, slave->dev->name);
1257 return -EFAULT;
1258 }
1259
1260 return 0;
1261}
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277static int alb_set_mac_address(struct bonding *bond, void *addr)
1278{
1279 struct sockaddr sa;
1280 struct slave *slave, *stop_at;
1281 char tmp_addr[ETH_ALEN];
1282 int res;
1283 int i;
1284
1285 if (bond->alb_info.rlb_enabled) {
1286 return 0;
1287 }
1288
1289 bond_for_each_slave(bond, slave, i) {
1290
1291 memcpy(tmp_addr, slave->dev->dev_addr, ETH_ALEN);
1292
1293 res = dev_set_mac_address(slave->dev, addr);
1294
1295
1296 memcpy(slave->dev->dev_addr, tmp_addr, ETH_ALEN);
1297
1298 if (res)
1299 goto unwind;
1300 }
1301
1302 return 0;
1303
1304unwind:
1305 memcpy(sa.sa_data, bond->dev->dev_addr, bond->dev->addr_len);
1306 sa.sa_family = bond->dev->type;
1307
1308
1309 stop_at = slave;
1310 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
1311 memcpy(tmp_addr, slave->dev->dev_addr, ETH_ALEN);
1312 dev_set_mac_address(slave->dev, &sa);
1313 memcpy(slave->dev->dev_addr, tmp_addr, ETH_ALEN);
1314 }
1315
1316 return res;
1317}
1318
1319
1320
1321int bond_alb_initialize(struct bonding *bond, int rlb_enabled)
1322{
1323 int res;
1324
1325 res = tlb_initialize(bond);
1326 if (res) {
1327 return res;
1328 }
1329
1330 if (rlb_enabled) {
1331 bond->alb_info.rlb_enabled = 1;
1332
1333 res = rlb_initialize(bond);
1334 if (res) {
1335 tlb_deinitialize(bond);
1336 return res;
1337 }
1338 } else {
1339 bond->alb_info.rlb_enabled = 0;
1340 }
1341
1342 return 0;
1343}
1344
1345void bond_alb_deinitialize(struct bonding *bond)
1346{
1347 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
1348
1349 tlb_deinitialize(bond);
1350
1351 if (bond_info->rlb_enabled) {
1352 rlb_deinitialize(bond);
1353 }
1354}
1355
1356int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev)
1357{
1358 struct bonding *bond = netdev_priv(bond_dev);
1359 struct ethhdr *eth_data;
1360 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
1361 struct slave *tx_slave = NULL;
1362 static const __be32 ip_bcast = htonl(0xffffffff);
1363 int hash_size = 0;
1364 int do_tx_balance = 1;
1365 u32 hash_index = 0;
1366 const u8 *hash_start = NULL;
1367 int res = 1;
1368 struct ipv6hdr *ip6hdr;
1369
1370 skb_reset_mac_header(skb);
1371 eth_data = eth_hdr(skb);
1372
1373
1374
1375 read_lock(&bond->curr_slave_lock);
1376
1377 switch (ntohs(skb->protocol)) {
1378 case ETH_P_IP: {
1379 const struct iphdr *iph = ip_hdr(skb);
1380
1381 if (ether_addr_equal_64bits(eth_data->h_dest, mac_bcast) ||
1382 (iph->daddr == ip_bcast) ||
1383 (iph->protocol == IPPROTO_IGMP)) {
1384 do_tx_balance = 0;
1385 break;
1386 }
1387 hash_start = (char *)&(iph->daddr);
1388 hash_size = sizeof(iph->daddr);
1389 }
1390 break;
1391 case ETH_P_IPV6:
1392
1393
1394
1395 if (ether_addr_equal_64bits(eth_data->h_dest, mac_bcast)) {
1396 do_tx_balance = 0;
1397 break;
1398 }
1399
1400
1401
1402
1403 if (ether_addr_equal_64bits(eth_data->h_dest, mac_v6_allmcast)) {
1404 do_tx_balance = 0;
1405 break;
1406 }
1407
1408
1409
1410
1411
1412 ip6hdr = ipv6_hdr(skb);
1413 if (ipv6_addr_any(&ip6hdr->saddr)) {
1414 do_tx_balance = 0;
1415 break;
1416 }
1417
1418 hash_start = (char *)&(ipv6_hdr(skb)->daddr);
1419 hash_size = sizeof(ipv6_hdr(skb)->daddr);
1420 break;
1421 case ETH_P_IPX:
1422 if (ipx_hdr(skb)->ipx_checksum != IPX_NO_CHECKSUM) {
1423
1424 do_tx_balance = 0;
1425 break;
1426 }
1427
1428 if (ipx_hdr(skb)->ipx_type != IPX_TYPE_NCP) {
1429
1430
1431
1432
1433 do_tx_balance = 0;
1434 break;
1435 }
1436
1437 hash_start = (char*)eth_data->h_dest;
1438 hash_size = ETH_ALEN;
1439 break;
1440 case ETH_P_ARP:
1441 do_tx_balance = 0;
1442 if (bond_info->rlb_enabled) {
1443 tx_slave = rlb_arp_xmit(skb, bond);
1444 }
1445 break;
1446 default:
1447 do_tx_balance = 0;
1448 break;
1449 }
1450
1451 if (do_tx_balance) {
1452 hash_index = _simple_hash(hash_start, hash_size);
1453 tx_slave = tlb_choose_channel(bond, hash_index, skb->len);
1454 }
1455
1456 if (!tx_slave) {
1457
1458 tx_slave = bond->curr_active_slave;
1459 bond_info->unbalanced_load += skb->len;
1460 }
1461
1462 if (tx_slave && SLAVE_IS_OK(tx_slave)) {
1463 if (tx_slave != bond->curr_active_slave) {
1464 memcpy(eth_data->h_source,
1465 tx_slave->dev->dev_addr,
1466 ETH_ALEN);
1467 }
1468
1469 res = bond_dev_queue_xmit(bond, skb, tx_slave->dev);
1470 } else {
1471 if (tx_slave) {
1472 _lock_tx_hashtbl(bond);
1473 __tlb_clear_slave(bond, tx_slave, 0);
1474 _unlock_tx_hashtbl(bond);
1475 }
1476 }
1477
1478 read_unlock(&bond->curr_slave_lock);
1479
1480 if (res) {
1481
1482 kfree_skb(skb);
1483 }
1484 return NETDEV_TX_OK;
1485}
1486
1487void bond_alb_monitor(struct work_struct *work)
1488{
1489 struct bonding *bond = container_of(work, struct bonding,
1490 alb_work.work);
1491 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
1492 struct slave *slave;
1493 int i;
1494
1495 read_lock(&bond->lock);
1496
1497 if (bond->slave_cnt == 0) {
1498 bond_info->tx_rebalance_counter = 0;
1499 bond_info->lp_counter = 0;
1500 goto re_arm;
1501 }
1502
1503 bond_info->tx_rebalance_counter++;
1504 bond_info->lp_counter++;
1505
1506
1507 if (bond_info->lp_counter >= BOND_ALB_LP_TICKS) {
1508
1509
1510
1511
1512
1513 read_lock(&bond->curr_slave_lock);
1514
1515 bond_for_each_slave(bond, slave, i) {
1516 alb_send_learning_packets(slave, slave->dev->dev_addr);
1517 }
1518
1519 read_unlock(&bond->curr_slave_lock);
1520
1521 bond_info->lp_counter = 0;
1522 }
1523
1524
1525 if (bond_info->tx_rebalance_counter >= BOND_TLB_REBALANCE_TICKS) {
1526
1527 read_lock(&bond->curr_slave_lock);
1528
1529 bond_for_each_slave(bond, slave, i) {
1530 tlb_clear_slave(bond, slave, 1);
1531 if (slave == bond->curr_active_slave) {
1532 SLAVE_TLB_INFO(slave).load =
1533 bond_info->unbalanced_load /
1534 BOND_TLB_REBALANCE_INTERVAL;
1535 bond_info->unbalanced_load = 0;
1536 }
1537 }
1538
1539 read_unlock(&bond->curr_slave_lock);
1540
1541 bond_info->tx_rebalance_counter = 0;
1542 }
1543
1544
1545 if (bond_info->rlb_enabled) {
1546 if (bond_info->primary_is_promisc &&
1547 (++bond_info->rlb_promisc_timeout_counter >= RLB_PROMISC_TIMEOUT)) {
1548
1549
1550
1551
1552
1553 read_unlock(&bond->lock);
1554 if (!rtnl_trylock()) {
1555 read_lock(&bond->lock);
1556 goto re_arm;
1557 }
1558
1559 bond_info->rlb_promisc_timeout_counter = 0;
1560
1561
1562
1563
1564
1565 dev_set_promiscuity(bond->curr_active_slave->dev, -1);
1566 bond_info->primary_is_promisc = 0;
1567
1568 rtnl_unlock();
1569 read_lock(&bond->lock);
1570 }
1571
1572 if (bond_info->rlb_rebalance) {
1573 bond_info->rlb_rebalance = 0;
1574 rlb_rebalance(bond);
1575 }
1576
1577
1578 if (bond_info->rx_ntt) {
1579 if (bond_info->rlb_update_delay_counter) {
1580 --bond_info->rlb_update_delay_counter;
1581 } else {
1582 rlb_update_rx_clients(bond);
1583 if (bond_info->rlb_update_retry_counter) {
1584 --bond_info->rlb_update_retry_counter;
1585 } else {
1586 bond_info->rx_ntt = 0;
1587 }
1588 }
1589 }
1590 }
1591
1592re_arm:
1593 queue_delayed_work(bond->wq, &bond->alb_work, alb_delta_in_ticks);
1594
1595 read_unlock(&bond->lock);
1596}
1597
1598
1599
1600
1601int bond_alb_init_slave(struct bonding *bond, struct slave *slave)
1602{
1603 int res;
1604
1605 res = alb_set_slave_mac_addr(slave, slave->perm_hwaddr);
1606 if (res) {
1607 return res;
1608 }
1609
1610
1611
1612
1613 read_lock(&bond->lock);
1614
1615 res = alb_handle_addr_collision_on_attach(bond, slave);
1616
1617 read_unlock(&bond->lock);
1618
1619 if (res) {
1620 return res;
1621 }
1622
1623 tlb_init_slave(slave);
1624
1625
1626 bond->alb_info.tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS;
1627
1628 if (bond->alb_info.rlb_enabled) {
1629 bond->alb_info.rlb_rebalance = 1;
1630 }
1631
1632 return 0;
1633}
1634
1635
1636
1637
1638
1639
1640
1641void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave)
1642{
1643 if (bond->slave_cnt > 1) {
1644 alb_change_hw_addr_on_detach(bond, slave);
1645 }
1646
1647 tlb_clear_slave(bond, slave, 0);
1648
1649 if (bond->alb_info.rlb_enabled) {
1650 bond->alb_info.next_rx_slave = NULL;
1651 rlb_clear_slave(bond, slave);
1652 }
1653}
1654
1655
1656void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link)
1657{
1658 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
1659
1660 if (link == BOND_LINK_DOWN) {
1661 tlb_clear_slave(bond, slave, 0);
1662 if (bond->alb_info.rlb_enabled) {
1663 rlb_clear_slave(bond, slave);
1664 }
1665 } else if (link == BOND_LINK_UP) {
1666
1667 bond_info->tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS;
1668 if (bond->alb_info.rlb_enabled) {
1669 bond->alb_info.rlb_rebalance = 1;
1670
1671
1672
1673
1674
1675 }
1676 }
1677}
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave)
1695 __releases(&bond->curr_slave_lock)
1696 __releases(&bond->lock)
1697 __acquires(&bond->lock)
1698 __acquires(&bond->curr_slave_lock)
1699{
1700 struct slave *swap_slave;
1701 int i;
1702
1703 if (bond->curr_active_slave == new_slave) {
1704 return;
1705 }
1706
1707 if (bond->curr_active_slave && bond->alb_info.primary_is_promisc) {
1708 dev_set_promiscuity(bond->curr_active_slave->dev, -1);
1709 bond->alb_info.primary_is_promisc = 0;
1710 bond->alb_info.rlb_promisc_timeout_counter = 0;
1711 }
1712
1713 swap_slave = bond->curr_active_slave;
1714 bond->curr_active_slave = new_slave;
1715
1716 if (!new_slave || (bond->slave_cnt == 0)) {
1717 return;
1718 }
1719
1720
1721
1722
1723 if (!swap_slave) {
1724 struct slave *tmp_slave;
1725
1726 bond_for_each_slave(bond, tmp_slave, i) {
1727 if (ether_addr_equal_64bits(tmp_slave->dev->dev_addr,
1728 bond->dev->dev_addr)) {
1729 swap_slave = tmp_slave;
1730 break;
1731 }
1732 }
1733 }
1734
1735
1736
1737
1738
1739
1740 if (swap_slave) {
1741 tlb_clear_slave(bond, swap_slave, 1);
1742 }
1743 tlb_clear_slave(bond, new_slave, 1);
1744
1745 write_unlock_bh(&bond->curr_slave_lock);
1746 read_unlock(&bond->lock);
1747
1748 ASSERT_RTNL();
1749
1750
1751 if (swap_slave) {
1752
1753 alb_swap_mac_addr(bond, swap_slave, new_slave);
1754 } else {
1755
1756 alb_set_slave_mac_addr(new_slave, bond->dev->dev_addr);
1757 }
1758
1759 if (swap_slave) {
1760 alb_fasten_mac_swap(bond, swap_slave, new_slave);
1761 read_lock(&bond->lock);
1762 } else {
1763 read_lock(&bond->lock);
1764 alb_send_learning_packets(new_slave, bond->dev->dev_addr);
1765 }
1766
1767 write_lock_bh(&bond->curr_slave_lock);
1768}
1769
1770
1771
1772
1773int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr)
1774 __acquires(&bond->lock)
1775 __releases(&bond->lock)
1776{
1777 struct bonding *bond = netdev_priv(bond_dev);
1778 struct sockaddr *sa = addr;
1779 struct slave *slave, *swap_slave;
1780 int res;
1781 int i;
1782
1783 if (!is_valid_ether_addr(sa->sa_data)) {
1784 return -EADDRNOTAVAIL;
1785 }
1786
1787 res = alb_set_mac_address(bond, addr);
1788 if (res) {
1789 return res;
1790 }
1791
1792 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
1793
1794
1795
1796
1797
1798 if (!bond->curr_active_slave) {
1799 return 0;
1800 }
1801
1802 swap_slave = NULL;
1803
1804 bond_for_each_slave(bond, slave, i) {
1805 if (ether_addr_equal_64bits(slave->dev->dev_addr,
1806 bond_dev->dev_addr)) {
1807 swap_slave = slave;
1808 break;
1809 }
1810 }
1811
1812 if (swap_slave) {
1813 alb_swap_mac_addr(bond, swap_slave, bond->curr_active_slave);
1814 alb_fasten_mac_swap(bond, swap_slave, bond->curr_active_slave);
1815 } else {
1816 alb_set_slave_mac_addr(bond->curr_active_slave, bond_dev->dev_addr);
1817
1818 read_lock(&bond->lock);
1819 alb_send_learning_packets(bond->curr_active_slave, bond_dev->dev_addr);
1820 if (bond->alb_info.rlb_enabled) {
1821
1822 rlb_req_update_slave_clients(bond, bond->curr_active_slave);
1823 }
1824 read_unlock(&bond->lock);
1825 }
1826
1827 return 0;
1828}
1829
1830void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id)
1831{
1832 if (bond->alb_info.current_alb_vlan &&
1833 (bond->alb_info.current_alb_vlan->vlan_id == vlan_id)) {
1834 bond->alb_info.current_alb_vlan = NULL;
1835 }
1836
1837 if (bond->alb_info.rlb_enabled) {
1838 rlb_clear_vlan(bond, vlan_id);
1839 }
1840}
1841
1842