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33
34#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
35
36#include <linux/kernel.h>
37#include <linux/module.h>
38#include <linux/types.h>
39#include <linux/fcntl.h>
40#include <linux/interrupt.h>
41#include <linux/ptrace.h>
42#include <linux/ioport.h>
43#include <linux/in.h>
44#include <net/ip.h>
45#include <linux/ip.h>
46#include <linux/tcp.h>
47#include <linux/udp.h>
48#include <linux/slab.h>
49#include <linux/string.h>
50#include <linux/init.h>
51#include <linux/timer.h>
52#include <linux/socket.h>
53#include <linux/ctype.h>
54#include <linux/inet.h>
55#include <linux/bitops.h>
56#include <linux/io.h>
57#include <asm/dma.h>
58#include <linux/uaccess.h>
59#include <linux/errno.h>
60#include <linux/netdevice.h>
61#include <linux/inetdevice.h>
62#include <linux/igmp.h>
63#include <linux/etherdevice.h>
64#include <linux/skbuff.h>
65#include <net/sock.h>
66#include <linux/rtnetlink.h>
67#include <linux/smp.h>
68#include <linux/if_ether.h>
69#include <net/arp.h>
70#include <linux/mii.h>
71#include <linux/ethtool.h>
72#include <linux/if_vlan.h>
73#include <linux/if_bonding.h>
74#include <linux/jiffies.h>
75#include <linux/preempt.h>
76#include <net/route.h>
77#include <net/net_namespace.h>
78#include <net/netns/generic.h>
79#include <net/pkt_sched.h>
80#include "bonding.h"
81#include "bond_3ad.h"
82#include "bond_alb.h"
83
84
85
86
87#define BOND_LINK_MON_INTERV 0
88#define BOND_LINK_ARP_INTERV 0
89
90static int max_bonds = BOND_DEFAULT_MAX_BONDS;
91static int tx_queues = BOND_DEFAULT_TX_QUEUES;
92static int num_peer_notif = 1;
93static int miimon = BOND_LINK_MON_INTERV;
94static int updelay;
95static int downdelay;
96static int use_carrier = 1;
97static char *mode;
98static char *primary;
99static char *primary_reselect;
100static char *lacp_rate;
101static int min_links;
102static char *ad_select;
103static char *xmit_hash_policy;
104static int arp_interval = BOND_LINK_ARP_INTERV;
105static char *arp_ip_target[BOND_MAX_ARP_TARGETS];
106static char *arp_validate;
107static char *arp_all_targets;
108static char *fail_over_mac;
109static int all_slaves_active = 0;
110static struct bond_params bonding_defaults;
111static int resend_igmp = BOND_DEFAULT_RESEND_IGMP;
112
113module_param(max_bonds, int, 0);
114MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
115module_param(tx_queues, int, 0);
116MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)");
117module_param_named(num_grat_arp, num_peer_notif, int, 0644);
118MODULE_PARM_DESC(num_grat_arp, "Number of peer notifications to send on "
119 "failover event (alias of num_unsol_na)");
120module_param_named(num_unsol_na, num_peer_notif, int, 0644);
121MODULE_PARM_DESC(num_unsol_na, "Number of peer notifications to send on "
122 "failover event (alias of num_grat_arp)");
123module_param(miimon, int, 0);
124MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
125module_param(updelay, int, 0);
126MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
127module_param(downdelay, int, 0);
128MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
129 "in milliseconds");
130module_param(use_carrier, int, 0);
131MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
132 "0 for off, 1 for on (default)");
133module_param(mode, charp, 0);
134MODULE_PARM_DESC(mode, "Mode of operation; 0 for balance-rr, "
135 "1 for active-backup, 2 for balance-xor, "
136 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
137 "6 for balance-alb");
138module_param(primary, charp, 0);
139MODULE_PARM_DESC(primary, "Primary network device to use");
140module_param(primary_reselect, charp, 0);
141MODULE_PARM_DESC(primary_reselect, "Reselect primary slave "
142 "once it comes up; "
143 "0 for always (default), "
144 "1 for only if speed of primary is "
145 "better, "
146 "2 for only on active slave "
147 "failure");
148module_param(lacp_rate, charp, 0);
149MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner; "
150 "0 for slow, 1 for fast");
151module_param(ad_select, charp, 0);
152MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic; "
153 "0 for stable (default), 1 for bandwidth, "
154 "2 for count");
155module_param(min_links, int, 0);
156MODULE_PARM_DESC(min_links, "Minimum number of available links before turning on carrier");
157
158module_param(xmit_hash_policy, charp, 0);
159MODULE_PARM_DESC(xmit_hash_policy, "balance-xor and 802.3ad hashing method; "
160 "0 for layer 2 (default), 1 for layer 3+4, "
161 "2 for layer 2+3");
162module_param(arp_interval, int, 0);
163MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
164module_param_array(arp_ip_target, charp, NULL, 0);
165MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
166module_param(arp_validate, charp, 0);
167MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes; "
168 "0 for none (default), 1 for active, "
169 "2 for backup, 3 for all");
170module_param(arp_all_targets, charp, 0);
171MODULE_PARM_DESC(arp_all_targets, "fail on any/all arp targets timeout; 0 for any (default), 1 for all");
172module_param(fail_over_mac, charp, 0);
173MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to "
174 "the same MAC; 0 for none (default), "
175 "1 for active, 2 for follow");
176module_param(all_slaves_active, int, 0);
177MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface"
178 "by setting active flag for all slaves; "
179 "0 for never (default), 1 for always.");
180module_param(resend_igmp, int, 0);
181MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on "
182 "link failure");
183
184
185
186#ifdef CONFIG_NET_POLL_CONTROLLER
187atomic_t netpoll_block_tx = ATOMIC_INIT(0);
188#endif
189
190int bond_net_id __read_mostly;
191
192static __be32 arp_target[BOND_MAX_ARP_TARGETS];
193static int arp_ip_count;
194static int bond_mode = BOND_MODE_ROUNDROBIN;
195static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2;
196static int lacp_fast;
197
198const struct bond_parm_tbl bond_lacp_tbl[] = {
199{ "slow", AD_LACP_SLOW},
200{ "fast", AD_LACP_FAST},
201{ NULL, -1},
202};
203
204const struct bond_parm_tbl bond_mode_tbl[] = {
205{ "balance-rr", BOND_MODE_ROUNDROBIN},
206{ "active-backup", BOND_MODE_ACTIVEBACKUP},
207{ "balance-xor", BOND_MODE_XOR},
208{ "broadcast", BOND_MODE_BROADCAST},
209{ "802.3ad", BOND_MODE_8023AD},
210{ "balance-tlb", BOND_MODE_TLB},
211{ "balance-alb", BOND_MODE_ALB},
212{ NULL, -1},
213};
214
215const struct bond_parm_tbl xmit_hashtype_tbl[] = {
216{ "layer2", BOND_XMIT_POLICY_LAYER2},
217{ "layer3+4", BOND_XMIT_POLICY_LAYER34},
218{ "layer2+3", BOND_XMIT_POLICY_LAYER23},
219{ NULL, -1},
220};
221
222const struct bond_parm_tbl arp_all_targets_tbl[] = {
223{ "any", BOND_ARP_TARGETS_ANY},
224{ "all", BOND_ARP_TARGETS_ALL},
225{ NULL, -1},
226};
227
228const struct bond_parm_tbl arp_validate_tbl[] = {
229{ "none", BOND_ARP_VALIDATE_NONE},
230{ "active", BOND_ARP_VALIDATE_ACTIVE},
231{ "backup", BOND_ARP_VALIDATE_BACKUP},
232{ "all", BOND_ARP_VALIDATE_ALL},
233{ NULL, -1},
234};
235
236const struct bond_parm_tbl fail_over_mac_tbl[] = {
237{ "none", BOND_FOM_NONE},
238{ "active", BOND_FOM_ACTIVE},
239{ "follow", BOND_FOM_FOLLOW},
240{ NULL, -1},
241};
242
243const struct bond_parm_tbl pri_reselect_tbl[] = {
244{ "always", BOND_PRI_RESELECT_ALWAYS},
245{ "better", BOND_PRI_RESELECT_BETTER},
246{ "failure", BOND_PRI_RESELECT_FAILURE},
247{ NULL, -1},
248};
249
250struct bond_parm_tbl ad_select_tbl[] = {
251{ "stable", BOND_AD_STABLE},
252{ "bandwidth", BOND_AD_BANDWIDTH},
253{ "count", BOND_AD_COUNT},
254{ NULL, -1},
255};
256
257
258
259static int bond_init(struct net_device *bond_dev);
260static void bond_uninit(struct net_device *bond_dev);
261
262
263
264const char *bond_mode_name(int mode)
265{
266 static const char *names[] = {
267 [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)",
268 [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)",
269 [BOND_MODE_XOR] = "load balancing (xor)",
270 [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)",
271 [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation",
272 [BOND_MODE_TLB] = "transmit load balancing",
273 [BOND_MODE_ALB] = "adaptive load balancing",
274 };
275
276 if (mode < 0 || mode > BOND_MODE_ALB)
277 return "unknown";
278
279 return names[mode];
280}
281
282
283
284
285
286
287
288
289
290
291static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id)
292{
293 struct vlan_entry *vlan;
294
295 pr_debug("bond: %s, vlan id %d\n",
296 (bond ? bond->dev->name : "None"), vlan_id);
297
298 vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL);
299 if (!vlan)
300 return -ENOMEM;
301
302 INIT_LIST_HEAD(&vlan->vlan_list);
303 vlan->vlan_id = vlan_id;
304
305 write_lock_bh(&bond->lock);
306
307 list_add_tail(&vlan->vlan_list, &bond->vlan_list);
308
309 write_unlock_bh(&bond->lock);
310
311 pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name);
312
313 return 0;
314}
315
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317
318
319
320
321
322
323static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id)
324{
325 struct vlan_entry *vlan;
326 int res = -ENODEV;
327
328 pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id);
329
330 block_netpoll_tx();
331 write_lock_bh(&bond->lock);
332
333 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
334 if (vlan->vlan_id == vlan_id) {
335 list_del(&vlan->vlan_list);
336
337 if (bond_is_lb(bond))
338 bond_alb_clear_vlan(bond, vlan_id);
339
340 pr_debug("removed VLAN ID %d from bond %s\n",
341 vlan_id, bond->dev->name);
342
343 kfree(vlan);
344
345 res = 0;
346 goto out;
347 }
348 }
349
350 pr_debug("couldn't find VLAN ID %d in bond %s\n",
351 vlan_id, bond->dev->name);
352
353out:
354 write_unlock_bh(&bond->lock);
355 unblock_netpoll_tx();
356 return res;
357}
358
359
360
361
362
363
364
365
366
367
368
369struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr)
370{
371 struct vlan_entry *next, *last;
372
373 if (list_empty(&bond->vlan_list))
374 return NULL;
375
376 if (!curr) {
377 next = list_entry(bond->vlan_list.next,
378 struct vlan_entry, vlan_list);
379 } else {
380 last = list_entry(bond->vlan_list.prev,
381 struct vlan_entry, vlan_list);
382 if (last == curr) {
383 next = list_entry(bond->vlan_list.next,
384 struct vlan_entry, vlan_list);
385 } else {
386 next = list_entry(curr->vlan_list.next,
387 struct vlan_entry, vlan_list);
388 }
389 }
390
391 return next;
392}
393
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398
399
400
401int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
402 struct net_device *slave_dev)
403{
404 skb->dev = slave_dev;
405
406 BUILD_BUG_ON(sizeof(skb->queue_mapping) !=
407 sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping));
408 skb->queue_mapping = qdisc_skb_cb(skb)->slave_dev_queue_mapping;
409
410 if (unlikely(netpoll_tx_running(bond->dev)))
411 bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb);
412 else
413 dev_queue_xmit(skb);
414
415 return 0;
416}
417
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439
440static int bond_vlan_rx_add_vid(struct net_device *bond_dev,
441 __be16 proto, u16 vid)
442{
443 struct bonding *bond = netdev_priv(bond_dev);
444 struct slave *slave, *stop_at;
445 int i, res;
446
447 bond_for_each_slave(bond, slave, i) {
448 res = vlan_vid_add(slave->dev, proto, vid);
449 if (res)
450 goto unwind;
451 }
452
453 res = bond_add_vlan(bond, vid);
454 if (res) {
455 pr_err("%s: Error: Failed to add vlan id %d\n",
456 bond_dev->name, vid);
457 return res;
458 }
459
460 return 0;
461
462unwind:
463
464 stop_at = slave;
465 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at)
466 vlan_vid_del(slave->dev, proto, vid);
467
468 return res;
469}
470
471
472
473
474
475
476static int bond_vlan_rx_kill_vid(struct net_device *bond_dev,
477 __be16 proto, u16 vid)
478{
479 struct bonding *bond = netdev_priv(bond_dev);
480 struct slave *slave;
481 int i, res;
482
483 bond_for_each_slave(bond, slave, i)
484 vlan_vid_del(slave->dev, proto, vid);
485
486 res = bond_del_vlan(bond, vid);
487 if (res) {
488 pr_err("%s: Error: Failed to remove vlan id %d\n",
489 bond_dev->name, vid);
490 return res;
491 }
492
493 return 0;
494}
495
496static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev)
497{
498 struct vlan_entry *vlan;
499 int res;
500
501 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
502 res = vlan_vid_add(slave_dev, htons(ETH_P_8021Q),
503 vlan->vlan_id);
504 if (res)
505 pr_warning("%s: Failed to add vlan id %d to device %s\n",
506 bond->dev->name, vlan->vlan_id,
507 slave_dev->name);
508 }
509}
510
511static void bond_del_vlans_from_slave(struct bonding *bond,
512 struct net_device *slave_dev)
513{
514 struct vlan_entry *vlan;
515
516 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
517 if (!vlan->vlan_id)
518 continue;
519 vlan_vid_del(slave_dev, htons(ETH_P_8021Q), vlan->vlan_id);
520 }
521}
522
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524
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526
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529
530
531
532static int bond_set_carrier(struct bonding *bond)
533{
534 struct slave *slave;
535 int i;
536
537 if (bond->slave_cnt == 0)
538 goto down;
539
540 if (bond->params.mode == BOND_MODE_8023AD)
541 return bond_3ad_set_carrier(bond);
542
543 bond_for_each_slave(bond, slave, i) {
544 if (slave->link == BOND_LINK_UP) {
545 if (!netif_carrier_ok(bond->dev)) {
546 netif_carrier_on(bond->dev);
547 return 1;
548 }
549 return 0;
550 }
551 }
552
553down:
554 if (netif_carrier_ok(bond->dev)) {
555 netif_carrier_off(bond->dev);
556 return 1;
557 }
558 return 0;
559}
560
561
562
563
564
565
566
567static void bond_update_speed_duplex(struct slave *slave)
568{
569 struct net_device *slave_dev = slave->dev;
570 struct ethtool_cmd ecmd;
571 u32 slave_speed;
572 int res;
573
574 slave->speed = SPEED_UNKNOWN;
575 slave->duplex = DUPLEX_UNKNOWN;
576
577 res = __ethtool_get_settings(slave_dev, &ecmd);
578 if (res < 0)
579 return;
580
581 slave_speed = ethtool_cmd_speed(&ecmd);
582 if (slave_speed == 0 || slave_speed == ((__u32) -1))
583 return;
584
585 switch (ecmd.duplex) {
586 case DUPLEX_FULL:
587 case DUPLEX_HALF:
588 break;
589 default:
590 return;
591 }
592
593 slave->speed = slave_speed;
594 slave->duplex = ecmd.duplex;
595
596 return;
597}
598
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613
614
615static int bond_check_dev_link(struct bonding *bond,
616 struct net_device *slave_dev, int reporting)
617{
618 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
619 int (*ioctl)(struct net_device *, struct ifreq *, int);
620 struct ifreq ifr;
621 struct mii_ioctl_data *mii;
622
623 if (!reporting && !netif_running(slave_dev))
624 return 0;
625
626 if (bond->params.use_carrier)
627 return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
628
629
630 if (slave_dev->ethtool_ops->get_link)
631 return slave_dev->ethtool_ops->get_link(slave_dev) ?
632 BMSR_LSTATUS : 0;
633
634
635 ioctl = slave_ops->ndo_do_ioctl;
636 if (ioctl) {
637
638
639
640
641
642
643
644
645
646
647
648
649
650 strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
651 mii = if_mii(&ifr);
652 if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
653 mii->reg_num = MII_BMSR;
654 if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0)
655 return mii->val_out & BMSR_LSTATUS;
656 }
657 }
658
659
660
661
662
663
664
665 return reporting ? -1 : BMSR_LSTATUS;
666}
667
668
669
670
671
672
673static int bond_set_promiscuity(struct bonding *bond, int inc)
674{
675 int err = 0;
676 if (USES_PRIMARY(bond->params.mode)) {
677
678 if (bond->curr_active_slave) {
679 err = dev_set_promiscuity(bond->curr_active_slave->dev,
680 inc);
681 }
682 } else {
683 struct slave *slave;
684 int i;
685 bond_for_each_slave(bond, slave, i) {
686 err = dev_set_promiscuity(slave->dev, inc);
687 if (err)
688 return err;
689 }
690 }
691 return err;
692}
693
694
695
696
697static int bond_set_allmulti(struct bonding *bond, int inc)
698{
699 int err = 0;
700 if (USES_PRIMARY(bond->params.mode)) {
701
702 if (bond->curr_active_slave) {
703 err = dev_set_allmulti(bond->curr_active_slave->dev,
704 inc);
705 }
706 } else {
707 struct slave *slave;
708 int i;
709 bond_for_each_slave(bond, slave, i) {
710 err = dev_set_allmulti(slave->dev, inc);
711 if (err)
712 return err;
713 }
714 }
715 return err;
716}
717
718static void __bond_resend_igmp_join_requests(struct net_device *dev)
719{
720 struct in_device *in_dev;
721
722 in_dev = __in_dev_get_rcu(dev);
723 if (in_dev)
724 ip_mc_rejoin_groups(in_dev);
725}
726
727
728
729
730
731
732static void bond_resend_igmp_join_requests(struct bonding *bond)
733{
734 struct net_device *bond_dev, *vlan_dev, *upper_dev;
735 struct vlan_entry *vlan;
736
737 read_lock(&bond->lock);
738 rcu_read_lock();
739
740 bond_dev = bond->dev;
741
742
743 __bond_resend_igmp_join_requests(bond_dev);
744
745
746
747
748
749 upper_dev = netdev_master_upper_dev_get_rcu(bond_dev);
750 if (upper_dev && upper_dev->priv_flags & IFF_EBRIDGE)
751 __bond_resend_igmp_join_requests(upper_dev);
752
753
754 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
755 vlan_dev = __vlan_find_dev_deep(bond_dev, htons(ETH_P_8021Q),
756 vlan->vlan_id);
757 if (vlan_dev)
758 __bond_resend_igmp_join_requests(vlan_dev);
759 }
760 rcu_read_unlock();
761
762
763
764
765
766 write_lock_bh(&bond->curr_slave_lock);
767 if (bond->igmp_retrans > 1) {
768 bond->igmp_retrans--;
769 queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5);
770 }
771 write_unlock_bh(&bond->curr_slave_lock);
772 read_unlock(&bond->lock);
773}
774
775static void bond_resend_igmp_join_requests_delayed(struct work_struct *work)
776{
777 struct bonding *bond = container_of(work, struct bonding,
778 mcast_work.work);
779
780 bond_resend_igmp_join_requests(bond);
781}
782
783
784
785static void bond_hw_addr_flush(struct net_device *bond_dev,
786 struct net_device *slave_dev)
787{
788 struct bonding *bond = netdev_priv(bond_dev);
789
790 dev_uc_unsync(slave_dev, bond_dev);
791 dev_mc_unsync(slave_dev, bond_dev);
792
793 if (bond->params.mode == BOND_MODE_8023AD) {
794
795 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
796
797 dev_mc_del(slave_dev, lacpdu_multicast);
798 }
799}
800
801
802
803
804
805
806
807
808static void bond_hw_addr_swap(struct bonding *bond, struct slave *new_active,
809 struct slave *old_active)
810{
811 if (old_active) {
812 if (bond->dev->flags & IFF_PROMISC)
813 dev_set_promiscuity(old_active->dev, -1);
814
815 if (bond->dev->flags & IFF_ALLMULTI)
816 dev_set_allmulti(old_active->dev, -1);
817
818 bond_hw_addr_flush(bond->dev, old_active->dev);
819 }
820
821 if (new_active) {
822
823 if (bond->dev->flags & IFF_PROMISC)
824 dev_set_promiscuity(new_active->dev, 1);
825
826 if (bond->dev->flags & IFF_ALLMULTI)
827 dev_set_allmulti(new_active->dev, 1);
828
829 netif_addr_lock_bh(bond->dev);
830 dev_uc_sync(new_active->dev, bond->dev);
831 dev_mc_sync(new_active->dev, bond->dev);
832 netif_addr_unlock_bh(bond->dev);
833 }
834}
835
836
837
838
839
840
841
842
843static void bond_set_dev_addr(struct net_device *bond_dev,
844 struct net_device *slave_dev)
845{
846 pr_debug("bond_dev=%p slave_dev=%p slave_dev->addr_len=%d\n",
847 bond_dev, slave_dev, slave_dev->addr_len);
848 memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
849 bond_dev->addr_assign_type = NET_ADDR_STOLEN;
850 call_netdevice_notifiers(NETDEV_CHANGEADDR, bond_dev);
851}
852
853
854
855
856
857
858
859
860static void bond_do_fail_over_mac(struct bonding *bond,
861 struct slave *new_active,
862 struct slave *old_active)
863 __releases(&bond->curr_slave_lock)
864 __releases(&bond->lock)
865 __acquires(&bond->lock)
866 __acquires(&bond->curr_slave_lock)
867{
868 u8 tmp_mac[ETH_ALEN];
869 struct sockaddr saddr;
870 int rv;
871
872 switch (bond->params.fail_over_mac) {
873 case BOND_FOM_ACTIVE:
874 if (new_active) {
875 write_unlock_bh(&bond->curr_slave_lock);
876 read_unlock(&bond->lock);
877 bond_set_dev_addr(bond->dev, new_active->dev);
878 read_lock(&bond->lock);
879 write_lock_bh(&bond->curr_slave_lock);
880 }
881 break;
882 case BOND_FOM_FOLLOW:
883
884
885
886
887
888 if (!new_active)
889 return;
890
891 write_unlock_bh(&bond->curr_slave_lock);
892 read_unlock(&bond->lock);
893
894 if (old_active) {
895 memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN);
896 memcpy(saddr.sa_data, old_active->dev->dev_addr,
897 ETH_ALEN);
898 saddr.sa_family = new_active->dev->type;
899 } else {
900 memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN);
901 saddr.sa_family = bond->dev->type;
902 }
903
904 rv = dev_set_mac_address(new_active->dev, &saddr);
905 if (rv) {
906 pr_err("%s: Error %d setting MAC of slave %s\n",
907 bond->dev->name, -rv, new_active->dev->name);
908 goto out;
909 }
910
911 if (!old_active)
912 goto out;
913
914 memcpy(saddr.sa_data, tmp_mac, ETH_ALEN);
915 saddr.sa_family = old_active->dev->type;
916
917 rv = dev_set_mac_address(old_active->dev, &saddr);
918 if (rv)
919 pr_err("%s: Error %d setting MAC of slave %s\n",
920 bond->dev->name, -rv, new_active->dev->name);
921out:
922 read_lock(&bond->lock);
923 write_lock_bh(&bond->curr_slave_lock);
924 break;
925 default:
926 pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n",
927 bond->dev->name, bond->params.fail_over_mac);
928 break;
929 }
930
931}
932
933static bool bond_should_change_active(struct bonding *bond)
934{
935 struct slave *prim = bond->primary_slave;
936 struct slave *curr = bond->curr_active_slave;
937
938 if (!prim || !curr || curr->link != BOND_LINK_UP)
939 return true;
940 if (bond->force_primary) {
941 bond->force_primary = false;
942 return true;
943 }
944 if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER &&
945 (prim->speed < curr->speed ||
946 (prim->speed == curr->speed && prim->duplex <= curr->duplex)))
947 return false;
948 if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE)
949 return false;
950 return true;
951}
952
953
954
955
956
957
958
959static struct slave *bond_find_best_slave(struct bonding *bond)
960{
961 struct slave *new_active, *old_active;
962 struct slave *bestslave = NULL;
963 int mintime = bond->params.updelay;
964 int i;
965
966 new_active = bond->curr_active_slave;
967
968 if (!new_active) {
969 if (bond->slave_cnt > 0)
970 new_active = bond->first_slave;
971 else
972 return NULL;
973 }
974
975 if ((bond->primary_slave) &&
976 bond->primary_slave->link == BOND_LINK_UP &&
977 bond_should_change_active(bond)) {
978 new_active = bond->primary_slave;
979 }
980
981
982 old_active = new_active;
983
984 bond_for_each_slave_from(bond, new_active, i, old_active) {
985 if (new_active->link == BOND_LINK_UP) {
986 return new_active;
987 } else if (new_active->link == BOND_LINK_BACK &&
988 IS_UP(new_active->dev)) {
989
990 if (new_active->delay < mintime) {
991 mintime = new_active->delay;
992 bestslave = new_active;
993 }
994 }
995 }
996
997 return bestslave;
998}
999
1000static bool bond_should_notify_peers(struct bonding *bond)
1001{
1002 struct slave *slave = bond->curr_active_slave;
1003
1004 pr_debug("bond_should_notify_peers: bond %s slave %s\n",
1005 bond->dev->name, slave ? slave->dev->name : "NULL");
1006
1007 if (!slave || !bond->send_peer_notif ||
1008 test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
1009 return false;
1010
1011 bond->send_peer_notif--;
1012 return true;
1013}
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
1032{
1033 struct slave *old_active = bond->curr_active_slave;
1034
1035 if (old_active == new_active)
1036 return;
1037
1038 if (new_active) {
1039 new_active->jiffies = jiffies;
1040
1041 if (new_active->link == BOND_LINK_BACK) {
1042 if (USES_PRIMARY(bond->params.mode)) {
1043 pr_info("%s: making interface %s the new active one %d ms earlier.\n",
1044 bond->dev->name, new_active->dev->name,
1045 (bond->params.updelay - new_active->delay) * bond->params.miimon);
1046 }
1047
1048 new_active->delay = 0;
1049 new_active->link = BOND_LINK_UP;
1050
1051 if (bond->params.mode == BOND_MODE_8023AD)
1052 bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
1053
1054 if (bond_is_lb(bond))
1055 bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
1056 } else {
1057 if (USES_PRIMARY(bond->params.mode)) {
1058 pr_info("%s: making interface %s the new active one.\n",
1059 bond->dev->name, new_active->dev->name);
1060 }
1061 }
1062 }
1063
1064 if (USES_PRIMARY(bond->params.mode))
1065 bond_hw_addr_swap(bond, new_active, old_active);
1066
1067 if (bond_is_lb(bond)) {
1068 bond_alb_handle_active_change(bond, new_active);
1069 if (old_active)
1070 bond_set_slave_inactive_flags(old_active);
1071 if (new_active)
1072 bond_set_slave_active_flags(new_active);
1073 } else {
1074 bond->curr_active_slave = new_active;
1075 }
1076
1077 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
1078 if (old_active)
1079 bond_set_slave_inactive_flags(old_active);
1080
1081 if (new_active) {
1082 bool should_notify_peers = false;
1083
1084 bond_set_slave_active_flags(new_active);
1085
1086 if (bond->params.fail_over_mac)
1087 bond_do_fail_over_mac(bond, new_active,
1088 old_active);
1089
1090 if (netif_running(bond->dev)) {
1091 bond->send_peer_notif =
1092 bond->params.num_peer_notif;
1093 should_notify_peers =
1094 bond_should_notify_peers(bond);
1095 }
1096
1097 write_unlock_bh(&bond->curr_slave_lock);
1098 read_unlock(&bond->lock);
1099
1100 call_netdevice_notifiers(NETDEV_BONDING_FAILOVER, bond->dev);
1101 if (should_notify_peers)
1102 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS,
1103 bond->dev);
1104
1105 read_lock(&bond->lock);
1106 write_lock_bh(&bond->curr_slave_lock);
1107 }
1108 }
1109
1110
1111
1112
1113
1114 if (netif_running(bond->dev) && (bond->params.resend_igmp > 0) &&
1115 ((USES_PRIMARY(bond->params.mode) && new_active) ||
1116 bond->params.mode == BOND_MODE_ROUNDROBIN)) {
1117 bond->igmp_retrans = bond->params.resend_igmp;
1118 queue_delayed_work(bond->wq, &bond->mcast_work, 0);
1119 }
1120}
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133void bond_select_active_slave(struct bonding *bond)
1134{
1135 struct slave *best_slave;
1136 int rv;
1137
1138 best_slave = bond_find_best_slave(bond);
1139 if (best_slave != bond->curr_active_slave) {
1140 bond_change_active_slave(bond, best_slave);
1141 rv = bond_set_carrier(bond);
1142 if (!rv)
1143 return;
1144
1145 if (netif_carrier_ok(bond->dev)) {
1146 pr_info("%s: first active interface up!\n",
1147 bond->dev->name);
1148 } else {
1149 pr_info("%s: now running without any active interface !\n",
1150 bond->dev->name);
1151 }
1152 }
1153}
1154
1155
1156
1157
1158
1159
1160
1161
1162static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
1163{
1164 if (bond->first_slave == NULL) {
1165 new_slave->next = new_slave;
1166 new_slave->prev = new_slave;
1167 bond->first_slave = new_slave;
1168 } else {
1169 new_slave->next = bond->first_slave;
1170 new_slave->prev = bond->first_slave->prev;
1171 new_slave->next->prev = new_slave;
1172 new_slave->prev->next = new_slave;
1173 }
1174
1175 bond->slave_cnt++;
1176}
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188static void bond_detach_slave(struct bonding *bond, struct slave *slave)
1189{
1190 if (slave->next)
1191 slave->next->prev = slave->prev;
1192
1193 if (slave->prev)
1194 slave->prev->next = slave->next;
1195
1196 if (bond->first_slave == slave) {
1197 if (bond->slave_cnt > 1) {
1198 bond->first_slave = slave->next;
1199 } else {
1200 bond->first_slave = NULL;
1201 }
1202 }
1203
1204 slave->next = NULL;
1205 slave->prev = NULL;
1206 bond->slave_cnt--;
1207}
1208
1209#ifdef CONFIG_NET_POLL_CONTROLLER
1210static inline int slave_enable_netpoll(struct slave *slave)
1211{
1212 struct netpoll *np;
1213 int err = 0;
1214
1215 np = kzalloc(sizeof(*np), GFP_ATOMIC);
1216 err = -ENOMEM;
1217 if (!np)
1218 goto out;
1219
1220 err = __netpoll_setup(np, slave->dev, GFP_ATOMIC);
1221 if (err) {
1222 kfree(np);
1223 goto out;
1224 }
1225 slave->np = np;
1226out:
1227 return err;
1228}
1229static inline void slave_disable_netpoll(struct slave *slave)
1230{
1231 struct netpoll *np = slave->np;
1232
1233 if (!np)
1234 return;
1235
1236 slave->np = NULL;
1237 __netpoll_free_async(np);
1238}
1239static inline bool slave_dev_support_netpoll(struct net_device *slave_dev)
1240{
1241 if (slave_dev->priv_flags & IFF_DISABLE_NETPOLL)
1242 return false;
1243 if (!slave_dev->netdev_ops->ndo_poll_controller)
1244 return false;
1245 return true;
1246}
1247
1248static void bond_poll_controller(struct net_device *bond_dev)
1249{
1250}
1251
1252static void __bond_netpoll_cleanup(struct bonding *bond)
1253{
1254 struct slave *slave;
1255 int i;
1256
1257 bond_for_each_slave(bond, slave, i)
1258 if (IS_UP(slave->dev))
1259 slave_disable_netpoll(slave);
1260}
1261static void bond_netpoll_cleanup(struct net_device *bond_dev)
1262{
1263 struct bonding *bond = netdev_priv(bond_dev);
1264
1265 read_lock(&bond->lock);
1266 __bond_netpoll_cleanup(bond);
1267 read_unlock(&bond->lock);
1268}
1269
1270static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni, gfp_t gfp)
1271{
1272 struct bonding *bond = netdev_priv(dev);
1273 struct slave *slave;
1274 int i, err = 0;
1275
1276 read_lock(&bond->lock);
1277 bond_for_each_slave(bond, slave, i) {
1278 err = slave_enable_netpoll(slave);
1279 if (err) {
1280 __bond_netpoll_cleanup(bond);
1281 break;
1282 }
1283 }
1284 read_unlock(&bond->lock);
1285 return err;
1286}
1287
1288static struct netpoll_info *bond_netpoll_info(struct bonding *bond)
1289{
1290 return bond->dev->npinfo;
1291}
1292
1293#else
1294static inline int slave_enable_netpoll(struct slave *slave)
1295{
1296 return 0;
1297}
1298static inline void slave_disable_netpoll(struct slave *slave)
1299{
1300}
1301static void bond_netpoll_cleanup(struct net_device *bond_dev)
1302{
1303}
1304#endif
1305
1306
1307
1308static netdev_features_t bond_fix_features(struct net_device *dev,
1309 netdev_features_t features)
1310{
1311 struct slave *slave;
1312 struct bonding *bond = netdev_priv(dev);
1313 netdev_features_t mask;
1314 int i;
1315
1316 read_lock(&bond->lock);
1317
1318 if (!bond->first_slave) {
1319
1320 features |= NETIF_F_VLAN_CHALLENGED;
1321 goto out;
1322 }
1323
1324 mask = features;
1325 features &= ~NETIF_F_ONE_FOR_ALL;
1326 features |= NETIF_F_ALL_FOR_ALL;
1327
1328 bond_for_each_slave(bond, slave, i) {
1329 features = netdev_increment_features(features,
1330 slave->dev->features,
1331 mask);
1332 }
1333 features = netdev_add_tso_features(features, mask);
1334
1335out:
1336 read_unlock(&bond->lock);
1337 return features;
1338}
1339
1340#define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
1341 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1342 NETIF_F_HIGHDMA | NETIF_F_LRO)
1343
1344static void bond_compute_features(struct bonding *bond)
1345{
1346 struct slave *slave;
1347 struct net_device *bond_dev = bond->dev;
1348 netdev_features_t vlan_features = BOND_VLAN_FEATURES;
1349 unsigned short max_hard_header_len = ETH_HLEN;
1350 unsigned int gso_max_size = GSO_MAX_SIZE;
1351 u16 gso_max_segs = GSO_MAX_SEGS;
1352 int i;
1353 unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
1354
1355 read_lock(&bond->lock);
1356
1357 if (!bond->first_slave)
1358 goto done;
1359
1360 bond_for_each_slave(bond, slave, i) {
1361 vlan_features = netdev_increment_features(vlan_features,
1362 slave->dev->vlan_features, BOND_VLAN_FEATURES);
1363
1364 dst_release_flag &= slave->dev->priv_flags;
1365 if (slave->dev->hard_header_len > max_hard_header_len)
1366 max_hard_header_len = slave->dev->hard_header_len;
1367
1368 gso_max_size = min(gso_max_size, slave->dev->gso_max_size);
1369 gso_max_segs = min(gso_max_segs, slave->dev->gso_max_segs);
1370 }
1371
1372done:
1373 bond_dev->vlan_features = vlan_features;
1374 bond_dev->hard_header_len = max_hard_header_len;
1375 bond_dev->gso_max_segs = gso_max_segs;
1376 netif_set_gso_max_size(bond_dev, gso_max_size);
1377
1378 flags = bond_dev->priv_flags & ~IFF_XMIT_DST_RELEASE;
1379 bond_dev->priv_flags = flags | dst_release_flag;
1380
1381 read_unlock(&bond->lock);
1382
1383 netdev_change_features(bond_dev);
1384}
1385
1386static void bond_setup_by_slave(struct net_device *bond_dev,
1387 struct net_device *slave_dev)
1388{
1389 bond_dev->header_ops = slave_dev->header_ops;
1390
1391 bond_dev->type = slave_dev->type;
1392 bond_dev->hard_header_len = slave_dev->hard_header_len;
1393 bond_dev->addr_len = slave_dev->addr_len;
1394
1395 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1396 slave_dev->addr_len);
1397}
1398
1399
1400
1401
1402static bool bond_should_deliver_exact_match(struct sk_buff *skb,
1403 struct slave *slave,
1404 struct bonding *bond)
1405{
1406 if (bond_is_slave_inactive(slave)) {
1407 if (bond->params.mode == BOND_MODE_ALB &&
1408 skb->pkt_type != PACKET_BROADCAST &&
1409 skb->pkt_type != PACKET_MULTICAST)
1410 return false;
1411 return true;
1412 }
1413 return false;
1414}
1415
1416static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb)
1417{
1418 struct sk_buff *skb = *pskb;
1419 struct slave *slave;
1420 struct bonding *bond;
1421 int (*recv_probe)(const struct sk_buff *, struct bonding *,
1422 struct slave *);
1423 int ret = RX_HANDLER_ANOTHER;
1424
1425 skb = skb_share_check(skb, GFP_ATOMIC);
1426 if (unlikely(!skb))
1427 return RX_HANDLER_CONSUMED;
1428
1429 *pskb = skb;
1430
1431 slave = bond_slave_get_rcu(skb->dev);
1432 bond = slave->bond;
1433
1434 if (bond->params.arp_interval)
1435 slave->dev->last_rx = jiffies;
1436
1437 recv_probe = ACCESS_ONCE(bond->recv_probe);
1438 if (recv_probe) {
1439 ret = recv_probe(skb, bond, slave);
1440 if (ret == RX_HANDLER_CONSUMED) {
1441 consume_skb(skb);
1442 return ret;
1443 }
1444 }
1445
1446 if (bond_should_deliver_exact_match(skb, slave, bond)) {
1447 return RX_HANDLER_EXACT;
1448 }
1449
1450 skb->dev = bond->dev;
1451
1452 if (bond->params.mode == BOND_MODE_ALB &&
1453 bond->dev->priv_flags & IFF_BRIDGE_PORT &&
1454 skb->pkt_type == PACKET_HOST) {
1455
1456 if (unlikely(skb_cow_head(skb,
1457 skb->data - skb_mac_header(skb)))) {
1458 kfree_skb(skb);
1459 return RX_HANDLER_CONSUMED;
1460 }
1461 memcpy(eth_hdr(skb)->h_dest, bond->dev->dev_addr, ETH_ALEN);
1462 }
1463
1464 return ret;
1465}
1466
1467static int bond_master_upper_dev_link(struct net_device *bond_dev,
1468 struct net_device *slave_dev)
1469{
1470 int err;
1471
1472 err = netdev_master_upper_dev_link(slave_dev, bond_dev);
1473 if (err)
1474 return err;
1475 slave_dev->flags |= IFF_SLAVE;
1476 rtmsg_ifinfo(RTM_NEWLINK, slave_dev, IFF_SLAVE);
1477 return 0;
1478}
1479
1480static void bond_upper_dev_unlink(struct net_device *bond_dev,
1481 struct net_device *slave_dev)
1482{
1483 netdev_upper_dev_unlink(slave_dev, bond_dev);
1484 slave_dev->flags &= ~IFF_SLAVE;
1485 rtmsg_ifinfo(RTM_NEWLINK, slave_dev, IFF_SLAVE);
1486}
1487
1488
1489int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
1490{
1491 struct bonding *bond = netdev_priv(bond_dev);
1492 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1493 struct slave *new_slave = NULL;
1494 struct sockaddr addr;
1495 int link_reporting;
1496 int res = 0, i;
1497
1498 if (!bond->params.use_carrier &&
1499 slave_dev->ethtool_ops->get_link == NULL &&
1500 slave_ops->ndo_do_ioctl == NULL) {
1501 pr_warning("%s: Warning: no link monitoring support for %s\n",
1502 bond_dev->name, slave_dev->name);
1503 }
1504
1505
1506 if (slave_dev->flags & IFF_SLAVE) {
1507 pr_debug("Error, Device was already enslaved\n");
1508 return -EBUSY;
1509 }
1510
1511
1512
1513 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
1514 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1515 if (vlan_uses_dev(bond_dev)) {
1516 pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1517 bond_dev->name, slave_dev->name, bond_dev->name);
1518 return -EPERM;
1519 } else {
1520 pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1521 bond_dev->name, slave_dev->name,
1522 slave_dev->name, bond_dev->name);
1523 }
1524 } else {
1525 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1526 }
1527
1528
1529
1530
1531
1532
1533
1534 if ((slave_dev->flags & IFF_UP)) {
1535 pr_err("%s is up. This may be due to an out of date ifenslave.\n",
1536 slave_dev->name);
1537 res = -EPERM;
1538 goto err_undo_flags;
1539 }
1540
1541
1542
1543
1544
1545
1546
1547
1548 if (bond->slave_cnt == 0) {
1549 if (bond_dev->type != slave_dev->type) {
1550 pr_debug("%s: change device type from %d to %d\n",
1551 bond_dev->name,
1552 bond_dev->type, slave_dev->type);
1553
1554 res = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE,
1555 bond_dev);
1556 res = notifier_to_errno(res);
1557 if (res) {
1558 pr_err("%s: refused to change device type\n",
1559 bond_dev->name);
1560 res = -EBUSY;
1561 goto err_undo_flags;
1562 }
1563
1564
1565 dev_uc_flush(bond_dev);
1566 dev_mc_flush(bond_dev);
1567
1568 if (slave_dev->type != ARPHRD_ETHER)
1569 bond_setup_by_slave(bond_dev, slave_dev);
1570 else {
1571 ether_setup(bond_dev);
1572 bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1573 }
1574
1575 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE,
1576 bond_dev);
1577 }
1578 } else if (bond_dev->type != slave_dev->type) {
1579 pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n",
1580 slave_dev->name,
1581 slave_dev->type, bond_dev->type);
1582 res = -EINVAL;
1583 goto err_undo_flags;
1584 }
1585
1586 if (slave_ops->ndo_set_mac_address == NULL) {
1587 if (bond->slave_cnt == 0) {
1588 pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.",
1589 bond_dev->name);
1590 bond->params.fail_over_mac = BOND_FOM_ACTIVE;
1591 } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
1592 pr_err("%s: Error: The slave device specified does not support setting the MAC address, but fail_over_mac is not set to active.\n",
1593 bond_dev->name);
1594 res = -EOPNOTSUPP;
1595 goto err_undo_flags;
1596 }
1597 }
1598
1599 call_netdevice_notifiers(NETDEV_JOIN, slave_dev);
1600
1601
1602
1603 if (!bond->slave_cnt && bond->dev->addr_assign_type == NET_ADDR_RANDOM)
1604 bond_set_dev_addr(bond->dev, slave_dev);
1605
1606 new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
1607 if (!new_slave) {
1608 res = -ENOMEM;
1609 goto err_undo_flags;
1610 }
1611
1612
1613
1614
1615
1616 new_slave->queue_id = 0;
1617
1618
1619 new_slave->original_mtu = slave_dev->mtu;
1620 res = dev_set_mtu(slave_dev, bond->dev->mtu);
1621 if (res) {
1622 pr_debug("Error %d calling dev_set_mtu\n", res);
1623 goto err_free;
1624 }
1625
1626
1627
1628
1629
1630
1631 memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
1632
1633 if (!bond->params.fail_over_mac) {
1634
1635
1636
1637
1638 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1639 addr.sa_family = slave_dev->type;
1640 res = dev_set_mac_address(slave_dev, &addr);
1641 if (res) {
1642 pr_debug("Error %d calling set_mac_address\n", res);
1643 goto err_restore_mtu;
1644 }
1645 }
1646
1647 res = bond_master_upper_dev_link(bond_dev, slave_dev);
1648 if (res) {
1649 pr_debug("Error %d calling bond_master_upper_dev_link\n", res);
1650 goto err_restore_mac;
1651 }
1652
1653
1654 res = dev_open(slave_dev);
1655 if (res) {
1656 pr_debug("Opening slave %s failed\n", slave_dev->name);
1657 goto err_unset_master;
1658 }
1659
1660 new_slave->bond = bond;
1661 new_slave->dev = slave_dev;
1662 slave_dev->priv_flags |= IFF_BONDING;
1663
1664 if (bond_is_lb(bond)) {
1665
1666
1667
1668 res = bond_alb_init_slave(bond, new_slave);
1669 if (res)
1670 goto err_close;
1671 }
1672
1673
1674
1675
1676 if (!USES_PRIMARY(bond->params.mode)) {
1677
1678 if (bond_dev->flags & IFF_PROMISC) {
1679 res = dev_set_promiscuity(slave_dev, 1);
1680 if (res)
1681 goto err_close;
1682 }
1683
1684
1685 if (bond_dev->flags & IFF_ALLMULTI) {
1686 res = dev_set_allmulti(slave_dev, 1);
1687 if (res)
1688 goto err_close;
1689 }
1690
1691 netif_addr_lock_bh(bond_dev);
1692
1693 dev_mc_sync_multiple(slave_dev, bond_dev);
1694 dev_uc_sync_multiple(slave_dev, bond_dev);
1695
1696 netif_addr_unlock_bh(bond_dev);
1697 }
1698
1699 if (bond->params.mode == BOND_MODE_8023AD) {
1700
1701 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1702
1703 dev_mc_add(slave_dev, lacpdu_multicast);
1704 }
1705
1706 bond_add_vlans_on_slave(bond, slave_dev);
1707
1708 write_lock_bh(&bond->lock);
1709
1710 bond_attach_slave(bond, new_slave);
1711
1712 new_slave->delay = 0;
1713 new_slave->link_failure_count = 0;
1714
1715 write_unlock_bh(&bond->lock);
1716
1717 bond_compute_features(bond);
1718
1719 bond_update_speed_duplex(new_slave);
1720
1721 read_lock(&bond->lock);
1722
1723 new_slave->last_arp_rx = jiffies -
1724 (msecs_to_jiffies(bond->params.arp_interval) + 1);
1725 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1726 new_slave->target_last_arp_rx[i] = new_slave->last_arp_rx;
1727
1728 if (bond->params.miimon && !bond->params.use_carrier) {
1729 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1730
1731 if ((link_reporting == -1) && !bond->params.arp_interval) {
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741 pr_warning("%s: Warning: MII and ETHTOOL support not available for interface %s, and arp_interval/arp_ip_target module parameters not specified, thus bonding will not detect link failures! see bonding.txt for details.\n",
1742 bond_dev->name, slave_dev->name);
1743 } else if (link_reporting == -1) {
1744
1745 pr_warning("%s: Warning: can't get link status from interface %s; the network driver associated with this interface does not support MII or ETHTOOL link status reporting, thus miimon has no effect on this interface.\n",
1746 bond_dev->name, slave_dev->name);
1747 }
1748 }
1749
1750
1751 if (bond->params.miimon) {
1752 if (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS) {
1753 if (bond->params.updelay) {
1754 new_slave->link = BOND_LINK_BACK;
1755 new_slave->delay = bond->params.updelay;
1756 } else {
1757 new_slave->link = BOND_LINK_UP;
1758 }
1759 } else {
1760 new_slave->link = BOND_LINK_DOWN;
1761 }
1762 } else if (bond->params.arp_interval) {
1763 new_slave->link = (netif_carrier_ok(slave_dev) ?
1764 BOND_LINK_UP : BOND_LINK_DOWN);
1765 } else {
1766 new_slave->link = BOND_LINK_UP;
1767 }
1768
1769 if (new_slave->link != BOND_LINK_DOWN)
1770 new_slave->jiffies = jiffies;
1771 pr_debug("Initial state of slave_dev is BOND_LINK_%s\n",
1772 new_slave->link == BOND_LINK_DOWN ? "DOWN" :
1773 (new_slave->link == BOND_LINK_UP ? "UP" : "BACK"));
1774
1775 if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
1776
1777 if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
1778 bond->primary_slave = new_slave;
1779 bond->force_primary = true;
1780 }
1781 }
1782
1783 write_lock_bh(&bond->curr_slave_lock);
1784
1785 switch (bond->params.mode) {
1786 case BOND_MODE_ACTIVEBACKUP:
1787 bond_set_slave_inactive_flags(new_slave);
1788 bond_select_active_slave(bond);
1789 break;
1790 case BOND_MODE_8023AD:
1791
1792
1793
1794
1795 bond_set_slave_inactive_flags(new_slave);
1796
1797 if (bond->slave_cnt == 1) {
1798 SLAVE_AD_INFO(new_slave).id = 1;
1799
1800
1801
1802 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL);
1803 } else {
1804 SLAVE_AD_INFO(new_slave).id =
1805 SLAVE_AD_INFO(new_slave->prev).id + 1;
1806 }
1807
1808 bond_3ad_bind_slave(new_slave);
1809 break;
1810 case BOND_MODE_TLB:
1811 case BOND_MODE_ALB:
1812 bond_set_active_slave(new_slave);
1813 bond_set_slave_inactive_flags(new_slave);
1814 bond_select_active_slave(bond);
1815 break;
1816 default:
1817 pr_debug("This slave is always active in trunk mode\n");
1818
1819
1820 bond_set_active_slave(new_slave);
1821
1822
1823
1824
1825
1826 if (!bond->curr_active_slave && new_slave->link == BOND_LINK_UP)
1827 bond->curr_active_slave = new_slave;
1828
1829 break;
1830 }
1831
1832 write_unlock_bh(&bond->curr_slave_lock);
1833
1834 bond_set_carrier(bond);
1835
1836#ifdef CONFIG_NET_POLL_CONTROLLER
1837 slave_dev->npinfo = bond_netpoll_info(bond);
1838 if (slave_dev->npinfo) {
1839 if (slave_enable_netpoll(new_slave)) {
1840 read_unlock(&bond->lock);
1841 pr_info("Error, %s: master_dev is using netpoll, "
1842 "but new slave device does not support netpoll.\n",
1843 bond_dev->name);
1844 res = -EBUSY;
1845 goto err_detach;
1846 }
1847 }
1848#endif
1849
1850 read_unlock(&bond->lock);
1851
1852 res = bond_create_slave_symlinks(bond_dev, slave_dev);
1853 if (res)
1854 goto err_detach;
1855
1856 res = netdev_rx_handler_register(slave_dev, bond_handle_frame,
1857 new_slave);
1858 if (res) {
1859 pr_debug("Error %d calling netdev_rx_handler_register\n", res);
1860 goto err_dest_symlinks;
1861 }
1862
1863 pr_info("%s: enslaving %s as a%s interface with a%s link.\n",
1864 bond_dev->name, slave_dev->name,
1865 bond_is_active_slave(new_slave) ? "n active" : " backup",
1866 new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
1867
1868
1869 return 0;
1870
1871
1872err_dest_symlinks:
1873 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1874
1875err_detach:
1876 if (!USES_PRIMARY(bond->params.mode))
1877 bond_hw_addr_flush(bond_dev, slave_dev);
1878
1879 bond_del_vlans_from_slave(bond, slave_dev);
1880 write_lock_bh(&bond->lock);
1881 bond_detach_slave(bond, new_slave);
1882 if (bond->primary_slave == new_slave)
1883 bond->primary_slave = NULL;
1884 if (bond->curr_active_slave == new_slave) {
1885 bond_change_active_slave(bond, NULL);
1886 write_unlock_bh(&bond->lock);
1887 read_lock(&bond->lock);
1888 write_lock_bh(&bond->curr_slave_lock);
1889 bond_select_active_slave(bond);
1890 write_unlock_bh(&bond->curr_slave_lock);
1891 read_unlock(&bond->lock);
1892 } else {
1893 write_unlock_bh(&bond->lock);
1894 }
1895 slave_disable_netpoll(new_slave);
1896
1897err_close:
1898 slave_dev->priv_flags &= ~IFF_BONDING;
1899 dev_close(slave_dev);
1900
1901err_unset_master:
1902 bond_upper_dev_unlink(bond_dev, slave_dev);
1903
1904err_restore_mac:
1905 if (!bond->params.fail_over_mac) {
1906
1907
1908
1909
1910 memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
1911 addr.sa_family = slave_dev->type;
1912 dev_set_mac_address(slave_dev, &addr);
1913 }
1914
1915err_restore_mtu:
1916 dev_set_mtu(slave_dev, new_slave->original_mtu);
1917
1918err_free:
1919 kfree(new_slave);
1920
1921err_undo_flags:
1922 bond_compute_features(bond);
1923
1924 if (bond->slave_cnt == 0 &&
1925 ether_addr_equal(bond_dev->dev_addr, slave_dev->dev_addr))
1926 eth_hw_addr_random(bond_dev);
1927
1928 return res;
1929}
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943static int __bond_release_one(struct net_device *bond_dev,
1944 struct net_device *slave_dev,
1945 bool all)
1946{
1947 struct bonding *bond = netdev_priv(bond_dev);
1948 struct slave *slave, *oldcurrent;
1949 struct sockaddr addr;
1950 netdev_features_t old_features = bond_dev->features;
1951
1952
1953 if (!(slave_dev->flags & IFF_SLAVE) ||
1954 !netdev_has_upper_dev(slave_dev, bond_dev)) {
1955 pr_err("%s: Error: cannot release %s.\n",
1956 bond_dev->name, slave_dev->name);
1957 return -EINVAL;
1958 }
1959
1960 block_netpoll_tx();
1961 write_lock_bh(&bond->lock);
1962
1963 slave = bond_get_slave_by_dev(bond, slave_dev);
1964 if (!slave) {
1965
1966 pr_info("%s: %s not enslaved\n",
1967 bond_dev->name, slave_dev->name);
1968 write_unlock_bh(&bond->lock);
1969 unblock_netpoll_tx();
1970 return -EINVAL;
1971 }
1972
1973 write_unlock_bh(&bond->lock);
1974
1975
1976
1977 netdev_rx_handler_unregister(slave_dev);
1978 write_lock_bh(&bond->lock);
1979
1980 if (!all && !bond->params.fail_over_mac) {
1981 if (ether_addr_equal(bond_dev->dev_addr, slave->perm_hwaddr) &&
1982 bond->slave_cnt > 1)
1983 pr_warning("%s: Warning: the permanent HWaddr of %s - %pM - is still in use by %s. Set the HWaddr of %s to a different address to avoid conflicts.\n",
1984 bond_dev->name, slave_dev->name,
1985 slave->perm_hwaddr,
1986 bond_dev->name, slave_dev->name);
1987 }
1988
1989
1990 if (bond->params.mode == BOND_MODE_8023AD) {
1991
1992
1993
1994 bond_3ad_unbind_slave(slave);
1995 }
1996
1997 pr_info("%s: releasing %s interface %s\n",
1998 bond_dev->name,
1999 bond_is_active_slave(slave) ? "active" : "backup",
2000 slave_dev->name);
2001
2002 oldcurrent = bond->curr_active_slave;
2003
2004 bond->current_arp_slave = NULL;
2005
2006
2007 bond_detach_slave(bond, slave);
2008
2009 if (bond->primary_slave == slave)
2010 bond->primary_slave = NULL;
2011
2012 if (oldcurrent == slave)
2013 bond_change_active_slave(bond, NULL);
2014
2015 if (bond_is_lb(bond)) {
2016
2017
2018
2019
2020
2021 write_unlock_bh(&bond->lock);
2022 bond_alb_deinit_slave(bond, slave);
2023 write_lock_bh(&bond->lock);
2024 }
2025
2026 if (all) {
2027 bond->curr_active_slave = NULL;
2028 } else if (oldcurrent == slave) {
2029
2030
2031
2032
2033
2034 write_unlock_bh(&bond->lock);
2035 read_lock(&bond->lock);
2036 write_lock_bh(&bond->curr_slave_lock);
2037
2038 bond_select_active_slave(bond);
2039
2040 write_unlock_bh(&bond->curr_slave_lock);
2041 read_unlock(&bond->lock);
2042 write_lock_bh(&bond->lock);
2043 }
2044
2045 if (bond->slave_cnt == 0) {
2046 bond_set_carrier(bond);
2047 eth_hw_addr_random(bond_dev);
2048
2049 if (bond_vlan_used(bond)) {
2050 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2051 bond_dev->name, bond_dev->name);
2052 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2053 bond_dev->name);
2054 }
2055 }
2056
2057 write_unlock_bh(&bond->lock);
2058 unblock_netpoll_tx();
2059
2060 if (bond->slave_cnt == 0) {
2061 call_netdevice_notifiers(NETDEV_CHANGEADDR, bond->dev);
2062 call_netdevice_notifiers(NETDEV_RELEASE, bond->dev);
2063 }
2064
2065 bond_compute_features(bond);
2066 if (!(bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
2067 (old_features & NETIF_F_VLAN_CHALLENGED))
2068 pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n",
2069 bond_dev->name, slave_dev->name, bond_dev->name);
2070
2071
2072 bond_destroy_slave_symlinks(bond_dev, slave_dev);
2073
2074 bond_del_vlans_from_slave(bond, slave_dev);
2075
2076
2077
2078
2079 if (!USES_PRIMARY(bond->params.mode)) {
2080
2081 if (bond_dev->flags & IFF_PROMISC)
2082 dev_set_promiscuity(slave_dev, -1);
2083
2084
2085 if (bond_dev->flags & IFF_ALLMULTI)
2086 dev_set_allmulti(slave_dev, -1);
2087
2088 bond_hw_addr_flush(bond_dev, slave_dev);
2089 }
2090
2091 bond_upper_dev_unlink(bond_dev, slave_dev);
2092
2093 slave_disable_netpoll(slave);
2094
2095
2096 dev_close(slave_dev);
2097
2098 if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
2099
2100 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
2101 addr.sa_family = slave_dev->type;
2102 dev_set_mac_address(slave_dev, &addr);
2103 }
2104
2105 dev_set_mtu(slave_dev, slave->original_mtu);
2106
2107 slave_dev->priv_flags &= ~IFF_BONDING;
2108
2109 kfree(slave);
2110
2111 return 0;
2112}
2113
2114
2115int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
2116{
2117 return __bond_release_one(bond_dev, slave_dev, false);
2118}
2119
2120
2121
2122
2123
2124static int bond_release_and_destroy(struct net_device *bond_dev,
2125 struct net_device *slave_dev)
2126{
2127 struct bonding *bond = netdev_priv(bond_dev);
2128 int ret;
2129
2130 ret = bond_release(bond_dev, slave_dev);
2131 if ((ret == 0) && (bond->slave_cnt == 0)) {
2132 bond_dev->priv_flags |= IFF_DISABLE_NETPOLL;
2133 pr_info("%s: destroying bond %s.\n",
2134 bond_dev->name, bond_dev->name);
2135 unregister_netdevice(bond_dev);
2136 }
2137 return ret;
2138}
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
2152{
2153 struct bonding *bond = netdev_priv(bond_dev);
2154 struct slave *old_active = NULL;
2155 struct slave *new_active = NULL;
2156 int res = 0;
2157
2158 if (!USES_PRIMARY(bond->params.mode))
2159 return -EINVAL;
2160
2161
2162 if (!(slave_dev->flags & IFF_SLAVE) ||
2163 !netdev_has_upper_dev(slave_dev, bond_dev))
2164 return -EINVAL;
2165
2166 read_lock(&bond->lock);
2167
2168 read_lock(&bond->curr_slave_lock);
2169 old_active = bond->curr_active_slave;
2170 read_unlock(&bond->curr_slave_lock);
2171
2172 new_active = bond_get_slave_by_dev(bond, slave_dev);
2173
2174
2175
2176
2177 if (new_active && (new_active == old_active)) {
2178 read_unlock(&bond->lock);
2179 return 0;
2180 }
2181
2182 if ((new_active) &&
2183 (old_active) &&
2184 (new_active->link == BOND_LINK_UP) &&
2185 IS_UP(new_active->dev)) {
2186 block_netpoll_tx();
2187 write_lock_bh(&bond->curr_slave_lock);
2188 bond_change_active_slave(bond, new_active);
2189 write_unlock_bh(&bond->curr_slave_lock);
2190 unblock_netpoll_tx();
2191 } else
2192 res = -EINVAL;
2193
2194 read_unlock(&bond->lock);
2195
2196 return res;
2197}
2198
2199static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2200{
2201 struct bonding *bond = netdev_priv(bond_dev);
2202
2203 info->bond_mode = bond->params.mode;
2204 info->miimon = bond->params.miimon;
2205
2206 read_lock(&bond->lock);
2207 info->num_slaves = bond->slave_cnt;
2208 read_unlock(&bond->lock);
2209
2210 return 0;
2211}
2212
2213static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2214{
2215 struct bonding *bond = netdev_priv(bond_dev);
2216 struct slave *slave;
2217 int i, res = -ENODEV;
2218
2219 read_lock(&bond->lock);
2220
2221 bond_for_each_slave(bond, slave, i) {
2222 if (i == (int)info->slave_id) {
2223 res = 0;
2224 strcpy(info->slave_name, slave->dev->name);
2225 info->link = slave->link;
2226 info->state = bond_slave_state(slave);
2227 info->link_failure_count = slave->link_failure_count;
2228 break;
2229 }
2230 }
2231
2232 read_unlock(&bond->lock);
2233
2234 return res;
2235}
2236
2237
2238
2239
2240static int bond_miimon_inspect(struct bonding *bond)
2241{
2242 struct slave *slave;
2243 int i, link_state, commit = 0;
2244 bool ignore_updelay;
2245
2246 ignore_updelay = !bond->curr_active_slave ? true : false;
2247
2248 bond_for_each_slave(bond, slave, i) {
2249 slave->new_link = BOND_LINK_NOCHANGE;
2250
2251 link_state = bond_check_dev_link(bond, slave->dev, 0);
2252
2253 switch (slave->link) {
2254 case BOND_LINK_UP:
2255 if (link_state)
2256 continue;
2257
2258 slave->link = BOND_LINK_FAIL;
2259 slave->delay = bond->params.downdelay;
2260 if (slave->delay) {
2261 pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n",
2262 bond->dev->name,
2263 (bond->params.mode ==
2264 BOND_MODE_ACTIVEBACKUP) ?
2265 (bond_is_active_slave(slave) ?
2266 "active " : "backup ") : "",
2267 slave->dev->name,
2268 bond->params.downdelay * bond->params.miimon);
2269 }
2270
2271 case BOND_LINK_FAIL:
2272 if (link_state) {
2273
2274
2275
2276 slave->link = BOND_LINK_UP;
2277 slave->jiffies = jiffies;
2278 pr_info("%s: link status up again after %d ms for interface %s.\n",
2279 bond->dev->name,
2280 (bond->params.downdelay - slave->delay) *
2281 bond->params.miimon,
2282 slave->dev->name);
2283 continue;
2284 }
2285
2286 if (slave->delay <= 0) {
2287 slave->new_link = BOND_LINK_DOWN;
2288 commit++;
2289 continue;
2290 }
2291
2292 slave->delay--;
2293 break;
2294
2295 case BOND_LINK_DOWN:
2296 if (!link_state)
2297 continue;
2298
2299 slave->link = BOND_LINK_BACK;
2300 slave->delay = bond->params.updelay;
2301
2302 if (slave->delay) {
2303 pr_info("%s: link status up for interface %s, enabling it in %d ms.\n",
2304 bond->dev->name, slave->dev->name,
2305 ignore_updelay ? 0 :
2306 bond->params.updelay *
2307 bond->params.miimon);
2308 }
2309
2310 case BOND_LINK_BACK:
2311 if (!link_state) {
2312 slave->link = BOND_LINK_DOWN;
2313 pr_info("%s: link status down again after %d ms for interface %s.\n",
2314 bond->dev->name,
2315 (bond->params.updelay - slave->delay) *
2316 bond->params.miimon,
2317 slave->dev->name);
2318
2319 continue;
2320 }
2321
2322 if (ignore_updelay)
2323 slave->delay = 0;
2324
2325 if (slave->delay <= 0) {
2326 slave->new_link = BOND_LINK_UP;
2327 commit++;
2328 ignore_updelay = false;
2329 continue;
2330 }
2331
2332 slave->delay--;
2333 break;
2334 }
2335 }
2336
2337 return commit;
2338}
2339
2340static void bond_miimon_commit(struct bonding *bond)
2341{
2342 struct slave *slave;
2343 int i;
2344
2345 bond_for_each_slave(bond, slave, i) {
2346 switch (slave->new_link) {
2347 case BOND_LINK_NOCHANGE:
2348 continue;
2349
2350 case BOND_LINK_UP:
2351 slave->link = BOND_LINK_UP;
2352 slave->jiffies = jiffies;
2353
2354 if (bond->params.mode == BOND_MODE_8023AD) {
2355
2356 bond_set_backup_slave(slave);
2357 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2358
2359 bond_set_active_slave(slave);
2360 } else if (slave != bond->primary_slave) {
2361
2362 bond_set_backup_slave(slave);
2363 }
2364
2365 pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n",
2366 bond->dev->name, slave->dev->name,
2367 slave->speed == SPEED_UNKNOWN ? 0 : slave->speed,
2368 slave->duplex ? "full" : "half");
2369
2370
2371 if (bond->params.mode == BOND_MODE_8023AD)
2372 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
2373
2374 if (bond_is_lb(bond))
2375 bond_alb_handle_link_change(bond, slave,
2376 BOND_LINK_UP);
2377
2378 if (!bond->curr_active_slave ||
2379 (slave == bond->primary_slave))
2380 goto do_failover;
2381
2382 continue;
2383
2384 case BOND_LINK_DOWN:
2385 if (slave->link_failure_count < UINT_MAX)
2386 slave->link_failure_count++;
2387
2388 slave->link = BOND_LINK_DOWN;
2389
2390 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP ||
2391 bond->params.mode == BOND_MODE_8023AD)
2392 bond_set_slave_inactive_flags(slave);
2393
2394 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2395 bond->dev->name, slave->dev->name);
2396
2397 if (bond->params.mode == BOND_MODE_8023AD)
2398 bond_3ad_handle_link_change(slave,
2399 BOND_LINK_DOWN);
2400
2401 if (bond_is_lb(bond))
2402 bond_alb_handle_link_change(bond, slave,
2403 BOND_LINK_DOWN);
2404
2405 if (slave == bond->curr_active_slave)
2406 goto do_failover;
2407
2408 continue;
2409
2410 default:
2411 pr_err("%s: invalid new link %d on slave %s\n",
2412 bond->dev->name, slave->new_link,
2413 slave->dev->name);
2414 slave->new_link = BOND_LINK_NOCHANGE;
2415
2416 continue;
2417 }
2418
2419do_failover:
2420 ASSERT_RTNL();
2421 block_netpoll_tx();
2422 write_lock_bh(&bond->curr_slave_lock);
2423 bond_select_active_slave(bond);
2424 write_unlock_bh(&bond->curr_slave_lock);
2425 unblock_netpoll_tx();
2426 }
2427
2428 bond_set_carrier(bond);
2429}
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439void bond_mii_monitor(struct work_struct *work)
2440{
2441 struct bonding *bond = container_of(work, struct bonding,
2442 mii_work.work);
2443 bool should_notify_peers = false;
2444 unsigned long delay;
2445
2446 read_lock(&bond->lock);
2447
2448 delay = msecs_to_jiffies(bond->params.miimon);
2449
2450 if (bond->slave_cnt == 0)
2451 goto re_arm;
2452
2453 should_notify_peers = bond_should_notify_peers(bond);
2454
2455 if (bond_miimon_inspect(bond)) {
2456 read_unlock(&bond->lock);
2457
2458
2459 if (!rtnl_trylock()) {
2460 read_lock(&bond->lock);
2461 delay = 1;
2462 should_notify_peers = false;
2463 goto re_arm;
2464 }
2465
2466 read_lock(&bond->lock);
2467
2468 bond_miimon_commit(bond);
2469
2470 read_unlock(&bond->lock);
2471 rtnl_unlock();
2472 read_lock(&bond->lock);
2473 }
2474
2475re_arm:
2476 if (bond->params.miimon)
2477 queue_delayed_work(bond->wq, &bond->mii_work, delay);
2478
2479 read_unlock(&bond->lock);
2480
2481 if (should_notify_peers) {
2482 if (!rtnl_trylock()) {
2483 read_lock(&bond->lock);
2484 bond->send_peer_notif++;
2485 read_unlock(&bond->lock);
2486 return;
2487 }
2488 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, bond->dev);
2489 rtnl_unlock();
2490 }
2491}
2492
2493static int bond_has_this_ip(struct bonding *bond, __be32 ip)
2494{
2495 struct vlan_entry *vlan;
2496 struct net_device *vlan_dev;
2497
2498 if (ip == bond_confirm_addr(bond->dev, 0, ip))
2499 return 1;
2500
2501 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2502 rcu_read_lock();
2503 vlan_dev = __vlan_find_dev_deep(bond->dev, htons(ETH_P_8021Q),
2504 vlan->vlan_id);
2505 rcu_read_unlock();
2506 if (vlan_dev && ip == bond_confirm_addr(vlan_dev, 0, ip))
2507 return 1;
2508 }
2509
2510 return 0;
2511}
2512
2513
2514
2515
2516
2517
2518static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
2519{
2520 struct sk_buff *skb;
2521
2522 pr_debug("arp %d on slave %s: dst %pI4 src %pI4 vid %d\n", arp_op,
2523 slave_dev->name, &dest_ip, &src_ip, vlan_id);
2524
2525 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2526 NULL, slave_dev->dev_addr, NULL);
2527
2528 if (!skb) {
2529 pr_err("ARP packet allocation failed\n");
2530 return;
2531 }
2532 if (vlan_id) {
2533 skb = vlan_put_tag(skb, htons(ETH_P_8021Q), vlan_id);
2534 if (!skb) {
2535 pr_err("failed to insert VLAN tag\n");
2536 return;
2537 }
2538 }
2539 arp_xmit(skb);
2540}
2541
2542
2543static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2544{
2545 int i, vlan_id;
2546 __be32 *targets = bond->params.arp_targets;
2547 struct vlan_entry *vlan;
2548 struct net_device *vlan_dev = NULL;
2549 struct rtable *rt;
2550
2551 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2552 __be32 addr;
2553 if (!targets[i])
2554 break;
2555 pr_debug("basa: target %pI4\n", &targets[i]);
2556 if (!bond_vlan_used(bond)) {
2557 pr_debug("basa: empty vlan: arp_send\n");
2558 addr = bond_confirm_addr(bond->dev, targets[i], 0);
2559 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2560 addr, 0);
2561 continue;
2562 }
2563
2564
2565
2566
2567
2568
2569 rt = ip_route_output(dev_net(bond->dev), targets[i], 0,
2570 RTO_ONLINK, 0);
2571 if (IS_ERR(rt)) {
2572 if (net_ratelimit()) {
2573 pr_warning("%s: no route to arp_ip_target %pI4\n",
2574 bond->dev->name, &targets[i]);
2575 }
2576 continue;
2577 }
2578
2579
2580
2581
2582 if (rt->dst.dev == bond->dev) {
2583 ip_rt_put(rt);
2584 pr_debug("basa: rtdev == bond->dev: arp_send\n");
2585 addr = bond_confirm_addr(bond->dev, targets[i], 0);
2586 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2587 addr, 0);
2588 continue;
2589 }
2590
2591 vlan_id = 0;
2592 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2593 rcu_read_lock();
2594 vlan_dev = __vlan_find_dev_deep(bond->dev,
2595 htons(ETH_P_8021Q),
2596 vlan->vlan_id);
2597 rcu_read_unlock();
2598 if (vlan_dev == rt->dst.dev) {
2599 vlan_id = vlan->vlan_id;
2600 pr_debug("basa: vlan match on %s %d\n",
2601 vlan_dev->name, vlan_id);
2602 break;
2603 }
2604 }
2605
2606 if (vlan_id && vlan_dev) {
2607 ip_rt_put(rt);
2608 addr = bond_confirm_addr(vlan_dev, targets[i], 0);
2609 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2610 addr, vlan_id);
2611 continue;
2612 }
2613
2614 if (net_ratelimit()) {
2615 pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2616 bond->dev->name, &targets[i],
2617 rt->dst.dev ? rt->dst.dev->name : "NULL");
2618 }
2619 ip_rt_put(rt);
2620 }
2621}
2622
2623static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
2624{
2625 int i;
2626
2627 if (!sip || !bond_has_this_ip(bond, tip)) {
2628 pr_debug("bva: sip %pI4 tip %pI4 not found\n", &sip, &tip);
2629 return;
2630 }
2631
2632 i = bond_get_targets_ip(bond->params.arp_targets, sip);
2633 if (i == -1) {
2634 pr_debug("bva: sip %pI4 not found in targets\n", &sip);
2635 return;
2636 }
2637 slave->last_arp_rx = jiffies;
2638 slave->target_last_arp_rx[i] = jiffies;
2639}
2640
2641static int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond,
2642 struct slave *slave)
2643{
2644 struct arphdr *arp = (struct arphdr *)skb->data;
2645 unsigned char *arp_ptr;
2646 __be32 sip, tip;
2647 int alen;
2648
2649 if (skb->protocol != __cpu_to_be16(ETH_P_ARP))
2650 return RX_HANDLER_ANOTHER;
2651
2652 read_lock(&bond->lock);
2653
2654 if (!slave_do_arp_validate(bond, slave))
2655 goto out_unlock;
2656
2657 alen = arp_hdr_len(bond->dev);
2658
2659 pr_debug("bond_arp_rcv: bond %s skb->dev %s\n",
2660 bond->dev->name, skb->dev->name);
2661
2662 if (alen > skb_headlen(skb)) {
2663 arp = kmalloc(alen, GFP_ATOMIC);
2664 if (!arp)
2665 goto out_unlock;
2666 if (skb_copy_bits(skb, 0, arp, alen) < 0)
2667 goto out_unlock;
2668 }
2669
2670 if (arp->ar_hln != bond->dev->addr_len ||
2671 skb->pkt_type == PACKET_OTHERHOST ||
2672 skb->pkt_type == PACKET_LOOPBACK ||
2673 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2674 arp->ar_pro != htons(ETH_P_IP) ||
2675 arp->ar_pln != 4)
2676 goto out_unlock;
2677
2678 arp_ptr = (unsigned char *)(arp + 1);
2679 arp_ptr += bond->dev->addr_len;
2680 memcpy(&sip, arp_ptr, 4);
2681 arp_ptr += 4 + bond->dev->addr_len;
2682 memcpy(&tip, arp_ptr, 4);
2683
2684 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2685 bond->dev->name, slave->dev->name, bond_slave_state(slave),
2686 bond->params.arp_validate, slave_do_arp_validate(bond, slave),
2687 &sip, &tip);
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702 if (bond_is_active_slave(slave))
2703 bond_validate_arp(bond, slave, sip, tip);
2704 else if (bond->curr_active_slave &&
2705 time_after(slave_last_rx(bond, bond->curr_active_slave),
2706 bond->curr_active_slave->jiffies))
2707 bond_validate_arp(bond, slave, tip, sip);
2708
2709out_unlock:
2710 read_unlock(&bond->lock);
2711 if (arp != (struct arphdr *)skb->data)
2712 kfree(arp);
2713 return RX_HANDLER_ANOTHER;
2714}
2715
2716
2717
2718
2719
2720
2721
2722
2723void bond_loadbalance_arp_mon(struct work_struct *work)
2724{
2725 struct bonding *bond = container_of(work, struct bonding,
2726 arp_work.work);
2727 struct slave *slave, *oldcurrent;
2728 int do_failover = 0;
2729 int delta_in_ticks, extra_ticks;
2730 int i;
2731
2732 read_lock(&bond->lock);
2733
2734 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
2735 extra_ticks = delta_in_ticks / 2;
2736
2737 if (bond->slave_cnt == 0)
2738 goto re_arm;
2739
2740 read_lock(&bond->curr_slave_lock);
2741 oldcurrent = bond->curr_active_slave;
2742 read_unlock(&bond->curr_slave_lock);
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752 bond_for_each_slave(bond, slave, i) {
2753 unsigned long trans_start = dev_trans_start(slave->dev);
2754
2755 if (slave->link != BOND_LINK_UP) {
2756 if (time_in_range(jiffies,
2757 trans_start - delta_in_ticks,
2758 trans_start + delta_in_ticks + extra_ticks) &&
2759 time_in_range(jiffies,
2760 slave->dev->last_rx - delta_in_ticks,
2761 slave->dev->last_rx + delta_in_ticks + extra_ticks)) {
2762
2763 slave->link = BOND_LINK_UP;
2764 bond_set_active_slave(slave);
2765
2766
2767
2768
2769
2770
2771 if (!oldcurrent) {
2772 pr_info("%s: link status definitely up for interface %s, ",
2773 bond->dev->name,
2774 slave->dev->name);
2775 do_failover = 1;
2776 } else {
2777 pr_info("%s: interface %s is now up\n",
2778 bond->dev->name,
2779 slave->dev->name);
2780 }
2781 }
2782 } else {
2783
2784
2785
2786
2787
2788
2789 if (!time_in_range(jiffies,
2790 trans_start - delta_in_ticks,
2791 trans_start + 2 * delta_in_ticks + extra_ticks) ||
2792 !time_in_range(jiffies,
2793 slave->dev->last_rx - delta_in_ticks,
2794 slave->dev->last_rx + 2 * delta_in_ticks + extra_ticks)) {
2795
2796 slave->link = BOND_LINK_DOWN;
2797 bond_set_backup_slave(slave);
2798
2799 if (slave->link_failure_count < UINT_MAX)
2800 slave->link_failure_count++;
2801
2802 pr_info("%s: interface %s is now down.\n",
2803 bond->dev->name,
2804 slave->dev->name);
2805
2806 if (slave == oldcurrent)
2807 do_failover = 1;
2808 }
2809 }
2810
2811
2812
2813
2814
2815
2816
2817
2818 if (IS_UP(slave->dev))
2819 bond_arp_send_all(bond, slave);
2820 }
2821
2822 if (do_failover) {
2823 block_netpoll_tx();
2824 write_lock_bh(&bond->curr_slave_lock);
2825
2826 bond_select_active_slave(bond);
2827
2828 write_unlock_bh(&bond->curr_slave_lock);
2829 unblock_netpoll_tx();
2830 }
2831
2832re_arm:
2833 if (bond->params.arp_interval)
2834 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
2835
2836 read_unlock(&bond->lock);
2837}
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks)
2848{
2849 struct slave *slave;
2850 int i, commit = 0;
2851 unsigned long trans_start;
2852 int extra_ticks;
2853
2854
2855
2856
2857
2858
2859 extra_ticks = delta_in_ticks / 2;
2860
2861 bond_for_each_slave(bond, slave, i) {
2862 slave->new_link = BOND_LINK_NOCHANGE;
2863
2864 if (slave->link != BOND_LINK_UP) {
2865 if (time_in_range(jiffies,
2866 slave_last_rx(bond, slave) - delta_in_ticks,
2867 slave_last_rx(bond, slave) + delta_in_ticks + extra_ticks)) {
2868
2869 slave->new_link = BOND_LINK_UP;
2870 commit++;
2871 }
2872
2873 continue;
2874 }
2875
2876
2877
2878
2879
2880
2881 if (time_in_range(jiffies,
2882 slave->jiffies - delta_in_ticks,
2883 slave->jiffies + 2 * delta_in_ticks + extra_ticks))
2884 continue;
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899 if (!bond_is_active_slave(slave) &&
2900 !bond->current_arp_slave &&
2901 !time_in_range(jiffies,
2902 slave_last_rx(bond, slave) - delta_in_ticks,
2903 slave_last_rx(bond, slave) + 3 * delta_in_ticks + extra_ticks)) {
2904
2905 slave->new_link = BOND_LINK_DOWN;
2906 commit++;
2907 }
2908
2909
2910
2911
2912
2913
2914
2915 trans_start = dev_trans_start(slave->dev);
2916 if (bond_is_active_slave(slave) &&
2917 (!time_in_range(jiffies,
2918 trans_start - delta_in_ticks,
2919 trans_start + 2 * delta_in_ticks + extra_ticks) ||
2920 !time_in_range(jiffies,
2921 slave_last_rx(bond, slave) - delta_in_ticks,
2922 slave_last_rx(bond, slave) + 2 * delta_in_ticks + extra_ticks))) {
2923
2924 slave->new_link = BOND_LINK_DOWN;
2925 commit++;
2926 }
2927 }
2928
2929 return commit;
2930}
2931
2932
2933
2934
2935
2936
2937
2938static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks)
2939{
2940 struct slave *slave;
2941 int i;
2942 unsigned long trans_start;
2943
2944 bond_for_each_slave(bond, slave, i) {
2945 switch (slave->new_link) {
2946 case BOND_LINK_NOCHANGE:
2947 continue;
2948
2949 case BOND_LINK_UP:
2950 trans_start = dev_trans_start(slave->dev);
2951 if ((!bond->curr_active_slave &&
2952 time_in_range(jiffies,
2953 trans_start - delta_in_ticks,
2954 trans_start + delta_in_ticks + delta_in_ticks / 2)) ||
2955 bond->curr_active_slave != slave) {
2956 slave->link = BOND_LINK_UP;
2957 if (bond->current_arp_slave) {
2958 bond_set_slave_inactive_flags(
2959 bond->current_arp_slave);
2960 bond->current_arp_slave = NULL;
2961 }
2962
2963 pr_info("%s: link status definitely up for interface %s.\n",
2964 bond->dev->name, slave->dev->name);
2965
2966 if (!bond->curr_active_slave ||
2967 (slave == bond->primary_slave))
2968 goto do_failover;
2969
2970 }
2971
2972 continue;
2973
2974 case BOND_LINK_DOWN:
2975 if (slave->link_failure_count < UINT_MAX)
2976 slave->link_failure_count++;
2977
2978 slave->link = BOND_LINK_DOWN;
2979 bond_set_slave_inactive_flags(slave);
2980
2981 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2982 bond->dev->name, slave->dev->name);
2983
2984 if (slave == bond->curr_active_slave) {
2985 bond->current_arp_slave = NULL;
2986 goto do_failover;
2987 }
2988
2989 continue;
2990
2991 default:
2992 pr_err("%s: impossible: new_link %d on slave %s\n",
2993 bond->dev->name, slave->new_link,
2994 slave->dev->name);
2995 continue;
2996 }
2997
2998do_failover:
2999 ASSERT_RTNL();
3000 block_netpoll_tx();
3001 write_lock_bh(&bond->curr_slave_lock);
3002 bond_select_active_slave(bond);
3003 write_unlock_bh(&bond->curr_slave_lock);
3004 unblock_netpoll_tx();
3005 }
3006
3007 bond_set_carrier(bond);
3008}
3009
3010
3011
3012
3013
3014
3015static void bond_ab_arp_probe(struct bonding *bond)
3016{
3017 struct slave *slave;
3018 int i;
3019
3020 read_lock(&bond->curr_slave_lock);
3021
3022 if (bond->current_arp_slave && bond->curr_active_slave)
3023 pr_info("PROBE: c_arp %s && cas %s BAD\n",
3024 bond->current_arp_slave->dev->name,
3025 bond->curr_active_slave->dev->name);
3026
3027 if (bond->curr_active_slave) {
3028 bond_arp_send_all(bond, bond->curr_active_slave);
3029 read_unlock(&bond->curr_slave_lock);
3030 return;
3031 }
3032
3033 read_unlock(&bond->curr_slave_lock);
3034
3035
3036
3037
3038
3039
3040 if (!bond->current_arp_slave) {
3041 bond->current_arp_slave = bond->first_slave;
3042 if (!bond->current_arp_slave)
3043 return;
3044 }
3045
3046 bond_set_slave_inactive_flags(bond->current_arp_slave);
3047
3048
3049 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
3050 if (IS_UP(slave->dev)) {
3051 slave->link = BOND_LINK_BACK;
3052 bond_set_slave_active_flags(slave);
3053 bond_arp_send_all(bond, slave);
3054 slave->jiffies = jiffies;
3055 bond->current_arp_slave = slave;
3056 break;
3057 }
3058
3059
3060
3061
3062
3063
3064
3065
3066 if (slave->link == BOND_LINK_UP) {
3067 slave->link = BOND_LINK_DOWN;
3068 if (slave->link_failure_count < UINT_MAX)
3069 slave->link_failure_count++;
3070
3071 bond_set_slave_inactive_flags(slave);
3072
3073 pr_info("%s: backup interface %s is now down.\n",
3074 bond->dev->name, slave->dev->name);
3075 }
3076 }
3077}
3078
3079void bond_activebackup_arp_mon(struct work_struct *work)
3080{
3081 struct bonding *bond = container_of(work, struct bonding,
3082 arp_work.work);
3083 bool should_notify_peers = false;
3084 int delta_in_ticks;
3085
3086 read_lock(&bond->lock);
3087
3088 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
3089
3090 if (bond->slave_cnt == 0)
3091 goto re_arm;
3092
3093 should_notify_peers = bond_should_notify_peers(bond);
3094
3095 if (bond_ab_arp_inspect(bond, delta_in_ticks)) {
3096 read_unlock(&bond->lock);
3097
3098
3099 if (!rtnl_trylock()) {
3100 read_lock(&bond->lock);
3101 delta_in_ticks = 1;
3102 should_notify_peers = false;
3103 goto re_arm;
3104 }
3105
3106 read_lock(&bond->lock);
3107
3108 bond_ab_arp_commit(bond, delta_in_ticks);
3109
3110 read_unlock(&bond->lock);
3111 rtnl_unlock();
3112 read_lock(&bond->lock);
3113 }
3114
3115 bond_ab_arp_probe(bond);
3116
3117re_arm:
3118 if (bond->params.arp_interval)
3119 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
3120
3121 read_unlock(&bond->lock);
3122
3123 if (should_notify_peers) {
3124 if (!rtnl_trylock()) {
3125 read_lock(&bond->lock);
3126 bond->send_peer_notif++;
3127 read_unlock(&bond->lock);
3128 return;
3129 }
3130 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, bond->dev);
3131 rtnl_unlock();
3132 }
3133}
3134
3135
3136
3137
3138
3139
3140static int bond_event_changename(struct bonding *bond)
3141{
3142 bond_remove_proc_entry(bond);
3143 bond_create_proc_entry(bond);
3144
3145 bond_debug_reregister(bond);
3146
3147 return NOTIFY_DONE;
3148}
3149
3150static int bond_master_netdev_event(unsigned long event,
3151 struct net_device *bond_dev)
3152{
3153 struct bonding *event_bond = netdev_priv(bond_dev);
3154
3155 switch (event) {
3156 case NETDEV_CHANGENAME:
3157 return bond_event_changename(event_bond);
3158 case NETDEV_UNREGISTER:
3159 bond_remove_proc_entry(event_bond);
3160 break;
3161 case NETDEV_REGISTER:
3162 bond_create_proc_entry(event_bond);
3163 break;
3164 default:
3165 break;
3166 }
3167
3168 return NOTIFY_DONE;
3169}
3170
3171static int bond_slave_netdev_event(unsigned long event,
3172 struct net_device *slave_dev)
3173{
3174 struct slave *slave = bond_slave_get_rtnl(slave_dev);
3175 struct bonding *bond;
3176 struct net_device *bond_dev;
3177 u32 old_speed;
3178 u8 old_duplex;
3179
3180
3181
3182
3183
3184 if (!slave)
3185 return NOTIFY_DONE;
3186 bond_dev = slave->bond->dev;
3187 bond = slave->bond;
3188
3189 switch (event) {
3190 case NETDEV_UNREGISTER:
3191 if (bond_dev->type != ARPHRD_ETHER)
3192 bond_release_and_destroy(bond_dev, slave_dev);
3193 else
3194 bond_release(bond_dev, slave_dev);
3195 break;
3196 case NETDEV_UP:
3197 case NETDEV_CHANGE:
3198 old_speed = slave->speed;
3199 old_duplex = slave->duplex;
3200
3201 bond_update_speed_duplex(slave);
3202
3203 if (bond->params.mode == BOND_MODE_8023AD) {
3204 if (old_speed != slave->speed)
3205 bond_3ad_adapter_speed_changed(slave);
3206 if (old_duplex != slave->duplex)
3207 bond_3ad_adapter_duplex_changed(slave);
3208 }
3209 break;
3210 case NETDEV_DOWN:
3211
3212
3213
3214 break;
3215 case NETDEV_CHANGEMTU:
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228 break;
3229 case NETDEV_CHANGENAME:
3230
3231
3232
3233 break;
3234 case NETDEV_FEAT_CHANGE:
3235 bond_compute_features(bond);
3236 break;
3237 default:
3238 break;
3239 }
3240
3241 return NOTIFY_DONE;
3242}
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252static int bond_netdev_event(struct notifier_block *this,
3253 unsigned long event, void *ptr)
3254{
3255 struct net_device *event_dev = netdev_notifier_info_to_dev(ptr);
3256
3257 pr_debug("event_dev: %s, event: %lx\n",
3258 event_dev ? event_dev->name : "None",
3259 event);
3260
3261 if (!(event_dev->priv_flags & IFF_BONDING))
3262 return NOTIFY_DONE;
3263
3264 if (event_dev->flags & IFF_MASTER) {
3265 pr_debug("IFF_MASTER\n");
3266 return bond_master_netdev_event(event, event_dev);
3267 }
3268
3269 if (event_dev->flags & IFF_SLAVE) {
3270 pr_debug("IFF_SLAVE\n");
3271 return bond_slave_netdev_event(event, event_dev);
3272 }
3273
3274 return NOTIFY_DONE;
3275}
3276
3277static struct notifier_block bond_netdev_notifier = {
3278 .notifier_call = bond_netdev_event,
3279};
3280
3281
3282
3283
3284
3285
3286static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count)
3287{
3288 struct ethhdr *data = (struct ethhdr *)skb->data;
3289
3290 if (skb_headlen(skb) >= offsetof(struct ethhdr, h_proto))
3291 return (data->h_dest[5] ^ data->h_source[5]) % count;
3292
3293 return 0;
3294}
3295
3296
3297
3298
3299
3300static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count)
3301{
3302 const struct ethhdr *data;
3303 const struct iphdr *iph;
3304 const struct ipv6hdr *ipv6h;
3305 u32 v6hash;
3306 const __be32 *s, *d;
3307
3308 if (skb->protocol == htons(ETH_P_IP) &&
3309 pskb_network_may_pull(skb, sizeof(*iph))) {
3310 iph = ip_hdr(skb);
3311 data = (struct ethhdr *)skb->data;
3312 return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^
3313 (data->h_dest[5] ^ data->h_source[5])) % count;
3314 } else if (skb->protocol == htons(ETH_P_IPV6) &&
3315 pskb_network_may_pull(skb, sizeof(*ipv6h))) {
3316 ipv6h = ipv6_hdr(skb);
3317 data = (struct ethhdr *)skb->data;
3318 s = &ipv6h->saddr.s6_addr32[0];
3319 d = &ipv6h->daddr.s6_addr32[0];
3320 v6hash = (s[1] ^ d[1]) ^ (s[2] ^ d[2]) ^ (s[3] ^ d[3]);
3321 v6hash ^= (v6hash >> 24) ^ (v6hash >> 16) ^ (v6hash >> 8);
3322 return (v6hash ^ data->h_dest[5] ^ data->h_source[5]) % count;
3323 }
3324
3325 return bond_xmit_hash_policy_l2(skb, count);
3326}
3327
3328
3329
3330
3331
3332
3333static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count)
3334{
3335 u32 layer4_xor = 0;
3336 const struct iphdr *iph;
3337 const struct ipv6hdr *ipv6h;
3338 const __be32 *s, *d;
3339 const __be16 *l4 = NULL;
3340 __be16 _l4[2];
3341 int noff = skb_network_offset(skb);
3342 int poff;
3343
3344 if (skb->protocol == htons(ETH_P_IP) &&
3345 pskb_may_pull(skb, noff + sizeof(*iph))) {
3346 iph = ip_hdr(skb);
3347 poff = proto_ports_offset(iph->protocol);
3348
3349 if (!ip_is_fragment(iph) && poff >= 0) {
3350 l4 = skb_header_pointer(skb, noff + (iph->ihl << 2) + poff,
3351 sizeof(_l4), &_l4);
3352 if (l4)
3353 layer4_xor = ntohs(l4[0] ^ l4[1]);
3354 }
3355 return (layer4_xor ^
3356 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3357 } else if (skb->protocol == htons(ETH_P_IPV6) &&
3358 pskb_may_pull(skb, noff + sizeof(*ipv6h))) {
3359 ipv6h = ipv6_hdr(skb);
3360 poff = proto_ports_offset(ipv6h->nexthdr);
3361 if (poff >= 0) {
3362 l4 = skb_header_pointer(skb, noff + sizeof(*ipv6h) + poff,
3363 sizeof(_l4), &_l4);
3364 if (l4)
3365 layer4_xor = ntohs(l4[0] ^ l4[1]);
3366 }
3367 s = &ipv6h->saddr.s6_addr32[0];
3368 d = &ipv6h->daddr.s6_addr32[0];
3369 layer4_xor ^= (s[1] ^ d[1]) ^ (s[2] ^ d[2]) ^ (s[3] ^ d[3]);
3370 layer4_xor ^= (layer4_xor >> 24) ^ (layer4_xor >> 16) ^
3371 (layer4_xor >> 8);
3372 return layer4_xor % count;
3373 }
3374
3375 return bond_xmit_hash_policy_l2(skb, count);
3376}
3377
3378
3379
3380static void bond_work_init_all(struct bonding *bond)
3381{
3382 INIT_DELAYED_WORK(&bond->mcast_work,
3383 bond_resend_igmp_join_requests_delayed);
3384 INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
3385 INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
3386 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
3387 INIT_DELAYED_WORK(&bond->arp_work, bond_activebackup_arp_mon);
3388 else
3389 INIT_DELAYED_WORK(&bond->arp_work, bond_loadbalance_arp_mon);
3390 INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
3391}
3392
3393static void bond_work_cancel_all(struct bonding *bond)
3394{
3395 cancel_delayed_work_sync(&bond->mii_work);
3396 cancel_delayed_work_sync(&bond->arp_work);
3397 cancel_delayed_work_sync(&bond->alb_work);
3398 cancel_delayed_work_sync(&bond->ad_work);
3399 cancel_delayed_work_sync(&bond->mcast_work);
3400}
3401
3402static int bond_open(struct net_device *bond_dev)
3403{
3404 struct bonding *bond = netdev_priv(bond_dev);
3405 struct slave *slave;
3406 int i;
3407
3408
3409 read_lock(&bond->lock);
3410 if (bond->slave_cnt > 0) {
3411 read_lock(&bond->curr_slave_lock);
3412 bond_for_each_slave(bond, slave, i) {
3413 if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP)
3414 && (slave != bond->curr_active_slave)) {
3415 bond_set_slave_inactive_flags(slave);
3416 } else {
3417 bond_set_slave_active_flags(slave);
3418 }
3419 }
3420 read_unlock(&bond->curr_slave_lock);
3421 }
3422 read_unlock(&bond->lock);
3423
3424 bond_work_init_all(bond);
3425
3426 if (bond_is_lb(bond)) {
3427
3428
3429
3430 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB)))
3431 return -ENOMEM;
3432 queue_delayed_work(bond->wq, &bond->alb_work, 0);
3433 }
3434
3435 if (bond->params.miimon)
3436 queue_delayed_work(bond->wq, &bond->mii_work, 0);
3437
3438 if (bond->params.arp_interval) {
3439 queue_delayed_work(bond->wq, &bond->arp_work, 0);
3440 if (bond->params.arp_validate)
3441 bond->recv_probe = bond_arp_rcv;
3442 }
3443
3444 if (bond->params.mode == BOND_MODE_8023AD) {
3445 queue_delayed_work(bond->wq, &bond->ad_work, 0);
3446
3447 bond->recv_probe = bond_3ad_lacpdu_recv;
3448 bond_3ad_initiate_agg_selection(bond, 1);
3449 }
3450
3451 return 0;
3452}
3453
3454static int bond_close(struct net_device *bond_dev)
3455{
3456 struct bonding *bond = netdev_priv(bond_dev);
3457
3458 write_lock_bh(&bond->lock);
3459 bond->send_peer_notif = 0;
3460 write_unlock_bh(&bond->lock);
3461
3462 bond_work_cancel_all(bond);
3463 if (bond_is_lb(bond)) {
3464
3465
3466
3467 bond_alb_deinitialize(bond);
3468 }
3469 bond->recv_probe = NULL;
3470
3471 return 0;
3472}
3473
3474static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev,
3475 struct rtnl_link_stats64 *stats)
3476{
3477 struct bonding *bond = netdev_priv(bond_dev);
3478 struct rtnl_link_stats64 temp;
3479 struct slave *slave;
3480 int i;
3481
3482 memset(stats, 0, sizeof(*stats));
3483
3484 read_lock_bh(&bond->lock);
3485
3486 bond_for_each_slave(bond, slave, i) {
3487 const struct rtnl_link_stats64 *sstats =
3488 dev_get_stats(slave->dev, &temp);
3489
3490 stats->rx_packets += sstats->rx_packets;
3491 stats->rx_bytes += sstats->rx_bytes;
3492 stats->rx_errors += sstats->rx_errors;
3493 stats->rx_dropped += sstats->rx_dropped;
3494
3495 stats->tx_packets += sstats->tx_packets;
3496 stats->tx_bytes += sstats->tx_bytes;
3497 stats->tx_errors += sstats->tx_errors;
3498 stats->tx_dropped += sstats->tx_dropped;
3499
3500 stats->multicast += sstats->multicast;
3501 stats->collisions += sstats->collisions;
3502
3503 stats->rx_length_errors += sstats->rx_length_errors;
3504 stats->rx_over_errors += sstats->rx_over_errors;
3505 stats->rx_crc_errors += sstats->rx_crc_errors;
3506 stats->rx_frame_errors += sstats->rx_frame_errors;
3507 stats->rx_fifo_errors += sstats->rx_fifo_errors;
3508 stats->rx_missed_errors += sstats->rx_missed_errors;
3509
3510 stats->tx_aborted_errors += sstats->tx_aborted_errors;
3511 stats->tx_carrier_errors += sstats->tx_carrier_errors;
3512 stats->tx_fifo_errors += sstats->tx_fifo_errors;
3513 stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3514 stats->tx_window_errors += sstats->tx_window_errors;
3515 }
3516
3517 read_unlock_bh(&bond->lock);
3518
3519 return stats;
3520}
3521
3522static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3523{
3524 struct net_device *slave_dev = NULL;
3525 struct ifbond k_binfo;
3526 struct ifbond __user *u_binfo = NULL;
3527 struct ifslave k_sinfo;
3528 struct ifslave __user *u_sinfo = NULL;
3529 struct mii_ioctl_data *mii = NULL;
3530 struct net *net;
3531 int res = 0;
3532
3533 pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd);
3534
3535 switch (cmd) {
3536 case SIOCGMIIPHY:
3537 mii = if_mii(ifr);
3538 if (!mii)
3539 return -EINVAL;
3540
3541 mii->phy_id = 0;
3542
3543 case SIOCGMIIREG:
3544
3545
3546
3547
3548 mii = if_mii(ifr);
3549 if (!mii)
3550 return -EINVAL;
3551
3552
3553 if (mii->reg_num == 1) {
3554 struct bonding *bond = netdev_priv(bond_dev);
3555 mii->val_out = 0;
3556 read_lock(&bond->lock);
3557 read_lock(&bond->curr_slave_lock);
3558 if (netif_carrier_ok(bond->dev))
3559 mii->val_out = BMSR_LSTATUS;
3560
3561 read_unlock(&bond->curr_slave_lock);
3562 read_unlock(&bond->lock);
3563 }
3564
3565 return 0;
3566 case BOND_INFO_QUERY_OLD:
3567 case SIOCBONDINFOQUERY:
3568 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3569
3570 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond)))
3571 return -EFAULT;
3572
3573 res = bond_info_query(bond_dev, &k_binfo);
3574 if (res == 0 &&
3575 copy_to_user(u_binfo, &k_binfo, sizeof(ifbond)))
3576 return -EFAULT;
3577
3578 return res;
3579 case BOND_SLAVE_INFO_QUERY_OLD:
3580 case SIOCBONDSLAVEINFOQUERY:
3581 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3582
3583 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave)))
3584 return -EFAULT;
3585
3586 res = bond_slave_info_query(bond_dev, &k_sinfo);
3587 if (res == 0 &&
3588 copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave)))
3589 return -EFAULT;
3590
3591 return res;
3592 default:
3593
3594 break;
3595 }
3596
3597 net = dev_net(bond_dev);
3598
3599 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
3600 return -EPERM;
3601
3602 slave_dev = dev_get_by_name(net, ifr->ifr_slave);
3603
3604 pr_debug("slave_dev=%p:\n", slave_dev);
3605
3606 if (!slave_dev)
3607 res = -ENODEV;
3608 else {
3609 pr_debug("slave_dev->name=%s:\n", slave_dev->name);
3610 switch (cmd) {
3611 case BOND_ENSLAVE_OLD:
3612 case SIOCBONDENSLAVE:
3613 res = bond_enslave(bond_dev, slave_dev);
3614 break;
3615 case BOND_RELEASE_OLD:
3616 case SIOCBONDRELEASE:
3617 res = bond_release(bond_dev, slave_dev);
3618 break;
3619 case BOND_SETHWADDR_OLD:
3620 case SIOCBONDSETHWADDR:
3621 bond_set_dev_addr(bond_dev, slave_dev);
3622 res = 0;
3623 break;
3624 case BOND_CHANGE_ACTIVE_OLD:
3625 case SIOCBONDCHANGEACTIVE:
3626 res = bond_ioctl_change_active(bond_dev, slave_dev);
3627 break;
3628 default:
3629 res = -EOPNOTSUPP;
3630 }
3631
3632 dev_put(slave_dev);
3633 }
3634
3635 return res;
3636}
3637
3638static void bond_change_rx_flags(struct net_device *bond_dev, int change)
3639{
3640 struct bonding *bond = netdev_priv(bond_dev);
3641
3642 if (change & IFF_PROMISC)
3643 bond_set_promiscuity(bond,
3644 bond_dev->flags & IFF_PROMISC ? 1 : -1);
3645
3646 if (change & IFF_ALLMULTI)
3647 bond_set_allmulti(bond,
3648 bond_dev->flags & IFF_ALLMULTI ? 1 : -1);
3649}
3650
3651static void bond_set_rx_mode(struct net_device *bond_dev)
3652{
3653 struct bonding *bond = netdev_priv(bond_dev);
3654 struct slave *slave;
3655 int i;
3656
3657 read_lock(&bond->lock);
3658
3659 if (USES_PRIMARY(bond->params.mode)) {
3660 read_lock(&bond->curr_slave_lock);
3661 slave = bond->curr_active_slave;
3662 if (slave) {
3663 dev_uc_sync(slave->dev, bond_dev);
3664 dev_mc_sync(slave->dev, bond_dev);
3665 }
3666 read_unlock(&bond->curr_slave_lock);
3667 } else {
3668 bond_for_each_slave(bond, slave, i) {
3669 dev_uc_sync_multiple(slave->dev, bond_dev);
3670 dev_mc_sync_multiple(slave->dev, bond_dev);
3671 }
3672 }
3673
3674 read_unlock(&bond->lock);
3675}
3676
3677static int bond_neigh_init(struct neighbour *n)
3678{
3679 struct bonding *bond = netdev_priv(n->dev);
3680 struct slave *slave = bond->first_slave;
3681 const struct net_device_ops *slave_ops;
3682 struct neigh_parms parms;
3683 int ret;
3684
3685 if (!slave)
3686 return 0;
3687
3688 slave_ops = slave->dev->netdev_ops;
3689
3690 if (!slave_ops->ndo_neigh_setup)
3691 return 0;
3692
3693 parms.neigh_setup = NULL;
3694 parms.neigh_cleanup = NULL;
3695 ret = slave_ops->ndo_neigh_setup(slave->dev, &parms);
3696 if (ret)
3697 return ret;
3698
3699
3700
3701
3702
3703
3704
3705 n->parms->neigh_cleanup = parms.neigh_cleanup;
3706
3707 if (!parms.neigh_setup)
3708 return 0;
3709
3710 return parms.neigh_setup(n);
3711}
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722static int bond_neigh_setup(struct net_device *dev,
3723 struct neigh_parms *parms)
3724{
3725
3726 if (parms->dev == dev)
3727 parms->neigh_setup = bond_neigh_init;
3728
3729 return 0;
3730}
3731
3732
3733
3734
3735static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
3736{
3737 struct bonding *bond = netdev_priv(bond_dev);
3738 struct slave *slave, *stop_at;
3739 int res = 0;
3740 int i;
3741
3742 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond,
3743 (bond_dev ? bond_dev->name : "None"), new_mtu);
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760 bond_for_each_slave(bond, slave, i) {
3761 pr_debug("s %p s->p %p c_m %p\n",
3762 slave,
3763 slave->prev,
3764 slave->dev->netdev_ops->ndo_change_mtu);
3765
3766 res = dev_set_mtu(slave->dev, new_mtu);
3767
3768 if (res) {
3769
3770
3771
3772
3773
3774
3775
3776
3777 pr_debug("err %d %s\n", res, slave->dev->name);
3778 goto unwind;
3779 }
3780 }
3781
3782 bond_dev->mtu = new_mtu;
3783
3784 return 0;
3785
3786unwind:
3787
3788 stop_at = slave;
3789 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
3790 int tmp_res;
3791
3792 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
3793 if (tmp_res) {
3794 pr_debug("unwind err %d dev %s\n",
3795 tmp_res, slave->dev->name);
3796 }
3797 }
3798
3799 return res;
3800}
3801
3802
3803
3804
3805
3806
3807
3808
3809static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
3810{
3811 struct bonding *bond = netdev_priv(bond_dev);
3812 struct sockaddr *sa = addr, tmp_sa;
3813 struct slave *slave, *stop_at;
3814 int res = 0;
3815 int i;
3816
3817 if (bond->params.mode == BOND_MODE_ALB)
3818 return bond_alb_set_mac_address(bond_dev, addr);
3819
3820
3821 pr_debug("bond=%p, name=%s\n",
3822 bond, bond_dev ? bond_dev->name : "None");
3823
3824
3825
3826
3827 if (bond->params.fail_over_mac)
3828 return 0;
3829
3830 if (!is_valid_ether_addr(sa->sa_data))
3831 return -EADDRNOTAVAIL;
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848 bond_for_each_slave(bond, slave, i) {
3849 const struct net_device_ops *slave_ops = slave->dev->netdev_ops;
3850 pr_debug("slave %p %s\n", slave, slave->dev->name);
3851
3852 if (slave_ops->ndo_set_mac_address == NULL) {
3853 res = -EOPNOTSUPP;
3854 pr_debug("EOPNOTSUPP %s\n", slave->dev->name);
3855 goto unwind;
3856 }
3857
3858 res = dev_set_mac_address(slave->dev, addr);
3859 if (res) {
3860
3861
3862
3863
3864
3865
3866 pr_debug("err %d %s\n", res, slave->dev->name);
3867 goto unwind;
3868 }
3869 }
3870
3871
3872 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
3873 return 0;
3874
3875unwind:
3876 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
3877 tmp_sa.sa_family = bond_dev->type;
3878
3879
3880 stop_at = slave;
3881 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
3882 int tmp_res;
3883
3884 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
3885 if (tmp_res) {
3886 pr_debug("unwind err %d dev %s\n",
3887 tmp_res, slave->dev->name);
3888 }
3889 }
3890
3891 return res;
3892}
3893
3894static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
3895{
3896 struct bonding *bond = netdev_priv(bond_dev);
3897 struct slave *slave, *start_at;
3898 int i, slave_no, res = 1;
3899 struct iphdr *iph = ip_hdr(skb);
3900
3901
3902
3903
3904
3905
3906
3907
3908 if ((iph->protocol == IPPROTO_IGMP) &&
3909 (skb->protocol == htons(ETH_P_IP))) {
3910
3911 read_lock(&bond->curr_slave_lock);
3912 slave = bond->curr_active_slave;
3913 read_unlock(&bond->curr_slave_lock);
3914
3915 if (!slave)
3916 goto out;
3917 } else {
3918
3919
3920
3921
3922
3923 slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
3924
3925 bond_for_each_slave(bond, slave, i) {
3926 slave_no--;
3927 if (slave_no < 0)
3928 break;
3929 }
3930 }
3931
3932 start_at = slave;
3933 bond_for_each_slave_from(bond, slave, i, start_at) {
3934 if (IS_UP(slave->dev) &&
3935 (slave->link == BOND_LINK_UP) &&
3936 bond_is_active_slave(slave)) {
3937 res = bond_dev_queue_xmit(bond, skb, slave->dev);
3938 break;
3939 }
3940 }
3941
3942out:
3943 if (res) {
3944
3945 kfree_skb(skb);
3946 }
3947
3948 return NETDEV_TX_OK;
3949}
3950
3951
3952
3953
3954
3955
3956static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
3957{
3958 struct bonding *bond = netdev_priv(bond_dev);
3959 int res = 1;
3960
3961 read_lock(&bond->curr_slave_lock);
3962
3963 if (bond->curr_active_slave)
3964 res = bond_dev_queue_xmit(bond, skb,
3965 bond->curr_active_slave->dev);
3966
3967 read_unlock(&bond->curr_slave_lock);
3968
3969 if (res)
3970
3971 kfree_skb(skb);
3972
3973 return NETDEV_TX_OK;
3974}
3975
3976
3977
3978
3979
3980
3981static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
3982{
3983 struct bonding *bond = netdev_priv(bond_dev);
3984 struct slave *slave, *start_at;
3985 int slave_no;
3986 int i;
3987 int res = 1;
3988
3989 slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt);
3990
3991 bond_for_each_slave(bond, slave, i) {
3992 slave_no--;
3993 if (slave_no < 0)
3994 break;
3995 }
3996
3997 start_at = slave;
3998
3999 bond_for_each_slave_from(bond, slave, i, start_at) {
4000 if (IS_UP(slave->dev) &&
4001 (slave->link == BOND_LINK_UP) &&
4002 bond_is_active_slave(slave)) {
4003 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4004 break;
4005 }
4006 }
4007
4008 if (res) {
4009
4010 kfree_skb(skb);
4011 }
4012
4013 return NETDEV_TX_OK;
4014}
4015
4016
4017
4018
4019static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4020{
4021 struct bonding *bond = netdev_priv(bond_dev);
4022 struct slave *slave, *start_at;
4023 struct net_device *tx_dev = NULL;
4024 int i;
4025 int res = 1;
4026
4027 read_lock(&bond->curr_slave_lock);
4028 start_at = bond->curr_active_slave;
4029 read_unlock(&bond->curr_slave_lock);
4030
4031 if (!start_at)
4032 goto out;
4033
4034 bond_for_each_slave_from(bond, slave, i, start_at) {
4035 if (IS_UP(slave->dev) &&
4036 (slave->link == BOND_LINK_UP) &&
4037 bond_is_active_slave(slave)) {
4038 if (tx_dev) {
4039 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4040 if (!skb2) {
4041 pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n",
4042 bond_dev->name);
4043 continue;
4044 }
4045
4046 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4047 if (res) {
4048 kfree_skb(skb2);
4049 continue;
4050 }
4051 }
4052 tx_dev = slave->dev;
4053 }
4054 }
4055
4056 if (tx_dev)
4057 res = bond_dev_queue_xmit(bond, skb, tx_dev);
4058
4059out:
4060 if (res)
4061
4062 kfree_skb(skb);
4063
4064
4065 return NETDEV_TX_OK;
4066}
4067
4068
4069
4070static void bond_set_xmit_hash_policy(struct bonding *bond)
4071{
4072 switch (bond->params.xmit_policy) {
4073 case BOND_XMIT_POLICY_LAYER23:
4074 bond->xmit_hash_policy = bond_xmit_hash_policy_l23;
4075 break;
4076 case BOND_XMIT_POLICY_LAYER34:
4077 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4078 break;
4079 case BOND_XMIT_POLICY_LAYER2:
4080 default:
4081 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
4082 break;
4083 }
4084}
4085
4086
4087
4088
4089static inline int bond_slave_override(struct bonding *bond,
4090 struct sk_buff *skb)
4091{
4092 int i, res = 1;
4093 struct slave *slave = NULL;
4094 struct slave *check_slave;
4095
4096 if (!skb->queue_mapping)
4097 return 1;
4098
4099
4100 bond_for_each_slave(bond, check_slave, i) {
4101 if (check_slave->queue_id == skb->queue_mapping) {
4102 slave = check_slave;
4103 break;
4104 }
4105 }
4106
4107
4108 if (slave && slave->queue_id && IS_UP(slave->dev) &&
4109 (slave->link == BOND_LINK_UP)) {
4110 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4111 }
4112
4113 return res;
4114}
4115
4116
4117static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb)
4118{
4119
4120
4121
4122
4123
4124
4125 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
4126
4127
4128
4129
4130 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
4131
4132 if (unlikely(txq >= dev->real_num_tx_queues)) {
4133 do {
4134 txq -= dev->real_num_tx_queues;
4135 } while (txq >= dev->real_num_tx_queues);
4136 }
4137 return txq;
4138}
4139
4140static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
4141{
4142 struct bonding *bond = netdev_priv(dev);
4143
4144 if (TX_QUEUE_OVERRIDE(bond->params.mode)) {
4145 if (!bond_slave_override(bond, skb))
4146 return NETDEV_TX_OK;
4147 }
4148
4149 switch (bond->params.mode) {
4150 case BOND_MODE_ROUNDROBIN:
4151 return bond_xmit_roundrobin(skb, dev);
4152 case BOND_MODE_ACTIVEBACKUP:
4153 return bond_xmit_activebackup(skb, dev);
4154 case BOND_MODE_XOR:
4155 return bond_xmit_xor(skb, dev);
4156 case BOND_MODE_BROADCAST:
4157 return bond_xmit_broadcast(skb, dev);
4158 case BOND_MODE_8023AD:
4159 return bond_3ad_xmit_xor(skb, dev);
4160 case BOND_MODE_ALB:
4161 case BOND_MODE_TLB:
4162 return bond_alb_xmit(skb, dev);
4163 default:
4164
4165 pr_err("%s: Error: Unknown bonding mode %d\n",
4166 dev->name, bond->params.mode);
4167 WARN_ON_ONCE(1);
4168 kfree_skb(skb);
4169 return NETDEV_TX_OK;
4170 }
4171}
4172
4173static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
4174{
4175 struct bonding *bond = netdev_priv(dev);
4176 netdev_tx_t ret = NETDEV_TX_OK;
4177
4178
4179
4180
4181
4182 if (is_netpoll_tx_blocked(dev))
4183 return NETDEV_TX_BUSY;
4184
4185 read_lock(&bond->lock);
4186
4187 if (bond->slave_cnt)
4188 ret = __bond_start_xmit(skb, dev);
4189 else
4190 kfree_skb(skb);
4191
4192 read_unlock(&bond->lock);
4193
4194 return ret;
4195}
4196
4197
4198
4199
4200void bond_set_mode_ops(struct bonding *bond, int mode)
4201{
4202 struct net_device *bond_dev = bond->dev;
4203
4204 switch (mode) {
4205 case BOND_MODE_ROUNDROBIN:
4206 break;
4207 case BOND_MODE_ACTIVEBACKUP:
4208 break;
4209 case BOND_MODE_XOR:
4210 bond_set_xmit_hash_policy(bond);
4211 break;
4212 case BOND_MODE_BROADCAST:
4213 break;
4214 case BOND_MODE_8023AD:
4215 bond_set_xmit_hash_policy(bond);
4216 break;
4217 case BOND_MODE_ALB:
4218
4219 case BOND_MODE_TLB:
4220 break;
4221 default:
4222
4223 pr_err("%s: Error: Unknown bonding mode %d\n",
4224 bond_dev->name, mode);
4225 break;
4226 }
4227}
4228
4229static int bond_ethtool_get_settings(struct net_device *bond_dev,
4230 struct ethtool_cmd *ecmd)
4231{
4232 struct bonding *bond = netdev_priv(bond_dev);
4233 struct slave *slave;
4234 int i;
4235 unsigned long speed = 0;
4236
4237 ecmd->duplex = DUPLEX_UNKNOWN;
4238 ecmd->port = PORT_OTHER;
4239
4240
4241
4242
4243
4244
4245 read_lock(&bond->lock);
4246 bond_for_each_slave(bond, slave, i) {
4247 if (SLAVE_IS_OK(slave)) {
4248 if (slave->speed != SPEED_UNKNOWN)
4249 speed += slave->speed;
4250 if (ecmd->duplex == DUPLEX_UNKNOWN &&
4251 slave->duplex != DUPLEX_UNKNOWN)
4252 ecmd->duplex = slave->duplex;
4253 }
4254 }
4255 ethtool_cmd_speed_set(ecmd, speed ? : SPEED_UNKNOWN);
4256 read_unlock(&bond->lock);
4257 return 0;
4258}
4259
4260static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4261 struct ethtool_drvinfo *drvinfo)
4262{
4263 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
4264 strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
4265 snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), "%d",
4266 BOND_ABI_VERSION);
4267}
4268
4269static const struct ethtool_ops bond_ethtool_ops = {
4270 .get_drvinfo = bond_ethtool_get_drvinfo,
4271 .get_settings = bond_ethtool_get_settings,
4272 .get_link = ethtool_op_get_link,
4273};
4274
4275static const struct net_device_ops bond_netdev_ops = {
4276 .ndo_init = bond_init,
4277 .ndo_uninit = bond_uninit,
4278 .ndo_open = bond_open,
4279 .ndo_stop = bond_close,
4280 .ndo_start_xmit = bond_start_xmit,
4281 .ndo_select_queue = bond_select_queue,
4282 .ndo_get_stats64 = bond_get_stats,
4283 .ndo_do_ioctl = bond_do_ioctl,
4284 .ndo_change_rx_flags = bond_change_rx_flags,
4285 .ndo_set_rx_mode = bond_set_rx_mode,
4286 .ndo_change_mtu = bond_change_mtu,
4287 .ndo_set_mac_address = bond_set_mac_address,
4288 .ndo_neigh_setup = bond_neigh_setup,
4289 .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid,
4290 .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid,
4291#ifdef CONFIG_NET_POLL_CONTROLLER
4292 .ndo_netpoll_setup = bond_netpoll_setup,
4293 .ndo_netpoll_cleanup = bond_netpoll_cleanup,
4294 .ndo_poll_controller = bond_poll_controller,
4295#endif
4296 .ndo_add_slave = bond_enslave,
4297 .ndo_del_slave = bond_release,
4298 .ndo_fix_features = bond_fix_features,
4299};
4300
4301static const struct device_type bond_type = {
4302 .name = "bond",
4303};
4304
4305static void bond_destructor(struct net_device *bond_dev)
4306{
4307 struct bonding *bond = netdev_priv(bond_dev);
4308 if (bond->wq)
4309 destroy_workqueue(bond->wq);
4310 free_netdev(bond_dev);
4311}
4312
4313static void bond_setup(struct net_device *bond_dev)
4314{
4315 struct bonding *bond = netdev_priv(bond_dev);
4316
4317
4318 rwlock_init(&bond->lock);
4319 rwlock_init(&bond->curr_slave_lock);
4320
4321 bond->params = bonding_defaults;
4322
4323
4324 bond->dev = bond_dev;
4325 INIT_LIST_HEAD(&bond->vlan_list);
4326
4327
4328 ether_setup(bond_dev);
4329 bond_dev->netdev_ops = &bond_netdev_ops;
4330 bond_dev->ethtool_ops = &bond_ethtool_ops;
4331 bond_set_mode_ops(bond, bond->params.mode);
4332
4333 bond_dev->destructor = bond_destructor;
4334
4335 SET_NETDEV_DEVTYPE(bond_dev, &bond_type);
4336
4337
4338 bond_dev->tx_queue_len = 0;
4339 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
4340 bond_dev->priv_flags |= IFF_BONDING;
4341 bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
4342
4343
4344
4345
4346
4347
4348 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4349
4350
4351
4352 bond_dev->features |= NETIF_F_LLTX;
4353
4354
4355
4356
4357
4358
4359
4360
4361 bond_dev->hw_features = BOND_VLAN_FEATURES |
4362 NETIF_F_HW_VLAN_CTAG_TX |
4363 NETIF_F_HW_VLAN_CTAG_RX |
4364 NETIF_F_HW_VLAN_CTAG_FILTER;
4365
4366 bond_dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
4367 bond_dev->features |= bond_dev->hw_features;
4368}
4369
4370
4371
4372
4373
4374static void bond_uninit(struct net_device *bond_dev)
4375{
4376 struct bonding *bond = netdev_priv(bond_dev);
4377 struct vlan_entry *vlan, *tmp;
4378
4379 bond_netpoll_cleanup(bond_dev);
4380
4381
4382 while (bond->first_slave != NULL)
4383 __bond_release_one(bond_dev, bond->first_slave->dev, true);
4384 pr_info("%s: released all slaves\n", bond_dev->name);
4385
4386 list_del(&bond->bond_list);
4387
4388 bond_debug_unregister(bond);
4389
4390 list_for_each_entry_safe(vlan, tmp, &bond->vlan_list, vlan_list) {
4391 list_del(&vlan->vlan_list);
4392 kfree(vlan);
4393 }
4394}
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl)
4405{
4406 int modeint = -1, i, rv;
4407 char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };
4408
4409 for (p = (char *)buf; *p; p++)
4410 if (!(isdigit(*p) || isspace(*p)))
4411 break;
4412
4413 if (*p)
4414 rv = sscanf(buf, "%20s", modestr);
4415 else
4416 rv = sscanf(buf, "%d", &modeint);
4417
4418 if (!rv)
4419 return -1;
4420
4421 for (i = 0; tbl[i].modename; i++) {
4422 if (modeint == tbl[i].mode)
4423 return tbl[i].mode;
4424 if (strcmp(modestr, tbl[i].modename) == 0)
4425 return tbl[i].mode;
4426 }
4427
4428 return -1;
4429}
4430
4431static int bond_check_params(struct bond_params *params)
4432{
4433 int arp_validate_value, fail_over_mac_value, primary_reselect_value, i;
4434 int arp_all_targets_value;
4435
4436
4437
4438
4439 if (mode) {
4440 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4441 if (bond_mode == -1) {
4442 pr_err("Error: Invalid bonding mode \"%s\"\n",
4443 mode == NULL ? "NULL" : mode);
4444 return -EINVAL;
4445 }
4446 }
4447
4448 if (xmit_hash_policy) {
4449 if ((bond_mode != BOND_MODE_XOR) &&
4450 (bond_mode != BOND_MODE_8023AD)) {
4451 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
4452 bond_mode_name(bond_mode));
4453 } else {
4454 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4455 xmit_hashtype_tbl);
4456 if (xmit_hashtype == -1) {
4457 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4458 xmit_hash_policy == NULL ? "NULL" :
4459 xmit_hash_policy);
4460 return -EINVAL;
4461 }
4462 }
4463 }
4464
4465 if (lacp_rate) {
4466 if (bond_mode != BOND_MODE_8023AD) {
4467 pr_info("lacp_rate param is irrelevant in mode %s\n",
4468 bond_mode_name(bond_mode));
4469 } else {
4470 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4471 if (lacp_fast == -1) {
4472 pr_err("Error: Invalid lacp rate \"%s\"\n",
4473 lacp_rate == NULL ? "NULL" : lacp_rate);
4474 return -EINVAL;
4475 }
4476 }
4477 }
4478
4479 if (ad_select) {
4480 params->ad_select = bond_parse_parm(ad_select, ad_select_tbl);
4481 if (params->ad_select == -1) {
4482 pr_err("Error: Invalid ad_select \"%s\"\n",
4483 ad_select == NULL ? "NULL" : ad_select);
4484 return -EINVAL;
4485 }
4486
4487 if (bond_mode != BOND_MODE_8023AD) {
4488 pr_warning("ad_select param only affects 802.3ad mode\n");
4489 }
4490 } else {
4491 params->ad_select = BOND_AD_STABLE;
4492 }
4493
4494 if (max_bonds < 0) {
4495 pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4496 max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
4497 max_bonds = BOND_DEFAULT_MAX_BONDS;
4498 }
4499
4500 if (miimon < 0) {
4501 pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n",
4502 miimon, INT_MAX, BOND_LINK_MON_INTERV);
4503 miimon = BOND_LINK_MON_INTERV;
4504 }
4505
4506 if (updelay < 0) {
4507 pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4508 updelay, INT_MAX);
4509 updelay = 0;
4510 }
4511
4512 if (downdelay < 0) {
4513 pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4514 downdelay, INT_MAX);
4515 downdelay = 0;
4516 }
4517
4518 if ((use_carrier != 0) && (use_carrier != 1)) {
4519 pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4520 use_carrier);
4521 use_carrier = 1;
4522 }
4523
4524 if (num_peer_notif < 0 || num_peer_notif > 255) {
4525 pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4526 num_peer_notif);
4527 num_peer_notif = 1;
4528 }
4529
4530
4531 if (bond_mode == BOND_MODE_8023AD) {
4532 if (!miimon) {
4533 pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure, speed and duplex which are essential for 802.3ad operation\n");
4534 pr_warning("Forcing miimon to 100msec\n");
4535 miimon = 100;
4536 }
4537 }
4538
4539 if (tx_queues < 1 || tx_queues > 255) {
4540 pr_warning("Warning: tx_queues (%d) should be between "
4541 "1 and 255, resetting to %d\n",
4542 tx_queues, BOND_DEFAULT_TX_QUEUES);
4543 tx_queues = BOND_DEFAULT_TX_QUEUES;
4544 }
4545
4546 if ((all_slaves_active != 0) && (all_slaves_active != 1)) {
4547 pr_warning("Warning: all_slaves_active module parameter (%d), "
4548 "not of valid value (0/1), so it was set to "
4549 "0\n", all_slaves_active);
4550 all_slaves_active = 0;
4551 }
4552
4553 if (resend_igmp < 0 || resend_igmp > 255) {
4554 pr_warning("Warning: resend_igmp (%d) should be between "
4555 "0 and 255, resetting to %d\n",
4556 resend_igmp, BOND_DEFAULT_RESEND_IGMP);
4557 resend_igmp = BOND_DEFAULT_RESEND_IGMP;
4558 }
4559
4560
4561 if ((bond_mode == BOND_MODE_TLB) ||
4562 (bond_mode == BOND_MODE_ALB)) {
4563 if (!miimon) {
4564 pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure and link speed which are essential for TLB/ALB load balancing\n");
4565 pr_warning("Forcing miimon to 100msec\n");
4566 miimon = 100;
4567 }
4568 }
4569
4570 if (bond_mode == BOND_MODE_ALB) {
4571 pr_notice("In ALB mode you might experience client disconnections upon reconnection of a link if the bonding module updelay parameter (%d msec) is incompatible with the forwarding delay time of the switch\n",
4572 updelay);
4573 }
4574
4575 if (!miimon) {
4576 if (updelay || downdelay) {
4577
4578
4579
4580 pr_warning("Warning: miimon module parameter not set and updelay (%d) or downdelay (%d) module parameter is set; updelay and downdelay have no effect unless miimon is set\n",
4581 updelay, downdelay);
4582 }
4583 } else {
4584
4585 if (arp_interval) {
4586 pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4587 miimon, arp_interval);
4588 arp_interval = 0;
4589 }
4590
4591 if ((updelay % miimon) != 0) {
4592 pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4593 updelay, miimon,
4594 (updelay / miimon) * miimon);
4595 }
4596
4597 updelay /= miimon;
4598
4599 if ((downdelay % miimon) != 0) {
4600 pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4601 downdelay, miimon,
4602 (downdelay / miimon) * miimon);
4603 }
4604
4605 downdelay /= miimon;
4606 }
4607
4608 if (arp_interval < 0) {
4609 pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n",
4610 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
4611 arp_interval = BOND_LINK_ARP_INTERV;
4612 }
4613
4614 for (arp_ip_count = 0, i = 0;
4615 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[i]; i++) {
4616
4617
4618 __be32 ip = in_aton(arp_ip_target[i]);
4619 if (!isdigit(arp_ip_target[i][0]) || ip == 0 ||
4620 ip == htonl(INADDR_BROADCAST)) {
4621 pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
4622 arp_ip_target[i]);
4623 arp_interval = 0;
4624 } else {
4625 if (bond_get_targets_ip(arp_target, ip) == -1)
4626 arp_target[arp_ip_count++] = ip;
4627 else
4628 pr_warning("Warning: duplicate address %pI4 in arp_ip_target, skipping\n",
4629 &ip);
4630 }
4631 }
4632
4633 if (arp_interval && !arp_ip_count) {
4634
4635 pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
4636 arp_interval);
4637 arp_interval = 0;
4638 }
4639
4640 if (arp_validate) {
4641 if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
4642 pr_err("arp_validate only supported in active-backup mode\n");
4643 return -EINVAL;
4644 }
4645 if (!arp_interval) {
4646 pr_err("arp_validate requires arp_interval\n");
4647 return -EINVAL;
4648 }
4649
4650 arp_validate_value = bond_parse_parm(arp_validate,
4651 arp_validate_tbl);
4652 if (arp_validate_value == -1) {
4653 pr_err("Error: invalid arp_validate \"%s\"\n",
4654 arp_validate == NULL ? "NULL" : arp_validate);
4655 return -EINVAL;
4656 }
4657 } else
4658 arp_validate_value = 0;
4659
4660 arp_all_targets_value = 0;
4661 if (arp_all_targets) {
4662 arp_all_targets_value = bond_parse_parm(arp_all_targets,
4663 arp_all_targets_tbl);
4664
4665 if (arp_all_targets_value == -1) {
4666 pr_err("Error: invalid arp_all_targets_value \"%s\"\n",
4667 arp_all_targets);
4668 arp_all_targets_value = 0;
4669 }
4670 }
4671
4672 if (miimon) {
4673 pr_info("MII link monitoring set to %d ms\n", miimon);
4674 } else if (arp_interval) {
4675 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
4676 arp_interval,
4677 arp_validate_tbl[arp_validate_value].modename,
4678 arp_ip_count);
4679
4680 for (i = 0; i < arp_ip_count; i++)
4681 pr_info(" %s", arp_ip_target[i]);
4682
4683 pr_info("\n");
4684
4685 } else if (max_bonds) {
4686
4687
4688
4689 pr_debug("Warning: either miimon or arp_interval and arp_ip_target module parameters must be specified, otherwise bonding will not detect link failures! see bonding.txt for details.\n");
4690 }
4691
4692 if (primary && !USES_PRIMARY(bond_mode)) {
4693
4694
4695
4696 pr_warning("Warning: %s primary device specified but has no effect in %s mode\n",
4697 primary, bond_mode_name(bond_mode));
4698 primary = NULL;
4699 }
4700
4701 if (primary && primary_reselect) {
4702 primary_reselect_value = bond_parse_parm(primary_reselect,
4703 pri_reselect_tbl);
4704 if (primary_reselect_value == -1) {
4705 pr_err("Error: Invalid primary_reselect \"%s\"\n",
4706 primary_reselect ==
4707 NULL ? "NULL" : primary_reselect);
4708 return -EINVAL;
4709 }
4710 } else {
4711 primary_reselect_value = BOND_PRI_RESELECT_ALWAYS;
4712 }
4713
4714 if (fail_over_mac) {
4715 fail_over_mac_value = bond_parse_parm(fail_over_mac,
4716 fail_over_mac_tbl);
4717 if (fail_over_mac_value == -1) {
4718 pr_err("Error: invalid fail_over_mac \"%s\"\n",
4719 arp_validate == NULL ? "NULL" : arp_validate);
4720 return -EINVAL;
4721 }
4722
4723 if (bond_mode != BOND_MODE_ACTIVEBACKUP)
4724 pr_warning("Warning: fail_over_mac only affects active-backup mode.\n");
4725 } else {
4726 fail_over_mac_value = BOND_FOM_NONE;
4727 }
4728
4729
4730 params->mode = bond_mode;
4731 params->xmit_policy = xmit_hashtype;
4732 params->miimon = miimon;
4733 params->num_peer_notif = num_peer_notif;
4734 params->arp_interval = arp_interval;
4735 params->arp_validate = arp_validate_value;
4736 params->arp_all_targets = arp_all_targets_value;
4737 params->updelay = updelay;
4738 params->downdelay = downdelay;
4739 params->use_carrier = use_carrier;
4740 params->lacp_fast = lacp_fast;
4741 params->primary[0] = 0;
4742 params->primary_reselect = primary_reselect_value;
4743 params->fail_over_mac = fail_over_mac_value;
4744 params->tx_queues = tx_queues;
4745 params->all_slaves_active = all_slaves_active;
4746 params->resend_igmp = resend_igmp;
4747 params->min_links = min_links;
4748
4749 if (primary) {
4750 strncpy(params->primary, primary, IFNAMSIZ);
4751 params->primary[IFNAMSIZ - 1] = 0;
4752 }
4753
4754 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
4755
4756 return 0;
4757}
4758
4759static struct lock_class_key bonding_netdev_xmit_lock_key;
4760static struct lock_class_key bonding_netdev_addr_lock_key;
4761static struct lock_class_key bonding_tx_busylock_key;
4762
4763static void bond_set_lockdep_class_one(struct net_device *dev,
4764 struct netdev_queue *txq,
4765 void *_unused)
4766{
4767 lockdep_set_class(&txq->_xmit_lock,
4768 &bonding_netdev_xmit_lock_key);
4769}
4770
4771static void bond_set_lockdep_class(struct net_device *dev)
4772{
4773 lockdep_set_class(&dev->addr_list_lock,
4774 &bonding_netdev_addr_lock_key);
4775 netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL);
4776 dev->qdisc_tx_busylock = &bonding_tx_busylock_key;
4777}
4778
4779
4780
4781
4782static int bond_init(struct net_device *bond_dev)
4783{
4784 struct bonding *bond = netdev_priv(bond_dev);
4785 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
4786 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
4787
4788 pr_debug("Begin bond_init for %s\n", bond_dev->name);
4789
4790
4791
4792
4793
4794
4795
4796 spin_lock_init(&(bond_info->tx_hashtbl_lock));
4797 spin_lock_init(&(bond_info->rx_hashtbl_lock));
4798
4799 bond->wq = create_singlethread_workqueue(bond_dev->name);
4800 if (!bond->wq)
4801 return -ENOMEM;
4802
4803 bond_set_lockdep_class(bond_dev);
4804
4805 list_add_tail(&bond->bond_list, &bn->dev_list);
4806
4807 bond_prepare_sysfs_group(bond);
4808
4809 bond_debug_register(bond);
4810
4811
4812 if (is_zero_ether_addr(bond_dev->dev_addr) &&
4813 bond_dev->addr_assign_type == NET_ADDR_PERM)
4814 eth_hw_addr_random(bond_dev);
4815
4816 return 0;
4817}
4818
4819static int bond_validate(struct nlattr *tb[], struct nlattr *data[])
4820{
4821 if (tb[IFLA_ADDRESS]) {
4822 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
4823 return -EINVAL;
4824 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
4825 return -EADDRNOTAVAIL;
4826 }
4827 return 0;
4828}
4829
4830static unsigned int bond_get_num_tx_queues(void)
4831{
4832 return tx_queues;
4833}
4834
4835static struct rtnl_link_ops bond_link_ops __read_mostly = {
4836 .kind = "bond",
4837 .priv_size = sizeof(struct bonding),
4838 .setup = bond_setup,
4839 .validate = bond_validate,
4840 .get_num_tx_queues = bond_get_num_tx_queues,
4841 .get_num_rx_queues = bond_get_num_tx_queues,
4842
4843};
4844
4845
4846
4847
4848
4849
4850int bond_create(struct net *net, const char *name)
4851{
4852 struct net_device *bond_dev;
4853 int res;
4854
4855 rtnl_lock();
4856
4857 bond_dev = alloc_netdev_mq(sizeof(struct bonding),
4858 name ? name : "bond%d",
4859 bond_setup, tx_queues);
4860 if (!bond_dev) {
4861 pr_err("%s: eek! can't alloc netdev!\n", name);
4862 rtnl_unlock();
4863 return -ENOMEM;
4864 }
4865
4866 dev_net_set(bond_dev, net);
4867 bond_dev->rtnl_link_ops = &bond_link_ops;
4868
4869 res = register_netdevice(bond_dev);
4870
4871 netif_carrier_off(bond_dev);
4872
4873 rtnl_unlock();
4874 if (res < 0)
4875 bond_destructor(bond_dev);
4876 return res;
4877}
4878
4879static int __net_init bond_net_init(struct net *net)
4880{
4881 struct bond_net *bn = net_generic(net, bond_net_id);
4882
4883 bn->net = net;
4884 INIT_LIST_HEAD(&bn->dev_list);
4885
4886 bond_create_proc_dir(bn);
4887 bond_create_sysfs(bn);
4888
4889 return 0;
4890}
4891
4892static void __net_exit bond_net_exit(struct net *net)
4893{
4894 struct bond_net *bn = net_generic(net, bond_net_id);
4895 struct bonding *bond, *tmp_bond;
4896 LIST_HEAD(list);
4897
4898 bond_destroy_sysfs(bn);
4899 bond_destroy_proc_dir(bn);
4900
4901
4902 rtnl_lock();
4903 list_for_each_entry_safe(bond, tmp_bond, &bn->dev_list, bond_list)
4904 unregister_netdevice_queue(bond->dev, &list);
4905 unregister_netdevice_many(&list);
4906 rtnl_unlock();
4907}
4908
4909static struct pernet_operations bond_net_ops = {
4910 .init = bond_net_init,
4911 .exit = bond_net_exit,
4912 .id = &bond_net_id,
4913 .size = sizeof(struct bond_net),
4914};
4915
4916static int __init bonding_init(void)
4917{
4918 int i;
4919 int res;
4920
4921 pr_info("%s", bond_version);
4922
4923 res = bond_check_params(&bonding_defaults);
4924 if (res)
4925 goto out;
4926
4927 res = register_pernet_subsys(&bond_net_ops);
4928 if (res)
4929 goto out;
4930
4931 res = rtnl_link_register(&bond_link_ops);
4932 if (res)
4933 goto err_link;
4934
4935 bond_create_debugfs();
4936
4937 for (i = 0; i < max_bonds; i++) {
4938 res = bond_create(&init_net, NULL);
4939 if (res)
4940 goto err;
4941 }
4942
4943 register_netdevice_notifier(&bond_netdev_notifier);
4944out:
4945 return res;
4946err:
4947 rtnl_link_unregister(&bond_link_ops);
4948err_link:
4949 unregister_pernet_subsys(&bond_net_ops);
4950 goto out;
4951
4952}
4953
4954static void __exit bonding_exit(void)
4955{
4956 unregister_netdevice_notifier(&bond_netdev_notifier);
4957
4958 bond_destroy_debugfs();
4959
4960 rtnl_link_unregister(&bond_link_ops);
4961 unregister_pernet_subsys(&bond_net_ops);
4962
4963#ifdef CONFIG_NET_POLL_CONTROLLER
4964
4965
4966
4967 WARN_ON(atomic_read(&netpoll_block_tx));
4968#endif
4969}
4970
4971module_init(bonding_init);
4972module_exit(bonding_exit);
4973MODULE_LICENSE("GPL");
4974MODULE_VERSION(DRV_VERSION);
4975MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
4976MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4977MODULE_ALIAS_RTNL_LINK("bond");
4978