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34#include <linux/kernel.h>
35#include <linux/module.h>
36#include <linux/types.h>
37#include <linux/fcntl.h>
38#include <linux/interrupt.h>
39#include <linux/ptrace.h>
40#include <linux/ioport.h>
41#include <linux/in.h>
42#include <net/ip.h>
43#include <linux/ip.h>
44#include <linux/icmp.h>
45#include <linux/icmpv6.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 <linux/rculist.h>
81#include <net/flow_dissector.h>
82#include <net/xfrm.h>
83#include <net/bonding.h>
84#include <net/bond_3ad.h>
85#include <net/bond_alb.h>
86
87#include "bonding_priv.h"
88
89
90
91
92
93static int max_bonds = BOND_DEFAULT_MAX_BONDS;
94static int tx_queues = BOND_DEFAULT_TX_QUEUES;
95static int num_peer_notif = 1;
96static int miimon;
97static int updelay;
98static int downdelay;
99static int use_carrier = 1;
100static char *mode;
101static char *primary;
102static char *primary_reselect;
103static char *lacp_rate;
104static int min_links;
105static char *ad_select;
106static char *xmit_hash_policy;
107static int arp_interval;
108static char *arp_ip_target[BOND_MAX_ARP_TARGETS];
109static char *arp_validate;
110static char *arp_all_targets;
111static char *fail_over_mac;
112static int all_slaves_active;
113static struct bond_params bonding_defaults;
114static int resend_igmp = BOND_DEFAULT_RESEND_IGMP;
115static int packets_per_slave = 1;
116static int lp_interval = BOND_ALB_DEFAULT_LP_INTERVAL;
117
118module_param(max_bonds, int, 0);
119MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
120module_param(tx_queues, int, 0);
121MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)");
122module_param_named(num_grat_arp, num_peer_notif, int, 0644);
123MODULE_PARM_DESC(num_grat_arp, "Number of peer notifications to send on "
124 "failover event (alias of num_unsol_na)");
125module_param_named(num_unsol_na, num_peer_notif, int, 0644);
126MODULE_PARM_DESC(num_unsol_na, "Number of peer notifications to send on "
127 "failover event (alias of num_grat_arp)");
128module_param(miimon, int, 0);
129MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
130module_param(updelay, int, 0);
131MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
132module_param(downdelay, int, 0);
133MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
134 "in milliseconds");
135module_param(use_carrier, int, 0);
136MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
137 "0 for off, 1 for on (default)");
138module_param(mode, charp, 0);
139MODULE_PARM_DESC(mode, "Mode of operation; 0 for balance-rr, "
140 "1 for active-backup, 2 for balance-xor, "
141 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
142 "6 for balance-alb");
143module_param(primary, charp, 0);
144MODULE_PARM_DESC(primary, "Primary network device to use");
145module_param(primary_reselect, charp, 0);
146MODULE_PARM_DESC(primary_reselect, "Reselect primary slave "
147 "once it comes up; "
148 "0 for always (default), "
149 "1 for only if speed of primary is "
150 "better, "
151 "2 for only on active slave "
152 "failure");
153module_param(lacp_rate, charp, 0);
154MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner; "
155 "0 for slow, 1 for fast");
156module_param(ad_select, charp, 0);
157MODULE_PARM_DESC(ad_select, "802.3ad aggregation selection logic; "
158 "0 for stable (default), 1 for bandwidth, "
159 "2 for count");
160module_param(min_links, int, 0);
161MODULE_PARM_DESC(min_links, "Minimum number of available links before turning on carrier");
162
163module_param(xmit_hash_policy, charp, 0);
164MODULE_PARM_DESC(xmit_hash_policy, "balance-alb, balance-tlb, balance-xor, 802.3ad hashing method; "
165 "0 for layer 2 (default), 1 for layer 3+4, "
166 "2 for layer 2+3, 3 for encap layer 2+3, "
167 "4 for encap layer 3+4");
168module_param(arp_interval, int, 0);
169MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
170module_param_array(arp_ip_target, charp, NULL, 0);
171MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
172module_param(arp_validate, charp, 0);
173MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes; "
174 "0 for none (default), 1 for active, "
175 "2 for backup, 3 for all");
176module_param(arp_all_targets, charp, 0);
177MODULE_PARM_DESC(arp_all_targets, "fail on any/all arp targets timeout; 0 for any (default), 1 for all");
178module_param(fail_over_mac, charp, 0);
179MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to "
180 "the same MAC; 0 for none (default), "
181 "1 for active, 2 for follow");
182module_param(all_slaves_active, int, 0);
183MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface "
184 "by setting active flag for all slaves; "
185 "0 for never (default), 1 for always.");
186module_param(resend_igmp, int, 0);
187MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on "
188 "link failure");
189module_param(packets_per_slave, int, 0);
190MODULE_PARM_DESC(packets_per_slave, "Packets to send per slave in balance-rr "
191 "mode; 0 for a random slave, 1 packet per "
192 "slave (default), >1 packets per slave.");
193module_param(lp_interval, uint, 0);
194MODULE_PARM_DESC(lp_interval, "The number of seconds between instances where "
195 "the bonding driver sends learning packets to "
196 "each slaves peer switch. The default is 1.");
197
198
199
200#ifdef CONFIG_NET_POLL_CONTROLLER
201atomic_t netpoll_block_tx = ATOMIC_INIT(0);
202#endif
203
204unsigned int bond_net_id __read_mostly;
205
206static const struct flow_dissector_key flow_keys_bonding_keys[] = {
207 {
208 .key_id = FLOW_DISSECTOR_KEY_CONTROL,
209 .offset = offsetof(struct flow_keys, control),
210 },
211 {
212 .key_id = FLOW_DISSECTOR_KEY_BASIC,
213 .offset = offsetof(struct flow_keys, basic),
214 },
215 {
216 .key_id = FLOW_DISSECTOR_KEY_IPV4_ADDRS,
217 .offset = offsetof(struct flow_keys, addrs.v4addrs),
218 },
219 {
220 .key_id = FLOW_DISSECTOR_KEY_IPV6_ADDRS,
221 .offset = offsetof(struct flow_keys, addrs.v6addrs),
222 },
223 {
224 .key_id = FLOW_DISSECTOR_KEY_TIPC,
225 .offset = offsetof(struct flow_keys, addrs.tipckey),
226 },
227 {
228 .key_id = FLOW_DISSECTOR_KEY_PORTS,
229 .offset = offsetof(struct flow_keys, ports),
230 },
231 {
232 .key_id = FLOW_DISSECTOR_KEY_ICMP,
233 .offset = offsetof(struct flow_keys, icmp),
234 },
235 {
236 .key_id = FLOW_DISSECTOR_KEY_VLAN,
237 .offset = offsetof(struct flow_keys, vlan),
238 },
239 {
240 .key_id = FLOW_DISSECTOR_KEY_FLOW_LABEL,
241 .offset = offsetof(struct flow_keys, tags),
242 },
243 {
244 .key_id = FLOW_DISSECTOR_KEY_GRE_KEYID,
245 .offset = offsetof(struct flow_keys, keyid),
246 },
247};
248
249static struct flow_dissector flow_keys_bonding __read_mostly;
250
251
252
253static int bond_init(struct net_device *bond_dev);
254static void bond_uninit(struct net_device *bond_dev);
255static void bond_get_stats(struct net_device *bond_dev,
256 struct rtnl_link_stats64 *stats);
257static void bond_slave_arr_handler(struct work_struct *work);
258static bool bond_time_in_interval(struct bonding *bond, unsigned long last_act,
259 int mod);
260static void bond_netdev_notify_work(struct work_struct *work);
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 < BOND_MODE_ROUNDROBIN || mode > BOND_MODE_ALB)
277 return "unknown";
278
279 return names[mode];
280}
281
282
283
284
285
286
287
288
289netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
290 struct net_device *slave_dev)
291{
292 skb->dev = slave_dev;
293
294 BUILD_BUG_ON(sizeof(skb->queue_mapping) !=
295 sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping));
296 skb_set_queue_mapping(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping);
297
298 if (unlikely(netpoll_tx_running(bond->dev)))
299 return bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb);
300
301 return dev_queue_xmit(skb);
302}
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327
328static int bond_vlan_rx_add_vid(struct net_device *bond_dev,
329 __be16 proto, u16 vid)
330{
331 struct bonding *bond = netdev_priv(bond_dev);
332 struct slave *slave, *rollback_slave;
333 struct list_head *iter;
334 int res;
335
336 bond_for_each_slave(bond, slave, iter) {
337 res = vlan_vid_add(slave->dev, proto, vid);
338 if (res)
339 goto unwind;
340 }
341
342 return 0;
343
344unwind:
345
346 bond_for_each_slave(bond, rollback_slave, iter) {
347 if (rollback_slave == slave)
348 break;
349
350 vlan_vid_del(rollback_slave->dev, proto, vid);
351 }
352
353 return res;
354}
355
356
357
358
359
360
361
362static int bond_vlan_rx_kill_vid(struct net_device *bond_dev,
363 __be16 proto, u16 vid)
364{
365 struct bonding *bond = netdev_priv(bond_dev);
366 struct list_head *iter;
367 struct slave *slave;
368
369 bond_for_each_slave(bond, slave, iter)
370 vlan_vid_del(slave->dev, proto, vid);
371
372 if (bond_is_lb(bond))
373 bond_alb_clear_vlan(bond, vid);
374
375 return 0;
376}
377
378
379
380#ifdef CONFIG_XFRM_OFFLOAD
381
382
383
384
385static int bond_ipsec_add_sa(struct xfrm_state *xs)
386{
387 struct net_device *bond_dev = xs->xso.dev;
388 struct bonding *bond;
389 struct slave *slave;
390
391 if (!bond_dev)
392 return -EINVAL;
393
394 bond = netdev_priv(bond_dev);
395 slave = rcu_dereference(bond->curr_active_slave);
396 xs->xso.real_dev = slave->dev;
397 bond->xs = xs;
398
399 if (!(slave->dev->xfrmdev_ops
400 && slave->dev->xfrmdev_ops->xdo_dev_state_add)) {
401 slave_warn(bond_dev, slave->dev, "Slave does not support ipsec offload\n");
402 return -EINVAL;
403 }
404
405 return slave->dev->xfrmdev_ops->xdo_dev_state_add(xs);
406}
407
408
409
410
411
412static void bond_ipsec_del_sa(struct xfrm_state *xs)
413{
414 struct net_device *bond_dev = xs->xso.dev;
415 struct bonding *bond;
416 struct slave *slave;
417
418 if (!bond_dev)
419 return;
420
421 bond = netdev_priv(bond_dev);
422 slave = rcu_dereference(bond->curr_active_slave);
423
424 if (!slave)
425 return;
426
427 xs->xso.real_dev = slave->dev;
428
429 if (!(slave->dev->xfrmdev_ops
430 && slave->dev->xfrmdev_ops->xdo_dev_state_delete)) {
431 slave_warn(bond_dev, slave->dev, "%s: no slave xdo_dev_state_delete\n", __func__);
432 return;
433 }
434
435 slave->dev->xfrmdev_ops->xdo_dev_state_delete(xs);
436}
437
438
439
440
441
442
443static bool bond_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs)
444{
445 struct net_device *bond_dev = xs->xso.dev;
446 struct bonding *bond = netdev_priv(bond_dev);
447 struct slave *curr_active = rcu_dereference(bond->curr_active_slave);
448 struct net_device *slave_dev = curr_active->dev;
449
450 if (BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP)
451 return true;
452
453 if (!(slave_dev->xfrmdev_ops
454 && slave_dev->xfrmdev_ops->xdo_dev_offload_ok)) {
455 slave_warn(bond_dev, slave_dev, "%s: no slave xdo_dev_offload_ok\n", __func__);
456 return false;
457 }
458
459 xs->xso.real_dev = slave_dev;
460 return slave_dev->xfrmdev_ops->xdo_dev_offload_ok(skb, xs);
461}
462
463static const struct xfrmdev_ops bond_xfrmdev_ops = {
464 .xdo_dev_state_add = bond_ipsec_add_sa,
465 .xdo_dev_state_delete = bond_ipsec_del_sa,
466 .xdo_dev_offload_ok = bond_ipsec_offload_ok,
467};
468#endif
469
470
471
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476
477
478int bond_set_carrier(struct bonding *bond)
479{
480 struct list_head *iter;
481 struct slave *slave;
482
483 if (!bond_has_slaves(bond))
484 goto down;
485
486 if (BOND_MODE(bond) == BOND_MODE_8023AD)
487 return bond_3ad_set_carrier(bond);
488
489 bond_for_each_slave(bond, slave, iter) {
490 if (slave->link == BOND_LINK_UP) {
491 if (!netif_carrier_ok(bond->dev)) {
492 netif_carrier_on(bond->dev);
493 return 1;
494 }
495 return 0;
496 }
497 }
498
499down:
500 if (netif_carrier_ok(bond->dev)) {
501 netif_carrier_off(bond->dev);
502 return 1;
503 }
504 return 0;
505}
506
507
508
509
510
511
512
513static int bond_update_speed_duplex(struct slave *slave)
514{
515 struct net_device *slave_dev = slave->dev;
516 struct ethtool_link_ksettings ecmd;
517 int res;
518
519 slave->speed = SPEED_UNKNOWN;
520 slave->duplex = DUPLEX_UNKNOWN;
521
522 res = __ethtool_get_link_ksettings(slave_dev, &ecmd);
523 if (res < 0)
524 return 1;
525 if (ecmd.base.speed == 0 || ecmd.base.speed == ((__u32)-1))
526 return 1;
527 switch (ecmd.base.duplex) {
528 case DUPLEX_FULL:
529 case DUPLEX_HALF:
530 break;
531 default:
532 return 1;
533 }
534
535 slave->speed = ecmd.base.speed;
536 slave->duplex = ecmd.base.duplex;
537
538 return 0;
539}
540
541const char *bond_slave_link_status(s8 link)
542{
543 switch (link) {
544 case BOND_LINK_UP:
545 return "up";
546 case BOND_LINK_FAIL:
547 return "going down";
548 case BOND_LINK_DOWN:
549 return "down";
550 case BOND_LINK_BACK:
551 return "going back";
552 default:
553 return "unknown";
554 }
555}
556
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570
571
572static int bond_check_dev_link(struct bonding *bond,
573 struct net_device *slave_dev, int reporting)
574{
575 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
576 int (*ioctl)(struct net_device *, struct ifreq *, int);
577 struct ifreq ifr;
578 struct mii_ioctl_data *mii;
579
580 if (!reporting && !netif_running(slave_dev))
581 return 0;
582
583 if (bond->params.use_carrier)
584 return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
585
586
587 if (slave_dev->ethtool_ops->get_link)
588 return slave_dev->ethtool_ops->get_link(slave_dev) ?
589 BMSR_LSTATUS : 0;
590
591
592 ioctl = slave_ops->ndo_do_ioctl;
593 if (ioctl) {
594
595
596
597
598
599
600
601
602
603
604
605
606
607 strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
608 mii = if_mii(&ifr);
609 if (ioctl(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
610 mii->reg_num = MII_BMSR;
611 if (ioctl(slave_dev, &ifr, SIOCGMIIREG) == 0)
612 return mii->val_out & BMSR_LSTATUS;
613 }
614 }
615
616
617
618
619
620
621 return reporting ? -1 : BMSR_LSTATUS;
622}
623
624
625
626
627static int bond_set_promiscuity(struct bonding *bond, int inc)
628{
629 struct list_head *iter;
630 int err = 0;
631
632 if (bond_uses_primary(bond)) {
633 struct slave *curr_active = rtnl_dereference(bond->curr_active_slave);
634
635 if (curr_active)
636 err = dev_set_promiscuity(curr_active->dev, inc);
637 } else {
638 struct slave *slave;
639
640 bond_for_each_slave(bond, slave, iter) {
641 err = dev_set_promiscuity(slave->dev, inc);
642 if (err)
643 return err;
644 }
645 }
646 return err;
647}
648
649
650static int bond_set_allmulti(struct bonding *bond, int inc)
651{
652 struct list_head *iter;
653 int err = 0;
654
655 if (bond_uses_primary(bond)) {
656 struct slave *curr_active = rtnl_dereference(bond->curr_active_slave);
657
658 if (curr_active)
659 err = dev_set_allmulti(curr_active->dev, inc);
660 } else {
661 struct slave *slave;
662
663 bond_for_each_slave(bond, slave, iter) {
664 err = dev_set_allmulti(slave->dev, inc);
665 if (err)
666 return err;
667 }
668 }
669 return err;
670}
671
672
673
674
675
676static void bond_resend_igmp_join_requests_delayed(struct work_struct *work)
677{
678 struct bonding *bond = container_of(work, struct bonding,
679 mcast_work.work);
680
681 if (!rtnl_trylock()) {
682 queue_delayed_work(bond->wq, &bond->mcast_work, 1);
683 return;
684 }
685 call_netdevice_notifiers(NETDEV_RESEND_IGMP, bond->dev);
686
687 if (bond->igmp_retrans > 1) {
688 bond->igmp_retrans--;
689 queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5);
690 }
691 rtnl_unlock();
692}
693
694
695static void bond_hw_addr_flush(struct net_device *bond_dev,
696 struct net_device *slave_dev)
697{
698 struct bonding *bond = netdev_priv(bond_dev);
699
700 dev_uc_unsync(slave_dev, bond_dev);
701 dev_mc_unsync(slave_dev, bond_dev);
702
703 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
704
705 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
706
707 dev_mc_del(slave_dev, lacpdu_multicast);
708 }
709}
710
711
712
713
714
715
716
717
718static void bond_hw_addr_swap(struct bonding *bond, struct slave *new_active,
719 struct slave *old_active)
720{
721 if (old_active) {
722 if (bond->dev->flags & IFF_PROMISC)
723 dev_set_promiscuity(old_active->dev, -1);
724
725 if (bond->dev->flags & IFF_ALLMULTI)
726 dev_set_allmulti(old_active->dev, -1);
727
728 bond_hw_addr_flush(bond->dev, old_active->dev);
729 }
730
731 if (new_active) {
732
733 if (bond->dev->flags & IFF_PROMISC)
734 dev_set_promiscuity(new_active->dev, 1);
735
736 if (bond->dev->flags & IFF_ALLMULTI)
737 dev_set_allmulti(new_active->dev, 1);
738
739 netif_addr_lock_bh(bond->dev);
740 dev_uc_sync(new_active->dev, bond->dev);
741 dev_mc_sync(new_active->dev, bond->dev);
742 netif_addr_unlock_bh(bond->dev);
743 }
744}
745
746
747
748
749
750
751
752
753static int bond_set_dev_addr(struct net_device *bond_dev,
754 struct net_device *slave_dev)
755{
756 int err;
757
758 slave_dbg(bond_dev, slave_dev, "bond_dev=%p slave_dev=%p slave_dev->addr_len=%d\n",
759 bond_dev, slave_dev, slave_dev->addr_len);
760 err = dev_pre_changeaddr_notify(bond_dev, slave_dev->dev_addr, NULL);
761 if (err)
762 return err;
763
764 memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
765 bond_dev->addr_assign_type = NET_ADDR_STOLEN;
766 call_netdevice_notifiers(NETDEV_CHANGEADDR, bond_dev);
767 return 0;
768}
769
770static struct slave *bond_get_old_active(struct bonding *bond,
771 struct slave *new_active)
772{
773 struct slave *slave;
774 struct list_head *iter;
775
776 bond_for_each_slave(bond, slave, iter) {
777 if (slave == new_active)
778 continue;
779
780 if (ether_addr_equal(bond->dev->dev_addr, slave->dev->dev_addr))
781 return slave;
782 }
783
784 return NULL;
785}
786
787
788
789
790
791
792
793static void bond_do_fail_over_mac(struct bonding *bond,
794 struct slave *new_active,
795 struct slave *old_active)
796{
797 u8 tmp_mac[MAX_ADDR_LEN];
798 struct sockaddr_storage ss;
799 int rv;
800
801 switch (bond->params.fail_over_mac) {
802 case BOND_FOM_ACTIVE:
803 if (new_active) {
804 rv = bond_set_dev_addr(bond->dev, new_active->dev);
805 if (rv)
806 slave_err(bond->dev, new_active->dev, "Error %d setting bond MAC from slave\n",
807 -rv);
808 }
809 break;
810 case BOND_FOM_FOLLOW:
811
812
813
814
815 if (!new_active)
816 return;
817
818 if (!old_active)
819 old_active = bond_get_old_active(bond, new_active);
820
821 if (old_active) {
822 bond_hw_addr_copy(tmp_mac, new_active->dev->dev_addr,
823 new_active->dev->addr_len);
824 bond_hw_addr_copy(ss.__data,
825 old_active->dev->dev_addr,
826 old_active->dev->addr_len);
827 ss.ss_family = new_active->dev->type;
828 } else {
829 bond_hw_addr_copy(ss.__data, bond->dev->dev_addr,
830 bond->dev->addr_len);
831 ss.ss_family = bond->dev->type;
832 }
833
834 rv = dev_set_mac_address(new_active->dev,
835 (struct sockaddr *)&ss, NULL);
836 if (rv) {
837 slave_err(bond->dev, new_active->dev, "Error %d setting MAC of new active slave\n",
838 -rv);
839 goto out;
840 }
841
842 if (!old_active)
843 goto out;
844
845 bond_hw_addr_copy(ss.__data, tmp_mac,
846 new_active->dev->addr_len);
847 ss.ss_family = old_active->dev->type;
848
849 rv = dev_set_mac_address(old_active->dev,
850 (struct sockaddr *)&ss, NULL);
851 if (rv)
852 slave_err(bond->dev, old_active->dev, "Error %d setting MAC of old active slave\n",
853 -rv);
854out:
855 break;
856 default:
857 netdev_err(bond->dev, "bond_do_fail_over_mac impossible: bad policy %d\n",
858 bond->params.fail_over_mac);
859 break;
860 }
861
862}
863
864static struct slave *bond_choose_primary_or_current(struct bonding *bond)
865{
866 struct slave *prim = rtnl_dereference(bond->primary_slave);
867 struct slave *curr = rtnl_dereference(bond->curr_active_slave);
868
869 if (!prim || prim->link != BOND_LINK_UP) {
870 if (!curr || curr->link != BOND_LINK_UP)
871 return NULL;
872 return curr;
873 }
874
875 if (bond->force_primary) {
876 bond->force_primary = false;
877 return prim;
878 }
879
880 if (!curr || curr->link != BOND_LINK_UP)
881 return prim;
882
883
884 switch (bond->params.primary_reselect) {
885 case BOND_PRI_RESELECT_ALWAYS:
886 return prim;
887 case BOND_PRI_RESELECT_BETTER:
888 if (prim->speed < curr->speed)
889 return curr;
890 if (prim->speed == curr->speed && prim->duplex <= curr->duplex)
891 return curr;
892 return prim;
893 case BOND_PRI_RESELECT_FAILURE:
894 return curr;
895 default:
896 netdev_err(bond->dev, "impossible primary_reselect %d\n",
897 bond->params.primary_reselect);
898 return curr;
899 }
900}
901
902
903
904
905
906static struct slave *bond_find_best_slave(struct bonding *bond)
907{
908 struct slave *slave, *bestslave = NULL;
909 struct list_head *iter;
910 int mintime = bond->params.updelay;
911
912 slave = bond_choose_primary_or_current(bond);
913 if (slave)
914 return slave;
915
916 bond_for_each_slave(bond, slave, iter) {
917 if (slave->link == BOND_LINK_UP)
918 return slave;
919 if (slave->link == BOND_LINK_BACK && bond_slave_is_up(slave) &&
920 slave->delay < mintime) {
921 mintime = slave->delay;
922 bestslave = slave;
923 }
924 }
925
926 return bestslave;
927}
928
929static bool bond_should_notify_peers(struct bonding *bond)
930{
931 struct slave *slave;
932
933 rcu_read_lock();
934 slave = rcu_dereference(bond->curr_active_slave);
935 rcu_read_unlock();
936
937 netdev_dbg(bond->dev, "bond_should_notify_peers: slave %s\n",
938 slave ? slave->dev->name : "NULL");
939
940 if (!slave || !bond->send_peer_notif ||
941 bond->send_peer_notif %
942 max(1, bond->params.peer_notif_delay) != 0 ||
943 !netif_carrier_ok(bond->dev) ||
944 test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
945 return false;
946
947 return true;
948}
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
966{
967 struct slave *old_active;
968
969 ASSERT_RTNL();
970
971 old_active = rtnl_dereference(bond->curr_active_slave);
972
973 if (old_active == new_active)
974 return;
975
976#ifdef CONFIG_XFRM_OFFLOAD
977 if (old_active && bond->xs)
978 bond_ipsec_del_sa(bond->xs);
979#endif
980
981 if (new_active) {
982 new_active->last_link_up = jiffies;
983
984 if (new_active->link == BOND_LINK_BACK) {
985 if (bond_uses_primary(bond)) {
986 slave_info(bond->dev, new_active->dev, "making interface the new active one %d ms earlier\n",
987 (bond->params.updelay - new_active->delay) * bond->params.miimon);
988 }
989
990 new_active->delay = 0;
991 bond_set_slave_link_state(new_active, BOND_LINK_UP,
992 BOND_SLAVE_NOTIFY_NOW);
993
994 if (BOND_MODE(bond) == BOND_MODE_8023AD)
995 bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
996
997 if (bond_is_lb(bond))
998 bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
999 } else {
1000 if (bond_uses_primary(bond)) {
1001 slave_info(bond->dev, new_active->dev, "making interface the new active one\n");
1002 }
1003 }
1004 }
1005
1006 if (bond_uses_primary(bond))
1007 bond_hw_addr_swap(bond, new_active, old_active);
1008
1009 if (bond_is_lb(bond)) {
1010 bond_alb_handle_active_change(bond, new_active);
1011 if (old_active)
1012 bond_set_slave_inactive_flags(old_active,
1013 BOND_SLAVE_NOTIFY_NOW);
1014 if (new_active)
1015 bond_set_slave_active_flags(new_active,
1016 BOND_SLAVE_NOTIFY_NOW);
1017 } else {
1018 rcu_assign_pointer(bond->curr_active_slave, new_active);
1019 }
1020
1021 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) {
1022 if (old_active)
1023 bond_set_slave_inactive_flags(old_active,
1024 BOND_SLAVE_NOTIFY_NOW);
1025
1026 if (new_active) {
1027 bool should_notify_peers = false;
1028
1029 bond_set_slave_active_flags(new_active,
1030 BOND_SLAVE_NOTIFY_NOW);
1031
1032 if (bond->params.fail_over_mac)
1033 bond_do_fail_over_mac(bond, new_active,
1034 old_active);
1035
1036 if (netif_running(bond->dev)) {
1037 bond->send_peer_notif =
1038 bond->params.num_peer_notif *
1039 max(1, bond->params.peer_notif_delay);
1040 should_notify_peers =
1041 bond_should_notify_peers(bond);
1042 }
1043
1044 call_netdevice_notifiers(NETDEV_BONDING_FAILOVER, bond->dev);
1045 if (should_notify_peers) {
1046 bond->send_peer_notif--;
1047 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS,
1048 bond->dev);
1049 }
1050 }
1051 }
1052
1053#ifdef CONFIG_XFRM_OFFLOAD
1054 if (new_active && bond->xs) {
1055 xfrm_dev_state_flush(dev_net(bond->dev), bond->dev, true);
1056 bond_ipsec_add_sa(bond->xs);
1057 }
1058#endif
1059
1060
1061
1062
1063
1064
1065 if (netif_running(bond->dev) && (bond->params.resend_igmp > 0) &&
1066 ((bond_uses_primary(bond) && new_active) ||
1067 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN)) {
1068 bond->igmp_retrans = bond->params.resend_igmp;
1069 queue_delayed_work(bond->wq, &bond->mcast_work, 1);
1070 }
1071}
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084void bond_select_active_slave(struct bonding *bond)
1085{
1086 struct slave *best_slave;
1087 int rv;
1088
1089 ASSERT_RTNL();
1090
1091 best_slave = bond_find_best_slave(bond);
1092 if (best_slave != rtnl_dereference(bond->curr_active_slave)) {
1093 bond_change_active_slave(bond, best_slave);
1094 rv = bond_set_carrier(bond);
1095 if (!rv)
1096 return;
1097
1098 if (netif_carrier_ok(bond->dev))
1099 netdev_info(bond->dev, "active interface up!\n");
1100 else
1101 netdev_info(bond->dev, "now running without any active interface!\n");
1102 }
1103}
1104
1105#ifdef CONFIG_NET_POLL_CONTROLLER
1106static inline int slave_enable_netpoll(struct slave *slave)
1107{
1108 struct netpoll *np;
1109 int err = 0;
1110
1111 np = kzalloc(sizeof(*np), GFP_KERNEL);
1112 err = -ENOMEM;
1113 if (!np)
1114 goto out;
1115
1116 err = __netpoll_setup(np, slave->dev);
1117 if (err) {
1118 kfree(np);
1119 goto out;
1120 }
1121 slave->np = np;
1122out:
1123 return err;
1124}
1125static inline void slave_disable_netpoll(struct slave *slave)
1126{
1127 struct netpoll *np = slave->np;
1128
1129 if (!np)
1130 return;
1131
1132 slave->np = NULL;
1133
1134 __netpoll_free(np);
1135}
1136
1137static void bond_poll_controller(struct net_device *bond_dev)
1138{
1139 struct bonding *bond = netdev_priv(bond_dev);
1140 struct slave *slave = NULL;
1141 struct list_head *iter;
1142 struct ad_info ad_info;
1143
1144 if (BOND_MODE(bond) == BOND_MODE_8023AD)
1145 if (bond_3ad_get_active_agg_info(bond, &ad_info))
1146 return;
1147
1148 bond_for_each_slave_rcu(bond, slave, iter) {
1149 if (!bond_slave_is_up(slave))
1150 continue;
1151
1152 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
1153 struct aggregator *agg =
1154 SLAVE_AD_INFO(slave)->port.aggregator;
1155
1156 if (agg &&
1157 agg->aggregator_identifier != ad_info.aggregator_id)
1158 continue;
1159 }
1160
1161 netpoll_poll_dev(slave->dev);
1162 }
1163}
1164
1165static void bond_netpoll_cleanup(struct net_device *bond_dev)
1166{
1167 struct bonding *bond = netdev_priv(bond_dev);
1168 struct list_head *iter;
1169 struct slave *slave;
1170
1171 bond_for_each_slave(bond, slave, iter)
1172 if (bond_slave_is_up(slave))
1173 slave_disable_netpoll(slave);
1174}
1175
1176static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni)
1177{
1178 struct bonding *bond = netdev_priv(dev);
1179 struct list_head *iter;
1180 struct slave *slave;
1181 int err = 0;
1182
1183 bond_for_each_slave(bond, slave, iter) {
1184 err = slave_enable_netpoll(slave);
1185 if (err) {
1186 bond_netpoll_cleanup(dev);
1187 break;
1188 }
1189 }
1190 return err;
1191}
1192#else
1193static inline int slave_enable_netpoll(struct slave *slave)
1194{
1195 return 0;
1196}
1197static inline void slave_disable_netpoll(struct slave *slave)
1198{
1199}
1200static void bond_netpoll_cleanup(struct net_device *bond_dev)
1201{
1202}
1203#endif
1204
1205
1206
1207static netdev_features_t bond_fix_features(struct net_device *dev,
1208 netdev_features_t features)
1209{
1210 struct bonding *bond = netdev_priv(dev);
1211 struct list_head *iter;
1212 netdev_features_t mask;
1213 struct slave *slave;
1214
1215 mask = features;
1216
1217 features &= ~NETIF_F_ONE_FOR_ALL;
1218 features |= NETIF_F_ALL_FOR_ALL;
1219
1220 bond_for_each_slave(bond, slave, iter) {
1221 features = netdev_increment_features(features,
1222 slave->dev->features,
1223 mask);
1224 }
1225 features = netdev_add_tso_features(features, mask);
1226
1227 return features;
1228}
1229
1230#define BOND_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
1231 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1232 NETIF_F_HIGHDMA | NETIF_F_LRO)
1233
1234#define BOND_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
1235 NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
1236
1237#define BOND_MPLS_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
1238 NETIF_F_ALL_TSO)
1239
1240
1241static void bond_compute_features(struct bonding *bond)
1242{
1243 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1244 IFF_XMIT_DST_RELEASE_PERM;
1245 netdev_features_t vlan_features = BOND_VLAN_FEATURES;
1246 netdev_features_t enc_features = BOND_ENC_FEATURES;
1247#ifdef CONFIG_XFRM_OFFLOAD
1248 netdev_features_t xfrm_features = BOND_XFRM_FEATURES;
1249#endif
1250 netdev_features_t mpls_features = BOND_MPLS_FEATURES;
1251 struct net_device *bond_dev = bond->dev;
1252 struct list_head *iter;
1253 struct slave *slave;
1254 unsigned short max_hard_header_len = ETH_HLEN;
1255 unsigned int gso_max_size = GSO_MAX_SIZE;
1256 u16 gso_max_segs = GSO_MAX_SEGS;
1257
1258 if (!bond_has_slaves(bond))
1259 goto done;
1260 vlan_features &= NETIF_F_ALL_FOR_ALL;
1261 mpls_features &= NETIF_F_ALL_FOR_ALL;
1262
1263 bond_for_each_slave(bond, slave, iter) {
1264 vlan_features = netdev_increment_features(vlan_features,
1265 slave->dev->vlan_features, BOND_VLAN_FEATURES);
1266
1267 enc_features = netdev_increment_features(enc_features,
1268 slave->dev->hw_enc_features,
1269 BOND_ENC_FEATURES);
1270
1271#ifdef CONFIG_XFRM_OFFLOAD
1272 xfrm_features = netdev_increment_features(xfrm_features,
1273 slave->dev->hw_enc_features,
1274 BOND_XFRM_FEATURES);
1275#endif
1276
1277 mpls_features = netdev_increment_features(mpls_features,
1278 slave->dev->mpls_features,
1279 BOND_MPLS_FEATURES);
1280
1281 dst_release_flag &= slave->dev->priv_flags;
1282 if (slave->dev->hard_header_len > max_hard_header_len)
1283 max_hard_header_len = slave->dev->hard_header_len;
1284
1285 gso_max_size = min(gso_max_size, slave->dev->gso_max_size);
1286 gso_max_segs = min(gso_max_segs, slave->dev->gso_max_segs);
1287 }
1288 bond_dev->hard_header_len = max_hard_header_len;
1289
1290done:
1291 bond_dev->vlan_features = vlan_features;
1292 bond_dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1293 NETIF_F_HW_VLAN_CTAG_TX |
1294 NETIF_F_HW_VLAN_STAG_TX |
1295 NETIF_F_GSO_UDP_L4;
1296#ifdef CONFIG_XFRM_OFFLOAD
1297 bond_dev->hw_enc_features |= xfrm_features;
1298#endif
1299 bond_dev->mpls_features = mpls_features;
1300 bond_dev->gso_max_segs = gso_max_segs;
1301 netif_set_gso_max_size(bond_dev, gso_max_size);
1302
1303 bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1304 if ((bond_dev->priv_flags & IFF_XMIT_DST_RELEASE_PERM) &&
1305 dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1306 bond_dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1307
1308 netdev_change_features(bond_dev);
1309}
1310
1311static void bond_setup_by_slave(struct net_device *bond_dev,
1312 struct net_device *slave_dev)
1313{
1314 bond_dev->header_ops = slave_dev->header_ops;
1315
1316 bond_dev->type = slave_dev->type;
1317 bond_dev->hard_header_len = slave_dev->hard_header_len;
1318 bond_dev->needed_headroom = slave_dev->needed_headroom;
1319 bond_dev->addr_len = slave_dev->addr_len;
1320
1321 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1322 slave_dev->addr_len);
1323}
1324
1325
1326
1327
1328static bool bond_should_deliver_exact_match(struct sk_buff *skb,
1329 struct slave *slave,
1330 struct bonding *bond)
1331{
1332 if (bond_is_slave_inactive(slave)) {
1333 if (BOND_MODE(bond) == BOND_MODE_ALB &&
1334 skb->pkt_type != PACKET_BROADCAST &&
1335 skb->pkt_type != PACKET_MULTICAST)
1336 return false;
1337 return true;
1338 }
1339 return false;
1340}
1341
1342static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb)
1343{
1344 struct sk_buff *skb = *pskb;
1345 struct slave *slave;
1346 struct bonding *bond;
1347 int (*recv_probe)(const struct sk_buff *, struct bonding *,
1348 struct slave *);
1349 int ret = RX_HANDLER_ANOTHER;
1350
1351 skb = skb_share_check(skb, GFP_ATOMIC);
1352 if (unlikely(!skb))
1353 return RX_HANDLER_CONSUMED;
1354
1355 *pskb = skb;
1356
1357 slave = bond_slave_get_rcu(skb->dev);
1358 bond = slave->bond;
1359
1360 recv_probe = READ_ONCE(bond->recv_probe);
1361 if (recv_probe) {
1362 ret = recv_probe(skb, bond, slave);
1363 if (ret == RX_HANDLER_CONSUMED) {
1364 consume_skb(skb);
1365 return ret;
1366 }
1367 }
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380 if (bond_should_deliver_exact_match(skb, slave, bond)) {
1381 if (is_link_local_ether_addr(eth_hdr(skb)->h_dest))
1382 return RX_HANDLER_PASS;
1383 return RX_HANDLER_EXACT;
1384 }
1385
1386 skb->dev = bond->dev;
1387
1388 if (BOND_MODE(bond) == BOND_MODE_ALB &&
1389 netif_is_bridge_port(bond->dev) &&
1390 skb->pkt_type == PACKET_HOST) {
1391
1392 if (unlikely(skb_cow_head(skb,
1393 skb->data - skb_mac_header(skb)))) {
1394 kfree_skb(skb);
1395 return RX_HANDLER_CONSUMED;
1396 }
1397 bond_hw_addr_copy(eth_hdr(skb)->h_dest, bond->dev->dev_addr,
1398 bond->dev->addr_len);
1399 }
1400
1401 return ret;
1402}
1403
1404static enum netdev_lag_tx_type bond_lag_tx_type(struct bonding *bond)
1405{
1406 switch (BOND_MODE(bond)) {
1407 case BOND_MODE_ROUNDROBIN:
1408 return NETDEV_LAG_TX_TYPE_ROUNDROBIN;
1409 case BOND_MODE_ACTIVEBACKUP:
1410 return NETDEV_LAG_TX_TYPE_ACTIVEBACKUP;
1411 case BOND_MODE_BROADCAST:
1412 return NETDEV_LAG_TX_TYPE_BROADCAST;
1413 case BOND_MODE_XOR:
1414 case BOND_MODE_8023AD:
1415 return NETDEV_LAG_TX_TYPE_HASH;
1416 default:
1417 return NETDEV_LAG_TX_TYPE_UNKNOWN;
1418 }
1419}
1420
1421static enum netdev_lag_hash bond_lag_hash_type(struct bonding *bond,
1422 enum netdev_lag_tx_type type)
1423{
1424 if (type != NETDEV_LAG_TX_TYPE_HASH)
1425 return NETDEV_LAG_HASH_NONE;
1426
1427 switch (bond->params.xmit_policy) {
1428 case BOND_XMIT_POLICY_LAYER2:
1429 return NETDEV_LAG_HASH_L2;
1430 case BOND_XMIT_POLICY_LAYER34:
1431 return NETDEV_LAG_HASH_L34;
1432 case BOND_XMIT_POLICY_LAYER23:
1433 return NETDEV_LAG_HASH_L23;
1434 case BOND_XMIT_POLICY_ENCAP23:
1435 return NETDEV_LAG_HASH_E23;
1436 case BOND_XMIT_POLICY_ENCAP34:
1437 return NETDEV_LAG_HASH_E34;
1438 default:
1439 return NETDEV_LAG_HASH_UNKNOWN;
1440 }
1441}
1442
1443static int bond_master_upper_dev_link(struct bonding *bond, struct slave *slave,
1444 struct netlink_ext_ack *extack)
1445{
1446 struct netdev_lag_upper_info lag_upper_info;
1447 enum netdev_lag_tx_type type;
1448
1449 type = bond_lag_tx_type(bond);
1450 lag_upper_info.tx_type = type;
1451 lag_upper_info.hash_type = bond_lag_hash_type(bond, type);
1452
1453 return netdev_master_upper_dev_link(slave->dev, bond->dev, slave,
1454 &lag_upper_info, extack);
1455}
1456
1457static void bond_upper_dev_unlink(struct bonding *bond, struct slave *slave)
1458{
1459 netdev_upper_dev_unlink(slave->dev, bond->dev);
1460 slave->dev->flags &= ~IFF_SLAVE;
1461}
1462
1463static void slave_kobj_release(struct kobject *kobj)
1464{
1465 struct slave *slave = to_slave(kobj);
1466 struct bonding *bond = bond_get_bond_by_slave(slave);
1467
1468 cancel_delayed_work_sync(&slave->notify_work);
1469 if (BOND_MODE(bond) == BOND_MODE_8023AD)
1470 kfree(SLAVE_AD_INFO(slave));
1471
1472 kfree(slave);
1473}
1474
1475static struct kobj_type slave_ktype = {
1476 .release = slave_kobj_release,
1477#ifdef CONFIG_SYSFS
1478 .sysfs_ops = &slave_sysfs_ops,
1479#endif
1480};
1481
1482static int bond_kobj_init(struct slave *slave)
1483{
1484 int err;
1485
1486 err = kobject_init_and_add(&slave->kobj, &slave_ktype,
1487 &(slave->dev->dev.kobj), "bonding_slave");
1488 if (err)
1489 kobject_put(&slave->kobj);
1490
1491 return err;
1492}
1493
1494static struct slave *bond_alloc_slave(struct bonding *bond,
1495 struct net_device *slave_dev)
1496{
1497 struct slave *slave = NULL;
1498
1499 slave = kzalloc(sizeof(*slave), GFP_KERNEL);
1500 if (!slave)
1501 return NULL;
1502
1503 slave->bond = bond;
1504 slave->dev = slave_dev;
1505
1506 if (bond_kobj_init(slave))
1507 return NULL;
1508
1509 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
1510 SLAVE_AD_INFO(slave) = kzalloc(sizeof(struct ad_slave_info),
1511 GFP_KERNEL);
1512 if (!SLAVE_AD_INFO(slave)) {
1513 kobject_put(&slave->kobj);
1514 return NULL;
1515 }
1516 }
1517 INIT_DELAYED_WORK(&slave->notify_work, bond_netdev_notify_work);
1518
1519 return slave;
1520}
1521
1522static void bond_fill_ifbond(struct bonding *bond, struct ifbond *info)
1523{
1524 info->bond_mode = BOND_MODE(bond);
1525 info->miimon = bond->params.miimon;
1526 info->num_slaves = bond->slave_cnt;
1527}
1528
1529static void bond_fill_ifslave(struct slave *slave, struct ifslave *info)
1530{
1531 strcpy(info->slave_name, slave->dev->name);
1532 info->link = slave->link;
1533 info->state = bond_slave_state(slave);
1534 info->link_failure_count = slave->link_failure_count;
1535}
1536
1537static void bond_netdev_notify_work(struct work_struct *_work)
1538{
1539 struct slave *slave = container_of(_work, struct slave,
1540 notify_work.work);
1541
1542 if (rtnl_trylock()) {
1543 struct netdev_bonding_info binfo;
1544
1545 bond_fill_ifslave(slave, &binfo.slave);
1546 bond_fill_ifbond(slave->bond, &binfo.master);
1547 netdev_bonding_info_change(slave->dev, &binfo);
1548 rtnl_unlock();
1549 } else {
1550 queue_delayed_work(slave->bond->wq, &slave->notify_work, 1);
1551 }
1552}
1553
1554void bond_queue_slave_event(struct slave *slave)
1555{
1556 queue_delayed_work(slave->bond->wq, &slave->notify_work, 0);
1557}
1558
1559void bond_lower_state_changed(struct slave *slave)
1560{
1561 struct netdev_lag_lower_state_info info;
1562
1563 info.link_up = slave->link == BOND_LINK_UP ||
1564 slave->link == BOND_LINK_FAIL;
1565 info.tx_enabled = bond_is_active_slave(slave);
1566 netdev_lower_state_changed(slave->dev, &info);
1567}
1568
1569
1570int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
1571 struct netlink_ext_ack *extack)
1572{
1573 struct bonding *bond = netdev_priv(bond_dev);
1574 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1575 struct slave *new_slave = NULL, *prev_slave;
1576 struct sockaddr_storage ss;
1577 int link_reporting;
1578 int res = 0, i;
1579
1580 if (!bond->params.use_carrier &&
1581 slave_dev->ethtool_ops->get_link == NULL &&
1582 slave_ops->ndo_do_ioctl == NULL) {
1583 slave_warn(bond_dev, slave_dev, "no link monitoring support\n");
1584 }
1585
1586
1587 if (netdev_is_rx_handler_busy(slave_dev)) {
1588 NL_SET_ERR_MSG(extack, "Device is in use and cannot be enslaved");
1589 slave_err(bond_dev, slave_dev,
1590 "Error: Device is in use and cannot be enslaved\n");
1591 return -EBUSY;
1592 }
1593
1594 if (bond_dev == slave_dev) {
1595 NL_SET_ERR_MSG(extack, "Cannot enslave bond to itself.");
1596 netdev_err(bond_dev, "cannot enslave bond to itself.\n");
1597 return -EPERM;
1598 }
1599
1600
1601
1602 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
1603 slave_dbg(bond_dev, slave_dev, "is NETIF_F_VLAN_CHALLENGED\n");
1604 if (vlan_uses_dev(bond_dev)) {
1605 NL_SET_ERR_MSG(extack, "Can not enslave VLAN challenged device to VLAN enabled bond");
1606 slave_err(bond_dev, slave_dev, "Error: cannot enslave VLAN challenged slave on VLAN enabled bond\n");
1607 return -EPERM;
1608 } else {
1609 slave_warn(bond_dev, slave_dev, "enslaved VLAN challenged slave. Adding VLANs will be blocked as long as it is part of bond.\n");
1610 }
1611 } else {
1612 slave_dbg(bond_dev, slave_dev, "is !NETIF_F_VLAN_CHALLENGED\n");
1613 }
1614
1615 if (slave_dev->features & NETIF_F_HW_ESP)
1616 slave_dbg(bond_dev, slave_dev, "is esp-hw-offload capable\n");
1617
1618
1619
1620
1621
1622
1623 if (slave_dev->flags & IFF_UP) {
1624 NL_SET_ERR_MSG(extack, "Device can not be enslaved while up");
1625 slave_err(bond_dev, slave_dev, "slave is up - this may be due to an out of date ifenslave\n");
1626 return -EPERM;
1627 }
1628
1629
1630
1631
1632
1633
1634
1635
1636 if (!bond_has_slaves(bond)) {
1637 if (bond_dev->type != slave_dev->type) {
1638 slave_dbg(bond_dev, slave_dev, "change device type from %d to %d\n",
1639 bond_dev->type, slave_dev->type);
1640
1641 res = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE,
1642 bond_dev);
1643 res = notifier_to_errno(res);
1644 if (res) {
1645 slave_err(bond_dev, slave_dev, "refused to change device type\n");
1646 return -EBUSY;
1647 }
1648
1649
1650 dev_uc_flush(bond_dev);
1651 dev_mc_flush(bond_dev);
1652
1653 if (slave_dev->type != ARPHRD_ETHER)
1654 bond_setup_by_slave(bond_dev, slave_dev);
1655 else {
1656 ether_setup(bond_dev);
1657 bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1658 }
1659
1660 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE,
1661 bond_dev);
1662 }
1663 } else if (bond_dev->type != slave_dev->type) {
1664 NL_SET_ERR_MSG(extack, "Device type is different from other slaves");
1665 slave_err(bond_dev, slave_dev, "ether type (%d) is different from other slaves (%d), can not enslave it\n",
1666 slave_dev->type, bond_dev->type);
1667 return -EINVAL;
1668 }
1669
1670 if (slave_dev->type == ARPHRD_INFINIBAND &&
1671 BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
1672 NL_SET_ERR_MSG(extack, "Only active-backup mode is supported for infiniband slaves");
1673 slave_warn(bond_dev, slave_dev, "Type (%d) supports only active-backup mode\n",
1674 slave_dev->type);
1675 res = -EOPNOTSUPP;
1676 goto err_undo_flags;
1677 }
1678
1679 if (!slave_ops->ndo_set_mac_address ||
1680 slave_dev->type == ARPHRD_INFINIBAND) {
1681 slave_warn(bond_dev, slave_dev, "The slave device specified does not support setting the MAC address\n");
1682 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
1683 bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
1684 if (!bond_has_slaves(bond)) {
1685 bond->params.fail_over_mac = BOND_FOM_ACTIVE;
1686 slave_warn(bond_dev, slave_dev, "Setting fail_over_mac to active for active-backup mode\n");
1687 } else {
1688 NL_SET_ERR_MSG(extack, "Slave device does not support setting the MAC address, but fail_over_mac is not set to active");
1689 slave_err(bond_dev, slave_dev, "The slave device specified does not support setting the MAC address, but fail_over_mac is not set to active\n");
1690 res = -EOPNOTSUPP;
1691 goto err_undo_flags;
1692 }
1693 }
1694 }
1695
1696 call_netdevice_notifiers(NETDEV_JOIN, slave_dev);
1697
1698
1699
1700
1701 if (!bond_has_slaves(bond) &&
1702 bond->dev->addr_assign_type == NET_ADDR_RANDOM) {
1703 res = bond_set_dev_addr(bond->dev, slave_dev);
1704 if (res)
1705 goto err_undo_flags;
1706 }
1707
1708 new_slave = bond_alloc_slave(bond, slave_dev);
1709 if (!new_slave) {
1710 res = -ENOMEM;
1711 goto err_undo_flags;
1712 }
1713
1714
1715
1716
1717 new_slave->queue_id = 0;
1718
1719
1720 new_slave->original_mtu = slave_dev->mtu;
1721 res = dev_set_mtu(slave_dev, bond->dev->mtu);
1722 if (res) {
1723 slave_err(bond_dev, slave_dev, "Error %d calling dev_set_mtu\n", res);
1724 goto err_free;
1725 }
1726
1727
1728
1729
1730
1731 bond_hw_addr_copy(new_slave->perm_hwaddr, slave_dev->dev_addr,
1732 slave_dev->addr_len);
1733
1734 if (!bond->params.fail_over_mac ||
1735 BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
1736
1737
1738
1739 memcpy(ss.__data, bond_dev->dev_addr, bond_dev->addr_len);
1740 ss.ss_family = slave_dev->type;
1741 res = dev_set_mac_address(slave_dev, (struct sockaddr *)&ss,
1742 extack);
1743 if (res) {
1744 slave_err(bond_dev, slave_dev, "Error %d calling set_mac_address\n", res);
1745 goto err_restore_mtu;
1746 }
1747 }
1748
1749
1750 slave_dev->flags |= IFF_SLAVE;
1751
1752
1753 res = dev_open(slave_dev, extack);
1754 if (res) {
1755 slave_err(bond_dev, slave_dev, "Opening slave failed\n");
1756 goto err_restore_mac;
1757 }
1758
1759 slave_dev->priv_flags |= IFF_BONDING;
1760
1761 dev_get_stats(new_slave->dev, &new_slave->slave_stats);
1762
1763 if (bond_is_lb(bond)) {
1764
1765
1766
1767 res = bond_alb_init_slave(bond, new_slave);
1768 if (res)
1769 goto err_close;
1770 }
1771
1772 res = vlan_vids_add_by_dev(slave_dev, bond_dev);
1773 if (res) {
1774 slave_err(bond_dev, slave_dev, "Couldn't add bond vlan ids\n");
1775 goto err_close;
1776 }
1777
1778 prev_slave = bond_last_slave(bond);
1779
1780 new_slave->delay = 0;
1781 new_slave->link_failure_count = 0;
1782
1783 if (bond_update_speed_duplex(new_slave) &&
1784 bond_needs_speed_duplex(bond))
1785 new_slave->link = BOND_LINK_DOWN;
1786
1787 new_slave->last_rx = jiffies -
1788 (msecs_to_jiffies(bond->params.arp_interval) + 1);
1789 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1790 new_slave->target_last_arp_rx[i] = new_slave->last_rx;
1791
1792 if (bond->params.miimon && !bond->params.use_carrier) {
1793 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1794
1795 if ((link_reporting == -1) && !bond->params.arp_interval) {
1796
1797
1798
1799
1800
1801
1802
1803
1804 slave_warn(bond_dev, slave_dev, "MII and ETHTOOL support not available for slave, and arp_interval/arp_ip_target module parameters not specified, thus bonding will not detect link failures! see bonding.txt for details\n");
1805 } else if (link_reporting == -1) {
1806
1807 slave_warn(bond_dev, slave_dev, "can't get link status from slave; 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");
1808 }
1809 }
1810
1811
1812 new_slave->link = BOND_LINK_NOCHANGE;
1813 if (bond->params.miimon) {
1814 if (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS) {
1815 if (bond->params.updelay) {
1816 bond_set_slave_link_state(new_slave,
1817 BOND_LINK_BACK,
1818 BOND_SLAVE_NOTIFY_NOW);
1819 new_slave->delay = bond->params.updelay;
1820 } else {
1821 bond_set_slave_link_state(new_slave,
1822 BOND_LINK_UP,
1823 BOND_SLAVE_NOTIFY_NOW);
1824 }
1825 } else {
1826 bond_set_slave_link_state(new_slave, BOND_LINK_DOWN,
1827 BOND_SLAVE_NOTIFY_NOW);
1828 }
1829 } else if (bond->params.arp_interval) {
1830 bond_set_slave_link_state(new_slave,
1831 (netif_carrier_ok(slave_dev) ?
1832 BOND_LINK_UP : BOND_LINK_DOWN),
1833 BOND_SLAVE_NOTIFY_NOW);
1834 } else {
1835 bond_set_slave_link_state(new_slave, BOND_LINK_UP,
1836 BOND_SLAVE_NOTIFY_NOW);
1837 }
1838
1839 if (new_slave->link != BOND_LINK_DOWN)
1840 new_slave->last_link_up = jiffies;
1841 slave_dbg(bond_dev, slave_dev, "Initial state of slave is BOND_LINK_%s\n",
1842 new_slave->link == BOND_LINK_DOWN ? "DOWN" :
1843 (new_slave->link == BOND_LINK_UP ? "UP" : "BACK"));
1844
1845 if (bond_uses_primary(bond) && bond->params.primary[0]) {
1846
1847 if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
1848 rcu_assign_pointer(bond->primary_slave, new_slave);
1849 bond->force_primary = true;
1850 }
1851 }
1852
1853 switch (BOND_MODE(bond)) {
1854 case BOND_MODE_ACTIVEBACKUP:
1855 bond_set_slave_inactive_flags(new_slave,
1856 BOND_SLAVE_NOTIFY_NOW);
1857 break;
1858 case BOND_MODE_8023AD:
1859
1860
1861
1862
1863 bond_set_slave_inactive_flags(new_slave, BOND_SLAVE_NOTIFY_NOW);
1864
1865 if (!prev_slave) {
1866 SLAVE_AD_INFO(new_slave)->id = 1;
1867
1868
1869
1870 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL);
1871 } else {
1872 SLAVE_AD_INFO(new_slave)->id =
1873 SLAVE_AD_INFO(prev_slave)->id + 1;
1874 }
1875
1876 bond_3ad_bind_slave(new_slave);
1877 break;
1878 case BOND_MODE_TLB:
1879 case BOND_MODE_ALB:
1880 bond_set_active_slave(new_slave);
1881 bond_set_slave_inactive_flags(new_slave, BOND_SLAVE_NOTIFY_NOW);
1882 break;
1883 default:
1884 slave_dbg(bond_dev, slave_dev, "This slave is always active in trunk mode\n");
1885
1886
1887 bond_set_active_slave(new_slave);
1888
1889
1890
1891
1892
1893 if (!rcu_access_pointer(bond->curr_active_slave) &&
1894 new_slave->link == BOND_LINK_UP)
1895 rcu_assign_pointer(bond->curr_active_slave, new_slave);
1896
1897 break;
1898 }
1899
1900#ifdef CONFIG_NET_POLL_CONTROLLER
1901 if (bond->dev->npinfo) {
1902 if (slave_enable_netpoll(new_slave)) {
1903 slave_info(bond_dev, slave_dev, "master_dev is using netpoll, but new slave device does not support netpoll\n");
1904 res = -EBUSY;
1905 goto err_detach;
1906 }
1907 }
1908#endif
1909
1910 if (!(bond_dev->features & NETIF_F_LRO))
1911 dev_disable_lro(slave_dev);
1912
1913 res = netdev_rx_handler_register(slave_dev, bond_handle_frame,
1914 new_slave);
1915 if (res) {
1916 slave_dbg(bond_dev, slave_dev, "Error %d calling netdev_rx_handler_register\n", res);
1917 goto err_detach;
1918 }
1919
1920 res = bond_master_upper_dev_link(bond, new_slave, extack);
1921 if (res) {
1922 slave_dbg(bond_dev, slave_dev, "Error %d calling bond_master_upper_dev_link\n", res);
1923 goto err_unregister;
1924 }
1925
1926 res = bond_sysfs_slave_add(new_slave);
1927 if (res) {
1928 slave_dbg(bond_dev, slave_dev, "Error %d calling bond_sysfs_slave_add\n", res);
1929 goto err_upper_unlink;
1930 }
1931
1932
1933
1934
1935 if (!bond_uses_primary(bond)) {
1936
1937 if (bond_dev->flags & IFF_PROMISC) {
1938 res = dev_set_promiscuity(slave_dev, 1);
1939 if (res)
1940 goto err_sysfs_del;
1941 }
1942
1943
1944 if (bond_dev->flags & IFF_ALLMULTI) {
1945 res = dev_set_allmulti(slave_dev, 1);
1946 if (res) {
1947 if (bond_dev->flags & IFF_PROMISC)
1948 dev_set_promiscuity(slave_dev, -1);
1949 goto err_sysfs_del;
1950 }
1951 }
1952
1953 netif_addr_lock_bh(bond_dev);
1954 dev_mc_sync_multiple(slave_dev, bond_dev);
1955 dev_uc_sync_multiple(slave_dev, bond_dev);
1956 netif_addr_unlock_bh(bond_dev);
1957
1958 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
1959
1960 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1961
1962 dev_mc_add(slave_dev, lacpdu_multicast);
1963 }
1964 }
1965
1966 bond->slave_cnt++;
1967 bond_compute_features(bond);
1968 bond_set_carrier(bond);
1969
1970 if (bond_uses_primary(bond)) {
1971 block_netpoll_tx();
1972 bond_select_active_slave(bond);
1973 unblock_netpoll_tx();
1974 }
1975
1976 if (bond_mode_can_use_xmit_hash(bond))
1977 bond_update_slave_arr(bond, NULL);
1978
1979
1980 slave_info(bond_dev, slave_dev, "Enslaving as %s interface with %s link\n",
1981 bond_is_active_slave(new_slave) ? "an active" : "a backup",
1982 new_slave->link != BOND_LINK_DOWN ? "an up" : "a down");
1983
1984
1985 bond_queue_slave_event(new_slave);
1986 return 0;
1987
1988
1989err_sysfs_del:
1990 bond_sysfs_slave_del(new_slave);
1991
1992err_upper_unlink:
1993 bond_upper_dev_unlink(bond, new_slave);
1994
1995err_unregister:
1996 netdev_rx_handler_unregister(slave_dev);
1997
1998err_detach:
1999 vlan_vids_del_by_dev(slave_dev, bond_dev);
2000 if (rcu_access_pointer(bond->primary_slave) == new_slave)
2001 RCU_INIT_POINTER(bond->primary_slave, NULL);
2002 if (rcu_access_pointer(bond->curr_active_slave) == new_slave) {
2003 block_netpoll_tx();
2004 bond_change_active_slave(bond, NULL);
2005 bond_select_active_slave(bond);
2006 unblock_netpoll_tx();
2007 }
2008
2009 synchronize_rcu();
2010 slave_disable_netpoll(new_slave);
2011
2012err_close:
2013 if (!netif_is_bond_master(slave_dev))
2014 slave_dev->priv_flags &= ~IFF_BONDING;
2015 dev_close(slave_dev);
2016
2017err_restore_mac:
2018 slave_dev->flags &= ~IFF_SLAVE;
2019 if (!bond->params.fail_over_mac ||
2020 BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
2021
2022
2023
2024
2025 bond_hw_addr_copy(ss.__data, new_slave->perm_hwaddr,
2026 new_slave->dev->addr_len);
2027 ss.ss_family = slave_dev->type;
2028 dev_set_mac_address(slave_dev, (struct sockaddr *)&ss, NULL);
2029 }
2030
2031err_restore_mtu:
2032 dev_set_mtu(slave_dev, new_slave->original_mtu);
2033
2034err_free:
2035 kobject_put(&new_slave->kobj);
2036
2037err_undo_flags:
2038
2039 if (!bond_has_slaves(bond)) {
2040 if (ether_addr_equal_64bits(bond_dev->dev_addr,
2041 slave_dev->dev_addr))
2042 eth_hw_addr_random(bond_dev);
2043 if (bond_dev->type != ARPHRD_ETHER) {
2044 dev_close(bond_dev);
2045 ether_setup(bond_dev);
2046 bond_dev->flags |= IFF_MASTER;
2047 bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING;
2048 }
2049 }
2050
2051 return res;
2052}
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065static int __bond_release_one(struct net_device *bond_dev,
2066 struct net_device *slave_dev,
2067 bool all, bool unregister)
2068{
2069 struct bonding *bond = netdev_priv(bond_dev);
2070 struct slave *slave, *oldcurrent;
2071 struct sockaddr_storage ss;
2072 int old_flags = bond_dev->flags;
2073 netdev_features_t old_features = bond_dev->features;
2074
2075
2076 if (!(slave_dev->flags & IFF_SLAVE) ||
2077 !netdev_has_upper_dev(slave_dev, bond_dev)) {
2078 slave_dbg(bond_dev, slave_dev, "cannot release slave\n");
2079 return -EINVAL;
2080 }
2081
2082 block_netpoll_tx();
2083
2084 slave = bond_get_slave_by_dev(bond, slave_dev);
2085 if (!slave) {
2086
2087 slave_info(bond_dev, slave_dev, "interface not enslaved\n");
2088 unblock_netpoll_tx();
2089 return -EINVAL;
2090 }
2091
2092 bond_set_slave_inactive_flags(slave, BOND_SLAVE_NOTIFY_NOW);
2093
2094 bond_sysfs_slave_del(slave);
2095
2096
2097 bond_get_stats(bond->dev, &bond->bond_stats);
2098
2099 bond_upper_dev_unlink(bond, slave);
2100
2101
2102
2103 netdev_rx_handler_unregister(slave_dev);
2104
2105 if (BOND_MODE(bond) == BOND_MODE_8023AD)
2106 bond_3ad_unbind_slave(slave);
2107
2108 if (bond_mode_can_use_xmit_hash(bond))
2109 bond_update_slave_arr(bond, slave);
2110
2111 slave_info(bond_dev, slave_dev, "Releasing %s interface\n",
2112 bond_is_active_slave(slave) ? "active" : "backup");
2113
2114 oldcurrent = rcu_access_pointer(bond->curr_active_slave);
2115
2116 RCU_INIT_POINTER(bond->current_arp_slave, NULL);
2117
2118 if (!all && (!bond->params.fail_over_mac ||
2119 BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP)) {
2120 if (ether_addr_equal_64bits(bond_dev->dev_addr, slave->perm_hwaddr) &&
2121 bond_has_slaves(bond))
2122 slave_warn(bond_dev, slave_dev, "the permanent HWaddr of slave - %pM - is still in use by bond - set the HWaddr of slave to a different address to avoid conflicts\n",
2123 slave->perm_hwaddr);
2124 }
2125
2126 if (rtnl_dereference(bond->primary_slave) == slave)
2127 RCU_INIT_POINTER(bond->primary_slave, NULL);
2128
2129 if (oldcurrent == slave)
2130 bond_change_active_slave(bond, NULL);
2131
2132 if (bond_is_lb(bond)) {
2133
2134
2135
2136
2137
2138 bond_alb_deinit_slave(bond, slave);
2139 }
2140
2141 if (all) {
2142 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
2143 } else if (oldcurrent == slave) {
2144
2145
2146
2147
2148 bond_select_active_slave(bond);
2149 }
2150
2151 if (!bond_has_slaves(bond)) {
2152 bond_set_carrier(bond);
2153 eth_hw_addr_random(bond_dev);
2154 }
2155
2156 unblock_netpoll_tx();
2157 synchronize_rcu();
2158 bond->slave_cnt--;
2159
2160 if (!bond_has_slaves(bond)) {
2161 call_netdevice_notifiers(NETDEV_CHANGEADDR, bond->dev);
2162 call_netdevice_notifiers(NETDEV_RELEASE, bond->dev);
2163 }
2164
2165 bond_compute_features(bond);
2166 if (!(bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
2167 (old_features & NETIF_F_VLAN_CHALLENGED))
2168 slave_info(bond_dev, slave_dev, "last VLAN challenged slave left bond - VLAN blocking is removed\n");
2169
2170 vlan_vids_del_by_dev(slave_dev, bond_dev);
2171
2172
2173
2174
2175 if (!bond_uses_primary(bond)) {
2176
2177
2178
2179
2180
2181
2182
2183 if (old_flags & IFF_PROMISC)
2184 dev_set_promiscuity(slave_dev, -1);
2185
2186
2187 if (old_flags & IFF_ALLMULTI)
2188 dev_set_allmulti(slave_dev, -1);
2189
2190 bond_hw_addr_flush(bond_dev, slave_dev);
2191 }
2192
2193 slave_disable_netpoll(slave);
2194
2195
2196 dev_close(slave_dev);
2197
2198 if (bond->params.fail_over_mac != BOND_FOM_ACTIVE ||
2199 BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
2200
2201 bond_hw_addr_copy(ss.__data, slave->perm_hwaddr,
2202 slave->dev->addr_len);
2203 ss.ss_family = slave_dev->type;
2204 dev_set_mac_address(slave_dev, (struct sockaddr *)&ss, NULL);
2205 }
2206
2207 if (unregister)
2208 __dev_set_mtu(slave_dev, slave->original_mtu);
2209 else
2210 dev_set_mtu(slave_dev, slave->original_mtu);
2211
2212 if (!netif_is_bond_master(slave_dev))
2213 slave_dev->priv_flags &= ~IFF_BONDING;
2214
2215 kobject_put(&slave->kobj);
2216
2217 return 0;
2218}
2219
2220
2221int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
2222{
2223 return __bond_release_one(bond_dev, slave_dev, false, false);
2224}
2225
2226
2227
2228
2229static int bond_release_and_destroy(struct net_device *bond_dev,
2230 struct net_device *slave_dev)
2231{
2232 struct bonding *bond = netdev_priv(bond_dev);
2233 int ret;
2234
2235 ret = __bond_release_one(bond_dev, slave_dev, false, true);
2236 if (ret == 0 && !bond_has_slaves(bond) &&
2237 bond_dev->reg_state != NETREG_UNREGISTERING) {
2238 bond_dev->priv_flags |= IFF_DISABLE_NETPOLL;
2239 netdev_info(bond_dev, "Destroying bond\n");
2240 bond_remove_proc_entry(bond);
2241 unregister_netdevice(bond_dev);
2242 }
2243 return ret;
2244}
2245
2246static void bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2247{
2248 struct bonding *bond = netdev_priv(bond_dev);
2249 bond_fill_ifbond(bond, info);
2250}
2251
2252static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2253{
2254 struct bonding *bond = netdev_priv(bond_dev);
2255 struct list_head *iter;
2256 int i = 0, res = -ENODEV;
2257 struct slave *slave;
2258
2259 bond_for_each_slave(bond, slave, iter) {
2260 if (i++ == (int)info->slave_id) {
2261 res = 0;
2262 bond_fill_ifslave(slave, info);
2263 break;
2264 }
2265 }
2266
2267 return res;
2268}
2269
2270
2271
2272
2273static int bond_miimon_inspect(struct bonding *bond)
2274{
2275 int link_state, commit = 0;
2276 struct list_head *iter;
2277 struct slave *slave;
2278 bool ignore_updelay;
2279
2280 ignore_updelay = !rcu_dereference(bond->curr_active_slave);
2281
2282 bond_for_each_slave_rcu(bond, slave, iter) {
2283 bond_propose_link_state(slave, BOND_LINK_NOCHANGE);
2284
2285 link_state = bond_check_dev_link(bond, slave->dev, 0);
2286
2287 switch (slave->link) {
2288 case BOND_LINK_UP:
2289 if (link_state)
2290 continue;
2291
2292 bond_propose_link_state(slave, BOND_LINK_FAIL);
2293 commit++;
2294 slave->delay = bond->params.downdelay;
2295 if (slave->delay) {
2296 slave_info(bond->dev, slave->dev, "link status down for %sinterface, disabling it in %d ms\n",
2297 (BOND_MODE(bond) ==
2298 BOND_MODE_ACTIVEBACKUP) ?
2299 (bond_is_active_slave(slave) ?
2300 "active " : "backup ") : "",
2301 bond->params.downdelay * bond->params.miimon);
2302 }
2303 fallthrough;
2304 case BOND_LINK_FAIL:
2305 if (link_state) {
2306
2307 bond_propose_link_state(slave, BOND_LINK_UP);
2308 slave->last_link_up = jiffies;
2309 slave_info(bond->dev, slave->dev, "link status up again after %d ms\n",
2310 (bond->params.downdelay - slave->delay) *
2311 bond->params.miimon);
2312 commit++;
2313 continue;
2314 }
2315
2316 if (slave->delay <= 0) {
2317 bond_propose_link_state(slave, BOND_LINK_DOWN);
2318 commit++;
2319 continue;
2320 }
2321
2322 slave->delay--;
2323 break;
2324
2325 case BOND_LINK_DOWN:
2326 if (!link_state)
2327 continue;
2328
2329 bond_propose_link_state(slave, BOND_LINK_BACK);
2330 commit++;
2331 slave->delay = bond->params.updelay;
2332
2333 if (slave->delay) {
2334 slave_info(bond->dev, slave->dev, "link status up, enabling it in %d ms\n",
2335 ignore_updelay ? 0 :
2336 bond->params.updelay *
2337 bond->params.miimon);
2338 }
2339 fallthrough;
2340 case BOND_LINK_BACK:
2341 if (!link_state) {
2342 bond_propose_link_state(slave, BOND_LINK_DOWN);
2343 slave_info(bond->dev, slave->dev, "link status down again after %d ms\n",
2344 (bond->params.updelay - slave->delay) *
2345 bond->params.miimon);
2346 commit++;
2347 continue;
2348 }
2349
2350 if (ignore_updelay)
2351 slave->delay = 0;
2352
2353 if (slave->delay <= 0) {
2354 bond_propose_link_state(slave, BOND_LINK_UP);
2355 commit++;
2356 ignore_updelay = false;
2357 continue;
2358 }
2359
2360 slave->delay--;
2361 break;
2362 }
2363 }
2364
2365 return commit;
2366}
2367
2368static void bond_miimon_link_change(struct bonding *bond,
2369 struct slave *slave,
2370 char link)
2371{
2372 switch (BOND_MODE(bond)) {
2373 case BOND_MODE_8023AD:
2374 bond_3ad_handle_link_change(slave, link);
2375 break;
2376 case BOND_MODE_TLB:
2377 case BOND_MODE_ALB:
2378 bond_alb_handle_link_change(bond, slave, link);
2379 break;
2380 case BOND_MODE_XOR:
2381 bond_update_slave_arr(bond, NULL);
2382 break;
2383 }
2384}
2385
2386static void bond_miimon_commit(struct bonding *bond)
2387{
2388 struct list_head *iter;
2389 struct slave *slave, *primary;
2390
2391 bond_for_each_slave(bond, slave, iter) {
2392 switch (slave->link_new_state) {
2393 case BOND_LINK_NOCHANGE:
2394
2395
2396
2397
2398
2399
2400 if (BOND_MODE(bond) == BOND_MODE_8023AD &&
2401 slave->link == BOND_LINK_UP)
2402 bond_3ad_adapter_speed_duplex_changed(slave);
2403 continue;
2404
2405 case BOND_LINK_UP:
2406 if (bond_update_speed_duplex(slave) &&
2407 bond_needs_speed_duplex(bond)) {
2408 slave->link = BOND_LINK_DOWN;
2409 if (net_ratelimit())
2410 slave_warn(bond->dev, slave->dev,
2411 "failed to get link speed/duplex\n");
2412 continue;
2413 }
2414 bond_set_slave_link_state(slave, BOND_LINK_UP,
2415 BOND_SLAVE_NOTIFY_NOW);
2416 slave->last_link_up = jiffies;
2417
2418 primary = rtnl_dereference(bond->primary_slave);
2419 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
2420
2421 bond_set_backup_slave(slave);
2422 } else if (BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
2423
2424 bond_set_active_slave(slave);
2425 }
2426
2427 slave_info(bond->dev, slave->dev, "link status definitely up, %u Mbps %s duplex\n",
2428 slave->speed == SPEED_UNKNOWN ? 0 : slave->speed,
2429 slave->duplex ? "full" : "half");
2430
2431 bond_miimon_link_change(bond, slave, BOND_LINK_UP);
2432
2433 if (!bond->curr_active_slave || slave == primary)
2434 goto do_failover;
2435
2436 continue;
2437
2438 case BOND_LINK_DOWN:
2439 if (slave->link_failure_count < UINT_MAX)
2440 slave->link_failure_count++;
2441
2442 bond_set_slave_link_state(slave, BOND_LINK_DOWN,
2443 BOND_SLAVE_NOTIFY_NOW);
2444
2445 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
2446 BOND_MODE(bond) == BOND_MODE_8023AD)
2447 bond_set_slave_inactive_flags(slave,
2448 BOND_SLAVE_NOTIFY_NOW);
2449
2450 slave_info(bond->dev, slave->dev, "link status definitely down, disabling slave\n");
2451
2452 bond_miimon_link_change(bond, slave, BOND_LINK_DOWN);
2453
2454 if (slave == rcu_access_pointer(bond->curr_active_slave))
2455 goto do_failover;
2456
2457 continue;
2458
2459 default:
2460 slave_err(bond->dev, slave->dev, "invalid new link %d on slave\n",
2461 slave->link_new_state);
2462 bond_propose_link_state(slave, BOND_LINK_NOCHANGE);
2463
2464 continue;
2465 }
2466
2467do_failover:
2468 block_netpoll_tx();
2469 bond_select_active_slave(bond);
2470 unblock_netpoll_tx();
2471 }
2472
2473 bond_set_carrier(bond);
2474}
2475
2476
2477
2478
2479
2480
2481
2482
2483static void bond_mii_monitor(struct work_struct *work)
2484{
2485 struct bonding *bond = container_of(work, struct bonding,
2486 mii_work.work);
2487 bool should_notify_peers = false;
2488 bool commit;
2489 unsigned long delay;
2490 struct slave *slave;
2491 struct list_head *iter;
2492
2493 delay = msecs_to_jiffies(bond->params.miimon);
2494
2495 if (!bond_has_slaves(bond))
2496 goto re_arm;
2497
2498 rcu_read_lock();
2499 should_notify_peers = bond_should_notify_peers(bond);
2500 commit = !!bond_miimon_inspect(bond);
2501 if (bond->send_peer_notif) {
2502 rcu_read_unlock();
2503 if (rtnl_trylock()) {
2504 bond->send_peer_notif--;
2505 rtnl_unlock();
2506 }
2507 } else {
2508 rcu_read_unlock();
2509 }
2510
2511 if (commit) {
2512
2513 if (!rtnl_trylock()) {
2514 delay = 1;
2515 should_notify_peers = false;
2516 goto re_arm;
2517 }
2518
2519 bond_for_each_slave(bond, slave, iter) {
2520 bond_commit_link_state(slave, BOND_SLAVE_NOTIFY_LATER);
2521 }
2522 bond_miimon_commit(bond);
2523
2524 rtnl_unlock();
2525 }
2526
2527re_arm:
2528 if (bond->params.miimon)
2529 queue_delayed_work(bond->wq, &bond->mii_work, delay);
2530
2531 if (should_notify_peers) {
2532 if (!rtnl_trylock())
2533 return;
2534 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, bond->dev);
2535 rtnl_unlock();
2536 }
2537}
2538
2539static int bond_upper_dev_walk(struct net_device *upper,
2540 struct netdev_nested_priv *priv)
2541{
2542 __be32 ip = *(__be32 *)priv->data;
2543
2544 return ip == bond_confirm_addr(upper, 0, ip);
2545}
2546
2547static bool bond_has_this_ip(struct bonding *bond, __be32 ip)
2548{
2549 struct netdev_nested_priv priv = {
2550 .data = (void *)&ip,
2551 };
2552 bool ret = false;
2553
2554 if (ip == bond_confirm_addr(bond->dev, 0, ip))
2555 return true;
2556
2557 rcu_read_lock();
2558 if (netdev_walk_all_upper_dev_rcu(bond->dev, bond_upper_dev_walk, &priv))
2559 ret = true;
2560 rcu_read_unlock();
2561
2562 return ret;
2563}
2564
2565
2566
2567
2568
2569static void bond_arp_send(struct slave *slave, int arp_op, __be32 dest_ip,
2570 __be32 src_ip, struct bond_vlan_tag *tags)
2571{
2572 struct sk_buff *skb;
2573 struct bond_vlan_tag *outer_tag = tags;
2574 struct net_device *slave_dev = slave->dev;
2575 struct net_device *bond_dev = slave->bond->dev;
2576
2577 slave_dbg(bond_dev, slave_dev, "arp %d on slave: dst %pI4 src %pI4\n",
2578 arp_op, &dest_ip, &src_ip);
2579
2580 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2581 NULL, slave_dev->dev_addr, NULL);
2582
2583 if (!skb) {
2584 net_err_ratelimited("ARP packet allocation failed\n");
2585 return;
2586 }
2587
2588 if (!tags || tags->vlan_proto == VLAN_N_VID)
2589 goto xmit;
2590
2591 tags++;
2592
2593
2594 while (tags->vlan_proto != VLAN_N_VID) {
2595 if (!tags->vlan_id) {
2596 tags++;
2597 continue;
2598 }
2599
2600 slave_dbg(bond_dev, slave_dev, "inner tag: proto %X vid %X\n",
2601 ntohs(outer_tag->vlan_proto), tags->vlan_id);
2602 skb = vlan_insert_tag_set_proto(skb, tags->vlan_proto,
2603 tags->vlan_id);
2604 if (!skb) {
2605 net_err_ratelimited("failed to insert inner VLAN tag\n");
2606 return;
2607 }
2608
2609 tags++;
2610 }
2611
2612 if (outer_tag->vlan_id) {
2613 slave_dbg(bond_dev, slave_dev, "outer tag: proto %X vid %X\n",
2614 ntohs(outer_tag->vlan_proto), outer_tag->vlan_id);
2615 __vlan_hwaccel_put_tag(skb, outer_tag->vlan_proto,
2616 outer_tag->vlan_id);
2617 }
2618
2619xmit:
2620 arp_xmit(skb);
2621}
2622
2623
2624
2625
2626
2627
2628
2629struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
2630 struct net_device *end_dev,
2631 int level)
2632{
2633 struct bond_vlan_tag *tags;
2634 struct net_device *upper;
2635 struct list_head *iter;
2636
2637 if (start_dev == end_dev) {
2638 tags = kcalloc(level + 1, sizeof(*tags), GFP_ATOMIC);
2639 if (!tags)
2640 return ERR_PTR(-ENOMEM);
2641 tags[level].vlan_proto = VLAN_N_VID;
2642 return tags;
2643 }
2644
2645 netdev_for_each_upper_dev_rcu(start_dev, upper, iter) {
2646 tags = bond_verify_device_path(upper, end_dev, level + 1);
2647 if (IS_ERR_OR_NULL(tags)) {
2648 if (IS_ERR(tags))
2649 return tags;
2650 continue;
2651 }
2652 if (is_vlan_dev(upper)) {
2653 tags[level].vlan_proto = vlan_dev_vlan_proto(upper);
2654 tags[level].vlan_id = vlan_dev_vlan_id(upper);
2655 }
2656
2657 return tags;
2658 }
2659
2660 return NULL;
2661}
2662
2663static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2664{
2665 struct rtable *rt;
2666 struct bond_vlan_tag *tags;
2667 __be32 *targets = bond->params.arp_targets, addr;
2668 int i;
2669
2670 for (i = 0; i < BOND_MAX_ARP_TARGETS && targets[i]; i++) {
2671 slave_dbg(bond->dev, slave->dev, "%s: target %pI4\n",
2672 __func__, &targets[i]);
2673 tags = NULL;
2674
2675
2676 rt = ip_route_output(dev_net(bond->dev), targets[i], 0,
2677 RTO_ONLINK, 0);
2678 if (IS_ERR(rt)) {
2679
2680
2681
2682 if (bond->params.arp_validate)
2683 net_warn_ratelimited("%s: no route to arp_ip_target %pI4 and arp_validate is set\n",
2684 bond->dev->name,
2685 &targets[i]);
2686 bond_arp_send(slave, ARPOP_REQUEST, targets[i],
2687 0, tags);
2688 continue;
2689 }
2690
2691
2692 if (rt->dst.dev == bond->dev)
2693 goto found;
2694
2695 rcu_read_lock();
2696 tags = bond_verify_device_path(bond->dev, rt->dst.dev, 0);
2697 rcu_read_unlock();
2698
2699 if (!IS_ERR_OR_NULL(tags))
2700 goto found;
2701
2702
2703 slave_dbg(bond->dev, slave->dev, "no path to arp_ip_target %pI4 via rt.dev %s\n",
2704 &targets[i], rt->dst.dev ? rt->dst.dev->name : "NULL");
2705
2706 ip_rt_put(rt);
2707 continue;
2708
2709found:
2710 addr = bond_confirm_addr(rt->dst.dev, targets[i], 0);
2711 ip_rt_put(rt);
2712 bond_arp_send(slave, ARPOP_REQUEST, targets[i], addr, tags);
2713 kfree(tags);
2714 }
2715}
2716
2717static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
2718{
2719 int i;
2720
2721 if (!sip || !bond_has_this_ip(bond, tip)) {
2722 slave_dbg(bond->dev, slave->dev, "%s: sip %pI4 tip %pI4 not found\n",
2723 __func__, &sip, &tip);
2724 return;
2725 }
2726
2727 i = bond_get_targets_ip(bond->params.arp_targets, sip);
2728 if (i == -1) {
2729 slave_dbg(bond->dev, slave->dev, "%s: sip %pI4 not found in targets\n",
2730 __func__, &sip);
2731 return;
2732 }
2733 slave->last_rx = jiffies;
2734 slave->target_last_arp_rx[i] = jiffies;
2735}
2736
2737int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond,
2738 struct slave *slave)
2739{
2740 struct arphdr *arp = (struct arphdr *)skb->data;
2741 struct slave *curr_active_slave, *curr_arp_slave;
2742 unsigned char *arp_ptr;
2743 __be32 sip, tip;
2744 int is_arp = skb->protocol == __cpu_to_be16(ETH_P_ARP);
2745 unsigned int alen;
2746
2747 if (!slave_do_arp_validate(bond, slave)) {
2748 if ((slave_do_arp_validate_only(bond) && is_arp) ||
2749 !slave_do_arp_validate_only(bond))
2750 slave->last_rx = jiffies;
2751 return RX_HANDLER_ANOTHER;
2752 } else if (!is_arp) {
2753 return RX_HANDLER_ANOTHER;
2754 }
2755
2756 alen = arp_hdr_len(bond->dev);
2757
2758 slave_dbg(bond->dev, slave->dev, "%s: skb->dev %s\n",
2759 __func__, skb->dev->name);
2760
2761 if (alen > skb_headlen(skb)) {
2762 arp = kmalloc(alen, GFP_ATOMIC);
2763 if (!arp)
2764 goto out_unlock;
2765 if (skb_copy_bits(skb, 0, arp, alen) < 0)
2766 goto out_unlock;
2767 }
2768
2769 if (arp->ar_hln != bond->dev->addr_len ||
2770 skb->pkt_type == PACKET_OTHERHOST ||
2771 skb->pkt_type == PACKET_LOOPBACK ||
2772 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2773 arp->ar_pro != htons(ETH_P_IP) ||
2774 arp->ar_pln != 4)
2775 goto out_unlock;
2776
2777 arp_ptr = (unsigned char *)(arp + 1);
2778 arp_ptr += bond->dev->addr_len;
2779 memcpy(&sip, arp_ptr, 4);
2780 arp_ptr += 4 + bond->dev->addr_len;
2781 memcpy(&tip, arp_ptr, 4);
2782
2783 slave_dbg(bond->dev, slave->dev, "%s: %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2784 __func__, slave->dev->name, bond_slave_state(slave),
2785 bond->params.arp_validate, slave_do_arp_validate(bond, slave),
2786 &sip, &tip);
2787
2788 curr_active_slave = rcu_dereference(bond->curr_active_slave);
2789 curr_arp_slave = rcu_dereference(bond->current_arp_slave);
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814 if (bond_is_active_slave(slave))
2815 bond_validate_arp(bond, slave, sip, tip);
2816 else if (curr_active_slave &&
2817 time_after(slave_last_rx(bond, curr_active_slave),
2818 curr_active_slave->last_link_up))
2819 bond_validate_arp(bond, slave, tip, sip);
2820 else if (curr_arp_slave && (arp->ar_op == htons(ARPOP_REPLY)) &&
2821 bond_time_in_interval(bond,
2822 dev_trans_start(curr_arp_slave->dev), 1))
2823 bond_validate_arp(bond, slave, sip, tip);
2824
2825out_unlock:
2826 if (arp != (struct arphdr *)skb->data)
2827 kfree(arp);
2828 return RX_HANDLER_ANOTHER;
2829}
2830
2831
2832
2833
2834
2835static bool bond_time_in_interval(struct bonding *bond, unsigned long last_act,
2836 int mod)
2837{
2838 int delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
2839
2840 return time_in_range(jiffies,
2841 last_act - delta_in_ticks,
2842 last_act + mod * delta_in_ticks + delta_in_ticks/2);
2843}
2844
2845
2846
2847
2848
2849
2850
2851static void bond_loadbalance_arp_mon(struct bonding *bond)
2852{
2853 struct slave *slave, *oldcurrent;
2854 struct list_head *iter;
2855 int do_failover = 0, slave_state_changed = 0;
2856
2857 if (!bond_has_slaves(bond))
2858 goto re_arm;
2859
2860 rcu_read_lock();
2861
2862 oldcurrent = rcu_dereference(bond->curr_active_slave);
2863
2864
2865
2866
2867
2868
2869
2870
2871 bond_for_each_slave_rcu(bond, slave, iter) {
2872 unsigned long trans_start = dev_trans_start(slave->dev);
2873
2874 bond_propose_link_state(slave, BOND_LINK_NOCHANGE);
2875
2876 if (slave->link != BOND_LINK_UP) {
2877 if (bond_time_in_interval(bond, trans_start, 1) &&
2878 bond_time_in_interval(bond, slave->last_rx, 1)) {
2879
2880 bond_propose_link_state(slave, BOND_LINK_UP);
2881 slave_state_changed = 1;
2882
2883
2884
2885
2886
2887
2888 if (!oldcurrent) {
2889 slave_info(bond->dev, slave->dev, "link status definitely up\n");
2890 do_failover = 1;
2891 } else {
2892 slave_info(bond->dev, slave->dev, "interface is now up\n");
2893 }
2894 }
2895 } else {
2896
2897
2898
2899
2900
2901
2902 if (!bond_time_in_interval(bond, trans_start, 2) ||
2903 !bond_time_in_interval(bond, slave->last_rx, 2)) {
2904
2905 bond_propose_link_state(slave, BOND_LINK_DOWN);
2906 slave_state_changed = 1;
2907
2908 if (slave->link_failure_count < UINT_MAX)
2909 slave->link_failure_count++;
2910
2911 slave_info(bond->dev, slave->dev, "interface is now down\n");
2912
2913 if (slave == oldcurrent)
2914 do_failover = 1;
2915 }
2916 }
2917
2918
2919
2920
2921
2922
2923
2924
2925 if (bond_slave_is_up(slave))
2926 bond_arp_send_all(bond, slave);
2927 }
2928
2929 rcu_read_unlock();
2930
2931 if (do_failover || slave_state_changed) {
2932 if (!rtnl_trylock())
2933 goto re_arm;
2934
2935 bond_for_each_slave(bond, slave, iter) {
2936 if (slave->link_new_state != BOND_LINK_NOCHANGE)
2937 slave->link = slave->link_new_state;
2938 }
2939
2940 if (slave_state_changed) {
2941 bond_slave_state_change(bond);
2942 if (BOND_MODE(bond) == BOND_MODE_XOR)
2943 bond_update_slave_arr(bond, NULL);
2944 }
2945 if (do_failover) {
2946 block_netpoll_tx();
2947 bond_select_active_slave(bond);
2948 unblock_netpoll_tx();
2949 }
2950 rtnl_unlock();
2951 }
2952
2953re_arm:
2954 if (bond->params.arp_interval)
2955 queue_delayed_work(bond->wq, &bond->arp_work,
2956 msecs_to_jiffies(bond->params.arp_interval));
2957}
2958
2959
2960
2961
2962
2963
2964
2965
2966static int bond_ab_arp_inspect(struct bonding *bond)
2967{
2968 unsigned long trans_start, last_rx;
2969 struct list_head *iter;
2970 struct slave *slave;
2971 int commit = 0;
2972
2973 bond_for_each_slave_rcu(bond, slave, iter) {
2974 bond_propose_link_state(slave, BOND_LINK_NOCHANGE);
2975 last_rx = slave_last_rx(bond, slave);
2976
2977 if (slave->link != BOND_LINK_UP) {
2978 if (bond_time_in_interval(bond, last_rx, 1)) {
2979 bond_propose_link_state(slave, BOND_LINK_UP);
2980 commit++;
2981 } else if (slave->link == BOND_LINK_BACK) {
2982 bond_propose_link_state(slave, BOND_LINK_FAIL);
2983 commit++;
2984 }
2985 continue;
2986 }
2987
2988
2989
2990
2991
2992 if (bond_time_in_interval(bond, slave->last_link_up, 2))
2993 continue;
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007 if (!bond_is_active_slave(slave) &&
3008 !rcu_access_pointer(bond->current_arp_slave) &&
3009 !bond_time_in_interval(bond, last_rx, 3)) {
3010 bond_propose_link_state(slave, BOND_LINK_DOWN);
3011 commit++;
3012 }
3013
3014
3015
3016
3017
3018
3019 trans_start = dev_trans_start(slave->dev);
3020 if (bond_is_active_slave(slave) &&
3021 (!bond_time_in_interval(bond, trans_start, 2) ||
3022 !bond_time_in_interval(bond, last_rx, 2))) {
3023 bond_propose_link_state(slave, BOND_LINK_DOWN);
3024 commit++;
3025 }
3026 }
3027
3028 return commit;
3029}
3030
3031
3032
3033
3034
3035
3036static void bond_ab_arp_commit(struct bonding *bond)
3037{
3038 unsigned long trans_start;
3039 struct list_head *iter;
3040 struct slave *slave;
3041
3042 bond_for_each_slave(bond, slave, iter) {
3043 switch (slave->link_new_state) {
3044 case BOND_LINK_NOCHANGE:
3045 continue;
3046
3047 case BOND_LINK_UP:
3048 trans_start = dev_trans_start(slave->dev);
3049 if (rtnl_dereference(bond->curr_active_slave) != slave ||
3050 (!rtnl_dereference(bond->curr_active_slave) &&
3051 bond_time_in_interval(bond, trans_start, 1))) {
3052 struct slave *current_arp_slave;
3053
3054 current_arp_slave = rtnl_dereference(bond->current_arp_slave);
3055 bond_set_slave_link_state(slave, BOND_LINK_UP,
3056 BOND_SLAVE_NOTIFY_NOW);
3057 if (current_arp_slave) {
3058 bond_set_slave_inactive_flags(
3059 current_arp_slave,
3060 BOND_SLAVE_NOTIFY_NOW);
3061 RCU_INIT_POINTER(bond->current_arp_slave, NULL);
3062 }
3063
3064 slave_info(bond->dev, slave->dev, "link status definitely up\n");
3065
3066 if (!rtnl_dereference(bond->curr_active_slave) ||
3067 slave == rtnl_dereference(bond->primary_slave))
3068 goto do_failover;
3069
3070 }
3071
3072 continue;
3073
3074 case BOND_LINK_DOWN:
3075 if (slave->link_failure_count < UINT_MAX)
3076 slave->link_failure_count++;
3077
3078 bond_set_slave_link_state(slave, BOND_LINK_DOWN,
3079 BOND_SLAVE_NOTIFY_NOW);
3080 bond_set_slave_inactive_flags(slave,
3081 BOND_SLAVE_NOTIFY_NOW);
3082
3083 slave_info(bond->dev, slave->dev, "link status definitely down, disabling slave\n");
3084
3085 if (slave == rtnl_dereference(bond->curr_active_slave)) {
3086 RCU_INIT_POINTER(bond->current_arp_slave, NULL);
3087 goto do_failover;
3088 }
3089
3090 continue;
3091
3092 case BOND_LINK_FAIL:
3093 bond_set_slave_link_state(slave, BOND_LINK_FAIL,
3094 BOND_SLAVE_NOTIFY_NOW);
3095 bond_set_slave_inactive_flags(slave,
3096 BOND_SLAVE_NOTIFY_NOW);
3097
3098
3099
3100
3101 if (rtnl_dereference(bond->curr_active_slave))
3102 RCU_INIT_POINTER(bond->current_arp_slave, NULL);
3103 continue;
3104
3105 default:
3106 slave_err(bond->dev, slave->dev,
3107 "impossible: link_new_state %d on slave\n",
3108 slave->link_new_state);
3109 continue;
3110 }
3111
3112do_failover:
3113 block_netpoll_tx();
3114 bond_select_active_slave(bond);
3115 unblock_netpoll_tx();
3116 }
3117
3118 bond_set_carrier(bond);
3119}
3120
3121
3122
3123
3124
3125static bool bond_ab_arp_probe(struct bonding *bond)
3126{
3127 struct slave *slave, *before = NULL, *new_slave = NULL,
3128 *curr_arp_slave = rcu_dereference(bond->current_arp_slave),
3129 *curr_active_slave = rcu_dereference(bond->curr_active_slave);
3130 struct list_head *iter;
3131 bool found = false;
3132 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
3133
3134 if (curr_arp_slave && curr_active_slave)
3135 netdev_info(bond->dev, "PROBE: c_arp %s && cas %s BAD\n",
3136 curr_arp_slave->dev->name,
3137 curr_active_slave->dev->name);
3138
3139 if (curr_active_slave) {
3140 bond_arp_send_all(bond, curr_active_slave);
3141 return should_notify_rtnl;
3142 }
3143
3144
3145
3146
3147
3148
3149 if (!curr_arp_slave) {
3150 curr_arp_slave = bond_first_slave_rcu(bond);
3151 if (!curr_arp_slave)
3152 return should_notify_rtnl;
3153 }
3154
3155 bond_for_each_slave_rcu(bond, slave, iter) {
3156 if (!found && !before && bond_slave_is_up(slave))
3157 before = slave;
3158
3159 if (found && !new_slave && bond_slave_is_up(slave))
3160 new_slave = slave;
3161
3162
3163
3164
3165
3166
3167
3168 if (!bond_slave_is_up(slave) && slave->link == BOND_LINK_UP) {
3169 bond_set_slave_link_state(slave, BOND_LINK_DOWN,
3170 BOND_SLAVE_NOTIFY_LATER);
3171 if (slave->link_failure_count < UINT_MAX)
3172 slave->link_failure_count++;
3173
3174 bond_set_slave_inactive_flags(slave,
3175 BOND_SLAVE_NOTIFY_LATER);
3176
3177 slave_info(bond->dev, slave->dev, "backup interface is now down\n");
3178 }
3179 if (slave == curr_arp_slave)
3180 found = true;
3181 }
3182
3183 if (!new_slave && before)
3184 new_slave = before;
3185
3186 if (!new_slave)
3187 goto check_state;
3188
3189 bond_set_slave_link_state(new_slave, BOND_LINK_BACK,
3190 BOND_SLAVE_NOTIFY_LATER);
3191 bond_set_slave_active_flags(new_slave, BOND_SLAVE_NOTIFY_LATER);
3192 bond_arp_send_all(bond, new_slave);
3193 new_slave->last_link_up = jiffies;
3194 rcu_assign_pointer(bond->current_arp_slave, new_slave);
3195
3196check_state:
3197 bond_for_each_slave_rcu(bond, slave, iter) {
3198 if (slave->should_notify || slave->should_notify_link) {
3199 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
3200 break;
3201 }
3202 }
3203 return should_notify_rtnl;
3204}
3205
3206static void bond_activebackup_arp_mon(struct bonding *bond)
3207{
3208 bool should_notify_peers = false;
3209 bool should_notify_rtnl = false;
3210 int delta_in_ticks;
3211
3212 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
3213
3214 if (!bond_has_slaves(bond))
3215 goto re_arm;
3216
3217 rcu_read_lock();
3218
3219 should_notify_peers = bond_should_notify_peers(bond);
3220
3221 if (bond_ab_arp_inspect(bond)) {
3222 rcu_read_unlock();
3223
3224
3225 if (!rtnl_trylock()) {
3226 delta_in_ticks = 1;
3227 should_notify_peers = false;
3228 goto re_arm;
3229 }
3230
3231 bond_ab_arp_commit(bond);
3232
3233 rtnl_unlock();
3234 rcu_read_lock();
3235 }
3236
3237 should_notify_rtnl = bond_ab_arp_probe(bond);
3238 rcu_read_unlock();
3239
3240re_arm:
3241 if (bond->params.arp_interval)
3242 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
3243
3244 if (should_notify_peers || should_notify_rtnl) {
3245 if (!rtnl_trylock())
3246 return;
3247
3248 if (should_notify_peers)
3249 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS,
3250 bond->dev);
3251 if (should_notify_rtnl) {
3252 bond_slave_state_notify(bond);
3253 bond_slave_link_notify(bond);
3254 }
3255
3256 rtnl_unlock();
3257 }
3258}
3259
3260static void bond_arp_monitor(struct work_struct *work)
3261{
3262 struct bonding *bond = container_of(work, struct bonding,
3263 arp_work.work);
3264
3265 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
3266 bond_activebackup_arp_mon(bond);
3267 else
3268 bond_loadbalance_arp_mon(bond);
3269}
3270
3271
3272
3273
3274static int bond_event_changename(struct bonding *bond)
3275{
3276 bond_remove_proc_entry(bond);
3277 bond_create_proc_entry(bond);
3278
3279 bond_debug_reregister(bond);
3280
3281 return NOTIFY_DONE;
3282}
3283
3284static int bond_master_netdev_event(unsigned long event,
3285 struct net_device *bond_dev)
3286{
3287 struct bonding *event_bond = netdev_priv(bond_dev);
3288
3289 netdev_dbg(bond_dev, "%s called\n", __func__);
3290
3291 switch (event) {
3292 case NETDEV_CHANGENAME:
3293 return bond_event_changename(event_bond);
3294 case NETDEV_UNREGISTER:
3295 bond_remove_proc_entry(event_bond);
3296 break;
3297 case NETDEV_REGISTER:
3298 bond_create_proc_entry(event_bond);
3299 break;
3300 default:
3301 break;
3302 }
3303
3304 return NOTIFY_DONE;
3305}
3306
3307static int bond_slave_netdev_event(unsigned long event,
3308 struct net_device *slave_dev)
3309{
3310 struct slave *slave = bond_slave_get_rtnl(slave_dev), *primary;
3311 struct bonding *bond;
3312 struct net_device *bond_dev;
3313
3314
3315
3316
3317
3318 if (!slave) {
3319 netdev_dbg(slave_dev, "%s called on NULL slave\n", __func__);
3320 return NOTIFY_DONE;
3321 }
3322
3323 bond_dev = slave->bond->dev;
3324 bond = slave->bond;
3325 primary = rtnl_dereference(bond->primary_slave);
3326
3327 slave_dbg(bond_dev, slave_dev, "%s called\n", __func__);
3328
3329 switch (event) {
3330 case NETDEV_UNREGISTER:
3331 if (bond_dev->type != ARPHRD_ETHER)
3332 bond_release_and_destroy(bond_dev, slave_dev);
3333 else
3334 __bond_release_one(bond_dev, slave_dev, false, true);
3335 break;
3336 case NETDEV_UP:
3337 case NETDEV_CHANGE:
3338
3339
3340
3341
3342
3343
3344
3345 if (bond_update_speed_duplex(slave) &&
3346 BOND_MODE(bond) == BOND_MODE_8023AD) {
3347 if (slave->last_link_up)
3348 slave->link = BOND_LINK_FAIL;
3349 else
3350 slave->link = BOND_LINK_DOWN;
3351 }
3352
3353 if (BOND_MODE(bond) == BOND_MODE_8023AD)
3354 bond_3ad_adapter_speed_duplex_changed(slave);
3355 fallthrough;
3356 case NETDEV_DOWN:
3357
3358
3359
3360
3361
3362
3363
3364
3365 if (bond_mode_can_use_xmit_hash(bond))
3366 bond_update_slave_arr(bond, NULL);
3367 break;
3368 case NETDEV_CHANGEMTU:
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380 break;
3381 case NETDEV_CHANGENAME:
3382
3383 if (!bond_uses_primary(bond) ||
3384 !bond->params.primary[0])
3385 break;
3386
3387 if (slave == primary) {
3388
3389 RCU_INIT_POINTER(bond->primary_slave, NULL);
3390 } else if (!strcmp(slave_dev->name, bond->params.primary)) {
3391
3392 rcu_assign_pointer(bond->primary_slave, slave);
3393 } else {
3394 break;
3395 }
3396
3397 netdev_info(bond->dev, "Primary slave changed to %s, reselecting active slave\n",
3398 primary ? slave_dev->name : "none");
3399
3400 block_netpoll_tx();
3401 bond_select_active_slave(bond);
3402 unblock_netpoll_tx();
3403 break;
3404 case NETDEV_FEAT_CHANGE:
3405 bond_compute_features(bond);
3406 break;
3407 case NETDEV_RESEND_IGMP:
3408
3409 call_netdevice_notifiers(event, slave->bond->dev);
3410 break;
3411 default:
3412 break;
3413 }
3414
3415 return NOTIFY_DONE;
3416}
3417
3418
3419
3420
3421
3422
3423
3424
3425static int bond_netdev_event(struct notifier_block *this,
3426 unsigned long event, void *ptr)
3427{
3428 struct net_device *event_dev = netdev_notifier_info_to_dev(ptr);
3429
3430 netdev_dbg(event_dev, "%s received %s\n",
3431 __func__, netdev_cmd_to_name(event));
3432
3433 if (!(event_dev->priv_flags & IFF_BONDING))
3434 return NOTIFY_DONE;
3435
3436 if (event_dev->flags & IFF_MASTER) {
3437 int ret;
3438
3439 ret = bond_master_netdev_event(event, event_dev);
3440 if (ret != NOTIFY_DONE)
3441 return ret;
3442 }
3443
3444 if (event_dev->flags & IFF_SLAVE)
3445 return bond_slave_netdev_event(event, event_dev);
3446
3447 return NOTIFY_DONE;
3448}
3449
3450static struct notifier_block bond_netdev_notifier = {
3451 .notifier_call = bond_netdev_event,
3452};
3453
3454
3455
3456
3457static inline u32 bond_eth_hash(struct sk_buff *skb)
3458{
3459 struct ethhdr *ep, hdr_tmp;
3460
3461 ep = skb_header_pointer(skb, 0, sizeof(hdr_tmp), &hdr_tmp);
3462 if (ep)
3463 return ep->h_dest[5] ^ ep->h_source[5] ^ ep->h_proto;
3464 return 0;
3465}
3466
3467static bool bond_flow_ip(struct sk_buff *skb, struct flow_keys *fk,
3468 int *noff, int *proto, bool l34)
3469{
3470 const struct ipv6hdr *iph6;
3471 const struct iphdr *iph;
3472
3473 if (skb->protocol == htons(ETH_P_IP)) {
3474 if (unlikely(!pskb_may_pull(skb, *noff + sizeof(*iph))))
3475 return false;
3476 iph = (const struct iphdr *)(skb->data + *noff);
3477 iph_to_flow_copy_v4addrs(fk, iph);
3478 *noff += iph->ihl << 2;
3479 if (!ip_is_fragment(iph))
3480 *proto = iph->protocol;
3481 } else if (skb->protocol == htons(ETH_P_IPV6)) {
3482 if (unlikely(!pskb_may_pull(skb, *noff + sizeof(*iph6))))
3483 return false;
3484 iph6 = (const struct ipv6hdr *)(skb->data + *noff);
3485 iph_to_flow_copy_v6addrs(fk, iph6);
3486 *noff += sizeof(*iph6);
3487 *proto = iph6->nexthdr;
3488 } else {
3489 return false;
3490 }
3491
3492 if (l34 && *proto >= 0)
3493 fk->ports.ports = skb_flow_get_ports(skb, *noff, *proto);
3494
3495 return true;
3496}
3497
3498
3499static bool bond_flow_dissect(struct bonding *bond, struct sk_buff *skb,
3500 struct flow_keys *fk)
3501{
3502 bool l34 = bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34;
3503 int noff, proto = -1;
3504
3505 if (bond->params.xmit_policy > BOND_XMIT_POLICY_LAYER23) {
3506 memset(fk, 0, sizeof(*fk));
3507 return __skb_flow_dissect(NULL, skb, &flow_keys_bonding,
3508 fk, NULL, 0, 0, 0, 0);
3509 }
3510
3511 fk->ports.ports = 0;
3512 memset(&fk->icmp, 0, sizeof(fk->icmp));
3513 noff = skb_network_offset(skb);
3514 if (!bond_flow_ip(skb, fk, &noff, &proto, l34))
3515 return false;
3516
3517
3518
3519
3520
3521
3522 if (proto == IPPROTO_ICMP || proto == IPPROTO_ICMPV6) {
3523 skb_flow_get_icmp_tci(skb, &fk->icmp, skb->data,
3524 skb_transport_offset(skb),
3525 skb_headlen(skb));
3526 if (proto == IPPROTO_ICMP) {
3527 if (!icmp_is_err(fk->icmp.type))
3528 return true;
3529
3530 noff += sizeof(struct icmphdr);
3531 } else if (proto == IPPROTO_ICMPV6) {
3532 if (!icmpv6_is_err(fk->icmp.type))
3533 return true;
3534
3535 noff += sizeof(struct icmp6hdr);
3536 }
3537 return bond_flow_ip(skb, fk, &noff, &proto, l34);
3538 }
3539
3540 return true;
3541}
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb)
3552{
3553 struct flow_keys flow;
3554 u32 hash;
3555
3556 if (bond->params.xmit_policy == BOND_XMIT_POLICY_ENCAP34 &&
3557 skb->l4_hash)
3558 return skb->hash;
3559
3560 if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER2 ||
3561 !bond_flow_dissect(bond, skb, &flow))
3562 return bond_eth_hash(skb);
3563
3564 if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER23 ||
3565 bond->params.xmit_policy == BOND_XMIT_POLICY_ENCAP23) {
3566 hash = bond_eth_hash(skb);
3567 } else {
3568 if (flow.icmp.id)
3569 memcpy(&hash, &flow.icmp, sizeof(hash));
3570 else
3571 memcpy(&hash, &flow.ports.ports, sizeof(hash));
3572 }
3573 hash ^= (__force u32)flow_get_u32_dst(&flow) ^
3574 (__force u32)flow_get_u32_src(&flow);
3575 hash ^= (hash >> 16);
3576 hash ^= (hash >> 8);
3577
3578 return hash >> 1;
3579}
3580
3581
3582
3583void bond_work_init_all(struct bonding *bond)
3584{
3585 INIT_DELAYED_WORK(&bond->mcast_work,
3586 bond_resend_igmp_join_requests_delayed);
3587 INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
3588 INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
3589 INIT_DELAYED_WORK(&bond->arp_work, bond_arp_monitor);
3590 INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
3591 INIT_DELAYED_WORK(&bond->slave_arr_work, bond_slave_arr_handler);
3592}
3593
3594static void bond_work_cancel_all(struct bonding *bond)
3595{
3596 cancel_delayed_work_sync(&bond->mii_work);
3597 cancel_delayed_work_sync(&bond->arp_work);
3598 cancel_delayed_work_sync(&bond->alb_work);
3599 cancel_delayed_work_sync(&bond->ad_work);
3600 cancel_delayed_work_sync(&bond->mcast_work);
3601 cancel_delayed_work_sync(&bond->slave_arr_work);
3602}
3603
3604static int bond_open(struct net_device *bond_dev)
3605{
3606 struct bonding *bond = netdev_priv(bond_dev);
3607 struct list_head *iter;
3608 struct slave *slave;
3609
3610
3611 if (bond_has_slaves(bond)) {
3612 bond_for_each_slave(bond, slave, iter) {
3613 if (bond_uses_primary(bond) &&
3614 slave != rcu_access_pointer(bond->curr_active_slave)) {
3615 bond_set_slave_inactive_flags(slave,
3616 BOND_SLAVE_NOTIFY_NOW);
3617 } else if (BOND_MODE(bond) != BOND_MODE_8023AD) {
3618 bond_set_slave_active_flags(slave,
3619 BOND_SLAVE_NOTIFY_NOW);
3620 }
3621 }
3622 }
3623
3624 if (bond_is_lb(bond)) {
3625
3626
3627
3628 if (bond_alb_initialize(bond, (BOND_MODE(bond) == BOND_MODE_ALB)))
3629 return -ENOMEM;
3630 if (bond->params.tlb_dynamic_lb || BOND_MODE(bond) == BOND_MODE_ALB)
3631 queue_delayed_work(bond->wq, &bond->alb_work, 0);
3632 }
3633
3634 if (bond->params.miimon)
3635 queue_delayed_work(bond->wq, &bond->mii_work, 0);
3636
3637 if (bond->params.arp_interval) {
3638 queue_delayed_work(bond->wq, &bond->arp_work, 0);
3639 bond->recv_probe = bond_arp_rcv;
3640 }
3641
3642 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
3643 queue_delayed_work(bond->wq, &bond->ad_work, 0);
3644
3645 bond->recv_probe = bond_3ad_lacpdu_recv;
3646 bond_3ad_initiate_agg_selection(bond, 1);
3647 }
3648
3649 if (bond_mode_can_use_xmit_hash(bond))
3650 bond_update_slave_arr(bond, NULL);
3651
3652 return 0;
3653}
3654
3655static int bond_close(struct net_device *bond_dev)
3656{
3657 struct bonding *bond = netdev_priv(bond_dev);
3658
3659 bond_work_cancel_all(bond);
3660 bond->send_peer_notif = 0;
3661 if (bond_is_lb(bond))
3662 bond_alb_deinitialize(bond);
3663 bond->recv_probe = NULL;
3664
3665 return 0;
3666}
3667
3668
3669
3670
3671static void bond_fold_stats(struct rtnl_link_stats64 *_res,
3672 const struct rtnl_link_stats64 *_new,
3673 const struct rtnl_link_stats64 *_old)
3674{
3675 const u64 *new = (const u64 *)_new;
3676 const u64 *old = (const u64 *)_old;
3677 u64 *res = (u64 *)_res;
3678 int i;
3679
3680 for (i = 0; i < sizeof(*_res) / sizeof(u64); i++) {
3681 u64 nv = new[i];
3682 u64 ov = old[i];
3683 s64 delta = nv - ov;
3684
3685
3686 if (((nv | ov) >> 32) == 0)
3687 delta = (s64)(s32)((u32)nv - (u32)ov);
3688
3689
3690
3691
3692 if (delta > 0)
3693 res[i] += delta;
3694 }
3695}
3696
3697#ifdef CONFIG_LOCKDEP
3698static int bond_get_lowest_level_rcu(struct net_device *dev)
3699{
3700 struct net_device *ldev, *next, *now, *dev_stack[MAX_NEST_DEV + 1];
3701 struct list_head *niter, *iter, *iter_stack[MAX_NEST_DEV + 1];
3702 int cur = 0, max = 0;
3703
3704 now = dev;
3705 iter = &dev->adj_list.lower;
3706
3707 while (1) {
3708 next = NULL;
3709 while (1) {
3710 ldev = netdev_next_lower_dev_rcu(now, &iter);
3711 if (!ldev)
3712 break;
3713
3714 next = ldev;
3715 niter = &ldev->adj_list.lower;
3716 dev_stack[cur] = now;
3717 iter_stack[cur++] = iter;
3718 if (max <= cur)
3719 max = cur;
3720 break;
3721 }
3722
3723 if (!next) {
3724 if (!cur)
3725 return max;
3726 next = dev_stack[--cur];
3727 niter = iter_stack[cur];
3728 }
3729
3730 now = next;
3731 iter = niter;
3732 }
3733
3734 return max;
3735}
3736#endif
3737
3738static void bond_get_stats(struct net_device *bond_dev,
3739 struct rtnl_link_stats64 *stats)
3740{
3741 struct bonding *bond = netdev_priv(bond_dev);
3742 struct rtnl_link_stats64 temp;
3743 struct list_head *iter;
3744 struct slave *slave;
3745 int nest_level = 0;
3746
3747
3748 rcu_read_lock();
3749#ifdef CONFIG_LOCKDEP
3750 nest_level = bond_get_lowest_level_rcu(bond_dev);
3751#endif
3752
3753 spin_lock_nested(&bond->stats_lock, nest_level);
3754 memcpy(stats, &bond->bond_stats, sizeof(*stats));
3755
3756 bond_for_each_slave_rcu(bond, slave, iter) {
3757 const struct rtnl_link_stats64 *new =
3758 dev_get_stats(slave->dev, &temp);
3759
3760 bond_fold_stats(stats, new, &slave->slave_stats);
3761
3762
3763 memcpy(&slave->slave_stats, new, sizeof(*new));
3764 }
3765
3766 memcpy(&bond->bond_stats, stats, sizeof(*stats));
3767 spin_unlock(&bond->stats_lock);
3768 rcu_read_unlock();
3769}
3770
3771static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3772{
3773 struct bonding *bond = netdev_priv(bond_dev);
3774 struct net_device *slave_dev = NULL;
3775 struct ifbond k_binfo;
3776 struct ifbond __user *u_binfo = NULL;
3777 struct ifslave k_sinfo;
3778 struct ifslave __user *u_sinfo = NULL;
3779 struct mii_ioctl_data *mii = NULL;
3780 struct bond_opt_value newval;
3781 struct net *net;
3782 int res = 0;
3783
3784 netdev_dbg(bond_dev, "bond_ioctl: cmd=%d\n", cmd);
3785
3786 switch (cmd) {
3787 case SIOCGMIIPHY:
3788 mii = if_mii(ifr);
3789 if (!mii)
3790 return -EINVAL;
3791
3792 mii->phy_id = 0;
3793 fallthrough;
3794 case SIOCGMIIREG:
3795
3796
3797
3798 mii = if_mii(ifr);
3799 if (!mii)
3800 return -EINVAL;
3801
3802 if (mii->reg_num == 1) {
3803 mii->val_out = 0;
3804 if (netif_carrier_ok(bond->dev))
3805 mii->val_out = BMSR_LSTATUS;
3806 }
3807
3808 return 0;
3809 case BOND_INFO_QUERY_OLD:
3810 case SIOCBONDINFOQUERY:
3811 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3812
3813 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond)))
3814 return -EFAULT;
3815
3816 bond_info_query(bond_dev, &k_binfo);
3817 if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond)))
3818 return -EFAULT;
3819
3820 return 0;
3821 case BOND_SLAVE_INFO_QUERY_OLD:
3822 case SIOCBONDSLAVEINFOQUERY:
3823 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3824
3825 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave)))
3826 return -EFAULT;
3827
3828 res = bond_slave_info_query(bond_dev, &k_sinfo);
3829 if (res == 0 &&
3830 copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave)))
3831 return -EFAULT;
3832
3833 return res;
3834 default:
3835 break;
3836 }
3837
3838 net = dev_net(bond_dev);
3839
3840 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
3841 return -EPERM;
3842
3843 slave_dev = __dev_get_by_name(net, ifr->ifr_slave);
3844
3845 slave_dbg(bond_dev, slave_dev, "slave_dev=%p:\n", slave_dev);
3846
3847 if (!slave_dev)
3848 return -ENODEV;
3849
3850 switch (cmd) {
3851 case BOND_ENSLAVE_OLD:
3852 case SIOCBONDENSLAVE:
3853 res = bond_enslave(bond_dev, slave_dev, NULL);
3854 break;
3855 case BOND_RELEASE_OLD:
3856 case SIOCBONDRELEASE:
3857 res = bond_release(bond_dev, slave_dev);
3858 break;
3859 case BOND_SETHWADDR_OLD:
3860 case SIOCBONDSETHWADDR:
3861 res = bond_set_dev_addr(bond_dev, slave_dev);
3862 break;
3863 case BOND_CHANGE_ACTIVE_OLD:
3864 case SIOCBONDCHANGEACTIVE:
3865 bond_opt_initstr(&newval, slave_dev->name);
3866 res = __bond_opt_set_notify(bond, BOND_OPT_ACTIVE_SLAVE,
3867 &newval);
3868 break;
3869 default:
3870 res = -EOPNOTSUPP;
3871 }
3872
3873 return res;
3874}
3875
3876static void bond_change_rx_flags(struct net_device *bond_dev, int change)
3877{
3878 struct bonding *bond = netdev_priv(bond_dev);
3879
3880 if (change & IFF_PROMISC)
3881 bond_set_promiscuity(bond,
3882 bond_dev->flags & IFF_PROMISC ? 1 : -1);
3883
3884 if (change & IFF_ALLMULTI)
3885 bond_set_allmulti(bond,
3886 bond_dev->flags & IFF_ALLMULTI ? 1 : -1);
3887}
3888
3889static void bond_set_rx_mode(struct net_device *bond_dev)
3890{
3891 struct bonding *bond = netdev_priv(bond_dev);
3892 struct list_head *iter;
3893 struct slave *slave;
3894
3895 rcu_read_lock();
3896 if (bond_uses_primary(bond)) {
3897 slave = rcu_dereference(bond->curr_active_slave);
3898 if (slave) {
3899 dev_uc_sync(slave->dev, bond_dev);
3900 dev_mc_sync(slave->dev, bond_dev);
3901 }
3902 } else {
3903 bond_for_each_slave_rcu(bond, slave, iter) {
3904 dev_uc_sync_multiple(slave->dev, bond_dev);
3905 dev_mc_sync_multiple(slave->dev, bond_dev);
3906 }
3907 }
3908 rcu_read_unlock();
3909}
3910
3911static int bond_neigh_init(struct neighbour *n)
3912{
3913 struct bonding *bond = netdev_priv(n->dev);
3914 const struct net_device_ops *slave_ops;
3915 struct neigh_parms parms;
3916 struct slave *slave;
3917 int ret = 0;
3918
3919 rcu_read_lock();
3920 slave = bond_first_slave_rcu(bond);
3921 if (!slave)
3922 goto out;
3923 slave_ops = slave->dev->netdev_ops;
3924 if (!slave_ops->ndo_neigh_setup)
3925 goto out;
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935 memset(&parms, 0, sizeof(parms));
3936 ret = slave_ops->ndo_neigh_setup(slave->dev, &parms);
3937
3938 if (ret)
3939 goto out;
3940
3941 if (parms.neigh_setup)
3942 ret = parms.neigh_setup(n);
3943out:
3944 rcu_read_unlock();
3945 return ret;
3946}
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956static int bond_neigh_setup(struct net_device *dev,
3957 struct neigh_parms *parms)
3958{
3959
3960 if (parms->dev == dev)
3961 parms->neigh_setup = bond_neigh_init;
3962
3963 return 0;
3964}
3965
3966
3967static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
3968{
3969 struct bonding *bond = netdev_priv(bond_dev);
3970 struct slave *slave, *rollback_slave;
3971 struct list_head *iter;
3972 int res = 0;
3973
3974 netdev_dbg(bond_dev, "bond=%p, new_mtu=%d\n", bond, new_mtu);
3975
3976 bond_for_each_slave(bond, slave, iter) {
3977 slave_dbg(bond_dev, slave->dev, "s %p c_m %p\n",
3978 slave, slave->dev->netdev_ops->ndo_change_mtu);
3979
3980 res = dev_set_mtu(slave->dev, new_mtu);
3981
3982 if (res) {
3983
3984
3985
3986
3987
3988
3989
3990
3991 slave_dbg(bond_dev, slave->dev, "err %d setting mtu to %d\n",
3992 res, new_mtu);
3993 goto unwind;
3994 }
3995 }
3996
3997 bond_dev->mtu = new_mtu;
3998
3999 return 0;
4000
4001unwind:
4002
4003 bond_for_each_slave(bond, rollback_slave, iter) {
4004 int tmp_res;
4005
4006 if (rollback_slave == slave)
4007 break;
4008
4009 tmp_res = dev_set_mtu(rollback_slave->dev, bond_dev->mtu);
4010 if (tmp_res)
4011 slave_dbg(bond_dev, rollback_slave->dev, "unwind err %d\n",
4012 tmp_res);
4013 }
4014
4015 return res;
4016}
4017
4018
4019
4020
4021
4022
4023
4024static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
4025{
4026 struct bonding *bond = netdev_priv(bond_dev);
4027 struct slave *slave, *rollback_slave;
4028 struct sockaddr_storage *ss = addr, tmp_ss;
4029 struct list_head *iter;
4030 int res = 0;
4031
4032 if (BOND_MODE(bond) == BOND_MODE_ALB)
4033 return bond_alb_set_mac_address(bond_dev, addr);
4034
4035
4036 netdev_dbg(bond_dev, "%s: bond=%p\n", __func__, bond);
4037
4038
4039
4040
4041 if (bond->params.fail_over_mac &&
4042 BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
4043 return 0;
4044
4045 if (!is_valid_ether_addr(ss->__data))
4046 return -EADDRNOTAVAIL;
4047
4048 bond_for_each_slave(bond, slave, iter) {
4049 slave_dbg(bond_dev, slave->dev, "%s: slave=%p\n",
4050 __func__, slave);
4051 res = dev_set_mac_address(slave->dev, addr, NULL);
4052 if (res) {
4053
4054
4055
4056
4057
4058
4059 slave_dbg(bond_dev, slave->dev, "%s: err %d\n",
4060 __func__, res);
4061 goto unwind;
4062 }
4063 }
4064
4065
4066 memcpy(bond_dev->dev_addr, ss->__data, bond_dev->addr_len);
4067 return 0;
4068
4069unwind:
4070 memcpy(tmp_ss.__data, bond_dev->dev_addr, bond_dev->addr_len);
4071 tmp_ss.ss_family = bond_dev->type;
4072
4073
4074 bond_for_each_slave(bond, rollback_slave, iter) {
4075 int tmp_res;
4076
4077 if (rollback_slave == slave)
4078 break;
4079
4080 tmp_res = dev_set_mac_address(rollback_slave->dev,
4081 (struct sockaddr *)&tmp_ss, NULL);
4082 if (tmp_res) {
4083 slave_dbg(bond_dev, rollback_slave->dev, "%s: unwind err %d\n",
4084 __func__, tmp_res);
4085 }
4086 }
4087
4088 return res;
4089}
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099static struct slave *bond_get_slave_by_id(struct bonding *bond,
4100 int slave_id)
4101{
4102 struct list_head *iter;
4103 struct slave *slave;
4104 int i = slave_id;
4105
4106
4107 bond_for_each_slave_rcu(bond, slave, iter) {
4108 if (--i < 0) {
4109 if (bond_slave_can_tx(slave))
4110 return slave;
4111 }
4112 }
4113
4114
4115 i = slave_id;
4116 bond_for_each_slave_rcu(bond, slave, iter) {
4117 if (--i < 0)
4118 break;
4119 if (bond_slave_can_tx(slave))
4120 return slave;
4121 }
4122
4123 return NULL;
4124}
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134static u32 bond_rr_gen_slave_id(struct bonding *bond)
4135{
4136 u32 slave_id;
4137 struct reciprocal_value reciprocal_packets_per_slave;
4138 int packets_per_slave = bond->params.packets_per_slave;
4139
4140 switch (packets_per_slave) {
4141 case 0:
4142 slave_id = prandom_u32();
4143 break;
4144 case 1:
4145 slave_id = bond->rr_tx_counter;
4146 break;
4147 default:
4148 reciprocal_packets_per_slave =
4149 bond->params.reciprocal_packets_per_slave;
4150 slave_id = reciprocal_divide(bond->rr_tx_counter,
4151 reciprocal_packets_per_slave);
4152 break;
4153 }
4154 bond->rr_tx_counter++;
4155
4156 return slave_id;
4157}
4158
4159static struct slave *bond_xmit_roundrobin_slave_get(struct bonding *bond,
4160 struct sk_buff *skb)
4161{
4162 struct slave *slave;
4163 int slave_cnt;
4164 u32 slave_id;
4165
4166
4167
4168
4169
4170
4171
4172 if (skb->protocol == htons(ETH_P_IP)) {
4173 int noff = skb_network_offset(skb);
4174 struct iphdr *iph;
4175
4176 if (unlikely(!pskb_may_pull(skb, noff + sizeof(*iph))))
4177 goto non_igmp;
4178
4179 iph = ip_hdr(skb);
4180 if (iph->protocol == IPPROTO_IGMP) {
4181 slave = rcu_dereference(bond->curr_active_slave);
4182 if (slave)
4183 return slave;
4184 return bond_get_slave_by_id(bond, 0);
4185 }
4186 }
4187
4188non_igmp:
4189 slave_cnt = READ_ONCE(bond->slave_cnt);
4190 if (likely(slave_cnt)) {
4191 slave_id = bond_rr_gen_slave_id(bond) % slave_cnt;
4192 return bond_get_slave_by_id(bond, slave_id);
4193 }
4194 return NULL;
4195}
4196
4197static netdev_tx_t bond_xmit_roundrobin(struct sk_buff *skb,
4198 struct net_device *bond_dev)
4199{
4200 struct bonding *bond = netdev_priv(bond_dev);
4201 struct slave *slave;
4202
4203 slave = bond_xmit_roundrobin_slave_get(bond, skb);
4204 if (likely(slave))
4205 return bond_dev_queue_xmit(bond, skb, slave->dev);
4206
4207 return bond_tx_drop(bond_dev, skb);
4208}
4209
4210static struct slave *bond_xmit_activebackup_slave_get(struct bonding *bond,
4211 struct sk_buff *skb)
4212{
4213 return rcu_dereference(bond->curr_active_slave);
4214}
4215
4216
4217
4218
4219static netdev_tx_t bond_xmit_activebackup(struct sk_buff *skb,
4220 struct net_device *bond_dev)
4221{
4222 struct bonding *bond = netdev_priv(bond_dev);
4223 struct slave *slave;
4224
4225 slave = bond_xmit_activebackup_slave_get(bond, skb);
4226 if (slave)
4227 return bond_dev_queue_xmit(bond, skb, slave->dev);
4228
4229 return bond_tx_drop(bond_dev, skb);
4230}
4231
4232
4233
4234
4235
4236void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay)
4237{
4238 queue_delayed_work(bond->wq, &bond->slave_arr_work, delay);
4239}
4240
4241
4242static void bond_slave_arr_handler(struct work_struct *work)
4243{
4244 struct bonding *bond = container_of(work, struct bonding,
4245 slave_arr_work.work);
4246 int ret;
4247
4248 if (!rtnl_trylock())
4249 goto err;
4250
4251 ret = bond_update_slave_arr(bond, NULL);
4252 rtnl_unlock();
4253 if (ret) {
4254 pr_warn_ratelimited("Failed to update slave array from WT\n");
4255 goto err;
4256 }
4257 return;
4258
4259err:
4260 bond_slave_arr_work_rearm(bond, 1);
4261}
4262
4263static void bond_skip_slave(struct bond_up_slave *slaves,
4264 struct slave *skipslave)
4265{
4266 int idx;
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276 for (idx = 0; slaves && idx < slaves->count; idx++) {
4277 if (skipslave == slaves->arr[idx]) {
4278 slaves->arr[idx] =
4279 slaves->arr[slaves->count - 1];
4280 slaves->count--;
4281 break;
4282 }
4283 }
4284}
4285
4286static void bond_set_slave_arr(struct bonding *bond,
4287 struct bond_up_slave *usable_slaves,
4288 struct bond_up_slave *all_slaves)
4289{
4290 struct bond_up_slave *usable, *all;
4291
4292 usable = rtnl_dereference(bond->usable_slaves);
4293 rcu_assign_pointer(bond->usable_slaves, usable_slaves);
4294 kfree_rcu(usable, rcu);
4295
4296 all = rtnl_dereference(bond->all_slaves);
4297 rcu_assign_pointer(bond->all_slaves, all_slaves);
4298 kfree_rcu(all, rcu);
4299}
4300
4301static void bond_reset_slave_arr(struct bonding *bond)
4302{
4303 struct bond_up_slave *usable, *all;
4304
4305 usable = rtnl_dereference(bond->usable_slaves);
4306 if (usable) {
4307 RCU_INIT_POINTER(bond->usable_slaves, NULL);
4308 kfree_rcu(usable, rcu);
4309 }
4310
4311 all = rtnl_dereference(bond->all_slaves);
4312 if (all) {
4313 RCU_INIT_POINTER(bond->all_slaves, NULL);
4314 kfree_rcu(all, rcu);
4315 }
4316}
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)
4327{
4328 struct bond_up_slave *usable_slaves = NULL, *all_slaves = NULL;
4329 struct slave *slave;
4330 struct list_head *iter;
4331 int agg_id = 0;
4332 int ret = 0;
4333
4334#ifdef CONFIG_LOCKDEP
4335 WARN_ON(lockdep_is_held(&bond->mode_lock));
4336#endif
4337
4338 usable_slaves = kzalloc(struct_size(usable_slaves, arr,
4339 bond->slave_cnt), GFP_KERNEL);
4340 all_slaves = kzalloc(struct_size(all_slaves, arr,
4341 bond->slave_cnt), GFP_KERNEL);
4342 if (!usable_slaves || !all_slaves) {
4343 ret = -ENOMEM;
4344 goto out;
4345 }
4346 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
4347 struct ad_info ad_info;
4348
4349 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
4350 pr_debug("bond_3ad_get_active_agg_info failed\n");
4351
4352
4353
4354 bond_reset_slave_arr(bond);
4355 goto out;
4356 }
4357 agg_id = ad_info.aggregator_id;
4358 }
4359 bond_for_each_slave(bond, slave, iter) {
4360 if (skipslave == slave)
4361 continue;
4362
4363 all_slaves->arr[all_slaves->count++] = slave;
4364 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
4365 struct aggregator *agg;
4366
4367 agg = SLAVE_AD_INFO(slave)->port.aggregator;
4368 if (!agg || agg->aggregator_identifier != agg_id)
4369 continue;
4370 }
4371 if (!bond_slave_can_tx(slave))
4372 continue;
4373
4374 slave_dbg(bond->dev, slave->dev, "Adding slave to tx hash array[%d]\n",
4375 usable_slaves->count);
4376
4377 usable_slaves->arr[usable_slaves->count++] = slave;
4378 }
4379
4380 bond_set_slave_arr(bond, usable_slaves, all_slaves);
4381 return ret;
4382out:
4383 if (ret != 0 && skipslave) {
4384 bond_skip_slave(rtnl_dereference(bond->all_slaves),
4385 skipslave);
4386 bond_skip_slave(rtnl_dereference(bond->usable_slaves),
4387 skipslave);
4388 }
4389 kfree_rcu(all_slaves, rcu);
4390 kfree_rcu(usable_slaves, rcu);
4391
4392 return ret;
4393}
4394
4395static struct slave *bond_xmit_3ad_xor_slave_get(struct bonding *bond,
4396 struct sk_buff *skb,
4397 struct bond_up_slave *slaves)
4398{
4399 struct slave *slave;
4400 unsigned int count;
4401 u32 hash;
4402
4403 hash = bond_xmit_hash(bond, skb);
4404 count = slaves ? READ_ONCE(slaves->count) : 0;
4405 if (unlikely(!count))
4406 return NULL;
4407
4408 slave = slaves->arr[hash % count];
4409 return slave;
4410}
4411
4412
4413
4414
4415
4416static netdev_tx_t bond_3ad_xor_xmit(struct sk_buff *skb,
4417 struct net_device *dev)
4418{
4419 struct bonding *bond = netdev_priv(dev);
4420 struct bond_up_slave *slaves;
4421 struct slave *slave;
4422
4423 slaves = rcu_dereference(bond->usable_slaves);
4424 slave = bond_xmit_3ad_xor_slave_get(bond, skb, slaves);
4425 if (likely(slave))
4426 return bond_dev_queue_xmit(bond, skb, slave->dev);
4427
4428 return bond_tx_drop(dev, skb);
4429}
4430
4431
4432static netdev_tx_t bond_xmit_broadcast(struct sk_buff *skb,
4433 struct net_device *bond_dev)
4434{
4435 struct bonding *bond = netdev_priv(bond_dev);
4436 struct slave *slave = NULL;
4437 struct list_head *iter;
4438
4439 bond_for_each_slave_rcu(bond, slave, iter) {
4440 if (bond_is_last_slave(bond, slave))
4441 break;
4442 if (bond_slave_is_up(slave) && slave->link == BOND_LINK_UP) {
4443 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4444
4445 if (!skb2) {
4446 net_err_ratelimited("%s: Error: %s: skb_clone() failed\n",
4447 bond_dev->name, __func__);
4448 continue;
4449 }
4450 bond_dev_queue_xmit(bond, skb2, slave->dev);
4451 }
4452 }
4453 if (slave && bond_slave_is_up(slave) && slave->link == BOND_LINK_UP)
4454 return bond_dev_queue_xmit(bond, skb, slave->dev);
4455
4456 return bond_tx_drop(bond_dev, skb);
4457}
4458
4459
4460
4461
4462static inline int bond_slave_override(struct bonding *bond,
4463 struct sk_buff *skb)
4464{
4465 struct slave *slave = NULL;
4466 struct list_head *iter;
4467
4468 if (!skb_rx_queue_recorded(skb))
4469 return 1;
4470
4471
4472 bond_for_each_slave_rcu(bond, slave, iter) {
4473 if (slave->queue_id == skb_get_queue_mapping(skb)) {
4474 if (bond_slave_is_up(slave) &&
4475 slave->link == BOND_LINK_UP) {
4476 bond_dev_queue_xmit(bond, skb, slave->dev);
4477 return 0;
4478 }
4479
4480 break;
4481 }
4482 }
4483
4484 return 1;
4485}
4486
4487
4488static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb,
4489 struct net_device *sb_dev)
4490{
4491
4492
4493
4494
4495
4496 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
4497
4498
4499 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb_get_queue_mapping(skb);
4500
4501 if (unlikely(txq >= dev->real_num_tx_queues)) {
4502 do {
4503 txq -= dev->real_num_tx_queues;
4504 } while (txq >= dev->real_num_tx_queues);
4505 }
4506 return txq;
4507}
4508
4509static struct net_device *bond_xmit_get_slave(struct net_device *master_dev,
4510 struct sk_buff *skb,
4511 bool all_slaves)
4512{
4513 struct bonding *bond = netdev_priv(master_dev);
4514 struct bond_up_slave *slaves;
4515 struct slave *slave = NULL;
4516
4517 switch (BOND_MODE(bond)) {
4518 case BOND_MODE_ROUNDROBIN:
4519 slave = bond_xmit_roundrobin_slave_get(bond, skb);
4520 break;
4521 case BOND_MODE_ACTIVEBACKUP:
4522 slave = bond_xmit_activebackup_slave_get(bond, skb);
4523 break;
4524 case BOND_MODE_8023AD:
4525 case BOND_MODE_XOR:
4526 if (all_slaves)
4527 slaves = rcu_dereference(bond->all_slaves);
4528 else
4529 slaves = rcu_dereference(bond->usable_slaves);
4530 slave = bond_xmit_3ad_xor_slave_get(bond, skb, slaves);
4531 break;
4532 case BOND_MODE_BROADCAST:
4533 break;
4534 case BOND_MODE_ALB:
4535 slave = bond_xmit_alb_slave_get(bond, skb);
4536 break;
4537 case BOND_MODE_TLB:
4538 slave = bond_xmit_tlb_slave_get(bond, skb);
4539 break;
4540 default:
4541
4542 WARN_ONCE(true, "Unknown bonding mode");
4543 break;
4544 }
4545
4546 if (slave)
4547 return slave->dev;
4548 return NULL;
4549}
4550
4551static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
4552{
4553 struct bonding *bond = netdev_priv(dev);
4554
4555 if (bond_should_override_tx_queue(bond) &&
4556 !bond_slave_override(bond, skb))
4557 return NETDEV_TX_OK;
4558
4559 switch (BOND_MODE(bond)) {
4560 case BOND_MODE_ROUNDROBIN:
4561 return bond_xmit_roundrobin(skb, dev);
4562 case BOND_MODE_ACTIVEBACKUP:
4563 return bond_xmit_activebackup(skb, dev);
4564 case BOND_MODE_8023AD:
4565 case BOND_MODE_XOR:
4566 return bond_3ad_xor_xmit(skb, dev);
4567 case BOND_MODE_BROADCAST:
4568 return bond_xmit_broadcast(skb, dev);
4569 case BOND_MODE_ALB:
4570 return bond_alb_xmit(skb, dev);
4571 case BOND_MODE_TLB:
4572 return bond_tlb_xmit(skb, dev);
4573 default:
4574
4575 netdev_err(dev, "Unknown bonding mode %d\n", BOND_MODE(bond));
4576 WARN_ON_ONCE(1);
4577 return bond_tx_drop(dev, skb);
4578 }
4579}
4580
4581static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
4582{
4583 struct bonding *bond = netdev_priv(dev);
4584 netdev_tx_t ret = NETDEV_TX_OK;
4585
4586
4587
4588
4589 if (unlikely(is_netpoll_tx_blocked(dev)))
4590 return NETDEV_TX_BUSY;
4591
4592 rcu_read_lock();
4593 if (bond_has_slaves(bond))
4594 ret = __bond_start_xmit(skb, dev);
4595 else
4596 ret = bond_tx_drop(dev, skb);
4597 rcu_read_unlock();
4598
4599 return ret;
4600}
4601
4602static u32 bond_mode_bcast_speed(struct slave *slave, u32 speed)
4603{
4604 if (speed == 0 || speed == SPEED_UNKNOWN)
4605 speed = slave->speed;
4606 else
4607 speed = min(speed, slave->speed);
4608
4609 return speed;
4610}
4611
4612static int bond_ethtool_get_link_ksettings(struct net_device *bond_dev,
4613 struct ethtool_link_ksettings *cmd)
4614{
4615 struct bonding *bond = netdev_priv(bond_dev);
4616 struct list_head *iter;
4617 struct slave *slave;
4618 u32 speed = 0;
4619
4620 cmd->base.duplex = DUPLEX_UNKNOWN;
4621 cmd->base.port = PORT_OTHER;
4622
4623
4624
4625
4626
4627
4628 bond_for_each_slave(bond, slave, iter) {
4629 if (bond_slave_can_tx(slave)) {
4630 if (slave->speed != SPEED_UNKNOWN) {
4631 if (BOND_MODE(bond) == BOND_MODE_BROADCAST)
4632 speed = bond_mode_bcast_speed(slave,
4633 speed);
4634 else
4635 speed += slave->speed;
4636 }
4637 if (cmd->base.duplex == DUPLEX_UNKNOWN &&
4638 slave->duplex != DUPLEX_UNKNOWN)
4639 cmd->base.duplex = slave->duplex;
4640 }
4641 }
4642 cmd->base.speed = speed ? : SPEED_UNKNOWN;
4643
4644 return 0;
4645}
4646
4647static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4648 struct ethtool_drvinfo *drvinfo)
4649{
4650 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
4651 snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), "%d",
4652 BOND_ABI_VERSION);
4653}
4654
4655static const struct ethtool_ops bond_ethtool_ops = {
4656 .get_drvinfo = bond_ethtool_get_drvinfo,
4657 .get_link = ethtool_op_get_link,
4658 .get_link_ksettings = bond_ethtool_get_link_ksettings,
4659};
4660
4661static const struct net_device_ops bond_netdev_ops = {
4662 .ndo_init = bond_init,
4663 .ndo_uninit = bond_uninit,
4664 .ndo_open = bond_open,
4665 .ndo_stop = bond_close,
4666 .ndo_start_xmit = bond_start_xmit,
4667 .ndo_select_queue = bond_select_queue,
4668 .ndo_get_stats64 = bond_get_stats,
4669 .ndo_do_ioctl = bond_do_ioctl,
4670 .ndo_change_rx_flags = bond_change_rx_flags,
4671 .ndo_set_rx_mode = bond_set_rx_mode,
4672 .ndo_change_mtu = bond_change_mtu,
4673 .ndo_set_mac_address = bond_set_mac_address,
4674 .ndo_neigh_setup = bond_neigh_setup,
4675 .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid,
4676 .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid,
4677#ifdef CONFIG_NET_POLL_CONTROLLER
4678 .ndo_netpoll_setup = bond_netpoll_setup,
4679 .ndo_netpoll_cleanup = bond_netpoll_cleanup,
4680 .ndo_poll_controller = bond_poll_controller,
4681#endif
4682 .ndo_add_slave = bond_enslave,
4683 .ndo_del_slave = bond_release,
4684 .ndo_fix_features = bond_fix_features,
4685 .ndo_features_check = passthru_features_check,
4686 .ndo_get_xmit_slave = bond_xmit_get_slave,
4687};
4688
4689static const struct device_type bond_type = {
4690 .name = "bond",
4691};
4692
4693static void bond_destructor(struct net_device *bond_dev)
4694{
4695 struct bonding *bond = netdev_priv(bond_dev);
4696 if (bond->wq)
4697 destroy_workqueue(bond->wq);
4698}
4699
4700void bond_setup(struct net_device *bond_dev)
4701{
4702 struct bonding *bond = netdev_priv(bond_dev);
4703
4704 spin_lock_init(&bond->mode_lock);
4705 bond->params = bonding_defaults;
4706
4707
4708 bond->dev = bond_dev;
4709
4710
4711 ether_setup(bond_dev);
4712 bond_dev->max_mtu = ETH_MAX_MTU;
4713 bond_dev->netdev_ops = &bond_netdev_ops;
4714 bond_dev->ethtool_ops = &bond_ethtool_ops;
4715
4716 bond_dev->needs_free_netdev = true;
4717 bond_dev->priv_destructor = bond_destructor;
4718
4719 SET_NETDEV_DEVTYPE(bond_dev, &bond_type);
4720
4721
4722 bond_dev->flags |= IFF_MASTER;
4723 bond_dev->priv_flags |= IFF_BONDING | IFF_UNICAST_FLT | IFF_NO_QUEUE;
4724 bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
4725
4726#ifdef CONFIG_XFRM_OFFLOAD
4727
4728 bond_dev->xfrmdev_ops = &bond_xfrmdev_ops;
4729 bond->xs = NULL;
4730#endif
4731
4732
4733 bond_dev->features |= NETIF_F_LLTX;
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743 bond_dev->features |= NETIF_F_NETNS_LOCAL;
4744
4745 bond_dev->hw_features = BOND_VLAN_FEATURES |
4746 NETIF_F_HW_VLAN_CTAG_RX |
4747 NETIF_F_HW_VLAN_CTAG_FILTER;
4748
4749 bond_dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
4750#ifdef CONFIG_XFRM_OFFLOAD
4751 bond_dev->hw_features |= BOND_XFRM_FEATURES;
4752#endif
4753 bond_dev->features |= bond_dev->hw_features;
4754 bond_dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
4755#ifdef CONFIG_XFRM_OFFLOAD
4756
4757 if (BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP)
4758 bond_dev->features &= ~BOND_XFRM_FEATURES;
4759#endif
4760}
4761
4762
4763
4764
4765static void bond_uninit(struct net_device *bond_dev)
4766{
4767 struct bonding *bond = netdev_priv(bond_dev);
4768 struct bond_up_slave *usable, *all;
4769 struct list_head *iter;
4770 struct slave *slave;
4771
4772 bond_netpoll_cleanup(bond_dev);
4773
4774
4775 bond_for_each_slave(bond, slave, iter)
4776 __bond_release_one(bond_dev, slave->dev, true, true);
4777 netdev_info(bond_dev, "Released all slaves\n");
4778
4779 usable = rtnl_dereference(bond->usable_slaves);
4780 if (usable) {
4781 RCU_INIT_POINTER(bond->usable_slaves, NULL);
4782 kfree_rcu(usable, rcu);
4783 }
4784
4785 all = rtnl_dereference(bond->all_slaves);
4786 if (all) {
4787 RCU_INIT_POINTER(bond->all_slaves, NULL);
4788 kfree_rcu(all, rcu);
4789 }
4790
4791 list_del(&bond->bond_list);
4792
4793 bond_debug_unregister(bond);
4794}
4795
4796
4797
4798static int bond_check_params(struct bond_params *params)
4799{
4800 int arp_validate_value, fail_over_mac_value, primary_reselect_value, i;
4801 struct bond_opt_value newval;
4802 const struct bond_opt_value *valptr;
4803 int arp_all_targets_value = 0;
4804 u16 ad_actor_sys_prio = 0;
4805 u16 ad_user_port_key = 0;
4806 __be32 arp_target[BOND_MAX_ARP_TARGETS] = { 0 };
4807 int arp_ip_count;
4808 int bond_mode = BOND_MODE_ROUNDROBIN;
4809 int xmit_hashtype = BOND_XMIT_POLICY_LAYER2;
4810 int lacp_fast = 0;
4811 int tlb_dynamic_lb;
4812
4813
4814 if (mode) {
4815 bond_opt_initstr(&newval, mode);
4816 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_MODE), &newval);
4817 if (!valptr) {
4818 pr_err("Error: Invalid bonding mode \"%s\"\n", mode);
4819 return -EINVAL;
4820 }
4821 bond_mode = valptr->value;
4822 }
4823
4824 if (xmit_hash_policy) {
4825 if (bond_mode == BOND_MODE_ROUNDROBIN ||
4826 bond_mode == BOND_MODE_ACTIVEBACKUP ||
4827 bond_mode == BOND_MODE_BROADCAST) {
4828 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
4829 bond_mode_name(bond_mode));
4830 } else {
4831 bond_opt_initstr(&newval, xmit_hash_policy);
4832 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_XMIT_HASH),
4833 &newval);
4834 if (!valptr) {
4835 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4836 xmit_hash_policy);
4837 return -EINVAL;
4838 }
4839 xmit_hashtype = valptr->value;
4840 }
4841 }
4842
4843 if (lacp_rate) {
4844 if (bond_mode != BOND_MODE_8023AD) {
4845 pr_info("lacp_rate param is irrelevant in mode %s\n",
4846 bond_mode_name(bond_mode));
4847 } else {
4848 bond_opt_initstr(&newval, lacp_rate);
4849 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_LACP_RATE),
4850 &newval);
4851 if (!valptr) {
4852 pr_err("Error: Invalid lacp rate \"%s\"\n",
4853 lacp_rate);
4854 return -EINVAL;
4855 }
4856 lacp_fast = valptr->value;
4857 }
4858 }
4859
4860 if (ad_select) {
4861 bond_opt_initstr(&newval, ad_select);
4862 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_AD_SELECT),
4863 &newval);
4864 if (!valptr) {
4865 pr_err("Error: Invalid ad_select \"%s\"\n", ad_select);
4866 return -EINVAL;
4867 }
4868 params->ad_select = valptr->value;
4869 if (bond_mode != BOND_MODE_8023AD)
4870 pr_warn("ad_select param only affects 802.3ad mode\n");
4871 } else {
4872 params->ad_select = BOND_AD_STABLE;
4873 }
4874
4875 if (max_bonds < 0) {
4876 pr_warn("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4877 max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
4878 max_bonds = BOND_DEFAULT_MAX_BONDS;
4879 }
4880
4881 if (miimon < 0) {
4882 pr_warn("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4883 miimon, INT_MAX);
4884 miimon = 0;
4885 }
4886
4887 if (updelay < 0) {
4888 pr_warn("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4889 updelay, INT_MAX);
4890 updelay = 0;
4891 }
4892
4893 if (downdelay < 0) {
4894 pr_warn("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4895 downdelay, INT_MAX);
4896 downdelay = 0;
4897 }
4898
4899 if ((use_carrier != 0) && (use_carrier != 1)) {
4900 pr_warn("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4901 use_carrier);
4902 use_carrier = 1;
4903 }
4904
4905 if (num_peer_notif < 0 || num_peer_notif > 255) {
4906 pr_warn("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4907 num_peer_notif);
4908 num_peer_notif = 1;
4909 }
4910
4911
4912 if (!bond_mode_uses_arp(bond_mode)) {
4913 if (!miimon) {
4914 pr_warn("Warning: miimon must be specified, otherwise bonding will not detect link failure, speed and duplex which are essential for 802.3ad operation\n");
4915 pr_warn("Forcing miimon to 100msec\n");
4916 miimon = BOND_DEFAULT_MIIMON;
4917 }
4918 }
4919
4920 if (tx_queues < 1 || tx_queues > 255) {
4921 pr_warn("Warning: tx_queues (%d) should be between 1 and 255, resetting to %d\n",
4922 tx_queues, BOND_DEFAULT_TX_QUEUES);
4923 tx_queues = BOND_DEFAULT_TX_QUEUES;
4924 }
4925
4926 if ((all_slaves_active != 0) && (all_slaves_active != 1)) {
4927 pr_warn("Warning: all_slaves_active module parameter (%d), not of valid value (0/1), so it was set to 0\n",
4928 all_slaves_active);
4929 all_slaves_active = 0;
4930 }
4931
4932 if (resend_igmp < 0 || resend_igmp > 255) {
4933 pr_warn("Warning: resend_igmp (%d) should be between 0 and 255, resetting to %d\n",
4934 resend_igmp, BOND_DEFAULT_RESEND_IGMP);
4935 resend_igmp = BOND_DEFAULT_RESEND_IGMP;
4936 }
4937
4938 bond_opt_initval(&newval, packets_per_slave);
4939 if (!bond_opt_parse(bond_opt_get(BOND_OPT_PACKETS_PER_SLAVE), &newval)) {
4940 pr_warn("Warning: packets_per_slave (%d) should be between 0 and %u resetting to 1\n",
4941 packets_per_slave, USHRT_MAX);
4942 packets_per_slave = 1;
4943 }
4944
4945 if (bond_mode == BOND_MODE_ALB) {
4946 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",
4947 updelay);
4948 }
4949
4950 if (!miimon) {
4951 if (updelay || downdelay) {
4952
4953
4954
4955 pr_warn("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",
4956 updelay, downdelay);
4957 }
4958 } else {
4959
4960 if (arp_interval) {
4961 pr_warn("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4962 miimon, arp_interval);
4963 arp_interval = 0;
4964 }
4965
4966 if ((updelay % miimon) != 0) {
4967 pr_warn("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4968 updelay, miimon, (updelay / miimon) * miimon);
4969 }
4970
4971 updelay /= miimon;
4972
4973 if ((downdelay % miimon) != 0) {
4974 pr_warn("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4975 downdelay, miimon,
4976 (downdelay / miimon) * miimon);
4977 }
4978
4979 downdelay /= miimon;
4980 }
4981
4982 if (arp_interval < 0) {
4983 pr_warn("Warning: arp_interval module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4984 arp_interval, INT_MAX);
4985 arp_interval = 0;
4986 }
4987
4988 for (arp_ip_count = 0, i = 0;
4989 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[i]; i++) {
4990 __be32 ip;
4991
4992
4993 if (!in4_pton(arp_ip_target[i], -1, (u8 *)&ip, -1, NULL) ||
4994 !bond_is_ip_target_ok(ip)) {
4995 pr_warn("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
4996 arp_ip_target[i]);
4997 arp_interval = 0;
4998 } else {
4999 if (bond_get_targets_ip(arp_target, ip) == -1)
5000 arp_target[arp_ip_count++] = ip;
5001 else
5002 pr_warn("Warning: duplicate address %pI4 in arp_ip_target, skipping\n",
5003 &ip);
5004 }
5005 }
5006
5007 if (arp_interval && !arp_ip_count) {
5008
5009 pr_warn("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
5010 arp_interval);
5011 arp_interval = 0;
5012 }
5013
5014 if (arp_validate) {
5015 if (!arp_interval) {
5016 pr_err("arp_validate requires arp_interval\n");
5017 return -EINVAL;
5018 }
5019
5020 bond_opt_initstr(&newval, arp_validate);
5021 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_ARP_VALIDATE),
5022 &newval);
5023 if (!valptr) {
5024 pr_err("Error: invalid arp_validate \"%s\"\n",
5025 arp_validate);
5026 return -EINVAL;
5027 }
5028 arp_validate_value = valptr->value;
5029 } else {
5030 arp_validate_value = 0;
5031 }
5032
5033 if (arp_all_targets) {
5034 bond_opt_initstr(&newval, arp_all_targets);
5035 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_ARP_ALL_TARGETS),
5036 &newval);
5037 if (!valptr) {
5038 pr_err("Error: invalid arp_all_targets_value \"%s\"\n",
5039 arp_all_targets);
5040 arp_all_targets_value = 0;
5041 } else {
5042 arp_all_targets_value = valptr->value;
5043 }
5044 }
5045
5046 if (miimon) {
5047 pr_info("MII link monitoring set to %d ms\n", miimon);
5048 } else if (arp_interval) {
5049 valptr = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
5050 arp_validate_value);
5051 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
5052 arp_interval, valptr->string, arp_ip_count);
5053
5054 for (i = 0; i < arp_ip_count; i++)
5055 pr_cont(" %s", arp_ip_target[i]);
5056
5057 pr_cont("\n");
5058
5059 } else if (max_bonds) {
5060
5061
5062
5063 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");
5064 }
5065
5066 if (primary && !bond_mode_uses_primary(bond_mode)) {
5067
5068
5069
5070 pr_warn("Warning: %s primary device specified but has no effect in %s mode\n",
5071 primary, bond_mode_name(bond_mode));
5072 primary = NULL;
5073 }
5074
5075 if (primary && primary_reselect) {
5076 bond_opt_initstr(&newval, primary_reselect);
5077 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_PRIMARY_RESELECT),
5078 &newval);
5079 if (!valptr) {
5080 pr_err("Error: Invalid primary_reselect \"%s\"\n",
5081 primary_reselect);
5082 return -EINVAL;
5083 }
5084 primary_reselect_value = valptr->value;
5085 } else {
5086 primary_reselect_value = BOND_PRI_RESELECT_ALWAYS;
5087 }
5088
5089 if (fail_over_mac) {
5090 bond_opt_initstr(&newval, fail_over_mac);
5091 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_FAIL_OVER_MAC),
5092 &newval);
5093 if (!valptr) {
5094 pr_err("Error: invalid fail_over_mac \"%s\"\n",
5095 fail_over_mac);
5096 return -EINVAL;
5097 }
5098 fail_over_mac_value = valptr->value;
5099 if (bond_mode != BOND_MODE_ACTIVEBACKUP)
5100 pr_warn("Warning: fail_over_mac only affects active-backup mode\n");
5101 } else {
5102 fail_over_mac_value = BOND_FOM_NONE;
5103 }
5104
5105 bond_opt_initstr(&newval, "default");
5106 valptr = bond_opt_parse(
5107 bond_opt_get(BOND_OPT_AD_ACTOR_SYS_PRIO),
5108 &newval);
5109 if (!valptr) {
5110 pr_err("Error: No ad_actor_sys_prio default value");
5111 return -EINVAL;
5112 }
5113 ad_actor_sys_prio = valptr->value;
5114
5115 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_AD_USER_PORT_KEY),
5116 &newval);
5117 if (!valptr) {
5118 pr_err("Error: No ad_user_port_key default value");
5119 return -EINVAL;
5120 }
5121 ad_user_port_key = valptr->value;
5122
5123 bond_opt_initstr(&newval, "default");
5124 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_TLB_DYNAMIC_LB), &newval);
5125 if (!valptr) {
5126 pr_err("Error: No tlb_dynamic_lb default value");
5127 return -EINVAL;
5128 }
5129 tlb_dynamic_lb = valptr->value;
5130
5131 if (lp_interval == 0) {
5132 pr_warn("Warning: ip_interval must be between 1 and %d, so it was reset to %d\n",
5133 INT_MAX, BOND_ALB_DEFAULT_LP_INTERVAL);
5134 lp_interval = BOND_ALB_DEFAULT_LP_INTERVAL;
5135 }
5136
5137
5138 params->mode = bond_mode;
5139 params->xmit_policy = xmit_hashtype;
5140 params->miimon = miimon;
5141 params->num_peer_notif = num_peer_notif;
5142 params->arp_interval = arp_interval;
5143 params->arp_validate = arp_validate_value;
5144 params->arp_all_targets = arp_all_targets_value;
5145 params->updelay = updelay;
5146 params->downdelay = downdelay;
5147 params->peer_notif_delay = 0;
5148 params->use_carrier = use_carrier;
5149 params->lacp_fast = lacp_fast;
5150 params->primary[0] = 0;
5151 params->primary_reselect = primary_reselect_value;
5152 params->fail_over_mac = fail_over_mac_value;
5153 params->tx_queues = tx_queues;
5154 params->all_slaves_active = all_slaves_active;
5155 params->resend_igmp = resend_igmp;
5156 params->min_links = min_links;
5157 params->lp_interval = lp_interval;
5158 params->packets_per_slave = packets_per_slave;
5159 params->tlb_dynamic_lb = tlb_dynamic_lb;
5160 params->ad_actor_sys_prio = ad_actor_sys_prio;
5161 eth_zero_addr(params->ad_actor_system);
5162 params->ad_user_port_key = ad_user_port_key;
5163 if (packets_per_slave > 0) {
5164 params->reciprocal_packets_per_slave =
5165 reciprocal_value(packets_per_slave);
5166 } else {
5167
5168
5169
5170 params->reciprocal_packets_per_slave =
5171 (struct reciprocal_value) { 0 };
5172 }
5173
5174 if (primary) {
5175 strncpy(params->primary, primary, IFNAMSIZ);
5176 params->primary[IFNAMSIZ - 1] = 0;
5177 }
5178
5179 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
5180
5181 return 0;
5182}
5183
5184
5185static int bond_init(struct net_device *bond_dev)
5186{
5187 struct bonding *bond = netdev_priv(bond_dev);
5188 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
5189
5190 netdev_dbg(bond_dev, "Begin bond_init\n");
5191
5192 bond->wq = alloc_ordered_workqueue(bond_dev->name, WQ_MEM_RECLAIM);
5193 if (!bond->wq)
5194 return -ENOMEM;
5195
5196 spin_lock_init(&bond->stats_lock);
5197 netdev_lockdep_set_classes(bond_dev);
5198
5199 list_add_tail(&bond->bond_list, &bn->dev_list);
5200
5201 bond_prepare_sysfs_group(bond);
5202
5203 bond_debug_register(bond);
5204
5205
5206 if (is_zero_ether_addr(bond_dev->dev_addr) &&
5207 bond_dev->addr_assign_type == NET_ADDR_PERM)
5208 eth_hw_addr_random(bond_dev);