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15#ifndef _NET_BONDING_H
16#define _NET_BONDING_H
17
18#include <linux/timer.h>
19#include <linux/proc_fs.h>
20#include <linux/if_bonding.h>
21#include <linux/cpumask.h>
22#include <linux/in6.h>
23#include <linux/netpoll.h>
24#include <linux/inetdevice.h>
25#include <linux/etherdevice.h>
26#include <linux/reciprocal_div.h>
27#include <linux/if_link.h>
28
29#include <net/bond_3ad.h>
30#include <net/bond_alb.h>
31#include <net/bond_options.h>
32#include <net/ipv6.h>
33#include <net/addrconf.h>
34
35#define BOND_MAX_ARP_TARGETS 16
36#define BOND_MAX_NS_TARGETS BOND_MAX_ARP_TARGETS
37
38#define BOND_DEFAULT_MIIMON 100
39
40#ifndef __long_aligned
41#define __long_aligned __attribute__((aligned((sizeof(long)))))
42#endif
43
44#define slave_info(bond_dev, slave_dev, fmt, ...) \
45 netdev_info(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
46#define slave_warn(bond_dev, slave_dev, fmt, ...) \
47 netdev_warn(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
48#define slave_dbg(bond_dev, slave_dev, fmt, ...) \
49 netdev_dbg(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
50#define slave_err(bond_dev, slave_dev, fmt, ...) \
51 netdev_err(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
52
53#define BOND_MODE(bond) ((bond)->params.mode)
54
55
56#define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)
57
58#define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))
59
60
61#define bond_first_slave(bond) \
62 (bond_has_slaves(bond) ? \
63 netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
64 NULL)
65#define bond_last_slave(bond) \
66 (bond_has_slaves(bond) ? \
67 netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
68 NULL)
69
70
71#define bond_first_slave_rcu(bond) \
72 netdev_lower_get_first_private_rcu(bond->dev)
73
74#define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
75#define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
76
77
78
79
80
81
82
83
84
85#define bond_for_each_slave(bond, pos, iter) \
86 netdev_for_each_lower_private((bond)->dev, pos, iter)
87
88
89#define bond_for_each_slave_rcu(bond, pos, iter) \
90 netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
91
92#define BOND_XFRM_FEATURES (NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM | \
93 NETIF_F_GSO_ESP)
94
95#define BOND_TLS_FEATURES (NETIF_F_HW_TLS_TX | NETIF_F_HW_TLS_RX)
96
97#ifdef CONFIG_NET_POLL_CONTROLLER
98extern atomic_t netpoll_block_tx;
99
100static inline void block_netpoll_tx(void)
101{
102 atomic_inc(&netpoll_block_tx);
103}
104
105static inline void unblock_netpoll_tx(void)
106{
107 atomic_dec(&netpoll_block_tx);
108}
109
110static inline int is_netpoll_tx_blocked(struct net_device *dev)
111{
112 if (unlikely(netpoll_tx_running(dev)))
113 return atomic_read(&netpoll_block_tx);
114 return 0;
115}
116#else
117#define block_netpoll_tx()
118#define unblock_netpoll_tx()
119#define is_netpoll_tx_blocked(dev) (0)
120#endif
121
122struct bond_params {
123 int mode;
124 int xmit_policy;
125 int miimon;
126 u8 num_peer_notif;
127 u8 missed_max;
128 int arp_interval;
129 int arp_validate;
130 int arp_all_targets;
131 int use_carrier;
132 int fail_over_mac;
133 int updelay;
134 int downdelay;
135 int peer_notif_delay;
136 int lacp_active;
137 int lacp_fast;
138 unsigned int min_links;
139 int ad_select;
140 char primary[IFNAMSIZ];
141 int primary_reselect;
142 __be32 arp_targets[BOND_MAX_ARP_TARGETS];
143 int tx_queues;
144 int all_slaves_active;
145 int resend_igmp;
146 int lp_interval;
147 int packets_per_slave;
148 int tlb_dynamic_lb;
149 struct reciprocal_value reciprocal_packets_per_slave;
150 u16 ad_actor_sys_prio;
151 u16 ad_user_port_key;
152 struct in6_addr ns_targets[BOND_MAX_NS_TARGETS];
153
154
155 u8 ad_actor_system[ETH_ALEN + 2];
156};
157
158struct slave {
159 struct net_device *dev;
160 struct bonding *bond;
161 int delay;
162
163 unsigned long last_link_up;
164 unsigned long last_rx;
165 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
166 s8 link;
167 s8 link_new_state;
168 u8 backup:1,
169
170 inactive:1,
171 should_notify:1,
172 should_notify_link:1;
173 u8 duplex;
174 u32 original_mtu;
175 u32 link_failure_count;
176 u32 speed;
177 u16 queue_id;
178 u8 perm_hwaddr[MAX_ADDR_LEN];
179 struct ad_slave_info *ad_info;
180 struct tlb_slave_info tlb_info;
181#ifdef CONFIG_NET_POLL_CONTROLLER
182 struct netpoll *np;
183#endif
184 struct delayed_work notify_work;
185 struct kobject kobj;
186 struct rtnl_link_stats64 slave_stats;
187};
188
189static inline struct slave *to_slave(struct kobject *kobj)
190{
191 return container_of(kobj, struct slave, kobj);
192}
193
194struct bond_up_slave {
195 unsigned int count;
196 struct rcu_head rcu;
197 struct slave *arr[];
198};
199
200
201
202
203#define BOND_LINK_NOCHANGE -1
204
205struct bond_ipsec {
206 struct list_head list;
207 struct xfrm_state *xs;
208};
209
210
211
212
213
214struct bonding {
215 struct net_device *dev;
216 struct slave __rcu *curr_active_slave;
217 struct slave __rcu *current_arp_slave;
218 struct slave __rcu *primary_slave;
219 struct bond_up_slave __rcu *usable_slaves;
220 struct bond_up_slave __rcu *all_slaves;
221 bool force_primary;
222 s32 slave_cnt;
223 int (*recv_probe)(const struct sk_buff *, struct bonding *,
224 struct slave *);
225
226
227
228
229
230
231
232 spinlock_t mode_lock;
233 spinlock_t stats_lock;
234 u8 send_peer_notif;
235 u8 igmp_retrans;
236#ifdef CONFIG_PROC_FS
237 struct proc_dir_entry *proc_entry;
238 char proc_file_name[IFNAMSIZ];
239#endif
240 struct list_head bond_list;
241 u32 __percpu *rr_tx_counter;
242 struct ad_bond_info ad_info;
243 struct alb_bond_info alb_info;
244 struct bond_params params;
245 struct workqueue_struct *wq;
246 struct delayed_work mii_work;
247 struct delayed_work arp_work;
248 struct delayed_work alb_work;
249 struct delayed_work ad_work;
250 struct delayed_work mcast_work;
251 struct delayed_work slave_arr_work;
252#ifdef CONFIG_DEBUG_FS
253
254 struct dentry *debug_dir;
255#endif
256 struct rtnl_link_stats64 bond_stats;
257#ifdef CONFIG_XFRM_OFFLOAD
258 struct list_head ipsec_list;
259
260 spinlock_t ipsec_lock;
261#endif
262 struct bpf_prog *xdp_prog;
263};
264
265#define bond_slave_get_rcu(dev) \
266 ((struct slave *) rcu_dereference(dev->rx_handler_data))
267
268#define bond_slave_get_rtnl(dev) \
269 ((struct slave *) rtnl_dereference(dev->rx_handler_data))
270
271void bond_queue_slave_event(struct slave *slave);
272void bond_lower_state_changed(struct slave *slave);
273
274struct bond_vlan_tag {
275 __be16 vlan_proto;
276 unsigned short vlan_id;
277};
278
279bool bond_sk_check(struct bonding *bond);
280
281
282
283
284
285
286static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
287 struct net_device *slave_dev)
288{
289 return netdev_lower_dev_get_private(bond->dev, slave_dev);
290}
291
292static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
293{
294 return slave->bond;
295}
296
297static inline bool bond_should_override_tx_queue(struct bonding *bond)
298{
299 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
300 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
301}
302
303static inline bool bond_is_lb(const struct bonding *bond)
304{
305 return BOND_MODE(bond) == BOND_MODE_TLB ||
306 BOND_MODE(bond) == BOND_MODE_ALB;
307}
308
309static inline bool bond_needs_speed_duplex(const struct bonding *bond)
310{
311 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
312}
313
314static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
315{
316 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
317}
318
319static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
320{
321 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
322 BOND_MODE(bond) == BOND_MODE_XOR ||
323 BOND_MODE(bond) == BOND_MODE_TLB ||
324 BOND_MODE(bond) == BOND_MODE_ALB);
325}
326
327static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
328{
329 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
330 BOND_MODE(bond) == BOND_MODE_XOR ||
331 bond_is_nondyn_tlb(bond));
332}
333
334static inline bool bond_mode_uses_arp(int mode)
335{
336 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
337 mode != BOND_MODE_ALB;
338}
339
340static inline bool bond_mode_uses_primary(int mode)
341{
342 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
343 mode == BOND_MODE_ALB;
344}
345
346static inline bool bond_uses_primary(struct bonding *bond)
347{
348 return bond_mode_uses_primary(BOND_MODE(bond));
349}
350
351static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
352{
353 struct slave *slave = rcu_dereference_rtnl(bond->curr_active_slave);
354
355 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
356}
357
358static inline bool bond_slave_is_up(struct slave *slave)
359{
360 return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
361}
362
363static inline void bond_set_active_slave(struct slave *slave)
364{
365 if (slave->backup) {
366 slave->backup = 0;
367 bond_queue_slave_event(slave);
368 bond_lower_state_changed(slave);
369 }
370}
371
372static inline void bond_set_backup_slave(struct slave *slave)
373{
374 if (!slave->backup) {
375 slave->backup = 1;
376 bond_queue_slave_event(slave);
377 bond_lower_state_changed(slave);
378 }
379}
380
381static inline void bond_set_slave_state(struct slave *slave,
382 int slave_state, bool notify)
383{
384 if (slave->backup == slave_state)
385 return;
386
387 slave->backup = slave_state;
388 if (notify) {
389 bond_lower_state_changed(slave);
390 bond_queue_slave_event(slave);
391 slave->should_notify = 0;
392 } else {
393 if (slave->should_notify)
394 slave->should_notify = 0;
395 else
396 slave->should_notify = 1;
397 }
398}
399
400static inline void bond_slave_state_change(struct bonding *bond)
401{
402 struct list_head *iter;
403 struct slave *tmp;
404
405 bond_for_each_slave(bond, tmp, iter) {
406 if (tmp->link == BOND_LINK_UP)
407 bond_set_active_slave(tmp);
408 else if (tmp->link == BOND_LINK_DOWN)
409 bond_set_backup_slave(tmp);
410 }
411}
412
413static inline void bond_slave_state_notify(struct bonding *bond)
414{
415 struct list_head *iter;
416 struct slave *tmp;
417
418 bond_for_each_slave(bond, tmp, iter) {
419 if (tmp->should_notify) {
420 bond_lower_state_changed(tmp);
421 tmp->should_notify = 0;
422 }
423 }
424}
425
426static inline int bond_slave_state(struct slave *slave)
427{
428 return slave->backup;
429}
430
431static inline bool bond_is_active_slave(struct slave *slave)
432{
433 return !bond_slave_state(slave);
434}
435
436static inline bool bond_slave_can_tx(struct slave *slave)
437{
438 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
439 bond_is_active_slave(slave);
440}
441
442static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
443{
444 struct slave *slave;
445 bool active;
446
447 rcu_read_lock();
448 slave = bond_slave_get_rcu(slave_dev);
449 active = bond_is_active_slave(slave);
450 rcu_read_unlock();
451
452 return active;
453}
454
455static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
456{
457 if (len == ETH_ALEN) {
458 ether_addr_copy(dst, src);
459 return;
460 }
461
462 memcpy(dst, src, len);
463}
464
465#define BOND_PRI_RESELECT_ALWAYS 0
466#define BOND_PRI_RESELECT_BETTER 1
467#define BOND_PRI_RESELECT_FAILURE 2
468
469#define BOND_FOM_NONE 0
470#define BOND_FOM_ACTIVE 1
471#define BOND_FOM_FOLLOW 2
472
473#define BOND_ARP_TARGETS_ANY 0
474#define BOND_ARP_TARGETS_ALL 1
475
476#define BOND_ARP_VALIDATE_NONE 0
477#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
478#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
479#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
480 BOND_ARP_VALIDATE_BACKUP)
481#define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1)
482#define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \
483 BOND_ARP_FILTER)
484#define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \
485 BOND_ARP_FILTER)
486
487#define BOND_SLAVE_NOTIFY_NOW true
488#define BOND_SLAVE_NOTIFY_LATER false
489
490static inline int slave_do_arp_validate(struct bonding *bond,
491 struct slave *slave)
492{
493 return bond->params.arp_validate & (1 << bond_slave_state(slave));
494}
495
496static inline int slave_do_arp_validate_only(struct bonding *bond)
497{
498 return bond->params.arp_validate & BOND_ARP_FILTER;
499}
500
501static inline int bond_is_ip_target_ok(__be32 addr)
502{
503 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
504}
505
506static inline int bond_is_ip6_target_ok(struct in6_addr *addr)
507{
508 return !ipv6_addr_any(addr) &&
509 !ipv6_addr_loopback(addr) &&
510 !ipv6_addr_is_multicast(addr);
511}
512
513
514
515
516static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
517 struct slave *slave)
518{
519 int i = 1;
520 unsigned long ret = slave->target_last_arp_rx[0];
521
522 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
523 if (time_before(slave->target_last_arp_rx[i], ret))
524 ret = slave->target_last_arp_rx[i];
525
526 return ret;
527}
528
529static inline unsigned long slave_last_rx(struct bonding *bond,
530 struct slave *slave)
531{
532 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
533 return slave_oldest_target_arp_rx(bond, slave);
534
535 return slave->last_rx;
536}
537
538#ifdef CONFIG_NET_POLL_CONTROLLER
539static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
540 struct sk_buff *skb)
541{
542 return netpoll_send_skb(slave->np, skb);
543}
544#else
545static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
546 struct sk_buff *skb)
547{
548 BUG();
549 return NETDEV_TX_OK;
550}
551#endif
552
553static inline void bond_set_slave_inactive_flags(struct slave *slave,
554 bool notify)
555{
556 if (!bond_is_lb(slave->bond))
557 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
558 if (!slave->bond->params.all_slaves_active)
559 slave->inactive = 1;
560}
561
562static inline void bond_set_slave_active_flags(struct slave *slave,
563 bool notify)
564{
565 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
566 slave->inactive = 0;
567}
568
569static inline bool bond_is_slave_inactive(struct slave *slave)
570{
571 return slave->inactive;
572}
573
574static inline void bond_propose_link_state(struct slave *slave, int state)
575{
576 slave->link_new_state = state;
577}
578
579static inline void bond_commit_link_state(struct slave *slave, bool notify)
580{
581 if (slave->link_new_state == BOND_LINK_NOCHANGE)
582 return;
583
584 slave->link = slave->link_new_state;
585 if (notify) {
586 bond_queue_slave_event(slave);
587 bond_lower_state_changed(slave);
588 slave->should_notify_link = 0;
589 } else {
590 if (slave->should_notify_link)
591 slave->should_notify_link = 0;
592 else
593 slave->should_notify_link = 1;
594 }
595}
596
597static inline void bond_set_slave_link_state(struct slave *slave, int state,
598 bool notify)
599{
600 bond_propose_link_state(slave, state);
601 bond_commit_link_state(slave, notify);
602}
603
604static inline void bond_slave_link_notify(struct bonding *bond)
605{
606 struct list_head *iter;
607 struct slave *tmp;
608
609 bond_for_each_slave(bond, tmp, iter) {
610 if (tmp->should_notify_link) {
611 bond_queue_slave_event(tmp);
612 bond_lower_state_changed(tmp);
613 tmp->should_notify_link = 0;
614 }
615 }
616}
617
618static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
619{
620 struct in_device *in_dev;
621 __be32 addr = 0;
622
623 rcu_read_lock();
624 in_dev = __in_dev_get_rcu(dev);
625
626 if (in_dev)
627 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
628 RT_SCOPE_HOST);
629 rcu_read_unlock();
630 return addr;
631}
632
633struct bond_net {
634 struct net *net;
635 struct list_head dev_list;
636#ifdef CONFIG_PROC_FS
637 struct proc_dir_entry *proc_dir;
638#endif
639 struct class_attribute class_attr_bonding_masters;
640};
641
642int bond_rcv_validate(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
643netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
644int bond_create(struct net *net, const char *name);
645int bond_create_sysfs(struct bond_net *net);
646void bond_destroy_sysfs(struct bond_net *net);
647void bond_prepare_sysfs_group(struct bonding *bond);
648int bond_sysfs_slave_add(struct slave *slave);
649void bond_sysfs_slave_del(struct slave *slave);
650int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
651 struct netlink_ext_ack *extack);
652int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
653u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
654int bond_set_carrier(struct bonding *bond);
655void bond_select_active_slave(struct bonding *bond);
656void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
657void bond_create_debugfs(void);
658void bond_destroy_debugfs(void);
659void bond_debug_register(struct bonding *bond);
660void bond_debug_unregister(struct bonding *bond);
661void bond_debug_reregister(struct bonding *bond);
662const char *bond_mode_name(int mode);
663void bond_setup(struct net_device *bond_dev);
664unsigned int bond_get_num_tx_queues(void);
665int bond_netlink_init(void);
666void bond_netlink_fini(void);
667struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
668const char *bond_slave_link_status(s8 link);
669struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
670 struct net_device *end_dev,
671 int level);
672int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
673void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
674void bond_work_init_all(struct bonding *bond);
675
676#ifdef CONFIG_PROC_FS
677void bond_create_proc_entry(struct bonding *bond);
678void bond_remove_proc_entry(struct bonding *bond);
679void bond_create_proc_dir(struct bond_net *bn);
680void bond_destroy_proc_dir(struct bond_net *bn);
681#else
682static inline void bond_create_proc_entry(struct bonding *bond)
683{
684}
685
686static inline void bond_remove_proc_entry(struct bonding *bond)
687{
688}
689
690static inline void bond_create_proc_dir(struct bond_net *bn)
691{
692}
693
694static inline void bond_destroy_proc_dir(struct bond_net *bn)
695{
696}
697#endif
698
699static inline struct slave *bond_slave_has_mac(struct bonding *bond,
700 const u8 *mac)
701{
702 struct list_head *iter;
703 struct slave *tmp;
704
705 bond_for_each_slave(bond, tmp, iter)
706 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
707 return tmp;
708
709 return NULL;
710}
711
712
713static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
714{
715 struct list_head *iter;
716 struct slave *tmp;
717 struct netdev_hw_addr *ha;
718
719 bond_for_each_slave_rcu(bond, tmp, iter)
720 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
721 return true;
722
723 if (netdev_uc_empty(bond->dev))
724 return false;
725
726 netdev_for_each_uc_addr(ha, bond->dev)
727 if (ether_addr_equal_64bits(mac, ha->addr))
728 return true;
729
730 return false;
731}
732
733
734
735
736static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
737{
738 int i;
739
740 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
741 if (targets[i] == ip)
742 return i;
743 else if (targets[i] == 0)
744 break;
745
746 return -1;
747}
748
749static inline int bond_get_targets_ip6(struct in6_addr *targets, struct in6_addr *ip)
750{
751 int i;
752
753 for (i = 0; i < BOND_MAX_NS_TARGETS; i++)
754 if (ipv6_addr_equal(&targets[i], ip))
755 return i;
756 else if (ipv6_addr_any(&targets[i]))
757 break;
758
759 return -1;
760}
761
762
763extern unsigned int bond_net_id;
764
765
766extern struct rtnl_link_ops bond_link_ops;
767
768
769extern const struct sysfs_ops slave_sysfs_ops;
770
771static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
772{
773 dev_core_stats_tx_dropped_inc(dev);
774 dev_kfree_skb_any(skb);
775 return NET_XMIT_DROP;
776}
777
778#endif
779
