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25#ifndef _LINUX_NETDEVICE_H
26#define _LINUX_NETDEVICE_H
27
28#include <linux/timer.h>
29#include <linux/bug.h>
30#include <linux/delay.h>
31#include <linux/atomic.h>
32#include <linux/prefetch.h>
33#include <asm/cache.h>
34#include <asm/byteorder.h>
35
36#include <linux/percpu.h>
37#include <linux/rculist.h>
38#include <linux/dmaengine.h>
39#include <linux/workqueue.h>
40#include <linux/dynamic_queue_limits.h>
41
42#include <linux/ethtool.h>
43#include <net/net_namespace.h>
44#include <net/dsa.h>
45#ifdef CONFIG_DCB
46#include <net/dcbnl.h>
47#endif
48#include <net/netprio_cgroup.h>
49
50#include <linux/netdev_features.h>
51#include <linux/neighbour.h>
52#include <uapi/linux/netdevice.h>
53#include <uapi/linux/if_bonding.h>
54
55struct netpoll_info;
56struct device;
57struct phy_device;
58
59struct wireless_dev;
60
61struct wpan_dev;
62struct mpls_dev;
63
64void netdev_set_default_ethtool_ops(struct net_device *dev,
65 const struct ethtool_ops *ops);
66
67
68#define NET_RX_SUCCESS 0
69#define NET_RX_DROP 1
70
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88
89#define NET_XMIT_SUCCESS 0x00
90#define NET_XMIT_DROP 0x01
91#define NET_XMIT_CN 0x02
92#define NET_XMIT_POLICED 0x03
93#define NET_XMIT_MASK 0x0f
94
95
96
97
98#define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
99#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
100
101
102#define NETDEV_TX_MASK 0xf0
103
104enum netdev_tx {
105 __NETDEV_TX_MIN = INT_MIN,
106 NETDEV_TX_OK = 0x00,
107 NETDEV_TX_BUSY = 0x10,
108 NETDEV_TX_LOCKED = 0x20,
109};
110typedef enum netdev_tx netdev_tx_t;
111
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114
115
116static inline bool dev_xmit_complete(int rc)
117{
118
119
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121
122
123
124 if (likely(rc < NET_XMIT_MASK))
125 return true;
126
127 return false;
128}
129
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133
134
135#if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
136# if defined(CONFIG_MAC80211_MESH)
137# define LL_MAX_HEADER 128
138# else
139# define LL_MAX_HEADER 96
140# endif
141#else
142# define LL_MAX_HEADER 32
143#endif
144
145#if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
146 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
147#define MAX_HEADER LL_MAX_HEADER
148#else
149#define MAX_HEADER (LL_MAX_HEADER + 48)
150#endif
151
152
153
154
155
156
157struct net_device_stats {
158 unsigned long rx_packets;
159 unsigned long tx_packets;
160 unsigned long rx_bytes;
161 unsigned long tx_bytes;
162 unsigned long rx_errors;
163 unsigned long tx_errors;
164 unsigned long rx_dropped;
165 unsigned long tx_dropped;
166 unsigned long multicast;
167 unsigned long collisions;
168 unsigned long rx_length_errors;
169 unsigned long rx_over_errors;
170 unsigned long rx_crc_errors;
171 unsigned long rx_frame_errors;
172 unsigned long rx_fifo_errors;
173 unsigned long rx_missed_errors;
174 unsigned long tx_aborted_errors;
175 unsigned long tx_carrier_errors;
176 unsigned long tx_fifo_errors;
177 unsigned long tx_heartbeat_errors;
178 unsigned long tx_window_errors;
179 unsigned long rx_compressed;
180 unsigned long tx_compressed;
181};
182
183
184#include <linux/cache.h>
185#include <linux/skbuff.h>
186
187#ifdef CONFIG_RPS
188#include <linux/static_key.h>
189extern struct static_key rps_needed;
190#endif
191
192struct neighbour;
193struct neigh_parms;
194struct sk_buff;
195
196struct netdev_hw_addr {
197 struct list_head list;
198 unsigned char addr[MAX_ADDR_LEN];
199 unsigned char type;
200#define NETDEV_HW_ADDR_T_LAN 1
201#define NETDEV_HW_ADDR_T_SAN 2
202#define NETDEV_HW_ADDR_T_SLAVE 3
203#define NETDEV_HW_ADDR_T_UNICAST 4
204#define NETDEV_HW_ADDR_T_MULTICAST 5
205 bool global_use;
206 int sync_cnt;
207 int refcount;
208 int synced;
209 struct rcu_head rcu_head;
210};
211
212struct netdev_hw_addr_list {
213 struct list_head list;
214 int count;
215};
216
217#define netdev_hw_addr_list_count(l) ((l)->count)
218#define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
219#define netdev_hw_addr_list_for_each(ha, l) \
220 list_for_each_entry(ha, &(l)->list, list)
221
222#define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
223#define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
224#define netdev_for_each_uc_addr(ha, dev) \
225 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
226
227#define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
228#define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
229#define netdev_for_each_mc_addr(ha, dev) \
230 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
231
232struct hh_cache {
233 u16 hh_len;
234 u16 __pad;
235 seqlock_t hh_lock;
236
237
238#define HH_DATA_MOD 16
239#define HH_DATA_OFF(__len) \
240 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
241#define HH_DATA_ALIGN(__len) \
242 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
243 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
244};
245
246
247
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249
250
251
252
253
254#define LL_RESERVED_SPACE(dev) \
255 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
256#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
257 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
258
259struct header_ops {
260 int (*create) (struct sk_buff *skb, struct net_device *dev,
261 unsigned short type, const void *daddr,
262 const void *saddr, unsigned int len);
263 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
264 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
265 void (*cache_update)(struct hh_cache *hh,
266 const struct net_device *dev,
267 const unsigned char *haddr);
268};
269
270
271
272
273
274
275enum netdev_state_t {
276 __LINK_STATE_START,
277 __LINK_STATE_PRESENT,
278 __LINK_STATE_NOCARRIER,
279 __LINK_STATE_LINKWATCH_PENDING,
280 __LINK_STATE_DORMANT,
281};
282
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286
287
288struct netdev_boot_setup {
289 char name[IFNAMSIZ];
290 struct ifmap map;
291};
292#define NETDEV_BOOT_SETUP_MAX 8
293
294int __init netdev_boot_setup(char *str);
295
296
297
298
299struct napi_struct {
300
301
302
303
304
305
306 struct list_head poll_list;
307
308 unsigned long state;
309 int weight;
310 unsigned int gro_count;
311 int (*poll)(struct napi_struct *, int);
312#ifdef CONFIG_NETPOLL
313 spinlock_t poll_lock;
314 int poll_owner;
315#endif
316 struct net_device *dev;
317 struct sk_buff *gro_list;
318 struct sk_buff *skb;
319 struct hrtimer timer;
320 struct list_head dev_list;
321 struct hlist_node napi_hash_node;
322 unsigned int napi_id;
323};
324
325enum {
326 NAPI_STATE_SCHED,
327 NAPI_STATE_DISABLE,
328 NAPI_STATE_NPSVC,
329 NAPI_STATE_HASHED,
330};
331
332enum gro_result {
333 GRO_MERGED,
334 GRO_MERGED_FREE,
335 GRO_HELD,
336 GRO_NORMAL,
337 GRO_DROP,
338};
339typedef enum gro_result gro_result_t;
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382enum rx_handler_result {
383 RX_HANDLER_CONSUMED,
384 RX_HANDLER_ANOTHER,
385 RX_HANDLER_EXACT,
386 RX_HANDLER_PASS,
387};
388typedef enum rx_handler_result rx_handler_result_t;
389typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
390
391void __napi_schedule(struct napi_struct *n);
392void __napi_schedule_irqoff(struct napi_struct *n);
393
394static inline bool napi_disable_pending(struct napi_struct *n)
395{
396 return test_bit(NAPI_STATE_DISABLE, &n->state);
397}
398
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407
408static inline bool napi_schedule_prep(struct napi_struct *n)
409{
410 return !napi_disable_pending(n) &&
411 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
412}
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420
421static inline void napi_schedule(struct napi_struct *n)
422{
423 if (napi_schedule_prep(n))
424 __napi_schedule(n);
425}
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431
432
433static inline void napi_schedule_irqoff(struct napi_struct *n)
434{
435 if (napi_schedule_prep(n))
436 __napi_schedule_irqoff(n);
437}
438
439
440static inline bool napi_reschedule(struct napi_struct *napi)
441{
442 if (napi_schedule_prep(napi)) {
443 __napi_schedule(napi);
444 return true;
445 }
446 return false;
447}
448
449void __napi_complete(struct napi_struct *n);
450void napi_complete_done(struct napi_struct *n, int work_done);
451
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458static inline void napi_complete(struct napi_struct *n)
459{
460 return napi_complete_done(n, 0);
461}
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468
469
470struct napi_struct *napi_by_id(unsigned int napi_id);
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477
478void napi_hash_add(struct napi_struct *napi);
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487void napi_hash_del(struct napi_struct *napi);
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496void napi_disable(struct napi_struct *n);
497
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504
505static inline void napi_enable(struct napi_struct *n)
506{
507 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
508 smp_mb__before_atomic();
509 clear_bit(NAPI_STATE_SCHED, &n->state);
510}
511
512#ifdef CONFIG_SMP
513
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518
519
520
521static inline void napi_synchronize(const struct napi_struct *n)
522{
523 while (test_bit(NAPI_STATE_SCHED, &n->state))
524 msleep(1);
525}
526#else
527# define napi_synchronize(n) barrier()
528#endif
529
530enum netdev_queue_state_t {
531 __QUEUE_STATE_DRV_XOFF,
532 __QUEUE_STATE_STACK_XOFF,
533 __QUEUE_STATE_FROZEN,
534};
535
536#define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
537#define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
538#define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
539
540#define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
541#define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
542 QUEUE_STATE_FROZEN)
543#define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
544 QUEUE_STATE_FROZEN)
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555
556struct netdev_queue {
557
558
559
560 struct net_device *dev;
561 struct Qdisc __rcu *qdisc;
562 struct Qdisc *qdisc_sleeping;
563#ifdef CONFIG_SYSFS
564 struct kobject kobj;
565#endif
566#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
567 int numa_node;
568#endif
569
570
571
572 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
573 int xmit_lock_owner;
574
575
576
577 unsigned long trans_start;
578
579
580
581
582
583 unsigned long trans_timeout;
584
585 unsigned long state;
586
587#ifdef CONFIG_BQL
588 struct dql dql;
589#endif
590 unsigned long tx_maxrate;
591} ____cacheline_aligned_in_smp;
592
593static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
594{
595#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
596 return q->numa_node;
597#else
598 return NUMA_NO_NODE;
599#endif
600}
601
602static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
603{
604#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
605 q->numa_node = node;
606#endif
607}
608
609#ifdef CONFIG_RPS
610
611
612
613
614struct rps_map {
615 unsigned int len;
616 struct rcu_head rcu;
617 u16 cpus[0];
618};
619#define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
620
621
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623
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625
626struct rps_dev_flow {
627 u16 cpu;
628 u16 filter;
629 unsigned int last_qtail;
630};
631#define RPS_NO_FILTER 0xffff
632
633
634
635
636struct rps_dev_flow_table {
637 unsigned int mask;
638 struct rcu_head rcu;
639 struct rps_dev_flow flows[0];
640};
641#define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
642 ((_num) * sizeof(struct rps_dev_flow)))
643
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653
654struct rps_sock_flow_table {
655 u32 mask;
656
657 u32 ents[0] ____cacheline_aligned_in_smp;
658};
659#define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
660
661#define RPS_NO_CPU 0xffff
662
663extern u32 rps_cpu_mask;
664extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
665
666static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
667 u32 hash)
668{
669 if (table && hash) {
670 unsigned int index = hash & table->mask;
671 u32 val = hash & ~rps_cpu_mask;
672
673
674 val |= raw_smp_processor_id();
675
676 if (table->ents[index] != val)
677 table->ents[index] = val;
678 }
679}
680
681#ifdef CONFIG_RFS_ACCEL
682bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
683 u16 filter_id);
684#endif
685#endif
686
687
688struct netdev_rx_queue {
689#ifdef CONFIG_RPS
690 struct rps_map __rcu *rps_map;
691 struct rps_dev_flow_table __rcu *rps_flow_table;
692#endif
693 struct kobject kobj;
694 struct net_device *dev;
695} ____cacheline_aligned_in_smp;
696
697
698
699
700struct rx_queue_attribute {
701 struct attribute attr;
702 ssize_t (*show)(struct netdev_rx_queue *queue,
703 struct rx_queue_attribute *attr, char *buf);
704 ssize_t (*store)(struct netdev_rx_queue *queue,
705 struct rx_queue_attribute *attr, const char *buf, size_t len);
706};
707
708#ifdef CONFIG_XPS
709
710
711
712
713struct xps_map {
714 unsigned int len;
715 unsigned int alloc_len;
716 struct rcu_head rcu;
717 u16 queues[0];
718};
719#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
720#define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
721 / sizeof(u16))
722
723
724
725
726struct xps_dev_maps {
727 struct rcu_head rcu;
728 struct xps_map __rcu *cpu_map[0];
729};
730#define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
731 (nr_cpu_ids * sizeof(struct xps_map *)))
732#endif
733
734#define TC_MAX_QUEUE 16
735#define TC_BITMASK 15
736
737struct netdev_tc_txq {
738 u16 count;
739 u16 offset;
740};
741
742#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
743
744
745
746
747struct netdev_fcoe_hbainfo {
748 char manufacturer[64];
749 char serial_number[64];
750 char hardware_version[64];
751 char driver_version[64];
752 char optionrom_version[64];
753 char firmware_version[64];
754 char model[256];
755 char model_description[256];
756};
757#endif
758
759#define MAX_PHYS_ITEM_ID_LEN 32
760
761
762
763
764struct netdev_phys_item_id {
765 unsigned char id[MAX_PHYS_ITEM_ID_LEN];
766 unsigned char id_len;
767};
768
769typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
770 struct sk_buff *skb);
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1045struct net_device_ops {
1046 int (*ndo_init)(struct net_device *dev);
1047 void (*ndo_uninit)(struct net_device *dev);
1048 int (*ndo_open)(struct net_device *dev);
1049 int (*ndo_stop)(struct net_device *dev);
1050 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
1051 struct net_device *dev);
1052 u16 (*ndo_select_queue)(struct net_device *dev,
1053 struct sk_buff *skb,
1054 void *accel_priv,
1055 select_queue_fallback_t fallback);
1056 void (*ndo_change_rx_flags)(struct net_device *dev,
1057 int flags);
1058 void (*ndo_set_rx_mode)(struct net_device *dev);
1059 int (*ndo_set_mac_address)(struct net_device *dev,
1060 void *addr);
1061 int (*ndo_validate_addr)(struct net_device *dev);
1062 int (*ndo_do_ioctl)(struct net_device *dev,
1063 struct ifreq *ifr, int cmd);
1064 int (*ndo_set_config)(struct net_device *dev,
1065 struct ifmap *map);
1066 int (*ndo_change_mtu)(struct net_device *dev,
1067 int new_mtu);
1068 int (*ndo_neigh_setup)(struct net_device *dev,
1069 struct neigh_parms *);
1070 void (*ndo_tx_timeout) (struct net_device *dev);
1071
1072 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
1073 struct rtnl_link_stats64 *storage);
1074 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1075
1076 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1077 __be16 proto, u16 vid);
1078 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1079 __be16 proto, u16 vid);
1080#ifdef CONFIG_NET_POLL_CONTROLLER
1081 void (*ndo_poll_controller)(struct net_device *dev);
1082 int (*ndo_netpoll_setup)(struct net_device *dev,
1083 struct netpoll_info *info);
1084 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1085#endif
1086#ifdef CONFIG_NET_RX_BUSY_POLL
1087 int (*ndo_busy_poll)(struct napi_struct *dev);
1088#endif
1089 int (*ndo_set_vf_mac)(struct net_device *dev,
1090 int queue, u8 *mac);
1091 int (*ndo_set_vf_vlan)(struct net_device *dev,
1092 int queue, u16 vlan, u8 qos);
1093 int (*ndo_set_vf_rate)(struct net_device *dev,
1094 int vf, int min_tx_rate,
1095 int max_tx_rate);
1096 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1097 int vf, bool setting);
1098 int (*ndo_get_vf_config)(struct net_device *dev,
1099 int vf,
1100 struct ifla_vf_info *ivf);
1101 int (*ndo_set_vf_link_state)(struct net_device *dev,
1102 int vf, int link_state);
1103 int (*ndo_set_vf_port)(struct net_device *dev,
1104 int vf,
1105 struct nlattr *port[]);
1106 int (*ndo_get_vf_port)(struct net_device *dev,
1107 int vf, struct sk_buff *skb);
1108 int (*ndo_set_vf_rss_query_en)(
1109 struct net_device *dev,
1110 int vf, bool setting);
1111 int (*ndo_setup_tc)(struct net_device *dev, u8 tc);
1112#if IS_ENABLED(CONFIG_FCOE)
1113 int (*ndo_fcoe_enable)(struct net_device *dev);
1114 int (*ndo_fcoe_disable)(struct net_device *dev);
1115 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1116 u16 xid,
1117 struct scatterlist *sgl,
1118 unsigned int sgc);
1119 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1120 u16 xid);
1121 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1122 u16 xid,
1123 struct scatterlist *sgl,
1124 unsigned int sgc);
1125 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1126 struct netdev_fcoe_hbainfo *hbainfo);
1127#endif
1128
1129#if IS_ENABLED(CONFIG_LIBFCOE)
1130#define NETDEV_FCOE_WWNN 0
1131#define NETDEV_FCOE_WWPN 1
1132 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1133 u64 *wwn, int type);
1134#endif
1135
1136#ifdef CONFIG_RFS_ACCEL
1137 int (*ndo_rx_flow_steer)(struct net_device *dev,
1138 const struct sk_buff *skb,
1139 u16 rxq_index,
1140 u32 flow_id);
1141#endif
1142 int (*ndo_add_slave)(struct net_device *dev,
1143 struct net_device *slave_dev);
1144 int (*ndo_del_slave)(struct net_device *dev,
1145 struct net_device *slave_dev);
1146 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1147 netdev_features_t features);
1148 int (*ndo_set_features)(struct net_device *dev,
1149 netdev_features_t features);
1150 int (*ndo_neigh_construct)(struct neighbour *n);
1151 void (*ndo_neigh_destroy)(struct neighbour *n);
1152
1153 int (*ndo_fdb_add)(struct ndmsg *ndm,
1154 struct nlattr *tb[],
1155 struct net_device *dev,
1156 const unsigned char *addr,
1157 u16 vid,
1158 u16 flags);
1159 int (*ndo_fdb_del)(struct ndmsg *ndm,
1160 struct nlattr *tb[],
1161 struct net_device *dev,
1162 const unsigned char *addr,
1163 u16 vid);
1164 int (*ndo_fdb_dump)(struct sk_buff *skb,
1165 struct netlink_callback *cb,
1166 struct net_device *dev,
1167 struct net_device *filter_dev,
1168 int idx);
1169
1170 int (*ndo_bridge_setlink)(struct net_device *dev,
1171 struct nlmsghdr *nlh,
1172 u16 flags);
1173 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1174 u32 pid, u32 seq,
1175 struct net_device *dev,
1176 u32 filter_mask,
1177 int nlflags);
1178 int (*ndo_bridge_dellink)(struct net_device *dev,
1179 struct nlmsghdr *nlh,
1180 u16 flags);
1181 int (*ndo_change_carrier)(struct net_device *dev,
1182 bool new_carrier);
1183 int (*ndo_get_phys_port_id)(struct net_device *dev,
1184 struct netdev_phys_item_id *ppid);
1185 int (*ndo_get_phys_port_name)(struct net_device *dev,
1186 char *name, size_t len);
1187 void (*ndo_add_vxlan_port)(struct net_device *dev,
1188 sa_family_t sa_family,
1189 __be16 port);
1190 void (*ndo_del_vxlan_port)(struct net_device *dev,
1191 sa_family_t sa_family,
1192 __be16 port);
1193
1194 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1195 struct net_device *dev);
1196 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1197 void *priv);
1198
1199 netdev_tx_t (*ndo_dfwd_start_xmit) (struct sk_buff *skb,
1200 struct net_device *dev,
1201 void *priv);
1202 int (*ndo_get_lock_subclass)(struct net_device *dev);
1203 netdev_features_t (*ndo_features_check) (struct sk_buff *skb,
1204 struct net_device *dev,
1205 netdev_features_t features);
1206 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1207 int queue_index,
1208 u32 maxrate);
1209 int (*ndo_get_iflink)(const struct net_device *dev);
1210};
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1247enum netdev_priv_flags {
1248 IFF_802_1Q_VLAN = 1<<0,
1249 IFF_EBRIDGE = 1<<1,
1250 IFF_SLAVE_INACTIVE = 1<<2,
1251 IFF_MASTER_8023AD = 1<<3,
1252 IFF_MASTER_ALB = 1<<4,
1253 IFF_BONDING = 1<<5,
1254 IFF_SLAVE_NEEDARP = 1<<6,
1255 IFF_ISATAP = 1<<7,
1256 IFF_MASTER_ARPMON = 1<<8,
1257 IFF_WAN_HDLC = 1<<9,
1258 IFF_XMIT_DST_RELEASE = 1<<10,
1259 IFF_DONT_BRIDGE = 1<<11,
1260 IFF_DISABLE_NETPOLL = 1<<12,
1261 IFF_MACVLAN_PORT = 1<<13,
1262 IFF_BRIDGE_PORT = 1<<14,
1263 IFF_OVS_DATAPATH = 1<<15,
1264 IFF_TX_SKB_SHARING = 1<<16,
1265 IFF_UNICAST_FLT = 1<<17,
1266 IFF_TEAM_PORT = 1<<18,
1267 IFF_SUPP_NOFCS = 1<<19,
1268 IFF_LIVE_ADDR_CHANGE = 1<<20,
1269 IFF_MACVLAN = 1<<21,
1270 IFF_XMIT_DST_RELEASE_PERM = 1<<22,
1271 IFF_IPVLAN_MASTER = 1<<23,
1272 IFF_IPVLAN_SLAVE = 1<<24,
1273};
1274
1275#define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1276#define IFF_EBRIDGE IFF_EBRIDGE
1277#define IFF_SLAVE_INACTIVE IFF_SLAVE_INACTIVE
1278#define IFF_MASTER_8023AD IFF_MASTER_8023AD
1279#define IFF_MASTER_ALB IFF_MASTER_ALB
1280#define IFF_BONDING IFF_BONDING
1281#define IFF_SLAVE_NEEDARP IFF_SLAVE_NEEDARP
1282#define IFF_ISATAP IFF_ISATAP
1283#define IFF_MASTER_ARPMON IFF_MASTER_ARPMON
1284#define IFF_WAN_HDLC IFF_WAN_HDLC
1285#define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1286#define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1287#define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1288#define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1289#define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1290#define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1291#define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1292#define IFF_UNICAST_FLT IFF_UNICAST_FLT
1293#define IFF_TEAM_PORT IFF_TEAM_PORT
1294#define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1295#define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1296#define IFF_MACVLAN IFF_MACVLAN
1297#define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1298#define IFF_IPVLAN_MASTER IFF_IPVLAN_MASTER
1299#define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE
1300
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1505struct net_device {
1506 char name[IFNAMSIZ];
1507 struct hlist_node name_hlist;
1508 char *ifalias;
1509
1510
1511
1512
1513 unsigned long mem_end;
1514 unsigned long mem_start;
1515 unsigned long base_addr;
1516 int irq;
1517
1518 atomic_t carrier_changes;
1519
1520
1521
1522
1523
1524
1525
1526 unsigned long state;
1527
1528 struct list_head dev_list;
1529 struct list_head napi_list;
1530 struct list_head unreg_list;
1531 struct list_head close_list;
1532 struct list_head ptype_all;
1533 struct list_head ptype_specific;
1534
1535 struct {
1536 struct list_head upper;
1537 struct list_head lower;
1538 } adj_list;
1539
1540 struct {
1541 struct list_head upper;
1542 struct list_head lower;
1543 } all_adj_list;
1544
1545 netdev_features_t features;
1546 netdev_features_t hw_features;
1547 netdev_features_t wanted_features;
1548 netdev_features_t vlan_features;
1549 netdev_features_t hw_enc_features;
1550 netdev_features_t mpls_features;
1551
1552 int ifindex;
1553 int group;
1554
1555 struct net_device_stats stats;
1556
1557 atomic_long_t rx_dropped;
1558 atomic_long_t tx_dropped;
1559
1560#ifdef CONFIG_WIRELESS_EXT
1561 const struct iw_handler_def * wireless_handlers;
1562 struct iw_public_data * wireless_data;
1563#endif
1564 const struct net_device_ops *netdev_ops;
1565 const struct ethtool_ops *ethtool_ops;
1566#ifdef CONFIG_NET_SWITCHDEV
1567 const struct swdev_ops *swdev_ops;
1568#endif
1569
1570 const struct header_ops *header_ops;
1571
1572 unsigned int flags;
1573 unsigned int priv_flags;
1574
1575 unsigned short gflags;
1576 unsigned short padded;
1577
1578 unsigned char operstate;
1579 unsigned char link_mode;
1580
1581 unsigned char if_port;
1582 unsigned char dma;
1583
1584 unsigned int mtu;
1585 unsigned short type;
1586 unsigned short hard_header_len;
1587
1588 unsigned short needed_headroom;
1589 unsigned short needed_tailroom;
1590
1591
1592 unsigned char perm_addr[MAX_ADDR_LEN];
1593 unsigned char addr_assign_type;
1594 unsigned char addr_len;
1595 unsigned short neigh_priv_len;
1596 unsigned short dev_id;
1597 unsigned short dev_port;
1598 spinlock_t addr_list_lock;
1599 unsigned char name_assign_type;
1600 bool uc_promisc;
1601 struct netdev_hw_addr_list uc;
1602 struct netdev_hw_addr_list mc;
1603 struct netdev_hw_addr_list dev_addrs;
1604
1605#ifdef CONFIG_SYSFS
1606 struct kset *queues_kset;
1607#endif
1608 unsigned int promiscuity;
1609 unsigned int allmulti;
1610
1611
1612
1613
1614#if IS_ENABLED(CONFIG_VLAN_8021Q)
1615 struct vlan_info __rcu *vlan_info;
1616#endif
1617#if IS_ENABLED(CONFIG_NET_DSA)
1618 struct dsa_switch_tree *dsa_ptr;
1619#endif
1620#if IS_ENABLED(CONFIG_TIPC)
1621 struct tipc_bearer __rcu *tipc_ptr;
1622#endif
1623 void *atalk_ptr;
1624 struct in_device __rcu *ip_ptr;
1625 struct dn_dev __rcu *dn_ptr;
1626 struct inet6_dev __rcu *ip6_ptr;
1627 void *ax25_ptr;
1628 struct wireless_dev *ieee80211_ptr;
1629 struct wpan_dev *ieee802154_ptr;
1630#if IS_ENABLED(CONFIG_MPLS_ROUTING)
1631 struct mpls_dev __rcu *mpls_ptr;
1632#endif
1633
1634
1635
1636
1637 unsigned long last_rx;
1638
1639
1640 unsigned char *dev_addr;
1641
1642
1643#ifdef CONFIG_SYSFS
1644 struct netdev_rx_queue *_rx;
1645
1646 unsigned int num_rx_queues;
1647 unsigned int real_num_rx_queues;
1648
1649#endif
1650
1651 unsigned long gro_flush_timeout;
1652 rx_handler_func_t __rcu *rx_handler;
1653 void __rcu *rx_handler_data;
1654
1655 struct netdev_queue __rcu *ingress_queue;
1656 unsigned char broadcast[MAX_ADDR_LEN];
1657#ifdef CONFIG_RFS_ACCEL
1658 struct cpu_rmap *rx_cpu_rmap;
1659#endif
1660 struct hlist_node index_hlist;
1661
1662
1663
1664
1665 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1666 unsigned int num_tx_queues;
1667 unsigned int real_num_tx_queues;
1668 struct Qdisc *qdisc;
1669 unsigned long tx_queue_len;
1670 spinlock_t tx_global_lock;
1671 int watchdog_timeo;
1672
1673#ifdef CONFIG_XPS
1674 struct xps_dev_maps __rcu *xps_maps;
1675#endif
1676
1677
1678
1679
1680
1681
1682
1683 unsigned long trans_start;
1684
1685 struct timer_list watchdog_timer;
1686
1687 int __percpu *pcpu_refcnt;
1688 struct list_head todo_list;
1689
1690 struct list_head link_watch_list;
1691
1692 enum { NETREG_UNINITIALIZED=0,
1693 NETREG_REGISTERED,
1694 NETREG_UNREGISTERING,
1695 NETREG_UNREGISTERED,
1696 NETREG_RELEASED,
1697 NETREG_DUMMY,
1698 } reg_state:8;
1699
1700 bool dismantle;
1701
1702 enum {
1703 RTNL_LINK_INITIALIZED,
1704 RTNL_LINK_INITIALIZING,
1705 } rtnl_link_state:16;
1706
1707 void (*destructor)(struct net_device *dev);
1708
1709#ifdef CONFIG_NETPOLL
1710 struct netpoll_info __rcu *npinfo;
1711#endif
1712
1713 possible_net_t nd_net;
1714
1715
1716 union {
1717 void *ml_priv;
1718 struct pcpu_lstats __percpu *lstats;
1719 struct pcpu_sw_netstats __percpu *tstats;
1720 struct pcpu_dstats __percpu *dstats;
1721 struct pcpu_vstats __percpu *vstats;
1722 };
1723
1724 struct garp_port __rcu *garp_port;
1725 struct mrp_port __rcu *mrp_port;
1726
1727 struct device dev;
1728 const struct attribute_group *sysfs_groups[4];
1729 const struct attribute_group *sysfs_rx_queue_group;
1730
1731 const struct rtnl_link_ops *rtnl_link_ops;
1732
1733
1734#define GSO_MAX_SIZE 65536
1735 unsigned int gso_max_size;
1736#define GSO_MAX_SEGS 65535
1737 u16 gso_max_segs;
1738 u16 gso_min_segs;
1739#ifdef CONFIG_DCB
1740 const struct dcbnl_rtnl_ops *dcbnl_ops;
1741#endif
1742 u8 num_tc;
1743 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
1744 u8 prio_tc_map[TC_BITMASK + 1];
1745
1746#if IS_ENABLED(CONFIG_FCOE)
1747 unsigned int fcoe_ddp_xid;
1748#endif
1749#if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1750 struct netprio_map __rcu *priomap;
1751#endif
1752 struct phy_device *phydev;
1753 struct lock_class_key *qdisc_tx_busylock;
1754};
1755#define to_net_dev(d) container_of(d, struct net_device, dev)
1756
1757#define NETDEV_ALIGN 32
1758
1759static inline
1760int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
1761{
1762 return dev->prio_tc_map[prio & TC_BITMASK];
1763}
1764
1765static inline
1766int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
1767{
1768 if (tc >= dev->num_tc)
1769 return -EINVAL;
1770
1771 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
1772 return 0;
1773}
1774
1775static inline
1776void netdev_reset_tc(struct net_device *dev)
1777{
1778 dev->num_tc = 0;
1779 memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
1780 memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
1781}
1782
1783static inline
1784int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
1785{
1786 if (tc >= dev->num_tc)
1787 return -EINVAL;
1788
1789 dev->tc_to_txq[tc].count = count;
1790 dev->tc_to_txq[tc].offset = offset;
1791 return 0;
1792}
1793
1794static inline
1795int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
1796{
1797 if (num_tc > TC_MAX_QUEUE)
1798 return -EINVAL;
1799
1800 dev->num_tc = num_tc;
1801 return 0;
1802}
1803
1804static inline
1805int netdev_get_num_tc(struct net_device *dev)
1806{
1807 return dev->num_tc;
1808}
1809
1810static inline
1811struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1812 unsigned int index)
1813{
1814 return &dev->_tx[index];
1815}
1816
1817static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
1818 const struct sk_buff *skb)
1819{
1820 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
1821}
1822
1823static inline void netdev_for_each_tx_queue(struct net_device *dev,
1824 void (*f)(struct net_device *,
1825 struct netdev_queue *,
1826 void *),
1827 void *arg)
1828{
1829 unsigned int i;
1830
1831 for (i = 0; i < dev->num_tx_queues; i++)
1832 f(dev, &dev->_tx[i], arg);
1833}
1834
1835struct netdev_queue *netdev_pick_tx(struct net_device *dev,
1836 struct sk_buff *skb,
1837 void *accel_priv);
1838
1839
1840
1841
1842static inline
1843struct net *dev_net(const struct net_device *dev)
1844{
1845 return read_pnet(&dev->nd_net);
1846}
1847
1848static inline
1849void dev_net_set(struct net_device *dev, struct net *net)
1850{
1851 write_pnet(&dev->nd_net, net);
1852}
1853
1854static inline bool netdev_uses_dsa(struct net_device *dev)
1855{
1856#if IS_ENABLED(CONFIG_NET_DSA)
1857 if (dev->dsa_ptr != NULL)
1858 return dsa_uses_tagged_protocol(dev->dsa_ptr);
1859#endif
1860 return false;
1861}
1862
1863
1864
1865
1866
1867
1868
1869static inline void *netdev_priv(const struct net_device *dev)
1870{
1871 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1872}
1873
1874
1875
1876
1877#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1878
1879
1880
1881
1882
1883#define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1884
1885
1886
1887
1888#define NAPI_POLL_WEIGHT 64
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1901 int (*poll)(struct napi_struct *, int), int weight);
1902
1903
1904
1905
1906
1907
1908
1909void netif_napi_del(struct napi_struct *napi);
1910
1911struct napi_gro_cb {
1912
1913 void *frag0;
1914
1915
1916 unsigned int frag0_len;
1917
1918
1919 int data_offset;
1920
1921
1922 u16 flush;
1923
1924
1925 u16 flush_id;
1926
1927
1928 u16 count;
1929
1930
1931 u16 gro_remcsum_start;
1932
1933
1934 unsigned long age;
1935
1936
1937 u16 proto;
1938
1939
1940 u8 same_flow:1;
1941
1942
1943 u8 udp_mark:1;
1944
1945
1946 u8 csum_valid:1;
1947
1948
1949 u8 csum_cnt:3;
1950
1951
1952 u8 free:2;
1953#define NAPI_GRO_FREE 1
1954#define NAPI_GRO_FREE_STOLEN_HEAD 2
1955
1956
1957 u8 is_ipv6:1;
1958
1959
1960
1961
1962 __wsum csum;
1963
1964
1965 struct sk_buff *last;
1966};
1967
1968#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1969
1970struct packet_type {
1971 __be16 type;
1972 struct net_device *dev;
1973 int (*func) (struct sk_buff *,
1974 struct net_device *,
1975 struct packet_type *,
1976 struct net_device *);
1977 bool (*id_match)(struct packet_type *ptype,
1978 struct sock *sk);
1979 void *af_packet_priv;
1980 struct list_head list;
1981};
1982
1983struct offload_callbacks {
1984 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1985 netdev_features_t features);
1986 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1987 struct sk_buff *skb);
1988 int (*gro_complete)(struct sk_buff *skb, int nhoff);
1989};
1990
1991struct packet_offload {
1992 __be16 type;
1993 struct offload_callbacks callbacks;
1994 struct list_head list;
1995};
1996
1997struct udp_offload;
1998
1999struct udp_offload_callbacks {
2000 struct sk_buff **(*gro_receive)(struct sk_buff **head,
2001 struct sk_buff *skb,
2002 struct udp_offload *uoff);
2003 int (*gro_complete)(struct sk_buff *skb,
2004 int nhoff,
2005 struct udp_offload *uoff);
2006};
2007
2008struct udp_offload {
2009 __be16 port;
2010 u8 ipproto;
2011 struct udp_offload_callbacks callbacks;
2012};
2013
2014
2015struct pcpu_sw_netstats {
2016 u64 rx_packets;
2017 u64 rx_bytes;
2018 u64 tx_packets;
2019 u64 tx_bytes;
2020 struct u64_stats_sync syncp;
2021};
2022
2023#define netdev_alloc_pcpu_stats(type) \
2024({ \
2025 typeof(type) __percpu *pcpu_stats = alloc_percpu(type); \
2026 if (pcpu_stats) { \
2027 int __cpu; \
2028 for_each_possible_cpu(__cpu) { \
2029 typeof(type) *stat; \
2030 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2031 u64_stats_init(&stat->syncp); \
2032 } \
2033 } \
2034 pcpu_stats; \
2035})
2036
2037#include <linux/notifier.h>
2038
2039
2040
2041
2042
2043#define NETDEV_UP 0x0001
2044#define NETDEV_DOWN 0x0002
2045#define NETDEV_REBOOT 0x0003
2046
2047
2048
2049#define NETDEV_CHANGE 0x0004
2050#define NETDEV_REGISTER 0x0005
2051#define NETDEV_UNREGISTER 0x0006
2052#define NETDEV_CHANGEMTU 0x0007
2053#define NETDEV_CHANGEADDR 0x0008
2054#define NETDEV_GOING_DOWN 0x0009
2055#define NETDEV_CHANGENAME 0x000A
2056#define NETDEV_FEAT_CHANGE 0x000B
2057#define NETDEV_BONDING_FAILOVER 0x000C
2058#define NETDEV_PRE_UP 0x000D
2059#define NETDEV_PRE_TYPE_CHANGE 0x000E
2060#define NETDEV_POST_TYPE_CHANGE 0x000F
2061#define NETDEV_POST_INIT 0x0010
2062#define NETDEV_UNREGISTER_FINAL 0x0011
2063#define NETDEV_RELEASE 0x0012
2064#define NETDEV_NOTIFY_PEERS 0x0013
2065#define NETDEV_JOIN 0x0014
2066#define NETDEV_CHANGEUPPER 0x0015
2067#define NETDEV_RESEND_IGMP 0x0016
2068#define NETDEV_PRECHANGEMTU 0x0017
2069#define NETDEV_CHANGEINFODATA 0x0018
2070#define NETDEV_BONDING_INFO 0x0019
2071
2072int register_netdevice_notifier(struct notifier_block *nb);
2073int unregister_netdevice_notifier(struct notifier_block *nb);
2074
2075struct netdev_notifier_info {
2076 struct net_device *dev;
2077};
2078
2079struct netdev_notifier_change_info {
2080 struct netdev_notifier_info info;
2081 unsigned int flags_changed;
2082};
2083
2084static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2085 struct net_device *dev)
2086{
2087 info->dev = dev;
2088}
2089
2090static inline struct net_device *
2091netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2092{
2093 return info->dev;
2094}
2095
2096int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2097
2098
2099extern rwlock_t dev_base_lock;
2100
2101#define for_each_netdev(net, d) \
2102 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2103#define for_each_netdev_reverse(net, d) \
2104 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2105#define for_each_netdev_rcu(net, d) \
2106 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2107#define for_each_netdev_safe(net, d, n) \
2108 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2109#define for_each_netdev_continue(net, d) \
2110 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2111#define for_each_netdev_continue_rcu(net, d) \
2112 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2113#define for_each_netdev_in_bond_rcu(bond, slave) \
2114 for_each_netdev_rcu(&init_net, slave) \
2115 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2116#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2117
2118static inline struct net_device *next_net_device(struct net_device *dev)
2119{
2120 struct list_head *lh;
2121 struct net *net;
2122
2123 net = dev_net(dev);
2124 lh = dev->dev_list.next;
2125 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2126}
2127
2128static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2129{
2130 struct list_head *lh;
2131 struct net *net;
2132
2133 net = dev_net(dev);
2134 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2135 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2136}
2137
2138static inline struct net_device *first_net_device(struct net *net)
2139{
2140 return list_empty(&net->dev_base_head) ? NULL :
2141 net_device_entry(net->dev_base_head.next);
2142}
2143
2144static inline struct net_device *first_net_device_rcu(struct net *net)
2145{
2146 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2147
2148 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2149}
2150
2151int netdev_boot_setup_check(struct net_device *dev);
2152unsigned long netdev_boot_base(const char *prefix, int unit);
2153struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2154 const char *hwaddr);
2155struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2156struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2157void dev_add_pack(struct packet_type *pt);
2158void dev_remove_pack(struct packet_type *pt);
2159void __dev_remove_pack(struct packet_type *pt);
2160void dev_add_offload(struct packet_offload *po);
2161void dev_remove_offload(struct packet_offload *po);
2162
2163int dev_get_iflink(const struct net_device *dev);
2164struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2165 unsigned short mask);
2166struct net_device *dev_get_by_name(struct net *net, const char *name);
2167struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2168struct net_device *__dev_get_by_name(struct net *net, const char *name);
2169int dev_alloc_name(struct net_device *dev, const char *name);
2170int dev_open(struct net_device *dev);
2171int dev_close(struct net_device *dev);
2172int dev_close_many(struct list_head *head, bool unlink);
2173void dev_disable_lro(struct net_device *dev);
2174int dev_loopback_xmit(struct sock *sk, struct sk_buff *newskb);
2175int dev_queue_xmit_sk(struct sock *sk, struct sk_buff *skb);
2176static inline int dev_queue_xmit(struct sk_buff *skb)
2177{
2178 return dev_queue_xmit_sk(skb->sk, skb);
2179}
2180int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv);
2181int register_netdevice(struct net_device *dev);
2182void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2183void unregister_netdevice_many(struct list_head *head);
2184static inline void unregister_netdevice(struct net_device *dev)
2185{
2186 unregister_netdevice_queue(dev, NULL);
2187}
2188
2189int netdev_refcnt_read(const struct net_device *dev);
2190void free_netdev(struct net_device *dev);
2191void netdev_freemem(struct net_device *dev);
2192void synchronize_net(void);
2193int init_dummy_netdev(struct net_device *dev);
2194
2195DECLARE_PER_CPU(int, xmit_recursion);
2196static inline int dev_recursion_level(void)
2197{
2198 return this_cpu_read(xmit_recursion);
2199}
2200
2201struct net_device *dev_get_by_index(struct net *net, int ifindex);
2202struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2203struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2204int netdev_get_name(struct net *net, char *name, int ifindex);
2205int dev_restart(struct net_device *dev);
2206int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb);
2207
2208static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2209{
2210 return NAPI_GRO_CB(skb)->data_offset;
2211}
2212
2213static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2214{
2215 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2216}
2217
2218static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2219{
2220 NAPI_GRO_CB(skb)->data_offset += len;
2221}
2222
2223static inline void *skb_gro_header_fast(struct sk_buff *skb,
2224 unsigned int offset)
2225{
2226 return NAPI_GRO_CB(skb)->frag0 + offset;
2227}
2228
2229static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2230{
2231 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2232}
2233
2234static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2235 unsigned int offset)
2236{
2237 if (!pskb_may_pull(skb, hlen))
2238 return NULL;
2239
2240 NAPI_GRO_CB(skb)->frag0 = NULL;
2241 NAPI_GRO_CB(skb)->frag0_len = 0;
2242 return skb->data + offset;
2243}
2244
2245static inline void *skb_gro_network_header(struct sk_buff *skb)
2246{
2247 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2248 skb_network_offset(skb);
2249}
2250
2251static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2252 const void *start, unsigned int len)
2253{
2254 if (NAPI_GRO_CB(skb)->csum_valid)
2255 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2256 csum_partial(start, len, 0));
2257}
2258
2259
2260
2261
2262
2263
2264__sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2265
2266static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2267{
2268 return (NAPI_GRO_CB(skb)->gro_remcsum_start - skb_headroom(skb) ==
2269 skb_gro_offset(skb));
2270}
2271
2272static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2273 bool zero_okay,
2274 __sum16 check)
2275{
2276 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2277 skb_checksum_start_offset(skb) <
2278 skb_gro_offset(skb)) &&
2279 !skb_at_gro_remcsum_start(skb) &&
2280 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2281 (!zero_okay || check));
2282}
2283
2284static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2285 __wsum psum)
2286{
2287 if (NAPI_GRO_CB(skb)->csum_valid &&
2288 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2289 return 0;
2290
2291 NAPI_GRO_CB(skb)->csum = psum;
2292
2293 return __skb_gro_checksum_complete(skb);
2294}
2295
2296static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2297{
2298 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2299
2300 NAPI_GRO_CB(skb)->csum_cnt--;
2301 } else {
2302
2303
2304
2305
2306 __skb_incr_checksum_unnecessary(skb);
2307 }
2308}
2309
2310#define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2311 compute_pseudo) \
2312({ \
2313 __sum16 __ret = 0; \
2314 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2315 __ret = __skb_gro_checksum_validate_complete(skb, \
2316 compute_pseudo(skb, proto)); \
2317 if (__ret) \
2318 __skb_mark_checksum_bad(skb); \
2319 else \
2320 skb_gro_incr_csum_unnecessary(skb); \
2321 __ret; \
2322})
2323
2324#define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2325 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2326
2327#define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2328 compute_pseudo) \
2329 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2330
2331#define skb_gro_checksum_simple_validate(skb) \
2332 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2333
2334static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2335{
2336 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2337 !NAPI_GRO_CB(skb)->csum_valid);
2338}
2339
2340static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2341 __sum16 check, __wsum pseudo)
2342{
2343 NAPI_GRO_CB(skb)->csum = ~pseudo;
2344 NAPI_GRO_CB(skb)->csum_valid = 1;
2345}
2346
2347#define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2348do { \
2349 if (__skb_gro_checksum_convert_check(skb)) \
2350 __skb_gro_checksum_convert(skb, check, \
2351 compute_pseudo(skb, proto)); \
2352} while (0)
2353
2354struct gro_remcsum {
2355 int offset;
2356 __wsum delta;
2357};
2358
2359static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2360{
2361 grc->offset = 0;
2362 grc->delta = 0;
2363}
2364
2365static inline void skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2366 int start, int offset,
2367 struct gro_remcsum *grc,
2368 bool nopartial)
2369{
2370 __wsum delta;
2371
2372 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2373
2374 if (!nopartial) {
2375 NAPI_GRO_CB(skb)->gro_remcsum_start =
2376 ((unsigned char *)ptr + start) - skb->head;
2377 return;
2378 }
2379
2380 delta = remcsum_adjust(ptr, NAPI_GRO_CB(skb)->csum, start, offset);
2381
2382
2383 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2384
2385 grc->offset = (ptr + offset) - (void *)skb->head;
2386 grc->delta = delta;
2387}
2388
2389static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2390 struct gro_remcsum *grc)
2391{
2392 if (!grc->delta)
2393 return;
2394
2395 remcsum_unadjust((__sum16 *)(skb->head + grc->offset), grc->delta);
2396}
2397
2398static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2399 unsigned short type,
2400 const void *daddr, const void *saddr,
2401 unsigned int len)
2402{
2403 if (!dev->header_ops || !dev->header_ops->create)
2404 return 0;
2405
2406 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2407}
2408
2409static inline int dev_parse_header(const struct sk_buff *skb,
2410 unsigned char *haddr)
2411{
2412 const struct net_device *dev = skb->dev;
2413
2414 if (!dev->header_ops || !dev->header_ops->parse)
2415 return 0;
2416 return dev->header_ops->parse(skb, haddr);
2417}
2418
2419typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
2420int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
2421static inline int unregister_gifconf(unsigned int family)
2422{
2423 return register_gifconf(family, NULL);
2424}
2425
2426#ifdef CONFIG_NET_FLOW_LIMIT
2427#define FLOW_LIMIT_HISTORY (1 << 7)
2428struct sd_flow_limit {
2429 u64 count;
2430 unsigned int num_buckets;
2431 unsigned int history_head;
2432 u16 history[FLOW_LIMIT_HISTORY];
2433 u8 buckets[];
2434};
2435
2436extern int netdev_flow_limit_table_len;
2437#endif
2438
2439
2440
2441
2442struct softnet_data {
2443 struct list_head poll_list;
2444 struct sk_buff_head process_queue;
2445
2446
2447 unsigned int processed;
2448 unsigned int time_squeeze;
2449 unsigned int cpu_collision;
2450 unsigned int received_rps;
2451#ifdef CONFIG_RPS
2452 struct softnet_data *rps_ipi_list;
2453#endif
2454#ifdef CONFIG_NET_FLOW_LIMIT
2455 struct sd_flow_limit __rcu *flow_limit;
2456#endif
2457 struct Qdisc *output_queue;
2458 struct Qdisc **output_queue_tailp;
2459 struct sk_buff *completion_queue;
2460
2461#ifdef CONFIG_RPS
2462
2463 struct call_single_data csd ____cacheline_aligned_in_smp;
2464 struct softnet_data *rps_ipi_next;
2465 unsigned int cpu;
2466 unsigned int input_queue_head;
2467 unsigned int input_queue_tail;
2468#endif
2469 unsigned int dropped;
2470 struct sk_buff_head input_pkt_queue;
2471 struct napi_struct backlog;
2472
2473};
2474
2475static inline void input_queue_head_incr(struct softnet_data *sd)
2476{
2477#ifdef CONFIG_RPS
2478 sd->input_queue_head++;
2479#endif
2480}
2481
2482static inline void input_queue_tail_incr_save(struct softnet_data *sd,
2483 unsigned int *qtail)
2484{
2485#ifdef CONFIG_RPS
2486 *qtail = ++sd->input_queue_tail;
2487#endif
2488}
2489
2490DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
2491
2492void __netif_schedule(struct Qdisc *q);
2493void netif_schedule_queue(struct netdev_queue *txq);
2494
2495static inline void netif_tx_schedule_all(struct net_device *dev)
2496{
2497 unsigned int i;
2498
2499 for (i = 0; i < dev->num_tx_queues; i++)
2500 netif_schedule_queue(netdev_get_tx_queue(dev, i));
2501}
2502
2503static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
2504{
2505 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2506}
2507
2508
2509
2510
2511
2512
2513
2514static inline void netif_start_queue(struct net_device *dev)
2515{
2516 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
2517}
2518
2519static inline void netif_tx_start_all_queues(struct net_device *dev)
2520{
2521 unsigned int i;
2522
2523 for (i = 0; i < dev->num_tx_queues; i++) {
2524 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2525 netif_tx_start_queue(txq);
2526 }
2527}
2528
2529void netif_tx_wake_queue(struct netdev_queue *dev_queue);
2530
2531
2532
2533
2534
2535
2536
2537
2538static inline void netif_wake_queue(struct net_device *dev)
2539{
2540 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
2541}
2542
2543static inline void netif_tx_wake_all_queues(struct net_device *dev)
2544{
2545 unsigned int i;
2546
2547 for (i = 0; i < dev->num_tx_queues; i++) {
2548 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2549 netif_tx_wake_queue(txq);
2550 }
2551}
2552
2553static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
2554{
2555 if (WARN_ON(!dev_queue)) {
2556 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
2557 return;
2558 }
2559 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2560}
2561
2562
2563
2564
2565
2566
2567
2568
2569static inline void netif_stop_queue(struct net_device *dev)
2570{
2571 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
2572}
2573
2574static inline void netif_tx_stop_all_queues(struct net_device *dev)
2575{
2576 unsigned int i;
2577
2578 for (i = 0; i < dev->num_tx_queues; i++) {
2579 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2580 netif_tx_stop_queue(txq);
2581 }
2582}
2583
2584static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
2585{
2586 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2587}
2588
2589
2590
2591
2592
2593
2594
2595static inline bool netif_queue_stopped(const struct net_device *dev)
2596{
2597 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
2598}
2599
2600static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
2601{
2602 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
2603}
2604
2605static inline bool
2606netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
2607{
2608 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
2609}
2610
2611static inline bool
2612netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
2613{
2614 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
2615}
2616
2617
2618
2619
2620
2621
2622
2623
2624static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
2625{
2626#ifdef CONFIG_BQL
2627 prefetchw(&dev_queue->dql.num_queued);
2628#endif
2629}
2630
2631
2632
2633
2634
2635
2636
2637
2638static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
2639{
2640#ifdef CONFIG_BQL
2641 prefetchw(&dev_queue->dql.limit);
2642#endif
2643}
2644
2645static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
2646 unsigned int bytes)
2647{
2648#ifdef CONFIG_BQL
2649 dql_queued(&dev_queue->dql, bytes);
2650
2651 if (likely(dql_avail(&dev_queue->dql) >= 0))
2652 return;
2653
2654 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
2655
2656
2657
2658
2659
2660
2661 smp_mb();
2662
2663
2664 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
2665 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
2666#endif
2667}
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
2679{
2680 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
2681}
2682
2683static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
2684 unsigned int pkts, unsigned int bytes)
2685{
2686#ifdef CONFIG_BQL
2687 if (unlikely(!bytes))
2688 return;
2689
2690 dql_completed(&dev_queue->dql, bytes);
2691
2692
2693
2694
2695
2696
2697 smp_mb();
2698
2699 if (dql_avail(&dev_queue->dql) < 0)
2700 return;
2701
2702 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
2703 netif_schedule_queue(dev_queue);
2704#endif
2705}
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717static inline void netdev_completed_queue(struct net_device *dev,
2718 unsigned int pkts, unsigned int bytes)
2719{
2720 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
2721}
2722
2723static inline void netdev_tx_reset_queue(struct netdev_queue *q)
2724{
2725#ifdef CONFIG_BQL
2726 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
2727 dql_reset(&q->dql);
2728#endif
2729}
2730
2731
2732
2733
2734
2735
2736
2737
2738static inline void netdev_reset_queue(struct net_device *dev_queue)
2739{
2740 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
2741}
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
2752{
2753 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
2754 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
2755 dev->name, queue_index,
2756 dev->real_num_tx_queues);
2757 return 0;
2758 }
2759
2760 return queue_index;
2761}
2762
2763
2764
2765
2766
2767
2768
2769static inline bool netif_running(const struct net_device *dev)
2770{
2771 return test_bit(__LINK_STATE_START, &dev->state);
2772}
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
2789{
2790 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2791
2792 netif_tx_start_queue(txq);
2793}
2794
2795
2796
2797
2798
2799
2800
2801
2802static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
2803{
2804 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2805 netif_tx_stop_queue(txq);
2806}
2807
2808
2809
2810
2811
2812
2813
2814
2815static inline bool __netif_subqueue_stopped(const struct net_device *dev,
2816 u16 queue_index)
2817{
2818 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2819
2820 return netif_tx_queue_stopped(txq);
2821}
2822
2823static inline bool netif_subqueue_stopped(const struct net_device *dev,
2824 struct sk_buff *skb)
2825{
2826 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
2827}
2828
2829void netif_wake_subqueue(struct net_device *dev, u16 queue_index);
2830
2831#ifdef CONFIG_XPS
2832int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
2833 u16 index);
2834#else
2835static inline int netif_set_xps_queue(struct net_device *dev,
2836 const struct cpumask *mask,
2837 u16 index)
2838{
2839 return 0;
2840}
2841#endif
2842
2843
2844
2845
2846
2847static inline u16 skb_tx_hash(const struct net_device *dev,
2848 struct sk_buff *skb)
2849{
2850 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
2851}
2852
2853
2854
2855
2856
2857
2858
2859static inline bool netif_is_multiqueue(const struct net_device *dev)
2860{
2861 return dev->num_tx_queues > 1;
2862}
2863
2864int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
2865
2866#ifdef CONFIG_SYSFS
2867int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
2868#else
2869static inline int netif_set_real_num_rx_queues(struct net_device *dev,
2870 unsigned int rxq)
2871{
2872 return 0;
2873}
2874#endif
2875
2876#ifdef CONFIG_SYSFS
2877static inline unsigned int get_netdev_rx_queue_index(
2878 struct netdev_rx_queue *queue)
2879{
2880 struct net_device *dev = queue->dev;
2881 int index = queue - dev->_rx;
2882
2883 BUG_ON(index >= dev->num_rx_queues);
2884 return index;
2885}
2886#endif
2887
2888#define DEFAULT_MAX_NUM_RSS_QUEUES (8)
2889int netif_get_num_default_rss_queues(void);
2890
2891enum skb_free_reason {
2892 SKB_REASON_CONSUMED,
2893 SKB_REASON_DROPPED,
2894};
2895
2896void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
2897void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918static inline void dev_kfree_skb_irq(struct sk_buff *skb)
2919{
2920 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
2921}
2922
2923static inline void dev_consume_skb_irq(struct sk_buff *skb)
2924{
2925 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
2926}
2927
2928static inline void dev_kfree_skb_any(struct sk_buff *skb)
2929{
2930 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
2931}
2932
2933static inline void dev_consume_skb_any(struct sk_buff *skb)
2934{
2935 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
2936}
2937
2938int netif_rx(struct sk_buff *skb);
2939int netif_rx_ni(struct sk_buff *skb);
2940int netif_receive_skb_sk(struct sock *sk, struct sk_buff *skb);
2941static inline int netif_receive_skb(struct sk_buff *skb)
2942{
2943 return netif_receive_skb_sk(skb->sk, skb);
2944}
2945gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
2946void napi_gro_flush(struct napi_struct *napi, bool flush_old);
2947struct sk_buff *napi_get_frags(struct napi_struct *napi);
2948gro_result_t napi_gro_frags(struct napi_struct *napi);
2949struct packet_offload *gro_find_receive_by_type(__be16 type);
2950struct packet_offload *gro_find_complete_by_type(__be16 type);
2951
2952static inline void napi_free_frags(struct napi_struct *napi)
2953{
2954 kfree_skb(napi->skb);
2955 napi->skb = NULL;
2956}
2957
2958int netdev_rx_handler_register(struct net_device *dev,
2959 rx_handler_func_t *rx_handler,
2960 void *rx_handler_data);
2961void netdev_rx_handler_unregister(struct net_device *dev);
2962
2963bool dev_valid_name(const char *name);
2964int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
2965int dev_ethtool(struct net *net, struct ifreq *);
2966unsigned int dev_get_flags(const struct net_device *);
2967int __dev_change_flags(struct net_device *, unsigned int flags);
2968int dev_change_flags(struct net_device *, unsigned int);
2969void __dev_notify_flags(struct net_device *, unsigned int old_flags,
2970 unsigned int gchanges);
2971int dev_change_name(struct net_device *, const char *);
2972int dev_set_alias(struct net_device *, const char *, size_t);
2973int dev_change_net_namespace(struct net_device *, struct net *, const char *);
2974int dev_set_mtu(struct net_device *, int);
2975void dev_set_group(struct net_device *, int);
2976int dev_set_mac_address(struct net_device *, struct sockaddr *);
2977int dev_change_carrier(struct net_device *, bool new_carrier);
2978int dev_get_phys_port_id(struct net_device *dev,
2979 struct netdev_phys_item_id *ppid);
2980int dev_get_phys_port_name(struct net_device *dev,
2981 char *name, size_t len);
2982struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev);
2983struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
2984 struct netdev_queue *txq, int *ret);
2985int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
2986int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
2987bool is_skb_forwardable(struct net_device *dev, struct sk_buff *skb);
2988
2989extern int netdev_budget;
2990
2991
2992void netdev_run_todo(void);
2993
2994
2995
2996
2997
2998
2999
3000static inline void dev_put(struct net_device *dev)
3001{
3002 this_cpu_dec(*dev->pcpu_refcnt);
3003}
3004
3005
3006
3007
3008
3009
3010
3011static inline void dev_hold(struct net_device *dev)
3012{
3013 this_cpu_inc(*dev->pcpu_refcnt);
3014}
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025void linkwatch_init_dev(struct net_device *dev);
3026void linkwatch_fire_event(struct net_device *dev);
3027void linkwatch_forget_dev(struct net_device *dev);
3028
3029
3030
3031
3032
3033
3034
3035static inline bool netif_carrier_ok(const struct net_device *dev)
3036{
3037 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3038}
3039
3040unsigned long dev_trans_start(struct net_device *dev);
3041
3042void __netdev_watchdog_up(struct net_device *dev);
3043
3044void netif_carrier_on(struct net_device *dev);
3045
3046void netif_carrier_off(struct net_device *dev);
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061static inline void netif_dormant_on(struct net_device *dev)
3062{
3063 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3064 linkwatch_fire_event(dev);
3065}
3066
3067
3068
3069
3070
3071
3072
3073static inline void netif_dormant_off(struct net_device *dev)
3074{
3075 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3076 linkwatch_fire_event(dev);
3077}
3078
3079
3080
3081
3082
3083
3084
3085static inline bool netif_dormant(const struct net_device *dev)
3086{
3087 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3088}
3089
3090
3091
3092
3093
3094
3095
3096
3097static inline bool netif_oper_up(const struct net_device *dev)
3098{
3099 return (dev->operstate == IF_OPER_UP ||
3100 dev->operstate == IF_OPER_UNKNOWN );
3101}
3102
3103
3104
3105
3106
3107
3108
3109static inline bool netif_device_present(struct net_device *dev)
3110{
3111 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3112}
3113
3114void netif_device_detach(struct net_device *dev);
3115
3116void netif_device_attach(struct net_device *dev);
3117
3118
3119
3120
3121
3122enum {
3123 NETIF_MSG_DRV = 0x0001,
3124 NETIF_MSG_PROBE = 0x0002,
3125 NETIF_MSG_LINK = 0x0004,
3126 NETIF_MSG_TIMER = 0x0008,
3127 NETIF_MSG_IFDOWN = 0x0010,
3128 NETIF_MSG_IFUP = 0x0020,
3129 NETIF_MSG_RX_ERR = 0x0040,
3130 NETIF_MSG_TX_ERR = 0x0080,
3131 NETIF_MSG_TX_QUEUED = 0x0100,
3132 NETIF_MSG_INTR = 0x0200,
3133 NETIF_MSG_TX_DONE = 0x0400,
3134 NETIF_MSG_RX_STATUS = 0x0800,
3135 NETIF_MSG_PKTDATA = 0x1000,
3136 NETIF_MSG_HW = 0x2000,
3137 NETIF_MSG_WOL = 0x4000,
3138};
3139
3140#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3141#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3142#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3143#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3144#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3145#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3146#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3147#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3148#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3149#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3150#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3151#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3152#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3153#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3154#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3155
3156static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3157{
3158
3159 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3160 return default_msg_enable_bits;
3161 if (debug_value == 0)
3162 return 0;
3163
3164 return (1 << debug_value) - 1;
3165}
3166
3167static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
3168{
3169 spin_lock(&txq->_xmit_lock);
3170 txq->xmit_lock_owner = cpu;
3171}
3172
3173static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
3174{
3175 spin_lock_bh(&txq->_xmit_lock);
3176 txq->xmit_lock_owner = smp_processor_id();
3177}
3178
3179static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3180{
3181 bool ok = spin_trylock(&txq->_xmit_lock);
3182 if (likely(ok))
3183 txq->xmit_lock_owner = smp_processor_id();
3184 return ok;
3185}
3186
3187static inline void __netif_tx_unlock(struct netdev_queue *txq)
3188{
3189 txq->xmit_lock_owner = -1;
3190 spin_unlock(&txq->_xmit_lock);
3191}
3192
3193static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
3194{
3195 txq->xmit_lock_owner = -1;
3196 spin_unlock_bh(&txq->_xmit_lock);
3197}
3198
3199static inline void txq_trans_update(struct netdev_queue *txq)
3200{
3201 if (txq->xmit_lock_owner != -1)
3202 txq->trans_start = jiffies;
3203}
3204
3205
3206
3207
3208
3209
3210
3211static inline void netif_tx_lock(struct net_device *dev)
3212{
3213 unsigned int i;
3214 int cpu;
3215
3216 spin_lock(&dev->tx_global_lock);
3217 cpu = smp_processor_id();
3218 for (i = 0; i < dev->num_tx_queues; i++) {
3219 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3220
3221
3222
3223
3224
3225
3226
3227 __netif_tx_lock(txq, cpu);
3228 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
3229 __netif_tx_unlock(txq);
3230 }
3231}
3232
3233static inline void netif_tx_lock_bh(struct net_device *dev)
3234{
3235 local_bh_disable();
3236 netif_tx_lock(dev);
3237}
3238
3239static inline void netif_tx_unlock(struct net_device *dev)
3240{
3241 unsigned int i;
3242
3243 for (i = 0; i < dev->num_tx_queues; i++) {
3244 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3245
3246
3247
3248
3249
3250 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
3251 netif_schedule_queue(txq);
3252 }
3253 spin_unlock(&dev->tx_global_lock);
3254}
3255
3256static inline void netif_tx_unlock_bh(struct net_device *dev)
3257{
3258 netif_tx_unlock(dev);
3259 local_bh_enable();
3260}
3261
3262#define HARD_TX_LOCK(dev, txq, cpu) { \
3263 if ((dev->features & NETIF_F_LLTX) == 0) { \
3264 __netif_tx_lock(txq, cpu); \
3265 } \
3266}
3267
3268#define HARD_TX_TRYLOCK(dev, txq) \
3269 (((dev->features & NETIF_F_LLTX) == 0) ? \
3270 __netif_tx_trylock(txq) : \
3271 true )
3272
3273#define HARD_TX_UNLOCK(dev, txq) { \
3274 if ((dev->features & NETIF_F_LLTX) == 0) { \
3275 __netif_tx_unlock(txq); \
3276 } \
3277}
3278
3279static inline void netif_tx_disable(struct net_device *dev)
3280{
3281 unsigned int i;
3282 int cpu;
3283
3284 local_bh_disable();
3285 cpu = smp_processor_id();
3286 for (i = 0; i < dev->num_tx_queues; i++) {
3287 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3288
3289 __netif_tx_lock(txq, cpu);
3290 netif_tx_stop_queue(txq);
3291 __netif_tx_unlock(txq);
3292 }
3293 local_bh_enable();
3294}
3295
3296static inline void netif_addr_lock(struct net_device *dev)
3297{
3298 spin_lock(&dev->addr_list_lock);
3299}
3300
3301static inline void netif_addr_lock_nested(struct net_device *dev)
3302{
3303 int subclass = SINGLE_DEPTH_NESTING;
3304
3305 if (dev->netdev_ops->ndo_get_lock_subclass)
3306 subclass = dev->netdev_ops->ndo_get_lock_subclass(dev);
3307
3308 spin_lock_nested(&dev->addr_list_lock, subclass);
3309}
3310
3311static inline void netif_addr_lock_bh(struct net_device *dev)
3312{
3313 spin_lock_bh(&dev->addr_list_lock);
3314}
3315
3316static inline void netif_addr_unlock(struct net_device *dev)
3317{
3318 spin_unlock(&dev->addr_list_lock);
3319}
3320
3321static inline void netif_addr_unlock_bh(struct net_device *dev)
3322{
3323 spin_unlock_bh(&dev->addr_list_lock);
3324}
3325
3326
3327
3328
3329
3330#define for_each_dev_addr(dev, ha) \
3331 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
3332
3333
3334
3335void ether_setup(struct net_device *dev);
3336
3337
3338struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
3339 unsigned char name_assign_type,
3340 void (*setup)(struct net_device *),
3341 unsigned int txqs, unsigned int rxqs);
3342#define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
3343 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
3344
3345#define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
3346 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
3347 count)
3348
3349int register_netdev(struct net_device *dev);
3350void unregister_netdev(struct net_device *dev);
3351
3352
3353int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
3354 struct netdev_hw_addr_list *from_list, int addr_len);
3355void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
3356 struct netdev_hw_addr_list *from_list, int addr_len);
3357int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
3358 struct net_device *dev,
3359 int (*sync)(struct net_device *, const unsigned char *),
3360 int (*unsync)(struct net_device *,
3361 const unsigned char *));
3362void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
3363 struct net_device *dev,
3364 int (*unsync)(struct net_device *,
3365 const unsigned char *));
3366void __hw_addr_init(struct netdev_hw_addr_list *list);
3367
3368
3369int dev_addr_add(struct net_device *dev, const unsigned char *addr,
3370 unsigned char addr_type);
3371int dev_addr_del(struct net_device *dev, const unsigned char *addr,
3372 unsigned char addr_type);
3373void dev_addr_flush(struct net_device *dev);
3374int dev_addr_init(struct net_device *dev);
3375
3376
3377int dev_uc_add(struct net_device *dev, const unsigned char *addr);
3378int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
3379int dev_uc_del(struct net_device *dev, const unsigned char *addr);
3380int dev_uc_sync(struct net_device *to, struct net_device *from);
3381int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
3382void dev_uc_unsync(struct net_device *to, struct net_device *from);
3383void dev_uc_flush(struct net_device *dev);
3384void dev_uc_init(struct net_device *dev);
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395static inline int __dev_uc_sync(struct net_device *dev,
3396 int (*sync)(struct net_device *,
3397 const unsigned char *),
3398 int (*unsync)(struct net_device *,
3399 const unsigned char *))
3400{
3401 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
3402}
3403
3404
3405
3406
3407
3408
3409
3410
3411static inline void __dev_uc_unsync(struct net_device *dev,
3412 int (*unsync)(struct net_device *,
3413 const unsigned char *))
3414{
3415 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
3416}
3417
3418
3419int dev_mc_add(struct net_device *dev, const unsigned char *addr);
3420int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
3421int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
3422int dev_mc_del(struct net_device *dev, const unsigned char *addr);
3423int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
3424int dev_mc_sync(struct net_device *to, struct net_device *from);
3425int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
3426void dev_mc_unsync(struct net_device *to, struct net_device *from);
3427void dev_mc_flush(struct net_device *dev);
3428void dev_mc_init(struct net_device *dev);
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439static inline int __dev_mc_sync(struct net_device *dev,
3440 int (*sync)(struct net_device *,
3441 const unsigned char *),
3442 int (*unsync)(struct net_device *,
3443 const unsigned char *))
3444{
3445 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
3446}
3447
3448
3449
3450
3451
3452
3453
3454
3455static inline void __dev_mc_unsync(struct net_device *dev,
3456 int (*unsync)(struct net_device *,
3457 const unsigned char *))
3458{
3459 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
3460}
3461
3462
3463void dev_set_rx_mode(struct net_device *dev);
3464void __dev_set_rx_mode(struct net_device *dev);
3465int dev_set_promiscuity(struct net_device *dev, int inc);
3466int dev_set_allmulti(struct net_device *dev, int inc);
3467void netdev_state_change(struct net_device *dev);
3468void netdev_notify_peers(struct net_device *dev);
3469void netdev_features_change(struct net_device *dev);
3470
3471void dev_load(struct net *net, const char *name);
3472struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
3473 struct rtnl_link_stats64 *storage);
3474void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
3475 const struct net_device_stats *netdev_stats);
3476
3477extern int netdev_max_backlog;
3478extern int netdev_tstamp_prequeue;
3479extern int weight_p;
3480extern int bpf_jit_enable;
3481
3482bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
3483struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
3484 struct list_head **iter);
3485struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
3486 struct list_head **iter);
3487
3488
3489#define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
3490 for (iter = &(dev)->adj_list.upper, \
3491 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
3492 updev; \
3493 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
3494
3495
3496#define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \
3497 for (iter = &(dev)->all_adj_list.upper, \
3498 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \
3499 updev; \
3500 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)))
3501
3502void *netdev_lower_get_next_private(struct net_device *dev,
3503 struct list_head **iter);
3504void *netdev_lower_get_next_private_rcu(struct net_device *dev,
3505 struct list_head **iter);
3506
3507#define netdev_for_each_lower_private(dev, priv, iter) \
3508 for (iter = (dev)->adj_list.lower.next, \
3509 priv = netdev_lower_get_next_private(dev, &(iter)); \
3510 priv; \
3511 priv = netdev_lower_get_next_private(dev, &(iter)))
3512
3513#define netdev_for_each_lower_private_rcu(dev, priv, iter) \
3514 for (iter = &(dev)->adj_list.lower, \
3515 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
3516 priv; \
3517 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
3518
3519void *netdev_lower_get_next(struct net_device *dev,
3520 struct list_head **iter);
3521#define netdev_for_each_lower_dev(dev, ldev, iter) \
3522 for (iter = &(dev)->adj_list.lower, \
3523 ldev = netdev_lower_get_next(dev, &(iter)); \
3524 ldev; \
3525 ldev = netdev_lower_get_next(dev, &(iter)))
3526
3527void *netdev_adjacent_get_private(struct list_head *adj_list);
3528void *netdev_lower_get_first_private_rcu(struct net_device *dev);
3529struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
3530struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
3531int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev);
3532int netdev_master_upper_dev_link(struct net_device *dev,
3533 struct net_device *upper_dev);
3534int netdev_master_upper_dev_link_private(struct net_device *dev,
3535 struct net_device *upper_dev,
3536 void *private);
3537void netdev_upper_dev_unlink(struct net_device *dev,
3538 struct net_device *upper_dev);
3539void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
3540void *netdev_lower_dev_get_private(struct net_device *dev,
3541 struct net_device *lower_dev);
3542
3543
3544#define NETDEV_RSS_KEY_LEN 52
3545extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN];
3546void netdev_rss_key_fill(void *buffer, size_t len);
3547
3548int dev_get_nest_level(struct net_device *dev,
3549 bool (*type_check)(struct net_device *dev));
3550int skb_checksum_help(struct sk_buff *skb);
3551struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
3552 netdev_features_t features, bool tx_path);
3553struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
3554 netdev_features_t features);
3555
3556struct netdev_bonding_info {
3557 ifslave slave;
3558 ifbond master;
3559};
3560
3561struct netdev_notifier_bonding_info {
3562 struct netdev_notifier_info info;
3563 struct netdev_bonding_info bonding_info;
3564};
3565
3566void netdev_bonding_info_change(struct net_device *dev,
3567 struct netdev_bonding_info *bonding_info);
3568
3569static inline
3570struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
3571{
3572 return __skb_gso_segment(skb, features, true);
3573}
3574__be16 skb_network_protocol(struct sk_buff *skb, int *depth);
3575
3576static inline bool can_checksum_protocol(netdev_features_t features,
3577 __be16 protocol)
3578{
3579 return ((features & NETIF_F_GEN_CSUM) ||
3580 ((features & NETIF_F_V4_CSUM) &&
3581 protocol == htons(ETH_P_IP)) ||
3582 ((features & NETIF_F_V6_CSUM) &&
3583 protocol == htons(ETH_P_IPV6)) ||
3584 ((features & NETIF_F_FCOE_CRC) &&
3585 protocol == htons(ETH_P_FCOE)));
3586}
3587
3588#ifdef CONFIG_BUG
3589void netdev_rx_csum_fault(struct net_device *dev);
3590#else
3591static inline void netdev_rx_csum_fault(struct net_device *dev)
3592{
3593}
3594#endif
3595
3596void net_enable_timestamp(void);
3597void net_disable_timestamp(void);
3598
3599#ifdef CONFIG_PROC_FS
3600int __init dev_proc_init(void);
3601#else
3602#define dev_proc_init() 0
3603#endif
3604
3605static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
3606 struct sk_buff *skb, struct net_device *dev,
3607 bool more)
3608{
3609 skb->xmit_more = more ? 1 : 0;
3610 return ops->ndo_start_xmit(skb, dev);
3611}
3612
3613static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
3614 struct netdev_queue *txq, bool more)
3615{
3616 const struct net_device_ops *ops = dev->netdev_ops;
3617 int rc;
3618
3619 rc = __netdev_start_xmit(ops, skb, dev, more);
3620 if (rc == NETDEV_TX_OK)
3621 txq_trans_update(txq);
3622
3623 return rc;
3624}
3625
3626int netdev_class_create_file_ns(struct class_attribute *class_attr,
3627 const void *ns);
3628void netdev_class_remove_file_ns(struct class_attribute *class_attr,
3629 const void *ns);
3630
3631static inline int netdev_class_create_file(struct class_attribute *class_attr)
3632{
3633 return netdev_class_create_file_ns(class_attr, NULL);
3634}
3635
3636static inline void netdev_class_remove_file(struct class_attribute *class_attr)
3637{
3638 netdev_class_remove_file_ns(class_attr, NULL);
3639}
3640
3641extern struct kobj_ns_type_operations net_ns_type_operations;
3642
3643const char *netdev_drivername(const struct net_device *dev);
3644
3645void linkwatch_run_queue(void);
3646
3647static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
3648 netdev_features_t f2)
3649{
3650 if (f1 & NETIF_F_GEN_CSUM)
3651 f1 |= (NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);
3652 if (f2 & NETIF_F_GEN_CSUM)
3653 f2 |= (NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);
3654 f1 &= f2;
3655 if (f1 & NETIF_F_GEN_CSUM)
3656 f1 &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);
3657
3658 return f1;
3659}
3660
3661static inline netdev_features_t netdev_get_wanted_features(
3662 struct net_device *dev)
3663{
3664 return (dev->features & ~dev->hw_features) | dev->wanted_features;
3665}
3666netdev_features_t netdev_increment_features(netdev_features_t all,
3667 netdev_features_t one, netdev_features_t mask);
3668
3669
3670
3671
3672
3673static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
3674 netdev_features_t mask)
3675{
3676 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
3677}
3678
3679int __netdev_update_features(struct net_device *dev);
3680void netdev_update_features(struct net_device *dev);
3681void netdev_change_features(struct net_device *dev);
3682
3683void netif_stacked_transfer_operstate(const struct net_device *rootdev,
3684 struct net_device *dev);
3685
3686netdev_features_t passthru_features_check(struct sk_buff *skb,
3687 struct net_device *dev,
3688 netdev_features_t features);
3689netdev_features_t netif_skb_features(struct sk_buff *skb);
3690
3691static inline bool net_gso_ok(netdev_features_t features, int gso_type)
3692{
3693 netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT;
3694
3695
3696 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
3697 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT));
3698 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
3699 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
3700 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
3701 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
3702 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
3703 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
3704 BUILD_BUG_ON(SKB_GSO_IPIP != (NETIF_F_GSO_IPIP >> NETIF_F_GSO_SHIFT));
3705 BUILD_BUG_ON(SKB_GSO_SIT != (NETIF_F_GSO_SIT >> NETIF_F_GSO_SHIFT));
3706 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
3707 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
3708 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
3709
3710 return (features & feature) == feature;
3711}
3712
3713static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
3714{
3715 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
3716 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
3717}
3718
3719static inline bool netif_needs_gso(struct sk_buff *skb,
3720 netdev_features_t features)
3721{
3722 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
3723 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
3724 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
3725}
3726
3727static inline void netif_set_gso_max_size(struct net_device *dev,
3728 unsigned int size)
3729{
3730 dev->gso_max_size = size;
3731}
3732
3733static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
3734 int pulled_hlen, u16 mac_offset,
3735 int mac_len)
3736{
3737 skb->protocol = protocol;
3738 skb->encapsulation = 1;
3739 skb_push(skb, pulled_hlen);
3740 skb_reset_transport_header(skb);
3741 skb->mac_header = mac_offset;
3742 skb->network_header = skb->mac_header + mac_len;
3743 skb->mac_len = mac_len;
3744}
3745
3746static inline bool netif_is_macvlan(struct net_device *dev)
3747{
3748 return dev->priv_flags & IFF_MACVLAN;
3749}
3750
3751static inline bool netif_is_macvlan_port(struct net_device *dev)
3752{
3753 return dev->priv_flags & IFF_MACVLAN_PORT;
3754}
3755
3756static inline bool netif_is_ipvlan(struct net_device *dev)
3757{
3758 return dev->priv_flags & IFF_IPVLAN_SLAVE;
3759}
3760
3761static inline bool netif_is_ipvlan_port(struct net_device *dev)
3762{
3763 return dev->priv_flags & IFF_IPVLAN_MASTER;
3764}
3765
3766static inline bool netif_is_bond_master(struct net_device *dev)
3767{
3768 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
3769}
3770
3771static inline bool netif_is_bond_slave(struct net_device *dev)
3772{
3773 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
3774}
3775
3776static inline bool netif_supports_nofcs(struct net_device *dev)
3777{
3778 return dev->priv_flags & IFF_SUPP_NOFCS;
3779}
3780
3781
3782static inline void netif_keep_dst(struct net_device *dev)
3783{
3784 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
3785}
3786
3787extern struct pernet_operations __net_initdata loopback_net_ops;
3788
3789
3790
3791
3792
3793static inline const char *netdev_name(const struct net_device *dev)
3794{
3795 if (!dev->name[0] || strchr(dev->name, '%'))
3796 return "(unnamed net_device)";
3797 return dev->name;
3798}
3799
3800static inline const char *netdev_reg_state(const struct net_device *dev)
3801{
3802 switch (dev->reg_state) {
3803 case NETREG_UNINITIALIZED: return " (uninitialized)";
3804 case NETREG_REGISTERED: return "";
3805 case NETREG_UNREGISTERING: return " (unregistering)";
3806 case NETREG_UNREGISTERED: return " (unregistered)";
3807 case NETREG_RELEASED: return " (released)";
3808 case NETREG_DUMMY: return " (dummy)";
3809 }
3810
3811 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
3812 return " (unknown)";
3813}
3814
3815__printf(3, 4)
3816void netdev_printk(const char *level, const struct net_device *dev,
3817 const char *format, ...);
3818__printf(2, 3)
3819void netdev_emerg(const struct net_device *dev, const char *format, ...);
3820__printf(2, 3)
3821void netdev_alert(const struct net_device *dev, const char *format, ...);
3822__printf(2, 3)
3823void netdev_crit(const struct net_device *dev, const char *format, ...);
3824__printf(2, 3)
3825void netdev_err(const struct net_device *dev, const char *format, ...);
3826__printf(2, 3)
3827void netdev_warn(const struct net_device *dev, const char *format, ...);
3828__printf(2, 3)
3829void netdev_notice(const struct net_device *dev, const char *format, ...);
3830__printf(2, 3)
3831void netdev_info(const struct net_device *dev, const char *format, ...);
3832
3833#define MODULE_ALIAS_NETDEV(device) \
3834 MODULE_ALIAS("netdev-" device)
3835
3836#if defined(CONFIG_DYNAMIC_DEBUG)
3837#define netdev_dbg(__dev, format, args...) \
3838do { \
3839 dynamic_netdev_dbg(__dev, format, ##args); \
3840} while (0)
3841#elif defined(DEBUG)
3842#define netdev_dbg(__dev, format, args...) \
3843 netdev_printk(KERN_DEBUG, __dev, format, ##args)
3844#else
3845#define netdev_dbg(__dev, format, args...) \
3846({ \
3847 if (0) \
3848 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
3849})
3850#endif
3851
3852#if defined(VERBOSE_DEBUG)
3853#define netdev_vdbg netdev_dbg
3854#else
3855
3856#define netdev_vdbg(dev, format, args...) \
3857({ \
3858 if (0) \
3859 netdev_printk(KERN_DEBUG, dev, format, ##args); \
3860 0; \
3861})
3862#endif
3863
3864
3865
3866
3867
3868
3869#define netdev_WARN(dev, format, args...) \
3870 WARN(1, "netdevice: %s%s\n" format, netdev_name(dev), \
3871 netdev_reg_state(dev), ##args)
3872
3873
3874
3875#define netif_printk(priv, type, level, dev, fmt, args...) \
3876do { \
3877 if (netif_msg_##type(priv)) \
3878 netdev_printk(level, (dev), fmt, ##args); \
3879} while (0)
3880
3881#define netif_level(level, priv, type, dev, fmt, args...) \
3882do { \
3883 if (netif_msg_##type(priv)) \
3884 netdev_##level(dev, fmt, ##args); \
3885} while (0)
3886
3887#define netif_emerg(priv, type, dev, fmt, args...) \
3888 netif_level(emerg, priv, type, dev, fmt, ##args)
3889#define netif_alert(priv, type, dev, fmt, args...) \
3890 netif_level(alert, priv, type, dev, fmt, ##args)
3891#define netif_crit(priv, type, dev, fmt, args...) \
3892 netif_level(crit, priv, type, dev, fmt, ##args)
3893#define netif_err(priv, type, dev, fmt, args...) \
3894 netif_level(err, priv, type, dev, fmt, ##args)
3895#define netif_warn(priv, type, dev, fmt, args...) \
3896 netif_level(warn, priv, type, dev, fmt, ##args)
3897#define netif_notice(priv, type, dev, fmt, args...) \
3898 netif_level(notice, priv, type, dev, fmt, ##args)
3899#define netif_info(priv, type, dev, fmt, args...) \
3900 netif_level(info, priv, type, dev, fmt, ##args)
3901
3902#if defined(CONFIG_DYNAMIC_DEBUG)
3903#define netif_dbg(priv, type, netdev, format, args...) \
3904do { \
3905 if (netif_msg_##type(priv)) \
3906 dynamic_netdev_dbg(netdev, format, ##args); \
3907} while (0)
3908#elif defined(DEBUG)
3909#define netif_dbg(priv, type, dev, format, args...) \
3910 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
3911#else
3912#define netif_dbg(priv, type, dev, format, args...) \
3913({ \
3914 if (0) \
3915 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
3916 0; \
3917})
3918#endif
3919
3920#if defined(VERBOSE_DEBUG)
3921#define netif_vdbg netif_dbg
3922#else
3923#define netif_vdbg(priv, type, dev, format, args...) \
3924({ \
3925 if (0) \
3926 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
3927 0; \
3928})
3929#endif
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958#define PTYPE_HASH_SIZE (16)
3959#define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
3960
3961#endif
3962