team: implement carrier change
[deliverable/linux.git] / include / linux / netdevice.h
CommitLineData
1da177e4
LT
1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Definitions for the Interfaces handler.
7 *
8 * Version: @(#)dev.h 1.0.10 08/12/93
9 *
02c30a84 10 * Authors: Ross Biro
1da177e4
LT
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
113aa838 14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
1da177e4
LT
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
17 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
22 *
23 * Moved to /usr/include/linux for NET3
24 */
25#ifndef _LINUX_NETDEVICE_H
26#define _LINUX_NETDEVICE_H
27
e8db0be1 28#include <linux/pm_qos.h>
d7fe0f24 29#include <linux/timer.h>
187f1882 30#include <linux/bug.h>
bea3348e 31#include <linux/delay.h>
60063497 32#include <linux/atomic.h>
1da177e4
LT
33#include <asm/cache.h>
34#include <asm/byteorder.h>
35
1da177e4 36#include <linux/percpu.h>
4d5b78c0 37#include <linux/rculist.h>
db217334 38#include <linux/dmaengine.h>
bea3348e 39#include <linux/workqueue.h>
114cf580 40#include <linux/dynamic_queue_limits.h>
1da177e4 41
b1b67dd4 42#include <linux/ethtool.h>
a050c33f 43#include <net/net_namespace.h>
cf85d08f 44#include <net/dsa.h>
7a6b6f51 45#ifdef CONFIG_DCB
2f90b865
AD
46#include <net/dcbnl.h>
47#endif
5bc1421e 48#include <net/netprio_cgroup.h>
a050c33f 49
a59e2ecb 50#include <linux/netdev_features.h>
77162022 51#include <linux/neighbour.h>
607ca46e 52#include <uapi/linux/netdevice.h>
a59e2ecb 53
115c1d6e 54struct netpoll_info;
313162d0 55struct device;
c1f19b51 56struct phy_device;
704232c2
JB
57/* 802.11 specific */
58struct wireless_dev;
1da177e4
LT
59 /* source back-compat hooks */
60#define SET_ETHTOOL_OPS(netdev,ops) \
61 ( (netdev)->ethtool_ops = (ops) )
62
c1f79426
SA
63/* hardware address assignment types */
64#define NET_ADDR_PERM 0 /* address is permanent (default) */
65#define NET_ADDR_RANDOM 1 /* address is generated randomly */
66#define NET_ADDR_STOLEN 2 /* address is stolen from other device */
67
9a1654ba
JP
68/* Backlog congestion levels */
69#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
70#define NET_RX_DROP 1 /* packet dropped */
71
572a9d7b
PM
72/*
73 * Transmit return codes: transmit return codes originate from three different
74 * namespaces:
75 *
76 * - qdisc return codes
77 * - driver transmit return codes
78 * - errno values
79 *
80 * Drivers are allowed to return any one of those in their hard_start_xmit()
81 * function. Real network devices commonly used with qdiscs should only return
82 * the driver transmit return codes though - when qdiscs are used, the actual
83 * transmission happens asynchronously, so the value is not propagated to
84 * higher layers. Virtual network devices transmit synchronously, in this case
85 * the driver transmit return codes are consumed by dev_queue_xmit(), all
86 * others are propagated to higher layers.
87 */
88
89/* qdisc ->enqueue() return codes. */
90#define NET_XMIT_SUCCESS 0x00
9a1654ba
JP
91#define NET_XMIT_DROP 0x01 /* skb dropped */
92#define NET_XMIT_CN 0x02 /* congestion notification */
93#define NET_XMIT_POLICED 0x03 /* skb is shot by police */
94#define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
1da177e4 95
b9df3cb8
GR
96/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
97 * indicates that the device will soon be dropping packets, or already drops
98 * some packets of the same priority; prompting us to send less aggressively. */
572a9d7b 99#define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
1da177e4
LT
100#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
101
dc1f8bf6 102/* Driver transmit return codes */
9a1654ba 103#define NETDEV_TX_MASK 0xf0
572a9d7b 104
dc1f8bf6 105enum netdev_tx {
572a9d7b 106 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
9a1654ba
JP
107 NETDEV_TX_OK = 0x00, /* driver took care of packet */
108 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
109 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
dc1f8bf6
SH
110};
111typedef enum netdev_tx netdev_tx_t;
112
9a1654ba
JP
113/*
114 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
115 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
116 */
117static inline bool dev_xmit_complete(int rc)
118{
119 /*
120 * Positive cases with an skb consumed by a driver:
121 * - successful transmission (rc == NETDEV_TX_OK)
122 * - error while transmitting (rc < 0)
123 * - error while queueing to a different device (rc & NET_XMIT_MASK)
124 */
125 if (likely(rc < NET_XMIT_MASK))
126 return true;
127
128 return false;
129}
130
1da177e4
LT
131/*
132 * Compute the worst case header length according to the protocols
133 * used.
134 */
fe2918b0 135
d11ead75 136#if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
8388e3da
DM
137# if defined(CONFIG_MAC80211_MESH)
138# define LL_MAX_HEADER 128
139# else
140# define LL_MAX_HEADER 96
141# endif
d11ead75 142#elif IS_ENABLED(CONFIG_TR)
8388e3da 143# define LL_MAX_HEADER 48
1da177e4 144#else
8388e3da 145# define LL_MAX_HEADER 32
1da177e4
LT
146#endif
147
d11ead75
BH
148#if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
149 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
1da177e4
LT
150#define MAX_HEADER LL_MAX_HEADER
151#else
152#define MAX_HEADER (LL_MAX_HEADER + 48)
153#endif
154
155/*
be1f3c2c
BH
156 * Old network device statistics. Fields are native words
157 * (unsigned long) so they can be read and written atomically.
1da177e4 158 */
fe2918b0 159
d94d9fee 160struct net_device_stats {
3cfde79c
BH
161 unsigned long rx_packets;
162 unsigned long tx_packets;
163 unsigned long rx_bytes;
164 unsigned long tx_bytes;
165 unsigned long rx_errors;
166 unsigned long tx_errors;
167 unsigned long rx_dropped;
168 unsigned long tx_dropped;
169 unsigned long multicast;
1da177e4 170 unsigned long collisions;
1da177e4 171 unsigned long rx_length_errors;
3cfde79c
BH
172 unsigned long rx_over_errors;
173 unsigned long rx_crc_errors;
174 unsigned long rx_frame_errors;
175 unsigned long rx_fifo_errors;
176 unsigned long rx_missed_errors;
1da177e4
LT
177 unsigned long tx_aborted_errors;
178 unsigned long tx_carrier_errors;
179 unsigned long tx_fifo_errors;
180 unsigned long tx_heartbeat_errors;
181 unsigned long tx_window_errors;
1da177e4
LT
182 unsigned long rx_compressed;
183 unsigned long tx_compressed;
184};
185
1da177e4
LT
186
187#include <linux/cache.h>
188#include <linux/skbuff.h>
189
adc9300e 190#ifdef CONFIG_RPS
c5905afb
IM
191#include <linux/static_key.h>
192extern struct static_key rps_needed;
adc9300e
ED
193#endif
194
1da177e4
LT
195struct neighbour;
196struct neigh_parms;
197struct sk_buff;
198
f001fde5
JP
199struct netdev_hw_addr {
200 struct list_head list;
201 unsigned char addr[MAX_ADDR_LEN];
202 unsigned char type;
ccffad25
JP
203#define NETDEV_HW_ADDR_T_LAN 1
204#define NETDEV_HW_ADDR_T_SAN 2
205#define NETDEV_HW_ADDR_T_SLAVE 3
206#define NETDEV_HW_ADDR_T_UNICAST 4
22bedad3 207#define NETDEV_HW_ADDR_T_MULTICAST 5
ccffad25 208 bool synced;
22bedad3 209 bool global_use;
8f8f103d 210 int refcount;
f001fde5
JP
211 struct rcu_head rcu_head;
212};
213
31278e71
JP
214struct netdev_hw_addr_list {
215 struct list_head list;
216 int count;
217};
218
22bedad3
JP
219#define netdev_hw_addr_list_count(l) ((l)->count)
220#define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
221#define netdev_hw_addr_list_for_each(ha, l) \
222 list_for_each_entry(ha, &(l)->list, list)
32e7bfc4 223
22bedad3
JP
224#define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
225#define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
226#define netdev_for_each_uc_addr(ha, dev) \
227 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
6683ece3 228
22bedad3
JP
229#define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
230#define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
18e225f2 231#define netdev_for_each_mc_addr(ha, dev) \
22bedad3 232 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
6683ece3 233
d94d9fee 234struct hh_cache {
f6b72b62 235 u16 hh_len;
5c25f686 236 u16 __pad;
3644f0ce 237 seqlock_t hh_lock;
1da177e4
LT
238
239 /* cached hardware header; allow for machine alignment needs. */
240#define HH_DATA_MOD 16
241#define HH_DATA_OFF(__len) \
5ba0eac6 242 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
1da177e4
LT
243#define HH_DATA_ALIGN(__len) \
244 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
245 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
246};
247
248/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
249 * Alternative is:
250 * dev->hard_header_len ? (dev->hard_header_len +
251 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
252 *
253 * We could use other alignment values, but we must maintain the
254 * relationship HH alignment <= LL alignment.
255 */
256#define LL_RESERVED_SPACE(dev) \
f5184d26 257 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
1da177e4 258#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
f5184d26 259 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
1da177e4 260
3b04ddde
SH
261struct header_ops {
262 int (*create) (struct sk_buff *skb, struct net_device *dev,
263 unsigned short type, const void *daddr,
95c96174 264 const void *saddr, unsigned int len);
3b04ddde
SH
265 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
266 int (*rebuild)(struct sk_buff *skb);
e69dd336 267 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
3b04ddde
SH
268 void (*cache_update)(struct hh_cache *hh,
269 const struct net_device *dev,
270 const unsigned char *haddr);
271};
272
1da177e4
LT
273/* These flag bits are private to the generic network queueing
274 * layer, they may not be explicitly referenced by any other
275 * code.
276 */
277
d94d9fee 278enum netdev_state_t {
1da177e4
LT
279 __LINK_STATE_START,
280 __LINK_STATE_PRESENT,
1da177e4 281 __LINK_STATE_NOCARRIER,
b00055aa
SR
282 __LINK_STATE_LINKWATCH_PENDING,
283 __LINK_STATE_DORMANT,
1da177e4
LT
284};
285
286
287/*
288 * This structure holds at boot time configured netdevice settings. They
fe2918b0 289 * are then used in the device probing.
1da177e4
LT
290 */
291struct netdev_boot_setup {
292 char name[IFNAMSIZ];
293 struct ifmap map;
294};
295#define NETDEV_BOOT_SETUP_MAX 8
296
20380731 297extern int __init netdev_boot_setup(char *str);
1da177e4 298
bea3348e
SH
299/*
300 * Structure for NAPI scheduling similar to tasklet but with weighting
301 */
302struct napi_struct {
303 /* The poll_list must only be managed by the entity which
304 * changes the state of the NAPI_STATE_SCHED bit. This means
305 * whoever atomically sets that bit can add this napi_struct
306 * to the per-cpu poll_list, and whoever clears that bit
307 * can remove from the list right before clearing the bit.
308 */
309 struct list_head poll_list;
310
311 unsigned long state;
312 int weight;
404f7c9e 313 unsigned int gro_count;
bea3348e
SH
314 int (*poll)(struct napi_struct *, int);
315#ifdef CONFIG_NETPOLL
316 spinlock_t poll_lock;
317 int poll_owner;
bea3348e 318#endif
5d38a079 319 struct net_device *dev;
d565b0a1 320 struct sk_buff *gro_list;
5d38a079 321 struct sk_buff *skb;
404f7c9e 322 struct list_head dev_list;
bea3348e
SH
323};
324
d94d9fee 325enum {
bea3348e 326 NAPI_STATE_SCHED, /* Poll is scheduled */
a0a46196 327 NAPI_STATE_DISABLE, /* Disable pending */
7b363e44 328 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
bea3348e
SH
329};
330
5b252f0c 331enum gro_result {
d1c76af9
HX
332 GRO_MERGED,
333 GRO_MERGED_FREE,
334 GRO_HELD,
335 GRO_NORMAL,
336 GRO_DROP,
337};
5b252f0c 338typedef enum gro_result gro_result_t;
d1c76af9 339
8a4eb573
JP
340/*
341 * enum rx_handler_result - Possible return values for rx_handlers.
342 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
343 * further.
344 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
345 * case skb->dev was changed by rx_handler.
346 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
347 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
348 *
349 * rx_handlers are functions called from inside __netif_receive_skb(), to do
350 * special processing of the skb, prior to delivery to protocol handlers.
351 *
352 * Currently, a net_device can only have a single rx_handler registered. Trying
353 * to register a second rx_handler will return -EBUSY.
354 *
355 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
356 * To unregister a rx_handler on a net_device, use
357 * netdev_rx_handler_unregister().
358 *
359 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
360 * do with the skb.
361 *
362 * If the rx_handler consumed to skb in some way, it should return
363 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
364 * the skb to be delivered in some other ways.
365 *
366 * If the rx_handler changed skb->dev, to divert the skb to another
367 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
368 * new device will be called if it exists.
369 *
370 * If the rx_handler consider the skb should be ignored, it should return
371 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
d93cf068 372 * are registered on exact device (ptype->dev == skb->dev).
8a4eb573
JP
373 *
374 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
375 * delivered, it should return RX_HANDLER_PASS.
376 *
377 * A device without a registered rx_handler will behave as if rx_handler
378 * returned RX_HANDLER_PASS.
379 */
380
381enum rx_handler_result {
382 RX_HANDLER_CONSUMED,
383 RX_HANDLER_ANOTHER,
384 RX_HANDLER_EXACT,
385 RX_HANDLER_PASS,
386};
387typedef enum rx_handler_result rx_handler_result_t;
388typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
ab95bfe0 389
b3c97528 390extern void __napi_schedule(struct napi_struct *n);
bea3348e 391
4d29515f 392static inline bool napi_disable_pending(struct napi_struct *n)
a0a46196
DM
393{
394 return test_bit(NAPI_STATE_DISABLE, &n->state);
395}
396
bea3348e
SH
397/**
398 * napi_schedule_prep - check if napi can be scheduled
399 * @n: napi context
400 *
401 * Test if NAPI routine is already running, and if not mark
402 * it as running. This is used as a condition variable
a0a46196
DM
403 * insure only one NAPI poll instance runs. We also make
404 * sure there is no pending NAPI disable.
bea3348e 405 */
4d29515f 406static inline bool napi_schedule_prep(struct napi_struct *n)
bea3348e 407{
a0a46196
DM
408 return !napi_disable_pending(n) &&
409 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
bea3348e
SH
410}
411
412/**
413 * napi_schedule - schedule NAPI poll
414 * @n: napi context
415 *
416 * Schedule NAPI poll routine to be called if it is not already
417 * running.
418 */
419static inline void napi_schedule(struct napi_struct *n)
420{
421 if (napi_schedule_prep(n))
422 __napi_schedule(n);
423}
424
bfe13f54 425/* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
4d29515f 426static inline bool napi_reschedule(struct napi_struct *napi)
bfe13f54
RD
427{
428 if (napi_schedule_prep(napi)) {
429 __napi_schedule(napi);
4d29515f 430 return true;
bfe13f54 431 }
4d29515f 432 return false;
bfe13f54
RD
433}
434
bea3348e
SH
435/**
436 * napi_complete - NAPI processing complete
437 * @n: napi context
438 *
439 * Mark NAPI processing as complete.
440 */
d565b0a1
HX
441extern void __napi_complete(struct napi_struct *n);
442extern void napi_complete(struct napi_struct *n);
bea3348e
SH
443
444/**
445 * napi_disable - prevent NAPI from scheduling
446 * @n: napi context
447 *
448 * Stop NAPI from being scheduled on this context.
449 * Waits till any outstanding processing completes.
450 */
451static inline void napi_disable(struct napi_struct *n)
452{
a0a46196 453 set_bit(NAPI_STATE_DISABLE, &n->state);
bea3348e 454 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
43cc7380 455 msleep(1);
a0a46196 456 clear_bit(NAPI_STATE_DISABLE, &n->state);
bea3348e
SH
457}
458
459/**
460 * napi_enable - enable NAPI scheduling
461 * @n: napi context
462 *
463 * Resume NAPI from being scheduled on this context.
464 * Must be paired with napi_disable.
465 */
466static inline void napi_enable(struct napi_struct *n)
467{
468 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
469 smp_mb__before_clear_bit();
470 clear_bit(NAPI_STATE_SCHED, &n->state);
471}
472
c264c3de
SH
473#ifdef CONFIG_SMP
474/**
475 * napi_synchronize - wait until NAPI is not running
476 * @n: napi context
477 *
478 * Wait until NAPI is done being scheduled on this context.
479 * Waits till any outstanding processing completes but
480 * does not disable future activations.
481 */
482static inline void napi_synchronize(const struct napi_struct *n)
483{
484 while (test_bit(NAPI_STATE_SCHED, &n->state))
485 msleep(1);
486}
487#else
488# define napi_synchronize(n) barrier()
489#endif
490
d94d9fee 491enum netdev_queue_state_t {
73466498
TH
492 __QUEUE_STATE_DRV_XOFF,
493 __QUEUE_STATE_STACK_XOFF,
c3f26a26 494 __QUEUE_STATE_FROZEN,
73466498
TH
495#define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \
496 (1 << __QUEUE_STATE_STACK_XOFF))
497#define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
498 (1 << __QUEUE_STATE_FROZEN))
79d16385 499};
73466498
TH
500/*
501 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
502 * netif_tx_* functions below are used to manipulate this flag. The
503 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
504 * queue independently. The netif_xmit_*stopped functions below are called
505 * to check if the queue has been stopped by the driver or stack (either
506 * of the XOFF bits are set in the state). Drivers should not need to call
507 * netif_xmit*stopped functions, they should only be using netif_tx_*.
508 */
79d16385 509
bb949fbd 510struct netdev_queue {
6a321cb3
ED
511/*
512 * read mostly part
513 */
bb949fbd 514 struct net_device *dev;
b0e1e646
DM
515 struct Qdisc *qdisc;
516 struct Qdisc *qdisc_sleeping;
ccf5ff69 517#ifdef CONFIG_SYSFS
1d24eb48
TH
518 struct kobject kobj;
519#endif
f2cd2d3e
ED
520#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
521 int numa_node;
522#endif
6a321cb3
ED
523/*
524 * write mostly part
525 */
526 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
527 int xmit_lock_owner;
9d21493b
ED
528 /*
529 * please use this field instead of dev->trans_start
530 */
531 unsigned long trans_start;
ccf5ff69 532
533 /*
534 * Number of TX timeouts for this queue
535 * (/sys/class/net/DEV/Q/trans_timeout)
536 */
537 unsigned long trans_timeout;
114cf580
TH
538
539 unsigned long state;
540
541#ifdef CONFIG_BQL
542 struct dql dql;
543#endif
e8a0464c 544} ____cacheline_aligned_in_smp;
bb949fbd 545
f2cd2d3e
ED
546static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
547{
548#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
549 return q->numa_node;
550#else
b236da69 551 return NUMA_NO_NODE;
f2cd2d3e
ED
552#endif
553}
554
555static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
556{
557#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
558 q->numa_node = node;
559#endif
560}
561
df334545 562#ifdef CONFIG_RPS
0a9627f2
TH
563/*
564 * This structure holds an RPS map which can be of variable length. The
565 * map is an array of CPUs.
566 */
567struct rps_map {
568 unsigned int len;
569 struct rcu_head rcu;
570 u16 cpus[0];
571};
60b778ce 572#define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
0a9627f2 573
fec5e652 574/*
c445477d
BH
575 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
576 * tail pointer for that CPU's input queue at the time of last enqueue, and
577 * a hardware filter index.
fec5e652
TH
578 */
579struct rps_dev_flow {
580 u16 cpu;
c445477d 581 u16 filter;
fec5e652
TH
582 unsigned int last_qtail;
583};
c445477d 584#define RPS_NO_FILTER 0xffff
fec5e652
TH
585
586/*
587 * The rps_dev_flow_table structure contains a table of flow mappings.
588 */
589struct rps_dev_flow_table {
590 unsigned int mask;
591 struct rcu_head rcu;
592 struct work_struct free_work;
593 struct rps_dev_flow flows[0];
594};
595#define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
60b778ce 596 ((_num) * sizeof(struct rps_dev_flow)))
fec5e652
TH
597
598/*
599 * The rps_sock_flow_table contains mappings of flows to the last CPU
600 * on which they were processed by the application (set in recvmsg).
601 */
602struct rps_sock_flow_table {
603 unsigned int mask;
604 u16 ents[0];
605};
606#define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
60b778ce 607 ((_num) * sizeof(u16)))
fec5e652
TH
608
609#define RPS_NO_CPU 0xffff
610
611static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
612 u32 hash)
613{
614 if (table && hash) {
615 unsigned int cpu, index = hash & table->mask;
616
617 /* We only give a hint, preemption can change cpu under us */
618 cpu = raw_smp_processor_id();
619
620 if (table->ents[index] != cpu)
621 table->ents[index] = cpu;
622 }
623}
624
625static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
626 u32 hash)
627{
628 if (table && hash)
629 table->ents[hash & table->mask] = RPS_NO_CPU;
630}
631
6e3f7faf 632extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
fec5e652 633
c445477d
BH
634#ifdef CONFIG_RFS_ACCEL
635extern bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index,
636 u32 flow_id, u16 filter_id);
637#endif
638
0a9627f2
TH
639/* This structure contains an instance of an RX queue. */
640struct netdev_rx_queue {
6e3f7faf
ED
641 struct rps_map __rcu *rps_map;
642 struct rps_dev_flow_table __rcu *rps_flow_table;
643 struct kobject kobj;
fe822240 644 struct net_device *dev;
0a9627f2 645} ____cacheline_aligned_in_smp;
fec5e652 646#endif /* CONFIG_RPS */
d314774c 647
bf264145
TH
648#ifdef CONFIG_XPS
649/*
650 * This structure holds an XPS map which can be of variable length. The
651 * map is an array of queues.
652 */
653struct xps_map {
654 unsigned int len;
655 unsigned int alloc_len;
656 struct rcu_head rcu;
657 u16 queues[0];
658};
60b778ce 659#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
bf264145
TH
660#define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
661 / sizeof(u16))
662
663/*
664 * This structure holds all XPS maps for device. Maps are indexed by CPU.
665 */
666struct xps_dev_maps {
667 struct rcu_head rcu;
a4177869 668 struct xps_map __rcu *cpu_map[0];
bf264145
TH
669};
670#define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
671 (nr_cpu_ids * sizeof(struct xps_map *)))
672#endif /* CONFIG_XPS */
673
4f57c087
JF
674#define TC_MAX_QUEUE 16
675#define TC_BITMASK 15
676/* HW offloaded queuing disciplines txq count and offset maps */
677struct netdev_tc_txq {
678 u16 count;
679 u16 offset;
680};
681
68bad94e
NP
682#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
683/*
684 * This structure is to hold information about the device
685 * configured to run FCoE protocol stack.
686 */
687struct netdev_fcoe_hbainfo {
688 char manufacturer[64];
689 char serial_number[64];
690 char hardware_version[64];
691 char driver_version[64];
692 char optionrom_version[64];
693 char firmware_version[64];
694 char model[256];
695 char model_description[256];
696};
697#endif
698
d314774c
SH
699/*
700 * This structure defines the management hooks for network devices.
00829823
SH
701 * The following hooks can be defined; unless noted otherwise, they are
702 * optional and can be filled with a null pointer.
d314774c
SH
703 *
704 * int (*ndo_init)(struct net_device *dev);
705 * This function is called once when network device is registered.
706 * The network device can use this to any late stage initializaton
707 * or semantic validattion. It can fail with an error code which will
708 * be propogated back to register_netdev
709 *
710 * void (*ndo_uninit)(struct net_device *dev);
711 * This function is called when device is unregistered or when registration
712 * fails. It is not called if init fails.
713 *
714 * int (*ndo_open)(struct net_device *dev);
715 * This function is called when network device transistions to the up
716 * state.
717 *
718 * int (*ndo_stop)(struct net_device *dev);
719 * This function is called when network device transistions to the down
720 * state.
721 *
dc1f8bf6
SH
722 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
723 * struct net_device *dev);
00829823 724 * Called when a packet needs to be transmitted.
dc1f8bf6
SH
725 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
726 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
00829823
SH
727 * Required can not be NULL.
728 *
729 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
730 * Called to decide which queue to when device supports multiple
731 * transmit queues.
732 *
d314774c
SH
733 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
734 * This function is called to allow device receiver to make
735 * changes to configuration when multicast or promiscious is enabled.
736 *
737 * void (*ndo_set_rx_mode)(struct net_device *dev);
738 * This function is called device changes address list filtering.
01789349
JP
739 * If driver handles unicast address filtering, it should set
740 * IFF_UNICAST_FLT to its priv_flags.
d314774c
SH
741 *
742 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
743 * This function is called when the Media Access Control address
37b607c5 744 * needs to be changed. If this interface is not defined, the
d314774c
SH
745 * mac address can not be changed.
746 *
747 * int (*ndo_validate_addr)(struct net_device *dev);
748 * Test if Media Access Control address is valid for the device.
749 *
750 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
751 * Called when a user request an ioctl which can't be handled by
752 * the generic interface code. If not defined ioctl's return
753 * not supported error code.
754 *
755 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
756 * Used to set network devices bus interface parameters. This interface
757 * is retained for legacy reason, new devices should use the bus
758 * interface (PCI) for low level management.
759 *
760 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
761 * Called when a user wants to change the Maximum Transfer Unit
762 * of a device. If not defined, any request to change MTU will
763 * will return an error.
764 *
00829823 765 * void (*ndo_tx_timeout)(struct net_device *dev);
d314774c
SH
766 * Callback uses when the transmitter has not made any progress
767 * for dev->watchdog ticks.
768 *
3cfde79c 769 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
28172739 770 * struct rtnl_link_stats64 *storage);
d308e38f 771 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
d314774c 772 * Called when a user wants to get the network device usage
be1f3c2c 773 * statistics. Drivers must do one of the following:
3cfde79c
BH
774 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
775 * rtnl_link_stats64 structure passed by the caller.
82695d9b 776 * 2. Define @ndo_get_stats to update a net_device_stats structure
be1f3c2c
BH
777 * (which should normally be dev->stats) and return a pointer to
778 * it. The structure may be changed asynchronously only if each
779 * field is written atomically.
780 * 3. Update dev->stats asynchronously and atomically, and define
781 * neither operation.
d314774c 782 *
8e586137 783 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
d314774c
SH
784 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
785 * this function is called when a VLAN id is registered.
786 *
8e586137 787 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
d314774c
SH
788 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
789 * this function is called when a VLAN id is unregistered.
790 *
791 * void (*ndo_poll_controller)(struct net_device *dev);
95c26df8
WM
792 *
793 * SR-IOV management functions.
794 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
795 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
796 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
5f8444a3 797 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
95c26df8
WM
798 * int (*ndo_get_vf_config)(struct net_device *dev,
799 * int vf, struct ifla_vf_info *ivf);
57b61080
SF
800 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
801 * struct nlattr *port[]);
802 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
4f57c087
JF
803 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
804 * Called to setup 'tc' number of traffic classes in the net device. This
805 * is always called from the stack with the rtnl lock held and netif tx
806 * queues stopped. This allows the netdevice to perform queue management
807 * safely.
c445477d 808 *
e9bce845
YZ
809 * Fiber Channel over Ethernet (FCoE) offload functions.
810 * int (*ndo_fcoe_enable)(struct net_device *dev);
811 * Called when the FCoE protocol stack wants to start using LLD for FCoE
812 * so the underlying device can perform whatever needed configuration or
813 * initialization to support acceleration of FCoE traffic.
814 *
815 * int (*ndo_fcoe_disable)(struct net_device *dev);
816 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
817 * so the underlying device can perform whatever needed clean-ups to
818 * stop supporting acceleration of FCoE traffic.
819 *
820 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
821 * struct scatterlist *sgl, unsigned int sgc);
822 * Called when the FCoE Initiator wants to initialize an I/O that
823 * is a possible candidate for Direct Data Placement (DDP). The LLD can
824 * perform necessary setup and returns 1 to indicate the device is set up
825 * successfully to perform DDP on this I/O, otherwise this returns 0.
826 *
827 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
828 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
829 * indicated by the FC exchange id 'xid', so the underlying device can
830 * clean up and reuse resources for later DDP requests.
831 *
832 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
833 * struct scatterlist *sgl, unsigned int sgc);
834 * Called when the FCoE Target wants to initialize an I/O that
835 * is a possible candidate for Direct Data Placement (DDP). The LLD can
836 * perform necessary setup and returns 1 to indicate the device is set up
837 * successfully to perform DDP on this I/O, otherwise this returns 0.
838 *
68bad94e
NP
839 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
840 * struct netdev_fcoe_hbainfo *hbainfo);
841 * Called when the FCoE Protocol stack wants information on the underlying
842 * device. This information is utilized by the FCoE protocol stack to
843 * register attributes with Fiber Channel management service as per the
844 * FC-GS Fabric Device Management Information(FDMI) specification.
845 *
e9bce845
YZ
846 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
847 * Called when the underlying device wants to override default World Wide
848 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
849 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
850 * protocol stack to use.
851 *
c445477d
BH
852 * RFS acceleration.
853 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
854 * u16 rxq_index, u32 flow_id);
855 * Set hardware filter for RFS. rxq_index is the target queue index;
856 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
857 * Return the filter ID on success, or a negative error code.
fbaec0ea
JP
858 *
859 * Slave management functions (for bridge, bonding, etc). User should
860 * call netdev_set_master() to set dev->master properly.
861 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
862 * Called to make another netdev an underling.
863 *
864 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
865 * Called to release previously enslaved netdev.
5455c699
MM
866 *
867 * Feature/offload setting functions.
c8f44aff
MM
868 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
869 * netdev_features_t features);
5455c699
MM
870 * Adjusts the requested feature flags according to device-specific
871 * constraints, and returns the resulting flags. Must not modify
872 * the device state.
873 *
c8f44aff 874 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
5455c699
MM
875 * Called to update device configuration to new features. Passed
876 * feature set might be less than what was returned by ndo_fix_features()).
877 * Must return >0 or -errno if it changed dev->features itself.
878 *
edc7d573 879 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
880 * struct net_device *dev,
6b6e2725 881 * const unsigned char *addr, u16 flags)
77162022
JF
882 * Adds an FDB entry to dev for addr.
883 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct net_device *dev,
6b6e2725 884 * const unsigned char *addr)
77162022
JF
885 * Deletes the FDB entry from dev coresponding to addr.
886 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
887 * struct net_device *dev, int idx)
888 * Used to add FDB entries to dump requests. Implementers should add
889 * entries to skb and update idx with the number of entries.
e5a55a89
JF
890 *
891 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh)
892 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
893 * struct net_device *dev)
4bf84c35
JP
894 *
895 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
896 * Called to change device carrier. Soft-devices (like dummy, team, etc)
897 * which do not represent real hardware may define this to allow their
898 * userspace components to manage their virtual carrier state. Devices
899 * that determine carrier state from physical hardware properties (eg
900 * network cables) or protocol-dependent mechanisms (eg
901 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
d314774c
SH
902 */
903struct net_device_ops {
904 int (*ndo_init)(struct net_device *dev);
905 void (*ndo_uninit)(struct net_device *dev);
906 int (*ndo_open)(struct net_device *dev);
907 int (*ndo_stop)(struct net_device *dev);
dc1f8bf6 908 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
00829823
SH
909 struct net_device *dev);
910 u16 (*ndo_select_queue)(struct net_device *dev,
911 struct sk_buff *skb);
d314774c
SH
912 void (*ndo_change_rx_flags)(struct net_device *dev,
913 int flags);
d314774c 914 void (*ndo_set_rx_mode)(struct net_device *dev);
d314774c
SH
915 int (*ndo_set_mac_address)(struct net_device *dev,
916 void *addr);
d314774c 917 int (*ndo_validate_addr)(struct net_device *dev);
d314774c
SH
918 int (*ndo_do_ioctl)(struct net_device *dev,
919 struct ifreq *ifr, int cmd);
d314774c
SH
920 int (*ndo_set_config)(struct net_device *dev,
921 struct ifmap *map);
00829823
SH
922 int (*ndo_change_mtu)(struct net_device *dev,
923 int new_mtu);
924 int (*ndo_neigh_setup)(struct net_device *dev,
925 struct neigh_parms *);
d314774c
SH
926 void (*ndo_tx_timeout) (struct net_device *dev);
927
28172739
ED
928 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
929 struct rtnl_link_stats64 *storage);
d314774c
SH
930 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
931
8e586137 932 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
d314774c 933 unsigned short vid);
8e586137 934 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
d314774c
SH
935 unsigned short vid);
936#ifdef CONFIG_NET_POLL_CONTROLLER
d314774c 937 void (*ndo_poll_controller)(struct net_device *dev);
4247e161 938 int (*ndo_netpoll_setup)(struct net_device *dev,
47be03a2
AW
939 struct netpoll_info *info,
940 gfp_t gfp);
0e34e931 941 void (*ndo_netpoll_cleanup)(struct net_device *dev);
d314774c 942#endif
95c26df8
WM
943 int (*ndo_set_vf_mac)(struct net_device *dev,
944 int queue, u8 *mac);
945 int (*ndo_set_vf_vlan)(struct net_device *dev,
946 int queue, u16 vlan, u8 qos);
947 int (*ndo_set_vf_tx_rate)(struct net_device *dev,
948 int vf, int rate);
5f8444a3
GR
949 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
950 int vf, bool setting);
95c26df8
WM
951 int (*ndo_get_vf_config)(struct net_device *dev,
952 int vf,
953 struct ifla_vf_info *ivf);
57b61080
SF
954 int (*ndo_set_vf_port)(struct net_device *dev,
955 int vf,
956 struct nlattr *port[]);
957 int (*ndo_get_vf_port)(struct net_device *dev,
958 int vf, struct sk_buff *skb);
4f57c087 959 int (*ndo_setup_tc)(struct net_device *dev, u8 tc);
d11ead75 960#if IS_ENABLED(CONFIG_FCOE)
cb454399
YZ
961 int (*ndo_fcoe_enable)(struct net_device *dev);
962 int (*ndo_fcoe_disable)(struct net_device *dev);
4d288d57
YZ
963 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
964 u16 xid,
965 struct scatterlist *sgl,
966 unsigned int sgc);
967 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
968 u16 xid);
6247e086
YZ
969 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
970 u16 xid,
971 struct scatterlist *sgl,
972 unsigned int sgc);
68bad94e
NP
973 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
974 struct netdev_fcoe_hbainfo *hbainfo);
3c9c36bc
BPG
975#endif
976
d11ead75 977#if IS_ENABLED(CONFIG_LIBFCOE)
df5c7945
YZ
978#define NETDEV_FCOE_WWNN 0
979#define NETDEV_FCOE_WWPN 1
980 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
981 u64 *wwn, int type);
4d288d57 982#endif
3c9c36bc 983
c445477d
BH
984#ifdef CONFIG_RFS_ACCEL
985 int (*ndo_rx_flow_steer)(struct net_device *dev,
986 const struct sk_buff *skb,
987 u16 rxq_index,
988 u32 flow_id);
989#endif
fbaec0ea
JP
990 int (*ndo_add_slave)(struct net_device *dev,
991 struct net_device *slave_dev);
992 int (*ndo_del_slave)(struct net_device *dev,
993 struct net_device *slave_dev);
c8f44aff
MM
994 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
995 netdev_features_t features);
5455c699 996 int (*ndo_set_features)(struct net_device *dev,
c8f44aff 997 netdev_features_t features);
da6a8fa0 998 int (*ndo_neigh_construct)(struct neighbour *n);
447f2191 999 void (*ndo_neigh_destroy)(struct neighbour *n);
77162022
JF
1000
1001 int (*ndo_fdb_add)(struct ndmsg *ndm,
edc7d573 1002 struct nlattr *tb[],
77162022 1003 struct net_device *dev,
6b6e2725 1004 const unsigned char *addr,
77162022
JF
1005 u16 flags);
1006 int (*ndo_fdb_del)(struct ndmsg *ndm,
1007 struct net_device *dev,
6b6e2725 1008 const unsigned char *addr);
77162022
JF
1009 int (*ndo_fdb_dump)(struct sk_buff *skb,
1010 struct netlink_callback *cb,
1011 struct net_device *dev,
1012 int idx);
e5a55a89
JF
1013
1014 int (*ndo_bridge_setlink)(struct net_device *dev,
1015 struct nlmsghdr *nlh);
1016 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1017 u32 pid, u32 seq,
1018 struct net_device *dev);
4bf84c35
JP
1019 int (*ndo_change_carrier)(struct net_device *dev,
1020 bool new_carrier);
d314774c
SH
1021};
1022
1da177e4
LT
1023/*
1024 * The DEVICE structure.
1025 * Actually, this whole structure is a big mistake. It mixes I/O
1026 * data with strictly "high-level" data, and it has to know about
1027 * almost every data structure used in the INET module.
1028 *
1029 * FIXME: cleanup struct net_device such that network protocol info
1030 * moves out.
1031 */
1032
d94d9fee 1033struct net_device {
1da177e4
LT
1034
1035 /*
1036 * This is the first field of the "visible" part of this structure
1037 * (i.e. as seen by users in the "Space.c" file). It is the name
724df615 1038 * of the interface.
1da177e4
LT
1039 */
1040 char name[IFNAMSIZ];
ed77134b 1041
9136461a 1042 /* device name hash chain, please keep it close to name[] */
9356b8fc 1043 struct hlist_node name_hlist;
9136461a 1044
0b815a1a
SH
1045 /* snmp alias */
1046 char *ifalias;
1da177e4
LT
1047
1048 /*
1049 * I/O specific fields
1050 * FIXME: Merge these and struct ifmap into one
1051 */
1052 unsigned long mem_end; /* shared mem end */
1053 unsigned long mem_start; /* shared mem start */
1054 unsigned long base_addr; /* device I/O address */
1055 unsigned int irq; /* device IRQ number */
1056
1057 /*
1058 * Some hardware also needs these fields, but they are not
1059 * part of the usual set specified in Space.c.
1060 */
1061
1da177e4
LT
1062 unsigned long state;
1063
7562f876 1064 struct list_head dev_list;
bea3348e 1065 struct list_head napi_list;
44a0873d 1066 struct list_head unreg_list;
1da177e4 1067
5455c699 1068 /* currently active device features */
c8f44aff 1069 netdev_features_t features;
5455c699 1070 /* user-changeable features */
c8f44aff 1071 netdev_features_t hw_features;
5455c699 1072 /* user-requested features */
c8f44aff 1073 netdev_features_t wanted_features;
1aac6267 1074 /* mask of features inheritable by VLAN devices */
c8f44aff 1075 netdev_features_t vlan_features;
6a674e9c
JG
1076 /* mask of features inherited by encapsulating devices
1077 * This field indicates what encapsulation offloads
1078 * the hardware is capable of doing, and drivers will
1079 * need to set them appropriately.
1080 */
1081 netdev_features_t hw_enc_features;
04ed3e74 1082
1da177e4
LT
1083 /* Interface index. Unique device identifier */
1084 int ifindex;
1085 int iflink;
1086
c45d286e 1087 struct net_device_stats stats;
caf586e5
ED
1088 atomic_long_t rx_dropped; /* dropped packets by core network
1089 * Do not use this in drivers.
1090 */
1da177e4 1091
b86e0280 1092#ifdef CONFIG_WIRELESS_EXT
1da177e4
LT
1093 /* List of functions to handle Wireless Extensions (instead of ioctl).
1094 * See <net/iw_handler.h> for details. Jean II */
1095 const struct iw_handler_def * wireless_handlers;
1096 /* Instance data managed by the core of Wireless Extensions. */
1097 struct iw_public_data * wireless_data;
b86e0280 1098#endif
d314774c
SH
1099 /* Management operations */
1100 const struct net_device_ops *netdev_ops;
76fd8593 1101 const struct ethtool_ops *ethtool_ops;
1da177e4 1102
3b04ddde
SH
1103 /* Hardware header description */
1104 const struct header_ops *header_ops;
1105
b00055aa 1106 unsigned int flags; /* interface flags (a la BSD) */
3bdc0eba
BG
1107 unsigned int priv_flags; /* Like 'flags' but invisible to userspace.
1108 * See if.h for definitions. */
1da177e4 1109 unsigned short gflags;
1da177e4
LT
1110 unsigned short padded; /* How much padding added by alloc_netdev() */
1111
b00055aa
SR
1112 unsigned char operstate; /* RFC2863 operstate */
1113 unsigned char link_mode; /* mapping policy to operstate */
1114
bdc220da
JP
1115 unsigned char if_port; /* Selectable AUI, TP,..*/
1116 unsigned char dma; /* DMA channel */
1117
cd7b5396 1118 unsigned int mtu; /* interface MTU value */
1da177e4
LT
1119 unsigned short type; /* interface hardware type */
1120 unsigned short hard_header_len; /* hardware hdr length */
1da177e4 1121
f5184d26
JB
1122 /* extra head- and tailroom the hardware may need, but not in all cases
1123 * can this be guaranteed, especially tailroom. Some cases also use
1124 * LL_MAX_HEADER instead to allocate the skb.
1125 */
1126 unsigned short needed_headroom;
1127 unsigned short needed_tailroom;
1128
1da177e4 1129 /* Interface address info. */
a6f9a705 1130 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
c1f79426 1131 unsigned char addr_assign_type; /* hw address assignment type */
1da177e4 1132 unsigned char addr_len; /* hardware address length */
596b9b68 1133 unsigned char neigh_priv_len;
1da177e4
LT
1134 unsigned short dev_id; /* for shared network cards */
1135
ccffad25 1136 spinlock_t addr_list_lock;
22bedad3
JP
1137 struct netdev_hw_addr_list uc; /* Unicast mac addresses */
1138 struct netdev_hw_addr_list mc; /* Multicast mac addresses */
2d348d1f 1139 bool uc_promisc;
9d45abe1
WC
1140 unsigned int promiscuity;
1141 unsigned int allmulti;
1da177e4 1142
1da177e4
LT
1143
1144 /* Protocol specific pointers */
65ac6a5f 1145
d11ead75 1146#if IS_ENABLED(CONFIG_VLAN_8021Q)
5b9ea6e0 1147 struct vlan_info __rcu *vlan_info; /* VLAN info */
65ac6a5f 1148#endif
34a430d7 1149#if IS_ENABLED(CONFIG_NET_DSA)
cf50dcc2 1150 struct dsa_switch_tree *dsa_ptr; /* dsa specific data */
91da11f8 1151#endif
1da177e4 1152 void *atalk_ptr; /* AppleTalk link */
95ae6b22 1153 struct in_device __rcu *ip_ptr; /* IPv4 specific data */
fc766e4c 1154 struct dn_dev __rcu *dn_ptr; /* DECnet specific data */
198caeca 1155 struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */
1da177e4 1156 void *ax25_ptr; /* AX.25 specific data */
704232c2
JB
1157 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
1158 assign before registering */
1da177e4 1159
9356b8fc 1160/*
cd13539b 1161 * Cache lines mostly used on receive path (including eth_type_trans())
9356b8fc 1162 */
4dc89133
ED
1163 unsigned long last_rx; /* Time of last Rx
1164 * This should not be set in
1165 * drivers, unless really needed,
1166 * because network stack (bonding)
1167 * use it if/when necessary, to
1168 * avoid dirtying this cache line.
1169 */
1170
cd13539b
ED
1171 struct net_device *master; /* Pointer to master device of a group,
1172 * which this device is member of.
1173 */
1174
9356b8fc 1175 /* Interface address info used in eth_type_trans() */
f001fde5
JP
1176 unsigned char *dev_addr; /* hw address, (before bcast
1177 because most packets are
1178 unicast) */
1179
31278e71
JP
1180 struct netdev_hw_addr_list dev_addrs; /* list of device
1181 hw addresses */
9356b8fc
ED
1182
1183 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1da177e4 1184
ccf5ff69 1185#ifdef CONFIG_SYSFS
0a9627f2 1186 struct kset *queues_kset;
ccf5ff69 1187#endif
0a9627f2 1188
ccf5ff69 1189#ifdef CONFIG_RPS
0a9627f2
TH
1190 struct netdev_rx_queue *_rx;
1191
62fe0b40 1192 /* Number of RX queues allocated at register_netdev() time */
0a9627f2 1193 unsigned int num_rx_queues;
62fe0b40
BH
1194
1195 /* Number of RX queues currently active in device */
1196 unsigned int real_num_rx_queues;
c445477d
BH
1197
1198#ifdef CONFIG_RFS_ACCEL
1199 /* CPU reverse-mapping for RX completion interrupts, indexed
1200 * by RX queue number. Assigned by driver. This must only be
1201 * set if the ndo_rx_flow_steer operation is defined. */
1202 struct cpu_rmap *rx_cpu_rmap;
1203#endif
df334545 1204#endif
0a9627f2 1205
61391cde 1206 rx_handler_func_t __rcu *rx_handler;
1207 void __rcu *rx_handler_data;
e8a0464c 1208
24824a09 1209 struct netdev_queue __rcu *ingress_queue;
cd13539b
ED
1210
1211/*
1212 * Cache lines mostly used on transmit path
1213 */
e8a0464c 1214 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
fd2ea0a7
DM
1215
1216 /* Number of TX queues allocated at alloc_netdev_mq() time */
e8a0464c 1217 unsigned int num_tx_queues;
fd2ea0a7
DM
1218
1219 /* Number of TX queues currently active in device */
1220 unsigned int real_num_tx_queues;
1221
af356afa
PM
1222 /* root qdisc from userspace point of view */
1223 struct Qdisc *qdisc;
1224
1da177e4 1225 unsigned long tx_queue_len; /* Max frames per queue allowed */
c3f26a26 1226 spinlock_t tx_global_lock;
cd13539b 1227
bf264145 1228#ifdef CONFIG_XPS
a4177869 1229 struct xps_dev_maps __rcu *xps_maps;
bf264145 1230#endif
1d24eb48 1231
9356b8fc 1232 /* These may be needed for future network-power-down code. */
9d21493b
ED
1233
1234 /*
1235 * trans_start here is expensive for high speed devices on SMP,
1236 * please use netdev_queue->trans_start instead.
1237 */
9356b8fc
ED
1238 unsigned long trans_start; /* Time (in jiffies) of last Tx */
1239
1240 int watchdog_timeo; /* used by dev_watchdog() */
1241 struct timer_list watchdog_timer;
1242
1da177e4 1243 /* Number of references to this device */
29b4433d 1244 int __percpu *pcpu_refcnt;
9356b8fc 1245
1da177e4
LT
1246 /* delayed register/unregister */
1247 struct list_head todo_list;
1da177e4
LT
1248 /* device index hash chain */
1249 struct hlist_node index_hlist;
1250
e014debe 1251 struct list_head link_watch_list;
572a103d 1252
1da177e4
LT
1253 /* register/unregister state machine */
1254 enum { NETREG_UNINITIALIZED=0,
b17a7c17 1255 NETREG_REGISTERED, /* completed register_netdevice */
1da177e4
LT
1256 NETREG_UNREGISTERING, /* called unregister_netdevice */
1257 NETREG_UNREGISTERED, /* completed unregister todo */
1258 NETREG_RELEASED, /* called free_netdev */
937f1ba5 1259 NETREG_DUMMY, /* dummy device for NAPI poll */
449f4544
ED
1260 } reg_state:8;
1261
1262 bool dismantle; /* device is going do be freed */
a2835763
PM
1263
1264 enum {
1265 RTNL_LINK_INITIALIZED,
1266 RTNL_LINK_INITIALIZING,
1267 } rtnl_link_state:16;
1da177e4 1268
d314774c
SH
1269 /* Called from unregister, can be used to call free_netdev */
1270 void (*destructor)(struct net_device *dev);
1da177e4 1271
1da177e4 1272#ifdef CONFIG_NETPOLL
115c1d6e 1273 struct netpoll_info *npinfo;
1da177e4 1274#endif
eae792b7 1275
c346dca1 1276#ifdef CONFIG_NET_NS
4a1c5371
EB
1277 /* Network namespace this network device is inside */
1278 struct net *nd_net;
c346dca1 1279#endif
4a1c5371 1280
4951704b 1281 /* mid-layer private */
a7855c78
ED
1282 union {
1283 void *ml_priv;
1284 struct pcpu_lstats __percpu *lstats; /* loopback stats */
290b895e 1285 struct pcpu_tstats __percpu *tstats; /* tunnel stats */
6d81f41c 1286 struct pcpu_dstats __percpu *dstats; /* dummy stats */
a7855c78 1287 };
eca9ebac 1288 /* GARP */
3cc77ec7 1289 struct garp_port __rcu *garp_port;
1da177e4 1290
1da177e4 1291 /* class/net/name entry */
43cb76d9 1292 struct device dev;
0c509a6c
EB
1293 /* space for optional device, statistics, and wireless sysfs groups */
1294 const struct attribute_group *sysfs_groups[4];
38f7b870
PM
1295
1296 /* rtnetlink link ops */
1297 const struct rtnl_link_ops *rtnl_link_ops;
f25f4e44 1298
82cc1a7a
PWJ
1299 /* for setting kernel sock attribute on TCP connection setup */
1300#define GSO_MAX_SIZE 65536
1301 unsigned int gso_max_size;
30b678d8
BH
1302#define GSO_MAX_SEGS 65535
1303 u16 gso_max_segs;
d314774c 1304
7a6b6f51 1305#ifdef CONFIG_DCB
2f90b865 1306 /* Data Center Bridging netlink ops */
32953543 1307 const struct dcbnl_rtnl_ops *dcbnl_ops;
2f90b865 1308#endif
4f57c087
JF
1309 u8 num_tc;
1310 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
1311 u8 prio_tc_map[TC_BITMASK + 1];
2f90b865 1312
d11ead75 1313#if IS_ENABLED(CONFIG_FCOE)
4d288d57
YZ
1314 /* max exchange id for FCoE LRO by ddp */
1315 unsigned int fcoe_ddp_xid;
5bc1421e
NH
1316#endif
1317#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
1318 struct netprio_map __rcu *priomap;
4d288d57 1319#endif
c1f19b51
RC
1320 /* phy device may attach itself for hardware timestamping */
1321 struct phy_device *phydev;
cbda10fa 1322
23d3b8bf
ED
1323 struct lock_class_key *qdisc_tx_busylock;
1324
cbda10fa
VD
1325 /* group the device belongs to */
1326 int group;
9136461a
ED
1327
1328 struct pm_qos_request pm_qos_req;
1da177e4 1329};
43cb76d9 1330#define to_net_dev(d) container_of(d, struct net_device, dev)
1da177e4
LT
1331
1332#define NETDEV_ALIGN 32
1da177e4 1333
4f57c087
JF
1334static inline
1335int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
1336{
1337 return dev->prio_tc_map[prio & TC_BITMASK];
1338}
1339
1340static inline
1341int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
1342{
1343 if (tc >= dev->num_tc)
1344 return -EINVAL;
1345
1346 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
1347 return 0;
1348}
1349
1350static inline
1351void netdev_reset_tc(struct net_device *dev)
1352{
1353 dev->num_tc = 0;
1354 memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
1355 memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
1356}
1357
1358static inline
1359int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
1360{
1361 if (tc >= dev->num_tc)
1362 return -EINVAL;
1363
1364 dev->tc_to_txq[tc].count = count;
1365 dev->tc_to_txq[tc].offset = offset;
1366 return 0;
1367}
1368
1369static inline
1370int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
1371{
1372 if (num_tc > TC_MAX_QUEUE)
1373 return -EINVAL;
1374
1375 dev->num_tc = num_tc;
1376 return 0;
1377}
1378
1379static inline
1380int netdev_get_num_tc(struct net_device *dev)
1381{
1382 return dev->num_tc;
1383}
1384
e8a0464c
DM
1385static inline
1386struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1387 unsigned int index)
1388{
1389 return &dev->_tx[index];
1390}
1391
1392static inline void netdev_for_each_tx_queue(struct net_device *dev,
1393 void (*f)(struct net_device *,
1394 struct netdev_queue *,
1395 void *),
1396 void *arg)
1397{
1398 unsigned int i;
1399
1400 for (i = 0; i < dev->num_tx_queues; i++)
1401 f(dev, &dev->_tx[i], arg);
1402}
1403
8c4c49df
AW
1404extern struct netdev_queue *netdev_pick_tx(struct net_device *dev,
1405 struct sk_buff *skb);
1406
c346dca1
YH
1407/*
1408 * Net namespace inlines
1409 */
1410static inline
1411struct net *dev_net(const struct net_device *dev)
1412{
c2d9ba9b 1413 return read_pnet(&dev->nd_net);
c346dca1
YH
1414}
1415
1416static inline
f5aa23fd 1417void dev_net_set(struct net_device *dev, struct net *net)
c346dca1
YH
1418{
1419#ifdef CONFIG_NET_NS
f3005d7f
DL
1420 release_net(dev->nd_net);
1421 dev->nd_net = hold_net(net);
c346dca1
YH
1422#endif
1423}
1424
cf85d08f
LB
1425static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1426{
1427#ifdef CONFIG_NET_DSA_TAG_DSA
1428 if (dev->dsa_ptr != NULL)
1429 return dsa_uses_dsa_tags(dev->dsa_ptr);
1430#endif
1431
1432 return 0;
1433}
1434
396138f0
LB
1435static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1436{
1437#ifdef CONFIG_NET_DSA_TAG_TRAILER
1438 if (dev->dsa_ptr != NULL)
1439 return dsa_uses_trailer_tags(dev->dsa_ptr);
1440#endif
1441
1442 return 0;
1443}
1444
bea3348e
SH
1445/**
1446 * netdev_priv - access network device private data
1447 * @dev: network device
1448 *
1449 * Get network device private data
1450 */
6472ce60 1451static inline void *netdev_priv(const struct net_device *dev)
1da177e4 1452{
1ce8e7b5 1453 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1da177e4
LT
1454}
1455
1da177e4
LT
1456/* Set the sysfs physical device reference for the network logical device
1457 * if set prior to registration will cause a symlink during initialization.
1458 */
43cb76d9 1459#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1da177e4 1460
384912ed
MH
1461/* Set the sysfs device type for the network logical device to allow
1462 * fin grained indentification of different network device types. For
1463 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1464 */
1465#define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1466
3b582cc1
SH
1467/**
1468 * netif_napi_add - initialize a napi context
1469 * @dev: network device
1470 * @napi: napi context
1471 * @poll: polling function
1472 * @weight: default weight
1473 *
1474 * netif_napi_add() must be used to initialize a napi context prior to calling
1475 * *any* of the other napi related functions.
1476 */
d565b0a1
HX
1477void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1478 int (*poll)(struct napi_struct *, int), int weight);
bea3348e 1479
d8156534
AD
1480/**
1481 * netif_napi_del - remove a napi context
1482 * @napi: napi context
1483 *
1484 * netif_napi_del() removes a napi context from the network device napi list
1485 */
d565b0a1
HX
1486void netif_napi_del(struct napi_struct *napi);
1487
1488struct napi_gro_cb {
78a478d0
HX
1489 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1490 void *frag0;
1491
7489594c
HX
1492 /* Length of frag0. */
1493 unsigned int frag0_len;
1494
86911732
HX
1495 /* This indicates where we are processing relative to skb->data. */
1496 int data_offset;
1497
d565b0a1
HX
1498 /* This is non-zero if the packet cannot be merged with the new skb. */
1499 int flush;
1500
1501 /* Number of segments aggregated. */
2e71a6f8
ED
1502 u16 count;
1503
1504 /* This is non-zero if the packet may be of the same flow. */
1505 u8 same_flow;
5d38a079
HX
1506
1507 /* Free the skb? */
2e71a6f8 1508 u8 free;
d7e8883c
ED
1509#define NAPI_GRO_FREE 1
1510#define NAPI_GRO_FREE_STOLEN_HEAD 2
2e71a6f8
ED
1511
1512 /* jiffies when first packet was created/queued */
1513 unsigned long age;
86347245
ED
1514
1515 /* Used in ipv6_gro_receive() */
1516 int proto;
c3c7c254
ED
1517
1518 /* used in skb_gro_receive() slow path */
1519 struct sk_buff *last;
d565b0a1
HX
1520};
1521
1522#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
d8156534 1523
1da177e4 1524struct packet_type {
f2ccd8fa
DM
1525 __be16 type; /* This is really htons(ether_type). */
1526 struct net_device *dev; /* NULL is wildcarded here */
1527 int (*func) (struct sk_buff *,
1528 struct net_device *,
1529 struct packet_type *,
1530 struct net_device *);
c0de08d0
EL
1531 bool (*id_match)(struct packet_type *ptype,
1532 struct sock *sk);
1da177e4
LT
1533 void *af_packet_priv;
1534 struct list_head list;
1535};
1536
f191a1d1 1537struct offload_callbacks {
576a30eb 1538 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
c8f44aff 1539 netdev_features_t features);
a430a43d 1540 int (*gso_send_check)(struct sk_buff *skb);
d565b0a1
HX
1541 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1542 struct sk_buff *skb);
1543 int (*gro_complete)(struct sk_buff *skb);
f191a1d1
VY
1544};
1545
1546struct packet_offload {
1547 __be16 type; /* This is really htons(ether_type). */
1548 struct offload_callbacks callbacks;
1549 struct list_head list;
1da177e4
LT
1550};
1551
1da177e4
LT
1552#include <linux/notifier.h>
1553
dcfe1421
AW
1554/* netdevice notifier chain. Please remember to update the rtnetlink
1555 * notification exclusion list in rtnetlink_event() when adding new
1556 * types.
1557 */
1558#define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
1559#define NETDEV_DOWN 0x0002
1560#define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
1561 detected a hardware crash and restarted
1562 - we can use this eg to kick tcp sessions
1563 once done */
1564#define NETDEV_CHANGE 0x0004 /* Notify device state change */
1565#define NETDEV_REGISTER 0x0005
1566#define NETDEV_UNREGISTER 0x0006
1567#define NETDEV_CHANGEMTU 0x0007
1568#define NETDEV_CHANGEADDR 0x0008
1569#define NETDEV_GOING_DOWN 0x0009
1570#define NETDEV_CHANGENAME 0x000A
1571#define NETDEV_FEAT_CHANGE 0x000B
1572#define NETDEV_BONDING_FAILOVER 0x000C
1573#define NETDEV_PRE_UP 0x000D
1574#define NETDEV_PRE_TYPE_CHANGE 0x000E
1575#define NETDEV_POST_TYPE_CHANGE 0x000F
1576#define NETDEV_POST_INIT 0x0010
0115e8e3 1577#define NETDEV_UNREGISTER_FINAL 0x0011
dcfe1421
AW
1578#define NETDEV_RELEASE 0x0012
1579#define NETDEV_NOTIFY_PEERS 0x0013
1580#define NETDEV_JOIN 0x0014
1581
1582extern int register_netdevice_notifier(struct notifier_block *nb);
1583extern int unregister_netdevice_notifier(struct notifier_block *nb);
1584extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1585
1586
1da177e4
LT
1587extern rwlock_t dev_base_lock; /* Device list lock */
1588
30e6c9fa 1589extern seqcount_t devnet_rename_seq; /* Device rename seq */
c91f6df2 1590
7562f876 1591
881d966b
EB
1592#define for_each_netdev(net, d) \
1593 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
dcbccbd4
EB
1594#define for_each_netdev_reverse(net, d) \
1595 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
c6d14c84
ED
1596#define for_each_netdev_rcu(net, d) \
1597 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
881d966b
EB
1598#define for_each_netdev_safe(net, d, n) \
1599 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1600#define for_each_netdev_continue(net, d) \
1601 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
254245d2 1602#define for_each_netdev_continue_rcu(net, d) \
1603 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
881d966b 1604#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
7562f876 1605
a050c33f
DL
1606static inline struct net_device *next_net_device(struct net_device *dev)
1607{
1608 struct list_head *lh;
1609 struct net *net;
1610
c346dca1 1611 net = dev_net(dev);
a050c33f
DL
1612 lh = dev->dev_list.next;
1613 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1614}
1615
ce81b76a
ED
1616static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1617{
1618 struct list_head *lh;
1619 struct net *net;
1620
1621 net = dev_net(dev);
ccf43438 1622 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
ce81b76a
ED
1623 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1624}
1625
a050c33f
DL
1626static inline struct net_device *first_net_device(struct net *net)
1627{
1628 return list_empty(&net->dev_base_head) ? NULL :
1629 net_device_entry(net->dev_base_head.next);
1630}
7562f876 1631
ccf43438
ED
1632static inline struct net_device *first_net_device_rcu(struct net *net)
1633{
1634 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
1635
1636 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1637}
1638
1da177e4
LT
1639extern int netdev_boot_setup_check(struct net_device *dev);
1640extern unsigned long netdev_boot_base(const char *prefix, int unit);
941666c2
ED
1641extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
1642 const char *hwaddr);
881d966b
EB
1643extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1644extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1da177e4
LT
1645extern void dev_add_pack(struct packet_type *pt);
1646extern void dev_remove_pack(struct packet_type *pt);
1647extern void __dev_remove_pack(struct packet_type *pt);
62532da9
VY
1648extern void dev_add_offload(struct packet_offload *po);
1649extern void dev_remove_offload(struct packet_offload *po);
1650extern void __dev_remove_offload(struct packet_offload *po);
1da177e4 1651
bb69ae04
ED
1652extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
1653 unsigned short mask);
881d966b 1654extern struct net_device *dev_get_by_name(struct net *net, const char *name);
72c9528b 1655extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
881d966b 1656extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1da177e4
LT
1657extern int dev_alloc_name(struct net_device *dev, const char *name);
1658extern int dev_open(struct net_device *dev);
1659extern int dev_close(struct net_device *dev);
0187bdfb 1660extern void dev_disable_lro(struct net_device *dev);
95603e22 1661extern int dev_loopback_xmit(struct sk_buff *newskb);
1da177e4
LT
1662extern int dev_queue_xmit(struct sk_buff *skb);
1663extern int register_netdevice(struct net_device *dev);
44a0873d
ED
1664extern void unregister_netdevice_queue(struct net_device *dev,
1665 struct list_head *head);
9b5e383c 1666extern void unregister_netdevice_many(struct list_head *head);
44a0873d
ED
1667static inline void unregister_netdevice(struct net_device *dev)
1668{
1669 unregister_netdevice_queue(dev, NULL);
1670}
1671
29b4433d 1672extern int netdev_refcnt_read(const struct net_device *dev);
1da177e4
LT
1673extern void free_netdev(struct net_device *dev);
1674extern void synchronize_net(void);
937f1ba5 1675extern int init_dummy_netdev(struct net_device *dev);
9d40bbda 1676extern void netdev_resync_ops(struct net_device *dev);
937f1ba5 1677
881d966b
EB
1678extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1679extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
fb699dfd 1680extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1da177e4
LT
1681extern int dev_restart(struct net_device *dev);
1682#ifdef CONFIG_NETPOLL_TRAP
1683extern int netpoll_trap(void);
1684#endif
86911732
HX
1685extern int skb_gro_receive(struct sk_buff **head,
1686 struct sk_buff *skb);
1687
1688static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1689{
1690 return NAPI_GRO_CB(skb)->data_offset;
1691}
1692
1693static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1694{
1695 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1696}
1697
1698static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1699{
1700 NAPI_GRO_CB(skb)->data_offset += len;
1701}
1702
a5b1cf28
HX
1703static inline void *skb_gro_header_fast(struct sk_buff *skb,
1704 unsigned int offset)
86911732 1705{
a5b1cf28
HX
1706 return NAPI_GRO_CB(skb)->frag0 + offset;
1707}
78a478d0 1708
a5b1cf28
HX
1709static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1710{
1711 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1712}
78a478d0 1713
a5b1cf28
HX
1714static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1715 unsigned int offset)
1716{
17dd759c
HX
1717 if (!pskb_may_pull(skb, hlen))
1718 return NULL;
1719
a5b1cf28
HX
1720 NAPI_GRO_CB(skb)->frag0 = NULL;
1721 NAPI_GRO_CB(skb)->frag0_len = 0;
17dd759c 1722 return skb->data + offset;
86911732 1723}
1da177e4 1724
aa4b9f53
HX
1725static inline void *skb_gro_mac_header(struct sk_buff *skb)
1726{
78d3fd0b 1727 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
aa4b9f53
HX
1728}
1729
36e7b1b8
HX
1730static inline void *skb_gro_network_header(struct sk_buff *skb)
1731{
78d3fd0b
HX
1732 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1733 skb_network_offset(skb);
36e7b1b8
HX
1734}
1735
0c4e8581
SH
1736static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1737 unsigned short type,
3b04ddde 1738 const void *daddr, const void *saddr,
95c96174 1739 unsigned int len)
0c4e8581 1740{
f1ecfd5d 1741 if (!dev->header_ops || !dev->header_ops->create)
0c4e8581 1742 return 0;
3b04ddde
SH
1743
1744 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
0c4e8581
SH
1745}
1746
b95cce35
SH
1747static inline int dev_parse_header(const struct sk_buff *skb,
1748 unsigned char *haddr)
1749{
1750 const struct net_device *dev = skb->dev;
1751
1b83336b 1752 if (!dev->header_ops || !dev->header_ops->parse)
b95cce35 1753 return 0;
3b04ddde 1754 return dev->header_ops->parse(skb, haddr);
b95cce35
SH
1755}
1756
1da177e4
LT
1757typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1758extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1759static inline int unregister_gifconf(unsigned int family)
1760{
1761 return register_gifconf(family, NULL);
1762}
1763
1764/*
88751275 1765 * Incoming packets are placed on per-cpu queues
1da177e4 1766 */
d94d9fee 1767struct softnet_data {
37437bb2 1768 struct Qdisc *output_queue;
a9cbd588 1769 struct Qdisc **output_queue_tailp;
1da177e4 1770 struct list_head poll_list;
1da177e4 1771 struct sk_buff *completion_queue;
6e7676c1 1772 struct sk_buff_head process_queue;
1da177e4 1773
dee42870 1774 /* stats */
cd7b5396
DM
1775 unsigned int processed;
1776 unsigned int time_squeeze;
1777 unsigned int cpu_collision;
1778 unsigned int received_rps;
dee42870 1779
fd793d89 1780#ifdef CONFIG_RPS
88751275
ED
1781 struct softnet_data *rps_ipi_list;
1782
1783 /* Elements below can be accessed between CPUs for RPS */
0a9627f2 1784 struct call_single_data csd ____cacheline_aligned_in_smp;
88751275
ED
1785 struct softnet_data *rps_ipi_next;
1786 unsigned int cpu;
fec5e652 1787 unsigned int input_queue_head;
76cc8b13 1788 unsigned int input_queue_tail;
1e94d72f 1789#endif
95c96174 1790 unsigned int dropped;
0a9627f2 1791 struct sk_buff_head input_pkt_queue;
bea3348e 1792 struct napi_struct backlog;
1da177e4
LT
1793};
1794
76cc8b13 1795static inline void input_queue_head_incr(struct softnet_data *sd)
fec5e652
TH
1796{
1797#ifdef CONFIG_RPS
76cc8b13
TH
1798 sd->input_queue_head++;
1799#endif
1800}
1801
1802static inline void input_queue_tail_incr_save(struct softnet_data *sd,
1803 unsigned int *qtail)
1804{
1805#ifdef CONFIG_RPS
1806 *qtail = ++sd->input_queue_tail;
fec5e652
TH
1807#endif
1808}
1809
0a9627f2 1810DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
1da177e4 1811
37437bb2 1812extern void __netif_schedule(struct Qdisc *q);
1da177e4 1813
86d804e1 1814static inline void netif_schedule_queue(struct netdev_queue *txq)
1da177e4 1815{
73466498 1816 if (!(txq->state & QUEUE_STATE_ANY_XOFF))
37437bb2 1817 __netif_schedule(txq->qdisc);
86d804e1
DM
1818}
1819
fd2ea0a7
DM
1820static inline void netif_tx_schedule_all(struct net_device *dev)
1821{
1822 unsigned int i;
1823
1824 for (i = 0; i < dev->num_tx_queues; i++)
1825 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1826}
1827
d29f749e
DJ
1828static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1829{
73466498 1830 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
d29f749e
DJ
1831}
1832
bea3348e
SH
1833/**
1834 * netif_start_queue - allow transmit
1835 * @dev: network device
1836 *
1837 * Allow upper layers to call the device hard_start_xmit routine.
1838 */
1da177e4
LT
1839static inline void netif_start_queue(struct net_device *dev)
1840{
e8a0464c 1841 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1da177e4
LT
1842}
1843
fd2ea0a7
DM
1844static inline void netif_tx_start_all_queues(struct net_device *dev)
1845{
1846 unsigned int i;
1847
1848 for (i = 0; i < dev->num_tx_queues; i++) {
1849 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1850 netif_tx_start_queue(txq);
1851 }
1852}
1853
79d16385 1854static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1da177e4
LT
1855{
1856#ifdef CONFIG_NETPOLL_TRAP
5f286e11 1857 if (netpoll_trap()) {
7b3d3e4f 1858 netif_tx_start_queue(dev_queue);
1da177e4 1859 return;
5f286e11 1860 }
1da177e4 1861#endif
73466498 1862 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state))
37437bb2 1863 __netif_schedule(dev_queue->qdisc);
79d16385
DM
1864}
1865
d29f749e
DJ
1866/**
1867 * netif_wake_queue - restart transmit
1868 * @dev: network device
1869 *
1870 * Allow upper layers to call the device hard_start_xmit routine.
1871 * Used for flow control when transmit resources are available.
1872 */
79d16385
DM
1873static inline void netif_wake_queue(struct net_device *dev)
1874{
e8a0464c 1875 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1da177e4
LT
1876}
1877
fd2ea0a7
DM
1878static inline void netif_tx_wake_all_queues(struct net_device *dev)
1879{
1880 unsigned int i;
1881
1882 for (i = 0; i < dev->num_tx_queues; i++) {
1883 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1884 netif_tx_wake_queue(txq);
1885 }
1886}
1887
d29f749e
DJ
1888static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1889{
18543a64 1890 if (WARN_ON(!dev_queue)) {
256ee435 1891 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
18543a64
GC
1892 return;
1893 }
73466498 1894 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
d29f749e
DJ
1895}
1896
bea3348e
SH
1897/**
1898 * netif_stop_queue - stop transmitted packets
1899 * @dev: network device
1900 *
1901 * Stop upper layers calling the device hard_start_xmit routine.
1902 * Used for flow control when transmit resources are unavailable.
1903 */
1da177e4
LT
1904static inline void netif_stop_queue(struct net_device *dev)
1905{
e8a0464c 1906 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1da177e4
LT
1907}
1908
fd2ea0a7
DM
1909static inline void netif_tx_stop_all_queues(struct net_device *dev)
1910{
1911 unsigned int i;
1912
1913 for (i = 0; i < dev->num_tx_queues; i++) {
1914 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1915 netif_tx_stop_queue(txq);
1916 }
1917}
1918
4d29515f 1919static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
d29f749e 1920{
73466498 1921 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
d29f749e
DJ
1922}
1923
bea3348e
SH
1924/**
1925 * netif_queue_stopped - test if transmit queue is flowblocked
1926 * @dev: network device
1927 *
1928 * Test if transmit queue on device is currently unable to send.
1929 */
4d29515f 1930static inline bool netif_queue_stopped(const struct net_device *dev)
1da177e4 1931{
e8a0464c 1932 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1da177e4
LT
1933}
1934
4d29515f 1935static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
c3f26a26 1936{
73466498
TH
1937 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
1938}
1939
4d29515f 1940static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
73466498
TH
1941{
1942 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
1943}
1944
c5d67bd7
TH
1945static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
1946 unsigned int bytes)
1947{
114cf580
TH
1948#ifdef CONFIG_BQL
1949 dql_queued(&dev_queue->dql, bytes);
b37c0fbe
AD
1950
1951 if (likely(dql_avail(&dev_queue->dql) >= 0))
1952 return;
1953
1954 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
1955
1956 /*
1957 * The XOFF flag must be set before checking the dql_avail below,
1958 * because in netdev_tx_completed_queue we update the dql_completed
1959 * before checking the XOFF flag.
1960 */
1961 smp_mb();
1962
1963 /* check again in case another CPU has just made room avail */
1964 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
1965 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
114cf580 1966#endif
c5d67bd7
TH
1967}
1968
1969static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
1970{
1971 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
1972}
1973
1974static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
95c96174 1975 unsigned int pkts, unsigned int bytes)
c5d67bd7 1976{
114cf580 1977#ifdef CONFIG_BQL
b37c0fbe
AD
1978 if (unlikely(!bytes))
1979 return;
1980
1981 dql_completed(&dev_queue->dql, bytes);
1982
1983 /*
1984 * Without the memory barrier there is a small possiblity that
1985 * netdev_tx_sent_queue will miss the update and cause the queue to
1986 * be stopped forever
1987 */
1988 smp_mb();
1989
1990 if (dql_avail(&dev_queue->dql) < 0)
1991 return;
1992
1993 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
1994 netif_schedule_queue(dev_queue);
114cf580 1995#endif
c5d67bd7
TH
1996}
1997
1998static inline void netdev_completed_queue(struct net_device *dev,
95c96174 1999 unsigned int pkts, unsigned int bytes)
c5d67bd7
TH
2000{
2001 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
2002}
2003
2004static inline void netdev_tx_reset_queue(struct netdev_queue *q)
2005{
114cf580 2006#ifdef CONFIG_BQL
5c490354 2007 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
114cf580
TH
2008 dql_reset(&q->dql);
2009#endif
c5d67bd7
TH
2010}
2011
2012static inline void netdev_reset_queue(struct net_device *dev_queue)
2013{
2014 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
c3f26a26
DM
2015}
2016
bea3348e
SH
2017/**
2018 * netif_running - test if up
2019 * @dev: network device
2020 *
2021 * Test if the device has been brought up.
2022 */
4d29515f 2023static inline bool netif_running(const struct net_device *dev)
1da177e4
LT
2024{
2025 return test_bit(__LINK_STATE_START, &dev->state);
2026}
2027
f25f4e44
PWJ
2028/*
2029 * Routines to manage the subqueues on a device. We only need start
2030 * stop, and a check if it's stopped. All other device management is
2031 * done at the overall netdevice level.
2032 * Also test the device if we're multiqueue.
2033 */
bea3348e
SH
2034
2035/**
2036 * netif_start_subqueue - allow sending packets on subqueue
2037 * @dev: network device
2038 * @queue_index: sub queue index
2039 *
2040 * Start individual transmit queue of a device with multiple transmit queues.
2041 */
f25f4e44
PWJ
2042static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
2043{
fd2ea0a7 2044 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
7b3d3e4f
KK
2045
2046 netif_tx_start_queue(txq);
f25f4e44
PWJ
2047}
2048
bea3348e
SH
2049/**
2050 * netif_stop_subqueue - stop sending packets on subqueue
2051 * @dev: network device
2052 * @queue_index: sub queue index
2053 *
2054 * Stop individual transmit queue of a device with multiple transmit queues.
2055 */
f25f4e44
PWJ
2056static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
2057{
fd2ea0a7 2058 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
f25f4e44
PWJ
2059#ifdef CONFIG_NETPOLL_TRAP
2060 if (netpoll_trap())
2061 return;
2062#endif
7b3d3e4f 2063 netif_tx_stop_queue(txq);
f25f4e44
PWJ
2064}
2065
bea3348e
SH
2066/**
2067 * netif_subqueue_stopped - test status of subqueue
2068 * @dev: network device
2069 * @queue_index: sub queue index
2070 *
2071 * Check individual transmit queue of a device with multiple transmit queues.
2072 */
4d29515f
DM
2073static inline bool __netif_subqueue_stopped(const struct net_device *dev,
2074 u16 queue_index)
f25f4e44 2075{
fd2ea0a7 2076 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
7b3d3e4f
KK
2077
2078 return netif_tx_queue_stopped(txq);
f25f4e44
PWJ
2079}
2080
4d29515f
DM
2081static inline bool netif_subqueue_stopped(const struct net_device *dev,
2082 struct sk_buff *skb)
668f895a
PE
2083{
2084 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
2085}
bea3348e
SH
2086
2087/**
2088 * netif_wake_subqueue - allow sending packets on subqueue
2089 * @dev: network device
2090 * @queue_index: sub queue index
2091 *
2092 * Resume individual transmit queue of a device with multiple transmit queues.
2093 */
f25f4e44
PWJ
2094static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
2095{
fd2ea0a7 2096 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
f25f4e44
PWJ
2097#ifdef CONFIG_NETPOLL_TRAP
2098 if (netpoll_trap())
2099 return;
2100#endif
73466498 2101 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state))
37437bb2 2102 __netif_schedule(txq->qdisc);
f25f4e44
PWJ
2103}
2104
a3d22a68
VZ
2105/*
2106 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2107 * as a distribution range limit for the returned value.
2108 */
2109static inline u16 skb_tx_hash(const struct net_device *dev,
2110 const struct sk_buff *skb)
2111{
2112 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
2113}
2114
bea3348e
SH
2115/**
2116 * netif_is_multiqueue - test if device has multiple transmit queues
2117 * @dev: network device
2118 *
2119 * Check if device has multiple transmit queues
bea3348e 2120 */
4d29515f 2121static inline bool netif_is_multiqueue(const struct net_device *dev)
f25f4e44 2122{
a02cec21 2123 return dev->num_tx_queues > 1;
f25f4e44 2124}
1da177e4 2125
e6484930
TH
2126extern int netif_set_real_num_tx_queues(struct net_device *dev,
2127 unsigned int txq);
f0796d5c 2128
62fe0b40
BH
2129#ifdef CONFIG_RPS
2130extern int netif_set_real_num_rx_queues(struct net_device *dev,
2131 unsigned int rxq);
2132#else
2133static inline int netif_set_real_num_rx_queues(struct net_device *dev,
2134 unsigned int rxq)
2135{
2136 return 0;
2137}
2138#endif
2139
3171d026
BH
2140static inline int netif_copy_real_num_queues(struct net_device *to_dev,
2141 const struct net_device *from_dev)
2142{
ee6ae1a1
JP
2143 int err;
2144
2145 err = netif_set_real_num_tx_queues(to_dev,
2146 from_dev->real_num_tx_queues);
2147 if (err)
2148 return err;
3171d026
BH
2149#ifdef CONFIG_RPS
2150 return netif_set_real_num_rx_queues(to_dev,
2151 from_dev->real_num_rx_queues);
2152#else
2153 return 0;
2154#endif
2155}
2156
16917b87
YM
2157#define DEFAULT_MAX_NUM_RSS_QUEUES (8)
2158extern int netif_get_num_default_rss_queues(void);
2159
1da177e4 2160/* Use this variant when it is known for sure that it
0ef47309
ML
2161 * is executing from hardware interrupt context or with hardware interrupts
2162 * disabled.
1da177e4 2163 */
bea3348e 2164extern void dev_kfree_skb_irq(struct sk_buff *skb);
1da177e4
LT
2165
2166/* Use this variant in places where it could be invoked
0ef47309
ML
2167 * from either hardware interrupt or other context, with hardware interrupts
2168 * either disabled or enabled.
1da177e4 2169 */
56079431 2170extern void dev_kfree_skb_any(struct sk_buff *skb);
1da177e4 2171
1da177e4
LT
2172extern int netif_rx(struct sk_buff *skb);
2173extern int netif_rx_ni(struct sk_buff *skb);
1da177e4 2174extern int netif_receive_skb(struct sk_buff *skb);
c7c4b3b6 2175extern gro_result_t napi_gro_receive(struct napi_struct *napi,
d565b0a1 2176 struct sk_buff *skb);
2e71a6f8 2177extern void napi_gro_flush(struct napi_struct *napi, bool flush_old);
76620aaf 2178extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
c7c4b3b6 2179extern gro_result_t napi_gro_frags(struct napi_struct *napi);
76620aaf
HX
2180
2181static inline void napi_free_frags(struct napi_struct *napi)
2182{
2183 kfree_skb(napi->skb);
2184 napi->skb = NULL;
2185}
2186
ab95bfe0 2187extern int netdev_rx_handler_register(struct net_device *dev,
93e2c32b
JP
2188 rx_handler_func_t *rx_handler,
2189 void *rx_handler_data);
ab95bfe0
JP
2190extern void netdev_rx_handler_unregister(struct net_device *dev);
2191
95f050bf 2192extern bool dev_valid_name(const char *name);
881d966b
EB
2193extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
2194extern int dev_ethtool(struct net *net, struct ifreq *);
95c96174 2195extern unsigned int dev_get_flags(const struct net_device *);
bd380811 2196extern int __dev_change_flags(struct net_device *, unsigned int flags);
95c96174 2197extern int dev_change_flags(struct net_device *, unsigned int);
bd380811 2198extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
cf04a4c7 2199extern int dev_change_name(struct net_device *, const char *);
0b815a1a 2200extern int dev_set_alias(struct net_device *, const char *, size_t);
ce286d32
EB
2201extern int dev_change_net_namespace(struct net_device *,
2202 struct net *, const char *);
1da177e4 2203extern int dev_set_mtu(struct net_device *, int);
cbda10fa 2204extern void dev_set_group(struct net_device *, int);
1da177e4
LT
2205extern int dev_set_mac_address(struct net_device *,
2206 struct sockaddr *);
4bf84c35
JP
2207extern int dev_change_carrier(struct net_device *,
2208 bool new_carrier);
f6a78bfc 2209extern int dev_hard_start_xmit(struct sk_buff *skb,
fd2ea0a7
DM
2210 struct net_device *dev,
2211 struct netdev_queue *txq);
44540960
AB
2212extern int dev_forward_skb(struct net_device *dev,
2213 struct sk_buff *skb);
1da177e4 2214
20380731 2215extern int netdev_budget;
1da177e4
LT
2216
2217/* Called by rtnetlink.c:rtnl_unlock() */
2218extern void netdev_run_todo(void);
2219
bea3348e
SH
2220/**
2221 * dev_put - release reference to device
2222 * @dev: network device
2223 *
9ef4429b 2224 * Release reference to device to allow it to be freed.
bea3348e 2225 */
1da177e4
LT
2226static inline void dev_put(struct net_device *dev)
2227{
933393f5 2228 this_cpu_dec(*dev->pcpu_refcnt);
1da177e4
LT
2229}
2230
bea3348e
SH
2231/**
2232 * dev_hold - get reference to device
2233 * @dev: network device
2234 *
9ef4429b 2235 * Hold reference to device to keep it from being freed.
bea3348e 2236 */
15333061
SH
2237static inline void dev_hold(struct net_device *dev)
2238{
933393f5 2239 this_cpu_inc(*dev->pcpu_refcnt);
15333061 2240}
1da177e4
LT
2241
2242/* Carrier loss detection, dial on demand. The functions netif_carrier_on
2243 * and _off may be called from IRQ context, but it is caller
2244 * who is responsible for serialization of these calls.
b00055aa
SR
2245 *
2246 * The name carrier is inappropriate, these functions should really be
2247 * called netif_lowerlayer_*() because they represent the state of any
2248 * kind of lower layer not just hardware media.
1da177e4
LT
2249 */
2250
8f4cccbb 2251extern void linkwatch_init_dev(struct net_device *dev);
1da177e4 2252extern void linkwatch_fire_event(struct net_device *dev);
e014debe 2253extern void linkwatch_forget_dev(struct net_device *dev);
1da177e4 2254
bea3348e
SH
2255/**
2256 * netif_carrier_ok - test if carrier present
2257 * @dev: network device
2258 *
2259 * Check if carrier is present on device
2260 */
4d29515f 2261static inline bool netif_carrier_ok(const struct net_device *dev)
1da177e4
LT
2262{
2263 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
2264}
2265
9d21493b
ED
2266extern unsigned long dev_trans_start(struct net_device *dev);
2267
1da177e4
LT
2268extern void __netdev_watchdog_up(struct net_device *dev);
2269
0a242efc 2270extern void netif_carrier_on(struct net_device *dev);
1da177e4 2271
0a242efc 2272extern void netif_carrier_off(struct net_device *dev);
1da177e4 2273
bea3348e
SH
2274/**
2275 * netif_dormant_on - mark device as dormant.
2276 * @dev: network device
2277 *
2278 * Mark device as dormant (as per RFC2863).
2279 *
2280 * The dormant state indicates that the relevant interface is not
2281 * actually in a condition to pass packets (i.e., it is not 'up') but is
2282 * in a "pending" state, waiting for some external event. For "on-
2283 * demand" interfaces, this new state identifies the situation where the
2284 * interface is waiting for events to place it in the up state.
2285 *
2286 */
b00055aa
SR
2287static inline void netif_dormant_on(struct net_device *dev)
2288{
2289 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
2290 linkwatch_fire_event(dev);
2291}
2292
bea3348e
SH
2293/**
2294 * netif_dormant_off - set device as not dormant.
2295 * @dev: network device
2296 *
2297 * Device is not in dormant state.
2298 */
b00055aa
SR
2299static inline void netif_dormant_off(struct net_device *dev)
2300{
2301 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
2302 linkwatch_fire_event(dev);
2303}
2304
bea3348e
SH
2305/**
2306 * netif_dormant - test if carrier present
2307 * @dev: network device
2308 *
2309 * Check if carrier is present on device
2310 */
4d29515f 2311static inline bool netif_dormant(const struct net_device *dev)
b00055aa
SR
2312{
2313 return test_bit(__LINK_STATE_DORMANT, &dev->state);
2314}
2315
2316
bea3348e
SH
2317/**
2318 * netif_oper_up - test if device is operational
2319 * @dev: network device
2320 *
2321 * Check if carrier is operational
2322 */
4d29515f 2323static inline bool netif_oper_up(const struct net_device *dev)
d94d9fee 2324{
b00055aa
SR
2325 return (dev->operstate == IF_OPER_UP ||
2326 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
2327}
2328
bea3348e
SH
2329/**
2330 * netif_device_present - is device available or removed
2331 * @dev: network device
2332 *
2333 * Check if device has not been removed from system.
2334 */
4d29515f 2335static inline bool netif_device_present(struct net_device *dev)
1da177e4
LT
2336{
2337 return test_bit(__LINK_STATE_PRESENT, &dev->state);
2338}
2339
56079431 2340extern void netif_device_detach(struct net_device *dev);
1da177e4 2341
56079431 2342extern void netif_device_attach(struct net_device *dev);
1da177e4
LT
2343
2344/*
2345 * Network interface message level settings
2346 */
1da177e4
LT
2347
2348enum {
2349 NETIF_MSG_DRV = 0x0001,
2350 NETIF_MSG_PROBE = 0x0002,
2351 NETIF_MSG_LINK = 0x0004,
2352 NETIF_MSG_TIMER = 0x0008,
2353 NETIF_MSG_IFDOWN = 0x0010,
2354 NETIF_MSG_IFUP = 0x0020,
2355 NETIF_MSG_RX_ERR = 0x0040,
2356 NETIF_MSG_TX_ERR = 0x0080,
2357 NETIF_MSG_TX_QUEUED = 0x0100,
2358 NETIF_MSG_INTR = 0x0200,
2359 NETIF_MSG_TX_DONE = 0x0400,
2360 NETIF_MSG_RX_STATUS = 0x0800,
2361 NETIF_MSG_PKTDATA = 0x1000,
2362 NETIF_MSG_HW = 0x2000,
2363 NETIF_MSG_WOL = 0x4000,
2364};
2365
2366#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2367#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2368#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2369#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2370#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2371#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2372#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2373#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2374#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2375#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2376#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2377#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2378#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2379#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2380#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2381
2382static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
2383{
2384 /* use default */
2385 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
2386 return default_msg_enable_bits;
2387 if (debug_value == 0) /* no output */
2388 return 0;
2389 /* set low N bits */
2390 return (1 << debug_value) - 1;
2391}
2392
c773e847 2393static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
932ff279 2394{
c773e847
DM
2395 spin_lock(&txq->_xmit_lock);
2396 txq->xmit_lock_owner = cpu;
22dd7495
JHS
2397}
2398
fd2ea0a7
DM
2399static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
2400{
2401 spin_lock_bh(&txq->_xmit_lock);
2402 txq->xmit_lock_owner = smp_processor_id();
2403}
2404
4d29515f 2405static inline bool __netif_tx_trylock(struct netdev_queue *txq)
c3f26a26 2406{
4d29515f 2407 bool ok = spin_trylock(&txq->_xmit_lock);
c3f26a26
DM
2408 if (likely(ok))
2409 txq->xmit_lock_owner = smp_processor_id();
2410 return ok;
2411}
2412
2413static inline void __netif_tx_unlock(struct netdev_queue *txq)
2414{
2415 txq->xmit_lock_owner = -1;
2416 spin_unlock(&txq->_xmit_lock);
2417}
2418
2419static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
2420{
2421 txq->xmit_lock_owner = -1;
2422 spin_unlock_bh(&txq->_xmit_lock);
2423}
2424
08baf561
ED
2425static inline void txq_trans_update(struct netdev_queue *txq)
2426{
2427 if (txq->xmit_lock_owner != -1)
2428 txq->trans_start = jiffies;
2429}
2430
d29f749e
DJ
2431/**
2432 * netif_tx_lock - grab network device transmit lock
2433 * @dev: network device
d29f749e
DJ
2434 *
2435 * Get network device transmit lock
2436 */
22dd7495
JHS
2437static inline void netif_tx_lock(struct net_device *dev)
2438{
e8a0464c 2439 unsigned int i;
c3f26a26 2440 int cpu;
c773e847 2441
c3f26a26
DM
2442 spin_lock(&dev->tx_global_lock);
2443 cpu = smp_processor_id();
e8a0464c
DM
2444 for (i = 0; i < dev->num_tx_queues; i++) {
2445 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
c3f26a26
DM
2446
2447 /* We are the only thread of execution doing a
2448 * freeze, but we have to grab the _xmit_lock in
2449 * order to synchronize with threads which are in
2450 * the ->hard_start_xmit() handler and already
2451 * checked the frozen bit.
2452 */
e8a0464c 2453 __netif_tx_lock(txq, cpu);
c3f26a26
DM
2454 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
2455 __netif_tx_unlock(txq);
e8a0464c 2456 }
932ff279
HX
2457}
2458
2459static inline void netif_tx_lock_bh(struct net_device *dev)
2460{
e8a0464c
DM
2461 local_bh_disable();
2462 netif_tx_lock(dev);
932ff279
HX
2463}
2464
932ff279
HX
2465static inline void netif_tx_unlock(struct net_device *dev)
2466{
e8a0464c
DM
2467 unsigned int i;
2468
2469 for (i = 0; i < dev->num_tx_queues; i++) {
2470 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
c773e847 2471
c3f26a26
DM
2472 /* No need to grab the _xmit_lock here. If the
2473 * queue is not stopped for another reason, we
2474 * force a schedule.
2475 */
2476 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
7b3d3e4f 2477 netif_schedule_queue(txq);
c3f26a26
DM
2478 }
2479 spin_unlock(&dev->tx_global_lock);
932ff279
HX
2480}
2481
2482static inline void netif_tx_unlock_bh(struct net_device *dev)
2483{
e8a0464c
DM
2484 netif_tx_unlock(dev);
2485 local_bh_enable();
932ff279
HX
2486}
2487
c773e847 2488#define HARD_TX_LOCK(dev, txq, cpu) { \
22dd7495 2489 if ((dev->features & NETIF_F_LLTX) == 0) { \
c773e847 2490 __netif_tx_lock(txq, cpu); \
22dd7495
JHS
2491 } \
2492}
2493
c773e847 2494#define HARD_TX_UNLOCK(dev, txq) { \
22dd7495 2495 if ((dev->features & NETIF_F_LLTX) == 0) { \
c773e847 2496 __netif_tx_unlock(txq); \
22dd7495
JHS
2497 } \
2498}
2499
1da177e4
LT
2500static inline void netif_tx_disable(struct net_device *dev)
2501{
fd2ea0a7 2502 unsigned int i;
c3f26a26 2503 int cpu;
fd2ea0a7 2504
c3f26a26
DM
2505 local_bh_disable();
2506 cpu = smp_processor_id();
fd2ea0a7
DM
2507 for (i = 0; i < dev->num_tx_queues; i++) {
2508 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
c3f26a26
DM
2509
2510 __netif_tx_lock(txq, cpu);
fd2ea0a7 2511 netif_tx_stop_queue(txq);
c3f26a26 2512 __netif_tx_unlock(txq);
fd2ea0a7 2513 }
c3f26a26 2514 local_bh_enable();
1da177e4
LT
2515}
2516
e308a5d8
DM
2517static inline void netif_addr_lock(struct net_device *dev)
2518{
2519 spin_lock(&dev->addr_list_lock);
2520}
2521
2429f7ac
JP
2522static inline void netif_addr_lock_nested(struct net_device *dev)
2523{
2524 spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING);
2525}
2526
e308a5d8
DM
2527static inline void netif_addr_lock_bh(struct net_device *dev)
2528{
2529 spin_lock_bh(&dev->addr_list_lock);
2530}
2531
2532static inline void netif_addr_unlock(struct net_device *dev)
2533{
2534 spin_unlock(&dev->addr_list_lock);
2535}
2536
2537static inline void netif_addr_unlock_bh(struct net_device *dev)
2538{
2539 spin_unlock_bh(&dev->addr_list_lock);
2540}
2541
f001fde5 2542/*
31278e71 2543 * dev_addrs walker. Should be used only for read access. Call with
f001fde5
JP
2544 * rcu_read_lock held.
2545 */
2546#define for_each_dev_addr(dev, ha) \
31278e71 2547 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
f001fde5 2548
1da177e4
LT
2549/* These functions live elsewhere (drivers/net/net_init.c, but related) */
2550
2551extern void ether_setup(struct net_device *dev);
2552
2553/* Support for loadable net-drivers */
36909ea4 2554extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
f25f4e44 2555 void (*setup)(struct net_device *),
36909ea4 2556 unsigned int txqs, unsigned int rxqs);
f25f4e44 2557#define alloc_netdev(sizeof_priv, name, setup) \
36909ea4
TH
2558 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2559
2560#define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2561 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2562
1da177e4
LT
2563extern int register_netdev(struct net_device *dev);
2564extern void unregister_netdev(struct net_device *dev);
f001fde5 2565
22bedad3
JP
2566/* General hardware address lists handling functions */
2567extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
2568 struct netdev_hw_addr_list *from_list,
2569 int addr_len, unsigned char addr_type);
2570extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
2571 struct netdev_hw_addr_list *from_list,
2572 int addr_len, unsigned char addr_type);
2573extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
2574 struct netdev_hw_addr_list *from_list,
2575 int addr_len);
2576extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
2577 struct netdev_hw_addr_list *from_list,
2578 int addr_len);
2579extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
2580extern void __hw_addr_init(struct netdev_hw_addr_list *list);
2581
f001fde5 2582/* Functions used for device addresses handling */
6b6e2725 2583extern int dev_addr_add(struct net_device *dev, const unsigned char *addr,
f001fde5 2584 unsigned char addr_type);
6b6e2725 2585extern int dev_addr_del(struct net_device *dev, const unsigned char *addr,
f001fde5
JP
2586 unsigned char addr_type);
2587extern int dev_addr_add_multiple(struct net_device *to_dev,
2588 struct net_device *from_dev,
2589 unsigned char addr_type);
2590extern int dev_addr_del_multiple(struct net_device *to_dev,
2591 struct net_device *from_dev,
2592 unsigned char addr_type);
a748ee24
JP
2593extern void dev_addr_flush(struct net_device *dev);
2594extern int dev_addr_init(struct net_device *dev);
2595
2596/* Functions used for unicast addresses handling */
6b6e2725 2597extern int dev_uc_add(struct net_device *dev, const unsigned char *addr);
2598extern int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
2599extern int dev_uc_del(struct net_device *dev, const unsigned char *addr);
a748ee24
JP
2600extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2601extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
2602extern void dev_uc_flush(struct net_device *dev);
2603extern void dev_uc_init(struct net_device *dev);
f001fde5 2604
22bedad3 2605/* Functions used for multicast addresses handling */
6b6e2725 2606extern int dev_mc_add(struct net_device *dev, const unsigned char *addr);
2607extern int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
2608extern int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
2609extern int dev_mc_del(struct net_device *dev, const unsigned char *addr);
2610extern int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
22bedad3
JP
2611extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2612extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
2613extern void dev_mc_flush(struct net_device *dev);
2614extern void dev_mc_init(struct net_device *dev);
f001fde5 2615
4417da66
PM
2616/* Functions used for secondary unicast and multicast support */
2617extern void dev_set_rx_mode(struct net_device *dev);
2618extern void __dev_set_rx_mode(struct net_device *dev);
dad9b335
WC
2619extern int dev_set_promiscuity(struct net_device *dev, int inc);
2620extern int dev_set_allmulti(struct net_device *dev, int inc);
1da177e4 2621extern void netdev_state_change(struct net_device *dev);
ee89bab1 2622extern void netdev_notify_peers(struct net_device *dev);
d8a33ac4 2623extern void netdev_features_change(struct net_device *dev);
1da177e4 2624/* Load a device via the kmod */
881d966b 2625extern void dev_load(struct net *net, const char *name);
1da177e4 2626extern void dev_mcast_init(void);
d7753516
BH
2627extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
2628 struct rtnl_link_stats64 *storage);
77a1abf5
ED
2629extern void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
2630 const struct net_device_stats *netdev_stats);
eeda3fd6 2631
1da177e4 2632extern int netdev_max_backlog;
3b098e2d 2633extern int netdev_tstamp_prequeue;
1da177e4 2634extern int weight_p;
0a14842f 2635extern int bpf_jit_enable;
1da177e4 2636extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1765a575
JP
2637extern int netdev_set_bond_master(struct net_device *dev,
2638 struct net_device *master);
84fa7933 2639extern int skb_checksum_help(struct sk_buff *skb);
c8f44aff
MM
2640extern struct sk_buff *skb_gso_segment(struct sk_buff *skb,
2641 netdev_features_t features);
fb286bb2
HX
2642#ifdef CONFIG_BUG
2643extern void netdev_rx_csum_fault(struct net_device *dev);
2644#else
2645static inline void netdev_rx_csum_fault(struct net_device *dev)
2646{
2647}
2648#endif
1da177e4
LT
2649/* rx skb timestamps */
2650extern void net_enable_timestamp(void);
2651extern void net_disable_timestamp(void);
2652
20380731
ACM
2653#ifdef CONFIG_PROC_FS
2654extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
2655extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
2656extern void dev_seq_stop(struct seq_file *seq, void *v);
2657#endif
2658
b8a9787e
JV
2659extern int netdev_class_create_file(struct class_attribute *class_attr);
2660extern void netdev_class_remove_file(struct class_attribute *class_attr);
2661
04600794
JB
2662extern struct kobj_ns_type_operations net_ns_type_operations;
2663
3019de12 2664extern const char *netdev_drivername(const struct net_device *dev);
6579e57b 2665
20380731
ACM
2666extern void linkwatch_run_queue(void);
2667
c8f44aff
MM
2668static inline netdev_features_t netdev_get_wanted_features(
2669 struct net_device *dev)
5455c699
MM
2670{
2671 return (dev->features & ~dev->hw_features) | dev->wanted_features;
2672}
c8f44aff
MM
2673netdev_features_t netdev_increment_features(netdev_features_t all,
2674 netdev_features_t one, netdev_features_t mask);
6cb6a27c 2675int __netdev_update_features(struct net_device *dev);
5455c699 2676void netdev_update_features(struct net_device *dev);
afe12cc8 2677void netdev_change_features(struct net_device *dev);
7f353bf2 2678
fc4a7489
PM
2679void netif_stacked_transfer_operstate(const struct net_device *rootdev,
2680 struct net_device *dev);
2681
c8f44aff 2682netdev_features_t netif_skb_features(struct sk_buff *skb);
58e998c6 2683
4d29515f 2684static inline bool net_gso_ok(netdev_features_t features, int gso_type)
576a30eb 2685{
c8f44aff 2686 netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT;
0345e186
MM
2687
2688 /* check flags correspondence */
2689 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
2690 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT));
2691 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
2692 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
2693 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
2694 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
2695
d6b4991a 2696 return (features & feature) == feature;
576a30eb
HX
2697}
2698
4d29515f 2699static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
bcd76111 2700{
278b2513 2701 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
21dc3301 2702 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
bcd76111
HX
2703}
2704
4d29515f
DM
2705static inline bool netif_needs_gso(struct sk_buff *skb,
2706 netdev_features_t features)
7967168c 2707{
fc741216 2708 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
cdbee74c
YZ
2709 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
2710 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
7967168c
HX
2711}
2712
82cc1a7a
PWJ
2713static inline void netif_set_gso_max_size(struct net_device *dev,
2714 unsigned int size)
2715{
2716 dev->gso_max_size = size;
2717}
2718
4d29515f 2719static inline bool netif_is_bond_slave(struct net_device *dev)
1765a575
JP
2720{
2721 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
2722}
2723
3bdc0eba
BG
2724static inline bool netif_supports_nofcs(struct net_device *dev)
2725{
2726 return dev->priv_flags & IFF_SUPP_NOFCS;
2727}
2728
505d4f73 2729extern struct pernet_operations __net_initdata loopback_net_ops;
b1b67dd4 2730
571ba423
JP
2731/* Logging, debugging and troubleshooting/diagnostic helpers. */
2732
2733/* netdev_printk helpers, similar to dev_printk */
2734
2735static inline const char *netdev_name(const struct net_device *dev)
2736{
2737 if (dev->reg_state != NETREG_REGISTERED)
2738 return "(unregistered net_device)";
2739 return dev->name;
2740}
2741
b9075fa9
JP
2742extern __printf(3, 4)
2743int netdev_printk(const char *level, const struct net_device *dev,
2744 const char *format, ...);
2745extern __printf(2, 3)
2746int netdev_emerg(const struct net_device *dev, const char *format, ...);
2747extern __printf(2, 3)
2748int netdev_alert(const struct net_device *dev, const char *format, ...);
2749extern __printf(2, 3)
2750int netdev_crit(const struct net_device *dev, const char *format, ...);
2751extern __printf(2, 3)
2752int netdev_err(const struct net_device *dev, const char *format, ...);
2753extern __printf(2, 3)
2754int netdev_warn(const struct net_device *dev, const char *format, ...);
2755extern __printf(2, 3)
2756int netdev_notice(const struct net_device *dev, const char *format, ...);
2757extern __printf(2, 3)
2758int netdev_info(const struct net_device *dev, const char *format, ...);
571ba423 2759
8909c9ad
VK
2760#define MODULE_ALIAS_NETDEV(device) \
2761 MODULE_ALIAS("netdev-" device)
2762
b558c96f 2763#if defined(CONFIG_DYNAMIC_DEBUG)
571ba423
JP
2764#define netdev_dbg(__dev, format, args...) \
2765do { \
ffa10cb4 2766 dynamic_netdev_dbg(__dev, format, ##args); \
571ba423 2767} while (0)
b558c96f
JC
2768#elif defined(DEBUG)
2769#define netdev_dbg(__dev, format, args...) \
2770 netdev_printk(KERN_DEBUG, __dev, format, ##args)
571ba423
JP
2771#else
2772#define netdev_dbg(__dev, format, args...) \
2773({ \
2774 if (0) \
2775 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2776 0; \
2777})
2778#endif
2779
2780#if defined(VERBOSE_DEBUG)
2781#define netdev_vdbg netdev_dbg
2782#else
2783
2784#define netdev_vdbg(dev, format, args...) \
2785({ \
2786 if (0) \
2787 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2788 0; \
2789})
2790#endif
2791
2792/*
2793 * netdev_WARN() acts like dev_printk(), but with the key difference
2794 * of using a WARN/WARN_ON to get the message out, including the
2795 * file/line information and a backtrace.
2796 */
2797#define netdev_WARN(dev, format, args...) \
2798 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2799
b3d95c5c
JP
2800/* netif printk helpers, similar to netdev_printk */
2801
2802#define netif_printk(priv, type, level, dev, fmt, args...) \
2803do { \
2804 if (netif_msg_##type(priv)) \
2805 netdev_printk(level, (dev), fmt, ##args); \
2806} while (0)
2807
f45f4321
JP
2808#define netif_level(level, priv, type, dev, fmt, args...) \
2809do { \
2810 if (netif_msg_##type(priv)) \
2811 netdev_##level(dev, fmt, ##args); \
2812} while (0)
2813
b3d95c5c 2814#define netif_emerg(priv, type, dev, fmt, args...) \
f45f4321 2815 netif_level(emerg, priv, type, dev, fmt, ##args)
b3d95c5c 2816#define netif_alert(priv, type, dev, fmt, args...) \
f45f4321 2817 netif_level(alert, priv, type, dev, fmt, ##args)
b3d95c5c 2818#define netif_crit(priv, type, dev, fmt, args...) \
f45f4321 2819 netif_level(crit, priv, type, dev, fmt, ##args)
b3d95c5c 2820#define netif_err(priv, type, dev, fmt, args...) \
f45f4321 2821 netif_level(err, priv, type, dev, fmt, ##args)
b3d95c5c 2822#define netif_warn(priv, type, dev, fmt, args...) \
f45f4321 2823 netif_level(warn, priv, type, dev, fmt, ##args)
b3d95c5c 2824#define netif_notice(priv, type, dev, fmt, args...) \
f45f4321 2825 netif_level(notice, priv, type, dev, fmt, ##args)
b3d95c5c 2826#define netif_info(priv, type, dev, fmt, args...) \
f45f4321 2827 netif_level(info, priv, type, dev, fmt, ##args)
b3d95c5c 2828
0053ea9c 2829#if defined(CONFIG_DYNAMIC_DEBUG)
b3d95c5c
JP
2830#define netif_dbg(priv, type, netdev, format, args...) \
2831do { \
2832 if (netif_msg_##type(priv)) \
b5fb0a03 2833 dynamic_netdev_dbg(netdev, format, ##args); \
b3d95c5c 2834} while (0)
0053ea9c
JP
2835#elif defined(DEBUG)
2836#define netif_dbg(priv, type, dev, format, args...) \
2837 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
b3d95c5c
JP
2838#else
2839#define netif_dbg(priv, type, dev, format, args...) \
2840({ \
2841 if (0) \
2842 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2843 0; \
2844})
2845#endif
2846
2847#if defined(VERBOSE_DEBUG)
bcfcc450 2848#define netif_vdbg netif_dbg
b3d95c5c
JP
2849#else
2850#define netif_vdbg(priv, type, dev, format, args...) \
2851({ \
2852 if (0) \
a4ed89cb 2853 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
b3d95c5c
JP
2854 0; \
2855})
2856#endif
571ba423 2857
385a154c 2858#endif /* _LINUX_NETDEVICE_H */
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