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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
28#include <linux/if.h>
29#include <linux/if_ether.h>
30#include <linux/if_packet.h>
95c26df8 31#include <linux/if_link.h>
1da177e4
LT
32
33#ifdef __KERNEL__
ed77134b 34#include <linux/pm_qos_params.h>
d7fe0f24 35#include <linux/timer.h>
bea3348e 36#include <linux/delay.h>
cc0be322 37#include <linux/mm.h>
1da177e4
LT
38#include <asm/atomic.h>
39#include <asm/cache.h>
40#include <asm/byteorder.h>
41
1da177e4
LT
42#include <linux/device.h>
43#include <linux/percpu.h>
4d5b78c0 44#include <linux/rculist.h>
db217334 45#include <linux/dmaengine.h>
bea3348e 46#include <linux/workqueue.h>
1da177e4 47
b1b67dd4 48#include <linux/ethtool.h>
a050c33f 49#include <net/net_namespace.h>
cf85d08f 50#include <net/dsa.h>
7a6b6f51 51#ifdef CONFIG_DCB
2f90b865
AD
52#include <net/dcbnl.h>
53#endif
a050c33f 54
1da177e4 55struct vlan_group;
115c1d6e 56struct netpoll_info;
c1f19b51 57struct phy_device;
704232c2
JB
58/* 802.11 specific */
59struct wireless_dev;
1da177e4
LT
60 /* source back-compat hooks */
61#define SET_ETHTOOL_OPS(netdev,ops) \
62 ( (netdev)->ethtool_ops = (ops) )
63
64#define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
65 functions are available. */
66#define HAVE_FREE_NETDEV /* free_netdev() */
67#define HAVE_NETDEV_PRIV /* netdev_priv() */
68
c1f79426
SA
69/* hardware address assignment types */
70#define NET_ADDR_PERM 0 /* address is permanent (default) */
71#define NET_ADDR_RANDOM 1 /* address is generated randomly */
72#define NET_ADDR_STOLEN 2 /* address is stolen from other device */
73
9a1654ba
JP
74/* Backlog congestion levels */
75#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
76#define NET_RX_DROP 1 /* packet dropped */
77
572a9d7b
PM
78/*
79 * Transmit return codes: transmit return codes originate from three different
80 * namespaces:
81 *
82 * - qdisc return codes
83 * - driver transmit return codes
84 * - errno values
85 *
86 * Drivers are allowed to return any one of those in their hard_start_xmit()
87 * function. Real network devices commonly used with qdiscs should only return
88 * the driver transmit return codes though - when qdiscs are used, the actual
89 * transmission happens asynchronously, so the value is not propagated to
90 * higher layers. Virtual network devices transmit synchronously, in this case
91 * the driver transmit return codes are consumed by dev_queue_xmit(), all
92 * others are propagated to higher layers.
93 */
94
95/* qdisc ->enqueue() return codes. */
96#define NET_XMIT_SUCCESS 0x00
9a1654ba
JP
97#define NET_XMIT_DROP 0x01 /* skb dropped */
98#define NET_XMIT_CN 0x02 /* congestion notification */
99#define NET_XMIT_POLICED 0x03 /* skb is shot by police */
100#define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
1da177e4 101
b9df3cb8
GR
102/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
103 * indicates that the device will soon be dropping packets, or already drops
104 * some packets of the same priority; prompting us to send less aggressively. */
572a9d7b 105#define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
1da177e4
LT
106#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
107
dc1f8bf6 108/* Driver transmit return codes */
9a1654ba 109#define NETDEV_TX_MASK 0xf0
572a9d7b 110
dc1f8bf6 111enum netdev_tx {
572a9d7b 112 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
9a1654ba
JP
113 NETDEV_TX_OK = 0x00, /* driver took care of packet */
114 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
115 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
dc1f8bf6
SH
116};
117typedef enum netdev_tx netdev_tx_t;
118
9a1654ba
JP
119/*
120 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
121 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
122 */
123static inline bool dev_xmit_complete(int rc)
124{
125 /*
126 * Positive cases with an skb consumed by a driver:
127 * - successful transmission (rc == NETDEV_TX_OK)
128 * - error while transmitting (rc < 0)
129 * - error while queueing to a different device (rc & NET_XMIT_MASK)
130 */
131 if (likely(rc < NET_XMIT_MASK))
132 return true;
133
134 return false;
135}
136
1da177e4
LT
137#endif
138
139#define MAX_ADDR_LEN 32 /* Largest hardware address length */
140
23b41168
VD
141/* Initial net device group. All devices belong to group 0 by default. */
142#define INIT_NETDEV_GROUP 0
143
c88e6f51 144#ifdef __KERNEL__
1da177e4
LT
145/*
146 * Compute the worst case header length according to the protocols
147 * used.
148 */
fe2918b0 149
caf66e58 150#if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
8388e3da
DM
151# if defined(CONFIG_MAC80211_MESH)
152# define LL_MAX_HEADER 128
153# else
154# define LL_MAX_HEADER 96
155# endif
c759a6b4 156#elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
8388e3da 157# define LL_MAX_HEADER 48
1da177e4 158#else
8388e3da 159# define LL_MAX_HEADER 32
1da177e4
LT
160#endif
161
e81c7359
DM
162#if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
163 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
164 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
165 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
1da177e4
LT
166#define MAX_HEADER LL_MAX_HEADER
167#else
168#define MAX_HEADER (LL_MAX_HEADER + 48)
169#endif
170
171/*
be1f3c2c
BH
172 * Old network device statistics. Fields are native words
173 * (unsigned long) so they can be read and written atomically.
1da177e4 174 */
fe2918b0 175
d94d9fee 176struct net_device_stats {
3cfde79c
BH
177 unsigned long rx_packets;
178 unsigned long tx_packets;
179 unsigned long rx_bytes;
180 unsigned long tx_bytes;
181 unsigned long rx_errors;
182 unsigned long tx_errors;
183 unsigned long rx_dropped;
184 unsigned long tx_dropped;
185 unsigned long multicast;
1da177e4 186 unsigned long collisions;
1da177e4 187 unsigned long rx_length_errors;
3cfde79c
BH
188 unsigned long rx_over_errors;
189 unsigned long rx_crc_errors;
190 unsigned long rx_frame_errors;
191 unsigned long rx_fifo_errors;
192 unsigned long rx_missed_errors;
1da177e4
LT
193 unsigned long tx_aborted_errors;
194 unsigned long tx_carrier_errors;
195 unsigned long tx_fifo_errors;
196 unsigned long tx_heartbeat_errors;
197 unsigned long tx_window_errors;
1da177e4
LT
198 unsigned long rx_compressed;
199 unsigned long tx_compressed;
200};
201
be1f3c2c
BH
202#endif /* __KERNEL__ */
203
1da177e4
LT
204
205/* Media selection options. */
206enum {
207 IF_PORT_UNKNOWN = 0,
208 IF_PORT_10BASE2,
209 IF_PORT_10BASET,
210 IF_PORT_AUI,
211 IF_PORT_100BASET,
212 IF_PORT_100BASETX,
213 IF_PORT_100BASEFX
214};
215
216#ifdef __KERNEL__
217
218#include <linux/cache.h>
219#include <linux/skbuff.h>
220
221struct neighbour;
222struct neigh_parms;
223struct sk_buff;
224
f001fde5
JP
225struct netdev_hw_addr {
226 struct list_head list;
227 unsigned char addr[MAX_ADDR_LEN];
228 unsigned char type;
ccffad25
JP
229#define NETDEV_HW_ADDR_T_LAN 1
230#define NETDEV_HW_ADDR_T_SAN 2
231#define NETDEV_HW_ADDR_T_SLAVE 3
232#define NETDEV_HW_ADDR_T_UNICAST 4
22bedad3 233#define NETDEV_HW_ADDR_T_MULTICAST 5
ccffad25 234 bool synced;
22bedad3 235 bool global_use;
8f8f103d 236 int refcount;
f001fde5
JP
237 struct rcu_head rcu_head;
238};
239
31278e71
JP
240struct netdev_hw_addr_list {
241 struct list_head list;
242 int count;
243};
244
22bedad3
JP
245#define netdev_hw_addr_list_count(l) ((l)->count)
246#define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
247#define netdev_hw_addr_list_for_each(ha, l) \
248 list_for_each_entry(ha, &(l)->list, list)
32e7bfc4 249
22bedad3
JP
250#define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
251#define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
252#define netdev_for_each_uc_addr(ha, dev) \
253 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
6683ece3 254
22bedad3
JP
255#define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
256#define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
18e225f2 257#define netdev_for_each_mc_addr(ha, dev) \
22bedad3 258 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
6683ece3 259
d94d9fee 260struct hh_cache {
1da177e4
LT
261 struct hh_cache *hh_next; /* Next entry */
262 atomic_t hh_refcnt; /* number of users */
f0490980
ED
263/*
264 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
265 * cache line on SMP.
266 * They are mostly read, but hh_refcnt may be changed quite frequently,
267 * incurring cache line ping pongs.
268 */
269 __be16 hh_type ____cacheline_aligned_in_smp;
270 /* protocol identifier, f.e ETH_P_IP
1da177e4
LT
271 * NOTE: For VLANs, this will be the
272 * encapuslated type. --BLG
273 */
d5c42c0e 274 u16 hh_len; /* length of header */
1da177e4 275 int (*hh_output)(struct sk_buff *skb);
3644f0ce 276 seqlock_t hh_lock;
1da177e4
LT
277
278 /* cached hardware header; allow for machine alignment needs. */
279#define HH_DATA_MOD 16
280#define HH_DATA_OFF(__len) \
5ba0eac6 281 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
1da177e4
LT
282#define HH_DATA_ALIGN(__len) \
283 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
284 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
285};
286
34d101dd
ED
287static inline void hh_cache_put(struct hh_cache *hh)
288{
289 if (atomic_dec_and_test(&hh->hh_refcnt))
290 kfree(hh);
291}
292
1da177e4
LT
293/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
294 * Alternative is:
295 * dev->hard_header_len ? (dev->hard_header_len +
296 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
297 *
298 * We could use other alignment values, but we must maintain the
299 * relationship HH alignment <= LL alignment.
f5184d26
JB
300 *
301 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
302 * may need.
1da177e4
LT
303 */
304#define LL_RESERVED_SPACE(dev) \
f5184d26 305 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
1da177e4 306#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
f5184d26
JB
307 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
308#define LL_ALLOCATED_SPACE(dev) \
309 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
1da177e4 310
3b04ddde
SH
311struct header_ops {
312 int (*create) (struct sk_buff *skb, struct net_device *dev,
313 unsigned short type, const void *daddr,
314 const void *saddr, unsigned len);
315 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
316 int (*rebuild)(struct sk_buff *skb);
317#define HAVE_HEADER_CACHE
318 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
319 void (*cache_update)(struct hh_cache *hh,
320 const struct net_device *dev,
321 const unsigned char *haddr);
322};
323
1da177e4
LT
324/* These flag bits are private to the generic network queueing
325 * layer, they may not be explicitly referenced by any other
326 * code.
327 */
328
d94d9fee 329enum netdev_state_t {
1da177e4
LT
330 __LINK_STATE_START,
331 __LINK_STATE_PRESENT,
1da177e4 332 __LINK_STATE_NOCARRIER,
b00055aa
SR
333 __LINK_STATE_LINKWATCH_PENDING,
334 __LINK_STATE_DORMANT,
1da177e4
LT
335};
336
337
338/*
339 * This structure holds at boot time configured netdevice settings. They
fe2918b0 340 * are then used in the device probing.
1da177e4
LT
341 */
342struct netdev_boot_setup {
343 char name[IFNAMSIZ];
344 struct ifmap map;
345};
346#define NETDEV_BOOT_SETUP_MAX 8
347
20380731 348extern int __init netdev_boot_setup(char *str);
1da177e4 349
bea3348e
SH
350/*
351 * Structure for NAPI scheduling similar to tasklet but with weighting
352 */
353struct napi_struct {
354 /* The poll_list must only be managed by the entity which
355 * changes the state of the NAPI_STATE_SCHED bit. This means
356 * whoever atomically sets that bit can add this napi_struct
357 * to the per-cpu poll_list, and whoever clears that bit
358 * can remove from the list right before clearing the bit.
359 */
360 struct list_head poll_list;
361
362 unsigned long state;
363 int weight;
364 int (*poll)(struct napi_struct *, int);
365#ifdef CONFIG_NETPOLL
366 spinlock_t poll_lock;
367 int poll_owner;
bea3348e 368#endif
4ae5544f
HX
369
370 unsigned int gro_count;
371
5d38a079 372 struct net_device *dev;
d565b0a1
HX
373 struct list_head dev_list;
374 struct sk_buff *gro_list;
5d38a079 375 struct sk_buff *skb;
bea3348e
SH
376};
377
d94d9fee 378enum {
bea3348e 379 NAPI_STATE_SCHED, /* Poll is scheduled */
a0a46196 380 NAPI_STATE_DISABLE, /* Disable pending */
7b363e44 381 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
bea3348e
SH
382};
383
5b252f0c 384enum gro_result {
d1c76af9
HX
385 GRO_MERGED,
386 GRO_MERGED_FREE,
387 GRO_HELD,
388 GRO_NORMAL,
389 GRO_DROP,
390};
5b252f0c 391typedef enum gro_result gro_result_t;
d1c76af9 392
8a4eb573
JP
393/*
394 * enum rx_handler_result - Possible return values for rx_handlers.
395 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
396 * further.
397 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
398 * case skb->dev was changed by rx_handler.
399 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
400 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
401 *
402 * rx_handlers are functions called from inside __netif_receive_skb(), to do
403 * special processing of the skb, prior to delivery to protocol handlers.
404 *
405 * Currently, a net_device can only have a single rx_handler registered. Trying
406 * to register a second rx_handler will return -EBUSY.
407 *
408 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
409 * To unregister a rx_handler on a net_device, use
410 * netdev_rx_handler_unregister().
411 *
412 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
413 * do with the skb.
414 *
415 * If the rx_handler consumed to skb in some way, it should return
416 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
417 * the skb to be delivered in some other ways.
418 *
419 * If the rx_handler changed skb->dev, to divert the skb to another
420 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
421 * new device will be called if it exists.
422 *
423 * If the rx_handler consider the skb should be ignored, it should return
424 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
425 * are registred on exact device (ptype->dev == skb->dev).
426 *
427 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
428 * delivered, it should return RX_HANDLER_PASS.
429 *
430 * A device without a registered rx_handler will behave as if rx_handler
431 * returned RX_HANDLER_PASS.
432 */
433
434enum rx_handler_result {
435 RX_HANDLER_CONSUMED,
436 RX_HANDLER_ANOTHER,
437 RX_HANDLER_EXACT,
438 RX_HANDLER_PASS,
439};
440typedef enum rx_handler_result rx_handler_result_t;
441typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
ab95bfe0 442
b3c97528 443extern void __napi_schedule(struct napi_struct *n);
bea3348e 444
a0a46196
DM
445static inline int napi_disable_pending(struct napi_struct *n)
446{
447 return test_bit(NAPI_STATE_DISABLE, &n->state);
448}
449
bea3348e
SH
450/**
451 * napi_schedule_prep - check if napi can be scheduled
452 * @n: napi context
453 *
454 * Test if NAPI routine is already running, and if not mark
455 * it as running. This is used as a condition variable
a0a46196
DM
456 * insure only one NAPI poll instance runs. We also make
457 * sure there is no pending NAPI disable.
bea3348e
SH
458 */
459static inline int napi_schedule_prep(struct napi_struct *n)
460{
a0a46196
DM
461 return !napi_disable_pending(n) &&
462 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
bea3348e
SH
463}
464
465/**
466 * napi_schedule - schedule NAPI poll
467 * @n: napi context
468 *
469 * Schedule NAPI poll routine to be called if it is not already
470 * running.
471 */
472static inline void napi_schedule(struct napi_struct *n)
473{
474 if (napi_schedule_prep(n))
475 __napi_schedule(n);
476}
477
bfe13f54
RD
478/* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
479static inline int napi_reschedule(struct napi_struct *napi)
480{
481 if (napi_schedule_prep(napi)) {
482 __napi_schedule(napi);
483 return 1;
484 }
485 return 0;
486}
487
bea3348e
SH
488/**
489 * napi_complete - NAPI processing complete
490 * @n: napi context
491 *
492 * Mark NAPI processing as complete.
493 */
d565b0a1
HX
494extern void __napi_complete(struct napi_struct *n);
495extern void napi_complete(struct napi_struct *n);
bea3348e
SH
496
497/**
498 * napi_disable - prevent NAPI from scheduling
499 * @n: napi context
500 *
501 * Stop NAPI from being scheduled on this context.
502 * Waits till any outstanding processing completes.
503 */
504static inline void napi_disable(struct napi_struct *n)
505{
a0a46196 506 set_bit(NAPI_STATE_DISABLE, &n->state);
bea3348e 507 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
43cc7380 508 msleep(1);
a0a46196 509 clear_bit(NAPI_STATE_DISABLE, &n->state);
bea3348e
SH
510}
511
512/**
513 * napi_enable - enable NAPI scheduling
514 * @n: napi context
515 *
516 * Resume NAPI from being scheduled on this context.
517 * Must be paired with napi_disable.
518 */
519static inline void napi_enable(struct napi_struct *n)
520{
521 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
522 smp_mb__before_clear_bit();
523 clear_bit(NAPI_STATE_SCHED, &n->state);
524}
525
c264c3de
SH
526#ifdef CONFIG_SMP
527/**
528 * napi_synchronize - wait until NAPI is not running
529 * @n: napi context
530 *
531 * Wait until NAPI is done being scheduled on this context.
532 * Waits till any outstanding processing completes but
533 * does not disable future activations.
534 */
535static inline void napi_synchronize(const struct napi_struct *n)
536{
537 while (test_bit(NAPI_STATE_SCHED, &n->state))
538 msleep(1);
539}
540#else
541# define napi_synchronize(n) barrier()
542#endif
543
d94d9fee 544enum netdev_queue_state_t {
79d16385 545 __QUEUE_STATE_XOFF,
c3f26a26 546 __QUEUE_STATE_FROZEN,
5a0d2268
ED
547#define QUEUE_STATE_XOFF_OR_FROZEN ((1 << __QUEUE_STATE_XOFF) | \
548 (1 << __QUEUE_STATE_FROZEN))
79d16385
DM
549};
550
bb949fbd 551struct netdev_queue {
6a321cb3
ED
552/*
553 * read mostly part
554 */
bb949fbd 555 struct net_device *dev;
b0e1e646 556 struct Qdisc *qdisc;
79d16385 557 unsigned long state;
b0e1e646 558 struct Qdisc *qdisc_sleeping;
1d24eb48
TH
559#ifdef CONFIG_RPS
560 struct kobject kobj;
561#endif
f2cd2d3e
ED
562#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
563 int numa_node;
564#endif
6a321cb3
ED
565/*
566 * write mostly part
567 */
568 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
569 int xmit_lock_owner;
9d21493b
ED
570 /*
571 * please use this field instead of dev->trans_start
572 */
573 unsigned long trans_start;
e8a0464c 574} ____cacheline_aligned_in_smp;
bb949fbd 575
f2cd2d3e
ED
576static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
577{
578#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
579 return q->numa_node;
580#else
b236da69 581 return NUMA_NO_NODE;
f2cd2d3e
ED
582#endif
583}
584
585static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
586{
587#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
588 q->numa_node = node;
589#endif
590}
591
df334545 592#ifdef CONFIG_RPS
0a9627f2
TH
593/*
594 * This structure holds an RPS map which can be of variable length. The
595 * map is an array of CPUs.
596 */
597struct rps_map {
598 unsigned int len;
599 struct rcu_head rcu;
600 u16 cpus[0];
601};
602#define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
603
fec5e652 604/*
c445477d
BH
605 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
606 * tail pointer for that CPU's input queue at the time of last enqueue, and
607 * a hardware filter index.
fec5e652
TH
608 */
609struct rps_dev_flow {
610 u16 cpu;
c445477d 611 u16 filter;
fec5e652
TH
612 unsigned int last_qtail;
613};
c445477d 614#define RPS_NO_FILTER 0xffff
fec5e652
TH
615
616/*
617 * The rps_dev_flow_table structure contains a table of flow mappings.
618 */
619struct rps_dev_flow_table {
620 unsigned int mask;
621 struct rcu_head rcu;
622 struct work_struct free_work;
623 struct rps_dev_flow flows[0];
624};
625#define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
626 (_num * sizeof(struct rps_dev_flow)))
627
628/*
629 * The rps_sock_flow_table contains mappings of flows to the last CPU
630 * on which they were processed by the application (set in recvmsg).
631 */
632struct rps_sock_flow_table {
633 unsigned int mask;
634 u16 ents[0];
635};
636#define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
637 (_num * sizeof(u16)))
638
639#define RPS_NO_CPU 0xffff
640
641static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
642 u32 hash)
643{
644 if (table && hash) {
645 unsigned int cpu, index = hash & table->mask;
646
647 /* We only give a hint, preemption can change cpu under us */
648 cpu = raw_smp_processor_id();
649
650 if (table->ents[index] != cpu)
651 table->ents[index] = cpu;
652 }
653}
654
655static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
656 u32 hash)
657{
658 if (table && hash)
659 table->ents[hash & table->mask] = RPS_NO_CPU;
660}
661
6e3f7faf 662extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
fec5e652 663
c445477d
BH
664#ifdef CONFIG_RFS_ACCEL
665extern bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index,
666 u32 flow_id, u16 filter_id);
667#endif
668
0a9627f2
TH
669/* This structure contains an instance of an RX queue. */
670struct netdev_rx_queue {
6e3f7faf
ED
671 struct rps_map __rcu *rps_map;
672 struct rps_dev_flow_table __rcu *rps_flow_table;
673 struct kobject kobj;
fe822240 674 struct net_device *dev;
0a9627f2 675} ____cacheline_aligned_in_smp;
fec5e652 676#endif /* CONFIG_RPS */
d314774c 677
bf264145
TH
678#ifdef CONFIG_XPS
679/*
680 * This structure holds an XPS map which can be of variable length. The
681 * map is an array of queues.
682 */
683struct xps_map {
684 unsigned int len;
685 unsigned int alloc_len;
686 struct rcu_head rcu;
687 u16 queues[0];
688};
689#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + (_num * sizeof(u16)))
690#define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
691 / sizeof(u16))
692
693/*
694 * This structure holds all XPS maps for device. Maps are indexed by CPU.
695 */
696struct xps_dev_maps {
697 struct rcu_head rcu;
a4177869 698 struct xps_map __rcu *cpu_map[0];
bf264145
TH
699};
700#define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
701 (nr_cpu_ids * sizeof(struct xps_map *)))
702#endif /* CONFIG_XPS */
703
4f57c087
JF
704#define TC_MAX_QUEUE 16
705#define TC_BITMASK 15
706/* HW offloaded queuing disciplines txq count and offset maps */
707struct netdev_tc_txq {
708 u16 count;
709 u16 offset;
710};
711
d314774c
SH
712/*
713 * This structure defines the management hooks for network devices.
00829823
SH
714 * The following hooks can be defined; unless noted otherwise, they are
715 * optional and can be filled with a null pointer.
d314774c
SH
716 *
717 * int (*ndo_init)(struct net_device *dev);
718 * This function is called once when network device is registered.
719 * The network device can use this to any late stage initializaton
720 * or semantic validattion. It can fail with an error code which will
721 * be propogated back to register_netdev
722 *
723 * void (*ndo_uninit)(struct net_device *dev);
724 * This function is called when device is unregistered or when registration
725 * fails. It is not called if init fails.
726 *
727 * int (*ndo_open)(struct net_device *dev);
728 * This function is called when network device transistions to the up
729 * state.
730 *
731 * int (*ndo_stop)(struct net_device *dev);
732 * This function is called when network device transistions to the down
733 * state.
734 *
dc1f8bf6
SH
735 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
736 * struct net_device *dev);
00829823 737 * Called when a packet needs to be transmitted.
dc1f8bf6
SH
738 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
739 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
00829823
SH
740 * Required can not be NULL.
741 *
742 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
743 * Called to decide which queue to when device supports multiple
744 * transmit queues.
745 *
d314774c
SH
746 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
747 * This function is called to allow device receiver to make
748 * changes to configuration when multicast or promiscious is enabled.
749 *
750 * void (*ndo_set_rx_mode)(struct net_device *dev);
751 * This function is called device changes address list filtering.
752 *
753 * void (*ndo_set_multicast_list)(struct net_device *dev);
754 * This function is called when the multicast address list changes.
755 *
756 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
757 * This function is called when the Media Access Control address
37b607c5 758 * needs to be changed. If this interface is not defined, the
d314774c
SH
759 * mac address can not be changed.
760 *
761 * int (*ndo_validate_addr)(struct net_device *dev);
762 * Test if Media Access Control address is valid for the device.
763 *
764 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
765 * Called when a user request an ioctl which can't be handled by
766 * the generic interface code. If not defined ioctl's return
767 * not supported error code.
768 *
769 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
770 * Used to set network devices bus interface parameters. This interface
771 * is retained for legacy reason, new devices should use the bus
772 * interface (PCI) for low level management.
773 *
774 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
775 * Called when a user wants to change the Maximum Transfer Unit
776 * of a device. If not defined, any request to change MTU will
777 * will return an error.
778 *
00829823 779 * void (*ndo_tx_timeout)(struct net_device *dev);
d314774c
SH
780 * Callback uses when the transmitter has not made any progress
781 * for dev->watchdog ticks.
782 *
3cfde79c 783 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
28172739 784 * struct rtnl_link_stats64 *storage);
d308e38f 785 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
d314774c 786 * Called when a user wants to get the network device usage
be1f3c2c 787 * statistics. Drivers must do one of the following:
3cfde79c
BH
788 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
789 * rtnl_link_stats64 structure passed by the caller.
82695d9b 790 * 2. Define @ndo_get_stats to update a net_device_stats structure
be1f3c2c
BH
791 * (which should normally be dev->stats) and return a pointer to
792 * it. The structure may be changed asynchronously only if each
793 * field is written atomically.
794 * 3. Update dev->stats asynchronously and atomically, and define
795 * neither operation.
d314774c
SH
796 *
797 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
68763c89 798 * If device support VLAN receive acceleration
d314774c
SH
799 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
800 * when vlan groups for the device changes. Note: grp is NULL
801 * if no vlan's groups are being used.
802 *
803 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
804 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
805 * this function is called when a VLAN id is registered.
806 *
807 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
808 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
809 * this function is called when a VLAN id is unregistered.
810 *
811 * void (*ndo_poll_controller)(struct net_device *dev);
95c26df8
WM
812 *
813 * SR-IOV management functions.
814 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
815 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
816 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
817 * int (*ndo_get_vf_config)(struct net_device *dev,
818 * int vf, struct ifla_vf_info *ivf);
57b61080
SF
819 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
820 * struct nlattr *port[]);
821 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
4f57c087
JF
822 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
823 * Called to setup 'tc' number of traffic classes in the net device. This
824 * is always called from the stack with the rtnl lock held and netif tx
825 * queues stopped. This allows the netdevice to perform queue management
826 * safely.
c445477d 827 *
e9bce845
YZ
828 * Fiber Channel over Ethernet (FCoE) offload functions.
829 * int (*ndo_fcoe_enable)(struct net_device *dev);
830 * Called when the FCoE protocol stack wants to start using LLD for FCoE
831 * so the underlying device can perform whatever needed configuration or
832 * initialization to support acceleration of FCoE traffic.
833 *
834 * int (*ndo_fcoe_disable)(struct net_device *dev);
835 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
836 * so the underlying device can perform whatever needed clean-ups to
837 * stop supporting acceleration of FCoE traffic.
838 *
839 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
840 * struct scatterlist *sgl, unsigned int sgc);
841 * Called when the FCoE Initiator wants to initialize an I/O that
842 * is a possible candidate for Direct Data Placement (DDP). The LLD can
843 * perform necessary setup and returns 1 to indicate the device is set up
844 * successfully to perform DDP on this I/O, otherwise this returns 0.
845 *
846 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
847 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
848 * indicated by the FC exchange id 'xid', so the underlying device can
849 * clean up and reuse resources for later DDP requests.
850 *
851 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
852 * struct scatterlist *sgl, unsigned int sgc);
853 * Called when the FCoE Target wants to initialize an I/O that
854 * is a possible candidate for Direct Data Placement (DDP). The LLD can
855 * perform necessary setup and returns 1 to indicate the device is set up
856 * successfully to perform DDP on this I/O, otherwise this returns 0.
857 *
858 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
859 * Called when the underlying device wants to override default World Wide
860 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
861 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
862 * protocol stack to use.
863 *
c445477d
BH
864 * RFS acceleration.
865 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
866 * u16 rxq_index, u32 flow_id);
867 * Set hardware filter for RFS. rxq_index is the target queue index;
868 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
869 * Return the filter ID on success, or a negative error code.
fbaec0ea
JP
870 *
871 * Slave management functions (for bridge, bonding, etc). User should
872 * call netdev_set_master() to set dev->master properly.
873 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
874 * Called to make another netdev an underling.
875 *
876 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
877 * Called to release previously enslaved netdev.
5455c699
MM
878 *
879 * Feature/offload setting functions.
880 * u32 (*ndo_fix_features)(struct net_device *dev, u32 features);
881 * Adjusts the requested feature flags according to device-specific
882 * constraints, and returns the resulting flags. Must not modify
883 * the device state.
884 *
885 * int (*ndo_set_features)(struct net_device *dev, u32 features);
886 * Called to update device configuration to new features. Passed
887 * feature set might be less than what was returned by ndo_fix_features()).
888 * Must return >0 or -errno if it changed dev->features itself.
889 *
d314774c 890 */
47fd5b83 891#define HAVE_NET_DEVICE_OPS
d314774c
SH
892struct net_device_ops {
893 int (*ndo_init)(struct net_device *dev);
894 void (*ndo_uninit)(struct net_device *dev);
895 int (*ndo_open)(struct net_device *dev);
896 int (*ndo_stop)(struct net_device *dev);
dc1f8bf6 897 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
00829823
SH
898 struct net_device *dev);
899 u16 (*ndo_select_queue)(struct net_device *dev,
900 struct sk_buff *skb);
d314774c
SH
901 void (*ndo_change_rx_flags)(struct net_device *dev,
902 int flags);
d314774c 903 void (*ndo_set_rx_mode)(struct net_device *dev);
d314774c 904 void (*ndo_set_multicast_list)(struct net_device *dev);
d314774c
SH
905 int (*ndo_set_mac_address)(struct net_device *dev,
906 void *addr);
d314774c 907 int (*ndo_validate_addr)(struct net_device *dev);
d314774c
SH
908 int (*ndo_do_ioctl)(struct net_device *dev,
909 struct ifreq *ifr, int cmd);
d314774c
SH
910 int (*ndo_set_config)(struct net_device *dev,
911 struct ifmap *map);
00829823
SH
912 int (*ndo_change_mtu)(struct net_device *dev,
913 int new_mtu);
914 int (*ndo_neigh_setup)(struct net_device *dev,
915 struct neigh_parms *);
d314774c
SH
916 void (*ndo_tx_timeout) (struct net_device *dev);
917
28172739
ED
918 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
919 struct rtnl_link_stats64 *storage);
d314774c
SH
920 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
921
922 void (*ndo_vlan_rx_register)(struct net_device *dev,
923 struct vlan_group *grp);
924 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
925 unsigned short vid);
926 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
927 unsigned short vid);
928#ifdef CONFIG_NET_POLL_CONTROLLER
d314774c 929 void (*ndo_poll_controller)(struct net_device *dev);
4247e161
HX
930 int (*ndo_netpoll_setup)(struct net_device *dev,
931 struct netpoll_info *info);
0e34e931 932 void (*ndo_netpoll_cleanup)(struct net_device *dev);
d314774c 933#endif
95c26df8
WM
934 int (*ndo_set_vf_mac)(struct net_device *dev,
935 int queue, u8 *mac);
936 int (*ndo_set_vf_vlan)(struct net_device *dev,
937 int queue, u16 vlan, u8 qos);
938 int (*ndo_set_vf_tx_rate)(struct net_device *dev,
939 int vf, int rate);
940 int (*ndo_get_vf_config)(struct net_device *dev,
941 int vf,
942 struct ifla_vf_info *ivf);
57b61080
SF
943 int (*ndo_set_vf_port)(struct net_device *dev,
944 int vf,
945 struct nlattr *port[]);
946 int (*ndo_get_vf_port)(struct net_device *dev,
947 int vf, struct sk_buff *skb);
4f57c087 948 int (*ndo_setup_tc)(struct net_device *dev, u8 tc);
4d288d57 949#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
cb454399
YZ
950 int (*ndo_fcoe_enable)(struct net_device *dev);
951 int (*ndo_fcoe_disable)(struct net_device *dev);
4d288d57
YZ
952 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
953 u16 xid,
954 struct scatterlist *sgl,
955 unsigned int sgc);
956 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
957 u16 xid);
6247e086
YZ
958 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
959 u16 xid,
960 struct scatterlist *sgl,
961 unsigned int sgc);
df5c7945
YZ
962#define NETDEV_FCOE_WWNN 0
963#define NETDEV_FCOE_WWPN 1
964 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
965 u64 *wwn, int type);
4d288d57 966#endif
c445477d
BH
967#ifdef CONFIG_RFS_ACCEL
968 int (*ndo_rx_flow_steer)(struct net_device *dev,
969 const struct sk_buff *skb,
970 u16 rxq_index,
971 u32 flow_id);
972#endif
fbaec0ea
JP
973 int (*ndo_add_slave)(struct net_device *dev,
974 struct net_device *slave_dev);
975 int (*ndo_del_slave)(struct net_device *dev,
976 struct net_device *slave_dev);
5455c699
MM
977 u32 (*ndo_fix_features)(struct net_device *dev,
978 u32 features);
979 int (*ndo_set_features)(struct net_device *dev,
980 u32 features);
d314774c
SH
981};
982
1da177e4
LT
983/*
984 * The DEVICE structure.
985 * Actually, this whole structure is a big mistake. It mixes I/O
986 * data with strictly "high-level" data, and it has to know about
987 * almost every data structure used in the INET module.
988 *
989 * FIXME: cleanup struct net_device such that network protocol info
990 * moves out.
991 */
992
d94d9fee 993struct net_device {
1da177e4
LT
994
995 /*
996 * This is the first field of the "visible" part of this structure
997 * (i.e. as seen by users in the "Space.c" file). It is the name
724df615 998 * of the interface.
1da177e4
LT
999 */
1000 char name[IFNAMSIZ];
ed77134b 1001
82f68251 1002 struct pm_qos_request_list pm_qos_req;
ed77134b 1003
9356b8fc
ED
1004 /* device name hash chain */
1005 struct hlist_node name_hlist;
0b815a1a
SH
1006 /* snmp alias */
1007 char *ifalias;
1da177e4
LT
1008
1009 /*
1010 * I/O specific fields
1011 * FIXME: Merge these and struct ifmap into one
1012 */
1013 unsigned long mem_end; /* shared mem end */
1014 unsigned long mem_start; /* shared mem start */
1015 unsigned long base_addr; /* device I/O address */
1016 unsigned int irq; /* device IRQ number */
1017
1018 /*
1019 * Some hardware also needs these fields, but they are not
1020 * part of the usual set specified in Space.c.
1021 */
1022
1023 unsigned char if_port; /* Selectable AUI, TP,..*/
1024 unsigned char dma; /* DMA channel */
1025
1026 unsigned long state;
1027
7562f876 1028 struct list_head dev_list;
bea3348e 1029 struct list_head napi_list;
44a0873d 1030 struct list_head unreg_list;
1da177e4 1031
5455c699 1032 /* currently active device features */
04ed3e74 1033 u32 features;
5455c699
MM
1034 /* user-changeable features */
1035 u32 hw_features;
1036 /* user-requested features */
1037 u32 wanted_features;
1aac6267 1038 /* mask of features inheritable by VLAN devices */
04ed3e74
MM
1039 u32 vlan_features;
1040
5455c699
MM
1041 /* Net device feature bits; if you change something,
1042 * also update netdev_features_strings[] in ethtool.c */
1043
9356b8fc 1044#define NETIF_F_SG 1 /* Scatter/gather IO. */
d212f87b 1045#define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
9356b8fc
ED
1046#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
1047#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
d212f87b 1048#define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
9356b8fc
ED
1049#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
1050#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
1051#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
1052#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
1053#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
1054#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
37c3185a 1055#define NETIF_F_GSO 2048 /* Enable software GSO. */
e24eb521
CB
1056#define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
1057 /* do not use LLTX in new drivers */
ce286d32 1058#define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
d565b0a1 1059#define NETIF_F_GRO 16384 /* Generic receive offload */
3ae7c0b2 1060#define NETIF_F_LRO 32768 /* large receive offload */
7967168c 1061
8dc92f7e 1062/* the GSO_MASK reserves bits 16 through 23 */
01d5b2fc 1063#define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
8dc92f7e 1064#define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
bb2af4f5 1065#define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
15682bc4 1066#define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
b00fabb4 1067#define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
e83d360d 1068#define NETIF_F_RXCSUM (1 << 29) /* Receive checksumming offload */
c6e1a0d1 1069#define NETIF_F_NOCACHE_COPY (1 << 30) /* Use no-cache copyfromuser */
01d5b2fc 1070
7967168c 1071 /* Segmentation offload features */
289c79a4 1072#define NETIF_F_GSO_SHIFT 16
43eb99c5 1073#define NETIF_F_GSO_MASK 0x00ff0000
7967168c 1074#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
f83ef8c0 1075#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
576a30eb 1076#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
f83ef8c0
HX
1077#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
1078#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
01d5b2fc 1079#define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
9356b8fc 1080
5455c699
MM
1081 /* Features valid for ethtool to change */
1082 /* = all defined minus driver/device-class-related */
1083#define NETIF_F_NEVER_CHANGE (NETIF_F_HIGHDMA | NETIF_F_VLAN_CHALLENGED | \
1084 NETIF_F_LLTX | NETIF_F_NETNS_LOCAL)
c6e1a0d1 1085#define NETIF_F_ETHTOOL_BITS (0x7f3fffff & ~NETIF_F_NEVER_CHANGE)
5455c699 1086
78eb8877 1087 /* List of features with software fallbacks. */
d29c0c5c
HX
1088#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
1089 NETIF_F_TSO6 | NETIF_F_UFO)
78eb8877 1090
d212f87b 1091
8648b305 1092#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
d212f87b
SH
1093#define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
1094#define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
1095#define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
8648b305 1096
0a417704
MM
1097#define NETIF_F_ALL_TSO (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
1098
1099#define NETIF_F_ALL_TX_OFFLOADS (NETIF_F_ALL_CSUM | NETIF_F_SG | \
1100 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1101 NETIF_F_SCTP_CSUM | NETIF_F_FCOE_CRC)
1102
b63365a2
HX
1103 /*
1104 * If one device supports one of these features, then enable them
1105 * for all in netdev_increment_features.
1106 */
1107#define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
d314774c 1108 NETIF_F_SG | NETIF_F_HIGHDMA | \
1742f183
MM
1109 NETIF_F_FRAGLIST | NETIF_F_VLAN_CHALLENGED)
1110 /*
1111 * If one device doesn't support one of these features, then disable it
1112 * for all in netdev_increment_features.
1113 */
1114#define NETIF_F_ALL_FOR_ALL (NETIF_F_NOCACHE_COPY | NETIF_F_FSO)
b63365a2 1115
212b573f
MM
1116 /* changeable features with no special hardware requirements */
1117#define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO)
1118
1da177e4
LT
1119 /* Interface index. Unique device identifier */
1120 int ifindex;
1121 int iflink;
1122
c45d286e 1123 struct net_device_stats stats;
caf586e5
ED
1124 atomic_long_t rx_dropped; /* dropped packets by core network
1125 * Do not use this in drivers.
1126 */
1da177e4 1127
b86e0280 1128#ifdef CONFIG_WIRELESS_EXT
1da177e4
LT
1129 /* List of functions to handle Wireless Extensions (instead of ioctl).
1130 * See <net/iw_handler.h> for details. Jean II */
1131 const struct iw_handler_def * wireless_handlers;
1132 /* Instance data managed by the core of Wireless Extensions. */
1133 struct iw_public_data * wireless_data;
b86e0280 1134#endif
d314774c
SH
1135 /* Management operations */
1136 const struct net_device_ops *netdev_ops;
76fd8593 1137 const struct ethtool_ops *ethtool_ops;
1da177e4 1138
3b04ddde
SH
1139 /* Hardware header description */
1140 const struct header_ops *header_ops;
1141
b00055aa 1142 unsigned int flags; /* interface flags (a la BSD) */
1da177e4 1143 unsigned short gflags;
1726442e 1144 unsigned int priv_flags; /* Like 'flags' but invisible to userspace. */
1da177e4
LT
1145 unsigned short padded; /* How much padding added by alloc_netdev() */
1146
b00055aa
SR
1147 unsigned char operstate; /* RFC2863 operstate */
1148 unsigned char link_mode; /* mapping policy to operstate */
1149
cd7b5396 1150 unsigned int mtu; /* interface MTU value */
1da177e4
LT
1151 unsigned short type; /* interface hardware type */
1152 unsigned short hard_header_len; /* hardware hdr length */
1da177e4 1153
f5184d26
JB
1154 /* extra head- and tailroom the hardware may need, but not in all cases
1155 * can this be guaranteed, especially tailroom. Some cases also use
1156 * LL_MAX_HEADER instead to allocate the skb.
1157 */
1158 unsigned short needed_headroom;
1159 unsigned short needed_tailroom;
1160
1da177e4 1161 /* Interface address info. */
a6f9a705 1162 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
c1f79426 1163 unsigned char addr_assign_type; /* hw address assignment type */
1da177e4
LT
1164 unsigned char addr_len; /* hardware address length */
1165 unsigned short dev_id; /* for shared network cards */
1166
ccffad25 1167 spinlock_t addr_list_lock;
22bedad3
JP
1168 struct netdev_hw_addr_list uc; /* Unicast mac addresses */
1169 struct netdev_hw_addr_list mc; /* Multicast mac addresses */
1170 int uc_promisc;
9d45abe1
WC
1171 unsigned int promiscuity;
1172 unsigned int allmulti;
1da177e4 1173
1da177e4
LT
1174
1175 /* Protocol specific pointers */
65ac6a5f
JG
1176
1177#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
b616b09a 1178 struct vlan_group __rcu *vlgrp; /* VLAN group */
65ac6a5f 1179#endif
91da11f8
LB
1180#ifdef CONFIG_NET_DSA
1181 void *dsa_ptr; /* dsa specific data */
1182#endif
1da177e4 1183 void *atalk_ptr; /* AppleTalk link */
95ae6b22 1184 struct in_device __rcu *ip_ptr; /* IPv4 specific data */
fc766e4c 1185 struct dn_dev __rcu *dn_ptr; /* DECnet specific data */
198caeca 1186 struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */
1da177e4
LT
1187 void *ec_ptr; /* Econet specific data */
1188 void *ax25_ptr; /* AX.25 specific data */
704232c2
JB
1189 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
1190 assign before registering */
1da177e4 1191
9356b8fc 1192/*
cd13539b 1193 * Cache lines mostly used on receive path (including eth_type_trans())
9356b8fc 1194 */
4dc89133
ED
1195 unsigned long last_rx; /* Time of last Rx
1196 * This should not be set in
1197 * drivers, unless really needed,
1198 * because network stack (bonding)
1199 * use it if/when necessary, to
1200 * avoid dirtying this cache line.
1201 */
1202
cd13539b
ED
1203 struct net_device *master; /* Pointer to master device of a group,
1204 * which this device is member of.
1205 */
1206
9356b8fc 1207 /* Interface address info used in eth_type_trans() */
f001fde5
JP
1208 unsigned char *dev_addr; /* hw address, (before bcast
1209 because most packets are
1210 unicast) */
1211
31278e71
JP
1212 struct netdev_hw_addr_list dev_addrs; /* list of device
1213 hw addresses */
9356b8fc
ED
1214
1215 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1da177e4 1216
df334545 1217#ifdef CONFIG_RPS
0a9627f2
TH
1218 struct kset *queues_kset;
1219
1220 struct netdev_rx_queue *_rx;
1221
62fe0b40 1222 /* Number of RX queues allocated at register_netdev() time */
0a9627f2 1223 unsigned int num_rx_queues;
62fe0b40
BH
1224
1225 /* Number of RX queues currently active in device */
1226 unsigned int real_num_rx_queues;
c445477d
BH
1227
1228#ifdef CONFIG_RFS_ACCEL
1229 /* CPU reverse-mapping for RX completion interrupts, indexed
1230 * by RX queue number. Assigned by driver. This must only be
1231 * set if the ndo_rx_flow_steer operation is defined. */
1232 struct cpu_rmap *rx_cpu_rmap;
1233#endif
df334545 1234#endif
0a9627f2 1235
61391cde 1236 rx_handler_func_t __rcu *rx_handler;
1237 void __rcu *rx_handler_data;
e8a0464c 1238
24824a09 1239 struct netdev_queue __rcu *ingress_queue;
cd13539b
ED
1240
1241/*
1242 * Cache lines mostly used on transmit path
1243 */
e8a0464c 1244 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
fd2ea0a7
DM
1245
1246 /* Number of TX queues allocated at alloc_netdev_mq() time */
e8a0464c 1247 unsigned int num_tx_queues;
fd2ea0a7
DM
1248
1249 /* Number of TX queues currently active in device */
1250 unsigned int real_num_tx_queues;
1251
af356afa
PM
1252 /* root qdisc from userspace point of view */
1253 struct Qdisc *qdisc;
1254
1da177e4 1255 unsigned long tx_queue_len; /* Max frames per queue allowed */
c3f26a26 1256 spinlock_t tx_global_lock;
cd13539b 1257
bf264145 1258#ifdef CONFIG_XPS
a4177869 1259 struct xps_dev_maps __rcu *xps_maps;
bf264145 1260#endif
1d24eb48 1261
9356b8fc 1262 /* These may be needed for future network-power-down code. */
9d21493b
ED
1263
1264 /*
1265 * trans_start here is expensive for high speed devices on SMP,
1266 * please use netdev_queue->trans_start instead.
1267 */
9356b8fc
ED
1268 unsigned long trans_start; /* Time (in jiffies) of last Tx */
1269
1270 int watchdog_timeo; /* used by dev_watchdog() */
1271 struct timer_list watchdog_timer;
1272
1da177e4 1273 /* Number of references to this device */
29b4433d 1274 int __percpu *pcpu_refcnt;
9356b8fc 1275
1da177e4
LT
1276 /* delayed register/unregister */
1277 struct list_head todo_list;
1da177e4
LT
1278 /* device index hash chain */
1279 struct hlist_node index_hlist;
1280
e014debe 1281 struct list_head link_watch_list;
572a103d 1282
1da177e4
LT
1283 /* register/unregister state machine */
1284 enum { NETREG_UNINITIALIZED=0,
b17a7c17 1285 NETREG_REGISTERED, /* completed register_netdevice */
1da177e4
LT
1286 NETREG_UNREGISTERING, /* called unregister_netdevice */
1287 NETREG_UNREGISTERED, /* completed unregister todo */
1288 NETREG_RELEASED, /* called free_netdev */
937f1ba5 1289 NETREG_DUMMY, /* dummy device for NAPI poll */
a2835763
PM
1290 } reg_state:16;
1291
1292 enum {
1293 RTNL_LINK_INITIALIZED,
1294 RTNL_LINK_INITIALIZING,
1295 } rtnl_link_state:16;
1da177e4 1296
d314774c
SH
1297 /* Called from unregister, can be used to call free_netdev */
1298 void (*destructor)(struct net_device *dev);
1da177e4 1299
1da177e4 1300#ifdef CONFIG_NETPOLL
115c1d6e 1301 struct netpoll_info *npinfo;
1da177e4 1302#endif
eae792b7 1303
c346dca1 1304#ifdef CONFIG_NET_NS
4a1c5371
EB
1305 /* Network namespace this network device is inside */
1306 struct net *nd_net;
c346dca1 1307#endif
4a1c5371 1308
4951704b 1309 /* mid-layer private */
a7855c78
ED
1310 union {
1311 void *ml_priv;
1312 struct pcpu_lstats __percpu *lstats; /* loopback stats */
290b895e 1313 struct pcpu_tstats __percpu *tstats; /* tunnel stats */
6d81f41c 1314 struct pcpu_dstats __percpu *dstats; /* dummy stats */
a7855c78 1315 };
eca9ebac 1316 /* GARP */
3cc77ec7 1317 struct garp_port __rcu *garp_port;
1da177e4 1318
1da177e4 1319 /* class/net/name entry */
43cb76d9 1320 struct device dev;
0c509a6c
EB
1321 /* space for optional device, statistics, and wireless sysfs groups */
1322 const struct attribute_group *sysfs_groups[4];
38f7b870
PM
1323
1324 /* rtnetlink link ops */
1325 const struct rtnl_link_ops *rtnl_link_ops;
f25f4e44 1326
82cc1a7a
PWJ
1327 /* for setting kernel sock attribute on TCP connection setup */
1328#define GSO_MAX_SIZE 65536
1329 unsigned int gso_max_size;
d314774c 1330
7a6b6f51 1331#ifdef CONFIG_DCB
2f90b865 1332 /* Data Center Bridging netlink ops */
32953543 1333 const struct dcbnl_rtnl_ops *dcbnl_ops;
2f90b865 1334#endif
4f57c087
JF
1335 u8 num_tc;
1336 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
1337 u8 prio_tc_map[TC_BITMASK + 1];
2f90b865 1338
4d288d57
YZ
1339#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
1340 /* max exchange id for FCoE LRO by ddp */
1341 unsigned int fcoe_ddp_xid;
1342#endif
15682bc4
PWJ
1343 /* n-tuple filter list attached to this device */
1344 struct ethtool_rx_ntuple_list ethtool_ntuple_list;
c1f19b51
RC
1345
1346 /* phy device may attach itself for hardware timestamping */
1347 struct phy_device *phydev;
cbda10fa
VD
1348
1349 /* group the device belongs to */
1350 int group;
1da177e4 1351};
43cb76d9 1352#define to_net_dev(d) container_of(d, struct net_device, dev)
1da177e4
LT
1353
1354#define NETDEV_ALIGN 32
1da177e4 1355
4f57c087
JF
1356static inline
1357int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
1358{
1359 return dev->prio_tc_map[prio & TC_BITMASK];
1360}
1361
1362static inline
1363int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
1364{
1365 if (tc >= dev->num_tc)
1366 return -EINVAL;
1367
1368 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
1369 return 0;
1370}
1371
1372static inline
1373void netdev_reset_tc(struct net_device *dev)
1374{
1375 dev->num_tc = 0;
1376 memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
1377 memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
1378}
1379
1380static inline
1381int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
1382{
1383 if (tc >= dev->num_tc)
1384 return -EINVAL;
1385
1386 dev->tc_to_txq[tc].count = count;
1387 dev->tc_to_txq[tc].offset = offset;
1388 return 0;
1389}
1390
1391static inline
1392int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
1393{
1394 if (num_tc > TC_MAX_QUEUE)
1395 return -EINVAL;
1396
1397 dev->num_tc = num_tc;
1398 return 0;
1399}
1400
1401static inline
1402int netdev_get_num_tc(struct net_device *dev)
1403{
1404 return dev->num_tc;
1405}
1406
e8a0464c
DM
1407static inline
1408struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1409 unsigned int index)
1410{
1411 return &dev->_tx[index];
1412}
1413
1414static inline void netdev_for_each_tx_queue(struct net_device *dev,
1415 void (*f)(struct net_device *,
1416 struct netdev_queue *,
1417 void *),
1418 void *arg)
1419{
1420 unsigned int i;
1421
1422 for (i = 0; i < dev->num_tx_queues; i++)
1423 f(dev, &dev->_tx[i], arg);
1424}
1425
c346dca1
YH
1426/*
1427 * Net namespace inlines
1428 */
1429static inline
1430struct net *dev_net(const struct net_device *dev)
1431{
c2d9ba9b 1432 return read_pnet(&dev->nd_net);
c346dca1
YH
1433}
1434
1435static inline
f5aa23fd 1436void dev_net_set(struct net_device *dev, struct net *net)
c346dca1
YH
1437{
1438#ifdef CONFIG_NET_NS
f3005d7f
DL
1439 release_net(dev->nd_net);
1440 dev->nd_net = hold_net(net);
c346dca1
YH
1441#endif
1442}
1443
cf85d08f
LB
1444static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1445{
1446#ifdef CONFIG_NET_DSA_TAG_DSA
1447 if (dev->dsa_ptr != NULL)
1448 return dsa_uses_dsa_tags(dev->dsa_ptr);
1449#endif
1450
1451 return 0;
1452}
1453
8a83a00b
AB
1454#ifndef CONFIG_NET_NS
1455static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
1456{
1457 skb->dev = dev;
1458}
1459#else /* CONFIG_NET_NS */
1460void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
1461#endif
1462
396138f0
LB
1463static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1464{
1465#ifdef CONFIG_NET_DSA_TAG_TRAILER
1466 if (dev->dsa_ptr != NULL)
1467 return dsa_uses_trailer_tags(dev->dsa_ptr);
1468#endif
1469
1470 return 0;
1471}
1472
bea3348e
SH
1473/**
1474 * netdev_priv - access network device private data
1475 * @dev: network device
1476 *
1477 * Get network device private data
1478 */
6472ce60 1479static inline void *netdev_priv(const struct net_device *dev)
1da177e4 1480{
1ce8e7b5 1481 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1da177e4
LT
1482}
1483
1da177e4
LT
1484/* Set the sysfs physical device reference for the network logical device
1485 * if set prior to registration will cause a symlink during initialization.
1486 */
43cb76d9 1487#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1da177e4 1488
384912ed
MH
1489/* Set the sysfs device type for the network logical device to allow
1490 * fin grained indentification of different network device types. For
1491 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1492 */
1493#define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1494
3b582cc1
SH
1495/**
1496 * netif_napi_add - initialize a napi context
1497 * @dev: network device
1498 * @napi: napi context
1499 * @poll: polling function
1500 * @weight: default weight
1501 *
1502 * netif_napi_add() must be used to initialize a napi context prior to calling
1503 * *any* of the other napi related functions.
1504 */
d565b0a1
HX
1505void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1506 int (*poll)(struct napi_struct *, int), int weight);
bea3348e 1507
d8156534
AD
1508/**
1509 * netif_napi_del - remove a napi context
1510 * @napi: napi context
1511 *
1512 * netif_napi_del() removes a napi context from the network device napi list
1513 */
d565b0a1
HX
1514void netif_napi_del(struct napi_struct *napi);
1515
1516struct napi_gro_cb {
78a478d0
HX
1517 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1518 void *frag0;
1519
7489594c
HX
1520 /* Length of frag0. */
1521 unsigned int frag0_len;
1522
86911732
HX
1523 /* This indicates where we are processing relative to skb->data. */
1524 int data_offset;
1525
d565b0a1
HX
1526 /* This is non-zero if the packet may be of the same flow. */
1527 int same_flow;
1528
1529 /* This is non-zero if the packet cannot be merged with the new skb. */
1530 int flush;
1531
1532 /* Number of segments aggregated. */
1533 int count;
5d38a079
HX
1534
1535 /* Free the skb? */
1536 int free;
d565b0a1
HX
1537};
1538
1539#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
d8156534 1540
1da177e4 1541struct packet_type {
f2ccd8fa
DM
1542 __be16 type; /* This is really htons(ether_type). */
1543 struct net_device *dev; /* NULL is wildcarded here */
1544 int (*func) (struct sk_buff *,
1545 struct net_device *,
1546 struct packet_type *,
1547 struct net_device *);
576a30eb 1548 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
04ed3e74 1549 u32 features);
a430a43d 1550 int (*gso_send_check)(struct sk_buff *skb);
d565b0a1
HX
1551 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1552 struct sk_buff *skb);
1553 int (*gro_complete)(struct sk_buff *skb);
1da177e4
LT
1554 void *af_packet_priv;
1555 struct list_head list;
1556};
1557
1558#include <linux/interrupt.h>
1559#include <linux/notifier.h>
1560
1da177e4
LT
1561extern rwlock_t dev_base_lock; /* Device list lock */
1562
7562f876 1563
881d966b
EB
1564#define for_each_netdev(net, d) \
1565 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
dcbccbd4
EB
1566#define for_each_netdev_reverse(net, d) \
1567 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
c6d14c84
ED
1568#define for_each_netdev_rcu(net, d) \
1569 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
881d966b
EB
1570#define for_each_netdev_safe(net, d, n) \
1571 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1572#define for_each_netdev_continue(net, d) \
1573 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
254245d2 1574#define for_each_netdev_continue_rcu(net, d) \
1575 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
881d966b 1576#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
7562f876 1577
a050c33f
DL
1578static inline struct net_device *next_net_device(struct net_device *dev)
1579{
1580 struct list_head *lh;
1581 struct net *net;
1582
c346dca1 1583 net = dev_net(dev);
a050c33f
DL
1584 lh = dev->dev_list.next;
1585 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1586}
1587
ce81b76a
ED
1588static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1589{
1590 struct list_head *lh;
1591 struct net *net;
1592
1593 net = dev_net(dev);
ccf43438 1594 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
ce81b76a
ED
1595 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1596}
1597
a050c33f
DL
1598static inline struct net_device *first_net_device(struct net *net)
1599{
1600 return list_empty(&net->dev_base_head) ? NULL :
1601 net_device_entry(net->dev_base_head.next);
1602}
7562f876 1603
ccf43438
ED
1604static inline struct net_device *first_net_device_rcu(struct net *net)
1605{
1606 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
1607
1608 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1609}
1610
1da177e4
LT
1611extern int netdev_boot_setup_check(struct net_device *dev);
1612extern unsigned long netdev_boot_base(const char *prefix, int unit);
941666c2
ED
1613extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
1614 const char *hwaddr);
881d966b
EB
1615extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1616extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1da177e4
LT
1617extern void dev_add_pack(struct packet_type *pt);
1618extern void dev_remove_pack(struct packet_type *pt);
1619extern void __dev_remove_pack(struct packet_type *pt);
1620
bb69ae04
ED
1621extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
1622 unsigned short mask);
881d966b 1623extern struct net_device *dev_get_by_name(struct net *net, const char *name);
72c9528b 1624extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
881d966b 1625extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1da177e4
LT
1626extern int dev_alloc_name(struct net_device *dev, const char *name);
1627extern int dev_open(struct net_device *dev);
1628extern int dev_close(struct net_device *dev);
0187bdfb 1629extern void dev_disable_lro(struct net_device *dev);
1da177e4
LT
1630extern int dev_queue_xmit(struct sk_buff *skb);
1631extern int register_netdevice(struct net_device *dev);
44a0873d
ED
1632extern void unregister_netdevice_queue(struct net_device *dev,
1633 struct list_head *head);
9b5e383c 1634extern void unregister_netdevice_many(struct list_head *head);
44a0873d
ED
1635static inline void unregister_netdevice(struct net_device *dev)
1636{
1637 unregister_netdevice_queue(dev, NULL);
1638}
1639
29b4433d 1640extern int netdev_refcnt_read(const struct net_device *dev);
1da177e4
LT
1641extern void free_netdev(struct net_device *dev);
1642extern void synchronize_net(void);
1643extern int register_netdevice_notifier(struct notifier_block *nb);
1644extern int unregister_netdevice_notifier(struct notifier_block *nb);
937f1ba5 1645extern int init_dummy_netdev(struct net_device *dev);
9d40bbda 1646extern void netdev_resync_ops(struct net_device *dev);
937f1ba5 1647
ad7379d4 1648extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
881d966b
EB
1649extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1650extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
fb699dfd 1651extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1da177e4
LT
1652extern int dev_restart(struct net_device *dev);
1653#ifdef CONFIG_NETPOLL_TRAP
1654extern int netpoll_trap(void);
1655#endif
86911732
HX
1656extern int skb_gro_receive(struct sk_buff **head,
1657 struct sk_buff *skb);
78a478d0 1658extern void skb_gro_reset_offset(struct sk_buff *skb);
86911732
HX
1659
1660static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1661{
1662 return NAPI_GRO_CB(skb)->data_offset;
1663}
1664
1665static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1666{
1667 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1668}
1669
1670static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1671{
1672 NAPI_GRO_CB(skb)->data_offset += len;
1673}
1674
a5b1cf28
HX
1675static inline void *skb_gro_header_fast(struct sk_buff *skb,
1676 unsigned int offset)
86911732 1677{
a5b1cf28
HX
1678 return NAPI_GRO_CB(skb)->frag0 + offset;
1679}
78a478d0 1680
a5b1cf28
HX
1681static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1682{
1683 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1684}
78a478d0 1685
a5b1cf28
HX
1686static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1687 unsigned int offset)
1688{
1689 NAPI_GRO_CB(skb)->frag0 = NULL;
1690 NAPI_GRO_CB(skb)->frag0_len = 0;
1691 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
86911732 1692}
1da177e4 1693
aa4b9f53
HX
1694static inline void *skb_gro_mac_header(struct sk_buff *skb)
1695{
78d3fd0b 1696 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
aa4b9f53
HX
1697}
1698
36e7b1b8
HX
1699static inline void *skb_gro_network_header(struct sk_buff *skb)
1700{
78d3fd0b
HX
1701 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1702 skb_network_offset(skb);
36e7b1b8
HX
1703}
1704
0c4e8581
SH
1705static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1706 unsigned short type,
3b04ddde
SH
1707 const void *daddr, const void *saddr,
1708 unsigned len)
0c4e8581 1709{
f1ecfd5d 1710 if (!dev->header_ops || !dev->header_ops->create)
0c4e8581 1711 return 0;
3b04ddde
SH
1712
1713 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
0c4e8581
SH
1714}
1715
b95cce35
SH
1716static inline int dev_parse_header(const struct sk_buff *skb,
1717 unsigned char *haddr)
1718{
1719 const struct net_device *dev = skb->dev;
1720
1b83336b 1721 if (!dev->header_ops || !dev->header_ops->parse)
b95cce35 1722 return 0;
3b04ddde 1723 return dev->header_ops->parse(skb, haddr);
b95cce35
SH
1724}
1725
1da177e4
LT
1726typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1727extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1728static inline int unregister_gifconf(unsigned int family)
1729{
1730 return register_gifconf(family, NULL);
1731}
1732
1733/*
88751275 1734 * Incoming packets are placed on per-cpu queues
1da177e4 1735 */
d94d9fee 1736struct softnet_data {
37437bb2 1737 struct Qdisc *output_queue;
a9cbd588 1738 struct Qdisc **output_queue_tailp;
1da177e4 1739 struct list_head poll_list;
1da177e4 1740 struct sk_buff *completion_queue;
6e7676c1 1741 struct sk_buff_head process_queue;
1da177e4 1742
dee42870 1743 /* stats */
cd7b5396
DM
1744 unsigned int processed;
1745 unsigned int time_squeeze;
1746 unsigned int cpu_collision;
1747 unsigned int received_rps;
dee42870 1748
fd793d89 1749#ifdef CONFIG_RPS
88751275
ED
1750 struct softnet_data *rps_ipi_list;
1751
1752 /* Elements below can be accessed between CPUs for RPS */
0a9627f2 1753 struct call_single_data csd ____cacheline_aligned_in_smp;
88751275
ED
1754 struct softnet_data *rps_ipi_next;
1755 unsigned int cpu;
fec5e652 1756 unsigned int input_queue_head;
76cc8b13 1757 unsigned int input_queue_tail;
1e94d72f 1758#endif
dee42870 1759 unsigned dropped;
0a9627f2 1760 struct sk_buff_head input_pkt_queue;
bea3348e 1761 struct napi_struct backlog;
1da177e4
LT
1762};
1763
76cc8b13 1764static inline void input_queue_head_incr(struct softnet_data *sd)
fec5e652
TH
1765{
1766#ifdef CONFIG_RPS
76cc8b13
TH
1767 sd->input_queue_head++;
1768#endif
1769}
1770
1771static inline void input_queue_tail_incr_save(struct softnet_data *sd,
1772 unsigned int *qtail)
1773{
1774#ifdef CONFIG_RPS
1775 *qtail = ++sd->input_queue_tail;
fec5e652
TH
1776#endif
1777}
1778
0a9627f2 1779DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
1da177e4
LT
1780
1781#define HAVE_NETIF_QUEUE
1782
37437bb2 1783extern void __netif_schedule(struct Qdisc *q);
1da177e4 1784
86d804e1 1785static inline void netif_schedule_queue(struct netdev_queue *txq)
1da177e4 1786{
79d16385 1787 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
37437bb2 1788 __netif_schedule(txq->qdisc);
86d804e1
DM
1789}
1790
fd2ea0a7
DM
1791static inline void netif_tx_schedule_all(struct net_device *dev)
1792{
1793 unsigned int i;
1794
1795 for (i = 0; i < dev->num_tx_queues; i++)
1796 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1797}
1798
d29f749e
DJ
1799static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1800{
1801 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1802}
1803
bea3348e
SH
1804/**
1805 * netif_start_queue - allow transmit
1806 * @dev: network device
1807 *
1808 * Allow upper layers to call the device hard_start_xmit routine.
1809 */
1da177e4
LT
1810static inline void netif_start_queue(struct net_device *dev)
1811{
e8a0464c 1812 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1da177e4
LT
1813}
1814
fd2ea0a7
DM
1815static inline void netif_tx_start_all_queues(struct net_device *dev)
1816{
1817 unsigned int i;
1818
1819 for (i = 0; i < dev->num_tx_queues; i++) {
1820 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1821 netif_tx_start_queue(txq);
1822 }
1823}
1824
79d16385 1825static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1da177e4
LT
1826{
1827#ifdef CONFIG_NETPOLL_TRAP
5f286e11 1828 if (netpoll_trap()) {
7b3d3e4f 1829 netif_tx_start_queue(dev_queue);
1da177e4 1830 return;
5f286e11 1831 }
1da177e4 1832#endif
79d16385 1833 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
37437bb2 1834 __netif_schedule(dev_queue->qdisc);
79d16385
DM
1835}
1836
d29f749e
DJ
1837/**
1838 * netif_wake_queue - restart transmit
1839 * @dev: network device
1840 *
1841 * Allow upper layers to call the device hard_start_xmit routine.
1842 * Used for flow control when transmit resources are available.
1843 */
79d16385
DM
1844static inline void netif_wake_queue(struct net_device *dev)
1845{
e8a0464c 1846 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1da177e4
LT
1847}
1848
fd2ea0a7
DM
1849static inline void netif_tx_wake_all_queues(struct net_device *dev)
1850{
1851 unsigned int i;
1852
1853 for (i = 0; i < dev->num_tx_queues; i++) {
1854 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1855 netif_tx_wake_queue(txq);
1856 }
1857}
1858
d29f749e
DJ
1859static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1860{
18543a64 1861 if (WARN_ON(!dev_queue)) {
256ee435 1862 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
18543a64
GC
1863 return;
1864 }
d29f749e
DJ
1865 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1866}
1867
bea3348e
SH
1868/**
1869 * netif_stop_queue - stop transmitted packets
1870 * @dev: network device
1871 *
1872 * Stop upper layers calling the device hard_start_xmit routine.
1873 * Used for flow control when transmit resources are unavailable.
1874 */
1da177e4
LT
1875static inline void netif_stop_queue(struct net_device *dev)
1876{
e8a0464c 1877 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1da177e4
LT
1878}
1879
fd2ea0a7
DM
1880static inline void netif_tx_stop_all_queues(struct net_device *dev)
1881{
1882 unsigned int i;
1883
1884 for (i = 0; i < dev->num_tx_queues; i++) {
1885 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1886 netif_tx_stop_queue(txq);
1887 }
1888}
1889
d29f749e
DJ
1890static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1891{
1892 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1893}
1894
bea3348e
SH
1895/**
1896 * netif_queue_stopped - test if transmit queue is flowblocked
1897 * @dev: network device
1898 *
1899 * Test if transmit queue on device is currently unable to send.
1900 */
1da177e4
LT
1901static inline int netif_queue_stopped(const struct net_device *dev)
1902{
e8a0464c 1903 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1da177e4
LT
1904}
1905
5a0d2268 1906static inline int netif_tx_queue_frozen_or_stopped(const struct netdev_queue *dev_queue)
c3f26a26 1907{
5a0d2268 1908 return dev_queue->state & QUEUE_STATE_XOFF_OR_FROZEN;
c3f26a26
DM
1909}
1910
bea3348e
SH
1911/**
1912 * netif_running - test if up
1913 * @dev: network device
1914 *
1915 * Test if the device has been brought up.
1916 */
1da177e4
LT
1917static inline int netif_running(const struct net_device *dev)
1918{
1919 return test_bit(__LINK_STATE_START, &dev->state);
1920}
1921
f25f4e44
PWJ
1922/*
1923 * Routines to manage the subqueues on a device. We only need start
1924 * stop, and a check if it's stopped. All other device management is
1925 * done at the overall netdevice level.
1926 * Also test the device if we're multiqueue.
1927 */
bea3348e
SH
1928
1929/**
1930 * netif_start_subqueue - allow sending packets on subqueue
1931 * @dev: network device
1932 * @queue_index: sub queue index
1933 *
1934 * Start individual transmit queue of a device with multiple transmit queues.
1935 */
f25f4e44
PWJ
1936static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1937{
fd2ea0a7 1938 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
7b3d3e4f
KK
1939
1940 netif_tx_start_queue(txq);
f25f4e44
PWJ
1941}
1942
bea3348e
SH
1943/**
1944 * netif_stop_subqueue - stop sending packets on subqueue
1945 * @dev: network device
1946 * @queue_index: sub queue index
1947 *
1948 * Stop individual transmit queue of a device with multiple transmit queues.
1949 */
f25f4e44
PWJ
1950static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1951{
fd2ea0a7 1952 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
f25f4e44
PWJ
1953#ifdef CONFIG_NETPOLL_TRAP
1954 if (netpoll_trap())
1955 return;
1956#endif
7b3d3e4f 1957 netif_tx_stop_queue(txq);
f25f4e44
PWJ
1958}
1959
bea3348e
SH
1960/**
1961 * netif_subqueue_stopped - test status of subqueue
1962 * @dev: network device
1963 * @queue_index: sub queue index
1964 *
1965 * Check individual transmit queue of a device with multiple transmit queues.
1966 */
668f895a 1967static inline int __netif_subqueue_stopped(const struct net_device *dev,
f25f4e44
PWJ
1968 u16 queue_index)
1969{
fd2ea0a7 1970 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
7b3d3e4f
KK
1971
1972 return netif_tx_queue_stopped(txq);
f25f4e44
PWJ
1973}
1974
668f895a
PE
1975static inline int netif_subqueue_stopped(const struct net_device *dev,
1976 struct sk_buff *skb)
1977{
1978 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1979}
bea3348e
SH
1980
1981/**
1982 * netif_wake_subqueue - allow sending packets on subqueue
1983 * @dev: network device
1984 * @queue_index: sub queue index
1985 *
1986 * Resume individual transmit queue of a device with multiple transmit queues.
1987 */
f25f4e44
PWJ
1988static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1989{
fd2ea0a7 1990 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
f25f4e44
PWJ
1991#ifdef CONFIG_NETPOLL_TRAP
1992 if (netpoll_trap())
1993 return;
1994#endif
fd2ea0a7 1995 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
37437bb2 1996 __netif_schedule(txq->qdisc);
f25f4e44
PWJ
1997}
1998
a3d22a68
VZ
1999/*
2000 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2001 * as a distribution range limit for the returned value.
2002 */
2003static inline u16 skb_tx_hash(const struct net_device *dev,
2004 const struct sk_buff *skb)
2005{
2006 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
2007}
2008
bea3348e
SH
2009/**
2010 * netif_is_multiqueue - test if device has multiple transmit queues
2011 * @dev: network device
2012 *
2013 * Check if device has multiple transmit queues
bea3348e 2014 */
f25f4e44
PWJ
2015static inline int netif_is_multiqueue(const struct net_device *dev)
2016{
a02cec21 2017 return dev->num_tx_queues > 1;
f25f4e44 2018}
1da177e4 2019
e6484930
TH
2020extern int netif_set_real_num_tx_queues(struct net_device *dev,
2021 unsigned int txq);
f0796d5c 2022
62fe0b40
BH
2023#ifdef CONFIG_RPS
2024extern int netif_set_real_num_rx_queues(struct net_device *dev,
2025 unsigned int rxq);
2026#else
2027static inline int netif_set_real_num_rx_queues(struct net_device *dev,
2028 unsigned int rxq)
2029{
2030 return 0;
2031}
2032#endif
2033
3171d026
BH
2034static inline int netif_copy_real_num_queues(struct net_device *to_dev,
2035 const struct net_device *from_dev)
2036{
2037 netif_set_real_num_tx_queues(to_dev, from_dev->real_num_tx_queues);
2038#ifdef CONFIG_RPS
2039 return netif_set_real_num_rx_queues(to_dev,
2040 from_dev->real_num_rx_queues);
2041#else
2042 return 0;
2043#endif
2044}
2045
1da177e4 2046/* Use this variant when it is known for sure that it
0ef47309
ML
2047 * is executing from hardware interrupt context or with hardware interrupts
2048 * disabled.
1da177e4 2049 */
bea3348e 2050extern void dev_kfree_skb_irq(struct sk_buff *skb);
1da177e4
LT
2051
2052/* Use this variant in places where it could be invoked
0ef47309
ML
2053 * from either hardware interrupt or other context, with hardware interrupts
2054 * either disabled or enabled.
1da177e4 2055 */
56079431 2056extern void dev_kfree_skb_any(struct sk_buff *skb);
1da177e4
LT
2057
2058#define HAVE_NETIF_RX 1
2059extern int netif_rx(struct sk_buff *skb);
2060extern int netif_rx_ni(struct sk_buff *skb);
2061#define HAVE_NETIF_RECEIVE_SKB 1
2062extern int netif_receive_skb(struct sk_buff *skb);
5b252f0c 2063extern gro_result_t dev_gro_receive(struct napi_struct *napi,
96e93eab 2064 struct sk_buff *skb);
c7c4b3b6
BH
2065extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
2066extern gro_result_t napi_gro_receive(struct napi_struct *napi,
d565b0a1 2067 struct sk_buff *skb);
86cac58b 2068extern void napi_gro_flush(struct napi_struct *napi);
76620aaf 2069extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
c7c4b3b6 2070extern gro_result_t napi_frags_finish(struct napi_struct *napi,
5b252f0c
BH
2071 struct sk_buff *skb,
2072 gro_result_t ret);
76620aaf 2073extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
c7c4b3b6 2074extern gro_result_t napi_gro_frags(struct napi_struct *napi);
76620aaf
HX
2075
2076static inline void napi_free_frags(struct napi_struct *napi)
2077{
2078 kfree_skb(napi->skb);
2079 napi->skb = NULL;
2080}
2081
ab95bfe0 2082extern int netdev_rx_handler_register(struct net_device *dev,
93e2c32b
JP
2083 rx_handler_func_t *rx_handler,
2084 void *rx_handler_data);
ab95bfe0
JP
2085extern void netdev_rx_handler_unregister(struct net_device *dev);
2086
c2373ee9 2087extern int dev_valid_name(const char *name);
881d966b
EB
2088extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
2089extern int dev_ethtool(struct net *net, struct ifreq *);
1da177e4 2090extern unsigned dev_get_flags(const struct net_device *);
bd380811 2091extern int __dev_change_flags(struct net_device *, unsigned int flags);
1da177e4 2092extern int dev_change_flags(struct net_device *, unsigned);
bd380811 2093extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
cf04a4c7 2094extern int dev_change_name(struct net_device *, const char *);
0b815a1a 2095extern int dev_set_alias(struct net_device *, const char *, size_t);
ce286d32
EB
2096extern int dev_change_net_namespace(struct net_device *,
2097 struct net *, const char *);
1da177e4 2098extern int dev_set_mtu(struct net_device *, int);
cbda10fa 2099extern void dev_set_group(struct net_device *, int);
1da177e4
LT
2100extern int dev_set_mac_address(struct net_device *,
2101 struct sockaddr *);
f6a78bfc 2102extern int dev_hard_start_xmit(struct sk_buff *skb,
fd2ea0a7
DM
2103 struct net_device *dev,
2104 struct netdev_queue *txq);
44540960
AB
2105extern int dev_forward_skb(struct net_device *dev,
2106 struct sk_buff *skb);
1da177e4 2107
20380731 2108extern int netdev_budget;
1da177e4
LT
2109
2110/* Called by rtnetlink.c:rtnl_unlock() */
2111extern void netdev_run_todo(void);
2112
bea3348e
SH
2113/**
2114 * dev_put - release reference to device
2115 * @dev: network device
2116 *
9ef4429b 2117 * Release reference to device to allow it to be freed.
bea3348e 2118 */
1da177e4
LT
2119static inline void dev_put(struct net_device *dev)
2120{
29b4433d 2121 irqsafe_cpu_dec(*dev->pcpu_refcnt);
1da177e4
LT
2122}
2123
bea3348e
SH
2124/**
2125 * dev_hold - get reference to device
2126 * @dev: network device
2127 *
9ef4429b 2128 * Hold reference to device to keep it from being freed.
bea3348e 2129 */
15333061
SH
2130static inline void dev_hold(struct net_device *dev)
2131{
29b4433d 2132 irqsafe_cpu_inc(*dev->pcpu_refcnt);
15333061 2133}
1da177e4
LT
2134
2135/* Carrier loss detection, dial on demand. The functions netif_carrier_on
2136 * and _off may be called from IRQ context, but it is caller
2137 * who is responsible for serialization of these calls.
b00055aa
SR
2138 *
2139 * The name carrier is inappropriate, these functions should really be
2140 * called netif_lowerlayer_*() because they represent the state of any
2141 * kind of lower layer not just hardware media.
1da177e4
LT
2142 */
2143
2144extern void linkwatch_fire_event(struct net_device *dev);
e014debe 2145extern void linkwatch_forget_dev(struct net_device *dev);
1da177e4 2146
bea3348e
SH
2147/**
2148 * netif_carrier_ok - test if carrier present
2149 * @dev: network device
2150 *
2151 * Check if carrier is present on device
2152 */
1da177e4
LT
2153static inline int netif_carrier_ok(const struct net_device *dev)
2154{
2155 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
2156}
2157
9d21493b
ED
2158extern unsigned long dev_trans_start(struct net_device *dev);
2159
1da177e4
LT
2160extern void __netdev_watchdog_up(struct net_device *dev);
2161
0a242efc 2162extern void netif_carrier_on(struct net_device *dev);
1da177e4 2163
0a242efc 2164extern void netif_carrier_off(struct net_device *dev);
1da177e4 2165
06c4648d
IC
2166extern void netif_notify_peers(struct net_device *dev);
2167
bea3348e
SH
2168/**
2169 * netif_dormant_on - mark device as dormant.
2170 * @dev: network device
2171 *
2172 * Mark device as dormant (as per RFC2863).
2173 *
2174 * The dormant state indicates that the relevant interface is not
2175 * actually in a condition to pass packets (i.e., it is not 'up') but is
2176 * in a "pending" state, waiting for some external event. For "on-
2177 * demand" interfaces, this new state identifies the situation where the
2178 * interface is waiting for events to place it in the up state.
2179 *
2180 */
b00055aa
SR
2181static inline void netif_dormant_on(struct net_device *dev)
2182{
2183 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
2184 linkwatch_fire_event(dev);
2185}
2186
bea3348e
SH
2187/**
2188 * netif_dormant_off - set device as not dormant.
2189 * @dev: network device
2190 *
2191 * Device is not in dormant state.
2192 */
b00055aa
SR
2193static inline void netif_dormant_off(struct net_device *dev)
2194{
2195 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
2196 linkwatch_fire_event(dev);
2197}
2198
bea3348e
SH
2199/**
2200 * netif_dormant - test if carrier present
2201 * @dev: network device
2202 *
2203 * Check if carrier is present on device
2204 */
b00055aa
SR
2205static inline int netif_dormant(const struct net_device *dev)
2206{
2207 return test_bit(__LINK_STATE_DORMANT, &dev->state);
2208}
2209
2210
bea3348e
SH
2211/**
2212 * netif_oper_up - test if device is operational
2213 * @dev: network device
2214 *
2215 * Check if carrier is operational
2216 */
d94d9fee
ED
2217static inline int netif_oper_up(const struct net_device *dev)
2218{
b00055aa
SR
2219 return (dev->operstate == IF_OPER_UP ||
2220 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
2221}
2222
bea3348e
SH
2223/**
2224 * netif_device_present - is device available or removed
2225 * @dev: network device
2226 *
2227 * Check if device has not been removed from system.
2228 */
1da177e4
LT
2229static inline int netif_device_present(struct net_device *dev)
2230{
2231 return test_bit(__LINK_STATE_PRESENT, &dev->state);
2232}
2233
56079431 2234extern void netif_device_detach(struct net_device *dev);
1da177e4 2235
56079431 2236extern void netif_device_attach(struct net_device *dev);
1da177e4
LT
2237
2238/*
2239 * Network interface message level settings
2240 */
2241#define HAVE_NETIF_MSG 1
2242
2243enum {
2244 NETIF_MSG_DRV = 0x0001,
2245 NETIF_MSG_PROBE = 0x0002,
2246 NETIF_MSG_LINK = 0x0004,
2247 NETIF_MSG_TIMER = 0x0008,
2248 NETIF_MSG_IFDOWN = 0x0010,
2249 NETIF_MSG_IFUP = 0x0020,
2250 NETIF_MSG_RX_ERR = 0x0040,
2251 NETIF_MSG_TX_ERR = 0x0080,
2252 NETIF_MSG_TX_QUEUED = 0x0100,
2253 NETIF_MSG_INTR = 0x0200,
2254 NETIF_MSG_TX_DONE = 0x0400,
2255 NETIF_MSG_RX_STATUS = 0x0800,
2256 NETIF_MSG_PKTDATA = 0x1000,
2257 NETIF_MSG_HW = 0x2000,
2258 NETIF_MSG_WOL = 0x4000,
2259};
2260
2261#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2262#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2263#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2264#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2265#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2266#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2267#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2268#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2269#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2270#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2271#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2272#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2273#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2274#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2275#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2276
2277static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
2278{
2279 /* use default */
2280 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
2281 return default_msg_enable_bits;
2282 if (debug_value == 0) /* no output */
2283 return 0;
2284 /* set low N bits */
2285 return (1 << debug_value) - 1;
2286}
2287
c773e847 2288static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
932ff279 2289{
c773e847
DM
2290 spin_lock(&txq->_xmit_lock);
2291 txq->xmit_lock_owner = cpu;
22dd7495
JHS
2292}
2293
fd2ea0a7
DM
2294static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
2295{
2296 spin_lock_bh(&txq->_xmit_lock);
2297 txq->xmit_lock_owner = smp_processor_id();
2298}
2299
c3f26a26
DM
2300static inline int __netif_tx_trylock(struct netdev_queue *txq)
2301{
2302 int ok = spin_trylock(&txq->_xmit_lock);
2303 if (likely(ok))
2304 txq->xmit_lock_owner = smp_processor_id();
2305 return ok;
2306}
2307
2308static inline void __netif_tx_unlock(struct netdev_queue *txq)
2309{
2310 txq->xmit_lock_owner = -1;
2311 spin_unlock(&txq->_xmit_lock);
2312}
2313
2314static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
2315{
2316 txq->xmit_lock_owner = -1;
2317 spin_unlock_bh(&txq->_xmit_lock);
2318}
2319
08baf561
ED
2320static inline void txq_trans_update(struct netdev_queue *txq)
2321{
2322 if (txq->xmit_lock_owner != -1)
2323 txq->trans_start = jiffies;
2324}
2325
d29f749e
DJ
2326/**
2327 * netif_tx_lock - grab network device transmit lock
2328 * @dev: network device
d29f749e
DJ
2329 *
2330 * Get network device transmit lock
2331 */
22dd7495
JHS
2332static inline void netif_tx_lock(struct net_device *dev)
2333{
e8a0464c 2334 unsigned int i;
c3f26a26 2335 int cpu;
c773e847 2336
c3f26a26
DM
2337 spin_lock(&dev->tx_global_lock);
2338 cpu = smp_processor_id();
e8a0464c
DM
2339 for (i = 0; i < dev->num_tx_queues; i++) {
2340 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
c3f26a26
DM
2341
2342 /* We are the only thread of execution doing a
2343 * freeze, but we have to grab the _xmit_lock in
2344 * order to synchronize with threads which are in
2345 * the ->hard_start_xmit() handler and already
2346 * checked the frozen bit.
2347 */
e8a0464c 2348 __netif_tx_lock(txq, cpu);
c3f26a26
DM
2349 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
2350 __netif_tx_unlock(txq);
e8a0464c 2351 }
932ff279
HX
2352}
2353
2354static inline void netif_tx_lock_bh(struct net_device *dev)
2355{
e8a0464c
DM
2356 local_bh_disable();
2357 netif_tx_lock(dev);
932ff279
HX
2358}
2359
932ff279
HX
2360static inline void netif_tx_unlock(struct net_device *dev)
2361{
e8a0464c
DM
2362 unsigned int i;
2363
2364 for (i = 0; i < dev->num_tx_queues; i++) {
2365 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
c773e847 2366
c3f26a26
DM
2367 /* No need to grab the _xmit_lock here. If the
2368 * queue is not stopped for another reason, we
2369 * force a schedule.
2370 */
2371 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
7b3d3e4f 2372 netif_schedule_queue(txq);
c3f26a26
DM
2373 }
2374 spin_unlock(&dev->tx_global_lock);
932ff279
HX
2375}
2376
2377static inline void netif_tx_unlock_bh(struct net_device *dev)
2378{
e8a0464c
DM
2379 netif_tx_unlock(dev);
2380 local_bh_enable();
932ff279
HX
2381}
2382
c773e847 2383#define HARD_TX_LOCK(dev, txq, cpu) { \
22dd7495 2384 if ((dev->features & NETIF_F_LLTX) == 0) { \
c773e847 2385 __netif_tx_lock(txq, cpu); \
22dd7495
JHS
2386 } \
2387}
2388
c773e847 2389#define HARD_TX_UNLOCK(dev, txq) { \
22dd7495 2390 if ((dev->features & NETIF_F_LLTX) == 0) { \
c773e847 2391 __netif_tx_unlock(txq); \
22dd7495
JHS
2392 } \
2393}
2394
1da177e4
LT
2395static inline void netif_tx_disable(struct net_device *dev)
2396{
fd2ea0a7 2397 unsigned int i;
c3f26a26 2398 int cpu;
fd2ea0a7 2399
c3f26a26
DM
2400 local_bh_disable();
2401 cpu = smp_processor_id();
fd2ea0a7
DM
2402 for (i = 0; i < dev->num_tx_queues; i++) {
2403 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
c3f26a26
DM
2404
2405 __netif_tx_lock(txq, cpu);
fd2ea0a7 2406 netif_tx_stop_queue(txq);
c3f26a26 2407 __netif_tx_unlock(txq);
fd2ea0a7 2408 }
c3f26a26 2409 local_bh_enable();
1da177e4
LT
2410}
2411
e308a5d8
DM
2412static inline void netif_addr_lock(struct net_device *dev)
2413{
2414 spin_lock(&dev->addr_list_lock);
2415}
2416
2417static inline void netif_addr_lock_bh(struct net_device *dev)
2418{
2419 spin_lock_bh(&dev->addr_list_lock);
2420}
2421
2422static inline void netif_addr_unlock(struct net_device *dev)
2423{
2424 spin_unlock(&dev->addr_list_lock);
2425}
2426
2427static inline void netif_addr_unlock_bh(struct net_device *dev)
2428{
2429 spin_unlock_bh(&dev->addr_list_lock);
2430}
2431
f001fde5 2432/*
31278e71 2433 * dev_addrs walker. Should be used only for read access. Call with
f001fde5
JP
2434 * rcu_read_lock held.
2435 */
2436#define for_each_dev_addr(dev, ha) \
31278e71 2437 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
f001fde5 2438
1da177e4
LT
2439/* These functions live elsewhere (drivers/net/net_init.c, but related) */
2440
2441extern void ether_setup(struct net_device *dev);
2442
2443/* Support for loadable net-drivers */
36909ea4 2444extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
f25f4e44 2445 void (*setup)(struct net_device *),
36909ea4 2446 unsigned int txqs, unsigned int rxqs);
f25f4e44 2447#define alloc_netdev(sizeof_priv, name, setup) \
36909ea4
TH
2448 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2449
2450#define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2451 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2452
1da177e4
LT
2453extern int register_netdev(struct net_device *dev);
2454extern void unregister_netdev(struct net_device *dev);
f001fde5 2455
22bedad3
JP
2456/* General hardware address lists handling functions */
2457extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
2458 struct netdev_hw_addr_list *from_list,
2459 int addr_len, unsigned char addr_type);
2460extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
2461 struct netdev_hw_addr_list *from_list,
2462 int addr_len, unsigned char addr_type);
2463extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
2464 struct netdev_hw_addr_list *from_list,
2465 int addr_len);
2466extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
2467 struct netdev_hw_addr_list *from_list,
2468 int addr_len);
2469extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
2470extern void __hw_addr_init(struct netdev_hw_addr_list *list);
2471
f001fde5
JP
2472/* Functions used for device addresses handling */
2473extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
2474 unsigned char addr_type);
2475extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
2476 unsigned char addr_type);
2477extern int dev_addr_add_multiple(struct net_device *to_dev,
2478 struct net_device *from_dev,
2479 unsigned char addr_type);
2480extern int dev_addr_del_multiple(struct net_device *to_dev,
2481 struct net_device *from_dev,
2482 unsigned char addr_type);
a748ee24
JP
2483extern void dev_addr_flush(struct net_device *dev);
2484extern int dev_addr_init(struct net_device *dev);
2485
2486/* Functions used for unicast addresses handling */
2487extern int dev_uc_add(struct net_device *dev, unsigned char *addr);
2488extern int dev_uc_del(struct net_device *dev, unsigned char *addr);
2489extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2490extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
2491extern void dev_uc_flush(struct net_device *dev);
2492extern void dev_uc_init(struct net_device *dev);
f001fde5 2493
22bedad3
JP
2494/* Functions used for multicast addresses handling */
2495extern int dev_mc_add(struct net_device *dev, unsigned char *addr);
2496extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr);
2497extern int dev_mc_del(struct net_device *dev, unsigned char *addr);
2498extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr);
2499extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2500extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
2501extern void dev_mc_flush(struct net_device *dev);
2502extern void dev_mc_init(struct net_device *dev);
f001fde5 2503
4417da66
PM
2504/* Functions used for secondary unicast and multicast support */
2505extern void dev_set_rx_mode(struct net_device *dev);
2506extern void __dev_set_rx_mode(struct net_device *dev);
dad9b335
WC
2507extern int dev_set_promiscuity(struct net_device *dev, int inc);
2508extern int dev_set_allmulti(struct net_device *dev, int inc);
1da177e4 2509extern void netdev_state_change(struct net_device *dev);
3ca5b404 2510extern int netdev_bonding_change(struct net_device *dev,
75c78500 2511 unsigned long event);
d8a33ac4 2512extern void netdev_features_change(struct net_device *dev);
1da177e4 2513/* Load a device via the kmod */
881d966b 2514extern void dev_load(struct net *net, const char *name);
1da177e4 2515extern void dev_mcast_init(void);
d7753516
BH
2516extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
2517 struct rtnl_link_stats64 *storage);
eeda3fd6 2518
1da177e4 2519extern int netdev_max_backlog;
3b098e2d 2520extern int netdev_tstamp_prequeue;
1da177e4 2521extern int weight_p;
0a14842f 2522extern int bpf_jit_enable;
1da177e4 2523extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1765a575
JP
2524extern int netdev_set_bond_master(struct net_device *dev,
2525 struct net_device *master);
84fa7933 2526extern int skb_checksum_help(struct sk_buff *skb);
04ed3e74 2527extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, u32 features);
fb286bb2
HX
2528#ifdef CONFIG_BUG
2529extern void netdev_rx_csum_fault(struct net_device *dev);
2530#else
2531static inline void netdev_rx_csum_fault(struct net_device *dev)
2532{
2533}
2534#endif
1da177e4
LT
2535/* rx skb timestamps */
2536extern void net_enable_timestamp(void);
2537extern void net_disable_timestamp(void);
2538
20380731
ACM
2539#ifdef CONFIG_PROC_FS
2540extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
2541extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
2542extern void dev_seq_stop(struct seq_file *seq, void *v);
2543#endif
2544
b8a9787e
JV
2545extern int netdev_class_create_file(struct class_attribute *class_attr);
2546extern void netdev_class_remove_file(struct class_attribute *class_attr);
2547
04600794
JB
2548extern struct kobj_ns_type_operations net_ns_type_operations;
2549
cf04a4c7 2550extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
6579e57b 2551
20380731
ACM
2552extern void linkwatch_run_queue(void);
2553
5455c699
MM
2554static inline u32 netdev_get_wanted_features(struct net_device *dev)
2555{
2556 return (dev->features & ~dev->hw_features) | dev->wanted_features;
2557}
04ed3e74 2558u32 netdev_increment_features(u32 all, u32 one, u32 mask);
acd1130e 2559u32 netdev_fix_features(struct net_device *dev, u32 features);
6cb6a27c 2560int __netdev_update_features(struct net_device *dev);
5455c699 2561void netdev_update_features(struct net_device *dev);
7f353bf2 2562
fc4a7489
PM
2563void netif_stacked_transfer_operstate(const struct net_device *rootdev,
2564 struct net_device *dev);
2565
04ed3e74 2566u32 netif_skb_features(struct sk_buff *skb);
58e998c6 2567
04ed3e74 2568static inline int net_gso_ok(u32 features, int gso_type)
576a30eb 2569{
bcd76111 2570 int feature = gso_type << NETIF_F_GSO_SHIFT;
d6b4991a 2571 return (features & feature) == feature;
576a30eb
HX
2572}
2573
04ed3e74 2574static inline int skb_gso_ok(struct sk_buff *skb, u32 features)
bcd76111 2575{
278b2513 2576 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
21dc3301 2577 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
bcd76111
HX
2578}
2579
fc741216 2580static inline int netif_needs_gso(struct sk_buff *skb, int features)
7967168c 2581{
fc741216
JG
2582 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
2583 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
7967168c
HX
2584}
2585
82cc1a7a
PWJ
2586static inline void netif_set_gso_max_size(struct net_device *dev,
2587 unsigned int size)
2588{
2589 dev->gso_max_size = size;
2590}
2591
1765a575
JP
2592static inline int netif_is_bond_slave(struct net_device *dev)
2593{
2594 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
2595}
2596
505d4f73 2597extern struct pernet_operations __net_initdata loopback_net_ops;
b1b67dd4
PM
2598
2599static inline int dev_ethtool_get_settings(struct net_device *dev,
2600 struct ethtool_cmd *cmd)
2601{
2602 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2603 return -EOPNOTSUPP;
2604 return dev->ethtool_ops->get_settings(dev, cmd);
2605}
2606
2607static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2608{
4dd5ffe4
MM
2609 if (dev->features & NETIF_F_RXCSUM)
2610 return 1;
b1b67dd4
PM
2611 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2612 return 0;
2613 return dev->ethtool_ops->get_rx_csum(dev);
2614}
2615
2616static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2617{
2618 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2619 return 0;
2620 return dev->ethtool_ops->get_flags(dev);
2621}
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JP
2622
2623/* Logging, debugging and troubleshooting/diagnostic helpers. */
2624
2625/* netdev_printk helpers, similar to dev_printk */
2626
2627static inline const char *netdev_name(const struct net_device *dev)
2628{
2629 if (dev->reg_state != NETREG_REGISTERED)
2630 return "(unregistered net_device)";
2631 return dev->name;
2632}
2633
256df2f3
JP
2634extern int netdev_printk(const char *level, const struct net_device *dev,
2635 const char *format, ...)
2636 __attribute__ ((format (printf, 3, 4)));
2637extern int netdev_emerg(const struct net_device *dev, const char *format, ...)
2638 __attribute__ ((format (printf, 2, 3)));
2639extern int netdev_alert(const struct net_device *dev, const char *format, ...)
2640 __attribute__ ((format (printf, 2, 3)));
2641extern int netdev_crit(const struct net_device *dev, const char *format, ...)
2642 __attribute__ ((format (printf, 2, 3)));
2643extern int netdev_err(const struct net_device *dev, const char *format, ...)
2644 __attribute__ ((format (printf, 2, 3)));
2645extern int netdev_warn(const struct net_device *dev, const char *format, ...)
2646 __attribute__ ((format (printf, 2, 3)));
2647extern int netdev_notice(const struct net_device *dev, const char *format, ...)
2648 __attribute__ ((format (printf, 2, 3)));
2649extern int netdev_info(const struct net_device *dev, const char *format, ...)
2650 __attribute__ ((format (printf, 2, 3)));
571ba423 2651
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VK
2652#define MODULE_ALIAS_NETDEV(device) \
2653 MODULE_ALIAS("netdev-" device)
2654
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JP
2655#if defined(DEBUG)
2656#define netdev_dbg(__dev, format, args...) \
2657 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2658#elif defined(CONFIG_DYNAMIC_DEBUG)
2659#define netdev_dbg(__dev, format, args...) \
2660do { \
2661 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
2662 netdev_name(__dev), ##args); \
2663} while (0)
2664#else
2665#define netdev_dbg(__dev, format, args...) \
2666({ \
2667 if (0) \
2668 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2669 0; \
2670})
2671#endif
2672
2673#if defined(VERBOSE_DEBUG)
2674#define netdev_vdbg netdev_dbg
2675#else
2676
2677#define netdev_vdbg(dev, format, args...) \
2678({ \
2679 if (0) \
2680 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2681 0; \
2682})
2683#endif
2684
2685/*
2686 * netdev_WARN() acts like dev_printk(), but with the key difference
2687 * of using a WARN/WARN_ON to get the message out, including the
2688 * file/line information and a backtrace.
2689 */
2690#define netdev_WARN(dev, format, args...) \
2691 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2692
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JP
2693/* netif printk helpers, similar to netdev_printk */
2694
2695#define netif_printk(priv, type, level, dev, fmt, args...) \
2696do { \
2697 if (netif_msg_##type(priv)) \
2698 netdev_printk(level, (dev), fmt, ##args); \
2699} while (0)
2700
f45f4321
JP
2701#define netif_level(level, priv, type, dev, fmt, args...) \
2702do { \
2703 if (netif_msg_##type(priv)) \
2704 netdev_##level(dev, fmt, ##args); \
2705} while (0)
2706
b3d95c5c 2707#define netif_emerg(priv, type, dev, fmt, args...) \
f45f4321 2708 netif_level(emerg, priv, type, dev, fmt, ##args)
b3d95c5c 2709#define netif_alert(priv, type, dev, fmt, args...) \
f45f4321 2710 netif_level(alert, priv, type, dev, fmt, ##args)
b3d95c5c 2711#define netif_crit(priv, type, dev, fmt, args...) \
f45f4321 2712 netif_level(crit, priv, type, dev, fmt, ##args)
b3d95c5c 2713#define netif_err(priv, type, dev, fmt, args...) \
f45f4321 2714 netif_level(err, priv, type, dev, fmt, ##args)
b3d95c5c 2715#define netif_warn(priv, type, dev, fmt, args...) \
f45f4321 2716 netif_level(warn, priv, type, dev, fmt, ##args)
b3d95c5c 2717#define netif_notice(priv, type, dev, fmt, args...) \
f45f4321 2718 netif_level(notice, priv, type, dev, fmt, ##args)
b3d95c5c 2719#define netif_info(priv, type, dev, fmt, args...) \
f45f4321 2720 netif_level(info, priv, type, dev, fmt, ##args)
b3d95c5c
JP
2721
2722#if defined(DEBUG)
2723#define netif_dbg(priv, type, dev, format, args...) \
2724 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2725#elif defined(CONFIG_DYNAMIC_DEBUG)
2726#define netif_dbg(priv, type, netdev, format, args...) \
2727do { \
2728 if (netif_msg_##type(priv)) \
2729 dynamic_dev_dbg((netdev)->dev.parent, \
2730 "%s: " format, \
2731 netdev_name(netdev), ##args); \
2732} while (0)
2733#else
2734#define netif_dbg(priv, type, dev, format, args...) \
2735({ \
2736 if (0) \
2737 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2738 0; \
2739})
2740#endif
2741
2742#if defined(VERBOSE_DEBUG)
bcfcc450 2743#define netif_vdbg netif_dbg
b3d95c5c
JP
2744#else
2745#define netif_vdbg(priv, type, dev, format, args...) \
2746({ \
2747 if (0) \
a4ed89cb 2748 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
b3d95c5c
JP
2749 0; \
2750})
2751#endif
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2753#endif /* __KERNEL__ */
2754
385a154c 2755#endif /* _LINUX_NETDEVICE_H */