blob: 9d77b1d7dca806e540838d27bbc632961a340f0e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 *
Jesper Juhl02c30a82005-05-05 16:16:16 -070010 * Authors: Ross Biro
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 * 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>
Alan Cox113aa832008-10-13 19:01:08 -070014 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 * 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>
31
32#ifdef __KERNEL__
Al Virod7fe0f22006-12-03 23:15:30 -050033#include <linux/timer.h>
Stephen Hemmingerbea33482007-10-03 16:41:36 -070034#include <linux/delay.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <asm/atomic.h>
36#include <asm/cache.h>
37#include <asm/byteorder.h>
38
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <linux/device.h>
40#include <linux/percpu.h>
Chris Leechdb217332006-06-17 21:24:58 -070041#include <linux/dmaengine.h>
Stephen Hemmingerbea33482007-10-03 16:41:36 -070042#include <linux/workqueue.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
Daniel Lezcanoa050c332007-09-12 14:57:09 +020044#include <net/net_namespace.h>
Lennert Buytenhekcf85d082008-10-07 13:45:02 +000045#include <net/dsa.h>
Daniel Lezcanoa050c332007-09-12 14:57:09 +020046
Linus Torvalds1da177e2005-04-16 15:20:36 -070047struct vlan_group;
48struct ethtool_ops;
Jeff Moyer115c1d62005-06-22 22:05:31 -070049struct netpoll_info;
Johannes Berg704232c2007-04-23 12:20:05 -070050/* 802.11 specific */
51struct wireless_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 /* source back-compat hooks */
53#define SET_ETHTOOL_OPS(netdev,ops) \
54 ( (netdev)->ethtool_ops = (ops) )
55
56#define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
57 functions are available. */
58#define HAVE_FREE_NETDEV /* free_netdev() */
59#define HAVE_NETDEV_PRIV /* netdev_priv() */
60
61#define NET_XMIT_SUCCESS 0
62#define NET_XMIT_DROP 1 /* skb dropped */
63#define NET_XMIT_CN 2 /* congestion notification */
64#define NET_XMIT_POLICED 3 /* skb is shot by police */
Jarek Poplawski378a2f02008-08-04 22:31:03 -070065#define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
67/* Backlog congestion levels */
68#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
69#define NET_RX_DROP 1 /* packet dropped */
70#define NET_RX_CN_LOW 2 /* storm alert, just in case */
71#define NET_RX_CN_MOD 3 /* Storm on its way! */
72#define NET_RX_CN_HIGH 4 /* The storm is here */
73#define NET_RX_BAD 5 /* packet dropped due to kernel error */
74
Gerrit Renkerb9df3cb2006-11-14 11:21:36 -020075/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
76 * indicates that the device will soon be dropping packets, or already drops
77 * some packets of the same priority; prompting us to send less aggressively. */
78#define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
Linus Torvalds1da177e2005-04-16 15:20:36 -070079#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
80
81#endif
82
83#define MAX_ADDR_LEN 32 /* Largest hardware address length */
84
85/* Driver transmit return codes */
86#define NETDEV_TX_OK 0 /* driver took care of packet */
87#define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
88#define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
89
Adrian Bunkc88e6f52008-06-27 19:54:54 -070090#ifdef __KERNEL__
91
Linus Torvalds1da177e2005-04-16 15:20:36 -070092/*
93 * Compute the worst case header length according to the protocols
94 * used.
95 */
96
David S. Miller8388e3d2008-05-12 20:17:33 -070097#if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
98# if defined(CONFIG_MAC80211_MESH)
99# define LL_MAX_HEADER 128
100# else
101# define LL_MAX_HEADER 96
102# endif
103#elif defined(CONFIG_TR)
104# define LL_MAX_HEADER 48
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105#else
David S. Miller8388e3d2008-05-12 20:17:33 -0700106# define LL_MAX_HEADER 32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107#endif
108
David S. Millere81c73592006-11-28 20:53:39 -0800109#if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
110 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
111 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
112 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113#define MAX_HEADER LL_MAX_HEADER
114#else
115#define MAX_HEADER (LL_MAX_HEADER + 48)
116#endif
117
Adrian Bunkc88e6f52008-06-27 19:54:54 -0700118#endif /* __KERNEL__ */
119
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120/*
121 * Network device statistics. Akin to the 2.0 ether stats but
122 * with byte counters.
123 */
124
125struct net_device_stats
126{
127 unsigned long rx_packets; /* total packets received */
128 unsigned long tx_packets; /* total packets transmitted */
129 unsigned long rx_bytes; /* total bytes received */
130 unsigned long tx_bytes; /* total bytes transmitted */
131 unsigned long rx_errors; /* bad packets received */
132 unsigned long tx_errors; /* packet transmit problems */
133 unsigned long rx_dropped; /* no space in linux buffers */
134 unsigned long tx_dropped; /* no space available in linux */
135 unsigned long multicast; /* multicast packets received */
136 unsigned long collisions;
137
138 /* detailed rx_errors: */
139 unsigned long rx_length_errors;
140 unsigned long rx_over_errors; /* receiver ring buff overflow */
141 unsigned long rx_crc_errors; /* recved pkt with crc error */
142 unsigned long rx_frame_errors; /* recv'd frame alignment error */
143 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
144 unsigned long rx_missed_errors; /* receiver missed packet */
145
146 /* detailed tx_errors */
147 unsigned long tx_aborted_errors;
148 unsigned long tx_carrier_errors;
149 unsigned long tx_fifo_errors;
150 unsigned long tx_heartbeat_errors;
151 unsigned long tx_window_errors;
152
153 /* for cslip etc */
154 unsigned long rx_compressed;
155 unsigned long tx_compressed;
156};
157
158
159/* Media selection options. */
160enum {
161 IF_PORT_UNKNOWN = 0,
162 IF_PORT_10BASE2,
163 IF_PORT_10BASET,
164 IF_PORT_AUI,
165 IF_PORT_100BASET,
166 IF_PORT_100BASETX,
167 IF_PORT_100BASEFX
168};
169
170#ifdef __KERNEL__
171
172#include <linux/cache.h>
173#include <linux/skbuff.h>
174
175struct neighbour;
176struct neigh_parms;
177struct sk_buff;
178
179struct netif_rx_stats
180{
181 unsigned total;
182 unsigned dropped;
183 unsigned time_squeeze;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 unsigned cpu_collision;
185};
186
187DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
188
Patrick McHardybf742482007-06-27 01:26:19 -0700189struct dev_addr_list
190{
191 struct dev_addr_list *next;
192 u8 da_addr[MAX_ADDR_LEN];
193 u8 da_addrlen;
Patrick McHardya0a400d2007-07-14 18:52:02 -0700194 u8 da_synced;
Patrick McHardybf742482007-06-27 01:26:19 -0700195 int da_users;
196 int da_gusers;
197};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
199/*
200 * We tag multicasts with these structures.
201 */
Patrick McHardy3fba5a82007-06-27 01:26:58 -0700202
203#define dev_mc_list dev_addr_list
204#define dmi_addr da_addr
205#define dmi_addrlen da_addrlen
206#define dmi_users da_users
207#define dmi_gusers da_gusers
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
209struct hh_cache
210{
211 struct hh_cache *hh_next; /* Next entry */
212 atomic_t hh_refcnt; /* number of users */
Eric Dumazetf0490982006-12-08 00:08:43 -0800213/*
214 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
215 * cache line on SMP.
216 * They are mostly read, but hh_refcnt may be changed quite frequently,
217 * incurring cache line ping pongs.
218 */
219 __be16 hh_type ____cacheline_aligned_in_smp;
220 /* protocol identifier, f.e ETH_P_IP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 * NOTE: For VLANs, this will be the
222 * encapuslated type. --BLG
223 */
Arnaldo Carvalho de Melod5c42c02006-11-27 17:58:02 -0200224 u16 hh_len; /* length of header */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 int (*hh_output)(struct sk_buff *skb);
Stephen Hemminger3644f0c2006-12-07 15:08:17 -0800226 seqlock_t hh_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
228 /* cached hardware header; allow for machine alignment needs. */
229#define HH_DATA_MOD 16
230#define HH_DATA_OFF(__len) \
Jiri Benc5ba0eac2005-06-02 16:48:05 -0700231 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232#define HH_DATA_ALIGN(__len) \
233 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
234 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
235};
236
237/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
238 * Alternative is:
239 * dev->hard_header_len ? (dev->hard_header_len +
240 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
241 *
242 * We could use other alignment values, but we must maintain the
243 * relationship HH alignment <= LL alignment.
Johannes Bergf5184d22008-05-12 20:48:31 -0700244 *
245 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
246 * may need.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 */
248#define LL_RESERVED_SPACE(dev) \
Johannes Bergf5184d22008-05-12 20:48:31 -0700249 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
Johannes Bergf5184d22008-05-12 20:48:31 -0700251 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
252#define LL_ALLOCATED_SPACE(dev) \
253 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700255struct header_ops {
256 int (*create) (struct sk_buff *skb, struct net_device *dev,
257 unsigned short type, const void *daddr,
258 const void *saddr, unsigned len);
259 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
260 int (*rebuild)(struct sk_buff *skb);
261#define HAVE_HEADER_CACHE
262 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
263 void (*cache_update)(struct hh_cache *hh,
264 const struct net_device *dev,
265 const unsigned char *haddr);
266};
267
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268/* These flag bits are private to the generic network queueing
269 * layer, they may not be explicitly referenced by any other
270 * code.
271 */
272
273enum netdev_state_t
274{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 __LINK_STATE_START,
276 __LINK_STATE_PRESENT,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 __LINK_STATE_NOCARRIER,
Stefan Rompfb00055a2006-03-20 17:09:11 -0800278 __LINK_STATE_LINKWATCH_PENDING,
279 __LINK_STATE_DORMANT,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280};
281
282
283/*
284 * This structure holds at boot time configured netdevice settings. They
285 * are then used in the device probing.
286 */
287struct netdev_boot_setup {
288 char name[IFNAMSIZ];
289 struct ifmap map;
290};
291#define NETDEV_BOOT_SETUP_MAX 8
292
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300293extern int __init netdev_boot_setup(char *str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
295/*
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700296 * Structure for NAPI scheduling similar to tasklet but with weighting
297 */
298struct napi_struct {
299 /* The poll_list must only be managed by the entity which
300 * changes the state of the NAPI_STATE_SCHED bit. This means
301 * whoever atomically sets that bit can add this napi_struct
302 * to the per-cpu poll_list, and whoever clears that bit
303 * can remove from the list right before clearing the bit.
304 */
305 struct list_head poll_list;
306
307 unsigned long state;
308 int weight;
309 int (*poll)(struct napi_struct *, int);
310#ifdef CONFIG_NETPOLL
311 spinlock_t poll_lock;
312 int poll_owner;
313 struct net_device *dev;
314 struct list_head dev_list;
315#endif
316};
317
318enum
319{
320 NAPI_STATE_SCHED, /* Poll is scheduled */
David S. Millera0a46192008-01-07 20:35:07 -0800321 NAPI_STATE_DISABLE, /* Disable pending */
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700322};
323
Harvey Harrisonb3c97522008-02-13 15:03:15 -0800324extern void __napi_schedule(struct napi_struct *n);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700325
David S. Millera0a46192008-01-07 20:35:07 -0800326static inline int napi_disable_pending(struct napi_struct *n)
327{
328 return test_bit(NAPI_STATE_DISABLE, &n->state);
329}
330
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700331/**
332 * napi_schedule_prep - check if napi can be scheduled
333 * @n: napi context
334 *
335 * Test if NAPI routine is already running, and if not mark
336 * it as running. This is used as a condition variable
David S. Millera0a46192008-01-07 20:35:07 -0800337 * insure only one NAPI poll instance runs. We also make
338 * sure there is no pending NAPI disable.
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700339 */
340static inline int napi_schedule_prep(struct napi_struct *n)
341{
David S. Millera0a46192008-01-07 20:35:07 -0800342 return !napi_disable_pending(n) &&
343 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700344}
345
346/**
347 * napi_schedule - schedule NAPI poll
348 * @n: napi context
349 *
350 * Schedule NAPI poll routine to be called if it is not already
351 * running.
352 */
353static inline void napi_schedule(struct napi_struct *n)
354{
355 if (napi_schedule_prep(n))
356 __napi_schedule(n);
357}
358
Roland Dreierbfe13f52007-10-09 15:47:37 -0700359/* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
360static inline int napi_reschedule(struct napi_struct *napi)
361{
362 if (napi_schedule_prep(napi)) {
363 __napi_schedule(napi);
364 return 1;
365 }
366 return 0;
367}
368
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700369/**
370 * napi_complete - NAPI processing complete
371 * @n: napi context
372 *
373 * Mark NAPI processing as complete.
374 */
375static inline void __napi_complete(struct napi_struct *n)
376{
377 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
378 list_del(&n->poll_list);
379 smp_mb__before_clear_bit();
380 clear_bit(NAPI_STATE_SCHED, &n->state);
381}
382
383static inline void napi_complete(struct napi_struct *n)
384{
David S. Miller50fd4402008-03-27 17:42:50 -0700385 unsigned long flags;
386
387 local_irq_save(flags);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700388 __napi_complete(n);
David S. Miller50fd4402008-03-27 17:42:50 -0700389 local_irq_restore(flags);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700390}
391
392/**
393 * napi_disable - prevent NAPI from scheduling
394 * @n: napi context
395 *
396 * Stop NAPI from being scheduled on this context.
397 * Waits till any outstanding processing completes.
398 */
399static inline void napi_disable(struct napi_struct *n)
400{
David S. Millera0a46192008-01-07 20:35:07 -0800401 set_bit(NAPI_STATE_DISABLE, &n->state);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700402 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
Benjamin Herrenschmidt43cc7382007-10-26 04:23:22 -0700403 msleep(1);
David S. Millera0a46192008-01-07 20:35:07 -0800404 clear_bit(NAPI_STATE_DISABLE, &n->state);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700405}
406
407/**
408 * napi_enable - enable NAPI scheduling
409 * @n: napi context
410 *
411 * Resume NAPI from being scheduled on this context.
412 * Must be paired with napi_disable.
413 */
414static inline void napi_enable(struct napi_struct *n)
415{
416 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
417 smp_mb__before_clear_bit();
418 clear_bit(NAPI_STATE_SCHED, &n->state);
419}
420
Stephen Hemmingerc264c3d2007-10-17 13:26:41 -0700421#ifdef CONFIG_SMP
422/**
423 * napi_synchronize - wait until NAPI is not running
424 * @n: napi context
425 *
426 * Wait until NAPI is done being scheduled on this context.
427 * Waits till any outstanding processing completes but
428 * does not disable future activations.
429 */
430static inline void napi_synchronize(const struct napi_struct *n)
431{
432 while (test_bit(NAPI_STATE_SCHED, &n->state))
433 msleep(1);
434}
435#else
436# define napi_synchronize(n) barrier()
437#endif
438
David S. Miller79d16382008-07-08 23:14:46 -0700439enum netdev_queue_state_t
440{
441 __QUEUE_STATE_XOFF,
David S. Millerc3f26a22008-07-31 16:58:50 -0700442 __QUEUE_STATE_FROZEN,
David S. Miller79d16382008-07-08 23:14:46 -0700443};
444
David S. Millerbb949fb2008-07-08 16:55:56 -0700445struct netdev_queue {
446 struct net_device *dev;
David S. Millerb0e1e642008-07-08 17:42:10 -0700447 struct Qdisc *qdisc;
David S. Miller79d16382008-07-08 23:14:46 -0700448 unsigned long state;
David S. Millerc773e842008-07-08 23:13:53 -0700449 spinlock_t _xmit_lock;
450 int xmit_lock_owner;
David S. Millerb0e1e642008-07-08 17:42:10 -0700451 struct Qdisc *qdisc_sleeping;
David S. Millere8a04642008-07-17 00:34:19 -0700452} ____cacheline_aligned_in_smp;
David S. Millerbb949fb2008-07-08 16:55:56 -0700453
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700454/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 * The DEVICE structure.
456 * Actually, this whole structure is a big mistake. It mixes I/O
457 * data with strictly "high-level" data, and it has to know about
458 * almost every data structure used in the INET module.
459 *
460 * FIXME: cleanup struct net_device such that network protocol info
461 * moves out.
462 */
463
464struct net_device
465{
466
467 /*
468 * This is the first field of the "visible" part of this structure
469 * (i.e. as seen by users in the "Space.c" file). It is the name
470 * the interface.
471 */
472 char name[IFNAMSIZ];
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700473 /* device name hash chain */
474 struct hlist_node name_hlist;
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700475 /* snmp alias */
476 char *ifalias;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
478 /*
479 * I/O specific fields
480 * FIXME: Merge these and struct ifmap into one
481 */
482 unsigned long mem_end; /* shared mem end */
483 unsigned long mem_start; /* shared mem start */
484 unsigned long base_addr; /* device I/O address */
485 unsigned int irq; /* device IRQ number */
486
487 /*
488 * Some hardware also needs these fields, but they are not
489 * part of the usual set specified in Space.c.
490 */
491
492 unsigned char if_port; /* Selectable AUI, TP,..*/
493 unsigned char dma; /* DMA channel */
494
495 unsigned long state;
496
Pavel Emelianov7562f872007-05-03 15:13:45 -0700497 struct list_head dev_list;
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700498#ifdef CONFIG_NETPOLL
499 struct list_head napi_list;
500#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501
502 /* The device initialization function. Called only once. */
503 int (*init)(struct net_device *dev);
504
505 /* ------- Fields preinitialized in Space.c finish here ------- */
506
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700507 /* Net device features */
508 unsigned long features;
509#define NETIF_F_SG 1 /* Scatter/gather IO. */
Stephen Hemmingerd212f872007-06-27 00:47:37 -0700510#define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700511#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
512#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
Stephen Hemmingerd212f872007-06-27 00:47:37 -0700513#define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700514#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
515#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
516#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
517#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
518#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
519#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
Herbert Xu37c31852006-06-22 03:07:29 -0700520#define NETIF_F_GSO 2048 /* Enable software GSO. */
Christian Borntraegere24eb522007-09-25 19:42:02 -0700521#define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
522 /* do not use LLTX in new drivers */
Eric W. Biedermance286d32007-09-12 13:53:49 +0200523#define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -0700524#define NETIF_F_LRO 32768 /* large receive offload */
Herbert Xu79671682006-06-22 02:40:14 -0700525
526 /* Segmentation offload features */
Patrick McHardy289c79a2008-05-23 00:22:04 -0700527#define NETIF_F_GSO_SHIFT 16
528#define NETIF_F_GSO_MASK 0xffff0000
Herbert Xu79671682006-06-22 02:40:14 -0700529#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
Herbert Xuf83ef8c2006-06-30 13:37:03 -0700530#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
Herbert Xu576a30e2006-06-27 13:22:38 -0700531#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
Herbert Xuf83ef8c2006-06-30 13:37:03 -0700532#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
533#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700534
Herbert Xu78eb8872006-08-17 18:22:32 -0700535 /* List of features with software fallbacks. */
536#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
537
Stephen Hemmingerd212f872007-06-27 00:47:37 -0700538
Herbert Xu8648b302006-06-17 22:06:05 -0700539#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
Stephen Hemmingerd212f872007-06-27 00:47:37 -0700540#define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
541#define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
542#define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
Herbert Xu8648b302006-06-17 22:06:05 -0700543
Herbert Xub63365a2008-10-23 01:11:29 -0700544 /*
545 * If one device supports one of these features, then enable them
546 * for all in netdev_increment_features.
547 */
548#define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
549 NETIF_F_SG | NETIF_F_HIGHDMA | \
550 NETIF_F_FRAGLIST)
551
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 /* Interface index. Unique device identifier */
553 int ifindex;
554 int iflink;
555
556
557 struct net_device_stats* (*get_stats)(struct net_device *dev);
Rusty Russellc45d2862007-03-28 14:29:08 -0700558 struct net_device_stats stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
Johannes Bergb86e0282007-04-26 20:48:23 -0700560#ifdef CONFIG_WIRELESS_EXT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 /* List of functions to handle Wireless Extensions (instead of ioctl).
562 * See <net/iw_handler.h> for details. Jean II */
563 const struct iw_handler_def * wireless_handlers;
564 /* Instance data managed by the core of Wireless Extensions. */
565 struct iw_public_data * wireless_data;
Johannes Bergb86e0282007-04-26 20:48:23 -0700566#endif
Stephen Hemminger76fd8592006-09-08 11:16:13 -0700567 const struct ethtool_ops *ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700569 /* Hardware header description */
570 const struct header_ops *header_ops;
571
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 /*
573 * This marks the end of the "visible" part of the structure. All
574 * fields hereafter are internal to the system, and may change at
575 * will (read: may be cleaned up at will).
576 */
577
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Stefan Rompfb00055a2006-03-20 17:09:11 -0800579 unsigned int flags; /* interface flags (a la BSD) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 unsigned short gflags;
581 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
582 unsigned short padded; /* How much padding added by alloc_netdev() */
583
Stefan Rompfb00055a2006-03-20 17:09:11 -0800584 unsigned char operstate; /* RFC2863 operstate */
585 unsigned char link_mode; /* mapping policy to operstate */
586
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 unsigned mtu; /* interface MTU value */
588 unsigned short type; /* interface hardware type */
589 unsigned short hard_header_len; /* hardware hdr length */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590
Johannes Bergf5184d22008-05-12 20:48:31 -0700591 /* extra head- and tailroom the hardware may need, but not in all cases
592 * can this be guaranteed, especially tailroom. Some cases also use
593 * LL_MAX_HEADER instead to allocate the skb.
594 */
595 unsigned short needed_headroom;
596 unsigned short needed_tailroom;
597
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 struct net_device *master; /* Pointer to master device of a group,
599 * which this device is member of.
600 */
601
602 /* Interface address info. */
Jon Wetzela6f9a702005-08-20 17:15:54 -0700603 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 unsigned char addr_len; /* hardware address length */
605 unsigned short dev_id; /* for shared network cards */
606
David S. Millerf1f28aa2008-07-15 00:08:33 -0700607 spinlock_t addr_list_lock;
Patrick McHardy4417da62007-06-27 01:28:10 -0700608 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
609 int uc_count; /* Number of installed ucasts */
610 int uc_promisc;
Patrick McHardy3fba5a82007-06-27 01:26:58 -0700611 struct dev_addr_list *mc_list; /* Multicast mac addresses */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 int mc_count; /* Number of installed mcasts */
Wang Chen9d45abe2008-06-17 21:12:48 -0700613 unsigned int promiscuity;
614 unsigned int allmulti;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616
617 /* Protocol specific pointers */
618
Lennert Buytenhek91da11f2008-10-07 13:44:02 +0000619#ifdef CONFIG_NET_DSA
620 void *dsa_ptr; /* dsa specific data */
621#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 void *atalk_ptr; /* AppleTalk link */
623 void *ip_ptr; /* IPv4 specific data */
624 void *dn_ptr; /* DECnet specific data */
625 void *ip6_ptr; /* IPv6 specific data */
626 void *ec_ptr; /* Econet specific data */
627 void *ax25_ptr; /* AX.25 specific data */
Johannes Berg704232c2007-04-23 12:20:05 -0700628 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
629 assign before registering */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700631/*
632 * Cache line mostly used on receive path (including eth_type_trans())
633 */
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700634 unsigned long last_rx; /* Time of last Rx */
635 /* Interface address info used in eth_type_trans() */
636 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
637 because most packets are unicast) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700639 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
640
David S. Millerbb949fb2008-07-08 16:55:56 -0700641 struct netdev_queue rx_queue;
David S. Millere8a04642008-07-17 00:34:19 -0700642
643 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
David S. Millerfd2ea0a2008-07-17 01:56:23 -0700644
645 /* Number of TX queues allocated at alloc_netdev_mq() time */
David S. Millere8a04642008-07-17 00:34:19 -0700646 unsigned int num_tx_queues;
David S. Millerfd2ea0a2008-07-17 01:56:23 -0700647
648 /* Number of TX queues currently active in device */
649 unsigned int real_num_tx_queues;
650
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 unsigned long tx_queue_len; /* Max frames per queue allowed */
David S. Millerc3f26a22008-07-31 16:58:50 -0700652 spinlock_t tx_global_lock;
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700653/*
654 * One part is mostly used on xmit path (device)
655 */
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700656 void *priv; /* pointer to private data */
657 int (*hard_start_xmit) (struct sk_buff *skb,
658 struct net_device *dev);
659 /* These may be needed for future network-power-down code. */
660 unsigned long trans_start; /* Time (in jiffies) of last Tx */
661
662 int watchdog_timeo; /* used by dev_watchdog() */
663 struct timer_list watchdog_timer;
664
665/*
666 * refcnt is a very hot point, so align it on SMP
667 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 /* Number of references to this device */
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700669 atomic_t refcnt ____cacheline_aligned_in_smp;
670
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 /* delayed register/unregister */
672 struct list_head todo_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 /* device index hash chain */
674 struct hlist_node index_hlist;
675
Herbert Xu572a1032007-05-08 18:34:17 -0700676 struct net_device *link_watch_next;
677
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 /* register/unregister state machine */
679 enum { NETREG_UNINITIALIZED=0,
Stephen Hemmingerb17a7c12006-05-10 13:21:17 -0700680 NETREG_REGISTERED, /* completed register_netdevice */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 NETREG_UNREGISTERING, /* called unregister_netdevice */
682 NETREG_UNREGISTERED, /* completed unregister todo */
683 NETREG_RELEASED, /* called free_netdev */
684 } reg_state;
685
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686 /* Called after device is detached from network. */
687 void (*uninit)(struct net_device *dev);
688 /* Called after last user reference disappears. */
689 void (*destructor)(struct net_device *dev);
690
691 /* Pointers to interface service routines. */
692 int (*open)(struct net_device *dev);
693 int (*stop)(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694#define HAVE_NETDEV_POLL
Patrick McHardy24023452007-07-14 18:51:31 -0700695#define HAVE_CHANGE_RX_FLAGS
696 void (*change_rx_flags)(struct net_device *dev,
697 int flags);
Patrick McHardy4417da62007-06-27 01:28:10 -0700698#define HAVE_SET_RX_MODE
699 void (*set_rx_mode)(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700#define HAVE_MULTICAST
701 void (*set_multicast_list)(struct net_device *dev);
702#define HAVE_SET_MAC_ADDR
703 int (*set_mac_address)(struct net_device *dev,
704 void *addr);
Jeff Garzikbada3392007-10-23 20:19:37 -0700705#define HAVE_VALIDATE_ADDR
706 int (*validate_addr)(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707#define HAVE_PRIVATE_IOCTL
708 int (*do_ioctl)(struct net_device *dev,
709 struct ifreq *ifr, int cmd);
710#define HAVE_SET_CONFIG
711 int (*set_config)(struct net_device *dev,
712 struct ifmap *map);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713#define HAVE_CHANGE_MTU
714 int (*change_mtu)(struct net_device *dev, int new_mtu);
715
716#define HAVE_TX_TIMEOUT
717 void (*tx_timeout) (struct net_device *dev);
718
719 void (*vlan_rx_register)(struct net_device *dev,
720 struct vlan_group *grp);
721 void (*vlan_rx_add_vid)(struct net_device *dev,
722 unsigned short vid);
723 void (*vlan_rx_kill_vid)(struct net_device *dev,
724 unsigned short vid);
725
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
727#ifdef CONFIG_NETPOLL
Jeff Moyer115c1d62005-06-22 22:05:31 -0700728 struct netpoll_info *npinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729#endif
730#ifdef CONFIG_NET_POLL_CONTROLLER
731 void (*poll_controller)(struct net_device *dev);
732#endif
733
David S. Millereae792b2008-07-15 03:03:33 -0700734 u16 (*select_queue)(struct net_device *dev,
735 struct sk_buff *skb);
736
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900737#ifdef CONFIG_NET_NS
Eric W. Biederman4a1c5372007-09-12 11:56:32 +0200738 /* Network namespace this network device is inside */
739 struct net *nd_net;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900740#endif
Eric W. Biederman4a1c5372007-09-12 11:56:32 +0200741
David S. Miller49517042008-05-12 03:29:11 -0700742 /* mid-layer private */
743 void *ml_priv;
744
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 /* bridge stuff */
746 struct net_bridge_port *br_port;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700747 /* macvlan */
748 struct macvlan_port *macvlan_port;
Patrick McHardyeca9eba2008-07-05 21:26:13 -0700749 /* GARP */
750 struct garp_port *garp_port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 /* class/net/name entry */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700753 struct device dev;
Stephen Hemmingerfe9925b2006-05-06 17:56:03 -0700754 /* space for optional statistics and wireless sysfs groups */
755 struct attribute_group *sysfs_groups[3];
Patrick McHardy38f7b872007-06-13 12:03:51 -0700756
757 /* rtnetlink link ops */
758 const struct rtnl_link_ops *rtnl_link_ops;
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -0700759
Patrick McHardy289c79a2008-05-23 00:22:04 -0700760 /* VLAN feature mask */
761 unsigned long vlan_features;
762
Peter P Waskiewicz Jr82cc1a72008-03-21 03:43:19 -0700763 /* for setting kernel sock attribute on TCP connection setup */
764#define GSO_MAX_SIZE 65536
765 unsigned int gso_max_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766};
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700767#define to_net_dev(d) container_of(d, struct net_device, dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768
769#define NETDEV_ALIGN 32
770#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
771
David S. Millere8a04642008-07-17 00:34:19 -0700772static inline
773struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
774 unsigned int index)
775{
776 return &dev->_tx[index];
777}
778
779static inline void netdev_for_each_tx_queue(struct net_device *dev,
780 void (*f)(struct net_device *,
781 struct netdev_queue *,
782 void *),
783 void *arg)
784{
785 unsigned int i;
786
787 for (i = 0; i < dev->num_tx_queues; i++)
788 f(dev, &dev->_tx[i], arg);
789}
790
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900791/*
792 * Net namespace inlines
793 */
794static inline
795struct net *dev_net(const struct net_device *dev)
796{
797#ifdef CONFIG_NET_NS
798 return dev->nd_net;
799#else
800 return &init_net;
801#endif
802}
803
804static inline
Denis V. Lunevf5aa23f2008-03-26 00:48:17 -0700805void dev_net_set(struct net_device *dev, struct net *net)
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900806{
807#ifdef CONFIG_NET_NS
Denis V. Lunevf3005d72008-04-16 02:02:18 -0700808 release_net(dev->nd_net);
809 dev->nd_net = hold_net(net);
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900810#endif
811}
812
Lennert Buytenhekcf85d082008-10-07 13:45:02 +0000813static inline bool netdev_uses_dsa_tags(struct net_device *dev)
814{
815#ifdef CONFIG_NET_DSA_TAG_DSA
816 if (dev->dsa_ptr != NULL)
817 return dsa_uses_dsa_tags(dev->dsa_ptr);
818#endif
819
820 return 0;
821}
822
Lennert Buytenhek396138f02008-10-07 13:46:07 +0000823static inline bool netdev_uses_trailer_tags(struct net_device *dev)
824{
825#ifdef CONFIG_NET_DSA_TAG_TRAILER
826 if (dev->dsa_ptr != NULL)
827 return dsa_uses_trailer_tags(dev->dsa_ptr);
828#endif
829
830 return 0;
831}
832
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700833/**
834 * netdev_priv - access network device private data
835 * @dev: network device
836 *
837 * Get network device private data
838 */
Patrick McHardy6472ce62007-06-13 12:03:21 -0700839static inline void *netdev_priv(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840{
David S. Millere3c50d52008-07-15 02:58:39 -0700841 return (char *)dev + ((sizeof(struct net_device)
842 + NETDEV_ALIGN_CONST)
843 & ~NETDEV_ALIGN_CONST);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844}
845
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846/* Set the sysfs physical device reference for the network logical device
847 * if set prior to registration will cause a symlink during initialization.
848 */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700849#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
Stephen Hemminger3b582cc2007-11-01 02:21:47 -0700851/**
852 * netif_napi_add - initialize a napi context
853 * @dev: network device
854 * @napi: napi context
855 * @poll: polling function
856 * @weight: default weight
857 *
858 * netif_napi_add() must be used to initialize a napi context prior to calling
859 * *any* of the other napi related functions.
860 */
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700861static inline void netif_napi_add(struct net_device *dev,
862 struct napi_struct *napi,
863 int (*poll)(struct napi_struct *, int),
864 int weight)
865{
866 INIT_LIST_HEAD(&napi->poll_list);
867 napi->poll = poll;
868 napi->weight = weight;
869#ifdef CONFIG_NETPOLL
870 napi->dev = dev;
871 list_add(&napi->dev_list, &dev->napi_list);
872 spin_lock_init(&napi->poll_lock);
873 napi->poll_owner = -1;
874#endif
875 set_bit(NAPI_STATE_SCHED, &napi->state);
876}
877
Alexander Duyckd8156532008-07-08 15:13:05 -0700878/**
879 * netif_napi_del - remove a napi context
880 * @napi: napi context
881 *
882 * netif_napi_del() removes a napi context from the network device napi list
883 */
884static inline void netif_napi_del(struct napi_struct *napi)
885{
886#ifdef CONFIG_NETPOLL
887 list_del(&napi->dev_list);
888#endif
889}
890
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891struct packet_type {
David S. Millerf2ccd8f2005-08-09 19:34:12 -0700892 __be16 type; /* This is really htons(ether_type). */
893 struct net_device *dev; /* NULL is wildcarded here */
894 int (*func) (struct sk_buff *,
895 struct net_device *,
896 struct packet_type *,
897 struct net_device *);
Herbert Xu576a30e2006-06-27 13:22:38 -0700898 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
899 int features);
Herbert Xua430a432006-07-08 13:34:56 -0700900 int (*gso_send_check)(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 void *af_packet_priv;
902 struct list_head list;
903};
904
905#include <linux/interrupt.h>
906#include <linux/notifier.h>
907
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908extern rwlock_t dev_base_lock; /* Device list lock */
909
Eric W. Biederman881d9662007-09-17 11:56:21 -0700910
911#define for_each_netdev(net, d) \
912 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
913#define for_each_netdev_safe(net, d, n) \
914 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
915#define for_each_netdev_continue(net, d) \
916 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
Pavel Emelianov7562f872007-05-03 15:13:45 -0700917#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
918
Daniel Lezcanoa050c332007-09-12 14:57:09 +0200919static inline struct net_device *next_net_device(struct net_device *dev)
920{
921 struct list_head *lh;
922 struct net *net;
Pavel Emelianov7562f872007-05-03 15:13:45 -0700923
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900924 net = dev_net(dev);
Daniel Lezcanoa050c332007-09-12 14:57:09 +0200925 lh = dev->dev_list.next;
926 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
927}
928
929static inline struct net_device *first_net_device(struct net *net)
930{
931 return list_empty(&net->dev_base_head) ? NULL :
932 net_device_entry(net->dev_base_head.next);
933}
Pavel Emelianov7562f872007-05-03 15:13:45 -0700934
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935extern int netdev_boot_setup_check(struct net_device *dev);
936extern unsigned long netdev_boot_base(const char *prefix, int unit);
Eric W. Biederman881d9662007-09-17 11:56:21 -0700937extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
938extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
939extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940extern void dev_add_pack(struct packet_type *pt);
941extern void dev_remove_pack(struct packet_type *pt);
942extern void __dev_remove_pack(struct packet_type *pt);
943
Eric W. Biederman881d9662007-09-17 11:56:21 -0700944extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 unsigned short mask);
Eric W. Biederman881d9662007-09-17 11:56:21 -0700946extern struct net_device *dev_get_by_name(struct net *net, const char *name);
947extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948extern int dev_alloc_name(struct net_device *dev, const char *name);
949extern int dev_open(struct net_device *dev);
950extern int dev_close(struct net_device *dev);
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700951extern void dev_disable_lro(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952extern int dev_queue_xmit(struct sk_buff *skb);
953extern int register_netdevice(struct net_device *dev);
Stephen Hemminger22f8cde2007-02-07 00:09:58 -0800954extern void unregister_netdevice(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955extern void free_netdev(struct net_device *dev);
956extern void synchronize_net(void);
957extern int register_netdevice_notifier(struct notifier_block *nb);
958extern int unregister_netdevice_notifier(struct notifier_block *nb);
Eric W. Biedermanad7379d2007-09-16 15:33:32 -0700959extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
Eric W. Biederman881d9662007-09-17 11:56:21 -0700960extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
961extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962extern int dev_restart(struct net_device *dev);
963#ifdef CONFIG_NETPOLL_TRAP
964extern int netpoll_trap(void);
965#endif
966
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700967static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
968 unsigned short type,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700969 const void *daddr, const void *saddr,
970 unsigned len)
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700971{
Ursula Braunf1ecfd52007-10-22 16:16:14 +0200972 if (!dev->header_ops || !dev->header_ops->create)
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700973 return 0;
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700974
975 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700976}
977
Stephen Hemmingerb95cce32007-09-26 22:13:38 -0700978static inline int dev_parse_header(const struct sk_buff *skb,
979 unsigned char *haddr)
980{
981 const struct net_device *dev = skb->dev;
982
Patrick McHardy1b833362007-10-18 05:09:28 -0700983 if (!dev->header_ops || !dev->header_ops->parse)
Stephen Hemmingerb95cce32007-09-26 22:13:38 -0700984 return 0;
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700985 return dev->header_ops->parse(skb, haddr);
Stephen Hemmingerb95cce32007-09-26 22:13:38 -0700986}
987
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
989extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
990static inline int unregister_gifconf(unsigned int family)
991{
992 return register_gifconf(family, NULL);
993}
994
995/*
996 * Incoming packets are placed on per-cpu queues so that
997 * no locking is needed.
998 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999struct softnet_data
1000{
David S. Miller37437bb2008-07-16 02:15:04 -07001001 struct Qdisc *output_queue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002 struct sk_buff_head input_pkt_queue;
1003 struct list_head poll_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 struct sk_buff *completion_queue;
1005
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001006 struct napi_struct backlog;
Chris Leechdb217332006-06-17 21:24:58 -07001007#ifdef CONFIG_NET_DMA
1008 struct dma_chan *net_dma;
1009#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010};
1011
1012DECLARE_PER_CPU(struct softnet_data,softnet_data);
1013
1014#define HAVE_NETIF_QUEUE
1015
David S. Miller37437bb2008-07-16 02:15:04 -07001016extern void __netif_schedule(struct Qdisc *q);
David S. Miller86d804e2008-07-08 23:11:25 -07001017
1018static inline void netif_schedule_queue(struct netdev_queue *txq)
1019{
David S. Miller79d16382008-07-08 23:14:46 -07001020 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
David S. Miller37437bb2008-07-16 02:15:04 -07001021 __netif_schedule(txq->qdisc);
David S. Miller86d804e2008-07-08 23:11:25 -07001022}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001024static inline void netif_tx_schedule_all(struct net_device *dev)
1025{
1026 unsigned int i;
1027
1028 for (i = 0; i < dev->num_tx_queues; i++)
1029 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1030}
1031
Dave Jonesd29f7492008-07-22 14:09:06 -07001032static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1033{
1034 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1035}
1036
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001037/**
1038 * netif_start_queue - allow transmit
1039 * @dev: network device
1040 *
1041 * Allow upper layers to call the device hard_start_xmit routine.
1042 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043static inline void netif_start_queue(struct net_device *dev)
1044{
David S. Millere8a04642008-07-17 00:34:19 -07001045 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046}
1047
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001048static inline void netif_tx_start_all_queues(struct net_device *dev)
1049{
1050 unsigned int i;
1051
1052 for (i = 0; i < dev->num_tx_queues; i++) {
1053 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1054 netif_tx_start_queue(txq);
1055 }
1056}
1057
David S. Miller79d16382008-07-08 23:14:46 -07001058static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059{
1060#ifdef CONFIG_NETPOLL_TRAP
Sergei Shtylyov5f286e12007-04-28 20:57:37 -07001061 if (netpoll_trap()) {
David S. Miller79d16382008-07-08 23:14:46 -07001062 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 return;
Sergei Shtylyov5f286e12007-04-28 20:57:37 -07001064 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065#endif
David S. Miller79d16382008-07-08 23:14:46 -07001066 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
David S. Miller37437bb2008-07-16 02:15:04 -07001067 __netif_schedule(dev_queue->qdisc);
David S. Miller79d16382008-07-08 23:14:46 -07001068}
1069
Dave Jonesd29f7492008-07-22 14:09:06 -07001070/**
1071 * netif_wake_queue - restart transmit
1072 * @dev: network device
1073 *
1074 * Allow upper layers to call the device hard_start_xmit routine.
1075 * Used for flow control when transmit resources are available.
1076 */
David S. Miller79d16382008-07-08 23:14:46 -07001077static inline void netif_wake_queue(struct net_device *dev)
1078{
David S. Millere8a04642008-07-17 00:34:19 -07001079 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080}
1081
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001082static inline void netif_tx_wake_all_queues(struct net_device *dev)
1083{
1084 unsigned int i;
1085
1086 for (i = 0; i < dev->num_tx_queues; i++) {
1087 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1088 netif_tx_wake_queue(txq);
1089 }
1090}
1091
Dave Jonesd29f7492008-07-22 14:09:06 -07001092static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1093{
1094 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1095}
1096
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001097/**
1098 * netif_stop_queue - stop transmitted packets
1099 * @dev: network device
1100 *
1101 * Stop upper layers calling the device hard_start_xmit routine.
1102 * Used for flow control when transmit resources are unavailable.
1103 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104static inline void netif_stop_queue(struct net_device *dev)
1105{
David S. Millere8a04642008-07-17 00:34:19 -07001106 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107}
1108
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001109static inline void netif_tx_stop_all_queues(struct net_device *dev)
1110{
1111 unsigned int i;
1112
1113 for (i = 0; i < dev->num_tx_queues; i++) {
1114 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1115 netif_tx_stop_queue(txq);
1116 }
1117}
1118
Dave Jonesd29f7492008-07-22 14:09:06 -07001119static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1120{
1121 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1122}
1123
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001124/**
1125 * netif_queue_stopped - test if transmit queue is flowblocked
1126 * @dev: network device
1127 *
1128 * Test if transmit queue on device is currently unable to send.
1129 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130static inline int netif_queue_stopped(const struct net_device *dev)
1131{
David S. Millere8a04642008-07-17 00:34:19 -07001132 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133}
1134
David S. Millerc3f26a22008-07-31 16:58:50 -07001135static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1136{
1137 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1138}
1139
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001140/**
1141 * netif_running - test if up
1142 * @dev: network device
1143 *
1144 * Test if the device has been brought up.
1145 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146static inline int netif_running(const struct net_device *dev)
1147{
1148 return test_bit(__LINK_STATE_START, &dev->state);
1149}
1150
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001151/*
1152 * Routines to manage the subqueues on a device. We only need start
1153 * stop, and a check if it's stopped. All other device management is
1154 * done at the overall netdevice level.
1155 * Also test the device if we're multiqueue.
1156 */
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001157
1158/**
1159 * netif_start_subqueue - allow sending packets on subqueue
1160 * @dev: network device
1161 * @queue_index: sub queue index
1162 *
1163 * Start individual transmit queue of a device with multiple transmit queues.
1164 */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001165static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1166{
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001167 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1168 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001169}
1170
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001171/**
1172 * netif_stop_subqueue - stop sending packets on subqueue
1173 * @dev: network device
1174 * @queue_index: sub queue index
1175 *
1176 * Stop individual transmit queue of a device with multiple transmit queues.
1177 */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001178static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1179{
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001180 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001181#ifdef CONFIG_NETPOLL_TRAP
1182 if (netpoll_trap())
1183 return;
1184#endif
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001185 set_bit(__QUEUE_STATE_XOFF, &txq->state);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001186}
1187
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001188/**
1189 * netif_subqueue_stopped - test status of subqueue
1190 * @dev: network device
1191 * @queue_index: sub queue index
1192 *
1193 * Check individual transmit queue of a device with multiple transmit queues.
1194 */
Pavel Emelyanov668f8952007-10-21 17:01:56 -07001195static inline int __netif_subqueue_stopped(const struct net_device *dev,
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001196 u16 queue_index)
1197{
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001198 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1199 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001200}
1201
Pavel Emelyanov668f8952007-10-21 17:01:56 -07001202static inline int netif_subqueue_stopped(const struct net_device *dev,
1203 struct sk_buff *skb)
1204{
1205 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1206}
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001207
1208/**
1209 * netif_wake_subqueue - allow sending packets on subqueue
1210 * @dev: network device
1211 * @queue_index: sub queue index
1212 *
1213 * Resume individual transmit queue of a device with multiple transmit queues.
1214 */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001215static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1216{
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001217 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001218#ifdef CONFIG_NETPOLL_TRAP
1219 if (netpoll_trap())
1220 return;
1221#endif
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001222 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
David S. Miller37437bb2008-07-16 02:15:04 -07001223 __netif_schedule(txq->qdisc);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001224}
1225
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001226/**
1227 * netif_is_multiqueue - test if device has multiple transmit queues
1228 * @dev: network device
1229 *
1230 * Check if device has multiple transmit queues
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001231 */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001232static inline int netif_is_multiqueue(const struct net_device *dev)
1233{
David S. Miller09e83b52008-07-17 01:52:12 -07001234 return (dev->num_tx_queues > 1);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001235}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236
1237/* Use this variant when it is known for sure that it
Matti Linnanvuori0ef47302008-03-28 16:33:00 -07001238 * is executing from hardware interrupt context or with hardware interrupts
1239 * disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 */
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001241extern void dev_kfree_skb_irq(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242
1243/* Use this variant in places where it could be invoked
Matti Linnanvuori0ef47302008-03-28 16:33:00 -07001244 * from either hardware interrupt or other context, with hardware interrupts
1245 * either disabled or enabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246 */
Denis Vlasenko56079432006-03-29 15:57:29 -08001247extern void dev_kfree_skb_any(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248
1249#define HAVE_NETIF_RX 1
1250extern int netif_rx(struct sk_buff *skb);
1251extern int netif_rx_ni(struct sk_buff *skb);
1252#define HAVE_NETIF_RECEIVE_SKB 1
1253extern int netif_receive_skb(struct sk_buff *skb);
Patrick McHardybc1d0412008-07-14 22:49:30 -07001254extern void netif_nit_deliver(struct sk_buff *skb);
Mitch Williamsc2373ee2005-11-09 10:34:45 -08001255extern int dev_valid_name(const char *name);
Eric W. Biederman881d9662007-09-17 11:56:21 -07001256extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1257extern int dev_ethtool(struct net *net, struct ifreq *);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258extern unsigned dev_get_flags(const struct net_device *);
1259extern int dev_change_flags(struct net_device *, unsigned);
Stephen Hemmingercf04a4c72008-09-30 02:22:14 -07001260extern int dev_change_name(struct net_device *, const char *);
Stephen Hemminger0b815a12008-09-22 21:28:11 -07001261extern int dev_set_alias(struct net_device *, const char *, size_t);
Eric W. Biedermance286d32007-09-12 13:53:49 +02001262extern int dev_change_net_namespace(struct net_device *,
1263 struct net *, const char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264extern int dev_set_mtu(struct net_device *, int);
1265extern int dev_set_mac_address(struct net_device *,
1266 struct sockaddr *);
Herbert Xuf6a78bf2006-06-22 02:57:17 -07001267extern int dev_hard_start_xmit(struct sk_buff *skb,
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001268 struct net_device *dev,
1269 struct netdev_queue *txq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001271extern int netdev_budget;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272
1273/* Called by rtnetlink.c:rtnl_unlock() */
1274extern void netdev_run_todo(void);
1275
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001276/**
1277 * dev_put - release reference to device
1278 * @dev: network device
1279 *
Benjamin Thery9ef44292007-10-10 21:18:17 -07001280 * Release reference to device to allow it to be freed.
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001281 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282static inline void dev_put(struct net_device *dev)
1283{
1284 atomic_dec(&dev->refcnt);
1285}
1286
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001287/**
1288 * dev_hold - get reference to device
1289 * @dev: network device
1290 *
Benjamin Thery9ef44292007-10-10 21:18:17 -07001291 * Hold reference to device to keep it from being freed.
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001292 */
Stephen Hemminger15333062006-03-20 22:32:28 -08001293static inline void dev_hold(struct net_device *dev)
1294{
1295 atomic_inc(&dev->refcnt);
1296}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297
1298/* Carrier loss detection, dial on demand. The functions netif_carrier_on
1299 * and _off may be called from IRQ context, but it is caller
1300 * who is responsible for serialization of these calls.
Stefan Rompfb00055a2006-03-20 17:09:11 -08001301 *
1302 * The name carrier is inappropriate, these functions should really be
1303 * called netif_lowerlayer_*() because they represent the state of any
1304 * kind of lower layer not just hardware media.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 */
1306
1307extern void linkwatch_fire_event(struct net_device *dev);
1308
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001309/**
1310 * netif_carrier_ok - test if carrier present
1311 * @dev: network device
1312 *
1313 * Check if carrier is present on device
1314 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315static inline int netif_carrier_ok(const struct net_device *dev)
1316{
1317 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1318}
1319
1320extern void __netdev_watchdog_up(struct net_device *dev);
1321
Denis Vlasenko0a242ef2005-08-11 15:32:53 -07001322extern void netif_carrier_on(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323
Denis Vlasenko0a242ef2005-08-11 15:32:53 -07001324extern void netif_carrier_off(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001326/**
1327 * netif_dormant_on - mark device as dormant.
1328 * @dev: network device
1329 *
1330 * Mark device as dormant (as per RFC2863).
1331 *
1332 * The dormant state indicates that the relevant interface is not
1333 * actually in a condition to pass packets (i.e., it is not 'up') but is
1334 * in a "pending" state, waiting for some external event. For "on-
1335 * demand" interfaces, this new state identifies the situation where the
1336 * interface is waiting for events to place it in the up state.
1337 *
1338 */
Stefan Rompfb00055a2006-03-20 17:09:11 -08001339static inline void netif_dormant_on(struct net_device *dev)
1340{
1341 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1342 linkwatch_fire_event(dev);
1343}
1344
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001345/**
1346 * netif_dormant_off - set device as not dormant.
1347 * @dev: network device
1348 *
1349 * Device is not in dormant state.
1350 */
Stefan Rompfb00055a2006-03-20 17:09:11 -08001351static inline void netif_dormant_off(struct net_device *dev)
1352{
1353 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1354 linkwatch_fire_event(dev);
1355}
1356
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001357/**
1358 * netif_dormant - test if carrier present
1359 * @dev: network device
1360 *
1361 * Check if carrier is present on device
1362 */
Stefan Rompfb00055a2006-03-20 17:09:11 -08001363static inline int netif_dormant(const struct net_device *dev)
1364{
1365 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1366}
1367
1368
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001369/**
1370 * netif_oper_up - test if device is operational
1371 * @dev: network device
1372 *
1373 * Check if carrier is operational
1374 */
Stefan Rompfb00055a2006-03-20 17:09:11 -08001375static inline int netif_oper_up(const struct net_device *dev) {
1376 return (dev->operstate == IF_OPER_UP ||
1377 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1378}
1379
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001380/**
1381 * netif_device_present - is device available or removed
1382 * @dev: network device
1383 *
1384 * Check if device has not been removed from system.
1385 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386static inline int netif_device_present(struct net_device *dev)
1387{
1388 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1389}
1390
Denis Vlasenko56079432006-03-29 15:57:29 -08001391extern void netif_device_detach(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392
Denis Vlasenko56079432006-03-29 15:57:29 -08001393extern void netif_device_attach(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394
1395/*
1396 * Network interface message level settings
1397 */
1398#define HAVE_NETIF_MSG 1
1399
1400enum {
1401 NETIF_MSG_DRV = 0x0001,
1402 NETIF_MSG_PROBE = 0x0002,
1403 NETIF_MSG_LINK = 0x0004,
1404 NETIF_MSG_TIMER = 0x0008,
1405 NETIF_MSG_IFDOWN = 0x0010,
1406 NETIF_MSG_IFUP = 0x0020,
1407 NETIF_MSG_RX_ERR = 0x0040,
1408 NETIF_MSG_TX_ERR = 0x0080,
1409 NETIF_MSG_TX_QUEUED = 0x0100,
1410 NETIF_MSG_INTR = 0x0200,
1411 NETIF_MSG_TX_DONE = 0x0400,
1412 NETIF_MSG_RX_STATUS = 0x0800,
1413 NETIF_MSG_PKTDATA = 0x1000,
1414 NETIF_MSG_HW = 0x2000,
1415 NETIF_MSG_WOL = 0x4000,
1416};
1417
1418#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1419#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1420#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1421#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1422#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1423#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1424#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1425#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1426#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1427#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1428#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1429#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1430#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1431#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1432#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1433
1434static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1435{
1436 /* use default */
1437 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1438 return default_msg_enable_bits;
1439 if (debug_value == 0) /* no output */
1440 return 0;
1441 /* set low N bits */
1442 return (1 << debug_value) - 1;
1443}
1444
shemminger@osdl.org0a122572005-11-30 11:45:17 -08001445/* Test if receive needs to be scheduled but only if up */
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001446static inline int netif_rx_schedule_prep(struct net_device *dev,
1447 struct napi_struct *napi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448{
David S. Millera0a46192008-01-07 20:35:07 -08001449 return napi_schedule_prep(napi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450}
1451
1452/* Add interface to tail of rx poll list. This assumes that _prep has
1453 * already been called and returned 1.
1454 */
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001455static inline void __netif_rx_schedule(struct net_device *dev,
1456 struct napi_struct *napi)
1457{
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001458 __napi_schedule(napi);
1459}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460
1461/* Try to reschedule poll. Called by irq handler. */
1462
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001463static inline void netif_rx_schedule(struct net_device *dev,
1464 struct napi_struct *napi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465{
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001466 if (netif_rx_schedule_prep(dev, napi))
1467 __netif_rx_schedule(dev, napi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468}
1469
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001470/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
1471static inline int netif_rx_reschedule(struct net_device *dev,
1472 struct napi_struct *napi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473{
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001474 if (napi_schedule_prep(napi)) {
1475 __netif_rx_schedule(dev, napi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476 return 1;
1477 }
1478 return 0;
1479}
1480
Herbert Xub0ba6662007-05-29 13:22:52 -07001481/* same as netif_rx_complete, except that local_irq_save(flags)
1482 * has already been issued
1483 */
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001484static inline void __netif_rx_complete(struct net_device *dev,
1485 struct napi_struct *napi)
Herbert Xub0ba6662007-05-29 13:22:52 -07001486{
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001487 __napi_complete(napi);
Herbert Xub0ba6662007-05-29 13:22:52 -07001488}
1489
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490/* Remove interface from poll list: it must be in the poll list
1491 * on current cpu. This primitive is called by dev->poll(), when
1492 * it completes the work. The device cannot be out of poll list at this
1493 * moment, it is BUG().
1494 */
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001495static inline void netif_rx_complete(struct net_device *dev,
1496 struct napi_struct *napi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497{
1498 unsigned long flags;
1499
1500 local_irq_save(flags);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001501 __netif_rx_complete(dev, napi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502 local_irq_restore(flags);
1503}
1504
David S. Millerc773e842008-07-08 23:13:53 -07001505static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
Herbert Xu932ff272006-06-09 12:20:56 -07001506{
David S. Millerc773e842008-07-08 23:13:53 -07001507 spin_lock(&txq->_xmit_lock);
1508 txq->xmit_lock_owner = cpu;
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07001509}
1510
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001511static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1512{
1513 spin_lock_bh(&txq->_xmit_lock);
1514 txq->xmit_lock_owner = smp_processor_id();
1515}
1516
David S. Millerc773e842008-07-08 23:13:53 -07001517static inline int __netif_tx_trylock(struct netdev_queue *txq)
1518{
1519 int ok = spin_trylock(&txq->_xmit_lock);
1520 if (likely(ok))
1521 txq->xmit_lock_owner = smp_processor_id();
1522 return ok;
Herbert Xu932ff272006-06-09 12:20:56 -07001523}
1524
David S. Millerc773e842008-07-08 23:13:53 -07001525static inline void __netif_tx_unlock(struct netdev_queue *txq)
1526{
1527 txq->xmit_lock_owner = -1;
1528 spin_unlock(&txq->_xmit_lock);
Herbert Xu932ff272006-06-09 12:20:56 -07001529}
1530
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001531static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1532{
1533 txq->xmit_lock_owner = -1;
1534 spin_unlock_bh(&txq->_xmit_lock);
1535}
1536
David S. Millerc3f26a22008-07-31 16:58:50 -07001537/**
1538 * netif_tx_lock - grab network device transmit lock
1539 * @dev: network device
David S. Millerc3f26a22008-07-31 16:58:50 -07001540 *
1541 * Get network device transmit lock
1542 */
1543static inline void netif_tx_lock(struct net_device *dev)
1544{
1545 unsigned int i;
1546 int cpu;
1547
1548 spin_lock(&dev->tx_global_lock);
1549 cpu = smp_processor_id();
1550 for (i = 0; i < dev->num_tx_queues; i++) {
1551 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1552
1553 /* We are the only thread of execution doing a
1554 * freeze, but we have to grab the _xmit_lock in
1555 * order to synchronize with threads which are in
1556 * the ->hard_start_xmit() handler and already
1557 * checked the frozen bit.
1558 */
1559 __netif_tx_lock(txq, cpu);
1560 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1561 __netif_tx_unlock(txq);
1562 }
1563}
1564
1565static inline void netif_tx_lock_bh(struct net_device *dev)
1566{
1567 local_bh_disable();
1568 netif_tx_lock(dev);
1569}
1570
Herbert Xu932ff272006-06-09 12:20:56 -07001571static inline void netif_tx_unlock(struct net_device *dev)
1572{
David S. Millere8a04642008-07-17 00:34:19 -07001573 unsigned int i;
David S. Millerc773e842008-07-08 23:13:53 -07001574
David S. Millere8a04642008-07-17 00:34:19 -07001575 for (i = 0; i < dev->num_tx_queues; i++) {
1576 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
David S. Millere8a04642008-07-17 00:34:19 -07001577
David S. Millerc3f26a22008-07-31 16:58:50 -07001578 /* No need to grab the _xmit_lock here. If the
1579 * queue is not stopped for another reason, we
1580 * force a schedule.
1581 */
1582 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1583 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1584 __netif_schedule(txq->qdisc);
1585 }
1586 spin_unlock(&dev->tx_global_lock);
Herbert Xu932ff272006-06-09 12:20:56 -07001587}
1588
1589static inline void netif_tx_unlock_bh(struct net_device *dev)
1590{
David S. Millere8a04642008-07-17 00:34:19 -07001591 netif_tx_unlock(dev);
1592 local_bh_enable();
Herbert Xu932ff272006-06-09 12:20:56 -07001593}
1594
David S. Millerc773e842008-07-08 23:13:53 -07001595#define HARD_TX_LOCK(dev, txq, cpu) { \
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07001596 if ((dev->features & NETIF_F_LLTX) == 0) { \
David S. Millerc773e842008-07-08 23:13:53 -07001597 __netif_tx_lock(txq, cpu); \
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07001598 } \
1599}
1600
David S. Millerc773e842008-07-08 23:13:53 -07001601#define HARD_TX_UNLOCK(dev, txq) { \
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07001602 if ((dev->features & NETIF_F_LLTX) == 0) { \
David S. Millerc773e842008-07-08 23:13:53 -07001603 __netif_tx_unlock(txq); \
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07001604 } \
1605}
1606
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607static inline void netif_tx_disable(struct net_device *dev)
1608{
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001609 unsigned int i;
David S. Millerc3f26a22008-07-31 16:58:50 -07001610 int cpu;
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001611
David S. Millerc3f26a22008-07-31 16:58:50 -07001612 local_bh_disable();
1613 cpu = smp_processor_id();
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001614 for (i = 0; i < dev->num_tx_queues; i++) {
1615 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
David S. Millerc3f26a22008-07-31 16:58:50 -07001616
1617 __netif_tx_lock(txq, cpu);
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001618 netif_tx_stop_queue(txq);
David S. Millerc3f26a22008-07-31 16:58:50 -07001619 __netif_tx_unlock(txq);
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001620 }
David S. Millerc3f26a22008-07-31 16:58:50 -07001621 local_bh_enable();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622}
1623
David S. Millere308a5d2008-07-15 00:13:44 -07001624static inline void netif_addr_lock(struct net_device *dev)
1625{
1626 spin_lock(&dev->addr_list_lock);
1627}
1628
1629static inline void netif_addr_lock_bh(struct net_device *dev)
1630{
1631 spin_lock_bh(&dev->addr_list_lock);
1632}
1633
1634static inline void netif_addr_unlock(struct net_device *dev)
1635{
1636 spin_unlock(&dev->addr_list_lock);
1637}
1638
1639static inline void netif_addr_unlock_bh(struct net_device *dev)
1640{
1641 spin_unlock_bh(&dev->addr_list_lock);
1642}
1643
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644/* These functions live elsewhere (drivers/net/net_init.c, but related) */
1645
1646extern void ether_setup(struct net_device *dev);
1647
1648/* Support for loadable net-drivers */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001649extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1650 void (*setup)(struct net_device *),
1651 unsigned int queue_count);
1652#define alloc_netdev(sizeof_priv, name, setup) \
1653 alloc_netdev_mq(sizeof_priv, name, setup, 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001654extern int register_netdev(struct net_device *dev);
1655extern void unregister_netdev(struct net_device *dev);
Patrick McHardy4417da62007-06-27 01:28:10 -07001656/* Functions used for secondary unicast and multicast support */
1657extern void dev_set_rx_mode(struct net_device *dev);
1658extern void __dev_set_rx_mode(struct net_device *dev);
1659extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1660extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
Chris Leeche83a2ea2008-01-31 16:53:23 -08001661extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1662extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001663extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1664extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
Patrick McHardya0a400d2007-07-14 18:52:02 -07001665extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1666extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
Patrick McHardy61cbc2f2007-06-30 13:35:52 -07001667extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1668extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
Chris Leeche83a2ea2008-01-31 16:53:23 -08001669extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1670extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
Wang Chendad9b332008-06-18 01:48:28 -07001671extern int dev_set_promiscuity(struct net_device *dev, int inc);
1672extern int dev_set_allmulti(struct net_device *dev, int inc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001673extern void netdev_state_change(struct net_device *dev);
Or Gerlitzc1da4ac2008-06-13 18:12:00 -07001674extern void netdev_bonding_change(struct net_device *dev);
Stephen Hemmingerd8a33ac2005-05-29 14:13:47 -07001675extern void netdev_features_change(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676/* Load a device via the kmod */
Eric W. Biederman881d9662007-09-17 11:56:21 -07001677extern void dev_load(struct net *net, const char *name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001678extern void dev_mcast_init(void);
1679extern int netdev_max_backlog;
1680extern int weight_p;
1681extern int netdev_set_master(struct net_device *dev, struct net_device *master);
Patrick McHardy84fa7932006-08-29 16:44:56 -07001682extern int skb_checksum_help(struct sk_buff *skb);
Herbert Xu576a30e2006-06-27 13:22:38 -07001683extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
Herbert Xufb286bb2005-11-10 13:01:24 -08001684#ifdef CONFIG_BUG
1685extern void netdev_rx_csum_fault(struct net_device *dev);
1686#else
1687static inline void netdev_rx_csum_fault(struct net_device *dev)
1688{
1689}
1690#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001691/* rx skb timestamps */
1692extern void net_enable_timestamp(void);
1693extern void net_disable_timestamp(void);
1694
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001695#ifdef CONFIG_PROC_FS
1696extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1697extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1698extern void dev_seq_stop(struct seq_file *seq, void *v);
1699#endif
1700
Jay Vosburghb8a97872008-06-13 18:12:04 -07001701extern int netdev_class_create_file(struct class_attribute *class_attr);
1702extern void netdev_class_remove_file(struct class_attribute *class_attr);
1703
Stephen Hemmingercf04a4c72008-09-30 02:22:14 -07001704extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
Arjan van de Ven6579e572008-07-21 13:31:48 -07001705
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001706extern void linkwatch_run_queue(void);
1707
Herbert Xub63365a2008-10-23 01:11:29 -07001708unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1709 unsigned long mask);
1710unsigned long netdev_fix_features(unsigned long features, const char *name);
Herbert Xu7f353bf2007-08-10 15:47:58 -07001711
Herbert Xubcd76112006-06-30 13:36:35 -07001712static inline int net_gso_ok(int features, int gso_type)
1713{
1714 int feature = gso_type << NETIF_F_GSO_SHIFT;
1715 return (features & feature) == feature;
1716}
1717
Herbert Xu576a30e2006-06-27 13:22:38 -07001718static inline int skb_gso_ok(struct sk_buff *skb, int features)
1719{
Herbert Xua430a432006-07-08 13:34:56 -07001720 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
Herbert Xu576a30e2006-06-27 13:22:38 -07001721}
1722
Herbert Xu79671682006-06-22 02:40:14 -07001723static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1724{
Herbert Xua430a432006-07-08 13:34:56 -07001725 return skb_is_gso(skb) &&
1726 (!skb_gso_ok(skb, dev->features) ||
Patrick McHardy84fa7932006-08-29 16:44:56 -07001727 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
Herbert Xu79671682006-06-22 02:40:14 -07001728}
1729
Peter P Waskiewicz Jr82cc1a72008-03-21 03:43:19 -07001730static inline void netif_set_gso_max_size(struct net_device *dev,
1731 unsigned int size)
1732{
1733 dev->gso_max_size = size;
1734}
1735
David S. Miller7ea49ed2006-08-14 17:08:36 -07001736/* On bonding slaves other than the currently active slave, suppress
Jay Vosburghf5b2b962006-09-22 21:54:53 -07001737 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1738 * ARP on active-backup slaves with arp_validate enabled.
David S. Miller7ea49ed2006-08-14 17:08:36 -07001739 */
1740static inline int skb_bond_should_drop(struct sk_buff *skb)
1741{
1742 struct net_device *dev = skb->dev;
1743 struct net_device *master = dev->master;
1744
1745 if (master &&
1746 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
Jay Vosburghf5b2b962006-09-22 21:54:53 -07001747 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1748 skb->protocol == __constant_htons(ETH_P_ARP))
1749 return 0;
1750
David S. Miller7ea49ed2006-08-14 17:08:36 -07001751 if (master->priv_flags & IFF_MASTER_ALB) {
1752 if (skb->pkt_type != PACKET_BROADCAST &&
1753 skb->pkt_type != PACKET_MULTICAST)
1754 return 0;
1755 }
1756 if (master->priv_flags & IFF_MASTER_8023AD &&
1757 skb->protocol == __constant_htons(ETH_P_SLOW))
1758 return 0;
1759
1760 return 1;
1761 }
1762 return 0;
1763}
1764
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765#endif /* __KERNEL__ */
1766
1767#endif /* _LINUX_DEV_H */