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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>
14 * Alan Cox, <Alan.Cox@linux.org>
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>
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>
45
Linus Torvalds1da177e2005-04-16 15:20:36 -070046struct vlan_group;
47struct ethtool_ops;
Jeff Moyer115c1d62005-06-22 22:05:31 -070048struct netpoll_info;
Johannes Berg704232c2007-04-23 12:20:05 -070049/* 802.11 specific */
50struct wireless_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 /* source back-compat hooks */
52#define SET_ETHTOOL_OPS(netdev,ops) \
53 ( (netdev)->ethtool_ops = (ops) )
54
55#define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
56 functions are available. */
57#define HAVE_FREE_NETDEV /* free_netdev() */
58#define HAVE_NETDEV_PRIV /* netdev_priv() */
59
60#define NET_XMIT_SUCCESS 0
61#define NET_XMIT_DROP 1 /* skb dropped */
62#define NET_XMIT_CN 2 /* congestion notification */
63#define NET_XMIT_POLICED 3 /* skb is shot by police */
64#define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
65 (TC use only - dev_queue_xmit
66 returns this as NET_XMIT_SUCCESS) */
67
68/* Backlog congestion levels */
69#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
70#define NET_RX_DROP 1 /* packet dropped */
71#define NET_RX_CN_LOW 2 /* storm alert, just in case */
72#define NET_RX_CN_MOD 3 /* Storm on its way! */
73#define NET_RX_CN_HIGH 4 /* The storm is here */
74#define NET_RX_BAD 5 /* packet dropped due to kernel error */
75
Gerrit Renkerb9df3cb2006-11-14 11:21:36 -020076/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
77 * indicates that the device will soon be dropping packets, or already drops
78 * some packets of the same priority; prompting us to send less aggressively. */
79#define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
Linus Torvalds1da177e2005-04-16 15:20:36 -070080#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
81
82#endif
83
84#define MAX_ADDR_LEN 32 /* Largest hardware address length */
85
86/* Driver transmit return codes */
87#define NETDEV_TX_OK 0 /* driver took care of packet */
88#define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
89#define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
90
91/*
92 * Compute the worst case header length according to the protocols
93 * used.
94 */
95
96#if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
97#define LL_MAX_HEADER 32
98#else
99#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
100#define LL_MAX_HEADER 96
101#else
102#define LL_MAX_HEADER 48
103#endif
104#endif
105
David S. Millere81c73592006-11-28 20:53:39 -0800106#if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
107 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
108 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
109 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110#define MAX_HEADER LL_MAX_HEADER
111#else
112#define MAX_HEADER (LL_MAX_HEADER + 48)
113#endif
114
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -0700115struct net_device_subqueue
116{
117 /* Give a control state for each queue. This struct may contain
118 * per-queue locks in the future.
119 */
120 unsigned long state;
121};
122
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123/*
124 * Network device statistics. Akin to the 2.0 ether stats but
125 * with byte counters.
126 */
127
128struct net_device_stats
129{
130 unsigned long rx_packets; /* total packets received */
131 unsigned long tx_packets; /* total packets transmitted */
132 unsigned long rx_bytes; /* total bytes received */
133 unsigned long tx_bytes; /* total bytes transmitted */
134 unsigned long rx_errors; /* bad packets received */
135 unsigned long tx_errors; /* packet transmit problems */
136 unsigned long rx_dropped; /* no space in linux buffers */
137 unsigned long tx_dropped; /* no space available in linux */
138 unsigned long multicast; /* multicast packets received */
139 unsigned long collisions;
140
141 /* detailed rx_errors: */
142 unsigned long rx_length_errors;
143 unsigned long rx_over_errors; /* receiver ring buff overflow */
144 unsigned long rx_crc_errors; /* recved pkt with crc error */
145 unsigned long rx_frame_errors; /* recv'd frame alignment error */
146 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
147 unsigned long rx_missed_errors; /* receiver missed packet */
148
149 /* detailed tx_errors */
150 unsigned long tx_aborted_errors;
151 unsigned long tx_carrier_errors;
152 unsigned long tx_fifo_errors;
153 unsigned long tx_heartbeat_errors;
154 unsigned long tx_window_errors;
155
156 /* for cslip etc */
157 unsigned long rx_compressed;
158 unsigned long tx_compressed;
159};
160
161
162/* Media selection options. */
163enum {
164 IF_PORT_UNKNOWN = 0,
165 IF_PORT_10BASE2,
166 IF_PORT_10BASET,
167 IF_PORT_AUI,
168 IF_PORT_100BASET,
169 IF_PORT_100BASETX,
170 IF_PORT_100BASEFX
171};
172
173#ifdef __KERNEL__
174
175#include <linux/cache.h>
176#include <linux/skbuff.h>
177
178struct neighbour;
179struct neigh_parms;
180struct sk_buff;
181
182struct netif_rx_stats
183{
184 unsigned total;
185 unsigned dropped;
186 unsigned time_squeeze;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 unsigned cpu_collision;
188};
189
190DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
191
Patrick McHardybf742482007-06-27 01:26:19 -0700192struct dev_addr_list
193{
194 struct dev_addr_list *next;
195 u8 da_addr[MAX_ADDR_LEN];
196 u8 da_addrlen;
Patrick McHardya0a400d2007-07-14 18:52:02 -0700197 u8 da_synced;
Patrick McHardybf742482007-06-27 01:26:19 -0700198 int da_users;
199 int da_gusers;
200};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201
202/*
203 * We tag multicasts with these structures.
204 */
Patrick McHardy3fba5a82007-06-27 01:26:58 -0700205
206#define dev_mc_list dev_addr_list
207#define dmi_addr da_addr
208#define dmi_addrlen da_addrlen
209#define dmi_users da_users
210#define dmi_gusers da_gusers
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211
212struct hh_cache
213{
214 struct hh_cache *hh_next; /* Next entry */
215 atomic_t hh_refcnt; /* number of users */
Eric Dumazetf0490982006-12-08 00:08:43 -0800216/*
217 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
218 * cache line on SMP.
219 * They are mostly read, but hh_refcnt may be changed quite frequently,
220 * incurring cache line ping pongs.
221 */
222 __be16 hh_type ____cacheline_aligned_in_smp;
223 /* protocol identifier, f.e ETH_P_IP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 * NOTE: For VLANs, this will be the
225 * encapuslated type. --BLG
226 */
Arnaldo Carvalho de Melod5c42c02006-11-27 17:58:02 -0200227 u16 hh_len; /* length of header */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 int (*hh_output)(struct sk_buff *skb);
Stephen Hemminger3644f0c2006-12-07 15:08:17 -0800229 seqlock_t hh_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
231 /* cached hardware header; allow for machine alignment needs. */
232#define HH_DATA_MOD 16
233#define HH_DATA_OFF(__len) \
Jiri Benc5ba0eac2005-06-02 16:48:05 -0700234 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235#define HH_DATA_ALIGN(__len) \
236 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
237 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
238};
239
240/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
241 * Alternative is:
242 * dev->hard_header_len ? (dev->hard_header_len +
243 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
244 *
245 * We could use other alignment values, but we must maintain the
246 * relationship HH alignment <= LL alignment.
247 */
248#define LL_RESERVED_SPACE(dev) \
249 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
250#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
251 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
252
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700253struct header_ops {
254 int (*create) (struct sk_buff *skb, struct net_device *dev,
255 unsigned short type, const void *daddr,
256 const void *saddr, unsigned len);
257 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
258 int (*rebuild)(struct sk_buff *skb);
259#define HAVE_HEADER_CACHE
260 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
261 void (*cache_update)(struct hh_cache *hh,
262 const struct net_device *dev,
263 const unsigned char *haddr);
264};
265
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266/* These flag bits are private to the generic network queueing
267 * layer, they may not be explicitly referenced by any other
268 * code.
269 */
270
271enum netdev_state_t
272{
273 __LINK_STATE_XOFF=0,
274 __LINK_STATE_START,
275 __LINK_STATE_PRESENT,
276 __LINK_STATE_SCHED,
277 __LINK_STATE_NOCARRIER,
Stefan Rompfb00055a2006-03-20 17:09:11 -0800278 __LINK_STATE_LINKWATCH_PENDING,
279 __LINK_STATE_DORMANT,
Herbert Xu48d83322006-06-19 23:57:59 -0700280 __LINK_STATE_QDISC_RUNNING,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281};
282
283
284/*
285 * This structure holds at boot time configured netdevice settings. They
286 * are then used in the device probing.
287 */
288struct netdev_boot_setup {
289 char name[IFNAMSIZ];
290 struct ifmap map;
291};
292#define NETDEV_BOOT_SETUP_MAX 8
293
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300294extern int __init netdev_boot_setup(char *str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295
296/*
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700297 * Structure for NAPI scheduling similar to tasklet but with weighting
298 */
299struct napi_struct {
300 /* The poll_list must only be managed by the entity which
301 * changes the state of the NAPI_STATE_SCHED bit. This means
302 * whoever atomically sets that bit can add this napi_struct
303 * to the per-cpu poll_list, and whoever clears that bit
304 * can remove from the list right before clearing the bit.
305 */
306 struct list_head poll_list;
307
308 unsigned long state;
309 int weight;
310 int (*poll)(struct napi_struct *, int);
311#ifdef CONFIG_NETPOLL
312 spinlock_t poll_lock;
313 int poll_owner;
314 struct net_device *dev;
315 struct list_head dev_list;
316#endif
317};
318
319enum
320{
321 NAPI_STATE_SCHED, /* Poll is scheduled */
322};
323
324extern void FASTCALL(__napi_schedule(struct napi_struct *n));
325
326/**
327 * napi_schedule_prep - check if napi can be scheduled
328 * @n: napi context
329 *
330 * Test if NAPI routine is already running, and if not mark
331 * it as running. This is used as a condition variable
332 * insure only one NAPI poll instance runs
333 */
334static inline int napi_schedule_prep(struct napi_struct *n)
335{
336 return !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
337}
338
339/**
340 * napi_schedule - schedule NAPI poll
341 * @n: napi context
342 *
343 * Schedule NAPI poll routine to be called if it is not already
344 * running.
345 */
346static inline void napi_schedule(struct napi_struct *n)
347{
348 if (napi_schedule_prep(n))
349 __napi_schedule(n);
350}
351
Roland Dreierbfe13f52007-10-09 15:47:37 -0700352/* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
353static inline int napi_reschedule(struct napi_struct *napi)
354{
355 if (napi_schedule_prep(napi)) {
356 __napi_schedule(napi);
357 return 1;
358 }
359 return 0;
360}
361
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700362/**
363 * napi_complete - NAPI processing complete
364 * @n: napi context
365 *
366 * Mark NAPI processing as complete.
367 */
368static inline void __napi_complete(struct napi_struct *n)
369{
370 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
371 list_del(&n->poll_list);
372 smp_mb__before_clear_bit();
373 clear_bit(NAPI_STATE_SCHED, &n->state);
374}
375
376static inline void napi_complete(struct napi_struct *n)
377{
378 local_irq_disable();
379 __napi_complete(n);
380 local_irq_enable();
381}
382
383/**
384 * napi_disable - prevent NAPI from scheduling
385 * @n: napi context
386 *
387 * Stop NAPI from being scheduled on this context.
388 * Waits till any outstanding processing completes.
389 */
390static inline void napi_disable(struct napi_struct *n)
391{
392 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
393 msleep_interruptible(1);
394}
395
396/**
397 * napi_enable - enable NAPI scheduling
398 * @n: napi context
399 *
400 * Resume NAPI from being scheduled on this context.
401 * Must be paired with napi_disable.
402 */
403static inline void napi_enable(struct napi_struct *n)
404{
405 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
406 smp_mb__before_clear_bit();
407 clear_bit(NAPI_STATE_SCHED, &n->state);
408}
409
410/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 * The DEVICE structure.
412 * Actually, this whole structure is a big mistake. It mixes I/O
413 * data with strictly "high-level" data, and it has to know about
414 * almost every data structure used in the INET module.
415 *
416 * FIXME: cleanup struct net_device such that network protocol info
417 * moves out.
418 */
419
420struct net_device
421{
422
423 /*
424 * This is the first field of the "visible" part of this structure
425 * (i.e. as seen by users in the "Space.c" file). It is the name
426 * the interface.
427 */
428 char name[IFNAMSIZ];
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700429 /* device name hash chain */
430 struct hlist_node name_hlist;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
432 /*
433 * I/O specific fields
434 * FIXME: Merge these and struct ifmap into one
435 */
436 unsigned long mem_end; /* shared mem end */
437 unsigned long mem_start; /* shared mem start */
438 unsigned long base_addr; /* device I/O address */
439 unsigned int irq; /* device IRQ number */
440
441 /*
442 * Some hardware also needs these fields, but they are not
443 * part of the usual set specified in Space.c.
444 */
445
446 unsigned char if_port; /* Selectable AUI, TP,..*/
447 unsigned char dma; /* DMA channel */
448
449 unsigned long state;
450
Pavel Emelianov7562f872007-05-03 15:13:45 -0700451 struct list_head dev_list;
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700452#ifdef CONFIG_NETPOLL
453 struct list_head napi_list;
454#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
456 /* The device initialization function. Called only once. */
457 int (*init)(struct net_device *dev);
458
459 /* ------- Fields preinitialized in Space.c finish here ------- */
460
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700461 /* Net device features */
462 unsigned long features;
463#define NETIF_F_SG 1 /* Scatter/gather IO. */
Stephen Hemmingerd212f872007-06-27 00:47:37 -0700464#define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700465#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
466#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
Stephen Hemmingerd212f872007-06-27 00:47:37 -0700467#define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700468#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
469#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
470#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
471#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
472#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
473#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
Herbert Xu37c31852006-06-22 03:07:29 -0700474#define NETIF_F_GSO 2048 /* Enable software GSO. */
Christian Borntraegere24eb522007-09-25 19:42:02 -0700475#define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
476 /* do not use LLTX in new drivers */
Eric W. Biedermance286d32007-09-12 13:53:49 +0200477#define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -0700478#define NETIF_F_MULTI_QUEUE 16384 /* Has multiple TX/RX queues */
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -0700479#define NETIF_F_LRO 32768 /* large receive offload */
Herbert Xu79671682006-06-22 02:40:14 -0700480
481 /* Segmentation offload features */
482#define NETIF_F_GSO_SHIFT 16
Herbert Xubcd76112006-06-30 13:36:35 -0700483#define NETIF_F_GSO_MASK 0xffff0000
Herbert Xu79671682006-06-22 02:40:14 -0700484#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
Herbert Xuf83ef8c2006-06-30 13:37:03 -0700485#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
Herbert Xu576a30e2006-06-27 13:22:38 -0700486#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
Herbert Xuf83ef8c2006-06-30 13:37:03 -0700487#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
488#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700489
Herbert Xu78eb8872006-08-17 18:22:32 -0700490 /* List of features with software fallbacks. */
491#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
492
Stephen Hemmingerd212f872007-06-27 00:47:37 -0700493
Herbert Xu8648b302006-06-17 22:06:05 -0700494#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
Stephen Hemmingerd212f872007-06-27 00:47:37 -0700495#define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
496#define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
497#define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
Herbert Xu8648b302006-06-17 22:06:05 -0700498
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 struct net_device *next_sched;
500
501 /* Interface index. Unique device identifier */
502 int ifindex;
503 int iflink;
504
505
506 struct net_device_stats* (*get_stats)(struct net_device *dev);
Rusty Russellc45d2862007-03-28 14:29:08 -0700507 struct net_device_stats stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508
Johannes Bergb86e0282007-04-26 20:48:23 -0700509#ifdef CONFIG_WIRELESS_EXT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 /* List of functions to handle Wireless Extensions (instead of ioctl).
511 * See <net/iw_handler.h> for details. Jean II */
512 const struct iw_handler_def * wireless_handlers;
513 /* Instance data managed by the core of Wireless Extensions. */
514 struct iw_public_data * wireless_data;
Johannes Bergb86e0282007-04-26 20:48:23 -0700515#endif
Stephen Hemminger76fd8592006-09-08 11:16:13 -0700516 const struct ethtool_ops *ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700518 /* Hardware header description */
519 const struct header_ops *header_ops;
520
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 /*
522 * This marks the end of the "visible" part of the structure. All
523 * fields hereafter are internal to the system, and may change at
524 * will (read: may be cleaned up at will).
525 */
526
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527
Stefan Rompfb00055a2006-03-20 17:09:11 -0800528 unsigned int flags; /* interface flags (a la BSD) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 unsigned short gflags;
530 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
531 unsigned short padded; /* How much padding added by alloc_netdev() */
532
Stefan Rompfb00055a2006-03-20 17:09:11 -0800533 unsigned char operstate; /* RFC2863 operstate */
534 unsigned char link_mode; /* mapping policy to operstate */
535
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 unsigned mtu; /* interface MTU value */
537 unsigned short type; /* interface hardware type */
538 unsigned short hard_header_len; /* hardware hdr length */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539
540 struct net_device *master; /* Pointer to master device of a group,
541 * which this device is member of.
542 */
543
544 /* Interface address info. */
Jon Wetzela6f9a702005-08-20 17:15:54 -0700545 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 unsigned char addr_len; /* hardware address length */
547 unsigned short dev_id; /* for shared network cards */
548
Patrick McHardy4417da62007-06-27 01:28:10 -0700549 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
550 int uc_count; /* Number of installed ucasts */
551 int uc_promisc;
Patrick McHardy3fba5a82007-06-27 01:26:58 -0700552 struct dev_addr_list *mc_list; /* Multicast mac addresses */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 int mc_count; /* Number of installed mcasts */
554 int promiscuity;
555 int allmulti;
556
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557
558 /* Protocol specific pointers */
559
560 void *atalk_ptr; /* AppleTalk link */
561 void *ip_ptr; /* IPv4 specific data */
562 void *dn_ptr; /* DECnet specific data */
563 void *ip6_ptr; /* IPv6 specific data */
564 void *ec_ptr; /* Econet specific data */
565 void *ax25_ptr; /* AX.25 specific data */
Johannes Berg704232c2007-04-23 12:20:05 -0700566 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
567 assign before registering */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700569/*
570 * Cache line mostly used on receive path (including eth_type_trans())
571 */
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700572 unsigned long last_rx; /* Time of last Rx */
573 /* Interface address info used in eth_type_trans() */
574 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
575 because most packets are unicast) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700577 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
578
579/*
580 * Cache line mostly used on queue transmit path (qdisc)
581 */
582 /* device queue lock */
583 spinlock_t queue_lock ____cacheline_aligned_in_smp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 struct Qdisc *qdisc;
585 struct Qdisc *qdisc_sleeping;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 struct list_head qdisc_list;
587 unsigned long tx_queue_len; /* Max frames per queue allowed */
588
Herbert Xuf6a78bf2006-06-22 02:57:17 -0700589 /* Partially transmitted GSO packet. */
590 struct sk_buff *gso_skb;
591
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 /* ingress path synchronizer */
593 spinlock_t ingress_lock;
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700594 struct Qdisc *qdisc_ingress;
595
596/*
597 * One part is mostly used on xmit path (device)
598 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 /* hard_start_xmit synchronizer */
Herbert Xu932ff272006-06-09 12:20:56 -0700600 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 /* cpu id of processor entered to hard_start_xmit or -1,
602 if nobody entered there.
603 */
604 int xmit_lock_owner;
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700605 void *priv; /* pointer to private data */
606 int (*hard_start_xmit) (struct sk_buff *skb,
607 struct net_device *dev);
608 /* These may be needed for future network-power-down code. */
609 unsigned long trans_start; /* Time (in jiffies) of last Tx */
610
611 int watchdog_timeo; /* used by dev_watchdog() */
612 struct timer_list watchdog_timer;
613
614/*
615 * refcnt is a very hot point, so align it on SMP
616 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 /* Number of references to this device */
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700618 atomic_t refcnt ____cacheline_aligned_in_smp;
619
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 /* delayed register/unregister */
621 struct list_head todo_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 /* device index hash chain */
623 struct hlist_node index_hlist;
624
Herbert Xu572a1032007-05-08 18:34:17 -0700625 struct net_device *link_watch_next;
626
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 /* register/unregister state machine */
628 enum { NETREG_UNINITIALIZED=0,
Stephen Hemmingerb17a7c12006-05-10 13:21:17 -0700629 NETREG_REGISTERED, /* completed register_netdevice */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 NETREG_UNREGISTERING, /* called unregister_netdevice */
631 NETREG_UNREGISTERED, /* completed unregister todo */
632 NETREG_RELEASED, /* called free_netdev */
633 } reg_state;
634
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 /* Called after device is detached from network. */
636 void (*uninit)(struct net_device *dev);
637 /* Called after last user reference disappears. */
638 void (*destructor)(struct net_device *dev);
639
640 /* Pointers to interface service routines. */
641 int (*open)(struct net_device *dev);
642 int (*stop)(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643#define HAVE_NETDEV_POLL
Patrick McHardy24023452007-07-14 18:51:31 -0700644#define HAVE_CHANGE_RX_FLAGS
645 void (*change_rx_flags)(struct net_device *dev,
646 int flags);
Patrick McHardy4417da62007-06-27 01:28:10 -0700647#define HAVE_SET_RX_MODE
648 void (*set_rx_mode)(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649#define HAVE_MULTICAST
650 void (*set_multicast_list)(struct net_device *dev);
651#define HAVE_SET_MAC_ADDR
652 int (*set_mac_address)(struct net_device *dev,
653 void *addr);
654#define HAVE_PRIVATE_IOCTL
655 int (*do_ioctl)(struct net_device *dev,
656 struct ifreq *ifr, int cmd);
657#define HAVE_SET_CONFIG
658 int (*set_config)(struct net_device *dev,
659 struct ifmap *map);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660#define HAVE_CHANGE_MTU
661 int (*change_mtu)(struct net_device *dev, int new_mtu);
662
663#define HAVE_TX_TIMEOUT
664 void (*tx_timeout) (struct net_device *dev);
665
666 void (*vlan_rx_register)(struct net_device *dev,
667 struct vlan_group *grp);
668 void (*vlan_rx_add_vid)(struct net_device *dev,
669 unsigned short vid);
670 void (*vlan_rx_kill_vid)(struct net_device *dev,
671 unsigned short vid);
672
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
674#ifdef CONFIG_NETPOLL
Jeff Moyer115c1d62005-06-22 22:05:31 -0700675 struct netpoll_info *npinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676#endif
677#ifdef CONFIG_NET_POLL_CONTROLLER
678 void (*poll_controller)(struct net_device *dev);
679#endif
680
Eric W. Biederman4a1c5372007-09-12 11:56:32 +0200681 /* Network namespace this network device is inside */
682 struct net *nd_net;
683
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 /* bridge stuff */
685 struct net_bridge_port *br_port;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700686 /* macvlan */
687 struct macvlan_port *macvlan_port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 /* class/net/name entry */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700690 struct device dev;
Stephen Hemmingerfe9925b2006-05-06 17:56:03 -0700691 /* space for optional statistics and wireless sysfs groups */
692 struct attribute_group *sysfs_groups[3];
Patrick McHardy38f7b872007-06-13 12:03:51 -0700693
694 /* rtnetlink link ops */
695 const struct rtnl_link_ops *rtnl_link_ops;
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -0700696
697 /* The TX queue control structures */
698 unsigned int egress_subqueue_count;
Patrick McHardy31ce72a2007-07-20 19:45:45 -0700699 struct net_device_subqueue egress_subqueue[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700};
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700701#define to_net_dev(d) container_of(d, struct net_device, dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702
703#define NETDEV_ALIGN 32
704#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
705
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700706/**
707 * netdev_priv - access network device private data
708 * @dev: network device
709 *
710 * Get network device private data
711 */
Patrick McHardy6472ce62007-06-13 12:03:21 -0700712static inline void *netdev_priv(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713{
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -0700714 return dev->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715}
716
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717/* Set the sysfs physical device reference for the network logical device
718 * if set prior to registration will cause a symlink during initialization.
719 */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700720#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700722static inline void netif_napi_add(struct net_device *dev,
723 struct napi_struct *napi,
724 int (*poll)(struct napi_struct *, int),
725 int weight)
726{
727 INIT_LIST_HEAD(&napi->poll_list);
728 napi->poll = poll;
729 napi->weight = weight;
730#ifdef CONFIG_NETPOLL
731 napi->dev = dev;
732 list_add(&napi->dev_list, &dev->napi_list);
733 spin_lock_init(&napi->poll_lock);
734 napi->poll_owner = -1;
735#endif
736 set_bit(NAPI_STATE_SCHED, &napi->state);
737}
738
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739struct packet_type {
David S. Millerf2ccd8f2005-08-09 19:34:12 -0700740 __be16 type; /* This is really htons(ether_type). */
741 struct net_device *dev; /* NULL is wildcarded here */
742 int (*func) (struct sk_buff *,
743 struct net_device *,
744 struct packet_type *,
745 struct net_device *);
Herbert Xu576a30e2006-06-27 13:22:38 -0700746 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
747 int features);
Herbert Xua430a432006-07-08 13:34:56 -0700748 int (*gso_send_check)(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 void *af_packet_priv;
750 struct list_head list;
751};
752
753#include <linux/interrupt.h>
754#include <linux/notifier.h>
755
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756extern rwlock_t dev_base_lock; /* Device list lock */
757
Eric W. Biederman881d9662007-09-17 11:56:21 -0700758
759#define for_each_netdev(net, d) \
760 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
761#define for_each_netdev_safe(net, d, n) \
762 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
763#define for_each_netdev_continue(net, d) \
764 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
Pavel Emelianov7562f872007-05-03 15:13:45 -0700765#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
766
Daniel Lezcanoa050c332007-09-12 14:57:09 +0200767static inline struct net_device *next_net_device(struct net_device *dev)
768{
769 struct list_head *lh;
770 struct net *net;
Pavel Emelianov7562f872007-05-03 15:13:45 -0700771
Daniel Lezcanoa050c332007-09-12 14:57:09 +0200772 net = dev->nd_net;
773 lh = dev->dev_list.next;
774 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
775}
776
777static inline struct net_device *first_net_device(struct net *net)
778{
779 return list_empty(&net->dev_base_head) ? NULL :
780 net_device_entry(net->dev_base_head.next);
781}
Pavel Emelianov7562f872007-05-03 15:13:45 -0700782
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783extern int netdev_boot_setup_check(struct net_device *dev);
784extern unsigned long netdev_boot_base(const char *prefix, int unit);
Eric W. Biederman881d9662007-09-17 11:56:21 -0700785extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
786extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
787extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788extern void dev_add_pack(struct packet_type *pt);
789extern void dev_remove_pack(struct packet_type *pt);
790extern void __dev_remove_pack(struct packet_type *pt);
791
Eric W. Biederman881d9662007-09-17 11:56:21 -0700792extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 unsigned short mask);
Eric W. Biederman881d9662007-09-17 11:56:21 -0700794extern struct net_device *dev_get_by_name(struct net *net, const char *name);
795extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796extern int dev_alloc_name(struct net_device *dev, const char *name);
797extern int dev_open(struct net_device *dev);
798extern int dev_close(struct net_device *dev);
799extern int dev_queue_xmit(struct sk_buff *skb);
800extern int register_netdevice(struct net_device *dev);
Stephen Hemminger22f8cde2007-02-07 00:09:58 -0800801extern void unregister_netdevice(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802extern void free_netdev(struct net_device *dev);
803extern void synchronize_net(void);
804extern int register_netdevice_notifier(struct notifier_block *nb);
805extern int unregister_netdevice_notifier(struct notifier_block *nb);
Eric W. Biedermanad7379d2007-09-16 15:33:32 -0700806extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
Eric W. Biederman881d9662007-09-17 11:56:21 -0700807extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
808extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809extern int dev_restart(struct net_device *dev);
810#ifdef CONFIG_NETPOLL_TRAP
811extern int netpoll_trap(void);
812#endif
813
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700814static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
815 unsigned short type,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700816 const void *daddr, const void *saddr,
817 unsigned len)
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700818{
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700819 if (!dev->header_ops)
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700820 return 0;
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700821
822 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700823}
824
Stephen Hemmingerb95cce32007-09-26 22:13:38 -0700825static inline int dev_parse_header(const struct sk_buff *skb,
826 unsigned char *haddr)
827{
828 const struct net_device *dev = skb->dev;
829
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700830 if (!dev->header_ops->parse)
Stephen Hemmingerb95cce32007-09-26 22:13:38 -0700831 return 0;
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700832 return dev->header_ops->parse(skb, haddr);
Stephen Hemmingerb95cce32007-09-26 22:13:38 -0700833}
834
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
836extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
837static inline int unregister_gifconf(unsigned int family)
838{
839 return register_gifconf(family, NULL);
840}
841
842/*
843 * Incoming packets are placed on per-cpu queues so that
844 * no locking is needed.
845 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846struct softnet_data
847{
Stephen Hemminger31aa02c2005-06-23 20:12:48 -0700848 struct net_device *output_queue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 struct sk_buff_head input_pkt_queue;
850 struct list_head poll_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 struct sk_buff *completion_queue;
852
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700853 struct napi_struct backlog;
Chris Leechdb217332006-06-17 21:24:58 -0700854#ifdef CONFIG_NET_DMA
855 struct dma_chan *net_dma;
856#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857};
858
859DECLARE_PER_CPU(struct softnet_data,softnet_data);
860
861#define HAVE_NETIF_QUEUE
862
Denis Vlasenko56079432006-03-29 15:57:29 -0800863extern void __netif_schedule(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864
865static inline void netif_schedule(struct net_device *dev)
866{
867 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
868 __netif_schedule(dev);
869}
870
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700871/**
872 * netif_start_queue - allow transmit
873 * @dev: network device
874 *
875 * Allow upper layers to call the device hard_start_xmit routine.
876 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877static inline void netif_start_queue(struct net_device *dev)
878{
879 clear_bit(__LINK_STATE_XOFF, &dev->state);
880}
881
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700882/**
883 * netif_wake_queue - restart transmit
884 * @dev: network device
885 *
886 * Allow upper layers to call the device hard_start_xmit routine.
887 * Used for flow control when transmit resources are available.
888 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889static inline void netif_wake_queue(struct net_device *dev)
890{
891#ifdef CONFIG_NETPOLL_TRAP
Sergei Shtylyov5f286e12007-04-28 20:57:37 -0700892 if (netpoll_trap()) {
893 clear_bit(__LINK_STATE_XOFF, &dev->state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 return;
Sergei Shtylyov5f286e12007-04-28 20:57:37 -0700895 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896#endif
897 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
898 __netif_schedule(dev);
899}
900
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700901/**
902 * netif_stop_queue - stop transmitted packets
903 * @dev: network device
904 *
905 * Stop upper layers calling the device hard_start_xmit routine.
906 * Used for flow control when transmit resources are unavailable.
907 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908static inline void netif_stop_queue(struct net_device *dev)
909{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 set_bit(__LINK_STATE_XOFF, &dev->state);
911}
912
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700913/**
914 * netif_queue_stopped - test if transmit queue is flowblocked
915 * @dev: network device
916 *
917 * Test if transmit queue on device is currently unable to send.
918 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919static inline int netif_queue_stopped(const struct net_device *dev)
920{
921 return test_bit(__LINK_STATE_XOFF, &dev->state);
922}
923
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700924/**
925 * netif_running - test if up
926 * @dev: network device
927 *
928 * Test if the device has been brought up.
929 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930static inline int netif_running(const struct net_device *dev)
931{
932 return test_bit(__LINK_STATE_START, &dev->state);
933}
934
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -0700935/*
936 * Routines to manage the subqueues on a device. We only need start
937 * stop, and a check if it's stopped. All other device management is
938 * done at the overall netdevice level.
939 * Also test the device if we're multiqueue.
940 */
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700941
942/**
943 * netif_start_subqueue - allow sending packets on subqueue
944 * @dev: network device
945 * @queue_index: sub queue index
946 *
947 * Start individual transmit queue of a device with multiple transmit queues.
948 */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -0700949static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
950{
951#ifdef CONFIG_NETDEVICES_MULTIQUEUE
952 clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
953#endif
954}
955
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700956/**
957 * netif_stop_subqueue - stop sending packets on subqueue
958 * @dev: network device
959 * @queue_index: sub queue index
960 *
961 * Stop individual transmit queue of a device with multiple transmit queues.
962 */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -0700963static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
964{
965#ifdef CONFIG_NETDEVICES_MULTIQUEUE
966#ifdef CONFIG_NETPOLL_TRAP
967 if (netpoll_trap())
968 return;
969#endif
970 set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
971#endif
972}
973
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700974/**
975 * netif_subqueue_stopped - test status of subqueue
976 * @dev: network device
977 * @queue_index: sub queue index
978 *
979 * Check individual transmit queue of a device with multiple transmit queues.
980 */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -0700981static inline int netif_subqueue_stopped(const struct net_device *dev,
982 u16 queue_index)
983{
984#ifdef CONFIG_NETDEVICES_MULTIQUEUE
985 return test_bit(__LINK_STATE_XOFF,
986 &dev->egress_subqueue[queue_index].state);
987#else
988 return 0;
989#endif
990}
991
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700992
993/**
994 * netif_wake_subqueue - allow sending packets on subqueue
995 * @dev: network device
996 * @queue_index: sub queue index
997 *
998 * Resume individual transmit queue of a device with multiple transmit queues.
999 */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001000static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1001{
1002#ifdef CONFIG_NETDEVICES_MULTIQUEUE
1003#ifdef CONFIG_NETPOLL_TRAP
1004 if (netpoll_trap())
1005 return;
1006#endif
1007 if (test_and_clear_bit(__LINK_STATE_XOFF,
1008 &dev->egress_subqueue[queue_index].state))
1009 __netif_schedule(dev);
1010#endif
1011}
1012
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001013/**
1014 * netif_is_multiqueue - test if device has multiple transmit queues
1015 * @dev: network device
1016 *
1017 * Check if device has multiple transmit queues
1018 * Always falls if NETDEVICE_MULTIQUEUE is not configured
1019 */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001020static inline int netif_is_multiqueue(const struct net_device *dev)
1021{
1022#ifdef CONFIG_NETDEVICES_MULTIQUEUE
1023 return (!!(NETIF_F_MULTI_QUEUE & dev->features));
1024#else
1025 return 0;
1026#endif
1027}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028
1029/* Use this variant when it is known for sure that it
1030 * is executing from interrupt context.
1031 */
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001032extern void dev_kfree_skb_irq(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033
1034/* Use this variant in places where it could be invoked
1035 * either from interrupt or non-interrupt context.
1036 */
Denis Vlasenko56079432006-03-29 15:57:29 -08001037extern void dev_kfree_skb_any(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038
1039#define HAVE_NETIF_RX 1
1040extern int netif_rx(struct sk_buff *skb);
1041extern int netif_rx_ni(struct sk_buff *skb);
1042#define HAVE_NETIF_RECEIVE_SKB 1
1043extern int netif_receive_skb(struct sk_buff *skb);
Mitch Williamsc2373ee2005-11-09 10:34:45 -08001044extern int dev_valid_name(const char *name);
Eric W. Biederman881d9662007-09-17 11:56:21 -07001045extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1046extern int dev_ethtool(struct net *net, struct ifreq *);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047extern unsigned dev_get_flags(const struct net_device *);
1048extern int dev_change_flags(struct net_device *, unsigned);
1049extern int dev_change_name(struct net_device *, char *);
Eric W. Biedermance286d32007-09-12 13:53:49 +02001050extern int dev_change_net_namespace(struct net_device *,
1051 struct net *, const char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052extern int dev_set_mtu(struct net_device *, int);
1053extern int dev_set_mac_address(struct net_device *,
1054 struct sockaddr *);
Herbert Xuf6a78bf2006-06-22 02:57:17 -07001055extern int dev_hard_start_xmit(struct sk_buff *skb,
1056 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001058extern int netdev_budget;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059
1060/* Called by rtnetlink.c:rtnl_unlock() */
1061extern void netdev_run_todo(void);
1062
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001063/**
1064 * dev_put - release reference to device
1065 * @dev: network device
1066 *
Benjamin Thery9ef44292007-10-10 21:18:17 -07001067 * Release reference to device to allow it to be freed.
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001068 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069static inline void dev_put(struct net_device *dev)
1070{
1071 atomic_dec(&dev->refcnt);
1072}
1073
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001074/**
1075 * dev_hold - get reference to device
1076 * @dev: network device
1077 *
Benjamin Thery9ef44292007-10-10 21:18:17 -07001078 * Hold reference to device to keep it from being freed.
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001079 */
Stephen Hemminger15333062006-03-20 22:32:28 -08001080static inline void dev_hold(struct net_device *dev)
1081{
1082 atomic_inc(&dev->refcnt);
1083}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084
1085/* Carrier loss detection, dial on demand. The functions netif_carrier_on
1086 * and _off may be called from IRQ context, but it is caller
1087 * who is responsible for serialization of these calls.
Stefan Rompfb00055a2006-03-20 17:09:11 -08001088 *
1089 * The name carrier is inappropriate, these functions should really be
1090 * called netif_lowerlayer_*() because they represent the state of any
1091 * kind of lower layer not just hardware media.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 */
1093
1094extern void linkwatch_fire_event(struct net_device *dev);
1095
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001096/**
1097 * netif_carrier_ok - test if carrier present
1098 * @dev: network device
1099 *
1100 * Check if carrier is present on device
1101 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102static inline int netif_carrier_ok(const struct net_device *dev)
1103{
1104 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1105}
1106
1107extern void __netdev_watchdog_up(struct net_device *dev);
1108
Denis Vlasenko0a242ef2005-08-11 15:32:53 -07001109extern void netif_carrier_on(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110
Denis Vlasenko0a242ef2005-08-11 15:32:53 -07001111extern void netif_carrier_off(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001113/**
1114 * netif_dormant_on - mark device as dormant.
1115 * @dev: network device
1116 *
1117 * Mark device as dormant (as per RFC2863).
1118 *
1119 * The dormant state indicates that the relevant interface is not
1120 * actually in a condition to pass packets (i.e., it is not 'up') but is
1121 * in a "pending" state, waiting for some external event. For "on-
1122 * demand" interfaces, this new state identifies the situation where the
1123 * interface is waiting for events to place it in the up state.
1124 *
1125 */
Stefan Rompfb00055a2006-03-20 17:09:11 -08001126static inline void netif_dormant_on(struct net_device *dev)
1127{
1128 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1129 linkwatch_fire_event(dev);
1130}
1131
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001132/**
1133 * netif_dormant_off - set device as not dormant.
1134 * @dev: network device
1135 *
1136 * Device is not in dormant state.
1137 */
Stefan Rompfb00055a2006-03-20 17:09:11 -08001138static inline void netif_dormant_off(struct net_device *dev)
1139{
1140 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1141 linkwatch_fire_event(dev);
1142}
1143
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001144/**
1145 * netif_dormant - test if carrier present
1146 * @dev: network device
1147 *
1148 * Check if carrier is present on device
1149 */
Stefan Rompfb00055a2006-03-20 17:09:11 -08001150static inline int netif_dormant(const struct net_device *dev)
1151{
1152 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1153}
1154
1155
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001156/**
1157 * netif_oper_up - test if device is operational
1158 * @dev: network device
1159 *
1160 * Check if carrier is operational
1161 */
Stefan Rompfb00055a2006-03-20 17:09:11 -08001162static inline int netif_oper_up(const struct net_device *dev) {
1163 return (dev->operstate == IF_OPER_UP ||
1164 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1165}
1166
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001167/**
1168 * netif_device_present - is device available or removed
1169 * @dev: network device
1170 *
1171 * Check if device has not been removed from system.
1172 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173static inline int netif_device_present(struct net_device *dev)
1174{
1175 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1176}
1177
Denis Vlasenko56079432006-03-29 15:57:29 -08001178extern void netif_device_detach(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179
Denis Vlasenko56079432006-03-29 15:57:29 -08001180extern void netif_device_attach(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181
1182/*
1183 * Network interface message level settings
1184 */
1185#define HAVE_NETIF_MSG 1
1186
1187enum {
1188 NETIF_MSG_DRV = 0x0001,
1189 NETIF_MSG_PROBE = 0x0002,
1190 NETIF_MSG_LINK = 0x0004,
1191 NETIF_MSG_TIMER = 0x0008,
1192 NETIF_MSG_IFDOWN = 0x0010,
1193 NETIF_MSG_IFUP = 0x0020,
1194 NETIF_MSG_RX_ERR = 0x0040,
1195 NETIF_MSG_TX_ERR = 0x0080,
1196 NETIF_MSG_TX_QUEUED = 0x0100,
1197 NETIF_MSG_INTR = 0x0200,
1198 NETIF_MSG_TX_DONE = 0x0400,
1199 NETIF_MSG_RX_STATUS = 0x0800,
1200 NETIF_MSG_PKTDATA = 0x1000,
1201 NETIF_MSG_HW = 0x2000,
1202 NETIF_MSG_WOL = 0x4000,
1203};
1204
1205#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1206#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1207#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1208#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1209#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1210#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1211#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1212#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1213#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1214#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1215#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1216#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1217#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1218#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1219#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1220
1221static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1222{
1223 /* use default */
1224 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1225 return default_msg_enable_bits;
1226 if (debug_value == 0) /* no output */
1227 return 0;
1228 /* set low N bits */
1229 return (1 << debug_value) - 1;
1230}
1231
shemminger@osdl.org0a122572005-11-30 11:45:17 -08001232/* Test if receive needs to be scheduled but only if up */
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001233static inline int netif_rx_schedule_prep(struct net_device *dev,
1234 struct napi_struct *napi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235{
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001236 return netif_running(dev) && napi_schedule_prep(napi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237}
1238
1239/* Add interface to tail of rx poll list. This assumes that _prep has
1240 * already been called and returned 1.
1241 */
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001242static inline void __netif_rx_schedule(struct net_device *dev,
1243 struct napi_struct *napi)
1244{
1245 dev_hold(dev);
1246 __napi_schedule(napi);
1247}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248
1249/* Try to reschedule poll. Called by irq handler. */
1250
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001251static inline void netif_rx_schedule(struct net_device *dev,
1252 struct napi_struct *napi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253{
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001254 if (netif_rx_schedule_prep(dev, napi))
1255 __netif_rx_schedule(dev, napi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256}
1257
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001258/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
1259static inline int netif_rx_reschedule(struct net_device *dev,
1260 struct napi_struct *napi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261{
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001262 if (napi_schedule_prep(napi)) {
1263 __netif_rx_schedule(dev, napi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 return 1;
1265 }
1266 return 0;
1267}
1268
Herbert Xub0ba6662007-05-29 13:22:52 -07001269/* same as netif_rx_complete, except that local_irq_save(flags)
1270 * has already been issued
1271 */
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001272static inline void __netif_rx_complete(struct net_device *dev,
1273 struct napi_struct *napi)
Herbert Xub0ba6662007-05-29 13:22:52 -07001274{
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001275 __napi_complete(napi);
1276 dev_put(dev);
Herbert Xub0ba6662007-05-29 13:22:52 -07001277}
1278
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279/* Remove interface from poll list: it must be in the poll list
1280 * on current cpu. This primitive is called by dev->poll(), when
1281 * it completes the work. The device cannot be out of poll list at this
1282 * moment, it is BUG().
1283 */
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001284static inline void netif_rx_complete(struct net_device *dev,
1285 struct napi_struct *napi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286{
1287 unsigned long flags;
1288
1289 local_irq_save(flags);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001290 __netif_rx_complete(dev, napi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 local_irq_restore(flags);
1292}
1293
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001294/**
1295 * netif_tx_lock - grab network device transmit lock
1296 * @dev: network device
1297 *
1298 * Get network device transmit lock
1299 */
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07001300static inline void __netif_tx_lock(struct net_device *dev, int cpu)
Herbert Xu932ff272006-06-09 12:20:56 -07001301{
1302 spin_lock(&dev->_xmit_lock);
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07001303 dev->xmit_lock_owner = cpu;
1304}
1305
1306static inline void netif_tx_lock(struct net_device *dev)
1307{
1308 __netif_tx_lock(dev, smp_processor_id());
Herbert Xu932ff272006-06-09 12:20:56 -07001309}
1310
1311static inline void netif_tx_lock_bh(struct net_device *dev)
1312{
1313 spin_lock_bh(&dev->_xmit_lock);
1314 dev->xmit_lock_owner = smp_processor_id();
1315}
1316
1317static inline int netif_tx_trylock(struct net_device *dev)
1318{
Herbert Xu53c4b2c2006-07-21 14:55:38 -07001319 int ok = spin_trylock(&dev->_xmit_lock);
1320 if (likely(ok))
Herbert Xu932ff272006-06-09 12:20:56 -07001321 dev->xmit_lock_owner = smp_processor_id();
Herbert Xu53c4b2c2006-07-21 14:55:38 -07001322 return ok;
Herbert Xu932ff272006-06-09 12:20:56 -07001323}
1324
1325static inline void netif_tx_unlock(struct net_device *dev)
1326{
1327 dev->xmit_lock_owner = -1;
1328 spin_unlock(&dev->_xmit_lock);
1329}
1330
1331static inline void netif_tx_unlock_bh(struct net_device *dev)
1332{
1333 dev->xmit_lock_owner = -1;
1334 spin_unlock_bh(&dev->_xmit_lock);
1335}
1336
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07001337#define HARD_TX_LOCK(dev, cpu) { \
1338 if ((dev->features & NETIF_F_LLTX) == 0) { \
1339 __netif_tx_lock(dev, cpu); \
1340 } \
1341}
1342
1343#define HARD_TX_UNLOCK(dev) { \
1344 if ((dev->features & NETIF_F_LLTX) == 0) { \
1345 netif_tx_unlock(dev); \
1346 } \
1347}
1348
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349static inline void netif_tx_disable(struct net_device *dev)
1350{
Herbert Xu932ff272006-06-09 12:20:56 -07001351 netif_tx_lock_bh(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352 netif_stop_queue(dev);
Herbert Xu932ff272006-06-09 12:20:56 -07001353 netif_tx_unlock_bh(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354}
1355
1356/* These functions live elsewhere (drivers/net/net_init.c, but related) */
1357
1358extern void ether_setup(struct net_device *dev);
1359
1360/* Support for loadable net-drivers */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001361extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1362 void (*setup)(struct net_device *),
1363 unsigned int queue_count);
1364#define alloc_netdev(sizeof_priv, name, setup) \
1365 alloc_netdev_mq(sizeof_priv, name, setup, 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366extern int register_netdev(struct net_device *dev);
1367extern void unregister_netdev(struct net_device *dev);
Patrick McHardy4417da62007-06-27 01:28:10 -07001368/* Functions used for secondary unicast and multicast support */
1369extern void dev_set_rx_mode(struct net_device *dev);
1370extern void __dev_set_rx_mode(struct net_device *dev);
1371extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1372extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1374extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
Patrick McHardya0a400d2007-07-14 18:52:02 -07001375extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1376extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
Patrick McHardy61cbc2f2007-06-30 13:35:52 -07001377extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1378extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379extern void dev_set_promiscuity(struct net_device *dev, int inc);
1380extern void dev_set_allmulti(struct net_device *dev, int inc);
1381extern void netdev_state_change(struct net_device *dev);
Stephen Hemmingerd8a33ac2005-05-29 14:13:47 -07001382extern void netdev_features_change(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383/* Load a device via the kmod */
Eric W. Biederman881d9662007-09-17 11:56:21 -07001384extern void dev_load(struct net *net, const char *name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385extern void dev_mcast_init(void);
1386extern int netdev_max_backlog;
1387extern int weight_p;
1388extern int netdev_set_master(struct net_device *dev, struct net_device *master);
Patrick McHardy84fa7932006-08-29 16:44:56 -07001389extern int skb_checksum_help(struct sk_buff *skb);
Herbert Xu576a30e2006-06-27 13:22:38 -07001390extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
Herbert Xufb286bb2005-11-10 13:01:24 -08001391#ifdef CONFIG_BUG
1392extern void netdev_rx_csum_fault(struct net_device *dev);
1393#else
1394static inline void netdev_rx_csum_fault(struct net_device *dev)
1395{
1396}
1397#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398/* rx skb timestamps */
1399extern void net_enable_timestamp(void);
1400extern void net_disable_timestamp(void);
1401
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001402#ifdef CONFIG_PROC_FS
1403extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1404extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1405extern void dev_seq_stop(struct seq_file *seq, void *v);
1406#endif
1407
1408extern void linkwatch_run_queue(void);
1409
Herbert Xu7f353bf2007-08-10 15:47:58 -07001410extern int netdev_compute_features(unsigned long all, unsigned long one);
1411
Herbert Xubcd76112006-06-30 13:36:35 -07001412static inline int net_gso_ok(int features, int gso_type)
1413{
1414 int feature = gso_type << NETIF_F_GSO_SHIFT;
1415 return (features & feature) == feature;
1416}
1417
Herbert Xu576a30e2006-06-27 13:22:38 -07001418static inline int skb_gso_ok(struct sk_buff *skb, int features)
1419{
Herbert Xua430a432006-07-08 13:34:56 -07001420 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
Herbert Xu576a30e2006-06-27 13:22:38 -07001421}
1422
Herbert Xu79671682006-06-22 02:40:14 -07001423static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1424{
Herbert Xua430a432006-07-08 13:34:56 -07001425 return skb_is_gso(skb) &&
1426 (!skb_gso_ok(skb, dev->features) ||
Patrick McHardy84fa7932006-08-29 16:44:56 -07001427 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
Herbert Xu79671682006-06-22 02:40:14 -07001428}
1429
David S. Miller7ea49ed2006-08-14 17:08:36 -07001430/* On bonding slaves other than the currently active slave, suppress
Jay Vosburghf5b2b962006-09-22 21:54:53 -07001431 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1432 * ARP on active-backup slaves with arp_validate enabled.
David S. Miller7ea49ed2006-08-14 17:08:36 -07001433 */
1434static inline int skb_bond_should_drop(struct sk_buff *skb)
1435{
1436 struct net_device *dev = skb->dev;
1437 struct net_device *master = dev->master;
1438
1439 if (master &&
1440 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
Jay Vosburghf5b2b962006-09-22 21:54:53 -07001441 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1442 skb->protocol == __constant_htons(ETH_P_ARP))
1443 return 0;
1444
David S. Miller7ea49ed2006-08-14 17:08:36 -07001445 if (master->priv_flags & IFF_MASTER_ALB) {
1446 if (skb->pkt_type != PACKET_BROADCAST &&
1447 skb->pkt_type != PACKET_MULTICAST)
1448 return 0;
1449 }
1450 if (master->priv_flags & IFF_MASTER_8023AD &&
1451 skb->protocol == __constant_htons(ETH_P_SLOW))
1452 return 0;
1453
1454 return 1;
1455 }
1456 return 0;
1457}
1458
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459#endif /* __KERNEL__ */
1460
1461#endif /* _LINUX_DEV_H */