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[net-next-2.6.git] / include / linux / netdevice.h
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1da177e4
LT		 1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Definitions for the Interfaces handler.
7 *
8 * Version: @(#)dev.h 1.0.10 08/12/93
9 *
02c30a84 10 * Authors: Ross Biro
1da177e4
LT		 11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
113aa838 14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
1da177e4
LT		 15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
17 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
22 *
23 * Moved to /usr/include/linux for NET3
24 */
25#ifndef _LINUX_NETDEVICE_H
26#define _LINUX_NETDEVICE_H
27
28#include <linux/if.h>
29#include <linux/if_ether.h>
30#include <linux/if_packet.h>
31
32#ifdef __KERNEL__
d7fe0f24 33#include <linux/timer.h>
bea3348e 34#include <linux/delay.h>
cc0be322 35#include <linux/mm.h>
1da177e4
LT		 36#include <asm/atomic.h>
37#include <asm/cache.h>
38#include <asm/byteorder.h>
39
1da177e4
LT		 40#include <linux/device.h>
41#include <linux/percpu.h>
db217334 42#include <linux/dmaengine.h>
bea3348e 43#include <linux/workqueue.h>
1da177e4 44
b1b67dd4 45#include <linux/ethtool.h>
a050c33f 46#include <net/net_namespace.h>
cf85d08f 47#include <net/dsa.h>
7a6b6f51 48#ifdef CONFIG_DCB
2f90b865
AD		 49#include <net/dcbnl.h>
50#endif
a050c33f 51
1da177e4 52struct vlan_group;
115c1d6e 53struct netpoll_info;
704232c2
JB		 54/* 802.11 specific */
55struct wireless_dev;
1da177e4
LT		 56 /* source back-compat hooks */
57#define SET_ETHTOOL_OPS(netdev,ops) \
58 ( (netdev)->ethtool_ops = (ops) )
59
60#define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
61 functions are available. */
62#define HAVE_FREE_NETDEV /* free_netdev() */
63#define HAVE_NETDEV_PRIV /* netdev_priv() */
64
65#define NET_XMIT_SUCCESS 0
66#define NET_XMIT_DROP 1 /* skb dropped */
67#define NET_XMIT_CN 2 /* congestion notification */
68#define NET_XMIT_POLICED 3 /* skb is shot by police */
378a2f09 69#define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */
1da177e4
LT		 70
71/* Backlog congestion levels */
72#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
73#define NET_RX_DROP 1 /* packet dropped */
74#define NET_RX_CN_LOW 2 /* storm alert, just in case */
75#define NET_RX_CN_MOD 3 /* Storm on its way! */
76#define NET_RX_CN_HIGH 4 /* The storm is here */
77#define NET_RX_BAD 5 /* packet dropped due to kernel error */
78
b9df3cb8
GR		 79/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
80 * indicates that the device will soon be dropping packets, or already drops
81 * some packets of the same priority; prompting us to send less aggressively. */
82#define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
1da177e4
LT		 83#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
84
85#endif
86
87#define MAX_ADDR_LEN 32 /* Largest hardware address length */
88
89/* Driver transmit return codes */
90#define NETDEV_TX_OK 0 /* driver took care of packet */
91#define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
92#define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
93
c88e6f51
AB		 94#ifdef __KERNEL__
95
1da177e4
LT		 96/*
97 * Compute the worst case header length according to the protocols
98 * used.
99 */
fe2918b0 100
8388e3da
DM		 101#if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
102# if defined(CONFIG_MAC80211_MESH)
103# define LL_MAX_HEADER 128
104# else
105# define LL_MAX_HEADER 96
106# endif
c759a6b4 107#elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
8388e3da 108# define LL_MAX_HEADER 48
1da177e4 109#else
8388e3da 110# define LL_MAX_HEADER 32
1da177e4
LT		 111#endif
112
e81c7359
DM		 113#if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
114 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
115 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
116 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
1da177e4
LT		 117#define MAX_HEADER LL_MAX_HEADER
118#else
119#define MAX_HEADER (LL_MAX_HEADER + 48)
120#endif
121
c88e6f51
AB		 122#endif /* __KERNEL__ */
123
1da177e4
LT		 124/*
125 * Network device statistics. Akin to the 2.0 ether stats but
126 * with byte counters.
127 */
fe2918b0 128
1da177e4
LT		 129struct net_device_stats
130{
131 unsigned long rx_packets; /* total packets received */
132 unsigned long tx_packets; /* total packets transmitted */
133 unsigned long rx_bytes; /* total bytes received */
134 unsigned long tx_bytes; /* total bytes transmitted */
135 unsigned long rx_errors; /* bad packets received */
136 unsigned long tx_errors; /* packet transmit problems */
137 unsigned long rx_dropped; /* no space in linux buffers */
138 unsigned long tx_dropped; /* no space available in linux */
139 unsigned long multicast; /* multicast packets received */
140 unsigned long collisions;
141
142 /* detailed rx_errors: */
143 unsigned long rx_length_errors;
144 unsigned long rx_over_errors; /* receiver ring buff overflow */
145 unsigned long rx_crc_errors; /* recved pkt with crc error */
146 unsigned long rx_frame_errors; /* recv'd frame alignment error */
147 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
148 unsigned long rx_missed_errors; /* receiver missed packet */
149
150 /* detailed tx_errors */
151 unsigned long tx_aborted_errors;
152 unsigned long tx_carrier_errors;
153 unsigned long tx_fifo_errors;
154 unsigned long tx_heartbeat_errors;
155 unsigned long tx_window_errors;
156
157 /* for cslip etc */
158 unsigned long rx_compressed;
159 unsigned long tx_compressed;
160};
161
162
163/* Media selection options. */
164enum {
165 IF_PORT_UNKNOWN = 0,
166 IF_PORT_10BASE2,
167 IF_PORT_10BASET,
168 IF_PORT_AUI,
169 IF_PORT_100BASET,
170 IF_PORT_100BASETX,
171 IF_PORT_100BASEFX
172};
173
174#ifdef __KERNEL__
175
176#include <linux/cache.h>
177#include <linux/skbuff.h>
178
179struct neighbour;
180struct neigh_parms;
181struct sk_buff;
182
183struct netif_rx_stats
184{
185 unsigned total;
186 unsigned dropped;
187 unsigned time_squeeze;
1da177e4
LT		 188 unsigned cpu_collision;
189};
190
191DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
192
bf742482
PM		 193struct dev_addr_list
194{
195 struct dev_addr_list *next;
196 u8 da_addr[MAX_ADDR_LEN];
197 u8 da_addrlen;
a0a400d7 198 u8 da_synced;
bf742482
PM		 199 int da_users;
200 int da_gusers;
201};
1da177e4
LT		 202
203/*
204 * We tag multicasts with these structures.
205 */
3fba5a8b
PM		 206
207#define dev_mc_list dev_addr_list
208#define dmi_addr da_addr
209#define dmi_addrlen da_addrlen
210#define dmi_users da_users
211#define dmi_gusers da_gusers
1da177e4
LT		 212
213struct hh_cache
214{
215 struct hh_cache *hh_next; /* Next entry */
216 atomic_t hh_refcnt; /* number of users */
f0490980
ED		 217/*
218 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
219 * cache line on SMP.
220 * They are mostly read, but hh_refcnt may be changed quite frequently,
221 * incurring cache line ping pongs.
222 */
223 __be16 hh_type ____cacheline_aligned_in_smp;
224 /* protocol identifier, f.e ETH_P_IP
1da177e4
LT		 225 * NOTE: For VLANs, this will be the
226 * encapuslated type. --BLG
227 */
d5c42c0e 228 u16 hh_len; /* length of header */
1da177e4 229 int (*hh_output)(struct sk_buff *skb);
3644f0ce 230 seqlock_t hh_lock;
1da177e4
LT		 231
232 /* cached hardware header; allow for machine alignment needs. */
233#define HH_DATA_MOD 16
234#define HH_DATA_OFF(__len) \
5ba0eac6 235 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
1da177e4
LT		 236#define HH_DATA_ALIGN(__len) \
237 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
238 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
239};
240
241/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
242 * Alternative is:
243 * dev->hard_header_len ? (dev->hard_header_len +
244 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
245 *
246 * We could use other alignment values, but we must maintain the
247 * relationship HH alignment <= LL alignment.
f5184d26
JB		 248 *
249 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
250 * may need.
1da177e4
LT		 251 */
252#define LL_RESERVED_SPACE(dev) \
f5184d26 253 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
1da177e4 254#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
f5184d26
JB		 255 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
256#define LL_ALLOCATED_SPACE(dev) \
257 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
1da177e4 258
3b04ddde
SH		 259struct header_ops {
260 int (*create) (struct sk_buff *skb, struct net_device *dev,
261 unsigned short type, const void *daddr,
262 const void *saddr, unsigned len);
263 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
264 int (*rebuild)(struct sk_buff *skb);
265#define HAVE_HEADER_CACHE
266 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
267 void (*cache_update)(struct hh_cache *hh,
268 const struct net_device *dev,
269 const unsigned char *haddr);
270};
271
1da177e4
LT		 272/* These flag bits are private to the generic network queueing
273 * layer, they may not be explicitly referenced by any other
274 * code.
275 */
276
277enum netdev_state_t
278{
1da177e4
LT		 279 __LINK_STATE_START,
280 __LINK_STATE_PRESENT,
1da177e4 281 __LINK_STATE_NOCARRIER,
b00055aa
SR		 282 __LINK_STATE_LINKWATCH_PENDING,
283 __LINK_STATE_DORMANT,
1da177e4
LT		 284};
285
286
287/*
288 * This structure holds at boot time configured netdevice settings. They
fe2918b0 289 * are then used in the device probing.
1da177e4
LT		 290 */
291struct netdev_boot_setup {
292 char name[IFNAMSIZ];
293 struct ifmap map;
294};
295#define NETDEV_BOOT_SETUP_MAX 8
296
20380731 297extern int __init netdev_boot_setup(char *str);
1da177e4 298
bea3348e
SH		 299/*
300 * Structure for NAPI scheduling similar to tasklet but with weighting
301 */
302struct napi_struct {
303 /* The poll_list must only be managed by the entity which
304 * changes the state of the NAPI_STATE_SCHED bit. This means
305 * whoever atomically sets that bit can add this napi_struct
306 * to the per-cpu poll_list, and whoever clears that bit
307 * can remove from the list right before clearing the bit.
308 */
309 struct list_head poll_list;
310
311 unsigned long state;
312 int weight;
313 int (*poll)(struct napi_struct *, int);
314#ifdef CONFIG_NETPOLL
315 spinlock_t poll_lock;
316 int poll_owner;
bea3348e 317#endif
4ae5544f
HX		 318
319 unsigned int gro_count;
320
5d38a079 321 struct net_device *dev;
d565b0a1
HX		 322 struct list_head dev_list;
323 struct sk_buff *gro_list;
5d38a079 324 struct sk_buff *skb;
bea3348e
SH		 325};
326
327enum
328{
329 NAPI_STATE_SCHED, /* Poll is scheduled */
a0a46196 330 NAPI_STATE_DISABLE, /* Disable pending */
7b363e44 331 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
bea3348e
SH		 332};
333
d1c76af9
HX		 334enum {
335 GRO_MERGED,
336 GRO_MERGED_FREE,
337 GRO_HELD,
338 GRO_NORMAL,
339 GRO_DROP,
340};
341
b3c97528 342extern void __napi_schedule(struct napi_struct *n);
bea3348e 343
a0a46196
DM		 344static inline int napi_disable_pending(struct napi_struct *n)
345{
346 return test_bit(NAPI_STATE_DISABLE, &n->state);
347}
348
bea3348e
SH		 349/**
350 * napi_schedule_prep - check if napi can be scheduled
351 * @n: napi context
352 *
353 * Test if NAPI routine is already running, and if not mark
354 * it as running. This is used as a condition variable
a0a46196
DM		 355 * insure only one NAPI poll instance runs. We also make
356 * sure there is no pending NAPI disable.
bea3348e
SH		 357 */
358static inline int napi_schedule_prep(struct napi_struct *n)
359{
a0a46196
DM		 360 return !napi_disable_pending(n) &&
361 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
bea3348e
SH		 362}
363
364/**
365 * napi_schedule - schedule NAPI poll
366 * @n: napi context
367 *
368 * Schedule NAPI poll routine to be called if it is not already
369 * running.
370 */
371static inline void napi_schedule(struct napi_struct *n)
372{
373 if (napi_schedule_prep(n))
374 __napi_schedule(n);
375}
376
bfe13f54
RD		 377/* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
378static inline int napi_reschedule(struct napi_struct *napi)
379{
380 if (napi_schedule_prep(napi)) {
381 __napi_schedule(napi);
382 return 1;
383 }
384 return 0;
385}
386
bea3348e
SH		 387/**
388 * napi_complete - NAPI processing complete
389 * @n: napi context
390 *
391 * Mark NAPI processing as complete.
392 */
d565b0a1
HX		 393extern void __napi_complete(struct napi_struct *n);
394extern void napi_complete(struct napi_struct *n);
bea3348e
SH		 395
396/**
397 * napi_disable - prevent NAPI from scheduling
398 * @n: napi context
399 *
400 * Stop NAPI from being scheduled on this context.
401 * Waits till any outstanding processing completes.
402 */
403static inline void napi_disable(struct napi_struct *n)
404{
a0a46196 405 set_bit(NAPI_STATE_DISABLE, &n->state);
bea3348e 406 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
43cc7380 407 msleep(1);
a0a46196 408 clear_bit(NAPI_STATE_DISABLE, &n->state);
bea3348e
SH		 409}
410
411/**
412 * napi_enable - enable NAPI scheduling
413 * @n: napi context
414 *
415 * Resume NAPI from being scheduled on this context.
416 * Must be paired with napi_disable.
417 */
418static inline void napi_enable(struct napi_struct *n)
419{
420 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
421 smp_mb__before_clear_bit();
422 clear_bit(NAPI_STATE_SCHED, &n->state);
423}
424
c264c3de
SH		 425#ifdef CONFIG_SMP
426/**
427 * napi_synchronize - wait until NAPI is not running
428 * @n: napi context
429 *
430 * Wait until NAPI is done being scheduled on this context.
431 * Waits till any outstanding processing completes but
432 * does not disable future activations.
433 */
434static inline void napi_synchronize(const struct napi_struct *n)
435{
436 while (test_bit(NAPI_STATE_SCHED, &n->state))
437 msleep(1);
438}
439#else
440# define napi_synchronize(n) barrier()
441#endif
442
79d16385
DM		 443enum netdev_queue_state_t
444{
445 __QUEUE_STATE_XOFF,
c3f26a26 446 __QUEUE_STATE_FROZEN,
79d16385
DM		 447};
448
bb949fbd 449struct netdev_queue {
6a321cb3
ED		 450/*
451 * read mostly part
452 */
bb949fbd 453 struct net_device *dev;
b0e1e646 454 struct Qdisc *qdisc;
79d16385 455 unsigned long state;
b0e1e646 456 struct Qdisc *qdisc_sleeping;
6a321cb3
ED		 457/*
458 * write mostly part
459 */
460 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
461 int xmit_lock_owner;
e8a0464c 462} ____cacheline_aligned_in_smp;
bb949fbd 463
d314774c
SH		 464
465/*
466 * This structure defines the management hooks for network devices.
00829823
SH		 467 * The following hooks can be defined; unless noted otherwise, they are
468 * optional and can be filled with a null pointer.
d314774c
SH		 469 *
470 * int (*ndo_init)(struct net_device *dev);
471 * This function is called once when network device is registered.
472 * The network device can use this to any late stage initializaton
473 * or semantic validattion. It can fail with an error code which will
474 * be propogated back to register_netdev
475 *
476 * void (*ndo_uninit)(struct net_device *dev);
477 * This function is called when device is unregistered or when registration
478 * fails. It is not called if init fails.
479 *
480 * int (*ndo_open)(struct net_device *dev);
481 * This function is called when network device transistions to the up
482 * state.
483 *
484 * int (*ndo_stop)(struct net_device *dev);
485 * This function is called when network device transistions to the down
486 * state.
487 *
985ebdb5 488 * int (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev);
00829823
SH		 489 * Called when a packet needs to be transmitted.
490 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED,
491 * Required can not be NULL.
492 *
493 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
494 * Called to decide which queue to when device supports multiple
495 * transmit queues.
496 *
d314774c
SH		 497 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
498 * This function is called to allow device receiver to make
499 * changes to configuration when multicast or promiscious is enabled.
500 *
501 * void (*ndo_set_rx_mode)(struct net_device *dev);
502 * This function is called device changes address list filtering.
503 *
504 * void (*ndo_set_multicast_list)(struct net_device *dev);
505 * This function is called when the multicast address list changes.
506 *
507 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
508 * This function is called when the Media Access Control address
37b607c5 509 * needs to be changed. If this interface is not defined, the
d314774c
SH		 510 * mac address can not be changed.
511 *
512 * int (*ndo_validate_addr)(struct net_device *dev);
513 * Test if Media Access Control address is valid for the device.
514 *
515 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
516 * Called when a user request an ioctl which can't be handled by
517 * the generic interface code. If not defined ioctl's return
518 * not supported error code.
519 *
520 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
521 * Used to set network devices bus interface parameters. This interface
522 * is retained for legacy reason, new devices should use the bus
523 * interface (PCI) for low level management.
524 *
525 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
526 * Called when a user wants to change the Maximum Transfer Unit
527 * of a device. If not defined, any request to change MTU will
528 * will return an error.
529 *
00829823 530 * void (*ndo_tx_timeout)(struct net_device *dev);
d314774c
SH		 531 * Callback uses when the transmitter has not made any progress
532 * for dev->watchdog ticks.
533 *
534 * struct net_device_stats* (*get_stats)(struct net_device *dev);
535 * Called when a user wants to get the network device usage
536 * statistics. If not defined, the counters in dev->stats will
537 * be used.
538 *
539 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
540 * If device support VLAN receive accleration
541 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
542 * when vlan groups for the device changes. Note: grp is NULL
543 * if no vlan's groups are being used.
544 *
545 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
546 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
547 * this function is called when a VLAN id is registered.
548 *
549 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
550 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
551 * this function is called when a VLAN id is unregistered.
552 *
553 * void (*ndo_poll_controller)(struct net_device *dev);
554 */
47fd5b83 555#define HAVE_NET_DEVICE_OPS
d314774c
SH		 556struct net_device_ops {
557 int (*ndo_init)(struct net_device *dev);
558 void (*ndo_uninit)(struct net_device *dev);
559 int (*ndo_open)(struct net_device *dev);
560 int (*ndo_stop)(struct net_device *dev);
00829823
SH		 561 int (*ndo_start_xmit) (struct sk_buff *skb,
562 struct net_device *dev);
563 u16 (*ndo_select_queue)(struct net_device *dev,
564 struct sk_buff *skb);
d314774c
SH		 565#define HAVE_CHANGE_RX_FLAGS
566 void (*ndo_change_rx_flags)(struct net_device *dev,
567 int flags);
568#define HAVE_SET_RX_MODE
569 void (*ndo_set_rx_mode)(struct net_device *dev);
570#define HAVE_MULTICAST
571 void (*ndo_set_multicast_list)(struct net_device *dev);
572#define HAVE_SET_MAC_ADDR
573 int (*ndo_set_mac_address)(struct net_device *dev,
574 void *addr);
575#define HAVE_VALIDATE_ADDR
576 int (*ndo_validate_addr)(struct net_device *dev);
577#define HAVE_PRIVATE_IOCTL
578 int (*ndo_do_ioctl)(struct net_device *dev,
579 struct ifreq *ifr, int cmd);
580#define HAVE_SET_CONFIG
581 int (*ndo_set_config)(struct net_device *dev,
582 struct ifmap *map);
583#define HAVE_CHANGE_MTU
00829823
SH		 584 int (*ndo_change_mtu)(struct net_device *dev,
585 int new_mtu);
586 int (*ndo_neigh_setup)(struct net_device *dev,
587 struct neigh_parms *);
d314774c
SH		 588#define HAVE_TX_TIMEOUT
589 void (*ndo_tx_timeout) (struct net_device *dev);
590
591 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
592
593 void (*ndo_vlan_rx_register)(struct net_device *dev,
594 struct vlan_group *grp);
595 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
596 unsigned short vid);
597 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
598 unsigned short vid);
599#ifdef CONFIG_NET_POLL_CONTROLLER
600#define HAVE_NETDEV_POLL
601 void (*ndo_poll_controller)(struct net_device *dev);
602#endif
4d288d57
YZ		 603#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
604 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
605 u16 xid,
606 struct scatterlist *sgl,
607 unsigned int sgc);
608 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
609 u16 xid);
610#endif
d314774c
SH		 611};
612
1da177e4
LT		 613/*
614 * The DEVICE structure.
615 * Actually, this whole structure is a big mistake. It mixes I/O
616 * data with strictly "high-level" data, and it has to know about
617 * almost every data structure used in the INET module.
618 *
619 * FIXME: cleanup struct net_device such that network protocol info
620 * moves out.
621 */
622
623struct net_device
624{
625
626 /*
627 * This is the first field of the "visible" part of this structure
628 * (i.e. as seen by users in the "Space.c" file). It is the name
629 * the interface.
630 */
631 char name[IFNAMSIZ];
9356b8fc
ED		 632 /* device name hash chain */
633 struct hlist_node name_hlist;
0b815a1a
SH		 634 /* snmp alias */
635 char *ifalias;
1da177e4
LT		 636
637 /*
638 * I/O specific fields
639 * FIXME: Merge these and struct ifmap into one
640 */
641 unsigned long mem_end; /* shared mem end */
642 unsigned long mem_start; /* shared mem start */
643 unsigned long base_addr; /* device I/O address */
644 unsigned int irq; /* device IRQ number */
645
646 /*
647 * Some hardware also needs these fields, but they are not
648 * part of the usual set specified in Space.c.
649 */
650
651 unsigned char if_port; /* Selectable AUI, TP,..*/
652 unsigned char dma; /* DMA channel */
653
654 unsigned long state;
655
7562f876 656 struct list_head dev_list;
bea3348e 657 struct list_head napi_list;
1da177e4 658
9356b8fc
ED		 659 /* Net device features */
660 unsigned long features;
661#define NETIF_F_SG 1 /* Scatter/gather IO. */
d212f87b 662#define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
9356b8fc
ED		 663#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
664#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
d212f87b 665#define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
9356b8fc
ED		 666#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
667#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
668#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
669#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
670#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
671#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
37c3185a 672#define NETIF_F_GSO 2048 /* Enable software GSO. */
e24eb521
CB		 673#define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
674 /* do not use LLTX in new drivers */
ce286d32 675#define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
d565b0a1 676#define NETIF_F_GRO 16384 /* Generic receive offload */
3ae7c0b2 677#define NETIF_F_LRO 32768 /* large receive offload */
7967168c 678
8dc92f7e 679/* the GSO_MASK reserves bits 16 through 23 */
01d5b2fc 680#define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
8dc92f7e 681#define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
01d5b2fc 682
7967168c 683 /* Segmentation offload features */
289c79a4 684#define NETIF_F_GSO_SHIFT 16
43eb99c5 685#define NETIF_F_GSO_MASK 0x00ff0000
7967168c 686#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
f83ef8c0 687#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
576a30eb 688#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
f83ef8c0
HX		 689#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
690#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
01d5b2fc 691#define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
9356b8fc 692
78eb8877
HX		 693 /* List of features with software fallbacks. */
694#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
695
d212f87b 696
8648b305 697#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
d212f87b
SH		 698#define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
699#define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
700#define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
8648b305 701
b63365a2
HX		 702 /*
703 * If one device supports one of these features, then enable them
704 * for all in netdev_increment_features.
705 */
706#define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
d314774c 707 NETIF_F_SG | NETIF_F_HIGHDMA | \
b63365a2
HX		 708 NETIF_F_FRAGLIST)
709
1da177e4
LT		 710 /* Interface index. Unique device identifier */
711 int ifindex;
712 int iflink;
713
c45d286e 714 struct net_device_stats stats;
1da177e4 715
b86e0280 716#ifdef CONFIG_WIRELESS_EXT
1da177e4
LT		 717 /* List of functions to handle Wireless Extensions (instead of ioctl).
718 * See <net/iw_handler.h> for details. Jean II */
719 const struct iw_handler_def * wireless_handlers;
720 /* Instance data managed by the core of Wireless Extensions. */
721 struct iw_public_data * wireless_data;
b86e0280 722#endif
d314774c
SH		 723 /* Management operations */
724 const struct net_device_ops *netdev_ops;
76fd8593 725 const struct ethtool_ops *ethtool_ops;
1da177e4 726
3b04ddde
SH		 727 /* Hardware header description */
728 const struct header_ops *header_ops;
729
b00055aa 730 unsigned int flags; /* interface flags (a la BSD) */
1da177e4
LT		 731 unsigned short gflags;
732 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
733 unsigned short padded; /* How much padding added by alloc_netdev() */
734
b00055aa
SR		 735 unsigned char operstate; /* RFC2863 operstate */
736 unsigned char link_mode; /* mapping policy to operstate */
737
1da177e4
LT		 738 unsigned mtu; /* interface MTU value */
739 unsigned short type; /* interface hardware type */
740 unsigned short hard_header_len; /* hardware hdr length */
1da177e4 741
f5184d26
JB		 742 /* extra head- and tailroom the hardware may need, but not in all cases
743 * can this be guaranteed, especially tailroom. Some cases also use
744 * LL_MAX_HEADER instead to allocate the skb.
745 */
746 unsigned short needed_headroom;
747 unsigned short needed_tailroom;
748
1da177e4
LT		 749 struct net_device *master; /* Pointer to master device of a group,
750 * which this device is member of.
751 */
752
753 /* Interface address info. */
a6f9a705 754 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1da177e4
LT		 755 unsigned char addr_len; /* hardware address length */
756 unsigned short dev_id; /* for shared network cards */
757
f1f28aa3 758 spinlock_t addr_list_lock;
4417da66
PM		 759 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
760 int uc_count; /* Number of installed ucasts */
761 int uc_promisc;
3fba5a8b 762 struct dev_addr_list *mc_list; /* Multicast mac addresses */
1da177e4 763 int mc_count; /* Number of installed mcasts */
9d45abe1
WC		 764 unsigned int promiscuity;
765 unsigned int allmulti;
1da177e4 766
1da177e4
LT		 767
768 /* Protocol specific pointers */
769
91da11f8
LB		 770#ifdef CONFIG_NET_DSA
771 void *dsa_ptr; /* dsa specific data */
772#endif
1da177e4 773 void *atalk_ptr; /* AppleTalk link */
fe2918b0 774 void *ip_ptr; /* IPv4 specific data */
1da177e4
LT		 775 void *dn_ptr; /* DECnet specific data */
776 void *ip6_ptr; /* IPv6 specific data */
777 void *ec_ptr; /* Econet specific data */
778 void *ax25_ptr; /* AX.25 specific data */
704232c2
JB		 779 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
780 assign before registering */
1da177e4 781
9356b8fc
ED		 782/*
783 * Cache line mostly used on receive path (including eth_type_trans())
784 */
9356b8fc
ED		 785 unsigned long last_rx; /* Time of last Rx */
786 /* Interface address info used in eth_type_trans() */
fe2918b0 787 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
d314774c 788 because most packets are unicast) */
9356b8fc
ED		 789
790 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1da177e4 791
bb949fbd 792 struct netdev_queue rx_queue;
e8a0464c
DM		 793
794 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
fd2ea0a7
DM		 795
796 /* Number of TX queues allocated at alloc_netdev_mq() time */
e8a0464c 797 unsigned int num_tx_queues;
fd2ea0a7
DM		 798
799 /* Number of TX queues currently active in device */
800 unsigned int real_num_tx_queues;
801
1da177e4 802 unsigned long tx_queue_len; /* Max frames per queue allowed */
c3f26a26 803 spinlock_t tx_global_lock;
9356b8fc
ED		 804/*
805 * One part is mostly used on xmit path (device)
806 */
9356b8fc
ED		 807 /* These may be needed for future network-power-down code. */
808 unsigned long trans_start; /* Time (in jiffies) of last Tx */
809
810 int watchdog_timeo; /* used by dev_watchdog() */
811 struct timer_list watchdog_timer;
812
1da177e4 813 /* Number of references to this device */
9356b8fc
ED		 814 atomic_t refcnt ____cacheline_aligned_in_smp;
815
1da177e4
LT		 816 /* delayed register/unregister */
817 struct list_head todo_list;
1da177e4
LT		 818 /* device index hash chain */
819 struct hlist_node index_hlist;
820
572a103d
HX		 821 struct net_device *link_watch_next;
822
1da177e4
LT		 823 /* register/unregister state machine */
824 enum { NETREG_UNINITIALIZED=0,
b17a7c17 825 NETREG_REGISTERED, /* completed register_netdevice */
1da177e4
LT		 826 NETREG_UNREGISTERING, /* called unregister_netdevice */
827 NETREG_UNREGISTERED, /* completed unregister todo */
828 NETREG_RELEASED, /* called free_netdev */
937f1ba5 829 NETREG_DUMMY, /* dummy device for NAPI poll */
1da177e4
LT		 830 } reg_state;
831
d314774c
SH		 832 /* Called from unregister, can be used to call free_netdev */
833 void (*destructor)(struct net_device *dev);
1da177e4 834
1da177e4 835#ifdef CONFIG_NETPOLL
115c1d6e 836 struct netpoll_info *npinfo;
1da177e4 837#endif
eae792b7 838
c346dca1 839#ifdef CONFIG_NET_NS
4a1c5371
EB		 840 /* Network namespace this network device is inside */
841 struct net *nd_net;
c346dca1 842#endif
4a1c5371 843
4951704b
DM		 844 /* mid-layer private */
845 void *ml_priv;
846
1da177e4
LT		 847 /* bridge stuff */
848 struct net_bridge_port *br_port;
b863ceb7
PM		 849 /* macvlan */
850 struct macvlan_port *macvlan_port;
eca9ebac
PM		 851 /* GARP */
852 struct garp_port *garp_port;
1da177e4 853
1da177e4 854 /* class/net/name entry */
43cb76d9 855 struct device dev;
fe9925b5
SH		 856 /* space for optional statistics and wireless sysfs groups */
857 struct attribute_group *sysfs_groups[3];
38f7b870
PM		 858
859 /* rtnetlink link ops */
860 const struct rtnl_link_ops *rtnl_link_ops;
f25f4e44 861
289c79a4
PM		 862 /* VLAN feature mask */
863 unsigned long vlan_features;
864
82cc1a7a
PWJ		 865 /* for setting kernel sock attribute on TCP connection setup */
866#define GSO_MAX_SIZE 65536
867 unsigned int gso_max_size;
d314774c 868
7a6b6f51 869#ifdef CONFIG_DCB
2f90b865
AD		 870 /* Data Center Bridging netlink ops */
871 struct dcbnl_rtnl_ops *dcbnl_ops;
872#endif
873
4d288d57
YZ		 874#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
875 /* max exchange id for FCoE LRO by ddp */
876 unsigned int fcoe_ddp_xid;
877#endif
878
d314774c
SH		 879#ifdef CONFIG_COMPAT_NET_DEV_OPS
880 struct {
881 int (*init)(struct net_device *dev);
882 void (*uninit)(struct net_device *dev);
883 int (*open)(struct net_device *dev);
884 int (*stop)(struct net_device *dev);
00829823
SH		 885 int (*hard_start_xmit) (struct sk_buff *skb,
886 struct net_device *dev);
887 u16 (*select_queue)(struct net_device *dev,
888 struct sk_buff *skb);
d314774c
SH		 889 void (*change_rx_flags)(struct net_device *dev,
890 int flags);
891 void (*set_rx_mode)(struct net_device *dev);
892 void (*set_multicast_list)(struct net_device *dev);
893 int (*set_mac_address)(struct net_device *dev,
894 void *addr);
895 int (*validate_addr)(struct net_device *dev);
896 int (*do_ioctl)(struct net_device *dev,
897 struct ifreq *ifr, int cmd);
898 int (*set_config)(struct net_device *dev,
899 struct ifmap *map);
900 int (*change_mtu)(struct net_device *dev, int new_mtu);
00829823
SH		 901 int (*neigh_setup)(struct net_device *dev,
902 struct neigh_parms *);
d314774c
SH		 903 void (*tx_timeout) (struct net_device *dev);
904 struct net_device_stats* (*get_stats)(struct net_device *dev);
905 void (*vlan_rx_register)(struct net_device *dev,
906 struct vlan_group *grp);
907 void (*vlan_rx_add_vid)(struct net_device *dev,
908 unsigned short vid);
909 void (*vlan_rx_kill_vid)(struct net_device *dev,
910 unsigned short vid);
911#ifdef CONFIG_NET_POLL_CONTROLLER
912 void (*poll_controller)(struct net_device *dev);
d314774c
SH		 913#endif
914 };
eeda3fd6 915#endif
1da177e4 916};
43cb76d9 917#define to_net_dev(d) container_of(d, struct net_device, dev)
1da177e4
LT		 918
919#define NETDEV_ALIGN 32
920#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
921
e8a0464c
DM		 922static inline
923struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
924 unsigned int index)
925{
926 return &dev->_tx[index];
927}
928
929static inline void netdev_for_each_tx_queue(struct net_device *dev,
930 void (*f)(struct net_device *,
931 struct netdev_queue *,
932 void *),
933 void *arg)
934{
935 unsigned int i;
936
937 for (i = 0; i < dev->num_tx_queues; i++)
938 f(dev, &dev->_tx[i], arg);
939}
940
c346dca1
YH		 941/*
942 * Net namespace inlines
943 */
944static inline
945struct net *dev_net(const struct net_device *dev)
946{
947#ifdef CONFIG_NET_NS
948 return dev->nd_net;
949#else
950 return &init_net;
951#endif
952}
953
954static inline
f5aa23fd 955void dev_net_set(struct net_device *dev, struct net *net)
c346dca1
YH		 956{
957#ifdef CONFIG_NET_NS
f3005d7f
DL		 958 release_net(dev->nd_net);
959 dev->nd_net = hold_net(net);
c346dca1
YH		 960#endif
961}
962
cf85d08f
LB		 963static inline bool netdev_uses_dsa_tags(struct net_device *dev)
964{
965#ifdef CONFIG_NET_DSA_TAG_DSA
966 if (dev->dsa_ptr != NULL)
967 return dsa_uses_dsa_tags(dev->dsa_ptr);
968#endif
969
970 return 0;
971}
972
396138f0
LB		 973static inline bool netdev_uses_trailer_tags(struct net_device *dev)
974{
975#ifdef CONFIG_NET_DSA_TAG_TRAILER
976 if (dev->dsa_ptr != NULL)
977 return dsa_uses_trailer_tags(dev->dsa_ptr);
978#endif
979
980 return 0;
981}
982
bea3348e
SH		 983/**
984 * netdev_priv - access network device private data
985 * @dev: network device
986 *
987 * Get network device private data
988 */
6472ce60 989static inline void *netdev_priv(const struct net_device *dev)
1da177e4 990{
e3c50d5d
DM		 991 return (char *)dev + ((sizeof(struct net_device)
992 + NETDEV_ALIGN_CONST)
993 & ~NETDEV_ALIGN_CONST);
1da177e4
LT		 994}
995
1da177e4
LT		 996/* Set the sysfs physical device reference for the network logical device
997 * if set prior to registration will cause a symlink during initialization.
998 */
43cb76d9 999#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1da177e4 1000
3b582cc1
SH		 1001/**
1002 * netif_napi_add - initialize a napi context
1003 * @dev: network device
1004 * @napi: napi context
1005 * @poll: polling function
1006 * @weight: default weight
1007 *
1008 * netif_napi_add() must be used to initialize a napi context prior to calling
1009 * *any* of the other napi related functions.
1010 */
d565b0a1
HX		 1011void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1012 int (*poll)(struct napi_struct *, int), int weight);
bea3348e 1013
d8156534
AD		 1014/**
1015 * netif_napi_del - remove a napi context
1016 * @napi: napi context
1017 *
1018 * netif_napi_del() removes a napi context from the network device napi list
1019 */
d565b0a1
HX		 1020void netif_napi_del(struct napi_struct *napi);
1021
1022struct napi_gro_cb {
86911732
HX		 1023 /* This indicates where we are processing relative to skb->data. */
1024 int data_offset;
1025
d565b0a1
HX		 1026 /* This is non-zero if the packet may be of the same flow. */
1027 int same_flow;
1028
1029 /* This is non-zero if the packet cannot be merged with the new skb. */
1030 int flush;
1031
1032 /* Number of segments aggregated. */
1033 int count;
5d38a079
HX		 1034
1035 /* Free the skb? */
1036 int free;
d565b0a1
HX		 1037};
1038
1039#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
d8156534 1040
1da177e4 1041struct packet_type {
f2ccd8fa
DM		 1042 __be16 type; /* This is really htons(ether_type). */
1043 struct net_device *dev; /* NULL is wildcarded here */
1044 int (*func) (struct sk_buff *,
1045 struct net_device *,
1046 struct packet_type *,
1047 struct net_device *);
576a30eb
HX		 1048 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1049 int features);
a430a43d 1050 int (*gso_send_check)(struct sk_buff *skb);
d565b0a1
HX		 1051 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1052 struct sk_buff *skb);
1053 int (*gro_complete)(struct sk_buff *skb);
1da177e4
LT		 1054 void *af_packet_priv;
1055 struct list_head list;
1056};
1057
1058#include <linux/interrupt.h>
1059#include <linux/notifier.h>
1060
1da177e4
LT		 1061extern rwlock_t dev_base_lock; /* Device list lock */
1062
7562f876 1063
881d966b
EB		 1064#define for_each_netdev(net, d) \
1065 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1066#define for_each_netdev_safe(net, d, n) \
1067 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1068#define for_each_netdev_continue(net, d) \
1069 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1070#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
7562f876 1071
a050c33f
DL		 1072static inline struct net_device *next_net_device(struct net_device *dev)
1073{
1074 struct list_head *lh;
1075 struct net *net;
1076
c346dca1 1077 net = dev_net(dev);
a050c33f
DL		 1078 lh = dev->dev_list.next;
1079 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1080}
1081
1082static inline struct net_device *first_net_device(struct net *net)
1083{
1084 return list_empty(&net->dev_base_head) ? NULL :
1085 net_device_entry(net->dev_base_head.next);
1086}
7562f876 1087
1da177e4
LT		 1088extern int netdev_boot_setup_check(struct net_device *dev);
1089extern unsigned long netdev_boot_base(const char *prefix, int unit);
881d966b
EB		 1090extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1091extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1092extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1da177e4
LT		 1093extern void dev_add_pack(struct packet_type *pt);
1094extern void dev_remove_pack(struct packet_type *pt);
1095extern void __dev_remove_pack(struct packet_type *pt);
1096
881d966b 1097extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1da177e4 1098 unsigned short mask);
881d966b
EB		 1099extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1100extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1da177e4
LT		 1101extern int dev_alloc_name(struct net_device *dev, const char *name);
1102extern int dev_open(struct net_device *dev);
1103extern int dev_close(struct net_device *dev);
0187bdfb 1104extern void dev_disable_lro(struct net_device *dev);
1da177e4
LT		 1105extern int dev_queue_xmit(struct sk_buff *skb);
1106extern int register_netdevice(struct net_device *dev);
22f8cde5 1107extern void unregister_netdevice(struct net_device *dev);
1da177e4
LT		 1108extern void free_netdev(struct net_device *dev);
1109extern void synchronize_net(void);
1110extern int register_netdevice_notifier(struct notifier_block *nb);
1111extern int unregister_netdevice_notifier(struct notifier_block *nb);
937f1ba5 1112extern int init_dummy_netdev(struct net_device *dev);
9d40bbda 1113extern void netdev_resync_ops(struct net_device *dev);
937f1ba5 1114
ad7379d4 1115extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
881d966b
EB		 1116extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1117extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1da177e4
LT		 1118extern int dev_restart(struct net_device *dev);
1119#ifdef CONFIG_NETPOLL_TRAP
1120extern int netpoll_trap(void);
1121#endif
86911732
HX		 1122extern void *skb_gro_header(struct sk_buff *skb, unsigned int hlen);
1123extern int skb_gro_receive(struct sk_buff **head,
1124 struct sk_buff *skb);
1125
1126static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1127{
1128 return NAPI_GRO_CB(skb)->data_offset;
1129}
1130
1131static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1132{
1133 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1134}
1135
1136static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1137{
1138 NAPI_GRO_CB(skb)->data_offset += len;
1139}
1140
1141static inline void skb_gro_reset_offset(struct sk_buff *skb)
1142{
1143 NAPI_GRO_CB(skb)->data_offset = 0;
1144}
1da177e4 1145
aa4b9f53
HX		 1146static inline void *skb_gro_mac_header(struct sk_buff *skb)
1147{
edbd9e30 1148 return skb_headlen(skb) ? skb_mac_header(skb) :
aa4b9f53
HX		 1149 page_address(skb_shinfo(skb)->frags[0].page) +
1150 skb_shinfo(skb)->frags[0].page_offset;
1151}
1152
36e7b1b8
HX		 1153static inline void *skb_gro_network_header(struct sk_buff *skb)
1154{
1155 return skb_headlen(skb) ? skb_network_header(skb) :
1156 page_address(skb_shinfo(skb)->frags[0].page) +
1157 skb_shinfo(skb)->frags[0].page_offset + skb_network_offset(skb);
1158}
1159
0c4e8581
SH		 1160static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1161 unsigned short type,
3b04ddde
SH		 1162 const void *daddr, const void *saddr,
1163 unsigned len)
0c4e8581 1164{
f1ecfd5d 1165 if (!dev->header_ops || !dev->header_ops->create)
0c4e8581 1166 return 0;
3b04ddde
SH		 1167
1168 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
0c4e8581
SH		 1169}
1170
b95cce35
SH		 1171static inline int dev_parse_header(const struct sk_buff *skb,
1172 unsigned char *haddr)
1173{
1174 const struct net_device *dev = skb->dev;
1175
1b83336b 1176 if (!dev->header_ops || !dev->header_ops->parse)
b95cce35 1177 return 0;
3b04ddde 1178 return dev->header_ops->parse(skb, haddr);
b95cce35
SH		 1179}
1180
1da177e4
LT		 1181typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1182extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1183static inline int unregister_gifconf(unsigned int family)
1184{
1185 return register_gifconf(family, NULL);
1186}
1187
1188/*
1189 * Incoming packets are placed on per-cpu queues so that
1190 * no locking is needed.
1191 */
1da177e4
LT		 1192struct softnet_data
1193{
37437bb2 1194 struct Qdisc *output_queue;
1da177e4
LT		 1195 struct sk_buff_head input_pkt_queue;
1196 struct list_head poll_list;
1da177e4
LT		 1197 struct sk_buff *completion_queue;
1198
bea3348e 1199 struct napi_struct backlog;
1da177e4
LT		 1200};
1201
1202DECLARE_PER_CPU(struct softnet_data,softnet_data);
1203
1204#define HAVE_NETIF_QUEUE
1205
37437bb2 1206extern void __netif_schedule(struct Qdisc *q);
1da177e4 1207
86d804e1 1208static inline void netif_schedule_queue(struct netdev_queue *txq)
1da177e4 1209{
79d16385 1210 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
37437bb2 1211 __netif_schedule(txq->qdisc);
86d804e1
DM		 1212}
1213
fd2ea0a7
DM		 1214static inline void netif_tx_schedule_all(struct net_device *dev)
1215{
1216 unsigned int i;
1217
1218 for (i = 0; i < dev->num_tx_queues; i++)
1219 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1220}
1221
d29f749e
DJ		 1222static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1223{
1224 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1225}
1226
bea3348e
SH		 1227/**
1228 * netif_start_queue - allow transmit
1229 * @dev: network device
1230 *
1231 * Allow upper layers to call the device hard_start_xmit routine.
1232 */
1da177e4
LT		 1233static inline void netif_start_queue(struct net_device *dev)
1234{
e8a0464c 1235 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1da177e4
LT		 1236}
1237
fd2ea0a7
DM		 1238static inline void netif_tx_start_all_queues(struct net_device *dev)
1239{
1240 unsigned int i;
1241
1242 for (i = 0; i < dev->num_tx_queues; i++) {
1243 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1244 netif_tx_start_queue(txq);
1245 }
1246}
1247
79d16385 1248static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1da177e4
LT		 1249{
1250#ifdef CONFIG_NETPOLL_TRAP
5f286e11 1251 if (netpoll_trap()) {
79d16385 1252 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1da177e4 1253 return;
5f286e11 1254 }
1da177e4 1255#endif
79d16385 1256 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
37437bb2 1257 __netif_schedule(dev_queue->qdisc);
79d16385
DM		 1258}
1259
d29f749e
DJ		 1260/**
1261 * netif_wake_queue - restart transmit
1262 * @dev: network device
1263 *
1264 * Allow upper layers to call the device hard_start_xmit routine.
1265 * Used for flow control when transmit resources are available.
1266 */
79d16385
DM		 1267static inline void netif_wake_queue(struct net_device *dev)
1268{
e8a0464c 1269 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1da177e4
LT		 1270}
1271
fd2ea0a7
DM		 1272static inline void netif_tx_wake_all_queues(struct net_device *dev)
1273{
1274 unsigned int i;
1275
1276 for (i = 0; i < dev->num_tx_queues; i++) {
1277 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1278 netif_tx_wake_queue(txq);
1279 }
1280}
1281
d29f749e
DJ		 1282static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1283{
1284 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1285}
1286
bea3348e
SH		 1287/**
1288 * netif_stop_queue - stop transmitted packets
1289 * @dev: network device
1290 *
1291 * Stop upper layers calling the device hard_start_xmit routine.
1292 * Used for flow control when transmit resources are unavailable.
1293 */
1da177e4
LT		 1294static inline void netif_stop_queue(struct net_device *dev)
1295{
e8a0464c 1296 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1da177e4
LT		 1297}
1298
fd2ea0a7
DM		 1299static inline void netif_tx_stop_all_queues(struct net_device *dev)
1300{
1301 unsigned int i;
1302
1303 for (i = 0; i < dev->num_tx_queues; i++) {
1304 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1305 netif_tx_stop_queue(txq);
1306 }
1307}
1308
d29f749e
DJ		 1309static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1310{
1311 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1312}
1313
bea3348e
SH		 1314/**
1315 * netif_queue_stopped - test if transmit queue is flowblocked
1316 * @dev: network device
1317 *
1318 * Test if transmit queue on device is currently unable to send.
1319 */
1da177e4
LT		 1320static inline int netif_queue_stopped(const struct net_device *dev)
1321{
e8a0464c 1322 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1da177e4
LT		 1323}
1324
c3f26a26
DM		 1325static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1326{
1327 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1328}
1329
bea3348e
SH		 1330/**
1331 * netif_running - test if up
1332 * @dev: network device
1333 *
1334 * Test if the device has been brought up.
1335 */
1da177e4
LT		 1336static inline int netif_running(const struct net_device *dev)
1337{
1338 return test_bit(__LINK_STATE_START, &dev->state);
1339}
1340
f25f4e44
PWJ		 1341/*
1342 * Routines to manage the subqueues on a device. We only need start
1343 * stop, and a check if it's stopped. All other device management is
1344 * done at the overall netdevice level.
1345 * Also test the device if we're multiqueue.
1346 */
bea3348e
SH		 1347
1348/**
1349 * netif_start_subqueue - allow sending packets on subqueue
1350 * @dev: network device
1351 * @queue_index: sub queue index
1352 *
1353 * Start individual transmit queue of a device with multiple transmit queues.
1354 */
f25f4e44
PWJ		 1355static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1356{
fd2ea0a7
DM		 1357 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1358 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
f25f4e44
PWJ		 1359}
1360
bea3348e
SH		 1361/**
1362 * netif_stop_subqueue - stop sending packets on subqueue
1363 * @dev: network device
1364 * @queue_index: sub queue index
1365 *
1366 * Stop individual transmit queue of a device with multiple transmit queues.
1367 */
f25f4e44
PWJ		 1368static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1369{
fd2ea0a7 1370 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
f25f4e44
PWJ		 1371#ifdef CONFIG_NETPOLL_TRAP
1372 if (netpoll_trap())
1373 return;
1374#endif
fd2ea0a7 1375 set_bit(__QUEUE_STATE_XOFF, &txq->state);
f25f4e44
PWJ		 1376}
1377
bea3348e
SH		 1378/**
1379 * netif_subqueue_stopped - test status of subqueue
1380 * @dev: network device
1381 * @queue_index: sub queue index
1382 *
1383 * Check individual transmit queue of a device with multiple transmit queues.
1384 */
668f895a 1385static inline int __netif_subqueue_stopped(const struct net_device *dev,
f25f4e44
PWJ		 1386 u16 queue_index)
1387{
fd2ea0a7
DM		 1388 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1389 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
f25f4e44
PWJ		 1390}
1391
668f895a
PE		 1392static inline int netif_subqueue_stopped(const struct net_device *dev,
1393 struct sk_buff *skb)
1394{
1395 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1396}
bea3348e
SH		 1397
1398/**
1399 * netif_wake_subqueue - allow sending packets on subqueue
1400 * @dev: network device
1401 * @queue_index: sub queue index
1402 *
1403 * Resume individual transmit queue of a device with multiple transmit queues.
1404 */
f25f4e44
PWJ		 1405static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1406{
fd2ea0a7 1407 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
f25f4e44
PWJ		 1408#ifdef CONFIG_NETPOLL_TRAP
1409 if (netpoll_trap())
1410 return;
1411#endif
fd2ea0a7 1412 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
37437bb2 1413 __netif_schedule(txq->qdisc);
f25f4e44
PWJ		 1414}
1415
bea3348e
SH		 1416/**
1417 * netif_is_multiqueue - test if device has multiple transmit queues
1418 * @dev: network device
1419 *
1420 * Check if device has multiple transmit queues
bea3348e 1421 */
f25f4e44
PWJ		 1422static inline int netif_is_multiqueue(const struct net_device *dev)
1423{
09e83b5d 1424 return (dev->num_tx_queues > 1);
f25f4e44 1425}
1da177e4
LT		 1426
1427/* Use this variant when it is known for sure that it
0ef47309
ML		 1428 * is executing from hardware interrupt context or with hardware interrupts
1429 * disabled.
1da177e4 1430 */
bea3348e 1431extern void dev_kfree_skb_irq(struct sk_buff *skb);
1da177e4
LT		 1432
1433/* Use this variant in places where it could be invoked
0ef47309
ML		 1434 * from either hardware interrupt or other context, with hardware interrupts
1435 * either disabled or enabled.
1da177e4 1436 */
56079431 1437extern void dev_kfree_skb_any(struct sk_buff *skb);
1da177e4
LT		 1438
1439#define HAVE_NETIF_RX 1
1440extern int netif_rx(struct sk_buff *skb);
1441extern int netif_rx_ni(struct sk_buff *skb);
1442#define HAVE_NETIF_RECEIVE_SKB 1
1443extern int netif_receive_skb(struct sk_buff *skb);
d565b0a1 1444extern void napi_gro_flush(struct napi_struct *napi);
96e93eab
HX		 1445extern int dev_gro_receive(struct napi_struct *napi,
1446 struct sk_buff *skb);
5d0d9be8 1447extern int napi_skb_finish(int ret, struct sk_buff *skb);
d565b0a1
HX		 1448extern int napi_gro_receive(struct napi_struct *napi,
1449 struct sk_buff *skb);
96e93eab
HX		 1450extern void napi_reuse_skb(struct napi_struct *napi,
1451 struct sk_buff *skb);
76620aaf 1452extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
5d0d9be8
HX		 1453extern int napi_frags_finish(struct napi_struct *napi,
1454 struct sk_buff *skb, int ret);
76620aaf
HX		 1455extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1456extern int napi_gro_frags(struct napi_struct *napi);
1457
1458static inline void napi_free_frags(struct napi_struct *napi)
1459{
1460 kfree_skb(napi->skb);
1461 napi->skb = NULL;
1462}
1463
bc1d0411 1464extern void netif_nit_deliver(struct sk_buff *skb);
c2373ee9 1465extern int dev_valid_name(const char *name);
881d966b
EB		 1466extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1467extern int dev_ethtool(struct net *net, struct ifreq *);
1da177e4
LT		 1468extern unsigned dev_get_flags(const struct net_device *);
1469extern int dev_change_flags(struct net_device *, unsigned);
cf04a4c7 1470extern int dev_change_name(struct net_device *, const char *);
0b815a1a 1471extern int dev_set_alias(struct net_device *, const char *, size_t);
ce286d32
EB		 1472extern int dev_change_net_namespace(struct net_device *,
1473 struct net *, const char *);
1da177e4
LT		 1474extern int dev_set_mtu(struct net_device *, int);
1475extern int dev_set_mac_address(struct net_device *,
1476 struct sockaddr *);
f6a78bfc 1477extern int dev_hard_start_xmit(struct sk_buff *skb,
fd2ea0a7
DM		 1478 struct net_device *dev,
1479 struct netdev_queue *txq);
1da177e4 1480
20380731 1481extern int netdev_budget;
1da177e4
LT		 1482
1483/* Called by rtnetlink.c:rtnl_unlock() */
1484extern void netdev_run_todo(void);
1485
bea3348e
SH		 1486/**
1487 * dev_put - release reference to device
1488 * @dev: network device
1489 *
9ef4429b 1490 * Release reference to device to allow it to be freed.
bea3348e 1491 */
1da177e4
LT		 1492static inline void dev_put(struct net_device *dev)
1493{
1494 atomic_dec(&dev->refcnt);
1495}
1496
bea3348e
SH		 1497/**
1498 * dev_hold - get reference to device
1499 * @dev: network device
1500 *
9ef4429b 1501 * Hold reference to device to keep it from being freed.
bea3348e 1502 */
15333061
SH		 1503static inline void dev_hold(struct net_device *dev)
1504{
1505 atomic_inc(&dev->refcnt);
1506}
1da177e4
LT		 1507
1508/* Carrier loss detection, dial on demand. The functions netif_carrier_on
1509 * and _off may be called from IRQ context, but it is caller
1510 * who is responsible for serialization of these calls.
b00055aa
SR		 1511 *
1512 * The name carrier is inappropriate, these functions should really be
1513 * called netif_lowerlayer_*() because they represent the state of any
1514 * kind of lower layer not just hardware media.
1da177e4
LT		 1515 */
1516
1517extern void linkwatch_fire_event(struct net_device *dev);
1518
bea3348e
SH		 1519/**
1520 * netif_carrier_ok - test if carrier present
1521 * @dev: network device
1522 *
1523 * Check if carrier is present on device
1524 */
1da177e4
LT		 1525static inline int netif_carrier_ok(const struct net_device *dev)
1526{
1527 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1528}
1529
1530extern void __netdev_watchdog_up(struct net_device *dev);
1531
0a242efc 1532extern void netif_carrier_on(struct net_device *dev);
1da177e4 1533
0a242efc 1534extern void netif_carrier_off(struct net_device *dev);
1da177e4 1535
bea3348e
SH		 1536/**
1537 * netif_dormant_on - mark device as dormant.
1538 * @dev: network device
1539 *
1540 * Mark device as dormant (as per RFC2863).
1541 *
1542 * The dormant state indicates that the relevant interface is not
1543 * actually in a condition to pass packets (i.e., it is not 'up') but is
1544 * in a "pending" state, waiting for some external event. For "on-
1545 * demand" interfaces, this new state identifies the situation where the
1546 * interface is waiting for events to place it in the up state.
1547 *
1548 */
b00055aa
SR		 1549static inline void netif_dormant_on(struct net_device *dev)
1550{
1551 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1552 linkwatch_fire_event(dev);
1553}
1554
bea3348e
SH		 1555/**
1556 * netif_dormant_off - set device as not dormant.
1557 * @dev: network device
1558 *
1559 * Device is not in dormant state.
1560 */
b00055aa
SR		 1561static inline void netif_dormant_off(struct net_device *dev)
1562{
1563 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1564 linkwatch_fire_event(dev);
1565}
1566
bea3348e
SH		 1567/**
1568 * netif_dormant - test if carrier present
1569 * @dev: network device
1570 *
1571 * Check if carrier is present on device
1572 */
b00055aa
SR		 1573static inline int netif_dormant(const struct net_device *dev)
1574{
1575 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1576}
1577
1578
bea3348e
SH		 1579/**
1580 * netif_oper_up - test if device is operational
1581 * @dev: network device
1582 *
1583 * Check if carrier is operational
1584 */
b00055aa
SR		 1585static inline int netif_oper_up(const struct net_device *dev) {
1586 return (dev->operstate == IF_OPER_UP ||
1587 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1588}
1589
bea3348e
SH		 1590/**
1591 * netif_device_present - is device available or removed
1592 * @dev: network device
1593 *
1594 * Check if device has not been removed from system.
1595 */
1da177e4
LT		 1596static inline int netif_device_present(struct net_device *dev)
1597{
1598 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1599}
1600
56079431 1601extern void netif_device_detach(struct net_device *dev);
1da177e4 1602
56079431 1603extern void netif_device_attach(struct net_device *dev);
1da177e4
LT		 1604
1605/*
1606 * Network interface message level settings
1607 */
1608#define HAVE_NETIF_MSG 1
1609
1610enum {
1611 NETIF_MSG_DRV = 0x0001,
1612 NETIF_MSG_PROBE = 0x0002,
1613 NETIF_MSG_LINK = 0x0004,
1614 NETIF_MSG_TIMER = 0x0008,
1615 NETIF_MSG_IFDOWN = 0x0010,
1616 NETIF_MSG_IFUP = 0x0020,
1617 NETIF_MSG_RX_ERR = 0x0040,
1618 NETIF_MSG_TX_ERR = 0x0080,
1619 NETIF_MSG_TX_QUEUED = 0x0100,
1620 NETIF_MSG_INTR = 0x0200,
1621 NETIF_MSG_TX_DONE = 0x0400,
1622 NETIF_MSG_RX_STATUS = 0x0800,
1623 NETIF_MSG_PKTDATA = 0x1000,
1624 NETIF_MSG_HW = 0x2000,
1625 NETIF_MSG_WOL = 0x4000,
1626};
1627
1628#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1629#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1630#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1631#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1632#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1633#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1634#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1635#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1636#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1637#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1638#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1639#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1640#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1641#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1642#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1643
1644static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1645{
1646 /* use default */
1647 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1648 return default_msg_enable_bits;
1649 if (debug_value == 0) /* no output */
1650 return 0;
1651 /* set low N bits */
1652 return (1 << debug_value) - 1;
1653}
1654
c773e847 1655static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
932ff279 1656{
c773e847
DM		 1657 spin_lock(&txq->_xmit_lock);
1658 txq->xmit_lock_owner = cpu;
22dd7495
JHS		 1659}
1660
fd2ea0a7
DM		 1661static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1662{
1663 spin_lock_bh(&txq->_xmit_lock);
1664 txq->xmit_lock_owner = smp_processor_id();
1665}
1666
c3f26a26
DM		 1667static inline int __netif_tx_trylock(struct netdev_queue *txq)
1668{
1669 int ok = spin_trylock(&txq->_xmit_lock);
1670 if (likely(ok))
1671 txq->xmit_lock_owner = smp_processor_id();
1672 return ok;
1673}
1674
1675static inline void __netif_tx_unlock(struct netdev_queue *txq)
1676{
1677 txq->xmit_lock_owner = -1;
1678 spin_unlock(&txq->_xmit_lock);
1679}
1680
1681static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1682{
1683 txq->xmit_lock_owner = -1;
1684 spin_unlock_bh(&txq->_xmit_lock);
1685}
1686
d29f749e
DJ		 1687/**
1688 * netif_tx_lock - grab network device transmit lock
1689 * @dev: network device
d29f749e
DJ		 1690 *
1691 * Get network device transmit lock
1692 */
22dd7495
JHS		 1693static inline void netif_tx_lock(struct net_device *dev)
1694{
e8a0464c 1695 unsigned int i;
c3f26a26 1696 int cpu;
c773e847 1697
c3f26a26
DM		 1698 spin_lock(&dev->tx_global_lock);
1699 cpu = smp_processor_id();
e8a0464c
DM		 1700 for (i = 0; i < dev->num_tx_queues; i++) {
1701 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
c3f26a26
DM		 1702
1703 /* We are the only thread of execution doing a
1704 * freeze, but we have to grab the _xmit_lock in
1705 * order to synchronize with threads which are in
1706 * the ->hard_start_xmit() handler and already
1707 * checked the frozen bit.
1708 */
e8a0464c 1709 __netif_tx_lock(txq, cpu);
c3f26a26
DM		 1710 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1711 __netif_tx_unlock(txq);
e8a0464c 1712 }
932ff279
HX		 1713}
1714
1715static inline void netif_tx_lock_bh(struct net_device *dev)
1716{
e8a0464c
DM		 1717 local_bh_disable();
1718 netif_tx_lock(dev);
932ff279
HX		 1719}
1720
932ff279
HX		 1721static inline void netif_tx_unlock(struct net_device *dev)
1722{
e8a0464c
DM		 1723 unsigned int i;
1724
1725 for (i = 0; i < dev->num_tx_queues; i++) {
1726 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
c773e847 1727
c3f26a26
DM		 1728 /* No need to grab the _xmit_lock here. If the
1729 * queue is not stopped for another reason, we
1730 * force a schedule.
1731 */
1732 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1733 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1734 __netif_schedule(txq->qdisc);
1735 }
1736 spin_unlock(&dev->tx_global_lock);
932ff279
HX		 1737}
1738
1739static inline void netif_tx_unlock_bh(struct net_device *dev)
1740{
e8a0464c
DM		 1741 netif_tx_unlock(dev);
1742 local_bh_enable();
932ff279
HX		 1743}
1744
c773e847 1745#define HARD_TX_LOCK(dev, txq, cpu) { \
22dd7495 1746 if ((dev->features & NETIF_F_LLTX) == 0) { \
c773e847 1747 __netif_tx_lock(txq, cpu); \
22dd7495
JHS		 1748 } \
1749}
1750
c773e847 1751#define HARD_TX_UNLOCK(dev, txq) { \
22dd7495 1752 if ((dev->features & NETIF_F_LLTX) == 0) { \
c773e847 1753 __netif_tx_unlock(txq); \
22dd7495
JHS		 1754 } \
1755}
1756
1da177e4
LT		 1757static inline void netif_tx_disable(struct net_device *dev)
1758{
fd2ea0a7 1759 unsigned int i;
c3f26a26 1760 int cpu;
fd2ea0a7 1761
c3f26a26
DM		 1762 local_bh_disable();
1763 cpu = smp_processor_id();
fd2ea0a7
DM		 1764 for (i = 0; i < dev->num_tx_queues; i++) {
1765 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
c3f26a26
DM		 1766
1767 __netif_tx_lock(txq, cpu);
fd2ea0a7 1768 netif_tx_stop_queue(txq);
c3f26a26 1769 __netif_tx_unlock(txq);
fd2ea0a7 1770 }
c3f26a26 1771 local_bh_enable();
1da177e4
LT		 1772}
1773
e308a5d8
DM		 1774static inline void netif_addr_lock(struct net_device *dev)
1775{
1776 spin_lock(&dev->addr_list_lock);
1777}
1778
1779static inline void netif_addr_lock_bh(struct net_device *dev)
1780{
1781 spin_lock_bh(&dev->addr_list_lock);
1782}
1783
1784static inline void netif_addr_unlock(struct net_device *dev)
1785{
1786 spin_unlock(&dev->addr_list_lock);
1787}
1788
1789static inline void netif_addr_unlock_bh(struct net_device *dev)
1790{
1791 spin_unlock_bh(&dev->addr_list_lock);
1792}
1793
1da177e4
LT		 1794/* These functions live elsewhere (drivers/net/net_init.c, but related) */
1795
1796extern void ether_setup(struct net_device *dev);
1797
1798/* Support for loadable net-drivers */
f25f4e44
PWJ		 1799extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1800 void (*setup)(struct net_device *),
1801 unsigned int queue_count);
1802#define alloc_netdev(sizeof_priv, name, setup) \
1803 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1da177e4
LT		 1804extern int register_netdev(struct net_device *dev);
1805extern void unregister_netdev(struct net_device *dev);
4417da66
PM		 1806/* Functions used for secondary unicast and multicast support */
1807extern void dev_set_rx_mode(struct net_device *dev);
1808extern void __dev_set_rx_mode(struct net_device *dev);
1809extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1810extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
e83a2ea8
CL		 1811extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1812extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1da177e4
LT		 1813extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1814extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
a0a400d7
PM		 1815extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1816extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
61cbc2fc
PM		 1817extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1818extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
e83a2ea8
CL		 1819extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1820extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
dad9b335
WC		 1821extern int dev_set_promiscuity(struct net_device *dev, int inc);
1822extern int dev_set_allmulti(struct net_device *dev, int inc);
1da177e4 1823extern void netdev_state_change(struct net_device *dev);
c1da4ac7 1824extern void netdev_bonding_change(struct net_device *dev);
d8a33ac4 1825extern void netdev_features_change(struct net_device *dev);
1da177e4 1826/* Load a device via the kmod */
881d966b 1827extern void dev_load(struct net *net, const char *name);
1da177e4 1828extern void dev_mcast_init(void);
eeda3fd6
SH		 1829extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1830
1da177e4
LT		 1831extern int netdev_max_backlog;
1832extern int weight_p;
1833extern int netdev_set_master(struct net_device *dev, struct net_device *master);
84fa7933 1834extern int skb_checksum_help(struct sk_buff *skb);
576a30eb 1835extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
fb286bb2
HX		 1836#ifdef CONFIG_BUG
1837extern void netdev_rx_csum_fault(struct net_device *dev);
1838#else
1839static inline void netdev_rx_csum_fault(struct net_device *dev)
1840{
1841}
1842#endif
1da177e4
LT		 1843/* rx skb timestamps */
1844extern void net_enable_timestamp(void);
1845extern void net_disable_timestamp(void);
1846
20380731
ACM		 1847#ifdef CONFIG_PROC_FS
1848extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1849extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1850extern void dev_seq_stop(struct seq_file *seq, void *v);
1851#endif
1852
b8a9787e
JV		 1853extern int netdev_class_create_file(struct class_attribute *class_attr);
1854extern void netdev_class_remove_file(struct class_attribute *class_attr);
1855
cf04a4c7 1856extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
6579e57b 1857
20380731
ACM		 1858extern void linkwatch_run_queue(void);
1859
b63365a2
HX		 1860unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1861 unsigned long mask);
1862unsigned long netdev_fix_features(unsigned long features, const char *name);
7f353bf2 1863
bcd76111 1864static inline int net_gso_ok(int features, int gso_type)
576a30eb 1865{
bcd76111 1866 int feature = gso_type << NETIF_F_GSO_SHIFT;
d6b4991a 1867 return (features & feature) == feature;
576a30eb
HX		 1868}
1869
bcd76111
HX		 1870static inline int skb_gso_ok(struct sk_buff *skb, int features)
1871{
a430a43d 1872 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
bcd76111
HX		 1873}
1874
7967168c
HX		 1875static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1876{
a430a43d
HX		 1877 return skb_is_gso(skb) &&
1878 (!skb_gso_ok(skb, dev->features) ||
1a881f27
HX		 1879 (skb_shinfo(skb)->frag_list &&
1880 !(dev->features & NETIF_F_FRAGLIST)) ||
84fa7933 1881 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
7967168c
HX		 1882}
1883
82cc1a7a
PWJ		 1884static inline void netif_set_gso_max_size(struct net_device *dev,
1885 unsigned int size)
1886{
1887 dev->gso_max_size = size;
1888}
1889
7ea49ed7 1890/* On bonding slaves other than the currently active slave, suppress
f5b2b966
JV		 1891 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1892 * ARP on active-backup slaves with arp_validate enabled.
7ea49ed7
DM		 1893 */
1894static inline int skb_bond_should_drop(struct sk_buff *skb)
1895{
1896 struct net_device *dev = skb->dev;
1897 struct net_device *master = dev->master;
1898
6cf3f41e
JV		 1899 if (master) {
1900 if (master->priv_flags & IFF_MASTER_ARPMON)
1901 dev->last_rx = jiffies;
1902
1903 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
1904 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
f3a7c66b 1905 skb->protocol == __cpu_to_be16(ETH_P_ARP))
7ea49ed7 1906 return 0;
7ea49ed7 1907
6cf3f41e
JV		 1908 if (master->priv_flags & IFF_MASTER_ALB) {
1909 if (skb->pkt_type != PACKET_BROADCAST &&
1910 skb->pkt_type != PACKET_MULTICAST)
1911 return 0;
1912 }
1913 if (master->priv_flags & IFF_MASTER_8023AD &&
f3a7c66b 1914 skb->protocol == __cpu_to_be16(ETH_P_SLOW))
6cf3f41e
JV		 1915 return 0;
1916
1917 return 1;
1918 }
7ea49ed7
DM		 1919 }
1920 return 0;
1921}
1922
505d4f73 1923extern struct pernet_operations __net_initdata loopback_net_ops;
b1b67dd4
PM		 1924
1925static inline int dev_ethtool_get_settings(struct net_device *dev,
1926 struct ethtool_cmd *cmd)
1927{
1928 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
1929 return -EOPNOTSUPP;
1930 return dev->ethtool_ops->get_settings(dev, cmd);
1931}
1932
1933static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
1934{
1935 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
1936 return 0;
1937 return dev->ethtool_ops->get_rx_csum(dev);
1938}
1939
1940static inline u32 dev_ethtool_get_flags(struct net_device *dev)
1941{
1942 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
1943 return 0;
1944 return dev->ethtool_ops->get_flags(dev);
1945}
1da177e4
LT		 1946#endif /* __KERNEL__ */
1947
1948#endif /* _LINUX_DEV_H */
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