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