netdevice.h 58.2 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3 4 5 6 7 8 9
/*
 * INET		An implementation of the TCP/IP protocol suite for the LINUX
 *		operating system.  INET is implemented using the  BSD Socket
 *		interface as the means of communication with the user level.
 *
 *		Definitions for the Interfaces handler.
 *
 * Version:	@(#)dev.h	1.0.10	08/12/93
 *
10
 * Authors:	Ross Biro
L
Linus Torvalds 已提交
11 12 13
 *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
 *		Corey Minyard <wf-rch!minyard@relay.EU.net>
 *		Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14
 *		Alan Cox, <alan@lxorguk.ukuu.org.uk>
L
Linus Torvalds 已提交
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
 *		Bjorn Ekwall. <bj0rn@blox.se>
 *              Pekka Riikonen <priikone@poseidon.pspt.fi>
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 *		Moved to /usr/include/linux for NET3
 */
#ifndef _LINUX_NETDEVICE_H
#define _LINUX_NETDEVICE_H

#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/if_packet.h>

#ifdef __KERNEL__
A
Al Viro 已提交
33
#include <linux/timer.h>
34
#include <linux/delay.h>
35
#include <linux/mm.h>
L
Linus Torvalds 已提交
36 37 38 39 40 41
#include <asm/atomic.h>
#include <asm/cache.h>
#include <asm/byteorder.h>

#include <linux/device.h>
#include <linux/percpu.h>
42
#include <linux/rculist.h>
43
#include <linux/dmaengine.h>
44
#include <linux/workqueue.h>
L
Linus Torvalds 已提交
45

46
#include <linux/ethtool.h>
47
#include <net/net_namespace.h>
48
#include <net/dsa.h>
J
Jeff Kirsher 已提交
49
#ifdef CONFIG_DCB
50 51
#include <net/dcbnl.h>
#endif
52

L
Linus Torvalds 已提交
53
struct vlan_group;
54
struct netpoll_info;
55 56
/* 802.11 specific */
struct wireless_dev;
L
Linus Torvalds 已提交
57 58 59 60 61 62 63 64 65 66 67 68 69
					/* source back-compat hooks */
#define SET_ETHTOOL_OPS(netdev,ops) \
	( (netdev)->ethtool_ops = (ops) )

#define HAVE_ALLOC_NETDEV		/* feature macro: alloc_xxxdev
					   functions are available. */
#define HAVE_FREE_NETDEV		/* free_netdev() */
#define HAVE_NETDEV_PRIV		/* netdev_priv() */

#define NET_XMIT_SUCCESS	0
#define NET_XMIT_DROP		1	/* skb dropped			*/
#define NET_XMIT_CN		2	/* congestion notification	*/
#define NET_XMIT_POLICED	3	/* skb is shot by police	*/
70
#define NET_XMIT_MASK		0xFFFF	/* qdisc flags in net/sch_generic.h */
L
Linus Torvalds 已提交
71 72 73 74 75 76 77 78 79

/* Backlog congestion levels */
#define NET_RX_SUCCESS		0   /* keep 'em coming, baby */
#define NET_RX_DROP		1  /* packet dropped */
#define NET_RX_CN_LOW		2   /* storm alert, just in case */
#define NET_RX_CN_MOD		3   /* Storm on its way! */
#define NET_RX_CN_HIGH		4   /* The storm is here */
#define NET_RX_BAD		5  /* packet dropped due to kernel error */

80 81 82 83
/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
 * indicates that the device will soon be dropping packets, or already drops
 * some packets of the same priority; prompting us to send less aggressively. */
#define net_xmit_eval(e)	((e) == NET_XMIT_CN? 0 : (e))
L
Linus Torvalds 已提交
84 85 86 87 88 89 90 91 92 93 94
#define net_xmit_errno(e)	((e) != NET_XMIT_CN ? -ENOBUFS : 0)

#endif

#define MAX_ADDR_LEN	32		/* Largest hardware address length */

/* Driver transmit return codes */
#define NETDEV_TX_OK 0		/* driver took care of packet */
#define NETDEV_TX_BUSY 1	/* driver tx path was busy*/
#define NETDEV_TX_LOCKED -1	/* driver tx lock was already taken */

95 96
#ifdef  __KERNEL__

L
Linus Torvalds 已提交
97 98 99 100
/*
 *	Compute the worst case header length according to the protocols
 *	used.
 */
G
Graf Yang 已提交
101

102 103 104 105 106 107
#if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
# if defined(CONFIG_MAC80211_MESH)
#  define LL_MAX_HEADER 128
# else
#  define LL_MAX_HEADER 96
# endif
108
#elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
109
# define LL_MAX_HEADER 48
L
Linus Torvalds 已提交
110
#else
111
# define LL_MAX_HEADER 32
L
Linus Torvalds 已提交
112 113
#endif

D
David S. Miller 已提交
114 115 116 117
#if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
    !defined(CONFIG_NET_IPGRE) &&  !defined(CONFIG_NET_IPGRE_MODULE) && \
    !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
    !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
L
Linus Torvalds 已提交
118 119 120 121 122
#define MAX_HEADER LL_MAX_HEADER
#else
#define MAX_HEADER (LL_MAX_HEADER + 48)
#endif

123 124
#endif  /*  __KERNEL__  */

L
Linus Torvalds 已提交
125 126 127 128
/*
 *	Network device statistics. Akin to the 2.0 ether stats but
 *	with byte counters.
 */
G
Graf Yang 已提交
129

L
Linus Torvalds 已提交
130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193
struct net_device_stats
{
	unsigned long	rx_packets;		/* total packets received	*/
	unsigned long	tx_packets;		/* total packets transmitted	*/
	unsigned long	rx_bytes;		/* total bytes received 	*/
	unsigned long	tx_bytes;		/* total bytes transmitted	*/
	unsigned long	rx_errors;		/* bad packets received		*/
	unsigned long	tx_errors;		/* packet transmit problems	*/
	unsigned long	rx_dropped;		/* no space in linux buffers	*/
	unsigned long	tx_dropped;		/* no space available in linux	*/
	unsigned long	multicast;		/* multicast packets received	*/
	unsigned long	collisions;

	/* detailed rx_errors: */
	unsigned long	rx_length_errors;
	unsigned long	rx_over_errors;		/* receiver ring buff overflow	*/
	unsigned long	rx_crc_errors;		/* recved pkt with crc error	*/
	unsigned long	rx_frame_errors;	/* recv'd frame alignment error */
	unsigned long	rx_fifo_errors;		/* recv'r fifo overrun		*/
	unsigned long	rx_missed_errors;	/* receiver missed packet	*/

	/* detailed tx_errors */
	unsigned long	tx_aborted_errors;
	unsigned long	tx_carrier_errors;
	unsigned long	tx_fifo_errors;
	unsigned long	tx_heartbeat_errors;
	unsigned long	tx_window_errors;
	
	/* for cslip etc */
	unsigned long	rx_compressed;
	unsigned long	tx_compressed;
};


/* Media selection options. */
enum {
        IF_PORT_UNKNOWN = 0,
        IF_PORT_10BASE2,
        IF_PORT_10BASET,
        IF_PORT_AUI,
        IF_PORT_100BASET,
        IF_PORT_100BASETX,
        IF_PORT_100BASEFX
};

#ifdef __KERNEL__

#include <linux/cache.h>
#include <linux/skbuff.h>

struct neighbour;
struct neigh_parms;
struct sk_buff;

struct netif_rx_stats
{
	unsigned total;
	unsigned dropped;
	unsigned time_squeeze;
	unsigned cpu_collision;
};

DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);

194 195 196 197 198
struct dev_addr_list
{
	struct dev_addr_list	*next;
	u8			da_addr[MAX_ADDR_LEN];
	u8			da_addrlen;
199
	u8			da_synced;
200 201 202
	int			da_users;
	int			da_gusers;
};
L
Linus Torvalds 已提交
203 204 205 206

/*
 *	We tag multicasts with these structures.
 */
207 208 209 210 211 212

#define dev_mc_list	dev_addr_list
#define dmi_addr	da_addr
#define dmi_addrlen	da_addrlen
#define dmi_users	da_users
#define dmi_gusers	da_gusers
L
Linus Torvalds 已提交
213

214 215 216 217 218 219 220 221 222 223
struct netdev_hw_addr {
	struct list_head	list;
	unsigned char		addr[MAX_ADDR_LEN];
	unsigned char		type;
#define NETDEV_HW_ADDR_T_LAN	1
#define NETDEV_HW_ADDR_T_SAN	2
#define NETDEV_HW_ADDR_T_SLAVE	3
	struct rcu_head		rcu_head;
};

L
Linus Torvalds 已提交
224 225 226 227
struct hh_cache
{
	struct hh_cache *hh_next;	/* Next entry			     */
	atomic_t	hh_refcnt;	/* number of users                   */
228 229 230 231 232 233 234 235
/*
 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
 * cache line on SMP.
 * They are mostly read, but hh_refcnt may be changed quite frequently,
 * incurring cache line ping pongs.
 */
	__be16		hh_type ____cacheline_aligned_in_smp;
					/* protocol identifier, f.e ETH_P_IP
L
Linus Torvalds 已提交
236 237 238
                                         *  NOTE:  For VLANs, this will be the
                                         *  encapuslated type. --BLG
                                         */
239
	u16		hh_len;		/* length of header */
L
Linus Torvalds 已提交
240
	int		(*hh_output)(struct sk_buff *skb);
241
	seqlock_t	hh_lock;
L
Linus Torvalds 已提交
242 243 244 245

	/* cached hardware header; allow for machine alignment needs.        */
#define HH_DATA_MOD	16
#define HH_DATA_OFF(__len) \
J
Jiri Benc 已提交
246
	(HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
L
Linus Torvalds 已提交
247 248 249 250 251 252 253 254 255 256 257 258
#define HH_DATA_ALIGN(__len) \
	(((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
	unsigned long	hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
};

/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
 * Alternative is:
 *   dev->hard_header_len ? (dev->hard_header_len +
 *                           (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
 *
 * We could use other alignment values, but we must maintain the
 * relationship HH alignment <= LL alignment.
259 260 261
 *
 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
 * may need.
L
Linus Torvalds 已提交
262 263
 */
#define LL_RESERVED_SPACE(dev) \
264
	((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
L
Linus Torvalds 已提交
265
#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
266 267 268
	((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
#define LL_ALLOCATED_SPACE(dev) \
	((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
L
Linus Torvalds 已提交
269

270 271 272 273 274 275 276 277 278 279 280 281 282
struct header_ops {
	int	(*create) (struct sk_buff *skb, struct net_device *dev,
			   unsigned short type, const void *daddr,
			   const void *saddr, unsigned len);
	int	(*parse)(const struct sk_buff *skb, unsigned char *haddr);
	int	(*rebuild)(struct sk_buff *skb);
#define HAVE_HEADER_CACHE
	int	(*cache)(const struct neighbour *neigh, struct hh_cache *hh);
	void	(*cache_update)(struct hh_cache *hh,
				const struct net_device *dev,
				const unsigned char *haddr);
};

L
Linus Torvalds 已提交
283 284 285 286 287 288 289 290 291 292
/* These flag bits are private to the generic network queueing
 * layer, they may not be explicitly referenced by any other
 * code.
 */

enum netdev_state_t
{
	__LINK_STATE_START,
	__LINK_STATE_PRESENT,
	__LINK_STATE_NOCARRIER,
S
Stefan Rompf 已提交
293 294
	__LINK_STATE_LINKWATCH_PENDING,
	__LINK_STATE_DORMANT,
L
Linus Torvalds 已提交
295 296 297 298 299
};


/*
 * This structure holds at boot time configured netdevice settings. They
G
Graf Yang 已提交
300
 * are then used in the device probing.
L
Linus Torvalds 已提交
301 302 303 304 305 306 307
 */
struct netdev_boot_setup {
	char name[IFNAMSIZ];
	struct ifmap map;
};
#define NETDEV_BOOT_SETUP_MAX 8

308
extern int __init netdev_boot_setup(char *str);
L
Linus Torvalds 已提交
309

310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328
/*
 * Structure for NAPI scheduling similar to tasklet but with weighting
 */
struct napi_struct {
	/* The poll_list must only be managed by the entity which
	 * changes the state of the NAPI_STATE_SCHED bit.  This means
	 * whoever atomically sets that bit can add this napi_struct
	 * to the per-cpu poll_list, and whoever clears that bit
	 * can remove from the list right before clearing the bit.
	 */
	struct list_head	poll_list;

	unsigned long		state;
	int			weight;
	int			(*poll)(struct napi_struct *, int);
#ifdef CONFIG_NETPOLL
	spinlock_t		poll_lock;
	int			poll_owner;
#endif
329 330 331

	unsigned int		gro_count;

H
Herbert Xu 已提交
332
	struct net_device	*dev;
333 334
	struct list_head	dev_list;
	struct sk_buff		*gro_list;
H
Herbert Xu 已提交
335
	struct sk_buff		*skb;
336 337 338 339 340
};

enum
{
	NAPI_STATE_SCHED,	/* Poll is scheduled */
D
David S. Miller 已提交
341
	NAPI_STATE_DISABLE,	/* Disable pending */
342
	NAPI_STATE_NPSVC,	/* Netpoll - don't dequeue from poll_list */
343 344
};

345 346 347 348 349 350 351 352
enum {
	GRO_MERGED,
	GRO_MERGED_FREE,
	GRO_HELD,
	GRO_NORMAL,
	GRO_DROP,
};

353
extern void __napi_schedule(struct napi_struct *n);
354

D
David S. Miller 已提交
355 356 357 358 359
static inline int napi_disable_pending(struct napi_struct *n)
{
	return test_bit(NAPI_STATE_DISABLE, &n->state);
}

360 361 362 363 364 365
/**
 *	napi_schedule_prep - check if napi can be scheduled
 *	@n: napi context
 *
 * Test if NAPI routine is already running, and if not mark
 * it as running.  This is used as a condition variable
D
David S. Miller 已提交
366 367
 * insure only one NAPI poll instance runs.  We also make
 * sure there is no pending NAPI disable.
368 369 370
 */
static inline int napi_schedule_prep(struct napi_struct *n)
{
D
David S. Miller 已提交
371 372
	return !napi_disable_pending(n) &&
		!test_and_set_bit(NAPI_STATE_SCHED, &n->state);
373 374 375 376 377 378 379 380 381 382 383 384 385 386 387
}

/**
 *	napi_schedule - schedule NAPI poll
 *	@n: napi context
 *
 * Schedule NAPI poll routine to be called if it is not already
 * running.
 */
static inline void napi_schedule(struct napi_struct *n)
{
	if (napi_schedule_prep(n))
		__napi_schedule(n);
}

388 389 390 391 392 393 394 395 396 397
/* Try to reschedule poll. Called by dev->poll() after napi_complete().  */
static inline int napi_reschedule(struct napi_struct *napi)
{
	if (napi_schedule_prep(napi)) {
		__napi_schedule(napi);
		return 1;
	}
	return 0;
}

398 399 400 401 402 403
/**
 *	napi_complete - NAPI processing complete
 *	@n: napi context
 *
 * Mark NAPI processing as complete.
 */
404 405
extern void __napi_complete(struct napi_struct *n);
extern void napi_complete(struct napi_struct *n);
406 407 408 409 410 411 412 413 414 415

/**
 *	napi_disable - prevent NAPI from scheduling
 *	@n: napi context
 *
 * Stop NAPI from being scheduled on this context.
 * Waits till any outstanding processing completes.
 */
static inline void napi_disable(struct napi_struct *n)
{
D
David S. Miller 已提交
416
	set_bit(NAPI_STATE_DISABLE, &n->state);
417
	while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
418
		msleep(1);
D
David S. Miller 已提交
419
	clear_bit(NAPI_STATE_DISABLE, &n->state);
420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435
}

/**
 *	napi_enable - enable NAPI scheduling
 *	@n: napi context
 *
 * Resume NAPI from being scheduled on this context.
 * Must be paired with napi_disable.
 */
static inline void napi_enable(struct napi_struct *n)
{
	BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
	smp_mb__before_clear_bit();
	clear_bit(NAPI_STATE_SCHED, &n->state);
}

436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453
#ifdef CONFIG_SMP
/**
 *	napi_synchronize - wait until NAPI is not running
 *	@n: napi context
 *
 * Wait until NAPI is done being scheduled on this context.
 * Waits till any outstanding processing completes but
 * does not disable future activations.
 */
static inline void napi_synchronize(const struct napi_struct *n)
{
	while (test_bit(NAPI_STATE_SCHED, &n->state))
		msleep(1);
}
#else
# define napi_synchronize(n)	barrier()
#endif

454 455 456
enum netdev_queue_state_t
{
	__QUEUE_STATE_XOFF,
457
	__QUEUE_STATE_FROZEN,
458 459
};

460
struct netdev_queue {
461 462 463
/*
 * read mostly part
 */
464
	struct net_device	*dev;
465
	struct Qdisc		*qdisc;
466
	unsigned long		state;
467
	struct Qdisc		*qdisc_sleeping;
468 469 470 471 472
/*
 * write mostly part
 */
	spinlock_t		_xmit_lock ____cacheline_aligned_in_smp;
	int			xmit_lock_owner;
473 474 475 476
	/*
	 * please use this field instead of dev->trans_start
	 */
	unsigned long		trans_start;
477 478 479
	unsigned long		tx_bytes;
	unsigned long		tx_packets;
	unsigned long		tx_dropped;
480
} ____cacheline_aligned_in_smp;
481

482 483 484

/*
 * This structure defines the management hooks for network devices.
485 486
 * The following hooks can be defined; unless noted otherwise, they are
 * optional and can be filled with a null pointer.
487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505
 *
 * int (*ndo_init)(struct net_device *dev);
 *     This function is called once when network device is registered.
 *     The network device can use this to any late stage initializaton
 *     or semantic validattion. It can fail with an error code which will
 *     be propogated back to register_netdev
 *
 * void (*ndo_uninit)(struct net_device *dev);
 *     This function is called when device is unregistered or when registration
 *     fails. It is not called if init fails.
 *
 * int (*ndo_open)(struct net_device *dev);
 *     This function is called when network device transistions to the up
 *     state.
 *
 * int (*ndo_stop)(struct net_device *dev);
 *     This function is called when network device transistions to the down
 *     state.
 *
506
 * int (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev);
507 508 509 510 511 512 513 514
 *	Called when a packet needs to be transmitted.
 *	Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED,
 *	Required can not be NULL.
 *
 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
 *	Called to decide which queue to when device supports multiple
 *	transmit queues.
 *
515 516 517 518 519 520 521 522 523 524 525 526
 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
 *	This function is called to allow device receiver to make
 *	changes to configuration when multicast or promiscious is enabled.
 *
 * void (*ndo_set_rx_mode)(struct net_device *dev);
 *	This function is called device changes address list filtering.
 *
 * void (*ndo_set_multicast_list)(struct net_device *dev);
 *	This function is called when the multicast address list changes.
 *
 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
 *	This function  is called when the Media Access Control address
527
 *	needs to be changed. If this interface is not defined, the
528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547
 *	mac address can not be changed.
 *
 * int (*ndo_validate_addr)(struct net_device *dev);
 *	Test if Media Access Control address is valid for the device.
 *
 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
 *	Called when a user request an ioctl which can't be handled by
 *	the generic interface code. If not defined ioctl's return
 *	not supported error code.
 *
 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
 *	Used to set network devices bus interface parameters. This interface
 *	is retained for legacy reason, new devices should use the bus
 *	interface (PCI) for low level management.
 *
 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
 *	Called when a user wants to change the Maximum Transfer Unit
 *	of a device. If not defined, any request to change MTU will
 *	will return an error.
 *
548
 * void (*ndo_tx_timeout)(struct net_device *dev);
549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572
 *	Callback uses when the transmitter has not made any progress
 *	for dev->watchdog ticks.
 *
 * struct net_device_stats* (*get_stats)(struct net_device *dev);
 *	Called when a user wants to get the network device usage
 *	statistics. If not defined, the counters in dev->stats will
 *	be used.
 *
 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
 *	If device support VLAN receive accleration
 *	(ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
 *	when vlan groups for the device changes.  Note: grp is NULL
 *	if no vlan's groups are being used.
 *
 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
 *	If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
 *	this function is called when a VLAN id is registered.
 *
 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
 *	If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
 *	this function is called when a VLAN id is unregistered.
 *
 * void (*ndo_poll_controller)(struct net_device *dev);
 */
573
#define HAVE_NET_DEVICE_OPS
574 575 576 577 578
struct net_device_ops {
	int			(*ndo_init)(struct net_device *dev);
	void			(*ndo_uninit)(struct net_device *dev);
	int			(*ndo_open)(struct net_device *dev);
	int			(*ndo_stop)(struct net_device *dev);
579 580 581 582
	int			(*ndo_start_xmit) (struct sk_buff *skb,
						   struct net_device *dev);
	u16			(*ndo_select_queue)(struct net_device *dev,
						    struct sk_buff *skb);
583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601
#define HAVE_CHANGE_RX_FLAGS
	void			(*ndo_change_rx_flags)(struct net_device *dev,
						       int flags);
#define HAVE_SET_RX_MODE
	void			(*ndo_set_rx_mode)(struct net_device *dev);
#define HAVE_MULTICAST
	void			(*ndo_set_multicast_list)(struct net_device *dev);
#define HAVE_SET_MAC_ADDR
	int			(*ndo_set_mac_address)(struct net_device *dev,
						       void *addr);
#define HAVE_VALIDATE_ADDR
	int			(*ndo_validate_addr)(struct net_device *dev);
#define HAVE_PRIVATE_IOCTL
	int			(*ndo_do_ioctl)(struct net_device *dev,
					        struct ifreq *ifr, int cmd);
#define HAVE_SET_CONFIG
	int			(*ndo_set_config)(struct net_device *dev,
					          struct ifmap *map);
#define HAVE_CHANGE_MTU
602 603 604 605
	int			(*ndo_change_mtu)(struct net_device *dev,
						  int new_mtu);
	int			(*ndo_neigh_setup)(struct net_device *dev,
						   struct neigh_parms *);
606 607 608 609 610 611 612 613 614 615 616 617 618 619 620
#define HAVE_TX_TIMEOUT
	void			(*ndo_tx_timeout) (struct net_device *dev);

	struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);

	void			(*ndo_vlan_rx_register)(struct net_device *dev,
						        struct vlan_group *grp);
	void			(*ndo_vlan_rx_add_vid)(struct net_device *dev,
						       unsigned short vid);
	void			(*ndo_vlan_rx_kill_vid)(struct net_device *dev,
						        unsigned short vid);
#ifdef CONFIG_NET_POLL_CONTROLLER
#define HAVE_NETDEV_POLL
	void                    (*ndo_poll_controller)(struct net_device *dev);
#endif
621 622 623 624 625 626 627 628
#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
	int			(*ndo_fcoe_ddp_setup)(struct net_device *dev,
						      u16 xid,
						      struct scatterlist *sgl,
						      unsigned int sgc);
	int			(*ndo_fcoe_ddp_done)(struct net_device *dev,
						     u16 xid);
#endif
629 630
};

L
Linus Torvalds 已提交
631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649
/*
 *	The DEVICE structure.
 *	Actually, this whole structure is a big mistake.  It mixes I/O
 *	data with strictly "high-level" data, and it has to know about
 *	almost every data structure used in the INET module.
 *
 *	FIXME: cleanup struct net_device such that network protocol info
 *	moves out.
 */

struct net_device
{

	/*
	 * This is the first field of the "visible" part of this structure
	 * (i.e. as seen by users in the "Space.c" file).  It is the name
	 * the interface.
	 */
	char			name[IFNAMSIZ];
650 651
	/* device name hash chain */
	struct hlist_node	name_hlist;
652 653
	/* snmp alias */
	char 			*ifalias;
L
Linus Torvalds 已提交
654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673

	/*
	 *	I/O specific fields
	 *	FIXME: Merge these and struct ifmap into one
	 */
	unsigned long		mem_end;	/* shared mem end	*/
	unsigned long		mem_start;	/* shared mem start	*/
	unsigned long		base_addr;	/* device I/O address	*/
	unsigned int		irq;		/* device IRQ number	*/

	/*
	 *	Some hardware also needs these fields, but they are not
	 *	part of the usual set specified in Space.c.
	 */

	unsigned char		if_port;	/* Selectable AUI, TP,..*/
	unsigned char		dma;		/* DMA channel		*/

	unsigned long		state;

674
	struct list_head	dev_list;
675
	struct list_head	napi_list;
L
Linus Torvalds 已提交
676

677 678 679
	/* Net device features */
	unsigned long		features;
#define NETIF_F_SG		1	/* Scatter/gather IO. */
680
#define NETIF_F_IP_CSUM		2	/* Can checksum TCP/UDP over IPv4. */
681 682
#define NETIF_F_NO_CSUM		4	/* Does not require checksum. F.e. loopack. */
#define NETIF_F_HW_CSUM		8	/* Can checksum all the packets. */
683
#define NETIF_F_IPV6_CSUM	16	/* Can checksum TCP/UDP over IPV6 */
684 685 686 687 688 689
#define NETIF_F_HIGHDMA		32	/* Can DMA to high memory. */
#define NETIF_F_FRAGLIST	64	/* Scatter/gather IO. */
#define NETIF_F_HW_VLAN_TX	128	/* Transmit VLAN hw acceleration */
#define NETIF_F_HW_VLAN_RX	256	/* Receive VLAN hw acceleration */
#define NETIF_F_HW_VLAN_FILTER	512	/* Receive filtering on VLAN */
#define NETIF_F_VLAN_CHALLENGED	1024	/* Device cannot handle VLAN packets */
H
Herbert Xu 已提交
690
#define NETIF_F_GSO		2048	/* Enable software GSO. */
691 692
#define NETIF_F_LLTX		4096	/* LockLess TX - deprecated. Please */
					/* do not use LLTX in new drivers */
693
#define NETIF_F_NETNS_LOCAL	8192	/* Does not change network namespaces */
694
#define NETIF_F_GRO		16384	/* Generic receive offload */
695
#define NETIF_F_LRO		32768	/* large receive offload */
696

697
/* the GSO_MASK reserves bits 16 through 23 */
698
#define NETIF_F_FCOE_CRC	(1 << 24) /* FCoE CRC32 */
699
#define NETIF_F_SCTP_CSUM	(1 << 25) /* SCTP checksum offload */
700

701
	/* Segmentation offload features */
702
#define NETIF_F_GSO_SHIFT	16
703
#define NETIF_F_GSO_MASK	0x00ff0000
704
#define NETIF_F_TSO		(SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
H
Herbert Xu 已提交
705
#define NETIF_F_UFO		(SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
706
#define NETIF_F_GSO_ROBUST	(SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
H
Herbert Xu 已提交
707 708
#define NETIF_F_TSO_ECN		(SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
#define NETIF_F_TSO6		(SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
709
#define NETIF_F_FSO		(SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
710

711 712 713
	/* List of features with software fallbacks. */
#define NETIF_F_GSO_SOFTWARE	(NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)

714

715
#define NETIF_F_GEN_CSUM	(NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
716 717 718
#define NETIF_F_V4_CSUM		(NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
#define NETIF_F_V6_CSUM		(NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
#define NETIF_F_ALL_CSUM	(NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
719

720 721 722 723 724
	/*
	 * If one device supports one of these features, then enable them
	 * for all in netdev_increment_features.
	 */
#define NETIF_F_ONE_FOR_ALL	(NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
725
				 NETIF_F_SG | NETIF_F_HIGHDMA |		\
726 727
				 NETIF_F_FRAGLIST)

L
Linus Torvalds 已提交
728 729 730 731
	/* Interface index. Unique device identifier	*/
	int			ifindex;
	int			iflink;

R
Rusty Russell 已提交
732
	struct net_device_stats	stats;
L
Linus Torvalds 已提交
733

734
#ifdef CONFIG_WIRELESS_EXT
L
Linus Torvalds 已提交
735 736 737 738 739
	/* List of functions to handle Wireless Extensions (instead of ioctl).
	 * See <net/iw_handler.h> for details. Jean II */
	const struct iw_handler_def *	wireless_handlers;
	/* Instance data managed by the core of Wireless Extensions. */
	struct iw_public_data *	wireless_data;
740
#endif
741 742
	/* Management operations */
	const struct net_device_ops *netdev_ops;
743
	const struct ethtool_ops *ethtool_ops;
L
Linus Torvalds 已提交
744

745 746 747
	/* Hardware header description */
	const struct header_ops *header_ops;

S
Stefan Rompf 已提交
748
	unsigned int		flags;	/* interface flags (a la BSD)	*/
L
Linus Torvalds 已提交
749 750 751 752
	unsigned short		gflags;
        unsigned short          priv_flags; /* Like 'flags' but invisible to userspace. */
	unsigned short		padded;	/* How much padding added by alloc_netdev() */

S
Stefan Rompf 已提交
753 754 755
	unsigned char		operstate; /* RFC2863 operstate */
	unsigned char		link_mode; /* mapping policy to operstate */

L
Linus Torvalds 已提交
756 757 758 759
	unsigned		mtu;	/* interface MTU value		*/
	unsigned short		type;	/* interface hardware type	*/
	unsigned short		hard_header_len;	/* hardware hdr length	*/

760 761 762 763 764 765 766
	/* extra head- and tailroom the hardware may need, but not in all cases
	 * can this be guaranteed, especially tailroom. Some cases also use
	 * LL_MAX_HEADER instead to allocate the skb.
	 */
	unsigned short		needed_headroom;
	unsigned short		needed_tailroom;

L
Linus Torvalds 已提交
767 768 769 770 771
	struct net_device	*master; /* Pointer to master device of a group,
					  * which this device is member of.
					  */

	/* Interface address info. */
772
	unsigned char		perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
L
Linus Torvalds 已提交
773 774 775
	unsigned char		addr_len;	/* hardware address length	*/
	unsigned short          dev_id;		/* for shared network cards */

776
	spinlock_t		addr_list_lock;
777 778 779
	struct dev_addr_list	*uc_list;	/* Secondary unicast mac addresses */
	int			uc_count;	/* Number of installed ucasts	*/
	int			uc_promisc;
780
	struct dev_addr_list	*mc_list;	/* Multicast mac addresses	*/
L
Linus Torvalds 已提交
781
	int			mc_count;	/* Number of installed mcasts	*/
782 783
	unsigned int		promiscuity;
	unsigned int		allmulti;
L
Linus Torvalds 已提交
784 785 786 787


	/* Protocol specific pointers */
	
788 789 790
#ifdef CONFIG_NET_DSA
	void			*dsa_ptr;	/* dsa specific data */
#endif
L
Linus Torvalds 已提交
791
	void 			*atalk_ptr;	/* AppleTalk link 	*/
G
Graf Yang 已提交
792
	void			*ip_ptr;	/* IPv4 specific data	*/
L
Linus Torvalds 已提交
793 794 795 796
	void                    *dn_ptr;        /* DECnet specific data */
	void                    *ip6_ptr;       /* IPv6 specific data */
	void			*ec_ptr;	/* Econet specific data	*/
	void			*ax25_ptr;	/* AX.25 specific data */
797 798
	struct wireless_dev	*ieee80211_ptr;	/* IEEE 802.11 specific data,
						   assign before registering */
L
Linus Torvalds 已提交
799

800 801 802 803 804
/*
 * Cache line mostly used on receive path (including eth_type_trans())
 */
	unsigned long		last_rx;	/* Time of last Rx	*/
	/* Interface address info used in eth_type_trans() */
805 806 807 808 809
	unsigned char		*dev_addr;	/* hw address, (before bcast
						   because most packets are
						   unicast) */

	struct list_head	dev_addr_list; /* list of device hw addresses */
810 811

	unsigned char		broadcast[MAX_ADDR_LEN];	/* hw bcast add	*/
L
Linus Torvalds 已提交
812

813
	struct netdev_queue	rx_queue;
814 815

	struct netdev_queue	*_tx ____cacheline_aligned_in_smp;
816 817

	/* Number of TX queues allocated at alloc_netdev_mq() time  */
818
	unsigned int		num_tx_queues;
819 820 821 822

	/* Number of TX queues currently active in device  */
	unsigned int		real_num_tx_queues;

L
Linus Torvalds 已提交
823
	unsigned long		tx_queue_len;	/* Max frames per queue allowed */
824
	spinlock_t		tx_global_lock;
825 826 827 828
/*
 * One part is mostly used on xmit path (device)
 */
	/* These may be needed for future network-power-down code. */
829 830 831 832 833

	/*
	 * trans_start here is expensive for high speed devices on SMP,
	 * please use netdev_queue->trans_start instead.
	 */
834 835 836 837 838
	unsigned long		trans_start;	/* Time (in jiffies) of last Tx	*/

	int			watchdog_timeo; /* used by dev_watchdog() */
	struct timer_list	watchdog_timer;

L
Linus Torvalds 已提交
839
	/* Number of references to this device */
840 841
	atomic_t		refcnt ____cacheline_aligned_in_smp;

L
Linus Torvalds 已提交
842 843 844 845 846
	/* delayed register/unregister */
	struct list_head	todo_list;
	/* device index hash chain */
	struct hlist_node	index_hlist;

847 848
	struct net_device	*link_watch_next;

L
Linus Torvalds 已提交
849 850
	/* register/unregister state machine */
	enum { NETREG_UNINITIALIZED=0,
851
	       NETREG_REGISTERED,	/* completed register_netdevice */
L
Linus Torvalds 已提交
852 853 854
	       NETREG_UNREGISTERING,	/* called unregister_netdevice */
	       NETREG_UNREGISTERED,	/* completed unregister todo */
	       NETREG_RELEASED,		/* called free_netdev */
855
	       NETREG_DUMMY,		/* dummy device for NAPI poll */
L
Linus Torvalds 已提交
856 857
	} reg_state;

858 859
	/* Called from unregister, can be used to call free_netdev */
	void (*destructor)(struct net_device *dev);
L
Linus Torvalds 已提交
860 861

#ifdef CONFIG_NETPOLL
862
	struct netpoll_info	*npinfo;
L
Linus Torvalds 已提交
863
#endif
864

865
#ifdef CONFIG_NET_NS
866 867
	/* Network namespace this network device is inside */
	struct net		*nd_net;
868
#endif
869

D
David S. Miller 已提交
870 871 872
	/* mid-layer private */
	void			*ml_priv;

L
Linus Torvalds 已提交
873 874
	/* bridge stuff */
	struct net_bridge_port	*br_port;
P
Patrick McHardy 已提交
875 876
	/* macvlan */
	struct macvlan_port	*macvlan_port;
877 878
	/* GARP */
	struct garp_port	*garp_port;
L
Linus Torvalds 已提交
879 880

	/* class/net/name entry */
881
	struct device		dev;
882 883
	/* space for optional statistics and wireless sysfs groups */
	struct attribute_group  *sysfs_groups[3];
P
Patrick McHardy 已提交
884 885 886

	/* rtnetlink link ops */
	const struct rtnl_link_ops *rtnl_link_ops;
887

888 889 890
	/* VLAN feature mask */
	unsigned long vlan_features;

891 892 893
	/* for setting kernel sock attribute on TCP connection setup */
#define GSO_MAX_SIZE		65536
	unsigned int		gso_max_size;
894

J
Jeff Kirsher 已提交
895
#ifdef CONFIG_DCB
896 897 898 899
	/* Data Center Bridging netlink ops */
	struct dcbnl_rtnl_ops *dcbnl_ops;
#endif

900 901 902 903
#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
	/* max exchange id for FCoE LRO by ddp */
	unsigned int		fcoe_ddp_xid;
#endif
L
Linus Torvalds 已提交
904
};
905
#define to_net_dev(d) container_of(d, struct net_device, dev)
L
Linus Torvalds 已提交
906 907 908 909

#define	NETDEV_ALIGN		32
#define	NETDEV_ALIGN_CONST	(NETDEV_ALIGN - 1)

910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928
static inline
struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
					 unsigned int index)
{
	return &dev->_tx[index];
}

static inline void netdev_for_each_tx_queue(struct net_device *dev,
					    void (*f)(struct net_device *,
						      struct netdev_queue *,
						      void *),
					    void *arg)
{
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++)
		f(dev, &dev->_tx[i], arg);
}

929 930 931 932 933 934 935 936 937 938 939 940 941 942
/*
 * Net namespace inlines
 */
static inline
struct net *dev_net(const struct net_device *dev)
{
#ifdef CONFIG_NET_NS
	return dev->nd_net;
#else
	return &init_net;
#endif
}

static inline
943
void dev_net_set(struct net_device *dev, struct net *net)
944 945
{
#ifdef CONFIG_NET_NS
946 947
	release_net(dev->nd_net);
	dev->nd_net = hold_net(net);
948 949 950
#endif
}

951 952 953 954 955 956 957 958 959 960
static inline bool netdev_uses_dsa_tags(struct net_device *dev)
{
#ifdef CONFIG_NET_DSA_TAG_DSA
	if (dev->dsa_ptr != NULL)
		return dsa_uses_dsa_tags(dev->dsa_ptr);
#endif

	return 0;
}

961 962 963 964 965 966 967 968 969 970
static inline bool netdev_uses_trailer_tags(struct net_device *dev)
{
#ifdef CONFIG_NET_DSA_TAG_TRAILER
	if (dev->dsa_ptr != NULL)
		return dsa_uses_trailer_tags(dev->dsa_ptr);
#endif

	return 0;
}

971 972 973 974 975 976
/**
 *	netdev_priv - access network device private data
 *	@dev: network device
 *
 * Get network device private data
 */
977
static inline void *netdev_priv(const struct net_device *dev)
L
Linus Torvalds 已提交
978
{
979 980 981
	return (char *)dev + ((sizeof(struct net_device)
			       + NETDEV_ALIGN_CONST)
			      & ~NETDEV_ALIGN_CONST);
L
Linus Torvalds 已提交
982 983 984 985 986
}

/* Set the sysfs physical device reference for the network logical device
 * if set prior to registration will cause a symlink during initialization.
 */
987
#define SET_NETDEV_DEV(net, pdev)	((net)->dev.parent = (pdev))
L
Linus Torvalds 已提交
988

989 990 991 992 993 994 995 996 997 998
/**
 *	netif_napi_add - initialize a napi context
 *	@dev:  network device
 *	@napi: napi context
 *	@poll: polling function
 *	@weight: default weight
 *
 * netif_napi_add() must be used to initialize a napi context prior to calling
 * *any* of the other napi related functions.
 */
999 1000
void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
		    int (*poll)(struct napi_struct *, int), int weight);
1001

1002 1003 1004 1005 1006 1007
/**
 *  netif_napi_del - remove a napi context
 *  @napi: napi context
 *
 *  netif_napi_del() removes a napi context from the network device napi list
 */
1008 1009 1010
void netif_napi_del(struct napi_struct *napi);

struct napi_gro_cb {
1011 1012 1013
	/* This indicates where we are processing relative to skb->data. */
	int data_offset;

1014 1015 1016 1017 1018 1019 1020 1021
	/* This is non-zero if the packet may be of the same flow. */
	int same_flow;

	/* This is non-zero if the packet cannot be merged with the new skb. */
	int flush;

	/* Number of segments aggregated. */
	int count;
H
Herbert Xu 已提交
1022 1023 1024

	/* Free the skb? */
	int free;
1025 1026 1027
};

#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1028

L
Linus Torvalds 已提交
1029
struct packet_type {
D
David S. Miller 已提交
1030 1031 1032 1033 1034 1035
	__be16			type;	/* This is really htons(ether_type). */
	struct net_device	*dev;	/* NULL is wildcarded here	     */
	int			(*func) (struct sk_buff *,
					 struct net_device *,
					 struct packet_type *,
					 struct net_device *);
1036 1037
	struct sk_buff		*(*gso_segment)(struct sk_buff *skb,
						int features);
1038
	int			(*gso_send_check)(struct sk_buff *skb);
1039 1040 1041
	struct sk_buff		**(*gro_receive)(struct sk_buff **head,
					       struct sk_buff *skb);
	int			(*gro_complete)(struct sk_buff *skb);
L
Linus Torvalds 已提交
1042 1043 1044 1045 1046 1047 1048 1049 1050
	void			*af_packet_priv;
	struct list_head	list;
};

#include <linux/interrupt.h>
#include <linux/notifier.h>

extern rwlock_t				dev_base_lock;		/* Device list lock */

1051

1052 1053 1054 1055 1056 1057 1058
#define for_each_netdev(net, d)		\
		list_for_each_entry(d, &(net)->dev_base_head, dev_list)
#define for_each_netdev_safe(net, d, n)	\
		list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
#define for_each_netdev_continue(net, d)		\
		list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
#define net_device_entry(lh)	list_entry(lh, struct net_device, dev_list)
1059

1060 1061 1062 1063 1064
static inline struct net_device *next_net_device(struct net_device *dev)
{
	struct list_head *lh;
	struct net *net;

1065
	net = dev_net(dev);
1066 1067 1068 1069 1070 1071 1072 1073 1074
	lh = dev->dev_list.next;
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

static inline struct net_device *first_net_device(struct net *net)
{
	return list_empty(&net->dev_base_head) ? NULL :
		net_device_entry(net->dev_base_head.next);
}
1075

L
Linus Torvalds 已提交
1076 1077
extern int 			netdev_boot_setup_check(struct net_device *dev);
extern unsigned long		netdev_boot_base(const char *prefix, int unit);
1078 1079 1080
extern struct net_device    *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
L
Linus Torvalds 已提交
1081 1082 1083 1084
extern void		dev_add_pack(struct packet_type *pt);
extern void		dev_remove_pack(struct packet_type *pt);
extern void		__dev_remove_pack(struct packet_type *pt);

1085
extern struct net_device	*dev_get_by_flags(struct net *net, unsigned short flags,
L
Linus Torvalds 已提交
1086
						  unsigned short mask);
1087 1088
extern struct net_device	*dev_get_by_name(struct net *net, const char *name);
extern struct net_device	*__dev_get_by_name(struct net *net, const char *name);
L
Linus Torvalds 已提交
1089 1090 1091
extern int		dev_alloc_name(struct net_device *dev, const char *name);
extern int		dev_open(struct net_device *dev);
extern int		dev_close(struct net_device *dev);
1092
extern void		dev_disable_lro(struct net_device *dev);
L
Linus Torvalds 已提交
1093 1094
extern int		dev_queue_xmit(struct sk_buff *skb);
extern int		register_netdevice(struct net_device *dev);
1095
extern void		unregister_netdevice(struct net_device *dev);
L
Linus Torvalds 已提交
1096 1097 1098 1099
extern void		free_netdev(struct net_device *dev);
extern void		synchronize_net(void);
extern int 		register_netdevice_notifier(struct notifier_block *nb);
extern int		unregister_netdevice_notifier(struct notifier_block *nb);
1100
extern int		init_dummy_netdev(struct net_device *dev);
1101
extern void		netdev_resync_ops(struct net_device *dev);
1102

1103
extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1104 1105
extern struct net_device	*dev_get_by_index(struct net *net, int ifindex);
extern struct net_device	*__dev_get_by_index(struct net *net, int ifindex);
L
Linus Torvalds 已提交
1106 1107 1108 1109
extern int		dev_restart(struct net_device *dev);
#ifdef CONFIG_NETPOLL_TRAP
extern int		netpoll_trap(void);
#endif
1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132
extern void	      *skb_gro_header(struct sk_buff *skb, unsigned int hlen);
extern int	       skb_gro_receive(struct sk_buff **head,
				       struct sk_buff *skb);

static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
{
	return NAPI_GRO_CB(skb)->data_offset;
}

static inline unsigned int skb_gro_len(const struct sk_buff *skb)
{
	return skb->len - NAPI_GRO_CB(skb)->data_offset;
}

static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
{
	NAPI_GRO_CB(skb)->data_offset += len;
}

static inline void skb_gro_reset_offset(struct sk_buff *skb)
{
	NAPI_GRO_CB(skb)->data_offset = 0;
}
L
Linus Torvalds 已提交
1133

1134 1135
static inline void *skb_gro_mac_header(struct sk_buff *skb)
{
1136
	return skb_headlen(skb) ? skb_mac_header(skb) :
1137 1138 1139 1140
	       page_address(skb_shinfo(skb)->frags[0].page) +
	       skb_shinfo(skb)->frags[0].page_offset;
}

H
Herbert Xu 已提交
1141 1142 1143 1144 1145 1146 1147
static inline void *skb_gro_network_header(struct sk_buff *skb)
{
	return skb_headlen(skb) ? skb_network_header(skb) :
	       page_address(skb_shinfo(skb)->frags[0].page) +
	       skb_shinfo(skb)->frags[0].page_offset + skb_network_offset(skb);
}

1148 1149
static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
				  unsigned short type,
1150 1151
				  const void *daddr, const void *saddr,
				  unsigned len)
1152
{
1153
	if (!dev->header_ops || !dev->header_ops->create)
1154
		return 0;
1155 1156

	return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1157 1158
}

S
Stephen Hemminger 已提交
1159 1160 1161 1162 1163
static inline int dev_parse_header(const struct sk_buff *skb,
				   unsigned char *haddr)
{
	const struct net_device *dev = skb->dev;

1164
	if (!dev->header_ops || !dev->header_ops->parse)
S
Stephen Hemminger 已提交
1165
		return 0;
1166
	return dev->header_ops->parse(skb, haddr);
S
Stephen Hemminger 已提交
1167 1168
}

L
Linus Torvalds 已提交
1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181
typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
extern int		register_gifconf(unsigned int family, gifconf_func_t * gifconf);
static inline int unregister_gifconf(unsigned int family)
{
	return register_gifconf(family, NULL);
}

/*
 * Incoming packets are placed on per-cpu queues so that
 * no locking is needed.
 */
struct softnet_data
{
1182
	struct Qdisc		*output_queue;
L
Linus Torvalds 已提交
1183 1184 1185 1186
	struct sk_buff_head	input_pkt_queue;
	struct list_head	poll_list;
	struct sk_buff		*completion_queue;

1187
	struct napi_struct	backlog;
L
Linus Torvalds 已提交
1188 1189 1190 1191 1192 1193
};

DECLARE_PER_CPU(struct softnet_data,softnet_data);

#define HAVE_NETIF_QUEUE

1194
extern void __netif_schedule(struct Qdisc *q);
L
Linus Torvalds 已提交
1195

1196
static inline void netif_schedule_queue(struct netdev_queue *txq)
L
Linus Torvalds 已提交
1197
{
1198
	if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1199
		__netif_schedule(txq->qdisc);
1200 1201
}

1202 1203 1204 1205 1206 1207 1208 1209
static inline void netif_tx_schedule_all(struct net_device *dev)
{
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++)
		netif_schedule_queue(netdev_get_tx_queue(dev, i));
}

1210 1211 1212 1213 1214
static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
{
	clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
}

1215 1216 1217 1218 1219 1220
/**
 *	netif_start_queue - allow transmit
 *	@dev: network device
 *
 *	Allow upper layers to call the device hard_start_xmit routine.
 */
L
Linus Torvalds 已提交
1221 1222
static inline void netif_start_queue(struct net_device *dev)
{
1223
	netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1224 1225
}

1226 1227 1228 1229 1230 1231 1232 1233 1234 1235
static inline void netif_tx_start_all_queues(struct net_device *dev)
{
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
		netif_tx_start_queue(txq);
	}
}

1236
static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
L
Linus Torvalds 已提交
1237 1238
{
#ifdef CONFIG_NETPOLL_TRAP
1239
	if (netpoll_trap()) {
1240
		clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
L
Linus Torvalds 已提交
1241
		return;
1242
	}
L
Linus Torvalds 已提交
1243
#endif
1244
	if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1245
		__netif_schedule(dev_queue->qdisc);
1246 1247
}

1248 1249 1250 1251 1252 1253 1254
/**
 *	netif_wake_queue - restart transmit
 *	@dev: network device
 *
 *	Allow upper layers to call the device hard_start_xmit routine.
 *	Used for flow control when transmit resources are available.
 */
1255 1256
static inline void netif_wake_queue(struct net_device *dev)
{
1257
	netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1258 1259
}

1260 1261 1262 1263 1264 1265 1266 1267 1268 1269
static inline void netif_tx_wake_all_queues(struct net_device *dev)
{
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
		netif_tx_wake_queue(txq);
	}
}

1270 1271 1272 1273 1274
static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
{
	set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
}

1275 1276 1277 1278 1279 1280 1281
/**
 *	netif_stop_queue - stop transmitted packets
 *	@dev: network device
 *
 *	Stop upper layers calling the device hard_start_xmit routine.
 *	Used for flow control when transmit resources are unavailable.
 */
L
Linus Torvalds 已提交
1282 1283
static inline void netif_stop_queue(struct net_device *dev)
{
1284
	netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1285 1286
}

1287 1288 1289 1290 1291 1292 1293 1294 1295 1296
static inline void netif_tx_stop_all_queues(struct net_device *dev)
{
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
		netif_tx_stop_queue(txq);
	}
}

1297 1298 1299 1300 1301
static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
{
	return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
}

1302 1303 1304 1305 1306 1307
/**
 *	netif_queue_stopped - test if transmit queue is flowblocked
 *	@dev: network device
 *
 *	Test if transmit queue on device is currently unable to send.
 */
L
Linus Torvalds 已提交
1308 1309
static inline int netif_queue_stopped(const struct net_device *dev)
{
1310
	return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1311 1312
}

1313 1314 1315 1316 1317
static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
{
	return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
}

1318 1319 1320 1321 1322 1323
/**
 *	netif_running - test if up
 *	@dev: network device
 *
 *	Test if the device has been brought up.
 */
L
Linus Torvalds 已提交
1324 1325 1326 1327 1328
static inline int netif_running(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_START, &dev->state);
}

1329 1330 1331 1332 1333 1334
/*
 * Routines to manage the subqueues on a device.  We only need start
 * stop, and a check if it's stopped.  All other device management is
 * done at the overall netdevice level.
 * Also test the device if we're multiqueue.
 */
1335 1336 1337 1338 1339 1340 1341 1342

/**
 *	netif_start_subqueue - allow sending packets on subqueue
 *	@dev: network device
 *	@queue_index: sub queue index
 *
 * Start individual transmit queue of a device with multiple transmit queues.
 */
1343 1344
static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
{
1345 1346
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
	clear_bit(__QUEUE_STATE_XOFF, &txq->state);
1347 1348
}

1349 1350 1351 1352 1353 1354 1355
/**
 *	netif_stop_subqueue - stop sending packets on subqueue
 *	@dev: network device
 *	@queue_index: sub queue index
 *
 * Stop individual transmit queue of a device with multiple transmit queues.
 */
1356 1357
static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
{
1358
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1359 1360 1361 1362
#ifdef CONFIG_NETPOLL_TRAP
	if (netpoll_trap())
		return;
#endif
1363
	set_bit(__QUEUE_STATE_XOFF, &txq->state);
1364 1365
}

1366 1367 1368 1369 1370 1371 1372
/**
 *	netif_subqueue_stopped - test status of subqueue
 *	@dev: network device
 *	@queue_index: sub queue index
 *
 * Check individual transmit queue of a device with multiple transmit queues.
 */
1373
static inline int __netif_subqueue_stopped(const struct net_device *dev,
1374 1375
					 u16 queue_index)
{
1376 1377
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
	return test_bit(__QUEUE_STATE_XOFF, &txq->state);
1378 1379
}

1380 1381 1382 1383 1384
static inline int netif_subqueue_stopped(const struct net_device *dev,
					 struct sk_buff *skb)
{
	return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
}
1385 1386 1387 1388 1389 1390 1391 1392

/**
 *	netif_wake_subqueue - allow sending packets on subqueue
 *	@dev: network device
 *	@queue_index: sub queue index
 *
 * Resume individual transmit queue of a device with multiple transmit queues.
 */
1393 1394
static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
{
1395
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1396 1397 1398 1399
#ifdef CONFIG_NETPOLL_TRAP
	if (netpoll_trap())
		return;
#endif
1400
	if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1401
		__netif_schedule(txq->qdisc);
1402 1403
}

1404 1405 1406 1407 1408 1409
/**
 *	netif_is_multiqueue - test if device has multiple transmit queues
 *	@dev: network device
 *
 * Check if device has multiple transmit queues
 */
1410 1411
static inline int netif_is_multiqueue(const struct net_device *dev)
{
1412
	return (dev->num_tx_queues > 1);
1413
}
L
Linus Torvalds 已提交
1414 1415

/* Use this variant when it is known for sure that it
1416 1417
 * is executing from hardware interrupt context or with hardware interrupts
 * disabled.
L
Linus Torvalds 已提交
1418
 */
1419
extern void dev_kfree_skb_irq(struct sk_buff *skb);
L
Linus Torvalds 已提交
1420 1421

/* Use this variant in places where it could be invoked
1422 1423
 * from either hardware interrupt or other context, with hardware interrupts
 * either disabled or enabled.
L
Linus Torvalds 已提交
1424
 */
1425
extern void dev_kfree_skb_any(struct sk_buff *skb);
L
Linus Torvalds 已提交
1426 1427 1428 1429 1430 1431

#define HAVE_NETIF_RX 1
extern int		netif_rx(struct sk_buff *skb);
extern int		netif_rx_ni(struct sk_buff *skb);
#define HAVE_NETIF_RECEIVE_SKB 1
extern int		netif_receive_skb(struct sk_buff *skb);
1432
extern void		napi_gro_flush(struct napi_struct *napi);
1433 1434
extern int		dev_gro_receive(struct napi_struct *napi,
					struct sk_buff *skb);
1435
extern int		napi_skb_finish(int ret, struct sk_buff *skb);
1436 1437
extern int		napi_gro_receive(struct napi_struct *napi,
					 struct sk_buff *skb);
1438 1439
extern void		napi_reuse_skb(struct napi_struct *napi,
				       struct sk_buff *skb);
1440
extern struct sk_buff *	napi_get_frags(struct napi_struct *napi);
1441 1442
extern int		napi_frags_finish(struct napi_struct *napi,
					  struct sk_buff *skb, int ret);
1443 1444 1445 1446 1447 1448 1449 1450 1451
extern struct sk_buff *	napi_frags_skb(struct napi_struct *napi);
extern int		napi_gro_frags(struct napi_struct *napi);

static inline void napi_free_frags(struct napi_struct *napi)
{
	kfree_skb(napi->skb);
	napi->skb = NULL;
}

1452
extern void		netif_nit_deliver(struct sk_buff *skb);
1453
extern int		dev_valid_name(const char *name);
1454 1455
extern int		dev_ioctl(struct net *net, unsigned int cmd, void __user *);
extern int		dev_ethtool(struct net *net, struct ifreq *);
L
Linus Torvalds 已提交
1456 1457
extern unsigned		dev_get_flags(const struct net_device *);
extern int		dev_change_flags(struct net_device *, unsigned);
1458
extern int		dev_change_name(struct net_device *, const char *);
1459
extern int		dev_set_alias(struct net_device *, const char *, size_t);
1460 1461
extern int		dev_change_net_namespace(struct net_device *,
						 struct net *, const char *);
L
Linus Torvalds 已提交
1462 1463 1464
extern int		dev_set_mtu(struct net_device *, int);
extern int		dev_set_mac_address(struct net_device *,
					    struct sockaddr *);
1465
extern int		dev_hard_start_xmit(struct sk_buff *skb,
1466 1467
					    struct net_device *dev,
					    struct netdev_queue *txq);
L
Linus Torvalds 已提交
1468

1469
extern int		netdev_budget;
L
Linus Torvalds 已提交
1470 1471 1472 1473

/* Called by rtnetlink.c:rtnl_unlock() */
extern void netdev_run_todo(void);

1474 1475 1476 1477
/**
 *	dev_put - release reference to device
 *	@dev: network device
 *
1478
 * Release reference to device to allow it to be freed.
1479
 */
L
Linus Torvalds 已提交
1480 1481 1482 1483 1484
static inline void dev_put(struct net_device *dev)
{
	atomic_dec(&dev->refcnt);
}

1485 1486 1487 1488
/**
 *	dev_hold - get reference to device
 *	@dev: network device
 *
1489
 * Hold reference to device to keep it from being freed.
1490
 */
1491 1492 1493 1494
static inline void dev_hold(struct net_device *dev)
{
	atomic_inc(&dev->refcnt);
}
L
Linus Torvalds 已提交
1495 1496 1497 1498

/* Carrier loss detection, dial on demand. The functions netif_carrier_on
 * and _off may be called from IRQ context, but it is caller
 * who is responsible for serialization of these calls.
S
Stefan Rompf 已提交
1499 1500 1501 1502
 *
 * The name carrier is inappropriate, these functions should really be
 * called netif_lowerlayer_*() because they represent the state of any
 * kind of lower layer not just hardware media.
L
Linus Torvalds 已提交
1503 1504 1505 1506
 */

extern void linkwatch_fire_event(struct net_device *dev);

1507 1508 1509 1510 1511 1512
/**
 *	netif_carrier_ok - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
L
Linus Torvalds 已提交
1513 1514 1515 1516 1517
static inline int netif_carrier_ok(const struct net_device *dev)
{
	return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
}

1518 1519
extern unsigned long dev_trans_start(struct net_device *dev);

L
Linus Torvalds 已提交
1520 1521
extern void __netdev_watchdog_up(struct net_device *dev);

1522
extern void netif_carrier_on(struct net_device *dev);
L
Linus Torvalds 已提交
1523

1524
extern void netif_carrier_off(struct net_device *dev);
L
Linus Torvalds 已提交
1525

1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538
/**
 *	netif_dormant_on - mark device as dormant.
 *	@dev: network device
 *
 * Mark device as dormant (as per RFC2863).
 *
 * The dormant state indicates that the relevant interface is not
 * actually in a condition to pass packets (i.e., it is not 'up') but is
 * in a "pending" state, waiting for some external event.  For "on-
 * demand" interfaces, this new state identifies the situation where the
 * interface is waiting for events to place it in the up state.
 *
 */
S
Stefan Rompf 已提交
1539 1540 1541 1542 1543 1544
static inline void netif_dormant_on(struct net_device *dev)
{
	if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

1545 1546 1547 1548 1549 1550
/**
 *	netif_dormant_off - set device as not dormant.
 *	@dev: network device
 *
 * Device is not in dormant state.
 */
S
Stefan Rompf 已提交
1551 1552 1553 1554 1555 1556
static inline void netif_dormant_off(struct net_device *dev)
{
	if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

1557 1558 1559 1560 1561 1562
/**
 *	netif_dormant - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
S
Stefan Rompf 已提交
1563 1564 1565 1566 1567 1568
static inline int netif_dormant(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_DORMANT, &dev->state);
}


1569 1570 1571 1572 1573 1574
/**
 *	netif_oper_up - test if device is operational
 *	@dev: network device
 *
 * Check if carrier is operational
 */
S
Stefan Rompf 已提交
1575 1576 1577 1578 1579
static inline int netif_oper_up(const struct net_device *dev) {
	return (dev->operstate == IF_OPER_UP ||
		dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
}

1580 1581 1582 1583 1584 1585
/**
 *	netif_device_present - is device available or removed
 *	@dev: network device
 *
 * Check if device has not been removed from system.
 */
L
Linus Torvalds 已提交
1586 1587 1588 1589 1590
static inline int netif_device_present(struct net_device *dev)
{
	return test_bit(__LINK_STATE_PRESENT, &dev->state);
}

1591
extern void netif_device_detach(struct net_device *dev);
L
Linus Torvalds 已提交
1592

1593
extern void netif_device_attach(struct net_device *dev);
L
Linus Torvalds 已提交
1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644

/*
 * Network interface message level settings
 */
#define HAVE_NETIF_MSG 1

enum {
	NETIF_MSG_DRV		= 0x0001,
	NETIF_MSG_PROBE		= 0x0002,
	NETIF_MSG_LINK		= 0x0004,
	NETIF_MSG_TIMER		= 0x0008,
	NETIF_MSG_IFDOWN	= 0x0010,
	NETIF_MSG_IFUP		= 0x0020,
	NETIF_MSG_RX_ERR	= 0x0040,
	NETIF_MSG_TX_ERR	= 0x0080,
	NETIF_MSG_TX_QUEUED	= 0x0100,
	NETIF_MSG_INTR		= 0x0200,
	NETIF_MSG_TX_DONE	= 0x0400,
	NETIF_MSG_RX_STATUS	= 0x0800,
	NETIF_MSG_PKTDATA	= 0x1000,
	NETIF_MSG_HW		= 0x2000,
	NETIF_MSG_WOL		= 0x4000,
};

#define netif_msg_drv(p)	((p)->msg_enable & NETIF_MSG_DRV)
#define netif_msg_probe(p)	((p)->msg_enable & NETIF_MSG_PROBE)
#define netif_msg_link(p)	((p)->msg_enable & NETIF_MSG_LINK)
#define netif_msg_timer(p)	((p)->msg_enable & NETIF_MSG_TIMER)
#define netif_msg_ifdown(p)	((p)->msg_enable & NETIF_MSG_IFDOWN)
#define netif_msg_ifup(p)	((p)->msg_enable & NETIF_MSG_IFUP)
#define netif_msg_rx_err(p)	((p)->msg_enable & NETIF_MSG_RX_ERR)
#define netif_msg_tx_err(p)	((p)->msg_enable & NETIF_MSG_TX_ERR)
#define netif_msg_tx_queued(p)	((p)->msg_enable & NETIF_MSG_TX_QUEUED)
#define netif_msg_intr(p)	((p)->msg_enable & NETIF_MSG_INTR)
#define netif_msg_tx_done(p)	((p)->msg_enable & NETIF_MSG_TX_DONE)
#define netif_msg_rx_status(p)	((p)->msg_enable & NETIF_MSG_RX_STATUS)
#define netif_msg_pktdata(p)	((p)->msg_enable & NETIF_MSG_PKTDATA)
#define netif_msg_hw(p)		((p)->msg_enable & NETIF_MSG_HW)
#define netif_msg_wol(p)	((p)->msg_enable & NETIF_MSG_WOL)

static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
{
	/* use default */
	if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
		return default_msg_enable_bits;
	if (debug_value == 0)	/* no output */
		return 0;
	/* set low N bits */
	return (1 << debug_value) - 1;
}

1645
static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
H
Herbert Xu 已提交
1646
{
1647 1648
	spin_lock(&txq->_xmit_lock);
	txq->xmit_lock_owner = cpu;
1649 1650
}

1651 1652 1653 1654 1655 1656
static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
{
	spin_lock_bh(&txq->_xmit_lock);
	txq->xmit_lock_owner = smp_processor_id();
}

1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676
static inline int __netif_tx_trylock(struct netdev_queue *txq)
{
	int ok = spin_trylock(&txq->_xmit_lock);
	if (likely(ok))
		txq->xmit_lock_owner = smp_processor_id();
	return ok;
}

static inline void __netif_tx_unlock(struct netdev_queue *txq)
{
	txq->xmit_lock_owner = -1;
	spin_unlock(&txq->_xmit_lock);
}

static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
{
	txq->xmit_lock_owner = -1;
	spin_unlock_bh(&txq->_xmit_lock);
}

1677 1678 1679 1680 1681 1682
/**
 *	netif_tx_lock - grab network device transmit lock
 *	@dev: network device
 *
 * Get network device transmit lock
 */
1683 1684
static inline void netif_tx_lock(struct net_device *dev)
{
1685
	unsigned int i;
1686
	int cpu;
1687

1688 1689
	spin_lock(&dev->tx_global_lock);
	cpu = smp_processor_id();
1690 1691
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1692 1693 1694 1695 1696 1697 1698

		/* We are the only thread of execution doing a
		 * freeze, but we have to grab the _xmit_lock in
		 * order to synchronize with threads which are in
		 * the ->hard_start_xmit() handler and already
		 * checked the frozen bit.
		 */
1699
		__netif_tx_lock(txq, cpu);
1700 1701
		set_bit(__QUEUE_STATE_FROZEN, &txq->state);
		__netif_tx_unlock(txq);
1702
	}
H
Herbert Xu 已提交
1703 1704 1705 1706
}

static inline void netif_tx_lock_bh(struct net_device *dev)
{
1707 1708
	local_bh_disable();
	netif_tx_lock(dev);
H
Herbert Xu 已提交
1709 1710 1711 1712
}

static inline void netif_tx_unlock(struct net_device *dev)
{
1713 1714 1715 1716
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1717

1718 1719 1720 1721 1722 1723 1724 1725 1726
		/* No need to grab the _xmit_lock here.  If the
		 * queue is not stopped for another reason, we
		 * force a schedule.
		 */
		clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
		if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
			__netif_schedule(txq->qdisc);
	}
	spin_unlock(&dev->tx_global_lock);
H
Herbert Xu 已提交
1727 1728 1729 1730
}

static inline void netif_tx_unlock_bh(struct net_device *dev)
{
1731 1732
	netif_tx_unlock(dev);
	local_bh_enable();
H
Herbert Xu 已提交
1733 1734
}

1735
#define HARD_TX_LOCK(dev, txq, cpu) {			\
1736
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
1737
		__netif_tx_lock(txq, cpu);		\
1738 1739 1740
	}						\
}

1741
#define HARD_TX_UNLOCK(dev, txq) {			\
1742
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
1743
		__netif_tx_unlock(txq);			\
1744 1745 1746
	}						\
}

L
Linus Torvalds 已提交
1747 1748
static inline void netif_tx_disable(struct net_device *dev)
{
1749
	unsigned int i;
1750
	int cpu;
1751

1752 1753
	local_bh_disable();
	cpu = smp_processor_id();
1754 1755
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1756 1757

		__netif_tx_lock(txq, cpu);
1758
		netif_tx_stop_queue(txq);
1759
		__netif_tx_unlock(txq);
1760
	}
1761
	local_bh_enable();
L
Linus Torvalds 已提交
1762 1763
}

1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783
static inline void netif_addr_lock(struct net_device *dev)
{
	spin_lock(&dev->addr_list_lock);
}

static inline void netif_addr_lock_bh(struct net_device *dev)
{
	spin_lock_bh(&dev->addr_list_lock);
}

static inline void netif_addr_unlock(struct net_device *dev)
{
	spin_unlock(&dev->addr_list_lock);
}

static inline void netif_addr_unlock_bh(struct net_device *dev)
{
	spin_unlock_bh(&dev->addr_list_lock);
}

1784 1785 1786 1787 1788 1789 1790
/*
 * dev_addr_list walker. Should be used only for read access. Call with
 * rcu_read_lock held.
 */
#define for_each_dev_addr(dev, ha) \
		list_for_each_entry_rcu(ha, &dev->dev_addr_list, list)

L
Linus Torvalds 已提交
1791 1792 1793 1794 1795
/* These functions live elsewhere (drivers/net/net_init.c, but related) */

extern void		ether_setup(struct net_device *dev);

/* Support for loadable net-drivers */
1796 1797 1798 1799 1800
extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
				       void (*setup)(struct net_device *),
				       unsigned int queue_count);
#define alloc_netdev(sizeof_priv, name, setup) \
	alloc_netdev_mq(sizeof_priv, name, setup, 1)
L
Linus Torvalds 已提交
1801 1802
extern int		register_netdev(struct net_device *dev);
extern void		unregister_netdev(struct net_device *dev);
1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815

/* Functions used for device addresses handling */
extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
			unsigned char addr_type);
extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
			unsigned char addr_type);
extern int dev_addr_add_multiple(struct net_device *to_dev,
				 struct net_device *from_dev,
				 unsigned char addr_type);
extern int dev_addr_del_multiple(struct net_device *to_dev,
				 struct net_device *from_dev,
				 unsigned char addr_type);

1816 1817 1818 1819 1820
/* Functions used for secondary unicast and multicast support */
extern void		dev_set_rx_mode(struct net_device *dev);
extern void		__dev_set_rx_mode(struct net_device *dev);
extern int		dev_unicast_delete(struct net_device *dev, void *addr, int alen);
extern int		dev_unicast_add(struct net_device *dev, void *addr, int alen);
1821 1822
extern int		dev_unicast_sync(struct net_device *to, struct net_device *from);
extern void		dev_unicast_unsync(struct net_device *to, struct net_device *from);
L
Linus Torvalds 已提交
1823 1824
extern int 		dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
extern int		dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1825 1826
extern int		dev_mc_sync(struct net_device *to, struct net_device *from);
extern void		dev_mc_unsync(struct net_device *to, struct net_device *from);
1827 1828
extern int 		__dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
extern int		__dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1829 1830
extern int		__dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
extern void		__dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1831 1832
extern int		dev_set_promiscuity(struct net_device *dev, int inc);
extern int		dev_set_allmulti(struct net_device *dev, int inc);
L
Linus Torvalds 已提交
1833
extern void		netdev_state_change(struct net_device *dev);
1834
extern void		netdev_bonding_change(struct net_device *dev);
1835
extern void		netdev_features_change(struct net_device *dev);
L
Linus Torvalds 已提交
1836
/* Load a device via the kmod */
1837
extern void		dev_load(struct net *net, const char *name);
L
Linus Torvalds 已提交
1838
extern void		dev_mcast_init(void);
1839 1840
extern const struct net_device_stats *dev_get_stats(struct net_device *dev);

L
Linus Torvalds 已提交
1841 1842 1843
extern int		netdev_max_backlog;
extern int		weight_p;
extern int		netdev_set_master(struct net_device *dev, struct net_device *master);
1844
extern int skb_checksum_help(struct sk_buff *skb);
1845
extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1846 1847 1848 1849 1850 1851 1852
#ifdef CONFIG_BUG
extern void netdev_rx_csum_fault(struct net_device *dev);
#else
static inline void netdev_rx_csum_fault(struct net_device *dev)
{
}
#endif
L
Linus Torvalds 已提交
1853 1854 1855 1856
/* rx skb timestamps */
extern void		net_enable_timestamp(void);
extern void		net_disable_timestamp(void);

1857 1858 1859 1860 1861 1862
#ifdef CONFIG_PROC_FS
extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
extern void dev_seq_stop(struct seq_file *seq, void *v);
#endif

1863 1864 1865
extern int netdev_class_create_file(struct class_attribute *class_attr);
extern void netdev_class_remove_file(struct class_attribute *class_attr);

1866
extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1867

1868 1869
extern void linkwatch_run_queue(void);

1870 1871 1872
unsigned long netdev_increment_features(unsigned long all, unsigned long one,
					unsigned long mask);
unsigned long netdev_fix_features(unsigned long features, const char *name);
1873

1874
static inline int net_gso_ok(int features, int gso_type)
1875
{
1876
	int feature = gso_type << NETIF_F_GSO_SHIFT;
1877
	return (features & feature) == feature;
1878 1879
}

1880 1881
static inline int skb_gso_ok(struct sk_buff *skb, int features)
{
1882
	return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1883 1884
}

1885 1886
static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
{
1887 1888
	return skb_is_gso(skb) &&
	       (!skb_gso_ok(skb, dev->features) ||
H
Herbert Xu 已提交
1889 1890
	        (skb_shinfo(skb)->frag_list &&
	         !(dev->features & NETIF_F_FRAGLIST)) ||
1891
		unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1892 1893
}

1894 1895 1896 1897 1898 1899
static inline void netif_set_gso_max_size(struct net_device *dev,
					  unsigned int size)
{
	dev->gso_max_size = size;
}

1900
/* On bonding slaves other than the currently active slave, suppress
1901 1902
 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
 * ARP on active-backup slaves with arp_validate enabled.
1903 1904 1905 1906 1907 1908
 */
static inline int skb_bond_should_drop(struct sk_buff *skb)
{
	struct net_device *dev = skb->dev;
	struct net_device *master = dev->master;

1909 1910 1911 1912 1913 1914
	if (master) {
		if (master->priv_flags & IFF_MASTER_ARPMON)
			dev->last_rx = jiffies;

		if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
			if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1915
			    skb->protocol == __cpu_to_be16(ETH_P_ARP))
1916 1917
				return 0;

1918 1919 1920 1921 1922 1923
			if (master->priv_flags & IFF_MASTER_ALB) {
				if (skb->pkt_type != PACKET_BROADCAST &&
				    skb->pkt_type != PACKET_MULTICAST)
					return 0;
			}
			if (master->priv_flags & IFF_MASTER_8023AD &&
1924
			    skb->protocol == __cpu_to_be16(ETH_P_SLOW))
1925 1926 1927 1928
				return 0;

			return 1;
		}
1929 1930 1931 1932
	}
	return 0;
}

1933
extern struct pernet_operations __net_initdata loopback_net_ops;
1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955

static inline int dev_ethtool_get_settings(struct net_device *dev,
					   struct ethtool_cmd *cmd)
{
	if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
		return -EOPNOTSUPP;
	return dev->ethtool_ops->get_settings(dev, cmd);
}

static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
{
	if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
		return 0;
	return dev->ethtool_ops->get_rx_csum(dev);
}

static inline u32 dev_ethtool_get_flags(struct net_device *dev)
{
	if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
		return 0;
	return dev->ethtool_ops->get_flags(dev);
}
L
Linus Torvalds 已提交
1956 1957 1958
#endif /* __KERNEL__ */

#endif	/* _LINUX_DEV_H */