netdevice.h 70.4 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
 *		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>
31
#include <linux/if_link.h>
L
Linus Torvalds 已提交
32 33

#ifdef __KERNEL__
M
Mark Gross 已提交
34
#include <linux/pm_qos_params.h>
A
Al Viro 已提交
35
#include <linux/timer.h>
36
#include <linux/delay.h>
37
#include <linux/mm.h>
L
Linus Torvalds 已提交
38 39 40 41 42 43
#include <asm/atomic.h>
#include <asm/cache.h>
#include <asm/byteorder.h>

#include <linux/device.h>
#include <linux/percpu.h>
44
#include <linux/rculist.h>
45
#include <linux/dmaengine.h>
46
#include <linux/workqueue.h>
L
Linus Torvalds 已提交
47

48
#include <linux/ethtool.h>
49
#include <net/net_namespace.h>
50
#include <net/dsa.h>
J
Jeff Kirsher 已提交
51
#ifdef CONFIG_DCB
52 53
#include <net/dcbnl.h>
#endif
54

L
Linus Torvalds 已提交
55
struct vlan_group;
56
struct netpoll_info;
57 58
/* 802.11 specific */
struct wireless_dev;
L
Linus Torvalds 已提交
59 60 61 62 63 64 65 66 67
					/* 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() */

68 69 70 71
/* Backlog congestion levels */
#define NET_RX_SUCCESS		0	/* keep 'em coming, baby */
#define NET_RX_DROP		1	/* packet dropped */

72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90
/*
 * Transmit return codes: transmit return codes originate from three different
 * namespaces:
 *
 * - qdisc return codes
 * - driver transmit return codes
 * - errno values
 *
 * Drivers are allowed to return any one of those in their hard_start_xmit()
 * function. Real network devices commonly used with qdiscs should only return
 * the driver transmit return codes though - when qdiscs are used, the actual
 * transmission happens asynchronously, so the value is not propagated to
 * higher layers. Virtual network devices transmit synchronously, in this case
 * the driver transmit return codes are consumed by dev_queue_xmit(), all
 * others are propagated to higher layers.
 */

/* qdisc ->enqueue() return codes. */
#define NET_XMIT_SUCCESS	0x00
91 92 93 94
#define NET_XMIT_DROP		0x01	/* skb dropped			*/
#define NET_XMIT_CN		0x02	/* congestion notification	*/
#define NET_XMIT_POLICED	0x03	/* skb is shot by police	*/
#define NET_XMIT_MASK		0x0f	/* qdisc flags in net/sch_generic.h */
L
Linus Torvalds 已提交
95

96 97 98
/* 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. */
99
#define net_xmit_eval(e)	((e) == NET_XMIT_CN ? 0 : (e))
L
Linus Torvalds 已提交
100 101
#define net_xmit_errno(e)	((e) != NET_XMIT_CN ? -ENOBUFS : 0)

102
/* Driver transmit return codes */
103
#define NETDEV_TX_MASK		0xf0
104

105
enum netdev_tx {
106
	__NETDEV_TX_MIN	 = INT_MIN,	/* make sure enum is signed */
107 108 109
	NETDEV_TX_OK	 = 0x00,	/* driver took care of packet */
	NETDEV_TX_BUSY	 = 0x10,	/* driver tx path was busy*/
	NETDEV_TX_LOCKED = 0x20,	/* driver tx lock was already taken */
110 111 112
};
typedef enum netdev_tx netdev_tx_t;

113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130
/*
 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
 */
static inline bool dev_xmit_complete(int rc)
{
	/*
	 * Positive cases with an skb consumed by a driver:
	 * - successful transmission (rc == NETDEV_TX_OK)
	 * - error while transmitting (rc < 0)
	 * - error while queueing to a different device (rc & NET_XMIT_MASK)
	 */
	if (likely(rc < NET_XMIT_MASK))
		return true;

	return false;
}

L
Linus Torvalds 已提交
131 132 133 134
#endif

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

135
#ifdef  __KERNEL__
L
Linus Torvalds 已提交
136 137 138 139
/*
 *	Compute the worst case header length according to the protocols
 *	used.
 */
G
Graf Yang 已提交
140

141
#if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
142 143 144 145 146
# if defined(CONFIG_MAC80211_MESH)
#  define LL_MAX_HEADER 128
# else
#  define LL_MAX_HEADER 96
# endif
147
#elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
148
# define LL_MAX_HEADER 48
L
Linus Torvalds 已提交
149
#else
150
# define LL_MAX_HEADER 32
L
Linus Torvalds 已提交
151 152
#endif

D
David S. Miller 已提交
153 154 155 156
#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
157 158 159 160 161
#define MAX_HEADER LL_MAX_HEADER
#else
#define MAX_HEADER (LL_MAX_HEADER + 48)
#endif

162 163
#endif  /*  __KERNEL__  */

L
Linus Torvalds 已提交
164 165 166 167
/*
 *	Network device statistics. Akin to the 2.0 ether stats but
 *	with byte counters.
 */
G
Graf Yang 已提交
168

E
Eric Dumazet 已提交
169
struct net_device_stats {
L
Linus Torvalds 已提交
170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221
	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;

222 223 224 225
struct netdev_hw_addr {
	struct list_head	list;
	unsigned char		addr[MAX_ADDR_LEN];
	unsigned char		type;
J
Jiri Pirko 已提交
226 227 228 229
#define NETDEV_HW_ADDR_T_LAN		1
#define NETDEV_HW_ADDR_T_SAN		2
#define NETDEV_HW_ADDR_T_SLAVE		3
#define NETDEV_HW_ADDR_T_UNICAST	4
230
#define NETDEV_HW_ADDR_T_MULTICAST	5
J
Jiri Pirko 已提交
231 232
	int			refcount;
	bool			synced;
233
	bool			global_use;
234 235 236
	struct rcu_head		rcu_head;
};

237 238 239 240 241
struct netdev_hw_addr_list {
	struct list_head	list;
	int			count;
};

242 243 244 245
#define netdev_hw_addr_list_count(l) ((l)->count)
#define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
#define netdev_hw_addr_list_for_each(ha, l) \
	list_for_each_entry(ha, &(l)->list, list)
246

247 248 249 250
#define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
#define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
#define netdev_for_each_uc_addr(ha, dev) \
	netdev_hw_addr_list_for_each(ha, &(dev)->uc)
251

252 253
#define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
#define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
254
#define netdev_for_each_mc_addr(ha, dev) \
255
	netdev_hw_addr_list_for_each(ha, &(dev)->mc)
256

E
Eric Dumazet 已提交
257
struct hh_cache {
L
Linus Torvalds 已提交
258 259
	struct hh_cache *hh_next;	/* Next entry			     */
	atomic_t	hh_refcnt;	/* number of users                   */
260 261 262 263 264 265 266 267
/*
 * 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
268 269 270
                                         *  NOTE:  For VLANs, this will be the
                                         *  encapuslated type. --BLG
                                         */
271
	u16		hh_len;		/* length of header */
L
Linus Torvalds 已提交
272
	int		(*hh_output)(struct sk_buff *skb);
273
	seqlock_t	hh_lock;
L
Linus Torvalds 已提交
274 275 276 277

	/* cached hardware header; allow for machine alignment needs.        */
#define HH_DATA_MOD	16
#define HH_DATA_OFF(__len) \
J
Jiri Benc 已提交
278
	(HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
L
Linus Torvalds 已提交
279 280 281 282 283 284 285 286 287 288 289 290
#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.
291 292 293
 *
 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
 * may need.
L
Linus Torvalds 已提交
294 295
 */
#define LL_RESERVED_SPACE(dev) \
296
	((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
L
Linus Torvalds 已提交
297
#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
298 299 300
	((((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
301

302 303 304 305 306 307 308 309 310 311 312 313 314
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
315 316 317 318 319
/* These flag bits are private to the generic network queueing
 * layer, they may not be explicitly referenced by any other
 * code.
 */

E
Eric Dumazet 已提交
320
enum netdev_state_t {
L
Linus Torvalds 已提交
321 322 323
	__LINK_STATE_START,
	__LINK_STATE_PRESENT,
	__LINK_STATE_NOCARRIER,
S
Stefan Rompf 已提交
324 325
	__LINK_STATE_LINKWATCH_PENDING,
	__LINK_STATE_DORMANT,
L
Linus Torvalds 已提交
326 327 328 329 330
};


/*
 * This structure holds at boot time configured netdevice settings. They
G
Graf Yang 已提交
331
 * are then used in the device probing.
L
Linus Torvalds 已提交
332 333 334 335 336 337 338
 */
struct netdev_boot_setup {
	char name[IFNAMSIZ];
	struct ifmap map;
};
#define NETDEV_BOOT_SETUP_MAX 8

339
extern int __init netdev_boot_setup(char *str);
L
Linus Torvalds 已提交
340

341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359
/*
 * 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
360 361 362

	unsigned int		gro_count;

H
Herbert Xu 已提交
363
	struct net_device	*dev;
364 365
	struct list_head	dev_list;
	struct sk_buff		*gro_list;
H
Herbert Xu 已提交
366
	struct sk_buff		*skb;
367 368
};

E
Eric Dumazet 已提交
369
enum {
370
	NAPI_STATE_SCHED,	/* Poll is scheduled */
D
David S. Miller 已提交
371
	NAPI_STATE_DISABLE,	/* Disable pending */
372
	NAPI_STATE_NPSVC,	/* Netpoll - don't dequeue from poll_list */
373 374
};

375
enum gro_result {
376 377 378 379 380 381
	GRO_MERGED,
	GRO_MERGED_FREE,
	GRO_HELD,
	GRO_NORMAL,
	GRO_DROP,
};
382
typedef enum gro_result gro_result_t;
383

384
extern void __napi_schedule(struct napi_struct *n);
385

D
David S. Miller 已提交
386 387 388 389 390
static inline int napi_disable_pending(struct napi_struct *n)
{
	return test_bit(NAPI_STATE_DISABLE, &n->state);
}

391 392 393 394 395 396
/**
 *	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
397 398
 * insure only one NAPI poll instance runs.  We also make
 * sure there is no pending NAPI disable.
399 400 401
 */
static inline int napi_schedule_prep(struct napi_struct *n)
{
D
David S. Miller 已提交
402 403
	return !napi_disable_pending(n) &&
		!test_and_set_bit(NAPI_STATE_SCHED, &n->state);
404 405 406 407 408 409 410 411 412 413 414 415 416 417 418
}

/**
 *	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);
}

419 420 421 422 423 424 425 426 427 428
/* 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;
}

429 430 431 432 433 434
/**
 *	napi_complete - NAPI processing complete
 *	@n: napi context
 *
 * Mark NAPI processing as complete.
 */
435 436
extern void __napi_complete(struct napi_struct *n);
extern void napi_complete(struct napi_struct *n);
437 438 439 440 441 442 443 444 445 446

/**
 *	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
447
	set_bit(NAPI_STATE_DISABLE, &n->state);
448
	while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
449
		msleep(1);
D
David S. Miller 已提交
450
	clear_bit(NAPI_STATE_DISABLE, &n->state);
451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466
}

/**
 *	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);
}

467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484
#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

E
Eric Dumazet 已提交
485
enum netdev_queue_state_t {
486
	__QUEUE_STATE_XOFF,
487
	__QUEUE_STATE_FROZEN,
488 489
};

490
struct netdev_queue {
491 492 493
/*
 * read mostly part
 */
494
	struct net_device	*dev;
495
	struct Qdisc		*qdisc;
496
	unsigned long		state;
497
	struct Qdisc		*qdisc_sleeping;
498 499 500 501 502
/*
 * write mostly part
 */
	spinlock_t		_xmit_lock ____cacheline_aligned_in_smp;
	int			xmit_lock_owner;
503 504 505 506
	/*
	 * please use this field instead of dev->trans_start
	 */
	unsigned long		trans_start;
507 508 509
	unsigned long		tx_bytes;
	unsigned long		tx_packets;
	unsigned long		tx_dropped;
510
} ____cacheline_aligned_in_smp;
511

E
Eric Dumazet 已提交
512
#ifdef CONFIG_RPS
T
Tom Herbert 已提交
513 514 515 516 517 518 519 520 521 522 523
/*
 * This structure holds an RPS map which can be of variable length.  The
 * map is an array of CPUs.
 */
struct rps_map {
	unsigned int len;
	struct rcu_head rcu;
	u16 cpus[0];
};
#define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))

T
Tom Herbert 已提交
524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581
/*
 * The rps_dev_flow structure contains the mapping of a flow to a CPU and the
 * tail pointer for that CPU's input queue at the time of last enqueue.
 */
struct rps_dev_flow {
	u16 cpu;
	u16 fill;
	unsigned int last_qtail;
};

/*
 * The rps_dev_flow_table structure contains a table of flow mappings.
 */
struct rps_dev_flow_table {
	unsigned int mask;
	struct rcu_head rcu;
	struct work_struct free_work;
	struct rps_dev_flow flows[0];
};
#define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
    (_num * sizeof(struct rps_dev_flow)))

/*
 * The rps_sock_flow_table contains mappings of flows to the last CPU
 * on which they were processed by the application (set in recvmsg).
 */
struct rps_sock_flow_table {
	unsigned int mask;
	u16 ents[0];
};
#define	RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
    (_num * sizeof(u16)))

#define RPS_NO_CPU 0xffff

static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
					u32 hash)
{
	if (table && hash) {
		unsigned int cpu, index = hash & table->mask;

		/* We only give a hint, preemption can change cpu under us */
		cpu = raw_smp_processor_id();

		if (table->ents[index] != cpu)
			table->ents[index] = cpu;
	}
}

static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
				       u32 hash)
{
	if (table && hash)
		table->ents[hash & table->mask] = RPS_NO_CPU;
}

extern struct rps_sock_flow_table *rps_sock_flow_table;

T
Tom Herbert 已提交
582 583 584
/* This structure contains an instance of an RX queue. */
struct netdev_rx_queue {
	struct rps_map *rps_map;
T
Tom Herbert 已提交
585
	struct rps_dev_flow_table *rps_flow_table;
T
Tom Herbert 已提交
586 587 588 589
	struct kobject kobj;
	struct netdev_rx_queue *first;
	atomic_t count;
} ____cacheline_aligned_in_smp;
T
Tom Herbert 已提交
590
#endif /* CONFIG_RPS */
591 592 593

/*
 * This structure defines the management hooks for network devices.
594 595
 * The following hooks can be defined; unless noted otherwise, they are
 * optional and can be filled with a null pointer.
596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614
 *
 * 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.
 *
615 616
 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
 *                               struct net_device *dev);
617
 *	Called when a packet needs to be transmitted.
618 619
 *	Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
 *        (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
620 621 622 623 624 625
 *	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.
 *
626 627 628 629 630 631 632 633 634 635 636 637
 * 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
638
 *	needs to be changed. If this interface is not defined, the
639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658
 *	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.
 *
659
 * void (*ndo_tx_timeout)(struct net_device *dev);
660 661 662
 *	Callback uses when the transmitter has not made any progress
 *	for dev->watchdog ticks.
 *
663
 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682
 *	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);
683 684 685 686 687 688 689
 *
 *	SR-IOV management functions.
 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
 * int (*ndo_get_vf_config)(struct net_device *dev,
 *			    int vf, struct ifla_vf_info *ivf);
690 691 692
 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
 *			  struct nlattr *port[]);
 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
693
 */
694
#define HAVE_NET_DEVICE_OPS
695 696 697 698 699
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);
700
	netdev_tx_t		(*ndo_start_xmit) (struct sk_buff *skb,
701 702 703
						   struct net_device *dev);
	u16			(*ndo_select_queue)(struct net_device *dev,
						    struct sk_buff *skb);
704 705 706 707 708 709 710 711 712 713 714
	void			(*ndo_change_rx_flags)(struct net_device *dev,
						       int flags);
	void			(*ndo_set_rx_mode)(struct net_device *dev);
	void			(*ndo_set_multicast_list)(struct net_device *dev);
	int			(*ndo_set_mac_address)(struct net_device *dev,
						       void *addr);
	int			(*ndo_validate_addr)(struct net_device *dev);
	int			(*ndo_do_ioctl)(struct net_device *dev,
					        struct ifreq *ifr, int cmd);
	int			(*ndo_set_config)(struct net_device *dev,
					          struct ifmap *map);
715 716 717 718
	int			(*ndo_change_mtu)(struct net_device *dev,
						  int new_mtu);
	int			(*ndo_neigh_setup)(struct net_device *dev,
						   struct neigh_parms *);
719 720 721 722 723 724 725 726 727 728 729 730
	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
	void                    (*ndo_poll_controller)(struct net_device *dev);
731
	void			(*ndo_netpoll_cleanup)(struct net_device *dev);
732
#endif
733 734 735 736 737 738 739 740 741
	int			(*ndo_set_vf_mac)(struct net_device *dev,
						  int queue, u8 *mac);
	int			(*ndo_set_vf_vlan)(struct net_device *dev,
						   int queue, u16 vlan, u8 qos);
	int			(*ndo_set_vf_tx_rate)(struct net_device *dev,
						      int vf, int rate);
	int			(*ndo_get_vf_config)(struct net_device *dev,
						     int vf,
						     struct ifla_vf_info *ivf);
742 743 744 745 746
	int			(*ndo_set_vf_port)(struct net_device *dev,
						   int vf,
						   struct nlattr *port[]);
	int			(*ndo_get_vf_port)(struct net_device *dev,
						   int vf, struct sk_buff *skb);
747
#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
748 749
	int			(*ndo_fcoe_enable)(struct net_device *dev);
	int			(*ndo_fcoe_disable)(struct net_device *dev);
750 751 752 753 754 755
	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);
756 757 758 759
#define NETDEV_FCOE_WWNN 0
#define NETDEV_FCOE_WWPN 1
	int			(*ndo_fcoe_get_wwn)(struct net_device *dev,
						    u64 *wwn, int type);
760
#endif
761 762
};

L
Linus Torvalds 已提交
763 764 765 766 767 768 769 770 771 772
/*
 *	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.
 */

E
Eric Dumazet 已提交
773
struct net_device {
L
Linus Torvalds 已提交
774 775 776 777 778 779 780

	/*
	 * 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];
M
Mark Gross 已提交
781 782 783

	struct pm_qos_request_list *pm_qos_req;

784 785
	/* device name hash chain */
	struct hlist_node	name_hlist;
786 787
	/* snmp alias */
	char 			*ifalias;
L
Linus Torvalds 已提交
788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807

	/*
	 *	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;

808
	struct list_head	dev_list;
809
	struct list_head	napi_list;
810
	struct list_head	unreg_list;
L
Linus Torvalds 已提交
811

812 813 814
	/* Net device features */
	unsigned long		features;
#define NETIF_F_SG		1	/* Scatter/gather IO. */
815
#define NETIF_F_IP_CSUM		2	/* Can checksum TCP/UDP over IPv4. */
816 817
#define NETIF_F_NO_CSUM		4	/* Does not require checksum. F.e. loopack. */
#define NETIF_F_HW_CSUM		8	/* Can checksum all the packets. */
818
#define NETIF_F_IPV6_CSUM	16	/* Can checksum TCP/UDP over IPV6 */
819 820 821 822 823 824
#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
825
#define NETIF_F_GSO		2048	/* Enable software GSO. */
826 827
#define NETIF_F_LLTX		4096	/* LockLess TX - deprecated. Please */
					/* do not use LLTX in new drivers */
828
#define NETIF_F_NETNS_LOCAL	8192	/* Does not change network namespaces */
829
#define NETIF_F_GRO		16384	/* Generic receive offload */
830
#define NETIF_F_LRO		32768	/* large receive offload */
831

832
/* the GSO_MASK reserves bits 16 through 23 */
833
#define NETIF_F_FCOE_CRC	(1 << 24) /* FCoE CRC32 */
834
#define NETIF_F_SCTP_CSUM	(1 << 25) /* SCTP checksum offload */
835
#define NETIF_F_FCOE_MTU	(1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
836
#define NETIF_F_NTUPLE		(1 << 27) /* N-tuple filters supported */
S
stephen hemminger 已提交
837
#define NETIF_F_RXHASH		(1 << 28) /* Receive hashing offload */
838

839
	/* Segmentation offload features */
840
#define NETIF_F_GSO_SHIFT	16
841
#define NETIF_F_GSO_MASK	0x00ff0000
842
#define NETIF_F_TSO		(SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
H
Herbert Xu 已提交
843
#define NETIF_F_UFO		(SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
844
#define NETIF_F_GSO_ROBUST	(SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
H
Herbert Xu 已提交
845 846
#define NETIF_F_TSO_ECN		(SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
#define NETIF_F_TSO6		(SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
847
#define NETIF_F_FSO		(SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
848

849 850 851
	/* List of features with software fallbacks. */
#define NETIF_F_GSO_SOFTWARE	(NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)

852

853
#define NETIF_F_GEN_CSUM	(NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
854 855 856
#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)
857

858 859 860 861 862
	/*
	 * 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 | \
863
				 NETIF_F_SG | NETIF_F_HIGHDMA |		\
864 865
				 NETIF_F_FRAGLIST)

L
Linus Torvalds 已提交
866 867 868 869
	/* Interface index. Unique device identifier	*/
	int			ifindex;
	int			iflink;

R
Rusty Russell 已提交
870
	struct net_device_stats	stats;
L
Linus Torvalds 已提交
871

872
#ifdef CONFIG_WIRELESS_EXT
L
Linus Torvalds 已提交
873 874 875 876 877
	/* 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;
878
#endif
879 880
	/* Management operations */
	const struct net_device_ops *netdev_ops;
881
	const struct ethtool_ops *ethtool_ops;
L
Linus Torvalds 已提交
882

883 884 885
	/* Hardware header description */
	const struct header_ops *header_ops;

S
Stefan Rompf 已提交
886
	unsigned int		flags;	/* interface flags (a la BSD)	*/
L
Linus Torvalds 已提交
887 888 889 890
	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
891 892 893
	unsigned char		operstate; /* RFC2863 operstate */
	unsigned char		link_mode; /* mapping policy to operstate */

894
	unsigned int		mtu;	/* interface MTU value		*/
L
Linus Torvalds 已提交
895 896 897
	unsigned short		type;	/* interface hardware type	*/
	unsigned short		hard_header_len;	/* hardware hdr length	*/

898 899 900 901 902 903 904
	/* 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
905 906 907 908 909
	struct net_device	*master; /* Pointer to master device of a group,
					  * which this device is member of.
					  */

	/* Interface address info. */
910
	unsigned char		perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
L
Linus Torvalds 已提交
911 912 913
	unsigned char		addr_len;	/* hardware address length	*/
	unsigned short          dev_id;		/* for shared network cards */

J
Jiri Pirko 已提交
914
	spinlock_t		addr_list_lock;
915 916 917
	struct netdev_hw_addr_list	uc;	/* Unicast mac addresses */
	struct netdev_hw_addr_list	mc;	/* Multicast mac addresses */
	int			uc_promisc;
918 919
	unsigned int		promiscuity;
	unsigned int		allmulti;
L
Linus Torvalds 已提交
920 921 922 923


	/* Protocol specific pointers */
	
924 925 926
#ifdef CONFIG_NET_DSA
	void			*dsa_ptr;	/* dsa specific data */
#endif
L
Linus Torvalds 已提交
927
	void 			*atalk_ptr;	/* AppleTalk link 	*/
G
Graf Yang 已提交
928
	void			*ip_ptr;	/* IPv4 specific data	*/
L
Linus Torvalds 已提交
929 930 931 932
	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 */
933 934
	struct wireless_dev	*ieee80211_ptr;	/* IEEE 802.11 specific data,
						   assign before registering */
L
Linus Torvalds 已提交
935

936 937 938 939 940
/*
 * 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() */
941 942 943 944
	unsigned char		*dev_addr;	/* hw address, (before bcast
						   because most packets are
						   unicast) */

945 946
	struct netdev_hw_addr_list	dev_addrs; /* list of device
						      hw addresses */
947 948

	unsigned char		broadcast[MAX_ADDR_LEN];	/* hw bcast add	*/
L
Linus Torvalds 已提交
949

E
Eric Dumazet 已提交
950
#ifdef CONFIG_RPS
T
Tom Herbert 已提交
951 952 953 954 955 956
	struct kset		*queues_kset;

	struct netdev_rx_queue	*_rx;

	/* Number of RX queues allocated at alloc_netdev_mq() time  */
	unsigned int		num_rx_queues;
E
Eric Dumazet 已提交
957
#endif
T
Tom Herbert 已提交
958

959
	struct netdev_queue	rx_queue;
960 961

	struct netdev_queue	*_tx ____cacheline_aligned_in_smp;
962 963

	/* Number of TX queues allocated at alloc_netdev_mq() time  */
964
	unsigned int		num_tx_queues;
965 966 967 968

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

969 970 971
	/* root qdisc from userspace point of view */
	struct Qdisc		*qdisc;

L
Linus Torvalds 已提交
972
	unsigned long		tx_queue_len;	/* Max frames per queue allowed */
973
	spinlock_t		tx_global_lock;
974 975 976 977
/*
 * One part is mostly used on xmit path (device)
 */
	/* These may be needed for future network-power-down code. */
978 979 980 981 982

	/*
	 * trans_start here is expensive for high speed devices on SMP,
	 * please use netdev_queue->trans_start instead.
	 */
983 984 985 986 987
	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
988
	/* Number of references to this device */
989 990
	atomic_t		refcnt ____cacheline_aligned_in_smp;

L
Linus Torvalds 已提交
991 992 993 994 995
	/* delayed register/unregister */
	struct list_head	todo_list;
	/* device index hash chain */
	struct hlist_node	index_hlist;

996
	struct list_head	link_watch_list;
997

L
Linus Torvalds 已提交
998 999
	/* register/unregister state machine */
	enum { NETREG_UNINITIALIZED=0,
1000
	       NETREG_REGISTERED,	/* completed register_netdevice */
L
Linus Torvalds 已提交
1001 1002 1003
	       NETREG_UNREGISTERING,	/* called unregister_netdevice */
	       NETREG_UNREGISTERED,	/* completed unregister todo */
	       NETREG_RELEASED,		/* called free_netdev */
1004
	       NETREG_DUMMY,		/* dummy device for NAPI poll */
1005 1006 1007 1008 1009 1010
	} reg_state:16;

	enum {
		RTNL_LINK_INITIALIZED,
		RTNL_LINK_INITIALIZING,
	} rtnl_link_state:16;
L
Linus Torvalds 已提交
1011

1012 1013
	/* Called from unregister, can be used to call free_netdev */
	void (*destructor)(struct net_device *dev);
L
Linus Torvalds 已提交
1014 1015

#ifdef CONFIG_NETPOLL
1016
	struct netpoll_info	*npinfo;
L
Linus Torvalds 已提交
1017
#endif
1018

1019
#ifdef CONFIG_NET_NS
1020 1021
	/* Network namespace this network device is inside */
	struct net		*nd_net;
1022
#endif
1023

D
David S. Miller 已提交
1024 1025 1026
	/* mid-layer private */
	void			*ml_priv;

L
Linus Torvalds 已提交
1027 1028
	/* bridge stuff */
	struct net_bridge_port	*br_port;
P
Patrick McHardy 已提交
1029 1030
	/* macvlan */
	struct macvlan_port	*macvlan_port;
1031 1032
	/* GARP */
	struct garp_port	*garp_port;
L
Linus Torvalds 已提交
1033 1034

	/* class/net/name entry */
1035
	struct device		dev;
1036 1037
	/* space for optional device, statistics, and wireless sysfs groups */
	const struct attribute_group *sysfs_groups[4];
P
Patrick McHardy 已提交
1038 1039 1040

	/* rtnetlink link ops */
	const struct rtnl_link_ops *rtnl_link_ops;
1041

1042 1043 1044
	/* VLAN feature mask */
	unsigned long vlan_features;

1045 1046 1047
	/* for setting kernel sock attribute on TCP connection setup */
#define GSO_MAX_SIZE		65536
	unsigned int		gso_max_size;
1048

J
Jeff Kirsher 已提交
1049
#ifdef CONFIG_DCB
1050
	/* Data Center Bridging netlink ops */
1051
	const struct dcbnl_rtnl_ops *dcbnl_ops;
1052 1053
#endif

1054 1055 1056 1057
#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
	/* max exchange id for FCoE LRO by ddp */
	unsigned int		fcoe_ddp_xid;
#endif
1058 1059
	/* n-tuple filter list attached to this device */
	struct ethtool_rx_ntuple_list ethtool_ntuple_list;
L
Linus Torvalds 已提交
1060
};
1061
#define to_net_dev(d) container_of(d, struct net_device, dev)
L
Linus Torvalds 已提交
1062 1063 1064

#define	NETDEV_ALIGN		32

1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083
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);
}

1084 1085 1086 1087 1088 1089
/*
 * Net namespace inlines
 */
static inline
struct net *dev_net(const struct net_device *dev)
{
E
Eric Dumazet 已提交
1090
	return read_pnet(&dev->nd_net);
1091 1092 1093
}

static inline
1094
void dev_net_set(struct net_device *dev, struct net *net)
1095 1096
{
#ifdef CONFIG_NET_NS
1097 1098
	release_net(dev->nd_net);
	dev->nd_net = hold_net(net);
1099 1100 1101
#endif
}

1102 1103 1104 1105 1106 1107 1108 1109 1110 1111
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;
}

1112 1113 1114 1115 1116 1117 1118 1119 1120
#ifndef CONFIG_NET_NS
static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
{
	skb->dev = dev;
}
#else /* CONFIG_NET_NS */
void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
#endif

1121 1122 1123 1124 1125 1126 1127 1128 1129 1130
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;
}

1131 1132 1133 1134 1135 1136
/**
 *	netdev_priv - access network device private data
 *	@dev: network device
 *
 * Get network device private data
 */
1137
static inline void *netdev_priv(const struct net_device *dev)
L
Linus Torvalds 已提交
1138
{
1139
	return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
L
Linus Torvalds 已提交
1140 1141 1142 1143 1144
}

/* Set the sysfs physical device reference for the network logical device
 * if set prior to registration will cause a symlink during initialization.
 */
1145
#define SET_NETDEV_DEV(net, pdev)	((net)->dev.parent = (pdev))
L
Linus Torvalds 已提交
1146

1147 1148 1149 1150 1151 1152
/* Set the sysfs device type for the network logical device to allow
 * fin grained indentification of different network device types. For
 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
 */
#define SET_NETDEV_DEVTYPE(net, devtype)	((net)->dev.type = (devtype))

1153 1154 1155 1156 1157 1158 1159 1160 1161 1162
/**
 *	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.
 */
1163 1164
void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
		    int (*poll)(struct napi_struct *, int), int weight);
1165

1166 1167 1168 1169 1170 1171
/**
 *  netif_napi_del - remove a napi context
 *  @napi: napi context
 *
 *  netif_napi_del() removes a napi context from the network device napi list
 */
1172 1173 1174
void netif_napi_del(struct napi_struct *napi);

struct napi_gro_cb {
1175 1176 1177
	/* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
	void *frag0;

1178 1179 1180
	/* Length of frag0. */
	unsigned int frag0_len;

1181 1182 1183
	/* This indicates where we are processing relative to skb->data. */
	int data_offset;

1184 1185 1186 1187 1188 1189 1190 1191
	/* 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
1192 1193 1194

	/* Free the skb? */
	int free;
1195 1196 1197
};

#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1198

L
Linus Torvalds 已提交
1199
struct packet_type {
D
David S. Miller 已提交
1200 1201 1202 1203 1204 1205
	__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 *);
1206 1207
	struct sk_buff		*(*gso_segment)(struct sk_buff *skb,
						int features);
1208
	int			(*gso_send_check)(struct sk_buff *skb);
1209 1210 1211
	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
1212 1213 1214 1215 1216 1217 1218 1219 1220
	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 */

1221

1222 1223
#define for_each_netdev(net, d)		\
		list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1224 1225
#define for_each_netdev_reverse(net, d)	\
		list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1226 1227
#define for_each_netdev_rcu(net, d)		\
		list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1228 1229 1230 1231
#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)
1232 1233
#define for_each_netdev_continue_rcu(net, d)		\
	list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1234
#define net_device_entry(lh)	list_entry(lh, struct net_device, dev_list)
1235

1236 1237 1238 1239 1240
static inline struct net_device *next_net_device(struct net_device *dev)
{
	struct list_head *lh;
	struct net *net;

1241
	net = dev_net(dev);
1242 1243 1244 1245
	lh = dev->dev_list.next;
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

1246 1247 1248 1249 1250 1251 1252 1253 1254 1255
static inline struct net_device *next_net_device_rcu(struct net_device *dev)
{
	struct list_head *lh;
	struct net *net;

	net = dev_net(dev);
	lh = rcu_dereference(dev->dev_list.next);
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

1256 1257 1258 1259 1260
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);
}
1261

L
Linus Torvalds 已提交
1262 1263
extern int 			netdev_boot_setup_check(struct net_device *dev);
extern unsigned long		netdev_boot_base(const char *prefix, int unit);
1264 1265 1266
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
1267 1268 1269 1270
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);

1271
extern struct net_device	*dev_get_by_flags(struct net *net, unsigned short flags,
L
Linus Torvalds 已提交
1272
						  unsigned short mask);
1273
extern struct net_device	*dev_get_by_name(struct net *net, const char *name);
1274
extern struct net_device	*dev_get_by_name_rcu(struct net *net, const char *name);
1275
extern struct net_device	*__dev_get_by_name(struct net *net, const char *name);
L
Linus Torvalds 已提交
1276 1277 1278
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);
1279
extern void		dev_disable_lro(struct net_device *dev);
L
Linus Torvalds 已提交
1280 1281
extern int		dev_queue_xmit(struct sk_buff *skb);
extern int		register_netdevice(struct net_device *dev);
1282 1283
extern void		unregister_netdevice_queue(struct net_device *dev,
						   struct list_head *head);
1284
extern void		unregister_netdevice_many(struct list_head *head);
1285 1286 1287 1288 1289
static inline void unregister_netdevice(struct net_device *dev)
{
	unregister_netdevice_queue(dev, NULL);
}

L
Linus Torvalds 已提交
1290 1291 1292 1293
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);
1294
extern int		init_dummy_netdev(struct net_device *dev);
1295
extern void		netdev_resync_ops(struct net_device *dev);
1296

1297
extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1298 1299
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);
1300
extern struct net_device	*dev_get_by_index_rcu(struct net *net, int ifindex);
L
Linus Torvalds 已提交
1301 1302 1303 1304
extern int		dev_restart(struct net_device *dev);
#ifdef CONFIG_NETPOLL_TRAP
extern int		netpoll_trap(void);
#endif
1305 1306
extern int	       skb_gro_receive(struct sk_buff **head,
				       struct sk_buff *skb);
1307
extern void	       skb_gro_reset_offset(struct sk_buff *skb);
1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323

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;
}

1324 1325
static inline void *skb_gro_header_fast(struct sk_buff *skb,
					unsigned int offset)
1326
{
1327 1328
	return NAPI_GRO_CB(skb)->frag0 + offset;
}
1329

1330 1331 1332 1333
static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
{
	return NAPI_GRO_CB(skb)->frag0_len < hlen;
}
1334

1335 1336 1337 1338 1339 1340
static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
					unsigned int offset)
{
	NAPI_GRO_CB(skb)->frag0 = NULL;
	NAPI_GRO_CB(skb)->frag0_len = 0;
	return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1341
}
L
Linus Torvalds 已提交
1342

1343 1344
static inline void *skb_gro_mac_header(struct sk_buff *skb)
{
1345
	return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1346 1347
}

H
Herbert Xu 已提交
1348 1349
static inline void *skb_gro_network_header(struct sk_buff *skb)
{
1350 1351
	return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
	       skb_network_offset(skb);
H
Herbert Xu 已提交
1352 1353
}

1354 1355
static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
				  unsigned short type,
1356 1357
				  const void *daddr, const void *saddr,
				  unsigned len)
1358
{
1359
	if (!dev->header_ops || !dev->header_ops->create)
1360
		return 0;
1361 1362

	return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1363 1364
}

S
Stephen Hemminger 已提交
1365 1366 1367 1368 1369
static inline int dev_parse_header(const struct sk_buff *skb,
				   unsigned char *haddr)
{
	const struct net_device *dev = skb->dev;

1370
	if (!dev->header_ops || !dev->header_ops->parse)
S
Stephen Hemminger 已提交
1371
		return 0;
1372
	return dev->header_ops->parse(skb, haddr);
S
Stephen Hemminger 已提交
1373 1374
}

L
Linus Torvalds 已提交
1375 1376 1377 1378 1379 1380 1381 1382
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);
}

/*
E
Eric Dumazet 已提交
1383
 * Incoming packets are placed on per-cpu queues
L
Linus Torvalds 已提交
1384
 */
E
Eric Dumazet 已提交
1385
struct softnet_data {
1386
	struct Qdisc		*output_queue;
1387
	struct Qdisc		**output_queue_tailp;
L
Linus Torvalds 已提交
1388 1389
	struct list_head	poll_list;
	struct sk_buff		*completion_queue;
1390
	struct sk_buff_head	process_queue;
L
Linus Torvalds 已提交
1391

C
Changli Gao 已提交
1392
	/* stats */
1393 1394 1395 1396
	unsigned int		processed;
	unsigned int		time_squeeze;
	unsigned int		cpu_collision;
	unsigned int		received_rps;
C
Changli Gao 已提交
1397

1398
#ifdef CONFIG_RPS
E
Eric Dumazet 已提交
1399 1400 1401
	struct softnet_data	*rps_ipi_list;

	/* Elements below can be accessed between CPUs for RPS */
T
Tom Herbert 已提交
1402
	struct call_single_data	csd ____cacheline_aligned_in_smp;
E
Eric Dumazet 已提交
1403 1404
	struct softnet_data	*rps_ipi_next;
	unsigned int		cpu;
T
Tom Herbert 已提交
1405
	unsigned int		input_queue_head;
1406
	unsigned int		input_queue_tail;
1407
#endif
C
Changli Gao 已提交
1408
	unsigned		dropped;
T
Tom Herbert 已提交
1409
	struct sk_buff_head	input_pkt_queue;
1410
	struct napi_struct	backlog;
L
Linus Torvalds 已提交
1411 1412
};

1413
static inline void input_queue_head_incr(struct softnet_data *sd)
T
Tom Herbert 已提交
1414 1415
{
#ifdef CONFIG_RPS
1416 1417 1418 1419 1420 1421 1422 1423 1424
	sd->input_queue_head++;
#endif
}

static inline void input_queue_tail_incr_save(struct softnet_data *sd,
					      unsigned int *qtail)
{
#ifdef CONFIG_RPS
	*qtail = ++sd->input_queue_tail;
T
Tom Herbert 已提交
1425 1426 1427
#endif
}

T
Tom Herbert 已提交
1428
DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
L
Linus Torvalds 已提交
1429 1430 1431

#define HAVE_NETIF_QUEUE

1432
extern void __netif_schedule(struct Qdisc *q);
L
Linus Torvalds 已提交
1433

1434
static inline void netif_schedule_queue(struct netdev_queue *txq)
L
Linus Torvalds 已提交
1435
{
1436
	if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1437
		__netif_schedule(txq->qdisc);
1438 1439
}

1440 1441 1442 1443 1444 1445 1446 1447
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));
}

1448 1449 1450 1451 1452
static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
{
	clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
}

1453 1454 1455 1456 1457 1458
/**
 *	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
1459 1460
static inline void netif_start_queue(struct net_device *dev)
{
1461
	netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1462 1463
}

1464 1465 1466 1467 1468 1469 1470 1471 1472 1473
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);
	}
}

1474
static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
L
Linus Torvalds 已提交
1475 1476
{
#ifdef CONFIG_NETPOLL_TRAP
1477
	if (netpoll_trap()) {
1478
		netif_tx_start_queue(dev_queue);
L
Linus Torvalds 已提交
1479
		return;
1480
	}
L
Linus Torvalds 已提交
1481
#endif
1482
	if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1483
		__netif_schedule(dev_queue->qdisc);
1484 1485
}

1486 1487 1488 1489 1490 1491 1492
/**
 *	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.
 */
1493 1494
static inline void netif_wake_queue(struct net_device *dev)
{
1495
	netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1496 1497
}

1498 1499 1500 1501 1502 1503 1504 1505 1506 1507
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);
	}
}

1508 1509 1510 1511 1512
static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
{
	set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
}

1513 1514 1515 1516 1517 1518 1519
/**
 *	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
1520 1521
static inline void netif_stop_queue(struct net_device *dev)
{
1522
	netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1523 1524
}

1525 1526 1527 1528 1529 1530 1531 1532 1533 1534
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);
	}
}

1535 1536 1537 1538 1539
static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
{
	return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
}

1540 1541 1542 1543 1544 1545
/**
 *	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
1546 1547
static inline int netif_queue_stopped(const struct net_device *dev)
{
1548
	return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1549 1550
}

1551 1552 1553 1554 1555
static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
{
	return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
}

1556 1557 1558 1559 1560 1561
/**
 *	netif_running - test if up
 *	@dev: network device
 *
 *	Test if the device has been brought up.
 */
L
Linus Torvalds 已提交
1562 1563 1564 1565 1566
static inline int netif_running(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_START, &dev->state);
}

1567 1568 1569 1570 1571 1572
/*
 * 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.
 */
1573 1574 1575 1576 1577 1578 1579 1580

/**
 *	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.
 */
1581 1582
static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
{
1583
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1584 1585

	netif_tx_start_queue(txq);
1586 1587
}

1588 1589 1590 1591 1592 1593 1594
/**
 *	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.
 */
1595 1596
static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
{
1597
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1598 1599 1600 1601
#ifdef CONFIG_NETPOLL_TRAP
	if (netpoll_trap())
		return;
#endif
1602
	netif_tx_stop_queue(txq);
1603 1604
}

1605 1606 1607 1608 1609 1610 1611
/**
 *	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.
 */
1612
static inline int __netif_subqueue_stopped(const struct net_device *dev,
1613 1614
					 u16 queue_index)
{
1615
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1616 1617

	return netif_tx_queue_stopped(txq);
1618 1619
}

1620 1621 1622 1623 1624
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));
}
1625 1626 1627 1628 1629 1630 1631 1632

/**
 *	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.
 */
1633 1634
static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
{
1635
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1636 1637 1638 1639
#ifdef CONFIG_NETPOLL_TRAP
	if (netpoll_trap())
		return;
#endif
1640
	if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1641
		__netif_schedule(txq->qdisc);
1642 1643
}

1644 1645 1646 1647 1648 1649
/**
 *	netif_is_multiqueue - test if device has multiple transmit queues
 *	@dev: network device
 *
 * Check if device has multiple transmit queues
 */
1650 1651
static inline int netif_is_multiqueue(const struct net_device *dev)
{
1652
	return (dev->num_tx_queues > 1);
1653
}
L
Linus Torvalds 已提交
1654 1655

/* Use this variant when it is known for sure that it
1656 1657
 * is executing from hardware interrupt context or with hardware interrupts
 * disabled.
L
Linus Torvalds 已提交
1658
 */
1659
extern void dev_kfree_skb_irq(struct sk_buff *skb);
L
Linus Torvalds 已提交
1660 1661

/* Use this variant in places where it could be invoked
1662 1663
 * from either hardware interrupt or other context, with hardware interrupts
 * either disabled or enabled.
L
Linus Torvalds 已提交
1664
 */
1665
extern void dev_kfree_skb_any(struct sk_buff *skb);
L
Linus Torvalds 已提交
1666 1667 1668 1669 1670 1671

#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);
1672
extern gro_result_t	dev_gro_receive(struct napi_struct *napi,
1673
					struct sk_buff *skb);
1674 1675
extern gro_result_t	napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
extern gro_result_t	napi_gro_receive(struct napi_struct *napi,
1676
					 struct sk_buff *skb);
1677 1678
extern void		napi_reuse_skb(struct napi_struct *napi,
				       struct sk_buff *skb);
1679
extern struct sk_buff *	napi_get_frags(struct napi_struct *napi);
1680
extern gro_result_t	napi_frags_finish(struct napi_struct *napi,
1681 1682
					  struct sk_buff *skb,
					  gro_result_t ret);
1683
extern struct sk_buff *	napi_frags_skb(struct napi_struct *napi);
1684
extern gro_result_t	napi_gro_frags(struct napi_struct *napi);
1685 1686 1687 1688 1689 1690 1691

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

1692
extern void		netif_nit_deliver(struct sk_buff *skb);
1693
extern int		dev_valid_name(const char *name);
1694 1695
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
1696
extern unsigned		dev_get_flags(const struct net_device *);
1697
extern int		__dev_change_flags(struct net_device *, unsigned int flags);
L
Linus Torvalds 已提交
1698
extern int		dev_change_flags(struct net_device *, unsigned);
1699
extern void		__dev_notify_flags(struct net_device *, unsigned int old_flags);
1700
extern int		dev_change_name(struct net_device *, const char *);
1701
extern int		dev_set_alias(struct net_device *, const char *, size_t);
1702 1703
extern int		dev_change_net_namespace(struct net_device *,
						 struct net *, const char *);
L
Linus Torvalds 已提交
1704 1705 1706
extern int		dev_set_mtu(struct net_device *, int);
extern int		dev_set_mac_address(struct net_device *,
					    struct sockaddr *);
1707
extern int		dev_hard_start_xmit(struct sk_buff *skb,
1708 1709
					    struct net_device *dev,
					    struct netdev_queue *txq);
1710 1711
extern int		dev_forward_skb(struct net_device *dev,
					struct sk_buff *skb);
L
Linus Torvalds 已提交
1712

1713
extern int		netdev_budget;
L
Linus Torvalds 已提交
1714 1715 1716 1717

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

1718 1719 1720 1721
/**
 *	dev_put - release reference to device
 *	@dev: network device
 *
1722
 * Release reference to device to allow it to be freed.
1723
 */
L
Linus Torvalds 已提交
1724 1725 1726 1727 1728
static inline void dev_put(struct net_device *dev)
{
	atomic_dec(&dev->refcnt);
}

1729 1730 1731 1732
/**
 *	dev_hold - get reference to device
 *	@dev: network device
 *
1733
 * Hold reference to device to keep it from being freed.
1734
 */
1735 1736 1737 1738
static inline void dev_hold(struct net_device *dev)
{
	atomic_inc(&dev->refcnt);
}
L
Linus Torvalds 已提交
1739 1740 1741 1742

/* 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
1743 1744 1745 1746
 *
 * 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
1747 1748 1749
 */

extern void linkwatch_fire_event(struct net_device *dev);
1750
extern void linkwatch_forget_dev(struct net_device *dev);
L
Linus Torvalds 已提交
1751

1752 1753 1754 1755 1756 1757
/**
 *	netif_carrier_ok - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
L
Linus Torvalds 已提交
1758 1759 1760 1761 1762
static inline int netif_carrier_ok(const struct net_device *dev)
{
	return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
}

1763 1764
extern unsigned long dev_trans_start(struct net_device *dev);

L
Linus Torvalds 已提交
1765 1766
extern void __netdev_watchdog_up(struct net_device *dev);

1767
extern void netif_carrier_on(struct net_device *dev);
L
Linus Torvalds 已提交
1768

1769
extern void netif_carrier_off(struct net_device *dev);
L
Linus Torvalds 已提交
1770

1771 1772
extern void netif_notify_peers(struct net_device *dev);

1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785
/**
 *	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
1786 1787 1788 1789 1790 1791
static inline void netif_dormant_on(struct net_device *dev)
{
	if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

1792 1793 1794 1795 1796 1797
/**
 *	netif_dormant_off - set device as not dormant.
 *	@dev: network device
 *
 * Device is not in dormant state.
 */
S
Stefan Rompf 已提交
1798 1799 1800 1801 1802 1803
static inline void netif_dormant_off(struct net_device *dev)
{
	if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

1804 1805 1806 1807 1808 1809
/**
 *	netif_dormant - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
S
Stefan Rompf 已提交
1810 1811 1812 1813 1814 1815
static inline int netif_dormant(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_DORMANT, &dev->state);
}


1816 1817 1818 1819 1820 1821
/**
 *	netif_oper_up - test if device is operational
 *	@dev: network device
 *
 * Check if carrier is operational
 */
E
Eric Dumazet 已提交
1822 1823
static inline int netif_oper_up(const struct net_device *dev)
{
S
Stefan Rompf 已提交
1824 1825 1826 1827
	return (dev->operstate == IF_OPER_UP ||
		dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
}

1828 1829 1830 1831 1832 1833
/**
 *	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
1834 1835 1836 1837 1838
static inline int netif_device_present(struct net_device *dev)
{
	return test_bit(__LINK_STATE_PRESENT, &dev->state);
}

1839
extern void netif_device_detach(struct net_device *dev);
L
Linus Torvalds 已提交
1840

1841
extern void netif_device_attach(struct net_device *dev);
L
Linus Torvalds 已提交
1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892

/*
 * 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;
}

1893
static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
H
Herbert Xu 已提交
1894
{
1895 1896
	spin_lock(&txq->_xmit_lock);
	txq->xmit_lock_owner = cpu;
1897 1898
}

1899 1900 1901 1902 1903 1904
static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
{
	spin_lock_bh(&txq->_xmit_lock);
	txq->xmit_lock_owner = smp_processor_id();
}

1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924
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);
}

E
Eric Dumazet 已提交
1925 1926 1927 1928 1929 1930
static inline void txq_trans_update(struct netdev_queue *txq)
{
	if (txq->xmit_lock_owner != -1)
		txq->trans_start = jiffies;
}

1931 1932 1933 1934 1935 1936
/**
 *	netif_tx_lock - grab network device transmit lock
 *	@dev: network device
 *
 * Get network device transmit lock
 */
1937 1938
static inline void netif_tx_lock(struct net_device *dev)
{
1939
	unsigned int i;
1940
	int cpu;
1941

1942 1943
	spin_lock(&dev->tx_global_lock);
	cpu = smp_processor_id();
1944 1945
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1946 1947 1948 1949 1950 1951 1952

		/* 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.
		 */
1953
		__netif_tx_lock(txq, cpu);
1954 1955
		set_bit(__QUEUE_STATE_FROZEN, &txq->state);
		__netif_tx_unlock(txq);
1956
	}
H
Herbert Xu 已提交
1957 1958 1959 1960
}

static inline void netif_tx_lock_bh(struct net_device *dev)
{
1961 1962
	local_bh_disable();
	netif_tx_lock(dev);
H
Herbert Xu 已提交
1963 1964 1965 1966
}

static inline void netif_tx_unlock(struct net_device *dev)
{
1967 1968 1969 1970
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1971

1972 1973 1974 1975 1976
		/* 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);
1977
		netif_schedule_queue(txq);
1978 1979
	}
	spin_unlock(&dev->tx_global_lock);
H
Herbert Xu 已提交
1980 1981 1982 1983
}

static inline void netif_tx_unlock_bh(struct net_device *dev)
{
1984 1985
	netif_tx_unlock(dev);
	local_bh_enable();
H
Herbert Xu 已提交
1986 1987
}

1988
#define HARD_TX_LOCK(dev, txq, cpu) {			\
1989
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
1990
		__netif_tx_lock(txq, cpu);		\
1991 1992 1993
	}						\
}

1994
#define HARD_TX_UNLOCK(dev, txq) {			\
1995
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
1996
		__netif_tx_unlock(txq);			\
1997 1998 1999
	}						\
}

L
Linus Torvalds 已提交
2000 2001
static inline void netif_tx_disable(struct net_device *dev)
{
2002
	unsigned int i;
2003
	int cpu;
2004

2005 2006
	local_bh_disable();
	cpu = smp_processor_id();
2007 2008
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2009 2010

		__netif_tx_lock(txq, cpu);
2011
		netif_tx_stop_queue(txq);
2012
		__netif_tx_unlock(txq);
2013
	}
2014
	local_bh_enable();
L
Linus Torvalds 已提交
2015 2016
}

2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036
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);
}

2037
/*
2038
 * dev_addrs walker. Should be used only for read access. Call with
2039 2040 2041
 * rcu_read_lock held.
 */
#define for_each_dev_addr(dev, ha) \
2042
		list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2043

L
Linus Torvalds 已提交
2044 2045 2046 2047 2048
/* These functions live elsewhere (drivers/net/net_init.c, but related) */

extern void		ether_setup(struct net_device *dev);

/* Support for loadable net-drivers */
2049 2050 2051 2052 2053
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
2054 2055
extern int		register_netdev(struct net_device *dev);
extern void		unregister_netdev(struct net_device *dev);
2056

2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072
/* General hardware address lists handling functions */
extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
				  struct netdev_hw_addr_list *from_list,
				  int addr_len, unsigned char addr_type);
extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
				   struct netdev_hw_addr_list *from_list,
				   int addr_len, unsigned char addr_type);
extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
			  struct netdev_hw_addr_list *from_list,
			  int addr_len);
extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
			     struct netdev_hw_addr_list *from_list,
			     int addr_len);
extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
extern void __hw_addr_init(struct netdev_hw_addr_list *list);

2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083
/* 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);
2084 2085 2086 2087 2088 2089 2090 2091 2092 2093
extern void dev_addr_flush(struct net_device *dev);
extern int dev_addr_init(struct net_device *dev);

/* Functions used for unicast addresses handling */
extern int dev_uc_add(struct net_device *dev, unsigned char *addr);
extern int dev_uc_del(struct net_device *dev, unsigned char *addr);
extern int dev_uc_sync(struct net_device *to, struct net_device *from);
extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
extern void dev_uc_flush(struct net_device *dev);
extern void dev_uc_init(struct net_device *dev);
2094

2095 2096 2097 2098 2099 2100 2101 2102 2103
/* Functions used for multicast addresses handling */
extern int dev_mc_add(struct net_device *dev, unsigned char *addr);
extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr);
extern int dev_mc_del(struct net_device *dev, unsigned char *addr);
extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr);
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);
extern void dev_mc_flush(struct net_device *dev);
extern void dev_mc_init(struct net_device *dev);
2104

2105 2106 2107
/* 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);
2108 2109
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
2110
extern void		netdev_state_change(struct net_device *dev);
2111
extern int		netdev_bonding_change(struct net_device *dev,
2112
					      unsigned long event);
2113
extern void		netdev_features_change(struct net_device *dev);
L
Linus Torvalds 已提交
2114
/* Load a device via the kmod */
2115
extern void		dev_load(struct net *net, const char *name);
L
Linus Torvalds 已提交
2116
extern void		dev_mcast_init(void);
2117
extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
2118
extern void		dev_txq_stats_fold(const struct net_device *dev, struct net_device_stats *stats);
2119

L
Linus Torvalds 已提交
2120
extern int		netdev_max_backlog;
E
Eric Dumazet 已提交
2121
extern int		netdev_tstamp_prequeue;
L
Linus Torvalds 已提交
2122 2123
extern int		weight_p;
extern int		netdev_set_master(struct net_device *dev, struct net_device *master);
2124
extern int skb_checksum_help(struct sk_buff *skb);
2125
extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
2126 2127 2128 2129 2130 2131 2132
#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
2133 2134 2135 2136
/* rx skb timestamps */
extern void		net_enable_timestamp(void);
extern void		net_disable_timestamp(void);

2137 2138 2139 2140 2141 2142
#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

2143 2144 2145
extern int netdev_class_create_file(struct class_attribute *class_attr);
extern void netdev_class_remove_file(struct class_attribute *class_attr);

2146
extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
2147

2148 2149
extern void linkwatch_run_queue(void);

2150 2151 2152
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);
2153

2154 2155 2156
void netif_stacked_transfer_operstate(const struct net_device *rootdev,
					struct net_device *dev);

2157
static inline int net_gso_ok(int features, int gso_type)
2158
{
2159
	int feature = gso_type << NETIF_F_GSO_SHIFT;
2160
	return (features & feature) == feature;
2161 2162
}

2163 2164
static inline int skb_gso_ok(struct sk_buff *skb, int features)
{
H
Herbert Xu 已提交
2165
	return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2166
	       (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST));
2167 2168
}

2169 2170
static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
{
2171 2172
	return skb_is_gso(skb) &&
	       (!skb_gso_ok(skb, dev->features) ||
2173
		unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
2174 2175
}

2176 2177 2178 2179 2180 2181
static inline void netif_set_gso_max_size(struct net_device *dev,
					  unsigned int size)
{
	dev->gso_max_size = size;
}

2182 2183
extern int __skb_bond_should_drop(struct sk_buff *skb,
				  struct net_device *master);
2184

2185 2186
static inline int skb_bond_should_drop(struct sk_buff *skb,
				       struct net_device *master)
2187
{
2188 2189
	if (master)
		return __skb_bond_should_drop(skb, master);
2190 2191 2192
	return 0;
}

2193
extern struct pernet_operations __net_initdata loopback_net_ops;
2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215

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);
}
2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285

/* Logging, debugging and troubleshooting/diagnostic helpers. */

/* netdev_printk helpers, similar to dev_printk */

static inline const char *netdev_name(const struct net_device *dev)
{
	if (dev->reg_state != NETREG_REGISTERED)
		return "(unregistered net_device)";
	return dev->name;
}

#define netdev_printk(level, netdev, format, args...)		\
	dev_printk(level, (netdev)->dev.parent,			\
		   "%s: " format,				\
		   netdev_name(netdev), ##args)

#define netdev_emerg(dev, format, args...)			\
	netdev_printk(KERN_EMERG, dev, format, ##args)
#define netdev_alert(dev, format, args...)			\
	netdev_printk(KERN_ALERT, dev, format, ##args)
#define netdev_crit(dev, format, args...)			\
	netdev_printk(KERN_CRIT, dev, format, ##args)
#define netdev_err(dev, format, args...)			\
	netdev_printk(KERN_ERR, dev, format, ##args)
#define netdev_warn(dev, format, args...)			\
	netdev_printk(KERN_WARNING, dev, format, ##args)
#define netdev_notice(dev, format, args...)			\
	netdev_printk(KERN_NOTICE, dev, format, ##args)
#define netdev_info(dev, format, args...)			\
	netdev_printk(KERN_INFO, dev, format, ##args)

#if defined(DEBUG)
#define netdev_dbg(__dev, format, args...)			\
	netdev_printk(KERN_DEBUG, __dev, format, ##args)
#elif defined(CONFIG_DYNAMIC_DEBUG)
#define netdev_dbg(__dev, format, args...)			\
do {								\
	dynamic_dev_dbg((__dev)->dev.parent, "%s: " format,	\
			netdev_name(__dev), ##args);		\
} while (0)
#else
#define netdev_dbg(__dev, format, args...)			\
({								\
	if (0)							\
		netdev_printk(KERN_DEBUG, __dev, format, ##args); \
	0;							\
})
#endif

#if defined(VERBOSE_DEBUG)
#define netdev_vdbg	netdev_dbg
#else

#define netdev_vdbg(dev, format, args...)			\
({								\
	if (0)							\
		netdev_printk(KERN_DEBUG, dev, format, ##args);	\
	0;							\
})
#endif

/*
 * netdev_WARN() acts like dev_printk(), but with the key difference
 * of using a WARN/WARN_ON to get the message out, including the
 * file/line information and a backtrace.
 */
#define netdev_WARN(dev, format, args...)			\
	WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);

2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334
/* netif printk helpers, similar to netdev_printk */

#define netif_printk(priv, type, level, dev, fmt, args...)	\
do {					  			\
	if (netif_msg_##type(priv))				\
		netdev_printk(level, (dev), fmt, ##args);	\
} while (0)

#define netif_emerg(priv, type, dev, fmt, args...)		\
	netif_printk(priv, type, KERN_EMERG, dev, fmt, ##args)
#define netif_alert(priv, type, dev, fmt, args...)		\
	netif_printk(priv, type, KERN_ALERT, dev, fmt, ##args)
#define netif_crit(priv, type, dev, fmt, args...)		\
	netif_printk(priv, type, KERN_CRIT, dev, fmt, ##args)
#define netif_err(priv, type, dev, fmt, args...)		\
	netif_printk(priv, type, KERN_ERR, dev, fmt, ##args)
#define netif_warn(priv, type, dev, fmt, args...)		\
	netif_printk(priv, type, KERN_WARNING, dev, fmt, ##args)
#define netif_notice(priv, type, dev, fmt, args...)		\
	netif_printk(priv, type, KERN_NOTICE, dev, fmt, ##args)
#define netif_info(priv, type, dev, fmt, args...)		\
	netif_printk(priv, type, KERN_INFO, (dev), fmt, ##args)

#if defined(DEBUG)
#define netif_dbg(priv, type, dev, format, args...)		\
	netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
#elif defined(CONFIG_DYNAMIC_DEBUG)
#define netif_dbg(priv, type, netdev, format, args...)		\
do {								\
	if (netif_msg_##type(priv))				\
		dynamic_dev_dbg((netdev)->dev.parent,		\
				"%s: " format,			\
				netdev_name(netdev), ##args);	\
} while (0)
#else
#define netif_dbg(priv, type, dev, format, args...)			\
({									\
	if (0)								\
		netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
	0;								\
})
#endif

#if defined(VERBOSE_DEBUG)
#define netif_vdbg	netdev_dbg
#else
#define netif_vdbg(priv, type, dev, format, args...)		\
({								\
	if (0)							\
2335
		netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2336 2337 2338
	0;							\
})
#endif
2339

L
Linus Torvalds 已提交
2340 2341
#endif /* __KERNEL__ */

2342
#endif	/* _LINUX_NETDEVICE_H */