netdevice.h 103.6 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
 *		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

28
#include <linux/pm_qos.h>
A
Al Viro 已提交
29
#include <linux/timer.h>
30
#include <linux/bug.h>
31
#include <linux/delay.h>
A
Arun Sharma 已提交
32
#include <linux/atomic.h>
L
Linus Torvalds 已提交
33 34 35 36
#include <asm/cache.h>
#include <asm/byteorder.h>

#include <linux/percpu.h>
37
#include <linux/rculist.h>
38
#include <linux/dmaengine.h>
39
#include <linux/workqueue.h>
T
Tom Herbert 已提交
40
#include <linux/dynamic_queue_limits.h>
L
Linus Torvalds 已提交
41

42
#include <linux/ethtool.h>
43
#include <net/net_namespace.h>
44
#include <net/dsa.h>
J
Jeff Kirsher 已提交
45
#ifdef CONFIG_DCB
46 47
#include <net/dcbnl.h>
#endif
48
#include <net/netprio_cgroup.h>
49

50
#include <linux/netdev_features.h>
51
#include <linux/neighbour.h>
52
#include <uapi/linux/netdevice.h>
53

54
struct netpoll_info;
55
struct device;
56
struct phy_device;
57 58
/* 802.11 specific */
struct wireless_dev;
L
Linus Torvalds 已提交
59 60 61 62
					/* source back-compat hooks */
#define SET_ETHTOOL_OPS(netdev,ops) \
	( (netdev)->ethtool_ops = (ops) )

63 64
void netdev_set_default_ethtool_ops(struct net_device *dev,
				    const struct ethtool_ops *ops);
65

66 67 68 69
/* Backlog congestion levels */
#define NET_RX_SUCCESS		0	/* keep 'em coming, baby */
#define NET_RX_DROP		1	/* packet dropped */

70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88
/*
 * 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
89 90 91 92
#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
93

94 95 96
/* 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. */
97
#define net_xmit_eval(e)	((e) == NET_XMIT_CN ? 0 : (e))
L
Linus Torvalds 已提交
98 99
#define net_xmit_errno(e)	((e) != NET_XMIT_CN ? -ENOBUFS : 0)

100
/* Driver transmit return codes */
101
#define NETDEV_TX_MASK		0xf0
102

103
enum netdev_tx {
104
	__NETDEV_TX_MIN	 = INT_MIN,	/* make sure enum is signed */
105 106 107
	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 */
108 109 110
};
typedef enum netdev_tx netdev_tx_t;

111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128
/*
 * 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
129 130 131 132
/*
 *	Compute the worst case header length according to the protocols
 *	used.
 */
G
Graf Yang 已提交
133

134
#if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
135 136 137 138 139
# if defined(CONFIG_MAC80211_MESH)
#  define LL_MAX_HEADER 128
# else
#  define LL_MAX_HEADER 96
# endif
L
Linus Torvalds 已提交
140
#else
141
# define LL_MAX_HEADER 32
L
Linus Torvalds 已提交
142 143
#endif

144 145
#if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
    !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
L
Linus Torvalds 已提交
146 147 148 149 150 151
#define MAX_HEADER LL_MAX_HEADER
#else
#define MAX_HEADER (LL_MAX_HEADER + 48)
#endif

/*
152 153
 *	Old network device statistics. Fields are native words
 *	(unsigned long) so they can be read and written atomically.
L
Linus Torvalds 已提交
154
 */
G
Graf Yang 已提交
155

E
Eric Dumazet 已提交
156
struct net_device_stats {
157 158 159 160 161 162 163 164 165
	unsigned long	rx_packets;
	unsigned long	tx_packets;
	unsigned long	rx_bytes;
	unsigned long	tx_bytes;
	unsigned long	rx_errors;
	unsigned long	tx_errors;
	unsigned long	rx_dropped;
	unsigned long	tx_dropped;
	unsigned long	multicast;
L
Linus Torvalds 已提交
166 167
	unsigned long	collisions;
	unsigned long	rx_length_errors;
168 169 170 171 172
	unsigned long	rx_over_errors;
	unsigned long	rx_crc_errors;
	unsigned long	rx_frame_errors;
	unsigned long	rx_fifo_errors;
	unsigned long	rx_missed_errors;
L
Linus Torvalds 已提交
173 174 175 176 177 178 179 180 181 182 183 184 185
	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;
	unsigned long	rx_compressed;
	unsigned long	tx_compressed;
};


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

186
#ifdef CONFIG_RPS
187 188
#include <linux/static_key.h>
extern struct static_key rps_needed;
189 190
#endif

L
Linus Torvalds 已提交
191 192 193 194
struct neighbour;
struct neigh_parms;
struct sk_buff;

195 196 197 198
struct netdev_hw_addr {
	struct list_head	list;
	unsigned char		addr[MAX_ADDR_LEN];
	unsigned char		type;
J
Jiri Pirko 已提交
199 200 201 202
#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
203 204
#define NETDEV_HW_ADDR_T_MULTICAST	5
	bool			global_use;
205
	int			sync_cnt;
206
	int			refcount;
207
	int			synced;
208 209 210
	struct rcu_head		rcu_head;
};

211 212 213 214 215
struct netdev_hw_addr_list {
	struct list_head	list;
	int			count;
};

216 217 218 219
#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)
220

221 222 223 224
#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)
225

226 227
#define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
#define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
228
#define netdev_for_each_mc_addr(ha, dev) \
229
	netdev_hw_addr_list_for_each(ha, &(dev)->mc)
230

E
Eric Dumazet 已提交
231
struct hh_cache {
232
	u16		hh_len;
233
	u16		__pad;
234
	seqlock_t	hh_lock;
L
Linus Torvalds 已提交
235 236 237 238

	/* cached hardware header; allow for machine alignment needs.        */
#define HH_DATA_MOD	16
#define HH_DATA_OFF(__len) \
J
Jiri Benc 已提交
239
	(HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
L
Linus Torvalds 已提交
240 241 242 243 244 245 246 247 248 249 250 251 252 253
#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.
 */
#define LL_RESERVED_SPACE(dev) \
254
	((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
L
Linus Torvalds 已提交
255
#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
256
	((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
L
Linus Torvalds 已提交
257

258 259 260
struct header_ops {
	int	(*create) (struct sk_buff *skb, struct net_device *dev,
			   unsigned short type, const void *daddr,
261
			   const void *saddr, unsigned int len);
262 263
	int	(*parse)(const struct sk_buff *skb, unsigned char *haddr);
	int	(*rebuild)(struct sk_buff *skb);
264
	int	(*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
265 266 267 268 269
	void	(*cache_update)(struct hh_cache *hh,
				const struct net_device *dev,
				const unsigned char *haddr);
};

L
Linus Torvalds 已提交
270 271 272 273 274
/* 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
275
enum netdev_state_t {
L
Linus Torvalds 已提交
276 277 278
	__LINK_STATE_START,
	__LINK_STATE_PRESENT,
	__LINK_STATE_NOCARRIER,
S
Stefan Rompf 已提交
279 280
	__LINK_STATE_LINKWATCH_PENDING,
	__LINK_STATE_DORMANT,
L
Linus Torvalds 已提交
281 282 283 284 285
};


/*
 * This structure holds at boot time configured netdevice settings. They
G
Graf Yang 已提交
286
 * are then used in the device probing.
L
Linus Torvalds 已提交
287 288 289 290 291 292 293
 */
struct netdev_boot_setup {
	char name[IFNAMSIZ];
	struct ifmap map;
};
#define NETDEV_BOOT_SETUP_MAX 8

294
int __init netdev_boot_setup(char *str);
L
Linus Torvalds 已提交
295

296 297 298 299 300 301 302 303 304 305 306 307 308 309
/*
 * 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;
310
	unsigned int		gro_count;
311 312 313 314 315
	int			(*poll)(struct napi_struct *, int);
#ifdef CONFIG_NETPOLL
	spinlock_t		poll_lock;
	int			poll_owner;
#endif
H
Herbert Xu 已提交
316
	struct net_device	*dev;
317
	struct sk_buff		*gro_list;
H
Herbert Xu 已提交
318
	struct sk_buff		*skb;
319
	struct list_head	dev_list;
E
Eliezer Tamir 已提交
320 321
	struct hlist_node	napi_hash_node;
	unsigned int		napi_id;
322 323
};

E
Eric Dumazet 已提交
324
enum {
325
	NAPI_STATE_SCHED,	/* Poll is scheduled */
D
David S. Miller 已提交
326
	NAPI_STATE_DISABLE,	/* Disable pending */
327
	NAPI_STATE_NPSVC,	/* Netpoll - don't dequeue from poll_list */
E
Eliezer Tamir 已提交
328
	NAPI_STATE_HASHED,	/* In NAPI hash */
329 330
};

331
enum gro_result {
332 333 334 335 336 337
	GRO_MERGED,
	GRO_MERGED_FREE,
	GRO_HELD,
	GRO_NORMAL,
	GRO_DROP,
};
338
typedef enum gro_result gro_result_t;
339

340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371
/*
 * enum rx_handler_result - Possible return values for rx_handlers.
 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
 * further.
 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
 * case skb->dev was changed by rx_handler.
 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
 *
 * rx_handlers are functions called from inside __netif_receive_skb(), to do
 * special processing of the skb, prior to delivery to protocol handlers.
 *
 * Currently, a net_device can only have a single rx_handler registered. Trying
 * to register a second rx_handler will return -EBUSY.
 *
 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
 * To unregister a rx_handler on a net_device, use
 * netdev_rx_handler_unregister().
 *
 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
 * do with the skb.
 *
 * If the rx_handler consumed to skb in some way, it should return
 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
 * the skb to be delivered in some other ways.
 *
 * If the rx_handler changed skb->dev, to divert the skb to another
 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
 * new device will be called if it exists.
 *
 * If the rx_handler consider the skb should be ignored, it should return
 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
372
 * are registered on exact device (ptype->dev == skb->dev).
373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388
 *
 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
 * delivered, it should return RX_HANDLER_PASS.
 *
 * A device without a registered rx_handler will behave as if rx_handler
 * returned RX_HANDLER_PASS.
 */

enum rx_handler_result {
	RX_HANDLER_CONSUMED,
	RX_HANDLER_ANOTHER,
	RX_HANDLER_EXACT,
	RX_HANDLER_PASS,
};
typedef enum rx_handler_result rx_handler_result_t;
typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
389

390
void __napi_schedule(struct napi_struct *n);
391

392
static inline bool napi_disable_pending(struct napi_struct *n)
D
David S. Miller 已提交
393 394 395 396
{
	return test_bit(NAPI_STATE_DISABLE, &n->state);
}

397 398 399 400 401 402
/**
 *	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
403 404
 * insure only one NAPI poll instance runs.  We also make
 * sure there is no pending NAPI disable.
405
 */
406
static inline bool napi_schedule_prep(struct napi_struct *n)
407
{
D
David S. Miller 已提交
408 409
	return !napi_disable_pending(n) &&
		!test_and_set_bit(NAPI_STATE_SCHED, &n->state);
410 411 412 413 414 415 416 417 418 419 420 421 422 423 424
}

/**
 *	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);
}

425
/* Try to reschedule poll. Called by dev->poll() after napi_complete().  */
426
static inline bool napi_reschedule(struct napi_struct *napi)
427 428 429
{
	if (napi_schedule_prep(napi)) {
		__napi_schedule(napi);
430
		return true;
431
	}
432
	return false;
433 434
}

435 436 437 438 439 440
/**
 *	napi_complete - NAPI processing complete
 *	@n: napi context
 *
 * Mark NAPI processing as complete.
 */
441 442
void __napi_complete(struct napi_struct *n);
void napi_complete(struct napi_struct *n);
443

E
Eliezer Tamir 已提交
444 445 446 447 448 449 450
/**
 *	napi_by_id - lookup a NAPI by napi_id
 *	@napi_id: hashed napi_id
 *
 * lookup @napi_id in napi_hash table
 * must be called under rcu_read_lock()
 */
451
struct napi_struct *napi_by_id(unsigned int napi_id);
E
Eliezer Tamir 已提交
452 453 454 455 456 457 458

/**
 *	napi_hash_add - add a NAPI to global hashtable
 *	@napi: napi context
 *
 * generate a new napi_id and store a @napi under it in napi_hash
 */
459
void napi_hash_add(struct napi_struct *napi);
E
Eliezer Tamir 已提交
460 461 462 463 464 465 466 467

/**
 *	napi_hash_del - remove a NAPI from global table
 *	@napi: napi context
 *
 * Warning: caller must observe rcu grace period
 * before freeing memory containing @napi
 */
468
void napi_hash_del(struct napi_struct *napi);
E
Eliezer Tamir 已提交
469

470 471 472 473 474 475 476 477 478
/**
 *	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)
{
479
	might_sleep();
D
David S. Miller 已提交
480
	set_bit(NAPI_STATE_DISABLE, &n->state);
481
	while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
482
		msleep(1);
D
David S. Miller 已提交
483
	clear_bit(NAPI_STATE_DISABLE, &n->state);
484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499
}

/**
 *	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);
}

500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517
#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
518
enum netdev_queue_state_t {
519 520
	__QUEUE_STATE_DRV_XOFF,
	__QUEUE_STATE_STACK_XOFF,
521
	__QUEUE_STATE_FROZEN,
522
};
523 524 525 526 527 528 529 530 531 532 533

#define QUEUE_STATE_DRV_XOFF	(1 << __QUEUE_STATE_DRV_XOFF)
#define QUEUE_STATE_STACK_XOFF	(1 << __QUEUE_STATE_STACK_XOFF)
#define QUEUE_STATE_FROZEN	(1 << __QUEUE_STATE_FROZEN)

#define QUEUE_STATE_ANY_XOFF	(QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
#define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
					QUEUE_STATE_FROZEN)
#define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
					QUEUE_STATE_FROZEN)

534 535 536 537 538 539 540 541 542
/*
 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue.  The
 * netif_tx_* functions below are used to manipulate this flag.  The
 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
 * queue independently.  The netif_xmit_*stopped functions below are called
 * to check if the queue has been stopped by the driver or stack (either
 * of the XOFF bits are set in the state).  Drivers should not need to call
 * netif_xmit*stopped functions, they should only be using netif_tx_*.
 */
543

544
struct netdev_queue {
545 546 547
/*
 * read mostly part
 */
548
	struct net_device	*dev;
549 550
	struct Qdisc		*qdisc;
	struct Qdisc		*qdisc_sleeping;
551
#ifdef CONFIG_SYSFS
T
Tom Herbert 已提交
552 553
	struct kobject		kobj;
#endif
554 555 556
#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
	int			numa_node;
#endif
557 558 559 560 561
/*
 * write mostly part
 */
	spinlock_t		_xmit_lock ____cacheline_aligned_in_smp;
	int			xmit_lock_owner;
562 563 564 565
	/*
	 * please use this field instead of dev->trans_start
	 */
	unsigned long		trans_start;
566 567 568 569 570 571

	/*
	 * Number of TX timeouts for this queue
	 * (/sys/class/net/DEV/Q/trans_timeout)
	 */
	unsigned long		trans_timeout;
T
Tom Herbert 已提交
572 573 574 575 576 577

	unsigned long		state;

#ifdef CONFIG_BQL
	struct dql		dql;
#endif
578
} ____cacheline_aligned_in_smp;
579

580 581 582 583 584
static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
{
#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
	return q->numa_node;
#else
585
	return NUMA_NO_NODE;
586 587 588 589 590 591 592 593 594 595
#endif
}

static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
{
#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
	q->numa_node = node;
#endif
}

E
Eric Dumazet 已提交
596
#ifdef CONFIG_RPS
T
Tom Herbert 已提交
597 598 599 600 601 602 603 604 605
/*
 * 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];
};
606
#define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
T
Tom Herbert 已提交
607

T
Tom Herbert 已提交
608
/*
609 610 611
 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
 * tail pointer for that CPU's input queue at the time of last enqueue, and
 * a hardware filter index.
T
Tom Herbert 已提交
612 613 614
 */
struct rps_dev_flow {
	u16 cpu;
615
	u16 filter;
T
Tom Herbert 已提交
616 617
	unsigned int last_qtail;
};
618
#define RPS_NO_FILTER 0xffff
T
Tom Herbert 已提交
619 620 621 622 623 624 625 626 627 628

/*
 * 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 rps_dev_flow flows[0];
};
#define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
629
    ((_num) * sizeof(struct rps_dev_flow)))
T
Tom Herbert 已提交
630 631 632 633 634 635 636 637 638 639

/*
 * 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) + \
640
    ((_num) * sizeof(u16)))
T
Tom Herbert 已提交
641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664

#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;
}

E
Eric Dumazet 已提交
665
extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
T
Tom Herbert 已提交
666

667
#ifdef CONFIG_RFS_ACCEL
668 669
bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
			 u16 filter_id);
670
#endif
671
#endif /* CONFIG_RPS */
672

T
Tom Herbert 已提交
673 674
/* This structure contains an instance of an RX queue. */
struct netdev_rx_queue {
675
#ifdef CONFIG_RPS
E
Eric Dumazet 已提交
676 677
	struct rps_map __rcu		*rps_map;
	struct rps_dev_flow_table __rcu	*rps_flow_table;
678
#endif
E
Eric Dumazet 已提交
679
	struct kobject			kobj;
T
Tom Herbert 已提交
680
	struct net_device		*dev;
T
Tom Herbert 已提交
681
} ____cacheline_aligned_in_smp;
682 683 684 685 686 687 688 689 690 691 692

/*
 * RX queue sysfs structures and functions.
 */
struct rx_queue_attribute {
	struct attribute attr;
	ssize_t (*show)(struct netdev_rx_queue *queue,
	    struct rx_queue_attribute *attr, char *buf);
	ssize_t (*store)(struct netdev_rx_queue *queue,
	    struct rx_queue_attribute *attr, const char *buf, size_t len);
};
693

T
Tom Herbert 已提交
694 695 696 697 698 699 700 701 702 703 704
#ifdef CONFIG_XPS
/*
 * This structure holds an XPS map which can be of variable length.  The
 * map is an array of queues.
 */
struct xps_map {
	unsigned int len;
	unsigned int alloc_len;
	struct rcu_head rcu;
	u16 queues[0];
};
705
#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
T
Tom Herbert 已提交
706 707 708 709 710 711 712 713
#define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map))	\
    / sizeof(u16))

/*
 * This structure holds all XPS maps for device.  Maps are indexed by CPU.
 */
struct xps_dev_maps {
	struct rcu_head rcu;
E
Eric Dumazet 已提交
714
	struct xps_map __rcu *cpu_map[0];
T
Tom Herbert 已提交
715 716 717 718 719
};
#define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) +		\
    (nr_cpu_ids * sizeof(struct xps_map *)))
#endif /* CONFIG_XPS */

720 721 722 723 724 725 726 727
#define TC_MAX_QUEUE	16
#define TC_BITMASK	15
/* HW offloaded queuing disciplines txq count and offset maps */
struct netdev_tc_txq {
	u16 count;
	u16 offset;
};

728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744
#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
/*
 * This structure is to hold information about the device
 * configured to run FCoE protocol stack.
 */
struct netdev_fcoe_hbainfo {
	char	manufacturer[64];
	char	serial_number[64];
	char	hardware_version[64];
	char	driver_version[64];
	char	optionrom_version[64];
	char	firmware_version[64];
	char	model[256];
	char	model_description[256];
};
#endif

745 746 747 748 749 750 751 752 753 754
#define MAX_PHYS_PORT_ID_LEN 32

/* This structure holds a unique identifier to identify the
 * physical port used by a netdevice.
 */
struct netdev_phys_port_id {
	unsigned char id[MAX_PHYS_PORT_ID_LEN];
	unsigned char id_len;
};

755 756 757
typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
				       struct sk_buff *skb);

758 759
/*
 * This structure defines the management hooks for network devices.
760 761
 * The following hooks can be defined; unless noted otherwise, they are
 * optional and can be filled with a null pointer.
762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780
 *
 * 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.
 *
781 782
 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
 *                               struct net_device *dev);
783
 *	Called when a packet needs to be transmitted.
784 785
 *	Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
 *        (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
786 787
 *	Required can not be NULL.
 *
788
 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
789
 *                         void *accel_priv, select_queue_fallback_t fallback);
790 791 792
 *	Called to decide which queue to when device supports multiple
 *	transmit queues.
 *
793 794 795 796 797 798
 * 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.
799 800
 *	If driver handles unicast address filtering, it should set
 *	IFF_UNICAST_FLT to its priv_flags.
801 802 803
 *
 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
 *	This function  is called when the Media Access Control address
804
 *	needs to be changed. If this interface is not defined, the
805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824
 *	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.
 *
825
 * void (*ndo_tx_timeout)(struct net_device *dev);
826 827 828
 *	Callback uses when the transmitter has not made any progress
 *	for dev->watchdog ticks.
 *
829
 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
830
 *                      struct rtnl_link_stats64 *storage);
831
 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
832
 *	Called when a user wants to get the network device usage
833
 *	statistics. Drivers must do one of the following:
834 835
 *	1. Define @ndo_get_stats64 to fill in a zero-initialised
 *	   rtnl_link_stats64 structure passed by the caller.
836
 *	2. Define @ndo_get_stats to update a net_device_stats structure
837 838 839 840 841
 *	   (which should normally be dev->stats) and return a pointer to
 *	   it. The structure may be changed asynchronously only if each
 *	   field is written atomically.
 *	3. Update dev->stats asynchronously and atomically, and define
 *	   neither operation.
842
 *
843 844 845
 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16t vid);
 *	If device support VLAN filtering this function is called when a
 *	VLAN id is registered.
846
 *
847
 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
848 849
 *	If device support VLAN filtering this function is called when a
 *	VLAN id is unregistered.
850 851
 *
 * void (*ndo_poll_controller)(struct net_device *dev);
852 853 854 855 856
 *
 *	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);
857
 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
858 859
 * int (*ndo_get_vf_config)(struct net_device *dev,
 *			    int vf, struct ifla_vf_info *ivf);
860
 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
861 862 863
 * 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);
864 865 866 867 868
 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
 * 	Called to setup 'tc' number of traffic classes in the net device. This
 * 	is always called from the stack with the rtnl lock held and netif tx
 * 	queues stopped. This allows the netdevice to perform queue management
 * 	safely.
869
 *
870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899
 *	Fiber Channel over Ethernet (FCoE) offload functions.
 * int (*ndo_fcoe_enable)(struct net_device *dev);
 *	Called when the FCoE protocol stack wants to start using LLD for FCoE
 *	so the underlying device can perform whatever needed configuration or
 *	initialization to support acceleration of FCoE traffic.
 *
 * int (*ndo_fcoe_disable)(struct net_device *dev);
 *	Called when the FCoE protocol stack wants to stop using LLD for FCoE
 *	so the underlying device can perform whatever needed clean-ups to
 *	stop supporting acceleration of FCoE traffic.
 *
 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
 *			     struct scatterlist *sgl, unsigned int sgc);
 *	Called when the FCoE Initiator wants to initialize an I/O that
 *	is a possible candidate for Direct Data Placement (DDP). The LLD can
 *	perform necessary setup and returns 1 to indicate the device is set up
 *	successfully to perform DDP on this I/O, otherwise this returns 0.
 *
 * int (*ndo_fcoe_ddp_done)(struct net_device *dev,  u16 xid);
 *	Called when the FCoE Initiator/Target is done with the DDPed I/O as
 *	indicated by the FC exchange id 'xid', so the underlying device can
 *	clean up and reuse resources for later DDP requests.
 *
 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
 *			      struct scatterlist *sgl, unsigned int sgc);
 *	Called when the FCoE Target wants to initialize an I/O that
 *	is a possible candidate for Direct Data Placement (DDP). The LLD can
 *	perform necessary setup and returns 1 to indicate the device is set up
 *	successfully to perform DDP on this I/O, otherwise this returns 0.
 *
900 901 902 903 904 905 906
 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
 *			       struct netdev_fcoe_hbainfo *hbainfo);
 *	Called when the FCoE Protocol stack wants information on the underlying
 *	device. This information is utilized by the FCoE protocol stack to
 *	register attributes with Fiber Channel management service as per the
 *	FC-GS Fabric Device Management Information(FDMI) specification.
 *
907 908 909 910 911 912
 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
 *	Called when the underlying device wants to override default World Wide
 *	Name (WWN) generation mechanism in FCoE protocol stack to pass its own
 *	World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
 *	protocol stack to use.
 *
913 914 915 916 917 918
 *	RFS acceleration.
 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
 *			    u16 rxq_index, u32 flow_id);
 *	Set hardware filter for RFS.  rxq_index is the target queue index;
 *	flow_id is a flow ID to be passed to rps_may_expire_flow() later.
 *	Return the filter ID on success, or a negative error code.
919
 *
920
 *	Slave management functions (for bridge, bonding, etc).
921 922 923 924 925
 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
 *	Called to make another netdev an underling.
 *
 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
 *	Called to release previously enslaved netdev.
926 927
 *
 *      Feature/offload setting functions.
928 929
 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
 *		netdev_features_t features);
930 931 932 933
 *	Adjusts the requested feature flags according to device-specific
 *	constraints, and returns the resulting flags. Must not modify
 *	the device state.
 *
934
 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
935 936 937 938
 *	Called to update device configuration to new features. Passed
 *	feature set might be less than what was returned by ndo_fix_features()).
 *	Must return >0 or -errno if it changed dev->features itself.
 *
939 940
 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
 *		      struct net_device *dev,
941
 *		      const unsigned char *addr, u16 flags)
942
 *	Adds an FDB entry to dev for addr.
943 944
 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
 *		      struct net_device *dev,
945
 *		      const unsigned char *addr)
946 947 948 949 950
 *	Deletes the FDB entry from dev coresponding to addr.
 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
 *		       struct net_device *dev, int idx)
 *	Used to add FDB entries to dump requests. Implementers should add
 *	entries to skb and update idx with the number of entries.
J
John Fastabend 已提交
951 952 953
 *
 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh)
 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
954
 *			     struct net_device *dev, u32 filter_mask)
J
Jiri Pirko 已提交
955 956 957 958 959 960 961 962
 *
 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
 *	Called to change device carrier. Soft-devices (like dummy, team, etc)
 *	which do not represent real hardware may define this to allow their
 *	userspace components to manage their virtual carrier state. Devices
 *	that determine carrier state from physical hardware properties (eg
 *	network cables) or protocol-dependent mechanisms (eg
 *	USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
963 964 965 966 967 968
 *
 * int (*ndo_get_phys_port_id)(struct net_device *dev,
 *			       struct netdev_phys_port_id *ppid);
 *	Called to get ID of physical port of this device. If driver does
 *	not implement this, it is assumed that the hw is not able to have
 *	multiple net devices on single physical port.
969 970
 *
 * void (*ndo_add_vxlan_port)(struct  net_device *dev,
J
Joseph Gasparakis 已提交
971
 *			      sa_family_t sa_family, __be16 port);
972 973 974 975 976 977
 *	Called by vxlan to notiy a driver about the UDP port and socket
 *	address family that vxlan is listnening to. It is called only when
 *	a new port starts listening. The operation is protected by the
 *	vxlan_net->sock_lock.
 *
 * void (*ndo_del_vxlan_port)(struct  net_device *dev,
J
Joseph Gasparakis 已提交
978
 *			      sa_family_t sa_family, __be16 port);
979 980 981
 *	Called by vxlan to notify the driver about a UDP port and socket
 *	address family that vxlan is not listening to anymore. The operation
 *	is protected by the vxlan_net->sock_lock.
982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000
 *
 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
 *				 struct net_device *dev)
 *	Called by upper layer devices to accelerate switching or other
 *	station functionality into hardware. 'pdev is the lowerdev
 *	to use for the offload and 'dev' is the net device that will
 *	back the offload. Returns a pointer to the private structure
 *	the upper layer will maintain.
 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
 *	Called by upper layer device to delete the station created
 *	by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
 *	the station and priv is the structure returned by the add
 *	operation.
 * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb,
 *				      struct net_device *dev,
 *				      void *priv);
 *	Callback to use for xmit over the accelerated station. This
 *	is used in place of ndo_start_xmit on accelerated net
 *	devices.
1001 1002 1003 1004 1005 1006
 */
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);
1007
	netdev_tx_t		(*ndo_start_xmit) (struct sk_buff *skb,
1008 1009
						   struct net_device *dev);
	u16			(*ndo_select_queue)(struct net_device *dev,
1010
						    struct sk_buff *skb,
1011 1012
						    void *accel_priv,
						    select_queue_fallback_t fallback);
1013 1014 1015 1016 1017 1018 1019 1020 1021 1022
	void			(*ndo_change_rx_flags)(struct net_device *dev,
						       int flags);
	void			(*ndo_set_rx_mode)(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);
1023 1024 1025 1026
	int			(*ndo_change_mtu)(struct net_device *dev,
						  int new_mtu);
	int			(*ndo_neigh_setup)(struct net_device *dev,
						   struct neigh_parms *);
1027 1028
	void			(*ndo_tx_timeout) (struct net_device *dev);

1029 1030
	struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
						     struct rtnl_link_stats64 *storage);
1031 1032
	struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);

1033
	int			(*ndo_vlan_rx_add_vid)(struct net_device *dev,
1034
						       __be16 proto, u16 vid);
1035
	int			(*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1036
						        __be16 proto, u16 vid);
1037 1038
#ifdef CONFIG_NET_POLL_CONTROLLER
	void                    (*ndo_poll_controller)(struct net_device *dev);
H
Herbert Xu 已提交
1039
	int			(*ndo_netpoll_setup)(struct net_device *dev,
1040
						     struct netpoll_info *info);
1041
	void			(*ndo_netpoll_cleanup)(struct net_device *dev);
E
Eliezer Tamir 已提交
1042
#endif
1043
#ifdef CONFIG_NET_RX_BUSY_POLL
1044
	int			(*ndo_busy_poll)(struct napi_struct *dev);
1045
#endif
1046 1047 1048 1049 1050 1051
	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);
1052 1053
	int			(*ndo_set_vf_spoofchk)(struct net_device *dev,
						       int vf, bool setting);
1054 1055 1056
	int			(*ndo_get_vf_config)(struct net_device *dev,
						     int vf,
						     struct ifla_vf_info *ivf);
1057 1058
	int			(*ndo_set_vf_link_state)(struct net_device *dev,
							 int vf, int link_state);
1059 1060 1061 1062 1063
	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);
1064
	int			(*ndo_setup_tc)(struct net_device *dev, u8 tc);
1065
#if IS_ENABLED(CONFIG_FCOE)
1066 1067
	int			(*ndo_fcoe_enable)(struct net_device *dev);
	int			(*ndo_fcoe_disable)(struct net_device *dev);
1068 1069 1070 1071 1072 1073
	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);
1074 1075 1076 1077
	int			(*ndo_fcoe_ddp_target)(struct net_device *dev,
						       u16 xid,
						       struct scatterlist *sgl,
						       unsigned int sgc);
1078 1079
	int			(*ndo_fcoe_get_hbainfo)(struct net_device *dev,
							struct netdev_fcoe_hbainfo *hbainfo);
1080 1081
#endif

1082
#if IS_ENABLED(CONFIG_LIBFCOE)
1083 1084 1085 1086
#define NETDEV_FCOE_WWNN 0
#define NETDEV_FCOE_WWPN 1
	int			(*ndo_fcoe_get_wwn)(struct net_device *dev,
						    u64 *wwn, int type);
1087
#endif
1088

1089 1090 1091 1092 1093 1094
#ifdef CONFIG_RFS_ACCEL
	int			(*ndo_rx_flow_steer)(struct net_device *dev,
						     const struct sk_buff *skb,
						     u16 rxq_index,
						     u32 flow_id);
#endif
1095 1096 1097 1098
	int			(*ndo_add_slave)(struct net_device *dev,
						 struct net_device *slave_dev);
	int			(*ndo_del_slave)(struct net_device *dev,
						 struct net_device *slave_dev);
1099 1100
	netdev_features_t	(*ndo_fix_features)(struct net_device *dev,
						    netdev_features_t features);
1101
	int			(*ndo_set_features)(struct net_device *dev,
1102
						    netdev_features_t features);
1103
	int			(*ndo_neigh_construct)(struct neighbour *n);
1104
	void			(*ndo_neigh_destroy)(struct neighbour *n);
1105 1106

	int			(*ndo_fdb_add)(struct ndmsg *ndm,
1107
					       struct nlattr *tb[],
1108
					       struct net_device *dev,
1109
					       const unsigned char *addr,
1110 1111
					       u16 flags);
	int			(*ndo_fdb_del)(struct ndmsg *ndm,
1112
					       struct nlattr *tb[],
1113
					       struct net_device *dev,
1114
					       const unsigned char *addr);
1115 1116 1117 1118
	int			(*ndo_fdb_dump)(struct sk_buff *skb,
						struct netlink_callback *cb,
						struct net_device *dev,
						int idx);
J
John Fastabend 已提交
1119 1120 1121 1122 1123

	int			(*ndo_bridge_setlink)(struct net_device *dev,
						      struct nlmsghdr *nlh);
	int			(*ndo_bridge_getlink)(struct sk_buff *skb,
						      u32 pid, u32 seq,
1124 1125
						      struct net_device *dev,
						      u32 filter_mask);
1126 1127
	int			(*ndo_bridge_dellink)(struct net_device *dev,
						      struct nlmsghdr *nlh);
J
Jiri Pirko 已提交
1128 1129
	int			(*ndo_change_carrier)(struct net_device *dev,
						      bool new_carrier);
1130 1131
	int			(*ndo_get_phys_port_id)(struct net_device *dev,
							struct netdev_phys_port_id *ppid);
1132 1133
	void			(*ndo_add_vxlan_port)(struct  net_device *dev,
						      sa_family_t sa_family,
J
Joseph Gasparakis 已提交
1134
						      __be16 port);
1135 1136
	void			(*ndo_del_vxlan_port)(struct  net_device *dev,
						      sa_family_t sa_family,
J
Joseph Gasparakis 已提交
1137
						      __be16 port);
1138 1139 1140 1141 1142 1143 1144 1145 1146

	void*			(*ndo_dfwd_add_station)(struct net_device *pdev,
							struct net_device *dev);
	void			(*ndo_dfwd_del_station)(struct net_device *pdev,
							void *priv);

	netdev_tx_t		(*ndo_dfwd_start_xmit) (struct sk_buff *skb,
							struct net_device *dev,
							void *priv);
1147 1148
};

1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231
/**
 * enum net_device_priv_flags - &struct net_device priv_flags
 *
 * These are the &struct net_device, they are only set internally
 * by drivers and used in the kernel. These flags are invisible to
 * userspace, this means that the order of these flags can change
 * during any kernel release.
 *
 * You should have a pretty good reason to be extending these flags.
 *
 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
 * @IFF_EBRIDGE: Ethernet bridging device
 * @IFF_SLAVE_INACTIVE: bonding slave not the curr. active
 * @IFF_MASTER_8023AD: bonding master, 802.3ad
 * @IFF_MASTER_ALB: bonding master, balance-alb
 * @IFF_BONDING: bonding master or slave
 * @IFF_SLAVE_NEEDARP: need ARPs for validation
 * @IFF_ISATAP: ISATAP interface (RFC4214)
 * @IFF_MASTER_ARPMON: bonding master, ARP mon in use
 * @IFF_WAN_HDLC: WAN HDLC device
 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
 *	release skb->dst
 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
 * @IFF_MACVLAN_PORT: device used as macvlan port
 * @IFF_BRIDGE_PORT: device used as bridge port
 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
 * @IFF_UNICAST_FLT: Supports unicast filtering
 * @IFF_TEAM_PORT: device used as team port
 * @IFF_SUPP_NOFCS: device supports sending custom FCS
 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
 *	change when it's running
 * @IFF_MACVLAN: Macvlan device
 */
enum netdev_priv_flags {
	IFF_802_1Q_VLAN			= 1<<0,
	IFF_EBRIDGE			= 1<<1,
	IFF_SLAVE_INACTIVE		= 1<<2,
	IFF_MASTER_8023AD		= 1<<3,
	IFF_MASTER_ALB			= 1<<4,
	IFF_BONDING			= 1<<5,
	IFF_SLAVE_NEEDARP		= 1<<6,
	IFF_ISATAP			= 1<<7,
	IFF_MASTER_ARPMON		= 1<<8,
	IFF_WAN_HDLC			= 1<<9,
	IFF_XMIT_DST_RELEASE		= 1<<10,
	IFF_DONT_BRIDGE			= 1<<11,
	IFF_DISABLE_NETPOLL		= 1<<12,
	IFF_MACVLAN_PORT		= 1<<13,
	IFF_BRIDGE_PORT			= 1<<14,
	IFF_OVS_DATAPATH		= 1<<15,
	IFF_TX_SKB_SHARING		= 1<<16,
	IFF_UNICAST_FLT			= 1<<17,
	IFF_TEAM_PORT			= 1<<18,
	IFF_SUPP_NOFCS			= 1<<19,
	IFF_LIVE_ADDR_CHANGE		= 1<<20,
	IFF_MACVLAN			= 1<<21,
};

#define IFF_802_1Q_VLAN			IFF_802_1Q_VLAN
#define IFF_EBRIDGE			IFF_EBRIDGE
#define IFF_SLAVE_INACTIVE		IFF_SLAVE_INACTIVE
#define IFF_MASTER_8023AD		IFF_MASTER_8023AD
#define IFF_MASTER_ALB			IFF_MASTER_ALB
#define IFF_BONDING			IFF_BONDING
#define IFF_SLAVE_NEEDARP		IFF_SLAVE_NEEDARP
#define IFF_ISATAP			IFF_ISATAP
#define IFF_MASTER_ARPMON		IFF_MASTER_ARPMON
#define IFF_WAN_HDLC			IFF_WAN_HDLC
#define IFF_XMIT_DST_RELEASE		IFF_XMIT_DST_RELEASE
#define IFF_DONT_BRIDGE			IFF_DONT_BRIDGE
#define IFF_DISABLE_NETPOLL		IFF_DISABLE_NETPOLL
#define IFF_MACVLAN_PORT		IFF_MACVLAN_PORT
#define IFF_BRIDGE_PORT			IFF_BRIDGE_PORT
#define IFF_OVS_DATAPATH		IFF_OVS_DATAPATH
#define IFF_TX_SKB_SHARING		IFF_TX_SKB_SHARING
#define IFF_UNICAST_FLT			IFF_UNICAST_FLT
#define IFF_TEAM_PORT			IFF_TEAM_PORT
#define IFF_SUPP_NOFCS			IFF_SUPP_NOFCS
#define IFF_LIVE_ADDR_CHANGE		IFF_LIVE_ADDR_CHANGE
#define IFF_MACVLAN			IFF_MACVLAN

L
Linus Torvalds 已提交
1232 1233 1234 1235 1236 1237 1238 1239 1240 1241
/*
 *	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
1242
struct net_device {
L
Linus Torvalds 已提交
1243 1244 1245 1246

	/*
	 * 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
1247
	 * of the interface.
L
Linus Torvalds 已提交
1248 1249
	 */
	char			name[IFNAMSIZ];
M
Mark Gross 已提交
1250

1251
	/* device name hash chain, please keep it close to name[] */
1252
	struct hlist_node	name_hlist;
1253

1254 1255
	/* snmp alias */
	char 			*ifalias;
L
Linus Torvalds 已提交
1256 1257 1258 1259 1260 1261 1262 1263

	/*
	 *	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	*/
1264
	int			irq;		/* device IRQ number	*/
L
Linus Torvalds 已提交
1265 1266 1267 1268 1269 1270 1271 1272

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

	unsigned long		state;

1273
	struct list_head	dev_list;
1274
	struct list_head	napi_list;
1275
	struct list_head	unreg_list;
1276
	struct list_head	close_list;
1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288

	/* directly linked devices, like slaves for bonding */
	struct {
		struct list_head upper;
		struct list_head lower;
	} adj_list;

	/* all linked devices, *including* neighbours */
	struct {
		struct list_head upper;
		struct list_head lower;
	} all_adj_list;
1289

L
Linus Torvalds 已提交
1290

1291
	/* currently active device features */
1292
	netdev_features_t	features;
1293
	/* user-changeable features */
1294
	netdev_features_t	hw_features;
1295
	/* user-requested features */
1296
	netdev_features_t	wanted_features;
1297
	/* mask of features inheritable by VLAN devices */
1298
	netdev_features_t	vlan_features;
1299 1300 1301 1302 1303 1304
	/* mask of features inherited by encapsulating devices
	 * This field indicates what encapsulation offloads
	 * the hardware is capable of doing, and drivers will
	 * need to set them appropriately.
	 */
	netdev_features_t	hw_enc_features;
S
Simon Horman 已提交
1305 1306
	/* mask of fetures inheritable by MPLS */
	netdev_features_t	mpls_features;
1307

L
Linus Torvalds 已提交
1308 1309 1310 1311
	/* Interface index. Unique device identifier	*/
	int			ifindex;
	int			iflink;

R
Rusty Russell 已提交
1312
	struct net_device_stats	stats;
1313 1314 1315 1316

	/* dropped packets by core network, Do not use this in drivers */
	atomic_long_t		rx_dropped;
	atomic_long_t		tx_dropped;
L
Linus Torvalds 已提交
1317

1318 1319 1320
	/* Stats to monitor carrier on<->off transitions */
	atomic_t		carrier_changes;

1321
#ifdef CONFIG_WIRELESS_EXT
L
Linus Torvalds 已提交
1322 1323 1324 1325 1326
	/* 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;
1327
#endif
1328 1329
	/* Management operations */
	const struct net_device_ops *netdev_ops;
1330
	const struct ethtool_ops *ethtool_ops;
1331
	const struct forwarding_accel_ops *fwd_ops;
L
Linus Torvalds 已提交
1332

1333 1334 1335
	/* Hardware header description */
	const struct header_ops *header_ops;

S
Stefan Rompf 已提交
1336
	unsigned int		flags;	/* interface flags (a la BSD)	*/
1337 1338
	unsigned int		priv_flags; /* Like 'flags' but invisible to userspace.
					     * See if.h for definitions. */
L
Linus Torvalds 已提交
1339 1340 1341
	unsigned short		gflags;
	unsigned short		padded;	/* How much padding added by alloc_netdev() */

S
Stefan Rompf 已提交
1342 1343 1344
	unsigned char		operstate; /* RFC2863 operstate */
	unsigned char		link_mode; /* mapping policy to operstate */

1345 1346 1347
	unsigned char		if_port;	/* Selectable AUI, TP,..*/
	unsigned char		dma;		/* DMA channel		*/

1348
	unsigned int		mtu;	/* interface MTU value		*/
L
Linus Torvalds 已提交
1349 1350 1351
	unsigned short		type;	/* interface hardware type	*/
	unsigned short		hard_header_len;	/* hardware hdr length	*/

1352 1353 1354 1355 1356 1357 1358
	/* 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
1359
	/* Interface address info. */
1360
	unsigned char		perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1361
	unsigned char		addr_assign_type; /* hw address assignment type */
L
Linus Torvalds 已提交
1362
	unsigned char		addr_len;	/* hardware address length	*/
1363
	unsigned short		neigh_priv_len;
1364 1365 1366 1367
	unsigned short          dev_id;		/* Used to differentiate devices
						 * that share the same link
						 * layer address
						 */
A
Amir Vadai 已提交
1368 1369 1370 1371
	unsigned short          dev_port;	/* Used to differentiate
						 * devices that share the same
						 * function
						 */
J
Jiri Pirko 已提交
1372
	spinlock_t		addr_list_lock;
1373 1374
	struct netdev_hw_addr_list	uc;	/* Unicast mac addresses */
	struct netdev_hw_addr_list	mc;	/* Multicast mac addresses */
1375 1376 1377 1378 1379 1380 1381
	struct netdev_hw_addr_list	dev_addrs; /* list of device
						    * hw addresses
						    */
#ifdef CONFIG_SYSFS
	struct kset		*queues_kset;
#endif

1382
	bool			uc_promisc;
1383 1384
	unsigned int		promiscuity;
	unsigned int		allmulti;
L
Linus Torvalds 已提交
1385 1386 1387


	/* Protocol specific pointers */
1388

1389
#if IS_ENABLED(CONFIG_VLAN_8021Q)
1390
	struct vlan_info __rcu	*vlan_info;	/* VLAN info */
1391
#endif
1392
#if IS_ENABLED(CONFIG_NET_DSA)
1393
	struct dsa_switch_tree	*dsa_ptr;	/* dsa specific data */
1394 1395 1396
#endif
#if IS_ENABLED(CONFIG_TIPC)
	struct tipc_bearer __rcu *tipc_ptr;	/* TIPC specific data */
1397
#endif
L
Linus Torvalds 已提交
1398
	void 			*atalk_ptr;	/* AppleTalk link 	*/
E
Eric Dumazet 已提交
1399
	struct in_device __rcu	*ip_ptr;	/* IPv4 specific data	*/
1400
	struct dn_dev __rcu     *dn_ptr;        /* DECnet specific data */
E
Eric Dumazet 已提交
1401
	struct inet6_dev __rcu	*ip6_ptr;       /* IPv6 specific data */
L
Linus Torvalds 已提交
1402
	void			*ax25_ptr;	/* AX.25 specific data */
1403 1404
	struct wireless_dev	*ieee80211_ptr;	/* IEEE 802.11 specific data,
						   assign before registering */
L
Linus Torvalds 已提交
1405

1406
/*
E
Eric Dumazet 已提交
1407
 * Cache lines mostly used on receive path (including eth_type_trans())
1408
 */
1409
	unsigned long		last_rx;	/* Time of last Rx */
1410

1411
	/* Interface address info used in eth_type_trans() */
1412 1413 1414 1415
	unsigned char		*dev_addr;	/* hw address, (before bcast
						   because most packets are
						   unicast) */

T
Tom Herbert 已提交
1416

1417
#ifdef CONFIG_SYSFS
T
Tom Herbert 已提交
1418 1419
	struct netdev_rx_queue	*_rx;

1420
	/* Number of RX queues allocated at register_netdev() time */
T
Tom Herbert 已提交
1421
	unsigned int		num_rx_queues;
1422 1423 1424

	/* Number of RX queues currently active in device */
	unsigned int		real_num_rx_queues;
1425

E
Eric Dumazet 已提交
1426
#endif
T
Tom Herbert 已提交
1427

1428 1429
	rx_handler_func_t __rcu	*rx_handler;
	void __rcu		*rx_handler_data;
1430

1431
	struct netdev_queue __rcu *ingress_queue;
1432 1433
	unsigned char		broadcast[MAX_ADDR_LEN];	/* hw bcast add	*/

E
Eric Dumazet 已提交
1434 1435 1436 1437

/*
 * Cache lines mostly used on transmit path
 */
1438
	struct netdev_queue	*_tx ____cacheline_aligned_in_smp;
1439 1440

	/* Number of TX queues allocated at alloc_netdev_mq() time  */
1441
	unsigned int		num_tx_queues;
1442 1443 1444 1445

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

1446 1447 1448
	/* root qdisc from userspace point of view */
	struct Qdisc		*qdisc;

L
Linus Torvalds 已提交
1449
	unsigned long		tx_queue_len;	/* Max frames per queue allowed */
1450
	spinlock_t		tx_global_lock;
E
Eric Dumazet 已提交
1451

T
Tom Herbert 已提交
1452
#ifdef CONFIG_XPS
E
Eric Dumazet 已提交
1453
	struct xps_dev_maps __rcu *xps_maps;
T
Tom Herbert 已提交
1454
#endif
1455 1456 1457 1458 1459 1460
#ifdef CONFIG_RFS_ACCEL
	/* CPU reverse-mapping for RX completion interrupts, indexed
	 * by RX queue number.  Assigned by driver.  This must only be
	 * set if the ndo_rx_flow_steer operation is defined. */
	struct cpu_rmap		*rx_cpu_rmap;
#endif
T
Tom Herbert 已提交
1461

1462
	/* These may be needed for future network-power-down code. */
1463 1464 1465 1466 1467

	/*
	 * trans_start here is expensive for high speed devices on SMP,
	 * please use netdev_queue->trans_start instead.
	 */
1468 1469 1470 1471 1472
	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
1473
	/* Number of references to this device */
E
Eric Dumazet 已提交
1474
	int __percpu		*pcpu_refcnt;
1475

L
Linus Torvalds 已提交
1476 1477 1478 1479 1480
	/* delayed register/unregister */
	struct list_head	todo_list;
	/* device index hash chain */
	struct hlist_node	index_hlist;

1481
	struct list_head	link_watch_list;
1482

L
Linus Torvalds 已提交
1483 1484
	/* register/unregister state machine */
	enum { NETREG_UNINITIALIZED=0,
1485
	       NETREG_REGISTERED,	/* completed register_netdevice */
L
Linus Torvalds 已提交
1486 1487 1488
	       NETREG_UNREGISTERING,	/* called unregister_netdevice */
	       NETREG_UNREGISTERED,	/* completed unregister todo */
	       NETREG_RELEASED,		/* called free_netdev */
1489
	       NETREG_DUMMY,		/* dummy device for NAPI poll */
1490 1491 1492
	} reg_state:8;

	bool dismantle; /* device is going do be freed */
1493 1494 1495 1496 1497

	enum {
		RTNL_LINK_INITIALIZED,
		RTNL_LINK_INITIALIZING,
	} rtnl_link_state:16;
L
Linus Torvalds 已提交
1498

1499 1500
	/* Called from unregister, can be used to call free_netdev */
	void (*destructor)(struct net_device *dev);
L
Linus Torvalds 已提交
1501 1502

#ifdef CONFIG_NETPOLL
1503
	struct netpoll_info __rcu	*npinfo;
L
Linus Torvalds 已提交
1504
#endif
1505

1506
#ifdef CONFIG_NET_NS
1507 1508
	/* Network namespace this network device is inside */
	struct net		*nd_net;
1509
#endif
1510

D
David S. Miller 已提交
1511
	/* mid-layer private */
E
Eric Dumazet 已提交
1512 1513 1514
	union {
		void				*ml_priv;
		struct pcpu_lstats __percpu	*lstats; /* loopback stats */
1515
		struct pcpu_sw_netstats __percpu	*tstats;
1516
		struct pcpu_dstats __percpu	*dstats; /* dummy stats */
E
Eric Dumazet 已提交
1517
		struct pcpu_vstats __percpu	*vstats; /* veth stats */
E
Eric Dumazet 已提交
1518
	};
1519
	/* GARP */
E
Eric Dumazet 已提交
1520
	struct garp_port __rcu	*garp_port;
1521 1522
	/* MRP */
	struct mrp_port __rcu	*mrp_port;
L
Linus Torvalds 已提交
1523 1524

	/* class/net/name entry */
1525
	struct device		dev;
1526 1527
	/* space for optional device, statistics, and wireless sysfs groups */
	const struct attribute_group *sysfs_groups[4];
1528 1529
	/* space for optional per-rx queue attributes */
	const struct attribute_group *sysfs_rx_queue_group;
P
Patrick McHardy 已提交
1530 1531 1532

	/* rtnetlink link ops */
	const struct rtnl_link_ops *rtnl_link_ops;
1533

1534 1535 1536
	/* for setting kernel sock attribute on TCP connection setup */
#define GSO_MAX_SIZE		65536
	unsigned int		gso_max_size;
1537 1538
#define GSO_MAX_SEGS		65535
	u16			gso_max_segs;
1539

J
Jeff Kirsher 已提交
1540
#ifdef CONFIG_DCB
1541
	/* Data Center Bridging netlink ops */
1542
	const struct dcbnl_rtnl_ops *dcbnl_ops;
1543
#endif
1544 1545 1546
	u8 num_tc;
	struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
	u8 prio_tc_map[TC_BITMASK + 1];
1547

1548
#if IS_ENABLED(CONFIG_FCOE)
1549 1550
	/* max exchange id for FCoE LRO by ddp */
	unsigned int		fcoe_ddp_xid;
1551
#endif
1552
#if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1553
	struct netprio_map __rcu *priomap;
1554
#endif
1555 1556
	/* phy device may attach itself for hardware timestamping */
	struct phy_device *phydev;
1557

1558 1559
	struct lock_class_key *qdisc_tx_busylock;

1560 1561
	/* group the device belongs to */
	int group;
1562 1563

	struct pm_qos_request	pm_qos_req;
L
Linus Torvalds 已提交
1564
};
1565
#define to_net_dev(d) container_of(d, struct net_device, dev)
L
Linus Torvalds 已提交
1566 1567 1568

#define	NETDEV_ALIGN		32

1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 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
static inline
int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
{
	return dev->prio_tc_map[prio & TC_BITMASK];
}

static inline
int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
{
	if (tc >= dev->num_tc)
		return -EINVAL;

	dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
	return 0;
}

static inline
void netdev_reset_tc(struct net_device *dev)
{
	dev->num_tc = 0;
	memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
	memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
}

static inline
int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
{
	if (tc >= dev->num_tc)
		return -EINVAL;

	dev->tc_to_txq[tc].count = count;
	dev->tc_to_txq[tc].offset = offset;
	return 0;
}

static inline
int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
{
	if (num_tc > TC_MAX_QUEUE)
		return -EINVAL;

	dev->num_tc = num_tc;
	return 0;
}

static inline
int netdev_get_num_tc(struct net_device *dev)
{
	return dev->num_tc;
}

1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638
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);
}

1639
struct netdev_queue *netdev_pick_tx(struct net_device *dev,
1640 1641
				    struct sk_buff *skb,
				    void *accel_priv);
1642

1643 1644 1645 1646 1647 1648
/*
 * Net namespace inlines
 */
static inline
struct net *dev_net(const struct net_device *dev)
{
E
Eric Dumazet 已提交
1649
	return read_pnet(&dev->nd_net);
1650 1651 1652
}

static inline
1653
void dev_net_set(struct net_device *dev, struct net *net)
1654 1655
{
#ifdef CONFIG_NET_NS
1656 1657
	release_net(dev->nd_net);
	dev->nd_net = hold_net(net);
1658 1659 1660
#endif
}

1661 1662 1663 1664 1665 1666 1667 1668 1669 1670
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;
}

1671 1672 1673 1674 1675 1676 1677 1678 1679 1680
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;
}

1681 1682 1683 1684 1685 1686
/**
 *	netdev_priv - access network device private data
 *	@dev: network device
 *
 * Get network device private data
 */
1687
static inline void *netdev_priv(const struct net_device *dev)
L
Linus Torvalds 已提交
1688
{
1689
	return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
L
Linus Torvalds 已提交
1690 1691 1692 1693 1694
}

/* Set the sysfs physical device reference for the network logical device
 * if set prior to registration will cause a symlink during initialization.
 */
1695
#define SET_NETDEV_DEV(net, pdev)	((net)->dev.parent = (pdev))
L
Linus Torvalds 已提交
1696

1697
/* Set the sysfs device type for the network logical device to allow
1698
 * fine-grained identification of different network device types. For
1699 1700 1701 1702
 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
 */
#define SET_NETDEV_DEVTYPE(net, devtype)	((net)->dev.type = (devtype))

E
Eric Dumazet 已提交
1703 1704 1705 1706 1707
/* Default NAPI poll() weight
 * Device drivers are strongly advised to not use bigger value
 */
#define NAPI_POLL_WEIGHT 64

1708 1709 1710 1711 1712 1713 1714 1715 1716 1717
/**
 *	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.
 */
1718 1719
void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
		    int (*poll)(struct napi_struct *, int), int weight);
1720

1721 1722 1723 1724 1725 1726
/**
 *  netif_napi_del - remove a napi context
 *  @napi: napi context
 *
 *  netif_napi_del() removes a napi context from the network device napi list
 */
1727 1728 1729
void netif_napi_del(struct napi_struct *napi);

struct napi_gro_cb {
1730 1731 1732
	/* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
	void *frag0;

1733 1734 1735
	/* Length of frag0. */
	unsigned int frag0_len;

1736 1737 1738
	/* This indicates where we are processing relative to skb->data. */
	int data_offset;

1739
	/* This is non-zero if the packet cannot be merged with the new skb. */
1740 1741 1742 1743
	u16	flush;

	/* Save the IP ID here and check when we get to the transport layer */
	u16	flush_id;
1744 1745

	/* Number of segments aggregated. */
1746 1747 1748 1749
	u16	count;

	/* This is non-zero if the packet may be of the same flow. */
	u8	same_flow;
H
Herbert Xu 已提交
1750 1751

	/* Free the skb? */
1752
	u8	free;
1753 1754
#define NAPI_GRO_FREE		  1
#define NAPI_GRO_FREE_STOLEN_HEAD 2
1755 1756 1757

	/* jiffies when first packet was created/queued */
	unsigned long age;
1758 1759

	/* Used in ipv6_gro_receive() */
1760 1761 1762 1763
	u16	proto;

	/* Used in udp_gro_receive */
	u16	udp_mark;
1764

1765 1766 1767
	/* used to support CHECKSUM_COMPLETE for tunneling protocols */
	__wsum	csum;

1768 1769
	/* used in skb_gro_receive() slow path */
	struct sk_buff *last;
1770 1771 1772
};

#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1773

L
Linus Torvalds 已提交
1774
struct packet_type {
D
David S. Miller 已提交
1775 1776 1777 1778 1779 1780
	__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 *);
1781 1782
	bool			(*id_match)(struct packet_type *ptype,
					    struct sock *sk);
L
Linus Torvalds 已提交
1783 1784 1785 1786
	void			*af_packet_priv;
	struct list_head	list;
};

1787
struct offload_callbacks {
1788
	struct sk_buff		*(*gso_segment)(struct sk_buff *skb,
1789
						netdev_features_t features);
1790
	int			(*gso_send_check)(struct sk_buff *skb);
1791 1792
	struct sk_buff		**(*gro_receive)(struct sk_buff **head,
					       struct sk_buff *skb);
1793
	int			(*gro_complete)(struct sk_buff *skb, int nhoff);
1794 1795 1796 1797 1798 1799
};

struct packet_offload {
	__be16			 type;	/* This is really htons(ether_type). */
	struct offload_callbacks callbacks;
	struct list_head	 list;
L
Linus Torvalds 已提交
1800 1801
};

1802 1803 1804 1805 1806
struct udp_offload {
	__be16			 port;
	struct offload_callbacks callbacks;
};

1807 1808 1809 1810 1811 1812 1813 1814 1815
/* often modified stats are per cpu, other are shared (netdev->stats) */
struct pcpu_sw_netstats {
	u64     rx_packets;
	u64     rx_bytes;
	u64     tx_packets;
	u64     tx_bytes;
	struct u64_stats_sync   syncp;
};

1816 1817
#define netdev_alloc_pcpu_stats(type)				\
({								\
1818
	typeof(type) __percpu *pcpu_stats = alloc_percpu(type); \
1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829
	if (pcpu_stats)	{					\
		int i;						\
		for_each_possible_cpu(i) {			\
			typeof(type) *stat;			\
			stat = per_cpu_ptr(pcpu_stats, i);	\
			u64_stats_init(&stat->syncp);		\
		}						\
	}							\
	pcpu_stats;						\
})

L
Linus Torvalds 已提交
1830 1831
#include <linux/notifier.h>

1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844
/* netdevice notifier chain. Please remember to update the rtnetlink
 * notification exclusion list in rtnetlink_event() when adding new
 * types.
 */
#define NETDEV_UP	0x0001	/* For now you can't veto a device up/down */
#define NETDEV_DOWN	0x0002
#define NETDEV_REBOOT	0x0003	/* Tell a protocol stack a network interface
				   detected a hardware crash and restarted
				   - we can use this eg to kick tcp sessions
				   once done */
#define NETDEV_CHANGE	0x0004	/* Notify device state change */
#define NETDEV_REGISTER 0x0005
#define NETDEV_UNREGISTER	0x0006
1845
#define NETDEV_CHANGEMTU	0x0007 /* notify after mtu change happened */
1846 1847 1848 1849 1850 1851 1852 1853 1854
#define NETDEV_CHANGEADDR	0x0008
#define NETDEV_GOING_DOWN	0x0009
#define NETDEV_CHANGENAME	0x000A
#define NETDEV_FEAT_CHANGE	0x000B
#define NETDEV_BONDING_FAILOVER 0x000C
#define NETDEV_PRE_UP		0x000D
#define NETDEV_PRE_TYPE_CHANGE	0x000E
#define NETDEV_POST_TYPE_CHANGE	0x000F
#define NETDEV_POST_INIT	0x0010
1855
#define NETDEV_UNREGISTER_FINAL 0x0011
1856 1857 1858
#define NETDEV_RELEASE		0x0012
#define NETDEV_NOTIFY_PEERS	0x0013
#define NETDEV_JOIN		0x0014
1859
#define NETDEV_CHANGEUPPER	0x0015
1860
#define NETDEV_RESEND_IGMP	0x0016
1861
#define NETDEV_PRECHANGEMTU	0x0017 /* notify before mtu change happened */
1862

1863 1864
int register_netdevice_notifier(struct notifier_block *nb);
int unregister_netdevice_notifier(struct notifier_block *nb);
1865 1866 1867 1868 1869

struct netdev_notifier_info {
	struct net_device *dev;
};

1870 1871 1872 1873 1874
struct netdev_notifier_change_info {
	struct netdev_notifier_info info; /* must be first */
	unsigned int flags_changed;
};

1875 1876 1877 1878 1879 1880
static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
					     struct net_device *dev)
{
	info->dev = dev;
}

1881 1882 1883 1884 1885 1886
static inline struct net_device *
netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
{
	return info->dev;
}

1887
int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1888 1889


L
Linus Torvalds 已提交
1890 1891
extern rwlock_t				dev_base_lock;		/* Device list lock */

1892 1893
#define for_each_netdev(net, d)		\
		list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1894 1895
#define for_each_netdev_reverse(net, d)	\
		list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1896 1897
#define for_each_netdev_rcu(net, d)		\
		list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1898 1899 1900 1901
#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)
1902 1903
#define for_each_netdev_continue_rcu(net, d)		\
	list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1904 1905 1906
#define for_each_netdev_in_bond_rcu(bond, slave)	\
		for_each_netdev_rcu(&init_net, slave)	\
			if (netdev_master_upper_dev_get_rcu(slave) == bond)
1907
#define net_device_entry(lh)	list_entry(lh, struct net_device, dev_list)
1908

1909 1910 1911 1912 1913
static inline struct net_device *next_net_device(struct net_device *dev)
{
	struct list_head *lh;
	struct net *net;

1914
	net = dev_net(dev);
1915 1916 1917 1918
	lh = dev->dev_list.next;
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

1919 1920 1921 1922 1923 1924
static inline struct net_device *next_net_device_rcu(struct net_device *dev)
{
	struct list_head *lh;
	struct net *net;

	net = dev_net(dev);
E
Eric Dumazet 已提交
1925
	lh = rcu_dereference(list_next_rcu(&dev->dev_list));
1926 1927 1928
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

1929 1930 1931 1932 1933
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);
}
1934

E
Eric Dumazet 已提交
1935 1936 1937 1938 1939 1940 1941
static inline struct net_device *first_net_device_rcu(struct net *net)
{
	struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));

	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964
int netdev_boot_setup_check(struct net_device *dev);
unsigned long netdev_boot_base(const char *prefix, int unit);
struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
				       const char *hwaddr);
struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
void dev_add_pack(struct packet_type *pt);
void dev_remove_pack(struct packet_type *pt);
void __dev_remove_pack(struct packet_type *pt);
void dev_add_offload(struct packet_offload *po);
void dev_remove_offload(struct packet_offload *po);

struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
					unsigned short mask);
struct net_device *dev_get_by_name(struct net *net, const char *name);
struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
struct net_device *__dev_get_by_name(struct net *net, const char *name);
int dev_alloc_name(struct net_device *dev, const char *name);
int dev_open(struct net_device *dev);
int dev_close(struct net_device *dev);
void dev_disable_lro(struct net_device *dev);
int dev_loopback_xmit(struct sk_buff *newskb);
int dev_queue_xmit(struct sk_buff *skb);
1965
int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv);
1966 1967 1968
int register_netdevice(struct net_device *dev);
void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
void unregister_netdevice_many(struct list_head *head);
1969 1970 1971 1972 1973
static inline void unregister_netdevice(struct net_device *dev)
{
	unregister_netdevice_queue(dev, NULL);
}

1974 1975
int netdev_refcnt_read(const struct net_device *dev);
void free_netdev(struct net_device *dev);
1976
void netdev_freemem(struct net_device *dev);
1977 1978
void synchronize_net(void);
int init_dummy_netdev(struct net_device *dev);
1979

1980 1981 1982 1983 1984 1985
struct net_device *dev_get_by_index(struct net *net, int ifindex);
struct net_device *__dev_get_by_index(struct net *net, int ifindex);
struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
int netdev_get_name(struct net *net, char *name, int ifindex);
int dev_restart(struct net_device *dev);
int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb);
1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001

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;
}

2002 2003
static inline void *skb_gro_header_fast(struct sk_buff *skb,
					unsigned int offset)
2004
{
2005 2006
	return NAPI_GRO_CB(skb)->frag0 + offset;
}
2007

2008 2009 2010 2011
static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
{
	return NAPI_GRO_CB(skb)->frag0_len < hlen;
}
2012

2013 2014 2015
static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
					unsigned int offset)
{
2016 2017 2018
	if (!pskb_may_pull(skb, hlen))
		return NULL;

2019 2020
	NAPI_GRO_CB(skb)->frag0 = NULL;
	NAPI_GRO_CB(skb)->frag0_len = 0;
2021
	return skb->data + offset;
2022
}
L
Linus Torvalds 已提交
2023

H
Herbert Xu 已提交
2024 2025
static inline void *skb_gro_network_header(struct sk_buff *skb)
{
2026 2027
	return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
	       skb_network_offset(skb);
H
Herbert Xu 已提交
2028 2029
}

2030 2031 2032 2033 2034 2035 2036 2037
static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
					const void *start, unsigned int len)
{
	if (skb->ip_summed == CHECKSUM_COMPLETE)
		NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
						  csum_partial(start, len, 0));
}

2038 2039
static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
				  unsigned short type,
2040
				  const void *daddr, const void *saddr,
2041
				  unsigned int len)
2042
{
2043
	if (!dev->header_ops || !dev->header_ops->create)
2044
		return 0;
2045 2046

	return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2047 2048
}

S
Stephen Hemminger 已提交
2049 2050 2051 2052 2053
static inline int dev_parse_header(const struct sk_buff *skb,
				   unsigned char *haddr)
{
	const struct net_device *dev = skb->dev;

2054
	if (!dev->header_ops || !dev->header_ops->parse)
S
Stephen Hemminger 已提交
2055
		return 0;
2056
	return dev->header_ops->parse(skb, haddr);
S
Stephen Hemminger 已提交
2057 2058
}

2059 2060 2061 2062 2063 2064 2065 2066 2067
static inline int dev_rebuild_header(struct sk_buff *skb)
{
	const struct net_device *dev = skb->dev;

	if (!dev->header_ops || !dev->header_ops->rebuild)
		return 0;
	return dev->header_ops->rebuild(skb);
}

L
Linus Torvalds 已提交
2068
typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
2069
int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
L
Linus Torvalds 已提交
2070 2071 2072 2073 2074
static inline int unregister_gifconf(unsigned int family)
{
	return register_gifconf(family, NULL);
}

2075
#ifdef CONFIG_NET_FLOW_LIMIT
2076
#define FLOW_LIMIT_HISTORY	(1 << 7)  /* must be ^2 and !overflow buckets */
2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087
struct sd_flow_limit {
	u64			count;
	unsigned int		num_buckets;
	unsigned int		history_head;
	u16			history[FLOW_LIMIT_HISTORY];
	u8			buckets[];
};

extern int netdev_flow_limit_table_len;
#endif /* CONFIG_NET_FLOW_LIMIT */

L
Linus Torvalds 已提交
2088
/*
E
Eric Dumazet 已提交
2089
 * Incoming packets are placed on per-cpu queues
L
Linus Torvalds 已提交
2090
 */
E
Eric Dumazet 已提交
2091
struct softnet_data {
2092
	struct Qdisc		*output_queue;
2093
	struct Qdisc		**output_queue_tailp;
L
Linus Torvalds 已提交
2094 2095
	struct list_head	poll_list;
	struct sk_buff		*completion_queue;
2096
	struct sk_buff_head	process_queue;
L
Linus Torvalds 已提交
2097

C
Changli Gao 已提交
2098
	/* stats */
2099 2100 2101 2102
	unsigned int		processed;
	unsigned int		time_squeeze;
	unsigned int		cpu_collision;
	unsigned int		received_rps;
C
Changli Gao 已提交
2103

2104
#ifdef CONFIG_RPS
E
Eric Dumazet 已提交
2105 2106 2107
	struct softnet_data	*rps_ipi_list;

	/* Elements below can be accessed between CPUs for RPS */
T
Tom Herbert 已提交
2108
	struct call_single_data	csd ____cacheline_aligned_in_smp;
E
Eric Dumazet 已提交
2109 2110
	struct softnet_data	*rps_ipi_next;
	unsigned int		cpu;
T
Tom Herbert 已提交
2111
	unsigned int		input_queue_head;
2112
	unsigned int		input_queue_tail;
2113
#endif
2114
	unsigned int		dropped;
T
Tom Herbert 已提交
2115
	struct sk_buff_head	input_pkt_queue;
2116
	struct napi_struct	backlog;
2117 2118

#ifdef CONFIG_NET_FLOW_LIMIT
2119
	struct sd_flow_limit __rcu *flow_limit;
2120
#endif
L
Linus Torvalds 已提交
2121 2122
};

2123
static inline void input_queue_head_incr(struct softnet_data *sd)
T
Tom Herbert 已提交
2124 2125
{
#ifdef CONFIG_RPS
2126 2127 2128 2129 2130 2131 2132 2133 2134
	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
2135 2136 2137
#endif
}

T
Tom Herbert 已提交
2138
DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
L
Linus Torvalds 已提交
2139

2140
void __netif_schedule(struct Qdisc *q);
L
Linus Torvalds 已提交
2141

2142
static inline void netif_schedule_queue(struct netdev_queue *txq)
L
Linus Torvalds 已提交
2143
{
2144
	if (!(txq->state & QUEUE_STATE_ANY_XOFF))
2145
		__netif_schedule(txq->qdisc);
2146 2147
}

2148 2149 2150 2151 2152 2153 2154 2155
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));
}

2156 2157
static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
{
2158
	clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2159 2160
}

2161 2162 2163 2164 2165 2166
/**
 *	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
2167 2168
static inline void netif_start_queue(struct net_device *dev)
{
2169
	netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
2170 2171
}

2172 2173 2174 2175 2176 2177 2178 2179 2180 2181
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);
	}
}

2182
static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
L
Linus Torvalds 已提交
2183
{
2184
	if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state))
2185
		__netif_schedule(dev_queue->qdisc);
2186 2187
}

2188 2189 2190 2191 2192 2193 2194
/**
 *	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.
 */
2195 2196
static inline void netif_wake_queue(struct net_device *dev)
{
2197
	netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
2198 2199
}

2200 2201 2202 2203 2204 2205 2206 2207 2208 2209
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);
	}
}

2210 2211
static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
{
2212
	if (WARN_ON(!dev_queue)) {
2213
		pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
2214 2215
		return;
	}
2216
	set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2217 2218
}

2219 2220 2221 2222 2223 2224 2225
/**
 *	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
2226 2227
static inline void netif_stop_queue(struct net_device *dev)
{
2228
	netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
2229 2230
}

2231 2232 2233 2234 2235 2236 2237 2238 2239 2240
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);
	}
}

2241
static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
2242
{
2243
	return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2244 2245
}

2246 2247 2248 2249 2250 2251
/**
 *	netif_queue_stopped - test if transmit queue is flowblocked
 *	@dev: network device
 *
 *	Test if transmit queue on device is currently unable to send.
 */
2252
static inline bool netif_queue_stopped(const struct net_device *dev)
L
Linus Torvalds 已提交
2253
{
2254
	return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
2255 2256
}

2257
static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
2258
{
2259 2260 2261
	return dev_queue->state & QUEUE_STATE_ANY_XOFF;
}

2262 2263
static inline bool
netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
2264 2265 2266 2267
{
	return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
}

2268 2269 2270 2271 2272 2273
static inline bool
netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
{
	return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
}

2274 2275 2276
static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
					unsigned int bytes)
{
T
Tom Herbert 已提交
2277 2278
#ifdef CONFIG_BQL
	dql_queued(&dev_queue->dql, bytes);
2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294

	if (likely(dql_avail(&dev_queue->dql) >= 0))
		return;

	set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);

	/*
	 * The XOFF flag must be set before checking the dql_avail below,
	 * because in netdev_tx_completed_queue we update the dql_completed
	 * before checking the XOFF flag.
	 */
	smp_mb();

	/* check again in case another CPU has just made room avail */
	if (unlikely(dql_avail(&dev_queue->dql) >= 0))
		clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
T
Tom Herbert 已提交
2295
#endif
2296 2297
}

2298 2299 2300 2301 2302 2303 2304 2305 2306
/**
 * 	netdev_sent_queue - report the number of bytes queued to hardware
 * 	@dev: network device
 * 	@bytes: number of bytes queued to the hardware device queue
 *
 * 	Report the number of bytes queued for sending/completion to the network
 * 	device hardware queue. @bytes should be a good approximation and should
 * 	exactly match netdev_completed_queue() @bytes
 */
2307 2308 2309 2310 2311 2312
static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
{
	netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
}

static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
2313
					     unsigned int pkts, unsigned int bytes)
2314
{
T
Tom Herbert 已提交
2315
#ifdef CONFIG_BQL
2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332
	if (unlikely(!bytes))
		return;

	dql_completed(&dev_queue->dql, bytes);

	/*
	 * Without the memory barrier there is a small possiblity that
	 * netdev_tx_sent_queue will miss the update and cause the queue to
	 * be stopped forever
	 */
	smp_mb();

	if (dql_avail(&dev_queue->dql) < 0)
		return;

	if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
		netif_schedule_queue(dev_queue);
T
Tom Herbert 已提交
2333
#endif
2334 2335
}

2336 2337 2338 2339 2340 2341 2342 2343 2344 2345
/**
 * 	netdev_completed_queue - report bytes and packets completed by device
 * 	@dev: network device
 * 	@pkts: actual number of packets sent over the medium
 * 	@bytes: actual number of bytes sent over the medium
 *
 * 	Report the number of bytes and packets transmitted by the network device
 * 	hardware queue over the physical medium, @bytes must exactly match the
 * 	@bytes amount passed to netdev_sent_queue()
 */
2346
static inline void netdev_completed_queue(struct net_device *dev,
2347
					  unsigned int pkts, unsigned int bytes)
2348 2349 2350 2351 2352 2353
{
	netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
}

static inline void netdev_tx_reset_queue(struct netdev_queue *q)
{
T
Tom Herbert 已提交
2354
#ifdef CONFIG_BQL
2355
	clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
T
Tom Herbert 已提交
2356 2357
	dql_reset(&q->dql);
#endif
2358 2359
}

2360 2361 2362 2363 2364 2365 2366
/**
 * 	netdev_reset_queue - reset the packets and bytes count of a network device
 * 	@dev_queue: network device
 *
 * 	Reset the bytes and packet count of a network device and clear the
 * 	software flow control OFF bit for this network device
 */
2367 2368 2369
static inline void netdev_reset_queue(struct net_device *dev_queue)
{
	netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
2370 2371
}

2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391
/**
 * 	netdev_cap_txqueue - check if selected tx queue exceeds device queues
 * 	@dev: network device
 * 	@queue_index: given tx queue index
 *
 * 	Returns 0 if given tx queue index >= number of device tx queues,
 * 	otherwise returns the originally passed tx queue index.
 */
static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
{
	if (unlikely(queue_index >= dev->real_num_tx_queues)) {
		net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
				     dev->name, queue_index,
				     dev->real_num_tx_queues);
		return 0;
	}

	return queue_index;
}

2392 2393 2394 2395 2396 2397
/**
 *	netif_running - test if up
 *	@dev: network device
 *
 *	Test if the device has been brought up.
 */
2398
static inline bool netif_running(const struct net_device *dev)
L
Linus Torvalds 已提交
2399 2400 2401 2402
{
	return test_bit(__LINK_STATE_START, &dev->state);
}

2403 2404 2405 2406 2407 2408
/*
 * 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.
 */
2409 2410 2411 2412 2413 2414 2415 2416

/**
 *	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.
 */
2417 2418
static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
{
2419
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2420 2421

	netif_tx_start_queue(txq);
2422 2423
}

2424 2425 2426 2427 2428 2429 2430
/**
 *	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.
 */
2431 2432
static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
{
2433
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2434
	netif_tx_stop_queue(txq);
2435 2436
}

2437 2438 2439 2440 2441 2442 2443
/**
 *	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.
 */
2444 2445
static inline bool __netif_subqueue_stopped(const struct net_device *dev,
					    u16 queue_index)
2446
{
2447
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2448 2449

	return netif_tx_queue_stopped(txq);
2450 2451
}

2452 2453
static inline bool netif_subqueue_stopped(const struct net_device *dev,
					  struct sk_buff *skb)
2454 2455 2456
{
	return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
}
2457 2458 2459 2460 2461 2462 2463 2464

/**
 *	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.
 */
2465 2466
static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
{
2467
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2468
	if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state))
2469
		__netif_schedule(txq->qdisc);
2470 2471
}

2472
#ifdef CONFIG_XPS
2473
int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
2474
			u16 index);
2475 2476
#else
static inline int netif_set_xps_queue(struct net_device *dev,
2477
				      const struct cpumask *mask,
2478 2479 2480 2481 2482 2483
				      u16 index)
{
	return 0;
}
#endif

2484 2485 2486 2487 2488 2489 2490 2491 2492 2493
/*
 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
 * as a distribution range limit for the returned value.
 */
static inline u16 skb_tx_hash(const struct net_device *dev,
			      const struct sk_buff *skb)
{
	return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
}

2494 2495 2496 2497 2498 2499
/**
 *	netif_is_multiqueue - test if device has multiple transmit queues
 *	@dev: network device
 *
 * Check if device has multiple transmit queues
 */
2500
static inline bool netif_is_multiqueue(const struct net_device *dev)
2501
{
E
Eric Dumazet 已提交
2502
	return dev->num_tx_queues > 1;
2503
}
L
Linus Torvalds 已提交
2504

2505
int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
2506

2507
#ifdef CONFIG_SYSFS
2508
int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
2509 2510 2511 2512 2513 2514 2515 2516
#else
static inline int netif_set_real_num_rx_queues(struct net_device *dev,
						unsigned int rxq)
{
	return 0;
}
#endif

2517 2518 2519
static inline int netif_copy_real_num_queues(struct net_device *to_dev,
					     const struct net_device *from_dev)
{
2520 2521 2522 2523 2524 2525
	int err;

	err = netif_set_real_num_tx_queues(to_dev,
					   from_dev->real_num_tx_queues);
	if (err)
		return err;
2526
#ifdef CONFIG_SYSFS
2527 2528 2529 2530 2531 2532 2533
	return netif_set_real_num_rx_queues(to_dev,
					    from_dev->real_num_rx_queues);
#else
	return 0;
#endif
}

2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545
#ifdef CONFIG_SYSFS
static inline unsigned int get_netdev_rx_queue_index(
		struct netdev_rx_queue *queue)
{
	struct net_device *dev = queue->dev;
	int index = queue - dev->_rx;

	BUG_ON(index >= dev->num_rx_queues);
	return index;
}
#endif

2546
#define DEFAULT_MAX_NUM_RSS_QUEUES	(8)
2547
int netif_get_num_default_rss_queues(void);
2548

2549 2550 2551 2552 2553 2554 2555
enum skb_free_reason {
	SKB_REASON_CONSUMED,
	SKB_REASON_DROPPED,
};

void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
L
Linus Torvalds 已提交
2556

2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574
/*
 * It is not allowed to call kfree_skb() or consume_skb() from hardware
 * interrupt context or with hardware interrupts being disabled.
 * (in_irq() || irqs_disabled())
 *
 * We provide four helpers that can be used in following contexts :
 *
 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
 *  replacing kfree_skb(skb)
 *
 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
 *  Typically used in place of consume_skb(skb) in TX completion path
 *
 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
 *  replacing kfree_skb(skb)
 *
 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
 *  and consumed a packet. Used in place of consume_skb(skb)
L
Linus Torvalds 已提交
2575
 */
2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594
static inline void dev_kfree_skb_irq(struct sk_buff *skb)
{
	__dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
}

static inline void dev_consume_skb_irq(struct sk_buff *skb)
{
	__dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
}

static inline void dev_kfree_skb_any(struct sk_buff *skb)
{
	__dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
}

static inline void dev_consume_skb_any(struct sk_buff *skb)
{
	__dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
}
L
Linus Torvalds 已提交
2595

2596 2597 2598 2599 2600 2601 2602
int netif_rx(struct sk_buff *skb);
int netif_rx_ni(struct sk_buff *skb);
int netif_receive_skb(struct sk_buff *skb);
gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
void napi_gro_flush(struct napi_struct *napi, bool flush_old);
struct sk_buff *napi_get_frags(struct napi_struct *napi);
gro_result_t napi_gro_frags(struct napi_struct *napi);
2603 2604
struct packet_offload *gro_find_receive_by_type(__be16 type);
struct packet_offload *gro_find_complete_by_type(__be16 type);
2605 2606 2607 2608 2609 2610 2611

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

2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622
int netdev_rx_handler_register(struct net_device *dev,
			       rx_handler_func_t *rx_handler,
			       void *rx_handler_data);
void netdev_rx_handler_unregister(struct net_device *dev);

bool dev_valid_name(const char *name);
int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
int dev_ethtool(struct net *net, struct ifreq *);
unsigned int dev_get_flags(const struct net_device *);
int __dev_change_flags(struct net_device *, unsigned int flags);
int dev_change_flags(struct net_device *, unsigned int);
2623 2624
void __dev_notify_flags(struct net_device *, unsigned int old_flags,
			unsigned int gchanges);
2625 2626 2627 2628 2629 2630 2631 2632 2633 2634
int dev_change_name(struct net_device *, const char *);
int dev_set_alias(struct net_device *, const char *, size_t);
int dev_change_net_namespace(struct net_device *, struct net *, const char *);
int dev_set_mtu(struct net_device *, int);
void dev_set_group(struct net_device *, int);
int dev_set_mac_address(struct net_device *, struct sockaddr *);
int dev_change_carrier(struct net_device *, bool new_carrier);
int dev_get_phys_port_id(struct net_device *dev,
			 struct netdev_phys_port_id *ppid);
int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
2635
			struct netdev_queue *txq);
2636
int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
2637
bool is_skb_forwardable(struct net_device *dev, struct sk_buff *skb);
L
Linus Torvalds 已提交
2638

2639
extern int		netdev_budget;
L
Linus Torvalds 已提交
2640 2641

/* Called by rtnetlink.c:rtnl_unlock() */
2642
void netdev_run_todo(void);
L
Linus Torvalds 已提交
2643

2644 2645 2646 2647
/**
 *	dev_put - release reference to device
 *	@dev: network device
 *
2648
 * Release reference to device to allow it to be freed.
2649
 */
L
Linus Torvalds 已提交
2650 2651
static inline void dev_put(struct net_device *dev)
{
2652
	this_cpu_dec(*dev->pcpu_refcnt);
L
Linus Torvalds 已提交
2653 2654
}

2655 2656 2657 2658
/**
 *	dev_hold - get reference to device
 *	@dev: network device
 *
2659
 * Hold reference to device to keep it from being freed.
2660
 */
2661 2662
static inline void dev_hold(struct net_device *dev)
{
2663
	this_cpu_inc(*dev->pcpu_refcnt);
2664
}
L
Linus Torvalds 已提交
2665 2666 2667 2668

/* 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
2669 2670 2671 2672
 *
 * 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
2673 2674
 */

2675 2676 2677
void linkwatch_init_dev(struct net_device *dev);
void linkwatch_fire_event(struct net_device *dev);
void linkwatch_forget_dev(struct net_device *dev);
L
Linus Torvalds 已提交
2678

2679 2680 2681 2682 2683 2684
/**
 *	netif_carrier_ok - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
2685
static inline bool netif_carrier_ok(const struct net_device *dev)
L
Linus Torvalds 已提交
2686 2687 2688 2689
{
	return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
}

2690
unsigned long dev_trans_start(struct net_device *dev);
2691

2692
void __netdev_watchdog_up(struct net_device *dev);
L
Linus Torvalds 已提交
2693

2694
void netif_carrier_on(struct net_device *dev);
L
Linus Torvalds 已提交
2695

2696
void netif_carrier_off(struct net_device *dev);
L
Linus Torvalds 已提交
2697

2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710
/**
 *	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
2711 2712 2713 2714 2715 2716
static inline void netif_dormant_on(struct net_device *dev)
{
	if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

2717 2718 2719 2720 2721 2722
/**
 *	netif_dormant_off - set device as not dormant.
 *	@dev: network device
 *
 * Device is not in dormant state.
 */
S
Stefan Rompf 已提交
2723 2724 2725 2726 2727 2728
static inline void netif_dormant_off(struct net_device *dev)
{
	if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

2729 2730 2731 2732 2733 2734
/**
 *	netif_dormant - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
2735
static inline bool netif_dormant(const struct net_device *dev)
S
Stefan Rompf 已提交
2736 2737 2738 2739 2740
{
	return test_bit(__LINK_STATE_DORMANT, &dev->state);
}


2741 2742 2743 2744 2745 2746
/**
 *	netif_oper_up - test if device is operational
 *	@dev: network device
 *
 * Check if carrier is operational
 */
2747
static inline bool netif_oper_up(const struct net_device *dev)
E
Eric Dumazet 已提交
2748
{
S
Stefan Rompf 已提交
2749 2750 2751 2752
	return (dev->operstate == IF_OPER_UP ||
		dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
}

2753 2754 2755 2756 2757 2758
/**
 *	netif_device_present - is device available or removed
 *	@dev: network device
 *
 * Check if device has not been removed from system.
 */
2759
static inline bool netif_device_present(struct net_device *dev)
L
Linus Torvalds 已提交
2760 2761 2762 2763
{
	return test_bit(__LINK_STATE_PRESENT, &dev->state);
}

2764
void netif_device_detach(struct net_device *dev);
L
Linus Torvalds 已提交
2765

2766
void netif_device_attach(struct net_device *dev);
L
Linus Torvalds 已提交
2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816

/*
 * Network interface message level settings
 */

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;
}

2817
static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
H
Herbert Xu 已提交
2818
{
2819 2820
	spin_lock(&txq->_xmit_lock);
	txq->xmit_lock_owner = cpu;
2821 2822
}

2823 2824 2825 2826 2827 2828
static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
{
	spin_lock_bh(&txq->_xmit_lock);
	txq->xmit_lock_owner = smp_processor_id();
}

2829
static inline bool __netif_tx_trylock(struct netdev_queue *txq)
2830
{
2831
	bool ok = spin_trylock(&txq->_xmit_lock);
2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848
	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
2849 2850 2851 2852 2853 2854
static inline void txq_trans_update(struct netdev_queue *txq)
{
	if (txq->xmit_lock_owner != -1)
		txq->trans_start = jiffies;
}

2855 2856 2857 2858 2859 2860
/**
 *	netif_tx_lock - grab network device transmit lock
 *	@dev: network device
 *
 * Get network device transmit lock
 */
2861 2862
static inline void netif_tx_lock(struct net_device *dev)
{
2863
	unsigned int i;
2864
	int cpu;
2865

2866 2867
	spin_lock(&dev->tx_global_lock);
	cpu = smp_processor_id();
2868 2869
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2870 2871 2872 2873 2874 2875 2876

		/* 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.
		 */
2877
		__netif_tx_lock(txq, cpu);
2878 2879
		set_bit(__QUEUE_STATE_FROZEN, &txq->state);
		__netif_tx_unlock(txq);
2880
	}
H
Herbert Xu 已提交
2881 2882 2883 2884
}

static inline void netif_tx_lock_bh(struct net_device *dev)
{
2885 2886
	local_bh_disable();
	netif_tx_lock(dev);
H
Herbert Xu 已提交
2887 2888 2889 2890
}

static inline void netif_tx_unlock(struct net_device *dev)
{
2891 2892 2893 2894
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2895

2896 2897 2898 2899 2900
		/* 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);
2901
		netif_schedule_queue(txq);
2902 2903
	}
	spin_unlock(&dev->tx_global_lock);
H
Herbert Xu 已提交
2904 2905 2906 2907
}

static inline void netif_tx_unlock_bh(struct net_device *dev)
{
2908 2909
	netif_tx_unlock(dev);
	local_bh_enable();
H
Herbert Xu 已提交
2910 2911
}

2912
#define HARD_TX_LOCK(dev, txq, cpu) {			\
2913
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
2914
		__netif_tx_lock(txq, cpu);		\
2915 2916 2917
	}						\
}

2918 2919 2920 2921 2922
#define HARD_TX_TRYLOCK(dev, txq)			\
	(((dev->features & NETIF_F_LLTX) == 0) ?	\
		__netif_tx_trylock(txq) :		\
		true )

2923
#define HARD_TX_UNLOCK(dev, txq) {			\
2924
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
2925
		__netif_tx_unlock(txq);			\
2926 2927 2928
	}						\
}

L
Linus Torvalds 已提交
2929 2930
static inline void netif_tx_disable(struct net_device *dev)
{
2931
	unsigned int i;
2932
	int cpu;
2933

2934 2935
	local_bh_disable();
	cpu = smp_processor_id();
2936 2937
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2938 2939

		__netif_tx_lock(txq, cpu);
2940
		netif_tx_stop_queue(txq);
2941
		__netif_tx_unlock(txq);
2942
	}
2943
	local_bh_enable();
L
Linus Torvalds 已提交
2944 2945
}

2946 2947 2948 2949 2950
static inline void netif_addr_lock(struct net_device *dev)
{
	spin_lock(&dev->addr_list_lock);
}

2951 2952 2953 2954 2955
static inline void netif_addr_lock_nested(struct net_device *dev)
{
	spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING);
}

2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970
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);
}

2971
/*
2972
 * dev_addrs walker. Should be used only for read access. Call with
2973 2974 2975
 * rcu_read_lock held.
 */
#define for_each_dev_addr(dev, ha) \
2976
		list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2977

L
Linus Torvalds 已提交
2978 2979
/* These functions live elsewhere (drivers/net/net_init.c, but related) */

2980
void ether_setup(struct net_device *dev);
L
Linus Torvalds 已提交
2981 2982

/* Support for loadable net-drivers */
2983 2984 2985
struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
				    void (*setup)(struct net_device *),
				    unsigned int txqs, unsigned int rxqs);
2986
#define alloc_netdev(sizeof_priv, name, setup) \
T
Tom Herbert 已提交
2987 2988 2989 2990 2991
	alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)

#define alloc_netdev_mq(sizeof_priv, name, setup, count) \
	alloc_netdev_mqs(sizeof_priv, name, setup, count, count)

2992 2993
int register_netdev(struct net_device *dev);
void unregister_netdev(struct net_device *dev);
2994

2995
/* General hardware address lists handling functions */
2996 2997 2998 2999 3000
int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
		   struct netdev_hw_addr_list *from_list, int addr_len);
void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
		      struct netdev_hw_addr_list *from_list, int addr_len);
void __hw_addr_init(struct netdev_hw_addr_list *list);
3001

3002
/* Functions used for device addresses handling */
3003 3004 3005 3006 3007 3008
int dev_addr_add(struct net_device *dev, const unsigned char *addr,
		 unsigned char addr_type);
int dev_addr_del(struct net_device *dev, const unsigned char *addr,
		 unsigned char addr_type);
void dev_addr_flush(struct net_device *dev);
int dev_addr_init(struct net_device *dev);
3009 3010

/* Functions used for unicast addresses handling */
3011 3012 3013 3014 3015 3016 3017 3018
int dev_uc_add(struct net_device *dev, const unsigned char *addr);
int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
int dev_uc_del(struct net_device *dev, const unsigned char *addr);
int dev_uc_sync(struct net_device *to, struct net_device *from);
int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
void dev_uc_unsync(struct net_device *to, struct net_device *from);
void dev_uc_flush(struct net_device *dev);
void dev_uc_init(struct net_device *dev);
3019

3020
/* Functions used for multicast addresses handling */
3021 3022 3023 3024 3025 3026 3027 3028 3029 3030
int dev_mc_add(struct net_device *dev, const unsigned char *addr);
int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
int dev_mc_del(struct net_device *dev, const unsigned char *addr);
int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
int dev_mc_sync(struct net_device *to, struct net_device *from);
int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
void dev_mc_unsync(struct net_device *to, struct net_device *from);
void dev_mc_flush(struct net_device *dev);
void dev_mc_init(struct net_device *dev);
3031

3032
/* Functions used for secondary unicast and multicast support */
3033 3034 3035 3036 3037 3038 3039
void dev_set_rx_mode(struct net_device *dev);
void __dev_set_rx_mode(struct net_device *dev);
int dev_set_promiscuity(struct net_device *dev, int inc);
int dev_set_allmulti(struct net_device *dev, int inc);
void netdev_state_change(struct net_device *dev);
void netdev_notify_peers(struct net_device *dev);
void netdev_features_change(struct net_device *dev);
L
Linus Torvalds 已提交
3040
/* Load a device via the kmod */
3041 3042 3043 3044 3045
void dev_load(struct net *net, const char *name);
struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
					struct rtnl_link_stats64 *storage);
void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
			     const struct net_device_stats *netdev_stats);
3046

L
Linus Torvalds 已提交
3047
extern int		netdev_max_backlog;
E
Eric Dumazet 已提交
3048
extern int		netdev_tstamp_prequeue;
L
Linus Torvalds 已提交
3049
extern int		weight_p;
3050
extern int		bpf_jit_enable;
J
Jiri Pirko 已提交
3051

3052 3053 3054
bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
						     struct list_head **iter);
3055 3056

/* iterate through upper list, must be called under RCU read lock */
3057 3058 3059 3060 3061
#define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \
	for (iter = &(dev)->all_adj_list.upper, \
	     updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \
	     updev; \
	     updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)))
3062

3063 3064 3065 3066
void *netdev_lower_get_next_private(struct net_device *dev,
				    struct list_head **iter);
void *netdev_lower_get_next_private_rcu(struct net_device *dev,
					struct list_head **iter);
3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079

#define netdev_for_each_lower_private(dev, priv, iter) \
	for (iter = (dev)->adj_list.lower.next, \
	     priv = netdev_lower_get_next_private(dev, &(iter)); \
	     priv; \
	     priv = netdev_lower_get_next_private(dev, &(iter)))

#define netdev_for_each_lower_private_rcu(dev, priv, iter) \
	for (iter = &(dev)->adj_list.lower, \
	     priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
	     priv; \
	     priv = netdev_lower_get_next_private_rcu(dev, &(iter)))

3080 3081 3082 3083 3084 3085 3086 3087
void *netdev_lower_get_next(struct net_device *dev,
				struct list_head **iter);
#define netdev_for_each_lower_dev(dev, ldev, iter) \
	for (iter = &(dev)->adj_list.lower, \
	     ldev = netdev_lower_get_next(dev, &(iter)); \
	     ldev; \
	     ldev = netdev_lower_get_next(dev, &(iter)))

3088
void *netdev_adjacent_get_private(struct list_head *adj_list);
3089
void *netdev_lower_get_first_private_rcu(struct net_device *dev);
3090 3091 3092 3093
struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev);
int netdev_master_upper_dev_link(struct net_device *dev,
J
Jiri Pirko 已提交
3094
				 struct net_device *upper_dev);
3095 3096 3097 3098 3099
int netdev_master_upper_dev_link_private(struct net_device *dev,
					 struct net_device *upper_dev,
					 void *private);
void netdev_upper_dev_unlink(struct net_device *dev,
			     struct net_device *upper_dev);
3100
void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
3101 3102
void *netdev_lower_dev_get_private(struct net_device *dev,
				   struct net_device *lower_dev);
3103 3104
int dev_get_nest_level(struct net_device *dev,
		       bool (*type_check)(struct net_device *dev));
3105 3106 3107 3108 3109
int skb_checksum_help(struct sk_buff *skb);
struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
				  netdev_features_t features, bool tx_path);
struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
				    netdev_features_t features);
3110 3111 3112 3113 3114 3115

static inline
struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
{
	return __skb_gso_segment(skb, features, true);
}
3116
__be16 skb_network_protocol(struct sk_buff *skb, int *depth);
3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128

static inline bool can_checksum_protocol(netdev_features_t features,
					 __be16 protocol)
{
	return ((features & NETIF_F_GEN_CSUM) ||
		((features & NETIF_F_V4_CSUM) &&
		 protocol == htons(ETH_P_IP)) ||
		((features & NETIF_F_V6_CSUM) &&
		 protocol == htons(ETH_P_IPV6)) ||
		((features & NETIF_F_FCOE_CRC) &&
		 protocol == htons(ETH_P_FCOE)));
}
3129

3130
#ifdef CONFIG_BUG
3131
void netdev_rx_csum_fault(struct net_device *dev);
3132 3133 3134 3135 3136
#else
static inline void netdev_rx_csum_fault(struct net_device *dev)
{
}
#endif
L
Linus Torvalds 已提交
3137
/* rx skb timestamps */
3138 3139
void net_enable_timestamp(void);
void net_disable_timestamp(void);
L
Linus Torvalds 已提交
3140

3141
#ifdef CONFIG_PROC_FS
3142
int __init dev_proc_init(void);
3143 3144
#else
#define dev_proc_init() 0
3145 3146
#endif

3147 3148 3149 3150
int netdev_class_create_file_ns(struct class_attribute *class_attr,
				const void *ns);
void netdev_class_remove_file_ns(struct class_attribute *class_attr,
				 const void *ns);
3151 3152 3153 3154 3155 3156 3157 3158 3159 3160

static inline int netdev_class_create_file(struct class_attribute *class_attr)
{
	return netdev_class_create_file_ns(class_attr, NULL);
}

static inline void netdev_class_remove_file(struct class_attribute *class_attr)
{
	netdev_class_remove_file_ns(class_attr, NULL);
}
3161

3162 3163
extern struct kobj_ns_type_operations net_ns_type_operations;

3164
const char *netdev_drivername(const struct net_device *dev);
3165

3166
void linkwatch_run_queue(void);
3167

3168 3169
static inline netdev_features_t netdev_get_wanted_features(
	struct net_device *dev)
3170 3171 3172
{
	return (dev->features & ~dev->hw_features) | dev->wanted_features;
}
3173 3174
netdev_features_t netdev_increment_features(netdev_features_t all,
	netdev_features_t one, netdev_features_t mask);
3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185

/* Allow TSO being used on stacked device :
 * Performing the GSO segmentation before last device
 * is a performance improvement.
 */
static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
							netdev_features_t mask)
{
	return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
}

3186
int __netdev_update_features(struct net_device *dev);
3187
void netdev_update_features(struct net_device *dev);
3188
void netdev_change_features(struct net_device *dev);
3189

3190 3191 3192
void netif_stacked_transfer_operstate(const struct net_device *rootdev,
					struct net_device *dev);

3193
netdev_features_t netif_skb_features(struct sk_buff *skb);
3194

3195
static inline bool net_gso_ok(netdev_features_t features, int gso_type)
3196
{
3197
	netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT;
3198 3199 3200 3201 3202 3203 3204 3205 3206

	/* check flags correspondence */
	BUILD_BUG_ON(SKB_GSO_TCPV4   != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_UDP     != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_DODGY   != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_TCPV6   != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_FCOE    != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));

3207
	return (features & feature) == feature;
3208 3209
}

3210
static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
3211
{
H
Herbert Xu 已提交
3212
	return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
3213
	       (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
3214 3215
}

3216 3217
static inline bool netif_needs_gso(struct sk_buff *skb,
				   netdev_features_t features)
3218
{
3219
	return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
3220 3221
		unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
			 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
3222 3223
}

3224 3225 3226 3227 3228 3229
static inline void netif_set_gso_max_size(struct net_device *dev,
					  unsigned int size)
{
	dev->gso_max_size = size;
}

3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242
static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
					int pulled_hlen, u16 mac_offset,
					int mac_len)
{
	skb->protocol = protocol;
	skb->encapsulation = 1;
	skb_push(skb, pulled_hlen);
	skb_reset_transport_header(skb);
	skb->mac_header = mac_offset;
	skb->network_header = skb->mac_header + mac_len;
	skb->mac_len = mac_len;
}

3243 3244 3245 3246 3247
static inline bool netif_is_macvlan(struct net_device *dev)
{
	return dev->priv_flags & IFF_MACVLAN;
}

3248 3249 3250 3251 3252
static inline bool netif_is_bond_master(struct net_device *dev)
{
	return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
}

3253
static inline bool netif_is_bond_slave(struct net_device *dev)
J
Jiri Pirko 已提交
3254 3255 3256 3257
{
	return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
}

3258 3259 3260 3261 3262
static inline bool netif_supports_nofcs(struct net_device *dev)
{
	return dev->priv_flags & IFF_SUPP_NOFCS;
}

3263
extern struct pernet_operations __net_initdata loopback_net_ops;
3264

3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275
/* 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;
}

3276
__printf(3, 4)
3277 3278
int netdev_printk(const char *level, const struct net_device *dev,
		  const char *format, ...);
3279
__printf(2, 3)
3280
int netdev_emerg(const struct net_device *dev, const char *format, ...);
3281
__printf(2, 3)
3282
int netdev_alert(const struct net_device *dev, const char *format, ...);
3283
__printf(2, 3)
3284
int netdev_crit(const struct net_device *dev, const char *format, ...);
3285
__printf(2, 3)
3286
int netdev_err(const struct net_device *dev, const char *format, ...);
3287
__printf(2, 3)
3288
int netdev_warn(const struct net_device *dev, const char *format, ...);
3289
__printf(2, 3)
3290
int netdev_notice(const struct net_device *dev, const char *format, ...);
3291
__printf(2, 3)
3292
int netdev_info(const struct net_device *dev, const char *format, ...);
3293

3294 3295 3296
#define MODULE_ALIAS_NETDEV(device) \
	MODULE_ALIAS("netdev-" device)

3297
#if defined(CONFIG_DYNAMIC_DEBUG)
3298 3299
#define netdev_dbg(__dev, format, args...)			\
do {								\
3300
	dynamic_netdev_dbg(__dev, format, ##args);		\
3301
} while (0)
3302 3303 3304
#elif defined(DEBUG)
#define netdev_dbg(__dev, format, args...)			\
	netdev_printk(KERN_DEBUG, __dev, format, ##args)
3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331
#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...)			\
3332
	WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args)
3333

3334 3335 3336 3337 3338 3339 3340 3341
/* 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)

3342 3343 3344 3345 3346 3347
#define netif_level(level, priv, type, dev, fmt, args...)	\
do {								\
	if (netif_msg_##type(priv))				\
		netdev_##level(dev, fmt, ##args);		\
} while (0)

3348
#define netif_emerg(priv, type, dev, fmt, args...)		\
3349
	netif_level(emerg, priv, type, dev, fmt, ##args)
3350
#define netif_alert(priv, type, dev, fmt, args...)		\
3351
	netif_level(alert, priv, type, dev, fmt, ##args)
3352
#define netif_crit(priv, type, dev, fmt, args...)		\
3353
	netif_level(crit, priv, type, dev, fmt, ##args)
3354
#define netif_err(priv, type, dev, fmt, args...)		\
3355
	netif_level(err, priv, type, dev, fmt, ##args)
3356
#define netif_warn(priv, type, dev, fmt, args...)		\
3357
	netif_level(warn, priv, type, dev, fmt, ##args)
3358
#define netif_notice(priv, type, dev, fmt, args...)		\
3359
	netif_level(notice, priv, type, dev, fmt, ##args)
3360
#define netif_info(priv, type, dev, fmt, args...)		\
3361
	netif_level(info, priv, type, dev, fmt, ##args)
3362

3363
#if defined(CONFIG_DYNAMIC_DEBUG)
3364 3365 3366
#define netif_dbg(priv, type, netdev, format, args...)		\
do {								\
	if (netif_msg_##type(priv))				\
3367
		dynamic_netdev_dbg(netdev, format, ##args);	\
3368
} while (0)
3369 3370 3371
#elif defined(DEBUG)
#define netif_dbg(priv, type, dev, format, args...)		\
	netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
3372 3373 3374 3375 3376 3377 3378 3379 3380 3381
#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)
3382
#define netif_vdbg	netif_dbg
3383 3384 3385 3386
#else
#define netif_vdbg(priv, type, dev, format, args...)		\
({								\
	if (0)							\
3387
		netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
3388 3389 3390
	0;							\
})
#endif
3391

3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421
/*
 *	The list of packet types we will receive (as opposed to discard)
 *	and the routines to invoke.
 *
 *	Why 16. Because with 16 the only overlap we get on a hash of the
 *	low nibble of the protocol value is RARP/SNAP/X.25.
 *
 *      NOTE:  That is no longer true with the addition of VLAN tags.  Not
 *             sure which should go first, but I bet it won't make much
 *             difference if we are running VLANs.  The good news is that
 *             this protocol won't be in the list unless compiled in, so
 *             the average user (w/out VLANs) will not be adversely affected.
 *             --BLG
 *
 *		0800	IP
 *		8100    802.1Q VLAN
 *		0001	802.3
 *		0002	AX.25
 *		0004	802.2
 *		8035	RARP
 *		0005	SNAP
 *		0805	X.25
 *		0806	ARP
 *		8137	IPX
 *		0009	Localtalk
 *		86DD	IPv6
 */
#define PTYPE_HASH_SIZE	(16)
#define PTYPE_HASH_MASK	(PTYPE_HASH_SIZE - 1)

3422
#endif	/* _LINUX_NETDEVICE_H */