netdevice.h 83.6 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 28 29 30
 *		Bjorn Ekwall. <bj0rn@blox.se>
 *              Pekka Riikonen <priikone@poseidon.pspt.fi>
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 *		Moved to /usr/include/linux for NET3
 */
#ifndef _LINUX_NETDEVICE_H
#define _LINUX_NETDEVICE_H

#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/if_packet.h>
31
#include <linux/if_link.h>
L
Linus Torvalds 已提交
32 33

#ifdef __KERNEL__
34
#include <linux/pm_qos.h>
A
Al Viro 已提交
35
#include <linux/timer.h>
36
#include <linux/delay.h>
A
Arun Sharma 已提交
37
#include <linux/atomic.h>
L
Linus Torvalds 已提交
38 39 40 41 42
#include <asm/cache.h>
#include <asm/byteorder.h>

#include <linux/device.h>
#include <linux/percpu.h>
43
#include <linux/rculist.h>
44
#include <linux/dmaengine.h>
45
#include <linux/workqueue.h>
L
Linus Torvalds 已提交
46

47
#include <linux/ethtool.h>
48
#include <net/net_namespace.h>
49
#include <net/dsa.h>
J
Jeff Kirsher 已提交
50
#ifdef CONFIG_DCB
51 52
#include <net/dcbnl.h>
#endif
53

L
Linus Torvalds 已提交
54
struct vlan_group;
55
struct netpoll_info;
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 65 66 67
/* hardware address assignment types */
#define NET_ADDR_PERM		0	/* address is permanent (default) */
#define NET_ADDR_RANDOM		1	/* address is generated randomly */
#define NET_ADDR_STOLEN		2	/* address is stolen from other device */

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

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

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

96 97 98
/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
 * indicates that the device will soon be dropping packets, or already drops
 * some packets of the same priority; prompting us to send less aggressively. */
99
#define net_xmit_eval(e)	((e) == NET_XMIT_CN ? 0 : (e))
L
Linus Torvalds 已提交
100 101
#define net_xmit_errno(e)	((e) != NET_XMIT_CN ? -ENOBUFS : 0)

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

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

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

	return false;
}

L
Linus Torvalds 已提交
131 132 133 134
#endif

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

135 136 137
/* Initial net device group. All devices belong to group 0 by default. */
#define INIT_NETDEV_GROUP	0

138
#ifdef  __KERNEL__
L
Linus Torvalds 已提交
139 140 141 142
/*
 *	Compute the worst case header length according to the protocols
 *	used.
 */
G
Graf Yang 已提交
143

144
#if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
145 146 147 148 149
# if defined(CONFIG_MAC80211_MESH)
#  define LL_MAX_HEADER 128
# else
#  define LL_MAX_HEADER 96
# endif
150
#elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
151
# define LL_MAX_HEADER 48
L
Linus Torvalds 已提交
152
#else
153
# define LL_MAX_HEADER 32
L
Linus Torvalds 已提交
154 155
#endif

D
David S. Miller 已提交
156 157 158 159
#if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
    !defined(CONFIG_NET_IPGRE) &&  !defined(CONFIG_NET_IPGRE_MODULE) && \
    !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
    !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
L
Linus Torvalds 已提交
160 161 162 163 164 165
#define MAX_HEADER LL_MAX_HEADER
#else
#define MAX_HEADER (LL_MAX_HEADER + 48)
#endif

/*
166 167
 *	Old network device statistics. Fields are native words
 *	(unsigned long) so they can be read and written atomically.
L
Linus Torvalds 已提交
168
 */
G
Graf Yang 已提交
169

E
Eric Dumazet 已提交
170
struct net_device_stats {
171 172 173 174 175 176 177 178 179
	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
180 181
	unsigned long	collisions;
	unsigned long	rx_length_errors;
182 183 184 185 186
	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
187 188 189 190 191 192 193 194 195
	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;
};

196 197
#endif  /*  __KERNEL__  */

L
Linus Torvalds 已提交
198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218

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

#ifdef __KERNEL__

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

struct neighbour;
struct neigh_parms;
struct sk_buff;

219 220 221 222
struct netdev_hw_addr {
	struct list_head	list;
	unsigned char		addr[MAX_ADDR_LEN];
	unsigned char		type;
J
Jiri Pirko 已提交
223 224 225 226
#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
227
#define NETDEV_HW_ADDR_T_MULTICAST	5
J
Jiri Pirko 已提交
228
	bool			synced;
229
	bool			global_use;
230
	int			refcount;
231 232 233
	struct rcu_head		rcu_head;
};

234 235 236 237 238
struct netdev_hw_addr_list {
	struct list_head	list;
	int			count;
};

239 240 241 242
#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)
243

244 245 246 247
#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)
248

249 250
#define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
#define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
251
#define netdev_for_each_mc_addr(ha, dev) \
252
	netdev_hw_addr_list_for_each(ha, &(dev)->mc)
253

E
Eric Dumazet 已提交
254
struct hh_cache {
255
	u16		hh_len;
256
	u16		__pad;
257
	seqlock_t	hh_lock;
L
Linus Torvalds 已提交
258 259 260 261

	/* cached hardware header; allow for machine alignment needs.        */
#define HH_DATA_MOD	16
#define HH_DATA_OFF(__len) \
J
Jiri Benc 已提交
262
	(HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
L
Linus Torvalds 已提交
263 264 265 266 267 268 269 270 271 272 273 274
#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.
275 276 277
 *
 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
 * may need.
L
Linus Torvalds 已提交
278 279
 */
#define LL_RESERVED_SPACE(dev) \
280
	((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
L
Linus Torvalds 已提交
281
#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
282 283 284
	((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
#define LL_ALLOCATED_SPACE(dev) \
	((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
L
Linus Torvalds 已提交
285

286 287 288 289 290 291
struct header_ops {
	int	(*create) (struct sk_buff *skb, struct net_device *dev,
			   unsigned short type, const void *daddr,
			   const void *saddr, unsigned len);
	int	(*parse)(const struct sk_buff *skb, unsigned char *haddr);
	int	(*rebuild)(struct sk_buff *skb);
292
	int	(*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
293 294 295 296 297
	void	(*cache_update)(struct hh_cache *hh,
				const struct net_device *dev,
				const unsigned char *haddr);
};

L
Linus Torvalds 已提交
298 299 300 301 302
/* 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
303
enum netdev_state_t {
L
Linus Torvalds 已提交
304 305 306
	__LINK_STATE_START,
	__LINK_STATE_PRESENT,
	__LINK_STATE_NOCARRIER,
S
Stefan Rompf 已提交
307 308
	__LINK_STATE_LINKWATCH_PENDING,
	__LINK_STATE_DORMANT,
L
Linus Torvalds 已提交
309 310 311 312 313
};


/*
 * This structure holds at boot time configured netdevice settings. They
G
Graf Yang 已提交
314
 * are then used in the device probing.
L
Linus Torvalds 已提交
315 316 317 318 319 320 321
 */
struct netdev_boot_setup {
	char name[IFNAMSIZ];
	struct ifmap map;
};
#define NETDEV_BOOT_SETUP_MAX 8

322
extern int __init netdev_boot_setup(char *str);
L
Linus Torvalds 已提交
323

324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342
/*
 * Structure for NAPI scheduling similar to tasklet but with weighting
 */
struct napi_struct {
	/* The poll_list must only be managed by the entity which
	 * changes the state of the NAPI_STATE_SCHED bit.  This means
	 * whoever atomically sets that bit can add this napi_struct
	 * to the per-cpu poll_list, and whoever clears that bit
	 * can remove from the list right before clearing the bit.
	 */
	struct list_head	poll_list;

	unsigned long		state;
	int			weight;
	int			(*poll)(struct napi_struct *, int);
#ifdef CONFIG_NETPOLL
	spinlock_t		poll_lock;
	int			poll_owner;
#endif
343 344 345

	unsigned int		gro_count;

H
Herbert Xu 已提交
346
	struct net_device	*dev;
347 348
	struct list_head	dev_list;
	struct sk_buff		*gro_list;
H
Herbert Xu 已提交
349
	struct sk_buff		*skb;
350 351
};

E
Eric Dumazet 已提交
352
enum {
353
	NAPI_STATE_SCHED,	/* Poll is scheduled */
D
David S. Miller 已提交
354
	NAPI_STATE_DISABLE,	/* Disable pending */
355
	NAPI_STATE_NPSVC,	/* Netpoll - don't dequeue from poll_list */
356 357
};

358
enum gro_result {
359 360 361 362 363 364
	GRO_MERGED,
	GRO_MERGED_FREE,
	GRO_HELD,
	GRO_NORMAL,
	GRO_DROP,
};
365
typedef enum gro_result gro_result_t;
366

367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415
/*
 * 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
 * are registred on exact device (ptype->dev == skb->dev).
 *
 * 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);
416

417
extern void __napi_schedule(struct napi_struct *n);
418

D
David S. Miller 已提交
419 420 421 422 423
static inline int napi_disable_pending(struct napi_struct *n)
{
	return test_bit(NAPI_STATE_DISABLE, &n->state);
}

424 425 426 427 428 429
/**
 *	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
430 431
 * insure only one NAPI poll instance runs.  We also make
 * sure there is no pending NAPI disable.
432 433 434
 */
static inline int napi_schedule_prep(struct napi_struct *n)
{
D
David S. Miller 已提交
435 436
	return !napi_disable_pending(n) &&
		!test_and_set_bit(NAPI_STATE_SCHED, &n->state);
437 438 439 440 441 442 443 444 445 446 447 448 449 450 451
}

/**
 *	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);
}

452 453 454 455 456 457 458 459 460 461
/* Try to reschedule poll. Called by dev->poll() after napi_complete().  */
static inline int napi_reschedule(struct napi_struct *napi)
{
	if (napi_schedule_prep(napi)) {
		__napi_schedule(napi);
		return 1;
	}
	return 0;
}

462 463 464 465 466 467
/**
 *	napi_complete - NAPI processing complete
 *	@n: napi context
 *
 * Mark NAPI processing as complete.
 */
468 469
extern void __napi_complete(struct napi_struct *n);
extern void napi_complete(struct napi_struct *n);
470 471 472 473 474 475 476 477 478 479

/**
 *	napi_disable - prevent NAPI from scheduling
 *	@n: napi context
 *
 * Stop NAPI from being scheduled on this context.
 * Waits till any outstanding processing completes.
 */
static inline void napi_disable(struct napi_struct *n)
{
D
David S. Miller 已提交
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
	__QUEUE_STATE_XOFF,
520
	__QUEUE_STATE_FROZEN,
521 522
#define QUEUE_STATE_XOFF_OR_FROZEN ((1 << __QUEUE_STATE_XOFF)		| \
				    (1 << __QUEUE_STATE_FROZEN))
523 524
};

525
struct netdev_queue {
526 527 528
/*
 * read mostly part
 */
529
	struct net_device	*dev;
530
	struct Qdisc		*qdisc;
531
	unsigned long		state;
532
	struct Qdisc		*qdisc_sleeping;
533
#if defined(CONFIG_RPS) || defined(CONFIG_XPS)
T
Tom Herbert 已提交
534 535
	struct kobject		kobj;
#endif
536 537 538
#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
	int			numa_node;
#endif
539 540 541 542 543
/*
 * write mostly part
 */
	spinlock_t		_xmit_lock ____cacheline_aligned_in_smp;
	int			xmit_lock_owner;
544 545 546 547
	/*
	 * please use this field instead of dev->trans_start
	 */
	unsigned long		trans_start;
548
} ____cacheline_aligned_in_smp;
549

550 551 552 553 554
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
555
	return NUMA_NO_NODE;
556 557 558 559 560 561 562 563 564 565
#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
566
#ifdef CONFIG_RPS
T
Tom Herbert 已提交
567 568 569 570 571 572 573 574 575 576 577
/*
 * This structure holds an RPS map which can be of variable length.  The
 * map is an array of CPUs.
 */
struct rps_map {
	unsigned int len;
	struct rcu_head rcu;
	u16 cpus[0];
};
#define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))

T
Tom Herbert 已提交
578
/*
579 580 581
 * 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
582 583 584
 */
struct rps_dev_flow {
	u16 cpu;
585
	u16 filter;
T
Tom Herbert 已提交
586 587
	unsigned int last_qtail;
};
588
#define RPS_NO_FILTER 0xffff
T
Tom Herbert 已提交
589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635

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

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

#define RPS_NO_CPU 0xffff

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

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

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

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

E
Eric Dumazet 已提交
636
extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
T
Tom Herbert 已提交
637

638 639 640 641 642
#ifdef CONFIG_RFS_ACCEL
extern bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index,
				u32 flow_id, u16 filter_id);
#endif

T
Tom Herbert 已提交
643 644
/* This structure contains an instance of an RX queue. */
struct netdev_rx_queue {
E
Eric Dumazet 已提交
645 646 647
	struct rps_map __rcu		*rps_map;
	struct rps_dev_flow_table __rcu	*rps_flow_table;
	struct kobject			kobj;
T
Tom Herbert 已提交
648
	struct net_device		*dev;
T
Tom Herbert 已提交
649
} ____cacheline_aligned_in_smp;
T
Tom Herbert 已提交
650
#endif /* CONFIG_RPS */
651

T
Tom Herbert 已提交
652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671
#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];
};
#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + (_num * sizeof(u16)))
#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
672
	struct xps_map __rcu *cpu_map[0];
T
Tom Herbert 已提交
673 674 675 676 677
};
#define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) +		\
    (nr_cpu_ids * sizeof(struct xps_map *)))
#endif /* CONFIG_XPS */

678 679 680 681 682 683 684 685
#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;
};

686 687
/*
 * This structure defines the management hooks for network devices.
688 689
 * The following hooks can be defined; unless noted otherwise, they are
 * optional and can be filled with a null pointer.
690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708
 *
 * 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.
 *
709 710
 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
 *                               struct net_device *dev);
711
 *	Called when a packet needs to be transmitted.
712 713
 *	Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
 *        (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
714 715 716 717 718 719
 *	Required can not be NULL.
 *
 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
 *	Called to decide which queue to when device supports multiple
 *	transmit queues.
 *
720 721 722 723 724 725
 * 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.
726 727
 *	If driver handles unicast address filtering, it should set
 *	IFF_UNICAST_FLT to its priv_flags.
728 729 730
 *
 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
 *	This function  is called when the Media Access Control address
731
 *	needs to be changed. If this interface is not defined, the
732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751
 *	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.
 *
752
 * void (*ndo_tx_timeout)(struct net_device *dev);
753 754 755
 *	Callback uses when the transmitter has not made any progress
 *	for dev->watchdog ticks.
 *
756
 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
757
 *                      struct rtnl_link_stats64 *storage);
758
 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
759
 *	Called when a user wants to get the network device usage
760
 *	statistics. Drivers must do one of the following:
761 762
 *	1. Define @ndo_get_stats64 to fill in a zero-initialised
 *	   rtnl_link_stats64 structure passed by the caller.
763
 *	2. Define @ndo_get_stats to update a net_device_stats structure
764 765 766 767 768
 *	   (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.
769 770 771 772 773 774 775 776 777 778
 *
 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
 *	If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
 *	this function is called when a VLAN id is registered.
 *
 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
 *	If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
 *	this function is called when a VLAN id is unregistered.
 *
 * void (*ndo_poll_controller)(struct net_device *dev);
779 780 781 782 783
 *
 *	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);
784
 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
785 786
 * int (*ndo_get_vf_config)(struct net_device *dev,
 *			    int vf, struct ifla_vf_info *ivf);
787 788 789
 * 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);
790 791 792 793 794
 * 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.
795
 *
796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831
 *	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.
 *
 * 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.
 *
832 833 834 835 836 837
 *	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.
838 839 840 841 842 843 844 845
 *
 *	Slave management functions (for bridge, bonding, etc). User should
 *	call netdev_set_master() to set dev->master properly.
 * 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.
846 847 848 849 850 851 852 853 854 855 856 857
 *
 *      Feature/offload setting functions.
 * u32 (*ndo_fix_features)(struct net_device *dev, u32 features);
 *	Adjusts the requested feature flags according to device-specific
 *	constraints, and returns the resulting flags. Must not modify
 *	the device state.
 *
 * int (*ndo_set_features)(struct net_device *dev, u32 features);
 *	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.
 *
858 859 860 861 862 863
 */
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);
864
	netdev_tx_t		(*ndo_start_xmit) (struct sk_buff *skb,
865 866 867
						   struct net_device *dev);
	u16			(*ndo_select_queue)(struct net_device *dev,
						    struct sk_buff *skb);
868 869 870 871 872 873 874 875 876 877
	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);
878 879 880 881
	int			(*ndo_change_mtu)(struct net_device *dev,
						  int new_mtu);
	int			(*ndo_neigh_setup)(struct net_device *dev,
						   struct neigh_parms *);
882 883
	void			(*ndo_tx_timeout) (struct net_device *dev);

884 885
	struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
						     struct rtnl_link_stats64 *storage);
886 887 888 889 890 891 892 893
	struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);

	void			(*ndo_vlan_rx_add_vid)(struct net_device *dev,
						       unsigned short vid);
	void			(*ndo_vlan_rx_kill_vid)(struct net_device *dev,
						        unsigned short vid);
#ifdef CONFIG_NET_POLL_CONTROLLER
	void                    (*ndo_poll_controller)(struct net_device *dev);
H
Herbert Xu 已提交
894 895
	int			(*ndo_netpoll_setup)(struct net_device *dev,
						     struct netpoll_info *info);
896
	void			(*ndo_netpoll_cleanup)(struct net_device *dev);
897
#endif
898 899 900 901 902 903
	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);
904 905
	int			(*ndo_set_vf_spoofchk)(struct net_device *dev,
						       int vf, bool setting);
906 907 908
	int			(*ndo_get_vf_config)(struct net_device *dev,
						     int vf,
						     struct ifla_vf_info *ivf);
909 910 911 912 913
	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);
914
	int			(*ndo_setup_tc)(struct net_device *dev, u8 tc);
915
#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
916 917
	int			(*ndo_fcoe_enable)(struct net_device *dev);
	int			(*ndo_fcoe_disable)(struct net_device *dev);
918 919 920 921 922 923
	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);
924 925 926 927
	int			(*ndo_fcoe_ddp_target)(struct net_device *dev,
						       u16 xid,
						       struct scatterlist *sgl,
						       unsigned int sgc);
928 929 930
#endif

#if defined(CONFIG_LIBFCOE) || defined(CONFIG_LIBFCOE_MODULE)
931 932 933 934
#define NETDEV_FCOE_WWNN 0
#define NETDEV_FCOE_WWPN 1
	int			(*ndo_fcoe_get_wwn)(struct net_device *dev,
						    u64 *wwn, int type);
935
#endif
936

937 938 939 940 941 942
#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
943 944 945 946
	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);
947 948 949 950
	u32			(*ndo_fix_features)(struct net_device *dev,
						    u32 features);
	int			(*ndo_set_features)(struct net_device *dev,
						    u32 features);
951 952
};

L
Linus Torvalds 已提交
953 954 955 956 957 958 959 960 961 962
/*
 *	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
963
struct net_device {
L
Linus Torvalds 已提交
964 965 966 967

	/*
	 * 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
968
	 * of the interface.
L
Linus Torvalds 已提交
969 970
	 */
	char			name[IFNAMSIZ];
M
Mark Gross 已提交
971

J
Jean Pihet 已提交
972
	struct pm_qos_request	pm_qos_req;
M
Mark Gross 已提交
973

974 975
	/* device name hash chain */
	struct hlist_node	name_hlist;
976 977
	/* snmp alias */
	char 			*ifalias;
L
Linus Torvalds 已提交
978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994

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

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

	unsigned long		state;

995
	struct list_head	dev_list;
996
	struct list_head	napi_list;
997
	struct list_head	unreg_list;
L
Linus Torvalds 已提交
998

999
	/* currently active device features */
1000
	u32			features;
1001 1002 1003 1004
	/* user-changeable features */
	u32			hw_features;
	/* user-requested features */
	u32			wanted_features;
1005
	/* mask of features inheritable by VLAN devices */
1006 1007
	u32			vlan_features;

1008 1009 1010
	/* Net device feature bits; if you change something,
	 * also update netdev_features_strings[] in ethtool.c */

1011
#define NETIF_F_SG		1	/* Scatter/gather IO. */
1012
#define NETIF_F_IP_CSUM		2	/* Can checksum TCP/UDP over IPv4. */
1013 1014
#define NETIF_F_NO_CSUM		4	/* Does not require checksum. F.e. loopack. */
#define NETIF_F_HW_CSUM		8	/* Can checksum all the packets. */
1015
#define NETIF_F_IPV6_CSUM	16	/* Can checksum TCP/UDP over IPV6 */
1016 1017 1018 1019 1020 1021
#define NETIF_F_HIGHDMA		32	/* Can DMA to high memory. */
#define NETIF_F_FRAGLIST	64	/* Scatter/gather IO. */
#define NETIF_F_HW_VLAN_TX	128	/* Transmit VLAN hw acceleration */
#define NETIF_F_HW_VLAN_RX	256	/* Receive VLAN hw acceleration */
#define NETIF_F_HW_VLAN_FILTER	512	/* Receive filtering on VLAN */
#define NETIF_F_VLAN_CHALLENGED	1024	/* Device cannot handle VLAN packets */
H
Herbert Xu 已提交
1022
#define NETIF_F_GSO		2048	/* Enable software GSO. */
1023 1024
#define NETIF_F_LLTX		4096	/* LockLess TX - deprecated. Please */
					/* do not use LLTX in new drivers */
1025
#define NETIF_F_NETNS_LOCAL	8192	/* Does not change network namespaces */
1026
#define NETIF_F_GRO		16384	/* Generic receive offload */
1027
#define NETIF_F_LRO		32768	/* large receive offload */
1028

1029
/* the GSO_MASK reserves bits 16 through 23 */
1030
#define NETIF_F_FCOE_CRC	(1 << 24) /* FCoE CRC32 */
1031
#define NETIF_F_SCTP_CSUM	(1 << 25) /* SCTP checksum offload */
1032
#define NETIF_F_FCOE_MTU	(1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
1033
#define NETIF_F_NTUPLE		(1 << 27) /* N-tuple filters supported */
S
stephen hemminger 已提交
1034
#define NETIF_F_RXHASH		(1 << 28) /* Receive hashing offload */
1035
#define NETIF_F_RXCSUM		(1 << 29) /* Receive checksumming offload */
1036
#define NETIF_F_NOCACHE_COPY	(1 << 30) /* Use no-cache copyfromuser */
1037
#define NETIF_F_LOOPBACK	(1 << 31) /* Enable loopback */
1038

1039
	/* Segmentation offload features */
1040
#define NETIF_F_GSO_SHIFT	16
1041
#define NETIF_F_GSO_MASK	0x00ff0000
1042
#define NETIF_F_TSO		(SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
H
Herbert Xu 已提交
1043
#define NETIF_F_UFO		(SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
1044
#define NETIF_F_GSO_ROBUST	(SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
H
Herbert Xu 已提交
1045 1046
#define NETIF_F_TSO_ECN		(SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
#define NETIF_F_TSO6		(SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
1047
#define NETIF_F_FSO		(SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
1048

1049 1050
	/* Features valid for ethtool to change */
	/* = all defined minus driver/device-class-related */
1051
#define NETIF_F_NEVER_CHANGE	(NETIF_F_VLAN_CHALLENGED | \
1052
				  NETIF_F_LLTX | NETIF_F_NETNS_LOCAL)
1053
#define NETIF_F_ETHTOOL_BITS	(0xff3fffff & ~NETIF_F_NEVER_CHANGE)
1054

1055
	/* List of features with software fallbacks. */
1056 1057
#define NETIF_F_GSO_SOFTWARE	(NETIF_F_TSO | NETIF_F_TSO_ECN | \
				 NETIF_F_TSO6 | NETIF_F_UFO)
1058

1059

1060
#define NETIF_F_GEN_CSUM	(NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
1061 1062 1063
#define NETIF_F_V4_CSUM		(NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
#define NETIF_F_V6_CSUM		(NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
#define NETIF_F_ALL_CSUM	(NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
1064

1065 1066
#define NETIF_F_ALL_TSO 	(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)

Y
Yi Zou 已提交
1067 1068 1069
#define NETIF_F_ALL_FCOE	(NETIF_F_FCOE_CRC | NETIF_F_FCOE_MTU | \
				 NETIF_F_FSO)

1070 1071 1072 1073 1074
	/*
	 * If one device supports one of these features, then enable them
	 * for all in netdev_increment_features.
	 */
#define NETIF_F_ONE_FOR_ALL	(NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
1075
				 NETIF_F_SG | NETIF_F_HIGHDMA |		\
1076 1077 1078 1079 1080 1081
				 NETIF_F_FRAGLIST | NETIF_F_VLAN_CHALLENGED)
	/*
	 * If one device doesn't support one of these features, then disable it
	 * for all in netdev_increment_features.
	 */
#define NETIF_F_ALL_FOR_ALL	(NETIF_F_NOCACHE_COPY | NETIF_F_FSO)
1082

1083 1084 1085
	/* changeable features with no special hardware requirements */
#define NETIF_F_SOFT_FEATURES	(NETIF_F_GSO | NETIF_F_GRO)

L
Linus Torvalds 已提交
1086 1087 1088 1089
	/* Interface index. Unique device identifier	*/
	int			ifindex;
	int			iflink;

R
Rusty Russell 已提交
1090
	struct net_device_stats	stats;
1091 1092 1093
	atomic_long_t		rx_dropped; /* dropped packets by core network
					     * Do not use this in drivers.
					     */
L
Linus Torvalds 已提交
1094

1095
#ifdef CONFIG_WIRELESS_EXT
L
Linus Torvalds 已提交
1096 1097 1098 1099 1100
	/* 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;
1101
#endif
1102 1103
	/* Management operations */
	const struct net_device_ops *netdev_ops;
1104
	const struct ethtool_ops *ethtool_ops;
L
Linus Torvalds 已提交
1105

1106 1107 1108
	/* Hardware header description */
	const struct header_ops *header_ops;

S
Stefan Rompf 已提交
1109
	unsigned int		flags;	/* interface flags (a la BSD)	*/
1110
	unsigned int		priv_flags; /* Like 'flags' but invisible to userspace. */
L
Linus Torvalds 已提交
1111 1112 1113
	unsigned short		gflags;
	unsigned short		padded;	/* How much padding added by alloc_netdev() */

S
Stefan Rompf 已提交
1114 1115 1116
	unsigned char		operstate; /* RFC2863 operstate */
	unsigned char		link_mode; /* mapping policy to operstate */

1117 1118 1119
	unsigned char		if_port;	/* Selectable AUI, TP,..*/
	unsigned char		dma;		/* DMA channel		*/

1120
	unsigned int		mtu;	/* interface MTU value		*/
L
Linus Torvalds 已提交
1121 1122 1123
	unsigned short		type;	/* interface hardware type	*/
	unsigned short		hard_header_len;	/* hardware hdr length	*/

1124 1125 1126 1127 1128 1129 1130
	/* 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
1131
	/* Interface address info. */
1132
	unsigned char		perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1133
	unsigned char		addr_assign_type; /* hw address assignment type */
L
Linus Torvalds 已提交
1134 1135 1136
	unsigned char		addr_len;	/* hardware address length	*/
	unsigned short          dev_id;		/* for shared network cards */

J
Jiri Pirko 已提交
1137
	spinlock_t		addr_list_lock;
1138 1139
	struct netdev_hw_addr_list	uc;	/* Unicast mac addresses */
	struct netdev_hw_addr_list	mc;	/* Multicast mac addresses */
1140
	bool			uc_promisc;
1141 1142
	unsigned int		promiscuity;
	unsigned int		allmulti;
L
Linus Torvalds 已提交
1143 1144 1145


	/* Protocol specific pointers */
1146 1147

#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
E
Eric Dumazet 已提交
1148
	struct vlan_group __rcu	*vlgrp;		/* VLAN group */
1149
#endif
1150 1151 1152
#ifdef CONFIG_NET_DSA
	void			*dsa_ptr;	/* dsa specific data */
#endif
L
Linus Torvalds 已提交
1153
	void 			*atalk_ptr;	/* AppleTalk link 	*/
E
Eric Dumazet 已提交
1154
	struct in_device __rcu	*ip_ptr;	/* IPv4 specific data	*/
1155
	struct dn_dev __rcu     *dn_ptr;        /* DECnet specific data */
E
Eric Dumazet 已提交
1156
	struct inet6_dev __rcu	*ip6_ptr;       /* IPv6 specific data */
L
Linus Torvalds 已提交
1157 1158
	void			*ec_ptr;	/* Econet specific data	*/
	void			*ax25_ptr;	/* AX.25 specific data */
1159 1160
	struct wireless_dev	*ieee80211_ptr;	/* IEEE 802.11 specific data,
						   assign before registering */
L
Linus Torvalds 已提交
1161

1162
/*
E
Eric Dumazet 已提交
1163
 * Cache lines mostly used on receive path (including eth_type_trans())
1164
 */
1165 1166 1167 1168 1169 1170 1171 1172
	unsigned long		last_rx;	/* Time of last Rx
						 * This should not be set in
						 * drivers, unless really needed,
						 * because network stack (bonding)
						 * use it if/when necessary, to
						 * avoid dirtying this cache line.
						 */

E
Eric Dumazet 已提交
1173 1174 1175 1176
	struct net_device	*master; /* Pointer to master device of a group,
					  * which this device is member of.
					  */

1177
	/* Interface address info used in eth_type_trans() */
1178 1179 1180 1181
	unsigned char		*dev_addr;	/* hw address, (before bcast
						   because most packets are
						   unicast) */

1182 1183
	struct netdev_hw_addr_list	dev_addrs; /* list of device
						      hw addresses */
1184 1185

	unsigned char		broadcast[MAX_ADDR_LEN];	/* hw bcast add	*/
L
Linus Torvalds 已提交
1186

1187
#if defined(CONFIG_RPS) || defined(CONFIG_XPS)
T
Tom Herbert 已提交
1188 1189 1190 1191
	struct kset		*queues_kset;

	struct netdev_rx_queue	*_rx;

1192
	/* Number of RX queues allocated at register_netdev() time */
T
Tom Herbert 已提交
1193
	unsigned int		num_rx_queues;
1194 1195 1196

	/* Number of RX queues currently active in device */
	unsigned int		real_num_rx_queues;
1197 1198 1199 1200 1201 1202 1203

#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
E
Eric Dumazet 已提交
1204
#endif
T
Tom Herbert 已提交
1205

1206 1207
	rx_handler_func_t __rcu	*rx_handler;
	void __rcu		*rx_handler_data;
1208

1209
	struct netdev_queue __rcu *ingress_queue;
E
Eric Dumazet 已提交
1210 1211 1212 1213

/*
 * Cache lines mostly used on transmit path
 */
1214
	struct netdev_queue	*_tx ____cacheline_aligned_in_smp;
1215 1216

	/* Number of TX queues allocated at alloc_netdev_mq() time  */
1217
	unsigned int		num_tx_queues;
1218 1219 1220 1221

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

1222 1223 1224
	/* root qdisc from userspace point of view */
	struct Qdisc		*qdisc;

L
Linus Torvalds 已提交
1225
	unsigned long		tx_queue_len;	/* Max frames per queue allowed */
1226
	spinlock_t		tx_global_lock;
E
Eric Dumazet 已提交
1227

T
Tom Herbert 已提交
1228
#ifdef CONFIG_XPS
E
Eric Dumazet 已提交
1229
	struct xps_dev_maps __rcu *xps_maps;
T
Tom Herbert 已提交
1230
#endif
T
Tom Herbert 已提交
1231

1232
	/* These may be needed for future network-power-down code. */
1233 1234 1235 1236 1237

	/*
	 * trans_start here is expensive for high speed devices on SMP,
	 * please use netdev_queue->trans_start instead.
	 */
1238 1239 1240 1241 1242
	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
1243
	/* Number of references to this device */
E
Eric Dumazet 已提交
1244
	int __percpu		*pcpu_refcnt;
1245

L
Linus Torvalds 已提交
1246 1247 1248 1249 1250
	/* delayed register/unregister */
	struct list_head	todo_list;
	/* device index hash chain */
	struct hlist_node	index_hlist;

1251
	struct list_head	link_watch_list;
1252

L
Linus Torvalds 已提交
1253 1254
	/* register/unregister state machine */
	enum { NETREG_UNINITIALIZED=0,
1255
	       NETREG_REGISTERED,	/* completed register_netdevice */
L
Linus Torvalds 已提交
1256 1257 1258
	       NETREG_UNREGISTERING,	/* called unregister_netdevice */
	       NETREG_UNREGISTERED,	/* completed unregister todo */
	       NETREG_RELEASED,		/* called free_netdev */
1259
	       NETREG_DUMMY,		/* dummy device for NAPI poll */
1260 1261 1262
	} reg_state:8;

	bool dismantle; /* device is going do be freed */
1263 1264 1265 1266 1267

	enum {
		RTNL_LINK_INITIALIZED,
		RTNL_LINK_INITIALIZING,
	} rtnl_link_state:16;
L
Linus Torvalds 已提交
1268

1269 1270
	/* Called from unregister, can be used to call free_netdev */
	void (*destructor)(struct net_device *dev);
L
Linus Torvalds 已提交
1271 1272

#ifdef CONFIG_NETPOLL
1273
	struct netpoll_info	*npinfo;
L
Linus Torvalds 已提交
1274
#endif
1275

1276
#ifdef CONFIG_NET_NS
1277 1278
	/* Network namespace this network device is inside */
	struct net		*nd_net;
1279
#endif
1280

D
David S. Miller 已提交
1281
	/* mid-layer private */
E
Eric Dumazet 已提交
1282 1283 1284
	union {
		void				*ml_priv;
		struct pcpu_lstats __percpu	*lstats; /* loopback stats */
1285
		struct pcpu_tstats __percpu	*tstats; /* tunnel stats */
1286
		struct pcpu_dstats __percpu	*dstats; /* dummy stats */
E
Eric Dumazet 已提交
1287
	};
1288
	/* GARP */
E
Eric Dumazet 已提交
1289
	struct garp_port __rcu	*garp_port;
L
Linus Torvalds 已提交
1290 1291

	/* class/net/name entry */
1292
	struct device		dev;
1293 1294
	/* space for optional device, statistics, and wireless sysfs groups */
	const struct attribute_group *sysfs_groups[4];
P
Patrick McHardy 已提交
1295 1296 1297

	/* rtnetlink link ops */
	const struct rtnl_link_ops *rtnl_link_ops;
1298

1299 1300 1301
	/* for setting kernel sock attribute on TCP connection setup */
#define GSO_MAX_SIZE		65536
	unsigned int		gso_max_size;
1302

J
Jeff Kirsher 已提交
1303
#ifdef CONFIG_DCB
1304
	/* Data Center Bridging netlink ops */
1305
	const struct dcbnl_rtnl_ops *dcbnl_ops;
1306
#endif
1307 1308 1309
	u8 num_tc;
	struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
	u8 prio_tc_map[TC_BITMASK + 1];
1310

1311 1312 1313 1314
#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
	/* max exchange id for FCoE LRO by ddp */
	unsigned int		fcoe_ddp_xid;
#endif
1315 1316
	/* phy device may attach itself for hardware timestamping */
	struct phy_device *phydev;
1317 1318 1319

	/* group the device belongs to */
	int group;
L
Linus Torvalds 已提交
1320
};
1321
#define to_net_dev(d) container_of(d, struct net_device, dev)
L
Linus Torvalds 已提交
1322 1323 1324

#define	NETDEV_ALIGN		32

1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375
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;
}

1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394
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);
}

1395 1396 1397 1398 1399 1400
/*
 * Net namespace inlines
 */
static inline
struct net *dev_net(const struct net_device *dev)
{
E
Eric Dumazet 已提交
1401
	return read_pnet(&dev->nd_net);
1402 1403 1404
}

static inline
1405
void dev_net_set(struct net_device *dev, struct net *net)
1406 1407
{
#ifdef CONFIG_NET_NS
1408 1409
	release_net(dev->nd_net);
	dev->nd_net = hold_net(net);
1410 1411 1412
#endif
}

1413 1414 1415 1416 1417 1418 1419 1420 1421 1422
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;
}

1423 1424 1425 1426 1427 1428 1429 1430 1431
#ifndef CONFIG_NET_NS
static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
{
	skb->dev = dev;
}
#else /* CONFIG_NET_NS */
void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
#endif

1432 1433 1434 1435 1436 1437 1438 1439 1440 1441
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;
}

1442 1443 1444 1445 1446 1447
/**
 *	netdev_priv - access network device private data
 *	@dev: network device
 *
 * Get network device private data
 */
1448
static inline void *netdev_priv(const struct net_device *dev)
L
Linus Torvalds 已提交
1449
{
1450
	return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
L
Linus Torvalds 已提交
1451 1452 1453 1454 1455
}

/* Set the sysfs physical device reference for the network logical device
 * if set prior to registration will cause a symlink during initialization.
 */
1456
#define SET_NETDEV_DEV(net, pdev)	((net)->dev.parent = (pdev))
L
Linus Torvalds 已提交
1457

1458 1459 1460 1461 1462 1463
/* Set the sysfs device type for the network logical device to allow
 * fin grained indentification of different network device types. For
 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
 */
#define SET_NETDEV_DEVTYPE(net, devtype)	((net)->dev.type = (devtype))

1464 1465 1466 1467 1468 1469 1470 1471 1472 1473
/**
 *	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.
 */
1474 1475
void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
		    int (*poll)(struct napi_struct *, int), int weight);
1476

1477 1478 1479 1480 1481 1482
/**
 *  netif_napi_del - remove a napi context
 *  @napi: napi context
 *
 *  netif_napi_del() removes a napi context from the network device napi list
 */
1483 1484 1485
void netif_napi_del(struct napi_struct *napi);

struct napi_gro_cb {
1486 1487 1488
	/* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
	void *frag0;

1489 1490 1491
	/* Length of frag0. */
	unsigned int frag0_len;

1492 1493 1494
	/* This indicates where we are processing relative to skb->data. */
	int data_offset;

1495 1496 1497 1498 1499 1500 1501 1502
	/* This is non-zero if the packet may be of the same flow. */
	int same_flow;

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

	/* Number of segments aggregated. */
	int count;
H
Herbert Xu 已提交
1503 1504 1505

	/* Free the skb? */
	int free;
1506 1507 1508
};

#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1509

L
Linus Torvalds 已提交
1510
struct packet_type {
D
David S. Miller 已提交
1511 1512 1513 1514 1515 1516
	__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 *);
1517
	struct sk_buff		*(*gso_segment)(struct sk_buff *skb,
1518
						u32 features);
1519
	int			(*gso_send_check)(struct sk_buff *skb);
1520 1521 1522
	struct sk_buff		**(*gro_receive)(struct sk_buff **head,
					       struct sk_buff *skb);
	int			(*gro_complete)(struct sk_buff *skb);
L
Linus Torvalds 已提交
1523 1524 1525 1526 1527 1528
	void			*af_packet_priv;
	struct list_head	list;
};

#include <linux/notifier.h>

1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561
/* 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
#define NETDEV_CHANGEMTU	0x0007
#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
#define NETDEV_UNREGISTER_BATCH 0x0011
#define NETDEV_RELEASE		0x0012
#define NETDEV_NOTIFY_PEERS	0x0013
#define NETDEV_JOIN		0x0014

extern int register_netdevice_notifier(struct notifier_block *nb);
extern int unregister_netdevice_notifier(struct notifier_block *nb);
extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);


L
Linus Torvalds 已提交
1562 1563
extern rwlock_t				dev_base_lock;		/* Device list lock */

1564

1565 1566
#define for_each_netdev(net, d)		\
		list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1567 1568
#define for_each_netdev_reverse(net, d)	\
		list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1569 1570
#define for_each_netdev_rcu(net, d)		\
		list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1571 1572 1573 1574
#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)
1575 1576
#define for_each_netdev_continue_rcu(net, d)		\
	list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1577
#define net_device_entry(lh)	list_entry(lh, struct net_device, dev_list)
1578

1579 1580 1581 1582 1583
static inline struct net_device *next_net_device(struct net_device *dev)
{
	struct list_head *lh;
	struct net *net;

1584
	net = dev_net(dev);
1585 1586 1587 1588
	lh = dev->dev_list.next;
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

1589 1590 1591 1592 1593 1594
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
1595
	lh = rcu_dereference(list_next_rcu(&dev->dev_list));
1596 1597 1598
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

1599 1600 1601 1602 1603
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);
}
1604

E
Eric Dumazet 已提交
1605 1606 1607 1608 1609 1610 1611
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);
}

L
Linus Torvalds 已提交
1612 1613
extern int 			netdev_boot_setup_check(struct net_device *dev);
extern unsigned long		netdev_boot_base(const char *prefix, int unit);
1614 1615
extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
					      const char *hwaddr);
1616 1617
extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
L
Linus Torvalds 已提交
1618 1619 1620 1621
extern void		dev_add_pack(struct packet_type *pt);
extern void		dev_remove_pack(struct packet_type *pt);
extern void		__dev_remove_pack(struct packet_type *pt);

E
Eric Dumazet 已提交
1622 1623
extern struct net_device	*dev_get_by_flags_rcu(struct net *net, unsigned short flags,
						      unsigned short mask);
1624
extern struct net_device	*dev_get_by_name(struct net *net, const char *name);
1625
extern struct net_device	*dev_get_by_name_rcu(struct net *net, const char *name);
1626
extern struct net_device	*__dev_get_by_name(struct net *net, const char *name);
L
Linus Torvalds 已提交
1627 1628 1629
extern int		dev_alloc_name(struct net_device *dev, const char *name);
extern int		dev_open(struct net_device *dev);
extern int		dev_close(struct net_device *dev);
1630
extern void		dev_disable_lro(struct net_device *dev);
L
Linus Torvalds 已提交
1631 1632
extern int		dev_queue_xmit(struct sk_buff *skb);
extern int		register_netdevice(struct net_device *dev);
1633 1634
extern void		unregister_netdevice_queue(struct net_device *dev,
						   struct list_head *head);
1635
extern void		unregister_netdevice_many(struct list_head *head);
1636 1637 1638 1639 1640
static inline void unregister_netdevice(struct net_device *dev)
{
	unregister_netdevice_queue(dev, NULL);
}

E
Eric Dumazet 已提交
1641
extern int 		netdev_refcnt_read(const struct net_device *dev);
L
Linus Torvalds 已提交
1642 1643
extern void		free_netdev(struct net_device *dev);
extern void		synchronize_net(void);
1644
extern int		init_dummy_netdev(struct net_device *dev);
1645
extern void		netdev_resync_ops(struct net_device *dev);
1646

1647 1648
extern struct net_device	*dev_get_by_index(struct net *net, int ifindex);
extern struct net_device	*__dev_get_by_index(struct net *net, int ifindex);
1649
extern struct net_device	*dev_get_by_index_rcu(struct net *net, int ifindex);
L
Linus Torvalds 已提交
1650 1651 1652 1653
extern int		dev_restart(struct net_device *dev);
#ifdef CONFIG_NETPOLL_TRAP
extern int		netpoll_trap(void);
#endif
1654 1655
extern int	       skb_gro_receive(struct sk_buff **head,
				       struct sk_buff *skb);
1656
extern void	       skb_gro_reset_offset(struct sk_buff *skb);
1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672

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;
}

1673 1674
static inline void *skb_gro_header_fast(struct sk_buff *skb,
					unsigned int offset)
1675
{
1676 1677
	return NAPI_GRO_CB(skb)->frag0 + offset;
}
1678

1679 1680 1681 1682
static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
{
	return NAPI_GRO_CB(skb)->frag0_len < hlen;
}
1683

1684 1685 1686
static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
					unsigned int offset)
{
1687 1688 1689
	if (!pskb_may_pull(skb, hlen))
		return NULL;

1690 1691
	NAPI_GRO_CB(skb)->frag0 = NULL;
	NAPI_GRO_CB(skb)->frag0_len = 0;
1692
	return skb->data + offset;
1693
}
L
Linus Torvalds 已提交
1694

1695 1696
static inline void *skb_gro_mac_header(struct sk_buff *skb)
{
1697
	return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1698 1699
}

H
Herbert Xu 已提交
1700 1701
static inline void *skb_gro_network_header(struct sk_buff *skb)
{
1702 1703
	return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
	       skb_network_offset(skb);
H
Herbert Xu 已提交
1704 1705
}

1706 1707
static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
				  unsigned short type,
1708 1709
				  const void *daddr, const void *saddr,
				  unsigned len)
1710
{
1711
	if (!dev->header_ops || !dev->header_ops->create)
1712
		return 0;
1713 1714

	return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1715 1716
}

S
Stephen Hemminger 已提交
1717 1718 1719 1720 1721
static inline int dev_parse_header(const struct sk_buff *skb,
				   unsigned char *haddr)
{
	const struct net_device *dev = skb->dev;

1722
	if (!dev->header_ops || !dev->header_ops->parse)
S
Stephen Hemminger 已提交
1723
		return 0;
1724
	return dev->header_ops->parse(skb, haddr);
S
Stephen Hemminger 已提交
1725 1726
}

L
Linus Torvalds 已提交
1727 1728 1729 1730 1731 1732 1733 1734
typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
extern int		register_gifconf(unsigned int family, gifconf_func_t * gifconf);
static inline int unregister_gifconf(unsigned int family)
{
	return register_gifconf(family, NULL);
}

/*
E
Eric Dumazet 已提交
1735
 * Incoming packets are placed on per-cpu queues
L
Linus Torvalds 已提交
1736
 */
E
Eric Dumazet 已提交
1737
struct softnet_data {
1738
	struct Qdisc		*output_queue;
1739
	struct Qdisc		**output_queue_tailp;
L
Linus Torvalds 已提交
1740 1741
	struct list_head	poll_list;
	struct sk_buff		*completion_queue;
1742
	struct sk_buff_head	process_queue;
L
Linus Torvalds 已提交
1743

C
Changli Gao 已提交
1744
	/* stats */
1745 1746 1747 1748
	unsigned int		processed;
	unsigned int		time_squeeze;
	unsigned int		cpu_collision;
	unsigned int		received_rps;
C
Changli Gao 已提交
1749

1750
#ifdef CONFIG_RPS
E
Eric Dumazet 已提交
1751 1752 1753
	struct softnet_data	*rps_ipi_list;

	/* Elements below can be accessed between CPUs for RPS */
T
Tom Herbert 已提交
1754
	struct call_single_data	csd ____cacheline_aligned_in_smp;
E
Eric Dumazet 已提交
1755 1756
	struct softnet_data	*rps_ipi_next;
	unsigned int		cpu;
T
Tom Herbert 已提交
1757
	unsigned int		input_queue_head;
1758
	unsigned int		input_queue_tail;
1759
#endif
C
Changli Gao 已提交
1760
	unsigned		dropped;
T
Tom Herbert 已提交
1761
	struct sk_buff_head	input_pkt_queue;
1762
	struct napi_struct	backlog;
L
Linus Torvalds 已提交
1763 1764
};

1765
static inline void input_queue_head_incr(struct softnet_data *sd)
T
Tom Herbert 已提交
1766 1767
{
#ifdef CONFIG_RPS
1768 1769 1770 1771 1772 1773 1774 1775 1776
	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
1777 1778 1779
#endif
}

T
Tom Herbert 已提交
1780
DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
L
Linus Torvalds 已提交
1781

1782
extern void __netif_schedule(struct Qdisc *q);
L
Linus Torvalds 已提交
1783

1784
static inline void netif_schedule_queue(struct netdev_queue *txq)
L
Linus Torvalds 已提交
1785
{
1786
	if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1787
		__netif_schedule(txq->qdisc);
1788 1789
}

1790 1791 1792 1793 1794 1795 1796 1797
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));
}

1798 1799 1800 1801 1802
static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
{
	clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
}

1803 1804 1805 1806 1807 1808
/**
 *	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
1809 1810
static inline void netif_start_queue(struct net_device *dev)
{
1811
	netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1812 1813
}

1814 1815 1816 1817 1818 1819 1820 1821 1822 1823
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);
	}
}

1824
static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
L
Linus Torvalds 已提交
1825 1826
{
#ifdef CONFIG_NETPOLL_TRAP
1827
	if (netpoll_trap()) {
1828
		netif_tx_start_queue(dev_queue);
L
Linus Torvalds 已提交
1829
		return;
1830
	}
L
Linus Torvalds 已提交
1831
#endif
1832
	if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1833
		__netif_schedule(dev_queue->qdisc);
1834 1835
}

1836 1837 1838 1839 1840 1841 1842
/**
 *	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.
 */
1843 1844
static inline void netif_wake_queue(struct net_device *dev)
{
1845
	netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1846 1847
}

1848 1849 1850 1851 1852 1853 1854 1855 1856 1857
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);
	}
}

1858 1859
static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
{
1860
	if (WARN_ON(!dev_queue)) {
1861
		pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
1862 1863
		return;
	}
1864 1865 1866
	set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
}

1867 1868 1869 1870 1871 1872 1873
/**
 *	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
1874 1875
static inline void netif_stop_queue(struct net_device *dev)
{
1876
	netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1877 1878
}

1879 1880 1881 1882 1883 1884 1885 1886 1887 1888
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);
	}
}

1889 1890 1891 1892 1893
static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
{
	return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
}

1894 1895 1896 1897 1898 1899
/**
 *	netif_queue_stopped - test if transmit queue is flowblocked
 *	@dev: network device
 *
 *	Test if transmit queue on device is currently unable to send.
 */
L
Linus Torvalds 已提交
1900 1901
static inline int netif_queue_stopped(const struct net_device *dev)
{
1902
	return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1903 1904
}

1905
static inline int netif_tx_queue_frozen_or_stopped(const struct netdev_queue *dev_queue)
1906
{
1907
	return dev_queue->state & QUEUE_STATE_XOFF_OR_FROZEN;
1908 1909
}

1910 1911 1912 1913 1914 1915
/**
 *	netif_running - test if up
 *	@dev: network device
 *
 *	Test if the device has been brought up.
 */
L
Linus Torvalds 已提交
1916 1917 1918 1919 1920
static inline int netif_running(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_START, &dev->state);
}

1921 1922 1923 1924 1925 1926
/*
 * 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.
 */
1927 1928 1929 1930 1931 1932 1933 1934

/**
 *	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.
 */
1935 1936
static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
{
1937
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1938 1939

	netif_tx_start_queue(txq);
1940 1941
}

1942 1943 1944 1945 1946 1947 1948
/**
 *	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.
 */
1949 1950
static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
{
1951
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1952 1953 1954 1955
#ifdef CONFIG_NETPOLL_TRAP
	if (netpoll_trap())
		return;
#endif
1956
	netif_tx_stop_queue(txq);
1957 1958
}

1959 1960 1961 1962 1963 1964 1965
/**
 *	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.
 */
1966
static inline int __netif_subqueue_stopped(const struct net_device *dev,
1967 1968
					 u16 queue_index)
{
1969
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1970 1971

	return netif_tx_queue_stopped(txq);
1972 1973
}

1974 1975 1976 1977 1978
static inline int netif_subqueue_stopped(const struct net_device *dev,
					 struct sk_buff *skb)
{
	return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
}
1979 1980 1981 1982 1983 1984 1985 1986

/**
 *	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.
 */
1987 1988
static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
{
1989
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1990 1991 1992 1993
#ifdef CONFIG_NETPOLL_TRAP
	if (netpoll_trap())
		return;
#endif
1994
	if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1995
		__netif_schedule(txq->qdisc);
1996 1997
}

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007
/*
 * 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);
}

2008 2009 2010 2011 2012 2013
/**
 *	netif_is_multiqueue - test if device has multiple transmit queues
 *	@dev: network device
 *
 * Check if device has multiple transmit queues
 */
2014 2015
static inline int netif_is_multiqueue(const struct net_device *dev)
{
E
Eric Dumazet 已提交
2016
	return dev->num_tx_queues > 1;
2017
}
L
Linus Torvalds 已提交
2018

2019 2020
extern int netif_set_real_num_tx_queues(struct net_device *dev,
					unsigned int txq);
2021

2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032
#ifdef CONFIG_RPS
extern int netif_set_real_num_rx_queues(struct net_device *dev,
					unsigned int rxq);
#else
static inline int netif_set_real_num_rx_queues(struct net_device *dev,
						unsigned int rxq)
{
	return 0;
}
#endif

2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044
static inline int netif_copy_real_num_queues(struct net_device *to_dev,
					     const struct net_device *from_dev)
{
	netif_set_real_num_tx_queues(to_dev, from_dev->real_num_tx_queues);
#ifdef CONFIG_RPS
	return netif_set_real_num_rx_queues(to_dev,
					    from_dev->real_num_rx_queues);
#else
	return 0;
#endif
}

L
Linus Torvalds 已提交
2045
/* Use this variant when it is known for sure that it
2046 2047
 * is executing from hardware interrupt context or with hardware interrupts
 * disabled.
L
Linus Torvalds 已提交
2048
 */
2049
extern void dev_kfree_skb_irq(struct sk_buff *skb);
L
Linus Torvalds 已提交
2050 2051

/* Use this variant in places where it could be invoked
2052 2053
 * from either hardware interrupt or other context, with hardware interrupts
 * either disabled or enabled.
L
Linus Torvalds 已提交
2054
 */
2055
extern void dev_kfree_skb_any(struct sk_buff *skb);
L
Linus Torvalds 已提交
2056 2057 2058 2059

extern int		netif_rx(struct sk_buff *skb);
extern int		netif_rx_ni(struct sk_buff *skb);
extern int		netif_receive_skb(struct sk_buff *skb);
2060
extern gro_result_t	dev_gro_receive(struct napi_struct *napi,
2061
					struct sk_buff *skb);
2062 2063
extern gro_result_t	napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
extern gro_result_t	napi_gro_receive(struct napi_struct *napi,
2064
					 struct sk_buff *skb);
E
Eric Dumazet 已提交
2065
extern void		napi_gro_flush(struct napi_struct *napi);
2066
extern struct sk_buff *	napi_get_frags(struct napi_struct *napi);
2067
extern gro_result_t	napi_frags_finish(struct napi_struct *napi,
2068 2069
					  struct sk_buff *skb,
					  gro_result_t ret);
2070
extern struct sk_buff *	napi_frags_skb(struct napi_struct *napi);
2071
extern gro_result_t	napi_gro_frags(struct napi_struct *napi);
2072 2073 2074 2075 2076 2077 2078

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

2079
extern int netdev_rx_handler_register(struct net_device *dev,
J
Jiri Pirko 已提交
2080 2081
				      rx_handler_func_t *rx_handler,
				      void *rx_handler_data);
2082 2083
extern void netdev_rx_handler_unregister(struct net_device *dev);

2084
extern int		dev_valid_name(const char *name);
2085 2086
extern int		dev_ioctl(struct net *net, unsigned int cmd, void __user *);
extern int		dev_ethtool(struct net *net, struct ifreq *);
L
Linus Torvalds 已提交
2087
extern unsigned		dev_get_flags(const struct net_device *);
2088
extern int		__dev_change_flags(struct net_device *, unsigned int flags);
L
Linus Torvalds 已提交
2089
extern int		dev_change_flags(struct net_device *, unsigned);
2090
extern void		__dev_notify_flags(struct net_device *, unsigned int old_flags);
2091
extern int		dev_change_name(struct net_device *, const char *);
2092
extern int		dev_set_alias(struct net_device *, const char *, size_t);
2093 2094
extern int		dev_change_net_namespace(struct net_device *,
						 struct net *, const char *);
L
Linus Torvalds 已提交
2095
extern int		dev_set_mtu(struct net_device *, int);
2096
extern void		dev_set_group(struct net_device *, int);
L
Linus Torvalds 已提交
2097 2098
extern int		dev_set_mac_address(struct net_device *,
					    struct sockaddr *);
2099
extern int		dev_hard_start_xmit(struct sk_buff *skb,
2100 2101
					    struct net_device *dev,
					    struct netdev_queue *txq);
2102 2103
extern int		dev_forward_skb(struct net_device *dev,
					struct sk_buff *skb);
L
Linus Torvalds 已提交
2104

2105
extern int		netdev_budget;
L
Linus Torvalds 已提交
2106 2107 2108 2109

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

2110 2111 2112 2113
/**
 *	dev_put - release reference to device
 *	@dev: network device
 *
2114
 * Release reference to device to allow it to be freed.
2115
 */
L
Linus Torvalds 已提交
2116 2117
static inline void dev_put(struct net_device *dev)
{
E
Eric Dumazet 已提交
2118
	irqsafe_cpu_dec(*dev->pcpu_refcnt);
L
Linus Torvalds 已提交
2119 2120
}

2121 2122 2123 2124
/**
 *	dev_hold - get reference to device
 *	@dev: network device
 *
2125
 * Hold reference to device to keep it from being freed.
2126
 */
2127 2128
static inline void dev_hold(struct net_device *dev)
{
E
Eric Dumazet 已提交
2129
	irqsafe_cpu_inc(*dev->pcpu_refcnt);
2130
}
L
Linus Torvalds 已提交
2131 2132 2133 2134

/* 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
2135 2136 2137 2138
 *
 * 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
2139 2140 2141
 */

extern void linkwatch_fire_event(struct net_device *dev);
2142
extern void linkwatch_forget_dev(struct net_device *dev);
L
Linus Torvalds 已提交
2143

2144 2145 2146 2147 2148 2149
/**
 *	netif_carrier_ok - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
L
Linus Torvalds 已提交
2150 2151 2152 2153 2154
static inline int netif_carrier_ok(const struct net_device *dev)
{
	return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
}

2155 2156
extern unsigned long dev_trans_start(struct net_device *dev);

L
Linus Torvalds 已提交
2157 2158
extern void __netdev_watchdog_up(struct net_device *dev);

2159
extern void netif_carrier_on(struct net_device *dev);
L
Linus Torvalds 已提交
2160

2161
extern void netif_carrier_off(struct net_device *dev);
L
Linus Torvalds 已提交
2162

2163 2164
extern void netif_notify_peers(struct net_device *dev);

2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177
/**
 *	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
2178 2179 2180 2181 2182 2183
static inline void netif_dormant_on(struct net_device *dev)
{
	if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

2184 2185 2186 2187 2188 2189
/**
 *	netif_dormant_off - set device as not dormant.
 *	@dev: network device
 *
 * Device is not in dormant state.
 */
S
Stefan Rompf 已提交
2190 2191 2192 2193 2194 2195
static inline void netif_dormant_off(struct net_device *dev)
{
	if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

2196 2197 2198 2199 2200 2201
/**
 *	netif_dormant - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
S
Stefan Rompf 已提交
2202 2203 2204 2205 2206 2207
static inline int netif_dormant(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_DORMANT, &dev->state);
}


2208 2209 2210 2211 2212 2213
/**
 *	netif_oper_up - test if device is operational
 *	@dev: network device
 *
 * Check if carrier is operational
 */
E
Eric Dumazet 已提交
2214 2215
static inline int netif_oper_up(const struct net_device *dev)
{
S
Stefan Rompf 已提交
2216 2217 2218 2219
	return (dev->operstate == IF_OPER_UP ||
		dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
}

2220 2221 2222 2223 2224 2225
/**
 *	netif_device_present - is device available or removed
 *	@dev: network device
 *
 * Check if device has not been removed from system.
 */
L
Linus Torvalds 已提交
2226 2227 2228 2229 2230
static inline int netif_device_present(struct net_device *dev)
{
	return test_bit(__LINK_STATE_PRESENT, &dev->state);
}

2231
extern void netif_device_detach(struct net_device *dev);
L
Linus Torvalds 已提交
2232

2233
extern void netif_device_attach(struct net_device *dev);
L
Linus Torvalds 已提交
2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283

/*
 * 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;
}

2284
static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
H
Herbert Xu 已提交
2285
{
2286 2287
	spin_lock(&txq->_xmit_lock);
	txq->xmit_lock_owner = cpu;
2288 2289
}

2290 2291 2292 2293 2294 2295
static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
{
	spin_lock_bh(&txq->_xmit_lock);
	txq->xmit_lock_owner = smp_processor_id();
}

2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315
static inline int __netif_tx_trylock(struct netdev_queue *txq)
{
	int ok = spin_trylock(&txq->_xmit_lock);
	if (likely(ok))
		txq->xmit_lock_owner = smp_processor_id();
	return ok;
}

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

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

E
Eric Dumazet 已提交
2316 2317 2318 2319 2320 2321
static inline void txq_trans_update(struct netdev_queue *txq)
{
	if (txq->xmit_lock_owner != -1)
		txq->trans_start = jiffies;
}

2322 2323 2324 2325 2326 2327
/**
 *	netif_tx_lock - grab network device transmit lock
 *	@dev: network device
 *
 * Get network device transmit lock
 */
2328 2329
static inline void netif_tx_lock(struct net_device *dev)
{
2330
	unsigned int i;
2331
	int cpu;
2332

2333 2334
	spin_lock(&dev->tx_global_lock);
	cpu = smp_processor_id();
2335 2336
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2337 2338 2339 2340 2341 2342 2343

		/* 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.
		 */
2344
		__netif_tx_lock(txq, cpu);
2345 2346
		set_bit(__QUEUE_STATE_FROZEN, &txq->state);
		__netif_tx_unlock(txq);
2347
	}
H
Herbert Xu 已提交
2348 2349 2350 2351
}

static inline void netif_tx_lock_bh(struct net_device *dev)
{
2352 2353
	local_bh_disable();
	netif_tx_lock(dev);
H
Herbert Xu 已提交
2354 2355 2356 2357
}

static inline void netif_tx_unlock(struct net_device *dev)
{
2358 2359 2360 2361
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2362

2363 2364 2365 2366 2367
		/* 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);
2368
		netif_schedule_queue(txq);
2369 2370
	}
	spin_unlock(&dev->tx_global_lock);
H
Herbert Xu 已提交
2371 2372 2373 2374
}

static inline void netif_tx_unlock_bh(struct net_device *dev)
{
2375 2376
	netif_tx_unlock(dev);
	local_bh_enable();
H
Herbert Xu 已提交
2377 2378
}

2379
#define HARD_TX_LOCK(dev, txq, cpu) {			\
2380
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
2381
		__netif_tx_lock(txq, cpu);		\
2382 2383 2384
	}						\
}

2385
#define HARD_TX_UNLOCK(dev, txq) {			\
2386
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
2387
		__netif_tx_unlock(txq);			\
2388 2389 2390
	}						\
}

L
Linus Torvalds 已提交
2391 2392
static inline void netif_tx_disable(struct net_device *dev)
{
2393
	unsigned int i;
2394
	int cpu;
2395

2396 2397
	local_bh_disable();
	cpu = smp_processor_id();
2398 2399
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2400 2401

		__netif_tx_lock(txq, cpu);
2402
		netif_tx_stop_queue(txq);
2403
		__netif_tx_unlock(txq);
2404
	}
2405
	local_bh_enable();
L
Linus Torvalds 已提交
2406 2407
}

2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427
static inline void netif_addr_lock(struct net_device *dev)
{
	spin_lock(&dev->addr_list_lock);
}

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

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

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

2428
/*
2429
 * dev_addrs walker. Should be used only for read access. Call with
2430 2431 2432
 * rcu_read_lock held.
 */
#define for_each_dev_addr(dev, ha) \
2433
		list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2434

L
Linus Torvalds 已提交
2435 2436 2437 2438 2439
/* These functions live elsewhere (drivers/net/net_init.c, but related) */

extern void		ether_setup(struct net_device *dev);

/* Support for loadable net-drivers */
T
Tom Herbert 已提交
2440
extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
2441
				       void (*setup)(struct net_device *),
T
Tom Herbert 已提交
2442
				       unsigned int txqs, unsigned int rxqs);
2443
#define alloc_netdev(sizeof_priv, name, setup) \
T
Tom Herbert 已提交
2444 2445 2446 2447 2448
	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)

L
Linus Torvalds 已提交
2449 2450
extern int		register_netdev(struct net_device *dev);
extern void		unregister_netdev(struct net_device *dev);
2451

2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467
/* General hardware address lists handling functions */
extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
				  struct netdev_hw_addr_list *from_list,
				  int addr_len, unsigned char addr_type);
extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
				   struct netdev_hw_addr_list *from_list,
				   int addr_len, unsigned char addr_type);
extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
			  struct netdev_hw_addr_list *from_list,
			  int addr_len);
extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
			     struct netdev_hw_addr_list *from_list,
			     int addr_len);
extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
extern void __hw_addr_init(struct netdev_hw_addr_list *list);

2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478
/* Functions used for device addresses handling */
extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
			unsigned char addr_type);
extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
			unsigned char addr_type);
extern int dev_addr_add_multiple(struct net_device *to_dev,
				 struct net_device *from_dev,
				 unsigned char addr_type);
extern int dev_addr_del_multiple(struct net_device *to_dev,
				 struct net_device *from_dev,
				 unsigned char addr_type);
2479 2480 2481 2482 2483 2484 2485 2486 2487 2488
extern void dev_addr_flush(struct net_device *dev);
extern int dev_addr_init(struct net_device *dev);

/* Functions used for unicast addresses handling */
extern int dev_uc_add(struct net_device *dev, unsigned char *addr);
extern int dev_uc_del(struct net_device *dev, unsigned char *addr);
extern int dev_uc_sync(struct net_device *to, struct net_device *from);
extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
extern void dev_uc_flush(struct net_device *dev);
extern void dev_uc_init(struct net_device *dev);
2489

2490 2491 2492 2493 2494 2495 2496 2497 2498
/* Functions used for multicast addresses handling */
extern int dev_mc_add(struct net_device *dev, unsigned char *addr);
extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr);
extern int dev_mc_del(struct net_device *dev, unsigned char *addr);
extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr);
extern int dev_mc_sync(struct net_device *to, struct net_device *from);
extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
extern void dev_mc_flush(struct net_device *dev);
extern void dev_mc_init(struct net_device *dev);
2499

2500 2501 2502
/* Functions used for secondary unicast and multicast support */
extern void		dev_set_rx_mode(struct net_device *dev);
extern void		__dev_set_rx_mode(struct net_device *dev);
2503 2504
extern int		dev_set_promiscuity(struct net_device *dev, int inc);
extern int		dev_set_allmulti(struct net_device *dev, int inc);
L
Linus Torvalds 已提交
2505
extern void		netdev_state_change(struct net_device *dev);
2506
extern int		netdev_bonding_change(struct net_device *dev,
2507
					      unsigned long event);
2508
extern void		netdev_features_change(struct net_device *dev);
L
Linus Torvalds 已提交
2509
/* Load a device via the kmod */
2510
extern void		dev_load(struct net *net, const char *name);
L
Linus Torvalds 已提交
2511
extern void		dev_mcast_init(void);
2512 2513
extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
					       struct rtnl_link_stats64 *storage);
2514

L
Linus Torvalds 已提交
2515
extern int		netdev_max_backlog;
E
Eric Dumazet 已提交
2516
extern int		netdev_tstamp_prequeue;
L
Linus Torvalds 已提交
2517
extern int		weight_p;
2518
extern int		bpf_jit_enable;
L
Linus Torvalds 已提交
2519
extern int		netdev_set_master(struct net_device *dev, struct net_device *master);
J
Jiri Pirko 已提交
2520 2521
extern int netdev_set_bond_master(struct net_device *dev,
				  struct net_device *master);
2522
extern int skb_checksum_help(struct sk_buff *skb);
2523
extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, u32 features);
2524 2525 2526 2527 2528 2529 2530
#ifdef CONFIG_BUG
extern void netdev_rx_csum_fault(struct net_device *dev);
#else
static inline void netdev_rx_csum_fault(struct net_device *dev)
{
}
#endif
L
Linus Torvalds 已提交
2531 2532 2533 2534
/* rx skb timestamps */
extern void		net_enable_timestamp(void);
extern void		net_disable_timestamp(void);

2535 2536 2537 2538 2539 2540
#ifdef CONFIG_PROC_FS
extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
extern void dev_seq_stop(struct seq_file *seq, void *v);
#endif

2541 2542 2543
extern int netdev_class_create_file(struct class_attribute *class_attr);
extern void netdev_class_remove_file(struct class_attribute *class_attr);

2544 2545
extern struct kobj_ns_type_operations net_ns_type_operations;

2546
extern const char *netdev_drivername(const struct net_device *dev);
2547

2548 2549
extern void linkwatch_run_queue(void);

2550 2551 2552 2553
static inline u32 netdev_get_wanted_features(struct net_device *dev)
{
	return (dev->features & ~dev->hw_features) | dev->wanted_features;
}
2554
u32 netdev_increment_features(u32 all, u32 one, u32 mask);
2555
int __netdev_update_features(struct net_device *dev);
2556
void netdev_update_features(struct net_device *dev);
2557
void netdev_change_features(struct net_device *dev);
2558

2559 2560 2561
void netif_stacked_transfer_operstate(const struct net_device *rootdev,
					struct net_device *dev);

2562
u32 netif_skb_features(struct sk_buff *skb);
2563

2564
static inline int net_gso_ok(u32 features, int gso_type)
2565
{
2566
	int feature = gso_type << NETIF_F_GSO_SHIFT;
2567
	return (features & feature) == feature;
2568 2569
}

2570
static inline int skb_gso_ok(struct sk_buff *skb, u32 features)
2571
{
H
Herbert Xu 已提交
2572
	return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2573
	       (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
2574 2575
}

2576
static inline int netif_needs_gso(struct sk_buff *skb, int features)
2577
{
2578 2579
	return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
		unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
2580 2581
}

2582 2583 2584 2585 2586 2587
static inline void netif_set_gso_max_size(struct net_device *dev,
					  unsigned int size)
{
	dev->gso_max_size = size;
}

J
Jiri Pirko 已提交
2588 2589 2590 2591 2592
static inline int netif_is_bond_slave(struct net_device *dev)
{
	return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
}

2593
extern struct pernet_operations __net_initdata loopback_net_ops;
2594 2595 2596

static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
{
2597 2598
	if (dev->features & NETIF_F_RXCSUM)
		return 1;
2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609
	if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
		return 0;
	return dev->ethtool_ops->get_rx_csum(dev);
}

static inline u32 dev_ethtool_get_flags(struct net_device *dev)
{
	if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
		return 0;
	return dev->ethtool_ops->get_flags(dev);
}
2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621

/* 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;
}

2622 2623 2624
extern int __netdev_printk(const char *level, const struct net_device *dev,
			struct va_format *vaf);

2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641
extern __printf(3, 4)
int netdev_printk(const char *level, const struct net_device *dev,
		  const char *format, ...);
extern __printf(2, 3)
int netdev_emerg(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_alert(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_crit(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_err(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_warn(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_notice(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_info(const struct net_device *dev, const char *format, ...);
2642

2643 2644 2645
#define MODULE_ALIAS_NETDEV(device) \
	MODULE_ALIAS("netdev-" device)

2646 2647 2648 2649 2650 2651
#if defined(DEBUG)
#define netdev_dbg(__dev, format, args...)			\
	netdev_printk(KERN_DEBUG, __dev, format, ##args)
#elif defined(CONFIG_DYNAMIC_DEBUG)
#define netdev_dbg(__dev, format, args...)			\
do {								\
2652
	dynamic_netdev_dbg(__dev, format, ##args);		\
2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682
} while (0)
#else
#define netdev_dbg(__dev, format, args...)			\
({								\
	if (0)							\
		netdev_printk(KERN_DEBUG, __dev, format, ##args); \
	0;							\
})
#endif

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

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

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

2683 2684 2685 2686 2687 2688 2689 2690
/* 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)

2691 2692 2693 2694 2695 2696
#define netif_level(level, priv, type, dev, fmt, args...)	\
do {								\
	if (netif_msg_##type(priv))				\
		netdev_##level(dev, fmt, ##args);		\
} while (0)

2697
#define netif_emerg(priv, type, dev, fmt, args...)		\
2698
	netif_level(emerg, priv, type, dev, fmt, ##args)
2699
#define netif_alert(priv, type, dev, fmt, args...)		\
2700
	netif_level(alert, priv, type, dev, fmt, ##args)
2701
#define netif_crit(priv, type, dev, fmt, args...)		\
2702
	netif_level(crit, priv, type, dev, fmt, ##args)
2703
#define netif_err(priv, type, dev, fmt, args...)		\
2704
	netif_level(err, priv, type, dev, fmt, ##args)
2705
#define netif_warn(priv, type, dev, fmt, args...)		\
2706
	netif_level(warn, priv, type, dev, fmt, ##args)
2707
#define netif_notice(priv, type, dev, fmt, args...)		\
2708
	netif_level(notice, priv, type, dev, fmt, ##args)
2709
#define netif_info(priv, type, dev, fmt, args...)		\
2710
	netif_level(info, priv, type, dev, fmt, ##args)
2711 2712 2713 2714 2715 2716 2717 2718

#if defined(DEBUG)
#define netif_dbg(priv, type, dev, format, args...)		\
	netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
#elif defined(CONFIG_DYNAMIC_DEBUG)
#define netif_dbg(priv, type, netdev, format, args...)		\
do {								\
	if (netif_msg_##type(priv))				\
2719
		dynamic_netdev_dbg(netdev, format, ##args);	\
2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730
} while (0)
#else
#define netif_dbg(priv, type, dev, format, args...)			\
({									\
	if (0)								\
		netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
	0;								\
})
#endif

#if defined(VERBOSE_DEBUG)
2731
#define netif_vdbg	netif_dbg
2732 2733 2734 2735
#else
#define netif_vdbg(priv, type, dev, format, args...)		\
({								\
	if (0)							\
2736
		netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2737 2738 2739
	0;							\
})
#endif
2740

L
Linus Torvalds 已提交
2741 2742
#endif /* __KERNEL__ */

2743
#endif	/* _LINUX_NETDEVICE_H */