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1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Definitions for the Interfaces handler.
7 *
8 * Version: @(#)dev.h 1.0.10 08/12/93
9 *
10 * Authors: Ross Biro
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
17 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
22 *
23 * Moved to /usr/include/linux for NET3
24 */
25#ifndef _LINUX_NETDEVICE_H
26#define _LINUX_NETDEVICE_H
27
28#include <linux/if.h>
29#include <linux/if_ether.h>
30#include <linux/if_packet.h>
31
32#ifdef __KERNEL__
33#include <linux/timer.h>
34#include <linux/delay.h>
35#include <linux/mm.h>
36#include <asm/atomic.h>
37#include <asm/cache.h>
38#include <asm/byteorder.h>
39
40#include <linux/device.h>
41#include <linux/percpu.h>
42#include <linux/rculist.h>
43#include <linux/dmaengine.h>
44#include <linux/workqueue.h>
45
46#include <linux/ethtool.h>
47#include <net/net_namespace.h>
48#include <net/dsa.h>
49#ifdef CONFIG_DCB
50#include <net/dcbnl.h>
51#endif
52
53struct vlan_group;
54struct netpoll_info;
55/* 802.11 specific */
56struct wireless_dev;
57 /* source back-compat hooks */
58#define SET_ETHTOOL_OPS(netdev,ops) \
59 ( (netdev)->ethtool_ops = (ops) )
60
61#define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
62 functions are available. */
63#define HAVE_FREE_NETDEV /* free_netdev() */
64#define HAVE_NETDEV_PRIV /* netdev_priv() */
65
66/* Backlog congestion levels */
67#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
68#define NET_RX_DROP 1 /* packet dropped */
69
70/*
71 * Transmit return codes: transmit return codes originate from three different
72 * namespaces:
73 *
74 * - qdisc return codes
75 * - driver transmit return codes
76 * - errno values
77 *
78 * Drivers are allowed to return any one of those in their hard_start_xmit()
79 * function. Real network devices commonly used with qdiscs should only return
80 * the driver transmit return codes though - when qdiscs are used, the actual
81 * transmission happens asynchronously, so the value is not propagated to
82 * higher layers. Virtual network devices transmit synchronously, in this case
83 * the driver transmit return codes are consumed by dev_queue_xmit(), all
84 * others are propagated to higher layers.
85 */
86
87/* qdisc ->enqueue() return codes. */
88#define NET_XMIT_SUCCESS 0x00
89#define NET_XMIT_DROP 0x01 /* skb dropped */
90#define NET_XMIT_CN 0x02 /* congestion notification */
91#define NET_XMIT_POLICED 0x03 /* skb is shot by police */
92#define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
93
94/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
95 * indicates that the device will soon be dropping packets, or already drops
96 * some packets of the same priority; prompting us to send less aggressively. */
97#define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
98#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
99
100/* Driver transmit return codes */
101#define NETDEV_TX_MASK 0xf0
102
103enum netdev_tx {
104 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
105 NETDEV_TX_OK = 0x00, /* driver took care of packet */
106 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
107 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
108};
109typedef enum netdev_tx netdev_tx_t;
110
111/*
112 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
113 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
114 */
115static inline bool dev_xmit_complete(int rc)
116{
117 /*
118 * Positive cases with an skb consumed by a driver:
119 * - successful transmission (rc == NETDEV_TX_OK)
120 * - error while transmitting (rc < 0)
121 * - error while queueing to a different device (rc & NET_XMIT_MASK)
122 */
123 if (likely(rc < NET_XMIT_MASK))
124 return true;
125
126 return false;
127}
128
129#endif
130
131#define MAX_ADDR_LEN 32 /* Largest hardware address length */
132
133#ifdef __KERNEL__
134/*
135 * Compute the worst case header length according to the protocols
136 * used.
137 */
138
139#if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
140# if defined(CONFIG_MAC80211_MESH)
141# define LL_MAX_HEADER 128
142# else
143# define LL_MAX_HEADER 96
144# endif
145#elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
146# define LL_MAX_HEADER 48
147#else
148# define LL_MAX_HEADER 32
149#endif
150
151#if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
152 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
153 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
154 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
155#define MAX_HEADER LL_MAX_HEADER
156#else
157#define MAX_HEADER (LL_MAX_HEADER + 48)
158#endif
159
160#endif /* __KERNEL__ */
161
162/*
163 * Network device statistics. Akin to the 2.0 ether stats but
164 * with byte counters.
165 */
166
167struct net_device_stats {
168 unsigned long rx_packets; /* total packets received */
169 unsigned long tx_packets; /* total packets transmitted */
170 unsigned long rx_bytes; /* total bytes received */
171 unsigned long tx_bytes; /* total bytes transmitted */
172 unsigned long rx_errors; /* bad packets received */
173 unsigned long tx_errors; /* packet transmit problems */
174 unsigned long rx_dropped; /* no space in linux buffers */
175 unsigned long tx_dropped; /* no space available in linux */
176 unsigned long multicast; /* multicast packets received */
177 unsigned long collisions;
178
179 /* detailed rx_errors: */
180 unsigned long rx_length_errors;
181 unsigned long rx_over_errors; /* receiver ring buff overflow */
182 unsigned long rx_crc_errors; /* recved pkt with crc error */
183 unsigned long rx_frame_errors; /* recv'd frame alignment error */
184 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
185 unsigned long rx_missed_errors; /* receiver missed packet */
186
187 /* detailed tx_errors */
188 unsigned long tx_aborted_errors;
189 unsigned long tx_carrier_errors;
190 unsigned long tx_fifo_errors;
191 unsigned long tx_heartbeat_errors;
192 unsigned long tx_window_errors;
193
194 /* for cslip etc */
195 unsigned long rx_compressed;
196 unsigned long tx_compressed;
197};
198
199
200/* Media selection options. */
201enum {
202 IF_PORT_UNKNOWN = 0,
203 IF_PORT_10BASE2,
204 IF_PORT_10BASET,
205 IF_PORT_AUI,
206 IF_PORT_100BASET,
207 IF_PORT_100BASETX,
208 IF_PORT_100BASEFX
209};
210
211#ifdef __KERNEL__
212
213#include <linux/cache.h>
214#include <linux/skbuff.h>
215
216struct neighbour;
217struct neigh_parms;
218struct sk_buff;
219
220struct netif_rx_stats {
221 unsigned total;
222 unsigned dropped;
223 unsigned time_squeeze;
224 unsigned cpu_collision;
225};
226
227DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
228
229struct dev_addr_list {
230 struct dev_addr_list *next;
231 u8 da_addr[MAX_ADDR_LEN];
232 u8 da_addrlen;
233 u8 da_synced;
234 int da_users;
235 int da_gusers;
236};
237
238/*
239 * We tag multicasts with these structures.
240 */
241
242#define dev_mc_list dev_addr_list
243#define dmi_addr da_addr
244#define dmi_addrlen da_addrlen
245#define dmi_users da_users
246#define dmi_gusers da_gusers
247
248struct netdev_hw_addr {
249 struct list_head list;
250 unsigned char addr[MAX_ADDR_LEN];
251 unsigned char type;
252#define NETDEV_HW_ADDR_T_LAN 1
253#define NETDEV_HW_ADDR_T_SAN 2
254#define NETDEV_HW_ADDR_T_SLAVE 3
255#define NETDEV_HW_ADDR_T_UNICAST 4
256 int refcount;
257 bool synced;
258 struct rcu_head rcu_head;
259};
260
261struct netdev_hw_addr_list {
262 struct list_head list;
263 int count;
264};
265
266struct hh_cache {
267 struct hh_cache *hh_next; /* Next entry */
268 atomic_t hh_refcnt; /* number of users */
269/*
270 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
271 * cache line on SMP.
272 * They are mostly read, but hh_refcnt may be changed quite frequently,
273 * incurring cache line ping pongs.
274 */
275 __be16 hh_type ____cacheline_aligned_in_smp;
276 /* protocol identifier, f.e ETH_P_IP
277 * NOTE: For VLANs, this will be the
278 * encapuslated type. --BLG
279 */
280 u16 hh_len; /* length of header */
281 int (*hh_output)(struct sk_buff *skb);
282 seqlock_t hh_lock;
283
284 /* cached hardware header; allow for machine alignment needs. */
285#define HH_DATA_MOD 16
286#define HH_DATA_OFF(__len) \
287 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
288#define HH_DATA_ALIGN(__len) \
289 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
290 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
291};
292
293/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
294 * Alternative is:
295 * dev->hard_header_len ? (dev->hard_header_len +
296 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
297 *
298 * We could use other alignment values, but we must maintain the
299 * relationship HH alignment <= LL alignment.
300 *
301 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
302 * may need.
303 */
304#define LL_RESERVED_SPACE(dev) \
305 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
306#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
307 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
308#define LL_ALLOCATED_SPACE(dev) \
309 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
310
311struct header_ops {
312 int (*create) (struct sk_buff *skb, struct net_device *dev,
313 unsigned short type, const void *daddr,
314 const void *saddr, unsigned len);
315 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
316 int (*rebuild)(struct sk_buff *skb);
317#define HAVE_HEADER_CACHE
318 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
319 void (*cache_update)(struct hh_cache *hh,
320 const struct net_device *dev,
321 const unsigned char *haddr);
322};
323
324/* These flag bits are private to the generic network queueing
325 * layer, they may not be explicitly referenced by any other
326 * code.
327 */
328
329enum netdev_state_t {
330 __LINK_STATE_START,
331 __LINK_STATE_PRESENT,
332 __LINK_STATE_NOCARRIER,
333 __LINK_STATE_LINKWATCH_PENDING,
334 __LINK_STATE_DORMANT,
335};
336
337
338/*
339 * This structure holds at boot time configured netdevice settings. They
340 * are then used in the device probing.
341 */
342struct netdev_boot_setup {
343 char name[IFNAMSIZ];
344 struct ifmap map;
345};
346#define NETDEV_BOOT_SETUP_MAX 8
347
348extern int __init netdev_boot_setup(char *str);
349
350/*
351 * Structure for NAPI scheduling similar to tasklet but with weighting
352 */
353struct napi_struct {
354 /* The poll_list must only be managed by the entity which
355 * changes the state of the NAPI_STATE_SCHED bit. This means
356 * whoever atomically sets that bit can add this napi_struct
357 * to the per-cpu poll_list, and whoever clears that bit
358 * can remove from the list right before clearing the bit.
359 */
360 struct list_head poll_list;
361
362 unsigned long state;
363 int weight;
364 int (*poll)(struct napi_struct *, int);
365#ifdef CONFIG_NETPOLL
366 spinlock_t poll_lock;
367 int poll_owner;
368#endif
369
370 unsigned int gro_count;
371
372 struct net_device *dev;
373 struct list_head dev_list;
374 struct sk_buff *gro_list;
375 struct sk_buff *skb;
376};
377
378enum {
379 NAPI_STATE_SCHED, /* Poll is scheduled */
380 NAPI_STATE_DISABLE, /* Disable pending */
381 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
382};
383
384enum gro_result {
385 GRO_MERGED,
386 GRO_MERGED_FREE,
387 GRO_HELD,
388 GRO_NORMAL,
389 GRO_DROP,
390};
391typedef enum gro_result gro_result_t;
392
393extern void __napi_schedule(struct napi_struct *n);
394
395static inline int napi_disable_pending(struct napi_struct *n)
396{
397 return test_bit(NAPI_STATE_DISABLE, &n->state);
398}
399
400/**
401 * napi_schedule_prep - check if napi can be scheduled
402 * @n: napi context
403 *
404 * Test if NAPI routine is already running, and if not mark
405 * it as running. This is used as a condition variable
406 * insure only one NAPI poll instance runs. We also make
407 * sure there is no pending NAPI disable.
408 */
409static inline int napi_schedule_prep(struct napi_struct *n)
410{
411 return !napi_disable_pending(n) &&
412 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
413}
414
415/**
416 * napi_schedule - schedule NAPI poll
417 * @n: napi context
418 *
419 * Schedule NAPI poll routine to be called if it is not already
420 * running.
421 */
422static inline void napi_schedule(struct napi_struct *n)
423{
424 if (napi_schedule_prep(n))
425 __napi_schedule(n);
426}
427
428/* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
429static inline int napi_reschedule(struct napi_struct *napi)
430{
431 if (napi_schedule_prep(napi)) {
432 __napi_schedule(napi);
433 return 1;
434 }
435 return 0;
436}
437
438/**
439 * napi_complete - NAPI processing complete
440 * @n: napi context
441 *
442 * Mark NAPI processing as complete.
443 */
444extern void __napi_complete(struct napi_struct *n);
445extern void napi_complete(struct napi_struct *n);
446
447/**
448 * napi_disable - prevent NAPI from scheduling
449 * @n: napi context
450 *
451 * Stop NAPI from being scheduled on this context.
452 * Waits till any outstanding processing completes.
453 */
454static inline void napi_disable(struct napi_struct *n)
455{
456 set_bit(NAPI_STATE_DISABLE, &n->state);
457 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
458 msleep(1);
459 clear_bit(NAPI_STATE_DISABLE, &n->state);
460}
461
462/**
463 * napi_enable - enable NAPI scheduling
464 * @n: napi context
465 *
466 * Resume NAPI from being scheduled on this context.
467 * Must be paired with napi_disable.
468 */
469static inline void napi_enable(struct napi_struct *n)
470{
471 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
472 smp_mb__before_clear_bit();
473 clear_bit(NAPI_STATE_SCHED, &n->state);
474}
475
476#ifdef CONFIG_SMP
477/**
478 * napi_synchronize - wait until NAPI is not running
479 * @n: napi context
480 *
481 * Wait until NAPI is done being scheduled on this context.
482 * Waits till any outstanding processing completes but
483 * does not disable future activations.
484 */
485static inline void napi_synchronize(const struct napi_struct *n)
486{
487 while (test_bit(NAPI_STATE_SCHED, &n->state))
488 msleep(1);
489}
490#else
491# define napi_synchronize(n) barrier()
492#endif
493
494enum netdev_queue_state_t {
495 __QUEUE_STATE_XOFF,
496 __QUEUE_STATE_FROZEN,
497};
498
499struct netdev_queue {
500/*
501 * read mostly part
502 */
503 struct net_device *dev;
504 struct Qdisc *qdisc;
505 unsigned long state;
506 struct Qdisc *qdisc_sleeping;
507/*
508 * write mostly part
509 */
510 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
511 int xmit_lock_owner;
512 /*
513 * please use this field instead of dev->trans_start
514 */
515 unsigned long trans_start;
516 unsigned long tx_bytes;
517 unsigned long tx_packets;
518 unsigned long tx_dropped;
519} ____cacheline_aligned_in_smp;
520
521
522/*
523 * This structure defines the management hooks for network devices.
524 * The following hooks can be defined; unless noted otherwise, they are
525 * optional and can be filled with a null pointer.
526 *
527 * int (*ndo_init)(struct net_device *dev);
528 * This function is called once when network device is registered.
529 * The network device can use this to any late stage initializaton
530 * or semantic validattion. It can fail with an error code which will
531 * be propogated back to register_netdev
532 *
533 * void (*ndo_uninit)(struct net_device *dev);
534 * This function is called when device is unregistered or when registration
535 * fails. It is not called if init fails.
536 *
537 * int (*ndo_open)(struct net_device *dev);
538 * This function is called when network device transistions to the up
539 * state.
540 *
541 * int (*ndo_stop)(struct net_device *dev);
542 * This function is called when network device transistions to the down
543 * state.
544 *
545 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
546 * struct net_device *dev);
547 * Called when a packet needs to be transmitted.
548 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
549 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
550 * Required can not be NULL.
551 *
552 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
553 * Called to decide which queue to when device supports multiple
554 * transmit queues.
555 *
556 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
557 * This function is called to allow device receiver to make
558 * changes to configuration when multicast or promiscious is enabled.
559 *
560 * void (*ndo_set_rx_mode)(struct net_device *dev);
561 * This function is called device changes address list filtering.
562 *
563 * void (*ndo_set_multicast_list)(struct net_device *dev);
564 * This function is called when the multicast address list changes.
565 *
566 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
567 * This function is called when the Media Access Control address
568 * needs to be changed. If this interface is not defined, the
569 * mac address can not be changed.
570 *
571 * int (*ndo_validate_addr)(struct net_device *dev);
572 * Test if Media Access Control address is valid for the device.
573 *
574 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
575 * Called when a user request an ioctl which can't be handled by
576 * the generic interface code. If not defined ioctl's return
577 * not supported error code.
578 *
579 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
580 * Used to set network devices bus interface parameters. This interface
581 * is retained for legacy reason, new devices should use the bus
582 * interface (PCI) for low level management.
583 *
584 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
585 * Called when a user wants to change the Maximum Transfer Unit
586 * of a device. If not defined, any request to change MTU will
587 * will return an error.
588 *
589 * void (*ndo_tx_timeout)(struct net_device *dev);
590 * Callback uses when the transmitter has not made any progress
591 * for dev->watchdog ticks.
592 *
593 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
594 * Called when a user wants to get the network device usage
595 * statistics. If not defined, the counters in dev->stats will
596 * be used.
597 *
598 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
599 * If device support VLAN receive accleration
600 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
601 * when vlan groups for the device changes. Note: grp is NULL
602 * if no vlan's groups are being used.
603 *
604 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
605 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
606 * this function is called when a VLAN id is registered.
607 *
608 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
609 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
610 * this function is called when a VLAN id is unregistered.
611 *
612 * void (*ndo_poll_controller)(struct net_device *dev);
613 */
614#define HAVE_NET_DEVICE_OPS
615struct net_device_ops {
616 int (*ndo_init)(struct net_device *dev);
617 void (*ndo_uninit)(struct net_device *dev);
618 int (*ndo_open)(struct net_device *dev);
619 int (*ndo_stop)(struct net_device *dev);
620 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
621 struct net_device *dev);
622 u16 (*ndo_select_queue)(struct net_device *dev,
623 struct sk_buff *skb);
624#define HAVE_CHANGE_RX_FLAGS
625 void (*ndo_change_rx_flags)(struct net_device *dev,
626 int flags);
627#define HAVE_SET_RX_MODE
628 void (*ndo_set_rx_mode)(struct net_device *dev);
629#define HAVE_MULTICAST
630 void (*ndo_set_multicast_list)(struct net_device *dev);
631#define HAVE_SET_MAC_ADDR
632 int (*ndo_set_mac_address)(struct net_device *dev,
633 void *addr);
634#define HAVE_VALIDATE_ADDR
635 int (*ndo_validate_addr)(struct net_device *dev);
636#define HAVE_PRIVATE_IOCTL
637 int (*ndo_do_ioctl)(struct net_device *dev,
638 struct ifreq *ifr, int cmd);
639#define HAVE_SET_CONFIG
640 int (*ndo_set_config)(struct net_device *dev,
641 struct ifmap *map);
642#define HAVE_CHANGE_MTU
643 int (*ndo_change_mtu)(struct net_device *dev,
644 int new_mtu);
645 int (*ndo_neigh_setup)(struct net_device *dev,
646 struct neigh_parms *);
647#define HAVE_TX_TIMEOUT
648 void (*ndo_tx_timeout) (struct net_device *dev);
649
650 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
651
652 void (*ndo_vlan_rx_register)(struct net_device *dev,
653 struct vlan_group *grp);
654 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
655 unsigned short vid);
656 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
657 unsigned short vid);
658#ifdef CONFIG_NET_POLL_CONTROLLER
659#define HAVE_NETDEV_POLL
660 void (*ndo_poll_controller)(struct net_device *dev);
661#endif
662#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
663 int (*ndo_fcoe_enable)(struct net_device *dev);
664 int (*ndo_fcoe_disable)(struct net_device *dev);
665 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
666 u16 xid,
667 struct scatterlist *sgl,
668 unsigned int sgc);
669 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
670 u16 xid);
671#define NETDEV_FCOE_WWNN 0
672#define NETDEV_FCOE_WWPN 1
673 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
674 u64 *wwn, int type);
675#endif
676};
677
678/*
679 * The DEVICE structure.
680 * Actually, this whole structure is a big mistake. It mixes I/O
681 * data with strictly "high-level" data, and it has to know about
682 * almost every data structure used in the INET module.
683 *
684 * FIXME: cleanup struct net_device such that network protocol info
685 * moves out.
686 */
687
688struct net_device {
689
690 /*
691 * This is the first field of the "visible" part of this structure
692 * (i.e. as seen by users in the "Space.c" file). It is the name
693 * the interface.
694 */
695 char name[IFNAMSIZ];
696 /* device name hash chain */
697 struct hlist_node name_hlist;
698 /* snmp alias */
699 char *ifalias;
700
701 /*
702 * I/O specific fields
703 * FIXME: Merge these and struct ifmap into one
704 */
705 unsigned long mem_end; /* shared mem end */
706 unsigned long mem_start; /* shared mem start */
707 unsigned long base_addr; /* device I/O address */
708 unsigned int irq; /* device IRQ number */
709
710 /*
711 * Some hardware also needs these fields, but they are not
712 * part of the usual set specified in Space.c.
713 */
714
715 unsigned char if_port; /* Selectable AUI, TP,..*/
716 unsigned char dma; /* DMA channel */
717
718 unsigned long state;
719
720 struct list_head dev_list;
721 struct list_head napi_list;
722 struct list_head unreg_list;
723
724 /* Net device features */
725 unsigned long features;
726#define NETIF_F_SG 1 /* Scatter/gather IO. */
727#define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
728#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
729#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
730#define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
731#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
732#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
733#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
734#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
735#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
736#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
737#define NETIF_F_GSO 2048 /* Enable software GSO. */
738#define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
739 /* do not use LLTX in new drivers */
740#define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
741#define NETIF_F_GRO 16384 /* Generic receive offload */
742#define NETIF_F_LRO 32768 /* large receive offload */
743
744/* the GSO_MASK reserves bits 16 through 23 */
745#define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
746#define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
747#define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
748
749 /* Segmentation offload features */
750#define NETIF_F_GSO_SHIFT 16
751#define NETIF_F_GSO_MASK 0x00ff0000
752#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
753#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
754#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
755#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
756#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
757#define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
758
759 /* List of features with software fallbacks. */
760#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
761
762
763#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
764#define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
765#define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
766#define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
767
768 /*
769 * If one device supports one of these features, then enable them
770 * for all in netdev_increment_features.
771 */
772#define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
773 NETIF_F_SG | NETIF_F_HIGHDMA | \
774 NETIF_F_FRAGLIST)
775
776 /* Interface index. Unique device identifier */
777 int ifindex;
778 int iflink;
779
780 struct net_device_stats stats;
781
782#ifdef CONFIG_WIRELESS_EXT
783 /* List of functions to handle Wireless Extensions (instead of ioctl).
784 * See <net/iw_handler.h> for details. Jean II */
785 const struct iw_handler_def * wireless_handlers;
786 /* Instance data managed by the core of Wireless Extensions. */
787 struct iw_public_data * wireless_data;
788#endif
789 /* Management operations */
790 const struct net_device_ops *netdev_ops;
791 const struct ethtool_ops *ethtool_ops;
792
793 /* Hardware header description */
794 const struct header_ops *header_ops;
795
796 unsigned int flags; /* interface flags (a la BSD) */
797 unsigned short gflags;
798 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
799 unsigned short padded; /* How much padding added by alloc_netdev() */
800
801 unsigned char operstate; /* RFC2863 operstate */
802 unsigned char link_mode; /* mapping policy to operstate */
803
804 unsigned mtu; /* interface MTU value */
805 unsigned short type; /* interface hardware type */
806 unsigned short hard_header_len; /* hardware hdr length */
807
808 /* extra head- and tailroom the hardware may need, but not in all cases
809 * can this be guaranteed, especially tailroom. Some cases also use
810 * LL_MAX_HEADER instead to allocate the skb.
811 */
812 unsigned short needed_headroom;
813 unsigned short needed_tailroom;
814
815 struct net_device *master; /* Pointer to master device of a group,
816 * which this device is member of.
817 */
818
819 /* Interface address info. */
820 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
821 unsigned char addr_len; /* hardware address length */
822 unsigned short dev_id; /* for shared network cards */
823
824 struct netdev_hw_addr_list uc; /* Secondary unicast
825 mac addresses */
826 int uc_promisc;
827 spinlock_t addr_list_lock;
828 struct dev_addr_list *mc_list; /* Multicast mac addresses */
829 int mc_count; /* Number of installed mcasts */
830 unsigned int promiscuity;
831 unsigned int allmulti;
832
833
834 /* Protocol specific pointers */
835
836#ifdef CONFIG_NET_DSA
837 void *dsa_ptr; /* dsa specific data */
838#endif
839 void *atalk_ptr; /* AppleTalk link */
840 void *ip_ptr; /* IPv4 specific data */
841 void *dn_ptr; /* DECnet specific data */
842 void *ip6_ptr; /* IPv6 specific data */
843 void *ec_ptr; /* Econet specific data */
844 void *ax25_ptr; /* AX.25 specific data */
845 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
846 assign before registering */
847
848/*
849 * Cache line mostly used on receive path (including eth_type_trans())
850 */
851 unsigned long last_rx; /* Time of last Rx */
852 /* Interface address info used in eth_type_trans() */
853 unsigned char *dev_addr; /* hw address, (before bcast
854 because most packets are
855 unicast) */
856
857 struct netdev_hw_addr_list dev_addrs; /* list of device
858 hw addresses */
859
860 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
861
862 struct netdev_queue rx_queue;
863
864 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
865
866 /* Number of TX queues allocated at alloc_netdev_mq() time */
867 unsigned int num_tx_queues;
868
869 /* Number of TX queues currently active in device */
870 unsigned int real_num_tx_queues;
871
872 /* root qdisc from userspace point of view */
873 struct Qdisc *qdisc;
874
875 unsigned long tx_queue_len; /* Max frames per queue allowed */
876 spinlock_t tx_global_lock;
877/*
878 * One part is mostly used on xmit path (device)
879 */
880 /* These may be needed for future network-power-down code. */
881
882 /*
883 * trans_start here is expensive for high speed devices on SMP,
884 * please use netdev_queue->trans_start instead.
885 */
886 unsigned long trans_start; /* Time (in jiffies) of last Tx */
887
888 int watchdog_timeo; /* used by dev_watchdog() */
889 struct timer_list watchdog_timer;
890
891 /* Number of references to this device */
892 atomic_t refcnt ____cacheline_aligned_in_smp;
893
894 /* delayed register/unregister */
895 struct list_head todo_list;
896 /* device index hash chain */
897 struct hlist_node index_hlist;
898
899 struct list_head link_watch_list;
900
901 /* register/unregister state machine */
902 enum { NETREG_UNINITIALIZED=0,
903 NETREG_REGISTERED, /* completed register_netdevice */
904 NETREG_UNREGISTERING, /* called unregister_netdevice */
905 NETREG_UNREGISTERED, /* completed unregister todo */
906 NETREG_RELEASED, /* called free_netdev */
907 NETREG_DUMMY, /* dummy device for NAPI poll */
908 } reg_state;
909
910 /* Called from unregister, can be used to call free_netdev */
911 void (*destructor)(struct net_device *dev);
912
913#ifdef CONFIG_NETPOLL
914 struct netpoll_info *npinfo;
915#endif
916
917#ifdef CONFIG_NET_NS
918 /* Network namespace this network device is inside */
919 struct net *nd_net;
920#endif
921
922 /* mid-layer private */
923 void *ml_priv;
924
925 /* bridge stuff */
926 struct net_bridge_port *br_port;
927 /* macvlan */
928 struct macvlan_port *macvlan_port;
929 /* GARP */
930 struct garp_port *garp_port;
931
932 /* class/net/name entry */
933 struct device dev;
934 /* space for optional device, statistics, and wireless sysfs groups */
935 const struct attribute_group *sysfs_groups[4];
936
937 /* rtnetlink link ops */
938 const struct rtnl_link_ops *rtnl_link_ops;
939
940 /* VLAN feature mask */
941 unsigned long vlan_features;
942
943 /* for setting kernel sock attribute on TCP connection setup */
944#define GSO_MAX_SIZE 65536
945 unsigned int gso_max_size;
946
947#ifdef CONFIG_DCB
948 /* Data Center Bridging netlink ops */
949 const struct dcbnl_rtnl_ops *dcbnl_ops;
950#endif
951
952#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
953 /* max exchange id for FCoE LRO by ddp */
954 unsigned int fcoe_ddp_xid;
955#endif
956};
957#define to_net_dev(d) container_of(d, struct net_device, dev)
958
959#define NETDEV_ALIGN 32
960
961static inline
962struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
963 unsigned int index)
964{
965 return &dev->_tx[index];
966}
967
968static inline void netdev_for_each_tx_queue(struct net_device *dev,
969 void (*f)(struct net_device *,
970 struct netdev_queue *,
971 void *),
972 void *arg)
973{
974 unsigned int i;
975
976 for (i = 0; i < dev->num_tx_queues; i++)
977 f(dev, &dev->_tx[i], arg);
978}
979
980/*
981 * Net namespace inlines
982 */
983static inline
984struct net *dev_net(const struct net_device *dev)
985{
986#ifdef CONFIG_NET_NS
987 return dev->nd_net;
988#else
989 return &init_net;
990#endif
991}
992
993static inline
994void dev_net_set(struct net_device *dev, struct net *net)
995{
996#ifdef CONFIG_NET_NS
997 release_net(dev->nd_net);
998 dev->nd_net = hold_net(net);
999#endif
1000}
1001
1002static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1003{
1004#ifdef CONFIG_NET_DSA_TAG_DSA
1005 if (dev->dsa_ptr != NULL)
1006 return dsa_uses_dsa_tags(dev->dsa_ptr);
1007#endif
1008
1009 return 0;
1010}
1011
1012static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1013{
1014#ifdef CONFIG_NET_DSA_TAG_TRAILER
1015 if (dev->dsa_ptr != NULL)
1016 return dsa_uses_trailer_tags(dev->dsa_ptr);
1017#endif
1018
1019 return 0;
1020}
1021
1022/**
1023 * netdev_priv - access network device private data
1024 * @dev: network device
1025 *
1026 * Get network device private data
1027 */
1028static inline void *netdev_priv(const struct net_device *dev)
1029{
1030 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1031}
1032
1033/* Set the sysfs physical device reference for the network logical device
1034 * if set prior to registration will cause a symlink during initialization.
1035 */
1036#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1037
1038/* Set the sysfs device type for the network logical device to allow
1039 * fin grained indentification of different network device types. For
1040 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1041 */
1042#define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1043
1044/**
1045 * netif_napi_add - initialize a napi context
1046 * @dev: network device
1047 * @napi: napi context
1048 * @poll: polling function
1049 * @weight: default weight
1050 *
1051 * netif_napi_add() must be used to initialize a napi context prior to calling
1052 * *any* of the other napi related functions.
1053 */
1054void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1055 int (*poll)(struct napi_struct *, int), int weight);
1056
1057/**
1058 * netif_napi_del - remove a napi context
1059 * @napi: napi context
1060 *
1061 * netif_napi_del() removes a napi context from the network device napi list
1062 */
1063void netif_napi_del(struct napi_struct *napi);
1064
1065struct napi_gro_cb {
1066 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1067 void *frag0;
1068
1069 /* Length of frag0. */
1070 unsigned int frag0_len;
1071
1072 /* This indicates where we are processing relative to skb->data. */
1073 int data_offset;
1074
1075 /* This is non-zero if the packet may be of the same flow. */
1076 int same_flow;
1077
1078 /* This is non-zero if the packet cannot be merged with the new skb. */
1079 int flush;
1080
1081 /* Number of segments aggregated. */
1082 int count;
1083
1084 /* Free the skb? */
1085 int free;
1086};
1087
1088#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1089
1090struct packet_type {
1091 __be16 type; /* This is really htons(ether_type). */
1092 struct net_device *dev; /* NULL is wildcarded here */
1093 int (*func) (struct sk_buff *,
1094 struct net_device *,
1095 struct packet_type *,
1096 struct net_device *);
1097 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1098 int features);
1099 int (*gso_send_check)(struct sk_buff *skb);
1100 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1101 struct sk_buff *skb);
1102 int (*gro_complete)(struct sk_buff *skb);
1103 void *af_packet_priv;
1104 struct list_head list;
1105};
1106
1107#include <linux/interrupt.h>
1108#include <linux/notifier.h>
1109
1110extern rwlock_t dev_base_lock; /* Device list lock */
1111
1112
1113#define for_each_netdev(net, d) \
1114 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1115#define for_each_netdev_rcu(net, d) \
1116 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1117#define for_each_netdev_safe(net, d, n) \
1118 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1119#define for_each_netdev_continue(net, d) \
1120 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1121#define for_each_netdev_continue_rcu(net, d) \
1122 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1123#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1124
1125static inline struct net_device *next_net_device(struct net_device *dev)
1126{
1127 struct list_head *lh;
1128 struct net *net;
1129
1130 net = dev_net(dev);
1131 lh = dev->dev_list.next;
1132 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1133}
1134
1135static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1136{
1137 struct list_head *lh;
1138 struct net *net;
1139
1140 net = dev_net(dev);
1141 lh = rcu_dereference(dev->dev_list.next);
1142 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1143}
1144
1145static inline struct net_device *first_net_device(struct net *net)
1146{
1147 return list_empty(&net->dev_base_head) ? NULL :
1148 net_device_entry(net->dev_base_head.next);
1149}
1150
1151extern int netdev_boot_setup_check(struct net_device *dev);
1152extern unsigned long netdev_boot_base(const char *prefix, int unit);
1153extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1154extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1155extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1156extern void dev_add_pack(struct packet_type *pt);
1157extern void dev_remove_pack(struct packet_type *pt);
1158extern void __dev_remove_pack(struct packet_type *pt);
1159
1160extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1161 unsigned short mask);
1162extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1163extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1164extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1165extern int dev_alloc_name(struct net_device *dev, const char *name);
1166extern int dev_open(struct net_device *dev);
1167extern int dev_close(struct net_device *dev);
1168extern void dev_disable_lro(struct net_device *dev);
1169extern int dev_queue_xmit(struct sk_buff *skb);
1170extern int register_netdevice(struct net_device *dev);
1171extern void unregister_netdevice_queue(struct net_device *dev,
1172 struct list_head *head);
1173extern void unregister_netdevice_many(struct list_head *head);
1174static inline void unregister_netdevice(struct net_device *dev)
1175{
1176 unregister_netdevice_queue(dev, NULL);
1177}
1178
1179extern void free_netdev(struct net_device *dev);
1180extern void synchronize_net(void);
1181extern int register_netdevice_notifier(struct notifier_block *nb);
1182extern int unregister_netdevice_notifier(struct notifier_block *nb);
1183extern int init_dummy_netdev(struct net_device *dev);
1184extern void netdev_resync_ops(struct net_device *dev);
1185
1186extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1187extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1188extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1189extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1190extern int dev_restart(struct net_device *dev);
1191#ifdef CONFIG_NETPOLL_TRAP
1192extern int netpoll_trap(void);
1193#endif
1194extern int skb_gro_receive(struct sk_buff **head,
1195 struct sk_buff *skb);
1196extern void skb_gro_reset_offset(struct sk_buff *skb);
1197
1198static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1199{
1200 return NAPI_GRO_CB(skb)->data_offset;
1201}
1202
1203static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1204{
1205 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1206}
1207
1208static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1209{
1210 NAPI_GRO_CB(skb)->data_offset += len;
1211}
1212
1213static inline void *skb_gro_header_fast(struct sk_buff *skb,
1214 unsigned int offset)
1215{
1216 return NAPI_GRO_CB(skb)->frag0 + offset;
1217}
1218
1219static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1220{
1221 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1222}
1223
1224static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1225 unsigned int offset)
1226{
1227 NAPI_GRO_CB(skb)->frag0 = NULL;
1228 NAPI_GRO_CB(skb)->frag0_len = 0;
1229 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1230}
1231
1232static inline void *skb_gro_mac_header(struct sk_buff *skb)
1233{
1234 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1235}
1236
1237static inline void *skb_gro_network_header(struct sk_buff *skb)
1238{
1239 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1240 skb_network_offset(skb);
1241}
1242
1243static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1244 unsigned short type,
1245 const void *daddr, const void *saddr,
1246 unsigned len)
1247{
1248 if (!dev->header_ops || !dev->header_ops->create)
1249 return 0;
1250
1251 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1252}
1253
1254static inline int dev_parse_header(const struct sk_buff *skb,
1255 unsigned char *haddr)
1256{
1257 const struct net_device *dev = skb->dev;
1258
1259 if (!dev->header_ops || !dev->header_ops->parse)
1260 return 0;
1261 return dev->header_ops->parse(skb, haddr);
1262}
1263
1264typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1265extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1266static inline int unregister_gifconf(unsigned int family)
1267{
1268 return register_gifconf(family, NULL);
1269}
1270
1271/*
1272 * Incoming packets are placed on per-cpu queues so that
1273 * no locking is needed.
1274 */
1275struct softnet_data {
1276 struct Qdisc *output_queue;
1277 struct sk_buff_head input_pkt_queue;
1278 struct list_head poll_list;
1279 struct sk_buff *completion_queue;
1280
1281 struct napi_struct backlog;
1282};
1283
1284DECLARE_PER_CPU(struct softnet_data,softnet_data);
1285
1286#define HAVE_NETIF_QUEUE
1287
1288extern void __netif_schedule(struct Qdisc *q);
1289
1290static inline void netif_schedule_queue(struct netdev_queue *txq)
1291{
1292 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1293 __netif_schedule(txq->qdisc);
1294}
1295
1296static inline void netif_tx_schedule_all(struct net_device *dev)
1297{
1298 unsigned int i;
1299
1300 for (i = 0; i < dev->num_tx_queues; i++)
1301 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1302}
1303
1304static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1305{
1306 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1307}
1308
1309/**
1310 * netif_start_queue - allow transmit
1311 * @dev: network device
1312 *
1313 * Allow upper layers to call the device hard_start_xmit routine.
1314 */
1315static inline void netif_start_queue(struct net_device *dev)
1316{
1317 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1318}
1319
1320static inline void netif_tx_start_all_queues(struct net_device *dev)
1321{
1322 unsigned int i;
1323
1324 for (i = 0; i < dev->num_tx_queues; i++) {
1325 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1326 netif_tx_start_queue(txq);
1327 }
1328}
1329
1330static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1331{
1332#ifdef CONFIG_NETPOLL_TRAP
1333 if (netpoll_trap()) {
1334 netif_tx_start_queue(dev_queue);
1335 return;
1336 }
1337#endif
1338 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1339 __netif_schedule(dev_queue->qdisc);
1340}
1341
1342/**
1343 * netif_wake_queue - restart transmit
1344 * @dev: network device
1345 *
1346 * Allow upper layers to call the device hard_start_xmit routine.
1347 * Used for flow control when transmit resources are available.
1348 */
1349static inline void netif_wake_queue(struct net_device *dev)
1350{
1351 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1352}
1353
1354static inline void netif_tx_wake_all_queues(struct net_device *dev)
1355{
1356 unsigned int i;
1357
1358 for (i = 0; i < dev->num_tx_queues; i++) {
1359 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1360 netif_tx_wake_queue(txq);
1361 }
1362}
1363
1364static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1365{
1366 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1367}
1368
1369/**
1370 * netif_stop_queue - stop transmitted packets
1371 * @dev: network device
1372 *
1373 * Stop upper layers calling the device hard_start_xmit routine.
1374 * Used for flow control when transmit resources are unavailable.
1375 */
1376static inline void netif_stop_queue(struct net_device *dev)
1377{
1378 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1379}
1380
1381static inline void netif_tx_stop_all_queues(struct net_device *dev)
1382{
1383 unsigned int i;
1384
1385 for (i = 0; i < dev->num_tx_queues; i++) {
1386 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1387 netif_tx_stop_queue(txq);
1388 }
1389}
1390
1391static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1392{
1393 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1394}
1395
1396/**
1397 * netif_queue_stopped - test if transmit queue is flowblocked
1398 * @dev: network device
1399 *
1400 * Test if transmit queue on device is currently unable to send.
1401 */
1402static inline int netif_queue_stopped(const struct net_device *dev)
1403{
1404 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1405}
1406
1407static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1408{
1409 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1410}
1411
1412/**
1413 * netif_running - test if up
1414 * @dev: network device
1415 *
1416 * Test if the device has been brought up.
1417 */
1418static inline int netif_running(const struct net_device *dev)
1419{
1420 return test_bit(__LINK_STATE_START, &dev->state);
1421}
1422
1423/*
1424 * Routines to manage the subqueues on a device. We only need start
1425 * stop, and a check if it's stopped. All other device management is
1426 * done at the overall netdevice level.
1427 * Also test the device if we're multiqueue.
1428 */
1429
1430/**
1431 * netif_start_subqueue - allow sending packets on subqueue
1432 * @dev: network device
1433 * @queue_index: sub queue index
1434 *
1435 * Start individual transmit queue of a device with multiple transmit queues.
1436 */
1437static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1438{
1439 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1440
1441 netif_tx_start_queue(txq);
1442}
1443
1444/**
1445 * netif_stop_subqueue - stop sending packets on subqueue
1446 * @dev: network device
1447 * @queue_index: sub queue index
1448 *
1449 * Stop individual transmit queue of a device with multiple transmit queues.
1450 */
1451static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1452{
1453 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1454#ifdef CONFIG_NETPOLL_TRAP
1455 if (netpoll_trap())
1456 return;
1457#endif
1458 netif_tx_stop_queue(txq);
1459}
1460
1461/**
1462 * netif_subqueue_stopped - test status of subqueue
1463 * @dev: network device
1464 * @queue_index: sub queue index
1465 *
1466 * Check individual transmit queue of a device with multiple transmit queues.
1467 */
1468static inline int __netif_subqueue_stopped(const struct net_device *dev,
1469 u16 queue_index)
1470{
1471 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1472
1473 return netif_tx_queue_stopped(txq);
1474}
1475
1476static inline int netif_subqueue_stopped(const struct net_device *dev,
1477 struct sk_buff *skb)
1478{
1479 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1480}
1481
1482/**
1483 * netif_wake_subqueue - allow sending packets on subqueue
1484 * @dev: network device
1485 * @queue_index: sub queue index
1486 *
1487 * Resume individual transmit queue of a device with multiple transmit queues.
1488 */
1489static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1490{
1491 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1492#ifdef CONFIG_NETPOLL_TRAP
1493 if (netpoll_trap())
1494 return;
1495#endif
1496 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1497 __netif_schedule(txq->qdisc);
1498}
1499
1500/**
1501 * netif_is_multiqueue - test if device has multiple transmit queues
1502 * @dev: network device
1503 *
1504 * Check if device has multiple transmit queues
1505 */
1506static inline int netif_is_multiqueue(const struct net_device *dev)
1507{
1508 return (dev->num_tx_queues > 1);
1509}
1510
1511/* Use this variant when it is known for sure that it
1512 * is executing from hardware interrupt context or with hardware interrupts
1513 * disabled.
1514 */
1515extern void dev_kfree_skb_irq(struct sk_buff *skb);
1516
1517/* Use this variant in places where it could be invoked
1518 * from either hardware interrupt or other context, with hardware interrupts
1519 * either disabled or enabled.
1520 */
1521extern void dev_kfree_skb_any(struct sk_buff *skb);
1522
1523#define HAVE_NETIF_RX 1
1524extern int netif_rx(struct sk_buff *skb);
1525extern int netif_rx_ni(struct sk_buff *skb);
1526#define HAVE_NETIF_RECEIVE_SKB 1
1527extern int netif_receive_skb(struct sk_buff *skb);
1528extern void napi_gro_flush(struct napi_struct *napi);
1529extern gro_result_t dev_gro_receive(struct napi_struct *napi,
1530 struct sk_buff *skb);
1531extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1532extern gro_result_t napi_gro_receive(struct napi_struct *napi,
1533 struct sk_buff *skb);
1534extern void napi_reuse_skb(struct napi_struct *napi,
1535 struct sk_buff *skb);
1536extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1537extern gro_result_t napi_frags_finish(struct napi_struct *napi,
1538 struct sk_buff *skb,
1539 gro_result_t ret);
1540extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1541extern gro_result_t napi_gro_frags(struct napi_struct *napi);
1542
1543static inline void napi_free_frags(struct napi_struct *napi)
1544{
1545 kfree_skb(napi->skb);
1546 napi->skb = NULL;
1547}
1548
1549extern void netif_nit_deliver(struct sk_buff *skb);
1550extern int dev_valid_name(const char *name);
1551extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1552extern int dev_ethtool(struct net *net, struct ifreq *);
1553extern unsigned dev_get_flags(const struct net_device *);
1554extern int dev_change_flags(struct net_device *, unsigned);
1555extern int dev_change_name(struct net_device *, const char *);
1556extern int dev_set_alias(struct net_device *, const char *, size_t);
1557extern int dev_change_net_namespace(struct net_device *,
1558 struct net *, const char *);
1559extern int dev_set_mtu(struct net_device *, int);
1560extern int dev_set_mac_address(struct net_device *,
1561 struct sockaddr *);
1562extern int dev_hard_start_xmit(struct sk_buff *skb,
1563 struct net_device *dev,
1564 struct netdev_queue *txq);
1565extern int dev_forward_skb(struct net_device *dev,
1566 struct sk_buff *skb);
1567
1568extern int netdev_budget;
1569
1570/* Called by rtnetlink.c:rtnl_unlock() */
1571extern void netdev_run_todo(void);
1572
1573/**
1574 * dev_put - release reference to device
1575 * @dev: network device
1576 *
1577 * Release reference to device to allow it to be freed.
1578 */
1579static inline void dev_put(struct net_device *dev)
1580{
1581 atomic_dec(&dev->refcnt);
1582}
1583
1584/**
1585 * dev_hold - get reference to device
1586 * @dev: network device
1587 *
1588 * Hold reference to device to keep it from being freed.
1589 */
1590static inline void dev_hold(struct net_device *dev)
1591{
1592 atomic_inc(&dev->refcnt);
1593}
1594
1595/* Carrier loss detection, dial on demand. The functions netif_carrier_on
1596 * and _off may be called from IRQ context, but it is caller
1597 * who is responsible for serialization of these calls.
1598 *
1599 * The name carrier is inappropriate, these functions should really be
1600 * called netif_lowerlayer_*() because they represent the state of any
1601 * kind of lower layer not just hardware media.
1602 */
1603
1604extern void linkwatch_fire_event(struct net_device *dev);
1605extern void linkwatch_forget_dev(struct net_device *dev);
1606
1607/**
1608 * netif_carrier_ok - test if carrier present
1609 * @dev: network device
1610 *
1611 * Check if carrier is present on device
1612 */
1613static inline int netif_carrier_ok(const struct net_device *dev)
1614{
1615 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1616}
1617
1618extern unsigned long dev_trans_start(struct net_device *dev);
1619
1620extern void __netdev_watchdog_up(struct net_device *dev);
1621
1622extern void netif_carrier_on(struct net_device *dev);
1623
1624extern void netif_carrier_off(struct net_device *dev);
1625
1626/**
1627 * netif_dormant_on - mark device as dormant.
1628 * @dev: network device
1629 *
1630 * Mark device as dormant (as per RFC2863).
1631 *
1632 * The dormant state indicates that the relevant interface is not
1633 * actually in a condition to pass packets (i.e., it is not 'up') but is
1634 * in a "pending" state, waiting for some external event. For "on-
1635 * demand" interfaces, this new state identifies the situation where the
1636 * interface is waiting for events to place it in the up state.
1637 *
1638 */
1639static inline void netif_dormant_on(struct net_device *dev)
1640{
1641 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1642 linkwatch_fire_event(dev);
1643}
1644
1645/**
1646 * netif_dormant_off - set device as not dormant.
1647 * @dev: network device
1648 *
1649 * Device is not in dormant state.
1650 */
1651static inline void netif_dormant_off(struct net_device *dev)
1652{
1653 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1654 linkwatch_fire_event(dev);
1655}
1656
1657/**
1658 * netif_dormant - test if carrier present
1659 * @dev: network device
1660 *
1661 * Check if carrier is present on device
1662 */
1663static inline int netif_dormant(const struct net_device *dev)
1664{
1665 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1666}
1667
1668
1669/**
1670 * netif_oper_up - test if device is operational
1671 * @dev: network device
1672 *
1673 * Check if carrier is operational
1674 */
1675static inline int netif_oper_up(const struct net_device *dev)
1676{
1677 return (dev->operstate == IF_OPER_UP ||
1678 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1679}
1680
1681/**
1682 * netif_device_present - is device available or removed
1683 * @dev: network device
1684 *
1685 * Check if device has not been removed from system.
1686 */
1687static inline int netif_device_present(struct net_device *dev)
1688{
1689 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1690}
1691
1692extern void netif_device_detach(struct net_device *dev);
1693
1694extern void netif_device_attach(struct net_device *dev);
1695
1696/*
1697 * Network interface message level settings
1698 */
1699#define HAVE_NETIF_MSG 1
1700
1701enum {
1702 NETIF_MSG_DRV = 0x0001,
1703 NETIF_MSG_PROBE = 0x0002,
1704 NETIF_MSG_LINK = 0x0004,
1705 NETIF_MSG_TIMER = 0x0008,
1706 NETIF_MSG_IFDOWN = 0x0010,
1707 NETIF_MSG_IFUP = 0x0020,
1708 NETIF_MSG_RX_ERR = 0x0040,
1709 NETIF_MSG_TX_ERR = 0x0080,
1710 NETIF_MSG_TX_QUEUED = 0x0100,
1711 NETIF_MSG_INTR = 0x0200,
1712 NETIF_MSG_TX_DONE = 0x0400,
1713 NETIF_MSG_RX_STATUS = 0x0800,
1714 NETIF_MSG_PKTDATA = 0x1000,
1715 NETIF_MSG_HW = 0x2000,
1716 NETIF_MSG_WOL = 0x4000,
1717};
1718
1719#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1720#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1721#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1722#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1723#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1724#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1725#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1726#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1727#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1728#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1729#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1730#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1731#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1732#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1733#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1734
1735static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1736{
1737 /* use default */
1738 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1739 return default_msg_enable_bits;
1740 if (debug_value == 0) /* no output */
1741 return 0;
1742 /* set low N bits */
1743 return (1 << debug_value) - 1;
1744}
1745
1746static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1747{
1748 spin_lock(&txq->_xmit_lock);
1749 txq->xmit_lock_owner = cpu;
1750}
1751
1752static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1753{
1754 spin_lock_bh(&txq->_xmit_lock);
1755 txq->xmit_lock_owner = smp_processor_id();
1756}
1757
1758static inline int __netif_tx_trylock(struct netdev_queue *txq)
1759{
1760 int ok = spin_trylock(&txq->_xmit_lock);
1761 if (likely(ok))
1762 txq->xmit_lock_owner = smp_processor_id();
1763 return ok;
1764}
1765
1766static inline void __netif_tx_unlock(struct netdev_queue *txq)
1767{
1768 txq->xmit_lock_owner = -1;
1769 spin_unlock(&txq->_xmit_lock);
1770}
1771
1772static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1773{
1774 txq->xmit_lock_owner = -1;
1775 spin_unlock_bh(&txq->_xmit_lock);
1776}
1777
1778static inline void txq_trans_update(struct netdev_queue *txq)
1779{
1780 if (txq->xmit_lock_owner != -1)
1781 txq->trans_start = jiffies;
1782}
1783
1784/**
1785 * netif_tx_lock - grab network device transmit lock
1786 * @dev: network device
1787 *
1788 * Get network device transmit lock
1789 */
1790static inline void netif_tx_lock(struct net_device *dev)
1791{
1792 unsigned int i;
1793 int cpu;
1794
1795 spin_lock(&dev->tx_global_lock);
1796 cpu = smp_processor_id();
1797 for (i = 0; i < dev->num_tx_queues; i++) {
1798 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1799
1800 /* We are the only thread of execution doing a
1801 * freeze, but we have to grab the _xmit_lock in
1802 * order to synchronize with threads which are in
1803 * the ->hard_start_xmit() handler and already
1804 * checked the frozen bit.
1805 */
1806 __netif_tx_lock(txq, cpu);
1807 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1808 __netif_tx_unlock(txq);
1809 }
1810}
1811
1812static inline void netif_tx_lock_bh(struct net_device *dev)
1813{
1814 local_bh_disable();
1815 netif_tx_lock(dev);
1816}
1817
1818static inline void netif_tx_unlock(struct net_device *dev)
1819{
1820 unsigned int i;
1821
1822 for (i = 0; i < dev->num_tx_queues; i++) {
1823 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1824
1825 /* No need to grab the _xmit_lock here. If the
1826 * queue is not stopped for another reason, we
1827 * force a schedule.
1828 */
1829 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1830 netif_schedule_queue(txq);
1831 }
1832 spin_unlock(&dev->tx_global_lock);
1833}
1834
1835static inline void netif_tx_unlock_bh(struct net_device *dev)
1836{
1837 netif_tx_unlock(dev);
1838 local_bh_enable();
1839}
1840
1841#define HARD_TX_LOCK(dev, txq, cpu) { \
1842 if ((dev->features & NETIF_F_LLTX) == 0) { \
1843 __netif_tx_lock(txq, cpu); \
1844 } \
1845}
1846
1847#define HARD_TX_UNLOCK(dev, txq) { \
1848 if ((dev->features & NETIF_F_LLTX) == 0) { \
1849 __netif_tx_unlock(txq); \
1850 } \
1851}
1852
1853static inline void netif_tx_disable(struct net_device *dev)
1854{
1855 unsigned int i;
1856 int cpu;
1857
1858 local_bh_disable();
1859 cpu = smp_processor_id();
1860 for (i = 0; i < dev->num_tx_queues; i++) {
1861 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1862
1863 __netif_tx_lock(txq, cpu);
1864 netif_tx_stop_queue(txq);
1865 __netif_tx_unlock(txq);
1866 }
1867 local_bh_enable();
1868}
1869
1870static inline void netif_addr_lock(struct net_device *dev)
1871{
1872 spin_lock(&dev->addr_list_lock);
1873}
1874
1875static inline void netif_addr_lock_bh(struct net_device *dev)
1876{
1877 spin_lock_bh(&dev->addr_list_lock);
1878}
1879
1880static inline void netif_addr_unlock(struct net_device *dev)
1881{
1882 spin_unlock(&dev->addr_list_lock);
1883}
1884
1885static inline void netif_addr_unlock_bh(struct net_device *dev)
1886{
1887 spin_unlock_bh(&dev->addr_list_lock);
1888}
1889
1890/*
1891 * dev_addrs walker. Should be used only for read access. Call with
1892 * rcu_read_lock held.
1893 */
1894#define for_each_dev_addr(dev, ha) \
1895 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
1896
1897/* These functions live elsewhere (drivers/net/net_init.c, but related) */
1898
1899extern void ether_setup(struct net_device *dev);
1900
1901/* Support for loadable net-drivers */
1902extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1903 void (*setup)(struct net_device *),
1904 unsigned int queue_count);
1905#define alloc_netdev(sizeof_priv, name, setup) \
1906 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1907extern int register_netdev(struct net_device *dev);
1908extern void unregister_netdev(struct net_device *dev);
1909
1910/* Functions used for device addresses handling */
1911extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
1912 unsigned char addr_type);
1913extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
1914 unsigned char addr_type);
1915extern int dev_addr_add_multiple(struct net_device *to_dev,
1916 struct net_device *from_dev,
1917 unsigned char addr_type);
1918extern int dev_addr_del_multiple(struct net_device *to_dev,
1919 struct net_device *from_dev,
1920 unsigned char addr_type);
1921
1922/* Functions used for secondary unicast and multicast support */
1923extern void dev_set_rx_mode(struct net_device *dev);
1924extern void __dev_set_rx_mode(struct net_device *dev);
1925extern int dev_unicast_delete(struct net_device *dev, void *addr);
1926extern int dev_unicast_add(struct net_device *dev, void *addr);
1927extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1928extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1929extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1930extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1931extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1932extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1933extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1934extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1935extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1936extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1937extern int dev_set_promiscuity(struct net_device *dev, int inc);
1938extern int dev_set_allmulti(struct net_device *dev, int inc);
1939extern void netdev_state_change(struct net_device *dev);
1940extern void netdev_bonding_change(struct net_device *dev,
1941 unsigned long event);
1942extern void netdev_features_change(struct net_device *dev);
1943/* Load a device via the kmod */
1944extern void dev_load(struct net *net, const char *name);
1945extern void dev_mcast_init(void);
1946extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1947extern void dev_txq_stats_fold(const struct net_device *dev, struct net_device_stats *stats);
1948
1949extern int netdev_max_backlog;
1950extern int weight_p;
1951extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1952extern int skb_checksum_help(struct sk_buff *skb);
1953extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1954#ifdef CONFIG_BUG
1955extern void netdev_rx_csum_fault(struct net_device *dev);
1956#else
1957static inline void netdev_rx_csum_fault(struct net_device *dev)
1958{
1959}
1960#endif
1961/* rx skb timestamps */
1962extern void net_enable_timestamp(void);
1963extern void net_disable_timestamp(void);
1964
1965#ifdef CONFIG_PROC_FS
1966extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1967extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1968extern void dev_seq_stop(struct seq_file *seq, void *v);
1969#endif
1970
1971extern int netdev_class_create_file(struct class_attribute *class_attr);
1972extern void netdev_class_remove_file(struct class_attribute *class_attr);
1973
1974extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1975
1976extern void linkwatch_run_queue(void);
1977
1978unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1979 unsigned long mask);
1980unsigned long netdev_fix_features(unsigned long features, const char *name);
1981
1982static inline int net_gso_ok(int features, int gso_type)
1983{
1984 int feature = gso_type << NETIF_F_GSO_SHIFT;
1985 return (features & feature) == feature;
1986}
1987
1988static inline int skb_gso_ok(struct sk_buff *skb, int features)
1989{
1990 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
1991 (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST));
1992}
1993
1994static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1995{
1996 return skb_is_gso(skb) &&
1997 (!skb_gso_ok(skb, dev->features) ||
1998 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1999}
2000
2001static inline void netif_set_gso_max_size(struct net_device *dev,
2002 unsigned int size)
2003{
2004 dev->gso_max_size = size;
2005}
2006
2007static inline void skb_bond_set_mac_by_master(struct sk_buff *skb,
2008 struct net_device *master)
2009{
2010 if (skb->pkt_type == PACKET_HOST) {
2011 u16 *dest = (u16 *) eth_hdr(skb)->h_dest;
2012
2013 memcpy(dest, master->dev_addr, ETH_ALEN);
2014 }
2015}
2016
2017/* On bonding slaves other than the currently active slave, suppress
2018 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
2019 * ARP on active-backup slaves with arp_validate enabled.
2020 */
2021static inline int skb_bond_should_drop(struct sk_buff *skb)
2022{
2023 struct net_device *dev = skb->dev;
2024 struct net_device *master = dev->master;
2025
2026 if (master) {
2027 if (master->priv_flags & IFF_MASTER_ARPMON)
2028 dev->last_rx = jiffies;
2029
2030 if ((master->priv_flags & IFF_MASTER_ALB) && master->br_port) {
2031 /* Do address unmangle. The local destination address
2032 * will be always the one master has. Provides the right
2033 * functionality in a bridge.
2034 */
2035 skb_bond_set_mac_by_master(skb, master);
2036 }
2037
2038 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
2039 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
2040 skb->protocol == __cpu_to_be16(ETH_P_ARP))
2041 return 0;
2042
2043 if (master->priv_flags & IFF_MASTER_ALB) {
2044 if (skb->pkt_type != PACKET_BROADCAST &&
2045 skb->pkt_type != PACKET_MULTICAST)
2046 return 0;
2047 }
2048 if (master->priv_flags & IFF_MASTER_8023AD &&
2049 skb->protocol == __cpu_to_be16(ETH_P_SLOW))
2050 return 0;
2051
2052 return 1;
2053 }
2054 }
2055 return 0;
2056}
2057
2058extern struct pernet_operations __net_initdata loopback_net_ops;
2059
2060static inline int dev_ethtool_get_settings(struct net_device *dev,
2061 struct ethtool_cmd *cmd)
2062{
2063 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2064 return -EOPNOTSUPP;
2065 return dev->ethtool_ops->get_settings(dev, cmd);
2066}
2067
2068static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2069{
2070 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2071 return 0;
2072 return dev->ethtool_ops->get_rx_csum(dev);
2073}
2074
2075static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2076{
2077 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2078 return 0;
2079 return dev->ethtool_ops->get_flags(dev);
2080}
2081#endif /* __KERNEL__ */
2082
2083#endif /* _LINUX_NETDEVICE_H */
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