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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/*
67 * Transmit return codes: transmit return codes originate from three different
68 * namespaces:
69 *
70 * - qdisc return codes
71 * - driver transmit return codes
72 * - errno values
73 *
74 * Drivers are allowed to return any one of those in their hard_start_xmit()
75 * function. Real network devices commonly used with qdiscs should only return
76 * the driver transmit return codes though - when qdiscs are used, the actual
77 * transmission happens asynchronously, so the value is not propagated to
78 * higher layers. Virtual network devices transmit synchronously, in this case
79 * the driver transmit return codes are consumed by dev_queue_xmit(), all
80 * others are propagated to higher layers.
81 */
82
83/* qdisc ->enqueue() return codes. */
84#define NET_XMIT_SUCCESS 0x00
85#define NET_XMIT_DROP 0x10 /* skb dropped */
86#define NET_XMIT_CN 0x20 /* congestion notification */
87#define NET_XMIT_POLICED 0x30 /* skb is shot by police */
88#define NET_XMIT_MASK 0xf0 /* qdisc flags in net/sch_generic.h */
89
90/* Backlog congestion levels */
91#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
92#define NET_RX_DROP 1 /* packet dropped */
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 0xf
102
103enum netdev_tx {
104 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
105 NETDEV_TX_OK = 0, /* driver took care of packet */
106 NETDEV_TX_BUSY = 1, /* driver tx path was busy*/
107 NETDEV_TX_LOCKED = 2, /* driver tx lock was already taken */
108};
109typedef enum netdev_tx netdev_tx_t;
110
111#endif
112
113#define MAX_ADDR_LEN 32 /* Largest hardware address length */
114
115#ifdef __KERNEL__
116/*
117 * Compute the worst case header length according to the protocols
118 * used.
119 */
120
121#if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
122# if defined(CONFIG_MAC80211_MESH)
123# define LL_MAX_HEADER 128
124# else
125# define LL_MAX_HEADER 96
126# endif
127#elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
128# define LL_MAX_HEADER 48
129#else
130# define LL_MAX_HEADER 32
131#endif
132
133#if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
134 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
135 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
136 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
137#define MAX_HEADER LL_MAX_HEADER
138#else
139#define MAX_HEADER (LL_MAX_HEADER + 48)
140#endif
141
142#endif /* __KERNEL__ */
143
144/*
145 * Network device statistics. Akin to the 2.0 ether stats but
146 * with byte counters.
147 */
148
149struct net_device_stats {
150 unsigned long rx_packets; /* total packets received */
151 unsigned long tx_packets; /* total packets transmitted */
152 unsigned long rx_bytes; /* total bytes received */
153 unsigned long tx_bytes; /* total bytes transmitted */
154 unsigned long rx_errors; /* bad packets received */
155 unsigned long tx_errors; /* packet transmit problems */
156 unsigned long rx_dropped; /* no space in linux buffers */
157 unsigned long tx_dropped; /* no space available in linux */
158 unsigned long multicast; /* multicast packets received */
159 unsigned long collisions;
160
161 /* detailed rx_errors: */
162 unsigned long rx_length_errors;
163 unsigned long rx_over_errors; /* receiver ring buff overflow */
164 unsigned long rx_crc_errors; /* recved pkt with crc error */
165 unsigned long rx_frame_errors; /* recv'd frame alignment error */
166 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
167 unsigned long rx_missed_errors; /* receiver missed packet */
168
169 /* detailed tx_errors */
170 unsigned long tx_aborted_errors;
171 unsigned long tx_carrier_errors;
172 unsigned long tx_fifo_errors;
173 unsigned long tx_heartbeat_errors;
174 unsigned long tx_window_errors;
175
176 /* for cslip etc */
177 unsigned long rx_compressed;
178 unsigned long tx_compressed;
179};
180
181
182/* Media selection options. */
183enum {
184 IF_PORT_UNKNOWN = 0,
185 IF_PORT_10BASE2,
186 IF_PORT_10BASET,
187 IF_PORT_AUI,
188 IF_PORT_100BASET,
189 IF_PORT_100BASETX,
190 IF_PORT_100BASEFX
191};
192
193#ifdef __KERNEL__
194
195#include <linux/cache.h>
196#include <linux/skbuff.h>
197
198struct neighbour;
199struct neigh_parms;
200struct sk_buff;
201
202struct netif_rx_stats {
203 unsigned total;
204 unsigned dropped;
205 unsigned time_squeeze;
206 unsigned cpu_collision;
207};
208
209DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
210
211struct dev_addr_list {
212 struct dev_addr_list *next;
213 u8 da_addr[MAX_ADDR_LEN];
214 u8 da_addrlen;
215 u8 da_synced;
216 int da_users;
217 int da_gusers;
218};
219
220/*
221 * We tag multicasts with these structures.
222 */
223
224#define dev_mc_list dev_addr_list
225#define dmi_addr da_addr
226#define dmi_addrlen da_addrlen
227#define dmi_users da_users
228#define dmi_gusers da_gusers
229
230struct netdev_hw_addr {
231 struct list_head list;
232 unsigned char addr[MAX_ADDR_LEN];
233 unsigned char type;
234#define NETDEV_HW_ADDR_T_LAN 1
235#define NETDEV_HW_ADDR_T_SAN 2
236#define NETDEV_HW_ADDR_T_SLAVE 3
237#define NETDEV_HW_ADDR_T_UNICAST 4
238 int refcount;
239 bool synced;
240 struct rcu_head rcu_head;
241};
242
243struct netdev_hw_addr_list {
244 struct list_head list;
245 int count;
246};
247
248struct hh_cache {
249 struct hh_cache *hh_next; /* Next entry */
250 atomic_t hh_refcnt; /* number of users */
251/*
252 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
253 * cache line on SMP.
254 * They are mostly read, but hh_refcnt may be changed quite frequently,
255 * incurring cache line ping pongs.
256 */
257 __be16 hh_type ____cacheline_aligned_in_smp;
258 /* protocol identifier, f.e ETH_P_IP
259 * NOTE: For VLANs, this will be the
260 * encapuslated type. --BLG
261 */
262 u16 hh_len; /* length of header */
263 int (*hh_output)(struct sk_buff *skb);
264 seqlock_t hh_lock;
265
266 /* cached hardware header; allow for machine alignment needs. */
267#define HH_DATA_MOD 16
268#define HH_DATA_OFF(__len) \
269 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
270#define HH_DATA_ALIGN(__len) \
271 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
272 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
273};
274
275/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
276 * Alternative is:
277 * dev->hard_header_len ? (dev->hard_header_len +
278 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
279 *
280 * We could use other alignment values, but we must maintain the
281 * relationship HH alignment <= LL alignment.
282 *
283 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
284 * may need.
285 */
286#define LL_RESERVED_SPACE(dev) \
287 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
288#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
289 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
290#define LL_ALLOCATED_SPACE(dev) \
291 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
292
293struct header_ops {
294 int (*create) (struct sk_buff *skb, struct net_device *dev,
295 unsigned short type, const void *daddr,
296 const void *saddr, unsigned len);
297 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
298 int (*rebuild)(struct sk_buff *skb);
299#define HAVE_HEADER_CACHE
300 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
301 void (*cache_update)(struct hh_cache *hh,
302 const struct net_device *dev,
303 const unsigned char *haddr);
304};
305
306/* These flag bits are private to the generic network queueing
307 * layer, they may not be explicitly referenced by any other
308 * code.
309 */
310
311enum netdev_state_t {
312 __LINK_STATE_START,
313 __LINK_STATE_PRESENT,
314 __LINK_STATE_NOCARRIER,
315 __LINK_STATE_LINKWATCH_PENDING,
316 __LINK_STATE_DORMANT,
317};
318
319
320/*
321 * This structure holds at boot time configured netdevice settings. They
322 * are then used in the device probing.
323 */
324struct netdev_boot_setup {
325 char name[IFNAMSIZ];
326 struct ifmap map;
327};
328#define NETDEV_BOOT_SETUP_MAX 8
329
330extern int __init netdev_boot_setup(char *str);
331
332/*
333 * Structure for NAPI scheduling similar to tasklet but with weighting
334 */
335struct napi_struct {
336 /* The poll_list must only be managed by the entity which
337 * changes the state of the NAPI_STATE_SCHED bit. This means
338 * whoever atomically sets that bit can add this napi_struct
339 * to the per-cpu poll_list, and whoever clears that bit
340 * can remove from the list right before clearing the bit.
341 */
342 struct list_head poll_list;
343
344 unsigned long state;
345 int weight;
346 int (*poll)(struct napi_struct *, int);
347#ifdef CONFIG_NETPOLL
348 spinlock_t poll_lock;
349 int poll_owner;
350#endif
351
352 unsigned int gro_count;
353
354 struct net_device *dev;
355 struct list_head dev_list;
356 struct sk_buff *gro_list;
357 struct sk_buff *skb;
358};
359
360enum {
361 NAPI_STATE_SCHED, /* Poll is scheduled */
362 NAPI_STATE_DISABLE, /* Disable pending */
363 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
364};
365
366enum gro_result {
367 GRO_MERGED,
368 GRO_MERGED_FREE,
369 GRO_HELD,
370 GRO_NORMAL,
371 GRO_DROP,
372};
373typedef enum gro_result gro_result_t;
374
375extern void __napi_schedule(struct napi_struct *n);
376
377static inline int napi_disable_pending(struct napi_struct *n)
378{
379 return test_bit(NAPI_STATE_DISABLE, &n->state);
380}
381
382/**
383 * napi_schedule_prep - check if napi can be scheduled
384 * @n: napi context
385 *
386 * Test if NAPI routine is already running, and if not mark
387 * it as running. This is used as a condition variable
388 * insure only one NAPI poll instance runs. We also make
389 * sure there is no pending NAPI disable.
390 */
391static inline int napi_schedule_prep(struct napi_struct *n)
392{
393 return !napi_disable_pending(n) &&
394 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
395}
396
397/**
398 * napi_schedule - schedule NAPI poll
399 * @n: napi context
400 *
401 * Schedule NAPI poll routine to be called if it is not already
402 * running.
403 */
404static inline void napi_schedule(struct napi_struct *n)
405{
406 if (napi_schedule_prep(n))
407 __napi_schedule(n);
408}
409
410/* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
411static inline int napi_reschedule(struct napi_struct *napi)
412{
413 if (napi_schedule_prep(napi)) {
414 __napi_schedule(napi);
415 return 1;
416 }
417 return 0;
418}
419
420/**
421 * napi_complete - NAPI processing complete
422 * @n: napi context
423 *
424 * Mark NAPI processing as complete.
425 */
426extern void __napi_complete(struct napi_struct *n);
427extern void napi_complete(struct napi_struct *n);
428
429/**
430 * napi_disable - prevent NAPI from scheduling
431 * @n: napi context
432 *
433 * Stop NAPI from being scheduled on this context.
434 * Waits till any outstanding processing completes.
435 */
436static inline void napi_disable(struct napi_struct *n)
437{
438 set_bit(NAPI_STATE_DISABLE, &n->state);
439 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
440 msleep(1);
441 clear_bit(NAPI_STATE_DISABLE, &n->state);
442}
443
444/**
445 * napi_enable - enable NAPI scheduling
446 * @n: napi context
447 *
448 * Resume NAPI from being scheduled on this context.
449 * Must be paired with napi_disable.
450 */
451static inline void napi_enable(struct napi_struct *n)
452{
453 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
454 smp_mb__before_clear_bit();
455 clear_bit(NAPI_STATE_SCHED, &n->state);
456}
457
458#ifdef CONFIG_SMP
459/**
460 * napi_synchronize - wait until NAPI is not running
461 * @n: napi context
462 *
463 * Wait until NAPI is done being scheduled on this context.
464 * Waits till any outstanding processing completes but
465 * does not disable future activations.
466 */
467static inline void napi_synchronize(const struct napi_struct *n)
468{
469 while (test_bit(NAPI_STATE_SCHED, &n->state))
470 msleep(1);
471}
472#else
473# define napi_synchronize(n) barrier()
474#endif
475
476enum netdev_queue_state_t {
477 __QUEUE_STATE_XOFF,
478 __QUEUE_STATE_FROZEN,
479};
480
481struct netdev_queue {
482/*
483 * read mostly part
484 */
485 struct net_device *dev;
486 struct Qdisc *qdisc;
487 unsigned long state;
488 struct Qdisc *qdisc_sleeping;
489/*
490 * write mostly part
491 */
492 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
493 int xmit_lock_owner;
494 /*
495 * please use this field instead of dev->trans_start
496 */
497 unsigned long trans_start;
498 unsigned long tx_bytes;
499 unsigned long tx_packets;
500 unsigned long tx_dropped;
501} ____cacheline_aligned_in_smp;
502
503
504/*
505 * This structure defines the management hooks for network devices.
506 * The following hooks can be defined; unless noted otherwise, they are
507 * optional and can be filled with a null pointer.
508 *
509 * int (*ndo_init)(struct net_device *dev);
510 * This function is called once when network device is registered.
511 * The network device can use this to any late stage initializaton
512 * or semantic validattion. It can fail with an error code which will
513 * be propogated back to register_netdev
514 *
515 * void (*ndo_uninit)(struct net_device *dev);
516 * This function is called when device is unregistered or when registration
517 * fails. It is not called if init fails.
518 *
519 * int (*ndo_open)(struct net_device *dev);
520 * This function is called when network device transistions to the up
521 * state.
522 *
523 * int (*ndo_stop)(struct net_device *dev);
524 * This function is called when network device transistions to the down
525 * state.
526 *
527 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
528 * struct net_device *dev);
529 * Called when a packet needs to be transmitted.
530 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
531 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
532 * Required can not be NULL.
533 *
534 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
535 * Called to decide which queue to when device supports multiple
536 * transmit queues.
537 *
538 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
539 * This function is called to allow device receiver to make
540 * changes to configuration when multicast or promiscious is enabled.
541 *
542 * void (*ndo_set_rx_mode)(struct net_device *dev);
543 * This function is called device changes address list filtering.
544 *
545 * void (*ndo_set_multicast_list)(struct net_device *dev);
546 * This function is called when the multicast address list changes.
547 *
548 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
549 * This function is called when the Media Access Control address
550 * needs to be changed. If this interface is not defined, the
551 * mac address can not be changed.
552 *
553 * int (*ndo_validate_addr)(struct net_device *dev);
554 * Test if Media Access Control address is valid for the device.
555 *
556 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
557 * Called when a user request an ioctl which can't be handled by
558 * the generic interface code. If not defined ioctl's return
559 * not supported error code.
560 *
561 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
562 * Used to set network devices bus interface parameters. This interface
563 * is retained for legacy reason, new devices should use the bus
564 * interface (PCI) for low level management.
565 *
566 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
567 * Called when a user wants to change the Maximum Transfer Unit
568 * of a device. If not defined, any request to change MTU will
569 * will return an error.
570 *
571 * void (*ndo_tx_timeout)(struct net_device *dev);
572 * Callback uses when the transmitter has not made any progress
573 * for dev->watchdog ticks.
574 *
575 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
576 * Called when a user wants to get the network device usage
577 * statistics. If not defined, the counters in dev->stats will
578 * be used.
579 *
580 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
581 * If device support VLAN receive accleration
582 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
583 * when vlan groups for the device changes. Note: grp is NULL
584 * if no vlan's groups are being used.
585 *
586 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
587 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
588 * this function is called when a VLAN id is registered.
589 *
590 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
591 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
592 * this function is called when a VLAN id is unregistered.
593 *
594 * void (*ndo_poll_controller)(struct net_device *dev);
595 */
596#define HAVE_NET_DEVICE_OPS
597struct net_device_ops {
598 int (*ndo_init)(struct net_device *dev);
599 void (*ndo_uninit)(struct net_device *dev);
600 int (*ndo_open)(struct net_device *dev);
601 int (*ndo_stop)(struct net_device *dev);
602 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
603 struct net_device *dev);
604 u16 (*ndo_select_queue)(struct net_device *dev,
605 struct sk_buff *skb);
606#define HAVE_CHANGE_RX_FLAGS
607 void (*ndo_change_rx_flags)(struct net_device *dev,
608 int flags);
609#define HAVE_SET_RX_MODE
610 void (*ndo_set_rx_mode)(struct net_device *dev);
611#define HAVE_MULTICAST
612 void (*ndo_set_multicast_list)(struct net_device *dev);
613#define HAVE_SET_MAC_ADDR
614 int (*ndo_set_mac_address)(struct net_device *dev,
615 void *addr);
616#define HAVE_VALIDATE_ADDR
617 int (*ndo_validate_addr)(struct net_device *dev);
618#define HAVE_PRIVATE_IOCTL
619 int (*ndo_do_ioctl)(struct net_device *dev,
620 struct ifreq *ifr, int cmd);
621#define HAVE_SET_CONFIG
622 int (*ndo_set_config)(struct net_device *dev,
623 struct ifmap *map);
624#define HAVE_CHANGE_MTU
625 int (*ndo_change_mtu)(struct net_device *dev,
626 int new_mtu);
627 int (*ndo_neigh_setup)(struct net_device *dev,
628 struct neigh_parms *);
629#define HAVE_TX_TIMEOUT
630 void (*ndo_tx_timeout) (struct net_device *dev);
631
632 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
633
634 void (*ndo_vlan_rx_register)(struct net_device *dev,
635 struct vlan_group *grp);
636 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
637 unsigned short vid);
638 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
639 unsigned short vid);
640#ifdef CONFIG_NET_POLL_CONTROLLER
641#define HAVE_NETDEV_POLL
642 void (*ndo_poll_controller)(struct net_device *dev);
643#endif
644#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
645 int (*ndo_fcoe_enable)(struct net_device *dev);
646 int (*ndo_fcoe_disable)(struct net_device *dev);
647 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
648 u16 xid,
649 struct scatterlist *sgl,
650 unsigned int sgc);
651 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
652 u16 xid);
653#define NETDEV_FCOE_WWNN 0
654#define NETDEV_FCOE_WWPN 1
655 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
656 u64 *wwn, int type);
657#endif
658};
659
660/*
661 * The DEVICE structure.
662 * Actually, this whole structure is a big mistake. It mixes I/O
663 * data with strictly "high-level" data, and it has to know about
664 * almost every data structure used in the INET module.
665 *
666 * FIXME: cleanup struct net_device such that network protocol info
667 * moves out.
668 */
669
670struct net_device {
671
672 /*
673 * This is the first field of the "visible" part of this structure
674 * (i.e. as seen by users in the "Space.c" file). It is the name
675 * the interface.
676 */
677 char name[IFNAMSIZ];
678 /* device name hash chain */
679 struct hlist_node name_hlist;
680 /* snmp alias */
681 char *ifalias;
682
683 /*
684 * I/O specific fields
685 * FIXME: Merge these and struct ifmap into one
686 */
687 unsigned long mem_end; /* shared mem end */
688 unsigned long mem_start; /* shared mem start */
689 unsigned long base_addr; /* device I/O address */
690 unsigned int irq; /* device IRQ number */
691
692 /*
693 * Some hardware also needs these fields, but they are not
694 * part of the usual set specified in Space.c.
695 */
696
697 unsigned char if_port; /* Selectable AUI, TP,..*/
698 unsigned char dma; /* DMA channel */
699
700 unsigned long state;
701
702 struct list_head dev_list;
703 struct list_head napi_list;
704 struct list_head unreg_list;
705
706 /* Net device features */
707 unsigned long features;
708#define NETIF_F_SG 1 /* Scatter/gather IO. */
709#define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
710#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
711#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
712#define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
713#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
714#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
715#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
716#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
717#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
718#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
719#define NETIF_F_GSO 2048 /* Enable software GSO. */
720#define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
721 /* do not use LLTX in new drivers */
722#define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
723#define NETIF_F_GRO 16384 /* Generic receive offload */
724#define NETIF_F_LRO 32768 /* large receive offload */
725
726/* the GSO_MASK reserves bits 16 through 23 */
727#define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
728#define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
729#define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
730
731 /* Segmentation offload features */
732#define NETIF_F_GSO_SHIFT 16
733#define NETIF_F_GSO_MASK 0x00ff0000
734#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
735#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
736#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
737#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
738#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
739#define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
740
741 /* List of features with software fallbacks. */
742#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
743
744
745#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
746#define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
747#define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
748#define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
749
750 /*
751 * If one device supports one of these features, then enable them
752 * for all in netdev_increment_features.
753 */
754#define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
755 NETIF_F_SG | NETIF_F_HIGHDMA | \
756 NETIF_F_FRAGLIST)
757
758 /* Interface index. Unique device identifier */
759 int ifindex;
760 int iflink;
761
762 struct net_device_stats stats;
763
764#ifdef CONFIG_WIRELESS_EXT
765 /* List of functions to handle Wireless Extensions (instead of ioctl).
766 * See <net/iw_handler.h> for details. Jean II */
767 const struct iw_handler_def * wireless_handlers;
768 /* Instance data managed by the core of Wireless Extensions. */
769 struct iw_public_data * wireless_data;
770#endif
771 /* Management operations */
772 const struct net_device_ops *netdev_ops;
773 const struct ethtool_ops *ethtool_ops;
774
775 /* Hardware header description */
776 const struct header_ops *header_ops;
777
778 unsigned int flags; /* interface flags (a la BSD) */
779 unsigned short gflags;
780 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
781 unsigned short padded; /* How much padding added by alloc_netdev() */
782
783 unsigned char operstate; /* RFC2863 operstate */
784 unsigned char link_mode; /* mapping policy to operstate */
785
786 unsigned mtu; /* interface MTU value */
787 unsigned short type; /* interface hardware type */
788 unsigned short hard_header_len; /* hardware hdr length */
789
790 /* extra head- and tailroom the hardware may need, but not in all cases
791 * can this be guaranteed, especially tailroom. Some cases also use
792 * LL_MAX_HEADER instead to allocate the skb.
793 */
794 unsigned short needed_headroom;
795 unsigned short needed_tailroom;
796
797 struct net_device *master; /* Pointer to master device of a group,
798 * which this device is member of.
799 */
800
801 /* Interface address info. */
802 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
803 unsigned char addr_len; /* hardware address length */
804 unsigned short dev_id; /* for shared network cards */
805
806 struct netdev_hw_addr_list uc; /* Secondary unicast
807 mac addresses */
808 int uc_promisc;
809 spinlock_t addr_list_lock;
810 struct dev_addr_list *mc_list; /* Multicast mac addresses */
811 int mc_count; /* Number of installed mcasts */
812 unsigned int promiscuity;
813 unsigned int allmulti;
814
815
816 /* Protocol specific pointers */
817
818#ifdef CONFIG_NET_DSA
819 void *dsa_ptr; /* dsa specific data */
820#endif
821 void *atalk_ptr; /* AppleTalk link */
822 void *ip_ptr; /* IPv4 specific data */
823 void *dn_ptr; /* DECnet specific data */
824 void *ip6_ptr; /* IPv6 specific data */
825 void *ec_ptr; /* Econet specific data */
826 void *ax25_ptr; /* AX.25 specific data */
827 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
828 assign before registering */
829
830/*
831 * Cache line mostly used on receive path (including eth_type_trans())
832 */
833 unsigned long last_rx; /* Time of last Rx */
834 /* Interface address info used in eth_type_trans() */
835 unsigned char *dev_addr; /* hw address, (before bcast
836 because most packets are
837 unicast) */
838
839 struct netdev_hw_addr_list dev_addrs; /* list of device
840 hw addresses */
841
842 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
843
844 struct netdev_queue rx_queue;
845
846 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
847
848 /* Number of TX queues allocated at alloc_netdev_mq() time */
849 unsigned int num_tx_queues;
850
851 /* Number of TX queues currently active in device */
852 unsigned int real_num_tx_queues;
853
854 /* root qdisc from userspace point of view */
855 struct Qdisc *qdisc;
856
857 unsigned long tx_queue_len; /* Max frames per queue allowed */
858 spinlock_t tx_global_lock;
859/*
860 * One part is mostly used on xmit path (device)
861 */
862 /* These may be needed for future network-power-down code. */
863
864 /*
865 * trans_start here is expensive for high speed devices on SMP,
866 * please use netdev_queue->trans_start instead.
867 */
868 unsigned long trans_start; /* Time (in jiffies) of last Tx */
869
870 int watchdog_timeo; /* used by dev_watchdog() */
871 struct timer_list watchdog_timer;
872
873 /* Number of references to this device */
874 atomic_t refcnt ____cacheline_aligned_in_smp;
875
876 /* delayed register/unregister */
877 struct list_head todo_list;
878 /* device index hash chain */
879 struct hlist_node index_hlist;
880
881 struct net_device *link_watch_next;
882
883 /* register/unregister state machine */
884 enum { NETREG_UNINITIALIZED=0,
885 NETREG_REGISTERED, /* completed register_netdevice */
886 NETREG_UNREGISTERING, /* called unregister_netdevice */
887 NETREG_UNREGISTERED, /* completed unregister todo */
888 NETREG_RELEASED, /* called free_netdev */
889 NETREG_DUMMY, /* dummy device for NAPI poll */
890 } reg_state;
891
892 /* Called from unregister, can be used to call free_netdev */
893 void (*destructor)(struct net_device *dev);
894
895#ifdef CONFIG_NETPOLL
896 struct netpoll_info *npinfo;
897#endif
898
899#ifdef CONFIG_NET_NS
900 /* Network namespace this network device is inside */
901 struct net *nd_net;
902#endif
903
904 /* mid-layer private */
905 void *ml_priv;
906
907 /* bridge stuff */
908 struct net_bridge_port *br_port;
909 /* macvlan */
910 struct macvlan_port *macvlan_port;
911 /* GARP */
912 struct garp_port *garp_port;
913
914 /* class/net/name entry */
915 struct device dev;
916 /* space for optional device, statistics, and wireless sysfs groups */
917 const struct attribute_group *sysfs_groups[4];
918
919 /* rtnetlink link ops */
920 const struct rtnl_link_ops *rtnl_link_ops;
921
922 /* VLAN feature mask */
923 unsigned long vlan_features;
924
925 /* for setting kernel sock attribute on TCP connection setup */
926#define GSO_MAX_SIZE 65536
927 unsigned int gso_max_size;
928
929#ifdef CONFIG_DCB
930 /* Data Center Bridging netlink ops */
931 const struct dcbnl_rtnl_ops *dcbnl_ops;
932#endif
933
934#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
935 /* max exchange id for FCoE LRO by ddp */
936 unsigned int fcoe_ddp_xid;
937#endif
938};
939#define to_net_dev(d) container_of(d, struct net_device, dev)
940
941#define NETDEV_ALIGN 32
942
943static inline
944struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
945 unsigned int index)
946{
947 return &dev->_tx[index];
948}
949
950static inline void netdev_for_each_tx_queue(struct net_device *dev,
951 void (*f)(struct net_device *,
952 struct netdev_queue *,
953 void *),
954 void *arg)
955{
956 unsigned int i;
957
958 for (i = 0; i < dev->num_tx_queues; i++)
959 f(dev, &dev->_tx[i], arg);
960}
961
962/*
963 * Net namespace inlines
964 */
965static inline
966struct net *dev_net(const struct net_device *dev)
967{
968#ifdef CONFIG_NET_NS
969 return dev->nd_net;
970#else
971 return &init_net;
972#endif
973}
974
975static inline
976void dev_net_set(struct net_device *dev, struct net *net)
977{
978#ifdef CONFIG_NET_NS
979 release_net(dev->nd_net);
980 dev->nd_net = hold_net(net);
981#endif
982}
983
984static inline bool netdev_uses_dsa_tags(struct net_device *dev)
985{
986#ifdef CONFIG_NET_DSA_TAG_DSA
987 if (dev->dsa_ptr != NULL)
988 return dsa_uses_dsa_tags(dev->dsa_ptr);
989#endif
990
991 return 0;
992}
993
994static inline bool netdev_uses_trailer_tags(struct net_device *dev)
995{
996#ifdef CONFIG_NET_DSA_TAG_TRAILER
997 if (dev->dsa_ptr != NULL)
998 return dsa_uses_trailer_tags(dev->dsa_ptr);
999#endif
1000
1001 return 0;
1002}
1003
1004/**
1005 * netdev_priv - access network device private data
1006 * @dev: network device
1007 *
1008 * Get network device private data
1009 */
1010static inline void *netdev_priv(const struct net_device *dev)
1011{
1012 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1013}
1014
1015/* Set the sysfs physical device reference for the network logical device
1016 * if set prior to registration will cause a symlink during initialization.
1017 */
1018#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1019
1020/* Set the sysfs device type for the network logical device to allow
1021 * fin grained indentification of different network device types. For
1022 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1023 */
1024#define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1025
1026/**
1027 * netif_napi_add - initialize a napi context
1028 * @dev: network device
1029 * @napi: napi context
1030 * @poll: polling function
1031 * @weight: default weight
1032 *
1033 * netif_napi_add() must be used to initialize a napi context prior to calling
1034 * *any* of the other napi related functions.
1035 */
1036void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1037 int (*poll)(struct napi_struct *, int), int weight);
1038
1039/**
1040 * netif_napi_del - remove a napi context
1041 * @napi: napi context
1042 *
1043 * netif_napi_del() removes a napi context from the network device napi list
1044 */
1045void netif_napi_del(struct napi_struct *napi);
1046
1047struct napi_gro_cb {
1048 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1049 void *frag0;
1050
1051 /* Length of frag0. */
1052 unsigned int frag0_len;
1053
1054 /* This indicates where we are processing relative to skb->data. */
1055 int data_offset;
1056
1057 /* This is non-zero if the packet may be of the same flow. */
1058 int same_flow;
1059
1060 /* This is non-zero if the packet cannot be merged with the new skb. */
1061 int flush;
1062
1063 /* Number of segments aggregated. */
1064 int count;
1065
1066 /* Free the skb? */
1067 int free;
1068};
1069
1070#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1071
1072struct packet_type {
1073 __be16 type; /* This is really htons(ether_type). */
1074 struct net_device *dev; /* NULL is wildcarded here */
1075 int (*func) (struct sk_buff *,
1076 struct net_device *,
1077 struct packet_type *,
1078 struct net_device *);
1079 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1080 int features);
1081 int (*gso_send_check)(struct sk_buff *skb);
1082 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1083 struct sk_buff *skb);
1084 int (*gro_complete)(struct sk_buff *skb);
1085 void *af_packet_priv;
1086 struct list_head list;
1087};
1088
1089#include <linux/interrupt.h>
1090#include <linux/notifier.h>
1091
1092extern rwlock_t dev_base_lock; /* Device list lock */
1093
1094
1095#define for_each_netdev(net, d) \
1096 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1097#define for_each_netdev_rcu(net, d) \
1098 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1099#define for_each_netdev_safe(net, d, n) \
1100 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1101#define for_each_netdev_continue(net, d) \
1102 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1103#define for_each_netdev_continue_rcu(net, d) \
1104 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1105#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1106
1107static inline struct net_device *next_net_device(struct net_device *dev)
1108{
1109 struct list_head *lh;
1110 struct net *net;
1111
1112 net = dev_net(dev);
1113 lh = dev->dev_list.next;
1114 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1115}
1116
1117static inline struct net_device *first_net_device(struct net *net)
1118{
1119 return list_empty(&net->dev_base_head) ? NULL :
1120 net_device_entry(net->dev_base_head.next);
1121}
1122
1123extern int netdev_boot_setup_check(struct net_device *dev);
1124extern unsigned long netdev_boot_base(const char *prefix, int unit);
1125extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1126extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1127extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1128extern void dev_add_pack(struct packet_type *pt);
1129extern void dev_remove_pack(struct packet_type *pt);
1130extern void __dev_remove_pack(struct packet_type *pt);
1131
1132extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1133 unsigned short mask);
1134extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1135extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1136extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1137extern int dev_alloc_name(struct net_device *dev, const char *name);
1138extern int dev_open(struct net_device *dev);
1139extern int dev_close(struct net_device *dev);
1140extern void dev_disable_lro(struct net_device *dev);
1141extern int dev_queue_xmit(struct sk_buff *skb);
1142extern int register_netdevice(struct net_device *dev);
1143extern void unregister_netdevice_queue(struct net_device *dev,
1144 struct list_head *head);
1145extern void unregister_netdevice_many(struct list_head *head);
1146static inline void unregister_netdevice(struct net_device *dev)
1147{
1148 unregister_netdevice_queue(dev, NULL);
1149}
1150
1151extern void free_netdev(struct net_device *dev);
1152extern void synchronize_net(void);
1153extern int register_netdevice_notifier(struct notifier_block *nb);
1154extern int unregister_netdevice_notifier(struct notifier_block *nb);
1155extern int init_dummy_netdev(struct net_device *dev);
1156extern void netdev_resync_ops(struct net_device *dev);
1157
1158extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1159extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1160extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1161extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1162extern int dev_restart(struct net_device *dev);
1163#ifdef CONFIG_NETPOLL_TRAP
1164extern int netpoll_trap(void);
1165#endif
1166extern int skb_gro_receive(struct sk_buff **head,
1167 struct sk_buff *skb);
1168extern void skb_gro_reset_offset(struct sk_buff *skb);
1169
1170static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1171{
1172 return NAPI_GRO_CB(skb)->data_offset;
1173}
1174
1175static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1176{
1177 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1178}
1179
1180static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1181{
1182 NAPI_GRO_CB(skb)->data_offset += len;
1183}
1184
1185static inline void *skb_gro_header_fast(struct sk_buff *skb,
1186 unsigned int offset)
1187{
1188 return NAPI_GRO_CB(skb)->frag0 + offset;
1189}
1190
1191static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1192{
1193 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1194}
1195
1196static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1197 unsigned int offset)
1198{
1199 NAPI_GRO_CB(skb)->frag0 = NULL;
1200 NAPI_GRO_CB(skb)->frag0_len = 0;
1201 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1202}
1203
1204static inline void *skb_gro_mac_header(struct sk_buff *skb)
1205{
1206 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1207}
1208
1209static inline void *skb_gro_network_header(struct sk_buff *skb)
1210{
1211 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1212 skb_network_offset(skb);
1213}
1214
1215static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1216 unsigned short type,
1217 const void *daddr, const void *saddr,
1218 unsigned len)
1219{
1220 if (!dev->header_ops || !dev->header_ops->create)
1221 return 0;
1222
1223 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1224}
1225
1226static inline int dev_parse_header(const struct sk_buff *skb,
1227 unsigned char *haddr)
1228{
1229 const struct net_device *dev = skb->dev;
1230
1231 if (!dev->header_ops || !dev->header_ops->parse)
1232 return 0;
1233 return dev->header_ops->parse(skb, haddr);
1234}
1235
1236typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1237extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1238static inline int unregister_gifconf(unsigned int family)
1239{
1240 return register_gifconf(family, NULL);
1241}
1242
1243/*
1244 * Incoming packets are placed on per-cpu queues so that
1245 * no locking is needed.
1246 */
1247struct softnet_data {
1248 struct Qdisc *output_queue;
1249 struct sk_buff_head input_pkt_queue;
1250 struct list_head poll_list;
1251 struct sk_buff *completion_queue;
1252
1253 struct napi_struct backlog;
1254};
1255
1256DECLARE_PER_CPU(struct softnet_data,softnet_data);
1257
1258#define HAVE_NETIF_QUEUE
1259
1260extern void __netif_schedule(struct Qdisc *q);
1261
1262static inline void netif_schedule_queue(struct netdev_queue *txq)
1263{
1264 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1265 __netif_schedule(txq->qdisc);
1266}
1267
1268static inline void netif_tx_schedule_all(struct net_device *dev)
1269{
1270 unsigned int i;
1271
1272 for (i = 0; i < dev->num_tx_queues; i++)
1273 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1274}
1275
1276static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1277{
1278 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1279}
1280
1281/**
1282 * netif_start_queue - allow transmit
1283 * @dev: network device
1284 *
1285 * Allow upper layers to call the device hard_start_xmit routine.
1286 */
1287static inline void netif_start_queue(struct net_device *dev)
1288{
1289 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1290}
1291
1292static inline void netif_tx_start_all_queues(struct net_device *dev)
1293{
1294 unsigned int i;
1295
1296 for (i = 0; i < dev->num_tx_queues; i++) {
1297 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1298 netif_tx_start_queue(txq);
1299 }
1300}
1301
1302static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1303{
1304#ifdef CONFIG_NETPOLL_TRAP
1305 if (netpoll_trap()) {
1306 netif_tx_start_queue(dev_queue);
1307 return;
1308 }
1309#endif
1310 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1311 __netif_schedule(dev_queue->qdisc);
1312}
1313
1314/**
1315 * netif_wake_queue - restart transmit
1316 * @dev: network device
1317 *
1318 * Allow upper layers to call the device hard_start_xmit routine.
1319 * Used for flow control when transmit resources are available.
1320 */
1321static inline void netif_wake_queue(struct net_device *dev)
1322{
1323 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1324}
1325
1326static inline void netif_tx_wake_all_queues(struct net_device *dev)
1327{
1328 unsigned int i;
1329
1330 for (i = 0; i < dev->num_tx_queues; i++) {
1331 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1332 netif_tx_wake_queue(txq);
1333 }
1334}
1335
1336static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1337{
1338 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1339}
1340
1341/**
1342 * netif_stop_queue - stop transmitted packets
1343 * @dev: network device
1344 *
1345 * Stop upper layers calling the device hard_start_xmit routine.
1346 * Used for flow control when transmit resources are unavailable.
1347 */
1348static inline void netif_stop_queue(struct net_device *dev)
1349{
1350 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1351}
1352
1353static inline void netif_tx_stop_all_queues(struct net_device *dev)
1354{
1355 unsigned int i;
1356
1357 for (i = 0; i < dev->num_tx_queues; i++) {
1358 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1359 netif_tx_stop_queue(txq);
1360 }
1361}
1362
1363static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1364{
1365 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1366}
1367
1368/**
1369 * netif_queue_stopped - test if transmit queue is flowblocked
1370 * @dev: network device
1371 *
1372 * Test if transmit queue on device is currently unable to send.
1373 */
1374static inline int netif_queue_stopped(const struct net_device *dev)
1375{
1376 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1377}
1378
1379static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1380{
1381 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1382}
1383
1384/**
1385 * netif_running - test if up
1386 * @dev: network device
1387 *
1388 * Test if the device has been brought up.
1389 */
1390static inline int netif_running(const struct net_device *dev)
1391{
1392 return test_bit(__LINK_STATE_START, &dev->state);
1393}
1394
1395/*
1396 * Routines to manage the subqueues on a device. We only need start
1397 * stop, and a check if it's stopped. All other device management is
1398 * done at the overall netdevice level.
1399 * Also test the device if we're multiqueue.
1400 */
1401
1402/**
1403 * netif_start_subqueue - allow sending packets on subqueue
1404 * @dev: network device
1405 * @queue_index: sub queue index
1406 *
1407 * Start individual transmit queue of a device with multiple transmit queues.
1408 */
1409static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1410{
1411 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1412
1413 netif_tx_start_queue(txq);
1414}
1415
1416/**
1417 * netif_stop_subqueue - stop sending packets on subqueue
1418 * @dev: network device
1419 * @queue_index: sub queue index
1420 *
1421 * Stop individual transmit queue of a device with multiple transmit queues.
1422 */
1423static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1424{
1425 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1426#ifdef CONFIG_NETPOLL_TRAP
1427 if (netpoll_trap())
1428 return;
1429#endif
1430 netif_tx_stop_queue(txq);
1431}
1432
1433/**
1434 * netif_subqueue_stopped - test status of subqueue
1435 * @dev: network device
1436 * @queue_index: sub queue index
1437 *
1438 * Check individual transmit queue of a device with multiple transmit queues.
1439 */
1440static inline int __netif_subqueue_stopped(const struct net_device *dev,
1441 u16 queue_index)
1442{
1443 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1444
1445 return netif_tx_queue_stopped(txq);
1446}
1447
1448static inline int netif_subqueue_stopped(const struct net_device *dev,
1449 struct sk_buff *skb)
1450{
1451 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1452}
1453
1454/**
1455 * netif_wake_subqueue - allow sending packets on subqueue
1456 * @dev: network device
1457 * @queue_index: sub queue index
1458 *
1459 * Resume individual transmit queue of a device with multiple transmit queues.
1460 */
1461static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1462{
1463 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1464#ifdef CONFIG_NETPOLL_TRAP
1465 if (netpoll_trap())
1466 return;
1467#endif
1468 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1469 __netif_schedule(txq->qdisc);
1470}
1471
1472/**
1473 * netif_is_multiqueue - test if device has multiple transmit queues
1474 * @dev: network device
1475 *
1476 * Check if device has multiple transmit queues
1477 */
1478static inline int netif_is_multiqueue(const struct net_device *dev)
1479{
1480 return (dev->num_tx_queues > 1);
1481}
1482
1483/* Use this variant when it is known for sure that it
1484 * is executing from hardware interrupt context or with hardware interrupts
1485 * disabled.
1486 */
1487extern void dev_kfree_skb_irq(struct sk_buff *skb);
1488
1489/* Use this variant in places where it could be invoked
1490 * from either hardware interrupt or other context, with hardware interrupts
1491 * either disabled or enabled.
1492 */
1493extern void dev_kfree_skb_any(struct sk_buff *skb);
1494
1495#define HAVE_NETIF_RX 1
1496extern int netif_rx(struct sk_buff *skb);
1497extern int netif_rx_ni(struct sk_buff *skb);
1498#define HAVE_NETIF_RECEIVE_SKB 1
1499extern int netif_receive_skb(struct sk_buff *skb);
1500extern void napi_gro_flush(struct napi_struct *napi);
1501extern gro_result_t dev_gro_receive(struct napi_struct *napi,
1502 struct sk_buff *skb);
1503extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1504extern gro_result_t napi_gro_receive(struct napi_struct *napi,
1505 struct sk_buff *skb);
1506extern void napi_reuse_skb(struct napi_struct *napi,
1507 struct sk_buff *skb);
1508extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1509extern gro_result_t napi_frags_finish(struct napi_struct *napi,
1510 struct sk_buff *skb,
1511 gro_result_t ret);
1512extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1513extern gro_result_t napi_gro_frags(struct napi_struct *napi);
1514
1515static inline void napi_free_frags(struct napi_struct *napi)
1516{
1517 kfree_skb(napi->skb);
1518 napi->skb = NULL;
1519}
1520
1521extern void netif_nit_deliver(struct sk_buff *skb);
1522extern int dev_valid_name(const char *name);
1523extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1524extern int dev_ethtool(struct net *net, struct ifreq *);
1525extern unsigned dev_get_flags(const struct net_device *);
1526extern int dev_change_flags(struct net_device *, unsigned);
1527extern int dev_change_name(struct net_device *, const char *);
1528extern int dev_set_alias(struct net_device *, const char *, size_t);
1529extern int dev_change_net_namespace(struct net_device *,
1530 struct net *, const char *);
1531extern int dev_set_mtu(struct net_device *, int);
1532extern int dev_set_mac_address(struct net_device *,
1533 struct sockaddr *);
1534extern int dev_hard_start_xmit(struct sk_buff *skb,
1535 struct net_device *dev,
1536 struct netdev_queue *txq);
1537
1538extern int netdev_budget;
1539
1540/* Called by rtnetlink.c:rtnl_unlock() */
1541extern void netdev_run_todo(void);
1542
1543/**
1544 * dev_put - release reference to device
1545 * @dev: network device
1546 *
1547 * Release reference to device to allow it to be freed.
1548 */
1549static inline void dev_put(struct net_device *dev)
1550{
1551 atomic_dec(&dev->refcnt);
1552}
1553
1554/**
1555 * dev_hold - get reference to device
1556 * @dev: network device
1557 *
1558 * Hold reference to device to keep it from being freed.
1559 */
1560static inline void dev_hold(struct net_device *dev)
1561{
1562 atomic_inc(&dev->refcnt);
1563}
1564
1565/* Carrier loss detection, dial on demand. The functions netif_carrier_on
1566 * and _off may be called from IRQ context, but it is caller
1567 * who is responsible for serialization of these calls.
1568 *
1569 * The name carrier is inappropriate, these functions should really be
1570 * called netif_lowerlayer_*() because they represent the state of any
1571 * kind of lower layer not just hardware media.
1572 */
1573
1574extern void linkwatch_fire_event(struct net_device *dev);
1575
1576/**
1577 * netif_carrier_ok - test if carrier present
1578 * @dev: network device
1579 *
1580 * Check if carrier is present on device
1581 */
1582static inline int netif_carrier_ok(const struct net_device *dev)
1583{
1584 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1585}
1586
1587extern unsigned long dev_trans_start(struct net_device *dev);
1588
1589extern void __netdev_watchdog_up(struct net_device *dev);
1590
1591extern void netif_carrier_on(struct net_device *dev);
1592
1593extern void netif_carrier_off(struct net_device *dev);
1594
1595/**
1596 * netif_dormant_on - mark device as dormant.
1597 * @dev: network device
1598 *
1599 * Mark device as dormant (as per RFC2863).
1600 *
1601 * The dormant state indicates that the relevant interface is not
1602 * actually in a condition to pass packets (i.e., it is not 'up') but is
1603 * in a "pending" state, waiting for some external event. For "on-
1604 * demand" interfaces, this new state identifies the situation where the
1605 * interface is waiting for events to place it in the up state.
1606 *
1607 */
1608static inline void netif_dormant_on(struct net_device *dev)
1609{
1610 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1611 linkwatch_fire_event(dev);
1612}
1613
1614/**
1615 * netif_dormant_off - set device as not dormant.
1616 * @dev: network device
1617 *
1618 * Device is not in dormant state.
1619 */
1620static inline void netif_dormant_off(struct net_device *dev)
1621{
1622 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1623 linkwatch_fire_event(dev);
1624}
1625
1626/**
1627 * netif_dormant - test if carrier present
1628 * @dev: network device
1629 *
1630 * Check if carrier is present on device
1631 */
1632static inline int netif_dormant(const struct net_device *dev)
1633{
1634 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1635}
1636
1637
1638/**
1639 * netif_oper_up - test if device is operational
1640 * @dev: network device
1641 *
1642 * Check if carrier is operational
1643 */
1644static inline int netif_oper_up(const struct net_device *dev)
1645{
1646 return (dev->operstate == IF_OPER_UP ||
1647 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1648}
1649
1650/**
1651 * netif_device_present - is device available or removed
1652 * @dev: network device
1653 *
1654 * Check if device has not been removed from system.
1655 */
1656static inline int netif_device_present(struct net_device *dev)
1657{
1658 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1659}
1660
1661extern void netif_device_detach(struct net_device *dev);
1662
1663extern void netif_device_attach(struct net_device *dev);
1664
1665/*
1666 * Network interface message level settings
1667 */
1668#define HAVE_NETIF_MSG 1
1669
1670enum {
1671 NETIF_MSG_DRV = 0x0001,
1672 NETIF_MSG_PROBE = 0x0002,
1673 NETIF_MSG_LINK = 0x0004,
1674 NETIF_MSG_TIMER = 0x0008,
1675 NETIF_MSG_IFDOWN = 0x0010,
1676 NETIF_MSG_IFUP = 0x0020,
1677 NETIF_MSG_RX_ERR = 0x0040,
1678 NETIF_MSG_TX_ERR = 0x0080,
1679 NETIF_MSG_TX_QUEUED = 0x0100,
1680 NETIF_MSG_INTR = 0x0200,
1681 NETIF_MSG_TX_DONE = 0x0400,
1682 NETIF_MSG_RX_STATUS = 0x0800,
1683 NETIF_MSG_PKTDATA = 0x1000,
1684 NETIF_MSG_HW = 0x2000,
1685 NETIF_MSG_WOL = 0x4000,
1686};
1687
1688#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1689#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1690#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1691#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1692#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1693#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1694#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1695#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1696#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1697#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1698#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1699#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1700#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1701#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1702#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1703
1704static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1705{
1706 /* use default */
1707 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1708 return default_msg_enable_bits;
1709 if (debug_value == 0) /* no output */
1710 return 0;
1711 /* set low N bits */
1712 return (1 << debug_value) - 1;
1713}
1714
1715static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1716{
1717 spin_lock(&txq->_xmit_lock);
1718 txq->xmit_lock_owner = cpu;
1719}
1720
1721static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1722{
1723 spin_lock_bh(&txq->_xmit_lock);
1724 txq->xmit_lock_owner = smp_processor_id();
1725}
1726
1727static inline int __netif_tx_trylock(struct netdev_queue *txq)
1728{
1729 int ok = spin_trylock(&txq->_xmit_lock);
1730 if (likely(ok))
1731 txq->xmit_lock_owner = smp_processor_id();
1732 return ok;
1733}
1734
1735static inline void __netif_tx_unlock(struct netdev_queue *txq)
1736{
1737 txq->xmit_lock_owner = -1;
1738 spin_unlock(&txq->_xmit_lock);
1739}
1740
1741static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1742{
1743 txq->xmit_lock_owner = -1;
1744 spin_unlock_bh(&txq->_xmit_lock);
1745}
1746
1747static inline void txq_trans_update(struct netdev_queue *txq)
1748{
1749 if (txq->xmit_lock_owner != -1)
1750 txq->trans_start = jiffies;
1751}
1752
1753/**
1754 * netif_tx_lock - grab network device transmit lock
1755 * @dev: network device
1756 *
1757 * Get network device transmit lock
1758 */
1759static inline void netif_tx_lock(struct net_device *dev)
1760{
1761 unsigned int i;
1762 int cpu;
1763
1764 spin_lock(&dev->tx_global_lock);
1765 cpu = smp_processor_id();
1766 for (i = 0; i < dev->num_tx_queues; i++) {
1767 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1768
1769 /* We are the only thread of execution doing a
1770 * freeze, but we have to grab the _xmit_lock in
1771 * order to synchronize with threads which are in
1772 * the ->hard_start_xmit() handler and already
1773 * checked the frozen bit.
1774 */
1775 __netif_tx_lock(txq, cpu);
1776 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1777 __netif_tx_unlock(txq);
1778 }
1779}
1780
1781static inline void netif_tx_lock_bh(struct net_device *dev)
1782{
1783 local_bh_disable();
1784 netif_tx_lock(dev);
1785}
1786
1787static inline void netif_tx_unlock(struct net_device *dev)
1788{
1789 unsigned int i;
1790
1791 for (i = 0; i < dev->num_tx_queues; i++) {
1792 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1793
1794 /* No need to grab the _xmit_lock here. If the
1795 * queue is not stopped for another reason, we
1796 * force a schedule.
1797 */
1798 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1799 netif_schedule_queue(txq);
1800 }
1801 spin_unlock(&dev->tx_global_lock);
1802}
1803
1804static inline void netif_tx_unlock_bh(struct net_device *dev)
1805{
1806 netif_tx_unlock(dev);
1807 local_bh_enable();
1808}
1809
1810#define HARD_TX_LOCK(dev, txq, cpu) { \
1811 if ((dev->features & NETIF_F_LLTX) == 0) { \
1812 __netif_tx_lock(txq, cpu); \
1813 } \
1814}
1815
1816#define HARD_TX_UNLOCK(dev, txq) { \
1817 if ((dev->features & NETIF_F_LLTX) == 0) { \
1818 __netif_tx_unlock(txq); \
1819 } \
1820}
1821
1822static inline void netif_tx_disable(struct net_device *dev)
1823{
1824 unsigned int i;
1825 int cpu;
1826
1827 local_bh_disable();
1828 cpu = smp_processor_id();
1829 for (i = 0; i < dev->num_tx_queues; i++) {
1830 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1831
1832 __netif_tx_lock(txq, cpu);
1833 netif_tx_stop_queue(txq);
1834 __netif_tx_unlock(txq);
1835 }
1836 local_bh_enable();
1837}
1838
1839static inline void netif_addr_lock(struct net_device *dev)
1840{
1841 spin_lock(&dev->addr_list_lock);
1842}
1843
1844static inline void netif_addr_lock_bh(struct net_device *dev)
1845{
1846 spin_lock_bh(&dev->addr_list_lock);
1847}
1848
1849static inline void netif_addr_unlock(struct net_device *dev)
1850{
1851 spin_unlock(&dev->addr_list_lock);
1852}
1853
1854static inline void netif_addr_unlock_bh(struct net_device *dev)
1855{
1856 spin_unlock_bh(&dev->addr_list_lock);
1857}
1858
1859/*
1860 * dev_addrs walker. Should be used only for read access. Call with
1861 * rcu_read_lock held.
1862 */
1863#define for_each_dev_addr(dev, ha) \
1864 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
1865
1866/* These functions live elsewhere (drivers/net/net_init.c, but related) */
1867
1868extern void ether_setup(struct net_device *dev);
1869
1870/* Support for loadable net-drivers */
1871extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1872 void (*setup)(struct net_device *),
1873 unsigned int queue_count);
1874#define alloc_netdev(sizeof_priv, name, setup) \
1875 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1876extern int register_netdev(struct net_device *dev);
1877extern void unregister_netdev(struct net_device *dev);
1878
1879/* Functions used for device addresses handling */
1880extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
1881 unsigned char addr_type);
1882extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
1883 unsigned char addr_type);
1884extern int dev_addr_add_multiple(struct net_device *to_dev,
1885 struct net_device *from_dev,
1886 unsigned char addr_type);
1887extern int dev_addr_del_multiple(struct net_device *to_dev,
1888 struct net_device *from_dev,
1889 unsigned char addr_type);
1890
1891/* Functions used for secondary unicast and multicast support */
1892extern void dev_set_rx_mode(struct net_device *dev);
1893extern void __dev_set_rx_mode(struct net_device *dev);
1894extern int dev_unicast_delete(struct net_device *dev, void *addr);
1895extern int dev_unicast_add(struct net_device *dev, void *addr);
1896extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1897extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1898extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1899extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1900extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1901extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1902extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1903extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1904extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1905extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1906extern int dev_set_promiscuity(struct net_device *dev, int inc);
1907extern int dev_set_allmulti(struct net_device *dev, int inc);
1908extern void netdev_state_change(struct net_device *dev);
1909extern void netdev_bonding_change(struct net_device *dev,
1910 unsigned long event);
1911extern void netdev_features_change(struct net_device *dev);
1912/* Load a device via the kmod */
1913extern void dev_load(struct net *net, const char *name);
1914extern void dev_mcast_init(void);
1915extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1916
1917extern int netdev_max_backlog;
1918extern int weight_p;
1919extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1920extern int skb_checksum_help(struct sk_buff *skb);
1921extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1922#ifdef CONFIG_BUG
1923extern void netdev_rx_csum_fault(struct net_device *dev);
1924#else
1925static inline void netdev_rx_csum_fault(struct net_device *dev)
1926{
1927}
1928#endif
1929/* rx skb timestamps */
1930extern void net_enable_timestamp(void);
1931extern void net_disable_timestamp(void);
1932
1933#ifdef CONFIG_PROC_FS
1934extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1935extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1936extern void dev_seq_stop(struct seq_file *seq, void *v);
1937#endif
1938
1939extern int netdev_class_create_file(struct class_attribute *class_attr);
1940extern void netdev_class_remove_file(struct class_attribute *class_attr);
1941
1942extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1943
1944extern void linkwatch_run_queue(void);
1945
1946unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1947 unsigned long mask);
1948unsigned long netdev_fix_features(unsigned long features, const char *name);
1949
1950static inline int net_gso_ok(int features, int gso_type)
1951{
1952 int feature = gso_type << NETIF_F_GSO_SHIFT;
1953 return (features & feature) == feature;
1954}
1955
1956static inline int skb_gso_ok(struct sk_buff *skb, int features)
1957{
1958 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
1959 (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST));
1960}
1961
1962static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1963{
1964 return skb_is_gso(skb) &&
1965 (!skb_gso_ok(skb, dev->features) ||
1966 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1967}
1968
1969static inline void netif_set_gso_max_size(struct net_device *dev,
1970 unsigned int size)
1971{
1972 dev->gso_max_size = size;
1973}
1974
1975static inline void skb_bond_set_mac_by_master(struct sk_buff *skb,
1976 struct net_device *master)
1977{
1978 if (skb->pkt_type == PACKET_HOST) {
1979 u16 *dest = (u16 *) eth_hdr(skb)->h_dest;
1980
1981 memcpy(dest, master->dev_addr, ETH_ALEN);
1982 }
1983}
1984
1985/* On bonding slaves other than the currently active slave, suppress
1986 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1987 * ARP on active-backup slaves with arp_validate enabled.
1988 */
1989static inline int skb_bond_should_drop(struct sk_buff *skb)
1990{
1991 struct net_device *dev = skb->dev;
1992 struct net_device *master = dev->master;
1993
1994 if (master) {
1995 if (master->priv_flags & IFF_MASTER_ARPMON)
1996 dev->last_rx = jiffies;
1997
1998 if ((master->priv_flags & IFF_MASTER_ALB) && master->br_port) {
1999 /* Do address unmangle. The local destination address
2000 * will be always the one master has. Provides the right
2001 * functionality in a bridge.
2002 */
2003 skb_bond_set_mac_by_master(skb, master);
2004 }
2005
2006 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
2007 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
2008 skb->protocol == __cpu_to_be16(ETH_P_ARP))
2009 return 0;
2010
2011 if (master->priv_flags & IFF_MASTER_ALB) {
2012 if (skb->pkt_type != PACKET_BROADCAST &&
2013 skb->pkt_type != PACKET_MULTICAST)
2014 return 0;
2015 }
2016 if (master->priv_flags & IFF_MASTER_8023AD &&
2017 skb->protocol == __cpu_to_be16(ETH_P_SLOW))
2018 return 0;
2019
2020 return 1;
2021 }
2022 }
2023 return 0;
2024}
2025
2026extern struct pernet_operations __net_initdata loopback_net_ops;
2027
2028static inline int dev_ethtool_get_settings(struct net_device *dev,
2029 struct ethtool_cmd *cmd)
2030{
2031 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2032 return -EOPNOTSUPP;
2033 return dev->ethtool_ops->get_settings(dev, cmd);
2034}
2035
2036static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2037{
2038 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2039 return 0;
2040 return dev->ethtool_ops->get_rx_csum(dev);
2041}
2042
2043static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2044{
2045 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2046 return 0;
2047 return dev->ethtool_ops->get_flags(dev);
2048}
2049#endif /* __KERNEL__ */
2050
2051#endif /* _LINUX_NETDEVICE_H */
Clone of davem's net-next-2.6 tree