?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
net: use helpers to access uc list V2
[linux-2.6/kvm.git] / include / linux / netdevice.h
blob93a32a5ca74f8c727b16df52bc1a3d947660cef3
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
53 struct vlan_group;
54 struct netpoll_info;
55 /* 802.11 specific */
56 struct 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
103 enum 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 };
109 typedef 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 */
115 static 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
167 struct 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. */
201 enum {
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
216 struct neighbour;
217 struct neigh_parms;
218 struct sk_buff;
219
220 struct netif_rx_stats {
221 unsigned total;
222 unsigned dropped;
223 unsigned time_squeeze;
224 unsigned cpu_collision;
225 };
226
227 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
228
229 struct 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
248 struct 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
261 struct netdev_hw_addr_list {
262 struct list_head list;
263 int count;
264 };
265
266 #define netdev_uc_count(dev) ((dev)->uc.count)
267 #define netdev_uc_empty(dev) ((dev)->uc.count == 0)
268 #define netdev_for_each_uc_addr(ha, dev) \
269 list_for_each_entry(ha, &dev->uc.list, list)
270
271 struct hh_cache {
272 struct hh_cache *hh_next; /* Next entry */
273 atomic_t hh_refcnt; /* number of users */
274 /*
275 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
276 * cache line on SMP.
277 * They are mostly read, but hh_refcnt may be changed quite frequently,
278 * incurring cache line ping pongs.
279 */
280 __be16 hh_type ____cacheline_aligned_in_smp;
281 /* protocol identifier, f.e ETH_P_IP
282 * NOTE: For VLANs, this will be the
283 * encapuslated type. --BLG
284 */
285 u16 hh_len; /* length of header */
286 int (*hh_output)(struct sk_buff *skb);
287 seqlock_t hh_lock;
288
289 /* cached hardware header; allow for machine alignment needs. */
290 #define HH_DATA_MOD 16
291 #define HH_DATA_OFF(__len) \
292 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
293 #define HH_DATA_ALIGN(__len) \
294 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
295 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
296 };
297
298 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
299 * Alternative is:
300 * dev->hard_header_len ? (dev->hard_header_len +
301 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
302 *
303 * We could use other alignment values, but we must maintain the
304 * relationship HH alignment <= LL alignment.
305 *
306 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
307 * may need.
308 */
309 #define LL_RESERVED_SPACE(dev) \
310 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
311 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
312 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
313 #define LL_ALLOCATED_SPACE(dev) \
314 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
315
316 struct header_ops {
317 int (*create) (struct sk_buff *skb, struct net_device *dev,
318 unsigned short type, const void *daddr,
319 const void *saddr, unsigned len);
320 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
321 int (*rebuild)(struct sk_buff *skb);
322 #define HAVE_HEADER_CACHE
323 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
324 void (*cache_update)(struct hh_cache *hh,
325 const struct net_device *dev,
326 const unsigned char *haddr);
327 };
328
329 /* These flag bits are private to the generic network queueing
330 * layer, they may not be explicitly referenced by any other
331 * code.
332 */
333
334 enum netdev_state_t {
335 __LINK_STATE_START,
336 __LINK_STATE_PRESENT,
337 __LINK_STATE_NOCARRIER,
338 __LINK_STATE_LINKWATCH_PENDING,
339 __LINK_STATE_DORMANT,
340 };
341
342
343 /*
344 * This structure holds at boot time configured netdevice settings. They
345 * are then used in the device probing.
346 */
347 struct netdev_boot_setup {
348 char name[IFNAMSIZ];
349 struct ifmap map;
350 };
351 #define NETDEV_BOOT_SETUP_MAX 8
352
353 extern int __init netdev_boot_setup(char *str);
354
355 /*
356 * Structure for NAPI scheduling similar to tasklet but with weighting
357 */
358 struct napi_struct {
359 /* The poll_list must only be managed by the entity which
360 * changes the state of the NAPI_STATE_SCHED bit. This means
361 * whoever atomically sets that bit can add this napi_struct
362 * to the per-cpu poll_list, and whoever clears that bit
363 * can remove from the list right before clearing the bit.
364 */
365 struct list_head poll_list;
366
367 unsigned long state;
368 int weight;
369 int (*poll)(struct napi_struct *, int);
370 #ifdef CONFIG_NETPOLL
371 spinlock_t poll_lock;
372 int poll_owner;
373 #endif
374
375 unsigned int gro_count;
376
377 struct net_device *dev;
378 struct list_head dev_list;
379 struct sk_buff *gro_list;
380 struct sk_buff *skb;
381 };
382
383 enum {
384 NAPI_STATE_SCHED, /* Poll is scheduled */
385 NAPI_STATE_DISABLE, /* Disable pending */
386 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
387 };
388
389 enum gro_result {
390 GRO_MERGED,
391 GRO_MERGED_FREE,
392 GRO_HELD,
393 GRO_NORMAL,
394 GRO_DROP,
395 };
396 typedef enum gro_result gro_result_t;
397
398 extern void __napi_schedule(struct napi_struct *n);
399
400 static inline int napi_disable_pending(struct napi_struct *n)
401 {
402 return test_bit(NAPI_STATE_DISABLE, &n->state);
403 }
404
405 /**
406 * napi_schedule_prep - check if napi can be scheduled
407 * @n: napi context
408 *
409 * Test if NAPI routine is already running, and if not mark
410 * it as running. This is used as a condition variable
411 * insure only one NAPI poll instance runs. We also make
412 * sure there is no pending NAPI disable.
413 */
414 static inline int napi_schedule_prep(struct napi_struct *n)
415 {
416 return !napi_disable_pending(n) &&
417 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
418 }
419
420 /**
421 * napi_schedule - schedule NAPI poll
422 * @n: napi context
423 *
424 * Schedule NAPI poll routine to be called if it is not already
425 * running.
426 */
427 static inline void napi_schedule(struct napi_struct *n)
428 {
429 if (napi_schedule_prep(n))
430 __napi_schedule(n);
431 }
432
433 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
434 static inline int napi_reschedule(struct napi_struct *napi)
435 {
436 if (napi_schedule_prep(napi)) {
437 __napi_schedule(napi);
438 return 1;
439 }
440 return 0;
441 }
442
443 /**
444 * napi_complete - NAPI processing complete
445 * @n: napi context
446 *
447 * Mark NAPI processing as complete.
448 */
449 extern void __napi_complete(struct napi_struct *n);
450 extern void napi_complete(struct napi_struct *n);
451
452 /**
453 * napi_disable - prevent NAPI from scheduling
454 * @n: napi context
455 *
456 * Stop NAPI from being scheduled on this context.
457 * Waits till any outstanding processing completes.
458 */
459 static inline void napi_disable(struct napi_struct *n)
460 {
461 set_bit(NAPI_STATE_DISABLE, &n->state);
462 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
463 msleep(1);
464 clear_bit(NAPI_STATE_DISABLE, &n->state);
465 }
466
467 /**
468 * napi_enable - enable NAPI scheduling
469 * @n: napi context
470 *
471 * Resume NAPI from being scheduled on this context.
472 * Must be paired with napi_disable.
473 */
474 static inline void napi_enable(struct napi_struct *n)
475 {
476 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
477 smp_mb__before_clear_bit();
478 clear_bit(NAPI_STATE_SCHED, &n->state);
479 }
480
481 #ifdef CONFIG_SMP
482 /**
483 * napi_synchronize - wait until NAPI is not running
484 * @n: napi context
485 *
486 * Wait until NAPI is done being scheduled on this context.
487 * Waits till any outstanding processing completes but
488 * does not disable future activations.
489 */
490 static inline void napi_synchronize(const struct napi_struct *n)
491 {
492 while (test_bit(NAPI_STATE_SCHED, &n->state))
493 msleep(1);
494 }
495 #else
496 # define napi_synchronize(n) barrier()
497 #endif
498
499 enum netdev_queue_state_t {
500 __QUEUE_STATE_XOFF,
501 __QUEUE_STATE_FROZEN,
502 };
503
504 struct netdev_queue {
505 /*
506 * read mostly part
507 */
508 struct net_device *dev;
509 struct Qdisc *qdisc;
510 unsigned long state;
511 struct Qdisc *qdisc_sleeping;
512 /*
513 * write mostly part
514 */
515 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
516 int xmit_lock_owner;
517 /*
518 * please use this field instead of dev->trans_start
519 */
520 unsigned long trans_start;
521 unsigned long tx_bytes;
522 unsigned long tx_packets;
523 unsigned long tx_dropped;
524 } ____cacheline_aligned_in_smp;
525
526
527 /*
528 * This structure defines the management hooks for network devices.
529 * The following hooks can be defined; unless noted otherwise, they are
530 * optional and can be filled with a null pointer.
531 *
532 * int (*ndo_init)(struct net_device *dev);
533 * This function is called once when network device is registered.
534 * The network device can use this to any late stage initializaton
535 * or semantic validattion. It can fail with an error code which will
536 * be propogated back to register_netdev
537 *
538 * void (*ndo_uninit)(struct net_device *dev);
539 * This function is called when device is unregistered or when registration
540 * fails. It is not called if init fails.
541 *
542 * int (*ndo_open)(struct net_device *dev);
543 * This function is called when network device transistions to the up
544 * state.
545 *
546 * int (*ndo_stop)(struct net_device *dev);
547 * This function is called when network device transistions to the down
548 * state.
549 *
550 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
551 * struct net_device *dev);
552 * Called when a packet needs to be transmitted.
553 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
554 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
555 * Required can not be NULL.
556 *
557 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
558 * Called to decide which queue to when device supports multiple
559 * transmit queues.
560 *
561 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
562 * This function is called to allow device receiver to make
563 * changes to configuration when multicast or promiscious is enabled.
564 *
565 * void (*ndo_set_rx_mode)(struct net_device *dev);
566 * This function is called device changes address list filtering.
567 *
568 * void (*ndo_set_multicast_list)(struct net_device *dev);
569 * This function is called when the multicast address list changes.
570 *
571 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
572 * This function is called when the Media Access Control address
573 * needs to be changed. If this interface is not defined, the
574 * mac address can not be changed.
575 *
576 * int (*ndo_validate_addr)(struct net_device *dev);
577 * Test if Media Access Control address is valid for the device.
578 *
579 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
580 * Called when a user request an ioctl which can't be handled by
581 * the generic interface code. If not defined ioctl's return
582 * not supported error code.
583 *
584 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
585 * Used to set network devices bus interface parameters. This interface
586 * is retained for legacy reason, new devices should use the bus
587 * interface (PCI) for low level management.
588 *
589 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
590 * Called when a user wants to change the Maximum Transfer Unit
591 * of a device. If not defined, any request to change MTU will
592 * will return an error.
593 *
594 * void (*ndo_tx_timeout)(struct net_device *dev);
595 * Callback uses when the transmitter has not made any progress
596 * for dev->watchdog ticks.
597 *
598 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
599 * Called when a user wants to get the network device usage
600 * statistics. If not defined, the counters in dev->stats will
601 * be used.
602 *
603 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
604 * If device support VLAN receive accleration
605 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
606 * when vlan groups for the device changes. Note: grp is NULL
607 * if no vlan's groups are being used.
608 *
609 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
610 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
611 * this function is called when a VLAN id is registered.
612 *
613 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
614 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
615 * this function is called when a VLAN id is unregistered.
616 *
617 * void (*ndo_poll_controller)(struct net_device *dev);
618 */
619 #define HAVE_NET_DEVICE_OPS
620 struct net_device_ops {
621 int (*ndo_init)(struct net_device *dev);
622 void (*ndo_uninit)(struct net_device *dev);
623 int (*ndo_open)(struct net_device *dev);
624 int (*ndo_stop)(struct net_device *dev);
625 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
626 struct net_device *dev);
627 u16 (*ndo_select_queue)(struct net_device *dev,
628 struct sk_buff *skb);
629 void (*ndo_change_rx_flags)(struct net_device *dev,
630 int flags);
631 void (*ndo_set_rx_mode)(struct net_device *dev);
632 void (*ndo_set_multicast_list)(struct net_device *dev);
633 int (*ndo_set_mac_address)(struct net_device *dev,
634 void *addr);
635 int (*ndo_validate_addr)(struct net_device *dev);
636 int (*ndo_do_ioctl)(struct net_device *dev,
637 struct ifreq *ifr, int cmd);
638 int (*ndo_set_config)(struct net_device *dev,
639 struct ifmap *map);
640 int (*ndo_change_mtu)(struct net_device *dev,
641 int new_mtu);
642 int (*ndo_neigh_setup)(struct net_device *dev,
643 struct neigh_parms *);
644 void (*ndo_tx_timeout) (struct net_device *dev);
645
646 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
647
648 void (*ndo_vlan_rx_register)(struct net_device *dev,
649 struct vlan_group *grp);
650 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
651 unsigned short vid);
652 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
653 unsigned short vid);
654 #ifdef CONFIG_NET_POLL_CONTROLLER
655 void (*ndo_poll_controller)(struct net_device *dev);
656 #endif
657 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
658 int (*ndo_fcoe_enable)(struct net_device *dev);
659 int (*ndo_fcoe_disable)(struct net_device *dev);
660 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
661 u16 xid,
662 struct scatterlist *sgl,
663 unsigned int sgc);
664 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
665 u16 xid);
666 #define NETDEV_FCOE_WWNN 0
667 #define NETDEV_FCOE_WWPN 1
668 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
669 u64 *wwn, int type);
670 #endif
671 };
672
673 /*
674 * The DEVICE structure.
675 * Actually, this whole structure is a big mistake. It mixes I/O
676 * data with strictly "high-level" data, and it has to know about
677 * almost every data structure used in the INET module.
678 *
679 * FIXME: cleanup struct net_device such that network protocol info
680 * moves out.
681 */
682
683 struct net_device {
684
685 /*
686 * This is the first field of the "visible" part of this structure
687 * (i.e. as seen by users in the "Space.c" file). It is the name
688 * the interface.
689 */
690 char name[IFNAMSIZ];
691 /* device name hash chain */
692 struct hlist_node name_hlist;
693 /* snmp alias */
694 char *ifalias;
695
696 /*
697 * I/O specific fields
698 * FIXME: Merge these and struct ifmap into one
699 */
700 unsigned long mem_end; /* shared mem end */
701 unsigned long mem_start; /* shared mem start */
702 unsigned long base_addr; /* device I/O address */
703 unsigned int irq; /* device IRQ number */
704
705 /*
706 * Some hardware also needs these fields, but they are not
707 * part of the usual set specified in Space.c.
708 */
709
710 unsigned char if_port; /* Selectable AUI, TP,..*/
711 unsigned char dma; /* DMA channel */
712
713 unsigned long state;
714
715 struct list_head dev_list;
716 struct list_head napi_list;
717 struct list_head unreg_list;
718
719 /* Net device features */
720 unsigned long features;
721 #define NETIF_F_SG 1 /* Scatter/gather IO. */
722 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
723 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
724 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
725 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
726 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
727 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
728 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
729 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
730 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
731 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
732 #define NETIF_F_GSO 2048 /* Enable software GSO. */
733 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
734 /* do not use LLTX in new drivers */
735 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
736 #define NETIF_F_GRO 16384 /* Generic receive offload */
737 #define NETIF_F_LRO 32768 /* large receive offload */
738
739 /* the GSO_MASK reserves bits 16 through 23 */
740 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
741 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
742 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
743
744 /* Segmentation offload features */
745 #define NETIF_F_GSO_SHIFT 16
746 #define NETIF_F_GSO_MASK 0x00ff0000
747 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
748 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
749 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
750 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
751 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
752 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
753
754 /* List of features with software fallbacks. */
755 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
756
757
758 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
759 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
760 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
761 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
762
763 /*
764 * If one device supports one of these features, then enable them
765 * for all in netdev_increment_features.
766 */
767 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
768 NETIF_F_SG | NETIF_F_HIGHDMA | \
769 NETIF_F_FRAGLIST)
770
771 /* Interface index. Unique device identifier */
772 int ifindex;
773 int iflink;
774
775 struct net_device_stats stats;
776
777 #ifdef CONFIG_WIRELESS_EXT
778 /* List of functions to handle Wireless Extensions (instead of ioctl).
779 * See <net/iw_handler.h> for details. Jean II */
780 const struct iw_handler_def * wireless_handlers;
781 /* Instance data managed by the core of Wireless Extensions. */
782 struct iw_public_data * wireless_data;
783 #endif
784 /* Management operations */
785 const struct net_device_ops *netdev_ops;
786 const struct ethtool_ops *ethtool_ops;
787
788 /* Hardware header description */
789 const struct header_ops *header_ops;
790
791 unsigned int flags; /* interface flags (a la BSD) */
792 unsigned short gflags;
793 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
794 unsigned short padded; /* How much padding added by alloc_netdev() */
795
796 unsigned char operstate; /* RFC2863 operstate */
797 unsigned char link_mode; /* mapping policy to operstate */
798
799 unsigned mtu; /* interface MTU value */
800 unsigned short type; /* interface hardware type */
801 unsigned short hard_header_len; /* hardware hdr length */
802
803 /* extra head- and tailroom the hardware may need, but not in all cases
804 * can this be guaranteed, especially tailroom. Some cases also use
805 * LL_MAX_HEADER instead to allocate the skb.
806 */
807 unsigned short needed_headroom;
808 unsigned short needed_tailroom;
809
810 struct net_device *master; /* Pointer to master device of a group,
811 * which this device is member of.
812 */
813
814 /* Interface address info. */
815 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
816 unsigned char addr_len; /* hardware address length */
817 unsigned short dev_id; /* for shared network cards */
818
819 struct netdev_hw_addr_list uc; /* Secondary unicast
820 mac addresses */
821 int uc_promisc;
822 spinlock_t addr_list_lock;
823 struct dev_addr_list *mc_list; /* Multicast mac addresses */
824 int mc_count; /* Number of installed mcasts */
825 unsigned int promiscuity;
826 unsigned int allmulti;
827
828
829 /* Protocol specific pointers */
830
831 #ifdef CONFIG_NET_DSA
832 void *dsa_ptr; /* dsa specific data */
833 #endif
834 void *atalk_ptr; /* AppleTalk link */
835 void *ip_ptr; /* IPv4 specific data */
836 void *dn_ptr; /* DECnet specific data */
837 void *ip6_ptr; /* IPv6 specific data */
838 void *ec_ptr; /* Econet specific data */
839 void *ax25_ptr; /* AX.25 specific data */
840 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
841 assign before registering */
842
843 /*
844 * Cache line mostly used on receive path (including eth_type_trans())
845 */
846 unsigned long last_rx; /* Time of last Rx */
847 /* Interface address info used in eth_type_trans() */
848 unsigned char *dev_addr; /* hw address, (before bcast
849 because most packets are
850 unicast) */
851
852 struct netdev_hw_addr_list dev_addrs; /* list of device
853 hw addresses */
854
855 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
856
857 struct netdev_queue rx_queue;
858
859 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
860
861 /* Number of TX queues allocated at alloc_netdev_mq() time */
862 unsigned int num_tx_queues;
863
864 /* Number of TX queues currently active in device */
865 unsigned int real_num_tx_queues;
866
867 /* root qdisc from userspace point of view */
868 struct Qdisc *qdisc;
869
870 unsigned long tx_queue_len; /* Max frames per queue allowed */
871 spinlock_t tx_global_lock;
872 /*
873 * One part is mostly used on xmit path (device)
874 */
875 /* These may be needed for future network-power-down code. */
876
877 /*
878 * trans_start here is expensive for high speed devices on SMP,
879 * please use netdev_queue->trans_start instead.
880 */
881 unsigned long trans_start; /* Time (in jiffies) of last Tx */
882
883 int watchdog_timeo; /* used by dev_watchdog() */
884 struct timer_list watchdog_timer;
885
886 /* Number of references to this device */
887 atomic_t refcnt ____cacheline_aligned_in_smp;
888
889 /* delayed register/unregister */
890 struct list_head todo_list;
891 /* device index hash chain */
892 struct hlist_node index_hlist;
893
894 struct list_head link_watch_list;
895
896 /* register/unregister state machine */
897 enum { NETREG_UNINITIALIZED=0,
898 NETREG_REGISTERED, /* completed register_netdevice */
899 NETREG_UNREGISTERING, /* called unregister_netdevice */
900 NETREG_UNREGISTERED, /* completed unregister todo */
901 NETREG_RELEASED, /* called free_netdev */
902 NETREG_DUMMY, /* dummy device for NAPI poll */
903 } reg_state;
904
905 /* Called from unregister, can be used to call free_netdev */
906 void (*destructor)(struct net_device *dev);
907
908 #ifdef CONFIG_NETPOLL
909 struct netpoll_info *npinfo;
910 #endif
911
912 #ifdef CONFIG_NET_NS
913 /* Network namespace this network device is inside */
914 struct net *nd_net;
915 #endif
916
917 /* mid-layer private */
918 void *ml_priv;
919
920 /* bridge stuff */
921 struct net_bridge_port *br_port;
922 /* macvlan */
923 struct macvlan_port *macvlan_port;
924 /* GARP */
925 struct garp_port *garp_port;
926
927 /* class/net/name entry */
928 struct device dev;
929 /* space for optional device, statistics, and wireless sysfs groups */
930 const struct attribute_group *sysfs_groups[4];
931
932 /* rtnetlink link ops */
933 const struct rtnl_link_ops *rtnl_link_ops;
934
935 /* VLAN feature mask */
936 unsigned long vlan_features;
937
938 /* for setting kernel sock attribute on TCP connection setup */
939 #define GSO_MAX_SIZE 65536
940 unsigned int gso_max_size;
941
942 #ifdef CONFIG_DCB
943 /* Data Center Bridging netlink ops */
944 const struct dcbnl_rtnl_ops *dcbnl_ops;
945 #endif
946
947 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
948 /* max exchange id for FCoE LRO by ddp */
949 unsigned int fcoe_ddp_xid;
950 #endif
951 };
952 #define to_net_dev(d) container_of(d, struct net_device, dev)
953
954 #define NETDEV_ALIGN 32
955
956 static inline
957 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
958 unsigned int index)
959 {
960 return &dev->_tx[index];
961 }
962
963 static inline void netdev_for_each_tx_queue(struct net_device *dev,
964 void (*f)(struct net_device *,
965 struct netdev_queue *,
966 void *),
967 void *arg)
968 {
969 unsigned int i;
970
971 for (i = 0; i < dev->num_tx_queues; i++)
972 f(dev, &dev->_tx[i], arg);
973 }
974
975 /*
976 * Net namespace inlines
977 */
978 static inline
979 struct net *dev_net(const struct net_device *dev)
980 {
981 #ifdef CONFIG_NET_NS
982 return dev->nd_net;
983 #else
984 return &init_net;
985 #endif
986 }
987
988 static inline
989 void dev_net_set(struct net_device *dev, struct net *net)
990 {
991 #ifdef CONFIG_NET_NS
992 release_net(dev->nd_net);
993 dev->nd_net = hold_net(net);
994 #endif
995 }
996
997 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
998 {
999 #ifdef CONFIG_NET_DSA_TAG_DSA
1000 if (dev->dsa_ptr != NULL)
1001 return dsa_uses_dsa_tags(dev->dsa_ptr);
1002 #endif
1003
1004 return 0;
1005 }
1006
1007 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1008 {
1009 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1010 if (dev->dsa_ptr != NULL)
1011 return dsa_uses_trailer_tags(dev->dsa_ptr);
1012 #endif
1013
1014 return 0;
1015 }
1016
1017 /**
1018 * netdev_priv - access network device private data
1019 * @dev: network device
1020 *
1021 * Get network device private data
1022 */
1023 static inline void *netdev_priv(const struct net_device *dev)
1024 {
1025 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1026 }
1027
1028 /* Set the sysfs physical device reference for the network logical device
1029 * if set prior to registration will cause a symlink during initialization.
1030 */
1031 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1032
1033 /* Set the sysfs device type for the network logical device to allow
1034 * fin grained indentification of different network device types. For
1035 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1036 */
1037 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1038
1039 /**
1040 * netif_napi_add - initialize a napi context
1041 * @dev: network device
1042 * @napi: napi context
1043 * @poll: polling function
1044 * @weight: default weight
1045 *
1046 * netif_napi_add() must be used to initialize a napi context prior to calling
1047 * *any* of the other napi related functions.
1048 */
1049 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1050 int (*poll)(struct napi_struct *, int), int weight);
1051
1052 /**
1053 * netif_napi_del - remove a napi context
1054 * @napi: napi context
1055 *
1056 * netif_napi_del() removes a napi context from the network device napi list
1057 */
1058 void netif_napi_del(struct napi_struct *napi);
1059
1060 struct napi_gro_cb {
1061 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1062 void *frag0;
1063
1064 /* Length of frag0. */
1065 unsigned int frag0_len;
1066
1067 /* This indicates where we are processing relative to skb->data. */
1068 int data_offset;
1069
1070 /* This is non-zero if the packet may be of the same flow. */
1071 int same_flow;
1072
1073 /* This is non-zero if the packet cannot be merged with the new skb. */
1074 int flush;
1075
1076 /* Number of segments aggregated. */
1077 int count;
1078
1079 /* Free the skb? */
1080 int free;
1081 };
1082
1083 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1084
1085 struct packet_type {
1086 __be16 type; /* This is really htons(ether_type). */
1087 struct net_device *dev; /* NULL is wildcarded here */
1088 int (*func) (struct sk_buff *,
1089 struct net_device *,
1090 struct packet_type *,
1091 struct net_device *);
1092 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1093 int features);
1094 int (*gso_send_check)(struct sk_buff *skb);
1095 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1096 struct sk_buff *skb);
1097 int (*gro_complete)(struct sk_buff *skb);
1098 void *af_packet_priv;
1099 struct list_head list;
1100 };
1101
1102 #include <linux/interrupt.h>
1103 #include <linux/notifier.h>
1104
1105 extern rwlock_t dev_base_lock; /* Device list lock */
1106
1107
1108 #define for_each_netdev(net, d) \
1109 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1110 #define for_each_netdev_reverse(net, d) \
1111 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1112 #define for_each_netdev_rcu(net, d) \
1113 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1114 #define for_each_netdev_safe(net, d, n) \
1115 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1116 #define for_each_netdev_continue(net, d) \
1117 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1118 #define for_each_netdev_continue_rcu(net, d) \
1119 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1120 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1121
1122 static inline struct net_device *next_net_device(struct net_device *dev)
1123 {
1124 struct list_head *lh;
1125 struct net *net;
1126
1127 net = dev_net(dev);
1128 lh = dev->dev_list.next;
1129 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1130 }
1131
1132 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1133 {
1134 struct list_head *lh;
1135 struct net *net;
1136
1137 net = dev_net(dev);
1138 lh = rcu_dereference(dev->dev_list.next);
1139 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1140 }
1141
1142 static inline struct net_device *first_net_device(struct net *net)
1143 {
1144 return list_empty(&net->dev_base_head) ? NULL :
1145 net_device_entry(net->dev_base_head.next);
1146 }
1147
1148 extern int netdev_boot_setup_check(struct net_device *dev);
1149 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1150 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1151 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1152 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1153 extern void dev_add_pack(struct packet_type *pt);
1154 extern void dev_remove_pack(struct packet_type *pt);
1155 extern void __dev_remove_pack(struct packet_type *pt);
1156
1157 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1158 unsigned short mask);
1159 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1160 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1161 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1162 extern int dev_alloc_name(struct net_device *dev, const char *name);
1163 extern int dev_open(struct net_device *dev);
1164 extern int dev_close(struct net_device *dev);
1165 extern void dev_disable_lro(struct net_device *dev);
1166 extern int dev_queue_xmit(struct sk_buff *skb);
1167 extern int register_netdevice(struct net_device *dev);
1168 extern void unregister_netdevice_queue(struct net_device *dev,
1169 struct list_head *head);
1170 extern void unregister_netdevice_many(struct list_head *head);
1171 static inline void unregister_netdevice(struct net_device *dev)
1172 {
1173 unregister_netdevice_queue(dev, NULL);
1174 }
1175
1176 extern void free_netdev(struct net_device *dev);
1177 extern void synchronize_net(void);
1178 extern int register_netdevice_notifier(struct notifier_block *nb);
1179 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1180 extern int init_dummy_netdev(struct net_device *dev);
1181 extern void netdev_resync_ops(struct net_device *dev);
1182
1183 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1184 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1185 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1186 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1187 extern int dev_restart(struct net_device *dev);
1188 #ifdef CONFIG_NETPOLL_TRAP
1189 extern int netpoll_trap(void);
1190 #endif
1191 extern int skb_gro_receive(struct sk_buff **head,
1192 struct sk_buff *skb);
1193 extern void skb_gro_reset_offset(struct sk_buff *skb);
1194
1195 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1196 {
1197 return NAPI_GRO_CB(skb)->data_offset;
1198 }
1199
1200 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1201 {
1202 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1203 }
1204
1205 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1206 {
1207 NAPI_GRO_CB(skb)->data_offset += len;
1208 }
1209
1210 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1211 unsigned int offset)
1212 {
1213 return NAPI_GRO_CB(skb)->frag0 + offset;
1214 }
1215
1216 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1217 {
1218 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1219 }
1220
1221 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1222 unsigned int offset)
1223 {
1224 NAPI_GRO_CB(skb)->frag0 = NULL;
1225 NAPI_GRO_CB(skb)->frag0_len = 0;
1226 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1227 }
1228
1229 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1230 {
1231 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1232 }
1233
1234 static inline void *skb_gro_network_header(struct sk_buff *skb)
1235 {
1236 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1237 skb_network_offset(skb);
1238 }
1239
1240 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1241 unsigned short type,
1242 const void *daddr, const void *saddr,
1243 unsigned len)
1244 {
1245 if (!dev->header_ops || !dev->header_ops->create)
1246 return 0;
1247
1248 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1249 }
1250
1251 static inline int dev_parse_header(const struct sk_buff *skb,
1252 unsigned char *haddr)
1253 {
1254 const struct net_device *dev = skb->dev;
1255
1256 if (!dev->header_ops || !dev->header_ops->parse)
1257 return 0;
1258 return dev->header_ops->parse(skb, haddr);
1259 }
1260
1261 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1262 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1263 static inline int unregister_gifconf(unsigned int family)
1264 {
1265 return register_gifconf(family, NULL);
1266 }
1267
1268 /*
1269 * Incoming packets are placed on per-cpu queues so that
1270 * no locking is needed.
1271 */
1272 struct softnet_data {
1273 struct Qdisc *output_queue;
1274 struct sk_buff_head input_pkt_queue;
1275 struct list_head poll_list;
1276 struct sk_buff *completion_queue;
1277
1278 struct napi_struct backlog;
1279 };
1280
1281 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1282
1283 #define HAVE_NETIF_QUEUE
1284
1285 extern void __netif_schedule(struct Qdisc *q);
1286
1287 static inline void netif_schedule_queue(struct netdev_queue *txq)
1288 {
1289 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1290 __netif_schedule(txq->qdisc);
1291 }
1292
1293 static inline void netif_tx_schedule_all(struct net_device *dev)
1294 {
1295 unsigned int i;
1296
1297 for (i = 0; i < dev->num_tx_queues; i++)
1298 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1299 }
1300
1301 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1302 {
1303 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1304 }
1305
1306 /**
1307 * netif_start_queue - allow transmit
1308 * @dev: network device
1309 *
1310 * Allow upper layers to call the device hard_start_xmit routine.
1311 */
1312 static inline void netif_start_queue(struct net_device *dev)
1313 {
1314 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1315 }
1316
1317 static inline void netif_tx_start_all_queues(struct net_device *dev)
1318 {
1319 unsigned int i;
1320
1321 for (i = 0; i < dev->num_tx_queues; i++) {
1322 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1323 netif_tx_start_queue(txq);
1324 }
1325 }
1326
1327 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1328 {
1329 #ifdef CONFIG_NETPOLL_TRAP
1330 if (netpoll_trap()) {
1331 netif_tx_start_queue(dev_queue);
1332 return;
1333 }
1334 #endif
1335 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1336 __netif_schedule(dev_queue->qdisc);
1337 }
1338
1339 /**
1340 * netif_wake_queue - restart transmit
1341 * @dev: network device
1342 *
1343 * Allow upper layers to call the device hard_start_xmit routine.
1344 * Used for flow control when transmit resources are available.
1345 */
1346 static inline void netif_wake_queue(struct net_device *dev)
1347 {
1348 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1349 }
1350
1351 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1352 {
1353 unsigned int i;
1354
1355 for (i = 0; i < dev->num_tx_queues; i++) {
1356 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1357 netif_tx_wake_queue(txq);
1358 }
1359 }
1360
1361 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1362 {
1363 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1364 }
1365
1366 /**
1367 * netif_stop_queue - stop transmitted packets
1368 * @dev: network device
1369 *
1370 * Stop upper layers calling the device hard_start_xmit routine.
1371 * Used for flow control when transmit resources are unavailable.
1372 */
1373 static inline void netif_stop_queue(struct net_device *dev)
1374 {
1375 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1376 }
1377
1378 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1379 {
1380 unsigned int i;
1381
1382 for (i = 0; i < dev->num_tx_queues; i++) {
1383 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1384 netif_tx_stop_queue(txq);
1385 }
1386 }
1387
1388 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1389 {
1390 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1391 }
1392
1393 /**
1394 * netif_queue_stopped - test if transmit queue is flowblocked
1395 * @dev: network device
1396 *
1397 * Test if transmit queue on device is currently unable to send.
1398 */
1399 static inline int netif_queue_stopped(const struct net_device *dev)
1400 {
1401 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1402 }
1403
1404 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1405 {
1406 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1407 }
1408
1409 /**
1410 * netif_running - test if up
1411 * @dev: network device
1412 *
1413 * Test if the device has been brought up.
1414 */
1415 static inline int netif_running(const struct net_device *dev)
1416 {
1417 return test_bit(__LINK_STATE_START, &dev->state);
1418 }
1419
1420 /*
1421 * Routines to manage the subqueues on a device. We only need start
1422 * stop, and a check if it's stopped. All other device management is
1423 * done at the overall netdevice level.
1424 * Also test the device if we're multiqueue.
1425 */
1426
1427 /**
1428 * netif_start_subqueue - allow sending packets on subqueue
1429 * @dev: network device
1430 * @queue_index: sub queue index
1431 *
1432 * Start individual transmit queue of a device with multiple transmit queues.
1433 */
1434 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1435 {
1436 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1437
1438 netif_tx_start_queue(txq);
1439 }
1440
1441 /**
1442 * netif_stop_subqueue - stop sending packets on subqueue
1443 * @dev: network device
1444 * @queue_index: sub queue index
1445 *
1446 * Stop individual transmit queue of a device with multiple transmit queues.
1447 */
1448 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1449 {
1450 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1451 #ifdef CONFIG_NETPOLL_TRAP
1452 if (netpoll_trap())
1453 return;
1454 #endif
1455 netif_tx_stop_queue(txq);
1456 }
1457
1458 /**
1459 * netif_subqueue_stopped - test status of subqueue
1460 * @dev: network device
1461 * @queue_index: sub queue index
1462 *
1463 * Check individual transmit queue of a device with multiple transmit queues.
1464 */
1465 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1466 u16 queue_index)
1467 {
1468 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1469
1470 return netif_tx_queue_stopped(txq);
1471 }
1472
1473 static inline int netif_subqueue_stopped(const struct net_device *dev,
1474 struct sk_buff *skb)
1475 {
1476 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1477 }
1478
1479 /**
1480 * netif_wake_subqueue - allow sending packets on subqueue
1481 * @dev: network device
1482 * @queue_index: sub queue index
1483 *
1484 * Resume individual transmit queue of a device with multiple transmit queues.
1485 */
1486 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1487 {
1488 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1489 #ifdef CONFIG_NETPOLL_TRAP
1490 if (netpoll_trap())
1491 return;
1492 #endif
1493 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1494 __netif_schedule(txq->qdisc);
1495 }
1496
1497 /**
1498 * netif_is_multiqueue - test if device has multiple transmit queues
1499 * @dev: network device
1500 *
1501 * Check if device has multiple transmit queues
1502 */
1503 static inline int netif_is_multiqueue(const struct net_device *dev)
1504 {
1505 return (dev->num_tx_queues > 1);
1506 }
1507
1508 /* Use this variant when it is known for sure that it
1509 * is executing from hardware interrupt context or with hardware interrupts
1510 * disabled.
1511 */
1512 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1513
1514 /* Use this variant in places where it could be invoked
1515 * from either hardware interrupt or other context, with hardware interrupts
1516 * either disabled or enabled.
1517 */
1518 extern void dev_kfree_skb_any(struct sk_buff *skb);
1519
1520 #define HAVE_NETIF_RX 1
1521 extern int netif_rx(struct sk_buff *skb);
1522 extern int netif_rx_ni(struct sk_buff *skb);
1523 #define HAVE_NETIF_RECEIVE_SKB 1
1524 extern int netif_receive_skb(struct sk_buff *skb);
1525 extern gro_result_t dev_gro_receive(struct napi_struct *napi,
1526 struct sk_buff *skb);
1527 extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1528 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
1529 struct sk_buff *skb);
1530 extern void napi_reuse_skb(struct napi_struct *napi,
1531 struct sk_buff *skb);
1532 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1533 extern gro_result_t napi_frags_finish(struct napi_struct *napi,
1534 struct sk_buff *skb,
1535 gro_result_t ret);
1536 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1537 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
1538
1539 static inline void napi_free_frags(struct napi_struct *napi)
1540 {
1541 kfree_skb(napi->skb);
1542 napi->skb = NULL;
1543 }
1544
1545 extern void netif_nit_deliver(struct sk_buff *skb);
1546 extern int dev_valid_name(const char *name);
1547 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1548 extern int dev_ethtool(struct net *net, struct ifreq *);
1549 extern unsigned dev_get_flags(const struct net_device *);
1550 extern int dev_change_flags(struct net_device *, unsigned);
1551 extern int dev_change_name(struct net_device *, const char *);
1552 extern int dev_set_alias(struct net_device *, const char *, size_t);
1553 extern int dev_change_net_namespace(struct net_device *,
1554 struct net *, const char *);
1555 extern int dev_set_mtu(struct net_device *, int);
1556 extern int dev_set_mac_address(struct net_device *,
1557 struct sockaddr *);
1558 extern int dev_hard_start_xmit(struct sk_buff *skb,
1559 struct net_device *dev,
1560 struct netdev_queue *txq);
1561 extern int dev_forward_skb(struct net_device *dev,
1562 struct sk_buff *skb);
1563
1564 extern int netdev_budget;
1565
1566 /* Called by rtnetlink.c:rtnl_unlock() */
1567 extern void netdev_run_todo(void);
1568
1569 /**
1570 * dev_put - release reference to device
1571 * @dev: network device
1572 *
1573 * Release reference to device to allow it to be freed.
1574 */
1575 static inline void dev_put(struct net_device *dev)
1576 {
1577 atomic_dec(&dev->refcnt);
1578 }
1579
1580 /**
1581 * dev_hold - get reference to device
1582 * @dev: network device
1583 *
1584 * Hold reference to device to keep it from being freed.
1585 */
1586 static inline void dev_hold(struct net_device *dev)
1587 {
1588 atomic_inc(&dev->refcnt);
1589 }
1590
1591 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1592 * and _off may be called from IRQ context, but it is caller
1593 * who is responsible for serialization of these calls.
1594 *
1595 * The name carrier is inappropriate, these functions should really be
1596 * called netif_lowerlayer_*() because they represent the state of any
1597 * kind of lower layer not just hardware media.
1598 */
1599
1600 extern void linkwatch_fire_event(struct net_device *dev);
1601 extern void linkwatch_forget_dev(struct net_device *dev);
1602
1603 /**
1604 * netif_carrier_ok - test if carrier present
1605 * @dev: network device
1606 *
1607 * Check if carrier is present on device
1608 */
1609 static inline int netif_carrier_ok(const struct net_device *dev)
1610 {
1611 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1612 }
1613
1614 extern unsigned long dev_trans_start(struct net_device *dev);
1615
1616 extern void __netdev_watchdog_up(struct net_device *dev);
1617
1618 extern void netif_carrier_on(struct net_device *dev);
1619
1620 extern void netif_carrier_off(struct net_device *dev);
1621
1622 /**
1623 * netif_dormant_on - mark device as dormant.
1624 * @dev: network device
1625 *
1626 * Mark device as dormant (as per RFC2863).
1627 *
1628 * The dormant state indicates that the relevant interface is not
1629 * actually in a condition to pass packets (i.e., it is not 'up') but is
1630 * in a "pending" state, waiting for some external event. For "on-
1631 * demand" interfaces, this new state identifies the situation where the
1632 * interface is waiting for events to place it in the up state.
1633 *
1634 */
1635 static inline void netif_dormant_on(struct net_device *dev)
1636 {
1637 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1638 linkwatch_fire_event(dev);
1639 }
1640
1641 /**
1642 * netif_dormant_off - set device as not dormant.
1643 * @dev: network device
1644 *
1645 * Device is not in dormant state.
1646 */
1647 static inline void netif_dormant_off(struct net_device *dev)
1648 {
1649 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1650 linkwatch_fire_event(dev);
1651 }
1652
1653 /**
1654 * netif_dormant - test if carrier present
1655 * @dev: network device
1656 *
1657 * Check if carrier is present on device
1658 */
1659 static inline int netif_dormant(const struct net_device *dev)
1660 {
1661 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1662 }
1663
1664
1665 /**
1666 * netif_oper_up - test if device is operational
1667 * @dev: network device
1668 *
1669 * Check if carrier is operational
1670 */
1671 static inline int netif_oper_up(const struct net_device *dev)
1672 {
1673 return (dev->operstate == IF_OPER_UP ||
1674 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1675 }
1676
1677 /**
1678 * netif_device_present - is device available or removed
1679 * @dev: network device
1680 *
1681 * Check if device has not been removed from system.
1682 */
1683 static inline int netif_device_present(struct net_device *dev)
1684 {
1685 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1686 }
1687
1688 extern void netif_device_detach(struct net_device *dev);
1689
1690 extern void netif_device_attach(struct net_device *dev);
1691
1692 /*
1693 * Network interface message level settings
1694 */
1695 #define HAVE_NETIF_MSG 1
1696
1697 enum {
1698 NETIF_MSG_DRV = 0x0001,
1699 NETIF_MSG_PROBE = 0x0002,
1700 NETIF_MSG_LINK = 0x0004,
1701 NETIF_MSG_TIMER = 0x0008,
1702 NETIF_MSG_IFDOWN = 0x0010,
1703 NETIF_MSG_IFUP = 0x0020,
1704 NETIF_MSG_RX_ERR = 0x0040,
1705 NETIF_MSG_TX_ERR = 0x0080,
1706 NETIF_MSG_TX_QUEUED = 0x0100,
1707 NETIF_MSG_INTR = 0x0200,
1708 NETIF_MSG_TX_DONE = 0x0400,
1709 NETIF_MSG_RX_STATUS = 0x0800,
1710 NETIF_MSG_PKTDATA = 0x1000,
1711 NETIF_MSG_HW = 0x2000,
1712 NETIF_MSG_WOL = 0x4000,
1713 };
1714
1715 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1716 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1717 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1718 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1719 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1720 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1721 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1722 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1723 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1724 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1725 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1726 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1727 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1728 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1729 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1730
1731 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1732 {
1733 /* use default */
1734 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1735 return default_msg_enable_bits;
1736 if (debug_value == 0) /* no output */
1737 return 0;
1738 /* set low N bits */
1739 return (1 << debug_value) - 1;
1740 }
1741
1742 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1743 {
1744 spin_lock(&txq->_xmit_lock);
1745 txq->xmit_lock_owner = cpu;
1746 }
1747
1748 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1749 {
1750 spin_lock_bh(&txq->_xmit_lock);
1751 txq->xmit_lock_owner = smp_processor_id();
1752 }
1753
1754 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1755 {
1756 int ok = spin_trylock(&txq->_xmit_lock);
1757 if (likely(ok))
1758 txq->xmit_lock_owner = smp_processor_id();
1759 return ok;
1760 }
1761
1762 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1763 {
1764 txq->xmit_lock_owner = -1;
1765 spin_unlock(&txq->_xmit_lock);
1766 }
1767
1768 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1769 {
1770 txq->xmit_lock_owner = -1;
1771 spin_unlock_bh(&txq->_xmit_lock);
1772 }
1773
1774 static inline void txq_trans_update(struct netdev_queue *txq)
1775 {
1776 if (txq->xmit_lock_owner != -1)
1777 txq->trans_start = jiffies;
1778 }
1779
1780 /**
1781 * netif_tx_lock - grab network device transmit lock
1782 * @dev: network device
1783 *
1784 * Get network device transmit lock
1785 */
1786 static inline void netif_tx_lock(struct net_device *dev)
1787 {
1788 unsigned int i;
1789 int cpu;
1790
1791 spin_lock(&dev->tx_global_lock);
1792 cpu = smp_processor_id();
1793 for (i = 0; i < dev->num_tx_queues; i++) {
1794 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1795
1796 /* We are the only thread of execution doing a
1797 * freeze, but we have to grab the _xmit_lock in
1798 * order to synchronize with threads which are in
1799 * the ->hard_start_xmit() handler and already
1800 * checked the frozen bit.
1801 */
1802 __netif_tx_lock(txq, cpu);
1803 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1804 __netif_tx_unlock(txq);
1805 }
1806 }
1807
1808 static inline void netif_tx_lock_bh(struct net_device *dev)
1809 {
1810 local_bh_disable();
1811 netif_tx_lock(dev);
1812 }
1813
1814 static inline void netif_tx_unlock(struct net_device *dev)
1815 {
1816 unsigned int i;
1817
1818 for (i = 0; i < dev->num_tx_queues; i++) {
1819 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1820
1821 /* No need to grab the _xmit_lock here. If the
1822 * queue is not stopped for another reason, we
1823 * force a schedule.
1824 */
1825 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1826 netif_schedule_queue(txq);
1827 }
1828 spin_unlock(&dev->tx_global_lock);
1829 }
1830
1831 static inline void netif_tx_unlock_bh(struct net_device *dev)
1832 {
1833 netif_tx_unlock(dev);
1834 local_bh_enable();
1835 }
1836
1837 #define HARD_TX_LOCK(dev, txq, cpu) { \
1838 if ((dev->features & NETIF_F_LLTX) == 0) { \
1839 __netif_tx_lock(txq, cpu); \
1840 } \
1841 }
1842
1843 #define HARD_TX_UNLOCK(dev, txq) { \
1844 if ((dev->features & NETIF_F_LLTX) == 0) { \
1845 __netif_tx_unlock(txq); \
1846 } \
1847 }
1848
1849 static inline void netif_tx_disable(struct net_device *dev)
1850 {
1851 unsigned int i;
1852 int cpu;
1853
1854 local_bh_disable();
1855 cpu = smp_processor_id();
1856 for (i = 0; i < dev->num_tx_queues; i++) {
1857 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1858
1859 __netif_tx_lock(txq, cpu);
1860 netif_tx_stop_queue(txq);
1861 __netif_tx_unlock(txq);
1862 }
1863 local_bh_enable();
1864 }
1865
1866 static inline void netif_addr_lock(struct net_device *dev)
1867 {
1868 spin_lock(&dev->addr_list_lock);
1869 }
1870
1871 static inline void netif_addr_lock_bh(struct net_device *dev)
1872 {
1873 spin_lock_bh(&dev->addr_list_lock);
1874 }
1875
1876 static inline void netif_addr_unlock(struct net_device *dev)
1877 {
1878 spin_unlock(&dev->addr_list_lock);
1879 }
1880
1881 static inline void netif_addr_unlock_bh(struct net_device *dev)
1882 {
1883 spin_unlock_bh(&dev->addr_list_lock);
1884 }
1885
1886 /*
1887 * dev_addrs walker. Should be used only for read access. Call with
1888 * rcu_read_lock held.
1889 */
1890 #define for_each_dev_addr(dev, ha) \
1891 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
1892
1893 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1894
1895 extern void ether_setup(struct net_device *dev);
1896
1897 /* Support for loadable net-drivers */
1898 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1899 void (*setup)(struct net_device *),
1900 unsigned int queue_count);
1901 #define alloc_netdev(sizeof_priv, name, setup) \
1902 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1903 extern int register_netdev(struct net_device *dev);
1904 extern void unregister_netdev(struct net_device *dev);
1905
1906 /* Functions used for device addresses handling */
1907 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
1908 unsigned char addr_type);
1909 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
1910 unsigned char addr_type);
1911 extern int dev_addr_add_multiple(struct net_device *to_dev,
1912 struct net_device *from_dev,
1913 unsigned char addr_type);
1914 extern int dev_addr_del_multiple(struct net_device *to_dev,
1915 struct net_device *from_dev,
1916 unsigned char addr_type);
1917
1918 /* Functions used for secondary unicast and multicast support */
1919 extern void dev_set_rx_mode(struct net_device *dev);
1920 extern void __dev_set_rx_mode(struct net_device *dev);
1921 extern int dev_unicast_delete(struct net_device *dev, void *addr);
1922 extern int dev_unicast_add(struct net_device *dev, void *addr);
1923 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1924 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1925 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1926 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1927 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1928 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1929 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1930 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1931 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1932 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1933 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1934 extern int dev_set_allmulti(struct net_device *dev, int inc);
1935 extern void netdev_state_change(struct net_device *dev);
1936 extern void netdev_bonding_change(struct net_device *dev,
1937 unsigned long event);
1938 extern void netdev_features_change(struct net_device *dev);
1939 /* Load a device via the kmod */
1940 extern void dev_load(struct net *net, const char *name);
1941 extern void dev_mcast_init(void);
1942 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1943 extern void dev_txq_stats_fold(const struct net_device *dev, struct net_device_stats *stats);
1944
1945 extern int netdev_max_backlog;
1946 extern int weight_p;
1947 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1948 extern int skb_checksum_help(struct sk_buff *skb);
1949 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1950 #ifdef CONFIG_BUG
1951 extern void netdev_rx_csum_fault(struct net_device *dev);
1952 #else
1953 static inline void netdev_rx_csum_fault(struct net_device *dev)
1954 {
1955 }
1956 #endif
1957 /* rx skb timestamps */
1958 extern void net_enable_timestamp(void);
1959 extern void net_disable_timestamp(void);
1960
1961 #ifdef CONFIG_PROC_FS
1962 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1963 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1964 extern void dev_seq_stop(struct seq_file *seq, void *v);
1965 #endif
1966
1967 extern int netdev_class_create_file(struct class_attribute *class_attr);
1968 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1969
1970 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1971
1972 extern void linkwatch_run_queue(void);
1973
1974 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1975 unsigned long mask);
1976 unsigned long netdev_fix_features(unsigned long features, const char *name);
1977
1978 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
1979 struct net_device *dev);
1980
1981 static inline int net_gso_ok(int features, int gso_type)
1982 {
1983 int feature = gso_type << NETIF_F_GSO_SHIFT;
1984 return (features & feature) == feature;
1985 }
1986
1987 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1988 {
1989 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
1990 (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST));
1991 }
1992
1993 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1994 {
1995 return skb_is_gso(skb) &&
1996 (!skb_gso_ok(skb, dev->features) ||
1997 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1998 }
1999
2000 static inline void netif_set_gso_max_size(struct net_device *dev,
2001 unsigned int size)
2002 {
2003 dev->gso_max_size = size;
2004 }
2005
2006 static inline void skb_bond_set_mac_by_master(struct sk_buff *skb,
2007 struct net_device *master)
2008 {
2009 if (skb->pkt_type == PACKET_HOST) {
2010 u16 *dest = (u16 *) eth_hdr(skb)->h_dest;
2011
2012 memcpy(dest, master->dev_addr, ETH_ALEN);
2013 }
2014 }
2015
2016 /* On bonding slaves other than the currently active slave, suppress
2017 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
2018 * ARP on active-backup slaves with arp_validate enabled.
2019 */
2020 static inline int skb_bond_should_drop(struct sk_buff *skb)
2021 {
2022 struct net_device *dev = skb->dev;
2023 struct net_device *master = dev->master;
2024
2025 if (master) {
2026 if (master->priv_flags & IFF_MASTER_ARPMON)
2027 dev->last_rx = jiffies;
2028
2029 if ((master->priv_flags & IFF_MASTER_ALB) && master->br_port) {
2030 /* Do address unmangle. The local destination address
2031 * will be always the one master has. Provides the right
2032 * functionality in a bridge.
2033 */
2034 skb_bond_set_mac_by_master(skb, master);
2035 }
2036
2037 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
2038 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
2039 skb->protocol == __cpu_to_be16(ETH_P_ARP))
2040 return 0;
2041
2042 if (master->priv_flags & IFF_MASTER_ALB) {
2043 if (skb->pkt_type != PACKET_BROADCAST &&
2044 skb->pkt_type != PACKET_MULTICAST)
2045 return 0;
2046 }
2047 if (master->priv_flags & IFF_MASTER_8023AD &&
2048 skb->protocol == __cpu_to_be16(ETH_P_SLOW))
2049 return 0;
2050
2051 return 1;
2052 }
2053 }
2054 return 0;
2055 }
2056
2057 extern struct pernet_operations __net_initdata loopback_net_ops;
2058
2059 static inline int dev_ethtool_get_settings(struct net_device *dev,
2060 struct ethtool_cmd *cmd)
2061 {
2062 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2063 return -EOPNOTSUPP;
2064 return dev->ethtool_ops->get_settings(dev, cmd);
2065 }
2066
2067 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2068 {
2069 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2070 return 0;
2071 return dev->ethtool_ops->get_rx_csum(dev);
2072 }
2073
2074 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2075 {
2076 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2077 return 0;
2078 return dev->ethtool_ops->get_flags(dev);
2079 }
2080 #endif /* __KERNEL__ */
2081
2082 #endif /* _LINUX_NETDEVICE_H */
kernel-based virtual machine