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net: Introduce for_each_netdev_rcu() iterator
[linux-2.6/kvm.git] / include / linux / netdevice.h
blob5077de02831761e24ff11fd0dc8e0534e364f1b3
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 #define NET_XMIT_SUCCESS 0
67 #define NET_XMIT_DROP 1 /* skb dropped */
68 #define NET_XMIT_CN 2 /* congestion notification */
69 #define NET_XMIT_POLICED 3 /* skb is shot by police */
70 #define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */
71
72 /* Backlog congestion levels */
73 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
74 #define NET_RX_DROP 1 /* packet dropped */
75
76 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
77 * indicates that the device will soon be dropping packets, or already drops
78 * some packets of the same priority; prompting us to send less aggressively. */
79 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
80 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
81
82 /* Driver transmit return codes */
83 enum netdev_tx {
84 NETDEV_TX_OK = 0, /* driver took care of packet */
85 NETDEV_TX_BUSY, /* driver tx path was busy*/
86 NETDEV_TX_LOCKED = -1, /* driver tx lock was already taken */
87 };
88 typedef enum netdev_tx netdev_tx_t;
89
90 #endif
91
92 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
93
94 #ifdef __KERNEL__
95 /*
96 * Compute the worst case header length according to the protocols
97 * used.
98 */
99
100 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
101 # if defined(CONFIG_MAC80211_MESH)
102 # define LL_MAX_HEADER 128
103 # else
104 # define LL_MAX_HEADER 96
105 # endif
106 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
107 # define LL_MAX_HEADER 48
108 #else
109 # define LL_MAX_HEADER 32
110 #endif
111
112 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
113 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
114 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
115 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
116 #define MAX_HEADER LL_MAX_HEADER
117 #else
118 #define MAX_HEADER (LL_MAX_HEADER + 48)
119 #endif
120
121 #endif /* __KERNEL__ */
122
123 /*
124 * Network device statistics. Akin to the 2.0 ether stats but
125 * with byte counters.
126 */
127
128 struct net_device_stats
129 {
130 unsigned long rx_packets; /* total packets received */
131 unsigned long tx_packets; /* total packets transmitted */
132 unsigned long rx_bytes; /* total bytes received */
133 unsigned long tx_bytes; /* total bytes transmitted */
134 unsigned long rx_errors; /* bad packets received */
135 unsigned long tx_errors; /* packet transmit problems */
136 unsigned long rx_dropped; /* no space in linux buffers */
137 unsigned long tx_dropped; /* no space available in linux */
138 unsigned long multicast; /* multicast packets received */
139 unsigned long collisions;
140
141 /* detailed rx_errors: */
142 unsigned long rx_length_errors;
143 unsigned long rx_over_errors; /* receiver ring buff overflow */
144 unsigned long rx_crc_errors; /* recved pkt with crc error */
145 unsigned long rx_frame_errors; /* recv'd frame alignment error */
146 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
147 unsigned long rx_missed_errors; /* receiver missed packet */
148
149 /* detailed tx_errors */
150 unsigned long tx_aborted_errors;
151 unsigned long tx_carrier_errors;
152 unsigned long tx_fifo_errors;
153 unsigned long tx_heartbeat_errors;
154 unsigned long tx_window_errors;
155
156 /* for cslip etc */
157 unsigned long rx_compressed;
158 unsigned long tx_compressed;
159 };
160
161
162 /* Media selection options. */
163 enum {
164 IF_PORT_UNKNOWN = 0,
165 IF_PORT_10BASE2,
166 IF_PORT_10BASET,
167 IF_PORT_AUI,
168 IF_PORT_100BASET,
169 IF_PORT_100BASETX,
170 IF_PORT_100BASEFX
171 };
172
173 #ifdef __KERNEL__
174
175 #include <linux/cache.h>
176 #include <linux/skbuff.h>
177
178 struct neighbour;
179 struct neigh_parms;
180 struct sk_buff;
181
182 struct netif_rx_stats
183 {
184 unsigned total;
185 unsigned dropped;
186 unsigned time_squeeze;
187 unsigned cpu_collision;
188 };
189
190 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
191
192 struct dev_addr_list
193 {
194 struct dev_addr_list *next;
195 u8 da_addr[MAX_ADDR_LEN];
196 u8 da_addrlen;
197 u8 da_synced;
198 int da_users;
199 int da_gusers;
200 };
201
202 /*
203 * We tag multicasts with these structures.
204 */
205
206 #define dev_mc_list dev_addr_list
207 #define dmi_addr da_addr
208 #define dmi_addrlen da_addrlen
209 #define dmi_users da_users
210 #define dmi_gusers da_gusers
211
212 struct netdev_hw_addr {
213 struct list_head list;
214 unsigned char addr[MAX_ADDR_LEN];
215 unsigned char type;
216 #define NETDEV_HW_ADDR_T_LAN 1
217 #define NETDEV_HW_ADDR_T_SAN 2
218 #define NETDEV_HW_ADDR_T_SLAVE 3
219 #define NETDEV_HW_ADDR_T_UNICAST 4
220 int refcount;
221 bool synced;
222 struct rcu_head rcu_head;
223 };
224
225 struct netdev_hw_addr_list {
226 struct list_head list;
227 int count;
228 };
229
230 struct hh_cache
231 {
232 struct hh_cache *hh_next; /* Next entry */
233 atomic_t hh_refcnt; /* number of users */
234 /*
235 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
236 * cache line on SMP.
237 * They are mostly read, but hh_refcnt may be changed quite frequently,
238 * incurring cache line ping pongs.
239 */
240 __be16 hh_type ____cacheline_aligned_in_smp;
241 /* protocol identifier, f.e ETH_P_IP
242 * NOTE: For VLANs, this will be the
243 * encapuslated type. --BLG
244 */
245 u16 hh_len; /* length of header */
246 int (*hh_output)(struct sk_buff *skb);
247 seqlock_t hh_lock;
248
249 /* cached hardware header; allow for machine alignment needs. */
250 #define HH_DATA_MOD 16
251 #define HH_DATA_OFF(__len) \
252 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
253 #define HH_DATA_ALIGN(__len) \
254 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
255 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
256 };
257
258 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
259 * Alternative is:
260 * dev->hard_header_len ? (dev->hard_header_len +
261 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
262 *
263 * We could use other alignment values, but we must maintain the
264 * relationship HH alignment <= LL alignment.
265 *
266 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
267 * may need.
268 */
269 #define LL_RESERVED_SPACE(dev) \
270 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
271 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
272 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
273 #define LL_ALLOCATED_SPACE(dev) \
274 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
275
276 struct header_ops {
277 int (*create) (struct sk_buff *skb, struct net_device *dev,
278 unsigned short type, const void *daddr,
279 const void *saddr, unsigned len);
280 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
281 int (*rebuild)(struct sk_buff *skb);
282 #define HAVE_HEADER_CACHE
283 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
284 void (*cache_update)(struct hh_cache *hh,
285 const struct net_device *dev,
286 const unsigned char *haddr);
287 };
288
289 /* These flag bits are private to the generic network queueing
290 * layer, they may not be explicitly referenced by any other
291 * code.
292 */
293
294 enum netdev_state_t
295 {
296 __LINK_STATE_START,
297 __LINK_STATE_PRESENT,
298 __LINK_STATE_NOCARRIER,
299 __LINK_STATE_LINKWATCH_PENDING,
300 __LINK_STATE_DORMANT,
301 };
302
303
304 /*
305 * This structure holds at boot time configured netdevice settings. They
306 * are then used in the device probing.
307 */
308 struct netdev_boot_setup {
309 char name[IFNAMSIZ];
310 struct ifmap map;
311 };
312 #define NETDEV_BOOT_SETUP_MAX 8
313
314 extern int __init netdev_boot_setup(char *str);
315
316 /*
317 * Structure for NAPI scheduling similar to tasklet but with weighting
318 */
319 struct napi_struct {
320 /* The poll_list must only be managed by the entity which
321 * changes the state of the NAPI_STATE_SCHED bit. This means
322 * whoever atomically sets that bit can add this napi_struct
323 * to the per-cpu poll_list, and whoever clears that bit
324 * can remove from the list right before clearing the bit.
325 */
326 struct list_head poll_list;
327
328 unsigned long state;
329 int weight;
330 int (*poll)(struct napi_struct *, int);
331 #ifdef CONFIG_NETPOLL
332 spinlock_t poll_lock;
333 int poll_owner;
334 #endif
335
336 unsigned int gro_count;
337
338 struct net_device *dev;
339 struct list_head dev_list;
340 struct sk_buff *gro_list;
341 struct sk_buff *skb;
342 };
343
344 enum
345 {
346 NAPI_STATE_SCHED, /* Poll is scheduled */
347 NAPI_STATE_DISABLE, /* Disable pending */
348 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
349 };
350
351 enum gro_result {
352 GRO_MERGED,
353 GRO_MERGED_FREE,
354 GRO_HELD,
355 GRO_NORMAL,
356 GRO_DROP,
357 };
358 typedef enum gro_result gro_result_t;
359
360 extern void __napi_schedule(struct napi_struct *n);
361
362 static inline int napi_disable_pending(struct napi_struct *n)
363 {
364 return test_bit(NAPI_STATE_DISABLE, &n->state);
365 }
366
367 /**
368 * napi_schedule_prep - check if napi can be scheduled
369 * @n: napi context
370 *
371 * Test if NAPI routine is already running, and if not mark
372 * it as running. This is used as a condition variable
373 * insure only one NAPI poll instance runs. We also make
374 * sure there is no pending NAPI disable.
375 */
376 static inline int napi_schedule_prep(struct napi_struct *n)
377 {
378 return !napi_disable_pending(n) &&
379 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
380 }
381
382 /**
383 * napi_schedule - schedule NAPI poll
384 * @n: napi context
385 *
386 * Schedule NAPI poll routine to be called if it is not already
387 * running.
388 */
389 static inline void napi_schedule(struct napi_struct *n)
390 {
391 if (napi_schedule_prep(n))
392 __napi_schedule(n);
393 }
394
395 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
396 static inline int napi_reschedule(struct napi_struct *napi)
397 {
398 if (napi_schedule_prep(napi)) {
399 __napi_schedule(napi);
400 return 1;
401 }
402 return 0;
403 }
404
405 /**
406 * napi_complete - NAPI processing complete
407 * @n: napi context
408 *
409 * Mark NAPI processing as complete.
410 */
411 extern void __napi_complete(struct napi_struct *n);
412 extern void napi_complete(struct napi_struct *n);
413
414 /**
415 * napi_disable - prevent NAPI from scheduling
416 * @n: napi context
417 *
418 * Stop NAPI from being scheduled on this context.
419 * Waits till any outstanding processing completes.
420 */
421 static inline void napi_disable(struct napi_struct *n)
422 {
423 set_bit(NAPI_STATE_DISABLE, &n->state);
424 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
425 msleep(1);
426 clear_bit(NAPI_STATE_DISABLE, &n->state);
427 }
428
429 /**
430 * napi_enable - enable NAPI scheduling
431 * @n: napi context
432 *
433 * Resume NAPI from being scheduled on this context.
434 * Must be paired with napi_disable.
435 */
436 static inline void napi_enable(struct napi_struct *n)
437 {
438 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
439 smp_mb__before_clear_bit();
440 clear_bit(NAPI_STATE_SCHED, &n->state);
441 }
442
443 #ifdef CONFIG_SMP
444 /**
445 * napi_synchronize - wait until NAPI is not running
446 * @n: napi context
447 *
448 * Wait until NAPI is done being scheduled on this context.
449 * Waits till any outstanding processing completes but
450 * does not disable future activations.
451 */
452 static inline void napi_synchronize(const struct napi_struct *n)
453 {
454 while (test_bit(NAPI_STATE_SCHED, &n->state))
455 msleep(1);
456 }
457 #else
458 # define napi_synchronize(n) barrier()
459 #endif
460
461 enum netdev_queue_state_t
462 {
463 __QUEUE_STATE_XOFF,
464 __QUEUE_STATE_FROZEN,
465 };
466
467 struct netdev_queue {
468 /*
469 * read mostly part
470 */
471 struct net_device *dev;
472 struct Qdisc *qdisc;
473 unsigned long state;
474 struct Qdisc *qdisc_sleeping;
475 /*
476 * write mostly part
477 */
478 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
479 int xmit_lock_owner;
480 /*
481 * please use this field instead of dev->trans_start
482 */
483 unsigned long trans_start;
484 unsigned long tx_bytes;
485 unsigned long tx_packets;
486 unsigned long tx_dropped;
487 } ____cacheline_aligned_in_smp;
488
489
490 /*
491 * This structure defines the management hooks for network devices.
492 * The following hooks can be defined; unless noted otherwise, they are
493 * optional and can be filled with a null pointer.
494 *
495 * int (*ndo_init)(struct net_device *dev);
496 * This function is called once when network device is registered.
497 * The network device can use this to any late stage initializaton
498 * or semantic validattion. It can fail with an error code which will
499 * be propogated back to register_netdev
500 *
501 * void (*ndo_uninit)(struct net_device *dev);
502 * This function is called when device is unregistered or when registration
503 * fails. It is not called if init fails.
504 *
505 * int (*ndo_open)(struct net_device *dev);
506 * This function is called when network device transistions to the up
507 * state.
508 *
509 * int (*ndo_stop)(struct net_device *dev);
510 * This function is called when network device transistions to the down
511 * state.
512 *
513 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
514 * struct net_device *dev);
515 * Called when a packet needs to be transmitted.
516 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
517 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
518 * Required can not be NULL.
519 *
520 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
521 * Called to decide which queue to when device supports multiple
522 * transmit queues.
523 *
524 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
525 * This function is called to allow device receiver to make
526 * changes to configuration when multicast or promiscious is enabled.
527 *
528 * void (*ndo_set_rx_mode)(struct net_device *dev);
529 * This function is called device changes address list filtering.
530 *
531 * void (*ndo_set_multicast_list)(struct net_device *dev);
532 * This function is called when the multicast address list changes.
533 *
534 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
535 * This function is called when the Media Access Control address
536 * needs to be changed. If this interface is not defined, the
537 * mac address can not be changed.
538 *
539 * int (*ndo_validate_addr)(struct net_device *dev);
540 * Test if Media Access Control address is valid for the device.
541 *
542 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
543 * Called when a user request an ioctl which can't be handled by
544 * the generic interface code. If not defined ioctl's return
545 * not supported error code.
546 *
547 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
548 * Used to set network devices bus interface parameters. This interface
549 * is retained for legacy reason, new devices should use the bus
550 * interface (PCI) for low level management.
551 *
552 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
553 * Called when a user wants to change the Maximum Transfer Unit
554 * of a device. If not defined, any request to change MTU will
555 * will return an error.
556 *
557 * void (*ndo_tx_timeout)(struct net_device *dev);
558 * Callback uses when the transmitter has not made any progress
559 * for dev->watchdog ticks.
560 *
561 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
562 * Called when a user wants to get the network device usage
563 * statistics. If not defined, the counters in dev->stats will
564 * be used.
565 *
566 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
567 * If device support VLAN receive accleration
568 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
569 * when vlan groups for the device changes. Note: grp is NULL
570 * if no vlan's groups are being used.
571 *
572 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
573 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
574 * this function is called when a VLAN id is registered.
575 *
576 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
577 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
578 * this function is called when a VLAN id is unregistered.
579 *
580 * void (*ndo_poll_controller)(struct net_device *dev);
581 */
582 #define HAVE_NET_DEVICE_OPS
583 struct net_device_ops {
584 int (*ndo_init)(struct net_device *dev);
585 void (*ndo_uninit)(struct net_device *dev);
586 int (*ndo_open)(struct net_device *dev);
587 int (*ndo_stop)(struct net_device *dev);
588 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
589 struct net_device *dev);
590 u16 (*ndo_select_queue)(struct net_device *dev,
591 struct sk_buff *skb);
592 #define HAVE_CHANGE_RX_FLAGS
593 void (*ndo_change_rx_flags)(struct net_device *dev,
594 int flags);
595 #define HAVE_SET_RX_MODE
596 void (*ndo_set_rx_mode)(struct net_device *dev);
597 #define HAVE_MULTICAST
598 void (*ndo_set_multicast_list)(struct net_device *dev);
599 #define HAVE_SET_MAC_ADDR
600 int (*ndo_set_mac_address)(struct net_device *dev,
601 void *addr);
602 #define HAVE_VALIDATE_ADDR
603 int (*ndo_validate_addr)(struct net_device *dev);
604 #define HAVE_PRIVATE_IOCTL
605 int (*ndo_do_ioctl)(struct net_device *dev,
606 struct ifreq *ifr, int cmd);
607 #define HAVE_SET_CONFIG
608 int (*ndo_set_config)(struct net_device *dev,
609 struct ifmap *map);
610 #define HAVE_CHANGE_MTU
611 int (*ndo_change_mtu)(struct net_device *dev,
612 int new_mtu);
613 int (*ndo_neigh_setup)(struct net_device *dev,
614 struct neigh_parms *);
615 #define HAVE_TX_TIMEOUT
616 void (*ndo_tx_timeout) (struct net_device *dev);
617
618 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
619
620 void (*ndo_vlan_rx_register)(struct net_device *dev,
621 struct vlan_group *grp);
622 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
623 unsigned short vid);
624 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
625 unsigned short vid);
626 #ifdef CONFIG_NET_POLL_CONTROLLER
627 #define HAVE_NETDEV_POLL
628 void (*ndo_poll_controller)(struct net_device *dev);
629 #endif
630 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
631 int (*ndo_fcoe_enable)(struct net_device *dev);
632 int (*ndo_fcoe_disable)(struct net_device *dev);
633 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
634 u16 xid,
635 struct scatterlist *sgl,
636 unsigned int sgc);
637 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
638 u16 xid);
639 #define NETDEV_FCOE_WWNN 0
640 #define NETDEV_FCOE_WWPN 1
641 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
642 u64 *wwn, int type);
643 #endif
644 };
645
646 /*
647 * The DEVICE structure.
648 * Actually, this whole structure is a big mistake. It mixes I/O
649 * data with strictly "high-level" data, and it has to know about
650 * almost every data structure used in the INET module.
651 *
652 * FIXME: cleanup struct net_device such that network protocol info
653 * moves out.
654 */
655
656 struct net_device
657 {
658
659 /*
660 * This is the first field of the "visible" part of this structure
661 * (i.e. as seen by users in the "Space.c" file). It is the name
662 * the interface.
663 */
664 char name[IFNAMSIZ];
665 /* device name hash chain */
666 struct hlist_node name_hlist;
667 /* snmp alias */
668 char *ifalias;
669
670 /*
671 * I/O specific fields
672 * FIXME: Merge these and struct ifmap into one
673 */
674 unsigned long mem_end; /* shared mem end */
675 unsigned long mem_start; /* shared mem start */
676 unsigned long base_addr; /* device I/O address */
677 unsigned int irq; /* device IRQ number */
678
679 /*
680 * Some hardware also needs these fields, but they are not
681 * part of the usual set specified in Space.c.
682 */
683
684 unsigned char if_port; /* Selectable AUI, TP,..*/
685 unsigned char dma; /* DMA channel */
686
687 unsigned long state;
688
689 struct list_head dev_list;
690 struct list_head napi_list;
691 struct list_head unreg_list;
692
693 /* Net device features */
694 unsigned long features;
695 #define NETIF_F_SG 1 /* Scatter/gather IO. */
696 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
697 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
698 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
699 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
700 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
701 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
702 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
703 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
704 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
705 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
706 #define NETIF_F_GSO 2048 /* Enable software GSO. */
707 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
708 /* do not use LLTX in new drivers */
709 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
710 #define NETIF_F_GRO 16384 /* Generic receive offload */
711 #define NETIF_F_LRO 32768 /* large receive offload */
712
713 /* the GSO_MASK reserves bits 16 through 23 */
714 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
715 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
716 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
717
718 /* Segmentation offload features */
719 #define NETIF_F_GSO_SHIFT 16
720 #define NETIF_F_GSO_MASK 0x00ff0000
721 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
722 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
723 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
724 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
725 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
726 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
727
728 /* List of features with software fallbacks. */
729 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
730
731
732 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
733 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
734 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
735 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
736
737 /*
738 * If one device supports one of these features, then enable them
739 * for all in netdev_increment_features.
740 */
741 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
742 NETIF_F_SG | NETIF_F_HIGHDMA | \
743 NETIF_F_FRAGLIST)
744
745 /* Interface index. Unique device identifier */
746 int ifindex;
747 int iflink;
748
749 struct net_device_stats stats;
750
751 #ifdef CONFIG_WIRELESS_EXT
752 /* List of functions to handle Wireless Extensions (instead of ioctl).
753 * See <net/iw_handler.h> for details. Jean II */
754 const struct iw_handler_def * wireless_handlers;
755 /* Instance data managed by the core of Wireless Extensions. */
756 struct iw_public_data * wireless_data;
757 #endif
758 /* Management operations */
759 const struct net_device_ops *netdev_ops;
760 const struct ethtool_ops *ethtool_ops;
761
762 /* Hardware header description */
763 const struct header_ops *header_ops;
764
765 unsigned int flags; /* interface flags (a la BSD) */
766 unsigned short gflags;
767 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
768 unsigned short padded; /* How much padding added by alloc_netdev() */
769
770 unsigned char operstate; /* RFC2863 operstate */
771 unsigned char link_mode; /* mapping policy to operstate */
772
773 unsigned mtu; /* interface MTU value */
774 unsigned short type; /* interface hardware type */
775 unsigned short hard_header_len; /* hardware hdr length */
776
777 /* extra head- and tailroom the hardware may need, but not in all cases
778 * can this be guaranteed, especially tailroom. Some cases also use
779 * LL_MAX_HEADER instead to allocate the skb.
780 */
781 unsigned short needed_headroom;
782 unsigned short needed_tailroom;
783
784 struct net_device *master; /* Pointer to master device of a group,
785 * which this device is member of.
786 */
787
788 /* Interface address info. */
789 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
790 unsigned char addr_len; /* hardware address length */
791 unsigned short dev_id; /* for shared network cards */
792
793 struct netdev_hw_addr_list uc; /* Secondary unicast
794 mac addresses */
795 int uc_promisc;
796 spinlock_t addr_list_lock;
797 struct dev_addr_list *mc_list; /* Multicast mac addresses */
798 int mc_count; /* Number of installed mcasts */
799 unsigned int promiscuity;
800 unsigned int allmulti;
801
802
803 /* Protocol specific pointers */
804
805 #ifdef CONFIG_NET_DSA
806 void *dsa_ptr; /* dsa specific data */
807 #endif
808 void *atalk_ptr; /* AppleTalk link */
809 void *ip_ptr; /* IPv4 specific data */
810 void *dn_ptr; /* DECnet specific data */
811 void *ip6_ptr; /* IPv6 specific data */
812 void *ec_ptr; /* Econet specific data */
813 void *ax25_ptr; /* AX.25 specific data */
814 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
815 assign before registering */
816
817 /*
818 * Cache line mostly used on receive path (including eth_type_trans())
819 */
820 unsigned long last_rx; /* Time of last Rx */
821 /* Interface address info used in eth_type_trans() */
822 unsigned char *dev_addr; /* hw address, (before bcast
823 because most packets are
824 unicast) */
825
826 struct netdev_hw_addr_list dev_addrs; /* list of device
827 hw addresses */
828
829 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
830
831 struct netdev_queue rx_queue;
832
833 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
834
835 /* Number of TX queues allocated at alloc_netdev_mq() time */
836 unsigned int num_tx_queues;
837
838 /* Number of TX queues currently active in device */
839 unsigned int real_num_tx_queues;
840
841 /* root qdisc from userspace point of view */
842 struct Qdisc *qdisc;
843
844 unsigned long tx_queue_len; /* Max frames per queue allowed */
845 spinlock_t tx_global_lock;
846 /*
847 * One part is mostly used on xmit path (device)
848 */
849 /* These may be needed for future network-power-down code. */
850
851 /*
852 * trans_start here is expensive for high speed devices on SMP,
853 * please use netdev_queue->trans_start instead.
854 */
855 unsigned long trans_start; /* Time (in jiffies) of last Tx */
856
857 int watchdog_timeo; /* used by dev_watchdog() */
858 struct timer_list watchdog_timer;
859
860 /* Number of references to this device */
861 atomic_t refcnt ____cacheline_aligned_in_smp;
862
863 /* delayed register/unregister */
864 struct list_head todo_list;
865 /* device index hash chain */
866 struct hlist_node index_hlist;
867
868 struct net_device *link_watch_next;
869
870 /* register/unregister state machine */
871 enum { NETREG_UNINITIALIZED=0,
872 NETREG_REGISTERED, /* completed register_netdevice */
873 NETREG_UNREGISTERING, /* called unregister_netdevice */
874 NETREG_UNREGISTERED, /* completed unregister todo */
875 NETREG_RELEASED, /* called free_netdev */
876 NETREG_DUMMY, /* dummy device for NAPI poll */
877 } reg_state;
878
879 /* Called from unregister, can be used to call free_netdev */
880 void (*destructor)(struct net_device *dev);
881
882 #ifdef CONFIG_NETPOLL
883 struct netpoll_info *npinfo;
884 #endif
885
886 #ifdef CONFIG_NET_NS
887 /* Network namespace this network device is inside */
888 struct net *nd_net;
889 #endif
890
891 /* mid-layer private */
892 void *ml_priv;
893
894 /* bridge stuff */
895 struct net_bridge_port *br_port;
896 /* macvlan */
897 struct macvlan_port *macvlan_port;
898 /* GARP */
899 struct garp_port *garp_port;
900
901 /* class/net/name entry */
902 struct device dev;
903 /* space for optional device, statistics, and wireless sysfs groups */
904 const struct attribute_group *sysfs_groups[4];
905
906 /* rtnetlink link ops */
907 const struct rtnl_link_ops *rtnl_link_ops;
908
909 /* VLAN feature mask */
910 unsigned long vlan_features;
911
912 /* for setting kernel sock attribute on TCP connection setup */
913 #define GSO_MAX_SIZE 65536
914 unsigned int gso_max_size;
915
916 #ifdef CONFIG_DCB
917 /* Data Center Bridging netlink ops */
918 const struct dcbnl_rtnl_ops *dcbnl_ops;
919 #endif
920
921 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
922 /* max exchange id for FCoE LRO by ddp */
923 unsigned int fcoe_ddp_xid;
924 #endif
925 };
926 #define to_net_dev(d) container_of(d, struct net_device, dev)
927
928 #define NETDEV_ALIGN 32
929
930 static inline
931 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
932 unsigned int index)
933 {
934 return &dev->_tx[index];
935 }
936
937 static inline void netdev_for_each_tx_queue(struct net_device *dev,
938 void (*f)(struct net_device *,
939 struct netdev_queue *,
940 void *),
941 void *arg)
942 {
943 unsigned int i;
944
945 for (i = 0; i < dev->num_tx_queues; i++)
946 f(dev, &dev->_tx[i], arg);
947 }
948
949 /*
950 * Net namespace inlines
951 */
952 static inline
953 struct net *dev_net(const struct net_device *dev)
954 {
955 #ifdef CONFIG_NET_NS
956 return dev->nd_net;
957 #else
958 return &init_net;
959 #endif
960 }
961
962 static inline
963 void dev_net_set(struct net_device *dev, struct net *net)
964 {
965 #ifdef CONFIG_NET_NS
966 release_net(dev->nd_net);
967 dev->nd_net = hold_net(net);
968 #endif
969 }
970
971 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
972 {
973 #ifdef CONFIG_NET_DSA_TAG_DSA
974 if (dev->dsa_ptr != NULL)
975 return dsa_uses_dsa_tags(dev->dsa_ptr);
976 #endif
977
978 return 0;
979 }
980
981 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
982 {
983 #ifdef CONFIG_NET_DSA_TAG_TRAILER
984 if (dev->dsa_ptr != NULL)
985 return dsa_uses_trailer_tags(dev->dsa_ptr);
986 #endif
987
988 return 0;
989 }
990
991 /**
992 * netdev_priv - access network device private data
993 * @dev: network device
994 *
995 * Get network device private data
996 */
997 static inline void *netdev_priv(const struct net_device *dev)
998 {
999 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1000 }
1001
1002 /* Set the sysfs physical device reference for the network logical device
1003 * if set prior to registration will cause a symlink during initialization.
1004 */
1005 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1006
1007 /* Set the sysfs device type for the network logical device to allow
1008 * fin grained indentification of different network device types. For
1009 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1010 */
1011 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1012
1013 /**
1014 * netif_napi_add - initialize a napi context
1015 * @dev: network device
1016 * @napi: napi context
1017 * @poll: polling function
1018 * @weight: default weight
1019 *
1020 * netif_napi_add() must be used to initialize a napi context prior to calling
1021 * *any* of the other napi related functions.
1022 */
1023 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1024 int (*poll)(struct napi_struct *, int), int weight);
1025
1026 /**
1027 * netif_napi_del - remove a napi context
1028 * @napi: napi context
1029 *
1030 * netif_napi_del() removes a napi context from the network device napi list
1031 */
1032 void netif_napi_del(struct napi_struct *napi);
1033
1034 struct napi_gro_cb {
1035 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1036 void *frag0;
1037
1038 /* Length of frag0. */
1039 unsigned int frag0_len;
1040
1041 /* This indicates where we are processing relative to skb->data. */
1042 int data_offset;
1043
1044 /* This is non-zero if the packet may be of the same flow. */
1045 int same_flow;
1046
1047 /* This is non-zero if the packet cannot be merged with the new skb. */
1048 int flush;
1049
1050 /* Number of segments aggregated. */
1051 int count;
1052
1053 /* Free the skb? */
1054 int free;
1055 };
1056
1057 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1058
1059 struct packet_type {
1060 __be16 type; /* This is really htons(ether_type). */
1061 struct net_device *dev; /* NULL is wildcarded here */
1062 int (*func) (struct sk_buff *,
1063 struct net_device *,
1064 struct packet_type *,
1065 struct net_device *);
1066 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1067 int features);
1068 int (*gso_send_check)(struct sk_buff *skb);
1069 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1070 struct sk_buff *skb);
1071 int (*gro_complete)(struct sk_buff *skb);
1072 void *af_packet_priv;
1073 struct list_head list;
1074 };
1075
1076 #include <linux/interrupt.h>
1077 #include <linux/notifier.h>
1078
1079 extern rwlock_t dev_base_lock; /* Device list lock */
1080
1081
1082 #define for_each_netdev(net, d) \
1083 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1084 #define for_each_netdev_rcu(net, d) \
1085 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1086 #define for_each_netdev_safe(net, d, n) \
1087 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1088 #define for_each_netdev_continue(net, d) \
1089 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1090 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1091
1092 static inline struct net_device *next_net_device(struct net_device *dev)
1093 {
1094 struct list_head *lh;
1095 struct net *net;
1096
1097 net = dev_net(dev);
1098 lh = dev->dev_list.next;
1099 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1100 }
1101
1102 static inline struct net_device *first_net_device(struct net *net)
1103 {
1104 return list_empty(&net->dev_base_head) ? NULL :
1105 net_device_entry(net->dev_base_head.next);
1106 }
1107
1108 extern int netdev_boot_setup_check(struct net_device *dev);
1109 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1110 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1111 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1112 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1113 extern void dev_add_pack(struct packet_type *pt);
1114 extern void dev_remove_pack(struct packet_type *pt);
1115 extern void __dev_remove_pack(struct packet_type *pt);
1116
1117 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1118 unsigned short mask);
1119 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1120 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1121 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1122 extern int dev_alloc_name(struct net_device *dev, const char *name);
1123 extern int dev_open(struct net_device *dev);
1124 extern int dev_close(struct net_device *dev);
1125 extern void dev_disable_lro(struct net_device *dev);
1126 extern int dev_queue_xmit(struct sk_buff *skb);
1127 extern int register_netdevice(struct net_device *dev);
1128 extern void unregister_netdevice_queue(struct net_device *dev,
1129 struct list_head *head);
1130 extern void unregister_netdevice_many(struct list_head *head);
1131 static inline void unregister_netdevice(struct net_device *dev)
1132 {
1133 unregister_netdevice_queue(dev, NULL);
1134 }
1135
1136 extern void free_netdev(struct net_device *dev);
1137 extern void synchronize_net(void);
1138 extern int register_netdevice_notifier(struct notifier_block *nb);
1139 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1140 extern int init_dummy_netdev(struct net_device *dev);
1141 extern void netdev_resync_ops(struct net_device *dev);
1142
1143 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1144 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1145 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1146 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1147 extern int dev_restart(struct net_device *dev);
1148 #ifdef CONFIG_NETPOLL_TRAP
1149 extern int netpoll_trap(void);
1150 #endif
1151 extern int skb_gro_receive(struct sk_buff **head,
1152 struct sk_buff *skb);
1153 extern void skb_gro_reset_offset(struct sk_buff *skb);
1154
1155 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1156 {
1157 return NAPI_GRO_CB(skb)->data_offset;
1158 }
1159
1160 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1161 {
1162 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1163 }
1164
1165 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1166 {
1167 NAPI_GRO_CB(skb)->data_offset += len;
1168 }
1169
1170 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1171 unsigned int offset)
1172 {
1173 return NAPI_GRO_CB(skb)->frag0 + offset;
1174 }
1175
1176 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1177 {
1178 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1179 }
1180
1181 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1182 unsigned int offset)
1183 {
1184 NAPI_GRO_CB(skb)->frag0 = NULL;
1185 NAPI_GRO_CB(skb)->frag0_len = 0;
1186 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1187 }
1188
1189 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1190 {
1191 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1192 }
1193
1194 static inline void *skb_gro_network_header(struct sk_buff *skb)
1195 {
1196 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1197 skb_network_offset(skb);
1198 }
1199
1200 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1201 unsigned short type,
1202 const void *daddr, const void *saddr,
1203 unsigned len)
1204 {
1205 if (!dev->header_ops || !dev->header_ops->create)
1206 return 0;
1207
1208 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1209 }
1210
1211 static inline int dev_parse_header(const struct sk_buff *skb,
1212 unsigned char *haddr)
1213 {
1214 const struct net_device *dev = skb->dev;
1215
1216 if (!dev->header_ops || !dev->header_ops->parse)
1217 return 0;
1218 return dev->header_ops->parse(skb, haddr);
1219 }
1220
1221 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1222 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1223 static inline int unregister_gifconf(unsigned int family)
1224 {
1225 return register_gifconf(family, NULL);
1226 }
1227
1228 /*
1229 * Incoming packets are placed on per-cpu queues so that
1230 * no locking is needed.
1231 */
1232 struct softnet_data
1233 {
1234 struct Qdisc *output_queue;
1235 struct sk_buff_head input_pkt_queue;
1236 struct list_head poll_list;
1237 struct sk_buff *completion_queue;
1238
1239 struct napi_struct backlog;
1240 };
1241
1242 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1243
1244 #define HAVE_NETIF_QUEUE
1245
1246 extern void __netif_schedule(struct Qdisc *q);
1247
1248 static inline void netif_schedule_queue(struct netdev_queue *txq)
1249 {
1250 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1251 __netif_schedule(txq->qdisc);
1252 }
1253
1254 static inline void netif_tx_schedule_all(struct net_device *dev)
1255 {
1256 unsigned int i;
1257
1258 for (i = 0; i < dev->num_tx_queues; i++)
1259 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1260 }
1261
1262 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1263 {
1264 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1265 }
1266
1267 /**
1268 * netif_start_queue - allow transmit
1269 * @dev: network device
1270 *
1271 * Allow upper layers to call the device hard_start_xmit routine.
1272 */
1273 static inline void netif_start_queue(struct net_device *dev)
1274 {
1275 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1276 }
1277
1278 static inline void netif_tx_start_all_queues(struct net_device *dev)
1279 {
1280 unsigned int i;
1281
1282 for (i = 0; i < dev->num_tx_queues; i++) {
1283 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1284 netif_tx_start_queue(txq);
1285 }
1286 }
1287
1288 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1289 {
1290 #ifdef CONFIG_NETPOLL_TRAP
1291 if (netpoll_trap()) {
1292 netif_tx_start_queue(dev_queue);
1293 return;
1294 }
1295 #endif
1296 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1297 __netif_schedule(dev_queue->qdisc);
1298 }
1299
1300 /**
1301 * netif_wake_queue - restart transmit
1302 * @dev: network device
1303 *
1304 * Allow upper layers to call the device hard_start_xmit routine.
1305 * Used for flow control when transmit resources are available.
1306 */
1307 static inline void netif_wake_queue(struct net_device *dev)
1308 {
1309 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1310 }
1311
1312 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1313 {
1314 unsigned int i;
1315
1316 for (i = 0; i < dev->num_tx_queues; i++) {
1317 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1318 netif_tx_wake_queue(txq);
1319 }
1320 }
1321
1322 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1323 {
1324 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1325 }
1326
1327 /**
1328 * netif_stop_queue - stop transmitted packets
1329 * @dev: network device
1330 *
1331 * Stop upper layers calling the device hard_start_xmit routine.
1332 * Used for flow control when transmit resources are unavailable.
1333 */
1334 static inline void netif_stop_queue(struct net_device *dev)
1335 {
1336 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1337 }
1338
1339 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1340 {
1341 unsigned int i;
1342
1343 for (i = 0; i < dev->num_tx_queues; i++) {
1344 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1345 netif_tx_stop_queue(txq);
1346 }
1347 }
1348
1349 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1350 {
1351 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1352 }
1353
1354 /**
1355 * netif_queue_stopped - test if transmit queue is flowblocked
1356 * @dev: network device
1357 *
1358 * Test if transmit queue on device is currently unable to send.
1359 */
1360 static inline int netif_queue_stopped(const struct net_device *dev)
1361 {
1362 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1363 }
1364
1365 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1366 {
1367 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1368 }
1369
1370 /**
1371 * netif_running - test if up
1372 * @dev: network device
1373 *
1374 * Test if the device has been brought up.
1375 */
1376 static inline int netif_running(const struct net_device *dev)
1377 {
1378 return test_bit(__LINK_STATE_START, &dev->state);
1379 }
1380
1381 /*
1382 * Routines to manage the subqueues on a device. We only need start
1383 * stop, and a check if it's stopped. All other device management is
1384 * done at the overall netdevice level.
1385 * Also test the device if we're multiqueue.
1386 */
1387
1388 /**
1389 * netif_start_subqueue - allow sending packets on subqueue
1390 * @dev: network device
1391 * @queue_index: sub queue index
1392 *
1393 * Start individual transmit queue of a device with multiple transmit queues.
1394 */
1395 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1396 {
1397 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1398
1399 netif_tx_start_queue(txq);
1400 }
1401
1402 /**
1403 * netif_stop_subqueue - stop sending packets on subqueue
1404 * @dev: network device
1405 * @queue_index: sub queue index
1406 *
1407 * Stop individual transmit queue of a device with multiple transmit queues.
1408 */
1409 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1410 {
1411 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1412 #ifdef CONFIG_NETPOLL_TRAP
1413 if (netpoll_trap())
1414 return;
1415 #endif
1416 netif_tx_stop_queue(txq);
1417 }
1418
1419 /**
1420 * netif_subqueue_stopped - test status of subqueue
1421 * @dev: network device
1422 * @queue_index: sub queue index
1423 *
1424 * Check individual transmit queue of a device with multiple transmit queues.
1425 */
1426 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1427 u16 queue_index)
1428 {
1429 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1430
1431 return netif_tx_queue_stopped(txq);
1432 }
1433
1434 static inline int netif_subqueue_stopped(const struct net_device *dev,
1435 struct sk_buff *skb)
1436 {
1437 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1438 }
1439
1440 /**
1441 * netif_wake_subqueue - allow sending packets on subqueue
1442 * @dev: network device
1443 * @queue_index: sub queue index
1444 *
1445 * Resume individual transmit queue of a device with multiple transmit queues.
1446 */
1447 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1448 {
1449 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1450 #ifdef CONFIG_NETPOLL_TRAP
1451 if (netpoll_trap())
1452 return;
1453 #endif
1454 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1455 __netif_schedule(txq->qdisc);
1456 }
1457
1458 /**
1459 * netif_is_multiqueue - test if device has multiple transmit queues
1460 * @dev: network device
1461 *
1462 * Check if device has multiple transmit queues
1463 */
1464 static inline int netif_is_multiqueue(const struct net_device *dev)
1465 {
1466 return (dev->num_tx_queues > 1);
1467 }
1468
1469 /* Use this variant when it is known for sure that it
1470 * is executing from hardware interrupt context or with hardware interrupts
1471 * disabled.
1472 */
1473 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1474
1475 /* Use this variant in places where it could be invoked
1476 * from either hardware interrupt or other context, with hardware interrupts
1477 * either disabled or enabled.
1478 */
1479 extern void dev_kfree_skb_any(struct sk_buff *skb);
1480
1481 #define HAVE_NETIF_RX 1
1482 extern int netif_rx(struct sk_buff *skb);
1483 extern int netif_rx_ni(struct sk_buff *skb);
1484 #define HAVE_NETIF_RECEIVE_SKB 1
1485 extern int netif_receive_skb(struct sk_buff *skb);
1486 extern void napi_gro_flush(struct napi_struct *napi);
1487 extern gro_result_t dev_gro_receive(struct napi_struct *napi,
1488 struct sk_buff *skb);
1489 extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1490 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
1491 struct sk_buff *skb);
1492 extern void napi_reuse_skb(struct napi_struct *napi,
1493 struct sk_buff *skb);
1494 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1495 extern gro_result_t napi_frags_finish(struct napi_struct *napi,
1496 struct sk_buff *skb,
1497 gro_result_t ret);
1498 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1499 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
1500
1501 static inline void napi_free_frags(struct napi_struct *napi)
1502 {
1503 kfree_skb(napi->skb);
1504 napi->skb = NULL;
1505 }
1506
1507 extern void netif_nit_deliver(struct sk_buff *skb);
1508 extern int dev_valid_name(const char *name);
1509 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1510 extern int dev_ethtool(struct net *net, struct ifreq *);
1511 extern unsigned dev_get_flags(const struct net_device *);
1512 extern int dev_change_flags(struct net_device *, unsigned);
1513 extern int dev_change_name(struct net_device *, const char *);
1514 extern int dev_set_alias(struct net_device *, const char *, size_t);
1515 extern int dev_change_net_namespace(struct net_device *,
1516 struct net *, const char *);
1517 extern int dev_set_mtu(struct net_device *, int);
1518 extern int dev_set_mac_address(struct net_device *,
1519 struct sockaddr *);
1520 extern int dev_hard_start_xmit(struct sk_buff *skb,
1521 struct net_device *dev,
1522 struct netdev_queue *txq);
1523
1524 extern int netdev_budget;
1525
1526 /* Called by rtnetlink.c:rtnl_unlock() */
1527 extern void netdev_run_todo(void);
1528
1529 /**
1530 * dev_put - release reference to device
1531 * @dev: network device
1532 *
1533 * Release reference to device to allow it to be freed.
1534 */
1535 static inline void dev_put(struct net_device *dev)
1536 {
1537 atomic_dec(&dev->refcnt);
1538 }
1539
1540 /**
1541 * dev_hold - get reference to device
1542 * @dev: network device
1543 *
1544 * Hold reference to device to keep it from being freed.
1545 */
1546 static inline void dev_hold(struct net_device *dev)
1547 {
1548 atomic_inc(&dev->refcnt);
1549 }
1550
1551 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1552 * and _off may be called from IRQ context, but it is caller
1553 * who is responsible for serialization of these calls.
1554 *
1555 * The name carrier is inappropriate, these functions should really be
1556 * called netif_lowerlayer_*() because they represent the state of any
1557 * kind of lower layer not just hardware media.
1558 */
1559
1560 extern void linkwatch_fire_event(struct net_device *dev);
1561
1562 /**
1563 * netif_carrier_ok - test if carrier present
1564 * @dev: network device
1565 *
1566 * Check if carrier is present on device
1567 */
1568 static inline int netif_carrier_ok(const struct net_device *dev)
1569 {
1570 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1571 }
1572
1573 extern unsigned long dev_trans_start(struct net_device *dev);
1574
1575 extern void __netdev_watchdog_up(struct net_device *dev);
1576
1577 extern void netif_carrier_on(struct net_device *dev);
1578
1579 extern void netif_carrier_off(struct net_device *dev);
1580
1581 /**
1582 * netif_dormant_on - mark device as dormant.
1583 * @dev: network device
1584 *
1585 * Mark device as dormant (as per RFC2863).
1586 *
1587 * The dormant state indicates that the relevant interface is not
1588 * actually in a condition to pass packets (i.e., it is not 'up') but is
1589 * in a "pending" state, waiting for some external event. For "on-
1590 * demand" interfaces, this new state identifies the situation where the
1591 * interface is waiting for events to place it in the up state.
1592 *
1593 */
1594 static inline void netif_dormant_on(struct net_device *dev)
1595 {
1596 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1597 linkwatch_fire_event(dev);
1598 }
1599
1600 /**
1601 * netif_dormant_off - set device as not dormant.
1602 * @dev: network device
1603 *
1604 * Device is not in dormant state.
1605 */
1606 static inline void netif_dormant_off(struct net_device *dev)
1607 {
1608 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1609 linkwatch_fire_event(dev);
1610 }
1611
1612 /**
1613 * netif_dormant - test if carrier present
1614 * @dev: network device
1615 *
1616 * Check if carrier is present on device
1617 */
1618 static inline int netif_dormant(const struct net_device *dev)
1619 {
1620 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1621 }
1622
1623
1624 /**
1625 * netif_oper_up - test if device is operational
1626 * @dev: network device
1627 *
1628 * Check if carrier is operational
1629 */
1630 static inline int netif_oper_up(const struct net_device *dev) {
1631 return (dev->operstate == IF_OPER_UP ||
1632 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1633 }
1634
1635 /**
1636 * netif_device_present - is device available or removed
1637 * @dev: network device
1638 *
1639 * Check if device has not been removed from system.
1640 */
1641 static inline int netif_device_present(struct net_device *dev)
1642 {
1643 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1644 }
1645
1646 extern void netif_device_detach(struct net_device *dev);
1647
1648 extern void netif_device_attach(struct net_device *dev);
1649
1650 /*
1651 * Network interface message level settings
1652 */
1653 #define HAVE_NETIF_MSG 1
1654
1655 enum {
1656 NETIF_MSG_DRV = 0x0001,
1657 NETIF_MSG_PROBE = 0x0002,
1658 NETIF_MSG_LINK = 0x0004,
1659 NETIF_MSG_TIMER = 0x0008,
1660 NETIF_MSG_IFDOWN = 0x0010,
1661 NETIF_MSG_IFUP = 0x0020,
1662 NETIF_MSG_RX_ERR = 0x0040,
1663 NETIF_MSG_TX_ERR = 0x0080,
1664 NETIF_MSG_TX_QUEUED = 0x0100,
1665 NETIF_MSG_INTR = 0x0200,
1666 NETIF_MSG_TX_DONE = 0x0400,
1667 NETIF_MSG_RX_STATUS = 0x0800,
1668 NETIF_MSG_PKTDATA = 0x1000,
1669 NETIF_MSG_HW = 0x2000,
1670 NETIF_MSG_WOL = 0x4000,
1671 };
1672
1673 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1674 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1675 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1676 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1677 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1678 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1679 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1680 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1681 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1682 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1683 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1684 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1685 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1686 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1687 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1688
1689 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1690 {
1691 /* use default */
1692 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1693 return default_msg_enable_bits;
1694 if (debug_value == 0) /* no output */
1695 return 0;
1696 /* set low N bits */
1697 return (1 << debug_value) - 1;
1698 }
1699
1700 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1701 {
1702 spin_lock(&txq->_xmit_lock);
1703 txq->xmit_lock_owner = cpu;
1704 }
1705
1706 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1707 {
1708 spin_lock_bh(&txq->_xmit_lock);
1709 txq->xmit_lock_owner = smp_processor_id();
1710 }
1711
1712 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1713 {
1714 int ok = spin_trylock(&txq->_xmit_lock);
1715 if (likely(ok))
1716 txq->xmit_lock_owner = smp_processor_id();
1717 return ok;
1718 }
1719
1720 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1721 {
1722 txq->xmit_lock_owner = -1;
1723 spin_unlock(&txq->_xmit_lock);
1724 }
1725
1726 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1727 {
1728 txq->xmit_lock_owner = -1;
1729 spin_unlock_bh(&txq->_xmit_lock);
1730 }
1731
1732 static inline void txq_trans_update(struct netdev_queue *txq)
1733 {
1734 if (txq->xmit_lock_owner != -1)
1735 txq->trans_start = jiffies;
1736 }
1737
1738 /**
1739 * netif_tx_lock - grab network device transmit lock
1740 * @dev: network device
1741 *
1742 * Get network device transmit lock
1743 */
1744 static inline void netif_tx_lock(struct net_device *dev)
1745 {
1746 unsigned int i;
1747 int cpu;
1748
1749 spin_lock(&dev->tx_global_lock);
1750 cpu = smp_processor_id();
1751 for (i = 0; i < dev->num_tx_queues; i++) {
1752 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1753
1754 /* We are the only thread of execution doing a
1755 * freeze, but we have to grab the _xmit_lock in
1756 * order to synchronize with threads which are in
1757 * the ->hard_start_xmit() handler and already
1758 * checked the frozen bit.
1759 */
1760 __netif_tx_lock(txq, cpu);
1761 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1762 __netif_tx_unlock(txq);
1763 }
1764 }
1765
1766 static inline void netif_tx_lock_bh(struct net_device *dev)
1767 {
1768 local_bh_disable();
1769 netif_tx_lock(dev);
1770 }
1771
1772 static inline void netif_tx_unlock(struct net_device *dev)
1773 {
1774 unsigned int i;
1775
1776 for (i = 0; i < dev->num_tx_queues; i++) {
1777 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1778
1779 /* No need to grab the _xmit_lock here. If the
1780 * queue is not stopped for another reason, we
1781 * force a schedule.
1782 */
1783 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1784 netif_schedule_queue(txq);
1785 }
1786 spin_unlock(&dev->tx_global_lock);
1787 }
1788
1789 static inline void netif_tx_unlock_bh(struct net_device *dev)
1790 {
1791 netif_tx_unlock(dev);
1792 local_bh_enable();
1793 }
1794
1795 #define HARD_TX_LOCK(dev, txq, cpu) { \
1796 if ((dev->features & NETIF_F_LLTX) == 0) { \
1797 __netif_tx_lock(txq, cpu); \
1798 } \
1799 }
1800
1801 #define HARD_TX_UNLOCK(dev, txq) { \
1802 if ((dev->features & NETIF_F_LLTX) == 0) { \
1803 __netif_tx_unlock(txq); \
1804 } \
1805 }
1806
1807 static inline void netif_tx_disable(struct net_device *dev)
1808 {
1809 unsigned int i;
1810 int cpu;
1811
1812 local_bh_disable();
1813 cpu = smp_processor_id();
1814 for (i = 0; i < dev->num_tx_queues; i++) {
1815 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1816
1817 __netif_tx_lock(txq, cpu);
1818 netif_tx_stop_queue(txq);
1819 __netif_tx_unlock(txq);
1820 }
1821 local_bh_enable();
1822 }
1823
1824 static inline void netif_addr_lock(struct net_device *dev)
1825 {
1826 spin_lock(&dev->addr_list_lock);
1827 }
1828
1829 static inline void netif_addr_lock_bh(struct net_device *dev)
1830 {
1831 spin_lock_bh(&dev->addr_list_lock);
1832 }
1833
1834 static inline void netif_addr_unlock(struct net_device *dev)
1835 {
1836 spin_unlock(&dev->addr_list_lock);
1837 }
1838
1839 static inline void netif_addr_unlock_bh(struct net_device *dev)
1840 {
1841 spin_unlock_bh(&dev->addr_list_lock);
1842 }
1843
1844 /*
1845 * dev_addrs walker. Should be used only for read access. Call with
1846 * rcu_read_lock held.
1847 */
1848 #define for_each_dev_addr(dev, ha) \
1849 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
1850
1851 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1852
1853 extern void ether_setup(struct net_device *dev);
1854
1855 /* Support for loadable net-drivers */
1856 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1857 void (*setup)(struct net_device *),
1858 unsigned int queue_count);
1859 #define alloc_netdev(sizeof_priv, name, setup) \
1860 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1861 extern int register_netdev(struct net_device *dev);
1862 extern void unregister_netdev(struct net_device *dev);
1863
1864 /* Functions used for device addresses handling */
1865 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
1866 unsigned char addr_type);
1867 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
1868 unsigned char addr_type);
1869 extern int dev_addr_add_multiple(struct net_device *to_dev,
1870 struct net_device *from_dev,
1871 unsigned char addr_type);
1872 extern int dev_addr_del_multiple(struct net_device *to_dev,
1873 struct net_device *from_dev,
1874 unsigned char addr_type);
1875
1876 /* Functions used for secondary unicast and multicast support */
1877 extern void dev_set_rx_mode(struct net_device *dev);
1878 extern void __dev_set_rx_mode(struct net_device *dev);
1879 extern int dev_unicast_delete(struct net_device *dev, void *addr);
1880 extern int dev_unicast_add(struct net_device *dev, void *addr);
1881 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1882 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1883 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1884 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1885 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1886 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1887 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1888 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1889 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1890 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1891 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1892 extern int dev_set_allmulti(struct net_device *dev, int inc);
1893 extern void netdev_state_change(struct net_device *dev);
1894 extern void netdev_bonding_change(struct net_device *dev,
1895 unsigned long event);
1896 extern void netdev_features_change(struct net_device *dev);
1897 /* Load a device via the kmod */
1898 extern void dev_load(struct net *net, const char *name);
1899 extern void dev_mcast_init(void);
1900 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1901
1902 extern int netdev_max_backlog;
1903 extern int weight_p;
1904 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1905 extern int skb_checksum_help(struct sk_buff *skb);
1906 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1907 #ifdef CONFIG_BUG
1908 extern void netdev_rx_csum_fault(struct net_device *dev);
1909 #else
1910 static inline void netdev_rx_csum_fault(struct net_device *dev)
1911 {
1912 }
1913 #endif
1914 /* rx skb timestamps */
1915 extern void net_enable_timestamp(void);
1916 extern void net_disable_timestamp(void);
1917
1918 #ifdef CONFIG_PROC_FS
1919 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1920 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1921 extern void dev_seq_stop(struct seq_file *seq, void *v);
1922 #endif
1923
1924 extern int netdev_class_create_file(struct class_attribute *class_attr);
1925 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1926
1927 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1928
1929 extern void linkwatch_run_queue(void);
1930
1931 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1932 unsigned long mask);
1933 unsigned long netdev_fix_features(unsigned long features, const char *name);
1934
1935 static inline int net_gso_ok(int features, int gso_type)
1936 {
1937 int feature = gso_type << NETIF_F_GSO_SHIFT;
1938 return (features & feature) == feature;
1939 }
1940
1941 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1942 {
1943 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
1944 (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST));
1945 }
1946
1947 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1948 {
1949 return skb_is_gso(skb) &&
1950 (!skb_gso_ok(skb, dev->features) ||
1951 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1952 }
1953
1954 static inline void netif_set_gso_max_size(struct net_device *dev,
1955 unsigned int size)
1956 {
1957 dev->gso_max_size = size;
1958 }
1959
1960 static inline void skb_bond_set_mac_by_master(struct sk_buff *skb,
1961 struct net_device *master)
1962 {
1963 if (skb->pkt_type == PACKET_HOST) {
1964 u16 *dest = (u16 *) eth_hdr(skb)->h_dest;
1965
1966 memcpy(dest, master->dev_addr, ETH_ALEN);
1967 }
1968 }
1969
1970 /* On bonding slaves other than the currently active slave, suppress
1971 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1972 * ARP on active-backup slaves with arp_validate enabled.
1973 */
1974 static inline int skb_bond_should_drop(struct sk_buff *skb)
1975 {
1976 struct net_device *dev = skb->dev;
1977 struct net_device *master = dev->master;
1978
1979 if (master) {
1980 if (master->priv_flags & IFF_MASTER_ARPMON)
1981 dev->last_rx = jiffies;
1982
1983 if ((master->priv_flags & IFF_MASTER_ALB) && master->br_port) {
1984 /* Do address unmangle. The local destination address
1985 * will be always the one master has. Provides the right
1986 * functionality in a bridge.
1987 */
1988 skb_bond_set_mac_by_master(skb, master);
1989 }
1990
1991 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
1992 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1993 skb->protocol == __cpu_to_be16(ETH_P_ARP))
1994 return 0;
1995
1996 if (master->priv_flags & IFF_MASTER_ALB) {
1997 if (skb->pkt_type != PACKET_BROADCAST &&
1998 skb->pkt_type != PACKET_MULTICAST)
1999 return 0;
2000 }
2001 if (master->priv_flags & IFF_MASTER_8023AD &&
2002 skb->protocol == __cpu_to_be16(ETH_P_SLOW))
2003 return 0;
2004
2005 return 1;
2006 }
2007 }
2008 return 0;
2009 }
2010
2011 extern struct pernet_operations __net_initdata loopback_net_ops;
2012
2013 static inline int dev_ethtool_get_settings(struct net_device *dev,
2014 struct ethtool_cmd *cmd)
2015 {
2016 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2017 return -EOPNOTSUPP;
2018 return dev->ethtool_ops->get_settings(dev, cmd);
2019 }
2020
2021 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2022 {
2023 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2024 return 0;
2025 return dev->ethtool_ops->get_rx_csum(dev);
2026 }
2027
2028 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2029 {
2030 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2031 return 0;
2032 return dev->ethtool_ops->get_flags(dev);
2033 }
2034 #endif /* __KERNEL__ */
2035
2036 #endif /* _LINUX_NETDEVICE_H */
kernel-based virtual machine