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