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netdev: remove certain HAVE_ macros
[firewire-audio.git] / include / linux / netdevice.h
blobb5fb51d0b8b1bc15c6abec609dfdc3803844eadb
1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Definitions for the Interfaces handler.
7 *
8 * Version: @(#)dev.h 1.0.10 08/12/93
9 *
10 * Authors: Ross Biro
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
17 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
22 *
23 * Moved to /usr/include/linux for NET3
24 */
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
27
28 #include <linux/if.h>
29 #include <linux/if_ether.h>
30 #include <linux/if_packet.h>
31
32 #ifdef __KERNEL__
33 #include <linux/timer.h>
34 #include <linux/delay.h>
35 #include <linux/mm.h>
36 #include <asm/atomic.h>
37 #include <asm/cache.h>
38 #include <asm/byteorder.h>
39
40 #include <linux/device.h>
41 #include <linux/percpu.h>
42 #include <linux/rculist.h>
43 #include <linux/dmaengine.h>
44 #include <linux/workqueue.h>
45
46 #include <linux/ethtool.h>
47 #include <net/net_namespace.h>
48 #include <net/dsa.h>
49 #ifdef CONFIG_DCB
50 #include <net/dcbnl.h>
51 #endif
52
53 struct vlan_group;
54 struct netpoll_info;
55 /* 802.11 specific */
56 struct wireless_dev;
57 /* source back-compat hooks */
58 #define SET_ETHTOOL_OPS(netdev,ops) \
59 ( (netdev)->ethtool_ops = (ops) )
60
61 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
62 functions are available. */
63 #define HAVE_FREE_NETDEV /* free_netdev() */
64 #define HAVE_NETDEV_PRIV /* netdev_priv() */
65
66 /* Backlog congestion levels */
67 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
68 #define NET_RX_DROP 1 /* packet dropped */
69
70 /*
71 * Transmit return codes: transmit return codes originate from three different
72 * namespaces:
73 *
74 * - qdisc return codes
75 * - driver transmit return codes
76 * - errno values
77 *
78 * Drivers are allowed to return any one of those in their hard_start_xmit()
79 * function. Real network devices commonly used with qdiscs should only return
80 * the driver transmit return codes though - when qdiscs are used, the actual
81 * transmission happens asynchronously, so the value is not propagated to
82 * higher layers. Virtual network devices transmit synchronously, in this case
83 * the driver transmit return codes are consumed by dev_queue_xmit(), all
84 * others are propagated to higher layers.
85 */
86
87 /* qdisc ->enqueue() return codes. */
88 #define NET_XMIT_SUCCESS 0x00
89 #define NET_XMIT_DROP 0x01 /* skb dropped */
90 #define NET_XMIT_CN 0x02 /* congestion notification */
91 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
92 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
93
94 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
95 * indicates that the device will soon be dropping packets, or already drops
96 * some packets of the same priority; prompting us to send less aggressively. */
97 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
98 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
99
100 /* Driver transmit return codes */
101 #define NETDEV_TX_MASK 0xf0
102
103 enum netdev_tx {
104 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
105 NETDEV_TX_OK = 0x00, /* driver took care of packet */
106 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
107 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
108 };
109 typedef enum netdev_tx netdev_tx_t;
110
111 /*
112 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
113 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
114 */
115 static inline bool dev_xmit_complete(int rc)
116 {
117 /*
118 * Positive cases with an skb consumed by a driver:
119 * - successful transmission (rc == NETDEV_TX_OK)
120 * - error while transmitting (rc < 0)
121 * - error while queueing to a different device (rc & NET_XMIT_MASK)
122 */
123 if (likely(rc < NET_XMIT_MASK))
124 return true;
125
126 return false;
127 }
128
129 #endif
130
131 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
132
133 #ifdef __KERNEL__
134 /*
135 * Compute the worst case header length according to the protocols
136 * used.
137 */
138
139 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
140 # if defined(CONFIG_MAC80211_MESH)
141 # define LL_MAX_HEADER 128
142 # else
143 # define LL_MAX_HEADER 96
144 # endif
145 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
146 # define LL_MAX_HEADER 48
147 #else
148 # define LL_MAX_HEADER 32
149 #endif
150
151 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
152 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
153 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
154 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
155 #define MAX_HEADER LL_MAX_HEADER
156 #else
157 #define MAX_HEADER (LL_MAX_HEADER + 48)
158 #endif
159
160 #endif /* __KERNEL__ */
161
162 /*
163 * Network device statistics. Akin to the 2.0 ether stats but
164 * with byte counters.
165 */
166
167 struct net_device_stats {
168 unsigned long rx_packets; /* total packets received */
169 unsigned long tx_packets; /* total packets transmitted */
170 unsigned long rx_bytes; /* total bytes received */
171 unsigned long tx_bytes; /* total bytes transmitted */
172 unsigned long rx_errors; /* bad packets received */
173 unsigned long tx_errors; /* packet transmit problems */
174 unsigned long rx_dropped; /* no space in linux buffers */
175 unsigned long tx_dropped; /* no space available in linux */
176 unsigned long multicast; /* multicast packets received */
177 unsigned long collisions;
178
179 /* detailed rx_errors: */
180 unsigned long rx_length_errors;
181 unsigned long rx_over_errors; /* receiver ring buff overflow */
182 unsigned long rx_crc_errors; /* recved pkt with crc error */
183 unsigned long rx_frame_errors; /* recv'd frame alignment error */
184 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
185 unsigned long rx_missed_errors; /* receiver missed packet */
186
187 /* detailed tx_errors */
188 unsigned long tx_aborted_errors;
189 unsigned long tx_carrier_errors;
190 unsigned long tx_fifo_errors;
191 unsigned long tx_heartbeat_errors;
192 unsigned long tx_window_errors;
193
194 /* for cslip etc */
195 unsigned long rx_compressed;
196 unsigned long tx_compressed;
197 };
198
199
200 /* Media selection options. */
201 enum {
202 IF_PORT_UNKNOWN = 0,
203 IF_PORT_10BASE2,
204 IF_PORT_10BASET,
205 IF_PORT_AUI,
206 IF_PORT_100BASET,
207 IF_PORT_100BASETX,
208 IF_PORT_100BASEFX
209 };
210
211 #ifdef __KERNEL__
212
213 #include <linux/cache.h>
214 #include <linux/skbuff.h>
215
216 struct neighbour;
217 struct neigh_parms;
218 struct sk_buff;
219
220 struct netif_rx_stats {
221 unsigned total;
222 unsigned dropped;
223 unsigned time_squeeze;
224 unsigned cpu_collision;
225 };
226
227 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
228
229 struct dev_addr_list {
230 struct dev_addr_list *next;
231 u8 da_addr[MAX_ADDR_LEN];
232 u8 da_addrlen;
233 u8 da_synced;
234 int da_users;
235 int da_gusers;
236 };
237
238 /*
239 * We tag multicasts with these structures.
240 */
241
242 #define dev_mc_list dev_addr_list
243 #define dmi_addr da_addr
244 #define dmi_addrlen da_addrlen
245 #define dmi_users da_users
246 #define dmi_gusers da_gusers
247
248 struct netdev_hw_addr {
249 struct list_head list;
250 unsigned char addr[MAX_ADDR_LEN];
251 unsigned char type;
252 #define NETDEV_HW_ADDR_T_LAN 1
253 #define NETDEV_HW_ADDR_T_SAN 2
254 #define NETDEV_HW_ADDR_T_SLAVE 3
255 #define NETDEV_HW_ADDR_T_UNICAST 4
256 int refcount;
257 bool synced;
258 struct rcu_head rcu_head;
259 };
260
261 struct netdev_hw_addr_list {
262 struct list_head list;
263 int count;
264 };
265
266 struct hh_cache {
267 struct hh_cache *hh_next; /* Next entry */
268 atomic_t hh_refcnt; /* number of users */
269 /*
270 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
271 * cache line on SMP.
272 * They are mostly read, but hh_refcnt may be changed quite frequently,
273 * incurring cache line ping pongs.
274 */
275 __be16 hh_type ____cacheline_aligned_in_smp;
276 /* protocol identifier, f.e ETH_P_IP
277 * NOTE: For VLANs, this will be the
278 * encapuslated type. --BLG
279 */
280 u16 hh_len; /* length of header */
281 int (*hh_output)(struct sk_buff *skb);
282 seqlock_t hh_lock;
283
284 /* cached hardware header; allow for machine alignment needs. */
285 #define HH_DATA_MOD 16
286 #define HH_DATA_OFF(__len) \
287 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
288 #define HH_DATA_ALIGN(__len) \
289 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
290 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
291 };
292
293 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
294 * Alternative is:
295 * dev->hard_header_len ? (dev->hard_header_len +
296 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
297 *
298 * We could use other alignment values, but we must maintain the
299 * relationship HH alignment <= LL alignment.
300 *
301 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
302 * may need.
303 */
304 #define LL_RESERVED_SPACE(dev) \
305 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
306 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
307 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
308 #define LL_ALLOCATED_SPACE(dev) \
309 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
310
311 struct header_ops {
312 int (*create) (struct sk_buff *skb, struct net_device *dev,
313 unsigned short type, const void *daddr,
314 const void *saddr, unsigned len);
315 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
316 int (*rebuild)(struct sk_buff *skb);
317 #define HAVE_HEADER_CACHE
318 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
319 void (*cache_update)(struct hh_cache *hh,
320 const struct net_device *dev,
321 const unsigned char *haddr);
322 };
323
324 /* These flag bits are private to the generic network queueing
325 * layer, they may not be explicitly referenced by any other
326 * code.
327 */
328
329 enum netdev_state_t {
330 __LINK_STATE_START,
331 __LINK_STATE_PRESENT,
332 __LINK_STATE_NOCARRIER,
333 __LINK_STATE_LINKWATCH_PENDING,
334 __LINK_STATE_DORMANT,
335 };
336
337
338 /*
339 * This structure holds at boot time configured netdevice settings. They
340 * are then used in the device probing.
341 */
342 struct netdev_boot_setup {
343 char name[IFNAMSIZ];
344 struct ifmap map;
345 };
346 #define NETDEV_BOOT_SETUP_MAX 8
347
348 extern int __init netdev_boot_setup(char *str);
349
350 /*
351 * Structure for NAPI scheduling similar to tasklet but with weighting
352 */
353 struct napi_struct {
354 /* The poll_list must only be managed by the entity which
355 * changes the state of the NAPI_STATE_SCHED bit. This means
356 * whoever atomically sets that bit can add this napi_struct
357 * to the per-cpu poll_list, and whoever clears that bit
358 * can remove from the list right before clearing the bit.
359 */
360 struct list_head poll_list;
361
362 unsigned long state;
363 int weight;
364 int (*poll)(struct napi_struct *, int);
365 #ifdef CONFIG_NETPOLL
366 spinlock_t poll_lock;
367 int poll_owner;
368 #endif
369
370 unsigned int gro_count;
371
372 struct net_device *dev;
373 struct list_head dev_list;
374 struct sk_buff *gro_list;
375 struct sk_buff *skb;
376 };
377
378 enum {
379 NAPI_STATE_SCHED, /* Poll is scheduled */
380 NAPI_STATE_DISABLE, /* Disable pending */
381 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
382 };
383
384 enum gro_result {
385 GRO_MERGED,
386 GRO_MERGED_FREE,
387 GRO_HELD,
388 GRO_NORMAL,
389 GRO_DROP,
390 };
391 typedef enum gro_result gro_result_t;
392
393 extern void __napi_schedule(struct napi_struct *n);
394
395 static inline int napi_disable_pending(struct napi_struct *n)
396 {
397 return test_bit(NAPI_STATE_DISABLE, &n->state);
398 }
399
400 /**
401 * napi_schedule_prep - check if napi can be scheduled
402 * @n: napi context
403 *
404 * Test if NAPI routine is already running, and if not mark
405 * it as running. This is used as a condition variable
406 * insure only one NAPI poll instance runs. We also make
407 * sure there is no pending NAPI disable.
408 */
409 static inline int napi_schedule_prep(struct napi_struct *n)
410 {
411 return !napi_disable_pending(n) &&
412 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
413 }
414
415 /**
416 * napi_schedule - schedule NAPI poll
417 * @n: napi context
418 *
419 * Schedule NAPI poll routine to be called if it is not already
420 * running.
421 */
422 static inline void napi_schedule(struct napi_struct *n)
423 {
424 if (napi_schedule_prep(n))
425 __napi_schedule(n);
426 }
427
428 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
429 static inline int napi_reschedule(struct napi_struct *napi)
430 {
431 if (napi_schedule_prep(napi)) {
432 __napi_schedule(napi);
433 return 1;
434 }
435 return 0;
436 }
437
438 /**
439 * napi_complete - NAPI processing complete
440 * @n: napi context
441 *
442 * Mark NAPI processing as complete.
443 */
444 extern void __napi_complete(struct napi_struct *n);
445 extern void napi_complete(struct napi_struct *n);
446
447 /**
448 * napi_disable - prevent NAPI from scheduling
449 * @n: napi context
450 *
451 * Stop NAPI from being scheduled on this context.
452 * Waits till any outstanding processing completes.
453 */
454 static inline void napi_disable(struct napi_struct *n)
455 {
456 set_bit(NAPI_STATE_DISABLE, &n->state);
457 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
458 msleep(1);
459 clear_bit(NAPI_STATE_DISABLE, &n->state);
460 }
461
462 /**
463 * napi_enable - enable NAPI scheduling
464 * @n: napi context
465 *
466 * Resume NAPI from being scheduled on this context.
467 * Must be paired with napi_disable.
468 */
469 static inline void napi_enable(struct napi_struct *n)
470 {
471 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
472 smp_mb__before_clear_bit();
473 clear_bit(NAPI_STATE_SCHED, &n->state);
474 }
475
476 #ifdef CONFIG_SMP
477 /**
478 * napi_synchronize - wait until NAPI is not running
479 * @n: napi context
480 *
481 * Wait until NAPI is done being scheduled on this context.
482 * Waits till any outstanding processing completes but
483 * does not disable future activations.
484 */
485 static inline void napi_synchronize(const struct napi_struct *n)
486 {
487 while (test_bit(NAPI_STATE_SCHED, &n->state))
488 msleep(1);
489 }
490 #else
491 # define napi_synchronize(n) barrier()
492 #endif
493
494 enum netdev_queue_state_t {
495 __QUEUE_STATE_XOFF,
496 __QUEUE_STATE_FROZEN,
497 };
498
499 struct netdev_queue {
500 /*
501 * read mostly part
502 */
503 struct net_device *dev;
504 struct Qdisc *qdisc;
505 unsigned long state;
506 struct Qdisc *qdisc_sleeping;
507 /*
508 * write mostly part
509 */
510 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
511 int xmit_lock_owner;
512 /*
513 * please use this field instead of dev->trans_start
514 */
515 unsigned long trans_start;
516 unsigned long tx_bytes;
517 unsigned long tx_packets;
518 unsigned long tx_dropped;
519 } ____cacheline_aligned_in_smp;
520
521
522 /*
523 * This structure defines the management hooks for network devices.
524 * The following hooks can be defined; unless noted otherwise, they are
525 * optional and can be filled with a null pointer.
526 *
527 * int (*ndo_init)(struct net_device *dev);
528 * This function is called once when network device is registered.
529 * The network device can use this to any late stage initializaton
530 * or semantic validattion. It can fail with an error code which will
531 * be propogated back to register_netdev
532 *
533 * void (*ndo_uninit)(struct net_device *dev);
534 * This function is called when device is unregistered or when registration
535 * fails. It is not called if init fails.
536 *
537 * int (*ndo_open)(struct net_device *dev);
538 * This function is called when network device transistions to the up
539 * state.
540 *
541 * int (*ndo_stop)(struct net_device *dev);
542 * This function is called when network device transistions to the down
543 * state.
544 *
545 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
546 * struct net_device *dev);
547 * Called when a packet needs to be transmitted.
548 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
549 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
550 * Required can not be NULL.
551 *
552 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
553 * Called to decide which queue to when device supports multiple
554 * transmit queues.
555 *
556 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
557 * This function is called to allow device receiver to make
558 * changes to configuration when multicast or promiscious is enabled.
559 *
560 * void (*ndo_set_rx_mode)(struct net_device *dev);
561 * This function is called device changes address list filtering.
562 *
563 * void (*ndo_set_multicast_list)(struct net_device *dev);
564 * This function is called when the multicast address list changes.
565 *
566 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
567 * This function is called when the Media Access Control address
568 * needs to be changed. If this interface is not defined, the
569 * mac address can not be changed.
570 *
571 * int (*ndo_validate_addr)(struct net_device *dev);
572 * Test if Media Access Control address is valid for the device.
573 *
574 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
575 * Called when a user request an ioctl which can't be handled by
576 * the generic interface code. If not defined ioctl's return
577 * not supported error code.
578 *
579 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
580 * Used to set network devices bus interface parameters. This interface
581 * is retained for legacy reason, new devices should use the bus
582 * interface (PCI) for low level management.
583 *
584 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
585 * Called when a user wants to change the Maximum Transfer Unit
586 * of a device. If not defined, any request to change MTU will
587 * will return an error.
588 *
589 * void (*ndo_tx_timeout)(struct net_device *dev);
590 * Callback uses when the transmitter has not made any progress
591 * for dev->watchdog ticks.
592 *
593 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
594 * Called when a user wants to get the network device usage
595 * statistics. If not defined, the counters in dev->stats will
596 * be used.
597 *
598 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
599 * If device support VLAN receive accleration
600 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
601 * when vlan groups for the device changes. Note: grp is NULL
602 * if no vlan's groups are being used.
603 *
604 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
605 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
606 * this function is called when a VLAN id is registered.
607 *
608 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
609 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
610 * this function is called when a VLAN id is unregistered.
611 *
612 * void (*ndo_poll_controller)(struct net_device *dev);
613 */
614 #define HAVE_NET_DEVICE_OPS
615 struct net_device_ops {
616 int (*ndo_init)(struct net_device *dev);
617 void (*ndo_uninit)(struct net_device *dev);
618 int (*ndo_open)(struct net_device *dev);
619 int (*ndo_stop)(struct net_device *dev);
620 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
621 struct net_device *dev);
622 u16 (*ndo_select_queue)(struct net_device *dev,
623 struct sk_buff *skb);
624 void (*ndo_change_rx_flags)(struct net_device *dev,
625 int flags);
626 void (*ndo_set_rx_mode)(struct net_device *dev);
627 void (*ndo_set_multicast_list)(struct net_device *dev);
628 int (*ndo_set_mac_address)(struct net_device *dev,
629 void *addr);
630 int (*ndo_validate_addr)(struct net_device *dev);
631 int (*ndo_do_ioctl)(struct net_device *dev,
632 struct ifreq *ifr, int cmd);
633 int (*ndo_set_config)(struct net_device *dev,
634 struct ifmap *map);
635 int (*ndo_change_mtu)(struct net_device *dev,
636 int new_mtu);
637 int (*ndo_neigh_setup)(struct net_device *dev,
638 struct neigh_parms *);
639 void (*ndo_tx_timeout) (struct net_device *dev);
640
641 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
642
643 void (*ndo_vlan_rx_register)(struct net_device *dev,
644 struct vlan_group *grp);
645 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
646 unsigned short vid);
647 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
648 unsigned short vid);
649 #ifdef CONFIG_NET_POLL_CONTROLLER
650 void (*ndo_poll_controller)(struct net_device *dev);
651 #endif
652 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
653 int (*ndo_fcoe_enable)(struct net_device *dev);
654 int (*ndo_fcoe_disable)(struct net_device *dev);
655 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
656 u16 xid,
657 struct scatterlist *sgl,
658 unsigned int sgc);
659 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
660 u16 xid);
661 #define NETDEV_FCOE_WWNN 0
662 #define NETDEV_FCOE_WWPN 1
663 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
664 u64 *wwn, int type);
665 #endif
666 };
667
668 /*
669 * The DEVICE structure.
670 * Actually, this whole structure is a big mistake. It mixes I/O
671 * data with strictly "high-level" data, and it has to know about
672 * almost every data structure used in the INET module.
673 *
674 * FIXME: cleanup struct net_device such that network protocol info
675 * moves out.
676 */
677
678 struct net_device {
679
680 /*
681 * This is the first field of the "visible" part of this structure
682 * (i.e. as seen by users in the "Space.c" file). It is the name
683 * the interface.
684 */
685 char name[IFNAMSIZ];
686 /* device name hash chain */
687 struct hlist_node name_hlist;
688 /* snmp alias */
689 char *ifalias;
690
691 /*
692 * I/O specific fields
693 * FIXME: Merge these and struct ifmap into one
694 */
695 unsigned long mem_end; /* shared mem end */
696 unsigned long mem_start; /* shared mem start */
697 unsigned long base_addr; /* device I/O address */
698 unsigned int irq; /* device IRQ number */
699
700 /*
701 * Some hardware also needs these fields, but they are not
702 * part of the usual set specified in Space.c.
703 */
704
705 unsigned char if_port; /* Selectable AUI, TP,..*/
706 unsigned char dma; /* DMA channel */
707
708 unsigned long state;
709
710 struct list_head dev_list;
711 struct list_head napi_list;
712 struct list_head unreg_list;
713
714 /* Net device features */
715 unsigned long features;
716 #define NETIF_F_SG 1 /* Scatter/gather IO. */
717 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
718 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
719 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
720 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
721 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
722 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
723 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
724 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
725 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
726 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
727 #define NETIF_F_GSO 2048 /* Enable software GSO. */
728 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
729 /* do not use LLTX in new drivers */
730 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
731 #define NETIF_F_GRO 16384 /* Generic receive offload */
732 #define NETIF_F_LRO 32768 /* large receive offload */
733
734 /* the GSO_MASK reserves bits 16 through 23 */
735 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
736 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
737 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
738
739 /* Segmentation offload features */
740 #define NETIF_F_GSO_SHIFT 16
741 #define NETIF_F_GSO_MASK 0x00ff0000
742 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
743 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
744 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
745 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
746 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
747 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
748
749 /* List of features with software fallbacks. */
750 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
751
752
753 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
754 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
755 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
756 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
757
758 /*
759 * If one device supports one of these features, then enable them
760 * for all in netdev_increment_features.
761 */
762 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
763 NETIF_F_SG | NETIF_F_HIGHDMA | \
764 NETIF_F_FRAGLIST)
765
766 /* Interface index. Unique device identifier */
767 int ifindex;
768 int iflink;
769
770 struct net_device_stats stats;
771
772 #ifdef CONFIG_WIRELESS_EXT
773 /* List of functions to handle Wireless Extensions (instead of ioctl).
774 * See <net/iw_handler.h> for details. Jean II */
775 const struct iw_handler_def * wireless_handlers;
776 /* Instance data managed by the core of Wireless Extensions. */
777 struct iw_public_data * wireless_data;
778 #endif
779 /* Management operations */
780 const struct net_device_ops *netdev_ops;
781 const struct ethtool_ops *ethtool_ops;
782
783 /* Hardware header description */
784 const struct header_ops *header_ops;
785
786 unsigned int flags; /* interface flags (a la BSD) */
787 unsigned short gflags;
788 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
789 unsigned short padded; /* How much padding added by alloc_netdev() */
790
791 unsigned char operstate; /* RFC2863 operstate */
792 unsigned char link_mode; /* mapping policy to operstate */
793
794 unsigned mtu; /* interface MTU value */
795 unsigned short type; /* interface hardware type */
796 unsigned short hard_header_len; /* hardware hdr length */
797
798 /* extra head- and tailroom the hardware may need, but not in all cases
799 * can this be guaranteed, especially tailroom. Some cases also use
800 * LL_MAX_HEADER instead to allocate the skb.
801 */
802 unsigned short needed_headroom;
803 unsigned short needed_tailroom;
804
805 struct net_device *master; /* Pointer to master device of a group,
806 * which this device is member of.
807 */
808
809 /* Interface address info. */
810 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
811 unsigned char addr_len; /* hardware address length */
812 unsigned short dev_id; /* for shared network cards */
813
814 struct netdev_hw_addr_list uc; /* Secondary unicast
815 mac addresses */
816 int uc_promisc;
817 spinlock_t addr_list_lock;
818 struct dev_addr_list *mc_list; /* Multicast mac addresses */
819 int mc_count; /* Number of installed mcasts */
820 unsigned int promiscuity;
821 unsigned int allmulti;
822
823
824 /* Protocol specific pointers */
825
826 #ifdef CONFIG_NET_DSA
827 void *dsa_ptr; /* dsa specific data */
828 #endif
829 void *atalk_ptr; /* AppleTalk link */
830 void *ip_ptr; /* IPv4 specific data */
831 void *dn_ptr; /* DECnet specific data */
832 void *ip6_ptr; /* IPv6 specific data */
833 void *ec_ptr; /* Econet specific data */
834 void *ax25_ptr; /* AX.25 specific data */
835 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
836 assign before registering */
837
838 /*
839 * Cache line mostly used on receive path (including eth_type_trans())
840 */
841 unsigned long last_rx; /* Time of last Rx */
842 /* Interface address info used in eth_type_trans() */
843 unsigned char *dev_addr; /* hw address, (before bcast
844 because most packets are
845 unicast) */
846
847 struct netdev_hw_addr_list dev_addrs; /* list of device
848 hw addresses */
849
850 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
851
852 struct netdev_queue rx_queue;
853
854 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
855
856 /* Number of TX queues allocated at alloc_netdev_mq() time */
857 unsigned int num_tx_queues;
858
859 /* Number of TX queues currently active in device */
860 unsigned int real_num_tx_queues;
861
862 /* root qdisc from userspace point of view */
863 struct Qdisc *qdisc;
864
865 unsigned long tx_queue_len; /* Max frames per queue allowed */
866 spinlock_t tx_global_lock;
867 /*
868 * One part is mostly used on xmit path (device)
869 */
870 /* These may be needed for future network-power-down code. */
871
872 /*
873 * trans_start here is expensive for high speed devices on SMP,
874 * please use netdev_queue->trans_start instead.
875 */
876 unsigned long trans_start; /* Time (in jiffies) of last Tx */
877
878 int watchdog_timeo; /* used by dev_watchdog() */
879 struct timer_list watchdog_timer;
880
881 /* Number of references to this device */
882 atomic_t refcnt ____cacheline_aligned_in_smp;
883
884 /* delayed register/unregister */
885 struct list_head todo_list;
886 /* device index hash chain */
887 struct hlist_node index_hlist;
888
889 struct list_head link_watch_list;
890
891 /* register/unregister state machine */
892 enum { NETREG_UNINITIALIZED=0,
893 NETREG_REGISTERED, /* completed register_netdevice */
894 NETREG_UNREGISTERING, /* called unregister_netdevice */
895 NETREG_UNREGISTERED, /* completed unregister todo */
896 NETREG_RELEASED, /* called free_netdev */
897 NETREG_DUMMY, /* dummy device for NAPI poll */
898 } reg_state;
899
900 /* Called from unregister, can be used to call free_netdev */
901 void (*destructor)(struct net_device *dev);
902
903 #ifdef CONFIG_NETPOLL
904 struct netpoll_info *npinfo;
905 #endif
906
907 #ifdef CONFIG_NET_NS
908 /* Network namespace this network device is inside */
909 struct net *nd_net;
910 #endif
911
912 /* mid-layer private */
913 void *ml_priv;
914
915 /* bridge stuff */
916 struct net_bridge_port *br_port;
917 /* macvlan */
918 struct macvlan_port *macvlan_port;
919 /* GARP */
920 struct garp_port *garp_port;
921
922 /* class/net/name entry */
923 struct device dev;
924 /* space for optional device, statistics, and wireless sysfs groups */
925 const struct attribute_group *sysfs_groups[4];
926
927 /* rtnetlink link ops */
928 const struct rtnl_link_ops *rtnl_link_ops;
929
930 /* VLAN feature mask */
931 unsigned long vlan_features;
932
933 /* for setting kernel sock attribute on TCP connection setup */
934 #define GSO_MAX_SIZE 65536
935 unsigned int gso_max_size;
936
937 #ifdef CONFIG_DCB
938 /* Data Center Bridging netlink ops */
939 const struct dcbnl_rtnl_ops *dcbnl_ops;
940 #endif
941
942 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
943 /* max exchange id for FCoE LRO by ddp */
944 unsigned int fcoe_ddp_xid;
945 #endif
946 };
947 #define to_net_dev(d) container_of(d, struct net_device, dev)
948
949 #define NETDEV_ALIGN 32
950
951 static inline
952 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
953 unsigned int index)
954 {
955 return &dev->_tx[index];
956 }
957
958 static inline void netdev_for_each_tx_queue(struct net_device *dev,
959 void (*f)(struct net_device *,
960 struct netdev_queue *,
961 void *),
962 void *arg)
963 {
964 unsigned int i;
965
966 for (i = 0; i < dev->num_tx_queues; i++)
967 f(dev, &dev->_tx[i], arg);
968 }
969
970 /*
971 * Net namespace inlines
972 */
973 static inline
974 struct net *dev_net(const struct net_device *dev)
975 {
976 #ifdef CONFIG_NET_NS
977 return dev->nd_net;
978 #else
979 return &init_net;
980 #endif
981 }
982
983 static inline
984 void dev_net_set(struct net_device *dev, struct net *net)
985 {
986 #ifdef CONFIG_NET_NS
987 release_net(dev->nd_net);
988 dev->nd_net = hold_net(net);
989 #endif
990 }
991
992 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
993 {
994 #ifdef CONFIG_NET_DSA_TAG_DSA
995 if (dev->dsa_ptr != NULL)
996 return dsa_uses_dsa_tags(dev->dsa_ptr);
997 #endif
998
999 return 0;
1000 }
1001
1002 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1003 {
1004 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1005 if (dev->dsa_ptr != NULL)
1006 return dsa_uses_trailer_tags(dev->dsa_ptr);
1007 #endif
1008
1009 return 0;
1010 }
1011
1012 /**
1013 * netdev_priv - access network device private data
1014 * @dev: network device
1015 *
1016 * Get network device private data
1017 */
1018 static inline void *netdev_priv(const struct net_device *dev)
1019 {
1020 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1021 }
1022
1023 /* Set the sysfs physical device reference for the network logical device
1024 * if set prior to registration will cause a symlink during initialization.
1025 */
1026 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1027
1028 /* Set the sysfs device type for the network logical device to allow
1029 * fin grained indentification of different network device types. For
1030 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1031 */
1032 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1033
1034 /**
1035 * netif_napi_add - initialize a napi context
1036 * @dev: network device
1037 * @napi: napi context
1038 * @poll: polling function
1039 * @weight: default weight
1040 *
1041 * netif_napi_add() must be used to initialize a napi context prior to calling
1042 * *any* of the other napi related functions.
1043 */
1044 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1045 int (*poll)(struct napi_struct *, int), int weight);
1046
1047 /**
1048 * netif_napi_del - remove a napi context
1049 * @napi: napi context
1050 *
1051 * netif_napi_del() removes a napi context from the network device napi list
1052 */
1053 void netif_napi_del(struct napi_struct *napi);
1054
1055 struct napi_gro_cb {
1056 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1057 void *frag0;
1058
1059 /* Length of frag0. */
1060 unsigned int frag0_len;
1061
1062 /* This indicates where we are processing relative to skb->data. */
1063 int data_offset;
1064
1065 /* This is non-zero if the packet may be of the same flow. */
1066 int same_flow;
1067
1068 /* This is non-zero if the packet cannot be merged with the new skb. */
1069 int flush;
1070
1071 /* Number of segments aggregated. */
1072 int count;
1073
1074 /* Free the skb? */
1075 int free;
1076 };
1077
1078 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1079
1080 struct packet_type {
1081 __be16 type; /* This is really htons(ether_type). */
1082 struct net_device *dev; /* NULL is wildcarded here */
1083 int (*func) (struct sk_buff *,
1084 struct net_device *,
1085 struct packet_type *,
1086 struct net_device *);
1087 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1088 int features);
1089 int (*gso_send_check)(struct sk_buff *skb);
1090 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1091 struct sk_buff *skb);
1092 int (*gro_complete)(struct sk_buff *skb);
1093 void *af_packet_priv;
1094 struct list_head list;
1095 };
1096
1097 #include <linux/interrupt.h>
1098 #include <linux/notifier.h>
1099
1100 extern rwlock_t dev_base_lock; /* Device list lock */
1101
1102
1103 #define for_each_netdev(net, d) \
1104 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1105 #define for_each_netdev_reverse(net, d) \
1106 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1107 #define for_each_netdev_rcu(net, d) \
1108 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1109 #define for_each_netdev_safe(net, d, n) \
1110 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1111 #define for_each_netdev_continue(net, d) \
1112 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1113 #define for_each_netdev_continue_rcu(net, d) \
1114 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1115 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1116
1117 static inline struct net_device *next_net_device(struct net_device *dev)
1118 {
1119 struct list_head *lh;
1120 struct net *net;
1121
1122 net = dev_net(dev);
1123 lh = dev->dev_list.next;
1124 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1125 }
1126
1127 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1128 {
1129 struct list_head *lh;
1130 struct net *net;
1131
1132 net = dev_net(dev);
1133 lh = rcu_dereference(dev->dev_list.next);
1134 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1135 }
1136
1137 static inline struct net_device *first_net_device(struct net *net)
1138 {
1139 return list_empty(&net->dev_base_head) ? NULL :
1140 net_device_entry(net->dev_base_head.next);
1141 }
1142
1143 extern int netdev_boot_setup_check(struct net_device *dev);
1144 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1145 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1146 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1147 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1148 extern void dev_add_pack(struct packet_type *pt);
1149 extern void dev_remove_pack(struct packet_type *pt);
1150 extern void __dev_remove_pack(struct packet_type *pt);
1151
1152 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1153 unsigned short mask);
1154 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1155 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1156 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1157 extern int dev_alloc_name(struct net_device *dev, const char *name);
1158 extern int dev_open(struct net_device *dev);
1159 extern int dev_close(struct net_device *dev);
1160 extern void dev_disable_lro(struct net_device *dev);
1161 extern int dev_queue_xmit(struct sk_buff *skb);
1162 extern int register_netdevice(struct net_device *dev);
1163 extern void unregister_netdevice_queue(struct net_device *dev,
1164 struct list_head *head);
1165 extern void unregister_netdevice_many(struct list_head *head);
1166 static inline void unregister_netdevice(struct net_device *dev)
1167 {
1168 unregister_netdevice_queue(dev, NULL);
1169 }
1170
1171 extern void free_netdev(struct net_device *dev);
1172 extern void synchronize_net(void);
1173 extern int register_netdevice_notifier(struct notifier_block *nb);
1174 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1175 extern int init_dummy_netdev(struct net_device *dev);
1176 extern void netdev_resync_ops(struct net_device *dev);
1177
1178 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1179 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1180 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1181 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1182 extern int dev_restart(struct net_device *dev);
1183 #ifdef CONFIG_NETPOLL_TRAP
1184 extern int netpoll_trap(void);
1185 #endif
1186 extern int skb_gro_receive(struct sk_buff **head,
1187 struct sk_buff *skb);
1188 extern void skb_gro_reset_offset(struct sk_buff *skb);
1189
1190 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1191 {
1192 return NAPI_GRO_CB(skb)->data_offset;
1193 }
1194
1195 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1196 {
1197 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1198 }
1199
1200 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1201 {
1202 NAPI_GRO_CB(skb)->data_offset += len;
1203 }
1204
1205 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1206 unsigned int offset)
1207 {
1208 return NAPI_GRO_CB(skb)->frag0 + offset;
1209 }
1210
1211 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1212 {
1213 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1214 }
1215
1216 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1217 unsigned int offset)
1218 {
1219 NAPI_GRO_CB(skb)->frag0 = NULL;
1220 NAPI_GRO_CB(skb)->frag0_len = 0;
1221 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1222 }
1223
1224 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1225 {
1226 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1227 }
1228
1229 static inline void *skb_gro_network_header(struct sk_buff *skb)
1230 {
1231 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1232 skb_network_offset(skb);
1233 }
1234
1235 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1236 unsigned short type,
1237 const void *daddr, const void *saddr,
1238 unsigned len)
1239 {
1240 if (!dev->header_ops || !dev->header_ops->create)
1241 return 0;
1242
1243 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1244 }
1245
1246 static inline int dev_parse_header(const struct sk_buff *skb,
1247 unsigned char *haddr)
1248 {
1249 const struct net_device *dev = skb->dev;
1250
1251 if (!dev->header_ops || !dev->header_ops->parse)
1252 return 0;
1253 return dev->header_ops->parse(skb, haddr);
1254 }
1255
1256 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1257 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1258 static inline int unregister_gifconf(unsigned int family)
1259 {
1260 return register_gifconf(family, NULL);
1261 }
1262
1263 /*
1264 * Incoming packets are placed on per-cpu queues so that
1265 * no locking is needed.
1266 */
1267 struct softnet_data {
1268 struct Qdisc *output_queue;
1269 struct sk_buff_head input_pkt_queue;
1270 struct list_head poll_list;
1271 struct sk_buff *completion_queue;
1272
1273 struct napi_struct backlog;
1274 };
1275
1276 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1277
1278 #define HAVE_NETIF_QUEUE
1279
1280 extern void __netif_schedule(struct Qdisc *q);
1281
1282 static inline void netif_schedule_queue(struct netdev_queue *txq)
1283 {
1284 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1285 __netif_schedule(txq->qdisc);
1286 }
1287
1288 static inline void netif_tx_schedule_all(struct net_device *dev)
1289 {
1290 unsigned int i;
1291
1292 for (i = 0; i < dev->num_tx_queues; i++)
1293 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1294 }
1295
1296 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1297 {
1298 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1299 }
1300
1301 /**
1302 * netif_start_queue - allow transmit
1303 * @dev: network device
1304 *
1305 * Allow upper layers to call the device hard_start_xmit routine.
1306 */
1307 static inline void netif_start_queue(struct net_device *dev)
1308 {
1309 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1310 }
1311
1312 static inline void netif_tx_start_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_start_queue(txq);
1319 }
1320 }
1321
1322 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1323 {
1324 #ifdef CONFIG_NETPOLL_TRAP
1325 if (netpoll_trap()) {
1326 netif_tx_start_queue(dev_queue);
1327 return;
1328 }
1329 #endif
1330 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1331 __netif_schedule(dev_queue->qdisc);
1332 }
1333
1334 /**
1335 * netif_wake_queue - restart transmit
1336 * @dev: network device
1337 *
1338 * Allow upper layers to call the device hard_start_xmit routine.
1339 * Used for flow control when transmit resources are available.
1340 */
1341 static inline void netif_wake_queue(struct net_device *dev)
1342 {
1343 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1344 }
1345
1346 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1347 {
1348 unsigned int i;
1349
1350 for (i = 0; i < dev->num_tx_queues; i++) {
1351 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1352 netif_tx_wake_queue(txq);
1353 }
1354 }
1355
1356 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1357 {
1358 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1359 }
1360
1361 /**
1362 * netif_stop_queue - stop transmitted packets
1363 * @dev: network device
1364 *
1365 * Stop upper layers calling the device hard_start_xmit routine.
1366 * Used for flow control when transmit resources are unavailable.
1367 */
1368 static inline void netif_stop_queue(struct net_device *dev)
1369 {
1370 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1371 }
1372
1373 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1374 {
1375 unsigned int i;
1376
1377 for (i = 0; i < dev->num_tx_queues; i++) {
1378 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1379 netif_tx_stop_queue(txq);
1380 }
1381 }
1382
1383 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1384 {
1385 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1386 }
1387
1388 /**
1389 * netif_queue_stopped - test if transmit queue is flowblocked
1390 * @dev: network device
1391 *
1392 * Test if transmit queue on device is currently unable to send.
1393 */
1394 static inline int netif_queue_stopped(const struct net_device *dev)
1395 {
1396 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1397 }
1398
1399 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1400 {
1401 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1402 }
1403
1404 /**
1405 * netif_running - test if up
1406 * @dev: network device
1407 *
1408 * Test if the device has been brought up.
1409 */
1410 static inline int netif_running(const struct net_device *dev)
1411 {
1412 return test_bit(__LINK_STATE_START, &dev->state);
1413 }
1414
1415 /*
1416 * Routines to manage the subqueues on a device. We only need start
1417 * stop, and a check if it's stopped. All other device management is
1418 * done at the overall netdevice level.
1419 * Also test the device if we're multiqueue.
1420 */
1421
1422 /**
1423 * netif_start_subqueue - allow sending packets on subqueue
1424 * @dev: network device
1425 * @queue_index: sub queue index
1426 *
1427 * Start individual transmit queue of a device with multiple transmit queues.
1428 */
1429 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1430 {
1431 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1432
1433 netif_tx_start_queue(txq);
1434 }
1435
1436 /**
1437 * netif_stop_subqueue - stop sending packets on subqueue
1438 * @dev: network device
1439 * @queue_index: sub queue index
1440 *
1441 * Stop individual transmit queue of a device with multiple transmit queues.
1442 */
1443 static inline void netif_stop_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 netif_tx_stop_queue(txq);
1451 }
1452
1453 /**
1454 * netif_subqueue_stopped - test status of subqueue
1455 * @dev: network device
1456 * @queue_index: sub queue index
1457 *
1458 * Check individual transmit queue of a device with multiple transmit queues.
1459 */
1460 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1461 u16 queue_index)
1462 {
1463 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1464
1465 return netif_tx_queue_stopped(txq);
1466 }
1467
1468 static inline int netif_subqueue_stopped(const struct net_device *dev,
1469 struct sk_buff *skb)
1470 {
1471 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1472 }
1473
1474 /**
1475 * netif_wake_subqueue - allow sending packets on subqueue
1476 * @dev: network device
1477 * @queue_index: sub queue index
1478 *
1479 * Resume individual transmit queue of a device with multiple transmit queues.
1480 */
1481 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1482 {
1483 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1484 #ifdef CONFIG_NETPOLL_TRAP
1485 if (netpoll_trap())
1486 return;
1487 #endif
1488 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1489 __netif_schedule(txq->qdisc);
1490 }
1491
1492 /**
1493 * netif_is_multiqueue - test if device has multiple transmit queues
1494 * @dev: network device
1495 *
1496 * Check if device has multiple transmit queues
1497 */
1498 static inline int netif_is_multiqueue(const struct net_device *dev)
1499 {
1500 return (dev->num_tx_queues > 1);
1501 }
1502
1503 /* Use this variant when it is known for sure that it
1504 * is executing from hardware interrupt context or with hardware interrupts
1505 * disabled.
1506 */
1507 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1508
1509 /* Use this variant in places where it could be invoked
1510 * from either hardware interrupt or other context, with hardware interrupts
1511 * either disabled or enabled.
1512 */
1513 extern void dev_kfree_skb_any(struct sk_buff *skb);
1514
1515 #define HAVE_NETIF_RX 1
1516 extern int netif_rx(struct sk_buff *skb);
1517 extern int netif_rx_ni(struct sk_buff *skb);
1518 #define HAVE_NETIF_RECEIVE_SKB 1
1519 extern int netif_receive_skb(struct sk_buff *skb);
1520 extern gro_result_t dev_gro_receive(struct napi_struct *napi,
1521 struct sk_buff *skb);
1522 extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1523 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
1524 struct sk_buff *skb);
1525 extern void napi_reuse_skb(struct napi_struct *napi,
1526 struct sk_buff *skb);
1527 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1528 extern gro_result_t napi_frags_finish(struct napi_struct *napi,
1529 struct sk_buff *skb,
1530 gro_result_t ret);
1531 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1532 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
1533
1534 static inline void napi_free_frags(struct napi_struct *napi)
1535 {
1536 kfree_skb(napi->skb);
1537 napi->skb = NULL;
1538 }
1539
1540 extern void netif_nit_deliver(struct sk_buff *skb);
1541 extern int dev_valid_name(const char *name);
1542 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1543 extern int dev_ethtool(struct net *net, struct ifreq *);
1544 extern unsigned dev_get_flags(const struct net_device *);
1545 extern int dev_change_flags(struct net_device *, unsigned);
1546 extern int dev_change_name(struct net_device *, const char *);
1547 extern int dev_set_alias(struct net_device *, const char *, size_t);
1548 extern int dev_change_net_namespace(struct net_device *,
1549 struct net *, const char *);
1550 extern int dev_set_mtu(struct net_device *, int);
1551 extern int dev_set_mac_address(struct net_device *,
1552 struct sockaddr *);
1553 extern int dev_hard_start_xmit(struct sk_buff *skb,
1554 struct net_device *dev,
1555 struct netdev_queue *txq);
1556 extern int dev_forward_skb(struct net_device *dev,
1557 struct sk_buff *skb);
1558
1559 extern int netdev_budget;
1560
1561 /* Called by rtnetlink.c:rtnl_unlock() */
1562 extern void netdev_run_todo(void);
1563
1564 /**
1565 * dev_put - release reference to device
1566 * @dev: network device
1567 *
1568 * Release reference to device to allow it to be freed.
1569 */
1570 static inline void dev_put(struct net_device *dev)
1571 {
1572 atomic_dec(&dev->refcnt);
1573 }
1574
1575 /**
1576 * dev_hold - get reference to device
1577 * @dev: network device
1578 *
1579 * Hold reference to device to keep it from being freed.
1580 */
1581 static inline void dev_hold(struct net_device *dev)
1582 {
1583 atomic_inc(&dev->refcnt);
1584 }
1585
1586 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1587 * and _off may be called from IRQ context, but it is caller
1588 * who is responsible for serialization of these calls.
1589 *
1590 * The name carrier is inappropriate, these functions should really be
1591 * called netif_lowerlayer_*() because they represent the state of any
1592 * kind of lower layer not just hardware media.
1593 */
1594
1595 extern void linkwatch_fire_event(struct net_device *dev);
1596 extern void linkwatch_forget_dev(struct net_device *dev);
1597
1598 /**
1599 * netif_carrier_ok - test if carrier present
1600 * @dev: network device
1601 *
1602 * Check if carrier is present on device
1603 */
1604 static inline int netif_carrier_ok(const struct net_device *dev)
1605 {
1606 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1607 }
1608
1609 extern unsigned long dev_trans_start(struct net_device *dev);
1610
1611 extern void __netdev_watchdog_up(struct net_device *dev);
1612
1613 extern void netif_carrier_on(struct net_device *dev);
1614
1615 extern void netif_carrier_off(struct net_device *dev);
1616
1617 /**
1618 * netif_dormant_on - mark device as dormant.
1619 * @dev: network device
1620 *
1621 * Mark device as dormant (as per RFC2863).
1622 *
1623 * The dormant state indicates that the relevant interface is not
1624 * actually in a condition to pass packets (i.e., it is not 'up') but is
1625 * in a "pending" state, waiting for some external event. For "on-
1626 * demand" interfaces, this new state identifies the situation where the
1627 * interface is waiting for events to place it in the up state.
1628 *
1629 */
1630 static inline void netif_dormant_on(struct net_device *dev)
1631 {
1632 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1633 linkwatch_fire_event(dev);
1634 }
1635
1636 /**
1637 * netif_dormant_off - set device as not dormant.
1638 * @dev: network device
1639 *
1640 * Device is not in dormant state.
1641 */
1642 static inline void netif_dormant_off(struct net_device *dev)
1643 {
1644 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1645 linkwatch_fire_event(dev);
1646 }
1647
1648 /**
1649 * netif_dormant - test if carrier present
1650 * @dev: network device
1651 *
1652 * Check if carrier is present on device
1653 */
1654 static inline int netif_dormant(const struct net_device *dev)
1655 {
1656 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1657 }
1658
1659
1660 /**
1661 * netif_oper_up - test if device is operational
1662 * @dev: network device
1663 *
1664 * Check if carrier is operational
1665 */
1666 static inline int netif_oper_up(const struct net_device *dev)
1667 {
1668 return (dev->operstate == IF_OPER_UP ||
1669 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1670 }
1671
1672 /**
1673 * netif_device_present - is device available or removed
1674 * @dev: network device
1675 *
1676 * Check if device has not been removed from system.
1677 */
1678 static inline int netif_device_present(struct net_device *dev)
1679 {
1680 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1681 }
1682
1683 extern void netif_device_detach(struct net_device *dev);
1684
1685 extern void netif_device_attach(struct net_device *dev);
1686
1687 /*
1688 * Network interface message level settings
1689 */
1690 #define HAVE_NETIF_MSG 1
1691
1692 enum {
1693 NETIF_MSG_DRV = 0x0001,
1694 NETIF_MSG_PROBE = 0x0002,
1695 NETIF_MSG_LINK = 0x0004,
1696 NETIF_MSG_TIMER = 0x0008,
1697 NETIF_MSG_IFDOWN = 0x0010,
1698 NETIF_MSG_IFUP = 0x0020,
1699 NETIF_MSG_RX_ERR = 0x0040,
1700 NETIF_MSG_TX_ERR = 0x0080,
1701 NETIF_MSG_TX_QUEUED = 0x0100,
1702 NETIF_MSG_INTR = 0x0200,
1703 NETIF_MSG_TX_DONE = 0x0400,
1704 NETIF_MSG_RX_STATUS = 0x0800,
1705 NETIF_MSG_PKTDATA = 0x1000,
1706 NETIF_MSG_HW = 0x2000,
1707 NETIF_MSG_WOL = 0x4000,
1708 };
1709
1710 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1711 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1712 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1713 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1714 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1715 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1716 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1717 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1718 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1719 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1720 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1721 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1722 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1723 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1724 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1725
1726 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1727 {
1728 /* use default */
1729 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1730 return default_msg_enable_bits;
1731 if (debug_value == 0) /* no output */
1732 return 0;
1733 /* set low N bits */
1734 return (1 << debug_value) - 1;
1735 }
1736
1737 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1738 {
1739 spin_lock(&txq->_xmit_lock);
1740 txq->xmit_lock_owner = cpu;
1741 }
1742
1743 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1744 {
1745 spin_lock_bh(&txq->_xmit_lock);
1746 txq->xmit_lock_owner = smp_processor_id();
1747 }
1748
1749 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1750 {
1751 int ok = spin_trylock(&txq->_xmit_lock);
1752 if (likely(ok))
1753 txq->xmit_lock_owner = smp_processor_id();
1754 return ok;
1755 }
1756
1757 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1758 {
1759 txq->xmit_lock_owner = -1;
1760 spin_unlock(&txq->_xmit_lock);
1761 }
1762
1763 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1764 {
1765 txq->xmit_lock_owner = -1;
1766 spin_unlock_bh(&txq->_xmit_lock);
1767 }
1768
1769 static inline void txq_trans_update(struct netdev_queue *txq)
1770 {
1771 if (txq->xmit_lock_owner != -1)
1772 txq->trans_start = jiffies;
1773 }
1774
1775 /**
1776 * netif_tx_lock - grab network device transmit lock
1777 * @dev: network device
1778 *
1779 * Get network device transmit lock
1780 */
1781 static inline void netif_tx_lock(struct net_device *dev)
1782 {
1783 unsigned int i;
1784 int cpu;
1785
1786 spin_lock(&dev->tx_global_lock);
1787 cpu = smp_processor_id();
1788 for (i = 0; i < dev->num_tx_queues; i++) {
1789 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1790
1791 /* We are the only thread of execution doing a
1792 * freeze, but we have to grab the _xmit_lock in
1793 * order to synchronize with threads which are in
1794 * the ->hard_start_xmit() handler and already
1795 * checked the frozen bit.
1796 */
1797 __netif_tx_lock(txq, cpu);
1798 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1799 __netif_tx_unlock(txq);
1800 }
1801 }
1802
1803 static inline void netif_tx_lock_bh(struct net_device *dev)
1804 {
1805 local_bh_disable();
1806 netif_tx_lock(dev);
1807 }
1808
1809 static inline void netif_tx_unlock(struct net_device *dev)
1810 {
1811 unsigned int i;
1812
1813 for (i = 0; i < dev->num_tx_queues; i++) {
1814 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1815
1816 /* No need to grab the _xmit_lock here. If the
1817 * queue is not stopped for another reason, we
1818 * force a schedule.
1819 */
1820 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1821 netif_schedule_queue(txq);
1822 }
1823 spin_unlock(&dev->tx_global_lock);
1824 }
1825
1826 static inline void netif_tx_unlock_bh(struct net_device *dev)
1827 {
1828 netif_tx_unlock(dev);
1829 local_bh_enable();
1830 }
1831
1832 #define HARD_TX_LOCK(dev, txq, cpu) { \
1833 if ((dev->features & NETIF_F_LLTX) == 0) { \
1834 __netif_tx_lock(txq, cpu); \
1835 } \
1836 }
1837
1838 #define HARD_TX_UNLOCK(dev, txq) { \
1839 if ((dev->features & NETIF_F_LLTX) == 0) { \
1840 __netif_tx_unlock(txq); \
1841 } \
1842 }
1843
1844 static inline void netif_tx_disable(struct net_device *dev)
1845 {
1846 unsigned int i;
1847 int cpu;
1848
1849 local_bh_disable();
1850 cpu = smp_processor_id();
1851 for (i = 0; i < dev->num_tx_queues; i++) {
1852 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1853
1854 __netif_tx_lock(txq, cpu);
1855 netif_tx_stop_queue(txq);
1856 __netif_tx_unlock(txq);
1857 }
1858 local_bh_enable();
1859 }
1860
1861 static inline void netif_addr_lock(struct net_device *dev)
1862 {
1863 spin_lock(&dev->addr_list_lock);
1864 }
1865
1866 static inline void netif_addr_lock_bh(struct net_device *dev)
1867 {
1868 spin_lock_bh(&dev->addr_list_lock);
1869 }
1870
1871 static inline void netif_addr_unlock(struct net_device *dev)
1872 {
1873 spin_unlock(&dev->addr_list_lock);
1874 }
1875
1876 static inline void netif_addr_unlock_bh(struct net_device *dev)
1877 {
1878 spin_unlock_bh(&dev->addr_list_lock);
1879 }
1880
1881 /*
1882 * dev_addrs walker. Should be used only for read access. Call with
1883 * rcu_read_lock held.
1884 */
1885 #define for_each_dev_addr(dev, ha) \
1886 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
1887
1888 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1889
1890 extern void ether_setup(struct net_device *dev);
1891
1892 /* Support for loadable net-drivers */
1893 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1894 void (*setup)(struct net_device *),
1895 unsigned int queue_count);
1896 #define alloc_netdev(sizeof_priv, name, setup) \
1897 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1898 extern int register_netdev(struct net_device *dev);
1899 extern void unregister_netdev(struct net_device *dev);
1900
1901 /* Functions used for device addresses handling */
1902 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
1903 unsigned char addr_type);
1904 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
1905 unsigned char addr_type);
1906 extern int dev_addr_add_multiple(struct net_device *to_dev,
1907 struct net_device *from_dev,
1908 unsigned char addr_type);
1909 extern int dev_addr_del_multiple(struct net_device *to_dev,
1910 struct net_device *from_dev,
1911 unsigned char addr_type);
1912
1913 /* Functions used for secondary unicast and multicast support */
1914 extern void dev_set_rx_mode(struct net_device *dev);
1915 extern void __dev_set_rx_mode(struct net_device *dev);
1916 extern int dev_unicast_delete(struct net_device *dev, void *addr);
1917 extern int dev_unicast_add(struct net_device *dev, void *addr);
1918 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1919 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1920 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1921 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1922 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1923 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1924 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1925 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1926 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1927 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1928 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1929 extern int dev_set_allmulti(struct net_device *dev, int inc);
1930 extern void netdev_state_change(struct net_device *dev);
1931 extern void netdev_bonding_change(struct net_device *dev,
1932 unsigned long event);
1933 extern void netdev_features_change(struct net_device *dev);
1934 /* Load a device via the kmod */
1935 extern void dev_load(struct net *net, const char *name);
1936 extern void dev_mcast_init(void);
1937 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1938 extern void dev_txq_stats_fold(const struct net_device *dev, struct net_device_stats *stats);
1939
1940 extern int netdev_max_backlog;
1941 extern int weight_p;
1942 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1943 extern int skb_checksum_help(struct sk_buff *skb);
1944 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1945 #ifdef CONFIG_BUG
1946 extern void netdev_rx_csum_fault(struct net_device *dev);
1947 #else
1948 static inline void netdev_rx_csum_fault(struct net_device *dev)
1949 {
1950 }
1951 #endif
1952 /* rx skb timestamps */
1953 extern void net_enable_timestamp(void);
1954 extern void net_disable_timestamp(void);
1955
1956 #ifdef CONFIG_PROC_FS
1957 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1958 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1959 extern void dev_seq_stop(struct seq_file *seq, void *v);
1960 #endif
1961
1962 extern int netdev_class_create_file(struct class_attribute *class_attr);
1963 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1964
1965 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1966
1967 extern void linkwatch_run_queue(void);
1968
1969 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1970 unsigned long mask);
1971 unsigned long netdev_fix_features(unsigned long features, const char *name);
1972
1973 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
1974 struct net_device *dev);
1975
1976 static inline int net_gso_ok(int features, int gso_type)
1977 {
1978 int feature = gso_type << NETIF_F_GSO_SHIFT;
1979 return (features & feature) == feature;
1980 }
1981
1982 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1983 {
1984 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
1985 (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST));
1986 }
1987
1988 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1989 {
1990 return skb_is_gso(skb) &&
1991 (!skb_gso_ok(skb, dev->features) ||
1992 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1993 }
1994
1995 static inline void netif_set_gso_max_size(struct net_device *dev,
1996 unsigned int size)
1997 {
1998 dev->gso_max_size = size;
1999 }
2000
2001 static inline void skb_bond_set_mac_by_master(struct sk_buff *skb,
2002 struct net_device *master)
2003 {
2004 if (skb->pkt_type == PACKET_HOST) {
2005 u16 *dest = (u16 *) eth_hdr(skb)->h_dest;
2006
2007 memcpy(dest, master->dev_addr, ETH_ALEN);
2008 }
2009 }
2010
2011 /* On bonding slaves other than the currently active slave, suppress
2012 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
2013 * ARP on active-backup slaves with arp_validate enabled.
2014 */
2015 static inline int skb_bond_should_drop(struct sk_buff *skb)
2016 {
2017 struct net_device *dev = skb->dev;
2018 struct net_device *master = dev->master;
2019
2020 if (master) {
2021 if (master->priv_flags & IFF_MASTER_ARPMON)
2022 dev->last_rx = jiffies;
2023
2024 if ((master->priv_flags & IFF_MASTER_ALB) && master->br_port) {
2025 /* Do address unmangle. The local destination address
2026 * will be always the one master has. Provides the right
2027 * functionality in a bridge.
2028 */
2029 skb_bond_set_mac_by_master(skb, master);
2030 }
2031
2032 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
2033 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
2034 skb->protocol == __cpu_to_be16(ETH_P_ARP))
2035 return 0;
2036
2037 if (master->priv_flags & IFF_MASTER_ALB) {
2038 if (skb->pkt_type != PACKET_BROADCAST &&
2039 skb->pkt_type != PACKET_MULTICAST)
2040 return 0;
2041 }
2042 if (master->priv_flags & IFF_MASTER_8023AD &&
2043 skb->protocol == __cpu_to_be16(ETH_P_SLOW))
2044 return 0;
2045
2046 return 1;
2047 }
2048 }
2049 return 0;
2050 }
2051
2052 extern struct pernet_operations __net_initdata loopback_net_ops;
2053
2054 static inline int dev_ethtool_get_settings(struct net_device *dev,
2055 struct ethtool_cmd *cmd)
2056 {
2057 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2058 return -EOPNOTSUPP;
2059 return dev->ethtool_ops->get_settings(dev, cmd);
2060 }
2061
2062 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2063 {
2064 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2065 return 0;
2066 return dev->ethtool_ops->get_rx_csum(dev);
2067 }
2068
2069 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2070 {
2071 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2072 return 0;
2073 return dev->ethtool_ops->get_flags(dev);
2074 }
2075 #endif /* __KERNEL__ */
2076
2077 #endif /* _LINUX_NETDEVICE_H */
AMDTP streaming driver for the Linux FireWire stack (Juju)