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[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 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
76 #define NET_RX_CN_MOD 3 /* Storm on its way! */
77 #define NET_RX_CN_HIGH 4 /* The storm is here */
78 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
79
80 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
81 * indicates that the device will soon be dropping packets, or already drops
82 * some packets of the same priority; prompting us to send less aggressively. */
83 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
84 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
85
86 #endif
87
88 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
89
90 /* Driver transmit return codes */
91 #define NETDEV_TX_OK 0 /* driver took care of packet */
92 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
93 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
94
95 #ifdef __KERNEL__
96
97 /*
98 * Compute the worst case header length according to the protocols
99 * used.
100 */
101
102 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
103 # if defined(CONFIG_MAC80211_MESH)
104 # define LL_MAX_HEADER 128
105 # else
106 # define LL_MAX_HEADER 96
107 # endif
108 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
109 # define LL_MAX_HEADER 48
110 #else
111 # define LL_MAX_HEADER 32
112 #endif
113
114 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
115 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
116 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
117 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
118 #define MAX_HEADER LL_MAX_HEADER
119 #else
120 #define MAX_HEADER (LL_MAX_HEADER + 48)
121 #endif
122
123 #endif /* __KERNEL__ */
124
125 /*
126 * Network device statistics. Akin to the 2.0 ether stats but
127 * with byte counters.
128 */
129
130 struct net_device_stats
131 {
132 unsigned long rx_packets; /* total packets received */
133 unsigned long tx_packets; /* total packets transmitted */
134 unsigned long rx_bytes; /* total bytes received */
135 unsigned long tx_bytes; /* total bytes transmitted */
136 unsigned long rx_errors; /* bad packets received */
137 unsigned long tx_errors; /* packet transmit problems */
138 unsigned long rx_dropped; /* no space in linux buffers */
139 unsigned long tx_dropped; /* no space available in linux */
140 unsigned long multicast; /* multicast packets received */
141 unsigned long collisions;
142
143 /* detailed rx_errors: */
144 unsigned long rx_length_errors;
145 unsigned long rx_over_errors; /* receiver ring buff overflow */
146 unsigned long rx_crc_errors; /* recved pkt with crc error */
147 unsigned long rx_frame_errors; /* recv'd frame alignment error */
148 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
149 unsigned long rx_missed_errors; /* receiver missed packet */
150
151 /* detailed tx_errors */
152 unsigned long tx_aborted_errors;
153 unsigned long tx_carrier_errors;
154 unsigned long tx_fifo_errors;
155 unsigned long tx_heartbeat_errors;
156 unsigned long tx_window_errors;
157
158 /* for cslip etc */
159 unsigned long rx_compressed;
160 unsigned long tx_compressed;
161 };
162
163
164 /* Media selection options. */
165 enum {
166 IF_PORT_UNKNOWN = 0,
167 IF_PORT_10BASE2,
168 IF_PORT_10BASET,
169 IF_PORT_AUI,
170 IF_PORT_100BASET,
171 IF_PORT_100BASETX,
172 IF_PORT_100BASEFX
173 };
174
175 #ifdef __KERNEL__
176
177 #include <linux/cache.h>
178 #include <linux/skbuff.h>
179
180 struct neighbour;
181 struct neigh_parms;
182 struct sk_buff;
183
184 struct netif_rx_stats
185 {
186 unsigned total;
187 unsigned dropped;
188 unsigned time_squeeze;
189 unsigned cpu_collision;
190 };
191
192 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
193
194 struct dev_addr_list
195 {
196 struct dev_addr_list *next;
197 u8 da_addr[MAX_ADDR_LEN];
198 u8 da_addrlen;
199 u8 da_synced;
200 int da_users;
201 int da_gusers;
202 };
203
204 /*
205 * We tag multicasts with these structures.
206 */
207
208 #define dev_mc_list dev_addr_list
209 #define dmi_addr da_addr
210 #define dmi_addrlen da_addrlen
211 #define dmi_users da_users
212 #define dmi_gusers da_gusers
213
214 struct netdev_hw_addr {
215 struct list_head list;
216 unsigned char addr[MAX_ADDR_LEN];
217 unsigned char type;
218 #define NETDEV_HW_ADDR_T_LAN 1
219 #define NETDEV_HW_ADDR_T_SAN 2
220 #define NETDEV_HW_ADDR_T_SLAVE 3
221 struct rcu_head rcu_head;
222 };
223
224 struct hh_cache
225 {
226 struct hh_cache *hh_next; /* Next entry */
227 atomic_t hh_refcnt; /* number of users */
228 /*
229 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
230 * cache line on SMP.
231 * They are mostly read, but hh_refcnt may be changed quite frequently,
232 * incurring cache line ping pongs.
233 */
234 __be16 hh_type ____cacheline_aligned_in_smp;
235 /* protocol identifier, f.e ETH_P_IP
236 * NOTE: For VLANs, this will be the
237 * encapuslated type. --BLG
238 */
239 u16 hh_len; /* length of header */
240 int (*hh_output)(struct sk_buff *skb);
241 seqlock_t hh_lock;
242
243 /* cached hardware header; allow for machine alignment needs. */
244 #define HH_DATA_MOD 16
245 #define HH_DATA_OFF(__len) \
246 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
247 #define HH_DATA_ALIGN(__len) \
248 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
249 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
250 };
251
252 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
253 * Alternative is:
254 * dev->hard_header_len ? (dev->hard_header_len +
255 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
256 *
257 * We could use other alignment values, but we must maintain the
258 * relationship HH alignment <= LL alignment.
259 *
260 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
261 * may need.
262 */
263 #define LL_RESERVED_SPACE(dev) \
264 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
265 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
266 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
267 #define LL_ALLOCATED_SPACE(dev) \
268 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
269
270 struct header_ops {
271 int (*create) (struct sk_buff *skb, struct net_device *dev,
272 unsigned short type, const void *daddr,
273 const void *saddr, unsigned len);
274 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
275 int (*rebuild)(struct sk_buff *skb);
276 #define HAVE_HEADER_CACHE
277 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
278 void (*cache_update)(struct hh_cache *hh,
279 const struct net_device *dev,
280 const unsigned char *haddr);
281 };
282
283 /* These flag bits are private to the generic network queueing
284 * layer, they may not be explicitly referenced by any other
285 * code.
286 */
287
288 enum netdev_state_t
289 {
290 __LINK_STATE_START,
291 __LINK_STATE_PRESENT,
292 __LINK_STATE_NOCARRIER,
293 __LINK_STATE_LINKWATCH_PENDING,
294 __LINK_STATE_DORMANT,
295 };
296
297
298 /*
299 * This structure holds at boot time configured netdevice settings. They
300 * are then used in the device probing.
301 */
302 struct netdev_boot_setup {
303 char name[IFNAMSIZ];
304 struct ifmap map;
305 };
306 #define NETDEV_BOOT_SETUP_MAX 8
307
308 extern int __init netdev_boot_setup(char *str);
309
310 /*
311 * Structure for NAPI scheduling similar to tasklet but with weighting
312 */
313 struct napi_struct {
314 /* The poll_list must only be managed by the entity which
315 * changes the state of the NAPI_STATE_SCHED bit. This means
316 * whoever atomically sets that bit can add this napi_struct
317 * to the per-cpu poll_list, and whoever clears that bit
318 * can remove from the list right before clearing the bit.
319 */
320 struct list_head poll_list;
321
322 unsigned long state;
323 int weight;
324 int (*poll)(struct napi_struct *, int);
325 #ifdef CONFIG_NETPOLL
326 spinlock_t poll_lock;
327 int poll_owner;
328 #endif
329
330 unsigned int gro_count;
331
332 struct net_device *dev;
333 struct list_head dev_list;
334 struct sk_buff *gro_list;
335 struct sk_buff *skb;
336 };
337
338 enum
339 {
340 NAPI_STATE_SCHED, /* Poll is scheduled */
341 NAPI_STATE_DISABLE, /* Disable pending */
342 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
343 };
344
345 enum {
346 GRO_MERGED,
347 GRO_MERGED_FREE,
348 GRO_HELD,
349 GRO_NORMAL,
350 GRO_DROP,
351 };
352
353 extern void __napi_schedule(struct napi_struct *n);
354
355 static inline int napi_disable_pending(struct napi_struct *n)
356 {
357 return test_bit(NAPI_STATE_DISABLE, &n->state);
358 }
359
360 /**
361 * napi_schedule_prep - check if napi can be scheduled
362 * @n: napi context
363 *
364 * Test if NAPI routine is already running, and if not mark
365 * it as running. This is used as a condition variable
366 * insure only one NAPI poll instance runs. We also make
367 * sure there is no pending NAPI disable.
368 */
369 static inline int napi_schedule_prep(struct napi_struct *n)
370 {
371 return !napi_disable_pending(n) &&
372 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
373 }
374
375 /**
376 * napi_schedule - schedule NAPI poll
377 * @n: napi context
378 *
379 * Schedule NAPI poll routine to be called if it is not already
380 * running.
381 */
382 static inline void napi_schedule(struct napi_struct *n)
383 {
384 if (napi_schedule_prep(n))
385 __napi_schedule(n);
386 }
387
388 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
389 static inline int napi_reschedule(struct napi_struct *napi)
390 {
391 if (napi_schedule_prep(napi)) {
392 __napi_schedule(napi);
393 return 1;
394 }
395 return 0;
396 }
397
398 /**
399 * napi_complete - NAPI processing complete
400 * @n: napi context
401 *
402 * Mark NAPI processing as complete.
403 */
404 extern void __napi_complete(struct napi_struct *n);
405 extern void napi_complete(struct napi_struct *n);
406
407 /**
408 * napi_disable - prevent NAPI from scheduling
409 * @n: napi context
410 *
411 * Stop NAPI from being scheduled on this context.
412 * Waits till any outstanding processing completes.
413 */
414 static inline void napi_disable(struct napi_struct *n)
415 {
416 set_bit(NAPI_STATE_DISABLE, &n->state);
417 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
418 msleep(1);
419 clear_bit(NAPI_STATE_DISABLE, &n->state);
420 }
421
422 /**
423 * napi_enable - enable NAPI scheduling
424 * @n: napi context
425 *
426 * Resume NAPI from being scheduled on this context.
427 * Must be paired with napi_disable.
428 */
429 static inline void napi_enable(struct napi_struct *n)
430 {
431 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
432 smp_mb__before_clear_bit();
433 clear_bit(NAPI_STATE_SCHED, &n->state);
434 }
435
436 #ifdef CONFIG_SMP
437 /**
438 * napi_synchronize - wait until NAPI is not running
439 * @n: napi context
440 *
441 * Wait until NAPI is done being scheduled on this context.
442 * Waits till any outstanding processing completes but
443 * does not disable future activations.
444 */
445 static inline void napi_synchronize(const struct napi_struct *n)
446 {
447 while (test_bit(NAPI_STATE_SCHED, &n->state))
448 msleep(1);
449 }
450 #else
451 # define napi_synchronize(n) barrier()
452 #endif
453
454 enum netdev_queue_state_t
455 {
456 __QUEUE_STATE_XOFF,
457 __QUEUE_STATE_FROZEN,
458 };
459
460 struct netdev_queue {
461 /*
462 * read mostly part
463 */
464 struct net_device *dev;
465 struct Qdisc *qdisc;
466 unsigned long state;
467 struct Qdisc *qdisc_sleeping;
468 /*
469 * write mostly part
470 */
471 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
472 int xmit_lock_owner;
473 /*
474 * please use this field instead of dev->trans_start
475 */
476 unsigned long trans_start;
477 } ____cacheline_aligned_in_smp;
478
479
480 /*
481 * This structure defines the management hooks for network devices.
482 * The following hooks can be defined; unless noted otherwise, they are
483 * optional and can be filled with a null pointer.
484 *
485 * int (*ndo_init)(struct net_device *dev);
486 * This function is called once when network device is registered.
487 * The network device can use this to any late stage initializaton
488 * or semantic validattion. It can fail with an error code which will
489 * be propogated back to register_netdev
490 *
491 * void (*ndo_uninit)(struct net_device *dev);
492 * This function is called when device is unregistered or when registration
493 * fails. It is not called if init fails.
494 *
495 * int (*ndo_open)(struct net_device *dev);
496 * This function is called when network device transistions to the up
497 * state.
498 *
499 * int (*ndo_stop)(struct net_device *dev);
500 * This function is called when network device transistions to the down
501 * state.
502 *
503 * int (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev);
504 * Called when a packet needs to be transmitted.
505 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED,
506 * Required can not be NULL.
507 *
508 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
509 * Called to decide which queue to when device supports multiple
510 * transmit queues.
511 *
512 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
513 * This function is called to allow device receiver to make
514 * changes to configuration when multicast or promiscious is enabled.
515 *
516 * void (*ndo_set_rx_mode)(struct net_device *dev);
517 * This function is called device changes address list filtering.
518 *
519 * void (*ndo_set_multicast_list)(struct net_device *dev);
520 * This function is called when the multicast address list changes.
521 *
522 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
523 * This function is called when the Media Access Control address
524 * needs to be changed. If this interface is not defined, the
525 * mac address can not be changed.
526 *
527 * int (*ndo_validate_addr)(struct net_device *dev);
528 * Test if Media Access Control address is valid for the device.
529 *
530 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
531 * Called when a user request an ioctl which can't be handled by
532 * the generic interface code. If not defined ioctl's return
533 * not supported error code.
534 *
535 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
536 * Used to set network devices bus interface parameters. This interface
537 * is retained for legacy reason, new devices should use the bus
538 * interface (PCI) for low level management.
539 *
540 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
541 * Called when a user wants to change the Maximum Transfer Unit
542 * of a device. If not defined, any request to change MTU will
543 * will return an error.
544 *
545 * void (*ndo_tx_timeout)(struct net_device *dev);
546 * Callback uses when the transmitter has not made any progress
547 * for dev->watchdog ticks.
548 *
549 * struct net_device_stats* (*get_stats)(struct net_device *dev);
550 * Called when a user wants to get the network device usage
551 * statistics. If not defined, the counters in dev->stats will
552 * be used.
553 *
554 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
555 * If device support VLAN receive accleration
556 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
557 * when vlan groups for the device changes. Note: grp is NULL
558 * if no vlan's groups are being used.
559 *
560 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
561 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
562 * this function is called when a VLAN id is registered.
563 *
564 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
565 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
566 * this function is called when a VLAN id is unregistered.
567 *
568 * void (*ndo_poll_controller)(struct net_device *dev);
569 */
570 #define HAVE_NET_DEVICE_OPS
571 struct net_device_ops {
572 int (*ndo_init)(struct net_device *dev);
573 void (*ndo_uninit)(struct net_device *dev);
574 int (*ndo_open)(struct net_device *dev);
575 int (*ndo_stop)(struct net_device *dev);
576 int (*ndo_start_xmit) (struct sk_buff *skb,
577 struct net_device *dev);
578 u16 (*ndo_select_queue)(struct net_device *dev,
579 struct sk_buff *skb);
580 #define HAVE_CHANGE_RX_FLAGS
581 void (*ndo_change_rx_flags)(struct net_device *dev,
582 int flags);
583 #define HAVE_SET_RX_MODE
584 void (*ndo_set_rx_mode)(struct net_device *dev);
585 #define HAVE_MULTICAST
586 void (*ndo_set_multicast_list)(struct net_device *dev);
587 #define HAVE_SET_MAC_ADDR
588 int (*ndo_set_mac_address)(struct net_device *dev,
589 void *addr);
590 #define HAVE_VALIDATE_ADDR
591 int (*ndo_validate_addr)(struct net_device *dev);
592 #define HAVE_PRIVATE_IOCTL
593 int (*ndo_do_ioctl)(struct net_device *dev,
594 struct ifreq *ifr, int cmd);
595 #define HAVE_SET_CONFIG
596 int (*ndo_set_config)(struct net_device *dev,
597 struct ifmap *map);
598 #define HAVE_CHANGE_MTU
599 int (*ndo_change_mtu)(struct net_device *dev,
600 int new_mtu);
601 int (*ndo_neigh_setup)(struct net_device *dev,
602 struct neigh_parms *);
603 #define HAVE_TX_TIMEOUT
604 void (*ndo_tx_timeout) (struct net_device *dev);
605
606 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
607
608 void (*ndo_vlan_rx_register)(struct net_device *dev,
609 struct vlan_group *grp);
610 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
611 unsigned short vid);
612 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
613 unsigned short vid);
614 #ifdef CONFIG_NET_POLL_CONTROLLER
615 #define HAVE_NETDEV_POLL
616 void (*ndo_poll_controller)(struct net_device *dev);
617 #endif
618 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
619 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
620 u16 xid,
621 struct scatterlist *sgl,
622 unsigned int sgc);
623 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
624 u16 xid);
625 #endif
626 };
627
628 /*
629 * The DEVICE structure.
630 * Actually, this whole structure is a big mistake. It mixes I/O
631 * data with strictly "high-level" data, and it has to know about
632 * almost every data structure used in the INET module.
633 *
634 * FIXME: cleanup struct net_device such that network protocol info
635 * moves out.
636 */
637
638 struct net_device
639 {
640
641 /*
642 * This is the first field of the "visible" part of this structure
643 * (i.e. as seen by users in the "Space.c" file). It is the name
644 * the interface.
645 */
646 char name[IFNAMSIZ];
647 /* device name hash chain */
648 struct hlist_node name_hlist;
649 /* snmp alias */
650 char *ifalias;
651
652 /*
653 * I/O specific fields
654 * FIXME: Merge these and struct ifmap into one
655 */
656 unsigned long mem_end; /* shared mem end */
657 unsigned long mem_start; /* shared mem start */
658 unsigned long base_addr; /* device I/O address */
659 unsigned int irq; /* device IRQ number */
660
661 /*
662 * Some hardware also needs these fields, but they are not
663 * part of the usual set specified in Space.c.
664 */
665
666 unsigned char if_port; /* Selectable AUI, TP,..*/
667 unsigned char dma; /* DMA channel */
668
669 unsigned long state;
670
671 struct list_head dev_list;
672 struct list_head napi_list;
673
674 /* Net device features */
675 unsigned long features;
676 #define NETIF_F_SG 1 /* Scatter/gather IO. */
677 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
678 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
679 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
680 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
681 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
682 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
683 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
684 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
685 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
686 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
687 #define NETIF_F_GSO 2048 /* Enable software GSO. */
688 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
689 /* do not use LLTX in new drivers */
690 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
691 #define NETIF_F_GRO 16384 /* Generic receive offload */
692 #define NETIF_F_LRO 32768 /* large receive offload */
693
694 /* the GSO_MASK reserves bits 16 through 23 */
695 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
696 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
697
698 /* Segmentation offload features */
699 #define NETIF_F_GSO_SHIFT 16
700 #define NETIF_F_GSO_MASK 0x00ff0000
701 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
702 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
703 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
704 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
705 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
706 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
707
708 /* List of features with software fallbacks. */
709 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
710
711
712 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
713 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
714 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
715 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
716
717 /*
718 * If one device supports one of these features, then enable them
719 * for all in netdev_increment_features.
720 */
721 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
722 NETIF_F_SG | NETIF_F_HIGHDMA | \
723 NETIF_F_FRAGLIST)
724
725 /* Interface index. Unique device identifier */
726 int ifindex;
727 int iflink;
728
729 struct net_device_stats stats;
730
731 #ifdef CONFIG_WIRELESS_EXT
732 /* List of functions to handle Wireless Extensions (instead of ioctl).
733 * See <net/iw_handler.h> for details. Jean II */
734 const struct iw_handler_def * wireless_handlers;
735 /* Instance data managed by the core of Wireless Extensions. */
736 struct iw_public_data * wireless_data;
737 #endif
738 /* Management operations */
739 const struct net_device_ops *netdev_ops;
740 const struct ethtool_ops *ethtool_ops;
741
742 /* Hardware header description */
743 const struct header_ops *header_ops;
744
745 unsigned int flags; /* interface flags (a la BSD) */
746 unsigned short gflags;
747 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
748 unsigned short padded; /* How much padding added by alloc_netdev() */
749
750 unsigned char operstate; /* RFC2863 operstate */
751 unsigned char link_mode; /* mapping policy to operstate */
752
753 unsigned mtu; /* interface MTU value */
754 unsigned short type; /* interface hardware type */
755 unsigned short hard_header_len; /* hardware hdr length */
756
757 /* extra head- and tailroom the hardware may need, but not in all cases
758 * can this be guaranteed, especially tailroom. Some cases also use
759 * LL_MAX_HEADER instead to allocate the skb.
760 */
761 unsigned short needed_headroom;
762 unsigned short needed_tailroom;
763
764 struct net_device *master; /* Pointer to master device of a group,
765 * which this device is member of.
766 */
767
768 /* Interface address info. */
769 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
770 unsigned char addr_len; /* hardware address length */
771 unsigned short dev_id; /* for shared network cards */
772
773 spinlock_t addr_list_lock;
774 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
775 int uc_count; /* Number of installed ucasts */
776 int uc_promisc;
777 struct dev_addr_list *mc_list; /* Multicast mac addresses */
778 int mc_count; /* Number of installed mcasts */
779 unsigned int promiscuity;
780 unsigned int allmulti;
781
782
783 /* Protocol specific pointers */
784
785 #ifdef CONFIG_NET_DSA
786 void *dsa_ptr; /* dsa specific data */
787 #endif
788 void *atalk_ptr; /* AppleTalk link */
789 void *ip_ptr; /* IPv4 specific data */
790 void *dn_ptr; /* DECnet specific data */
791 void *ip6_ptr; /* IPv6 specific data */
792 void *ec_ptr; /* Econet specific data */
793 void *ax25_ptr; /* AX.25 specific data */
794 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
795 assign before registering */
796
797 /*
798 * Cache line mostly used on receive path (including eth_type_trans())
799 */
800 unsigned long last_rx; /* Time of last Rx */
801 /* Interface address info used in eth_type_trans() */
802 unsigned char *dev_addr; /* hw address, (before bcast
803 because most packets are
804 unicast) */
805
806 struct list_head dev_addr_list; /* list of device hw addresses */
807
808 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
809
810 struct netdev_queue rx_queue;
811
812 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
813
814 /* Number of TX queues allocated at alloc_netdev_mq() time */
815 unsigned int num_tx_queues;
816
817 /* Number of TX queues currently active in device */
818 unsigned int real_num_tx_queues;
819
820 unsigned long tx_queue_len; /* Max frames per queue allowed */
821 spinlock_t tx_global_lock;
822 /*
823 * One part is mostly used on xmit path (device)
824 */
825 /* These may be needed for future network-power-down code. */
826
827 /*
828 * trans_start here is expensive for high speed devices on SMP,
829 * please use netdev_queue->trans_start instead.
830 */
831 unsigned long trans_start; /* Time (in jiffies) of last Tx */
832
833 int watchdog_timeo; /* used by dev_watchdog() */
834 struct timer_list watchdog_timer;
835
836 /* Number of references to this device */
837 atomic_t refcnt ____cacheline_aligned_in_smp;
838
839 /* delayed register/unregister */
840 struct list_head todo_list;
841 /* device index hash chain */
842 struct hlist_node index_hlist;
843
844 struct net_device *link_watch_next;
845
846 /* register/unregister state machine */
847 enum { NETREG_UNINITIALIZED=0,
848 NETREG_REGISTERED, /* completed register_netdevice */
849 NETREG_UNREGISTERING, /* called unregister_netdevice */
850 NETREG_UNREGISTERED, /* completed unregister todo */
851 NETREG_RELEASED, /* called free_netdev */
852 NETREG_DUMMY, /* dummy device for NAPI poll */
853 } reg_state;
854
855 /* Called from unregister, can be used to call free_netdev */
856 void (*destructor)(struct net_device *dev);
857
858 #ifdef CONFIG_NETPOLL
859 struct netpoll_info *npinfo;
860 #endif
861
862 #ifdef CONFIG_NET_NS
863 /* Network namespace this network device is inside */
864 struct net *nd_net;
865 #endif
866
867 /* mid-layer private */
868 void *ml_priv;
869
870 /* bridge stuff */
871 struct net_bridge_port *br_port;
872 /* macvlan */
873 struct macvlan_port *macvlan_port;
874 /* GARP */
875 struct garp_port *garp_port;
876
877 /* class/net/name entry */
878 struct device dev;
879 /* space for optional statistics and wireless sysfs groups */
880 struct attribute_group *sysfs_groups[3];
881
882 /* rtnetlink link ops */
883 const struct rtnl_link_ops *rtnl_link_ops;
884
885 /* VLAN feature mask */
886 unsigned long vlan_features;
887
888 /* for setting kernel sock attribute on TCP connection setup */
889 #define GSO_MAX_SIZE 65536
890 unsigned int gso_max_size;
891
892 #ifdef CONFIG_DCB
893 /* Data Center Bridging netlink ops */
894 struct dcbnl_rtnl_ops *dcbnl_ops;
895 #endif
896
897 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
898 /* max exchange id for FCoE LRO by ddp */
899 unsigned int fcoe_ddp_xid;
900 #endif
901
902 #ifdef CONFIG_COMPAT_NET_DEV_OPS
903 struct {
904 int (*init)(struct net_device *dev);
905 void (*uninit)(struct net_device *dev);
906 int (*open)(struct net_device *dev);
907 int (*stop)(struct net_device *dev);
908 int (*hard_start_xmit) (struct sk_buff *skb,
909 struct net_device *dev);
910 u16 (*select_queue)(struct net_device *dev,
911 struct sk_buff *skb);
912 void (*change_rx_flags)(struct net_device *dev,
913 int flags);
914 void (*set_rx_mode)(struct net_device *dev);
915 void (*set_multicast_list)(struct net_device *dev);
916 int (*set_mac_address)(struct net_device *dev,
917 void *addr);
918 int (*validate_addr)(struct net_device *dev);
919 int (*do_ioctl)(struct net_device *dev,
920 struct ifreq *ifr, int cmd);
921 int (*set_config)(struct net_device *dev,
922 struct ifmap *map);
923 int (*change_mtu)(struct net_device *dev, int new_mtu);
924 int (*neigh_setup)(struct net_device *dev,
925 struct neigh_parms *);
926 void (*tx_timeout) (struct net_device *dev);
927 struct net_device_stats* (*get_stats)(struct net_device *dev);
928 void (*vlan_rx_register)(struct net_device *dev,
929 struct vlan_group *grp);
930 void (*vlan_rx_add_vid)(struct net_device *dev,
931 unsigned short vid);
932 void (*vlan_rx_kill_vid)(struct net_device *dev,
933 unsigned short vid);
934 #ifdef CONFIG_NET_POLL_CONTROLLER
935 void (*poll_controller)(struct net_device *dev);
936 #endif
937 };
938 #endif
939 };
940 #define to_net_dev(d) container_of(d, struct net_device, dev)
941
942 #define NETDEV_ALIGN 32
943 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
944
945 static inline
946 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
947 unsigned int index)
948 {
949 return &dev->_tx[index];
950 }
951
952 static inline void netdev_for_each_tx_queue(struct net_device *dev,
953 void (*f)(struct net_device *,
954 struct netdev_queue *,
955 void *),
956 void *arg)
957 {
958 unsigned int i;
959
960 for (i = 0; i < dev->num_tx_queues; i++)
961 f(dev, &dev->_tx[i], arg);
962 }
963
964 /*
965 * Net namespace inlines
966 */
967 static inline
968 struct net *dev_net(const struct net_device *dev)
969 {
970 #ifdef CONFIG_NET_NS
971 return dev->nd_net;
972 #else
973 return &init_net;
974 #endif
975 }
976
977 static inline
978 void dev_net_set(struct net_device *dev, struct net *net)
979 {
980 #ifdef CONFIG_NET_NS
981 release_net(dev->nd_net);
982 dev->nd_net = hold_net(net);
983 #endif
984 }
985
986 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
987 {
988 #ifdef CONFIG_NET_DSA_TAG_DSA
989 if (dev->dsa_ptr != NULL)
990 return dsa_uses_dsa_tags(dev->dsa_ptr);
991 #endif
992
993 return 0;
994 }
995
996 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
997 {
998 #ifdef CONFIG_NET_DSA_TAG_TRAILER
999 if (dev->dsa_ptr != NULL)
1000 return dsa_uses_trailer_tags(dev->dsa_ptr);
1001 #endif
1002
1003 return 0;
1004 }
1005
1006 /**
1007 * netdev_priv - access network device private data
1008 * @dev: network device
1009 *
1010 * Get network device private data
1011 */
1012 static inline void *netdev_priv(const struct net_device *dev)
1013 {
1014 return (char *)dev + ((sizeof(struct net_device)
1015 + NETDEV_ALIGN_CONST)
1016 & ~NETDEV_ALIGN_CONST);
1017 }
1018
1019 /* Set the sysfs physical device reference for the network logical device
1020 * if set prior to registration will cause a symlink during initialization.
1021 */
1022 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1023
1024 /**
1025 * netif_napi_add - initialize a napi context
1026 * @dev: network device
1027 * @napi: napi context
1028 * @poll: polling function
1029 * @weight: default weight
1030 *
1031 * netif_napi_add() must be used to initialize a napi context prior to calling
1032 * *any* of the other napi related functions.
1033 */
1034 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1035 int (*poll)(struct napi_struct *, int), int weight);
1036
1037 /**
1038 * netif_napi_del - remove a napi context
1039 * @napi: napi context
1040 *
1041 * netif_napi_del() removes a napi context from the network device napi list
1042 */
1043 void netif_napi_del(struct napi_struct *napi);
1044
1045 struct napi_gro_cb {
1046 /* This indicates where we are processing relative to skb->data. */
1047 int data_offset;
1048
1049 /* This is non-zero if the packet may be of the same flow. */
1050 int same_flow;
1051
1052 /* This is non-zero if the packet cannot be merged with the new skb. */
1053 int flush;
1054
1055 /* Number of segments aggregated. */
1056 int count;
1057
1058 /* Free the skb? */
1059 int free;
1060 };
1061
1062 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1063
1064 struct packet_type {
1065 __be16 type; /* This is really htons(ether_type). */
1066 struct net_device *dev; /* NULL is wildcarded here */
1067 int (*func) (struct sk_buff *,
1068 struct net_device *,
1069 struct packet_type *,
1070 struct net_device *);
1071 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1072 int features);
1073 int (*gso_send_check)(struct sk_buff *skb);
1074 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1075 struct sk_buff *skb);
1076 int (*gro_complete)(struct sk_buff *skb);
1077 void *af_packet_priv;
1078 struct list_head list;
1079 };
1080
1081 #include <linux/interrupt.h>
1082 #include <linux/notifier.h>
1083
1084 extern rwlock_t dev_base_lock; /* Device list lock */
1085
1086
1087 #define for_each_netdev(net, d) \
1088 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1089 #define for_each_netdev_safe(net, d, n) \
1090 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1091 #define for_each_netdev_continue(net, d) \
1092 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1093 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1094
1095 static inline struct net_device *next_net_device(struct net_device *dev)
1096 {
1097 struct list_head *lh;
1098 struct net *net;
1099
1100 net = dev_net(dev);
1101 lh = dev->dev_list.next;
1102 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1103 }
1104
1105 static inline struct net_device *first_net_device(struct net *net)
1106 {
1107 return list_empty(&net->dev_base_head) ? NULL :
1108 net_device_entry(net->dev_base_head.next);
1109 }
1110
1111 extern int netdev_boot_setup_check(struct net_device *dev);
1112 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1113 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1114 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1115 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1116 extern void dev_add_pack(struct packet_type *pt);
1117 extern void dev_remove_pack(struct packet_type *pt);
1118 extern void __dev_remove_pack(struct packet_type *pt);
1119
1120 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1121 unsigned short mask);
1122 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1123 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1124 extern int dev_alloc_name(struct net_device *dev, const char *name);
1125 extern int dev_open(struct net_device *dev);
1126 extern int dev_close(struct net_device *dev);
1127 extern void dev_disable_lro(struct net_device *dev);
1128 extern int dev_queue_xmit(struct sk_buff *skb);
1129 extern int register_netdevice(struct net_device *dev);
1130 extern void unregister_netdevice(struct net_device *dev);
1131 extern void free_netdev(struct net_device *dev);
1132 extern void synchronize_net(void);
1133 extern int register_netdevice_notifier(struct notifier_block *nb);
1134 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1135 extern int init_dummy_netdev(struct net_device *dev);
1136 extern void netdev_resync_ops(struct net_device *dev);
1137
1138 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1139 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1140 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1141 extern int dev_restart(struct net_device *dev);
1142 #ifdef CONFIG_NETPOLL_TRAP
1143 extern int netpoll_trap(void);
1144 #endif
1145 extern void *skb_gro_header(struct sk_buff *skb, unsigned int hlen);
1146 extern int skb_gro_receive(struct sk_buff **head,
1147 struct sk_buff *skb);
1148
1149 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1150 {
1151 return NAPI_GRO_CB(skb)->data_offset;
1152 }
1153
1154 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1155 {
1156 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1157 }
1158
1159 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1160 {
1161 NAPI_GRO_CB(skb)->data_offset += len;
1162 }
1163
1164 static inline void skb_gro_reset_offset(struct sk_buff *skb)
1165 {
1166 NAPI_GRO_CB(skb)->data_offset = 0;
1167 }
1168
1169 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1170 {
1171 return skb_headlen(skb) ? skb_mac_header(skb) :
1172 page_address(skb_shinfo(skb)->frags[0].page) +
1173 skb_shinfo(skb)->frags[0].page_offset;
1174 }
1175
1176 static inline void *skb_gro_network_header(struct sk_buff *skb)
1177 {
1178 return skb_headlen(skb) ? skb_network_header(skb) :
1179 page_address(skb_shinfo(skb)->frags[0].page) +
1180 skb_shinfo(skb)->frags[0].page_offset + skb_network_offset(skb);
1181 }
1182
1183 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1184 unsigned short type,
1185 const void *daddr, const void *saddr,
1186 unsigned len)
1187 {
1188 if (!dev->header_ops || !dev->header_ops->create)
1189 return 0;
1190
1191 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1192 }
1193
1194 static inline int dev_parse_header(const struct sk_buff *skb,
1195 unsigned char *haddr)
1196 {
1197 const struct net_device *dev = skb->dev;
1198
1199 if (!dev->header_ops || !dev->header_ops->parse)
1200 return 0;
1201 return dev->header_ops->parse(skb, haddr);
1202 }
1203
1204 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1205 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1206 static inline int unregister_gifconf(unsigned int family)
1207 {
1208 return register_gifconf(family, NULL);
1209 }
1210
1211 /*
1212 * Incoming packets are placed on per-cpu queues so that
1213 * no locking is needed.
1214 */
1215 struct softnet_data
1216 {
1217 struct Qdisc *output_queue;
1218 struct sk_buff_head input_pkt_queue;
1219 struct list_head poll_list;
1220 struct sk_buff *completion_queue;
1221
1222 struct napi_struct backlog;
1223 };
1224
1225 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1226
1227 #define HAVE_NETIF_QUEUE
1228
1229 extern void __netif_schedule(struct Qdisc *q);
1230
1231 static inline void netif_schedule_queue(struct netdev_queue *txq)
1232 {
1233 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1234 __netif_schedule(txq->qdisc);
1235 }
1236
1237 static inline void netif_tx_schedule_all(struct net_device *dev)
1238 {
1239 unsigned int i;
1240
1241 for (i = 0; i < dev->num_tx_queues; i++)
1242 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1243 }
1244
1245 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1246 {
1247 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1248 }
1249
1250 /**
1251 * netif_start_queue - allow transmit
1252 * @dev: network device
1253 *
1254 * Allow upper layers to call the device hard_start_xmit routine.
1255 */
1256 static inline void netif_start_queue(struct net_device *dev)
1257 {
1258 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1259 }
1260
1261 static inline void netif_tx_start_all_queues(struct net_device *dev)
1262 {
1263 unsigned int i;
1264
1265 for (i = 0; i < dev->num_tx_queues; i++) {
1266 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1267 netif_tx_start_queue(txq);
1268 }
1269 }
1270
1271 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1272 {
1273 #ifdef CONFIG_NETPOLL_TRAP
1274 if (netpoll_trap()) {
1275 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1276 return;
1277 }
1278 #endif
1279 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1280 __netif_schedule(dev_queue->qdisc);
1281 }
1282
1283 /**
1284 * netif_wake_queue - restart transmit
1285 * @dev: network device
1286 *
1287 * Allow upper layers to call the device hard_start_xmit routine.
1288 * Used for flow control when transmit resources are available.
1289 */
1290 static inline void netif_wake_queue(struct net_device *dev)
1291 {
1292 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1293 }
1294
1295 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1296 {
1297 unsigned int i;
1298
1299 for (i = 0; i < dev->num_tx_queues; i++) {
1300 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1301 netif_tx_wake_queue(txq);
1302 }
1303 }
1304
1305 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1306 {
1307 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1308 }
1309
1310 /**
1311 * netif_stop_queue - stop transmitted packets
1312 * @dev: network device
1313 *
1314 * Stop upper layers calling the device hard_start_xmit routine.
1315 * Used for flow control when transmit resources are unavailable.
1316 */
1317 static inline void netif_stop_queue(struct net_device *dev)
1318 {
1319 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1320 }
1321
1322 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1323 {
1324 unsigned int i;
1325
1326 for (i = 0; i < dev->num_tx_queues; i++) {
1327 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1328 netif_tx_stop_queue(txq);
1329 }
1330 }
1331
1332 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1333 {
1334 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1335 }
1336
1337 /**
1338 * netif_queue_stopped - test if transmit queue is flowblocked
1339 * @dev: network device
1340 *
1341 * Test if transmit queue on device is currently unable to send.
1342 */
1343 static inline int netif_queue_stopped(const struct net_device *dev)
1344 {
1345 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1346 }
1347
1348 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1349 {
1350 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1351 }
1352
1353 /**
1354 * netif_running - test if up
1355 * @dev: network device
1356 *
1357 * Test if the device has been brought up.
1358 */
1359 static inline int netif_running(const struct net_device *dev)
1360 {
1361 return test_bit(__LINK_STATE_START, &dev->state);
1362 }
1363
1364 /*
1365 * Routines to manage the subqueues on a device. We only need start
1366 * stop, and a check if it's stopped. All other device management is
1367 * done at the overall netdevice level.
1368 * Also test the device if we're multiqueue.
1369 */
1370
1371 /**
1372 * netif_start_subqueue - allow sending packets on subqueue
1373 * @dev: network device
1374 * @queue_index: sub queue index
1375 *
1376 * Start individual transmit queue of a device with multiple transmit queues.
1377 */
1378 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1379 {
1380 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1381 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
1382 }
1383
1384 /**
1385 * netif_stop_subqueue - stop sending packets on subqueue
1386 * @dev: network device
1387 * @queue_index: sub queue index
1388 *
1389 * Stop individual transmit queue of a device with multiple transmit queues.
1390 */
1391 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1392 {
1393 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1394 #ifdef CONFIG_NETPOLL_TRAP
1395 if (netpoll_trap())
1396 return;
1397 #endif
1398 set_bit(__QUEUE_STATE_XOFF, &txq->state);
1399 }
1400
1401 /**
1402 * netif_subqueue_stopped - test status of subqueue
1403 * @dev: network device
1404 * @queue_index: sub queue index
1405 *
1406 * Check individual transmit queue of a device with multiple transmit queues.
1407 */
1408 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1409 u16 queue_index)
1410 {
1411 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1412 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
1413 }
1414
1415 static inline int netif_subqueue_stopped(const struct net_device *dev,
1416 struct sk_buff *skb)
1417 {
1418 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1419 }
1420
1421 /**
1422 * netif_wake_subqueue - allow sending packets on subqueue
1423 * @dev: network device
1424 * @queue_index: sub queue index
1425 *
1426 * Resume individual transmit queue of a device with multiple transmit queues.
1427 */
1428 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1429 {
1430 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1431 #ifdef CONFIG_NETPOLL_TRAP
1432 if (netpoll_trap())
1433 return;
1434 #endif
1435 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1436 __netif_schedule(txq->qdisc);
1437 }
1438
1439 /**
1440 * netif_is_multiqueue - test if device has multiple transmit queues
1441 * @dev: network device
1442 *
1443 * Check if device has multiple transmit queues
1444 */
1445 static inline int netif_is_multiqueue(const struct net_device *dev)
1446 {
1447 return (dev->num_tx_queues > 1);
1448 }
1449
1450 /* Use this variant when it is known for sure that it
1451 * is executing from hardware interrupt context or with hardware interrupts
1452 * disabled.
1453 */
1454 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1455
1456 /* Use this variant in places where it could be invoked
1457 * from either hardware interrupt or other context, with hardware interrupts
1458 * either disabled or enabled.
1459 */
1460 extern void dev_kfree_skb_any(struct sk_buff *skb);
1461
1462 #define HAVE_NETIF_RX 1
1463 extern int netif_rx(struct sk_buff *skb);
1464 extern int netif_rx_ni(struct sk_buff *skb);
1465 #define HAVE_NETIF_RECEIVE_SKB 1
1466 extern int netif_receive_skb(struct sk_buff *skb);
1467 extern void napi_gro_flush(struct napi_struct *napi);
1468 extern int dev_gro_receive(struct napi_struct *napi,
1469 struct sk_buff *skb);
1470 extern int napi_skb_finish(int ret, struct sk_buff *skb);
1471 extern int napi_gro_receive(struct napi_struct *napi,
1472 struct sk_buff *skb);
1473 extern void napi_reuse_skb(struct napi_struct *napi,
1474 struct sk_buff *skb);
1475 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1476 extern int napi_frags_finish(struct napi_struct *napi,
1477 struct sk_buff *skb, int ret);
1478 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1479 extern int napi_gro_frags(struct napi_struct *napi);
1480
1481 static inline void napi_free_frags(struct napi_struct *napi)
1482 {
1483 kfree_skb(napi->skb);
1484 napi->skb = NULL;
1485 }
1486
1487 extern void netif_nit_deliver(struct sk_buff *skb);
1488 extern int dev_valid_name(const char *name);
1489 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1490 extern int dev_ethtool(struct net *net, struct ifreq *);
1491 extern unsigned dev_get_flags(const struct net_device *);
1492 extern int dev_change_flags(struct net_device *, unsigned);
1493 extern int dev_change_name(struct net_device *, const char *);
1494 extern int dev_set_alias(struct net_device *, const char *, size_t);
1495 extern int dev_change_net_namespace(struct net_device *,
1496 struct net *, const char *);
1497 extern int dev_set_mtu(struct net_device *, int);
1498 extern int dev_set_mac_address(struct net_device *,
1499 struct sockaddr *);
1500 extern int dev_hard_start_xmit(struct sk_buff *skb,
1501 struct net_device *dev,
1502 struct netdev_queue *txq);
1503
1504 extern int netdev_budget;
1505
1506 /* Called by rtnetlink.c:rtnl_unlock() */
1507 extern void netdev_run_todo(void);
1508
1509 /**
1510 * dev_put - release reference to device
1511 * @dev: network device
1512 *
1513 * Release reference to device to allow it to be freed.
1514 */
1515 static inline void dev_put(struct net_device *dev)
1516 {
1517 atomic_dec(&dev->refcnt);
1518 }
1519
1520 /**
1521 * dev_hold - get reference to device
1522 * @dev: network device
1523 *
1524 * Hold reference to device to keep it from being freed.
1525 */
1526 static inline void dev_hold(struct net_device *dev)
1527 {
1528 atomic_inc(&dev->refcnt);
1529 }
1530
1531 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1532 * and _off may be called from IRQ context, but it is caller
1533 * who is responsible for serialization of these calls.
1534 *
1535 * The name carrier is inappropriate, these functions should really be
1536 * called netif_lowerlayer_*() because they represent the state of any
1537 * kind of lower layer not just hardware media.
1538 */
1539
1540 extern void linkwatch_fire_event(struct net_device *dev);
1541
1542 /**
1543 * netif_carrier_ok - test if carrier present
1544 * @dev: network device
1545 *
1546 * Check if carrier is present on device
1547 */
1548 static inline int netif_carrier_ok(const struct net_device *dev)
1549 {
1550 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1551 }
1552
1553 extern unsigned long dev_trans_start(struct net_device *dev);
1554
1555 extern void __netdev_watchdog_up(struct net_device *dev);
1556
1557 extern void netif_carrier_on(struct net_device *dev);
1558
1559 extern void netif_carrier_off(struct net_device *dev);
1560
1561 /**
1562 * netif_dormant_on - mark device as dormant.
1563 * @dev: network device
1564 *
1565 * Mark device as dormant (as per RFC2863).
1566 *
1567 * The dormant state indicates that the relevant interface is not
1568 * actually in a condition to pass packets (i.e., it is not 'up') but is
1569 * in a "pending" state, waiting for some external event. For "on-
1570 * demand" interfaces, this new state identifies the situation where the
1571 * interface is waiting for events to place it in the up state.
1572 *
1573 */
1574 static inline void netif_dormant_on(struct net_device *dev)
1575 {
1576 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1577 linkwatch_fire_event(dev);
1578 }
1579
1580 /**
1581 * netif_dormant_off - set device as not dormant.
1582 * @dev: network device
1583 *
1584 * Device is not in dormant state.
1585 */
1586 static inline void netif_dormant_off(struct net_device *dev)
1587 {
1588 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1589 linkwatch_fire_event(dev);
1590 }
1591
1592 /**
1593 * netif_dormant - test if carrier present
1594 * @dev: network device
1595 *
1596 * Check if carrier is present on device
1597 */
1598 static inline int netif_dormant(const struct net_device *dev)
1599 {
1600 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1601 }
1602
1603
1604 /**
1605 * netif_oper_up - test if device is operational
1606 * @dev: network device
1607 *
1608 * Check if carrier is operational
1609 */
1610 static inline int netif_oper_up(const struct net_device *dev) {
1611 return (dev->operstate == IF_OPER_UP ||
1612 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1613 }
1614
1615 /**
1616 * netif_device_present - is device available or removed
1617 * @dev: network device
1618 *
1619 * Check if device has not been removed from system.
1620 */
1621 static inline int netif_device_present(struct net_device *dev)
1622 {
1623 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1624 }
1625
1626 extern void netif_device_detach(struct net_device *dev);
1627
1628 extern void netif_device_attach(struct net_device *dev);
1629
1630 /*
1631 * Network interface message level settings
1632 */
1633 #define HAVE_NETIF_MSG 1
1634
1635 enum {
1636 NETIF_MSG_DRV = 0x0001,
1637 NETIF_MSG_PROBE = 0x0002,
1638 NETIF_MSG_LINK = 0x0004,
1639 NETIF_MSG_TIMER = 0x0008,
1640 NETIF_MSG_IFDOWN = 0x0010,
1641 NETIF_MSG_IFUP = 0x0020,
1642 NETIF_MSG_RX_ERR = 0x0040,
1643 NETIF_MSG_TX_ERR = 0x0080,
1644 NETIF_MSG_TX_QUEUED = 0x0100,
1645 NETIF_MSG_INTR = 0x0200,
1646 NETIF_MSG_TX_DONE = 0x0400,
1647 NETIF_MSG_RX_STATUS = 0x0800,
1648 NETIF_MSG_PKTDATA = 0x1000,
1649 NETIF_MSG_HW = 0x2000,
1650 NETIF_MSG_WOL = 0x4000,
1651 };
1652
1653 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1654 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1655 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1656 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1657 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1658 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1659 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1660 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1661 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1662 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1663 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1664 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1665 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1666 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1667 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1668
1669 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1670 {
1671 /* use default */
1672 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1673 return default_msg_enable_bits;
1674 if (debug_value == 0) /* no output */
1675 return 0;
1676 /* set low N bits */
1677 return (1 << debug_value) - 1;
1678 }
1679
1680 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1681 {
1682 spin_lock(&txq->_xmit_lock);
1683 txq->xmit_lock_owner = cpu;
1684 }
1685
1686 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1687 {
1688 spin_lock_bh(&txq->_xmit_lock);
1689 txq->xmit_lock_owner = smp_processor_id();
1690 }
1691
1692 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1693 {
1694 int ok = spin_trylock(&txq->_xmit_lock);
1695 if (likely(ok))
1696 txq->xmit_lock_owner = smp_processor_id();
1697 return ok;
1698 }
1699
1700 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1701 {
1702 txq->xmit_lock_owner = -1;
1703 spin_unlock(&txq->_xmit_lock);
1704 }
1705
1706 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1707 {
1708 txq->xmit_lock_owner = -1;
1709 spin_unlock_bh(&txq->_xmit_lock);
1710 }
1711
1712 /**
1713 * netif_tx_lock - grab network device transmit lock
1714 * @dev: network device
1715 *
1716 * Get network device transmit lock
1717 */
1718 static inline void netif_tx_lock(struct net_device *dev)
1719 {
1720 unsigned int i;
1721 int cpu;
1722
1723 spin_lock(&dev->tx_global_lock);
1724 cpu = smp_processor_id();
1725 for (i = 0; i < dev->num_tx_queues; i++) {
1726 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1727
1728 /* We are the only thread of execution doing a
1729 * freeze, but we have to grab the _xmit_lock in
1730 * order to synchronize with threads which are in
1731 * the ->hard_start_xmit() handler and already
1732 * checked the frozen bit.
1733 */
1734 __netif_tx_lock(txq, cpu);
1735 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1736 __netif_tx_unlock(txq);
1737 }
1738 }
1739
1740 static inline void netif_tx_lock_bh(struct net_device *dev)
1741 {
1742 local_bh_disable();
1743 netif_tx_lock(dev);
1744 }
1745
1746 static inline void netif_tx_unlock(struct net_device *dev)
1747 {
1748 unsigned int i;
1749
1750 for (i = 0; i < dev->num_tx_queues; i++) {
1751 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1752
1753 /* No need to grab the _xmit_lock here. If the
1754 * queue is not stopped for another reason, we
1755 * force a schedule.
1756 */
1757 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1758 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1759 __netif_schedule(txq->qdisc);
1760 }
1761 spin_unlock(&dev->tx_global_lock);
1762 }
1763
1764 static inline void netif_tx_unlock_bh(struct net_device *dev)
1765 {
1766 netif_tx_unlock(dev);
1767 local_bh_enable();
1768 }
1769
1770 #define HARD_TX_LOCK(dev, txq, cpu) { \
1771 if ((dev->features & NETIF_F_LLTX) == 0) { \
1772 __netif_tx_lock(txq, cpu); \
1773 } \
1774 }
1775
1776 #define HARD_TX_UNLOCK(dev, txq) { \
1777 if ((dev->features & NETIF_F_LLTX) == 0) { \
1778 __netif_tx_unlock(txq); \
1779 } \
1780 }
1781
1782 static inline void netif_tx_disable(struct net_device *dev)
1783 {
1784 unsigned int i;
1785 int cpu;
1786
1787 local_bh_disable();
1788 cpu = smp_processor_id();
1789 for (i = 0; i < dev->num_tx_queues; i++) {
1790 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1791
1792 __netif_tx_lock(txq, cpu);
1793 netif_tx_stop_queue(txq);
1794 __netif_tx_unlock(txq);
1795 }
1796 local_bh_enable();
1797 }
1798
1799 static inline void netif_addr_lock(struct net_device *dev)
1800 {
1801 spin_lock(&dev->addr_list_lock);
1802 }
1803
1804 static inline void netif_addr_lock_bh(struct net_device *dev)
1805 {
1806 spin_lock_bh(&dev->addr_list_lock);
1807 }
1808
1809 static inline void netif_addr_unlock(struct net_device *dev)
1810 {
1811 spin_unlock(&dev->addr_list_lock);
1812 }
1813
1814 static inline void netif_addr_unlock_bh(struct net_device *dev)
1815 {
1816 spin_unlock_bh(&dev->addr_list_lock);
1817 }
1818
1819 /*
1820 * dev_addr_list walker. Should be used only for read access. Call with
1821 * rcu_read_lock held.
1822 */
1823 #define for_each_dev_addr(dev, ha) \
1824 list_for_each_entry_rcu(ha, &dev->dev_addr_list, list)
1825
1826 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1827
1828 extern void ether_setup(struct net_device *dev);
1829
1830 /* Support for loadable net-drivers */
1831 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1832 void (*setup)(struct net_device *),
1833 unsigned int queue_count);
1834 #define alloc_netdev(sizeof_priv, name, setup) \
1835 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1836 extern int register_netdev(struct net_device *dev);
1837 extern void unregister_netdev(struct net_device *dev);
1838
1839 /* Functions used for device addresses handling */
1840 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
1841 unsigned char addr_type);
1842 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
1843 unsigned char addr_type);
1844 extern int dev_addr_add_multiple(struct net_device *to_dev,
1845 struct net_device *from_dev,
1846 unsigned char addr_type);
1847 extern int dev_addr_del_multiple(struct net_device *to_dev,
1848 struct net_device *from_dev,
1849 unsigned char addr_type);
1850
1851 /* Functions used for secondary unicast and multicast support */
1852 extern void dev_set_rx_mode(struct net_device *dev);
1853 extern void __dev_set_rx_mode(struct net_device *dev);
1854 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1855 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1856 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1857 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1858 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1859 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1860 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1861 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1862 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1863 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1864 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1865 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1866 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1867 extern int dev_set_allmulti(struct net_device *dev, int inc);
1868 extern void netdev_state_change(struct net_device *dev);
1869 extern void netdev_bonding_change(struct net_device *dev);
1870 extern void netdev_features_change(struct net_device *dev);
1871 /* Load a device via the kmod */
1872 extern void dev_load(struct net *net, const char *name);
1873 extern void dev_mcast_init(void);
1874 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1875
1876 extern int netdev_max_backlog;
1877 extern int weight_p;
1878 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1879 extern int skb_checksum_help(struct sk_buff *skb);
1880 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1881 #ifdef CONFIG_BUG
1882 extern void netdev_rx_csum_fault(struct net_device *dev);
1883 #else
1884 static inline void netdev_rx_csum_fault(struct net_device *dev)
1885 {
1886 }
1887 #endif
1888 /* rx skb timestamps */
1889 extern void net_enable_timestamp(void);
1890 extern void net_disable_timestamp(void);
1891
1892 #ifdef CONFIG_PROC_FS
1893 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1894 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1895 extern void dev_seq_stop(struct seq_file *seq, void *v);
1896 #endif
1897
1898 extern int netdev_class_create_file(struct class_attribute *class_attr);
1899 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1900
1901 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1902
1903 extern void linkwatch_run_queue(void);
1904
1905 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1906 unsigned long mask);
1907 unsigned long netdev_fix_features(unsigned long features, const char *name);
1908
1909 static inline int net_gso_ok(int features, int gso_type)
1910 {
1911 int feature = gso_type << NETIF_F_GSO_SHIFT;
1912 return (features & feature) == feature;
1913 }
1914
1915 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1916 {
1917 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1918 }
1919
1920 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1921 {
1922 return skb_is_gso(skb) &&
1923 (!skb_gso_ok(skb, dev->features) ||
1924 (skb_shinfo(skb)->frag_list &&
1925 !(dev->features & NETIF_F_FRAGLIST)) ||
1926 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1927 }
1928
1929 static inline void netif_set_gso_max_size(struct net_device *dev,
1930 unsigned int size)
1931 {
1932 dev->gso_max_size = size;
1933 }
1934
1935 /* On bonding slaves other than the currently active slave, suppress
1936 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1937 * ARP on active-backup slaves with arp_validate enabled.
1938 */
1939 static inline int skb_bond_should_drop(struct sk_buff *skb)
1940 {
1941 struct net_device *dev = skb->dev;
1942 struct net_device *master = dev->master;
1943
1944 if (master) {
1945 if (master->priv_flags & IFF_MASTER_ARPMON)
1946 dev->last_rx = jiffies;
1947
1948 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
1949 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1950 skb->protocol == __cpu_to_be16(ETH_P_ARP))
1951 return 0;
1952
1953 if (master->priv_flags & IFF_MASTER_ALB) {
1954 if (skb->pkt_type != PACKET_BROADCAST &&
1955 skb->pkt_type != PACKET_MULTICAST)
1956 return 0;
1957 }
1958 if (master->priv_flags & IFF_MASTER_8023AD &&
1959 skb->protocol == __cpu_to_be16(ETH_P_SLOW))
1960 return 0;
1961
1962 return 1;
1963 }
1964 }
1965 return 0;
1966 }
1967
1968 extern struct pernet_operations __net_initdata loopback_net_ops;
1969
1970 static inline int dev_ethtool_get_settings(struct net_device *dev,
1971 struct ethtool_cmd *cmd)
1972 {
1973 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
1974 return -EOPNOTSUPP;
1975 return dev->ethtool_ops->get_settings(dev, cmd);
1976 }
1977
1978 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
1979 {
1980 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
1981 return 0;
1982 return dev->ethtool_ops->get_rx_csum(dev);
1983 }
1984
1985 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
1986 {
1987 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
1988 return 0;
1989 return dev->ethtool_ops->get_flags(dev);
1990 }
1991 #endif /* __KERNEL__ */
1992
1993 #endif /* _LINUX_DEV_H */
Linux kernel - Deliverables
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