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 <asm/atomic.h>
36 #include <asm/cache.h>
37 #include <asm/byteorder.h>
38
39 #include <linux/device.h>
40 #include <linux/percpu.h>
41 #include <linux/dmaengine.h>
42 #include <linux/workqueue.h>
43
44 #include <net/net_namespace.h>
45 #include <net/dsa.h>
46 #ifdef CONFIG_DCB
47 #include <net/dcbnl.h>
48 #endif
49
50 struct vlan_group;
51 struct ethtool_ops;
52 struct netpoll_info;
53 /* 802.11 specific */
54 struct wireless_dev;
55 /* source back-compat hooks */
56 #define SET_ETHTOOL_OPS(netdev,ops) \
57 ( (netdev)->ethtool_ops = (ops) )
58
59 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
60 functions are available. */
61 #define HAVE_FREE_NETDEV /* free_netdev() */
62 #define HAVE_NETDEV_PRIV /* netdev_priv() */
63
64 #define NET_XMIT_SUCCESS 0
65 #define NET_XMIT_DROP 1 /* skb dropped */
66 #define NET_XMIT_CN 2 /* congestion notification */
67 #define NET_XMIT_POLICED 3 /* skb is shot by police */
68 #define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */
69
70 /* Backlog congestion levels */
71 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
72 #define NET_RX_DROP 1 /* packet dropped */
73 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
74 #define NET_RX_CN_MOD 3 /* Storm on its way! */
75 #define NET_RX_CN_HIGH 4 /* The storm is here */
76 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
77
78 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
79 * indicates that the device will soon be dropping packets, or already drops
80 * some packets of the same priority; prompting us to send less aggressively. */
81 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
82 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
83
84 #endif
85
86 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
87
88 /* Driver transmit return codes */
89 #define NETDEV_TX_OK 0 /* driver took care of packet */
90 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
91 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
92
93 #ifdef __KERNEL__
94
95 /*
96 * Compute the worst case header length according to the protocols
97 * used.
98 */
99
100 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
101 # if defined(CONFIG_MAC80211_MESH)
102 # define LL_MAX_HEADER 128
103 # else
104 # define LL_MAX_HEADER 96
105 # endif
106 #elif defined(CONFIG_TR)
107 # define LL_MAX_HEADER 48
108 #else
109 # define LL_MAX_HEADER 32
110 #endif
111
112 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
113 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
114 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
115 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
116 #define MAX_HEADER LL_MAX_HEADER
117 #else
118 #define MAX_HEADER (LL_MAX_HEADER + 48)
119 #endif
120
121 #endif /* __KERNEL__ */
122
123 /*
124 * Network device statistics. Akin to the 2.0 ether stats but
125 * with byte counters.
126 */
127
128 struct net_device_stats
129 {
130 unsigned long rx_packets; /* total packets received */
131 unsigned long tx_packets; /* total packets transmitted */
132 unsigned long rx_bytes; /* total bytes received */
133 unsigned long tx_bytes; /* total bytes transmitted */
134 unsigned long rx_errors; /* bad packets received */
135 unsigned long tx_errors; /* packet transmit problems */
136 unsigned long rx_dropped; /* no space in linux buffers */
137 unsigned long tx_dropped; /* no space available in linux */
138 unsigned long multicast; /* multicast packets received */
139 unsigned long collisions;
140
141 /* detailed rx_errors: */
142 unsigned long rx_length_errors;
143 unsigned long rx_over_errors; /* receiver ring buff overflow */
144 unsigned long rx_crc_errors; /* recved pkt with crc error */
145 unsigned long rx_frame_errors; /* recv'd frame alignment error */
146 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
147 unsigned long rx_missed_errors; /* receiver missed packet */
148
149 /* detailed tx_errors */
150 unsigned long tx_aborted_errors;
151 unsigned long tx_carrier_errors;
152 unsigned long tx_fifo_errors;
153 unsigned long tx_heartbeat_errors;
154 unsigned long tx_window_errors;
155
156 /* for cslip etc */
157 unsigned long rx_compressed;
158 unsigned long tx_compressed;
159 };
160
161
162 /* Media selection options. */
163 enum {
164 IF_PORT_UNKNOWN = 0,
165 IF_PORT_10BASE2,
166 IF_PORT_10BASET,
167 IF_PORT_AUI,
168 IF_PORT_100BASET,
169 IF_PORT_100BASETX,
170 IF_PORT_100BASEFX
171 };
172
173 #ifdef __KERNEL__
174
175 #include <linux/cache.h>
176 #include <linux/skbuff.h>
177
178 struct neighbour;
179 struct neigh_parms;
180 struct sk_buff;
181
182 struct netif_rx_stats
183 {
184 unsigned total;
185 unsigned dropped;
186 unsigned time_squeeze;
187 unsigned cpu_collision;
188 };
189
190 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
191
192 struct dev_addr_list
193 {
194 struct dev_addr_list *next;
195 u8 da_addr[MAX_ADDR_LEN];
196 u8 da_addrlen;
197 u8 da_synced;
198 int da_users;
199 int da_gusers;
200 };
201
202 /*
203 * We tag multicasts with these structures.
204 */
205
206 #define dev_mc_list dev_addr_list
207 #define dmi_addr da_addr
208 #define dmi_addrlen da_addrlen
209 #define dmi_users da_users
210 #define dmi_gusers da_gusers
211
212 struct hh_cache
213 {
214 struct hh_cache *hh_next; /* Next entry */
215 atomic_t hh_refcnt; /* number of users */
216 /*
217 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
218 * cache line on SMP.
219 * They are mostly read, but hh_refcnt may be changed quite frequently,
220 * incurring cache line ping pongs.
221 */
222 __be16 hh_type ____cacheline_aligned_in_smp;
223 /* protocol identifier, f.e ETH_P_IP
224 * NOTE: For VLANs, this will be the
225 * encapuslated type. --BLG
226 */
227 u16 hh_len; /* length of header */
228 int (*hh_output)(struct sk_buff *skb);
229 seqlock_t hh_lock;
230
231 /* cached hardware header; allow for machine alignment needs. */
232 #define HH_DATA_MOD 16
233 #define HH_DATA_OFF(__len) \
234 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
235 #define HH_DATA_ALIGN(__len) \
236 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
237 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
238 };
239
240 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
241 * Alternative is:
242 * dev->hard_header_len ? (dev->hard_header_len +
243 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
244 *
245 * We could use other alignment values, but we must maintain the
246 * relationship HH alignment <= LL alignment.
247 *
248 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
249 * may need.
250 */
251 #define LL_RESERVED_SPACE(dev) \
252 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
253 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
254 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
255 #define LL_ALLOCATED_SPACE(dev) \
256 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
257
258 struct header_ops {
259 int (*create) (struct sk_buff *skb, struct net_device *dev,
260 unsigned short type, const void *daddr,
261 const void *saddr, unsigned len);
262 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
263 int (*rebuild)(struct sk_buff *skb);
264 #define HAVE_HEADER_CACHE
265 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
266 void (*cache_update)(struct hh_cache *hh,
267 const struct net_device *dev,
268 const unsigned char *haddr);
269 };
270
271 /* These flag bits are private to the generic network queueing
272 * layer, they may not be explicitly referenced by any other
273 * code.
274 */
275
276 enum netdev_state_t
277 {
278 __LINK_STATE_START,
279 __LINK_STATE_PRESENT,
280 __LINK_STATE_NOCARRIER,
281 __LINK_STATE_LINKWATCH_PENDING,
282 __LINK_STATE_DORMANT,
283 };
284
285
286 /*
287 * This structure holds at boot time configured netdevice settings. They
288 * are then used in the device probing.
289 */
290 struct netdev_boot_setup {
291 char name[IFNAMSIZ];
292 struct ifmap map;
293 };
294 #define NETDEV_BOOT_SETUP_MAX 8
295
296 extern int __init netdev_boot_setup(char *str);
297
298 /*
299 * Structure for NAPI scheduling similar to tasklet but with weighting
300 */
301 struct napi_struct {
302 /* The poll_list must only be managed by the entity which
303 * changes the state of the NAPI_STATE_SCHED bit. This means
304 * whoever atomically sets that bit can add this napi_struct
305 * to the per-cpu poll_list, and whoever clears that bit
306 * can remove from the list right before clearing the bit.
307 */
308 struct list_head poll_list;
309
310 unsigned long state;
311 int weight;
312 int (*poll)(struct napi_struct *, int);
313 #ifdef CONFIG_NETPOLL
314 spinlock_t poll_lock;
315 int poll_owner;
316 #endif
317 struct net_device *dev;
318 struct list_head dev_list;
319 struct sk_buff *gro_list;
320 struct sk_buff *skb;
321 };
322
323 enum
324 {
325 NAPI_STATE_SCHED, /* Poll is scheduled */
326 NAPI_STATE_DISABLE, /* Disable pending */
327 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
328 };
329
330 extern void __napi_schedule(struct napi_struct *n);
331
napi_disable_pending(struct napi_struct * n)332 static inline int napi_disable_pending(struct napi_struct *n)
333 {
334 return test_bit(NAPI_STATE_DISABLE, &n->state);
335 }
336
337 /**
338 * napi_schedule_prep - check if napi can be scheduled
339 * @n: napi context
340 *
341 * Test if NAPI routine is already running, and if not mark
342 * it as running. This is used as a condition variable
343 * insure only one NAPI poll instance runs. We also make
344 * sure there is no pending NAPI disable.
345 */
napi_schedule_prep(struct napi_struct * n)346 static inline int napi_schedule_prep(struct napi_struct *n)
347 {
348 return !napi_disable_pending(n) &&
349 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
350 }
351
352 /**
353 * napi_schedule - schedule NAPI poll
354 * @n: napi context
355 *
356 * Schedule NAPI poll routine to be called if it is not already
357 * running.
358 */
napi_schedule(struct napi_struct * n)359 static inline void napi_schedule(struct napi_struct *n)
360 {
361 if (napi_schedule_prep(n))
362 __napi_schedule(n);
363 }
364
365 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
napi_reschedule(struct napi_struct * napi)366 static inline int napi_reschedule(struct napi_struct *napi)
367 {
368 if (napi_schedule_prep(napi)) {
369 __napi_schedule(napi);
370 return 1;
371 }
372 return 0;
373 }
374
375 /**
376 * napi_complete - NAPI processing complete
377 * @n: napi context
378 *
379 * Mark NAPI processing as complete.
380 */
381 extern void __napi_complete(struct napi_struct *n);
382 extern void napi_complete(struct napi_struct *n);
383
384 /**
385 * napi_disable - prevent NAPI from scheduling
386 * @n: napi context
387 *
388 * Stop NAPI from being scheduled on this context.
389 * Waits till any outstanding processing completes.
390 */
napi_disable(struct napi_struct * n)391 static inline void napi_disable(struct napi_struct *n)
392 {
393 set_bit(NAPI_STATE_DISABLE, &n->state);
394 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
395 msleep(1);
396 clear_bit(NAPI_STATE_DISABLE, &n->state);
397 }
398
399 /**
400 * napi_enable - enable NAPI scheduling
401 * @n: napi context
402 *
403 * Resume NAPI from being scheduled on this context.
404 * Must be paired with napi_disable.
405 */
napi_enable(struct napi_struct * n)406 static inline void napi_enable(struct napi_struct *n)
407 {
408 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
409 smp_mb__before_clear_bit();
410 clear_bit(NAPI_STATE_SCHED, &n->state);
411 }
412
413 #ifdef CONFIG_SMP
414 /**
415 * napi_synchronize - wait until NAPI is not running
416 * @n: napi context
417 *
418 * Wait until NAPI is done being scheduled on this context.
419 * Waits till any outstanding processing completes but
420 * does not disable future activations.
421 */
napi_synchronize(const struct napi_struct * n)422 static inline void napi_synchronize(const struct napi_struct *n)
423 {
424 while (test_bit(NAPI_STATE_SCHED, &n->state))
425 msleep(1);
426 }
427 #else
428 # define napi_synchronize(n) barrier()
429 #endif
430
431 enum netdev_queue_state_t
432 {
433 __QUEUE_STATE_XOFF,
434 __QUEUE_STATE_FROZEN,
435 };
436
437 struct netdev_queue {
438 struct net_device *dev;
439 struct Qdisc *qdisc;
440 unsigned long state;
441 spinlock_t _xmit_lock;
442 int xmit_lock_owner;
443 struct Qdisc *qdisc_sleeping;
444 } ____cacheline_aligned_in_smp;
445
446
447 /*
448 * This structure defines the management hooks for network devices.
449 * The following hooks can be defined; unless noted otherwise, they are
450 * optional and can be filled with a null pointer.
451 *
452 * int (*ndo_init)(struct net_device *dev);
453 * This function is called once when network device is registered.
454 * The network device can use this to any late stage initializaton
455 * or semantic validattion. It can fail with an error code which will
456 * be propogated back to register_netdev
457 *
458 * void (*ndo_uninit)(struct net_device *dev);
459 * This function is called when device is unregistered or when registration
460 * fails. It is not called if init fails.
461 *
462 * int (*ndo_open)(struct net_device *dev);
463 * This function is called when network device transistions to the up
464 * state.
465 *
466 * int (*ndo_stop)(struct net_device *dev);
467 * This function is called when network device transistions to the down
468 * state.
469 *
470 * int (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev);
471 * Called when a packet needs to be transmitted.
472 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED,
473 * Required can not be NULL.
474 *
475 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
476 * Called to decide which queue to when device supports multiple
477 * transmit queues.
478 *
479 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
480 * This function is called to allow device receiver to make
481 * changes to configuration when multicast or promiscious is enabled.
482 *
483 * void (*ndo_set_rx_mode)(struct net_device *dev);
484 * This function is called device changes address list filtering.
485 *
486 * void (*ndo_set_multicast_list)(struct net_device *dev);
487 * This function is called when the multicast address list changes.
488 *
489 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
490 * This function is called when the Media Access Control address
491 * needs to be changed. If not this interface is not defined, the
492 * mac address can not be changed.
493 *
494 * int (*ndo_validate_addr)(struct net_device *dev);
495 * Test if Media Access Control address is valid for the device.
496 *
497 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
498 * Called when a user request an ioctl which can't be handled by
499 * the generic interface code. If not defined ioctl's return
500 * not supported error code.
501 *
502 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
503 * Used to set network devices bus interface parameters. This interface
504 * is retained for legacy reason, new devices should use the bus
505 * interface (PCI) for low level management.
506 *
507 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
508 * Called when a user wants to change the Maximum Transfer Unit
509 * of a device. If not defined, any request to change MTU will
510 * will return an error.
511 *
512 * void (*ndo_tx_timeout)(struct net_device *dev);
513 * Callback uses when the transmitter has not made any progress
514 * for dev->watchdog ticks.
515 *
516 * struct net_device_stats* (*get_stats)(struct net_device *dev);
517 * Called when a user wants to get the network device usage
518 * statistics. If not defined, the counters in dev->stats will
519 * be used.
520 *
521 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
522 * If device support VLAN receive accleration
523 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
524 * when vlan groups for the device changes. Note: grp is NULL
525 * if no vlan's groups are being used.
526 *
527 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
528 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
529 * this function is called when a VLAN id is registered.
530 *
531 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
532 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
533 * this function is called when a VLAN id is unregistered.
534 *
535 * void (*ndo_poll_controller)(struct net_device *dev);
536 */
537 #define HAVE_NET_DEVICE_OPS
538 struct net_device_ops {
539 int (*ndo_init)(struct net_device *dev);
540 void (*ndo_uninit)(struct net_device *dev);
541 int (*ndo_open)(struct net_device *dev);
542 int (*ndo_stop)(struct net_device *dev);
543 int (*ndo_start_xmit) (struct sk_buff *skb,
544 struct net_device *dev);
545 u16 (*ndo_select_queue)(struct net_device *dev,
546 struct sk_buff *skb);
547 #define HAVE_CHANGE_RX_FLAGS
548 void (*ndo_change_rx_flags)(struct net_device *dev,
549 int flags);
550 #define HAVE_SET_RX_MODE
551 void (*ndo_set_rx_mode)(struct net_device *dev);
552 #define HAVE_MULTICAST
553 void (*ndo_set_multicast_list)(struct net_device *dev);
554 #define HAVE_SET_MAC_ADDR
555 int (*ndo_set_mac_address)(struct net_device *dev,
556 void *addr);
557 #define HAVE_VALIDATE_ADDR
558 int (*ndo_validate_addr)(struct net_device *dev);
559 #define HAVE_PRIVATE_IOCTL
560 int (*ndo_do_ioctl)(struct net_device *dev,
561 struct ifreq *ifr, int cmd);
562 #define HAVE_SET_CONFIG
563 int (*ndo_set_config)(struct net_device *dev,
564 struct ifmap *map);
565 #define HAVE_CHANGE_MTU
566 int (*ndo_change_mtu)(struct net_device *dev,
567 int new_mtu);
568 int (*ndo_neigh_setup)(struct net_device *dev,
569 struct neigh_parms *);
570 #define HAVE_TX_TIMEOUT
571 void (*ndo_tx_timeout) (struct net_device *dev);
572
573 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
574
575 void (*ndo_vlan_rx_register)(struct net_device *dev,
576 struct vlan_group *grp);
577 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
578 unsigned short vid);
579 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
580 unsigned short vid);
581 #ifdef CONFIG_NET_POLL_CONTROLLER
582 #define HAVE_NETDEV_POLL
583 void (*ndo_poll_controller)(struct net_device *dev);
584 #endif
585 };
586
587 /*
588 * The DEVICE structure.
589 * Actually, this whole structure is a big mistake. It mixes I/O
590 * data with strictly "high-level" data, and it has to know about
591 * almost every data structure used in the INET module.
592 *
593 * FIXME: cleanup struct net_device such that network protocol info
594 * moves out.
595 */
596
597 struct net_device
598 {
599
600 /*
601 * This is the first field of the "visible" part of this structure
602 * (i.e. as seen by users in the "Space.c" file). It is the name
603 * the interface.
604 */
605 char name[IFNAMSIZ];
606 /* device name hash chain */
607 struct hlist_node name_hlist;
608 /* snmp alias */
609 char *ifalias;
610
611 /*
612 * I/O specific fields
613 * FIXME: Merge these and struct ifmap into one
614 */
615 unsigned long mem_end; /* shared mem end */
616 unsigned long mem_start; /* shared mem start */
617 unsigned long base_addr; /* device I/O address */
618 unsigned int irq; /* device IRQ number */
619
620 /*
621 * Some hardware also needs these fields, but they are not
622 * part of the usual set specified in Space.c.
623 */
624
625 unsigned char if_port; /* Selectable AUI, TP,..*/
626 unsigned char dma; /* DMA channel */
627
628 unsigned long state;
629
630 struct list_head dev_list;
631 struct list_head napi_list;
632
633 /* Net device features */
634 unsigned long features;
635 #define NETIF_F_SG 1 /* Scatter/gather IO. */
636 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
637 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
638 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
639 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
640 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
641 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
642 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
643 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
644 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
645 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
646 #define NETIF_F_GSO 2048 /* Enable software GSO. */
647 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
648 /* do not use LLTX in new drivers */
649 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
650 #define NETIF_F_GRO 16384 /* Generic receive offload */
651 #define NETIF_F_LRO 32768 /* large receive offload */
652
653 /* Segmentation offload features */
654 #define NETIF_F_GSO_SHIFT 16
655 #define NETIF_F_GSO_MASK 0xffff0000
656 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
657 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
658 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
659 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
660 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
661
662 /* List of features with software fallbacks. */
663 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
664
665
666 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
667 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
668 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
669 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
670
671 /*
672 * If one device supports one of these features, then enable them
673 * for all in netdev_increment_features.
674 */
675 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
676 NETIF_F_SG | NETIF_F_HIGHDMA | \
677 NETIF_F_FRAGLIST)
678
679 /* Interface index. Unique device identifier */
680 int ifindex;
681 int iflink;
682
683 struct net_device_stats stats;
684
685 #ifdef CONFIG_WIRELESS_EXT
686 /* List of functions to handle Wireless Extensions (instead of ioctl).
687 * See <net/iw_handler.h> for details. Jean II */
688 const struct iw_handler_def * wireless_handlers;
689 /* Instance data managed by the core of Wireless Extensions. */
690 struct iw_public_data * wireless_data;
691 #endif
692 /* Management operations */
693 const struct net_device_ops *netdev_ops;
694 const struct ethtool_ops *ethtool_ops;
695
696 /* Hardware header description */
697 const struct header_ops *header_ops;
698
699 unsigned int flags; /* interface flags (a la BSD) */
700 unsigned short gflags;
701 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
702 unsigned short padded; /* How much padding added by alloc_netdev() */
703
704 unsigned char operstate; /* RFC2863 operstate */
705 unsigned char link_mode; /* mapping policy to operstate */
706
707 unsigned mtu; /* interface MTU value */
708 unsigned short type; /* interface hardware type */
709 unsigned short hard_header_len; /* hardware hdr length */
710
711 /* extra head- and tailroom the hardware may need, but not in all cases
712 * can this be guaranteed, especially tailroom. Some cases also use
713 * LL_MAX_HEADER instead to allocate the skb.
714 */
715 unsigned short needed_headroom;
716 unsigned short needed_tailroom;
717
718 struct net_device *master; /* Pointer to master device of a group,
719 * which this device is member of.
720 */
721
722 /* Interface address info. */
723 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
724 unsigned char addr_len; /* hardware address length */
725 unsigned short dev_id; /* for shared network cards */
726
727 spinlock_t addr_list_lock;
728 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
729 int uc_count; /* Number of installed ucasts */
730 int uc_promisc;
731 struct dev_addr_list *mc_list; /* Multicast mac addresses */
732 int mc_count; /* Number of installed mcasts */
733 unsigned int promiscuity;
734 unsigned int allmulti;
735
736
737 /* Protocol specific pointers */
738
739 #ifdef CONFIG_NET_DSA
740 void *dsa_ptr; /* dsa specific data */
741 #endif
742 void *atalk_ptr; /* AppleTalk link */
743 void *ip_ptr; /* IPv4 specific data */
744 void *dn_ptr; /* DECnet specific data */
745 void *ip6_ptr; /* IPv6 specific data */
746 void *ec_ptr; /* Econet specific data */
747 void *ax25_ptr; /* AX.25 specific data */
748 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
749 assign before registering */
750
751 /*
752 * Cache line mostly used on receive path (including eth_type_trans())
753 */
754 unsigned long last_rx; /* Time of last Rx */
755 /* Interface address info used in eth_type_trans() */
756 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
757 because most packets are unicast) */
758
759 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
760
761 struct netdev_queue rx_queue;
762
763 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
764
765 /* Number of TX queues allocated at alloc_netdev_mq() time */
766 unsigned int num_tx_queues;
767
768 /* Number of TX queues currently active in device */
769 unsigned int real_num_tx_queues;
770
771 unsigned long tx_queue_len; /* Max frames per queue allowed */
772 spinlock_t tx_global_lock;
773 /*
774 * One part is mostly used on xmit path (device)
775 */
776 /* These may be needed for future network-power-down code. */
777 unsigned long trans_start; /* Time (in jiffies) of last Tx */
778
779 int watchdog_timeo; /* used by dev_watchdog() */
780 struct timer_list watchdog_timer;
781
782 /* Number of references to this device */
783 atomic_t refcnt ____cacheline_aligned_in_smp;
784
785 /* delayed register/unregister */
786 struct list_head todo_list;
787 /* device index hash chain */
788 struct hlist_node index_hlist;
789
790 struct net_device *link_watch_next;
791
792 /* register/unregister state machine */
793 enum { NETREG_UNINITIALIZED=0,
794 NETREG_REGISTERED, /* completed register_netdevice */
795 NETREG_UNREGISTERING, /* called unregister_netdevice */
796 NETREG_UNREGISTERED, /* completed unregister todo */
797 NETREG_RELEASED, /* called free_netdev */
798 NETREG_DUMMY, /* dummy device for NAPI poll */
799 } reg_state;
800
801 /* Called from unregister, can be used to call free_netdev */
802 void (*destructor)(struct net_device *dev);
803
804 #ifdef CONFIG_NETPOLL
805 struct netpoll_info *npinfo;
806 #endif
807
808 #ifdef CONFIG_NET_NS
809 /* Network namespace this network device is inside */
810 struct net *nd_net;
811 #endif
812
813 /* mid-layer private */
814 void *ml_priv;
815
816 /* bridge stuff */
817 struct net_bridge_port *br_port;
818 /* macvlan */
819 struct macvlan_port *macvlan_port;
820 /* GARP */
821 struct garp_port *garp_port;
822
823 /* class/net/name entry */
824 struct device dev;
825 /* space for optional statistics and wireless sysfs groups */
826 struct attribute_group *sysfs_groups[3];
827
828 /* rtnetlink link ops */
829 const struct rtnl_link_ops *rtnl_link_ops;
830
831 /* VLAN feature mask */
832 unsigned long vlan_features;
833
834 /* for setting kernel sock attribute on TCP connection setup */
835 #define GSO_MAX_SIZE 65536
836 unsigned int gso_max_size;
837
838 #ifdef CONFIG_DCB
839 /* Data Center Bridging netlink ops */
840 struct dcbnl_rtnl_ops *dcbnl_ops;
841 #endif
842
843 #ifdef CONFIG_COMPAT_NET_DEV_OPS
844 struct {
845 int (*init)(struct net_device *dev);
846 void (*uninit)(struct net_device *dev);
847 int (*open)(struct net_device *dev);
848 int (*stop)(struct net_device *dev);
849 int (*hard_start_xmit) (struct sk_buff *skb,
850 struct net_device *dev);
851 u16 (*select_queue)(struct net_device *dev,
852 struct sk_buff *skb);
853 void (*change_rx_flags)(struct net_device *dev,
854 int flags);
855 void (*set_rx_mode)(struct net_device *dev);
856 void (*set_multicast_list)(struct net_device *dev);
857 int (*set_mac_address)(struct net_device *dev,
858 void *addr);
859 int (*validate_addr)(struct net_device *dev);
860 int (*do_ioctl)(struct net_device *dev,
861 struct ifreq *ifr, int cmd);
862 int (*set_config)(struct net_device *dev,
863 struct ifmap *map);
864 int (*change_mtu)(struct net_device *dev, int new_mtu);
865 int (*neigh_setup)(struct net_device *dev,
866 struct neigh_parms *);
867 void (*tx_timeout) (struct net_device *dev);
868 struct net_device_stats* (*get_stats)(struct net_device *dev);
869 void (*vlan_rx_register)(struct net_device *dev,
870 struct vlan_group *grp);
871 void (*vlan_rx_add_vid)(struct net_device *dev,
872 unsigned short vid);
873 void (*vlan_rx_kill_vid)(struct net_device *dev,
874 unsigned short vid);
875 #ifdef CONFIG_NET_POLL_CONTROLLER
876 void (*poll_controller)(struct net_device *dev);
877 #endif
878 };
879 #endif
880 };
881 #define to_net_dev(d) container_of(d, struct net_device, dev)
882
883 #define NETDEV_ALIGN 32
884 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
885
886 static inline
netdev_get_tx_queue(const struct net_device * dev,unsigned int index)887 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
888 unsigned int index)
889 {
890 return &dev->_tx[index];
891 }
892
netdev_for_each_tx_queue(struct net_device * dev,void (* f)(struct net_device *,struct netdev_queue *,void *),void * arg)893 static inline void netdev_for_each_tx_queue(struct net_device *dev,
894 void (*f)(struct net_device *,
895 struct netdev_queue *,
896 void *),
897 void *arg)
898 {
899 unsigned int i;
900
901 for (i = 0; i < dev->num_tx_queues; i++)
902 f(dev, &dev->_tx[i], arg);
903 }
904
905 /*
906 * Net namespace inlines
907 */
908 static inline
dev_net(const struct net_device * dev)909 struct net *dev_net(const struct net_device *dev)
910 {
911 #ifdef CONFIG_NET_NS
912 return dev->nd_net;
913 #else
914 return &init_net;
915 #endif
916 }
917
918 static inline
dev_net_set(struct net_device * dev,struct net * net)919 void dev_net_set(struct net_device *dev, struct net *net)
920 {
921 #ifdef CONFIG_NET_NS
922 release_net(dev->nd_net);
923 dev->nd_net = hold_net(net);
924 #endif
925 }
926
netdev_uses_dsa_tags(struct net_device * dev)927 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
928 {
929 #ifdef CONFIG_NET_DSA_TAG_DSA
930 if (dev->dsa_ptr != NULL)
931 return dsa_uses_dsa_tags(dev->dsa_ptr);
932 #endif
933
934 return 0;
935 }
936
netdev_uses_trailer_tags(struct net_device * dev)937 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
938 {
939 #ifdef CONFIG_NET_DSA_TAG_TRAILER
940 if (dev->dsa_ptr != NULL)
941 return dsa_uses_trailer_tags(dev->dsa_ptr);
942 #endif
943
944 return 0;
945 }
946
947 /**
948 * netdev_priv - access network device private data
949 * @dev: network device
950 *
951 * Get network device private data
952 */
netdev_priv(const struct net_device * dev)953 static inline void *netdev_priv(const struct net_device *dev)
954 {
955 return (char *)dev + ((sizeof(struct net_device)
956 + NETDEV_ALIGN_CONST)
957 & ~NETDEV_ALIGN_CONST);
958 }
959
960 /* Set the sysfs physical device reference for the network logical device
961 * if set prior to registration will cause a symlink during initialization.
962 */
963 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
964
965 /**
966 * netif_napi_add - initialize a napi context
967 * @dev: network device
968 * @napi: napi context
969 * @poll: polling function
970 * @weight: default weight
971 *
972 * netif_napi_add() must be used to initialize a napi context prior to calling
973 * *any* of the other napi related functions.
974 */
975 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
976 int (*poll)(struct napi_struct *, int), int weight);
977
978 /**
979 * netif_napi_del - remove a napi context
980 * @napi: napi context
981 *
982 * netif_napi_del() removes a napi context from the network device napi list
983 */
984 void netif_napi_del(struct napi_struct *napi);
985
986 struct napi_gro_cb {
987 /* This is non-zero if the packet may be of the same flow. */
988 int same_flow;
989
990 /* This is non-zero if the packet cannot be merged with the new skb. */
991 int flush;
992
993 /* Number of segments aggregated. */
994 int count;
995
996 /* Free the skb? */
997 int free;
998 };
999
1000 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1001
1002 struct packet_type {
1003 __be16 type; /* This is really htons(ether_type). */
1004 struct net_device *dev; /* NULL is wildcarded here */
1005 int (*func) (struct sk_buff *,
1006 struct net_device *,
1007 struct packet_type *,
1008 struct net_device *);
1009 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1010 int features);
1011 int (*gso_send_check)(struct sk_buff *skb);
1012 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1013 struct sk_buff *skb);
1014 int (*gro_complete)(struct sk_buff *skb);
1015 void *af_packet_priv;
1016 struct list_head list;
1017 };
1018
1019 struct napi_gro_fraginfo {
1020 skb_frag_t frags[MAX_SKB_FRAGS];
1021 unsigned int nr_frags;
1022 unsigned int ip_summed;
1023 unsigned int len;
1024 __wsum csum;
1025 };
1026
1027 #include <linux/interrupt.h>
1028 #include <linux/notifier.h>
1029
1030 extern rwlock_t dev_base_lock; /* Device list lock */
1031
1032
1033 #define for_each_netdev(net, d) \
1034 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1035 #define for_each_netdev_safe(net, d, n) \
1036 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1037 #define for_each_netdev_continue(net, d) \
1038 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1039 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1040
next_net_device(struct net_device * dev)1041 static inline struct net_device *next_net_device(struct net_device *dev)
1042 {
1043 struct list_head *lh;
1044 struct net *net;
1045
1046 net = dev_net(dev);
1047 lh = dev->dev_list.next;
1048 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1049 }
1050
first_net_device(struct net * net)1051 static inline struct net_device *first_net_device(struct net *net)
1052 {
1053 return list_empty(&net->dev_base_head) ? NULL :
1054 net_device_entry(net->dev_base_head.next);
1055 }
1056
1057 extern int netdev_boot_setup_check(struct net_device *dev);
1058 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1059 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1060 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1061 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1062 extern void dev_add_pack(struct packet_type *pt);
1063 extern void dev_remove_pack(struct packet_type *pt);
1064 extern void __dev_remove_pack(struct packet_type *pt);
1065
1066 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1067 unsigned short mask);
1068 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1069 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1070 extern int dev_alloc_name(struct net_device *dev, const char *name);
1071 extern int dev_open(struct net_device *dev);
1072 extern int dev_close(struct net_device *dev);
1073 extern void dev_disable_lro(struct net_device *dev);
1074 extern int dev_queue_xmit(struct sk_buff *skb);
1075 extern int register_netdevice(struct net_device *dev);
1076 extern void unregister_netdevice(struct net_device *dev);
1077 extern void free_netdev(struct net_device *dev);
1078 extern void synchronize_net(void);
1079 extern int register_netdevice_notifier(struct notifier_block *nb);
1080 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1081 extern int init_dummy_netdev(struct net_device *dev);
1082 extern void netdev_resync_ops(struct net_device *dev);
1083
1084 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1085 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1086 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1087 extern int dev_restart(struct net_device *dev);
1088 #ifdef CONFIG_NETPOLL_TRAP
1089 extern int netpoll_trap(void);
1090 #endif
1091
dev_hard_header(struct sk_buff * skb,struct net_device * dev,unsigned short type,const void * daddr,const void * saddr,unsigned len)1092 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1093 unsigned short type,
1094 const void *daddr, const void *saddr,
1095 unsigned len)
1096 {
1097 if (!dev->header_ops || !dev->header_ops->create)
1098 return 0;
1099
1100 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1101 }
1102
dev_parse_header(const struct sk_buff * skb,unsigned char * haddr)1103 static inline int dev_parse_header(const struct sk_buff *skb,
1104 unsigned char *haddr)
1105 {
1106 const struct net_device *dev = skb->dev;
1107
1108 if (!dev->header_ops || !dev->header_ops->parse)
1109 return 0;
1110 return dev->header_ops->parse(skb, haddr);
1111 }
1112
1113 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1114 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
unregister_gifconf(unsigned int family)1115 static inline int unregister_gifconf(unsigned int family)
1116 {
1117 return register_gifconf(family, NULL);
1118 }
1119
1120 /*
1121 * Incoming packets are placed on per-cpu queues so that
1122 * no locking is needed.
1123 */
1124 struct softnet_data
1125 {
1126 struct Qdisc *output_queue;
1127 struct sk_buff_head input_pkt_queue;
1128 struct list_head poll_list;
1129 struct sk_buff *completion_queue;
1130
1131 struct napi_struct backlog;
1132 };
1133
1134 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1135
1136 #define HAVE_NETIF_QUEUE
1137
1138 extern void __netif_schedule(struct Qdisc *q);
1139
netif_schedule_queue(struct netdev_queue * txq)1140 static inline void netif_schedule_queue(struct netdev_queue *txq)
1141 {
1142 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1143 __netif_schedule(txq->qdisc);
1144 }
1145
netif_tx_schedule_all(struct net_device * dev)1146 static inline void netif_tx_schedule_all(struct net_device *dev)
1147 {
1148 unsigned int i;
1149
1150 for (i = 0; i < dev->num_tx_queues; i++)
1151 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1152 }
1153
netif_tx_start_queue(struct netdev_queue * dev_queue)1154 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1155 {
1156 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1157 }
1158
1159 /**
1160 * netif_start_queue - allow transmit
1161 * @dev: network device
1162 *
1163 * Allow upper layers to call the device hard_start_xmit routine.
1164 */
netif_start_queue(struct net_device * dev)1165 static inline void netif_start_queue(struct net_device *dev)
1166 {
1167 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1168 }
1169
netif_tx_start_all_queues(struct net_device * dev)1170 static inline void netif_tx_start_all_queues(struct net_device *dev)
1171 {
1172 unsigned int i;
1173
1174 for (i = 0; i < dev->num_tx_queues; i++) {
1175 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1176 netif_tx_start_queue(txq);
1177 }
1178 }
1179
netif_tx_wake_queue(struct netdev_queue * dev_queue)1180 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1181 {
1182 #ifdef CONFIG_NETPOLL_TRAP
1183 if (netpoll_trap()) {
1184 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1185 return;
1186 }
1187 #endif
1188 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1189 __netif_schedule(dev_queue->qdisc);
1190 }
1191
1192 /**
1193 * netif_wake_queue - restart transmit
1194 * @dev: network device
1195 *
1196 * Allow upper layers to call the device hard_start_xmit routine.
1197 * Used for flow control when transmit resources are available.
1198 */
netif_wake_queue(struct net_device * dev)1199 static inline void netif_wake_queue(struct net_device *dev)
1200 {
1201 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1202 }
1203
netif_tx_wake_all_queues(struct net_device * dev)1204 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1205 {
1206 unsigned int i;
1207
1208 for (i = 0; i < dev->num_tx_queues; i++) {
1209 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1210 netif_tx_wake_queue(txq);
1211 }
1212 }
1213
netif_tx_stop_queue(struct netdev_queue * dev_queue)1214 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1215 {
1216 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1217 }
1218
1219 /**
1220 * netif_stop_queue - stop transmitted packets
1221 * @dev: network device
1222 *
1223 * Stop upper layers calling the device hard_start_xmit routine.
1224 * Used for flow control when transmit resources are unavailable.
1225 */
netif_stop_queue(struct net_device * dev)1226 static inline void netif_stop_queue(struct net_device *dev)
1227 {
1228 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1229 }
1230
netif_tx_stop_all_queues(struct net_device * dev)1231 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1232 {
1233 unsigned int i;
1234
1235 for (i = 0; i < dev->num_tx_queues; i++) {
1236 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1237 netif_tx_stop_queue(txq);
1238 }
1239 }
1240
netif_tx_queue_stopped(const struct netdev_queue * dev_queue)1241 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1242 {
1243 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1244 }
1245
1246 /**
1247 * netif_queue_stopped - test if transmit queue is flowblocked
1248 * @dev: network device
1249 *
1250 * Test if transmit queue on device is currently unable to send.
1251 */
netif_queue_stopped(const struct net_device * dev)1252 static inline int netif_queue_stopped(const struct net_device *dev)
1253 {
1254 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1255 }
1256
netif_tx_queue_frozen(const struct netdev_queue * dev_queue)1257 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1258 {
1259 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1260 }
1261
1262 /**
1263 * netif_running - test if up
1264 * @dev: network device
1265 *
1266 * Test if the device has been brought up.
1267 */
netif_running(const struct net_device * dev)1268 static inline int netif_running(const struct net_device *dev)
1269 {
1270 return test_bit(__LINK_STATE_START, &dev->state);
1271 }
1272
1273 /*
1274 * Routines to manage the subqueues on a device. We only need start
1275 * stop, and a check if it's stopped. All other device management is
1276 * done at the overall netdevice level.
1277 * Also test the device if we're multiqueue.
1278 */
1279
1280 /**
1281 * netif_start_subqueue - allow sending packets on subqueue
1282 * @dev: network device
1283 * @queue_index: sub queue index
1284 *
1285 * Start individual transmit queue of a device with multiple transmit queues.
1286 */
netif_start_subqueue(struct net_device * dev,u16 queue_index)1287 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1288 {
1289 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1290 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
1291 }
1292
1293 /**
1294 * netif_stop_subqueue - stop sending packets on subqueue
1295 * @dev: network device
1296 * @queue_index: sub queue index
1297 *
1298 * Stop individual transmit queue of a device with multiple transmit queues.
1299 */
netif_stop_subqueue(struct net_device * dev,u16 queue_index)1300 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1301 {
1302 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1303 #ifdef CONFIG_NETPOLL_TRAP
1304 if (netpoll_trap())
1305 return;
1306 #endif
1307 set_bit(__QUEUE_STATE_XOFF, &txq->state);
1308 }
1309
1310 /**
1311 * netif_subqueue_stopped - test status of subqueue
1312 * @dev: network device
1313 * @queue_index: sub queue index
1314 *
1315 * Check individual transmit queue of a device with multiple transmit queues.
1316 */
__netif_subqueue_stopped(const struct net_device * dev,u16 queue_index)1317 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1318 u16 queue_index)
1319 {
1320 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1321 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
1322 }
1323
netif_subqueue_stopped(const struct net_device * dev,struct sk_buff * skb)1324 static inline int netif_subqueue_stopped(const struct net_device *dev,
1325 struct sk_buff *skb)
1326 {
1327 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1328 }
1329
1330 /**
1331 * netif_wake_subqueue - allow sending packets on subqueue
1332 * @dev: network device
1333 * @queue_index: sub queue index
1334 *
1335 * Resume individual transmit queue of a device with multiple transmit queues.
1336 */
netif_wake_subqueue(struct net_device * dev,u16 queue_index)1337 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1338 {
1339 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1340 #ifdef CONFIG_NETPOLL_TRAP
1341 if (netpoll_trap())
1342 return;
1343 #endif
1344 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1345 __netif_schedule(txq->qdisc);
1346 }
1347
1348 /**
1349 * netif_is_multiqueue - test if device has multiple transmit queues
1350 * @dev: network device
1351 *
1352 * Check if device has multiple transmit queues
1353 */
netif_is_multiqueue(const struct net_device * dev)1354 static inline int netif_is_multiqueue(const struct net_device *dev)
1355 {
1356 return (dev->num_tx_queues > 1);
1357 }
1358
1359 /* Use this variant when it is known for sure that it
1360 * is executing from hardware interrupt context or with hardware interrupts
1361 * disabled.
1362 */
1363 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1364
1365 /* Use this variant in places where it could be invoked
1366 * from either hardware interrupt or other context, with hardware interrupts
1367 * either disabled or enabled.
1368 */
1369 extern void dev_kfree_skb_any(struct sk_buff *skb);
1370
1371 #define HAVE_NETIF_RX 1
1372 extern int netif_rx(struct sk_buff *skb);
1373 extern int netif_rx_ni(struct sk_buff *skb);
1374 #define HAVE_NETIF_RECEIVE_SKB 1
1375 extern int netif_receive_skb(struct sk_buff *skb);
1376 extern void napi_gro_flush(struct napi_struct *napi);
1377 extern int dev_gro_receive(struct napi_struct *napi,
1378 struct sk_buff *skb);
1379 extern int napi_gro_receive(struct napi_struct *napi,
1380 struct sk_buff *skb);
1381 extern void napi_reuse_skb(struct napi_struct *napi,
1382 struct sk_buff *skb);
1383 extern struct sk_buff * napi_fraginfo_skb(struct napi_struct *napi,
1384 struct napi_gro_fraginfo *info);
1385 extern int napi_gro_frags(struct napi_struct *napi,
1386 struct napi_gro_fraginfo *info);
1387 extern void netif_nit_deliver(struct sk_buff *skb);
1388 extern int dev_valid_name(const char *name);
1389 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1390 extern int dev_ethtool(struct net *net, struct ifreq *);
1391 extern unsigned dev_get_flags(const struct net_device *);
1392 extern int dev_change_flags(struct net_device *, unsigned);
1393 extern int dev_change_name(struct net_device *, const char *);
1394 extern int dev_set_alias(struct net_device *, const char *, size_t);
1395 extern int dev_change_net_namespace(struct net_device *,
1396 struct net *, const char *);
1397 extern int dev_set_mtu(struct net_device *, int);
1398 extern int dev_set_mac_address(struct net_device *,
1399 struct sockaddr *);
1400 extern int dev_hard_start_xmit(struct sk_buff *skb,
1401 struct net_device *dev,
1402 struct netdev_queue *txq);
1403
1404 extern int netdev_budget;
1405
1406 /* Called by rtnetlink.c:rtnl_unlock() */
1407 extern void netdev_run_todo(void);
1408
1409 /**
1410 * dev_put - release reference to device
1411 * @dev: network device
1412 *
1413 * Release reference to device to allow it to be freed.
1414 */
dev_put(struct net_device * dev)1415 static inline void dev_put(struct net_device *dev)
1416 {
1417 atomic_dec(&dev->refcnt);
1418 }
1419
1420 /**
1421 * dev_hold - get reference to device
1422 * @dev: network device
1423 *
1424 * Hold reference to device to keep it from being freed.
1425 */
dev_hold(struct net_device * dev)1426 static inline void dev_hold(struct net_device *dev)
1427 {
1428 atomic_inc(&dev->refcnt);
1429 }
1430
1431 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1432 * and _off may be called from IRQ context, but it is caller
1433 * who is responsible for serialization of these calls.
1434 *
1435 * The name carrier is inappropriate, these functions should really be
1436 * called netif_lowerlayer_*() because they represent the state of any
1437 * kind of lower layer not just hardware media.
1438 */
1439
1440 extern void linkwatch_fire_event(struct net_device *dev);
1441
1442 /**
1443 * netif_carrier_ok - test if carrier present
1444 * @dev: network device
1445 *
1446 * Check if carrier is present on device
1447 */
netif_carrier_ok(const struct net_device * dev)1448 static inline int netif_carrier_ok(const struct net_device *dev)
1449 {
1450 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1451 }
1452
1453 extern void __netdev_watchdog_up(struct net_device *dev);
1454
1455 extern void netif_carrier_on(struct net_device *dev);
1456
1457 extern void netif_carrier_off(struct net_device *dev);
1458
1459 /**
1460 * netif_dormant_on - mark device as dormant.
1461 * @dev: network device
1462 *
1463 * Mark device as dormant (as per RFC2863).
1464 *
1465 * The dormant state indicates that the relevant interface is not
1466 * actually in a condition to pass packets (i.e., it is not 'up') but is
1467 * in a "pending" state, waiting for some external event. For "on-
1468 * demand" interfaces, this new state identifies the situation where the
1469 * interface is waiting for events to place it in the up state.
1470 *
1471 */
netif_dormant_on(struct net_device * dev)1472 static inline void netif_dormant_on(struct net_device *dev)
1473 {
1474 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1475 linkwatch_fire_event(dev);
1476 }
1477
1478 /**
1479 * netif_dormant_off - set device as not dormant.
1480 * @dev: network device
1481 *
1482 * Device is not in dormant state.
1483 */
netif_dormant_off(struct net_device * dev)1484 static inline void netif_dormant_off(struct net_device *dev)
1485 {
1486 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1487 linkwatch_fire_event(dev);
1488 }
1489
1490 /**
1491 * netif_dormant - test if carrier present
1492 * @dev: network device
1493 *
1494 * Check if carrier is present on device
1495 */
netif_dormant(const struct net_device * dev)1496 static inline int netif_dormant(const struct net_device *dev)
1497 {
1498 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1499 }
1500
1501
1502 /**
1503 * netif_oper_up - test if device is operational
1504 * @dev: network device
1505 *
1506 * Check if carrier is operational
1507 */
netif_oper_up(const struct net_device * dev)1508 static inline int netif_oper_up(const struct net_device *dev) {
1509 return (dev->operstate == IF_OPER_UP ||
1510 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1511 }
1512
1513 /**
1514 * netif_device_present - is device available or removed
1515 * @dev: network device
1516 *
1517 * Check if device has not been removed from system.
1518 */
netif_device_present(struct net_device * dev)1519 static inline int netif_device_present(struct net_device *dev)
1520 {
1521 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1522 }
1523
1524 extern void netif_device_detach(struct net_device *dev);
1525
1526 extern void netif_device_attach(struct net_device *dev);
1527
1528 /*
1529 * Network interface message level settings
1530 */
1531 #define HAVE_NETIF_MSG 1
1532
1533 enum {
1534 NETIF_MSG_DRV = 0x0001,
1535 NETIF_MSG_PROBE = 0x0002,
1536 NETIF_MSG_LINK = 0x0004,
1537 NETIF_MSG_TIMER = 0x0008,
1538 NETIF_MSG_IFDOWN = 0x0010,
1539 NETIF_MSG_IFUP = 0x0020,
1540 NETIF_MSG_RX_ERR = 0x0040,
1541 NETIF_MSG_TX_ERR = 0x0080,
1542 NETIF_MSG_TX_QUEUED = 0x0100,
1543 NETIF_MSG_INTR = 0x0200,
1544 NETIF_MSG_TX_DONE = 0x0400,
1545 NETIF_MSG_RX_STATUS = 0x0800,
1546 NETIF_MSG_PKTDATA = 0x1000,
1547 NETIF_MSG_HW = 0x2000,
1548 NETIF_MSG_WOL = 0x4000,
1549 };
1550
1551 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1552 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1553 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1554 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1555 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1556 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1557 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1558 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1559 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1560 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1561 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1562 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1563 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1564 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1565 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1566
netif_msg_init(int debug_value,int default_msg_enable_bits)1567 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1568 {
1569 /* use default */
1570 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1571 return default_msg_enable_bits;
1572 if (debug_value == 0) /* no output */
1573 return 0;
1574 /* set low N bits */
1575 return (1 << debug_value) - 1;
1576 }
1577
1578 /* Test if receive needs to be scheduled but only if up */
netif_rx_schedule_prep(struct napi_struct * napi)1579 static inline int netif_rx_schedule_prep(struct napi_struct *napi)
1580 {
1581 return napi_schedule_prep(napi);
1582 }
1583
1584 /* Add interface to tail of rx poll list. This assumes that _prep has
1585 * already been called and returned 1.
1586 */
__netif_rx_schedule(struct napi_struct * napi)1587 static inline void __netif_rx_schedule(struct napi_struct *napi)
1588 {
1589 __napi_schedule(napi);
1590 }
1591
1592 /* Try to reschedule poll. Called by irq handler. */
1593
netif_rx_schedule(struct napi_struct * napi)1594 static inline void netif_rx_schedule(struct napi_struct *napi)
1595 {
1596 if (netif_rx_schedule_prep(napi))
1597 __netif_rx_schedule(napi);
1598 }
1599
1600 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
netif_rx_reschedule(struct napi_struct * napi)1601 static inline int netif_rx_reschedule(struct napi_struct *napi)
1602 {
1603 if (napi_schedule_prep(napi)) {
1604 __netif_rx_schedule(napi);
1605 return 1;
1606 }
1607 return 0;
1608 }
1609
1610 /* same as netif_rx_complete, except that local_irq_save(flags)
1611 * has already been issued
1612 */
__netif_rx_complete(struct napi_struct * napi)1613 static inline void __netif_rx_complete(struct napi_struct *napi)
1614 {
1615 __napi_complete(napi);
1616 }
1617
1618 /* Remove interface from poll list: it must be in the poll list
1619 * on current cpu. This primitive is called by dev->poll(), when
1620 * it completes the work. The device cannot be out of poll list at this
1621 * moment, it is BUG().
1622 */
netif_rx_complete(struct napi_struct * napi)1623 static inline void netif_rx_complete(struct napi_struct *napi)
1624 {
1625 napi_complete(napi);
1626 }
1627
__netif_tx_lock(struct netdev_queue * txq,int cpu)1628 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1629 {
1630 spin_lock(&txq->_xmit_lock);
1631 txq->xmit_lock_owner = cpu;
1632 }
1633
__netif_tx_lock_bh(struct netdev_queue * txq)1634 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1635 {
1636 spin_lock_bh(&txq->_xmit_lock);
1637 txq->xmit_lock_owner = smp_processor_id();
1638 }
1639
__netif_tx_trylock(struct netdev_queue * txq)1640 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1641 {
1642 int ok = spin_trylock(&txq->_xmit_lock);
1643 if (likely(ok))
1644 txq->xmit_lock_owner = smp_processor_id();
1645 return ok;
1646 }
1647
__netif_tx_unlock(struct netdev_queue * txq)1648 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1649 {
1650 txq->xmit_lock_owner = -1;
1651 spin_unlock(&txq->_xmit_lock);
1652 }
1653
__netif_tx_unlock_bh(struct netdev_queue * txq)1654 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1655 {
1656 txq->xmit_lock_owner = -1;
1657 spin_unlock_bh(&txq->_xmit_lock);
1658 }
1659
1660 /**
1661 * netif_tx_lock - grab network device transmit lock
1662 * @dev: network device
1663 *
1664 * Get network device transmit lock
1665 */
netif_tx_lock(struct net_device * dev)1666 static inline void netif_tx_lock(struct net_device *dev)
1667 {
1668 unsigned int i;
1669 int cpu;
1670
1671 spin_lock(&dev->tx_global_lock);
1672 cpu = smp_processor_id();
1673 for (i = 0; i < dev->num_tx_queues; i++) {
1674 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1675
1676 /* We are the only thread of execution doing a
1677 * freeze, but we have to grab the _xmit_lock in
1678 * order to synchronize with threads which are in
1679 * the ->hard_start_xmit() handler and already
1680 * checked the frozen bit.
1681 */
1682 __netif_tx_lock(txq, cpu);
1683 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1684 __netif_tx_unlock(txq);
1685 }
1686 }
1687
netif_tx_lock_bh(struct net_device * dev)1688 static inline void netif_tx_lock_bh(struct net_device *dev)
1689 {
1690 local_bh_disable();
1691 netif_tx_lock(dev);
1692 }
1693
netif_tx_unlock(struct net_device * dev)1694 static inline void netif_tx_unlock(struct net_device *dev)
1695 {
1696 unsigned int i;
1697
1698 for (i = 0; i < dev->num_tx_queues; i++) {
1699 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1700
1701 /* No need to grab the _xmit_lock here. If the
1702 * queue is not stopped for another reason, we
1703 * force a schedule.
1704 */
1705 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1706 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1707 __netif_schedule(txq->qdisc);
1708 }
1709 spin_unlock(&dev->tx_global_lock);
1710 }
1711
netif_tx_unlock_bh(struct net_device * dev)1712 static inline void netif_tx_unlock_bh(struct net_device *dev)
1713 {
1714 netif_tx_unlock(dev);
1715 local_bh_enable();
1716 }
1717
1718 #define HARD_TX_LOCK(dev, txq, cpu) { \
1719 if ((dev->features & NETIF_F_LLTX) == 0) { \
1720 __netif_tx_lock(txq, cpu); \
1721 } \
1722 }
1723
1724 #define HARD_TX_UNLOCK(dev, txq) { \
1725 if ((dev->features & NETIF_F_LLTX) == 0) { \
1726 __netif_tx_unlock(txq); \
1727 } \
1728 }
1729
netif_tx_disable(struct net_device * dev)1730 static inline void netif_tx_disable(struct net_device *dev)
1731 {
1732 unsigned int i;
1733 int cpu;
1734
1735 local_bh_disable();
1736 cpu = smp_processor_id();
1737 for (i = 0; i < dev->num_tx_queues; i++) {
1738 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1739
1740 __netif_tx_lock(txq, cpu);
1741 netif_tx_stop_queue(txq);
1742 __netif_tx_unlock(txq);
1743 }
1744 local_bh_enable();
1745 }
1746
netif_addr_lock(struct net_device * dev)1747 static inline void netif_addr_lock(struct net_device *dev)
1748 {
1749 spin_lock(&dev->addr_list_lock);
1750 }
1751
netif_addr_lock_bh(struct net_device * dev)1752 static inline void netif_addr_lock_bh(struct net_device *dev)
1753 {
1754 spin_lock_bh(&dev->addr_list_lock);
1755 }
1756
netif_addr_unlock(struct net_device * dev)1757 static inline void netif_addr_unlock(struct net_device *dev)
1758 {
1759 spin_unlock(&dev->addr_list_lock);
1760 }
1761
netif_addr_unlock_bh(struct net_device * dev)1762 static inline void netif_addr_unlock_bh(struct net_device *dev)
1763 {
1764 spin_unlock_bh(&dev->addr_list_lock);
1765 }
1766
1767 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1768
1769 extern void ether_setup(struct net_device *dev);
1770
1771 /* Support for loadable net-drivers */
1772 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1773 void (*setup)(struct net_device *),
1774 unsigned int queue_count);
1775 #define alloc_netdev(sizeof_priv, name, setup) \
1776 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1777 extern int register_netdev(struct net_device *dev);
1778 extern void unregister_netdev(struct net_device *dev);
1779 /* Functions used for secondary unicast and multicast support */
1780 extern void dev_set_rx_mode(struct net_device *dev);
1781 extern void __dev_set_rx_mode(struct net_device *dev);
1782 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1783 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1784 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1785 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1786 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1787 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1788 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1789 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1790 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1791 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1792 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1793 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1794 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1795 extern int dev_set_allmulti(struct net_device *dev, int inc);
1796 extern void netdev_state_change(struct net_device *dev);
1797 extern void netdev_bonding_change(struct net_device *dev);
1798 extern void netdev_features_change(struct net_device *dev);
1799 /* Load a device via the kmod */
1800 extern void dev_load(struct net *net, const char *name);
1801 extern void dev_mcast_init(void);
1802 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1803
1804 extern int netdev_max_backlog;
1805 extern int weight_p;
1806 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1807 extern int skb_checksum_help(struct sk_buff *skb);
1808 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1809 #ifdef CONFIG_BUG
1810 extern void netdev_rx_csum_fault(struct net_device *dev);
1811 #else
netdev_rx_csum_fault(struct net_device * dev)1812 static inline void netdev_rx_csum_fault(struct net_device *dev)
1813 {
1814 }
1815 #endif
1816 /* rx skb timestamps */
1817 extern void net_enable_timestamp(void);
1818 extern void net_disable_timestamp(void);
1819
1820 #ifdef CONFIG_PROC_FS
1821 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1822 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1823 extern void dev_seq_stop(struct seq_file *seq, void *v);
1824 #endif
1825
1826 extern int netdev_class_create_file(struct class_attribute *class_attr);
1827 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1828
1829 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1830
1831 extern void linkwatch_run_queue(void);
1832
1833 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1834 unsigned long mask);
1835 unsigned long netdev_fix_features(unsigned long features, const char *name);
1836
net_gso_ok(int features,int gso_type)1837 static inline int net_gso_ok(int features, int gso_type)
1838 {
1839 int feature = gso_type << NETIF_F_GSO_SHIFT;
1840 return (features & feature) == feature;
1841 }
1842
skb_gso_ok(struct sk_buff * skb,int features)1843 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1844 {
1845 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1846 }
1847
netif_needs_gso(struct net_device * dev,struct sk_buff * skb)1848 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1849 {
1850 return skb_is_gso(skb) &&
1851 (!skb_gso_ok(skb, dev->features) ||
1852 (skb_shinfo(skb)->frag_list &&
1853 !(dev->features & NETIF_F_FRAGLIST)) ||
1854 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1855 }
1856
netif_set_gso_max_size(struct net_device * dev,unsigned int size)1857 static inline void netif_set_gso_max_size(struct net_device *dev,
1858 unsigned int size)
1859 {
1860 dev->gso_max_size = size;
1861 }
1862
1863 /* On bonding slaves other than the currently active slave, suppress
1864 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1865 * ARP on active-backup slaves with arp_validate enabled.
1866 */
skb_bond_should_drop(struct sk_buff * skb)1867 static inline int skb_bond_should_drop(struct sk_buff *skb)
1868 {
1869 struct net_device *dev = skb->dev;
1870 struct net_device *master = dev->master;
1871
1872 if (master) {
1873 if (master->priv_flags & IFF_MASTER_ARPMON)
1874 dev->last_rx = jiffies;
1875
1876 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
1877 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1878 skb->protocol == __constant_htons(ETH_P_ARP))
1879 return 0;
1880
1881 if (master->priv_flags & IFF_MASTER_ALB) {
1882 if (skb->pkt_type != PACKET_BROADCAST &&
1883 skb->pkt_type != PACKET_MULTICAST)
1884 return 0;
1885 }
1886 if (master->priv_flags & IFF_MASTER_8023AD &&
1887 skb->protocol == __constant_htons(ETH_P_SLOW))
1888 return 0;
1889
1890 return 1;
1891 }
1892 }
1893 return 0;
1894 }
1895
1896 extern struct pernet_operations __net_initdata loopback_net_ops;
1897 #endif /* __KERNEL__ */
1898
1899 #endif /* _LINUX_DEV_H */
1900