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1 | /* | |
2 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
3 | * operating system. INET is implemented using the BSD Socket | |
4 | * interface as the means of communication with the user level. | |
5 | * | |
6 | * Definitions for the Interfaces handler. | |
7 | * | |
8 | * Version: @(#)dev.h 1.0.10 08/12/93 | |
9 | * | |
10 | * Authors: Ross Biro | |
11 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> | |
12 | * Corey Minyard <wf-rch!minyard@relay.EU.net> | |
13 | * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov> | |
14 | * Alan Cox, <alan@lxorguk.ukuu.org.uk> | |
15 | * Bjorn Ekwall. <bj0rn@blox.se> | |
16 | * Pekka Riikonen <priikone@poseidon.pspt.fi> | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or | |
19 | * modify it under the terms of the GNU General Public License | |
20 | * as published by the Free Software Foundation; either version | |
21 | * 2 of the License, or (at your option) any later version. | |
22 | * | |
23 | * Moved to /usr/include/linux for NET3 | |
24 | */ | |
25 | #ifndef _LINUX_NETDEVICE_H | |
26 | #define _LINUX_NETDEVICE_H | |
27 | ||
28 | #include <linux/if.h> | |
29 | #include <linux/if_ether.h> | |
30 | #include <linux/if_packet.h> | |
31 | ||
32 | #ifdef __KERNEL__ | |
33 | #include <linux/timer.h> | |
34 | #include <linux/delay.h> | |
35 | #include <linux/mm.h> | |
36 | #include <asm/atomic.h> | |
37 | #include <asm/cache.h> | |
38 | #include <asm/byteorder.h> | |
39 | ||
40 | #include <linux/device.h> | |
41 | #include <linux/percpu.h> | |
42 | #include <linux/rculist.h> | |
43 | #include <linux/dmaengine.h> | |
44 | #include <linux/workqueue.h> | |
45 | ||
46 | #include <linux/ethtool.h> | |
47 | #include <net/net_namespace.h> | |
48 | #include <net/dsa.h> | |
49 | #ifdef CONFIG_DCB | |
50 | #include <net/dcbnl.h> | |
51 | #endif | |
52 | ||
53 | struct vlan_group; | |
54 | struct netpoll_info; | |
55 | /* 802.11 specific */ | |
56 | struct wireless_dev; | |
57 | /* source back-compat hooks */ | |
58 | #define SET_ETHTOOL_OPS(netdev,ops) \ | |
59 | ( (netdev)->ethtool_ops = (ops) ) | |
60 | ||
61 | #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev | |
62 | functions are available. */ | |
63 | #define HAVE_FREE_NETDEV /* free_netdev() */ | |
64 | #define HAVE_NETDEV_PRIV /* netdev_priv() */ | |
65 | ||
66 | #define NET_XMIT_SUCCESS 0 | |
67 | #define NET_XMIT_DROP 1 /* skb dropped */ | |
68 | #define NET_XMIT_CN 2 /* congestion notification */ | |
69 | #define NET_XMIT_POLICED 3 /* skb is shot by police */ | |
70 | #define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */ | |
71 | ||
72 | /* Backlog congestion levels */ | |
73 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
74 | #define NET_RX_DROP 1 /* packet dropped */ | |
75 | ||
76 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It | |
77 | * indicates that the device will soon be dropping packets, or already drops | |
78 | * some packets of the same priority; prompting us to send less aggressively. */ | |
79 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e)) | |
80 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) | |
81 | ||
82 | #endif | |
83 | ||
84 | #define MAX_ADDR_LEN 32 /* Largest hardware address length */ | |
85 | ||
86 | /* Driver transmit return codes */ | |
87 | #define NETDEV_TX_OK 0 /* driver took care of packet */ | |
88 | #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/ | |
89 | #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */ | |
90 | ||
91 | #ifdef __KERNEL__ | |
92 | ||
93 | /* | |
94 | * Compute the worst case header length according to the protocols | |
95 | * used. | |
96 | */ | |
97 | ||
98 | #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) | |
99 | # if defined(CONFIG_MAC80211_MESH) | |
100 | # define LL_MAX_HEADER 128 | |
101 | # else | |
102 | # define LL_MAX_HEADER 96 | |
103 | # endif | |
104 | #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE) | |
105 | # define LL_MAX_HEADER 48 | |
106 | #else | |
107 | # define LL_MAX_HEADER 32 | |
108 | #endif | |
109 | ||
110 | #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \ | |
111 | !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \ | |
112 | !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \ | |
113 | !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE) | |
114 | #define MAX_HEADER LL_MAX_HEADER | |
115 | #else | |
116 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
117 | #endif | |
118 | ||
119 | #endif /* __KERNEL__ */ | |
120 | ||
121 | /* | |
122 | * Network device statistics. Akin to the 2.0 ether stats but | |
123 | * with byte counters. | |
124 | */ | |
125 | ||
126 | struct net_device_stats | |
127 | { | |
128 | unsigned long rx_packets; /* total packets received */ | |
129 | unsigned long tx_packets; /* total packets transmitted */ | |
130 | unsigned long rx_bytes; /* total bytes received */ | |
131 | unsigned long tx_bytes; /* total bytes transmitted */ | |
132 | unsigned long rx_errors; /* bad packets received */ | |
133 | unsigned long tx_errors; /* packet transmit problems */ | |
134 | unsigned long rx_dropped; /* no space in linux buffers */ | |
135 | unsigned long tx_dropped; /* no space available in linux */ | |
136 | unsigned long multicast; /* multicast packets received */ | |
137 | unsigned long collisions; | |
138 | ||
139 | /* detailed rx_errors: */ | |
140 | unsigned long rx_length_errors; | |
141 | unsigned long rx_over_errors; /* receiver ring buff overflow */ | |
142 | unsigned long rx_crc_errors; /* recved pkt with crc error */ | |
143 | unsigned long rx_frame_errors; /* recv'd frame alignment error */ | |
144 | unsigned long rx_fifo_errors; /* recv'r fifo overrun */ | |
145 | unsigned long rx_missed_errors; /* receiver missed packet */ | |
146 | ||
147 | /* detailed tx_errors */ | |
148 | unsigned long tx_aborted_errors; | |
149 | unsigned long tx_carrier_errors; | |
150 | unsigned long tx_fifo_errors; | |
151 | unsigned long tx_heartbeat_errors; | |
152 | unsigned long tx_window_errors; | |
153 | ||
154 | /* for cslip etc */ | |
155 | unsigned long rx_compressed; | |
156 | unsigned long tx_compressed; | |
157 | }; | |
158 | ||
159 | ||
160 | /* Media selection options. */ | |
161 | enum { | |
162 | IF_PORT_UNKNOWN = 0, | |
163 | IF_PORT_10BASE2, | |
164 | IF_PORT_10BASET, | |
165 | IF_PORT_AUI, | |
166 | IF_PORT_100BASET, | |
167 | IF_PORT_100BASETX, | |
168 | IF_PORT_100BASEFX | |
169 | }; | |
170 | ||
171 | #ifdef __KERNEL__ | |
172 | ||
173 | #include <linux/cache.h> | |
174 | #include <linux/skbuff.h> | |
175 | ||
176 | struct neighbour; | |
177 | struct neigh_parms; | |
178 | struct sk_buff; | |
179 | ||
180 | struct netif_rx_stats | |
181 | { | |
182 | unsigned total; | |
183 | unsigned dropped; | |
184 | unsigned time_squeeze; | |
185 | unsigned cpu_collision; | |
186 | }; | |
187 | ||
188 | DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); | |
189 | ||
190 | struct dev_addr_list | |
191 | { | |
192 | struct dev_addr_list *next; | |
193 | u8 da_addr[MAX_ADDR_LEN]; | |
194 | u8 da_addrlen; | |
195 | u8 da_synced; | |
196 | int da_users; | |
197 | int da_gusers; | |
198 | }; | |
199 | ||
200 | /* | |
201 | * We tag multicasts with these structures. | |
202 | */ | |
203 | ||
204 | #define dev_mc_list dev_addr_list | |
205 | #define dmi_addr da_addr | |
206 | #define dmi_addrlen da_addrlen | |
207 | #define dmi_users da_users | |
208 | #define dmi_gusers da_gusers | |
209 | ||
210 | struct netdev_hw_addr { | |
211 | struct list_head list; | |
212 | unsigned char addr[MAX_ADDR_LEN]; | |
213 | unsigned char type; | |
214 | #define NETDEV_HW_ADDR_T_LAN 1 | |
215 | #define NETDEV_HW_ADDR_T_SAN 2 | |
216 | #define NETDEV_HW_ADDR_T_SLAVE 3 | |
217 | #define NETDEV_HW_ADDR_T_UNICAST 4 | |
218 | int refcount; | |
219 | bool synced; | |
220 | struct rcu_head rcu_head; | |
221 | }; | |
222 | ||
223 | struct netdev_hw_addr_list { | |
224 | struct list_head list; | |
225 | int count; | |
226 | }; | |
227 | ||
228 | struct hh_cache | |
229 | { | |
230 | struct hh_cache *hh_next; /* Next entry */ | |
231 | atomic_t hh_refcnt; /* number of users */ | |
232 | /* | |
233 | * We want hh_output, hh_len, hh_lock and hh_data be a in a separate | |
234 | * cache line on SMP. | |
235 | * They are mostly read, but hh_refcnt may be changed quite frequently, | |
236 | * incurring cache line ping pongs. | |
237 | */ | |
238 | __be16 hh_type ____cacheline_aligned_in_smp; | |
239 | /* protocol identifier, f.e ETH_P_IP | |
240 | * NOTE: For VLANs, this will be the | |
241 | * encapuslated type. --BLG | |
242 | */ | |
243 | u16 hh_len; /* length of header */ | |
244 | int (*hh_output)(struct sk_buff *skb); | |
245 | seqlock_t hh_lock; | |
246 | ||
247 | /* cached hardware header; allow for machine alignment needs. */ | |
248 | #define HH_DATA_MOD 16 | |
249 | #define HH_DATA_OFF(__len) \ | |
250 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) | |
251 | #define HH_DATA_ALIGN(__len) \ | |
252 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
253 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
254 | }; | |
255 | ||
256 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
257 | * Alternative is: | |
258 | * dev->hard_header_len ? (dev->hard_header_len + | |
259 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
260 | * | |
261 | * We could use other alignment values, but we must maintain the | |
262 | * relationship HH alignment <= LL alignment. | |
263 | * | |
264 | * LL_ALLOCATED_SPACE also takes into account the tailroom the device | |
265 | * may need. | |
266 | */ | |
267 | #define LL_RESERVED_SPACE(dev) \ | |
268 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
269 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ | |
270 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
271 | #define LL_ALLOCATED_SPACE(dev) \ | |
272 | ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
273 | ||
274 | struct header_ops { | |
275 | int (*create) (struct sk_buff *skb, struct net_device *dev, | |
276 | unsigned short type, const void *daddr, | |
277 | const void *saddr, unsigned len); | |
278 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); | |
279 | int (*rebuild)(struct sk_buff *skb); | |
280 | #define HAVE_HEADER_CACHE | |
281 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh); | |
282 | void (*cache_update)(struct hh_cache *hh, | |
283 | const struct net_device *dev, | |
284 | const unsigned char *haddr); | |
285 | }; | |
286 | ||
287 | /* These flag bits are private to the generic network queueing | |
288 | * layer, they may not be explicitly referenced by any other | |
289 | * code. | |
290 | */ | |
291 | ||
292 | enum netdev_state_t | |
293 | { | |
294 | __LINK_STATE_START, | |
295 | __LINK_STATE_PRESENT, | |
296 | __LINK_STATE_NOCARRIER, | |
297 | __LINK_STATE_LINKWATCH_PENDING, | |
298 | __LINK_STATE_DORMANT, | |
299 | }; | |
300 | ||
301 | ||
302 | /* | |
303 | * This structure holds at boot time configured netdevice settings. They | |
304 | * are then used in the device probing. | |
305 | */ | |
306 | struct netdev_boot_setup { | |
307 | char name[IFNAMSIZ]; | |
308 | struct ifmap map; | |
309 | }; | |
310 | #define NETDEV_BOOT_SETUP_MAX 8 | |
311 | ||
312 | extern int __init netdev_boot_setup(char *str); | |
313 | ||
314 | /* | |
315 | * Structure for NAPI scheduling similar to tasklet but with weighting | |
316 | */ | |
317 | struct napi_struct { | |
318 | /* The poll_list must only be managed by the entity which | |
319 | * changes the state of the NAPI_STATE_SCHED bit. This means | |
320 | * whoever atomically sets that bit can add this napi_struct | |
321 | * to the per-cpu poll_list, and whoever clears that bit | |
322 | * can remove from the list right before clearing the bit. | |
323 | */ | |
324 | struct list_head poll_list; | |
325 | ||
326 | unsigned long state; | |
327 | int weight; | |
328 | int (*poll)(struct napi_struct *, int); | |
329 | #ifdef CONFIG_NETPOLL | |
330 | spinlock_t poll_lock; | |
331 | int poll_owner; | |
332 | #endif | |
333 | ||
334 | unsigned int gro_count; | |
335 | ||
336 | struct net_device *dev; | |
337 | struct list_head dev_list; | |
338 | struct sk_buff *gro_list; | |
339 | struct sk_buff *skb; | |
340 | }; | |
341 | ||
342 | enum | |
343 | { | |
344 | NAPI_STATE_SCHED, /* Poll is scheduled */ | |
345 | NAPI_STATE_DISABLE, /* Disable pending */ | |
346 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ | |
347 | }; | |
348 | ||
349 | enum { | |
350 | GRO_MERGED, | |
351 | GRO_MERGED_FREE, | |
352 | GRO_HELD, | |
353 | GRO_NORMAL, | |
354 | GRO_DROP, | |
355 | }; | |
356 | ||
357 | extern void __napi_schedule(struct napi_struct *n); | |
358 | ||
359 | static inline int napi_disable_pending(struct napi_struct *n) | |
360 | { | |
361 | return test_bit(NAPI_STATE_DISABLE, &n->state); | |
362 | } | |
363 | ||
364 | /** | |
365 | * napi_schedule_prep - check if napi can be scheduled | |
366 | * @n: napi context | |
367 | * | |
368 | * Test if NAPI routine is already running, and if not mark | |
369 | * it as running. This is used as a condition variable | |
370 | * insure only one NAPI poll instance runs. We also make | |
371 | * sure there is no pending NAPI disable. | |
372 | */ | |
373 | static inline int napi_schedule_prep(struct napi_struct *n) | |
374 | { | |
375 | return !napi_disable_pending(n) && | |
376 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); | |
377 | } | |
378 | ||
379 | /** | |
380 | * napi_schedule - schedule NAPI poll | |
381 | * @n: napi context | |
382 | * | |
383 | * Schedule NAPI poll routine to be called if it is not already | |
384 | * running. | |
385 | */ | |
386 | static inline void napi_schedule(struct napi_struct *n) | |
387 | { | |
388 | if (napi_schedule_prep(n)) | |
389 | __napi_schedule(n); | |
390 | } | |
391 | ||
392 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ | |
393 | static inline int napi_reschedule(struct napi_struct *napi) | |
394 | { | |
395 | if (napi_schedule_prep(napi)) { | |
396 | __napi_schedule(napi); | |
397 | return 1; | |
398 | } | |
399 | return 0; | |
400 | } | |
401 | ||
402 | /** | |
403 | * napi_complete - NAPI processing complete | |
404 | * @n: napi context | |
405 | * | |
406 | * Mark NAPI processing as complete. | |
407 | */ | |
408 | extern void __napi_complete(struct napi_struct *n); | |
409 | extern void napi_complete(struct napi_struct *n); | |
410 | ||
411 | /** | |
412 | * napi_disable - prevent NAPI from scheduling | |
413 | * @n: napi context | |
414 | * | |
415 | * Stop NAPI from being scheduled on this context. | |
416 | * Waits till any outstanding processing completes. | |
417 | */ | |
418 | static inline void napi_disable(struct napi_struct *n) | |
419 | { | |
420 | set_bit(NAPI_STATE_DISABLE, &n->state); | |
421 | while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) | |
422 | msleep(1); | |
423 | clear_bit(NAPI_STATE_DISABLE, &n->state); | |
424 | } | |
425 | ||
426 | /** | |
427 | * napi_enable - enable NAPI scheduling | |
428 | * @n: napi context | |
429 | * | |
430 | * Resume NAPI from being scheduled on this context. | |
431 | * Must be paired with napi_disable. | |
432 | */ | |
433 | static inline void napi_enable(struct napi_struct *n) | |
434 | { | |
435 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
436 | smp_mb__before_clear_bit(); | |
437 | clear_bit(NAPI_STATE_SCHED, &n->state); | |
438 | } | |
439 | ||
440 | #ifdef CONFIG_SMP | |
441 | /** | |
442 | * napi_synchronize - wait until NAPI is not running | |
443 | * @n: napi context | |
444 | * | |
445 | * Wait until NAPI is done being scheduled on this context. | |
446 | * Waits till any outstanding processing completes but | |
447 | * does not disable future activations. | |
448 | */ | |
449 | static inline void napi_synchronize(const struct napi_struct *n) | |
450 | { | |
451 | while (test_bit(NAPI_STATE_SCHED, &n->state)) | |
452 | msleep(1); | |
453 | } | |
454 | #else | |
455 | # define napi_synchronize(n) barrier() | |
456 | #endif | |
457 | ||
458 | enum netdev_queue_state_t | |
459 | { | |
460 | __QUEUE_STATE_XOFF, | |
461 | __QUEUE_STATE_FROZEN, | |
462 | }; | |
463 | ||
464 | struct netdev_queue { | |
465 | /* | |
466 | * read mostly part | |
467 | */ | |
468 | struct net_device *dev; | |
469 | struct Qdisc *qdisc; | |
470 | unsigned long state; | |
471 | struct Qdisc *qdisc_sleeping; | |
472 | /* | |
473 | * write mostly part | |
474 | */ | |
475 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; | |
476 | int xmit_lock_owner; | |
477 | /* | |
478 | * please use this field instead of dev->trans_start | |
479 | */ | |
480 | unsigned long trans_start; | |
481 | unsigned long tx_bytes; | |
482 | unsigned long tx_packets; | |
483 | unsigned long tx_dropped; | |
484 | } ____cacheline_aligned_in_smp; | |
485 | ||
486 | ||
487 | /* | |
488 | * This structure defines the management hooks for network devices. | |
489 | * The following hooks can be defined; unless noted otherwise, they are | |
490 | * optional and can be filled with a null pointer. | |
491 | * | |
492 | * int (*ndo_init)(struct net_device *dev); | |
493 | * This function is called once when network device is registered. | |
494 | * The network device can use this to any late stage initializaton | |
495 | * or semantic validattion. It can fail with an error code which will | |
496 | * be propogated back to register_netdev | |
497 | * | |
498 | * void (*ndo_uninit)(struct net_device *dev); | |
499 | * This function is called when device is unregistered or when registration | |
500 | * fails. It is not called if init fails. | |
501 | * | |
502 | * int (*ndo_open)(struct net_device *dev); | |
503 | * This function is called when network device transistions to the up | |
504 | * state. | |
505 | * | |
506 | * int (*ndo_stop)(struct net_device *dev); | |
507 | * This function is called when network device transistions to the down | |
508 | * state. | |
509 | * | |
510 | * int (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev); | |
511 | * Called when a packet needs to be transmitted. | |
512 | * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED, | |
513 | * Required can not be NULL. | |
514 | * | |
515 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb); | |
516 | * Called to decide which queue to when device supports multiple | |
517 | * transmit queues. | |
518 | * | |
519 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); | |
520 | * This function is called to allow device receiver to make | |
521 | * changes to configuration when multicast or promiscious is enabled. | |
522 | * | |
523 | * void (*ndo_set_rx_mode)(struct net_device *dev); | |
524 | * This function is called device changes address list filtering. | |
525 | * | |
526 | * void (*ndo_set_multicast_list)(struct net_device *dev); | |
527 | * This function is called when the multicast address list changes. | |
528 | * | |
529 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); | |
530 | * This function is called when the Media Access Control address | |
531 | * needs to be changed. If this interface is not defined, the | |
532 | * mac address can not be changed. | |
533 | * | |
534 | * int (*ndo_validate_addr)(struct net_device *dev); | |
535 | * Test if Media Access Control address is valid for the device. | |
536 | * | |
537 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); | |
538 | * Called when a user request an ioctl which can't be handled by | |
539 | * the generic interface code. If not defined ioctl's return | |
540 | * not supported error code. | |
541 | * | |
542 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); | |
543 | * Used to set network devices bus interface parameters. This interface | |
544 | * is retained for legacy reason, new devices should use the bus | |
545 | * interface (PCI) for low level management. | |
546 | * | |
547 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); | |
548 | * Called when a user wants to change the Maximum Transfer Unit | |
549 | * of a device. If not defined, any request to change MTU will | |
550 | * will return an error. | |
551 | * | |
552 | * void (*ndo_tx_timeout)(struct net_device *dev); | |
553 | * Callback uses when the transmitter has not made any progress | |
554 | * for dev->watchdog ticks. | |
555 | * | |
556 | * struct net_device_stats* (*get_stats)(struct net_device *dev); | |
557 | * Called when a user wants to get the network device usage | |
558 | * statistics. If not defined, the counters in dev->stats will | |
559 | * be used. | |
560 | * | |
561 | * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp); | |
562 | * If device support VLAN receive accleration | |
563 | * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called | |
564 | * when vlan groups for the device changes. Note: grp is NULL | |
565 | * if no vlan's groups are being used. | |
566 | * | |
567 | * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid); | |
568 | * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) | |
569 | * this function is called when a VLAN id is registered. | |
570 | * | |
571 | * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); | |
572 | * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) | |
573 | * this function is called when a VLAN id is unregistered. | |
574 | * | |
575 | * void (*ndo_poll_controller)(struct net_device *dev); | |
576 | */ | |
577 | #define HAVE_NET_DEVICE_OPS | |
578 | struct net_device_ops { | |
579 | int (*ndo_init)(struct net_device *dev); | |
580 | void (*ndo_uninit)(struct net_device *dev); | |
581 | int (*ndo_open)(struct net_device *dev); | |
582 | int (*ndo_stop)(struct net_device *dev); | |
583 | int (*ndo_start_xmit) (struct sk_buff *skb, | |
584 | struct net_device *dev); | |
585 | u16 (*ndo_select_queue)(struct net_device *dev, | |
586 | struct sk_buff *skb); | |
587 | #define HAVE_CHANGE_RX_FLAGS | |
588 | void (*ndo_change_rx_flags)(struct net_device *dev, | |
589 | int flags); | |
590 | #define HAVE_SET_RX_MODE | |
591 | void (*ndo_set_rx_mode)(struct net_device *dev); | |
592 | #define HAVE_MULTICAST | |
593 | void (*ndo_set_multicast_list)(struct net_device *dev); | |
594 | #define HAVE_SET_MAC_ADDR | |
595 | int (*ndo_set_mac_address)(struct net_device *dev, | |
596 | void *addr); | |
597 | #define HAVE_VALIDATE_ADDR | |
598 | int (*ndo_validate_addr)(struct net_device *dev); | |
599 | #define HAVE_PRIVATE_IOCTL | |
600 | int (*ndo_do_ioctl)(struct net_device *dev, | |
601 | struct ifreq *ifr, int cmd); | |
602 | #define HAVE_SET_CONFIG | |
603 | int (*ndo_set_config)(struct net_device *dev, | |
604 | struct ifmap *map); | |
605 | #define HAVE_CHANGE_MTU | |
606 | int (*ndo_change_mtu)(struct net_device *dev, | |
607 | int new_mtu); | |
608 | int (*ndo_neigh_setup)(struct net_device *dev, | |
609 | struct neigh_parms *); | |
610 | #define HAVE_TX_TIMEOUT | |
611 | void (*ndo_tx_timeout) (struct net_device *dev); | |
612 | ||
613 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); | |
614 | ||
615 | void (*ndo_vlan_rx_register)(struct net_device *dev, | |
616 | struct vlan_group *grp); | |
617 | void (*ndo_vlan_rx_add_vid)(struct net_device *dev, | |
618 | unsigned short vid); | |
619 | void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, | |
620 | unsigned short vid); | |
621 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
622 | #define HAVE_NETDEV_POLL | |
623 | void (*ndo_poll_controller)(struct net_device *dev); | |
624 | #endif | |
625 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) | |
626 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, | |
627 | u16 xid, | |
628 | struct scatterlist *sgl, | |
629 | unsigned int sgc); | |
630 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, | |
631 | u16 xid); | |
632 | #endif | |
633 | }; | |
634 | ||
635 | /* | |
636 | * The DEVICE structure. | |
637 | * Actually, this whole structure is a big mistake. It mixes I/O | |
638 | * data with strictly "high-level" data, and it has to know about | |
639 | * almost every data structure used in the INET module. | |
640 | * | |
641 | * FIXME: cleanup struct net_device such that network protocol info | |
642 | * moves out. | |
643 | */ | |
644 | ||
645 | struct net_device | |
646 | { | |
647 | ||
648 | /* | |
649 | * This is the first field of the "visible" part of this structure | |
650 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
651 | * the interface. | |
652 | */ | |
653 | char name[IFNAMSIZ]; | |
654 | /* device name hash chain */ | |
655 | struct hlist_node name_hlist; | |
656 | /* snmp alias */ | |
657 | char *ifalias; | |
658 | ||
659 | /* | |
660 | * I/O specific fields | |
661 | * FIXME: Merge these and struct ifmap into one | |
662 | */ | |
663 | unsigned long mem_end; /* shared mem end */ | |
664 | unsigned long mem_start; /* shared mem start */ | |
665 | unsigned long base_addr; /* device I/O address */ | |
666 | unsigned int irq; /* device IRQ number */ | |
667 | ||
668 | /* | |
669 | * Some hardware also needs these fields, but they are not | |
670 | * part of the usual set specified in Space.c. | |
671 | */ | |
672 | ||
673 | unsigned char if_port; /* Selectable AUI, TP,..*/ | |
674 | unsigned char dma; /* DMA channel */ | |
675 | ||
676 | unsigned long state; | |
677 | ||
678 | struct list_head dev_list; | |
679 | struct list_head napi_list; | |
680 | ||
681 | /* Net device features */ | |
682 | unsigned long features; | |
683 | #define NETIF_F_SG 1 /* Scatter/gather IO. */ | |
684 | #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ | |
685 | #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ | |
686 | #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ | |
687 | #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ | |
688 | #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ | |
689 | #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ | |
690 | #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ | |
691 | #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ | |
692 | #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ | |
693 | #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ | |
694 | #define NETIF_F_GSO 2048 /* Enable software GSO. */ | |
695 | #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ | |
696 | /* do not use LLTX in new drivers */ | |
697 | #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ | |
698 | #define NETIF_F_GRO 16384 /* Generic receive offload */ | |
699 | #define NETIF_F_LRO 32768 /* large receive offload */ | |
700 | ||
701 | /* the GSO_MASK reserves bits 16 through 23 */ | |
702 | #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */ | |
703 | #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */ | |
704 | ||
705 | /* Segmentation offload features */ | |
706 | #define NETIF_F_GSO_SHIFT 16 | |
707 | #define NETIF_F_GSO_MASK 0x00ff0000 | |
708 | #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) | |
709 | #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) | |
710 | #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) | |
711 | #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) | |
712 | #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) | |
713 | #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT) | |
714 | ||
715 | /* List of features with software fallbacks. */ | |
716 | #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) | |
717 | ||
718 | ||
719 | #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) | |
720 | #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) | |
721 | #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) | |
722 | #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) | |
723 | ||
724 | /* | |
725 | * If one device supports one of these features, then enable them | |
726 | * for all in netdev_increment_features. | |
727 | */ | |
728 | #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \ | |
729 | NETIF_F_SG | NETIF_F_HIGHDMA | \ | |
730 | NETIF_F_FRAGLIST) | |
731 | ||
732 | /* Interface index. Unique device identifier */ | |
733 | int ifindex; | |
734 | int iflink; | |
735 | ||
736 | struct net_device_stats stats; | |
737 | ||
738 | #ifdef CONFIG_WIRELESS_EXT | |
739 | /* List of functions to handle Wireless Extensions (instead of ioctl). | |
740 | * See <net/iw_handler.h> for details. Jean II */ | |
741 | const struct iw_handler_def * wireless_handlers; | |
742 | /* Instance data managed by the core of Wireless Extensions. */ | |
743 | struct iw_public_data * wireless_data; | |
744 | #endif | |
745 | /* Management operations */ | |
746 | const struct net_device_ops *netdev_ops; | |
747 | const struct ethtool_ops *ethtool_ops; | |
748 | ||
749 | /* Hardware header description */ | |
750 | const struct header_ops *header_ops; | |
751 | ||
752 | unsigned int flags; /* interface flags (a la BSD) */ | |
753 | unsigned short gflags; | |
754 | unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ | |
755 | unsigned short padded; /* How much padding added by alloc_netdev() */ | |
756 | ||
757 | unsigned char operstate; /* RFC2863 operstate */ | |
758 | unsigned char link_mode; /* mapping policy to operstate */ | |
759 | ||
760 | unsigned mtu; /* interface MTU value */ | |
761 | unsigned short type; /* interface hardware type */ | |
762 | unsigned short hard_header_len; /* hardware hdr length */ | |
763 | ||
764 | /* extra head- and tailroom the hardware may need, but not in all cases | |
765 | * can this be guaranteed, especially tailroom. Some cases also use | |
766 | * LL_MAX_HEADER instead to allocate the skb. | |
767 | */ | |
768 | unsigned short needed_headroom; | |
769 | unsigned short needed_tailroom; | |
770 | ||
771 | struct net_device *master; /* Pointer to master device of a group, | |
772 | * which this device is member of. | |
773 | */ | |
774 | ||
775 | /* Interface address info. */ | |
776 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ | |
777 | unsigned char addr_len; /* hardware address length */ | |
778 | unsigned short dev_id; /* for shared network cards */ | |
779 | ||
780 | struct netdev_hw_addr_list uc; /* Secondary unicast | |
781 | mac addresses */ | |
782 | int uc_promisc; | |
783 | spinlock_t addr_list_lock; | |
784 | struct dev_addr_list *mc_list; /* Multicast mac addresses */ | |
785 | int mc_count; /* Number of installed mcasts */ | |
786 | unsigned int promiscuity; | |
787 | unsigned int allmulti; | |
788 | ||
789 | ||
790 | /* Protocol specific pointers */ | |
791 | ||
792 | #ifdef CONFIG_NET_DSA | |
793 | void *dsa_ptr; /* dsa specific data */ | |
794 | #endif | |
795 | void *atalk_ptr; /* AppleTalk link */ | |
796 | void *ip_ptr; /* IPv4 specific data */ | |
797 | void *dn_ptr; /* DECnet specific data */ | |
798 | void *ip6_ptr; /* IPv6 specific data */ | |
799 | void *ec_ptr; /* Econet specific data */ | |
800 | void *ax25_ptr; /* AX.25 specific data */ | |
801 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, | |
802 | assign before registering */ | |
803 | ||
804 | /* | |
805 | * Cache line mostly used on receive path (including eth_type_trans()) | |
806 | */ | |
807 | unsigned long last_rx; /* Time of last Rx */ | |
808 | /* Interface address info used in eth_type_trans() */ | |
809 | unsigned char *dev_addr; /* hw address, (before bcast | |
810 | because most packets are | |
811 | unicast) */ | |
812 | ||
813 | struct netdev_hw_addr_list dev_addrs; /* list of device | |
814 | hw addresses */ | |
815 | ||
816 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ | |
817 | ||
818 | struct netdev_queue rx_queue; | |
819 | ||
820 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; | |
821 | ||
822 | /* Number of TX queues allocated at alloc_netdev_mq() time */ | |
823 | unsigned int num_tx_queues; | |
824 | ||
825 | /* Number of TX queues currently active in device */ | |
826 | unsigned int real_num_tx_queues; | |
827 | ||
828 | unsigned long tx_queue_len; /* Max frames per queue allowed */ | |
829 | spinlock_t tx_global_lock; | |
830 | /* | |
831 | * One part is mostly used on xmit path (device) | |
832 | */ | |
833 | /* These may be needed for future network-power-down code. */ | |
834 | ||
835 | /* | |
836 | * trans_start here is expensive for high speed devices on SMP, | |
837 | * please use netdev_queue->trans_start instead. | |
838 | */ | |
839 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ | |
840 | ||
841 | int watchdog_timeo; /* used by dev_watchdog() */ | |
842 | struct timer_list watchdog_timer; | |
843 | ||
844 | /* Number of references to this device */ | |
845 | atomic_t refcnt ____cacheline_aligned_in_smp; | |
846 | ||
847 | /* delayed register/unregister */ | |
848 | struct list_head todo_list; | |
849 | /* device index hash chain */ | |
850 | struct hlist_node index_hlist; | |
851 | ||
852 | struct net_device *link_watch_next; | |
853 | ||
854 | /* register/unregister state machine */ | |
855 | enum { NETREG_UNINITIALIZED=0, | |
856 | NETREG_REGISTERED, /* completed register_netdevice */ | |
857 | NETREG_UNREGISTERING, /* called unregister_netdevice */ | |
858 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
859 | NETREG_RELEASED, /* called free_netdev */ | |
860 | NETREG_DUMMY, /* dummy device for NAPI poll */ | |
861 | } reg_state; | |
862 | ||
863 | /* Called from unregister, can be used to call free_netdev */ | |
864 | void (*destructor)(struct net_device *dev); | |
865 | ||
866 | #ifdef CONFIG_NETPOLL | |
867 | struct netpoll_info *npinfo; | |
868 | #endif | |
869 | ||
870 | #ifdef CONFIG_NET_NS | |
871 | /* Network namespace this network device is inside */ | |
872 | struct net *nd_net; | |
873 | #endif | |
874 | ||
875 | /* mid-layer private */ | |
876 | void *ml_priv; | |
877 | ||
878 | /* bridge stuff */ | |
879 | struct net_bridge_port *br_port; | |
880 | /* macvlan */ | |
881 | struct macvlan_port *macvlan_port; | |
882 | /* GARP */ | |
883 | struct garp_port *garp_port; | |
884 | ||
885 | /* class/net/name entry */ | |
886 | struct device dev; | |
887 | /* space for optional statistics and wireless sysfs groups */ | |
888 | struct attribute_group *sysfs_groups[3]; | |
889 | ||
890 | /* rtnetlink link ops */ | |
891 | const struct rtnl_link_ops *rtnl_link_ops; | |
892 | ||
893 | /* VLAN feature mask */ | |
894 | unsigned long vlan_features; | |
895 | ||
896 | /* for setting kernel sock attribute on TCP connection setup */ | |
897 | #define GSO_MAX_SIZE 65536 | |
898 | unsigned int gso_max_size; | |
899 | ||
900 | #ifdef CONFIG_DCB | |
901 | /* Data Center Bridging netlink ops */ | |
902 | struct dcbnl_rtnl_ops *dcbnl_ops; | |
903 | #endif | |
904 | ||
905 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) | |
906 | /* max exchange id for FCoE LRO by ddp */ | |
907 | unsigned int fcoe_ddp_xid; | |
908 | #endif | |
909 | }; | |
910 | #define to_net_dev(d) container_of(d, struct net_device, dev) | |
911 | ||
912 | #define NETDEV_ALIGN 32 | |
913 | ||
914 | static inline | |
915 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, | |
916 | unsigned int index) | |
917 | { | |
918 | return &dev->_tx[index]; | |
919 | } | |
920 | ||
921 | static inline void netdev_for_each_tx_queue(struct net_device *dev, | |
922 | void (*f)(struct net_device *, | |
923 | struct netdev_queue *, | |
924 | void *), | |
925 | void *arg) | |
926 | { | |
927 | unsigned int i; | |
928 | ||
929 | for (i = 0; i < dev->num_tx_queues; i++) | |
930 | f(dev, &dev->_tx[i], arg); | |
931 | } | |
932 | ||
933 | /* | |
934 | * Net namespace inlines | |
935 | */ | |
936 | static inline | |
937 | struct net *dev_net(const struct net_device *dev) | |
938 | { | |
939 | #ifdef CONFIG_NET_NS | |
940 | return dev->nd_net; | |
941 | #else | |
942 | return &init_net; | |
943 | #endif | |
944 | } | |
945 | ||
946 | static inline | |
947 | void dev_net_set(struct net_device *dev, struct net *net) | |
948 | { | |
949 | #ifdef CONFIG_NET_NS | |
950 | release_net(dev->nd_net); | |
951 | dev->nd_net = hold_net(net); | |
952 | #endif | |
953 | } | |
954 | ||
955 | static inline bool netdev_uses_dsa_tags(struct net_device *dev) | |
956 | { | |
957 | #ifdef CONFIG_NET_DSA_TAG_DSA | |
958 | if (dev->dsa_ptr != NULL) | |
959 | return dsa_uses_dsa_tags(dev->dsa_ptr); | |
960 | #endif | |
961 | ||
962 | return 0; | |
963 | } | |
964 | ||
965 | static inline bool netdev_uses_trailer_tags(struct net_device *dev) | |
966 | { | |
967 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
968 | if (dev->dsa_ptr != NULL) | |
969 | return dsa_uses_trailer_tags(dev->dsa_ptr); | |
970 | #endif | |
971 | ||
972 | return 0; | |
973 | } | |
974 | ||
975 | /** | |
976 | * netdev_priv - access network device private data | |
977 | * @dev: network device | |
978 | * | |
979 | * Get network device private data | |
980 | */ | |
981 | static inline void *netdev_priv(const struct net_device *dev) | |
982 | { | |
983 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); | |
984 | } | |
985 | ||
986 | /* Set the sysfs physical device reference for the network logical device | |
987 | * if set prior to registration will cause a symlink during initialization. | |
988 | */ | |
989 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) | |
990 | ||
991 | /** | |
992 | * netif_napi_add - initialize a napi context | |
993 | * @dev: network device | |
994 | * @napi: napi context | |
995 | * @poll: polling function | |
996 | * @weight: default weight | |
997 | * | |
998 | * netif_napi_add() must be used to initialize a napi context prior to calling | |
999 | * *any* of the other napi related functions. | |
1000 | */ | |
1001 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, | |
1002 | int (*poll)(struct napi_struct *, int), int weight); | |
1003 | ||
1004 | /** | |
1005 | * netif_napi_del - remove a napi context | |
1006 | * @napi: napi context | |
1007 | * | |
1008 | * netif_napi_del() removes a napi context from the network device napi list | |
1009 | */ | |
1010 | void netif_napi_del(struct napi_struct *napi); | |
1011 | ||
1012 | struct napi_gro_cb { | |
1013 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ | |
1014 | void *frag0; | |
1015 | ||
1016 | /* Length of frag0. */ | |
1017 | unsigned int frag0_len; | |
1018 | ||
1019 | /* This indicates where we are processing relative to skb->data. */ | |
1020 | int data_offset; | |
1021 | ||
1022 | /* This is non-zero if the packet may be of the same flow. */ | |
1023 | int same_flow; | |
1024 | ||
1025 | /* This is non-zero if the packet cannot be merged with the new skb. */ | |
1026 | int flush; | |
1027 | ||
1028 | /* Number of segments aggregated. */ | |
1029 | int count; | |
1030 | ||
1031 | /* Free the skb? */ | |
1032 | int free; | |
1033 | }; | |
1034 | ||
1035 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) | |
1036 | ||
1037 | struct packet_type { | |
1038 | __be16 type; /* This is really htons(ether_type). */ | |
1039 | struct net_device *dev; /* NULL is wildcarded here */ | |
1040 | int (*func) (struct sk_buff *, | |
1041 | struct net_device *, | |
1042 | struct packet_type *, | |
1043 | struct net_device *); | |
1044 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, | |
1045 | int features); | |
1046 | int (*gso_send_check)(struct sk_buff *skb); | |
1047 | struct sk_buff **(*gro_receive)(struct sk_buff **head, | |
1048 | struct sk_buff *skb); | |
1049 | int (*gro_complete)(struct sk_buff *skb); | |
1050 | void *af_packet_priv; | |
1051 | struct list_head list; | |
1052 | }; | |
1053 | ||
1054 | #include <linux/interrupt.h> | |
1055 | #include <linux/notifier.h> | |
1056 | ||
1057 | extern rwlock_t dev_base_lock; /* Device list lock */ | |
1058 | ||
1059 | ||
1060 | #define for_each_netdev(net, d) \ | |
1061 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) | |
1062 | #define for_each_netdev_safe(net, d, n) \ | |
1063 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) | |
1064 | #define for_each_netdev_continue(net, d) \ | |
1065 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) | |
1066 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) | |
1067 | ||
1068 | static inline struct net_device *next_net_device(struct net_device *dev) | |
1069 | { | |
1070 | struct list_head *lh; | |
1071 | struct net *net; | |
1072 | ||
1073 | net = dev_net(dev); | |
1074 | lh = dev->dev_list.next; | |
1075 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1076 | } | |
1077 | ||
1078 | static inline struct net_device *first_net_device(struct net *net) | |
1079 | { | |
1080 | return list_empty(&net->dev_base_head) ? NULL : | |
1081 | net_device_entry(net->dev_base_head.next); | |
1082 | } | |
1083 | ||
1084 | extern int netdev_boot_setup_check(struct net_device *dev); | |
1085 | extern unsigned long netdev_boot_base(const char *prefix, int unit); | |
1086 | extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr); | |
1087 | extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1088 | extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1089 | extern void dev_add_pack(struct packet_type *pt); | |
1090 | extern void dev_remove_pack(struct packet_type *pt); | |
1091 | extern void __dev_remove_pack(struct packet_type *pt); | |
1092 | ||
1093 | extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags, | |
1094 | unsigned short mask); | |
1095 | extern struct net_device *dev_get_by_name(struct net *net, const char *name); | |
1096 | extern struct net_device *__dev_get_by_name(struct net *net, const char *name); | |
1097 | extern int dev_alloc_name(struct net_device *dev, const char *name); | |
1098 | extern int dev_open(struct net_device *dev); | |
1099 | extern int dev_close(struct net_device *dev); | |
1100 | extern void dev_disable_lro(struct net_device *dev); | |
1101 | extern int dev_queue_xmit(struct sk_buff *skb); | |
1102 | extern int register_netdevice(struct net_device *dev); | |
1103 | extern void unregister_netdevice(struct net_device *dev); | |
1104 | extern void free_netdev(struct net_device *dev); | |
1105 | extern void synchronize_net(void); | |
1106 | extern int register_netdevice_notifier(struct notifier_block *nb); | |
1107 | extern int unregister_netdevice_notifier(struct notifier_block *nb); | |
1108 | extern int init_dummy_netdev(struct net_device *dev); | |
1109 | extern void netdev_resync_ops(struct net_device *dev); | |
1110 | ||
1111 | extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); | |
1112 | extern struct net_device *dev_get_by_index(struct net *net, int ifindex); | |
1113 | extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); | |
1114 | extern int dev_restart(struct net_device *dev); | |
1115 | #ifdef CONFIG_NETPOLL_TRAP | |
1116 | extern int netpoll_trap(void); | |
1117 | #endif | |
1118 | extern int skb_gro_receive(struct sk_buff **head, | |
1119 | struct sk_buff *skb); | |
1120 | extern void skb_gro_reset_offset(struct sk_buff *skb); | |
1121 | ||
1122 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) | |
1123 | { | |
1124 | return NAPI_GRO_CB(skb)->data_offset; | |
1125 | } | |
1126 | ||
1127 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) | |
1128 | { | |
1129 | return skb->len - NAPI_GRO_CB(skb)->data_offset; | |
1130 | } | |
1131 | ||
1132 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) | |
1133 | { | |
1134 | NAPI_GRO_CB(skb)->data_offset += len; | |
1135 | } | |
1136 | ||
1137 | static inline void *skb_gro_header_fast(struct sk_buff *skb, | |
1138 | unsigned int offset) | |
1139 | { | |
1140 | return NAPI_GRO_CB(skb)->frag0 + offset; | |
1141 | } | |
1142 | ||
1143 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) | |
1144 | { | |
1145 | return NAPI_GRO_CB(skb)->frag0_len < hlen; | |
1146 | } | |
1147 | ||
1148 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, | |
1149 | unsigned int offset) | |
1150 | { | |
1151 | NAPI_GRO_CB(skb)->frag0 = NULL; | |
1152 | NAPI_GRO_CB(skb)->frag0_len = 0; | |
1153 | return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL; | |
1154 | } | |
1155 | ||
1156 | static inline void *skb_gro_mac_header(struct sk_buff *skb) | |
1157 | { | |
1158 | return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb); | |
1159 | } | |
1160 | ||
1161 | static inline void *skb_gro_network_header(struct sk_buff *skb) | |
1162 | { | |
1163 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + | |
1164 | skb_network_offset(skb); | |
1165 | } | |
1166 | ||
1167 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, | |
1168 | unsigned short type, | |
1169 | const void *daddr, const void *saddr, | |
1170 | unsigned len) | |
1171 | { | |
1172 | if (!dev->header_ops || !dev->header_ops->create) | |
1173 | return 0; | |
1174 | ||
1175 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); | |
1176 | } | |
1177 | ||
1178 | static inline int dev_parse_header(const struct sk_buff *skb, | |
1179 | unsigned char *haddr) | |
1180 | { | |
1181 | const struct net_device *dev = skb->dev; | |
1182 | ||
1183 | if (!dev->header_ops || !dev->header_ops->parse) | |
1184 | return 0; | |
1185 | return dev->header_ops->parse(skb, haddr); | |
1186 | } | |
1187 | ||
1188 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); | |
1189 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); | |
1190 | static inline int unregister_gifconf(unsigned int family) | |
1191 | { | |
1192 | return register_gifconf(family, NULL); | |
1193 | } | |
1194 | ||
1195 | /* | |
1196 | * Incoming packets are placed on per-cpu queues so that | |
1197 | * no locking is needed. | |
1198 | */ | |
1199 | struct softnet_data | |
1200 | { | |
1201 | struct Qdisc *output_queue; | |
1202 | struct sk_buff_head input_pkt_queue; | |
1203 | struct list_head poll_list; | |
1204 | struct sk_buff *completion_queue; | |
1205 | ||
1206 | struct napi_struct backlog; | |
1207 | }; | |
1208 | ||
1209 | DECLARE_PER_CPU(struct softnet_data,softnet_data); | |
1210 | ||
1211 | #define HAVE_NETIF_QUEUE | |
1212 | ||
1213 | extern void __netif_schedule(struct Qdisc *q); | |
1214 | ||
1215 | static inline void netif_schedule_queue(struct netdev_queue *txq) | |
1216 | { | |
1217 | if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) | |
1218 | __netif_schedule(txq->qdisc); | |
1219 | } | |
1220 | ||
1221 | static inline void netif_tx_schedule_all(struct net_device *dev) | |
1222 | { | |
1223 | unsigned int i; | |
1224 | ||
1225 | for (i = 0; i < dev->num_tx_queues; i++) | |
1226 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); | |
1227 | } | |
1228 | ||
1229 | static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) | |
1230 | { | |
1231 | clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1232 | } | |
1233 | ||
1234 | /** | |
1235 | * netif_start_queue - allow transmit | |
1236 | * @dev: network device | |
1237 | * | |
1238 | * Allow upper layers to call the device hard_start_xmit routine. | |
1239 | */ | |
1240 | static inline void netif_start_queue(struct net_device *dev) | |
1241 | { | |
1242 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); | |
1243 | } | |
1244 | ||
1245 | static inline void netif_tx_start_all_queues(struct net_device *dev) | |
1246 | { | |
1247 | unsigned int i; | |
1248 | ||
1249 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1250 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1251 | netif_tx_start_queue(txq); | |
1252 | } | |
1253 | } | |
1254 | ||
1255 | static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) | |
1256 | { | |
1257 | #ifdef CONFIG_NETPOLL_TRAP | |
1258 | if (netpoll_trap()) { | |
1259 | clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1260 | return; | |
1261 | } | |
1262 | #endif | |
1263 | if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state)) | |
1264 | __netif_schedule(dev_queue->qdisc); | |
1265 | } | |
1266 | ||
1267 | /** | |
1268 | * netif_wake_queue - restart transmit | |
1269 | * @dev: network device | |
1270 | * | |
1271 | * Allow upper layers to call the device hard_start_xmit routine. | |
1272 | * Used for flow control when transmit resources are available. | |
1273 | */ | |
1274 | static inline void netif_wake_queue(struct net_device *dev) | |
1275 | { | |
1276 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); | |
1277 | } | |
1278 | ||
1279 | static inline void netif_tx_wake_all_queues(struct net_device *dev) | |
1280 | { | |
1281 | unsigned int i; | |
1282 | ||
1283 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1284 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1285 | netif_tx_wake_queue(txq); | |
1286 | } | |
1287 | } | |
1288 | ||
1289 | static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) | |
1290 | { | |
1291 | set_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1292 | } | |
1293 | ||
1294 | /** | |
1295 | * netif_stop_queue - stop transmitted packets | |
1296 | * @dev: network device | |
1297 | * | |
1298 | * Stop upper layers calling the device hard_start_xmit routine. | |
1299 | * Used for flow control when transmit resources are unavailable. | |
1300 | */ | |
1301 | static inline void netif_stop_queue(struct net_device *dev) | |
1302 | { | |
1303 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); | |
1304 | } | |
1305 | ||
1306 | static inline void netif_tx_stop_all_queues(struct net_device *dev) | |
1307 | { | |
1308 | unsigned int i; | |
1309 | ||
1310 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1311 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1312 | netif_tx_stop_queue(txq); | |
1313 | } | |
1314 | } | |
1315 | ||
1316 | static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue) | |
1317 | { | |
1318 | return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1319 | } | |
1320 | ||
1321 | /** | |
1322 | * netif_queue_stopped - test if transmit queue is flowblocked | |
1323 | * @dev: network device | |
1324 | * | |
1325 | * Test if transmit queue on device is currently unable to send. | |
1326 | */ | |
1327 | static inline int netif_queue_stopped(const struct net_device *dev) | |
1328 | { | |
1329 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); | |
1330 | } | |
1331 | ||
1332 | static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue) | |
1333 | { | |
1334 | return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state); | |
1335 | } | |
1336 | ||
1337 | /** | |
1338 | * netif_running - test if up | |
1339 | * @dev: network device | |
1340 | * | |
1341 | * Test if the device has been brought up. | |
1342 | */ | |
1343 | static inline int netif_running(const struct net_device *dev) | |
1344 | { | |
1345 | return test_bit(__LINK_STATE_START, &dev->state); | |
1346 | } | |
1347 | ||
1348 | /* | |
1349 | * Routines to manage the subqueues on a device. We only need start | |
1350 | * stop, and a check if it's stopped. All other device management is | |
1351 | * done at the overall netdevice level. | |
1352 | * Also test the device if we're multiqueue. | |
1353 | */ | |
1354 | ||
1355 | /** | |
1356 | * netif_start_subqueue - allow sending packets on subqueue | |
1357 | * @dev: network device | |
1358 | * @queue_index: sub queue index | |
1359 | * | |
1360 | * Start individual transmit queue of a device with multiple transmit queues. | |
1361 | */ | |
1362 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) | |
1363 | { | |
1364 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); | |
1365 | clear_bit(__QUEUE_STATE_XOFF, &txq->state); | |
1366 | } | |
1367 | ||
1368 | /** | |
1369 | * netif_stop_subqueue - stop sending packets on subqueue | |
1370 | * @dev: network device | |
1371 | * @queue_index: sub queue index | |
1372 | * | |
1373 | * Stop individual transmit queue of a device with multiple transmit queues. | |
1374 | */ | |
1375 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) | |
1376 | { | |
1377 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); | |
1378 | #ifdef CONFIG_NETPOLL_TRAP | |
1379 | if (netpoll_trap()) | |
1380 | return; | |
1381 | #endif | |
1382 | set_bit(__QUEUE_STATE_XOFF, &txq->state); | |
1383 | } | |
1384 | ||
1385 | /** | |
1386 | * netif_subqueue_stopped - test status of subqueue | |
1387 | * @dev: network device | |
1388 | * @queue_index: sub queue index | |
1389 | * | |
1390 | * Check individual transmit queue of a device with multiple transmit queues. | |
1391 | */ | |
1392 | static inline int __netif_subqueue_stopped(const struct net_device *dev, | |
1393 | u16 queue_index) | |
1394 | { | |
1395 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); | |
1396 | return test_bit(__QUEUE_STATE_XOFF, &txq->state); | |
1397 | } | |
1398 | ||
1399 | static inline int netif_subqueue_stopped(const struct net_device *dev, | |
1400 | struct sk_buff *skb) | |
1401 | { | |
1402 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); | |
1403 | } | |
1404 | ||
1405 | /** | |
1406 | * netif_wake_subqueue - allow sending packets on subqueue | |
1407 | * @dev: network device | |
1408 | * @queue_index: sub queue index | |
1409 | * | |
1410 | * Resume individual transmit queue of a device with multiple transmit queues. | |
1411 | */ | |
1412 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) | |
1413 | { | |
1414 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); | |
1415 | #ifdef CONFIG_NETPOLL_TRAP | |
1416 | if (netpoll_trap()) | |
1417 | return; | |
1418 | #endif | |
1419 | if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state)) | |
1420 | __netif_schedule(txq->qdisc); | |
1421 | } | |
1422 | ||
1423 | /** | |
1424 | * netif_is_multiqueue - test if device has multiple transmit queues | |
1425 | * @dev: network device | |
1426 | * | |
1427 | * Check if device has multiple transmit queues | |
1428 | */ | |
1429 | static inline int netif_is_multiqueue(const struct net_device *dev) | |
1430 | { | |
1431 | return (dev->num_tx_queues > 1); | |
1432 | } | |
1433 | ||
1434 | /* Use this variant when it is known for sure that it | |
1435 | * is executing from hardware interrupt context or with hardware interrupts | |
1436 | * disabled. | |
1437 | */ | |
1438 | extern void dev_kfree_skb_irq(struct sk_buff *skb); | |
1439 | ||
1440 | /* Use this variant in places where it could be invoked | |
1441 | * from either hardware interrupt or other context, with hardware interrupts | |
1442 | * either disabled or enabled. | |
1443 | */ | |
1444 | extern void dev_kfree_skb_any(struct sk_buff *skb); | |
1445 | ||
1446 | #define HAVE_NETIF_RX 1 | |
1447 | extern int netif_rx(struct sk_buff *skb); | |
1448 | extern int netif_rx_ni(struct sk_buff *skb); | |
1449 | #define HAVE_NETIF_RECEIVE_SKB 1 | |
1450 | extern int netif_receive_skb(struct sk_buff *skb); | |
1451 | extern void napi_gro_flush(struct napi_struct *napi); | |
1452 | extern int dev_gro_receive(struct napi_struct *napi, | |
1453 | struct sk_buff *skb); | |
1454 | extern int napi_skb_finish(int ret, struct sk_buff *skb); | |
1455 | extern int napi_gro_receive(struct napi_struct *napi, | |
1456 | struct sk_buff *skb); | |
1457 | extern void napi_reuse_skb(struct napi_struct *napi, | |
1458 | struct sk_buff *skb); | |
1459 | extern struct sk_buff * napi_get_frags(struct napi_struct *napi); | |
1460 | extern int napi_frags_finish(struct napi_struct *napi, | |
1461 | struct sk_buff *skb, int ret); | |
1462 | extern struct sk_buff * napi_frags_skb(struct napi_struct *napi); | |
1463 | extern int napi_gro_frags(struct napi_struct *napi); | |
1464 | ||
1465 | static inline void napi_free_frags(struct napi_struct *napi) | |
1466 | { | |
1467 | kfree_skb(napi->skb); | |
1468 | napi->skb = NULL; | |
1469 | } | |
1470 | ||
1471 | extern void netif_nit_deliver(struct sk_buff *skb); | |
1472 | extern int dev_valid_name(const char *name); | |
1473 | extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); | |
1474 | extern int dev_ethtool(struct net *net, struct ifreq *); | |
1475 | extern unsigned dev_get_flags(const struct net_device *); | |
1476 | extern int dev_change_flags(struct net_device *, unsigned); | |
1477 | extern int dev_change_name(struct net_device *, const char *); | |
1478 | extern int dev_set_alias(struct net_device *, const char *, size_t); | |
1479 | extern int dev_change_net_namespace(struct net_device *, | |
1480 | struct net *, const char *); | |
1481 | extern int dev_set_mtu(struct net_device *, int); | |
1482 | extern int dev_set_mac_address(struct net_device *, | |
1483 | struct sockaddr *); | |
1484 | extern int dev_hard_start_xmit(struct sk_buff *skb, | |
1485 | struct net_device *dev, | |
1486 | struct netdev_queue *txq); | |
1487 | ||
1488 | extern int netdev_budget; | |
1489 | ||
1490 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
1491 | extern void netdev_run_todo(void); | |
1492 | ||
1493 | /** | |
1494 | * dev_put - release reference to device | |
1495 | * @dev: network device | |
1496 | * | |
1497 | * Release reference to device to allow it to be freed. | |
1498 | */ | |
1499 | static inline void dev_put(struct net_device *dev) | |
1500 | { | |
1501 | atomic_dec(&dev->refcnt); | |
1502 | } | |
1503 | ||
1504 | /** | |
1505 | * dev_hold - get reference to device | |
1506 | * @dev: network device | |
1507 | * | |
1508 | * Hold reference to device to keep it from being freed. | |
1509 | */ | |
1510 | static inline void dev_hold(struct net_device *dev) | |
1511 | { | |
1512 | atomic_inc(&dev->refcnt); | |
1513 | } | |
1514 | ||
1515 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
1516 | * and _off may be called from IRQ context, but it is caller | |
1517 | * who is responsible for serialization of these calls. | |
1518 | * | |
1519 | * The name carrier is inappropriate, these functions should really be | |
1520 | * called netif_lowerlayer_*() because they represent the state of any | |
1521 | * kind of lower layer not just hardware media. | |
1522 | */ | |
1523 | ||
1524 | extern void linkwatch_fire_event(struct net_device *dev); | |
1525 | ||
1526 | /** | |
1527 | * netif_carrier_ok - test if carrier present | |
1528 | * @dev: network device | |
1529 | * | |
1530 | * Check if carrier is present on device | |
1531 | */ | |
1532 | static inline int netif_carrier_ok(const struct net_device *dev) | |
1533 | { | |
1534 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
1535 | } | |
1536 | ||
1537 | extern unsigned long dev_trans_start(struct net_device *dev); | |
1538 | ||
1539 | extern void __netdev_watchdog_up(struct net_device *dev); | |
1540 | ||
1541 | extern void netif_carrier_on(struct net_device *dev); | |
1542 | ||
1543 | extern void netif_carrier_off(struct net_device *dev); | |
1544 | ||
1545 | /** | |
1546 | * netif_dormant_on - mark device as dormant. | |
1547 | * @dev: network device | |
1548 | * | |
1549 | * Mark device as dormant (as per RFC2863). | |
1550 | * | |
1551 | * The dormant state indicates that the relevant interface is not | |
1552 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
1553 | * in a "pending" state, waiting for some external event. For "on- | |
1554 | * demand" interfaces, this new state identifies the situation where the | |
1555 | * interface is waiting for events to place it in the up state. | |
1556 | * | |
1557 | */ | |
1558 | static inline void netif_dormant_on(struct net_device *dev) | |
1559 | { | |
1560 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
1561 | linkwatch_fire_event(dev); | |
1562 | } | |
1563 | ||
1564 | /** | |
1565 | * netif_dormant_off - set device as not dormant. | |
1566 | * @dev: network device | |
1567 | * | |
1568 | * Device is not in dormant state. | |
1569 | */ | |
1570 | static inline void netif_dormant_off(struct net_device *dev) | |
1571 | { | |
1572 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
1573 | linkwatch_fire_event(dev); | |
1574 | } | |
1575 | ||
1576 | /** | |
1577 | * netif_dormant - test if carrier present | |
1578 | * @dev: network device | |
1579 | * | |
1580 | * Check if carrier is present on device | |
1581 | */ | |
1582 | static inline int netif_dormant(const struct net_device *dev) | |
1583 | { | |
1584 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
1585 | } | |
1586 | ||
1587 | ||
1588 | /** | |
1589 | * netif_oper_up - test if device is operational | |
1590 | * @dev: network device | |
1591 | * | |
1592 | * Check if carrier is operational | |
1593 | */ | |
1594 | static inline int netif_oper_up(const struct net_device *dev) { | |
1595 | return (dev->operstate == IF_OPER_UP || | |
1596 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
1597 | } | |
1598 | ||
1599 | /** | |
1600 | * netif_device_present - is device available or removed | |
1601 | * @dev: network device | |
1602 | * | |
1603 | * Check if device has not been removed from system. | |
1604 | */ | |
1605 | static inline int netif_device_present(struct net_device *dev) | |
1606 | { | |
1607 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
1608 | } | |
1609 | ||
1610 | extern void netif_device_detach(struct net_device *dev); | |
1611 | ||
1612 | extern void netif_device_attach(struct net_device *dev); | |
1613 | ||
1614 | /* | |
1615 | * Network interface message level settings | |
1616 | */ | |
1617 | #define HAVE_NETIF_MSG 1 | |
1618 | ||
1619 | enum { | |
1620 | NETIF_MSG_DRV = 0x0001, | |
1621 | NETIF_MSG_PROBE = 0x0002, | |
1622 | NETIF_MSG_LINK = 0x0004, | |
1623 | NETIF_MSG_TIMER = 0x0008, | |
1624 | NETIF_MSG_IFDOWN = 0x0010, | |
1625 | NETIF_MSG_IFUP = 0x0020, | |
1626 | NETIF_MSG_RX_ERR = 0x0040, | |
1627 | NETIF_MSG_TX_ERR = 0x0080, | |
1628 | NETIF_MSG_TX_QUEUED = 0x0100, | |
1629 | NETIF_MSG_INTR = 0x0200, | |
1630 | NETIF_MSG_TX_DONE = 0x0400, | |
1631 | NETIF_MSG_RX_STATUS = 0x0800, | |
1632 | NETIF_MSG_PKTDATA = 0x1000, | |
1633 | NETIF_MSG_HW = 0x2000, | |
1634 | NETIF_MSG_WOL = 0x4000, | |
1635 | }; | |
1636 | ||
1637 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
1638 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
1639 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
1640 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
1641 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
1642 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
1643 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
1644 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
1645 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
1646 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
1647 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
1648 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
1649 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
1650 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
1651 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
1652 | ||
1653 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
1654 | { | |
1655 | /* use default */ | |
1656 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
1657 | return default_msg_enable_bits; | |
1658 | if (debug_value == 0) /* no output */ | |
1659 | return 0; | |
1660 | /* set low N bits */ | |
1661 | return (1 << debug_value) - 1; | |
1662 | } | |
1663 | ||
1664 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) | |
1665 | { | |
1666 | spin_lock(&txq->_xmit_lock); | |
1667 | txq->xmit_lock_owner = cpu; | |
1668 | } | |
1669 | ||
1670 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) | |
1671 | { | |
1672 | spin_lock_bh(&txq->_xmit_lock); | |
1673 | txq->xmit_lock_owner = smp_processor_id(); | |
1674 | } | |
1675 | ||
1676 | static inline int __netif_tx_trylock(struct netdev_queue *txq) | |
1677 | { | |
1678 | int ok = spin_trylock(&txq->_xmit_lock); | |
1679 | if (likely(ok)) | |
1680 | txq->xmit_lock_owner = smp_processor_id(); | |
1681 | return ok; | |
1682 | } | |
1683 | ||
1684 | static inline void __netif_tx_unlock(struct netdev_queue *txq) | |
1685 | { | |
1686 | txq->xmit_lock_owner = -1; | |
1687 | spin_unlock(&txq->_xmit_lock); | |
1688 | } | |
1689 | ||
1690 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) | |
1691 | { | |
1692 | txq->xmit_lock_owner = -1; | |
1693 | spin_unlock_bh(&txq->_xmit_lock); | |
1694 | } | |
1695 | ||
1696 | static inline void txq_trans_update(struct netdev_queue *txq) | |
1697 | { | |
1698 | if (txq->xmit_lock_owner != -1) | |
1699 | txq->trans_start = jiffies; | |
1700 | } | |
1701 | ||
1702 | /** | |
1703 | * netif_tx_lock - grab network device transmit lock | |
1704 | * @dev: network device | |
1705 | * | |
1706 | * Get network device transmit lock | |
1707 | */ | |
1708 | static inline void netif_tx_lock(struct net_device *dev) | |
1709 | { | |
1710 | unsigned int i; | |
1711 | int cpu; | |
1712 | ||
1713 | spin_lock(&dev->tx_global_lock); | |
1714 | cpu = smp_processor_id(); | |
1715 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1716 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1717 | ||
1718 | /* We are the only thread of execution doing a | |
1719 | * freeze, but we have to grab the _xmit_lock in | |
1720 | * order to synchronize with threads which are in | |
1721 | * the ->hard_start_xmit() handler and already | |
1722 | * checked the frozen bit. | |
1723 | */ | |
1724 | __netif_tx_lock(txq, cpu); | |
1725 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
1726 | __netif_tx_unlock(txq); | |
1727 | } | |
1728 | } | |
1729 | ||
1730 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
1731 | { | |
1732 | local_bh_disable(); | |
1733 | netif_tx_lock(dev); | |
1734 | } | |
1735 | ||
1736 | static inline void netif_tx_unlock(struct net_device *dev) | |
1737 | { | |
1738 | unsigned int i; | |
1739 | ||
1740 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1741 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1742 | ||
1743 | /* No need to grab the _xmit_lock here. If the | |
1744 | * queue is not stopped for another reason, we | |
1745 | * force a schedule. | |
1746 | */ | |
1747 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
1748 | if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) | |
1749 | __netif_schedule(txq->qdisc); | |
1750 | } | |
1751 | spin_unlock(&dev->tx_global_lock); | |
1752 | } | |
1753 | ||
1754 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
1755 | { | |
1756 | netif_tx_unlock(dev); | |
1757 | local_bh_enable(); | |
1758 | } | |
1759 | ||
1760 | #define HARD_TX_LOCK(dev, txq, cpu) { \ | |
1761 | if ((dev->features & NETIF_F_LLTX) == 0) { \ | |
1762 | __netif_tx_lock(txq, cpu); \ | |
1763 | } \ | |
1764 | } | |
1765 | ||
1766 | #define HARD_TX_UNLOCK(dev, txq) { \ | |
1767 | if ((dev->features & NETIF_F_LLTX) == 0) { \ | |
1768 | __netif_tx_unlock(txq); \ | |
1769 | } \ | |
1770 | } | |
1771 | ||
1772 | static inline void netif_tx_disable(struct net_device *dev) | |
1773 | { | |
1774 | unsigned int i; | |
1775 | int cpu; | |
1776 | ||
1777 | local_bh_disable(); | |
1778 | cpu = smp_processor_id(); | |
1779 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1780 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1781 | ||
1782 | __netif_tx_lock(txq, cpu); | |
1783 | netif_tx_stop_queue(txq); | |
1784 | __netif_tx_unlock(txq); | |
1785 | } | |
1786 | local_bh_enable(); | |
1787 | } | |
1788 | ||
1789 | static inline void netif_addr_lock(struct net_device *dev) | |
1790 | { | |
1791 | spin_lock(&dev->addr_list_lock); | |
1792 | } | |
1793 | ||
1794 | static inline void netif_addr_lock_bh(struct net_device *dev) | |
1795 | { | |
1796 | spin_lock_bh(&dev->addr_list_lock); | |
1797 | } | |
1798 | ||
1799 | static inline void netif_addr_unlock(struct net_device *dev) | |
1800 | { | |
1801 | spin_unlock(&dev->addr_list_lock); | |
1802 | } | |
1803 | ||
1804 | static inline void netif_addr_unlock_bh(struct net_device *dev) | |
1805 | { | |
1806 | spin_unlock_bh(&dev->addr_list_lock); | |
1807 | } | |
1808 | ||
1809 | /* | |
1810 | * dev_addrs walker. Should be used only for read access. Call with | |
1811 | * rcu_read_lock held. | |
1812 | */ | |
1813 | #define for_each_dev_addr(dev, ha) \ | |
1814 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) | |
1815 | ||
1816 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ | |
1817 | ||
1818 | extern void ether_setup(struct net_device *dev); | |
1819 | ||
1820 | /* Support for loadable net-drivers */ | |
1821 | extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, | |
1822 | void (*setup)(struct net_device *), | |
1823 | unsigned int queue_count); | |
1824 | #define alloc_netdev(sizeof_priv, name, setup) \ | |
1825 | alloc_netdev_mq(sizeof_priv, name, setup, 1) | |
1826 | extern int register_netdev(struct net_device *dev); | |
1827 | extern void unregister_netdev(struct net_device *dev); | |
1828 | ||
1829 | /* Functions used for device addresses handling */ | |
1830 | extern int dev_addr_add(struct net_device *dev, unsigned char *addr, | |
1831 | unsigned char addr_type); | |
1832 | extern int dev_addr_del(struct net_device *dev, unsigned char *addr, | |
1833 | unsigned char addr_type); | |
1834 | extern int dev_addr_add_multiple(struct net_device *to_dev, | |
1835 | struct net_device *from_dev, | |
1836 | unsigned char addr_type); | |
1837 | extern int dev_addr_del_multiple(struct net_device *to_dev, | |
1838 | struct net_device *from_dev, | |
1839 | unsigned char addr_type); | |
1840 | ||
1841 | /* Functions used for secondary unicast and multicast support */ | |
1842 | extern void dev_set_rx_mode(struct net_device *dev); | |
1843 | extern void __dev_set_rx_mode(struct net_device *dev); | |
1844 | extern int dev_unicast_delete(struct net_device *dev, void *addr); | |
1845 | extern int dev_unicast_add(struct net_device *dev, void *addr); | |
1846 | extern int dev_unicast_sync(struct net_device *to, struct net_device *from); | |
1847 | extern void dev_unicast_unsync(struct net_device *to, struct net_device *from); | |
1848 | extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); | |
1849 | extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); | |
1850 | extern int dev_mc_sync(struct net_device *to, struct net_device *from); | |
1851 | extern void dev_mc_unsync(struct net_device *to, struct net_device *from); | |
1852 | extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all); | |
1853 | extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly); | |
1854 | extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); | |
1855 | extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); | |
1856 | extern int dev_set_promiscuity(struct net_device *dev, int inc); | |
1857 | extern int dev_set_allmulti(struct net_device *dev, int inc); | |
1858 | extern void netdev_state_change(struct net_device *dev); | |
1859 | extern void netdev_bonding_change(struct net_device *dev); | |
1860 | extern void netdev_features_change(struct net_device *dev); | |
1861 | /* Load a device via the kmod */ | |
1862 | extern void dev_load(struct net *net, const char *name); | |
1863 | extern void dev_mcast_init(void); | |
1864 | extern const struct net_device_stats *dev_get_stats(struct net_device *dev); | |
1865 | ||
1866 | extern int netdev_max_backlog; | |
1867 | extern int weight_p; | |
1868 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); | |
1869 | extern int skb_checksum_help(struct sk_buff *skb); | |
1870 | extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); | |
1871 | #ifdef CONFIG_BUG | |
1872 | extern void netdev_rx_csum_fault(struct net_device *dev); | |
1873 | #else | |
1874 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
1875 | { | |
1876 | } | |
1877 | #endif | |
1878 | /* rx skb timestamps */ | |
1879 | extern void net_enable_timestamp(void); | |
1880 | extern void net_disable_timestamp(void); | |
1881 | ||
1882 | #ifdef CONFIG_PROC_FS | |
1883 | extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); | |
1884 | extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); | |
1885 | extern void dev_seq_stop(struct seq_file *seq, void *v); | |
1886 | #endif | |
1887 | ||
1888 | extern int netdev_class_create_file(struct class_attribute *class_attr); | |
1889 | extern void netdev_class_remove_file(struct class_attribute *class_attr); | |
1890 | ||
1891 | extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len); | |
1892 | ||
1893 | extern void linkwatch_run_queue(void); | |
1894 | ||
1895 | unsigned long netdev_increment_features(unsigned long all, unsigned long one, | |
1896 | unsigned long mask); | |
1897 | unsigned long netdev_fix_features(unsigned long features, const char *name); | |
1898 | ||
1899 | static inline int net_gso_ok(int features, int gso_type) | |
1900 | { | |
1901 | int feature = gso_type << NETIF_F_GSO_SHIFT; | |
1902 | return (features & feature) == feature; | |
1903 | } | |
1904 | ||
1905 | static inline int skb_gso_ok(struct sk_buff *skb, int features) | |
1906 | { | |
1907 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && | |
1908 | (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST)); | |
1909 | } | |
1910 | ||
1911 | static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) | |
1912 | { | |
1913 | return skb_is_gso(skb) && | |
1914 | (!skb_gso_ok(skb, dev->features) || | |
1915 | unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); | |
1916 | } | |
1917 | ||
1918 | static inline void netif_set_gso_max_size(struct net_device *dev, | |
1919 | unsigned int size) | |
1920 | { | |
1921 | dev->gso_max_size = size; | |
1922 | } | |
1923 | ||
1924 | static inline void skb_bond_set_mac_by_master(struct sk_buff *skb, | |
1925 | struct net_device *master) | |
1926 | { | |
1927 | if (skb->pkt_type == PACKET_HOST) { | |
1928 | u16 *dest = (u16 *) eth_hdr(skb)->h_dest; | |
1929 | ||
1930 | memcpy(dest, master->dev_addr, ETH_ALEN); | |
1931 | } | |
1932 | } | |
1933 | ||
1934 | /* On bonding slaves other than the currently active slave, suppress | |
1935 | * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and | |
1936 | * ARP on active-backup slaves with arp_validate enabled. | |
1937 | */ | |
1938 | static inline int skb_bond_should_drop(struct sk_buff *skb) | |
1939 | { | |
1940 | struct net_device *dev = skb->dev; | |
1941 | struct net_device *master = dev->master; | |
1942 | ||
1943 | if (master) { | |
1944 | if (master->priv_flags & IFF_MASTER_ARPMON) | |
1945 | dev->last_rx = jiffies; | |
1946 | ||
1947 | if ((master->priv_flags & IFF_MASTER_ALB) && master->br_port) { | |
1948 | /* Do address unmangle. The local destination address | |
1949 | * will be always the one master has. Provides the right | |
1950 | * functionality in a bridge. | |
1951 | */ | |
1952 | skb_bond_set_mac_by_master(skb, master); | |
1953 | } | |
1954 | ||
1955 | if (dev->priv_flags & IFF_SLAVE_INACTIVE) { | |
1956 | if ((dev->priv_flags & IFF_SLAVE_NEEDARP) && | |
1957 | skb->protocol == __cpu_to_be16(ETH_P_ARP)) | |
1958 | return 0; | |
1959 | ||
1960 | if (master->priv_flags & IFF_MASTER_ALB) { | |
1961 | if (skb->pkt_type != PACKET_BROADCAST && | |
1962 | skb->pkt_type != PACKET_MULTICAST) | |
1963 | return 0; | |
1964 | } | |
1965 | if (master->priv_flags & IFF_MASTER_8023AD && | |
1966 | skb->protocol == __cpu_to_be16(ETH_P_SLOW)) | |
1967 | return 0; | |
1968 | ||
1969 | return 1; | |
1970 | } | |
1971 | } | |
1972 | return 0; | |
1973 | } | |
1974 | ||
1975 | extern struct pernet_operations __net_initdata loopback_net_ops; | |
1976 | ||
1977 | static inline int dev_ethtool_get_settings(struct net_device *dev, | |
1978 | struct ethtool_cmd *cmd) | |
1979 | { | |
1980 | if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings) | |
1981 | return -EOPNOTSUPP; | |
1982 | return dev->ethtool_ops->get_settings(dev, cmd); | |
1983 | } | |
1984 | ||
1985 | static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev) | |
1986 | { | |
1987 | if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum) | |
1988 | return 0; | |
1989 | return dev->ethtool_ops->get_rx_csum(dev); | |
1990 | } | |
1991 | ||
1992 | static inline u32 dev_ethtool_get_flags(struct net_device *dev) | |
1993 | { | |
1994 | if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags) | |
1995 | return 0; | |
1996 | return dev->ethtool_ops->get_flags(dev); | |
1997 | } | |
1998 | #endif /* __KERNEL__ */ | |
1999 | ||
2000 | #endif /* _LINUX_NETDEVICE_H */ |