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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 | /* Driver transmit return codes */ | |
83 | enum netdev_tx { | |
84 | NETDEV_TX_OK = 0, /* driver took care of packet */ | |
85 | NETDEV_TX_BUSY, /* driver tx path was busy*/ | |
86 | NETDEV_TX_LOCKED = -1, /* driver tx lock was already taken */ | |
87 | }; | |
88 | typedef enum netdev_tx netdev_tx_t; | |
89 | ||
90 | #endif | |
91 | ||
92 | #define MAX_ADDR_LEN 32 /* Largest hardware address length */ | |
93 | ||
94 | #ifdef __KERNEL__ | |
95 | /* | |
96 | * Compute the worst case header length according to the protocols | |
97 | * used. | |
98 | */ | |
99 | ||
100 | #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) | |
101 | # if defined(CONFIG_MAC80211_MESH) | |
102 | # define LL_MAX_HEADER 128 | |
103 | # else | |
104 | # define LL_MAX_HEADER 96 | |
105 | # endif | |
106 | #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE) | |
107 | # define LL_MAX_HEADER 48 | |
108 | #else | |
109 | # define LL_MAX_HEADER 32 | |
110 | #endif | |
111 | ||
112 | #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \ | |
113 | !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \ | |
114 | !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \ | |
115 | !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE) | |
116 | #define MAX_HEADER LL_MAX_HEADER | |
117 | #else | |
118 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
119 | #endif | |
120 | ||
121 | #endif /* __KERNEL__ */ | |
122 | ||
123 | /* | |
124 | * Network device statistics. Akin to the 2.0 ether stats but | |
125 | * with byte counters. | |
126 | */ | |
127 | ||
128 | struct net_device_stats | |
129 | { | |
130 | unsigned long rx_packets; /* total packets received */ | |
131 | unsigned long tx_packets; /* total packets transmitted */ | |
132 | unsigned long rx_bytes; /* total bytes received */ | |
133 | unsigned long tx_bytes; /* total bytes transmitted */ | |
134 | unsigned long rx_errors; /* bad packets received */ | |
135 | unsigned long tx_errors; /* packet transmit problems */ | |
136 | unsigned long rx_dropped; /* no space in linux buffers */ | |
137 | unsigned long tx_dropped; /* no space available in linux */ | |
138 | unsigned long multicast; /* multicast packets received */ | |
139 | unsigned long collisions; | |
140 | ||
141 | /* detailed rx_errors: */ | |
142 | unsigned long rx_length_errors; | |
143 | unsigned long rx_over_errors; /* receiver ring buff overflow */ | |
144 | unsigned long rx_crc_errors; /* recved pkt with crc error */ | |
145 | unsigned long rx_frame_errors; /* recv'd frame alignment error */ | |
146 | unsigned long rx_fifo_errors; /* recv'r fifo overrun */ | |
147 | unsigned long rx_missed_errors; /* receiver missed packet */ | |
148 | ||
149 | /* detailed tx_errors */ | |
150 | unsigned long tx_aborted_errors; | |
151 | unsigned long tx_carrier_errors; | |
152 | unsigned long tx_fifo_errors; | |
153 | unsigned long tx_heartbeat_errors; | |
154 | unsigned long tx_window_errors; | |
155 | ||
156 | /* for cslip etc */ | |
157 | unsigned long rx_compressed; | |
158 | unsigned long tx_compressed; | |
159 | }; | |
160 | ||
161 | ||
162 | /* Media selection options. */ | |
163 | enum { | |
164 | IF_PORT_UNKNOWN = 0, | |
165 | IF_PORT_10BASE2, | |
166 | IF_PORT_10BASET, | |
167 | IF_PORT_AUI, | |
168 | IF_PORT_100BASET, | |
169 | IF_PORT_100BASETX, | |
170 | IF_PORT_100BASEFX | |
171 | }; | |
172 | ||
173 | #ifdef __KERNEL__ | |
174 | ||
175 | #include <linux/cache.h> | |
176 | #include <linux/skbuff.h> | |
177 | ||
178 | struct neighbour; | |
179 | struct neigh_parms; | |
180 | struct sk_buff; | |
181 | ||
182 | struct netif_rx_stats | |
183 | { | |
184 | unsigned total; | |
185 | unsigned dropped; | |
186 | unsigned time_squeeze; | |
187 | unsigned cpu_collision; | |
188 | }; | |
189 | ||
190 | DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); | |
191 | ||
192 | struct dev_addr_list | |
193 | { | |
194 | struct dev_addr_list *next; | |
195 | u8 da_addr[MAX_ADDR_LEN]; | |
196 | u8 da_addrlen; | |
197 | u8 da_synced; | |
198 | int da_users; | |
199 | int da_gusers; | |
200 | }; | |
201 | ||
202 | /* | |
203 | * We tag multicasts with these structures. | |
204 | */ | |
205 | ||
206 | #define dev_mc_list dev_addr_list | |
207 | #define dmi_addr da_addr | |
208 | #define dmi_addrlen da_addrlen | |
209 | #define dmi_users da_users | |
210 | #define dmi_gusers da_gusers | |
211 | ||
212 | struct netdev_hw_addr { | |
213 | struct list_head list; | |
214 | unsigned char addr[MAX_ADDR_LEN]; | |
215 | unsigned char type; | |
216 | #define NETDEV_HW_ADDR_T_LAN 1 | |
217 | #define NETDEV_HW_ADDR_T_SAN 2 | |
218 | #define NETDEV_HW_ADDR_T_SLAVE 3 | |
219 | #define NETDEV_HW_ADDR_T_UNICAST 4 | |
220 | int refcount; | |
221 | bool synced; | |
222 | struct rcu_head rcu_head; | |
223 | }; | |
224 | ||
225 | struct netdev_hw_addr_list { | |
226 | struct list_head list; | |
227 | int count; | |
228 | }; | |
229 | ||
230 | struct hh_cache | |
231 | { | |
232 | struct hh_cache *hh_next; /* Next entry */ | |
233 | atomic_t hh_refcnt; /* number of users */ | |
234 | /* | |
235 | * We want hh_output, hh_len, hh_lock and hh_data be a in a separate | |
236 | * cache line on SMP. | |
237 | * They are mostly read, but hh_refcnt may be changed quite frequently, | |
238 | * incurring cache line ping pongs. | |
239 | */ | |
240 | __be16 hh_type ____cacheline_aligned_in_smp; | |
241 | /* protocol identifier, f.e ETH_P_IP | |
242 | * NOTE: For VLANs, this will be the | |
243 | * encapuslated type. --BLG | |
244 | */ | |
245 | u16 hh_len; /* length of header */ | |
246 | int (*hh_output)(struct sk_buff *skb); | |
247 | seqlock_t hh_lock; | |
248 | ||
249 | /* cached hardware header; allow for machine alignment needs. */ | |
250 | #define HH_DATA_MOD 16 | |
251 | #define HH_DATA_OFF(__len) \ | |
252 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) | |
253 | #define HH_DATA_ALIGN(__len) \ | |
254 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
255 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
256 | }; | |
257 | ||
258 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
259 | * Alternative is: | |
260 | * dev->hard_header_len ? (dev->hard_header_len + | |
261 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
262 | * | |
263 | * We could use other alignment values, but we must maintain the | |
264 | * relationship HH alignment <= LL alignment. | |
265 | * | |
266 | * LL_ALLOCATED_SPACE also takes into account the tailroom the device | |
267 | * may need. | |
268 | */ | |
269 | #define LL_RESERVED_SPACE(dev) \ | |
270 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
271 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ | |
272 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
273 | #define LL_ALLOCATED_SPACE(dev) \ | |
274 | ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
275 | ||
276 | struct header_ops { | |
277 | int (*create) (struct sk_buff *skb, struct net_device *dev, | |
278 | unsigned short type, const void *daddr, | |
279 | const void *saddr, unsigned len); | |
280 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); | |
281 | int (*rebuild)(struct sk_buff *skb); | |
282 | #define HAVE_HEADER_CACHE | |
283 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh); | |
284 | void (*cache_update)(struct hh_cache *hh, | |
285 | const struct net_device *dev, | |
286 | const unsigned char *haddr); | |
287 | }; | |
288 | ||
289 | /* These flag bits are private to the generic network queueing | |
290 | * layer, they may not be explicitly referenced by any other | |
291 | * code. | |
292 | */ | |
293 | ||
294 | enum netdev_state_t | |
295 | { | |
296 | __LINK_STATE_START, | |
297 | __LINK_STATE_PRESENT, | |
298 | __LINK_STATE_NOCARRIER, | |
299 | __LINK_STATE_LINKWATCH_PENDING, | |
300 | __LINK_STATE_DORMANT, | |
301 | }; | |
302 | ||
303 | ||
304 | /* | |
305 | * This structure holds at boot time configured netdevice settings. They | |
306 | * are then used in the device probing. | |
307 | */ | |
308 | struct netdev_boot_setup { | |
309 | char name[IFNAMSIZ]; | |
310 | struct ifmap map; | |
311 | }; | |
312 | #define NETDEV_BOOT_SETUP_MAX 8 | |
313 | ||
314 | extern int __init netdev_boot_setup(char *str); | |
315 | ||
316 | /* | |
317 | * Structure for NAPI scheduling similar to tasklet but with weighting | |
318 | */ | |
319 | struct napi_struct { | |
320 | /* The poll_list must only be managed by the entity which | |
321 | * changes the state of the NAPI_STATE_SCHED bit. This means | |
322 | * whoever atomically sets that bit can add this napi_struct | |
323 | * to the per-cpu poll_list, and whoever clears that bit | |
324 | * can remove from the list right before clearing the bit. | |
325 | */ | |
326 | struct list_head poll_list; | |
327 | ||
328 | unsigned long state; | |
329 | int weight; | |
330 | int (*poll)(struct napi_struct *, int); | |
331 | #ifdef CONFIG_NETPOLL | |
332 | spinlock_t poll_lock; | |
333 | int poll_owner; | |
334 | #endif | |
335 | ||
336 | unsigned int gro_count; | |
337 | ||
338 | struct net_device *dev; | |
339 | struct list_head dev_list; | |
340 | struct sk_buff *gro_list; | |
341 | struct sk_buff *skb; | |
342 | }; | |
343 | ||
344 | enum | |
345 | { | |
346 | NAPI_STATE_SCHED, /* Poll is scheduled */ | |
347 | NAPI_STATE_DISABLE, /* Disable pending */ | |
348 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ | |
349 | }; | |
350 | ||
351 | enum { | |
352 | GRO_MERGED, | |
353 | GRO_MERGED_FREE, | |
354 | GRO_HELD, | |
355 | GRO_NORMAL, | |
356 | GRO_DROP, | |
357 | }; | |
358 | ||
359 | extern void __napi_schedule(struct napi_struct *n); | |
360 | ||
361 | static inline int napi_disable_pending(struct napi_struct *n) | |
362 | { | |
363 | return test_bit(NAPI_STATE_DISABLE, &n->state); | |
364 | } | |
365 | ||
366 | /** | |
367 | * napi_schedule_prep - check if napi can be scheduled | |
368 | * @n: napi context | |
369 | * | |
370 | * Test if NAPI routine is already running, and if not mark | |
371 | * it as running. This is used as a condition variable | |
372 | * insure only one NAPI poll instance runs. We also make | |
373 | * sure there is no pending NAPI disable. | |
374 | */ | |
375 | static inline int napi_schedule_prep(struct napi_struct *n) | |
376 | { | |
377 | return !napi_disable_pending(n) && | |
378 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); | |
379 | } | |
380 | ||
381 | /** | |
382 | * napi_schedule - schedule NAPI poll | |
383 | * @n: napi context | |
384 | * | |
385 | * Schedule NAPI poll routine to be called if it is not already | |
386 | * running. | |
387 | */ | |
388 | static inline void napi_schedule(struct napi_struct *n) | |
389 | { | |
390 | if (napi_schedule_prep(n)) | |
391 | __napi_schedule(n); | |
392 | } | |
393 | ||
394 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ | |
395 | static inline int napi_reschedule(struct napi_struct *napi) | |
396 | { | |
397 | if (napi_schedule_prep(napi)) { | |
398 | __napi_schedule(napi); | |
399 | return 1; | |
400 | } | |
401 | return 0; | |
402 | } | |
403 | ||
404 | /** | |
405 | * napi_complete - NAPI processing complete | |
406 | * @n: napi context | |
407 | * | |
408 | * Mark NAPI processing as complete. | |
409 | */ | |
410 | extern void __napi_complete(struct napi_struct *n); | |
411 | extern void napi_complete(struct napi_struct *n); | |
412 | ||
413 | /** | |
414 | * napi_disable - prevent NAPI from scheduling | |
415 | * @n: napi context | |
416 | * | |
417 | * Stop NAPI from being scheduled on this context. | |
418 | * Waits till any outstanding processing completes. | |
419 | */ | |
420 | static inline void napi_disable(struct napi_struct *n) | |
421 | { | |
422 | set_bit(NAPI_STATE_DISABLE, &n->state); | |
423 | while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) | |
424 | msleep(1); | |
425 | clear_bit(NAPI_STATE_DISABLE, &n->state); | |
426 | } | |
427 | ||
428 | /** | |
429 | * napi_enable - enable NAPI scheduling | |
430 | * @n: napi context | |
431 | * | |
432 | * Resume NAPI from being scheduled on this context. | |
433 | * Must be paired with napi_disable. | |
434 | */ | |
435 | static inline void napi_enable(struct napi_struct *n) | |
436 | { | |
437 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
438 | smp_mb__before_clear_bit(); | |
439 | clear_bit(NAPI_STATE_SCHED, &n->state); | |
440 | } | |
441 | ||
442 | #ifdef CONFIG_SMP | |
443 | /** | |
444 | * napi_synchronize - wait until NAPI is not running | |
445 | * @n: napi context | |
446 | * | |
447 | * Wait until NAPI is done being scheduled on this context. | |
448 | * Waits till any outstanding processing completes but | |
449 | * does not disable future activations. | |
450 | */ | |
451 | static inline void napi_synchronize(const struct napi_struct *n) | |
452 | { | |
453 | while (test_bit(NAPI_STATE_SCHED, &n->state)) | |
454 | msleep(1); | |
455 | } | |
456 | #else | |
457 | # define napi_synchronize(n) barrier() | |
458 | #endif | |
459 | ||
460 | enum netdev_queue_state_t | |
461 | { | |
462 | __QUEUE_STATE_XOFF, | |
463 | __QUEUE_STATE_FROZEN, | |
464 | }; | |
465 | ||
466 | struct netdev_queue { | |
467 | /* | |
468 | * read mostly part | |
469 | */ | |
470 | struct net_device *dev; | |
471 | struct Qdisc *qdisc; | |
472 | unsigned long state; | |
473 | struct Qdisc *qdisc_sleeping; | |
474 | /* | |
475 | * write mostly part | |
476 | */ | |
477 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; | |
478 | int xmit_lock_owner; | |
479 | /* | |
480 | * please use this field instead of dev->trans_start | |
481 | */ | |
482 | unsigned long trans_start; | |
483 | unsigned long tx_bytes; | |
484 | unsigned long tx_packets; | |
485 | unsigned long tx_dropped; | |
486 | } ____cacheline_aligned_in_smp; | |
487 | ||
488 | ||
489 | /* | |
490 | * This structure defines the management hooks for network devices. | |
491 | * The following hooks can be defined; unless noted otherwise, they are | |
492 | * optional and can be filled with a null pointer. | |
493 | * | |
494 | * int (*ndo_init)(struct net_device *dev); | |
495 | * This function is called once when network device is registered. | |
496 | * The network device can use this to any late stage initializaton | |
497 | * or semantic validattion. It can fail with an error code which will | |
498 | * be propogated back to register_netdev | |
499 | * | |
500 | * void (*ndo_uninit)(struct net_device *dev); | |
501 | * This function is called when device is unregistered or when registration | |
502 | * fails. It is not called if init fails. | |
503 | * | |
504 | * int (*ndo_open)(struct net_device *dev); | |
505 | * This function is called when network device transistions to the up | |
506 | * state. | |
507 | * | |
508 | * int (*ndo_stop)(struct net_device *dev); | |
509 | * This function is called when network device transistions to the down | |
510 | * state. | |
511 | * | |
512 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, | |
513 | * struct net_device *dev); | |
514 | * Called when a packet needs to be transmitted. | |
515 | * Must return NETDEV_TX_OK , NETDEV_TX_BUSY. | |
516 | * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX) | |
517 | * Required can not be NULL. | |
518 | * | |
519 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb); | |
520 | * Called to decide which queue to when device supports multiple | |
521 | * transmit queues. | |
522 | * | |
523 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); | |
524 | * This function is called to allow device receiver to make | |
525 | * changes to configuration when multicast or promiscious is enabled. | |
526 | * | |
527 | * void (*ndo_set_rx_mode)(struct net_device *dev); | |
528 | * This function is called device changes address list filtering. | |
529 | * | |
530 | * void (*ndo_set_multicast_list)(struct net_device *dev); | |
531 | * This function is called when the multicast address list changes. | |
532 | * | |
533 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); | |
534 | * This function is called when the Media Access Control address | |
535 | * needs to be changed. If this interface is not defined, the | |
536 | * mac address can not be changed. | |
537 | * | |
538 | * int (*ndo_validate_addr)(struct net_device *dev); | |
539 | * Test if Media Access Control address is valid for the device. | |
540 | * | |
541 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); | |
542 | * Called when a user request an ioctl which can't be handled by | |
543 | * the generic interface code. If not defined ioctl's return | |
544 | * not supported error code. | |
545 | * | |
546 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); | |
547 | * Used to set network devices bus interface parameters. This interface | |
548 | * is retained for legacy reason, new devices should use the bus | |
549 | * interface (PCI) for low level management. | |
550 | * | |
551 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); | |
552 | * Called when a user wants to change the Maximum Transfer Unit | |
553 | * of a device. If not defined, any request to change MTU will | |
554 | * will return an error. | |
555 | * | |
556 | * void (*ndo_tx_timeout)(struct net_device *dev); | |
557 | * Callback uses when the transmitter has not made any progress | |
558 | * for dev->watchdog ticks. | |
559 | * | |
560 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); | |
561 | * Called when a user wants to get the network device usage | |
562 | * statistics. If not defined, the counters in dev->stats will | |
563 | * be used. | |
564 | * | |
565 | * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp); | |
566 | * If device support VLAN receive accleration | |
567 | * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called | |
568 | * when vlan groups for the device changes. Note: grp is NULL | |
569 | * if no vlan's groups are being used. | |
570 | * | |
571 | * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid); | |
572 | * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) | |
573 | * this function is called when a VLAN id is registered. | |
574 | * | |
575 | * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); | |
576 | * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) | |
577 | * this function is called when a VLAN id is unregistered. | |
578 | * | |
579 | * void (*ndo_poll_controller)(struct net_device *dev); | |
580 | */ | |
581 | #define HAVE_NET_DEVICE_OPS | |
582 | struct net_device_ops { | |
583 | int (*ndo_init)(struct net_device *dev); | |
584 | void (*ndo_uninit)(struct net_device *dev); | |
585 | int (*ndo_open)(struct net_device *dev); | |
586 | int (*ndo_stop)(struct net_device *dev); | |
587 | netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb, | |
588 | struct net_device *dev); | |
589 | u16 (*ndo_select_queue)(struct net_device *dev, | |
590 | struct sk_buff *skb); | |
591 | #define HAVE_CHANGE_RX_FLAGS | |
592 | void (*ndo_change_rx_flags)(struct net_device *dev, | |
593 | int flags); | |
594 | #define HAVE_SET_RX_MODE | |
595 | void (*ndo_set_rx_mode)(struct net_device *dev); | |
596 | #define HAVE_MULTICAST | |
597 | void (*ndo_set_multicast_list)(struct net_device *dev); | |
598 | #define HAVE_SET_MAC_ADDR | |
599 | int (*ndo_set_mac_address)(struct net_device *dev, | |
600 | void *addr); | |
601 | #define HAVE_VALIDATE_ADDR | |
602 | int (*ndo_validate_addr)(struct net_device *dev); | |
603 | #define HAVE_PRIVATE_IOCTL | |
604 | int (*ndo_do_ioctl)(struct net_device *dev, | |
605 | struct ifreq *ifr, int cmd); | |
606 | #define HAVE_SET_CONFIG | |
607 | int (*ndo_set_config)(struct net_device *dev, | |
608 | struct ifmap *map); | |
609 | #define HAVE_CHANGE_MTU | |
610 | int (*ndo_change_mtu)(struct net_device *dev, | |
611 | int new_mtu); | |
612 | int (*ndo_neigh_setup)(struct net_device *dev, | |
613 | struct neigh_parms *); | |
614 | #define HAVE_TX_TIMEOUT | |
615 | void (*ndo_tx_timeout) (struct net_device *dev); | |
616 | ||
617 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); | |
618 | ||
619 | void (*ndo_vlan_rx_register)(struct net_device *dev, | |
620 | struct vlan_group *grp); | |
621 | void (*ndo_vlan_rx_add_vid)(struct net_device *dev, | |
622 | unsigned short vid); | |
623 | void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, | |
624 | unsigned short vid); | |
625 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
626 | #define HAVE_NETDEV_POLL | |
627 | void (*ndo_poll_controller)(struct net_device *dev); | |
628 | #endif | |
629 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) | |
630 | int (*ndo_fcoe_enable)(struct net_device *dev); | |
631 | int (*ndo_fcoe_disable)(struct net_device *dev); | |
632 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, | |
633 | u16 xid, | |
634 | struct scatterlist *sgl, | |
635 | unsigned int sgc); | |
636 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, | |
637 | u16 xid); | |
638 | #endif | |
639 | }; | |
640 | ||
641 | /* | |
642 | * The DEVICE structure. | |
643 | * Actually, this whole structure is a big mistake. It mixes I/O | |
644 | * data with strictly "high-level" data, and it has to know about | |
645 | * almost every data structure used in the INET module. | |
646 | * | |
647 | * FIXME: cleanup struct net_device such that network protocol info | |
648 | * moves out. | |
649 | */ | |
650 | ||
651 | struct net_device | |
652 | { | |
653 | ||
654 | /* | |
655 | * This is the first field of the "visible" part of this structure | |
656 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
657 | * the interface. | |
658 | */ | |
659 | char name[IFNAMSIZ]; | |
660 | /* device name hash chain */ | |
661 | struct hlist_node name_hlist; | |
662 | /* snmp alias */ | |
663 | char *ifalias; | |
664 | ||
665 | /* | |
666 | * I/O specific fields | |
667 | * FIXME: Merge these and struct ifmap into one | |
668 | */ | |
669 | unsigned long mem_end; /* shared mem end */ | |
670 | unsigned long mem_start; /* shared mem start */ | |
671 | unsigned long base_addr; /* device I/O address */ | |
672 | unsigned int irq; /* device IRQ number */ | |
673 | ||
674 | /* | |
675 | * Some hardware also needs these fields, but they are not | |
676 | * part of the usual set specified in Space.c. | |
677 | */ | |
678 | ||
679 | unsigned char if_port; /* Selectable AUI, TP,..*/ | |
680 | unsigned char dma; /* DMA channel */ | |
681 | ||
682 | unsigned long state; | |
683 | ||
684 | struct list_head dev_list; | |
685 | struct list_head napi_list; | |
686 | struct list_head unreg_list; | |
687 | ||
688 | /* Net device features */ | |
689 | unsigned long features; | |
690 | #define NETIF_F_SG 1 /* Scatter/gather IO. */ | |
691 | #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ | |
692 | #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ | |
693 | #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ | |
694 | #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ | |
695 | #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ | |
696 | #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ | |
697 | #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ | |
698 | #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ | |
699 | #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ | |
700 | #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ | |
701 | #define NETIF_F_GSO 2048 /* Enable software GSO. */ | |
702 | #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ | |
703 | /* do not use LLTX in new drivers */ | |
704 | #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ | |
705 | #define NETIF_F_GRO 16384 /* Generic receive offload */ | |
706 | #define NETIF_F_LRO 32768 /* large receive offload */ | |
707 | ||
708 | /* the GSO_MASK reserves bits 16 through 23 */ | |
709 | #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */ | |
710 | #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */ | |
711 | #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/ | |
712 | ||
713 | /* Segmentation offload features */ | |
714 | #define NETIF_F_GSO_SHIFT 16 | |
715 | #define NETIF_F_GSO_MASK 0x00ff0000 | |
716 | #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) | |
717 | #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) | |
718 | #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) | |
719 | #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) | |
720 | #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) | |
721 | #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT) | |
722 | ||
723 | /* List of features with software fallbacks. */ | |
724 | #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) | |
725 | ||
726 | ||
727 | #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) | |
728 | #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) | |
729 | #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) | |
730 | #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) | |
731 | ||
732 | /* | |
733 | * If one device supports one of these features, then enable them | |
734 | * for all in netdev_increment_features. | |
735 | */ | |
736 | #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \ | |
737 | NETIF_F_SG | NETIF_F_HIGHDMA | \ | |
738 | NETIF_F_FRAGLIST) | |
739 | ||
740 | /* Interface index. Unique device identifier */ | |
741 | int ifindex; | |
742 | int iflink; | |
743 | ||
744 | struct net_device_stats stats; | |
745 | ||
746 | #ifdef CONFIG_WIRELESS_EXT | |
747 | /* List of functions to handle Wireless Extensions (instead of ioctl). | |
748 | * See <net/iw_handler.h> for details. Jean II */ | |
749 | const struct iw_handler_def * wireless_handlers; | |
750 | /* Instance data managed by the core of Wireless Extensions. */ | |
751 | struct iw_public_data * wireless_data; | |
752 | #endif | |
753 | /* Management operations */ | |
754 | const struct net_device_ops *netdev_ops; | |
755 | const struct ethtool_ops *ethtool_ops; | |
756 | ||
757 | /* Hardware header description */ | |
758 | const struct header_ops *header_ops; | |
759 | ||
760 | unsigned int flags; /* interface flags (a la BSD) */ | |
761 | unsigned short gflags; | |
762 | unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ | |
763 | unsigned short padded; /* How much padding added by alloc_netdev() */ | |
764 | ||
765 | unsigned char operstate; /* RFC2863 operstate */ | |
766 | unsigned char link_mode; /* mapping policy to operstate */ | |
767 | ||
768 | unsigned mtu; /* interface MTU value */ | |
769 | unsigned short type; /* interface hardware type */ | |
770 | unsigned short hard_header_len; /* hardware hdr length */ | |
771 | ||
772 | /* extra head- and tailroom the hardware may need, but not in all cases | |
773 | * can this be guaranteed, especially tailroom. Some cases also use | |
774 | * LL_MAX_HEADER instead to allocate the skb. | |
775 | */ | |
776 | unsigned short needed_headroom; | |
777 | unsigned short needed_tailroom; | |
778 | ||
779 | struct net_device *master; /* Pointer to master device of a group, | |
780 | * which this device is member of. | |
781 | */ | |
782 | ||
783 | /* Interface address info. */ | |
784 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ | |
785 | unsigned char addr_len; /* hardware address length */ | |
786 | unsigned short dev_id; /* for shared network cards */ | |
787 | ||
788 | struct netdev_hw_addr_list uc; /* Secondary unicast | |
789 | mac addresses */ | |
790 | int uc_promisc; | |
791 | spinlock_t addr_list_lock; | |
792 | struct dev_addr_list *mc_list; /* Multicast mac addresses */ | |
793 | int mc_count; /* Number of installed mcasts */ | |
794 | unsigned int promiscuity; | |
795 | unsigned int allmulti; | |
796 | ||
797 | ||
798 | /* Protocol specific pointers */ | |
799 | ||
800 | #ifdef CONFIG_NET_DSA | |
801 | void *dsa_ptr; /* dsa specific data */ | |
802 | #endif | |
803 | void *atalk_ptr; /* AppleTalk link */ | |
804 | void *ip_ptr; /* IPv4 specific data */ | |
805 | void *dn_ptr; /* DECnet specific data */ | |
806 | void *ip6_ptr; /* IPv6 specific data */ | |
807 | void *ec_ptr; /* Econet specific data */ | |
808 | void *ax25_ptr; /* AX.25 specific data */ | |
809 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, | |
810 | assign before registering */ | |
811 | ||
812 | /* | |
813 | * Cache line mostly used on receive path (including eth_type_trans()) | |
814 | */ | |
815 | unsigned long last_rx; /* Time of last Rx */ | |
816 | /* Interface address info used in eth_type_trans() */ | |
817 | unsigned char *dev_addr; /* hw address, (before bcast | |
818 | because most packets are | |
819 | unicast) */ | |
820 | ||
821 | struct netdev_hw_addr_list dev_addrs; /* list of device | |
822 | hw addresses */ | |
823 | ||
824 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ | |
825 | ||
826 | struct netdev_queue rx_queue; | |
827 | ||
828 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; | |
829 | ||
830 | /* Number of TX queues allocated at alloc_netdev_mq() time */ | |
831 | unsigned int num_tx_queues; | |
832 | ||
833 | /* Number of TX queues currently active in device */ | |
834 | unsigned int real_num_tx_queues; | |
835 | ||
836 | /* root qdisc from userspace point of view */ | |
837 | struct Qdisc *qdisc; | |
838 | ||
839 | unsigned long tx_queue_len; /* Max frames per queue allowed */ | |
840 | spinlock_t tx_global_lock; | |
841 | /* | |
842 | * One part is mostly used on xmit path (device) | |
843 | */ | |
844 | /* These may be needed for future network-power-down code. */ | |
845 | ||
846 | /* | |
847 | * trans_start here is expensive for high speed devices on SMP, | |
848 | * please use netdev_queue->trans_start instead. | |
849 | */ | |
850 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ | |
851 | ||
852 | int watchdog_timeo; /* used by dev_watchdog() */ | |
853 | struct timer_list watchdog_timer; | |
854 | ||
855 | /* Number of references to this device */ | |
856 | atomic_t refcnt ____cacheline_aligned_in_smp; | |
857 | ||
858 | /* delayed register/unregister */ | |
859 | struct list_head todo_list; | |
860 | /* device index hash chain */ | |
861 | struct hlist_node index_hlist; | |
862 | ||
863 | struct net_device *link_watch_next; | |
864 | ||
865 | /* register/unregister state machine */ | |
866 | enum { NETREG_UNINITIALIZED=0, | |
867 | NETREG_REGISTERED, /* completed register_netdevice */ | |
868 | NETREG_UNREGISTERING, /* called unregister_netdevice */ | |
869 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
870 | NETREG_RELEASED, /* called free_netdev */ | |
871 | NETREG_DUMMY, /* dummy device for NAPI poll */ | |
872 | } reg_state; | |
873 | ||
874 | /* Called from unregister, can be used to call free_netdev */ | |
875 | void (*destructor)(struct net_device *dev); | |
876 | ||
877 | #ifdef CONFIG_NETPOLL | |
878 | struct netpoll_info *npinfo; | |
879 | #endif | |
880 | ||
881 | #ifdef CONFIG_NET_NS | |
882 | /* Network namespace this network device is inside */ | |
883 | struct net *nd_net; | |
884 | #endif | |
885 | ||
886 | /* mid-layer private */ | |
887 | void *ml_priv; | |
888 | ||
889 | /* bridge stuff */ | |
890 | struct net_bridge_port *br_port; | |
891 | /* macvlan */ | |
892 | struct macvlan_port *macvlan_port; | |
893 | /* GARP */ | |
894 | struct garp_port *garp_port; | |
895 | ||
896 | /* class/net/name entry */ | |
897 | struct device dev; | |
898 | /* space for optional statistics and wireless sysfs groups */ | |
899 | const struct attribute_group *sysfs_groups[3]; | |
900 | ||
901 | /* rtnetlink link ops */ | |
902 | const struct rtnl_link_ops *rtnl_link_ops; | |
903 | ||
904 | /* VLAN feature mask */ | |
905 | unsigned long vlan_features; | |
906 | ||
907 | /* for setting kernel sock attribute on TCP connection setup */ | |
908 | #define GSO_MAX_SIZE 65536 | |
909 | unsigned int gso_max_size; | |
910 | ||
911 | #ifdef CONFIG_DCB | |
912 | /* Data Center Bridging netlink ops */ | |
913 | const struct dcbnl_rtnl_ops *dcbnl_ops; | |
914 | #endif | |
915 | ||
916 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) | |
917 | /* max exchange id for FCoE LRO by ddp */ | |
918 | unsigned int fcoe_ddp_xid; | |
919 | #endif | |
920 | }; | |
921 | #define to_net_dev(d) container_of(d, struct net_device, dev) | |
922 | ||
923 | #define NETDEV_ALIGN 32 | |
924 | ||
925 | static inline | |
926 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, | |
927 | unsigned int index) | |
928 | { | |
929 | return &dev->_tx[index]; | |
930 | } | |
931 | ||
932 | static inline void netdev_for_each_tx_queue(struct net_device *dev, | |
933 | void (*f)(struct net_device *, | |
934 | struct netdev_queue *, | |
935 | void *), | |
936 | void *arg) | |
937 | { | |
938 | unsigned int i; | |
939 | ||
940 | for (i = 0; i < dev->num_tx_queues; i++) | |
941 | f(dev, &dev->_tx[i], arg); | |
942 | } | |
943 | ||
944 | /* | |
945 | * Net namespace inlines | |
946 | */ | |
947 | static inline | |
948 | struct net *dev_net(const struct net_device *dev) | |
949 | { | |
950 | #ifdef CONFIG_NET_NS | |
951 | return dev->nd_net; | |
952 | #else | |
953 | return &init_net; | |
954 | #endif | |
955 | } | |
956 | ||
957 | static inline | |
958 | void dev_net_set(struct net_device *dev, struct net *net) | |
959 | { | |
960 | #ifdef CONFIG_NET_NS | |
961 | release_net(dev->nd_net); | |
962 | dev->nd_net = hold_net(net); | |
963 | #endif | |
964 | } | |
965 | ||
966 | static inline bool netdev_uses_dsa_tags(struct net_device *dev) | |
967 | { | |
968 | #ifdef CONFIG_NET_DSA_TAG_DSA | |
969 | if (dev->dsa_ptr != NULL) | |
970 | return dsa_uses_dsa_tags(dev->dsa_ptr); | |
971 | #endif | |
972 | ||
973 | return 0; | |
974 | } | |
975 | ||
976 | static inline bool netdev_uses_trailer_tags(struct net_device *dev) | |
977 | { | |
978 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
979 | if (dev->dsa_ptr != NULL) | |
980 | return dsa_uses_trailer_tags(dev->dsa_ptr); | |
981 | #endif | |
982 | ||
983 | return 0; | |
984 | } | |
985 | ||
986 | /** | |
987 | * netdev_priv - access network device private data | |
988 | * @dev: network device | |
989 | * | |
990 | * Get network device private data | |
991 | */ | |
992 | static inline void *netdev_priv(const struct net_device *dev) | |
993 | { | |
994 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); | |
995 | } | |
996 | ||
997 | /* Set the sysfs physical device reference for the network logical device | |
998 | * if set prior to registration will cause a symlink during initialization. | |
999 | */ | |
1000 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) | |
1001 | ||
1002 | /* Set the sysfs device type for the network logical device to allow | |
1003 | * fin grained indentification of different network device types. For | |
1004 | * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. | |
1005 | */ | |
1006 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) | |
1007 | ||
1008 | /** | |
1009 | * netif_napi_add - initialize a napi context | |
1010 | * @dev: network device | |
1011 | * @napi: napi context | |
1012 | * @poll: polling function | |
1013 | * @weight: default weight | |
1014 | * | |
1015 | * netif_napi_add() must be used to initialize a napi context prior to calling | |
1016 | * *any* of the other napi related functions. | |
1017 | */ | |
1018 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, | |
1019 | int (*poll)(struct napi_struct *, int), int weight); | |
1020 | ||
1021 | /** | |
1022 | * netif_napi_del - remove a napi context | |
1023 | * @napi: napi context | |
1024 | * | |
1025 | * netif_napi_del() removes a napi context from the network device napi list | |
1026 | */ | |
1027 | void netif_napi_del(struct napi_struct *napi); | |
1028 | ||
1029 | struct napi_gro_cb { | |
1030 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ | |
1031 | void *frag0; | |
1032 | ||
1033 | /* Length of frag0. */ | |
1034 | unsigned int frag0_len; | |
1035 | ||
1036 | /* This indicates where we are processing relative to skb->data. */ | |
1037 | int data_offset; | |
1038 | ||
1039 | /* This is non-zero if the packet may be of the same flow. */ | |
1040 | int same_flow; | |
1041 | ||
1042 | /* This is non-zero if the packet cannot be merged with the new skb. */ | |
1043 | int flush; | |
1044 | ||
1045 | /* Number of segments aggregated. */ | |
1046 | int count; | |
1047 | ||
1048 | /* Free the skb? */ | |
1049 | int free; | |
1050 | }; | |
1051 | ||
1052 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) | |
1053 | ||
1054 | struct packet_type { | |
1055 | __be16 type; /* This is really htons(ether_type). */ | |
1056 | struct net_device *dev; /* NULL is wildcarded here */ | |
1057 | int (*func) (struct sk_buff *, | |
1058 | struct net_device *, | |
1059 | struct packet_type *, | |
1060 | struct net_device *); | |
1061 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, | |
1062 | int features); | |
1063 | int (*gso_send_check)(struct sk_buff *skb); | |
1064 | struct sk_buff **(*gro_receive)(struct sk_buff **head, | |
1065 | struct sk_buff *skb); | |
1066 | int (*gro_complete)(struct sk_buff *skb); | |
1067 | void *af_packet_priv; | |
1068 | struct list_head list; | |
1069 | }; | |
1070 | ||
1071 | #include <linux/interrupt.h> | |
1072 | #include <linux/notifier.h> | |
1073 | ||
1074 | extern rwlock_t dev_base_lock; /* Device list lock */ | |
1075 | ||
1076 | ||
1077 | #define for_each_netdev(net, d) \ | |
1078 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) | |
1079 | #define for_each_netdev_safe(net, d, n) \ | |
1080 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) | |
1081 | #define for_each_netdev_continue(net, d) \ | |
1082 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) | |
1083 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) | |
1084 | ||
1085 | static inline struct net_device *next_net_device(struct net_device *dev) | |
1086 | { | |
1087 | struct list_head *lh; | |
1088 | struct net *net; | |
1089 | ||
1090 | net = dev_net(dev); | |
1091 | lh = dev->dev_list.next; | |
1092 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1093 | } | |
1094 | ||
1095 | static inline struct net_device *first_net_device(struct net *net) | |
1096 | { | |
1097 | return list_empty(&net->dev_base_head) ? NULL : | |
1098 | net_device_entry(net->dev_base_head.next); | |
1099 | } | |
1100 | ||
1101 | extern int netdev_boot_setup_check(struct net_device *dev); | |
1102 | extern unsigned long netdev_boot_base(const char *prefix, int unit); | |
1103 | extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr); | |
1104 | extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1105 | extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1106 | extern void dev_add_pack(struct packet_type *pt); | |
1107 | extern void dev_remove_pack(struct packet_type *pt); | |
1108 | extern void __dev_remove_pack(struct packet_type *pt); | |
1109 | ||
1110 | extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags, | |
1111 | unsigned short mask); | |
1112 | extern struct net_device *dev_get_by_name(struct net *net, const char *name); | |
1113 | extern struct net_device *__dev_get_by_name(struct net *net, const char *name); | |
1114 | extern int dev_alloc_name(struct net_device *dev, const char *name); | |
1115 | extern int dev_open(struct net_device *dev); | |
1116 | extern int dev_close(struct net_device *dev); | |
1117 | extern void dev_disable_lro(struct net_device *dev); | |
1118 | extern int dev_queue_xmit(struct sk_buff *skb); | |
1119 | extern int register_netdevice(struct net_device *dev); | |
1120 | extern void unregister_netdevice_queue(struct net_device *dev, | |
1121 | struct list_head *head); | |
1122 | extern void unregister_netdevice_many(struct list_head *head); | |
1123 | static inline void unregister_netdevice(struct net_device *dev) | |
1124 | { | |
1125 | unregister_netdevice_queue(dev, NULL); | |
1126 | } | |
1127 | ||
1128 | extern void free_netdev(struct net_device *dev); | |
1129 | extern void synchronize_net(void); | |
1130 | extern int register_netdevice_notifier(struct notifier_block *nb); | |
1131 | extern int unregister_netdevice_notifier(struct notifier_block *nb); | |
1132 | extern int init_dummy_netdev(struct net_device *dev); | |
1133 | extern void netdev_resync_ops(struct net_device *dev); | |
1134 | ||
1135 | extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); | |
1136 | extern struct net_device *dev_get_by_index(struct net *net, int ifindex); | |
1137 | extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); | |
1138 | extern int dev_restart(struct net_device *dev); | |
1139 | #ifdef CONFIG_NETPOLL_TRAP | |
1140 | extern int netpoll_trap(void); | |
1141 | #endif | |
1142 | extern int skb_gro_receive(struct sk_buff **head, | |
1143 | struct sk_buff *skb); | |
1144 | extern void skb_gro_reset_offset(struct sk_buff *skb); | |
1145 | ||
1146 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) | |
1147 | { | |
1148 | return NAPI_GRO_CB(skb)->data_offset; | |
1149 | } | |
1150 | ||
1151 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) | |
1152 | { | |
1153 | return skb->len - NAPI_GRO_CB(skb)->data_offset; | |
1154 | } | |
1155 | ||
1156 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) | |
1157 | { | |
1158 | NAPI_GRO_CB(skb)->data_offset += len; | |
1159 | } | |
1160 | ||
1161 | static inline void *skb_gro_header_fast(struct sk_buff *skb, | |
1162 | unsigned int offset) | |
1163 | { | |
1164 | return NAPI_GRO_CB(skb)->frag0 + offset; | |
1165 | } | |
1166 | ||
1167 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) | |
1168 | { | |
1169 | return NAPI_GRO_CB(skb)->frag0_len < hlen; | |
1170 | } | |
1171 | ||
1172 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, | |
1173 | unsigned int offset) | |
1174 | { | |
1175 | NAPI_GRO_CB(skb)->frag0 = NULL; | |
1176 | NAPI_GRO_CB(skb)->frag0_len = 0; | |
1177 | return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL; | |
1178 | } | |
1179 | ||
1180 | static inline void *skb_gro_mac_header(struct sk_buff *skb) | |
1181 | { | |
1182 | return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb); | |
1183 | } | |
1184 | ||
1185 | static inline void *skb_gro_network_header(struct sk_buff *skb) | |
1186 | { | |
1187 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + | |
1188 | skb_network_offset(skb); | |
1189 | } | |
1190 | ||
1191 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, | |
1192 | unsigned short type, | |
1193 | const void *daddr, const void *saddr, | |
1194 | unsigned len) | |
1195 | { | |
1196 | if (!dev->header_ops || !dev->header_ops->create) | |
1197 | return 0; | |
1198 | ||
1199 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); | |
1200 | } | |
1201 | ||
1202 | static inline int dev_parse_header(const struct sk_buff *skb, | |
1203 | unsigned char *haddr) | |
1204 | { | |
1205 | const struct net_device *dev = skb->dev; | |
1206 | ||
1207 | if (!dev->header_ops || !dev->header_ops->parse) | |
1208 | return 0; | |
1209 | return dev->header_ops->parse(skb, haddr); | |
1210 | } | |
1211 | ||
1212 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); | |
1213 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); | |
1214 | static inline int unregister_gifconf(unsigned int family) | |
1215 | { | |
1216 | return register_gifconf(family, NULL); | |
1217 | } | |
1218 | ||
1219 | /* | |
1220 | * Incoming packets are placed on per-cpu queues so that | |
1221 | * no locking is needed. | |
1222 | */ | |
1223 | struct softnet_data | |
1224 | { | |
1225 | struct Qdisc *output_queue; | |
1226 | struct sk_buff_head input_pkt_queue; | |
1227 | struct list_head poll_list; | |
1228 | struct sk_buff *completion_queue; | |
1229 | ||
1230 | struct napi_struct backlog; | |
1231 | }; | |
1232 | ||
1233 | DECLARE_PER_CPU(struct softnet_data,softnet_data); | |
1234 | ||
1235 | #define HAVE_NETIF_QUEUE | |
1236 | ||
1237 | extern void __netif_schedule(struct Qdisc *q); | |
1238 | ||
1239 | static inline void netif_schedule_queue(struct netdev_queue *txq) | |
1240 | { | |
1241 | if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) | |
1242 | __netif_schedule(txq->qdisc); | |
1243 | } | |
1244 | ||
1245 | static inline void netif_tx_schedule_all(struct net_device *dev) | |
1246 | { | |
1247 | unsigned int i; | |
1248 | ||
1249 | for (i = 0; i < dev->num_tx_queues; i++) | |
1250 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); | |
1251 | } | |
1252 | ||
1253 | static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) | |
1254 | { | |
1255 | clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1256 | } | |
1257 | ||
1258 | /** | |
1259 | * netif_start_queue - allow transmit | |
1260 | * @dev: network device | |
1261 | * | |
1262 | * Allow upper layers to call the device hard_start_xmit routine. | |
1263 | */ | |
1264 | static inline void netif_start_queue(struct net_device *dev) | |
1265 | { | |
1266 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); | |
1267 | } | |
1268 | ||
1269 | static inline void netif_tx_start_all_queues(struct net_device *dev) | |
1270 | { | |
1271 | unsigned int i; | |
1272 | ||
1273 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1274 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1275 | netif_tx_start_queue(txq); | |
1276 | } | |
1277 | } | |
1278 | ||
1279 | static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) | |
1280 | { | |
1281 | #ifdef CONFIG_NETPOLL_TRAP | |
1282 | if (netpoll_trap()) { | |
1283 | netif_tx_start_queue(dev_queue); | |
1284 | return; | |
1285 | } | |
1286 | #endif | |
1287 | if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state)) | |
1288 | __netif_schedule(dev_queue->qdisc); | |
1289 | } | |
1290 | ||
1291 | /** | |
1292 | * netif_wake_queue - restart transmit | |
1293 | * @dev: network device | |
1294 | * | |
1295 | * Allow upper layers to call the device hard_start_xmit routine. | |
1296 | * Used for flow control when transmit resources are available. | |
1297 | */ | |
1298 | static inline void netif_wake_queue(struct net_device *dev) | |
1299 | { | |
1300 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); | |
1301 | } | |
1302 | ||
1303 | static inline void netif_tx_wake_all_queues(struct net_device *dev) | |
1304 | { | |
1305 | unsigned int i; | |
1306 | ||
1307 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1308 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1309 | netif_tx_wake_queue(txq); | |
1310 | } | |
1311 | } | |
1312 | ||
1313 | static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) | |
1314 | { | |
1315 | set_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1316 | } | |
1317 | ||
1318 | /** | |
1319 | * netif_stop_queue - stop transmitted packets | |
1320 | * @dev: network device | |
1321 | * | |
1322 | * Stop upper layers calling the device hard_start_xmit routine. | |
1323 | * Used for flow control when transmit resources are unavailable. | |
1324 | */ | |
1325 | static inline void netif_stop_queue(struct net_device *dev) | |
1326 | { | |
1327 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); | |
1328 | } | |
1329 | ||
1330 | static inline void netif_tx_stop_all_queues(struct net_device *dev) | |
1331 | { | |
1332 | unsigned int i; | |
1333 | ||
1334 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1335 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1336 | netif_tx_stop_queue(txq); | |
1337 | } | |
1338 | } | |
1339 | ||
1340 | static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue) | |
1341 | { | |
1342 | return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1343 | } | |
1344 | ||
1345 | /** | |
1346 | * netif_queue_stopped - test if transmit queue is flowblocked | |
1347 | * @dev: network device | |
1348 | * | |
1349 | * Test if transmit queue on device is currently unable to send. | |
1350 | */ | |
1351 | static inline int netif_queue_stopped(const struct net_device *dev) | |
1352 | { | |
1353 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); | |
1354 | } | |
1355 | ||
1356 | static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue) | |
1357 | { | |
1358 | return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state); | |
1359 | } | |
1360 | ||
1361 | /** | |
1362 | * netif_running - test if up | |
1363 | * @dev: network device | |
1364 | * | |
1365 | * Test if the device has been brought up. | |
1366 | */ | |
1367 | static inline int netif_running(const struct net_device *dev) | |
1368 | { | |
1369 | return test_bit(__LINK_STATE_START, &dev->state); | |
1370 | } | |
1371 | ||
1372 | /* | |
1373 | * Routines to manage the subqueues on a device. We only need start | |
1374 | * stop, and a check if it's stopped. All other device management is | |
1375 | * done at the overall netdevice level. | |
1376 | * Also test the device if we're multiqueue. | |
1377 | */ | |
1378 | ||
1379 | /** | |
1380 | * netif_start_subqueue - allow sending packets on subqueue | |
1381 | * @dev: network device | |
1382 | * @queue_index: sub queue index | |
1383 | * | |
1384 | * Start individual transmit queue of a device with multiple transmit queues. | |
1385 | */ | |
1386 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) | |
1387 | { | |
1388 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); | |
1389 | ||
1390 | netif_tx_start_queue(txq); | |
1391 | } | |
1392 | ||
1393 | /** | |
1394 | * netif_stop_subqueue - stop sending packets on subqueue | |
1395 | * @dev: network device | |
1396 | * @queue_index: sub queue index | |
1397 | * | |
1398 | * Stop individual transmit queue of a device with multiple transmit queues. | |
1399 | */ | |
1400 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) | |
1401 | { | |
1402 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); | |
1403 | #ifdef CONFIG_NETPOLL_TRAP | |
1404 | if (netpoll_trap()) | |
1405 | return; | |
1406 | #endif | |
1407 | netif_tx_stop_queue(txq); | |
1408 | } | |
1409 | ||
1410 | /** | |
1411 | * netif_subqueue_stopped - test status of subqueue | |
1412 | * @dev: network device | |
1413 | * @queue_index: sub queue index | |
1414 | * | |
1415 | * Check individual transmit queue of a device with multiple transmit queues. | |
1416 | */ | |
1417 | static inline int __netif_subqueue_stopped(const struct net_device *dev, | |
1418 | u16 queue_index) | |
1419 | { | |
1420 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); | |
1421 | ||
1422 | return netif_tx_queue_stopped(txq); | |
1423 | } | |
1424 | ||
1425 | static inline int netif_subqueue_stopped(const struct net_device *dev, | |
1426 | struct sk_buff *skb) | |
1427 | { | |
1428 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); | |
1429 | } | |
1430 | ||
1431 | /** | |
1432 | * netif_wake_subqueue - allow sending packets on subqueue | |
1433 | * @dev: network device | |
1434 | * @queue_index: sub queue index | |
1435 | * | |
1436 | * Resume individual transmit queue of a device with multiple transmit queues. | |
1437 | */ | |
1438 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) | |
1439 | { | |
1440 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); | |
1441 | #ifdef CONFIG_NETPOLL_TRAP | |
1442 | if (netpoll_trap()) | |
1443 | return; | |
1444 | #endif | |
1445 | if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state)) | |
1446 | __netif_schedule(txq->qdisc); | |
1447 | } | |
1448 | ||
1449 | /** | |
1450 | * netif_is_multiqueue - test if device has multiple transmit queues | |
1451 | * @dev: network device | |
1452 | * | |
1453 | * Check if device has multiple transmit queues | |
1454 | */ | |
1455 | static inline int netif_is_multiqueue(const struct net_device *dev) | |
1456 | { | |
1457 | return (dev->num_tx_queues > 1); | |
1458 | } | |
1459 | ||
1460 | /* Use this variant when it is known for sure that it | |
1461 | * is executing from hardware interrupt context or with hardware interrupts | |
1462 | * disabled. | |
1463 | */ | |
1464 | extern void dev_kfree_skb_irq(struct sk_buff *skb); | |
1465 | ||
1466 | /* Use this variant in places where it could be invoked | |
1467 | * from either hardware interrupt or other context, with hardware interrupts | |
1468 | * either disabled or enabled. | |
1469 | */ | |
1470 | extern void dev_kfree_skb_any(struct sk_buff *skb); | |
1471 | ||
1472 | #define HAVE_NETIF_RX 1 | |
1473 | extern int netif_rx(struct sk_buff *skb); | |
1474 | extern int netif_rx_ni(struct sk_buff *skb); | |
1475 | #define HAVE_NETIF_RECEIVE_SKB 1 | |
1476 | extern int netif_receive_skb(struct sk_buff *skb); | |
1477 | extern void napi_gro_flush(struct napi_struct *napi); | |
1478 | extern int dev_gro_receive(struct napi_struct *napi, | |
1479 | struct sk_buff *skb); | |
1480 | extern int napi_skb_finish(int ret, struct sk_buff *skb); | |
1481 | extern int napi_gro_receive(struct napi_struct *napi, | |
1482 | struct sk_buff *skb); | |
1483 | extern void napi_reuse_skb(struct napi_struct *napi, | |
1484 | struct sk_buff *skb); | |
1485 | extern struct sk_buff * napi_get_frags(struct napi_struct *napi); | |
1486 | extern int napi_frags_finish(struct napi_struct *napi, | |
1487 | struct sk_buff *skb, int ret); | |
1488 | extern struct sk_buff * napi_frags_skb(struct napi_struct *napi); | |
1489 | extern int napi_gro_frags(struct napi_struct *napi); | |
1490 | ||
1491 | static inline void napi_free_frags(struct napi_struct *napi) | |
1492 | { | |
1493 | kfree_skb(napi->skb); | |
1494 | napi->skb = NULL; | |
1495 | } | |
1496 | ||
1497 | extern void netif_nit_deliver(struct sk_buff *skb); | |
1498 | extern int dev_valid_name(const char *name); | |
1499 | extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); | |
1500 | extern int dev_ethtool(struct net *net, struct ifreq *); | |
1501 | extern unsigned dev_get_flags(const struct net_device *); | |
1502 | extern int dev_change_flags(struct net_device *, unsigned); | |
1503 | extern int dev_change_name(struct net_device *, const char *); | |
1504 | extern int dev_set_alias(struct net_device *, const char *, size_t); | |
1505 | extern int dev_change_net_namespace(struct net_device *, | |
1506 | struct net *, const char *); | |
1507 | extern int dev_set_mtu(struct net_device *, int); | |
1508 | extern int dev_set_mac_address(struct net_device *, | |
1509 | struct sockaddr *); | |
1510 | extern int dev_hard_start_xmit(struct sk_buff *skb, | |
1511 | struct net_device *dev, | |
1512 | struct netdev_queue *txq); | |
1513 | ||
1514 | extern int netdev_budget; | |
1515 | ||
1516 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
1517 | extern void netdev_run_todo(void); | |
1518 | ||
1519 | /** | |
1520 | * dev_put - release reference to device | |
1521 | * @dev: network device | |
1522 | * | |
1523 | * Release reference to device to allow it to be freed. | |
1524 | */ | |
1525 | static inline void dev_put(struct net_device *dev) | |
1526 | { | |
1527 | atomic_dec(&dev->refcnt); | |
1528 | } | |
1529 | ||
1530 | /** | |
1531 | * dev_hold - get reference to device | |
1532 | * @dev: network device | |
1533 | * | |
1534 | * Hold reference to device to keep it from being freed. | |
1535 | */ | |
1536 | static inline void dev_hold(struct net_device *dev) | |
1537 | { | |
1538 | atomic_inc(&dev->refcnt); | |
1539 | } | |
1540 | ||
1541 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
1542 | * and _off may be called from IRQ context, but it is caller | |
1543 | * who is responsible for serialization of these calls. | |
1544 | * | |
1545 | * The name carrier is inappropriate, these functions should really be | |
1546 | * called netif_lowerlayer_*() because they represent the state of any | |
1547 | * kind of lower layer not just hardware media. | |
1548 | */ | |
1549 | ||
1550 | extern void linkwatch_fire_event(struct net_device *dev); | |
1551 | ||
1552 | /** | |
1553 | * netif_carrier_ok - test if carrier present | |
1554 | * @dev: network device | |
1555 | * | |
1556 | * Check if carrier is present on device | |
1557 | */ | |
1558 | static inline int netif_carrier_ok(const struct net_device *dev) | |
1559 | { | |
1560 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
1561 | } | |
1562 | ||
1563 | extern unsigned long dev_trans_start(struct net_device *dev); | |
1564 | ||
1565 | extern void __netdev_watchdog_up(struct net_device *dev); | |
1566 | ||
1567 | extern void netif_carrier_on(struct net_device *dev); | |
1568 | ||
1569 | extern void netif_carrier_off(struct net_device *dev); | |
1570 | ||
1571 | /** | |
1572 | * netif_dormant_on - mark device as dormant. | |
1573 | * @dev: network device | |
1574 | * | |
1575 | * Mark device as dormant (as per RFC2863). | |
1576 | * | |
1577 | * The dormant state indicates that the relevant interface is not | |
1578 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
1579 | * in a "pending" state, waiting for some external event. For "on- | |
1580 | * demand" interfaces, this new state identifies the situation where the | |
1581 | * interface is waiting for events to place it in the up state. | |
1582 | * | |
1583 | */ | |
1584 | static inline void netif_dormant_on(struct net_device *dev) | |
1585 | { | |
1586 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
1587 | linkwatch_fire_event(dev); | |
1588 | } | |
1589 | ||
1590 | /** | |
1591 | * netif_dormant_off - set device as not dormant. | |
1592 | * @dev: network device | |
1593 | * | |
1594 | * Device is not in dormant state. | |
1595 | */ | |
1596 | static inline void netif_dormant_off(struct net_device *dev) | |
1597 | { | |
1598 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
1599 | linkwatch_fire_event(dev); | |
1600 | } | |
1601 | ||
1602 | /** | |
1603 | * netif_dormant - test if carrier present | |
1604 | * @dev: network device | |
1605 | * | |
1606 | * Check if carrier is present on device | |
1607 | */ | |
1608 | static inline int netif_dormant(const struct net_device *dev) | |
1609 | { | |
1610 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
1611 | } | |
1612 | ||
1613 | ||
1614 | /** | |
1615 | * netif_oper_up - test if device is operational | |
1616 | * @dev: network device | |
1617 | * | |
1618 | * Check if carrier is operational | |
1619 | */ | |
1620 | static inline int netif_oper_up(const struct net_device *dev) { | |
1621 | return (dev->operstate == IF_OPER_UP || | |
1622 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
1623 | } | |
1624 | ||
1625 | /** | |
1626 | * netif_device_present - is device available or removed | |
1627 | * @dev: network device | |
1628 | * | |
1629 | * Check if device has not been removed from system. | |
1630 | */ | |
1631 | static inline int netif_device_present(struct net_device *dev) | |
1632 | { | |
1633 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
1634 | } | |
1635 | ||
1636 | extern void netif_device_detach(struct net_device *dev); | |
1637 | ||
1638 | extern void netif_device_attach(struct net_device *dev); | |
1639 | ||
1640 | /* | |
1641 | * Network interface message level settings | |
1642 | */ | |
1643 | #define HAVE_NETIF_MSG 1 | |
1644 | ||
1645 | enum { | |
1646 | NETIF_MSG_DRV = 0x0001, | |
1647 | NETIF_MSG_PROBE = 0x0002, | |
1648 | NETIF_MSG_LINK = 0x0004, | |
1649 | NETIF_MSG_TIMER = 0x0008, | |
1650 | NETIF_MSG_IFDOWN = 0x0010, | |
1651 | NETIF_MSG_IFUP = 0x0020, | |
1652 | NETIF_MSG_RX_ERR = 0x0040, | |
1653 | NETIF_MSG_TX_ERR = 0x0080, | |
1654 | NETIF_MSG_TX_QUEUED = 0x0100, | |
1655 | NETIF_MSG_INTR = 0x0200, | |
1656 | NETIF_MSG_TX_DONE = 0x0400, | |
1657 | NETIF_MSG_RX_STATUS = 0x0800, | |
1658 | NETIF_MSG_PKTDATA = 0x1000, | |
1659 | NETIF_MSG_HW = 0x2000, | |
1660 | NETIF_MSG_WOL = 0x4000, | |
1661 | }; | |
1662 | ||
1663 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
1664 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
1665 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
1666 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
1667 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
1668 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
1669 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
1670 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
1671 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
1672 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
1673 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
1674 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
1675 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
1676 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
1677 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
1678 | ||
1679 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
1680 | { | |
1681 | /* use default */ | |
1682 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
1683 | return default_msg_enable_bits; | |
1684 | if (debug_value == 0) /* no output */ | |
1685 | return 0; | |
1686 | /* set low N bits */ | |
1687 | return (1 << debug_value) - 1; | |
1688 | } | |
1689 | ||
1690 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) | |
1691 | { | |
1692 | spin_lock(&txq->_xmit_lock); | |
1693 | txq->xmit_lock_owner = cpu; | |
1694 | } | |
1695 | ||
1696 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) | |
1697 | { | |
1698 | spin_lock_bh(&txq->_xmit_lock); | |
1699 | txq->xmit_lock_owner = smp_processor_id(); | |
1700 | } | |
1701 | ||
1702 | static inline int __netif_tx_trylock(struct netdev_queue *txq) | |
1703 | { | |
1704 | int ok = spin_trylock(&txq->_xmit_lock); | |
1705 | if (likely(ok)) | |
1706 | txq->xmit_lock_owner = smp_processor_id(); | |
1707 | return ok; | |
1708 | } | |
1709 | ||
1710 | static inline void __netif_tx_unlock(struct netdev_queue *txq) | |
1711 | { | |
1712 | txq->xmit_lock_owner = -1; | |
1713 | spin_unlock(&txq->_xmit_lock); | |
1714 | } | |
1715 | ||
1716 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) | |
1717 | { | |
1718 | txq->xmit_lock_owner = -1; | |
1719 | spin_unlock_bh(&txq->_xmit_lock); | |
1720 | } | |
1721 | ||
1722 | static inline void txq_trans_update(struct netdev_queue *txq) | |
1723 | { | |
1724 | if (txq->xmit_lock_owner != -1) | |
1725 | txq->trans_start = jiffies; | |
1726 | } | |
1727 | ||
1728 | /** | |
1729 | * netif_tx_lock - grab network device transmit lock | |
1730 | * @dev: network device | |
1731 | * | |
1732 | * Get network device transmit lock | |
1733 | */ | |
1734 | static inline void netif_tx_lock(struct net_device *dev) | |
1735 | { | |
1736 | unsigned int i; | |
1737 | int cpu; | |
1738 | ||
1739 | spin_lock(&dev->tx_global_lock); | |
1740 | cpu = smp_processor_id(); | |
1741 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1742 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1743 | ||
1744 | /* We are the only thread of execution doing a | |
1745 | * freeze, but we have to grab the _xmit_lock in | |
1746 | * order to synchronize with threads which are in | |
1747 | * the ->hard_start_xmit() handler and already | |
1748 | * checked the frozen bit. | |
1749 | */ | |
1750 | __netif_tx_lock(txq, cpu); | |
1751 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
1752 | __netif_tx_unlock(txq); | |
1753 | } | |
1754 | } | |
1755 | ||
1756 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
1757 | { | |
1758 | local_bh_disable(); | |
1759 | netif_tx_lock(dev); | |
1760 | } | |
1761 | ||
1762 | static inline void netif_tx_unlock(struct net_device *dev) | |
1763 | { | |
1764 | unsigned int i; | |
1765 | ||
1766 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1767 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1768 | ||
1769 | /* No need to grab the _xmit_lock here. If the | |
1770 | * queue is not stopped for another reason, we | |
1771 | * force a schedule. | |
1772 | */ | |
1773 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
1774 | netif_schedule_queue(txq); | |
1775 | } | |
1776 | spin_unlock(&dev->tx_global_lock); | |
1777 | } | |
1778 | ||
1779 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
1780 | { | |
1781 | netif_tx_unlock(dev); | |
1782 | local_bh_enable(); | |
1783 | } | |
1784 | ||
1785 | #define HARD_TX_LOCK(dev, txq, cpu) { \ | |
1786 | if ((dev->features & NETIF_F_LLTX) == 0) { \ | |
1787 | __netif_tx_lock(txq, cpu); \ | |
1788 | } \ | |
1789 | } | |
1790 | ||
1791 | #define HARD_TX_UNLOCK(dev, txq) { \ | |
1792 | if ((dev->features & NETIF_F_LLTX) == 0) { \ | |
1793 | __netif_tx_unlock(txq); \ | |
1794 | } \ | |
1795 | } | |
1796 | ||
1797 | static inline void netif_tx_disable(struct net_device *dev) | |
1798 | { | |
1799 | unsigned int i; | |
1800 | int cpu; | |
1801 | ||
1802 | local_bh_disable(); | |
1803 | cpu = smp_processor_id(); | |
1804 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1805 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1806 | ||
1807 | __netif_tx_lock(txq, cpu); | |
1808 | netif_tx_stop_queue(txq); | |
1809 | __netif_tx_unlock(txq); | |
1810 | } | |
1811 | local_bh_enable(); | |
1812 | } | |
1813 | ||
1814 | static inline void netif_addr_lock(struct net_device *dev) | |
1815 | { | |
1816 | spin_lock(&dev->addr_list_lock); | |
1817 | } | |
1818 | ||
1819 | static inline void netif_addr_lock_bh(struct net_device *dev) | |
1820 | { | |
1821 | spin_lock_bh(&dev->addr_list_lock); | |
1822 | } | |
1823 | ||
1824 | static inline void netif_addr_unlock(struct net_device *dev) | |
1825 | { | |
1826 | spin_unlock(&dev->addr_list_lock); | |
1827 | } | |
1828 | ||
1829 | static inline void netif_addr_unlock_bh(struct net_device *dev) | |
1830 | { | |
1831 | spin_unlock_bh(&dev->addr_list_lock); | |
1832 | } | |
1833 | ||
1834 | /* | |
1835 | * dev_addrs walker. Should be used only for read access. Call with | |
1836 | * rcu_read_lock held. | |
1837 | */ | |
1838 | #define for_each_dev_addr(dev, ha) \ | |
1839 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) | |
1840 | ||
1841 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ | |
1842 | ||
1843 | extern void ether_setup(struct net_device *dev); | |
1844 | ||
1845 | /* Support for loadable net-drivers */ | |
1846 | extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, | |
1847 | void (*setup)(struct net_device *), | |
1848 | unsigned int queue_count); | |
1849 | #define alloc_netdev(sizeof_priv, name, setup) \ | |
1850 | alloc_netdev_mq(sizeof_priv, name, setup, 1) | |
1851 | extern int register_netdev(struct net_device *dev); | |
1852 | extern void unregister_netdev(struct net_device *dev); | |
1853 | ||
1854 | /* Functions used for device addresses handling */ | |
1855 | extern int dev_addr_add(struct net_device *dev, unsigned char *addr, | |
1856 | unsigned char addr_type); | |
1857 | extern int dev_addr_del(struct net_device *dev, unsigned char *addr, | |
1858 | unsigned char addr_type); | |
1859 | extern int dev_addr_add_multiple(struct net_device *to_dev, | |
1860 | struct net_device *from_dev, | |
1861 | unsigned char addr_type); | |
1862 | extern int dev_addr_del_multiple(struct net_device *to_dev, | |
1863 | struct net_device *from_dev, | |
1864 | unsigned char addr_type); | |
1865 | ||
1866 | /* Functions used for secondary unicast and multicast support */ | |
1867 | extern void dev_set_rx_mode(struct net_device *dev); | |
1868 | extern void __dev_set_rx_mode(struct net_device *dev); | |
1869 | extern int dev_unicast_delete(struct net_device *dev, void *addr); | |
1870 | extern int dev_unicast_add(struct net_device *dev, void *addr); | |
1871 | extern int dev_unicast_sync(struct net_device *to, struct net_device *from); | |
1872 | extern void dev_unicast_unsync(struct net_device *to, struct net_device *from); | |
1873 | extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); | |
1874 | extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); | |
1875 | extern int dev_mc_sync(struct net_device *to, struct net_device *from); | |
1876 | extern void dev_mc_unsync(struct net_device *to, struct net_device *from); | |
1877 | extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all); | |
1878 | extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly); | |
1879 | extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); | |
1880 | extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); | |
1881 | extern int dev_set_promiscuity(struct net_device *dev, int inc); | |
1882 | extern int dev_set_allmulti(struct net_device *dev, int inc); | |
1883 | extern void netdev_state_change(struct net_device *dev); | |
1884 | extern void netdev_bonding_change(struct net_device *dev, | |
1885 | unsigned long event); | |
1886 | extern void netdev_features_change(struct net_device *dev); | |
1887 | /* Load a device via the kmod */ | |
1888 | extern void dev_load(struct net *net, const char *name); | |
1889 | extern void dev_mcast_init(void); | |
1890 | extern const struct net_device_stats *dev_get_stats(struct net_device *dev); | |
1891 | ||
1892 | extern int netdev_max_backlog; | |
1893 | extern int weight_p; | |
1894 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); | |
1895 | extern int skb_checksum_help(struct sk_buff *skb); | |
1896 | extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); | |
1897 | #ifdef CONFIG_BUG | |
1898 | extern void netdev_rx_csum_fault(struct net_device *dev); | |
1899 | #else | |
1900 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
1901 | { | |
1902 | } | |
1903 | #endif | |
1904 | /* rx skb timestamps */ | |
1905 | extern void net_enable_timestamp(void); | |
1906 | extern void net_disable_timestamp(void); | |
1907 | ||
1908 | #ifdef CONFIG_PROC_FS | |
1909 | extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); | |
1910 | extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); | |
1911 | extern void dev_seq_stop(struct seq_file *seq, void *v); | |
1912 | #endif | |
1913 | ||
1914 | extern int netdev_class_create_file(struct class_attribute *class_attr); | |
1915 | extern void netdev_class_remove_file(struct class_attribute *class_attr); | |
1916 | ||
1917 | extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len); | |
1918 | ||
1919 | extern void linkwatch_run_queue(void); | |
1920 | ||
1921 | unsigned long netdev_increment_features(unsigned long all, unsigned long one, | |
1922 | unsigned long mask); | |
1923 | unsigned long netdev_fix_features(unsigned long features, const char *name); | |
1924 | ||
1925 | static inline int net_gso_ok(int features, int gso_type) | |
1926 | { | |
1927 | int feature = gso_type << NETIF_F_GSO_SHIFT; | |
1928 | return (features & feature) == feature; | |
1929 | } | |
1930 | ||
1931 | static inline int skb_gso_ok(struct sk_buff *skb, int features) | |
1932 | { | |
1933 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && | |
1934 | (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST)); | |
1935 | } | |
1936 | ||
1937 | static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) | |
1938 | { | |
1939 | return skb_is_gso(skb) && | |
1940 | (!skb_gso_ok(skb, dev->features) || | |
1941 | unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); | |
1942 | } | |
1943 | ||
1944 | static inline void netif_set_gso_max_size(struct net_device *dev, | |
1945 | unsigned int size) | |
1946 | { | |
1947 | dev->gso_max_size = size; | |
1948 | } | |
1949 | ||
1950 | static inline void skb_bond_set_mac_by_master(struct sk_buff *skb, | |
1951 | struct net_device *master) | |
1952 | { | |
1953 | if (skb->pkt_type == PACKET_HOST) { | |
1954 | u16 *dest = (u16 *) eth_hdr(skb)->h_dest; | |
1955 | ||
1956 | memcpy(dest, master->dev_addr, ETH_ALEN); | |
1957 | } | |
1958 | } | |
1959 | ||
1960 | /* On bonding slaves other than the currently active slave, suppress | |
1961 | * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and | |
1962 | * ARP on active-backup slaves with arp_validate enabled. | |
1963 | */ | |
1964 | static inline int skb_bond_should_drop(struct sk_buff *skb) | |
1965 | { | |
1966 | struct net_device *dev = skb->dev; | |
1967 | struct net_device *master = dev->master; | |
1968 | ||
1969 | if (master) { | |
1970 | if (master->priv_flags & IFF_MASTER_ARPMON) | |
1971 | dev->last_rx = jiffies; | |
1972 | ||
1973 | if ((master->priv_flags & IFF_MASTER_ALB) && master->br_port) { | |
1974 | /* Do address unmangle. The local destination address | |
1975 | * will be always the one master has. Provides the right | |
1976 | * functionality in a bridge. | |
1977 | */ | |
1978 | skb_bond_set_mac_by_master(skb, master); | |
1979 | } | |
1980 | ||
1981 | if (dev->priv_flags & IFF_SLAVE_INACTIVE) { | |
1982 | if ((dev->priv_flags & IFF_SLAVE_NEEDARP) && | |
1983 | skb->protocol == __cpu_to_be16(ETH_P_ARP)) | |
1984 | return 0; | |
1985 | ||
1986 | if (master->priv_flags & IFF_MASTER_ALB) { | |
1987 | if (skb->pkt_type != PACKET_BROADCAST && | |
1988 | skb->pkt_type != PACKET_MULTICAST) | |
1989 | return 0; | |
1990 | } | |
1991 | if (master->priv_flags & IFF_MASTER_8023AD && | |
1992 | skb->protocol == __cpu_to_be16(ETH_P_SLOW)) | |
1993 | return 0; | |
1994 | ||
1995 | return 1; | |
1996 | } | |
1997 | } | |
1998 | return 0; | |
1999 | } | |
2000 | ||
2001 | extern struct pernet_operations __net_initdata loopback_net_ops; | |
2002 | ||
2003 | static inline int dev_ethtool_get_settings(struct net_device *dev, | |
2004 | struct ethtool_cmd *cmd) | |
2005 | { | |
2006 | if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings) | |
2007 | return -EOPNOTSUPP; | |
2008 | return dev->ethtool_ops->get_settings(dev, cmd); | |
2009 | } | |
2010 | ||
2011 | static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev) | |
2012 | { | |
2013 | if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum) | |
2014 | return 0; | |
2015 | return dev->ethtool_ops->get_rx_csum(dev); | |
2016 | } | |
2017 | ||
2018 | static inline u32 dev_ethtool_get_flags(struct net_device *dev) | |
2019 | { | |
2020 | if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags) | |
2021 | return 0; | |
2022 | return dev->ethtool_ops->get_flags(dev); | |
2023 | } | |
2024 | #endif /* __KERNEL__ */ | |
2025 | ||
2026 | #endif /* _LINUX_NETDEVICE_H */ |