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1da177e4 LT |
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 | * | |
02c30a84 | 10 | * Authors: Ross Biro |
1da177e4 LT |
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.Cox@linux.org> | |
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__ | |
d7fe0f24 | 33 | #include <linux/timer.h> |
bea3348e | 34 | #include <linux/delay.h> |
1da177e4 LT |
35 | #include <asm/atomic.h> |
36 | #include <asm/cache.h> | |
37 | #include <asm/byteorder.h> | |
38 | ||
1da177e4 LT |
39 | #include <linux/device.h> |
40 | #include <linux/percpu.h> | |
db217334 | 41 | #include <linux/dmaengine.h> |
bea3348e | 42 | #include <linux/workqueue.h> |
1da177e4 | 43 | |
a050c33f DL |
44 | #include <net/net_namespace.h> |
45 | ||
1da177e4 LT |
46 | struct vlan_group; |
47 | struct ethtool_ops; | |
115c1d6e | 48 | struct netpoll_info; |
704232c2 JB |
49 | /* 802.11 specific */ |
50 | struct wireless_dev; | |
1da177e4 LT |
51 | /* source back-compat hooks */ |
52 | #define SET_ETHTOOL_OPS(netdev,ops) \ | |
53 | ( (netdev)->ethtool_ops = (ops) ) | |
54 | ||
55 | #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev | |
56 | functions are available. */ | |
57 | #define HAVE_FREE_NETDEV /* free_netdev() */ | |
58 | #define HAVE_NETDEV_PRIV /* netdev_priv() */ | |
59 | ||
60 | #define NET_XMIT_SUCCESS 0 | |
61 | #define NET_XMIT_DROP 1 /* skb dropped */ | |
62 | #define NET_XMIT_CN 2 /* congestion notification */ | |
63 | #define NET_XMIT_POLICED 3 /* skb is shot by police */ | |
64 | #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue; | |
65 | (TC use only - dev_queue_xmit | |
66 | returns this as NET_XMIT_SUCCESS) */ | |
67 | ||
68 | /* Backlog congestion levels */ | |
69 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
70 | #define NET_RX_DROP 1 /* packet dropped */ | |
71 | #define NET_RX_CN_LOW 2 /* storm alert, just in case */ | |
72 | #define NET_RX_CN_MOD 3 /* Storm on its way! */ | |
73 | #define NET_RX_CN_HIGH 4 /* The storm is here */ | |
74 | #define NET_RX_BAD 5 /* packet dropped due to kernel error */ | |
75 | ||
b9df3cb8 GR |
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)) | |
1da177e4 LT |
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 | ||
c88e6f51 AB |
91 | #ifdef __KERNEL__ |
92 | ||
1da177e4 LT |
93 | /* |
94 | * Compute the worst case header length according to the protocols | |
95 | * used. | |
96 | */ | |
97 | ||
8388e3da DM |
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) | |
105 | # define LL_MAX_HEADER 48 | |
1da177e4 | 106 | #else |
8388e3da | 107 | # define LL_MAX_HEADER 32 |
1da177e4 LT |
108 | #endif |
109 | ||
e81c7359 DM |
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) | |
1da177e4 LT |
114 | #define MAX_HEADER LL_MAX_HEADER |
115 | #else | |
116 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
117 | #endif | |
118 | ||
c88e6f51 AB |
119 | #endif /* __KERNEL__ */ |
120 | ||
f25f4e44 PWJ |
121 | struct net_device_subqueue |
122 | { | |
123 | /* Give a control state for each queue. This struct may contain | |
124 | * per-queue locks in the future. | |
125 | */ | |
126 | unsigned long state; | |
127 | }; | |
128 | ||
1da177e4 LT |
129 | /* |
130 | * Network device statistics. Akin to the 2.0 ether stats but | |
131 | * with byte counters. | |
132 | */ | |
133 | ||
134 | struct net_device_stats | |
135 | { | |
136 | unsigned long rx_packets; /* total packets received */ | |
137 | unsigned long tx_packets; /* total packets transmitted */ | |
138 | unsigned long rx_bytes; /* total bytes received */ | |
139 | unsigned long tx_bytes; /* total bytes transmitted */ | |
140 | unsigned long rx_errors; /* bad packets received */ | |
141 | unsigned long tx_errors; /* packet transmit problems */ | |
142 | unsigned long rx_dropped; /* no space in linux buffers */ | |
143 | unsigned long tx_dropped; /* no space available in linux */ | |
144 | unsigned long multicast; /* multicast packets received */ | |
145 | unsigned long collisions; | |
146 | ||
147 | /* detailed rx_errors: */ | |
148 | unsigned long rx_length_errors; | |
149 | unsigned long rx_over_errors; /* receiver ring buff overflow */ | |
150 | unsigned long rx_crc_errors; /* recved pkt with crc error */ | |
151 | unsigned long rx_frame_errors; /* recv'd frame alignment error */ | |
152 | unsigned long rx_fifo_errors; /* recv'r fifo overrun */ | |
153 | unsigned long rx_missed_errors; /* receiver missed packet */ | |
154 | ||
155 | /* detailed tx_errors */ | |
156 | unsigned long tx_aborted_errors; | |
157 | unsigned long tx_carrier_errors; | |
158 | unsigned long tx_fifo_errors; | |
159 | unsigned long tx_heartbeat_errors; | |
160 | unsigned long tx_window_errors; | |
161 | ||
162 | /* for cslip etc */ | |
163 | unsigned long rx_compressed; | |
164 | unsigned long tx_compressed; | |
165 | }; | |
166 | ||
167 | ||
168 | /* Media selection options. */ | |
169 | enum { | |
170 | IF_PORT_UNKNOWN = 0, | |
171 | IF_PORT_10BASE2, | |
172 | IF_PORT_10BASET, | |
173 | IF_PORT_AUI, | |
174 | IF_PORT_100BASET, | |
175 | IF_PORT_100BASETX, | |
176 | IF_PORT_100BASEFX | |
177 | }; | |
178 | ||
179 | #ifdef __KERNEL__ | |
180 | ||
181 | #include <linux/cache.h> | |
182 | #include <linux/skbuff.h> | |
183 | ||
184 | struct neighbour; | |
185 | struct neigh_parms; | |
186 | struct sk_buff; | |
187 | ||
188 | struct netif_rx_stats | |
189 | { | |
190 | unsigned total; | |
191 | unsigned dropped; | |
192 | unsigned time_squeeze; | |
1da177e4 LT |
193 | unsigned cpu_collision; |
194 | }; | |
195 | ||
196 | DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); | |
197 | ||
bf742482 PM |
198 | struct dev_addr_list |
199 | { | |
200 | struct dev_addr_list *next; | |
201 | u8 da_addr[MAX_ADDR_LEN]; | |
202 | u8 da_addrlen; | |
a0a400d7 | 203 | u8 da_synced; |
bf742482 PM |
204 | int da_users; |
205 | int da_gusers; | |
206 | }; | |
1da177e4 LT |
207 | |
208 | /* | |
209 | * We tag multicasts with these structures. | |
210 | */ | |
3fba5a8b PM |
211 | |
212 | #define dev_mc_list dev_addr_list | |
213 | #define dmi_addr da_addr | |
214 | #define dmi_addrlen da_addrlen | |
215 | #define dmi_users da_users | |
216 | #define dmi_gusers da_gusers | |
1da177e4 LT |
217 | |
218 | struct hh_cache | |
219 | { | |
220 | struct hh_cache *hh_next; /* Next entry */ | |
221 | atomic_t hh_refcnt; /* number of users */ | |
f0490980 ED |
222 | /* |
223 | * We want hh_output, hh_len, hh_lock and hh_data be a in a separate | |
224 | * cache line on SMP. | |
225 | * They are mostly read, but hh_refcnt may be changed quite frequently, | |
226 | * incurring cache line ping pongs. | |
227 | */ | |
228 | __be16 hh_type ____cacheline_aligned_in_smp; | |
229 | /* protocol identifier, f.e ETH_P_IP | |
1da177e4 LT |
230 | * NOTE: For VLANs, this will be the |
231 | * encapuslated type. --BLG | |
232 | */ | |
d5c42c0e | 233 | u16 hh_len; /* length of header */ |
1da177e4 | 234 | int (*hh_output)(struct sk_buff *skb); |
3644f0ce | 235 | seqlock_t hh_lock; |
1da177e4 LT |
236 | |
237 | /* cached hardware header; allow for machine alignment needs. */ | |
238 | #define HH_DATA_MOD 16 | |
239 | #define HH_DATA_OFF(__len) \ | |
5ba0eac6 | 240 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
1da177e4 LT |
241 | #define HH_DATA_ALIGN(__len) \ |
242 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
243 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
244 | }; | |
245 | ||
246 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
247 | * Alternative is: | |
248 | * dev->hard_header_len ? (dev->hard_header_len + | |
249 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
250 | * | |
251 | * We could use other alignment values, but we must maintain the | |
252 | * relationship HH alignment <= LL alignment. | |
f5184d26 JB |
253 | * |
254 | * LL_ALLOCATED_SPACE also takes into account the tailroom the device | |
255 | * may need. | |
1da177e4 LT |
256 | */ |
257 | #define LL_RESERVED_SPACE(dev) \ | |
f5184d26 | 258 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 259 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
f5184d26 JB |
260 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
261 | #define LL_ALLOCATED_SPACE(dev) \ | |
262 | ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
1da177e4 | 263 | |
3b04ddde SH |
264 | struct header_ops { |
265 | int (*create) (struct sk_buff *skb, struct net_device *dev, | |
266 | unsigned short type, const void *daddr, | |
267 | const void *saddr, unsigned len); | |
268 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); | |
269 | int (*rebuild)(struct sk_buff *skb); | |
270 | #define HAVE_HEADER_CACHE | |
271 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh); | |
272 | void (*cache_update)(struct hh_cache *hh, | |
273 | const struct net_device *dev, | |
274 | const unsigned char *haddr); | |
275 | }; | |
276 | ||
1da177e4 LT |
277 | /* These flag bits are private to the generic network queueing |
278 | * layer, they may not be explicitly referenced by any other | |
279 | * code. | |
280 | */ | |
281 | ||
282 | enum netdev_state_t | |
283 | { | |
1da177e4 LT |
284 | __LINK_STATE_START, |
285 | __LINK_STATE_PRESENT, | |
286 | __LINK_STATE_SCHED, | |
287 | __LINK_STATE_NOCARRIER, | |
b00055aa SR |
288 | __LINK_STATE_LINKWATCH_PENDING, |
289 | __LINK_STATE_DORMANT, | |
1da177e4 LT |
290 | }; |
291 | ||
292 | ||
293 | /* | |
294 | * This structure holds at boot time configured netdevice settings. They | |
295 | * are then used in the device probing. | |
296 | */ | |
297 | struct netdev_boot_setup { | |
298 | char name[IFNAMSIZ]; | |
299 | struct ifmap map; | |
300 | }; | |
301 | #define NETDEV_BOOT_SETUP_MAX 8 | |
302 | ||
20380731 | 303 | extern int __init netdev_boot_setup(char *str); |
1da177e4 | 304 | |
bea3348e SH |
305 | /* |
306 | * Structure for NAPI scheduling similar to tasklet but with weighting | |
307 | */ | |
308 | struct napi_struct { | |
309 | /* The poll_list must only be managed by the entity which | |
310 | * changes the state of the NAPI_STATE_SCHED bit. This means | |
311 | * whoever atomically sets that bit can add this napi_struct | |
312 | * to the per-cpu poll_list, and whoever clears that bit | |
313 | * can remove from the list right before clearing the bit. | |
314 | */ | |
315 | struct list_head poll_list; | |
316 | ||
317 | unsigned long state; | |
318 | int weight; | |
319 | int (*poll)(struct napi_struct *, int); | |
320 | #ifdef CONFIG_NETPOLL | |
321 | spinlock_t poll_lock; | |
322 | int poll_owner; | |
323 | struct net_device *dev; | |
324 | struct list_head dev_list; | |
325 | #endif | |
326 | }; | |
327 | ||
328 | enum | |
329 | { | |
330 | NAPI_STATE_SCHED, /* Poll is scheduled */ | |
a0a46196 | 331 | NAPI_STATE_DISABLE, /* Disable pending */ |
bea3348e SH |
332 | }; |
333 | ||
b3c97528 | 334 | extern void __napi_schedule(struct napi_struct *n); |
bea3348e | 335 | |
a0a46196 DM |
336 | static inline int napi_disable_pending(struct napi_struct *n) |
337 | { | |
338 | return test_bit(NAPI_STATE_DISABLE, &n->state); | |
339 | } | |
340 | ||
bea3348e SH |
341 | /** |
342 | * napi_schedule_prep - check if napi can be scheduled | |
343 | * @n: napi context | |
344 | * | |
345 | * Test if NAPI routine is already running, and if not mark | |
346 | * it as running. This is used as a condition variable | |
a0a46196 DM |
347 | * insure only one NAPI poll instance runs. We also make |
348 | * sure there is no pending NAPI disable. | |
bea3348e SH |
349 | */ |
350 | static inline int napi_schedule_prep(struct napi_struct *n) | |
351 | { | |
a0a46196 DM |
352 | return !napi_disable_pending(n) && |
353 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); | |
bea3348e SH |
354 | } |
355 | ||
356 | /** | |
357 | * napi_schedule - schedule NAPI poll | |
358 | * @n: napi context | |
359 | * | |
360 | * Schedule NAPI poll routine to be called if it is not already | |
361 | * running. | |
362 | */ | |
363 | static inline void napi_schedule(struct napi_struct *n) | |
364 | { | |
365 | if (napi_schedule_prep(n)) | |
366 | __napi_schedule(n); | |
367 | } | |
368 | ||
bfe13f54 RD |
369 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
370 | static inline int napi_reschedule(struct napi_struct *napi) | |
371 | { | |
372 | if (napi_schedule_prep(napi)) { | |
373 | __napi_schedule(napi); | |
374 | return 1; | |
375 | } | |
376 | return 0; | |
377 | } | |
378 | ||
bea3348e SH |
379 | /** |
380 | * napi_complete - NAPI processing complete | |
381 | * @n: napi context | |
382 | * | |
383 | * Mark NAPI processing as complete. | |
384 | */ | |
385 | static inline void __napi_complete(struct napi_struct *n) | |
386 | { | |
387 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
388 | list_del(&n->poll_list); | |
389 | smp_mb__before_clear_bit(); | |
390 | clear_bit(NAPI_STATE_SCHED, &n->state); | |
391 | } | |
392 | ||
393 | static inline void napi_complete(struct napi_struct *n) | |
394 | { | |
50fd4407 DM |
395 | unsigned long flags; |
396 | ||
397 | local_irq_save(flags); | |
bea3348e | 398 | __napi_complete(n); |
50fd4407 | 399 | local_irq_restore(flags); |
bea3348e SH |
400 | } |
401 | ||
402 | /** | |
403 | * napi_disable - prevent NAPI from scheduling | |
404 | * @n: napi context | |
405 | * | |
406 | * Stop NAPI from being scheduled on this context. | |
407 | * Waits till any outstanding processing completes. | |
408 | */ | |
409 | static inline void napi_disable(struct napi_struct *n) | |
410 | { | |
a0a46196 | 411 | set_bit(NAPI_STATE_DISABLE, &n->state); |
bea3348e | 412 | while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) |
43cc7380 | 413 | msleep(1); |
a0a46196 | 414 | clear_bit(NAPI_STATE_DISABLE, &n->state); |
bea3348e SH |
415 | } |
416 | ||
417 | /** | |
418 | * napi_enable - enable NAPI scheduling | |
419 | * @n: napi context | |
420 | * | |
421 | * Resume NAPI from being scheduled on this context. | |
422 | * Must be paired with napi_disable. | |
423 | */ | |
424 | static inline void napi_enable(struct napi_struct *n) | |
425 | { | |
426 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
427 | smp_mb__before_clear_bit(); | |
428 | clear_bit(NAPI_STATE_SCHED, &n->state); | |
429 | } | |
430 | ||
c264c3de SH |
431 | #ifdef CONFIG_SMP |
432 | /** | |
433 | * napi_synchronize - wait until NAPI is not running | |
434 | * @n: napi context | |
435 | * | |
436 | * Wait until NAPI is done being scheduled on this context. | |
437 | * Waits till any outstanding processing completes but | |
438 | * does not disable future activations. | |
439 | */ | |
440 | static inline void napi_synchronize(const struct napi_struct *n) | |
441 | { | |
442 | while (test_bit(NAPI_STATE_SCHED, &n->state)) | |
443 | msleep(1); | |
444 | } | |
445 | #else | |
446 | # define napi_synchronize(n) barrier() | |
447 | #endif | |
448 | ||
79d16385 DM |
449 | enum netdev_queue_state_t |
450 | { | |
451 | __QUEUE_STATE_XOFF, | |
452 | __QUEUE_STATE_QDISC_RUNNING, | |
453 | }; | |
454 | ||
bb949fbd | 455 | struct netdev_queue { |
dc2b4847 | 456 | spinlock_t lock; |
bb949fbd | 457 | struct net_device *dev; |
b0e1e646 | 458 | struct Qdisc *qdisc; |
79d16385 | 459 | unsigned long state; |
970565bb | 460 | struct sk_buff *gso_skb; |
c773e847 DM |
461 | spinlock_t _xmit_lock; |
462 | int xmit_lock_owner; | |
b0e1e646 DM |
463 | struct Qdisc *qdisc_sleeping; |
464 | struct list_head qdisc_list; | |
ee609cb3 | 465 | struct netdev_queue *next_sched; |
bb949fbd DM |
466 | }; |
467 | ||
1da177e4 LT |
468 | /* |
469 | * The DEVICE structure. | |
470 | * Actually, this whole structure is a big mistake. It mixes I/O | |
471 | * data with strictly "high-level" data, and it has to know about | |
472 | * almost every data structure used in the INET module. | |
473 | * | |
474 | * FIXME: cleanup struct net_device such that network protocol info | |
475 | * moves out. | |
476 | */ | |
477 | ||
478 | struct net_device | |
479 | { | |
480 | ||
481 | /* | |
482 | * This is the first field of the "visible" part of this structure | |
483 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
484 | * the interface. | |
485 | */ | |
486 | char name[IFNAMSIZ]; | |
9356b8fc ED |
487 | /* device name hash chain */ |
488 | struct hlist_node name_hlist; | |
1da177e4 LT |
489 | |
490 | /* | |
491 | * I/O specific fields | |
492 | * FIXME: Merge these and struct ifmap into one | |
493 | */ | |
494 | unsigned long mem_end; /* shared mem end */ | |
495 | unsigned long mem_start; /* shared mem start */ | |
496 | unsigned long base_addr; /* device I/O address */ | |
497 | unsigned int irq; /* device IRQ number */ | |
498 | ||
499 | /* | |
500 | * Some hardware also needs these fields, but they are not | |
501 | * part of the usual set specified in Space.c. | |
502 | */ | |
503 | ||
504 | unsigned char if_port; /* Selectable AUI, TP,..*/ | |
505 | unsigned char dma; /* DMA channel */ | |
506 | ||
507 | unsigned long state; | |
508 | ||
7562f876 | 509 | struct list_head dev_list; |
bea3348e SH |
510 | #ifdef CONFIG_NETPOLL |
511 | struct list_head napi_list; | |
512 | #endif | |
1da177e4 LT |
513 | |
514 | /* The device initialization function. Called only once. */ | |
515 | int (*init)(struct net_device *dev); | |
516 | ||
517 | /* ------- Fields preinitialized in Space.c finish here ------- */ | |
518 | ||
9356b8fc ED |
519 | /* Net device features */ |
520 | unsigned long features; | |
521 | #define NETIF_F_SG 1 /* Scatter/gather IO. */ | |
d212f87b | 522 | #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ |
9356b8fc ED |
523 | #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ |
524 | #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ | |
d212f87b | 525 | #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ |
9356b8fc ED |
526 | #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ |
527 | #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ | |
528 | #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ | |
529 | #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ | |
530 | #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ | |
531 | #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ | |
37c3185a | 532 | #define NETIF_F_GSO 2048 /* Enable software GSO. */ |
e24eb521 CB |
533 | #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ |
534 | /* do not use LLTX in new drivers */ | |
ce286d32 | 535 | #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ |
f25f4e44 | 536 | #define NETIF_F_MULTI_QUEUE 16384 /* Has multiple TX/RX queues */ |
3ae7c0b2 | 537 | #define NETIF_F_LRO 32768 /* large receive offload */ |
7967168c HX |
538 | |
539 | /* Segmentation offload features */ | |
289c79a4 PM |
540 | #define NETIF_F_GSO_SHIFT 16 |
541 | #define NETIF_F_GSO_MASK 0xffff0000 | |
7967168c | 542 | #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) |
f83ef8c0 | 543 | #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) |
576a30eb | 544 | #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) |
f83ef8c0 HX |
545 | #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) |
546 | #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) | |
9356b8fc | 547 | |
78eb8877 HX |
548 | /* List of features with software fallbacks. */ |
549 | #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) | |
550 | ||
d212f87b | 551 | |
8648b305 | 552 | #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) |
d212f87b SH |
553 | #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) |
554 | #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) | |
555 | #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) | |
8648b305 | 556 | |
1da177e4 LT |
557 | /* Interface index. Unique device identifier */ |
558 | int ifindex; | |
559 | int iflink; | |
560 | ||
561 | ||
562 | struct net_device_stats* (*get_stats)(struct net_device *dev); | |
c45d286e | 563 | struct net_device_stats stats; |
1da177e4 | 564 | |
b86e0280 | 565 | #ifdef CONFIG_WIRELESS_EXT |
1da177e4 LT |
566 | /* List of functions to handle Wireless Extensions (instead of ioctl). |
567 | * See <net/iw_handler.h> for details. Jean II */ | |
568 | const struct iw_handler_def * wireless_handlers; | |
569 | /* Instance data managed by the core of Wireless Extensions. */ | |
570 | struct iw_public_data * wireless_data; | |
b86e0280 | 571 | #endif |
76fd8593 | 572 | const struct ethtool_ops *ethtool_ops; |
1da177e4 | 573 | |
3b04ddde SH |
574 | /* Hardware header description */ |
575 | const struct header_ops *header_ops; | |
576 | ||
1da177e4 LT |
577 | /* |
578 | * This marks the end of the "visible" part of the structure. All | |
579 | * fields hereafter are internal to the system, and may change at | |
580 | * will (read: may be cleaned up at will). | |
581 | */ | |
582 | ||
1da177e4 | 583 | |
b00055aa | 584 | unsigned int flags; /* interface flags (a la BSD) */ |
1da177e4 LT |
585 | unsigned short gflags; |
586 | unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ | |
587 | unsigned short padded; /* How much padding added by alloc_netdev() */ | |
588 | ||
b00055aa SR |
589 | unsigned char operstate; /* RFC2863 operstate */ |
590 | unsigned char link_mode; /* mapping policy to operstate */ | |
591 | ||
1da177e4 LT |
592 | unsigned mtu; /* interface MTU value */ |
593 | unsigned short type; /* interface hardware type */ | |
594 | unsigned short hard_header_len; /* hardware hdr length */ | |
1da177e4 | 595 | |
f5184d26 JB |
596 | /* extra head- and tailroom the hardware may need, but not in all cases |
597 | * can this be guaranteed, especially tailroom. Some cases also use | |
598 | * LL_MAX_HEADER instead to allocate the skb. | |
599 | */ | |
600 | unsigned short needed_headroom; | |
601 | unsigned short needed_tailroom; | |
602 | ||
1da177e4 LT |
603 | struct net_device *master; /* Pointer to master device of a group, |
604 | * which this device is member of. | |
605 | */ | |
606 | ||
607 | /* Interface address info. */ | |
a6f9a705 | 608 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
1da177e4 LT |
609 | unsigned char addr_len; /* hardware address length */ |
610 | unsigned short dev_id; /* for shared network cards */ | |
611 | ||
f1f28aa3 | 612 | spinlock_t addr_list_lock; |
4417da66 PM |
613 | struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */ |
614 | int uc_count; /* Number of installed ucasts */ | |
615 | int uc_promisc; | |
3fba5a8b | 616 | struct dev_addr_list *mc_list; /* Multicast mac addresses */ |
1da177e4 | 617 | int mc_count; /* Number of installed mcasts */ |
9d45abe1 WC |
618 | unsigned int promiscuity; |
619 | unsigned int allmulti; | |
1da177e4 | 620 | |
1da177e4 LT |
621 | |
622 | /* Protocol specific pointers */ | |
623 | ||
624 | void *atalk_ptr; /* AppleTalk link */ | |
625 | void *ip_ptr; /* IPv4 specific data */ | |
626 | void *dn_ptr; /* DECnet specific data */ | |
627 | void *ip6_ptr; /* IPv6 specific data */ | |
628 | void *ec_ptr; /* Econet specific data */ | |
629 | void *ax25_ptr; /* AX.25 specific data */ | |
704232c2 JB |
630 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, |
631 | assign before registering */ | |
1da177e4 | 632 | |
9356b8fc ED |
633 | /* |
634 | * Cache line mostly used on receive path (including eth_type_trans()) | |
635 | */ | |
9356b8fc ED |
636 | unsigned long last_rx; /* Time of last Rx */ |
637 | /* Interface address info used in eth_type_trans() */ | |
638 | unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast | |
639 | because most packets are unicast) */ | |
640 | ||
641 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ | |
1da177e4 | 642 | |
bb949fbd | 643 | struct netdev_queue rx_queue; |
dc2b4847 | 644 | struct netdev_queue tx_queue ____cacheline_aligned_in_smp; |
1da177e4 LT |
645 | unsigned long tx_queue_len; /* Max frames per queue allowed */ |
646 | ||
9356b8fc ED |
647 | /* |
648 | * One part is mostly used on xmit path (device) | |
649 | */ | |
9356b8fc ED |
650 | void *priv; /* pointer to private data */ |
651 | int (*hard_start_xmit) (struct sk_buff *skb, | |
652 | struct net_device *dev); | |
653 | /* These may be needed for future network-power-down code. */ | |
654 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ | |
655 | ||
656 | int watchdog_timeo; /* used by dev_watchdog() */ | |
657 | struct timer_list watchdog_timer; | |
658 | ||
659 | /* | |
660 | * refcnt is a very hot point, so align it on SMP | |
661 | */ | |
1da177e4 | 662 | /* Number of references to this device */ |
9356b8fc ED |
663 | atomic_t refcnt ____cacheline_aligned_in_smp; |
664 | ||
1da177e4 LT |
665 | /* delayed register/unregister */ |
666 | struct list_head todo_list; | |
1da177e4 LT |
667 | /* device index hash chain */ |
668 | struct hlist_node index_hlist; | |
669 | ||
572a103d HX |
670 | struct net_device *link_watch_next; |
671 | ||
1da177e4 LT |
672 | /* register/unregister state machine */ |
673 | enum { NETREG_UNINITIALIZED=0, | |
b17a7c17 | 674 | NETREG_REGISTERED, /* completed register_netdevice */ |
1da177e4 LT |
675 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
676 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
677 | NETREG_RELEASED, /* called free_netdev */ | |
678 | } reg_state; | |
679 | ||
1da177e4 LT |
680 | /* Called after device is detached from network. */ |
681 | void (*uninit)(struct net_device *dev); | |
682 | /* Called after last user reference disappears. */ | |
683 | void (*destructor)(struct net_device *dev); | |
684 | ||
685 | /* Pointers to interface service routines. */ | |
686 | int (*open)(struct net_device *dev); | |
687 | int (*stop)(struct net_device *dev); | |
1da177e4 | 688 | #define HAVE_NETDEV_POLL |
24023451 PM |
689 | #define HAVE_CHANGE_RX_FLAGS |
690 | void (*change_rx_flags)(struct net_device *dev, | |
691 | int flags); | |
4417da66 PM |
692 | #define HAVE_SET_RX_MODE |
693 | void (*set_rx_mode)(struct net_device *dev); | |
1da177e4 LT |
694 | #define HAVE_MULTICAST |
695 | void (*set_multicast_list)(struct net_device *dev); | |
696 | #define HAVE_SET_MAC_ADDR | |
697 | int (*set_mac_address)(struct net_device *dev, | |
698 | void *addr); | |
bada339b JG |
699 | #define HAVE_VALIDATE_ADDR |
700 | int (*validate_addr)(struct net_device *dev); | |
1da177e4 LT |
701 | #define HAVE_PRIVATE_IOCTL |
702 | int (*do_ioctl)(struct net_device *dev, | |
703 | struct ifreq *ifr, int cmd); | |
704 | #define HAVE_SET_CONFIG | |
705 | int (*set_config)(struct net_device *dev, | |
706 | struct ifmap *map); | |
1da177e4 LT |
707 | #define HAVE_CHANGE_MTU |
708 | int (*change_mtu)(struct net_device *dev, int new_mtu); | |
709 | ||
710 | #define HAVE_TX_TIMEOUT | |
711 | void (*tx_timeout) (struct net_device *dev); | |
712 | ||
713 | void (*vlan_rx_register)(struct net_device *dev, | |
714 | struct vlan_group *grp); | |
715 | void (*vlan_rx_add_vid)(struct net_device *dev, | |
716 | unsigned short vid); | |
717 | void (*vlan_rx_kill_vid)(struct net_device *dev, | |
718 | unsigned short vid); | |
719 | ||
1da177e4 LT |
720 | int (*neigh_setup)(struct net_device *dev, struct neigh_parms *); |
721 | #ifdef CONFIG_NETPOLL | |
115c1d6e | 722 | struct netpoll_info *npinfo; |
1da177e4 LT |
723 | #endif |
724 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
725 | void (*poll_controller)(struct net_device *dev); | |
726 | #endif | |
727 | ||
c346dca1 | 728 | #ifdef CONFIG_NET_NS |
4a1c5371 EB |
729 | /* Network namespace this network device is inside */ |
730 | struct net *nd_net; | |
c346dca1 | 731 | #endif |
4a1c5371 | 732 | |
4951704b DM |
733 | /* mid-layer private */ |
734 | void *ml_priv; | |
735 | ||
1da177e4 LT |
736 | /* bridge stuff */ |
737 | struct net_bridge_port *br_port; | |
b863ceb7 PM |
738 | /* macvlan */ |
739 | struct macvlan_port *macvlan_port; | |
eca9ebac PM |
740 | /* GARP */ |
741 | struct garp_port *garp_port; | |
1da177e4 | 742 | |
1da177e4 | 743 | /* class/net/name entry */ |
43cb76d9 | 744 | struct device dev; |
fe9925b5 SH |
745 | /* space for optional statistics and wireless sysfs groups */ |
746 | struct attribute_group *sysfs_groups[3]; | |
38f7b870 PM |
747 | |
748 | /* rtnetlink link ops */ | |
749 | const struct rtnl_link_ops *rtnl_link_ops; | |
f25f4e44 | 750 | |
289c79a4 PM |
751 | /* VLAN feature mask */ |
752 | unsigned long vlan_features; | |
753 | ||
82cc1a7a PWJ |
754 | /* for setting kernel sock attribute on TCP connection setup */ |
755 | #define GSO_MAX_SIZE 65536 | |
756 | unsigned int gso_max_size; | |
757 | ||
f25f4e44 PWJ |
758 | /* The TX queue control structures */ |
759 | unsigned int egress_subqueue_count; | |
31ce72a6 | 760 | struct net_device_subqueue egress_subqueue[1]; |
1da177e4 | 761 | }; |
43cb76d9 | 762 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
1da177e4 LT |
763 | |
764 | #define NETDEV_ALIGN 32 | |
765 | #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) | |
766 | ||
c346dca1 YH |
767 | /* |
768 | * Net namespace inlines | |
769 | */ | |
770 | static inline | |
771 | struct net *dev_net(const struct net_device *dev) | |
772 | { | |
773 | #ifdef CONFIG_NET_NS | |
774 | return dev->nd_net; | |
775 | #else | |
776 | return &init_net; | |
777 | #endif | |
778 | } | |
779 | ||
780 | static inline | |
f5aa23fd | 781 | void dev_net_set(struct net_device *dev, struct net *net) |
c346dca1 YH |
782 | { |
783 | #ifdef CONFIG_NET_NS | |
f3005d7f DL |
784 | release_net(dev->nd_net); |
785 | dev->nd_net = hold_net(net); | |
c346dca1 YH |
786 | #endif |
787 | } | |
788 | ||
bea3348e SH |
789 | /** |
790 | * netdev_priv - access network device private data | |
791 | * @dev: network device | |
792 | * | |
793 | * Get network device private data | |
794 | */ | |
6472ce60 | 795 | static inline void *netdev_priv(const struct net_device *dev) |
1da177e4 | 796 | { |
f25f4e44 | 797 | return dev->priv; |
1da177e4 LT |
798 | } |
799 | ||
1da177e4 LT |
800 | /* Set the sysfs physical device reference for the network logical device |
801 | * if set prior to registration will cause a symlink during initialization. | |
802 | */ | |
43cb76d9 | 803 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
1da177e4 | 804 | |
3b582cc1 SH |
805 | /** |
806 | * netif_napi_add - initialize a napi context | |
807 | * @dev: network device | |
808 | * @napi: napi context | |
809 | * @poll: polling function | |
810 | * @weight: default weight | |
811 | * | |
812 | * netif_napi_add() must be used to initialize a napi context prior to calling | |
813 | * *any* of the other napi related functions. | |
814 | */ | |
bea3348e SH |
815 | static inline void netif_napi_add(struct net_device *dev, |
816 | struct napi_struct *napi, | |
817 | int (*poll)(struct napi_struct *, int), | |
818 | int weight) | |
819 | { | |
820 | INIT_LIST_HEAD(&napi->poll_list); | |
821 | napi->poll = poll; | |
822 | napi->weight = weight; | |
823 | #ifdef CONFIG_NETPOLL | |
824 | napi->dev = dev; | |
825 | list_add(&napi->dev_list, &dev->napi_list); | |
826 | spin_lock_init(&napi->poll_lock); | |
827 | napi->poll_owner = -1; | |
828 | #endif | |
829 | set_bit(NAPI_STATE_SCHED, &napi->state); | |
830 | } | |
831 | ||
d8156534 AD |
832 | /** |
833 | * netif_napi_del - remove a napi context | |
834 | * @napi: napi context | |
835 | * | |
836 | * netif_napi_del() removes a napi context from the network device napi list | |
837 | */ | |
838 | static inline void netif_napi_del(struct napi_struct *napi) | |
839 | { | |
840 | #ifdef CONFIG_NETPOLL | |
841 | list_del(&napi->dev_list); | |
842 | #endif | |
843 | } | |
844 | ||
1da177e4 | 845 | struct packet_type { |
f2ccd8fa DM |
846 | __be16 type; /* This is really htons(ether_type). */ |
847 | struct net_device *dev; /* NULL is wildcarded here */ | |
848 | int (*func) (struct sk_buff *, | |
849 | struct net_device *, | |
850 | struct packet_type *, | |
851 | struct net_device *); | |
576a30eb HX |
852 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
853 | int features); | |
a430a43d | 854 | int (*gso_send_check)(struct sk_buff *skb); |
1da177e4 LT |
855 | void *af_packet_priv; |
856 | struct list_head list; | |
857 | }; | |
858 | ||
859 | #include <linux/interrupt.h> | |
860 | #include <linux/notifier.h> | |
861 | ||
1da177e4 LT |
862 | extern rwlock_t dev_base_lock; /* Device list lock */ |
863 | ||
7562f876 | 864 | |
881d966b EB |
865 | #define for_each_netdev(net, d) \ |
866 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) | |
867 | #define for_each_netdev_safe(net, d, n) \ | |
868 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) | |
869 | #define for_each_netdev_continue(net, d) \ | |
870 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) | |
871 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) | |
7562f876 | 872 | |
a050c33f DL |
873 | static inline struct net_device *next_net_device(struct net_device *dev) |
874 | { | |
875 | struct list_head *lh; | |
876 | struct net *net; | |
877 | ||
c346dca1 | 878 | net = dev_net(dev); |
a050c33f DL |
879 | lh = dev->dev_list.next; |
880 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
881 | } | |
882 | ||
883 | static inline struct net_device *first_net_device(struct net *net) | |
884 | { | |
885 | return list_empty(&net->dev_base_head) ? NULL : | |
886 | net_device_entry(net->dev_base_head.next); | |
887 | } | |
7562f876 | 888 | |
1da177e4 LT |
889 | extern int netdev_boot_setup_check(struct net_device *dev); |
890 | extern unsigned long netdev_boot_base(const char *prefix, int unit); | |
881d966b EB |
891 | extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr); |
892 | extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
893 | extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1da177e4 LT |
894 | extern void dev_add_pack(struct packet_type *pt); |
895 | extern void dev_remove_pack(struct packet_type *pt); | |
896 | extern void __dev_remove_pack(struct packet_type *pt); | |
897 | ||
881d966b | 898 | extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags, |
1da177e4 | 899 | unsigned short mask); |
881d966b EB |
900 | extern struct net_device *dev_get_by_name(struct net *net, const char *name); |
901 | extern struct net_device *__dev_get_by_name(struct net *net, const char *name); | |
1da177e4 LT |
902 | extern int dev_alloc_name(struct net_device *dev, const char *name); |
903 | extern int dev_open(struct net_device *dev); | |
904 | extern int dev_close(struct net_device *dev); | |
0187bdfb | 905 | extern void dev_disable_lro(struct net_device *dev); |
1da177e4 LT |
906 | extern int dev_queue_xmit(struct sk_buff *skb); |
907 | extern int register_netdevice(struct net_device *dev); | |
22f8cde5 | 908 | extern void unregister_netdevice(struct net_device *dev); |
1da177e4 LT |
909 | extern void free_netdev(struct net_device *dev); |
910 | extern void synchronize_net(void); | |
911 | extern int register_netdevice_notifier(struct notifier_block *nb); | |
912 | extern int unregister_netdevice_notifier(struct notifier_block *nb); | |
ad7379d4 | 913 | extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); |
881d966b EB |
914 | extern struct net_device *dev_get_by_index(struct net *net, int ifindex); |
915 | extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); | |
1da177e4 LT |
916 | extern int dev_restart(struct net_device *dev); |
917 | #ifdef CONFIG_NETPOLL_TRAP | |
918 | extern int netpoll_trap(void); | |
919 | #endif | |
920 | ||
0c4e8581 SH |
921 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
922 | unsigned short type, | |
3b04ddde SH |
923 | const void *daddr, const void *saddr, |
924 | unsigned len) | |
0c4e8581 | 925 | { |
f1ecfd5d | 926 | if (!dev->header_ops || !dev->header_ops->create) |
0c4e8581 | 927 | return 0; |
3b04ddde SH |
928 | |
929 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); | |
0c4e8581 SH |
930 | } |
931 | ||
b95cce35 SH |
932 | static inline int dev_parse_header(const struct sk_buff *skb, |
933 | unsigned char *haddr) | |
934 | { | |
935 | const struct net_device *dev = skb->dev; | |
936 | ||
1b83336b | 937 | if (!dev->header_ops || !dev->header_ops->parse) |
b95cce35 | 938 | return 0; |
3b04ddde | 939 | return dev->header_ops->parse(skb, haddr); |
b95cce35 SH |
940 | } |
941 | ||
1da177e4 LT |
942 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); |
943 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); | |
944 | static inline int unregister_gifconf(unsigned int family) | |
945 | { | |
946 | return register_gifconf(family, NULL); | |
947 | } | |
948 | ||
949 | /* | |
950 | * Incoming packets are placed on per-cpu queues so that | |
951 | * no locking is needed. | |
952 | */ | |
1da177e4 LT |
953 | struct softnet_data |
954 | { | |
ee609cb3 | 955 | struct netdev_queue *output_queue; |
1da177e4 LT |
956 | struct sk_buff_head input_pkt_queue; |
957 | struct list_head poll_list; | |
1da177e4 LT |
958 | struct sk_buff *completion_queue; |
959 | ||
bea3348e | 960 | struct napi_struct backlog; |
db217334 CL |
961 | #ifdef CONFIG_NET_DMA |
962 | struct dma_chan *net_dma; | |
963 | #endif | |
1da177e4 LT |
964 | }; |
965 | ||
966 | DECLARE_PER_CPU(struct softnet_data,softnet_data); | |
967 | ||
968 | #define HAVE_NETIF_QUEUE | |
969 | ||
86d804e1 | 970 | extern void __netif_schedule(struct netdev_queue *txq); |
1da177e4 | 971 | |
86d804e1 | 972 | static inline void netif_schedule_queue(struct netdev_queue *txq) |
1da177e4 | 973 | { |
79d16385 | 974 | if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) |
86d804e1 DM |
975 | __netif_schedule(txq); |
976 | } | |
977 | ||
978 | static inline void netif_schedule(struct net_device *dev) | |
979 | { | |
980 | netif_schedule_queue(&dev->tx_queue); | |
1da177e4 LT |
981 | } |
982 | ||
bea3348e SH |
983 | /** |
984 | * netif_start_queue - allow transmit | |
985 | * @dev: network device | |
986 | * | |
987 | * Allow upper layers to call the device hard_start_xmit routine. | |
988 | */ | |
79d16385 DM |
989 | static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
990 | { | |
991 | clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
992 | } | |
993 | ||
1da177e4 LT |
994 | static inline void netif_start_queue(struct net_device *dev) |
995 | { | |
79d16385 | 996 | netif_tx_start_queue(&dev->tx_queue); |
1da177e4 LT |
997 | } |
998 | ||
bea3348e SH |
999 | /** |
1000 | * netif_wake_queue - restart transmit | |
1001 | * @dev: network device | |
1002 | * | |
1003 | * Allow upper layers to call the device hard_start_xmit routine. | |
1004 | * Used for flow control when transmit resources are available. | |
1005 | */ | |
79d16385 | 1006 | static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) |
1da177e4 LT |
1007 | { |
1008 | #ifdef CONFIG_NETPOLL_TRAP | |
5f286e11 | 1009 | if (netpoll_trap()) { |
79d16385 | 1010 | clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); |
1da177e4 | 1011 | return; |
5f286e11 | 1012 | } |
1da177e4 | 1013 | #endif |
79d16385 DM |
1014 | if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state)) |
1015 | __netif_schedule(dev_queue); | |
1016 | } | |
1017 | ||
1018 | static inline void netif_wake_queue(struct net_device *dev) | |
1019 | { | |
1020 | netif_tx_wake_queue(&dev->tx_queue); | |
1da177e4 LT |
1021 | } |
1022 | ||
bea3348e SH |
1023 | /** |
1024 | * netif_stop_queue - stop transmitted packets | |
1025 | * @dev: network device | |
1026 | * | |
1027 | * Stop upper layers calling the device hard_start_xmit routine. | |
1028 | * Used for flow control when transmit resources are unavailable. | |
1029 | */ | |
79d16385 DM |
1030 | static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
1031 | { | |
1032 | set_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1033 | } | |
1034 | ||
1da177e4 LT |
1035 | static inline void netif_stop_queue(struct net_device *dev) |
1036 | { | |
79d16385 | 1037 | netif_tx_stop_queue(&dev->tx_queue); |
1da177e4 LT |
1038 | } |
1039 | ||
bea3348e SH |
1040 | /** |
1041 | * netif_queue_stopped - test if transmit queue is flowblocked | |
1042 | * @dev: network device | |
1043 | * | |
1044 | * Test if transmit queue on device is currently unable to send. | |
1045 | */ | |
79d16385 DM |
1046 | static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
1047 | { | |
1048 | return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1049 | } | |
1050 | ||
1da177e4 LT |
1051 | static inline int netif_queue_stopped(const struct net_device *dev) |
1052 | { | |
79d16385 | 1053 | return netif_tx_queue_stopped(&dev->tx_queue); |
1da177e4 LT |
1054 | } |
1055 | ||
bea3348e SH |
1056 | /** |
1057 | * netif_running - test if up | |
1058 | * @dev: network device | |
1059 | * | |
1060 | * Test if the device has been brought up. | |
1061 | */ | |
1da177e4 LT |
1062 | static inline int netif_running(const struct net_device *dev) |
1063 | { | |
1064 | return test_bit(__LINK_STATE_START, &dev->state); | |
1065 | } | |
1066 | ||
f25f4e44 PWJ |
1067 | /* |
1068 | * Routines to manage the subqueues on a device. We only need start | |
1069 | * stop, and a check if it's stopped. All other device management is | |
1070 | * done at the overall netdevice level. | |
1071 | * Also test the device if we're multiqueue. | |
1072 | */ | |
bea3348e SH |
1073 | |
1074 | /** | |
1075 | * netif_start_subqueue - allow sending packets on subqueue | |
1076 | * @dev: network device | |
1077 | * @queue_index: sub queue index | |
1078 | * | |
1079 | * Start individual transmit queue of a device with multiple transmit queues. | |
1080 | */ | |
f25f4e44 PWJ |
1081 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
1082 | { | |
79d16385 | 1083 | clear_bit(__QUEUE_STATE_XOFF, &dev->egress_subqueue[queue_index].state); |
f25f4e44 PWJ |
1084 | } |
1085 | ||
bea3348e SH |
1086 | /** |
1087 | * netif_stop_subqueue - stop sending packets on subqueue | |
1088 | * @dev: network device | |
1089 | * @queue_index: sub queue index | |
1090 | * | |
1091 | * Stop individual transmit queue of a device with multiple transmit queues. | |
1092 | */ | |
f25f4e44 PWJ |
1093 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
1094 | { | |
f25f4e44 PWJ |
1095 | #ifdef CONFIG_NETPOLL_TRAP |
1096 | if (netpoll_trap()) | |
1097 | return; | |
1098 | #endif | |
79d16385 | 1099 | set_bit(__QUEUE_STATE_XOFF, &dev->egress_subqueue[queue_index].state); |
f25f4e44 PWJ |
1100 | } |
1101 | ||
bea3348e SH |
1102 | /** |
1103 | * netif_subqueue_stopped - test status of subqueue | |
1104 | * @dev: network device | |
1105 | * @queue_index: sub queue index | |
1106 | * | |
1107 | * Check individual transmit queue of a device with multiple transmit queues. | |
1108 | */ | |
668f895a | 1109 | static inline int __netif_subqueue_stopped(const struct net_device *dev, |
f25f4e44 PWJ |
1110 | u16 queue_index) |
1111 | { | |
79d16385 | 1112 | return test_bit(__QUEUE_STATE_XOFF, |
f25f4e44 | 1113 | &dev->egress_subqueue[queue_index].state); |
f25f4e44 PWJ |
1114 | } |
1115 | ||
668f895a PE |
1116 | static inline int netif_subqueue_stopped(const struct net_device *dev, |
1117 | struct sk_buff *skb) | |
1118 | { | |
1119 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); | |
1120 | } | |
bea3348e SH |
1121 | |
1122 | /** | |
1123 | * netif_wake_subqueue - allow sending packets on subqueue | |
1124 | * @dev: network device | |
1125 | * @queue_index: sub queue index | |
1126 | * | |
1127 | * Resume individual transmit queue of a device with multiple transmit queues. | |
1128 | */ | |
f25f4e44 PWJ |
1129 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) |
1130 | { | |
f25f4e44 PWJ |
1131 | #ifdef CONFIG_NETPOLL_TRAP |
1132 | if (netpoll_trap()) | |
1133 | return; | |
1134 | #endif | |
79d16385 | 1135 | if (test_and_clear_bit(__QUEUE_STATE_XOFF, |
f25f4e44 | 1136 | &dev->egress_subqueue[queue_index].state)) |
86d804e1 | 1137 | __netif_schedule(&dev->tx_queue); |
f25f4e44 PWJ |
1138 | } |
1139 | ||
bea3348e SH |
1140 | /** |
1141 | * netif_is_multiqueue - test if device has multiple transmit queues | |
1142 | * @dev: network device | |
1143 | * | |
1144 | * Check if device has multiple transmit queues | |
1145 | * Always falls if NETDEVICE_MULTIQUEUE is not configured | |
1146 | */ | |
f25f4e44 PWJ |
1147 | static inline int netif_is_multiqueue(const struct net_device *dev) |
1148 | { | |
f25f4e44 | 1149 | return (!!(NETIF_F_MULTI_QUEUE & dev->features)); |
f25f4e44 | 1150 | } |
1da177e4 LT |
1151 | |
1152 | /* Use this variant when it is known for sure that it | |
0ef47309 ML |
1153 | * is executing from hardware interrupt context or with hardware interrupts |
1154 | * disabled. | |
1da177e4 | 1155 | */ |
bea3348e | 1156 | extern void dev_kfree_skb_irq(struct sk_buff *skb); |
1da177e4 LT |
1157 | |
1158 | /* Use this variant in places where it could be invoked | |
0ef47309 ML |
1159 | * from either hardware interrupt or other context, with hardware interrupts |
1160 | * either disabled or enabled. | |
1da177e4 | 1161 | */ |
56079431 | 1162 | extern void dev_kfree_skb_any(struct sk_buff *skb); |
1da177e4 LT |
1163 | |
1164 | #define HAVE_NETIF_RX 1 | |
1165 | extern int netif_rx(struct sk_buff *skb); | |
1166 | extern int netif_rx_ni(struct sk_buff *skb); | |
1167 | #define HAVE_NETIF_RECEIVE_SKB 1 | |
1168 | extern int netif_receive_skb(struct sk_buff *skb); | |
bc1d0411 | 1169 | extern void netif_nit_deliver(struct sk_buff *skb); |
c2373ee9 | 1170 | extern int dev_valid_name(const char *name); |
881d966b EB |
1171 | extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); |
1172 | extern int dev_ethtool(struct net *net, struct ifreq *); | |
1da177e4 LT |
1173 | extern unsigned dev_get_flags(const struct net_device *); |
1174 | extern int dev_change_flags(struct net_device *, unsigned); | |
1175 | extern int dev_change_name(struct net_device *, char *); | |
ce286d32 EB |
1176 | extern int dev_change_net_namespace(struct net_device *, |
1177 | struct net *, const char *); | |
1da177e4 LT |
1178 | extern int dev_set_mtu(struct net_device *, int); |
1179 | extern int dev_set_mac_address(struct net_device *, | |
1180 | struct sockaddr *); | |
f6a78bfc HX |
1181 | extern int dev_hard_start_xmit(struct sk_buff *skb, |
1182 | struct net_device *dev); | |
1da177e4 | 1183 | |
20380731 | 1184 | extern int netdev_budget; |
1da177e4 LT |
1185 | |
1186 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
1187 | extern void netdev_run_todo(void); | |
1188 | ||
bea3348e SH |
1189 | /** |
1190 | * dev_put - release reference to device | |
1191 | * @dev: network device | |
1192 | * | |
9ef4429b | 1193 | * Release reference to device to allow it to be freed. |
bea3348e | 1194 | */ |
1da177e4 LT |
1195 | static inline void dev_put(struct net_device *dev) |
1196 | { | |
1197 | atomic_dec(&dev->refcnt); | |
1198 | } | |
1199 | ||
bea3348e SH |
1200 | /** |
1201 | * dev_hold - get reference to device | |
1202 | * @dev: network device | |
1203 | * | |
9ef4429b | 1204 | * Hold reference to device to keep it from being freed. |
bea3348e | 1205 | */ |
15333061 SH |
1206 | static inline void dev_hold(struct net_device *dev) |
1207 | { | |
1208 | atomic_inc(&dev->refcnt); | |
1209 | } | |
1da177e4 LT |
1210 | |
1211 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
1212 | * and _off may be called from IRQ context, but it is caller | |
1213 | * who is responsible for serialization of these calls. | |
b00055aa SR |
1214 | * |
1215 | * The name carrier is inappropriate, these functions should really be | |
1216 | * called netif_lowerlayer_*() because they represent the state of any | |
1217 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
1218 | */ |
1219 | ||
1220 | extern void linkwatch_fire_event(struct net_device *dev); | |
1221 | ||
bea3348e SH |
1222 | /** |
1223 | * netif_carrier_ok - test if carrier present | |
1224 | * @dev: network device | |
1225 | * | |
1226 | * Check if carrier is present on device | |
1227 | */ | |
1da177e4 LT |
1228 | static inline int netif_carrier_ok(const struct net_device *dev) |
1229 | { | |
1230 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
1231 | } | |
1232 | ||
1233 | extern void __netdev_watchdog_up(struct net_device *dev); | |
1234 | ||
0a242efc | 1235 | extern void netif_carrier_on(struct net_device *dev); |
1da177e4 | 1236 | |
0a242efc | 1237 | extern void netif_carrier_off(struct net_device *dev); |
1da177e4 | 1238 | |
bea3348e SH |
1239 | /** |
1240 | * netif_dormant_on - mark device as dormant. | |
1241 | * @dev: network device | |
1242 | * | |
1243 | * Mark device as dormant (as per RFC2863). | |
1244 | * | |
1245 | * The dormant state indicates that the relevant interface is not | |
1246 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
1247 | * in a "pending" state, waiting for some external event. For "on- | |
1248 | * demand" interfaces, this new state identifies the situation where the | |
1249 | * interface is waiting for events to place it in the up state. | |
1250 | * | |
1251 | */ | |
b00055aa SR |
1252 | static inline void netif_dormant_on(struct net_device *dev) |
1253 | { | |
1254 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
1255 | linkwatch_fire_event(dev); | |
1256 | } | |
1257 | ||
bea3348e SH |
1258 | /** |
1259 | * netif_dormant_off - set device as not dormant. | |
1260 | * @dev: network device | |
1261 | * | |
1262 | * Device is not in dormant state. | |
1263 | */ | |
b00055aa SR |
1264 | static inline void netif_dormant_off(struct net_device *dev) |
1265 | { | |
1266 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
1267 | linkwatch_fire_event(dev); | |
1268 | } | |
1269 | ||
bea3348e SH |
1270 | /** |
1271 | * netif_dormant - test if carrier present | |
1272 | * @dev: network device | |
1273 | * | |
1274 | * Check if carrier is present on device | |
1275 | */ | |
b00055aa SR |
1276 | static inline int netif_dormant(const struct net_device *dev) |
1277 | { | |
1278 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
1279 | } | |
1280 | ||
1281 | ||
bea3348e SH |
1282 | /** |
1283 | * netif_oper_up - test if device is operational | |
1284 | * @dev: network device | |
1285 | * | |
1286 | * Check if carrier is operational | |
1287 | */ | |
b00055aa SR |
1288 | static inline int netif_oper_up(const struct net_device *dev) { |
1289 | return (dev->operstate == IF_OPER_UP || | |
1290 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
1291 | } | |
1292 | ||
bea3348e SH |
1293 | /** |
1294 | * netif_device_present - is device available or removed | |
1295 | * @dev: network device | |
1296 | * | |
1297 | * Check if device has not been removed from system. | |
1298 | */ | |
1da177e4 LT |
1299 | static inline int netif_device_present(struct net_device *dev) |
1300 | { | |
1301 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
1302 | } | |
1303 | ||
56079431 | 1304 | extern void netif_device_detach(struct net_device *dev); |
1da177e4 | 1305 | |
56079431 | 1306 | extern void netif_device_attach(struct net_device *dev); |
1da177e4 LT |
1307 | |
1308 | /* | |
1309 | * Network interface message level settings | |
1310 | */ | |
1311 | #define HAVE_NETIF_MSG 1 | |
1312 | ||
1313 | enum { | |
1314 | NETIF_MSG_DRV = 0x0001, | |
1315 | NETIF_MSG_PROBE = 0x0002, | |
1316 | NETIF_MSG_LINK = 0x0004, | |
1317 | NETIF_MSG_TIMER = 0x0008, | |
1318 | NETIF_MSG_IFDOWN = 0x0010, | |
1319 | NETIF_MSG_IFUP = 0x0020, | |
1320 | NETIF_MSG_RX_ERR = 0x0040, | |
1321 | NETIF_MSG_TX_ERR = 0x0080, | |
1322 | NETIF_MSG_TX_QUEUED = 0x0100, | |
1323 | NETIF_MSG_INTR = 0x0200, | |
1324 | NETIF_MSG_TX_DONE = 0x0400, | |
1325 | NETIF_MSG_RX_STATUS = 0x0800, | |
1326 | NETIF_MSG_PKTDATA = 0x1000, | |
1327 | NETIF_MSG_HW = 0x2000, | |
1328 | NETIF_MSG_WOL = 0x4000, | |
1329 | }; | |
1330 | ||
1331 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
1332 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
1333 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
1334 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
1335 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
1336 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
1337 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
1338 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
1339 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
1340 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
1341 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
1342 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
1343 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
1344 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
1345 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
1346 | ||
1347 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
1348 | { | |
1349 | /* use default */ | |
1350 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
1351 | return default_msg_enable_bits; | |
1352 | if (debug_value == 0) /* no output */ | |
1353 | return 0; | |
1354 | /* set low N bits */ | |
1355 | return (1 << debug_value) - 1; | |
1356 | } | |
1357 | ||
0a122576 | 1358 | /* Test if receive needs to be scheduled but only if up */ |
bea3348e SH |
1359 | static inline int netif_rx_schedule_prep(struct net_device *dev, |
1360 | struct napi_struct *napi) | |
1da177e4 | 1361 | { |
a0a46196 | 1362 | return napi_schedule_prep(napi); |
1da177e4 LT |
1363 | } |
1364 | ||
1365 | /* Add interface to tail of rx poll list. This assumes that _prep has | |
1366 | * already been called and returned 1. | |
1367 | */ | |
bea3348e SH |
1368 | static inline void __netif_rx_schedule(struct net_device *dev, |
1369 | struct napi_struct *napi) | |
1370 | { | |
bea3348e SH |
1371 | __napi_schedule(napi); |
1372 | } | |
1da177e4 LT |
1373 | |
1374 | /* Try to reschedule poll. Called by irq handler. */ | |
1375 | ||
bea3348e SH |
1376 | static inline void netif_rx_schedule(struct net_device *dev, |
1377 | struct napi_struct *napi) | |
1da177e4 | 1378 | { |
bea3348e SH |
1379 | if (netif_rx_schedule_prep(dev, napi)) |
1380 | __netif_rx_schedule(dev, napi); | |
1da177e4 LT |
1381 | } |
1382 | ||
bea3348e SH |
1383 | /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */ |
1384 | static inline int netif_rx_reschedule(struct net_device *dev, | |
1385 | struct napi_struct *napi) | |
1da177e4 | 1386 | { |
bea3348e SH |
1387 | if (napi_schedule_prep(napi)) { |
1388 | __netif_rx_schedule(dev, napi); | |
1da177e4 LT |
1389 | return 1; |
1390 | } | |
1391 | return 0; | |
1392 | } | |
1393 | ||
b0ba6667 HX |
1394 | /* same as netif_rx_complete, except that local_irq_save(flags) |
1395 | * has already been issued | |
1396 | */ | |
bea3348e SH |
1397 | static inline void __netif_rx_complete(struct net_device *dev, |
1398 | struct napi_struct *napi) | |
b0ba6667 | 1399 | { |
bea3348e | 1400 | __napi_complete(napi); |
b0ba6667 HX |
1401 | } |
1402 | ||
1da177e4 LT |
1403 | /* Remove interface from poll list: it must be in the poll list |
1404 | * on current cpu. This primitive is called by dev->poll(), when | |
1405 | * it completes the work. The device cannot be out of poll list at this | |
1406 | * moment, it is BUG(). | |
1407 | */ | |
bea3348e SH |
1408 | static inline void netif_rx_complete(struct net_device *dev, |
1409 | struct napi_struct *napi) | |
1da177e4 LT |
1410 | { |
1411 | unsigned long flags; | |
1412 | ||
1413 | local_irq_save(flags); | |
bea3348e | 1414 | __netif_rx_complete(dev, napi); |
1da177e4 LT |
1415 | local_irq_restore(flags); |
1416 | } | |
1417 | ||
bea3348e SH |
1418 | /** |
1419 | * netif_tx_lock - grab network device transmit lock | |
1420 | * @dev: network device | |
c4ea43c5 | 1421 | * @cpu: cpu number of lock owner |
bea3348e SH |
1422 | * |
1423 | * Get network device transmit lock | |
1424 | */ | |
c773e847 | 1425 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
932ff279 | 1426 | { |
c773e847 DM |
1427 | spin_lock(&txq->_xmit_lock); |
1428 | txq->xmit_lock_owner = cpu; | |
22dd7495 JHS |
1429 | } |
1430 | ||
1431 | static inline void netif_tx_lock(struct net_device *dev) | |
1432 | { | |
c773e847 DM |
1433 | __netif_tx_lock(&dev->tx_queue, smp_processor_id()); |
1434 | } | |
1435 | ||
1436 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) | |
1437 | { | |
1438 | spin_lock_bh(&txq->_xmit_lock); | |
1439 | txq->xmit_lock_owner = smp_processor_id(); | |
932ff279 HX |
1440 | } |
1441 | ||
1442 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
1443 | { | |
c773e847 | 1444 | __netif_tx_lock_bh(&dev->tx_queue); |
932ff279 HX |
1445 | } |
1446 | ||
c773e847 | 1447 | static inline int __netif_tx_trylock(struct netdev_queue *txq) |
932ff279 | 1448 | { |
c773e847 | 1449 | int ok = spin_trylock(&txq->_xmit_lock); |
53c4b2cc | 1450 | if (likely(ok)) |
c773e847 | 1451 | txq->xmit_lock_owner = smp_processor_id(); |
53c4b2cc | 1452 | return ok; |
932ff279 HX |
1453 | } |
1454 | ||
c773e847 DM |
1455 | static inline int netif_tx_trylock(struct net_device *dev) |
1456 | { | |
1457 | return __netif_tx_trylock(&dev->tx_queue); | |
1458 | } | |
1459 | ||
1460 | static inline void __netif_tx_unlock(struct netdev_queue *txq) | |
1461 | { | |
1462 | txq->xmit_lock_owner = -1; | |
1463 | spin_unlock(&txq->_xmit_lock); | |
1464 | } | |
1465 | ||
932ff279 HX |
1466 | static inline void netif_tx_unlock(struct net_device *dev) |
1467 | { | |
c773e847 DM |
1468 | __netif_tx_unlock(&dev->tx_queue); |
1469 | } | |
1470 | ||
1471 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) | |
1472 | { | |
1473 | txq->xmit_lock_owner = -1; | |
1474 | spin_unlock_bh(&txq->_xmit_lock); | |
932ff279 HX |
1475 | } |
1476 | ||
1477 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
1478 | { | |
c773e847 | 1479 | __netif_tx_unlock_bh(&dev->tx_queue); |
932ff279 HX |
1480 | } |
1481 | ||
c773e847 | 1482 | #define HARD_TX_LOCK(dev, txq, cpu) { \ |
22dd7495 | 1483 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 1484 | __netif_tx_lock(txq, cpu); \ |
22dd7495 JHS |
1485 | } \ |
1486 | } | |
1487 | ||
c773e847 | 1488 | #define HARD_TX_UNLOCK(dev, txq) { \ |
22dd7495 | 1489 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 1490 | __netif_tx_unlock(txq); \ |
22dd7495 JHS |
1491 | } \ |
1492 | } | |
1493 | ||
1da177e4 LT |
1494 | static inline void netif_tx_disable(struct net_device *dev) |
1495 | { | |
932ff279 | 1496 | netif_tx_lock_bh(dev); |
1da177e4 | 1497 | netif_stop_queue(dev); |
932ff279 | 1498 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
1499 | } |
1500 | ||
e308a5d8 DM |
1501 | static inline void netif_addr_lock(struct net_device *dev) |
1502 | { | |
1503 | spin_lock(&dev->addr_list_lock); | |
1504 | } | |
1505 | ||
1506 | static inline void netif_addr_lock_bh(struct net_device *dev) | |
1507 | { | |
1508 | spin_lock_bh(&dev->addr_list_lock); | |
1509 | } | |
1510 | ||
1511 | static inline void netif_addr_unlock(struct net_device *dev) | |
1512 | { | |
1513 | spin_unlock(&dev->addr_list_lock); | |
1514 | } | |
1515 | ||
1516 | static inline void netif_addr_unlock_bh(struct net_device *dev) | |
1517 | { | |
1518 | spin_unlock_bh(&dev->addr_list_lock); | |
1519 | } | |
1520 | ||
1da177e4 LT |
1521 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
1522 | ||
1523 | extern void ether_setup(struct net_device *dev); | |
1524 | ||
1525 | /* Support for loadable net-drivers */ | |
f25f4e44 PWJ |
1526 | extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, |
1527 | void (*setup)(struct net_device *), | |
1528 | unsigned int queue_count); | |
1529 | #define alloc_netdev(sizeof_priv, name, setup) \ | |
1530 | alloc_netdev_mq(sizeof_priv, name, setup, 1) | |
1da177e4 LT |
1531 | extern int register_netdev(struct net_device *dev); |
1532 | extern void unregister_netdev(struct net_device *dev); | |
4417da66 PM |
1533 | /* Functions used for secondary unicast and multicast support */ |
1534 | extern void dev_set_rx_mode(struct net_device *dev); | |
1535 | extern void __dev_set_rx_mode(struct net_device *dev); | |
1536 | extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen); | |
1537 | extern int dev_unicast_add(struct net_device *dev, void *addr, int alen); | |
e83a2ea8 CL |
1538 | extern int dev_unicast_sync(struct net_device *to, struct net_device *from); |
1539 | extern void dev_unicast_unsync(struct net_device *to, struct net_device *from); | |
1da177e4 LT |
1540 | extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); |
1541 | extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); | |
a0a400d7 PM |
1542 | extern int dev_mc_sync(struct net_device *to, struct net_device *from); |
1543 | extern void dev_mc_unsync(struct net_device *to, struct net_device *from); | |
61cbc2fc PM |
1544 | extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all); |
1545 | extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly); | |
e83a2ea8 CL |
1546 | extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); |
1547 | extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); | |
dad9b335 WC |
1548 | extern int dev_set_promiscuity(struct net_device *dev, int inc); |
1549 | extern int dev_set_allmulti(struct net_device *dev, int inc); | |
1da177e4 | 1550 | extern void netdev_state_change(struct net_device *dev); |
c1da4ac7 | 1551 | extern void netdev_bonding_change(struct net_device *dev); |
d8a33ac4 | 1552 | extern void netdev_features_change(struct net_device *dev); |
1da177e4 | 1553 | /* Load a device via the kmod */ |
881d966b | 1554 | extern void dev_load(struct net *net, const char *name); |
1da177e4 LT |
1555 | extern void dev_mcast_init(void); |
1556 | extern int netdev_max_backlog; | |
1557 | extern int weight_p; | |
1558 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); | |
84fa7933 | 1559 | extern int skb_checksum_help(struct sk_buff *skb); |
576a30eb | 1560 | extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); |
fb286bb2 HX |
1561 | #ifdef CONFIG_BUG |
1562 | extern void netdev_rx_csum_fault(struct net_device *dev); | |
1563 | #else | |
1564 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
1565 | { | |
1566 | } | |
1567 | #endif | |
1da177e4 LT |
1568 | /* rx skb timestamps */ |
1569 | extern void net_enable_timestamp(void); | |
1570 | extern void net_disable_timestamp(void); | |
1571 | ||
20380731 ACM |
1572 | #ifdef CONFIG_PROC_FS |
1573 | extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); | |
1574 | extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); | |
1575 | extern void dev_seq_stop(struct seq_file *seq, void *v); | |
1576 | #endif | |
1577 | ||
b8a9787e JV |
1578 | extern int netdev_class_create_file(struct class_attribute *class_attr); |
1579 | extern void netdev_class_remove_file(struct class_attribute *class_attr); | |
1580 | ||
20380731 ACM |
1581 | extern void linkwatch_run_queue(void); |
1582 | ||
7f353bf2 HX |
1583 | extern int netdev_compute_features(unsigned long all, unsigned long one); |
1584 | ||
bcd76111 | 1585 | static inline int net_gso_ok(int features, int gso_type) |
576a30eb | 1586 | { |
bcd76111 | 1587 | int feature = gso_type << NETIF_F_GSO_SHIFT; |
d6b4991a | 1588 | return (features & feature) == feature; |
576a30eb HX |
1589 | } |
1590 | ||
bcd76111 HX |
1591 | static inline int skb_gso_ok(struct sk_buff *skb, int features) |
1592 | { | |
a430a43d | 1593 | return net_gso_ok(features, skb_shinfo(skb)->gso_type); |
bcd76111 HX |
1594 | } |
1595 | ||
7967168c HX |
1596 | static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) |
1597 | { | |
a430a43d HX |
1598 | return skb_is_gso(skb) && |
1599 | (!skb_gso_ok(skb, dev->features) || | |
84fa7933 | 1600 | unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); |
7967168c HX |
1601 | } |
1602 | ||
82cc1a7a PWJ |
1603 | static inline void netif_set_gso_max_size(struct net_device *dev, |
1604 | unsigned int size) | |
1605 | { | |
1606 | dev->gso_max_size = size; | |
1607 | } | |
1608 | ||
7ea49ed7 | 1609 | /* On bonding slaves other than the currently active slave, suppress |
f5b2b966 JV |
1610 | * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and |
1611 | * ARP on active-backup slaves with arp_validate enabled. | |
7ea49ed7 DM |
1612 | */ |
1613 | static inline int skb_bond_should_drop(struct sk_buff *skb) | |
1614 | { | |
1615 | struct net_device *dev = skb->dev; | |
1616 | struct net_device *master = dev->master; | |
1617 | ||
1618 | if (master && | |
1619 | (dev->priv_flags & IFF_SLAVE_INACTIVE)) { | |
f5b2b966 JV |
1620 | if ((dev->priv_flags & IFF_SLAVE_NEEDARP) && |
1621 | skb->protocol == __constant_htons(ETH_P_ARP)) | |
1622 | return 0; | |
1623 | ||
7ea49ed7 DM |
1624 | if (master->priv_flags & IFF_MASTER_ALB) { |
1625 | if (skb->pkt_type != PACKET_BROADCAST && | |
1626 | skb->pkt_type != PACKET_MULTICAST) | |
1627 | return 0; | |
1628 | } | |
1629 | if (master->priv_flags & IFF_MASTER_8023AD && | |
1630 | skb->protocol == __constant_htons(ETH_P_SLOW)) | |
1631 | return 0; | |
1632 | ||
1633 | return 1; | |
1634 | } | |
1635 | return 0; | |
1636 | } | |
1637 | ||
1da177e4 LT |
1638 | #endif /* __KERNEL__ */ |
1639 | ||
1640 | #endif /* _LINUX_DEV_H */ |