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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 | |
4a1c5371 | 44 | struct net; |
1da177e4 LT |
45 | struct vlan_group; |
46 | struct ethtool_ops; | |
115c1d6e | 47 | struct netpoll_info; |
704232c2 JB |
48 | /* 802.11 specific */ |
49 | struct wireless_dev; | |
1da177e4 LT |
50 | /* source back-compat hooks */ |
51 | #define SET_ETHTOOL_OPS(netdev,ops) \ | |
52 | ( (netdev)->ethtool_ops = (ops) ) | |
53 | ||
54 | #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev | |
55 | functions are available. */ | |
56 | #define HAVE_FREE_NETDEV /* free_netdev() */ | |
57 | #define HAVE_NETDEV_PRIV /* netdev_priv() */ | |
58 | ||
59 | #define NET_XMIT_SUCCESS 0 | |
60 | #define NET_XMIT_DROP 1 /* skb dropped */ | |
61 | #define NET_XMIT_CN 2 /* congestion notification */ | |
62 | #define NET_XMIT_POLICED 3 /* skb is shot by police */ | |
63 | #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue; | |
64 | (TC use only - dev_queue_xmit | |
65 | returns this as NET_XMIT_SUCCESS) */ | |
66 | ||
67 | /* Backlog congestion levels */ | |
68 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
69 | #define NET_RX_DROP 1 /* packet dropped */ | |
70 | #define NET_RX_CN_LOW 2 /* storm alert, just in case */ | |
71 | #define NET_RX_CN_MOD 3 /* Storm on its way! */ | |
72 | #define NET_RX_CN_HIGH 4 /* The storm is here */ | |
73 | #define NET_RX_BAD 5 /* packet dropped due to kernel error */ | |
74 | ||
b9df3cb8 GR |
75 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
76 | * indicates that the device will soon be dropping packets, or already drops | |
77 | * some packets of the same priority; prompting us to send less aggressively. */ | |
78 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e)) | |
1da177e4 LT |
79 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
80 | ||
81 | #endif | |
82 | ||
83 | #define MAX_ADDR_LEN 32 /* Largest hardware address length */ | |
84 | ||
85 | /* Driver transmit return codes */ | |
86 | #define NETDEV_TX_OK 0 /* driver took care of packet */ | |
87 | #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/ | |
88 | #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */ | |
89 | ||
90 | /* | |
91 | * Compute the worst case header length according to the protocols | |
92 | * used. | |
93 | */ | |
94 | ||
95 | #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR) | |
96 | #define LL_MAX_HEADER 32 | |
97 | #else | |
98 | #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) | |
99 | #define LL_MAX_HEADER 96 | |
100 | #else | |
101 | #define LL_MAX_HEADER 48 | |
102 | #endif | |
103 | #endif | |
104 | ||
e81c7359 DM |
105 | #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \ |
106 | !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \ | |
107 | !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \ | |
108 | !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE) | |
1da177e4 LT |
109 | #define MAX_HEADER LL_MAX_HEADER |
110 | #else | |
111 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
112 | #endif | |
113 | ||
f25f4e44 PWJ |
114 | struct net_device_subqueue |
115 | { | |
116 | /* Give a control state for each queue. This struct may contain | |
117 | * per-queue locks in the future. | |
118 | */ | |
119 | unsigned long state; | |
120 | }; | |
121 | ||
1da177e4 LT |
122 | /* |
123 | * Network device statistics. Akin to the 2.0 ether stats but | |
124 | * with byte counters. | |
125 | */ | |
126 | ||
127 | struct net_device_stats | |
128 | { | |
129 | unsigned long rx_packets; /* total packets received */ | |
130 | unsigned long tx_packets; /* total packets transmitted */ | |
131 | unsigned long rx_bytes; /* total bytes received */ | |
132 | unsigned long tx_bytes; /* total bytes transmitted */ | |
133 | unsigned long rx_errors; /* bad packets received */ | |
134 | unsigned long tx_errors; /* packet transmit problems */ | |
135 | unsigned long rx_dropped; /* no space in linux buffers */ | |
136 | unsigned long tx_dropped; /* no space available in linux */ | |
137 | unsigned long multicast; /* multicast packets received */ | |
138 | unsigned long collisions; | |
139 | ||
140 | /* detailed rx_errors: */ | |
141 | unsigned long rx_length_errors; | |
142 | unsigned long rx_over_errors; /* receiver ring buff overflow */ | |
143 | unsigned long rx_crc_errors; /* recved pkt with crc error */ | |
144 | unsigned long rx_frame_errors; /* recv'd frame alignment error */ | |
145 | unsigned long rx_fifo_errors; /* recv'r fifo overrun */ | |
146 | unsigned long rx_missed_errors; /* receiver missed packet */ | |
147 | ||
148 | /* detailed tx_errors */ | |
149 | unsigned long tx_aborted_errors; | |
150 | unsigned long tx_carrier_errors; | |
151 | unsigned long tx_fifo_errors; | |
152 | unsigned long tx_heartbeat_errors; | |
153 | unsigned long tx_window_errors; | |
154 | ||
155 | /* for cslip etc */ | |
156 | unsigned long rx_compressed; | |
157 | unsigned long tx_compressed; | |
158 | }; | |
159 | ||
160 | ||
161 | /* Media selection options. */ | |
162 | enum { | |
163 | IF_PORT_UNKNOWN = 0, | |
164 | IF_PORT_10BASE2, | |
165 | IF_PORT_10BASET, | |
166 | IF_PORT_AUI, | |
167 | IF_PORT_100BASET, | |
168 | IF_PORT_100BASETX, | |
169 | IF_PORT_100BASEFX | |
170 | }; | |
171 | ||
172 | #ifdef __KERNEL__ | |
173 | ||
174 | #include <linux/cache.h> | |
175 | #include <linux/skbuff.h> | |
176 | ||
177 | struct neighbour; | |
178 | struct neigh_parms; | |
179 | struct sk_buff; | |
180 | ||
181 | struct netif_rx_stats | |
182 | { | |
183 | unsigned total; | |
184 | unsigned dropped; | |
185 | unsigned time_squeeze; | |
1da177e4 LT |
186 | unsigned cpu_collision; |
187 | }; | |
188 | ||
189 | DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); | |
190 | ||
bf742482 PM |
191 | struct dev_addr_list |
192 | { | |
193 | struct dev_addr_list *next; | |
194 | u8 da_addr[MAX_ADDR_LEN]; | |
195 | u8 da_addrlen; | |
a0a400d7 | 196 | u8 da_synced; |
bf742482 PM |
197 | int da_users; |
198 | int da_gusers; | |
199 | }; | |
1da177e4 LT |
200 | |
201 | /* | |
202 | * We tag multicasts with these structures. | |
203 | */ | |
3fba5a8b PM |
204 | |
205 | #define dev_mc_list dev_addr_list | |
206 | #define dmi_addr da_addr | |
207 | #define dmi_addrlen da_addrlen | |
208 | #define dmi_users da_users | |
209 | #define dmi_gusers da_gusers | |
1da177e4 LT |
210 | |
211 | struct hh_cache | |
212 | { | |
213 | struct hh_cache *hh_next; /* Next entry */ | |
214 | atomic_t hh_refcnt; /* number of users */ | |
f0490980 ED |
215 | /* |
216 | * We want hh_output, hh_len, hh_lock and hh_data be a in a separate | |
217 | * cache line on SMP. | |
218 | * They are mostly read, but hh_refcnt may be changed quite frequently, | |
219 | * incurring cache line ping pongs. | |
220 | */ | |
221 | __be16 hh_type ____cacheline_aligned_in_smp; | |
222 | /* protocol identifier, f.e ETH_P_IP | |
1da177e4 LT |
223 | * NOTE: For VLANs, this will be the |
224 | * encapuslated type. --BLG | |
225 | */ | |
d5c42c0e | 226 | u16 hh_len; /* length of header */ |
1da177e4 | 227 | int (*hh_output)(struct sk_buff *skb); |
3644f0ce | 228 | seqlock_t hh_lock; |
1da177e4 LT |
229 | |
230 | /* cached hardware header; allow for machine alignment needs. */ | |
231 | #define HH_DATA_MOD 16 | |
232 | #define HH_DATA_OFF(__len) \ | |
5ba0eac6 | 233 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
1da177e4 LT |
234 | #define HH_DATA_ALIGN(__len) \ |
235 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
236 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
237 | }; | |
238 | ||
239 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
240 | * Alternative is: | |
241 | * dev->hard_header_len ? (dev->hard_header_len + | |
242 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
243 | * | |
244 | * We could use other alignment values, but we must maintain the | |
245 | * relationship HH alignment <= LL alignment. | |
246 | */ | |
247 | #define LL_RESERVED_SPACE(dev) \ | |
248 | (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
249 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ | |
250 | ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
251 | ||
252 | /* These flag bits are private to the generic network queueing | |
253 | * layer, they may not be explicitly referenced by any other | |
254 | * code. | |
255 | */ | |
256 | ||
257 | enum netdev_state_t | |
258 | { | |
259 | __LINK_STATE_XOFF=0, | |
260 | __LINK_STATE_START, | |
261 | __LINK_STATE_PRESENT, | |
262 | __LINK_STATE_SCHED, | |
263 | __LINK_STATE_NOCARRIER, | |
b00055aa SR |
264 | __LINK_STATE_LINKWATCH_PENDING, |
265 | __LINK_STATE_DORMANT, | |
48d83325 | 266 | __LINK_STATE_QDISC_RUNNING, |
1da177e4 LT |
267 | }; |
268 | ||
269 | ||
270 | /* | |
271 | * This structure holds at boot time configured netdevice settings. They | |
272 | * are then used in the device probing. | |
273 | */ | |
274 | struct netdev_boot_setup { | |
275 | char name[IFNAMSIZ]; | |
276 | struct ifmap map; | |
277 | }; | |
278 | #define NETDEV_BOOT_SETUP_MAX 8 | |
279 | ||
20380731 | 280 | extern int __init netdev_boot_setup(char *str); |
1da177e4 | 281 | |
bea3348e SH |
282 | /* |
283 | * Structure for NAPI scheduling similar to tasklet but with weighting | |
284 | */ | |
285 | struct napi_struct { | |
286 | /* The poll_list must only be managed by the entity which | |
287 | * changes the state of the NAPI_STATE_SCHED bit. This means | |
288 | * whoever atomically sets that bit can add this napi_struct | |
289 | * to the per-cpu poll_list, and whoever clears that bit | |
290 | * can remove from the list right before clearing the bit. | |
291 | */ | |
292 | struct list_head poll_list; | |
293 | ||
294 | unsigned long state; | |
295 | int weight; | |
296 | int (*poll)(struct napi_struct *, int); | |
297 | #ifdef CONFIG_NETPOLL | |
298 | spinlock_t poll_lock; | |
299 | int poll_owner; | |
300 | struct net_device *dev; | |
301 | struct list_head dev_list; | |
302 | #endif | |
303 | }; | |
304 | ||
305 | enum | |
306 | { | |
307 | NAPI_STATE_SCHED, /* Poll is scheduled */ | |
308 | }; | |
309 | ||
310 | extern void FASTCALL(__napi_schedule(struct napi_struct *n)); | |
311 | ||
312 | /** | |
313 | * napi_schedule_prep - check if napi can be scheduled | |
314 | * @n: napi context | |
315 | * | |
316 | * Test if NAPI routine is already running, and if not mark | |
317 | * it as running. This is used as a condition variable | |
318 | * insure only one NAPI poll instance runs | |
319 | */ | |
320 | static inline int napi_schedule_prep(struct napi_struct *n) | |
321 | { | |
322 | return !test_and_set_bit(NAPI_STATE_SCHED, &n->state); | |
323 | } | |
324 | ||
325 | /** | |
326 | * napi_schedule - schedule NAPI poll | |
327 | * @n: napi context | |
328 | * | |
329 | * Schedule NAPI poll routine to be called if it is not already | |
330 | * running. | |
331 | */ | |
332 | static inline void napi_schedule(struct napi_struct *n) | |
333 | { | |
334 | if (napi_schedule_prep(n)) | |
335 | __napi_schedule(n); | |
336 | } | |
337 | ||
338 | /** | |
339 | * napi_complete - NAPI processing complete | |
340 | * @n: napi context | |
341 | * | |
342 | * Mark NAPI processing as complete. | |
343 | */ | |
344 | static inline void __napi_complete(struct napi_struct *n) | |
345 | { | |
346 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
347 | list_del(&n->poll_list); | |
348 | smp_mb__before_clear_bit(); | |
349 | clear_bit(NAPI_STATE_SCHED, &n->state); | |
350 | } | |
351 | ||
352 | static inline void napi_complete(struct napi_struct *n) | |
353 | { | |
354 | local_irq_disable(); | |
355 | __napi_complete(n); | |
356 | local_irq_enable(); | |
357 | } | |
358 | ||
359 | /** | |
360 | * napi_disable - prevent NAPI from scheduling | |
361 | * @n: napi context | |
362 | * | |
363 | * Stop NAPI from being scheduled on this context. | |
364 | * Waits till any outstanding processing completes. | |
365 | */ | |
366 | static inline void napi_disable(struct napi_struct *n) | |
367 | { | |
368 | while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) | |
369 | msleep_interruptible(1); | |
370 | } | |
371 | ||
372 | /** | |
373 | * napi_enable - enable NAPI scheduling | |
374 | * @n: napi context | |
375 | * | |
376 | * Resume NAPI from being scheduled on this context. | |
377 | * Must be paired with napi_disable. | |
378 | */ | |
379 | static inline void napi_enable(struct napi_struct *n) | |
380 | { | |
381 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
382 | smp_mb__before_clear_bit(); | |
383 | clear_bit(NAPI_STATE_SCHED, &n->state); | |
384 | } | |
385 | ||
1da177e4 LT |
386 | /* |
387 | * The DEVICE structure. | |
388 | * Actually, this whole structure is a big mistake. It mixes I/O | |
389 | * data with strictly "high-level" data, and it has to know about | |
390 | * almost every data structure used in the INET module. | |
391 | * | |
392 | * FIXME: cleanup struct net_device such that network protocol info | |
393 | * moves out. | |
394 | */ | |
395 | ||
396 | struct net_device | |
397 | { | |
398 | ||
399 | /* | |
400 | * This is the first field of the "visible" part of this structure | |
401 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
402 | * the interface. | |
403 | */ | |
404 | char name[IFNAMSIZ]; | |
9356b8fc ED |
405 | /* device name hash chain */ |
406 | struct hlist_node name_hlist; | |
1da177e4 LT |
407 | |
408 | /* | |
409 | * I/O specific fields | |
410 | * FIXME: Merge these and struct ifmap into one | |
411 | */ | |
412 | unsigned long mem_end; /* shared mem end */ | |
413 | unsigned long mem_start; /* shared mem start */ | |
414 | unsigned long base_addr; /* device I/O address */ | |
415 | unsigned int irq; /* device IRQ number */ | |
416 | ||
417 | /* | |
418 | * Some hardware also needs these fields, but they are not | |
419 | * part of the usual set specified in Space.c. | |
420 | */ | |
421 | ||
422 | unsigned char if_port; /* Selectable AUI, TP,..*/ | |
423 | unsigned char dma; /* DMA channel */ | |
424 | ||
425 | unsigned long state; | |
426 | ||
7562f876 | 427 | struct list_head dev_list; |
bea3348e SH |
428 | #ifdef CONFIG_NETPOLL |
429 | struct list_head napi_list; | |
430 | #endif | |
1da177e4 LT |
431 | |
432 | /* The device initialization function. Called only once. */ | |
433 | int (*init)(struct net_device *dev); | |
434 | ||
435 | /* ------- Fields preinitialized in Space.c finish here ------- */ | |
436 | ||
9356b8fc ED |
437 | /* Net device features */ |
438 | unsigned long features; | |
439 | #define NETIF_F_SG 1 /* Scatter/gather IO. */ | |
d212f87b | 440 | #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ |
9356b8fc ED |
441 | #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ |
442 | #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ | |
d212f87b | 443 | #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ |
9356b8fc ED |
444 | #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ |
445 | #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ | |
446 | #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ | |
447 | #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ | |
448 | #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ | |
449 | #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ | |
37c3185a | 450 | #define NETIF_F_GSO 2048 /* Enable software GSO. */ |
9356b8fc | 451 | #define NETIF_F_LLTX 4096 /* LockLess TX */ |
f25f4e44 | 452 | #define NETIF_F_MULTI_QUEUE 16384 /* Has multiple TX/RX queues */ |
3ae7c0b2 | 453 | #define NETIF_F_LRO 32768 /* large receive offload */ |
7967168c HX |
454 | |
455 | /* Segmentation offload features */ | |
456 | #define NETIF_F_GSO_SHIFT 16 | |
bcd76111 | 457 | #define NETIF_F_GSO_MASK 0xffff0000 |
7967168c | 458 | #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) |
f83ef8c0 | 459 | #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) |
576a30eb | 460 | #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) |
f83ef8c0 HX |
461 | #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) |
462 | #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) | |
9356b8fc | 463 | |
78eb8877 HX |
464 | /* List of features with software fallbacks. */ |
465 | #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) | |
466 | ||
d212f87b | 467 | |
8648b305 | 468 | #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) |
d212f87b SH |
469 | #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) |
470 | #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) | |
471 | #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) | |
8648b305 | 472 | |
1da177e4 LT |
473 | struct net_device *next_sched; |
474 | ||
475 | /* Interface index. Unique device identifier */ | |
476 | int ifindex; | |
477 | int iflink; | |
478 | ||
479 | ||
480 | struct net_device_stats* (*get_stats)(struct net_device *dev); | |
c45d286e | 481 | struct net_device_stats stats; |
1da177e4 | 482 | |
b86e0280 | 483 | #ifdef CONFIG_WIRELESS_EXT |
1da177e4 LT |
484 | /* List of functions to handle Wireless Extensions (instead of ioctl). |
485 | * See <net/iw_handler.h> for details. Jean II */ | |
486 | const struct iw_handler_def * wireless_handlers; | |
487 | /* Instance data managed by the core of Wireless Extensions. */ | |
488 | struct iw_public_data * wireless_data; | |
b86e0280 | 489 | #endif |
76fd8593 | 490 | const struct ethtool_ops *ethtool_ops; |
1da177e4 LT |
491 | |
492 | /* | |
493 | * This marks the end of the "visible" part of the structure. All | |
494 | * fields hereafter are internal to the system, and may change at | |
495 | * will (read: may be cleaned up at will). | |
496 | */ | |
497 | ||
1da177e4 | 498 | |
b00055aa | 499 | unsigned int flags; /* interface flags (a la BSD) */ |
1da177e4 LT |
500 | unsigned short gflags; |
501 | unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ | |
502 | unsigned short padded; /* How much padding added by alloc_netdev() */ | |
503 | ||
b00055aa SR |
504 | unsigned char operstate; /* RFC2863 operstate */ |
505 | unsigned char link_mode; /* mapping policy to operstate */ | |
506 | ||
1da177e4 LT |
507 | unsigned mtu; /* interface MTU value */ |
508 | unsigned short type; /* interface hardware type */ | |
509 | unsigned short hard_header_len; /* hardware hdr length */ | |
1da177e4 LT |
510 | |
511 | struct net_device *master; /* Pointer to master device of a group, | |
512 | * which this device is member of. | |
513 | */ | |
514 | ||
515 | /* Interface address info. */ | |
a6f9a705 | 516 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
1da177e4 LT |
517 | unsigned char addr_len; /* hardware address length */ |
518 | unsigned short dev_id; /* for shared network cards */ | |
519 | ||
4417da66 PM |
520 | struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */ |
521 | int uc_count; /* Number of installed ucasts */ | |
522 | int uc_promisc; | |
3fba5a8b | 523 | struct dev_addr_list *mc_list; /* Multicast mac addresses */ |
1da177e4 LT |
524 | int mc_count; /* Number of installed mcasts */ |
525 | int promiscuity; | |
526 | int allmulti; | |
527 | ||
1da177e4 LT |
528 | |
529 | /* Protocol specific pointers */ | |
530 | ||
531 | void *atalk_ptr; /* AppleTalk link */ | |
532 | void *ip_ptr; /* IPv4 specific data */ | |
533 | void *dn_ptr; /* DECnet specific data */ | |
534 | void *ip6_ptr; /* IPv6 specific data */ | |
535 | void *ec_ptr; /* Econet specific data */ | |
536 | void *ax25_ptr; /* AX.25 specific data */ | |
704232c2 JB |
537 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, |
538 | assign before registering */ | |
1da177e4 | 539 | |
9356b8fc ED |
540 | /* |
541 | * Cache line mostly used on receive path (including eth_type_trans()) | |
542 | */ | |
9356b8fc ED |
543 | unsigned long last_rx; /* Time of last Rx */ |
544 | /* Interface address info used in eth_type_trans() */ | |
545 | unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast | |
546 | because most packets are unicast) */ | |
547 | ||
548 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ | |
1da177e4 | 549 | |
9356b8fc ED |
550 | /* |
551 | * Cache line mostly used on queue transmit path (qdisc) | |
552 | */ | |
553 | /* device queue lock */ | |
554 | spinlock_t queue_lock ____cacheline_aligned_in_smp; | |
1da177e4 LT |
555 | struct Qdisc *qdisc; |
556 | struct Qdisc *qdisc_sleeping; | |
1da177e4 LT |
557 | struct list_head qdisc_list; |
558 | unsigned long tx_queue_len; /* Max frames per queue allowed */ | |
559 | ||
f6a78bfc HX |
560 | /* Partially transmitted GSO packet. */ |
561 | struct sk_buff *gso_skb; | |
562 | ||
1da177e4 LT |
563 | /* ingress path synchronizer */ |
564 | spinlock_t ingress_lock; | |
9356b8fc ED |
565 | struct Qdisc *qdisc_ingress; |
566 | ||
567 | /* | |
568 | * One part is mostly used on xmit path (device) | |
569 | */ | |
1da177e4 | 570 | /* hard_start_xmit synchronizer */ |
932ff279 | 571 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; |
1da177e4 LT |
572 | /* cpu id of processor entered to hard_start_xmit or -1, |
573 | if nobody entered there. | |
574 | */ | |
575 | int xmit_lock_owner; | |
9356b8fc ED |
576 | void *priv; /* pointer to private data */ |
577 | int (*hard_start_xmit) (struct sk_buff *skb, | |
578 | struct net_device *dev); | |
579 | /* These may be needed for future network-power-down code. */ | |
580 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ | |
581 | ||
582 | int watchdog_timeo; /* used by dev_watchdog() */ | |
583 | struct timer_list watchdog_timer; | |
584 | ||
585 | /* | |
586 | * refcnt is a very hot point, so align it on SMP | |
587 | */ | |
1da177e4 | 588 | /* Number of references to this device */ |
9356b8fc ED |
589 | atomic_t refcnt ____cacheline_aligned_in_smp; |
590 | ||
1da177e4 LT |
591 | /* delayed register/unregister */ |
592 | struct list_head todo_list; | |
1da177e4 LT |
593 | /* device index hash chain */ |
594 | struct hlist_node index_hlist; | |
595 | ||
572a103d HX |
596 | struct net_device *link_watch_next; |
597 | ||
1da177e4 LT |
598 | /* register/unregister state machine */ |
599 | enum { NETREG_UNINITIALIZED=0, | |
b17a7c17 | 600 | NETREG_REGISTERED, /* completed register_netdevice */ |
1da177e4 LT |
601 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
602 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
603 | NETREG_RELEASED, /* called free_netdev */ | |
604 | } reg_state; | |
605 | ||
1da177e4 LT |
606 | /* Called after device is detached from network. */ |
607 | void (*uninit)(struct net_device *dev); | |
608 | /* Called after last user reference disappears. */ | |
609 | void (*destructor)(struct net_device *dev); | |
610 | ||
611 | /* Pointers to interface service routines. */ | |
612 | int (*open)(struct net_device *dev); | |
613 | int (*stop)(struct net_device *dev); | |
1da177e4 | 614 | #define HAVE_NETDEV_POLL |
1da177e4 LT |
615 | int (*hard_header) (struct sk_buff *skb, |
616 | struct net_device *dev, | |
617 | unsigned short type, | |
618 | void *daddr, | |
619 | void *saddr, | |
620 | unsigned len); | |
621 | int (*rebuild_header)(struct sk_buff *skb); | |
24023451 PM |
622 | #define HAVE_CHANGE_RX_FLAGS |
623 | void (*change_rx_flags)(struct net_device *dev, | |
624 | int flags); | |
4417da66 PM |
625 | #define HAVE_SET_RX_MODE |
626 | void (*set_rx_mode)(struct net_device *dev); | |
1da177e4 LT |
627 | #define HAVE_MULTICAST |
628 | void (*set_multicast_list)(struct net_device *dev); | |
629 | #define HAVE_SET_MAC_ADDR | |
630 | int (*set_mac_address)(struct net_device *dev, | |
631 | void *addr); | |
632 | #define HAVE_PRIVATE_IOCTL | |
633 | int (*do_ioctl)(struct net_device *dev, | |
634 | struct ifreq *ifr, int cmd); | |
635 | #define HAVE_SET_CONFIG | |
636 | int (*set_config)(struct net_device *dev, | |
637 | struct ifmap *map); | |
638 | #define HAVE_HEADER_CACHE | |
639 | int (*hard_header_cache)(struct neighbour *neigh, | |
640 | struct hh_cache *hh); | |
641 | void (*header_cache_update)(struct hh_cache *hh, | |
642 | struct net_device *dev, | |
643 | unsigned char * haddr); | |
644 | #define HAVE_CHANGE_MTU | |
645 | int (*change_mtu)(struct net_device *dev, int new_mtu); | |
646 | ||
647 | #define HAVE_TX_TIMEOUT | |
648 | void (*tx_timeout) (struct net_device *dev); | |
649 | ||
650 | void (*vlan_rx_register)(struct net_device *dev, | |
651 | struct vlan_group *grp); | |
652 | void (*vlan_rx_add_vid)(struct net_device *dev, | |
653 | unsigned short vid); | |
654 | void (*vlan_rx_kill_vid)(struct net_device *dev, | |
655 | unsigned short vid); | |
656 | ||
657 | int (*hard_header_parse)(struct sk_buff *skb, | |
658 | unsigned char *haddr); | |
659 | int (*neigh_setup)(struct net_device *dev, struct neigh_parms *); | |
660 | #ifdef CONFIG_NETPOLL | |
115c1d6e | 661 | struct netpoll_info *npinfo; |
1da177e4 LT |
662 | #endif |
663 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
664 | void (*poll_controller)(struct net_device *dev); | |
665 | #endif | |
666 | ||
4a1c5371 EB |
667 | /* Network namespace this network device is inside */ |
668 | struct net *nd_net; | |
669 | ||
1da177e4 LT |
670 | /* bridge stuff */ |
671 | struct net_bridge_port *br_port; | |
b863ceb7 PM |
672 | /* macvlan */ |
673 | struct macvlan_port *macvlan_port; | |
1da177e4 | 674 | |
1da177e4 | 675 | /* class/net/name entry */ |
43cb76d9 | 676 | struct device dev; |
fe9925b5 SH |
677 | /* space for optional statistics and wireless sysfs groups */ |
678 | struct attribute_group *sysfs_groups[3]; | |
38f7b870 PM |
679 | |
680 | /* rtnetlink link ops */ | |
681 | const struct rtnl_link_ops *rtnl_link_ops; | |
f25f4e44 PWJ |
682 | |
683 | /* The TX queue control structures */ | |
684 | unsigned int egress_subqueue_count; | |
31ce72a6 | 685 | struct net_device_subqueue egress_subqueue[1]; |
1da177e4 | 686 | }; |
43cb76d9 | 687 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
1da177e4 LT |
688 | |
689 | #define NETDEV_ALIGN 32 | |
690 | #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) | |
691 | ||
bea3348e SH |
692 | /** |
693 | * netdev_priv - access network device private data | |
694 | * @dev: network device | |
695 | * | |
696 | * Get network device private data | |
697 | */ | |
6472ce60 | 698 | static inline void *netdev_priv(const struct net_device *dev) |
1da177e4 | 699 | { |
f25f4e44 | 700 | return dev->priv; |
1da177e4 LT |
701 | } |
702 | ||
703 | #define SET_MODULE_OWNER(dev) do { } while (0) | |
704 | /* Set the sysfs physical device reference for the network logical device | |
705 | * if set prior to registration will cause a symlink during initialization. | |
706 | */ | |
43cb76d9 | 707 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
1da177e4 | 708 | |
bea3348e SH |
709 | static inline void netif_napi_add(struct net_device *dev, |
710 | struct napi_struct *napi, | |
711 | int (*poll)(struct napi_struct *, int), | |
712 | int weight) | |
713 | { | |
714 | INIT_LIST_HEAD(&napi->poll_list); | |
715 | napi->poll = poll; | |
716 | napi->weight = weight; | |
717 | #ifdef CONFIG_NETPOLL | |
718 | napi->dev = dev; | |
719 | list_add(&napi->dev_list, &dev->napi_list); | |
720 | spin_lock_init(&napi->poll_lock); | |
721 | napi->poll_owner = -1; | |
722 | #endif | |
723 | set_bit(NAPI_STATE_SCHED, &napi->state); | |
724 | } | |
725 | ||
1da177e4 | 726 | struct packet_type { |
f2ccd8fa DM |
727 | __be16 type; /* This is really htons(ether_type). */ |
728 | struct net_device *dev; /* NULL is wildcarded here */ | |
729 | int (*func) (struct sk_buff *, | |
730 | struct net_device *, | |
731 | struct packet_type *, | |
732 | struct net_device *); | |
576a30eb HX |
733 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
734 | int features); | |
a430a43d | 735 | int (*gso_send_check)(struct sk_buff *skb); |
1da177e4 LT |
736 | void *af_packet_priv; |
737 | struct list_head list; | |
738 | }; | |
739 | ||
740 | #include <linux/interrupt.h> | |
741 | #include <linux/notifier.h> | |
742 | ||
743 | extern struct net_device loopback_dev; /* The loopback */ | |
7562f876 | 744 | extern struct list_head dev_base_head; /* All devices */ |
1da177e4 LT |
745 | extern rwlock_t dev_base_lock; /* Device list lock */ |
746 | ||
7562f876 PE |
747 | #define for_each_netdev(d) \ |
748 | list_for_each_entry(d, &dev_base_head, dev_list) | |
749 | #define for_each_netdev_safe(d, n) \ | |
750 | list_for_each_entry_safe(d, n, &dev_base_head, dev_list) | |
751 | #define for_each_netdev_continue(d) \ | |
752 | list_for_each_entry_continue(d, &dev_base_head, dev_list) | |
753 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) | |
754 | ||
755 | static inline struct net_device *next_net_device(struct net_device *dev) | |
756 | { | |
757 | struct list_head *lh; | |
758 | ||
759 | lh = dev->dev_list.next; | |
760 | return lh == &dev_base_head ? NULL : net_device_entry(lh); | |
761 | } | |
762 | ||
763 | static inline struct net_device *first_net_device(void) | |
764 | { | |
765 | return list_empty(&dev_base_head) ? NULL : | |
766 | net_device_entry(dev_base_head.next); | |
767 | } | |
768 | ||
1da177e4 LT |
769 | extern int netdev_boot_setup_check(struct net_device *dev); |
770 | extern unsigned long netdev_boot_base(const char *prefix, int unit); | |
771 | extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr); | |
772 | extern struct net_device *dev_getfirstbyhwtype(unsigned short type); | |
4e9cac2b | 773 | extern struct net_device *__dev_getfirstbyhwtype(unsigned short type); |
1da177e4 LT |
774 | extern void dev_add_pack(struct packet_type *pt); |
775 | extern void dev_remove_pack(struct packet_type *pt); | |
776 | extern void __dev_remove_pack(struct packet_type *pt); | |
777 | ||
778 | extern struct net_device *dev_get_by_flags(unsigned short flags, | |
779 | unsigned short mask); | |
780 | extern struct net_device *dev_get_by_name(const char *name); | |
781 | extern struct net_device *__dev_get_by_name(const char *name); | |
782 | extern int dev_alloc_name(struct net_device *dev, const char *name); | |
783 | extern int dev_open(struct net_device *dev); | |
784 | extern int dev_close(struct net_device *dev); | |
785 | extern int dev_queue_xmit(struct sk_buff *skb); | |
786 | extern int register_netdevice(struct net_device *dev); | |
22f8cde5 | 787 | extern void unregister_netdevice(struct net_device *dev); |
1da177e4 LT |
788 | extern void free_netdev(struct net_device *dev); |
789 | extern void synchronize_net(void); | |
790 | extern int register_netdevice_notifier(struct notifier_block *nb); | |
791 | extern int unregister_netdevice_notifier(struct notifier_block *nb); | |
792 | extern int call_netdevice_notifiers(unsigned long val, void *v); | |
793 | extern struct net_device *dev_get_by_index(int ifindex); | |
794 | extern struct net_device *__dev_get_by_index(int ifindex); | |
795 | extern int dev_restart(struct net_device *dev); | |
796 | #ifdef CONFIG_NETPOLL_TRAP | |
797 | extern int netpoll_trap(void); | |
798 | #endif | |
799 | ||
800 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); | |
801 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); | |
802 | static inline int unregister_gifconf(unsigned int family) | |
803 | { | |
804 | return register_gifconf(family, NULL); | |
805 | } | |
806 | ||
807 | /* | |
808 | * Incoming packets are placed on per-cpu queues so that | |
809 | * no locking is needed. | |
810 | */ | |
1da177e4 LT |
811 | struct softnet_data |
812 | { | |
31aa02c5 | 813 | struct net_device *output_queue; |
1da177e4 LT |
814 | struct sk_buff_head input_pkt_queue; |
815 | struct list_head poll_list; | |
1da177e4 LT |
816 | struct sk_buff *completion_queue; |
817 | ||
bea3348e | 818 | struct napi_struct backlog; |
db217334 CL |
819 | #ifdef CONFIG_NET_DMA |
820 | struct dma_chan *net_dma; | |
821 | #endif | |
1da177e4 LT |
822 | }; |
823 | ||
824 | DECLARE_PER_CPU(struct softnet_data,softnet_data); | |
825 | ||
826 | #define HAVE_NETIF_QUEUE | |
827 | ||
56079431 | 828 | extern void __netif_schedule(struct net_device *dev); |
1da177e4 LT |
829 | |
830 | static inline void netif_schedule(struct net_device *dev) | |
831 | { | |
832 | if (!test_bit(__LINK_STATE_XOFF, &dev->state)) | |
833 | __netif_schedule(dev); | |
834 | } | |
835 | ||
bea3348e SH |
836 | /** |
837 | * netif_start_queue - allow transmit | |
838 | * @dev: network device | |
839 | * | |
840 | * Allow upper layers to call the device hard_start_xmit routine. | |
841 | */ | |
1da177e4 LT |
842 | static inline void netif_start_queue(struct net_device *dev) |
843 | { | |
844 | clear_bit(__LINK_STATE_XOFF, &dev->state); | |
845 | } | |
846 | ||
bea3348e SH |
847 | /** |
848 | * netif_wake_queue - restart transmit | |
849 | * @dev: network device | |
850 | * | |
851 | * Allow upper layers to call the device hard_start_xmit routine. | |
852 | * Used for flow control when transmit resources are available. | |
853 | */ | |
1da177e4 LT |
854 | static inline void netif_wake_queue(struct net_device *dev) |
855 | { | |
856 | #ifdef CONFIG_NETPOLL_TRAP | |
5f286e11 SS |
857 | if (netpoll_trap()) { |
858 | clear_bit(__LINK_STATE_XOFF, &dev->state); | |
1da177e4 | 859 | return; |
5f286e11 | 860 | } |
1da177e4 LT |
861 | #endif |
862 | if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state)) | |
863 | __netif_schedule(dev); | |
864 | } | |
865 | ||
bea3348e SH |
866 | /** |
867 | * netif_stop_queue - stop transmitted packets | |
868 | * @dev: network device | |
869 | * | |
870 | * Stop upper layers calling the device hard_start_xmit routine. | |
871 | * Used for flow control when transmit resources are unavailable. | |
872 | */ | |
1da177e4 LT |
873 | static inline void netif_stop_queue(struct net_device *dev) |
874 | { | |
1da177e4 LT |
875 | set_bit(__LINK_STATE_XOFF, &dev->state); |
876 | } | |
877 | ||
bea3348e SH |
878 | /** |
879 | * netif_queue_stopped - test if transmit queue is flowblocked | |
880 | * @dev: network device | |
881 | * | |
882 | * Test if transmit queue on device is currently unable to send. | |
883 | */ | |
1da177e4 LT |
884 | static inline int netif_queue_stopped(const struct net_device *dev) |
885 | { | |
886 | return test_bit(__LINK_STATE_XOFF, &dev->state); | |
887 | } | |
888 | ||
bea3348e SH |
889 | /** |
890 | * netif_running - test if up | |
891 | * @dev: network device | |
892 | * | |
893 | * Test if the device has been brought up. | |
894 | */ | |
1da177e4 LT |
895 | static inline int netif_running(const struct net_device *dev) |
896 | { | |
897 | return test_bit(__LINK_STATE_START, &dev->state); | |
898 | } | |
899 | ||
f25f4e44 PWJ |
900 | /* |
901 | * Routines to manage the subqueues on a device. We only need start | |
902 | * stop, and a check if it's stopped. All other device management is | |
903 | * done at the overall netdevice level. | |
904 | * Also test the device if we're multiqueue. | |
905 | */ | |
bea3348e SH |
906 | |
907 | /** | |
908 | * netif_start_subqueue - allow sending packets on subqueue | |
909 | * @dev: network device | |
910 | * @queue_index: sub queue index | |
911 | * | |
912 | * Start individual transmit queue of a device with multiple transmit queues. | |
913 | */ | |
f25f4e44 PWJ |
914 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
915 | { | |
916 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE | |
917 | clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state); | |
918 | #endif | |
919 | } | |
920 | ||
bea3348e SH |
921 | /** |
922 | * netif_stop_subqueue - stop sending packets on subqueue | |
923 | * @dev: network device | |
924 | * @queue_index: sub queue index | |
925 | * | |
926 | * Stop individual transmit queue of a device with multiple transmit queues. | |
927 | */ | |
f25f4e44 PWJ |
928 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
929 | { | |
930 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE | |
931 | #ifdef CONFIG_NETPOLL_TRAP | |
932 | if (netpoll_trap()) | |
933 | return; | |
934 | #endif | |
935 | set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state); | |
936 | #endif | |
937 | } | |
938 | ||
bea3348e SH |
939 | /** |
940 | * netif_subqueue_stopped - test status of subqueue | |
941 | * @dev: network device | |
942 | * @queue_index: sub queue index | |
943 | * | |
944 | * Check individual transmit queue of a device with multiple transmit queues. | |
945 | */ | |
f25f4e44 PWJ |
946 | static inline int netif_subqueue_stopped(const struct net_device *dev, |
947 | u16 queue_index) | |
948 | { | |
949 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE | |
950 | return test_bit(__LINK_STATE_XOFF, | |
951 | &dev->egress_subqueue[queue_index].state); | |
952 | #else | |
953 | return 0; | |
954 | #endif | |
955 | } | |
956 | ||
bea3348e SH |
957 | |
958 | /** | |
959 | * netif_wake_subqueue - allow sending packets on subqueue | |
960 | * @dev: network device | |
961 | * @queue_index: sub queue index | |
962 | * | |
963 | * Resume individual transmit queue of a device with multiple transmit queues. | |
964 | */ | |
f25f4e44 PWJ |
965 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) |
966 | { | |
967 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE | |
968 | #ifdef CONFIG_NETPOLL_TRAP | |
969 | if (netpoll_trap()) | |
970 | return; | |
971 | #endif | |
972 | if (test_and_clear_bit(__LINK_STATE_XOFF, | |
973 | &dev->egress_subqueue[queue_index].state)) | |
974 | __netif_schedule(dev); | |
975 | #endif | |
976 | } | |
977 | ||
bea3348e SH |
978 | /** |
979 | * netif_is_multiqueue - test if device has multiple transmit queues | |
980 | * @dev: network device | |
981 | * | |
982 | * Check if device has multiple transmit queues | |
983 | * Always falls if NETDEVICE_MULTIQUEUE is not configured | |
984 | */ | |
f25f4e44 PWJ |
985 | static inline int netif_is_multiqueue(const struct net_device *dev) |
986 | { | |
987 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE | |
988 | return (!!(NETIF_F_MULTI_QUEUE & dev->features)); | |
989 | #else | |
990 | return 0; | |
991 | #endif | |
992 | } | |
1da177e4 LT |
993 | |
994 | /* Use this variant when it is known for sure that it | |
995 | * is executing from interrupt context. | |
996 | */ | |
bea3348e | 997 | extern void dev_kfree_skb_irq(struct sk_buff *skb); |
1da177e4 LT |
998 | |
999 | /* Use this variant in places where it could be invoked | |
1000 | * either from interrupt or non-interrupt context. | |
1001 | */ | |
56079431 | 1002 | extern void dev_kfree_skb_any(struct sk_buff *skb); |
1da177e4 LT |
1003 | |
1004 | #define HAVE_NETIF_RX 1 | |
1005 | extern int netif_rx(struct sk_buff *skb); | |
1006 | extern int netif_rx_ni(struct sk_buff *skb); | |
1007 | #define HAVE_NETIF_RECEIVE_SKB 1 | |
1008 | extern int netif_receive_skb(struct sk_buff *skb); | |
c2373ee9 | 1009 | extern int dev_valid_name(const char *name); |
1da177e4 LT |
1010 | extern int dev_ioctl(unsigned int cmd, void __user *); |
1011 | extern int dev_ethtool(struct ifreq *); | |
1012 | extern unsigned dev_get_flags(const struct net_device *); | |
1013 | extern int dev_change_flags(struct net_device *, unsigned); | |
1014 | extern int dev_change_name(struct net_device *, char *); | |
1015 | extern int dev_set_mtu(struct net_device *, int); | |
1016 | extern int dev_set_mac_address(struct net_device *, | |
1017 | struct sockaddr *); | |
f6a78bfc HX |
1018 | extern int dev_hard_start_xmit(struct sk_buff *skb, |
1019 | struct net_device *dev); | |
1da177e4 | 1020 | |
20380731 | 1021 | extern int netdev_budget; |
1da177e4 LT |
1022 | |
1023 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
1024 | extern void netdev_run_todo(void); | |
1025 | ||
bea3348e SH |
1026 | /** |
1027 | * dev_put - release reference to device | |
1028 | * @dev: network device | |
1029 | * | |
1030 | * Hold reference to device to keep it from being freed. | |
1031 | */ | |
1da177e4 LT |
1032 | static inline void dev_put(struct net_device *dev) |
1033 | { | |
1034 | atomic_dec(&dev->refcnt); | |
1035 | } | |
1036 | ||
bea3348e SH |
1037 | /** |
1038 | * dev_hold - get reference to device | |
1039 | * @dev: network device | |
1040 | * | |
1041 | * Release reference to device to allow it to be freed. | |
1042 | */ | |
15333061 SH |
1043 | static inline void dev_hold(struct net_device *dev) |
1044 | { | |
1045 | atomic_inc(&dev->refcnt); | |
1046 | } | |
1da177e4 LT |
1047 | |
1048 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
1049 | * and _off may be called from IRQ context, but it is caller | |
1050 | * who is responsible for serialization of these calls. | |
b00055aa SR |
1051 | * |
1052 | * The name carrier is inappropriate, these functions should really be | |
1053 | * called netif_lowerlayer_*() because they represent the state of any | |
1054 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
1055 | */ |
1056 | ||
1057 | extern void linkwatch_fire_event(struct net_device *dev); | |
1058 | ||
bea3348e SH |
1059 | /** |
1060 | * netif_carrier_ok - test if carrier present | |
1061 | * @dev: network device | |
1062 | * | |
1063 | * Check if carrier is present on device | |
1064 | */ | |
1da177e4 LT |
1065 | static inline int netif_carrier_ok(const struct net_device *dev) |
1066 | { | |
1067 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
1068 | } | |
1069 | ||
1070 | extern void __netdev_watchdog_up(struct net_device *dev); | |
1071 | ||
0a242efc | 1072 | extern void netif_carrier_on(struct net_device *dev); |
1da177e4 | 1073 | |
0a242efc | 1074 | extern void netif_carrier_off(struct net_device *dev); |
1da177e4 | 1075 | |
bea3348e SH |
1076 | /** |
1077 | * netif_dormant_on - mark device as dormant. | |
1078 | * @dev: network device | |
1079 | * | |
1080 | * Mark device as dormant (as per RFC2863). | |
1081 | * | |
1082 | * The dormant state indicates that the relevant interface is not | |
1083 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
1084 | * in a "pending" state, waiting for some external event. For "on- | |
1085 | * demand" interfaces, this new state identifies the situation where the | |
1086 | * interface is waiting for events to place it in the up state. | |
1087 | * | |
1088 | */ | |
b00055aa SR |
1089 | static inline void netif_dormant_on(struct net_device *dev) |
1090 | { | |
1091 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
1092 | linkwatch_fire_event(dev); | |
1093 | } | |
1094 | ||
bea3348e SH |
1095 | /** |
1096 | * netif_dormant_off - set device as not dormant. | |
1097 | * @dev: network device | |
1098 | * | |
1099 | * Device is not in dormant state. | |
1100 | */ | |
b00055aa SR |
1101 | static inline void netif_dormant_off(struct net_device *dev) |
1102 | { | |
1103 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
1104 | linkwatch_fire_event(dev); | |
1105 | } | |
1106 | ||
bea3348e SH |
1107 | /** |
1108 | * netif_dormant - test if carrier present | |
1109 | * @dev: network device | |
1110 | * | |
1111 | * Check if carrier is present on device | |
1112 | */ | |
b00055aa SR |
1113 | static inline int netif_dormant(const struct net_device *dev) |
1114 | { | |
1115 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
1116 | } | |
1117 | ||
1118 | ||
bea3348e SH |
1119 | /** |
1120 | * netif_oper_up - test if device is operational | |
1121 | * @dev: network device | |
1122 | * | |
1123 | * Check if carrier is operational | |
1124 | */ | |
b00055aa SR |
1125 | static inline int netif_oper_up(const struct net_device *dev) { |
1126 | return (dev->operstate == IF_OPER_UP || | |
1127 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
1128 | } | |
1129 | ||
bea3348e SH |
1130 | /** |
1131 | * netif_device_present - is device available or removed | |
1132 | * @dev: network device | |
1133 | * | |
1134 | * Check if device has not been removed from system. | |
1135 | */ | |
1da177e4 LT |
1136 | static inline int netif_device_present(struct net_device *dev) |
1137 | { | |
1138 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
1139 | } | |
1140 | ||
56079431 | 1141 | extern void netif_device_detach(struct net_device *dev); |
1da177e4 | 1142 | |
56079431 | 1143 | extern void netif_device_attach(struct net_device *dev); |
1da177e4 LT |
1144 | |
1145 | /* | |
1146 | * Network interface message level settings | |
1147 | */ | |
1148 | #define HAVE_NETIF_MSG 1 | |
1149 | ||
1150 | enum { | |
1151 | NETIF_MSG_DRV = 0x0001, | |
1152 | NETIF_MSG_PROBE = 0x0002, | |
1153 | NETIF_MSG_LINK = 0x0004, | |
1154 | NETIF_MSG_TIMER = 0x0008, | |
1155 | NETIF_MSG_IFDOWN = 0x0010, | |
1156 | NETIF_MSG_IFUP = 0x0020, | |
1157 | NETIF_MSG_RX_ERR = 0x0040, | |
1158 | NETIF_MSG_TX_ERR = 0x0080, | |
1159 | NETIF_MSG_TX_QUEUED = 0x0100, | |
1160 | NETIF_MSG_INTR = 0x0200, | |
1161 | NETIF_MSG_TX_DONE = 0x0400, | |
1162 | NETIF_MSG_RX_STATUS = 0x0800, | |
1163 | NETIF_MSG_PKTDATA = 0x1000, | |
1164 | NETIF_MSG_HW = 0x2000, | |
1165 | NETIF_MSG_WOL = 0x4000, | |
1166 | }; | |
1167 | ||
1168 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
1169 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
1170 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
1171 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
1172 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
1173 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
1174 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
1175 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
1176 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
1177 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
1178 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
1179 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
1180 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
1181 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
1182 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
1183 | ||
1184 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
1185 | { | |
1186 | /* use default */ | |
1187 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
1188 | return default_msg_enable_bits; | |
1189 | if (debug_value == 0) /* no output */ | |
1190 | return 0; | |
1191 | /* set low N bits */ | |
1192 | return (1 << debug_value) - 1; | |
1193 | } | |
1194 | ||
0a122576 | 1195 | /* Test if receive needs to be scheduled but only if up */ |
bea3348e SH |
1196 | static inline int netif_rx_schedule_prep(struct net_device *dev, |
1197 | struct napi_struct *napi) | |
1da177e4 | 1198 | { |
bea3348e | 1199 | return netif_running(dev) && napi_schedule_prep(napi); |
1da177e4 LT |
1200 | } |
1201 | ||
1202 | /* Add interface to tail of rx poll list. This assumes that _prep has | |
1203 | * already been called and returned 1. | |
1204 | */ | |
bea3348e SH |
1205 | static inline void __netif_rx_schedule(struct net_device *dev, |
1206 | struct napi_struct *napi) | |
1207 | { | |
1208 | dev_hold(dev); | |
1209 | __napi_schedule(napi); | |
1210 | } | |
1da177e4 LT |
1211 | |
1212 | /* Try to reschedule poll. Called by irq handler. */ | |
1213 | ||
bea3348e SH |
1214 | static inline void netif_rx_schedule(struct net_device *dev, |
1215 | struct napi_struct *napi) | |
1da177e4 | 1216 | { |
bea3348e SH |
1217 | if (netif_rx_schedule_prep(dev, napi)) |
1218 | __netif_rx_schedule(dev, napi); | |
1da177e4 LT |
1219 | } |
1220 | ||
bea3348e SH |
1221 | /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */ |
1222 | static inline int netif_rx_reschedule(struct net_device *dev, | |
1223 | struct napi_struct *napi) | |
1da177e4 | 1224 | { |
bea3348e SH |
1225 | if (napi_schedule_prep(napi)) { |
1226 | __netif_rx_schedule(dev, napi); | |
1da177e4 LT |
1227 | return 1; |
1228 | } | |
1229 | return 0; | |
1230 | } | |
1231 | ||
b0ba6667 HX |
1232 | /* same as netif_rx_complete, except that local_irq_save(flags) |
1233 | * has already been issued | |
1234 | */ | |
bea3348e SH |
1235 | static inline void __netif_rx_complete(struct net_device *dev, |
1236 | struct napi_struct *napi) | |
b0ba6667 | 1237 | { |
bea3348e SH |
1238 | __napi_complete(napi); |
1239 | dev_put(dev); | |
b0ba6667 HX |
1240 | } |
1241 | ||
1da177e4 LT |
1242 | /* Remove interface from poll list: it must be in the poll list |
1243 | * on current cpu. This primitive is called by dev->poll(), when | |
1244 | * it completes the work. The device cannot be out of poll list at this | |
1245 | * moment, it is BUG(). | |
1246 | */ | |
bea3348e SH |
1247 | static inline void netif_rx_complete(struct net_device *dev, |
1248 | struct napi_struct *napi) | |
1da177e4 LT |
1249 | { |
1250 | unsigned long flags; | |
1251 | ||
1252 | local_irq_save(flags); | |
bea3348e | 1253 | __netif_rx_complete(dev, napi); |
1da177e4 LT |
1254 | local_irq_restore(flags); |
1255 | } | |
1256 | ||
bea3348e SH |
1257 | /** |
1258 | * netif_tx_lock - grab network device transmit lock | |
1259 | * @dev: network device | |
1260 | * | |
1261 | * Get network device transmit lock | |
1262 | */ | |
932ff279 HX |
1263 | static inline void netif_tx_lock(struct net_device *dev) |
1264 | { | |
1265 | spin_lock(&dev->_xmit_lock); | |
1266 | dev->xmit_lock_owner = smp_processor_id(); | |
1267 | } | |
1268 | ||
1269 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
1270 | { | |
1271 | spin_lock_bh(&dev->_xmit_lock); | |
1272 | dev->xmit_lock_owner = smp_processor_id(); | |
1273 | } | |
1274 | ||
1275 | static inline int netif_tx_trylock(struct net_device *dev) | |
1276 | { | |
53c4b2cc HX |
1277 | int ok = spin_trylock(&dev->_xmit_lock); |
1278 | if (likely(ok)) | |
932ff279 | 1279 | dev->xmit_lock_owner = smp_processor_id(); |
53c4b2cc | 1280 | return ok; |
932ff279 HX |
1281 | } |
1282 | ||
1283 | static inline void netif_tx_unlock(struct net_device *dev) | |
1284 | { | |
1285 | dev->xmit_lock_owner = -1; | |
1286 | spin_unlock(&dev->_xmit_lock); | |
1287 | } | |
1288 | ||
1289 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
1290 | { | |
1291 | dev->xmit_lock_owner = -1; | |
1292 | spin_unlock_bh(&dev->_xmit_lock); | |
1293 | } | |
1294 | ||
1da177e4 LT |
1295 | static inline void netif_tx_disable(struct net_device *dev) |
1296 | { | |
932ff279 | 1297 | netif_tx_lock_bh(dev); |
1da177e4 | 1298 | netif_stop_queue(dev); |
932ff279 | 1299 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
1300 | } |
1301 | ||
1302 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ | |
1303 | ||
1304 | extern void ether_setup(struct net_device *dev); | |
1305 | ||
1306 | /* Support for loadable net-drivers */ | |
f25f4e44 PWJ |
1307 | extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, |
1308 | void (*setup)(struct net_device *), | |
1309 | unsigned int queue_count); | |
1310 | #define alloc_netdev(sizeof_priv, name, setup) \ | |
1311 | alloc_netdev_mq(sizeof_priv, name, setup, 1) | |
1da177e4 LT |
1312 | extern int register_netdev(struct net_device *dev); |
1313 | extern void unregister_netdev(struct net_device *dev); | |
4417da66 PM |
1314 | /* Functions used for secondary unicast and multicast support */ |
1315 | extern void dev_set_rx_mode(struct net_device *dev); | |
1316 | extern void __dev_set_rx_mode(struct net_device *dev); | |
1317 | extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen); | |
1318 | extern int dev_unicast_add(struct net_device *dev, void *addr, int alen); | |
1da177e4 LT |
1319 | extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); |
1320 | extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); | |
a0a400d7 PM |
1321 | extern int dev_mc_sync(struct net_device *to, struct net_device *from); |
1322 | extern void dev_mc_unsync(struct net_device *to, struct net_device *from); | |
61cbc2fc PM |
1323 | extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all); |
1324 | extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly); | |
1da177e4 LT |
1325 | extern void dev_set_promiscuity(struct net_device *dev, int inc); |
1326 | extern void dev_set_allmulti(struct net_device *dev, int inc); | |
1327 | extern void netdev_state_change(struct net_device *dev); | |
d8a33ac4 | 1328 | extern void netdev_features_change(struct net_device *dev); |
1da177e4 LT |
1329 | /* Load a device via the kmod */ |
1330 | extern void dev_load(const char *name); | |
1331 | extern void dev_mcast_init(void); | |
1332 | extern int netdev_max_backlog; | |
1333 | extern int weight_p; | |
1334 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); | |
84fa7933 | 1335 | extern int skb_checksum_help(struct sk_buff *skb); |
576a30eb | 1336 | extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); |
fb286bb2 HX |
1337 | #ifdef CONFIG_BUG |
1338 | extern void netdev_rx_csum_fault(struct net_device *dev); | |
1339 | #else | |
1340 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
1341 | { | |
1342 | } | |
1343 | #endif | |
1da177e4 LT |
1344 | /* rx skb timestamps */ |
1345 | extern void net_enable_timestamp(void); | |
1346 | extern void net_disable_timestamp(void); | |
1347 | ||
20380731 ACM |
1348 | #ifdef CONFIG_PROC_FS |
1349 | extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); | |
1350 | extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); | |
1351 | extern void dev_seq_stop(struct seq_file *seq, void *v); | |
1352 | #endif | |
1353 | ||
1354 | extern void linkwatch_run_queue(void); | |
1355 | ||
7f353bf2 HX |
1356 | extern int netdev_compute_features(unsigned long all, unsigned long one); |
1357 | ||
bcd76111 | 1358 | static inline int net_gso_ok(int features, int gso_type) |
576a30eb | 1359 | { |
bcd76111 | 1360 | int feature = gso_type << NETIF_F_GSO_SHIFT; |
d6b4991a | 1361 | return (features & feature) == feature; |
576a30eb HX |
1362 | } |
1363 | ||
bcd76111 HX |
1364 | static inline int skb_gso_ok(struct sk_buff *skb, int features) |
1365 | { | |
a430a43d | 1366 | return net_gso_ok(features, skb_shinfo(skb)->gso_type); |
bcd76111 HX |
1367 | } |
1368 | ||
7967168c HX |
1369 | static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) |
1370 | { | |
a430a43d HX |
1371 | return skb_is_gso(skb) && |
1372 | (!skb_gso_ok(skb, dev->features) || | |
84fa7933 | 1373 | unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); |
7967168c HX |
1374 | } |
1375 | ||
7ea49ed7 | 1376 | /* On bonding slaves other than the currently active slave, suppress |
f5b2b966 JV |
1377 | * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and |
1378 | * ARP on active-backup slaves with arp_validate enabled. | |
7ea49ed7 DM |
1379 | */ |
1380 | static inline int skb_bond_should_drop(struct sk_buff *skb) | |
1381 | { | |
1382 | struct net_device *dev = skb->dev; | |
1383 | struct net_device *master = dev->master; | |
1384 | ||
1385 | if (master && | |
1386 | (dev->priv_flags & IFF_SLAVE_INACTIVE)) { | |
f5b2b966 JV |
1387 | if ((dev->priv_flags & IFF_SLAVE_NEEDARP) && |
1388 | skb->protocol == __constant_htons(ETH_P_ARP)) | |
1389 | return 0; | |
1390 | ||
7ea49ed7 DM |
1391 | if (master->priv_flags & IFF_MASTER_ALB) { |
1392 | if (skb->pkt_type != PACKET_BROADCAST && | |
1393 | skb->pkt_type != PACKET_MULTICAST) | |
1394 | return 0; | |
1395 | } | |
1396 | if (master->priv_flags & IFF_MASTER_8023AD && | |
1397 | skb->protocol == __constant_htons(ETH_P_SLOW)) | |
1398 | return 0; | |
1399 | ||
1400 | return 1; | |
1401 | } | |
1402 | return 0; | |
1403 | } | |
1404 | ||
1da177e4 LT |
1405 | #endif /* __KERNEL__ */ |
1406 | ||
1407 | #endif /* _LINUX_DEV_H */ |