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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__ | |
33 | #include <asm/atomic.h> | |
34 | #include <asm/cache.h> | |
35 | #include <asm/byteorder.h> | |
36 | ||
1da177e4 LT |
37 | #include <linux/device.h> |
38 | #include <linux/percpu.h> | |
db217334 | 39 | #include <linux/dmaengine.h> |
1da177e4 LT |
40 | |
41 | struct divert_blk; | |
42 | struct vlan_group; | |
43 | struct ethtool_ops; | |
115c1d6e | 44 | struct netpoll_info; |
1da177e4 LT |
45 | /* source back-compat hooks */ |
46 | #define SET_ETHTOOL_OPS(netdev,ops) \ | |
47 | ( (netdev)->ethtool_ops = (ops) ) | |
48 | ||
49 | #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev | |
50 | functions are available. */ | |
51 | #define HAVE_FREE_NETDEV /* free_netdev() */ | |
52 | #define HAVE_NETDEV_PRIV /* netdev_priv() */ | |
53 | ||
54 | #define NET_XMIT_SUCCESS 0 | |
55 | #define NET_XMIT_DROP 1 /* skb dropped */ | |
56 | #define NET_XMIT_CN 2 /* congestion notification */ | |
57 | #define NET_XMIT_POLICED 3 /* skb is shot by police */ | |
58 | #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue; | |
59 | (TC use only - dev_queue_xmit | |
60 | returns this as NET_XMIT_SUCCESS) */ | |
61 | ||
62 | /* Backlog congestion levels */ | |
63 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
64 | #define NET_RX_DROP 1 /* packet dropped */ | |
65 | #define NET_RX_CN_LOW 2 /* storm alert, just in case */ | |
66 | #define NET_RX_CN_MOD 3 /* Storm on its way! */ | |
67 | #define NET_RX_CN_HIGH 4 /* The storm is here */ | |
68 | #define NET_RX_BAD 5 /* packet dropped due to kernel error */ | |
69 | ||
70 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) | |
71 | ||
72 | #endif | |
73 | ||
74 | #define MAX_ADDR_LEN 32 /* Largest hardware address length */ | |
75 | ||
76 | /* Driver transmit return codes */ | |
77 | #define NETDEV_TX_OK 0 /* driver took care of packet */ | |
78 | #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/ | |
79 | #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */ | |
80 | ||
81 | /* | |
82 | * Compute the worst case header length according to the protocols | |
83 | * used. | |
84 | */ | |
85 | ||
86 | #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR) | |
87 | #define LL_MAX_HEADER 32 | |
88 | #else | |
89 | #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) | |
90 | #define LL_MAX_HEADER 96 | |
91 | #else | |
92 | #define LL_MAX_HEADER 48 | |
93 | #endif | |
94 | #endif | |
95 | ||
96 | #if !defined(CONFIG_NET_IPIP) && \ | |
97 | !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) | |
98 | #define MAX_HEADER LL_MAX_HEADER | |
99 | #else | |
100 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
101 | #endif | |
102 | ||
103 | /* | |
104 | * Network device statistics. Akin to the 2.0 ether stats but | |
105 | * with byte counters. | |
106 | */ | |
107 | ||
108 | struct net_device_stats | |
109 | { | |
110 | unsigned long rx_packets; /* total packets received */ | |
111 | unsigned long tx_packets; /* total packets transmitted */ | |
112 | unsigned long rx_bytes; /* total bytes received */ | |
113 | unsigned long tx_bytes; /* total bytes transmitted */ | |
114 | unsigned long rx_errors; /* bad packets received */ | |
115 | unsigned long tx_errors; /* packet transmit problems */ | |
116 | unsigned long rx_dropped; /* no space in linux buffers */ | |
117 | unsigned long tx_dropped; /* no space available in linux */ | |
118 | unsigned long multicast; /* multicast packets received */ | |
119 | unsigned long collisions; | |
120 | ||
121 | /* detailed rx_errors: */ | |
122 | unsigned long rx_length_errors; | |
123 | unsigned long rx_over_errors; /* receiver ring buff overflow */ | |
124 | unsigned long rx_crc_errors; /* recved pkt with crc error */ | |
125 | unsigned long rx_frame_errors; /* recv'd frame alignment error */ | |
126 | unsigned long rx_fifo_errors; /* recv'r fifo overrun */ | |
127 | unsigned long rx_missed_errors; /* receiver missed packet */ | |
128 | ||
129 | /* detailed tx_errors */ | |
130 | unsigned long tx_aborted_errors; | |
131 | unsigned long tx_carrier_errors; | |
132 | unsigned long tx_fifo_errors; | |
133 | unsigned long tx_heartbeat_errors; | |
134 | unsigned long tx_window_errors; | |
135 | ||
136 | /* for cslip etc */ | |
137 | unsigned long rx_compressed; | |
138 | unsigned long tx_compressed; | |
139 | }; | |
140 | ||
141 | ||
142 | /* Media selection options. */ | |
143 | enum { | |
144 | IF_PORT_UNKNOWN = 0, | |
145 | IF_PORT_10BASE2, | |
146 | IF_PORT_10BASET, | |
147 | IF_PORT_AUI, | |
148 | IF_PORT_100BASET, | |
149 | IF_PORT_100BASETX, | |
150 | IF_PORT_100BASEFX | |
151 | }; | |
152 | ||
153 | #ifdef __KERNEL__ | |
154 | ||
155 | #include <linux/cache.h> | |
156 | #include <linux/skbuff.h> | |
157 | ||
158 | struct neighbour; | |
159 | struct neigh_parms; | |
160 | struct sk_buff; | |
161 | ||
162 | struct netif_rx_stats | |
163 | { | |
164 | unsigned total; | |
165 | unsigned dropped; | |
166 | unsigned time_squeeze; | |
1da177e4 LT |
167 | unsigned cpu_collision; |
168 | }; | |
169 | ||
170 | DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); | |
171 | ||
172 | ||
173 | /* | |
174 | * We tag multicasts with these structures. | |
175 | */ | |
176 | ||
177 | struct dev_mc_list | |
178 | { | |
179 | struct dev_mc_list *next; | |
180 | __u8 dmi_addr[MAX_ADDR_LEN]; | |
181 | unsigned char dmi_addrlen; | |
182 | int dmi_users; | |
183 | int dmi_gusers; | |
184 | }; | |
185 | ||
186 | struct hh_cache | |
187 | { | |
188 | struct hh_cache *hh_next; /* Next entry */ | |
189 | atomic_t hh_refcnt; /* number of users */ | |
190 | unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP | |
191 | * NOTE: For VLANs, this will be the | |
192 | * encapuslated type. --BLG | |
193 | */ | |
194 | int hh_len; /* length of header */ | |
195 | int (*hh_output)(struct sk_buff *skb); | |
196 | rwlock_t hh_lock; | |
197 | ||
198 | /* cached hardware header; allow for machine alignment needs. */ | |
199 | #define HH_DATA_MOD 16 | |
200 | #define HH_DATA_OFF(__len) \ | |
5ba0eac6 | 201 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
1da177e4 LT |
202 | #define HH_DATA_ALIGN(__len) \ |
203 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
204 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
205 | }; | |
206 | ||
207 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
208 | * Alternative is: | |
209 | * dev->hard_header_len ? (dev->hard_header_len + | |
210 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
211 | * | |
212 | * We could use other alignment values, but we must maintain the | |
213 | * relationship HH alignment <= LL alignment. | |
214 | */ | |
215 | #define LL_RESERVED_SPACE(dev) \ | |
216 | (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
217 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ | |
218 | ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
219 | ||
220 | /* These flag bits are private to the generic network queueing | |
221 | * layer, they may not be explicitly referenced by any other | |
222 | * code. | |
223 | */ | |
224 | ||
225 | enum netdev_state_t | |
226 | { | |
227 | __LINK_STATE_XOFF=0, | |
228 | __LINK_STATE_START, | |
229 | __LINK_STATE_PRESENT, | |
230 | __LINK_STATE_SCHED, | |
231 | __LINK_STATE_NOCARRIER, | |
232 | __LINK_STATE_RX_SCHED, | |
b00055aa SR |
233 | __LINK_STATE_LINKWATCH_PENDING, |
234 | __LINK_STATE_DORMANT, | |
48d83325 | 235 | __LINK_STATE_QDISC_RUNNING, |
1da177e4 LT |
236 | }; |
237 | ||
238 | ||
239 | /* | |
240 | * This structure holds at boot time configured netdevice settings. They | |
241 | * are then used in the device probing. | |
242 | */ | |
243 | struct netdev_boot_setup { | |
244 | char name[IFNAMSIZ]; | |
245 | struct ifmap map; | |
246 | }; | |
247 | #define NETDEV_BOOT_SETUP_MAX 8 | |
248 | ||
20380731 | 249 | extern int __init netdev_boot_setup(char *str); |
1da177e4 LT |
250 | |
251 | /* | |
252 | * The DEVICE structure. | |
253 | * Actually, this whole structure is a big mistake. It mixes I/O | |
254 | * data with strictly "high-level" data, and it has to know about | |
255 | * almost every data structure used in the INET module. | |
256 | * | |
257 | * FIXME: cleanup struct net_device such that network protocol info | |
258 | * moves out. | |
259 | */ | |
260 | ||
261 | struct net_device | |
262 | { | |
263 | ||
264 | /* | |
265 | * This is the first field of the "visible" part of this structure | |
266 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
267 | * the interface. | |
268 | */ | |
269 | char name[IFNAMSIZ]; | |
9356b8fc ED |
270 | /* device name hash chain */ |
271 | struct hlist_node name_hlist; | |
1da177e4 LT |
272 | |
273 | /* | |
274 | * I/O specific fields | |
275 | * FIXME: Merge these and struct ifmap into one | |
276 | */ | |
277 | unsigned long mem_end; /* shared mem end */ | |
278 | unsigned long mem_start; /* shared mem start */ | |
279 | unsigned long base_addr; /* device I/O address */ | |
280 | unsigned int irq; /* device IRQ number */ | |
281 | ||
282 | /* | |
283 | * Some hardware also needs these fields, but they are not | |
284 | * part of the usual set specified in Space.c. | |
285 | */ | |
286 | ||
287 | unsigned char if_port; /* Selectable AUI, TP,..*/ | |
288 | unsigned char dma; /* DMA channel */ | |
289 | ||
290 | unsigned long state; | |
291 | ||
292 | struct net_device *next; | |
293 | ||
294 | /* The device initialization function. Called only once. */ | |
295 | int (*init)(struct net_device *dev); | |
296 | ||
297 | /* ------- Fields preinitialized in Space.c finish here ------- */ | |
298 | ||
9356b8fc ED |
299 | /* Net device features */ |
300 | unsigned long features; | |
301 | #define NETIF_F_SG 1 /* Scatter/gather IO. */ | |
302 | #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */ | |
303 | #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ | |
304 | #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ | |
305 | #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ | |
306 | #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ | |
307 | #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ | |
308 | #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ | |
309 | #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ | |
310 | #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ | |
9356b8fc | 311 | #define NETIF_F_LLTX 4096 /* LockLess TX */ |
7967168c HX |
312 | |
313 | /* Segmentation offload features */ | |
314 | #define NETIF_F_GSO_SHIFT 16 | |
315 | #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) | |
316 | #define NETIF_F_UFO (SKB_GSO_UDPV4 << NETIF_F_GSO_SHIFT) | |
9356b8fc | 317 | |
8648b305 HX |
318 | #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) |
319 | #define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM) | |
320 | ||
1da177e4 LT |
321 | struct net_device *next_sched; |
322 | ||
323 | /* Interface index. Unique device identifier */ | |
324 | int ifindex; | |
325 | int iflink; | |
326 | ||
327 | ||
328 | struct net_device_stats* (*get_stats)(struct net_device *dev); | |
329 | struct iw_statistics* (*get_wireless_stats)(struct net_device *dev); | |
330 | ||
331 | /* List of functions to handle Wireless Extensions (instead of ioctl). | |
332 | * See <net/iw_handler.h> for details. Jean II */ | |
333 | const struct iw_handler_def * wireless_handlers; | |
334 | /* Instance data managed by the core of Wireless Extensions. */ | |
335 | struct iw_public_data * wireless_data; | |
336 | ||
337 | struct ethtool_ops *ethtool_ops; | |
338 | ||
339 | /* | |
340 | * This marks the end of the "visible" part of the structure. All | |
341 | * fields hereafter are internal to the system, and may change at | |
342 | * will (read: may be cleaned up at will). | |
343 | */ | |
344 | ||
1da177e4 | 345 | |
b00055aa | 346 | unsigned int flags; /* interface flags (a la BSD) */ |
1da177e4 LT |
347 | unsigned short gflags; |
348 | unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ | |
349 | unsigned short padded; /* How much padding added by alloc_netdev() */ | |
350 | ||
b00055aa SR |
351 | unsigned char operstate; /* RFC2863 operstate */ |
352 | unsigned char link_mode; /* mapping policy to operstate */ | |
353 | ||
1da177e4 LT |
354 | unsigned mtu; /* interface MTU value */ |
355 | unsigned short type; /* interface hardware type */ | |
356 | unsigned short hard_header_len; /* hardware hdr length */ | |
1da177e4 LT |
357 | |
358 | struct net_device *master; /* Pointer to master device of a group, | |
359 | * which this device is member of. | |
360 | */ | |
361 | ||
362 | /* Interface address info. */ | |
a6f9a705 | 363 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
1da177e4 LT |
364 | unsigned char addr_len; /* hardware address length */ |
365 | unsigned short dev_id; /* for shared network cards */ | |
366 | ||
367 | struct dev_mc_list *mc_list; /* Multicast mac addresses */ | |
368 | int mc_count; /* Number of installed mcasts */ | |
369 | int promiscuity; | |
370 | int allmulti; | |
371 | ||
1da177e4 LT |
372 | |
373 | /* Protocol specific pointers */ | |
374 | ||
375 | void *atalk_ptr; /* AppleTalk link */ | |
376 | void *ip_ptr; /* IPv4 specific data */ | |
377 | void *dn_ptr; /* DECnet specific data */ | |
378 | void *ip6_ptr; /* IPv6 specific data */ | |
379 | void *ec_ptr; /* Econet specific data */ | |
380 | void *ax25_ptr; /* AX.25 specific data */ | |
381 | ||
9356b8fc ED |
382 | /* |
383 | * Cache line mostly used on receive path (including eth_type_trans()) | |
384 | */ | |
385 | struct list_head poll_list ____cacheline_aligned_in_smp; | |
386 | /* Link to poll list */ | |
387 | ||
388 | int (*poll) (struct net_device *dev, int *quota); | |
1da177e4 LT |
389 | int quota; |
390 | int weight; | |
9356b8fc ED |
391 | unsigned long last_rx; /* Time of last Rx */ |
392 | /* Interface address info used in eth_type_trans() */ | |
393 | unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast | |
394 | because most packets are unicast) */ | |
395 | ||
396 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ | |
1da177e4 | 397 | |
9356b8fc ED |
398 | /* |
399 | * Cache line mostly used on queue transmit path (qdisc) | |
400 | */ | |
401 | /* device queue lock */ | |
402 | spinlock_t queue_lock ____cacheline_aligned_in_smp; | |
1da177e4 LT |
403 | struct Qdisc *qdisc; |
404 | struct Qdisc *qdisc_sleeping; | |
1da177e4 LT |
405 | struct list_head qdisc_list; |
406 | unsigned long tx_queue_len; /* Max frames per queue allowed */ | |
407 | ||
408 | /* ingress path synchronizer */ | |
409 | spinlock_t ingress_lock; | |
9356b8fc ED |
410 | struct Qdisc *qdisc_ingress; |
411 | ||
412 | /* | |
413 | * One part is mostly used on xmit path (device) | |
414 | */ | |
1da177e4 | 415 | /* hard_start_xmit synchronizer */ |
932ff279 | 416 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; |
1da177e4 LT |
417 | /* cpu id of processor entered to hard_start_xmit or -1, |
418 | if nobody entered there. | |
419 | */ | |
420 | int xmit_lock_owner; | |
9356b8fc ED |
421 | void *priv; /* pointer to private data */ |
422 | int (*hard_start_xmit) (struct sk_buff *skb, | |
423 | struct net_device *dev); | |
424 | /* These may be needed for future network-power-down code. */ | |
425 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ | |
426 | ||
427 | int watchdog_timeo; /* used by dev_watchdog() */ | |
428 | struct timer_list watchdog_timer; | |
429 | ||
430 | /* | |
431 | * refcnt is a very hot point, so align it on SMP | |
432 | */ | |
1da177e4 | 433 | /* Number of references to this device */ |
9356b8fc ED |
434 | atomic_t refcnt ____cacheline_aligned_in_smp; |
435 | ||
1da177e4 LT |
436 | /* delayed register/unregister */ |
437 | struct list_head todo_list; | |
1da177e4 LT |
438 | /* device index hash chain */ |
439 | struct hlist_node index_hlist; | |
440 | ||
441 | /* register/unregister state machine */ | |
442 | enum { NETREG_UNINITIALIZED=0, | |
b17a7c17 | 443 | NETREG_REGISTERED, /* completed register_netdevice */ |
1da177e4 LT |
444 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
445 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
446 | NETREG_RELEASED, /* called free_netdev */ | |
447 | } reg_state; | |
448 | ||
1da177e4 LT |
449 | /* Called after device is detached from network. */ |
450 | void (*uninit)(struct net_device *dev); | |
451 | /* Called after last user reference disappears. */ | |
452 | void (*destructor)(struct net_device *dev); | |
453 | ||
454 | /* Pointers to interface service routines. */ | |
455 | int (*open)(struct net_device *dev); | |
456 | int (*stop)(struct net_device *dev); | |
1da177e4 | 457 | #define HAVE_NETDEV_POLL |
1da177e4 LT |
458 | int (*hard_header) (struct sk_buff *skb, |
459 | struct net_device *dev, | |
460 | unsigned short type, | |
461 | void *daddr, | |
462 | void *saddr, | |
463 | unsigned len); | |
464 | int (*rebuild_header)(struct sk_buff *skb); | |
465 | #define HAVE_MULTICAST | |
466 | void (*set_multicast_list)(struct net_device *dev); | |
467 | #define HAVE_SET_MAC_ADDR | |
468 | int (*set_mac_address)(struct net_device *dev, | |
469 | void *addr); | |
470 | #define HAVE_PRIVATE_IOCTL | |
471 | int (*do_ioctl)(struct net_device *dev, | |
472 | struct ifreq *ifr, int cmd); | |
473 | #define HAVE_SET_CONFIG | |
474 | int (*set_config)(struct net_device *dev, | |
475 | struct ifmap *map); | |
476 | #define HAVE_HEADER_CACHE | |
477 | int (*hard_header_cache)(struct neighbour *neigh, | |
478 | struct hh_cache *hh); | |
479 | void (*header_cache_update)(struct hh_cache *hh, | |
480 | struct net_device *dev, | |
481 | unsigned char * haddr); | |
482 | #define HAVE_CHANGE_MTU | |
483 | int (*change_mtu)(struct net_device *dev, int new_mtu); | |
484 | ||
485 | #define HAVE_TX_TIMEOUT | |
486 | void (*tx_timeout) (struct net_device *dev); | |
487 | ||
488 | void (*vlan_rx_register)(struct net_device *dev, | |
489 | struct vlan_group *grp); | |
490 | void (*vlan_rx_add_vid)(struct net_device *dev, | |
491 | unsigned short vid); | |
492 | void (*vlan_rx_kill_vid)(struct net_device *dev, | |
493 | unsigned short vid); | |
494 | ||
495 | int (*hard_header_parse)(struct sk_buff *skb, | |
496 | unsigned char *haddr); | |
497 | int (*neigh_setup)(struct net_device *dev, struct neigh_parms *); | |
498 | #ifdef CONFIG_NETPOLL | |
115c1d6e | 499 | struct netpoll_info *npinfo; |
1da177e4 LT |
500 | #endif |
501 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
502 | void (*poll_controller)(struct net_device *dev); | |
503 | #endif | |
504 | ||
505 | /* bridge stuff */ | |
506 | struct net_bridge_port *br_port; | |
507 | ||
508 | #ifdef CONFIG_NET_DIVERT | |
509 | /* this will get initialized at each interface type init routine */ | |
510 | struct divert_blk *divert; | |
511 | #endif /* CONFIG_NET_DIVERT */ | |
512 | ||
513 | /* class/net/name entry */ | |
514 | struct class_device class_dev; | |
fe9925b5 SH |
515 | /* space for optional statistics and wireless sysfs groups */ |
516 | struct attribute_group *sysfs_groups[3]; | |
1da177e4 LT |
517 | }; |
518 | ||
519 | #define NETDEV_ALIGN 32 | |
520 | #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) | |
521 | ||
522 | static inline void *netdev_priv(struct net_device *dev) | |
523 | { | |
524 | return (char *)dev + ((sizeof(struct net_device) | |
525 | + NETDEV_ALIGN_CONST) | |
526 | & ~NETDEV_ALIGN_CONST); | |
527 | } | |
528 | ||
529 | #define SET_MODULE_OWNER(dev) do { } while (0) | |
530 | /* Set the sysfs physical device reference for the network logical device | |
531 | * if set prior to registration will cause a symlink during initialization. | |
532 | */ | |
533 | #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev)) | |
534 | ||
535 | struct packet_type { | |
f2ccd8fa DM |
536 | __be16 type; /* This is really htons(ether_type). */ |
537 | struct net_device *dev; /* NULL is wildcarded here */ | |
538 | int (*func) (struct sk_buff *, | |
539 | struct net_device *, | |
540 | struct packet_type *, | |
541 | struct net_device *); | |
1da177e4 LT |
542 | void *af_packet_priv; |
543 | struct list_head list; | |
544 | }; | |
545 | ||
546 | #include <linux/interrupt.h> | |
547 | #include <linux/notifier.h> | |
548 | ||
549 | extern struct net_device loopback_dev; /* The loopback */ | |
550 | extern struct net_device *dev_base; /* All devices */ | |
551 | extern rwlock_t dev_base_lock; /* Device list lock */ | |
552 | ||
553 | extern int netdev_boot_setup_check(struct net_device *dev); | |
554 | extern unsigned long netdev_boot_base(const char *prefix, int unit); | |
555 | extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr); | |
556 | extern struct net_device *dev_getfirstbyhwtype(unsigned short type); | |
557 | extern void dev_add_pack(struct packet_type *pt); | |
558 | extern void dev_remove_pack(struct packet_type *pt); | |
559 | extern void __dev_remove_pack(struct packet_type *pt); | |
560 | ||
561 | extern struct net_device *dev_get_by_flags(unsigned short flags, | |
562 | unsigned short mask); | |
563 | extern struct net_device *dev_get_by_name(const char *name); | |
564 | extern struct net_device *__dev_get_by_name(const char *name); | |
565 | extern int dev_alloc_name(struct net_device *dev, const char *name); | |
566 | extern int dev_open(struct net_device *dev); | |
567 | extern int dev_close(struct net_device *dev); | |
568 | extern int dev_queue_xmit(struct sk_buff *skb); | |
569 | extern int register_netdevice(struct net_device *dev); | |
570 | extern int unregister_netdevice(struct net_device *dev); | |
571 | extern void free_netdev(struct net_device *dev); | |
572 | extern void synchronize_net(void); | |
573 | extern int register_netdevice_notifier(struct notifier_block *nb); | |
574 | extern int unregister_netdevice_notifier(struct notifier_block *nb); | |
575 | extern int call_netdevice_notifiers(unsigned long val, void *v); | |
576 | extern struct net_device *dev_get_by_index(int ifindex); | |
577 | extern struct net_device *__dev_get_by_index(int ifindex); | |
578 | extern int dev_restart(struct net_device *dev); | |
579 | #ifdef CONFIG_NETPOLL_TRAP | |
580 | extern int netpoll_trap(void); | |
581 | #endif | |
582 | ||
583 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); | |
584 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); | |
585 | static inline int unregister_gifconf(unsigned int family) | |
586 | { | |
587 | return register_gifconf(family, NULL); | |
588 | } | |
589 | ||
590 | /* | |
591 | * Incoming packets are placed on per-cpu queues so that | |
592 | * no locking is needed. | |
593 | */ | |
594 | ||
595 | struct softnet_data | |
596 | { | |
31aa02c5 | 597 | struct net_device *output_queue; |
1da177e4 LT |
598 | struct sk_buff_head input_pkt_queue; |
599 | struct list_head poll_list; | |
1da177e4 LT |
600 | struct sk_buff *completion_queue; |
601 | ||
602 | struct net_device backlog_dev; /* Sorry. 8) */ | |
db217334 CL |
603 | #ifdef CONFIG_NET_DMA |
604 | struct dma_chan *net_dma; | |
605 | #endif | |
1da177e4 LT |
606 | }; |
607 | ||
608 | DECLARE_PER_CPU(struct softnet_data,softnet_data); | |
609 | ||
610 | #define HAVE_NETIF_QUEUE | |
611 | ||
56079431 | 612 | extern void __netif_schedule(struct net_device *dev); |
1da177e4 LT |
613 | |
614 | static inline void netif_schedule(struct net_device *dev) | |
615 | { | |
616 | if (!test_bit(__LINK_STATE_XOFF, &dev->state)) | |
617 | __netif_schedule(dev); | |
618 | } | |
619 | ||
620 | static inline void netif_start_queue(struct net_device *dev) | |
621 | { | |
622 | clear_bit(__LINK_STATE_XOFF, &dev->state); | |
623 | } | |
624 | ||
625 | static inline void netif_wake_queue(struct net_device *dev) | |
626 | { | |
627 | #ifdef CONFIG_NETPOLL_TRAP | |
628 | if (netpoll_trap()) | |
629 | return; | |
630 | #endif | |
631 | if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state)) | |
632 | __netif_schedule(dev); | |
633 | } | |
634 | ||
635 | static inline void netif_stop_queue(struct net_device *dev) | |
636 | { | |
637 | #ifdef CONFIG_NETPOLL_TRAP | |
638 | if (netpoll_trap()) | |
639 | return; | |
640 | #endif | |
641 | set_bit(__LINK_STATE_XOFF, &dev->state); | |
642 | } | |
643 | ||
644 | static inline int netif_queue_stopped(const struct net_device *dev) | |
645 | { | |
646 | return test_bit(__LINK_STATE_XOFF, &dev->state); | |
647 | } | |
648 | ||
649 | static inline int netif_running(const struct net_device *dev) | |
650 | { | |
651 | return test_bit(__LINK_STATE_START, &dev->state); | |
652 | } | |
653 | ||
654 | ||
655 | /* Use this variant when it is known for sure that it | |
656 | * is executing from interrupt context. | |
657 | */ | |
658 | static inline void dev_kfree_skb_irq(struct sk_buff *skb) | |
659 | { | |
660 | if (atomic_dec_and_test(&skb->users)) { | |
661 | struct softnet_data *sd; | |
662 | unsigned long flags; | |
663 | ||
664 | local_irq_save(flags); | |
665 | sd = &__get_cpu_var(softnet_data); | |
666 | skb->next = sd->completion_queue; | |
667 | sd->completion_queue = skb; | |
668 | raise_softirq_irqoff(NET_TX_SOFTIRQ); | |
669 | local_irq_restore(flags); | |
670 | } | |
671 | } | |
672 | ||
673 | /* Use this variant in places where it could be invoked | |
674 | * either from interrupt or non-interrupt context. | |
675 | */ | |
56079431 | 676 | extern void dev_kfree_skb_any(struct sk_buff *skb); |
1da177e4 LT |
677 | |
678 | #define HAVE_NETIF_RX 1 | |
679 | extern int netif_rx(struct sk_buff *skb); | |
680 | extern int netif_rx_ni(struct sk_buff *skb); | |
681 | #define HAVE_NETIF_RECEIVE_SKB 1 | |
682 | extern int netif_receive_skb(struct sk_buff *skb); | |
c2373ee9 | 683 | extern int dev_valid_name(const char *name); |
1da177e4 LT |
684 | extern int dev_ioctl(unsigned int cmd, void __user *); |
685 | extern int dev_ethtool(struct ifreq *); | |
686 | extern unsigned dev_get_flags(const struct net_device *); | |
687 | extern int dev_change_flags(struct net_device *, unsigned); | |
688 | extern int dev_change_name(struct net_device *, char *); | |
689 | extern int dev_set_mtu(struct net_device *, int); | |
690 | extern int dev_set_mac_address(struct net_device *, | |
691 | struct sockaddr *); | |
692 | extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev); | |
693 | ||
694 | extern void dev_init(void); | |
695 | ||
696 | extern int netdev_nit; | |
20380731 | 697 | extern int netdev_budget; |
1da177e4 LT |
698 | |
699 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
700 | extern void netdev_run_todo(void); | |
701 | ||
702 | static inline void dev_put(struct net_device *dev) | |
703 | { | |
704 | atomic_dec(&dev->refcnt); | |
705 | } | |
706 | ||
15333061 SH |
707 | static inline void dev_hold(struct net_device *dev) |
708 | { | |
709 | atomic_inc(&dev->refcnt); | |
710 | } | |
1da177e4 LT |
711 | |
712 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
713 | * and _off may be called from IRQ context, but it is caller | |
714 | * who is responsible for serialization of these calls. | |
b00055aa SR |
715 | * |
716 | * The name carrier is inappropriate, these functions should really be | |
717 | * called netif_lowerlayer_*() because they represent the state of any | |
718 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
719 | */ |
720 | ||
721 | extern void linkwatch_fire_event(struct net_device *dev); | |
722 | ||
723 | static inline int netif_carrier_ok(const struct net_device *dev) | |
724 | { | |
725 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
726 | } | |
727 | ||
728 | extern void __netdev_watchdog_up(struct net_device *dev); | |
729 | ||
0a242efc | 730 | extern void netif_carrier_on(struct net_device *dev); |
1da177e4 | 731 | |
0a242efc | 732 | extern void netif_carrier_off(struct net_device *dev); |
1da177e4 | 733 | |
b00055aa SR |
734 | static inline void netif_dormant_on(struct net_device *dev) |
735 | { | |
736 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
737 | linkwatch_fire_event(dev); | |
738 | } | |
739 | ||
740 | static inline void netif_dormant_off(struct net_device *dev) | |
741 | { | |
742 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
743 | linkwatch_fire_event(dev); | |
744 | } | |
745 | ||
746 | static inline int netif_dormant(const struct net_device *dev) | |
747 | { | |
748 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
749 | } | |
750 | ||
751 | ||
752 | static inline int netif_oper_up(const struct net_device *dev) { | |
753 | return (dev->operstate == IF_OPER_UP || | |
754 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
755 | } | |
756 | ||
1da177e4 LT |
757 | /* Hot-plugging. */ |
758 | static inline int netif_device_present(struct net_device *dev) | |
759 | { | |
760 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
761 | } | |
762 | ||
56079431 | 763 | extern void netif_device_detach(struct net_device *dev); |
1da177e4 | 764 | |
56079431 | 765 | extern void netif_device_attach(struct net_device *dev); |
1da177e4 LT |
766 | |
767 | /* | |
768 | * Network interface message level settings | |
769 | */ | |
770 | #define HAVE_NETIF_MSG 1 | |
771 | ||
772 | enum { | |
773 | NETIF_MSG_DRV = 0x0001, | |
774 | NETIF_MSG_PROBE = 0x0002, | |
775 | NETIF_MSG_LINK = 0x0004, | |
776 | NETIF_MSG_TIMER = 0x0008, | |
777 | NETIF_MSG_IFDOWN = 0x0010, | |
778 | NETIF_MSG_IFUP = 0x0020, | |
779 | NETIF_MSG_RX_ERR = 0x0040, | |
780 | NETIF_MSG_TX_ERR = 0x0080, | |
781 | NETIF_MSG_TX_QUEUED = 0x0100, | |
782 | NETIF_MSG_INTR = 0x0200, | |
783 | NETIF_MSG_TX_DONE = 0x0400, | |
784 | NETIF_MSG_RX_STATUS = 0x0800, | |
785 | NETIF_MSG_PKTDATA = 0x1000, | |
786 | NETIF_MSG_HW = 0x2000, | |
787 | NETIF_MSG_WOL = 0x4000, | |
788 | }; | |
789 | ||
790 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
791 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
792 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
793 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
794 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
795 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
796 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
797 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
798 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
799 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
800 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
801 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
802 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
803 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
804 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
805 | ||
806 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
807 | { | |
808 | /* use default */ | |
809 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
810 | return default_msg_enable_bits; | |
811 | if (debug_value == 0) /* no output */ | |
812 | return 0; | |
813 | /* set low N bits */ | |
814 | return (1 << debug_value) - 1; | |
815 | } | |
816 | ||
0a122576 SH |
817 | /* Test if receive needs to be scheduled */ |
818 | static inline int __netif_rx_schedule_prep(struct net_device *dev) | |
793b883e SH |
819 | { |
820 | return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state); | |
821 | } | |
1da177e4 | 822 | |
0a122576 | 823 | /* Test if receive needs to be scheduled but only if up */ |
1da177e4 LT |
824 | static inline int netif_rx_schedule_prep(struct net_device *dev) |
825 | { | |
0a122576 | 826 | return netif_running(dev) && __netif_rx_schedule_prep(dev); |
1da177e4 LT |
827 | } |
828 | ||
829 | /* Add interface to tail of rx poll list. This assumes that _prep has | |
830 | * already been called and returned 1. | |
831 | */ | |
832 | ||
56079431 | 833 | extern void __netif_rx_schedule(struct net_device *dev); |
1da177e4 LT |
834 | |
835 | /* Try to reschedule poll. Called by irq handler. */ | |
836 | ||
837 | static inline void netif_rx_schedule(struct net_device *dev) | |
838 | { | |
839 | if (netif_rx_schedule_prep(dev)) | |
840 | __netif_rx_schedule(dev); | |
841 | } | |
842 | ||
d3240312 SH |
843 | /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). |
844 | * Do not inline this? | |
845 | */ | |
1da177e4 LT |
846 | static inline int netif_rx_reschedule(struct net_device *dev, int undo) |
847 | { | |
848 | if (netif_rx_schedule_prep(dev)) { | |
849 | unsigned long flags; | |
d3240312 SH |
850 | |
851 | dev->quota += undo; | |
852 | ||
1da177e4 | 853 | local_irq_save(flags); |
d3240312 SH |
854 | list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list); |
855 | __raise_softirq_irqoff(NET_RX_SOFTIRQ); | |
1da177e4 LT |
856 | local_irq_restore(flags); |
857 | return 1; | |
858 | } | |
859 | return 0; | |
860 | } | |
861 | ||
862 | /* Remove interface from poll list: it must be in the poll list | |
863 | * on current cpu. This primitive is called by dev->poll(), when | |
864 | * it completes the work. The device cannot be out of poll list at this | |
865 | * moment, it is BUG(). | |
866 | */ | |
867 | static inline void netif_rx_complete(struct net_device *dev) | |
868 | { | |
869 | unsigned long flags; | |
870 | ||
871 | local_irq_save(flags); | |
872 | BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state)); | |
873 | list_del(&dev->poll_list); | |
874 | smp_mb__before_clear_bit(); | |
875 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); | |
876 | local_irq_restore(flags); | |
877 | } | |
878 | ||
879 | static inline void netif_poll_disable(struct net_device *dev) | |
880 | { | |
3173c890 | 881 | while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state)) |
1da177e4 | 882 | /* No hurry. */ |
3173c890 | 883 | schedule_timeout_interruptible(1); |
1da177e4 LT |
884 | } |
885 | ||
886 | static inline void netif_poll_enable(struct net_device *dev) | |
887 | { | |
888 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); | |
889 | } | |
890 | ||
891 | /* same as netif_rx_complete, except that local_irq_save(flags) | |
892 | * has already been issued | |
893 | */ | |
894 | static inline void __netif_rx_complete(struct net_device *dev) | |
895 | { | |
896 | BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state)); | |
897 | list_del(&dev->poll_list); | |
898 | smp_mb__before_clear_bit(); | |
899 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); | |
900 | } | |
901 | ||
932ff279 HX |
902 | static inline void netif_tx_lock(struct net_device *dev) |
903 | { | |
904 | spin_lock(&dev->_xmit_lock); | |
905 | dev->xmit_lock_owner = smp_processor_id(); | |
906 | } | |
907 | ||
908 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
909 | { | |
910 | spin_lock_bh(&dev->_xmit_lock); | |
911 | dev->xmit_lock_owner = smp_processor_id(); | |
912 | } | |
913 | ||
914 | static inline int netif_tx_trylock(struct net_device *dev) | |
915 | { | |
916 | int err = spin_trylock(&dev->_xmit_lock); | |
917 | if (!err) | |
918 | dev->xmit_lock_owner = smp_processor_id(); | |
919 | return err; | |
920 | } | |
921 | ||
922 | static inline void netif_tx_unlock(struct net_device *dev) | |
923 | { | |
924 | dev->xmit_lock_owner = -1; | |
925 | spin_unlock(&dev->_xmit_lock); | |
926 | } | |
927 | ||
928 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
929 | { | |
930 | dev->xmit_lock_owner = -1; | |
931 | spin_unlock_bh(&dev->_xmit_lock); | |
932 | } | |
933 | ||
1da177e4 LT |
934 | static inline void netif_tx_disable(struct net_device *dev) |
935 | { | |
932ff279 | 936 | netif_tx_lock_bh(dev); |
1da177e4 | 937 | netif_stop_queue(dev); |
932ff279 | 938 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
939 | } |
940 | ||
941 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ | |
942 | ||
943 | extern void ether_setup(struct net_device *dev); | |
944 | ||
945 | /* Support for loadable net-drivers */ | |
946 | extern struct net_device *alloc_netdev(int sizeof_priv, const char *name, | |
947 | void (*setup)(struct net_device *)); | |
948 | extern int register_netdev(struct net_device *dev); | |
949 | extern void unregister_netdev(struct net_device *dev); | |
950 | /* Functions used for multicast support */ | |
951 | extern void dev_mc_upload(struct net_device *dev); | |
952 | extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); | |
953 | extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); | |
954 | extern void dev_mc_discard(struct net_device *dev); | |
955 | extern void dev_set_promiscuity(struct net_device *dev, int inc); | |
956 | extern void dev_set_allmulti(struct net_device *dev, int inc); | |
957 | extern void netdev_state_change(struct net_device *dev); | |
d8a33ac4 | 958 | extern void netdev_features_change(struct net_device *dev); |
1da177e4 LT |
959 | /* Load a device via the kmod */ |
960 | extern void dev_load(const char *name); | |
961 | extern void dev_mcast_init(void); | |
962 | extern int netdev_max_backlog; | |
963 | extern int weight_p; | |
964 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); | |
965 | extern int skb_checksum_help(struct sk_buff *skb, int inward); | |
fb286bb2 HX |
966 | #ifdef CONFIG_BUG |
967 | extern void netdev_rx_csum_fault(struct net_device *dev); | |
968 | #else | |
969 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
970 | { | |
971 | } | |
972 | #endif | |
1da177e4 LT |
973 | /* rx skb timestamps */ |
974 | extern void net_enable_timestamp(void); | |
975 | extern void net_disable_timestamp(void); | |
976 | ||
20380731 ACM |
977 | #ifdef CONFIG_PROC_FS |
978 | extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); | |
979 | extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); | |
980 | extern void dev_seq_stop(struct seq_file *seq, void *v); | |
981 | #endif | |
982 | ||
983 | extern void linkwatch_run_queue(void); | |
984 | ||
7967168c HX |
985 | static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) |
986 | { | |
987 | int feature = skb_shinfo(skb)->gso_type << NETIF_F_GSO_SHIFT; | |
988 | return skb_shinfo(skb)->gso_size && | |
989 | (dev->features & feature) != feature; | |
990 | } | |
991 | ||
1da177e4 LT |
992 | #endif /* __KERNEL__ */ |
993 | ||
994 | #endif /* _LINUX_DEV_H */ |