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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> | |
39 | ||
40 | struct divert_blk; | |
41 | struct vlan_group; | |
42 | struct ethtool_ops; | |
115c1d6e | 43 | struct netpoll_info; |
1da177e4 LT |
44 | /* source back-compat hooks */ |
45 | #define SET_ETHTOOL_OPS(netdev,ops) \ | |
46 | ( (netdev)->ethtool_ops = (ops) ) | |
47 | ||
48 | #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev | |
49 | functions are available. */ | |
50 | #define HAVE_FREE_NETDEV /* free_netdev() */ | |
51 | #define HAVE_NETDEV_PRIV /* netdev_priv() */ | |
52 | ||
53 | #define NET_XMIT_SUCCESS 0 | |
54 | #define NET_XMIT_DROP 1 /* skb dropped */ | |
55 | #define NET_XMIT_CN 2 /* congestion notification */ | |
56 | #define NET_XMIT_POLICED 3 /* skb is shot by police */ | |
57 | #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue; | |
58 | (TC use only - dev_queue_xmit | |
59 | returns this as NET_XMIT_SUCCESS) */ | |
60 | ||
61 | /* Backlog congestion levels */ | |
62 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
63 | #define NET_RX_DROP 1 /* packet dropped */ | |
64 | #define NET_RX_CN_LOW 2 /* storm alert, just in case */ | |
65 | #define NET_RX_CN_MOD 3 /* Storm on its way! */ | |
66 | #define NET_RX_CN_HIGH 4 /* The storm is here */ | |
67 | #define NET_RX_BAD 5 /* packet dropped due to kernel error */ | |
68 | ||
69 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) | |
70 | ||
71 | #endif | |
72 | ||
73 | #define MAX_ADDR_LEN 32 /* Largest hardware address length */ | |
74 | ||
75 | /* Driver transmit return codes */ | |
76 | #define NETDEV_TX_OK 0 /* driver took care of packet */ | |
77 | #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/ | |
78 | #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */ | |
79 | ||
80 | /* | |
81 | * Compute the worst case header length according to the protocols | |
82 | * used. | |
83 | */ | |
84 | ||
85 | #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR) | |
86 | #define LL_MAX_HEADER 32 | |
87 | #else | |
88 | #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) | |
89 | #define LL_MAX_HEADER 96 | |
90 | #else | |
91 | #define LL_MAX_HEADER 48 | |
92 | #endif | |
93 | #endif | |
94 | ||
95 | #if !defined(CONFIG_NET_IPIP) && \ | |
96 | !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) | |
97 | #define MAX_HEADER LL_MAX_HEADER | |
98 | #else | |
99 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
100 | #endif | |
101 | ||
102 | /* | |
103 | * Network device statistics. Akin to the 2.0 ether stats but | |
104 | * with byte counters. | |
105 | */ | |
106 | ||
107 | struct net_device_stats | |
108 | { | |
109 | unsigned long rx_packets; /* total packets received */ | |
110 | unsigned long tx_packets; /* total packets transmitted */ | |
111 | unsigned long rx_bytes; /* total bytes received */ | |
112 | unsigned long tx_bytes; /* total bytes transmitted */ | |
113 | unsigned long rx_errors; /* bad packets received */ | |
114 | unsigned long tx_errors; /* packet transmit problems */ | |
115 | unsigned long rx_dropped; /* no space in linux buffers */ | |
116 | unsigned long tx_dropped; /* no space available in linux */ | |
117 | unsigned long multicast; /* multicast packets received */ | |
118 | unsigned long collisions; | |
119 | ||
120 | /* detailed rx_errors: */ | |
121 | unsigned long rx_length_errors; | |
122 | unsigned long rx_over_errors; /* receiver ring buff overflow */ | |
123 | unsigned long rx_crc_errors; /* recved pkt with crc error */ | |
124 | unsigned long rx_frame_errors; /* recv'd frame alignment error */ | |
125 | unsigned long rx_fifo_errors; /* recv'r fifo overrun */ | |
126 | unsigned long rx_missed_errors; /* receiver missed packet */ | |
127 | ||
128 | /* detailed tx_errors */ | |
129 | unsigned long tx_aborted_errors; | |
130 | unsigned long tx_carrier_errors; | |
131 | unsigned long tx_fifo_errors; | |
132 | unsigned long tx_heartbeat_errors; | |
133 | unsigned long tx_window_errors; | |
134 | ||
135 | /* for cslip etc */ | |
136 | unsigned long rx_compressed; | |
137 | unsigned long tx_compressed; | |
138 | }; | |
139 | ||
140 | ||
141 | /* Media selection options. */ | |
142 | enum { | |
143 | IF_PORT_UNKNOWN = 0, | |
144 | IF_PORT_10BASE2, | |
145 | IF_PORT_10BASET, | |
146 | IF_PORT_AUI, | |
147 | IF_PORT_100BASET, | |
148 | IF_PORT_100BASETX, | |
149 | IF_PORT_100BASEFX | |
150 | }; | |
151 | ||
152 | #ifdef __KERNEL__ | |
153 | ||
154 | #include <linux/cache.h> | |
155 | #include <linux/skbuff.h> | |
156 | ||
157 | struct neighbour; | |
158 | struct neigh_parms; | |
159 | struct sk_buff; | |
160 | ||
161 | struct netif_rx_stats | |
162 | { | |
163 | unsigned total; | |
164 | unsigned dropped; | |
165 | unsigned time_squeeze; | |
1da177e4 LT |
166 | unsigned cpu_collision; |
167 | }; | |
168 | ||
169 | DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); | |
170 | ||
171 | ||
172 | /* | |
173 | * We tag multicasts with these structures. | |
174 | */ | |
175 | ||
176 | struct dev_mc_list | |
177 | { | |
178 | struct dev_mc_list *next; | |
179 | __u8 dmi_addr[MAX_ADDR_LEN]; | |
180 | unsigned char dmi_addrlen; | |
181 | int dmi_users; | |
182 | int dmi_gusers; | |
183 | }; | |
184 | ||
185 | struct hh_cache | |
186 | { | |
187 | struct hh_cache *hh_next; /* Next entry */ | |
188 | atomic_t hh_refcnt; /* number of users */ | |
189 | unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP | |
190 | * NOTE: For VLANs, this will be the | |
191 | * encapuslated type. --BLG | |
192 | */ | |
193 | int hh_len; /* length of header */ | |
194 | int (*hh_output)(struct sk_buff *skb); | |
195 | rwlock_t hh_lock; | |
196 | ||
197 | /* cached hardware header; allow for machine alignment needs. */ | |
198 | #define HH_DATA_MOD 16 | |
199 | #define HH_DATA_OFF(__len) \ | |
5ba0eac6 | 200 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
1da177e4 LT |
201 | #define HH_DATA_ALIGN(__len) \ |
202 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
203 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
204 | }; | |
205 | ||
206 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
207 | * Alternative is: | |
208 | * dev->hard_header_len ? (dev->hard_header_len + | |
209 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
210 | * | |
211 | * We could use other alignment values, but we must maintain the | |
212 | * relationship HH alignment <= LL alignment. | |
213 | */ | |
214 | #define LL_RESERVED_SPACE(dev) \ | |
215 | (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
216 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ | |
217 | ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
218 | ||
219 | /* These flag bits are private to the generic network queueing | |
220 | * layer, they may not be explicitly referenced by any other | |
221 | * code. | |
222 | */ | |
223 | ||
224 | enum netdev_state_t | |
225 | { | |
226 | __LINK_STATE_XOFF=0, | |
227 | __LINK_STATE_START, | |
228 | __LINK_STATE_PRESENT, | |
229 | __LINK_STATE_SCHED, | |
230 | __LINK_STATE_NOCARRIER, | |
231 | __LINK_STATE_RX_SCHED, | |
b00055aa SR |
232 | __LINK_STATE_LINKWATCH_PENDING, |
233 | __LINK_STATE_DORMANT, | |
1da177e4 LT |
234 | }; |
235 | ||
236 | ||
237 | /* | |
238 | * This structure holds at boot time configured netdevice settings. They | |
239 | * are then used in the device probing. | |
240 | */ | |
241 | struct netdev_boot_setup { | |
242 | char name[IFNAMSIZ]; | |
243 | struct ifmap map; | |
244 | }; | |
245 | #define NETDEV_BOOT_SETUP_MAX 8 | |
246 | ||
20380731 | 247 | extern int __init netdev_boot_setup(char *str); |
1da177e4 LT |
248 | |
249 | /* | |
250 | * The DEVICE structure. | |
251 | * Actually, this whole structure is a big mistake. It mixes I/O | |
252 | * data with strictly "high-level" data, and it has to know about | |
253 | * almost every data structure used in the INET module. | |
254 | * | |
255 | * FIXME: cleanup struct net_device such that network protocol info | |
256 | * moves out. | |
257 | */ | |
258 | ||
259 | struct net_device | |
260 | { | |
261 | ||
262 | /* | |
263 | * This is the first field of the "visible" part of this structure | |
264 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
265 | * the interface. | |
266 | */ | |
267 | char name[IFNAMSIZ]; | |
9356b8fc ED |
268 | /* device name hash chain */ |
269 | struct hlist_node name_hlist; | |
1da177e4 LT |
270 | |
271 | /* | |
272 | * I/O specific fields | |
273 | * FIXME: Merge these and struct ifmap into one | |
274 | */ | |
275 | unsigned long mem_end; /* shared mem end */ | |
276 | unsigned long mem_start; /* shared mem start */ | |
277 | unsigned long base_addr; /* device I/O address */ | |
278 | unsigned int irq; /* device IRQ number */ | |
279 | ||
280 | /* | |
281 | * Some hardware also needs these fields, but they are not | |
282 | * part of the usual set specified in Space.c. | |
283 | */ | |
284 | ||
285 | unsigned char if_port; /* Selectable AUI, TP,..*/ | |
286 | unsigned char dma; /* DMA channel */ | |
287 | ||
288 | unsigned long state; | |
289 | ||
290 | struct net_device *next; | |
291 | ||
292 | /* The device initialization function. Called only once. */ | |
293 | int (*init)(struct net_device *dev); | |
294 | ||
295 | /* ------- Fields preinitialized in Space.c finish here ------- */ | |
296 | ||
9356b8fc ED |
297 | /* Net device features */ |
298 | unsigned long features; | |
299 | #define NETIF_F_SG 1 /* Scatter/gather IO. */ | |
300 | #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */ | |
301 | #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ | |
302 | #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ | |
303 | #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ | |
304 | #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ | |
305 | #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ | |
306 | #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ | |
307 | #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ | |
308 | #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ | |
309 | #define NETIF_F_TSO 2048 /* Can offload TCP/IP segmentation */ | |
310 | #define NETIF_F_LLTX 4096 /* LockLess TX */ | |
e89e9cf5 | 311 | #define NETIF_F_UFO 8192 /* Can offload UDP Large Send*/ |
9356b8fc | 312 | |
1da177e4 LT |
313 | struct net_device *next_sched; |
314 | ||
315 | /* Interface index. Unique device identifier */ | |
316 | int ifindex; | |
317 | int iflink; | |
318 | ||
319 | ||
320 | struct net_device_stats* (*get_stats)(struct net_device *dev); | |
321 | struct iw_statistics* (*get_wireless_stats)(struct net_device *dev); | |
322 | ||
323 | /* List of functions to handle Wireless Extensions (instead of ioctl). | |
324 | * See <net/iw_handler.h> for details. Jean II */ | |
325 | const struct iw_handler_def * wireless_handlers; | |
326 | /* Instance data managed by the core of Wireless Extensions. */ | |
327 | struct iw_public_data * wireless_data; | |
328 | ||
329 | struct ethtool_ops *ethtool_ops; | |
330 | ||
331 | /* | |
332 | * This marks the end of the "visible" part of the structure. All | |
333 | * fields hereafter are internal to the system, and may change at | |
334 | * will (read: may be cleaned up at will). | |
335 | */ | |
336 | ||
1da177e4 | 337 | |
b00055aa | 338 | unsigned int flags; /* interface flags (a la BSD) */ |
1da177e4 LT |
339 | unsigned short gflags; |
340 | unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ | |
341 | unsigned short padded; /* How much padding added by alloc_netdev() */ | |
342 | ||
b00055aa SR |
343 | unsigned char operstate; /* RFC2863 operstate */ |
344 | unsigned char link_mode; /* mapping policy to operstate */ | |
345 | ||
1da177e4 LT |
346 | unsigned mtu; /* interface MTU value */ |
347 | unsigned short type; /* interface hardware type */ | |
348 | unsigned short hard_header_len; /* hardware hdr length */ | |
1da177e4 LT |
349 | |
350 | struct net_device *master; /* Pointer to master device of a group, | |
351 | * which this device is member of. | |
352 | */ | |
353 | ||
354 | /* Interface address info. */ | |
a6f9a705 | 355 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
1da177e4 LT |
356 | unsigned char addr_len; /* hardware address length */ |
357 | unsigned short dev_id; /* for shared network cards */ | |
358 | ||
359 | struct dev_mc_list *mc_list; /* Multicast mac addresses */ | |
360 | int mc_count; /* Number of installed mcasts */ | |
361 | int promiscuity; | |
362 | int allmulti; | |
363 | ||
1da177e4 LT |
364 | |
365 | /* Protocol specific pointers */ | |
366 | ||
367 | void *atalk_ptr; /* AppleTalk link */ | |
368 | void *ip_ptr; /* IPv4 specific data */ | |
369 | void *dn_ptr; /* DECnet specific data */ | |
370 | void *ip6_ptr; /* IPv6 specific data */ | |
371 | void *ec_ptr; /* Econet specific data */ | |
372 | void *ax25_ptr; /* AX.25 specific data */ | |
373 | ||
9356b8fc ED |
374 | /* |
375 | * Cache line mostly used on receive path (including eth_type_trans()) | |
376 | */ | |
377 | struct list_head poll_list ____cacheline_aligned_in_smp; | |
378 | /* Link to poll list */ | |
379 | ||
380 | int (*poll) (struct net_device *dev, int *quota); | |
1da177e4 LT |
381 | int quota; |
382 | int weight; | |
9356b8fc ED |
383 | unsigned long last_rx; /* Time of last Rx */ |
384 | /* Interface address info used in eth_type_trans() */ | |
385 | unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast | |
386 | because most packets are unicast) */ | |
387 | ||
388 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ | |
1da177e4 | 389 | |
9356b8fc ED |
390 | /* |
391 | * Cache line mostly used on queue transmit path (qdisc) | |
392 | */ | |
393 | /* device queue lock */ | |
394 | spinlock_t queue_lock ____cacheline_aligned_in_smp; | |
1da177e4 LT |
395 | struct Qdisc *qdisc; |
396 | struct Qdisc *qdisc_sleeping; | |
1da177e4 LT |
397 | struct list_head qdisc_list; |
398 | unsigned long tx_queue_len; /* Max frames per queue allowed */ | |
399 | ||
400 | /* ingress path synchronizer */ | |
401 | spinlock_t ingress_lock; | |
9356b8fc ED |
402 | struct Qdisc *qdisc_ingress; |
403 | ||
404 | /* | |
405 | * One part is mostly used on xmit path (device) | |
406 | */ | |
1da177e4 | 407 | /* hard_start_xmit synchronizer */ |
9356b8fc | 408 | spinlock_t xmit_lock ____cacheline_aligned_in_smp; |
1da177e4 LT |
409 | /* cpu id of processor entered to hard_start_xmit or -1, |
410 | if nobody entered there. | |
411 | */ | |
412 | int xmit_lock_owner; | |
9356b8fc ED |
413 | void *priv; /* pointer to private data */ |
414 | int (*hard_start_xmit) (struct sk_buff *skb, | |
415 | struct net_device *dev); | |
416 | /* These may be needed for future network-power-down code. */ | |
417 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ | |
418 | ||
419 | int watchdog_timeo; /* used by dev_watchdog() */ | |
420 | struct timer_list watchdog_timer; | |
421 | ||
422 | /* | |
423 | * refcnt is a very hot point, so align it on SMP | |
424 | */ | |
1da177e4 | 425 | /* Number of references to this device */ |
9356b8fc ED |
426 | atomic_t refcnt ____cacheline_aligned_in_smp; |
427 | ||
1da177e4 LT |
428 | /* delayed register/unregister */ |
429 | struct list_head todo_list; | |
1da177e4 LT |
430 | /* device index hash chain */ |
431 | struct hlist_node index_hlist; | |
432 | ||
433 | /* register/unregister state machine */ | |
434 | enum { NETREG_UNINITIALIZED=0, | |
435 | NETREG_REGISTERING, /* called register_netdevice */ | |
436 | NETREG_REGISTERED, /* completed register todo */ | |
437 | NETREG_UNREGISTERING, /* called unregister_netdevice */ | |
438 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
439 | NETREG_RELEASED, /* called free_netdev */ | |
440 | } reg_state; | |
441 | ||
1da177e4 LT |
442 | /* Called after device is detached from network. */ |
443 | void (*uninit)(struct net_device *dev); | |
444 | /* Called after last user reference disappears. */ | |
445 | void (*destructor)(struct net_device *dev); | |
446 | ||
447 | /* Pointers to interface service routines. */ | |
448 | int (*open)(struct net_device *dev); | |
449 | int (*stop)(struct net_device *dev); | |
1da177e4 | 450 | #define HAVE_NETDEV_POLL |
1da177e4 LT |
451 | int (*hard_header) (struct sk_buff *skb, |
452 | struct net_device *dev, | |
453 | unsigned short type, | |
454 | void *daddr, | |
455 | void *saddr, | |
456 | unsigned len); | |
457 | int (*rebuild_header)(struct sk_buff *skb); | |
458 | #define HAVE_MULTICAST | |
459 | void (*set_multicast_list)(struct net_device *dev); | |
460 | #define HAVE_SET_MAC_ADDR | |
461 | int (*set_mac_address)(struct net_device *dev, | |
462 | void *addr); | |
463 | #define HAVE_PRIVATE_IOCTL | |
464 | int (*do_ioctl)(struct net_device *dev, | |
465 | struct ifreq *ifr, int cmd); | |
466 | #define HAVE_SET_CONFIG | |
467 | int (*set_config)(struct net_device *dev, | |
468 | struct ifmap *map); | |
469 | #define HAVE_HEADER_CACHE | |
470 | int (*hard_header_cache)(struct neighbour *neigh, | |
471 | struct hh_cache *hh); | |
472 | void (*header_cache_update)(struct hh_cache *hh, | |
473 | struct net_device *dev, | |
474 | unsigned char * haddr); | |
475 | #define HAVE_CHANGE_MTU | |
476 | int (*change_mtu)(struct net_device *dev, int new_mtu); | |
477 | ||
478 | #define HAVE_TX_TIMEOUT | |
479 | void (*tx_timeout) (struct net_device *dev); | |
480 | ||
481 | void (*vlan_rx_register)(struct net_device *dev, | |
482 | struct vlan_group *grp); | |
483 | void (*vlan_rx_add_vid)(struct net_device *dev, | |
484 | unsigned short vid); | |
485 | void (*vlan_rx_kill_vid)(struct net_device *dev, | |
486 | unsigned short vid); | |
487 | ||
488 | int (*hard_header_parse)(struct sk_buff *skb, | |
489 | unsigned char *haddr); | |
490 | int (*neigh_setup)(struct net_device *dev, struct neigh_parms *); | |
491 | #ifdef CONFIG_NETPOLL | |
115c1d6e | 492 | struct netpoll_info *npinfo; |
1da177e4 LT |
493 | #endif |
494 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
495 | void (*poll_controller)(struct net_device *dev); | |
496 | #endif | |
497 | ||
498 | /* bridge stuff */ | |
499 | struct net_bridge_port *br_port; | |
500 | ||
501 | #ifdef CONFIG_NET_DIVERT | |
502 | /* this will get initialized at each interface type init routine */ | |
503 | struct divert_blk *divert; | |
504 | #endif /* CONFIG_NET_DIVERT */ | |
505 | ||
506 | /* class/net/name entry */ | |
507 | struct class_device class_dev; | |
508 | }; | |
509 | ||
510 | #define NETDEV_ALIGN 32 | |
511 | #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) | |
512 | ||
513 | static inline void *netdev_priv(struct net_device *dev) | |
514 | { | |
515 | return (char *)dev + ((sizeof(struct net_device) | |
516 | + NETDEV_ALIGN_CONST) | |
517 | & ~NETDEV_ALIGN_CONST); | |
518 | } | |
519 | ||
520 | #define SET_MODULE_OWNER(dev) do { } while (0) | |
521 | /* Set the sysfs physical device reference for the network logical device | |
522 | * if set prior to registration will cause a symlink during initialization. | |
523 | */ | |
524 | #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev)) | |
525 | ||
526 | struct packet_type { | |
f2ccd8fa DM |
527 | __be16 type; /* This is really htons(ether_type). */ |
528 | struct net_device *dev; /* NULL is wildcarded here */ | |
529 | int (*func) (struct sk_buff *, | |
530 | struct net_device *, | |
531 | struct packet_type *, | |
532 | struct net_device *); | |
1da177e4 LT |
533 | void *af_packet_priv; |
534 | struct list_head list; | |
535 | }; | |
536 | ||
537 | #include <linux/interrupt.h> | |
538 | #include <linux/notifier.h> | |
539 | ||
540 | extern struct net_device loopback_dev; /* The loopback */ | |
541 | extern struct net_device *dev_base; /* All devices */ | |
542 | extern rwlock_t dev_base_lock; /* Device list lock */ | |
543 | ||
544 | extern int netdev_boot_setup_check(struct net_device *dev); | |
545 | extern unsigned long netdev_boot_base(const char *prefix, int unit); | |
546 | extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr); | |
547 | extern struct net_device *dev_getfirstbyhwtype(unsigned short type); | |
548 | extern void dev_add_pack(struct packet_type *pt); | |
549 | extern void dev_remove_pack(struct packet_type *pt); | |
550 | extern void __dev_remove_pack(struct packet_type *pt); | |
551 | ||
552 | extern struct net_device *dev_get_by_flags(unsigned short flags, | |
553 | unsigned short mask); | |
554 | extern struct net_device *dev_get_by_name(const char *name); | |
555 | extern struct net_device *__dev_get_by_name(const char *name); | |
556 | extern int dev_alloc_name(struct net_device *dev, const char *name); | |
557 | extern int dev_open(struct net_device *dev); | |
558 | extern int dev_close(struct net_device *dev); | |
559 | extern int dev_queue_xmit(struct sk_buff *skb); | |
560 | extern int register_netdevice(struct net_device *dev); | |
561 | extern int unregister_netdevice(struct net_device *dev); | |
562 | extern void free_netdev(struct net_device *dev); | |
563 | extern void synchronize_net(void); | |
564 | extern int register_netdevice_notifier(struct notifier_block *nb); | |
565 | extern int unregister_netdevice_notifier(struct notifier_block *nb); | |
566 | extern int call_netdevice_notifiers(unsigned long val, void *v); | |
567 | extern struct net_device *dev_get_by_index(int ifindex); | |
568 | extern struct net_device *__dev_get_by_index(int ifindex); | |
569 | extern int dev_restart(struct net_device *dev); | |
570 | #ifdef CONFIG_NETPOLL_TRAP | |
571 | extern int netpoll_trap(void); | |
572 | #endif | |
573 | ||
574 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); | |
575 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); | |
576 | static inline int unregister_gifconf(unsigned int family) | |
577 | { | |
578 | return register_gifconf(family, NULL); | |
579 | } | |
580 | ||
581 | /* | |
582 | * Incoming packets are placed on per-cpu queues so that | |
583 | * no locking is needed. | |
584 | */ | |
585 | ||
586 | struct softnet_data | |
587 | { | |
31aa02c5 | 588 | struct net_device *output_queue; |
1da177e4 LT |
589 | struct sk_buff_head input_pkt_queue; |
590 | struct list_head poll_list; | |
1da177e4 LT |
591 | struct sk_buff *completion_queue; |
592 | ||
593 | struct net_device backlog_dev; /* Sorry. 8) */ | |
594 | }; | |
595 | ||
596 | DECLARE_PER_CPU(struct softnet_data,softnet_data); | |
597 | ||
598 | #define HAVE_NETIF_QUEUE | |
599 | ||
56079431 | 600 | extern void __netif_schedule(struct net_device *dev); |
1da177e4 LT |
601 | |
602 | static inline void netif_schedule(struct net_device *dev) | |
603 | { | |
604 | if (!test_bit(__LINK_STATE_XOFF, &dev->state)) | |
605 | __netif_schedule(dev); | |
606 | } | |
607 | ||
608 | static inline void netif_start_queue(struct net_device *dev) | |
609 | { | |
610 | clear_bit(__LINK_STATE_XOFF, &dev->state); | |
611 | } | |
612 | ||
613 | static inline void netif_wake_queue(struct net_device *dev) | |
614 | { | |
615 | #ifdef CONFIG_NETPOLL_TRAP | |
616 | if (netpoll_trap()) | |
617 | return; | |
618 | #endif | |
619 | if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state)) | |
620 | __netif_schedule(dev); | |
621 | } | |
622 | ||
623 | static inline void netif_stop_queue(struct net_device *dev) | |
624 | { | |
625 | #ifdef CONFIG_NETPOLL_TRAP | |
626 | if (netpoll_trap()) | |
627 | return; | |
628 | #endif | |
629 | set_bit(__LINK_STATE_XOFF, &dev->state); | |
630 | } | |
631 | ||
632 | static inline int netif_queue_stopped(const struct net_device *dev) | |
633 | { | |
634 | return test_bit(__LINK_STATE_XOFF, &dev->state); | |
635 | } | |
636 | ||
637 | static inline int netif_running(const struct net_device *dev) | |
638 | { | |
639 | return test_bit(__LINK_STATE_START, &dev->state); | |
640 | } | |
641 | ||
642 | ||
643 | /* Use this variant when it is known for sure that it | |
644 | * is executing from interrupt context. | |
645 | */ | |
646 | static inline void dev_kfree_skb_irq(struct sk_buff *skb) | |
647 | { | |
648 | if (atomic_dec_and_test(&skb->users)) { | |
649 | struct softnet_data *sd; | |
650 | unsigned long flags; | |
651 | ||
652 | local_irq_save(flags); | |
653 | sd = &__get_cpu_var(softnet_data); | |
654 | skb->next = sd->completion_queue; | |
655 | sd->completion_queue = skb; | |
656 | raise_softirq_irqoff(NET_TX_SOFTIRQ); | |
657 | local_irq_restore(flags); | |
658 | } | |
659 | } | |
660 | ||
661 | /* Use this variant in places where it could be invoked | |
662 | * either from interrupt or non-interrupt context. | |
663 | */ | |
56079431 | 664 | extern void dev_kfree_skb_any(struct sk_buff *skb); |
1da177e4 LT |
665 | |
666 | #define HAVE_NETIF_RX 1 | |
667 | extern int netif_rx(struct sk_buff *skb); | |
668 | extern int netif_rx_ni(struct sk_buff *skb); | |
669 | #define HAVE_NETIF_RECEIVE_SKB 1 | |
670 | extern int netif_receive_skb(struct sk_buff *skb); | |
c2373ee9 | 671 | extern int dev_valid_name(const char *name); |
1da177e4 LT |
672 | extern int dev_ioctl(unsigned int cmd, void __user *); |
673 | extern int dev_ethtool(struct ifreq *); | |
674 | extern unsigned dev_get_flags(const struct net_device *); | |
675 | extern int dev_change_flags(struct net_device *, unsigned); | |
676 | extern int dev_change_name(struct net_device *, char *); | |
677 | extern int dev_set_mtu(struct net_device *, int); | |
678 | extern int dev_set_mac_address(struct net_device *, | |
679 | struct sockaddr *); | |
680 | extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev); | |
681 | ||
682 | extern void dev_init(void); | |
683 | ||
684 | extern int netdev_nit; | |
20380731 | 685 | extern int netdev_budget; |
1da177e4 LT |
686 | |
687 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
688 | extern void netdev_run_todo(void); | |
689 | ||
690 | static inline void dev_put(struct net_device *dev) | |
691 | { | |
692 | atomic_dec(&dev->refcnt); | |
693 | } | |
694 | ||
15333061 SH |
695 | static inline void dev_hold(struct net_device *dev) |
696 | { | |
697 | atomic_inc(&dev->refcnt); | |
698 | } | |
1da177e4 LT |
699 | |
700 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
701 | * and _off may be called from IRQ context, but it is caller | |
702 | * who is responsible for serialization of these calls. | |
b00055aa SR |
703 | * |
704 | * The name carrier is inappropriate, these functions should really be | |
705 | * called netif_lowerlayer_*() because they represent the state of any | |
706 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
707 | */ |
708 | ||
709 | extern void linkwatch_fire_event(struct net_device *dev); | |
710 | ||
711 | static inline int netif_carrier_ok(const struct net_device *dev) | |
712 | { | |
713 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
714 | } | |
715 | ||
716 | extern void __netdev_watchdog_up(struct net_device *dev); | |
717 | ||
0a242efc | 718 | extern void netif_carrier_on(struct net_device *dev); |
1da177e4 | 719 | |
0a242efc | 720 | extern void netif_carrier_off(struct net_device *dev); |
1da177e4 | 721 | |
b00055aa SR |
722 | static inline void netif_dormant_on(struct net_device *dev) |
723 | { | |
724 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
725 | linkwatch_fire_event(dev); | |
726 | } | |
727 | ||
728 | static inline void netif_dormant_off(struct net_device *dev) | |
729 | { | |
730 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
731 | linkwatch_fire_event(dev); | |
732 | } | |
733 | ||
734 | static inline int netif_dormant(const struct net_device *dev) | |
735 | { | |
736 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
737 | } | |
738 | ||
739 | ||
740 | static inline int netif_oper_up(const struct net_device *dev) { | |
741 | return (dev->operstate == IF_OPER_UP || | |
742 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
743 | } | |
744 | ||
1da177e4 LT |
745 | /* Hot-plugging. */ |
746 | static inline int netif_device_present(struct net_device *dev) | |
747 | { | |
748 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
749 | } | |
750 | ||
56079431 | 751 | extern void netif_device_detach(struct net_device *dev); |
1da177e4 | 752 | |
56079431 | 753 | extern void netif_device_attach(struct net_device *dev); |
1da177e4 LT |
754 | |
755 | /* | |
756 | * Network interface message level settings | |
757 | */ | |
758 | #define HAVE_NETIF_MSG 1 | |
759 | ||
760 | enum { | |
761 | NETIF_MSG_DRV = 0x0001, | |
762 | NETIF_MSG_PROBE = 0x0002, | |
763 | NETIF_MSG_LINK = 0x0004, | |
764 | NETIF_MSG_TIMER = 0x0008, | |
765 | NETIF_MSG_IFDOWN = 0x0010, | |
766 | NETIF_MSG_IFUP = 0x0020, | |
767 | NETIF_MSG_RX_ERR = 0x0040, | |
768 | NETIF_MSG_TX_ERR = 0x0080, | |
769 | NETIF_MSG_TX_QUEUED = 0x0100, | |
770 | NETIF_MSG_INTR = 0x0200, | |
771 | NETIF_MSG_TX_DONE = 0x0400, | |
772 | NETIF_MSG_RX_STATUS = 0x0800, | |
773 | NETIF_MSG_PKTDATA = 0x1000, | |
774 | NETIF_MSG_HW = 0x2000, | |
775 | NETIF_MSG_WOL = 0x4000, | |
776 | }; | |
777 | ||
778 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
779 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
780 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
781 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
782 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
783 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
784 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
785 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
786 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
787 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
788 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
789 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
790 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
791 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
792 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
793 | ||
794 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
795 | { | |
796 | /* use default */ | |
797 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
798 | return default_msg_enable_bits; | |
799 | if (debug_value == 0) /* no output */ | |
800 | return 0; | |
801 | /* set low N bits */ | |
802 | return (1 << debug_value) - 1; | |
803 | } | |
804 | ||
0a122576 | 805 | /* Test if receive needs to be scheduled */ |
806 | static inline int __netif_rx_schedule_prep(struct net_device *dev) | |
793b883e SH |
807 | { |
808 | return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state); | |
809 | } | |
1da177e4 | 810 | |
0a122576 | 811 | /* Test if receive needs to be scheduled but only if up */ |
1da177e4 LT |
812 | static inline int netif_rx_schedule_prep(struct net_device *dev) |
813 | { | |
0a122576 | 814 | return netif_running(dev) && __netif_rx_schedule_prep(dev); |
1da177e4 LT |
815 | } |
816 | ||
817 | /* Add interface to tail of rx poll list. This assumes that _prep has | |
818 | * already been called and returned 1. | |
819 | */ | |
820 | ||
56079431 | 821 | extern void __netif_rx_schedule(struct net_device *dev); |
1da177e4 LT |
822 | |
823 | /* Try to reschedule poll. Called by irq handler. */ | |
824 | ||
825 | static inline void netif_rx_schedule(struct net_device *dev) | |
826 | { | |
827 | if (netif_rx_schedule_prep(dev)) | |
828 | __netif_rx_schedule(dev); | |
829 | } | |
830 | ||
734cbc36 SH |
831 | |
832 | static inline void __netif_rx_reschedule(struct net_device *dev, int undo) | |
833 | { | |
834 | dev->quota += undo; | |
835 | list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list); | |
836 | __raise_softirq_irqoff(NET_RX_SOFTIRQ); | |
837 | } | |
838 | ||
839 | /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */ | |
1da177e4 LT |
840 | static inline int netif_rx_reschedule(struct net_device *dev, int undo) |
841 | { | |
842 | if (netif_rx_schedule_prep(dev)) { | |
843 | unsigned long flags; | |
1da177e4 | 844 | local_irq_save(flags); |
734cbc36 | 845 | __netif_rx_reschedule(dev, undo); |
1da177e4 LT |
846 | local_irq_restore(flags); |
847 | return 1; | |
848 | } | |
849 | return 0; | |
850 | } | |
851 | ||
852 | /* Remove interface from poll list: it must be in the poll list | |
853 | * on current cpu. This primitive is called by dev->poll(), when | |
854 | * it completes the work. The device cannot be out of poll list at this | |
855 | * moment, it is BUG(). | |
856 | */ | |
857 | static inline void netif_rx_complete(struct net_device *dev) | |
858 | { | |
859 | unsigned long flags; | |
860 | ||
861 | local_irq_save(flags); | |
862 | BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state)); | |
863 | list_del(&dev->poll_list); | |
864 | smp_mb__before_clear_bit(); | |
865 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); | |
866 | local_irq_restore(flags); | |
867 | } | |
868 | ||
869 | static inline void netif_poll_disable(struct net_device *dev) | |
870 | { | |
3173c890 | 871 | while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state)) |
1da177e4 | 872 | /* No hurry. */ |
3173c890 | 873 | schedule_timeout_interruptible(1); |
1da177e4 LT |
874 | } |
875 | ||
876 | static inline void netif_poll_enable(struct net_device *dev) | |
877 | { | |
878 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); | |
879 | } | |
880 | ||
881 | /* same as netif_rx_complete, except that local_irq_save(flags) | |
882 | * has already been issued | |
883 | */ | |
884 | static inline void __netif_rx_complete(struct net_device *dev) | |
885 | { | |
886 | BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state)); | |
887 | list_del(&dev->poll_list); | |
888 | smp_mb__before_clear_bit(); | |
889 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); | |
890 | } | |
891 | ||
892 | static inline void netif_tx_disable(struct net_device *dev) | |
893 | { | |
894 | spin_lock_bh(&dev->xmit_lock); | |
895 | netif_stop_queue(dev); | |
896 | spin_unlock_bh(&dev->xmit_lock); | |
897 | } | |
898 | ||
899 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ | |
900 | ||
901 | extern void ether_setup(struct net_device *dev); | |
902 | ||
903 | /* Support for loadable net-drivers */ | |
904 | extern struct net_device *alloc_netdev(int sizeof_priv, const char *name, | |
905 | void (*setup)(struct net_device *)); | |
906 | extern int register_netdev(struct net_device *dev); | |
907 | extern void unregister_netdev(struct net_device *dev); | |
908 | /* Functions used for multicast support */ | |
909 | extern void dev_mc_upload(struct net_device *dev); | |
910 | extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); | |
911 | extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); | |
912 | extern void dev_mc_discard(struct net_device *dev); | |
913 | extern void dev_set_promiscuity(struct net_device *dev, int inc); | |
914 | extern void dev_set_allmulti(struct net_device *dev, int inc); | |
915 | extern void netdev_state_change(struct net_device *dev); | |
d8a33ac4 | 916 | extern void netdev_features_change(struct net_device *dev); |
1da177e4 LT |
917 | /* Load a device via the kmod */ |
918 | extern void dev_load(const char *name); | |
919 | extern void dev_mcast_init(void); | |
920 | extern int netdev_max_backlog; | |
921 | extern int weight_p; | |
922 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); | |
923 | extern int skb_checksum_help(struct sk_buff *skb, int inward); | |
fb286bb2 HX |
924 | #ifdef CONFIG_BUG |
925 | extern void netdev_rx_csum_fault(struct net_device *dev); | |
926 | #else | |
927 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
928 | { | |
929 | } | |
930 | #endif | |
1da177e4 LT |
931 | /* rx skb timestamps */ |
932 | extern void net_enable_timestamp(void); | |
933 | extern void net_disable_timestamp(void); | |
934 | ||
20380731 ACM |
935 | #ifdef CONFIG_PROC_FS |
936 | extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); | |
937 | extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); | |
938 | extern void dev_seq_stop(struct seq_file *seq, void *v); | |
939 | #endif | |
940 | ||
941 | extern void linkwatch_run_queue(void); | |
942 | ||
1da177e4 LT |
943 | #endif /* __KERNEL__ */ |
944 | ||
945 | #endif /* _LINUX_DEV_H */ |