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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 | ||
37 | #include <linux/config.h> | |
38 | #include <linux/device.h> | |
39 | #include <linux/percpu.h> | |
40 | ||
41 | struct divert_blk; | |
42 | struct vlan_group; | |
43 | struct ethtool_ops; | |
44 | struct netpoll; | |
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; | |
167 | unsigned throttled; | |
168 | unsigned fastroute_hit; | |
169 | unsigned fastroute_success; | |
170 | unsigned fastroute_defer; | |
171 | unsigned fastroute_deferred_out; | |
172 | unsigned fastroute_latency_reduction; | |
173 | unsigned cpu_collision; | |
174 | }; | |
175 | ||
176 | DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); | |
177 | ||
178 | ||
179 | /* | |
180 | * We tag multicasts with these structures. | |
181 | */ | |
182 | ||
183 | struct dev_mc_list | |
184 | { | |
185 | struct dev_mc_list *next; | |
186 | __u8 dmi_addr[MAX_ADDR_LEN]; | |
187 | unsigned char dmi_addrlen; | |
188 | int dmi_users; | |
189 | int dmi_gusers; | |
190 | }; | |
191 | ||
192 | struct hh_cache | |
193 | { | |
194 | struct hh_cache *hh_next; /* Next entry */ | |
195 | atomic_t hh_refcnt; /* number of users */ | |
196 | unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP | |
197 | * NOTE: For VLANs, this will be the | |
198 | * encapuslated type. --BLG | |
199 | */ | |
200 | int hh_len; /* length of header */ | |
201 | int (*hh_output)(struct sk_buff *skb); | |
202 | rwlock_t hh_lock; | |
203 | ||
204 | /* cached hardware header; allow for machine alignment needs. */ | |
205 | #define HH_DATA_MOD 16 | |
206 | #define HH_DATA_OFF(__len) \ | |
207 | (HH_DATA_MOD - ((__len) & (HH_DATA_MOD - 1))) | |
208 | #define HH_DATA_ALIGN(__len) \ | |
209 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
210 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
211 | }; | |
212 | ||
213 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
214 | * Alternative is: | |
215 | * dev->hard_header_len ? (dev->hard_header_len + | |
216 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
217 | * | |
218 | * We could use other alignment values, but we must maintain the | |
219 | * relationship HH alignment <= LL alignment. | |
220 | */ | |
221 | #define LL_RESERVED_SPACE(dev) \ | |
222 | (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
223 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ | |
224 | ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
225 | ||
226 | /* These flag bits are private to the generic network queueing | |
227 | * layer, they may not be explicitly referenced by any other | |
228 | * code. | |
229 | */ | |
230 | ||
231 | enum netdev_state_t | |
232 | { | |
233 | __LINK_STATE_XOFF=0, | |
234 | __LINK_STATE_START, | |
235 | __LINK_STATE_PRESENT, | |
236 | __LINK_STATE_SCHED, | |
237 | __LINK_STATE_NOCARRIER, | |
238 | __LINK_STATE_RX_SCHED, | |
239 | __LINK_STATE_LINKWATCH_PENDING | |
240 | }; | |
241 | ||
242 | ||
243 | /* | |
244 | * This structure holds at boot time configured netdevice settings. They | |
245 | * are then used in the device probing. | |
246 | */ | |
247 | struct netdev_boot_setup { | |
248 | char name[IFNAMSIZ]; | |
249 | struct ifmap map; | |
250 | }; | |
251 | #define NETDEV_BOOT_SETUP_MAX 8 | |
252 | ||
253 | ||
254 | /* | |
255 | * The DEVICE structure. | |
256 | * Actually, this whole structure is a big mistake. It mixes I/O | |
257 | * data with strictly "high-level" data, and it has to know about | |
258 | * almost every data structure used in the INET module. | |
259 | * | |
260 | * FIXME: cleanup struct net_device such that network protocol info | |
261 | * moves out. | |
262 | */ | |
263 | ||
264 | struct net_device | |
265 | { | |
266 | ||
267 | /* | |
268 | * This is the first field of the "visible" part of this structure | |
269 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
270 | * the interface. | |
271 | */ | |
272 | char name[IFNAMSIZ]; | |
273 | ||
274 | /* | |
275 | * I/O specific fields | |
276 | * FIXME: Merge these and struct ifmap into one | |
277 | */ | |
278 | unsigned long mem_end; /* shared mem end */ | |
279 | unsigned long mem_start; /* shared mem start */ | |
280 | unsigned long base_addr; /* device I/O address */ | |
281 | unsigned int irq; /* device IRQ number */ | |
282 | ||
283 | /* | |
284 | * Some hardware also needs these fields, but they are not | |
285 | * part of the usual set specified in Space.c. | |
286 | */ | |
287 | ||
288 | unsigned char if_port; /* Selectable AUI, TP,..*/ | |
289 | unsigned char dma; /* DMA channel */ | |
290 | ||
291 | unsigned long state; | |
292 | ||
293 | struct net_device *next; | |
294 | ||
295 | /* The device initialization function. Called only once. */ | |
296 | int (*init)(struct net_device *dev); | |
297 | ||
298 | /* ------- Fields preinitialized in Space.c finish here ------- */ | |
299 | ||
300 | struct net_device *next_sched; | |
301 | ||
302 | /* Interface index. Unique device identifier */ | |
303 | int ifindex; | |
304 | int iflink; | |
305 | ||
306 | ||
307 | struct net_device_stats* (*get_stats)(struct net_device *dev); | |
308 | struct iw_statistics* (*get_wireless_stats)(struct net_device *dev); | |
309 | ||
310 | /* List of functions to handle Wireless Extensions (instead of ioctl). | |
311 | * See <net/iw_handler.h> for details. Jean II */ | |
312 | const struct iw_handler_def * wireless_handlers; | |
313 | /* Instance data managed by the core of Wireless Extensions. */ | |
314 | struct iw_public_data * wireless_data; | |
315 | ||
316 | struct ethtool_ops *ethtool_ops; | |
317 | ||
318 | /* | |
319 | * This marks the end of the "visible" part of the structure. All | |
320 | * fields hereafter are internal to the system, and may change at | |
321 | * will (read: may be cleaned up at will). | |
322 | */ | |
323 | ||
324 | /* These may be needed for future network-power-down code. */ | |
325 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ | |
326 | unsigned long last_rx; /* Time of last Rx */ | |
327 | ||
328 | unsigned short flags; /* interface flags (a la BSD) */ | |
329 | unsigned short gflags; | |
330 | unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ | |
331 | unsigned short padded; /* How much padding added by alloc_netdev() */ | |
332 | ||
333 | unsigned mtu; /* interface MTU value */ | |
334 | unsigned short type; /* interface hardware type */ | |
335 | unsigned short hard_header_len; /* hardware hdr length */ | |
336 | void *priv; /* pointer to private data */ | |
337 | ||
338 | struct net_device *master; /* Pointer to master device of a group, | |
339 | * which this device is member of. | |
340 | */ | |
341 | ||
342 | /* Interface address info. */ | |
343 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ | |
344 | unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address */ | |
345 | unsigned char addr_len; /* hardware address length */ | |
346 | unsigned short dev_id; /* for shared network cards */ | |
347 | ||
348 | struct dev_mc_list *mc_list; /* Multicast mac addresses */ | |
349 | int mc_count; /* Number of installed mcasts */ | |
350 | int promiscuity; | |
351 | int allmulti; | |
352 | ||
353 | int watchdog_timeo; | |
354 | struct timer_list watchdog_timer; | |
355 | ||
356 | /* Protocol specific pointers */ | |
357 | ||
358 | void *atalk_ptr; /* AppleTalk link */ | |
359 | void *ip_ptr; /* IPv4 specific data */ | |
360 | void *dn_ptr; /* DECnet specific data */ | |
361 | void *ip6_ptr; /* IPv6 specific data */ | |
362 | void *ec_ptr; /* Econet specific data */ | |
363 | void *ax25_ptr; /* AX.25 specific data */ | |
364 | ||
365 | struct list_head poll_list; /* Link to poll list */ | |
366 | int quota; | |
367 | int weight; | |
368 | ||
369 | struct Qdisc *qdisc; | |
370 | struct Qdisc *qdisc_sleeping; | |
371 | struct Qdisc *qdisc_ingress; | |
372 | struct list_head qdisc_list; | |
373 | unsigned long tx_queue_len; /* Max frames per queue allowed */ | |
374 | ||
375 | /* ingress path synchronizer */ | |
376 | spinlock_t ingress_lock; | |
377 | /* hard_start_xmit synchronizer */ | |
378 | spinlock_t xmit_lock; | |
379 | /* cpu id of processor entered to hard_start_xmit or -1, | |
380 | if nobody entered there. | |
381 | */ | |
382 | int xmit_lock_owner; | |
383 | /* device queue lock */ | |
384 | spinlock_t queue_lock; | |
385 | /* Number of references to this device */ | |
386 | atomic_t refcnt; | |
387 | /* delayed register/unregister */ | |
388 | struct list_head todo_list; | |
389 | /* device name hash chain */ | |
390 | struct hlist_node name_hlist; | |
391 | /* device index hash chain */ | |
392 | struct hlist_node index_hlist; | |
393 | ||
394 | /* register/unregister state machine */ | |
395 | enum { NETREG_UNINITIALIZED=0, | |
396 | NETREG_REGISTERING, /* called register_netdevice */ | |
397 | NETREG_REGISTERED, /* completed register todo */ | |
398 | NETREG_UNREGISTERING, /* called unregister_netdevice */ | |
399 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
400 | NETREG_RELEASED, /* called free_netdev */ | |
401 | } reg_state; | |
402 | ||
403 | /* Net device features */ | |
404 | int features; | |
405 | #define NETIF_F_SG 1 /* Scatter/gather IO. */ | |
406 | #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */ | |
407 | #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ | |
408 | #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ | |
409 | #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ | |
410 | #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ | |
411 | #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ | |
412 | #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ | |
413 | #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ | |
414 | #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ | |
415 | #define NETIF_F_TSO 2048 /* Can offload TCP/IP segmentation */ | |
416 | #define NETIF_F_LLTX 4096 /* LockLess TX */ | |
417 | ||
418 | /* Called after device is detached from network. */ | |
419 | void (*uninit)(struct net_device *dev); | |
420 | /* Called after last user reference disappears. */ | |
421 | void (*destructor)(struct net_device *dev); | |
422 | ||
423 | /* Pointers to interface service routines. */ | |
424 | int (*open)(struct net_device *dev); | |
425 | int (*stop)(struct net_device *dev); | |
426 | int (*hard_start_xmit) (struct sk_buff *skb, | |
427 | struct net_device *dev); | |
428 | #define HAVE_NETDEV_POLL | |
429 | int (*poll) (struct net_device *dev, int *quota); | |
430 | int (*hard_header) (struct sk_buff *skb, | |
431 | struct net_device *dev, | |
432 | unsigned short type, | |
433 | void *daddr, | |
434 | void *saddr, | |
435 | unsigned len); | |
436 | int (*rebuild_header)(struct sk_buff *skb); | |
437 | #define HAVE_MULTICAST | |
438 | void (*set_multicast_list)(struct net_device *dev); | |
439 | #define HAVE_SET_MAC_ADDR | |
440 | int (*set_mac_address)(struct net_device *dev, | |
441 | void *addr); | |
442 | #define HAVE_PRIVATE_IOCTL | |
443 | int (*do_ioctl)(struct net_device *dev, | |
444 | struct ifreq *ifr, int cmd); | |
445 | #define HAVE_SET_CONFIG | |
446 | int (*set_config)(struct net_device *dev, | |
447 | struct ifmap *map); | |
448 | #define HAVE_HEADER_CACHE | |
449 | int (*hard_header_cache)(struct neighbour *neigh, | |
450 | struct hh_cache *hh); | |
451 | void (*header_cache_update)(struct hh_cache *hh, | |
452 | struct net_device *dev, | |
453 | unsigned char * haddr); | |
454 | #define HAVE_CHANGE_MTU | |
455 | int (*change_mtu)(struct net_device *dev, int new_mtu); | |
456 | ||
457 | #define HAVE_TX_TIMEOUT | |
458 | void (*tx_timeout) (struct net_device *dev); | |
459 | ||
460 | void (*vlan_rx_register)(struct net_device *dev, | |
461 | struct vlan_group *grp); | |
462 | void (*vlan_rx_add_vid)(struct net_device *dev, | |
463 | unsigned short vid); | |
464 | void (*vlan_rx_kill_vid)(struct net_device *dev, | |
465 | unsigned short vid); | |
466 | ||
467 | int (*hard_header_parse)(struct sk_buff *skb, | |
468 | unsigned char *haddr); | |
469 | int (*neigh_setup)(struct net_device *dev, struct neigh_parms *); | |
470 | #ifdef CONFIG_NETPOLL | |
471 | struct netpoll *np; | |
472 | #endif | |
473 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
474 | void (*poll_controller)(struct net_device *dev); | |
475 | #endif | |
476 | ||
477 | /* bridge stuff */ | |
478 | struct net_bridge_port *br_port; | |
479 | ||
480 | #ifdef CONFIG_NET_DIVERT | |
481 | /* this will get initialized at each interface type init routine */ | |
482 | struct divert_blk *divert; | |
483 | #endif /* CONFIG_NET_DIVERT */ | |
484 | ||
485 | /* class/net/name entry */ | |
486 | struct class_device class_dev; | |
487 | }; | |
488 | ||
489 | #define NETDEV_ALIGN 32 | |
490 | #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) | |
491 | ||
492 | static inline void *netdev_priv(struct net_device *dev) | |
493 | { | |
494 | return (char *)dev + ((sizeof(struct net_device) | |
495 | + NETDEV_ALIGN_CONST) | |
496 | & ~NETDEV_ALIGN_CONST); | |
497 | } | |
498 | ||
499 | #define SET_MODULE_OWNER(dev) do { } while (0) | |
500 | /* Set the sysfs physical device reference for the network logical device | |
501 | * if set prior to registration will cause a symlink during initialization. | |
502 | */ | |
503 | #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev)) | |
504 | ||
505 | struct packet_type { | |
205902ec | 506 | __be16 type; /* This is really htons(ether_type). */ |
1da177e4 LT |
507 | struct net_device *dev; /* NULL is wildcarded here */ |
508 | int (*func) (struct sk_buff *, struct net_device *, | |
509 | struct packet_type *); | |
510 | void *af_packet_priv; | |
511 | struct list_head list; | |
512 | }; | |
513 | ||
514 | #include <linux/interrupt.h> | |
515 | #include <linux/notifier.h> | |
516 | ||
517 | extern struct net_device loopback_dev; /* The loopback */ | |
518 | extern struct net_device *dev_base; /* All devices */ | |
519 | extern rwlock_t dev_base_lock; /* Device list lock */ | |
520 | ||
521 | extern int netdev_boot_setup_check(struct net_device *dev); | |
522 | extern unsigned long netdev_boot_base(const char *prefix, int unit); | |
523 | extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr); | |
524 | extern struct net_device *dev_getfirstbyhwtype(unsigned short type); | |
525 | extern void dev_add_pack(struct packet_type *pt); | |
526 | extern void dev_remove_pack(struct packet_type *pt); | |
527 | extern void __dev_remove_pack(struct packet_type *pt); | |
528 | ||
529 | extern struct net_device *dev_get_by_flags(unsigned short flags, | |
530 | unsigned short mask); | |
531 | extern struct net_device *dev_get_by_name(const char *name); | |
532 | extern struct net_device *__dev_get_by_name(const char *name); | |
533 | extern int dev_alloc_name(struct net_device *dev, const char *name); | |
534 | extern int dev_open(struct net_device *dev); | |
535 | extern int dev_close(struct net_device *dev); | |
536 | extern int dev_queue_xmit(struct sk_buff *skb); | |
537 | extern int register_netdevice(struct net_device *dev); | |
538 | extern int unregister_netdevice(struct net_device *dev); | |
539 | extern void free_netdev(struct net_device *dev); | |
540 | extern void synchronize_net(void); | |
541 | extern int register_netdevice_notifier(struct notifier_block *nb); | |
542 | extern int unregister_netdevice_notifier(struct notifier_block *nb); | |
543 | extern int call_netdevice_notifiers(unsigned long val, void *v); | |
544 | extern struct net_device *dev_get_by_index(int ifindex); | |
545 | extern struct net_device *__dev_get_by_index(int ifindex); | |
546 | extern int dev_restart(struct net_device *dev); | |
547 | #ifdef CONFIG_NETPOLL_TRAP | |
548 | extern int netpoll_trap(void); | |
549 | #endif | |
550 | ||
551 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); | |
552 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); | |
553 | static inline int unregister_gifconf(unsigned int family) | |
554 | { | |
555 | return register_gifconf(family, NULL); | |
556 | } | |
557 | ||
558 | /* | |
559 | * Incoming packets are placed on per-cpu queues so that | |
560 | * no locking is needed. | |
561 | */ | |
562 | ||
563 | struct softnet_data | |
564 | { | |
565 | int throttle; | |
566 | int cng_level; | |
567 | int avg_blog; | |
568 | struct sk_buff_head input_pkt_queue; | |
569 | struct list_head poll_list; | |
570 | struct net_device *output_queue; | |
571 | struct sk_buff *completion_queue; | |
572 | ||
573 | struct net_device backlog_dev; /* Sorry. 8) */ | |
574 | }; | |
575 | ||
576 | DECLARE_PER_CPU(struct softnet_data,softnet_data); | |
577 | ||
578 | #define HAVE_NETIF_QUEUE | |
579 | ||
580 | static inline void __netif_schedule(struct net_device *dev) | |
581 | { | |
582 | if (!test_and_set_bit(__LINK_STATE_SCHED, &dev->state)) { | |
583 | unsigned long flags; | |
584 | struct softnet_data *sd; | |
585 | ||
586 | local_irq_save(flags); | |
587 | sd = &__get_cpu_var(softnet_data); | |
588 | dev->next_sched = sd->output_queue; | |
589 | sd->output_queue = dev; | |
590 | raise_softirq_irqoff(NET_TX_SOFTIRQ); | |
591 | local_irq_restore(flags); | |
592 | } | |
593 | } | |
594 | ||
595 | static inline void netif_schedule(struct net_device *dev) | |
596 | { | |
597 | if (!test_bit(__LINK_STATE_XOFF, &dev->state)) | |
598 | __netif_schedule(dev); | |
599 | } | |
600 | ||
601 | static inline void netif_start_queue(struct net_device *dev) | |
602 | { | |
603 | clear_bit(__LINK_STATE_XOFF, &dev->state); | |
604 | } | |
605 | ||
606 | static inline void netif_wake_queue(struct net_device *dev) | |
607 | { | |
608 | #ifdef CONFIG_NETPOLL_TRAP | |
609 | if (netpoll_trap()) | |
610 | return; | |
611 | #endif | |
612 | if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state)) | |
613 | __netif_schedule(dev); | |
614 | } | |
615 | ||
616 | static inline void netif_stop_queue(struct net_device *dev) | |
617 | { | |
618 | #ifdef CONFIG_NETPOLL_TRAP | |
619 | if (netpoll_trap()) | |
620 | return; | |
621 | #endif | |
622 | set_bit(__LINK_STATE_XOFF, &dev->state); | |
623 | } | |
624 | ||
625 | static inline int netif_queue_stopped(const struct net_device *dev) | |
626 | { | |
627 | return test_bit(__LINK_STATE_XOFF, &dev->state); | |
628 | } | |
629 | ||
630 | static inline int netif_running(const struct net_device *dev) | |
631 | { | |
632 | return test_bit(__LINK_STATE_START, &dev->state); | |
633 | } | |
634 | ||
635 | ||
636 | /* Use this variant when it is known for sure that it | |
637 | * is executing from interrupt context. | |
638 | */ | |
639 | static inline void dev_kfree_skb_irq(struct sk_buff *skb) | |
640 | { | |
641 | if (atomic_dec_and_test(&skb->users)) { | |
642 | struct softnet_data *sd; | |
643 | unsigned long flags; | |
644 | ||
645 | local_irq_save(flags); | |
646 | sd = &__get_cpu_var(softnet_data); | |
647 | skb->next = sd->completion_queue; | |
648 | sd->completion_queue = skb; | |
649 | raise_softirq_irqoff(NET_TX_SOFTIRQ); | |
650 | local_irq_restore(flags); | |
651 | } | |
652 | } | |
653 | ||
654 | /* Use this variant in places where it could be invoked | |
655 | * either from interrupt or non-interrupt context. | |
656 | */ | |
657 | static inline void dev_kfree_skb_any(struct sk_buff *skb) | |
658 | { | |
659 | if (in_irq() || irqs_disabled()) | |
660 | dev_kfree_skb_irq(skb); | |
661 | else | |
662 | dev_kfree_skb(skb); | |
663 | } | |
664 | ||
665 | #define HAVE_NETIF_RX 1 | |
666 | extern int netif_rx(struct sk_buff *skb); | |
667 | extern int netif_rx_ni(struct sk_buff *skb); | |
668 | #define HAVE_NETIF_RECEIVE_SKB 1 | |
669 | extern int netif_receive_skb(struct sk_buff *skb); | |
670 | extern int dev_ioctl(unsigned int cmd, void __user *); | |
671 | extern int dev_ethtool(struct ifreq *); | |
672 | extern unsigned dev_get_flags(const struct net_device *); | |
673 | extern int dev_change_flags(struct net_device *, unsigned); | |
674 | extern int dev_change_name(struct net_device *, char *); | |
675 | extern int dev_set_mtu(struct net_device *, int); | |
676 | extern int dev_set_mac_address(struct net_device *, | |
677 | struct sockaddr *); | |
678 | extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev); | |
679 | ||
680 | extern void dev_init(void); | |
681 | ||
682 | extern int netdev_nit; | |
683 | ||
684 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
685 | extern void netdev_run_todo(void); | |
686 | ||
687 | static inline void dev_put(struct net_device *dev) | |
688 | { | |
689 | atomic_dec(&dev->refcnt); | |
690 | } | |
691 | ||
692 | #define __dev_put(dev) atomic_dec(&(dev)->refcnt) | |
693 | #define dev_hold(dev) atomic_inc(&(dev)->refcnt) | |
694 | ||
695 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
696 | * and _off may be called from IRQ context, but it is caller | |
697 | * who is responsible for serialization of these calls. | |
698 | */ | |
699 | ||
700 | extern void linkwatch_fire_event(struct net_device *dev); | |
701 | ||
702 | static inline int netif_carrier_ok(const struct net_device *dev) | |
703 | { | |
704 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
705 | } | |
706 | ||
707 | extern void __netdev_watchdog_up(struct net_device *dev); | |
708 | ||
709 | static inline void netif_carrier_on(struct net_device *dev) | |
710 | { | |
711 | if (test_and_clear_bit(__LINK_STATE_NOCARRIER, &dev->state)) | |
712 | linkwatch_fire_event(dev); | |
713 | if (netif_running(dev)) | |
714 | __netdev_watchdog_up(dev); | |
715 | } | |
716 | ||
717 | static inline void netif_carrier_off(struct net_device *dev) | |
718 | { | |
719 | if (!test_and_set_bit(__LINK_STATE_NOCARRIER, &dev->state)) | |
720 | linkwatch_fire_event(dev); | |
721 | } | |
722 | ||
723 | /* Hot-plugging. */ | |
724 | static inline int netif_device_present(struct net_device *dev) | |
725 | { | |
726 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
727 | } | |
728 | ||
729 | static inline void netif_device_detach(struct net_device *dev) | |
730 | { | |
731 | if (test_and_clear_bit(__LINK_STATE_PRESENT, &dev->state) && | |
732 | netif_running(dev)) { | |
733 | netif_stop_queue(dev); | |
734 | } | |
735 | } | |
736 | ||
737 | static inline void netif_device_attach(struct net_device *dev) | |
738 | { | |
739 | if (!test_and_set_bit(__LINK_STATE_PRESENT, &dev->state) && | |
740 | netif_running(dev)) { | |
741 | netif_wake_queue(dev); | |
742 | __netdev_watchdog_up(dev); | |
743 | } | |
744 | } | |
745 | ||
746 | /* | |
747 | * Network interface message level settings | |
748 | */ | |
749 | #define HAVE_NETIF_MSG 1 | |
750 | ||
751 | enum { | |
752 | NETIF_MSG_DRV = 0x0001, | |
753 | NETIF_MSG_PROBE = 0x0002, | |
754 | NETIF_MSG_LINK = 0x0004, | |
755 | NETIF_MSG_TIMER = 0x0008, | |
756 | NETIF_MSG_IFDOWN = 0x0010, | |
757 | NETIF_MSG_IFUP = 0x0020, | |
758 | NETIF_MSG_RX_ERR = 0x0040, | |
759 | NETIF_MSG_TX_ERR = 0x0080, | |
760 | NETIF_MSG_TX_QUEUED = 0x0100, | |
761 | NETIF_MSG_INTR = 0x0200, | |
762 | NETIF_MSG_TX_DONE = 0x0400, | |
763 | NETIF_MSG_RX_STATUS = 0x0800, | |
764 | NETIF_MSG_PKTDATA = 0x1000, | |
765 | NETIF_MSG_HW = 0x2000, | |
766 | NETIF_MSG_WOL = 0x4000, | |
767 | }; | |
768 | ||
769 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
770 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
771 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
772 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
773 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
774 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
775 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
776 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
777 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
778 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
779 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
780 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
781 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
782 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
783 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
784 | ||
785 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
786 | { | |
787 | /* use default */ | |
788 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
789 | return default_msg_enable_bits; | |
790 | if (debug_value == 0) /* no output */ | |
791 | return 0; | |
792 | /* set low N bits */ | |
793 | return (1 << debug_value) - 1; | |
794 | } | |
795 | ||
796 | /* Schedule rx intr now? */ | |
797 | ||
798 | static inline int netif_rx_schedule_prep(struct net_device *dev) | |
799 | { | |
800 | return netif_running(dev) && | |
801 | !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state); | |
802 | } | |
803 | ||
804 | /* Add interface to tail of rx poll list. This assumes that _prep has | |
805 | * already been called and returned 1. | |
806 | */ | |
807 | ||
808 | static inline void __netif_rx_schedule(struct net_device *dev) | |
809 | { | |
810 | unsigned long flags; | |
811 | ||
812 | local_irq_save(flags); | |
813 | dev_hold(dev); | |
814 | list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list); | |
815 | if (dev->quota < 0) | |
816 | dev->quota += dev->weight; | |
817 | else | |
818 | dev->quota = dev->weight; | |
819 | __raise_softirq_irqoff(NET_RX_SOFTIRQ); | |
820 | local_irq_restore(flags); | |
821 | } | |
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 | ||
831 | /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). | |
832 | * Do not inline this? | |
833 | */ | |
834 | static inline int netif_rx_reschedule(struct net_device *dev, int undo) | |
835 | { | |
836 | if (netif_rx_schedule_prep(dev)) { | |
837 | unsigned long flags; | |
838 | ||
839 | dev->quota += undo; | |
840 | ||
841 | local_irq_save(flags); | |
842 | list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list); | |
843 | __raise_softirq_irqoff(NET_RX_SOFTIRQ); | |
844 | local_irq_restore(flags); | |
845 | return 1; | |
846 | } | |
847 | return 0; | |
848 | } | |
849 | ||
850 | /* Remove interface from poll list: it must be in the poll list | |
851 | * on current cpu. This primitive is called by dev->poll(), when | |
852 | * it completes the work. The device cannot be out of poll list at this | |
853 | * moment, it is BUG(). | |
854 | */ | |
855 | static inline void netif_rx_complete(struct net_device *dev) | |
856 | { | |
857 | unsigned long flags; | |
858 | ||
859 | local_irq_save(flags); | |
860 | BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state)); | |
861 | list_del(&dev->poll_list); | |
862 | smp_mb__before_clear_bit(); | |
863 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); | |
864 | local_irq_restore(flags); | |
865 | } | |
866 | ||
867 | static inline void netif_poll_disable(struct net_device *dev) | |
868 | { | |
869 | while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state)) { | |
870 | /* No hurry. */ | |
871 | current->state = TASK_INTERRUPTIBLE; | |
872 | schedule_timeout(1); | |
873 | } | |
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); | |
916 | /* Load a device via the kmod */ | |
917 | extern void dev_load(const char *name); | |
918 | extern void dev_mcast_init(void); | |
919 | extern int netdev_max_backlog; | |
920 | extern int weight_p; | |
921 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); | |
922 | extern int skb_checksum_help(struct sk_buff *skb, int inward); | |
923 | /* rx skb timestamps */ | |
924 | extern void net_enable_timestamp(void); | |
925 | extern void net_disable_timestamp(void); | |
926 | ||
927 | #ifdef CONFIG_SYSCTL | |
928 | extern char *net_sysctl_strdup(const char *s); | |
929 | #endif | |
930 | ||
931 | #endif /* __KERNEL__ */ | |
932 | ||
933 | #endif /* _LINUX_DEV_H */ |