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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; | |
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, | |
1da177e4 LT |
235 | }; |
236 | ||
237 | ||
238 | /* | |
239 | * This structure holds at boot time configured netdevice settings. They | |
240 | * are then used in the device probing. | |
241 | */ | |
242 | struct netdev_boot_setup { | |
243 | char name[IFNAMSIZ]; | |
244 | struct ifmap map; | |
245 | }; | |
246 | #define NETDEV_BOOT_SETUP_MAX 8 | |
247 | ||
20380731 | 248 | extern int __init netdev_boot_setup(char *str); |
1da177e4 LT |
249 | |
250 | /* | |
251 | * The DEVICE structure. | |
252 | * Actually, this whole structure is a big mistake. It mixes I/O | |
253 | * data with strictly "high-level" data, and it has to know about | |
254 | * almost every data structure used in the INET module. | |
255 | * | |
256 | * FIXME: cleanup struct net_device such that network protocol info | |
257 | * moves out. | |
258 | */ | |
259 | ||
260 | struct net_device | |
261 | { | |
262 | ||
263 | /* | |
264 | * This is the first field of the "visible" part of this structure | |
265 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
266 | * the interface. | |
267 | */ | |
268 | char name[IFNAMSIZ]; | |
9356b8fc ED |
269 | /* device name hash chain */ |
270 | struct hlist_node name_hlist; | |
1da177e4 LT |
271 | |
272 | /* | |
273 | * I/O specific fields | |
274 | * FIXME: Merge these and struct ifmap into one | |
275 | */ | |
276 | unsigned long mem_end; /* shared mem end */ | |
277 | unsigned long mem_start; /* shared mem start */ | |
278 | unsigned long base_addr; /* device I/O address */ | |
279 | unsigned int irq; /* device IRQ number */ | |
280 | ||
281 | /* | |
282 | * Some hardware also needs these fields, but they are not | |
283 | * part of the usual set specified in Space.c. | |
284 | */ | |
285 | ||
286 | unsigned char if_port; /* Selectable AUI, TP,..*/ | |
287 | unsigned char dma; /* DMA channel */ | |
288 | ||
289 | unsigned long state; | |
290 | ||
291 | struct net_device *next; | |
292 | ||
293 | /* The device initialization function. Called only once. */ | |
294 | int (*init)(struct net_device *dev); | |
295 | ||
296 | /* ------- Fields preinitialized in Space.c finish here ------- */ | |
297 | ||
9356b8fc ED |
298 | /* Net device features */ |
299 | unsigned long features; | |
300 | #define NETIF_F_SG 1 /* Scatter/gather IO. */ | |
301 | #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */ | |
302 | #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ | |
303 | #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ | |
304 | #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ | |
305 | #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ | |
306 | #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ | |
307 | #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ | |
308 | #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ | |
309 | #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ | |
310 | #define NETIF_F_TSO 2048 /* Can offload TCP/IP segmentation */ | |
311 | #define NETIF_F_LLTX 4096 /* LockLess TX */ | |
e89e9cf5 | 312 | #define NETIF_F_UFO 8192 /* Can offload UDP Large Send*/ |
9356b8fc | 313 | |
1da177e4 LT |
314 | struct net_device *next_sched; |
315 | ||
316 | /* Interface index. Unique device identifier */ | |
317 | int ifindex; | |
318 | int iflink; | |
319 | ||
320 | ||
321 | struct net_device_stats* (*get_stats)(struct net_device *dev); | |
322 | struct iw_statistics* (*get_wireless_stats)(struct net_device *dev); | |
323 | ||
324 | /* List of functions to handle Wireless Extensions (instead of ioctl). | |
325 | * See <net/iw_handler.h> for details. Jean II */ | |
326 | const struct iw_handler_def * wireless_handlers; | |
327 | /* Instance data managed by the core of Wireless Extensions. */ | |
328 | struct iw_public_data * wireless_data; | |
329 | ||
330 | struct ethtool_ops *ethtool_ops; | |
331 | ||
332 | /* | |
333 | * This marks the end of the "visible" part of the structure. All | |
334 | * fields hereafter are internal to the system, and may change at | |
335 | * will (read: may be cleaned up at will). | |
336 | */ | |
337 | ||
1da177e4 | 338 | |
b00055aa | 339 | unsigned int flags; /* interface flags (a la BSD) */ |
1da177e4 LT |
340 | unsigned short gflags; |
341 | unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ | |
342 | unsigned short padded; /* How much padding added by alloc_netdev() */ | |
343 | ||
b00055aa SR |
344 | unsigned char operstate; /* RFC2863 operstate */ |
345 | unsigned char link_mode; /* mapping policy to operstate */ | |
346 | ||
1da177e4 LT |
347 | unsigned mtu; /* interface MTU value */ |
348 | unsigned short type; /* interface hardware type */ | |
349 | unsigned short hard_header_len; /* hardware hdr length */ | |
1da177e4 LT |
350 | |
351 | struct net_device *master; /* Pointer to master device of a group, | |
352 | * which this device is member of. | |
353 | */ | |
354 | ||
355 | /* Interface address info. */ | |
a6f9a705 | 356 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
1da177e4 LT |
357 | unsigned char addr_len; /* hardware address length */ |
358 | unsigned short dev_id; /* for shared network cards */ | |
359 | ||
360 | struct dev_mc_list *mc_list; /* Multicast mac addresses */ | |
361 | int mc_count; /* Number of installed mcasts */ | |
362 | int promiscuity; | |
363 | int allmulti; | |
364 | ||
1da177e4 LT |
365 | |
366 | /* Protocol specific pointers */ | |
367 | ||
368 | void *atalk_ptr; /* AppleTalk link */ | |
369 | void *ip_ptr; /* IPv4 specific data */ | |
370 | void *dn_ptr; /* DECnet specific data */ | |
371 | void *ip6_ptr; /* IPv6 specific data */ | |
372 | void *ec_ptr; /* Econet specific data */ | |
373 | void *ax25_ptr; /* AX.25 specific data */ | |
374 | ||
9356b8fc ED |
375 | /* |
376 | * Cache line mostly used on receive path (including eth_type_trans()) | |
377 | */ | |
378 | struct list_head poll_list ____cacheline_aligned_in_smp; | |
379 | /* Link to poll list */ | |
380 | ||
381 | int (*poll) (struct net_device *dev, int *quota); | |
1da177e4 LT |
382 | int quota; |
383 | int weight; | |
9356b8fc ED |
384 | unsigned long last_rx; /* Time of last Rx */ |
385 | /* Interface address info used in eth_type_trans() */ | |
386 | unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast | |
387 | because most packets are unicast) */ | |
388 | ||
389 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ | |
1da177e4 | 390 | |
9356b8fc ED |
391 | /* |
392 | * Cache line mostly used on queue transmit path (qdisc) | |
393 | */ | |
394 | /* device queue lock */ | |
395 | spinlock_t queue_lock ____cacheline_aligned_in_smp; | |
1da177e4 LT |
396 | struct Qdisc *qdisc; |
397 | struct Qdisc *qdisc_sleeping; | |
1da177e4 LT |
398 | struct list_head qdisc_list; |
399 | unsigned long tx_queue_len; /* Max frames per queue allowed */ | |
400 | ||
401 | /* ingress path synchronizer */ | |
402 | spinlock_t ingress_lock; | |
9356b8fc ED |
403 | struct Qdisc *qdisc_ingress; |
404 | ||
405 | /* | |
406 | * One part is mostly used on xmit path (device) | |
407 | */ | |
1da177e4 | 408 | /* hard_start_xmit synchronizer */ |
9356b8fc | 409 | spinlock_t xmit_lock ____cacheline_aligned_in_smp; |
1da177e4 LT |
410 | /* cpu id of processor entered to hard_start_xmit or -1, |
411 | if nobody entered there. | |
412 | */ | |
413 | int xmit_lock_owner; | |
9356b8fc ED |
414 | void *priv; /* pointer to private data */ |
415 | int (*hard_start_xmit) (struct sk_buff *skb, | |
416 | struct net_device *dev); | |
417 | /* These may be needed for future network-power-down code. */ | |
418 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ | |
419 | ||
420 | int watchdog_timeo; /* used by dev_watchdog() */ | |
421 | struct timer_list watchdog_timer; | |
422 | ||
423 | /* | |
424 | * refcnt is a very hot point, so align it on SMP | |
425 | */ | |
1da177e4 | 426 | /* Number of references to this device */ |
9356b8fc ED |
427 | atomic_t refcnt ____cacheline_aligned_in_smp; |
428 | ||
1da177e4 LT |
429 | /* delayed register/unregister */ |
430 | struct list_head todo_list; | |
1da177e4 LT |
431 | /* device index hash chain */ |
432 | struct hlist_node index_hlist; | |
433 | ||
434 | /* register/unregister state machine */ | |
435 | enum { NETREG_UNINITIALIZED=0, | |
436 | NETREG_REGISTERING, /* called register_netdevice */ | |
437 | NETREG_REGISTERED, /* completed register todo */ | |
438 | NETREG_UNREGISTERING, /* called unregister_netdevice */ | |
439 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
440 | NETREG_RELEASED, /* called free_netdev */ | |
441 | } reg_state; | |
442 | ||
1da177e4 LT |
443 | /* Called after device is detached from network. */ |
444 | void (*uninit)(struct net_device *dev); | |
445 | /* Called after last user reference disappears. */ | |
446 | void (*destructor)(struct net_device *dev); | |
447 | ||
448 | /* Pointers to interface service routines. */ | |
449 | int (*open)(struct net_device *dev); | |
450 | int (*stop)(struct net_device *dev); | |
1da177e4 | 451 | #define HAVE_NETDEV_POLL |
1da177e4 LT |
452 | int (*hard_header) (struct sk_buff *skb, |
453 | struct net_device *dev, | |
454 | unsigned short type, | |
455 | void *daddr, | |
456 | void *saddr, | |
457 | unsigned len); | |
458 | int (*rebuild_header)(struct sk_buff *skb); | |
459 | #define HAVE_MULTICAST | |
460 | void (*set_multicast_list)(struct net_device *dev); | |
461 | #define HAVE_SET_MAC_ADDR | |
462 | int (*set_mac_address)(struct net_device *dev, | |
463 | void *addr); | |
464 | #define HAVE_PRIVATE_IOCTL | |
465 | int (*do_ioctl)(struct net_device *dev, | |
466 | struct ifreq *ifr, int cmd); | |
467 | #define HAVE_SET_CONFIG | |
468 | int (*set_config)(struct net_device *dev, | |
469 | struct ifmap *map); | |
470 | #define HAVE_HEADER_CACHE | |
471 | int (*hard_header_cache)(struct neighbour *neigh, | |
472 | struct hh_cache *hh); | |
473 | void (*header_cache_update)(struct hh_cache *hh, | |
474 | struct net_device *dev, | |
475 | unsigned char * haddr); | |
476 | #define HAVE_CHANGE_MTU | |
477 | int (*change_mtu)(struct net_device *dev, int new_mtu); | |
478 | ||
479 | #define HAVE_TX_TIMEOUT | |
480 | void (*tx_timeout) (struct net_device *dev); | |
481 | ||
482 | void (*vlan_rx_register)(struct net_device *dev, | |
483 | struct vlan_group *grp); | |
484 | void (*vlan_rx_add_vid)(struct net_device *dev, | |
485 | unsigned short vid); | |
486 | void (*vlan_rx_kill_vid)(struct net_device *dev, | |
487 | unsigned short vid); | |
488 | ||
489 | int (*hard_header_parse)(struct sk_buff *skb, | |
490 | unsigned char *haddr); | |
491 | int (*neigh_setup)(struct net_device *dev, struct neigh_parms *); | |
492 | #ifdef CONFIG_NETPOLL | |
115c1d6e | 493 | struct netpoll_info *npinfo; |
1da177e4 LT |
494 | #endif |
495 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
496 | void (*poll_controller)(struct net_device *dev); | |
497 | #endif | |
498 | ||
499 | /* bridge stuff */ | |
500 | struct net_bridge_port *br_port; | |
501 | ||
502 | #ifdef CONFIG_NET_DIVERT | |
503 | /* this will get initialized at each interface type init routine */ | |
504 | struct divert_blk *divert; | |
505 | #endif /* CONFIG_NET_DIVERT */ | |
506 | ||
507 | /* class/net/name entry */ | |
508 | struct class_device class_dev; | |
509 | }; | |
510 | ||
511 | #define NETDEV_ALIGN 32 | |
512 | #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) | |
513 | ||
514 | static inline void *netdev_priv(struct net_device *dev) | |
515 | { | |
516 | return (char *)dev + ((sizeof(struct net_device) | |
517 | + NETDEV_ALIGN_CONST) | |
518 | & ~NETDEV_ALIGN_CONST); | |
519 | } | |
520 | ||
521 | #define SET_MODULE_OWNER(dev) do { } while (0) | |
522 | /* Set the sysfs physical device reference for the network logical device | |
523 | * if set prior to registration will cause a symlink during initialization. | |
524 | */ | |
525 | #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev)) | |
526 | ||
527 | struct packet_type { | |
f2ccd8fa DM |
528 | __be16 type; /* This is really htons(ether_type). */ |
529 | struct net_device *dev; /* NULL is wildcarded here */ | |
530 | int (*func) (struct sk_buff *, | |
531 | struct net_device *, | |
532 | struct packet_type *, | |
533 | struct net_device *); | |
1da177e4 LT |
534 | void *af_packet_priv; |
535 | struct list_head list; | |
536 | }; | |
537 | ||
538 | #include <linux/interrupt.h> | |
539 | #include <linux/notifier.h> | |
540 | ||
541 | extern struct net_device loopback_dev; /* The loopback */ | |
542 | extern struct net_device *dev_base; /* All devices */ | |
543 | extern rwlock_t dev_base_lock; /* Device list lock */ | |
544 | ||
545 | extern int netdev_boot_setup_check(struct net_device *dev); | |
546 | extern unsigned long netdev_boot_base(const char *prefix, int unit); | |
547 | extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr); | |
548 | extern struct net_device *dev_getfirstbyhwtype(unsigned short type); | |
549 | extern void dev_add_pack(struct packet_type *pt); | |
550 | extern void dev_remove_pack(struct packet_type *pt); | |
551 | extern void __dev_remove_pack(struct packet_type *pt); | |
552 | ||
553 | extern struct net_device *dev_get_by_flags(unsigned short flags, | |
554 | unsigned short mask); | |
555 | extern struct net_device *dev_get_by_name(const char *name); | |
556 | extern struct net_device *__dev_get_by_name(const char *name); | |
557 | extern int dev_alloc_name(struct net_device *dev, const char *name); | |
558 | extern int dev_open(struct net_device *dev); | |
559 | extern int dev_close(struct net_device *dev); | |
560 | extern int dev_queue_xmit(struct sk_buff *skb); | |
561 | extern int register_netdevice(struct net_device *dev); | |
562 | extern int unregister_netdevice(struct net_device *dev); | |
563 | extern void free_netdev(struct net_device *dev); | |
564 | extern void synchronize_net(void); | |
565 | extern int register_netdevice_notifier(struct notifier_block *nb); | |
566 | extern int unregister_netdevice_notifier(struct notifier_block *nb); | |
567 | extern int call_netdevice_notifiers(unsigned long val, void *v); | |
568 | extern struct net_device *dev_get_by_index(int ifindex); | |
569 | extern struct net_device *__dev_get_by_index(int ifindex); | |
570 | extern int dev_restart(struct net_device *dev); | |
571 | #ifdef CONFIG_NETPOLL_TRAP | |
572 | extern int netpoll_trap(void); | |
573 | #endif | |
574 | ||
575 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); | |
576 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); | |
577 | static inline int unregister_gifconf(unsigned int family) | |
578 | { | |
579 | return register_gifconf(family, NULL); | |
580 | } | |
581 | ||
582 | /* | |
583 | * Incoming packets are placed on per-cpu queues so that | |
584 | * no locking is needed. | |
585 | */ | |
586 | ||
587 | struct softnet_data | |
588 | { | |
31aa02c5 | 589 | struct net_device *output_queue; |
1da177e4 LT |
590 | struct sk_buff_head input_pkt_queue; |
591 | struct list_head poll_list; | |
1da177e4 LT |
592 | struct sk_buff *completion_queue; |
593 | ||
594 | struct net_device backlog_dev; /* Sorry. 8) */ | |
595 | }; | |
596 | ||
597 | DECLARE_PER_CPU(struct softnet_data,softnet_data); | |
598 | ||
599 | #define HAVE_NETIF_QUEUE | |
600 | ||
601 | static inline void __netif_schedule(struct net_device *dev) | |
602 | { | |
603 | if (!test_and_set_bit(__LINK_STATE_SCHED, &dev->state)) { | |
604 | unsigned long flags; | |
605 | struct softnet_data *sd; | |
606 | ||
607 | local_irq_save(flags); | |
608 | sd = &__get_cpu_var(softnet_data); | |
609 | dev->next_sched = sd->output_queue; | |
610 | sd->output_queue = dev; | |
611 | raise_softirq_irqoff(NET_TX_SOFTIRQ); | |
612 | local_irq_restore(flags); | |
613 | } | |
614 | } | |
615 | ||
616 | static inline void netif_schedule(struct net_device *dev) | |
617 | { | |
618 | if (!test_bit(__LINK_STATE_XOFF, &dev->state)) | |
619 | __netif_schedule(dev); | |
620 | } | |
621 | ||
622 | static inline void netif_start_queue(struct net_device *dev) | |
623 | { | |
624 | clear_bit(__LINK_STATE_XOFF, &dev->state); | |
625 | } | |
626 | ||
627 | static inline void netif_wake_queue(struct net_device *dev) | |
628 | { | |
629 | #ifdef CONFIG_NETPOLL_TRAP | |
630 | if (netpoll_trap()) | |
631 | return; | |
632 | #endif | |
633 | if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state)) | |
634 | __netif_schedule(dev); | |
635 | } | |
636 | ||
637 | static inline void netif_stop_queue(struct net_device *dev) | |
638 | { | |
639 | #ifdef CONFIG_NETPOLL_TRAP | |
640 | if (netpoll_trap()) | |
641 | return; | |
642 | #endif | |
643 | set_bit(__LINK_STATE_XOFF, &dev->state); | |
644 | } | |
645 | ||
646 | static inline int netif_queue_stopped(const struct net_device *dev) | |
647 | { | |
648 | return test_bit(__LINK_STATE_XOFF, &dev->state); | |
649 | } | |
650 | ||
651 | static inline int netif_running(const struct net_device *dev) | |
652 | { | |
653 | return test_bit(__LINK_STATE_START, &dev->state); | |
654 | } | |
655 | ||
656 | ||
657 | /* Use this variant when it is known for sure that it | |
658 | * is executing from interrupt context. | |
659 | */ | |
660 | static inline void dev_kfree_skb_irq(struct sk_buff *skb) | |
661 | { | |
662 | if (atomic_dec_and_test(&skb->users)) { | |
663 | struct softnet_data *sd; | |
664 | unsigned long flags; | |
665 | ||
666 | local_irq_save(flags); | |
667 | sd = &__get_cpu_var(softnet_data); | |
668 | skb->next = sd->completion_queue; | |
669 | sd->completion_queue = skb; | |
670 | raise_softirq_irqoff(NET_TX_SOFTIRQ); | |
671 | local_irq_restore(flags); | |
672 | } | |
673 | } | |
674 | ||
675 | /* Use this variant in places where it could be invoked | |
676 | * either from interrupt or non-interrupt context. | |
677 | */ | |
678 | static inline void dev_kfree_skb_any(struct sk_buff *skb) | |
679 | { | |
680 | if (in_irq() || irqs_disabled()) | |
681 | dev_kfree_skb_irq(skb); | |
682 | else | |
683 | dev_kfree_skb(skb); | |
684 | } | |
685 | ||
686 | #define HAVE_NETIF_RX 1 | |
687 | extern int netif_rx(struct sk_buff *skb); | |
688 | extern int netif_rx_ni(struct sk_buff *skb); | |
689 | #define HAVE_NETIF_RECEIVE_SKB 1 | |
690 | extern int netif_receive_skb(struct sk_buff *skb); | |
c2373ee9 | 691 | extern int dev_valid_name(const char *name); |
1da177e4 LT |
692 | extern int dev_ioctl(unsigned int cmd, void __user *); |
693 | extern int dev_ethtool(struct ifreq *); | |
694 | extern unsigned dev_get_flags(const struct net_device *); | |
695 | extern int dev_change_flags(struct net_device *, unsigned); | |
696 | extern int dev_change_name(struct net_device *, char *); | |
697 | extern int dev_set_mtu(struct net_device *, int); | |
698 | extern int dev_set_mac_address(struct net_device *, | |
699 | struct sockaddr *); | |
700 | extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev); | |
701 | ||
702 | extern void dev_init(void); | |
703 | ||
704 | extern int netdev_nit; | |
20380731 | 705 | extern int netdev_budget; |
1da177e4 LT |
706 | |
707 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
708 | extern void netdev_run_todo(void); | |
709 | ||
710 | static inline void dev_put(struct net_device *dev) | |
711 | { | |
712 | atomic_dec(&dev->refcnt); | |
713 | } | |
714 | ||
15333061 SH |
715 | static inline void dev_hold(struct net_device *dev) |
716 | { | |
717 | atomic_inc(&dev->refcnt); | |
718 | } | |
1da177e4 LT |
719 | |
720 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
721 | * and _off may be called from IRQ context, but it is caller | |
722 | * who is responsible for serialization of these calls. | |
b00055aa SR |
723 | * |
724 | * The name carrier is inappropriate, these functions should really be | |
725 | * called netif_lowerlayer_*() because they represent the state of any | |
726 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
727 | */ |
728 | ||
729 | extern void linkwatch_fire_event(struct net_device *dev); | |
730 | ||
731 | static inline int netif_carrier_ok(const struct net_device *dev) | |
732 | { | |
733 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
734 | } | |
735 | ||
736 | extern void __netdev_watchdog_up(struct net_device *dev); | |
737 | ||
0a242efc | 738 | extern void netif_carrier_on(struct net_device *dev); |
1da177e4 | 739 | |
0a242efc | 740 | extern void netif_carrier_off(struct net_device *dev); |
1da177e4 | 741 | |
b00055aa SR |
742 | static inline void netif_dormant_on(struct net_device *dev) |
743 | { | |
744 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
745 | linkwatch_fire_event(dev); | |
746 | } | |
747 | ||
748 | static inline void netif_dormant_off(struct net_device *dev) | |
749 | { | |
750 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
751 | linkwatch_fire_event(dev); | |
752 | } | |
753 | ||
754 | static inline int netif_dormant(const struct net_device *dev) | |
755 | { | |
756 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
757 | } | |
758 | ||
759 | ||
760 | static inline int netif_oper_up(const struct net_device *dev) { | |
761 | return (dev->operstate == IF_OPER_UP || | |
762 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
763 | } | |
764 | ||
1da177e4 LT |
765 | /* Hot-plugging. */ |
766 | static inline int netif_device_present(struct net_device *dev) | |
767 | { | |
768 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
769 | } | |
770 | ||
771 | static inline void netif_device_detach(struct net_device *dev) | |
772 | { | |
773 | if (test_and_clear_bit(__LINK_STATE_PRESENT, &dev->state) && | |
774 | netif_running(dev)) { | |
775 | netif_stop_queue(dev); | |
776 | } | |
777 | } | |
778 | ||
779 | static inline void netif_device_attach(struct net_device *dev) | |
780 | { | |
781 | if (!test_and_set_bit(__LINK_STATE_PRESENT, &dev->state) && | |
782 | netif_running(dev)) { | |
783 | netif_wake_queue(dev); | |
784 | __netdev_watchdog_up(dev); | |
785 | } | |
786 | } | |
787 | ||
788 | /* | |
789 | * Network interface message level settings | |
790 | */ | |
791 | #define HAVE_NETIF_MSG 1 | |
792 | ||
793 | enum { | |
794 | NETIF_MSG_DRV = 0x0001, | |
795 | NETIF_MSG_PROBE = 0x0002, | |
796 | NETIF_MSG_LINK = 0x0004, | |
797 | NETIF_MSG_TIMER = 0x0008, | |
798 | NETIF_MSG_IFDOWN = 0x0010, | |
799 | NETIF_MSG_IFUP = 0x0020, | |
800 | NETIF_MSG_RX_ERR = 0x0040, | |
801 | NETIF_MSG_TX_ERR = 0x0080, | |
802 | NETIF_MSG_TX_QUEUED = 0x0100, | |
803 | NETIF_MSG_INTR = 0x0200, | |
804 | NETIF_MSG_TX_DONE = 0x0400, | |
805 | NETIF_MSG_RX_STATUS = 0x0800, | |
806 | NETIF_MSG_PKTDATA = 0x1000, | |
807 | NETIF_MSG_HW = 0x2000, | |
808 | NETIF_MSG_WOL = 0x4000, | |
809 | }; | |
810 | ||
811 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
812 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
813 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
814 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
815 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
816 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
817 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
818 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
819 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
820 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
821 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
822 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
823 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
824 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
825 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
826 | ||
827 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
828 | { | |
829 | /* use default */ | |
830 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
831 | return default_msg_enable_bits; | |
832 | if (debug_value == 0) /* no output */ | |
833 | return 0; | |
834 | /* set low N bits */ | |
835 | return (1 << debug_value) - 1; | |
836 | } | |
837 | ||
0a122576 SH |
838 | /* Test if receive needs to be scheduled */ |
839 | static inline int __netif_rx_schedule_prep(struct net_device *dev) | |
793b883e SH |
840 | { |
841 | return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state); | |
842 | } | |
1da177e4 | 843 | |
0a122576 | 844 | /* Test if receive needs to be scheduled but only if up */ |
1da177e4 LT |
845 | static inline int netif_rx_schedule_prep(struct net_device *dev) |
846 | { | |
0a122576 | 847 | return netif_running(dev) && __netif_rx_schedule_prep(dev); |
1da177e4 LT |
848 | } |
849 | ||
850 | /* Add interface to tail of rx poll list. This assumes that _prep has | |
851 | * already been called and returned 1. | |
852 | */ | |
853 | ||
854 | static inline void __netif_rx_schedule(struct net_device *dev) | |
855 | { | |
856 | unsigned long flags; | |
857 | ||
858 | local_irq_save(flags); | |
859 | dev_hold(dev); | |
860 | list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list); | |
861 | if (dev->quota < 0) | |
862 | dev->quota += dev->weight; | |
863 | else | |
864 | dev->quota = dev->weight; | |
865 | __raise_softirq_irqoff(NET_RX_SOFTIRQ); | |
866 | local_irq_restore(flags); | |
867 | } | |
868 | ||
869 | /* Try to reschedule poll. Called by irq handler. */ | |
870 | ||
871 | static inline void netif_rx_schedule(struct net_device *dev) | |
872 | { | |
873 | if (netif_rx_schedule_prep(dev)) | |
874 | __netif_rx_schedule(dev); | |
875 | } | |
876 | ||
877 | /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). | |
878 | * Do not inline this? | |
879 | */ | |
880 | static inline int netif_rx_reschedule(struct net_device *dev, int undo) | |
881 | { | |
882 | if (netif_rx_schedule_prep(dev)) { | |
883 | unsigned long flags; | |
884 | ||
885 | dev->quota += undo; | |
886 | ||
887 | local_irq_save(flags); | |
888 | list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list); | |
889 | __raise_softirq_irqoff(NET_RX_SOFTIRQ); | |
890 | local_irq_restore(flags); | |
891 | return 1; | |
892 | } | |
893 | return 0; | |
894 | } | |
895 | ||
896 | /* Remove interface from poll list: it must be in the poll list | |
897 | * on current cpu. This primitive is called by dev->poll(), when | |
898 | * it completes the work. The device cannot be out of poll list at this | |
899 | * moment, it is BUG(). | |
900 | */ | |
901 | static inline void netif_rx_complete(struct net_device *dev) | |
902 | { | |
903 | unsigned long flags; | |
904 | ||
905 | local_irq_save(flags); | |
906 | BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state)); | |
907 | list_del(&dev->poll_list); | |
908 | smp_mb__before_clear_bit(); | |
909 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); | |
910 | local_irq_restore(flags); | |
911 | } | |
912 | ||
913 | static inline void netif_poll_disable(struct net_device *dev) | |
914 | { | |
3173c890 | 915 | while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state)) |
1da177e4 | 916 | /* No hurry. */ |
3173c890 | 917 | schedule_timeout_interruptible(1); |
1da177e4 LT |
918 | } |
919 | ||
920 | static inline void netif_poll_enable(struct net_device *dev) | |
921 | { | |
922 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); | |
923 | } | |
924 | ||
925 | /* same as netif_rx_complete, except that local_irq_save(flags) | |
926 | * has already been issued | |
927 | */ | |
928 | static inline void __netif_rx_complete(struct net_device *dev) | |
929 | { | |
930 | BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state)); | |
931 | list_del(&dev->poll_list); | |
932 | smp_mb__before_clear_bit(); | |
933 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); | |
934 | } | |
935 | ||
936 | static inline void netif_tx_disable(struct net_device *dev) | |
937 | { | |
938 | spin_lock_bh(&dev->xmit_lock); | |
939 | netif_stop_queue(dev); | |
940 | spin_unlock_bh(&dev->xmit_lock); | |
941 | } | |
942 | ||
943 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ | |
944 | ||
945 | extern void ether_setup(struct net_device *dev); | |
946 | ||
947 | /* Support for loadable net-drivers */ | |
948 | extern struct net_device *alloc_netdev(int sizeof_priv, const char *name, | |
949 | void (*setup)(struct net_device *)); | |
950 | extern int register_netdev(struct net_device *dev); | |
951 | extern void unregister_netdev(struct net_device *dev); | |
952 | /* Functions used for multicast support */ | |
953 | extern void dev_mc_upload(struct net_device *dev); | |
954 | extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); | |
955 | extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); | |
956 | extern void dev_mc_discard(struct net_device *dev); | |
957 | extern void dev_set_promiscuity(struct net_device *dev, int inc); | |
958 | extern void dev_set_allmulti(struct net_device *dev, int inc); | |
959 | extern void netdev_state_change(struct net_device *dev); | |
d8a33ac4 | 960 | extern void netdev_features_change(struct net_device *dev); |
1da177e4 LT |
961 | /* Load a device via the kmod */ |
962 | extern void dev_load(const char *name); | |
963 | extern void dev_mcast_init(void); | |
964 | extern int netdev_max_backlog; | |
965 | extern int weight_p; | |
966 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); | |
967 | extern int skb_checksum_help(struct sk_buff *skb, int inward); | |
fb286bb2 HX |
968 | #ifdef CONFIG_BUG |
969 | extern void netdev_rx_csum_fault(struct net_device *dev); | |
970 | #else | |
971 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
972 | { | |
973 | } | |
974 | #endif | |
1da177e4 LT |
975 | /* rx skb timestamps */ |
976 | extern void net_enable_timestamp(void); | |
977 | extern void net_disable_timestamp(void); | |
978 | ||
20380731 ACM |
979 | #ifdef CONFIG_PROC_FS |
980 | extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); | |
981 | extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); | |
982 | extern void dev_seq_stop(struct seq_file *seq, void *v); | |
983 | #endif | |
984 | ||
985 | extern void linkwatch_run_queue(void); | |
986 | ||
1da177e4 LT |
987 | #endif /* __KERNEL__ */ |
988 | ||
989 | #endif /* _LINUX_DEV_H */ |