Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * An implementation of the Acorn Econet and AUN protocols. | |
3 | * Philip Blundell <philb@gnu.org> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License | |
7 | * as published by the Free Software Foundation; either version | |
8 | * 2 of the License, or (at your option) any later version. | |
9 | * | |
10 | */ | |
11 | ||
1da177e4 LT |
12 | #include <linux/module.h> |
13 | ||
14 | #include <linux/types.h> | |
15 | #include <linux/kernel.h> | |
1da177e4 LT |
16 | #include <linux/string.h> |
17 | #include <linux/mm.h> | |
18 | #include <linux/socket.h> | |
19 | #include <linux/sockios.h> | |
20 | #include <linux/in.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/if_ether.h> | |
24 | #include <linux/netdevice.h> | |
25 | #include <linux/inetdevice.h> | |
26 | #include <linux/route.h> | |
27 | #include <linux/inet.h> | |
28 | #include <linux/etherdevice.h> | |
29 | #include <linux/if_arp.h> | |
30 | #include <linux/wireless.h> | |
31 | #include <linux/skbuff.h> | |
14c85021 | 32 | #include <linux/udp.h> |
5a0e3ad6 | 33 | #include <linux/slab.h> |
1da177e4 LT |
34 | #include <net/sock.h> |
35 | #include <net/inet_common.h> | |
36 | #include <linux/stat.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/if_ec.h> | |
39 | #include <net/udp.h> | |
40 | #include <net/ip.h> | |
41 | #include <linux/spinlock.h> | |
42 | #include <linux/rcupdate.h> | |
43 | #include <linux/bitops.h> | |
1d181831 | 44 | #include <linux/mutex.h> |
1da177e4 LT |
45 | |
46 | #include <asm/uaccess.h> | |
47 | #include <asm/system.h> | |
48 | ||
90ddc4f0 | 49 | static const struct proto_ops econet_ops; |
1da177e4 | 50 | static struct hlist_head econet_sklist; |
0c78a92f | 51 | static DEFINE_SPINLOCK(econet_lock); |
1d181831 | 52 | static DEFINE_MUTEX(econet_mutex); |
1da177e4 LT |
53 | |
54 | /* Since there are only 256 possible network numbers (or fewer, depends | |
55 | how you count) it makes sense to use a simple lookup table. */ | |
56 | static struct net_device *net2dev_map[256]; | |
57 | ||
58 | #define EC_PORT_IP 0xd2 | |
59 | ||
60 | #ifdef CONFIG_ECONET_AUNUDP | |
ca403302 | 61 | static DEFINE_SPINLOCK(aun_queue_lock); |
1da177e4 LT |
62 | static struct socket *udpsock; |
63 | #define AUN_PORT 0x8000 | |
64 | ||
65 | ||
66 | struct aunhdr | |
67 | { | |
68 | unsigned char code; /* AUN magic protocol byte */ | |
69 | unsigned char port; | |
70 | unsigned char cb; | |
71 | unsigned char pad; | |
72 | unsigned long handle; | |
73 | }; | |
74 | ||
75 | static unsigned long aun_seq; | |
76 | ||
77 | /* Queue of packets waiting to be transmitted. */ | |
78 | static struct sk_buff_head aun_queue; | |
79 | static struct timer_list ab_cleanup_timer; | |
80 | ||
81 | #endif /* CONFIG_ECONET_AUNUDP */ | |
82 | ||
83 | /* Per-packet information */ | |
84 | struct ec_cb | |
85 | { | |
86 | struct sockaddr_ec sec; | |
87 | unsigned long cookie; /* Supplied by user. */ | |
88 | #ifdef CONFIG_ECONET_AUNUDP | |
89 | int done; | |
90 | unsigned long seq; /* Sequencing */ | |
91 | unsigned long timeout; /* Timeout */ | |
92 | unsigned long start; /* jiffies */ | |
93 | #endif | |
94 | #ifdef CONFIG_ECONET_NATIVE | |
95 | void (*sent)(struct sk_buff *, int result); | |
96 | #endif | |
97 | }; | |
98 | ||
99 | static void econet_remove_socket(struct hlist_head *list, struct sock *sk) | |
100 | { | |
0c78a92f | 101 | spin_lock_bh(&econet_lock); |
1da177e4 | 102 | sk_del_node_init(sk); |
0c78a92f | 103 | spin_unlock_bh(&econet_lock); |
1da177e4 LT |
104 | } |
105 | ||
106 | static void econet_insert_socket(struct hlist_head *list, struct sock *sk) | |
107 | { | |
0c78a92f | 108 | spin_lock_bh(&econet_lock); |
1da177e4 | 109 | sk_add_node(sk, list); |
0c78a92f | 110 | spin_unlock_bh(&econet_lock); |
1da177e4 LT |
111 | } |
112 | ||
113 | /* | |
114 | * Pull a packet from our receive queue and hand it to the user. | |
115 | * If necessary we block. | |
116 | */ | |
117 | ||
118 | static int econet_recvmsg(struct kiocb *iocb, struct socket *sock, | |
119 | struct msghdr *msg, size_t len, int flags) | |
120 | { | |
121 | struct sock *sk = sock->sk; | |
122 | struct sk_buff *skb; | |
123 | size_t copied; | |
124 | int err; | |
125 | ||
126 | msg->msg_namelen = sizeof(struct sockaddr_ec); | |
127 | ||
1d181831 DM |
128 | mutex_lock(&econet_mutex); |
129 | ||
1da177e4 LT |
130 | /* |
131 | * Call the generic datagram receiver. This handles all sorts | |
132 | * of horrible races and re-entrancy so we can forget about it | |
133 | * in the protocol layers. | |
134 | * | |
135 | * Now it will return ENETDOWN, if device have just gone down, | |
136 | * but then it will block. | |
137 | */ | |
138 | ||
139 | skb=skb_recv_datagram(sk,flags,flags&MSG_DONTWAIT,&err); | |
140 | ||
141 | /* | |
c9b6aab9 | 142 | * An error occurred so return it. Because skb_recv_datagram() |
1da177e4 LT |
143 | * handles the blocking we don't see and worry about blocking |
144 | * retries. | |
145 | */ | |
146 | ||
147 | if(skb==NULL) | |
148 | goto out; | |
149 | ||
150 | /* | |
151 | * You lose any data beyond the buffer you gave. If it worries a | |
152 | * user program they can ask the device for its MTU anyway. | |
153 | */ | |
154 | ||
155 | copied = skb->len; | |
156 | if (copied > len) | |
157 | { | |
158 | copied=len; | |
159 | msg->msg_flags|=MSG_TRUNC; | |
160 | } | |
161 | ||
162 | /* We can't use skb_copy_datagram here */ | |
163 | err = memcpy_toiovec(msg->msg_iov, skb->data, copied); | |
164 | if (err) | |
165 | goto out_free; | |
b7aa0bf7 | 166 | sk->sk_stamp = skb->tstamp; |
1da177e4 LT |
167 | |
168 | if (msg->msg_name) | |
169 | memcpy(msg->msg_name, skb->cb, msg->msg_namelen); | |
170 | ||
171 | /* | |
172 | * Free or return the buffer as appropriate. Again this | |
173 | * hides all the races and re-entrancy issues from us. | |
174 | */ | |
175 | err = copied; | |
176 | ||
177 | out_free: | |
178 | skb_free_datagram(sk, skb); | |
179 | out: | |
1d181831 | 180 | mutex_unlock(&econet_mutex); |
1da177e4 LT |
181 | return err; |
182 | } | |
183 | ||
184 | /* | |
185 | * Bind an Econet socket. | |
186 | */ | |
187 | ||
188 | static int econet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
189 | { | |
190 | struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr; | |
1d181831 DM |
191 | struct sock *sk; |
192 | struct econet_sock *eo; | |
c9b6aab9 | 193 | |
1da177e4 LT |
194 | /* |
195 | * Check legality | |
196 | */ | |
c9b6aab9 | 197 | |
1da177e4 LT |
198 | if (addr_len < sizeof(struct sockaddr_ec) || |
199 | sec->sec_family != AF_ECONET) | |
200 | return -EINVAL; | |
c9b6aab9 | 201 | |
1d181831 DM |
202 | mutex_lock(&econet_mutex); |
203 | ||
204 | sk = sock->sk; | |
205 | eo = ec_sk(sk); | |
206 | ||
1da177e4 LT |
207 | eo->cb = sec->cb; |
208 | eo->port = sec->port; | |
209 | eo->station = sec->addr.station; | |
210 | eo->net = sec->addr.net; | |
211 | ||
1d181831 DM |
212 | mutex_unlock(&econet_mutex); |
213 | ||
1da177e4 LT |
214 | return 0; |
215 | } | |
216 | ||
217 | #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE) | |
218 | /* | |
219 | * Queue a transmit result for the user to be told about. | |
220 | */ | |
221 | ||
222 | static void tx_result(struct sock *sk, unsigned long cookie, int result) | |
223 | { | |
224 | struct sk_buff *skb = alloc_skb(0, GFP_ATOMIC); | |
225 | struct ec_cb *eb; | |
226 | struct sockaddr_ec *sec; | |
227 | ||
228 | if (skb == NULL) | |
229 | { | |
230 | printk(KERN_DEBUG "ec: memory squeeze, transmit result dropped.\n"); | |
231 | return; | |
232 | } | |
233 | ||
234 | eb = (struct ec_cb *)&skb->cb; | |
235 | sec = (struct sockaddr_ec *)&eb->sec; | |
236 | memset(sec, 0, sizeof(struct sockaddr_ec)); | |
237 | sec->cookie = cookie; | |
238 | sec->type = ECTYPE_TRANSMIT_STATUS | result; | |
239 | sec->sec_family = AF_ECONET; | |
240 | ||
241 | if (sock_queue_rcv_skb(sk, skb) < 0) | |
242 | kfree_skb(skb); | |
243 | } | |
244 | #endif | |
245 | ||
246 | #ifdef CONFIG_ECONET_NATIVE | |
247 | /* | |
248 | * Called by the Econet hardware driver when a packet transmit | |
249 | * has completed. Tell the user. | |
250 | */ | |
251 | ||
252 | static void ec_tx_done(struct sk_buff *skb, int result) | |
253 | { | |
254 | struct ec_cb *eb = (struct ec_cb *)&skb->cb; | |
255 | tx_result(skb->sk, eb->cookie, result); | |
256 | } | |
257 | #endif | |
258 | ||
259 | /* | |
260 | * Send a packet. We have to work out which device it's going out on | |
261 | * and hence whether to use real Econet or the UDP emulation. | |
262 | */ | |
263 | ||
264 | static int econet_sendmsg(struct kiocb *iocb, struct socket *sock, | |
265 | struct msghdr *msg, size_t len) | |
266 | { | |
267 | struct sock *sk = sock->sk; | |
268 | struct sockaddr_ec *saddr=(struct sockaddr_ec *)msg->msg_name; | |
269 | struct net_device *dev; | |
270 | struct ec_addr addr; | |
271 | int err; | |
272 | unsigned char port, cb; | |
273 | #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE) | |
274 | struct sk_buff *skb; | |
275 | struct ec_cb *eb; | |
276 | #endif | |
277 | #ifdef CONFIG_ECONET_AUNUDP | |
278 | struct msghdr udpmsg; | |
279 | struct iovec iov[msg->msg_iovlen+1]; | |
280 | struct aunhdr ah; | |
281 | struct sockaddr_in udpdest; | |
282 | __kernel_size_t size; | |
283 | int i; | |
284 | mm_segment_t oldfs; | |
285 | #endif | |
c9b6aab9 | 286 | |
1da177e4 | 287 | /* |
c9b6aab9 | 288 | * Check the flags. |
1da177e4 LT |
289 | */ |
290 | ||
c9b6aab9 | 291 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT)) |
1da177e4 LT |
292 | return -EINVAL; |
293 | ||
294 | /* | |
c9b6aab9 | 295 | * Get and verify the address. |
1da177e4 | 296 | */ |
c9b6aab9 | 297 | |
1d181831 DM |
298 | mutex_lock(&econet_mutex); |
299 | ||
fa0e8464 PB |
300 | if (saddr == NULL || msg->msg_namelen < sizeof(struct sockaddr_ec)) { |
301 | mutex_unlock(&econet_mutex); | |
302 | return -EINVAL; | |
303 | } | |
304 | addr.station = saddr->addr.station; | |
305 | addr.net = saddr->addr.net; | |
306 | port = saddr->port; | |
307 | cb = saddr->cb; | |
1da177e4 LT |
308 | |
309 | /* Look for a device with the right network number. */ | |
310 | dev = net2dev_map[addr.net]; | |
311 | ||
312 | /* If not directly reachable, use some default */ | |
1d181831 | 313 | if (dev == NULL) { |
1da177e4 LT |
314 | dev = net2dev_map[0]; |
315 | /* No interfaces at all? */ | |
1d181831 DM |
316 | if (dev == NULL) { |
317 | mutex_unlock(&econet_mutex); | |
1da177e4 | 318 | return -ENETDOWN; |
1d181831 | 319 | } |
1da177e4 LT |
320 | } |
321 | ||
1d181831 DM |
322 | if (len + 15 > dev->mtu) { |
323 | mutex_unlock(&econet_mutex); | |
1da177e4 | 324 | return -EMSGSIZE; |
1d181831 | 325 | } |
1da177e4 | 326 | |
1d181831 | 327 | if (dev->type == ARPHRD_ECONET) { |
1da177e4 LT |
328 | /* Real hardware Econet. We're not worthy etc. */ |
329 | #ifdef CONFIG_ECONET_NATIVE | |
330 | unsigned short proto = 0; | |
0c4e8581 | 331 | int res; |
1da177e4 LT |
332 | |
333 | dev_hold(dev); | |
c9b6aab9 | 334 | |
f5184d26 | 335 | skb = sock_alloc_send_skb(sk, len+LL_ALLOCATED_SPACE(dev), |
1da177e4 LT |
336 | msg->msg_flags & MSG_DONTWAIT, &err); |
337 | if (skb==NULL) | |
338 | goto out_unlock; | |
c9b6aab9 | 339 | |
1da177e4 | 340 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); |
c1d2bbe1 | 341 | skb_reset_network_header(skb); |
c9b6aab9 | 342 | |
1da177e4 | 343 | eb = (struct ec_cb *)&skb->cb; |
c9b6aab9 | 344 | |
1da177e4 LT |
345 | eb->cookie = saddr->cookie; |
346 | eb->sec = *saddr; | |
347 | eb->sent = ec_tx_done; | |
348 | ||
0c4e8581 SH |
349 | err = -EINVAL; |
350 | res = dev_hard_header(skb, dev, ntohs(proto), &addr, NULL, len); | |
351 | if (res < 0) | |
352 | goto out_free; | |
353 | if (res > 0) { | |
1da177e4 | 354 | struct ec_framehdr *fh; |
1da177e4 LT |
355 | /* Poke in our control byte and |
356 | port number. Hack, hack. */ | |
357 | fh = (struct ec_framehdr *)(skb->data); | |
358 | fh->cb = cb; | |
359 | fh->port = port; | |
360 | if (sock->type != SOCK_DGRAM) { | |
27a884dc | 361 | skb_reset_tail_pointer(skb); |
1da177e4 | 362 | skb->len = 0; |
0c4e8581 | 363 | } |
1da177e4 | 364 | } |
c9b6aab9 | 365 | |
1da177e4 LT |
366 | /* Copy the data. Returns -EFAULT on error */ |
367 | err = memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len); | |
368 | skb->protocol = proto; | |
369 | skb->dev = dev; | |
370 | skb->priority = sk->sk_priority; | |
371 | if (err) | |
372 | goto out_free; | |
c9b6aab9 | 373 | |
1da177e4 LT |
374 | err = -ENETDOWN; |
375 | if (!(dev->flags & IFF_UP)) | |
376 | goto out_free; | |
c9b6aab9 | 377 | |
1da177e4 LT |
378 | /* |
379 | * Now send it | |
380 | */ | |
c9b6aab9 | 381 | |
1da177e4 LT |
382 | dev_queue_xmit(skb); |
383 | dev_put(dev); | |
1d181831 | 384 | mutex_unlock(&econet_mutex); |
a02cec21 | 385 | return len; |
1da177e4 LT |
386 | |
387 | out_free: | |
388 | kfree_skb(skb); | |
389 | out_unlock: | |
390 | if (dev) | |
391 | dev_put(dev); | |
392 | #else | |
393 | err = -EPROTOTYPE; | |
394 | #endif | |
1d181831 DM |
395 | mutex_unlock(&econet_mutex); |
396 | ||
1da177e4 LT |
397 | return err; |
398 | } | |
399 | ||
400 | #ifdef CONFIG_ECONET_AUNUDP | |
401 | /* AUN virtual Econet. */ | |
402 | ||
1d181831 DM |
403 | if (udpsock == NULL) { |
404 | mutex_unlock(&econet_mutex); | |
1da177e4 | 405 | return -ENETDOWN; /* No socket - can't send */ |
1d181831 | 406 | } |
c9b6aab9 | 407 | |
1da177e4 LT |
408 | /* Make up a UDP datagram and hand it off to some higher intellect. */ |
409 | ||
410 | memset(&udpdest, 0, sizeof(udpdest)); | |
411 | udpdest.sin_family = AF_INET; | |
412 | udpdest.sin_port = htons(AUN_PORT); | |
413 | ||
414 | /* At the moment we use the stupid Acorn scheme of Econet address | |
415 | y.x maps to IP a.b.c.x. This should be replaced with something | |
416 | more flexible and more aware of subnet masks. */ | |
417 | { | |
418 | struct in_device *idev; | |
419 | unsigned long network = 0; | |
420 | ||
421 | rcu_read_lock(); | |
e5ed6399 | 422 | idev = __in_dev_get_rcu(dev); |
1da177e4 LT |
423 | if (idev) { |
424 | if (idev->ifa_list) | |
c9b6aab9 | 425 | network = ntohl(idev->ifa_list->ifa_address) & |
1da177e4 LT |
426 | 0xffffff00; /* !!! */ |
427 | } | |
428 | rcu_read_unlock(); | |
429 | udpdest.sin_addr.s_addr = htonl(network | addr.station); | |
430 | } | |
431 | ||
432 | ah.port = port; | |
433 | ah.cb = cb & 0x7f; | |
434 | ah.code = 2; /* magic */ | |
435 | ah.pad = 0; | |
436 | ||
437 | /* tack our header on the front of the iovec */ | |
438 | size = sizeof(struct aunhdr); | |
439 | /* | |
440 | * XXX: that is b0rken. We can't mix userland and kernel pointers | |
441 | * in iovec, since on a lot of platforms copy_from_user() will | |
442 | * *not* work with the kernel and userland ones at the same time, | |
443 | * regardless of what we do with set_fs(). And we are talking about | |
444 | * econet-over-ethernet here, so "it's only ARM anyway" doesn't | |
445 | * apply. Any suggestions on fixing that code? -- AV | |
446 | */ | |
447 | iov[0].iov_base = (void *)&ah; | |
448 | iov[0].iov_len = size; | |
449 | for (i = 0; i < msg->msg_iovlen; i++) { | |
450 | void __user *base = msg->msg_iov[i].iov_base; | |
9e834297 | 451 | size_t iov_len = msg->msg_iov[i].iov_len; |
1da177e4 | 452 | /* Check it now since we switch to KERNEL_DS later. */ |
9e834297 | 453 | if (!access_ok(VERIFY_READ, base, iov_len)) { |
1d181831 | 454 | mutex_unlock(&econet_mutex); |
1da177e4 | 455 | return -EFAULT; |
1d181831 | 456 | } |
1da177e4 | 457 | iov[i+1].iov_base = base; |
9e834297 HPP |
458 | iov[i+1].iov_len = iov_len; |
459 | size += iov_len; | |
1da177e4 LT |
460 | } |
461 | ||
462 | /* Get a skbuff (no data, just holds our cb information) */ | |
c9b6aab9 | 463 | if ((skb = sock_alloc_send_skb(sk, 0, |
1d181831 DM |
464 | msg->msg_flags & MSG_DONTWAIT, |
465 | &err)) == NULL) { | |
466 | mutex_unlock(&econet_mutex); | |
1da177e4 | 467 | return err; |
1d181831 | 468 | } |
1da177e4 LT |
469 | |
470 | eb = (struct ec_cb *)&skb->cb; | |
471 | ||
472 | eb->cookie = saddr->cookie; | |
473 | eb->timeout = (5*HZ); | |
474 | eb->start = jiffies; | |
475 | ah.handle = aun_seq; | |
476 | eb->seq = (aun_seq++); | |
477 | eb->sec = *saddr; | |
478 | ||
479 | skb_queue_tail(&aun_queue, skb); | |
480 | ||
481 | udpmsg.msg_name = (void *)&udpdest; | |
482 | udpmsg.msg_namelen = sizeof(udpdest); | |
483 | udpmsg.msg_iov = &iov[0]; | |
484 | udpmsg.msg_iovlen = msg->msg_iovlen + 1; | |
485 | udpmsg.msg_control = NULL; | |
486 | udpmsg.msg_controllen = 0; | |
487 | udpmsg.msg_flags=0; | |
488 | ||
489 | oldfs = get_fs(); set_fs(KERNEL_DS); /* More privs :-) */ | |
490 | err = sock_sendmsg(udpsock, &udpmsg, size); | |
491 | set_fs(oldfs); | |
492 | #else | |
493 | err = -EPROTOTYPE; | |
494 | #endif | |
1d181831 DM |
495 | mutex_unlock(&econet_mutex); |
496 | ||
1da177e4 LT |
497 | return err; |
498 | } | |
499 | ||
500 | /* | |
501 | * Look up the address of a socket. | |
502 | */ | |
503 | ||
504 | static int econet_getname(struct socket *sock, struct sockaddr *uaddr, | |
505 | int *uaddr_len, int peer) | |
506 | { | |
1d181831 DM |
507 | struct sock *sk; |
508 | struct econet_sock *eo; | |
1da177e4 LT |
509 | struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr; |
510 | ||
511 | if (peer) | |
512 | return -EOPNOTSUPP; | |
513 | ||
80922bbb | 514 | memset(sec, 0, sizeof(*sec)); |
1d181831 DM |
515 | mutex_lock(&econet_mutex); |
516 | ||
517 | sk = sock->sk; | |
518 | eo = ec_sk(sk); | |
519 | ||
1da177e4 LT |
520 | sec->sec_family = AF_ECONET; |
521 | sec->port = eo->port; | |
522 | sec->addr.station = eo->station; | |
523 | sec->addr.net = eo->net; | |
524 | ||
1d181831 DM |
525 | mutex_unlock(&econet_mutex); |
526 | ||
1da177e4 LT |
527 | *uaddr_len = sizeof(*sec); |
528 | return 0; | |
529 | } | |
530 | ||
531 | static void econet_destroy_timer(unsigned long data) | |
532 | { | |
533 | struct sock *sk=(struct sock *)data; | |
534 | ||
c564039f | 535 | if (!sk_has_allocations(sk)) { |
1da177e4 LT |
536 | sk_free(sk); |
537 | return; | |
538 | } | |
539 | ||
540 | sk->sk_timer.expires = jiffies + 10 * HZ; | |
541 | add_timer(&sk->sk_timer); | |
542 | printk(KERN_DEBUG "econet socket destroy delayed\n"); | |
543 | } | |
544 | ||
545 | /* | |
546 | * Close an econet socket. | |
547 | */ | |
548 | ||
549 | static int econet_release(struct socket *sock) | |
550 | { | |
1d181831 | 551 | struct sock *sk; |
1da177e4 | 552 | |
1d181831 DM |
553 | mutex_lock(&econet_mutex); |
554 | ||
555 | sk = sock->sk; | |
1da177e4 | 556 | if (!sk) |
1d181831 | 557 | goto out_unlock; |
1da177e4 LT |
558 | |
559 | econet_remove_socket(&econet_sklist, sk); | |
560 | ||
561 | /* | |
562 | * Now the socket is dead. No more input will appear. | |
563 | */ | |
564 | ||
565 | sk->sk_state_change(sk); /* It is useless. Just for sanity. */ | |
566 | ||
0efffaf9 | 567 | sock_orphan(sk); |
1da177e4 LT |
568 | |
569 | /* Purge queues */ | |
570 | ||
571 | skb_queue_purge(&sk->sk_receive_queue); | |
572 | ||
c564039f | 573 | if (sk_has_allocations(sk)) { |
1da177e4 LT |
574 | sk->sk_timer.data = (unsigned long)sk; |
575 | sk->sk_timer.expires = jiffies + HZ; | |
576 | sk->sk_timer.function = econet_destroy_timer; | |
577 | add_timer(&sk->sk_timer); | |
1d181831 DM |
578 | |
579 | goto out_unlock; | |
1da177e4 LT |
580 | } |
581 | ||
582 | sk_free(sk); | |
1d181831 DM |
583 | |
584 | out_unlock: | |
585 | mutex_unlock(&econet_mutex); | |
1da177e4 LT |
586 | return 0; |
587 | } | |
588 | ||
589 | static struct proto econet_proto = { | |
590 | .name = "ECONET", | |
591 | .owner = THIS_MODULE, | |
592 | .obj_size = sizeof(struct econet_sock), | |
593 | }; | |
594 | ||
595 | /* | |
596 | * Create an Econet socket | |
597 | */ | |
598 | ||
3f378b68 EP |
599 | static int econet_create(struct net *net, struct socket *sock, int protocol, |
600 | int kern) | |
1da177e4 LT |
601 | { |
602 | struct sock *sk; | |
603 | struct econet_sock *eo; | |
604 | int err; | |
605 | ||
09ad9bc7 | 606 | if (!net_eq(net, &init_net)) |
1b8d7ae4 EB |
607 | return -EAFNOSUPPORT; |
608 | ||
1da177e4 LT |
609 | /* Econet only provides datagram services. */ |
610 | if (sock->type != SOCK_DGRAM) | |
611 | return -ESOCKTNOSUPPORT; | |
612 | ||
613 | sock->state = SS_UNCONNECTED; | |
614 | ||
615 | err = -ENOBUFS; | |
6257ff21 | 616 | sk = sk_alloc(net, PF_ECONET, GFP_KERNEL, &econet_proto); |
1da177e4 LT |
617 | if (sk == NULL) |
618 | goto out; | |
619 | ||
620 | sk->sk_reuse = 1; | |
621 | sock->ops = &econet_ops; | |
622 | sock_init_data(sock, sk); | |
623 | ||
624 | eo = ec_sk(sk); | |
625 | sock_reset_flag(sk, SOCK_ZAPPED); | |
626 | sk->sk_family = PF_ECONET; | |
627 | eo->num = protocol; | |
628 | ||
629 | econet_insert_socket(&econet_sklist, sk); | |
a02cec21 | 630 | return 0; |
1da177e4 LT |
631 | out: |
632 | return err; | |
633 | } | |
634 | ||
635 | /* | |
636 | * Handle Econet specific ioctls | |
637 | */ | |
638 | ||
639 | static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg) | |
640 | { | |
641 | struct ifreq ifr; | |
642 | struct ec_device *edev; | |
643 | struct net_device *dev; | |
644 | struct sockaddr_ec *sec; | |
1d181831 | 645 | int err; |
1da177e4 LT |
646 | |
647 | /* | |
648 | * Fetch the caller's info block into kernel space | |
649 | */ | |
650 | ||
651 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) | |
652 | return -EFAULT; | |
653 | ||
881d966b | 654 | if ((dev = dev_get_by_name(&init_net, ifr.ifr_name)) == NULL) |
1da177e4 LT |
655 | return -ENODEV; |
656 | ||
657 | sec = (struct sockaddr_ec *)&ifr.ifr_addr; | |
658 | ||
1d181831 DM |
659 | mutex_lock(&econet_mutex); |
660 | ||
661 | err = 0; | |
662 | switch (cmd) { | |
1da177e4 LT |
663 | case SIOCSIFADDR: |
664 | edev = dev->ec_ptr; | |
1d181831 | 665 | if (edev == NULL) { |
1da177e4 | 666 | /* Magic up a new one. */ |
0da974f4 | 667 | edev = kzalloc(sizeof(struct ec_device), GFP_KERNEL); |
1da177e4 | 668 | if (edev == NULL) { |
1d181831 DM |
669 | err = -ENOMEM; |
670 | break; | |
1da177e4 | 671 | } |
1da177e4 | 672 | dev->ec_ptr = edev; |
1d181831 | 673 | } else |
1da177e4 LT |
674 | net2dev_map[edev->net] = NULL; |
675 | edev->station = sec->addr.station; | |
676 | edev->net = sec->addr.net; | |
677 | net2dev_map[sec->addr.net] = dev; | |
678 | if (!net2dev_map[0]) | |
679 | net2dev_map[0] = dev; | |
1d181831 | 680 | break; |
1da177e4 LT |
681 | |
682 | case SIOCGIFADDR: | |
683 | edev = dev->ec_ptr; | |
1d181831 DM |
684 | if (edev == NULL) { |
685 | err = -ENODEV; | |
686 | break; | |
1da177e4 LT |
687 | } |
688 | memset(sec, 0, sizeof(struct sockaddr_ec)); | |
689 | sec->addr.station = edev->station; | |
690 | sec->addr.net = edev->net; | |
691 | sec->sec_family = AF_ECONET; | |
692 | dev_put(dev); | |
693 | if (copy_to_user(arg, &ifr, sizeof(struct ifreq))) | |
1d181831 DM |
694 | err = -EFAULT; |
695 | break; | |
696 | ||
697 | default: | |
698 | err = -EINVAL; | |
699 | break; | |
1da177e4 LT |
700 | } |
701 | ||
1d181831 DM |
702 | mutex_unlock(&econet_mutex); |
703 | ||
1da177e4 | 704 | dev_put(dev); |
1d181831 DM |
705 | |
706 | return err; | |
1da177e4 LT |
707 | } |
708 | ||
709 | /* | |
710 | * Handle generic ioctls | |
711 | */ | |
712 | ||
713 | static int econet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
714 | { | |
715 | struct sock *sk = sock->sk; | |
716 | void __user *argp = (void __user *)arg; | |
717 | ||
718 | switch(cmd) { | |
719 | case SIOCGSTAMP: | |
720 | return sock_get_timestamp(sk, argp); | |
721 | ||
ae40eb1e ED |
722 | case SIOCGSTAMPNS: |
723 | return sock_get_timestampns(sk, argp); | |
724 | ||
1da177e4 LT |
725 | case SIOCSIFADDR: |
726 | case SIOCGIFADDR: | |
727 | return ec_dev_ioctl(sock, cmd, argp); | |
728 | break; | |
729 | ||
730 | default: | |
b5e5fa5e | 731 | return -ENOIOCTLCMD; |
1da177e4 LT |
732 | } |
733 | /*NOTREACHED*/ | |
734 | return 0; | |
735 | } | |
736 | ||
ec1b4cf7 | 737 | static const struct net_proto_family econet_family_ops = { |
1da177e4 LT |
738 | .family = PF_ECONET, |
739 | .create = econet_create, | |
740 | .owner = THIS_MODULE, | |
741 | }; | |
742 | ||
1d181831 | 743 | static const struct proto_ops econet_ops = { |
1da177e4 LT |
744 | .family = PF_ECONET, |
745 | .owner = THIS_MODULE, | |
746 | .release = econet_release, | |
747 | .bind = econet_bind, | |
748 | .connect = sock_no_connect, | |
749 | .socketpair = sock_no_socketpair, | |
750 | .accept = sock_no_accept, | |
c9b6aab9 | 751 | .getname = econet_getname, |
1da177e4 LT |
752 | .poll = datagram_poll, |
753 | .ioctl = econet_ioctl, | |
754 | .listen = sock_no_listen, | |
755 | .shutdown = sock_no_shutdown, | |
756 | .setsockopt = sock_no_setsockopt, | |
757 | .getsockopt = sock_no_getsockopt, | |
758 | .sendmsg = econet_sendmsg, | |
759 | .recvmsg = econet_recvmsg, | |
760 | .mmap = sock_no_mmap, | |
761 | .sendpage = sock_no_sendpage, | |
762 | }; | |
763 | ||
1da177e4 LT |
764 | #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE) |
765 | /* | |
766 | * Find the listening socket, if any, for the given data. | |
767 | */ | |
768 | ||
769 | static struct sock *ec_listening_socket(unsigned char port, unsigned char | |
770 | station, unsigned char net) | |
771 | { | |
772 | struct sock *sk; | |
773 | struct hlist_node *node; | |
774 | ||
0c78a92f | 775 | spin_lock(&econet_lock); |
1da177e4 LT |
776 | sk_for_each(sk, node, &econet_sklist) { |
777 | struct econet_sock *opt = ec_sk(sk); | |
c9b6aab9 | 778 | if ((opt->port == port || opt->port == 0) && |
1da177e4 | 779 | (opt->station == station || opt->station == 0) && |
0c78a92f ED |
780 | (opt->net == net || opt->net == 0)) { |
781 | sock_hold(sk); | |
1da177e4 | 782 | goto found; |
0c78a92f | 783 | } |
1da177e4 LT |
784 | } |
785 | sk = NULL; | |
786 | found: | |
0c78a92f | 787 | spin_unlock(&econet_lock); |
1da177e4 LT |
788 | return sk; |
789 | } | |
790 | ||
791 | /* | |
792 | * Queue a received packet for a socket. | |
793 | */ | |
794 | ||
795 | static int ec_queue_packet(struct sock *sk, struct sk_buff *skb, | |
796 | unsigned char stn, unsigned char net, | |
797 | unsigned char cb, unsigned char port) | |
798 | { | |
799 | struct ec_cb *eb = (struct ec_cb *)&skb->cb; | |
800 | struct sockaddr_ec *sec = (struct sockaddr_ec *)&eb->sec; | |
801 | ||
802 | memset(sec, 0, sizeof(struct sockaddr_ec)); | |
803 | sec->sec_family = AF_ECONET; | |
804 | sec->type = ECTYPE_PACKET_RECEIVED; | |
805 | sec->port = port; | |
806 | sec->cb = cb; | |
807 | sec->addr.net = net; | |
808 | sec->addr.station = stn; | |
809 | ||
810 | return sock_queue_rcv_skb(sk, skb); | |
811 | } | |
812 | #endif | |
813 | ||
814 | #ifdef CONFIG_ECONET_AUNUDP | |
815 | /* | |
c9b6aab9 | 816 | * Send an AUN protocol response. |
1da177e4 LT |
817 | */ |
818 | ||
819 | static void aun_send_response(__u32 addr, unsigned long seq, int code, int cb) | |
820 | { | |
821 | struct sockaddr_in sin = { | |
822 | .sin_family = AF_INET, | |
823 | .sin_port = htons(AUN_PORT), | |
824 | .sin_addr = {.s_addr = addr} | |
825 | }; | |
826 | struct aunhdr ah = {.code = code, .cb = cb, .handle = seq}; | |
827 | struct kvec iov = {.iov_base = (void *)&ah, .iov_len = sizeof(ah)}; | |
828 | struct msghdr udpmsg; | |
c9b6aab9 | 829 | |
1da177e4 LT |
830 | udpmsg.msg_name = (void *)&sin; |
831 | udpmsg.msg_namelen = sizeof(sin); | |
832 | udpmsg.msg_control = NULL; | |
833 | udpmsg.msg_controllen = 0; | |
834 | udpmsg.msg_flags=0; | |
835 | ||
836 | kernel_sendmsg(udpsock, &udpmsg, &iov, 1, sizeof(ah)); | |
837 | } | |
838 | ||
839 | ||
840 | /* | |
841 | * Handle incoming AUN packets. Work out if anybody wants them, | |
842 | * and send positive or negative acknowledgements as appropriate. | |
843 | */ | |
844 | ||
845 | static void aun_incoming(struct sk_buff *skb, struct aunhdr *ah, size_t len) | |
846 | { | |
eddc9ec5 | 847 | struct iphdr *ip = ip_hdr(skb); |
1da177e4 | 848 | unsigned char stn = ntohl(ip->saddr) & 0xff; |
0c78a92f | 849 | struct sock *sk = NULL; |
1da177e4 LT |
850 | struct sk_buff *newskb; |
851 | struct ec_device *edev = skb->dev->ec_ptr; | |
852 | ||
853 | if (! edev) | |
854 | goto bad; | |
855 | ||
856 | if ((sk = ec_listening_socket(ah->port, stn, edev->net)) == NULL) | |
857 | goto bad; /* Nobody wants it */ | |
858 | ||
c9b6aab9 | 859 | newskb = alloc_skb((len - sizeof(struct aunhdr) + 15) & ~15, |
1da177e4 LT |
860 | GFP_ATOMIC); |
861 | if (newskb == NULL) | |
862 | { | |
863 | printk(KERN_DEBUG "AUN: memory squeeze, dropping packet.\n"); | |
864 | /* Send nack and hope sender tries again */ | |
865 | goto bad; | |
866 | } | |
867 | ||
c9b6aab9 | 868 | memcpy(skb_put(newskb, len - sizeof(struct aunhdr)), (void *)(ah+1), |
1da177e4 LT |
869 | len - sizeof(struct aunhdr)); |
870 | ||
871 | if (ec_queue_packet(sk, newskb, stn, edev->net, ah->cb, ah->port)) | |
872 | { | |
873 | /* Socket is bankrupt. */ | |
874 | kfree_skb(newskb); | |
875 | goto bad; | |
876 | } | |
877 | ||
878 | aun_send_response(ip->saddr, ah->handle, 3, 0); | |
0c78a92f | 879 | sock_put(sk); |
1da177e4 LT |
880 | return; |
881 | ||
882 | bad: | |
883 | aun_send_response(ip->saddr, ah->handle, 4, 0); | |
0c78a92f ED |
884 | if (sk) |
885 | sock_put(sk); | |
1da177e4 LT |
886 | } |
887 | ||
888 | /* | |
889 | * Handle incoming AUN transmit acknowledgements. If the sequence | |
890 | * number matches something in our backlog then kill it and tell | |
891 | * the user. If the remote took too long to reply then we may have | |
892 | * dropped the packet already. | |
893 | */ | |
894 | ||
895 | static void aun_tx_ack(unsigned long seq, int result) | |
896 | { | |
897 | struct sk_buff *skb; | |
898 | unsigned long flags; | |
899 | struct ec_cb *eb; | |
900 | ||
901 | spin_lock_irqsave(&aun_queue_lock, flags); | |
de103342 | 902 | skb_queue_walk(&aun_queue, skb) { |
1da177e4 LT |
903 | eb = (struct ec_cb *)&skb->cb; |
904 | if (eb->seq == seq) | |
905 | goto foundit; | |
1da177e4 LT |
906 | } |
907 | spin_unlock_irqrestore(&aun_queue_lock, flags); | |
908 | printk(KERN_DEBUG "AUN: unknown sequence %ld\n", seq); | |
909 | return; | |
910 | ||
911 | foundit: | |
912 | tx_result(skb->sk, eb->cookie, result); | |
8728b834 | 913 | skb_unlink(skb, &aun_queue); |
1da177e4 LT |
914 | spin_unlock_irqrestore(&aun_queue_lock, flags); |
915 | kfree_skb(skb); | |
916 | } | |
917 | ||
918 | /* | |
919 | * Deal with received AUN frames - sort out what type of thing it is | |
920 | * and hand it to the right function. | |
921 | */ | |
922 | ||
923 | static void aun_data_available(struct sock *sk, int slen) | |
924 | { | |
925 | int err; | |
926 | struct sk_buff *skb; | |
927 | unsigned char *data; | |
928 | struct aunhdr *ah; | |
929 | struct iphdr *ip; | |
930 | size_t len; | |
931 | ||
932 | while ((skb = skb_recv_datagram(sk, 0, 1, &err)) == NULL) { | |
933 | if (err == -EAGAIN) { | |
934 | printk(KERN_ERR "AUN: no data available?!"); | |
935 | return; | |
936 | } | |
937 | printk(KERN_DEBUG "AUN: recvfrom() error %d\n", -err); | |
938 | } | |
939 | ||
9c70220b | 940 | data = skb_transport_header(skb) + sizeof(struct udphdr); |
1da177e4 LT |
941 | ah = (struct aunhdr *)data; |
942 | len = skb->len - sizeof(struct udphdr); | |
eddc9ec5 | 943 | ip = ip_hdr(skb); |
1da177e4 LT |
944 | |
945 | switch (ah->code) | |
946 | { | |
947 | case 2: | |
948 | aun_incoming(skb, ah, len); | |
949 | break; | |
950 | case 3: | |
951 | aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_OK); | |
952 | break; | |
953 | case 4: | |
954 | aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_NOT_LISTENING); | |
955 | break; | |
956 | #if 0 | |
957 | /* This isn't quite right yet. */ | |
958 | case 5: | |
959 | aun_send_response(ip->saddr, ah->handle, 6, ah->cb); | |
960 | break; | |
961 | #endif | |
962 | default: | |
963 | printk(KERN_DEBUG "unknown AUN packet (type %d)\n", data[0]); | |
964 | } | |
965 | ||
966 | skb_free_datagram(sk, skb); | |
967 | } | |
968 | ||
969 | /* | |
970 | * Called by the timer to manage the AUN transmit queue. If a packet | |
971 | * was sent to a dead or nonexistent host then we will never get an | |
972 | * acknowledgement back. After a few seconds we need to spot this and | |
973 | * drop the packet. | |
974 | */ | |
975 | ||
976 | static void ab_cleanup(unsigned long h) | |
977 | { | |
de103342 | 978 | struct sk_buff *skb, *n; |
1da177e4 LT |
979 | unsigned long flags; |
980 | ||
981 | spin_lock_irqsave(&aun_queue_lock, flags); | |
de103342 | 982 | skb_queue_walk_safe(&aun_queue, skb, n) { |
1da177e4 | 983 | struct ec_cb *eb = (struct ec_cb *)&skb->cb; |
de103342 | 984 | if ((jiffies - eb->start) > eb->timeout) { |
c9b6aab9 | 985 | tx_result(skb->sk, eb->cookie, |
1da177e4 | 986 | ECTYPE_TRANSMIT_NOT_PRESENT); |
8728b834 | 987 | skb_unlink(skb, &aun_queue); |
1da177e4 LT |
988 | kfree_skb(skb); |
989 | } | |
1da177e4 LT |
990 | } |
991 | spin_unlock_irqrestore(&aun_queue_lock, flags); | |
992 | ||
993 | mod_timer(&ab_cleanup_timer, jiffies + (HZ*2)); | |
994 | } | |
995 | ||
996 | static int __init aun_udp_initialise(void) | |
997 | { | |
998 | int error; | |
999 | struct sockaddr_in sin; | |
1000 | ||
1001 | skb_queue_head_init(&aun_queue); | |
b24b8a24 | 1002 | setup_timer(&ab_cleanup_timer, ab_cleanup, 0); |
1da177e4 | 1003 | ab_cleanup_timer.expires = jiffies + (HZ*2); |
1da177e4 LT |
1004 | add_timer(&ab_cleanup_timer); |
1005 | ||
1006 | memset(&sin, 0, sizeof(sin)); | |
1007 | sin.sin_port = htons(AUN_PORT); | |
1008 | ||
1009 | /* We can count ourselves lucky Acorn machines are too dim to | |
1010 | speak IPv6. :-) */ | |
1011 | if ((error = sock_create_kern(PF_INET, SOCK_DGRAM, 0, &udpsock)) < 0) | |
1012 | { | |
1013 | printk("AUN: socket error %d\n", -error); | |
1014 | return error; | |
1015 | } | |
c9b6aab9 | 1016 | |
1da177e4 LT |
1017 | udpsock->sk->sk_reuse = 1; |
1018 | udpsock->sk->sk_allocation = GFP_ATOMIC; /* we're going to call it | |
1019 | from interrupts */ | |
c9b6aab9 | 1020 | |
1da177e4 LT |
1021 | error = udpsock->ops->bind(udpsock, (struct sockaddr *)&sin, |
1022 | sizeof(sin)); | |
1023 | if (error < 0) | |
1024 | { | |
1025 | printk("AUN: bind error %d\n", -error); | |
1026 | goto release; | |
1027 | } | |
1028 | ||
1029 | udpsock->sk->sk_data_ready = aun_data_available; | |
1030 | ||
1031 | return 0; | |
1032 | ||
1033 | release: | |
1034 | sock_release(udpsock); | |
1035 | udpsock = NULL; | |
1036 | return error; | |
1037 | } | |
1038 | #endif | |
1039 | ||
1040 | #ifdef CONFIG_ECONET_NATIVE | |
1041 | ||
1042 | /* | |
1043 | * Receive an Econet frame from a device. | |
1044 | */ | |
1045 | ||
f2ccd8fa | 1046 | static int econet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) |
1da177e4 LT |
1047 | { |
1048 | struct ec_framehdr *hdr; | |
0c78a92f | 1049 | struct sock *sk = NULL; |
1da177e4 LT |
1050 | struct ec_device *edev = dev->ec_ptr; |
1051 | ||
721499e8 | 1052 | if (!net_eq(dev_net(dev), &init_net)) |
e730c155 EB |
1053 | goto drop; |
1054 | ||
1da177e4 LT |
1055 | if (skb->pkt_type == PACKET_OTHERHOST) |
1056 | goto drop; | |
1057 | ||
1058 | if (!edev) | |
1059 | goto drop; | |
1060 | ||
1061 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) | |
1062 | return NET_RX_DROP; | |
1063 | ||
1064 | if (!pskb_may_pull(skb, sizeof(struct ec_framehdr))) | |
1065 | goto drop; | |
1066 | ||
1067 | hdr = (struct ec_framehdr *) skb->data; | |
1068 | ||
1069 | /* First check for encapsulated IP */ | |
1070 | if (hdr->port == EC_PORT_IP) { | |
1071 | skb->protocol = htons(ETH_P_IP); | |
1072 | skb_pull(skb, sizeof(struct ec_framehdr)); | |
1073 | netif_rx(skb); | |
482d804c | 1074 | return NET_RX_SUCCESS; |
1da177e4 LT |
1075 | } |
1076 | ||
1077 | sk = ec_listening_socket(hdr->port, hdr->src_stn, hdr->src_net); | |
1078 | if (!sk) | |
1079 | goto drop; | |
1080 | ||
1081 | if (ec_queue_packet(sk, skb, edev->net, hdr->src_stn, hdr->cb, | |
1082 | hdr->port)) | |
1083 | goto drop; | |
0c78a92f | 1084 | sock_put(sk); |
482d804c | 1085 | return NET_RX_SUCCESS; |
1da177e4 LT |
1086 | |
1087 | drop: | |
0c78a92f ED |
1088 | if (sk) |
1089 | sock_put(sk); | |
1da177e4 LT |
1090 | kfree_skb(skb); |
1091 | return NET_RX_DROP; | |
1092 | } | |
1093 | ||
7546dd97 | 1094 | static struct packet_type econet_packet_type __read_mostly = { |
09640e63 | 1095 | .type = cpu_to_be16(ETH_P_ECONET), |
1da177e4 LT |
1096 | .func = econet_rcv, |
1097 | }; | |
1098 | ||
1099 | static void econet_hw_initialise(void) | |
1100 | { | |
1101 | dev_add_pack(&econet_packet_type); | |
1102 | } | |
1103 | ||
1104 | #endif | |
1105 | ||
1106 | static int econet_notifier(struct notifier_block *this, unsigned long msg, void *data) | |
1107 | { | |
1108 | struct net_device *dev = (struct net_device *)data; | |
1109 | struct ec_device *edev; | |
1110 | ||
721499e8 | 1111 | if (!net_eq(dev_net(dev), &init_net)) |
e9dc8653 EB |
1112 | return NOTIFY_DONE; |
1113 | ||
1da177e4 LT |
1114 | switch (msg) { |
1115 | case NETDEV_UNREGISTER: | |
1116 | /* A device has gone down - kill any data we hold for it. */ | |
1117 | edev = dev->ec_ptr; | |
1118 | if (edev) | |
1119 | { | |
1120 | if (net2dev_map[0] == dev) | |
1121 | net2dev_map[0] = NULL; | |
1122 | net2dev_map[edev->net] = NULL; | |
1123 | kfree(edev); | |
1124 | dev->ec_ptr = NULL; | |
1125 | } | |
1126 | break; | |
1127 | } | |
1128 | ||
1129 | return NOTIFY_DONE; | |
1130 | } | |
1131 | ||
1132 | static struct notifier_block econet_netdev_notifier = { | |
1133 | .notifier_call =econet_notifier, | |
1134 | }; | |
1135 | ||
1136 | static void __exit econet_proto_exit(void) | |
1137 | { | |
1138 | #ifdef CONFIG_ECONET_AUNUDP | |
1139 | del_timer(&ab_cleanup_timer); | |
1140 | if (udpsock) | |
1141 | sock_release(udpsock); | |
1142 | #endif | |
1143 | unregister_netdevice_notifier(&econet_netdev_notifier); | |
9c29a377 AD |
1144 | #ifdef CONFIG_ECONET_NATIVE |
1145 | dev_remove_pack(&econet_packet_type); | |
1146 | #endif | |
1da177e4 LT |
1147 | sock_unregister(econet_family_ops.family); |
1148 | proto_unregister(&econet_proto); | |
1149 | } | |
1150 | ||
1151 | static int __init econet_proto_init(void) | |
1152 | { | |
1153 | int err = proto_register(&econet_proto, 0); | |
1154 | ||
1155 | if (err != 0) | |
1156 | goto out; | |
1157 | sock_register(&econet_family_ops); | |
1158 | #ifdef CONFIG_ECONET_AUNUDP | |
1da177e4 LT |
1159 | aun_udp_initialise(); |
1160 | #endif | |
1161 | #ifdef CONFIG_ECONET_NATIVE | |
1162 | econet_hw_initialise(); | |
1163 | #endif | |
1164 | register_netdevice_notifier(&econet_netdev_notifier); | |
1165 | out: | |
1166 | return err; | |
1167 | } | |
1168 | ||
1169 | module_init(econet_proto_init); | |
1170 | module_exit(econet_proto_exit); | |
1171 | ||
1172 | MODULE_LICENSE("GPL"); | |
1173 | MODULE_ALIAS_NETPROTO(PF_ECONET); |