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 | ||
ee9c88f2 JP |
12 | #define pr_fmt(fmt) fmt |
13 | ||
1da177e4 LT |
14 | #include <linux/module.h> |
15 | ||
16 | #include <linux/types.h> | |
17 | #include <linux/kernel.h> | |
1da177e4 LT |
18 | #include <linux/string.h> |
19 | #include <linux/mm.h> | |
20 | #include <linux/socket.h> | |
21 | #include <linux/sockios.h> | |
22 | #include <linux/in.h> | |
23 | #include <linux/errno.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/if_ether.h> | |
26 | #include <linux/netdevice.h> | |
27 | #include <linux/inetdevice.h> | |
28 | #include <linux/route.h> | |
29 | #include <linux/inet.h> | |
30 | #include <linux/etherdevice.h> | |
31 | #include <linux/if_arp.h> | |
32 | #include <linux/wireless.h> | |
33 | #include <linux/skbuff.h> | |
14c85021 | 34 | #include <linux/udp.h> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
a27e13d3 | 36 | #include <linux/vmalloc.h> |
1da177e4 LT |
37 | #include <net/sock.h> |
38 | #include <net/inet_common.h> | |
39 | #include <linux/stat.h> | |
40 | #include <linux/init.h> | |
41 | #include <linux/if_ec.h> | |
42 | #include <net/udp.h> | |
43 | #include <net/ip.h> | |
44 | #include <linux/spinlock.h> | |
45 | #include <linux/rcupdate.h> | |
46 | #include <linux/bitops.h> | |
1d181831 | 47 | #include <linux/mutex.h> |
1da177e4 | 48 | |
ee9c88f2 | 49 | #include <linux/uaccess.h> |
1da177e4 LT |
50 | #include <asm/system.h> |
51 | ||
90ddc4f0 | 52 | static const struct proto_ops econet_ops; |
1da177e4 | 53 | static struct hlist_head econet_sklist; |
0c78a92f | 54 | static DEFINE_SPINLOCK(econet_lock); |
1d181831 | 55 | static DEFINE_MUTEX(econet_mutex); |
1da177e4 LT |
56 | |
57 | /* Since there are only 256 possible network numbers (or fewer, depends | |
58 | how you count) it makes sense to use a simple lookup table. */ | |
59 | static struct net_device *net2dev_map[256]; | |
60 | ||
61 | #define EC_PORT_IP 0xd2 | |
62 | ||
63 | #ifdef CONFIG_ECONET_AUNUDP | |
ca403302 | 64 | static DEFINE_SPINLOCK(aun_queue_lock); |
1da177e4 LT |
65 | static struct socket *udpsock; |
66 | #define AUN_PORT 0x8000 | |
67 | ||
ee9c88f2 | 68 | struct aunhdr { |
1da177e4 LT |
69 | unsigned char code; /* AUN magic protocol byte */ |
70 | unsigned char port; | |
71 | unsigned char cb; | |
72 | unsigned char pad; | |
73 | unsigned long handle; | |
74 | }; | |
75 | ||
76 | static unsigned long aun_seq; | |
77 | ||
78 | /* Queue of packets waiting to be transmitted. */ | |
79 | static struct sk_buff_head aun_queue; | |
80 | static struct timer_list ab_cleanup_timer; | |
81 | ||
82 | #endif /* CONFIG_ECONET_AUNUDP */ | |
83 | ||
84 | /* Per-packet information */ | |
ee9c88f2 | 85 | struct ec_cb { |
1da177e4 LT |
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 | ||
ee9c88f2 | 139 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); |
1da177e4 LT |
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 | ||
ee9c88f2 | 147 | if (skb == NULL) |
1da177e4 LT |
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; | |
ee9c88f2 JP |
156 | if (copied > len) { |
157 | copied = len; | |
158 | msg->msg_flags |= MSG_TRUNC; | |
1da177e4 LT |
159 | } |
160 | ||
161 | /* We can't use skb_copy_datagram here */ | |
162 | err = memcpy_toiovec(msg->msg_iov, skb->data, copied); | |
163 | if (err) | |
164 | goto out_free; | |
b7aa0bf7 | 165 | sk->sk_stamp = skb->tstamp; |
1da177e4 LT |
166 | |
167 | if (msg->msg_name) | |
168 | memcpy(msg->msg_name, skb->cb, msg->msg_namelen); | |
169 | ||
170 | /* | |
171 | * Free or return the buffer as appropriate. Again this | |
172 | * hides all the races and re-entrancy issues from us. | |
173 | */ | |
174 | err = copied; | |
175 | ||
176 | out_free: | |
177 | skb_free_datagram(sk, skb); | |
178 | out: | |
1d181831 | 179 | mutex_unlock(&econet_mutex); |
1da177e4 LT |
180 | return err; |
181 | } | |
182 | ||
183 | /* | |
184 | * Bind an Econet socket. | |
185 | */ | |
186 | ||
ee9c88f2 JP |
187 | static int econet_bind(struct socket *sock, struct sockaddr *uaddr, |
188 | int addr_len) | |
1da177e4 LT |
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 | ||
ee9c88f2 JP |
228 | if (skb == NULL) { |
229 | pr_debug("econet: memory squeeze, transmit result dropped\n"); | |
1da177e4 LT |
230 | return; |
231 | } | |
232 | ||
233 | eb = (struct ec_cb *)&skb->cb; | |
234 | sec = (struct sockaddr_ec *)&eb->sec; | |
235 | memset(sec, 0, sizeof(struct sockaddr_ec)); | |
236 | sec->cookie = cookie; | |
237 | sec->type = ECTYPE_TRANSMIT_STATUS | result; | |
238 | sec->sec_family = AF_ECONET; | |
239 | ||
240 | if (sock_queue_rcv_skb(sk, skb) < 0) | |
241 | kfree_skb(skb); | |
242 | } | |
243 | #endif | |
244 | ||
245 | #ifdef CONFIG_ECONET_NATIVE | |
246 | /* | |
247 | * Called by the Econet hardware driver when a packet transmit | |
248 | * has completed. Tell the user. | |
249 | */ | |
250 | ||
251 | static void ec_tx_done(struct sk_buff *skb, int result) | |
252 | { | |
253 | struct ec_cb *eb = (struct ec_cb *)&skb->cb; | |
254 | tx_result(skb->sk, eb->cookie, result); | |
255 | } | |
256 | #endif | |
257 | ||
258 | /* | |
259 | * Send a packet. We have to work out which device it's going out on | |
260 | * and hence whether to use real Econet or the UDP emulation. | |
261 | */ | |
262 | ||
263 | static int econet_sendmsg(struct kiocb *iocb, struct socket *sock, | |
264 | struct msghdr *msg, size_t len) | |
265 | { | |
ee9c88f2 | 266 | struct sockaddr_ec *saddr = (struct sockaddr_ec *)msg->msg_name; |
1da177e4 LT |
267 | struct net_device *dev; |
268 | struct ec_addr addr; | |
269 | int err; | |
270 | unsigned char port, cb; | |
271 | #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE) | |
389f2a18 | 272 | struct sock *sk = sock->sk; |
1da177e4 LT |
273 | struct sk_buff *skb; |
274 | struct ec_cb *eb; | |
275 | #endif | |
276 | #ifdef CONFIG_ECONET_AUNUDP | |
277 | struct msghdr udpmsg; | |
a27e13d3 | 278 | struct iovec iov[2]; |
1da177e4 LT |
279 | struct aunhdr ah; |
280 | struct sockaddr_in udpdest; | |
281 | __kernel_size_t size; | |
1da177e4 | 282 | mm_segment_t oldfs; |
a27e13d3 | 283 | char *userbuf; |
1da177e4 | 284 | #endif |
c9b6aab9 | 285 | |
1da177e4 | 286 | /* |
c9b6aab9 | 287 | * Check the flags. |
1da177e4 LT |
288 | */ |
289 | ||
c9b6aab9 | 290 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT)) |
1da177e4 LT |
291 | return -EINVAL; |
292 | ||
293 | /* | |
c9b6aab9 | 294 | * Get and verify the address. |
1da177e4 | 295 | */ |
c9b6aab9 | 296 | |
1d181831 DM |
297 | mutex_lock(&econet_mutex); |
298 | ||
ee9c88f2 JP |
299 | if (saddr == NULL || msg->msg_namelen < sizeof(struct sockaddr_ec)) { |
300 | mutex_unlock(&econet_mutex); | |
301 | return -EINVAL; | |
302 | } | |
303 | addr.station = saddr->addr.station; | |
304 | addr.net = saddr->addr.net; | |
305 | port = saddr->port; | |
306 | cb = saddr->cb; | |
1da177e4 LT |
307 | |
308 | /* Look for a device with the right network number. */ | |
309 | dev = net2dev_map[addr.net]; | |
310 | ||
311 | /* If not directly reachable, use some default */ | |
1d181831 | 312 | if (dev == NULL) { |
1da177e4 LT |
313 | dev = net2dev_map[0]; |
314 | /* No interfaces at all? */ | |
1d181831 DM |
315 | if (dev == NULL) { |
316 | mutex_unlock(&econet_mutex); | |
1da177e4 | 317 | return -ENETDOWN; |
1d181831 | 318 | } |
1da177e4 LT |
319 | } |
320 | ||
1d181831 | 321 | if (dev->type == ARPHRD_ECONET) { |
1da177e4 LT |
322 | /* Real hardware Econet. We're not worthy etc. */ |
323 | #ifdef CONFIG_ECONET_NATIVE | |
324 | unsigned short proto = 0; | |
0c4e8581 | 325 | int res; |
1da177e4 | 326 | |
a27e13d3 PB |
327 | if (len + 15 > dev->mtu) { |
328 | mutex_unlock(&econet_mutex); | |
329 | return -EMSGSIZE; | |
330 | } | |
331 | ||
1da177e4 | 332 | dev_hold(dev); |
c9b6aab9 | 333 | |
ee9c88f2 | 334 | skb = sock_alloc_send_skb(sk, len + LL_ALLOCATED_SPACE(dev), |
1da177e4 | 335 | msg->msg_flags & MSG_DONTWAIT, &err); |
ee9c88f2 | 336 | if (skb == NULL) |
1da177e4 | 337 | goto out_unlock; |
c9b6aab9 | 338 | |
1da177e4 | 339 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); |
c1d2bbe1 | 340 | skb_reset_network_header(skb); |
c9b6aab9 | 341 | |
1da177e4 | 342 | eb = (struct ec_cb *)&skb->cb; |
c9b6aab9 | 343 | |
1da177e4 LT |
344 | eb->cookie = saddr->cookie; |
345 | eb->sec = *saddr; | |
346 | eb->sent = ec_tx_done; | |
347 | ||
0c4e8581 SH |
348 | err = -EINVAL; |
349 | res = dev_hard_header(skb, dev, ntohs(proto), &addr, NULL, len); | |
350 | if (res < 0) | |
351 | goto out_free; | |
352 | if (res > 0) { | |
1da177e4 | 353 | struct ec_framehdr *fh; |
1da177e4 LT |
354 | /* Poke in our control byte and |
355 | port number. Hack, hack. */ | |
ee9c88f2 | 356 | fh = (struct ec_framehdr *)skb->data; |
1da177e4 LT |
357 | fh->cb = cb; |
358 | fh->port = port; | |
359 | if (sock->type != SOCK_DGRAM) { | |
27a884dc | 360 | skb_reset_tail_pointer(skb); |
1da177e4 | 361 | skb->len = 0; |
0c4e8581 | 362 | } |
1da177e4 | 363 | } |
c9b6aab9 | 364 | |
1da177e4 | 365 | /* Copy the data. Returns -EFAULT on error */ |
ee9c88f2 | 366 | err = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len); |
1da177e4 LT |
367 | skb->protocol = proto; |
368 | skb->dev = dev; | |
369 | skb->priority = sk->sk_priority; | |
370 | if (err) | |
371 | goto out_free; | |
c9b6aab9 | 372 | |
1da177e4 LT |
373 | err = -ENETDOWN; |
374 | if (!(dev->flags & IFF_UP)) | |
375 | goto out_free; | |
c9b6aab9 | 376 | |
1da177e4 LT |
377 | /* |
378 | * Now send it | |
379 | */ | |
c9b6aab9 | 380 | |
1da177e4 LT |
381 | dev_queue_xmit(skb); |
382 | dev_put(dev); | |
1d181831 | 383 | mutex_unlock(&econet_mutex); |
a02cec21 | 384 | return len; |
1da177e4 | 385 | |
ee9c88f2 | 386 | out_free: |
1da177e4 | 387 | kfree_skb(skb); |
ee9c88f2 | 388 | out_unlock: |
1da177e4 LT |
389 | if (dev) |
390 | dev_put(dev); | |
391 | #else | |
392 | err = -EPROTOTYPE; | |
393 | #endif | |
1d181831 DM |
394 | mutex_unlock(&econet_mutex); |
395 | ||
1da177e4 LT |
396 | return err; |
397 | } | |
398 | ||
399 | #ifdef CONFIG_ECONET_AUNUDP | |
400 | /* AUN virtual Econet. */ | |
401 | ||
1d181831 DM |
402 | if (udpsock == NULL) { |
403 | mutex_unlock(&econet_mutex); | |
1da177e4 | 404 | return -ENETDOWN; /* No socket - can't send */ |
1d181831 | 405 | } |
c9b6aab9 | 406 | |
a27e13d3 PB |
407 | if (len > 32768) { |
408 | err = -E2BIG; | |
409 | goto error; | |
410 | } | |
411 | ||
1da177e4 LT |
412 | /* Make up a UDP datagram and hand it off to some higher intellect. */ |
413 | ||
414 | memset(&udpdest, 0, sizeof(udpdest)); | |
415 | udpdest.sin_family = AF_INET; | |
416 | udpdest.sin_port = htons(AUN_PORT); | |
417 | ||
418 | /* At the moment we use the stupid Acorn scheme of Econet address | |
419 | y.x maps to IP a.b.c.x. This should be replaced with something | |
420 | more flexible and more aware of subnet masks. */ | |
421 | { | |
422 | struct in_device *idev; | |
423 | unsigned long network = 0; | |
424 | ||
425 | rcu_read_lock(); | |
e5ed6399 | 426 | idev = __in_dev_get_rcu(dev); |
1da177e4 LT |
427 | if (idev) { |
428 | if (idev->ifa_list) | |
c9b6aab9 | 429 | network = ntohl(idev->ifa_list->ifa_address) & |
1da177e4 LT |
430 | 0xffffff00; /* !!! */ |
431 | } | |
432 | rcu_read_unlock(); | |
433 | udpdest.sin_addr.s_addr = htonl(network | addr.station); | |
434 | } | |
435 | ||
67c5c6cb | 436 | memset(&ah, 0, sizeof(ah)); |
1da177e4 LT |
437 | ah.port = port; |
438 | ah.cb = cb & 0x7f; | |
439 | ah.code = 2; /* magic */ | |
1da177e4 LT |
440 | |
441 | /* tack our header on the front of the iovec */ | |
442 | size = sizeof(struct aunhdr); | |
1da177e4 LT |
443 | iov[0].iov_base = (void *)&ah; |
444 | iov[0].iov_len = size; | |
a27e13d3 PB |
445 | |
446 | userbuf = vmalloc(len); | |
447 | if (userbuf == NULL) { | |
448 | err = -ENOMEM; | |
449 | goto error; | |
1da177e4 LT |
450 | } |
451 | ||
a27e13d3 PB |
452 | iov[1].iov_base = userbuf; |
453 | iov[1].iov_len = len; | |
454 | err = memcpy_fromiovec(userbuf, msg->msg_iov, len); | |
455 | if (err) | |
456 | goto error_free_buf; | |
457 | ||
1da177e4 | 458 | /* Get a skbuff (no data, just holds our cb information) */ |
ee9c88f2 JP |
459 | skb = sock_alloc_send_skb(sk, 0, msg->msg_flags & MSG_DONTWAIT, &err); |
460 | if (skb == NULL) | |
a27e13d3 | 461 | goto error_free_buf; |
1da177e4 LT |
462 | |
463 | eb = (struct ec_cb *)&skb->cb; | |
464 | ||
465 | eb->cookie = saddr->cookie; | |
ee9c88f2 | 466 | eb->timeout = 5 * HZ; |
1da177e4 LT |
467 | eb->start = jiffies; |
468 | ah.handle = aun_seq; | |
469 | eb->seq = (aun_seq++); | |
470 | eb->sec = *saddr; | |
471 | ||
472 | skb_queue_tail(&aun_queue, skb); | |
473 | ||
474 | udpmsg.msg_name = (void *)&udpdest; | |
475 | udpmsg.msg_namelen = sizeof(udpdest); | |
476 | udpmsg.msg_iov = &iov[0]; | |
a27e13d3 | 477 | udpmsg.msg_iovlen = 2; |
1da177e4 LT |
478 | udpmsg.msg_control = NULL; |
479 | udpmsg.msg_controllen = 0; | |
ee9c88f2 | 480 | udpmsg.msg_flags = 0; |
1da177e4 | 481 | |
ee9c88f2 JP |
482 | oldfs = get_fs(); |
483 | set_fs(KERNEL_DS); /* More privs :-) */ | |
1da177e4 LT |
484 | err = sock_sendmsg(udpsock, &udpmsg, size); |
485 | set_fs(oldfs); | |
a27e13d3 PB |
486 | |
487 | error_free_buf: | |
488 | vfree(userbuf); | |
389f2a18 | 489 | error: |
1da177e4 LT |
490 | #else |
491 | err = -EPROTOTYPE; | |
492 | #endif | |
1d181831 DM |
493 | mutex_unlock(&econet_mutex); |
494 | ||
1da177e4 LT |
495 | return err; |
496 | } | |
497 | ||
498 | /* | |
499 | * Look up the address of a socket. | |
500 | */ | |
501 | ||
502 | static int econet_getname(struct socket *sock, struct sockaddr *uaddr, | |
503 | int *uaddr_len, int peer) | |
504 | { | |
1d181831 DM |
505 | struct sock *sk; |
506 | struct econet_sock *eo; | |
1da177e4 LT |
507 | struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr; |
508 | ||
509 | if (peer) | |
510 | return -EOPNOTSUPP; | |
511 | ||
80922bbb | 512 | memset(sec, 0, sizeof(*sec)); |
1d181831 DM |
513 | mutex_lock(&econet_mutex); |
514 | ||
515 | sk = sock->sk; | |
516 | eo = ec_sk(sk); | |
517 | ||
1da177e4 LT |
518 | sec->sec_family = AF_ECONET; |
519 | sec->port = eo->port; | |
520 | sec->addr.station = eo->station; | |
521 | sec->addr.net = eo->net; | |
522 | ||
1d181831 DM |
523 | mutex_unlock(&econet_mutex); |
524 | ||
1da177e4 LT |
525 | *uaddr_len = sizeof(*sec); |
526 | return 0; | |
527 | } | |
528 | ||
529 | static void econet_destroy_timer(unsigned long data) | |
530 | { | |
ee9c88f2 | 531 | struct sock *sk = (struct sock *)data; |
1da177e4 | 532 | |
c564039f | 533 | if (!sk_has_allocations(sk)) { |
1da177e4 LT |
534 | sk_free(sk); |
535 | return; | |
536 | } | |
537 | ||
538 | sk->sk_timer.expires = jiffies + 10 * HZ; | |
539 | add_timer(&sk->sk_timer); | |
ee9c88f2 | 540 | pr_debug("econet: socket destroy delayed\n"); |
1da177e4 LT |
541 | } |
542 | ||
543 | /* | |
544 | * Close an econet socket. | |
545 | */ | |
546 | ||
547 | static int econet_release(struct socket *sock) | |
548 | { | |
1d181831 | 549 | struct sock *sk; |
1da177e4 | 550 | |
1d181831 DM |
551 | mutex_lock(&econet_mutex); |
552 | ||
553 | sk = sock->sk; | |
1da177e4 | 554 | if (!sk) |
1d181831 | 555 | goto out_unlock; |
1da177e4 LT |
556 | |
557 | econet_remove_socket(&econet_sklist, sk); | |
558 | ||
559 | /* | |
560 | * Now the socket is dead. No more input will appear. | |
561 | */ | |
562 | ||
563 | sk->sk_state_change(sk); /* It is useless. Just for sanity. */ | |
564 | ||
0efffaf9 | 565 | sock_orphan(sk); |
1da177e4 LT |
566 | |
567 | /* Purge queues */ | |
568 | ||
569 | skb_queue_purge(&sk->sk_receive_queue); | |
570 | ||
c564039f | 571 | if (sk_has_allocations(sk)) { |
1da177e4 LT |
572 | sk->sk_timer.data = (unsigned long)sk; |
573 | sk->sk_timer.expires = jiffies + HZ; | |
574 | sk->sk_timer.function = econet_destroy_timer; | |
575 | add_timer(&sk->sk_timer); | |
1d181831 DM |
576 | |
577 | goto out_unlock; | |
1da177e4 LT |
578 | } |
579 | ||
580 | sk_free(sk); | |
1d181831 DM |
581 | |
582 | out_unlock: | |
583 | mutex_unlock(&econet_mutex); | |
1da177e4 LT |
584 | return 0; |
585 | } | |
586 | ||
587 | static struct proto econet_proto = { | |
588 | .name = "ECONET", | |
589 | .owner = THIS_MODULE, | |
590 | .obj_size = sizeof(struct econet_sock), | |
591 | }; | |
592 | ||
593 | /* | |
594 | * Create an Econet socket | |
595 | */ | |
596 | ||
3f378b68 EP |
597 | static int econet_create(struct net *net, struct socket *sock, int protocol, |
598 | int kern) | |
1da177e4 LT |
599 | { |
600 | struct sock *sk; | |
601 | struct econet_sock *eo; | |
602 | int err; | |
603 | ||
09ad9bc7 | 604 | if (!net_eq(net, &init_net)) |
1b8d7ae4 EB |
605 | return -EAFNOSUPPORT; |
606 | ||
1da177e4 LT |
607 | /* Econet only provides datagram services. */ |
608 | if (sock->type != SOCK_DGRAM) | |
609 | return -ESOCKTNOSUPPORT; | |
610 | ||
611 | sock->state = SS_UNCONNECTED; | |
612 | ||
613 | err = -ENOBUFS; | |
6257ff21 | 614 | sk = sk_alloc(net, PF_ECONET, GFP_KERNEL, &econet_proto); |
1da177e4 LT |
615 | if (sk == NULL) |
616 | goto out; | |
617 | ||
618 | sk->sk_reuse = 1; | |
619 | sock->ops = &econet_ops; | |
620 | sock_init_data(sock, sk); | |
621 | ||
622 | eo = ec_sk(sk); | |
623 | sock_reset_flag(sk, SOCK_ZAPPED); | |
624 | sk->sk_family = PF_ECONET; | |
625 | eo->num = protocol; | |
626 | ||
627 | econet_insert_socket(&econet_sklist, sk); | |
a02cec21 | 628 | return 0; |
1da177e4 LT |
629 | out: |
630 | return err; | |
631 | } | |
632 | ||
633 | /* | |
634 | * Handle Econet specific ioctls | |
635 | */ | |
636 | ||
637 | static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg) | |
638 | { | |
639 | struct ifreq ifr; | |
640 | struct ec_device *edev; | |
641 | struct net_device *dev; | |
642 | struct sockaddr_ec *sec; | |
1d181831 | 643 | int err; |
1da177e4 LT |
644 | |
645 | /* | |
646 | * Fetch the caller's info block into kernel space | |
647 | */ | |
648 | ||
649 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) | |
650 | return -EFAULT; | |
651 | ||
ee9c88f2 JP |
652 | dev = dev_get_by_name(&init_net, ifr.ifr_name); |
653 | if (dev == NULL) | |
1da177e4 LT |
654 | return -ENODEV; |
655 | ||
656 | sec = (struct sockaddr_ec *)&ifr.ifr_addr; | |
657 | ||
1d181831 DM |
658 | mutex_lock(&econet_mutex); |
659 | ||
660 | err = 0; | |
661 | switch (cmd) { | |
1da177e4 | 662 | case SIOCSIFADDR: |
0c62fc6d NE |
663 | if (!capable(CAP_NET_ADMIN)) { |
664 | err = -EPERM; | |
665 | break; | |
666 | } | |
16c41745 | 667 | |
1da177e4 | 668 | edev = dev->ec_ptr; |
1d181831 | 669 | if (edev == NULL) { |
1da177e4 | 670 | /* Magic up a new one. */ |
0da974f4 | 671 | edev = kzalloc(sizeof(struct ec_device), GFP_KERNEL); |
1da177e4 | 672 | if (edev == NULL) { |
1d181831 DM |
673 | err = -ENOMEM; |
674 | break; | |
1da177e4 | 675 | } |
1da177e4 | 676 | dev->ec_ptr = edev; |
1d181831 | 677 | } else |
1da177e4 LT |
678 | net2dev_map[edev->net] = NULL; |
679 | edev->station = sec->addr.station; | |
680 | edev->net = sec->addr.net; | |
681 | net2dev_map[sec->addr.net] = dev; | |
682 | if (!net2dev_map[0]) | |
683 | net2dev_map[0] = dev; | |
1d181831 | 684 | break; |
1da177e4 LT |
685 | |
686 | case SIOCGIFADDR: | |
687 | edev = dev->ec_ptr; | |
1d181831 DM |
688 | if (edev == NULL) { |
689 | err = -ENODEV; | |
690 | break; | |
1da177e4 LT |
691 | } |
692 | memset(sec, 0, sizeof(struct sockaddr_ec)); | |
693 | sec->addr.station = edev->station; | |
694 | sec->addr.net = edev->net; | |
695 | sec->sec_family = AF_ECONET; | |
696 | dev_put(dev); | |
697 | if (copy_to_user(arg, &ifr, sizeof(struct ifreq))) | |
1d181831 DM |
698 | err = -EFAULT; |
699 | break; | |
700 | ||
701 | default: | |
702 | err = -EINVAL; | |
703 | break; | |
1da177e4 LT |
704 | } |
705 | ||
1d181831 DM |
706 | mutex_unlock(&econet_mutex); |
707 | ||
1da177e4 | 708 | dev_put(dev); |
1d181831 DM |
709 | |
710 | return err; | |
1da177e4 LT |
711 | } |
712 | ||
713 | /* | |
714 | * Handle generic ioctls | |
715 | */ | |
716 | ||
ee9c88f2 JP |
717 | static int econet_ioctl(struct socket *sock, unsigned int cmd, |
718 | unsigned long arg) | |
1da177e4 LT |
719 | { |
720 | struct sock *sk = sock->sk; | |
721 | void __user *argp = (void __user *)arg; | |
722 | ||
075e1913 JP |
723 | switch (cmd) { |
724 | case SIOCGSTAMP: | |
725 | return sock_get_timestamp(sk, argp); | |
1da177e4 | 726 | |
075e1913 JP |
727 | case SIOCGSTAMPNS: |
728 | return sock_get_timestampns(sk, argp); | |
ae40eb1e | 729 | |
075e1913 JP |
730 | case SIOCSIFADDR: |
731 | case SIOCGIFADDR: | |
732 | return ec_dev_ioctl(sock, cmd, argp); | |
1da177e4 | 733 | |
1da177e4 | 734 | } |
075e1913 JP |
735 | |
736 | return -ENOIOCTLCMD; | |
1da177e4 LT |
737 | } |
738 | ||
ec1b4cf7 | 739 | static const struct net_proto_family econet_family_ops = { |
1da177e4 LT |
740 | .family = PF_ECONET, |
741 | .create = econet_create, | |
742 | .owner = THIS_MODULE, | |
743 | }; | |
744 | ||
1d181831 | 745 | static const struct proto_ops econet_ops = { |
1da177e4 LT |
746 | .family = PF_ECONET, |
747 | .owner = THIS_MODULE, | |
748 | .release = econet_release, | |
749 | .bind = econet_bind, | |
750 | .connect = sock_no_connect, | |
751 | .socketpair = sock_no_socketpair, | |
752 | .accept = sock_no_accept, | |
c9b6aab9 | 753 | .getname = econet_getname, |
1da177e4 LT |
754 | .poll = datagram_poll, |
755 | .ioctl = econet_ioctl, | |
756 | .listen = sock_no_listen, | |
757 | .shutdown = sock_no_shutdown, | |
758 | .setsockopt = sock_no_setsockopt, | |
759 | .getsockopt = sock_no_getsockopt, | |
760 | .sendmsg = econet_sendmsg, | |
761 | .recvmsg = econet_recvmsg, | |
762 | .mmap = sock_no_mmap, | |
763 | .sendpage = sock_no_sendpage, | |
764 | }; | |
765 | ||
1da177e4 LT |
766 | #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE) |
767 | /* | |
768 | * Find the listening socket, if any, for the given data. | |
769 | */ | |
770 | ||
771 | static struct sock *ec_listening_socket(unsigned char port, unsigned char | |
772 | station, unsigned char net) | |
773 | { | |
774 | struct sock *sk; | |
775 | struct hlist_node *node; | |
776 | ||
0c78a92f | 777 | spin_lock(&econet_lock); |
1da177e4 LT |
778 | sk_for_each(sk, node, &econet_sklist) { |
779 | struct econet_sock *opt = ec_sk(sk); | |
c9b6aab9 | 780 | if ((opt->port == port || opt->port == 0) && |
1da177e4 | 781 | (opt->station == station || opt->station == 0) && |
0c78a92f ED |
782 | (opt->net == net || opt->net == 0)) { |
783 | sock_hold(sk); | |
1da177e4 | 784 | goto found; |
0c78a92f | 785 | } |
1da177e4 LT |
786 | } |
787 | sk = NULL; | |
788 | found: | |
0c78a92f | 789 | spin_unlock(&econet_lock); |
1da177e4 LT |
790 | return sk; |
791 | } | |
792 | ||
793 | /* | |
794 | * Queue a received packet for a socket. | |
795 | */ | |
796 | ||
797 | static int ec_queue_packet(struct sock *sk, struct sk_buff *skb, | |
798 | unsigned char stn, unsigned char net, | |
799 | unsigned char cb, unsigned char port) | |
800 | { | |
801 | struct ec_cb *eb = (struct ec_cb *)&skb->cb; | |
802 | struct sockaddr_ec *sec = (struct sockaddr_ec *)&eb->sec; | |
803 | ||
804 | memset(sec, 0, sizeof(struct sockaddr_ec)); | |
805 | sec->sec_family = AF_ECONET; | |
806 | sec->type = ECTYPE_PACKET_RECEIVED; | |
807 | sec->port = port; | |
808 | sec->cb = cb; | |
809 | sec->addr.net = net; | |
810 | sec->addr.station = stn; | |
811 | ||
812 | return sock_queue_rcv_skb(sk, skb); | |
813 | } | |
814 | #endif | |
815 | ||
816 | #ifdef CONFIG_ECONET_AUNUDP | |
817 | /* | |
c9b6aab9 | 818 | * Send an AUN protocol response. |
1da177e4 LT |
819 | */ |
820 | ||
821 | static void aun_send_response(__u32 addr, unsigned long seq, int code, int cb) | |
822 | { | |
823 | struct sockaddr_in sin = { | |
824 | .sin_family = AF_INET, | |
825 | .sin_port = htons(AUN_PORT), | |
826 | .sin_addr = {.s_addr = addr} | |
827 | }; | |
828 | struct aunhdr ah = {.code = code, .cb = cb, .handle = seq}; | |
829 | struct kvec iov = {.iov_base = (void *)&ah, .iov_len = sizeof(ah)}; | |
830 | struct msghdr udpmsg; | |
c9b6aab9 | 831 | |
1da177e4 LT |
832 | udpmsg.msg_name = (void *)&sin; |
833 | udpmsg.msg_namelen = sizeof(sin); | |
834 | udpmsg.msg_control = NULL; | |
835 | udpmsg.msg_controllen = 0; | |
ee9c88f2 | 836 | udpmsg.msg_flags = 0; |
1da177e4 LT |
837 | |
838 | kernel_sendmsg(udpsock, &udpmsg, &iov, 1, sizeof(ah)); | |
839 | } | |
840 | ||
841 | ||
842 | /* | |
843 | * Handle incoming AUN packets. Work out if anybody wants them, | |
844 | * and send positive or negative acknowledgements as appropriate. | |
845 | */ | |
846 | ||
847 | static void aun_incoming(struct sk_buff *skb, struct aunhdr *ah, size_t len) | |
848 | { | |
eddc9ec5 | 849 | struct iphdr *ip = ip_hdr(skb); |
1da177e4 | 850 | unsigned char stn = ntohl(ip->saddr) & 0xff; |
4e085e76 DM |
851 | struct dst_entry *dst = skb_dst(skb); |
852 | struct ec_device *edev = NULL; | |
0c78a92f | 853 | struct sock *sk = NULL; |
1da177e4 | 854 | struct sk_buff *newskb; |
4e085e76 DM |
855 | |
856 | if (dst) | |
857 | edev = dst->dev->ec_ptr; | |
1da177e4 | 858 | |
ee9c88f2 | 859 | if (!edev) |
1da177e4 LT |
860 | goto bad; |
861 | ||
ee9c88f2 JP |
862 | sk = ec_listening_socket(ah->port, stn, edev->net); |
863 | if (sk == NULL) | |
1da177e4 LT |
864 | goto bad; /* Nobody wants it */ |
865 | ||
c9b6aab9 | 866 | newskb = alloc_skb((len - sizeof(struct aunhdr) + 15) & ~15, |
1da177e4 | 867 | GFP_ATOMIC); |
ee9c88f2 JP |
868 | if (newskb == NULL) { |
869 | pr_debug("AUN: memory squeeze, dropping packet\n"); | |
1da177e4 LT |
870 | /* Send nack and hope sender tries again */ |
871 | goto bad; | |
872 | } | |
873 | ||
ee9c88f2 | 874 | memcpy(skb_put(newskb, len - sizeof(struct aunhdr)), (void *)(ah + 1), |
1da177e4 LT |
875 | len - sizeof(struct aunhdr)); |
876 | ||
ee9c88f2 | 877 | if (ec_queue_packet(sk, newskb, stn, edev->net, ah->cb, ah->port)) { |
1da177e4 LT |
878 | /* Socket is bankrupt. */ |
879 | kfree_skb(newskb); | |
880 | goto bad; | |
881 | } | |
882 | ||
883 | aun_send_response(ip->saddr, ah->handle, 3, 0); | |
0c78a92f | 884 | sock_put(sk); |
1da177e4 LT |
885 | return; |
886 | ||
887 | bad: | |
888 | aun_send_response(ip->saddr, ah->handle, 4, 0); | |
0c78a92f ED |
889 | if (sk) |
890 | sock_put(sk); | |
1da177e4 LT |
891 | } |
892 | ||
893 | /* | |
894 | * Handle incoming AUN transmit acknowledgements. If the sequence | |
895 | * number matches something in our backlog then kill it and tell | |
896 | * the user. If the remote took too long to reply then we may have | |
897 | * dropped the packet already. | |
898 | */ | |
899 | ||
900 | static void aun_tx_ack(unsigned long seq, int result) | |
901 | { | |
902 | struct sk_buff *skb; | |
903 | unsigned long flags; | |
904 | struct ec_cb *eb; | |
905 | ||
906 | spin_lock_irqsave(&aun_queue_lock, flags); | |
de103342 | 907 | skb_queue_walk(&aun_queue, skb) { |
1da177e4 LT |
908 | eb = (struct ec_cb *)&skb->cb; |
909 | if (eb->seq == seq) | |
910 | goto foundit; | |
1da177e4 LT |
911 | } |
912 | spin_unlock_irqrestore(&aun_queue_lock, flags); | |
ee9c88f2 | 913 | pr_debug("AUN: unknown sequence %ld\n", seq); |
1da177e4 LT |
914 | return; |
915 | ||
916 | foundit: | |
917 | tx_result(skb->sk, eb->cookie, result); | |
8728b834 | 918 | skb_unlink(skb, &aun_queue); |
1da177e4 LT |
919 | spin_unlock_irqrestore(&aun_queue_lock, flags); |
920 | kfree_skb(skb); | |
921 | } | |
922 | ||
923 | /* | |
924 | * Deal with received AUN frames - sort out what type of thing it is | |
925 | * and hand it to the right function. | |
926 | */ | |
927 | ||
928 | static void aun_data_available(struct sock *sk, int slen) | |
929 | { | |
930 | int err; | |
931 | struct sk_buff *skb; | |
932 | unsigned char *data; | |
933 | struct aunhdr *ah; | |
1da177e4 LT |
934 | size_t len; |
935 | ||
936 | while ((skb = skb_recv_datagram(sk, 0, 1, &err)) == NULL) { | |
937 | if (err == -EAGAIN) { | |
ee9c88f2 | 938 | pr_err("AUN: no data available?!\n"); |
1da177e4 LT |
939 | return; |
940 | } | |
ee9c88f2 | 941 | pr_debug("AUN: recvfrom() error %d\n", -err); |
1da177e4 LT |
942 | } |
943 | ||
9c70220b | 944 | data = skb_transport_header(skb) + sizeof(struct udphdr); |
1da177e4 LT |
945 | ah = (struct aunhdr *)data; |
946 | len = skb->len - sizeof(struct udphdr); | |
1da177e4 | 947 | |
ee9c88f2 | 948 | switch (ah->code) { |
1da177e4 LT |
949 | case 2: |
950 | aun_incoming(skb, ah, len); | |
951 | break; | |
952 | case 3: | |
953 | aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_OK); | |
954 | break; | |
955 | case 4: | |
956 | aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_NOT_LISTENING); | |
957 | break; | |
1da177e4 | 958 | default: |
ee9c88f2 | 959 | pr_debug("AUN: unknown packet type: %d\n", data[0]); |
1da177e4 LT |
960 | } |
961 | ||
962 | skb_free_datagram(sk, skb); | |
963 | } | |
964 | ||
965 | /* | |
966 | * Called by the timer to manage the AUN transmit queue. If a packet | |
967 | * was sent to a dead or nonexistent host then we will never get an | |
968 | * acknowledgement back. After a few seconds we need to spot this and | |
969 | * drop the packet. | |
970 | */ | |
971 | ||
972 | static void ab_cleanup(unsigned long h) | |
973 | { | |
de103342 | 974 | struct sk_buff *skb, *n; |
1da177e4 LT |
975 | unsigned long flags; |
976 | ||
977 | spin_lock_irqsave(&aun_queue_lock, flags); | |
de103342 | 978 | skb_queue_walk_safe(&aun_queue, skb, n) { |
1da177e4 | 979 | struct ec_cb *eb = (struct ec_cb *)&skb->cb; |
de103342 | 980 | if ((jiffies - eb->start) > eb->timeout) { |
c9b6aab9 | 981 | tx_result(skb->sk, eb->cookie, |
1da177e4 | 982 | ECTYPE_TRANSMIT_NOT_PRESENT); |
8728b834 | 983 | skb_unlink(skb, &aun_queue); |
1da177e4 LT |
984 | kfree_skb(skb); |
985 | } | |
1da177e4 LT |
986 | } |
987 | spin_unlock_irqrestore(&aun_queue_lock, flags); | |
988 | ||
ee9c88f2 | 989 | mod_timer(&ab_cleanup_timer, jiffies + (HZ * 2)); |
1da177e4 LT |
990 | } |
991 | ||
992 | static int __init aun_udp_initialise(void) | |
993 | { | |
994 | int error; | |
995 | struct sockaddr_in sin; | |
996 | ||
997 | skb_queue_head_init(&aun_queue); | |
b24b8a24 | 998 | setup_timer(&ab_cleanup_timer, ab_cleanup, 0); |
ee9c88f2 | 999 | ab_cleanup_timer.expires = jiffies + (HZ * 2); |
1da177e4 LT |
1000 | add_timer(&ab_cleanup_timer); |
1001 | ||
1002 | memset(&sin, 0, sizeof(sin)); | |
1003 | sin.sin_port = htons(AUN_PORT); | |
1004 | ||
1005 | /* We can count ourselves lucky Acorn machines are too dim to | |
1006 | speak IPv6. :-) */ | |
ee9c88f2 JP |
1007 | error = sock_create_kern(PF_INET, SOCK_DGRAM, 0, &udpsock); |
1008 | if (error < 0) { | |
1009 | pr_err("AUN: socket error %d\n", -error); | |
1da177e4 LT |
1010 | return error; |
1011 | } | |
c9b6aab9 | 1012 | |
1da177e4 LT |
1013 | udpsock->sk->sk_reuse = 1; |
1014 | udpsock->sk->sk_allocation = GFP_ATOMIC; /* we're going to call it | |
1015 | from interrupts */ | |
c9b6aab9 | 1016 | |
1da177e4 | 1017 | error = udpsock->ops->bind(udpsock, (struct sockaddr *)&sin, |
ee9c88f2 JP |
1018 | sizeof(sin)); |
1019 | if (error < 0) { | |
1020 | pr_err("AUN: bind error %d\n", -error); | |
1da177e4 LT |
1021 | goto release; |
1022 | } | |
1023 | ||
1024 | udpsock->sk->sk_data_ready = aun_data_available; | |
1025 | ||
1026 | return 0; | |
1027 | ||
1028 | release: | |
1029 | sock_release(udpsock); | |
1030 | udpsock = NULL; | |
1031 | return error; | |
1032 | } | |
1033 | #endif | |
1034 | ||
1035 | #ifdef CONFIG_ECONET_NATIVE | |
1036 | ||
1037 | /* | |
1038 | * Receive an Econet frame from a device. | |
1039 | */ | |
1040 | ||
ee9c88f2 JP |
1041 | static int econet_rcv(struct sk_buff *skb, struct net_device *dev, |
1042 | struct packet_type *pt, struct net_device *orig_dev) | |
1da177e4 LT |
1043 | { |
1044 | struct ec_framehdr *hdr; | |
0c78a92f | 1045 | struct sock *sk = NULL; |
1da177e4 LT |
1046 | struct ec_device *edev = dev->ec_ptr; |
1047 | ||
721499e8 | 1048 | if (!net_eq(dev_net(dev), &init_net)) |
e730c155 EB |
1049 | goto drop; |
1050 | ||
1da177e4 LT |
1051 | if (skb->pkt_type == PACKET_OTHERHOST) |
1052 | goto drop; | |
1053 | ||
1054 | if (!edev) | |
1055 | goto drop; | |
1056 | ||
ee9c88f2 JP |
1057 | skb = skb_share_check(skb, GFP_ATOMIC); |
1058 | if (skb == NULL) | |
1da177e4 LT |
1059 | return NET_RX_DROP; |
1060 | ||
1061 | if (!pskb_may_pull(skb, sizeof(struct ec_framehdr))) | |
1062 | goto drop; | |
1063 | ||
ee9c88f2 | 1064 | hdr = (struct ec_framehdr *)skb->data; |
1da177e4 LT |
1065 | |
1066 | /* First check for encapsulated IP */ | |
1067 | if (hdr->port == EC_PORT_IP) { | |
1068 | skb->protocol = htons(ETH_P_IP); | |
1069 | skb_pull(skb, sizeof(struct ec_framehdr)); | |
1070 | netif_rx(skb); | |
482d804c | 1071 | return NET_RX_SUCCESS; |
1da177e4 LT |
1072 | } |
1073 | ||
1074 | sk = ec_listening_socket(hdr->port, hdr->src_stn, hdr->src_net); | |
1075 | if (!sk) | |
1076 | goto drop; | |
1077 | ||
1078 | if (ec_queue_packet(sk, skb, edev->net, hdr->src_stn, hdr->cb, | |
1079 | hdr->port)) | |
1080 | goto drop; | |
0c78a92f | 1081 | sock_put(sk); |
482d804c | 1082 | return NET_RX_SUCCESS; |
1da177e4 LT |
1083 | |
1084 | drop: | |
0c78a92f ED |
1085 | if (sk) |
1086 | sock_put(sk); | |
1da177e4 LT |
1087 | kfree_skb(skb); |
1088 | return NET_RX_DROP; | |
1089 | } | |
1090 | ||
7546dd97 | 1091 | static struct packet_type econet_packet_type __read_mostly = { |
ee9c88f2 JP |
1092 | .type = cpu_to_be16(ETH_P_ECONET), |
1093 | .func = econet_rcv, | |
1da177e4 LT |
1094 | }; |
1095 | ||
1096 | static void econet_hw_initialise(void) | |
1097 | { | |
1098 | dev_add_pack(&econet_packet_type); | |
1099 | } | |
1100 | ||
1101 | #endif | |
1102 | ||
ee9c88f2 JP |
1103 | static int econet_notifier(struct notifier_block *this, unsigned long msg, |
1104 | void *data) | |
1da177e4 | 1105 | { |
ee9c88f2 | 1106 | struct net_device *dev = data; |
1da177e4 LT |
1107 | struct ec_device *edev; |
1108 | ||
721499e8 | 1109 | if (!net_eq(dev_net(dev), &init_net)) |
e9dc8653 EB |
1110 | return NOTIFY_DONE; |
1111 | ||
1da177e4 LT |
1112 | switch (msg) { |
1113 | case NETDEV_UNREGISTER: | |
1114 | /* A device has gone down - kill any data we hold for it. */ | |
1115 | edev = dev->ec_ptr; | |
ee9c88f2 | 1116 | if (edev) { |
1da177e4 LT |
1117 | if (net2dev_map[0] == dev) |
1118 | net2dev_map[0] = NULL; | |
1119 | net2dev_map[edev->net] = NULL; | |
1120 | kfree(edev); | |
1121 | dev->ec_ptr = NULL; | |
1122 | } | |
1123 | break; | |
1124 | } | |
1125 | ||
1126 | return NOTIFY_DONE; | |
1127 | } | |
1128 | ||
1129 | static struct notifier_block econet_netdev_notifier = { | |
ee9c88f2 | 1130 | .notifier_call = econet_notifier, |
1da177e4 LT |
1131 | }; |
1132 | ||
1133 | static void __exit econet_proto_exit(void) | |
1134 | { | |
1135 | #ifdef CONFIG_ECONET_AUNUDP | |
1136 | del_timer(&ab_cleanup_timer); | |
1137 | if (udpsock) | |
1138 | sock_release(udpsock); | |
1139 | #endif | |
1140 | unregister_netdevice_notifier(&econet_netdev_notifier); | |
9c29a377 AD |
1141 | #ifdef CONFIG_ECONET_NATIVE |
1142 | dev_remove_pack(&econet_packet_type); | |
1143 | #endif | |
1da177e4 LT |
1144 | sock_unregister(econet_family_ops.family); |
1145 | proto_unregister(&econet_proto); | |
1146 | } | |
1147 | ||
1148 | static int __init econet_proto_init(void) | |
1149 | { | |
1150 | int err = proto_register(&econet_proto, 0); | |
1151 | ||
1152 | if (err != 0) | |
1153 | goto out; | |
1154 | sock_register(&econet_family_ops); | |
1155 | #ifdef CONFIG_ECONET_AUNUDP | |
1da177e4 LT |
1156 | aun_udp_initialise(); |
1157 | #endif | |
1158 | #ifdef CONFIG_ECONET_NATIVE | |
1159 | econet_hw_initialise(); | |
1160 | #endif | |
1161 | register_netdevice_notifier(&econet_netdev_notifier); | |
1162 | out: | |
1163 | return err; | |
1164 | } | |
1165 | ||
1166 | module_init(econet_proto_init); | |
1167 | module_exit(econet_proto_exit); | |
1168 | ||
1169 | MODULE_LICENSE("GPL"); | |
1170 | MODULE_ALIAS_NETPROTO(PF_ECONET); |