Commit | Line | Data |
---|---|---|
eac3731b JH |
1 | /* |
2 | * linux/net/iucv/af_iucv.c | |
3 | * | |
4 | * IUCV protocol stack for Linux on zSeries | |
5 | * | |
6 | * Copyright 2006 IBM Corporation | |
7 | * | |
8 | * Author(s): Jennifer Hunt <jenhunt@us.ibm.com> | |
9 | */ | |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/types.h> | |
13 | #include <linux/list.h> | |
14 | #include <linux/errno.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/sched.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/poll.h> | |
21 | #include <net/sock.h> | |
22 | #include <asm/ebcdic.h> | |
23 | #include <asm/cpcmd.h> | |
24 | #include <linux/kmod.h> | |
25 | ||
26 | #include <net/iucv/iucv.h> | |
27 | #include <net/iucv/af_iucv.h> | |
28 | ||
29 | #define CONFIG_IUCV_SOCK_DEBUG 1 | |
30 | ||
31 | #define IPRMDATA 0x80 | |
32 | #define VERSION "1.0" | |
33 | ||
34 | static char iucv_userid[80]; | |
35 | ||
36 | static struct proto_ops iucv_sock_ops; | |
37 | ||
38 | static struct proto iucv_proto = { | |
39 | .name = "AF_IUCV", | |
40 | .owner = THIS_MODULE, | |
41 | .obj_size = sizeof(struct iucv_sock), | |
42 | }; | |
43 | ||
44 | /* Call Back functions */ | |
45 | static void iucv_callback_rx(struct iucv_path *, struct iucv_message *); | |
46 | static void iucv_callback_txdone(struct iucv_path *, struct iucv_message *); | |
47 | static void iucv_callback_connack(struct iucv_path *, u8 ipuser[16]); | |
da99f056 HC |
48 | static int iucv_callback_connreq(struct iucv_path *, u8 ipvmid[8], |
49 | u8 ipuser[16]); | |
eac3731b JH |
50 | static void iucv_callback_connrej(struct iucv_path *, u8 ipuser[16]); |
51 | ||
52 | static struct iucv_sock_list iucv_sk_list = { | |
53 | .lock = RW_LOCK_UNLOCKED, | |
54 | .autobind_name = ATOMIC_INIT(0) | |
55 | }; | |
56 | ||
57 | static struct iucv_handler af_iucv_handler = { | |
58 | .path_pending = iucv_callback_connreq, | |
59 | .path_complete = iucv_callback_connack, | |
60 | .path_severed = iucv_callback_connrej, | |
61 | .message_pending = iucv_callback_rx, | |
62 | .message_complete = iucv_callback_txdone | |
63 | }; | |
64 | ||
65 | static inline void high_nmcpy(unsigned char *dst, char *src) | |
66 | { | |
67 | memcpy(dst, src, 8); | |
68 | } | |
69 | ||
70 | static inline void low_nmcpy(unsigned char *dst, char *src) | |
71 | { | |
72 | memcpy(&dst[8], src, 8); | |
73 | } | |
74 | ||
75 | /* Timers */ | |
76 | static void iucv_sock_timeout(unsigned long arg) | |
77 | { | |
78 | struct sock *sk = (struct sock *)arg; | |
79 | ||
80 | bh_lock_sock(sk); | |
81 | sk->sk_err = ETIMEDOUT; | |
82 | sk->sk_state_change(sk); | |
83 | bh_unlock_sock(sk); | |
84 | ||
85 | iucv_sock_kill(sk); | |
86 | sock_put(sk); | |
87 | } | |
88 | ||
89 | static void iucv_sock_clear_timer(struct sock *sk) | |
90 | { | |
91 | sk_stop_timer(sk, &sk->sk_timer); | |
92 | } | |
93 | ||
94 | static void iucv_sock_init_timer(struct sock *sk) | |
95 | { | |
96 | init_timer(&sk->sk_timer); | |
97 | sk->sk_timer.function = iucv_sock_timeout; | |
98 | sk->sk_timer.data = (unsigned long)sk; | |
99 | } | |
100 | ||
101 | static struct sock *__iucv_get_sock_by_name(char *nm) | |
102 | { | |
103 | struct sock *sk; | |
104 | struct hlist_node *node; | |
105 | ||
106 | sk_for_each(sk, node, &iucv_sk_list.head) | |
107 | if (!memcmp(&iucv_sk(sk)->src_name, nm, 8)) | |
108 | return sk; | |
109 | ||
110 | return NULL; | |
111 | } | |
112 | ||
113 | static void iucv_sock_destruct(struct sock *sk) | |
114 | { | |
115 | skb_queue_purge(&sk->sk_receive_queue); | |
116 | skb_queue_purge(&sk->sk_write_queue); | |
117 | } | |
118 | ||
119 | /* Cleanup Listen */ | |
120 | static void iucv_sock_cleanup_listen(struct sock *parent) | |
121 | { | |
122 | struct sock *sk; | |
123 | ||
124 | /* Close non-accepted connections */ | |
125 | while ((sk = iucv_accept_dequeue(parent, NULL))) { | |
126 | iucv_sock_close(sk); | |
127 | iucv_sock_kill(sk); | |
128 | } | |
129 | ||
130 | parent->sk_state = IUCV_CLOSED; | |
131 | sock_set_flag(parent, SOCK_ZAPPED); | |
132 | } | |
133 | ||
134 | /* Kill socket */ | |
135 | static void iucv_sock_kill(struct sock *sk) | |
136 | { | |
137 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
138 | return; | |
139 | ||
140 | iucv_sock_unlink(&iucv_sk_list, sk); | |
141 | sock_set_flag(sk, SOCK_DEAD); | |
142 | sock_put(sk); | |
143 | } | |
144 | ||
145 | /* Close an IUCV socket */ | |
146 | static void iucv_sock_close(struct sock *sk) | |
147 | { | |
148 | unsigned char user_data[16]; | |
149 | struct iucv_sock *iucv = iucv_sk(sk); | |
150 | int err; | |
561e0360 | 151 | unsigned long timeo; |
eac3731b JH |
152 | |
153 | iucv_sock_clear_timer(sk); | |
154 | lock_sock(sk); | |
155 | ||
da99f056 | 156 | switch (sk->sk_state) { |
eac3731b JH |
157 | case IUCV_LISTEN: |
158 | iucv_sock_cleanup_listen(sk); | |
159 | break; | |
160 | ||
161 | case IUCV_CONNECTED: | |
162 | case IUCV_DISCONN: | |
163 | err = 0; | |
561e0360 JH |
164 | |
165 | sk->sk_state = IUCV_CLOSING; | |
166 | sk->sk_state_change(sk); | |
167 | ||
da99f056 | 168 | if (!skb_queue_empty(&iucv->send_skb_q)) { |
561e0360 JH |
169 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) |
170 | timeo = sk->sk_lingertime; | |
171 | else | |
172 | timeo = IUCV_DISCONN_TIMEOUT; | |
173 | err = iucv_sock_wait_state(sk, IUCV_CLOSED, 0, timeo); | |
174 | } | |
175 | ||
176 | sk->sk_state = IUCV_CLOSED; | |
177 | sk->sk_state_change(sk); | |
178 | ||
eac3731b JH |
179 | if (iucv->path) { |
180 | low_nmcpy(user_data, iucv->src_name); | |
181 | high_nmcpy(user_data, iucv->dst_name); | |
182 | ASCEBC(user_data, sizeof(user_data)); | |
183 | err = iucv_path_sever(iucv->path, user_data); | |
184 | iucv_path_free(iucv->path); | |
185 | iucv->path = NULL; | |
186 | } | |
187 | ||
eac3731b JH |
188 | sk->sk_err = ECONNRESET; |
189 | sk->sk_state_change(sk); | |
190 | ||
191 | skb_queue_purge(&iucv->send_skb_q); | |
561e0360 | 192 | skb_queue_purge(&iucv->backlog_skb_q); |
eac3731b JH |
193 | |
194 | sock_set_flag(sk, SOCK_ZAPPED); | |
195 | break; | |
196 | ||
197 | default: | |
198 | sock_set_flag(sk, SOCK_ZAPPED); | |
199 | break; | |
3ff50b79 | 200 | } |
eac3731b JH |
201 | |
202 | release_sock(sk); | |
203 | iucv_sock_kill(sk); | |
204 | } | |
205 | ||
206 | static void iucv_sock_init(struct sock *sk, struct sock *parent) | |
207 | { | |
208 | if (parent) | |
209 | sk->sk_type = parent->sk_type; | |
210 | } | |
211 | ||
212 | static struct sock *iucv_sock_alloc(struct socket *sock, int proto, gfp_t prio) | |
213 | { | |
214 | struct sock *sk; | |
215 | ||
1b8d7ae4 | 216 | sk = sk_alloc(&init_net, PF_IUCV, prio, &iucv_proto, 1); |
eac3731b JH |
217 | if (!sk) |
218 | return NULL; | |
219 | ||
220 | sock_init_data(sock, sk); | |
221 | INIT_LIST_HEAD(&iucv_sk(sk)->accept_q); | |
febca281 | 222 | spin_lock_init(&iucv_sk(sk)->accept_q_lock); |
eac3731b | 223 | skb_queue_head_init(&iucv_sk(sk)->send_skb_q); |
561e0360 | 224 | skb_queue_head_init(&iucv_sk(sk)->backlog_skb_q); |
eac3731b JH |
225 | iucv_sk(sk)->send_tag = 0; |
226 | ||
227 | sk->sk_destruct = iucv_sock_destruct; | |
228 | sk->sk_sndtimeo = IUCV_CONN_TIMEOUT; | |
229 | sk->sk_allocation = GFP_DMA; | |
230 | ||
231 | sock_reset_flag(sk, SOCK_ZAPPED); | |
232 | ||
233 | sk->sk_protocol = proto; | |
234 | sk->sk_state = IUCV_OPEN; | |
235 | ||
236 | iucv_sock_init_timer(sk); | |
237 | ||
238 | iucv_sock_link(&iucv_sk_list, sk); | |
239 | return sk; | |
240 | } | |
241 | ||
242 | /* Create an IUCV socket */ | |
1b8d7ae4 | 243 | static int iucv_sock_create(struct net *net, struct socket *sock, int protocol) |
eac3731b JH |
244 | { |
245 | struct sock *sk; | |
246 | ||
247 | if (sock->type != SOCK_STREAM) | |
248 | return -ESOCKTNOSUPPORT; | |
249 | ||
250 | sock->state = SS_UNCONNECTED; | |
251 | sock->ops = &iucv_sock_ops; | |
252 | ||
253 | sk = iucv_sock_alloc(sock, protocol, GFP_KERNEL); | |
254 | if (!sk) | |
255 | return -ENOMEM; | |
256 | ||
257 | iucv_sock_init(sk, NULL); | |
258 | ||
259 | return 0; | |
260 | } | |
261 | ||
262 | void iucv_sock_link(struct iucv_sock_list *l, struct sock *sk) | |
263 | { | |
264 | write_lock_bh(&l->lock); | |
265 | sk_add_node(sk, &l->head); | |
266 | write_unlock_bh(&l->lock); | |
267 | } | |
268 | ||
269 | void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *sk) | |
270 | { | |
271 | write_lock_bh(&l->lock); | |
272 | sk_del_node_init(sk); | |
273 | write_unlock_bh(&l->lock); | |
274 | } | |
275 | ||
276 | void iucv_accept_enqueue(struct sock *parent, struct sock *sk) | |
277 | { | |
febca281 UB |
278 | unsigned long flags; |
279 | struct iucv_sock *par = iucv_sk(parent); | |
280 | ||
eac3731b | 281 | sock_hold(sk); |
febca281 UB |
282 | spin_lock_irqsave(&par->accept_q_lock, flags); |
283 | list_add_tail(&iucv_sk(sk)->accept_q, &par->accept_q); | |
284 | spin_unlock_irqrestore(&par->accept_q_lock, flags); | |
eac3731b JH |
285 | iucv_sk(sk)->parent = parent; |
286 | parent->sk_ack_backlog++; | |
287 | } | |
288 | ||
289 | void iucv_accept_unlink(struct sock *sk) | |
290 | { | |
febca281 UB |
291 | unsigned long flags; |
292 | struct iucv_sock *par = iucv_sk(iucv_sk(sk)->parent); | |
293 | ||
294 | spin_lock_irqsave(&par->accept_q_lock, flags); | |
eac3731b | 295 | list_del_init(&iucv_sk(sk)->accept_q); |
febca281 | 296 | spin_unlock_irqrestore(&par->accept_q_lock, flags); |
eac3731b JH |
297 | iucv_sk(sk)->parent->sk_ack_backlog--; |
298 | iucv_sk(sk)->parent = NULL; | |
299 | sock_put(sk); | |
300 | } | |
301 | ||
302 | struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock) | |
303 | { | |
304 | struct iucv_sock *isk, *n; | |
305 | struct sock *sk; | |
306 | ||
da99f056 | 307 | list_for_each_entry_safe(isk, n, &iucv_sk(parent)->accept_q, accept_q) { |
eac3731b JH |
308 | sk = (struct sock *) isk; |
309 | lock_sock(sk); | |
310 | ||
311 | if (sk->sk_state == IUCV_CLOSED) { | |
eac3731b | 312 | iucv_accept_unlink(sk); |
febca281 | 313 | release_sock(sk); |
eac3731b JH |
314 | continue; |
315 | } | |
316 | ||
317 | if (sk->sk_state == IUCV_CONNECTED || | |
318 | sk->sk_state == IUCV_SEVERED || | |
319 | !newsock) { | |
320 | iucv_accept_unlink(sk); | |
321 | if (newsock) | |
322 | sock_graft(sk, newsock); | |
323 | ||
324 | if (sk->sk_state == IUCV_SEVERED) | |
325 | sk->sk_state = IUCV_DISCONN; | |
326 | ||
327 | release_sock(sk); | |
328 | return sk; | |
329 | } | |
330 | ||
331 | release_sock(sk); | |
332 | } | |
333 | return NULL; | |
334 | } | |
335 | ||
336 | int iucv_sock_wait_state(struct sock *sk, int state, int state2, | |
337 | unsigned long timeo) | |
338 | { | |
339 | DECLARE_WAITQUEUE(wait, current); | |
340 | int err = 0; | |
341 | ||
342 | add_wait_queue(sk->sk_sleep, &wait); | |
343 | while (sk->sk_state != state && sk->sk_state != state2) { | |
344 | set_current_state(TASK_INTERRUPTIBLE); | |
345 | ||
346 | if (!timeo) { | |
347 | err = -EAGAIN; | |
348 | break; | |
349 | } | |
350 | ||
351 | if (signal_pending(current)) { | |
352 | err = sock_intr_errno(timeo); | |
353 | break; | |
354 | } | |
355 | ||
356 | release_sock(sk); | |
357 | timeo = schedule_timeout(timeo); | |
358 | lock_sock(sk); | |
359 | ||
360 | err = sock_error(sk); | |
361 | if (err) | |
362 | break; | |
363 | } | |
364 | set_current_state(TASK_RUNNING); | |
365 | remove_wait_queue(sk->sk_sleep, &wait); | |
366 | return err; | |
367 | } | |
368 | ||
369 | /* Bind an unbound socket */ | |
370 | static int iucv_sock_bind(struct socket *sock, struct sockaddr *addr, | |
371 | int addr_len) | |
372 | { | |
373 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
374 | struct sock *sk = sock->sk; | |
375 | struct iucv_sock *iucv; | |
376 | int err; | |
377 | ||
378 | /* Verify the input sockaddr */ | |
379 | if (!addr || addr->sa_family != AF_IUCV) | |
380 | return -EINVAL; | |
381 | ||
382 | lock_sock(sk); | |
383 | if (sk->sk_state != IUCV_OPEN) { | |
384 | err = -EBADFD; | |
385 | goto done; | |
386 | } | |
387 | ||
388 | write_lock_bh(&iucv_sk_list.lock); | |
389 | ||
390 | iucv = iucv_sk(sk); | |
391 | if (__iucv_get_sock_by_name(sa->siucv_name)) { | |
392 | err = -EADDRINUSE; | |
393 | goto done_unlock; | |
394 | } | |
395 | if (iucv->path) { | |
396 | err = 0; | |
397 | goto done_unlock; | |
398 | } | |
399 | ||
400 | /* Bind the socket */ | |
401 | memcpy(iucv->src_name, sa->siucv_name, 8); | |
402 | ||
403 | /* Copy the user id */ | |
404 | memcpy(iucv->src_user_id, iucv_userid, 8); | |
405 | sk->sk_state = IUCV_BOUND; | |
406 | err = 0; | |
407 | ||
408 | done_unlock: | |
409 | /* Release the socket list lock */ | |
410 | write_unlock_bh(&iucv_sk_list.lock); | |
411 | done: | |
412 | release_sock(sk); | |
413 | return err; | |
414 | } | |
415 | ||
416 | /* Automatically bind an unbound socket */ | |
417 | static int iucv_sock_autobind(struct sock *sk) | |
418 | { | |
419 | struct iucv_sock *iucv = iucv_sk(sk); | |
420 | char query_buffer[80]; | |
421 | char name[12]; | |
422 | int err = 0; | |
423 | ||
424 | /* Set the userid and name */ | |
425 | cpcmd("QUERY USERID", query_buffer, sizeof(query_buffer), &err); | |
426 | if (unlikely(err)) | |
427 | return -EPROTO; | |
428 | ||
429 | memcpy(iucv->src_user_id, query_buffer, 8); | |
430 | ||
431 | write_lock_bh(&iucv_sk_list.lock); | |
432 | ||
433 | sprintf(name, "%08x", atomic_inc_return(&iucv_sk_list.autobind_name)); | |
434 | while (__iucv_get_sock_by_name(name)) { | |
435 | sprintf(name, "%08x", | |
436 | atomic_inc_return(&iucv_sk_list.autobind_name)); | |
437 | } | |
438 | ||
439 | write_unlock_bh(&iucv_sk_list.lock); | |
440 | ||
441 | memcpy(&iucv->src_name, name, 8); | |
442 | ||
443 | return err; | |
444 | } | |
445 | ||
446 | /* Connect an unconnected socket */ | |
447 | static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr, | |
448 | int alen, int flags) | |
449 | { | |
450 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
451 | struct sock *sk = sock->sk; | |
452 | struct iucv_sock *iucv; | |
453 | unsigned char user_data[16]; | |
454 | int err; | |
455 | ||
456 | if (addr->sa_family != AF_IUCV || alen < sizeof(struct sockaddr_iucv)) | |
457 | return -EINVAL; | |
458 | ||
459 | if (sk->sk_state != IUCV_OPEN && sk->sk_state != IUCV_BOUND) | |
460 | return -EBADFD; | |
461 | ||
462 | if (sk->sk_type != SOCK_STREAM) | |
463 | return -EINVAL; | |
464 | ||
465 | iucv = iucv_sk(sk); | |
466 | ||
467 | if (sk->sk_state == IUCV_OPEN) { | |
468 | err = iucv_sock_autobind(sk); | |
469 | if (unlikely(err)) | |
470 | return err; | |
471 | } | |
472 | ||
473 | lock_sock(sk); | |
474 | ||
475 | /* Set the destination information */ | |
476 | memcpy(iucv_sk(sk)->dst_user_id, sa->siucv_user_id, 8); | |
477 | memcpy(iucv_sk(sk)->dst_name, sa->siucv_name, 8); | |
478 | ||
479 | high_nmcpy(user_data, sa->siucv_name); | |
480 | low_nmcpy(user_data, iucv_sk(sk)->src_name); | |
481 | ASCEBC(user_data, sizeof(user_data)); | |
482 | ||
483 | iucv = iucv_sk(sk); | |
484 | /* Create path. */ | |
485 | iucv->path = iucv_path_alloc(IUCV_QUEUELEN_DEFAULT, | |
486 | IPRMDATA, GFP_KERNEL); | |
487 | err = iucv_path_connect(iucv->path, &af_iucv_handler, | |
488 | sa->siucv_user_id, NULL, user_data, sk); | |
489 | if (err) { | |
490 | iucv_path_free(iucv->path); | |
491 | iucv->path = NULL; | |
492 | err = -ECONNREFUSED; | |
493 | goto done; | |
494 | } | |
495 | ||
496 | if (sk->sk_state != IUCV_CONNECTED) { | |
497 | err = iucv_sock_wait_state(sk, IUCV_CONNECTED, IUCV_DISCONN, | |
498 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
499 | } | |
500 | ||
501 | if (sk->sk_state == IUCV_DISCONN) { | |
502 | release_sock(sk); | |
503 | return -ECONNREFUSED; | |
504 | } | |
505 | done: | |
506 | release_sock(sk); | |
507 | return err; | |
508 | } | |
509 | ||
510 | /* Move a socket into listening state. */ | |
511 | static int iucv_sock_listen(struct socket *sock, int backlog) | |
512 | { | |
513 | struct sock *sk = sock->sk; | |
514 | int err; | |
515 | ||
516 | lock_sock(sk); | |
517 | ||
518 | err = -EINVAL; | |
519 | if (sk->sk_state != IUCV_BOUND || sock->type != SOCK_STREAM) | |
520 | goto done; | |
521 | ||
522 | sk->sk_max_ack_backlog = backlog; | |
523 | sk->sk_ack_backlog = 0; | |
524 | sk->sk_state = IUCV_LISTEN; | |
525 | err = 0; | |
526 | ||
527 | done: | |
528 | release_sock(sk); | |
529 | return err; | |
530 | } | |
531 | ||
532 | /* Accept a pending connection */ | |
533 | static int iucv_sock_accept(struct socket *sock, struct socket *newsock, | |
534 | int flags) | |
535 | { | |
536 | DECLARE_WAITQUEUE(wait, current); | |
537 | struct sock *sk = sock->sk, *nsk; | |
538 | long timeo; | |
539 | int err = 0; | |
540 | ||
561e0360 | 541 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
eac3731b JH |
542 | |
543 | if (sk->sk_state != IUCV_LISTEN) { | |
544 | err = -EBADFD; | |
545 | goto done; | |
546 | } | |
547 | ||
548 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
549 | ||
550 | /* Wait for an incoming connection */ | |
551 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
da99f056 | 552 | while (!(nsk = iucv_accept_dequeue(sk, newsock))) { |
eac3731b JH |
553 | set_current_state(TASK_INTERRUPTIBLE); |
554 | if (!timeo) { | |
555 | err = -EAGAIN; | |
556 | break; | |
557 | } | |
558 | ||
559 | release_sock(sk); | |
560 | timeo = schedule_timeout(timeo); | |
561e0360 | 561 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
eac3731b JH |
562 | |
563 | if (sk->sk_state != IUCV_LISTEN) { | |
564 | err = -EBADFD; | |
565 | break; | |
566 | } | |
567 | ||
568 | if (signal_pending(current)) { | |
569 | err = sock_intr_errno(timeo); | |
570 | break; | |
571 | } | |
572 | } | |
573 | ||
574 | set_current_state(TASK_RUNNING); | |
575 | remove_wait_queue(sk->sk_sleep, &wait); | |
576 | ||
577 | if (err) | |
578 | goto done; | |
579 | ||
580 | newsock->state = SS_CONNECTED; | |
581 | ||
582 | done: | |
583 | release_sock(sk); | |
584 | return err; | |
585 | } | |
586 | ||
587 | static int iucv_sock_getname(struct socket *sock, struct sockaddr *addr, | |
588 | int *len, int peer) | |
589 | { | |
590 | struct sockaddr_iucv *siucv = (struct sockaddr_iucv *) addr; | |
591 | struct sock *sk = sock->sk; | |
592 | ||
593 | addr->sa_family = AF_IUCV; | |
594 | *len = sizeof(struct sockaddr_iucv); | |
595 | ||
596 | if (peer) { | |
597 | memcpy(siucv->siucv_user_id, iucv_sk(sk)->dst_user_id, 8); | |
598 | memcpy(siucv->siucv_name, &iucv_sk(sk)->dst_name, 8); | |
599 | } else { | |
600 | memcpy(siucv->siucv_user_id, iucv_sk(sk)->src_user_id, 8); | |
601 | memcpy(siucv->siucv_name, iucv_sk(sk)->src_name, 8); | |
602 | } | |
603 | memset(&siucv->siucv_port, 0, sizeof(siucv->siucv_port)); | |
604 | memset(&siucv->siucv_addr, 0, sizeof(siucv->siucv_addr)); | |
605 | memset(siucv->siucv_nodeid, 0, sizeof(siucv->siucv_nodeid)); | |
606 | ||
607 | return 0; | |
608 | } | |
609 | ||
610 | static int iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock, | |
611 | struct msghdr *msg, size_t len) | |
612 | { | |
613 | struct sock *sk = sock->sk; | |
614 | struct iucv_sock *iucv = iucv_sk(sk); | |
615 | struct sk_buff *skb; | |
616 | struct iucv_message txmsg; | |
617 | int err; | |
618 | ||
619 | err = sock_error(sk); | |
620 | if (err) | |
621 | return err; | |
622 | ||
623 | if (msg->msg_flags & MSG_OOB) | |
624 | return -EOPNOTSUPP; | |
625 | ||
626 | lock_sock(sk); | |
627 | ||
628 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
629 | err = -EPIPE; | |
630 | goto out; | |
631 | } | |
632 | ||
da99f056 HC |
633 | if (sk->sk_state == IUCV_CONNECTED) { |
634 | if (!(skb = sock_alloc_send_skb(sk, len, | |
635 | msg->msg_flags & MSG_DONTWAIT, | |
636 | &err))) | |
561e0360 | 637 | goto out; |
eac3731b | 638 | |
da99f056 | 639 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { |
eac3731b JH |
640 | err = -EFAULT; |
641 | goto fail; | |
642 | } | |
643 | ||
644 | txmsg.class = 0; | |
645 | txmsg.tag = iucv->send_tag++; | |
646 | memcpy(skb->cb, &txmsg.tag, 4); | |
647 | skb_queue_tail(&iucv->send_skb_q, skb); | |
648 | err = iucv_message_send(iucv->path, &txmsg, 0, 0, | |
649 | (void *) skb->data, skb->len); | |
650 | if (err) { | |
651 | if (err == 3) | |
652 | printk(KERN_ERR "AF_IUCV msg limit exceeded\n"); | |
653 | skb_unlink(skb, &iucv->send_skb_q); | |
654 | err = -EPIPE; | |
655 | goto fail; | |
656 | } | |
657 | ||
658 | } else { | |
659 | err = -ENOTCONN; | |
660 | goto out; | |
661 | } | |
662 | ||
663 | release_sock(sk); | |
664 | return len; | |
665 | ||
666 | fail: | |
667 | kfree_skb(skb); | |
668 | out: | |
669 | release_sock(sk); | |
670 | return err; | |
671 | } | |
672 | ||
673 | static int iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock, | |
674 | struct msghdr *msg, size_t len, int flags) | |
675 | { | |
676 | int noblock = flags & MSG_DONTWAIT; | |
677 | struct sock *sk = sock->sk; | |
561e0360 | 678 | struct iucv_sock *iucv = iucv_sk(sk); |
eac3731b | 679 | int target, copied = 0; |
561e0360 | 680 | struct sk_buff *skb, *rskb, *cskb; |
eac3731b JH |
681 | int err = 0; |
682 | ||
561e0360 JH |
683 | if ((sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_SEVERED) && |
684 | skb_queue_empty(&iucv->backlog_skb_q) && | |
685 | skb_queue_empty(&sk->sk_receive_queue)) | |
686 | return 0; | |
687 | ||
eac3731b JH |
688 | if (flags & (MSG_OOB)) |
689 | return -EOPNOTSUPP; | |
690 | ||
691 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, len); | |
692 | ||
693 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
694 | if (!skb) { | |
695 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
696 | return 0; | |
697 | return err; | |
698 | } | |
699 | ||
700 | copied = min_t(unsigned int, skb->len, len); | |
701 | ||
561e0360 JH |
702 | cskb = skb; |
703 | if (memcpy_toiovec(msg->msg_iov, cskb->data, copied)) { | |
eac3731b JH |
704 | skb_queue_head(&sk->sk_receive_queue, skb); |
705 | if (copied == 0) | |
706 | return -EFAULT; | |
561e0360 | 707 | goto done; |
eac3731b JH |
708 | } |
709 | ||
710 | len -= copied; | |
711 | ||
712 | /* Mark read part of skb as used */ | |
713 | if (!(flags & MSG_PEEK)) { | |
714 | skb_pull(skb, copied); | |
715 | ||
716 | if (skb->len) { | |
717 | skb_queue_head(&sk->sk_receive_queue, skb); | |
718 | goto done; | |
719 | } | |
720 | ||
721 | kfree_skb(skb); | |
561e0360 JH |
722 | |
723 | /* Queue backlog skbs */ | |
724 | rskb = skb_dequeue(&iucv_sk(sk)->backlog_skb_q); | |
da99f056 | 725 | while (rskb) { |
561e0360 JH |
726 | if (sock_queue_rcv_skb(sk, rskb)) { |
727 | skb_queue_head(&iucv_sk(sk)->backlog_skb_q, | |
728 | rskb); | |
729 | break; | |
730 | } else { | |
731 | rskb = skb_dequeue(&iucv_sk(sk)->backlog_skb_q); | |
732 | } | |
733 | } | |
eac3731b JH |
734 | } else |
735 | skb_queue_head(&sk->sk_receive_queue, skb); | |
736 | ||
737 | done: | |
738 | return err ? : copied; | |
739 | } | |
740 | ||
741 | static inline unsigned int iucv_accept_poll(struct sock *parent) | |
742 | { | |
743 | struct iucv_sock *isk, *n; | |
744 | struct sock *sk; | |
745 | ||
da99f056 | 746 | list_for_each_entry_safe(isk, n, &iucv_sk(parent)->accept_q, accept_q) { |
eac3731b JH |
747 | sk = (struct sock *) isk; |
748 | ||
749 | if (sk->sk_state == IUCV_CONNECTED) | |
750 | return POLLIN | POLLRDNORM; | |
751 | } | |
752 | ||
753 | return 0; | |
754 | } | |
755 | ||
756 | unsigned int iucv_sock_poll(struct file *file, struct socket *sock, | |
757 | poll_table *wait) | |
758 | { | |
759 | struct sock *sk = sock->sk; | |
760 | unsigned int mask = 0; | |
761 | ||
762 | poll_wait(file, sk->sk_sleep, wait); | |
763 | ||
764 | if (sk->sk_state == IUCV_LISTEN) | |
765 | return iucv_accept_poll(sk); | |
766 | ||
767 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
768 | mask |= POLLERR; | |
769 | ||
770 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
771 | mask |= POLLRDHUP; | |
772 | ||
773 | if (sk->sk_shutdown == SHUTDOWN_MASK) | |
774 | mask |= POLLHUP; | |
775 | ||
776 | if (!skb_queue_empty(&sk->sk_receive_queue) || | |
da99f056 | 777 | (sk->sk_shutdown & RCV_SHUTDOWN)) |
eac3731b JH |
778 | mask |= POLLIN | POLLRDNORM; |
779 | ||
780 | if (sk->sk_state == IUCV_CLOSED) | |
781 | mask |= POLLHUP; | |
782 | ||
561e0360 JH |
783 | if (sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_SEVERED) |
784 | mask |= POLLIN; | |
785 | ||
eac3731b JH |
786 | if (sock_writeable(sk)) |
787 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; | |
788 | else | |
789 | set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); | |
790 | ||
791 | return mask; | |
792 | } | |
793 | ||
794 | static int iucv_sock_shutdown(struct socket *sock, int how) | |
795 | { | |
796 | struct sock *sk = sock->sk; | |
797 | struct iucv_sock *iucv = iucv_sk(sk); | |
798 | struct iucv_message txmsg; | |
799 | int err = 0; | |
800 | u8 prmmsg[8] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}; | |
801 | ||
802 | how++; | |
803 | ||
804 | if ((how & ~SHUTDOWN_MASK) || !how) | |
805 | return -EINVAL; | |
806 | ||
807 | lock_sock(sk); | |
da99f056 | 808 | switch (sk->sk_state) { |
eac3731b JH |
809 | case IUCV_CLOSED: |
810 | err = -ENOTCONN; | |
811 | goto fail; | |
812 | ||
813 | default: | |
814 | sk->sk_shutdown |= how; | |
815 | break; | |
816 | } | |
817 | ||
818 | if (how == SEND_SHUTDOWN || how == SHUTDOWN_MASK) { | |
819 | txmsg.class = 0; | |
820 | txmsg.tag = 0; | |
821 | err = iucv_message_send(iucv->path, &txmsg, IUCV_IPRMDATA, 0, | |
822 | (void *) prmmsg, 8); | |
823 | if (err) { | |
da99f056 | 824 | switch (err) { |
eac3731b JH |
825 | case 1: |
826 | err = -ENOTCONN; | |
827 | break; | |
828 | case 2: | |
829 | err = -ECONNRESET; | |
830 | break; | |
831 | default: | |
832 | err = -ENOTCONN; | |
833 | break; | |
834 | } | |
835 | } | |
836 | } | |
837 | ||
838 | if (how == RCV_SHUTDOWN || how == SHUTDOWN_MASK) { | |
839 | err = iucv_path_quiesce(iucv_sk(sk)->path, NULL); | |
840 | if (err) | |
841 | err = -ENOTCONN; | |
842 | ||
843 | skb_queue_purge(&sk->sk_receive_queue); | |
844 | } | |
845 | ||
846 | /* Wake up anyone sleeping in poll */ | |
847 | sk->sk_state_change(sk); | |
848 | ||
849 | fail: | |
850 | release_sock(sk); | |
851 | return err; | |
852 | } | |
853 | ||
854 | static int iucv_sock_release(struct socket *sock) | |
855 | { | |
856 | struct sock *sk = sock->sk; | |
857 | int err = 0; | |
858 | ||
859 | if (!sk) | |
860 | return 0; | |
861 | ||
862 | iucv_sock_close(sk); | |
863 | ||
864 | /* Unregister with IUCV base support */ | |
865 | if (iucv_sk(sk)->path) { | |
866 | iucv_path_sever(iucv_sk(sk)->path, NULL); | |
867 | iucv_path_free(iucv_sk(sk)->path); | |
868 | iucv_sk(sk)->path = NULL; | |
869 | } | |
870 | ||
eac3731b JH |
871 | sock_orphan(sk); |
872 | iucv_sock_kill(sk); | |
873 | return err; | |
874 | } | |
875 | ||
876 | /* Callback wrappers - called from iucv base support */ | |
877 | static int iucv_callback_connreq(struct iucv_path *path, | |
878 | u8 ipvmid[8], u8 ipuser[16]) | |
879 | { | |
880 | unsigned char user_data[16]; | |
881 | unsigned char nuser_data[16]; | |
882 | unsigned char src_name[8]; | |
883 | struct hlist_node *node; | |
884 | struct sock *sk, *nsk; | |
885 | struct iucv_sock *iucv, *niucv; | |
886 | int err; | |
887 | ||
888 | memcpy(src_name, ipuser, 8); | |
889 | EBCASC(src_name, 8); | |
890 | /* Find out if this path belongs to af_iucv. */ | |
891 | read_lock(&iucv_sk_list.lock); | |
892 | iucv = NULL; | |
febca281 | 893 | sk = NULL; |
eac3731b JH |
894 | sk_for_each(sk, node, &iucv_sk_list.head) |
895 | if (sk->sk_state == IUCV_LISTEN && | |
896 | !memcmp(&iucv_sk(sk)->src_name, src_name, 8)) { | |
897 | /* | |
898 | * Found a listening socket with | |
899 | * src_name == ipuser[0-7]. | |
900 | */ | |
901 | iucv = iucv_sk(sk); | |
902 | break; | |
903 | } | |
904 | read_unlock(&iucv_sk_list.lock); | |
905 | if (!iucv) | |
906 | /* No socket found, not one of our paths. */ | |
907 | return -EINVAL; | |
908 | ||
909 | bh_lock_sock(sk); | |
910 | ||
911 | /* Check if parent socket is listening */ | |
912 | low_nmcpy(user_data, iucv->src_name); | |
913 | high_nmcpy(user_data, iucv->dst_name); | |
914 | ASCEBC(user_data, sizeof(user_data)); | |
915 | if (sk->sk_state != IUCV_LISTEN) { | |
916 | err = iucv_path_sever(path, user_data); | |
917 | goto fail; | |
918 | } | |
919 | ||
920 | /* Check for backlog size */ | |
921 | if (sk_acceptq_is_full(sk)) { | |
922 | err = iucv_path_sever(path, user_data); | |
923 | goto fail; | |
924 | } | |
925 | ||
926 | /* Create the new socket */ | |
927 | nsk = iucv_sock_alloc(NULL, SOCK_STREAM, GFP_ATOMIC); | |
da99f056 | 928 | if (!nsk) { |
eac3731b JH |
929 | err = iucv_path_sever(path, user_data); |
930 | goto fail; | |
931 | } | |
932 | ||
933 | niucv = iucv_sk(nsk); | |
934 | iucv_sock_init(nsk, sk); | |
935 | ||
936 | /* Set the new iucv_sock */ | |
937 | memcpy(niucv->dst_name, ipuser + 8, 8); | |
938 | EBCASC(niucv->dst_name, 8); | |
939 | memcpy(niucv->dst_user_id, ipvmid, 8); | |
940 | memcpy(niucv->src_name, iucv->src_name, 8); | |
941 | memcpy(niucv->src_user_id, iucv->src_user_id, 8); | |
942 | niucv->path = path; | |
943 | ||
944 | /* Call iucv_accept */ | |
945 | high_nmcpy(nuser_data, ipuser + 8); | |
946 | memcpy(nuser_data + 8, niucv->src_name, 8); | |
947 | ASCEBC(nuser_data + 8, 8); | |
948 | ||
949 | path->msglim = IUCV_QUEUELEN_DEFAULT; | |
950 | err = iucv_path_accept(path, &af_iucv_handler, nuser_data, nsk); | |
da99f056 | 951 | if (err) { |
eac3731b JH |
952 | err = iucv_path_sever(path, user_data); |
953 | goto fail; | |
954 | } | |
955 | ||
956 | iucv_accept_enqueue(sk, nsk); | |
957 | ||
958 | /* Wake up accept */ | |
959 | nsk->sk_state = IUCV_CONNECTED; | |
960 | sk->sk_data_ready(sk, 1); | |
961 | err = 0; | |
962 | fail: | |
963 | bh_unlock_sock(sk); | |
964 | return 0; | |
965 | } | |
966 | ||
967 | static void iucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) | |
968 | { | |
969 | struct sock *sk = path->private; | |
970 | ||
971 | sk->sk_state = IUCV_CONNECTED; | |
972 | sk->sk_state_change(sk); | |
973 | } | |
974 | ||
561e0360 | 975 | static int iucv_fragment_skb(struct sock *sk, struct sk_buff *skb, int len, |
af7cd373 | 976 | struct sk_buff_head *fragmented_skb_q) |
561e0360 JH |
977 | { |
978 | int dataleft, size, copied = 0; | |
979 | struct sk_buff *nskb; | |
980 | ||
981 | dataleft = len; | |
da99f056 | 982 | while (dataleft) { |
561e0360 JH |
983 | if (dataleft >= sk->sk_rcvbuf / 4) |
984 | size = sk->sk_rcvbuf / 4; | |
985 | else | |
986 | size = dataleft; | |
987 | ||
988 | nskb = alloc_skb(size, GFP_ATOMIC | GFP_DMA); | |
989 | if (!nskb) | |
990 | return -ENOMEM; | |
991 | ||
992 | memcpy(nskb->data, skb->data + copied, size); | |
993 | copied += size; | |
994 | dataleft -= size; | |
995 | ||
af7cd373 HC |
996 | skb_reset_transport_header(nskb); |
997 | skb_reset_network_header(nskb); | |
561e0360 JH |
998 | nskb->len = size; |
999 | ||
1000 | skb_queue_tail(fragmented_skb_q, nskb); | |
1001 | } | |
1002 | ||
1003 | return 0; | |
1004 | } | |
da99f056 | 1005 | |
eac3731b JH |
1006 | static void iucv_callback_rx(struct iucv_path *path, struct iucv_message *msg) |
1007 | { | |
1008 | struct sock *sk = path->private; | |
561e0360 JH |
1009 | struct iucv_sock *iucv = iucv_sk(sk); |
1010 | struct sk_buff *skb, *fskb; | |
1011 | struct sk_buff_head fragmented_skb_q; | |
eac3731b JH |
1012 | int rc; |
1013 | ||
561e0360 JH |
1014 | skb_queue_head_init(&fragmented_skb_q); |
1015 | ||
eac3731b JH |
1016 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
1017 | return; | |
1018 | ||
1019 | skb = alloc_skb(msg->length, GFP_ATOMIC | GFP_DMA); | |
1020 | if (!skb) { | |
561e0360 | 1021 | iucv_path_sever(path, NULL); |
eac3731b JH |
1022 | return; |
1023 | } | |
1024 | ||
1025 | if (msg->flags & IPRMDATA) { | |
1026 | skb->data = NULL; | |
1027 | skb->len = 0; | |
1028 | } else { | |
1029 | rc = iucv_message_receive(path, msg, 0, skb->data, | |
1030 | msg->length, NULL); | |
1031 | if (rc) { | |
1032 | kfree_skb(skb); | |
1033 | return; | |
1034 | } | |
561e0360 JH |
1035 | if (skb->truesize >= sk->sk_rcvbuf / 4) { |
1036 | rc = iucv_fragment_skb(sk, skb, msg->length, | |
1037 | &fragmented_skb_q); | |
1038 | kfree_skb(skb); | |
1039 | skb = NULL; | |
1040 | if (rc) { | |
1041 | iucv_path_sever(path, NULL); | |
1042 | return; | |
1043 | } | |
1044 | } else { | |
1045 | skb_reset_transport_header(skb); | |
1046 | skb_reset_network_header(skb); | |
1047 | skb->len = msg->length; | |
1048 | } | |
1049 | } | |
1050 | /* Queue the fragmented skb */ | |
1051 | fskb = skb_dequeue(&fragmented_skb_q); | |
da99f056 | 1052 | while (fskb) { |
561e0360 JH |
1053 | if (!skb_queue_empty(&iucv->backlog_skb_q)) |
1054 | skb_queue_tail(&iucv->backlog_skb_q, fskb); | |
1055 | else if (sock_queue_rcv_skb(sk, fskb)) | |
1056 | skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, fskb); | |
1057 | fskb = skb_dequeue(&fragmented_skb_q); | |
1058 | } | |
eac3731b | 1059 | |
561e0360 JH |
1060 | /* Queue the original skb if it exists (was not fragmented) */ |
1061 | if (skb) { | |
1062 | if (!skb_queue_empty(&iucv->backlog_skb_q)) | |
1063 | skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, skb); | |
1064 | else if (sock_queue_rcv_skb(sk, skb)) | |
1065 | skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, skb); | |
eac3731b JH |
1066 | } |
1067 | ||
eac3731b JH |
1068 | } |
1069 | ||
1070 | static void iucv_callback_txdone(struct iucv_path *path, | |
1071 | struct iucv_message *msg) | |
1072 | { | |
1073 | struct sock *sk = path->private; | |
1074 | struct sk_buff *this; | |
1075 | struct sk_buff_head *list = &iucv_sk(sk)->send_skb_q; | |
1076 | struct sk_buff *list_skb = list->next; | |
1077 | unsigned long flags; | |
1078 | ||
561e0360 JH |
1079 | if (list_skb) { |
1080 | spin_lock_irqsave(&list->lock, flags); | |
1081 | ||
1082 | do { | |
1083 | this = list_skb; | |
1084 | list_skb = list_skb->next; | |
1085 | } while (memcmp(&msg->tag, this->cb, 4) && list_skb); | |
1086 | ||
1087 | spin_unlock_irqrestore(&list->lock, flags); | |
eac3731b | 1088 | |
561e0360 JH |
1089 | skb_unlink(this, &iucv_sk(sk)->send_skb_q); |
1090 | kfree_skb(this); | |
1091 | } | |
eac3731b | 1092 | |
da99f056 | 1093 | if (sk->sk_state == IUCV_CLOSING) { |
561e0360 JH |
1094 | if (skb_queue_empty(&iucv_sk(sk)->send_skb_q)) { |
1095 | sk->sk_state = IUCV_CLOSED; | |
1096 | sk->sk_state_change(sk); | |
1097 | } | |
1098 | } | |
eac3731b | 1099 | |
eac3731b JH |
1100 | } |
1101 | ||
1102 | static void iucv_callback_connrej(struct iucv_path *path, u8 ipuser[16]) | |
1103 | { | |
1104 | struct sock *sk = path->private; | |
1105 | ||
1106 | if (!list_empty(&iucv_sk(sk)->accept_q)) | |
1107 | sk->sk_state = IUCV_SEVERED; | |
1108 | else | |
1109 | sk->sk_state = IUCV_DISCONN; | |
1110 | ||
1111 | sk->sk_state_change(sk); | |
1112 | } | |
1113 | ||
1114 | static struct proto_ops iucv_sock_ops = { | |
1115 | .family = PF_IUCV, | |
1116 | .owner = THIS_MODULE, | |
1117 | .release = iucv_sock_release, | |
1118 | .bind = iucv_sock_bind, | |
1119 | .connect = iucv_sock_connect, | |
1120 | .listen = iucv_sock_listen, | |
1121 | .accept = iucv_sock_accept, | |
1122 | .getname = iucv_sock_getname, | |
1123 | .sendmsg = iucv_sock_sendmsg, | |
1124 | .recvmsg = iucv_sock_recvmsg, | |
1125 | .poll = iucv_sock_poll, | |
1126 | .ioctl = sock_no_ioctl, | |
1127 | .mmap = sock_no_mmap, | |
1128 | .socketpair = sock_no_socketpair, | |
1129 | .shutdown = iucv_sock_shutdown, | |
1130 | .setsockopt = sock_no_setsockopt, | |
1131 | .getsockopt = sock_no_getsockopt | |
1132 | }; | |
1133 | ||
1134 | static struct net_proto_family iucv_sock_family_ops = { | |
1135 | .family = AF_IUCV, | |
1136 | .owner = THIS_MODULE, | |
1137 | .create = iucv_sock_create, | |
1138 | }; | |
1139 | ||
da99f056 | 1140 | static int __init afiucv_init(void) |
eac3731b JH |
1141 | { |
1142 | int err; | |
1143 | ||
1144 | if (!MACHINE_IS_VM) { | |
1145 | printk(KERN_ERR "AF_IUCV connection needs VM as base\n"); | |
1146 | err = -EPROTONOSUPPORT; | |
1147 | goto out; | |
1148 | } | |
1149 | cpcmd("QUERY USERID", iucv_userid, sizeof(iucv_userid), &err); | |
1150 | if (unlikely(err)) { | |
1151 | printk(KERN_ERR "AF_IUCV needs the VM userid\n"); | |
1152 | err = -EPROTONOSUPPORT; | |
1153 | goto out; | |
1154 | } | |
1155 | ||
1156 | err = iucv_register(&af_iucv_handler, 0); | |
1157 | if (err) | |
1158 | goto out; | |
1159 | err = proto_register(&iucv_proto, 0); | |
1160 | if (err) | |
1161 | goto out_iucv; | |
1162 | err = sock_register(&iucv_sock_family_ops); | |
1163 | if (err) | |
1164 | goto out_proto; | |
1165 | printk(KERN_INFO "AF_IUCV lowlevel driver initialized\n"); | |
1166 | return 0; | |
1167 | ||
1168 | out_proto: | |
1169 | proto_unregister(&iucv_proto); | |
1170 | out_iucv: | |
1171 | iucv_unregister(&af_iucv_handler, 0); | |
1172 | out: | |
1173 | return err; | |
1174 | } | |
1175 | ||
1176 | static void __exit afiucv_exit(void) | |
1177 | { | |
1178 | sock_unregister(PF_IUCV); | |
1179 | proto_unregister(&iucv_proto); | |
1180 | iucv_unregister(&af_iucv_handler, 0); | |
1181 | ||
1182 | printk(KERN_INFO "AF_IUCV lowlevel driver unloaded\n"); | |
1183 | } | |
1184 | ||
1185 | module_init(afiucv_init); | |
1186 | module_exit(afiucv_exit); | |
1187 | ||
1188 | MODULE_AUTHOR("Jennifer Hunt <jenhunt@us.ibm.com>"); | |
1189 | MODULE_DESCRIPTION("IUCV Sockets ver " VERSION); | |
1190 | MODULE_VERSION(VERSION); | |
1191 | MODULE_LICENSE("GPL"); | |
1192 | MODULE_ALIAS_NETPROTO(PF_IUCV); |