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Commit | Line | Data |
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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 | ||
57f20448 HC |
44 | static void iucv_sock_kill(struct sock *sk); |
45 | static void iucv_sock_close(struct sock *sk); | |
46 | ||
eac3731b JH |
47 | /* Call Back functions */ |
48 | static void iucv_callback_rx(struct iucv_path *, struct iucv_message *); | |
49 | static void iucv_callback_txdone(struct iucv_path *, struct iucv_message *); | |
50 | static void iucv_callback_connack(struct iucv_path *, u8 ipuser[16]); | |
da99f056 HC |
51 | static int iucv_callback_connreq(struct iucv_path *, u8 ipvmid[8], |
52 | u8 ipuser[16]); | |
eac3731b JH |
53 | static void iucv_callback_connrej(struct iucv_path *, u8 ipuser[16]); |
54 | ||
55 | static struct iucv_sock_list iucv_sk_list = { | |
56 | .lock = RW_LOCK_UNLOCKED, | |
57 | .autobind_name = ATOMIC_INIT(0) | |
58 | }; | |
59 | ||
60 | static struct iucv_handler af_iucv_handler = { | |
61 | .path_pending = iucv_callback_connreq, | |
62 | .path_complete = iucv_callback_connack, | |
63 | .path_severed = iucv_callback_connrej, | |
64 | .message_pending = iucv_callback_rx, | |
65 | .message_complete = iucv_callback_txdone | |
66 | }; | |
67 | ||
68 | static inline void high_nmcpy(unsigned char *dst, char *src) | |
69 | { | |
70 | memcpy(dst, src, 8); | |
71 | } | |
72 | ||
73 | static inline void low_nmcpy(unsigned char *dst, char *src) | |
74 | { | |
75 | memcpy(&dst[8], src, 8); | |
76 | } | |
77 | ||
78 | /* Timers */ | |
79 | static void iucv_sock_timeout(unsigned long arg) | |
80 | { | |
81 | struct sock *sk = (struct sock *)arg; | |
82 | ||
83 | bh_lock_sock(sk); | |
84 | sk->sk_err = ETIMEDOUT; | |
85 | sk->sk_state_change(sk); | |
86 | bh_unlock_sock(sk); | |
87 | ||
88 | iucv_sock_kill(sk); | |
89 | sock_put(sk); | |
90 | } | |
91 | ||
92 | static void iucv_sock_clear_timer(struct sock *sk) | |
93 | { | |
94 | sk_stop_timer(sk, &sk->sk_timer); | |
95 | } | |
96 | ||
eac3731b JH |
97 | static struct sock *__iucv_get_sock_by_name(char *nm) |
98 | { | |
99 | struct sock *sk; | |
100 | struct hlist_node *node; | |
101 | ||
102 | sk_for_each(sk, node, &iucv_sk_list.head) | |
103 | if (!memcmp(&iucv_sk(sk)->src_name, nm, 8)) | |
104 | return sk; | |
105 | ||
106 | return NULL; | |
107 | } | |
108 | ||
109 | static void iucv_sock_destruct(struct sock *sk) | |
110 | { | |
111 | skb_queue_purge(&sk->sk_receive_queue); | |
112 | skb_queue_purge(&sk->sk_write_queue); | |
113 | } | |
114 | ||
115 | /* Cleanup Listen */ | |
116 | static void iucv_sock_cleanup_listen(struct sock *parent) | |
117 | { | |
118 | struct sock *sk; | |
119 | ||
120 | /* Close non-accepted connections */ | |
121 | while ((sk = iucv_accept_dequeue(parent, NULL))) { | |
122 | iucv_sock_close(sk); | |
123 | iucv_sock_kill(sk); | |
124 | } | |
125 | ||
126 | parent->sk_state = IUCV_CLOSED; | |
127 | sock_set_flag(parent, SOCK_ZAPPED); | |
128 | } | |
129 | ||
130 | /* Kill socket */ | |
131 | static void iucv_sock_kill(struct sock *sk) | |
132 | { | |
133 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
134 | return; | |
135 | ||
136 | iucv_sock_unlink(&iucv_sk_list, sk); | |
137 | sock_set_flag(sk, SOCK_DEAD); | |
138 | sock_put(sk); | |
139 | } | |
140 | ||
141 | /* Close an IUCV socket */ | |
142 | static void iucv_sock_close(struct sock *sk) | |
143 | { | |
144 | unsigned char user_data[16]; | |
145 | struct iucv_sock *iucv = iucv_sk(sk); | |
146 | int err; | |
561e0360 | 147 | unsigned long timeo; |
eac3731b JH |
148 | |
149 | iucv_sock_clear_timer(sk); | |
150 | lock_sock(sk); | |
151 | ||
da99f056 | 152 | switch (sk->sk_state) { |
eac3731b JH |
153 | case IUCV_LISTEN: |
154 | iucv_sock_cleanup_listen(sk); | |
155 | break; | |
156 | ||
157 | case IUCV_CONNECTED: | |
158 | case IUCV_DISCONN: | |
159 | err = 0; | |
561e0360 JH |
160 | |
161 | sk->sk_state = IUCV_CLOSING; | |
162 | sk->sk_state_change(sk); | |
163 | ||
da99f056 | 164 | if (!skb_queue_empty(&iucv->send_skb_q)) { |
561e0360 JH |
165 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) |
166 | timeo = sk->sk_lingertime; | |
167 | else | |
168 | timeo = IUCV_DISCONN_TIMEOUT; | |
169 | err = iucv_sock_wait_state(sk, IUCV_CLOSED, 0, timeo); | |
170 | } | |
171 | ||
172 | sk->sk_state = IUCV_CLOSED; | |
173 | sk->sk_state_change(sk); | |
174 | ||
eac3731b JH |
175 | if (iucv->path) { |
176 | low_nmcpy(user_data, iucv->src_name); | |
177 | high_nmcpy(user_data, iucv->dst_name); | |
178 | ASCEBC(user_data, sizeof(user_data)); | |
179 | err = iucv_path_sever(iucv->path, user_data); | |
180 | iucv_path_free(iucv->path); | |
181 | iucv->path = NULL; | |
182 | } | |
183 | ||
eac3731b JH |
184 | sk->sk_err = ECONNRESET; |
185 | sk->sk_state_change(sk); | |
186 | ||
187 | skb_queue_purge(&iucv->send_skb_q); | |
561e0360 | 188 | skb_queue_purge(&iucv->backlog_skb_q); |
eac3731b JH |
189 | |
190 | sock_set_flag(sk, SOCK_ZAPPED); | |
191 | break; | |
192 | ||
193 | default: | |
194 | sock_set_flag(sk, SOCK_ZAPPED); | |
195 | break; | |
3ff50b79 | 196 | } |
eac3731b JH |
197 | |
198 | release_sock(sk); | |
199 | iucv_sock_kill(sk); | |
200 | } | |
201 | ||
202 | static void iucv_sock_init(struct sock *sk, struct sock *parent) | |
203 | { | |
204 | if (parent) | |
205 | sk->sk_type = parent->sk_type; | |
206 | } | |
207 | ||
208 | static struct sock *iucv_sock_alloc(struct socket *sock, int proto, gfp_t prio) | |
209 | { | |
210 | struct sock *sk; | |
211 | ||
6257ff21 | 212 | sk = sk_alloc(&init_net, PF_IUCV, prio, &iucv_proto); |
eac3731b JH |
213 | if (!sk) |
214 | return NULL; | |
215 | ||
216 | sock_init_data(sock, sk); | |
217 | INIT_LIST_HEAD(&iucv_sk(sk)->accept_q); | |
febca281 | 218 | spin_lock_init(&iucv_sk(sk)->accept_q_lock); |
eac3731b | 219 | skb_queue_head_init(&iucv_sk(sk)->send_skb_q); |
f0703c80 UB |
220 | INIT_LIST_HEAD(&iucv_sk(sk)->message_q.list); |
221 | spin_lock_init(&iucv_sk(sk)->message_q.lock); | |
561e0360 | 222 | skb_queue_head_init(&iucv_sk(sk)->backlog_skb_q); |
eac3731b JH |
223 | iucv_sk(sk)->send_tag = 0; |
224 | ||
225 | sk->sk_destruct = iucv_sock_destruct; | |
226 | sk->sk_sndtimeo = IUCV_CONN_TIMEOUT; | |
227 | sk->sk_allocation = GFP_DMA; | |
228 | ||
229 | sock_reset_flag(sk, SOCK_ZAPPED); | |
230 | ||
231 | sk->sk_protocol = proto; | |
232 | sk->sk_state = IUCV_OPEN; | |
233 | ||
b24b8a24 | 234 | setup_timer(&sk->sk_timer, iucv_sock_timeout, (unsigned long)sk); |
eac3731b JH |
235 | |
236 | iucv_sock_link(&iucv_sk_list, sk); | |
237 | return sk; | |
238 | } | |
239 | ||
240 | /* Create an IUCV socket */ | |
1b8d7ae4 | 241 | static int iucv_sock_create(struct net *net, struct socket *sock, int protocol) |
eac3731b JH |
242 | { |
243 | struct sock *sk; | |
244 | ||
245 | if (sock->type != SOCK_STREAM) | |
246 | return -ESOCKTNOSUPPORT; | |
247 | ||
248 | sock->state = SS_UNCONNECTED; | |
249 | sock->ops = &iucv_sock_ops; | |
250 | ||
251 | sk = iucv_sock_alloc(sock, protocol, GFP_KERNEL); | |
252 | if (!sk) | |
253 | return -ENOMEM; | |
254 | ||
255 | iucv_sock_init(sk, NULL); | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
260 | void iucv_sock_link(struct iucv_sock_list *l, struct sock *sk) | |
261 | { | |
262 | write_lock_bh(&l->lock); | |
263 | sk_add_node(sk, &l->head); | |
264 | write_unlock_bh(&l->lock); | |
265 | } | |
266 | ||
267 | void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *sk) | |
268 | { | |
269 | write_lock_bh(&l->lock); | |
270 | sk_del_node_init(sk); | |
271 | write_unlock_bh(&l->lock); | |
272 | } | |
273 | ||
274 | void iucv_accept_enqueue(struct sock *parent, struct sock *sk) | |
275 | { | |
febca281 UB |
276 | unsigned long flags; |
277 | struct iucv_sock *par = iucv_sk(parent); | |
278 | ||
eac3731b | 279 | sock_hold(sk); |
febca281 UB |
280 | spin_lock_irqsave(&par->accept_q_lock, flags); |
281 | list_add_tail(&iucv_sk(sk)->accept_q, &par->accept_q); | |
282 | spin_unlock_irqrestore(&par->accept_q_lock, flags); | |
eac3731b JH |
283 | iucv_sk(sk)->parent = parent; |
284 | parent->sk_ack_backlog++; | |
285 | } | |
286 | ||
287 | void iucv_accept_unlink(struct sock *sk) | |
288 | { | |
febca281 UB |
289 | unsigned long flags; |
290 | struct iucv_sock *par = iucv_sk(iucv_sk(sk)->parent); | |
291 | ||
292 | spin_lock_irqsave(&par->accept_q_lock, flags); | |
eac3731b | 293 | list_del_init(&iucv_sk(sk)->accept_q); |
febca281 | 294 | spin_unlock_irqrestore(&par->accept_q_lock, flags); |
eac3731b JH |
295 | iucv_sk(sk)->parent->sk_ack_backlog--; |
296 | iucv_sk(sk)->parent = NULL; | |
297 | sock_put(sk); | |
298 | } | |
299 | ||
300 | struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock) | |
301 | { | |
302 | struct iucv_sock *isk, *n; | |
303 | struct sock *sk; | |
304 | ||
da99f056 | 305 | list_for_each_entry_safe(isk, n, &iucv_sk(parent)->accept_q, accept_q) { |
eac3731b JH |
306 | sk = (struct sock *) isk; |
307 | lock_sock(sk); | |
308 | ||
309 | if (sk->sk_state == IUCV_CLOSED) { | |
eac3731b | 310 | iucv_accept_unlink(sk); |
febca281 | 311 | release_sock(sk); |
eac3731b JH |
312 | continue; |
313 | } | |
314 | ||
315 | if (sk->sk_state == IUCV_CONNECTED || | |
316 | sk->sk_state == IUCV_SEVERED || | |
317 | !newsock) { | |
318 | iucv_accept_unlink(sk); | |
319 | if (newsock) | |
320 | sock_graft(sk, newsock); | |
321 | ||
322 | if (sk->sk_state == IUCV_SEVERED) | |
323 | sk->sk_state = IUCV_DISCONN; | |
324 | ||
325 | release_sock(sk); | |
326 | return sk; | |
327 | } | |
328 | ||
329 | release_sock(sk); | |
330 | } | |
331 | return NULL; | |
332 | } | |
333 | ||
334 | int iucv_sock_wait_state(struct sock *sk, int state, int state2, | |
335 | unsigned long timeo) | |
336 | { | |
337 | DECLARE_WAITQUEUE(wait, current); | |
338 | int err = 0; | |
339 | ||
340 | add_wait_queue(sk->sk_sleep, &wait); | |
341 | while (sk->sk_state != state && sk->sk_state != state2) { | |
342 | set_current_state(TASK_INTERRUPTIBLE); | |
343 | ||
344 | if (!timeo) { | |
345 | err = -EAGAIN; | |
346 | break; | |
347 | } | |
348 | ||
349 | if (signal_pending(current)) { | |
350 | err = sock_intr_errno(timeo); | |
351 | break; | |
352 | } | |
353 | ||
354 | release_sock(sk); | |
355 | timeo = schedule_timeout(timeo); | |
356 | lock_sock(sk); | |
357 | ||
358 | err = sock_error(sk); | |
359 | if (err) | |
360 | break; | |
361 | } | |
362 | set_current_state(TASK_RUNNING); | |
363 | remove_wait_queue(sk->sk_sleep, &wait); | |
364 | return err; | |
365 | } | |
366 | ||
367 | /* Bind an unbound socket */ | |
368 | static int iucv_sock_bind(struct socket *sock, struct sockaddr *addr, | |
369 | int addr_len) | |
370 | { | |
371 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
372 | struct sock *sk = sock->sk; | |
373 | struct iucv_sock *iucv; | |
374 | int err; | |
375 | ||
376 | /* Verify the input sockaddr */ | |
377 | if (!addr || addr->sa_family != AF_IUCV) | |
378 | return -EINVAL; | |
379 | ||
380 | lock_sock(sk); | |
381 | if (sk->sk_state != IUCV_OPEN) { | |
382 | err = -EBADFD; | |
383 | goto done; | |
384 | } | |
385 | ||
386 | write_lock_bh(&iucv_sk_list.lock); | |
387 | ||
388 | iucv = iucv_sk(sk); | |
389 | if (__iucv_get_sock_by_name(sa->siucv_name)) { | |
390 | err = -EADDRINUSE; | |
391 | goto done_unlock; | |
392 | } | |
393 | if (iucv->path) { | |
394 | err = 0; | |
395 | goto done_unlock; | |
396 | } | |
397 | ||
398 | /* Bind the socket */ | |
399 | memcpy(iucv->src_name, sa->siucv_name, 8); | |
400 | ||
401 | /* Copy the user id */ | |
402 | memcpy(iucv->src_user_id, iucv_userid, 8); | |
403 | sk->sk_state = IUCV_BOUND; | |
404 | err = 0; | |
405 | ||
406 | done_unlock: | |
407 | /* Release the socket list lock */ | |
408 | write_unlock_bh(&iucv_sk_list.lock); | |
409 | done: | |
410 | release_sock(sk); | |
411 | return err; | |
412 | } | |
413 | ||
414 | /* Automatically bind an unbound socket */ | |
415 | static int iucv_sock_autobind(struct sock *sk) | |
416 | { | |
417 | struct iucv_sock *iucv = iucv_sk(sk); | |
418 | char query_buffer[80]; | |
419 | char name[12]; | |
420 | int err = 0; | |
421 | ||
422 | /* Set the userid and name */ | |
423 | cpcmd("QUERY USERID", query_buffer, sizeof(query_buffer), &err); | |
424 | if (unlikely(err)) | |
425 | return -EPROTO; | |
426 | ||
427 | memcpy(iucv->src_user_id, query_buffer, 8); | |
428 | ||
429 | write_lock_bh(&iucv_sk_list.lock); | |
430 | ||
431 | sprintf(name, "%08x", atomic_inc_return(&iucv_sk_list.autobind_name)); | |
432 | while (__iucv_get_sock_by_name(name)) { | |
433 | sprintf(name, "%08x", | |
434 | atomic_inc_return(&iucv_sk_list.autobind_name)); | |
435 | } | |
436 | ||
437 | write_unlock_bh(&iucv_sk_list.lock); | |
438 | ||
439 | memcpy(&iucv->src_name, name, 8); | |
440 | ||
441 | return err; | |
442 | } | |
443 | ||
444 | /* Connect an unconnected socket */ | |
445 | static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr, | |
446 | int alen, int flags) | |
447 | { | |
448 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
449 | struct sock *sk = sock->sk; | |
450 | struct iucv_sock *iucv; | |
451 | unsigned char user_data[16]; | |
452 | int err; | |
453 | ||
454 | if (addr->sa_family != AF_IUCV || alen < sizeof(struct sockaddr_iucv)) | |
455 | return -EINVAL; | |
456 | ||
457 | if (sk->sk_state != IUCV_OPEN && sk->sk_state != IUCV_BOUND) | |
458 | return -EBADFD; | |
459 | ||
460 | if (sk->sk_type != SOCK_STREAM) | |
461 | return -EINVAL; | |
462 | ||
463 | iucv = iucv_sk(sk); | |
464 | ||
465 | if (sk->sk_state == IUCV_OPEN) { | |
466 | err = iucv_sock_autobind(sk); | |
467 | if (unlikely(err)) | |
468 | return err; | |
469 | } | |
470 | ||
471 | lock_sock(sk); | |
472 | ||
473 | /* Set the destination information */ | |
474 | memcpy(iucv_sk(sk)->dst_user_id, sa->siucv_user_id, 8); | |
475 | memcpy(iucv_sk(sk)->dst_name, sa->siucv_name, 8); | |
476 | ||
477 | high_nmcpy(user_data, sa->siucv_name); | |
478 | low_nmcpy(user_data, iucv_sk(sk)->src_name); | |
479 | ASCEBC(user_data, sizeof(user_data)); | |
480 | ||
481 | iucv = iucv_sk(sk); | |
482 | /* Create path. */ | |
483 | iucv->path = iucv_path_alloc(IUCV_QUEUELEN_DEFAULT, | |
484 | IPRMDATA, GFP_KERNEL); | |
485 | err = iucv_path_connect(iucv->path, &af_iucv_handler, | |
486 | sa->siucv_user_id, NULL, user_data, sk); | |
487 | if (err) { | |
488 | iucv_path_free(iucv->path); | |
489 | iucv->path = NULL; | |
490 | err = -ECONNREFUSED; | |
491 | goto done; | |
492 | } | |
493 | ||
494 | if (sk->sk_state != IUCV_CONNECTED) { | |
495 | err = iucv_sock_wait_state(sk, IUCV_CONNECTED, IUCV_DISCONN, | |
496 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
497 | } | |
498 | ||
499 | if (sk->sk_state == IUCV_DISCONN) { | |
500 | release_sock(sk); | |
501 | return -ECONNREFUSED; | |
502 | } | |
503 | done: | |
504 | release_sock(sk); | |
505 | return err; | |
506 | } | |
507 | ||
508 | /* Move a socket into listening state. */ | |
509 | static int iucv_sock_listen(struct socket *sock, int backlog) | |
510 | { | |
511 | struct sock *sk = sock->sk; | |
512 | int err; | |
513 | ||
514 | lock_sock(sk); | |
515 | ||
516 | err = -EINVAL; | |
517 | if (sk->sk_state != IUCV_BOUND || sock->type != SOCK_STREAM) | |
518 | goto done; | |
519 | ||
520 | sk->sk_max_ack_backlog = backlog; | |
521 | sk->sk_ack_backlog = 0; | |
522 | sk->sk_state = IUCV_LISTEN; | |
523 | err = 0; | |
524 | ||
525 | done: | |
526 | release_sock(sk); | |
527 | return err; | |
528 | } | |
529 | ||
530 | /* Accept a pending connection */ | |
531 | static int iucv_sock_accept(struct socket *sock, struct socket *newsock, | |
532 | int flags) | |
533 | { | |
534 | DECLARE_WAITQUEUE(wait, current); | |
535 | struct sock *sk = sock->sk, *nsk; | |
536 | long timeo; | |
537 | int err = 0; | |
538 | ||
561e0360 | 539 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
eac3731b JH |
540 | |
541 | if (sk->sk_state != IUCV_LISTEN) { | |
542 | err = -EBADFD; | |
543 | goto done; | |
544 | } | |
545 | ||
546 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
547 | ||
548 | /* Wait for an incoming connection */ | |
549 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
da99f056 | 550 | while (!(nsk = iucv_accept_dequeue(sk, newsock))) { |
eac3731b JH |
551 | set_current_state(TASK_INTERRUPTIBLE); |
552 | if (!timeo) { | |
553 | err = -EAGAIN; | |
554 | break; | |
555 | } | |
556 | ||
557 | release_sock(sk); | |
558 | timeo = schedule_timeout(timeo); | |
561e0360 | 559 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
eac3731b JH |
560 | |
561 | if (sk->sk_state != IUCV_LISTEN) { | |
562 | err = -EBADFD; | |
563 | break; | |
564 | } | |
565 | ||
566 | if (signal_pending(current)) { | |
567 | err = sock_intr_errno(timeo); | |
568 | break; | |
569 | } | |
570 | } | |
571 | ||
572 | set_current_state(TASK_RUNNING); | |
573 | remove_wait_queue(sk->sk_sleep, &wait); | |
574 | ||
575 | if (err) | |
576 | goto done; | |
577 | ||
578 | newsock->state = SS_CONNECTED; | |
579 | ||
580 | done: | |
581 | release_sock(sk); | |
582 | return err; | |
583 | } | |
584 | ||
585 | static int iucv_sock_getname(struct socket *sock, struct sockaddr *addr, | |
586 | int *len, int peer) | |
587 | { | |
588 | struct sockaddr_iucv *siucv = (struct sockaddr_iucv *) addr; | |
589 | struct sock *sk = sock->sk; | |
590 | ||
591 | addr->sa_family = AF_IUCV; | |
592 | *len = sizeof(struct sockaddr_iucv); | |
593 | ||
594 | if (peer) { | |
595 | memcpy(siucv->siucv_user_id, iucv_sk(sk)->dst_user_id, 8); | |
596 | memcpy(siucv->siucv_name, &iucv_sk(sk)->dst_name, 8); | |
597 | } else { | |
598 | memcpy(siucv->siucv_user_id, iucv_sk(sk)->src_user_id, 8); | |
599 | memcpy(siucv->siucv_name, iucv_sk(sk)->src_name, 8); | |
600 | } | |
601 | memset(&siucv->siucv_port, 0, sizeof(siucv->siucv_port)); | |
602 | memset(&siucv->siucv_addr, 0, sizeof(siucv->siucv_addr)); | |
603 | memset(siucv->siucv_nodeid, 0, sizeof(siucv->siucv_nodeid)); | |
604 | ||
605 | return 0; | |
606 | } | |
607 | ||
608 | static int iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock, | |
609 | struct msghdr *msg, size_t len) | |
610 | { | |
611 | struct sock *sk = sock->sk; | |
612 | struct iucv_sock *iucv = iucv_sk(sk); | |
613 | struct sk_buff *skb; | |
614 | struct iucv_message txmsg; | |
615 | int err; | |
616 | ||
617 | err = sock_error(sk); | |
618 | if (err) | |
619 | return err; | |
620 | ||
621 | if (msg->msg_flags & MSG_OOB) | |
622 | return -EOPNOTSUPP; | |
623 | ||
624 | lock_sock(sk); | |
625 | ||
626 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
627 | err = -EPIPE; | |
628 | goto out; | |
629 | } | |
630 | ||
da99f056 HC |
631 | if (sk->sk_state == IUCV_CONNECTED) { |
632 | if (!(skb = sock_alloc_send_skb(sk, len, | |
633 | msg->msg_flags & MSG_DONTWAIT, | |
634 | &err))) | |
561e0360 | 635 | goto out; |
eac3731b | 636 | |
da99f056 | 637 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { |
eac3731b JH |
638 | err = -EFAULT; |
639 | goto fail; | |
640 | } | |
641 | ||
642 | txmsg.class = 0; | |
643 | txmsg.tag = iucv->send_tag++; | |
644 | memcpy(skb->cb, &txmsg.tag, 4); | |
645 | skb_queue_tail(&iucv->send_skb_q, skb); | |
646 | err = iucv_message_send(iucv->path, &txmsg, 0, 0, | |
647 | (void *) skb->data, skb->len); | |
648 | if (err) { | |
649 | if (err == 3) | |
650 | printk(KERN_ERR "AF_IUCV msg limit exceeded\n"); | |
651 | skb_unlink(skb, &iucv->send_skb_q); | |
652 | err = -EPIPE; | |
653 | goto fail; | |
654 | } | |
655 | ||
656 | } else { | |
657 | err = -ENOTCONN; | |
658 | goto out; | |
659 | } | |
660 | ||
661 | release_sock(sk); | |
662 | return len; | |
663 | ||
664 | fail: | |
665 | kfree_skb(skb); | |
666 | out: | |
667 | release_sock(sk); | |
668 | return err; | |
669 | } | |
670 | ||
f0703c80 UB |
671 | static int iucv_fragment_skb(struct sock *sk, struct sk_buff *skb, int len) |
672 | { | |
673 | int dataleft, size, copied = 0; | |
674 | struct sk_buff *nskb; | |
675 | ||
676 | dataleft = len; | |
677 | while (dataleft) { | |
678 | if (dataleft >= sk->sk_rcvbuf / 4) | |
679 | size = sk->sk_rcvbuf / 4; | |
680 | else | |
681 | size = dataleft; | |
682 | ||
683 | nskb = alloc_skb(size, GFP_ATOMIC | GFP_DMA); | |
684 | if (!nskb) | |
685 | return -ENOMEM; | |
686 | ||
687 | memcpy(nskb->data, skb->data + copied, size); | |
688 | copied += size; | |
689 | dataleft -= size; | |
690 | ||
691 | skb_reset_transport_header(nskb); | |
692 | skb_reset_network_header(nskb); | |
693 | nskb->len = size; | |
694 | ||
695 | skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, nskb); | |
696 | } | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
701 | static void iucv_process_message(struct sock *sk, struct sk_buff *skb, | |
702 | struct iucv_path *path, | |
703 | struct iucv_message *msg) | |
704 | { | |
705 | int rc; | |
706 | ||
707 | if (msg->flags & IPRMDATA) { | |
708 | skb->data = NULL; | |
709 | skb->len = 0; | |
710 | } else { | |
711 | rc = iucv_message_receive(path, msg, 0, skb->data, | |
712 | msg->length, NULL); | |
713 | if (rc) { | |
714 | kfree_skb(skb); | |
715 | return; | |
716 | } | |
717 | if (skb->truesize >= sk->sk_rcvbuf / 4) { | |
718 | rc = iucv_fragment_skb(sk, skb, msg->length); | |
719 | kfree_skb(skb); | |
720 | skb = NULL; | |
721 | if (rc) { | |
722 | iucv_path_sever(path, NULL); | |
723 | return; | |
724 | } | |
725 | skb = skb_dequeue(&iucv_sk(sk)->backlog_skb_q); | |
726 | } else { | |
727 | skb_reset_transport_header(skb); | |
728 | skb_reset_network_header(skb); | |
729 | skb->len = msg->length; | |
730 | } | |
731 | } | |
732 | ||
733 | if (sock_queue_rcv_skb(sk, skb)) | |
734 | skb_queue_head(&iucv_sk(sk)->backlog_skb_q, skb); | |
735 | } | |
736 | ||
737 | static void iucv_process_message_q(struct sock *sk) | |
738 | { | |
739 | struct iucv_sock *iucv = iucv_sk(sk); | |
740 | struct sk_buff *skb; | |
741 | struct sock_msg_q *p, *n; | |
742 | ||
743 | list_for_each_entry_safe(p, n, &iucv->message_q.list, list) { | |
744 | skb = alloc_skb(p->msg.length, GFP_ATOMIC | GFP_DMA); | |
745 | if (!skb) | |
746 | break; | |
747 | iucv_process_message(sk, skb, p->path, &p->msg); | |
748 | list_del(&p->list); | |
749 | kfree(p); | |
750 | if (!skb_queue_empty(&iucv->backlog_skb_q)) | |
751 | break; | |
752 | } | |
753 | } | |
754 | ||
eac3731b JH |
755 | static int iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
756 | struct msghdr *msg, size_t len, int flags) | |
757 | { | |
758 | int noblock = flags & MSG_DONTWAIT; | |
759 | struct sock *sk = sock->sk; | |
561e0360 | 760 | struct iucv_sock *iucv = iucv_sk(sk); |
eac3731b | 761 | int target, copied = 0; |
561e0360 | 762 | struct sk_buff *skb, *rskb, *cskb; |
eac3731b JH |
763 | int err = 0; |
764 | ||
561e0360 | 765 | if ((sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_SEVERED) && |
f0703c80 UB |
766 | skb_queue_empty(&iucv->backlog_skb_q) && |
767 | skb_queue_empty(&sk->sk_receive_queue) && | |
768 | list_empty(&iucv->message_q.list)) | |
561e0360 JH |
769 | return 0; |
770 | ||
eac3731b JH |
771 | if (flags & (MSG_OOB)) |
772 | return -EOPNOTSUPP; | |
773 | ||
774 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, len); | |
775 | ||
776 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
777 | if (!skb) { | |
778 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
779 | return 0; | |
780 | return err; | |
781 | } | |
782 | ||
783 | copied = min_t(unsigned int, skb->len, len); | |
784 | ||
561e0360 JH |
785 | cskb = skb; |
786 | if (memcpy_toiovec(msg->msg_iov, cskb->data, copied)) { | |
eac3731b JH |
787 | skb_queue_head(&sk->sk_receive_queue, skb); |
788 | if (copied == 0) | |
789 | return -EFAULT; | |
561e0360 | 790 | goto done; |
eac3731b JH |
791 | } |
792 | ||
793 | len -= copied; | |
794 | ||
795 | /* Mark read part of skb as used */ | |
796 | if (!(flags & MSG_PEEK)) { | |
797 | skb_pull(skb, copied); | |
798 | ||
799 | if (skb->len) { | |
800 | skb_queue_head(&sk->sk_receive_queue, skb); | |
801 | goto done; | |
802 | } | |
803 | ||
804 | kfree_skb(skb); | |
561e0360 JH |
805 | |
806 | /* Queue backlog skbs */ | |
f0703c80 | 807 | rskb = skb_dequeue(&iucv->backlog_skb_q); |
da99f056 | 808 | while (rskb) { |
561e0360 | 809 | if (sock_queue_rcv_skb(sk, rskb)) { |
f0703c80 | 810 | skb_queue_head(&iucv->backlog_skb_q, |
561e0360 JH |
811 | rskb); |
812 | break; | |
813 | } else { | |
f0703c80 | 814 | rskb = skb_dequeue(&iucv->backlog_skb_q); |
561e0360 JH |
815 | } |
816 | } | |
f0703c80 UB |
817 | if (skb_queue_empty(&iucv->backlog_skb_q)) { |
818 | spin_lock_bh(&iucv->message_q.lock); | |
819 | if (!list_empty(&iucv->message_q.list)) | |
820 | iucv_process_message_q(sk); | |
821 | spin_unlock_bh(&iucv->message_q.lock); | |
822 | } | |
823 | ||
eac3731b JH |
824 | } else |
825 | skb_queue_head(&sk->sk_receive_queue, skb); | |
826 | ||
827 | done: | |
828 | return err ? : copied; | |
829 | } | |
830 | ||
831 | static inline unsigned int iucv_accept_poll(struct sock *parent) | |
832 | { | |
833 | struct iucv_sock *isk, *n; | |
834 | struct sock *sk; | |
835 | ||
da99f056 | 836 | list_for_each_entry_safe(isk, n, &iucv_sk(parent)->accept_q, accept_q) { |
eac3731b JH |
837 | sk = (struct sock *) isk; |
838 | ||
839 | if (sk->sk_state == IUCV_CONNECTED) | |
840 | return POLLIN | POLLRDNORM; | |
841 | } | |
842 | ||
843 | return 0; | |
844 | } | |
845 | ||
846 | unsigned int iucv_sock_poll(struct file *file, struct socket *sock, | |
847 | poll_table *wait) | |
848 | { | |
849 | struct sock *sk = sock->sk; | |
850 | unsigned int mask = 0; | |
851 | ||
852 | poll_wait(file, sk->sk_sleep, wait); | |
853 | ||
854 | if (sk->sk_state == IUCV_LISTEN) | |
855 | return iucv_accept_poll(sk); | |
856 | ||
857 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
858 | mask |= POLLERR; | |
859 | ||
860 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
861 | mask |= POLLRDHUP; | |
862 | ||
863 | if (sk->sk_shutdown == SHUTDOWN_MASK) | |
864 | mask |= POLLHUP; | |
865 | ||
866 | if (!skb_queue_empty(&sk->sk_receive_queue) || | |
da99f056 | 867 | (sk->sk_shutdown & RCV_SHUTDOWN)) |
eac3731b JH |
868 | mask |= POLLIN | POLLRDNORM; |
869 | ||
870 | if (sk->sk_state == IUCV_CLOSED) | |
871 | mask |= POLLHUP; | |
872 | ||
561e0360 JH |
873 | if (sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_SEVERED) |
874 | mask |= POLLIN; | |
875 | ||
eac3731b JH |
876 | if (sock_writeable(sk)) |
877 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; | |
878 | else | |
879 | set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); | |
880 | ||
881 | return mask; | |
882 | } | |
883 | ||
884 | static int iucv_sock_shutdown(struct socket *sock, int how) | |
885 | { | |
886 | struct sock *sk = sock->sk; | |
887 | struct iucv_sock *iucv = iucv_sk(sk); | |
888 | struct iucv_message txmsg; | |
889 | int err = 0; | |
890 | u8 prmmsg[8] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}; | |
891 | ||
892 | how++; | |
893 | ||
894 | if ((how & ~SHUTDOWN_MASK) || !how) | |
895 | return -EINVAL; | |
896 | ||
897 | lock_sock(sk); | |
da99f056 | 898 | switch (sk->sk_state) { |
eac3731b JH |
899 | case IUCV_CLOSED: |
900 | err = -ENOTCONN; | |
901 | goto fail; | |
902 | ||
903 | default: | |
904 | sk->sk_shutdown |= how; | |
905 | break; | |
906 | } | |
907 | ||
908 | if (how == SEND_SHUTDOWN || how == SHUTDOWN_MASK) { | |
909 | txmsg.class = 0; | |
910 | txmsg.tag = 0; | |
911 | err = iucv_message_send(iucv->path, &txmsg, IUCV_IPRMDATA, 0, | |
912 | (void *) prmmsg, 8); | |
913 | if (err) { | |
da99f056 | 914 | switch (err) { |
eac3731b JH |
915 | case 1: |
916 | err = -ENOTCONN; | |
917 | break; | |
918 | case 2: | |
919 | err = -ECONNRESET; | |
920 | break; | |
921 | default: | |
922 | err = -ENOTCONN; | |
923 | break; | |
924 | } | |
925 | } | |
926 | } | |
927 | ||
928 | if (how == RCV_SHUTDOWN || how == SHUTDOWN_MASK) { | |
929 | err = iucv_path_quiesce(iucv_sk(sk)->path, NULL); | |
930 | if (err) | |
931 | err = -ENOTCONN; | |
932 | ||
933 | skb_queue_purge(&sk->sk_receive_queue); | |
934 | } | |
935 | ||
936 | /* Wake up anyone sleeping in poll */ | |
937 | sk->sk_state_change(sk); | |
938 | ||
939 | fail: | |
940 | release_sock(sk); | |
941 | return err; | |
942 | } | |
943 | ||
944 | static int iucv_sock_release(struct socket *sock) | |
945 | { | |
946 | struct sock *sk = sock->sk; | |
947 | int err = 0; | |
948 | ||
949 | if (!sk) | |
950 | return 0; | |
951 | ||
952 | iucv_sock_close(sk); | |
953 | ||
954 | /* Unregister with IUCV base support */ | |
955 | if (iucv_sk(sk)->path) { | |
956 | iucv_path_sever(iucv_sk(sk)->path, NULL); | |
957 | iucv_path_free(iucv_sk(sk)->path); | |
958 | iucv_sk(sk)->path = NULL; | |
959 | } | |
960 | ||
eac3731b JH |
961 | sock_orphan(sk); |
962 | iucv_sock_kill(sk); | |
963 | return err; | |
964 | } | |
965 | ||
966 | /* Callback wrappers - called from iucv base support */ | |
967 | static int iucv_callback_connreq(struct iucv_path *path, | |
968 | u8 ipvmid[8], u8 ipuser[16]) | |
969 | { | |
970 | unsigned char user_data[16]; | |
971 | unsigned char nuser_data[16]; | |
972 | unsigned char src_name[8]; | |
973 | struct hlist_node *node; | |
974 | struct sock *sk, *nsk; | |
975 | struct iucv_sock *iucv, *niucv; | |
976 | int err; | |
977 | ||
978 | memcpy(src_name, ipuser, 8); | |
979 | EBCASC(src_name, 8); | |
980 | /* Find out if this path belongs to af_iucv. */ | |
981 | read_lock(&iucv_sk_list.lock); | |
982 | iucv = NULL; | |
febca281 | 983 | sk = NULL; |
eac3731b JH |
984 | sk_for_each(sk, node, &iucv_sk_list.head) |
985 | if (sk->sk_state == IUCV_LISTEN && | |
986 | !memcmp(&iucv_sk(sk)->src_name, src_name, 8)) { | |
987 | /* | |
988 | * Found a listening socket with | |
989 | * src_name == ipuser[0-7]. | |
990 | */ | |
991 | iucv = iucv_sk(sk); | |
992 | break; | |
993 | } | |
994 | read_unlock(&iucv_sk_list.lock); | |
995 | if (!iucv) | |
996 | /* No socket found, not one of our paths. */ | |
997 | return -EINVAL; | |
998 | ||
999 | bh_lock_sock(sk); | |
1000 | ||
1001 | /* Check if parent socket is listening */ | |
1002 | low_nmcpy(user_data, iucv->src_name); | |
1003 | high_nmcpy(user_data, iucv->dst_name); | |
1004 | ASCEBC(user_data, sizeof(user_data)); | |
1005 | if (sk->sk_state != IUCV_LISTEN) { | |
1006 | err = iucv_path_sever(path, user_data); | |
1007 | goto fail; | |
1008 | } | |
1009 | ||
1010 | /* Check for backlog size */ | |
1011 | if (sk_acceptq_is_full(sk)) { | |
1012 | err = iucv_path_sever(path, user_data); | |
1013 | goto fail; | |
1014 | } | |
1015 | ||
1016 | /* Create the new socket */ | |
1017 | nsk = iucv_sock_alloc(NULL, SOCK_STREAM, GFP_ATOMIC); | |
da99f056 | 1018 | if (!nsk) { |
eac3731b JH |
1019 | err = iucv_path_sever(path, user_data); |
1020 | goto fail; | |
1021 | } | |
1022 | ||
1023 | niucv = iucv_sk(nsk); | |
1024 | iucv_sock_init(nsk, sk); | |
1025 | ||
1026 | /* Set the new iucv_sock */ | |
1027 | memcpy(niucv->dst_name, ipuser + 8, 8); | |
1028 | EBCASC(niucv->dst_name, 8); | |
1029 | memcpy(niucv->dst_user_id, ipvmid, 8); | |
1030 | memcpy(niucv->src_name, iucv->src_name, 8); | |
1031 | memcpy(niucv->src_user_id, iucv->src_user_id, 8); | |
1032 | niucv->path = path; | |
1033 | ||
1034 | /* Call iucv_accept */ | |
1035 | high_nmcpy(nuser_data, ipuser + 8); | |
1036 | memcpy(nuser_data + 8, niucv->src_name, 8); | |
1037 | ASCEBC(nuser_data + 8, 8); | |
1038 | ||
1039 | path->msglim = IUCV_QUEUELEN_DEFAULT; | |
1040 | err = iucv_path_accept(path, &af_iucv_handler, nuser_data, nsk); | |
da99f056 | 1041 | if (err) { |
eac3731b JH |
1042 | err = iucv_path_sever(path, user_data); |
1043 | goto fail; | |
1044 | } | |
1045 | ||
1046 | iucv_accept_enqueue(sk, nsk); | |
1047 | ||
1048 | /* Wake up accept */ | |
1049 | nsk->sk_state = IUCV_CONNECTED; | |
1050 | sk->sk_data_ready(sk, 1); | |
1051 | err = 0; | |
1052 | fail: | |
1053 | bh_unlock_sock(sk); | |
1054 | return 0; | |
1055 | } | |
1056 | ||
1057 | static void iucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) | |
1058 | { | |
1059 | struct sock *sk = path->private; | |
1060 | ||
1061 | sk->sk_state = IUCV_CONNECTED; | |
1062 | sk->sk_state_change(sk); | |
1063 | } | |
1064 | ||
1065 | static void iucv_callback_rx(struct iucv_path *path, struct iucv_message *msg) | |
1066 | { | |
1067 | struct sock *sk = path->private; | |
561e0360 | 1068 | struct iucv_sock *iucv = iucv_sk(sk); |
f0703c80 UB |
1069 | struct sk_buff *skb; |
1070 | struct sock_msg_q *save_msg; | |
1071 | int len; | |
561e0360 | 1072 | |
eac3731b JH |
1073 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
1074 | return; | |
1075 | ||
f0703c80 UB |
1076 | if (!list_empty(&iucv->message_q.list) || |
1077 | !skb_queue_empty(&iucv->backlog_skb_q)) | |
1078 | goto save_message; | |
1079 | ||
1080 | len = atomic_read(&sk->sk_rmem_alloc); | |
1081 | len += msg->length + sizeof(struct sk_buff); | |
1082 | if (len > sk->sk_rcvbuf) | |
1083 | goto save_message; | |
1084 | ||
eac3731b | 1085 | skb = alloc_skb(msg->length, GFP_ATOMIC | GFP_DMA); |
f0703c80 UB |
1086 | if (!skb) |
1087 | goto save_message; | |
eac3731b | 1088 | |
f0703c80 UB |
1089 | spin_lock(&iucv->message_q.lock); |
1090 | iucv_process_message(sk, skb, path, msg); | |
1091 | spin_unlock(&iucv->message_q.lock); | |
eac3731b | 1092 | |
f0703c80 UB |
1093 | return; |
1094 | ||
1095 | save_message: | |
1096 | save_msg = kzalloc(sizeof(struct sock_msg_q), GFP_ATOMIC | GFP_DMA); | |
1097 | save_msg->path = path; | |
1098 | save_msg->msg = *msg; | |
eac3731b | 1099 | |
f0703c80 UB |
1100 | spin_lock(&iucv->message_q.lock); |
1101 | list_add_tail(&save_msg->list, &iucv->message_q.list); | |
1102 | spin_unlock(&iucv->message_q.lock); | |
eac3731b JH |
1103 | } |
1104 | ||
1105 | static void iucv_callback_txdone(struct iucv_path *path, | |
1106 | struct iucv_message *msg) | |
1107 | { | |
1108 | struct sock *sk = path->private; | |
1109 | struct sk_buff *this; | |
1110 | struct sk_buff_head *list = &iucv_sk(sk)->send_skb_q; | |
1111 | struct sk_buff *list_skb = list->next; | |
1112 | unsigned long flags; | |
1113 | ||
561e0360 JH |
1114 | if (list_skb) { |
1115 | spin_lock_irqsave(&list->lock, flags); | |
1116 | ||
1117 | do { | |
1118 | this = list_skb; | |
1119 | list_skb = list_skb->next; | |
1120 | } while (memcmp(&msg->tag, this->cb, 4) && list_skb); | |
1121 | ||
1122 | spin_unlock_irqrestore(&list->lock, flags); | |
eac3731b | 1123 | |
561e0360 JH |
1124 | skb_unlink(this, &iucv_sk(sk)->send_skb_q); |
1125 | kfree_skb(this); | |
1126 | } | |
eac3731b | 1127 | |
da99f056 | 1128 | if (sk->sk_state == IUCV_CLOSING) { |
561e0360 JH |
1129 | if (skb_queue_empty(&iucv_sk(sk)->send_skb_q)) { |
1130 | sk->sk_state = IUCV_CLOSED; | |
1131 | sk->sk_state_change(sk); | |
1132 | } | |
1133 | } | |
eac3731b | 1134 | |
eac3731b JH |
1135 | } |
1136 | ||
1137 | static void iucv_callback_connrej(struct iucv_path *path, u8 ipuser[16]) | |
1138 | { | |
1139 | struct sock *sk = path->private; | |
1140 | ||
1141 | if (!list_empty(&iucv_sk(sk)->accept_q)) | |
1142 | sk->sk_state = IUCV_SEVERED; | |
1143 | else | |
1144 | sk->sk_state = IUCV_DISCONN; | |
1145 | ||
1146 | sk->sk_state_change(sk); | |
1147 | } | |
1148 | ||
1149 | static struct proto_ops iucv_sock_ops = { | |
1150 | .family = PF_IUCV, | |
1151 | .owner = THIS_MODULE, | |
1152 | .release = iucv_sock_release, | |
1153 | .bind = iucv_sock_bind, | |
1154 | .connect = iucv_sock_connect, | |
1155 | .listen = iucv_sock_listen, | |
1156 | .accept = iucv_sock_accept, | |
1157 | .getname = iucv_sock_getname, | |
1158 | .sendmsg = iucv_sock_sendmsg, | |
1159 | .recvmsg = iucv_sock_recvmsg, | |
1160 | .poll = iucv_sock_poll, | |
1161 | .ioctl = sock_no_ioctl, | |
1162 | .mmap = sock_no_mmap, | |
1163 | .socketpair = sock_no_socketpair, | |
1164 | .shutdown = iucv_sock_shutdown, | |
1165 | .setsockopt = sock_no_setsockopt, | |
1166 | .getsockopt = sock_no_getsockopt | |
1167 | }; | |
1168 | ||
1169 | static struct net_proto_family iucv_sock_family_ops = { | |
1170 | .family = AF_IUCV, | |
1171 | .owner = THIS_MODULE, | |
1172 | .create = iucv_sock_create, | |
1173 | }; | |
1174 | ||
da99f056 | 1175 | static int __init afiucv_init(void) |
eac3731b JH |
1176 | { |
1177 | int err; | |
1178 | ||
1179 | if (!MACHINE_IS_VM) { | |
1180 | printk(KERN_ERR "AF_IUCV connection needs VM as base\n"); | |
1181 | err = -EPROTONOSUPPORT; | |
1182 | goto out; | |
1183 | } | |
1184 | cpcmd("QUERY USERID", iucv_userid, sizeof(iucv_userid), &err); | |
1185 | if (unlikely(err)) { | |
1186 | printk(KERN_ERR "AF_IUCV needs the VM userid\n"); | |
1187 | err = -EPROTONOSUPPORT; | |
1188 | goto out; | |
1189 | } | |
1190 | ||
1191 | err = iucv_register(&af_iucv_handler, 0); | |
1192 | if (err) | |
1193 | goto out; | |
1194 | err = proto_register(&iucv_proto, 0); | |
1195 | if (err) | |
1196 | goto out_iucv; | |
1197 | err = sock_register(&iucv_sock_family_ops); | |
1198 | if (err) | |
1199 | goto out_proto; | |
1200 | printk(KERN_INFO "AF_IUCV lowlevel driver initialized\n"); | |
1201 | return 0; | |
1202 | ||
1203 | out_proto: | |
1204 | proto_unregister(&iucv_proto); | |
1205 | out_iucv: | |
1206 | iucv_unregister(&af_iucv_handler, 0); | |
1207 | out: | |
1208 | return err; | |
1209 | } | |
1210 | ||
1211 | static void __exit afiucv_exit(void) | |
1212 | { | |
1213 | sock_unregister(PF_IUCV); | |
1214 | proto_unregister(&iucv_proto); | |
1215 | iucv_unregister(&af_iucv_handler, 0); | |
1216 | ||
1217 | printk(KERN_INFO "AF_IUCV lowlevel driver unloaded\n"); | |
1218 | } | |
1219 | ||
1220 | module_init(afiucv_init); | |
1221 | module_exit(afiucv_exit); | |
1222 | ||
1223 | MODULE_AUTHOR("Jennifer Hunt <jenhunt@us.ibm.com>"); | |
1224 | MODULE_DESCRIPTION("IUCV Sockets ver " VERSION); | |
1225 | MODULE_VERSION(VERSION); | |
1226 | MODULE_LICENSE("GPL"); | |
1227 | MODULE_ALIAS_NETPROTO(PF_IUCV); |