]>
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 | ||
8f7c502c UB |
11 | #define KMSG_COMPONENT "af_iucv" |
12 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
13 | ||
eac3731b JH |
14 | #include <linux/module.h> |
15 | #include <linux/types.h> | |
16 | #include <linux/list.h> | |
17 | #include <linux/errno.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/sched.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/skbuff.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/poll.h> | |
24 | #include <net/sock.h> | |
25 | #include <asm/ebcdic.h> | |
26 | #include <asm/cpcmd.h> | |
27 | #include <linux/kmod.h> | |
28 | ||
29 | #include <net/iucv/iucv.h> | |
30 | #include <net/iucv/af_iucv.h> | |
31 | ||
32 | #define CONFIG_IUCV_SOCK_DEBUG 1 | |
33 | ||
34 | #define IPRMDATA 0x80 | |
35 | #define VERSION "1.0" | |
36 | ||
37 | static char iucv_userid[80]; | |
38 | ||
39 | static struct proto_ops iucv_sock_ops; | |
40 | ||
41 | static struct proto iucv_proto = { | |
42 | .name = "AF_IUCV", | |
43 | .owner = THIS_MODULE, | |
44 | .obj_size = sizeof(struct iucv_sock), | |
45 | }; | |
46 | ||
57f20448 HC |
47 | static void iucv_sock_kill(struct sock *sk); |
48 | static void iucv_sock_close(struct sock *sk); | |
49 | ||
eac3731b JH |
50 | /* Call Back functions */ |
51 | static void iucv_callback_rx(struct iucv_path *, struct iucv_message *); | |
52 | static void iucv_callback_txdone(struct iucv_path *, struct iucv_message *); | |
53 | static void iucv_callback_connack(struct iucv_path *, u8 ipuser[16]); | |
da99f056 HC |
54 | static int iucv_callback_connreq(struct iucv_path *, u8 ipvmid[8], |
55 | u8 ipuser[16]); | |
eac3731b JH |
56 | static void iucv_callback_connrej(struct iucv_path *, u8 ipuser[16]); |
57 | ||
58 | static struct iucv_sock_list iucv_sk_list = { | |
3db8ce35 | 59 | .lock = __RW_LOCK_UNLOCKED(iucv_sk_list.lock), |
eac3731b JH |
60 | .autobind_name = ATOMIC_INIT(0) |
61 | }; | |
62 | ||
63 | static struct iucv_handler af_iucv_handler = { | |
64 | .path_pending = iucv_callback_connreq, | |
65 | .path_complete = iucv_callback_connack, | |
66 | .path_severed = iucv_callback_connrej, | |
67 | .message_pending = iucv_callback_rx, | |
68 | .message_complete = iucv_callback_txdone | |
69 | }; | |
70 | ||
71 | static inline void high_nmcpy(unsigned char *dst, char *src) | |
72 | { | |
73 | memcpy(dst, src, 8); | |
74 | } | |
75 | ||
76 | static inline void low_nmcpy(unsigned char *dst, char *src) | |
77 | { | |
78 | memcpy(&dst[8], src, 8); | |
79 | } | |
80 | ||
81 | /* Timers */ | |
82 | static void iucv_sock_timeout(unsigned long arg) | |
83 | { | |
84 | struct sock *sk = (struct sock *)arg; | |
85 | ||
86 | bh_lock_sock(sk); | |
87 | sk->sk_err = ETIMEDOUT; | |
88 | sk->sk_state_change(sk); | |
89 | bh_unlock_sock(sk); | |
90 | ||
91 | iucv_sock_kill(sk); | |
92 | sock_put(sk); | |
93 | } | |
94 | ||
95 | static void iucv_sock_clear_timer(struct sock *sk) | |
96 | { | |
97 | sk_stop_timer(sk, &sk->sk_timer); | |
98 | } | |
99 | ||
eac3731b JH |
100 | static struct sock *__iucv_get_sock_by_name(char *nm) |
101 | { | |
102 | struct sock *sk; | |
103 | struct hlist_node *node; | |
104 | ||
105 | sk_for_each(sk, node, &iucv_sk_list.head) | |
106 | if (!memcmp(&iucv_sk(sk)->src_name, nm, 8)) | |
107 | return sk; | |
108 | ||
109 | return NULL; | |
110 | } | |
111 | ||
112 | static void iucv_sock_destruct(struct sock *sk) | |
113 | { | |
114 | skb_queue_purge(&sk->sk_receive_queue); | |
115 | skb_queue_purge(&sk->sk_write_queue); | |
116 | } | |
117 | ||
118 | /* Cleanup Listen */ | |
119 | static void iucv_sock_cleanup_listen(struct sock *parent) | |
120 | { | |
121 | struct sock *sk; | |
122 | ||
123 | /* Close non-accepted connections */ | |
124 | while ((sk = iucv_accept_dequeue(parent, NULL))) { | |
125 | iucv_sock_close(sk); | |
126 | iucv_sock_kill(sk); | |
127 | } | |
128 | ||
129 | parent->sk_state = IUCV_CLOSED; | |
130 | sock_set_flag(parent, SOCK_ZAPPED); | |
131 | } | |
132 | ||
133 | /* Kill socket */ | |
134 | static void iucv_sock_kill(struct sock *sk) | |
135 | { | |
136 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
137 | return; | |
138 | ||
139 | iucv_sock_unlink(&iucv_sk_list, sk); | |
140 | sock_set_flag(sk, SOCK_DEAD); | |
141 | sock_put(sk); | |
142 | } | |
143 | ||
144 | /* Close an IUCV socket */ | |
145 | static void iucv_sock_close(struct sock *sk) | |
146 | { | |
147 | unsigned char user_data[16]; | |
148 | struct iucv_sock *iucv = iucv_sk(sk); | |
149 | int err; | |
561e0360 | 150 | unsigned long timeo; |
eac3731b JH |
151 | |
152 | iucv_sock_clear_timer(sk); | |
153 | lock_sock(sk); | |
154 | ||
da99f056 | 155 | switch (sk->sk_state) { |
eac3731b JH |
156 | case IUCV_LISTEN: |
157 | iucv_sock_cleanup_listen(sk); | |
158 | break; | |
159 | ||
160 | case IUCV_CONNECTED: | |
161 | case IUCV_DISCONN: | |
162 | err = 0; | |
561e0360 JH |
163 | |
164 | sk->sk_state = IUCV_CLOSING; | |
165 | sk->sk_state_change(sk); | |
166 | ||
da99f056 | 167 | if (!skb_queue_empty(&iucv->send_skb_q)) { |
561e0360 JH |
168 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) |
169 | timeo = sk->sk_lingertime; | |
170 | else | |
171 | timeo = IUCV_DISCONN_TIMEOUT; | |
172 | err = iucv_sock_wait_state(sk, IUCV_CLOSED, 0, timeo); | |
173 | } | |
174 | ||
175 | sk->sk_state = IUCV_CLOSED; | |
176 | sk->sk_state_change(sk); | |
177 | ||
eac3731b JH |
178 | if (iucv->path) { |
179 | low_nmcpy(user_data, iucv->src_name); | |
180 | high_nmcpy(user_data, iucv->dst_name); | |
181 | ASCEBC(user_data, sizeof(user_data)); | |
182 | err = iucv_path_sever(iucv->path, user_data); | |
183 | iucv_path_free(iucv->path); | |
184 | iucv->path = NULL; | |
185 | } | |
186 | ||
eac3731b JH |
187 | sk->sk_err = ECONNRESET; |
188 | sk->sk_state_change(sk); | |
189 | ||
190 | skb_queue_purge(&iucv->send_skb_q); | |
561e0360 | 191 | skb_queue_purge(&iucv->backlog_skb_q); |
eac3731b JH |
192 | |
193 | sock_set_flag(sk, SOCK_ZAPPED); | |
194 | break; | |
195 | ||
196 | default: | |
197 | sock_set_flag(sk, SOCK_ZAPPED); | |
198 | break; | |
3ff50b79 | 199 | } |
eac3731b JH |
200 | |
201 | release_sock(sk); | |
202 | iucv_sock_kill(sk); | |
203 | } | |
204 | ||
205 | static void iucv_sock_init(struct sock *sk, struct sock *parent) | |
206 | { | |
207 | if (parent) | |
208 | sk->sk_type = parent->sk_type; | |
209 | } | |
210 | ||
211 | static struct sock *iucv_sock_alloc(struct socket *sock, int proto, gfp_t prio) | |
212 | { | |
213 | struct sock *sk; | |
214 | ||
6257ff21 | 215 | sk = sk_alloc(&init_net, PF_IUCV, prio, &iucv_proto); |
eac3731b JH |
216 | if (!sk) |
217 | return NULL; | |
218 | ||
219 | sock_init_data(sock, sk); | |
220 | INIT_LIST_HEAD(&iucv_sk(sk)->accept_q); | |
febca281 | 221 | spin_lock_init(&iucv_sk(sk)->accept_q_lock); |
eac3731b | 222 | skb_queue_head_init(&iucv_sk(sk)->send_skb_q); |
f0703c80 UB |
223 | INIT_LIST_HEAD(&iucv_sk(sk)->message_q.list); |
224 | spin_lock_init(&iucv_sk(sk)->message_q.lock); | |
561e0360 | 225 | skb_queue_head_init(&iucv_sk(sk)->backlog_skb_q); |
eac3731b JH |
226 | iucv_sk(sk)->send_tag = 0; |
227 | ||
228 | sk->sk_destruct = iucv_sock_destruct; | |
229 | sk->sk_sndtimeo = IUCV_CONN_TIMEOUT; | |
230 | sk->sk_allocation = GFP_DMA; | |
231 | ||
232 | sock_reset_flag(sk, SOCK_ZAPPED); | |
233 | ||
234 | sk->sk_protocol = proto; | |
235 | sk->sk_state = IUCV_OPEN; | |
236 | ||
b24b8a24 | 237 | setup_timer(&sk->sk_timer, iucv_sock_timeout, (unsigned long)sk); |
eac3731b JH |
238 | |
239 | iucv_sock_link(&iucv_sk_list, sk); | |
240 | return sk; | |
241 | } | |
242 | ||
243 | /* Create an IUCV socket */ | |
1b8d7ae4 | 244 | static int iucv_sock_create(struct net *net, struct socket *sock, int protocol) |
eac3731b JH |
245 | { |
246 | struct sock *sk; | |
247 | ||
248 | if (sock->type != SOCK_STREAM) | |
249 | return -ESOCKTNOSUPPORT; | |
250 | ||
251 | sock->state = SS_UNCONNECTED; | |
252 | sock->ops = &iucv_sock_ops; | |
253 | ||
254 | sk = iucv_sock_alloc(sock, protocol, GFP_KERNEL); | |
255 | if (!sk) | |
256 | return -ENOMEM; | |
257 | ||
258 | iucv_sock_init(sk, NULL); | |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
263 | void iucv_sock_link(struct iucv_sock_list *l, struct sock *sk) | |
264 | { | |
265 | write_lock_bh(&l->lock); | |
266 | sk_add_node(sk, &l->head); | |
267 | write_unlock_bh(&l->lock); | |
268 | } | |
269 | ||
270 | void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *sk) | |
271 | { | |
272 | write_lock_bh(&l->lock); | |
273 | sk_del_node_init(sk); | |
274 | write_unlock_bh(&l->lock); | |
275 | } | |
276 | ||
277 | void iucv_accept_enqueue(struct sock *parent, struct sock *sk) | |
278 | { | |
febca281 UB |
279 | unsigned long flags; |
280 | struct iucv_sock *par = iucv_sk(parent); | |
281 | ||
eac3731b | 282 | sock_hold(sk); |
febca281 UB |
283 | spin_lock_irqsave(&par->accept_q_lock, flags); |
284 | list_add_tail(&iucv_sk(sk)->accept_q, &par->accept_q); | |
285 | spin_unlock_irqrestore(&par->accept_q_lock, flags); | |
eac3731b JH |
286 | iucv_sk(sk)->parent = parent; |
287 | parent->sk_ack_backlog++; | |
288 | } | |
289 | ||
290 | void iucv_accept_unlink(struct sock *sk) | |
291 | { | |
febca281 UB |
292 | unsigned long flags; |
293 | struct iucv_sock *par = iucv_sk(iucv_sk(sk)->parent); | |
294 | ||
295 | spin_lock_irqsave(&par->accept_q_lock, flags); | |
eac3731b | 296 | list_del_init(&iucv_sk(sk)->accept_q); |
febca281 | 297 | spin_unlock_irqrestore(&par->accept_q_lock, flags); |
eac3731b JH |
298 | iucv_sk(sk)->parent->sk_ack_backlog--; |
299 | iucv_sk(sk)->parent = NULL; | |
300 | sock_put(sk); | |
301 | } | |
302 | ||
303 | struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock) | |
304 | { | |
305 | struct iucv_sock *isk, *n; | |
306 | struct sock *sk; | |
307 | ||
da99f056 | 308 | list_for_each_entry_safe(isk, n, &iucv_sk(parent)->accept_q, accept_q) { |
eac3731b JH |
309 | sk = (struct sock *) isk; |
310 | lock_sock(sk); | |
311 | ||
312 | if (sk->sk_state == IUCV_CLOSED) { | |
eac3731b | 313 | iucv_accept_unlink(sk); |
febca281 | 314 | release_sock(sk); |
eac3731b JH |
315 | continue; |
316 | } | |
317 | ||
318 | if (sk->sk_state == IUCV_CONNECTED || | |
319 | sk->sk_state == IUCV_SEVERED || | |
320 | !newsock) { | |
321 | iucv_accept_unlink(sk); | |
322 | if (newsock) | |
323 | sock_graft(sk, newsock); | |
324 | ||
325 | if (sk->sk_state == IUCV_SEVERED) | |
326 | sk->sk_state = IUCV_DISCONN; | |
327 | ||
328 | release_sock(sk); | |
329 | return sk; | |
330 | } | |
331 | ||
332 | release_sock(sk); | |
333 | } | |
334 | return NULL; | |
335 | } | |
336 | ||
337 | int iucv_sock_wait_state(struct sock *sk, int state, int state2, | |
338 | unsigned long timeo) | |
339 | { | |
340 | DECLARE_WAITQUEUE(wait, current); | |
341 | int err = 0; | |
342 | ||
343 | add_wait_queue(sk->sk_sleep, &wait); | |
344 | while (sk->sk_state != state && sk->sk_state != state2) { | |
345 | set_current_state(TASK_INTERRUPTIBLE); | |
346 | ||
347 | if (!timeo) { | |
348 | err = -EAGAIN; | |
349 | break; | |
350 | } | |
351 | ||
352 | if (signal_pending(current)) { | |
353 | err = sock_intr_errno(timeo); | |
354 | break; | |
355 | } | |
356 | ||
357 | release_sock(sk); | |
358 | timeo = schedule_timeout(timeo); | |
359 | lock_sock(sk); | |
360 | ||
361 | err = sock_error(sk); | |
362 | if (err) | |
363 | break; | |
364 | } | |
365 | set_current_state(TASK_RUNNING); | |
366 | remove_wait_queue(sk->sk_sleep, &wait); | |
367 | return err; | |
368 | } | |
369 | ||
370 | /* Bind an unbound socket */ | |
371 | static int iucv_sock_bind(struct socket *sock, struct sockaddr *addr, | |
372 | int addr_len) | |
373 | { | |
374 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
375 | struct sock *sk = sock->sk; | |
376 | struct iucv_sock *iucv; | |
377 | int err; | |
378 | ||
379 | /* Verify the input sockaddr */ | |
380 | if (!addr || addr->sa_family != AF_IUCV) | |
381 | return -EINVAL; | |
382 | ||
383 | lock_sock(sk); | |
384 | if (sk->sk_state != IUCV_OPEN) { | |
385 | err = -EBADFD; | |
386 | goto done; | |
387 | } | |
388 | ||
389 | write_lock_bh(&iucv_sk_list.lock); | |
390 | ||
391 | iucv = iucv_sk(sk); | |
392 | if (__iucv_get_sock_by_name(sa->siucv_name)) { | |
393 | err = -EADDRINUSE; | |
394 | goto done_unlock; | |
395 | } | |
396 | if (iucv->path) { | |
397 | err = 0; | |
398 | goto done_unlock; | |
399 | } | |
400 | ||
401 | /* Bind the socket */ | |
402 | memcpy(iucv->src_name, sa->siucv_name, 8); | |
403 | ||
404 | /* Copy the user id */ | |
405 | memcpy(iucv->src_user_id, iucv_userid, 8); | |
406 | sk->sk_state = IUCV_BOUND; | |
407 | err = 0; | |
408 | ||
409 | done_unlock: | |
410 | /* Release the socket list lock */ | |
411 | write_unlock_bh(&iucv_sk_list.lock); | |
412 | done: | |
413 | release_sock(sk); | |
414 | return err; | |
415 | } | |
416 | ||
417 | /* Automatically bind an unbound socket */ | |
418 | static int iucv_sock_autobind(struct sock *sk) | |
419 | { | |
420 | struct iucv_sock *iucv = iucv_sk(sk); | |
421 | char query_buffer[80]; | |
422 | char name[12]; | |
423 | int err = 0; | |
424 | ||
425 | /* Set the userid and name */ | |
426 | cpcmd("QUERY USERID", query_buffer, sizeof(query_buffer), &err); | |
427 | if (unlikely(err)) | |
428 | return -EPROTO; | |
429 | ||
430 | memcpy(iucv->src_user_id, query_buffer, 8); | |
431 | ||
432 | write_lock_bh(&iucv_sk_list.lock); | |
433 | ||
434 | sprintf(name, "%08x", atomic_inc_return(&iucv_sk_list.autobind_name)); | |
435 | while (__iucv_get_sock_by_name(name)) { | |
436 | sprintf(name, "%08x", | |
437 | atomic_inc_return(&iucv_sk_list.autobind_name)); | |
438 | } | |
439 | ||
440 | write_unlock_bh(&iucv_sk_list.lock); | |
441 | ||
442 | memcpy(&iucv->src_name, name, 8); | |
443 | ||
444 | return err; | |
445 | } | |
446 | ||
447 | /* Connect an unconnected socket */ | |
448 | static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr, | |
449 | int alen, int flags) | |
450 | { | |
451 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
452 | struct sock *sk = sock->sk; | |
453 | struct iucv_sock *iucv; | |
454 | unsigned char user_data[16]; | |
455 | int err; | |
456 | ||
457 | if (addr->sa_family != AF_IUCV || alen < sizeof(struct sockaddr_iucv)) | |
458 | return -EINVAL; | |
459 | ||
460 | if (sk->sk_state != IUCV_OPEN && sk->sk_state != IUCV_BOUND) | |
461 | return -EBADFD; | |
462 | ||
463 | if (sk->sk_type != SOCK_STREAM) | |
464 | return -EINVAL; | |
465 | ||
466 | iucv = iucv_sk(sk); | |
467 | ||
468 | if (sk->sk_state == IUCV_OPEN) { | |
469 | err = iucv_sock_autobind(sk); | |
470 | if (unlikely(err)) | |
471 | return err; | |
472 | } | |
473 | ||
474 | lock_sock(sk); | |
475 | ||
476 | /* Set the destination information */ | |
477 | memcpy(iucv_sk(sk)->dst_user_id, sa->siucv_user_id, 8); | |
478 | memcpy(iucv_sk(sk)->dst_name, sa->siucv_name, 8); | |
479 | ||
480 | high_nmcpy(user_data, sa->siucv_name); | |
481 | low_nmcpy(user_data, iucv_sk(sk)->src_name); | |
482 | ASCEBC(user_data, sizeof(user_data)); | |
483 | ||
484 | iucv = iucv_sk(sk); | |
485 | /* Create path. */ | |
486 | iucv->path = iucv_path_alloc(IUCV_QUEUELEN_DEFAULT, | |
487 | IPRMDATA, GFP_KERNEL); | |
d4444722 UB |
488 | if (!iucv->path) { |
489 | err = -ENOMEM; | |
490 | goto done; | |
491 | } | |
eac3731b JH |
492 | err = iucv_path_connect(iucv->path, &af_iucv_handler, |
493 | sa->siucv_user_id, NULL, user_data, sk); | |
494 | if (err) { | |
495 | iucv_path_free(iucv->path); | |
496 | iucv->path = NULL; | |
55cdea9e HB |
497 | switch (err) { |
498 | case 0x0b: /* Target communicator is not logged on */ | |
499 | err = -ENETUNREACH; | |
500 | break; | |
501 | case 0x0d: /* Max connections for this guest exceeded */ | |
502 | case 0x0e: /* Max connections for target guest exceeded */ | |
503 | err = -EAGAIN; | |
504 | break; | |
505 | case 0x0f: /* Missing IUCV authorization */ | |
506 | err = -EACCES; | |
507 | break; | |
508 | default: | |
509 | err = -ECONNREFUSED; | |
510 | break; | |
511 | } | |
eac3731b JH |
512 | goto done; |
513 | } | |
514 | ||
515 | if (sk->sk_state != IUCV_CONNECTED) { | |
516 | err = iucv_sock_wait_state(sk, IUCV_CONNECTED, IUCV_DISCONN, | |
517 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
518 | } | |
519 | ||
520 | if (sk->sk_state == IUCV_DISCONN) { | |
521 | release_sock(sk); | |
522 | return -ECONNREFUSED; | |
523 | } | |
524 | done: | |
525 | release_sock(sk); | |
526 | return err; | |
527 | } | |
528 | ||
529 | /* Move a socket into listening state. */ | |
530 | static int iucv_sock_listen(struct socket *sock, int backlog) | |
531 | { | |
532 | struct sock *sk = sock->sk; | |
533 | int err; | |
534 | ||
535 | lock_sock(sk); | |
536 | ||
537 | err = -EINVAL; | |
538 | if (sk->sk_state != IUCV_BOUND || sock->type != SOCK_STREAM) | |
539 | goto done; | |
540 | ||
541 | sk->sk_max_ack_backlog = backlog; | |
542 | sk->sk_ack_backlog = 0; | |
543 | sk->sk_state = IUCV_LISTEN; | |
544 | err = 0; | |
545 | ||
546 | done: | |
547 | release_sock(sk); | |
548 | return err; | |
549 | } | |
550 | ||
551 | /* Accept a pending connection */ | |
552 | static int iucv_sock_accept(struct socket *sock, struct socket *newsock, | |
553 | int flags) | |
554 | { | |
555 | DECLARE_WAITQUEUE(wait, current); | |
556 | struct sock *sk = sock->sk, *nsk; | |
557 | long timeo; | |
558 | int err = 0; | |
559 | ||
561e0360 | 560 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
eac3731b JH |
561 | |
562 | if (sk->sk_state != IUCV_LISTEN) { | |
563 | err = -EBADFD; | |
564 | goto done; | |
565 | } | |
566 | ||
567 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
568 | ||
569 | /* Wait for an incoming connection */ | |
570 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
da99f056 | 571 | while (!(nsk = iucv_accept_dequeue(sk, newsock))) { |
eac3731b JH |
572 | set_current_state(TASK_INTERRUPTIBLE); |
573 | if (!timeo) { | |
574 | err = -EAGAIN; | |
575 | break; | |
576 | } | |
577 | ||
578 | release_sock(sk); | |
579 | timeo = schedule_timeout(timeo); | |
561e0360 | 580 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
eac3731b JH |
581 | |
582 | if (sk->sk_state != IUCV_LISTEN) { | |
583 | err = -EBADFD; | |
584 | break; | |
585 | } | |
586 | ||
587 | if (signal_pending(current)) { | |
588 | err = sock_intr_errno(timeo); | |
589 | break; | |
590 | } | |
591 | } | |
592 | ||
593 | set_current_state(TASK_RUNNING); | |
594 | remove_wait_queue(sk->sk_sleep, &wait); | |
595 | ||
596 | if (err) | |
597 | goto done; | |
598 | ||
599 | newsock->state = SS_CONNECTED; | |
600 | ||
601 | done: | |
602 | release_sock(sk); | |
603 | return err; | |
604 | } | |
605 | ||
606 | static int iucv_sock_getname(struct socket *sock, struct sockaddr *addr, | |
607 | int *len, int peer) | |
608 | { | |
609 | struct sockaddr_iucv *siucv = (struct sockaddr_iucv *) addr; | |
610 | struct sock *sk = sock->sk; | |
611 | ||
612 | addr->sa_family = AF_IUCV; | |
613 | *len = sizeof(struct sockaddr_iucv); | |
614 | ||
615 | if (peer) { | |
616 | memcpy(siucv->siucv_user_id, iucv_sk(sk)->dst_user_id, 8); | |
617 | memcpy(siucv->siucv_name, &iucv_sk(sk)->dst_name, 8); | |
618 | } else { | |
619 | memcpy(siucv->siucv_user_id, iucv_sk(sk)->src_user_id, 8); | |
620 | memcpy(siucv->siucv_name, iucv_sk(sk)->src_name, 8); | |
621 | } | |
622 | memset(&siucv->siucv_port, 0, sizeof(siucv->siucv_port)); | |
623 | memset(&siucv->siucv_addr, 0, sizeof(siucv->siucv_addr)); | |
624 | memset(siucv->siucv_nodeid, 0, sizeof(siucv->siucv_nodeid)); | |
625 | ||
626 | return 0; | |
627 | } | |
628 | ||
629 | static int iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock, | |
630 | struct msghdr *msg, size_t len) | |
631 | { | |
632 | struct sock *sk = sock->sk; | |
633 | struct iucv_sock *iucv = iucv_sk(sk); | |
634 | struct sk_buff *skb; | |
635 | struct iucv_message txmsg; | |
8f7c502c UB |
636 | char user_id[9]; |
637 | char appl_id[9]; | |
eac3731b JH |
638 | int err; |
639 | ||
640 | err = sock_error(sk); | |
641 | if (err) | |
642 | return err; | |
643 | ||
644 | if (msg->msg_flags & MSG_OOB) | |
645 | return -EOPNOTSUPP; | |
646 | ||
647 | lock_sock(sk); | |
648 | ||
649 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
650 | err = -EPIPE; | |
651 | goto out; | |
652 | } | |
653 | ||
da99f056 HC |
654 | if (sk->sk_state == IUCV_CONNECTED) { |
655 | if (!(skb = sock_alloc_send_skb(sk, len, | |
656 | msg->msg_flags & MSG_DONTWAIT, | |
657 | &err))) | |
561e0360 | 658 | goto out; |
eac3731b | 659 | |
da99f056 | 660 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { |
eac3731b JH |
661 | err = -EFAULT; |
662 | goto fail; | |
663 | } | |
664 | ||
665 | txmsg.class = 0; | |
469689a4 | 666 | memcpy(&txmsg.class, skb->data, skb->len >= 4 ? 4 : skb->len); |
eac3731b JH |
667 | txmsg.tag = iucv->send_tag++; |
668 | memcpy(skb->cb, &txmsg.tag, 4); | |
669 | skb_queue_tail(&iucv->send_skb_q, skb); | |
670 | err = iucv_message_send(iucv->path, &txmsg, 0, 0, | |
671 | (void *) skb->data, skb->len); | |
672 | if (err) { | |
8f7c502c UB |
673 | if (err == 3) { |
674 | user_id[8] = 0; | |
675 | memcpy(user_id, iucv->dst_user_id, 8); | |
676 | appl_id[8] = 0; | |
677 | memcpy(appl_id, iucv->dst_name, 8); | |
678 | pr_err("Application %s on z/VM guest %s" | |
679 | " exceeds message limit\n", | |
680 | user_id, appl_id); | |
681 | } | |
eac3731b JH |
682 | skb_unlink(skb, &iucv->send_skb_q); |
683 | err = -EPIPE; | |
684 | goto fail; | |
685 | } | |
686 | ||
687 | } else { | |
688 | err = -ENOTCONN; | |
689 | goto out; | |
690 | } | |
691 | ||
692 | release_sock(sk); | |
693 | return len; | |
694 | ||
695 | fail: | |
696 | kfree_skb(skb); | |
697 | out: | |
698 | release_sock(sk); | |
699 | return err; | |
700 | } | |
701 | ||
f0703c80 UB |
702 | static int iucv_fragment_skb(struct sock *sk, struct sk_buff *skb, int len) |
703 | { | |
704 | int dataleft, size, copied = 0; | |
705 | struct sk_buff *nskb; | |
706 | ||
707 | dataleft = len; | |
708 | while (dataleft) { | |
709 | if (dataleft >= sk->sk_rcvbuf / 4) | |
710 | size = sk->sk_rcvbuf / 4; | |
711 | else | |
712 | size = dataleft; | |
713 | ||
714 | nskb = alloc_skb(size, GFP_ATOMIC | GFP_DMA); | |
715 | if (!nskb) | |
716 | return -ENOMEM; | |
717 | ||
718 | memcpy(nskb->data, skb->data + copied, size); | |
719 | copied += size; | |
720 | dataleft -= size; | |
721 | ||
722 | skb_reset_transport_header(nskb); | |
723 | skb_reset_network_header(nskb); | |
724 | nskb->len = size; | |
725 | ||
726 | skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, nskb); | |
727 | } | |
728 | ||
729 | return 0; | |
730 | } | |
731 | ||
732 | static void iucv_process_message(struct sock *sk, struct sk_buff *skb, | |
733 | struct iucv_path *path, | |
734 | struct iucv_message *msg) | |
735 | { | |
736 | int rc; | |
737 | ||
738 | if (msg->flags & IPRMDATA) { | |
739 | skb->data = NULL; | |
740 | skb->len = 0; | |
741 | } else { | |
742 | rc = iucv_message_receive(path, msg, 0, skb->data, | |
743 | msg->length, NULL); | |
744 | if (rc) { | |
745 | kfree_skb(skb); | |
746 | return; | |
747 | } | |
748 | if (skb->truesize >= sk->sk_rcvbuf / 4) { | |
749 | rc = iucv_fragment_skb(sk, skb, msg->length); | |
750 | kfree_skb(skb); | |
751 | skb = NULL; | |
752 | if (rc) { | |
753 | iucv_path_sever(path, NULL); | |
754 | return; | |
755 | } | |
756 | skb = skb_dequeue(&iucv_sk(sk)->backlog_skb_q); | |
757 | } else { | |
758 | skb_reset_transport_header(skb); | |
759 | skb_reset_network_header(skb); | |
760 | skb->len = msg->length; | |
761 | } | |
762 | } | |
763 | ||
764 | if (sock_queue_rcv_skb(sk, skb)) | |
765 | skb_queue_head(&iucv_sk(sk)->backlog_skb_q, skb); | |
766 | } | |
767 | ||
768 | static void iucv_process_message_q(struct sock *sk) | |
769 | { | |
770 | struct iucv_sock *iucv = iucv_sk(sk); | |
771 | struct sk_buff *skb; | |
772 | struct sock_msg_q *p, *n; | |
773 | ||
774 | list_for_each_entry_safe(p, n, &iucv->message_q.list, list) { | |
775 | skb = alloc_skb(p->msg.length, GFP_ATOMIC | GFP_DMA); | |
776 | if (!skb) | |
777 | break; | |
778 | iucv_process_message(sk, skb, p->path, &p->msg); | |
779 | list_del(&p->list); | |
780 | kfree(p); | |
781 | if (!skb_queue_empty(&iucv->backlog_skb_q)) | |
782 | break; | |
783 | } | |
784 | } | |
785 | ||
eac3731b JH |
786 | static int iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
787 | struct msghdr *msg, size_t len, int flags) | |
788 | { | |
789 | int noblock = flags & MSG_DONTWAIT; | |
790 | struct sock *sk = sock->sk; | |
561e0360 | 791 | struct iucv_sock *iucv = iucv_sk(sk); |
eac3731b | 792 | int target, copied = 0; |
561e0360 | 793 | struct sk_buff *skb, *rskb, *cskb; |
eac3731b JH |
794 | int err = 0; |
795 | ||
561e0360 | 796 | if ((sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_SEVERED) && |
f0703c80 UB |
797 | skb_queue_empty(&iucv->backlog_skb_q) && |
798 | skb_queue_empty(&sk->sk_receive_queue) && | |
799 | list_empty(&iucv->message_q.list)) | |
561e0360 JH |
800 | return 0; |
801 | ||
eac3731b JH |
802 | if (flags & (MSG_OOB)) |
803 | return -EOPNOTSUPP; | |
804 | ||
805 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, len); | |
806 | ||
807 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
808 | if (!skb) { | |
809 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
810 | return 0; | |
811 | return err; | |
812 | } | |
813 | ||
814 | copied = min_t(unsigned int, skb->len, len); | |
815 | ||
561e0360 JH |
816 | cskb = skb; |
817 | if (memcpy_toiovec(msg->msg_iov, cskb->data, copied)) { | |
eac3731b JH |
818 | skb_queue_head(&sk->sk_receive_queue, skb); |
819 | if (copied == 0) | |
820 | return -EFAULT; | |
561e0360 | 821 | goto done; |
eac3731b JH |
822 | } |
823 | ||
824 | len -= copied; | |
825 | ||
826 | /* Mark read part of skb as used */ | |
827 | if (!(flags & MSG_PEEK)) { | |
828 | skb_pull(skb, copied); | |
829 | ||
830 | if (skb->len) { | |
831 | skb_queue_head(&sk->sk_receive_queue, skb); | |
832 | goto done; | |
833 | } | |
834 | ||
835 | kfree_skb(skb); | |
561e0360 JH |
836 | |
837 | /* Queue backlog skbs */ | |
f0703c80 | 838 | rskb = skb_dequeue(&iucv->backlog_skb_q); |
da99f056 | 839 | while (rskb) { |
561e0360 | 840 | if (sock_queue_rcv_skb(sk, rskb)) { |
f0703c80 | 841 | skb_queue_head(&iucv->backlog_skb_q, |
561e0360 JH |
842 | rskb); |
843 | break; | |
844 | } else { | |
f0703c80 | 845 | rskb = skb_dequeue(&iucv->backlog_skb_q); |
561e0360 JH |
846 | } |
847 | } | |
f0703c80 UB |
848 | if (skb_queue_empty(&iucv->backlog_skb_q)) { |
849 | spin_lock_bh(&iucv->message_q.lock); | |
850 | if (!list_empty(&iucv->message_q.list)) | |
851 | iucv_process_message_q(sk); | |
852 | spin_unlock_bh(&iucv->message_q.lock); | |
853 | } | |
854 | ||
eac3731b JH |
855 | } else |
856 | skb_queue_head(&sk->sk_receive_queue, skb); | |
857 | ||
858 | done: | |
859 | return err ? : copied; | |
860 | } | |
861 | ||
862 | static inline unsigned int iucv_accept_poll(struct sock *parent) | |
863 | { | |
864 | struct iucv_sock *isk, *n; | |
865 | struct sock *sk; | |
866 | ||
da99f056 | 867 | list_for_each_entry_safe(isk, n, &iucv_sk(parent)->accept_q, accept_q) { |
eac3731b JH |
868 | sk = (struct sock *) isk; |
869 | ||
870 | if (sk->sk_state == IUCV_CONNECTED) | |
871 | return POLLIN | POLLRDNORM; | |
872 | } | |
873 | ||
874 | return 0; | |
875 | } | |
876 | ||
877 | unsigned int iucv_sock_poll(struct file *file, struct socket *sock, | |
878 | poll_table *wait) | |
879 | { | |
880 | struct sock *sk = sock->sk; | |
881 | unsigned int mask = 0; | |
882 | ||
883 | poll_wait(file, sk->sk_sleep, wait); | |
884 | ||
885 | if (sk->sk_state == IUCV_LISTEN) | |
886 | return iucv_accept_poll(sk); | |
887 | ||
888 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
889 | mask |= POLLERR; | |
890 | ||
891 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
892 | mask |= POLLRDHUP; | |
893 | ||
894 | if (sk->sk_shutdown == SHUTDOWN_MASK) | |
895 | mask |= POLLHUP; | |
896 | ||
897 | if (!skb_queue_empty(&sk->sk_receive_queue) || | |
da99f056 | 898 | (sk->sk_shutdown & RCV_SHUTDOWN)) |
eac3731b JH |
899 | mask |= POLLIN | POLLRDNORM; |
900 | ||
901 | if (sk->sk_state == IUCV_CLOSED) | |
902 | mask |= POLLHUP; | |
903 | ||
561e0360 JH |
904 | if (sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_SEVERED) |
905 | mask |= POLLIN; | |
906 | ||
eac3731b JH |
907 | if (sock_writeable(sk)) |
908 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; | |
909 | else | |
910 | set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); | |
911 | ||
912 | return mask; | |
913 | } | |
914 | ||
915 | static int iucv_sock_shutdown(struct socket *sock, int how) | |
916 | { | |
917 | struct sock *sk = sock->sk; | |
918 | struct iucv_sock *iucv = iucv_sk(sk); | |
919 | struct iucv_message txmsg; | |
920 | int err = 0; | |
921 | u8 prmmsg[8] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}; | |
922 | ||
923 | how++; | |
924 | ||
925 | if ((how & ~SHUTDOWN_MASK) || !how) | |
926 | return -EINVAL; | |
927 | ||
928 | lock_sock(sk); | |
da99f056 | 929 | switch (sk->sk_state) { |
eac3731b JH |
930 | case IUCV_CLOSED: |
931 | err = -ENOTCONN; | |
932 | goto fail; | |
933 | ||
934 | default: | |
935 | sk->sk_shutdown |= how; | |
936 | break; | |
937 | } | |
938 | ||
939 | if (how == SEND_SHUTDOWN || how == SHUTDOWN_MASK) { | |
940 | txmsg.class = 0; | |
941 | txmsg.tag = 0; | |
942 | err = iucv_message_send(iucv->path, &txmsg, IUCV_IPRMDATA, 0, | |
943 | (void *) prmmsg, 8); | |
944 | if (err) { | |
da99f056 | 945 | switch (err) { |
eac3731b JH |
946 | case 1: |
947 | err = -ENOTCONN; | |
948 | break; | |
949 | case 2: | |
950 | err = -ECONNRESET; | |
951 | break; | |
952 | default: | |
953 | err = -ENOTCONN; | |
954 | break; | |
955 | } | |
956 | } | |
957 | } | |
958 | ||
959 | if (how == RCV_SHUTDOWN || how == SHUTDOWN_MASK) { | |
960 | err = iucv_path_quiesce(iucv_sk(sk)->path, NULL); | |
961 | if (err) | |
962 | err = -ENOTCONN; | |
963 | ||
964 | skb_queue_purge(&sk->sk_receive_queue); | |
965 | } | |
966 | ||
967 | /* Wake up anyone sleeping in poll */ | |
968 | sk->sk_state_change(sk); | |
969 | ||
970 | fail: | |
971 | release_sock(sk); | |
972 | return err; | |
973 | } | |
974 | ||
975 | static int iucv_sock_release(struct socket *sock) | |
976 | { | |
977 | struct sock *sk = sock->sk; | |
978 | int err = 0; | |
979 | ||
980 | if (!sk) | |
981 | return 0; | |
982 | ||
983 | iucv_sock_close(sk); | |
984 | ||
985 | /* Unregister with IUCV base support */ | |
986 | if (iucv_sk(sk)->path) { | |
987 | iucv_path_sever(iucv_sk(sk)->path, NULL); | |
988 | iucv_path_free(iucv_sk(sk)->path); | |
989 | iucv_sk(sk)->path = NULL; | |
990 | } | |
991 | ||
eac3731b JH |
992 | sock_orphan(sk); |
993 | iucv_sock_kill(sk); | |
994 | return err; | |
995 | } | |
996 | ||
997 | /* Callback wrappers - called from iucv base support */ | |
998 | static int iucv_callback_connreq(struct iucv_path *path, | |
999 | u8 ipvmid[8], u8 ipuser[16]) | |
1000 | { | |
1001 | unsigned char user_data[16]; | |
1002 | unsigned char nuser_data[16]; | |
1003 | unsigned char src_name[8]; | |
1004 | struct hlist_node *node; | |
1005 | struct sock *sk, *nsk; | |
1006 | struct iucv_sock *iucv, *niucv; | |
1007 | int err; | |
1008 | ||
1009 | memcpy(src_name, ipuser, 8); | |
1010 | EBCASC(src_name, 8); | |
1011 | /* Find out if this path belongs to af_iucv. */ | |
1012 | read_lock(&iucv_sk_list.lock); | |
1013 | iucv = NULL; | |
febca281 | 1014 | sk = NULL; |
eac3731b JH |
1015 | sk_for_each(sk, node, &iucv_sk_list.head) |
1016 | if (sk->sk_state == IUCV_LISTEN && | |
1017 | !memcmp(&iucv_sk(sk)->src_name, src_name, 8)) { | |
1018 | /* | |
1019 | * Found a listening socket with | |
1020 | * src_name == ipuser[0-7]. | |
1021 | */ | |
1022 | iucv = iucv_sk(sk); | |
1023 | break; | |
1024 | } | |
1025 | read_unlock(&iucv_sk_list.lock); | |
1026 | if (!iucv) | |
1027 | /* No socket found, not one of our paths. */ | |
1028 | return -EINVAL; | |
1029 | ||
1030 | bh_lock_sock(sk); | |
1031 | ||
1032 | /* Check if parent socket is listening */ | |
1033 | low_nmcpy(user_data, iucv->src_name); | |
1034 | high_nmcpy(user_data, iucv->dst_name); | |
1035 | ASCEBC(user_data, sizeof(user_data)); | |
1036 | if (sk->sk_state != IUCV_LISTEN) { | |
1037 | err = iucv_path_sever(path, user_data); | |
1038 | goto fail; | |
1039 | } | |
1040 | ||
1041 | /* Check for backlog size */ | |
1042 | if (sk_acceptq_is_full(sk)) { | |
1043 | err = iucv_path_sever(path, user_data); | |
1044 | goto fail; | |
1045 | } | |
1046 | ||
1047 | /* Create the new socket */ | |
1048 | nsk = iucv_sock_alloc(NULL, SOCK_STREAM, GFP_ATOMIC); | |
da99f056 | 1049 | if (!nsk) { |
eac3731b JH |
1050 | err = iucv_path_sever(path, user_data); |
1051 | goto fail; | |
1052 | } | |
1053 | ||
1054 | niucv = iucv_sk(nsk); | |
1055 | iucv_sock_init(nsk, sk); | |
1056 | ||
1057 | /* Set the new iucv_sock */ | |
1058 | memcpy(niucv->dst_name, ipuser + 8, 8); | |
1059 | EBCASC(niucv->dst_name, 8); | |
1060 | memcpy(niucv->dst_user_id, ipvmid, 8); | |
1061 | memcpy(niucv->src_name, iucv->src_name, 8); | |
1062 | memcpy(niucv->src_user_id, iucv->src_user_id, 8); | |
1063 | niucv->path = path; | |
1064 | ||
1065 | /* Call iucv_accept */ | |
1066 | high_nmcpy(nuser_data, ipuser + 8); | |
1067 | memcpy(nuser_data + 8, niucv->src_name, 8); | |
1068 | ASCEBC(nuser_data + 8, 8); | |
1069 | ||
1070 | path->msglim = IUCV_QUEUELEN_DEFAULT; | |
1071 | err = iucv_path_accept(path, &af_iucv_handler, nuser_data, nsk); | |
da99f056 | 1072 | if (err) { |
eac3731b JH |
1073 | err = iucv_path_sever(path, user_data); |
1074 | goto fail; | |
1075 | } | |
1076 | ||
1077 | iucv_accept_enqueue(sk, nsk); | |
1078 | ||
1079 | /* Wake up accept */ | |
1080 | nsk->sk_state = IUCV_CONNECTED; | |
1081 | sk->sk_data_ready(sk, 1); | |
1082 | err = 0; | |
1083 | fail: | |
1084 | bh_unlock_sock(sk); | |
1085 | return 0; | |
1086 | } | |
1087 | ||
1088 | static void iucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) | |
1089 | { | |
1090 | struct sock *sk = path->private; | |
1091 | ||
1092 | sk->sk_state = IUCV_CONNECTED; | |
1093 | sk->sk_state_change(sk); | |
1094 | } | |
1095 | ||
1096 | static void iucv_callback_rx(struct iucv_path *path, struct iucv_message *msg) | |
1097 | { | |
1098 | struct sock *sk = path->private; | |
561e0360 | 1099 | struct iucv_sock *iucv = iucv_sk(sk); |
f0703c80 UB |
1100 | struct sk_buff *skb; |
1101 | struct sock_msg_q *save_msg; | |
1102 | int len; | |
561e0360 | 1103 | |
eac3731b JH |
1104 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
1105 | return; | |
1106 | ||
f0703c80 UB |
1107 | if (!list_empty(&iucv->message_q.list) || |
1108 | !skb_queue_empty(&iucv->backlog_skb_q)) | |
1109 | goto save_message; | |
1110 | ||
1111 | len = atomic_read(&sk->sk_rmem_alloc); | |
1112 | len += msg->length + sizeof(struct sk_buff); | |
1113 | if (len > sk->sk_rcvbuf) | |
1114 | goto save_message; | |
1115 | ||
eac3731b | 1116 | skb = alloc_skb(msg->length, GFP_ATOMIC | GFP_DMA); |
f0703c80 UB |
1117 | if (!skb) |
1118 | goto save_message; | |
eac3731b | 1119 | |
f0703c80 UB |
1120 | spin_lock(&iucv->message_q.lock); |
1121 | iucv_process_message(sk, skb, path, msg); | |
1122 | spin_unlock(&iucv->message_q.lock); | |
eac3731b | 1123 | |
f0703c80 UB |
1124 | return; |
1125 | ||
1126 | save_message: | |
1127 | save_msg = kzalloc(sizeof(struct sock_msg_q), GFP_ATOMIC | GFP_DMA); | |
d4444722 UB |
1128 | if (!save_msg) |
1129 | return; | |
f0703c80 UB |
1130 | save_msg->path = path; |
1131 | save_msg->msg = *msg; | |
eac3731b | 1132 | |
f0703c80 UB |
1133 | spin_lock(&iucv->message_q.lock); |
1134 | list_add_tail(&save_msg->list, &iucv->message_q.list); | |
1135 | spin_unlock(&iucv->message_q.lock); | |
eac3731b JH |
1136 | } |
1137 | ||
1138 | static void iucv_callback_txdone(struct iucv_path *path, | |
1139 | struct iucv_message *msg) | |
1140 | { | |
1141 | struct sock *sk = path->private; | |
f2a77991 | 1142 | struct sk_buff *this = NULL; |
eac3731b JH |
1143 | struct sk_buff_head *list = &iucv_sk(sk)->send_skb_q; |
1144 | struct sk_buff *list_skb = list->next; | |
1145 | unsigned long flags; | |
1146 | ||
f2a77991 | 1147 | if (!skb_queue_empty(list)) { |
561e0360 JH |
1148 | spin_lock_irqsave(&list->lock, flags); |
1149 | ||
f2a77991 UB |
1150 | while (list_skb != (struct sk_buff *)list) { |
1151 | if (!memcmp(&msg->tag, list_skb->cb, 4)) { | |
1152 | this = list_skb; | |
1153 | break; | |
1154 | } | |
561e0360 | 1155 | list_skb = list_skb->next; |
f2a77991 UB |
1156 | } |
1157 | if (this) | |
1158 | __skb_unlink(this, list); | |
561e0360 JH |
1159 | |
1160 | spin_unlock_irqrestore(&list->lock, flags); | |
eac3731b | 1161 | |
f2a77991 UB |
1162 | if (this) |
1163 | kfree_skb(this); | |
561e0360 | 1164 | } |
c2b4afd2 | 1165 | BUG_ON(!this); |
eac3731b | 1166 | |
da99f056 | 1167 | if (sk->sk_state == IUCV_CLOSING) { |
561e0360 JH |
1168 | if (skb_queue_empty(&iucv_sk(sk)->send_skb_q)) { |
1169 | sk->sk_state = IUCV_CLOSED; | |
1170 | sk->sk_state_change(sk); | |
1171 | } | |
1172 | } | |
eac3731b | 1173 | |
eac3731b JH |
1174 | } |
1175 | ||
1176 | static void iucv_callback_connrej(struct iucv_path *path, u8 ipuser[16]) | |
1177 | { | |
1178 | struct sock *sk = path->private; | |
1179 | ||
1180 | if (!list_empty(&iucv_sk(sk)->accept_q)) | |
1181 | sk->sk_state = IUCV_SEVERED; | |
1182 | else | |
1183 | sk->sk_state = IUCV_DISCONN; | |
1184 | ||
1185 | sk->sk_state_change(sk); | |
1186 | } | |
1187 | ||
1188 | static struct proto_ops iucv_sock_ops = { | |
1189 | .family = PF_IUCV, | |
1190 | .owner = THIS_MODULE, | |
1191 | .release = iucv_sock_release, | |
1192 | .bind = iucv_sock_bind, | |
1193 | .connect = iucv_sock_connect, | |
1194 | .listen = iucv_sock_listen, | |
1195 | .accept = iucv_sock_accept, | |
1196 | .getname = iucv_sock_getname, | |
1197 | .sendmsg = iucv_sock_sendmsg, | |
1198 | .recvmsg = iucv_sock_recvmsg, | |
1199 | .poll = iucv_sock_poll, | |
1200 | .ioctl = sock_no_ioctl, | |
1201 | .mmap = sock_no_mmap, | |
1202 | .socketpair = sock_no_socketpair, | |
1203 | .shutdown = iucv_sock_shutdown, | |
1204 | .setsockopt = sock_no_setsockopt, | |
1205 | .getsockopt = sock_no_getsockopt | |
1206 | }; | |
1207 | ||
1208 | static struct net_proto_family iucv_sock_family_ops = { | |
1209 | .family = AF_IUCV, | |
1210 | .owner = THIS_MODULE, | |
1211 | .create = iucv_sock_create, | |
1212 | }; | |
1213 | ||
da99f056 | 1214 | static int __init afiucv_init(void) |
eac3731b JH |
1215 | { |
1216 | int err; | |
1217 | ||
1218 | if (!MACHINE_IS_VM) { | |
8f7c502c UB |
1219 | pr_err("The af_iucv module cannot be loaded" |
1220 | " without z/VM\n"); | |
eac3731b JH |
1221 | err = -EPROTONOSUPPORT; |
1222 | goto out; | |
1223 | } | |
1224 | cpcmd("QUERY USERID", iucv_userid, sizeof(iucv_userid), &err); | |
1225 | if (unlikely(err)) { | |
c2b4afd2 | 1226 | WARN_ON(err); |
eac3731b JH |
1227 | err = -EPROTONOSUPPORT; |
1228 | goto out; | |
1229 | } | |
1230 | ||
1231 | err = iucv_register(&af_iucv_handler, 0); | |
1232 | if (err) | |
1233 | goto out; | |
1234 | err = proto_register(&iucv_proto, 0); | |
1235 | if (err) | |
1236 | goto out_iucv; | |
1237 | err = sock_register(&iucv_sock_family_ops); | |
1238 | if (err) | |
1239 | goto out_proto; | |
eac3731b JH |
1240 | return 0; |
1241 | ||
1242 | out_proto: | |
1243 | proto_unregister(&iucv_proto); | |
1244 | out_iucv: | |
1245 | iucv_unregister(&af_iucv_handler, 0); | |
1246 | out: | |
1247 | return err; | |
1248 | } | |
1249 | ||
1250 | static void __exit afiucv_exit(void) | |
1251 | { | |
1252 | sock_unregister(PF_IUCV); | |
1253 | proto_unregister(&iucv_proto); | |
1254 | iucv_unregister(&af_iucv_handler, 0); | |
eac3731b JH |
1255 | } |
1256 | ||
1257 | module_init(afiucv_init); | |
1258 | module_exit(afiucv_exit); | |
1259 | ||
1260 | MODULE_AUTHOR("Jennifer Hunt <jenhunt@us.ibm.com>"); | |
1261 | MODULE_DESCRIPTION("IUCV Sockets ver " VERSION); | |
1262 | MODULE_VERSION(VERSION); | |
1263 | MODULE_LICENSE("GPL"); | |
1264 | MODULE_ALIAS_NETPROTO(PF_IUCV); |