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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 | ||
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 | } | |
18becbc5 UB |
524 | |
525 | if (err) { | |
526 | iucv_path_sever(iucv->path, NULL); | |
527 | iucv_path_free(iucv->path); | |
528 | iucv->path = NULL; | |
529 | } | |
530 | ||
eac3731b JH |
531 | done: |
532 | release_sock(sk); | |
533 | return err; | |
534 | } | |
535 | ||
536 | /* Move a socket into listening state. */ | |
537 | static int iucv_sock_listen(struct socket *sock, int backlog) | |
538 | { | |
539 | struct sock *sk = sock->sk; | |
540 | int err; | |
541 | ||
542 | lock_sock(sk); | |
543 | ||
544 | err = -EINVAL; | |
545 | if (sk->sk_state != IUCV_BOUND || sock->type != SOCK_STREAM) | |
546 | goto done; | |
547 | ||
548 | sk->sk_max_ack_backlog = backlog; | |
549 | sk->sk_ack_backlog = 0; | |
550 | sk->sk_state = IUCV_LISTEN; | |
551 | err = 0; | |
552 | ||
553 | done: | |
554 | release_sock(sk); | |
555 | return err; | |
556 | } | |
557 | ||
558 | /* Accept a pending connection */ | |
559 | static int iucv_sock_accept(struct socket *sock, struct socket *newsock, | |
560 | int flags) | |
561 | { | |
562 | DECLARE_WAITQUEUE(wait, current); | |
563 | struct sock *sk = sock->sk, *nsk; | |
564 | long timeo; | |
565 | int err = 0; | |
566 | ||
561e0360 | 567 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
eac3731b JH |
568 | |
569 | if (sk->sk_state != IUCV_LISTEN) { | |
570 | err = -EBADFD; | |
571 | goto done; | |
572 | } | |
573 | ||
574 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
575 | ||
576 | /* Wait for an incoming connection */ | |
577 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
da99f056 | 578 | while (!(nsk = iucv_accept_dequeue(sk, newsock))) { |
eac3731b JH |
579 | set_current_state(TASK_INTERRUPTIBLE); |
580 | if (!timeo) { | |
581 | err = -EAGAIN; | |
582 | break; | |
583 | } | |
584 | ||
585 | release_sock(sk); | |
586 | timeo = schedule_timeout(timeo); | |
561e0360 | 587 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
eac3731b JH |
588 | |
589 | if (sk->sk_state != IUCV_LISTEN) { | |
590 | err = -EBADFD; | |
591 | break; | |
592 | } | |
593 | ||
594 | if (signal_pending(current)) { | |
595 | err = sock_intr_errno(timeo); | |
596 | break; | |
597 | } | |
598 | } | |
599 | ||
600 | set_current_state(TASK_RUNNING); | |
601 | remove_wait_queue(sk->sk_sleep, &wait); | |
602 | ||
603 | if (err) | |
604 | goto done; | |
605 | ||
606 | newsock->state = SS_CONNECTED; | |
607 | ||
608 | done: | |
609 | release_sock(sk); | |
610 | return err; | |
611 | } | |
612 | ||
613 | static int iucv_sock_getname(struct socket *sock, struct sockaddr *addr, | |
614 | int *len, int peer) | |
615 | { | |
616 | struct sockaddr_iucv *siucv = (struct sockaddr_iucv *) addr; | |
617 | struct sock *sk = sock->sk; | |
618 | ||
619 | addr->sa_family = AF_IUCV; | |
620 | *len = sizeof(struct sockaddr_iucv); | |
621 | ||
622 | if (peer) { | |
623 | memcpy(siucv->siucv_user_id, iucv_sk(sk)->dst_user_id, 8); | |
624 | memcpy(siucv->siucv_name, &iucv_sk(sk)->dst_name, 8); | |
625 | } else { | |
626 | memcpy(siucv->siucv_user_id, iucv_sk(sk)->src_user_id, 8); | |
627 | memcpy(siucv->siucv_name, iucv_sk(sk)->src_name, 8); | |
628 | } | |
629 | memset(&siucv->siucv_port, 0, sizeof(siucv->siucv_port)); | |
630 | memset(&siucv->siucv_addr, 0, sizeof(siucv->siucv_addr)); | |
631 | memset(siucv->siucv_nodeid, 0, sizeof(siucv->siucv_nodeid)); | |
632 | ||
633 | return 0; | |
634 | } | |
635 | ||
636 | static int iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock, | |
637 | struct msghdr *msg, size_t len) | |
638 | { | |
639 | struct sock *sk = sock->sk; | |
640 | struct iucv_sock *iucv = iucv_sk(sk); | |
641 | struct sk_buff *skb; | |
642 | struct iucv_message txmsg; | |
8f7c502c UB |
643 | char user_id[9]; |
644 | char appl_id[9]; | |
eac3731b JH |
645 | int err; |
646 | ||
647 | err = sock_error(sk); | |
648 | if (err) | |
649 | return err; | |
650 | ||
651 | if (msg->msg_flags & MSG_OOB) | |
652 | return -EOPNOTSUPP; | |
653 | ||
654 | lock_sock(sk); | |
655 | ||
656 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
657 | err = -EPIPE; | |
658 | goto out; | |
659 | } | |
660 | ||
da99f056 HC |
661 | if (sk->sk_state == IUCV_CONNECTED) { |
662 | if (!(skb = sock_alloc_send_skb(sk, len, | |
663 | msg->msg_flags & MSG_DONTWAIT, | |
664 | &err))) | |
561e0360 | 665 | goto out; |
eac3731b | 666 | |
da99f056 | 667 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { |
eac3731b JH |
668 | err = -EFAULT; |
669 | goto fail; | |
670 | } | |
671 | ||
672 | txmsg.class = 0; | |
469689a4 | 673 | memcpy(&txmsg.class, skb->data, skb->len >= 4 ? 4 : skb->len); |
eac3731b JH |
674 | txmsg.tag = iucv->send_tag++; |
675 | memcpy(skb->cb, &txmsg.tag, 4); | |
676 | skb_queue_tail(&iucv->send_skb_q, skb); | |
677 | err = iucv_message_send(iucv->path, &txmsg, 0, 0, | |
678 | (void *) skb->data, skb->len); | |
679 | if (err) { | |
8f7c502c UB |
680 | if (err == 3) { |
681 | user_id[8] = 0; | |
682 | memcpy(user_id, iucv->dst_user_id, 8); | |
683 | appl_id[8] = 0; | |
684 | memcpy(appl_id, iucv->dst_name, 8); | |
685 | pr_err("Application %s on z/VM guest %s" | |
686 | " exceeds message limit\n", | |
687 | user_id, appl_id); | |
688 | } | |
eac3731b JH |
689 | skb_unlink(skb, &iucv->send_skb_q); |
690 | err = -EPIPE; | |
691 | goto fail; | |
692 | } | |
693 | ||
694 | } else { | |
695 | err = -ENOTCONN; | |
696 | goto out; | |
697 | } | |
698 | ||
699 | release_sock(sk); | |
700 | return len; | |
701 | ||
702 | fail: | |
703 | kfree_skb(skb); | |
704 | out: | |
705 | release_sock(sk); | |
706 | return err; | |
707 | } | |
708 | ||
f0703c80 UB |
709 | static int iucv_fragment_skb(struct sock *sk, struct sk_buff *skb, int len) |
710 | { | |
711 | int dataleft, size, copied = 0; | |
712 | struct sk_buff *nskb; | |
713 | ||
714 | dataleft = len; | |
715 | while (dataleft) { | |
716 | if (dataleft >= sk->sk_rcvbuf / 4) | |
717 | size = sk->sk_rcvbuf / 4; | |
718 | else | |
719 | size = dataleft; | |
720 | ||
721 | nskb = alloc_skb(size, GFP_ATOMIC | GFP_DMA); | |
722 | if (!nskb) | |
723 | return -ENOMEM; | |
724 | ||
725 | memcpy(nskb->data, skb->data + copied, size); | |
726 | copied += size; | |
727 | dataleft -= size; | |
728 | ||
729 | skb_reset_transport_header(nskb); | |
730 | skb_reset_network_header(nskb); | |
731 | nskb->len = size; | |
732 | ||
733 | skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, nskb); | |
734 | } | |
735 | ||
736 | return 0; | |
737 | } | |
738 | ||
739 | static void iucv_process_message(struct sock *sk, struct sk_buff *skb, | |
740 | struct iucv_path *path, | |
741 | struct iucv_message *msg) | |
742 | { | |
743 | int rc; | |
744 | ||
745 | if (msg->flags & IPRMDATA) { | |
746 | skb->data = NULL; | |
747 | skb->len = 0; | |
748 | } else { | |
749 | rc = iucv_message_receive(path, msg, 0, skb->data, | |
750 | msg->length, NULL); | |
751 | if (rc) { | |
752 | kfree_skb(skb); | |
753 | return; | |
754 | } | |
755 | if (skb->truesize >= sk->sk_rcvbuf / 4) { | |
756 | rc = iucv_fragment_skb(sk, skb, msg->length); | |
757 | kfree_skb(skb); | |
758 | skb = NULL; | |
759 | if (rc) { | |
760 | iucv_path_sever(path, NULL); | |
761 | return; | |
762 | } | |
763 | skb = skb_dequeue(&iucv_sk(sk)->backlog_skb_q); | |
764 | } else { | |
765 | skb_reset_transport_header(skb); | |
766 | skb_reset_network_header(skb); | |
767 | skb->len = msg->length; | |
768 | } | |
769 | } | |
770 | ||
771 | if (sock_queue_rcv_skb(sk, skb)) | |
772 | skb_queue_head(&iucv_sk(sk)->backlog_skb_q, skb); | |
773 | } | |
774 | ||
775 | static void iucv_process_message_q(struct sock *sk) | |
776 | { | |
777 | struct iucv_sock *iucv = iucv_sk(sk); | |
778 | struct sk_buff *skb; | |
779 | struct sock_msg_q *p, *n; | |
780 | ||
781 | list_for_each_entry_safe(p, n, &iucv->message_q.list, list) { | |
782 | skb = alloc_skb(p->msg.length, GFP_ATOMIC | GFP_DMA); | |
783 | if (!skb) | |
784 | break; | |
785 | iucv_process_message(sk, skb, p->path, &p->msg); | |
786 | list_del(&p->list); | |
787 | kfree(p); | |
788 | if (!skb_queue_empty(&iucv->backlog_skb_q)) | |
789 | break; | |
790 | } | |
791 | } | |
792 | ||
eac3731b JH |
793 | static int iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
794 | struct msghdr *msg, size_t len, int flags) | |
795 | { | |
796 | int noblock = flags & MSG_DONTWAIT; | |
797 | struct sock *sk = sock->sk; | |
561e0360 | 798 | struct iucv_sock *iucv = iucv_sk(sk); |
eac3731b | 799 | int target, copied = 0; |
561e0360 | 800 | struct sk_buff *skb, *rskb, *cskb; |
eac3731b JH |
801 | int err = 0; |
802 | ||
561e0360 | 803 | if ((sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_SEVERED) && |
f0703c80 UB |
804 | skb_queue_empty(&iucv->backlog_skb_q) && |
805 | skb_queue_empty(&sk->sk_receive_queue) && | |
806 | list_empty(&iucv->message_q.list)) | |
561e0360 JH |
807 | return 0; |
808 | ||
eac3731b JH |
809 | if (flags & (MSG_OOB)) |
810 | return -EOPNOTSUPP; | |
811 | ||
812 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, len); | |
813 | ||
814 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
815 | if (!skb) { | |
816 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
817 | return 0; | |
818 | return err; | |
819 | } | |
820 | ||
821 | copied = min_t(unsigned int, skb->len, len); | |
822 | ||
561e0360 JH |
823 | cskb = skb; |
824 | if (memcpy_toiovec(msg->msg_iov, cskb->data, copied)) { | |
eac3731b JH |
825 | skb_queue_head(&sk->sk_receive_queue, skb); |
826 | if (copied == 0) | |
827 | return -EFAULT; | |
561e0360 | 828 | goto done; |
eac3731b JH |
829 | } |
830 | ||
831 | len -= copied; | |
832 | ||
833 | /* Mark read part of skb as used */ | |
834 | if (!(flags & MSG_PEEK)) { | |
835 | skb_pull(skb, copied); | |
836 | ||
837 | if (skb->len) { | |
838 | skb_queue_head(&sk->sk_receive_queue, skb); | |
839 | goto done; | |
840 | } | |
841 | ||
842 | kfree_skb(skb); | |
561e0360 JH |
843 | |
844 | /* Queue backlog skbs */ | |
f0703c80 | 845 | rskb = skb_dequeue(&iucv->backlog_skb_q); |
da99f056 | 846 | while (rskb) { |
561e0360 | 847 | if (sock_queue_rcv_skb(sk, rskb)) { |
f0703c80 | 848 | skb_queue_head(&iucv->backlog_skb_q, |
561e0360 JH |
849 | rskb); |
850 | break; | |
851 | } else { | |
f0703c80 | 852 | rskb = skb_dequeue(&iucv->backlog_skb_q); |
561e0360 JH |
853 | } |
854 | } | |
f0703c80 UB |
855 | if (skb_queue_empty(&iucv->backlog_skb_q)) { |
856 | spin_lock_bh(&iucv->message_q.lock); | |
857 | if (!list_empty(&iucv->message_q.list)) | |
858 | iucv_process_message_q(sk); | |
859 | spin_unlock_bh(&iucv->message_q.lock); | |
860 | } | |
861 | ||
eac3731b JH |
862 | } else |
863 | skb_queue_head(&sk->sk_receive_queue, skb); | |
864 | ||
865 | done: | |
866 | return err ? : copied; | |
867 | } | |
868 | ||
869 | static inline unsigned int iucv_accept_poll(struct sock *parent) | |
870 | { | |
871 | struct iucv_sock *isk, *n; | |
872 | struct sock *sk; | |
873 | ||
da99f056 | 874 | list_for_each_entry_safe(isk, n, &iucv_sk(parent)->accept_q, accept_q) { |
eac3731b JH |
875 | sk = (struct sock *) isk; |
876 | ||
877 | if (sk->sk_state == IUCV_CONNECTED) | |
878 | return POLLIN | POLLRDNORM; | |
879 | } | |
880 | ||
881 | return 0; | |
882 | } | |
883 | ||
884 | unsigned int iucv_sock_poll(struct file *file, struct socket *sock, | |
885 | poll_table *wait) | |
886 | { | |
887 | struct sock *sk = sock->sk; | |
888 | unsigned int mask = 0; | |
889 | ||
890 | poll_wait(file, sk->sk_sleep, wait); | |
891 | ||
892 | if (sk->sk_state == IUCV_LISTEN) | |
893 | return iucv_accept_poll(sk); | |
894 | ||
895 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
896 | mask |= POLLERR; | |
897 | ||
898 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
899 | mask |= POLLRDHUP; | |
900 | ||
901 | if (sk->sk_shutdown == SHUTDOWN_MASK) | |
902 | mask |= POLLHUP; | |
903 | ||
904 | if (!skb_queue_empty(&sk->sk_receive_queue) || | |
da99f056 | 905 | (sk->sk_shutdown & RCV_SHUTDOWN)) |
eac3731b JH |
906 | mask |= POLLIN | POLLRDNORM; |
907 | ||
908 | if (sk->sk_state == IUCV_CLOSED) | |
909 | mask |= POLLHUP; | |
910 | ||
561e0360 JH |
911 | if (sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_SEVERED) |
912 | mask |= POLLIN; | |
913 | ||
eac3731b JH |
914 | if (sock_writeable(sk)) |
915 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; | |
916 | else | |
917 | set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); | |
918 | ||
919 | return mask; | |
920 | } | |
921 | ||
922 | static int iucv_sock_shutdown(struct socket *sock, int how) | |
923 | { | |
924 | struct sock *sk = sock->sk; | |
925 | struct iucv_sock *iucv = iucv_sk(sk); | |
926 | struct iucv_message txmsg; | |
927 | int err = 0; | |
928 | u8 prmmsg[8] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}; | |
929 | ||
930 | how++; | |
931 | ||
932 | if ((how & ~SHUTDOWN_MASK) || !how) | |
933 | return -EINVAL; | |
934 | ||
935 | lock_sock(sk); | |
da99f056 | 936 | switch (sk->sk_state) { |
eac3731b JH |
937 | case IUCV_CLOSED: |
938 | err = -ENOTCONN; | |
939 | goto fail; | |
940 | ||
941 | default: | |
942 | sk->sk_shutdown |= how; | |
943 | break; | |
944 | } | |
945 | ||
946 | if (how == SEND_SHUTDOWN || how == SHUTDOWN_MASK) { | |
947 | txmsg.class = 0; | |
948 | txmsg.tag = 0; | |
949 | err = iucv_message_send(iucv->path, &txmsg, IUCV_IPRMDATA, 0, | |
950 | (void *) prmmsg, 8); | |
951 | if (err) { | |
da99f056 | 952 | switch (err) { |
eac3731b JH |
953 | case 1: |
954 | err = -ENOTCONN; | |
955 | break; | |
956 | case 2: | |
957 | err = -ECONNRESET; | |
958 | break; | |
959 | default: | |
960 | err = -ENOTCONN; | |
961 | break; | |
962 | } | |
963 | } | |
964 | } | |
965 | ||
966 | if (how == RCV_SHUTDOWN || how == SHUTDOWN_MASK) { | |
967 | err = iucv_path_quiesce(iucv_sk(sk)->path, NULL); | |
968 | if (err) | |
969 | err = -ENOTCONN; | |
970 | ||
971 | skb_queue_purge(&sk->sk_receive_queue); | |
972 | } | |
973 | ||
974 | /* Wake up anyone sleeping in poll */ | |
975 | sk->sk_state_change(sk); | |
976 | ||
977 | fail: | |
978 | release_sock(sk); | |
979 | return err; | |
980 | } | |
981 | ||
982 | static int iucv_sock_release(struct socket *sock) | |
983 | { | |
984 | struct sock *sk = sock->sk; | |
985 | int err = 0; | |
986 | ||
987 | if (!sk) | |
988 | return 0; | |
989 | ||
990 | iucv_sock_close(sk); | |
991 | ||
992 | /* Unregister with IUCV base support */ | |
993 | if (iucv_sk(sk)->path) { | |
994 | iucv_path_sever(iucv_sk(sk)->path, NULL); | |
995 | iucv_path_free(iucv_sk(sk)->path); | |
996 | iucv_sk(sk)->path = NULL; | |
997 | } | |
998 | ||
eac3731b JH |
999 | sock_orphan(sk); |
1000 | iucv_sock_kill(sk); | |
1001 | return err; | |
1002 | } | |
1003 | ||
1004 | /* Callback wrappers - called from iucv base support */ | |
1005 | static int iucv_callback_connreq(struct iucv_path *path, | |
1006 | u8 ipvmid[8], u8 ipuser[16]) | |
1007 | { | |
1008 | unsigned char user_data[16]; | |
1009 | unsigned char nuser_data[16]; | |
1010 | unsigned char src_name[8]; | |
1011 | struct hlist_node *node; | |
1012 | struct sock *sk, *nsk; | |
1013 | struct iucv_sock *iucv, *niucv; | |
1014 | int err; | |
1015 | ||
1016 | memcpy(src_name, ipuser, 8); | |
1017 | EBCASC(src_name, 8); | |
1018 | /* Find out if this path belongs to af_iucv. */ | |
1019 | read_lock(&iucv_sk_list.lock); | |
1020 | iucv = NULL; | |
febca281 | 1021 | sk = NULL; |
eac3731b JH |
1022 | sk_for_each(sk, node, &iucv_sk_list.head) |
1023 | if (sk->sk_state == IUCV_LISTEN && | |
1024 | !memcmp(&iucv_sk(sk)->src_name, src_name, 8)) { | |
1025 | /* | |
1026 | * Found a listening socket with | |
1027 | * src_name == ipuser[0-7]. | |
1028 | */ | |
1029 | iucv = iucv_sk(sk); | |
1030 | break; | |
1031 | } | |
1032 | read_unlock(&iucv_sk_list.lock); | |
1033 | if (!iucv) | |
1034 | /* No socket found, not one of our paths. */ | |
1035 | return -EINVAL; | |
1036 | ||
1037 | bh_lock_sock(sk); | |
1038 | ||
1039 | /* Check if parent socket is listening */ | |
1040 | low_nmcpy(user_data, iucv->src_name); | |
1041 | high_nmcpy(user_data, iucv->dst_name); | |
1042 | ASCEBC(user_data, sizeof(user_data)); | |
1043 | if (sk->sk_state != IUCV_LISTEN) { | |
1044 | err = iucv_path_sever(path, user_data); | |
65dbd7c2 | 1045 | iucv_path_free(path); |
eac3731b JH |
1046 | goto fail; |
1047 | } | |
1048 | ||
1049 | /* Check for backlog size */ | |
1050 | if (sk_acceptq_is_full(sk)) { | |
1051 | err = iucv_path_sever(path, user_data); | |
65dbd7c2 | 1052 | iucv_path_free(path); |
eac3731b JH |
1053 | goto fail; |
1054 | } | |
1055 | ||
1056 | /* Create the new socket */ | |
1057 | nsk = iucv_sock_alloc(NULL, SOCK_STREAM, GFP_ATOMIC); | |
da99f056 | 1058 | if (!nsk) { |
eac3731b | 1059 | err = iucv_path_sever(path, user_data); |
65dbd7c2 | 1060 | iucv_path_free(path); |
eac3731b JH |
1061 | goto fail; |
1062 | } | |
1063 | ||
1064 | niucv = iucv_sk(nsk); | |
1065 | iucv_sock_init(nsk, sk); | |
1066 | ||
1067 | /* Set the new iucv_sock */ | |
1068 | memcpy(niucv->dst_name, ipuser + 8, 8); | |
1069 | EBCASC(niucv->dst_name, 8); | |
1070 | memcpy(niucv->dst_user_id, ipvmid, 8); | |
1071 | memcpy(niucv->src_name, iucv->src_name, 8); | |
1072 | memcpy(niucv->src_user_id, iucv->src_user_id, 8); | |
1073 | niucv->path = path; | |
1074 | ||
1075 | /* Call iucv_accept */ | |
1076 | high_nmcpy(nuser_data, ipuser + 8); | |
1077 | memcpy(nuser_data + 8, niucv->src_name, 8); | |
1078 | ASCEBC(nuser_data + 8, 8); | |
1079 | ||
1080 | path->msglim = IUCV_QUEUELEN_DEFAULT; | |
1081 | err = iucv_path_accept(path, &af_iucv_handler, nuser_data, nsk); | |
da99f056 | 1082 | if (err) { |
eac3731b | 1083 | err = iucv_path_sever(path, user_data); |
65dbd7c2 HB |
1084 | iucv_path_free(path); |
1085 | iucv_sock_kill(nsk); | |
eac3731b JH |
1086 | goto fail; |
1087 | } | |
1088 | ||
1089 | iucv_accept_enqueue(sk, nsk); | |
1090 | ||
1091 | /* Wake up accept */ | |
1092 | nsk->sk_state = IUCV_CONNECTED; | |
1093 | sk->sk_data_ready(sk, 1); | |
1094 | err = 0; | |
1095 | fail: | |
1096 | bh_unlock_sock(sk); | |
1097 | return 0; | |
1098 | } | |
1099 | ||
1100 | static void iucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) | |
1101 | { | |
1102 | struct sock *sk = path->private; | |
1103 | ||
1104 | sk->sk_state = IUCV_CONNECTED; | |
1105 | sk->sk_state_change(sk); | |
1106 | } | |
1107 | ||
1108 | static void iucv_callback_rx(struct iucv_path *path, struct iucv_message *msg) | |
1109 | { | |
1110 | struct sock *sk = path->private; | |
561e0360 | 1111 | struct iucv_sock *iucv = iucv_sk(sk); |
f0703c80 UB |
1112 | struct sk_buff *skb; |
1113 | struct sock_msg_q *save_msg; | |
1114 | int len; | |
561e0360 | 1115 | |
eac3731b JH |
1116 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
1117 | return; | |
1118 | ||
f0703c80 UB |
1119 | if (!list_empty(&iucv->message_q.list) || |
1120 | !skb_queue_empty(&iucv->backlog_skb_q)) | |
1121 | goto save_message; | |
1122 | ||
1123 | len = atomic_read(&sk->sk_rmem_alloc); | |
1124 | len += msg->length + sizeof(struct sk_buff); | |
1125 | if (len > sk->sk_rcvbuf) | |
1126 | goto save_message; | |
1127 | ||
eac3731b | 1128 | skb = alloc_skb(msg->length, GFP_ATOMIC | GFP_DMA); |
f0703c80 UB |
1129 | if (!skb) |
1130 | goto save_message; | |
eac3731b | 1131 | |
f0703c80 UB |
1132 | spin_lock(&iucv->message_q.lock); |
1133 | iucv_process_message(sk, skb, path, msg); | |
1134 | spin_unlock(&iucv->message_q.lock); | |
eac3731b | 1135 | |
f0703c80 UB |
1136 | return; |
1137 | ||
1138 | save_message: | |
1139 | save_msg = kzalloc(sizeof(struct sock_msg_q), GFP_ATOMIC | GFP_DMA); | |
d4444722 UB |
1140 | if (!save_msg) |
1141 | return; | |
f0703c80 UB |
1142 | save_msg->path = path; |
1143 | save_msg->msg = *msg; | |
eac3731b | 1144 | |
f0703c80 UB |
1145 | spin_lock(&iucv->message_q.lock); |
1146 | list_add_tail(&save_msg->list, &iucv->message_q.list); | |
1147 | spin_unlock(&iucv->message_q.lock); | |
eac3731b JH |
1148 | } |
1149 | ||
1150 | static void iucv_callback_txdone(struct iucv_path *path, | |
1151 | struct iucv_message *msg) | |
1152 | { | |
1153 | struct sock *sk = path->private; | |
f2a77991 | 1154 | struct sk_buff *this = NULL; |
eac3731b JH |
1155 | struct sk_buff_head *list = &iucv_sk(sk)->send_skb_q; |
1156 | struct sk_buff *list_skb = list->next; | |
1157 | unsigned long flags; | |
1158 | ||
f2a77991 | 1159 | if (!skb_queue_empty(list)) { |
561e0360 JH |
1160 | spin_lock_irqsave(&list->lock, flags); |
1161 | ||
f2a77991 UB |
1162 | while (list_skb != (struct sk_buff *)list) { |
1163 | if (!memcmp(&msg->tag, list_skb->cb, 4)) { | |
1164 | this = list_skb; | |
1165 | break; | |
1166 | } | |
561e0360 | 1167 | list_skb = list_skb->next; |
f2a77991 UB |
1168 | } |
1169 | if (this) | |
1170 | __skb_unlink(this, list); | |
561e0360 JH |
1171 | |
1172 | spin_unlock_irqrestore(&list->lock, flags); | |
eac3731b | 1173 | |
47a30b26 | 1174 | kfree_skb(this); |
561e0360 | 1175 | } |
c2b4afd2 | 1176 | BUG_ON(!this); |
eac3731b | 1177 | |
da99f056 | 1178 | if (sk->sk_state == IUCV_CLOSING) { |
561e0360 JH |
1179 | if (skb_queue_empty(&iucv_sk(sk)->send_skb_q)) { |
1180 | sk->sk_state = IUCV_CLOSED; | |
1181 | sk->sk_state_change(sk); | |
1182 | } | |
1183 | } | |
eac3731b | 1184 | |
eac3731b JH |
1185 | } |
1186 | ||
1187 | static void iucv_callback_connrej(struct iucv_path *path, u8 ipuser[16]) | |
1188 | { | |
1189 | struct sock *sk = path->private; | |
1190 | ||
1191 | if (!list_empty(&iucv_sk(sk)->accept_q)) | |
1192 | sk->sk_state = IUCV_SEVERED; | |
1193 | else | |
1194 | sk->sk_state = IUCV_DISCONN; | |
1195 | ||
1196 | sk->sk_state_change(sk); | |
1197 | } | |
1198 | ||
1199 | static struct proto_ops iucv_sock_ops = { | |
1200 | .family = PF_IUCV, | |
1201 | .owner = THIS_MODULE, | |
1202 | .release = iucv_sock_release, | |
1203 | .bind = iucv_sock_bind, | |
1204 | .connect = iucv_sock_connect, | |
1205 | .listen = iucv_sock_listen, | |
1206 | .accept = iucv_sock_accept, | |
1207 | .getname = iucv_sock_getname, | |
1208 | .sendmsg = iucv_sock_sendmsg, | |
1209 | .recvmsg = iucv_sock_recvmsg, | |
1210 | .poll = iucv_sock_poll, | |
1211 | .ioctl = sock_no_ioctl, | |
1212 | .mmap = sock_no_mmap, | |
1213 | .socketpair = sock_no_socketpair, | |
1214 | .shutdown = iucv_sock_shutdown, | |
1215 | .setsockopt = sock_no_setsockopt, | |
1216 | .getsockopt = sock_no_getsockopt | |
1217 | }; | |
1218 | ||
1219 | static struct net_proto_family iucv_sock_family_ops = { | |
1220 | .family = AF_IUCV, | |
1221 | .owner = THIS_MODULE, | |
1222 | .create = iucv_sock_create, | |
1223 | }; | |
1224 | ||
da99f056 | 1225 | static int __init afiucv_init(void) |
eac3731b JH |
1226 | { |
1227 | int err; | |
1228 | ||
1229 | if (!MACHINE_IS_VM) { | |
8f7c502c UB |
1230 | pr_err("The af_iucv module cannot be loaded" |
1231 | " without z/VM\n"); | |
eac3731b JH |
1232 | err = -EPROTONOSUPPORT; |
1233 | goto out; | |
1234 | } | |
1235 | cpcmd("QUERY USERID", iucv_userid, sizeof(iucv_userid), &err); | |
1236 | if (unlikely(err)) { | |
c2b4afd2 | 1237 | WARN_ON(err); |
eac3731b JH |
1238 | err = -EPROTONOSUPPORT; |
1239 | goto out; | |
1240 | } | |
1241 | ||
1242 | err = iucv_register(&af_iucv_handler, 0); | |
1243 | if (err) | |
1244 | goto out; | |
1245 | err = proto_register(&iucv_proto, 0); | |
1246 | if (err) | |
1247 | goto out_iucv; | |
1248 | err = sock_register(&iucv_sock_family_ops); | |
1249 | if (err) | |
1250 | goto out_proto; | |
eac3731b JH |
1251 | return 0; |
1252 | ||
1253 | out_proto: | |
1254 | proto_unregister(&iucv_proto); | |
1255 | out_iucv: | |
1256 | iucv_unregister(&af_iucv_handler, 0); | |
1257 | out: | |
1258 | return err; | |
1259 | } | |
1260 | ||
1261 | static void __exit afiucv_exit(void) | |
1262 | { | |
1263 | sock_unregister(PF_IUCV); | |
1264 | proto_unregister(&iucv_proto); | |
1265 | iucv_unregister(&af_iucv_handler, 0); | |
eac3731b JH |
1266 | } |
1267 | ||
1268 | module_init(afiucv_init); | |
1269 | module_exit(afiucv_exit); | |
1270 | ||
1271 | MODULE_AUTHOR("Jennifer Hunt <jenhunt@us.ibm.com>"); | |
1272 | MODULE_DESCRIPTION("IUCV Sockets ver " VERSION); | |
1273 | MODULE_VERSION(VERSION); | |
1274 | MODULE_LICENSE("GPL"); | |
1275 | MODULE_ALIAS_NETPROTO(PF_IUCV); |