blob: ee517108856e26f2466c54e7cc5475fc0d26b9f2 [file] [log] [blame]
Jennifer Hunteac37312007-02-08 13:51:54 -08001/*
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
Ursula Braun8f7c5022008-12-25 13:39:47 +010011#define KMSG_COMPONENT "af_iucv"
12#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
13
Jennifer Hunteac37312007-02-08 13:51:54 -080014#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
37static char iucv_userid[80];
38
39static struct proto_ops iucv_sock_ops;
40
41static struct proto iucv_proto = {
42 .name = "AF_IUCV",
43 .owner = THIS_MODULE,
44 .obj_size = sizeof(struct iucv_sock),
45};
46
Heiko Carstens57f20442007-10-08 02:02:52 -070047static void iucv_sock_kill(struct sock *sk);
48static void iucv_sock_close(struct sock *sk);
49
Jennifer Hunteac37312007-02-08 13:51:54 -080050/* Call Back functions */
51static void iucv_callback_rx(struct iucv_path *, struct iucv_message *);
52static void iucv_callback_txdone(struct iucv_path *, struct iucv_message *);
53static void iucv_callback_connack(struct iucv_path *, u8 ipuser[16]);
Heiko Carstensda99f052007-05-04 12:23:27 -070054static int iucv_callback_connreq(struct iucv_path *, u8 ipvmid[8],
55 u8 ipuser[16]);
Jennifer Hunteac37312007-02-08 13:51:54 -080056static void iucv_callback_connrej(struct iucv_path *, u8 ipuser[16]);
57
58static struct iucv_sock_list iucv_sk_list = {
Robert P. J. Day3db8ce32008-04-10 02:11:24 -070059 .lock = __RW_LOCK_UNLOCKED(iucv_sk_list.lock),
Jennifer Hunteac37312007-02-08 13:51:54 -080060 .autobind_name = ATOMIC_INIT(0)
61};
62
63static 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
71static inline void high_nmcpy(unsigned char *dst, char *src)
72{
73 memcpy(dst, src, 8);
74}
75
76static inline void low_nmcpy(unsigned char *dst, char *src)
77{
78 memcpy(&dst[8], src, 8);
79}
80
81/* Timers */
82static 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
95static void iucv_sock_clear_timer(struct sock *sk)
96{
97 sk_stop_timer(sk, &sk->sk_timer);
98}
99
Jennifer Hunteac37312007-02-08 13:51:54 -0800100static 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
112static 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 */
119static 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 */
134static 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 */
145static 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;
Jennifer Hunt561e0362007-05-04 12:22:07 -0700150 unsigned long timeo;
Jennifer Hunteac37312007-02-08 13:51:54 -0800151
152 iucv_sock_clear_timer(sk);
153 lock_sock(sk);
154
Heiko Carstensda99f052007-05-04 12:23:27 -0700155 switch (sk->sk_state) {
Jennifer Hunteac37312007-02-08 13:51:54 -0800156 case IUCV_LISTEN:
157 iucv_sock_cleanup_listen(sk);
158 break;
159
160 case IUCV_CONNECTED:
161 case IUCV_DISCONN:
162 err = 0;
Jennifer Hunt561e0362007-05-04 12:22:07 -0700163
164 sk->sk_state = IUCV_CLOSING;
165 sk->sk_state_change(sk);
166
Heiko Carstensda99f052007-05-04 12:23:27 -0700167 if (!skb_queue_empty(&iucv->send_skb_q)) {
Jennifer Hunt561e0362007-05-04 12:22:07 -0700168 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
Ursula Braunbbe188c2009-04-21 06:04:20 +0000175 case IUCV_CLOSING: /* fall through */
Jennifer Hunt561e0362007-05-04 12:22:07 -0700176 sk->sk_state = IUCV_CLOSED;
177 sk->sk_state_change(sk);
178
Jennifer Hunteac37312007-02-08 13:51:54 -0800179 if (iucv->path) {
180 low_nmcpy(user_data, iucv->src_name);
181 high_nmcpy(user_data, iucv->dst_name);
182 ASCEBC(user_data, sizeof(user_data));
183 err = iucv_path_sever(iucv->path, user_data);
184 iucv_path_free(iucv->path);
185 iucv->path = NULL;
186 }
187
Jennifer Hunteac37312007-02-08 13:51:54 -0800188 sk->sk_err = ECONNRESET;
189 sk->sk_state_change(sk);
190
191 skb_queue_purge(&iucv->send_skb_q);
Jennifer Hunt561e0362007-05-04 12:22:07 -0700192 skb_queue_purge(&iucv->backlog_skb_q);
Jennifer Hunteac37312007-02-08 13:51:54 -0800193
194 sock_set_flag(sk, SOCK_ZAPPED);
195 break;
196
197 default:
198 sock_set_flag(sk, SOCK_ZAPPED);
199 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700200 }
Jennifer Hunteac37312007-02-08 13:51:54 -0800201
202 release_sock(sk);
203 iucv_sock_kill(sk);
204}
205
206static void iucv_sock_init(struct sock *sk, struct sock *parent)
207{
208 if (parent)
209 sk->sk_type = parent->sk_type;
210}
211
212static struct sock *iucv_sock_alloc(struct socket *sock, int proto, gfp_t prio)
213{
214 struct sock *sk;
215
Pavel Emelyanov6257ff22007-11-01 00:39:31 -0700216 sk = sk_alloc(&init_net, PF_IUCV, prio, &iucv_proto);
Jennifer Hunteac37312007-02-08 13:51:54 -0800217 if (!sk)
218 return NULL;
219
220 sock_init_data(sock, sk);
221 INIT_LIST_HEAD(&iucv_sk(sk)->accept_q);
Ursula Braunfebca282007-07-14 19:04:25 -0700222 spin_lock_init(&iucv_sk(sk)->accept_q_lock);
Jennifer Hunteac37312007-02-08 13:51:54 -0800223 skb_queue_head_init(&iucv_sk(sk)->send_skb_q);
Ursula Braunf0703c82007-10-08 02:03:31 -0700224 INIT_LIST_HEAD(&iucv_sk(sk)->message_q.list);
225 spin_lock_init(&iucv_sk(sk)->message_q.lock);
Jennifer Hunt561e0362007-05-04 12:22:07 -0700226 skb_queue_head_init(&iucv_sk(sk)->backlog_skb_q);
Jennifer Hunteac37312007-02-08 13:51:54 -0800227 iucv_sk(sk)->send_tag = 0;
Ursula Braunbbe188c2009-04-21 06:04:20 +0000228 iucv_sk(sk)->path = NULL;
229 memset(&iucv_sk(sk)->src_user_id , 0, 32);
Jennifer Hunteac37312007-02-08 13:51:54 -0800230
231 sk->sk_destruct = iucv_sock_destruct;
232 sk->sk_sndtimeo = IUCV_CONN_TIMEOUT;
233 sk->sk_allocation = GFP_DMA;
234
235 sock_reset_flag(sk, SOCK_ZAPPED);
236
237 sk->sk_protocol = proto;
238 sk->sk_state = IUCV_OPEN;
239
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -0800240 setup_timer(&sk->sk_timer, iucv_sock_timeout, (unsigned long)sk);
Jennifer Hunteac37312007-02-08 13:51:54 -0800241
242 iucv_sock_link(&iucv_sk_list, sk);
243 return sk;
244}
245
246/* Create an IUCV socket */
Eric W. Biederman1b8d7ae2007-10-08 23:24:22 -0700247static int iucv_sock_create(struct net *net, struct socket *sock, int protocol)
Jennifer Hunteac37312007-02-08 13:51:54 -0800248{
249 struct sock *sk;
250
251 if (sock->type != SOCK_STREAM)
252 return -ESOCKTNOSUPPORT;
253
254 sock->state = SS_UNCONNECTED;
255 sock->ops = &iucv_sock_ops;
256
257 sk = iucv_sock_alloc(sock, protocol, GFP_KERNEL);
258 if (!sk)
259 return -ENOMEM;
260
261 iucv_sock_init(sk, NULL);
262
263 return 0;
264}
265
266void iucv_sock_link(struct iucv_sock_list *l, struct sock *sk)
267{
268 write_lock_bh(&l->lock);
269 sk_add_node(sk, &l->head);
270 write_unlock_bh(&l->lock);
271}
272
273void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *sk)
274{
275 write_lock_bh(&l->lock);
276 sk_del_node_init(sk);
277 write_unlock_bh(&l->lock);
278}
279
280void iucv_accept_enqueue(struct sock *parent, struct sock *sk)
281{
Ursula Braunfebca282007-07-14 19:04:25 -0700282 unsigned long flags;
283 struct iucv_sock *par = iucv_sk(parent);
284
Jennifer Hunteac37312007-02-08 13:51:54 -0800285 sock_hold(sk);
Ursula Braunfebca282007-07-14 19:04:25 -0700286 spin_lock_irqsave(&par->accept_q_lock, flags);
287 list_add_tail(&iucv_sk(sk)->accept_q, &par->accept_q);
288 spin_unlock_irqrestore(&par->accept_q_lock, flags);
Jennifer Hunteac37312007-02-08 13:51:54 -0800289 iucv_sk(sk)->parent = parent;
290 parent->sk_ack_backlog++;
291}
292
293void iucv_accept_unlink(struct sock *sk)
294{
Ursula Braunfebca282007-07-14 19:04:25 -0700295 unsigned long flags;
296 struct iucv_sock *par = iucv_sk(iucv_sk(sk)->parent);
297
298 spin_lock_irqsave(&par->accept_q_lock, flags);
Jennifer Hunteac37312007-02-08 13:51:54 -0800299 list_del_init(&iucv_sk(sk)->accept_q);
Ursula Braunfebca282007-07-14 19:04:25 -0700300 spin_unlock_irqrestore(&par->accept_q_lock, flags);
Jennifer Hunteac37312007-02-08 13:51:54 -0800301 iucv_sk(sk)->parent->sk_ack_backlog--;
302 iucv_sk(sk)->parent = NULL;
303 sock_put(sk);
304}
305
306struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock)
307{
308 struct iucv_sock *isk, *n;
309 struct sock *sk;
310
Heiko Carstensda99f052007-05-04 12:23:27 -0700311 list_for_each_entry_safe(isk, n, &iucv_sk(parent)->accept_q, accept_q) {
Jennifer Hunteac37312007-02-08 13:51:54 -0800312 sk = (struct sock *) isk;
313 lock_sock(sk);
314
315 if (sk->sk_state == IUCV_CLOSED) {
Jennifer Hunteac37312007-02-08 13:51:54 -0800316 iucv_accept_unlink(sk);
Ursula Braunfebca282007-07-14 19:04:25 -0700317 release_sock(sk);
Jennifer Hunteac37312007-02-08 13:51:54 -0800318 continue;
319 }
320
321 if (sk->sk_state == IUCV_CONNECTED ||
322 sk->sk_state == IUCV_SEVERED ||
323 !newsock) {
324 iucv_accept_unlink(sk);
325 if (newsock)
326 sock_graft(sk, newsock);
327
328 if (sk->sk_state == IUCV_SEVERED)
329 sk->sk_state = IUCV_DISCONN;
330
331 release_sock(sk);
332 return sk;
333 }
334
335 release_sock(sk);
336 }
337 return NULL;
338}
339
340int iucv_sock_wait_state(struct sock *sk, int state, int state2,
341 unsigned long timeo)
342{
343 DECLARE_WAITQUEUE(wait, current);
344 int err = 0;
345
346 add_wait_queue(sk->sk_sleep, &wait);
347 while (sk->sk_state != state && sk->sk_state != state2) {
348 set_current_state(TASK_INTERRUPTIBLE);
349
350 if (!timeo) {
351 err = -EAGAIN;
352 break;
353 }
354
355 if (signal_pending(current)) {
356 err = sock_intr_errno(timeo);
357 break;
358 }
359
360 release_sock(sk);
361 timeo = schedule_timeout(timeo);
362 lock_sock(sk);
363
364 err = sock_error(sk);
365 if (err)
366 break;
367 }
368 set_current_state(TASK_RUNNING);
369 remove_wait_queue(sk->sk_sleep, &wait);
370 return err;
371}
372
373/* Bind an unbound socket */
374static int iucv_sock_bind(struct socket *sock, struct sockaddr *addr,
375 int addr_len)
376{
377 struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr;
378 struct sock *sk = sock->sk;
379 struct iucv_sock *iucv;
380 int err;
381
382 /* Verify the input sockaddr */
383 if (!addr || addr->sa_family != AF_IUCV)
384 return -EINVAL;
385
386 lock_sock(sk);
387 if (sk->sk_state != IUCV_OPEN) {
388 err = -EBADFD;
389 goto done;
390 }
391
392 write_lock_bh(&iucv_sk_list.lock);
393
394 iucv = iucv_sk(sk);
395 if (__iucv_get_sock_by_name(sa->siucv_name)) {
396 err = -EADDRINUSE;
397 goto done_unlock;
398 }
399 if (iucv->path) {
400 err = 0;
401 goto done_unlock;
402 }
403
404 /* Bind the socket */
405 memcpy(iucv->src_name, sa->siucv_name, 8);
406
407 /* Copy the user id */
408 memcpy(iucv->src_user_id, iucv_userid, 8);
409 sk->sk_state = IUCV_BOUND;
410 err = 0;
411
412done_unlock:
413 /* Release the socket list lock */
414 write_unlock_bh(&iucv_sk_list.lock);
415done:
416 release_sock(sk);
417 return err;
418}
419
420/* Automatically bind an unbound socket */
421static int iucv_sock_autobind(struct sock *sk)
422{
423 struct iucv_sock *iucv = iucv_sk(sk);
424 char query_buffer[80];
425 char name[12];
426 int err = 0;
427
428 /* Set the userid and name */
429 cpcmd("QUERY USERID", query_buffer, sizeof(query_buffer), &err);
430 if (unlikely(err))
431 return -EPROTO;
432
433 memcpy(iucv->src_user_id, query_buffer, 8);
434
435 write_lock_bh(&iucv_sk_list.lock);
436
437 sprintf(name, "%08x", atomic_inc_return(&iucv_sk_list.autobind_name));
438 while (__iucv_get_sock_by_name(name)) {
439 sprintf(name, "%08x",
440 atomic_inc_return(&iucv_sk_list.autobind_name));
441 }
442
443 write_unlock_bh(&iucv_sk_list.lock);
444
445 memcpy(&iucv->src_name, name, 8);
446
447 return err;
448}
449
450/* Connect an unconnected socket */
451static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr,
452 int alen, int flags)
453{
454 struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr;
455 struct sock *sk = sock->sk;
456 struct iucv_sock *iucv;
457 unsigned char user_data[16];
458 int err;
459
460 if (addr->sa_family != AF_IUCV || alen < sizeof(struct sockaddr_iucv))
461 return -EINVAL;
462
463 if (sk->sk_state != IUCV_OPEN && sk->sk_state != IUCV_BOUND)
464 return -EBADFD;
465
466 if (sk->sk_type != SOCK_STREAM)
467 return -EINVAL;
468
469 iucv = iucv_sk(sk);
470
471 if (sk->sk_state == IUCV_OPEN) {
472 err = iucv_sock_autobind(sk);
473 if (unlikely(err))
474 return err;
475 }
476
477 lock_sock(sk);
478
479 /* Set the destination information */
480 memcpy(iucv_sk(sk)->dst_user_id, sa->siucv_user_id, 8);
481 memcpy(iucv_sk(sk)->dst_name, sa->siucv_name, 8);
482
483 high_nmcpy(user_data, sa->siucv_name);
484 low_nmcpy(user_data, iucv_sk(sk)->src_name);
485 ASCEBC(user_data, sizeof(user_data));
486
487 iucv = iucv_sk(sk);
488 /* Create path. */
489 iucv->path = iucv_path_alloc(IUCV_QUEUELEN_DEFAULT,
490 IPRMDATA, GFP_KERNEL);
Ursula Braund4444722008-02-07 18:07:19 -0800491 if (!iucv->path) {
492 err = -ENOMEM;
493 goto done;
494 }
Jennifer Hunteac37312007-02-08 13:51:54 -0800495 err = iucv_path_connect(iucv->path, &af_iucv_handler,
496 sa->siucv_user_id, NULL, user_data, sk);
497 if (err) {
498 iucv_path_free(iucv->path);
499 iucv->path = NULL;
Hendrik Brueckner55cdea92009-01-05 18:07:07 -0800500 switch (err) {
501 case 0x0b: /* Target communicator is not logged on */
502 err = -ENETUNREACH;
503 break;
504 case 0x0d: /* Max connections for this guest exceeded */
505 case 0x0e: /* Max connections for target guest exceeded */
506 err = -EAGAIN;
507 break;
508 case 0x0f: /* Missing IUCV authorization */
509 err = -EACCES;
510 break;
511 default:
512 err = -ECONNREFUSED;
513 break;
514 }
Jennifer Hunteac37312007-02-08 13:51:54 -0800515 goto done;
516 }
517
518 if (sk->sk_state != IUCV_CONNECTED) {
519 err = iucv_sock_wait_state(sk, IUCV_CONNECTED, IUCV_DISCONN,
520 sock_sndtimeo(sk, flags & O_NONBLOCK));
521 }
522
523 if (sk->sk_state == IUCV_DISCONN) {
524 release_sock(sk);
525 return -ECONNREFUSED;
526 }
Ursula Braun18becbc2009-01-05 18:07:46 -0800527
528 if (err) {
529 iucv_path_sever(iucv->path, NULL);
530 iucv_path_free(iucv->path);
531 iucv->path = NULL;
532 }
533
Jennifer Hunteac37312007-02-08 13:51:54 -0800534done:
535 release_sock(sk);
536 return err;
537}
538
539/* Move a socket into listening state. */
540static int iucv_sock_listen(struct socket *sock, int backlog)
541{
542 struct sock *sk = sock->sk;
543 int err;
544
545 lock_sock(sk);
546
547 err = -EINVAL;
548 if (sk->sk_state != IUCV_BOUND || sock->type != SOCK_STREAM)
549 goto done;
550
551 sk->sk_max_ack_backlog = backlog;
552 sk->sk_ack_backlog = 0;
553 sk->sk_state = IUCV_LISTEN;
554 err = 0;
555
556done:
557 release_sock(sk);
558 return err;
559}
560
561/* Accept a pending connection */
562static int iucv_sock_accept(struct socket *sock, struct socket *newsock,
563 int flags)
564{
565 DECLARE_WAITQUEUE(wait, current);
566 struct sock *sk = sock->sk, *nsk;
567 long timeo;
568 int err = 0;
569
Jennifer Hunt561e0362007-05-04 12:22:07 -0700570 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
Jennifer Hunteac37312007-02-08 13:51:54 -0800571
572 if (sk->sk_state != IUCV_LISTEN) {
573 err = -EBADFD;
574 goto done;
575 }
576
577 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
578
579 /* Wait for an incoming connection */
580 add_wait_queue_exclusive(sk->sk_sleep, &wait);
Heiko Carstensda99f052007-05-04 12:23:27 -0700581 while (!(nsk = iucv_accept_dequeue(sk, newsock))) {
Jennifer Hunteac37312007-02-08 13:51:54 -0800582 set_current_state(TASK_INTERRUPTIBLE);
583 if (!timeo) {
584 err = -EAGAIN;
585 break;
586 }
587
588 release_sock(sk);
589 timeo = schedule_timeout(timeo);
Jennifer Hunt561e0362007-05-04 12:22:07 -0700590 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
Jennifer Hunteac37312007-02-08 13:51:54 -0800591
592 if (sk->sk_state != IUCV_LISTEN) {
593 err = -EBADFD;
594 break;
595 }
596
597 if (signal_pending(current)) {
598 err = sock_intr_errno(timeo);
599 break;
600 }
601 }
602
603 set_current_state(TASK_RUNNING);
604 remove_wait_queue(sk->sk_sleep, &wait);
605
606 if (err)
607 goto done;
608
609 newsock->state = SS_CONNECTED;
610
611done:
612 release_sock(sk);
613 return err;
614}
615
616static int iucv_sock_getname(struct socket *sock, struct sockaddr *addr,
617 int *len, int peer)
618{
619 struct sockaddr_iucv *siucv = (struct sockaddr_iucv *) addr;
620 struct sock *sk = sock->sk;
621
622 addr->sa_family = AF_IUCV;
623 *len = sizeof(struct sockaddr_iucv);
624
625 if (peer) {
626 memcpy(siucv->siucv_user_id, iucv_sk(sk)->dst_user_id, 8);
627 memcpy(siucv->siucv_name, &iucv_sk(sk)->dst_name, 8);
628 } else {
629 memcpy(siucv->siucv_user_id, iucv_sk(sk)->src_user_id, 8);
630 memcpy(siucv->siucv_name, iucv_sk(sk)->src_name, 8);
631 }
632 memset(&siucv->siucv_port, 0, sizeof(siucv->siucv_port));
633 memset(&siucv->siucv_addr, 0, sizeof(siucv->siucv_addr));
634 memset(siucv->siucv_nodeid, 0, sizeof(siucv->siucv_nodeid));
635
636 return 0;
637}
638
639static int iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
640 struct msghdr *msg, size_t len)
641{
642 struct sock *sk = sock->sk;
643 struct iucv_sock *iucv = iucv_sk(sk);
644 struct sk_buff *skb;
645 struct iucv_message txmsg;
Ursula Braun8f7c5022008-12-25 13:39:47 +0100646 char user_id[9];
647 char appl_id[9];
Jennifer Hunteac37312007-02-08 13:51:54 -0800648 int err;
649
650 err = sock_error(sk);
651 if (err)
652 return err;
653
654 if (msg->msg_flags & MSG_OOB)
655 return -EOPNOTSUPP;
656
657 lock_sock(sk);
658
659 if (sk->sk_shutdown & SEND_SHUTDOWN) {
660 err = -EPIPE;
661 goto out;
662 }
663
Heiko Carstensda99f052007-05-04 12:23:27 -0700664 if (sk->sk_state == IUCV_CONNECTED) {
665 if (!(skb = sock_alloc_send_skb(sk, len,
666 msg->msg_flags & MSG_DONTWAIT,
667 &err)))
Jennifer Hunt561e0362007-05-04 12:22:07 -0700668 goto out;
Jennifer Hunteac37312007-02-08 13:51:54 -0800669
Heiko Carstensda99f052007-05-04 12:23:27 -0700670 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
Jennifer Hunteac37312007-02-08 13:51:54 -0800671 err = -EFAULT;
672 goto fail;
673 }
674
675 txmsg.class = 0;
Ursula Braun469689a4d2008-06-09 15:51:03 -0700676 memcpy(&txmsg.class, skb->data, skb->len >= 4 ? 4 : skb->len);
Jennifer Hunteac37312007-02-08 13:51:54 -0800677 txmsg.tag = iucv->send_tag++;
678 memcpy(skb->cb, &txmsg.tag, 4);
679 skb_queue_tail(&iucv->send_skb_q, skb);
680 err = iucv_message_send(iucv->path, &txmsg, 0, 0,
681 (void *) skb->data, skb->len);
682 if (err) {
Ursula Braun8f7c5022008-12-25 13:39:47 +0100683 if (err == 3) {
684 user_id[8] = 0;
685 memcpy(user_id, iucv->dst_user_id, 8);
686 appl_id[8] = 0;
687 memcpy(appl_id, iucv->dst_name, 8);
688 pr_err("Application %s on z/VM guest %s"
689 " exceeds message limit\n",
690 user_id, appl_id);
691 }
Jennifer Hunteac37312007-02-08 13:51:54 -0800692 skb_unlink(skb, &iucv->send_skb_q);
693 err = -EPIPE;
694 goto fail;
695 }
696
697 } else {
698 err = -ENOTCONN;
699 goto out;
700 }
701
702 release_sock(sk);
703 return len;
704
705fail:
706 kfree_skb(skb);
707out:
708 release_sock(sk);
709 return err;
710}
711
Ursula Braunf0703c82007-10-08 02:03:31 -0700712static int iucv_fragment_skb(struct sock *sk, struct sk_buff *skb, int len)
713{
714 int dataleft, size, copied = 0;
715 struct sk_buff *nskb;
716
717 dataleft = len;
718 while (dataleft) {
719 if (dataleft >= sk->sk_rcvbuf / 4)
720 size = sk->sk_rcvbuf / 4;
721 else
722 size = dataleft;
723
724 nskb = alloc_skb(size, GFP_ATOMIC | GFP_DMA);
725 if (!nskb)
726 return -ENOMEM;
727
728 memcpy(nskb->data, skb->data + copied, size);
729 copied += size;
730 dataleft -= size;
731
732 skb_reset_transport_header(nskb);
733 skb_reset_network_header(nskb);
734 nskb->len = size;
735
736 skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, nskb);
737 }
738
739 return 0;
740}
741
742static void iucv_process_message(struct sock *sk, struct sk_buff *skb,
743 struct iucv_path *path,
744 struct iucv_message *msg)
745{
746 int rc;
747
748 if (msg->flags & IPRMDATA) {
749 skb->data = NULL;
750 skb->len = 0;
751 } else {
752 rc = iucv_message_receive(path, msg, 0, skb->data,
753 msg->length, NULL);
754 if (rc) {
755 kfree_skb(skb);
756 return;
757 }
758 if (skb->truesize >= sk->sk_rcvbuf / 4) {
759 rc = iucv_fragment_skb(sk, skb, msg->length);
760 kfree_skb(skb);
761 skb = NULL;
762 if (rc) {
763 iucv_path_sever(path, NULL);
764 return;
765 }
766 skb = skb_dequeue(&iucv_sk(sk)->backlog_skb_q);
767 } else {
768 skb_reset_transport_header(skb);
769 skb_reset_network_header(skb);
770 skb->len = msg->length;
771 }
772 }
773
774 if (sock_queue_rcv_skb(sk, skb))
775 skb_queue_head(&iucv_sk(sk)->backlog_skb_q, skb);
776}
777
778static void iucv_process_message_q(struct sock *sk)
779{
780 struct iucv_sock *iucv = iucv_sk(sk);
781 struct sk_buff *skb;
782 struct sock_msg_q *p, *n;
783
784 list_for_each_entry_safe(p, n, &iucv->message_q.list, list) {
785 skb = alloc_skb(p->msg.length, GFP_ATOMIC | GFP_DMA);
786 if (!skb)
787 break;
788 iucv_process_message(sk, skb, p->path, &p->msg);
789 list_del(&p->list);
790 kfree(p);
791 if (!skb_queue_empty(&iucv->backlog_skb_q))
792 break;
793 }
794}
795
Jennifer Hunteac37312007-02-08 13:51:54 -0800796static int iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
797 struct msghdr *msg, size_t len, int flags)
798{
799 int noblock = flags & MSG_DONTWAIT;
800 struct sock *sk = sock->sk;
Jennifer Hunt561e0362007-05-04 12:22:07 -0700801 struct iucv_sock *iucv = iucv_sk(sk);
Jennifer Hunteac37312007-02-08 13:51:54 -0800802 int target, copied = 0;
Jennifer Hunt561e0362007-05-04 12:22:07 -0700803 struct sk_buff *skb, *rskb, *cskb;
Jennifer Hunteac37312007-02-08 13:51:54 -0800804 int err = 0;
805
Jennifer Hunt561e0362007-05-04 12:22:07 -0700806 if ((sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_SEVERED) &&
Ursula Braunf0703c82007-10-08 02:03:31 -0700807 skb_queue_empty(&iucv->backlog_skb_q) &&
808 skb_queue_empty(&sk->sk_receive_queue) &&
809 list_empty(&iucv->message_q.list))
Jennifer Hunt561e0362007-05-04 12:22:07 -0700810 return 0;
811
Jennifer Hunteac37312007-02-08 13:51:54 -0800812 if (flags & (MSG_OOB))
813 return -EOPNOTSUPP;
814
815 target = sock_rcvlowat(sk, flags & MSG_WAITALL, len);
816
Hendrik Brueckner60d37052009-04-21 06:04:21 +0000817 /* receive/dequeue next skb:
818 * the function understands MSG_PEEK and, thus, does not dequeue skb */
Jennifer Hunteac37312007-02-08 13:51:54 -0800819 skb = skb_recv_datagram(sk, flags, noblock, &err);
820 if (!skb) {
821 if (sk->sk_shutdown & RCV_SHUTDOWN)
822 return 0;
823 return err;
824 }
825
826 copied = min_t(unsigned int, skb->len, len);
827
Jennifer Hunt561e0362007-05-04 12:22:07 -0700828 cskb = skb;
829 if (memcpy_toiovec(msg->msg_iov, cskb->data, copied)) {
Jennifer Hunteac37312007-02-08 13:51:54 -0800830 skb_queue_head(&sk->sk_receive_queue, skb);
831 if (copied == 0)
832 return -EFAULT;
Jennifer Hunt561e0362007-05-04 12:22:07 -0700833 goto done;
Jennifer Hunteac37312007-02-08 13:51:54 -0800834 }
835
836 len -= copied;
837
838 /* Mark read part of skb as used */
839 if (!(flags & MSG_PEEK)) {
840 skb_pull(skb, copied);
841
842 if (skb->len) {
843 skb_queue_head(&sk->sk_receive_queue, skb);
844 goto done;
845 }
846
847 kfree_skb(skb);
Jennifer Hunt561e0362007-05-04 12:22:07 -0700848
849 /* Queue backlog skbs */
Ursula Braunf0703c82007-10-08 02:03:31 -0700850 rskb = skb_dequeue(&iucv->backlog_skb_q);
Heiko Carstensda99f052007-05-04 12:23:27 -0700851 while (rskb) {
Jennifer Hunt561e0362007-05-04 12:22:07 -0700852 if (sock_queue_rcv_skb(sk, rskb)) {
Ursula Braunf0703c82007-10-08 02:03:31 -0700853 skb_queue_head(&iucv->backlog_skb_q,
Jennifer Hunt561e0362007-05-04 12:22:07 -0700854 rskb);
855 break;
856 } else {
Ursula Braunf0703c82007-10-08 02:03:31 -0700857 rskb = skb_dequeue(&iucv->backlog_skb_q);
Jennifer Hunt561e0362007-05-04 12:22:07 -0700858 }
859 }
Ursula Braunf0703c82007-10-08 02:03:31 -0700860 if (skb_queue_empty(&iucv->backlog_skb_q)) {
861 spin_lock_bh(&iucv->message_q.lock);
862 if (!list_empty(&iucv->message_q.list))
863 iucv_process_message_q(sk);
864 spin_unlock_bh(&iucv->message_q.lock);
865 }
Hendrik Brueckner60d37052009-04-21 06:04:21 +0000866 }
Jennifer Hunteac37312007-02-08 13:51:54 -0800867
868done:
869 return err ? : copied;
870}
871
872static inline unsigned int iucv_accept_poll(struct sock *parent)
873{
874 struct iucv_sock *isk, *n;
875 struct sock *sk;
876
Heiko Carstensda99f052007-05-04 12:23:27 -0700877 list_for_each_entry_safe(isk, n, &iucv_sk(parent)->accept_q, accept_q) {
Jennifer Hunteac37312007-02-08 13:51:54 -0800878 sk = (struct sock *) isk;
879
880 if (sk->sk_state == IUCV_CONNECTED)
881 return POLLIN | POLLRDNORM;
882 }
883
884 return 0;
885}
886
887unsigned int iucv_sock_poll(struct file *file, struct socket *sock,
888 poll_table *wait)
889{
890 struct sock *sk = sock->sk;
891 unsigned int mask = 0;
892
893 poll_wait(file, sk->sk_sleep, wait);
894
895 if (sk->sk_state == IUCV_LISTEN)
896 return iucv_accept_poll(sk);
897
898 if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
899 mask |= POLLERR;
900
901 if (sk->sk_shutdown & RCV_SHUTDOWN)
902 mask |= POLLRDHUP;
903
904 if (sk->sk_shutdown == SHUTDOWN_MASK)
905 mask |= POLLHUP;
906
907 if (!skb_queue_empty(&sk->sk_receive_queue) ||
Heiko Carstensda99f052007-05-04 12:23:27 -0700908 (sk->sk_shutdown & RCV_SHUTDOWN))
Jennifer Hunteac37312007-02-08 13:51:54 -0800909 mask |= POLLIN | POLLRDNORM;
910
911 if (sk->sk_state == IUCV_CLOSED)
912 mask |= POLLHUP;
913
Jennifer Hunt561e0362007-05-04 12:22:07 -0700914 if (sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_SEVERED)
915 mask |= POLLIN;
916
Jennifer Hunteac37312007-02-08 13:51:54 -0800917 if (sock_writeable(sk))
918 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
919 else
920 set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
921
922 return mask;
923}
924
925static int iucv_sock_shutdown(struct socket *sock, int how)
926{
927 struct sock *sk = sock->sk;
928 struct iucv_sock *iucv = iucv_sk(sk);
929 struct iucv_message txmsg;
930 int err = 0;
931 u8 prmmsg[8] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01};
932
933 how++;
934
935 if ((how & ~SHUTDOWN_MASK) || !how)
936 return -EINVAL;
937
938 lock_sock(sk);
Heiko Carstensda99f052007-05-04 12:23:27 -0700939 switch (sk->sk_state) {
Jennifer Hunteac37312007-02-08 13:51:54 -0800940 case IUCV_CLOSED:
941 err = -ENOTCONN;
942 goto fail;
943
944 default:
945 sk->sk_shutdown |= how;
946 break;
947 }
948
949 if (how == SEND_SHUTDOWN || how == SHUTDOWN_MASK) {
950 txmsg.class = 0;
951 txmsg.tag = 0;
952 err = iucv_message_send(iucv->path, &txmsg, IUCV_IPRMDATA, 0,
953 (void *) prmmsg, 8);
954 if (err) {
Heiko Carstensda99f052007-05-04 12:23:27 -0700955 switch (err) {
Jennifer Hunteac37312007-02-08 13:51:54 -0800956 case 1:
957 err = -ENOTCONN;
958 break;
959 case 2:
960 err = -ECONNRESET;
961 break;
962 default:
963 err = -ENOTCONN;
964 break;
965 }
966 }
967 }
968
969 if (how == RCV_SHUTDOWN || how == SHUTDOWN_MASK) {
970 err = iucv_path_quiesce(iucv_sk(sk)->path, NULL);
971 if (err)
972 err = -ENOTCONN;
973
974 skb_queue_purge(&sk->sk_receive_queue);
975 }
976
977 /* Wake up anyone sleeping in poll */
978 sk->sk_state_change(sk);
979
980fail:
981 release_sock(sk);
982 return err;
983}
984
985static int iucv_sock_release(struct socket *sock)
986{
987 struct sock *sk = sock->sk;
988 int err = 0;
989
990 if (!sk)
991 return 0;
992
993 iucv_sock_close(sk);
994
995 /* Unregister with IUCV base support */
996 if (iucv_sk(sk)->path) {
997 iucv_path_sever(iucv_sk(sk)->path, NULL);
998 iucv_path_free(iucv_sk(sk)->path);
999 iucv_sk(sk)->path = NULL;
1000 }
1001
Jennifer Hunteac37312007-02-08 13:51:54 -08001002 sock_orphan(sk);
1003 iucv_sock_kill(sk);
1004 return err;
1005}
1006
1007/* Callback wrappers - called from iucv base support */
1008static int iucv_callback_connreq(struct iucv_path *path,
1009 u8 ipvmid[8], u8 ipuser[16])
1010{
1011 unsigned char user_data[16];
1012 unsigned char nuser_data[16];
1013 unsigned char src_name[8];
1014 struct hlist_node *node;
1015 struct sock *sk, *nsk;
1016 struct iucv_sock *iucv, *niucv;
1017 int err;
1018
1019 memcpy(src_name, ipuser, 8);
1020 EBCASC(src_name, 8);
1021 /* Find out if this path belongs to af_iucv. */
1022 read_lock(&iucv_sk_list.lock);
1023 iucv = NULL;
Ursula Braunfebca282007-07-14 19:04:25 -07001024 sk = NULL;
Jennifer Hunteac37312007-02-08 13:51:54 -08001025 sk_for_each(sk, node, &iucv_sk_list.head)
1026 if (sk->sk_state == IUCV_LISTEN &&
1027 !memcmp(&iucv_sk(sk)->src_name, src_name, 8)) {
1028 /*
1029 * Found a listening socket with
1030 * src_name == ipuser[0-7].
1031 */
1032 iucv = iucv_sk(sk);
1033 break;
1034 }
1035 read_unlock(&iucv_sk_list.lock);
1036 if (!iucv)
1037 /* No socket found, not one of our paths. */
1038 return -EINVAL;
1039
1040 bh_lock_sock(sk);
1041
1042 /* Check if parent socket is listening */
1043 low_nmcpy(user_data, iucv->src_name);
1044 high_nmcpy(user_data, iucv->dst_name);
1045 ASCEBC(user_data, sizeof(user_data));
1046 if (sk->sk_state != IUCV_LISTEN) {
1047 err = iucv_path_sever(path, user_data);
Hendrik Brueckner65dbd7c2009-01-05 18:08:23 -08001048 iucv_path_free(path);
Jennifer Hunteac37312007-02-08 13:51:54 -08001049 goto fail;
1050 }
1051
1052 /* Check for backlog size */
1053 if (sk_acceptq_is_full(sk)) {
1054 err = iucv_path_sever(path, user_data);
Hendrik Brueckner65dbd7c2009-01-05 18:08:23 -08001055 iucv_path_free(path);
Jennifer Hunteac37312007-02-08 13:51:54 -08001056 goto fail;
1057 }
1058
1059 /* Create the new socket */
1060 nsk = iucv_sock_alloc(NULL, SOCK_STREAM, GFP_ATOMIC);
Heiko Carstensda99f052007-05-04 12:23:27 -07001061 if (!nsk) {
Jennifer Hunteac37312007-02-08 13:51:54 -08001062 err = iucv_path_sever(path, user_data);
Hendrik Brueckner65dbd7c2009-01-05 18:08:23 -08001063 iucv_path_free(path);
Jennifer Hunteac37312007-02-08 13:51:54 -08001064 goto fail;
1065 }
1066
1067 niucv = iucv_sk(nsk);
1068 iucv_sock_init(nsk, sk);
1069
1070 /* Set the new iucv_sock */
1071 memcpy(niucv->dst_name, ipuser + 8, 8);
1072 EBCASC(niucv->dst_name, 8);
1073 memcpy(niucv->dst_user_id, ipvmid, 8);
1074 memcpy(niucv->src_name, iucv->src_name, 8);
1075 memcpy(niucv->src_user_id, iucv->src_user_id, 8);
1076 niucv->path = path;
1077
1078 /* Call iucv_accept */
1079 high_nmcpy(nuser_data, ipuser + 8);
1080 memcpy(nuser_data + 8, niucv->src_name, 8);
1081 ASCEBC(nuser_data + 8, 8);
1082
1083 path->msglim = IUCV_QUEUELEN_DEFAULT;
1084 err = iucv_path_accept(path, &af_iucv_handler, nuser_data, nsk);
Heiko Carstensda99f052007-05-04 12:23:27 -07001085 if (err) {
Jennifer Hunteac37312007-02-08 13:51:54 -08001086 err = iucv_path_sever(path, user_data);
Hendrik Brueckner65dbd7c2009-01-05 18:08:23 -08001087 iucv_path_free(path);
1088 iucv_sock_kill(nsk);
Jennifer Hunteac37312007-02-08 13:51:54 -08001089 goto fail;
1090 }
1091
1092 iucv_accept_enqueue(sk, nsk);
1093
1094 /* Wake up accept */
1095 nsk->sk_state = IUCV_CONNECTED;
1096 sk->sk_data_ready(sk, 1);
1097 err = 0;
1098fail:
1099 bh_unlock_sock(sk);
1100 return 0;
1101}
1102
1103static void iucv_callback_connack(struct iucv_path *path, u8 ipuser[16])
1104{
1105 struct sock *sk = path->private;
1106
1107 sk->sk_state = IUCV_CONNECTED;
1108 sk->sk_state_change(sk);
1109}
1110
1111static void iucv_callback_rx(struct iucv_path *path, struct iucv_message *msg)
1112{
1113 struct sock *sk = path->private;
Jennifer Hunt561e0362007-05-04 12:22:07 -07001114 struct iucv_sock *iucv = iucv_sk(sk);
Ursula Braunf0703c82007-10-08 02:03:31 -07001115 struct sk_buff *skb;
1116 struct sock_msg_q *save_msg;
1117 int len;
Jennifer Hunt561e0362007-05-04 12:22:07 -07001118
Hendrik Bruecknerfe86e542009-04-21 06:04:22 +00001119 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1120 iucv_message_reject(path, msg);
Jennifer Hunteac37312007-02-08 13:51:54 -08001121 return;
Hendrik Bruecknerfe86e542009-04-21 06:04:22 +00001122 }
Jennifer Hunteac37312007-02-08 13:51:54 -08001123
Ursula Braunf0703c82007-10-08 02:03:31 -07001124 if (!list_empty(&iucv->message_q.list) ||
1125 !skb_queue_empty(&iucv->backlog_skb_q))
1126 goto save_message;
1127
1128 len = atomic_read(&sk->sk_rmem_alloc);
1129 len += msg->length + sizeof(struct sk_buff);
1130 if (len > sk->sk_rcvbuf)
1131 goto save_message;
1132
Jennifer Hunteac37312007-02-08 13:51:54 -08001133 skb = alloc_skb(msg->length, GFP_ATOMIC | GFP_DMA);
Ursula Braunf0703c82007-10-08 02:03:31 -07001134 if (!skb)
1135 goto save_message;
Jennifer Hunteac37312007-02-08 13:51:54 -08001136
Ursula Braunf0703c82007-10-08 02:03:31 -07001137 spin_lock(&iucv->message_q.lock);
1138 iucv_process_message(sk, skb, path, msg);
1139 spin_unlock(&iucv->message_q.lock);
Jennifer Hunteac37312007-02-08 13:51:54 -08001140
Ursula Braunf0703c82007-10-08 02:03:31 -07001141 return;
Jennifer Hunt561e0362007-05-04 12:22:07 -07001142
Ursula Braunf0703c82007-10-08 02:03:31 -07001143save_message:
1144 save_msg = kzalloc(sizeof(struct sock_msg_q), GFP_ATOMIC | GFP_DMA);
Ursula Braund4444722008-02-07 18:07:19 -08001145 if (!save_msg)
1146 return;
Ursula Braunf0703c82007-10-08 02:03:31 -07001147 save_msg->path = path;
1148 save_msg->msg = *msg;
1149
1150 spin_lock(&iucv->message_q.lock);
1151 list_add_tail(&save_msg->list, &iucv->message_q.list);
1152 spin_unlock(&iucv->message_q.lock);
Jennifer Hunteac37312007-02-08 13:51:54 -08001153}
1154
1155static void iucv_callback_txdone(struct iucv_path *path,
1156 struct iucv_message *msg)
1157{
1158 struct sock *sk = path->private;
Ursula Braunf2a77992008-02-07 18:07:44 -08001159 struct sk_buff *this = NULL;
Jennifer Hunteac37312007-02-08 13:51:54 -08001160 struct sk_buff_head *list = &iucv_sk(sk)->send_skb_q;
1161 struct sk_buff *list_skb = list->next;
1162 unsigned long flags;
1163
Ursula Braunf2a77992008-02-07 18:07:44 -08001164 if (!skb_queue_empty(list)) {
Jennifer Hunt561e0362007-05-04 12:22:07 -07001165 spin_lock_irqsave(&list->lock, flags);
Jennifer Hunteac37312007-02-08 13:51:54 -08001166
Ursula Braunf2a77992008-02-07 18:07:44 -08001167 while (list_skb != (struct sk_buff *)list) {
1168 if (!memcmp(&msg->tag, list_skb->cb, 4)) {
1169 this = list_skb;
1170 break;
1171 }
Jennifer Hunt561e0362007-05-04 12:22:07 -07001172 list_skb = list_skb->next;
Ursula Braunf2a77992008-02-07 18:07:44 -08001173 }
1174 if (this)
1175 __skb_unlink(this, list);
Jennifer Hunteac37312007-02-08 13:51:54 -08001176
Jennifer Hunt561e0362007-05-04 12:22:07 -07001177 spin_unlock_irqrestore(&list->lock, flags);
Jennifer Hunteac37312007-02-08 13:51:54 -08001178
Wei Yongjun47a30b22009-02-25 00:41:03 +00001179 kfree_skb(this);
Jennifer Hunt561e0362007-05-04 12:22:07 -07001180 }
Ursula Braunc2b4afd2008-07-14 09:59:29 +02001181 BUG_ON(!this);
Jennifer Hunt561e0362007-05-04 12:22:07 -07001182
Heiko Carstensda99f052007-05-04 12:23:27 -07001183 if (sk->sk_state == IUCV_CLOSING) {
Jennifer Hunt561e0362007-05-04 12:22:07 -07001184 if (skb_queue_empty(&iucv_sk(sk)->send_skb_q)) {
1185 sk->sk_state = IUCV_CLOSED;
1186 sk->sk_state_change(sk);
1187 }
1188 }
1189
Jennifer Hunteac37312007-02-08 13:51:54 -08001190}
1191
1192static void iucv_callback_connrej(struct iucv_path *path, u8 ipuser[16])
1193{
1194 struct sock *sk = path->private;
1195
1196 if (!list_empty(&iucv_sk(sk)->accept_q))
1197 sk->sk_state = IUCV_SEVERED;
1198 else
1199 sk->sk_state = IUCV_DISCONN;
1200
1201 sk->sk_state_change(sk);
1202}
1203
1204static struct proto_ops iucv_sock_ops = {
1205 .family = PF_IUCV,
1206 .owner = THIS_MODULE,
1207 .release = iucv_sock_release,
1208 .bind = iucv_sock_bind,
1209 .connect = iucv_sock_connect,
1210 .listen = iucv_sock_listen,
1211 .accept = iucv_sock_accept,
1212 .getname = iucv_sock_getname,
1213 .sendmsg = iucv_sock_sendmsg,
1214 .recvmsg = iucv_sock_recvmsg,
1215 .poll = iucv_sock_poll,
1216 .ioctl = sock_no_ioctl,
1217 .mmap = sock_no_mmap,
1218 .socketpair = sock_no_socketpair,
1219 .shutdown = iucv_sock_shutdown,
1220 .setsockopt = sock_no_setsockopt,
1221 .getsockopt = sock_no_getsockopt
1222};
1223
1224static struct net_proto_family iucv_sock_family_ops = {
1225 .family = AF_IUCV,
1226 .owner = THIS_MODULE,
1227 .create = iucv_sock_create,
1228};
1229
Heiko Carstensda99f052007-05-04 12:23:27 -07001230static int __init afiucv_init(void)
Jennifer Hunteac37312007-02-08 13:51:54 -08001231{
1232 int err;
1233
1234 if (!MACHINE_IS_VM) {
Ursula Braun8f7c5022008-12-25 13:39:47 +01001235 pr_err("The af_iucv module cannot be loaded"
1236 " without z/VM\n");
Jennifer Hunteac37312007-02-08 13:51:54 -08001237 err = -EPROTONOSUPPORT;
1238 goto out;
1239 }
1240 cpcmd("QUERY USERID", iucv_userid, sizeof(iucv_userid), &err);
1241 if (unlikely(err)) {
Ursula Braunc2b4afd2008-07-14 09:59:29 +02001242 WARN_ON(err);
Jennifer Hunteac37312007-02-08 13:51:54 -08001243 err = -EPROTONOSUPPORT;
1244 goto out;
1245 }
1246
1247 err = iucv_register(&af_iucv_handler, 0);
1248 if (err)
1249 goto out;
1250 err = proto_register(&iucv_proto, 0);
1251 if (err)
1252 goto out_iucv;
1253 err = sock_register(&iucv_sock_family_ops);
1254 if (err)
1255 goto out_proto;
Jennifer Hunteac37312007-02-08 13:51:54 -08001256 return 0;
1257
1258out_proto:
1259 proto_unregister(&iucv_proto);
1260out_iucv:
1261 iucv_unregister(&af_iucv_handler, 0);
1262out:
1263 return err;
1264}
1265
1266static void __exit afiucv_exit(void)
1267{
1268 sock_unregister(PF_IUCV);
1269 proto_unregister(&iucv_proto);
1270 iucv_unregister(&af_iucv_handler, 0);
Jennifer Hunteac37312007-02-08 13:51:54 -08001271}
1272
1273module_init(afiucv_init);
1274module_exit(afiucv_exit);
1275
1276MODULE_AUTHOR("Jennifer Hunt <jenhunt@us.ibm.com>");
1277MODULE_DESCRIPTION("IUCV Sockets ver " VERSION);
1278MODULE_VERSION(VERSION);
1279MODULE_LICENSE("GPL");
1280MODULE_ALIAS_NETPROTO(PF_IUCV);