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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
eac3731b | 2 | /* |
eac3731b JH |
3 | * IUCV protocol stack for Linux on zSeries |
4 | * | |
c23cad92 | 5 | * Copyright IBM Corp. 2006, 2009 |
eac3731b JH |
6 | * |
7 | * Author(s): Jennifer Hunt <jenhunt@us.ibm.com> | |
c23cad92 UB |
8 | * Hendrik Brueckner <brueckner@linux.vnet.ibm.com> |
9 | * PM functions: | |
10 | * Ursula Braun <ursula.braun@de.ibm.com> | |
eac3731b JH |
11 | */ |
12 | ||
8f7c502c UB |
13 | #define KMSG_COMPONENT "af_iucv" |
14 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
15 | ||
eac3731b JH |
16 | #include <linux/module.h> |
17 | #include <linux/types.h> | |
18 | #include <linux/list.h> | |
19 | #include <linux/errno.h> | |
20 | #include <linux/kernel.h> | |
174cd4b1 | 21 | #include <linux/sched/signal.h> |
eac3731b JH |
22 | #include <linux/slab.h> |
23 | #include <linux/skbuff.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/poll.h> | |
02f06918 | 26 | #include <linux/security.h> |
eac3731b JH |
27 | #include <net/sock.h> |
28 | #include <asm/ebcdic.h> | |
29 | #include <asm/cpcmd.h> | |
30 | #include <linux/kmod.h> | |
31 | ||
eac3731b JH |
32 | #include <net/iucv/af_iucv.h> |
33 | ||
3881ac44 | 34 | #define VERSION "1.2" |
eac3731b JH |
35 | |
36 | static char iucv_userid[80]; | |
37 | ||
5708e868 | 38 | static const struct proto_ops iucv_sock_ops; |
eac3731b JH |
39 | |
40 | static struct proto iucv_proto = { | |
41 | .name = "AF_IUCV", | |
42 | .owner = THIS_MODULE, | |
43 | .obj_size = sizeof(struct iucv_sock), | |
44 | }; | |
45 | ||
6fcd61f7 FB |
46 | static struct iucv_interface *pr_iucv; |
47 | ||
b8942e3b HB |
48 | /* special AF_IUCV IPRM messages */ |
49 | static const u8 iprm_shutdown[8] = | |
50 | {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}; | |
51 | ||
86c85e1f | 52 | #define TRGCLS_SIZE FIELD_SIZEOF(struct iucv_message, class) |
44b1e6b5 | 53 | |
0ea920d2 HB |
54 | #define __iucv_sock_wait(sk, condition, timeo, ret) \ |
55 | do { \ | |
56 | DEFINE_WAIT(__wait); \ | |
57 | long __timeo = timeo; \ | |
58 | ret = 0; \ | |
aa395145 | 59 | prepare_to_wait(sk_sleep(sk), &__wait, TASK_INTERRUPTIBLE); \ |
0ea920d2 | 60 | while (!(condition)) { \ |
0ea920d2 HB |
61 | if (!__timeo) { \ |
62 | ret = -EAGAIN; \ | |
63 | break; \ | |
64 | } \ | |
65 | if (signal_pending(current)) { \ | |
66 | ret = sock_intr_errno(__timeo); \ | |
67 | break; \ | |
68 | } \ | |
69 | release_sock(sk); \ | |
70 | __timeo = schedule_timeout(__timeo); \ | |
71 | lock_sock(sk); \ | |
72 | ret = sock_error(sk); \ | |
73 | if (ret) \ | |
74 | break; \ | |
75 | } \ | |
aa395145 | 76 | finish_wait(sk_sleep(sk), &__wait); \ |
0ea920d2 HB |
77 | } while (0) |
78 | ||
79 | #define iucv_sock_wait(sk, condition, timeo) \ | |
80 | ({ \ | |
81 | int __ret = 0; \ | |
82 | if (!(condition)) \ | |
83 | __iucv_sock_wait(sk, condition, timeo, __ret); \ | |
84 | __ret; \ | |
85 | }) | |
44b1e6b5 | 86 | |
57f20448 HC |
87 | static void iucv_sock_kill(struct sock *sk); |
88 | static void iucv_sock_close(struct sock *sk); | |
7d316b94 | 89 | static void iucv_sever_path(struct sock *, int); |
57f20448 | 90 | |
3881ac44 UB |
91 | static int afiucv_hs_rcv(struct sk_buff *skb, struct net_device *dev, |
92 | struct packet_type *pt, struct net_device *orig_dev); | |
93 | static int afiucv_hs_send(struct iucv_message *imsg, struct sock *sock, | |
94 | struct sk_buff *skb, u8 flags); | |
95 | static void afiucv_hs_callback_txnotify(struct sk_buff *, enum iucv_tx_notify); | |
96 | ||
eac3731b JH |
97 | /* Call Back functions */ |
98 | static void iucv_callback_rx(struct iucv_path *, struct iucv_message *); | |
99 | static void iucv_callback_txdone(struct iucv_path *, struct iucv_message *); | |
91e60eb6 UB |
100 | static void iucv_callback_connack(struct iucv_path *, u8 *); |
101 | static int iucv_callback_connreq(struct iucv_path *, u8 *, u8 *); | |
102 | static void iucv_callback_connrej(struct iucv_path *, u8 *); | |
103 | static void iucv_callback_shutdown(struct iucv_path *, u8 *); | |
eac3731b JH |
104 | |
105 | static struct iucv_sock_list iucv_sk_list = { | |
3db8ce35 | 106 | .lock = __RW_LOCK_UNLOCKED(iucv_sk_list.lock), |
eac3731b JH |
107 | .autobind_name = ATOMIC_INIT(0) |
108 | }; | |
109 | ||
110 | static struct iucv_handler af_iucv_handler = { | |
111 | .path_pending = iucv_callback_connreq, | |
112 | .path_complete = iucv_callback_connack, | |
113 | .path_severed = iucv_callback_connrej, | |
114 | .message_pending = iucv_callback_rx, | |
af88b52d HB |
115 | .message_complete = iucv_callback_txdone, |
116 | .path_quiesced = iucv_callback_shutdown, | |
eac3731b JH |
117 | }; |
118 | ||
119 | static inline void high_nmcpy(unsigned char *dst, char *src) | |
120 | { | |
121 | memcpy(dst, src, 8); | |
122 | } | |
123 | ||
124 | static inline void low_nmcpy(unsigned char *dst, char *src) | |
125 | { | |
126 | memcpy(&dst[8], src, 8); | |
127 | } | |
128 | ||
c23cad92 UB |
129 | static int afiucv_pm_prepare(struct device *dev) |
130 | { | |
131 | #ifdef CONFIG_PM_DEBUG | |
132 | printk(KERN_WARNING "afiucv_pm_prepare\n"); | |
133 | #endif | |
134 | return 0; | |
135 | } | |
136 | ||
137 | static void afiucv_pm_complete(struct device *dev) | |
138 | { | |
139 | #ifdef CONFIG_PM_DEBUG | |
140 | printk(KERN_WARNING "afiucv_pm_complete\n"); | |
141 | #endif | |
c23cad92 UB |
142 | } |
143 | ||
144 | /** | |
145 | * afiucv_pm_freeze() - Freeze PM callback | |
146 | * @dev: AFIUCV dummy device | |
147 | * | |
148 | * Sever all established IUCV communication pathes | |
149 | */ | |
150 | static int afiucv_pm_freeze(struct device *dev) | |
151 | { | |
152 | struct iucv_sock *iucv; | |
153 | struct sock *sk; | |
c23cad92 UB |
154 | |
155 | #ifdef CONFIG_PM_DEBUG | |
156 | printk(KERN_WARNING "afiucv_pm_freeze\n"); | |
157 | #endif | |
158 | read_lock(&iucv_sk_list.lock); | |
b67bfe0d | 159 | sk_for_each(sk, &iucv_sk_list.head) { |
c23cad92 | 160 | iucv = iucv_sk(sk); |
c23cad92 | 161 | switch (sk->sk_state) { |
c23cad92 UB |
162 | case IUCV_DISCONN: |
163 | case IUCV_CLOSING: | |
164 | case IUCV_CONNECTED: | |
7d316b94 | 165 | iucv_sever_path(sk, 0); |
c23cad92 UB |
166 | break; |
167 | case IUCV_OPEN: | |
168 | case IUCV_BOUND: | |
169 | case IUCV_LISTEN: | |
170 | case IUCV_CLOSED: | |
171 | default: | |
172 | break; | |
173 | } | |
7d316b94 UB |
174 | skb_queue_purge(&iucv->send_skb_q); |
175 | skb_queue_purge(&iucv->backlog_skb_q); | |
c23cad92 UB |
176 | } |
177 | read_unlock(&iucv_sk_list.lock); | |
fb3b467e | 178 | return 0; |
c23cad92 UB |
179 | } |
180 | ||
181 | /** | |
182 | * afiucv_pm_restore_thaw() - Thaw and restore PM callback | |
183 | * @dev: AFIUCV dummy device | |
184 | * | |
185 | * socket clean up after freeze | |
186 | */ | |
187 | static int afiucv_pm_restore_thaw(struct device *dev) | |
188 | { | |
c23cad92 | 189 | struct sock *sk; |
c23cad92 UB |
190 | |
191 | #ifdef CONFIG_PM_DEBUG | |
192 | printk(KERN_WARNING "afiucv_pm_restore_thaw\n"); | |
193 | #endif | |
194 | read_lock(&iucv_sk_list.lock); | |
b67bfe0d | 195 | sk_for_each(sk, &iucv_sk_list.head) { |
c23cad92 UB |
196 | switch (sk->sk_state) { |
197 | case IUCV_CONNECTED: | |
198 | sk->sk_err = EPIPE; | |
199 | sk->sk_state = IUCV_DISCONN; | |
200 | sk->sk_state_change(sk); | |
201 | break; | |
202 | case IUCV_DISCONN: | |
c23cad92 UB |
203 | case IUCV_CLOSING: |
204 | case IUCV_LISTEN: | |
205 | case IUCV_BOUND: | |
206 | case IUCV_OPEN: | |
207 | default: | |
208 | break; | |
209 | } | |
210 | } | |
211 | read_unlock(&iucv_sk_list.lock); | |
212 | return 0; | |
213 | } | |
214 | ||
47145210 | 215 | static const struct dev_pm_ops afiucv_pm_ops = { |
c23cad92 UB |
216 | .prepare = afiucv_pm_prepare, |
217 | .complete = afiucv_pm_complete, | |
218 | .freeze = afiucv_pm_freeze, | |
219 | .thaw = afiucv_pm_restore_thaw, | |
220 | .restore = afiucv_pm_restore_thaw, | |
221 | }; | |
222 | ||
223 | static struct device_driver af_iucv_driver = { | |
224 | .owner = THIS_MODULE, | |
225 | .name = "afiucv", | |
6fcd61f7 | 226 | .bus = NULL, |
c23cad92 UB |
227 | .pm = &afiucv_pm_ops, |
228 | }; | |
229 | ||
230 | /* dummy device used as trigger for PM functions */ | |
231 | static struct device *af_iucv_dev; | |
232 | ||
b8942e3b HB |
233 | /** |
234 | * iucv_msg_length() - Returns the length of an iucv message. | |
235 | * @msg: Pointer to struct iucv_message, MUST NOT be NULL | |
236 | * | |
237 | * The function returns the length of the specified iucv message @msg of data | |
238 | * stored in a buffer and of data stored in the parameter list (PRMDATA). | |
239 | * | |
240 | * For IUCV_IPRMDATA, AF_IUCV uses the following convention to transport socket | |
241 | * data: | |
242 | * PRMDATA[0..6] socket data (max 7 bytes); | |
243 | * PRMDATA[7] socket data length value (len is 0xff - PRMDATA[7]) | |
244 | * | |
25985edc | 245 | * The socket data length is computed by subtracting the socket data length |
b8942e3b HB |
246 | * value from 0xFF. |
247 | * If the socket data len is greater 7, then PRMDATA can be used for special | |
248 | * notifications (see iucv_sock_shutdown); and further, | |
249 | * if the socket data len is > 7, the function returns 8. | |
250 | * | |
251 | * Use this function to allocate socket buffers to store iucv message data. | |
252 | */ | |
253 | static inline size_t iucv_msg_length(struct iucv_message *msg) | |
254 | { | |
255 | size_t datalen; | |
256 | ||
257 | if (msg->flags & IUCV_IPRMDATA) { | |
258 | datalen = 0xff - msg->rmmsg[7]; | |
259 | return (datalen < 8) ? datalen : 8; | |
260 | } | |
261 | return msg->length; | |
262 | } | |
263 | ||
0ea920d2 HB |
264 | /** |
265 | * iucv_sock_in_state() - check for specific states | |
266 | * @sk: sock structure | |
267 | * @state: first iucv sk state | |
268 | * @state: second iucv sk state | |
269 | * | |
270 | * Returns true if the socket in either in the first or second state. | |
271 | */ | |
272 | static int iucv_sock_in_state(struct sock *sk, int state, int state2) | |
273 | { | |
274 | return (sk->sk_state == state || sk->sk_state == state2); | |
275 | } | |
276 | ||
277 | /** | |
278 | * iucv_below_msglim() - function to check if messages can be sent | |
279 | * @sk: sock structure | |
280 | * | |
281 | * Returns true if the send queue length is lower than the message limit. | |
282 | * Always returns true if the socket is not connected (no iucv path for | |
283 | * checking the message limit). | |
284 | */ | |
285 | static inline int iucv_below_msglim(struct sock *sk) | |
286 | { | |
287 | struct iucv_sock *iucv = iucv_sk(sk); | |
288 | ||
289 | if (sk->sk_state != IUCV_CONNECTED) | |
290 | return 1; | |
3881ac44 UB |
291 | if (iucv->transport == AF_IUCV_TRANS_IUCV) |
292 | return (skb_queue_len(&iucv->send_skb_q) < iucv->path->msglim); | |
293 | else | |
294 | return ((atomic_read(&iucv->msg_sent) < iucv->msglimit_peer) && | |
295 | (atomic_read(&iucv->pendings) <= 0)); | |
0ea920d2 HB |
296 | } |
297 | ||
298 | /** | |
299 | * iucv_sock_wake_msglim() - Wake up thread waiting on msg limit | |
300 | */ | |
301 | static void iucv_sock_wake_msglim(struct sock *sk) | |
302 | { | |
43815482 ED |
303 | struct socket_wq *wq; |
304 | ||
305 | rcu_read_lock(); | |
306 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 307 | if (skwq_has_sleeper(wq)) |
43815482 | 308 | wake_up_interruptible_all(&wq->wait); |
0ea920d2 | 309 | sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT); |
43815482 | 310 | rcu_read_unlock(); |
0ea920d2 HB |
311 | } |
312 | ||
3881ac44 UB |
313 | /** |
314 | * afiucv_hs_send() - send a message through HiperSockets transport | |
315 | */ | |
316 | static int afiucv_hs_send(struct iucv_message *imsg, struct sock *sock, | |
317 | struct sk_buff *skb, u8 flags) | |
318 | { | |
3881ac44 UB |
319 | struct iucv_sock *iucv = iucv_sk(sock); |
320 | struct af_iucv_trans_hdr *phs_hdr; | |
321 | struct sk_buff *nskb; | |
322 | int err, confirm_recv = 0; | |
323 | ||
cd11d112 JW |
324 | phs_hdr = skb_push(skb, sizeof(*phs_hdr)); |
325 | memset(phs_hdr, 0, sizeof(*phs_hdr)); | |
3881ac44 | 326 | skb_reset_network_header(skb); |
3881ac44 UB |
327 | |
328 | phs_hdr->magic = ETH_P_AF_IUCV; | |
329 | phs_hdr->version = 1; | |
330 | phs_hdr->flags = flags; | |
331 | if (flags == AF_IUCV_FLAG_SYN) | |
332 | phs_hdr->window = iucv->msglimit; | |
333 | else if ((flags == AF_IUCV_FLAG_WIN) || !flags) { | |
334 | confirm_recv = atomic_read(&iucv->msg_recv); | |
335 | phs_hdr->window = confirm_recv; | |
336 | if (confirm_recv) | |
337 | phs_hdr->flags = phs_hdr->flags | AF_IUCV_FLAG_WIN; | |
338 | } | |
339 | memcpy(phs_hdr->destUserID, iucv->dst_user_id, 8); | |
340 | memcpy(phs_hdr->destAppName, iucv->dst_name, 8); | |
341 | memcpy(phs_hdr->srcUserID, iucv->src_user_id, 8); | |
342 | memcpy(phs_hdr->srcAppName, iucv->src_name, 8); | |
343 | ASCEBC(phs_hdr->destUserID, sizeof(phs_hdr->destUserID)); | |
344 | ASCEBC(phs_hdr->destAppName, sizeof(phs_hdr->destAppName)); | |
345 | ASCEBC(phs_hdr->srcUserID, sizeof(phs_hdr->srcUserID)); | |
346 | ASCEBC(phs_hdr->srcAppName, sizeof(phs_hdr->srcAppName)); | |
347 | if (imsg) | |
348 | memcpy(&phs_hdr->iucv_hdr, imsg, sizeof(struct iucv_message)); | |
349 | ||
cd11d112 JW |
350 | skb_push(skb, ETH_HLEN); |
351 | memset(skb->data, 0, ETH_HLEN); | |
352 | ||
800c5eb7 | 353 | skb->dev = iucv->hs_dev; |
b2f54394 JW |
354 | if (!skb->dev) { |
355 | err = -ENODEV; | |
356 | goto err_free; | |
357 | } | |
358 | if (!(skb->dev->flags & IFF_UP) || !netif_carrier_ok(skb->dev)) { | |
359 | err = -ENETDOWN; | |
360 | goto err_free; | |
361 | } | |
3881ac44 | 362 | if (skb->len > skb->dev->mtu) { |
b2f54394 JW |
363 | if (sock->sk_type == SOCK_SEQPACKET) { |
364 | err = -EMSGSIZE; | |
365 | goto err_free; | |
366 | } | |
367 | skb_trim(skb, skb->dev->mtu); | |
3881ac44 | 368 | } |
2e56c26b | 369 | skb->protocol = cpu_to_be16(ETH_P_AF_IUCV); |
3881ac44 | 370 | nskb = skb_clone(skb, GFP_ATOMIC); |
b2f54394 JW |
371 | if (!nskb) { |
372 | err = -ENOMEM; | |
373 | goto err_free; | |
374 | } | |
375 | ||
3881ac44 UB |
376 | skb_queue_tail(&iucv->send_skb_q, nskb); |
377 | err = dev_queue_xmit(skb); | |
800c5eb7 | 378 | if (net_xmit_eval(err)) { |
3881ac44 UB |
379 | skb_unlink(nskb, &iucv->send_skb_q); |
380 | kfree_skb(nskb); | |
381 | } else { | |
382 | atomic_sub(confirm_recv, &iucv->msg_recv); | |
383 | WARN_ON(atomic_read(&iucv->msg_recv) < 0); | |
384 | } | |
800c5eb7 | 385 | return net_xmit_eval(err); |
b2f54394 JW |
386 | |
387 | err_free: | |
388 | kfree_skb(skb); | |
389 | return err; | |
3881ac44 UB |
390 | } |
391 | ||
eac3731b JH |
392 | static struct sock *__iucv_get_sock_by_name(char *nm) |
393 | { | |
394 | struct sock *sk; | |
eac3731b | 395 | |
b67bfe0d | 396 | sk_for_each(sk, &iucv_sk_list.head) |
eac3731b JH |
397 | if (!memcmp(&iucv_sk(sk)->src_name, nm, 8)) |
398 | return sk; | |
399 | ||
400 | return NULL; | |
401 | } | |
402 | ||
403 | static void iucv_sock_destruct(struct sock *sk) | |
404 | { | |
405 | skb_queue_purge(&sk->sk_receive_queue); | |
82492a35 UB |
406 | skb_queue_purge(&sk->sk_error_queue); |
407 | ||
408 | sk_mem_reclaim(sk); | |
409 | ||
410 | if (!sock_flag(sk, SOCK_DEAD)) { | |
411 | pr_err("Attempt to release alive iucv socket %p\n", sk); | |
412 | return; | |
413 | } | |
414 | ||
415 | WARN_ON(atomic_read(&sk->sk_rmem_alloc)); | |
b2c9c5df | 416 | WARN_ON(refcount_read(&sk->sk_wmem_alloc)); |
82492a35 UB |
417 | WARN_ON(sk->sk_wmem_queued); |
418 | WARN_ON(sk->sk_forward_alloc); | |
eac3731b JH |
419 | } |
420 | ||
421 | /* Cleanup Listen */ | |
422 | static void iucv_sock_cleanup_listen(struct sock *parent) | |
423 | { | |
424 | struct sock *sk; | |
425 | ||
426 | /* Close non-accepted connections */ | |
427 | while ((sk = iucv_accept_dequeue(parent, NULL))) { | |
428 | iucv_sock_close(sk); | |
429 | iucv_sock_kill(sk); | |
430 | } | |
431 | ||
432 | parent->sk_state = IUCV_CLOSED; | |
eac3731b JH |
433 | } |
434 | ||
7514bab0 | 435 | /* Kill socket (only if zapped and orphaned) */ |
eac3731b JH |
436 | static void iucv_sock_kill(struct sock *sk) |
437 | { | |
438 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
439 | return; | |
440 | ||
441 | iucv_sock_unlink(&iucv_sk_list, sk); | |
442 | sock_set_flag(sk, SOCK_DEAD); | |
443 | sock_put(sk); | |
444 | } | |
445 | ||
7d316b94 UB |
446 | /* Terminate an IUCV path */ |
447 | static void iucv_sever_path(struct sock *sk, int with_user_data) | |
448 | { | |
449 | unsigned char user_data[16]; | |
450 | struct iucv_sock *iucv = iucv_sk(sk); | |
451 | struct iucv_path *path = iucv->path; | |
452 | ||
453 | if (iucv->path) { | |
454 | iucv->path = NULL; | |
455 | if (with_user_data) { | |
456 | low_nmcpy(user_data, iucv->src_name); | |
457 | high_nmcpy(user_data, iucv->dst_name); | |
458 | ASCEBC(user_data, sizeof(user_data)); | |
459 | pr_iucv->path_sever(path, user_data); | |
460 | } else | |
461 | pr_iucv->path_sever(path, NULL); | |
462 | iucv_path_free(path); | |
463 | } | |
464 | } | |
465 | ||
4e0ad322 | 466 | /* Send controlling flags through an IUCV socket for HIPER transport */ |
9fbd87d4 UB |
467 | static int iucv_send_ctrl(struct sock *sk, u8 flags) |
468 | { | |
469 | int err = 0; | |
470 | int blen; | |
471 | struct sk_buff *skb; | |
4e0ad322 | 472 | u8 shutdown = 0; |
9fbd87d4 UB |
473 | |
474 | blen = sizeof(struct af_iucv_trans_hdr) + ETH_HLEN; | |
4e0ad322 UB |
475 | if (sk->sk_shutdown & SEND_SHUTDOWN) { |
476 | /* controlling flags should be sent anyway */ | |
477 | shutdown = sk->sk_shutdown; | |
478 | sk->sk_shutdown &= RCV_SHUTDOWN; | |
479 | } | |
9fbd87d4 UB |
480 | skb = sock_alloc_send_skb(sk, blen, 1, &err); |
481 | if (skb) { | |
482 | skb_reserve(skb, blen); | |
483 | err = afiucv_hs_send(NULL, sk, skb, flags); | |
484 | } | |
4e0ad322 UB |
485 | if (shutdown) |
486 | sk->sk_shutdown = shutdown; | |
9fbd87d4 UB |
487 | return err; |
488 | } | |
489 | ||
eac3731b JH |
490 | /* Close an IUCV socket */ |
491 | static void iucv_sock_close(struct sock *sk) | |
492 | { | |
eac3731b | 493 | struct iucv_sock *iucv = iucv_sk(sk); |
561e0360 | 494 | unsigned long timeo; |
800c5eb7 | 495 | int err = 0; |
eac3731b | 496 | |
eac3731b JH |
497 | lock_sock(sk); |
498 | ||
da99f056 | 499 | switch (sk->sk_state) { |
eac3731b JH |
500 | case IUCV_LISTEN: |
501 | iucv_sock_cleanup_listen(sk); | |
502 | break; | |
503 | ||
504 | case IUCV_CONNECTED: | |
3881ac44 | 505 | if (iucv->transport == AF_IUCV_TRANS_HIPER) { |
9fbd87d4 | 506 | err = iucv_send_ctrl(sk, AF_IUCV_FLAG_FIN); |
3881ac44 UB |
507 | sk->sk_state = IUCV_DISCONN; |
508 | sk->sk_state_change(sk); | |
509 | } | |
816abbad | 510 | case IUCV_DISCONN: /* fall through */ |
561e0360 JH |
511 | sk->sk_state = IUCV_CLOSING; |
512 | sk->sk_state_change(sk); | |
513 | ||
800c5eb7 | 514 | if (!err && !skb_queue_empty(&iucv->send_skb_q)) { |
561e0360 JH |
515 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) |
516 | timeo = sk->sk_lingertime; | |
517 | else | |
518 | timeo = IUCV_DISCONN_TIMEOUT; | |
9f6298a6 | 519 | iucv_sock_wait(sk, |
0ea920d2 HB |
520 | iucv_sock_in_state(sk, IUCV_CLOSED, 0), |
521 | timeo); | |
561e0360 JH |
522 | } |
523 | ||
bbe188c8 | 524 | case IUCV_CLOSING: /* fall through */ |
561e0360 JH |
525 | sk->sk_state = IUCV_CLOSED; |
526 | sk->sk_state_change(sk); | |
527 | ||
eac3731b JH |
528 | sk->sk_err = ECONNRESET; |
529 | sk->sk_state_change(sk); | |
530 | ||
800c5eb7 | 531 | skb_queue_purge(&iucv->send_skb_q); |
561e0360 | 532 | skb_queue_purge(&iucv->backlog_skb_q); |
eac3731b | 533 | |
7d316b94 UB |
534 | default: /* fall through */ |
535 | iucv_sever_path(sk, 1); | |
3ff50b79 | 536 | } |
eac3731b | 537 | |
800c5eb7 UB |
538 | if (iucv->hs_dev) { |
539 | dev_put(iucv->hs_dev); | |
540 | iucv->hs_dev = NULL; | |
541 | sk->sk_bound_dev_if = 0; | |
542 | } | |
543 | ||
7514bab0 HB |
544 | /* mark socket for deletion by iucv_sock_kill() */ |
545 | sock_set_flag(sk, SOCK_ZAPPED); | |
546 | ||
eac3731b | 547 | release_sock(sk); |
eac3731b JH |
548 | } |
549 | ||
550 | static void iucv_sock_init(struct sock *sk, struct sock *parent) | |
551 | { | |
02f06918 | 552 | if (parent) { |
eac3731b | 553 | sk->sk_type = parent->sk_type; |
02f06918 PM |
554 | security_sk_clone(parent, sk); |
555 | } | |
eac3731b JH |
556 | } |
557 | ||
11aa9c28 | 558 | static struct sock *iucv_sock_alloc(struct socket *sock, int proto, gfp_t prio, int kern) |
eac3731b JH |
559 | { |
560 | struct sock *sk; | |
493d3971 | 561 | struct iucv_sock *iucv; |
eac3731b | 562 | |
11aa9c28 | 563 | sk = sk_alloc(&init_net, PF_IUCV, prio, &iucv_proto, kern); |
eac3731b JH |
564 | if (!sk) |
565 | return NULL; | |
493d3971 | 566 | iucv = iucv_sk(sk); |
eac3731b JH |
567 | |
568 | sock_init_data(sock, sk); | |
493d3971 UB |
569 | INIT_LIST_HEAD(&iucv->accept_q); |
570 | spin_lock_init(&iucv->accept_q_lock); | |
571 | skb_queue_head_init(&iucv->send_skb_q); | |
572 | INIT_LIST_HEAD(&iucv->message_q.list); | |
573 | spin_lock_init(&iucv->message_q.lock); | |
574 | skb_queue_head_init(&iucv->backlog_skb_q); | |
575 | iucv->send_tag = 0; | |
3881ac44 | 576 | atomic_set(&iucv->pendings, 0); |
493d3971 | 577 | iucv->flags = 0; |
3881ac44 UB |
578 | iucv->msglimit = 0; |
579 | atomic_set(&iucv->msg_sent, 0); | |
580 | atomic_set(&iucv->msg_recv, 0); | |
493d3971 | 581 | iucv->path = NULL; |
3881ac44 | 582 | iucv->sk_txnotify = afiucv_hs_callback_txnotify; |
493d3971 | 583 | memset(&iucv->src_user_id , 0, 32); |
3881ac44 UB |
584 | if (pr_iucv) |
585 | iucv->transport = AF_IUCV_TRANS_IUCV; | |
586 | else | |
587 | iucv->transport = AF_IUCV_TRANS_HIPER; | |
eac3731b JH |
588 | |
589 | sk->sk_destruct = iucv_sock_destruct; | |
590 | sk->sk_sndtimeo = IUCV_CONN_TIMEOUT; | |
591 | sk->sk_allocation = GFP_DMA; | |
592 | ||
593 | sock_reset_flag(sk, SOCK_ZAPPED); | |
594 | ||
595 | sk->sk_protocol = proto; | |
596 | sk->sk_state = IUCV_OPEN; | |
597 | ||
eac3731b JH |
598 | iucv_sock_link(&iucv_sk_list, sk); |
599 | return sk; | |
600 | } | |
601 | ||
602 | /* Create an IUCV socket */ | |
3f378b68 EP |
603 | static int iucv_sock_create(struct net *net, struct socket *sock, int protocol, |
604 | int kern) | |
eac3731b JH |
605 | { |
606 | struct sock *sk; | |
607 | ||
aa8e71f5 HB |
608 | if (protocol && protocol != PF_IUCV) |
609 | return -EPROTONOSUPPORT; | |
eac3731b JH |
610 | |
611 | sock->state = SS_UNCONNECTED; | |
aa8e71f5 HB |
612 | |
613 | switch (sock->type) { | |
614 | case SOCK_STREAM: | |
615 | sock->ops = &iucv_sock_ops; | |
616 | break; | |
617 | case SOCK_SEQPACKET: | |
618 | /* currently, proto ops can handle both sk types */ | |
619 | sock->ops = &iucv_sock_ops; | |
620 | break; | |
621 | default: | |
622 | return -ESOCKTNOSUPPORT; | |
623 | } | |
eac3731b | 624 | |
11aa9c28 | 625 | sk = iucv_sock_alloc(sock, protocol, GFP_KERNEL, kern); |
eac3731b JH |
626 | if (!sk) |
627 | return -ENOMEM; | |
628 | ||
629 | iucv_sock_init(sk, NULL); | |
630 | ||
631 | return 0; | |
632 | } | |
633 | ||
634 | void iucv_sock_link(struct iucv_sock_list *l, struct sock *sk) | |
635 | { | |
636 | write_lock_bh(&l->lock); | |
637 | sk_add_node(sk, &l->head); | |
638 | write_unlock_bh(&l->lock); | |
639 | } | |
640 | ||
641 | void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *sk) | |
642 | { | |
643 | write_lock_bh(&l->lock); | |
644 | sk_del_node_init(sk); | |
645 | write_unlock_bh(&l->lock); | |
646 | } | |
647 | ||
648 | void iucv_accept_enqueue(struct sock *parent, struct sock *sk) | |
649 | { | |
febca281 UB |
650 | unsigned long flags; |
651 | struct iucv_sock *par = iucv_sk(parent); | |
652 | ||
eac3731b | 653 | sock_hold(sk); |
febca281 UB |
654 | spin_lock_irqsave(&par->accept_q_lock, flags); |
655 | list_add_tail(&iucv_sk(sk)->accept_q, &par->accept_q); | |
656 | spin_unlock_irqrestore(&par->accept_q_lock, flags); | |
eac3731b | 657 | iucv_sk(sk)->parent = parent; |
49f5eba7 | 658 | sk_acceptq_added(parent); |
eac3731b JH |
659 | } |
660 | ||
661 | void iucv_accept_unlink(struct sock *sk) | |
662 | { | |
febca281 UB |
663 | unsigned long flags; |
664 | struct iucv_sock *par = iucv_sk(iucv_sk(sk)->parent); | |
665 | ||
666 | spin_lock_irqsave(&par->accept_q_lock, flags); | |
eac3731b | 667 | list_del_init(&iucv_sk(sk)->accept_q); |
febca281 | 668 | spin_unlock_irqrestore(&par->accept_q_lock, flags); |
49f5eba7 | 669 | sk_acceptq_removed(iucv_sk(sk)->parent); |
eac3731b JH |
670 | iucv_sk(sk)->parent = NULL; |
671 | sock_put(sk); | |
672 | } | |
673 | ||
674 | struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock) | |
675 | { | |
676 | struct iucv_sock *isk, *n; | |
677 | struct sock *sk; | |
678 | ||
da99f056 | 679 | list_for_each_entry_safe(isk, n, &iucv_sk(parent)->accept_q, accept_q) { |
eac3731b JH |
680 | sk = (struct sock *) isk; |
681 | lock_sock(sk); | |
682 | ||
683 | if (sk->sk_state == IUCV_CLOSED) { | |
eac3731b | 684 | iucv_accept_unlink(sk); |
febca281 | 685 | release_sock(sk); |
eac3731b JH |
686 | continue; |
687 | } | |
688 | ||
689 | if (sk->sk_state == IUCV_CONNECTED || | |
aac6399c | 690 | sk->sk_state == IUCV_DISCONN || |
eac3731b JH |
691 | !newsock) { |
692 | iucv_accept_unlink(sk); | |
693 | if (newsock) | |
694 | sock_graft(sk, newsock); | |
695 | ||
eac3731b JH |
696 | release_sock(sk); |
697 | return sk; | |
698 | } | |
699 | ||
700 | release_sock(sk); | |
701 | } | |
702 | return NULL; | |
703 | } | |
704 | ||
53a4b499 PH |
705 | static void __iucv_auto_name(struct iucv_sock *iucv) |
706 | { | |
707 | char name[12]; | |
708 | ||
709 | sprintf(name, "%08x", atomic_inc_return(&iucv_sk_list.autobind_name)); | |
710 | while (__iucv_get_sock_by_name(name)) { | |
711 | sprintf(name, "%08x", | |
712 | atomic_inc_return(&iucv_sk_list.autobind_name)); | |
713 | } | |
714 | memcpy(iucv->src_name, name, 8); | |
715 | } | |
716 | ||
eac3731b JH |
717 | /* Bind an unbound socket */ |
718 | static int iucv_sock_bind(struct socket *sock, struct sockaddr *addr, | |
719 | int addr_len) | |
720 | { | |
721 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
722 | struct sock *sk = sock->sk; | |
723 | struct iucv_sock *iucv; | |
3881ac44 UB |
724 | int err = 0; |
725 | struct net_device *dev; | |
726 | char uid[9]; | |
eac3731b JH |
727 | |
728 | /* Verify the input sockaddr */ | |
e3c42b61 MJ |
729 | if (addr_len < sizeof(struct sockaddr_iucv) || |
730 | addr->sa_family != AF_IUCV) | |
52a82e23 UB |
731 | return -EINVAL; |
732 | ||
eac3731b JH |
733 | lock_sock(sk); |
734 | if (sk->sk_state != IUCV_OPEN) { | |
735 | err = -EBADFD; | |
736 | goto done; | |
737 | } | |
738 | ||
739 | write_lock_bh(&iucv_sk_list.lock); | |
740 | ||
741 | iucv = iucv_sk(sk); | |
742 | if (__iucv_get_sock_by_name(sa->siucv_name)) { | |
743 | err = -EADDRINUSE; | |
744 | goto done_unlock; | |
745 | } | |
3881ac44 | 746 | if (iucv->path) |
eac3731b | 747 | goto done_unlock; |
eac3731b JH |
748 | |
749 | /* Bind the socket */ | |
3881ac44 UB |
750 | if (pr_iucv) |
751 | if (!memcmp(sa->siucv_user_id, iucv_userid, 8)) | |
752 | goto vm_bind; /* VM IUCV transport */ | |
eac3731b | 753 | |
3881ac44 UB |
754 | /* try hiper transport */ |
755 | memcpy(uid, sa->siucv_user_id, sizeof(uid)); | |
756 | ASCEBC(uid, 8); | |
757 | rcu_read_lock(); | |
758 | for_each_netdev_rcu(&init_net, dev) { | |
759 | if (!memcmp(dev->perm_addr, uid, 8)) { | |
3881ac44 | 760 | memcpy(iucv->src_user_id, sa->siucv_user_id, 8); |
53a4b499 PH |
761 | /* Check for unitialized siucv_name */ |
762 | if (strncmp(sa->siucv_name, " ", 8) == 0) | |
763 | __iucv_auto_name(iucv); | |
764 | else | |
765 | memcpy(iucv->src_name, sa->siucv_name, 8); | |
816abbad | 766 | sk->sk_bound_dev_if = dev->ifindex; |
800c5eb7 UB |
767 | iucv->hs_dev = dev; |
768 | dev_hold(dev); | |
3881ac44 UB |
769 | sk->sk_state = IUCV_BOUND; |
770 | iucv->transport = AF_IUCV_TRANS_HIPER; | |
771 | if (!iucv->msglimit) | |
772 | iucv->msglimit = IUCV_HIPER_MSGLIM_DEFAULT; | |
773 | rcu_read_unlock(); | |
774 | goto done_unlock; | |
775 | } | |
776 | } | |
777 | rcu_read_unlock(); | |
778 | vm_bind: | |
779 | if (pr_iucv) { | |
780 | /* use local userid for backward compat */ | |
781 | memcpy(iucv->src_name, sa->siucv_name, 8); | |
782 | memcpy(iucv->src_user_id, iucv_userid, 8); | |
783 | sk->sk_state = IUCV_BOUND; | |
784 | iucv->transport = AF_IUCV_TRANS_IUCV; | |
785 | if (!iucv->msglimit) | |
786 | iucv->msglimit = IUCV_QUEUELEN_DEFAULT; | |
787 | goto done_unlock; | |
788 | } | |
789 | /* found no dev to bind */ | |
790 | err = -ENODEV; | |
eac3731b JH |
791 | done_unlock: |
792 | /* Release the socket list lock */ | |
793 | write_unlock_bh(&iucv_sk_list.lock); | |
794 | done: | |
795 | release_sock(sk); | |
796 | return err; | |
797 | } | |
798 | ||
799 | /* Automatically bind an unbound socket */ | |
800 | static int iucv_sock_autobind(struct sock *sk) | |
801 | { | |
802 | struct iucv_sock *iucv = iucv_sk(sk); | |
eac3731b JH |
803 | int err = 0; |
804 | ||
aac6399c | 805 | if (unlikely(!pr_iucv)) |
eac3731b JH |
806 | return -EPROTO; |
807 | ||
aac6399c | 808 | memcpy(iucv->src_user_id, iucv_userid, 8); |
eac3731b JH |
809 | |
810 | write_lock_bh(&iucv_sk_list.lock); | |
53a4b499 | 811 | __iucv_auto_name(iucv); |
eac3731b JH |
812 | write_unlock_bh(&iucv_sk_list.lock); |
813 | ||
3881ac44 UB |
814 | if (!iucv->msglimit) |
815 | iucv->msglimit = IUCV_QUEUELEN_DEFAULT; | |
816 | ||
eac3731b JH |
817 | return err; |
818 | } | |
819 | ||
3881ac44 | 820 | static int afiucv_path_connect(struct socket *sock, struct sockaddr *addr) |
eac3731b JH |
821 | { |
822 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
823 | struct sock *sk = sock->sk; | |
493d3971 | 824 | struct iucv_sock *iucv = iucv_sk(sk); |
eac3731b JH |
825 | unsigned char user_data[16]; |
826 | int err; | |
827 | ||
eac3731b | 828 | high_nmcpy(user_data, sa->siucv_name); |
493d3971 | 829 | low_nmcpy(user_data, iucv->src_name); |
eac3731b JH |
830 | ASCEBC(user_data, sizeof(user_data)); |
831 | ||
eac3731b | 832 | /* Create path. */ |
09488e2e | 833 | iucv->path = iucv_path_alloc(iucv->msglimit, |
b8942e3b | 834 | IUCV_IPRMDATA, GFP_KERNEL); |
d4444722 UB |
835 | if (!iucv->path) { |
836 | err = -ENOMEM; | |
837 | goto done; | |
838 | } | |
6fcd61f7 FB |
839 | err = pr_iucv->path_connect(iucv->path, &af_iucv_handler, |
840 | sa->siucv_user_id, NULL, user_data, | |
841 | sk); | |
eac3731b JH |
842 | if (err) { |
843 | iucv_path_free(iucv->path); | |
844 | iucv->path = NULL; | |
55cdea9e HB |
845 | switch (err) { |
846 | case 0x0b: /* Target communicator is not logged on */ | |
847 | err = -ENETUNREACH; | |
848 | break; | |
849 | case 0x0d: /* Max connections for this guest exceeded */ | |
850 | case 0x0e: /* Max connections for target guest exceeded */ | |
851 | err = -EAGAIN; | |
852 | break; | |
853 | case 0x0f: /* Missing IUCV authorization */ | |
854 | err = -EACCES; | |
855 | break; | |
856 | default: | |
857 | err = -ECONNREFUSED; | |
858 | break; | |
859 | } | |
eac3731b | 860 | } |
3881ac44 UB |
861 | done: |
862 | return err; | |
863 | } | |
eac3731b | 864 | |
3881ac44 UB |
865 | /* Connect an unconnected socket */ |
866 | static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr, | |
867 | int alen, int flags) | |
868 | { | |
869 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
870 | struct sock *sk = sock->sk; | |
871 | struct iucv_sock *iucv = iucv_sk(sk); | |
872 | int err; | |
873 | ||
e3c42b61 | 874 | if (alen < sizeof(struct sockaddr_iucv) || addr->sa_family != AF_IUCV) |
3881ac44 UB |
875 | return -EINVAL; |
876 | ||
877 | if (sk->sk_state != IUCV_OPEN && sk->sk_state != IUCV_BOUND) | |
878 | return -EBADFD; | |
879 | ||
880 | if (sk->sk_state == IUCV_OPEN && | |
881 | iucv->transport == AF_IUCV_TRANS_HIPER) | |
882 | return -EBADFD; /* explicit bind required */ | |
883 | ||
884 | if (sk->sk_type != SOCK_STREAM && sk->sk_type != SOCK_SEQPACKET) | |
885 | return -EINVAL; | |
886 | ||
887 | if (sk->sk_state == IUCV_OPEN) { | |
888 | err = iucv_sock_autobind(sk); | |
889 | if (unlikely(err)) | |
890 | return err; | |
891 | } | |
892 | ||
893 | lock_sock(sk); | |
894 | ||
895 | /* Set the destination information */ | |
896 | memcpy(iucv->dst_user_id, sa->siucv_user_id, 8); | |
897 | memcpy(iucv->dst_name, sa->siucv_name, 8); | |
898 | ||
899 | if (iucv->transport == AF_IUCV_TRANS_HIPER) | |
9fbd87d4 | 900 | err = iucv_send_ctrl(sock->sk, AF_IUCV_FLAG_SYN); |
3881ac44 UB |
901 | else |
902 | err = afiucv_path_connect(sock, addr); | |
903 | if (err) | |
904 | goto done; | |
905 | ||
906 | if (sk->sk_state != IUCV_CONNECTED) | |
0ea920d2 HB |
907 | err = iucv_sock_wait(sk, iucv_sock_in_state(sk, IUCV_CONNECTED, |
908 | IUCV_DISCONN), | |
909 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
eac3731b | 910 | |
3881ac44 | 911 | if (sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_CLOSED) |
b8942e3b | 912 | err = -ECONNREFUSED; |
18becbc5 | 913 | |
7d316b94 UB |
914 | if (err && iucv->transport == AF_IUCV_TRANS_IUCV) |
915 | iucv_sever_path(sk, 0); | |
18becbc5 | 916 | |
eac3731b JH |
917 | done: |
918 | release_sock(sk); | |
919 | return err; | |
920 | } | |
921 | ||
922 | /* Move a socket into listening state. */ | |
923 | static int iucv_sock_listen(struct socket *sock, int backlog) | |
924 | { | |
925 | struct sock *sk = sock->sk; | |
926 | int err; | |
927 | ||
928 | lock_sock(sk); | |
929 | ||
930 | err = -EINVAL; | |
aa8e71f5 HB |
931 | if (sk->sk_state != IUCV_BOUND) |
932 | goto done; | |
933 | ||
934 | if (sock->type != SOCK_STREAM && sock->type != SOCK_SEQPACKET) | |
eac3731b JH |
935 | goto done; |
936 | ||
937 | sk->sk_max_ack_backlog = backlog; | |
938 | sk->sk_ack_backlog = 0; | |
939 | sk->sk_state = IUCV_LISTEN; | |
940 | err = 0; | |
941 | ||
942 | done: | |
943 | release_sock(sk); | |
944 | return err; | |
945 | } | |
946 | ||
947 | /* Accept a pending connection */ | |
948 | static int iucv_sock_accept(struct socket *sock, struct socket *newsock, | |
cdfbabfb | 949 | int flags, bool kern) |
eac3731b JH |
950 | { |
951 | DECLARE_WAITQUEUE(wait, current); | |
952 | struct sock *sk = sock->sk, *nsk; | |
953 | long timeo; | |
954 | int err = 0; | |
955 | ||
561e0360 | 956 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
eac3731b JH |
957 | |
958 | if (sk->sk_state != IUCV_LISTEN) { | |
959 | err = -EBADFD; | |
960 | goto done; | |
961 | } | |
962 | ||
963 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
964 | ||
965 | /* Wait for an incoming connection */ | |
aa395145 | 966 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
da99f056 | 967 | while (!(nsk = iucv_accept_dequeue(sk, newsock))) { |
eac3731b JH |
968 | set_current_state(TASK_INTERRUPTIBLE); |
969 | if (!timeo) { | |
970 | err = -EAGAIN; | |
971 | break; | |
972 | } | |
973 | ||
974 | release_sock(sk); | |
975 | timeo = schedule_timeout(timeo); | |
561e0360 | 976 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
eac3731b JH |
977 | |
978 | if (sk->sk_state != IUCV_LISTEN) { | |
979 | err = -EBADFD; | |
980 | break; | |
981 | } | |
982 | ||
983 | if (signal_pending(current)) { | |
984 | err = sock_intr_errno(timeo); | |
985 | break; | |
986 | } | |
987 | } | |
988 | ||
989 | set_current_state(TASK_RUNNING); | |
aa395145 | 990 | remove_wait_queue(sk_sleep(sk), &wait); |
eac3731b JH |
991 | |
992 | if (err) | |
993 | goto done; | |
994 | ||
995 | newsock->state = SS_CONNECTED; | |
996 | ||
997 | done: | |
998 | release_sock(sk); | |
999 | return err; | |
1000 | } | |
1001 | ||
1002 | static int iucv_sock_getname(struct socket *sock, struct sockaddr *addr, | |
9b2c45d4 | 1003 | int peer) |
eac3731b JH |
1004 | { |
1005 | struct sockaddr_iucv *siucv = (struct sockaddr_iucv *) addr; | |
1006 | struct sock *sk = sock->sk; | |
493d3971 | 1007 | struct iucv_sock *iucv = iucv_sk(sk); |
eac3731b JH |
1008 | |
1009 | addr->sa_family = AF_IUCV; | |
eac3731b JH |
1010 | |
1011 | if (peer) { | |
493d3971 UB |
1012 | memcpy(siucv->siucv_user_id, iucv->dst_user_id, 8); |
1013 | memcpy(siucv->siucv_name, iucv->dst_name, 8); | |
eac3731b | 1014 | } else { |
493d3971 UB |
1015 | memcpy(siucv->siucv_user_id, iucv->src_user_id, 8); |
1016 | memcpy(siucv->siucv_name, iucv->src_name, 8); | |
eac3731b JH |
1017 | } |
1018 | memset(&siucv->siucv_port, 0, sizeof(siucv->siucv_port)); | |
1019 | memset(&siucv->siucv_addr, 0, sizeof(siucv->siucv_addr)); | |
493d3971 | 1020 | memset(&siucv->siucv_nodeid, 0, sizeof(siucv->siucv_nodeid)); |
eac3731b | 1021 | |
9b2c45d4 | 1022 | return sizeof(struct sockaddr_iucv); |
eac3731b JH |
1023 | } |
1024 | ||
b8942e3b HB |
1025 | /** |
1026 | * iucv_send_iprm() - Send socket data in parameter list of an iucv message. | |
1027 | * @path: IUCV path | |
1028 | * @msg: Pointer to a struct iucv_message | |
1029 | * @skb: The socket data to send, skb->len MUST BE <= 7 | |
1030 | * | |
1031 | * Send the socket data in the parameter list in the iucv message | |
1032 | * (IUCV_IPRMDATA). The socket data is stored at index 0 to 6 in the parameter | |
1033 | * list and the socket data len at index 7 (last byte). | |
1034 | * See also iucv_msg_length(). | |
1035 | * | |
1036 | * Returns the error code from the iucv_message_send() call. | |
1037 | */ | |
1038 | static int iucv_send_iprm(struct iucv_path *path, struct iucv_message *msg, | |
1039 | struct sk_buff *skb) | |
1040 | { | |
1041 | u8 prmdata[8]; | |
1042 | ||
1043 | memcpy(prmdata, (void *) skb->data, skb->len); | |
1044 | prmdata[7] = 0xff - (u8) skb->len; | |
6fcd61f7 | 1045 | return pr_iucv->message_send(path, msg, IUCV_IPRMDATA, 0, |
b8942e3b HB |
1046 | (void *) prmdata, 8); |
1047 | } | |
1048 | ||
1b784140 YX |
1049 | static int iucv_sock_sendmsg(struct socket *sock, struct msghdr *msg, |
1050 | size_t len) | |
eac3731b JH |
1051 | { |
1052 | struct sock *sk = sock->sk; | |
1053 | struct iucv_sock *iucv = iucv_sk(sk); | |
dc5367bc JW |
1054 | size_t headroom = 0; |
1055 | size_t linear; | |
eac3731b | 1056 | struct sk_buff *skb; |
0506eb01 | 1057 | struct iucv_message txmsg = {0}; |
44b1e6b5 HB |
1058 | struct cmsghdr *cmsg; |
1059 | int cmsg_done; | |
0ea920d2 | 1060 | long timeo; |
8f7c502c UB |
1061 | char user_id[9]; |
1062 | char appl_id[9]; | |
eac3731b | 1063 | int err; |
0ea920d2 | 1064 | int noblock = msg->msg_flags & MSG_DONTWAIT; |
eac3731b JH |
1065 | |
1066 | err = sock_error(sk); | |
1067 | if (err) | |
1068 | return err; | |
1069 | ||
1070 | if (msg->msg_flags & MSG_OOB) | |
1071 | return -EOPNOTSUPP; | |
1072 | ||
aa8e71f5 HB |
1073 | /* SOCK_SEQPACKET: we do not support segmented records */ |
1074 | if (sk->sk_type == SOCK_SEQPACKET && !(msg->msg_flags & MSG_EOR)) | |
1075 | return -EOPNOTSUPP; | |
1076 | ||
eac3731b JH |
1077 | lock_sock(sk); |
1078 | ||
1079 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1080 | err = -EPIPE; | |
1081 | goto out; | |
1082 | } | |
1083 | ||
bb664f49 HB |
1084 | /* Return if the socket is not in connected state */ |
1085 | if (sk->sk_state != IUCV_CONNECTED) { | |
1086 | err = -ENOTCONN; | |
1087 | goto out; | |
1088 | } | |
44b1e6b5 | 1089 | |
bb664f49 HB |
1090 | /* initialize defaults */ |
1091 | cmsg_done = 0; /* check for duplicate headers */ | |
1092 | txmsg.class = 0; | |
44b1e6b5 | 1093 | |
bb664f49 | 1094 | /* iterate over control messages */ |
f95b414e | 1095 | for_each_cmsghdr(cmsg, msg) { |
bb664f49 HB |
1096 | if (!CMSG_OK(msg, cmsg)) { |
1097 | err = -EINVAL; | |
1098 | goto out; | |
1099 | } | |
44b1e6b5 | 1100 | |
bb664f49 HB |
1101 | if (cmsg->cmsg_level != SOL_IUCV) |
1102 | continue; | |
44b1e6b5 | 1103 | |
bb664f49 HB |
1104 | if (cmsg->cmsg_type & cmsg_done) { |
1105 | err = -EINVAL; | |
1106 | goto out; | |
1107 | } | |
1108 | cmsg_done |= cmsg->cmsg_type; | |
44b1e6b5 | 1109 | |
bb664f49 HB |
1110 | switch (cmsg->cmsg_type) { |
1111 | case SCM_IUCV_TRGCLS: | |
1112 | if (cmsg->cmsg_len != CMSG_LEN(TRGCLS_SIZE)) { | |
44b1e6b5 HB |
1113 | err = -EINVAL; |
1114 | goto out; | |
1115 | } | |
44b1e6b5 | 1116 | |
bb664f49 HB |
1117 | /* set iucv message target class */ |
1118 | memcpy(&txmsg.class, | |
1119 | (void *) CMSG_DATA(cmsg), TRGCLS_SIZE); | |
44b1e6b5 | 1120 | |
bb664f49 | 1121 | break; |
44b1e6b5 | 1122 | |
bb664f49 HB |
1123 | default: |
1124 | err = -EINVAL; | |
1125 | goto out; | |
44b1e6b5 | 1126 | } |
bb664f49 | 1127 | } |
44b1e6b5 | 1128 | |
bb664f49 HB |
1129 | /* allocate one skb for each iucv message: |
1130 | * this is fine for SOCK_SEQPACKET (unless we want to support | |
1131 | * segmented records using the MSG_EOR flag), but | |
1132 | * for SOCK_STREAM we might want to improve it in future */ | |
dc5367bc JW |
1133 | if (iucv->transport == AF_IUCV_TRANS_HIPER) { |
1134 | headroom = sizeof(struct af_iucv_trans_hdr) + ETH_HLEN; | |
e5374399 EC |
1135 | linear = len; |
1136 | } else { | |
dc5367bc JW |
1137 | if (len < PAGE_SIZE) { |
1138 | linear = len; | |
1139 | } else { | |
1140 | /* In nonlinear "classic" iucv skb, | |
1141 | * reserve space for iucv_array | |
1142 | */ | |
1143 | headroom = sizeof(struct iucv_array) * | |
1144 | (MAX_SKB_FRAGS + 1); | |
1145 | linear = PAGE_SIZE - headroom; | |
1146 | } | |
e5374399 EC |
1147 | } |
1148 | skb = sock_alloc_send_pskb(sk, headroom + linear, len - linear, | |
1149 | noblock, &err, 0); | |
ed4ac422 | 1150 | if (!skb) |
bb664f49 | 1151 | goto out; |
e5374399 EC |
1152 | if (headroom) |
1153 | skb_reserve(skb, headroom); | |
1154 | skb_put(skb, linear); | |
1155 | skb->len = len; | |
1156 | skb->data_len = len - linear; | |
1157 | err = skb_copy_datagram_from_iter(skb, 0, &msg->msg_iter, len); | |
1158 | if (err) | |
bb664f49 | 1159 | goto fail; |
eac3731b | 1160 | |
0ea920d2 HB |
1161 | /* wait if outstanding messages for iucv path has reached */ |
1162 | timeo = sock_sndtimeo(sk, noblock); | |
1163 | err = iucv_sock_wait(sk, iucv_below_msglim(sk), timeo); | |
1164 | if (err) | |
1165 | goto fail; | |
eac3731b | 1166 | |
0ea920d2 HB |
1167 | /* return -ECONNRESET if the socket is no longer connected */ |
1168 | if (sk->sk_state != IUCV_CONNECTED) { | |
1169 | err = -ECONNRESET; | |
1170 | goto fail; | |
1171 | } | |
b8942e3b | 1172 | |
bb664f49 HB |
1173 | /* increment and save iucv message tag for msg_completion cbk */ |
1174 | txmsg.tag = iucv->send_tag++; | |
f9c41a62 | 1175 | IUCV_SKB_CB(skb)->tag = txmsg.tag; |
800c5eb7 | 1176 | |
3881ac44 UB |
1177 | if (iucv->transport == AF_IUCV_TRANS_HIPER) { |
1178 | atomic_inc(&iucv->msg_sent); | |
1179 | err = afiucv_hs_send(&txmsg, sk, skb, 0); | |
1180 | if (err) { | |
1181 | atomic_dec(&iucv->msg_sent); | |
b2f54394 | 1182 | goto out; |
3881ac44 | 1183 | } |
e5374399 EC |
1184 | } else { /* Classic VM IUCV transport */ |
1185 | skb_queue_tail(&iucv->send_skb_q, skb); | |
1186 | ||
1187 | if (((iucv->path->flags & IUCV_IPRMDATA) & iucv->flags) && | |
1188 | skb->len <= 7) { | |
1189 | err = iucv_send_iprm(iucv->path, &txmsg, skb); | |
1190 | ||
1191 | /* on success: there is no message_complete callback */ | |
1192 | /* for an IPRMDATA msg; remove skb from send queue */ | |
1193 | if (err == 0) { | |
1194 | skb_unlink(skb, &iucv->send_skb_q); | |
1195 | kfree_skb(skb); | |
1196 | } | |
b8942e3b | 1197 | |
e5374399 EC |
1198 | /* this error should never happen since the */ |
1199 | /* IUCV_IPRMDATA path flag is set... sever path */ | |
1200 | if (err == 0x15) { | |
1201 | pr_iucv->path_sever(iucv->path, NULL); | |
1202 | skb_unlink(skb, &iucv->send_skb_q); | |
1203 | err = -EPIPE; | |
1204 | goto fail; | |
1205 | } | |
1206 | } else if (skb_is_nonlinear(skb)) { | |
1207 | struct iucv_array *iba = (struct iucv_array *)skb->head; | |
1208 | int i; | |
1209 | ||
1210 | /* skip iucv_array lying in the headroom */ | |
1211 | iba[0].address = (u32)(addr_t)skb->data; | |
1212 | iba[0].length = (u32)skb_headlen(skb); | |
1213 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1214 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1215 | ||
1216 | iba[i + 1].address = | |
1217 | (u32)(addr_t)skb_frag_address(frag); | |
1218 | iba[i + 1].length = (u32)skb_frag_size(frag); | |
1219 | } | |
1220 | err = pr_iucv->message_send(iucv->path, &txmsg, | |
1221 | IUCV_IPBUFLST, 0, | |
1222 | (void *)iba, skb->len); | |
1223 | } else { /* non-IPRM Linear skb */ | |
1224 | err = pr_iucv->message_send(iucv->path, &txmsg, | |
1225 | 0, 0, (void *)skb->data, skb->len); | |
bb664f49 | 1226 | } |
e5374399 EC |
1227 | if (err) { |
1228 | if (err == 3) { | |
1229 | user_id[8] = 0; | |
1230 | memcpy(user_id, iucv->dst_user_id, 8); | |
1231 | appl_id[8] = 0; | |
1232 | memcpy(appl_id, iucv->dst_name, 8); | |
1233 | pr_err( | |
1234 | "Application %s on z/VM guest %s exceeds message limit\n", | |
1235 | appl_id, user_id); | |
1236 | err = -EAGAIN; | |
1237 | } else { | |
1238 | err = -EPIPE; | |
1239 | } | |
eac3731b | 1240 | skb_unlink(skb, &iucv->send_skb_q); |
eac3731b JH |
1241 | goto fail; |
1242 | } | |
eac3731b JH |
1243 | } |
1244 | ||
1245 | release_sock(sk); | |
1246 | return len; | |
1247 | ||
1248 | fail: | |
1249 | kfree_skb(skb); | |
1250 | out: | |
1251 | release_sock(sk); | |
1252 | return err; | |
1253 | } | |
1254 | ||
a006353a EC |
1255 | static struct sk_buff *alloc_iucv_recv_skb(unsigned long len) |
1256 | { | |
1257 | size_t headroom, linear; | |
1258 | struct sk_buff *skb; | |
1259 | int err; | |
1260 | ||
1261 | if (len < PAGE_SIZE) { | |
1262 | headroom = 0; | |
1263 | linear = len; | |
1264 | } else { | |
1265 | headroom = sizeof(struct iucv_array) * (MAX_SKB_FRAGS + 1); | |
1266 | linear = PAGE_SIZE - headroom; | |
1267 | } | |
1268 | skb = alloc_skb_with_frags(headroom + linear, len - linear, | |
1269 | 0, &err, GFP_ATOMIC | GFP_DMA); | |
1270 | WARN_ONCE(!skb, | |
1271 | "alloc of recv iucv skb len=%lu failed with errcode=%d\n", | |
1272 | len, err); | |
1273 | if (skb) { | |
1274 | if (headroom) | |
1275 | skb_reserve(skb, headroom); | |
1276 | skb_put(skb, linear); | |
1277 | skb->len = len; | |
1278 | skb->data_len = len - linear; | |
1279 | } | |
1280 | return skb; | |
1281 | } | |
1282 | ||
bf95d20f HB |
1283 | /* iucv_process_message() - Receive a single outstanding IUCV message |
1284 | * | |
1285 | * Locking: must be called with message_q.lock held | |
1286 | */ | |
f0703c80 UB |
1287 | static void iucv_process_message(struct sock *sk, struct sk_buff *skb, |
1288 | struct iucv_path *path, | |
1289 | struct iucv_message *msg) | |
1290 | { | |
1291 | int rc; | |
b8942e3b HB |
1292 | unsigned int len; |
1293 | ||
1294 | len = iucv_msg_length(msg); | |
f0703c80 | 1295 | |
44b1e6b5 HB |
1296 | /* store msg target class in the second 4 bytes of skb ctrl buffer */ |
1297 | /* Note: the first 4 bytes are reserved for msg tag */ | |
f9c41a62 | 1298 | IUCV_SKB_CB(skb)->class = msg->class; |
44b1e6b5 | 1299 | |
b8942e3b HB |
1300 | /* check for special IPRM messages (e.g. iucv_sock_shutdown) */ |
1301 | if ((msg->flags & IUCV_IPRMDATA) && len > 7) { | |
1302 | if (memcmp(msg->rmmsg, iprm_shutdown, 8) == 0) { | |
1303 | skb->data = NULL; | |
1304 | skb->len = 0; | |
1305 | } | |
f0703c80 | 1306 | } else { |
a006353a EC |
1307 | if (skb_is_nonlinear(skb)) { |
1308 | struct iucv_array *iba = (struct iucv_array *)skb->head; | |
1309 | int i; | |
1310 | ||
1311 | iba[0].address = (u32)(addr_t)skb->data; | |
1312 | iba[0].length = (u32)skb_headlen(skb); | |
1313 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1314 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1315 | ||
1316 | iba[i + 1].address = | |
1317 | (u32)(addr_t)skb_frag_address(frag); | |
1318 | iba[i + 1].length = (u32)skb_frag_size(frag); | |
1319 | } | |
1320 | rc = pr_iucv->message_receive(path, msg, | |
1321 | IUCV_IPBUFLST, | |
1322 | (void *)iba, len, NULL); | |
1323 | } else { | |
1324 | rc = pr_iucv->message_receive(path, msg, | |
6fcd61f7 FB |
1325 | msg->flags & IUCV_IPRMDATA, |
1326 | skb->data, len, NULL); | |
a006353a | 1327 | } |
f0703c80 UB |
1328 | if (rc) { |
1329 | kfree_skb(skb); | |
1330 | return; | |
1331 | } | |
a006353a | 1332 | WARN_ON_ONCE(skb->len != len); |
f0703c80 UB |
1333 | } |
1334 | ||
f9c41a62 | 1335 | IUCV_SKB_CB(skb)->offset = 0; |
8c68b1a0 UB |
1336 | if (sk_filter(sk, skb)) { |
1337 | atomic_inc(&sk->sk_drops); /* skb rejected by filter */ | |
1338 | kfree_skb(skb); | |
1339 | return; | |
1340 | } | |
1341 | if (__sock_queue_rcv_skb(sk, skb)) /* handle rcv queue full */ | |
1342 | skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, skb); | |
f0703c80 UB |
1343 | } |
1344 | ||
bf95d20f HB |
1345 | /* iucv_process_message_q() - Process outstanding IUCV messages |
1346 | * | |
1347 | * Locking: must be called with message_q.lock held | |
1348 | */ | |
f0703c80 UB |
1349 | static void iucv_process_message_q(struct sock *sk) |
1350 | { | |
1351 | struct iucv_sock *iucv = iucv_sk(sk); | |
1352 | struct sk_buff *skb; | |
1353 | struct sock_msg_q *p, *n; | |
1354 | ||
1355 | list_for_each_entry_safe(p, n, &iucv->message_q.list, list) { | |
a006353a | 1356 | skb = alloc_iucv_recv_skb(iucv_msg_length(&p->msg)); |
f0703c80 UB |
1357 | if (!skb) |
1358 | break; | |
1359 | iucv_process_message(sk, skb, p->path, &p->msg); | |
1360 | list_del(&p->list); | |
1361 | kfree(p); | |
1362 | if (!skb_queue_empty(&iucv->backlog_skb_q)) | |
1363 | break; | |
1364 | } | |
1365 | } | |
1366 | ||
1b784140 YX |
1367 | static int iucv_sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1368 | size_t len, int flags) | |
eac3731b JH |
1369 | { |
1370 | int noblock = flags & MSG_DONTWAIT; | |
1371 | struct sock *sk = sock->sk; | |
561e0360 | 1372 | struct iucv_sock *iucv = iucv_sk(sk); |
aa8e71f5 | 1373 | unsigned int copied, rlen; |
9fbd87d4 | 1374 | struct sk_buff *skb, *rskb, *cskb; |
eac3731b | 1375 | int err = 0; |
f9c41a62 | 1376 | u32 offset; |
eac3731b | 1377 | |
aac6399c | 1378 | if ((sk->sk_state == IUCV_DISCONN) && |
f0703c80 UB |
1379 | skb_queue_empty(&iucv->backlog_skb_q) && |
1380 | skb_queue_empty(&sk->sk_receive_queue) && | |
1381 | list_empty(&iucv->message_q.list)) | |
561e0360 JH |
1382 | return 0; |
1383 | ||
eac3731b JH |
1384 | if (flags & (MSG_OOB)) |
1385 | return -EOPNOTSUPP; | |
1386 | ||
60d3705f HB |
1387 | /* receive/dequeue next skb: |
1388 | * the function understands MSG_PEEK and, thus, does not dequeue skb */ | |
eac3731b JH |
1389 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
1390 | if (!skb) { | |
1391 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
1392 | return 0; | |
1393 | return err; | |
1394 | } | |
1395 | ||
f9c41a62 UB |
1396 | offset = IUCV_SKB_CB(skb)->offset; |
1397 | rlen = skb->len - offset; /* real length of skb */ | |
aa8e71f5 | 1398 | copied = min_t(unsigned int, rlen, len); |
82492a35 UB |
1399 | if (!rlen) |
1400 | sk->sk_shutdown = sk->sk_shutdown | RCV_SHUTDOWN; | |
eac3731b | 1401 | |
561e0360 | 1402 | cskb = skb; |
51f3d02b | 1403 | if (skb_copy_datagram_msg(cskb, offset, msg, copied)) { |
802788bf HB |
1404 | if (!(flags & MSG_PEEK)) |
1405 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1406 | return -EFAULT; | |
eac3731b JH |
1407 | } |
1408 | ||
aa8e71f5 HB |
1409 | /* SOCK_SEQPACKET: set MSG_TRUNC if recv buf size is too small */ |
1410 | if (sk->sk_type == SOCK_SEQPACKET) { | |
1411 | if (copied < rlen) | |
1412 | msg->msg_flags |= MSG_TRUNC; | |
1413 | /* each iucv message contains a complete record */ | |
1414 | msg->msg_flags |= MSG_EOR; | |
1415 | } | |
eac3731b | 1416 | |
44b1e6b5 HB |
1417 | /* create control message to store iucv msg target class: |
1418 | * get the trgcls from the control buffer of the skb due to | |
1419 | * fragmentation of original iucv message. */ | |
1420 | err = put_cmsg(msg, SOL_IUCV, SCM_IUCV_TRGCLS, | |
f9c41a62 UB |
1421 | sizeof(IUCV_SKB_CB(skb)->class), |
1422 | (void *)&IUCV_SKB_CB(skb)->class); | |
44b1e6b5 HB |
1423 | if (err) { |
1424 | if (!(flags & MSG_PEEK)) | |
1425 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1426 | return err; | |
1427 | } | |
1428 | ||
eac3731b JH |
1429 | /* Mark read part of skb as used */ |
1430 | if (!(flags & MSG_PEEK)) { | |
eac3731b | 1431 | |
aa8e71f5 HB |
1432 | /* SOCK_STREAM: re-queue skb if it contains unreceived data */ |
1433 | if (sk->sk_type == SOCK_STREAM) { | |
f9c41a62 UB |
1434 | if (copied < rlen) { |
1435 | IUCV_SKB_CB(skb)->offset = offset + copied; | |
2f139a5d | 1436 | skb_queue_head(&sk->sk_receive_queue, skb); |
aa8e71f5 HB |
1437 | goto done; |
1438 | } | |
eac3731b JH |
1439 | } |
1440 | ||
1441 | kfree_skb(skb); | |
800c5eb7 UB |
1442 | if (iucv->transport == AF_IUCV_TRANS_HIPER) { |
1443 | atomic_inc(&iucv->msg_recv); | |
1444 | if (atomic_read(&iucv->msg_recv) > iucv->msglimit) { | |
1445 | WARN_ON(1); | |
1446 | iucv_sock_close(sk); | |
1447 | return -EFAULT; | |
1448 | } | |
1449 | } | |
561e0360 JH |
1450 | |
1451 | /* Queue backlog skbs */ | |
bf95d20f | 1452 | spin_lock_bh(&iucv->message_q.lock); |
f0703c80 | 1453 | rskb = skb_dequeue(&iucv->backlog_skb_q); |
da99f056 | 1454 | while (rskb) { |
f9c41a62 | 1455 | IUCV_SKB_CB(rskb)->offset = 0; |
8c68b1a0 UB |
1456 | if (__sock_queue_rcv_skb(sk, rskb)) { |
1457 | /* handle rcv queue full */ | |
f0703c80 | 1458 | skb_queue_head(&iucv->backlog_skb_q, |
561e0360 JH |
1459 | rskb); |
1460 | break; | |
561e0360 | 1461 | } |
8c68b1a0 | 1462 | rskb = skb_dequeue(&iucv->backlog_skb_q); |
561e0360 | 1463 | } |
f0703c80 | 1464 | if (skb_queue_empty(&iucv->backlog_skb_q)) { |
f0703c80 UB |
1465 | if (!list_empty(&iucv->message_q.list)) |
1466 | iucv_process_message_q(sk); | |
3881ac44 UB |
1467 | if (atomic_read(&iucv->msg_recv) >= |
1468 | iucv->msglimit / 2) { | |
9fbd87d4 | 1469 | err = iucv_send_ctrl(sk, AF_IUCV_FLAG_WIN); |
3881ac44 UB |
1470 | if (err) { |
1471 | sk->sk_state = IUCV_DISCONN; | |
1472 | sk->sk_state_change(sk); | |
1473 | } | |
1474 | } | |
f0703c80 | 1475 | } |
bf95d20f | 1476 | spin_unlock_bh(&iucv->message_q.lock); |
60d3705f | 1477 | } |
eac3731b JH |
1478 | |
1479 | done: | |
aa8e71f5 HB |
1480 | /* SOCK_SEQPACKET: return real length if MSG_TRUNC is set */ |
1481 | if (sk->sk_type == SOCK_SEQPACKET && (flags & MSG_TRUNC)) | |
1482 | copied = rlen; | |
1483 | ||
1484 | return copied; | |
eac3731b JH |
1485 | } |
1486 | ||
ade994f4 | 1487 | static inline __poll_t iucv_accept_poll(struct sock *parent) |
eac3731b JH |
1488 | { |
1489 | struct iucv_sock *isk, *n; | |
1490 | struct sock *sk; | |
1491 | ||
da99f056 | 1492 | list_for_each_entry_safe(isk, n, &iucv_sk(parent)->accept_q, accept_q) { |
eac3731b JH |
1493 | sk = (struct sock *) isk; |
1494 | ||
1495 | if (sk->sk_state == IUCV_CONNECTED) | |
a9a08845 | 1496 | return EPOLLIN | EPOLLRDNORM; |
eac3731b JH |
1497 | } |
1498 | ||
1499 | return 0; | |
1500 | } | |
1501 | ||
a11e1d43 LT |
1502 | __poll_t iucv_sock_poll(struct file *file, struct socket *sock, |
1503 | poll_table *wait) | |
eac3731b JH |
1504 | { |
1505 | struct sock *sk = sock->sk; | |
ade994f4 | 1506 | __poll_t mask = 0; |
eac3731b | 1507 | |
89ab066d | 1508 | sock_poll_wait(file, sock, wait); |
a11e1d43 | 1509 | |
eac3731b JH |
1510 | if (sk->sk_state == IUCV_LISTEN) |
1511 | return iucv_accept_poll(sk); | |
1512 | ||
1513 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
a9a08845 LT |
1514 | mask |= EPOLLERR | |
1515 | (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0); | |
eac3731b JH |
1516 | |
1517 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
a9a08845 | 1518 | mask |= EPOLLRDHUP; |
eac3731b JH |
1519 | |
1520 | if (sk->sk_shutdown == SHUTDOWN_MASK) | |
a9a08845 | 1521 | mask |= EPOLLHUP; |
eac3731b JH |
1522 | |
1523 | if (!skb_queue_empty(&sk->sk_receive_queue) || | |
da99f056 | 1524 | (sk->sk_shutdown & RCV_SHUTDOWN)) |
a9a08845 | 1525 | mask |= EPOLLIN | EPOLLRDNORM; |
eac3731b JH |
1526 | |
1527 | if (sk->sk_state == IUCV_CLOSED) | |
a9a08845 | 1528 | mask |= EPOLLHUP; |
eac3731b | 1529 | |
aac6399c | 1530 | if (sk->sk_state == IUCV_DISCONN) |
a9a08845 | 1531 | mask |= EPOLLIN; |
561e0360 | 1532 | |
7f1b0ea4 | 1533 | if (sock_writeable(sk) && iucv_below_msglim(sk)) |
a9a08845 | 1534 | mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND; |
eac3731b | 1535 | else |
9cd3e072 | 1536 | sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk); |
eac3731b JH |
1537 | |
1538 | return mask; | |
1539 | } | |
1540 | ||
1541 | static int iucv_sock_shutdown(struct socket *sock, int how) | |
1542 | { | |
1543 | struct sock *sk = sock->sk; | |
1544 | struct iucv_sock *iucv = iucv_sk(sk); | |
1545 | struct iucv_message txmsg; | |
1546 | int err = 0; | |
eac3731b JH |
1547 | |
1548 | how++; | |
1549 | ||
1550 | if ((how & ~SHUTDOWN_MASK) || !how) | |
1551 | return -EINVAL; | |
1552 | ||
1553 | lock_sock(sk); | |
da99f056 | 1554 | switch (sk->sk_state) { |
82492a35 | 1555 | case IUCV_LISTEN: |
e14ad5fa HB |
1556 | case IUCV_DISCONN: |
1557 | case IUCV_CLOSING: | |
eac3731b JH |
1558 | case IUCV_CLOSED: |
1559 | err = -ENOTCONN; | |
1560 | goto fail; | |
eac3731b | 1561 | default: |
eac3731b JH |
1562 | break; |
1563 | } | |
1564 | ||
1565 | if (how == SEND_SHUTDOWN || how == SHUTDOWN_MASK) { | |
82492a35 UB |
1566 | if (iucv->transport == AF_IUCV_TRANS_IUCV) { |
1567 | txmsg.class = 0; | |
1568 | txmsg.tag = 0; | |
1569 | err = pr_iucv->message_send(iucv->path, &txmsg, | |
1570 | IUCV_IPRMDATA, 0, (void *) iprm_shutdown, 8); | |
1571 | if (err) { | |
1572 | switch (err) { | |
1573 | case 1: | |
1574 | err = -ENOTCONN; | |
1575 | break; | |
1576 | case 2: | |
1577 | err = -ECONNRESET; | |
1578 | break; | |
1579 | default: | |
1580 | err = -ENOTCONN; | |
1581 | break; | |
1582 | } | |
eac3731b | 1583 | } |
82492a35 UB |
1584 | } else |
1585 | iucv_send_ctrl(sk, AF_IUCV_FLAG_SHT); | |
eac3731b JH |
1586 | } |
1587 | ||
82492a35 | 1588 | sk->sk_shutdown |= how; |
eac3731b | 1589 | if (how == RCV_SHUTDOWN || how == SHUTDOWN_MASK) { |
1042cab8 UB |
1590 | if ((iucv->transport == AF_IUCV_TRANS_IUCV) && |
1591 | iucv->path) { | |
82492a35 UB |
1592 | err = pr_iucv->path_quiesce(iucv->path, NULL); |
1593 | if (err) | |
1594 | err = -ENOTCONN; | |
1595 | /* skb_queue_purge(&sk->sk_receive_queue); */ | |
1596 | } | |
eac3731b JH |
1597 | skb_queue_purge(&sk->sk_receive_queue); |
1598 | } | |
1599 | ||
1600 | /* Wake up anyone sleeping in poll */ | |
1601 | sk->sk_state_change(sk); | |
1602 | ||
1603 | fail: | |
1604 | release_sock(sk); | |
1605 | return err; | |
1606 | } | |
1607 | ||
1608 | static int iucv_sock_release(struct socket *sock) | |
1609 | { | |
1610 | struct sock *sk = sock->sk; | |
1611 | int err = 0; | |
1612 | ||
1613 | if (!sk) | |
1614 | return 0; | |
1615 | ||
1616 | iucv_sock_close(sk); | |
1617 | ||
eac3731b JH |
1618 | sock_orphan(sk); |
1619 | iucv_sock_kill(sk); | |
1620 | return err; | |
1621 | } | |
1622 | ||
9d5c5d8f HB |
1623 | /* getsockopt and setsockopt */ |
1624 | static int iucv_sock_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 1625 | char __user *optval, unsigned int optlen) |
9d5c5d8f HB |
1626 | { |
1627 | struct sock *sk = sock->sk; | |
1628 | struct iucv_sock *iucv = iucv_sk(sk); | |
1629 | int val; | |
1630 | int rc; | |
1631 | ||
1632 | if (level != SOL_IUCV) | |
1633 | return -ENOPROTOOPT; | |
1634 | ||
1635 | if (optlen < sizeof(int)) | |
1636 | return -EINVAL; | |
1637 | ||
1638 | if (get_user(val, (int __user *) optval)) | |
1639 | return -EFAULT; | |
1640 | ||
1641 | rc = 0; | |
1642 | ||
1643 | lock_sock(sk); | |
1644 | switch (optname) { | |
1645 | case SO_IPRMDATA_MSG: | |
1646 | if (val) | |
1647 | iucv->flags |= IUCV_IPRMDATA; | |
1648 | else | |
1649 | iucv->flags &= ~IUCV_IPRMDATA; | |
1650 | break; | |
09488e2e HB |
1651 | case SO_MSGLIMIT: |
1652 | switch (sk->sk_state) { | |
1653 | case IUCV_OPEN: | |
1654 | case IUCV_BOUND: | |
1655 | if (val < 1 || val > (u16)(~0)) | |
1656 | rc = -EINVAL; | |
1657 | else | |
1658 | iucv->msglimit = val; | |
1659 | break; | |
1660 | default: | |
1661 | rc = -EINVAL; | |
1662 | break; | |
1663 | } | |
1664 | break; | |
9d5c5d8f HB |
1665 | default: |
1666 | rc = -ENOPROTOOPT; | |
1667 | break; | |
1668 | } | |
1669 | release_sock(sk); | |
1670 | ||
1671 | return rc; | |
1672 | } | |
1673 | ||
1674 | static int iucv_sock_getsockopt(struct socket *sock, int level, int optname, | |
1675 | char __user *optval, int __user *optlen) | |
1676 | { | |
1677 | struct sock *sk = sock->sk; | |
1678 | struct iucv_sock *iucv = iucv_sk(sk); | |
51363b87 UB |
1679 | unsigned int val; |
1680 | int len; | |
9d5c5d8f HB |
1681 | |
1682 | if (level != SOL_IUCV) | |
1683 | return -ENOPROTOOPT; | |
1684 | ||
1685 | if (get_user(len, optlen)) | |
1686 | return -EFAULT; | |
1687 | ||
1688 | if (len < 0) | |
1689 | return -EINVAL; | |
1690 | ||
1691 | len = min_t(unsigned int, len, sizeof(int)); | |
1692 | ||
1693 | switch (optname) { | |
1694 | case SO_IPRMDATA_MSG: | |
1695 | val = (iucv->flags & IUCV_IPRMDATA) ? 1 : 0; | |
1696 | break; | |
09488e2e HB |
1697 | case SO_MSGLIMIT: |
1698 | lock_sock(sk); | |
1699 | val = (iucv->path != NULL) ? iucv->path->msglim /* connected */ | |
1700 | : iucv->msglimit; /* default */ | |
1701 | release_sock(sk); | |
1702 | break; | |
51363b87 UB |
1703 | case SO_MSGSIZE: |
1704 | if (sk->sk_state == IUCV_OPEN) | |
1705 | return -EBADFD; | |
1706 | val = (iucv->hs_dev) ? iucv->hs_dev->mtu - | |
1707 | sizeof(struct af_iucv_trans_hdr) - ETH_HLEN : | |
1708 | 0x7fffffff; | |
1709 | break; | |
9d5c5d8f HB |
1710 | default: |
1711 | return -ENOPROTOOPT; | |
1712 | } | |
1713 | ||
1714 | if (put_user(len, optlen)) | |
1715 | return -EFAULT; | |
1716 | if (copy_to_user(optval, &val, len)) | |
1717 | return -EFAULT; | |
1718 | ||
1719 | return 0; | |
1720 | } | |
1721 | ||
1722 | ||
eac3731b JH |
1723 | /* Callback wrappers - called from iucv base support */ |
1724 | static int iucv_callback_connreq(struct iucv_path *path, | |
1725 | u8 ipvmid[8], u8 ipuser[16]) | |
1726 | { | |
1727 | unsigned char user_data[16]; | |
1728 | unsigned char nuser_data[16]; | |
1729 | unsigned char src_name[8]; | |
eac3731b JH |
1730 | struct sock *sk, *nsk; |
1731 | struct iucv_sock *iucv, *niucv; | |
1732 | int err; | |
1733 | ||
1734 | memcpy(src_name, ipuser, 8); | |
1735 | EBCASC(src_name, 8); | |
1736 | /* Find out if this path belongs to af_iucv. */ | |
1737 | read_lock(&iucv_sk_list.lock); | |
1738 | iucv = NULL; | |
febca281 | 1739 | sk = NULL; |
b67bfe0d | 1740 | sk_for_each(sk, &iucv_sk_list.head) |
eac3731b JH |
1741 | if (sk->sk_state == IUCV_LISTEN && |
1742 | !memcmp(&iucv_sk(sk)->src_name, src_name, 8)) { | |
1743 | /* | |
1744 | * Found a listening socket with | |
1745 | * src_name == ipuser[0-7]. | |
1746 | */ | |
1747 | iucv = iucv_sk(sk); | |
1748 | break; | |
1749 | } | |
1750 | read_unlock(&iucv_sk_list.lock); | |
1751 | if (!iucv) | |
1752 | /* No socket found, not one of our paths. */ | |
1753 | return -EINVAL; | |
1754 | ||
1755 | bh_lock_sock(sk); | |
1756 | ||
1757 | /* Check if parent socket is listening */ | |
1758 | low_nmcpy(user_data, iucv->src_name); | |
1759 | high_nmcpy(user_data, iucv->dst_name); | |
1760 | ASCEBC(user_data, sizeof(user_data)); | |
1761 | if (sk->sk_state != IUCV_LISTEN) { | |
6fcd61f7 | 1762 | err = pr_iucv->path_sever(path, user_data); |
65dbd7c2 | 1763 | iucv_path_free(path); |
eac3731b JH |
1764 | goto fail; |
1765 | } | |
1766 | ||
1767 | /* Check for backlog size */ | |
1768 | if (sk_acceptq_is_full(sk)) { | |
6fcd61f7 | 1769 | err = pr_iucv->path_sever(path, user_data); |
65dbd7c2 | 1770 | iucv_path_free(path); |
eac3731b JH |
1771 | goto fail; |
1772 | } | |
1773 | ||
1774 | /* Create the new socket */ | |
11aa9c28 | 1775 | nsk = iucv_sock_alloc(NULL, sk->sk_type, GFP_ATOMIC, 0); |
da99f056 | 1776 | if (!nsk) { |
6fcd61f7 | 1777 | err = pr_iucv->path_sever(path, user_data); |
65dbd7c2 | 1778 | iucv_path_free(path); |
eac3731b JH |
1779 | goto fail; |
1780 | } | |
1781 | ||
1782 | niucv = iucv_sk(nsk); | |
1783 | iucv_sock_init(nsk, sk); | |
1784 | ||
1785 | /* Set the new iucv_sock */ | |
1786 | memcpy(niucv->dst_name, ipuser + 8, 8); | |
1787 | EBCASC(niucv->dst_name, 8); | |
1788 | memcpy(niucv->dst_user_id, ipvmid, 8); | |
1789 | memcpy(niucv->src_name, iucv->src_name, 8); | |
1790 | memcpy(niucv->src_user_id, iucv->src_user_id, 8); | |
1791 | niucv->path = path; | |
1792 | ||
1793 | /* Call iucv_accept */ | |
1794 | high_nmcpy(nuser_data, ipuser + 8); | |
1795 | memcpy(nuser_data + 8, niucv->src_name, 8); | |
1796 | ASCEBC(nuser_data + 8, 8); | |
1797 | ||
09488e2e HB |
1798 | /* set message limit for path based on msglimit of accepting socket */ |
1799 | niucv->msglimit = iucv->msglimit; | |
1800 | path->msglim = iucv->msglimit; | |
6fcd61f7 | 1801 | err = pr_iucv->path_accept(path, &af_iucv_handler, nuser_data, nsk); |
da99f056 | 1802 | if (err) { |
7d316b94 | 1803 | iucv_sever_path(nsk, 1); |
65dbd7c2 | 1804 | iucv_sock_kill(nsk); |
eac3731b JH |
1805 | goto fail; |
1806 | } | |
1807 | ||
1808 | iucv_accept_enqueue(sk, nsk); | |
1809 | ||
1810 | /* Wake up accept */ | |
1811 | nsk->sk_state = IUCV_CONNECTED; | |
676d2369 | 1812 | sk->sk_data_ready(sk); |
eac3731b JH |
1813 | err = 0; |
1814 | fail: | |
1815 | bh_unlock_sock(sk); | |
1816 | return 0; | |
1817 | } | |
1818 | ||
1819 | static void iucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) | |
1820 | { | |
1821 | struct sock *sk = path->private; | |
1822 | ||
1823 | sk->sk_state = IUCV_CONNECTED; | |
1824 | sk->sk_state_change(sk); | |
1825 | } | |
1826 | ||
1827 | static void iucv_callback_rx(struct iucv_path *path, struct iucv_message *msg) | |
1828 | { | |
1829 | struct sock *sk = path->private; | |
561e0360 | 1830 | struct iucv_sock *iucv = iucv_sk(sk); |
f0703c80 UB |
1831 | struct sk_buff *skb; |
1832 | struct sock_msg_q *save_msg; | |
1833 | int len; | |
561e0360 | 1834 | |
fe86e54e | 1835 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
6fcd61f7 | 1836 | pr_iucv->message_reject(path, msg); |
eac3731b | 1837 | return; |
fe86e54e | 1838 | } |
eac3731b | 1839 | |
3fa6b5ad | 1840 | spin_lock(&iucv->message_q.lock); |
eac3731b | 1841 | |
f0703c80 UB |
1842 | if (!list_empty(&iucv->message_q.list) || |
1843 | !skb_queue_empty(&iucv->backlog_skb_q)) | |
1844 | goto save_message; | |
1845 | ||
1846 | len = atomic_read(&sk->sk_rmem_alloc); | |
87fb4b7b | 1847 | len += SKB_TRUESIZE(iucv_msg_length(msg)); |
f0703c80 UB |
1848 | if (len > sk->sk_rcvbuf) |
1849 | goto save_message; | |
1850 | ||
a006353a | 1851 | skb = alloc_iucv_recv_skb(iucv_msg_length(msg)); |
f0703c80 UB |
1852 | if (!skb) |
1853 | goto save_message; | |
eac3731b | 1854 | |
f0703c80 | 1855 | iucv_process_message(sk, skb, path, msg); |
3fa6b5ad | 1856 | goto out_unlock; |
eac3731b | 1857 | |
f0703c80 UB |
1858 | save_message: |
1859 | save_msg = kzalloc(sizeof(struct sock_msg_q), GFP_ATOMIC | GFP_DMA); | |
d4444722 | 1860 | if (!save_msg) |
a56635a5 | 1861 | goto out_unlock; |
f0703c80 UB |
1862 | save_msg->path = path; |
1863 | save_msg->msg = *msg; | |
eac3731b | 1864 | |
f0703c80 | 1865 | list_add_tail(&save_msg->list, &iucv->message_q.list); |
3fa6b5ad HB |
1866 | |
1867 | out_unlock: | |
f0703c80 | 1868 | spin_unlock(&iucv->message_q.lock); |
eac3731b JH |
1869 | } |
1870 | ||
1871 | static void iucv_callback_txdone(struct iucv_path *path, | |
1872 | struct iucv_message *msg) | |
1873 | { | |
1874 | struct sock *sk = path->private; | |
f2a77991 | 1875 | struct sk_buff *this = NULL; |
eac3731b | 1876 | struct sk_buff_head *list = &iucv_sk(sk)->send_skb_q; |
9e733177 | 1877 | struct sk_buff *list_skb; |
eac3731b JH |
1878 | unsigned long flags; |
1879 | ||
7d316b94 | 1880 | bh_lock_sock(sk); |
561e0360 | 1881 | |
9e733177 DM |
1882 | spin_lock_irqsave(&list->lock, flags); |
1883 | skb_queue_walk(list, list_skb) { | |
1884 | if (msg->tag == IUCV_SKB_CB(list_skb)->tag) { | |
1885 | this = list_skb; | |
1886 | break; | |
f2a77991 | 1887 | } |
9e733177 DM |
1888 | } |
1889 | if (this) | |
1890 | __skb_unlink(this, list); | |
1891 | spin_unlock_irqrestore(&list->lock, flags); | |
eac3731b | 1892 | |
9e733177 DM |
1893 | if (this) { |
1894 | kfree_skb(this); | |
1895 | /* wake up any process waiting for sending */ | |
1896 | iucv_sock_wake_msglim(sk); | |
561e0360 | 1897 | } |
eac3731b | 1898 | |
da99f056 | 1899 | if (sk->sk_state == IUCV_CLOSING) { |
561e0360 JH |
1900 | if (skb_queue_empty(&iucv_sk(sk)->send_skb_q)) { |
1901 | sk->sk_state = IUCV_CLOSED; | |
1902 | sk->sk_state_change(sk); | |
1903 | } | |
1904 | } | |
7d316b94 | 1905 | bh_unlock_sock(sk); |
eac3731b | 1906 | |
eac3731b JH |
1907 | } |
1908 | ||
1909 | static void iucv_callback_connrej(struct iucv_path *path, u8 ipuser[16]) | |
1910 | { | |
1911 | struct sock *sk = path->private; | |
1912 | ||
7d316b94 UB |
1913 | if (sk->sk_state == IUCV_CLOSED) |
1914 | return; | |
1915 | ||
1916 | bh_lock_sock(sk); | |
1917 | iucv_sever_path(sk, 1); | |
aac6399c | 1918 | sk->sk_state = IUCV_DISCONN; |
eac3731b JH |
1919 | |
1920 | sk->sk_state_change(sk); | |
7d316b94 | 1921 | bh_unlock_sock(sk); |
eac3731b JH |
1922 | } |
1923 | ||
af88b52d HB |
1924 | /* called if the other communication side shuts down its RECV direction; |
1925 | * in turn, the callback sets SEND_SHUTDOWN to disable sending of data. | |
1926 | */ | |
1927 | static void iucv_callback_shutdown(struct iucv_path *path, u8 ipuser[16]) | |
1928 | { | |
1929 | struct sock *sk = path->private; | |
1930 | ||
1931 | bh_lock_sock(sk); | |
1932 | if (sk->sk_state != IUCV_CLOSED) { | |
1933 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
1934 | sk->sk_state_change(sk); | |
1935 | } | |
1936 | bh_unlock_sock(sk); | |
1937 | } | |
1938 | ||
3881ac44 UB |
1939 | /***************** HiperSockets transport callbacks ********************/ |
1940 | static void afiucv_swap_src_dest(struct sk_buff *skb) | |
1941 | { | |
cd11d112 | 1942 | struct af_iucv_trans_hdr *trans_hdr = iucv_trans_hdr(skb); |
3881ac44 UB |
1943 | char tmpID[8]; |
1944 | char tmpName[8]; | |
1945 | ||
1946 | ASCEBC(trans_hdr->destUserID, sizeof(trans_hdr->destUserID)); | |
1947 | ASCEBC(trans_hdr->destAppName, sizeof(trans_hdr->destAppName)); | |
1948 | ASCEBC(trans_hdr->srcUserID, sizeof(trans_hdr->srcUserID)); | |
1949 | ASCEBC(trans_hdr->srcAppName, sizeof(trans_hdr->srcAppName)); | |
1950 | memcpy(tmpID, trans_hdr->srcUserID, 8); | |
1951 | memcpy(tmpName, trans_hdr->srcAppName, 8); | |
1952 | memcpy(trans_hdr->srcUserID, trans_hdr->destUserID, 8); | |
1953 | memcpy(trans_hdr->srcAppName, trans_hdr->destAppName, 8); | |
1954 | memcpy(trans_hdr->destUserID, tmpID, 8); | |
1955 | memcpy(trans_hdr->destAppName, tmpName, 8); | |
1956 | skb_push(skb, ETH_HLEN); | |
1957 | memset(skb->data, 0, ETH_HLEN); | |
1958 | } | |
1959 | ||
1960 | /** | |
1961 | * afiucv_hs_callback_syn - react on received SYN | |
1962 | **/ | |
1963 | static int afiucv_hs_callback_syn(struct sock *sk, struct sk_buff *skb) | |
1964 | { | |
cd11d112 | 1965 | struct af_iucv_trans_hdr *trans_hdr = iucv_trans_hdr(skb); |
3881ac44 UB |
1966 | struct sock *nsk; |
1967 | struct iucv_sock *iucv, *niucv; | |
3881ac44 UB |
1968 | int err; |
1969 | ||
1970 | iucv = iucv_sk(sk); | |
3881ac44 UB |
1971 | if (!iucv) { |
1972 | /* no sock - connection refused */ | |
1973 | afiucv_swap_src_dest(skb); | |
1974 | trans_hdr->flags = AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_FIN; | |
1975 | err = dev_queue_xmit(skb); | |
1976 | goto out; | |
1977 | } | |
1978 | ||
11aa9c28 | 1979 | nsk = iucv_sock_alloc(NULL, sk->sk_type, GFP_ATOMIC, 0); |
3881ac44 UB |
1980 | bh_lock_sock(sk); |
1981 | if ((sk->sk_state != IUCV_LISTEN) || | |
1982 | sk_acceptq_is_full(sk) || | |
1983 | !nsk) { | |
1984 | /* error on server socket - connection refused */ | |
3881ac44 UB |
1985 | afiucv_swap_src_dest(skb); |
1986 | trans_hdr->flags = AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_FIN; | |
1987 | err = dev_queue_xmit(skb); | |
4d520f62 | 1988 | iucv_sock_kill(nsk); |
3881ac44 UB |
1989 | bh_unlock_sock(sk); |
1990 | goto out; | |
1991 | } | |
1992 | ||
1993 | niucv = iucv_sk(nsk); | |
1994 | iucv_sock_init(nsk, sk); | |
1995 | niucv->transport = AF_IUCV_TRANS_HIPER; | |
1996 | niucv->msglimit = iucv->msglimit; | |
1997 | if (!trans_hdr->window) | |
1998 | niucv->msglimit_peer = IUCV_HIPER_MSGLIM_DEFAULT; | |
1999 | else | |
2000 | niucv->msglimit_peer = trans_hdr->window; | |
2001 | memcpy(niucv->dst_name, trans_hdr->srcAppName, 8); | |
2002 | memcpy(niucv->dst_user_id, trans_hdr->srcUserID, 8); | |
2003 | memcpy(niucv->src_name, iucv->src_name, 8); | |
2004 | memcpy(niucv->src_user_id, iucv->src_user_id, 8); | |
2005 | nsk->sk_bound_dev_if = sk->sk_bound_dev_if; | |
800c5eb7 UB |
2006 | niucv->hs_dev = iucv->hs_dev; |
2007 | dev_hold(niucv->hs_dev); | |
3881ac44 UB |
2008 | afiucv_swap_src_dest(skb); |
2009 | trans_hdr->flags = AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_ACK; | |
2010 | trans_hdr->window = niucv->msglimit; | |
2011 | /* if receiver acks the xmit connection is established */ | |
2012 | err = dev_queue_xmit(skb); | |
2013 | if (!err) { | |
2014 | iucv_accept_enqueue(sk, nsk); | |
2015 | nsk->sk_state = IUCV_CONNECTED; | |
676d2369 | 2016 | sk->sk_data_ready(sk); |
3881ac44 UB |
2017 | } else |
2018 | iucv_sock_kill(nsk); | |
2019 | bh_unlock_sock(sk); | |
2020 | ||
2021 | out: | |
2022 | return NET_RX_SUCCESS; | |
2023 | } | |
2024 | ||
2025 | /** | |
2026 | * afiucv_hs_callback_synack() - react on received SYN-ACK | |
2027 | **/ | |
2028 | static int afiucv_hs_callback_synack(struct sock *sk, struct sk_buff *skb) | |
2029 | { | |
2030 | struct iucv_sock *iucv = iucv_sk(sk); | |
3881ac44 UB |
2031 | |
2032 | if (!iucv) | |
2033 | goto out; | |
2034 | if (sk->sk_state != IUCV_BOUND) | |
2035 | goto out; | |
2036 | bh_lock_sock(sk); | |
cd11d112 | 2037 | iucv->msglimit_peer = iucv_trans_hdr(skb)->window; |
3881ac44 UB |
2038 | sk->sk_state = IUCV_CONNECTED; |
2039 | sk->sk_state_change(sk); | |
2040 | bh_unlock_sock(sk); | |
2041 | out: | |
2042 | kfree_skb(skb); | |
2043 | return NET_RX_SUCCESS; | |
2044 | } | |
2045 | ||
2046 | /** | |
2047 | * afiucv_hs_callback_synfin() - react on received SYN_FIN | |
2048 | **/ | |
2049 | static int afiucv_hs_callback_synfin(struct sock *sk, struct sk_buff *skb) | |
2050 | { | |
2051 | struct iucv_sock *iucv = iucv_sk(sk); | |
2052 | ||
2053 | if (!iucv) | |
2054 | goto out; | |
2055 | if (sk->sk_state != IUCV_BOUND) | |
2056 | goto out; | |
2057 | bh_lock_sock(sk); | |
2058 | sk->sk_state = IUCV_DISCONN; | |
2059 | sk->sk_state_change(sk); | |
2060 | bh_unlock_sock(sk); | |
2061 | out: | |
2062 | kfree_skb(skb); | |
2063 | return NET_RX_SUCCESS; | |
2064 | } | |
2065 | ||
2066 | /** | |
2067 | * afiucv_hs_callback_fin() - react on received FIN | |
2068 | **/ | |
2069 | static int afiucv_hs_callback_fin(struct sock *sk, struct sk_buff *skb) | |
2070 | { | |
2071 | struct iucv_sock *iucv = iucv_sk(sk); | |
2072 | ||
2073 | /* other end of connection closed */ | |
800c5eb7 UB |
2074 | if (!iucv) |
2075 | goto out; | |
2076 | bh_lock_sock(sk); | |
2077 | if (sk->sk_state == IUCV_CONNECTED) { | |
aac6399c | 2078 | sk->sk_state = IUCV_DISCONN; |
3881ac44 | 2079 | sk->sk_state_change(sk); |
3881ac44 | 2080 | } |
800c5eb7 UB |
2081 | bh_unlock_sock(sk); |
2082 | out: | |
3881ac44 UB |
2083 | kfree_skb(skb); |
2084 | return NET_RX_SUCCESS; | |
2085 | } | |
2086 | ||
2087 | /** | |
2088 | * afiucv_hs_callback_win() - react on received WIN | |
2089 | **/ | |
2090 | static int afiucv_hs_callback_win(struct sock *sk, struct sk_buff *skb) | |
2091 | { | |
2092 | struct iucv_sock *iucv = iucv_sk(sk); | |
3881ac44 UB |
2093 | |
2094 | if (!iucv) | |
2095 | return NET_RX_SUCCESS; | |
2096 | ||
2097 | if (sk->sk_state != IUCV_CONNECTED) | |
2098 | return NET_RX_SUCCESS; | |
2099 | ||
cd11d112 | 2100 | atomic_sub(iucv_trans_hdr(skb)->window, &iucv->msg_sent); |
3881ac44 UB |
2101 | iucv_sock_wake_msglim(sk); |
2102 | return NET_RX_SUCCESS; | |
2103 | } | |
2104 | ||
2105 | /** | |
2106 | * afiucv_hs_callback_rx() - react on received data | |
2107 | **/ | |
2108 | static int afiucv_hs_callback_rx(struct sock *sk, struct sk_buff *skb) | |
2109 | { | |
2110 | struct iucv_sock *iucv = iucv_sk(sk); | |
2111 | ||
2112 | if (!iucv) { | |
2113 | kfree_skb(skb); | |
2114 | return NET_RX_SUCCESS; | |
2115 | } | |
2116 | ||
2117 | if (sk->sk_state != IUCV_CONNECTED) { | |
2118 | kfree_skb(skb); | |
2119 | return NET_RX_SUCCESS; | |
2120 | } | |
2121 | ||
82492a35 UB |
2122 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
2123 | kfree_skb(skb); | |
2124 | return NET_RX_SUCCESS; | |
2125 | } | |
2126 | ||
979f66b3 | 2127 | /* write stuff from iucv_msg to skb cb */ |
3881ac44 UB |
2128 | skb_pull(skb, sizeof(struct af_iucv_trans_hdr)); |
2129 | skb_reset_transport_header(skb); | |
2130 | skb_reset_network_header(skb); | |
f9c41a62 | 2131 | IUCV_SKB_CB(skb)->offset = 0; |
8c68b1a0 UB |
2132 | if (sk_filter(sk, skb)) { |
2133 | atomic_inc(&sk->sk_drops); /* skb rejected by filter */ | |
2134 | kfree_skb(skb); | |
2135 | return NET_RX_SUCCESS; | |
2136 | } | |
2137 | ||
3881ac44 UB |
2138 | spin_lock(&iucv->message_q.lock); |
2139 | if (skb_queue_empty(&iucv->backlog_skb_q)) { | |
8c68b1a0 | 2140 | if (__sock_queue_rcv_skb(sk, skb)) |
3881ac44 UB |
2141 | /* handle rcv queue full */ |
2142 | skb_queue_tail(&iucv->backlog_skb_q, skb); | |
3881ac44 UB |
2143 | } else |
2144 | skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, skb); | |
2145 | spin_unlock(&iucv->message_q.lock); | |
2146 | return NET_RX_SUCCESS; | |
2147 | } | |
2148 | ||
2149 | /** | |
2150 | * afiucv_hs_rcv() - base function for arriving data through HiperSockets | |
2151 | * transport | |
2152 | * called from netif RX softirq | |
2153 | **/ | |
2154 | static int afiucv_hs_rcv(struct sk_buff *skb, struct net_device *dev, | |
2155 | struct packet_type *pt, struct net_device *orig_dev) | |
2156 | { | |
3881ac44 UB |
2157 | struct sock *sk; |
2158 | struct iucv_sock *iucv; | |
2159 | struct af_iucv_trans_hdr *trans_hdr; | |
22244099 | 2160 | int err = NET_RX_SUCCESS; |
3881ac44 | 2161 | char nullstring[8]; |
3881ac44 | 2162 | |
cd11d112 JW |
2163 | if (!pskb_may_pull(skb, sizeof(*trans_hdr))) { |
2164 | WARN_ONCE(1, "AF_IUCV failed to receive skb, len=%u", skb->len); | |
979f66b3 EC |
2165 | kfree_skb(skb); |
2166 | return NET_RX_SUCCESS; | |
2167 | } | |
cd11d112 JW |
2168 | |
2169 | trans_hdr = iucv_trans_hdr(skb); | |
3881ac44 UB |
2170 | EBCASC(trans_hdr->destAppName, sizeof(trans_hdr->destAppName)); |
2171 | EBCASC(trans_hdr->destUserID, sizeof(trans_hdr->destUserID)); | |
2172 | EBCASC(trans_hdr->srcAppName, sizeof(trans_hdr->srcAppName)); | |
2173 | EBCASC(trans_hdr->srcUserID, sizeof(trans_hdr->srcUserID)); | |
2174 | memset(nullstring, 0, sizeof(nullstring)); | |
2175 | iucv = NULL; | |
2176 | sk = NULL; | |
2177 | read_lock(&iucv_sk_list.lock); | |
b67bfe0d | 2178 | sk_for_each(sk, &iucv_sk_list.head) { |
3881ac44 UB |
2179 | if (trans_hdr->flags == AF_IUCV_FLAG_SYN) { |
2180 | if ((!memcmp(&iucv_sk(sk)->src_name, | |
2181 | trans_hdr->destAppName, 8)) && | |
2182 | (!memcmp(&iucv_sk(sk)->src_user_id, | |
2183 | trans_hdr->destUserID, 8)) && | |
2184 | (!memcmp(&iucv_sk(sk)->dst_name, nullstring, 8)) && | |
2185 | (!memcmp(&iucv_sk(sk)->dst_user_id, | |
2186 | nullstring, 8))) { | |
2187 | iucv = iucv_sk(sk); | |
2188 | break; | |
2189 | } | |
2190 | } else { | |
2191 | if ((!memcmp(&iucv_sk(sk)->src_name, | |
2192 | trans_hdr->destAppName, 8)) && | |
2193 | (!memcmp(&iucv_sk(sk)->src_user_id, | |
2194 | trans_hdr->destUserID, 8)) && | |
2195 | (!memcmp(&iucv_sk(sk)->dst_name, | |
2196 | trans_hdr->srcAppName, 8)) && | |
2197 | (!memcmp(&iucv_sk(sk)->dst_user_id, | |
2198 | trans_hdr->srcUserID, 8))) { | |
2199 | iucv = iucv_sk(sk); | |
2200 | break; | |
2201 | } | |
2202 | } | |
2203 | } | |
2204 | read_unlock(&iucv_sk_list.lock); | |
2205 | if (!iucv) | |
2206 | sk = NULL; | |
2207 | ||
2208 | /* no sock | |
2209 | how should we send with no sock | |
2210 | 1) send without sock no send rc checking? | |
2211 | 2) introduce default sock to handle this cases | |
2212 | ||
2213 | SYN -> send SYN|ACK in good case, send SYN|FIN in bad case | |
2214 | data -> send FIN | |
2215 | SYN|ACK, SYN|FIN, FIN -> no action? */ | |
2216 | ||
2217 | switch (trans_hdr->flags) { | |
2218 | case AF_IUCV_FLAG_SYN: | |
2219 | /* connect request */ | |
2220 | err = afiucv_hs_callback_syn(sk, skb); | |
2221 | break; | |
2222 | case (AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_ACK): | |
2223 | /* connect request confirmed */ | |
2224 | err = afiucv_hs_callback_synack(sk, skb); | |
2225 | break; | |
2226 | case (AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_FIN): | |
2227 | /* connect request refused */ | |
2228 | err = afiucv_hs_callback_synfin(sk, skb); | |
2229 | break; | |
2230 | case (AF_IUCV_FLAG_FIN): | |
2231 | /* close request */ | |
2232 | err = afiucv_hs_callback_fin(sk, skb); | |
2233 | break; | |
2234 | case (AF_IUCV_FLAG_WIN): | |
2235 | err = afiucv_hs_callback_win(sk, skb); | |
800c5eb7 UB |
2236 | if (skb->len == sizeof(struct af_iucv_trans_hdr)) { |
2237 | kfree_skb(skb); | |
2238 | break; | |
2239 | } | |
82492a35 UB |
2240 | /* fall through and receive non-zero length data */ |
2241 | case (AF_IUCV_FLAG_SHT): | |
2242 | /* shutdown request */ | |
2243 | /* fall through and receive zero length data */ | |
3881ac44 UB |
2244 | case 0: |
2245 | /* plain data frame */ | |
f9c41a62 | 2246 | IUCV_SKB_CB(skb)->class = trans_hdr->iucv_hdr.class; |
3881ac44 UB |
2247 | err = afiucv_hs_callback_rx(sk, skb); |
2248 | break; | |
2249 | default: | |
22244099 | 2250 | kfree_skb(skb); |
3881ac44 UB |
2251 | } |
2252 | ||
2253 | return err; | |
2254 | } | |
2255 | ||
2256 | /** | |
2257 | * afiucv_hs_callback_txnotify() - handle send notifcations from HiperSockets | |
2258 | * transport | |
2259 | **/ | |
2260 | static void afiucv_hs_callback_txnotify(struct sk_buff *skb, | |
2261 | enum iucv_tx_notify n) | |
2262 | { | |
2263 | struct sock *isk = skb->sk; | |
2264 | struct sock *sk = NULL; | |
2265 | struct iucv_sock *iucv = NULL; | |
2266 | struct sk_buff_head *list; | |
2267 | struct sk_buff *list_skb; | |
800c5eb7 | 2268 | struct sk_buff *nskb; |
3881ac44 | 2269 | unsigned long flags; |
3881ac44 | 2270 | |
800c5eb7 | 2271 | read_lock_irqsave(&iucv_sk_list.lock, flags); |
b67bfe0d | 2272 | sk_for_each(sk, &iucv_sk_list.head) |
3881ac44 UB |
2273 | if (sk == isk) { |
2274 | iucv = iucv_sk(sk); | |
2275 | break; | |
2276 | } | |
800c5eb7 | 2277 | read_unlock_irqrestore(&iucv_sk_list.lock, flags); |
3881ac44 | 2278 | |
800c5eb7 | 2279 | if (!iucv || sock_flag(sk, SOCK_ZAPPED)) |
3881ac44 UB |
2280 | return; |
2281 | ||
3881ac44 | 2282 | list = &iucv->send_skb_q; |
800c5eb7 | 2283 | spin_lock_irqsave(&list->lock, flags); |
9e733177 | 2284 | skb_queue_walk_safe(list, list_skb, nskb) { |
3881ac44 | 2285 | if (skb_shinfo(list_skb) == skb_shinfo(skb)) { |
3881ac44 UB |
2286 | switch (n) { |
2287 | case TX_NOTIFY_OK: | |
800c5eb7 UB |
2288 | __skb_unlink(list_skb, list); |
2289 | kfree_skb(list_skb); | |
3881ac44 | 2290 | iucv_sock_wake_msglim(sk); |
3881ac44 UB |
2291 | break; |
2292 | case TX_NOTIFY_PENDING: | |
2293 | atomic_inc(&iucv->pendings); | |
2294 | break; | |
2295 | case TX_NOTIFY_DELAYED_OK: | |
800c5eb7 | 2296 | __skb_unlink(list_skb, list); |
3881ac44 UB |
2297 | atomic_dec(&iucv->pendings); |
2298 | if (atomic_read(&iucv->pendings) <= 0) | |
2299 | iucv_sock_wake_msglim(sk); | |
800c5eb7 | 2300 | kfree_skb(list_skb); |
3881ac44 UB |
2301 | break; |
2302 | case TX_NOTIFY_UNREACHABLE: | |
2303 | case TX_NOTIFY_DELAYED_UNREACHABLE: | |
2304 | case TX_NOTIFY_TPQFULL: /* not yet used */ | |
2305 | case TX_NOTIFY_GENERALERROR: | |
2306 | case TX_NOTIFY_DELAYED_GENERALERROR: | |
800c5eb7 UB |
2307 | __skb_unlink(list_skb, list); |
2308 | kfree_skb(list_skb); | |
2309 | if (sk->sk_state == IUCV_CONNECTED) { | |
2310 | sk->sk_state = IUCV_DISCONN; | |
2311 | sk->sk_state_change(sk); | |
2312 | } | |
3881ac44 UB |
2313 | break; |
2314 | } | |
2315 | break; | |
2316 | } | |
3881ac44 UB |
2317 | } |
2318 | spin_unlock_irqrestore(&list->lock, flags); | |
2319 | ||
42bd48e0 UB |
2320 | if (sk->sk_state == IUCV_CLOSING) { |
2321 | if (skb_queue_empty(&iucv_sk(sk)->send_skb_q)) { | |
2322 | sk->sk_state = IUCV_CLOSED; | |
2323 | sk->sk_state_change(sk); | |
2324 | } | |
2325 | } | |
2326 | ||
3881ac44 | 2327 | } |
9fbd87d4 UB |
2328 | |
2329 | /* | |
2330 | * afiucv_netdev_event: handle netdev notifier chain events | |
2331 | */ | |
2332 | static int afiucv_netdev_event(struct notifier_block *this, | |
2333 | unsigned long event, void *ptr) | |
2334 | { | |
351638e7 | 2335 | struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); |
9fbd87d4 UB |
2336 | struct sock *sk; |
2337 | struct iucv_sock *iucv; | |
2338 | ||
2339 | switch (event) { | |
2340 | case NETDEV_REBOOT: | |
2341 | case NETDEV_GOING_DOWN: | |
b67bfe0d | 2342 | sk_for_each(sk, &iucv_sk_list.head) { |
9fbd87d4 UB |
2343 | iucv = iucv_sk(sk); |
2344 | if ((iucv->hs_dev == event_dev) && | |
2345 | (sk->sk_state == IUCV_CONNECTED)) { | |
2346 | if (event == NETDEV_GOING_DOWN) | |
2347 | iucv_send_ctrl(sk, AF_IUCV_FLAG_FIN); | |
2348 | sk->sk_state = IUCV_DISCONN; | |
2349 | sk->sk_state_change(sk); | |
2350 | } | |
2351 | } | |
2352 | break; | |
2353 | case NETDEV_DOWN: | |
2354 | case NETDEV_UNREGISTER: | |
2355 | default: | |
2356 | break; | |
2357 | } | |
2358 | return NOTIFY_DONE; | |
2359 | } | |
2360 | ||
2361 | static struct notifier_block afiucv_netdev_notifier = { | |
2362 | .notifier_call = afiucv_netdev_event, | |
2363 | }; | |
2364 | ||
5708e868 | 2365 | static const struct proto_ops iucv_sock_ops = { |
eac3731b JH |
2366 | .family = PF_IUCV, |
2367 | .owner = THIS_MODULE, | |
2368 | .release = iucv_sock_release, | |
2369 | .bind = iucv_sock_bind, | |
2370 | .connect = iucv_sock_connect, | |
2371 | .listen = iucv_sock_listen, | |
2372 | .accept = iucv_sock_accept, | |
2373 | .getname = iucv_sock_getname, | |
2374 | .sendmsg = iucv_sock_sendmsg, | |
2375 | .recvmsg = iucv_sock_recvmsg, | |
a11e1d43 | 2376 | .poll = iucv_sock_poll, |
eac3731b JH |
2377 | .ioctl = sock_no_ioctl, |
2378 | .mmap = sock_no_mmap, | |
2379 | .socketpair = sock_no_socketpair, | |
2380 | .shutdown = iucv_sock_shutdown, | |
9d5c5d8f HB |
2381 | .setsockopt = iucv_sock_setsockopt, |
2382 | .getsockopt = iucv_sock_getsockopt, | |
eac3731b JH |
2383 | }; |
2384 | ||
ec1b4cf7 | 2385 | static const struct net_proto_family iucv_sock_family_ops = { |
eac3731b JH |
2386 | .family = AF_IUCV, |
2387 | .owner = THIS_MODULE, | |
2388 | .create = iucv_sock_create, | |
2389 | }; | |
2390 | ||
3881ac44 UB |
2391 | static struct packet_type iucv_packet_type = { |
2392 | .type = cpu_to_be16(ETH_P_AF_IUCV), | |
2393 | .func = afiucv_hs_rcv, | |
2394 | }; | |
2395 | ||
2396 | static int afiucv_iucv_init(void) | |
6fcd61f7 FB |
2397 | { |
2398 | int err; | |
2399 | ||
2400 | err = pr_iucv->iucv_register(&af_iucv_handler, 0); | |
2401 | if (err) | |
2402 | goto out; | |
2403 | /* establish dummy device */ | |
2404 | af_iucv_driver.bus = pr_iucv->bus; | |
2405 | err = driver_register(&af_iucv_driver); | |
2406 | if (err) | |
2407 | goto out_iucv; | |
2408 | af_iucv_dev = kzalloc(sizeof(struct device), GFP_KERNEL); | |
2409 | if (!af_iucv_dev) { | |
2410 | err = -ENOMEM; | |
2411 | goto out_driver; | |
2412 | } | |
2413 | dev_set_name(af_iucv_dev, "af_iucv"); | |
2414 | af_iucv_dev->bus = pr_iucv->bus; | |
2415 | af_iucv_dev->parent = pr_iucv->root; | |
2416 | af_iucv_dev->release = (void (*)(struct device *))kfree; | |
2417 | af_iucv_dev->driver = &af_iucv_driver; | |
2418 | err = device_register(af_iucv_dev); | |
2419 | if (err) | |
fa6a91e9 | 2420 | goto out_iucv_dev; |
6fcd61f7 FB |
2421 | return 0; |
2422 | ||
fa6a91e9 AY |
2423 | out_iucv_dev: |
2424 | put_device(af_iucv_dev); | |
6fcd61f7 FB |
2425 | out_driver: |
2426 | driver_unregister(&af_iucv_driver); | |
2427 | out_iucv: | |
2428 | pr_iucv->iucv_unregister(&af_iucv_handler, 0); | |
2429 | out: | |
2430 | return err; | |
2431 | } | |
2432 | ||
da99f056 | 2433 | static int __init afiucv_init(void) |
eac3731b JH |
2434 | { |
2435 | int err; | |
2436 | ||
3881ac44 UB |
2437 | if (MACHINE_IS_VM) { |
2438 | cpcmd("QUERY USERID", iucv_userid, sizeof(iucv_userid), &err); | |
2439 | if (unlikely(err)) { | |
2440 | WARN_ON(err); | |
2441 | err = -EPROTONOSUPPORT; | |
2442 | goto out; | |
2443 | } | |
eac3731b | 2444 | |
3881ac44 UB |
2445 | pr_iucv = try_then_request_module(symbol_get(iucv_if), "iucv"); |
2446 | if (!pr_iucv) { | |
2447 | printk(KERN_WARNING "iucv_if lookup failed\n"); | |
2448 | memset(&iucv_userid, 0, sizeof(iucv_userid)); | |
2449 | } | |
2450 | } else { | |
2451 | memset(&iucv_userid, 0, sizeof(iucv_userid)); | |
2452 | pr_iucv = NULL; | |
6fcd61f7 FB |
2453 | } |
2454 | ||
eac3731b JH |
2455 | err = proto_register(&iucv_proto, 0); |
2456 | if (err) | |
6fcd61f7 | 2457 | goto out; |
eac3731b JH |
2458 | err = sock_register(&iucv_sock_family_ops); |
2459 | if (err) | |
2460 | goto out_proto; | |
6fcd61f7 | 2461 | |
3881ac44 UB |
2462 | if (pr_iucv) { |
2463 | err = afiucv_iucv_init(); | |
2464 | if (err) | |
2465 | goto out_sock; | |
9fbd87d4 UB |
2466 | } else |
2467 | register_netdevice_notifier(&afiucv_netdev_notifier); | |
3881ac44 | 2468 | dev_add_pack(&iucv_packet_type); |
eac3731b JH |
2469 | return 0; |
2470 | ||
c23cad92 UB |
2471 | out_sock: |
2472 | sock_unregister(PF_IUCV); | |
eac3731b JH |
2473 | out_proto: |
2474 | proto_unregister(&iucv_proto); | |
eac3731b | 2475 | out: |
6fcd61f7 FB |
2476 | if (pr_iucv) |
2477 | symbol_put(iucv_if); | |
eac3731b JH |
2478 | return err; |
2479 | } | |
2480 | ||
2481 | static void __exit afiucv_exit(void) | |
2482 | { | |
3881ac44 UB |
2483 | if (pr_iucv) { |
2484 | device_unregister(af_iucv_dev); | |
2485 | driver_unregister(&af_iucv_driver); | |
2486 | pr_iucv->iucv_unregister(&af_iucv_handler, 0); | |
2487 | symbol_put(iucv_if); | |
9fbd87d4 UB |
2488 | } else |
2489 | unregister_netdevice_notifier(&afiucv_netdev_notifier); | |
3881ac44 | 2490 | dev_remove_pack(&iucv_packet_type); |
eac3731b JH |
2491 | sock_unregister(PF_IUCV); |
2492 | proto_unregister(&iucv_proto); | |
eac3731b JH |
2493 | } |
2494 | ||
2495 | module_init(afiucv_init); | |
2496 | module_exit(afiucv_exit); | |
2497 | ||
2498 | MODULE_AUTHOR("Jennifer Hunt <jenhunt@us.ibm.com>"); | |
2499 | MODULE_DESCRIPTION("IUCV Sockets ver " VERSION); | |
2500 | MODULE_VERSION(VERSION); | |
2501 | MODULE_LICENSE("GPL"); | |
2502 | MODULE_ALIAS_NETPROTO(PF_IUCV); |