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