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Commit | Line | Data |
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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 | ||
44b1e6b5 HB |
51 | #define TRGCLS_SIZE (sizeof(((struct iucv_message *)0)->class)) |
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 | int err = 0; |
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); | |
178 | return err; | |
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 | ||
324 | memset(skb->head, 0, ETH_HLEN); | |
d58ff351 | 325 | phs_hdr = skb_push(skb, sizeof(struct af_iucv_trans_hdr)); |
3881ac44 UB |
326 | skb_reset_mac_header(skb); |
327 | skb_reset_network_header(skb); | |
328 | skb_push(skb, ETH_HLEN); | |
329 | skb_reset_mac_header(skb); | |
330 | memset(phs_hdr, 0, sizeof(struct af_iucv_trans_hdr)); | |
331 | ||
332 | phs_hdr->magic = ETH_P_AF_IUCV; | |
333 | phs_hdr->version = 1; | |
334 | phs_hdr->flags = flags; | |
335 | if (flags == AF_IUCV_FLAG_SYN) | |
336 | phs_hdr->window = iucv->msglimit; | |
337 | else if ((flags == AF_IUCV_FLAG_WIN) || !flags) { | |
338 | confirm_recv = atomic_read(&iucv->msg_recv); | |
339 | phs_hdr->window = confirm_recv; | |
340 | if (confirm_recv) | |
341 | phs_hdr->flags = phs_hdr->flags | AF_IUCV_FLAG_WIN; | |
342 | } | |
343 | memcpy(phs_hdr->destUserID, iucv->dst_user_id, 8); | |
344 | memcpy(phs_hdr->destAppName, iucv->dst_name, 8); | |
345 | memcpy(phs_hdr->srcUserID, iucv->src_user_id, 8); | |
346 | memcpy(phs_hdr->srcAppName, iucv->src_name, 8); | |
347 | ASCEBC(phs_hdr->destUserID, sizeof(phs_hdr->destUserID)); | |
348 | ASCEBC(phs_hdr->destAppName, sizeof(phs_hdr->destAppName)); | |
349 | ASCEBC(phs_hdr->srcUserID, sizeof(phs_hdr->srcUserID)); | |
350 | ASCEBC(phs_hdr->srcAppName, sizeof(phs_hdr->srcAppName)); | |
351 | if (imsg) | |
352 | memcpy(&phs_hdr->iucv_hdr, imsg, sizeof(struct iucv_message)); | |
353 | ||
800c5eb7 | 354 | skb->dev = iucv->hs_dev; |
7d149bf7 JW |
355 | if (!skb->dev) { |
356 | err = -ENODEV; | |
357 | goto err_free; | |
358 | } | |
359 | if (!(skb->dev->flags & IFF_UP) || !netif_carrier_ok(skb->dev)) { | |
360 | err = -ENETDOWN; | |
361 | goto err_free; | |
362 | } | |
3881ac44 | 363 | if (skb->len > skb->dev->mtu) { |
7d149bf7 JW |
364 | if (sock->sk_type == SOCK_SEQPACKET) { |
365 | err = -EMSGSIZE; | |
366 | goto err_free; | |
367 | } | |
368 | skb_trim(skb, skb->dev->mtu); | |
3881ac44 | 369 | } |
2e56c26b | 370 | skb->protocol = cpu_to_be16(ETH_P_AF_IUCV); |
3881ac44 | 371 | nskb = skb_clone(skb, GFP_ATOMIC); |
7d149bf7 JW |
372 | if (!nskb) { |
373 | err = -ENOMEM; | |
374 | goto err_free; | |
375 | } | |
376 | ||
3881ac44 UB |
377 | skb_queue_tail(&iucv->send_skb_q, nskb); |
378 | err = dev_queue_xmit(skb); | |
800c5eb7 | 379 | if (net_xmit_eval(err)) { |
3881ac44 UB |
380 | skb_unlink(nskb, &iucv->send_skb_q); |
381 | kfree_skb(nskb); | |
382 | } else { | |
383 | atomic_sub(confirm_recv, &iucv->msg_recv); | |
384 | WARN_ON(atomic_read(&iucv->msg_recv) < 0); | |
385 | } | |
800c5eb7 | 386 | return net_xmit_eval(err); |
7d149bf7 JW |
387 | |
388 | err_free: | |
389 | kfree_skb(skb); | |
390 | return err; | |
3881ac44 UB |
391 | } |
392 | ||
eac3731b JH |
393 | static struct sock *__iucv_get_sock_by_name(char *nm) |
394 | { | |
395 | struct sock *sk; | |
eac3731b | 396 | |
b67bfe0d | 397 | sk_for_each(sk, &iucv_sk_list.head) |
eac3731b JH |
398 | if (!memcmp(&iucv_sk(sk)->src_name, nm, 8)) |
399 | return sk; | |
400 | ||
401 | return NULL; | |
402 | } | |
403 | ||
404 | static void iucv_sock_destruct(struct sock *sk) | |
405 | { | |
406 | skb_queue_purge(&sk->sk_receive_queue); | |
82492a35 UB |
407 | skb_queue_purge(&sk->sk_error_queue); |
408 | ||
409 | sk_mem_reclaim(sk); | |
410 | ||
411 | if (!sock_flag(sk, SOCK_DEAD)) { | |
412 | pr_err("Attempt to release alive iucv socket %p\n", sk); | |
413 | return; | |
414 | } | |
415 | ||
416 | WARN_ON(atomic_read(&sk->sk_rmem_alloc)); | |
b2c9c5df | 417 | WARN_ON(refcount_read(&sk->sk_wmem_alloc)); |
82492a35 UB |
418 | WARN_ON(sk->sk_wmem_queued); |
419 | WARN_ON(sk->sk_forward_alloc); | |
eac3731b JH |
420 | } |
421 | ||
422 | /* Cleanup Listen */ | |
423 | static void iucv_sock_cleanup_listen(struct sock *parent) | |
424 | { | |
425 | struct sock *sk; | |
426 | ||
427 | /* Close non-accepted connections */ | |
428 | while ((sk = iucv_accept_dequeue(parent, NULL))) { | |
429 | iucv_sock_close(sk); | |
430 | iucv_sock_kill(sk); | |
431 | } | |
432 | ||
433 | parent->sk_state = IUCV_CLOSED; | |
eac3731b JH |
434 | } |
435 | ||
7514bab0 | 436 | /* Kill socket (only if zapped and orphaned) */ |
eac3731b JH |
437 | static void iucv_sock_kill(struct sock *sk) |
438 | { | |
439 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
440 | return; | |
441 | ||
442 | iucv_sock_unlink(&iucv_sk_list, sk); | |
443 | sock_set_flag(sk, SOCK_DEAD); | |
444 | sock_put(sk); | |
445 | } | |
446 | ||
7d316b94 UB |
447 | /* Terminate an IUCV path */ |
448 | static void iucv_sever_path(struct sock *sk, int with_user_data) | |
449 | { | |
450 | unsigned char user_data[16]; | |
451 | struct iucv_sock *iucv = iucv_sk(sk); | |
452 | struct iucv_path *path = iucv->path; | |
453 | ||
454 | if (iucv->path) { | |
455 | iucv->path = NULL; | |
456 | if (with_user_data) { | |
457 | low_nmcpy(user_data, iucv->src_name); | |
458 | high_nmcpy(user_data, iucv->dst_name); | |
459 | ASCEBC(user_data, sizeof(user_data)); | |
460 | pr_iucv->path_sever(path, user_data); | |
461 | } else | |
462 | pr_iucv->path_sever(path, NULL); | |
463 | iucv_path_free(path); | |
464 | } | |
465 | } | |
466 | ||
4e0ad322 | 467 | /* Send controlling flags through an IUCV socket for HIPER transport */ |
9fbd87d4 UB |
468 | static int iucv_send_ctrl(struct sock *sk, u8 flags) |
469 | { | |
470 | int err = 0; | |
471 | int blen; | |
472 | struct sk_buff *skb; | |
4e0ad322 | 473 | u8 shutdown = 0; |
9fbd87d4 UB |
474 | |
475 | blen = sizeof(struct af_iucv_trans_hdr) + ETH_HLEN; | |
4e0ad322 UB |
476 | if (sk->sk_shutdown & SEND_SHUTDOWN) { |
477 | /* controlling flags should be sent anyway */ | |
478 | shutdown = sk->sk_shutdown; | |
479 | sk->sk_shutdown &= RCV_SHUTDOWN; | |
480 | } | |
9fbd87d4 UB |
481 | skb = sock_alloc_send_skb(sk, blen, 1, &err); |
482 | if (skb) { | |
483 | skb_reserve(skb, blen); | |
484 | err = afiucv_hs_send(NULL, sk, skb, flags); | |
485 | } | |
4e0ad322 UB |
486 | if (shutdown) |
487 | sk->sk_shutdown = shutdown; | |
9fbd87d4 UB |
488 | return err; |
489 | } | |
490 | ||
eac3731b JH |
491 | /* Close an IUCV socket */ |
492 | static void iucv_sock_close(struct sock *sk) | |
493 | { | |
eac3731b | 494 | struct iucv_sock *iucv = iucv_sk(sk); |
561e0360 | 495 | unsigned long timeo; |
800c5eb7 | 496 | int err = 0; |
eac3731b | 497 | |
eac3731b JH |
498 | lock_sock(sk); |
499 | ||
da99f056 | 500 | switch (sk->sk_state) { |
eac3731b JH |
501 | case IUCV_LISTEN: |
502 | iucv_sock_cleanup_listen(sk); | |
503 | break; | |
504 | ||
505 | case IUCV_CONNECTED: | |
3881ac44 | 506 | if (iucv->transport == AF_IUCV_TRANS_HIPER) { |
9fbd87d4 | 507 | err = iucv_send_ctrl(sk, AF_IUCV_FLAG_FIN); |
3881ac44 UB |
508 | sk->sk_state = IUCV_DISCONN; |
509 | sk->sk_state_change(sk); | |
510 | } | |
816abbad | 511 | case IUCV_DISCONN: /* fall through */ |
561e0360 JH |
512 | sk->sk_state = IUCV_CLOSING; |
513 | sk->sk_state_change(sk); | |
514 | ||
800c5eb7 | 515 | if (!err && !skb_queue_empty(&iucv->send_skb_q)) { |
561e0360 JH |
516 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) |
517 | timeo = sk->sk_lingertime; | |
518 | else | |
519 | timeo = IUCV_DISCONN_TIMEOUT; | |
9f6298a6 | 520 | iucv_sock_wait(sk, |
0ea920d2 HB |
521 | iucv_sock_in_state(sk, IUCV_CLOSED, 0), |
522 | timeo); | |
561e0360 JH |
523 | } |
524 | ||
bbe188c8 | 525 | case IUCV_CLOSING: /* fall through */ |
561e0360 JH |
526 | sk->sk_state = IUCV_CLOSED; |
527 | sk->sk_state_change(sk); | |
528 | ||
eac3731b JH |
529 | sk->sk_err = ECONNRESET; |
530 | sk->sk_state_change(sk); | |
531 | ||
800c5eb7 | 532 | skb_queue_purge(&iucv->send_skb_q); |
561e0360 | 533 | skb_queue_purge(&iucv->backlog_skb_q); |
eac3731b | 534 | |
7d316b94 UB |
535 | default: /* fall through */ |
536 | iucv_sever_path(sk, 1); | |
3ff50b79 | 537 | } |
eac3731b | 538 | |
800c5eb7 UB |
539 | if (iucv->hs_dev) { |
540 | dev_put(iucv->hs_dev); | |
541 | iucv->hs_dev = NULL; | |
542 | sk->sk_bound_dev_if = 0; | |
543 | } | |
544 | ||
7514bab0 HB |
545 | /* mark socket for deletion by iucv_sock_kill() */ |
546 | sock_set_flag(sk, SOCK_ZAPPED); | |
547 | ||
eac3731b | 548 | release_sock(sk); |
eac3731b JH |
549 | } |
550 | ||
551 | static void iucv_sock_init(struct sock *sk, struct sock *parent) | |
552 | { | |
02f06918 | 553 | if (parent) { |
eac3731b | 554 | sk->sk_type = parent->sk_type; |
02f06918 PM |
555 | security_sk_clone(parent, sk); |
556 | } | |
eac3731b JH |
557 | } |
558 | ||
11aa9c28 | 559 | static struct sock *iucv_sock_alloc(struct socket *sock, int proto, gfp_t prio, int kern) |
eac3731b JH |
560 | { |
561 | struct sock *sk; | |
493d3971 | 562 | struct iucv_sock *iucv; |
eac3731b | 563 | |
11aa9c28 | 564 | sk = sk_alloc(&init_net, PF_IUCV, prio, &iucv_proto, kern); |
eac3731b JH |
565 | if (!sk) |
566 | return NULL; | |
493d3971 | 567 | iucv = iucv_sk(sk); |
eac3731b JH |
568 | |
569 | sock_init_data(sock, sk); | |
493d3971 UB |
570 | INIT_LIST_HEAD(&iucv->accept_q); |
571 | spin_lock_init(&iucv->accept_q_lock); | |
572 | skb_queue_head_init(&iucv->send_skb_q); | |
573 | INIT_LIST_HEAD(&iucv->message_q.list); | |
574 | spin_lock_init(&iucv->message_q.lock); | |
575 | skb_queue_head_init(&iucv->backlog_skb_q); | |
576 | iucv->send_tag = 0; | |
3881ac44 | 577 | atomic_set(&iucv->pendings, 0); |
493d3971 | 578 | iucv->flags = 0; |
3881ac44 UB |
579 | iucv->msglimit = 0; |
580 | atomic_set(&iucv->msg_sent, 0); | |
581 | atomic_set(&iucv->msg_recv, 0); | |
493d3971 | 582 | iucv->path = NULL; |
3881ac44 | 583 | iucv->sk_txnotify = afiucv_hs_callback_txnotify; |
493d3971 | 584 | memset(&iucv->src_user_id , 0, 32); |
3881ac44 UB |
585 | if (pr_iucv) |
586 | iucv->transport = AF_IUCV_TRANS_IUCV; | |
587 | else | |
588 | iucv->transport = AF_IUCV_TRANS_HIPER; | |
eac3731b JH |
589 | |
590 | sk->sk_destruct = iucv_sock_destruct; | |
591 | sk->sk_sndtimeo = IUCV_CONN_TIMEOUT; | |
592 | sk->sk_allocation = GFP_DMA; | |
593 | ||
594 | sock_reset_flag(sk, SOCK_ZAPPED); | |
595 | ||
596 | sk->sk_protocol = proto; | |
597 | sk->sk_state = IUCV_OPEN; | |
598 | ||
eac3731b JH |
599 | iucv_sock_link(&iucv_sk_list, sk); |
600 | return sk; | |
601 | } | |
602 | ||
603 | /* Create an IUCV socket */ | |
3f378b68 EP |
604 | static int iucv_sock_create(struct net *net, struct socket *sock, int protocol, |
605 | int kern) | |
eac3731b JH |
606 | { |
607 | struct sock *sk; | |
608 | ||
aa8e71f5 HB |
609 | if (protocol && protocol != PF_IUCV) |
610 | return -EPROTONOSUPPORT; | |
eac3731b JH |
611 | |
612 | sock->state = SS_UNCONNECTED; | |
aa8e71f5 HB |
613 | |
614 | switch (sock->type) { | |
615 | case SOCK_STREAM: | |
616 | sock->ops = &iucv_sock_ops; | |
617 | break; | |
618 | case SOCK_SEQPACKET: | |
619 | /* currently, proto ops can handle both sk types */ | |
620 | sock->ops = &iucv_sock_ops; | |
621 | break; | |
622 | default: | |
623 | return -ESOCKTNOSUPPORT; | |
624 | } | |
eac3731b | 625 | |
11aa9c28 | 626 | sk = iucv_sock_alloc(sock, protocol, GFP_KERNEL, kern); |
eac3731b JH |
627 | if (!sk) |
628 | return -ENOMEM; | |
629 | ||
630 | iucv_sock_init(sk, NULL); | |
631 | ||
632 | return 0; | |
633 | } | |
634 | ||
635 | void iucv_sock_link(struct iucv_sock_list *l, struct sock *sk) | |
636 | { | |
637 | write_lock_bh(&l->lock); | |
638 | sk_add_node(sk, &l->head); | |
639 | write_unlock_bh(&l->lock); | |
640 | } | |
641 | ||
642 | void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *sk) | |
643 | { | |
644 | write_lock_bh(&l->lock); | |
645 | sk_del_node_init(sk); | |
646 | write_unlock_bh(&l->lock); | |
647 | } | |
648 | ||
649 | void iucv_accept_enqueue(struct sock *parent, struct sock *sk) | |
650 | { | |
febca281 UB |
651 | unsigned long flags; |
652 | struct iucv_sock *par = iucv_sk(parent); | |
653 | ||
eac3731b | 654 | sock_hold(sk); |
febca281 UB |
655 | spin_lock_irqsave(&par->accept_q_lock, flags); |
656 | list_add_tail(&iucv_sk(sk)->accept_q, &par->accept_q); | |
657 | spin_unlock_irqrestore(&par->accept_q_lock, flags); | |
eac3731b | 658 | iucv_sk(sk)->parent = parent; |
49f5eba7 | 659 | sk_acceptq_added(parent); |
eac3731b JH |
660 | } |
661 | ||
662 | void iucv_accept_unlink(struct sock *sk) | |
663 | { | |
febca281 UB |
664 | unsigned long flags; |
665 | struct iucv_sock *par = iucv_sk(iucv_sk(sk)->parent); | |
666 | ||
667 | spin_lock_irqsave(&par->accept_q_lock, flags); | |
eac3731b | 668 | list_del_init(&iucv_sk(sk)->accept_q); |
febca281 | 669 | spin_unlock_irqrestore(&par->accept_q_lock, flags); |
49f5eba7 | 670 | sk_acceptq_removed(iucv_sk(sk)->parent); |
eac3731b JH |
671 | iucv_sk(sk)->parent = NULL; |
672 | sock_put(sk); | |
673 | } | |
674 | ||
675 | struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock) | |
676 | { | |
677 | struct iucv_sock *isk, *n; | |
678 | struct sock *sk; | |
679 | ||
da99f056 | 680 | list_for_each_entry_safe(isk, n, &iucv_sk(parent)->accept_q, accept_q) { |
eac3731b JH |
681 | sk = (struct sock *) isk; |
682 | lock_sock(sk); | |
683 | ||
684 | if (sk->sk_state == IUCV_CLOSED) { | |
eac3731b | 685 | iucv_accept_unlink(sk); |
febca281 | 686 | release_sock(sk); |
eac3731b JH |
687 | continue; |
688 | } | |
689 | ||
690 | if (sk->sk_state == IUCV_CONNECTED || | |
aac6399c | 691 | sk->sk_state == IUCV_DISCONN || |
eac3731b JH |
692 | !newsock) { |
693 | iucv_accept_unlink(sk); | |
694 | if (newsock) | |
695 | sock_graft(sk, newsock); | |
696 | ||
eac3731b JH |
697 | release_sock(sk); |
698 | return sk; | |
699 | } | |
700 | ||
701 | release_sock(sk); | |
702 | } | |
703 | return NULL; | |
704 | } | |
705 | ||
53a4b499 PH |
706 | static void __iucv_auto_name(struct iucv_sock *iucv) |
707 | { | |
708 | char name[12]; | |
709 | ||
710 | sprintf(name, "%08x", atomic_inc_return(&iucv_sk_list.autobind_name)); | |
711 | while (__iucv_get_sock_by_name(name)) { | |
712 | sprintf(name, "%08x", | |
713 | atomic_inc_return(&iucv_sk_list.autobind_name)); | |
714 | } | |
715 | memcpy(iucv->src_name, name, 8); | |
716 | } | |
717 | ||
eac3731b JH |
718 | /* Bind an unbound socket */ |
719 | static int iucv_sock_bind(struct socket *sock, struct sockaddr *addr, | |
720 | int addr_len) | |
721 | { | |
722 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
723 | struct sock *sk = sock->sk; | |
724 | struct iucv_sock *iucv; | |
3881ac44 UB |
725 | int err = 0; |
726 | struct net_device *dev; | |
727 | char uid[9]; | |
eac3731b JH |
728 | |
729 | /* Verify the input sockaddr */ | |
e3c42b61 MJ |
730 | if (addr_len < sizeof(struct sockaddr_iucv) || |
731 | addr->sa_family != AF_IUCV) | |
52a82e23 UB |
732 | return -EINVAL; |
733 | ||
eac3731b JH |
734 | lock_sock(sk); |
735 | if (sk->sk_state != IUCV_OPEN) { | |
736 | err = -EBADFD; | |
737 | goto done; | |
738 | } | |
739 | ||
740 | write_lock_bh(&iucv_sk_list.lock); | |
741 | ||
742 | iucv = iucv_sk(sk); | |
743 | if (__iucv_get_sock_by_name(sa->siucv_name)) { | |
744 | err = -EADDRINUSE; | |
745 | goto done_unlock; | |
746 | } | |
3881ac44 | 747 | if (iucv->path) |
eac3731b | 748 | goto done_unlock; |
eac3731b JH |
749 | |
750 | /* Bind the socket */ | |
3881ac44 UB |
751 | if (pr_iucv) |
752 | if (!memcmp(sa->siucv_user_id, iucv_userid, 8)) | |
753 | goto vm_bind; /* VM IUCV transport */ | |
eac3731b | 754 | |
3881ac44 UB |
755 | /* try hiper transport */ |
756 | memcpy(uid, sa->siucv_user_id, sizeof(uid)); | |
757 | ASCEBC(uid, 8); | |
758 | rcu_read_lock(); | |
759 | for_each_netdev_rcu(&init_net, dev) { | |
760 | if (!memcmp(dev->perm_addr, uid, 8)) { | |
3881ac44 | 761 | memcpy(iucv->src_user_id, sa->siucv_user_id, 8); |
53a4b499 PH |
762 | /* Check for unitialized siucv_name */ |
763 | if (strncmp(sa->siucv_name, " ", 8) == 0) | |
764 | __iucv_auto_name(iucv); | |
765 | else | |
766 | memcpy(iucv->src_name, sa->siucv_name, 8); | |
816abbad | 767 | sk->sk_bound_dev_if = dev->ifindex; |
800c5eb7 UB |
768 | iucv->hs_dev = dev; |
769 | dev_hold(dev); | |
3881ac44 UB |
770 | sk->sk_state = IUCV_BOUND; |
771 | iucv->transport = AF_IUCV_TRANS_HIPER; | |
772 | if (!iucv->msglimit) | |
773 | iucv->msglimit = IUCV_HIPER_MSGLIM_DEFAULT; | |
774 | rcu_read_unlock(); | |
775 | goto done_unlock; | |
776 | } | |
777 | } | |
778 | rcu_read_unlock(); | |
779 | vm_bind: | |
780 | if (pr_iucv) { | |
781 | /* use local userid for backward compat */ | |
782 | memcpy(iucv->src_name, sa->siucv_name, 8); | |
783 | memcpy(iucv->src_user_id, iucv_userid, 8); | |
784 | sk->sk_state = IUCV_BOUND; | |
785 | iucv->transport = AF_IUCV_TRANS_IUCV; | |
786 | if (!iucv->msglimit) | |
787 | iucv->msglimit = IUCV_QUEUELEN_DEFAULT; | |
788 | goto done_unlock; | |
789 | } | |
790 | /* found no dev to bind */ | |
791 | err = -ENODEV; | |
eac3731b JH |
792 | done_unlock: |
793 | /* Release the socket list lock */ | |
794 | write_unlock_bh(&iucv_sk_list.lock); | |
795 | done: | |
796 | release_sock(sk); | |
797 | return err; | |
798 | } | |
799 | ||
800 | /* Automatically bind an unbound socket */ | |
801 | static int iucv_sock_autobind(struct sock *sk) | |
802 | { | |
803 | struct iucv_sock *iucv = iucv_sk(sk); | |
eac3731b JH |
804 | int err = 0; |
805 | ||
aac6399c | 806 | if (unlikely(!pr_iucv)) |
eac3731b JH |
807 | return -EPROTO; |
808 | ||
aac6399c | 809 | memcpy(iucv->src_user_id, iucv_userid, 8); |
eac3731b JH |
810 | |
811 | write_lock_bh(&iucv_sk_list.lock); | |
53a4b499 | 812 | __iucv_auto_name(iucv); |
eac3731b JH |
813 | write_unlock_bh(&iucv_sk_list.lock); |
814 | ||
3881ac44 UB |
815 | if (!iucv->msglimit) |
816 | iucv->msglimit = IUCV_QUEUELEN_DEFAULT; | |
817 | ||
eac3731b JH |
818 | return err; |
819 | } | |
820 | ||
3881ac44 | 821 | static int afiucv_path_connect(struct socket *sock, struct sockaddr *addr) |
eac3731b JH |
822 | { |
823 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
824 | struct sock *sk = sock->sk; | |
493d3971 | 825 | struct iucv_sock *iucv = iucv_sk(sk); |
eac3731b JH |
826 | unsigned char user_data[16]; |
827 | int err; | |
828 | ||
eac3731b | 829 | high_nmcpy(user_data, sa->siucv_name); |
493d3971 | 830 | low_nmcpy(user_data, iucv->src_name); |
eac3731b JH |
831 | ASCEBC(user_data, sizeof(user_data)); |
832 | ||
eac3731b | 833 | /* Create path. */ |
09488e2e | 834 | iucv->path = iucv_path_alloc(iucv->msglimit, |
b8942e3b | 835 | IUCV_IPRMDATA, GFP_KERNEL); |
d4444722 UB |
836 | if (!iucv->path) { |
837 | err = -ENOMEM; | |
838 | goto done; | |
839 | } | |
6fcd61f7 FB |
840 | err = pr_iucv->path_connect(iucv->path, &af_iucv_handler, |
841 | sa->siucv_user_id, NULL, user_data, | |
842 | sk); | |
eac3731b JH |
843 | if (err) { |
844 | iucv_path_free(iucv->path); | |
845 | iucv->path = NULL; | |
55cdea9e HB |
846 | switch (err) { |
847 | case 0x0b: /* Target communicator is not logged on */ | |
848 | err = -ENETUNREACH; | |
849 | break; | |
850 | case 0x0d: /* Max connections for this guest exceeded */ | |
851 | case 0x0e: /* Max connections for target guest exceeded */ | |
852 | err = -EAGAIN; | |
853 | break; | |
854 | case 0x0f: /* Missing IUCV authorization */ | |
855 | err = -EACCES; | |
856 | break; | |
857 | default: | |
858 | err = -ECONNREFUSED; | |
859 | break; | |
860 | } | |
eac3731b | 861 | } |
3881ac44 UB |
862 | done: |
863 | return err; | |
864 | } | |
eac3731b | 865 | |
3881ac44 UB |
866 | /* Connect an unconnected socket */ |
867 | static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr, | |
868 | int alen, int flags) | |
869 | { | |
870 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
871 | struct sock *sk = sock->sk; | |
872 | struct iucv_sock *iucv = iucv_sk(sk); | |
873 | int err; | |
874 | ||
e3c42b61 | 875 | if (alen < sizeof(struct sockaddr_iucv) || addr->sa_family != AF_IUCV) |
3881ac44 UB |
876 | return -EINVAL; |
877 | ||
878 | if (sk->sk_state != IUCV_OPEN && sk->sk_state != IUCV_BOUND) | |
879 | return -EBADFD; | |
880 | ||
881 | if (sk->sk_state == IUCV_OPEN && | |
882 | iucv->transport == AF_IUCV_TRANS_HIPER) | |
883 | return -EBADFD; /* explicit bind required */ | |
884 | ||
885 | if (sk->sk_type != SOCK_STREAM && sk->sk_type != SOCK_SEQPACKET) | |
886 | return -EINVAL; | |
887 | ||
888 | if (sk->sk_state == IUCV_OPEN) { | |
889 | err = iucv_sock_autobind(sk); | |
890 | if (unlikely(err)) | |
891 | return err; | |
892 | } | |
893 | ||
894 | lock_sock(sk); | |
895 | ||
896 | /* Set the destination information */ | |
897 | memcpy(iucv->dst_user_id, sa->siucv_user_id, 8); | |
898 | memcpy(iucv->dst_name, sa->siucv_name, 8); | |
899 | ||
900 | if (iucv->transport == AF_IUCV_TRANS_HIPER) | |
9fbd87d4 | 901 | err = iucv_send_ctrl(sock->sk, AF_IUCV_FLAG_SYN); |
3881ac44 UB |
902 | else |
903 | err = afiucv_path_connect(sock, addr); | |
904 | if (err) | |
905 | goto done; | |
906 | ||
907 | if (sk->sk_state != IUCV_CONNECTED) | |
0ea920d2 HB |
908 | err = iucv_sock_wait(sk, iucv_sock_in_state(sk, IUCV_CONNECTED, |
909 | IUCV_DISCONN), | |
910 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
eac3731b | 911 | |
3881ac44 | 912 | if (sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_CLOSED) |
b8942e3b | 913 | err = -ECONNREFUSED; |
18becbc5 | 914 | |
7d316b94 UB |
915 | if (err && iucv->transport == AF_IUCV_TRANS_IUCV) |
916 | iucv_sever_path(sk, 0); | |
18becbc5 | 917 | |
eac3731b JH |
918 | done: |
919 | release_sock(sk); | |
920 | return err; | |
921 | } | |
922 | ||
923 | /* Move a socket into listening state. */ | |
924 | static int iucv_sock_listen(struct socket *sock, int backlog) | |
925 | { | |
926 | struct sock *sk = sock->sk; | |
927 | int err; | |
928 | ||
929 | lock_sock(sk); | |
930 | ||
931 | err = -EINVAL; | |
aa8e71f5 HB |
932 | if (sk->sk_state != IUCV_BOUND) |
933 | goto done; | |
934 | ||
935 | if (sock->type != SOCK_STREAM && sock->type != SOCK_SEQPACKET) | |
eac3731b JH |
936 | goto done; |
937 | ||
938 | sk->sk_max_ack_backlog = backlog; | |
939 | sk->sk_ack_backlog = 0; | |
940 | sk->sk_state = IUCV_LISTEN; | |
941 | err = 0; | |
942 | ||
943 | done: | |
944 | release_sock(sk); | |
945 | return err; | |
946 | } | |
947 | ||
948 | /* Accept a pending connection */ | |
949 | static int iucv_sock_accept(struct socket *sock, struct socket *newsock, | |
cdfbabfb | 950 | int flags, bool kern) |
eac3731b JH |
951 | { |
952 | DECLARE_WAITQUEUE(wait, current); | |
953 | struct sock *sk = sock->sk, *nsk; | |
954 | long timeo; | |
955 | int err = 0; | |
956 | ||
561e0360 | 957 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
eac3731b JH |
958 | |
959 | if (sk->sk_state != IUCV_LISTEN) { | |
960 | err = -EBADFD; | |
961 | goto done; | |
962 | } | |
963 | ||
964 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
965 | ||
966 | /* Wait for an incoming connection */ | |
aa395145 | 967 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
da99f056 | 968 | while (!(nsk = iucv_accept_dequeue(sk, newsock))) { |
eac3731b JH |
969 | set_current_state(TASK_INTERRUPTIBLE); |
970 | if (!timeo) { | |
971 | err = -EAGAIN; | |
972 | break; | |
973 | } | |
974 | ||
975 | release_sock(sk); | |
976 | timeo = schedule_timeout(timeo); | |
561e0360 | 977 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
eac3731b JH |
978 | |
979 | if (sk->sk_state != IUCV_LISTEN) { | |
980 | err = -EBADFD; | |
981 | break; | |
982 | } | |
983 | ||
984 | if (signal_pending(current)) { | |
985 | err = sock_intr_errno(timeo); | |
986 | break; | |
987 | } | |
988 | } | |
989 | ||
990 | set_current_state(TASK_RUNNING); | |
aa395145 | 991 | remove_wait_queue(sk_sleep(sk), &wait); |
eac3731b JH |
992 | |
993 | if (err) | |
994 | goto done; | |
995 | ||
996 | newsock->state = SS_CONNECTED; | |
997 | ||
998 | done: | |
999 | release_sock(sk); | |
1000 | return err; | |
1001 | } | |
1002 | ||
1003 | static int iucv_sock_getname(struct socket *sock, struct sockaddr *addr, | |
1004 | int *len, int peer) | |
1005 | { | |
1006 | struct sockaddr_iucv *siucv = (struct sockaddr_iucv *) addr; | |
1007 | struct sock *sk = sock->sk; | |
493d3971 | 1008 | struct iucv_sock *iucv = iucv_sk(sk); |
eac3731b JH |
1009 | |
1010 | addr->sa_family = AF_IUCV; | |
1011 | *len = sizeof(struct sockaddr_iucv); | |
1012 | ||
1013 | if (peer) { | |
493d3971 UB |
1014 | memcpy(siucv->siucv_user_id, iucv->dst_user_id, 8); |
1015 | memcpy(siucv->siucv_name, iucv->dst_name, 8); | |
eac3731b | 1016 | } else { |
493d3971 UB |
1017 | memcpy(siucv->siucv_user_id, iucv->src_user_id, 8); |
1018 | memcpy(siucv->siucv_name, iucv->src_name, 8); | |
eac3731b JH |
1019 | } |
1020 | memset(&siucv->siucv_port, 0, sizeof(siucv->siucv_port)); | |
1021 | memset(&siucv->siucv_addr, 0, sizeof(siucv->siucv_addr)); | |
493d3971 | 1022 | memset(&siucv->siucv_nodeid, 0, sizeof(siucv->siucv_nodeid)); |
eac3731b JH |
1023 | |
1024 | return 0; | |
1025 | } | |
1026 | ||
b8942e3b HB |
1027 | /** |
1028 | * iucv_send_iprm() - Send socket data in parameter list of an iucv message. | |
1029 | * @path: IUCV path | |
1030 | * @msg: Pointer to a struct iucv_message | |
1031 | * @skb: The socket data to send, skb->len MUST BE <= 7 | |
1032 | * | |
1033 | * Send the socket data in the parameter list in the iucv message | |
1034 | * (IUCV_IPRMDATA). The socket data is stored at index 0 to 6 in the parameter | |
1035 | * list and the socket data len at index 7 (last byte). | |
1036 | * See also iucv_msg_length(). | |
1037 | * | |
1038 | * Returns the error code from the iucv_message_send() call. | |
1039 | */ | |
1040 | static int iucv_send_iprm(struct iucv_path *path, struct iucv_message *msg, | |
1041 | struct sk_buff *skb) | |
1042 | { | |
1043 | u8 prmdata[8]; | |
1044 | ||
1045 | memcpy(prmdata, (void *) skb->data, skb->len); | |
1046 | prmdata[7] = 0xff - (u8) skb->len; | |
6fcd61f7 | 1047 | return pr_iucv->message_send(path, msg, IUCV_IPRMDATA, 0, |
b8942e3b HB |
1048 | (void *) prmdata, 8); |
1049 | } | |
1050 | ||
1b784140 YX |
1051 | static int iucv_sock_sendmsg(struct socket *sock, struct msghdr *msg, |
1052 | size_t len) | |
eac3731b JH |
1053 | { |
1054 | struct sock *sk = sock->sk; | |
1055 | struct iucv_sock *iucv = iucv_sk(sk); | |
dc5367bc JW |
1056 | size_t headroom = 0; |
1057 | size_t linear; | |
eac3731b | 1058 | struct sk_buff *skb; |
0506eb01 | 1059 | struct iucv_message txmsg = {0}; |
44b1e6b5 HB |
1060 | struct cmsghdr *cmsg; |
1061 | int cmsg_done; | |
0ea920d2 | 1062 | long timeo; |
8f7c502c UB |
1063 | char user_id[9]; |
1064 | char appl_id[9]; | |
eac3731b | 1065 | int err; |
0ea920d2 | 1066 | int noblock = msg->msg_flags & MSG_DONTWAIT; |
eac3731b JH |
1067 | |
1068 | err = sock_error(sk); | |
1069 | if (err) | |
1070 | return err; | |
1071 | ||
1072 | if (msg->msg_flags & MSG_OOB) | |
1073 | return -EOPNOTSUPP; | |
1074 | ||
aa8e71f5 HB |
1075 | /* SOCK_SEQPACKET: we do not support segmented records */ |
1076 | if (sk->sk_type == SOCK_SEQPACKET && !(msg->msg_flags & MSG_EOR)) | |
1077 | return -EOPNOTSUPP; | |
1078 | ||
eac3731b JH |
1079 | lock_sock(sk); |
1080 | ||
1081 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1082 | err = -EPIPE; | |
1083 | goto out; | |
1084 | } | |
1085 | ||
bb664f49 HB |
1086 | /* Return if the socket is not in connected state */ |
1087 | if (sk->sk_state != IUCV_CONNECTED) { | |
1088 | err = -ENOTCONN; | |
1089 | goto out; | |
1090 | } | |
44b1e6b5 | 1091 | |
bb664f49 HB |
1092 | /* initialize defaults */ |
1093 | cmsg_done = 0; /* check for duplicate headers */ | |
1094 | txmsg.class = 0; | |
44b1e6b5 | 1095 | |
bb664f49 | 1096 | /* iterate over control messages */ |
f95b414e | 1097 | for_each_cmsghdr(cmsg, msg) { |
bb664f49 HB |
1098 | if (!CMSG_OK(msg, cmsg)) { |
1099 | err = -EINVAL; | |
1100 | goto out; | |
1101 | } | |
44b1e6b5 | 1102 | |
bb664f49 HB |
1103 | if (cmsg->cmsg_level != SOL_IUCV) |
1104 | continue; | |
44b1e6b5 | 1105 | |
bb664f49 HB |
1106 | if (cmsg->cmsg_type & cmsg_done) { |
1107 | err = -EINVAL; | |
1108 | goto out; | |
1109 | } | |
1110 | cmsg_done |= cmsg->cmsg_type; | |
44b1e6b5 | 1111 | |
bb664f49 HB |
1112 | switch (cmsg->cmsg_type) { |
1113 | case SCM_IUCV_TRGCLS: | |
1114 | if (cmsg->cmsg_len != CMSG_LEN(TRGCLS_SIZE)) { | |
44b1e6b5 HB |
1115 | err = -EINVAL; |
1116 | goto out; | |
1117 | } | |
44b1e6b5 | 1118 | |
bb664f49 HB |
1119 | /* set iucv message target class */ |
1120 | memcpy(&txmsg.class, | |
1121 | (void *) CMSG_DATA(cmsg), TRGCLS_SIZE); | |
44b1e6b5 | 1122 | |
bb664f49 | 1123 | break; |
44b1e6b5 | 1124 | |
bb664f49 HB |
1125 | default: |
1126 | err = -EINVAL; | |
1127 | goto out; | |
44b1e6b5 | 1128 | } |
bb664f49 | 1129 | } |
44b1e6b5 | 1130 | |
bb664f49 HB |
1131 | /* allocate one skb for each iucv message: |
1132 | * this is fine for SOCK_SEQPACKET (unless we want to support | |
1133 | * segmented records using the MSG_EOR flag), but | |
1134 | * for SOCK_STREAM we might want to improve it in future */ | |
dc5367bc JW |
1135 | if (iucv->transport == AF_IUCV_TRANS_HIPER) { |
1136 | headroom = sizeof(struct af_iucv_trans_hdr) + ETH_HLEN; | |
e5374399 EC |
1137 | linear = len; |
1138 | } else { | |
dc5367bc JW |
1139 | if (len < PAGE_SIZE) { |
1140 | linear = len; | |
1141 | } else { | |
1142 | /* In nonlinear "classic" iucv skb, | |
1143 | * reserve space for iucv_array | |
1144 | */ | |
1145 | headroom = sizeof(struct iucv_array) * | |
1146 | (MAX_SKB_FRAGS + 1); | |
1147 | linear = PAGE_SIZE - headroom; | |
1148 | } | |
e5374399 EC |
1149 | } |
1150 | skb = sock_alloc_send_pskb(sk, headroom + linear, len - linear, | |
1151 | noblock, &err, 0); | |
ed4ac422 | 1152 | if (!skb) |
bb664f49 | 1153 | goto out; |
e5374399 EC |
1154 | if (headroom) |
1155 | skb_reserve(skb, headroom); | |
1156 | skb_put(skb, linear); | |
1157 | skb->len = len; | |
1158 | skb->data_len = len - linear; | |
1159 | err = skb_copy_datagram_from_iter(skb, 0, &msg->msg_iter, len); | |
1160 | if (err) | |
bb664f49 | 1161 | goto fail; |
eac3731b | 1162 | |
0ea920d2 HB |
1163 | /* wait if outstanding messages for iucv path has reached */ |
1164 | timeo = sock_sndtimeo(sk, noblock); | |
1165 | err = iucv_sock_wait(sk, iucv_below_msglim(sk), timeo); | |
1166 | if (err) | |
1167 | goto fail; | |
eac3731b | 1168 | |
0ea920d2 HB |
1169 | /* return -ECONNRESET if the socket is no longer connected */ |
1170 | if (sk->sk_state != IUCV_CONNECTED) { | |
1171 | err = -ECONNRESET; | |
1172 | goto fail; | |
1173 | } | |
b8942e3b | 1174 | |
bb664f49 HB |
1175 | /* increment and save iucv message tag for msg_completion cbk */ |
1176 | txmsg.tag = iucv->send_tag++; | |
f9c41a62 | 1177 | IUCV_SKB_CB(skb)->tag = txmsg.tag; |
800c5eb7 | 1178 | |
3881ac44 UB |
1179 | if (iucv->transport == AF_IUCV_TRANS_HIPER) { |
1180 | atomic_inc(&iucv->msg_sent); | |
1181 | err = afiucv_hs_send(&txmsg, sk, skb, 0); | |
1182 | if (err) { | |
1183 | atomic_dec(&iucv->msg_sent); | |
7d149bf7 | 1184 | goto out; |
3881ac44 | 1185 | } |
e5374399 EC |
1186 | } else { /* Classic VM IUCV transport */ |
1187 | skb_queue_tail(&iucv->send_skb_q, skb); | |
1188 | ||
1189 | if (((iucv->path->flags & IUCV_IPRMDATA) & iucv->flags) && | |
1190 | skb->len <= 7) { | |
1191 | err = iucv_send_iprm(iucv->path, &txmsg, skb); | |
1192 | ||
1193 | /* on success: there is no message_complete callback */ | |
1194 | /* for an IPRMDATA msg; remove skb from send queue */ | |
1195 | if (err == 0) { | |
1196 | skb_unlink(skb, &iucv->send_skb_q); | |
1197 | kfree_skb(skb); | |
1198 | } | |
b8942e3b | 1199 | |
e5374399 EC |
1200 | /* this error should never happen since the */ |
1201 | /* IUCV_IPRMDATA path flag is set... sever path */ | |
1202 | if (err == 0x15) { | |
1203 | pr_iucv->path_sever(iucv->path, NULL); | |
1204 | skb_unlink(skb, &iucv->send_skb_q); | |
1205 | err = -EPIPE; | |
1206 | goto fail; | |
1207 | } | |
1208 | } else if (skb_is_nonlinear(skb)) { | |
1209 | struct iucv_array *iba = (struct iucv_array *)skb->head; | |
1210 | int i; | |
1211 | ||
1212 | /* skip iucv_array lying in the headroom */ | |
1213 | iba[0].address = (u32)(addr_t)skb->data; | |
1214 | iba[0].length = (u32)skb_headlen(skb); | |
1215 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1216 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1217 | ||
1218 | iba[i + 1].address = | |
1219 | (u32)(addr_t)skb_frag_address(frag); | |
1220 | iba[i + 1].length = (u32)skb_frag_size(frag); | |
1221 | } | |
1222 | err = pr_iucv->message_send(iucv->path, &txmsg, | |
1223 | IUCV_IPBUFLST, 0, | |
1224 | (void *)iba, skb->len); | |
1225 | } else { /* non-IPRM Linear skb */ | |
1226 | err = pr_iucv->message_send(iucv->path, &txmsg, | |
1227 | 0, 0, (void *)skb->data, skb->len); | |
bb664f49 | 1228 | } |
e5374399 EC |
1229 | if (err) { |
1230 | if (err == 3) { | |
1231 | user_id[8] = 0; | |
1232 | memcpy(user_id, iucv->dst_user_id, 8); | |
1233 | appl_id[8] = 0; | |
1234 | memcpy(appl_id, iucv->dst_name, 8); | |
1235 | pr_err( | |
1236 | "Application %s on z/VM guest %s exceeds message limit\n", | |
1237 | appl_id, user_id); | |
1238 | err = -EAGAIN; | |
1239 | } else { | |
1240 | err = -EPIPE; | |
1241 | } | |
eac3731b | 1242 | skb_unlink(skb, &iucv->send_skb_q); |
eac3731b JH |
1243 | goto fail; |
1244 | } | |
eac3731b JH |
1245 | } |
1246 | ||
1247 | release_sock(sk); | |
1248 | return len; | |
1249 | ||
1250 | fail: | |
1251 | kfree_skb(skb); | |
1252 | out: | |
1253 | release_sock(sk); | |
1254 | return err; | |
1255 | } | |
1256 | ||
a006353a EC |
1257 | static struct sk_buff *alloc_iucv_recv_skb(unsigned long len) |
1258 | { | |
1259 | size_t headroom, linear; | |
1260 | struct sk_buff *skb; | |
1261 | int err; | |
1262 | ||
1263 | if (len < PAGE_SIZE) { | |
1264 | headroom = 0; | |
1265 | linear = len; | |
1266 | } else { | |
1267 | headroom = sizeof(struct iucv_array) * (MAX_SKB_FRAGS + 1); | |
1268 | linear = PAGE_SIZE - headroom; | |
1269 | } | |
1270 | skb = alloc_skb_with_frags(headroom + linear, len - linear, | |
1271 | 0, &err, GFP_ATOMIC | GFP_DMA); | |
1272 | WARN_ONCE(!skb, | |
1273 | "alloc of recv iucv skb len=%lu failed with errcode=%d\n", | |
1274 | len, err); | |
1275 | if (skb) { | |
1276 | if (headroom) | |
1277 | skb_reserve(skb, headroom); | |
1278 | skb_put(skb, linear); | |
1279 | skb->len = len; | |
1280 | skb->data_len = len - linear; | |
1281 | } | |
1282 | return skb; | |
1283 | } | |
1284 | ||
bf95d20f HB |
1285 | /* iucv_process_message() - Receive a single outstanding IUCV message |
1286 | * | |
1287 | * Locking: must be called with message_q.lock held | |
1288 | */ | |
f0703c80 UB |
1289 | static void iucv_process_message(struct sock *sk, struct sk_buff *skb, |
1290 | struct iucv_path *path, | |
1291 | struct iucv_message *msg) | |
1292 | { | |
1293 | int rc; | |
b8942e3b HB |
1294 | unsigned int len; |
1295 | ||
1296 | len = iucv_msg_length(msg); | |
f0703c80 | 1297 | |
44b1e6b5 HB |
1298 | /* store msg target class in the second 4 bytes of skb ctrl buffer */ |
1299 | /* Note: the first 4 bytes are reserved for msg tag */ | |
f9c41a62 | 1300 | IUCV_SKB_CB(skb)->class = msg->class; |
44b1e6b5 | 1301 | |
b8942e3b HB |
1302 | /* check for special IPRM messages (e.g. iucv_sock_shutdown) */ |
1303 | if ((msg->flags & IUCV_IPRMDATA) && len > 7) { | |
1304 | if (memcmp(msg->rmmsg, iprm_shutdown, 8) == 0) { | |
1305 | skb->data = NULL; | |
1306 | skb->len = 0; | |
1307 | } | |
f0703c80 | 1308 | } else { |
a006353a EC |
1309 | if (skb_is_nonlinear(skb)) { |
1310 | struct iucv_array *iba = (struct iucv_array *)skb->head; | |
1311 | int i; | |
1312 | ||
1313 | iba[0].address = (u32)(addr_t)skb->data; | |
1314 | iba[0].length = (u32)skb_headlen(skb); | |
1315 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1316 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1317 | ||
1318 | iba[i + 1].address = | |
1319 | (u32)(addr_t)skb_frag_address(frag); | |
1320 | iba[i + 1].length = (u32)skb_frag_size(frag); | |
1321 | } | |
1322 | rc = pr_iucv->message_receive(path, msg, | |
1323 | IUCV_IPBUFLST, | |
1324 | (void *)iba, len, NULL); | |
1325 | } else { | |
1326 | rc = pr_iucv->message_receive(path, msg, | |
6fcd61f7 FB |
1327 | msg->flags & IUCV_IPRMDATA, |
1328 | skb->data, len, NULL); | |
a006353a | 1329 | } |
f0703c80 UB |
1330 | if (rc) { |
1331 | kfree_skb(skb); | |
1332 | return; | |
1333 | } | |
a006353a | 1334 | WARN_ON_ONCE(skb->len != len); |
f0703c80 UB |
1335 | } |
1336 | ||
f9c41a62 | 1337 | IUCV_SKB_CB(skb)->offset = 0; |
8c68b1a0 UB |
1338 | if (sk_filter(sk, skb)) { |
1339 | atomic_inc(&sk->sk_drops); /* skb rejected by filter */ | |
1340 | kfree_skb(skb); | |
1341 | return; | |
1342 | } | |
1343 | if (__sock_queue_rcv_skb(sk, skb)) /* handle rcv queue full */ | |
1344 | skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, skb); | |
f0703c80 UB |
1345 | } |
1346 | ||
bf95d20f HB |
1347 | /* iucv_process_message_q() - Process outstanding IUCV messages |
1348 | * | |
1349 | * Locking: must be called with message_q.lock held | |
1350 | */ | |
f0703c80 UB |
1351 | static void iucv_process_message_q(struct sock *sk) |
1352 | { | |
1353 | struct iucv_sock *iucv = iucv_sk(sk); | |
1354 | struct sk_buff *skb; | |
1355 | struct sock_msg_q *p, *n; | |
1356 | ||
1357 | list_for_each_entry_safe(p, n, &iucv->message_q.list, list) { | |
a006353a | 1358 | skb = alloc_iucv_recv_skb(iucv_msg_length(&p->msg)); |
f0703c80 UB |
1359 | if (!skb) |
1360 | break; | |
1361 | iucv_process_message(sk, skb, p->path, &p->msg); | |
1362 | list_del(&p->list); | |
1363 | kfree(p); | |
1364 | if (!skb_queue_empty(&iucv->backlog_skb_q)) | |
1365 | break; | |
1366 | } | |
1367 | } | |
1368 | ||
1b784140 YX |
1369 | static int iucv_sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1370 | size_t len, int flags) | |
eac3731b JH |
1371 | { |
1372 | int noblock = flags & MSG_DONTWAIT; | |
1373 | struct sock *sk = sock->sk; | |
561e0360 | 1374 | struct iucv_sock *iucv = iucv_sk(sk); |
aa8e71f5 | 1375 | unsigned int copied, rlen; |
9fbd87d4 | 1376 | struct sk_buff *skb, *rskb, *cskb; |
eac3731b | 1377 | int err = 0; |
f9c41a62 | 1378 | u32 offset; |
eac3731b | 1379 | |
aac6399c | 1380 | if ((sk->sk_state == IUCV_DISCONN) && |
f0703c80 UB |
1381 | skb_queue_empty(&iucv->backlog_skb_q) && |
1382 | skb_queue_empty(&sk->sk_receive_queue) && | |
1383 | list_empty(&iucv->message_q.list)) | |
561e0360 JH |
1384 | return 0; |
1385 | ||
eac3731b JH |
1386 | if (flags & (MSG_OOB)) |
1387 | return -EOPNOTSUPP; | |
1388 | ||
60d3705f HB |
1389 | /* receive/dequeue next skb: |
1390 | * the function understands MSG_PEEK and, thus, does not dequeue skb */ | |
eac3731b JH |
1391 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
1392 | if (!skb) { | |
1393 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
1394 | return 0; | |
1395 | return err; | |
1396 | } | |
1397 | ||
f9c41a62 UB |
1398 | offset = IUCV_SKB_CB(skb)->offset; |
1399 | rlen = skb->len - offset; /* real length of skb */ | |
aa8e71f5 | 1400 | copied = min_t(unsigned int, rlen, len); |
82492a35 UB |
1401 | if (!rlen) |
1402 | sk->sk_shutdown = sk->sk_shutdown | RCV_SHUTDOWN; | |
eac3731b | 1403 | |
561e0360 | 1404 | cskb = skb; |
51f3d02b | 1405 | if (skb_copy_datagram_msg(cskb, offset, msg, copied)) { |
802788bf HB |
1406 | if (!(flags & MSG_PEEK)) |
1407 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1408 | return -EFAULT; | |
eac3731b JH |
1409 | } |
1410 | ||
aa8e71f5 HB |
1411 | /* SOCK_SEQPACKET: set MSG_TRUNC if recv buf size is too small */ |
1412 | if (sk->sk_type == SOCK_SEQPACKET) { | |
1413 | if (copied < rlen) | |
1414 | msg->msg_flags |= MSG_TRUNC; | |
1415 | /* each iucv message contains a complete record */ | |
1416 | msg->msg_flags |= MSG_EOR; | |
1417 | } | |
eac3731b | 1418 | |
44b1e6b5 HB |
1419 | /* create control message to store iucv msg target class: |
1420 | * get the trgcls from the control buffer of the skb due to | |
1421 | * fragmentation of original iucv message. */ | |
1422 | err = put_cmsg(msg, SOL_IUCV, SCM_IUCV_TRGCLS, | |
f9c41a62 UB |
1423 | sizeof(IUCV_SKB_CB(skb)->class), |
1424 | (void *)&IUCV_SKB_CB(skb)->class); | |
44b1e6b5 HB |
1425 | if (err) { |
1426 | if (!(flags & MSG_PEEK)) | |
1427 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1428 | return err; | |
1429 | } | |
1430 | ||
eac3731b JH |
1431 | /* Mark read part of skb as used */ |
1432 | if (!(flags & MSG_PEEK)) { | |
eac3731b | 1433 | |
aa8e71f5 HB |
1434 | /* SOCK_STREAM: re-queue skb if it contains unreceived data */ |
1435 | if (sk->sk_type == SOCK_STREAM) { | |
f9c41a62 UB |
1436 | if (copied < rlen) { |
1437 | IUCV_SKB_CB(skb)->offset = offset + copied; | |
2f139a5d | 1438 | skb_queue_head(&sk->sk_receive_queue, skb); |
aa8e71f5 HB |
1439 | goto done; |
1440 | } | |
eac3731b JH |
1441 | } |
1442 | ||
1443 | kfree_skb(skb); | |
800c5eb7 UB |
1444 | if (iucv->transport == AF_IUCV_TRANS_HIPER) { |
1445 | atomic_inc(&iucv->msg_recv); | |
1446 | if (atomic_read(&iucv->msg_recv) > iucv->msglimit) { | |
1447 | WARN_ON(1); | |
1448 | iucv_sock_close(sk); | |
1449 | return -EFAULT; | |
1450 | } | |
1451 | } | |
561e0360 JH |
1452 | |
1453 | /* Queue backlog skbs */ | |
bf95d20f | 1454 | spin_lock_bh(&iucv->message_q.lock); |
f0703c80 | 1455 | rskb = skb_dequeue(&iucv->backlog_skb_q); |
da99f056 | 1456 | while (rskb) { |
f9c41a62 | 1457 | IUCV_SKB_CB(rskb)->offset = 0; |
8c68b1a0 UB |
1458 | if (__sock_queue_rcv_skb(sk, rskb)) { |
1459 | /* handle rcv queue full */ | |
f0703c80 | 1460 | skb_queue_head(&iucv->backlog_skb_q, |
561e0360 JH |
1461 | rskb); |
1462 | break; | |
561e0360 | 1463 | } |
8c68b1a0 | 1464 | rskb = skb_dequeue(&iucv->backlog_skb_q); |
561e0360 | 1465 | } |
f0703c80 | 1466 | if (skb_queue_empty(&iucv->backlog_skb_q)) { |
f0703c80 UB |
1467 | if (!list_empty(&iucv->message_q.list)) |
1468 | iucv_process_message_q(sk); | |
3881ac44 UB |
1469 | if (atomic_read(&iucv->msg_recv) >= |
1470 | iucv->msglimit / 2) { | |
9fbd87d4 | 1471 | err = iucv_send_ctrl(sk, AF_IUCV_FLAG_WIN); |
3881ac44 UB |
1472 | if (err) { |
1473 | sk->sk_state = IUCV_DISCONN; | |
1474 | sk->sk_state_change(sk); | |
1475 | } | |
1476 | } | |
f0703c80 | 1477 | } |
bf95d20f | 1478 | spin_unlock_bh(&iucv->message_q.lock); |
60d3705f | 1479 | } |
eac3731b JH |
1480 | |
1481 | done: | |
aa8e71f5 HB |
1482 | /* SOCK_SEQPACKET: return real length if MSG_TRUNC is set */ |
1483 | if (sk->sk_type == SOCK_SEQPACKET && (flags & MSG_TRUNC)) | |
1484 | copied = rlen; | |
1485 | ||
1486 | return copied; | |
eac3731b JH |
1487 | } |
1488 | ||
1489 | static inline unsigned int iucv_accept_poll(struct sock *parent) | |
1490 | { | |
1491 | struct iucv_sock *isk, *n; | |
1492 | struct sock *sk; | |
1493 | ||
da99f056 | 1494 | list_for_each_entry_safe(isk, n, &iucv_sk(parent)->accept_q, accept_q) { |
eac3731b JH |
1495 | sk = (struct sock *) isk; |
1496 | ||
1497 | if (sk->sk_state == IUCV_CONNECTED) | |
1498 | return POLLIN | POLLRDNORM; | |
1499 | } | |
1500 | ||
1501 | return 0; | |
1502 | } | |
1503 | ||
1504 | unsigned int iucv_sock_poll(struct file *file, struct socket *sock, | |
1505 | poll_table *wait) | |
1506 | { | |
1507 | struct sock *sk = sock->sk; | |
1508 | unsigned int mask = 0; | |
1509 | ||
aa395145 | 1510 | sock_poll_wait(file, sk_sleep(sk), wait); |
eac3731b JH |
1511 | |
1512 | if (sk->sk_state == IUCV_LISTEN) | |
1513 | return iucv_accept_poll(sk); | |
1514 | ||
1515 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
7d4c04fc | 1516 | mask |= POLLERR | |
8facd5fb | 1517 | (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0); |
eac3731b JH |
1518 | |
1519 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
1520 | mask |= POLLRDHUP; | |
1521 | ||
1522 | if (sk->sk_shutdown == SHUTDOWN_MASK) | |
1523 | mask |= POLLHUP; | |
1524 | ||
1525 | if (!skb_queue_empty(&sk->sk_receive_queue) || | |
da99f056 | 1526 | (sk->sk_shutdown & RCV_SHUTDOWN)) |
eac3731b JH |
1527 | mask |= POLLIN | POLLRDNORM; |
1528 | ||
1529 | if (sk->sk_state == IUCV_CLOSED) | |
1530 | mask |= POLLHUP; | |
1531 | ||
aac6399c | 1532 | if (sk->sk_state == IUCV_DISCONN) |
561e0360 JH |
1533 | mask |= POLLIN; |
1534 | ||
7f1b0ea4 | 1535 | if (sock_writeable(sk) && iucv_below_msglim(sk)) |
eac3731b JH |
1536 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; |
1537 | else | |
9cd3e072 | 1538 | sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk); |
eac3731b JH |
1539 | |
1540 | return mask; | |
1541 | } | |
1542 | ||
1543 | static int iucv_sock_shutdown(struct socket *sock, int how) | |
1544 | { | |
1545 | struct sock *sk = sock->sk; | |
1546 | struct iucv_sock *iucv = iucv_sk(sk); | |
1547 | struct iucv_message txmsg; | |
1548 | int err = 0; | |
eac3731b JH |
1549 | |
1550 | how++; | |
1551 | ||
1552 | if ((how & ~SHUTDOWN_MASK) || !how) | |
1553 | return -EINVAL; | |
1554 | ||
1555 | lock_sock(sk); | |
da99f056 | 1556 | switch (sk->sk_state) { |
82492a35 | 1557 | case IUCV_LISTEN: |
e14ad5fa HB |
1558 | case IUCV_DISCONN: |
1559 | case IUCV_CLOSING: | |
eac3731b JH |
1560 | case IUCV_CLOSED: |
1561 | err = -ENOTCONN; | |
1562 | goto fail; | |
eac3731b | 1563 | default: |
eac3731b JH |
1564 | break; |
1565 | } | |
1566 | ||
1567 | if (how == SEND_SHUTDOWN || how == SHUTDOWN_MASK) { | |
82492a35 UB |
1568 | if (iucv->transport == AF_IUCV_TRANS_IUCV) { |
1569 | txmsg.class = 0; | |
1570 | txmsg.tag = 0; | |
1571 | err = pr_iucv->message_send(iucv->path, &txmsg, | |
1572 | IUCV_IPRMDATA, 0, (void *) iprm_shutdown, 8); | |
1573 | if (err) { | |
1574 | switch (err) { | |
1575 | case 1: | |
1576 | err = -ENOTCONN; | |
1577 | break; | |
1578 | case 2: | |
1579 | err = -ECONNRESET; | |
1580 | break; | |
1581 | default: | |
1582 | err = -ENOTCONN; | |
1583 | break; | |
1584 | } | |
eac3731b | 1585 | } |
82492a35 UB |
1586 | } else |
1587 | iucv_send_ctrl(sk, AF_IUCV_FLAG_SHT); | |
eac3731b JH |
1588 | } |
1589 | ||
82492a35 | 1590 | sk->sk_shutdown |= how; |
eac3731b | 1591 | if (how == RCV_SHUTDOWN || how == SHUTDOWN_MASK) { |
1042cab8 UB |
1592 | if ((iucv->transport == AF_IUCV_TRANS_IUCV) && |
1593 | iucv->path) { | |
82492a35 UB |
1594 | err = pr_iucv->path_quiesce(iucv->path, NULL); |
1595 | if (err) | |
1596 | err = -ENOTCONN; | |
1597 | /* skb_queue_purge(&sk->sk_receive_queue); */ | |
1598 | } | |
eac3731b JH |
1599 | skb_queue_purge(&sk->sk_receive_queue); |
1600 | } | |
1601 | ||
1602 | /* Wake up anyone sleeping in poll */ | |
1603 | sk->sk_state_change(sk); | |
1604 | ||
1605 | fail: | |
1606 | release_sock(sk); | |
1607 | return err; | |
1608 | } | |
1609 | ||
1610 | static int iucv_sock_release(struct socket *sock) | |
1611 | { | |
1612 | struct sock *sk = sock->sk; | |
1613 | int err = 0; | |
1614 | ||
1615 | if (!sk) | |
1616 | return 0; | |
1617 | ||
1618 | iucv_sock_close(sk); | |
1619 | ||
eac3731b JH |
1620 | sock_orphan(sk); |
1621 | iucv_sock_kill(sk); | |
1622 | return err; | |
1623 | } | |
1624 | ||
9d5c5d8f HB |
1625 | /* getsockopt and setsockopt */ |
1626 | static int iucv_sock_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 1627 | char __user *optval, unsigned int optlen) |
9d5c5d8f HB |
1628 | { |
1629 | struct sock *sk = sock->sk; | |
1630 | struct iucv_sock *iucv = iucv_sk(sk); | |
1631 | int val; | |
1632 | int rc; | |
1633 | ||
1634 | if (level != SOL_IUCV) | |
1635 | return -ENOPROTOOPT; | |
1636 | ||
1637 | if (optlen < sizeof(int)) | |
1638 | return -EINVAL; | |
1639 | ||
1640 | if (get_user(val, (int __user *) optval)) | |
1641 | return -EFAULT; | |
1642 | ||
1643 | rc = 0; | |
1644 | ||
1645 | lock_sock(sk); | |
1646 | switch (optname) { | |
1647 | case SO_IPRMDATA_MSG: | |
1648 | if (val) | |
1649 | iucv->flags |= IUCV_IPRMDATA; | |
1650 | else | |
1651 | iucv->flags &= ~IUCV_IPRMDATA; | |
1652 | break; | |
09488e2e HB |
1653 | case SO_MSGLIMIT: |
1654 | switch (sk->sk_state) { | |
1655 | case IUCV_OPEN: | |
1656 | case IUCV_BOUND: | |
1657 | if (val < 1 || val > (u16)(~0)) | |
1658 | rc = -EINVAL; | |
1659 | else | |
1660 | iucv->msglimit = val; | |
1661 | break; | |
1662 | default: | |
1663 | rc = -EINVAL; | |
1664 | break; | |
1665 | } | |
1666 | break; | |
9d5c5d8f HB |
1667 | default: |
1668 | rc = -ENOPROTOOPT; | |
1669 | break; | |
1670 | } | |
1671 | release_sock(sk); | |
1672 | ||
1673 | return rc; | |
1674 | } | |
1675 | ||
1676 | static int iucv_sock_getsockopt(struct socket *sock, int level, int optname, | |
1677 | char __user *optval, int __user *optlen) | |
1678 | { | |
1679 | struct sock *sk = sock->sk; | |
1680 | struct iucv_sock *iucv = iucv_sk(sk); | |
51363b87 UB |
1681 | unsigned int val; |
1682 | int len; | |
9d5c5d8f HB |
1683 | |
1684 | if (level != SOL_IUCV) | |
1685 | return -ENOPROTOOPT; | |
1686 | ||
1687 | if (get_user(len, optlen)) | |
1688 | return -EFAULT; | |
1689 | ||
1690 | if (len < 0) | |
1691 | return -EINVAL; | |
1692 | ||
1693 | len = min_t(unsigned int, len, sizeof(int)); | |
1694 | ||
1695 | switch (optname) { | |
1696 | case SO_IPRMDATA_MSG: | |
1697 | val = (iucv->flags & IUCV_IPRMDATA) ? 1 : 0; | |
1698 | break; | |
09488e2e HB |
1699 | case SO_MSGLIMIT: |
1700 | lock_sock(sk); | |
1701 | val = (iucv->path != NULL) ? iucv->path->msglim /* connected */ | |
1702 | : iucv->msglimit; /* default */ | |
1703 | release_sock(sk); | |
1704 | break; | |
51363b87 UB |
1705 | case SO_MSGSIZE: |
1706 | if (sk->sk_state == IUCV_OPEN) | |
1707 | return -EBADFD; | |
1708 | val = (iucv->hs_dev) ? iucv->hs_dev->mtu - | |
1709 | sizeof(struct af_iucv_trans_hdr) - ETH_HLEN : | |
1710 | 0x7fffffff; | |
1711 | break; | |
9d5c5d8f HB |
1712 | default: |
1713 | return -ENOPROTOOPT; | |
1714 | } | |
1715 | ||
1716 | if (put_user(len, optlen)) | |
1717 | return -EFAULT; | |
1718 | if (copy_to_user(optval, &val, len)) | |
1719 | return -EFAULT; | |
1720 | ||
1721 | return 0; | |
1722 | } | |
1723 | ||
1724 | ||
eac3731b JH |
1725 | /* Callback wrappers - called from iucv base support */ |
1726 | static int iucv_callback_connreq(struct iucv_path *path, | |
1727 | u8 ipvmid[8], u8 ipuser[16]) | |
1728 | { | |
1729 | unsigned char user_data[16]; | |
1730 | unsigned char nuser_data[16]; | |
1731 | unsigned char src_name[8]; | |
eac3731b JH |
1732 | struct sock *sk, *nsk; |
1733 | struct iucv_sock *iucv, *niucv; | |
1734 | int err; | |
1735 | ||
1736 | memcpy(src_name, ipuser, 8); | |
1737 | EBCASC(src_name, 8); | |
1738 | /* Find out if this path belongs to af_iucv. */ | |
1739 | read_lock(&iucv_sk_list.lock); | |
1740 | iucv = NULL; | |
febca281 | 1741 | sk = NULL; |
b67bfe0d | 1742 | sk_for_each(sk, &iucv_sk_list.head) |
eac3731b JH |
1743 | if (sk->sk_state == IUCV_LISTEN && |
1744 | !memcmp(&iucv_sk(sk)->src_name, src_name, 8)) { | |
1745 | /* | |
1746 | * Found a listening socket with | |
1747 | * src_name == ipuser[0-7]. | |
1748 | */ | |
1749 | iucv = iucv_sk(sk); | |
1750 | break; | |
1751 | } | |
1752 | read_unlock(&iucv_sk_list.lock); | |
1753 | if (!iucv) | |
1754 | /* No socket found, not one of our paths. */ | |
1755 | return -EINVAL; | |
1756 | ||
1757 | bh_lock_sock(sk); | |
1758 | ||
1759 | /* Check if parent socket is listening */ | |
1760 | low_nmcpy(user_data, iucv->src_name); | |
1761 | high_nmcpy(user_data, iucv->dst_name); | |
1762 | ASCEBC(user_data, sizeof(user_data)); | |
1763 | if (sk->sk_state != IUCV_LISTEN) { | |
6fcd61f7 | 1764 | err = pr_iucv->path_sever(path, user_data); |
65dbd7c2 | 1765 | iucv_path_free(path); |
eac3731b JH |
1766 | goto fail; |
1767 | } | |
1768 | ||
1769 | /* Check for backlog size */ | |
1770 | if (sk_acceptq_is_full(sk)) { | |
6fcd61f7 | 1771 | err = pr_iucv->path_sever(path, user_data); |
65dbd7c2 | 1772 | iucv_path_free(path); |
eac3731b JH |
1773 | goto fail; |
1774 | } | |
1775 | ||
1776 | /* Create the new socket */ | |
11aa9c28 | 1777 | nsk = iucv_sock_alloc(NULL, sk->sk_type, GFP_ATOMIC, 0); |
da99f056 | 1778 | if (!nsk) { |
6fcd61f7 | 1779 | err = pr_iucv->path_sever(path, user_data); |
65dbd7c2 | 1780 | iucv_path_free(path); |
eac3731b JH |
1781 | goto fail; |
1782 | } | |
1783 | ||
1784 | niucv = iucv_sk(nsk); | |
1785 | iucv_sock_init(nsk, sk); | |
1786 | ||
1787 | /* Set the new iucv_sock */ | |
1788 | memcpy(niucv->dst_name, ipuser + 8, 8); | |
1789 | EBCASC(niucv->dst_name, 8); | |
1790 | memcpy(niucv->dst_user_id, ipvmid, 8); | |
1791 | memcpy(niucv->src_name, iucv->src_name, 8); | |
1792 | memcpy(niucv->src_user_id, iucv->src_user_id, 8); | |
1793 | niucv->path = path; | |
1794 | ||
1795 | /* Call iucv_accept */ | |
1796 | high_nmcpy(nuser_data, ipuser + 8); | |
1797 | memcpy(nuser_data + 8, niucv->src_name, 8); | |
1798 | ASCEBC(nuser_data + 8, 8); | |
1799 | ||
09488e2e HB |
1800 | /* set message limit for path based on msglimit of accepting socket */ |
1801 | niucv->msglimit = iucv->msglimit; | |
1802 | path->msglim = iucv->msglimit; | |
6fcd61f7 | 1803 | err = pr_iucv->path_accept(path, &af_iucv_handler, nuser_data, nsk); |
da99f056 | 1804 | if (err) { |
7d316b94 | 1805 | iucv_sever_path(nsk, 1); |
65dbd7c2 | 1806 | iucv_sock_kill(nsk); |
eac3731b JH |
1807 | goto fail; |
1808 | } | |
1809 | ||
1810 | iucv_accept_enqueue(sk, nsk); | |
1811 | ||
1812 | /* Wake up accept */ | |
1813 | nsk->sk_state = IUCV_CONNECTED; | |
676d2369 | 1814 | sk->sk_data_ready(sk); |
eac3731b JH |
1815 | err = 0; |
1816 | fail: | |
1817 | bh_unlock_sock(sk); | |
1818 | return 0; | |
1819 | } | |
1820 | ||
1821 | static void iucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) | |
1822 | { | |
1823 | struct sock *sk = path->private; | |
1824 | ||
1825 | sk->sk_state = IUCV_CONNECTED; | |
1826 | sk->sk_state_change(sk); | |
1827 | } | |
1828 | ||
1829 | static void iucv_callback_rx(struct iucv_path *path, struct iucv_message *msg) | |
1830 | { | |
1831 | struct sock *sk = path->private; | |
561e0360 | 1832 | struct iucv_sock *iucv = iucv_sk(sk); |
f0703c80 UB |
1833 | struct sk_buff *skb; |
1834 | struct sock_msg_q *save_msg; | |
1835 | int len; | |
561e0360 | 1836 | |
fe86e54e | 1837 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
6fcd61f7 | 1838 | pr_iucv->message_reject(path, msg); |
eac3731b | 1839 | return; |
fe86e54e | 1840 | } |
eac3731b | 1841 | |
3fa6b5ad | 1842 | spin_lock(&iucv->message_q.lock); |
eac3731b | 1843 | |
f0703c80 UB |
1844 | if (!list_empty(&iucv->message_q.list) || |
1845 | !skb_queue_empty(&iucv->backlog_skb_q)) | |
1846 | goto save_message; | |
1847 | ||
1848 | len = atomic_read(&sk->sk_rmem_alloc); | |
87fb4b7b | 1849 | len += SKB_TRUESIZE(iucv_msg_length(msg)); |
f0703c80 UB |
1850 | if (len > sk->sk_rcvbuf) |
1851 | goto save_message; | |
1852 | ||
a006353a | 1853 | skb = alloc_iucv_recv_skb(iucv_msg_length(msg)); |
f0703c80 UB |
1854 | if (!skb) |
1855 | goto save_message; | |
eac3731b | 1856 | |
f0703c80 | 1857 | iucv_process_message(sk, skb, path, msg); |
3fa6b5ad | 1858 | goto out_unlock; |
eac3731b | 1859 | |
f0703c80 UB |
1860 | save_message: |
1861 | save_msg = kzalloc(sizeof(struct sock_msg_q), GFP_ATOMIC | GFP_DMA); | |
d4444722 | 1862 | if (!save_msg) |
a56635a5 | 1863 | goto out_unlock; |
f0703c80 UB |
1864 | save_msg->path = path; |
1865 | save_msg->msg = *msg; | |
eac3731b | 1866 | |
f0703c80 | 1867 | list_add_tail(&save_msg->list, &iucv->message_q.list); |
3fa6b5ad HB |
1868 | |
1869 | out_unlock: | |
f0703c80 | 1870 | spin_unlock(&iucv->message_q.lock); |
eac3731b JH |
1871 | } |
1872 | ||
1873 | static void iucv_callback_txdone(struct iucv_path *path, | |
1874 | struct iucv_message *msg) | |
1875 | { | |
1876 | struct sock *sk = path->private; | |
f2a77991 | 1877 | struct sk_buff *this = NULL; |
eac3731b JH |
1878 | struct sk_buff_head *list = &iucv_sk(sk)->send_skb_q; |
1879 | struct sk_buff *list_skb = list->next; | |
1880 | unsigned long flags; | |
1881 | ||
7d316b94 | 1882 | bh_lock_sock(sk); |
f2a77991 | 1883 | if (!skb_queue_empty(list)) { |
561e0360 JH |
1884 | spin_lock_irqsave(&list->lock, flags); |
1885 | ||
f2a77991 | 1886 | while (list_skb != (struct sk_buff *)list) { |
f5738e2e | 1887 | if (msg->tag == IUCV_SKB_CB(list_skb)->tag) { |
f2a77991 UB |
1888 | this = list_skb; |
1889 | break; | |
1890 | } | |
561e0360 | 1891 | list_skb = list_skb->next; |
f2a77991 UB |
1892 | } |
1893 | if (this) | |
1894 | __skb_unlink(this, list); | |
561e0360 JH |
1895 | |
1896 | spin_unlock_irqrestore(&list->lock, flags); | |
eac3731b | 1897 | |
0ea920d2 HB |
1898 | if (this) { |
1899 | kfree_skb(this); | |
1900 | /* wake up any process waiting for sending */ | |
1901 | iucv_sock_wake_msglim(sk); | |
1902 | } | |
561e0360 | 1903 | } |
eac3731b | 1904 | |
da99f056 | 1905 | if (sk->sk_state == IUCV_CLOSING) { |
561e0360 JH |
1906 | if (skb_queue_empty(&iucv_sk(sk)->send_skb_q)) { |
1907 | sk->sk_state = IUCV_CLOSED; | |
1908 | sk->sk_state_change(sk); | |
1909 | } | |
1910 | } | |
7d316b94 | 1911 | bh_unlock_sock(sk); |
eac3731b | 1912 | |
eac3731b JH |
1913 | } |
1914 | ||
1915 | static void iucv_callback_connrej(struct iucv_path *path, u8 ipuser[16]) | |
1916 | { | |
1917 | struct sock *sk = path->private; | |
1918 | ||
7d316b94 UB |
1919 | if (sk->sk_state == IUCV_CLOSED) |
1920 | return; | |
1921 | ||
1922 | bh_lock_sock(sk); | |
1923 | iucv_sever_path(sk, 1); | |
aac6399c | 1924 | sk->sk_state = IUCV_DISCONN; |
eac3731b JH |
1925 | |
1926 | sk->sk_state_change(sk); | |
7d316b94 | 1927 | bh_unlock_sock(sk); |
eac3731b JH |
1928 | } |
1929 | ||
af88b52d HB |
1930 | /* called if the other communication side shuts down its RECV direction; |
1931 | * in turn, the callback sets SEND_SHUTDOWN to disable sending of data. | |
1932 | */ | |
1933 | static void iucv_callback_shutdown(struct iucv_path *path, u8 ipuser[16]) | |
1934 | { | |
1935 | struct sock *sk = path->private; | |
1936 | ||
1937 | bh_lock_sock(sk); | |
1938 | if (sk->sk_state != IUCV_CLOSED) { | |
1939 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
1940 | sk->sk_state_change(sk); | |
1941 | } | |
1942 | bh_unlock_sock(sk); | |
1943 | } | |
1944 | ||
3881ac44 UB |
1945 | /***************** HiperSockets transport callbacks ********************/ |
1946 | static void afiucv_swap_src_dest(struct sk_buff *skb) | |
1947 | { | |
1948 | struct af_iucv_trans_hdr *trans_hdr = | |
1949 | (struct af_iucv_trans_hdr *)skb->data; | |
1950 | char tmpID[8]; | |
1951 | char tmpName[8]; | |
1952 | ||
1953 | ASCEBC(trans_hdr->destUserID, sizeof(trans_hdr->destUserID)); | |
1954 | ASCEBC(trans_hdr->destAppName, sizeof(trans_hdr->destAppName)); | |
1955 | ASCEBC(trans_hdr->srcUserID, sizeof(trans_hdr->srcUserID)); | |
1956 | ASCEBC(trans_hdr->srcAppName, sizeof(trans_hdr->srcAppName)); | |
1957 | memcpy(tmpID, trans_hdr->srcUserID, 8); | |
1958 | memcpy(tmpName, trans_hdr->srcAppName, 8); | |
1959 | memcpy(trans_hdr->srcUserID, trans_hdr->destUserID, 8); | |
1960 | memcpy(trans_hdr->srcAppName, trans_hdr->destAppName, 8); | |
1961 | memcpy(trans_hdr->destUserID, tmpID, 8); | |
1962 | memcpy(trans_hdr->destAppName, tmpName, 8); | |
1963 | skb_push(skb, ETH_HLEN); | |
1964 | memset(skb->data, 0, ETH_HLEN); | |
1965 | } | |
1966 | ||
1967 | /** | |
1968 | * afiucv_hs_callback_syn - react on received SYN | |
1969 | **/ | |
1970 | static int afiucv_hs_callback_syn(struct sock *sk, struct sk_buff *skb) | |
1971 | { | |
1972 | struct sock *nsk; | |
1973 | struct iucv_sock *iucv, *niucv; | |
1974 | struct af_iucv_trans_hdr *trans_hdr; | |
1975 | int err; | |
1976 | ||
1977 | iucv = iucv_sk(sk); | |
1978 | trans_hdr = (struct af_iucv_trans_hdr *)skb->data; | |
1979 | if (!iucv) { | |
1980 | /* no sock - connection refused */ | |
1981 | afiucv_swap_src_dest(skb); | |
1982 | trans_hdr->flags = AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_FIN; | |
1983 | err = dev_queue_xmit(skb); | |
1984 | goto out; | |
1985 | } | |
1986 | ||
11aa9c28 | 1987 | nsk = iucv_sock_alloc(NULL, sk->sk_type, GFP_ATOMIC, 0); |
3881ac44 UB |
1988 | bh_lock_sock(sk); |
1989 | if ((sk->sk_state != IUCV_LISTEN) || | |
1990 | sk_acceptq_is_full(sk) || | |
1991 | !nsk) { | |
1992 | /* error on server socket - connection refused */ | |
3881ac44 UB |
1993 | afiucv_swap_src_dest(skb); |
1994 | trans_hdr->flags = AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_FIN; | |
1995 | err = dev_queue_xmit(skb); | |
4d520f62 | 1996 | iucv_sock_kill(nsk); |
3881ac44 UB |
1997 | bh_unlock_sock(sk); |
1998 | goto out; | |
1999 | } | |
2000 | ||
2001 | niucv = iucv_sk(nsk); | |
2002 | iucv_sock_init(nsk, sk); | |
2003 | niucv->transport = AF_IUCV_TRANS_HIPER; | |
2004 | niucv->msglimit = iucv->msglimit; | |
2005 | if (!trans_hdr->window) | |
2006 | niucv->msglimit_peer = IUCV_HIPER_MSGLIM_DEFAULT; | |
2007 | else | |
2008 | niucv->msglimit_peer = trans_hdr->window; | |
2009 | memcpy(niucv->dst_name, trans_hdr->srcAppName, 8); | |
2010 | memcpy(niucv->dst_user_id, trans_hdr->srcUserID, 8); | |
2011 | memcpy(niucv->src_name, iucv->src_name, 8); | |
2012 | memcpy(niucv->src_user_id, iucv->src_user_id, 8); | |
2013 | nsk->sk_bound_dev_if = sk->sk_bound_dev_if; | |
800c5eb7 UB |
2014 | niucv->hs_dev = iucv->hs_dev; |
2015 | dev_hold(niucv->hs_dev); | |
3881ac44 UB |
2016 | afiucv_swap_src_dest(skb); |
2017 | trans_hdr->flags = AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_ACK; | |
2018 | trans_hdr->window = niucv->msglimit; | |
2019 | /* if receiver acks the xmit connection is established */ | |
2020 | err = dev_queue_xmit(skb); | |
2021 | if (!err) { | |
2022 | iucv_accept_enqueue(sk, nsk); | |
2023 | nsk->sk_state = IUCV_CONNECTED; | |
676d2369 | 2024 | sk->sk_data_ready(sk); |
3881ac44 UB |
2025 | } else |
2026 | iucv_sock_kill(nsk); | |
2027 | bh_unlock_sock(sk); | |
2028 | ||
2029 | out: | |
2030 | return NET_RX_SUCCESS; | |
2031 | } | |
2032 | ||
2033 | /** | |
2034 | * afiucv_hs_callback_synack() - react on received SYN-ACK | |
2035 | **/ | |
2036 | static int afiucv_hs_callback_synack(struct sock *sk, struct sk_buff *skb) | |
2037 | { | |
2038 | struct iucv_sock *iucv = iucv_sk(sk); | |
2039 | struct af_iucv_trans_hdr *trans_hdr = | |
2040 | (struct af_iucv_trans_hdr *)skb->data; | |
2041 | ||
2042 | if (!iucv) | |
2043 | goto out; | |
2044 | if (sk->sk_state != IUCV_BOUND) | |
2045 | goto out; | |
2046 | bh_lock_sock(sk); | |
2047 | iucv->msglimit_peer = trans_hdr->window; | |
2048 | sk->sk_state = IUCV_CONNECTED; | |
2049 | sk->sk_state_change(sk); | |
2050 | bh_unlock_sock(sk); | |
2051 | out: | |
2052 | kfree_skb(skb); | |
2053 | return NET_RX_SUCCESS; | |
2054 | } | |
2055 | ||
2056 | /** | |
2057 | * afiucv_hs_callback_synfin() - react on received SYN_FIN | |
2058 | **/ | |
2059 | static int afiucv_hs_callback_synfin(struct sock *sk, struct sk_buff *skb) | |
2060 | { | |
2061 | struct iucv_sock *iucv = iucv_sk(sk); | |
2062 | ||
2063 | if (!iucv) | |
2064 | goto out; | |
2065 | if (sk->sk_state != IUCV_BOUND) | |
2066 | goto out; | |
2067 | bh_lock_sock(sk); | |
2068 | sk->sk_state = IUCV_DISCONN; | |
2069 | sk->sk_state_change(sk); | |
2070 | bh_unlock_sock(sk); | |
2071 | out: | |
2072 | kfree_skb(skb); | |
2073 | return NET_RX_SUCCESS; | |
2074 | } | |
2075 | ||
2076 | /** | |
2077 | * afiucv_hs_callback_fin() - react on received FIN | |
2078 | **/ | |
2079 | static int afiucv_hs_callback_fin(struct sock *sk, struct sk_buff *skb) | |
2080 | { | |
2081 | struct iucv_sock *iucv = iucv_sk(sk); | |
2082 | ||
2083 | /* other end of connection closed */ | |
800c5eb7 UB |
2084 | if (!iucv) |
2085 | goto out; | |
2086 | bh_lock_sock(sk); | |
2087 | if (sk->sk_state == IUCV_CONNECTED) { | |
aac6399c | 2088 | sk->sk_state = IUCV_DISCONN; |
3881ac44 | 2089 | sk->sk_state_change(sk); |
3881ac44 | 2090 | } |
800c5eb7 UB |
2091 | bh_unlock_sock(sk); |
2092 | out: | |
3881ac44 UB |
2093 | kfree_skb(skb); |
2094 | return NET_RX_SUCCESS; | |
2095 | } | |
2096 | ||
2097 | /** | |
2098 | * afiucv_hs_callback_win() - react on received WIN | |
2099 | **/ | |
2100 | static int afiucv_hs_callback_win(struct sock *sk, struct sk_buff *skb) | |
2101 | { | |
2102 | struct iucv_sock *iucv = iucv_sk(sk); | |
2103 | struct af_iucv_trans_hdr *trans_hdr = | |
2104 | (struct af_iucv_trans_hdr *)skb->data; | |
2105 | ||
2106 | if (!iucv) | |
2107 | return NET_RX_SUCCESS; | |
2108 | ||
2109 | if (sk->sk_state != IUCV_CONNECTED) | |
2110 | return NET_RX_SUCCESS; | |
2111 | ||
2112 | atomic_sub(trans_hdr->window, &iucv->msg_sent); | |
2113 | iucv_sock_wake_msglim(sk); | |
2114 | return NET_RX_SUCCESS; | |
2115 | } | |
2116 | ||
2117 | /** | |
2118 | * afiucv_hs_callback_rx() - react on received data | |
2119 | **/ | |
2120 | static int afiucv_hs_callback_rx(struct sock *sk, struct sk_buff *skb) | |
2121 | { | |
2122 | struct iucv_sock *iucv = iucv_sk(sk); | |
2123 | ||
2124 | if (!iucv) { | |
2125 | kfree_skb(skb); | |
2126 | return NET_RX_SUCCESS; | |
2127 | } | |
2128 | ||
2129 | if (sk->sk_state != IUCV_CONNECTED) { | |
2130 | kfree_skb(skb); | |
2131 | return NET_RX_SUCCESS; | |
2132 | } | |
2133 | ||
82492a35 UB |
2134 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
2135 | kfree_skb(skb); | |
2136 | return NET_RX_SUCCESS; | |
2137 | } | |
2138 | ||
979f66b3 | 2139 | /* write stuff from iucv_msg to skb cb */ |
3881ac44 UB |
2140 | skb_pull(skb, sizeof(struct af_iucv_trans_hdr)); |
2141 | skb_reset_transport_header(skb); | |
2142 | skb_reset_network_header(skb); | |
f9c41a62 | 2143 | IUCV_SKB_CB(skb)->offset = 0; |
8c68b1a0 UB |
2144 | if (sk_filter(sk, skb)) { |
2145 | atomic_inc(&sk->sk_drops); /* skb rejected by filter */ | |
2146 | kfree_skb(skb); | |
2147 | return NET_RX_SUCCESS; | |
2148 | } | |
2149 | ||
3881ac44 UB |
2150 | spin_lock(&iucv->message_q.lock); |
2151 | if (skb_queue_empty(&iucv->backlog_skb_q)) { | |
8c68b1a0 | 2152 | if (__sock_queue_rcv_skb(sk, skb)) |
3881ac44 UB |
2153 | /* handle rcv queue full */ |
2154 | skb_queue_tail(&iucv->backlog_skb_q, skb); | |
3881ac44 UB |
2155 | } else |
2156 | skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, skb); | |
2157 | spin_unlock(&iucv->message_q.lock); | |
2158 | return NET_RX_SUCCESS; | |
2159 | } | |
2160 | ||
2161 | /** | |
2162 | * afiucv_hs_rcv() - base function for arriving data through HiperSockets | |
2163 | * transport | |
2164 | * called from netif RX softirq | |
2165 | **/ | |
2166 | static int afiucv_hs_rcv(struct sk_buff *skb, struct net_device *dev, | |
2167 | struct packet_type *pt, struct net_device *orig_dev) | |
2168 | { | |
3881ac44 UB |
2169 | struct sock *sk; |
2170 | struct iucv_sock *iucv; | |
2171 | struct af_iucv_trans_hdr *trans_hdr; | |
61f846bc | 2172 | int err = NET_RX_SUCCESS; |
3881ac44 | 2173 | char nullstring[8]; |
3881ac44 | 2174 | |
979f66b3 EC |
2175 | if (skb->len < (ETH_HLEN + sizeof(struct af_iucv_trans_hdr))) { |
2176 | WARN_ONCE(1, "AF_IUCV too short skb, len=%d, min=%d", | |
2177 | (int)skb->len, | |
2178 | (int)(ETH_HLEN + sizeof(struct af_iucv_trans_hdr))); | |
2179 | kfree_skb(skb); | |
2180 | return NET_RX_SUCCESS; | |
2181 | } | |
2182 | if (skb_headlen(skb) < (ETH_HLEN + sizeof(struct af_iucv_trans_hdr))) | |
2183 | if (skb_linearize(skb)) { | |
2184 | WARN_ONCE(1, "AF_IUCV skb_linearize failed, len=%d", | |
2185 | (int)skb->len); | |
2186 | kfree_skb(skb); | |
2187 | return NET_RX_SUCCESS; | |
2188 | } | |
3881ac44 UB |
2189 | skb_pull(skb, ETH_HLEN); |
2190 | trans_hdr = (struct af_iucv_trans_hdr *)skb->data; | |
2191 | EBCASC(trans_hdr->destAppName, sizeof(trans_hdr->destAppName)); | |
2192 | EBCASC(trans_hdr->destUserID, sizeof(trans_hdr->destUserID)); | |
2193 | EBCASC(trans_hdr->srcAppName, sizeof(trans_hdr->srcAppName)); | |
2194 | EBCASC(trans_hdr->srcUserID, sizeof(trans_hdr->srcUserID)); | |
2195 | memset(nullstring, 0, sizeof(nullstring)); | |
2196 | iucv = NULL; | |
2197 | sk = NULL; | |
2198 | read_lock(&iucv_sk_list.lock); | |
b67bfe0d | 2199 | sk_for_each(sk, &iucv_sk_list.head) { |
3881ac44 UB |
2200 | if (trans_hdr->flags == AF_IUCV_FLAG_SYN) { |
2201 | if ((!memcmp(&iucv_sk(sk)->src_name, | |
2202 | trans_hdr->destAppName, 8)) && | |
2203 | (!memcmp(&iucv_sk(sk)->src_user_id, | |
2204 | trans_hdr->destUserID, 8)) && | |
2205 | (!memcmp(&iucv_sk(sk)->dst_name, nullstring, 8)) && | |
2206 | (!memcmp(&iucv_sk(sk)->dst_user_id, | |
2207 | nullstring, 8))) { | |
2208 | iucv = iucv_sk(sk); | |
2209 | break; | |
2210 | } | |
2211 | } else { | |
2212 | if ((!memcmp(&iucv_sk(sk)->src_name, | |
2213 | trans_hdr->destAppName, 8)) && | |
2214 | (!memcmp(&iucv_sk(sk)->src_user_id, | |
2215 | trans_hdr->destUserID, 8)) && | |
2216 | (!memcmp(&iucv_sk(sk)->dst_name, | |
2217 | trans_hdr->srcAppName, 8)) && | |
2218 | (!memcmp(&iucv_sk(sk)->dst_user_id, | |
2219 | trans_hdr->srcUserID, 8))) { | |
2220 | iucv = iucv_sk(sk); | |
2221 | break; | |
2222 | } | |
2223 | } | |
2224 | } | |
2225 | read_unlock(&iucv_sk_list.lock); | |
2226 | if (!iucv) | |
2227 | sk = NULL; | |
2228 | ||
2229 | /* no sock | |
2230 | how should we send with no sock | |
2231 | 1) send without sock no send rc checking? | |
2232 | 2) introduce default sock to handle this cases | |
2233 | ||
2234 | SYN -> send SYN|ACK in good case, send SYN|FIN in bad case | |
2235 | data -> send FIN | |
2236 | SYN|ACK, SYN|FIN, FIN -> no action? */ | |
2237 | ||
2238 | switch (trans_hdr->flags) { | |
2239 | case AF_IUCV_FLAG_SYN: | |
2240 | /* connect request */ | |
2241 | err = afiucv_hs_callback_syn(sk, skb); | |
2242 | break; | |
2243 | case (AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_ACK): | |
2244 | /* connect request confirmed */ | |
2245 | err = afiucv_hs_callback_synack(sk, skb); | |
2246 | break; | |
2247 | case (AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_FIN): | |
2248 | /* connect request refused */ | |
2249 | err = afiucv_hs_callback_synfin(sk, skb); | |
2250 | break; | |
2251 | case (AF_IUCV_FLAG_FIN): | |
2252 | /* close request */ | |
2253 | err = afiucv_hs_callback_fin(sk, skb); | |
2254 | break; | |
2255 | case (AF_IUCV_FLAG_WIN): | |
2256 | err = afiucv_hs_callback_win(sk, skb); | |
800c5eb7 UB |
2257 | if (skb->len == sizeof(struct af_iucv_trans_hdr)) { |
2258 | kfree_skb(skb); | |
2259 | break; | |
2260 | } | |
82492a35 UB |
2261 | /* fall through and receive non-zero length data */ |
2262 | case (AF_IUCV_FLAG_SHT): | |
2263 | /* shutdown request */ | |
2264 | /* fall through and receive zero length data */ | |
3881ac44 UB |
2265 | case 0: |
2266 | /* plain data frame */ | |
f9c41a62 | 2267 | IUCV_SKB_CB(skb)->class = trans_hdr->iucv_hdr.class; |
3881ac44 UB |
2268 | err = afiucv_hs_callback_rx(sk, skb); |
2269 | break; | |
2270 | default: | |
61f846bc | 2271 | kfree_skb(skb); |
3881ac44 UB |
2272 | } |
2273 | ||
2274 | return err; | |
2275 | } | |
2276 | ||
2277 | /** | |
2278 | * afiucv_hs_callback_txnotify() - handle send notifcations from HiperSockets | |
2279 | * transport | |
2280 | **/ | |
2281 | static void afiucv_hs_callback_txnotify(struct sk_buff *skb, | |
2282 | enum iucv_tx_notify n) | |
2283 | { | |
2284 | struct sock *isk = skb->sk; | |
2285 | struct sock *sk = NULL; | |
2286 | struct iucv_sock *iucv = NULL; | |
2287 | struct sk_buff_head *list; | |
2288 | struct sk_buff *list_skb; | |
800c5eb7 | 2289 | struct sk_buff *nskb; |
3881ac44 | 2290 | unsigned long flags; |
3881ac44 | 2291 | |
800c5eb7 | 2292 | read_lock_irqsave(&iucv_sk_list.lock, flags); |
b67bfe0d | 2293 | sk_for_each(sk, &iucv_sk_list.head) |
3881ac44 UB |
2294 | if (sk == isk) { |
2295 | iucv = iucv_sk(sk); | |
2296 | break; | |
2297 | } | |
800c5eb7 | 2298 | read_unlock_irqrestore(&iucv_sk_list.lock, flags); |
3881ac44 | 2299 | |
800c5eb7 | 2300 | if (!iucv || sock_flag(sk, SOCK_ZAPPED)) |
3881ac44 UB |
2301 | return; |
2302 | ||
3881ac44 | 2303 | list = &iucv->send_skb_q; |
800c5eb7 | 2304 | spin_lock_irqsave(&list->lock, flags); |
3881ac44 UB |
2305 | if (skb_queue_empty(list)) |
2306 | goto out_unlock; | |
800c5eb7 UB |
2307 | list_skb = list->next; |
2308 | nskb = list_skb->next; | |
3881ac44 UB |
2309 | while (list_skb != (struct sk_buff *)list) { |
2310 | if (skb_shinfo(list_skb) == skb_shinfo(skb)) { | |
3881ac44 UB |
2311 | switch (n) { |
2312 | case TX_NOTIFY_OK: | |
800c5eb7 UB |
2313 | __skb_unlink(list_skb, list); |
2314 | kfree_skb(list_skb); | |
3881ac44 | 2315 | iucv_sock_wake_msglim(sk); |
3881ac44 UB |
2316 | break; |
2317 | case TX_NOTIFY_PENDING: | |
2318 | atomic_inc(&iucv->pendings); | |
2319 | break; | |
2320 | case TX_NOTIFY_DELAYED_OK: | |
800c5eb7 | 2321 | __skb_unlink(list_skb, list); |
3881ac44 UB |
2322 | atomic_dec(&iucv->pendings); |
2323 | if (atomic_read(&iucv->pendings) <= 0) | |
2324 | iucv_sock_wake_msglim(sk); | |
800c5eb7 | 2325 | kfree_skb(list_skb); |
3881ac44 UB |
2326 | break; |
2327 | case TX_NOTIFY_UNREACHABLE: | |
2328 | case TX_NOTIFY_DELAYED_UNREACHABLE: | |
2329 | case TX_NOTIFY_TPQFULL: /* not yet used */ | |
2330 | case TX_NOTIFY_GENERALERROR: | |
2331 | case TX_NOTIFY_DELAYED_GENERALERROR: | |
800c5eb7 UB |
2332 | __skb_unlink(list_skb, list); |
2333 | kfree_skb(list_skb); | |
2334 | if (sk->sk_state == IUCV_CONNECTED) { | |
2335 | sk->sk_state = IUCV_DISCONN; | |
2336 | sk->sk_state_change(sk); | |
2337 | } | |
3881ac44 UB |
2338 | break; |
2339 | } | |
2340 | break; | |
2341 | } | |
800c5eb7 UB |
2342 | list_skb = nskb; |
2343 | nskb = nskb->next; | |
3881ac44 | 2344 | } |
800c5eb7 | 2345 | out_unlock: |
3881ac44 UB |
2346 | spin_unlock_irqrestore(&list->lock, flags); |
2347 | ||
42bd48e0 UB |
2348 | if (sk->sk_state == IUCV_CLOSING) { |
2349 | if (skb_queue_empty(&iucv_sk(sk)->send_skb_q)) { | |
2350 | sk->sk_state = IUCV_CLOSED; | |
2351 | sk->sk_state_change(sk); | |
2352 | } | |
2353 | } | |
2354 | ||
3881ac44 | 2355 | } |
9fbd87d4 UB |
2356 | |
2357 | /* | |
2358 | * afiucv_netdev_event: handle netdev notifier chain events | |
2359 | */ | |
2360 | static int afiucv_netdev_event(struct notifier_block *this, | |
2361 | unsigned long event, void *ptr) | |
2362 | { | |
351638e7 | 2363 | struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); |
9fbd87d4 UB |
2364 | struct sock *sk; |
2365 | struct iucv_sock *iucv; | |
2366 | ||
2367 | switch (event) { | |
2368 | case NETDEV_REBOOT: | |
2369 | case NETDEV_GOING_DOWN: | |
b67bfe0d | 2370 | sk_for_each(sk, &iucv_sk_list.head) { |
9fbd87d4 UB |
2371 | iucv = iucv_sk(sk); |
2372 | if ((iucv->hs_dev == event_dev) && | |
2373 | (sk->sk_state == IUCV_CONNECTED)) { | |
2374 | if (event == NETDEV_GOING_DOWN) | |
2375 | iucv_send_ctrl(sk, AF_IUCV_FLAG_FIN); | |
2376 | sk->sk_state = IUCV_DISCONN; | |
2377 | sk->sk_state_change(sk); | |
2378 | } | |
2379 | } | |
2380 | break; | |
2381 | case NETDEV_DOWN: | |
2382 | case NETDEV_UNREGISTER: | |
2383 | default: | |
2384 | break; | |
2385 | } | |
2386 | return NOTIFY_DONE; | |
2387 | } | |
2388 | ||
2389 | static struct notifier_block afiucv_netdev_notifier = { | |
2390 | .notifier_call = afiucv_netdev_event, | |
2391 | }; | |
2392 | ||
5708e868 | 2393 | static const struct proto_ops iucv_sock_ops = { |
eac3731b JH |
2394 | .family = PF_IUCV, |
2395 | .owner = THIS_MODULE, | |
2396 | .release = iucv_sock_release, | |
2397 | .bind = iucv_sock_bind, | |
2398 | .connect = iucv_sock_connect, | |
2399 | .listen = iucv_sock_listen, | |
2400 | .accept = iucv_sock_accept, | |
2401 | .getname = iucv_sock_getname, | |
2402 | .sendmsg = iucv_sock_sendmsg, | |
2403 | .recvmsg = iucv_sock_recvmsg, | |
2404 | .poll = iucv_sock_poll, | |
2405 | .ioctl = sock_no_ioctl, | |
2406 | .mmap = sock_no_mmap, | |
2407 | .socketpair = sock_no_socketpair, | |
2408 | .shutdown = iucv_sock_shutdown, | |
9d5c5d8f HB |
2409 | .setsockopt = iucv_sock_setsockopt, |
2410 | .getsockopt = iucv_sock_getsockopt, | |
eac3731b JH |
2411 | }; |
2412 | ||
ec1b4cf7 | 2413 | static const struct net_proto_family iucv_sock_family_ops = { |
eac3731b JH |
2414 | .family = AF_IUCV, |
2415 | .owner = THIS_MODULE, | |
2416 | .create = iucv_sock_create, | |
2417 | }; | |
2418 | ||
3881ac44 UB |
2419 | static struct packet_type iucv_packet_type = { |
2420 | .type = cpu_to_be16(ETH_P_AF_IUCV), | |
2421 | .func = afiucv_hs_rcv, | |
2422 | }; | |
2423 | ||
2424 | static int afiucv_iucv_init(void) | |
6fcd61f7 FB |
2425 | { |
2426 | int err; | |
2427 | ||
2428 | err = pr_iucv->iucv_register(&af_iucv_handler, 0); | |
2429 | if (err) | |
2430 | goto out; | |
2431 | /* establish dummy device */ | |
2432 | af_iucv_driver.bus = pr_iucv->bus; | |
2433 | err = driver_register(&af_iucv_driver); | |
2434 | if (err) | |
2435 | goto out_iucv; | |
2436 | af_iucv_dev = kzalloc(sizeof(struct device), GFP_KERNEL); | |
2437 | if (!af_iucv_dev) { | |
2438 | err = -ENOMEM; | |
2439 | goto out_driver; | |
2440 | } | |
2441 | dev_set_name(af_iucv_dev, "af_iucv"); | |
2442 | af_iucv_dev->bus = pr_iucv->bus; | |
2443 | af_iucv_dev->parent = pr_iucv->root; | |
2444 | af_iucv_dev->release = (void (*)(struct device *))kfree; | |
2445 | af_iucv_dev->driver = &af_iucv_driver; | |
2446 | err = device_register(af_iucv_dev); | |
2447 | if (err) | |
b8055476 | 2448 | goto out_iucv_dev; |
6fcd61f7 FB |
2449 | return 0; |
2450 | ||
b8055476 AY |
2451 | out_iucv_dev: |
2452 | put_device(af_iucv_dev); | |
6fcd61f7 FB |
2453 | out_driver: |
2454 | driver_unregister(&af_iucv_driver); | |
2455 | out_iucv: | |
2456 | pr_iucv->iucv_unregister(&af_iucv_handler, 0); | |
2457 | out: | |
2458 | return err; | |
2459 | } | |
2460 | ||
da99f056 | 2461 | static int __init afiucv_init(void) |
eac3731b JH |
2462 | { |
2463 | int err; | |
2464 | ||
3881ac44 UB |
2465 | if (MACHINE_IS_VM) { |
2466 | cpcmd("QUERY USERID", iucv_userid, sizeof(iucv_userid), &err); | |
2467 | if (unlikely(err)) { | |
2468 | WARN_ON(err); | |
2469 | err = -EPROTONOSUPPORT; | |
2470 | goto out; | |
2471 | } | |
eac3731b | 2472 | |
3881ac44 UB |
2473 | pr_iucv = try_then_request_module(symbol_get(iucv_if), "iucv"); |
2474 | if (!pr_iucv) { | |
2475 | printk(KERN_WARNING "iucv_if lookup failed\n"); | |
2476 | memset(&iucv_userid, 0, sizeof(iucv_userid)); | |
2477 | } | |
2478 | } else { | |
2479 | memset(&iucv_userid, 0, sizeof(iucv_userid)); | |
2480 | pr_iucv = NULL; | |
6fcd61f7 FB |
2481 | } |
2482 | ||
eac3731b JH |
2483 | err = proto_register(&iucv_proto, 0); |
2484 | if (err) | |
6fcd61f7 | 2485 | goto out; |
eac3731b JH |
2486 | err = sock_register(&iucv_sock_family_ops); |
2487 | if (err) | |
2488 | goto out_proto; | |
6fcd61f7 | 2489 | |
3881ac44 UB |
2490 | if (pr_iucv) { |
2491 | err = afiucv_iucv_init(); | |
2492 | if (err) | |
2493 | goto out_sock; | |
9fbd87d4 UB |
2494 | } else |
2495 | register_netdevice_notifier(&afiucv_netdev_notifier); | |
3881ac44 | 2496 | dev_add_pack(&iucv_packet_type); |
eac3731b JH |
2497 | return 0; |
2498 | ||
c23cad92 UB |
2499 | out_sock: |
2500 | sock_unregister(PF_IUCV); | |
eac3731b JH |
2501 | out_proto: |
2502 | proto_unregister(&iucv_proto); | |
eac3731b | 2503 | out: |
6fcd61f7 FB |
2504 | if (pr_iucv) |
2505 | symbol_put(iucv_if); | |
eac3731b JH |
2506 | return err; |
2507 | } | |
2508 | ||
2509 | static void __exit afiucv_exit(void) | |
2510 | { | |
3881ac44 UB |
2511 | if (pr_iucv) { |
2512 | device_unregister(af_iucv_dev); | |
2513 | driver_unregister(&af_iucv_driver); | |
2514 | pr_iucv->iucv_unregister(&af_iucv_handler, 0); | |
2515 | symbol_put(iucv_if); | |
9fbd87d4 UB |
2516 | } else |
2517 | unregister_netdevice_notifier(&afiucv_netdev_notifier); | |
3881ac44 | 2518 | dev_remove_pack(&iucv_packet_type); |
eac3731b JH |
2519 | sock_unregister(PF_IUCV); |
2520 | proto_unregister(&iucv_proto); | |
eac3731b JH |
2521 | } |
2522 | ||
2523 | module_init(afiucv_init); | |
2524 | module_exit(afiucv_exit); | |
2525 | ||
2526 | MODULE_AUTHOR("Jennifer Hunt <jenhunt@us.ibm.com>"); | |
2527 | MODULE_DESCRIPTION("IUCV Sockets ver " VERSION); | |
2528 | MODULE_VERSION(VERSION); | |
2529 | MODULE_LICENSE("GPL"); | |
2530 | MODULE_ALIAS_NETPROTO(PF_IUCV); | |
3881ac44 | 2531 |