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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; |
3881ac44 UB |
355 | if (!skb->dev) |
356 | return -ENODEV; | |
800c5eb7 | 357 | if (!(skb->dev->flags & IFF_UP) || !netif_carrier_ok(skb->dev)) |
3881ac44 UB |
358 | return -ENETDOWN; |
359 | if (skb->len > skb->dev->mtu) { | |
360 | if (sock->sk_type == SOCK_SEQPACKET) | |
361 | return -EMSGSIZE; | |
362 | else | |
363 | skb_trim(skb, skb->dev->mtu); | |
364 | } | |
2e56c26b | 365 | skb->protocol = cpu_to_be16(ETH_P_AF_IUCV); |
3881ac44 UB |
366 | nskb = skb_clone(skb, GFP_ATOMIC); |
367 | if (!nskb) | |
368 | return -ENOMEM; | |
369 | skb_queue_tail(&iucv->send_skb_q, nskb); | |
370 | err = dev_queue_xmit(skb); | |
800c5eb7 | 371 | if (net_xmit_eval(err)) { |
3881ac44 UB |
372 | skb_unlink(nskb, &iucv->send_skb_q); |
373 | kfree_skb(nskb); | |
374 | } else { | |
375 | atomic_sub(confirm_recv, &iucv->msg_recv); | |
376 | WARN_ON(atomic_read(&iucv->msg_recv) < 0); | |
377 | } | |
800c5eb7 | 378 | return net_xmit_eval(err); |
3881ac44 UB |
379 | } |
380 | ||
eac3731b JH |
381 | static struct sock *__iucv_get_sock_by_name(char *nm) |
382 | { | |
383 | struct sock *sk; | |
eac3731b | 384 | |
b67bfe0d | 385 | sk_for_each(sk, &iucv_sk_list.head) |
eac3731b JH |
386 | if (!memcmp(&iucv_sk(sk)->src_name, nm, 8)) |
387 | return sk; | |
388 | ||
389 | return NULL; | |
390 | } | |
391 | ||
392 | static void iucv_sock_destruct(struct sock *sk) | |
393 | { | |
394 | skb_queue_purge(&sk->sk_receive_queue); | |
82492a35 UB |
395 | skb_queue_purge(&sk->sk_error_queue); |
396 | ||
397 | sk_mem_reclaim(sk); | |
398 | ||
399 | if (!sock_flag(sk, SOCK_DEAD)) { | |
400 | pr_err("Attempt to release alive iucv socket %p\n", sk); | |
401 | return; | |
402 | } | |
403 | ||
404 | WARN_ON(atomic_read(&sk->sk_rmem_alloc)); | |
b2c9c5df | 405 | WARN_ON(refcount_read(&sk->sk_wmem_alloc)); |
82492a35 UB |
406 | WARN_ON(sk->sk_wmem_queued); |
407 | WARN_ON(sk->sk_forward_alloc); | |
eac3731b JH |
408 | } |
409 | ||
410 | /* Cleanup Listen */ | |
411 | static void iucv_sock_cleanup_listen(struct sock *parent) | |
412 | { | |
413 | struct sock *sk; | |
414 | ||
415 | /* Close non-accepted connections */ | |
416 | while ((sk = iucv_accept_dequeue(parent, NULL))) { | |
417 | iucv_sock_close(sk); | |
418 | iucv_sock_kill(sk); | |
419 | } | |
420 | ||
421 | parent->sk_state = IUCV_CLOSED; | |
eac3731b JH |
422 | } |
423 | ||
7514bab0 | 424 | /* Kill socket (only if zapped and orphaned) */ |
eac3731b JH |
425 | static void iucv_sock_kill(struct sock *sk) |
426 | { | |
427 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
428 | return; | |
429 | ||
430 | iucv_sock_unlink(&iucv_sk_list, sk); | |
431 | sock_set_flag(sk, SOCK_DEAD); | |
432 | sock_put(sk); | |
433 | } | |
434 | ||
7d316b94 UB |
435 | /* Terminate an IUCV path */ |
436 | static void iucv_sever_path(struct sock *sk, int with_user_data) | |
437 | { | |
438 | unsigned char user_data[16]; | |
439 | struct iucv_sock *iucv = iucv_sk(sk); | |
440 | struct iucv_path *path = iucv->path; | |
441 | ||
442 | if (iucv->path) { | |
443 | iucv->path = NULL; | |
444 | if (with_user_data) { | |
445 | low_nmcpy(user_data, iucv->src_name); | |
446 | high_nmcpy(user_data, iucv->dst_name); | |
447 | ASCEBC(user_data, sizeof(user_data)); | |
448 | pr_iucv->path_sever(path, user_data); | |
449 | } else | |
450 | pr_iucv->path_sever(path, NULL); | |
451 | iucv_path_free(path); | |
452 | } | |
453 | } | |
454 | ||
4e0ad322 | 455 | /* Send controlling flags through an IUCV socket for HIPER transport */ |
9fbd87d4 UB |
456 | static int iucv_send_ctrl(struct sock *sk, u8 flags) |
457 | { | |
458 | int err = 0; | |
459 | int blen; | |
460 | struct sk_buff *skb; | |
4e0ad322 | 461 | u8 shutdown = 0; |
9fbd87d4 UB |
462 | |
463 | blen = sizeof(struct af_iucv_trans_hdr) + ETH_HLEN; | |
4e0ad322 UB |
464 | if (sk->sk_shutdown & SEND_SHUTDOWN) { |
465 | /* controlling flags should be sent anyway */ | |
466 | shutdown = sk->sk_shutdown; | |
467 | sk->sk_shutdown &= RCV_SHUTDOWN; | |
468 | } | |
9fbd87d4 UB |
469 | skb = sock_alloc_send_skb(sk, blen, 1, &err); |
470 | if (skb) { | |
471 | skb_reserve(skb, blen); | |
472 | err = afiucv_hs_send(NULL, sk, skb, flags); | |
473 | } | |
4e0ad322 UB |
474 | if (shutdown) |
475 | sk->sk_shutdown = shutdown; | |
9fbd87d4 UB |
476 | return err; |
477 | } | |
478 | ||
eac3731b JH |
479 | /* Close an IUCV socket */ |
480 | static void iucv_sock_close(struct sock *sk) | |
481 | { | |
eac3731b | 482 | struct iucv_sock *iucv = iucv_sk(sk); |
561e0360 | 483 | unsigned long timeo; |
800c5eb7 | 484 | int err = 0; |
eac3731b | 485 | |
eac3731b JH |
486 | lock_sock(sk); |
487 | ||
da99f056 | 488 | switch (sk->sk_state) { |
eac3731b JH |
489 | case IUCV_LISTEN: |
490 | iucv_sock_cleanup_listen(sk); | |
491 | break; | |
492 | ||
493 | case IUCV_CONNECTED: | |
3881ac44 | 494 | if (iucv->transport == AF_IUCV_TRANS_HIPER) { |
9fbd87d4 | 495 | err = iucv_send_ctrl(sk, AF_IUCV_FLAG_FIN); |
3881ac44 UB |
496 | sk->sk_state = IUCV_DISCONN; |
497 | sk->sk_state_change(sk); | |
498 | } | |
816abbad | 499 | case IUCV_DISCONN: /* fall through */ |
561e0360 JH |
500 | sk->sk_state = IUCV_CLOSING; |
501 | sk->sk_state_change(sk); | |
502 | ||
800c5eb7 | 503 | if (!err && !skb_queue_empty(&iucv->send_skb_q)) { |
561e0360 JH |
504 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) |
505 | timeo = sk->sk_lingertime; | |
506 | else | |
507 | timeo = IUCV_DISCONN_TIMEOUT; | |
9f6298a6 | 508 | iucv_sock_wait(sk, |
0ea920d2 HB |
509 | iucv_sock_in_state(sk, IUCV_CLOSED, 0), |
510 | timeo); | |
561e0360 JH |
511 | } |
512 | ||
bbe188c8 | 513 | case IUCV_CLOSING: /* fall through */ |
561e0360 JH |
514 | sk->sk_state = IUCV_CLOSED; |
515 | sk->sk_state_change(sk); | |
516 | ||
eac3731b JH |
517 | sk->sk_err = ECONNRESET; |
518 | sk->sk_state_change(sk); | |
519 | ||
800c5eb7 | 520 | skb_queue_purge(&iucv->send_skb_q); |
561e0360 | 521 | skb_queue_purge(&iucv->backlog_skb_q); |
eac3731b | 522 | |
7d316b94 UB |
523 | default: /* fall through */ |
524 | iucv_sever_path(sk, 1); | |
3ff50b79 | 525 | } |
eac3731b | 526 | |
800c5eb7 UB |
527 | if (iucv->hs_dev) { |
528 | dev_put(iucv->hs_dev); | |
529 | iucv->hs_dev = NULL; | |
530 | sk->sk_bound_dev_if = 0; | |
531 | } | |
532 | ||
7514bab0 HB |
533 | /* mark socket for deletion by iucv_sock_kill() */ |
534 | sock_set_flag(sk, SOCK_ZAPPED); | |
535 | ||
eac3731b | 536 | release_sock(sk); |
eac3731b JH |
537 | } |
538 | ||
539 | static void iucv_sock_init(struct sock *sk, struct sock *parent) | |
540 | { | |
02f06918 | 541 | if (parent) { |
eac3731b | 542 | sk->sk_type = parent->sk_type; |
02f06918 PM |
543 | security_sk_clone(parent, sk); |
544 | } | |
eac3731b JH |
545 | } |
546 | ||
11aa9c28 | 547 | static struct sock *iucv_sock_alloc(struct socket *sock, int proto, gfp_t prio, int kern) |
eac3731b JH |
548 | { |
549 | struct sock *sk; | |
493d3971 | 550 | struct iucv_sock *iucv; |
eac3731b | 551 | |
11aa9c28 | 552 | sk = sk_alloc(&init_net, PF_IUCV, prio, &iucv_proto, kern); |
eac3731b JH |
553 | if (!sk) |
554 | return NULL; | |
493d3971 | 555 | iucv = iucv_sk(sk); |
eac3731b JH |
556 | |
557 | sock_init_data(sock, sk); | |
493d3971 UB |
558 | INIT_LIST_HEAD(&iucv->accept_q); |
559 | spin_lock_init(&iucv->accept_q_lock); | |
560 | skb_queue_head_init(&iucv->send_skb_q); | |
561 | INIT_LIST_HEAD(&iucv->message_q.list); | |
562 | spin_lock_init(&iucv->message_q.lock); | |
563 | skb_queue_head_init(&iucv->backlog_skb_q); | |
564 | iucv->send_tag = 0; | |
3881ac44 | 565 | atomic_set(&iucv->pendings, 0); |
493d3971 | 566 | iucv->flags = 0; |
3881ac44 UB |
567 | iucv->msglimit = 0; |
568 | atomic_set(&iucv->msg_sent, 0); | |
569 | atomic_set(&iucv->msg_recv, 0); | |
493d3971 | 570 | iucv->path = NULL; |
3881ac44 | 571 | iucv->sk_txnotify = afiucv_hs_callback_txnotify; |
493d3971 | 572 | memset(&iucv->src_user_id , 0, 32); |
3881ac44 UB |
573 | if (pr_iucv) |
574 | iucv->transport = AF_IUCV_TRANS_IUCV; | |
575 | else | |
576 | iucv->transport = AF_IUCV_TRANS_HIPER; | |
eac3731b JH |
577 | |
578 | sk->sk_destruct = iucv_sock_destruct; | |
579 | sk->sk_sndtimeo = IUCV_CONN_TIMEOUT; | |
580 | sk->sk_allocation = GFP_DMA; | |
581 | ||
582 | sock_reset_flag(sk, SOCK_ZAPPED); | |
583 | ||
584 | sk->sk_protocol = proto; | |
585 | sk->sk_state = IUCV_OPEN; | |
586 | ||
eac3731b JH |
587 | iucv_sock_link(&iucv_sk_list, sk); |
588 | return sk; | |
589 | } | |
590 | ||
591 | /* Create an IUCV socket */ | |
3f378b68 EP |
592 | static int iucv_sock_create(struct net *net, struct socket *sock, int protocol, |
593 | int kern) | |
eac3731b JH |
594 | { |
595 | struct sock *sk; | |
596 | ||
aa8e71f5 HB |
597 | if (protocol && protocol != PF_IUCV) |
598 | return -EPROTONOSUPPORT; | |
eac3731b JH |
599 | |
600 | sock->state = SS_UNCONNECTED; | |
aa8e71f5 HB |
601 | |
602 | switch (sock->type) { | |
603 | case SOCK_STREAM: | |
604 | sock->ops = &iucv_sock_ops; | |
605 | break; | |
606 | case SOCK_SEQPACKET: | |
607 | /* currently, proto ops can handle both sk types */ | |
608 | sock->ops = &iucv_sock_ops; | |
609 | break; | |
610 | default: | |
611 | return -ESOCKTNOSUPPORT; | |
612 | } | |
eac3731b | 613 | |
11aa9c28 | 614 | sk = iucv_sock_alloc(sock, protocol, GFP_KERNEL, kern); |
eac3731b JH |
615 | if (!sk) |
616 | return -ENOMEM; | |
617 | ||
618 | iucv_sock_init(sk, NULL); | |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
623 | void iucv_sock_link(struct iucv_sock_list *l, struct sock *sk) | |
624 | { | |
625 | write_lock_bh(&l->lock); | |
626 | sk_add_node(sk, &l->head); | |
627 | write_unlock_bh(&l->lock); | |
628 | } | |
629 | ||
630 | void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *sk) | |
631 | { | |
632 | write_lock_bh(&l->lock); | |
633 | sk_del_node_init(sk); | |
634 | write_unlock_bh(&l->lock); | |
635 | } | |
636 | ||
637 | void iucv_accept_enqueue(struct sock *parent, struct sock *sk) | |
638 | { | |
febca281 UB |
639 | unsigned long flags; |
640 | struct iucv_sock *par = iucv_sk(parent); | |
641 | ||
eac3731b | 642 | sock_hold(sk); |
febca281 UB |
643 | spin_lock_irqsave(&par->accept_q_lock, flags); |
644 | list_add_tail(&iucv_sk(sk)->accept_q, &par->accept_q); | |
645 | spin_unlock_irqrestore(&par->accept_q_lock, flags); | |
eac3731b | 646 | iucv_sk(sk)->parent = parent; |
49f5eba7 | 647 | sk_acceptq_added(parent); |
eac3731b JH |
648 | } |
649 | ||
650 | void iucv_accept_unlink(struct sock *sk) | |
651 | { | |
febca281 UB |
652 | unsigned long flags; |
653 | struct iucv_sock *par = iucv_sk(iucv_sk(sk)->parent); | |
654 | ||
655 | spin_lock_irqsave(&par->accept_q_lock, flags); | |
eac3731b | 656 | list_del_init(&iucv_sk(sk)->accept_q); |
febca281 | 657 | spin_unlock_irqrestore(&par->accept_q_lock, flags); |
49f5eba7 | 658 | sk_acceptq_removed(iucv_sk(sk)->parent); |
eac3731b JH |
659 | iucv_sk(sk)->parent = NULL; |
660 | sock_put(sk); | |
661 | } | |
662 | ||
663 | struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock) | |
664 | { | |
665 | struct iucv_sock *isk, *n; | |
666 | struct sock *sk; | |
667 | ||
da99f056 | 668 | list_for_each_entry_safe(isk, n, &iucv_sk(parent)->accept_q, accept_q) { |
eac3731b JH |
669 | sk = (struct sock *) isk; |
670 | lock_sock(sk); | |
671 | ||
672 | if (sk->sk_state == IUCV_CLOSED) { | |
eac3731b | 673 | iucv_accept_unlink(sk); |
febca281 | 674 | release_sock(sk); |
eac3731b JH |
675 | continue; |
676 | } | |
677 | ||
678 | if (sk->sk_state == IUCV_CONNECTED || | |
aac6399c | 679 | sk->sk_state == IUCV_DISCONN || |
eac3731b JH |
680 | !newsock) { |
681 | iucv_accept_unlink(sk); | |
682 | if (newsock) | |
683 | sock_graft(sk, newsock); | |
684 | ||
eac3731b JH |
685 | release_sock(sk); |
686 | return sk; | |
687 | } | |
688 | ||
689 | release_sock(sk); | |
690 | } | |
691 | return NULL; | |
692 | } | |
693 | ||
53a4b499 PH |
694 | static void __iucv_auto_name(struct iucv_sock *iucv) |
695 | { | |
696 | char name[12]; | |
697 | ||
698 | sprintf(name, "%08x", atomic_inc_return(&iucv_sk_list.autobind_name)); | |
699 | while (__iucv_get_sock_by_name(name)) { | |
700 | sprintf(name, "%08x", | |
701 | atomic_inc_return(&iucv_sk_list.autobind_name)); | |
702 | } | |
703 | memcpy(iucv->src_name, name, 8); | |
704 | } | |
705 | ||
eac3731b JH |
706 | /* Bind an unbound socket */ |
707 | static int iucv_sock_bind(struct socket *sock, struct sockaddr *addr, | |
708 | int addr_len) | |
709 | { | |
710 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
711 | struct sock *sk = sock->sk; | |
712 | struct iucv_sock *iucv; | |
3881ac44 UB |
713 | int err = 0; |
714 | struct net_device *dev; | |
715 | char uid[9]; | |
eac3731b JH |
716 | |
717 | /* Verify the input sockaddr */ | |
e3c42b61 MJ |
718 | if (addr_len < sizeof(struct sockaddr_iucv) || |
719 | addr->sa_family != AF_IUCV) | |
52a82e23 UB |
720 | return -EINVAL; |
721 | ||
eac3731b JH |
722 | lock_sock(sk); |
723 | if (sk->sk_state != IUCV_OPEN) { | |
724 | err = -EBADFD; | |
725 | goto done; | |
726 | } | |
727 | ||
728 | write_lock_bh(&iucv_sk_list.lock); | |
729 | ||
730 | iucv = iucv_sk(sk); | |
731 | if (__iucv_get_sock_by_name(sa->siucv_name)) { | |
732 | err = -EADDRINUSE; | |
733 | goto done_unlock; | |
734 | } | |
3881ac44 | 735 | if (iucv->path) |
eac3731b | 736 | goto done_unlock; |
eac3731b JH |
737 | |
738 | /* Bind the socket */ | |
3881ac44 UB |
739 | if (pr_iucv) |
740 | if (!memcmp(sa->siucv_user_id, iucv_userid, 8)) | |
741 | goto vm_bind; /* VM IUCV transport */ | |
eac3731b | 742 | |
3881ac44 UB |
743 | /* try hiper transport */ |
744 | memcpy(uid, sa->siucv_user_id, sizeof(uid)); | |
745 | ASCEBC(uid, 8); | |
746 | rcu_read_lock(); | |
747 | for_each_netdev_rcu(&init_net, dev) { | |
748 | if (!memcmp(dev->perm_addr, uid, 8)) { | |
3881ac44 | 749 | memcpy(iucv->src_user_id, sa->siucv_user_id, 8); |
53a4b499 PH |
750 | /* Check for unitialized siucv_name */ |
751 | if (strncmp(sa->siucv_name, " ", 8) == 0) | |
752 | __iucv_auto_name(iucv); | |
753 | else | |
754 | memcpy(iucv->src_name, sa->siucv_name, 8); | |
816abbad | 755 | sk->sk_bound_dev_if = dev->ifindex; |
800c5eb7 UB |
756 | iucv->hs_dev = dev; |
757 | dev_hold(dev); | |
3881ac44 UB |
758 | sk->sk_state = IUCV_BOUND; |
759 | iucv->transport = AF_IUCV_TRANS_HIPER; | |
760 | if (!iucv->msglimit) | |
761 | iucv->msglimit = IUCV_HIPER_MSGLIM_DEFAULT; | |
762 | rcu_read_unlock(); | |
763 | goto done_unlock; | |
764 | } | |
765 | } | |
766 | rcu_read_unlock(); | |
767 | vm_bind: | |
768 | if (pr_iucv) { | |
769 | /* use local userid for backward compat */ | |
770 | memcpy(iucv->src_name, sa->siucv_name, 8); | |
771 | memcpy(iucv->src_user_id, iucv_userid, 8); | |
772 | sk->sk_state = IUCV_BOUND; | |
773 | iucv->transport = AF_IUCV_TRANS_IUCV; | |
774 | if (!iucv->msglimit) | |
775 | iucv->msglimit = IUCV_QUEUELEN_DEFAULT; | |
776 | goto done_unlock; | |
777 | } | |
778 | /* found no dev to bind */ | |
779 | err = -ENODEV; | |
eac3731b JH |
780 | done_unlock: |
781 | /* Release the socket list lock */ | |
782 | write_unlock_bh(&iucv_sk_list.lock); | |
783 | done: | |
784 | release_sock(sk); | |
785 | return err; | |
786 | } | |
787 | ||
788 | /* Automatically bind an unbound socket */ | |
789 | static int iucv_sock_autobind(struct sock *sk) | |
790 | { | |
791 | struct iucv_sock *iucv = iucv_sk(sk); | |
eac3731b JH |
792 | int err = 0; |
793 | ||
aac6399c | 794 | if (unlikely(!pr_iucv)) |
eac3731b JH |
795 | return -EPROTO; |
796 | ||
aac6399c | 797 | memcpy(iucv->src_user_id, iucv_userid, 8); |
eac3731b JH |
798 | |
799 | write_lock_bh(&iucv_sk_list.lock); | |
53a4b499 | 800 | __iucv_auto_name(iucv); |
eac3731b JH |
801 | write_unlock_bh(&iucv_sk_list.lock); |
802 | ||
3881ac44 UB |
803 | if (!iucv->msglimit) |
804 | iucv->msglimit = IUCV_QUEUELEN_DEFAULT; | |
805 | ||
eac3731b JH |
806 | return err; |
807 | } | |
808 | ||
3881ac44 | 809 | static int afiucv_path_connect(struct socket *sock, struct sockaddr *addr) |
eac3731b JH |
810 | { |
811 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
812 | struct sock *sk = sock->sk; | |
493d3971 | 813 | struct iucv_sock *iucv = iucv_sk(sk); |
eac3731b JH |
814 | unsigned char user_data[16]; |
815 | int err; | |
816 | ||
eac3731b | 817 | high_nmcpy(user_data, sa->siucv_name); |
493d3971 | 818 | low_nmcpy(user_data, iucv->src_name); |
eac3731b JH |
819 | ASCEBC(user_data, sizeof(user_data)); |
820 | ||
eac3731b | 821 | /* Create path. */ |
09488e2e | 822 | iucv->path = iucv_path_alloc(iucv->msglimit, |
b8942e3b | 823 | IUCV_IPRMDATA, GFP_KERNEL); |
d4444722 UB |
824 | if (!iucv->path) { |
825 | err = -ENOMEM; | |
826 | goto done; | |
827 | } | |
6fcd61f7 FB |
828 | err = pr_iucv->path_connect(iucv->path, &af_iucv_handler, |
829 | sa->siucv_user_id, NULL, user_data, | |
830 | sk); | |
eac3731b JH |
831 | if (err) { |
832 | iucv_path_free(iucv->path); | |
833 | iucv->path = NULL; | |
55cdea9e HB |
834 | switch (err) { |
835 | case 0x0b: /* Target communicator is not logged on */ | |
836 | err = -ENETUNREACH; | |
837 | break; | |
838 | case 0x0d: /* Max connections for this guest exceeded */ | |
839 | case 0x0e: /* Max connections for target guest exceeded */ | |
840 | err = -EAGAIN; | |
841 | break; | |
842 | case 0x0f: /* Missing IUCV authorization */ | |
843 | err = -EACCES; | |
844 | break; | |
845 | default: | |
846 | err = -ECONNREFUSED; | |
847 | break; | |
848 | } | |
eac3731b | 849 | } |
3881ac44 UB |
850 | done: |
851 | return err; | |
852 | } | |
eac3731b | 853 | |
3881ac44 UB |
854 | /* Connect an unconnected socket */ |
855 | static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr, | |
856 | int alen, int flags) | |
857 | { | |
858 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
859 | struct sock *sk = sock->sk; | |
860 | struct iucv_sock *iucv = iucv_sk(sk); | |
861 | int err; | |
862 | ||
e3c42b61 | 863 | if (alen < sizeof(struct sockaddr_iucv) || addr->sa_family != AF_IUCV) |
3881ac44 UB |
864 | return -EINVAL; |
865 | ||
866 | if (sk->sk_state != IUCV_OPEN && sk->sk_state != IUCV_BOUND) | |
867 | return -EBADFD; | |
868 | ||
869 | if (sk->sk_state == IUCV_OPEN && | |
870 | iucv->transport == AF_IUCV_TRANS_HIPER) | |
871 | return -EBADFD; /* explicit bind required */ | |
872 | ||
873 | if (sk->sk_type != SOCK_STREAM && sk->sk_type != SOCK_SEQPACKET) | |
874 | return -EINVAL; | |
875 | ||
876 | if (sk->sk_state == IUCV_OPEN) { | |
877 | err = iucv_sock_autobind(sk); | |
878 | if (unlikely(err)) | |
879 | return err; | |
880 | } | |
881 | ||
882 | lock_sock(sk); | |
883 | ||
884 | /* Set the destination information */ | |
885 | memcpy(iucv->dst_user_id, sa->siucv_user_id, 8); | |
886 | memcpy(iucv->dst_name, sa->siucv_name, 8); | |
887 | ||
888 | if (iucv->transport == AF_IUCV_TRANS_HIPER) | |
9fbd87d4 | 889 | err = iucv_send_ctrl(sock->sk, AF_IUCV_FLAG_SYN); |
3881ac44 UB |
890 | else |
891 | err = afiucv_path_connect(sock, addr); | |
892 | if (err) | |
893 | goto done; | |
894 | ||
895 | if (sk->sk_state != IUCV_CONNECTED) | |
0ea920d2 HB |
896 | err = iucv_sock_wait(sk, iucv_sock_in_state(sk, IUCV_CONNECTED, |
897 | IUCV_DISCONN), | |
898 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
eac3731b | 899 | |
3881ac44 | 900 | if (sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_CLOSED) |
b8942e3b | 901 | err = -ECONNREFUSED; |
18becbc5 | 902 | |
7d316b94 UB |
903 | if (err && iucv->transport == AF_IUCV_TRANS_IUCV) |
904 | iucv_sever_path(sk, 0); | |
18becbc5 | 905 | |
eac3731b JH |
906 | done: |
907 | release_sock(sk); | |
908 | return err; | |
909 | } | |
910 | ||
911 | /* Move a socket into listening state. */ | |
912 | static int iucv_sock_listen(struct socket *sock, int backlog) | |
913 | { | |
914 | struct sock *sk = sock->sk; | |
915 | int err; | |
916 | ||
917 | lock_sock(sk); | |
918 | ||
919 | err = -EINVAL; | |
aa8e71f5 HB |
920 | if (sk->sk_state != IUCV_BOUND) |
921 | goto done; | |
922 | ||
923 | if (sock->type != SOCK_STREAM && sock->type != SOCK_SEQPACKET) | |
eac3731b JH |
924 | goto done; |
925 | ||
926 | sk->sk_max_ack_backlog = backlog; | |
927 | sk->sk_ack_backlog = 0; | |
928 | sk->sk_state = IUCV_LISTEN; | |
929 | err = 0; | |
930 | ||
931 | done: | |
932 | release_sock(sk); | |
933 | return err; | |
934 | } | |
935 | ||
936 | /* Accept a pending connection */ | |
937 | static int iucv_sock_accept(struct socket *sock, struct socket *newsock, | |
cdfbabfb | 938 | int flags, bool kern) |
eac3731b JH |
939 | { |
940 | DECLARE_WAITQUEUE(wait, current); | |
941 | struct sock *sk = sock->sk, *nsk; | |
942 | long timeo; | |
943 | int err = 0; | |
944 | ||
561e0360 | 945 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
eac3731b JH |
946 | |
947 | if (sk->sk_state != IUCV_LISTEN) { | |
948 | err = -EBADFD; | |
949 | goto done; | |
950 | } | |
951 | ||
952 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
953 | ||
954 | /* Wait for an incoming connection */ | |
aa395145 | 955 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
da99f056 | 956 | while (!(nsk = iucv_accept_dequeue(sk, newsock))) { |
eac3731b JH |
957 | set_current_state(TASK_INTERRUPTIBLE); |
958 | if (!timeo) { | |
959 | err = -EAGAIN; | |
960 | break; | |
961 | } | |
962 | ||
963 | release_sock(sk); | |
964 | timeo = schedule_timeout(timeo); | |
561e0360 | 965 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
eac3731b JH |
966 | |
967 | if (sk->sk_state != IUCV_LISTEN) { | |
968 | err = -EBADFD; | |
969 | break; | |
970 | } | |
971 | ||
972 | if (signal_pending(current)) { | |
973 | err = sock_intr_errno(timeo); | |
974 | break; | |
975 | } | |
976 | } | |
977 | ||
978 | set_current_state(TASK_RUNNING); | |
aa395145 | 979 | remove_wait_queue(sk_sleep(sk), &wait); |
eac3731b JH |
980 | |
981 | if (err) | |
982 | goto done; | |
983 | ||
984 | newsock->state = SS_CONNECTED; | |
985 | ||
986 | done: | |
987 | release_sock(sk); | |
988 | return err; | |
989 | } | |
990 | ||
991 | static int iucv_sock_getname(struct socket *sock, struct sockaddr *addr, | |
992 | int *len, int peer) | |
993 | { | |
994 | struct sockaddr_iucv *siucv = (struct sockaddr_iucv *) addr; | |
995 | struct sock *sk = sock->sk; | |
493d3971 | 996 | struct iucv_sock *iucv = iucv_sk(sk); |
eac3731b JH |
997 | |
998 | addr->sa_family = AF_IUCV; | |
999 | *len = sizeof(struct sockaddr_iucv); | |
1000 | ||
1001 | if (peer) { | |
493d3971 UB |
1002 | memcpy(siucv->siucv_user_id, iucv->dst_user_id, 8); |
1003 | memcpy(siucv->siucv_name, iucv->dst_name, 8); | |
eac3731b | 1004 | } else { |
493d3971 UB |
1005 | memcpy(siucv->siucv_user_id, iucv->src_user_id, 8); |
1006 | memcpy(siucv->siucv_name, iucv->src_name, 8); | |
eac3731b JH |
1007 | } |
1008 | memset(&siucv->siucv_port, 0, sizeof(siucv->siucv_port)); | |
1009 | memset(&siucv->siucv_addr, 0, sizeof(siucv->siucv_addr)); | |
493d3971 | 1010 | memset(&siucv->siucv_nodeid, 0, sizeof(siucv->siucv_nodeid)); |
eac3731b JH |
1011 | |
1012 | return 0; | |
1013 | } | |
1014 | ||
b8942e3b HB |
1015 | /** |
1016 | * iucv_send_iprm() - Send socket data in parameter list of an iucv message. | |
1017 | * @path: IUCV path | |
1018 | * @msg: Pointer to a struct iucv_message | |
1019 | * @skb: The socket data to send, skb->len MUST BE <= 7 | |
1020 | * | |
1021 | * Send the socket data in the parameter list in the iucv message | |
1022 | * (IUCV_IPRMDATA). The socket data is stored at index 0 to 6 in the parameter | |
1023 | * list and the socket data len at index 7 (last byte). | |
1024 | * See also iucv_msg_length(). | |
1025 | * | |
1026 | * Returns the error code from the iucv_message_send() call. | |
1027 | */ | |
1028 | static int iucv_send_iprm(struct iucv_path *path, struct iucv_message *msg, | |
1029 | struct sk_buff *skb) | |
1030 | { | |
1031 | u8 prmdata[8]; | |
1032 | ||
1033 | memcpy(prmdata, (void *) skb->data, skb->len); | |
1034 | prmdata[7] = 0xff - (u8) skb->len; | |
6fcd61f7 | 1035 | return pr_iucv->message_send(path, msg, IUCV_IPRMDATA, 0, |
b8942e3b HB |
1036 | (void *) prmdata, 8); |
1037 | } | |
1038 | ||
1b784140 YX |
1039 | static int iucv_sock_sendmsg(struct socket *sock, struct msghdr *msg, |
1040 | size_t len) | |
eac3731b JH |
1041 | { |
1042 | struct sock *sk = sock->sk; | |
1043 | struct iucv_sock *iucv = iucv_sk(sk); | |
dc5367bc JW |
1044 | size_t headroom = 0; |
1045 | size_t linear; | |
eac3731b | 1046 | struct sk_buff *skb; |
0506eb01 | 1047 | struct iucv_message txmsg = {0}; |
44b1e6b5 HB |
1048 | struct cmsghdr *cmsg; |
1049 | int cmsg_done; | |
0ea920d2 | 1050 | long timeo; |
8f7c502c UB |
1051 | char user_id[9]; |
1052 | char appl_id[9]; | |
eac3731b | 1053 | int err; |
0ea920d2 | 1054 | int noblock = msg->msg_flags & MSG_DONTWAIT; |
eac3731b JH |
1055 | |
1056 | err = sock_error(sk); | |
1057 | if (err) | |
1058 | return err; | |
1059 | ||
1060 | if (msg->msg_flags & MSG_OOB) | |
1061 | return -EOPNOTSUPP; | |
1062 | ||
aa8e71f5 HB |
1063 | /* SOCK_SEQPACKET: we do not support segmented records */ |
1064 | if (sk->sk_type == SOCK_SEQPACKET && !(msg->msg_flags & MSG_EOR)) | |
1065 | return -EOPNOTSUPP; | |
1066 | ||
eac3731b JH |
1067 | lock_sock(sk); |
1068 | ||
1069 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1070 | err = -EPIPE; | |
1071 | goto out; | |
1072 | } | |
1073 | ||
bb664f49 HB |
1074 | /* Return if the socket is not in connected state */ |
1075 | if (sk->sk_state != IUCV_CONNECTED) { | |
1076 | err = -ENOTCONN; | |
1077 | goto out; | |
1078 | } | |
44b1e6b5 | 1079 | |
bb664f49 HB |
1080 | /* initialize defaults */ |
1081 | cmsg_done = 0; /* check for duplicate headers */ | |
1082 | txmsg.class = 0; | |
44b1e6b5 | 1083 | |
bb664f49 | 1084 | /* iterate over control messages */ |
f95b414e | 1085 | for_each_cmsghdr(cmsg, msg) { |
bb664f49 HB |
1086 | if (!CMSG_OK(msg, cmsg)) { |
1087 | err = -EINVAL; | |
1088 | goto out; | |
1089 | } | |
44b1e6b5 | 1090 | |
bb664f49 HB |
1091 | if (cmsg->cmsg_level != SOL_IUCV) |
1092 | continue; | |
44b1e6b5 | 1093 | |
bb664f49 HB |
1094 | if (cmsg->cmsg_type & cmsg_done) { |
1095 | err = -EINVAL; | |
1096 | goto out; | |
1097 | } | |
1098 | cmsg_done |= cmsg->cmsg_type; | |
44b1e6b5 | 1099 | |
bb664f49 HB |
1100 | switch (cmsg->cmsg_type) { |
1101 | case SCM_IUCV_TRGCLS: | |
1102 | if (cmsg->cmsg_len != CMSG_LEN(TRGCLS_SIZE)) { | |
44b1e6b5 HB |
1103 | err = -EINVAL; |
1104 | goto out; | |
1105 | } | |
44b1e6b5 | 1106 | |
bb664f49 HB |
1107 | /* set iucv message target class */ |
1108 | memcpy(&txmsg.class, | |
1109 | (void *) CMSG_DATA(cmsg), TRGCLS_SIZE); | |
44b1e6b5 | 1110 | |
bb664f49 | 1111 | break; |
44b1e6b5 | 1112 | |
bb664f49 HB |
1113 | default: |
1114 | err = -EINVAL; | |
1115 | goto out; | |
44b1e6b5 | 1116 | } |
bb664f49 | 1117 | } |
44b1e6b5 | 1118 | |
bb664f49 HB |
1119 | /* allocate one skb for each iucv message: |
1120 | * this is fine for SOCK_SEQPACKET (unless we want to support | |
1121 | * segmented records using the MSG_EOR flag), but | |
1122 | * for SOCK_STREAM we might want to improve it in future */ | |
dc5367bc JW |
1123 | if (iucv->transport == AF_IUCV_TRANS_HIPER) { |
1124 | headroom = sizeof(struct af_iucv_trans_hdr) + ETH_HLEN; | |
e5374399 EC |
1125 | linear = len; |
1126 | } else { | |
dc5367bc JW |
1127 | if (len < PAGE_SIZE) { |
1128 | linear = len; | |
1129 | } else { | |
1130 | /* In nonlinear "classic" iucv skb, | |
1131 | * reserve space for iucv_array | |
1132 | */ | |
1133 | headroom = sizeof(struct iucv_array) * | |
1134 | (MAX_SKB_FRAGS + 1); | |
1135 | linear = PAGE_SIZE - headroom; | |
1136 | } | |
e5374399 EC |
1137 | } |
1138 | skb = sock_alloc_send_pskb(sk, headroom + linear, len - linear, | |
1139 | noblock, &err, 0); | |
ed4ac422 | 1140 | if (!skb) |
bb664f49 | 1141 | goto out; |
e5374399 EC |
1142 | if (headroom) |
1143 | skb_reserve(skb, headroom); | |
1144 | skb_put(skb, linear); | |
1145 | skb->len = len; | |
1146 | skb->data_len = len - linear; | |
1147 | err = skb_copy_datagram_from_iter(skb, 0, &msg->msg_iter, len); | |
1148 | if (err) | |
bb664f49 | 1149 | goto fail; |
eac3731b | 1150 | |
0ea920d2 HB |
1151 | /* wait if outstanding messages for iucv path has reached */ |
1152 | timeo = sock_sndtimeo(sk, noblock); | |
1153 | err = iucv_sock_wait(sk, iucv_below_msglim(sk), timeo); | |
1154 | if (err) | |
1155 | goto fail; | |
eac3731b | 1156 | |
0ea920d2 HB |
1157 | /* return -ECONNRESET if the socket is no longer connected */ |
1158 | if (sk->sk_state != IUCV_CONNECTED) { | |
1159 | err = -ECONNRESET; | |
1160 | goto fail; | |
1161 | } | |
b8942e3b | 1162 | |
bb664f49 HB |
1163 | /* increment and save iucv message tag for msg_completion cbk */ |
1164 | txmsg.tag = iucv->send_tag++; | |
f9c41a62 | 1165 | IUCV_SKB_CB(skb)->tag = txmsg.tag; |
800c5eb7 | 1166 | |
3881ac44 UB |
1167 | if (iucv->transport == AF_IUCV_TRANS_HIPER) { |
1168 | atomic_inc(&iucv->msg_sent); | |
1169 | err = afiucv_hs_send(&txmsg, sk, skb, 0); | |
1170 | if (err) { | |
1171 | atomic_dec(&iucv->msg_sent); | |
1172 | goto fail; | |
1173 | } | |
e5374399 EC |
1174 | } else { /* Classic VM IUCV transport */ |
1175 | skb_queue_tail(&iucv->send_skb_q, skb); | |
1176 | ||
1177 | if (((iucv->path->flags & IUCV_IPRMDATA) & iucv->flags) && | |
1178 | skb->len <= 7) { | |
1179 | err = iucv_send_iprm(iucv->path, &txmsg, skb); | |
1180 | ||
1181 | /* on success: there is no message_complete callback */ | |
1182 | /* for an IPRMDATA msg; remove skb from send queue */ | |
1183 | if (err == 0) { | |
1184 | skb_unlink(skb, &iucv->send_skb_q); | |
1185 | kfree_skb(skb); | |
1186 | } | |
b8942e3b | 1187 | |
e5374399 EC |
1188 | /* this error should never happen since the */ |
1189 | /* IUCV_IPRMDATA path flag is set... sever path */ | |
1190 | if (err == 0x15) { | |
1191 | pr_iucv->path_sever(iucv->path, NULL); | |
1192 | skb_unlink(skb, &iucv->send_skb_q); | |
1193 | err = -EPIPE; | |
1194 | goto fail; | |
1195 | } | |
1196 | } else if (skb_is_nonlinear(skb)) { | |
1197 | struct iucv_array *iba = (struct iucv_array *)skb->head; | |
1198 | int i; | |
1199 | ||
1200 | /* skip iucv_array lying in the headroom */ | |
1201 | iba[0].address = (u32)(addr_t)skb->data; | |
1202 | iba[0].length = (u32)skb_headlen(skb); | |
1203 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1204 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1205 | ||
1206 | iba[i + 1].address = | |
1207 | (u32)(addr_t)skb_frag_address(frag); | |
1208 | iba[i + 1].length = (u32)skb_frag_size(frag); | |
1209 | } | |
1210 | err = pr_iucv->message_send(iucv->path, &txmsg, | |
1211 | IUCV_IPBUFLST, 0, | |
1212 | (void *)iba, skb->len); | |
1213 | } else { /* non-IPRM Linear skb */ | |
1214 | err = pr_iucv->message_send(iucv->path, &txmsg, | |
1215 | 0, 0, (void *)skb->data, skb->len); | |
bb664f49 | 1216 | } |
e5374399 EC |
1217 | if (err) { |
1218 | if (err == 3) { | |
1219 | user_id[8] = 0; | |
1220 | memcpy(user_id, iucv->dst_user_id, 8); | |
1221 | appl_id[8] = 0; | |
1222 | memcpy(appl_id, iucv->dst_name, 8); | |
1223 | pr_err( | |
1224 | "Application %s on z/VM guest %s exceeds message limit\n", | |
1225 | appl_id, user_id); | |
1226 | err = -EAGAIN; | |
1227 | } else { | |
1228 | err = -EPIPE; | |
1229 | } | |
eac3731b | 1230 | skb_unlink(skb, &iucv->send_skb_q); |
eac3731b JH |
1231 | goto fail; |
1232 | } | |
eac3731b JH |
1233 | } |
1234 | ||
1235 | release_sock(sk); | |
1236 | return len; | |
1237 | ||
1238 | fail: | |
1239 | kfree_skb(skb); | |
1240 | out: | |
1241 | release_sock(sk); | |
1242 | return err; | |
1243 | } | |
1244 | ||
a006353a EC |
1245 | static struct sk_buff *alloc_iucv_recv_skb(unsigned long len) |
1246 | { | |
1247 | size_t headroom, linear; | |
1248 | struct sk_buff *skb; | |
1249 | int err; | |
1250 | ||
1251 | if (len < PAGE_SIZE) { | |
1252 | headroom = 0; | |
1253 | linear = len; | |
1254 | } else { | |
1255 | headroom = sizeof(struct iucv_array) * (MAX_SKB_FRAGS + 1); | |
1256 | linear = PAGE_SIZE - headroom; | |
1257 | } | |
1258 | skb = alloc_skb_with_frags(headroom + linear, len - linear, | |
1259 | 0, &err, GFP_ATOMIC | GFP_DMA); | |
1260 | WARN_ONCE(!skb, | |
1261 | "alloc of recv iucv skb len=%lu failed with errcode=%d\n", | |
1262 | len, err); | |
1263 | if (skb) { | |
1264 | if (headroom) | |
1265 | skb_reserve(skb, headroom); | |
1266 | skb_put(skb, linear); | |
1267 | skb->len = len; | |
1268 | skb->data_len = len - linear; | |
1269 | } | |
1270 | return skb; | |
1271 | } | |
1272 | ||
bf95d20f HB |
1273 | /* iucv_process_message() - Receive a single outstanding IUCV message |
1274 | * | |
1275 | * Locking: must be called with message_q.lock held | |
1276 | */ | |
f0703c80 UB |
1277 | static void iucv_process_message(struct sock *sk, struct sk_buff *skb, |
1278 | struct iucv_path *path, | |
1279 | struct iucv_message *msg) | |
1280 | { | |
1281 | int rc; | |
b8942e3b HB |
1282 | unsigned int len; |
1283 | ||
1284 | len = iucv_msg_length(msg); | |
f0703c80 | 1285 | |
44b1e6b5 HB |
1286 | /* store msg target class in the second 4 bytes of skb ctrl buffer */ |
1287 | /* Note: the first 4 bytes are reserved for msg tag */ | |
f9c41a62 | 1288 | IUCV_SKB_CB(skb)->class = msg->class; |
44b1e6b5 | 1289 | |
b8942e3b HB |
1290 | /* check for special IPRM messages (e.g. iucv_sock_shutdown) */ |
1291 | if ((msg->flags & IUCV_IPRMDATA) && len > 7) { | |
1292 | if (memcmp(msg->rmmsg, iprm_shutdown, 8) == 0) { | |
1293 | skb->data = NULL; | |
1294 | skb->len = 0; | |
1295 | } | |
f0703c80 | 1296 | } else { |
a006353a EC |
1297 | if (skb_is_nonlinear(skb)) { |
1298 | struct iucv_array *iba = (struct iucv_array *)skb->head; | |
1299 | int i; | |
1300 | ||
1301 | iba[0].address = (u32)(addr_t)skb->data; | |
1302 | iba[0].length = (u32)skb_headlen(skb); | |
1303 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1304 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1305 | ||
1306 | iba[i + 1].address = | |
1307 | (u32)(addr_t)skb_frag_address(frag); | |
1308 | iba[i + 1].length = (u32)skb_frag_size(frag); | |
1309 | } | |
1310 | rc = pr_iucv->message_receive(path, msg, | |
1311 | IUCV_IPBUFLST, | |
1312 | (void *)iba, len, NULL); | |
1313 | } else { | |
1314 | rc = pr_iucv->message_receive(path, msg, | |
6fcd61f7 FB |
1315 | msg->flags & IUCV_IPRMDATA, |
1316 | skb->data, len, NULL); | |
a006353a | 1317 | } |
f0703c80 UB |
1318 | if (rc) { |
1319 | kfree_skb(skb); | |
1320 | return; | |
1321 | } | |
a006353a | 1322 | WARN_ON_ONCE(skb->len != len); |
f0703c80 UB |
1323 | } |
1324 | ||
f9c41a62 | 1325 | IUCV_SKB_CB(skb)->offset = 0; |
8c68b1a0 UB |
1326 | if (sk_filter(sk, skb)) { |
1327 | atomic_inc(&sk->sk_drops); /* skb rejected by filter */ | |
1328 | kfree_skb(skb); | |
1329 | return; | |
1330 | } | |
1331 | if (__sock_queue_rcv_skb(sk, skb)) /* handle rcv queue full */ | |
1332 | skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, skb); | |
f0703c80 UB |
1333 | } |
1334 | ||
bf95d20f HB |
1335 | /* iucv_process_message_q() - Process outstanding IUCV messages |
1336 | * | |
1337 | * Locking: must be called with message_q.lock held | |
1338 | */ | |
f0703c80 UB |
1339 | static void iucv_process_message_q(struct sock *sk) |
1340 | { | |
1341 | struct iucv_sock *iucv = iucv_sk(sk); | |
1342 | struct sk_buff *skb; | |
1343 | struct sock_msg_q *p, *n; | |
1344 | ||
1345 | list_for_each_entry_safe(p, n, &iucv->message_q.list, list) { | |
a006353a | 1346 | skb = alloc_iucv_recv_skb(iucv_msg_length(&p->msg)); |
f0703c80 UB |
1347 | if (!skb) |
1348 | break; | |
1349 | iucv_process_message(sk, skb, p->path, &p->msg); | |
1350 | list_del(&p->list); | |
1351 | kfree(p); | |
1352 | if (!skb_queue_empty(&iucv->backlog_skb_q)) | |
1353 | break; | |
1354 | } | |
1355 | } | |
1356 | ||
1b784140 YX |
1357 | static int iucv_sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1358 | size_t len, int flags) | |
eac3731b JH |
1359 | { |
1360 | int noblock = flags & MSG_DONTWAIT; | |
1361 | struct sock *sk = sock->sk; | |
561e0360 | 1362 | struct iucv_sock *iucv = iucv_sk(sk); |
aa8e71f5 | 1363 | unsigned int copied, rlen; |
9fbd87d4 | 1364 | struct sk_buff *skb, *rskb, *cskb; |
eac3731b | 1365 | int err = 0; |
f9c41a62 | 1366 | u32 offset; |
eac3731b | 1367 | |
aac6399c | 1368 | if ((sk->sk_state == IUCV_DISCONN) && |
f0703c80 UB |
1369 | skb_queue_empty(&iucv->backlog_skb_q) && |
1370 | skb_queue_empty(&sk->sk_receive_queue) && | |
1371 | list_empty(&iucv->message_q.list)) | |
561e0360 JH |
1372 | return 0; |
1373 | ||
eac3731b JH |
1374 | if (flags & (MSG_OOB)) |
1375 | return -EOPNOTSUPP; | |
1376 | ||
60d3705f HB |
1377 | /* receive/dequeue next skb: |
1378 | * the function understands MSG_PEEK and, thus, does not dequeue skb */ | |
eac3731b JH |
1379 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
1380 | if (!skb) { | |
1381 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
1382 | return 0; | |
1383 | return err; | |
1384 | } | |
1385 | ||
f9c41a62 UB |
1386 | offset = IUCV_SKB_CB(skb)->offset; |
1387 | rlen = skb->len - offset; /* real length of skb */ | |
aa8e71f5 | 1388 | copied = min_t(unsigned int, rlen, len); |
82492a35 UB |
1389 | if (!rlen) |
1390 | sk->sk_shutdown = sk->sk_shutdown | RCV_SHUTDOWN; | |
eac3731b | 1391 | |
561e0360 | 1392 | cskb = skb; |
51f3d02b | 1393 | if (skb_copy_datagram_msg(cskb, offset, msg, copied)) { |
802788bf HB |
1394 | if (!(flags & MSG_PEEK)) |
1395 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1396 | return -EFAULT; | |
eac3731b JH |
1397 | } |
1398 | ||
aa8e71f5 HB |
1399 | /* SOCK_SEQPACKET: set MSG_TRUNC if recv buf size is too small */ |
1400 | if (sk->sk_type == SOCK_SEQPACKET) { | |
1401 | if (copied < rlen) | |
1402 | msg->msg_flags |= MSG_TRUNC; | |
1403 | /* each iucv message contains a complete record */ | |
1404 | msg->msg_flags |= MSG_EOR; | |
1405 | } | |
eac3731b | 1406 | |
44b1e6b5 HB |
1407 | /* create control message to store iucv msg target class: |
1408 | * get the trgcls from the control buffer of the skb due to | |
1409 | * fragmentation of original iucv message. */ | |
1410 | err = put_cmsg(msg, SOL_IUCV, SCM_IUCV_TRGCLS, | |
f9c41a62 UB |
1411 | sizeof(IUCV_SKB_CB(skb)->class), |
1412 | (void *)&IUCV_SKB_CB(skb)->class); | |
44b1e6b5 HB |
1413 | if (err) { |
1414 | if (!(flags & MSG_PEEK)) | |
1415 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1416 | return err; | |
1417 | } | |
1418 | ||
eac3731b JH |
1419 | /* Mark read part of skb as used */ |
1420 | if (!(flags & MSG_PEEK)) { | |
eac3731b | 1421 | |
aa8e71f5 HB |
1422 | /* SOCK_STREAM: re-queue skb if it contains unreceived data */ |
1423 | if (sk->sk_type == SOCK_STREAM) { | |
f9c41a62 UB |
1424 | if (copied < rlen) { |
1425 | IUCV_SKB_CB(skb)->offset = offset + copied; | |
2f139a5d | 1426 | skb_queue_head(&sk->sk_receive_queue, skb); |
aa8e71f5 HB |
1427 | goto done; |
1428 | } | |
eac3731b JH |
1429 | } |
1430 | ||
1431 | kfree_skb(skb); | |
800c5eb7 UB |
1432 | if (iucv->transport == AF_IUCV_TRANS_HIPER) { |
1433 | atomic_inc(&iucv->msg_recv); | |
1434 | if (atomic_read(&iucv->msg_recv) > iucv->msglimit) { | |
1435 | WARN_ON(1); | |
1436 | iucv_sock_close(sk); | |
1437 | return -EFAULT; | |
1438 | } | |
1439 | } | |
561e0360 JH |
1440 | |
1441 | /* Queue backlog skbs */ | |
bf95d20f | 1442 | spin_lock_bh(&iucv->message_q.lock); |
f0703c80 | 1443 | rskb = skb_dequeue(&iucv->backlog_skb_q); |
da99f056 | 1444 | while (rskb) { |
f9c41a62 | 1445 | IUCV_SKB_CB(rskb)->offset = 0; |
8c68b1a0 UB |
1446 | if (__sock_queue_rcv_skb(sk, rskb)) { |
1447 | /* handle rcv queue full */ | |
f0703c80 | 1448 | skb_queue_head(&iucv->backlog_skb_q, |
561e0360 JH |
1449 | rskb); |
1450 | break; | |
561e0360 | 1451 | } |
8c68b1a0 | 1452 | rskb = skb_dequeue(&iucv->backlog_skb_q); |
561e0360 | 1453 | } |
f0703c80 | 1454 | if (skb_queue_empty(&iucv->backlog_skb_q)) { |
f0703c80 UB |
1455 | if (!list_empty(&iucv->message_q.list)) |
1456 | iucv_process_message_q(sk); | |
3881ac44 UB |
1457 | if (atomic_read(&iucv->msg_recv) >= |
1458 | iucv->msglimit / 2) { | |
9fbd87d4 | 1459 | err = iucv_send_ctrl(sk, AF_IUCV_FLAG_WIN); |
3881ac44 UB |
1460 | if (err) { |
1461 | sk->sk_state = IUCV_DISCONN; | |
1462 | sk->sk_state_change(sk); | |
1463 | } | |
1464 | } | |
f0703c80 | 1465 | } |
bf95d20f | 1466 | spin_unlock_bh(&iucv->message_q.lock); |
60d3705f | 1467 | } |
eac3731b JH |
1468 | |
1469 | done: | |
aa8e71f5 HB |
1470 | /* SOCK_SEQPACKET: return real length if MSG_TRUNC is set */ |
1471 | if (sk->sk_type == SOCK_SEQPACKET && (flags & MSG_TRUNC)) | |
1472 | copied = rlen; | |
1473 | ||
1474 | return copied; | |
eac3731b JH |
1475 | } |
1476 | ||
ade994f4 | 1477 | static inline __poll_t iucv_accept_poll(struct sock *parent) |
eac3731b JH |
1478 | { |
1479 | struct iucv_sock *isk, *n; | |
1480 | struct sock *sk; | |
1481 | ||
da99f056 | 1482 | list_for_each_entry_safe(isk, n, &iucv_sk(parent)->accept_q, accept_q) { |
eac3731b JH |
1483 | sk = (struct sock *) isk; |
1484 | ||
1485 | if (sk->sk_state == IUCV_CONNECTED) | |
1486 | return POLLIN | POLLRDNORM; | |
1487 | } | |
1488 | ||
1489 | return 0; | |
1490 | } | |
1491 | ||
ade994f4 | 1492 | __poll_t iucv_sock_poll(struct file *file, struct socket *sock, |
eac3731b JH |
1493 | poll_table *wait) |
1494 | { | |
1495 | struct sock *sk = sock->sk; | |
ade994f4 | 1496 | __poll_t mask = 0; |
eac3731b | 1497 | |
aa395145 | 1498 | sock_poll_wait(file, sk_sleep(sk), wait); |
eac3731b JH |
1499 | |
1500 | if (sk->sk_state == IUCV_LISTEN) | |
1501 | return iucv_accept_poll(sk); | |
1502 | ||
1503 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
7d4c04fc | 1504 | mask |= POLLERR | |
8facd5fb | 1505 | (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0); |
eac3731b JH |
1506 | |
1507 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
1508 | mask |= POLLRDHUP; | |
1509 | ||
1510 | if (sk->sk_shutdown == SHUTDOWN_MASK) | |
1511 | mask |= POLLHUP; | |
1512 | ||
1513 | if (!skb_queue_empty(&sk->sk_receive_queue) || | |
da99f056 | 1514 | (sk->sk_shutdown & RCV_SHUTDOWN)) |
eac3731b JH |
1515 | mask |= POLLIN | POLLRDNORM; |
1516 | ||
1517 | if (sk->sk_state == IUCV_CLOSED) | |
1518 | mask |= POLLHUP; | |
1519 | ||
aac6399c | 1520 | if (sk->sk_state == IUCV_DISCONN) |
561e0360 JH |
1521 | mask |= POLLIN; |
1522 | ||
7f1b0ea4 | 1523 | if (sock_writeable(sk) && iucv_below_msglim(sk)) |
eac3731b JH |
1524 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; |
1525 | else | |
9cd3e072 | 1526 | sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk); |
eac3731b JH |
1527 | |
1528 | return mask; | |
1529 | } | |
1530 | ||
1531 | static int iucv_sock_shutdown(struct socket *sock, int how) | |
1532 | { | |
1533 | struct sock *sk = sock->sk; | |
1534 | struct iucv_sock *iucv = iucv_sk(sk); | |
1535 | struct iucv_message txmsg; | |
1536 | int err = 0; | |
eac3731b JH |
1537 | |
1538 | how++; | |
1539 | ||
1540 | if ((how & ~SHUTDOWN_MASK) || !how) | |
1541 | return -EINVAL; | |
1542 | ||
1543 | lock_sock(sk); | |
da99f056 | 1544 | switch (sk->sk_state) { |
82492a35 | 1545 | case IUCV_LISTEN: |
e14ad5fa HB |
1546 | case IUCV_DISCONN: |
1547 | case IUCV_CLOSING: | |
eac3731b JH |
1548 | case IUCV_CLOSED: |
1549 | err = -ENOTCONN; | |
1550 | goto fail; | |
eac3731b | 1551 | default: |
eac3731b JH |
1552 | break; |
1553 | } | |
1554 | ||
1555 | if (how == SEND_SHUTDOWN || how == SHUTDOWN_MASK) { | |
82492a35 UB |
1556 | if (iucv->transport == AF_IUCV_TRANS_IUCV) { |
1557 | txmsg.class = 0; | |
1558 | txmsg.tag = 0; | |
1559 | err = pr_iucv->message_send(iucv->path, &txmsg, | |
1560 | IUCV_IPRMDATA, 0, (void *) iprm_shutdown, 8); | |
1561 | if (err) { | |
1562 | switch (err) { | |
1563 | case 1: | |
1564 | err = -ENOTCONN; | |
1565 | break; | |
1566 | case 2: | |
1567 | err = -ECONNRESET; | |
1568 | break; | |
1569 | default: | |
1570 | err = -ENOTCONN; | |
1571 | break; | |
1572 | } | |
eac3731b | 1573 | } |
82492a35 UB |
1574 | } else |
1575 | iucv_send_ctrl(sk, AF_IUCV_FLAG_SHT); | |
eac3731b JH |
1576 | } |
1577 | ||
82492a35 | 1578 | sk->sk_shutdown |= how; |
eac3731b | 1579 | if (how == RCV_SHUTDOWN || how == SHUTDOWN_MASK) { |
1042cab8 UB |
1580 | if ((iucv->transport == AF_IUCV_TRANS_IUCV) && |
1581 | iucv->path) { | |
82492a35 UB |
1582 | err = pr_iucv->path_quiesce(iucv->path, NULL); |
1583 | if (err) | |
1584 | err = -ENOTCONN; | |
1585 | /* skb_queue_purge(&sk->sk_receive_queue); */ | |
1586 | } | |
eac3731b JH |
1587 | skb_queue_purge(&sk->sk_receive_queue); |
1588 | } | |
1589 | ||
1590 | /* Wake up anyone sleeping in poll */ | |
1591 | sk->sk_state_change(sk); | |
1592 | ||
1593 | fail: | |
1594 | release_sock(sk); | |
1595 | return err; | |
1596 | } | |
1597 | ||
1598 | static int iucv_sock_release(struct socket *sock) | |
1599 | { | |
1600 | struct sock *sk = sock->sk; | |
1601 | int err = 0; | |
1602 | ||
1603 | if (!sk) | |
1604 | return 0; | |
1605 | ||
1606 | iucv_sock_close(sk); | |
1607 | ||
eac3731b JH |
1608 | sock_orphan(sk); |
1609 | iucv_sock_kill(sk); | |
1610 | return err; | |
1611 | } | |
1612 | ||
9d5c5d8f HB |
1613 | /* getsockopt and setsockopt */ |
1614 | static int iucv_sock_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 1615 | char __user *optval, unsigned int optlen) |
9d5c5d8f HB |
1616 | { |
1617 | struct sock *sk = sock->sk; | |
1618 | struct iucv_sock *iucv = iucv_sk(sk); | |
1619 | int val; | |
1620 | int rc; | |
1621 | ||
1622 | if (level != SOL_IUCV) | |
1623 | return -ENOPROTOOPT; | |
1624 | ||
1625 | if (optlen < sizeof(int)) | |
1626 | return -EINVAL; | |
1627 | ||
1628 | if (get_user(val, (int __user *) optval)) | |
1629 | return -EFAULT; | |
1630 | ||
1631 | rc = 0; | |
1632 | ||
1633 | lock_sock(sk); | |
1634 | switch (optname) { | |
1635 | case SO_IPRMDATA_MSG: | |
1636 | if (val) | |
1637 | iucv->flags |= IUCV_IPRMDATA; | |
1638 | else | |
1639 | iucv->flags &= ~IUCV_IPRMDATA; | |
1640 | break; | |
09488e2e HB |
1641 | case SO_MSGLIMIT: |
1642 | switch (sk->sk_state) { | |
1643 | case IUCV_OPEN: | |
1644 | case IUCV_BOUND: | |
1645 | if (val < 1 || val > (u16)(~0)) | |
1646 | rc = -EINVAL; | |
1647 | else | |
1648 | iucv->msglimit = val; | |
1649 | break; | |
1650 | default: | |
1651 | rc = -EINVAL; | |
1652 | break; | |
1653 | } | |
1654 | break; | |
9d5c5d8f HB |
1655 | default: |
1656 | rc = -ENOPROTOOPT; | |
1657 | break; | |
1658 | } | |
1659 | release_sock(sk); | |
1660 | ||
1661 | return rc; | |
1662 | } | |
1663 | ||
1664 | static int iucv_sock_getsockopt(struct socket *sock, int level, int optname, | |
1665 | char __user *optval, int __user *optlen) | |
1666 | { | |
1667 | struct sock *sk = sock->sk; | |
1668 | struct iucv_sock *iucv = iucv_sk(sk); | |
51363b87 UB |
1669 | unsigned int val; |
1670 | int len; | |
9d5c5d8f HB |
1671 | |
1672 | if (level != SOL_IUCV) | |
1673 | return -ENOPROTOOPT; | |
1674 | ||
1675 | if (get_user(len, optlen)) | |
1676 | return -EFAULT; | |
1677 | ||
1678 | if (len < 0) | |
1679 | return -EINVAL; | |
1680 | ||
1681 | len = min_t(unsigned int, len, sizeof(int)); | |
1682 | ||
1683 | switch (optname) { | |
1684 | case SO_IPRMDATA_MSG: | |
1685 | val = (iucv->flags & IUCV_IPRMDATA) ? 1 : 0; | |
1686 | break; | |
09488e2e HB |
1687 | case SO_MSGLIMIT: |
1688 | lock_sock(sk); | |
1689 | val = (iucv->path != NULL) ? iucv->path->msglim /* connected */ | |
1690 | : iucv->msglimit; /* default */ | |
1691 | release_sock(sk); | |
1692 | break; | |
51363b87 UB |
1693 | case SO_MSGSIZE: |
1694 | if (sk->sk_state == IUCV_OPEN) | |
1695 | return -EBADFD; | |
1696 | val = (iucv->hs_dev) ? iucv->hs_dev->mtu - | |
1697 | sizeof(struct af_iucv_trans_hdr) - ETH_HLEN : | |
1698 | 0x7fffffff; | |
1699 | break; | |
9d5c5d8f HB |
1700 | default: |
1701 | return -ENOPROTOOPT; | |
1702 | } | |
1703 | ||
1704 | if (put_user(len, optlen)) | |
1705 | return -EFAULT; | |
1706 | if (copy_to_user(optval, &val, len)) | |
1707 | return -EFAULT; | |
1708 | ||
1709 | return 0; | |
1710 | } | |
1711 | ||
1712 | ||
eac3731b JH |
1713 | /* Callback wrappers - called from iucv base support */ |
1714 | static int iucv_callback_connreq(struct iucv_path *path, | |
1715 | u8 ipvmid[8], u8 ipuser[16]) | |
1716 | { | |
1717 | unsigned char user_data[16]; | |
1718 | unsigned char nuser_data[16]; | |
1719 | unsigned char src_name[8]; | |
eac3731b JH |
1720 | struct sock *sk, *nsk; |
1721 | struct iucv_sock *iucv, *niucv; | |
1722 | int err; | |
1723 | ||
1724 | memcpy(src_name, ipuser, 8); | |
1725 | EBCASC(src_name, 8); | |
1726 | /* Find out if this path belongs to af_iucv. */ | |
1727 | read_lock(&iucv_sk_list.lock); | |
1728 | iucv = NULL; | |
febca281 | 1729 | sk = NULL; |
b67bfe0d | 1730 | sk_for_each(sk, &iucv_sk_list.head) |
eac3731b JH |
1731 | if (sk->sk_state == IUCV_LISTEN && |
1732 | !memcmp(&iucv_sk(sk)->src_name, src_name, 8)) { | |
1733 | /* | |
1734 | * Found a listening socket with | |
1735 | * src_name == ipuser[0-7]. | |
1736 | */ | |
1737 | iucv = iucv_sk(sk); | |
1738 | break; | |
1739 | } | |
1740 | read_unlock(&iucv_sk_list.lock); | |
1741 | if (!iucv) | |
1742 | /* No socket found, not one of our paths. */ | |
1743 | return -EINVAL; | |
1744 | ||
1745 | bh_lock_sock(sk); | |
1746 | ||
1747 | /* Check if parent socket is listening */ | |
1748 | low_nmcpy(user_data, iucv->src_name); | |
1749 | high_nmcpy(user_data, iucv->dst_name); | |
1750 | ASCEBC(user_data, sizeof(user_data)); | |
1751 | if (sk->sk_state != IUCV_LISTEN) { | |
6fcd61f7 | 1752 | err = pr_iucv->path_sever(path, user_data); |
65dbd7c2 | 1753 | iucv_path_free(path); |
eac3731b JH |
1754 | goto fail; |
1755 | } | |
1756 | ||
1757 | /* Check for backlog size */ | |
1758 | if (sk_acceptq_is_full(sk)) { | |
6fcd61f7 | 1759 | err = pr_iucv->path_sever(path, user_data); |
65dbd7c2 | 1760 | iucv_path_free(path); |
eac3731b JH |
1761 | goto fail; |
1762 | } | |
1763 | ||
1764 | /* Create the new socket */ | |
11aa9c28 | 1765 | nsk = iucv_sock_alloc(NULL, sk->sk_type, GFP_ATOMIC, 0); |
da99f056 | 1766 | if (!nsk) { |
6fcd61f7 | 1767 | err = pr_iucv->path_sever(path, user_data); |
65dbd7c2 | 1768 | iucv_path_free(path); |
eac3731b JH |
1769 | goto fail; |
1770 | } | |
1771 | ||
1772 | niucv = iucv_sk(nsk); | |
1773 | iucv_sock_init(nsk, sk); | |
1774 | ||
1775 | /* Set the new iucv_sock */ | |
1776 | memcpy(niucv->dst_name, ipuser + 8, 8); | |
1777 | EBCASC(niucv->dst_name, 8); | |
1778 | memcpy(niucv->dst_user_id, ipvmid, 8); | |
1779 | memcpy(niucv->src_name, iucv->src_name, 8); | |
1780 | memcpy(niucv->src_user_id, iucv->src_user_id, 8); | |
1781 | niucv->path = path; | |
1782 | ||
1783 | /* Call iucv_accept */ | |
1784 | high_nmcpy(nuser_data, ipuser + 8); | |
1785 | memcpy(nuser_data + 8, niucv->src_name, 8); | |
1786 | ASCEBC(nuser_data + 8, 8); | |
1787 | ||
09488e2e HB |
1788 | /* set message limit for path based on msglimit of accepting socket */ |
1789 | niucv->msglimit = iucv->msglimit; | |
1790 | path->msglim = iucv->msglimit; | |
6fcd61f7 | 1791 | err = pr_iucv->path_accept(path, &af_iucv_handler, nuser_data, nsk); |
da99f056 | 1792 | if (err) { |
7d316b94 | 1793 | iucv_sever_path(nsk, 1); |
65dbd7c2 | 1794 | iucv_sock_kill(nsk); |
eac3731b JH |
1795 | goto fail; |
1796 | } | |
1797 | ||
1798 | iucv_accept_enqueue(sk, nsk); | |
1799 | ||
1800 | /* Wake up accept */ | |
1801 | nsk->sk_state = IUCV_CONNECTED; | |
676d2369 | 1802 | sk->sk_data_ready(sk); |
eac3731b JH |
1803 | err = 0; |
1804 | fail: | |
1805 | bh_unlock_sock(sk); | |
1806 | return 0; | |
1807 | } | |
1808 | ||
1809 | static void iucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) | |
1810 | { | |
1811 | struct sock *sk = path->private; | |
1812 | ||
1813 | sk->sk_state = IUCV_CONNECTED; | |
1814 | sk->sk_state_change(sk); | |
1815 | } | |
1816 | ||
1817 | static void iucv_callback_rx(struct iucv_path *path, struct iucv_message *msg) | |
1818 | { | |
1819 | struct sock *sk = path->private; | |
561e0360 | 1820 | struct iucv_sock *iucv = iucv_sk(sk); |
f0703c80 UB |
1821 | struct sk_buff *skb; |
1822 | struct sock_msg_q *save_msg; | |
1823 | int len; | |
561e0360 | 1824 | |
fe86e54e | 1825 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
6fcd61f7 | 1826 | pr_iucv->message_reject(path, msg); |
eac3731b | 1827 | return; |
fe86e54e | 1828 | } |
eac3731b | 1829 | |
3fa6b5ad | 1830 | spin_lock(&iucv->message_q.lock); |
eac3731b | 1831 | |
f0703c80 UB |
1832 | if (!list_empty(&iucv->message_q.list) || |
1833 | !skb_queue_empty(&iucv->backlog_skb_q)) | |
1834 | goto save_message; | |
1835 | ||
1836 | len = atomic_read(&sk->sk_rmem_alloc); | |
87fb4b7b | 1837 | len += SKB_TRUESIZE(iucv_msg_length(msg)); |
f0703c80 UB |
1838 | if (len > sk->sk_rcvbuf) |
1839 | goto save_message; | |
1840 | ||
a006353a | 1841 | skb = alloc_iucv_recv_skb(iucv_msg_length(msg)); |
f0703c80 UB |
1842 | if (!skb) |
1843 | goto save_message; | |
eac3731b | 1844 | |
f0703c80 | 1845 | iucv_process_message(sk, skb, path, msg); |
3fa6b5ad | 1846 | goto out_unlock; |
eac3731b | 1847 | |
f0703c80 UB |
1848 | save_message: |
1849 | save_msg = kzalloc(sizeof(struct sock_msg_q), GFP_ATOMIC | GFP_DMA); | |
d4444722 | 1850 | if (!save_msg) |
a56635a5 | 1851 | goto out_unlock; |
f0703c80 UB |
1852 | save_msg->path = path; |
1853 | save_msg->msg = *msg; | |
eac3731b | 1854 | |
f0703c80 | 1855 | list_add_tail(&save_msg->list, &iucv->message_q.list); |
3fa6b5ad HB |
1856 | |
1857 | out_unlock: | |
f0703c80 | 1858 | spin_unlock(&iucv->message_q.lock); |
eac3731b JH |
1859 | } |
1860 | ||
1861 | static void iucv_callback_txdone(struct iucv_path *path, | |
1862 | struct iucv_message *msg) | |
1863 | { | |
1864 | struct sock *sk = path->private; | |
f2a77991 | 1865 | struct sk_buff *this = NULL; |
eac3731b JH |
1866 | struct sk_buff_head *list = &iucv_sk(sk)->send_skb_q; |
1867 | struct sk_buff *list_skb = list->next; | |
1868 | unsigned long flags; | |
1869 | ||
7d316b94 | 1870 | bh_lock_sock(sk); |
f2a77991 | 1871 | if (!skb_queue_empty(list)) { |
561e0360 JH |
1872 | spin_lock_irqsave(&list->lock, flags); |
1873 | ||
f2a77991 | 1874 | while (list_skb != (struct sk_buff *)list) { |
f5738e2e | 1875 | if (msg->tag == IUCV_SKB_CB(list_skb)->tag) { |
f2a77991 UB |
1876 | this = list_skb; |
1877 | break; | |
1878 | } | |
561e0360 | 1879 | list_skb = list_skb->next; |
f2a77991 UB |
1880 | } |
1881 | if (this) | |
1882 | __skb_unlink(this, list); | |
561e0360 JH |
1883 | |
1884 | spin_unlock_irqrestore(&list->lock, flags); | |
eac3731b | 1885 | |
0ea920d2 HB |
1886 | if (this) { |
1887 | kfree_skb(this); | |
1888 | /* wake up any process waiting for sending */ | |
1889 | iucv_sock_wake_msglim(sk); | |
1890 | } | |
561e0360 | 1891 | } |
eac3731b | 1892 | |
da99f056 | 1893 | if (sk->sk_state == IUCV_CLOSING) { |
561e0360 JH |
1894 | if (skb_queue_empty(&iucv_sk(sk)->send_skb_q)) { |
1895 | sk->sk_state = IUCV_CLOSED; | |
1896 | sk->sk_state_change(sk); | |
1897 | } | |
1898 | } | |
7d316b94 | 1899 | bh_unlock_sock(sk); |
eac3731b | 1900 | |
eac3731b JH |
1901 | } |
1902 | ||
1903 | static void iucv_callback_connrej(struct iucv_path *path, u8 ipuser[16]) | |
1904 | { | |
1905 | struct sock *sk = path->private; | |
1906 | ||
7d316b94 UB |
1907 | if (sk->sk_state == IUCV_CLOSED) |
1908 | return; | |
1909 | ||
1910 | bh_lock_sock(sk); | |
1911 | iucv_sever_path(sk, 1); | |
aac6399c | 1912 | sk->sk_state = IUCV_DISCONN; |
eac3731b JH |
1913 | |
1914 | sk->sk_state_change(sk); | |
7d316b94 | 1915 | bh_unlock_sock(sk); |
eac3731b JH |
1916 | } |
1917 | ||
af88b52d HB |
1918 | /* called if the other communication side shuts down its RECV direction; |
1919 | * in turn, the callback sets SEND_SHUTDOWN to disable sending of data. | |
1920 | */ | |
1921 | static void iucv_callback_shutdown(struct iucv_path *path, u8 ipuser[16]) | |
1922 | { | |
1923 | struct sock *sk = path->private; | |
1924 | ||
1925 | bh_lock_sock(sk); | |
1926 | if (sk->sk_state != IUCV_CLOSED) { | |
1927 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
1928 | sk->sk_state_change(sk); | |
1929 | } | |
1930 | bh_unlock_sock(sk); | |
1931 | } | |
1932 | ||
3881ac44 UB |
1933 | /***************** HiperSockets transport callbacks ********************/ |
1934 | static void afiucv_swap_src_dest(struct sk_buff *skb) | |
1935 | { | |
1936 | struct af_iucv_trans_hdr *trans_hdr = | |
1937 | (struct af_iucv_trans_hdr *)skb->data; | |
1938 | char tmpID[8]; | |
1939 | char tmpName[8]; | |
1940 | ||
1941 | ASCEBC(trans_hdr->destUserID, sizeof(trans_hdr->destUserID)); | |
1942 | ASCEBC(trans_hdr->destAppName, sizeof(trans_hdr->destAppName)); | |
1943 | ASCEBC(trans_hdr->srcUserID, sizeof(trans_hdr->srcUserID)); | |
1944 | ASCEBC(trans_hdr->srcAppName, sizeof(trans_hdr->srcAppName)); | |
1945 | memcpy(tmpID, trans_hdr->srcUserID, 8); | |
1946 | memcpy(tmpName, trans_hdr->srcAppName, 8); | |
1947 | memcpy(trans_hdr->srcUserID, trans_hdr->destUserID, 8); | |
1948 | memcpy(trans_hdr->srcAppName, trans_hdr->destAppName, 8); | |
1949 | memcpy(trans_hdr->destUserID, tmpID, 8); | |
1950 | memcpy(trans_hdr->destAppName, tmpName, 8); | |
1951 | skb_push(skb, ETH_HLEN); | |
1952 | memset(skb->data, 0, ETH_HLEN); | |
1953 | } | |
1954 | ||
1955 | /** | |
1956 | * afiucv_hs_callback_syn - react on received SYN | |
1957 | **/ | |
1958 | static int afiucv_hs_callback_syn(struct sock *sk, struct sk_buff *skb) | |
1959 | { | |
1960 | struct sock *nsk; | |
1961 | struct iucv_sock *iucv, *niucv; | |
1962 | struct af_iucv_trans_hdr *trans_hdr; | |
1963 | int err; | |
1964 | ||
1965 | iucv = iucv_sk(sk); | |
1966 | trans_hdr = (struct af_iucv_trans_hdr *)skb->data; | |
1967 | if (!iucv) { | |
1968 | /* no sock - connection refused */ | |
1969 | afiucv_swap_src_dest(skb); | |
1970 | trans_hdr->flags = AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_FIN; | |
1971 | err = dev_queue_xmit(skb); | |
1972 | goto out; | |
1973 | } | |
1974 | ||
11aa9c28 | 1975 | nsk = iucv_sock_alloc(NULL, sk->sk_type, GFP_ATOMIC, 0); |
3881ac44 UB |
1976 | bh_lock_sock(sk); |
1977 | if ((sk->sk_state != IUCV_LISTEN) || | |
1978 | sk_acceptq_is_full(sk) || | |
1979 | !nsk) { | |
1980 | /* error on server socket - connection refused */ | |
3881ac44 UB |
1981 | afiucv_swap_src_dest(skb); |
1982 | trans_hdr->flags = AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_FIN; | |
1983 | err = dev_queue_xmit(skb); | |
4d520f62 | 1984 | iucv_sock_kill(nsk); |
3881ac44 UB |
1985 | bh_unlock_sock(sk); |
1986 | goto out; | |
1987 | } | |
1988 | ||
1989 | niucv = iucv_sk(nsk); | |
1990 | iucv_sock_init(nsk, sk); | |
1991 | niucv->transport = AF_IUCV_TRANS_HIPER; | |
1992 | niucv->msglimit = iucv->msglimit; | |
1993 | if (!trans_hdr->window) | |
1994 | niucv->msglimit_peer = IUCV_HIPER_MSGLIM_DEFAULT; | |
1995 | else | |
1996 | niucv->msglimit_peer = trans_hdr->window; | |
1997 | memcpy(niucv->dst_name, trans_hdr->srcAppName, 8); | |
1998 | memcpy(niucv->dst_user_id, trans_hdr->srcUserID, 8); | |
1999 | memcpy(niucv->src_name, iucv->src_name, 8); | |
2000 | memcpy(niucv->src_user_id, iucv->src_user_id, 8); | |
2001 | nsk->sk_bound_dev_if = sk->sk_bound_dev_if; | |
800c5eb7 UB |
2002 | niucv->hs_dev = iucv->hs_dev; |
2003 | dev_hold(niucv->hs_dev); | |
3881ac44 UB |
2004 | afiucv_swap_src_dest(skb); |
2005 | trans_hdr->flags = AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_ACK; | |
2006 | trans_hdr->window = niucv->msglimit; | |
2007 | /* if receiver acks the xmit connection is established */ | |
2008 | err = dev_queue_xmit(skb); | |
2009 | if (!err) { | |
2010 | iucv_accept_enqueue(sk, nsk); | |
2011 | nsk->sk_state = IUCV_CONNECTED; | |
676d2369 | 2012 | sk->sk_data_ready(sk); |
3881ac44 UB |
2013 | } else |
2014 | iucv_sock_kill(nsk); | |
2015 | bh_unlock_sock(sk); | |
2016 | ||
2017 | out: | |
2018 | return NET_RX_SUCCESS; | |
2019 | } | |
2020 | ||
2021 | /** | |
2022 | * afiucv_hs_callback_synack() - react on received SYN-ACK | |
2023 | **/ | |
2024 | static int afiucv_hs_callback_synack(struct sock *sk, struct sk_buff *skb) | |
2025 | { | |
2026 | struct iucv_sock *iucv = iucv_sk(sk); | |
2027 | struct af_iucv_trans_hdr *trans_hdr = | |
2028 | (struct af_iucv_trans_hdr *)skb->data; | |
2029 | ||
2030 | if (!iucv) | |
2031 | goto out; | |
2032 | if (sk->sk_state != IUCV_BOUND) | |
2033 | goto out; | |
2034 | bh_lock_sock(sk); | |
2035 | iucv->msglimit_peer = trans_hdr->window; | |
2036 | sk->sk_state = IUCV_CONNECTED; | |
2037 | sk->sk_state_change(sk); | |
2038 | bh_unlock_sock(sk); | |
2039 | out: | |
2040 | kfree_skb(skb); | |
2041 | return NET_RX_SUCCESS; | |
2042 | } | |
2043 | ||
2044 | /** | |
2045 | * afiucv_hs_callback_synfin() - react on received SYN_FIN | |
2046 | **/ | |
2047 | static int afiucv_hs_callback_synfin(struct sock *sk, struct sk_buff *skb) | |
2048 | { | |
2049 | struct iucv_sock *iucv = iucv_sk(sk); | |
2050 | ||
2051 | if (!iucv) | |
2052 | goto out; | |
2053 | if (sk->sk_state != IUCV_BOUND) | |
2054 | goto out; | |
2055 | bh_lock_sock(sk); | |
2056 | sk->sk_state = IUCV_DISCONN; | |
2057 | sk->sk_state_change(sk); | |
2058 | bh_unlock_sock(sk); | |
2059 | out: | |
2060 | kfree_skb(skb); | |
2061 | return NET_RX_SUCCESS; | |
2062 | } | |
2063 | ||
2064 | /** | |
2065 | * afiucv_hs_callback_fin() - react on received FIN | |
2066 | **/ | |
2067 | static int afiucv_hs_callback_fin(struct sock *sk, struct sk_buff *skb) | |
2068 | { | |
2069 | struct iucv_sock *iucv = iucv_sk(sk); | |
2070 | ||
2071 | /* other end of connection closed */ | |
800c5eb7 UB |
2072 | if (!iucv) |
2073 | goto out; | |
2074 | bh_lock_sock(sk); | |
2075 | if (sk->sk_state == IUCV_CONNECTED) { | |
aac6399c | 2076 | sk->sk_state = IUCV_DISCONN; |
3881ac44 | 2077 | sk->sk_state_change(sk); |
3881ac44 | 2078 | } |
800c5eb7 UB |
2079 | bh_unlock_sock(sk); |
2080 | out: | |
3881ac44 UB |
2081 | kfree_skb(skb); |
2082 | return NET_RX_SUCCESS; | |
2083 | } | |
2084 | ||
2085 | /** | |
2086 | * afiucv_hs_callback_win() - react on received WIN | |
2087 | **/ | |
2088 | static int afiucv_hs_callback_win(struct sock *sk, struct sk_buff *skb) | |
2089 | { | |
2090 | struct iucv_sock *iucv = iucv_sk(sk); | |
2091 | struct af_iucv_trans_hdr *trans_hdr = | |
2092 | (struct af_iucv_trans_hdr *)skb->data; | |
2093 | ||
2094 | if (!iucv) | |
2095 | return NET_RX_SUCCESS; | |
2096 | ||
2097 | if (sk->sk_state != IUCV_CONNECTED) | |
2098 | return NET_RX_SUCCESS; | |
2099 | ||
2100 | atomic_sub(trans_hdr->window, &iucv->msg_sent); | |
2101 | iucv_sock_wake_msglim(sk); | |
2102 | return NET_RX_SUCCESS; | |
2103 | } | |
2104 | ||
2105 | /** | |
2106 | * afiucv_hs_callback_rx() - react on received data | |
2107 | **/ | |
2108 | static int afiucv_hs_callback_rx(struct sock *sk, struct sk_buff *skb) | |
2109 | { | |
2110 | struct iucv_sock *iucv = iucv_sk(sk); | |
2111 | ||
2112 | if (!iucv) { | |
2113 | kfree_skb(skb); | |
2114 | return NET_RX_SUCCESS; | |
2115 | } | |
2116 | ||
2117 | if (sk->sk_state != IUCV_CONNECTED) { | |
2118 | kfree_skb(skb); | |
2119 | return NET_RX_SUCCESS; | |
2120 | } | |
2121 | ||
82492a35 UB |
2122 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
2123 | kfree_skb(skb); | |
2124 | return NET_RX_SUCCESS; | |
2125 | } | |
2126 | ||
979f66b3 | 2127 | /* write stuff from iucv_msg to skb cb */ |
3881ac44 UB |
2128 | skb_pull(skb, sizeof(struct af_iucv_trans_hdr)); |
2129 | skb_reset_transport_header(skb); | |
2130 | skb_reset_network_header(skb); | |
f9c41a62 | 2131 | IUCV_SKB_CB(skb)->offset = 0; |
8c68b1a0 UB |
2132 | if (sk_filter(sk, skb)) { |
2133 | atomic_inc(&sk->sk_drops); /* skb rejected by filter */ | |
2134 | kfree_skb(skb); | |
2135 | return NET_RX_SUCCESS; | |
2136 | } | |
2137 | ||
3881ac44 UB |
2138 | spin_lock(&iucv->message_q.lock); |
2139 | if (skb_queue_empty(&iucv->backlog_skb_q)) { | |
8c68b1a0 | 2140 | if (__sock_queue_rcv_skb(sk, skb)) |
3881ac44 UB |
2141 | /* handle rcv queue full */ |
2142 | skb_queue_tail(&iucv->backlog_skb_q, skb); | |
3881ac44 UB |
2143 | } else |
2144 | skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, skb); | |
2145 | spin_unlock(&iucv->message_q.lock); | |
2146 | return NET_RX_SUCCESS; | |
2147 | } | |
2148 | ||
2149 | /** | |
2150 | * afiucv_hs_rcv() - base function for arriving data through HiperSockets | |
2151 | * transport | |
2152 | * called from netif RX softirq | |
2153 | **/ | |
2154 | static int afiucv_hs_rcv(struct sk_buff *skb, struct net_device *dev, | |
2155 | struct packet_type *pt, struct net_device *orig_dev) | |
2156 | { | |
3881ac44 UB |
2157 | struct sock *sk; |
2158 | struct iucv_sock *iucv; | |
2159 | struct af_iucv_trans_hdr *trans_hdr; | |
2160 | char nullstring[8]; | |
2161 | int err = 0; | |
2162 | ||
979f66b3 EC |
2163 | if (skb->len < (ETH_HLEN + sizeof(struct af_iucv_trans_hdr))) { |
2164 | WARN_ONCE(1, "AF_IUCV too short skb, len=%d, min=%d", | |
2165 | (int)skb->len, | |
2166 | (int)(ETH_HLEN + sizeof(struct af_iucv_trans_hdr))); | |
2167 | kfree_skb(skb); | |
2168 | return NET_RX_SUCCESS; | |
2169 | } | |
2170 | if (skb_headlen(skb) < (ETH_HLEN + sizeof(struct af_iucv_trans_hdr))) | |
2171 | if (skb_linearize(skb)) { | |
2172 | WARN_ONCE(1, "AF_IUCV skb_linearize failed, len=%d", | |
2173 | (int)skb->len); | |
2174 | kfree_skb(skb); | |
2175 | return NET_RX_SUCCESS; | |
2176 | } | |
3881ac44 UB |
2177 | skb_pull(skb, ETH_HLEN); |
2178 | trans_hdr = (struct af_iucv_trans_hdr *)skb->data; | |
2179 | EBCASC(trans_hdr->destAppName, sizeof(trans_hdr->destAppName)); | |
2180 | EBCASC(trans_hdr->destUserID, sizeof(trans_hdr->destUserID)); | |
2181 | EBCASC(trans_hdr->srcAppName, sizeof(trans_hdr->srcAppName)); | |
2182 | EBCASC(trans_hdr->srcUserID, sizeof(trans_hdr->srcUserID)); | |
2183 | memset(nullstring, 0, sizeof(nullstring)); | |
2184 | iucv = NULL; | |
2185 | sk = NULL; | |
2186 | read_lock(&iucv_sk_list.lock); | |
b67bfe0d | 2187 | sk_for_each(sk, &iucv_sk_list.head) { |
3881ac44 UB |
2188 | if (trans_hdr->flags == AF_IUCV_FLAG_SYN) { |
2189 | if ((!memcmp(&iucv_sk(sk)->src_name, | |
2190 | trans_hdr->destAppName, 8)) && | |
2191 | (!memcmp(&iucv_sk(sk)->src_user_id, | |
2192 | trans_hdr->destUserID, 8)) && | |
2193 | (!memcmp(&iucv_sk(sk)->dst_name, nullstring, 8)) && | |
2194 | (!memcmp(&iucv_sk(sk)->dst_user_id, | |
2195 | nullstring, 8))) { | |
2196 | iucv = iucv_sk(sk); | |
2197 | break; | |
2198 | } | |
2199 | } else { | |
2200 | if ((!memcmp(&iucv_sk(sk)->src_name, | |
2201 | trans_hdr->destAppName, 8)) && | |
2202 | (!memcmp(&iucv_sk(sk)->src_user_id, | |
2203 | trans_hdr->destUserID, 8)) && | |
2204 | (!memcmp(&iucv_sk(sk)->dst_name, | |
2205 | trans_hdr->srcAppName, 8)) && | |
2206 | (!memcmp(&iucv_sk(sk)->dst_user_id, | |
2207 | trans_hdr->srcUserID, 8))) { | |
2208 | iucv = iucv_sk(sk); | |
2209 | break; | |
2210 | } | |
2211 | } | |
2212 | } | |
2213 | read_unlock(&iucv_sk_list.lock); | |
2214 | if (!iucv) | |
2215 | sk = NULL; | |
2216 | ||
2217 | /* no sock | |
2218 | how should we send with no sock | |
2219 | 1) send without sock no send rc checking? | |
2220 | 2) introduce default sock to handle this cases | |
2221 | ||
2222 | SYN -> send SYN|ACK in good case, send SYN|FIN in bad case | |
2223 | data -> send FIN | |
2224 | SYN|ACK, SYN|FIN, FIN -> no action? */ | |
2225 | ||
2226 | switch (trans_hdr->flags) { | |
2227 | case AF_IUCV_FLAG_SYN: | |
2228 | /* connect request */ | |
2229 | err = afiucv_hs_callback_syn(sk, skb); | |
2230 | break; | |
2231 | case (AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_ACK): | |
2232 | /* connect request confirmed */ | |
2233 | err = afiucv_hs_callback_synack(sk, skb); | |
2234 | break; | |
2235 | case (AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_FIN): | |
2236 | /* connect request refused */ | |
2237 | err = afiucv_hs_callback_synfin(sk, skb); | |
2238 | break; | |
2239 | case (AF_IUCV_FLAG_FIN): | |
2240 | /* close request */ | |
2241 | err = afiucv_hs_callback_fin(sk, skb); | |
2242 | break; | |
2243 | case (AF_IUCV_FLAG_WIN): | |
2244 | err = afiucv_hs_callback_win(sk, skb); | |
800c5eb7 UB |
2245 | if (skb->len == sizeof(struct af_iucv_trans_hdr)) { |
2246 | kfree_skb(skb); | |
2247 | break; | |
2248 | } | |
82492a35 UB |
2249 | /* fall through and receive non-zero length data */ |
2250 | case (AF_IUCV_FLAG_SHT): | |
2251 | /* shutdown request */ | |
2252 | /* fall through and receive zero length data */ | |
3881ac44 UB |
2253 | case 0: |
2254 | /* plain data frame */ | |
f9c41a62 | 2255 | IUCV_SKB_CB(skb)->class = trans_hdr->iucv_hdr.class; |
3881ac44 UB |
2256 | err = afiucv_hs_callback_rx(sk, skb); |
2257 | break; | |
2258 | default: | |
2259 | ; | |
2260 | } | |
2261 | ||
2262 | return err; | |
2263 | } | |
2264 | ||
2265 | /** | |
2266 | * afiucv_hs_callback_txnotify() - handle send notifcations from HiperSockets | |
2267 | * transport | |
2268 | **/ | |
2269 | static void afiucv_hs_callback_txnotify(struct sk_buff *skb, | |
2270 | enum iucv_tx_notify n) | |
2271 | { | |
2272 | struct sock *isk = skb->sk; | |
2273 | struct sock *sk = NULL; | |
2274 | struct iucv_sock *iucv = NULL; | |
2275 | struct sk_buff_head *list; | |
2276 | struct sk_buff *list_skb; | |
800c5eb7 | 2277 | struct sk_buff *nskb; |
3881ac44 | 2278 | unsigned long flags; |
3881ac44 | 2279 | |
800c5eb7 | 2280 | read_lock_irqsave(&iucv_sk_list.lock, flags); |
b67bfe0d | 2281 | sk_for_each(sk, &iucv_sk_list.head) |
3881ac44 UB |
2282 | if (sk == isk) { |
2283 | iucv = iucv_sk(sk); | |
2284 | break; | |
2285 | } | |
800c5eb7 | 2286 | read_unlock_irqrestore(&iucv_sk_list.lock, flags); |
3881ac44 | 2287 | |
800c5eb7 | 2288 | if (!iucv || sock_flag(sk, SOCK_ZAPPED)) |
3881ac44 UB |
2289 | return; |
2290 | ||
3881ac44 | 2291 | list = &iucv->send_skb_q; |
800c5eb7 | 2292 | spin_lock_irqsave(&list->lock, flags); |
3881ac44 UB |
2293 | if (skb_queue_empty(list)) |
2294 | goto out_unlock; | |
800c5eb7 UB |
2295 | list_skb = list->next; |
2296 | nskb = list_skb->next; | |
3881ac44 UB |
2297 | while (list_skb != (struct sk_buff *)list) { |
2298 | if (skb_shinfo(list_skb) == skb_shinfo(skb)) { | |
3881ac44 UB |
2299 | switch (n) { |
2300 | case TX_NOTIFY_OK: | |
800c5eb7 UB |
2301 | __skb_unlink(list_skb, list); |
2302 | kfree_skb(list_skb); | |
3881ac44 | 2303 | iucv_sock_wake_msglim(sk); |
3881ac44 UB |
2304 | break; |
2305 | case TX_NOTIFY_PENDING: | |
2306 | atomic_inc(&iucv->pendings); | |
2307 | break; | |
2308 | case TX_NOTIFY_DELAYED_OK: | |
800c5eb7 | 2309 | __skb_unlink(list_skb, list); |
3881ac44 UB |
2310 | atomic_dec(&iucv->pendings); |
2311 | if (atomic_read(&iucv->pendings) <= 0) | |
2312 | iucv_sock_wake_msglim(sk); | |
800c5eb7 | 2313 | kfree_skb(list_skb); |
3881ac44 UB |
2314 | break; |
2315 | case TX_NOTIFY_UNREACHABLE: | |
2316 | case TX_NOTIFY_DELAYED_UNREACHABLE: | |
2317 | case TX_NOTIFY_TPQFULL: /* not yet used */ | |
2318 | case TX_NOTIFY_GENERALERROR: | |
2319 | case TX_NOTIFY_DELAYED_GENERALERROR: | |
800c5eb7 UB |
2320 | __skb_unlink(list_skb, list); |
2321 | kfree_skb(list_skb); | |
2322 | if (sk->sk_state == IUCV_CONNECTED) { | |
2323 | sk->sk_state = IUCV_DISCONN; | |
2324 | sk->sk_state_change(sk); | |
2325 | } | |
3881ac44 UB |
2326 | break; |
2327 | } | |
2328 | break; | |
2329 | } | |
800c5eb7 UB |
2330 | list_skb = nskb; |
2331 | nskb = nskb->next; | |
3881ac44 | 2332 | } |
800c5eb7 | 2333 | out_unlock: |
3881ac44 UB |
2334 | spin_unlock_irqrestore(&list->lock, flags); |
2335 | ||
42bd48e0 UB |
2336 | if (sk->sk_state == IUCV_CLOSING) { |
2337 | if (skb_queue_empty(&iucv_sk(sk)->send_skb_q)) { | |
2338 | sk->sk_state = IUCV_CLOSED; | |
2339 | sk->sk_state_change(sk); | |
2340 | } | |
2341 | } | |
2342 | ||
3881ac44 | 2343 | } |
9fbd87d4 UB |
2344 | |
2345 | /* | |
2346 | * afiucv_netdev_event: handle netdev notifier chain events | |
2347 | */ | |
2348 | static int afiucv_netdev_event(struct notifier_block *this, | |
2349 | unsigned long event, void *ptr) | |
2350 | { | |
351638e7 | 2351 | struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); |
9fbd87d4 UB |
2352 | struct sock *sk; |
2353 | struct iucv_sock *iucv; | |
2354 | ||
2355 | switch (event) { | |
2356 | case NETDEV_REBOOT: | |
2357 | case NETDEV_GOING_DOWN: | |
b67bfe0d | 2358 | sk_for_each(sk, &iucv_sk_list.head) { |
9fbd87d4 UB |
2359 | iucv = iucv_sk(sk); |
2360 | if ((iucv->hs_dev == event_dev) && | |
2361 | (sk->sk_state == IUCV_CONNECTED)) { | |
2362 | if (event == NETDEV_GOING_DOWN) | |
2363 | iucv_send_ctrl(sk, AF_IUCV_FLAG_FIN); | |
2364 | sk->sk_state = IUCV_DISCONN; | |
2365 | sk->sk_state_change(sk); | |
2366 | } | |
2367 | } | |
2368 | break; | |
2369 | case NETDEV_DOWN: | |
2370 | case NETDEV_UNREGISTER: | |
2371 | default: | |
2372 | break; | |
2373 | } | |
2374 | return NOTIFY_DONE; | |
2375 | } | |
2376 | ||
2377 | static struct notifier_block afiucv_netdev_notifier = { | |
2378 | .notifier_call = afiucv_netdev_event, | |
2379 | }; | |
2380 | ||
5708e868 | 2381 | static const struct proto_ops iucv_sock_ops = { |
eac3731b JH |
2382 | .family = PF_IUCV, |
2383 | .owner = THIS_MODULE, | |
2384 | .release = iucv_sock_release, | |
2385 | .bind = iucv_sock_bind, | |
2386 | .connect = iucv_sock_connect, | |
2387 | .listen = iucv_sock_listen, | |
2388 | .accept = iucv_sock_accept, | |
2389 | .getname = iucv_sock_getname, | |
2390 | .sendmsg = iucv_sock_sendmsg, | |
2391 | .recvmsg = iucv_sock_recvmsg, | |
2392 | .poll = iucv_sock_poll, | |
2393 | .ioctl = sock_no_ioctl, | |
2394 | .mmap = sock_no_mmap, | |
2395 | .socketpair = sock_no_socketpair, | |
2396 | .shutdown = iucv_sock_shutdown, | |
9d5c5d8f HB |
2397 | .setsockopt = iucv_sock_setsockopt, |
2398 | .getsockopt = iucv_sock_getsockopt, | |
eac3731b JH |
2399 | }; |
2400 | ||
ec1b4cf7 | 2401 | static const struct net_proto_family iucv_sock_family_ops = { |
eac3731b JH |
2402 | .family = AF_IUCV, |
2403 | .owner = THIS_MODULE, | |
2404 | .create = iucv_sock_create, | |
2405 | }; | |
2406 | ||
3881ac44 UB |
2407 | static struct packet_type iucv_packet_type = { |
2408 | .type = cpu_to_be16(ETH_P_AF_IUCV), | |
2409 | .func = afiucv_hs_rcv, | |
2410 | }; | |
2411 | ||
2412 | static int afiucv_iucv_init(void) | |
6fcd61f7 FB |
2413 | { |
2414 | int err; | |
2415 | ||
2416 | err = pr_iucv->iucv_register(&af_iucv_handler, 0); | |
2417 | if (err) | |
2418 | goto out; | |
2419 | /* establish dummy device */ | |
2420 | af_iucv_driver.bus = pr_iucv->bus; | |
2421 | err = driver_register(&af_iucv_driver); | |
2422 | if (err) | |
2423 | goto out_iucv; | |
2424 | af_iucv_dev = kzalloc(sizeof(struct device), GFP_KERNEL); | |
2425 | if (!af_iucv_dev) { | |
2426 | err = -ENOMEM; | |
2427 | goto out_driver; | |
2428 | } | |
2429 | dev_set_name(af_iucv_dev, "af_iucv"); | |
2430 | af_iucv_dev->bus = pr_iucv->bus; | |
2431 | af_iucv_dev->parent = pr_iucv->root; | |
2432 | af_iucv_dev->release = (void (*)(struct device *))kfree; | |
2433 | af_iucv_dev->driver = &af_iucv_driver; | |
2434 | err = device_register(af_iucv_dev); | |
2435 | if (err) | |
2436 | goto out_driver; | |
2437 | return 0; | |
2438 | ||
2439 | out_driver: | |
2440 | driver_unregister(&af_iucv_driver); | |
2441 | out_iucv: | |
2442 | pr_iucv->iucv_unregister(&af_iucv_handler, 0); | |
2443 | out: | |
2444 | return err; | |
2445 | } | |
2446 | ||
da99f056 | 2447 | static int __init afiucv_init(void) |
eac3731b JH |
2448 | { |
2449 | int err; | |
2450 | ||
3881ac44 UB |
2451 | if (MACHINE_IS_VM) { |
2452 | cpcmd("QUERY USERID", iucv_userid, sizeof(iucv_userid), &err); | |
2453 | if (unlikely(err)) { | |
2454 | WARN_ON(err); | |
2455 | err = -EPROTONOSUPPORT; | |
2456 | goto out; | |
2457 | } | |
eac3731b | 2458 | |
3881ac44 UB |
2459 | pr_iucv = try_then_request_module(symbol_get(iucv_if), "iucv"); |
2460 | if (!pr_iucv) { | |
2461 | printk(KERN_WARNING "iucv_if lookup failed\n"); | |
2462 | memset(&iucv_userid, 0, sizeof(iucv_userid)); | |
2463 | } | |
2464 | } else { | |
2465 | memset(&iucv_userid, 0, sizeof(iucv_userid)); | |
2466 | pr_iucv = NULL; | |
6fcd61f7 FB |
2467 | } |
2468 | ||
eac3731b JH |
2469 | err = proto_register(&iucv_proto, 0); |
2470 | if (err) | |
6fcd61f7 | 2471 | goto out; |
eac3731b JH |
2472 | err = sock_register(&iucv_sock_family_ops); |
2473 | if (err) | |
2474 | goto out_proto; | |
6fcd61f7 | 2475 | |
3881ac44 UB |
2476 | if (pr_iucv) { |
2477 | err = afiucv_iucv_init(); | |
2478 | if (err) | |
2479 | goto out_sock; | |
9fbd87d4 UB |
2480 | } else |
2481 | register_netdevice_notifier(&afiucv_netdev_notifier); | |
3881ac44 | 2482 | dev_add_pack(&iucv_packet_type); |
eac3731b JH |
2483 | return 0; |
2484 | ||
c23cad92 UB |
2485 | out_sock: |
2486 | sock_unregister(PF_IUCV); | |
eac3731b JH |
2487 | out_proto: |
2488 | proto_unregister(&iucv_proto); | |
eac3731b | 2489 | out: |
6fcd61f7 FB |
2490 | if (pr_iucv) |
2491 | symbol_put(iucv_if); | |
eac3731b JH |
2492 | return err; |
2493 | } | |
2494 | ||
2495 | static void __exit afiucv_exit(void) | |
2496 | { | |
3881ac44 UB |
2497 | if (pr_iucv) { |
2498 | device_unregister(af_iucv_dev); | |
2499 | driver_unregister(&af_iucv_driver); | |
2500 | pr_iucv->iucv_unregister(&af_iucv_handler, 0); | |
2501 | symbol_put(iucv_if); | |
9fbd87d4 UB |
2502 | } else |
2503 | unregister_netdevice_notifier(&afiucv_netdev_notifier); | |
3881ac44 | 2504 | dev_remove_pack(&iucv_packet_type); |
eac3731b JH |
2505 | sock_unregister(PF_IUCV); |
2506 | proto_unregister(&iucv_proto); | |
eac3731b JH |
2507 | } |
2508 | ||
2509 | module_init(afiucv_init); | |
2510 | module_exit(afiucv_exit); | |
2511 | ||
2512 | MODULE_AUTHOR("Jennifer Hunt <jenhunt@us.ibm.com>"); | |
2513 | MODULE_DESCRIPTION("IUCV Sockets ver " VERSION); | |
2514 | MODULE_VERSION(VERSION); | |
2515 | MODULE_LICENSE("GPL"); | |
2516 | MODULE_ALIAS_NETPROTO(PF_IUCV); | |
3881ac44 | 2517 |