Commit | Line | Data |
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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
eac3731b | 2 | /* |
eac3731b JH |
3 | * IUCV protocol stack for Linux on zSeries |
4 | * | |
c23cad92 | 5 | * Copyright IBM Corp. 2006, 2009 |
eac3731b JH |
6 | * |
7 | * Author(s): Jennifer Hunt <jenhunt@us.ibm.com> | |
c23cad92 UB |
8 | * Hendrik Brueckner <brueckner@linux.vnet.ibm.com> |
9 | * PM functions: | |
10 | * Ursula Braun <ursula.braun@de.ibm.com> | |
eac3731b JH |
11 | */ |
12 | ||
8f7c502c UB |
13 | #define KMSG_COMPONENT "af_iucv" |
14 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
15 | ||
eac3731b | 16 | #include <linux/module.h> |
238965b7 | 17 | #include <linux/netdevice.h> |
eac3731b JH |
18 | #include <linux/types.h> |
19 | #include <linux/list.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/kernel.h> | |
174cd4b1 | 22 | #include <linux/sched/signal.h> |
eac3731b JH |
23 | #include <linux/slab.h> |
24 | #include <linux/skbuff.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/poll.h> | |
02f06918 | 27 | #include <linux/security.h> |
eac3731b JH |
28 | #include <net/sock.h> |
29 | #include <asm/ebcdic.h> | |
30 | #include <asm/cpcmd.h> | |
31 | #include <linux/kmod.h> | |
32 | ||
eac3731b JH |
33 | #include <net/iucv/af_iucv.h> |
34 | ||
3881ac44 | 35 | #define VERSION "1.2" |
eac3731b JH |
36 | |
37 | static char iucv_userid[80]; | |
38 | ||
5708e868 | 39 | static const struct proto_ops iucv_sock_ops; |
eac3731b JH |
40 | |
41 | static struct proto iucv_proto = { | |
42 | .name = "AF_IUCV", | |
43 | .owner = THIS_MODULE, | |
44 | .obj_size = sizeof(struct iucv_sock), | |
45 | }; | |
46 | ||
6fcd61f7 FB |
47 | static struct iucv_interface *pr_iucv; |
48 | ||
b8942e3b HB |
49 | /* special AF_IUCV IPRM messages */ |
50 | static const u8 iprm_shutdown[8] = | |
51 | {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}; | |
52 | ||
86c85e1f | 53 | #define TRGCLS_SIZE FIELD_SIZEOF(struct iucv_message, class) |
44b1e6b5 | 54 | |
0ea920d2 HB |
55 | #define __iucv_sock_wait(sk, condition, timeo, ret) \ |
56 | do { \ | |
57 | DEFINE_WAIT(__wait); \ | |
58 | long __timeo = timeo; \ | |
59 | ret = 0; \ | |
aa395145 | 60 | prepare_to_wait(sk_sleep(sk), &__wait, TASK_INTERRUPTIBLE); \ |
0ea920d2 | 61 | while (!(condition)) { \ |
0ea920d2 HB |
62 | if (!__timeo) { \ |
63 | ret = -EAGAIN; \ | |
64 | break; \ | |
65 | } \ | |
66 | if (signal_pending(current)) { \ | |
67 | ret = sock_intr_errno(__timeo); \ | |
68 | break; \ | |
69 | } \ | |
70 | release_sock(sk); \ | |
71 | __timeo = schedule_timeout(__timeo); \ | |
72 | lock_sock(sk); \ | |
73 | ret = sock_error(sk); \ | |
74 | if (ret) \ | |
75 | break; \ | |
76 | } \ | |
aa395145 | 77 | finish_wait(sk_sleep(sk), &__wait); \ |
0ea920d2 HB |
78 | } while (0) |
79 | ||
80 | #define iucv_sock_wait(sk, condition, timeo) \ | |
81 | ({ \ | |
82 | int __ret = 0; \ | |
83 | if (!(condition)) \ | |
84 | __iucv_sock_wait(sk, condition, timeo, __ret); \ | |
85 | __ret; \ | |
86 | }) | |
44b1e6b5 | 87 | |
57f20448 HC |
88 | static void iucv_sock_kill(struct sock *sk); |
89 | static void iucv_sock_close(struct sock *sk); | |
7d316b94 | 90 | static void iucv_sever_path(struct sock *, int); |
57f20448 | 91 | |
3881ac44 UB |
92 | static int afiucv_hs_rcv(struct sk_buff *skb, struct net_device *dev, |
93 | struct packet_type *pt, struct net_device *orig_dev); | |
94 | static int afiucv_hs_send(struct iucv_message *imsg, struct sock *sock, | |
95 | struct sk_buff *skb, u8 flags); | |
96 | static void afiucv_hs_callback_txnotify(struct sk_buff *, enum iucv_tx_notify); | |
97 | ||
eac3731b JH |
98 | /* Call Back functions */ |
99 | static void iucv_callback_rx(struct iucv_path *, struct iucv_message *); | |
100 | static void iucv_callback_txdone(struct iucv_path *, struct iucv_message *); | |
91e60eb6 UB |
101 | static void iucv_callback_connack(struct iucv_path *, u8 *); |
102 | static int iucv_callback_connreq(struct iucv_path *, u8 *, u8 *); | |
103 | static void iucv_callback_connrej(struct iucv_path *, u8 *); | |
104 | static void iucv_callback_shutdown(struct iucv_path *, u8 *); | |
eac3731b JH |
105 | |
106 | static struct iucv_sock_list iucv_sk_list = { | |
3db8ce35 | 107 | .lock = __RW_LOCK_UNLOCKED(iucv_sk_list.lock), |
eac3731b JH |
108 | .autobind_name = ATOMIC_INIT(0) |
109 | }; | |
110 | ||
111 | static struct iucv_handler af_iucv_handler = { | |
112 | .path_pending = iucv_callback_connreq, | |
113 | .path_complete = iucv_callback_connack, | |
114 | .path_severed = iucv_callback_connrej, | |
115 | .message_pending = iucv_callback_rx, | |
af88b52d HB |
116 | .message_complete = iucv_callback_txdone, |
117 | .path_quiesced = iucv_callback_shutdown, | |
eac3731b JH |
118 | }; |
119 | ||
120 | static inline void high_nmcpy(unsigned char *dst, char *src) | |
121 | { | |
122 | memcpy(dst, src, 8); | |
123 | } | |
124 | ||
125 | static inline void low_nmcpy(unsigned char *dst, char *src) | |
126 | { | |
127 | memcpy(&dst[8], src, 8); | |
128 | } | |
129 | ||
c23cad92 UB |
130 | static int afiucv_pm_prepare(struct device *dev) |
131 | { | |
132 | #ifdef CONFIG_PM_DEBUG | |
133 | printk(KERN_WARNING "afiucv_pm_prepare\n"); | |
134 | #endif | |
135 | return 0; | |
136 | } | |
137 | ||
138 | static void afiucv_pm_complete(struct device *dev) | |
139 | { | |
140 | #ifdef CONFIG_PM_DEBUG | |
141 | printk(KERN_WARNING "afiucv_pm_complete\n"); | |
142 | #endif | |
c23cad92 UB |
143 | } |
144 | ||
145 | /** | |
146 | * afiucv_pm_freeze() - Freeze PM callback | |
147 | * @dev: AFIUCV dummy device | |
148 | * | |
149 | * Sever all established IUCV communication pathes | |
150 | */ | |
151 | static int afiucv_pm_freeze(struct device *dev) | |
152 | { | |
153 | struct iucv_sock *iucv; | |
154 | struct sock *sk; | |
c23cad92 UB |
155 | |
156 | #ifdef CONFIG_PM_DEBUG | |
157 | printk(KERN_WARNING "afiucv_pm_freeze\n"); | |
158 | #endif | |
159 | read_lock(&iucv_sk_list.lock); | |
b67bfe0d | 160 | sk_for_each(sk, &iucv_sk_list.head) { |
c23cad92 | 161 | iucv = iucv_sk(sk); |
c23cad92 | 162 | switch (sk->sk_state) { |
c23cad92 UB |
163 | case IUCV_DISCONN: |
164 | case IUCV_CLOSING: | |
165 | case IUCV_CONNECTED: | |
7d316b94 | 166 | iucv_sever_path(sk, 0); |
c23cad92 UB |
167 | break; |
168 | case IUCV_OPEN: | |
169 | case IUCV_BOUND: | |
170 | case IUCV_LISTEN: | |
171 | case IUCV_CLOSED: | |
172 | default: | |
173 | break; | |
174 | } | |
7d316b94 UB |
175 | skb_queue_purge(&iucv->send_skb_q); |
176 | skb_queue_purge(&iucv->backlog_skb_q); | |
c23cad92 UB |
177 | } |
178 | read_unlock(&iucv_sk_list.lock); | |
fb3b467e | 179 | return 0; |
c23cad92 UB |
180 | } |
181 | ||
182 | /** | |
183 | * afiucv_pm_restore_thaw() - Thaw and restore PM callback | |
184 | * @dev: AFIUCV dummy device | |
185 | * | |
186 | * socket clean up after freeze | |
187 | */ | |
188 | static int afiucv_pm_restore_thaw(struct device *dev) | |
189 | { | |
c23cad92 | 190 | struct sock *sk; |
c23cad92 UB |
191 | |
192 | #ifdef CONFIG_PM_DEBUG | |
193 | printk(KERN_WARNING "afiucv_pm_restore_thaw\n"); | |
194 | #endif | |
195 | read_lock(&iucv_sk_list.lock); | |
b67bfe0d | 196 | sk_for_each(sk, &iucv_sk_list.head) { |
c23cad92 UB |
197 | switch (sk->sk_state) { |
198 | case IUCV_CONNECTED: | |
199 | sk->sk_err = EPIPE; | |
200 | sk->sk_state = IUCV_DISCONN; | |
201 | sk->sk_state_change(sk); | |
202 | break; | |
203 | case IUCV_DISCONN: | |
c23cad92 UB |
204 | case IUCV_CLOSING: |
205 | case IUCV_LISTEN: | |
206 | case IUCV_BOUND: | |
207 | case IUCV_OPEN: | |
208 | default: | |
209 | break; | |
210 | } | |
211 | } | |
212 | read_unlock(&iucv_sk_list.lock); | |
213 | return 0; | |
214 | } | |
215 | ||
47145210 | 216 | static const struct dev_pm_ops afiucv_pm_ops = { |
c23cad92 UB |
217 | .prepare = afiucv_pm_prepare, |
218 | .complete = afiucv_pm_complete, | |
219 | .freeze = afiucv_pm_freeze, | |
220 | .thaw = afiucv_pm_restore_thaw, | |
221 | .restore = afiucv_pm_restore_thaw, | |
222 | }; | |
223 | ||
224 | static struct device_driver af_iucv_driver = { | |
225 | .owner = THIS_MODULE, | |
226 | .name = "afiucv", | |
6fcd61f7 | 227 | .bus = NULL, |
c23cad92 UB |
228 | .pm = &afiucv_pm_ops, |
229 | }; | |
230 | ||
231 | /* dummy device used as trigger for PM functions */ | |
232 | static struct device *af_iucv_dev; | |
233 | ||
b8942e3b HB |
234 | /** |
235 | * iucv_msg_length() - Returns the length of an iucv message. | |
236 | * @msg: Pointer to struct iucv_message, MUST NOT be NULL | |
237 | * | |
238 | * The function returns the length of the specified iucv message @msg of data | |
239 | * stored in a buffer and of data stored in the parameter list (PRMDATA). | |
240 | * | |
241 | * For IUCV_IPRMDATA, AF_IUCV uses the following convention to transport socket | |
242 | * data: | |
243 | * PRMDATA[0..6] socket data (max 7 bytes); | |
244 | * PRMDATA[7] socket data length value (len is 0xff - PRMDATA[7]) | |
245 | * | |
25985edc | 246 | * The socket data length is computed by subtracting the socket data length |
b8942e3b HB |
247 | * value from 0xFF. |
248 | * If the socket data len is greater 7, then PRMDATA can be used for special | |
249 | * notifications (see iucv_sock_shutdown); and further, | |
250 | * if the socket data len is > 7, the function returns 8. | |
251 | * | |
252 | * Use this function to allocate socket buffers to store iucv message data. | |
253 | */ | |
254 | static inline size_t iucv_msg_length(struct iucv_message *msg) | |
255 | { | |
256 | size_t datalen; | |
257 | ||
258 | if (msg->flags & IUCV_IPRMDATA) { | |
259 | datalen = 0xff - msg->rmmsg[7]; | |
260 | return (datalen < 8) ? datalen : 8; | |
261 | } | |
262 | return msg->length; | |
263 | } | |
264 | ||
0ea920d2 HB |
265 | /** |
266 | * iucv_sock_in_state() - check for specific states | |
267 | * @sk: sock structure | |
268 | * @state: first iucv sk state | |
269 | * @state: second iucv sk state | |
270 | * | |
271 | * Returns true if the socket in either in the first or second state. | |
272 | */ | |
273 | static int iucv_sock_in_state(struct sock *sk, int state, int state2) | |
274 | { | |
275 | return (sk->sk_state == state || sk->sk_state == state2); | |
276 | } | |
277 | ||
278 | /** | |
279 | * iucv_below_msglim() - function to check if messages can be sent | |
280 | * @sk: sock structure | |
281 | * | |
282 | * Returns true if the send queue length is lower than the message limit. | |
283 | * Always returns true if the socket is not connected (no iucv path for | |
284 | * checking the message limit). | |
285 | */ | |
286 | static inline int iucv_below_msglim(struct sock *sk) | |
287 | { | |
288 | struct iucv_sock *iucv = iucv_sk(sk); | |
289 | ||
290 | if (sk->sk_state != IUCV_CONNECTED) | |
291 | return 1; | |
3881ac44 UB |
292 | if (iucv->transport == AF_IUCV_TRANS_IUCV) |
293 | return (skb_queue_len(&iucv->send_skb_q) < iucv->path->msglim); | |
294 | else | |
295 | return ((atomic_read(&iucv->msg_sent) < iucv->msglimit_peer) && | |
296 | (atomic_read(&iucv->pendings) <= 0)); | |
0ea920d2 HB |
297 | } |
298 | ||
299 | /** | |
300 | * iucv_sock_wake_msglim() - Wake up thread waiting on msg limit | |
301 | */ | |
302 | static void iucv_sock_wake_msglim(struct sock *sk) | |
303 | { | |
43815482 ED |
304 | struct socket_wq *wq; |
305 | ||
306 | rcu_read_lock(); | |
307 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 308 | if (skwq_has_sleeper(wq)) |
43815482 | 309 | wake_up_interruptible_all(&wq->wait); |
0ea920d2 | 310 | sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT); |
43815482 | 311 | rcu_read_unlock(); |
0ea920d2 HB |
312 | } |
313 | ||
3881ac44 UB |
314 | /** |
315 | * afiucv_hs_send() - send a message through HiperSockets transport | |
316 | */ | |
317 | static int afiucv_hs_send(struct iucv_message *imsg, struct sock *sock, | |
318 | struct sk_buff *skb, u8 flags) | |
319 | { | |
3881ac44 UB |
320 | struct iucv_sock *iucv = iucv_sk(sock); |
321 | struct af_iucv_trans_hdr *phs_hdr; | |
322 | struct sk_buff *nskb; | |
323 | int err, confirm_recv = 0; | |
324 | ||
cd11d112 JW |
325 | phs_hdr = skb_push(skb, sizeof(*phs_hdr)); |
326 | memset(phs_hdr, 0, sizeof(*phs_hdr)); | |
3881ac44 | 327 | skb_reset_network_header(skb); |
3881ac44 UB |
328 | |
329 | phs_hdr->magic = ETH_P_AF_IUCV; | |
330 | phs_hdr->version = 1; | |
331 | phs_hdr->flags = flags; | |
332 | if (flags == AF_IUCV_FLAG_SYN) | |
333 | phs_hdr->window = iucv->msglimit; | |
334 | else if ((flags == AF_IUCV_FLAG_WIN) || !flags) { | |
335 | confirm_recv = atomic_read(&iucv->msg_recv); | |
336 | phs_hdr->window = confirm_recv; | |
337 | if (confirm_recv) | |
338 | phs_hdr->flags = phs_hdr->flags | AF_IUCV_FLAG_WIN; | |
339 | } | |
340 | memcpy(phs_hdr->destUserID, iucv->dst_user_id, 8); | |
341 | memcpy(phs_hdr->destAppName, iucv->dst_name, 8); | |
342 | memcpy(phs_hdr->srcUserID, iucv->src_user_id, 8); | |
343 | memcpy(phs_hdr->srcAppName, iucv->src_name, 8); | |
344 | ASCEBC(phs_hdr->destUserID, sizeof(phs_hdr->destUserID)); | |
345 | ASCEBC(phs_hdr->destAppName, sizeof(phs_hdr->destAppName)); | |
346 | ASCEBC(phs_hdr->srcUserID, sizeof(phs_hdr->srcUserID)); | |
347 | ASCEBC(phs_hdr->srcAppName, sizeof(phs_hdr->srcAppName)); | |
348 | if (imsg) | |
349 | memcpy(&phs_hdr->iucv_hdr, imsg, sizeof(struct iucv_message)); | |
350 | ||
800c5eb7 | 351 | skb->dev = iucv->hs_dev; |
b2f54394 JW |
352 | if (!skb->dev) { |
353 | err = -ENODEV; | |
354 | goto err_free; | |
355 | } | |
238965b7 JW |
356 | |
357 | dev_hard_header(skb, skb->dev, ETH_P_AF_IUCV, NULL, NULL, skb->len); | |
358 | ||
b2f54394 JW |
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) { |
b2f54394 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); |
238965b7 JW |
371 | |
372 | __skb_header_release(skb); | |
3881ac44 | 373 | nskb = skb_clone(skb, GFP_ATOMIC); |
b2f54394 JW |
374 | if (!nskb) { |
375 | err = -ENOMEM; | |
376 | goto err_free; | |
377 | } | |
378 | ||
3881ac44 UB |
379 | skb_queue_tail(&iucv->send_skb_q, nskb); |
380 | err = dev_queue_xmit(skb); | |
800c5eb7 | 381 | if (net_xmit_eval(err)) { |
3881ac44 UB |
382 | skb_unlink(nskb, &iucv->send_skb_q); |
383 | kfree_skb(nskb); | |
384 | } else { | |
385 | atomic_sub(confirm_recv, &iucv->msg_recv); | |
386 | WARN_ON(atomic_read(&iucv->msg_recv) < 0); | |
387 | } | |
800c5eb7 | 388 | return net_xmit_eval(err); |
b2f54394 JW |
389 | |
390 | err_free: | |
391 | kfree_skb(skb); | |
392 | return err; | |
3881ac44 UB |
393 | } |
394 | ||
eac3731b JH |
395 | static struct sock *__iucv_get_sock_by_name(char *nm) |
396 | { | |
397 | struct sock *sk; | |
eac3731b | 398 | |
b67bfe0d | 399 | sk_for_each(sk, &iucv_sk_list.head) |
eac3731b JH |
400 | if (!memcmp(&iucv_sk(sk)->src_name, nm, 8)) |
401 | return sk; | |
402 | ||
403 | return NULL; | |
404 | } | |
405 | ||
406 | static void iucv_sock_destruct(struct sock *sk) | |
407 | { | |
408 | skb_queue_purge(&sk->sk_receive_queue); | |
82492a35 UB |
409 | skb_queue_purge(&sk->sk_error_queue); |
410 | ||
411 | sk_mem_reclaim(sk); | |
412 | ||
413 | if (!sock_flag(sk, SOCK_DEAD)) { | |
414 | pr_err("Attempt to release alive iucv socket %p\n", sk); | |
415 | return; | |
416 | } | |
417 | ||
418 | WARN_ON(atomic_read(&sk->sk_rmem_alloc)); | |
b2c9c5df | 419 | WARN_ON(refcount_read(&sk->sk_wmem_alloc)); |
82492a35 UB |
420 | WARN_ON(sk->sk_wmem_queued); |
421 | WARN_ON(sk->sk_forward_alloc); | |
eac3731b JH |
422 | } |
423 | ||
424 | /* Cleanup Listen */ | |
425 | static void iucv_sock_cleanup_listen(struct sock *parent) | |
426 | { | |
427 | struct sock *sk; | |
428 | ||
429 | /* Close non-accepted connections */ | |
430 | while ((sk = iucv_accept_dequeue(parent, NULL))) { | |
431 | iucv_sock_close(sk); | |
432 | iucv_sock_kill(sk); | |
433 | } | |
434 | ||
435 | parent->sk_state = IUCV_CLOSED; | |
eac3731b JH |
436 | } |
437 | ||
7514bab0 | 438 | /* Kill socket (only if zapped and orphaned) */ |
eac3731b JH |
439 | static void iucv_sock_kill(struct sock *sk) |
440 | { | |
441 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
442 | return; | |
443 | ||
444 | iucv_sock_unlink(&iucv_sk_list, sk); | |
445 | sock_set_flag(sk, SOCK_DEAD); | |
446 | sock_put(sk); | |
447 | } | |
448 | ||
7d316b94 UB |
449 | /* Terminate an IUCV path */ |
450 | static void iucv_sever_path(struct sock *sk, int with_user_data) | |
451 | { | |
452 | unsigned char user_data[16]; | |
453 | struct iucv_sock *iucv = iucv_sk(sk); | |
454 | struct iucv_path *path = iucv->path; | |
455 | ||
456 | if (iucv->path) { | |
457 | iucv->path = NULL; | |
458 | if (with_user_data) { | |
459 | low_nmcpy(user_data, iucv->src_name); | |
460 | high_nmcpy(user_data, iucv->dst_name); | |
461 | ASCEBC(user_data, sizeof(user_data)); | |
462 | pr_iucv->path_sever(path, user_data); | |
463 | } else | |
464 | pr_iucv->path_sever(path, NULL); | |
465 | iucv_path_free(path); | |
466 | } | |
467 | } | |
468 | ||
4e0ad322 | 469 | /* Send controlling flags through an IUCV socket for HIPER transport */ |
9fbd87d4 UB |
470 | static int iucv_send_ctrl(struct sock *sk, u8 flags) |
471 | { | |
238965b7 | 472 | struct iucv_sock *iucv = iucv_sk(sk); |
9fbd87d4 UB |
473 | int err = 0; |
474 | int blen; | |
475 | struct sk_buff *skb; | |
4e0ad322 | 476 | u8 shutdown = 0; |
9fbd87d4 | 477 | |
238965b7 JW |
478 | blen = sizeof(struct af_iucv_trans_hdr) + |
479 | LL_RESERVED_SPACE(iucv->hs_dev); | |
4e0ad322 UB |
480 | if (sk->sk_shutdown & SEND_SHUTDOWN) { |
481 | /* controlling flags should be sent anyway */ | |
482 | shutdown = sk->sk_shutdown; | |
483 | sk->sk_shutdown &= RCV_SHUTDOWN; | |
484 | } | |
9fbd87d4 UB |
485 | skb = sock_alloc_send_skb(sk, blen, 1, &err); |
486 | if (skb) { | |
487 | skb_reserve(skb, blen); | |
488 | err = afiucv_hs_send(NULL, sk, skb, flags); | |
489 | } | |
4e0ad322 UB |
490 | if (shutdown) |
491 | sk->sk_shutdown = shutdown; | |
9fbd87d4 UB |
492 | return err; |
493 | } | |
494 | ||
eac3731b JH |
495 | /* Close an IUCV socket */ |
496 | static void iucv_sock_close(struct sock *sk) | |
497 | { | |
eac3731b | 498 | struct iucv_sock *iucv = iucv_sk(sk); |
561e0360 | 499 | unsigned long timeo; |
800c5eb7 | 500 | int err = 0; |
eac3731b | 501 | |
eac3731b JH |
502 | lock_sock(sk); |
503 | ||
da99f056 | 504 | switch (sk->sk_state) { |
eac3731b JH |
505 | case IUCV_LISTEN: |
506 | iucv_sock_cleanup_listen(sk); | |
507 | break; | |
508 | ||
509 | case IUCV_CONNECTED: | |
3881ac44 | 510 | if (iucv->transport == AF_IUCV_TRANS_HIPER) { |
9fbd87d4 | 511 | err = iucv_send_ctrl(sk, AF_IUCV_FLAG_FIN); |
3881ac44 UB |
512 | sk->sk_state = IUCV_DISCONN; |
513 | sk->sk_state_change(sk); | |
514 | } | |
816abbad | 515 | case IUCV_DISCONN: /* fall through */ |
561e0360 JH |
516 | sk->sk_state = IUCV_CLOSING; |
517 | sk->sk_state_change(sk); | |
518 | ||
800c5eb7 | 519 | if (!err && !skb_queue_empty(&iucv->send_skb_q)) { |
561e0360 JH |
520 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) |
521 | timeo = sk->sk_lingertime; | |
522 | else | |
523 | timeo = IUCV_DISCONN_TIMEOUT; | |
9f6298a6 | 524 | iucv_sock_wait(sk, |
0ea920d2 HB |
525 | iucv_sock_in_state(sk, IUCV_CLOSED, 0), |
526 | timeo); | |
561e0360 JH |
527 | } |
528 | ||
bbe188c8 | 529 | case IUCV_CLOSING: /* fall through */ |
561e0360 JH |
530 | sk->sk_state = IUCV_CLOSED; |
531 | sk->sk_state_change(sk); | |
532 | ||
eac3731b JH |
533 | sk->sk_err = ECONNRESET; |
534 | sk->sk_state_change(sk); | |
535 | ||
800c5eb7 | 536 | skb_queue_purge(&iucv->send_skb_q); |
561e0360 | 537 | skb_queue_purge(&iucv->backlog_skb_q); |
eac3731b | 538 | |
7d316b94 UB |
539 | default: /* fall through */ |
540 | iucv_sever_path(sk, 1); | |
3ff50b79 | 541 | } |
eac3731b | 542 | |
800c5eb7 UB |
543 | if (iucv->hs_dev) { |
544 | dev_put(iucv->hs_dev); | |
545 | iucv->hs_dev = NULL; | |
546 | sk->sk_bound_dev_if = 0; | |
547 | } | |
548 | ||
7514bab0 HB |
549 | /* mark socket for deletion by iucv_sock_kill() */ |
550 | sock_set_flag(sk, SOCK_ZAPPED); | |
551 | ||
eac3731b | 552 | release_sock(sk); |
eac3731b JH |
553 | } |
554 | ||
555 | static void iucv_sock_init(struct sock *sk, struct sock *parent) | |
556 | { | |
02f06918 | 557 | if (parent) { |
eac3731b | 558 | sk->sk_type = parent->sk_type; |
02f06918 PM |
559 | security_sk_clone(parent, sk); |
560 | } | |
eac3731b JH |
561 | } |
562 | ||
11aa9c28 | 563 | static struct sock *iucv_sock_alloc(struct socket *sock, int proto, gfp_t prio, int kern) |
eac3731b JH |
564 | { |
565 | struct sock *sk; | |
493d3971 | 566 | struct iucv_sock *iucv; |
eac3731b | 567 | |
11aa9c28 | 568 | sk = sk_alloc(&init_net, PF_IUCV, prio, &iucv_proto, kern); |
eac3731b JH |
569 | if (!sk) |
570 | return NULL; | |
493d3971 | 571 | iucv = iucv_sk(sk); |
eac3731b JH |
572 | |
573 | sock_init_data(sock, sk); | |
493d3971 UB |
574 | INIT_LIST_HEAD(&iucv->accept_q); |
575 | spin_lock_init(&iucv->accept_q_lock); | |
576 | skb_queue_head_init(&iucv->send_skb_q); | |
577 | INIT_LIST_HEAD(&iucv->message_q.list); | |
578 | spin_lock_init(&iucv->message_q.lock); | |
579 | skb_queue_head_init(&iucv->backlog_skb_q); | |
580 | iucv->send_tag = 0; | |
3881ac44 | 581 | atomic_set(&iucv->pendings, 0); |
493d3971 | 582 | iucv->flags = 0; |
3881ac44 UB |
583 | iucv->msglimit = 0; |
584 | atomic_set(&iucv->msg_sent, 0); | |
585 | atomic_set(&iucv->msg_recv, 0); | |
493d3971 | 586 | iucv->path = NULL; |
3881ac44 | 587 | iucv->sk_txnotify = afiucv_hs_callback_txnotify; |
493d3971 | 588 | memset(&iucv->src_user_id , 0, 32); |
3881ac44 UB |
589 | if (pr_iucv) |
590 | iucv->transport = AF_IUCV_TRANS_IUCV; | |
591 | else | |
592 | iucv->transport = AF_IUCV_TRANS_HIPER; | |
eac3731b JH |
593 | |
594 | sk->sk_destruct = iucv_sock_destruct; | |
595 | sk->sk_sndtimeo = IUCV_CONN_TIMEOUT; | |
eac3731b JH |
596 | |
597 | sock_reset_flag(sk, SOCK_ZAPPED); | |
598 | ||
599 | sk->sk_protocol = proto; | |
600 | sk->sk_state = IUCV_OPEN; | |
601 | ||
eac3731b JH |
602 | iucv_sock_link(&iucv_sk_list, sk); |
603 | return sk; | |
604 | } | |
605 | ||
606 | /* Create an IUCV socket */ | |
3f378b68 EP |
607 | static int iucv_sock_create(struct net *net, struct socket *sock, int protocol, |
608 | int kern) | |
eac3731b JH |
609 | { |
610 | struct sock *sk; | |
611 | ||
aa8e71f5 HB |
612 | if (protocol && protocol != PF_IUCV) |
613 | return -EPROTONOSUPPORT; | |
eac3731b JH |
614 | |
615 | sock->state = SS_UNCONNECTED; | |
aa8e71f5 HB |
616 | |
617 | switch (sock->type) { | |
618 | case SOCK_STREAM: | |
619 | sock->ops = &iucv_sock_ops; | |
620 | break; | |
621 | case SOCK_SEQPACKET: | |
622 | /* currently, proto ops can handle both sk types */ | |
623 | sock->ops = &iucv_sock_ops; | |
624 | break; | |
625 | default: | |
626 | return -ESOCKTNOSUPPORT; | |
627 | } | |
eac3731b | 628 | |
11aa9c28 | 629 | sk = iucv_sock_alloc(sock, protocol, GFP_KERNEL, kern); |
eac3731b JH |
630 | if (!sk) |
631 | return -ENOMEM; | |
632 | ||
633 | iucv_sock_init(sk, NULL); | |
634 | ||
635 | return 0; | |
636 | } | |
637 | ||
638 | void iucv_sock_link(struct iucv_sock_list *l, struct sock *sk) | |
639 | { | |
640 | write_lock_bh(&l->lock); | |
641 | sk_add_node(sk, &l->head); | |
642 | write_unlock_bh(&l->lock); | |
643 | } | |
644 | ||
645 | void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *sk) | |
646 | { | |
647 | write_lock_bh(&l->lock); | |
648 | sk_del_node_init(sk); | |
649 | write_unlock_bh(&l->lock); | |
650 | } | |
651 | ||
652 | void iucv_accept_enqueue(struct sock *parent, struct sock *sk) | |
653 | { | |
febca281 UB |
654 | unsigned long flags; |
655 | struct iucv_sock *par = iucv_sk(parent); | |
656 | ||
eac3731b | 657 | sock_hold(sk); |
febca281 UB |
658 | spin_lock_irqsave(&par->accept_q_lock, flags); |
659 | list_add_tail(&iucv_sk(sk)->accept_q, &par->accept_q); | |
660 | spin_unlock_irqrestore(&par->accept_q_lock, flags); | |
eac3731b | 661 | iucv_sk(sk)->parent = parent; |
49f5eba7 | 662 | sk_acceptq_added(parent); |
eac3731b JH |
663 | } |
664 | ||
665 | void iucv_accept_unlink(struct sock *sk) | |
666 | { | |
febca281 UB |
667 | unsigned long flags; |
668 | struct iucv_sock *par = iucv_sk(iucv_sk(sk)->parent); | |
669 | ||
670 | spin_lock_irqsave(&par->accept_q_lock, flags); | |
eac3731b | 671 | list_del_init(&iucv_sk(sk)->accept_q); |
febca281 | 672 | spin_unlock_irqrestore(&par->accept_q_lock, flags); |
49f5eba7 | 673 | sk_acceptq_removed(iucv_sk(sk)->parent); |
eac3731b JH |
674 | iucv_sk(sk)->parent = NULL; |
675 | sock_put(sk); | |
676 | } | |
677 | ||
678 | struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock) | |
679 | { | |
680 | struct iucv_sock *isk, *n; | |
681 | struct sock *sk; | |
682 | ||
da99f056 | 683 | list_for_each_entry_safe(isk, n, &iucv_sk(parent)->accept_q, accept_q) { |
eac3731b JH |
684 | sk = (struct sock *) isk; |
685 | lock_sock(sk); | |
686 | ||
687 | if (sk->sk_state == IUCV_CLOSED) { | |
eac3731b | 688 | iucv_accept_unlink(sk); |
febca281 | 689 | release_sock(sk); |
eac3731b JH |
690 | continue; |
691 | } | |
692 | ||
693 | if (sk->sk_state == IUCV_CONNECTED || | |
aac6399c | 694 | sk->sk_state == IUCV_DISCONN || |
eac3731b JH |
695 | !newsock) { |
696 | iucv_accept_unlink(sk); | |
697 | if (newsock) | |
698 | sock_graft(sk, newsock); | |
699 | ||
eac3731b JH |
700 | release_sock(sk); |
701 | return sk; | |
702 | } | |
703 | ||
704 | release_sock(sk); | |
705 | } | |
706 | return NULL; | |
707 | } | |
708 | ||
53a4b499 PH |
709 | static void __iucv_auto_name(struct iucv_sock *iucv) |
710 | { | |
711 | char name[12]; | |
712 | ||
713 | sprintf(name, "%08x", atomic_inc_return(&iucv_sk_list.autobind_name)); | |
714 | while (__iucv_get_sock_by_name(name)) { | |
715 | sprintf(name, "%08x", | |
716 | atomic_inc_return(&iucv_sk_list.autobind_name)); | |
717 | } | |
718 | memcpy(iucv->src_name, name, 8); | |
719 | } | |
720 | ||
eac3731b JH |
721 | /* Bind an unbound socket */ |
722 | static int iucv_sock_bind(struct socket *sock, struct sockaddr *addr, | |
723 | int addr_len) | |
724 | { | |
725 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
726 | struct sock *sk = sock->sk; | |
727 | struct iucv_sock *iucv; | |
3881ac44 UB |
728 | int err = 0; |
729 | struct net_device *dev; | |
730 | char uid[9]; | |
eac3731b JH |
731 | |
732 | /* Verify the input sockaddr */ | |
e3c42b61 MJ |
733 | if (addr_len < sizeof(struct sockaddr_iucv) || |
734 | addr->sa_family != AF_IUCV) | |
52a82e23 UB |
735 | return -EINVAL; |
736 | ||
eac3731b JH |
737 | lock_sock(sk); |
738 | if (sk->sk_state != IUCV_OPEN) { | |
739 | err = -EBADFD; | |
740 | goto done; | |
741 | } | |
742 | ||
743 | write_lock_bh(&iucv_sk_list.lock); | |
744 | ||
745 | iucv = iucv_sk(sk); | |
746 | if (__iucv_get_sock_by_name(sa->siucv_name)) { | |
747 | err = -EADDRINUSE; | |
748 | goto done_unlock; | |
749 | } | |
3881ac44 | 750 | if (iucv->path) |
eac3731b | 751 | goto done_unlock; |
eac3731b JH |
752 | |
753 | /* Bind the socket */ | |
3881ac44 UB |
754 | if (pr_iucv) |
755 | if (!memcmp(sa->siucv_user_id, iucv_userid, 8)) | |
756 | goto vm_bind; /* VM IUCV transport */ | |
eac3731b | 757 | |
3881ac44 UB |
758 | /* try hiper transport */ |
759 | memcpy(uid, sa->siucv_user_id, sizeof(uid)); | |
760 | ASCEBC(uid, 8); | |
761 | rcu_read_lock(); | |
762 | for_each_netdev_rcu(&init_net, dev) { | |
763 | if (!memcmp(dev->perm_addr, uid, 8)) { | |
3881ac44 | 764 | memcpy(iucv->src_user_id, sa->siucv_user_id, 8); |
53a4b499 PH |
765 | /* Check for unitialized siucv_name */ |
766 | if (strncmp(sa->siucv_name, " ", 8) == 0) | |
767 | __iucv_auto_name(iucv); | |
768 | else | |
769 | memcpy(iucv->src_name, sa->siucv_name, 8); | |
816abbad | 770 | sk->sk_bound_dev_if = dev->ifindex; |
800c5eb7 UB |
771 | iucv->hs_dev = dev; |
772 | dev_hold(dev); | |
3881ac44 UB |
773 | sk->sk_state = IUCV_BOUND; |
774 | iucv->transport = AF_IUCV_TRANS_HIPER; | |
775 | if (!iucv->msglimit) | |
776 | iucv->msglimit = IUCV_HIPER_MSGLIM_DEFAULT; | |
777 | rcu_read_unlock(); | |
778 | goto done_unlock; | |
779 | } | |
780 | } | |
781 | rcu_read_unlock(); | |
782 | vm_bind: | |
783 | if (pr_iucv) { | |
784 | /* use local userid for backward compat */ | |
785 | memcpy(iucv->src_name, sa->siucv_name, 8); | |
786 | memcpy(iucv->src_user_id, iucv_userid, 8); | |
787 | sk->sk_state = IUCV_BOUND; | |
788 | iucv->transport = AF_IUCV_TRANS_IUCV; | |
fdbf6326 | 789 | sk->sk_allocation |= GFP_DMA; |
3881ac44 UB |
790 | if (!iucv->msglimit) |
791 | iucv->msglimit = IUCV_QUEUELEN_DEFAULT; | |
792 | goto done_unlock; | |
793 | } | |
794 | /* found no dev to bind */ | |
795 | err = -ENODEV; | |
eac3731b JH |
796 | done_unlock: |
797 | /* Release the socket list lock */ | |
798 | write_unlock_bh(&iucv_sk_list.lock); | |
799 | done: | |
800 | release_sock(sk); | |
801 | return err; | |
802 | } | |
803 | ||
804 | /* Automatically bind an unbound socket */ | |
805 | static int iucv_sock_autobind(struct sock *sk) | |
806 | { | |
807 | struct iucv_sock *iucv = iucv_sk(sk); | |
eac3731b JH |
808 | int err = 0; |
809 | ||
aac6399c | 810 | if (unlikely(!pr_iucv)) |
eac3731b JH |
811 | return -EPROTO; |
812 | ||
aac6399c | 813 | memcpy(iucv->src_user_id, iucv_userid, 8); |
fdbf6326 JW |
814 | iucv->transport = AF_IUCV_TRANS_IUCV; |
815 | sk->sk_allocation |= GFP_DMA; | |
eac3731b JH |
816 | |
817 | write_lock_bh(&iucv_sk_list.lock); | |
53a4b499 | 818 | __iucv_auto_name(iucv); |
eac3731b JH |
819 | write_unlock_bh(&iucv_sk_list.lock); |
820 | ||
3881ac44 UB |
821 | if (!iucv->msglimit) |
822 | iucv->msglimit = IUCV_QUEUELEN_DEFAULT; | |
823 | ||
eac3731b JH |
824 | return err; |
825 | } | |
826 | ||
3881ac44 | 827 | static int afiucv_path_connect(struct socket *sock, struct sockaddr *addr) |
eac3731b JH |
828 | { |
829 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
830 | struct sock *sk = sock->sk; | |
493d3971 | 831 | struct iucv_sock *iucv = iucv_sk(sk); |
eac3731b JH |
832 | unsigned char user_data[16]; |
833 | int err; | |
834 | ||
eac3731b | 835 | high_nmcpy(user_data, sa->siucv_name); |
493d3971 | 836 | low_nmcpy(user_data, iucv->src_name); |
eac3731b JH |
837 | ASCEBC(user_data, sizeof(user_data)); |
838 | ||
eac3731b | 839 | /* Create path. */ |
09488e2e | 840 | iucv->path = iucv_path_alloc(iucv->msglimit, |
b8942e3b | 841 | IUCV_IPRMDATA, GFP_KERNEL); |
d4444722 UB |
842 | if (!iucv->path) { |
843 | err = -ENOMEM; | |
844 | goto done; | |
845 | } | |
6fcd61f7 FB |
846 | err = pr_iucv->path_connect(iucv->path, &af_iucv_handler, |
847 | sa->siucv_user_id, NULL, user_data, | |
848 | sk); | |
eac3731b JH |
849 | if (err) { |
850 | iucv_path_free(iucv->path); | |
851 | iucv->path = NULL; | |
55cdea9e HB |
852 | switch (err) { |
853 | case 0x0b: /* Target communicator is not logged on */ | |
854 | err = -ENETUNREACH; | |
855 | break; | |
856 | case 0x0d: /* Max connections for this guest exceeded */ | |
857 | case 0x0e: /* Max connections for target guest exceeded */ | |
858 | err = -EAGAIN; | |
859 | break; | |
860 | case 0x0f: /* Missing IUCV authorization */ | |
861 | err = -EACCES; | |
862 | break; | |
863 | default: | |
864 | err = -ECONNREFUSED; | |
865 | break; | |
866 | } | |
eac3731b | 867 | } |
3881ac44 UB |
868 | done: |
869 | return err; | |
870 | } | |
eac3731b | 871 | |
3881ac44 UB |
872 | /* Connect an unconnected socket */ |
873 | static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr, | |
874 | int alen, int flags) | |
875 | { | |
876 | struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; | |
877 | struct sock *sk = sock->sk; | |
878 | struct iucv_sock *iucv = iucv_sk(sk); | |
879 | int err; | |
880 | ||
e3c42b61 | 881 | if (alen < sizeof(struct sockaddr_iucv) || addr->sa_family != AF_IUCV) |
3881ac44 UB |
882 | return -EINVAL; |
883 | ||
884 | if (sk->sk_state != IUCV_OPEN && sk->sk_state != IUCV_BOUND) | |
885 | return -EBADFD; | |
886 | ||
887 | if (sk->sk_state == IUCV_OPEN && | |
888 | iucv->transport == AF_IUCV_TRANS_HIPER) | |
889 | return -EBADFD; /* explicit bind required */ | |
890 | ||
891 | if (sk->sk_type != SOCK_STREAM && sk->sk_type != SOCK_SEQPACKET) | |
892 | return -EINVAL; | |
893 | ||
894 | if (sk->sk_state == IUCV_OPEN) { | |
895 | err = iucv_sock_autobind(sk); | |
896 | if (unlikely(err)) | |
897 | return err; | |
898 | } | |
899 | ||
900 | lock_sock(sk); | |
901 | ||
902 | /* Set the destination information */ | |
903 | memcpy(iucv->dst_user_id, sa->siucv_user_id, 8); | |
904 | memcpy(iucv->dst_name, sa->siucv_name, 8); | |
905 | ||
906 | if (iucv->transport == AF_IUCV_TRANS_HIPER) | |
9fbd87d4 | 907 | err = iucv_send_ctrl(sock->sk, AF_IUCV_FLAG_SYN); |
3881ac44 UB |
908 | else |
909 | err = afiucv_path_connect(sock, addr); | |
910 | if (err) | |
911 | goto done; | |
912 | ||
913 | if (sk->sk_state != IUCV_CONNECTED) | |
0ea920d2 HB |
914 | err = iucv_sock_wait(sk, iucv_sock_in_state(sk, IUCV_CONNECTED, |
915 | IUCV_DISCONN), | |
916 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
eac3731b | 917 | |
3881ac44 | 918 | if (sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_CLOSED) |
b8942e3b | 919 | err = -ECONNREFUSED; |
18becbc5 | 920 | |
7d316b94 UB |
921 | if (err && iucv->transport == AF_IUCV_TRANS_IUCV) |
922 | iucv_sever_path(sk, 0); | |
18becbc5 | 923 | |
eac3731b JH |
924 | done: |
925 | release_sock(sk); | |
926 | return err; | |
927 | } | |
928 | ||
929 | /* Move a socket into listening state. */ | |
930 | static int iucv_sock_listen(struct socket *sock, int backlog) | |
931 | { | |
932 | struct sock *sk = sock->sk; | |
933 | int err; | |
934 | ||
935 | lock_sock(sk); | |
936 | ||
937 | err = -EINVAL; | |
aa8e71f5 HB |
938 | if (sk->sk_state != IUCV_BOUND) |
939 | goto done; | |
940 | ||
941 | if (sock->type != SOCK_STREAM && sock->type != SOCK_SEQPACKET) | |
eac3731b JH |
942 | goto done; |
943 | ||
944 | sk->sk_max_ack_backlog = backlog; | |
945 | sk->sk_ack_backlog = 0; | |
946 | sk->sk_state = IUCV_LISTEN; | |
947 | err = 0; | |
948 | ||
949 | done: | |
950 | release_sock(sk); | |
951 | return err; | |
952 | } | |
953 | ||
954 | /* Accept a pending connection */ | |
955 | static int iucv_sock_accept(struct socket *sock, struct socket *newsock, | |
cdfbabfb | 956 | int flags, bool kern) |
eac3731b JH |
957 | { |
958 | DECLARE_WAITQUEUE(wait, current); | |
959 | struct sock *sk = sock->sk, *nsk; | |
960 | long timeo; | |
961 | int err = 0; | |
962 | ||
561e0360 | 963 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
eac3731b JH |
964 | |
965 | if (sk->sk_state != IUCV_LISTEN) { | |
966 | err = -EBADFD; | |
967 | goto done; | |
968 | } | |
969 | ||
970 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
971 | ||
972 | /* Wait for an incoming connection */ | |
aa395145 | 973 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
da99f056 | 974 | while (!(nsk = iucv_accept_dequeue(sk, newsock))) { |
eac3731b JH |
975 | set_current_state(TASK_INTERRUPTIBLE); |
976 | if (!timeo) { | |
977 | err = -EAGAIN; | |
978 | break; | |
979 | } | |
980 | ||
981 | release_sock(sk); | |
982 | timeo = schedule_timeout(timeo); | |
561e0360 | 983 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
eac3731b JH |
984 | |
985 | if (sk->sk_state != IUCV_LISTEN) { | |
986 | err = -EBADFD; | |
987 | break; | |
988 | } | |
989 | ||
990 | if (signal_pending(current)) { | |
991 | err = sock_intr_errno(timeo); | |
992 | break; | |
993 | } | |
994 | } | |
995 | ||
996 | set_current_state(TASK_RUNNING); | |
aa395145 | 997 | remove_wait_queue(sk_sleep(sk), &wait); |
eac3731b JH |
998 | |
999 | if (err) | |
1000 | goto done; | |
1001 | ||
1002 | newsock->state = SS_CONNECTED; | |
1003 | ||
1004 | done: | |
1005 | release_sock(sk); | |
1006 | return err; | |
1007 | } | |
1008 | ||
1009 | static int iucv_sock_getname(struct socket *sock, struct sockaddr *addr, | |
9b2c45d4 | 1010 | int peer) |
eac3731b JH |
1011 | { |
1012 | struct sockaddr_iucv *siucv = (struct sockaddr_iucv *) addr; | |
1013 | struct sock *sk = sock->sk; | |
493d3971 | 1014 | struct iucv_sock *iucv = iucv_sk(sk); |
eac3731b JH |
1015 | |
1016 | addr->sa_family = AF_IUCV; | |
eac3731b JH |
1017 | |
1018 | if (peer) { | |
493d3971 UB |
1019 | memcpy(siucv->siucv_user_id, iucv->dst_user_id, 8); |
1020 | memcpy(siucv->siucv_name, iucv->dst_name, 8); | |
eac3731b | 1021 | } else { |
493d3971 UB |
1022 | memcpy(siucv->siucv_user_id, iucv->src_user_id, 8); |
1023 | memcpy(siucv->siucv_name, iucv->src_name, 8); | |
eac3731b JH |
1024 | } |
1025 | memset(&siucv->siucv_port, 0, sizeof(siucv->siucv_port)); | |
1026 | memset(&siucv->siucv_addr, 0, sizeof(siucv->siucv_addr)); | |
493d3971 | 1027 | memset(&siucv->siucv_nodeid, 0, sizeof(siucv->siucv_nodeid)); |
eac3731b | 1028 | |
9b2c45d4 | 1029 | return sizeof(struct sockaddr_iucv); |
eac3731b JH |
1030 | } |
1031 | ||
b8942e3b HB |
1032 | /** |
1033 | * iucv_send_iprm() - Send socket data in parameter list of an iucv message. | |
1034 | * @path: IUCV path | |
1035 | * @msg: Pointer to a struct iucv_message | |
1036 | * @skb: The socket data to send, skb->len MUST BE <= 7 | |
1037 | * | |
1038 | * Send the socket data in the parameter list in the iucv message | |
1039 | * (IUCV_IPRMDATA). The socket data is stored at index 0 to 6 in the parameter | |
1040 | * list and the socket data len at index 7 (last byte). | |
1041 | * See also iucv_msg_length(). | |
1042 | * | |
1043 | * Returns the error code from the iucv_message_send() call. | |
1044 | */ | |
1045 | static int iucv_send_iprm(struct iucv_path *path, struct iucv_message *msg, | |
1046 | struct sk_buff *skb) | |
1047 | { | |
1048 | u8 prmdata[8]; | |
1049 | ||
1050 | memcpy(prmdata, (void *) skb->data, skb->len); | |
1051 | prmdata[7] = 0xff - (u8) skb->len; | |
6fcd61f7 | 1052 | return pr_iucv->message_send(path, msg, IUCV_IPRMDATA, 0, |
b8942e3b HB |
1053 | (void *) prmdata, 8); |
1054 | } | |
1055 | ||
1b784140 YX |
1056 | static int iucv_sock_sendmsg(struct socket *sock, struct msghdr *msg, |
1057 | size_t len) | |
eac3731b JH |
1058 | { |
1059 | struct sock *sk = sock->sk; | |
1060 | struct iucv_sock *iucv = iucv_sk(sk); | |
dc5367bc JW |
1061 | size_t headroom = 0; |
1062 | size_t linear; | |
eac3731b | 1063 | struct sk_buff *skb; |
0506eb01 | 1064 | struct iucv_message txmsg = {0}; |
44b1e6b5 HB |
1065 | struct cmsghdr *cmsg; |
1066 | int cmsg_done; | |
0ea920d2 | 1067 | long timeo; |
8f7c502c UB |
1068 | char user_id[9]; |
1069 | char appl_id[9]; | |
eac3731b | 1070 | int err; |
0ea920d2 | 1071 | int noblock = msg->msg_flags & MSG_DONTWAIT; |
eac3731b JH |
1072 | |
1073 | err = sock_error(sk); | |
1074 | if (err) | |
1075 | return err; | |
1076 | ||
1077 | if (msg->msg_flags & MSG_OOB) | |
1078 | return -EOPNOTSUPP; | |
1079 | ||
aa8e71f5 HB |
1080 | /* SOCK_SEQPACKET: we do not support segmented records */ |
1081 | if (sk->sk_type == SOCK_SEQPACKET && !(msg->msg_flags & MSG_EOR)) | |
1082 | return -EOPNOTSUPP; | |
1083 | ||
eac3731b JH |
1084 | lock_sock(sk); |
1085 | ||
1086 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1087 | err = -EPIPE; | |
1088 | goto out; | |
1089 | } | |
1090 | ||
bb664f49 HB |
1091 | /* Return if the socket is not in connected state */ |
1092 | if (sk->sk_state != IUCV_CONNECTED) { | |
1093 | err = -ENOTCONN; | |
1094 | goto out; | |
1095 | } | |
44b1e6b5 | 1096 | |
bb664f49 HB |
1097 | /* initialize defaults */ |
1098 | cmsg_done = 0; /* check for duplicate headers */ | |
1099 | txmsg.class = 0; | |
44b1e6b5 | 1100 | |
bb664f49 | 1101 | /* iterate over control messages */ |
f95b414e | 1102 | for_each_cmsghdr(cmsg, msg) { |
bb664f49 HB |
1103 | if (!CMSG_OK(msg, cmsg)) { |
1104 | err = -EINVAL; | |
1105 | goto out; | |
1106 | } | |
44b1e6b5 | 1107 | |
bb664f49 HB |
1108 | if (cmsg->cmsg_level != SOL_IUCV) |
1109 | continue; | |
44b1e6b5 | 1110 | |
bb664f49 HB |
1111 | if (cmsg->cmsg_type & cmsg_done) { |
1112 | err = -EINVAL; | |
1113 | goto out; | |
1114 | } | |
1115 | cmsg_done |= cmsg->cmsg_type; | |
44b1e6b5 | 1116 | |
bb664f49 HB |
1117 | switch (cmsg->cmsg_type) { |
1118 | case SCM_IUCV_TRGCLS: | |
1119 | if (cmsg->cmsg_len != CMSG_LEN(TRGCLS_SIZE)) { | |
44b1e6b5 HB |
1120 | err = -EINVAL; |
1121 | goto out; | |
1122 | } | |
44b1e6b5 | 1123 | |
bb664f49 HB |
1124 | /* set iucv message target class */ |
1125 | memcpy(&txmsg.class, | |
1126 | (void *) CMSG_DATA(cmsg), TRGCLS_SIZE); | |
44b1e6b5 | 1127 | |
bb664f49 | 1128 | break; |
44b1e6b5 | 1129 | |
bb664f49 HB |
1130 | default: |
1131 | err = -EINVAL; | |
1132 | goto out; | |
44b1e6b5 | 1133 | } |
bb664f49 | 1134 | } |
44b1e6b5 | 1135 | |
bb664f49 HB |
1136 | /* allocate one skb for each iucv message: |
1137 | * this is fine for SOCK_SEQPACKET (unless we want to support | |
1138 | * segmented records using the MSG_EOR flag), but | |
1139 | * for SOCK_STREAM we might want to improve it in future */ | |
dc5367bc | 1140 | if (iucv->transport == AF_IUCV_TRANS_HIPER) { |
238965b7 JW |
1141 | headroom = sizeof(struct af_iucv_trans_hdr) + |
1142 | LL_RESERVED_SPACE(iucv->hs_dev); | |
e5374399 EC |
1143 | linear = len; |
1144 | } else { | |
dc5367bc JW |
1145 | if (len < PAGE_SIZE) { |
1146 | linear = len; | |
1147 | } else { | |
1148 | /* In nonlinear "classic" iucv skb, | |
1149 | * reserve space for iucv_array | |
1150 | */ | |
1151 | headroom = sizeof(struct iucv_array) * | |
1152 | (MAX_SKB_FRAGS + 1); | |
1153 | linear = PAGE_SIZE - headroom; | |
1154 | } | |
e5374399 EC |
1155 | } |
1156 | skb = sock_alloc_send_pskb(sk, headroom + linear, len - linear, | |
1157 | noblock, &err, 0); | |
ed4ac422 | 1158 | if (!skb) |
bb664f49 | 1159 | goto out; |
e5374399 EC |
1160 | if (headroom) |
1161 | skb_reserve(skb, headroom); | |
1162 | skb_put(skb, linear); | |
1163 | skb->len = len; | |
1164 | skb->data_len = len - linear; | |
1165 | err = skb_copy_datagram_from_iter(skb, 0, &msg->msg_iter, len); | |
1166 | if (err) | |
bb664f49 | 1167 | goto fail; |
eac3731b | 1168 | |
0ea920d2 HB |
1169 | /* wait if outstanding messages for iucv path has reached */ |
1170 | timeo = sock_sndtimeo(sk, noblock); | |
1171 | err = iucv_sock_wait(sk, iucv_below_msglim(sk), timeo); | |
1172 | if (err) | |
1173 | goto fail; | |
eac3731b | 1174 | |
0ea920d2 HB |
1175 | /* return -ECONNRESET if the socket is no longer connected */ |
1176 | if (sk->sk_state != IUCV_CONNECTED) { | |
1177 | err = -ECONNRESET; | |
1178 | goto fail; | |
1179 | } | |
b8942e3b | 1180 | |
bb664f49 HB |
1181 | /* increment and save iucv message tag for msg_completion cbk */ |
1182 | txmsg.tag = iucv->send_tag++; | |
f9c41a62 | 1183 | IUCV_SKB_CB(skb)->tag = txmsg.tag; |
800c5eb7 | 1184 | |
3881ac44 UB |
1185 | if (iucv->transport == AF_IUCV_TRANS_HIPER) { |
1186 | atomic_inc(&iucv->msg_sent); | |
1187 | err = afiucv_hs_send(&txmsg, sk, skb, 0); | |
1188 | if (err) { | |
1189 | atomic_dec(&iucv->msg_sent); | |
b2f54394 | 1190 | goto out; |
3881ac44 | 1191 | } |
e5374399 EC |
1192 | } else { /* Classic VM IUCV transport */ |
1193 | skb_queue_tail(&iucv->send_skb_q, skb); | |
1194 | ||
1195 | if (((iucv->path->flags & IUCV_IPRMDATA) & iucv->flags) && | |
1196 | skb->len <= 7) { | |
1197 | err = iucv_send_iprm(iucv->path, &txmsg, skb); | |
1198 | ||
1199 | /* on success: there is no message_complete callback */ | |
1200 | /* for an IPRMDATA msg; remove skb from send queue */ | |
1201 | if (err == 0) { | |
1202 | skb_unlink(skb, &iucv->send_skb_q); | |
1203 | kfree_skb(skb); | |
1204 | } | |
b8942e3b | 1205 | |
e5374399 EC |
1206 | /* this error should never happen since the */ |
1207 | /* IUCV_IPRMDATA path flag is set... sever path */ | |
1208 | if (err == 0x15) { | |
1209 | pr_iucv->path_sever(iucv->path, NULL); | |
1210 | skb_unlink(skb, &iucv->send_skb_q); | |
1211 | err = -EPIPE; | |
1212 | goto fail; | |
1213 | } | |
1214 | } else if (skb_is_nonlinear(skb)) { | |
1215 | struct iucv_array *iba = (struct iucv_array *)skb->head; | |
1216 | int i; | |
1217 | ||
1218 | /* skip iucv_array lying in the headroom */ | |
1219 | iba[0].address = (u32)(addr_t)skb->data; | |
1220 | iba[0].length = (u32)skb_headlen(skb); | |
1221 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1222 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1223 | ||
1224 | iba[i + 1].address = | |
1225 | (u32)(addr_t)skb_frag_address(frag); | |
1226 | iba[i + 1].length = (u32)skb_frag_size(frag); | |
1227 | } | |
1228 | err = pr_iucv->message_send(iucv->path, &txmsg, | |
1229 | IUCV_IPBUFLST, 0, | |
1230 | (void *)iba, skb->len); | |
1231 | } else { /* non-IPRM Linear skb */ | |
1232 | err = pr_iucv->message_send(iucv->path, &txmsg, | |
1233 | 0, 0, (void *)skb->data, skb->len); | |
bb664f49 | 1234 | } |
e5374399 EC |
1235 | if (err) { |
1236 | if (err == 3) { | |
1237 | user_id[8] = 0; | |
1238 | memcpy(user_id, iucv->dst_user_id, 8); | |
1239 | appl_id[8] = 0; | |
1240 | memcpy(appl_id, iucv->dst_name, 8); | |
1241 | pr_err( | |
1242 | "Application %s on z/VM guest %s exceeds message limit\n", | |
1243 | appl_id, user_id); | |
1244 | err = -EAGAIN; | |
1245 | } else { | |
1246 | err = -EPIPE; | |
1247 | } | |
eac3731b | 1248 | skb_unlink(skb, &iucv->send_skb_q); |
eac3731b JH |
1249 | goto fail; |
1250 | } | |
eac3731b JH |
1251 | } |
1252 | ||
1253 | release_sock(sk); | |
1254 | return len; | |
1255 | ||
1256 | fail: | |
1257 | kfree_skb(skb); | |
1258 | out: | |
1259 | release_sock(sk); | |
1260 | return err; | |
1261 | } | |
1262 | ||
a006353a EC |
1263 | static struct sk_buff *alloc_iucv_recv_skb(unsigned long len) |
1264 | { | |
1265 | size_t headroom, linear; | |
1266 | struct sk_buff *skb; | |
1267 | int err; | |
1268 | ||
1269 | if (len < PAGE_SIZE) { | |
1270 | headroom = 0; | |
1271 | linear = len; | |
1272 | } else { | |
1273 | headroom = sizeof(struct iucv_array) * (MAX_SKB_FRAGS + 1); | |
1274 | linear = PAGE_SIZE - headroom; | |
1275 | } | |
1276 | skb = alloc_skb_with_frags(headroom + linear, len - linear, | |
1277 | 0, &err, GFP_ATOMIC | GFP_DMA); | |
1278 | WARN_ONCE(!skb, | |
1279 | "alloc of recv iucv skb len=%lu failed with errcode=%d\n", | |
1280 | len, err); | |
1281 | if (skb) { | |
1282 | if (headroom) | |
1283 | skb_reserve(skb, headroom); | |
1284 | skb_put(skb, linear); | |
1285 | skb->len = len; | |
1286 | skb->data_len = len - linear; | |
1287 | } | |
1288 | return skb; | |
1289 | } | |
1290 | ||
bf95d20f HB |
1291 | /* iucv_process_message() - Receive a single outstanding IUCV message |
1292 | * | |
1293 | * Locking: must be called with message_q.lock held | |
1294 | */ | |
f0703c80 UB |
1295 | static void iucv_process_message(struct sock *sk, struct sk_buff *skb, |
1296 | struct iucv_path *path, | |
1297 | struct iucv_message *msg) | |
1298 | { | |
1299 | int rc; | |
b8942e3b HB |
1300 | unsigned int len; |
1301 | ||
1302 | len = iucv_msg_length(msg); | |
f0703c80 | 1303 | |
44b1e6b5 HB |
1304 | /* store msg target class in the second 4 bytes of skb ctrl buffer */ |
1305 | /* Note: the first 4 bytes are reserved for msg tag */ | |
f9c41a62 | 1306 | IUCV_SKB_CB(skb)->class = msg->class; |
44b1e6b5 | 1307 | |
b8942e3b HB |
1308 | /* check for special IPRM messages (e.g. iucv_sock_shutdown) */ |
1309 | if ((msg->flags & IUCV_IPRMDATA) && len > 7) { | |
1310 | if (memcmp(msg->rmmsg, iprm_shutdown, 8) == 0) { | |
1311 | skb->data = NULL; | |
1312 | skb->len = 0; | |
1313 | } | |
f0703c80 | 1314 | } else { |
a006353a EC |
1315 | if (skb_is_nonlinear(skb)) { |
1316 | struct iucv_array *iba = (struct iucv_array *)skb->head; | |
1317 | int i; | |
1318 | ||
1319 | iba[0].address = (u32)(addr_t)skb->data; | |
1320 | iba[0].length = (u32)skb_headlen(skb); | |
1321 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1322 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1323 | ||
1324 | iba[i + 1].address = | |
1325 | (u32)(addr_t)skb_frag_address(frag); | |
1326 | iba[i + 1].length = (u32)skb_frag_size(frag); | |
1327 | } | |
1328 | rc = pr_iucv->message_receive(path, msg, | |
1329 | IUCV_IPBUFLST, | |
1330 | (void *)iba, len, NULL); | |
1331 | } else { | |
1332 | rc = pr_iucv->message_receive(path, msg, | |
6fcd61f7 FB |
1333 | msg->flags & IUCV_IPRMDATA, |
1334 | skb->data, len, NULL); | |
a006353a | 1335 | } |
f0703c80 UB |
1336 | if (rc) { |
1337 | kfree_skb(skb); | |
1338 | return; | |
1339 | } | |
a006353a | 1340 | WARN_ON_ONCE(skb->len != len); |
f0703c80 UB |
1341 | } |
1342 | ||
f9c41a62 | 1343 | IUCV_SKB_CB(skb)->offset = 0; |
8c68b1a0 UB |
1344 | if (sk_filter(sk, skb)) { |
1345 | atomic_inc(&sk->sk_drops); /* skb rejected by filter */ | |
1346 | kfree_skb(skb); | |
1347 | return; | |
1348 | } | |
1349 | if (__sock_queue_rcv_skb(sk, skb)) /* handle rcv queue full */ | |
1350 | skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, skb); | |
f0703c80 UB |
1351 | } |
1352 | ||
bf95d20f HB |
1353 | /* iucv_process_message_q() - Process outstanding IUCV messages |
1354 | * | |
1355 | * Locking: must be called with message_q.lock held | |
1356 | */ | |
f0703c80 UB |
1357 | static void iucv_process_message_q(struct sock *sk) |
1358 | { | |
1359 | struct iucv_sock *iucv = iucv_sk(sk); | |
1360 | struct sk_buff *skb; | |
1361 | struct sock_msg_q *p, *n; | |
1362 | ||
1363 | list_for_each_entry_safe(p, n, &iucv->message_q.list, list) { | |
a006353a | 1364 | skb = alloc_iucv_recv_skb(iucv_msg_length(&p->msg)); |
f0703c80 UB |
1365 | if (!skb) |
1366 | break; | |
1367 | iucv_process_message(sk, skb, p->path, &p->msg); | |
1368 | list_del(&p->list); | |
1369 | kfree(p); | |
1370 | if (!skb_queue_empty(&iucv->backlog_skb_q)) | |
1371 | break; | |
1372 | } | |
1373 | } | |
1374 | ||
1b784140 YX |
1375 | static int iucv_sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1376 | size_t len, int flags) | |
eac3731b JH |
1377 | { |
1378 | int noblock = flags & MSG_DONTWAIT; | |
1379 | struct sock *sk = sock->sk; | |
561e0360 | 1380 | struct iucv_sock *iucv = iucv_sk(sk); |
aa8e71f5 | 1381 | unsigned int copied, rlen; |
9fbd87d4 | 1382 | struct sk_buff *skb, *rskb, *cskb; |
eac3731b | 1383 | int err = 0; |
f9c41a62 | 1384 | u32 offset; |
eac3731b | 1385 | |
aac6399c | 1386 | if ((sk->sk_state == IUCV_DISCONN) && |
f0703c80 UB |
1387 | skb_queue_empty(&iucv->backlog_skb_q) && |
1388 | skb_queue_empty(&sk->sk_receive_queue) && | |
1389 | list_empty(&iucv->message_q.list)) | |
561e0360 JH |
1390 | return 0; |
1391 | ||
eac3731b JH |
1392 | if (flags & (MSG_OOB)) |
1393 | return -EOPNOTSUPP; | |
1394 | ||
60d3705f HB |
1395 | /* receive/dequeue next skb: |
1396 | * the function understands MSG_PEEK and, thus, does not dequeue skb */ | |
eac3731b JH |
1397 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
1398 | if (!skb) { | |
1399 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
1400 | return 0; | |
1401 | return err; | |
1402 | } | |
1403 | ||
f9c41a62 UB |
1404 | offset = IUCV_SKB_CB(skb)->offset; |
1405 | rlen = skb->len - offset; /* real length of skb */ | |
aa8e71f5 | 1406 | copied = min_t(unsigned int, rlen, len); |
82492a35 UB |
1407 | if (!rlen) |
1408 | sk->sk_shutdown = sk->sk_shutdown | RCV_SHUTDOWN; | |
eac3731b | 1409 | |
561e0360 | 1410 | cskb = skb; |
51f3d02b | 1411 | if (skb_copy_datagram_msg(cskb, offset, msg, copied)) { |
802788bf HB |
1412 | if (!(flags & MSG_PEEK)) |
1413 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1414 | return -EFAULT; | |
eac3731b JH |
1415 | } |
1416 | ||
aa8e71f5 HB |
1417 | /* SOCK_SEQPACKET: set MSG_TRUNC if recv buf size is too small */ |
1418 | if (sk->sk_type == SOCK_SEQPACKET) { | |
1419 | if (copied < rlen) | |
1420 | msg->msg_flags |= MSG_TRUNC; | |
1421 | /* each iucv message contains a complete record */ | |
1422 | msg->msg_flags |= MSG_EOR; | |
1423 | } | |
eac3731b | 1424 | |
44b1e6b5 HB |
1425 | /* create control message to store iucv msg target class: |
1426 | * get the trgcls from the control buffer of the skb due to | |
1427 | * fragmentation of original iucv message. */ | |
1428 | err = put_cmsg(msg, SOL_IUCV, SCM_IUCV_TRGCLS, | |
f9c41a62 UB |
1429 | sizeof(IUCV_SKB_CB(skb)->class), |
1430 | (void *)&IUCV_SKB_CB(skb)->class); | |
44b1e6b5 HB |
1431 | if (err) { |
1432 | if (!(flags & MSG_PEEK)) | |
1433 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1434 | return err; | |
1435 | } | |
1436 | ||
eac3731b JH |
1437 | /* Mark read part of skb as used */ |
1438 | if (!(flags & MSG_PEEK)) { | |
eac3731b | 1439 | |
aa8e71f5 HB |
1440 | /* SOCK_STREAM: re-queue skb if it contains unreceived data */ |
1441 | if (sk->sk_type == SOCK_STREAM) { | |
f9c41a62 UB |
1442 | if (copied < rlen) { |
1443 | IUCV_SKB_CB(skb)->offset = offset + copied; | |
2f139a5d | 1444 | skb_queue_head(&sk->sk_receive_queue, skb); |
aa8e71f5 HB |
1445 | goto done; |
1446 | } | |
eac3731b JH |
1447 | } |
1448 | ||
1449 | kfree_skb(skb); | |
800c5eb7 UB |
1450 | if (iucv->transport == AF_IUCV_TRANS_HIPER) { |
1451 | atomic_inc(&iucv->msg_recv); | |
1452 | if (atomic_read(&iucv->msg_recv) > iucv->msglimit) { | |
1453 | WARN_ON(1); | |
1454 | iucv_sock_close(sk); | |
1455 | return -EFAULT; | |
1456 | } | |
1457 | } | |
561e0360 JH |
1458 | |
1459 | /* Queue backlog skbs */ | |
bf95d20f | 1460 | spin_lock_bh(&iucv->message_q.lock); |
f0703c80 | 1461 | rskb = skb_dequeue(&iucv->backlog_skb_q); |
da99f056 | 1462 | while (rskb) { |
f9c41a62 | 1463 | IUCV_SKB_CB(rskb)->offset = 0; |
8c68b1a0 UB |
1464 | if (__sock_queue_rcv_skb(sk, rskb)) { |
1465 | /* handle rcv queue full */ | |
f0703c80 | 1466 | skb_queue_head(&iucv->backlog_skb_q, |
561e0360 JH |
1467 | rskb); |
1468 | break; | |
561e0360 | 1469 | } |
8c68b1a0 | 1470 | rskb = skb_dequeue(&iucv->backlog_skb_q); |
561e0360 | 1471 | } |
f0703c80 | 1472 | if (skb_queue_empty(&iucv->backlog_skb_q)) { |
f0703c80 UB |
1473 | if (!list_empty(&iucv->message_q.list)) |
1474 | iucv_process_message_q(sk); | |
3881ac44 UB |
1475 | if (atomic_read(&iucv->msg_recv) >= |
1476 | iucv->msglimit / 2) { | |
9fbd87d4 | 1477 | err = iucv_send_ctrl(sk, AF_IUCV_FLAG_WIN); |
3881ac44 UB |
1478 | if (err) { |
1479 | sk->sk_state = IUCV_DISCONN; | |
1480 | sk->sk_state_change(sk); | |
1481 | } | |
1482 | } | |
f0703c80 | 1483 | } |
bf95d20f | 1484 | spin_unlock_bh(&iucv->message_q.lock); |
60d3705f | 1485 | } |
eac3731b JH |
1486 | |
1487 | done: | |
aa8e71f5 HB |
1488 | /* SOCK_SEQPACKET: return real length if MSG_TRUNC is set */ |
1489 | if (sk->sk_type == SOCK_SEQPACKET && (flags & MSG_TRUNC)) | |
1490 | copied = rlen; | |
1491 | ||
1492 | return copied; | |
eac3731b JH |
1493 | } |
1494 | ||
ade994f4 | 1495 | static inline __poll_t iucv_accept_poll(struct sock *parent) |
eac3731b JH |
1496 | { |
1497 | struct iucv_sock *isk, *n; | |
1498 | struct sock *sk; | |
1499 | ||
da99f056 | 1500 | list_for_each_entry_safe(isk, n, &iucv_sk(parent)->accept_q, accept_q) { |
eac3731b JH |
1501 | sk = (struct sock *) isk; |
1502 | ||
1503 | if (sk->sk_state == IUCV_CONNECTED) | |
a9a08845 | 1504 | return EPOLLIN | EPOLLRDNORM; |
eac3731b JH |
1505 | } |
1506 | ||
1507 | return 0; | |
1508 | } | |
1509 | ||
a11e1d43 LT |
1510 | __poll_t iucv_sock_poll(struct file *file, struct socket *sock, |
1511 | poll_table *wait) | |
eac3731b JH |
1512 | { |
1513 | struct sock *sk = sock->sk; | |
ade994f4 | 1514 | __poll_t mask = 0; |
eac3731b | 1515 | |
89ab066d | 1516 | sock_poll_wait(file, sock, wait); |
a11e1d43 | 1517 | |
eac3731b JH |
1518 | if (sk->sk_state == IUCV_LISTEN) |
1519 | return iucv_accept_poll(sk); | |
1520 | ||
1521 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
a9a08845 LT |
1522 | mask |= EPOLLERR | |
1523 | (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0); | |
eac3731b JH |
1524 | |
1525 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
a9a08845 | 1526 | mask |= EPOLLRDHUP; |
eac3731b JH |
1527 | |
1528 | if (sk->sk_shutdown == SHUTDOWN_MASK) | |
a9a08845 | 1529 | mask |= EPOLLHUP; |
eac3731b JH |
1530 | |
1531 | if (!skb_queue_empty(&sk->sk_receive_queue) || | |
da99f056 | 1532 | (sk->sk_shutdown & RCV_SHUTDOWN)) |
a9a08845 | 1533 | mask |= EPOLLIN | EPOLLRDNORM; |
eac3731b JH |
1534 | |
1535 | if (sk->sk_state == IUCV_CLOSED) | |
a9a08845 | 1536 | mask |= EPOLLHUP; |
eac3731b | 1537 | |
aac6399c | 1538 | if (sk->sk_state == IUCV_DISCONN) |
a9a08845 | 1539 | mask |= EPOLLIN; |
561e0360 | 1540 | |
7f1b0ea4 | 1541 | if (sock_writeable(sk) && iucv_below_msglim(sk)) |
a9a08845 | 1542 | mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND; |
eac3731b | 1543 | else |
9cd3e072 | 1544 | sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk); |
eac3731b JH |
1545 | |
1546 | return mask; | |
1547 | } | |
1548 | ||
1549 | static int iucv_sock_shutdown(struct socket *sock, int how) | |
1550 | { | |
1551 | struct sock *sk = sock->sk; | |
1552 | struct iucv_sock *iucv = iucv_sk(sk); | |
1553 | struct iucv_message txmsg; | |
1554 | int err = 0; | |
eac3731b JH |
1555 | |
1556 | how++; | |
1557 | ||
1558 | if ((how & ~SHUTDOWN_MASK) || !how) | |
1559 | return -EINVAL; | |
1560 | ||
1561 | lock_sock(sk); | |
da99f056 | 1562 | switch (sk->sk_state) { |
82492a35 | 1563 | case IUCV_LISTEN: |
e14ad5fa HB |
1564 | case IUCV_DISCONN: |
1565 | case IUCV_CLOSING: | |
eac3731b JH |
1566 | case IUCV_CLOSED: |
1567 | err = -ENOTCONN; | |
1568 | goto fail; | |
eac3731b | 1569 | default: |
eac3731b JH |
1570 | break; |
1571 | } | |
1572 | ||
1573 | if (how == SEND_SHUTDOWN || how == SHUTDOWN_MASK) { | |
82492a35 UB |
1574 | if (iucv->transport == AF_IUCV_TRANS_IUCV) { |
1575 | txmsg.class = 0; | |
1576 | txmsg.tag = 0; | |
1577 | err = pr_iucv->message_send(iucv->path, &txmsg, | |
1578 | IUCV_IPRMDATA, 0, (void *) iprm_shutdown, 8); | |
1579 | if (err) { | |
1580 | switch (err) { | |
1581 | case 1: | |
1582 | err = -ENOTCONN; | |
1583 | break; | |
1584 | case 2: | |
1585 | err = -ECONNRESET; | |
1586 | break; | |
1587 | default: | |
1588 | err = -ENOTCONN; | |
1589 | break; | |
1590 | } | |
eac3731b | 1591 | } |
82492a35 UB |
1592 | } else |
1593 | iucv_send_ctrl(sk, AF_IUCV_FLAG_SHT); | |
eac3731b JH |
1594 | } |
1595 | ||
82492a35 | 1596 | sk->sk_shutdown |= how; |
eac3731b | 1597 | if (how == RCV_SHUTDOWN || how == SHUTDOWN_MASK) { |
1042cab8 UB |
1598 | if ((iucv->transport == AF_IUCV_TRANS_IUCV) && |
1599 | iucv->path) { | |
82492a35 UB |
1600 | err = pr_iucv->path_quiesce(iucv->path, NULL); |
1601 | if (err) | |
1602 | err = -ENOTCONN; | |
1603 | /* skb_queue_purge(&sk->sk_receive_queue); */ | |
1604 | } | |
eac3731b JH |
1605 | skb_queue_purge(&sk->sk_receive_queue); |
1606 | } | |
1607 | ||
1608 | /* Wake up anyone sleeping in poll */ | |
1609 | sk->sk_state_change(sk); | |
1610 | ||
1611 | fail: | |
1612 | release_sock(sk); | |
1613 | return err; | |
1614 | } | |
1615 | ||
1616 | static int iucv_sock_release(struct socket *sock) | |
1617 | { | |
1618 | struct sock *sk = sock->sk; | |
1619 | int err = 0; | |
1620 | ||
1621 | if (!sk) | |
1622 | return 0; | |
1623 | ||
1624 | iucv_sock_close(sk); | |
1625 | ||
eac3731b JH |
1626 | sock_orphan(sk); |
1627 | iucv_sock_kill(sk); | |
1628 | return err; | |
1629 | } | |
1630 | ||
9d5c5d8f HB |
1631 | /* getsockopt and setsockopt */ |
1632 | static int iucv_sock_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 1633 | char __user *optval, unsigned int optlen) |
9d5c5d8f HB |
1634 | { |
1635 | struct sock *sk = sock->sk; | |
1636 | struct iucv_sock *iucv = iucv_sk(sk); | |
1637 | int val; | |
1638 | int rc; | |
1639 | ||
1640 | if (level != SOL_IUCV) | |
1641 | return -ENOPROTOOPT; | |
1642 | ||
1643 | if (optlen < sizeof(int)) | |
1644 | return -EINVAL; | |
1645 | ||
1646 | if (get_user(val, (int __user *) optval)) | |
1647 | return -EFAULT; | |
1648 | ||
1649 | rc = 0; | |
1650 | ||
1651 | lock_sock(sk); | |
1652 | switch (optname) { | |
1653 | case SO_IPRMDATA_MSG: | |
1654 | if (val) | |
1655 | iucv->flags |= IUCV_IPRMDATA; | |
1656 | else | |
1657 | iucv->flags &= ~IUCV_IPRMDATA; | |
1658 | break; | |
09488e2e HB |
1659 | case SO_MSGLIMIT: |
1660 | switch (sk->sk_state) { | |
1661 | case IUCV_OPEN: | |
1662 | case IUCV_BOUND: | |
1663 | if (val < 1 || val > (u16)(~0)) | |
1664 | rc = -EINVAL; | |
1665 | else | |
1666 | iucv->msglimit = val; | |
1667 | break; | |
1668 | default: | |
1669 | rc = -EINVAL; | |
1670 | break; | |
1671 | } | |
1672 | break; | |
9d5c5d8f HB |
1673 | default: |
1674 | rc = -ENOPROTOOPT; | |
1675 | break; | |
1676 | } | |
1677 | release_sock(sk); | |
1678 | ||
1679 | return rc; | |
1680 | } | |
1681 | ||
1682 | static int iucv_sock_getsockopt(struct socket *sock, int level, int optname, | |
1683 | char __user *optval, int __user *optlen) | |
1684 | { | |
1685 | struct sock *sk = sock->sk; | |
1686 | struct iucv_sock *iucv = iucv_sk(sk); | |
51363b87 UB |
1687 | unsigned int val; |
1688 | int len; | |
9d5c5d8f HB |
1689 | |
1690 | if (level != SOL_IUCV) | |
1691 | return -ENOPROTOOPT; | |
1692 | ||
1693 | if (get_user(len, optlen)) | |
1694 | return -EFAULT; | |
1695 | ||
1696 | if (len < 0) | |
1697 | return -EINVAL; | |
1698 | ||
1699 | len = min_t(unsigned int, len, sizeof(int)); | |
1700 | ||
1701 | switch (optname) { | |
1702 | case SO_IPRMDATA_MSG: | |
1703 | val = (iucv->flags & IUCV_IPRMDATA) ? 1 : 0; | |
1704 | break; | |
09488e2e HB |
1705 | case SO_MSGLIMIT: |
1706 | lock_sock(sk); | |
1707 | val = (iucv->path != NULL) ? iucv->path->msglim /* connected */ | |
1708 | : iucv->msglimit; /* default */ | |
1709 | release_sock(sk); | |
1710 | break; | |
51363b87 UB |
1711 | case SO_MSGSIZE: |
1712 | if (sk->sk_state == IUCV_OPEN) | |
1713 | return -EBADFD; | |
1714 | val = (iucv->hs_dev) ? iucv->hs_dev->mtu - | |
1715 | sizeof(struct af_iucv_trans_hdr) - ETH_HLEN : | |
1716 | 0x7fffffff; | |
1717 | break; | |
9d5c5d8f HB |
1718 | default: |
1719 | return -ENOPROTOOPT; | |
1720 | } | |
1721 | ||
1722 | if (put_user(len, optlen)) | |
1723 | return -EFAULT; | |
1724 | if (copy_to_user(optval, &val, len)) | |
1725 | return -EFAULT; | |
1726 | ||
1727 | return 0; | |
1728 | } | |
1729 | ||
1730 | ||
eac3731b JH |
1731 | /* Callback wrappers - called from iucv base support */ |
1732 | static int iucv_callback_connreq(struct iucv_path *path, | |
1733 | u8 ipvmid[8], u8 ipuser[16]) | |
1734 | { | |
1735 | unsigned char user_data[16]; | |
1736 | unsigned char nuser_data[16]; | |
1737 | unsigned char src_name[8]; | |
eac3731b JH |
1738 | struct sock *sk, *nsk; |
1739 | struct iucv_sock *iucv, *niucv; | |
1740 | int err; | |
1741 | ||
1742 | memcpy(src_name, ipuser, 8); | |
1743 | EBCASC(src_name, 8); | |
1744 | /* Find out if this path belongs to af_iucv. */ | |
1745 | read_lock(&iucv_sk_list.lock); | |
1746 | iucv = NULL; | |
febca281 | 1747 | sk = NULL; |
b67bfe0d | 1748 | sk_for_each(sk, &iucv_sk_list.head) |
eac3731b JH |
1749 | if (sk->sk_state == IUCV_LISTEN && |
1750 | !memcmp(&iucv_sk(sk)->src_name, src_name, 8)) { | |
1751 | /* | |
1752 | * Found a listening socket with | |
1753 | * src_name == ipuser[0-7]. | |
1754 | */ | |
1755 | iucv = iucv_sk(sk); | |
1756 | break; | |
1757 | } | |
1758 | read_unlock(&iucv_sk_list.lock); | |
1759 | if (!iucv) | |
1760 | /* No socket found, not one of our paths. */ | |
1761 | return -EINVAL; | |
1762 | ||
1763 | bh_lock_sock(sk); | |
1764 | ||
1765 | /* Check if parent socket is listening */ | |
1766 | low_nmcpy(user_data, iucv->src_name); | |
1767 | high_nmcpy(user_data, iucv->dst_name); | |
1768 | ASCEBC(user_data, sizeof(user_data)); | |
1769 | if (sk->sk_state != IUCV_LISTEN) { | |
6fcd61f7 | 1770 | err = pr_iucv->path_sever(path, user_data); |
65dbd7c2 | 1771 | iucv_path_free(path); |
eac3731b JH |
1772 | goto fail; |
1773 | } | |
1774 | ||
1775 | /* Check for backlog size */ | |
1776 | if (sk_acceptq_is_full(sk)) { | |
6fcd61f7 | 1777 | err = pr_iucv->path_sever(path, user_data); |
65dbd7c2 | 1778 | iucv_path_free(path); |
eac3731b JH |
1779 | goto fail; |
1780 | } | |
1781 | ||
1782 | /* Create the new socket */ | |
11aa9c28 | 1783 | nsk = iucv_sock_alloc(NULL, sk->sk_type, GFP_ATOMIC, 0); |
da99f056 | 1784 | if (!nsk) { |
6fcd61f7 | 1785 | err = pr_iucv->path_sever(path, user_data); |
65dbd7c2 | 1786 | iucv_path_free(path); |
eac3731b JH |
1787 | goto fail; |
1788 | } | |
1789 | ||
1790 | niucv = iucv_sk(nsk); | |
1791 | iucv_sock_init(nsk, sk); | |
fdbf6326 JW |
1792 | niucv->transport = AF_IUCV_TRANS_IUCV; |
1793 | nsk->sk_allocation |= GFP_DMA; | |
eac3731b JH |
1794 | |
1795 | /* Set the new iucv_sock */ | |
1796 | memcpy(niucv->dst_name, ipuser + 8, 8); | |
1797 | EBCASC(niucv->dst_name, 8); | |
1798 | memcpy(niucv->dst_user_id, ipvmid, 8); | |
1799 | memcpy(niucv->src_name, iucv->src_name, 8); | |
1800 | memcpy(niucv->src_user_id, iucv->src_user_id, 8); | |
1801 | niucv->path = path; | |
1802 | ||
1803 | /* Call iucv_accept */ | |
1804 | high_nmcpy(nuser_data, ipuser + 8); | |
1805 | memcpy(nuser_data + 8, niucv->src_name, 8); | |
1806 | ASCEBC(nuser_data + 8, 8); | |
1807 | ||
09488e2e HB |
1808 | /* set message limit for path based on msglimit of accepting socket */ |
1809 | niucv->msglimit = iucv->msglimit; | |
1810 | path->msglim = iucv->msglimit; | |
6fcd61f7 | 1811 | err = pr_iucv->path_accept(path, &af_iucv_handler, nuser_data, nsk); |
da99f056 | 1812 | if (err) { |
7d316b94 | 1813 | iucv_sever_path(nsk, 1); |
65dbd7c2 | 1814 | iucv_sock_kill(nsk); |
eac3731b JH |
1815 | goto fail; |
1816 | } | |
1817 | ||
1818 | iucv_accept_enqueue(sk, nsk); | |
1819 | ||
1820 | /* Wake up accept */ | |
1821 | nsk->sk_state = IUCV_CONNECTED; | |
676d2369 | 1822 | sk->sk_data_ready(sk); |
eac3731b JH |
1823 | err = 0; |
1824 | fail: | |
1825 | bh_unlock_sock(sk); | |
1826 | return 0; | |
1827 | } | |
1828 | ||
1829 | static void iucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) | |
1830 | { | |
1831 | struct sock *sk = path->private; | |
1832 | ||
1833 | sk->sk_state = IUCV_CONNECTED; | |
1834 | sk->sk_state_change(sk); | |
1835 | } | |
1836 | ||
1837 | static void iucv_callback_rx(struct iucv_path *path, struct iucv_message *msg) | |
1838 | { | |
1839 | struct sock *sk = path->private; | |
561e0360 | 1840 | struct iucv_sock *iucv = iucv_sk(sk); |
f0703c80 UB |
1841 | struct sk_buff *skb; |
1842 | struct sock_msg_q *save_msg; | |
1843 | int len; | |
561e0360 | 1844 | |
fe86e54e | 1845 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
6fcd61f7 | 1846 | pr_iucv->message_reject(path, msg); |
eac3731b | 1847 | return; |
fe86e54e | 1848 | } |
eac3731b | 1849 | |
3fa6b5ad | 1850 | spin_lock(&iucv->message_q.lock); |
eac3731b | 1851 | |
f0703c80 UB |
1852 | if (!list_empty(&iucv->message_q.list) || |
1853 | !skb_queue_empty(&iucv->backlog_skb_q)) | |
1854 | goto save_message; | |
1855 | ||
1856 | len = atomic_read(&sk->sk_rmem_alloc); | |
87fb4b7b | 1857 | len += SKB_TRUESIZE(iucv_msg_length(msg)); |
f0703c80 UB |
1858 | if (len > sk->sk_rcvbuf) |
1859 | goto save_message; | |
1860 | ||
a006353a | 1861 | skb = alloc_iucv_recv_skb(iucv_msg_length(msg)); |
f0703c80 UB |
1862 | if (!skb) |
1863 | goto save_message; | |
eac3731b | 1864 | |
f0703c80 | 1865 | iucv_process_message(sk, skb, path, msg); |
3fa6b5ad | 1866 | goto out_unlock; |
eac3731b | 1867 | |
f0703c80 UB |
1868 | save_message: |
1869 | save_msg = kzalloc(sizeof(struct sock_msg_q), GFP_ATOMIC | GFP_DMA); | |
d4444722 | 1870 | if (!save_msg) |
a56635a5 | 1871 | goto out_unlock; |
f0703c80 UB |
1872 | save_msg->path = path; |
1873 | save_msg->msg = *msg; | |
eac3731b | 1874 | |
f0703c80 | 1875 | list_add_tail(&save_msg->list, &iucv->message_q.list); |
3fa6b5ad HB |
1876 | |
1877 | out_unlock: | |
f0703c80 | 1878 | spin_unlock(&iucv->message_q.lock); |
eac3731b JH |
1879 | } |
1880 | ||
1881 | static void iucv_callback_txdone(struct iucv_path *path, | |
1882 | struct iucv_message *msg) | |
1883 | { | |
1884 | struct sock *sk = path->private; | |
f2a77991 | 1885 | struct sk_buff *this = NULL; |
eac3731b | 1886 | struct sk_buff_head *list = &iucv_sk(sk)->send_skb_q; |
9e733177 | 1887 | struct sk_buff *list_skb; |
eac3731b JH |
1888 | unsigned long flags; |
1889 | ||
7d316b94 | 1890 | bh_lock_sock(sk); |
561e0360 | 1891 | |
9e733177 DM |
1892 | spin_lock_irqsave(&list->lock, flags); |
1893 | skb_queue_walk(list, list_skb) { | |
1894 | if (msg->tag == IUCV_SKB_CB(list_skb)->tag) { | |
1895 | this = list_skb; | |
1896 | break; | |
f2a77991 | 1897 | } |
9e733177 DM |
1898 | } |
1899 | if (this) | |
1900 | __skb_unlink(this, list); | |
1901 | spin_unlock_irqrestore(&list->lock, flags); | |
eac3731b | 1902 | |
9e733177 DM |
1903 | if (this) { |
1904 | kfree_skb(this); | |
1905 | /* wake up any process waiting for sending */ | |
1906 | iucv_sock_wake_msglim(sk); | |
561e0360 | 1907 | } |
eac3731b | 1908 | |
da99f056 | 1909 | if (sk->sk_state == IUCV_CLOSING) { |
561e0360 JH |
1910 | if (skb_queue_empty(&iucv_sk(sk)->send_skb_q)) { |
1911 | sk->sk_state = IUCV_CLOSED; | |
1912 | sk->sk_state_change(sk); | |
1913 | } | |
1914 | } | |
7d316b94 | 1915 | bh_unlock_sock(sk); |
eac3731b | 1916 | |
eac3731b JH |
1917 | } |
1918 | ||
1919 | static void iucv_callback_connrej(struct iucv_path *path, u8 ipuser[16]) | |
1920 | { | |
1921 | struct sock *sk = path->private; | |
1922 | ||
7d316b94 UB |
1923 | if (sk->sk_state == IUCV_CLOSED) |
1924 | return; | |
1925 | ||
1926 | bh_lock_sock(sk); | |
1927 | iucv_sever_path(sk, 1); | |
aac6399c | 1928 | sk->sk_state = IUCV_DISCONN; |
eac3731b JH |
1929 | |
1930 | sk->sk_state_change(sk); | |
7d316b94 | 1931 | bh_unlock_sock(sk); |
eac3731b JH |
1932 | } |
1933 | ||
af88b52d HB |
1934 | /* called if the other communication side shuts down its RECV direction; |
1935 | * in turn, the callback sets SEND_SHUTDOWN to disable sending of data. | |
1936 | */ | |
1937 | static void iucv_callback_shutdown(struct iucv_path *path, u8 ipuser[16]) | |
1938 | { | |
1939 | struct sock *sk = path->private; | |
1940 | ||
1941 | bh_lock_sock(sk); | |
1942 | if (sk->sk_state != IUCV_CLOSED) { | |
1943 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
1944 | sk->sk_state_change(sk); | |
1945 | } | |
1946 | bh_unlock_sock(sk); | |
1947 | } | |
1948 | ||
3881ac44 UB |
1949 | /***************** HiperSockets transport callbacks ********************/ |
1950 | static void afiucv_swap_src_dest(struct sk_buff *skb) | |
1951 | { | |
cd11d112 | 1952 | struct af_iucv_trans_hdr *trans_hdr = iucv_trans_hdr(skb); |
3881ac44 UB |
1953 | char tmpID[8]; |
1954 | char tmpName[8]; | |
1955 | ||
1956 | ASCEBC(trans_hdr->destUserID, sizeof(trans_hdr->destUserID)); | |
1957 | ASCEBC(trans_hdr->destAppName, sizeof(trans_hdr->destAppName)); | |
1958 | ASCEBC(trans_hdr->srcUserID, sizeof(trans_hdr->srcUserID)); | |
1959 | ASCEBC(trans_hdr->srcAppName, sizeof(trans_hdr->srcAppName)); | |
1960 | memcpy(tmpID, trans_hdr->srcUserID, 8); | |
1961 | memcpy(tmpName, trans_hdr->srcAppName, 8); | |
1962 | memcpy(trans_hdr->srcUserID, trans_hdr->destUserID, 8); | |
1963 | memcpy(trans_hdr->srcAppName, trans_hdr->destAppName, 8); | |
1964 | memcpy(trans_hdr->destUserID, tmpID, 8); | |
1965 | memcpy(trans_hdr->destAppName, tmpName, 8); | |
1966 | skb_push(skb, ETH_HLEN); | |
1967 | memset(skb->data, 0, ETH_HLEN); | |
1968 | } | |
1969 | ||
1970 | /** | |
1971 | * afiucv_hs_callback_syn - react on received SYN | |
1972 | **/ | |
1973 | static int afiucv_hs_callback_syn(struct sock *sk, struct sk_buff *skb) | |
1974 | { | |
cd11d112 | 1975 | struct af_iucv_trans_hdr *trans_hdr = iucv_trans_hdr(skb); |
3881ac44 UB |
1976 | struct sock *nsk; |
1977 | struct iucv_sock *iucv, *niucv; | |
3881ac44 UB |
1978 | int err; |
1979 | ||
1980 | iucv = iucv_sk(sk); | |
3881ac44 UB |
1981 | if (!iucv) { |
1982 | /* no sock - connection refused */ | |
1983 | afiucv_swap_src_dest(skb); | |
1984 | trans_hdr->flags = AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_FIN; | |
1985 | err = dev_queue_xmit(skb); | |
1986 | goto out; | |
1987 | } | |
1988 | ||
11aa9c28 | 1989 | nsk = iucv_sock_alloc(NULL, sk->sk_type, GFP_ATOMIC, 0); |
3881ac44 UB |
1990 | bh_lock_sock(sk); |
1991 | if ((sk->sk_state != IUCV_LISTEN) || | |
1992 | sk_acceptq_is_full(sk) || | |
1993 | !nsk) { | |
1994 | /* error on server socket - connection refused */ | |
3881ac44 UB |
1995 | afiucv_swap_src_dest(skb); |
1996 | trans_hdr->flags = AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_FIN; | |
1997 | err = dev_queue_xmit(skb); | |
4d520f62 | 1998 | iucv_sock_kill(nsk); |
3881ac44 UB |
1999 | bh_unlock_sock(sk); |
2000 | goto out; | |
2001 | } | |
2002 | ||
2003 | niucv = iucv_sk(nsk); | |
2004 | iucv_sock_init(nsk, sk); | |
2005 | niucv->transport = AF_IUCV_TRANS_HIPER; | |
2006 | niucv->msglimit = iucv->msglimit; | |
2007 | if (!trans_hdr->window) | |
2008 | niucv->msglimit_peer = IUCV_HIPER_MSGLIM_DEFAULT; | |
2009 | else | |
2010 | niucv->msglimit_peer = trans_hdr->window; | |
2011 | memcpy(niucv->dst_name, trans_hdr->srcAppName, 8); | |
2012 | memcpy(niucv->dst_user_id, trans_hdr->srcUserID, 8); | |
2013 | memcpy(niucv->src_name, iucv->src_name, 8); | |
2014 | memcpy(niucv->src_user_id, iucv->src_user_id, 8); | |
2015 | nsk->sk_bound_dev_if = sk->sk_bound_dev_if; | |
800c5eb7 UB |
2016 | niucv->hs_dev = iucv->hs_dev; |
2017 | dev_hold(niucv->hs_dev); | |
3881ac44 UB |
2018 | afiucv_swap_src_dest(skb); |
2019 | trans_hdr->flags = AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_ACK; | |
2020 | trans_hdr->window = niucv->msglimit; | |
2021 | /* if receiver acks the xmit connection is established */ | |
2022 | err = dev_queue_xmit(skb); | |
2023 | if (!err) { | |
2024 | iucv_accept_enqueue(sk, nsk); | |
2025 | nsk->sk_state = IUCV_CONNECTED; | |
676d2369 | 2026 | sk->sk_data_ready(sk); |
3881ac44 UB |
2027 | } else |
2028 | iucv_sock_kill(nsk); | |
2029 | bh_unlock_sock(sk); | |
2030 | ||
2031 | out: | |
2032 | return NET_RX_SUCCESS; | |
2033 | } | |
2034 | ||
2035 | /** | |
2036 | * afiucv_hs_callback_synack() - react on received SYN-ACK | |
2037 | **/ | |
2038 | static int afiucv_hs_callback_synack(struct sock *sk, struct sk_buff *skb) | |
2039 | { | |
2040 | struct iucv_sock *iucv = iucv_sk(sk); | |
3881ac44 UB |
2041 | |
2042 | if (!iucv) | |
2043 | goto out; | |
2044 | if (sk->sk_state != IUCV_BOUND) | |
2045 | goto out; | |
2046 | bh_lock_sock(sk); | |
cd11d112 | 2047 | iucv->msglimit_peer = iucv_trans_hdr(skb)->window; |
3881ac44 UB |
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); | |
3881ac44 UB |
2103 | |
2104 | if (!iucv) | |
2105 | return NET_RX_SUCCESS; | |
2106 | ||
2107 | if (sk->sk_state != IUCV_CONNECTED) | |
2108 | return NET_RX_SUCCESS; | |
2109 | ||
cd11d112 | 2110 | atomic_sub(iucv_trans_hdr(skb)->window, &iucv->msg_sent); |
3881ac44 UB |
2111 | iucv_sock_wake_msglim(sk); |
2112 | return NET_RX_SUCCESS; | |
2113 | } | |
2114 | ||
2115 | /** | |
2116 | * afiucv_hs_callback_rx() - react on received data | |
2117 | **/ | |
2118 | static int afiucv_hs_callback_rx(struct sock *sk, struct sk_buff *skb) | |
2119 | { | |
2120 | struct iucv_sock *iucv = iucv_sk(sk); | |
2121 | ||
2122 | if (!iucv) { | |
2123 | kfree_skb(skb); | |
2124 | return NET_RX_SUCCESS; | |
2125 | } | |
2126 | ||
2127 | if (sk->sk_state != IUCV_CONNECTED) { | |
2128 | kfree_skb(skb); | |
2129 | return NET_RX_SUCCESS; | |
2130 | } | |
2131 | ||
82492a35 UB |
2132 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
2133 | kfree_skb(skb); | |
2134 | return NET_RX_SUCCESS; | |
2135 | } | |
2136 | ||
979f66b3 | 2137 | /* write stuff from iucv_msg to skb cb */ |
3881ac44 UB |
2138 | skb_pull(skb, sizeof(struct af_iucv_trans_hdr)); |
2139 | skb_reset_transport_header(skb); | |
2140 | skb_reset_network_header(skb); | |
f9c41a62 | 2141 | IUCV_SKB_CB(skb)->offset = 0; |
8c68b1a0 UB |
2142 | if (sk_filter(sk, skb)) { |
2143 | atomic_inc(&sk->sk_drops); /* skb rejected by filter */ | |
2144 | kfree_skb(skb); | |
2145 | return NET_RX_SUCCESS; | |
2146 | } | |
2147 | ||
3881ac44 UB |
2148 | spin_lock(&iucv->message_q.lock); |
2149 | if (skb_queue_empty(&iucv->backlog_skb_q)) { | |
8c68b1a0 | 2150 | if (__sock_queue_rcv_skb(sk, skb)) |
3881ac44 UB |
2151 | /* handle rcv queue full */ |
2152 | skb_queue_tail(&iucv->backlog_skb_q, skb); | |
3881ac44 UB |
2153 | } else |
2154 | skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, skb); | |
2155 | spin_unlock(&iucv->message_q.lock); | |
2156 | return NET_RX_SUCCESS; | |
2157 | } | |
2158 | ||
2159 | /** | |
2160 | * afiucv_hs_rcv() - base function for arriving data through HiperSockets | |
2161 | * transport | |
2162 | * called from netif RX softirq | |
2163 | **/ | |
2164 | static int afiucv_hs_rcv(struct sk_buff *skb, struct net_device *dev, | |
2165 | struct packet_type *pt, struct net_device *orig_dev) | |
2166 | { | |
3881ac44 UB |
2167 | struct sock *sk; |
2168 | struct iucv_sock *iucv; | |
2169 | struct af_iucv_trans_hdr *trans_hdr; | |
22244099 | 2170 | int err = NET_RX_SUCCESS; |
3881ac44 | 2171 | char nullstring[8]; |
3881ac44 | 2172 | |
cd11d112 JW |
2173 | if (!pskb_may_pull(skb, sizeof(*trans_hdr))) { |
2174 | WARN_ONCE(1, "AF_IUCV failed to receive skb, len=%u", skb->len); | |
979f66b3 EC |
2175 | kfree_skb(skb); |
2176 | return NET_RX_SUCCESS; | |
2177 | } | |
cd11d112 JW |
2178 | |
2179 | trans_hdr = iucv_trans_hdr(skb); | |
3881ac44 UB |
2180 | EBCASC(trans_hdr->destAppName, sizeof(trans_hdr->destAppName)); |
2181 | EBCASC(trans_hdr->destUserID, sizeof(trans_hdr->destUserID)); | |
2182 | EBCASC(trans_hdr->srcAppName, sizeof(trans_hdr->srcAppName)); | |
2183 | EBCASC(trans_hdr->srcUserID, sizeof(trans_hdr->srcUserID)); | |
2184 | memset(nullstring, 0, sizeof(nullstring)); | |
2185 | iucv = NULL; | |
2186 | sk = NULL; | |
2187 | read_lock(&iucv_sk_list.lock); | |
b67bfe0d | 2188 | sk_for_each(sk, &iucv_sk_list.head) { |
3881ac44 UB |
2189 | if (trans_hdr->flags == AF_IUCV_FLAG_SYN) { |
2190 | if ((!memcmp(&iucv_sk(sk)->src_name, | |
2191 | trans_hdr->destAppName, 8)) && | |
2192 | (!memcmp(&iucv_sk(sk)->src_user_id, | |
2193 | trans_hdr->destUserID, 8)) && | |
2194 | (!memcmp(&iucv_sk(sk)->dst_name, nullstring, 8)) && | |
2195 | (!memcmp(&iucv_sk(sk)->dst_user_id, | |
2196 | nullstring, 8))) { | |
2197 | iucv = iucv_sk(sk); | |
2198 | break; | |
2199 | } | |
2200 | } else { | |
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, | |
2206 | trans_hdr->srcAppName, 8)) && | |
2207 | (!memcmp(&iucv_sk(sk)->dst_user_id, | |
2208 | trans_hdr->srcUserID, 8))) { | |
2209 | iucv = iucv_sk(sk); | |
2210 | break; | |
2211 | } | |
2212 | } | |
2213 | } | |
2214 | read_unlock(&iucv_sk_list.lock); | |
2215 | if (!iucv) | |
2216 | sk = NULL; | |
2217 | ||
2218 | /* no sock | |
2219 | how should we send with no sock | |
2220 | 1) send without sock no send rc checking? | |
2221 | 2) introduce default sock to handle this cases | |
2222 | ||
2223 | SYN -> send SYN|ACK in good case, send SYN|FIN in bad case | |
2224 | data -> send FIN | |
2225 | SYN|ACK, SYN|FIN, FIN -> no action? */ | |
2226 | ||
2227 | switch (trans_hdr->flags) { | |
2228 | case AF_IUCV_FLAG_SYN: | |
2229 | /* connect request */ | |
2230 | err = afiucv_hs_callback_syn(sk, skb); | |
2231 | break; | |
2232 | case (AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_ACK): | |
2233 | /* connect request confirmed */ | |
2234 | err = afiucv_hs_callback_synack(sk, skb); | |
2235 | break; | |
2236 | case (AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_FIN): | |
2237 | /* connect request refused */ | |
2238 | err = afiucv_hs_callback_synfin(sk, skb); | |
2239 | break; | |
2240 | case (AF_IUCV_FLAG_FIN): | |
2241 | /* close request */ | |
2242 | err = afiucv_hs_callback_fin(sk, skb); | |
2243 | break; | |
2244 | case (AF_IUCV_FLAG_WIN): | |
2245 | err = afiucv_hs_callback_win(sk, skb); | |
800c5eb7 UB |
2246 | if (skb->len == sizeof(struct af_iucv_trans_hdr)) { |
2247 | kfree_skb(skb); | |
2248 | break; | |
2249 | } | |
82492a35 UB |
2250 | /* fall through and receive non-zero length data */ |
2251 | case (AF_IUCV_FLAG_SHT): | |
2252 | /* shutdown request */ | |
2253 | /* fall through and receive zero length data */ | |
3881ac44 UB |
2254 | case 0: |
2255 | /* plain data frame */ | |
f9c41a62 | 2256 | IUCV_SKB_CB(skb)->class = trans_hdr->iucv_hdr.class; |
3881ac44 UB |
2257 | err = afiucv_hs_callback_rx(sk, skb); |
2258 | break; | |
2259 | default: | |
22244099 | 2260 | kfree_skb(skb); |
3881ac44 UB |
2261 | } |
2262 | ||
2263 | return err; | |
2264 | } | |
2265 | ||
2266 | /** | |
2267 | * afiucv_hs_callback_txnotify() - handle send notifcations from HiperSockets | |
2268 | * transport | |
2269 | **/ | |
2270 | static void afiucv_hs_callback_txnotify(struct sk_buff *skb, | |
2271 | enum iucv_tx_notify n) | |
2272 | { | |
2273 | struct sock *isk = skb->sk; | |
2274 | struct sock *sk = NULL; | |
2275 | struct iucv_sock *iucv = NULL; | |
2276 | struct sk_buff_head *list; | |
2277 | struct sk_buff *list_skb; | |
800c5eb7 | 2278 | struct sk_buff *nskb; |
3881ac44 | 2279 | unsigned long flags; |
3881ac44 | 2280 | |
800c5eb7 | 2281 | read_lock_irqsave(&iucv_sk_list.lock, flags); |
b67bfe0d | 2282 | sk_for_each(sk, &iucv_sk_list.head) |
3881ac44 UB |
2283 | if (sk == isk) { |
2284 | iucv = iucv_sk(sk); | |
2285 | break; | |
2286 | } | |
800c5eb7 | 2287 | read_unlock_irqrestore(&iucv_sk_list.lock, flags); |
3881ac44 | 2288 | |
800c5eb7 | 2289 | if (!iucv || sock_flag(sk, SOCK_ZAPPED)) |
3881ac44 UB |
2290 | return; |
2291 | ||
3881ac44 | 2292 | list = &iucv->send_skb_q; |
800c5eb7 | 2293 | spin_lock_irqsave(&list->lock, flags); |
9e733177 | 2294 | skb_queue_walk_safe(list, list_skb, nskb) { |
3881ac44 | 2295 | if (skb_shinfo(list_skb) == skb_shinfo(skb)) { |
3881ac44 UB |
2296 | switch (n) { |
2297 | case TX_NOTIFY_OK: | |
800c5eb7 UB |
2298 | __skb_unlink(list_skb, list); |
2299 | kfree_skb(list_skb); | |
3881ac44 | 2300 | iucv_sock_wake_msglim(sk); |
3881ac44 UB |
2301 | break; |
2302 | case TX_NOTIFY_PENDING: | |
2303 | atomic_inc(&iucv->pendings); | |
2304 | break; | |
2305 | case TX_NOTIFY_DELAYED_OK: | |
800c5eb7 | 2306 | __skb_unlink(list_skb, list); |
3881ac44 UB |
2307 | atomic_dec(&iucv->pendings); |
2308 | if (atomic_read(&iucv->pendings) <= 0) | |
2309 | iucv_sock_wake_msglim(sk); | |
800c5eb7 | 2310 | kfree_skb(list_skb); |
3881ac44 UB |
2311 | break; |
2312 | case TX_NOTIFY_UNREACHABLE: | |
2313 | case TX_NOTIFY_DELAYED_UNREACHABLE: | |
2314 | case TX_NOTIFY_TPQFULL: /* not yet used */ | |
2315 | case TX_NOTIFY_GENERALERROR: | |
2316 | case TX_NOTIFY_DELAYED_GENERALERROR: | |
800c5eb7 UB |
2317 | __skb_unlink(list_skb, list); |
2318 | kfree_skb(list_skb); | |
2319 | if (sk->sk_state == IUCV_CONNECTED) { | |
2320 | sk->sk_state = IUCV_DISCONN; | |
2321 | sk->sk_state_change(sk); | |
2322 | } | |
3881ac44 UB |
2323 | break; |
2324 | } | |
2325 | break; | |
2326 | } | |
3881ac44 UB |
2327 | } |
2328 | spin_unlock_irqrestore(&list->lock, flags); | |
2329 | ||
42bd48e0 UB |
2330 | if (sk->sk_state == IUCV_CLOSING) { |
2331 | if (skb_queue_empty(&iucv_sk(sk)->send_skb_q)) { | |
2332 | sk->sk_state = IUCV_CLOSED; | |
2333 | sk->sk_state_change(sk); | |
2334 | } | |
2335 | } | |
2336 | ||
3881ac44 | 2337 | } |
9fbd87d4 UB |
2338 | |
2339 | /* | |
2340 | * afiucv_netdev_event: handle netdev notifier chain events | |
2341 | */ | |
2342 | static int afiucv_netdev_event(struct notifier_block *this, | |
2343 | unsigned long event, void *ptr) | |
2344 | { | |
351638e7 | 2345 | struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); |
9fbd87d4 UB |
2346 | struct sock *sk; |
2347 | struct iucv_sock *iucv; | |
2348 | ||
2349 | switch (event) { | |
2350 | case NETDEV_REBOOT: | |
2351 | case NETDEV_GOING_DOWN: | |
b67bfe0d | 2352 | sk_for_each(sk, &iucv_sk_list.head) { |
9fbd87d4 UB |
2353 | iucv = iucv_sk(sk); |
2354 | if ((iucv->hs_dev == event_dev) && | |
2355 | (sk->sk_state == IUCV_CONNECTED)) { | |
2356 | if (event == NETDEV_GOING_DOWN) | |
2357 | iucv_send_ctrl(sk, AF_IUCV_FLAG_FIN); | |
2358 | sk->sk_state = IUCV_DISCONN; | |
2359 | sk->sk_state_change(sk); | |
2360 | } | |
2361 | } | |
2362 | break; | |
2363 | case NETDEV_DOWN: | |
2364 | case NETDEV_UNREGISTER: | |
2365 | default: | |
2366 | break; | |
2367 | } | |
2368 | return NOTIFY_DONE; | |
2369 | } | |
2370 | ||
2371 | static struct notifier_block afiucv_netdev_notifier = { | |
2372 | .notifier_call = afiucv_netdev_event, | |
2373 | }; | |
2374 | ||
5708e868 | 2375 | static const struct proto_ops iucv_sock_ops = { |
eac3731b JH |
2376 | .family = PF_IUCV, |
2377 | .owner = THIS_MODULE, | |
2378 | .release = iucv_sock_release, | |
2379 | .bind = iucv_sock_bind, | |
2380 | .connect = iucv_sock_connect, | |
2381 | .listen = iucv_sock_listen, | |
2382 | .accept = iucv_sock_accept, | |
2383 | .getname = iucv_sock_getname, | |
2384 | .sendmsg = iucv_sock_sendmsg, | |
2385 | .recvmsg = iucv_sock_recvmsg, | |
a11e1d43 | 2386 | .poll = iucv_sock_poll, |
eac3731b JH |
2387 | .ioctl = sock_no_ioctl, |
2388 | .mmap = sock_no_mmap, | |
2389 | .socketpair = sock_no_socketpair, | |
2390 | .shutdown = iucv_sock_shutdown, | |
9d5c5d8f HB |
2391 | .setsockopt = iucv_sock_setsockopt, |
2392 | .getsockopt = iucv_sock_getsockopt, | |
eac3731b JH |
2393 | }; |
2394 | ||
ec1b4cf7 | 2395 | static const struct net_proto_family iucv_sock_family_ops = { |
eac3731b JH |
2396 | .family = AF_IUCV, |
2397 | .owner = THIS_MODULE, | |
2398 | .create = iucv_sock_create, | |
2399 | }; | |
2400 | ||
3881ac44 UB |
2401 | static struct packet_type iucv_packet_type = { |
2402 | .type = cpu_to_be16(ETH_P_AF_IUCV), | |
2403 | .func = afiucv_hs_rcv, | |
2404 | }; | |
2405 | ||
2406 | static int afiucv_iucv_init(void) | |
6fcd61f7 FB |
2407 | { |
2408 | int err; | |
2409 | ||
2410 | err = pr_iucv->iucv_register(&af_iucv_handler, 0); | |
2411 | if (err) | |
2412 | goto out; | |
2413 | /* establish dummy device */ | |
2414 | af_iucv_driver.bus = pr_iucv->bus; | |
2415 | err = driver_register(&af_iucv_driver); | |
2416 | if (err) | |
2417 | goto out_iucv; | |
2418 | af_iucv_dev = kzalloc(sizeof(struct device), GFP_KERNEL); | |
2419 | if (!af_iucv_dev) { | |
2420 | err = -ENOMEM; | |
2421 | goto out_driver; | |
2422 | } | |
2423 | dev_set_name(af_iucv_dev, "af_iucv"); | |
2424 | af_iucv_dev->bus = pr_iucv->bus; | |
2425 | af_iucv_dev->parent = pr_iucv->root; | |
2426 | af_iucv_dev->release = (void (*)(struct device *))kfree; | |
2427 | af_iucv_dev->driver = &af_iucv_driver; | |
2428 | err = device_register(af_iucv_dev); | |
2429 | if (err) | |
fa6a91e9 | 2430 | goto out_iucv_dev; |
6fcd61f7 FB |
2431 | return 0; |
2432 | ||
fa6a91e9 AY |
2433 | out_iucv_dev: |
2434 | put_device(af_iucv_dev); | |
6fcd61f7 FB |
2435 | out_driver: |
2436 | driver_unregister(&af_iucv_driver); | |
2437 | out_iucv: | |
2438 | pr_iucv->iucv_unregister(&af_iucv_handler, 0); | |
2439 | out: | |
2440 | return err; | |
2441 | } | |
2442 | ||
06996c1d JW |
2443 | static void afiucv_iucv_exit(void) |
2444 | { | |
2445 | device_unregister(af_iucv_dev); | |
2446 | driver_unregister(&af_iucv_driver); | |
2447 | pr_iucv->iucv_unregister(&af_iucv_handler, 0); | |
2448 | } | |
2449 | ||
da99f056 | 2450 | static int __init afiucv_init(void) |
eac3731b JH |
2451 | { |
2452 | int err; | |
2453 | ||
3881ac44 UB |
2454 | if (MACHINE_IS_VM) { |
2455 | cpcmd("QUERY USERID", iucv_userid, sizeof(iucv_userid), &err); | |
2456 | if (unlikely(err)) { | |
2457 | WARN_ON(err); | |
2458 | err = -EPROTONOSUPPORT; | |
2459 | goto out; | |
2460 | } | |
eac3731b | 2461 | |
3881ac44 UB |
2462 | pr_iucv = try_then_request_module(symbol_get(iucv_if), "iucv"); |
2463 | if (!pr_iucv) { | |
2464 | printk(KERN_WARNING "iucv_if lookup failed\n"); | |
2465 | memset(&iucv_userid, 0, sizeof(iucv_userid)); | |
2466 | } | |
2467 | } else { | |
2468 | memset(&iucv_userid, 0, sizeof(iucv_userid)); | |
2469 | pr_iucv = NULL; | |
6fcd61f7 FB |
2470 | } |
2471 | ||
eac3731b JH |
2472 | err = proto_register(&iucv_proto, 0); |
2473 | if (err) | |
6fcd61f7 | 2474 | goto out; |
eac3731b JH |
2475 | err = sock_register(&iucv_sock_family_ops); |
2476 | if (err) | |
2477 | goto out_proto; | |
6fcd61f7 | 2478 | |
3881ac44 UB |
2479 | if (pr_iucv) { |
2480 | err = afiucv_iucv_init(); | |
2481 | if (err) | |
2482 | goto out_sock; | |
06996c1d JW |
2483 | } |
2484 | ||
2485 | err = register_netdevice_notifier(&afiucv_netdev_notifier); | |
2486 | if (err) | |
2487 | goto out_notifier; | |
2488 | ||
3881ac44 | 2489 | dev_add_pack(&iucv_packet_type); |
eac3731b JH |
2490 | return 0; |
2491 | ||
06996c1d JW |
2492 | out_notifier: |
2493 | if (pr_iucv) | |
2494 | afiucv_iucv_exit(); | |
c23cad92 UB |
2495 | out_sock: |
2496 | sock_unregister(PF_IUCV); | |
eac3731b JH |
2497 | out_proto: |
2498 | proto_unregister(&iucv_proto); | |
eac3731b | 2499 | out: |
6fcd61f7 FB |
2500 | if (pr_iucv) |
2501 | symbol_put(iucv_if); | |
eac3731b JH |
2502 | return err; |
2503 | } | |
2504 | ||
2505 | static void __exit afiucv_exit(void) | |
2506 | { | |
3881ac44 | 2507 | if (pr_iucv) { |
06996c1d | 2508 | afiucv_iucv_exit(); |
3881ac44 | 2509 | symbol_put(iucv_if); |
06996c1d JW |
2510 | } |
2511 | ||
2512 | unregister_netdevice_notifier(&afiucv_netdev_notifier); | |
3881ac44 | 2513 | dev_remove_pack(&iucv_packet_type); |
eac3731b JH |
2514 | sock_unregister(PF_IUCV); |
2515 | proto_unregister(&iucv_proto); | |
eac3731b JH |
2516 | } |
2517 | ||
2518 | module_init(afiucv_init); | |
2519 | module_exit(afiucv_exit); | |
2520 | ||
2521 | MODULE_AUTHOR("Jennifer Hunt <jenhunt@us.ibm.com>"); | |
2522 | MODULE_DESCRIPTION("IUCV Sockets ver " VERSION); | |
2523 | MODULE_VERSION(VERSION); | |
2524 | MODULE_LICENSE("GPL"); | |
2525 | MODULE_ALIAS_NETPROTO(PF_IUCV); |