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Commit | Line | Data |
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7c657876 ACM |
1 | /* |
2 | * net/dccp/proto.c | |
3 | * | |
4 | * An implementation of the DCCP protocol | |
5 | * Arnaldo Carvalho de Melo <acme@conectiva.com.br> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #include <linux/config.h> | |
13 | #include <linux/dccp.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/sched.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/netdevice.h> | |
20 | #include <linux/in.h> | |
21 | #include <linux/if_arp.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/random.h> | |
24 | #include <net/checksum.h> | |
25 | ||
14c85021 | 26 | #include <net/inet_sock.h> |
7c657876 ACM |
27 | #include <net/sock.h> |
28 | #include <net/xfrm.h> | |
29 | ||
30 | #include <asm/semaphore.h> | |
31 | #include <linux/spinlock.h> | |
32 | #include <linux/timer.h> | |
33 | #include <linux/delay.h> | |
34 | #include <linux/poll.h> | |
7c657876 ACM |
35 | |
36 | #include "ccid.h" | |
37 | #include "dccp.h" | |
afe00251 | 38 | #include "feat.h" |
7c657876 | 39 | |
ba89966c | 40 | DEFINE_SNMP_STAT(struct dccp_mib, dccp_statistics) __read_mostly; |
7c657876 | 41 | |
f21e68ca ACM |
42 | EXPORT_SYMBOL_GPL(dccp_statistics); |
43 | ||
7c657876 ACM |
44 | atomic_t dccp_orphan_count = ATOMIC_INIT(0); |
45 | ||
f21e68ca ACM |
46 | EXPORT_SYMBOL_GPL(dccp_orphan_count); |
47 | ||
075ae866 ACM |
48 | struct inet_hashinfo __cacheline_aligned dccp_hashinfo = { |
49 | .lhash_lock = RW_LOCK_UNLOCKED, | |
50 | .lhash_users = ATOMIC_INIT(0), | |
51 | .lhash_wait = __WAIT_QUEUE_HEAD_INITIALIZER(dccp_hashinfo.lhash_wait), | |
52 | }; | |
53 | ||
54 | EXPORT_SYMBOL_GPL(dccp_hashinfo); | |
55 | ||
c25a18ba ACM |
56 | void dccp_set_state(struct sock *sk, const int state) |
57 | { | |
58 | const int oldstate = sk->sk_state; | |
59 | ||
60 | dccp_pr_debug("%s(%p) %-10.10s -> %s\n", | |
61 | dccp_role(sk), sk, | |
62 | dccp_state_name(oldstate), dccp_state_name(state)); | |
63 | WARN_ON(state == oldstate); | |
64 | ||
65 | switch (state) { | |
66 | case DCCP_OPEN: | |
67 | if (oldstate != DCCP_OPEN) | |
68 | DCCP_INC_STATS(DCCP_MIB_CURRESTAB); | |
69 | break; | |
70 | ||
71 | case DCCP_CLOSED: | |
72 | if (oldstate == DCCP_CLOSING || oldstate == DCCP_OPEN) | |
73 | DCCP_INC_STATS(DCCP_MIB_ESTABRESETS); | |
74 | ||
75 | sk->sk_prot->unhash(sk); | |
76 | if (inet_csk(sk)->icsk_bind_hash != NULL && | |
77 | !(sk->sk_userlocks & SOCK_BINDPORT_LOCK)) | |
78 | inet_put_port(&dccp_hashinfo, sk); | |
79 | /* fall through */ | |
80 | default: | |
81 | if (oldstate == DCCP_OPEN) | |
82 | DCCP_DEC_STATS(DCCP_MIB_CURRESTAB); | |
83 | } | |
84 | ||
85 | /* Change state AFTER socket is unhashed to avoid closed | |
86 | * socket sitting in hash tables. | |
87 | */ | |
88 | sk->sk_state = state; | |
89 | } | |
90 | ||
91 | EXPORT_SYMBOL_GPL(dccp_set_state); | |
92 | ||
93 | void dccp_done(struct sock *sk) | |
94 | { | |
95 | dccp_set_state(sk, DCCP_CLOSED); | |
96 | dccp_clear_xmit_timers(sk); | |
97 | ||
98 | sk->sk_shutdown = SHUTDOWN_MASK; | |
99 | ||
100 | if (!sock_flag(sk, SOCK_DEAD)) | |
101 | sk->sk_state_change(sk); | |
102 | else | |
103 | inet_csk_destroy_sock(sk); | |
104 | } | |
105 | ||
106 | EXPORT_SYMBOL_GPL(dccp_done); | |
107 | ||
7c657876 ACM |
108 | const char *dccp_packet_name(const int type) |
109 | { | |
110 | static const char *dccp_packet_names[] = { | |
111 | [DCCP_PKT_REQUEST] = "REQUEST", | |
112 | [DCCP_PKT_RESPONSE] = "RESPONSE", | |
113 | [DCCP_PKT_DATA] = "DATA", | |
114 | [DCCP_PKT_ACK] = "ACK", | |
115 | [DCCP_PKT_DATAACK] = "DATAACK", | |
116 | [DCCP_PKT_CLOSEREQ] = "CLOSEREQ", | |
117 | [DCCP_PKT_CLOSE] = "CLOSE", | |
118 | [DCCP_PKT_RESET] = "RESET", | |
119 | [DCCP_PKT_SYNC] = "SYNC", | |
120 | [DCCP_PKT_SYNCACK] = "SYNCACK", | |
121 | }; | |
122 | ||
123 | if (type >= DCCP_NR_PKT_TYPES) | |
124 | return "INVALID"; | |
125 | else | |
126 | return dccp_packet_names[type]; | |
127 | } | |
128 | ||
129 | EXPORT_SYMBOL_GPL(dccp_packet_name); | |
130 | ||
131 | const char *dccp_state_name(const int state) | |
132 | { | |
133 | static char *dccp_state_names[] = { | |
134 | [DCCP_OPEN] = "OPEN", | |
135 | [DCCP_REQUESTING] = "REQUESTING", | |
136 | [DCCP_PARTOPEN] = "PARTOPEN", | |
137 | [DCCP_LISTEN] = "LISTEN", | |
138 | [DCCP_RESPOND] = "RESPOND", | |
139 | [DCCP_CLOSING] = "CLOSING", | |
140 | [DCCP_TIME_WAIT] = "TIME_WAIT", | |
141 | [DCCP_CLOSED] = "CLOSED", | |
142 | }; | |
143 | ||
144 | if (state >= DCCP_MAX_STATES) | |
145 | return "INVALID STATE!"; | |
146 | else | |
147 | return dccp_state_names[state]; | |
148 | } | |
149 | ||
150 | EXPORT_SYMBOL_GPL(dccp_state_name); | |
151 | ||
c985ed70 ACM |
152 | void dccp_hash(struct sock *sk) |
153 | { | |
154 | inet_hash(&dccp_hashinfo, sk); | |
155 | } | |
156 | ||
157 | EXPORT_SYMBOL_GPL(dccp_hash); | |
158 | ||
159 | void dccp_unhash(struct sock *sk) | |
160 | { | |
161 | inet_unhash(&dccp_hashinfo, sk); | |
162 | } | |
163 | ||
164 | EXPORT_SYMBOL_GPL(dccp_unhash); | |
165 | ||
72478873 | 166 | int dccp_init_sock(struct sock *sk, const __u8 ctl_sock_initialized) |
3e0fadc5 ACM |
167 | { |
168 | struct dccp_sock *dp = dccp_sk(sk); | |
169 | struct inet_connection_sock *icsk = inet_csk(sk); | |
3e0fadc5 ACM |
170 | |
171 | dccp_options_init(&dp->dccps_options); | |
172 | do_gettimeofday(&dp->dccps_epoch); | |
173 | ||
174 | /* | |
175 | * FIXME: We're hardcoding the CCID, and doing this at this point makes | |
176 | * the listening (master) sock get CCID control blocks, which is not | |
177 | * necessary, but for now, to not mess with the test userspace apps, | |
178 | * lets leave it here, later the real solution is to do this in a | |
179 | * setsockopt(CCIDs-I-want/accept). -acme | |
180 | */ | |
72478873 | 181 | if (likely(ctl_sock_initialized)) { |
3e0fadc5 ACM |
182 | int rc = dccp_feat_init(sk); |
183 | ||
184 | if (rc) | |
185 | return rc; | |
186 | ||
187 | if (dp->dccps_options.dccpo_send_ack_vector) { | |
188 | dp->dccps_hc_rx_ackvec = dccp_ackvec_alloc(GFP_KERNEL); | |
189 | if (dp->dccps_hc_rx_ackvec == NULL) | |
190 | return -ENOMEM; | |
191 | } | |
192 | dp->dccps_hc_rx_ccid = | |
193 | ccid_hc_rx_new(dp->dccps_options.dccpo_rx_ccid, | |
194 | sk, GFP_KERNEL); | |
195 | dp->dccps_hc_tx_ccid = | |
196 | ccid_hc_tx_new(dp->dccps_options.dccpo_tx_ccid, | |
197 | sk, GFP_KERNEL); | |
198 | if (unlikely(dp->dccps_hc_rx_ccid == NULL || | |
199 | dp->dccps_hc_tx_ccid == NULL)) { | |
200 | ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk); | |
201 | ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk); | |
202 | if (dp->dccps_options.dccpo_send_ack_vector) { | |
203 | dccp_ackvec_free(dp->dccps_hc_rx_ackvec); | |
204 | dp->dccps_hc_rx_ackvec = NULL; | |
205 | } | |
206 | dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL; | |
207 | return -ENOMEM; | |
208 | } | |
209 | } else { | |
210 | /* control socket doesn't need feat nego */ | |
211 | INIT_LIST_HEAD(&dp->dccps_options.dccpo_pending); | |
212 | INIT_LIST_HEAD(&dp->dccps_options.dccpo_conf); | |
3e0fadc5 ACM |
213 | } |
214 | ||
215 | dccp_init_xmit_timers(sk); | |
216 | icsk->icsk_rto = DCCP_TIMEOUT_INIT; | |
217 | sk->sk_state = DCCP_CLOSED; | |
218 | sk->sk_write_space = dccp_write_space; | |
219 | icsk->icsk_sync_mss = dccp_sync_mss; | |
220 | dp->dccps_mss_cache = 536; | |
221 | dp->dccps_role = DCCP_ROLE_UNDEFINED; | |
222 | dp->dccps_service = DCCP_SERVICE_INVALID_VALUE; | |
223 | dp->dccps_l_ack_ratio = dp->dccps_r_ack_ratio = 1; | |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
228 | EXPORT_SYMBOL_GPL(dccp_init_sock); | |
229 | ||
230 | int dccp_destroy_sock(struct sock *sk) | |
231 | { | |
232 | struct dccp_sock *dp = dccp_sk(sk); | |
233 | ||
234 | /* | |
235 | * DCCP doesn't use sk_write_queue, just sk_send_head | |
236 | * for retransmissions | |
237 | */ | |
238 | if (sk->sk_send_head != NULL) { | |
239 | kfree_skb(sk->sk_send_head); | |
240 | sk->sk_send_head = NULL; | |
241 | } | |
242 | ||
243 | /* Clean up a referenced DCCP bind bucket. */ | |
244 | if (inet_csk(sk)->icsk_bind_hash != NULL) | |
245 | inet_put_port(&dccp_hashinfo, sk); | |
246 | ||
247 | kfree(dp->dccps_service_list); | |
248 | dp->dccps_service_list = NULL; | |
249 | ||
250 | if (dp->dccps_options.dccpo_send_ack_vector) { | |
251 | dccp_ackvec_free(dp->dccps_hc_rx_ackvec); | |
252 | dp->dccps_hc_rx_ackvec = NULL; | |
253 | } | |
254 | ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk); | |
255 | ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk); | |
256 | dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL; | |
257 | ||
258 | /* clean up feature negotiation state */ | |
259 | dccp_feat_clean(sk); | |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
264 | EXPORT_SYMBOL_GPL(dccp_destroy_sock); | |
265 | ||
7c657876 ACM |
266 | static inline int dccp_listen_start(struct sock *sk) |
267 | { | |
67e6b629 ACM |
268 | struct dccp_sock *dp = dccp_sk(sk); |
269 | ||
270 | dp->dccps_role = DCCP_ROLE_LISTEN; | |
271 | /* | |
272 | * Apps need to use setsockopt(DCCP_SOCKOPT_SERVICE) | |
273 | * before calling listen() | |
274 | */ | |
275 | if (dccp_service_not_initialized(sk)) | |
276 | return -EPROTO; | |
7c657876 ACM |
277 | return inet_csk_listen_start(sk, TCP_SYNQ_HSIZE); |
278 | } | |
279 | ||
280 | int dccp_disconnect(struct sock *sk, int flags) | |
281 | { | |
282 | struct inet_connection_sock *icsk = inet_csk(sk); | |
283 | struct inet_sock *inet = inet_sk(sk); | |
284 | int err = 0; | |
285 | const int old_state = sk->sk_state; | |
286 | ||
287 | if (old_state != DCCP_CLOSED) | |
288 | dccp_set_state(sk, DCCP_CLOSED); | |
289 | ||
290 | /* ABORT function of RFC793 */ | |
291 | if (old_state == DCCP_LISTEN) { | |
292 | inet_csk_listen_stop(sk); | |
293 | /* FIXME: do the active reset thing */ | |
294 | } else if (old_state == DCCP_REQUESTING) | |
295 | sk->sk_err = ECONNRESET; | |
296 | ||
297 | dccp_clear_xmit_timers(sk); | |
298 | __skb_queue_purge(&sk->sk_receive_queue); | |
299 | if (sk->sk_send_head != NULL) { | |
300 | __kfree_skb(sk->sk_send_head); | |
301 | sk->sk_send_head = NULL; | |
302 | } | |
303 | ||
304 | inet->dport = 0; | |
305 | ||
306 | if (!(sk->sk_userlocks & SOCK_BINDADDR_LOCK)) | |
307 | inet_reset_saddr(sk); | |
308 | ||
309 | sk->sk_shutdown = 0; | |
310 | sock_reset_flag(sk, SOCK_DONE); | |
311 | ||
312 | icsk->icsk_backoff = 0; | |
313 | inet_csk_delack_init(sk); | |
314 | __sk_dst_reset(sk); | |
315 | ||
316 | BUG_TRAP(!inet->num || icsk->icsk_bind_hash); | |
317 | ||
318 | sk->sk_error_report(sk); | |
319 | return err; | |
320 | } | |
321 | ||
f21e68ca ACM |
322 | EXPORT_SYMBOL_GPL(dccp_disconnect); |
323 | ||
331968bd ACM |
324 | /* |
325 | * Wait for a DCCP event. | |
326 | * | |
327 | * Note that we don't need to lock the socket, as the upper poll layers | |
328 | * take care of normal races (between the test and the event) and we don't | |
329 | * go look at any of the socket buffers directly. | |
330 | */ | |
f21e68ca ACM |
331 | unsigned int dccp_poll(struct file *file, struct socket *sock, |
332 | poll_table *wait) | |
331968bd ACM |
333 | { |
334 | unsigned int mask; | |
335 | struct sock *sk = sock->sk; | |
336 | ||
337 | poll_wait(file, sk->sk_sleep, wait); | |
338 | if (sk->sk_state == DCCP_LISTEN) | |
339 | return inet_csk_listen_poll(sk); | |
340 | ||
341 | /* Socket is not locked. We are protected from async events | |
342 | by poll logic and correct handling of state changes | |
343 | made by another threads is impossible in any case. | |
344 | */ | |
345 | ||
346 | mask = 0; | |
347 | if (sk->sk_err) | |
348 | mask = POLLERR; | |
349 | ||
350 | if (sk->sk_shutdown == SHUTDOWN_MASK || sk->sk_state == DCCP_CLOSED) | |
351 | mask |= POLLHUP; | |
352 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
353 | mask |= POLLIN | POLLRDNORM; | |
354 | ||
355 | /* Connected? */ | |
356 | if ((1 << sk->sk_state) & ~(DCCPF_REQUESTING | DCCPF_RESPOND)) { | |
357 | if (atomic_read(&sk->sk_rmem_alloc) > 0) | |
358 | mask |= POLLIN | POLLRDNORM; | |
359 | ||
360 | if (!(sk->sk_shutdown & SEND_SHUTDOWN)) { | |
361 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) { | |
362 | mask |= POLLOUT | POLLWRNORM; | |
363 | } else { /* send SIGIO later */ | |
364 | set_bit(SOCK_ASYNC_NOSPACE, | |
365 | &sk->sk_socket->flags); | |
366 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); | |
367 | ||
368 | /* Race breaker. If space is freed after | |
369 | * wspace test but before the flags are set, | |
370 | * IO signal will be lost. | |
371 | */ | |
372 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) | |
373 | mask |= POLLOUT | POLLWRNORM; | |
374 | } | |
375 | } | |
376 | } | |
377 | return mask; | |
378 | } | |
379 | ||
f21e68ca ACM |
380 | EXPORT_SYMBOL_GPL(dccp_poll); |
381 | ||
7c657876 ACM |
382 | int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg) |
383 | { | |
384 | dccp_pr_debug("entry\n"); | |
385 | return -ENOIOCTLCMD; | |
386 | } | |
387 | ||
f21e68ca ACM |
388 | EXPORT_SYMBOL_GPL(dccp_ioctl); |
389 | ||
60fe62e7 | 390 | static int dccp_setsockopt_service(struct sock *sk, const __be32 service, |
67e6b629 ACM |
391 | char __user *optval, int optlen) |
392 | { | |
393 | struct dccp_sock *dp = dccp_sk(sk); | |
394 | struct dccp_service_list *sl = NULL; | |
395 | ||
396 | if (service == DCCP_SERVICE_INVALID_VALUE || | |
397 | optlen > DCCP_SERVICE_LIST_MAX_LEN * sizeof(u32)) | |
398 | return -EINVAL; | |
399 | ||
400 | if (optlen > sizeof(service)) { | |
401 | sl = kmalloc(optlen, GFP_KERNEL); | |
402 | if (sl == NULL) | |
403 | return -ENOMEM; | |
404 | ||
405 | sl->dccpsl_nr = optlen / sizeof(u32) - 1; | |
406 | if (copy_from_user(sl->dccpsl_list, | |
407 | optval + sizeof(service), | |
408 | optlen - sizeof(service)) || | |
409 | dccp_list_has_service(sl, DCCP_SERVICE_INVALID_VALUE)) { | |
410 | kfree(sl); | |
411 | return -EFAULT; | |
412 | } | |
413 | } | |
414 | ||
415 | lock_sock(sk); | |
416 | dp->dccps_service = service; | |
417 | ||
a51482bd | 418 | kfree(dp->dccps_service_list); |
67e6b629 ACM |
419 | |
420 | dp->dccps_service_list = sl; | |
421 | release_sock(sk); | |
422 | return 0; | |
423 | } | |
424 | ||
afe00251 AB |
425 | /* byte 1 is feature. the rest is the preference list */ |
426 | static int dccp_setsockopt_change(struct sock *sk, int type, | |
427 | struct dccp_so_feat __user *optval) | |
428 | { | |
429 | struct dccp_so_feat opt; | |
430 | u8 *val; | |
431 | int rc; | |
432 | ||
433 | if (copy_from_user(&opt, optval, sizeof(opt))) | |
434 | return -EFAULT; | |
435 | ||
436 | val = kmalloc(opt.dccpsf_len, GFP_KERNEL); | |
437 | if (!val) | |
438 | return -ENOMEM; | |
439 | ||
440 | if (copy_from_user(val, opt.dccpsf_val, opt.dccpsf_len)) { | |
441 | rc = -EFAULT; | |
442 | goto out_free_val; | |
443 | } | |
444 | ||
445 | rc = dccp_feat_change(sk, type, opt.dccpsf_feat, val, opt.dccpsf_len, | |
446 | GFP_KERNEL); | |
447 | if (rc) | |
448 | goto out_free_val; | |
449 | ||
450 | out: | |
451 | return rc; | |
452 | ||
453 | out_free_val: | |
454 | kfree(val); | |
455 | goto out; | |
456 | } | |
457 | ||
3fdadf7d DM |
458 | static int do_dccp_setsockopt(struct sock *sk, int level, int optname, |
459 | char __user *optval, int optlen) | |
7c657876 | 460 | { |
a84ffe43 ACM |
461 | struct dccp_sock *dp; |
462 | int err; | |
463 | int val; | |
7c657876 | 464 | |
a84ffe43 ACM |
465 | if (optlen < sizeof(int)) |
466 | return -EINVAL; | |
467 | ||
468 | if (get_user(val, (int __user *)optval)) | |
469 | return -EFAULT; | |
470 | ||
67e6b629 ACM |
471 | if (optname == DCCP_SOCKOPT_SERVICE) |
472 | return dccp_setsockopt_service(sk, val, optval, optlen); | |
a84ffe43 | 473 | |
67e6b629 | 474 | lock_sock(sk); |
a84ffe43 ACM |
475 | dp = dccp_sk(sk); |
476 | err = 0; | |
477 | ||
478 | switch (optname) { | |
479 | case DCCP_SOCKOPT_PACKET_SIZE: | |
480 | dp->dccps_packet_size = val; | |
481 | break; | |
afe00251 AB |
482 | |
483 | case DCCP_SOCKOPT_CHANGE_L: | |
484 | if (optlen != sizeof(struct dccp_so_feat)) | |
485 | err = -EINVAL; | |
486 | else | |
487 | err = dccp_setsockopt_change(sk, DCCPO_CHANGE_L, | |
488 | (struct dccp_so_feat *) | |
489 | optval); | |
490 | break; | |
491 | ||
492 | case DCCP_SOCKOPT_CHANGE_R: | |
493 | if (optlen != sizeof(struct dccp_so_feat)) | |
494 | err = -EINVAL; | |
495 | else | |
496 | err = dccp_setsockopt_change(sk, DCCPO_CHANGE_R, | |
497 | (struct dccp_so_feat *) | |
498 | optval); | |
499 | break; | |
500 | ||
a84ffe43 ACM |
501 | default: |
502 | err = -ENOPROTOOPT; | |
503 | break; | |
504 | } | |
505 | ||
506 | release_sock(sk); | |
507 | return err; | |
7c657876 ACM |
508 | } |
509 | ||
3fdadf7d DM |
510 | int dccp_setsockopt(struct sock *sk, int level, int optname, |
511 | char __user *optval, int optlen) | |
512 | { | |
513 | if (level != SOL_DCCP) | |
514 | return inet_csk(sk)->icsk_af_ops->setsockopt(sk, level, | |
515 | optname, optval, | |
516 | optlen); | |
517 | return do_dccp_setsockopt(sk, level, optname, optval, optlen); | |
518 | } | |
543d9cfe | 519 | |
f21e68ca ACM |
520 | EXPORT_SYMBOL_GPL(dccp_setsockopt); |
521 | ||
3fdadf7d DM |
522 | #ifdef CONFIG_COMPAT |
523 | int compat_dccp_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 524 | char __user *optval, int optlen) |
3fdadf7d | 525 | { |
dec73ff0 ACM |
526 | if (level != SOL_DCCP) |
527 | return inet_csk_compat_setsockopt(sk, level, optname, | |
528 | optval, optlen); | |
3fdadf7d DM |
529 | return do_dccp_setsockopt(sk, level, optname, optval, optlen); |
530 | } | |
543d9cfe | 531 | |
3fdadf7d DM |
532 | EXPORT_SYMBOL_GPL(compat_dccp_setsockopt); |
533 | #endif | |
534 | ||
67e6b629 | 535 | static int dccp_getsockopt_service(struct sock *sk, int len, |
60fe62e7 | 536 | __be32 __user *optval, |
67e6b629 ACM |
537 | int __user *optlen) |
538 | { | |
539 | const struct dccp_sock *dp = dccp_sk(sk); | |
540 | const struct dccp_service_list *sl; | |
541 | int err = -ENOENT, slen = 0, total_len = sizeof(u32); | |
542 | ||
543 | lock_sock(sk); | |
544 | if (dccp_service_not_initialized(sk)) | |
545 | goto out; | |
546 | ||
547 | if ((sl = dp->dccps_service_list) != NULL) { | |
548 | slen = sl->dccpsl_nr * sizeof(u32); | |
549 | total_len += slen; | |
550 | } | |
551 | ||
552 | err = -EINVAL; | |
553 | if (total_len > len) | |
554 | goto out; | |
555 | ||
556 | err = 0; | |
557 | if (put_user(total_len, optlen) || | |
558 | put_user(dp->dccps_service, optval) || | |
559 | (sl != NULL && copy_to_user(optval + 1, sl->dccpsl_list, slen))) | |
560 | err = -EFAULT; | |
561 | out: | |
562 | release_sock(sk); | |
563 | return err; | |
564 | } | |
565 | ||
3fdadf7d | 566 | static int do_dccp_getsockopt(struct sock *sk, int level, int optname, |
a1d3a355 | 567 | char __user *optval, int __user *optlen) |
7c657876 | 568 | { |
a84ffe43 ACM |
569 | struct dccp_sock *dp; |
570 | int val, len; | |
7c657876 | 571 | |
a84ffe43 ACM |
572 | if (get_user(len, optlen)) |
573 | return -EFAULT; | |
574 | ||
88f964db | 575 | if (len < sizeof(int)) |
a84ffe43 ACM |
576 | return -EINVAL; |
577 | ||
578 | dp = dccp_sk(sk); | |
579 | ||
580 | switch (optname) { | |
581 | case DCCP_SOCKOPT_PACKET_SIZE: | |
582 | val = dp->dccps_packet_size; | |
88f964db | 583 | len = sizeof(dp->dccps_packet_size); |
a84ffe43 | 584 | break; |
88f964db ACM |
585 | case DCCP_SOCKOPT_SERVICE: |
586 | return dccp_getsockopt_service(sk, len, | |
60fe62e7 | 587 | (__be32 __user *)optval, optlen); |
88f964db ACM |
588 | case 128 ... 191: |
589 | return ccid_hc_rx_getsockopt(dp->dccps_hc_rx_ccid, sk, optname, | |
590 | len, (u32 __user *)optval, optlen); | |
591 | case 192 ... 255: | |
592 | return ccid_hc_tx_getsockopt(dp->dccps_hc_tx_ccid, sk, optname, | |
593 | len, (u32 __user *)optval, optlen); | |
a84ffe43 ACM |
594 | default: |
595 | return -ENOPROTOOPT; | |
596 | } | |
597 | ||
598 | if (put_user(len, optlen) || copy_to_user(optval, &val, len)) | |
599 | return -EFAULT; | |
600 | ||
601 | return 0; | |
7c657876 ACM |
602 | } |
603 | ||
3fdadf7d DM |
604 | int dccp_getsockopt(struct sock *sk, int level, int optname, |
605 | char __user *optval, int __user *optlen) | |
606 | { | |
607 | if (level != SOL_DCCP) | |
608 | return inet_csk(sk)->icsk_af_ops->getsockopt(sk, level, | |
609 | optname, optval, | |
610 | optlen); | |
611 | return do_dccp_getsockopt(sk, level, optname, optval, optlen); | |
612 | } | |
543d9cfe | 613 | |
f21e68ca ACM |
614 | EXPORT_SYMBOL_GPL(dccp_getsockopt); |
615 | ||
3fdadf7d DM |
616 | #ifdef CONFIG_COMPAT |
617 | int compat_dccp_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 618 | char __user *optval, int __user *optlen) |
3fdadf7d | 619 | { |
dec73ff0 ACM |
620 | if (level != SOL_DCCP) |
621 | return inet_csk_compat_getsockopt(sk, level, optname, | |
622 | optval, optlen); | |
3fdadf7d DM |
623 | return do_dccp_getsockopt(sk, level, optname, optval, optlen); |
624 | } | |
543d9cfe | 625 | |
3fdadf7d DM |
626 | EXPORT_SYMBOL_GPL(compat_dccp_getsockopt); |
627 | #endif | |
628 | ||
7c657876 ACM |
629 | int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, |
630 | size_t len) | |
631 | { | |
632 | const struct dccp_sock *dp = dccp_sk(sk); | |
633 | const int flags = msg->msg_flags; | |
634 | const int noblock = flags & MSG_DONTWAIT; | |
635 | struct sk_buff *skb; | |
636 | int rc, size; | |
637 | long timeo; | |
638 | ||
639 | if (len > dp->dccps_mss_cache) | |
640 | return -EMSGSIZE; | |
641 | ||
642 | lock_sock(sk); | |
27258ee5 | 643 | timeo = sock_sndtimeo(sk, noblock); |
7c657876 ACM |
644 | |
645 | /* | |
646 | * We have to use sk_stream_wait_connect here to set sk_write_pending, | |
647 | * so that the trick in dccp_rcv_request_sent_state_process. | |
648 | */ | |
649 | /* Wait for a connection to finish. */ | |
650 | if ((1 << sk->sk_state) & ~(DCCPF_OPEN | DCCPF_PARTOPEN | DCCPF_CLOSING)) | |
651 | if ((rc = sk_stream_wait_connect(sk, &timeo)) != 0) | |
27258ee5 | 652 | goto out_release; |
7c657876 ACM |
653 | |
654 | size = sk->sk_prot->max_header + len; | |
655 | release_sock(sk); | |
656 | skb = sock_alloc_send_skb(sk, size, noblock, &rc); | |
657 | lock_sock(sk); | |
7c657876 ACM |
658 | if (skb == NULL) |
659 | goto out_release; | |
660 | ||
661 | skb_reserve(skb, sk->sk_prot->max_header); | |
662 | rc = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len); | |
27258ee5 ACM |
663 | if (rc != 0) |
664 | goto out_discard; | |
665 | ||
d6809c12 | 666 | rc = dccp_write_xmit(sk, skb, &timeo); |
20472af9 ACM |
667 | /* |
668 | * XXX we don't use sk_write_queue, so just discard the packet. | |
669 | * Current plan however is to _use_ sk_write_queue with | |
670 | * an algorith similar to tcp_sendmsg, where the main difference | |
671 | * is that in DCCP we have to respect packet boundaries, so | |
672 | * no coalescing of skbs. | |
673 | * | |
674 | * This bug was _quickly_ found & fixed by just looking at an OSTRA | |
675 | * generated callgraph 8) -acme | |
676 | */ | |
7c657876 ACM |
677 | out_release: |
678 | release_sock(sk); | |
679 | return rc ? : len; | |
27258ee5 ACM |
680 | out_discard: |
681 | kfree_skb(skb); | |
7c657876 | 682 | goto out_release; |
7c657876 ACM |
683 | } |
684 | ||
f21e68ca ACM |
685 | EXPORT_SYMBOL_GPL(dccp_sendmsg); |
686 | ||
7c657876 ACM |
687 | int dccp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, |
688 | size_t len, int nonblock, int flags, int *addr_len) | |
689 | { | |
690 | const struct dccp_hdr *dh; | |
7c657876 ACM |
691 | long timeo; |
692 | ||
693 | lock_sock(sk); | |
694 | ||
531669a0 ACM |
695 | if (sk->sk_state == DCCP_LISTEN) { |
696 | len = -ENOTCONN; | |
7c657876 | 697 | goto out; |
7c657876 | 698 | } |
7c657876 | 699 | |
531669a0 | 700 | timeo = sock_rcvtimeo(sk, nonblock); |
7c657876 ACM |
701 | |
702 | do { | |
531669a0 | 703 | struct sk_buff *skb = skb_peek(&sk->sk_receive_queue); |
7c657876 | 704 | |
531669a0 ACM |
705 | if (skb == NULL) |
706 | goto verify_sock_status; | |
7c657876 | 707 | |
531669a0 | 708 | dh = dccp_hdr(skb); |
7c657876 | 709 | |
531669a0 ACM |
710 | if (dh->dccph_type == DCCP_PKT_DATA || |
711 | dh->dccph_type == DCCP_PKT_DATAACK) | |
712 | goto found_ok_skb; | |
7c657876 | 713 | |
531669a0 ACM |
714 | if (dh->dccph_type == DCCP_PKT_RESET || |
715 | dh->dccph_type == DCCP_PKT_CLOSE) { | |
716 | dccp_pr_debug("found fin ok!\n"); | |
717 | len = 0; | |
718 | goto found_fin_ok; | |
719 | } | |
720 | dccp_pr_debug("packet_type=%s\n", | |
721 | dccp_packet_name(dh->dccph_type)); | |
722 | sk_eat_skb(sk, skb); | |
723 | verify_sock_status: | |
724 | if (sock_flag(sk, SOCK_DONE)) { | |
725 | len = 0; | |
7c657876 | 726 | break; |
531669a0 | 727 | } |
7c657876 | 728 | |
531669a0 ACM |
729 | if (sk->sk_err) { |
730 | len = sock_error(sk); | |
731 | break; | |
732 | } | |
7c657876 | 733 | |
531669a0 ACM |
734 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
735 | len = 0; | |
736 | break; | |
737 | } | |
7c657876 | 738 | |
531669a0 ACM |
739 | if (sk->sk_state == DCCP_CLOSED) { |
740 | if (!sock_flag(sk, SOCK_DONE)) { | |
741 | /* This occurs when user tries to read | |
742 | * from never connected socket. | |
743 | */ | |
744 | len = -ENOTCONN; | |
7c657876 ACM |
745 | break; |
746 | } | |
531669a0 ACM |
747 | len = 0; |
748 | break; | |
7c657876 ACM |
749 | } |
750 | ||
531669a0 ACM |
751 | if (!timeo) { |
752 | len = -EAGAIN; | |
753 | break; | |
754 | } | |
7c657876 | 755 | |
531669a0 ACM |
756 | if (signal_pending(current)) { |
757 | len = sock_intr_errno(timeo); | |
758 | break; | |
759 | } | |
7c657876 | 760 | |
531669a0 | 761 | sk_wait_data(sk, &timeo); |
7c657876 | 762 | continue; |
7c657876 | 763 | found_ok_skb: |
531669a0 ACM |
764 | if (len > skb->len) |
765 | len = skb->len; | |
766 | else if (len < skb->len) | |
767 | msg->msg_flags |= MSG_TRUNC; | |
768 | ||
769 | if (skb_copy_datagram_iovec(skb, 0, msg->msg_iov, len)) { | |
770 | /* Exception. Bailout! */ | |
771 | len = -EFAULT; | |
772 | break; | |
7c657876 | 773 | } |
7c657876 ACM |
774 | found_fin_ok: |
775 | if (!(flags & MSG_PEEK)) | |
776 | sk_eat_skb(sk, skb); | |
777 | break; | |
531669a0 | 778 | } while (1); |
7c657876 ACM |
779 | out: |
780 | release_sock(sk); | |
531669a0 | 781 | return len; |
7c657876 ACM |
782 | } |
783 | ||
f21e68ca ACM |
784 | EXPORT_SYMBOL_GPL(dccp_recvmsg); |
785 | ||
786 | int inet_dccp_listen(struct socket *sock, int backlog) | |
7c657876 ACM |
787 | { |
788 | struct sock *sk = sock->sk; | |
789 | unsigned char old_state; | |
790 | int err; | |
791 | ||
792 | lock_sock(sk); | |
793 | ||
794 | err = -EINVAL; | |
795 | if (sock->state != SS_UNCONNECTED || sock->type != SOCK_DCCP) | |
796 | goto out; | |
797 | ||
798 | old_state = sk->sk_state; | |
799 | if (!((1 << old_state) & (DCCPF_CLOSED | DCCPF_LISTEN))) | |
800 | goto out; | |
801 | ||
802 | /* Really, if the socket is already in listen state | |
803 | * we can only allow the backlog to be adjusted. | |
804 | */ | |
805 | if (old_state != DCCP_LISTEN) { | |
806 | /* | |
807 | * FIXME: here it probably should be sk->sk_prot->listen_start | |
808 | * see tcp_listen_start | |
809 | */ | |
810 | err = dccp_listen_start(sk); | |
811 | if (err) | |
812 | goto out; | |
813 | } | |
814 | sk->sk_max_ack_backlog = backlog; | |
815 | err = 0; | |
816 | ||
817 | out: | |
818 | release_sock(sk); | |
819 | return err; | |
820 | } | |
821 | ||
f21e68ca ACM |
822 | EXPORT_SYMBOL_GPL(inet_dccp_listen); |
823 | ||
7c657876 | 824 | static const unsigned char dccp_new_state[] = { |
7690af3f ACM |
825 | /* current state: new state: action: */ |
826 | [0] = DCCP_CLOSED, | |
827 | [DCCP_OPEN] = DCCP_CLOSING | DCCP_ACTION_FIN, | |
828 | [DCCP_REQUESTING] = DCCP_CLOSED, | |
829 | [DCCP_PARTOPEN] = DCCP_CLOSING | DCCP_ACTION_FIN, | |
830 | [DCCP_LISTEN] = DCCP_CLOSED, | |
831 | [DCCP_RESPOND] = DCCP_CLOSED, | |
832 | [DCCP_CLOSING] = DCCP_CLOSED, | |
833 | [DCCP_TIME_WAIT] = DCCP_CLOSED, | |
834 | [DCCP_CLOSED] = DCCP_CLOSED, | |
7c657876 ACM |
835 | }; |
836 | ||
837 | static int dccp_close_state(struct sock *sk) | |
838 | { | |
839 | const int next = dccp_new_state[sk->sk_state]; | |
840 | const int ns = next & DCCP_STATE_MASK; | |
841 | ||
842 | if (ns != sk->sk_state) | |
843 | dccp_set_state(sk, ns); | |
844 | ||
845 | return next & DCCP_ACTION_FIN; | |
846 | } | |
847 | ||
848 | void dccp_close(struct sock *sk, long timeout) | |
849 | { | |
850 | struct sk_buff *skb; | |
851 | ||
852 | lock_sock(sk); | |
853 | ||
854 | sk->sk_shutdown = SHUTDOWN_MASK; | |
855 | ||
856 | if (sk->sk_state == DCCP_LISTEN) { | |
857 | dccp_set_state(sk, DCCP_CLOSED); | |
858 | ||
859 | /* Special case. */ | |
860 | inet_csk_listen_stop(sk); | |
861 | ||
862 | goto adjudge_to_death; | |
863 | } | |
864 | ||
865 | /* | |
866 | * We need to flush the recv. buffs. We do this only on the | |
867 | * descriptor close, not protocol-sourced closes, because the | |
868 | *reader process may not have drained the data yet! | |
869 | */ | |
870 | /* FIXME: check for unread data */ | |
871 | while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
872 | __kfree_skb(skb); | |
873 | } | |
874 | ||
875 | if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) { | |
876 | /* Check zero linger _after_ checking for unread data. */ | |
877 | sk->sk_prot->disconnect(sk, 0); | |
878 | } else if (dccp_close_state(sk)) { | |
7ad07e7c | 879 | dccp_send_close(sk, 1); |
7c657876 ACM |
880 | } |
881 | ||
882 | sk_stream_wait_close(sk, timeout); | |
883 | ||
884 | adjudge_to_death: | |
7ad07e7c ACM |
885 | /* |
886 | * It is the last release_sock in its life. It will remove backlog. | |
887 | */ | |
7c657876 ACM |
888 | release_sock(sk); |
889 | /* | |
890 | * Now socket is owned by kernel and we acquire BH lock | |
891 | * to finish close. No need to check for user refs. | |
892 | */ | |
893 | local_bh_disable(); | |
894 | bh_lock_sock(sk); | |
895 | BUG_TRAP(!sock_owned_by_user(sk)); | |
896 | ||
897 | sock_hold(sk); | |
898 | sock_orphan(sk); | |
7ad07e7c ACM |
899 | |
900 | /* | |
901 | * The last release_sock may have processed the CLOSE or RESET | |
902 | * packet moving sock to CLOSED state, if not we have to fire | |
903 | * the CLOSE/CLOSEREQ retransmission timer, see "8.3. Termination" | |
904 | * in draft-ietf-dccp-spec-11. -acme | |
905 | */ | |
906 | if (sk->sk_state == DCCP_CLOSING) { | |
907 | /* FIXME: should start at 2 * RTT */ | |
908 | /* Timer for repeating the CLOSE/CLOSEREQ until an answer. */ | |
909 | inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, | |
910 | inet_csk(sk)->icsk_rto, | |
911 | DCCP_RTO_MAX); | |
912 | #if 0 | |
913 | /* Yeah, we should use sk->sk_prot->orphan_count, etc */ | |
7c657876 | 914 | dccp_set_state(sk, DCCP_CLOSED); |
7ad07e7c ACM |
915 | #endif |
916 | } | |
7c657876 | 917 | |
7ad07e7c | 918 | atomic_inc(sk->sk_prot->orphan_count); |
7c657876 ACM |
919 | if (sk->sk_state == DCCP_CLOSED) |
920 | inet_csk_destroy_sock(sk); | |
921 | ||
922 | /* Otherwise, socket is reprieved until protocol close. */ | |
923 | ||
924 | bh_unlock_sock(sk); | |
925 | local_bh_enable(); | |
926 | sock_put(sk); | |
927 | } | |
928 | ||
f21e68ca ACM |
929 | EXPORT_SYMBOL_GPL(dccp_close); |
930 | ||
7c657876 ACM |
931 | void dccp_shutdown(struct sock *sk, int how) |
932 | { | |
933 | dccp_pr_debug("entry\n"); | |
934 | } | |
935 | ||
f21e68ca ACM |
936 | EXPORT_SYMBOL_GPL(dccp_shutdown); |
937 | ||
46f09ffa | 938 | static int __init dccp_mib_init(void) |
7c657876 ACM |
939 | { |
940 | int rc = -ENOMEM; | |
941 | ||
942 | dccp_statistics[0] = alloc_percpu(struct dccp_mib); | |
943 | if (dccp_statistics[0] == NULL) | |
944 | goto out; | |
945 | ||
946 | dccp_statistics[1] = alloc_percpu(struct dccp_mib); | |
947 | if (dccp_statistics[1] == NULL) | |
948 | goto out_free_one; | |
949 | ||
950 | rc = 0; | |
951 | out: | |
952 | return rc; | |
953 | out_free_one: | |
954 | free_percpu(dccp_statistics[0]); | |
955 | dccp_statistics[0] = NULL; | |
956 | goto out; | |
957 | ||
958 | } | |
959 | ||
b61fafc4 | 960 | static void dccp_mib_exit(void) |
46f09ffa ACM |
961 | { |
962 | free_percpu(dccp_statistics[0]); | |
963 | free_percpu(dccp_statistics[1]); | |
964 | dccp_statistics[0] = dccp_statistics[1] = NULL; | |
965 | } | |
966 | ||
7c657876 ACM |
967 | static int thash_entries; |
968 | module_param(thash_entries, int, 0444); | |
969 | MODULE_PARM_DESC(thash_entries, "Number of ehash buckets"); | |
970 | ||
a1d3a355 | 971 | #ifdef CONFIG_IP_DCCP_DEBUG |
7c657876 ACM |
972 | int dccp_debug; |
973 | module_param(dccp_debug, int, 0444); | |
974 | MODULE_PARM_DESC(dccp_debug, "Enable debug messages"); | |
f21e68ca ACM |
975 | |
976 | EXPORT_SYMBOL_GPL(dccp_debug); | |
a1d3a355 | 977 | #endif |
7c657876 ACM |
978 | |
979 | static int __init dccp_init(void) | |
980 | { | |
981 | unsigned long goal; | |
982 | int ehash_order, bhash_order, i; | |
b61fafc4 | 983 | int rc = -ENOBUFS; |
7c657876 | 984 | |
7690af3f ACM |
985 | dccp_hashinfo.bind_bucket_cachep = |
986 | kmem_cache_create("dccp_bind_bucket", | |
987 | sizeof(struct inet_bind_bucket), 0, | |
988 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
7c657876 | 989 | if (!dccp_hashinfo.bind_bucket_cachep) |
b61fafc4 | 990 | goto out; |
7c657876 ACM |
991 | |
992 | /* | |
993 | * Size and allocate the main established and bind bucket | |
994 | * hash tables. | |
995 | * | |
996 | * The methodology is similar to that of the buffer cache. | |
997 | */ | |
998 | if (num_physpages >= (128 * 1024)) | |
999 | goal = num_physpages >> (21 - PAGE_SHIFT); | |
1000 | else | |
1001 | goal = num_physpages >> (23 - PAGE_SHIFT); | |
1002 | ||
1003 | if (thash_entries) | |
7690af3f ACM |
1004 | goal = (thash_entries * |
1005 | sizeof(struct inet_ehash_bucket)) >> PAGE_SHIFT; | |
7c657876 ACM |
1006 | for (ehash_order = 0; (1UL << ehash_order) < goal; ehash_order++) |
1007 | ; | |
1008 | do { | |
1009 | dccp_hashinfo.ehash_size = (1UL << ehash_order) * PAGE_SIZE / | |
1010 | sizeof(struct inet_ehash_bucket); | |
1011 | dccp_hashinfo.ehash_size >>= 1; | |
7690af3f ACM |
1012 | while (dccp_hashinfo.ehash_size & |
1013 | (dccp_hashinfo.ehash_size - 1)) | |
7c657876 ACM |
1014 | dccp_hashinfo.ehash_size--; |
1015 | dccp_hashinfo.ehash = (struct inet_ehash_bucket *) | |
1016 | __get_free_pages(GFP_ATOMIC, ehash_order); | |
1017 | } while (!dccp_hashinfo.ehash && --ehash_order > 0); | |
1018 | ||
1019 | if (!dccp_hashinfo.ehash) { | |
1020 | printk(KERN_CRIT "Failed to allocate DCCP " | |
1021 | "established hash table\n"); | |
1022 | goto out_free_bind_bucket_cachep; | |
1023 | } | |
1024 | ||
1025 | for (i = 0; i < (dccp_hashinfo.ehash_size << 1); i++) { | |
1026 | rwlock_init(&dccp_hashinfo.ehash[i].lock); | |
1027 | INIT_HLIST_HEAD(&dccp_hashinfo.ehash[i].chain); | |
1028 | } | |
1029 | ||
1030 | bhash_order = ehash_order; | |
1031 | ||
1032 | do { | |
1033 | dccp_hashinfo.bhash_size = (1UL << bhash_order) * PAGE_SIZE / | |
1034 | sizeof(struct inet_bind_hashbucket); | |
7690af3f ACM |
1035 | if ((dccp_hashinfo.bhash_size > (64 * 1024)) && |
1036 | bhash_order > 0) | |
7c657876 ACM |
1037 | continue; |
1038 | dccp_hashinfo.bhash = (struct inet_bind_hashbucket *) | |
1039 | __get_free_pages(GFP_ATOMIC, bhash_order); | |
1040 | } while (!dccp_hashinfo.bhash && --bhash_order >= 0); | |
1041 | ||
1042 | if (!dccp_hashinfo.bhash) { | |
1043 | printk(KERN_CRIT "Failed to allocate DCCP bind hash table\n"); | |
1044 | goto out_free_dccp_ehash; | |
1045 | } | |
1046 | ||
1047 | for (i = 0; i < dccp_hashinfo.bhash_size; i++) { | |
1048 | spin_lock_init(&dccp_hashinfo.bhash[i].lock); | |
1049 | INIT_HLIST_HEAD(&dccp_hashinfo.bhash[i].chain); | |
1050 | } | |
1051 | ||
46f09ffa | 1052 | rc = dccp_mib_init(); |
fa23e2ec | 1053 | if (rc) |
7c657876 ACM |
1054 | goto out_free_dccp_bhash; |
1055 | ||
9b07ef5d | 1056 | rc = dccp_ackvec_init(); |
7c657876 | 1057 | if (rc) |
b61fafc4 | 1058 | goto out_free_dccp_mib; |
9b07ef5d | 1059 | |
e55d912f | 1060 | rc = dccp_sysctl_init(); |
9b07ef5d ACM |
1061 | if (rc) |
1062 | goto out_ackvec_exit; | |
7c657876 ACM |
1063 | out: |
1064 | return rc; | |
9b07ef5d ACM |
1065 | out_ackvec_exit: |
1066 | dccp_ackvec_exit(); | |
b61fafc4 | 1067 | out_free_dccp_mib: |
46f09ffa | 1068 | dccp_mib_exit(); |
7c657876 ACM |
1069 | out_free_dccp_bhash: |
1070 | free_pages((unsigned long)dccp_hashinfo.bhash, bhash_order); | |
1071 | dccp_hashinfo.bhash = NULL; | |
1072 | out_free_dccp_ehash: | |
1073 | free_pages((unsigned long)dccp_hashinfo.ehash, ehash_order); | |
1074 | dccp_hashinfo.ehash = NULL; | |
1075 | out_free_bind_bucket_cachep: | |
1076 | kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); | |
1077 | dccp_hashinfo.bind_bucket_cachep = NULL; | |
7c657876 ACM |
1078 | goto out; |
1079 | } | |
1080 | ||
7c657876 ACM |
1081 | static void __exit dccp_fini(void) |
1082 | { | |
46f09ffa | 1083 | dccp_mib_exit(); |
725ba8ee ACM |
1084 | free_pages((unsigned long)dccp_hashinfo.bhash, |
1085 | get_order(dccp_hashinfo.bhash_size * | |
1086 | sizeof(struct inet_bind_hashbucket))); | |
1087 | free_pages((unsigned long)dccp_hashinfo.ehash, | |
1088 | get_order(dccp_hashinfo.ehash_size * | |
1089 | sizeof(struct inet_ehash_bucket))); | |
7c657876 | 1090 | kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); |
9b07ef5d | 1091 | dccp_ackvec_exit(); |
e55d912f | 1092 | dccp_sysctl_exit(); |
7c657876 ACM |
1093 | } |
1094 | ||
1095 | module_init(dccp_init); | |
1096 | module_exit(dccp_fini); | |
1097 | ||
7c657876 ACM |
1098 | MODULE_LICENSE("GPL"); |
1099 | MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@conectiva.com.br>"); | |
1100 | MODULE_DESCRIPTION("DCCP - Datagram Congestion Controlled Protocol"); |