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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 | ||
7c657876 ACM |
12 | #include <linux/dccp.h> |
13 | #include <linux/module.h> | |
14 | #include <linux/types.h> | |
15 | #include <linux/sched.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/skbuff.h> | |
18 | #include <linux/netdevice.h> | |
19 | #include <linux/in.h> | |
20 | #include <linux/if_arp.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/random.h> | |
23 | #include <net/checksum.h> | |
24 | ||
14c85021 | 25 | #include <net/inet_sock.h> |
7c657876 ACM |
26 | #include <net/sock.h> |
27 | #include <net/xfrm.h> | |
28 | ||
29 | #include <asm/semaphore.h> | |
30 | #include <linux/spinlock.h> | |
31 | #include <linux/timer.h> | |
32 | #include <linux/delay.h> | |
33 | #include <linux/poll.h> | |
7c657876 ACM |
34 | |
35 | #include "ccid.h" | |
36 | #include "dccp.h" | |
afe00251 | 37 | #include "feat.h" |
7c657876 | 38 | |
ba89966c | 39 | DEFINE_SNMP_STAT(struct dccp_mib, dccp_statistics) __read_mostly; |
7c657876 | 40 | |
f21e68ca ACM |
41 | EXPORT_SYMBOL_GPL(dccp_statistics); |
42 | ||
7c657876 ACM |
43 | atomic_t dccp_orphan_count = ATOMIC_INIT(0); |
44 | ||
f21e68ca ACM |
45 | EXPORT_SYMBOL_GPL(dccp_orphan_count); |
46 | ||
075ae866 ACM |
47 | struct inet_hashinfo __cacheline_aligned dccp_hashinfo = { |
48 | .lhash_lock = RW_LOCK_UNLOCKED, | |
49 | .lhash_users = ATOMIC_INIT(0), | |
50 | .lhash_wait = __WAIT_QUEUE_HEAD_INITIALIZER(dccp_hashinfo.lhash_wait), | |
51 | }; | |
52 | ||
53 | EXPORT_SYMBOL_GPL(dccp_hashinfo); | |
54 | ||
c25a18ba ACM |
55 | void dccp_set_state(struct sock *sk, const int state) |
56 | { | |
57 | const int oldstate = sk->sk_state; | |
58 | ||
59 | dccp_pr_debug("%s(%p) %-10.10s -> %s\n", | |
60 | dccp_role(sk), sk, | |
61 | dccp_state_name(oldstate), dccp_state_name(state)); | |
62 | WARN_ON(state == oldstate); | |
63 | ||
64 | switch (state) { | |
65 | case DCCP_OPEN: | |
66 | if (oldstate != DCCP_OPEN) | |
67 | DCCP_INC_STATS(DCCP_MIB_CURRESTAB); | |
68 | break; | |
69 | ||
70 | case DCCP_CLOSED: | |
71 | if (oldstate == DCCP_CLOSING || oldstate == DCCP_OPEN) | |
72 | DCCP_INC_STATS(DCCP_MIB_ESTABRESETS); | |
73 | ||
74 | sk->sk_prot->unhash(sk); | |
75 | if (inet_csk(sk)->icsk_bind_hash != NULL && | |
76 | !(sk->sk_userlocks & SOCK_BINDPORT_LOCK)) | |
77 | inet_put_port(&dccp_hashinfo, sk); | |
78 | /* fall through */ | |
79 | default: | |
80 | if (oldstate == DCCP_OPEN) | |
81 | DCCP_DEC_STATS(DCCP_MIB_CURRESTAB); | |
82 | } | |
83 | ||
84 | /* Change state AFTER socket is unhashed to avoid closed | |
85 | * socket sitting in hash tables. | |
86 | */ | |
87 | sk->sk_state = state; | |
88 | } | |
89 | ||
90 | EXPORT_SYMBOL_GPL(dccp_set_state); | |
91 | ||
92 | void dccp_done(struct sock *sk) | |
93 | { | |
94 | dccp_set_state(sk, DCCP_CLOSED); | |
95 | dccp_clear_xmit_timers(sk); | |
96 | ||
97 | sk->sk_shutdown = SHUTDOWN_MASK; | |
98 | ||
99 | if (!sock_flag(sk, SOCK_DEAD)) | |
100 | sk->sk_state_change(sk); | |
101 | else | |
102 | inet_csk_destroy_sock(sk); | |
103 | } | |
104 | ||
105 | EXPORT_SYMBOL_GPL(dccp_done); | |
106 | ||
7c657876 ACM |
107 | const char *dccp_packet_name(const int type) |
108 | { | |
109 | static const char *dccp_packet_names[] = { | |
110 | [DCCP_PKT_REQUEST] = "REQUEST", | |
111 | [DCCP_PKT_RESPONSE] = "RESPONSE", | |
112 | [DCCP_PKT_DATA] = "DATA", | |
113 | [DCCP_PKT_ACK] = "ACK", | |
114 | [DCCP_PKT_DATAACK] = "DATAACK", | |
115 | [DCCP_PKT_CLOSEREQ] = "CLOSEREQ", | |
116 | [DCCP_PKT_CLOSE] = "CLOSE", | |
117 | [DCCP_PKT_RESET] = "RESET", | |
118 | [DCCP_PKT_SYNC] = "SYNC", | |
119 | [DCCP_PKT_SYNCACK] = "SYNCACK", | |
120 | }; | |
121 | ||
122 | if (type >= DCCP_NR_PKT_TYPES) | |
123 | return "INVALID"; | |
124 | else | |
125 | return dccp_packet_names[type]; | |
126 | } | |
127 | ||
128 | EXPORT_SYMBOL_GPL(dccp_packet_name); | |
129 | ||
130 | const char *dccp_state_name(const int state) | |
131 | { | |
132 | static char *dccp_state_names[] = { | |
133 | [DCCP_OPEN] = "OPEN", | |
134 | [DCCP_REQUESTING] = "REQUESTING", | |
135 | [DCCP_PARTOPEN] = "PARTOPEN", | |
136 | [DCCP_LISTEN] = "LISTEN", | |
137 | [DCCP_RESPOND] = "RESPOND", | |
138 | [DCCP_CLOSING] = "CLOSING", | |
139 | [DCCP_TIME_WAIT] = "TIME_WAIT", | |
140 | [DCCP_CLOSED] = "CLOSED", | |
141 | }; | |
142 | ||
143 | if (state >= DCCP_MAX_STATES) | |
144 | return "INVALID STATE!"; | |
145 | else | |
146 | return dccp_state_names[state]; | |
147 | } | |
148 | ||
149 | EXPORT_SYMBOL_GPL(dccp_state_name); | |
150 | ||
c985ed70 ACM |
151 | void dccp_hash(struct sock *sk) |
152 | { | |
153 | inet_hash(&dccp_hashinfo, sk); | |
154 | } | |
155 | ||
156 | EXPORT_SYMBOL_GPL(dccp_hash); | |
157 | ||
158 | void dccp_unhash(struct sock *sk) | |
159 | { | |
160 | inet_unhash(&dccp_hashinfo, sk); | |
161 | } | |
162 | ||
163 | EXPORT_SYMBOL_GPL(dccp_unhash); | |
164 | ||
72478873 | 165 | int dccp_init_sock(struct sock *sk, const __u8 ctl_sock_initialized) |
3e0fadc5 ACM |
166 | { |
167 | struct dccp_sock *dp = dccp_sk(sk); | |
a4bf3902 | 168 | struct dccp_minisock *dmsk = dccp_msk(sk); |
3e0fadc5 | 169 | struct inet_connection_sock *icsk = inet_csk(sk); |
3e0fadc5 | 170 | |
a4bf3902 | 171 | dccp_minisock_init(&dp->dccps_minisock); |
3e0fadc5 ACM |
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)) { |
8ca0d17b | 182 | int rc = dccp_feat_init(dmsk); |
3e0fadc5 ACM |
183 | |
184 | if (rc) | |
185 | return rc; | |
186 | ||
a4bf3902 | 187 | if (dmsk->dccpms_send_ack_vector) { |
3e0fadc5 ACM |
188 | dp->dccps_hc_rx_ackvec = dccp_ackvec_alloc(GFP_KERNEL); |
189 | if (dp->dccps_hc_rx_ackvec == NULL) | |
190 | return -ENOMEM; | |
191 | } | |
a4bf3902 ACM |
192 | dp->dccps_hc_rx_ccid = ccid_hc_rx_new(dmsk->dccpms_rx_ccid, |
193 | sk, GFP_KERNEL); | |
194 | dp->dccps_hc_tx_ccid = ccid_hc_tx_new(dmsk->dccpms_tx_ccid, | |
195 | sk, GFP_KERNEL); | |
3e0fadc5 ACM |
196 | if (unlikely(dp->dccps_hc_rx_ccid == NULL || |
197 | dp->dccps_hc_tx_ccid == NULL)) { | |
198 | ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk); | |
199 | ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk); | |
a4bf3902 | 200 | if (dmsk->dccpms_send_ack_vector) { |
3e0fadc5 ACM |
201 | dccp_ackvec_free(dp->dccps_hc_rx_ackvec); |
202 | dp->dccps_hc_rx_ackvec = NULL; | |
203 | } | |
204 | dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL; | |
205 | return -ENOMEM; | |
206 | } | |
207 | } else { | |
208 | /* control socket doesn't need feat nego */ | |
a4bf3902 ACM |
209 | INIT_LIST_HEAD(&dmsk->dccpms_pending); |
210 | INIT_LIST_HEAD(&dmsk->dccpms_conf); | |
3e0fadc5 ACM |
211 | } |
212 | ||
213 | dccp_init_xmit_timers(sk); | |
214 | icsk->icsk_rto = DCCP_TIMEOUT_INIT; | |
215 | sk->sk_state = DCCP_CLOSED; | |
216 | sk->sk_write_space = dccp_write_space; | |
217 | icsk->icsk_sync_mss = dccp_sync_mss; | |
218 | dp->dccps_mss_cache = 536; | |
219 | dp->dccps_role = DCCP_ROLE_UNDEFINED; | |
220 | dp->dccps_service = DCCP_SERVICE_INVALID_VALUE; | |
221 | dp->dccps_l_ack_ratio = dp->dccps_r_ack_ratio = 1; | |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
226 | EXPORT_SYMBOL_GPL(dccp_init_sock); | |
227 | ||
228 | int dccp_destroy_sock(struct sock *sk) | |
229 | { | |
230 | struct dccp_sock *dp = dccp_sk(sk); | |
8ca0d17b | 231 | struct dccp_minisock *dmsk = dccp_msk(sk); |
3e0fadc5 ACM |
232 | |
233 | /* | |
234 | * DCCP doesn't use sk_write_queue, just sk_send_head | |
235 | * for retransmissions | |
236 | */ | |
237 | if (sk->sk_send_head != NULL) { | |
238 | kfree_skb(sk->sk_send_head); | |
239 | sk->sk_send_head = NULL; | |
240 | } | |
241 | ||
242 | /* Clean up a referenced DCCP bind bucket. */ | |
243 | if (inet_csk(sk)->icsk_bind_hash != NULL) | |
244 | inet_put_port(&dccp_hashinfo, sk); | |
245 | ||
246 | kfree(dp->dccps_service_list); | |
247 | dp->dccps_service_list = NULL; | |
248 | ||
8ca0d17b | 249 | if (dmsk->dccpms_send_ack_vector) { |
3e0fadc5 ACM |
250 | dccp_ackvec_free(dp->dccps_hc_rx_ackvec); |
251 | dp->dccps_hc_rx_ackvec = NULL; | |
252 | } | |
253 | ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk); | |
254 | ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk); | |
255 | dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL; | |
256 | ||
257 | /* clean up feature negotiation state */ | |
8ca0d17b | 258 | dccp_feat_clean(dmsk); |
3e0fadc5 ACM |
259 | |
260 | return 0; | |
261 | } | |
262 | ||
263 | EXPORT_SYMBOL_GPL(dccp_destroy_sock); | |
264 | ||
7c657876 ACM |
265 | static inline int dccp_listen_start(struct sock *sk) |
266 | { | |
67e6b629 ACM |
267 | struct dccp_sock *dp = dccp_sk(sk); |
268 | ||
269 | dp->dccps_role = DCCP_ROLE_LISTEN; | |
270 | /* | |
271 | * Apps need to use setsockopt(DCCP_SOCKOPT_SERVICE) | |
272 | * before calling listen() | |
273 | */ | |
274 | if (dccp_service_not_initialized(sk)) | |
275 | return -EPROTO; | |
7c657876 ACM |
276 | return inet_csk_listen_start(sk, TCP_SYNQ_HSIZE); |
277 | } | |
278 | ||
279 | int dccp_disconnect(struct sock *sk, int flags) | |
280 | { | |
281 | struct inet_connection_sock *icsk = inet_csk(sk); | |
282 | struct inet_sock *inet = inet_sk(sk); | |
283 | int err = 0; | |
284 | const int old_state = sk->sk_state; | |
285 | ||
286 | if (old_state != DCCP_CLOSED) | |
287 | dccp_set_state(sk, DCCP_CLOSED); | |
288 | ||
289 | /* ABORT function of RFC793 */ | |
290 | if (old_state == DCCP_LISTEN) { | |
291 | inet_csk_listen_stop(sk); | |
292 | /* FIXME: do the active reset thing */ | |
293 | } else if (old_state == DCCP_REQUESTING) | |
294 | sk->sk_err = ECONNRESET; | |
295 | ||
296 | dccp_clear_xmit_timers(sk); | |
297 | __skb_queue_purge(&sk->sk_receive_queue); | |
298 | if (sk->sk_send_head != NULL) { | |
299 | __kfree_skb(sk->sk_send_head); | |
300 | sk->sk_send_head = NULL; | |
301 | } | |
302 | ||
303 | inet->dport = 0; | |
304 | ||
305 | if (!(sk->sk_userlocks & SOCK_BINDADDR_LOCK)) | |
306 | inet_reset_saddr(sk); | |
307 | ||
308 | sk->sk_shutdown = 0; | |
309 | sock_reset_flag(sk, SOCK_DONE); | |
310 | ||
311 | icsk->icsk_backoff = 0; | |
312 | inet_csk_delack_init(sk); | |
313 | __sk_dst_reset(sk); | |
314 | ||
315 | BUG_TRAP(!inet->num || icsk->icsk_bind_hash); | |
316 | ||
317 | sk->sk_error_report(sk); | |
318 | return err; | |
319 | } | |
320 | ||
f21e68ca ACM |
321 | EXPORT_SYMBOL_GPL(dccp_disconnect); |
322 | ||
331968bd ACM |
323 | /* |
324 | * Wait for a DCCP event. | |
325 | * | |
326 | * Note that we don't need to lock the socket, as the upper poll layers | |
327 | * take care of normal races (between the test and the event) and we don't | |
328 | * go look at any of the socket buffers directly. | |
329 | */ | |
f21e68ca ACM |
330 | unsigned int dccp_poll(struct file *file, struct socket *sock, |
331 | poll_table *wait) | |
331968bd ACM |
332 | { |
333 | unsigned int mask; | |
334 | struct sock *sk = sock->sk; | |
335 | ||
336 | poll_wait(file, sk->sk_sleep, wait); | |
337 | if (sk->sk_state == DCCP_LISTEN) | |
338 | return inet_csk_listen_poll(sk); | |
339 | ||
340 | /* Socket is not locked. We are protected from async events | |
341 | by poll logic and correct handling of state changes | |
342 | made by another threads is impossible in any case. | |
343 | */ | |
344 | ||
345 | mask = 0; | |
346 | if (sk->sk_err) | |
347 | mask = POLLERR; | |
348 | ||
349 | if (sk->sk_shutdown == SHUTDOWN_MASK || sk->sk_state == DCCP_CLOSED) | |
350 | mask |= POLLHUP; | |
351 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
f348d70a | 352 | mask |= POLLIN | POLLRDNORM | POLLRDHUP; |
331968bd ACM |
353 | |
354 | /* Connected? */ | |
355 | if ((1 << sk->sk_state) & ~(DCCPF_REQUESTING | DCCPF_RESPOND)) { | |
356 | if (atomic_read(&sk->sk_rmem_alloc) > 0) | |
357 | mask |= POLLIN | POLLRDNORM; | |
358 | ||
359 | if (!(sk->sk_shutdown & SEND_SHUTDOWN)) { | |
360 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) { | |
361 | mask |= POLLOUT | POLLWRNORM; | |
362 | } else { /* send SIGIO later */ | |
363 | set_bit(SOCK_ASYNC_NOSPACE, | |
364 | &sk->sk_socket->flags); | |
365 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); | |
366 | ||
367 | /* Race breaker. If space is freed after | |
368 | * wspace test but before the flags are set, | |
369 | * IO signal will be lost. | |
370 | */ | |
371 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) | |
372 | mask |= POLLOUT | POLLWRNORM; | |
373 | } | |
374 | } | |
375 | } | |
376 | return mask; | |
377 | } | |
378 | ||
f21e68ca ACM |
379 | EXPORT_SYMBOL_GPL(dccp_poll); |
380 | ||
7c657876 ACM |
381 | int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg) |
382 | { | |
383 | dccp_pr_debug("entry\n"); | |
384 | return -ENOIOCTLCMD; | |
385 | } | |
386 | ||
f21e68ca ACM |
387 | EXPORT_SYMBOL_GPL(dccp_ioctl); |
388 | ||
60fe62e7 | 389 | static int dccp_setsockopt_service(struct sock *sk, const __be32 service, |
67e6b629 ACM |
390 | char __user *optval, int optlen) |
391 | { | |
392 | struct dccp_sock *dp = dccp_sk(sk); | |
393 | struct dccp_service_list *sl = NULL; | |
394 | ||
395 | if (service == DCCP_SERVICE_INVALID_VALUE || | |
396 | optlen > DCCP_SERVICE_LIST_MAX_LEN * sizeof(u32)) | |
397 | return -EINVAL; | |
398 | ||
399 | if (optlen > sizeof(service)) { | |
400 | sl = kmalloc(optlen, GFP_KERNEL); | |
401 | if (sl == NULL) | |
402 | return -ENOMEM; | |
403 | ||
404 | sl->dccpsl_nr = optlen / sizeof(u32) - 1; | |
405 | if (copy_from_user(sl->dccpsl_list, | |
406 | optval + sizeof(service), | |
407 | optlen - sizeof(service)) || | |
408 | dccp_list_has_service(sl, DCCP_SERVICE_INVALID_VALUE)) { | |
409 | kfree(sl); | |
410 | return -EFAULT; | |
411 | } | |
412 | } | |
413 | ||
414 | lock_sock(sk); | |
415 | dp->dccps_service = service; | |
416 | ||
a51482bd | 417 | kfree(dp->dccps_service_list); |
67e6b629 ACM |
418 | |
419 | dp->dccps_service_list = sl; | |
420 | release_sock(sk); | |
421 | return 0; | |
422 | } | |
423 | ||
afe00251 AB |
424 | /* byte 1 is feature. the rest is the preference list */ |
425 | static int dccp_setsockopt_change(struct sock *sk, int type, | |
426 | struct dccp_so_feat __user *optval) | |
427 | { | |
428 | struct dccp_so_feat opt; | |
429 | u8 *val; | |
430 | int rc; | |
431 | ||
432 | if (copy_from_user(&opt, optval, sizeof(opt))) | |
433 | return -EFAULT; | |
434 | ||
435 | val = kmalloc(opt.dccpsf_len, GFP_KERNEL); | |
436 | if (!val) | |
437 | return -ENOMEM; | |
438 | ||
439 | if (copy_from_user(val, opt.dccpsf_val, opt.dccpsf_len)) { | |
440 | rc = -EFAULT; | |
441 | goto out_free_val; | |
442 | } | |
443 | ||
8ca0d17b ACM |
444 | rc = dccp_feat_change(dccp_msk(sk), type, opt.dccpsf_feat, |
445 | val, opt.dccpsf_len, GFP_KERNEL); | |
afe00251 AB |
446 | if (rc) |
447 | goto out_free_val; | |
448 | ||
449 | out: | |
450 | return rc; | |
451 | ||
452 | out_free_val: | |
453 | kfree(val); | |
454 | goto out; | |
455 | } | |
456 | ||
3fdadf7d DM |
457 | static int do_dccp_setsockopt(struct sock *sk, int level, int optname, |
458 | char __user *optval, int optlen) | |
7c657876 | 459 | { |
a84ffe43 ACM |
460 | struct dccp_sock *dp; |
461 | int err; | |
462 | int val; | |
7c657876 | 463 | |
a84ffe43 ACM |
464 | if (optlen < sizeof(int)) |
465 | return -EINVAL; | |
466 | ||
467 | if (get_user(val, (int __user *)optval)) | |
468 | return -EFAULT; | |
469 | ||
67e6b629 ACM |
470 | if (optname == DCCP_SOCKOPT_SERVICE) |
471 | return dccp_setsockopt_service(sk, val, optval, optlen); | |
a84ffe43 | 472 | |
67e6b629 | 473 | lock_sock(sk); |
a84ffe43 ACM |
474 | dp = dccp_sk(sk); |
475 | err = 0; | |
476 | ||
477 | switch (optname) { | |
478 | case DCCP_SOCKOPT_PACKET_SIZE: | |
479 | dp->dccps_packet_size = val; | |
480 | break; | |
afe00251 AB |
481 | |
482 | case DCCP_SOCKOPT_CHANGE_L: | |
483 | if (optlen != sizeof(struct dccp_so_feat)) | |
484 | err = -EINVAL; | |
485 | else | |
486 | err = dccp_setsockopt_change(sk, DCCPO_CHANGE_L, | |
487 | (struct dccp_so_feat *) | |
488 | optval); | |
489 | break; | |
490 | ||
491 | case DCCP_SOCKOPT_CHANGE_R: | |
492 | if (optlen != sizeof(struct dccp_so_feat)) | |
493 | err = -EINVAL; | |
494 | else | |
495 | err = dccp_setsockopt_change(sk, DCCPO_CHANGE_R, | |
496 | (struct dccp_so_feat *) | |
497 | optval); | |
498 | break; | |
499 | ||
a84ffe43 ACM |
500 | default: |
501 | err = -ENOPROTOOPT; | |
502 | break; | |
503 | } | |
504 | ||
505 | release_sock(sk); | |
506 | return err; | |
7c657876 ACM |
507 | } |
508 | ||
3fdadf7d DM |
509 | int dccp_setsockopt(struct sock *sk, int level, int optname, |
510 | char __user *optval, int optlen) | |
511 | { | |
512 | if (level != SOL_DCCP) | |
513 | return inet_csk(sk)->icsk_af_ops->setsockopt(sk, level, | |
514 | optname, optval, | |
515 | optlen); | |
516 | return do_dccp_setsockopt(sk, level, optname, optval, optlen); | |
517 | } | |
543d9cfe | 518 | |
f21e68ca ACM |
519 | EXPORT_SYMBOL_GPL(dccp_setsockopt); |
520 | ||
3fdadf7d DM |
521 | #ifdef CONFIG_COMPAT |
522 | int compat_dccp_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 523 | char __user *optval, int optlen) |
3fdadf7d | 524 | { |
dec73ff0 ACM |
525 | if (level != SOL_DCCP) |
526 | return inet_csk_compat_setsockopt(sk, level, optname, | |
527 | optval, optlen); | |
3fdadf7d DM |
528 | return do_dccp_setsockopt(sk, level, optname, optval, optlen); |
529 | } | |
543d9cfe | 530 | |
3fdadf7d DM |
531 | EXPORT_SYMBOL_GPL(compat_dccp_setsockopt); |
532 | #endif | |
533 | ||
67e6b629 | 534 | static int dccp_getsockopt_service(struct sock *sk, int len, |
60fe62e7 | 535 | __be32 __user *optval, |
67e6b629 ACM |
536 | int __user *optlen) |
537 | { | |
538 | const struct dccp_sock *dp = dccp_sk(sk); | |
539 | const struct dccp_service_list *sl; | |
540 | int err = -ENOENT, slen = 0, total_len = sizeof(u32); | |
541 | ||
542 | lock_sock(sk); | |
543 | if (dccp_service_not_initialized(sk)) | |
544 | goto out; | |
545 | ||
546 | if ((sl = dp->dccps_service_list) != NULL) { | |
547 | slen = sl->dccpsl_nr * sizeof(u32); | |
548 | total_len += slen; | |
549 | } | |
550 | ||
551 | err = -EINVAL; | |
552 | if (total_len > len) | |
553 | goto out; | |
554 | ||
555 | err = 0; | |
556 | if (put_user(total_len, optlen) || | |
557 | put_user(dp->dccps_service, optval) || | |
558 | (sl != NULL && copy_to_user(optval + 1, sl->dccpsl_list, slen))) | |
559 | err = -EFAULT; | |
560 | out: | |
561 | release_sock(sk); | |
562 | return err; | |
563 | } | |
564 | ||
3fdadf7d | 565 | static int do_dccp_getsockopt(struct sock *sk, int level, int optname, |
a1d3a355 | 566 | char __user *optval, int __user *optlen) |
7c657876 | 567 | { |
a84ffe43 ACM |
568 | struct dccp_sock *dp; |
569 | int val, len; | |
7c657876 | 570 | |
a84ffe43 ACM |
571 | if (get_user(len, optlen)) |
572 | return -EFAULT; | |
573 | ||
88f964db | 574 | if (len < sizeof(int)) |
a84ffe43 ACM |
575 | return -EINVAL; |
576 | ||
577 | dp = dccp_sk(sk); | |
578 | ||
579 | switch (optname) { | |
580 | case DCCP_SOCKOPT_PACKET_SIZE: | |
581 | val = dp->dccps_packet_size; | |
88f964db | 582 | len = sizeof(dp->dccps_packet_size); |
a84ffe43 | 583 | break; |
88f964db ACM |
584 | case DCCP_SOCKOPT_SERVICE: |
585 | return dccp_getsockopt_service(sk, len, | |
60fe62e7 | 586 | (__be32 __user *)optval, optlen); |
88f964db ACM |
587 | case 128 ... 191: |
588 | return ccid_hc_rx_getsockopt(dp->dccps_hc_rx_ccid, sk, optname, | |
589 | len, (u32 __user *)optval, optlen); | |
590 | case 192 ... 255: | |
591 | return ccid_hc_tx_getsockopt(dp->dccps_hc_tx_ccid, sk, optname, | |
592 | len, (u32 __user *)optval, optlen); | |
a84ffe43 ACM |
593 | default: |
594 | return -ENOPROTOOPT; | |
595 | } | |
596 | ||
597 | if (put_user(len, optlen) || copy_to_user(optval, &val, len)) | |
598 | return -EFAULT; | |
599 | ||
600 | return 0; | |
7c657876 ACM |
601 | } |
602 | ||
3fdadf7d DM |
603 | int dccp_getsockopt(struct sock *sk, int level, int optname, |
604 | char __user *optval, int __user *optlen) | |
605 | { | |
606 | if (level != SOL_DCCP) | |
607 | return inet_csk(sk)->icsk_af_ops->getsockopt(sk, level, | |
608 | optname, optval, | |
609 | optlen); | |
610 | return do_dccp_getsockopt(sk, level, optname, optval, optlen); | |
611 | } | |
543d9cfe | 612 | |
f21e68ca ACM |
613 | EXPORT_SYMBOL_GPL(dccp_getsockopt); |
614 | ||
3fdadf7d DM |
615 | #ifdef CONFIG_COMPAT |
616 | int compat_dccp_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 617 | char __user *optval, int __user *optlen) |
3fdadf7d | 618 | { |
dec73ff0 ACM |
619 | if (level != SOL_DCCP) |
620 | return inet_csk_compat_getsockopt(sk, level, optname, | |
621 | optval, optlen); | |
3fdadf7d DM |
622 | return do_dccp_getsockopt(sk, level, optname, optval, optlen); |
623 | } | |
543d9cfe | 624 | |
3fdadf7d DM |
625 | EXPORT_SYMBOL_GPL(compat_dccp_getsockopt); |
626 | #endif | |
627 | ||
7c657876 ACM |
628 | int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, |
629 | size_t len) | |
630 | { | |
631 | const struct dccp_sock *dp = dccp_sk(sk); | |
632 | const int flags = msg->msg_flags; | |
633 | const int noblock = flags & MSG_DONTWAIT; | |
634 | struct sk_buff *skb; | |
635 | int rc, size; | |
636 | long timeo; | |
637 | ||
638 | if (len > dp->dccps_mss_cache) | |
639 | return -EMSGSIZE; | |
640 | ||
641 | lock_sock(sk); | |
27258ee5 | 642 | timeo = sock_sndtimeo(sk, noblock); |
7c657876 ACM |
643 | |
644 | /* | |
645 | * We have to use sk_stream_wait_connect here to set sk_write_pending, | |
646 | * so that the trick in dccp_rcv_request_sent_state_process. | |
647 | */ | |
648 | /* Wait for a connection to finish. */ | |
649 | if ((1 << sk->sk_state) & ~(DCCPF_OPEN | DCCPF_PARTOPEN | DCCPF_CLOSING)) | |
650 | if ((rc = sk_stream_wait_connect(sk, &timeo)) != 0) | |
27258ee5 | 651 | goto out_release; |
7c657876 ACM |
652 | |
653 | size = sk->sk_prot->max_header + len; | |
654 | release_sock(sk); | |
655 | skb = sock_alloc_send_skb(sk, size, noblock, &rc); | |
656 | lock_sock(sk); | |
7c657876 ACM |
657 | if (skb == NULL) |
658 | goto out_release; | |
659 | ||
660 | skb_reserve(skb, sk->sk_prot->max_header); | |
661 | rc = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len); | |
27258ee5 ACM |
662 | if (rc != 0) |
663 | goto out_discard; | |
664 | ||
d6809c12 | 665 | rc = dccp_write_xmit(sk, skb, &timeo); |
20472af9 ACM |
666 | /* |
667 | * XXX we don't use sk_write_queue, so just discard the packet. | |
668 | * Current plan however is to _use_ sk_write_queue with | |
669 | * an algorith similar to tcp_sendmsg, where the main difference | |
670 | * is that in DCCP we have to respect packet boundaries, so | |
671 | * no coalescing of skbs. | |
672 | * | |
673 | * This bug was _quickly_ found & fixed by just looking at an OSTRA | |
674 | * generated callgraph 8) -acme | |
675 | */ | |
7c657876 ACM |
676 | out_release: |
677 | release_sock(sk); | |
678 | return rc ? : len; | |
27258ee5 ACM |
679 | out_discard: |
680 | kfree_skb(skb); | |
7c657876 | 681 | goto out_release; |
7c657876 ACM |
682 | } |
683 | ||
f21e68ca ACM |
684 | EXPORT_SYMBOL_GPL(dccp_sendmsg); |
685 | ||
7c657876 ACM |
686 | int dccp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, |
687 | size_t len, int nonblock, int flags, int *addr_len) | |
688 | { | |
689 | const struct dccp_hdr *dh; | |
7c657876 ACM |
690 | long timeo; |
691 | ||
692 | lock_sock(sk); | |
693 | ||
531669a0 ACM |
694 | if (sk->sk_state == DCCP_LISTEN) { |
695 | len = -ENOTCONN; | |
7c657876 | 696 | goto out; |
7c657876 | 697 | } |
7c657876 | 698 | |
531669a0 | 699 | timeo = sock_rcvtimeo(sk, nonblock); |
7c657876 ACM |
700 | |
701 | do { | |
531669a0 | 702 | struct sk_buff *skb = skb_peek(&sk->sk_receive_queue); |
7c657876 | 703 | |
531669a0 ACM |
704 | if (skb == NULL) |
705 | goto verify_sock_status; | |
7c657876 | 706 | |
531669a0 | 707 | dh = dccp_hdr(skb); |
7c657876 | 708 | |
531669a0 ACM |
709 | if (dh->dccph_type == DCCP_PKT_DATA || |
710 | dh->dccph_type == DCCP_PKT_DATAACK) | |
711 | goto found_ok_skb; | |
7c657876 | 712 | |
531669a0 ACM |
713 | if (dh->dccph_type == DCCP_PKT_RESET || |
714 | dh->dccph_type == DCCP_PKT_CLOSE) { | |
715 | dccp_pr_debug("found fin ok!\n"); | |
716 | len = 0; | |
717 | goto found_fin_ok; | |
718 | } | |
719 | dccp_pr_debug("packet_type=%s\n", | |
720 | dccp_packet_name(dh->dccph_type)); | |
624d1164 | 721 | sk_eat_skb(sk, skb, 0); |
531669a0 ACM |
722 | verify_sock_status: |
723 | if (sock_flag(sk, SOCK_DONE)) { | |
724 | len = 0; | |
7c657876 | 725 | break; |
531669a0 | 726 | } |
7c657876 | 727 | |
531669a0 ACM |
728 | if (sk->sk_err) { |
729 | len = sock_error(sk); | |
730 | break; | |
731 | } | |
7c657876 | 732 | |
531669a0 ACM |
733 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
734 | len = 0; | |
735 | break; | |
736 | } | |
7c657876 | 737 | |
531669a0 ACM |
738 | if (sk->sk_state == DCCP_CLOSED) { |
739 | if (!sock_flag(sk, SOCK_DONE)) { | |
740 | /* This occurs when user tries to read | |
741 | * from never connected socket. | |
742 | */ | |
743 | len = -ENOTCONN; | |
7c657876 ACM |
744 | break; |
745 | } | |
531669a0 ACM |
746 | len = 0; |
747 | break; | |
7c657876 ACM |
748 | } |
749 | ||
531669a0 ACM |
750 | if (!timeo) { |
751 | len = -EAGAIN; | |
752 | break; | |
753 | } | |
7c657876 | 754 | |
531669a0 ACM |
755 | if (signal_pending(current)) { |
756 | len = sock_intr_errno(timeo); | |
757 | break; | |
758 | } | |
7c657876 | 759 | |
531669a0 | 760 | sk_wait_data(sk, &timeo); |
7c657876 | 761 | continue; |
7c657876 | 762 | found_ok_skb: |
531669a0 ACM |
763 | if (len > skb->len) |
764 | len = skb->len; | |
765 | else if (len < skb->len) | |
766 | msg->msg_flags |= MSG_TRUNC; | |
767 | ||
768 | if (skb_copy_datagram_iovec(skb, 0, msg->msg_iov, len)) { | |
769 | /* Exception. Bailout! */ | |
770 | len = -EFAULT; | |
771 | break; | |
7c657876 | 772 | } |
7c657876 ACM |
773 | found_fin_ok: |
774 | if (!(flags & MSG_PEEK)) | |
624d1164 | 775 | sk_eat_skb(sk, skb, 0); |
7c657876 | 776 | break; |
531669a0 | 777 | } while (1); |
7c657876 ACM |
778 | out: |
779 | release_sock(sk); | |
531669a0 | 780 | return len; |
7c657876 ACM |
781 | } |
782 | ||
f21e68ca ACM |
783 | EXPORT_SYMBOL_GPL(dccp_recvmsg); |
784 | ||
785 | int inet_dccp_listen(struct socket *sock, int backlog) | |
7c657876 ACM |
786 | { |
787 | struct sock *sk = sock->sk; | |
788 | unsigned char old_state; | |
789 | int err; | |
790 | ||
791 | lock_sock(sk); | |
792 | ||
793 | err = -EINVAL; | |
794 | if (sock->state != SS_UNCONNECTED || sock->type != SOCK_DCCP) | |
795 | goto out; | |
796 | ||
797 | old_state = sk->sk_state; | |
798 | if (!((1 << old_state) & (DCCPF_CLOSED | DCCPF_LISTEN))) | |
799 | goto out; | |
800 | ||
801 | /* Really, if the socket is already in listen state | |
802 | * we can only allow the backlog to be adjusted. | |
803 | */ | |
804 | if (old_state != DCCP_LISTEN) { | |
805 | /* | |
806 | * FIXME: here it probably should be sk->sk_prot->listen_start | |
807 | * see tcp_listen_start | |
808 | */ | |
809 | err = dccp_listen_start(sk); | |
810 | if (err) | |
811 | goto out; | |
812 | } | |
813 | sk->sk_max_ack_backlog = backlog; | |
814 | err = 0; | |
815 | ||
816 | out: | |
817 | release_sock(sk); | |
818 | return err; | |
819 | } | |
820 | ||
f21e68ca ACM |
821 | EXPORT_SYMBOL_GPL(inet_dccp_listen); |
822 | ||
7c657876 | 823 | static const unsigned char dccp_new_state[] = { |
7690af3f ACM |
824 | /* current state: new state: action: */ |
825 | [0] = DCCP_CLOSED, | |
826 | [DCCP_OPEN] = DCCP_CLOSING | DCCP_ACTION_FIN, | |
827 | [DCCP_REQUESTING] = DCCP_CLOSED, | |
828 | [DCCP_PARTOPEN] = DCCP_CLOSING | DCCP_ACTION_FIN, | |
829 | [DCCP_LISTEN] = DCCP_CLOSED, | |
830 | [DCCP_RESPOND] = DCCP_CLOSED, | |
831 | [DCCP_CLOSING] = DCCP_CLOSED, | |
832 | [DCCP_TIME_WAIT] = DCCP_CLOSED, | |
833 | [DCCP_CLOSED] = DCCP_CLOSED, | |
7c657876 ACM |
834 | }; |
835 | ||
836 | static int dccp_close_state(struct sock *sk) | |
837 | { | |
838 | const int next = dccp_new_state[sk->sk_state]; | |
839 | const int ns = next & DCCP_STATE_MASK; | |
840 | ||
841 | if (ns != sk->sk_state) | |
842 | dccp_set_state(sk, ns); | |
843 | ||
844 | return next & DCCP_ACTION_FIN; | |
845 | } | |
846 | ||
847 | void dccp_close(struct sock *sk, long timeout) | |
848 | { | |
849 | struct sk_buff *skb; | |
134af346 | 850 | int state; |
7c657876 ACM |
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: | |
134af346 HX |
885 | state = sk->sk_state; |
886 | sock_hold(sk); | |
887 | sock_orphan(sk); | |
888 | atomic_inc(sk->sk_prot->orphan_count); | |
889 | ||
7ad07e7c ACM |
890 | /* |
891 | * It is the last release_sock in its life. It will remove backlog. | |
892 | */ | |
7c657876 ACM |
893 | release_sock(sk); |
894 | /* | |
895 | * Now socket is owned by kernel and we acquire BH lock | |
896 | * to finish close. No need to check for user refs. | |
897 | */ | |
898 | local_bh_disable(); | |
899 | bh_lock_sock(sk); | |
900 | BUG_TRAP(!sock_owned_by_user(sk)); | |
901 | ||
134af346 HX |
902 | /* Have we already been destroyed by a softirq or backlog? */ |
903 | if (state != DCCP_CLOSED && sk->sk_state == DCCP_CLOSED) | |
904 | goto out; | |
7ad07e7c ACM |
905 | |
906 | /* | |
907 | * The last release_sock may have processed the CLOSE or RESET | |
908 | * packet moving sock to CLOSED state, if not we have to fire | |
909 | * the CLOSE/CLOSEREQ retransmission timer, see "8.3. Termination" | |
910 | * in draft-ietf-dccp-spec-11. -acme | |
911 | */ | |
912 | if (sk->sk_state == DCCP_CLOSING) { | |
913 | /* FIXME: should start at 2 * RTT */ | |
914 | /* Timer for repeating the CLOSE/CLOSEREQ until an answer. */ | |
915 | inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, | |
916 | inet_csk(sk)->icsk_rto, | |
917 | DCCP_RTO_MAX); | |
918 | #if 0 | |
919 | /* Yeah, we should use sk->sk_prot->orphan_count, etc */ | |
7c657876 | 920 | dccp_set_state(sk, DCCP_CLOSED); |
7ad07e7c ACM |
921 | #endif |
922 | } | |
7c657876 | 923 | |
7c657876 ACM |
924 | if (sk->sk_state == DCCP_CLOSED) |
925 | inet_csk_destroy_sock(sk); | |
926 | ||
927 | /* Otherwise, socket is reprieved until protocol close. */ | |
928 | ||
134af346 | 929 | out: |
7c657876 ACM |
930 | bh_unlock_sock(sk); |
931 | local_bh_enable(); | |
932 | sock_put(sk); | |
933 | } | |
934 | ||
f21e68ca ACM |
935 | EXPORT_SYMBOL_GPL(dccp_close); |
936 | ||
7c657876 ACM |
937 | void dccp_shutdown(struct sock *sk, int how) |
938 | { | |
939 | dccp_pr_debug("entry\n"); | |
940 | } | |
941 | ||
f21e68ca ACM |
942 | EXPORT_SYMBOL_GPL(dccp_shutdown); |
943 | ||
46f09ffa | 944 | static int __init dccp_mib_init(void) |
7c657876 ACM |
945 | { |
946 | int rc = -ENOMEM; | |
947 | ||
948 | dccp_statistics[0] = alloc_percpu(struct dccp_mib); | |
949 | if (dccp_statistics[0] == NULL) | |
950 | goto out; | |
951 | ||
952 | dccp_statistics[1] = alloc_percpu(struct dccp_mib); | |
953 | if (dccp_statistics[1] == NULL) | |
954 | goto out_free_one; | |
955 | ||
956 | rc = 0; | |
957 | out: | |
958 | return rc; | |
959 | out_free_one: | |
960 | free_percpu(dccp_statistics[0]); | |
961 | dccp_statistics[0] = NULL; | |
962 | goto out; | |
963 | ||
964 | } | |
965 | ||
b61fafc4 | 966 | static void dccp_mib_exit(void) |
46f09ffa ACM |
967 | { |
968 | free_percpu(dccp_statistics[0]); | |
969 | free_percpu(dccp_statistics[1]); | |
970 | dccp_statistics[0] = dccp_statistics[1] = NULL; | |
971 | } | |
972 | ||
7c657876 ACM |
973 | static int thash_entries; |
974 | module_param(thash_entries, int, 0444); | |
975 | MODULE_PARM_DESC(thash_entries, "Number of ehash buckets"); | |
976 | ||
a1d3a355 | 977 | #ifdef CONFIG_IP_DCCP_DEBUG |
7c657876 ACM |
978 | int dccp_debug; |
979 | module_param(dccp_debug, int, 0444); | |
980 | MODULE_PARM_DESC(dccp_debug, "Enable debug messages"); | |
f21e68ca ACM |
981 | |
982 | EXPORT_SYMBOL_GPL(dccp_debug); | |
a1d3a355 | 983 | #endif |
7c657876 ACM |
984 | |
985 | static int __init dccp_init(void) | |
986 | { | |
987 | unsigned long goal; | |
988 | int ehash_order, bhash_order, i; | |
b61fafc4 | 989 | int rc = -ENOBUFS; |
7c657876 | 990 | |
7690af3f ACM |
991 | dccp_hashinfo.bind_bucket_cachep = |
992 | kmem_cache_create("dccp_bind_bucket", | |
993 | sizeof(struct inet_bind_bucket), 0, | |
994 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
7c657876 | 995 | if (!dccp_hashinfo.bind_bucket_cachep) |
b61fafc4 | 996 | goto out; |
7c657876 ACM |
997 | |
998 | /* | |
999 | * Size and allocate the main established and bind bucket | |
1000 | * hash tables. | |
1001 | * | |
1002 | * The methodology is similar to that of the buffer cache. | |
1003 | */ | |
1004 | if (num_physpages >= (128 * 1024)) | |
1005 | goal = num_physpages >> (21 - PAGE_SHIFT); | |
1006 | else | |
1007 | goal = num_physpages >> (23 - PAGE_SHIFT); | |
1008 | ||
1009 | if (thash_entries) | |
7690af3f ACM |
1010 | goal = (thash_entries * |
1011 | sizeof(struct inet_ehash_bucket)) >> PAGE_SHIFT; | |
7c657876 ACM |
1012 | for (ehash_order = 0; (1UL << ehash_order) < goal; ehash_order++) |
1013 | ; | |
1014 | do { | |
1015 | dccp_hashinfo.ehash_size = (1UL << ehash_order) * PAGE_SIZE / | |
1016 | sizeof(struct inet_ehash_bucket); | |
1017 | dccp_hashinfo.ehash_size >>= 1; | |
7690af3f ACM |
1018 | while (dccp_hashinfo.ehash_size & |
1019 | (dccp_hashinfo.ehash_size - 1)) | |
7c657876 ACM |
1020 | dccp_hashinfo.ehash_size--; |
1021 | dccp_hashinfo.ehash = (struct inet_ehash_bucket *) | |
1022 | __get_free_pages(GFP_ATOMIC, ehash_order); | |
1023 | } while (!dccp_hashinfo.ehash && --ehash_order > 0); | |
1024 | ||
1025 | if (!dccp_hashinfo.ehash) { | |
1026 | printk(KERN_CRIT "Failed to allocate DCCP " | |
1027 | "established hash table\n"); | |
1028 | goto out_free_bind_bucket_cachep; | |
1029 | } | |
1030 | ||
1031 | for (i = 0; i < (dccp_hashinfo.ehash_size << 1); i++) { | |
1032 | rwlock_init(&dccp_hashinfo.ehash[i].lock); | |
1033 | INIT_HLIST_HEAD(&dccp_hashinfo.ehash[i].chain); | |
1034 | } | |
1035 | ||
1036 | bhash_order = ehash_order; | |
1037 | ||
1038 | do { | |
1039 | dccp_hashinfo.bhash_size = (1UL << bhash_order) * PAGE_SIZE / | |
1040 | sizeof(struct inet_bind_hashbucket); | |
7690af3f ACM |
1041 | if ((dccp_hashinfo.bhash_size > (64 * 1024)) && |
1042 | bhash_order > 0) | |
7c657876 ACM |
1043 | continue; |
1044 | dccp_hashinfo.bhash = (struct inet_bind_hashbucket *) | |
1045 | __get_free_pages(GFP_ATOMIC, bhash_order); | |
1046 | } while (!dccp_hashinfo.bhash && --bhash_order >= 0); | |
1047 | ||
1048 | if (!dccp_hashinfo.bhash) { | |
1049 | printk(KERN_CRIT "Failed to allocate DCCP bind hash table\n"); | |
1050 | goto out_free_dccp_ehash; | |
1051 | } | |
1052 | ||
1053 | for (i = 0; i < dccp_hashinfo.bhash_size; i++) { | |
1054 | spin_lock_init(&dccp_hashinfo.bhash[i].lock); | |
1055 | INIT_HLIST_HEAD(&dccp_hashinfo.bhash[i].chain); | |
1056 | } | |
1057 | ||
46f09ffa | 1058 | rc = dccp_mib_init(); |
fa23e2ec | 1059 | if (rc) |
7c657876 ACM |
1060 | goto out_free_dccp_bhash; |
1061 | ||
9b07ef5d | 1062 | rc = dccp_ackvec_init(); |
7c657876 | 1063 | if (rc) |
b61fafc4 | 1064 | goto out_free_dccp_mib; |
9b07ef5d | 1065 | |
e55d912f | 1066 | rc = dccp_sysctl_init(); |
9b07ef5d ACM |
1067 | if (rc) |
1068 | goto out_ackvec_exit; | |
7c657876 ACM |
1069 | out: |
1070 | return rc; | |
9b07ef5d ACM |
1071 | out_ackvec_exit: |
1072 | dccp_ackvec_exit(); | |
b61fafc4 | 1073 | out_free_dccp_mib: |
46f09ffa | 1074 | dccp_mib_exit(); |
7c657876 ACM |
1075 | out_free_dccp_bhash: |
1076 | free_pages((unsigned long)dccp_hashinfo.bhash, bhash_order); | |
1077 | dccp_hashinfo.bhash = NULL; | |
1078 | out_free_dccp_ehash: | |
1079 | free_pages((unsigned long)dccp_hashinfo.ehash, ehash_order); | |
1080 | dccp_hashinfo.ehash = NULL; | |
1081 | out_free_bind_bucket_cachep: | |
1082 | kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); | |
1083 | dccp_hashinfo.bind_bucket_cachep = NULL; | |
7c657876 ACM |
1084 | goto out; |
1085 | } | |
1086 | ||
7c657876 ACM |
1087 | static void __exit dccp_fini(void) |
1088 | { | |
46f09ffa | 1089 | dccp_mib_exit(); |
725ba8ee ACM |
1090 | free_pages((unsigned long)dccp_hashinfo.bhash, |
1091 | get_order(dccp_hashinfo.bhash_size * | |
1092 | sizeof(struct inet_bind_hashbucket))); | |
1093 | free_pages((unsigned long)dccp_hashinfo.ehash, | |
1094 | get_order(dccp_hashinfo.ehash_size * | |
1095 | sizeof(struct inet_ehash_bucket))); | |
7c657876 | 1096 | kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); |
9b07ef5d | 1097 | dccp_ackvec_exit(); |
e55d912f | 1098 | dccp_sysctl_exit(); |
7c657876 ACM |
1099 | } |
1100 | ||
1101 | module_init(dccp_init); | |
1102 | module_exit(dccp_fini); | |
1103 | ||
7c657876 ACM |
1104 | MODULE_LICENSE("GPL"); |
1105 | MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@conectiva.com.br>"); | |
1106 | MODULE_DESCRIPTION("DCCP - Datagram Congestion Controlled Protocol"); |