Commit | Line | Data |
---|---|---|
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 | ||
b1308dc0 IM |
55 | /* the maximum queue length for tx in packets. 0 is no limit */ |
56 | int sysctl_dccp_tx_qlen __read_mostly = 5; | |
57 | ||
c25a18ba ACM |
58 | void dccp_set_state(struct sock *sk, const int state) |
59 | { | |
60 | const int oldstate = sk->sk_state; | |
61 | ||
62 | dccp_pr_debug("%s(%p) %-10.10s -> %s\n", | |
63 | dccp_role(sk), sk, | |
64 | dccp_state_name(oldstate), dccp_state_name(state)); | |
65 | WARN_ON(state == oldstate); | |
66 | ||
67 | switch (state) { | |
68 | case DCCP_OPEN: | |
69 | if (oldstate != DCCP_OPEN) | |
70 | DCCP_INC_STATS(DCCP_MIB_CURRESTAB); | |
71 | break; | |
72 | ||
73 | case DCCP_CLOSED: | |
74 | if (oldstate == DCCP_CLOSING || oldstate == DCCP_OPEN) | |
75 | DCCP_INC_STATS(DCCP_MIB_ESTABRESETS); | |
76 | ||
77 | sk->sk_prot->unhash(sk); | |
78 | if (inet_csk(sk)->icsk_bind_hash != NULL && | |
79 | !(sk->sk_userlocks & SOCK_BINDPORT_LOCK)) | |
80 | inet_put_port(&dccp_hashinfo, sk); | |
81 | /* fall through */ | |
82 | default: | |
83 | if (oldstate == DCCP_OPEN) | |
84 | DCCP_DEC_STATS(DCCP_MIB_CURRESTAB); | |
85 | } | |
86 | ||
87 | /* Change state AFTER socket is unhashed to avoid closed | |
88 | * socket sitting in hash tables. | |
89 | */ | |
90 | sk->sk_state = state; | |
91 | } | |
92 | ||
93 | EXPORT_SYMBOL_GPL(dccp_set_state); | |
94 | ||
95 | void dccp_done(struct sock *sk) | |
96 | { | |
97 | dccp_set_state(sk, DCCP_CLOSED); | |
98 | dccp_clear_xmit_timers(sk); | |
99 | ||
100 | sk->sk_shutdown = SHUTDOWN_MASK; | |
101 | ||
102 | if (!sock_flag(sk, SOCK_DEAD)) | |
103 | sk->sk_state_change(sk); | |
104 | else | |
105 | inet_csk_destroy_sock(sk); | |
106 | } | |
107 | ||
108 | EXPORT_SYMBOL_GPL(dccp_done); | |
109 | ||
7c657876 ACM |
110 | const char *dccp_packet_name(const int type) |
111 | { | |
112 | static const char *dccp_packet_names[] = { | |
113 | [DCCP_PKT_REQUEST] = "REQUEST", | |
114 | [DCCP_PKT_RESPONSE] = "RESPONSE", | |
115 | [DCCP_PKT_DATA] = "DATA", | |
116 | [DCCP_PKT_ACK] = "ACK", | |
117 | [DCCP_PKT_DATAACK] = "DATAACK", | |
118 | [DCCP_PKT_CLOSEREQ] = "CLOSEREQ", | |
119 | [DCCP_PKT_CLOSE] = "CLOSE", | |
120 | [DCCP_PKT_RESET] = "RESET", | |
121 | [DCCP_PKT_SYNC] = "SYNC", | |
122 | [DCCP_PKT_SYNCACK] = "SYNCACK", | |
123 | }; | |
124 | ||
125 | if (type >= DCCP_NR_PKT_TYPES) | |
126 | return "INVALID"; | |
127 | else | |
128 | return dccp_packet_names[type]; | |
129 | } | |
130 | ||
131 | EXPORT_SYMBOL_GPL(dccp_packet_name); | |
132 | ||
133 | const char *dccp_state_name(const int state) | |
134 | { | |
135 | static char *dccp_state_names[] = { | |
136 | [DCCP_OPEN] = "OPEN", | |
137 | [DCCP_REQUESTING] = "REQUESTING", | |
138 | [DCCP_PARTOPEN] = "PARTOPEN", | |
139 | [DCCP_LISTEN] = "LISTEN", | |
140 | [DCCP_RESPOND] = "RESPOND", | |
141 | [DCCP_CLOSING] = "CLOSING", | |
142 | [DCCP_TIME_WAIT] = "TIME_WAIT", | |
143 | [DCCP_CLOSED] = "CLOSED", | |
144 | }; | |
145 | ||
146 | if (state >= DCCP_MAX_STATES) | |
147 | return "INVALID STATE!"; | |
148 | else | |
149 | return dccp_state_names[state]; | |
150 | } | |
151 | ||
152 | EXPORT_SYMBOL_GPL(dccp_state_name); | |
153 | ||
c985ed70 ACM |
154 | void dccp_hash(struct sock *sk) |
155 | { | |
156 | inet_hash(&dccp_hashinfo, sk); | |
157 | } | |
158 | ||
159 | EXPORT_SYMBOL_GPL(dccp_hash); | |
160 | ||
161 | void dccp_unhash(struct sock *sk) | |
162 | { | |
163 | inet_unhash(&dccp_hashinfo, sk); | |
164 | } | |
165 | ||
166 | EXPORT_SYMBOL_GPL(dccp_unhash); | |
167 | ||
72478873 | 168 | int dccp_init_sock(struct sock *sk, const __u8 ctl_sock_initialized) |
3e0fadc5 ACM |
169 | { |
170 | struct dccp_sock *dp = dccp_sk(sk); | |
a4bf3902 | 171 | struct dccp_minisock *dmsk = dccp_msk(sk); |
3e0fadc5 | 172 | struct inet_connection_sock *icsk = inet_csk(sk); |
3e0fadc5 | 173 | |
a4bf3902 | 174 | dccp_minisock_init(&dp->dccps_minisock); |
3e0fadc5 ACM |
175 | |
176 | /* | |
177 | * FIXME: We're hardcoding the CCID, and doing this at this point makes | |
178 | * the listening (master) sock get CCID control blocks, which is not | |
179 | * necessary, but for now, to not mess with the test userspace apps, | |
180 | * lets leave it here, later the real solution is to do this in a | |
181 | * setsockopt(CCIDs-I-want/accept). -acme | |
182 | */ | |
72478873 | 183 | if (likely(ctl_sock_initialized)) { |
8ca0d17b | 184 | int rc = dccp_feat_init(dmsk); |
3e0fadc5 ACM |
185 | |
186 | if (rc) | |
187 | return rc; | |
188 | ||
a4bf3902 | 189 | if (dmsk->dccpms_send_ack_vector) { |
3e0fadc5 ACM |
190 | dp->dccps_hc_rx_ackvec = dccp_ackvec_alloc(GFP_KERNEL); |
191 | if (dp->dccps_hc_rx_ackvec == NULL) | |
192 | return -ENOMEM; | |
193 | } | |
a4bf3902 ACM |
194 | dp->dccps_hc_rx_ccid = ccid_hc_rx_new(dmsk->dccpms_rx_ccid, |
195 | sk, GFP_KERNEL); | |
196 | dp->dccps_hc_tx_ccid = ccid_hc_tx_new(dmsk->dccpms_tx_ccid, | |
197 | sk, GFP_KERNEL); | |
8109b02b | 198 | if (unlikely(dp->dccps_hc_rx_ccid == NULL || |
3e0fadc5 ACM |
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); | |
a4bf3902 | 202 | if (dmsk->dccpms_send_ack_vector) { |
3e0fadc5 ACM |
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 */ | |
a4bf3902 ACM |
211 | INIT_LIST_HEAD(&dmsk->dccpms_pending); |
212 | INIT_LIST_HEAD(&dmsk->dccpms_conf); | |
3e0fadc5 ACM |
213 | } |
214 | ||
215 | dccp_init_xmit_timers(sk); | |
216 | icsk->icsk_rto = DCCP_TIMEOUT_INIT; | |
2e2e9e92 | 217 | icsk->icsk_syn_retries = sysctl_dccp_request_retries; |
3e0fadc5 ACM |
218 | sk->sk_state = DCCP_CLOSED; |
219 | sk->sk_write_space = dccp_write_space; | |
220 | icsk->icsk_sync_mss = dccp_sync_mss; | |
221 | dp->dccps_mss_cache = 536; | |
a94f0f97 | 222 | dp->dccps_rate_last = jiffies; |
3e0fadc5 | 223 | dp->dccps_role = DCCP_ROLE_UNDEFINED; |
00e4d116 | 224 | dp->dccps_service = DCCP_SERVICE_CODE_IS_ABSENT; |
3e0fadc5 ACM |
225 | dp->dccps_l_ack_ratio = dp->dccps_r_ack_ratio = 1; |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
230 | EXPORT_SYMBOL_GPL(dccp_init_sock); | |
231 | ||
232 | int dccp_destroy_sock(struct sock *sk) | |
233 | { | |
234 | struct dccp_sock *dp = dccp_sk(sk); | |
8ca0d17b | 235 | struct dccp_minisock *dmsk = dccp_msk(sk); |
3e0fadc5 ACM |
236 | |
237 | /* | |
238 | * DCCP doesn't use sk_write_queue, just sk_send_head | |
239 | * for retransmissions | |
240 | */ | |
241 | if (sk->sk_send_head != NULL) { | |
242 | kfree_skb(sk->sk_send_head); | |
243 | sk->sk_send_head = NULL; | |
244 | } | |
245 | ||
246 | /* Clean up a referenced DCCP bind bucket. */ | |
247 | if (inet_csk(sk)->icsk_bind_hash != NULL) | |
248 | inet_put_port(&dccp_hashinfo, sk); | |
249 | ||
250 | kfree(dp->dccps_service_list); | |
251 | dp->dccps_service_list = NULL; | |
252 | ||
8ca0d17b | 253 | if (dmsk->dccpms_send_ack_vector) { |
3e0fadc5 ACM |
254 | dccp_ackvec_free(dp->dccps_hc_rx_ackvec); |
255 | dp->dccps_hc_rx_ackvec = NULL; | |
256 | } | |
257 | ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk); | |
258 | ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk); | |
259 | dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL; | |
260 | ||
261 | /* clean up feature negotiation state */ | |
8ca0d17b | 262 | dccp_feat_clean(dmsk); |
3e0fadc5 ACM |
263 | |
264 | return 0; | |
265 | } | |
266 | ||
267 | EXPORT_SYMBOL_GPL(dccp_destroy_sock); | |
268 | ||
72a3effa | 269 | static inline int dccp_listen_start(struct sock *sk, int backlog) |
7c657876 | 270 | { |
67e6b629 ACM |
271 | struct dccp_sock *dp = dccp_sk(sk); |
272 | ||
273 | dp->dccps_role = DCCP_ROLE_LISTEN; | |
72a3effa | 274 | return inet_csk_listen_start(sk, backlog); |
7c657876 ACM |
275 | } |
276 | ||
277 | int dccp_disconnect(struct sock *sk, int flags) | |
278 | { | |
279 | struct inet_connection_sock *icsk = inet_csk(sk); | |
280 | struct inet_sock *inet = inet_sk(sk); | |
281 | int err = 0; | |
282 | const int old_state = sk->sk_state; | |
283 | ||
284 | if (old_state != DCCP_CLOSED) | |
285 | dccp_set_state(sk, DCCP_CLOSED); | |
286 | ||
287 | /* ABORT function of RFC793 */ | |
288 | if (old_state == DCCP_LISTEN) { | |
289 | inet_csk_listen_stop(sk); | |
290 | /* FIXME: do the active reset thing */ | |
291 | } else if (old_state == DCCP_REQUESTING) | |
292 | sk->sk_err = ECONNRESET; | |
293 | ||
294 | dccp_clear_xmit_timers(sk); | |
295 | __skb_queue_purge(&sk->sk_receive_queue); | |
296 | if (sk->sk_send_head != NULL) { | |
297 | __kfree_skb(sk->sk_send_head); | |
298 | sk->sk_send_head = NULL; | |
299 | } | |
300 | ||
301 | inet->dport = 0; | |
302 | ||
303 | if (!(sk->sk_userlocks & SOCK_BINDADDR_LOCK)) | |
304 | inet_reset_saddr(sk); | |
305 | ||
306 | sk->sk_shutdown = 0; | |
307 | sock_reset_flag(sk, SOCK_DONE); | |
308 | ||
309 | icsk->icsk_backoff = 0; | |
310 | inet_csk_delack_init(sk); | |
311 | __sk_dst_reset(sk); | |
312 | ||
313 | BUG_TRAP(!inet->num || icsk->icsk_bind_hash); | |
314 | ||
315 | sk->sk_error_report(sk); | |
316 | return err; | |
317 | } | |
318 | ||
f21e68ca ACM |
319 | EXPORT_SYMBOL_GPL(dccp_disconnect); |
320 | ||
331968bd ACM |
321 | /* |
322 | * Wait for a DCCP event. | |
323 | * | |
324 | * Note that we don't need to lock the socket, as the upper poll layers | |
325 | * take care of normal races (between the test and the event) and we don't | |
326 | * go look at any of the socket buffers directly. | |
327 | */ | |
f21e68ca ACM |
328 | unsigned int dccp_poll(struct file *file, struct socket *sock, |
329 | poll_table *wait) | |
331968bd ACM |
330 | { |
331 | unsigned int mask; | |
332 | struct sock *sk = sock->sk; | |
333 | ||
334 | poll_wait(file, sk->sk_sleep, wait); | |
335 | if (sk->sk_state == DCCP_LISTEN) | |
336 | return inet_csk_listen_poll(sk); | |
337 | ||
338 | /* Socket is not locked. We are protected from async events | |
339 | by poll logic and correct handling of state changes | |
340 | made by another threads is impossible in any case. | |
341 | */ | |
342 | ||
343 | mask = 0; | |
344 | if (sk->sk_err) | |
345 | mask = POLLERR; | |
346 | ||
347 | if (sk->sk_shutdown == SHUTDOWN_MASK || sk->sk_state == DCCP_CLOSED) | |
348 | mask |= POLLHUP; | |
349 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
f348d70a | 350 | mask |= POLLIN | POLLRDNORM | POLLRDHUP; |
331968bd ACM |
351 | |
352 | /* Connected? */ | |
353 | if ((1 << sk->sk_state) & ~(DCCPF_REQUESTING | DCCPF_RESPOND)) { | |
354 | if (atomic_read(&sk->sk_rmem_alloc) > 0) | |
355 | mask |= POLLIN | POLLRDNORM; | |
356 | ||
357 | if (!(sk->sk_shutdown & SEND_SHUTDOWN)) { | |
358 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) { | |
359 | mask |= POLLOUT | POLLWRNORM; | |
360 | } else { /* send SIGIO later */ | |
361 | set_bit(SOCK_ASYNC_NOSPACE, | |
362 | &sk->sk_socket->flags); | |
363 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); | |
364 | ||
365 | /* Race breaker. If space is freed after | |
366 | * wspace test but before the flags are set, | |
367 | * IO signal will be lost. | |
368 | */ | |
369 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) | |
370 | mask |= POLLOUT | POLLWRNORM; | |
371 | } | |
372 | } | |
373 | } | |
374 | return mask; | |
375 | } | |
376 | ||
f21e68ca ACM |
377 | EXPORT_SYMBOL_GPL(dccp_poll); |
378 | ||
7c657876 ACM |
379 | int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg) |
380 | { | |
381 | dccp_pr_debug("entry\n"); | |
382 | return -ENOIOCTLCMD; | |
383 | } | |
384 | ||
f21e68ca ACM |
385 | EXPORT_SYMBOL_GPL(dccp_ioctl); |
386 | ||
60fe62e7 | 387 | static int dccp_setsockopt_service(struct sock *sk, const __be32 service, |
67e6b629 ACM |
388 | char __user *optval, int optlen) |
389 | { | |
390 | struct dccp_sock *dp = dccp_sk(sk); | |
391 | struct dccp_service_list *sl = NULL; | |
392 | ||
8109b02b | 393 | if (service == DCCP_SERVICE_INVALID_VALUE || |
67e6b629 ACM |
394 | optlen > DCCP_SERVICE_LIST_MAX_LEN * sizeof(u32)) |
395 | return -EINVAL; | |
396 | ||
397 | if (optlen > sizeof(service)) { | |
398 | sl = kmalloc(optlen, GFP_KERNEL); | |
399 | if (sl == NULL) | |
400 | return -ENOMEM; | |
401 | ||
402 | sl->dccpsl_nr = optlen / sizeof(u32) - 1; | |
403 | if (copy_from_user(sl->dccpsl_list, | |
404 | optval + sizeof(service), | |
405 | optlen - sizeof(service)) || | |
406 | dccp_list_has_service(sl, DCCP_SERVICE_INVALID_VALUE)) { | |
407 | kfree(sl); | |
408 | return -EFAULT; | |
409 | } | |
410 | } | |
411 | ||
412 | lock_sock(sk); | |
413 | dp->dccps_service = service; | |
414 | ||
a51482bd | 415 | kfree(dp->dccps_service_list); |
67e6b629 ACM |
416 | |
417 | dp->dccps_service_list = sl; | |
418 | release_sock(sk); | |
419 | return 0; | |
420 | } | |
421 | ||
afe00251 AB |
422 | /* byte 1 is feature. the rest is the preference list */ |
423 | static int dccp_setsockopt_change(struct sock *sk, int type, | |
424 | struct dccp_so_feat __user *optval) | |
425 | { | |
426 | struct dccp_so_feat opt; | |
427 | u8 *val; | |
428 | int rc; | |
429 | ||
430 | if (copy_from_user(&opt, optval, sizeof(opt))) | |
431 | return -EFAULT; | |
432 | ||
433 | val = kmalloc(opt.dccpsf_len, GFP_KERNEL); | |
434 | if (!val) | |
435 | return -ENOMEM; | |
436 | ||
437 | if (copy_from_user(val, opt.dccpsf_val, opt.dccpsf_len)) { | |
438 | rc = -EFAULT; | |
439 | goto out_free_val; | |
440 | } | |
441 | ||
8ca0d17b ACM |
442 | rc = dccp_feat_change(dccp_msk(sk), type, opt.dccpsf_feat, |
443 | val, opt.dccpsf_len, GFP_KERNEL); | |
afe00251 AB |
444 | if (rc) |
445 | goto out_free_val; | |
446 | ||
447 | out: | |
448 | return rc; | |
449 | ||
450 | out_free_val: | |
451 | kfree(val); | |
452 | goto out; | |
453 | } | |
454 | ||
3fdadf7d DM |
455 | static int do_dccp_setsockopt(struct sock *sk, int level, int optname, |
456 | char __user *optval, int optlen) | |
7c657876 | 457 | { |
09dbc389 GR |
458 | struct dccp_sock *dp = dccp_sk(sk); |
459 | int val, err = 0; | |
7c657876 | 460 | |
a84ffe43 ACM |
461 | if (optlen < sizeof(int)) |
462 | return -EINVAL; | |
463 | ||
464 | if (get_user(val, (int __user *)optval)) | |
465 | return -EFAULT; | |
466 | ||
67e6b629 ACM |
467 | if (optname == DCCP_SOCKOPT_SERVICE) |
468 | return dccp_setsockopt_service(sk, val, optval, optlen); | |
a84ffe43 | 469 | |
67e6b629 | 470 | lock_sock(sk); |
a84ffe43 ACM |
471 | switch (optname) { |
472 | case DCCP_SOCKOPT_PACKET_SIZE: | |
5aed3243 | 473 | DCCP_WARN("sockopt(PACKET_SIZE) is deprecated: fix your app\n"); |
841bac1d | 474 | err = 0; |
a84ffe43 | 475 | break; |
afe00251 AB |
476 | case DCCP_SOCKOPT_CHANGE_L: |
477 | if (optlen != sizeof(struct dccp_so_feat)) | |
478 | err = -EINVAL; | |
479 | else | |
480 | err = dccp_setsockopt_change(sk, DCCPO_CHANGE_L, | |
c9eaf173 | 481 | (struct dccp_so_feat __user *) |
afe00251 AB |
482 | optval); |
483 | break; | |
afe00251 AB |
484 | case DCCP_SOCKOPT_CHANGE_R: |
485 | if (optlen != sizeof(struct dccp_so_feat)) | |
486 | err = -EINVAL; | |
487 | else | |
488 | err = dccp_setsockopt_change(sk, DCCPO_CHANGE_R, | |
9faefb6d | 489 | (struct dccp_so_feat __user *) |
afe00251 AB |
490 | optval); |
491 | break; | |
6f4e5fff GR |
492 | case DCCP_SOCKOPT_SEND_CSCOV: /* sender side, RFC 4340, sec. 9.2 */ |
493 | if (val < 0 || val > 15) | |
494 | err = -EINVAL; | |
495 | else | |
496 | dp->dccps_pcslen = val; | |
497 | break; | |
498 | case DCCP_SOCKOPT_RECV_CSCOV: /* receiver side, RFC 4340 sec. 9.2.1 */ | |
499 | if (val < 0 || val > 15) | |
500 | err = -EINVAL; | |
501 | else { | |
502 | dp->dccps_pcrlen = val; | |
503 | /* FIXME: add feature negotiation, | |
504 | * ChangeL(MinimumChecksumCoverage, val) */ | |
505 | } | |
506 | break; | |
a84ffe43 ACM |
507 | default: |
508 | err = -ENOPROTOOPT; | |
509 | break; | |
510 | } | |
6f4e5fff | 511 | |
a84ffe43 ACM |
512 | release_sock(sk); |
513 | return err; | |
7c657876 ACM |
514 | } |
515 | ||
3fdadf7d DM |
516 | int dccp_setsockopt(struct sock *sk, int level, int optname, |
517 | char __user *optval, int optlen) | |
518 | { | |
519 | if (level != SOL_DCCP) | |
520 | return inet_csk(sk)->icsk_af_ops->setsockopt(sk, level, | |
521 | optname, optval, | |
522 | optlen); | |
523 | return do_dccp_setsockopt(sk, level, optname, optval, optlen); | |
524 | } | |
543d9cfe | 525 | |
f21e68ca ACM |
526 | EXPORT_SYMBOL_GPL(dccp_setsockopt); |
527 | ||
3fdadf7d DM |
528 | #ifdef CONFIG_COMPAT |
529 | int compat_dccp_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 530 | char __user *optval, int optlen) |
3fdadf7d | 531 | { |
dec73ff0 ACM |
532 | if (level != SOL_DCCP) |
533 | return inet_csk_compat_setsockopt(sk, level, optname, | |
534 | optval, optlen); | |
3fdadf7d DM |
535 | return do_dccp_setsockopt(sk, level, optname, optval, optlen); |
536 | } | |
543d9cfe | 537 | |
3fdadf7d DM |
538 | EXPORT_SYMBOL_GPL(compat_dccp_setsockopt); |
539 | #endif | |
540 | ||
67e6b629 | 541 | static int dccp_getsockopt_service(struct sock *sk, int len, |
60fe62e7 | 542 | __be32 __user *optval, |
67e6b629 ACM |
543 | int __user *optlen) |
544 | { | |
545 | const struct dccp_sock *dp = dccp_sk(sk); | |
546 | const struct dccp_service_list *sl; | |
547 | int err = -ENOENT, slen = 0, total_len = sizeof(u32); | |
548 | ||
549 | lock_sock(sk); | |
67e6b629 ACM |
550 | if ((sl = dp->dccps_service_list) != NULL) { |
551 | slen = sl->dccpsl_nr * sizeof(u32); | |
552 | total_len += slen; | |
553 | } | |
554 | ||
555 | err = -EINVAL; | |
556 | if (total_len > len) | |
557 | goto out; | |
558 | ||
559 | err = 0; | |
560 | if (put_user(total_len, optlen) || | |
561 | put_user(dp->dccps_service, optval) || | |
562 | (sl != NULL && copy_to_user(optval + 1, sl->dccpsl_list, slen))) | |
563 | err = -EFAULT; | |
564 | out: | |
565 | release_sock(sk); | |
566 | return err; | |
567 | } | |
568 | ||
3fdadf7d | 569 | static int do_dccp_getsockopt(struct sock *sk, int level, int optname, |
a1d3a355 | 570 | char __user *optval, int __user *optlen) |
7c657876 | 571 | { |
a84ffe43 ACM |
572 | struct dccp_sock *dp; |
573 | int val, len; | |
7c657876 | 574 | |
a84ffe43 ACM |
575 | if (get_user(len, optlen)) |
576 | return -EFAULT; | |
577 | ||
39ebc027 | 578 | if (len < (int)sizeof(int)) |
a84ffe43 ACM |
579 | return -EINVAL; |
580 | ||
581 | dp = dccp_sk(sk); | |
582 | ||
583 | switch (optname) { | |
584 | case DCCP_SOCKOPT_PACKET_SIZE: | |
5aed3243 | 585 | DCCP_WARN("sockopt(PACKET_SIZE) is deprecated: fix your app\n"); |
841bac1d | 586 | return 0; |
88f964db ACM |
587 | case DCCP_SOCKOPT_SERVICE: |
588 | return dccp_getsockopt_service(sk, len, | |
60fe62e7 | 589 | (__be32 __user *)optval, optlen); |
7c559a9e GR |
590 | case DCCP_SOCKOPT_GET_CUR_MPS: |
591 | val = dp->dccps_mss_cache; | |
592 | len = sizeof(val); | |
593 | break; | |
6f4e5fff GR |
594 | case DCCP_SOCKOPT_SEND_CSCOV: |
595 | val = dp->dccps_pcslen; | |
39ebc027 | 596 | len = sizeof(val); |
6f4e5fff GR |
597 | break; |
598 | case DCCP_SOCKOPT_RECV_CSCOV: | |
599 | val = dp->dccps_pcrlen; | |
39ebc027 | 600 | len = sizeof(val); |
6f4e5fff | 601 | break; |
88f964db ACM |
602 | case 128 ... 191: |
603 | return ccid_hc_rx_getsockopt(dp->dccps_hc_rx_ccid, sk, optname, | |
604 | len, (u32 __user *)optval, optlen); | |
605 | case 192 ... 255: | |
606 | return ccid_hc_tx_getsockopt(dp->dccps_hc_tx_ccid, sk, optname, | |
607 | len, (u32 __user *)optval, optlen); | |
a84ffe43 ACM |
608 | default: |
609 | return -ENOPROTOOPT; | |
610 | } | |
611 | ||
612 | if (put_user(len, optlen) || copy_to_user(optval, &val, len)) | |
613 | return -EFAULT; | |
614 | ||
615 | return 0; | |
7c657876 ACM |
616 | } |
617 | ||
3fdadf7d DM |
618 | int dccp_getsockopt(struct sock *sk, int level, int optname, |
619 | char __user *optval, int __user *optlen) | |
620 | { | |
621 | if (level != SOL_DCCP) | |
622 | return inet_csk(sk)->icsk_af_ops->getsockopt(sk, level, | |
623 | optname, optval, | |
624 | optlen); | |
625 | return do_dccp_getsockopt(sk, level, optname, optval, optlen); | |
626 | } | |
543d9cfe | 627 | |
f21e68ca ACM |
628 | EXPORT_SYMBOL_GPL(dccp_getsockopt); |
629 | ||
3fdadf7d DM |
630 | #ifdef CONFIG_COMPAT |
631 | int compat_dccp_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 632 | char __user *optval, int __user *optlen) |
3fdadf7d | 633 | { |
dec73ff0 ACM |
634 | if (level != SOL_DCCP) |
635 | return inet_csk_compat_getsockopt(sk, level, optname, | |
636 | optval, optlen); | |
3fdadf7d DM |
637 | return do_dccp_getsockopt(sk, level, optname, optval, optlen); |
638 | } | |
543d9cfe | 639 | |
3fdadf7d DM |
640 | EXPORT_SYMBOL_GPL(compat_dccp_getsockopt); |
641 | #endif | |
642 | ||
7c657876 ACM |
643 | int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, |
644 | size_t len) | |
645 | { | |
646 | const struct dccp_sock *dp = dccp_sk(sk); | |
647 | const int flags = msg->msg_flags; | |
648 | const int noblock = flags & MSG_DONTWAIT; | |
649 | struct sk_buff *skb; | |
650 | int rc, size; | |
651 | long timeo; | |
652 | ||
653 | if (len > dp->dccps_mss_cache) | |
654 | return -EMSGSIZE; | |
655 | ||
656 | lock_sock(sk); | |
b1308dc0 IM |
657 | |
658 | if (sysctl_dccp_tx_qlen && | |
659 | (sk->sk_write_queue.qlen >= sysctl_dccp_tx_qlen)) { | |
660 | rc = -EAGAIN; | |
661 | goto out_release; | |
662 | } | |
663 | ||
27258ee5 | 664 | timeo = sock_sndtimeo(sk, noblock); |
7c657876 ACM |
665 | |
666 | /* | |
667 | * We have to use sk_stream_wait_connect here to set sk_write_pending, | |
668 | * so that the trick in dccp_rcv_request_sent_state_process. | |
669 | */ | |
670 | /* Wait for a connection to finish. */ | |
cecd8d0e | 671 | if ((1 << sk->sk_state) & ~(DCCPF_OPEN | DCCPF_PARTOPEN)) |
7c657876 | 672 | if ((rc = sk_stream_wait_connect(sk, &timeo)) != 0) |
27258ee5 | 673 | goto out_release; |
7c657876 ACM |
674 | |
675 | size = sk->sk_prot->max_header + len; | |
676 | release_sock(sk); | |
677 | skb = sock_alloc_send_skb(sk, size, noblock, &rc); | |
678 | lock_sock(sk); | |
7c657876 ACM |
679 | if (skb == NULL) |
680 | goto out_release; | |
681 | ||
682 | skb_reserve(skb, sk->sk_prot->max_header); | |
683 | rc = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len); | |
27258ee5 ACM |
684 | if (rc != 0) |
685 | goto out_discard; | |
686 | ||
97e5848d IM |
687 | skb_queue_tail(&sk->sk_write_queue, skb); |
688 | dccp_write_xmit(sk,0); | |
7c657876 ACM |
689 | out_release: |
690 | release_sock(sk); | |
691 | return rc ? : len; | |
27258ee5 ACM |
692 | out_discard: |
693 | kfree_skb(skb); | |
7c657876 | 694 | goto out_release; |
7c657876 ACM |
695 | } |
696 | ||
f21e68ca ACM |
697 | EXPORT_SYMBOL_GPL(dccp_sendmsg); |
698 | ||
7c657876 ACM |
699 | int dccp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, |
700 | size_t len, int nonblock, int flags, int *addr_len) | |
701 | { | |
702 | const struct dccp_hdr *dh; | |
7c657876 ACM |
703 | long timeo; |
704 | ||
705 | lock_sock(sk); | |
706 | ||
531669a0 ACM |
707 | if (sk->sk_state == DCCP_LISTEN) { |
708 | len = -ENOTCONN; | |
7c657876 | 709 | goto out; |
7c657876 | 710 | } |
7c657876 | 711 | |
531669a0 | 712 | timeo = sock_rcvtimeo(sk, nonblock); |
7c657876 ACM |
713 | |
714 | do { | |
531669a0 | 715 | struct sk_buff *skb = skb_peek(&sk->sk_receive_queue); |
7c657876 | 716 | |
531669a0 ACM |
717 | if (skb == NULL) |
718 | goto verify_sock_status; | |
7c657876 | 719 | |
531669a0 | 720 | dh = dccp_hdr(skb); |
7c657876 | 721 | |
531669a0 ACM |
722 | if (dh->dccph_type == DCCP_PKT_DATA || |
723 | dh->dccph_type == DCCP_PKT_DATAACK) | |
724 | goto found_ok_skb; | |
7c657876 | 725 | |
531669a0 ACM |
726 | if (dh->dccph_type == DCCP_PKT_RESET || |
727 | dh->dccph_type == DCCP_PKT_CLOSE) { | |
728 | dccp_pr_debug("found fin ok!\n"); | |
729 | len = 0; | |
730 | goto found_fin_ok; | |
731 | } | |
732 | dccp_pr_debug("packet_type=%s\n", | |
733 | dccp_packet_name(dh->dccph_type)); | |
624d1164 | 734 | sk_eat_skb(sk, skb, 0); |
531669a0 ACM |
735 | verify_sock_status: |
736 | if (sock_flag(sk, SOCK_DONE)) { | |
737 | len = 0; | |
7c657876 | 738 | break; |
531669a0 | 739 | } |
7c657876 | 740 | |
531669a0 ACM |
741 | if (sk->sk_err) { |
742 | len = sock_error(sk); | |
743 | break; | |
744 | } | |
7c657876 | 745 | |
531669a0 ACM |
746 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
747 | len = 0; | |
748 | break; | |
749 | } | |
7c657876 | 750 | |
531669a0 ACM |
751 | if (sk->sk_state == DCCP_CLOSED) { |
752 | if (!sock_flag(sk, SOCK_DONE)) { | |
753 | /* This occurs when user tries to read | |
754 | * from never connected socket. | |
755 | */ | |
756 | len = -ENOTCONN; | |
7c657876 ACM |
757 | break; |
758 | } | |
531669a0 ACM |
759 | len = 0; |
760 | break; | |
7c657876 ACM |
761 | } |
762 | ||
531669a0 ACM |
763 | if (!timeo) { |
764 | len = -EAGAIN; | |
765 | break; | |
766 | } | |
7c657876 | 767 | |
531669a0 ACM |
768 | if (signal_pending(current)) { |
769 | len = sock_intr_errno(timeo); | |
770 | break; | |
771 | } | |
7c657876 | 772 | |
531669a0 | 773 | sk_wait_data(sk, &timeo); |
7c657876 | 774 | continue; |
7c657876 | 775 | found_ok_skb: |
531669a0 ACM |
776 | if (len > skb->len) |
777 | len = skb->len; | |
778 | else if (len < skb->len) | |
779 | msg->msg_flags |= MSG_TRUNC; | |
780 | ||
781 | if (skb_copy_datagram_iovec(skb, 0, msg->msg_iov, len)) { | |
782 | /* Exception. Bailout! */ | |
783 | len = -EFAULT; | |
784 | break; | |
7c657876 | 785 | } |
7c657876 ACM |
786 | found_fin_ok: |
787 | if (!(flags & MSG_PEEK)) | |
624d1164 | 788 | sk_eat_skb(sk, skb, 0); |
7c657876 | 789 | break; |
531669a0 | 790 | } while (1); |
7c657876 ACM |
791 | out: |
792 | release_sock(sk); | |
531669a0 | 793 | return len; |
7c657876 ACM |
794 | } |
795 | ||
f21e68ca ACM |
796 | EXPORT_SYMBOL_GPL(dccp_recvmsg); |
797 | ||
798 | int inet_dccp_listen(struct socket *sock, int backlog) | |
7c657876 ACM |
799 | { |
800 | struct sock *sk = sock->sk; | |
801 | unsigned char old_state; | |
802 | int err; | |
803 | ||
804 | lock_sock(sk); | |
805 | ||
806 | err = -EINVAL; | |
807 | if (sock->state != SS_UNCONNECTED || sock->type != SOCK_DCCP) | |
808 | goto out; | |
809 | ||
810 | old_state = sk->sk_state; | |
811 | if (!((1 << old_state) & (DCCPF_CLOSED | DCCPF_LISTEN))) | |
812 | goto out; | |
813 | ||
814 | /* Really, if the socket is already in listen state | |
815 | * we can only allow the backlog to be adjusted. | |
816 | */ | |
817 | if (old_state != DCCP_LISTEN) { | |
818 | /* | |
819 | * FIXME: here it probably should be sk->sk_prot->listen_start | |
820 | * see tcp_listen_start | |
821 | */ | |
72a3effa | 822 | err = dccp_listen_start(sk, backlog); |
7c657876 ACM |
823 | if (err) |
824 | goto out; | |
825 | } | |
826 | sk->sk_max_ack_backlog = backlog; | |
827 | err = 0; | |
828 | ||
829 | out: | |
830 | release_sock(sk); | |
831 | return err; | |
832 | } | |
833 | ||
f21e68ca ACM |
834 | EXPORT_SYMBOL_GPL(inet_dccp_listen); |
835 | ||
7c657876 | 836 | static const unsigned char dccp_new_state[] = { |
7690af3f ACM |
837 | /* current state: new state: action: */ |
838 | [0] = DCCP_CLOSED, | |
8109b02b | 839 | [DCCP_OPEN] = DCCP_CLOSING | DCCP_ACTION_FIN, |
7690af3f ACM |
840 | [DCCP_REQUESTING] = DCCP_CLOSED, |
841 | [DCCP_PARTOPEN] = DCCP_CLOSING | DCCP_ACTION_FIN, | |
842 | [DCCP_LISTEN] = DCCP_CLOSED, | |
843 | [DCCP_RESPOND] = DCCP_CLOSED, | |
844 | [DCCP_CLOSING] = DCCP_CLOSED, | |
845 | [DCCP_TIME_WAIT] = DCCP_CLOSED, | |
846 | [DCCP_CLOSED] = DCCP_CLOSED, | |
7c657876 ACM |
847 | }; |
848 | ||
849 | static int dccp_close_state(struct sock *sk) | |
850 | { | |
851 | const int next = dccp_new_state[sk->sk_state]; | |
852 | const int ns = next & DCCP_STATE_MASK; | |
853 | ||
854 | if (ns != sk->sk_state) | |
855 | dccp_set_state(sk, ns); | |
856 | ||
857 | return next & DCCP_ACTION_FIN; | |
858 | } | |
859 | ||
860 | void dccp_close(struct sock *sk, long timeout) | |
861 | { | |
97e5848d | 862 | struct dccp_sock *dp = dccp_sk(sk); |
7c657876 | 863 | struct sk_buff *skb; |
134af346 | 864 | int state; |
7c657876 ACM |
865 | |
866 | lock_sock(sk); | |
867 | ||
868 | sk->sk_shutdown = SHUTDOWN_MASK; | |
869 | ||
870 | if (sk->sk_state == DCCP_LISTEN) { | |
871 | dccp_set_state(sk, DCCP_CLOSED); | |
872 | ||
873 | /* Special case. */ | |
874 | inet_csk_listen_stop(sk); | |
875 | ||
876 | goto adjudge_to_death; | |
877 | } | |
878 | ||
97e5848d IM |
879 | sk_stop_timer(sk, &dp->dccps_xmit_timer); |
880 | ||
7c657876 ACM |
881 | /* |
882 | * We need to flush the recv. buffs. We do this only on the | |
883 | * descriptor close, not protocol-sourced closes, because the | |
884 | *reader process may not have drained the data yet! | |
885 | */ | |
886 | /* FIXME: check for unread data */ | |
887 | while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
888 | __kfree_skb(skb); | |
889 | } | |
890 | ||
891 | if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) { | |
892 | /* Check zero linger _after_ checking for unread data. */ | |
893 | sk->sk_prot->disconnect(sk, 0); | |
894 | } else if (dccp_close_state(sk)) { | |
7ad07e7c | 895 | dccp_send_close(sk, 1); |
7c657876 ACM |
896 | } |
897 | ||
898 | sk_stream_wait_close(sk, timeout); | |
899 | ||
900 | adjudge_to_death: | |
134af346 HX |
901 | state = sk->sk_state; |
902 | sock_hold(sk); | |
903 | sock_orphan(sk); | |
904 | atomic_inc(sk->sk_prot->orphan_count); | |
905 | ||
7ad07e7c ACM |
906 | /* |
907 | * It is the last release_sock in its life. It will remove backlog. | |
908 | */ | |
7c657876 ACM |
909 | release_sock(sk); |
910 | /* | |
911 | * Now socket is owned by kernel and we acquire BH lock | |
912 | * to finish close. No need to check for user refs. | |
913 | */ | |
914 | local_bh_disable(); | |
915 | bh_lock_sock(sk); | |
916 | BUG_TRAP(!sock_owned_by_user(sk)); | |
917 | ||
134af346 HX |
918 | /* Have we already been destroyed by a softirq or backlog? */ |
919 | if (state != DCCP_CLOSED && sk->sk_state == DCCP_CLOSED) | |
920 | goto out; | |
7ad07e7c ACM |
921 | |
922 | /* | |
923 | * The last release_sock may have processed the CLOSE or RESET | |
924 | * packet moving sock to CLOSED state, if not we have to fire | |
925 | * the CLOSE/CLOSEREQ retransmission timer, see "8.3. Termination" | |
926 | * in draft-ietf-dccp-spec-11. -acme | |
927 | */ | |
928 | if (sk->sk_state == DCCP_CLOSING) { | |
929 | /* FIXME: should start at 2 * RTT */ | |
930 | /* Timer for repeating the CLOSE/CLOSEREQ until an answer. */ | |
931 | inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, | |
932 | inet_csk(sk)->icsk_rto, | |
933 | DCCP_RTO_MAX); | |
934 | #if 0 | |
935 | /* Yeah, we should use sk->sk_prot->orphan_count, etc */ | |
7c657876 | 936 | dccp_set_state(sk, DCCP_CLOSED); |
7ad07e7c ACM |
937 | #endif |
938 | } | |
7c657876 | 939 | |
7c657876 ACM |
940 | if (sk->sk_state == DCCP_CLOSED) |
941 | inet_csk_destroy_sock(sk); | |
942 | ||
943 | /* Otherwise, socket is reprieved until protocol close. */ | |
944 | ||
134af346 | 945 | out: |
7c657876 ACM |
946 | bh_unlock_sock(sk); |
947 | local_bh_enable(); | |
948 | sock_put(sk); | |
949 | } | |
950 | ||
f21e68ca ACM |
951 | EXPORT_SYMBOL_GPL(dccp_close); |
952 | ||
7c657876 ACM |
953 | void dccp_shutdown(struct sock *sk, int how) |
954 | { | |
955 | dccp_pr_debug("entry\n"); | |
956 | } | |
957 | ||
f21e68ca ACM |
958 | EXPORT_SYMBOL_GPL(dccp_shutdown); |
959 | ||
46f09ffa | 960 | static int __init dccp_mib_init(void) |
7c657876 ACM |
961 | { |
962 | int rc = -ENOMEM; | |
963 | ||
964 | dccp_statistics[0] = alloc_percpu(struct dccp_mib); | |
965 | if (dccp_statistics[0] == NULL) | |
966 | goto out; | |
967 | ||
968 | dccp_statistics[1] = alloc_percpu(struct dccp_mib); | |
969 | if (dccp_statistics[1] == NULL) | |
970 | goto out_free_one; | |
971 | ||
972 | rc = 0; | |
973 | out: | |
974 | return rc; | |
975 | out_free_one: | |
976 | free_percpu(dccp_statistics[0]); | |
977 | dccp_statistics[0] = NULL; | |
978 | goto out; | |
979 | ||
980 | } | |
981 | ||
b61fafc4 | 982 | static void dccp_mib_exit(void) |
46f09ffa ACM |
983 | { |
984 | free_percpu(dccp_statistics[0]); | |
985 | free_percpu(dccp_statistics[1]); | |
986 | dccp_statistics[0] = dccp_statistics[1] = NULL; | |
987 | } | |
988 | ||
7c657876 ACM |
989 | static int thash_entries; |
990 | module_param(thash_entries, int, 0444); | |
991 | MODULE_PARM_DESC(thash_entries, "Number of ehash buckets"); | |
992 | ||
a1d3a355 | 993 | #ifdef CONFIG_IP_DCCP_DEBUG |
7c657876 | 994 | int dccp_debug; |
042d18f9 | 995 | module_param(dccp_debug, bool, 0444); |
7c657876 | 996 | MODULE_PARM_DESC(dccp_debug, "Enable debug messages"); |
f21e68ca ACM |
997 | |
998 | EXPORT_SYMBOL_GPL(dccp_debug); | |
a1d3a355 | 999 | #endif |
7c657876 ACM |
1000 | |
1001 | static int __init dccp_init(void) | |
1002 | { | |
1003 | unsigned long goal; | |
1004 | int ehash_order, bhash_order, i; | |
b61fafc4 | 1005 | int rc = -ENOBUFS; |
7c657876 | 1006 | |
7690af3f ACM |
1007 | dccp_hashinfo.bind_bucket_cachep = |
1008 | kmem_cache_create("dccp_bind_bucket", | |
1009 | sizeof(struct inet_bind_bucket), 0, | |
20c2df83 | 1010 | SLAB_HWCACHE_ALIGN, NULL); |
7c657876 | 1011 | if (!dccp_hashinfo.bind_bucket_cachep) |
b61fafc4 | 1012 | goto out; |
7c657876 ACM |
1013 | |
1014 | /* | |
1015 | * Size and allocate the main established and bind bucket | |
1016 | * hash tables. | |
1017 | * | |
1018 | * The methodology is similar to that of the buffer cache. | |
1019 | */ | |
1020 | if (num_physpages >= (128 * 1024)) | |
1021 | goal = num_physpages >> (21 - PAGE_SHIFT); | |
1022 | else | |
1023 | goal = num_physpages >> (23 - PAGE_SHIFT); | |
1024 | ||
1025 | if (thash_entries) | |
7690af3f ACM |
1026 | goal = (thash_entries * |
1027 | sizeof(struct inet_ehash_bucket)) >> PAGE_SHIFT; | |
7c657876 ACM |
1028 | for (ehash_order = 0; (1UL << ehash_order) < goal; ehash_order++) |
1029 | ; | |
1030 | do { | |
1031 | dccp_hashinfo.ehash_size = (1UL << ehash_order) * PAGE_SIZE / | |
1032 | sizeof(struct inet_ehash_bucket); | |
7690af3f ACM |
1033 | while (dccp_hashinfo.ehash_size & |
1034 | (dccp_hashinfo.ehash_size - 1)) | |
7c657876 ACM |
1035 | dccp_hashinfo.ehash_size--; |
1036 | dccp_hashinfo.ehash = (struct inet_ehash_bucket *) | |
1037 | __get_free_pages(GFP_ATOMIC, ehash_order); | |
1038 | } while (!dccp_hashinfo.ehash && --ehash_order > 0); | |
1039 | ||
1040 | if (!dccp_hashinfo.ehash) { | |
59348b19 | 1041 | DCCP_CRIT("Failed to allocate DCCP established hash table"); |
7c657876 ACM |
1042 | goto out_free_bind_bucket_cachep; |
1043 | } | |
1044 | ||
dbca9b27 | 1045 | for (i = 0; i < dccp_hashinfo.ehash_size; i++) { |
7c657876 ACM |
1046 | rwlock_init(&dccp_hashinfo.ehash[i].lock); |
1047 | INIT_HLIST_HEAD(&dccp_hashinfo.ehash[i].chain); | |
dbca9b27 | 1048 | INIT_HLIST_HEAD(&dccp_hashinfo.ehash[i].twchain); |
7c657876 ACM |
1049 | } |
1050 | ||
1051 | bhash_order = ehash_order; | |
1052 | ||
1053 | do { | |
1054 | dccp_hashinfo.bhash_size = (1UL << bhash_order) * PAGE_SIZE / | |
1055 | sizeof(struct inet_bind_hashbucket); | |
7690af3f ACM |
1056 | if ((dccp_hashinfo.bhash_size > (64 * 1024)) && |
1057 | bhash_order > 0) | |
7c657876 ACM |
1058 | continue; |
1059 | dccp_hashinfo.bhash = (struct inet_bind_hashbucket *) | |
1060 | __get_free_pages(GFP_ATOMIC, bhash_order); | |
1061 | } while (!dccp_hashinfo.bhash && --bhash_order >= 0); | |
1062 | ||
1063 | if (!dccp_hashinfo.bhash) { | |
59348b19 | 1064 | DCCP_CRIT("Failed to allocate DCCP bind hash table"); |
7c657876 ACM |
1065 | goto out_free_dccp_ehash; |
1066 | } | |
1067 | ||
1068 | for (i = 0; i < dccp_hashinfo.bhash_size; i++) { | |
1069 | spin_lock_init(&dccp_hashinfo.bhash[i].lock); | |
1070 | INIT_HLIST_HEAD(&dccp_hashinfo.bhash[i].chain); | |
1071 | } | |
1072 | ||
46f09ffa | 1073 | rc = dccp_mib_init(); |
fa23e2ec | 1074 | if (rc) |
7c657876 ACM |
1075 | goto out_free_dccp_bhash; |
1076 | ||
9b07ef5d | 1077 | rc = dccp_ackvec_init(); |
7c657876 | 1078 | if (rc) |
b61fafc4 | 1079 | goto out_free_dccp_mib; |
9b07ef5d | 1080 | |
e55d912f | 1081 | rc = dccp_sysctl_init(); |
9b07ef5d ACM |
1082 | if (rc) |
1083 | goto out_ackvec_exit; | |
4c70f383 GR |
1084 | |
1085 | dccp_timestamping_init(); | |
7c657876 ACM |
1086 | out: |
1087 | return rc; | |
9b07ef5d ACM |
1088 | out_ackvec_exit: |
1089 | dccp_ackvec_exit(); | |
b61fafc4 | 1090 | out_free_dccp_mib: |
46f09ffa | 1091 | dccp_mib_exit(); |
7c657876 ACM |
1092 | out_free_dccp_bhash: |
1093 | free_pages((unsigned long)dccp_hashinfo.bhash, bhash_order); | |
1094 | dccp_hashinfo.bhash = NULL; | |
1095 | out_free_dccp_ehash: | |
1096 | free_pages((unsigned long)dccp_hashinfo.ehash, ehash_order); | |
1097 | dccp_hashinfo.ehash = NULL; | |
1098 | out_free_bind_bucket_cachep: | |
1099 | kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); | |
1100 | dccp_hashinfo.bind_bucket_cachep = NULL; | |
7c657876 ACM |
1101 | goto out; |
1102 | } | |
1103 | ||
7c657876 ACM |
1104 | static void __exit dccp_fini(void) |
1105 | { | |
46f09ffa | 1106 | dccp_mib_exit(); |
725ba8ee ACM |
1107 | free_pages((unsigned long)dccp_hashinfo.bhash, |
1108 | get_order(dccp_hashinfo.bhash_size * | |
1109 | sizeof(struct inet_bind_hashbucket))); | |
1110 | free_pages((unsigned long)dccp_hashinfo.ehash, | |
1111 | get_order(dccp_hashinfo.ehash_size * | |
1112 | sizeof(struct inet_ehash_bucket))); | |
7c657876 | 1113 | kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); |
9b07ef5d | 1114 | dccp_ackvec_exit(); |
e55d912f | 1115 | dccp_sysctl_exit(); |
7c657876 ACM |
1116 | } |
1117 | ||
1118 | module_init(dccp_init); | |
1119 | module_exit(dccp_fini); | |
1120 | ||
7c657876 ACM |
1121 | MODULE_LICENSE("GPL"); |
1122 | MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@conectiva.com.br>"); | |
1123 | MODULE_DESCRIPTION("DCCP - Datagram Congestion Controlled Protocol"); |