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1 | /* | |
2 | * Copyright (c) 2006 Oracle. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | * | |
32 | */ | |
33 | #include <linux/module.h> | |
34 | #include <linux/errno.h> | |
35 | #include <linux/kernel.h> | |
36 | #include <linux/gfp.h> | |
37 | #include <linux/in.h> | |
38 | #include <linux/poll.h> | |
39 | #include <net/sock.h> | |
40 | ||
41 | #include "rds.h" | |
42 | ||
43 | /* this is just used for stats gathering :/ */ | |
44 | static DEFINE_SPINLOCK(rds_sock_lock); | |
45 | static unsigned long rds_sock_count; | |
46 | static LIST_HEAD(rds_sock_list); | |
47 | DECLARE_WAIT_QUEUE_HEAD(rds_poll_waitq); | |
48 | ||
49 | /* | |
50 | * This is called as the final descriptor referencing this socket is closed. | |
51 | * We have to unbind the socket so that another socket can be bound to the | |
52 | * address it was using. | |
53 | * | |
54 | * We have to be careful about racing with the incoming path. sock_orphan() | |
55 | * sets SOCK_DEAD and we use that as an indicator to the rx path that new | |
56 | * messages shouldn't be queued. | |
57 | */ | |
58 | static int rds_release(struct socket *sock) | |
59 | { | |
60 | struct sock *sk = sock->sk; | |
61 | struct rds_sock *rs; | |
62 | ||
63 | if (!sk) | |
64 | goto out; | |
65 | ||
66 | rs = rds_sk_to_rs(sk); | |
67 | ||
68 | sock_orphan(sk); | |
69 | /* Note - rds_clear_recv_queue grabs rs_recv_lock, so | |
70 | * that ensures the recv path has completed messing | |
71 | * with the socket. */ | |
72 | rds_clear_recv_queue(rs); | |
73 | rds_cong_remove_socket(rs); | |
74 | ||
75 | rds_remove_bound(rs); | |
76 | ||
77 | rds_send_drop_to(rs, NULL); | |
78 | rds_rdma_drop_keys(rs); | |
79 | rds_notify_queue_get(rs, NULL); | |
80 | ||
81 | spin_lock_bh(&rds_sock_lock); | |
82 | list_del_init(&rs->rs_item); | |
83 | rds_sock_count--; | |
84 | spin_unlock_bh(&rds_sock_lock); | |
85 | ||
86 | rds_trans_put(rs->rs_transport); | |
87 | ||
88 | sock->sk = NULL; | |
89 | sock_put(sk); | |
90 | out: | |
91 | return 0; | |
92 | } | |
93 | ||
94 | /* | |
95 | * Careful not to race with rds_release -> sock_orphan which clears sk_sleep. | |
96 | * _bh() isn't OK here, we're called from interrupt handlers. It's probably OK | |
97 | * to wake the waitqueue after sk_sleep is clear as we hold a sock ref, but | |
98 | * this seems more conservative. | |
99 | * NB - normally, one would use sk_callback_lock for this, but we can | |
100 | * get here from interrupts, whereas the network code grabs sk_callback_lock | |
101 | * with _lock_bh only - so relying on sk_callback_lock introduces livelocks. | |
102 | */ | |
103 | void rds_wake_sk_sleep(struct rds_sock *rs) | |
104 | { | |
105 | unsigned long flags; | |
106 | ||
107 | read_lock_irqsave(&rs->rs_recv_lock, flags); | |
108 | __rds_wake_sk_sleep(rds_rs_to_sk(rs)); | |
109 | read_unlock_irqrestore(&rs->rs_recv_lock, flags); | |
110 | } | |
111 | ||
112 | static int rds_getname(struct socket *sock, struct sockaddr *uaddr, | |
113 | int *uaddr_len, int peer) | |
114 | { | |
115 | struct sockaddr_in *sin = (struct sockaddr_in *)uaddr; | |
116 | struct rds_sock *rs = rds_sk_to_rs(sock->sk); | |
117 | ||
118 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
119 | ||
120 | /* racey, don't care */ | |
121 | if (peer) { | |
122 | if (!rs->rs_conn_addr) | |
123 | return -ENOTCONN; | |
124 | ||
125 | sin->sin_port = rs->rs_conn_port; | |
126 | sin->sin_addr.s_addr = rs->rs_conn_addr; | |
127 | } else { | |
128 | sin->sin_port = rs->rs_bound_port; | |
129 | sin->sin_addr.s_addr = rs->rs_bound_addr; | |
130 | } | |
131 | ||
132 | sin->sin_family = AF_INET; | |
133 | ||
134 | *uaddr_len = sizeof(*sin); | |
135 | return 0; | |
136 | } | |
137 | ||
138 | /* | |
139 | * RDS' poll is without a doubt the least intuitive part of the interface, | |
140 | * as POLLIN and POLLOUT do not behave entirely as you would expect from | |
141 | * a network protocol. | |
142 | * | |
143 | * POLLIN is asserted if | |
144 | * - there is data on the receive queue. | |
145 | * - to signal that a previously congested destination may have become | |
146 | * uncongested | |
147 | * - A notification has been queued to the socket (this can be a congestion | |
148 | * update, or a RDMA completion). | |
149 | * | |
150 | * POLLOUT is asserted if there is room on the send queue. This does not mean | |
151 | * however, that the next sendmsg() call will succeed. If the application tries | |
152 | * to send to a congested destination, the system call may still fail (and | |
153 | * return ENOBUFS). | |
154 | */ | |
155 | static unsigned int rds_poll(struct file *file, struct socket *sock, | |
156 | poll_table *wait) | |
157 | { | |
158 | struct sock *sk = sock->sk; | |
159 | struct rds_sock *rs = rds_sk_to_rs(sk); | |
160 | unsigned int mask = 0; | |
161 | unsigned long flags; | |
162 | ||
163 | poll_wait(file, sk_sleep(sk), wait); | |
164 | ||
165 | if (rs->rs_seen_congestion) | |
166 | poll_wait(file, &rds_poll_waitq, wait); | |
167 | ||
168 | read_lock_irqsave(&rs->rs_recv_lock, flags); | |
169 | if (!rs->rs_cong_monitor) { | |
170 | /* When a congestion map was updated, we signal POLLIN for | |
171 | * "historical" reasons. Applications can also poll for | |
172 | * WRBAND instead. */ | |
173 | if (rds_cong_updated_since(&rs->rs_cong_track)) | |
174 | mask |= (POLLIN | POLLRDNORM | POLLWRBAND); | |
175 | } else { | |
176 | spin_lock(&rs->rs_lock); | |
177 | if (rs->rs_cong_notify) | |
178 | mask |= (POLLIN | POLLRDNORM); | |
179 | spin_unlock(&rs->rs_lock); | |
180 | } | |
181 | if (!list_empty(&rs->rs_recv_queue) || | |
182 | !list_empty(&rs->rs_notify_queue)) | |
183 | mask |= (POLLIN | POLLRDNORM); | |
184 | if (rs->rs_snd_bytes < rds_sk_sndbuf(rs)) | |
185 | mask |= (POLLOUT | POLLWRNORM); | |
186 | read_unlock_irqrestore(&rs->rs_recv_lock, flags); | |
187 | ||
188 | /* clear state any time we wake a seen-congested socket */ | |
189 | if (mask) | |
190 | rs->rs_seen_congestion = 0; | |
191 | ||
192 | return mask; | |
193 | } | |
194 | ||
195 | static int rds_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
196 | { | |
197 | return -ENOIOCTLCMD; | |
198 | } | |
199 | ||
200 | static int rds_cancel_sent_to(struct rds_sock *rs, char __user *optval, | |
201 | int len) | |
202 | { | |
203 | struct sockaddr_in sin; | |
204 | int ret = 0; | |
205 | ||
206 | /* racing with another thread binding seems ok here */ | |
207 | if (rs->rs_bound_addr == 0) { | |
208 | ret = -ENOTCONN; /* XXX not a great errno */ | |
209 | goto out; | |
210 | } | |
211 | ||
212 | if (len < sizeof(struct sockaddr_in)) { | |
213 | ret = -EINVAL; | |
214 | goto out; | |
215 | } | |
216 | ||
217 | if (copy_from_user(&sin, optval, sizeof(sin))) { | |
218 | ret = -EFAULT; | |
219 | goto out; | |
220 | } | |
221 | ||
222 | rds_send_drop_to(rs, &sin); | |
223 | out: | |
224 | return ret; | |
225 | } | |
226 | ||
227 | static int rds_set_bool_option(unsigned char *optvar, char __user *optval, | |
228 | int optlen) | |
229 | { | |
230 | int value; | |
231 | ||
232 | if (optlen < sizeof(int)) | |
233 | return -EINVAL; | |
234 | if (get_user(value, (int __user *) optval)) | |
235 | return -EFAULT; | |
236 | *optvar = !!value; | |
237 | return 0; | |
238 | } | |
239 | ||
240 | static int rds_cong_monitor(struct rds_sock *rs, char __user *optval, | |
241 | int optlen) | |
242 | { | |
243 | int ret; | |
244 | ||
245 | ret = rds_set_bool_option(&rs->rs_cong_monitor, optval, optlen); | |
246 | if (ret == 0) { | |
247 | if (rs->rs_cong_monitor) { | |
248 | rds_cong_add_socket(rs); | |
249 | } else { | |
250 | rds_cong_remove_socket(rs); | |
251 | rs->rs_cong_mask = 0; | |
252 | rs->rs_cong_notify = 0; | |
253 | } | |
254 | } | |
255 | return ret; | |
256 | } | |
257 | ||
258 | static int rds_set_transport(struct rds_sock *rs, char __user *optval, | |
259 | int optlen) | |
260 | { | |
261 | int t_type; | |
262 | ||
263 | if (rs->rs_transport) | |
264 | return -EOPNOTSUPP; /* previously attached to transport */ | |
265 | ||
266 | if (optlen != sizeof(int)) | |
267 | return -EINVAL; | |
268 | ||
269 | if (copy_from_user(&t_type, (int __user *)optval, sizeof(t_type))) | |
270 | return -EFAULT; | |
271 | ||
272 | if (t_type < 0 || t_type >= RDS_TRANS_COUNT) | |
273 | return -EINVAL; | |
274 | ||
275 | rs->rs_transport = rds_trans_get(t_type); | |
276 | ||
277 | return rs->rs_transport ? 0 : -ENOPROTOOPT; | |
278 | } | |
279 | ||
280 | static int rds_enable_recvtstamp(struct sock *sk, char __user *optval, | |
281 | int optlen) | |
282 | { | |
283 | int val, valbool; | |
284 | ||
285 | if (optlen != sizeof(int)) | |
286 | return -EFAULT; | |
287 | ||
288 | if (get_user(val, (int __user *)optval)) | |
289 | return -EFAULT; | |
290 | ||
291 | valbool = val ? 1 : 0; | |
292 | ||
293 | if (valbool) | |
294 | sock_set_flag(sk, SOCK_RCVTSTAMP); | |
295 | else | |
296 | sock_reset_flag(sk, SOCK_RCVTSTAMP); | |
297 | ||
298 | return 0; | |
299 | } | |
300 | ||
301 | static int rds_setsockopt(struct socket *sock, int level, int optname, | |
302 | char __user *optval, unsigned int optlen) | |
303 | { | |
304 | struct rds_sock *rs = rds_sk_to_rs(sock->sk); | |
305 | int ret; | |
306 | ||
307 | if (level != SOL_RDS) { | |
308 | ret = -ENOPROTOOPT; | |
309 | goto out; | |
310 | } | |
311 | ||
312 | switch (optname) { | |
313 | case RDS_CANCEL_SENT_TO: | |
314 | ret = rds_cancel_sent_to(rs, optval, optlen); | |
315 | break; | |
316 | case RDS_GET_MR: | |
317 | ret = rds_get_mr(rs, optval, optlen); | |
318 | break; | |
319 | case RDS_GET_MR_FOR_DEST: | |
320 | ret = rds_get_mr_for_dest(rs, optval, optlen); | |
321 | break; | |
322 | case RDS_FREE_MR: | |
323 | ret = rds_free_mr(rs, optval, optlen); | |
324 | break; | |
325 | case RDS_RECVERR: | |
326 | ret = rds_set_bool_option(&rs->rs_recverr, optval, optlen); | |
327 | break; | |
328 | case RDS_CONG_MONITOR: | |
329 | ret = rds_cong_monitor(rs, optval, optlen); | |
330 | break; | |
331 | case SO_RDS_TRANSPORT: | |
332 | lock_sock(sock->sk); | |
333 | ret = rds_set_transport(rs, optval, optlen); | |
334 | release_sock(sock->sk); | |
335 | break; | |
336 | case SO_TIMESTAMP: | |
337 | lock_sock(sock->sk); | |
338 | ret = rds_enable_recvtstamp(sock->sk, optval, optlen); | |
339 | release_sock(sock->sk); | |
340 | break; | |
341 | default: | |
342 | ret = -ENOPROTOOPT; | |
343 | } | |
344 | out: | |
345 | return ret; | |
346 | } | |
347 | ||
348 | static int rds_getsockopt(struct socket *sock, int level, int optname, | |
349 | char __user *optval, int __user *optlen) | |
350 | { | |
351 | struct rds_sock *rs = rds_sk_to_rs(sock->sk); | |
352 | int ret = -ENOPROTOOPT, len; | |
353 | int trans; | |
354 | ||
355 | if (level != SOL_RDS) | |
356 | goto out; | |
357 | ||
358 | if (get_user(len, optlen)) { | |
359 | ret = -EFAULT; | |
360 | goto out; | |
361 | } | |
362 | ||
363 | switch (optname) { | |
364 | case RDS_INFO_FIRST ... RDS_INFO_LAST: | |
365 | ret = rds_info_getsockopt(sock, optname, optval, | |
366 | optlen); | |
367 | break; | |
368 | ||
369 | case RDS_RECVERR: | |
370 | if (len < sizeof(int)) | |
371 | ret = -EINVAL; | |
372 | else | |
373 | if (put_user(rs->rs_recverr, (int __user *) optval) || | |
374 | put_user(sizeof(int), optlen)) | |
375 | ret = -EFAULT; | |
376 | else | |
377 | ret = 0; | |
378 | break; | |
379 | case SO_RDS_TRANSPORT: | |
380 | if (len < sizeof(int)) { | |
381 | ret = -EINVAL; | |
382 | break; | |
383 | } | |
384 | trans = (rs->rs_transport ? rs->rs_transport->t_type : | |
385 | RDS_TRANS_NONE); /* unbound */ | |
386 | if (put_user(trans, (int __user *)optval) || | |
387 | put_user(sizeof(int), optlen)) | |
388 | ret = -EFAULT; | |
389 | else | |
390 | ret = 0; | |
391 | break; | |
392 | default: | |
393 | break; | |
394 | } | |
395 | ||
396 | out: | |
397 | return ret; | |
398 | ||
399 | } | |
400 | ||
401 | static int rds_connect(struct socket *sock, struct sockaddr *uaddr, | |
402 | int addr_len, int flags) | |
403 | { | |
404 | struct sock *sk = sock->sk; | |
405 | struct sockaddr_in *sin = (struct sockaddr_in *)uaddr; | |
406 | struct rds_sock *rs = rds_sk_to_rs(sk); | |
407 | int ret = 0; | |
408 | ||
409 | lock_sock(sk); | |
410 | ||
411 | if (addr_len != sizeof(struct sockaddr_in)) { | |
412 | ret = -EINVAL; | |
413 | goto out; | |
414 | } | |
415 | ||
416 | if (sin->sin_family != AF_INET) { | |
417 | ret = -EAFNOSUPPORT; | |
418 | goto out; | |
419 | } | |
420 | ||
421 | if (sin->sin_addr.s_addr == htonl(INADDR_ANY)) { | |
422 | ret = -EDESTADDRREQ; | |
423 | goto out; | |
424 | } | |
425 | ||
426 | rs->rs_conn_addr = sin->sin_addr.s_addr; | |
427 | rs->rs_conn_port = sin->sin_port; | |
428 | ||
429 | out: | |
430 | release_sock(sk); | |
431 | return ret; | |
432 | } | |
433 | ||
434 | static struct proto rds_proto = { | |
435 | .name = "RDS", | |
436 | .owner = THIS_MODULE, | |
437 | .obj_size = sizeof(struct rds_sock), | |
438 | }; | |
439 | ||
440 | static const struct proto_ops rds_proto_ops = { | |
441 | .family = AF_RDS, | |
442 | .owner = THIS_MODULE, | |
443 | .release = rds_release, | |
444 | .bind = rds_bind, | |
445 | .connect = rds_connect, | |
446 | .socketpair = sock_no_socketpair, | |
447 | .accept = sock_no_accept, | |
448 | .getname = rds_getname, | |
449 | .poll = rds_poll, | |
450 | .ioctl = rds_ioctl, | |
451 | .listen = sock_no_listen, | |
452 | .shutdown = sock_no_shutdown, | |
453 | .setsockopt = rds_setsockopt, | |
454 | .getsockopt = rds_getsockopt, | |
455 | .sendmsg = rds_sendmsg, | |
456 | .recvmsg = rds_recvmsg, | |
457 | .mmap = sock_no_mmap, | |
458 | .sendpage = sock_no_sendpage, | |
459 | }; | |
460 | ||
461 | static void rds_sock_destruct(struct sock *sk) | |
462 | { | |
463 | struct rds_sock *rs = rds_sk_to_rs(sk); | |
464 | ||
465 | WARN_ON((&rs->rs_item != rs->rs_item.next || | |
466 | &rs->rs_item != rs->rs_item.prev)); | |
467 | } | |
468 | ||
469 | static int __rds_create(struct socket *sock, struct sock *sk, int protocol) | |
470 | { | |
471 | struct rds_sock *rs; | |
472 | ||
473 | sock_init_data(sock, sk); | |
474 | sock->ops = &rds_proto_ops; | |
475 | sk->sk_protocol = protocol; | |
476 | sk->sk_destruct = rds_sock_destruct; | |
477 | ||
478 | rs = rds_sk_to_rs(sk); | |
479 | spin_lock_init(&rs->rs_lock); | |
480 | rwlock_init(&rs->rs_recv_lock); | |
481 | INIT_LIST_HEAD(&rs->rs_send_queue); | |
482 | INIT_LIST_HEAD(&rs->rs_recv_queue); | |
483 | INIT_LIST_HEAD(&rs->rs_notify_queue); | |
484 | INIT_LIST_HEAD(&rs->rs_cong_list); | |
485 | spin_lock_init(&rs->rs_rdma_lock); | |
486 | rs->rs_rdma_keys = RB_ROOT; | |
487 | ||
488 | spin_lock_bh(&rds_sock_lock); | |
489 | list_add_tail(&rs->rs_item, &rds_sock_list); | |
490 | rds_sock_count++; | |
491 | spin_unlock_bh(&rds_sock_lock); | |
492 | ||
493 | return 0; | |
494 | } | |
495 | ||
496 | static int rds_create(struct net *net, struct socket *sock, int protocol, | |
497 | int kern) | |
498 | { | |
499 | struct sock *sk; | |
500 | ||
501 | if (sock->type != SOCK_SEQPACKET || protocol) | |
502 | return -ESOCKTNOSUPPORT; | |
503 | ||
504 | sk = sk_alloc(net, AF_RDS, GFP_ATOMIC, &rds_proto, kern); | |
505 | if (!sk) | |
506 | return -ENOMEM; | |
507 | ||
508 | return __rds_create(sock, sk, protocol); | |
509 | } | |
510 | ||
511 | void rds_sock_addref(struct rds_sock *rs) | |
512 | { | |
513 | sock_hold(rds_rs_to_sk(rs)); | |
514 | } | |
515 | ||
516 | void rds_sock_put(struct rds_sock *rs) | |
517 | { | |
518 | sock_put(rds_rs_to_sk(rs)); | |
519 | } | |
520 | ||
521 | static const struct net_proto_family rds_family_ops = { | |
522 | .family = AF_RDS, | |
523 | .create = rds_create, | |
524 | .owner = THIS_MODULE, | |
525 | }; | |
526 | ||
527 | static void rds_sock_inc_info(struct socket *sock, unsigned int len, | |
528 | struct rds_info_iterator *iter, | |
529 | struct rds_info_lengths *lens) | |
530 | { | |
531 | struct rds_sock *rs; | |
532 | struct rds_incoming *inc; | |
533 | unsigned int total = 0; | |
534 | ||
535 | len /= sizeof(struct rds_info_message); | |
536 | ||
537 | spin_lock_bh(&rds_sock_lock); | |
538 | ||
539 | list_for_each_entry(rs, &rds_sock_list, rs_item) { | |
540 | read_lock(&rs->rs_recv_lock); | |
541 | ||
542 | /* XXX too lazy to maintain counts.. */ | |
543 | list_for_each_entry(inc, &rs->rs_recv_queue, i_item) { | |
544 | total++; | |
545 | if (total <= len) | |
546 | rds_inc_info_copy(inc, iter, inc->i_saddr, | |
547 | rs->rs_bound_addr, 1); | |
548 | } | |
549 | ||
550 | read_unlock(&rs->rs_recv_lock); | |
551 | } | |
552 | ||
553 | spin_unlock_bh(&rds_sock_lock); | |
554 | ||
555 | lens->nr = total; | |
556 | lens->each = sizeof(struct rds_info_message); | |
557 | } | |
558 | ||
559 | static void rds_sock_info(struct socket *sock, unsigned int len, | |
560 | struct rds_info_iterator *iter, | |
561 | struct rds_info_lengths *lens) | |
562 | { | |
563 | struct rds_info_socket sinfo; | |
564 | struct rds_sock *rs; | |
565 | ||
566 | len /= sizeof(struct rds_info_socket); | |
567 | ||
568 | spin_lock_bh(&rds_sock_lock); | |
569 | ||
570 | if (len < rds_sock_count) | |
571 | goto out; | |
572 | ||
573 | list_for_each_entry(rs, &rds_sock_list, rs_item) { | |
574 | sinfo.sndbuf = rds_sk_sndbuf(rs); | |
575 | sinfo.rcvbuf = rds_sk_rcvbuf(rs); | |
576 | sinfo.bound_addr = rs->rs_bound_addr; | |
577 | sinfo.connected_addr = rs->rs_conn_addr; | |
578 | sinfo.bound_port = rs->rs_bound_port; | |
579 | sinfo.connected_port = rs->rs_conn_port; | |
580 | sinfo.inum = sock_i_ino(rds_rs_to_sk(rs)); | |
581 | ||
582 | rds_info_copy(iter, &sinfo, sizeof(sinfo)); | |
583 | } | |
584 | ||
585 | out: | |
586 | lens->nr = rds_sock_count; | |
587 | lens->each = sizeof(struct rds_info_socket); | |
588 | ||
589 | spin_unlock_bh(&rds_sock_lock); | |
590 | } | |
591 | ||
592 | static void rds_exit(void) | |
593 | { | |
594 | sock_unregister(rds_family_ops.family); | |
595 | proto_unregister(&rds_proto); | |
596 | rds_conn_exit(); | |
597 | rds_cong_exit(); | |
598 | rds_sysctl_exit(); | |
599 | rds_threads_exit(); | |
600 | rds_stats_exit(); | |
601 | rds_page_exit(); | |
602 | rds_bind_lock_destroy(); | |
603 | rds_info_deregister_func(RDS_INFO_SOCKETS, rds_sock_info); | |
604 | rds_info_deregister_func(RDS_INFO_RECV_MESSAGES, rds_sock_inc_info); | |
605 | } | |
606 | module_exit(rds_exit); | |
607 | ||
608 | static int rds_init(void) | |
609 | { | |
610 | int ret; | |
611 | ||
612 | ret = rds_bind_lock_init(); | |
613 | if (ret) | |
614 | goto out; | |
615 | ||
616 | ret = rds_conn_init(); | |
617 | if (ret) | |
618 | goto out_bind; | |
619 | ||
620 | ret = rds_threads_init(); | |
621 | if (ret) | |
622 | goto out_conn; | |
623 | ret = rds_sysctl_init(); | |
624 | if (ret) | |
625 | goto out_threads; | |
626 | ret = rds_stats_init(); | |
627 | if (ret) | |
628 | goto out_sysctl; | |
629 | ret = proto_register(&rds_proto, 1); | |
630 | if (ret) | |
631 | goto out_stats; | |
632 | ret = sock_register(&rds_family_ops); | |
633 | if (ret) | |
634 | goto out_proto; | |
635 | ||
636 | rds_info_register_func(RDS_INFO_SOCKETS, rds_sock_info); | |
637 | rds_info_register_func(RDS_INFO_RECV_MESSAGES, rds_sock_inc_info); | |
638 | ||
639 | goto out; | |
640 | ||
641 | out_proto: | |
642 | proto_unregister(&rds_proto); | |
643 | out_stats: | |
644 | rds_stats_exit(); | |
645 | out_sysctl: | |
646 | rds_sysctl_exit(); | |
647 | out_threads: | |
648 | rds_threads_exit(); | |
649 | out_conn: | |
650 | rds_conn_exit(); | |
651 | rds_cong_exit(); | |
652 | rds_page_exit(); | |
653 | out_bind: | |
654 | rds_bind_lock_destroy(); | |
655 | out: | |
656 | return ret; | |
657 | } | |
658 | module_init(rds_init); | |
659 | ||
660 | #define DRV_VERSION "4.0" | |
661 | #define DRV_RELDATE "Feb 12, 2009" | |
662 | ||
663 | MODULE_AUTHOR("Oracle Corporation <rds-devel@oss.oracle.com>"); | |
664 | MODULE_DESCRIPTION("RDS: Reliable Datagram Sockets" | |
665 | " v" DRV_VERSION " (" DRV_RELDATE ")"); | |
666 | MODULE_VERSION(DRV_VERSION); | |
667 | MODULE_LICENSE("Dual BSD/GPL"); | |
668 | MODULE_ALIAS_NETPROTO(PF_RDS); |