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639b321b AG |
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> | |
5a0e3ad6 | 36 | #include <linux/gfp.h> |
639b321b AG |
37 | #include <linux/in.h> |
38 | #include <linux/poll.h> | |
639b321b AG |
39 | #include <net/sock.h> |
40 | ||
41 | #include "rds.h" | |
639b321b AG |
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; | |
639b321b | 62 | |
8690bfa1 | 63 | if (!sk) |
639b321b AG |
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); | |
38a4e5e6 | 74 | |
639b321b | 75 | rds_remove_bound(rs); |
38a4e5e6 | 76 | |
639b321b AG |
77 | rds_send_drop_to(rs, NULL); |
78 | rds_rdma_drop_keys(rs); | |
79 | rds_notify_queue_get(rs, NULL); | |
80 | ||
efc3dbc3 | 81 | spin_lock_bh(&rds_sock_lock); |
639b321b AG |
82 | list_del_init(&rs->rs_item); |
83 | rds_sock_count--; | |
efc3dbc3 | 84 | spin_unlock_bh(&rds_sock_lock); |
639b321b | 85 | |
5adb5bc6 ZB |
86 | rds_trans_put(rs->rs_transport); |
87 | ||
639b321b AG |
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 | ||
aa395145 | 163 | poll_wait(file, sk_sleep(sk), wait); |
639b321b | 164 | |
b98ba52f AG |
165 | if (rs->rs_seen_congestion) |
166 | poll_wait(file, &rds_poll_waitq, wait); | |
639b321b AG |
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 | } | |
f64f9e71 JP |
181 | if (!list_empty(&rs->rs_recv_queue) || |
182 | !list_empty(&rs->rs_notify_queue)) | |
639b321b AG |
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 | ||
b98ba52f AG |
188 | /* clear state any time we wake a seen-congested socket */ |
189 | if (mask) | |
190 | rs->rs_seen_congestion = 0; | |
191 | ||
639b321b AG |
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 | ||
d97dac54 SV |
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 | ||
639b321b | 280 | static int rds_setsockopt(struct socket *sock, int level, int optname, |
b7058842 | 281 | char __user *optval, unsigned int optlen) |
639b321b AG |
282 | { |
283 | struct rds_sock *rs = rds_sk_to_rs(sock->sk); | |
284 | int ret; | |
285 | ||
286 | if (level != SOL_RDS) { | |
287 | ret = -ENOPROTOOPT; | |
288 | goto out; | |
289 | } | |
290 | ||
291 | switch (optname) { | |
292 | case RDS_CANCEL_SENT_TO: | |
293 | ret = rds_cancel_sent_to(rs, optval, optlen); | |
294 | break; | |
295 | case RDS_GET_MR: | |
296 | ret = rds_get_mr(rs, optval, optlen); | |
297 | break; | |
244546f0 AG |
298 | case RDS_GET_MR_FOR_DEST: |
299 | ret = rds_get_mr_for_dest(rs, optval, optlen); | |
300 | break; | |
639b321b AG |
301 | case RDS_FREE_MR: |
302 | ret = rds_free_mr(rs, optval, optlen); | |
303 | break; | |
304 | case RDS_RECVERR: | |
305 | ret = rds_set_bool_option(&rs->rs_recverr, optval, optlen); | |
306 | break; | |
307 | case RDS_CONG_MONITOR: | |
308 | ret = rds_cong_monitor(rs, optval, optlen); | |
309 | break; | |
d97dac54 SV |
310 | case SO_RDS_TRANSPORT: |
311 | lock_sock(sock->sk); | |
312 | ret = rds_set_transport(rs, optval, optlen); | |
313 | release_sock(sock->sk); | |
314 | break; | |
639b321b AG |
315 | default: |
316 | ret = -ENOPROTOOPT; | |
317 | } | |
318 | out: | |
319 | return ret; | |
320 | } | |
321 | ||
322 | static int rds_getsockopt(struct socket *sock, int level, int optname, | |
323 | char __user *optval, int __user *optlen) | |
324 | { | |
325 | struct rds_sock *rs = rds_sk_to_rs(sock->sk); | |
326 | int ret = -ENOPROTOOPT, len; | |
8ba38460 | 327 | int trans; |
639b321b AG |
328 | |
329 | if (level != SOL_RDS) | |
330 | goto out; | |
331 | ||
332 | if (get_user(len, optlen)) { | |
333 | ret = -EFAULT; | |
334 | goto out; | |
335 | } | |
336 | ||
337 | switch (optname) { | |
338 | case RDS_INFO_FIRST ... RDS_INFO_LAST: | |
339 | ret = rds_info_getsockopt(sock, optname, optval, | |
340 | optlen); | |
341 | break; | |
342 | ||
343 | case RDS_RECVERR: | |
344 | if (len < sizeof(int)) | |
345 | ret = -EINVAL; | |
346 | else | |
f64f9e71 JP |
347 | if (put_user(rs->rs_recverr, (int __user *) optval) || |
348 | put_user(sizeof(int), optlen)) | |
639b321b AG |
349 | ret = -EFAULT; |
350 | else | |
351 | ret = 0; | |
352 | break; | |
8ba38460 SV |
353 | case SO_RDS_TRANSPORT: |
354 | if (len < sizeof(int)) { | |
355 | ret = -EINVAL; | |
356 | break; | |
357 | } | |
358 | trans = (rs->rs_transport ? rs->rs_transport->t_type : | |
359 | RDS_TRANS_NONE); /* unbound */ | |
360 | if (put_user(trans, (int __user *)optval) || | |
361 | put_user(sizeof(int), optlen)) | |
362 | ret = -EFAULT; | |
363 | else | |
364 | ret = 0; | |
365 | break; | |
639b321b AG |
366 | default: |
367 | break; | |
368 | } | |
369 | ||
370 | out: | |
371 | return ret; | |
372 | ||
373 | } | |
374 | ||
375 | static int rds_connect(struct socket *sock, struct sockaddr *uaddr, | |
376 | int addr_len, int flags) | |
377 | { | |
378 | struct sock *sk = sock->sk; | |
379 | struct sockaddr_in *sin = (struct sockaddr_in *)uaddr; | |
380 | struct rds_sock *rs = rds_sk_to_rs(sk); | |
381 | int ret = 0; | |
382 | ||
383 | lock_sock(sk); | |
384 | ||
385 | if (addr_len != sizeof(struct sockaddr_in)) { | |
386 | ret = -EINVAL; | |
387 | goto out; | |
388 | } | |
389 | ||
390 | if (sin->sin_family != AF_INET) { | |
391 | ret = -EAFNOSUPPORT; | |
392 | goto out; | |
393 | } | |
394 | ||
395 | if (sin->sin_addr.s_addr == htonl(INADDR_ANY)) { | |
396 | ret = -EDESTADDRREQ; | |
397 | goto out; | |
398 | } | |
399 | ||
400 | rs->rs_conn_addr = sin->sin_addr.s_addr; | |
401 | rs->rs_conn_port = sin->sin_port; | |
402 | ||
403 | out: | |
404 | release_sock(sk); | |
405 | return ret; | |
406 | } | |
407 | ||
408 | static struct proto rds_proto = { | |
409 | .name = "RDS", | |
410 | .owner = THIS_MODULE, | |
411 | .obj_size = sizeof(struct rds_sock), | |
412 | }; | |
413 | ||
5708e868 | 414 | static const struct proto_ops rds_proto_ops = { |
639b321b AG |
415 | .family = AF_RDS, |
416 | .owner = THIS_MODULE, | |
417 | .release = rds_release, | |
418 | .bind = rds_bind, | |
419 | .connect = rds_connect, | |
420 | .socketpair = sock_no_socketpair, | |
421 | .accept = sock_no_accept, | |
422 | .getname = rds_getname, | |
423 | .poll = rds_poll, | |
424 | .ioctl = rds_ioctl, | |
425 | .listen = sock_no_listen, | |
426 | .shutdown = sock_no_shutdown, | |
427 | .setsockopt = rds_setsockopt, | |
428 | .getsockopt = rds_getsockopt, | |
429 | .sendmsg = rds_sendmsg, | |
430 | .recvmsg = rds_recvmsg, | |
431 | .mmap = sock_no_mmap, | |
432 | .sendpage = sock_no_sendpage, | |
433 | }; | |
434 | ||
0df5f9a6 | 435 | static void rds_sock_destruct(struct sock *sk) |
436 | { | |
437 | struct rds_sock *rs = rds_sk_to_rs(sk); | |
438 | ||
439 | WARN_ON((&rs->rs_item != rs->rs_item.next || | |
440 | &rs->rs_item != rs->rs_item.prev)); | |
441 | } | |
442 | ||
639b321b AG |
443 | static int __rds_create(struct socket *sock, struct sock *sk, int protocol) |
444 | { | |
639b321b AG |
445 | struct rds_sock *rs; |
446 | ||
447 | sock_init_data(sock, sk); | |
448 | sock->ops = &rds_proto_ops; | |
449 | sk->sk_protocol = protocol; | |
0df5f9a6 | 450 | sk->sk_destruct = rds_sock_destruct; |
639b321b AG |
451 | |
452 | rs = rds_sk_to_rs(sk); | |
453 | spin_lock_init(&rs->rs_lock); | |
454 | rwlock_init(&rs->rs_recv_lock); | |
455 | INIT_LIST_HEAD(&rs->rs_send_queue); | |
456 | INIT_LIST_HEAD(&rs->rs_recv_queue); | |
457 | INIT_LIST_HEAD(&rs->rs_notify_queue); | |
458 | INIT_LIST_HEAD(&rs->rs_cong_list); | |
459 | spin_lock_init(&rs->rs_rdma_lock); | |
460 | rs->rs_rdma_keys = RB_ROOT; | |
461 | ||
efc3dbc3 | 462 | spin_lock_bh(&rds_sock_lock); |
639b321b AG |
463 | list_add_tail(&rs->rs_item, &rds_sock_list); |
464 | rds_sock_count++; | |
efc3dbc3 | 465 | spin_unlock_bh(&rds_sock_lock); |
639b321b AG |
466 | |
467 | return 0; | |
468 | } | |
469 | ||
3f378b68 EP |
470 | static int rds_create(struct net *net, struct socket *sock, int protocol, |
471 | int kern) | |
639b321b AG |
472 | { |
473 | struct sock *sk; | |
474 | ||
475 | if (sock->type != SOCK_SEQPACKET || protocol) | |
476 | return -ESOCKTNOSUPPORT; | |
477 | ||
11aa9c28 | 478 | sk = sk_alloc(net, AF_RDS, GFP_ATOMIC, &rds_proto, kern); |
639b321b AG |
479 | if (!sk) |
480 | return -ENOMEM; | |
481 | ||
482 | return __rds_create(sock, sk, protocol); | |
483 | } | |
484 | ||
485 | void rds_sock_addref(struct rds_sock *rs) | |
486 | { | |
487 | sock_hold(rds_rs_to_sk(rs)); | |
488 | } | |
489 | ||
490 | void rds_sock_put(struct rds_sock *rs) | |
491 | { | |
492 | sock_put(rds_rs_to_sk(rs)); | |
493 | } | |
494 | ||
ec1b4cf7 | 495 | static const struct net_proto_family rds_family_ops = { |
639b321b AG |
496 | .family = AF_RDS, |
497 | .create = rds_create, | |
498 | .owner = THIS_MODULE, | |
499 | }; | |
500 | ||
501 | static void rds_sock_inc_info(struct socket *sock, unsigned int len, | |
502 | struct rds_info_iterator *iter, | |
503 | struct rds_info_lengths *lens) | |
504 | { | |
505 | struct rds_sock *rs; | |
639b321b | 506 | struct rds_incoming *inc; |
639b321b AG |
507 | unsigned int total = 0; |
508 | ||
509 | len /= sizeof(struct rds_info_message); | |
510 | ||
efc3dbc3 | 511 | spin_lock_bh(&rds_sock_lock); |
639b321b AG |
512 | |
513 | list_for_each_entry(rs, &rds_sock_list, rs_item) { | |
639b321b AG |
514 | read_lock(&rs->rs_recv_lock); |
515 | ||
516 | /* XXX too lazy to maintain counts.. */ | |
517 | list_for_each_entry(inc, &rs->rs_recv_queue, i_item) { | |
518 | total++; | |
519 | if (total <= len) | |
520 | rds_inc_info_copy(inc, iter, inc->i_saddr, | |
521 | rs->rs_bound_addr, 1); | |
522 | } | |
523 | ||
524 | read_unlock(&rs->rs_recv_lock); | |
525 | } | |
526 | ||
efc3dbc3 | 527 | spin_unlock_bh(&rds_sock_lock); |
639b321b AG |
528 | |
529 | lens->nr = total; | |
530 | lens->each = sizeof(struct rds_info_message); | |
531 | } | |
532 | ||
533 | static void rds_sock_info(struct socket *sock, unsigned int len, | |
534 | struct rds_info_iterator *iter, | |
535 | struct rds_info_lengths *lens) | |
536 | { | |
537 | struct rds_info_socket sinfo; | |
538 | struct rds_sock *rs; | |
639b321b AG |
539 | |
540 | len /= sizeof(struct rds_info_socket); | |
541 | ||
efc3dbc3 | 542 | spin_lock_bh(&rds_sock_lock); |
639b321b AG |
543 | |
544 | if (len < rds_sock_count) | |
545 | goto out; | |
546 | ||
547 | list_for_each_entry(rs, &rds_sock_list, rs_item) { | |
548 | sinfo.sndbuf = rds_sk_sndbuf(rs); | |
549 | sinfo.rcvbuf = rds_sk_rcvbuf(rs); | |
550 | sinfo.bound_addr = rs->rs_bound_addr; | |
551 | sinfo.connected_addr = rs->rs_conn_addr; | |
552 | sinfo.bound_port = rs->rs_bound_port; | |
553 | sinfo.connected_port = rs->rs_conn_port; | |
554 | sinfo.inum = sock_i_ino(rds_rs_to_sk(rs)); | |
555 | ||
556 | rds_info_copy(iter, &sinfo, sizeof(sinfo)); | |
557 | } | |
558 | ||
559 | out: | |
560 | lens->nr = rds_sock_count; | |
561 | lens->each = sizeof(struct rds_info_socket); | |
562 | ||
efc3dbc3 | 563 | spin_unlock_bh(&rds_sock_lock); |
639b321b AG |
564 | } |
565 | ||
ef87b7ea | 566 | static void rds_exit(void) |
639b321b | 567 | { |
639b321b AG |
568 | sock_unregister(rds_family_ops.family); |
569 | proto_unregister(&rds_proto); | |
570 | rds_conn_exit(); | |
571 | rds_cong_exit(); | |
572 | rds_sysctl_exit(); | |
573 | rds_threads_exit(); | |
574 | rds_stats_exit(); | |
575 | rds_page_exit(); | |
576 | rds_info_deregister_func(RDS_INFO_SOCKETS, rds_sock_info); | |
577 | rds_info_deregister_func(RDS_INFO_RECV_MESSAGES, rds_sock_inc_info); | |
578 | } | |
579 | module_exit(rds_exit); | |
580 | ||
ef87b7ea | 581 | static int rds_init(void) |
639b321b AG |
582 | { |
583 | int ret; | |
584 | ||
585 | ret = rds_conn_init(); | |
586 | if (ret) | |
587 | goto out; | |
588 | ret = rds_threads_init(); | |
589 | if (ret) | |
590 | goto out_conn; | |
591 | ret = rds_sysctl_init(); | |
592 | if (ret) | |
593 | goto out_threads; | |
594 | ret = rds_stats_init(); | |
595 | if (ret) | |
596 | goto out_sysctl; | |
597 | ret = proto_register(&rds_proto, 1); | |
598 | if (ret) | |
599 | goto out_stats; | |
600 | ret = sock_register(&rds_family_ops); | |
601 | if (ret) | |
602 | goto out_proto; | |
603 | ||
604 | rds_info_register_func(RDS_INFO_SOCKETS, rds_sock_info); | |
605 | rds_info_register_func(RDS_INFO_RECV_MESSAGES, rds_sock_inc_info); | |
606 | ||
639b321b AG |
607 | goto out; |
608 | ||
639b321b AG |
609 | out_proto: |
610 | proto_unregister(&rds_proto); | |
611 | out_stats: | |
612 | rds_stats_exit(); | |
613 | out_sysctl: | |
614 | rds_sysctl_exit(); | |
615 | out_threads: | |
616 | rds_threads_exit(); | |
617 | out_conn: | |
618 | rds_conn_exit(); | |
619 | rds_cong_exit(); | |
620 | rds_page_exit(); | |
621 | out: | |
622 | return ret; | |
623 | } | |
624 | module_init(rds_init); | |
625 | ||
626 | #define DRV_VERSION "4.0" | |
627 | #define DRV_RELDATE "Feb 12, 2009" | |
628 | ||
629 | MODULE_AUTHOR("Oracle Corporation <rds-devel@oss.oracle.com>"); | |
630 | MODULE_DESCRIPTION("RDS: Reliable Datagram Sockets" | |
631 | " v" DRV_VERSION " (" DRV_RELDATE ")"); | |
632 | MODULE_VERSION(DRV_VERSION); | |
633 | MODULE_LICENSE("Dual BSD/GPL"); | |
634 | MODULE_ALIAS_NETPROTO(PF_RDS); |