Commit | Line | Data |
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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 CM |
74 | |
75 | /* | |
76 | * the binding lookup hash uses rcu, we need to | |
d7cdb968 | 77 | * make sure we synchronize_rcu before we free our |
38a4e5e6 CM |
78 | * entry |
79 | */ | |
639b321b | 80 | rds_remove_bound(rs); |
38a4e5e6 CM |
81 | synchronize_rcu(); |
82 | ||
639b321b AG |
83 | rds_send_drop_to(rs, NULL); |
84 | rds_rdma_drop_keys(rs); | |
85 | rds_notify_queue_get(rs, NULL); | |
86 | ||
efc3dbc3 | 87 | spin_lock_bh(&rds_sock_lock); |
639b321b AG |
88 | list_del_init(&rs->rs_item); |
89 | rds_sock_count--; | |
efc3dbc3 | 90 | spin_unlock_bh(&rds_sock_lock); |
639b321b | 91 | |
5adb5bc6 ZB |
92 | rds_trans_put(rs->rs_transport); |
93 | ||
639b321b AG |
94 | sock->sk = NULL; |
95 | sock_put(sk); | |
96 | out: | |
97 | return 0; | |
98 | } | |
99 | ||
100 | /* | |
101 | * Careful not to race with rds_release -> sock_orphan which clears sk_sleep. | |
102 | * _bh() isn't OK here, we're called from interrupt handlers. It's probably OK | |
103 | * to wake the waitqueue after sk_sleep is clear as we hold a sock ref, but | |
104 | * this seems more conservative. | |
105 | * NB - normally, one would use sk_callback_lock for this, but we can | |
106 | * get here from interrupts, whereas the network code grabs sk_callback_lock | |
107 | * with _lock_bh only - so relying on sk_callback_lock introduces livelocks. | |
108 | */ | |
109 | void rds_wake_sk_sleep(struct rds_sock *rs) | |
110 | { | |
111 | unsigned long flags; | |
112 | ||
113 | read_lock_irqsave(&rs->rs_recv_lock, flags); | |
114 | __rds_wake_sk_sleep(rds_rs_to_sk(rs)); | |
115 | read_unlock_irqrestore(&rs->rs_recv_lock, flags); | |
116 | } | |
117 | ||
118 | static int rds_getname(struct socket *sock, struct sockaddr *uaddr, | |
119 | int *uaddr_len, int peer) | |
120 | { | |
121 | struct sockaddr_in *sin = (struct sockaddr_in *)uaddr; | |
122 | struct rds_sock *rs = rds_sk_to_rs(sock->sk); | |
123 | ||
124 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
125 | ||
126 | /* racey, don't care */ | |
127 | if (peer) { | |
128 | if (!rs->rs_conn_addr) | |
129 | return -ENOTCONN; | |
130 | ||
131 | sin->sin_port = rs->rs_conn_port; | |
132 | sin->sin_addr.s_addr = rs->rs_conn_addr; | |
133 | } else { | |
134 | sin->sin_port = rs->rs_bound_port; | |
135 | sin->sin_addr.s_addr = rs->rs_bound_addr; | |
136 | } | |
137 | ||
138 | sin->sin_family = AF_INET; | |
139 | ||
140 | *uaddr_len = sizeof(*sin); | |
141 | return 0; | |
142 | } | |
143 | ||
144 | /* | |
145 | * RDS' poll is without a doubt the least intuitive part of the interface, | |
146 | * as POLLIN and POLLOUT do not behave entirely as you would expect from | |
147 | * a network protocol. | |
148 | * | |
149 | * POLLIN is asserted if | |
150 | * - there is data on the receive queue. | |
151 | * - to signal that a previously congested destination may have become | |
152 | * uncongested | |
153 | * - A notification has been queued to the socket (this can be a congestion | |
154 | * update, or a RDMA completion). | |
155 | * | |
156 | * POLLOUT is asserted if there is room on the send queue. This does not mean | |
157 | * however, that the next sendmsg() call will succeed. If the application tries | |
158 | * to send to a congested destination, the system call may still fail (and | |
159 | * return ENOBUFS). | |
160 | */ | |
161 | static unsigned int rds_poll(struct file *file, struct socket *sock, | |
162 | poll_table *wait) | |
163 | { | |
164 | struct sock *sk = sock->sk; | |
165 | struct rds_sock *rs = rds_sk_to_rs(sk); | |
166 | unsigned int mask = 0; | |
167 | unsigned long flags; | |
168 | ||
aa395145 | 169 | poll_wait(file, sk_sleep(sk), wait); |
639b321b | 170 | |
b98ba52f AG |
171 | if (rs->rs_seen_congestion) |
172 | poll_wait(file, &rds_poll_waitq, wait); | |
639b321b AG |
173 | |
174 | read_lock_irqsave(&rs->rs_recv_lock, flags); | |
175 | if (!rs->rs_cong_monitor) { | |
176 | /* When a congestion map was updated, we signal POLLIN for | |
177 | * "historical" reasons. Applications can also poll for | |
178 | * WRBAND instead. */ | |
179 | if (rds_cong_updated_since(&rs->rs_cong_track)) | |
180 | mask |= (POLLIN | POLLRDNORM | POLLWRBAND); | |
181 | } else { | |
182 | spin_lock(&rs->rs_lock); | |
183 | if (rs->rs_cong_notify) | |
184 | mask |= (POLLIN | POLLRDNORM); | |
185 | spin_unlock(&rs->rs_lock); | |
186 | } | |
f64f9e71 JP |
187 | if (!list_empty(&rs->rs_recv_queue) || |
188 | !list_empty(&rs->rs_notify_queue)) | |
639b321b AG |
189 | mask |= (POLLIN | POLLRDNORM); |
190 | if (rs->rs_snd_bytes < rds_sk_sndbuf(rs)) | |
191 | mask |= (POLLOUT | POLLWRNORM); | |
192 | read_unlock_irqrestore(&rs->rs_recv_lock, flags); | |
193 | ||
b98ba52f AG |
194 | /* clear state any time we wake a seen-congested socket */ |
195 | if (mask) | |
196 | rs->rs_seen_congestion = 0; | |
197 | ||
639b321b AG |
198 | return mask; |
199 | } | |
200 | ||
201 | static int rds_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
202 | { | |
203 | return -ENOIOCTLCMD; | |
204 | } | |
205 | ||
206 | static int rds_cancel_sent_to(struct rds_sock *rs, char __user *optval, | |
207 | int len) | |
208 | { | |
209 | struct sockaddr_in sin; | |
210 | int ret = 0; | |
211 | ||
212 | /* racing with another thread binding seems ok here */ | |
213 | if (rs->rs_bound_addr == 0) { | |
214 | ret = -ENOTCONN; /* XXX not a great errno */ | |
215 | goto out; | |
216 | } | |
217 | ||
218 | if (len < sizeof(struct sockaddr_in)) { | |
219 | ret = -EINVAL; | |
220 | goto out; | |
221 | } | |
222 | ||
223 | if (copy_from_user(&sin, optval, sizeof(sin))) { | |
224 | ret = -EFAULT; | |
225 | goto out; | |
226 | } | |
227 | ||
228 | rds_send_drop_to(rs, &sin); | |
229 | out: | |
230 | return ret; | |
231 | } | |
232 | ||
233 | static int rds_set_bool_option(unsigned char *optvar, char __user *optval, | |
234 | int optlen) | |
235 | { | |
236 | int value; | |
237 | ||
238 | if (optlen < sizeof(int)) | |
239 | return -EINVAL; | |
240 | if (get_user(value, (int __user *) optval)) | |
241 | return -EFAULT; | |
242 | *optvar = !!value; | |
243 | return 0; | |
244 | } | |
245 | ||
246 | static int rds_cong_monitor(struct rds_sock *rs, char __user *optval, | |
247 | int optlen) | |
248 | { | |
249 | int ret; | |
250 | ||
251 | ret = rds_set_bool_option(&rs->rs_cong_monitor, optval, optlen); | |
252 | if (ret == 0) { | |
253 | if (rs->rs_cong_monitor) { | |
254 | rds_cong_add_socket(rs); | |
255 | } else { | |
256 | rds_cong_remove_socket(rs); | |
257 | rs->rs_cong_mask = 0; | |
258 | rs->rs_cong_notify = 0; | |
259 | } | |
260 | } | |
261 | return ret; | |
262 | } | |
263 | ||
d97dac54 SV |
264 | static int rds_set_transport(struct rds_sock *rs, char __user *optval, |
265 | int optlen) | |
266 | { | |
267 | int t_type; | |
268 | ||
269 | if (rs->rs_transport) | |
270 | return -EOPNOTSUPP; /* previously attached to transport */ | |
271 | ||
272 | if (optlen != sizeof(int)) | |
273 | return -EINVAL; | |
274 | ||
275 | if (copy_from_user(&t_type, (int __user *)optval, sizeof(t_type))) | |
276 | return -EFAULT; | |
277 | ||
278 | if (t_type < 0 || t_type >= RDS_TRANS_COUNT) | |
279 | return -EINVAL; | |
280 | ||
281 | rs->rs_transport = rds_trans_get(t_type); | |
282 | ||
283 | return rs->rs_transport ? 0 : -ENOPROTOOPT; | |
284 | } | |
285 | ||
639b321b | 286 | static int rds_setsockopt(struct socket *sock, int level, int optname, |
b7058842 | 287 | char __user *optval, unsigned int optlen) |
639b321b AG |
288 | { |
289 | struct rds_sock *rs = rds_sk_to_rs(sock->sk); | |
290 | int ret; | |
291 | ||
292 | if (level != SOL_RDS) { | |
293 | ret = -ENOPROTOOPT; | |
294 | goto out; | |
295 | } | |
296 | ||
297 | switch (optname) { | |
298 | case RDS_CANCEL_SENT_TO: | |
299 | ret = rds_cancel_sent_to(rs, optval, optlen); | |
300 | break; | |
301 | case RDS_GET_MR: | |
302 | ret = rds_get_mr(rs, optval, optlen); | |
303 | break; | |
244546f0 AG |
304 | case RDS_GET_MR_FOR_DEST: |
305 | ret = rds_get_mr_for_dest(rs, optval, optlen); | |
306 | break; | |
639b321b AG |
307 | case RDS_FREE_MR: |
308 | ret = rds_free_mr(rs, optval, optlen); | |
309 | break; | |
310 | case RDS_RECVERR: | |
311 | ret = rds_set_bool_option(&rs->rs_recverr, optval, optlen); | |
312 | break; | |
313 | case RDS_CONG_MONITOR: | |
314 | ret = rds_cong_monitor(rs, optval, optlen); | |
315 | break; | |
d97dac54 SV |
316 | case SO_RDS_TRANSPORT: |
317 | lock_sock(sock->sk); | |
318 | ret = rds_set_transport(rs, optval, optlen); | |
319 | release_sock(sock->sk); | |
320 | break; | |
639b321b AG |
321 | default: |
322 | ret = -ENOPROTOOPT; | |
323 | } | |
324 | out: | |
325 | return ret; | |
326 | } | |
327 | ||
328 | static int rds_getsockopt(struct socket *sock, int level, int optname, | |
329 | char __user *optval, int __user *optlen) | |
330 | { | |
331 | struct rds_sock *rs = rds_sk_to_rs(sock->sk); | |
332 | int ret = -ENOPROTOOPT, len; | |
8ba38460 | 333 | int trans; |
639b321b AG |
334 | |
335 | if (level != SOL_RDS) | |
336 | goto out; | |
337 | ||
338 | if (get_user(len, optlen)) { | |
339 | ret = -EFAULT; | |
340 | goto out; | |
341 | } | |
342 | ||
343 | switch (optname) { | |
344 | case RDS_INFO_FIRST ... RDS_INFO_LAST: | |
345 | ret = rds_info_getsockopt(sock, optname, optval, | |
346 | optlen); | |
347 | break; | |
348 | ||
349 | case RDS_RECVERR: | |
350 | if (len < sizeof(int)) | |
351 | ret = -EINVAL; | |
352 | else | |
f64f9e71 JP |
353 | if (put_user(rs->rs_recverr, (int __user *) optval) || |
354 | put_user(sizeof(int), optlen)) | |
639b321b AG |
355 | ret = -EFAULT; |
356 | else | |
357 | ret = 0; | |
358 | break; | |
8ba38460 SV |
359 | case SO_RDS_TRANSPORT: |
360 | if (len < sizeof(int)) { | |
361 | ret = -EINVAL; | |
362 | break; | |
363 | } | |
364 | trans = (rs->rs_transport ? rs->rs_transport->t_type : | |
365 | RDS_TRANS_NONE); /* unbound */ | |
366 | if (put_user(trans, (int __user *)optval) || | |
367 | put_user(sizeof(int), optlen)) | |
368 | ret = -EFAULT; | |
369 | else | |
370 | ret = 0; | |
371 | break; | |
639b321b AG |
372 | default: |
373 | break; | |
374 | } | |
375 | ||
376 | out: | |
377 | return ret; | |
378 | ||
379 | } | |
380 | ||
381 | static int rds_connect(struct socket *sock, struct sockaddr *uaddr, | |
382 | int addr_len, int flags) | |
383 | { | |
384 | struct sock *sk = sock->sk; | |
385 | struct sockaddr_in *sin = (struct sockaddr_in *)uaddr; | |
386 | struct rds_sock *rs = rds_sk_to_rs(sk); | |
387 | int ret = 0; | |
388 | ||
389 | lock_sock(sk); | |
390 | ||
391 | if (addr_len != sizeof(struct sockaddr_in)) { | |
392 | ret = -EINVAL; | |
393 | goto out; | |
394 | } | |
395 | ||
396 | if (sin->sin_family != AF_INET) { | |
397 | ret = -EAFNOSUPPORT; | |
398 | goto out; | |
399 | } | |
400 | ||
401 | if (sin->sin_addr.s_addr == htonl(INADDR_ANY)) { | |
402 | ret = -EDESTADDRREQ; | |
403 | goto out; | |
404 | } | |
405 | ||
406 | rs->rs_conn_addr = sin->sin_addr.s_addr; | |
407 | rs->rs_conn_port = sin->sin_port; | |
408 | ||
409 | out: | |
410 | release_sock(sk); | |
411 | return ret; | |
412 | } | |
413 | ||
414 | static struct proto rds_proto = { | |
415 | .name = "RDS", | |
416 | .owner = THIS_MODULE, | |
417 | .obj_size = sizeof(struct rds_sock), | |
418 | }; | |
419 | ||
5708e868 | 420 | static const struct proto_ops rds_proto_ops = { |
639b321b AG |
421 | .family = AF_RDS, |
422 | .owner = THIS_MODULE, | |
423 | .release = rds_release, | |
424 | .bind = rds_bind, | |
425 | .connect = rds_connect, | |
426 | .socketpair = sock_no_socketpair, | |
427 | .accept = sock_no_accept, | |
428 | .getname = rds_getname, | |
429 | .poll = rds_poll, | |
430 | .ioctl = rds_ioctl, | |
431 | .listen = sock_no_listen, | |
432 | .shutdown = sock_no_shutdown, | |
433 | .setsockopt = rds_setsockopt, | |
434 | .getsockopt = rds_getsockopt, | |
435 | .sendmsg = rds_sendmsg, | |
436 | .recvmsg = rds_recvmsg, | |
437 | .mmap = sock_no_mmap, | |
438 | .sendpage = sock_no_sendpage, | |
439 | }; | |
440 | ||
441 | static int __rds_create(struct socket *sock, struct sock *sk, int protocol) | |
442 | { | |
639b321b AG |
443 | struct rds_sock *rs; |
444 | ||
445 | sock_init_data(sock, sk); | |
446 | sock->ops = &rds_proto_ops; | |
447 | sk->sk_protocol = protocol; | |
448 | ||
449 | rs = rds_sk_to_rs(sk); | |
450 | spin_lock_init(&rs->rs_lock); | |
451 | rwlock_init(&rs->rs_recv_lock); | |
452 | INIT_LIST_HEAD(&rs->rs_send_queue); | |
453 | INIT_LIST_HEAD(&rs->rs_recv_queue); | |
454 | INIT_LIST_HEAD(&rs->rs_notify_queue); | |
455 | INIT_LIST_HEAD(&rs->rs_cong_list); | |
456 | spin_lock_init(&rs->rs_rdma_lock); | |
457 | rs->rs_rdma_keys = RB_ROOT; | |
458 | ||
efc3dbc3 | 459 | spin_lock_bh(&rds_sock_lock); |
639b321b AG |
460 | list_add_tail(&rs->rs_item, &rds_sock_list); |
461 | rds_sock_count++; | |
efc3dbc3 | 462 | spin_unlock_bh(&rds_sock_lock); |
639b321b AG |
463 | |
464 | return 0; | |
465 | } | |
466 | ||
3f378b68 EP |
467 | static int rds_create(struct net *net, struct socket *sock, int protocol, |
468 | int kern) | |
639b321b AG |
469 | { |
470 | struct sock *sk; | |
471 | ||
472 | if (sock->type != SOCK_SEQPACKET || protocol) | |
473 | return -ESOCKTNOSUPPORT; | |
474 | ||
11aa9c28 | 475 | sk = sk_alloc(net, AF_RDS, GFP_ATOMIC, &rds_proto, kern); |
639b321b AG |
476 | if (!sk) |
477 | return -ENOMEM; | |
478 | ||
479 | return __rds_create(sock, sk, protocol); | |
480 | } | |
481 | ||
482 | void rds_sock_addref(struct rds_sock *rs) | |
483 | { | |
484 | sock_hold(rds_rs_to_sk(rs)); | |
485 | } | |
486 | ||
487 | void rds_sock_put(struct rds_sock *rs) | |
488 | { | |
489 | sock_put(rds_rs_to_sk(rs)); | |
490 | } | |
491 | ||
ec1b4cf7 | 492 | static const struct net_proto_family rds_family_ops = { |
639b321b AG |
493 | .family = AF_RDS, |
494 | .create = rds_create, | |
495 | .owner = THIS_MODULE, | |
496 | }; | |
497 | ||
498 | static void rds_sock_inc_info(struct socket *sock, unsigned int len, | |
499 | struct rds_info_iterator *iter, | |
500 | struct rds_info_lengths *lens) | |
501 | { | |
502 | struct rds_sock *rs; | |
639b321b | 503 | struct rds_incoming *inc; |
639b321b AG |
504 | unsigned int total = 0; |
505 | ||
506 | len /= sizeof(struct rds_info_message); | |
507 | ||
efc3dbc3 | 508 | spin_lock_bh(&rds_sock_lock); |
639b321b AG |
509 | |
510 | list_for_each_entry(rs, &rds_sock_list, rs_item) { | |
639b321b AG |
511 | read_lock(&rs->rs_recv_lock); |
512 | ||
513 | /* XXX too lazy to maintain counts.. */ | |
514 | list_for_each_entry(inc, &rs->rs_recv_queue, i_item) { | |
515 | total++; | |
516 | if (total <= len) | |
517 | rds_inc_info_copy(inc, iter, inc->i_saddr, | |
518 | rs->rs_bound_addr, 1); | |
519 | } | |
520 | ||
521 | read_unlock(&rs->rs_recv_lock); | |
522 | } | |
523 | ||
efc3dbc3 | 524 | spin_unlock_bh(&rds_sock_lock); |
639b321b AG |
525 | |
526 | lens->nr = total; | |
527 | lens->each = sizeof(struct rds_info_message); | |
528 | } | |
529 | ||
530 | static void rds_sock_info(struct socket *sock, unsigned int len, | |
531 | struct rds_info_iterator *iter, | |
532 | struct rds_info_lengths *lens) | |
533 | { | |
534 | struct rds_info_socket sinfo; | |
535 | struct rds_sock *rs; | |
639b321b AG |
536 | |
537 | len /= sizeof(struct rds_info_socket); | |
538 | ||
efc3dbc3 | 539 | spin_lock_bh(&rds_sock_lock); |
639b321b AG |
540 | |
541 | if (len < rds_sock_count) | |
542 | goto out; | |
543 | ||
544 | list_for_each_entry(rs, &rds_sock_list, rs_item) { | |
545 | sinfo.sndbuf = rds_sk_sndbuf(rs); | |
546 | sinfo.rcvbuf = rds_sk_rcvbuf(rs); | |
547 | sinfo.bound_addr = rs->rs_bound_addr; | |
548 | sinfo.connected_addr = rs->rs_conn_addr; | |
549 | sinfo.bound_port = rs->rs_bound_port; | |
550 | sinfo.connected_port = rs->rs_conn_port; | |
551 | sinfo.inum = sock_i_ino(rds_rs_to_sk(rs)); | |
552 | ||
553 | rds_info_copy(iter, &sinfo, sizeof(sinfo)); | |
554 | } | |
555 | ||
556 | out: | |
557 | lens->nr = rds_sock_count; | |
558 | lens->each = sizeof(struct rds_info_socket); | |
559 | ||
efc3dbc3 | 560 | spin_unlock_bh(&rds_sock_lock); |
639b321b AG |
561 | } |
562 | ||
ef87b7ea | 563 | static void rds_exit(void) |
639b321b | 564 | { |
639b321b AG |
565 | sock_unregister(rds_family_ops.family); |
566 | proto_unregister(&rds_proto); | |
567 | rds_conn_exit(); | |
568 | rds_cong_exit(); | |
569 | rds_sysctl_exit(); | |
570 | rds_threads_exit(); | |
571 | rds_stats_exit(); | |
572 | rds_page_exit(); | |
573 | rds_info_deregister_func(RDS_INFO_SOCKETS, rds_sock_info); | |
574 | rds_info_deregister_func(RDS_INFO_RECV_MESSAGES, rds_sock_inc_info); | |
575 | } | |
576 | module_exit(rds_exit); | |
577 | ||
ef87b7ea | 578 | static int rds_init(void) |
639b321b AG |
579 | { |
580 | int ret; | |
581 | ||
582 | ret = rds_conn_init(); | |
583 | if (ret) | |
584 | goto out; | |
585 | ret = rds_threads_init(); | |
586 | if (ret) | |
587 | goto out_conn; | |
588 | ret = rds_sysctl_init(); | |
589 | if (ret) | |
590 | goto out_threads; | |
591 | ret = rds_stats_init(); | |
592 | if (ret) | |
593 | goto out_sysctl; | |
594 | ret = proto_register(&rds_proto, 1); | |
595 | if (ret) | |
596 | goto out_stats; | |
597 | ret = sock_register(&rds_family_ops); | |
598 | if (ret) | |
599 | goto out_proto; | |
600 | ||
601 | rds_info_register_func(RDS_INFO_SOCKETS, rds_sock_info); | |
602 | rds_info_register_func(RDS_INFO_RECV_MESSAGES, rds_sock_inc_info); | |
603 | ||
639b321b AG |
604 | goto out; |
605 | ||
639b321b AG |
606 | out_proto: |
607 | proto_unregister(&rds_proto); | |
608 | out_stats: | |
609 | rds_stats_exit(); | |
610 | out_sysctl: | |
611 | rds_sysctl_exit(); | |
612 | out_threads: | |
613 | rds_threads_exit(); | |
614 | out_conn: | |
615 | rds_conn_exit(); | |
616 | rds_cong_exit(); | |
617 | rds_page_exit(); | |
618 | out: | |
619 | return ret; | |
620 | } | |
621 | module_init(rds_init); | |
622 | ||
623 | #define DRV_VERSION "4.0" | |
624 | #define DRV_RELDATE "Feb 12, 2009" | |
625 | ||
626 | MODULE_AUTHOR("Oracle Corporation <rds-devel@oss.oracle.com>"); | |
627 | MODULE_DESCRIPTION("RDS: Reliable Datagram Sockets" | |
628 | " v" DRV_VERSION " (" DRV_RELDATE ")"); | |
629 | MODULE_VERSION(DRV_VERSION); | |
630 | MODULE_LICENSE("Dual BSD/GPL"); | |
631 | MODULE_ALIAS_NETPROTO(PF_RDS); |