2 * Copyright (c) 2006, 2019 Oracle and/or its affiliates. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
33 #include <linux/module.h>
34 #include <linux/errno.h>
35 #include <linux/kernel.h>
36 #include <linux/gfp.h>
38 #include <linux/ipv6.h>
39 #include <linux/poll.h>
44 /* this is just used for stats gathering :/ */
45 static DEFINE_SPINLOCK(rds_sock_lock);
46 static unsigned long rds_sock_count;
47 static LIST_HEAD(rds_sock_list);
48 DECLARE_WAIT_QUEUE_HEAD(rds_poll_waitq);
51 * This is called as the final descriptor referencing this socket is closed.
52 * We have to unbind the socket so that another socket can be bound to the
53 * address it was using.
55 * We have to be careful about racing with the incoming path. sock_orphan()
56 * sets SOCK_DEAD and we use that as an indicator to the rx path that new
57 * messages shouldn't be queued.
59 static int rds_release(struct socket *sock)
61 struct sock *sk = sock->sk;
67 rs = rds_sk_to_rs(sk);
70 /* Note - rds_clear_recv_queue grabs rs_recv_lock, so
71 * that ensures the recv path has completed messing
73 rds_clear_recv_queue(rs);
74 rds_cong_remove_socket(rs);
78 rds_send_drop_to(rs, NULL);
79 rds_rdma_drop_keys(rs);
80 rds_notify_queue_get(rs, NULL);
81 rds_notify_msg_zcopy_purge(&rs->rs_zcookie_queue);
83 spin_lock_bh(&rds_sock_lock);
84 list_del_init(&rs->rs_item);
86 spin_unlock_bh(&rds_sock_lock);
88 rds_trans_put(rs->rs_transport);
97 * Careful not to race with rds_release -> sock_orphan which clears sk_sleep.
98 * _bh() isn't OK here, we're called from interrupt handlers. It's probably OK
99 * to wake the waitqueue after sk_sleep is clear as we hold a sock ref, but
100 * this seems more conservative.
101 * NB - normally, one would use sk_callback_lock for this, but we can
102 * get here from interrupts, whereas the network code grabs sk_callback_lock
103 * with _lock_bh only - so relying on sk_callback_lock introduces livelocks.
105 void rds_wake_sk_sleep(struct rds_sock *rs)
109 read_lock_irqsave(&rs->rs_recv_lock, flags);
110 __rds_wake_sk_sleep(rds_rs_to_sk(rs));
111 read_unlock_irqrestore(&rs->rs_recv_lock, flags);
114 static int rds_getname(struct socket *sock, struct sockaddr *uaddr,
117 struct rds_sock *rs = rds_sk_to_rs(sock->sk);
118 struct sockaddr_in6 *sin6;
119 struct sockaddr_in *sin;
122 /* racey, don't care */
124 if (ipv6_addr_any(&rs->rs_conn_addr))
127 if (ipv6_addr_v4mapped(&rs->rs_conn_addr)) {
128 sin = (struct sockaddr_in *)uaddr;
129 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
130 sin->sin_family = AF_INET;
131 sin->sin_port = rs->rs_conn_port;
132 sin->sin_addr.s_addr = rs->rs_conn_addr_v4;
133 uaddr_len = sizeof(*sin);
135 sin6 = (struct sockaddr_in6 *)uaddr;
136 sin6->sin6_family = AF_INET6;
137 sin6->sin6_port = rs->rs_conn_port;
138 sin6->sin6_addr = rs->rs_conn_addr;
139 sin6->sin6_flowinfo = 0;
140 /* scope_id is the same as in the bound address. */
141 sin6->sin6_scope_id = rs->rs_bound_scope_id;
142 uaddr_len = sizeof(*sin6);
145 /* If socket is not yet bound and the socket is connected,
146 * set the return address family to be the same as the
147 * connected address, but with 0 address value. If it is not
148 * connected, set the family to be AF_UNSPEC (value 0) and
149 * the address size to be that of an IPv4 address.
151 if (ipv6_addr_any(&rs->rs_bound_addr)) {
152 if (ipv6_addr_any(&rs->rs_conn_addr)) {
153 sin = (struct sockaddr_in *)uaddr;
154 memset(sin, 0, sizeof(*sin));
155 sin->sin_family = AF_UNSPEC;
159 #if IS_ENABLED(CONFIG_IPV6)
160 if (!(ipv6_addr_type(&rs->rs_conn_addr) &
162 sin6 = (struct sockaddr_in6 *)uaddr;
163 memset(sin6, 0, sizeof(*sin6));
164 sin6->sin6_family = AF_INET6;
165 return sizeof(*sin6);
169 sin = (struct sockaddr_in *)uaddr;
170 memset(sin, 0, sizeof(*sin));
171 sin->sin_family = AF_INET;
174 if (ipv6_addr_v4mapped(&rs->rs_bound_addr)) {
175 sin = (struct sockaddr_in *)uaddr;
176 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
177 sin->sin_family = AF_INET;
178 sin->sin_port = rs->rs_bound_port;
179 sin->sin_addr.s_addr = rs->rs_bound_addr_v4;
180 uaddr_len = sizeof(*sin);
182 sin6 = (struct sockaddr_in6 *)uaddr;
183 sin6->sin6_family = AF_INET6;
184 sin6->sin6_port = rs->rs_bound_port;
185 sin6->sin6_addr = rs->rs_bound_addr;
186 sin6->sin6_flowinfo = 0;
187 sin6->sin6_scope_id = rs->rs_bound_scope_id;
188 uaddr_len = sizeof(*sin6);
196 * RDS' poll is without a doubt the least intuitive part of the interface,
197 * as EPOLLIN and EPOLLOUT do not behave entirely as you would expect from
198 * a network protocol.
200 * EPOLLIN is asserted if
201 * - there is data on the receive queue.
202 * - to signal that a previously congested destination may have become
204 * - A notification has been queued to the socket (this can be a congestion
205 * update, or a RDMA completion, or a MSG_ZEROCOPY completion).
207 * EPOLLOUT is asserted if there is room on the send queue. This does not mean
208 * however, that the next sendmsg() call will succeed. If the application tries
209 * to send to a congested destination, the system call may still fail (and
212 static __poll_t rds_poll(struct file *file, struct socket *sock,
215 struct sock *sk = sock->sk;
216 struct rds_sock *rs = rds_sk_to_rs(sk);
220 poll_wait(file, sk_sleep(sk), wait);
222 if (rs->rs_seen_congestion)
223 poll_wait(file, &rds_poll_waitq, wait);
225 read_lock_irqsave(&rs->rs_recv_lock, flags);
226 if (!rs->rs_cong_monitor) {
227 /* When a congestion map was updated, we signal EPOLLIN for
228 * "historical" reasons. Applications can also poll for
230 if (rds_cong_updated_since(&rs->rs_cong_track))
231 mask |= (EPOLLIN | EPOLLRDNORM | EPOLLWRBAND);
233 spin_lock(&rs->rs_lock);
234 if (rs->rs_cong_notify)
235 mask |= (EPOLLIN | EPOLLRDNORM);
236 spin_unlock(&rs->rs_lock);
238 if (!list_empty(&rs->rs_recv_queue) ||
239 !list_empty(&rs->rs_notify_queue) ||
240 !list_empty(&rs->rs_zcookie_queue.zcookie_head))
241 mask |= (EPOLLIN | EPOLLRDNORM);
242 if (rs->rs_snd_bytes < rds_sk_sndbuf(rs))
243 mask |= (EPOLLOUT | EPOLLWRNORM);
244 if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
246 read_unlock_irqrestore(&rs->rs_recv_lock, flags);
248 /* clear state any time we wake a seen-congested socket */
250 rs->rs_seen_congestion = 0;
255 static int rds_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
257 struct rds_sock *rs = rds_sk_to_rs(sock->sk);
258 rds_tos_t utos, tos = 0;
262 if (get_user(utos, (rds_tos_t __user *)arg))
265 if (rs->rs_transport &&
266 rs->rs_transport->get_tos_map)
267 tos = rs->rs_transport->get_tos_map(utos);
271 spin_lock_bh(&rds_sock_lock);
272 if (rs->rs_tos || rs->rs_conn) {
273 spin_unlock_bh(&rds_sock_lock);
277 spin_unlock_bh(&rds_sock_lock);
280 spin_lock_bh(&rds_sock_lock);
282 spin_unlock_bh(&rds_sock_lock);
283 if (put_user(tos, (rds_tos_t __user *)arg))
293 static int rds_cancel_sent_to(struct rds_sock *rs, sockptr_t optval, int len)
295 struct sockaddr_in6 sin6;
296 struct sockaddr_in sin;
299 /* racing with another thread binding seems ok here */
300 if (ipv6_addr_any(&rs->rs_bound_addr)) {
301 ret = -ENOTCONN; /* XXX not a great errno */
305 if (len < sizeof(struct sockaddr_in)) {
308 } else if (len < sizeof(struct sockaddr_in6)) {
310 if (copy_from_sockptr(&sin, optval,
311 sizeof(struct sockaddr_in))) {
315 ipv6_addr_set_v4mapped(sin.sin_addr.s_addr, &sin6.sin6_addr);
316 sin6.sin6_port = sin.sin_port;
318 if (copy_from_sockptr(&sin6, optval,
319 sizeof(struct sockaddr_in6))) {
325 rds_send_drop_to(rs, &sin6);
330 static int rds_set_bool_option(unsigned char *optvar, sockptr_t optval,
335 if (optlen < sizeof(int))
337 if (copy_from_sockptr(&value, optval, sizeof(int)))
343 static int rds_cong_monitor(struct rds_sock *rs, sockptr_t optval, int optlen)
347 ret = rds_set_bool_option(&rs->rs_cong_monitor, optval, optlen);
349 if (rs->rs_cong_monitor) {
350 rds_cong_add_socket(rs);
352 rds_cong_remove_socket(rs);
353 rs->rs_cong_mask = 0;
354 rs->rs_cong_notify = 0;
360 static int rds_set_transport(struct rds_sock *rs, sockptr_t optval, int optlen)
364 if (rs->rs_transport)
365 return -EOPNOTSUPP; /* previously attached to transport */
367 if (optlen != sizeof(int))
370 if (copy_from_sockptr(&t_type, optval, sizeof(t_type)))
373 if (t_type < 0 || t_type >= RDS_TRANS_COUNT)
376 rs->rs_transport = rds_trans_get(t_type);
378 return rs->rs_transport ? 0 : -ENOPROTOOPT;
381 static int rds_enable_recvtstamp(struct sock *sk, sockptr_t optval,
382 int optlen, int optname)
386 if (optlen != sizeof(int))
389 if (copy_from_sockptr(&val, optval, sizeof(int)))
392 valbool = val ? 1 : 0;
394 if (optname == SO_TIMESTAMP_NEW)
395 sock_set_flag(sk, SOCK_TSTAMP_NEW);
398 sock_set_flag(sk, SOCK_RCVTSTAMP);
400 sock_reset_flag(sk, SOCK_RCVTSTAMP);
405 static int rds_recv_track_latency(struct rds_sock *rs, sockptr_t optval,
408 struct rds_rx_trace_so trace;
411 if (optlen != sizeof(struct rds_rx_trace_so))
414 if (copy_from_sockptr(&trace, optval, sizeof(trace)))
417 if (trace.rx_traces > RDS_MSG_RX_DGRAM_TRACE_MAX)
420 rs->rs_rx_traces = trace.rx_traces;
421 for (i = 0; i < rs->rs_rx_traces; i++) {
422 if (trace.rx_trace_pos[i] >= RDS_MSG_RX_DGRAM_TRACE_MAX) {
423 rs->rs_rx_traces = 0;
426 rs->rs_rx_trace[i] = trace.rx_trace_pos[i];
432 static int rds_setsockopt(struct socket *sock, int level, int optname,
433 sockptr_t optval, unsigned int optlen)
435 struct rds_sock *rs = rds_sk_to_rs(sock->sk);
438 if (level != SOL_RDS) {
444 case RDS_CANCEL_SENT_TO:
445 ret = rds_cancel_sent_to(rs, optval, optlen);
448 ret = rds_get_mr(rs, optval, optlen);
450 case RDS_GET_MR_FOR_DEST:
451 ret = rds_get_mr_for_dest(rs, optval, optlen);
454 ret = rds_free_mr(rs, optval, optlen);
457 ret = rds_set_bool_option(&rs->rs_recverr, optval, optlen);
459 case RDS_CONG_MONITOR:
460 ret = rds_cong_monitor(rs, optval, optlen);
462 case SO_RDS_TRANSPORT:
464 ret = rds_set_transport(rs, optval, optlen);
465 release_sock(sock->sk);
467 case SO_TIMESTAMP_OLD:
468 case SO_TIMESTAMP_NEW:
470 ret = rds_enable_recvtstamp(sock->sk, optval, optlen, optname);
471 release_sock(sock->sk);
473 case SO_RDS_MSG_RXPATH_LATENCY:
474 ret = rds_recv_track_latency(rs, optval, optlen);
483 static int rds_getsockopt(struct socket *sock, int level, int optname,
484 char __user *optval, int __user *optlen)
486 struct rds_sock *rs = rds_sk_to_rs(sock->sk);
487 int ret = -ENOPROTOOPT, len;
490 if (level != SOL_RDS)
493 if (get_user(len, optlen)) {
499 case RDS_INFO_FIRST ... RDS_INFO_LAST:
500 ret = rds_info_getsockopt(sock, optname, optval,
505 if (len < sizeof(int))
508 if (put_user(rs->rs_recverr, (int __user *) optval) ||
509 put_user(sizeof(int), optlen))
514 case SO_RDS_TRANSPORT:
515 if (len < sizeof(int)) {
519 trans = (rs->rs_transport ? rs->rs_transport->t_type :
520 RDS_TRANS_NONE); /* unbound */
521 if (put_user(trans, (int __user *)optval) ||
522 put_user(sizeof(int), optlen))
536 static int rds_connect(struct socket *sock, struct sockaddr *uaddr,
537 int addr_len, int flags)
539 struct sock *sk = sock->sk;
540 struct sockaddr_in *sin;
541 struct rds_sock *rs = rds_sk_to_rs(sk);
544 if (addr_len < offsetofend(struct sockaddr, sa_family))
549 switch (uaddr->sa_family) {
551 sin = (struct sockaddr_in *)uaddr;
552 if (addr_len < sizeof(struct sockaddr_in)) {
556 if (sin->sin_addr.s_addr == htonl(INADDR_ANY)) {
560 if (ipv4_is_multicast(sin->sin_addr.s_addr) ||
561 sin->sin_addr.s_addr == htonl(INADDR_BROADCAST)) {
565 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &rs->rs_conn_addr);
566 rs->rs_conn_port = sin->sin_port;
569 #if IS_ENABLED(CONFIG_IPV6)
571 struct sockaddr_in6 *sin6;
574 sin6 = (struct sockaddr_in6 *)uaddr;
575 if (addr_len < sizeof(struct sockaddr_in6)) {
579 addr_type = ipv6_addr_type(&sin6->sin6_addr);
580 if (!(addr_type & IPV6_ADDR_UNICAST)) {
583 if (!(addr_type & IPV6_ADDR_MAPPED)) {
588 /* It is a mapped address. Need to do some sanity
591 addr4 = sin6->sin6_addr.s6_addr32[3];
592 if (addr4 == htonl(INADDR_ANY) ||
593 addr4 == htonl(INADDR_BROADCAST) ||
594 ipv4_is_multicast(addr4)) {
600 if (addr_type & IPV6_ADDR_LINKLOCAL) {
601 /* If socket is arleady bound to a link local address,
602 * the peer address must be on the same link.
604 if (sin6->sin6_scope_id == 0 ||
605 (!ipv6_addr_any(&rs->rs_bound_addr) &&
606 rs->rs_bound_scope_id &&
607 sin6->sin6_scope_id != rs->rs_bound_scope_id)) {
611 /* Remember the connected address scope ID. It will
612 * be checked against the binding local address when
613 * the socket is bound.
615 rs->rs_bound_scope_id = sin6->sin6_scope_id;
617 rs->rs_conn_addr = sin6->sin6_addr;
618 rs->rs_conn_port = sin6->sin6_port;
632 static struct proto rds_proto = {
634 .owner = THIS_MODULE,
635 .obj_size = sizeof(struct rds_sock),
638 static const struct proto_ops rds_proto_ops = {
640 .owner = THIS_MODULE,
641 .release = rds_release,
643 .connect = rds_connect,
644 .socketpair = sock_no_socketpair,
645 .accept = sock_no_accept,
646 .getname = rds_getname,
649 .listen = sock_no_listen,
650 .shutdown = sock_no_shutdown,
651 .setsockopt = rds_setsockopt,
652 .getsockopt = rds_getsockopt,
653 .sendmsg = rds_sendmsg,
654 .recvmsg = rds_recvmsg,
655 .mmap = sock_no_mmap,
656 .sendpage = sock_no_sendpage,
659 static void rds_sock_destruct(struct sock *sk)
661 struct rds_sock *rs = rds_sk_to_rs(sk);
663 WARN_ON((&rs->rs_item != rs->rs_item.next ||
664 &rs->rs_item != rs->rs_item.prev));
667 static int __rds_create(struct socket *sock, struct sock *sk, int protocol)
671 sock_init_data(sock, sk);
672 sock->ops = &rds_proto_ops;
673 sk->sk_protocol = protocol;
674 sk->sk_destruct = rds_sock_destruct;
676 rs = rds_sk_to_rs(sk);
677 spin_lock_init(&rs->rs_lock);
678 rwlock_init(&rs->rs_recv_lock);
679 INIT_LIST_HEAD(&rs->rs_send_queue);
680 INIT_LIST_HEAD(&rs->rs_recv_queue);
681 INIT_LIST_HEAD(&rs->rs_notify_queue);
682 INIT_LIST_HEAD(&rs->rs_cong_list);
683 rds_message_zcopy_queue_init(&rs->rs_zcookie_queue);
684 spin_lock_init(&rs->rs_rdma_lock);
685 rs->rs_rdma_keys = RB_ROOT;
686 rs->rs_rx_traces = 0;
690 spin_lock_bh(&rds_sock_lock);
691 list_add_tail(&rs->rs_item, &rds_sock_list);
693 spin_unlock_bh(&rds_sock_lock);
698 static int rds_create(struct net *net, struct socket *sock, int protocol,
703 if (sock->type != SOCK_SEQPACKET || protocol)
704 return -ESOCKTNOSUPPORT;
706 sk = sk_alloc(net, AF_RDS, GFP_KERNEL, &rds_proto, kern);
710 return __rds_create(sock, sk, protocol);
713 void rds_sock_addref(struct rds_sock *rs)
715 sock_hold(rds_rs_to_sk(rs));
718 void rds_sock_put(struct rds_sock *rs)
720 sock_put(rds_rs_to_sk(rs));
723 static const struct net_proto_family rds_family_ops = {
725 .create = rds_create,
726 .owner = THIS_MODULE,
729 static void rds_sock_inc_info(struct socket *sock, unsigned int len,
730 struct rds_info_iterator *iter,
731 struct rds_info_lengths *lens)
734 struct rds_incoming *inc;
735 unsigned int total = 0;
737 len /= sizeof(struct rds_info_message);
739 spin_lock_bh(&rds_sock_lock);
741 list_for_each_entry(rs, &rds_sock_list, rs_item) {
742 /* This option only supports IPv4 sockets. */
743 if (!ipv6_addr_v4mapped(&rs->rs_bound_addr))
746 read_lock(&rs->rs_recv_lock);
748 /* XXX too lazy to maintain counts.. */
749 list_for_each_entry(inc, &rs->rs_recv_queue, i_item) {
752 rds_inc_info_copy(inc, iter,
753 inc->i_saddr.s6_addr32[3],
754 rs->rs_bound_addr_v4,
758 read_unlock(&rs->rs_recv_lock);
761 spin_unlock_bh(&rds_sock_lock);
764 lens->each = sizeof(struct rds_info_message);
767 #if IS_ENABLED(CONFIG_IPV6)
768 static void rds6_sock_inc_info(struct socket *sock, unsigned int len,
769 struct rds_info_iterator *iter,
770 struct rds_info_lengths *lens)
772 struct rds_incoming *inc;
773 unsigned int total = 0;
776 len /= sizeof(struct rds6_info_message);
778 spin_lock_bh(&rds_sock_lock);
780 list_for_each_entry(rs, &rds_sock_list, rs_item) {
781 read_lock(&rs->rs_recv_lock);
783 list_for_each_entry(inc, &rs->rs_recv_queue, i_item) {
786 rds6_inc_info_copy(inc, iter, &inc->i_saddr,
787 &rs->rs_bound_addr, 1);
790 read_unlock(&rs->rs_recv_lock);
793 spin_unlock_bh(&rds_sock_lock);
796 lens->each = sizeof(struct rds6_info_message);
800 static void rds_sock_info(struct socket *sock, unsigned int len,
801 struct rds_info_iterator *iter,
802 struct rds_info_lengths *lens)
804 struct rds_info_socket sinfo;
805 unsigned int cnt = 0;
808 len /= sizeof(struct rds_info_socket);
810 spin_lock_bh(&rds_sock_lock);
812 if (len < rds_sock_count) {
813 cnt = rds_sock_count;
817 list_for_each_entry(rs, &rds_sock_list, rs_item) {
818 /* This option only supports IPv4 sockets. */
819 if (!ipv6_addr_v4mapped(&rs->rs_bound_addr))
821 sinfo.sndbuf = rds_sk_sndbuf(rs);
822 sinfo.rcvbuf = rds_sk_rcvbuf(rs);
823 sinfo.bound_addr = rs->rs_bound_addr_v4;
824 sinfo.connected_addr = rs->rs_conn_addr_v4;
825 sinfo.bound_port = rs->rs_bound_port;
826 sinfo.connected_port = rs->rs_conn_port;
827 sinfo.inum = sock_i_ino(rds_rs_to_sk(rs));
829 rds_info_copy(iter, &sinfo, sizeof(sinfo));
835 lens->each = sizeof(struct rds_info_socket);
837 spin_unlock_bh(&rds_sock_lock);
840 #if IS_ENABLED(CONFIG_IPV6)
841 static void rds6_sock_info(struct socket *sock, unsigned int len,
842 struct rds_info_iterator *iter,
843 struct rds_info_lengths *lens)
845 struct rds6_info_socket sinfo6;
848 len /= sizeof(struct rds6_info_socket);
850 spin_lock_bh(&rds_sock_lock);
852 if (len < rds_sock_count)
855 list_for_each_entry(rs, &rds_sock_list, rs_item) {
856 sinfo6.sndbuf = rds_sk_sndbuf(rs);
857 sinfo6.rcvbuf = rds_sk_rcvbuf(rs);
858 sinfo6.bound_addr = rs->rs_bound_addr;
859 sinfo6.connected_addr = rs->rs_conn_addr;
860 sinfo6.bound_port = rs->rs_bound_port;
861 sinfo6.connected_port = rs->rs_conn_port;
862 sinfo6.inum = sock_i_ino(rds_rs_to_sk(rs));
864 rds_info_copy(iter, &sinfo6, sizeof(sinfo6));
868 lens->nr = rds_sock_count;
869 lens->each = sizeof(struct rds6_info_socket);
871 spin_unlock_bh(&rds_sock_lock);
875 static void rds_exit(void)
877 sock_unregister(rds_family_ops.family);
878 proto_unregister(&rds_proto);
885 rds_bind_lock_destroy();
886 rds_info_deregister_func(RDS_INFO_SOCKETS, rds_sock_info);
887 rds_info_deregister_func(RDS_INFO_RECV_MESSAGES, rds_sock_inc_info);
888 #if IS_ENABLED(CONFIG_IPV6)
889 rds_info_deregister_func(RDS6_INFO_SOCKETS, rds6_sock_info);
890 rds_info_deregister_func(RDS6_INFO_RECV_MESSAGES, rds6_sock_inc_info);
893 module_exit(rds_exit);
897 static int rds_init(void)
901 net_get_random_once(&rds_gen_num, sizeof(rds_gen_num));
903 ret = rds_bind_lock_init();
907 ret = rds_conn_init();
911 ret = rds_threads_init();
914 ret = rds_sysctl_init();
917 ret = rds_stats_init();
920 ret = proto_register(&rds_proto, 1);
923 ret = sock_register(&rds_family_ops);
927 rds_info_register_func(RDS_INFO_SOCKETS, rds_sock_info);
928 rds_info_register_func(RDS_INFO_RECV_MESSAGES, rds_sock_inc_info);
929 #if IS_ENABLED(CONFIG_IPV6)
930 rds_info_register_func(RDS6_INFO_SOCKETS, rds6_sock_info);
931 rds_info_register_func(RDS6_INFO_RECV_MESSAGES, rds6_sock_inc_info);
937 proto_unregister(&rds_proto);
949 rds_bind_lock_destroy();
953 module_init(rds_init);
955 #define DRV_VERSION "4.0"
956 #define DRV_RELDATE "Feb 12, 2009"
958 MODULE_AUTHOR("Oracle Corporation <rds-devel@oss.oracle.com>");
959 MODULE_DESCRIPTION("RDS: Reliable Datagram Sockets"
960 " v" DRV_VERSION " (" DRV_RELDATE ")");
961 MODULE_VERSION(DRV_VERSION);
962 MODULE_LICENSE("Dual BSD/GPL");
963 MODULE_ALIAS_NETPROTO(PF_RDS);