summaryrefslogtreecommitdiff
path: root/net/sctp/protocol.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/sctp/protocol.c')
-rw-r--r--net/sctp/protocol.c129
1 files changed, 84 insertions, 45 deletions
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 25be8f04de6e..beea2fb18b15 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -995,6 +995,58 @@ static void cleanup_sctp_mibs(void)
free_percpu(sctp_statistics[1]);
}
+static void sctp_v4_pf_init(void)
+{
+ /* Initialize the SCTP specific PF functions. */
+ sctp_register_pf(&sctp_pf_inet, PF_INET);
+ sctp_register_af(&sctp_af_inet);
+}
+
+static void sctp_v4_pf_exit(void)
+{
+ list_del(&sctp_af_inet.list);
+}
+
+static int sctp_v4_protosw_init(void)
+{
+ int rc;
+
+ rc = proto_register(&sctp_prot, 1);
+ if (rc)
+ return rc;
+
+ /* Register SCTP(UDP and TCP style) with socket layer. */
+ inet_register_protosw(&sctp_seqpacket_protosw);
+ inet_register_protosw(&sctp_stream_protosw);
+
+ return 0;
+}
+
+static void sctp_v4_protosw_exit(void)
+{
+ inet_unregister_protosw(&sctp_stream_protosw);
+ inet_unregister_protosw(&sctp_seqpacket_protosw);
+ proto_unregister(&sctp_prot);
+}
+
+static int sctp_v4_add_protocol(void)
+{
+ /* Register notifier for inet address additions/deletions. */
+ register_inetaddr_notifier(&sctp_inetaddr_notifier);
+
+ /* Register SCTP with inet layer. */
+ if (inet_add_protocol(&sctp_protocol, IPPROTO_SCTP) < 0)
+ return -EAGAIN;
+
+ return 0;
+}
+
+static void sctp_v4_del_protocol(void)
+{
+ inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
+ unregister_inetaddr_notifier(&sctp_inetaddr_notifier);
+}
+
/* Initialize the universe into something sensible. */
SCTP_STATIC __init int sctp_init(void)
{
@@ -1038,8 +1090,6 @@ SCTP_STATIC __init int sctp_init(void)
/* Initialize object count debugging. */
sctp_dbg_objcnt_init();
- /* Initialize the SCTP specific PF functions. */
- sctp_register_pf(&sctp_pf_inet, PF_INET);
/*
* 14. Suggested SCTP Protocol Parameter Values
*/
@@ -1197,19 +1247,22 @@ SCTP_STATIC __init int sctp_init(void)
sctp_sysctl_register();
INIT_LIST_HEAD(&sctp_address_families);
- sctp_register_af(&sctp_af_inet);
+ sctp_v4_pf_init();
+ sctp_v6_pf_init();
- status = proto_register(&sctp_prot, 1);
- if (status)
- goto err_proto_register;
+ /* Initialize the local address list. */
+ INIT_LIST_HEAD(&sctp_local_addr_list);
+ spin_lock_init(&sctp_local_addr_lock);
+ sctp_get_local_addr_list();
- /* Register SCTP(UDP and TCP style) with socket layer. */
- inet_register_protosw(&sctp_seqpacket_protosw);
- inet_register_protosw(&sctp_stream_protosw);
+ status = sctp_v4_protosw_init();
- status = sctp_v6_init();
if (status)
- goto err_v6_init;
+ goto err_protosw_init;
+
+ status = sctp_v6_protosw_init();
+ if (status)
+ goto err_v6_protosw_init;
/* Initialize the control inode/socket for handling OOTB packets. */
if ((status = sctp_ctl_sock_init())) {
@@ -1218,19 +1271,9 @@ SCTP_STATIC __init int sctp_init(void)
goto err_ctl_sock_init;
}
- /* Initialize the local address list. */
- INIT_LIST_HEAD(&sctp_local_addr_list);
- spin_lock_init(&sctp_local_addr_lock);
- sctp_get_local_addr_list();
-
- /* Register notifier for inet address additions/deletions. */
- register_inetaddr_notifier(&sctp_inetaddr_notifier);
-
- /* Register SCTP with inet layer. */
- if (inet_add_protocol(&sctp_protocol, IPPROTO_SCTP) < 0) {
- status = -EAGAIN;
+ status = sctp_v4_add_protocol();
+ if (status)
goto err_add_protocol;
- }
/* Register SCTP with inet6 layer. */
status = sctp_v6_add_protocol();
@@ -1241,18 +1284,18 @@ SCTP_STATIC __init int sctp_init(void)
out:
return status;
err_v6_add_protocol:
- inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
- unregister_inetaddr_notifier(&sctp_inetaddr_notifier);
+ sctp_v6_del_protocol();
err_add_protocol:
- sctp_free_local_addr_list();
+ sctp_v4_del_protocol();
sock_release(sctp_ctl_socket);
err_ctl_sock_init:
- sctp_v6_exit();
-err_v6_init:
- inet_unregister_protosw(&sctp_stream_protosw);
- inet_unregister_protosw(&sctp_seqpacket_protosw);
- proto_unregister(&sctp_prot);
-err_proto_register:
+ sctp_v6_protosw_exit();
+err_v6_protosw_init:
+ sctp_v4_protosw_exit();
+err_protosw_init:
+ sctp_free_local_addr_list();
+ sctp_v4_pf_exit();
+ sctp_v6_pf_exit();
sctp_sysctl_unregister();
list_del(&sctp_af_inet.list);
free_pages((unsigned long)sctp_port_hashtable,
@@ -1285,23 +1328,21 @@ SCTP_STATIC __exit void sctp_exit(void)
/* Unregister with inet6/inet layers. */
sctp_v6_del_protocol();
- inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
-
- /* Unregister notifier for inet address additions/deletions. */
- unregister_inetaddr_notifier(&sctp_inetaddr_notifier);
-
- /* Free the local address list. */
- sctp_free_local_addr_list();
+ sctp_v4_del_protocol();
/* Free the control endpoint. */
sock_release(sctp_ctl_socket);
- /* Cleanup v6 initializations. */
- sctp_v6_exit();
+ /* Free protosw registrations */
+ sctp_v6_protosw_exit();
+ sctp_v4_protosw_exit();
+
+ /* Free the local address list. */
+ sctp_free_local_addr_list();
/* Unregister with socket layer. */
- inet_unregister_protosw(&sctp_stream_protosw);
- inet_unregister_protosw(&sctp_seqpacket_protosw);
+ sctp_v6_pf_exit();
+ sctp_v4_pf_exit();
sctp_sysctl_unregister();
list_del(&sctp_af_inet.list);
@@ -1320,8 +1361,6 @@ SCTP_STATIC __exit void sctp_exit(void)
kmem_cache_destroy(sctp_chunk_cachep);
kmem_cache_destroy(sctp_bucket_cachep);
-
- proto_unregister(&sctp_prot);
}
module_init(sctp_init);