diff options
Diffstat (limited to 'net/ipv6/af_inet6.c')
-rw-r--r-- | net/ipv6/af_inet6.c | 55 |
1 files changed, 39 insertions, 16 deletions
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index 4f8795af2ed..d9546380fa0 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -92,10 +92,13 @@ static int inet6_create(struct socket *sock, int protocol) struct proto *answer_prot; unsigned char answer_flags; char answer_no_check; - int rc; + int try_loading_module = 0; + int err; /* Look for the requested type/protocol pair. */ answer = NULL; +lookup_protocol: + err = -ESOCKTNOSUPPORT; rcu_read_lock(); list_for_each_rcu(p, &inetsw6[sock->type]) { answer = list_entry(p, struct inet_protosw, list); @@ -113,21 +116,37 @@ static int inet6_create(struct socket *sock, int protocol) if (IPPROTO_IP == answer->protocol) break; } + err = -EPROTONOSUPPORT; answer = NULL; } - rc = -ESOCKTNOSUPPORT; - if (!answer) - goto out_rcu_unlock; - rc = -EPERM; + if (!answer) { + if (try_loading_module < 2) { + rcu_read_unlock(); + /* + * Be more specific, e.g. net-pf-10-proto-132-type-1 + * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM) + */ + if (++try_loading_module == 1) + request_module("net-pf-%d-proto-%d-type-%d", + PF_INET6, protocol, sock->type); + /* + * Fall back to generic, e.g. net-pf-10-proto-132 + * (net-pf-PF_INET6-proto-IPPROTO_SCTP) + */ + else + request_module("net-pf-%d-proto-%d", + PF_INET6, protocol); + goto lookup_protocol; + } else + goto out_rcu_unlock; + } + + err = -EPERM; if (answer->capability > 0 && !capable(answer->capability)) goto out_rcu_unlock; - rc = -EPROTONOSUPPORT; - if (!protocol) - goto out_rcu_unlock; sock->ops = answer->ops; - answer_prot = answer->prot; answer_no_check = answer->no_check; answer_flags = answer->flags; @@ -135,14 +154,14 @@ static int inet6_create(struct socket *sock, int protocol) BUG_TRAP(answer_prot->slab != NULL); - rc = -ENOBUFS; + err = -ENOBUFS; sk = sk_alloc(PF_INET6, GFP_KERNEL, answer_prot, 1); if (sk == NULL) goto out; sock_init_data(sock, sk); - rc = 0; + err = 0; sk->sk_no_check = answer_no_check; if (INET_PROTOSW_REUSE & answer_flags) sk->sk_reuse = 1; @@ -202,14 +221,14 @@ static int inet6_create(struct socket *sock, int protocol) sk->sk_prot->hash(sk); } if (sk->sk_prot->init) { - rc = sk->sk_prot->init(sk); - if (rc) { + err = sk->sk_prot->init(sk); + if (err) { sk_common_release(sk); goto out; } } out: - return rc; + return err; out_rcu_unlock: rcu_read_unlock(); goto out; @@ -699,12 +718,14 @@ static int __init inet6_init(void) /* Register the family here so that the init calls below will * be able to create sockets. (?? is this dangerous ??) */ - (void) sock_register(&inet6_family_ops); + err = sock_register(&inet6_family_ops); + if (err) + goto out_unregister_raw_proto; /* Initialise ipv6 mibs */ err = init_ipv6_mibs(); if (err) - goto out_unregister_raw_proto; + goto out_unregister_sock; /* * ipngwg API draft makes clear that the correct semantics @@ -796,6 +817,8 @@ icmp_fail: ipv6_sysctl_unregister(); #endif cleanup_ipv6_mibs(); +out_unregister_sock: + sock_unregister(PF_INET6); out_unregister_raw_proto: proto_unregister(&rawv6_prot); out_unregister_udp_proto: |