diff options
Diffstat (limited to 'net/ipv4/af_inet.c')
| -rw-r--r-- | net/ipv4/af_inet.c | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index 52f5ecc58c4..20f52b5f5de 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -228,12 +228,14 @@ static int inet_create(struct socket *sock, int protocol) struct proto *answer_prot; unsigned char answer_flags; char answer_no_check; - int err; + int try_loading_module = 0; + int err = -ESOCKTNOSUPPORT; sock->state = SS_UNCONNECTED; /* Look for the requested type/protocol pair. */ answer = NULL; +lookup_protocol: rcu_read_lock(); list_for_each_rcu(p, &inetsw[sock->type]) { answer = list_entry(p, struct inet_protosw, list); @@ -254,9 +256,28 @@ static int inet_create(struct socket *sock, int protocol) answer = NULL; } - err = -ESOCKTNOSUPPORT; - if (!answer) - goto out_rcu_unlock; + if (unlikely(answer == NULL)) { + if (try_loading_module < 2) { + rcu_read_unlock(); + /* + * Be more specific, e.g. net-pf-2-proto-132-type-1 + * (net-pf-PF_INET-proto-IPPROTO_SCTP-type-SOCK_STREAM) + */ + if (++try_loading_module == 1) + request_module("net-pf-%d-proto-%d-type-%d", + PF_INET, protocol, sock->type); + /* + * Fall back to generic, e.g. net-pf-2-proto-132 + * (net-pf-PF_INET-proto-IPPROTO_SCTP) + */ + else + request_module("net-pf-%d-proto-%d", + PF_INET, protocol); + goto lookup_protocol; + } else + goto out_rcu_unlock; + } + err = -EPERM; if (answer->capability > 0 && !capable(answer->capability)) goto out_rcu_unlock; |