diff options
Diffstat (limited to 'net/dccp/ipv4.c')
| -rw-r--r-- | net/dccp/ipv4.c | 65 |
1 files changed, 29 insertions, 36 deletions
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c index 3fe958e..f53bce5 100644 --- a/net/dccp/ipv4.c +++ b/net/dccp/ipv4.c @@ -32,6 +32,13 @@ #include "dccp.h" #include "feat.h" +/* + * This is the global socket data structure used for responding to + * the Out-of-the-blue (OOTB) packets. A control sock will be created + * for this socket at the initialization time. + */ +static struct socket *dccp_v4_ctl_socket; + static int dccp_v4_get_port(struct sock *sk, const unsigned short snum) { return inet_csk_get_port(&dccp_hashinfo, sk, snum, @@ -226,11 +233,11 @@ static void dccp_v4_ctl_send_ack(struct sk_buff *rxskb) dccp_hdr_set_ack(dccp_hdr_ack_bits(skb), DCCP_SKB_CB(rxskb)->dccpd_seq); - bh_lock_sock(dccp_ctl_socket->sk); - err = ip_build_and_send_pkt(skb, dccp_ctl_socket->sk, + bh_lock_sock(dccp_v4_ctl_socket->sk); + err = ip_build_and_send_pkt(skb, dccp_v4_ctl_socket->sk, rxskb->nh.iph->daddr, rxskb->nh.iph->saddr, NULL); - bh_unlock_sock(dccp_ctl_socket->sk); + bh_unlock_sock(dccp_v4_ctl_socket->sk); if (err == NET_XMIT_CN || err == 0) { DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS); @@ -704,7 +711,7 @@ static void dccp_v4_ctl_send_reset(struct sk_buff *rxskb) if (((struct rtable *)rxskb->dst)->rt_type != RTN_LOCAL) return; - dst = dccp_v4_route_skb(dccp_ctl_socket->sk, rxskb); + dst = dccp_v4_route_skb(dccp_v4_ctl_socket->sk, rxskb); if (dst == NULL) return; @@ -741,11 +748,11 @@ static void dccp_v4_ctl_send_reset(struct sk_buff *rxskb) dh->dccph_checksum = dccp_v4_checksum(skb, rxskb->nh.iph->saddr, rxskb->nh.iph->daddr); - bh_lock_sock(dccp_ctl_socket->sk); - err = ip_build_and_send_pkt(skb, dccp_ctl_socket->sk, + bh_lock_sock(dccp_v4_ctl_socket->sk); + err = ip_build_and_send_pkt(skb, dccp_v4_ctl_socket->sk, rxskb->nh.iph->daddr, rxskb->nh.iph->saddr, NULL); - bh_unlock_sock(dccp_ctl_socket->sk); + bh_unlock_sock(dccp_v4_ctl_socket->sk); if (err == NET_XMIT_CN || err == 0) { DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS); @@ -997,10 +1004,15 @@ static struct inet_connection_sock_af_ops dccp_ipv4_af_ops = { static int dccp_v4_init_sock(struct sock *sk) { - const int err = dccp_init_sock(sk); + static __u8 dccp_v4_ctl_sock_initialized; + int err = dccp_init_sock(sk, dccp_v4_ctl_sock_initialized); - if (err == 0) + if (err == 0) { + if (unlikely(!dccp_v4_ctl_sock_initialized)) + dccp_v4_ctl_sock_initialized = 1; inet_csk(sk)->icsk_af_ops = &dccp_ipv4_af_ops; + } + return err; } @@ -1087,48 +1099,29 @@ static struct inet_protosw dccp_v4_protosw = { .flags = INET_PROTOSW_ICSK, }; -/* - * This is the global socket data structure used for responding to - * the Out-of-the-blue (OOTB) packets. A control sock will be created - * for this socket at the initialization time. - */ -struct socket *dccp_ctl_socket; - -static char dccp_ctl_socket_err_msg[] __initdata = +static char dccp_v4_ctl_socket_err_msg[] __initdata = KERN_ERR "DCCP: Failed to create the control socket.\n"; -static int __init dccp_ctl_sock_init(void) +static int __init dccp_v4_ctl_sock_init(void) { int rc = sock_create_kern(PF_INET, SOCK_DCCP, IPPROTO_DCCP, - &dccp_ctl_socket); + &dccp_v4_ctl_socket); if (rc < 0) - printk(dccp_ctl_socket_err_msg); + printk(dccp_v4_ctl_socket_err_msg); else { - dccp_ctl_socket->sk->sk_allocation = GFP_ATOMIC; - inet_sk(dccp_ctl_socket->sk)->uc_ttl = -1; + dccp_v4_ctl_socket->sk->sk_allocation = GFP_ATOMIC; + inet_sk(dccp_v4_ctl_socket->sk)->uc_ttl = -1; /* Unhash it so that IP input processing does not even * see it, we do not wish this socket to see incoming * packets. */ - dccp_ctl_socket->sk->sk_prot->unhash(dccp_ctl_socket->sk); + dccp_v4_ctl_socket->sk->sk_prot->unhash(dccp_v4_ctl_socket->sk); } return rc; } -#ifdef CONFIG_IP_DCCP_UNLOAD_HACK -void dccp_ctl_sock_exit(void) -{ - if (dccp_ctl_socket != NULL) { - sock_release(dccp_ctl_socket); - dccp_ctl_socket = NULL; - } -} - -EXPORT_SYMBOL_GPL(dccp_ctl_sock_exit); -#endif - static int __init dccp_v4_init(void) { int err = proto_register(&dccp_v4_prot, 1); @@ -1142,7 +1135,7 @@ static int __init dccp_v4_init(void) inet_register_protosw(&dccp_v4_protosw); - err = dccp_ctl_sock_init(); + err = dccp_v4_ctl_sock_init(); if (err) goto out_unregister_protosw; out: |