Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

[linux-2.6-omap-h63xx.git] / net / ipv6 / af_inet6.c

diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index e84b3fd17fb4de37e3212bd55892f132f38d6098..050e14b7f7014a2f61854af31defd1483a7eb234 100644 (file)
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -7,8 +7,6 @@
  *
  *     Adapted from linux/net/ipv4/af_inet.c
  *
- *     $Id: af_inet6.c,v 1.66 2002/02/01 22:01:04 davem Exp $
- *
  *     Fixes:
  *     piggy, Karl Knutson     :       Socket protocol table
  *     Hideaki YOSHIFUJI       :       sin6_scope_id support
@@ -52,6 +50,7 @@
 #include <net/ipip.h>
 #include <net/protocol.h>
 #include <net/inet_common.h>
+#include <net/route.h>
 #include <net/transp_v6.h>
 #include <net/ip6_route.h>
 #include <net/addrconf.h>
@@ -61,9 +60,7 @@
 
 #include <asm/uaccess.h>
 #include <asm/system.h>
-#ifdef CONFIG_IPV6_MROUTE
 #include <linux/mroute6.h>
-#endif
 
 MODULE_AUTHOR("Cast of dozens");
 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
@@ -87,7 +84,6 @@ static int inet6_create(struct net *net, struct socket *sock, int protocol)
        struct inet_sock *inet;
        struct ipv6_pinfo *np;
        struct sock *sk;
-       struct list_head *p;
        struct inet_protosw *answer;
        struct proto *answer_prot;
        unsigned char answer_flags;
@@ -101,13 +97,12 @@ static int inet6_create(struct net *net, struct socket *sock, int protocol)
                build_ehash_secret();
 
        /* 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);
+       list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
 
+               err = 0;
                /* Check the non-wild match. */
                if (protocol == answer->protocol) {
                        if (protocol != IPPROTO_IP)
@@ -122,10 +117,9 @@ lookup_protocol:
                                break;
                }
                err = -EPROTONOSUPPORT;
-               answer = NULL;
        }
 
-       if (!answer) {
+       if (err) {
                if (try_loading_module < 2) {
                        rcu_read_unlock();
                        /*
@@ -157,7 +151,7 @@ lookup_protocol:
        answer_flags = answer->flags;
        rcu_read_unlock();
 
-       BUG_TRAP(answer_prot->slab != NULL);
+       WARN_ON(answer_prot->slab == NULL);
 
        err = -ENOBUFS;
        sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot);
@@ -373,7 +367,7 @@ int inet6_release(struct socket *sock)
 
 EXPORT_SYMBOL(inet6_release);
 
-int inet6_destroy_sock(struct sock *sk)
+void inet6_destroy_sock(struct sock *sk)
 {
        struct ipv6_pinfo *np = inet6_sk(sk);
        struct sk_buff *skb;
@@ -391,8 +385,6 @@ int inet6_destroy_sock(struct sock *sk)
 
        if ((opt = xchg(&np->opt, NULL)) != NULL)
                sock_kfree_s(sk, opt, opt->tot_len);
-
-       return 0;
 }
 
 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
@@ -803,44 +795,43 @@ static void ipv6_packet_cleanup(void)
        dev_remove_pack(&ipv6_packet_type);
 }
 
-static int __init init_ipv6_mibs(void)
+static int __net_init ipv6_init_mibs(struct net *net)
 {
-       if (snmp_mib_init((void **)ipv6_statistics,
+       if (snmp_mib_init((void **)net->mib.udp_stats_in6,
+                         sizeof (struct udp_mib)) < 0)
+               return -ENOMEM;
+       if (snmp_mib_init((void **)net->mib.udplite_stats_in6,
+                         sizeof (struct udp_mib)) < 0)
+               goto err_udplite_mib;
+       if (snmp_mib_init((void **)net->mib.ipv6_statistics,
                          sizeof(struct ipstats_mib)) < 0)
                goto err_ip_mib;
-       if (snmp_mib_init((void **)icmpv6_statistics,
+       if (snmp_mib_init((void **)net->mib.icmpv6_statistics,
                          sizeof(struct icmpv6_mib)) < 0)
                goto err_icmp_mib;
-       if (snmp_mib_init((void **)icmpv6msg_statistics,
+       if (snmp_mib_init((void **)net->mib.icmpv6msg_statistics,
                          sizeof(struct icmpv6msg_mib)) < 0)
                goto err_icmpmsg_mib;
-       if (snmp_mib_init((void **)udp_stats_in6, sizeof (struct udp_mib)) < 0)
-               goto err_udp_mib;
-       if (snmp_mib_init((void **)udplite_stats_in6,
-                         sizeof (struct udp_mib)) < 0)
-               goto err_udplite_mib;
        return 0;
 
-err_udplite_mib:
-       snmp_mib_free((void **)udp_stats_in6);
-err_udp_mib:
-       snmp_mib_free((void **)icmpv6msg_statistics);
 err_icmpmsg_mib:
-       snmp_mib_free((void **)icmpv6_statistics);
+       snmp_mib_free((void **)net->mib.icmpv6_statistics);
 err_icmp_mib:
-       snmp_mib_free((void **)ipv6_statistics);
+       snmp_mib_free((void **)net->mib.ipv6_statistics);
 err_ip_mib:
+       snmp_mib_free((void **)net->mib.udplite_stats_in6);
+err_udplite_mib:
+       snmp_mib_free((void **)net->mib.udp_stats_in6);
        return -ENOMEM;
-
 }
 
-static void cleanup_ipv6_mibs(void)
+static void __net_exit ipv6_cleanup_mibs(struct net *net)
 {
-       snmp_mib_free((void **)ipv6_statistics);
-       snmp_mib_free((void **)icmpv6_statistics);
-       snmp_mib_free((void **)icmpv6msg_statistics);
-       snmp_mib_free((void **)udp_stats_in6);
-       snmp_mib_free((void **)udplite_stats_in6);
+       snmp_mib_free((void **)net->mib.udp_stats_in6);
+       snmp_mib_free((void **)net->mib.udplite_stats_in6);
+       snmp_mib_free((void **)net->mib.ipv6_statistics);
+       snmp_mib_free((void **)net->mib.icmpv6_statistics);
+       snmp_mib_free((void **)net->mib.icmpv6msg_statistics);
 }
 
 static int inet6_net_init(struct net *net)
@@ -848,16 +839,11 @@ static int inet6_net_init(struct net *net)
        int err = 0;
 
        net->ipv6.sysctl.bindv6only = 0;
-       net->ipv6.sysctl.flush_delay = 0;
-       net->ipv6.sysctl.ip6_rt_max_size = 4096;
-       net->ipv6.sysctl.ip6_rt_gc_min_interval = HZ / 2;
-       net->ipv6.sysctl.ip6_rt_gc_timeout = 60*HZ;
-       net->ipv6.sysctl.ip6_rt_gc_interval = 30*HZ;
-       net->ipv6.sysctl.ip6_rt_gc_elasticity = 9;
-       net->ipv6.sysctl.ip6_rt_mtu_expires = 10*60*HZ;
-       net->ipv6.sysctl.ip6_rt_min_advmss = IPV6_MIN_MTU - 20 - 40;
        net->ipv6.sysctl.icmpv6_time = 1*HZ;
 
+       err = ipv6_init_mibs(net);
+       if (err)
+               return err;
 #ifdef CONFIG_PROC_FS
        err = udp6_proc_init(net);
        if (err)
@@ -868,7 +854,6 @@ static int inet6_net_init(struct net *net)
        err = ac6_proc_init(net);
        if (err)
                goto proc_ac6_fail;
-out:
 #endif
        return err;
 
@@ -877,7 +862,9 @@ proc_ac6_fail:
        tcp6_proc_exit(net);
 proc_tcp6_fail:
        udp6_proc_exit(net);
-       goto out;
+out:
+       ipv6_cleanup_mibs(net);
+       return err;
 #endif
 }
 
@@ -888,6 +875,7 @@ static void inet6_net_exit(struct net *net)
        tcp6_proc_exit(net);
        ac6_proc_exit(net);
 #endif
+       ipv6_cleanup_mibs(net);
 }
 
 static struct pernet_operations inet6_net_ops = {
@@ -938,11 +926,11 @@ static int __init inet6_init(void)
        if (err)
                goto out_sock_register_fail;
 
-       /* Initialise ipv6 mibs */
-       err = init_ipv6_mibs();
+#ifdef CONFIG_SYSCTL
+       err = ipv6_static_sysctl_register();
        if (err)
-               goto out_unregister_sock;
-
+               goto static_sysctl_fail;
+#endif
        /*
         *      ipngwg API draft makes clear that the correct semantics
         *      for TCP and UDP is to consider one TCP and UDP instance
@@ -956,9 +944,9 @@ static int __init inet6_init(void)
        err = icmpv6_init();
        if (err)
                goto icmp_fail;
-#ifdef CONFIG_IPV6_MROUTE
-       ip6_mr_init();
-#endif
+       err = ip6_mr_init();
+       if (err)
+               goto ipmr_fail;
        err = ndisc_init();
        if (err)
                goto ndisc_fail;
@@ -1061,12 +1049,16 @@ netfilter_fail:
 igmp_fail:
        ndisc_cleanup();
 ndisc_fail:
+       ip6_mr_cleanup();
+ipmr_fail:
        icmpv6_cleanup();
 icmp_fail:
        unregister_pernet_subsys(&inet6_net_ops);
 register_pernet_fail:
-       cleanup_ipv6_mibs();
-out_unregister_sock:
+#ifdef CONFIG_SYSCTL
+       ipv6_static_sysctl_unregister();
+static_sysctl_fail:
+#endif
        sock_unregister(PF_INET6);
        rtnl_unregister_all(PF_INET6);
 out_sock_register_fail:
@@ -1115,11 +1107,14 @@ static void __exit inet6_exit(void)
        ipv6_netfilter_fini();
        igmp6_cleanup();
        ndisc_cleanup();
+       ip6_mr_cleanup();
        icmpv6_cleanup();
        rawv6_exit();
 
        unregister_pernet_subsys(&inet6_net_ops);
-       cleanup_ipv6_mibs();
+#ifdef CONFIG_SYSCTL
+       ipv6_static_sysctl_unregister();
+#endif
        proto_unregister(&rawv6_prot);
        proto_unregister(&udplitev6_prot);
        proto_unregister(&udpv6_prot);