Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

[linux-2.6] / net / ipv6 / route.c

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index cd82b6db35ff34ab9bf45d7706d9eb5230e9b4ff..220cffe9e63b483354ff8015b8929a9b4b01ffe6 100644 (file)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -36,6 +36,7 @@
 #include <linux/route.h>
 #include <linux/netdevice.h>
 #include <linux/in6.h>
+#include <linux/mroute6.h>
 #include <linux/init.h>
 #include <linux/if_arp.h>
 #include <linux/proc_fs.h>
@@ -108,7 +109,7 @@ static struct dst_ops ip6_dst_ops_template = {
        .negative_advice        =       ip6_negative_advice,
        .link_failure           =       ip6_link_failure,
        .update_pmtu            =       ip6_rt_update_pmtu,
-       .local_out              =       ip6_local_out,
+       .local_out              =       __ip6_local_out,
        .entry_size             =       sizeof(struct rt6_info),
        .entries                =       ATOMIC_INIT(0),
 };
@@ -149,7 +150,7 @@ static struct rt6_info ip6_null_entry_template = {
 static int ip6_pkt_prohibit(struct sk_buff *skb);
 static int ip6_pkt_prohibit_out(struct sk_buff *skb);
 
-struct rt6_info ip6_prohibit_entry_template = {
+static struct rt6_info ip6_prohibit_entry_template = {
        .u = {
                .dst = {
                        .__refcnt       = ATOMIC_INIT(1),
@@ -445,7 +446,7 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
        struct route_info *rinfo = (struct route_info *) opt;
        struct in6_addr prefix_buf, *prefix;
        unsigned int pref;
-       u32 lifetime;
+       unsigned long lifetime;
        struct rt6_info *rt;
 
        if (len < sizeof(struct route_info)) {
@@ -471,13 +472,7 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
        if (pref == ICMPV6_ROUTER_PREF_INVALID)
                pref = ICMPV6_ROUTER_PREF_MEDIUM;
 
-       lifetime = ntohl(rinfo->lifetime);
-       if (lifetime == 0xffffffff) {
-               /* infinity */
-       } else if (lifetime > 0x7fffffff/HZ) {
-               /* Avoid arithmetic overflow */
-               lifetime = 0x7fffffff/HZ - 1;
-       }
+       lifetime = addrconf_timeout_fixup(ntohl(rinfo->lifetime), HZ);
 
        if (rinfo->length == 3)
                prefix = (struct in6_addr *)rinfo->prefix;
@@ -505,7 +500,7 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
                                 (rt->rt6i_flags & ~RTF_PREF_MASK) | RTF_PREF(pref);
 
        if (rt) {
-               if (lifetime == 0xffffffff) {
+               if (!addrconf_finite_timeout(lifetime)) {
                        rt->rt6i_flags &= ~RTF_EXPIRES;
                } else {
                        rt->rt6i_expires = jiffies + HZ * lifetime;
@@ -555,8 +550,8 @@ out:
 
 }
 
-struct rt6_info *rt6_lookup(struct net *net, struct in6_addr *daddr,
-                           struct in6_addr *saddr, int oif, int strict)
+struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr,
+                           const struct in6_addr *saddr, int oif, int strict)
 {
        struct flowi fl = {
                .oif = oif,
@@ -924,7 +919,7 @@ static DEFINE_SPINLOCK(icmp6_dst_lock);
 
 struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
                                  struct neighbour *neigh,
-                                 struct in6_addr *addr)
+                                 const struct in6_addr *addr)
 {
        struct rt6_info *rt;
        struct inet6_dev *idev = in6_dev_get(dev);
@@ -1105,7 +1100,9 @@ int ip6_route_add(struct fib6_config *cfg)
        }
 
        rt->u.dst.obsolete = -1;
-       rt->rt6i_expires = jiffies + clock_t_to_jiffies(cfg->fc_expires);
+       rt->rt6i_expires = (cfg->fc_flags & RTF_EXPIRES) ?
+                               jiffies + clock_t_to_jiffies(cfg->fc_expires) :
+                               0;
 
        if (cfg->fc_protocol == RTPROT_UNSPEC)
                cfg->fc_protocol = RTPROT_BOOT;
@@ -1242,11 +1239,11 @@ install_route:
                }
        }
 
-       if (rt->u.dst.metrics[RTAX_HOPLIMIT-1] == 0)
+       if (dst_metric(&rt->u.dst, RTAX_HOPLIMIT) == 0)
                rt->u.dst.metrics[RTAX_HOPLIMIT-1] = -1;
-       if (!rt->u.dst.metrics[RTAX_MTU-1])
+       if (!dst_metric(&rt->u.dst, RTAX_MTU))
                rt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(dev);
-       if (!rt->u.dst.metrics[RTAX_ADVMSS-1])
+       if (!dst_metric(&rt->u.dst, RTAX_ADVMSS))
                rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, dst_mtu(&rt->u.dst));
        rt->u.dst.dev = dev;
        rt->rt6i_idev = idev;
@@ -1699,8 +1696,6 @@ struct rt6_info *rt6_get_dflt_router(struct in6_addr *addr, struct net_device *d
        return rt;
 }
 
-EXPORT_SYMBOL(rt6_get_dflt_router);
-
 struct rt6_info *rt6_add_dflt_router(struct in6_addr *gwaddr,
                                     struct net_device *dev,
                                     unsigned int pref)
@@ -2106,7 +2101,7 @@ static inline size_t rt6_nlmsg_size(void)
 static int rt6_fill_node(struct sk_buff *skb, struct rt6_info *rt,
                         struct in6_addr *dst, struct in6_addr *src,
                         int iif, int type, u32 pid, u32 seq,
-                        int prefix, unsigned int flags)
+                        int prefix, int nowait, unsigned int flags)
 {
        struct rtmsg *rtm;
        struct nlmsghdr *nlh;
@@ -2166,9 +2161,24 @@ static int rt6_fill_node(struct sk_buff *skb, struct rt6_info *rt,
        } else if (rtm->rtm_src_len)
                NLA_PUT(skb, RTA_SRC, 16, &rt->rt6i_src.addr);
 #endif
-       if (iif)
-               NLA_PUT_U32(skb, RTA_IIF, iif);
-       else if (dst) {
+       if (iif) {
+#ifdef CONFIG_IPV6_MROUTE
+               if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr)) {
+                       int err = ip6mr_get_route(skb, rtm, nowait);
+                       if (err <= 0) {
+                               if (!nowait) {
+                                       if (err == 0)
+                                               return 0;
+                                       goto nla_put_failure;
+                               } else {
+                                       if (err == -EMSGSIZE)
+                                               goto nla_put_failure;
+                               }
+                       }
+               } else
+#endif
+                       NLA_PUT_U32(skb, RTA_IIF, iif);
+       } else if (dst) {
                struct in6_addr saddr_buf;
                if (ipv6_dev_get_saddr(ip6_dst_idev(&rt->u.dst)->dev,
                                       dst, 0, &saddr_buf) == 0)
@@ -2186,7 +2196,9 @@ static int rt6_fill_node(struct sk_buff *skb, struct rt6_info *rt,
 
        NLA_PUT_U32(skb, RTA_PRIORITY, rt->rt6i_metric);
 
-       expires = rt->rt6i_expires ? rt->rt6i_expires - jiffies : 0;
+       expires = (rt->rt6i_flags & RTF_EXPIRES) ?
+                       rt->rt6i_expires - jiffies : 0;
+
        if (rtnl_put_cacheinfo(skb, &rt->u.dst, 0, 0, 0,
                               expires, rt->u.dst.error) < 0)
                goto nla_put_failure;
@@ -2211,7 +2223,7 @@ int rt6_dump_route(struct rt6_info *rt, void *p_arg)
 
        return rt6_fill_node(arg->skb, rt, NULL, NULL, 0, RTM_NEWROUTE,
                     NETLINK_CB(arg->cb->skb).pid, arg->cb->nlh->nlmsg_seq,
-                    prefix, NLM_F_MULTI);
+                    prefix, 0, NLM_F_MULTI);
 }
 
 static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)
@@ -2277,7 +2289,7 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
 
        err = rt6_fill_node(skb, rt, &fl.fl6_dst, &fl.fl6_src, iif,
                            RTM_NEWROUTE, NETLINK_CB(in_skb).pid,
-                           nlh->nlmsg_seq, 0, 0);
+                           nlh->nlmsg_seq, 0, 0, 0);
        if (err < 0) {
                kfree_skb(skb);
                goto errout;
@@ -2303,7 +2315,7 @@ void inet6_rt_notify(int event, struct rt6_info *rt, struct nl_info *info)
                goto errout;
 
        err = rt6_fill_node(skb, rt, NULL, NULL, 0,
-                               event, info->pid, seq, 0, 0);
+                               event, info->pid, seq, 0, 0, 0);
        if (err < 0) {
                /* -EMSGSIZE implies BUG in rt6_nlmsg_size() */
                WARN_ON(err == -EMSGSIZE);
@@ -2600,15 +2612,14 @@ struct ctl_table *ipv6_route_sysctl_init(struct net *net)
 
 static int ip6_route_net_init(struct net *net)
 {
-       int ret = 0;
+       int ret = -ENOMEM;
 
-       ret = -ENOMEM;
        net->ipv6.ip6_dst_ops = kmemdup(&ip6_dst_ops_template,
                                        sizeof(*net->ipv6.ip6_dst_ops),
                                        GFP_KERNEL);
        if (!net->ipv6.ip6_dst_ops)
                goto out;
-       net->ipv6.ip6_dst_ops->dst_net = net;
+       net->ipv6.ip6_dst_ops->dst_net = hold_net(net);
 
        net->ipv6.ip6_null_entry = kmemdup(&ip6_null_entry_template,
                                           sizeof(*net->ipv6.ip6_null_entry),
@@ -2655,6 +2666,7 @@ out:
        return ret;
 
 out_ip6_dst_ops:
+       release_net(net->ipv6.ip6_dst_ops->dst_net);
        kfree(net->ipv6.ip6_dst_ops);
        goto out;
 }
@@ -2670,6 +2682,7 @@ static void ip6_route_net_exit(struct net *net)
        kfree(net->ipv6.ip6_prohibit_entry);
        kfree(net->ipv6.ip6_blk_hole_entry);
 #endif
+       release_net(net->ipv6.ip6_dst_ops->dst_net);
        kfree(net->ipv6.ip6_dst_ops);
 }