ftrace: Documentation

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

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 48534c6c073538a652e873f78bb4be1abbda2909..7ff687020fa9ee780042ddeeb080e3ebb20f8199 100644 (file)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -240,7 +240,7 @@ static inline int rt6_need_strict(struct in6_addr *daddr)
 static inline struct rt6_info *rt6_device_match(struct net *net,
                                                    struct rt6_info *rt,
                                                    int oif,
-                                                   int strict)
+                                                   int flags)
 {
        struct rt6_info *local = NULL;
        struct rt6_info *sprt;
@@ -253,7 +253,7 @@ static inline struct rt6_info *rt6_device_match(struct net *net,
                        if (dev->flags & IFF_LOOPBACK) {
                                if (sprt->rt6i_idev == NULL ||
                                    sprt->rt6i_idev->dev->ifindex != oif) {
-                                       if (strict && oif)
+                                       if (flags & RT6_LOOKUP_F_IFACE && oif)
                                                continue;
                                        if (local && (!oif ||
                                                      local->rt6i_idev->dev->ifindex == oif))
@@ -266,7 +266,7 @@ static inline struct rt6_info *rt6_device_match(struct net *net,
                if (local)
                        return local;
 
-               if (strict)
+               if (flags & RT6_LOOKUP_F_IFACE)
                        return net->ipv6.ip6_null_entry;
        }
        return rt;
@@ -446,7 +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)) {
@@ -472,13 +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 - 1) {
-               /* 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;
@@ -506,7 +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;
@@ -2202,8 +2196,12 @@ 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_flags & RTF_EXPIRES) ?
-                       rt->rt6i_expires - jiffies : 0;
+       if (!(rt->rt6i_flags & RTF_EXPIRES))
+               expires = 0;
+       else if (rt->rt6i_expires - jiffies < INT_MAX)
+               expires = rt->rt6i_expires - jiffies;
+       else
+               expires = INT_MAX;
 
        if (rtnl_put_cacheinfo(skb, &rt->u.dst, 0, 0, 0,
                               expires, rt->u.dst.error) < 0)