diff options
| -rw-r--r-- | net/ipv6/route.c | 33 |
1 files changed, 18 insertions, 15 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index e8855706980..5b58a516bb1 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -1221,21 +1221,24 @@ void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr, 2. It is gatewayed route or NONEXTHOP route. Action: clone it. */ if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) { - nrt = rt6_cow(rt, daddr, saddr, NULL); - if (!nrt->u.dst.error) { - nrt->u.dst.metrics[RTAX_MTU-1] = pmtu; - if (allfrag) - nrt->u.dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG; - /* According to RFC 1981, detecting PMTU increase shouldn't be - happened within 5 mins, the recommended timer is 10 mins. - Here this route expiration time is set to ip6_rt_mtu_expires - which is 10 mins. After 10 mins the decreased pmtu is expired - and detecting PMTU increase will be automatically happened. - */ - dst_set_expires(&nrt->u.dst, ip6_rt_mtu_expires); - nrt->rt6i_flags |= RTF_DYNAMIC|RTF_EXPIRES; - } - dst_release(&nrt->u.dst); + nrt = rt6_alloc_cow(rt, daddr, saddr); + if (!nrt) + goto out; + + nrt->u.dst.metrics[RTAX_MTU-1] = pmtu; + if (allfrag) + nrt->u.dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG; + + /* According to RFC 1981, detecting PMTU increase shouldn't be + * happened within 5 mins, the recommended timer is 10 mins. + * Here this route expiration time is set to ip6_rt_mtu_expires + * which is 10 mins. After 10 mins the decreased pmtu is expired + * and detecting PMTU increase will be automatically happened. + */ + dst_set_expires(&nrt->u.dst, ip6_rt_mtu_expires); + nrt->rt6i_flags |= RTF_DYNAMIC|RTF_EXPIRES; + + ip6_ins_rt(nrt, NULL, NULL, NULL); } else { nrt = ip6_rt_copy(rt); if (nrt == NULL) |