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| author | David S. Miller <davem@davemloft.net> | 2012-07-10 07:02:09 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-07-10 22:40:15 -0700 |
| commit | 710ab6c03122cf464510f8c86eb0a179e80b2d61 (patch) | |
| tree | 062da3050c7a81c0c88a622caf302fe07e109647 /net | |
| parent | 5943634fc5592037db0693b261f7f4bea6bb9457 (diff) | |
| download | linux-710ab6c03122cf464510f8c86eb0a179e80b2d61.tar.bz2 | |
ipv4: Enforce max MTU metric at route insertion time.
Rather than at every struct rtable creation.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/fib_semantics.c | 2 | ||||
| -rw-r--r-- | net/ipv4/route.c | 7 |
2 files changed, 3 insertions, 6 deletions
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c index ae301c897a19..d71bfbdc0bf4 100644 --- a/net/ipv4/fib_semantics.c +++ b/net/ipv4/fib_semantics.c @@ -794,6 +794,8 @@ struct fib_info *fib_create_info(struct fib_config *cfg) val = nla_get_u32(nla); if (type == RTAX_ADVMSS && val > 65535 - 40) val = 65535 - 40; + if (type == RTAX_MTU && val > 65535 - 15) + val = 65535 - 15; fi->fib_metrics[type - 1] = val; } } diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 677d65253e4c..1678b575165b 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1763,21 +1763,16 @@ static void rt_set_nexthop(struct rtable *rt, const struct flowi4 *fl4, const struct fib_result *res, struct fib_info *fi, u16 type, u32 itag) { - struct dst_entry *dst = &rt->dst; - if (fi) { if (FIB_RES_GW(*res) && FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK) rt->rt_gateway = FIB_RES_GW(*res); rt_init_metrics(rt, fl4, fi); #ifdef CONFIG_IP_ROUTE_CLASSID - dst->tclassid = FIB_RES_NH(*res).nh_tclassid; + rt->dst.tclassid = FIB_RES_NH(*res).nh_tclassid; #endif } - if (dst_mtu(dst) > IP_MAX_MTU) - dst_metric_set(dst, RTAX_MTU, IP_MAX_MTU); - #ifdef CONFIG_IP_ROUTE_CLASSID #ifdef CONFIG_IP_MULTIPLE_TABLES set_class_tag(rt, fib_rules_tclass(res)); |