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| author | David S. Miller <davem@davemloft.net> | 2010-12-15 00:01:14 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-12-15 00:01:14 +0300 |
| commit | d33e455337ea2c71d09d7f4367d6ad6dd32b6965 (patch) | |
| tree | d1b35b1be5ab73df6f7e57b86a2e68fad2990adf /net/decnet | |
| parent | 9fe146aef44afe5ec677d8150b6ae94e09b773f7 (diff) | |
| download | linux-d33e455337ea2c71d09d7f4367d6ad6dd32b6965.tar.xz | |
net: Abstract default MTU metric calculation behind an accessor.
Like RTAX_ADVMSS, make the default calculation go through a dst_ops
method rather than caching the computation in the routing cache
entries.
Now dst metrics are pretty much left as-is when new entries are
created, thus optimizing metric sharing becomes a real possibility.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/decnet')
| -rw-r--r-- | net/decnet/dn_route.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c index b8a5c0515be8..5e636365d33c 100644 --- a/net/decnet/dn_route.c +++ b/net/decnet/dn_route.c @@ -111,6 +111,7 @@ static unsigned long dn_rt_deadline; static int dn_dst_gc(struct dst_ops *ops); static struct dst_entry *dn_dst_check(struct dst_entry *, __u32); static unsigned int dn_dst_default_advmss(const struct dst_entry *dst); +static unsigned int dn_dst_default_mtu(const struct dst_entry *dst); static struct dst_entry *dn_dst_negative_advice(struct dst_entry *); static void dn_dst_link_failure(struct sk_buff *); static void dn_dst_update_pmtu(struct dst_entry *dst, u32 mtu); @@ -131,6 +132,7 @@ static struct dst_ops dn_dst_ops = { .gc = dn_dst_gc, .check = dn_dst_check, .default_advmss = dn_dst_default_advmss, + .default_mtu = dn_dst_default_mtu, .negative_advice = dn_dst_negative_advice, .link_failure = dn_dst_link_failure, .update_pmtu = dn_dst_update_pmtu, @@ -803,6 +805,11 @@ static unsigned int dn_dst_default_advmss(const struct dst_entry *dst) return dn_mss_from_pmtu(dst->dev, dst_mtu(dst)); } +static unsigned int dn_dst_default_mtu(const struct dst_entry *dst) +{ + return dst->dev->mtu; +} + static int dn_rt_set_next_hop(struct dn_route *rt, struct dn_fib_res *res) { struct dn_fib_info *fi = res->fi; @@ -825,8 +832,7 @@ static int dn_rt_set_next_hop(struct dn_route *rt, struct dn_fib_res *res) rt->dst.neighbour = n; } - if (dst_metric(&rt->dst, RTAX_MTU) == 0 || - dst_metric(&rt->dst, RTAX_MTU) > rt->dst.dev->mtu) + if (dst_metric(&rt->dst, RTAX_MTU) > rt->dst.dev->mtu) dst_metric_set(&rt->dst, RTAX_MTU, rt->dst.dev->mtu); metric = dst_metric_raw(&rt->dst, RTAX_ADVMSS); if (metric) { |