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| author |   David S. Miller <davem@davemloft.net> | 2010-12-12 21:55:08 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-12-12 22:08:17 -0800 |
| commit | 323e126f0c5995f779d7df7fd035f6e8fed8764d (patch) | |
| tree | 402c7267a45ae488363bb1ef8e4c786b65b82572 /include/net/route.h | |
| parent | ipv6: Demark default hoplimit as zero. (diff) | |
| download | linux-dev-323e126f0c5995f779d7df7fd035f6e8fed8764d.tar.xz linux-dev-323e126f0c5995f779d7df7fd035f6e8fed8764d.zip | |
ipv4: Don't pre-seed hoplimit metric.
Always go through a new ip4_dst_hoplimit() helper, just like ipv6.
This allowed several simplifications:
1) The interim dst_metric_hoplimit() can go as it's no longer
userd.
2) The sysctl_ip_default_ttl entry no longer needs to use
ipv4_doint_and_flush, since the sysctl is not cached in
routing cache metrics any longer.
3) ipv4_doint_and_flush no longer needs to be exported and
therefore can be marked static.
When ipv4_doint_and_flush_strategy was removed some time ago,
the external declaration in ip.h was mistakenly left around
so kill that off too.
We have to move the sysctl_ip_default_ttl declaration into
ipv4's route cache definition header net/route.h, because
currently net/ip.h (where the declaration lives now) has
a back dependency on net/route.h
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/route.h')
| -rw-r--r-- | include/net/route.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/net/route.h b/include/net/route.h index b8c1f7703fc6..27002362944a 100644 --- a/include/net/route.h +++ b/include/net/route.h @@ -231,4 +231,15 @@ static inline int inet_iif(const struct sk_buff *skb) return skb_rtable(skb)->rt_iif; } +extern int sysctl_ip_default_ttl; + +static inline int ip4_dst_hoplimit(const struct dst_entry *dst) +{ + int hoplimit = dst_metric_raw(dst, RTAX_HOPLIMIT); + + if (hoplimit == 0) + hoplimit = sysctl_ip_default_ttl; + return hoplimit; +} + #endif /* _ROUTE_H */ |