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ipv4: Cache input routes in fib_info nexthops.

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Caching input routes is slightly simpler than output routes, since we
don't need to be concerned with nexthop exceptions.  (locally
destined, and routed packets, never trigger PMTU events or redirects
that will be processed by us).

However, we have to elide caching for the DIRECTSRC and non-zero itag
cases.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2012-07-17 12:58:50 -07:00
parent f2bb4bedf3
commit d2d68ba9fe
3 changed files with 46 additions and 12 deletions
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2
net/ipv4/fib_semantics.c
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@@ -173,6 +173,8 @@ static void free_fib_info_rcu(struct rcu_head *head)
free_nh_exceptions(nexthop_nh);
if (nexthop_nh->nh_rth_output)
dst_release(&nexthop_nh->nh_rth_output->dst);
if (nexthop_nh->nh_rth_input)
dst_release(&nexthop_nh->nh_rth_input->dst);
} endfor_nexthops(fi);
release_net(fi->fib_net);