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authorDavid S. Miller <davem@davemloft.net>2012-07-17 12:20:47 -0700
committerDavid S. Miller <davem@davemloft.net>2012-07-20 13:36:16 -0700
commitf2bb4bedf35d5167a073dcdddf16543f351ef3ae (patch)
treed68e90f5541302bfda64f044c5713e4f22aca599 /include/net
parentceb3320610d6f15ff20dd4c042b36473d77de76f (diff)
downloadop-kernel-dev-f2bb4bedf35d5167a073dcdddf16543f351ef3ae.zip
op-kernel-dev-f2bb4bedf35d5167a073dcdddf16543f351ef3ae.tar.gz
ipv4: Cache output routes in fib_info nexthops.
If we have an output route that lacks nexthop exceptions, we can cache it in the FIB info nexthop. Such routes will have DST_HOST cleared because such routes refer to a family of destinations, rather than just one. The sequence of the handling of exceptions during route lookup is adjusted to make the logic work properly. Before we allocate the route, we lookup the exception. Then we know if we will cache this route or not, and therefore whether DST_HOST should be set on the allocated route. Then we use DST_HOST to key off whether we should store the resulting route, during rt_set_nexthop(), in the FIB nexthop cache. With help from Eric Dumazet. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/ip_fib.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index 2daf096..fb62c59 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -46,6 +46,7 @@ struct fib_config {
};
struct fib_info;
+struct rtable;
struct fib_nh_exception {
struct fib_nh_exception __rcu *fnhe_next;
@@ -80,6 +81,7 @@ struct fib_nh {
__be32 nh_gw;
__be32 nh_saddr;
int nh_saddr_genid;
+ struct rtable *nh_rth_output;
struct fnhe_hash_bucket *nh_exceptions;
};
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