This patch changes how the multipath hash is computed for locally
generated flows: now the hash comprises l4 information.
This allows better utilization of the available paths when the existing
flows have the same source IP and the same destination IP: with l3 hash,
even when multiple connections are in place simultaneously, a single path
will be used, while with l4 hash we can use all the available paths.
v2 changes:
- use get_hash_from_flowi4() instead of implementing just another l4 hash
function
Signed-off-by: Paolo Abeni <pab...@redhat.com>
---
net/ipv4/fib_semantics.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 42778d9..f30df0e 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -1564,7 +1564,8 @@ void fib_select_path(struct net *net, struct fib_result
*res,
#ifdef CONFIG_IP_ROUTE_MULTIPATH
if (res->fi->fib_nhs > 1 && fl4->flowi4_oif == 0) {
if (mp_hash < 0)
- mp_hash = fib_multipath_hash(fl4->saddr, fl4->daddr);
+ mp_hash = get_hash_from_flowi4(fl4) >> 1;
+
fib_select_multipath(res, mp_hash);
}
else
--
1.8.3.1
--
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