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authorPaolo Abeni <pabeni@redhat.com>2015-10-29 22:20:40 +0100
committerDavid S. Miller <davem@davemloft.net>2015-11-02 20:38:43 +0100
commit9920e48b830a0f4ec06bcbf0ec3147c88ae72bac (patch)
treeffc26343183c1249bc2456622bf733e6ca66bbcf /net
parentUse 64-bit timekeeping (diff)
downloadlinux-9920e48b830a0f4ec06bcbf0ec3147c88ae72bac.tar.xz
linux-9920e48b830a0f4ec06bcbf0ec3147c88ae72bac.zip
ipv4: use l4 hash for locally generated multipath flows
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 <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/fib_semantics.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 42778d9d71e5..f30df0ee4f4d 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