diff options
| author |   wenxu <wenxu@ucloud.cn> | 2019-02-24 11:36:20 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-02-27 12:50:17 -0800 |
| commit | 24ba14406c5c8e33fcbe064f77b3ab01b84ec830 (patch) | |
| tree | 88eee234f6c4e037ad2467b8c370ed1541f5e366 /net/ipv4/route.c | |
| parent | Merge branch 'net-Remove-switchdev_ops' (diff) | |
| download | linux-dev-24ba14406c5c8e33fcbe064f77b3ab01b84ec830.tar.xz linux-dev-24ba14406c5c8e33fcbe064f77b3ab01b84ec830.zip | |
route: Add multipath_hash in flowi_common to make user-define hash
Current fib_multipath_hash_policy can make hash based on the L3 or
L4. But it only work on the outer IP. So a specific tunnel always
has the same hash value. But a specific tunnel may contain so many
inner connections.
This patch provide a generic multipath_hash in floi_common. It can
make a user-define hash which can mix with L3 or L4 hash.
Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | net/ipv4/route.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index ecc12a768191..7cf4c8305071 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1820,6 +1820,7 @@ out: int fib_multipath_hash(const struct net *net, const struct flowi4 *fl4, const struct sk_buff *skb, struct flow_keys *flkeys) { + u32 multipath_hash = fl4->flowi4_multipath_hash; struct flow_keys hash_keys; u32 mhash; @@ -1870,6 +1871,9 @@ int fib_multipath_hash(const struct net *net, const struct flowi4 *fl4, } mhash = flow_hash_from_keys(&hash_keys); + if (multipath_hash) + mhash = jhash_2words(mhash, multipath_hash, 0); + return mhash >> 1; } #endif /* CONFIG_IP_ROUTE_MULTIPATH */ |