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route: Add multipath_hash in flowi_common to make user-define hash

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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>
This commit is contained in:
wenxu
2019-02-24 11:36:20 +08:00
committed by David S. Miller
parent 8f4ef499c6
commit 24ba14406c
6 changed files with 13 additions and 6 deletions
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3
include/net/ip_tunnels.h
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@@ -241,7 +241,7 @@ static inline void ip_tunnel_init_flow(struct flowi4 *fl4,
int proto,
__be32 daddr, __be32 saddr,
__be32 key, __u8 tos, int oif,
__u32 mark)
__u32 mark, __u32 tun_inner_hash)
{
memset(fl4, 0, sizeof(*fl4));
fl4->flowi4_oif = oif;
@@ -251,6 +251,7 @@ static inline void ip_tunnel_init_flow(struct flowi4 *fl4,
fl4->flowi4_proto = proto;
fl4->fl4_gre_key = key;
fl4->flowi4_mark = mark;
fl4->flowi4_multipath_hash = tun_inner_hash;
}
int ip_tunnel_init(struct net_device *dev);