Commit 5b998545 authored by Tariq Toukan's avatar Tariq Toukan Committed by Jakub Kicinski

net/bonding: Take IP hash logic into a helper

Hash logic on L3 will be used in a downstream patch for one more use
case.
Take it to a function for a better code reuse.
Signed-off-by: default avatarTariq Toukan <tariqt@nvidia.com>
Reviewed-by: default avatarBoris Pismenny <borisp@nvidia.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 719a402c
......@@ -3541,6 +3541,16 @@ static bool bond_flow_dissect(struct bonding *bond, struct sk_buff *skb,
return true;
}
static u32 bond_ip_hash(u32 hash, struct flow_keys *flow)
{
hash ^= (__force u32)flow_get_u32_dst(flow) ^
(__force u32)flow_get_u32_src(flow);
hash ^= (hash >> 16);
hash ^= (hash >> 8);
/* discard lowest hash bit to deal with the common even ports pattern */
return hash >> 1;
}
/**
* bond_xmit_hash - generate a hash value based on the xmit policy
* @bond: bonding device
......@@ -3571,12 +3581,8 @@ u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb)
else
memcpy(&hash, &flow.ports.ports, sizeof(hash));
}
hash ^= (__force u32)flow_get_u32_dst(&flow) ^
(__force u32)flow_get_u32_src(&flow);
hash ^= (hash >> 16);
hash ^= (hash >> 8);
return hash >> 1;
return bond_ip_hash(hash, &flow);
}
/*-------------------------- Device entry points ----------------------------*/
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment