netdev - Re: [PATCH net] net: ipv4: Set addr_type in hash

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Message-ID: <c29f286d-0027-b549-9385-df82cf219195@cumulusnetworks.com>
Date:   Wed, 21 Feb 2018 21:15:48 +0200
From:   Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
To:     David Ahern <dsahern@...il.com>, netdev@...r.kernel.org
Cc:     idosch@...sch.org, davem@...emloft.net
Subject: Re: [PATCH net] net: ipv4: Set addr_type in hash_keys for forwarded
 case

On 21/02/18 21:00, David Ahern wrote:
> The result of the skb flow dissect is copied from keys to hash_keys to
> ensure only the intended data is hashed. The original L4 hash patch
> overlooked setting the addr_type for this case; add it.
> 
> Fixes: bf4e0a3db97eb ("net: ipv4: add support for ECMP hash policy choice")
> Reported-by: Ido Schimmel <idosch@...sch.org>
> Signed-off-by: David Ahern <dsahern@...il.com>
> ---
>  net/ipv4/route.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/net/ipv4/route.c b/net/ipv4/route.c
> index 49cc1c1df1ba..a4f44d815a61 100644
> --- a/net/ipv4/route.c
> +++ b/net/ipv4/route.c
> @@ -1826,6 +1826,8 @@ int fib_multipath_hash(const struct fib_info *fi, const struct flowi4 *fl4,
>  				return skb_get_hash_raw(skb) >> 1;
>  			memset(&hash_keys, 0, sizeof(hash_keys));
>  			skb_flow_dissect_flow_keys(skb, &keys, flag);
> +
> +			hash_keys.control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
>  			hash_keys.addrs.v4addrs.src = keys.addrs.v4addrs.src;
>  			hash_keys.addrs.v4addrs.dst = keys.addrs.v4addrs.dst;
>  			hash_keys.ports.src = keys.ports.src;
> 

Good catch,

Acked-by: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>