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From: Eric Dumazet <eric.dumazet@gmail.com>
To: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>,
	Matteo Croce <mcroce@redhat.com>,
	netdev@vger.kernel.org
Cc: Jay Vosburgh <j.vosburgh@gmail.com>,
	Veaceslav Falico <vfalico@gmail.com>,
	Andy Gospodarek <andy@greyhouse.net>,
	"David S . Miller" <davem@davemloft.net>,
	Stanislav Fomichev <sdf@google.com>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Song Liu <songliubraving@fb.com>,
	Alexei Starovoitov <ast@kernel.org>,
	Paul Blakey <paulb@mellanox.com>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next v2 4/4] bonding: balance ICMP echoes in layer3+4 mode
Date: Tue, 29 Oct 2019 14:03:08 -0700	[thread overview]
Message-ID: <576a4a96-861b-6a86-b059-6621a22d191c@gmail.com> (raw)
In-Reply-To: <5be14e4e-807f-486d-d11a-3113901e72fe@cumulusnetworks.com>



On 10/29/19 11:35 AM, Nikolay Aleksandrov wrote:

> Hi Matteo,
> Wouldn't it be more useful and simpler to use some field to choose the slave (override the hash
> completely) in a deterministic way from user-space ?
> For example the mark can be interpreted as a slave id in the bonding (should be
> optional, to avoid breaking existing setups). ping already supports -m and
> anything else can set it, this way it can be used to do monitoring for a specific
> slave with any protocol and would be a much simpler change.
> User-space can then implement any logic for the monitoring case and as a minor bonus
> can monitor the slaves in parallel. And the opposite as well - if people don't want
> these balanced for some reason, they wouldn't enable it.
> 

I kind of agree giving user more control. But I do not believe we need to use the mark
(this might be already used by other layers)

TCP uses sk->sk_hash to feed skb->hash.

Anything using skb_set_owner_w() is also using sk->sk_hash if set.

So presumably we could add a generic SO_TXHASH socket option to let user space
read/set this field.


  parent reply	other threads:[~2019-10-29 21:03 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-29 13:50 [PATCH net-next v2 0/4] ICMP flow improvements Matteo Croce
2019-10-29 13:50 ` [PATCH net-next v2 1/4] flow_dissector: add meaningful comments Matteo Croce
2019-10-29 13:50 ` [PATCH net-next v2 2/4] flow_dissector: skip the ICMP dissector for non ICMP packets Matteo Croce
2019-10-29 13:50 ` [PATCH net-next v2 3/4] flow_dissector: extract more ICMP information Matteo Croce
2019-10-29 13:50 ` [PATCH net-next v2 4/4] bonding: balance ICMP echoes in layer3+4 mode Matteo Croce
2019-10-29 18:35   ` Nikolay Aleksandrov
2019-10-29 18:41     ` Nikolay Aleksandrov
2019-10-29 19:45       ` Matteo Croce
2019-10-29 20:07         ` Nikolay Aleksandrov
2019-10-29 21:03     ` Eric Dumazet [this message]
2019-10-29 21:50       ` Nikolay Aleksandrov
2019-10-29 23:04         ` Eric Dumazet
2019-10-30 12:48           ` Nikolay Aleksandrov
2019-10-29 23:03       ` Matteo Croce
2019-10-29 23:14         ` Eric Dumazet
2019-10-29 23:19           ` Matteo Croce
2019-10-31 16:22             ` Matteo Croce
2019-10-31  0:21 ` [PATCH net-next v2 0/4] ICMP flow improvements David Miller

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