netdev - Re: [PATCH net v2] ipv6: socket SO_BINDTODEVICE lookup routing fail without IPv6 rule.

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Message-ID: <8645aa77-eb46-4d87-94ce-97cd812fd69e@kernel.org>
Date: Fri, 3 Jan 2025 08:31:09 -0700
From: David Ahern <dsahern@...nel.org>
To: Shiming Cheng (成诗明)
 <Shiming.Cheng@...iatek.com>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 "linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>,
 "horms@...nel.org" <horms@...nel.org>, "kuba@...nel.org" <kuba@...nel.org>,
 "edumazet@...gle.com" <edumazet@...gle.com>,
 "pabeni@...hat.com" <pabeni@...hat.com>,
 "willemdebruijn.kernel@...il.com" <willemdebruijn.kernel@...il.com>,
 "linux-arm-kernel@...ts.infradead.org"
 <linux-arm-kernel@...ts.infradead.org>,
 "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
 "davem@...emloft.net" <davem@...emloft.net>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
 Lena Wang (王娜) <Lena.Wang@...iatek.com>
Subject: Re: [PATCH net v2] ipv6: socket SO_BINDTODEVICE lookup routing fail
 without IPv6 rule.

On 1/3/25 3:27 AM, Shiming Cheng (成诗明) wrote:
> Test cases will be provided later, below are the corresponding IP rule
> configurations for IPv4 and IPv6 that i provided, as well as the
> differences in ping results, the IPv4 result passed, but the IPv6 result
> failed, after adding this patch, the IPv6 result passed.

I do not want the output of a complicated stack of ip rules with a ping
a command.

Provide a simplistic set of commands that configure the stack and show
what you believe is a problem. Anyone on this list should be able to
quickly reproduce the setup to verify it is a problem and investigate
what is happening.