From: Ido Schimmel <idosch@nvidia.com>
To: Yuyang Huang <sigefriedhyy@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>,
Bobby Eshleman <bobbyeshleman@meta.com>,
Chris J Arges <carges@cloudflare.com>,
Daniel Zahka <daniel.zahka@gmail.com>,
David Ahern <dsahern@kernel.org>, David Wei <dw@davidwei.uk>,
Dimitri Daskalakis <dimitri.daskalakis1@gmail.com>,
Donald Hunter <donald.hunter@gmail.com>,
Eric Dumazet <edumazet@google.com>, Gal Pressman <gal@nvidia.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Shuah Khan <shuah@kernel.org>, Simon Horman <horms@kernel.org>,
Stanislav Fomichev <sdf@fomichev.me>,
Willem de Bruijn <willemb@google.com>,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
netdev@vger.kernel.org
Subject: Re: [PATCH net-next 0/2] ipv6: report why a route was deleted in RTM_DELROUTE
Date: Sun, 19 Jul 2026 09:53:10 +0300 [thread overview]
Message-ID: <20260719065310.GB1841238@shredder> (raw)
In-Reply-To: <20260717222327.7398-1-sigefriedhyy@gmail.com>
On Sat, Jul 18, 2026 at 07:23:25AM +0900, Yuyang Huang wrote:
> When the kernel deletes an IPv6 route on its own, the RTM_DELROUTE
> notification does not say why. User space cannot tell a route that
> expired from one the router explicitly withdrew, yet the two call for
> different reactions: an expired RA route means the router failed to
> refresh it in time, which points at a misconfigured or unreliable
> router and may warrant action such as disabling IPv6 on that network,
> while a zero-lifetime withdrawal is normal, RFC-compliant operation.
Please expand more on the motivation: Which user space application is
going to consume this information and what is it going to do with it?
Also, Sashiko has some valid comments. Please take a look.
next prev parent reply other threads:[~2026-07-19 6:53 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-17 22:23 [PATCH net-next 0/2] ipv6: report why a route was deleted in RTM_DELROUTE Yuyang Huang
2026-07-17 22:23 ` [PATCH net-next 1/2] " Yuyang Huang
2026-07-17 22:23 ` [PATCH net-next 2/2] selftests: net: verify RTA_DEL_REASON on route deletion Yuyang Huang
2026-07-19 6:53 ` Ido Schimmel [this message]
2026-07-19 11:24 ` [PATCH net-next 0/2] ipv6: report why a route was deleted in RTM_DELROUTE Yuyang Huang
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