From: Tianyi Gao <tianyi@cloudflare.com>
To: netdev@vger.kernel.org
Cc: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@kernel.org,
kuba@kernel.org, pabeni@redhat.com, toke@redhat.com,
lorenzo@kernel.org, horms@kernel.org, bpf@vger.kernel.org,
shuah@kernel.org, hawk@kernel.org, kernel-team@cloudflare.com,
ast@kernel.org, daniel@iogearbox.net, john.fastabend@gmail.com,
sdf@fomichev.me, linux-kselftest@vger.kernel.org,
Tianyi Gao <tianyi@cloudflare.com>
Subject: [PATCH net 0/2] veth: fix peer NETDEV_XDP_ACT_NDO_XMIT after GRO is toggled while down
Date: Tue, 6 Oct 2026 18:32:35 +0100 [thread overview]
Message-ID: <20261006173241.65945-1-tianyi@cloudflare.com> (raw)
Toggling GRO on a veth device while it is down leaves its peer's
NETDEV_XDP_ACT_NDO_XMIT flag stale once the device comes up. XDP
redirects into the peer are then rejected with -EOPNOTSUPP, or, if GRO
was turned off, accepted and then dropped with -ENXIO. Patch 1 refreshes
the peer's flags in veth_open().
Patch 2 extends veth.sh to check the peer's flag after GRO is toggled
while the device is down, in both directions.
Tianyi Gao (2):
veth: fix peer NETDEV_XDP_ACT_NDO_XMIT after GRO is toggled while down
selftests: net: veth: test peer ndo-xmit after GRO toggle while down
drivers/net/veth.c | 1 +
tools/testing/selftests/net/veth.sh | 46 +++++++++++++++++++++++++++++
2 files changed, 47 insertions(+)
base-commit: d5a007b9b457c915ab1a53227e8939e4018aa97a
--
2.55.0
next reply other threads:[~2026-10-06 17:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-06 17:32 Tianyi Gao [this message]
2026-10-06 17:32 ` [PATCH net 1/2] veth: fix peer NETDEV_XDP_ACT_NDO_XMIT after GRO is toggled while down Tianyi Gao
2026-10-07 10:20 ` Toke Høiland-Jørgensen
2026-10-07 10:24 ` Jesper Dangaard Brouer
2026-10-07 12:45 ` Lorenzo Bianconi
2026-10-06 17:32 ` [PATCH net 2/2] selftests: net: veth: test peer ndo-xmit after GRO toggle " Tianyi Gao
2026-10-06 17:39 ` [PATCH net 0/2] veth: fix peer NETDEV_XDP_ACT_NDO_XMIT after GRO is toggled " netdev-bot+sinfo
2026-10-06 17:48 ` Tianyi Gao
2026-10-08 17:50 ` patchwork-bot+netdevbpf
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20261006173241.65945-1-tianyi@cloudflare.com \
--to=tianyi@cloudflare.com \
--cc=andrew+netdev@lunn.ch \
--cc=ast@kernel.org \
--cc=bpf@vger.kernel.org \
--cc=daniel@iogearbox.net \
--cc=davem@davemloft.net \
--cc=edumazet@kernel.org \
--cc=hawk@kernel.org \
--cc=horms@kernel.org \
--cc=john.fastabend@gmail.com \
--cc=kernel-team@cloudflare.com \
--cc=kuba@kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=lorenzo@kernel.org \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=sdf@fomichev.me \
--cc=shuah@kernel.org \
--cc=toke@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox