Merge branch 'veth-fix-peer-netdev_xdp_act_ndo_xmit-after-gro-is-toggled-while-down'

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Tianyi Gao says:

====================
veth: fix peer NETDEV_XDP_ACT_NDO_XMIT after GRO is toggled while down

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.
====================

Link: https://patch.msgid.link/20261006173241.65945-1-tianyi@cloudflare.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Jakub Kicinski 2026-10-08 10:43:15 -07:00

parent 259c4a5191 c017800af5

commit 726be6a0e8

2 changed files with 47 additions and 0 deletions

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1

drivers/net/veth.c

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46

tools/testing/selftests/net/veth.sh

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