mlxsw: spectrum: Forward packets with an IPv4 link-local source IP

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[ Upstream commit f604d3aaf6 ]

By default, the device does not forward IPv4 packets with a link-local
source IP (i.e., 169.254.0.0/16). This behavior does not align with the
kernel which does forward them.

Fix by instructing the device to forward such packets instead of
dropping them.

Fixes: ca360db4b8 ("mlxsw: spectrum: Disable DIP_LINK_LOCAL check in hardware pipeline")
Reported-by: Zoey Mertes <zoey@cloudflare.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Link: https://patch.msgid.link/6721e6b2c96feb80269e72ce8d0b426e2f32d99c.1755174341.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Ido Schimmel 2025-08-14 15:06:40 +02:00 • committed by Greg Kroah-Hartman

parent 0b94a46e83

commit 3570eea2cf

2 changed files with 3 additions and 0 deletions

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2

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

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1

drivers/net/ethernet/mellanox/mlxsw/trap.h

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