net/mlx5: Lag, multipath, give priority for routes with smaller network prefix

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[ Upstream commit 31057979cd ]

Today multipath offload is controlled by a single route and the route
controlling is selected if it meets one of the following criteria:
        1. No controlling route is set.
        2. New route destination is the same as old one.
        3. New route metric is lower than old route metric.

This can cause unwanted behaviour in case a new route is added
with a smaller network prefix which should get the priority.

Fix this by adding a new criteria to give priority to new route with
a smaller network prefix.

Fixes: ad11c4f1d8 ("net/mlx5e: Lag, Only handle events from highest priority multipath entry")
Signed-off-by: Patrisious Haddad <phaddad@nvidia.com>
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Link: https://patch.msgid.link/20251225132717.358820-2-mbloch@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Patrisious Haddad 2025-12-25 15:27:13 +02:00 • committed by Greg Kroah-Hartman

parent 8bdc624bf3

commit 6584963258

1 changed files with 7 additions and 2 deletions

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drivers/net/ethernet/mellanox/mlx5/core/lag/mp.c

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