net: pass dst via net_device_path in dev_fill_forward_path()

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Add dst_entry to tunnel device path, this will allow us to remove
a duplicated route lookup.

This is a preparation patch to retrieve the tunnel route directly
from the .fill_forward_path. This new dst_entry in the tunnel will be
used by a follow up patch.

Since dst_release() works fine on NULL interface, this is still
noop until the flowtable starts using this.

Add a new dev_fill_forward_path_release() function to drop the refcount
on the tunnel device route and use it in case of error out. Export it so
to drop the refcount on the tunnel route at a later stage.

Adjust existing drivers that recycle dev_fill_forward_path() to call
dev_fill_forward_path_release() for safety reasons.

Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

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This commit is contained in:

Pablo Neira Ayuso 2026-07-28 18:30:48 +02:00

parent 5deda60c56

commit 0ad8404e77

4 changed files with 47 additions and 11 deletions

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10

drivers/net/ethernet/airoha/airoha_ppe.c

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10

drivers/net/ethernet/mediatek/mtk_ppe_offload.c

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2

include/linux/netdevice.h

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36

net/core/dev.c

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