bpf: offload: factor out netdev checking at allocation time

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Add a helper to check if netdev could be found and whether it
has .ndo_bpf callback.  There is no need to check the callback
every time it's invoked, ndos can't reasonably be swapped for
a set without .ndp_bpf while program is loaded.

bpf_dev_offload_check() will also be used by map offload.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

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Jakub Kicinski 2018-01-11 20:29:08 -08:00 • committed by Daniel Borkmann

parent 0a9c1991f2

commit 5bc2d55c6a

1 changed files with 20 additions and 8 deletions

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kernel/bpf/offload.c

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