nfp: bpf: add basic support for adjust head call

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Support bpf_xdp_adjust_head().  We need to check whether the
packet offset after adjustment is within datapath's limits.
We also check if the frame is at least ETH_HLEN long (similar
to the kernel implementation).

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

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This commit is contained in:

Jakub Kicinski 2017-12-14 21:29:18 -08:00 • committed by Daniel Borkmann

parent 2cb230bded

commit 0d49eaf4db

6 changed files with 190 additions and 0 deletions

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54

drivers/net/ethernet/netronome/nfp/bpf/fw.h

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73

drivers/net/ethernet/netronome/nfp/bpf/jit.c

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38

drivers/net/ethernet/netronome/nfp/bpf/main.c

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11

drivers/net/ethernet/netronome/nfp/bpf/main.h

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12

drivers/net/ethernet/netronome/nfp/bpf/verifier.c

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2

drivers/net/ethernet/netronome/nfp/nfp_asm.h

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