bpf: add helper inlining infra and optimize map_array lookup

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Optimize bpf_call -> bpf_map_lookup_elem() -> array_map_lookup_elem()
into a sequence of bpf instructions.
When JIT is on the sequence of bpf instructions is the sequence
of native cpu instructions with significantly faster performance
than indirect call and two function's prologue/epilogue.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Alexei Starovoitov 2017-03-15 18:26:42 -07:00 • committed by David S. Miller

parent 8041902dae

commit 81ed18ab30

5 changed files with 77 additions and 4 deletions

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1

include/linux/bpf.h

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5

include/linux/bpf_verifier.h

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10

include/linux/filter.h

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29

kernel/bpf/arraymap.c

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36

kernel/bpf/verifier.c

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