bpf: Refactor trampoline update code

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As we need to introduce a third type of attachment for trampolines, the
flattened signature of arch_prepare_bpf_trampoline gets even more
complicated.

Refactor the prog and count argument to arch_prepare_bpf_trampoline to
use bpf_tramp_progs to simplify the addition and accounting for new
attachment types.

Signed-off-by: KP Singh <kpsingh@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200304191853.1529-2-kpsingh@chromium.org

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KP Singh 2020-03-04 20:18:47 +01:00 • committed by Alexei Starovoitov

parent cc6fa77102

commit 88fd9e5352

4 changed files with 71 additions and 45 deletions

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31

arch/x86/net/bpf_jit_comp.c

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13

include/linux/bpf.h

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10

kernel/bpf/bpf_struct_ops.c

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62

kernel/bpf/trampoline.c

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