bpf: move recursion detection logic to helpers

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BPF programs detect recursion by doing atomic inc/dec on a per-cpu
active counter from the trampoline. Create two helpers for operations on
this active counter, this makes it easy to changes the recursion
detection logic in future.

This commit makes no functional changes.

Acked-by: Yonghong Song <yonghong.song@linux.dev>
Signed-off-by: Puranjay Mohan <puranjay@kernel.org>
Link: https://lore.kernel.org/r/20251219184422.2899902-2-puranjay@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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This commit is contained in:

Puranjay Mohan 2025-12-19 10:44:17 -08:00 • committed by Alexei Starovoitov

parent 3d60306b7b

commit 93f0d09697

3 changed files with 16 additions and 6 deletions

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10

include/linux/bpf.h

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8

kernel/bpf/trampoline.c

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4

kernel/trace/bpf_trace.c

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