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MAX_EXT_FUNCS seems to be too small #425

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Officeyutong opened this issue Apr 11, 2024 · 0 comments

Officeyutong commented Apr 11, 2024

Currently MAX_EXT_FUNCS is hardcoded in code and has a value of 64, see

ubpf/vm/ubpf_vm.c

Line 33 in 39872ad

#define MAX_EXT_FUNCS 64

This seems to be too small, since kernel has more than 200 helpers (see https://github.com/libbpf/libbpf/blob/master/src/bpf_helper_defs.h)

What about determining the maximum number of external helpers at runtime, and let user provide this number when calling ubpf_create?

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