在 2025/2/22 02:19, Eduard Zingerman 写道:
On Sat, 2025-02-22 at 00:33 +0800, Tao Chen wrote: [...]+static const struct { + const char *name; + int code; +} program_types[] = { +#define _T(n) { #n, BPF_PROG_TYPE_##n } + _T(KPROBE), + _T(XDP), + _T(SYSCALL), + _T(SCHED_CLS), + _T(SCHED_ACT), + _T(SK_SKB), + _T(SOCKET_FILTER), + _T(CGROUP_SKB), + _T(LWT_OUT), + _T(LWT_IN), + _T(LWT_XMIT), + _T(LWT_SEG6LOCAL), + _T(NETFILTER), + _T(CGROUP_SOCK_ADDR), + _T(SCHED_ACT) +#undef _T +}; + +void test_libbpf_probe_kfuncs_many(void) +{Hi Tao, Sorry, probably some miscommunication from my side. I did not mean this test for inclusion, it was meant as a one time manual inspection of libbpf_probe_bpf_kfunc results. Just as a sanity check before series is merged. As an automated test it does not provide much meaningful signal.
Ok, i will resend v8 without this case, and check all the prog types later with your program. Thanks.
+ int i, kfunc_id, ret, id; + const struct btf_type *t; + struct btf *btf = NULL; + const char *kfunc; + const char *tag; + + btf = btf__parse("/sys/kernel/btf/vmlinux", NULL); + if (!ASSERT_OK_PTR(btf, "btf_parse")) + return; + for (id = 0; id < btf__type_cnt(btf); ++id) { + t = btf__type_by_id(btf, id); + if (!t) + continue; + if (!btf_is_decl_tag(t)) + continue; + tag = btf__name_by_offset(btf, t->name_off); + if (strcmp(tag, "bpf_kfunc") != 0) + continue; + kfunc_id = t->type; + t = btf__type_by_id(btf, kfunc_id); + if (!btf_is_func(t)) + continue; + kfunc = btf__name_by_offset(btf, t->name_off); + for (i = 0; i < ARRAY_SIZE(program_types); ++i) { + ret = libbpf_probe_bpf_kfunc(program_types[i].code, + kfunc_id, -1, NULL); + if (ret < 0) { + ASSERT_FAIL("kfunc:%s use prog type:%d", + kfunc, program_types[i].code); + goto cleanup; + } + } + } +cleanup: + btf__free(btf); +}
-- Best Regards Tao Chen
