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https://gitee.com/bianbu-linux/linux-6.6
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8c5d71d963
This change adds a test for libbpf_bpf_prog_type_str. The test retrieves all variants of the bpf_prog_type enumeration using BTF and makes sure that the function under test works as expected for them. Signed-off-by: Daniel Müller <deso@posteo.net> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Quentin Monnet <quentin@isovalent.com> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220523230428.3077108-3-deso@posteo.net
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
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#include <ctype.h>
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#include <test_progs.h>
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#include <bpf/btf.h>
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/*
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* Utility function uppercasing an entire string.
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*/
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static void uppercase(char *s)
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{
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for (; *s != '\0'; s++)
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*s = toupper(*s);
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}
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/*
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* Test case to check that all bpf_prog_type variants are covered by
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* libbpf_bpf_prog_type_str.
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*/
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void test_libbpf_bpf_prog_type_str(void)
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{
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struct btf *btf;
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const struct btf_type *t;
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const struct btf_enum *e;
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int i, n, id;
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btf = btf__parse("/sys/kernel/btf/vmlinux", NULL);
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if (!ASSERT_OK_PTR(btf, "btf_parse"))
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return;
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/* find enum bpf_prog_type and enumerate each value */
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id = btf__find_by_name_kind(btf, "bpf_prog_type", BTF_KIND_ENUM);
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if (!ASSERT_GT(id, 0, "bpf_prog_type_id"))
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goto cleanup;
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t = btf__type_by_id(btf, id);
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e = btf_enum(t);
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n = btf_vlen(t);
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for (i = 0; i < n; e++, i++) {
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enum bpf_prog_type prog_type = (enum bpf_prog_type)e->val;
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const char *prog_type_name;
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const char *prog_type_str;
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char buf[256];
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prog_type_name = btf__str_by_offset(btf, e->name_off);
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prog_type_str = libbpf_bpf_prog_type_str(prog_type);
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ASSERT_OK_PTR(prog_type_str, prog_type_name);
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snprintf(buf, sizeof(buf), "BPF_PROG_TYPE_%s", prog_type_str);
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uppercase(buf);
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ASSERT_STREQ(buf, prog_type_name, "exp_str_value");
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}
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cleanup:
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btf__free(btf);
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}
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