tools/testing/selftests/bpf/prog_tests/bad_struct_ops.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/prog_tests/bad_struct_ops.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/prog_tests/bad_struct_ops.c
Extension
.c
Size
1563 bytes
Lines
68
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0

#include <test_progs.h>
#include "bad_struct_ops.skel.h"
#include "bad_struct_ops2.skel.h"

static void invalid_prog_reuse(void)
{
	struct bad_struct_ops *skel;
	char *log = NULL;
	int err;

	skel = bad_struct_ops__open();
	if (!ASSERT_OK_PTR(skel, "bad_struct_ops__open"))
		return;

	if (start_libbpf_log_capture())
		goto cleanup;

	err = bad_struct_ops__load(skel);
	log = stop_libbpf_log_capture();
	ASSERT_ERR(err, "bad_struct_ops__load should fail");
	ASSERT_HAS_SUBSTR(log,
		"struct_ops init_kern testmod_2 func ptr test_1: invalid reuse of prog test_1",
		"expected init_kern message");

cleanup:
	free(log);
	bad_struct_ops__destroy(skel);
}

static void unused_program(void)
{
	struct bad_struct_ops2 *skel;
	char *log = NULL;
	int err;

	skel = bad_struct_ops2__open();
	if (!ASSERT_OK_PTR(skel, "bad_struct_ops2__open"))
		return;

	/* struct_ops programs not referenced from any maps are open
	 * with autoload set to true.
	 */
	ASSERT_TRUE(bpf_program__autoload(skel->progs.foo), "foo autoload == true");

	if (start_libbpf_log_capture())
		goto cleanup;

	err = bad_struct_ops2__load(skel);
	ASSERT_ERR(err, "bad_struct_ops2__load should fail");
	log = stop_libbpf_log_capture();
	ASSERT_HAS_SUBSTR(log, "prog 'foo': failed to load",
			  "message about 'foo' failing to load");

cleanup:
	free(log);
	bad_struct_ops2__destroy(skel);
}

void test_bad_struct_ops(void)
{
	if (test__start_subtest("invalid_prog_reuse"))
		invalid_prog_reuse();
	if (test__start_subtest("unused_program"))
		unused_program();
}

Annotation

Implementation Notes