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// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include "struct_ops_autocreate.skel.h"
#include "struct_ops_autocreate2.skel.h"
static void cant_load_full_object(void)
{
struct struct_ops_autocreate *skel;
char *log = NULL;
int err;
skel = struct_ops_autocreate__open();
if (!ASSERT_OK_PTR(skel, "struct_ops_autocreate__open"))
return;
if (start_libbpf_log_capture())
goto cleanup;
/* The testmod_2 map BTF type (struct bpf_testmod_ops___v2) doesn't
* match the BTF of the actual struct bpf_testmod_ops defined in the
* kernel, so we should fail to load it if we don't disable autocreate
* for that map.
*/
err = struct_ops_autocreate__load(skel);
log = stop_libbpf_log_capture();
if (!ASSERT_ERR(err, "struct_ops_autocreate__load"))
goto cleanup;
ASSERT_HAS_SUBSTR(log, "libbpf: struct_ops init_kern", "init_kern message");
ASSERT_EQ(err, -ENOTSUP, "errno should be ENOTSUP");
cleanup:
free(log);
struct_ops_autocreate__destroy(skel);
}
static void can_load_partial_object(void)
{
struct struct_ops_autocreate *skel;
struct bpf_link *link = NULL;
int err;
skel = struct_ops_autocreate__open();
if (!ASSERT_OK_PTR(skel, "struct_ops_autocreate__open_opts"))
return;
err = bpf_map__set_autocreate(skel->maps.testmod_2, false);
if (!ASSERT_OK(err, "bpf_map__set_autocreate"))
goto cleanup;
ASSERT_TRUE(bpf_program__autoload(skel->progs.test_1), "test_1 default autoload");
ASSERT_TRUE(bpf_program__autoload(skel->progs.test_2), "test_2 default autoload");
err = struct_ops_autocreate__load(skel);
if (ASSERT_OK(err, "struct_ops_autocreate__load"))
goto cleanup;
ASSERT_TRUE(bpf_program__autoload(skel->progs.test_1), "test_1 actual autoload");
ASSERT_FALSE(bpf_program__autoload(skel->progs.test_2), "test_2 actual autoload");
link = bpf_map__attach_struct_ops(skel->maps.testmod_1);
if (!ASSERT_OK_PTR(link, "bpf_map__attach_struct_ops"))
goto cleanup;
/* test_1() would be called from bpf_dummy_reg2() in bpf_testmod.c */
ASSERT_EQ(skel->bss->test_1_result, 42, "test_1_result");
cleanup:
bpf_link__destroy(link);
struct_ops_autocreate__destroy(skel);
}
/* Swap test_mod1->test_1 program from 'bar' to 'foo' using shadow vars.
* test_mod1 load should enable autoload for 'foo'.
*/
static void autoload_and_shadow_vars(void)
{
struct struct_ops_autocreate2 *skel = NULL;
struct bpf_link *link = NULL;
int err;
skel = struct_ops_autocreate2__open();
if (!ASSERT_OK_PTR(skel, "struct_ops_autocreate__open_opts"))
return;
ASSERT_FALSE(bpf_program__autoload(skel->progs.foo), "foo default autoload");
ASSERT_FALSE(bpf_program__autoload(skel->progs.bar), "bar default autoload");
/* loading map testmod_1 would switch foo's autoload to true */
skel->struct_ops.testmod_1->test_1 = skel->progs.foo;
err = struct_ops_autocreate2__load(skel);
if (ASSERT_OK(err, "struct_ops_autocreate__load"))
goto cleanup;
ASSERT_TRUE(bpf_program__autoload(skel->progs.foo), "foo actual autoload");
ASSERT_FALSE(bpf_program__autoload(skel->progs.bar), "bar actual autoload");
link = bpf_map__attach_struct_ops(skel->maps.testmod_1);
if (!ASSERT_OK_PTR(link, "bpf_map__attach_struct_ops"))
goto cleanup;
/* test_1() would be called from bpf_dummy_reg2() in bpf_testmod.c */
err = ASSERT_EQ(skel->bss->test_1_result, 42, "test_1_result");
cleanup:
bpf_link__destroy(link);
struct_ops_autocreate2__destroy(skel);
}
void test_struct_ops_autocreate(void)
{
if (test__start_subtest("cant_load_full_object"))
cant_load_full_object();
if (test__start_subtest("can_load_partial_object"))
can_load_partial_object();
if (test__start_subtest("autoload_and_shadow_vars"))
autoload_and_shadow_vars();
}
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