iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

selftests/bpf: Test case for SEC("?.struct_ops")

Browse Source 
Check that "?.struct_ops" and "?.struct_ops.link" section names define
struct_ops maps with autocreate == false after open.

Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20240306104529.6453-14-eddyz87@gmail.com
This commit is contained in:
Eduard Zingerman 2024-03-06 12:45:27 +02:00 committed by Andrii Nakryiko
parent 6ebaa3fb88
commit 733e5e8754
2 changed files with 58 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
tools/testing/selftests/bpf/prog_tests/struct_ops_autocreate.c
View File

@ -34,10 +34,24 @@ cleanup:
struct_ops_autocreate__destroy(skel);
}
static int check_test_1_link(struct struct_ops_autocreate *skel, struct bpf_map *map)
{
struct bpf_link *link;
int err;
link = bpf_map__attach_struct_ops(skel->maps.testmod_1);
if (!ASSERT_OK_PTR(link, "bpf_map__attach_struct_ops"))
return -1;
/* 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");
bpf_link__destroy(link);
return err;
}
static void can_load_partial_object(void)
{
struct struct_ops_autocreate *skel;
struct bpf_link *link = NULL;
int err;
skel = struct_ops_autocreate__open();
@ -58,15 +72,39 @@ static void can_load_partial_object(void)
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");
check_test_1_link(skel, skel->maps.testmod_1);
cleanup:
struct_ops_autocreate__destroy(skel);
}
static void optional_maps(void)
{
struct struct_ops_autocreate *skel;
int err;
skel = struct_ops_autocreate__open();
if (!ASSERT_OK_PTR(skel, "struct_ops_autocreate__open"))
return;
ASSERT_TRUE(bpf_map__autocreate(skel->maps.testmod_1), "testmod_1 autocreate");
ASSERT_TRUE(bpf_map__autocreate(skel->maps.testmod_2), "testmod_2 autocreate");
ASSERT_FALSE(bpf_map__autocreate(skel->maps.optional_map), "optional_map autocreate");
ASSERT_FALSE(bpf_map__autocreate(skel->maps.optional_map2), "optional_map2 autocreate");
err = bpf_map__set_autocreate(skel->maps.testmod_1, false);
err |= bpf_map__set_autocreate(skel->maps.testmod_2, false);
err |= bpf_map__set_autocreate(skel->maps.optional_map2, true);
if (!ASSERT_OK(err, "bpf_map__set_autocreate"))
goto cleanup;
err = struct_ops_autocreate__load(skel);
if (ASSERT_OK(err, "struct_ops_autocreate__load"))
goto cleanup;
check_test_1_link(skel, skel->maps.optional_map2);
cleanup:
bpf_link__destroy(link);
struct_ops_autocreate__destroy(skel);
}
@ -116,4 +154,6 @@ void test_struct_ops_autocreate(void)
can_load_partial_object();
if (test__start_subtest("autoload_and_shadow_vars"))
autoload_and_shadow_vars();
if (test__start_subtest("optional_maps"))
optional_maps();
}

10
tools/testing/selftests/bpf/progs/struct_ops_autocreate.c
View File

@ -40,3 +40,13 @@ struct bpf_testmod_ops___v2 testmod_2 = {
.test_1 = (void *)test_1,
.does_not_exist = (void *)test_2
};
SEC("?.struct_ops")
struct bpf_testmod_ops___v1 optional_map = {
.test_1 = (void *)test_1,
};
SEC("?.struct_ops.link")
struct bpf_testmod_ops___v1 optional_map2 = {
.test_1 = (void *)test_1,
};