From 733e5e875444fc5afc9b72714f0ecaca629ccf8a Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Wed, 6 Mar 2024 12:45:27 +0200 Subject: selftests/bpf: Test case for SEC("?.struct_ops") Check that "?.struct_ops" and "?.struct_ops.link" section names define struct_ops maps with autocreate == false after open. Signed-off-by: Eduard Zingerman Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20240306104529.6453-14-eddyz87@gmail.com --- .../bpf/prog_tests/struct_ops_autocreate.c | 52 +++++++++++++++++++--- .../selftests/bpf/progs/struct_ops_autocreate.c | 10 +++++ 2 files changed, 56 insertions(+), 6 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/struct_ops_autocreate.c b/tools/testing/selftests/bpf/prog_tests/struct_ops_autocreate.c index 78948dc6445c..a5cc593c1e1d 100644 --- a/tools/testing/selftests/bpf/prog_tests/struct_ops_autocreate.c +++ b/tools/testing/selftests/bpf/prog_tests/struct_ops_autocreate.c @@ -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")) + 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; - /* test_1() would be called from bpf_dummy_reg2() in bpf_testmod.c */ - ASSERT_EQ(skel->bss->test_1_result, 42, "test_1_result"); + 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(); } diff --git a/tools/testing/selftests/bpf/progs/struct_ops_autocreate.c b/tools/testing/selftests/bpf/progs/struct_ops_autocreate.c index 9a951ee6f55c..ba10c3896213 100644 --- a/tools/testing/selftests/bpf/progs/struct_ops_autocreate.c +++ b/tools/testing/selftests/bpf/progs/struct_ops_autocreate.c @@ -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, +}; -- cgit v1.2.3-59-g8ed1b