From 43d50ffb1f7e32865cdd343224659614d8b558b9 Mon Sep 17 00:00:00 2001 From: Kui-Feng Lee Date: Thu, 23 May 2024 10:42:02 -0700 Subject: [PATCH] selftests/bpf: Test global bpf_list_head arrays. Make sure global arrays of bpf_list_heads and fields of bpf_list_heads in nested struct types work correctly. Acked-by: Eduard Zingerman Signed-off-by: Kui-Feng Lee Link: https://lore.kernel.org/r/20240523174202.461236-10-thinker.li@gmail.com Signed-off-by: Alexei Starovoitov --- .../selftests/bpf/prog_tests/linked_list.c | 12 ++++++ .../testing/selftests/bpf/progs/linked_list.c | 42 +++++++++++++++++++ 2 files changed, 54 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/linked_list.c b/tools/testing/selftests/bpf/prog_tests/linked_list.c index 2fb89de63bd2..77d07e0a4a55 100644 --- a/tools/testing/selftests/bpf/prog_tests/linked_list.c +++ b/tools/testing/selftests/bpf/prog_tests/linked_list.c @@ -183,6 +183,18 @@ static void test_linked_list_success(int mode, bool leave_in_map) if (!leave_in_map) clear_fields(skel->maps.bss_A); + ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.global_list_push_pop_nested), &opts); + ASSERT_OK(ret, "global_list_push_pop_nested"); + ASSERT_OK(opts.retval, "global_list_push_pop_nested retval"); + if (!leave_in_map) + clear_fields(skel->maps.bss_A); + + ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.global_list_array_push_pop), &opts); + ASSERT_OK(ret, "global_list_array_push_pop"); + ASSERT_OK(opts.retval, "global_list_array_push_pop retval"); + if (!leave_in_map) + clear_fields(skel->maps.bss_A); + if (mode == PUSH_POP) goto end; diff --git a/tools/testing/selftests/bpf/progs/linked_list.c b/tools/testing/selftests/bpf/progs/linked_list.c index 26205ca80679..f69bf3e30321 100644 --- a/tools/testing/selftests/bpf/progs/linked_list.c +++ b/tools/testing/selftests/bpf/progs/linked_list.c @@ -11,6 +11,22 @@ #include "linked_list.h" +struct head_nested_inner { + struct bpf_spin_lock lock; + struct bpf_list_head head __contains(foo, node2); +}; + +struct head_nested { + int dummy; + struct head_nested_inner inner; +}; + +private(C) struct bpf_spin_lock glock_c; +private(C) struct bpf_list_head ghead_array[2] __contains(foo, node2); +private(C) struct bpf_list_head ghead_array_one[1] __contains(foo, node2); + +private(D) struct head_nested ghead_nested; + static __always_inline int list_push_pop(struct bpf_spin_lock *lock, struct bpf_list_head *head, bool leave_in_map) { @@ -309,6 +325,32 @@ int global_list_push_pop(void *ctx) return test_list_push_pop(&glock, &ghead); } +SEC("tc") +int global_list_push_pop_nested(void *ctx) +{ + return test_list_push_pop(&ghead_nested.inner.lock, &ghead_nested.inner.head); +} + +SEC("tc") +int global_list_array_push_pop(void *ctx) +{ + int r; + + r = test_list_push_pop(&glock_c, &ghead_array[0]); + if (r) + return r; + + r = test_list_push_pop(&glock_c, &ghead_array[1]); + if (r) + return r; + + /* Arrays with only one element is a special case, being treated + * just like a bpf_list_head variable by the verifier, not an + * array. + */ + return test_list_push_pop(&glock_c, &ghead_array_one[0]); +} + SEC("tc") int map_list_push_pop_multiple(void *ctx) { -- 2.20.1