From baeead213e67a9554d589a2845c634b8e473d107 Mon Sep 17 00:00:00 2001 From: Hengqi Chen Date: Sun, 28 Nov 2021 22:16:33 +0800 Subject: selftests/bpf: Test BPF_MAP_TYPE_PROG_ARRAY static initialization Add testcase for BPF_MAP_TYPE_PROG_ARRAY static initialization. Signed-off-by: Hengqi Chen Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20211128141633.502339-3-hengqi.chen@gmail.com --- .../selftests/bpf/progs/test_prog_array_init.c | 39 ++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/test_prog_array_init.c (limited to 'tools/testing/selftests/bpf/progs/test_prog_array_init.c') diff --git a/tools/testing/selftests/bpf/progs/test_prog_array_init.c b/tools/testing/selftests/bpf/progs/test_prog_array_init.c new file mode 100644 index 000000000000..2cd138356126 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_prog_array_init.c @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2021 Hengqi Chen */ + +#include "vmlinux.h" +#include +#include + +const volatile pid_t my_pid = 0; +int value = 0; + +SEC("raw_tp/sys_enter") +int tailcall_1(void *ctx) +{ + value = 42; + return 0; +} + +struct { + __uint(type, BPF_MAP_TYPE_PROG_ARRAY); + __uint(max_entries, 2); + __uint(key_size, sizeof(__u32)); + __array(values, int (void *)); +} prog_array_init SEC(".maps") = { + .values = { + [1] = (void *)&tailcall_1, + }, +}; + +SEC("raw_tp/sys_enter") +int entry(void *ctx) +{ + pid_t pid = bpf_get_current_pid_tgid() >> 32; + + if (pid != my_pid) + return 0; + + bpf_tail_call(ctx, &prog_array_init, 1); + return 0; +} -- cgit