57ddeb86b3
A previous commit updated the verifier to print an accurate failure message for when someone specifies a nonzero return value from an async callback. This adds a testcase for validating that the verifier emits the correct message in such a case. Signed-off-by: David Vernet <void@manifault.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20231009161414.235829-2-void@manifault.com
47 lines
980 B
C
47 lines
980 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */
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#include <linux/bpf.h>
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#include <time.h>
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#include <errno.h>
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#include <bpf/bpf_helpers.h>
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#include "bpf_misc.h"
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#include "bpf_tcp_helpers.h"
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char _license[] SEC("license") = "GPL";
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struct elem {
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struct bpf_timer t;
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};
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struct {
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__uint(type, BPF_MAP_TYPE_ARRAY);
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__uint(max_entries, 1);
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__type(key, int);
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__type(value, struct elem);
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} timer_map SEC(".maps");
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static int timer_cb_ret1(void *map, int *key, struct bpf_timer *timer)
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{
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if (bpf_get_smp_processor_id() % 2)
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return 1;
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else
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return 0;
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}
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SEC("fentry/bpf_fentry_test1")
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__failure __msg("should have been in (0x0; 0x0)")
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int BPF_PROG2(test_ret_1, int, a)
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{
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int key = 0;
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struct bpf_timer *timer;
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timer = bpf_map_lookup_elem(&timer_map, &key);
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if (timer) {
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bpf_timer_init(timer, &timer_map, CLOCK_BOOTTIME);
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bpf_timer_set_callback(timer, timer_cb_ret1);
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bpf_timer_start(timer, 1000, 0);
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}
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return 0;
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}
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