/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (c) 2024 Meta Platforms, Inc. and affiliates.
 * Copyright (c) 2024 David Vernet <dvernet@meta.com>
 * Copyright (c) 2024 Tejun Heo <tj@kernel.org>
 */
#include <bpf/bpf.h>
#include <scx/common.h>
#include <sys/wait.h>
#include <unistd.h>
#include "ddsp_bogus_dsq_fail.bpf.skel.h"
#include "scx_test.h"

static enum scx_test_status setup(void **ctx)
{
        struct ddsp_bogus_dsq_fail *skel;

        skel = ddsp_bogus_dsq_fail__open();
        SCX_FAIL_IF(!skel, "Failed to open");
        SCX_ENUM_INIT(skel);
        SCX_FAIL_IF(ddsp_bogus_dsq_fail__load(skel), "Failed to load skel");

        *ctx = skel;

        return SCX_TEST_PASS;
}

static enum scx_test_status run(void *ctx)
{
        struct ddsp_bogus_dsq_fail *skel = ctx;
        struct bpf_link *link;

        link = bpf_map__attach_struct_ops(skel->maps.ddsp_bogus_dsq_fail_ops);
        SCX_FAIL_IF(!link, "Failed to attach struct_ops");

        sleep(1);

        SCX_EQ(skel->data->uei.kind, EXIT_KIND(SCX_EXIT_ERROR));
        bpf_link__destroy(link);

        return SCX_TEST_PASS;
}

static void cleanup(void *ctx)
{
        struct ddsp_bogus_dsq_fail *skel = ctx;

        ddsp_bogus_dsq_fail__destroy(skel);
}

struct scx_test ddsp_bogus_dsq_fail = {
        .name = "ddsp_bogus_dsq_fail",
        .description = "Verify we gracefully fail, and fall back to using a "
                       "built-in DSQ, if we do a direct dispatch to an invalid"
                       " DSQ in ops.select_cpu()",
        .setup = setup,
        .run = run,
        .cleanup = cleanup,
};
REGISTER_SCX_TEST(&ddsp_bogus_dsq_fail)