/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (c) 2023 Meta Platforms, Inc. and affiliates.
 * Copyright (c) 2023 David Vernet <dvernet@meta.com>
 * Copyright (c) 2023 Tejun Heo <tj@kernel.org>
 */
#include <bpf/bpf.h>
#include <scx/common.h>
#include <sys/wait.h>
#include <unistd.h>
#include "enq_last_no_enq_fails.bpf.skel.h"
#include "scx_test.h"

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

        skel = enq_last_no_enq_fails__open();
        SCX_FAIL_IF(!skel, "Failed to open");
        SCX_ENUM_INIT(skel);
        SCX_FAIL_IF(enq_last_no_enq_fails__load(skel), "Failed to load skel");

        *ctx = skel;

        return SCX_TEST_PASS;
}

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

        link = bpf_map__attach_struct_ops(skel->maps.enq_last_no_enq_fails_ops);
        if (!link) {
                SCX_ERR("Incorrectly failed at attaching scheduler");
                return SCX_TEST_FAIL;
        }
        if (!skel->bss->exit_kind) {
                SCX_ERR("Incorrectly stayed loaded");
                return SCX_TEST_FAIL;
        }

        bpf_link__destroy(link);

        return SCX_TEST_PASS;
}

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

        enq_last_no_enq_fails__destroy(skel);
}

struct scx_test enq_last_no_enq_fails = {
        .name = "enq_last_no_enq_fails",
        .description = "Verify we eject a scheduler if we specify "
                       "the SCX_OPS_ENQ_LAST flag without defining "
                       "ops.enqueue()",
        .setup = setup,
        .run = run,
        .cleanup = cleanup,
};
REGISTER_SCX_TEST(&enq_last_no_enq_fails)