// SPDX-License-Identifier: GPL-2.0
#include <sys/mman.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/time.h>
#include <sys/resource.h>
#include "kselftest.h"

static void test_limit(void)
{
        struct rlimit lims;
        void *map;

        if (getrlimit(RLIMIT_MEMLOCK, &lims))
                ksft_exit_fail_msg("getrlimit: %s\n", strerror(errno));

        if (mlockall(MCL_ONFAULT | MCL_FUTURE))
                ksft_exit_fail_msg("mlockall: %s\n", strerror(errno));

        map = mmap(NULL, 2 * lims.rlim_max, PROT_READ | PROT_WRITE,
                   MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE, -1, 0);

        ksft_test_result(map == MAP_FAILED, "The map failed respecting mlock limits\n");

        if (map != MAP_FAILED)
                munmap(map, 2 * lims.rlim_max);
        munlockall();
}

int main(int argc, char **argv)
{
        ksft_print_header();
        ksft_set_plan(1);

        if (!getuid())
                ksft_test_result_skip("The test must be run from a normal user\n");
        else
                test_limit();

        ksft_finished();
}