tests-mx32/ioprio.c

/*
 * Check decoding of ioprio_get and ioprio_set syscalls.
 *
 * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "tests.h"

#include <asm/unistd.h>

#if defined(__NR_ioprio_get) && defined(__NR_ioprio_set)

# include <stdio.h>
# include <unistd.h>

enum {
	IOPRIO_CLASS_NONE,
	IOPRIO_CLASS_RT,
	IOPRIO_CLASS_BE,
	IOPRIO_CLASS_IDLE
};

# include "xlat.h"
# include "xlat/ioprio_class.h"

void
print_ioprio(unsigned long val)
{
	printf(" (IOPRIO_PRIO_VALUE(");
	printxval(ioprio_class, val >> 13, "IOPRIO_CLASS_???");
	printf(", %d))", (int) (val & 0x1fff));
}

int
main(void)
{
	static const kernel_ulong_t bogus_which =
		(kernel_ulong_t) 0xdeadfacefa57beefULL;
	static const kernel_ulong_t bogus_who =
		(kernel_ulong_t) 0xbadc0dedda7a1057ULL;
	static const kernel_ulong_t bogus_ioprio =
		(kernel_ulong_t) 0xdec0ded1facefeedULL;
	static const char * const bogus_ioprio_str =
		"IOPRIO_PRIO_VALUE(0x7d677 /* IOPRIO_CLASS_??? */, 7917)";

	long rc;

	rc = syscall(__NR_ioprio_get, bogus_which, bogus_who);
	printf("ioprio_get(%#x /* IOPRIO_WHO_??? */, %d) = %s\n",
	       (int) bogus_which, (int) bogus_who, sprintrc(rc));

	rc = syscall(__NR_ioprio_get, 1, 0);
	printf("ioprio_get(IOPRIO_WHO_PROCESS, 0) = %s", sprintrc(rc));

	if (rc >= -1)
		print_ioprio(rc);

	puts("");

	rc = syscall(__NR_ioprio_set, 2, 0, 8191);
	printf("ioprio_set(IOPRIO_WHO_PGRP, 0, "
	       "IOPRIO_PRIO_VALUE(IOPRIO_CLASS_NONE, 8191)) = %s\n",
	       sprintrc(rc));

	rc = syscall(__NR_ioprio_set, bogus_which, bogus_who, bogus_ioprio);
	printf("ioprio_set(%#x /* IOPRIO_WHO_??? */, %d, %s) = %s\n",
	       (int) bogus_which, (int) bogus_who, bogus_ioprio_str,
	       sprintrc(rc));

	puts("+++ exited with 0 +++");

	return 0;
}

#else

SKIP_MAIN_UNDEFINED("__NR_ioprio_get && __NR_ioprio_set");

#endif