61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2017 Cyril Hrubis <chrubis@suse.cz>
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*/
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/*
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* Basic test for the BLKRASET and BLKRAGET ioctls.
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*
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* Sets device read-ahead, reads it back and compares the values.
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*
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* The read-ahead value was choosen to be multiple of 512, since it's rounded
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* based on page size on BLKRASET and 512 should be safe enough for everyone.
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*/
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#include <errno.h>
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#include <sys/mount.h>
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#include "tst_test.h"
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static int fd;
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static void verify_ioctl(void)
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{
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unsigned long ra, rab, rao;
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SAFE_IOCTL(fd, BLKRAGET, &rao);
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tst_res(TINFO, "BLKRAGET original value %lu", rao);
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for (ra = 0; ra <= 4096; ra += 512) {
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SAFE_IOCTL(fd, BLKRASET, ra);
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SAFE_IOCTL(fd, BLKRAGET, &rab);
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if (ra == rab)
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tst_res(TPASS, "BLKRASET %lu read back correctly", ra);
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else
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tst_res(TFAIL, "BLKRASET %lu read back %lu", ra, rab);
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}
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tst_res(TINFO, "BLKRASET restoring original value %lu", rao);
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SAFE_IOCTL(fd, BLKRASET, rao);
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}
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static void setup(void)
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{
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fd = SAFE_OPEN(tst_device->dev, O_RDONLY);
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}
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static void cleanup(void)
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{
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if (fd > 0)
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SAFE_CLOSE(fd);
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}
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static struct tst_test test = {
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.needs_root = 1,
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.needs_device = 1,
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.setup = setup,
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.cleanup = cleanup,
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.test_all = verify_ioctl,
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};
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