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/* nbdkit
* Copyright Red Hat
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of Red Hat nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''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 RED HAT OR
* CONTRIBUTORS 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 <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <stdint.h>
#include <inttypes.h>
#include <unistd.h>
#include <errno.h>
#include <libnbd.h>
#include "requires.h"
int
main (int argc, char *argv[])
{
struct nbd_handle *nbd;
char buf[1024];
int r;
/* Check "disk" was created before running the test. */
requires_exists ("disk");
nbd = nbd_create ();
if (nbd == NULL) {
fprintf (stderr, "%s\n", nbd_get_error ());
exit (EXIT_FAILURE);
}
if (nbd_connect_command (nbd,
(char *[]) {
"nbdkit", "-s", "--exit-with-parent",
"-v", "-D", "protect.write=1",
"--filter=protect",
"--filter=cow",
"file", "disk",
"protect=~0x1be-",
NULL }) == -1) {
fprintf (stderr, "%s\n", nbd_get_error ());
exit (EXIT_FAILURE);
}
/* Read the first two sectors. */
if (nbd_pread (nbd, buf, sizeof buf, 0, 0) == -1) {
fprintf (stderr, "%s\n", nbd_get_error ());
exit (EXIT_FAILURE);
}
/* Modifying the second sector should be possible. */
buf[512] = 1;
buf[513] = 2;
buf[514] = 3;
if (nbd_pwrite (nbd, buf, sizeof buf, 0, 0) == -1) {
fprintf (stderr, "%s\n", nbd_get_error ());
exit (EXIT_FAILURE);
}
/* Modifying the partition table should be possible. */
buf[0x1be] = 1;
buf[0x1bf] = 2;
buf[0x1c0] = 3;
if (nbd_pwrite (nbd, buf, sizeof buf, 0, 0) == -1) {
fprintf (stderr, "%s\n", nbd_get_error ());
exit (EXIT_FAILURE);
}
/* Modifying the beginning of the disk must return EPERM. */
buf[0] = 1;
buf[1] = 2;
buf[2] = 3;
r = nbd_pwrite (nbd, buf, sizeof buf, 0, 0);
if (r != -1) {
fprintf (stderr,
"%s: protect filter did not protect boot sector\n",
argv[0]);
exit (EXIT_FAILURE);
}
if (nbd_get_errno () != EPERM) {
fprintf (stderr,
"%s: protect filter did not return EPERM error "
"(instead: %s)\n",
argv[0], nbd_get_error ());
exit (EXIT_FAILURE);
}
nbd_shutdown (nbd, 0);
nbd_close (nbd);
exit (EXIT_SUCCESS);
}
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