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/* NBD client library in userspace
* Copyright Red Hat
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* Deliberately provoke some errors and check the error messages from
* nbd_get_error etc look reasonable.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <inttypes.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <libnbd.h>
#include "requires.h"
static char *progname;
static char buf[512];
static void
check (int experr, const char *prefix)
{
const char *msg = nbd_get_error ();
int errnum = nbd_get_errno ();
fprintf (stderr, "error: \"%s\"\n", msg);
fprintf (stderr, "errno: %d (%s)\n", errnum, strerror (errnum));
if (strncmp (msg, prefix, strlen (prefix)) != 0) {
fprintf (stderr, "%s: test failed: missing context prefix: %s\n",
progname, msg);
exit (EXIT_FAILURE);
}
if (errnum != experr) {
fprintf (stderr, "%s: test failed: "
"expected errno = %d (%s), but got %d\n",
progname, experr, strerror (experr), errnum);
exit (EXIT_FAILURE);
}
}
static void
check_server_fail (struct nbd_handle *h, int64_t cookie,
const char *cmd, int experr)
{
int r;
if (cookie == -1) {
fprintf (stderr, "%s: test failed: %s not sent to server\n",
progname, cmd);
exit (EXIT_FAILURE);
}
while ((r = nbd_aio_command_completed (h, cookie)) == 0) {
if (nbd_poll (h, -1) == -1) {
fprintf (stderr, "%s: test failed: poll failed while awaiting %s: %s\n",
progname, cmd, nbd_get_error ());
exit (EXIT_FAILURE);
}
}
if (r != -1) {
fprintf (stderr, "%s: test failed: %s did not fail at server\n",
progname, cmd);
exit (EXIT_FAILURE);
}
check (experr, "nbd_aio_command_completed: ");
}
int
main (int argc, char *argv[])
{
struct nbd_handle *nbd;
/* nbdkit 1.44 changes the name of the policy that rejects access to an
* unaligned tail; try the new spelling first, and fall back to the 1.42
* spelling if we fail to connect.
*/
char policy[] = "blocksize-error-policy=strict-error";
const char *cmd[] = {
NBDKIT, "-s", "-v", "--exit-with-parent",
"memory", "1025",
"--filter=blocksize-policy", "blocksize-minimum=512",
policy,
NULL
};
uint32_t strict;
progname = argv[0];
requires (NBDKIT " --version --filter=blocksize-policy null");
nbd = nbd_create ();
if (nbd == NULL) {
fprintf (stderr, "%s\n", nbd_get_error ());
exit (EXIT_FAILURE);
}
/* Connect to the server. */
if (nbd_connect_command (nbd, (char **)cmd) == -1) {
fprintf (stderr, "%s: %s\n", argv[0], nbd_get_error ());
/* See above comment on nbdkit versions. */
strcpy (policy, "blocksize-error-policy=error");
nbd_close (nbd);
nbd = nbd_create ();
if (nbd == NULL) {
fprintf (stderr, "%s\n", nbd_get_error ());
exit (EXIT_FAILURE);
}
if (nbd_connect_command (nbd, (char **)cmd) == -1) {
fprintf (stderr, "%s: %s\n", argv[0], nbd_get_error ());
exit (EXIT_FAILURE);
}
}
/* For debugging purposes, print the block size constraints exported
* by nbdkit.
*/
printf ("server block size minimum: %" PRId64 "\n",
nbd_get_block_size (nbd, LIBNBD_SIZE_MINIMUM));
printf ("server block size preferred: %" PRId64 "\n",
nbd_get_block_size (nbd, LIBNBD_SIZE_PREFERRED));
printf ("server block size maximum: %" PRId64 "\n",
nbd_get_block_size (nbd, LIBNBD_SIZE_MAXIMUM));
printf ("libnbd payload size maximum: %" PRId64 "\n",
nbd_get_block_size (nbd, LIBNBD_SIZE_PAYLOAD));
fflush (stdout);
/* Send an unaligned read, server-side */
strict = nbd_get_strict_mode (nbd) & ~LIBNBD_STRICT_ALIGN;
if (nbd_set_strict_mode (nbd, strict) == -1) {
fprintf (stderr, "%s\n", nbd_get_error ());
exit (EXIT_FAILURE);
}
check_server_fail (nbd,
nbd_aio_pread (nbd, buf, 1, 512, NBD_NULL_COMPLETION, 0),
"unaligned nbd_aio_pread count", EINVAL);
check_server_fail (nbd,
nbd_aio_pread (nbd, buf, 512, 1, NBD_NULL_COMPLETION, 0),
"unaligned nbd_aio_pread offset", EINVAL);
check_server_fail (nbd,
nbd_aio_pread (nbd, buf, 1, 1024, NBD_NULL_COMPLETION, 0),
"unaligned nbd_aio_pread tail", EINVAL);
nbd_close (nbd);
exit (EXIT_SUCCESS);
}
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