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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 <stdbool.h>
#include <string.h>
#include <errno.h>
#include <libnbd.h>
static char *progname;
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);
}
}
struct progress {
int id;
bool call_freed;
bool comp_freed;
};
static int
list_call (void *user_data, const char *name, const char *description)
{
struct progress *p = user_data;
fprintf (stderr, "%s: list callback should not be reached, iter %d\n",
progname, p->id);
exit (EXIT_FAILURE);
}
static void
list_free (void *user_data)
{
struct progress *p = user_data;
if (p->comp_freed) {
fprintf (stderr, "%s: list free called too late, iter %d\n",
progname, p->id);
exit (EXIT_FAILURE);
}
p->call_freed = true;
}
static int
comp_call (void *user_data, int *error)
{
struct progress *p = user_data;
fprintf (stderr, "%s: list callback should not be reached, iter %d\n",
progname, p->id);
exit (EXIT_FAILURE);
}
static void
comp_free (void *user_data)
{
struct progress *p = user_data;
if (!p->call_freed) {
fprintf (stderr, "%s: completion free called too early, iter %d\n",
progname, p->id);
exit (EXIT_FAILURE);
}
p->comp_freed = true;
}
int
main (int argc, char *argv[])
{
struct nbd_handle *nbd;
const char *cmd[] = {
NBDKIT, "-s", "-v", "--exit-with-parent", "memory", "1048576", NULL
};
struct progress p;
nbd_list_callback list_cb = { .callback = list_call,
.user_data = &p,
.free = list_free };
nbd_completion_callback comp_cb = { .callback = comp_call,
.user_data = &p,
.free = comp_free };
progname = argv[0];
nbd = nbd_create ();
if (nbd == NULL) {
fprintf (stderr, "%s\n", nbd_get_error ());
exit (EXIT_FAILURE);
}
/* Too early to try nbd_aio_opt_*. */
p = (struct progress) { .id = 0 };
if (nbd_aio_opt_list (nbd, list_cb, comp_cb) != -1) {
fprintf (stderr, "%s: test failed: "
"nbd_aio_opt_list did not reject attempt in wrong state\n",
argv[0]);
exit (EXIT_FAILURE);
}
check (ENOTCONN, "nbd_aio_opt_list: ");
if (!p.call_freed || !p.comp_freed) {
fprintf (stderr, "%s: test failed: "
"nbd_aio_opt_list did not call .free callbacks\n",
argv[0]);
exit (EXIT_FAILURE);
}
/* Connect to the server without requesting negotiation mode. */
if (nbd_connect_command (nbd, (char **)cmd) == -1) {
fprintf (stderr, "%s: %s\n", argv[0], nbd_get_error ());
exit (EXIT_FAILURE);
}
/* Too late to try nbd_aio_opt_*. */
p = (struct progress) { .id = 1 };
if (nbd_aio_opt_list (nbd, list_cb, comp_cb) != -1) {
fprintf (stderr, "%s: test failed: "
"nbd_aio_opt_list did not reject attempt in wrong state\n",
argv[0]);
exit (EXIT_FAILURE);
}
check (EINVAL, "nbd_aio_opt_list: ");
if (!p.call_freed || !p.comp_freed) {
fprintf (stderr, "%s: test failed: "
"nbd_aio_opt_list did not call .free callbacks\n",
argv[0]);
exit (EXIT_FAILURE);
}
nbd_close (nbd);
exit (EXIT_SUCCESS);
}
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