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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
*/
/* Test interoperability with oldstyle servers. */
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <stdint.h>
#include <inttypes.h>
#include <string.h>
#include <errno.h>
#include <libnbd.h>
#define SIZE 65536
#define XSTR(s) #s
#define STR(s) XSTR (s)
static char wbuf[512] = { 1, 2, 3, 4 }, rbuf[512];
static const char *progname;
static int
pread_cb (void *data,
const void *buf, size_t count, uint64_t offset,
unsigned status, int *error)
{
int *calls;
calls = data;
++*calls;
if (buf != rbuf || count != sizeof rbuf) {
fprintf (stderr, "%s: callback called with wrong buffer\n", progname);
exit (EXIT_FAILURE);
}
if (offset != 2 * sizeof rbuf) {
fprintf (stderr, "%s: callback called with wrong offset\n", progname);
exit (EXIT_FAILURE);
}
if (*error != 0) {
fprintf (stderr, "%s: callback called with unexpected error\n", progname);
exit (EXIT_FAILURE);
}
if (status != LIBNBD_READ_DATA) {
fprintf (stderr, "%s: callback called with wrong status\n", progname);
exit (EXIT_FAILURE);
}
if (memcmp (rbuf, wbuf, sizeof rbuf) != 0) {
fprintf (stderr, "%s: DATA INTEGRITY ERROR!\n", progname);
exit (EXIT_FAILURE);
}
if (*calls > 1) {
*error = ECONNREFUSED; /* Something NBD servers can't send */
return -1;
}
return 0;
}
int
main (int argc, char *argv[])
{
struct nbd_handle *nbd;
int64_t r;
char *args[] = { NBDKIT, "-s", "-o", "--exit-with-parent", "-v",
"memory", "size=" STR (SIZE), NULL };
int calls = 0;
nbd_chunk_callback chunk_callback = { .callback = pread_cb,
.user_data = &calls };
const char *s;
progname = argv[0];
/* Initial sanity check that we can't require TLS */
nbd = nbd_create ();
if (nbd == NULL) {
fprintf (stderr, "%s\n", nbd_get_error ());
exit (EXIT_FAILURE);
}
if (nbd_supports_tls (nbd)) {
if (nbd_set_tls (nbd, LIBNBD_TLS_REQUIRE) == -1) {
fprintf (stderr, "%s\n", nbd_get_error ());
exit (EXIT_FAILURE);
}
if (nbd_connect_command (nbd, args) != -1) {
fprintf (stderr, "%s\n", "expected failure");
exit (EXIT_FAILURE);
}
}
nbd_close (nbd);
/* Now for a working connection. Requesting an export name and opt_mode
* have no effects.
*/
nbd = nbd_create ();
if (nbd == NULL ||
nbd_set_opt_mode (nbd, true) == -1 ||
nbd_add_meta_context (nbd, LIBNBD_CONTEXT_BASE_ALLOCATION) == -1 ||
nbd_set_export_name (nbd, "ignored") == -1 ||
nbd_connect_command (nbd, args) == -1) {
fprintf (stderr, "%s\n", nbd_get_error ());
exit (EXIT_FAILURE);
}
/* Protocol should be "oldstyle", with no structured replies or meta
* contexts.
*/
if (nbd_aio_is_ready (nbd) != true) {
fprintf (stderr, "unexpected state after connection\n");
exit (EXIT_FAILURE);
}
s = nbd_get_protocol (nbd);
if (strcmp (s, "oldstyle") != 0) {
fprintf (stderr,
"incorrect protocol \"%s\", expected \"oldstyle\"\n", s);
exit (EXIT_FAILURE);
}
if ((r = nbd_get_structured_replies_negotiated (nbd)) != 0) {
fprintf (stderr,
"incorrect structured replies %" PRId64 ", expected 0\n", r);
exit (EXIT_FAILURE);
}
if ((r = nbd_can_meta_context (nbd, LIBNBD_CONTEXT_BASE_ALLOCATION)) != 0) {
fprintf (stderr,
"incorrect meta context %" PRId64 ", expected 0\n", r);
exit (EXIT_FAILURE);
}
if ((r = nbd_get_size (nbd)) == -1) {
fprintf (stderr, "%s\n", nbd_get_error ());
exit (EXIT_FAILURE);
}
if (r != SIZE) {
fprintf (stderr, "%s: test failed: incorrect size, "
"actual %" PRIi64 ", expected %d",
argv[0], r, SIZE);
exit (EXIT_FAILURE);
}
/* Plain I/O */
if (nbd_pwrite (nbd, wbuf, sizeof wbuf, 2 * sizeof wbuf, 0) == -1) {
fprintf (stderr, "%s\n", nbd_get_error ());
exit (EXIT_FAILURE);
}
if (nbd_pread (nbd, rbuf, sizeof rbuf, 2 * sizeof rbuf, 0) == -1) {
fprintf (stderr, "%s\n", nbd_get_error ());
exit (EXIT_FAILURE);
}
if (memcmp (rbuf, wbuf, sizeof rbuf) != 0) {
fprintf (stderr, "%s: DATA INTEGRITY ERROR!\n", argv[0]);
exit (EXIT_FAILURE);
}
/* Test again for callback operation. */
memset (rbuf, 0, sizeof rbuf);
if (nbd_pread_structured (nbd, rbuf, sizeof rbuf, 2 * sizeof rbuf,
chunk_callback, 0) == -1) {
fprintf (stderr, "%s\n", nbd_get_error ());
exit (EXIT_FAILURE);
}
if (calls != 1) {
fprintf (stderr, "%s: callback called wrong number of times\n", argv[0]);
exit (EXIT_FAILURE);
}
if (memcmp (rbuf, wbuf, sizeof rbuf) != 0) {
fprintf (stderr, "%s: DATA INTEGRITY ERROR!\n", argv[0]);
exit (EXIT_FAILURE);
}
/* Also test that callback errors are reflected correctly. */
if (nbd_pread_structured (nbd, rbuf, sizeof rbuf, 2 * sizeof rbuf,
chunk_callback, 0) != -1) {
fprintf (stderr, "%s: expected failure from callback\n", argv[0]);
exit (EXIT_FAILURE);
}
if (nbd_get_errno () != ECONNREFUSED) {
fprintf (stderr, "%s: wrong errno value after failed callback\n", argv[0]);
exit (EXIT_FAILURE);
}
if (nbd_shutdown (nbd, 0) == -1) {
fprintf (stderr, "%s\n", nbd_get_error ());
exit (EXIT_FAILURE);
}
nbd_close (nbd);
exit (EXIT_SUCCESS);
}
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