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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
*/
/* Handle --can and --cannot flags (and synonyms). */
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <libnbd.h>
#include "nbdinfo.h"
int can_exit_code;
void
do_can (void)
{
int feature;
assert (can);
if (strcasecmp (can, "connect") == 0 ||
strcasecmp (can, "read") == 0)
feature = 1;
else if (strcasecmp (can, "tls") == 0)
feature = nbd_get_tls_negotiated (nbd);
else if (strcasecmp (can, "sr") == 0 ||
strcasecmp (can, "structured") == 0 ||
strcasecmp (can, "structured reply") == 0 ||
strcasecmp (can, "structured-reply") == 0 ||
strcasecmp (can, "structured_reply") == 0 ||
strcasecmp (can, "structured replies") == 0 ||
strcasecmp (can, "structured-replies") == 0 ||
strcasecmp (can, "structured_replies") == 0)
feature = nbd_get_structured_replies_negotiated (nbd);
else if (strcasecmp (can, "eh") == 0 ||
strcasecmp (can, "extended header") == 0 ||
strcasecmp (can, "extended-header") == 0 ||
strcasecmp (can, "extended_header") == 0 ||
strcasecmp (can, "extended headers") == 0 ||
strcasecmp (can, "extended-headers") == 0 ||
strcasecmp (can, "extended_headers") == 0)
feature = nbd_get_extended_headers_negotiated (nbd);
else if (strcasecmp (can, "readonly") == 0 ||
strcasecmp (can, "read-only") == 0 ||
strcasecmp (can, "read_only") == 0)
feature = nbd_is_read_only (nbd);
else if (strcasecmp (can, "write") == 0) {
feature = nbd_is_read_only (nbd);
if (feature >= 0) feature = !feature;
}
else if (strcasecmp (can, "rotational") == 0)
feature = nbd_is_rotational (nbd);
else if (strcasecmp (can, "block status payload") == 0 ||
strcasecmp (can, "block-status-payload") == 0 ||
strcasecmp (can, "block_status_payload") == 0)
feature = nbd_can_block_status_payload (nbd);
else if (strcasecmp (can, "cache") == 0)
feature = nbd_can_cache (nbd);
else if (strcasecmp (can, "df") == 0)
feature = nbd_can_df (nbd);
else if (strcasecmp (can, "fastzero") == 0 ||
strcasecmp (can, "fast-zero") == 0 ||
strcasecmp (can, "fast_zero") == 0)
feature = nbd_can_fast_zero (nbd);
else if (strcasecmp (can, "flush") == 0)
feature = nbd_can_flush (nbd);
else if (strcasecmp (can, "fua") == 0)
feature = nbd_can_fua (nbd);
else if (strcasecmp (can, "multiconn") == 0 ||
strcasecmp (can, "multi-conn") == 0 ||
strcasecmp (can, "multi_conn") == 0)
feature = nbd_can_multi_conn (nbd);
else if (strcasecmp (can, "trim") == 0)
feature = nbd_can_trim (nbd);
else if (strcasecmp (can, "zero") == 0)
feature = nbd_can_zero (nbd);
else {
const char *what =
!cannot ? "--can/--is/--has" : "--cannot/--isnt/--hasnt";
fprintf (stderr, "%s: unknown %s option: %s\n", progname, what, can);
exit (EXIT_FAILURE);
}
if (feature == -1) {
fprintf (stderr, "%s: %s\n", progname, nbd_get_error ());
exit (EXIT_FAILURE);
}
/* If cannot, negate the result. */
if (cannot)
feature = !feature;
/* Translate the feature bool into an exit code. This is used in main(). */
can_exit_code = feature ? EXIT_SUCCESS : 2;
}
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