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/*
* NULL I/O backing store routine
*
* Copyright (C) 2008 Alexander Nezhinsky <nezhinsky@gmail.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2 of the
* License.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include <errno.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include "list.h"
#include "tgtd.h"
#include "scsi.h"
#define NULL_BS_DEV_SIZE (1ULL << 40)
int bs_null_cmd_submit(struct scsi_cmd *cmd)
{
scsi_set_result(cmd, SAM_STAT_GOOD);
return 0;
}
static int bs_null_open(struct scsi_lu *lu, char *path,
int *fd, uint64_t *size)
{
*size = NULL_BS_DEV_SIZE;
dprintf("NULL backing store open, size: %" PRIu64 "\n", *size);
return 0;
}
static void bs_null_close(struct scsi_lu *lu)
{
}
static struct backingstore_template null_bst = {
.bs_name = "null",
.bs_datasize = 0,
.bs_open = bs_null_open,
.bs_close = bs_null_close,
.bs_cmd_submit = bs_null_cmd_submit,
};
__attribute__((constructor)) static void bs_null_constructor(void)
{
register_backingstore_template(&null_bst);
}
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