/*      $NetBSD: zfs.c,v 1.1 2018/01/09 03:31:15 christos Exp $ */

/*-
* Copyright (c) 2017 The NetBSD Foundation, Inc.
* Copyright (c) 2015 Allan Jude <[email protected]>
* Copyright (c) 2015 Xin LI <[email protected]>
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Tomohiro Kusumi <[email protected]>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: zfs.c,v 1.1 2018/01/09 03:31:15 christos Exp $");

#include <sys/types.h>
#include <cddl/osnet/sys/sys/types.h>
#include <sys/time.h>
#include <cddl/osnet/sys/sys/time.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <libnvpair.h>
#include <sys/vdev_impl.h>

#include "fstyp.h"

int
fstyp_zfs(FILE *fp, char *label, size_t labelsize)
{
       vdev_label_t *vdev_label = NULL;
       vdev_phys_t *vdev_phys;
       char *zpool_name = NULL;
       nvlist_t *config = NULL;
       int err = 0;

       /*
        * Read in the first ZFS vdev label ("L0"), located at the beginning
        * of the vdev and extract the pool name from it.
        *
        * TODO: the checksum of label should be validated.
        */
       vdev_label = (vdev_label_t *)read_buf(fp, 0, sizeof(*vdev_label));
       if (vdev_label == NULL)
               return 1;

       vdev_phys = &(vdev_label->vl_vdev_phys);

       if ((nvlist_unpack(vdev_phys->vp_nvlist, sizeof(vdev_phys->vp_nvlist),
           &config, 0)) == 0 &&
           (nvlist_lookup_string(config, "name", &zpool_name) == 0)) {
               strlcpy(label, zpool_name, labelsize);
       } else
               err = 1;

       nvlist_free(config);
       free(vdev_label);

       return err;
}