1/*-
2 * Copyright (c) 2015 Allan Jude <allanjude@FreeBSD.org>
3 * Copyright (c) 2015 Xin LI <delphij@FreeBSD.org>
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/types.h>
28#include <sys/time.h>
29#include <stdint.h>
30#include <stdio.h>
31#include <stdlib.h>
32#include <string.h>
33#include <unistd.h>
34
35#include <libnvpair.h>
36#include <sys/vdev_impl.h>
37
38#include "fstyp.h"
39
40int
41fstyp_zfs(FILE *fp, char *label, size_t labelsize)
42{
43	vdev_label_t *vdev_label = NULL;
44	vdev_phys_t *vdev_phys;
45	const char *zpool_name = NULL;
46	nvlist_t *config = NULL;
47	int err = 0;
48
49	/*
50	 * Read in the first ZFS vdev label ("L0"), located at the beginning
51	 * of the vdev and extract the pool name from it.
52	 *
53	 * TODO: the checksum of label should be validated.
54	 */
55	vdev_label = (vdev_label_t *)read_buf(fp, 0, sizeof(*vdev_label));
56	if (vdev_label == NULL)
57		return (1);
58
59	vdev_phys = &(vdev_label->vl_vdev_phys);
60
61	if ((nvlist_unpack(vdev_phys->vp_nvlist, sizeof(vdev_phys->vp_nvlist),
62	    &config, 0)) == 0 &&
63	    (nvlist_lookup_string(config, "name", &zpool_name) == 0)) {
64		strlcpy(label, zpool_name, labelsize);
65	} else
66		err = 1;
67
68	nvlist_free(config);
69	free(vdev_label);
70
71	return (err);
72}
73