1/*-
2 * Copyright (c) 2015 Allan Jude <allanjude@FreeBSD.org>
3 * Copyright (c) 2015 Xin LI <delphij@FreeBSD.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD$");
30
31#include <sys/types.h>
32#include <cddl/compat/opensolaris/sys/types.h>
33#include <sys/time.h>
34#include <cddl/compat/opensolaris/sys/time.h>
35#include <stdint.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39#include <unistd.h>
40
41#include <libnvpair.h>
42#include <sys/vdev_impl.h>
43
44#include "fstyp.h"
45
46int
47fstyp_zfs(FILE *fp, char *label, size_t labelsize)
48{
49	vdev_label_t *vdev_label = NULL;
50	vdev_phys_t *vdev_phys;
51	char *zpool_name = NULL;
52	nvlist_t *config = NULL;
53	int err = 0;
54
55	/*
56	 * Read in the first ZFS vdev label ("L0"), located at the beginning
57	 * of the vdev and extract the pool name from it.
58	 *
59	 * TODO: the checksum of label should be validated.
60	 */
61	vdev_label = (vdev_label_t *)read_buf(fp, 0, sizeof(*vdev_label));
62	if (vdev_label == NULL)
63		return (1);
64
65	vdev_phys = &(vdev_label->vl_vdev_phys);
66
67	if ((nvlist_unpack(vdev_phys->vp_nvlist, sizeof(vdev_phys->vp_nvlist),
68	    &config, 0)) == 0 &&
69	    (nvlist_lookup_string(config, "name", &zpool_name) == 0)) {
70		strlcpy(label, zpool_name, labelsize);
71	} else
72		err = 1;
73
74	nvlist_free(config);
75	free(vdev_label);
76
77	return (err);
78}
79