1 /* $NetBSD: zfs.c,v 1.1 2018/01/09 03:31:15 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2017 The NetBSD Foundation, Inc.
5 * Copyright (c) 2015 Allan Jude <allanjude@FreeBSD.org>
6 * Copyright (c) 2015 Xin LI <delphij@FreeBSD.org>
7 * All rights reserved.
8 *
9 * This code is derived from software contributed to The NetBSD Foundation
10 * by Tomohiro Kusumi <kusumi.tomohiro@gmail.com>.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33 #include <sys/cdefs.h>
34 __RCSID("$NetBSD: zfs.c,v 1.1 2018/01/09 03:31:15 christos Exp $");
35
36 #include <sys/types.h>
37 #include <cddl/osnet/sys/sys/types.h>
38 #include <sys/time.h>
39 #include <cddl/osnet/sys/sys/time.h>
40 #include <stdint.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <unistd.h>
45
46 #include <libnvpair.h>
47 #include <sys/vdev_impl.h>
48
49 #include "fstyp.h"
50
51 int
fstyp_zfs(FILE * fp,char * label,size_t labelsize)52 fstyp_zfs(FILE *fp, char *label, size_t labelsize)
53 {
54 vdev_label_t *vdev_label = NULL;
55 vdev_phys_t *vdev_phys;
56 char *zpool_name = NULL;
57 nvlist_t *config = NULL;
58 int err = 0;
59
60 /*
61 * Read in the first ZFS vdev label ("L0"), located at the beginning
62 * of the vdev and extract the pool name from it.
63 *
64 * TODO: the checksum of label should be validated.
65 */
66 vdev_label = (vdev_label_t *)read_buf(fp, 0, sizeof(*vdev_label));
67 if (vdev_label == NULL)
68 return 1;
69
70 vdev_phys = &(vdev_label->vl_vdev_phys);
71
72 if ((nvlist_unpack(vdev_phys->vp_nvlist, sizeof(vdev_phys->vp_nvlist),
73 &config, 0)) == 0 &&
74 (nvlist_lookup_string(config, "name", &zpool_name) == 0)) {
75 strlcpy(label, zpool_name, labelsize);
76 } else
77 err = 1;
78
79 nvlist_free(config);
80 free(vdev_label);
81
82 return err;
83 }
84