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
40 int
fstyp_zfs(FILE * fp,char * label,size_t labelsize)41 fstyp_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