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      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 (at) FreeBSD.org>
      6  * Copyright (c) 2015 Xin LI <delphij (at) 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 (at) 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
     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