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 <stdint.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <unistd.h> 37 38 #include <libnvpair.h> 39 #include <sys/vdev_impl.h> 40 41 #include "fstyp.h" 42 43 int 44 fstyp_zfs(FILE *fp, char *label, size_t labelsize) 45 { 46 vdev_label_t *vdev_label = NULL; 47 vdev_phys_t *vdev_phys; 48 char *zpool_name = NULL; 49 nvlist_t *config = NULL; 50 int err = 0; 51 52 /* 53 * Read in the first ZFS vdev label ("L0"), located at the beginning 54 * of the vdev and extract the pool name from it. 55 * 56 * TODO: the checksum of label should be validated. 57 */ 58 vdev_label = (vdev_label_t *)read_buf(fp, 0, sizeof(*vdev_label)); 59 if (vdev_label == NULL) 60 return (1); 61 62 vdev_phys = &(vdev_label->vl_vdev_phys); 63 64 if ((nvlist_unpack(vdev_phys->vp_nvlist, sizeof(vdev_phys->vp_nvlist), 65 &config, 0)) == 0 && 66 (nvlist_lookup_string(config, "name", &zpool_name) == 0)) { 67 strlcpy(label, zpool_name, labelsize); 68 } else 69 err = 1; 70 71 nvlist_free(config); 72 free(vdev_label); 73 74 return (err); 75 } 76