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/cdefs.h> 28 #include <sys/types.h> 29 #include <sys/time.h> 30 #include <stdint.h> 31 #include <stdio.h> 32 #include <stdlib.h> 33 #include <string.h> 34 #include <unistd.h> 35 36 #include <libnvpair.h> 37 #include <sys/vdev_impl.h> 38 39 #include "fstyp.h" 40 41 int 42 fstyp_zfs(FILE *fp, char *label, size_t labelsize) 43 { 44 vdev_label_t *vdev_label = NULL; 45 vdev_phys_t *vdev_phys; 46 const char *zpool_name = NULL; 47 nvlist_t *config = NULL; 48 int err = 0; 49 50 /* 51 * Read in the first ZFS vdev label ("L0"), located at the beginning 52 * of the vdev and extract the pool name from it. 53 * 54 * TODO: the checksum of label should be validated. 55 */ 56 vdev_label = (vdev_label_t *)read_buf(fp, 0, sizeof(*vdev_label)); 57 if (vdev_label == NULL) 58 return (1); 59 60 vdev_phys = &(vdev_label->vl_vdev_phys); 61 62 if ((nvlist_unpack(vdev_phys->vp_nvlist, sizeof(vdev_phys->vp_nvlist), 63 &config, 0)) == 0 && 64 (nvlist_lookup_string(config, "name", &zpool_name) == 0)) { 65 strlcpy(label, zpool_name, labelsize); 66 } else 67 err = 1; 68 69 nvlist_free(config); 70 free(vdev_label); 71 72 return (err); 73 } 74