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Diffstat (limited to 'usr.sbin/fstyp/zfs.c')
-rw-r--r-- | usr.sbin/fstyp/zfs.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/usr.sbin/fstyp/zfs.c b/usr.sbin/fstyp/zfs.c new file mode 100644 index 0000000..c37a5db --- /dev/null +++ b/usr.sbin/fstyp/zfs.c @@ -0,0 +1,78 @@ +/*- + * Copyright (c) 2015 Allan Jude <allanjude@FreeBSD.org> + * Copyright (c) 2015 Xin LI <delphij@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <cddl/compat/opensolaris/sys/types.h> +#include <sys/time.h> +#include <cddl/compat/opensolaris/sys/time.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include <libnvpair.h> +#include <sys/vdev_impl.h> + +#include "fstyp.h" + +int +fstyp_zfs(FILE *fp, char *label, size_t labelsize) +{ + vdev_label_t *vdev_label = NULL; + vdev_phys_t *vdev_phys; + char *zpool_name = NULL; + nvlist_t *config = NULL; + int err = 0; + + /* + * Read in the first ZFS vdev label ("L0"), located at the beginning + * of the vdev and extract the pool name from it. + * + * TODO: the checksum of label should be validated. + */ + vdev_label = (vdev_label_t *)read_buf(fp, 0, sizeof(*vdev_label)); + if (vdev_label == NULL) + return (1); + + vdev_phys = &(vdev_label->vl_vdev_phys); + + if ((nvlist_unpack(vdev_phys->vp_nvlist, sizeof(vdev_phys->vp_nvlist), + &config, 0)) == 0 && + (nvlist_lookup_string(config, "name", &zpool_name) == 0)) { + strlcpy(label, zpool_name, labelsize); + } else + err = 1; + + nvlist_free(config); + free(vdev_label); + + return (err); +} |