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);
+}