4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright (c) 2011, Fajar A. Nugraha. All rights reserved.
23 * Use is subject to license terms.
32 #include <linux/ioctl.h>
34 #include <sys/ioctl.h>
35 #include <sys/zfs_znode.h>
36 #include <sys/fs/zfs.h>
39 ioctl_get_msg(char *var, int fd)
42 char msg[ZFS_MAX_DATASET_NAME_LEN];
44 error = ioctl(fd, BLKZNAME, msg);
49 snprintf(var, ZFS_MAX_DATASET_NAME_LEN, "%s", msg);
54 main(int argc, char **argv)
57 char zvol_name[ZFS_MAX_DATASET_NAME_LEN];
58 char *zvol_name_part = NULL;
60 struct stat64 statbuf;
61 int dev_minor, dev_part;
66 printf("Usage: %s /dev/zvol_device_node\n", argv[0]);
71 error = stat64(dev_name, &statbuf);
73 printf("Unable to access device file: %s\n", dev_name);
77 dev_minor = minor(statbuf.st_rdev);
78 dev_part = dev_minor % ZVOL_MINORS;
80 fd = open(dev_name, O_RDONLY);
82 printf("Unable to open device file: %s\n", dev_name);
86 error = ioctl_get_msg(zvol_name, fd);
88 printf("ioctl_get_msg failed:%s\n", strerror(errno));
92 rc = asprintf(&zvol_name_part, "%s-part%d", zvol_name,
95 rc = asprintf(&zvol_name_part, "%s", zvol_name);
97 if (rc == -1 || zvol_name_part == NULL)
100 for (i = 0; i < strlen(zvol_name_part); i++) {
101 if (isblank(zvol_name_part[i]))
102 zvol_name_part[i] = '+';
105 printf("%s\n", zvol_name_part);
106 free(zvol_name_part);