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4c0d8e50 FN |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
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. | |
7 | * | |
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. | |
12 | * | |
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] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
22 | * Copyright (c) 2011, Fajar A. Nugraha. All rights reserved. | |
23 | * Use is subject to license terms. | |
24 | */ | |
25 | ||
ea04106b AX |
26 | #include <ctype.h> |
27 | #include <string.h> | |
4c0d8e50 FN |
28 | #include <stdio.h> |
29 | #include <stdlib.h> | |
30 | #include <fcntl.h> | |
31 | #include <unistd.h> | |
32 | #include <linux/ioctl.h> | |
33 | #include <sys/stat.h> | |
34 | #include <sys/ioctl.h> | |
35 | #include <sys/zfs_znode.h> | |
36 | #include <sys/fs/zfs.h> | |
37 | ||
a08ee875 LG |
38 | static int |
39 | ioctl_get_msg(char *var, int fd) | |
4c0d8e50 FN |
40 | { |
41 | int error = 0; | |
cae5b340 | 42 | char msg[ZFS_MAX_DATASET_NAME_LEN]; |
4c0d8e50 FN |
43 | |
44 | error = ioctl(fd, BLKZNAME, msg); | |
45 | if (error < 0) { | |
4c0d8e50 FN |
46 | return (error); |
47 | } | |
48 | ||
cae5b340 | 49 | snprintf(var, ZFS_MAX_DATASET_NAME_LEN, "%s", msg); |
4c0d8e50 FN |
50 | return (error); |
51 | } | |
52 | ||
a08ee875 LG |
53 | int |
54 | main(int argc, char **argv) | |
4c0d8e50 FN |
55 | { |
56 | int fd, error = 0; | |
cae5b340 | 57 | char zvol_name[ZFS_MAX_DATASET_NAME_LEN]; |
42f7b73b | 58 | char *zvol_name_part = NULL; |
4c0d8e50 FN |
59 | char *dev_name; |
60 | struct stat64 statbuf; | |
61 | int dev_minor, dev_part; | |
ea04106b | 62 | int i; |
42f7b73b | 63 | int rc; |
4c0d8e50 FN |
64 | |
65 | if (argc < 2) { | |
66 | printf("Usage: %s /dev/zvol_device_node\n", argv[0]); | |
67 | return (EINVAL); | |
68 | } | |
69 | ||
70 | dev_name = argv[1]; | |
71 | error = stat64(dev_name, &statbuf); | |
72 | if (error != 0) { | |
73 | printf("Unable to access device file: %s\n", dev_name); | |
74 | return (errno); | |
75 | } | |
76 | ||
77 | dev_minor = minor(statbuf.st_rdev); | |
78 | dev_part = dev_minor % ZVOL_MINORS; | |
79 | ||
80 | fd = open(dev_name, O_RDONLY); | |
81 | if (fd < 0) { | |
82 | printf("Unable to open device file: %s\n", dev_name); | |
83 | return (errno); | |
84 | } | |
85 | ||
a5729f7b FN |
86 | error = ioctl_get_msg(zvol_name, fd); |
87 | if (error < 0) { | |
88 | printf("ioctl_get_msg failed:%s\n", strerror(errno)); | |
89 | return (errno); | |
90 | } | |
4c0d8e50 | 91 | if (dev_part > 0) |
42f7b73b AX |
92 | rc = asprintf(&zvol_name_part, "%s-part%d", zvol_name, |
93 | dev_part); | |
4c0d8e50 | 94 | else |
42f7b73b AX |
95 | rc = asprintf(&zvol_name_part, "%s", zvol_name); |
96 | ||
97 | if (rc == -1 || zvol_name_part == NULL) | |
98 | goto error; | |
4c0d8e50 | 99 | |
ea04106b AX |
100 | for (i = 0; i < strlen(zvol_name_part); i++) { |
101 | if (isblank(zvol_name_part[i])) | |
102 | zvol_name_part[i] = '+'; | |
103 | } | |
104 | ||
4c0d8e50 | 105 | printf("%s\n", zvol_name_part); |
42f7b73b AX |
106 | free(zvol_name_part); |
107 | error: | |
4c0d8e50 FN |
108 | close(fd); |
109 | return (error); | |
110 | } |