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1 | /* | |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4 | * Copyright (C) 2002-2006 Neil Brown <neilb@suse.de> | |
5 | * | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * Author: Neil Brown | |
22 | * Email: <neilb@cse.unsw.edu.au> | |
23 | * Paper: Neil Brown | |
24 | * School of Computer Science and Engineering | |
25 | * The University of New South Wales | |
26 | * Sydney, 2052 | |
27 | * Australia | |
28 | */ | |
29 | ||
30 | #include "mdadm.h" | |
31 | #include "md_p.h" | |
32 | #include "md_u.h" | |
33 | ||
34 | int Query(char *dev) | |
35 | { | |
36 | /* Give a brief description of the device, | |
37 | * whether it is an md device and whether it has | |
38 | * a superblock | |
39 | */ | |
40 | int fd = open(dev, O_RDONLY, 0); | |
41 | int vers; | |
42 | int ioctlerr; | |
43 | int superror, superrno; | |
44 | struct mdinfo info; | |
45 | mdu_array_info_t array; | |
46 | struct supertype *st = NULL; | |
47 | ||
48 | unsigned long long larray_size; | |
49 | struct stat stb; | |
50 | char *mddev; | |
51 | mdu_disk_info_t disc; | |
52 | char *activity; | |
53 | ||
54 | if (fd < 0){ | |
55 | fprintf(stderr, Name ": cannot open %s: %s\n", | |
56 | dev, strerror(errno)); | |
57 | return 1; | |
58 | } | |
59 | ||
60 | vers = md_get_version(fd); | |
61 | if (ioctl(fd, GET_ARRAY_INFO, &array)<0) | |
62 | ioctlerr = errno; | |
63 | else ioctlerr = 0; | |
64 | ||
65 | fstat(fd, &stb); | |
66 | ||
67 | if (vers>=9000 && !ioctlerr) { | |
68 | if (!get_dev_size(fd, NULL, &larray_size)) | |
69 | larray_size = 0; | |
70 | } | |
71 | ||
72 | if (vers < 0) | |
73 | printf("%s: is not an md array\n", dev); | |
74 | else if (vers < 9000) | |
75 | printf("%s: is an md device, but kernel cannot provide details\n", dev); | |
76 | else if (ioctlerr == ENODEV) | |
77 | printf("%s: is an md device which is not active\n", dev); | |
78 | else if (ioctlerr) | |
79 | printf("%s: is an md device, but gives \"%s\" when queried\n", | |
80 | dev, strerror(ioctlerr)); | |
81 | else { | |
82 | printf("%s: %s %s %d devices, %d spare%s. Use mdadm --detail for more detail.\n", | |
83 | dev, | |
84 | human_size_brief(larray_size), | |
85 | map_num(pers, array.level), | |
86 | array.raid_disks, | |
87 | array.spare_disks, array.spare_disks==1?"":"s"); | |
88 | } | |
89 | st = guess_super(fd); | |
90 | if (st) { | |
91 | superror = st->ss->load_super(st, fd, dev); | |
92 | superrno = errno; | |
93 | } else | |
94 | superror = -1; | |
95 | close(fd); | |
96 | if (superror == 0) { | |
97 | /* array might be active... */ | |
98 | st->ss->getinfo_super(st, &info); | |
99 | if (st->ss == &super0) { | |
100 | mddev = get_md_name(info.array.md_minor); | |
101 | disc.number = info.disk.number; | |
102 | activity = "undetected"; | |
103 | if (mddev && (fd = open(mddev, O_RDONLY))>=0) { | |
104 | if (md_get_version(fd) >= 9000 && | |
105 | ioctl(fd, GET_ARRAY_INFO, &array)>= 0) { | |
106 | if (ioctl(fd, GET_DISK_INFO, &disc) >= 0 && | |
107 | makedev((unsigned)disc.major,(unsigned)disc.minor) == stb.st_rdev) | |
108 | activity = "active"; | |
109 | else | |
110 | activity = "mismatch"; | |
111 | } | |
112 | close(fd); | |
113 | } | |
114 | } else { | |
115 | activity = "unknown"; | |
116 | mddev = "array"; | |
117 | } | |
118 | printf("%s: device %d in %d device %s %s %s. Use mdadm --examine for more detail.\n", | |
119 | dev, | |
120 | info.disk.number, info.array.raid_disks, | |
121 | activity, | |
122 | map_num(pers, info.array.level), | |
123 | mddev); | |
124 | if (st->ss == &super0) | |
125 | put_md_name(mddev); | |
126 | } | |
127 | return 0; | |
128 | } | |
129 |