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1 | /* | |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4 | * Copyright (C) 2002-2009 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@suse.de> | |
23 | */ | |
24 | ||
25 | #include "mdadm.h" | |
26 | #include "md_p.h" | |
27 | #include "md_u.h" | |
28 | ||
29 | int Query(char *dev) | |
30 | { | |
31 | /* Give a brief description of the device, | |
32 | * whether it is an md device and whether it has | |
33 | * a superblock | |
34 | */ | |
35 | int fd = open(dev, O_RDONLY); | |
36 | int vers; | |
37 | int ioctlerr; | |
38 | int superror, superrno; | |
39 | struct mdinfo info; | |
40 | mdu_array_info_t array; | |
41 | struct supertype *st = NULL; | |
42 | ||
43 | unsigned long long larray_size; | |
44 | struct stat stb; | |
45 | char *mddev; | |
46 | mdu_disk_info_t disc; | |
47 | char *activity; | |
48 | ||
49 | if (fd < 0){ | |
50 | fprintf(stderr, Name ": cannot open %s: %s\n", | |
51 | dev, strerror(errno)); | |
52 | return 1; | |
53 | } | |
54 | ||
55 | vers = md_get_version(fd); | |
56 | if (ioctl(fd, GET_ARRAY_INFO, &array)<0) | |
57 | ioctlerr = errno; | |
58 | else ioctlerr = 0; | |
59 | ||
60 | fstat(fd, &stb); | |
61 | ||
62 | if (vers>=9000 && !ioctlerr) { | |
63 | if (!get_dev_size(fd, NULL, &larray_size)) | |
64 | larray_size = 0; | |
65 | } | |
66 | ||
67 | if (vers < 0) | |
68 | printf("%s: is not an md array\n", dev); | |
69 | else if (vers < 9000) | |
70 | printf("%s: is an md device, but kernel cannot provide details\n", dev); | |
71 | else if (ioctlerr == ENODEV) | |
72 | printf("%s: is an md device which is not active\n", dev); | |
73 | else if (ioctlerr) | |
74 | printf("%s: is an md device, but gives \"%s\" when queried\n", | |
75 | dev, strerror(ioctlerr)); | |
76 | else { | |
77 | printf("%s: %s %s %d devices, %d spare%s. Use mdadm --detail for more detail.\n", | |
78 | dev, | |
79 | human_size_brief(larray_size), | |
80 | map_num(pers, array.level), | |
81 | array.raid_disks, | |
82 | array.spare_disks, array.spare_disks==1?"":"s"); | |
83 | } | |
84 | st = guess_super(fd); | |
85 | if (st) { | |
86 | superror = st->ss->load_super(st, fd, dev); | |
87 | superrno = errno; | |
88 | } else | |
89 | superror = -1; | |
90 | close(fd); | |
91 | if (superror == 0) { | |
92 | /* array might be active... */ | |
93 | st->ss->getinfo_super(st, &info); | |
94 | if (st->ss == &super0) { | |
95 | mddev = get_md_name(info.array.md_minor); | |
96 | disc.number = info.disk.number; | |
97 | activity = "undetected"; | |
98 | if (mddev && (fd = open(mddev, O_RDONLY))>=0) { | |
99 | if (md_get_version(fd) >= 9000 && | |
100 | ioctl(fd, GET_ARRAY_INFO, &array)>= 0) { | |
101 | if (ioctl(fd, GET_DISK_INFO, &disc) >= 0 && | |
102 | makedev((unsigned)disc.major,(unsigned)disc.minor) == stb.st_rdev) | |
103 | activity = "active"; | |
104 | else | |
105 | activity = "mismatch"; | |
106 | } | |
107 | close(fd); | |
108 | } | |
109 | } else { | |
110 | activity = "unknown"; | |
111 | mddev = "array"; | |
112 | } | |
113 | printf("%s: device %d in %d device %s %s %s. Use mdadm --examine for more detail.\n", | |
114 | dev, | |
115 | info.disk.number, info.array.raid_disks, | |
116 | activity, | |
117 | map_num(pers, info.array.level), | |
118 | mddev); | |
119 | if (st->ss == &super0) | |
120 | put_md_name(mddev); | |
121 | } | |
122 | return 0; | |
123 | } | |
124 |