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e0d19036 NB |
1 | /* |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4 | * Copyright (C) 2002 Neil Brown <neilb@cse.unsw.edu.au> | |
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 | mdp_super_t super; | |
45 | mdu_array_info_t array; | |
46 | unsigned long long larray_size; | |
47 | unsigned long array_size; | |
48 | struct stat stb; | |
49 | char *mddev; | |
50 | mdu_disk_info_t disc; | |
51 | char *activity; | |
52 | ||
53 | if (fd < 0){ | |
54 | fprintf(stderr, Name ": cannot open %s: %s\n", | |
55 | dev, strerror(errno)); | |
56 | return 1; | |
57 | } | |
58 | ||
59 | vers = md_get_version(fd); | |
60 | if (ioctl(fd, GET_ARRAY_INFO, &array)<0) | |
61 | ioctlerr = errno; | |
62 | else ioctlerr = 0; | |
63 | superror = load_super(fd, &super); | |
64 | superrno = errno; | |
65 | ||
66 | fstat(fd, &stb); | |
67 | ||
68 | if (vers>=9000 && !ioctlerr) { | |
69 | #ifdef BLKGETSIZE64 | |
70 | if (ioctl(fd, BLKGETSIZE64, &larray_size)==0) | |
71 | ; | |
72 | else | |
73 | #endif | |
74 | if (ioctl(fd, BLKGETSIZE, &array_size)==0) | |
75 | larray_size = array_size<<9; | |
76 | else larray_size = 0; | |
77 | } | |
78 | close(fd); | |
79 | ||
80 | if (vers < 0) | |
81 | printf("%s: is not an md array\n", dev); | |
82 | else if (vers < 9000) | |
83 | printf("%s: is an md device, but kernel cannot provide details\n", dev); | |
84 | else if (ioctlerr == ENODEV) | |
85 | printf("%s: is an md device which is not active\n", dev); | |
86 | else if (ioctlerr) | |
87 | printf("%s: is an md device, but gives \"%s\" when queried\n", | |
88 | dev, strerror(ioctlerr)); | |
89 | else { | |
90 | printf("%s: %s %s %d devices, %d spare%s. Use mdadm --detail for more detail.\n", | |
91 | dev, | |
92 | human_size_brief(larray_size), | |
93 | map_num(pers, array.level), | |
94 | array.raid_disks, | |
95 | array.spare_disks, array.spare_disks==1?"":"s"); | |
96 | } | |
97 | switch(superror) { | |
98 | case 1: | |
99 | printf("%s: cannot find device size: %s\n", | |
100 | dev, strerror(superrno)); | |
101 | break; | |
102 | case 2: | |
103 | printf("%s: is too small to be an md componenet.\n", | |
104 | dev); | |
105 | break; | |
106 | case 3: | |
107 | printf("%s: Cannot seek to superblock: %s\n", | |
108 | dev, strerror(superrno)); | |
109 | break; | |
110 | case 4: | |
111 | printf("%s: Cannot read md superblock.\n", | |
112 | dev); | |
113 | break; | |
114 | case 5: | |
115 | printf("%s: No md super block found, not an md component.\n", | |
116 | dev); | |
117 | break; | |
118 | case 6: | |
119 | printf("%s: md superblock present with wrong version: %d\n", | |
120 | dev, super.major_version); | |
121 | break; | |
122 | default: | |
123 | /* array might be active... */ | |
124 | mddev = get_md_name(super.md_minor); | |
125 | disc.number = super.this_disk.number; | |
126 | activity = "inactive"; | |
127 | if (mddev && (fd = open(mddev, O_RDONLY))>=0) { | |
128 | if (md_get_version(fd) >= 9000 && | |
129 | ioctl(fd, GET_ARRAY_INFO, &array)>= 0) { | |
130 | if (ioctl(fd, GET_DISK_INFO, &disc) >= 0 && | |
131 | MKDEV(disc.major,disc.minor) == stb.st_rdev) | |
132 | activity = "active"; | |
133 | else | |
134 | activity = "mismatch"; | |
135 | } | |
136 | close(fd); | |
137 | } | |
138 | printf("%s: device %d in %d device %s %s md%d. Use mdadm --examine for more detail.\n", | |
139 | dev, | |
140 | super.this_disk.number, super.raid_disks, | |
141 | activity, | |
142 | map_num(pers, super.level), | |
143 | super.md_minor); | |
144 | break; | |
145 | } | |
146 | return 0; | |
147 | } | |
148 | ||
149 |