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9a9dab36 NB |
1 | /* |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4 | * Copyright (C) 2001-2002 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 | * Added by Dale Stephenson | |
30 | * steph@snapserver.com | |
31 | */ | |
32 | ||
33 | #include "mdadm.h" | |
34 | #include "md_u.h" | |
35 | #include "md_p.h" | |
36 | ||
37 | int Kill(char *dev, int force) | |
38 | { | |
39 | /* | |
40 | * Nothing fancy about Kill. It just zeroes out a superblock | |
41 | * Definitely not safe. | |
42 | */ | |
43 | ||
44 | mdp_super_t super; | |
45 | int fd, rv = 0; | |
46 | ||
47 | fd = open(dev, O_RDWR); | |
48 | if (fd < 0) { | |
49 | fprintf(stderr, Name ": Couldn't open %s for write - not zeroing\n", | |
50 | dev); | |
51 | return 1; | |
52 | } | |
53 | rv = load_super(fd, &super); | |
54 | if (force && rv >= 5) | |
55 | rv = 0; /* ignore bad data in superblock */ | |
56 | switch(rv) { | |
57 | case 1: | |
58 | fprintf(stderr, Name ": cannot file device size for %s: %s\n", | |
59 | dev, strerror(errno)); | |
60 | break; | |
61 | case 2: | |
62 | fprintf(stderr, Name ": %s is too small for md.\n", dev); | |
63 | break; | |
64 | case 3: | |
65 | case 4: | |
66 | fprintf(stderr, Name ": cannot access superblock on %s.\n", dev); | |
67 | break; | |
68 | case 5: | |
69 | case 6: | |
70 | fprintf(stderr, Name ": %s does not appear to have an MD superblock.\n", dev); | |
71 | break; | |
72 | } | |
73 | if (!rv) { | |
74 | memset(&super, 0, sizeof(super)); | |
75 | if (store_super(fd, &super)) { | |
76 | fprintf(stderr, Name ": Could not zero superblock on %s\n", | |
77 | dev); | |
78 | rv = 1; | |
79 | } | |
80 | } | |
81 | close(fd); | |
82 | return rv; | |
83 | } |