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Commit | Line | Data |
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9a9dab36 NB |
1 | /* |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4f589ad0 | 4 | * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de> |
9a9dab36 NB |
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 | ||
111d01fc | 37 | int Kill(char *dev, int force, int quiet, int noexcl) |
9a9dab36 NB |
38 | { |
39 | /* | |
40 | * Nothing fancy about Kill. It just zeroes out a superblock | |
41 | * Definitely not safe. | |
42 | */ | |
43 | ||
9a9dab36 | 44 | int fd, rv = 0; |
82d9eba6 | 45 | struct supertype *st; |
aba69144 | 46 | |
6416d527 | 47 | fd = open(dev, O_DIRECT | (noexcl ? O_RDWR : (O_RDWR|O_EXCL))); |
9a9dab36 | 48 | if (fd < 0) { |
6409687b NB |
49 | if (!quiet) |
50 | fprintf(stderr, Name ": Couldn't open %s for write - not zeroing\n", | |
51 | dev); | |
9860f271 | 52 | close(fd); |
9a9dab36 | 53 | return 1; |
f9ce90ba | 54 | } |
82d9eba6 NB |
55 | st = guess_super(fd); |
56 | if (st == NULL) { | |
6409687b NB |
57 | if (!quiet) |
58 | fprintf(stderr, Name ": Unrecognised md component device - %s\n", dev); | |
9860f271 | 59 | close(fd); |
f9ce90ba NB |
60 | return 1; |
61 | } | |
3da92f27 | 62 | rv = st->ss->load_super(st, fd, dev); |
4b1ac34b | 63 | if (force && rv >= 2) |
9a9dab36 | 64 | rv = 0; /* ignore bad data in superblock */ |
4b1ac34b | 65 | if (rv== 0 || (force && rv >= 2)) { |
3da92f27 | 66 | st->ss->free_super(st); |
ba7eb04f | 67 | st->ss->init_super(st, NULL, 0, "", NULL, NULL); |
3da92f27 | 68 | if (st->ss->store_super(st, fd)) { |
6409687b NB |
69 | if (!quiet) |
70 | fprintf(stderr, Name ": Could not zero superblock on %s\n", | |
71 | dev); | |
9a9dab36 | 72 | rv = 1; |
4b1ac34b | 73 | } else if (rv) { |
6409687b NB |
74 | if (!quiet) |
75 | fprintf(stderr, Name ": superblock zeroed anyway\n"); | |
4b1ac34b | 76 | rv = 0; |
9a9dab36 NB |
77 | } |
78 | } | |
79 | close(fd); | |
80 | return rv; | |
81 | } |