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1 | /* | |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4 | * Copyright (C) 2001-2009 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 | * Added by Dale Stephenson | |
25 | * steph@snapserver.com | |
26 | */ | |
27 | ||
28 | #include "mdadm.h" | |
29 | #include "md_u.h" | |
30 | #include "md_p.h" | |
31 | ||
32 | int Kill(char *dev, struct supertype *st, int force, int quiet, int noexcl) | |
33 | { | |
34 | /* | |
35 | * Nothing fancy about Kill. It just zeroes out a superblock | |
36 | * Definitely not safe. | |
37 | */ | |
38 | ||
39 | int fd, rv = 0; | |
40 | ||
41 | if (force) | |
42 | noexcl = 1; | |
43 | fd = open(dev, O_RDWR|(noexcl ? 0 : O_EXCL)); | |
44 | if (fd < 0) { | |
45 | if (!quiet) | |
46 | fprintf(stderr, Name ": Couldn't open %s for write - not zeroing\n", | |
47 | dev); | |
48 | close(fd); | |
49 | return 1; | |
50 | } | |
51 | if (st == NULL) | |
52 | st = guess_super(fd); | |
53 | if (st == NULL) { | |
54 | if (!quiet) | |
55 | fprintf(stderr, Name ": Unrecognised md component device - %s\n", dev); | |
56 | close(fd); | |
57 | return 2; | |
58 | } | |
59 | rv = st->ss->load_super(st, fd, dev); | |
60 | if (force && rv >= 2) | |
61 | rv = 0; /* ignore bad data in superblock */ | |
62 | if (rv== 0 || (force && rv >= 2)) { | |
63 | st->ss->free_super(st); | |
64 | st->ss->init_super(st, NULL, 0, "", NULL, NULL); | |
65 | if (st->ss->store_super(st, fd)) { | |
66 | if (!quiet) | |
67 | fprintf(stderr, Name ": Could not zero superblock on %s\n", | |
68 | dev); | |
69 | rv = 1; | |
70 | } else if (rv) { | |
71 | if (!quiet) | |
72 | fprintf(stderr, Name ": superblock zeroed anyway\n"); | |
73 | rv = 0; | |
74 | } | |
75 | } | |
76 | close(fd); | |
77 | return rv; | |
78 | } |