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Commit | Line | Data |
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9a9dab36 NB |
1 | /* |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
e736b623 | 4 | * Copyright (C) 2001-2009 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 | |
e736b623 | 22 | * Email: <neilb@suse.de> |
9a9dab36 NB |
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 | ||
9277cc77 | 32 | int Kill(char *dev, struct supertype *st, int force, int quiet, int noexcl) |
9a9dab36 NB |
33 | { |
34 | /* | |
35 | * Nothing fancy about Kill. It just zeroes out a superblock | |
36 | * Definitely not safe. | |
4c619b29 AW |
37 | * Returns: |
38 | * 0 - a zero superblock was successfully written out | |
39 | * 1 - failed to write the zero superblock | |
40 | * 2 - failed to open the device or find a superblock. | |
9a9dab36 NB |
41 | */ |
42 | ||
9a9dab36 | 43 | int fd, rv = 0; |
aba69144 | 44 | |
8a659c33 N |
45 | if (force) |
46 | noexcl = 1; | |
9277cc77 | 47 | fd = open(dev, O_RDWR|(noexcl ? 0 : 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); | |
4c619b29 | 52 | return 2; |
f9ce90ba | 53 | } |
9277cc77 N |
54 | if (st == NULL) |
55 | st = guess_super(fd); | |
82d9eba6 | 56 | if (st == NULL) { |
6409687b NB |
57 | if (!quiet) |
58 | fprintf(stderr, Name ": Unrecognised md component device - %s\n", dev); | |
9860f271 | 59 | close(fd); |
9277cc77 | 60 | return 2; |
f9ce90ba | 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 | } |