1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
* Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Neil Brown
* Email: <neilb@suse.de>
*
* Added by Dale Stephenson
* steph@snapserver.com
*/
#include "mdadm.h"
#include "md_u.h"
#include "md_p.h"
int Kill(char *dev, struct supertype *st, int force, int verbose, int noexcl)
{
/*
* Nothing fancy about Kill. It just zeroes out a superblock
* Definitely not safe.
* Returns:
* 0 - a zero superblock was successfully written out
* 1 - failed to write the zero superblock
* 2 - failed to open the device.
* 4 - failed to find a superblock.
*/
int fd, rv = 0;
if (force)
noexcl = 1;
fd = open(dev, O_RDWR|(noexcl ? 0 : O_EXCL));
if (fd < 0) {
if (verbose >= 0)
pr_err("Couldn't open %s for write - not zeroing\n",
dev);
return 2;
}
if (st == NULL)
st = guess_super(fd);
if (st == NULL || st->ss->init_super == NULL) {
if (verbose >= 0)
pr_err("Unrecognised md component device - %s\n", dev);
close(fd);
return 4;
}
st->ignore_hw_compat = 1;
rv = st->ss->load_super(st, fd, dev);
if (rv == 0 || (force && rv >= 2)) {
st->ss->free_super(st);
st->ss->init_super(st, NULL, NULL, "", NULL, NULL,
INVALID_SECTORS);
if (st->ss->store_super(st, fd)) {
if (verbose >= 0)
pr_err("Could not zero superblock on %s\n",
dev);
rv = 1;
} else if (rv) {
if (verbose >= 0)
pr_err("superblock zeroed anyway\n");
rv = 0;
}
}
close(fd);
return rv;
}
int Kill_subarray(char *dev, char *subarray, int verbose)
{
/* Delete a subarray out of a container, the subarry must be
* inactive. The subarray string must be a subarray index
* number.
*
* 0 = successfully deleted subarray from all container members
* 1 = failed to sync metadata to one or more devices
* 2 = failed to find the container, subarray, or other resource
* issue
*/
struct supertype supertype, *st = &supertype;
int fd, rv = 2;
memset(st, 0, sizeof(*st));
fd = open_subarray(dev, subarray, st, verbose < 0);
if (fd < 0)
return 2;
if (!st->ss->kill_subarray) {
if (verbose >= 0)
pr_err("Operation not supported for %s metadata\n",
st->ss->name);
goto free_super;
}
if (is_subarray_active(subarray, st->devnm)) {
if (verbose >= 0)
pr_err("Subarray-%s still active, aborting\n",
subarray);
goto free_super;
}
if (mdmon_running(st->devnm))
st->update_tail = &st->updates;
/* ok we've found our victim, drop the axe */
rv = st->ss->kill_subarray(st, subarray);
if (rv) {
if (verbose >= 0)
pr_err("Failed to delete subarray-%s from %s\n",
subarray, dev);
goto free_super;
}
/* FIXME these routines do not report success/failure */
if (st->update_tail)
flush_metadata_updates(st);
else
st->ss->sync_metadata(st);
if (verbose >= 0)
pr_err("Deleted subarray-%s from %s, UUIDs may have changed\n",
subarray, dev);
rv = 0;
free_super:
st->ss->free_super(st);
close(fd);
return rv;
}
|
