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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 | ||
ba728be7 | 32 | int Kill(char *dev, struct supertype *st, int force, int verbose, 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) { |
ba728be7 | 49 | if (verbose >= 0) |
e7b84f9d | 50 | pr_err("Couldn't open %s for write - not zeroing\n", |
6409687b | 51 | dev); |
4c619b29 | 52 | return 2; |
f9ce90ba | 53 | } |
9277cc77 N |
54 | if (st == NULL) |
55 | st = guess_super(fd); | |
0f22b998 | 56 | if (st == NULL || st->ss->init_super == NULL) { |
ba728be7 | 57 | if (verbose >= 0) |
e7b84f9d | 58 | pr_err("Unrecognised md component device - %s\n", dev); |
9860f271 | 59 | close(fd); |
9277cc77 | 60 | return 2; |
f9ce90ba | 61 | } |
4a96d9ff | 62 | st->ignore_hw_compat = 1; |
3da92f27 | 63 | rv = st->ss->load_super(st, fd, dev); |
88657e86 | 64 | if (rv == 0 || (force && rv >= 2)) { |
3da92f27 | 65 | st->ss->free_super(st); |
83cd1e97 N |
66 | st->ss->init_super(st, NULL, 0, "", NULL, NULL, |
67 | INVALID_SECTORS); | |
3da92f27 | 68 | if (st->ss->store_super(st, fd)) { |
ba728be7 | 69 | if (verbose >= 0) |
e7b84f9d | 70 | pr_err("Could not zero superblock on %s\n", |
6409687b | 71 | dev); |
9a9dab36 | 72 | rv = 1; |
4b1ac34b | 73 | } else if (rv) { |
ba728be7 | 74 | if (verbose >= 0) |
e7b84f9d | 75 | pr_err("superblock zeroed anyway\n"); |
4b1ac34b | 76 | rv = 0; |
9a9dab36 NB |
77 | } |
78 | } | |
79 | close(fd); | |
80 | return rv; | |
81 | } | |
33414a01 | 82 | |
ba728be7 | 83 | int Kill_subarray(char *dev, char *subarray, int verbose) |
33414a01 DW |
84 | { |
85 | /* Delete a subarray out of a container, the subarry must be | |
86 | * inactive. The subarray string must be a subarray index | |
87 | * number. | |
88 | * | |
89 | * 0 = successfully deleted subarray from all container members | |
90 | * 1 = failed to sync metadata to one or more devices | |
91 | * 2 = failed to find the container, subarray, or other resource | |
92 | * issue | |
93 | */ | |
94 | struct supertype supertype, *st = &supertype; | |
95 | int fd, rv = 2; | |
96 | ||
97 | memset(st, 0, sizeof(*st)); | |
98 | ||
ba728be7 | 99 | fd = open_subarray(dev, subarray, st, verbose < 0); |
33414a01 DW |
100 | if (fd < 0) |
101 | return 2; | |
102 | ||
103 | if (!st->ss->kill_subarray) { | |
ba728be7 | 104 | if (verbose >= 0) |
e7b84f9d N |
105 | pr_err("Operation not supported for %s metadata\n", |
106 | st->ss->name); | |
33414a01 DW |
107 | goto free_super; |
108 | } | |
109 | ||
4dd2df09 | 110 | if (is_subarray_active(subarray, st->devnm)) { |
ba728be7 | 111 | if (verbose >= 0) |
e7b84f9d N |
112 | pr_err("Subarray-%s still active, aborting\n", |
113 | subarray); | |
33414a01 DW |
114 | goto free_super; |
115 | } | |
116 | ||
4dd2df09 | 117 | if (mdmon_running(st->devnm)) |
33414a01 DW |
118 | st->update_tail = &st->updates; |
119 | ||
120 | /* ok we've found our victim, drop the axe */ | |
121 | rv = st->ss->kill_subarray(st); | |
122 | if (rv) { | |
ba728be7 | 123 | if (verbose >= 0) |
e7b84f9d N |
124 | pr_err("Failed to delete subarray-%s from %s\n", |
125 | subarray, dev); | |
33414a01 DW |
126 | goto free_super; |
127 | } | |
128 | ||
129 | /* FIXME these routines do not report success/failure */ | |
130 | if (st->update_tail) | |
131 | flush_metadata_updates(st); | |
132 | else | |
133 | st->ss->sync_metadata(st); | |
134 | ||
ba728be7 | 135 | if (verbose >= 0) |
e7b84f9d N |
136 | pr_err("Deleted subarray-%s from %s, UUIDs may have changed\n", |
137 | subarray, dev); | |
33414a01 DW |
138 | |
139 | rv = 0; | |
140 | ||
141 | free_super: | |
142 | st->ss->free_super(st); | |
143 | close(fd); | |
144 | ||
145 | return rv; | |
146 | } |