2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
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.
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.
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
22 * Email: <neilb@suse.de>
24 * Added by Dale Stephenson
25 * steph@snapserver.com
32 int Kill(char *dev, struct supertype *st, int force, int verbose, int noexcl)
35 * Nothing fancy about Kill. It just zeroes out a superblock
36 * Definitely not safe.
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.
47 fd = open(dev, O_RDWR|(noexcl ? 0 : O_EXCL));
50 pr_err("Couldn't open %s for write - not zeroing\n",
56 if (st == NULL || st->ss->init_super == NULL) {
58 pr_err("Unrecognised md component device - %s\n", dev);
62 st->ignore_hw_compat = 1;
63 rv = st->ss->load_super(st, fd, dev);
64 if (rv == 0 || (force && rv >= 2)) {
65 st->ss->free_super(st);
66 st->ss->init_super(st, NULL, 0, "", NULL, NULL,
68 if (st->ss->store_super(st, fd)) {
70 pr_err("Could not zero superblock on %s\n",
75 pr_err("superblock zeroed anyway\n");
83 int Kill_subarray(char *dev, char *subarray, int verbose)
85 /* Delete a subarray out of a container, the subarry must be
86 * inactive. The subarray string must be a subarray index
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
94 struct supertype supertype, *st = &supertype;
97 memset(st, 0, sizeof(*st));
99 fd = open_subarray(dev, subarray, st, verbose < 0);
103 if (!st->ss->kill_subarray) {
105 pr_err("Operation not supported for %s metadata\n",
110 if (is_subarray_active(subarray, st->devnm)) {
112 pr_err("Subarray-%s still active, aborting\n",
117 if (mdmon_running(st->devnm))
118 st->update_tail = &st->updates;
120 /* ok we've found our victim, drop the axe */
121 rv = st->ss->kill_subarray(st);
124 pr_err("Failed to delete subarray-%s from %s\n",
129 /* FIXME these routines do not report success/failure */
131 flush_metadata_updates(st);
133 st->ss->sync_metadata(st);
136 pr_err("Deleted subarray-%s from %s, UUIDs may have changed\n",
142 st->ss->free_super(st);