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/*
* 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 quiet, 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 or find a superblock.
*/
int fd, rv = 0;
if (force)
noexcl = 1;
fd = open(dev, O_RDWR|(noexcl ? 0 : O_EXCL));
if (fd < 0) {
if (!quiet)
fprintf(stderr, Name ": Couldn't open %s for write - not zeroing\n",
dev);
return 2;
}
if (st == NULL)
st = guess_super(fd);
if (st == NULL) {
if (!quiet)
fprintf(stderr, Name ": Unrecognised md component device - %s\n", dev);
close(fd);
return 2;
}
rv = st->ss->load_super(st, fd, dev);
if (force && rv >= 2)
rv = 0; /* ignore bad data in superblock */
if (rv== 0 || (force && rv >= 2)) {
st->ss->free_super(st);
st->ss->init_super(st, NULL, 0, "", NULL, NULL);
if (st->ss->store_super(st, fd)) {
if (!quiet)
fprintf(stderr, Name ": Could not zero superblock on %s\n",
dev);
rv = 1;
} else if (rv) {
if (!quiet)
fprintf(stderr, Name ": superblock zeroed anyway\n");
rv = 0;
}
}
close(fd);
return rv;
}
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