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-rw-r--r--Kill.c146
1 files changed, 146 insertions, 0 deletions
diff --git a/Kill.c b/Kill.c
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+++ b/Kill.c
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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 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 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 (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 2;
+ }
+ 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, 0, "", 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);
+ 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;
+}