Adding upstream version 4.2.upstream/4.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 147 insertions, 0 deletions

diff --git a/Kill.c b/Kill.c
new file mode 100644
index 0000000..bfd0efd
--- /dev/null
+++ b/Kill.c
@@ -0,0 +1,147 @@
+/*
+ * 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;
+}