X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=Kill.c;h=f2fdb856c44b4a9a904063deb0d4d89fdcb4d821;hb=401f095c39b732b4247bd728cb493eb7bb692298;hp=ba99c6e529f423ff6a0d62c5fa94b73e73bc5e39;hpb=82d9eba687c952a9919f756203706285d6c42f07;p=thirdparty%2Fmdadm.git

diff --git a/Kill.c b/Kill.c
index ba99c6e5..f2fdb856 100644
--- a/Kill.c
+++ b/Kill.c
@@ -1,7 +1,7 @@
 /*
  * mdadm - manage Linux "md" devices aka RAID arrays.
  *
- * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
+ * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
  *
  *
  *    This program is free software; you can redistribute it and/or modify
@@ -19,12 +19,7 @@
  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  *
  *    Author: Neil Brown
- *    Email: <neilb@cse.unsw.edu.au>
- *    Paper: Neil Brown
- *           School of Computer Science and Engineering
- *           The University of New South Wales
- *           Sydney, 2052
- *           Australia
+ *    Email: <neilb@suse.de>
  *
  *    Added by Dale Stephenson
  *    steph@snapserver.com
@@ -34,45 +29,118 @@
 #include	"md_u.h"
 #include	"md_p.h"
 
-int Kill(char *dev, int force)
+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.
 	 */
 
-	void *super;
 	int fd, rv = 0;
-	struct supertype *st;
-		
-	fd = open(dev, O_RDWR|O_EXCL);
+
+	if (force)
+		noexcl = 1;
+	fd = open(dev, O_RDWR|(noexcl ? 0 : O_EXCL));
 	if (fd < 0) {
-		fprintf(stderr, Name ": Couldn't open %s for write - not zeroing\n",
-			dev);
-		return 1;
+		if (verbose >= 0)
+			pr_err("Couldn't open %s for write - not zeroing\n",
+				dev);
+		return 2;
 	}
-	st = guess_super(fd);
-	if (st == NULL) {
-		fprintf(stderr, Name ": Unrecognised md component device - %s\n", dev);
-		return 1;
+	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;
 	}
-	rv = st->ss->load_super(st, fd, &super, dev);
-	if (force && rv >= 2)
-		rv = 0; /* ignore bad data in superblock */
-	if (rv== 0 || (force && rv >= 2)) {
-		mdu_array_info_t info;
-		info.major_version = -1; /* zero superblock */
-		free(super);
-		st->ss->init_super(&super, &info);
-		if (st->ss->store_super(fd, super)) {
-			fprintf(stderr, Name ": Could not zero superblock on %s\n",
-				dev);
+	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) {
-			fprintf(stderr, Name ": superblock zeroed anyway\n");
+			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;
+}