Kill old superblocks on create.

Make sure old-version superblocks are not around to confuse anything
when a new array is created.

Signed-off-by: Neil Brown <neilb@suse.de>

4 files changed, 15 insertions, 9 deletions

diff --git a/Create.c b/Create.c
index 71bab18..df6d850 100644
--- a/Create.c
+++ b/Create.c
@@ -502,6 +502,8 @@ int Create(struct supertype *st, char *mddev, int mdfd,
 				break;
 			case 2:
 				if (disk.state == 1) break;
+				Kill(dv->devname, 0, 1); /* Just be sure it is clean */
+				Kill(dv->devname, 0, 1); /* and again, there could be two superblocks */
 				st->ss->write_init_super(st, super, &disk, dv->devname);
 
 				if (ioctl(mdfd, ADD_NEW_DISK, &disk)) {
diff --git a/Kill.c b/Kill.c
index 95ab15c..2f28b99 100644
--- a/Kill.c
+++ b/Kill.c
@@ -34,7 +34,7 @@
 #include	"md_u.h"
 #include	"md_p.h"
 
-int Kill(char *dev, int force)
+int Kill(char *dev, int force, int quiet)
 {
 	/*
 	 * Nothing fancy about Kill.  It just zeroes out a superblock
@@ -47,13 +47,15 @@ int Kill(char *dev, int force)
 		
 	fd = open(dev, O_RDWR|O_EXCL);
 	if (fd < 0) {
-		fprintf(stderr, Name ": Couldn't open %s for write - not zeroing\n",
-			dev);
+		if (!quiet)
+			fprintf(stderr, Name ": Couldn't open %s for write - not zeroing\n",
+				dev);
 		return 1;
 	}
 	st = guess_super(fd);
 	if (st == NULL) {
-		fprintf(stderr, Name ": Unrecognised md component device - %s\n", dev);
+		if (!quiet)
+			fprintf(stderr, Name ": Unrecognised md component device - %s\n", dev);
 		return 1;
 	}
 	rv = st->ss->load_super(st, fd, &super, dev);
@@ -65,11 +67,13 @@ int Kill(char *dev, int force)
 		free(super);
 		st->ss->init_super(st, &super, &info, 0, "");
 		if (st->ss->store_super(st, fd, super)) {
-			fprintf(stderr, Name ": Could not zero superblock on %s\n",
-				dev);
+			if (!quiet)
+				fprintf(stderr, Name ": Could not zero superblock on %s\n",
+					dev);
 			rv = 1;
 		} else if (rv) {
-			fprintf(stderr, Name ": superblock zeroed anyway\n");
+			if (!quiet)
+				fprintf(stderr, Name ": superblock zeroed anyway\n");
 			rv = 0;
 		}
 	}
diff --git a/mdadm.c b/mdadm.c
index b32158e..6a5fac3 100644
--- a/mdadm.c
+++ b/mdadm.c
@@ -1124,7 +1124,7 @@ int main(int argc, char *argv[])
 				case 'D':
 					rv |= Detail(dv->devname, brief?1+verbose:0, test); continue;
 				case 'K': /* Zero superblock */
-					rv |= Kill(dv->devname, force); continue;
+					rv |= Kill(dv->devname, force, quiet); continue;
 				case 'Q':
 					rv |= Query(dv->devname); continue;
 				case 'X':
diff --git a/mdadm.h b/mdadm.h
index a9ae698..b16c75a 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -346,7 +346,7 @@ extern int Monitor(mddev_dev_t devlist,
 		   int period, int daemonise, int scan, int oneshot,
 		   int dosyslog, char *config, int test, char *pidfile);
 
-extern int Kill(char *dev, int force);
+extern int Kill(char *dev, int force, int quiet);
 
 extern int CreateBitmap(char *filename, int force, char uuid[16],
 			unsigned long chunksize, unsigned long daemon_sleep,