X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=bitmap.c;h=59410d543e67c41285391a568e679711d88a5a22;hb=067db4dfcd6830e076a759ec2cdcbf2c6566be6e;hp=75492f759fe0c2ad2c8ee7464b556ed2163dc8ae;hpb=1bfdbe01ff300ebbf92d68c15722d2ba861aac3b;p=thirdparty%2Fmdadm.git

diff --git a/bitmap.c b/bitmap.c
index 75492f75..59410d54 100644
--- a/bitmap.c
+++ b/bitmap.c
@@ -398,3 +398,23 @@ out:
 		unlink(filename); /* possibly corrupted, better get rid of it */
 	return rv;
 }
+
+int bitmap_update_uuid(int fd, int *uuid)
+{
+	struct bitmap_super_s bm;
+	if (lseek(fd, 0, 0) != 0)
+		return 1;
+	if (read(fd, &bm, sizeof(bm)) != sizeof(bm))
+		return 1;
+	if (bm.magic != __cpu_to_le32(BITMAP_MAGIC))
+		return 1;
+	memcpy(bm.uuid, uuid, 16);
+	if (lseek(fd, 0, 0) != 0)
+		return 2;
+	if (write(fd, &bm, sizeof(bm)) != sizeof(bm)) {
+		lseek(fd, 0, 0);
+		return 2;
+	}
+	lseek(fd, 0, 0);
+	return 0;
+}