Add parameter to flakey target to either start up or down - this allows
one target to turn on when the other turns off.
--- diff/drivers/md/dm-flakey.c	2004-01-22 13:40:25.000000000 -0600
+++ source/drivers/md/dm-flakey.c	2004-02-03 09:07:52.617127312 -0600
@@ -22,16 +22,17 @@
 	sector_t start;
 	unsigned up_interval;
 	unsigned down_interval;
+        unsigned start_up;
 };
 
 /*
- * Construct a flakey mapping: <dev_path> <offset> <up interval> <down interval>
+ * Construct a flakey mapping: <dev_path> <offset> <up interval> <down interval>   <start up>
  */
 static int flakey_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 {
 	struct flakey *f;
 
-	if (argc != 4) {
+	if (argc != 5) {
 		ti->error = "dm-flakey: Invalid argument count";
 		return -EINVAL;
 	}
@@ -58,6 +59,11 @@
 		goto bad;
 	}
 
+        if (sscanf(argv[4], "%u", &f->start_up) != 1) {
+                ti->error = "dm-flakey: invalid start_up parameter";
+                goto bad;
+        }
+
 	if (dm_get_device(ti, argv[0], f->start, ti->len,
 			  dm_table_get_mode(ti->table), &f->dev)) {
 		ti->error = "dm-flakey: Device lookup failed";
@@ -89,7 +95,9 @@
 	/* are we alive ? */
 	elapsed = (jiffies - f->start_time) / HZ;
 	elapsed %= (f->up_interval + f->down_interval);
-	if (elapsed >= f->up_interval)
+        /* Use start_up param to determine which side of elapsed to check */
+	if ((f->start_up && (elapsed >= f->up_interval)) ||
+            (!f->start_up && (elapsed < f->up_interval)))
 		return -EIO;
 
 	else {