Add path selector args.
--- diff/drivers/md/dm-mpath.c	2005-01-12 19:17:12.000000000 +0000
+++ source/drivers/md/dm-mpath.c	2005-01-12 19:17:32.000000000 +0000
@@ -457,6 +457,40 @@
 	as->argv += n;
 }
 
+static int parse_path_selector(struct arg_set *as, struct priority_group *pg,
+			       struct dm_target *ti)
+{
+	int r;
+	struct path_selector_type *pst;
+	unsigned ps_argc;
+
+	static struct param _params[] = {
+		{0, 1024, ESTR("invalid number of path selector args")},
+	};
+
+	pst = dm_get_path_selector(shift(as));
+	if (!pst) {
+		ti->error = ESTR("unknown path selector type");
+		return -EINVAL;
+	}
+
+	r = read_param(_params, shift(as), &ps_argc, &ti->error);
+	if (r)
+		return -EINVAL;
+
+	r = pst->ctr(&pg->ps, ps_argc, as->argv);
+	if (r) {
+		dm_put_path_selector(pst);
+		ti->error = ESTR("path selector constructor failed");
+		return r;
+	}
+
+	pg->ps.type = pst;
+	consume(as, ps_argc);
+
+	return 0;
+}
+
 static struct pgpath *parse_path(struct arg_set *as, struct path_selector *ps,
 			       struct dm_target *ti)
 {
@@ -505,7 +539,6 @@
 	int r;
 	unsigned i, nr_selector_args, nr_params;
 	struct priority_group *pg;
-	struct path_selector_type *pst;
 
 	if (as->argc < 2) {
 		as->argc = 0;
@@ -520,20 +553,9 @@
 	}
 	pg->m = m;
 
-	pst = dm_get_path_selector(shift(as));
-	if (!pst) {
-		ti->error = ESTR("unknown path selector type");
-		goto bad;
-	}
-
-	/* FIXME Read path selector arguments & pass them to ctr */
-
-	r = pst->ctr(&pg->ps);
-	if (r) {
-		dm_put_path_selector(pst);
+	r = parse_path_selector(as, pg, ti);
+	if (r)
 		goto bad;
-	}
-	pg->ps.type = pst;
 
 	/*
 	 * read the paths
--- diff/drivers/md/dm-path-selector.h	2005-01-12 19:17:12.000000000 +0000
+++ source/drivers/md/dm-path-selector.h	2005-01-12 19:17:32.000000000 +0000
@@ -29,7 +29,7 @@
 /*
  * Constructs a path selector object, takes custom arguments
  */
-typedef int (*ps_ctr_fn) (struct path_selector *ps);
+typedef int (*ps_ctr_fn) (struct path_selector *ps, unsigned argc, char **argv);
 typedef void (*ps_dtr_fn) (struct path_selector *ps);
 
 /*
--- diff/drivers/md/dm-round-robin.c	2005-01-12 19:17:20.000000000 +0000
+++ source/drivers/md/dm-round-robin.c	2005-01-12 19:17:32.000000000 +0000
@@ -59,7 +59,7 @@
 	return s;
 }
 
-static int rr_ctr(struct path_selector *ps)
+static int rr_ctr(struct path_selector *ps, unsigned argc, char **argv)
 {
 	struct selector *s;