[dm-devel] dm-multipath [PATCH] multipathd adding devices.

[Benjamin Marzinski <bmarzins redhat com>]

The way multipathd currently works, if you add a map that isn't known to
device mapper from multipathd, the first time you run the command, it won't
add the map to the mpvec vector.  With the attached patch, multipathd will
initialize the map and add it to the mpvec vector.

-Ben

diff -urpN mp-devel-clean/multipathd/main.c mp-devel-patched/multipathd/main.c
--- mp-devel-clean/multipathd/main.c	2006-02-23 17:33:58.000000000 -0600
+++ mp-devel-patched/multipathd/main.c	2006-02-24 21:16:17.000000000 -0600
@@ -550,6 +550,7 @@ ev_add_map (char * devname, struct vecto
 	char * alias;
 	char * refwwid;
 	struct multipath * mpp;
+	vector mpvec;
 	int map_present;
 	int r = 1;
 
@@ -597,10 +598,33 @@ ev_add_map (char * devname, struct vecto
 	refwwid = get_refwwid(devname, DEV_DEVMAP, vecs->pathvec);
 
 	if (refwwid) {
-		r = coalesce_paths(vecs, NULL, refwwid);
+		int i;
+		if (!(mpvec = vector_alloc()))
+			goto out;
+		r = coalesce_paths(vecs, mpvec, refwwid);
 		dm_lib_release();
+		if (r)
+			goto out_free;
+		r = 1;
+		vector_foreach_slot(mpvec, mpp, i){
+			if (!vector_alloc_slot(vecs->mpvec)) {
+				orphan_paths(vecs->pathvec, mpp);
+				free_multipath(mpp, KEEP_PATHS);
+				goto out_free;
+			}
+			vector_set_slot(vecs->mpvec, mpp);
+			sync_map_state(mpp);
+			if (setup_multipath(vecs, mpp))
+				goto out_free;
+			if (start_waiter_thread(mpp, vecs))
+				goto out_free;
+			r = 0;
+		}
 	}
 	
+out_free:
+	vector_free(mpvec);
+out:
 	if (!r)
 		condlog(3, "%s: devmap %s added", alias, devname);
 	else