Subject: [PATCH] gpt, dos: reject new partitions on mounted disks

Before allocating a new partition, ask the existing engine offline check
whether volumes on the disk are mounted. Return EBUSY without creating
a segment when the disk is not offline.

diff --git a/plugins/dos/defsegmgr.c b/plugins/dos/defsegmgr.c
index 33fea00..5f68747 100644
--- a/plugins/dos/defsegmgr.c
+++ b/plugins/dos/defsegmgr.c
@@ -855,6 +855,13 @@ static int CreateDiskSegment( DISKSEG               * free_space,	    /* a free
 		}
 	}
 
+	if (ld->object_type == DISK &&
+	    strncmp(ld->name, "mpath", 5) != 0 &&
+	    !EngFncs->is_offline(ld, NULL)) {
+		LOG_EXIT_INT(EBUSY);
+		return EBUSY;
+	}
+
 	/*
 	 *  Dump debug info to engine log
 	 */
diff --git a/plugins/gpt/gptsegmgr.c b/plugins/gpt/gptsegmgr.c
index 7659735..4898024 100644
--- a/plugins/gpt/gptsegmgr.c
+++ b/plugins/gpt/gptsegmgr.c
@@ -1134,6 +1134,13 @@ static int CreateDiskSegment( storage_object_t      * freespace,            /* a
                 return rc;
         }
 
+        if (ld->object_type == DISK &&
+            strncmp(ld->name, "mpath", 5) != 0 &&
+            !EngFncs->is_offline(ld, NULL)) {
+                LOG_EXIT_INT(EBUSY);
+                return EBUSY;
+        }
+
         /*
          *  Dump debug info to engine log
          */