mdmon: allow incremental assembly of containers.

[thirdparty/mdadm.git] / managemon.c

diff --git a/managemon.c b/managemon.c
index 5f0a61b5ce106f56d44404ae08b7347f29a1a36f..e02c77ea964ef8fa6746ec05f06dc3835f312eb2 100644 (file)
--- a/managemon.c
+++ b/managemon.c
@@ -241,7 +241,9 @@ static void add_disk_to_container(struct supertype *st, struct mdinfo *sd)
 {
        int dfd;
        char nm[20];
+       struct supertype *st2;
        struct metadata_update *update = NULL;
+       struct mdinfo info;
        mdu_disk_info_t dk = {
                .number = -1,
                .major = sd->disk.major,
@@ -261,6 +263,25 @@ static void add_disk_to_container(struct supertype *st, struct mdinfo *sd)
        if (dfd < 0)
                return;
 
+       /* Check the metadata and see if it is already part of this
+        * array
+        */
+       st2 = dup_super(st);
+       if (st2->ss->load_super(st2, dfd, NULL) == 0) {
+               st2->ss->getinfo_super(st, &info);
+               if (st->ss->compare_super(st, st2) == 0 &&
+                   info.disk.raid_disk >= 0) {
+                       /* Looks like a good member of array.
+                        * Just accept it.
+                        * mdadm will incorporate any parts into
+                        * active arrays.
+                        */
+                       st2->ss->free_super(st2);
+                       return;
+               }
+       }
+       st2->ss->free_super(st2);
+
        st->update_tail = &update;
        st->ss->add_to_super(st, &dk, dfd, NULL);
        st->ss->write_init_super(st);