Start on --assemble support for DDF

[thirdparty/mdadm.git] / super-ddf.c

diff --git a/super-ddf.c b/super-ddf.c
index 457470d7d90bb86993d919db0e2ab57314a5ab34..b0ed739489bbd173753b4dd3856744ed9f3a7fd5 100644 (file)
--- a/super-ddf.c
+++ b/super-ddf.c
@@ -1149,6 +1149,7 @@ static void uuid_from_super_ddf(struct supertype *st, int uuid[4])
 static void getinfo_super_ddf(struct supertype *st, struct mdinfo *info)
 {
        struct ddf_super *ddf = st->sb;
+       int i;
 
        info->array.major_version = 1000;
        info->array.minor_version = 0; /* FIXME use ddf->revision somehow */
@@ -1167,9 +1168,17 @@ static void getinfo_super_ddf(struct supertype *st, struct mdinfo *info)
 
        info->disk.major = 0;
        info->disk.minor = 0;
-//     info->disk.number = __be32_to_cpu(ddf->disk.refnum);
+       info->disk.number = __be32_to_cpu(ddf->dlist->disk.refnum);
 //     info->disk.raid_disk = find refnum in the table and use index;
-//     info->disk.state = ???;
+       info->disk.raid_disk = -1;
+       for (i = 0; i < __be16_to_cpu(ddf->phys->max_pdes) ; i++)
+               if (ddf->phys->entries[i].refnum == ddf->dlist->disk.refnum) {
+                       info->disk.raid_disk = i;
+                       break;
+               }
+       info->disk.state = (1 << MD_DISK_SYNC);
+
+       info->reshape_active = 0;
 
 //     uuid_from_super_ddf(info->uuid, sbv);
 
@@ -2248,6 +2257,31 @@ static int store_zero_ddf(struct supertype *st, int fd)
        return 0;
 }
 
+static int compare_super_ddf(struct supertype *st, struct supertype *tst)
+{
+       /*
+        * return:
+        *  0 same, or first was empty, and second was copied
+        *  1 second had wrong number
+        *  2 wrong uuid
+        *  3 wrong other info
+        */
+       struct ddf_super *first = st->sb;
+       struct ddf_super *second = tst->sb;
+
+       if (!first) {
+               st->sb = tst->sb;
+               tst->sb = NULL;
+               return 0;
+       }
+
+       if (memcmp(first->anchor.guid, second->anchor.guid, DDF_GUID_LEN) != 0)
+               return 2;
+
+       /* FIXME should I look at anything else? */
+       return 0;
+}
+
 struct superswitch super_ddf = {
 #ifndef        MDASSEMBLE
        .examine_super  = examine_super_ddf,
@@ -2263,6 +2297,8 @@ struct superswitch super_ddf = {
 
        .avail_size     = avail_size_ddf,
 
+       .compare_super  = compare_super_ddf,
+
        .load_super     = load_super_ddf,
        .init_super     = init_zero_ddf,
        .store_super    = store_zero_ddf,