Add MD_ARRAY_SIZE for --examine --export

An additional pair of key=value for --examine --export.

Signed-off-by: Maciej Naruszewicz <maciej.naruszewicz@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/super1.c b/super1.c
index b04945f51f3efbfff203e502f05ec9ebf94dfca5..0df5beeabd1137fdeaf812374959f6de1585006a 100644 (file)
--- a/super1.c
+++ b/super1.c
@@ -495,6 +495,7 @@ static void export_examine_super1(struct supertype *st)
        struct mdp_superblock_1 *sb = st->sb;
        int i;
        int len = 32;
+       int layout;
 
        printf("MD_LEVEL=%s\n", map_num(pers, __le32_to_cpu(sb->level)));
        printf("MD_DEVICES=%d\n", __le32_to_cpu(sb->raid_disks));
@@ -506,6 +507,24 @@ static void export_examine_super1(struct supertype *st)
                }
        if (len)
                printf("MD_NAME=%.*s\n", len, sb->set_name);
+       if (__le32_to_cpu(sb->level) > 0) {
+               int ddsks = 0, ddsks_denom = 1;
+               switch(__le32_to_cpu(sb->level)) {
+                       case 1: ddsks=1;break;
+                       case 4:
+                       case 5: ddsks = __le32_to_cpu(sb->raid_disks)-1; break;
+                       case 6: ddsks = __le32_to_cpu(sb->raid_disks)-2; break;
+                       case 10:
+                               layout = __le32_to_cpu(sb->layout);
+                               ddsks = __le32_to_cpu(sb->raid_disks);
+                               ddsks_denom = (layout&255) * ((layout>>8)&255);
+                       }
+               if (ddsks) {
+                       long long asize = __le64_to_cpu(sb->size);
+                       asize = (asize << 9) * ddsks / ddsks_denom;
+                       printf("MD_ARRAY_SIZE=%s\n",human_size_brief(asize,JEDEC));
+               }
+       }
        printf("MD_UUID=");
        for (i=0; i<16; i++) {
                if ((i&3)==0 && i != 0) printf(":");