imsm: fix: report aligned component size value

OROM can create array with chunk size not aligned.
To resolve this problem in mdadm, metadata handler has to report
component size aligned value for mdadm operations
while metadata value stays unchanged.

Do not correct alignment for raid1 and in error case.

Correction allows check in analyse_change() (Grow.c:905) to pass.

Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/super-intel.c b/super-intel.c
index 362e433021ad9114f387e8ab1efa1bdb4cd80536..dc5e34e35f0d09a6c498dcd957b360b4fb5d9873 100644 (file)
--- a/super-intel.c
+++ b/super-intel.c
@@ -1745,6 +1745,7 @@ static void getinfo_super_imsm_volume(struct supertype *st, struct mdinfo *info,
        struct imsm_map *map_to_analyse = map;
        struct dl *dl;
        char *devname;
+       unsigned int component_size_alligment;
        int map_disks = info->array.raid_disks;
 
        if (prev_map)
@@ -1824,6 +1825,21 @@ static void getinfo_super_imsm_volume(struct supertype *st, struct mdinfo *info,
        info->data_offset         = __le32_to_cpu(map_to_analyse->pba_of_lba0);
        info->component_size      =
                __le32_to_cpu(map_to_analyse->blocks_per_member);
+
+       /* check component size aligment
+        */
+       component_size_alligment =
+               info->component_size % (info->array.chunk_size/512);
+
+       if (component_size_alligment &&
+           (info->array.level != 1) && (info->array.level != UnSet)) {
+               dprintf("imsm: reported component size alligned from %llu ",
+                       info->component_size);
+               info->component_size -= component_size_alligment;
+               dprintf("to %llu (%i).\n",
+                       info->component_size, component_size_alligment);
+       }
+
        memset(info->uuid, 0, sizeof(info->uuid));
        info->recovery_start = MaxSector;