imsm: FIX: Report correct array size during reshape

When reshape is started imsm stores new size in metadata.
mdadm requires "old" size to proper initialization restarted array.

When reshape is in progress getinfo_super_imsm_volume() should report
computed array size value instead array size stored in metatda.

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 1b3407ae1e06ea4b9099346f92cbd03155fd395a..c101dca744a776c50677c0eada566eb5c2b52639 100644 (file)
--- a/super-intel.c
+++ b/super-intel.c
@@ -1806,6 +1806,19 @@ static void getinfo_super_imsm_volume(struct supertype *st, struct mdinfo *info,
                        dprintf("IMSM: General Migration checkpoint : %llu "
                               "(%llu) -> read reshape progress : %llu\n",
                                units, blocks_per_unit, info->reshape_progress);
+                       unsigned long long array_blocks;
+                       int used_disks;
+
+                       used_disks = imsm_num_data_members(dev, 1);
+                       if (used_disks > 0) {
+                               array_blocks = map->blocks_per_member *
+                                       used_disks;
+                               /* round array size down to closest MB
+                                */
+                               info->custom_array_size = (array_blocks
+                                               >> SECT_PER_MB_SHIFT)
+                                               << SECT_PER_MB_SHIFT;
+                       }
                }
                case MIGR_VERIFY:
                        /* we could emulate the checkpointing of