imsm: update array size information in metadata

When disks are added size has to increase in metadata.
This size should be used by common code to set size in md when reshape will be finished.

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 ffb03437697e55ede723d916862bf545b8d13df2..c52aea87d38ae7459d6710bbcc21e560445d4256 100644 (file)
--- a/super-intel.c
+++ b/super-intel.c
@@ -5646,6 +5646,7 @@ static void imsm_process_update(struct supertype *st,
                        void **sp = update->space_list;
                        struct imsm_dev *newdev;
                        struct imsm_map *newmap, *oldmap;
+                       int used_disks;
 
                        if (!sp)
                                continue;
@@ -5678,6 +5679,28 @@ static void imsm_process_update(struct supertype *st,
                                memcpy(newmap, oldmap, sizeof_imsm_map(oldmap));
                        }
 
+                       /* calculate new size
+                        */
+                       used_disks = imsm_num_data_members(newdev, 0);
+                       if (used_disks) {
+                               unsigned long long array_blocks;
+
+                               array_blocks =
+                                       newmap->blocks_per_member
+                                       * used_disks;
+                               /* round array size down to closest MB
+                                */
+                               array_blocks = (array_blocks
+                                               >> SECT_PER_MB_SHIFT)
+                                       << SECT_PER_MB_SHIFT;
+                               newdev->size_low =
+                                       __cpu_to_le32(
+                                               (__u32)array_blocks);
+                               newdev->size_high =
+                                       __cpu_to_le32(
+                                               (__u32)(array_blocks >> 32));
+                       }
+
                        sp = (void **)id->dev;
                        id->dev = newdev;
                        *sp = tofree;