1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/raid/raid5.h b/include/linux/raid/raid5.h
index b7b2653af7bb..6fa274aea2a0 100644
--- a/include/linux/raid/raid5.h
+++ b/include/linux/raid/raid5.h
@@ -135,6 +135,7 @@ struct stripe_head {
         atomic_t                count;                  /* nr of active thread/requests */
         spinlock_t              lock;
         int                     bm_seq; /* sequence number for bitmap flushes */
+        int                     disks;                  /* disks in stripe */
         struct r5dev {
                 struct bio      req;
                 struct bio_vec  vec;
@@ -174,6 +175,7 @@ struct stripe_head {
 #define STRIPE_DELAYED          6
 #define STRIPE_DEGRADED         7
 #define STRIPE_BIT_DELAY        8
+#define STRIPE_EXPANDING        9
 
 /*
  * Plugging:
@@ -211,6 +213,10 @@ struct raid5_private_data {
         int                     raid_disks, working_disks, failed_disks;
         int                     max_nr_stripes;
 
+        /* used during an expand */
+        sector_t                expand_progress;        /* MaxSector when no expand happening */
+        int                     previous_raid_disks;
+
         struct list_head        handle_list; /* stripes needing handling */
         struct list_head        delayed_list; /* stripes that have plugged requests */
         struct list_head        bitmap_list; /* stripes delaying awaiting bitmap update */