1 files changed, 19 insertions, 3 deletions

diff --git a/include/linux/raid/raid10.h b/include/linux/raid/raid10.h
index 60708789c8f9..b1103298a8c2 100644
--- a/include/linux/raid/raid10.h
+++ b/include/linux/raid/raid10.h
@@ -35,18 +35,26 @@ struct r10_private_data_s {
         sector_t chunk_mask;
 
         struct list_head        retry_list;
-        /* for use when syncing mirrors: */
+        /* queue pending writes and submit them on unplug */
+        struct bio_list         pending_bio_list;
+
 
         spinlock_t              resync_lock;
         int nr_pending;
+        int nr_waiting;
+        int nr_queued;
         int barrier;
         sector_t                next_resync;
+        int                     fullsync;  /* set to 1 if a full sync is needed,
+                                            * (fresh device added).
+                                            * Cleared when a sync completes.
+                                            */
 
-        wait_queue_head_t       wait_idle;
-        wait_queue_head_t       wait_resume;
+        wait_queue_head_t       wait_barrier;
 
         mempool_t *r10bio_pool;
         mempool_t *r10buf_pool;
+        struct page             *tmppage;
 };
 
 typedef struct r10_private_data_s conf_t;
@@ -96,8 +104,16 @@ struct r10bio_s {
         } devs[0];
 };
 
+/* when we get a read error on a read-only array, we redirect to another
+ * device without failing the first device, or trying to over-write to
+ * correct the read error.  To keep track of bad blocks on a per-bio
+ * level, we store IO_BLOCKED in the appropriate 'bios' pointer
+ */
+#define IO_BLOCKED ((struct bio*)1)
+
 /* bits for r10bio.state */
 #define R10BIO_Uptodate 0
 #define R10BIO_IsSync   1
 #define R10BIO_IsRecover 2
+#define R10BIO_Degraded 3
 #endif