1 files changed, 52 insertions, 33 deletions

diff --git a/drivers/md/raid1.h b/drivers/md/raid1.h
index e0d676b48974..c732b6cce935 100644
--- a/drivers/md/raid1.h
+++ b/drivers/md/raid1.h
@@ -1,10 +1,8 @@
 #ifndef _RAID1_H
 #define _RAID1_H
 
-typedef struct mirror_info mirror_info_t;
-
 struct mirror_info {
-	mdk_rdev_t	*rdev;
+	struct md_rdev	*rdev;
 	sector_t	head_position;
 };
 
@@ -17,61 +15,82 @@ struct mirror_info {
  */
 
 struct pool_info {
-	mddev_t *mddev;
+	struct mddev *mddev;
 	int	raid_disks;
 };
 
-
-typedef struct r1bio_s r1bio_t;
-
-struct r1_private_data_s {
-	mddev_t			*mddev;
-	mirror_info_t		*mirrors;
+struct r1conf {
+	struct mddev		*mddev;
+	struct mirror_info		*mirrors;
 	int			raid_disks;
+
+	/* When choose the best device for a read (read_balance())
+	 * we try to keep sequential reads one the same device
+	 * using 'last_used' and 'next_seq_sect'
+	 */
 	int			last_used;
 	sector_t		next_seq_sect;
+	/* During resync, read_balancing is only allowed on the part
+	 * of the array that has been resynced.  'next_resync' tells us
+	 * where that is.
+	 */
+	sector_t		next_resync;
+
 	spinlock_t		device_lock;
 
+	/* list of 'struct r1bio' that need to be processed by raid1d,
+	 * whether to retry a read, writeout a resync or recovery
+	 * block, or anything else.
+	 */
 	struct list_head	retry_list;
-	/* queue pending writes and submit them on unplug */
-	struct bio_list		pending_bio_list;
 
-	/* for use when syncing mirrors: */
+	/* queue pending writes to be submitted on unplug */
+	struct bio_list		pending_bio_list;
+	int			pending_count;
 
+	/* for use when syncing mirrors:
+	 * We don't allow both normal IO and resync/recovery IO at
+	 * the same time - resync/recovery can only happen when there
+	 * is no other IO.  So when either is active, the other has to wait.
+	 * See more details description in raid1.c near raise_barrier().
+	 */
+	wait_queue_head_t	wait_barrier;
 	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.
-					    */
-	int			recovery_disabled; /* when the same as
-						    * mddev->recovery_disabled
-						    * we don't allow recovery
-						    * to be attempted as we
-						    * expect a read error
-						    */
 
-	wait_queue_head_t	wait_barrier;
+	/* Set to 1 if a full sync is needed, (fresh device added).
+	 * Cleared when a sync completes.
+	 */
+	int			fullsync;
 
+	/* When the same as mddev->recovery_disabled we don't allow
+	 * recovery to be attempted as we expect a read error.
+	 */
+	int			recovery_disabled;
+
+
+	/* poolinfo contains information about the content of the
+	 * mempools - it changes when the array grows or shrinks
+	 */
 	struct pool_info	*poolinfo;
+	mempool_t		*r1bio_pool;
+	mempool_t		*r1buf_pool;
 
+	/* temporary buffer to synchronous IO when attempting to repair
+	 * a read error.
+	 */
 	struct page		*tmppage;
 
-	mempool_t *r1bio_pool;
-	mempool_t *r1buf_pool;
 
 	/* When taking over an array from a different personality, we store
 	 * the new thread here until we fully activate the array.
 	 */
-	struct mdk_thread_s	*thread;
+	struct md_thread	*thread;
 };
 
-typedef struct r1_private_data_s conf_t;
-
 /*
  * this is our 'private' RAID1 bio.
  *
@@ -79,7 +98,7 @@ typedef struct r1_private_data_s conf_t;
  * for this RAID1 operation, and about their status:
  */
 
-struct r1bio_s {
+struct r1bio {
 	atomic_t		remaining; /* 'have we finished' count,
 					    * used from IRQ handlers
 					    */
@@ -89,7 +108,7 @@ struct r1bio_s {
 	sector_t		sector;
 	int			sectors;
 	unsigned long		state;
-	mddev_t			*mddev;
+	struct mddev		*mddev;
 	/*
 	 * original bio going to /dev/mdx
 	 */
@@ -148,6 +167,6 @@ struct r1bio_s {
 #define	R1BIO_MadeGood 7
 #define	R1BIO_WriteError 8
 
-extern int md_raid1_congested(mddev_t *mddev, int bits);
+extern int md_raid1_congested(struct mddev *mddev, int bits);
 
 #endif