X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Flinux%2Fraid%2Fraid5.h;h=914af667044f6f39eaf0a9ef51e6fa1966b44175;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=d63ddcb4afadf4000cdb1bb775abe5b9dc392d70;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git

diff --git a/include/linux/raid/raid5.h b/include/linux/raid/raid5.h
index d63ddcb4a..914af6670 100644
--- a/include/linux/raid/raid5.h
+++ b/include/linux/raid/raid5.h
@@ -126,7 +126,7 @@
  */
 
 struct stripe_head {
-	struct stripe_head	*hash_next, **hash_pprev; /* hash pointers */
+	struct hlist_node	hash;
 	struct list_head	lru;			/* inactive_list or handle_list */
 	struct raid5_private_data	*raid_conf;
 	sector_t		sector;			/* sector of this row */
@@ -134,6 +134,8 @@ struct stripe_head {
 	unsigned long		state;			/* state flags */
 	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;
@@ -151,9 +153,11 @@ struct stripe_head {
 #define	R5_Insync	3	/* rdev && rdev->in_sync at start */
 #define	R5_Wantread	4	/* want to schedule a read */
 #define	R5_Wantwrite	5
-#define	R5_Syncio	6	/* this io need to be accounted as resync io */
 #define	R5_Overlap	7	/* There is a pending overlapping request on this block */
+#define	R5_ReadError	8	/* seen a read error here recently */
+#define	R5_ReWrite	9	/* have tried to over-write the readerror */
 
+#define	R5_Expanded	10	/* This block now has post-expand data */
 /*
  * Write method
  */
@@ -165,13 +169,16 @@ struct stripe_head {
 /*
  * Stripe state
  */
-#define STRIPE_ERROR		1
 #define STRIPE_HANDLE		2
 #define	STRIPE_SYNCING		3
 #define	STRIPE_INSYNC		4
 #define	STRIPE_PREREAD_ACTIVE	5
 #define	STRIPE_DELAYED		6
-
+#define	STRIPE_DEGRADED		7
+#define	STRIPE_BIT_DELAY	8
+#define	STRIPE_EXPANDING	9
+#define	STRIPE_EXPAND_SOURCE	10
+#define	STRIPE_EXPAND_READY	11
 /*
  * Plugging:
  *
@@ -201,19 +208,43 @@ struct disk_info {
 };
 
 struct raid5_private_data {
-	struct stripe_head	**stripe_hashtbl;
+	struct hlist_head	*stripe_hashtbl;
 	mddev_t			*mddev;
 	struct disk_info	*spare;
 	int			chunk_size, level, algorithm;
 	int			raid_disks, working_disks, failed_disks;
 	int			max_nr_stripes;
 
+	/* used during an expand */
+	sector_t		expand_progress;	/* MaxSector when no expand happening */
+	sector_t		expand_lo; /* from here up to expand_progress it out-of-bounds
+					    * as we haven't flushed the metadata yet
+					    */
+	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 */
 	atomic_t		preread_active_stripes; /* stripes with scheduled io */
 
-	char			cache_name[20];
+	atomic_t		reshape_stripes; /* stripes with pending writes for reshape */
+	/* unfortunately we need two cache names as we temporarily have
+	 * two caches.
+	 */
+	int			active_name;
+	char			cache_name[2][20];
 	kmem_cache_t		*slab_cache; /* for allocating stripes */
+
+	int			seq_flush, seq_write;
+	int			quiesce;
+
+	int			fullsync;  /* set to 1 if a full sync is needed,
+					    * (fresh device added).
+					    * Cleared when a sync completes.
+					    */
+
+	struct page 		*spare_page; /* Used when checking P/Q in raid6 */
+
 	/*
 	 * Free stripes pool
 	 */
@@ -223,9 +254,10 @@ struct raid5_private_data {
 	wait_queue_head_t	wait_for_overlap;
 	int			inactive_blocked;	/* release of inactive stripes blocked,
 							 * waiting for 25% to be free
-							 */        
+							 */
+	int			pool_size; /* number of disks in stripeheads in pool */
 	spinlock_t		device_lock;
-	struct disk_info	disks[0];
+	struct disk_info	*disks;
 };
 
 typedef struct raid5_private_data raid5_conf_t;