1 files changed, 121 insertions, 0 deletions
diff --git a/drivers/md/raid10.h b/drivers/md/raid10.h
new file mode 100644
index 000000000000..244dbe507a54
--- /dev/null
+++ b/drivers/md/raid10.h
@@ -0,0 +1,121 @@
+#ifndef _RAID10_H
+#define _RAID10_H
+typedef struct mirror_info mirror_info_t;
+struct mirror_info {
+        mdk_rdev_t      *rdev;
+        sector_t        head_position;
+};
+typedef struct r10bio_s r10bio_t;
+struct r10_private_data_s {
+        mddev_t                 *mddev;
+        mirror_info_t           *mirrors;
+        int                     raid_disks;
+        spinlock_t              device_lock;
+        /* geometry */
+        int                     near_copies;  /* number of copies layed out raid0 style */
+        int                     far_copies;   /* number of copies layed out
+                                               * at large strides across drives
+                                               */
+        int                     far_offset;   /* far_copies are offset by 1 stripe
+                                               * instead of many
+                                               */
+        int                     copies;       /* near_copies * far_copies.
+                                               * must be <= raid_disks
+                                               */
+        sector_t                stride;       /* distance between far copies.
+                                               * This is size / far_copies unless
+                                               * far_offset, in which case it is
+                                               * 1 stripe.
+                                               */
+        int chunk_shift; /* shift from chunks to sectors */
+        sector_t chunk_mask;
+        struct list_head        retry_list;
+        /* 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_barrier;
+        mempool_t *r10bio_pool;
+        mempool_t *r10buf_pool;
+        struct page             *tmppage;
+};
+typedef struct r10_private_data_s conf_t;
+/*
+ * this is the only point in the RAID code where we violate
+ * C type safety. mddev->private is an 'opaque' pointer.
+ */
+#define mddev_to_conf(mddev) ((conf_t *) mddev->private)
+/*
+ * this is our 'private' RAID10 bio.
+ *
+ * it contains information about what kind of IO operations were started
+ * for this RAID10 operation, and about their status:
+ */
+struct r10bio_s {
+        atomic_t                remaining; /* 'have we finished' count,
+                                            * used from IRQ handlers
+                                            */
+        sector_t                sector; /* virtual sector number */
+        int                     sectors;
+        unsigned long           state;
+        mddev_t                 *mddev;
+        /*
+         * original bio going to /dev/mdx
+         */
+        struct bio              *master_bio;
+        /*
+         * if the IO is in READ direction, then this is where we read
+         */
+        int                     read_slot;
+        struct list_head        retry_list;
+        /*
+         * if the IO is in WRITE direction, then multiple bios are used,
+         * one for each copy.
+         * When resyncing we also use one for each copy.
+         * When reconstructing, we use 2 bios, one for read, one for write.
+         * We choose the number when they are allocated.
+         */
+        struct {
+                struct bio              *bio;
+                sector_t addr;
+                int devnum;
+        } 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

diff --git a/drivers/md/raid10.h b/drivers/md/raid10.h new file mode 100644 index 000000000000..244dbe507a54 --- /dev/null +++ b/drivers/md/raid10.h
@@ -0,0 +1,121 @@
	1	#ifndef _RAID10_H
	2	#define _RAID10_H
	3
	4	typedef struct mirror_info mirror_info_t;
	5
	6	struct mirror_info {
	7	mdk_rdev_t *rdev;
	8	sector_t head_position;
	9	};
	10
	11	typedef struct r10bio_s r10bio_t;
	12
	13	struct r10_private_data_s {
	14	mddev_t *mddev;
	15	mirror_info_t *mirrors;
	16	int raid_disks;
	17	spinlock_t device_lock;
	18
	19	/* geometry */
	20	int near_copies; /* number of copies layed out raid0 style */
	21	int far_copies; /* number of copies layed out
	22	* at large strides across drives
	23	*/
	24	int far_offset; /* far_copies are offset by 1 stripe
	25	* instead of many
	26	*/
	27	int copies; /* near_copies * far_copies.
	28	* must be <= raid_disks
	29	*/
	30	sector_t stride; /* distance between far copies.
	31	* This is size / far_copies unless
	32	* far_offset, in which case it is
	33	* 1 stripe.
	34	*/
	35
	36	int chunk_shift; /* shift from chunks to sectors */
	37	sector_t chunk_mask;
	38
	39	struct list_head retry_list;
	40	/* queue pending writes and submit them on unplug */
	41	struct bio_list pending_bio_list;
	42
	43
	44	spinlock_t resync_lock;
	45	int nr_pending;
	46	int nr_waiting;
	47	int nr_queued;
	48	int barrier;
	49	sector_t next_resync;
	50	int fullsync; /* set to 1 if a full sync is needed,
	51	* (fresh device added).
	52	* Cleared when a sync completes.
	53	*/
	54
	55	wait_queue_head_t wait_barrier;
	56
	57	mempool_t *r10bio_pool;
	58	mempool_t *r10buf_pool;
	59	struct page *tmppage;
	60	};
	61
	62	typedef struct r10_private_data_s conf_t;
	63
	64	/*
	65	* this is the only point in the RAID code where we violate
	66	* C type safety. mddev->private is an 'opaque' pointer.
	67	*/
	68	#define mddev_to_conf(mddev) ((conf_t *) mddev->private)
	69
	70	/*
	71	* this is our 'private' RAID10 bio.
	72	*
	73	* it contains information about what kind of IO operations were started
	74	* for this RAID10 operation, and about their status:
	75	*/
	76
	77	struct r10bio_s {
	78	atomic_t remaining; /* 'have we finished' count,
	79	* used from IRQ handlers
	80	*/
	81	sector_t sector; /* virtual sector number */
	82	int sectors;
	83	unsigned long state;
	84	mddev_t *mddev;
	85	/*
	86	* original bio going to /dev/mdx
	87	*/
	88	struct bio *master_bio;
	89	/*
	90	* if the IO is in READ direction, then this is where we read
	91	*/
	92	int read_slot;
	93
	94	struct list_head retry_list;
	95	/*
	96	* if the IO is in WRITE direction, then multiple bios are used,
	97	* one for each copy.
	98	* When resyncing we also use one for each copy.
	99	* When reconstructing, we use 2 bios, one for read, one for write.
	100	* We choose the number when they are allocated.
	101	*/
	102	struct {
	103	struct bio *bio;
	104	sector_t addr;
	105	int devnum;
	106	} devs[0];
	107	};
	108
	109	/* when we get a read error on a read-only array, we redirect to another
	110	* device without failing the first device, or trying to over-write to
	111	* correct the read error. To keep track of bad blocks on a per-bio
	112	* level, we store IO_BLOCKED in the appropriate 'bios' pointer
	113	*/
	114	#define IO_BLOCKED ((struct bio*)1)
	115
	116	/* bits for r10bio.state */
	117	#define R10BIO_Uptodate 0
	118	#define R10BIO_IsSync 1
	119	#define R10BIO_IsRecover 2
	120	#define R10BIO_Degraded 3
	121	#endif