1 files changed, 103 insertions, 0 deletions
diff --git a/include/linux/raid/raid10.h b/include/linux/raid/raid10.h
new file mode 100644
index 000000000000..60708789c8f9
--- /dev/null
+++ b/include/linux/raid/raid10.h
@@ -0,0 +1,103 @@
+#ifndef _RAID10_H
+#define _RAID10_H
+#include <linux/raid/md.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;
+        int                     working_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                     copies;       /* near_copies * far_copies.
+                                               * must be <= raid_disks
+                                               */
+        sector_t                stride;       /* distance between far copies.
+                                               * This is size / far_copies
+                                               */
+        int chunk_shift; /* shift from chunks to sectors */
+        sector_t chunk_mask;
+        struct list_head        retry_list;
+        /* for use when syncing mirrors: */
+        spinlock_t              resync_lock;
+        int nr_pending;
+        int barrier;
+        sector_t                next_resync;
+        wait_queue_head_t       wait_idle;
+        wait_queue_head_t       wait_resume;
+        mempool_t *r10bio_pool;
+        mempool_t *r10buf_pool;
+};
+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];
+};
+/* bits for r10bio.state */
+#define R10BIO_Uptodate 0
+#define R10BIO_IsSync   1
+#define R10BIO_IsRecover 2
+#endif

diff --git a/include/linux/raid/raid10.h b/include/linux/raid/raid10.h new file mode 100644 index 000000000000..60708789c8f9 --- /dev/null +++ b/include/linux/raid/raid10.h
@@ -0,0 +1,103 @@
	1	#ifndef _RAID10_H
	2	#define _RAID10_H
	3
	4	#include <linux/raid/md.h>
	5
	6	typedef struct mirror_info mirror_info_t;
	7
	8	struct mirror_info {
	9	mdk_rdev_t *rdev;
	10	sector_t head_position;
	11	};
	12
	13	typedef struct r10bio_s r10bio_t;
	14
	15	struct r10_private_data_s {
	16	mddev_t *mddev;
	17	mirror_info_t *mirrors;
	18	int raid_disks;
	19	int working_disks;
	20	spinlock_t device_lock;
	21
	22	/* geometry */
	23	int near_copies; /* number of copies layed out raid0 style */
	24	int far_copies; /* number of copies layed out
	25	* at large strides across drives
	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
	32	*/
	33
	34	int chunk_shift; /* shift from chunks to sectors */
	35	sector_t chunk_mask;
	36
	37	struct list_head retry_list;
	38	/* for use when syncing mirrors: */
	39
	40	spinlock_t resync_lock;
	41	int nr_pending;
	42	int barrier;
	43	sector_t next_resync;
	44
	45	wait_queue_head_t wait_idle;
	46	wait_queue_head_t wait_resume;
	47
	48	mempool_t *r10bio_pool;
	49	mempool_t *r10buf_pool;
	50	};
	51
	52	typedef struct r10_private_data_s conf_t;
	53
	54	/*
	55	* this is the only point in the RAID code where we violate
	56	* C type safety. mddev->private is an 'opaque' pointer.
	57	*/
	58	#define mddev_to_conf(mddev) ((conf_t *) mddev->private)
	59
	60	/*
	61	* this is our 'private' RAID10 bio.
	62	*
	63	* it contains information about what kind of IO operations were started
	64	* for this RAID10 operation, and about their status:
	65	*/
	66
	67	struct r10bio_s {
	68	atomic_t remaining; /* 'have we finished' count,
	69	* used from IRQ handlers
	70	*/
	71	sector_t sector; /* virtual sector number */
	72	int sectors;
	73	unsigned long state;
	74	mddev_t *mddev;
	75	/*
	76	* original bio going to /dev/mdx
	77	*/
	78	struct bio *master_bio;
	79	/*
	80	* if the IO is in READ direction, then this is where we read
	81	*/
	82	int read_slot;
	83
	84	struct list_head retry_list;
	85	/*
	86	* if the IO is in WRITE direction, then multiple bios are used,
	87	* one for each copy.
	88	* When resyncing we also use one for each copy.
	89	* When reconstructing, we use 2 bios, one for read, one for write.
	90	* We choose the number when they are allocated.
	91	*/
	92	struct {
	93	struct bio *bio;
	94	sector_t addr;
	95	int devnum;
	96	} devs[0];
	97	};
	98
	99	/* bits for r10bio.state */
	100	#define R10BIO_Uptodate 0
	101	#define R10BIO_IsSync 1
	102	#define R10BIO_IsRecover 2
	103	#endif