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Diffstat (limited to 'drivers/md/raid1.h')
-rw-r--r--drivers/md/raid1.h85
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