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- #ifndef _RAID1_H
- #define _RAID1_H
- #define BARRIER_UNIT_SECTOR_BITS 17
- #define BARRIER_UNIT_SECTOR_SIZE (1<<17)
- #define BARRIER_BUCKETS_NR_BITS (PAGE_SHIFT - ilog2(sizeof(atomic_t)))
- #define BARRIER_BUCKETS_NR (1<<BARRIER_BUCKETS_NR_BITS)
- struct raid1_info {
- struct md_rdev *rdev;
- sector_t head_position;
-
- sector_t next_seq_sect;
- sector_t seq_start;
- };
- struct pool_info {
- struct mddev *mddev;
- int raid_disks;
- };
- struct r1conf {
- struct mddev *mddev;
- struct raid1_info *mirrors;
- int raid_disks;
- spinlock_t device_lock;
-
- struct list_head retry_list;
-
- struct list_head bio_end_io_list;
-
- struct bio_list pending_bio_list;
-
- wait_queue_head_t wait_barrier;
- spinlock_t resync_lock;
- atomic_t nr_sync_pending;
- atomic_t *nr_pending;
- atomic_t *nr_waiting;
- atomic_t *nr_queued;
- atomic_t *barrier;
- int array_frozen;
-
- int fullsync;
-
- int recovery_disabled;
-
- struct pool_info *poolinfo;
- mempool_t r1bio_pool;
- mempool_t r1buf_pool;
- struct bio_set bio_split;
-
- struct page *tmppage;
-
- struct md_thread *thread;
-
- sector_t cluster_sync_low;
- sector_t cluster_sync_high;
- };
- struct r1bio {
- atomic_t remaining;
- atomic_t behind_remaining;
- sector_t sector;
- int sectors;
- unsigned long state;
- unsigned long start_time;
- struct mddev *mddev;
-
- struct bio *master_bio;
-
- int read_disk;
- struct list_head retry_list;
-
- struct bio *behind_master_bio;
-
- struct bio *bios[];
-
- };
- enum r1bio_state {
- R1BIO_Uptodate,
- R1BIO_IsSync,
- R1BIO_Degraded,
- R1BIO_BehindIO,
- R1BIO_ReadError,
- R1BIO_Returned,
- R1BIO_MadeGood,
- R1BIO_WriteError,
- R1BIO_FailFast,
- };
- static inline int sector_to_idx(sector_t sector)
- {
- return hash_long(sector >> BARRIER_UNIT_SECTOR_BITS,
- BARRIER_BUCKETS_NR_BITS);
- }
- #endif
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