52 	struct mddev *mddev;		/* RAID array if running */  member
309 struct mddev {  struct
310 	void				*private;
311 	struct md_personality		*pers;
312 	dev_t				unit;
313 	int				md_minor;
314 	struct list_head		disks;
315 	unsigned long			flags;
316 	unsigned long			sb_flags;
318 	int				suspended;
319 	struct percpu_ref		active_io;
320 	int				ro;
321 	int				sysfs_active; /* set when sysfs deletes
325 	struct gendisk			*gendisk;
327 	struct kobject			kobj;
328 	int				hold_active;
333 	int				major_version,
334 					minor_version,
335 					patch_version;
336 	int				persistent;
337 	int				external;	/* metadata is
339 	char				metadata_type[17]; /* externally set*/
340 	int				chunk_sectors;
341 	time64_t			ctime, utime;
342 	int				level, layout;
343 	char				clevel[16];
344 	int				raid_disks;
345 	int				max_disks;
346 	sector_t			dev_sectors;	/* used size of
348 	sector_t			array_sectors; /* exported array size */
349 	int				external_size; /* size managed
351 	__u64				events;
357 	int				can_decrease_events;
359 	char				uuid[16];
366 	sector_t			reshape_position;
367 	int				delta_disks, new_level, new_layout;
368 	int				new_chunk_sectors;
369 	int				reshape_backwards;
371 	struct md_thread __rcu		*thread;	/* management thread */
372 	struct md_thread __rcu		*sync_thread;	/* doing resync or reconstruct */
380 	char				*last_sync_action;
381 	sector_t			curr_resync;	/* last block scheduled */
388 	sector_t			curr_resync_completed;
389 	unsigned long			resync_mark;	/* a recent timestamp */
390 	sector_t			resync_mark_cnt;/* blocks written at resync_mark */
391 	sector_t			curr_mark_cnt; /* blocks scheduled now */
393 	sector_t			resync_max_sectors; /* may be set by personality */
395 	atomic64_t			resync_mismatches; /* count of sectors where
400 	sector_t			suspend_lo;
401 	sector_t			suspend_hi;
403 	int				sync_speed_min;
404 	int				sync_speed_max;
407 	int				parallel_resync;
409 	int				ok_start_degraded;
411 	unsigned long			recovery;
417 	int				recovery_disabled;
419 	int				in_sync;	/* know to not need resync */
429 	struct mutex			open_mutex;
430 	struct mutex			reconfig_mutex;
431 	atomic_t			active;		/* general refcount */
432 	atomic_t			openers;	/* number of active opens */
434 	int				changed;	/* True if we might need to
436 	int				degraded;	/* whether md should consider
440 	atomic_t			recovery_active; /* blocks scheduled, but not written */
441 	wait_queue_head_t		recovery_wait;
442 	sector_t			recovery_cp;
443 	sector_t			resync_min;	/* user requested sync
445 	sector_t			resync_max;	/* resync should pause
448 	struct kernfs_node		*sysfs_state;	/* handle for 'array_state'
451 	struct kernfs_node		*sysfs_action;  /* handle for 'sync_action' */
452 	struct kernfs_node		*sysfs_completed;	/*handle for 'sync_completed' */
453 	struct kernfs_node		*sysfs_degraded;	/*handle for 'degraded' */
454 	struct kernfs_node		*sysfs_level;		/*handle for 'level' */
456 	struct work_struct del_work;	/* used for delayed sysfs removal */
469 	spinlock_t			lock;
470 	wait_queue_head_t		sb_wait;	/* for waiting on superblock updates */
471 	atomic_t			pending_writes;	/* number of active superblock writes */
473 	unsigned int			safemode;	/* if set, update "clean" superblock
476 	unsigned int			safemode_delay;
477 	struct timer_list		safemode_timer;
478 	struct percpu_ref		writes_pending;
479 	int				sync_checkers;	/* # of threads checking writes_pending */
480 	struct request_queue		*queue;	/* for plugging ... */
482 	struct bitmap			*bitmap; /* the bitmap for the device */
483 	struct {
508 	struct list_head		all_mddevs;  argument
530 	void (*sync_super)(struct mddev *mddev, struct md_rdev *rdev);  argument
531 	struct md_cluster_info		*cluster_info;
532 	unsigned int			good_device_nr;	/* good device num within cluster raid */
533 	unsigned int			noio_flag; /* for memalloc scope API */
539 	struct list_head		deleting;
542 	struct mutex			sync_mutex;
544 	atomic_t sync_seq;
546 	bool	has_superblocks:1;
547 	bool	fail_last_dev:1;
548 	bool	serialize_policy:1;
577 static inline bool md_is_rdwr(struct mddev *mddev)  in md_is_rdwr()
582 static inline bool is_md_suspended(struct mddev *mddev)  in is_md_suspended()
587 static inline int __must_check mddev_lock(struct mddev *mddev)  in mddev_lock()
595 static inline void mddev_lock_nointr(struct mddev *mddev)  in mddev_lock_nointr()
600 static inline int mddev_trylock(struct mddev *mddev)  in mddev_trylock()
685 static inline char * mdname (struct mddev * mddev)  in mdname()
690 static inline int sysfs_link_rdev(struct mddev *mddev, struct md_rdev *rdev)  in sysfs_link_rdev()
702 static inline void sysfs_unlink_rdev(struct mddev *mddev, struct md_rdev *rdev)  in sysfs_unlink_rdev()
723 #define rdev_for_each(rdev, mddev)				\  argument
726 #define rdev_for_each_safe(rdev, tmp, mddev)				\  argument
729 #define rdev_for_each_rcu(rdev, mddev)				\  argument
734 	struct mddev		*mddev;  member
743 	struct mddev	*mddev;  member
826 static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev)  in rdev_dec_pending()
836 static inline int mddev_is_clustered(struct mddev *mddev)  in mddev_is_clustered()
842 static inline void mddev_clear_unsupported_flags(struct mddev *mddev,  in mddev_clear_unsupported_flags()
848 static inline void mddev_check_write_zeroes(struct mddev *mddev, struct bio *bio)  in mddev_check_write_zeroes()