52 	struct mddev *mddev;		/* RAID array if running */  member
296 struct mddev {  struct
297 	void				*private;
298 	struct md_personality		*pers;
299 	dev_t				unit;
300 	int				md_minor;
301 	struct list_head		disks;
302 	unsigned long			flags;
303 	unsigned long			sb_flags;
305 	int				suspended;
306 	struct mutex			suspend_mutex;
307 	struct percpu_ref		active_io;
308 	int				ro;
309 	int				sysfs_active; /* set when sysfs deletes
313 	struct gendisk			*gendisk;
315 	struct kobject			kobj;
316 	int				hold_active;
321 	int				major_version,
322 					minor_version,
323 					patch_version;
324 	int				persistent;
325 	int				external;	/* metadata is
327 	char				metadata_type[17]; /* externally set*/
328 	int				chunk_sectors;
329 	time64_t			ctime, utime;
330 	int				level, layout;
331 	char				clevel[16];
332 	int				raid_disks;
333 	int				max_disks;
334 	sector_t			dev_sectors;	/* used size of
336 	sector_t			array_sectors; /* exported array size */
337 	int				external_size; /* size managed
339 	__u64				events;
345 	int				can_decrease_events;
347 	char				uuid[16];
354 	sector_t			reshape_position;
355 	int				delta_disks, new_level, new_layout;
356 	int				new_chunk_sectors;
357 	int				reshape_backwards;
359 	struct md_thread __rcu		*thread;	/* management thread */
360 	struct md_thread __rcu		*sync_thread;	/* doing resync or reconstruct */
368 	char				*last_sync_action;
369 	sector_t			curr_resync;	/* last block scheduled */
376 	sector_t			curr_resync_completed;
377 	unsigned long			resync_mark;	/* a recent timestamp */
378 	sector_t			resync_mark_cnt;/* blocks written at resync_mark */
379 	sector_t			curr_mark_cnt; /* blocks scheduled now */
381 	sector_t			resync_max_sectors; /* may be set by personality */
383 	atomic64_t			resync_mismatches; /* count of sectors where
388 	sector_t			suspend_lo;
389 	sector_t			suspend_hi;
391 	int				sync_speed_min;
392 	int				sync_speed_max;
395 	int				parallel_resync;
397 	int				ok_start_degraded;
399 	unsigned long			recovery;
405 	int				recovery_disabled;
407 	int				in_sync;	/* know to not need resync */
417 	struct mutex			open_mutex;
418 	struct mutex			reconfig_mutex;
419 	atomic_t			active;		/* general refcount */
420 	atomic_t			openers;	/* number of active opens */
422 	int				changed;	/* True if we might need to
424 	int				degraded;	/* whether md should consider
428 	atomic_t			recovery_active; /* blocks scheduled, but not written */
429 	wait_queue_head_t		recovery_wait;
430 	sector_t			recovery_cp;
431 	sector_t			resync_min;	/* user requested sync
433 	sector_t			resync_max;	/* resync should pause
436 	struct kernfs_node		*sysfs_state;	/* handle for 'array_state'
439 	struct kernfs_node		*sysfs_action;  /* handle for 'sync_action' */
440 	struct kernfs_node		*sysfs_completed;	/*handle for 'sync_completed' */
441 	struct kernfs_node		*sysfs_degraded;	/*handle for 'degraded' */
442 	struct kernfs_node		*sysfs_level;		/*handle for 'level' */
445 	struct work_struct del_work;
447 	struct work_struct sync_work;
460 	spinlock_t			lock;
461 	wait_queue_head_t		sb_wait;	/* for waiting on superblock updates */
462 	atomic_t			pending_writes;	/* number of active superblock writes */
464 	unsigned int			safemode;	/* if set, update "clean" superblock
467 	unsigned int			safemode_delay;
468 	struct timer_list		safemode_timer;
469 	struct percpu_ref		writes_pending;
470 	int				sync_checkers;	/* # of threads checking writes_pending */
471 	struct request_queue		*queue;	/* for plugging ... */
473 	struct bitmap			*bitmap; /* the bitmap for the device */
474 	struct {
499 	struct list_head		all_mddevs;  argument
521 	void (*sync_super)(struct mddev *mddev, struct md_rdev *rdev);  argument
522 	struct md_cluster_info		*cluster_info;
523 	unsigned int			good_device_nr;	/* good device num within cluster raid */
524 	unsigned int			noio_flag; /* for memalloc scope API */
530 	struct list_head		deleting;
533 	struct mutex			sync_mutex;
535 	atomic_t sync_seq;
537 	bool	has_superblocks:1;
561 static inline int __must_check mddev_lock(struct mddev *mddev)  in mddev_lock()
569 static inline void mddev_lock_nointr(struct mddev *mddev)  in mddev_lock_nointr()
574 static inline int mddev_trylock(struct mddev *mddev)  in mddev_trylock()
658 static inline char * mdname (struct mddev * mddev)  in mdname()
663 static inline int sysfs_link_rdev(struct mddev *mddev, struct md_rdev *rdev)  in sysfs_link_rdev()
675 static inline void sysfs_unlink_rdev(struct mddev *mddev, struct md_rdev *rdev)  in sysfs_unlink_rdev()
696 #define rdev_for_each(rdev, mddev)				\  argument
699 #define rdev_for_each_safe(rdev, tmp, mddev)				\  argument
702 #define rdev_for_each_rcu(rdev, mddev)				\  argument
707 	struct mddev		*mddev;  member
716 	struct mddev	*mddev;  member
798 static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev)  in rdev_dec_pending()
808 static inline int mddev_is_clustered(struct mddev *mddev)  in mddev_is_clustered()
814 static inline void mddev_clear_unsupported_flags(struct mddev *mddev,  in mddev_clear_unsupported_flags()
820 static inline void mddev_check_write_zeroes(struct mddev *mddev, struct bio *bio)  in mddev_check_write_zeroes()
827 static inline int mddev_suspend_and_lock(struct mddev *mddev)  in mddev_suspend_and_lock()
842 static inline void mddev_suspend_and_lock_nointr(struct mddev *mddev)  in mddev_suspend_and_lock_nointr()
848 static inline void mddev_unlock_and_resume(struct mddev *mddev)  in mddev_unlock_and_resume()