42 	struct mddev *mddev;		/* RAID array if running */  member
274 struct mddev {  struct
275 	void				*private;
276 	struct md_personality		*pers;
277 	dev_t				unit;
278 	int				md_minor;
279 	struct list_head		disks;
280 	unsigned long			flags;
281 	unsigned long			sb_flags;
283 	int				suspended;
284 	atomic_t			active_io;
285 	int				ro;
286 	int				sysfs_active; /* set when sysfs deletes
290 	struct gendisk			*gendisk;
292 	struct kobject			kobj;
293 	int				hold_active;
298 	int				major_version,
299 					minor_version,
300 					patch_version;
301 	int				persistent;
302 	int				external;	/* metadata is
304 	char				metadata_type[17]; /* externally set*/
305 	int				chunk_sectors;
306 	time64_t			ctime, utime;
307 	int				level, layout;
308 	char				clevel[16];
309 	int				raid_disks;
310 	int				max_disks;
311 	sector_t			dev_sectors;	/* used size of
313 	sector_t			array_sectors; /* exported array size */
314 	int				external_size; /* size managed
316 	__u64				events;
322 	int				can_decrease_events;
324 	char				uuid[16];
331 	sector_t			reshape_position;
332 	int				delta_disks, new_level, new_layout;
333 	int				new_chunk_sectors;
334 	int				reshape_backwards;
336 	struct md_thread		*thread;	/* management thread */
337 	struct md_thread		*sync_thread;	/* doing resync or reconstruct */
345 	char				*last_sync_action;
346 	sector_t			curr_resync;	/* last block scheduled */
353 	sector_t			curr_resync_completed;
354 	unsigned long			resync_mark;	/* a recent timestamp */
355 	sector_t			resync_mark_cnt;/* blocks written at resync_mark */
356 	sector_t			curr_mark_cnt; /* blocks scheduled now */
358 	sector_t			resync_max_sectors; /* may be set by personality */
360 	atomic64_t			resync_mismatches; /* count of sectors where
365 	sector_t			suspend_lo;
366 	sector_t			suspend_hi;
368 	int				sync_speed_min;
369 	int				sync_speed_max;
372 	int				parallel_resync;
374 	int				ok_start_degraded;
376 	unsigned long			recovery;
382 	int				recovery_disabled;
384 	int				in_sync;	/* know to not need resync */
394 	struct mutex			open_mutex;
395 	struct mutex			reconfig_mutex;
396 	atomic_t			active;		/* general refcount */
397 	atomic_t			openers;	/* number of active opens */
399 	int				changed;	/* True if we might need to
401 	int				degraded;	/* whether md should consider
405 	atomic_t			recovery_active; /* blocks scheduled, but not written */
406 	wait_queue_head_t		recovery_wait;
407 	sector_t			recovery_cp;
408 	sector_t			resync_min;	/* user requested sync
410 	sector_t			resync_max;	/* resync should pause
413 	struct kernfs_node		*sysfs_state;	/* handle for 'array_state'
416 	struct kernfs_node		*sysfs_action;  /* handle for 'sync_action' */
418 	struct work_struct del_work;	/* used for delayed sysfs removal */
431 	spinlock_t			lock;
432 	wait_queue_head_t		sb_wait;	/* for waiting on superblock updates */
433 	atomic_t			pending_writes;	/* number of active superblock writes */
435 	unsigned int			safemode;	/* if set, update "clean" superblock
438 	unsigned int			safemode_delay;
439 	struct timer_list		safemode_timer;
440 	struct percpu_ref		writes_pending;
441 	int				sync_checkers;	/* # of threads checking writes_pending */
442 	struct request_queue		*queue;	/* for plugging ... */
444 	struct bitmap			*bitmap; /* the bitmap for the device */
445 	struct {
470 	struct list_head		all_mddevs;  argument
491 	void (*sync_super)(struct mddev *mddev, struct md_rdev *rdev);  argument
492 	struct md_cluster_info		*cluster_info;
493 	unsigned int			good_device_nr;	/* good device num within cluster raid */
518 static inline int __must_check mddev_lock(struct mddev *mddev)  in mddev_lock()
526 static inline void mddev_lock_nointr(struct mddev *mddev)  in mddev_lock_nointr()
531 static inline int mddev_trylock(struct mddev *mddev)  in mddev_trylock()
618 static inline char * mdname (struct mddev * mddev)  in mdname()
623 static inline int sysfs_link_rdev(struct mddev *mddev, struct md_rdev *rdev)  in sysfs_link_rdev()
635 static inline void sysfs_unlink_rdev(struct mddev *mddev, struct md_rdev *rdev)  in sysfs_unlink_rdev()
656 #define rdev_for_each(rdev, mddev)				\  argument
659 #define rdev_for_each_safe(rdev, tmp, mddev)				\  argument
662 #define rdev_for_each_rcu(rdev, mddev)				\  argument
667 	struct mddev		*mddev;  member
758 static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev)  in rdev_dec_pending()
768 static inline int mddev_is_clustered(struct mddev *mddev)  in mddev_is_clustered()
774 static inline void mddev_clear_unsupported_flags(struct mddev *mddev,  in mddev_clear_unsupported_flags()
780 static inline void mddev_check_writesame(struct mddev *mddev, struct bio *bio)  in mddev_check_writesame()
787 static inline void mddev_check_write_zeroes(struct mddev *mddev, struct bio *bio)  in mddev_check_write_zeroes()