52 	struct mddev *mddev;		/* RAID array if running */  member
308 struct mddev {  struct
309 	void				*private;
310 	struct md_personality		*pers;
311 	dev_t				unit;
312 	int				md_minor;
313 	struct list_head		disks;
314 	unsigned long			flags;
315 	unsigned long			sb_flags;
317 	int				suspended;
318 	atomic_t			active_io;
319 	int				ro;
320 	int				sysfs_active; /* set when sysfs deletes
324 	struct gendisk			*gendisk;
326 	struct kobject			kobj;
327 	int				hold_active;
332 	int				major_version,
333 					minor_version,
334 					patch_version;
335 	int				persistent;
336 	int				external;	/* metadata is
338 	char				metadata_type[17]; /* externally set*/
339 	int				chunk_sectors;
340 	time64_t			ctime, utime;
341 	int				level, layout;
342 	char				clevel[16];
343 	int				raid_disks;
344 	int				max_disks;
345 	sector_t			dev_sectors;	/* used size of
347 	sector_t			array_sectors; /* exported array size */
348 	int				external_size; /* size managed
350 	__u64				events;
356 	int				can_decrease_events;
358 	char				uuid[16];
365 	sector_t			reshape_position;
366 	int				delta_disks, new_level, new_layout;
367 	int				new_chunk_sectors;
368 	int				reshape_backwards;
370 	struct md_thread		*thread;	/* management thread */
371 	struct md_thread		*sync_thread;	/* doing resync or reconstruct */
379 	char				*last_sync_action;
380 	sector_t			curr_resync;	/* last block scheduled */
387 	sector_t			curr_resync_completed;
388 	unsigned long			resync_mark;	/* a recent timestamp */
389 	sector_t			resync_mark_cnt;/* blocks written at resync_mark */
390 	sector_t			curr_mark_cnt; /* blocks scheduled now */
392 	sector_t			resync_max_sectors; /* may be set by personality */
394 	atomic64_t			resync_mismatches; /* count of sectors where
399 	sector_t			suspend_lo;
400 	sector_t			suspend_hi;
402 	int				sync_speed_min;
403 	int				sync_speed_max;
406 	int				parallel_resync;
408 	int				ok_start_degraded;
410 	unsigned long			recovery;
416 	int				recovery_disabled;
418 	int				in_sync;	/* know to not need resync */
428 	struct mutex			open_mutex;
429 	struct mutex			reconfig_mutex;
430 	atomic_t			active;		/* general refcount */
431 	atomic_t			openers;	/* number of active opens */
433 	int				changed;	/* True if we might need to
435 	int				degraded;	/* whether md should consider
439 	atomic_t			recovery_active; /* blocks scheduled, but not written */
440 	wait_queue_head_t		recovery_wait;
441 	sector_t			recovery_cp;
442 	sector_t			resync_min;	/* user requested sync
444 	sector_t			resync_max;	/* resync should pause
447 	struct kernfs_node		*sysfs_state;	/* handle for 'array_state'
450 	struct kernfs_node		*sysfs_action;  /* handle for 'sync_action' */
451 	struct kernfs_node		*sysfs_completed;	/*handle for 'sync_completed' */
452 	struct kernfs_node		*sysfs_degraded;	/*handle for 'degraded' */
453 	struct kernfs_node		*sysfs_level;		/*handle for 'level' */
455 	struct work_struct del_work;	/* used for delayed sysfs removal */
468 	spinlock_t			lock;
469 	wait_queue_head_t		sb_wait;	/* for waiting on superblock updates */
470 	atomic_t			pending_writes;	/* number of active superblock writes */
472 	unsigned int			safemode;	/* if set, update "clean" superblock
475 	unsigned int			safemode_delay;
476 	struct timer_list		safemode_timer;
477 	struct percpu_ref		writes_pending;
478 	int				sync_checkers;	/* # of threads checking writes_pending */
479 	struct request_queue		*queue;	/* for plugging ... */
481 	struct bitmap			*bitmap; /* the bitmap for the device */
482 	struct {
507 	struct list_head		all_mddevs;  argument
529 	void (*sync_super)(struct mddev *mddev, struct md_rdev *rdev);  argument
530 	struct md_cluster_info		*cluster_info;
531 	unsigned int			good_device_nr;	/* good device num within cluster raid */
532 	unsigned int			noio_flag; /* for memalloc scope API */
534 	bool	has_superblocks:1;
558 static inline int __must_check mddev_lock(struct mddev *mddev)  in mddev_lock()
566 static inline void mddev_lock_nointr(struct mddev *mddev)  in mddev_lock_nointr()
571 static inline int mddev_trylock(struct mddev *mddev)  in mddev_trylock()
655 static inline char * mdname (struct mddev * mddev)  in mdname()
660 static inline int sysfs_link_rdev(struct mddev *mddev, struct md_rdev *rdev)  in sysfs_link_rdev()
672 static inline void sysfs_unlink_rdev(struct mddev *mddev, struct md_rdev *rdev)  in sysfs_unlink_rdev()
693 #define rdev_for_each(rdev, mddev)				\  argument
696 #define rdev_for_each_safe(rdev, tmp, mddev)				\  argument
699 #define rdev_for_each_rcu(rdev, mddev)				\  argument
704 	struct mddev		*mddev;  member
804 static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev)  in rdev_dec_pending()
814 static inline int mddev_is_clustered(struct mddev *mddev)  in mddev_is_clustered()
820 static inline void mddev_clear_unsupported_flags(struct mddev *mddev,  in mddev_clear_unsupported_flags()
826 static inline void mddev_check_write_zeroes(struct mddev *mddev, struct bio *bio)  in mddev_check_write_zeroes()