52 	struct mddev *mddev;		/* RAID array if running */  member
283 struct mddev {  struct
284 	void				*private;
285 	struct md_personality		*pers;
286 	dev_t				unit;
287 	int				md_minor;
288 	struct list_head		disks;
289 	unsigned long			flags;
290 	unsigned long			sb_flags;
292 	int				suspended;
293 	atomic_t			active_io;
294 	int				ro;
295 	int				sysfs_active; /* set when sysfs deletes
299 	struct gendisk			*gendisk;
301 	struct kobject			kobj;
302 	int				hold_active;
307 	int				major_version,
308 					minor_version,
309 					patch_version;
310 	int				persistent;
311 	int				external;	/* metadata is
313 	char				metadata_type[17]; /* externally set*/
314 	int				chunk_sectors;
315 	time64_t			ctime, utime;
316 	int				level, layout;
317 	char				clevel[16];
318 	int				raid_disks;
319 	int				max_disks;
320 	sector_t			dev_sectors;	/* used size of
322 	sector_t			array_sectors; /* exported array size */
323 	int				external_size; /* size managed
325 	__u64				events;
331 	int				can_decrease_events;
333 	char				uuid[16];
340 	sector_t			reshape_position;
341 	int				delta_disks, new_level, new_layout;
342 	int				new_chunk_sectors;
343 	int				reshape_backwards;
345 	struct md_thread		*thread;	/* management thread */
346 	struct md_thread		*sync_thread;	/* doing resync or reconstruct */
354 	char				*last_sync_action;
355 	sector_t			curr_resync;	/* last block scheduled */
362 	sector_t			curr_resync_completed;
363 	unsigned long			resync_mark;	/* a recent timestamp */
364 	sector_t			resync_mark_cnt;/* blocks written at resync_mark */
365 	sector_t			curr_mark_cnt; /* blocks scheduled now */
367 	sector_t			resync_max_sectors; /* may be set by personality */
369 	atomic64_t			resync_mismatches; /* count of sectors where
374 	sector_t			suspend_lo;
375 	sector_t			suspend_hi;
377 	int				sync_speed_min;
378 	int				sync_speed_max;
381 	int				parallel_resync;
383 	int				ok_start_degraded;
385 	unsigned long			recovery;
391 	int				recovery_disabled;
393 	int				in_sync;	/* know to not need resync */
403 	struct mutex			open_mutex;
404 	struct mutex			reconfig_mutex;
405 	atomic_t			active;		/* general refcount */
406 	atomic_t			openers;	/* number of active opens */
408 	int				changed;	/* True if we might need to
410 	int				degraded;	/* whether md should consider
414 	atomic_t			recovery_active; /* blocks scheduled, but not written */
415 	wait_queue_head_t		recovery_wait;
416 	sector_t			recovery_cp;
417 	sector_t			resync_min;	/* user requested sync
419 	sector_t			resync_max;	/* resync should pause
422 	struct kernfs_node		*sysfs_state;	/* handle for 'array_state'
425 	struct kernfs_node		*sysfs_action;  /* handle for 'sync_action' */
426 	struct kernfs_node		*sysfs_completed;	/*handle for 'sync_completed' */
427 	struct kernfs_node		*sysfs_degraded;	/*handle for 'degraded' */
428 	struct kernfs_node		*sysfs_level;		/*handle for 'level' */
430 	struct work_struct del_work;	/* used for delayed sysfs removal */
443 	spinlock_t			lock;
444 	wait_queue_head_t		sb_wait;	/* for waiting on superblock updates */
445 	atomic_t			pending_writes;	/* number of active superblock writes */
447 	unsigned int			safemode;	/* if set, update "clean" superblock
450 	unsigned int			safemode_delay;
451 	struct timer_list		safemode_timer;
452 	struct percpu_ref		writes_pending;
453 	int				sync_checkers;	/* # of threads checking writes_pending */
454 	struct request_queue		*queue;	/* for plugging ... */
456 	struct bitmap			*bitmap; /* the bitmap for the device */
457 	struct {
482 	struct list_head		all_mddevs;  argument
503 	void (*sync_super)(struct mddev *mddev, struct md_rdev *rdev);  argument
504 	struct md_cluster_info		*cluster_info;
505 	unsigned int			good_device_nr;	/* good device num within cluster raid */
506 	unsigned int			noio_flag; /* for memalloc scope API */
508 	bool	has_superblocks:1;
532 static inline int __must_check mddev_lock(struct mddev *mddev)  in mddev_lock()
540 static inline void mddev_lock_nointr(struct mddev *mddev)  in mddev_lock_nointr()
545 static inline int mddev_trylock(struct mddev *mddev)  in mddev_trylock()
629 static inline char * mdname (struct mddev * mddev)  in mdname()
634 static inline int sysfs_link_rdev(struct mddev *mddev, struct md_rdev *rdev)  in sysfs_link_rdev()
646 static inline void sysfs_unlink_rdev(struct mddev *mddev, struct md_rdev *rdev)  in sysfs_unlink_rdev()
667 #define rdev_for_each(rdev, mddev)				\  argument
670 #define rdev_for_each_safe(rdev, tmp, mddev)				\  argument
673 #define rdev_for_each_rcu(rdev, mddev)				\  argument
678 	struct mddev		*mddev;  member
770 static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev)  in rdev_dec_pending()
780 static inline int mddev_is_clustered(struct mddev *mddev)  in mddev_is_clustered()
786 static inline void mddev_clear_unsupported_flags(struct mddev *mddev,  in mddev_clear_unsupported_flags()
792 static inline void mddev_check_writesame(struct mddev *mddev, struct bio *bio)  in mddev_check_writesame()
799 static inline void mddev_check_write_zeroes(struct mddev *mddev, struct bio *bio)  in mddev_check_write_zeroes()