134 	struct mddev *mddev;		/* RAID array if running */  member
390 struct mddev {  struct
391 	void				*private;
392 	struct md_personality		*pers;
393 	dev_t				unit;
394 	int				md_minor;
395 	struct list_head		disks;
396 	unsigned long			flags;
397 	unsigned long			sb_flags;
399 	int				suspended;
400 	struct mutex			suspend_mutex;
401 	struct percpu_ref		active_io;
402 	int				ro;
403 	int				sysfs_active; /* set when sysfs deletes
407 	struct gendisk			*gendisk;
409 	struct kobject			kobj;
410 	int				hold_active;
415 	int				major_version,
416 					minor_version,
417 					patch_version;
418 	int				persistent;
419 	int				external;	/* metadata is
421 	char				metadata_type[17]; /* externally set*/
422 	int				chunk_sectors;
423 	time64_t			ctime, utime;
424 	int				level, layout;
425 	char				clevel[16];
426 	int				raid_disks;
427 	int				max_disks;
428 	sector_t			dev_sectors;	/* used size of
430 	sector_t			array_sectors; /* exported array size */
431 	int				external_size; /* size managed
433 	__u64				events;
439 	int				can_decrease_events;
441 	char				uuid[16];
448 	sector_t			reshape_position;
449 	int				delta_disks, new_level, new_layout;
450 	int				new_chunk_sectors;
451 	int				reshape_backwards;
453 	struct md_thread __rcu		*thread;	/* management thread */
454 	struct md_thread __rcu		*sync_thread;	/* doing resync or reconstruct */
461 	enum sync_action		last_sync_action;
462 	sector_t			curr_resync;	/* last block scheduled */
469 	sector_t			curr_resync_completed;
470 	unsigned long			resync_mark;	/* a recent timestamp */
471 	sector_t			resync_mark_cnt;/* blocks written at resync_mark */
472 	sector_t			curr_mark_cnt; /* blocks scheduled now */
474 	sector_t			resync_max_sectors; /* may be set by personality */
476 	atomic64_t			resync_mismatches; /* count of sectors where
481 	sector_t			suspend_lo;
482 	sector_t			suspend_hi;
484 	int				sync_speed_min;
485 	int				sync_speed_max;
488 	int				parallel_resync;
490 	int				ok_start_degraded;
492 	unsigned long			recovery;
498 	int				recovery_disabled;
500 	int				in_sync;	/* know to not need resync */
510 	struct mutex			open_mutex;
511 	struct mutex			reconfig_mutex;
512 	atomic_t			active;		/* general refcount */
513 	atomic_t			openers;	/* number of active opens */
515 	int				changed;	/* True if we might need to
517 	int				degraded;	/* whether md should consider
521 	atomic_t			recovery_active; /* blocks scheduled, but not written */
522 	wait_queue_head_t		recovery_wait;
523 	sector_t			recovery_cp;
524 	sector_t			resync_min;	/* user requested sync
526 	sector_t			resync_max;	/* resync should pause
529 	struct kernfs_node		*sysfs_state;	/* handle for 'array_state'
532 	struct kernfs_node		*sysfs_action;  /* handle for 'sync_action' */
533 	struct kernfs_node		*sysfs_completed;	/*handle for 'sync_completed' */
534 	struct kernfs_node		*sysfs_degraded;	/*handle for 'degraded' */
535 	struct kernfs_node		*sysfs_level;		/*handle for 'level' */
538 	struct work_struct del_work;
540 	struct work_struct sync_work;
553 	spinlock_t			lock;
554 	wait_queue_head_t		sb_wait;	/* for waiting on superblock updates */
555 	atomic_t			pending_writes;	/* number of active superblock writes */
557 	unsigned int			safemode;	/* if set, update "clean" superblock
560 	unsigned int			safemode_delay;
561 	struct timer_list		safemode_timer;
562 	struct percpu_ref		writes_pending;
563 	int				sync_checkers;	/* # of threads checking writes_pending */
565 	void				*bitmap; /* the bitmap for the device */
566 	struct bitmap_operations	*bitmap_ops;
567 	struct {
592 	struct list_head		all_mddevs;  argument
604 	void (*sync_super)(struct mddev *mddev, struct md_rdev *rdev);  argument
605 	struct md_cluster_info		*cluster_info;
606 	struct md_cluster_operations *cluster_ops;
607 	unsigned int			good_device_nr;	/* good device num within cluster raid */
608 	unsigned int			noio_flag; /* for memalloc scope API */
614 	struct list_head		deleting;
617 	atomic_t sync_seq;
619 	bool	has_superblocks:1;
620 	bool	fail_last_dev:1;
621 	bool	serialize_policy:1;
674 static inline bool md_is_rdwr(struct mddev *mddev)  in md_is_rdwr()
679 static inline bool reshape_interrupted(struct mddev *mddev)  in reshape_interrupted()
698 static inline int __must_check mddev_lock(struct mddev *mddev)  in mddev_lock()
706 static inline void mddev_lock_nointr(struct mddev *mddev)  in mddev_lock_nointr()
711 static inline int mddev_trylock(struct mddev *mddev)  in mddev_trylock()
799 static inline char * mdname (struct mddev * mddev)  in mdname()
804 static inline int sysfs_link_rdev(struct mddev *mddev, struct md_rdev *rdev)  in sysfs_link_rdev()
816 static inline void sysfs_unlink_rdev(struct mddev *mddev, struct md_rdev *rdev)  in sysfs_unlink_rdev()
837 #define rdev_for_each(rdev, mddev)				\  argument
840 #define rdev_for_each_safe(rdev, tmp, mddev)				\  argument
843 #define rdev_for_each_rcu(rdev, mddev)				\  argument
848 	struct mddev		*mddev;  member
857 	struct mddev	*mddev;  member
943 static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev)  in rdev_dec_pending()
952 static inline int mddev_is_clustered(struct mddev *mddev)  in mddev_is_clustered()
958 static inline void mddev_clear_unsupported_flags(struct mddev *mddev,  in mddev_clear_unsupported_flags()
964 static inline void mddev_check_write_zeroes(struct mddev *mddev, struct bio *bio)  in mddev_check_write_zeroes()
971 static inline int mddev_suspend_and_lock(struct mddev *mddev)  in mddev_suspend_and_lock()
986 static inline void mddev_suspend_and_lock_nointr(struct mddev *mddev)  in mddev_suspend_and_lock_nointr()
992 static inline void mddev_unlock_and_resume(struct mddev *mddev)  in mddev_unlock_and_resume()
1018 static inline bool mddev_is_dm(struct mddev *mddev)  in mddev_is_dm()
1023 static inline void mddev_trace_remap(struct mddev *mddev, struct bio *bio,  in mddev_trace_remap()
1054 #define mddev_add_trace_msg(mddev, fmt, args...)			\  argument