108 	struct mddev *mddev;		/* RAID array if running */  member
363 struct mddev {  struct
364 	void				*private;
365 	struct md_personality		*pers;
366 	dev_t				unit;
367 	int				md_minor;
368 	struct list_head		disks;
369 	unsigned long			flags;
370 	unsigned long			sb_flags;
372 	int				suspended;
373 	struct mutex			suspend_mutex;
374 	struct percpu_ref		active_io;
375 	int				ro;
376 	int				sysfs_active; /* set when sysfs deletes
380 	struct gendisk			*gendisk;
382 	struct kobject			kobj;
383 	int				hold_active;
388 	int				major_version,
389 					minor_version,
390 					patch_version;
391 	int				persistent;
392 	int				external;	/* metadata is
394 	char				metadata_type[17]; /* externally set*/
395 	int				chunk_sectors;
396 	time64_t			ctime, utime;
397 	int				level, layout;
398 	char				clevel[16];
399 	int				raid_disks;
400 	int				max_disks;
401 	sector_t			dev_sectors;	/* used size of
403 	sector_t			array_sectors; /* exported array size */
404 	int				external_size; /* size managed
406 	__u64				events;
412 	int				can_decrease_events;
414 	char				uuid[16];
421 	sector_t			reshape_position;
422 	int				delta_disks, new_level, new_layout;
423 	int				new_chunk_sectors;
424 	int				reshape_backwards;
426 	struct md_thread __rcu		*thread;	/* management thread */
427 	struct md_thread __rcu		*sync_thread;	/* doing resync or reconstruct */
434 	enum sync_action		last_sync_action;
435 	sector_t			curr_resync;	/* last block scheduled */
442 	sector_t			curr_resync_completed;
443 	unsigned long			resync_mark;	/* a recent timestamp */
444 	sector_t			resync_mark_cnt;/* blocks written at resync_mark */
445 	sector_t			curr_mark_cnt; /* blocks scheduled now */
447 	sector_t			resync_max_sectors; /* may be set by personality */
449 	atomic64_t			resync_mismatches; /* count of sectors where
454 	sector_t			suspend_lo;
455 	sector_t			suspend_hi;
457 	int				sync_speed_min;
458 	int				sync_speed_max;
461 	int				parallel_resync;
463 	int				ok_start_degraded;
465 	unsigned long			recovery;
471 	int				recovery_disabled;
473 	int				in_sync;	/* know to not need resync */
483 	struct mutex			open_mutex;
484 	struct mutex			reconfig_mutex;
485 	atomic_t			active;		/* general refcount */
486 	atomic_t			openers;	/* number of active opens */
488 	int				changed;	/* True if we might need to
490 	int				degraded;	/* whether md should consider
494 	atomic_t			recovery_active; /* blocks scheduled, but not written */
495 	wait_queue_head_t		recovery_wait;
496 	sector_t			recovery_cp;
497 	sector_t			resync_min;	/* user requested sync
499 	sector_t			resync_max;	/* resync should pause
502 	struct kernfs_node		*sysfs_state;	/* handle for 'array_state'
505 	struct kernfs_node		*sysfs_action;  /* handle for 'sync_action' */
506 	struct kernfs_node		*sysfs_completed;	/*handle for 'sync_completed' */
507 	struct kernfs_node		*sysfs_degraded;	/*handle for 'degraded' */
508 	struct kernfs_node		*sysfs_level;		/*handle for 'level' */
511 	struct work_struct del_work;
513 	struct work_struct sync_work;
526 	spinlock_t			lock;
527 	wait_queue_head_t		sb_wait;	/* for waiting on superblock updates */
528 	atomic_t			pending_writes;	/* number of active superblock writes */
530 	unsigned int			safemode;	/* if set, update "clean" superblock
533 	unsigned int			safemode_delay;
534 	struct timer_list		safemode_timer;
535 	struct percpu_ref		writes_pending;
536 	int				sync_checkers;	/* # of threads checking writes_pending */
538 	void				*bitmap; /* the bitmap for the device */
539 	struct bitmap_operations	*bitmap_ops;
540 	struct {
565 	struct list_head		all_mddevs;  argument
577 	void (*sync_super)(struct mddev *mddev, struct md_rdev *rdev);  argument
578 	struct md_cluster_info		*cluster_info;
579 	unsigned int			good_device_nr;	/* good device num within cluster raid */
580 	unsigned int			noio_flag; /* for memalloc scope API */
586 	struct list_head		deleting;
589 	atomic_t sync_seq;
591 	bool	has_superblocks:1;
592 	bool	fail_last_dev:1;
593 	bool	serialize_policy:1;
646 static inline bool md_is_rdwr(struct mddev *mddev)  in md_is_rdwr()
651 static inline bool reshape_interrupted(struct mddev *mddev)  in reshape_interrupted()
670 static inline int __must_check mddev_lock(struct mddev *mddev)  in mddev_lock()
678 static inline void mddev_lock_nointr(struct mddev *mddev)  in mddev_lock_nointr()
683 static inline int mddev_trylock(struct mddev *mddev)  in mddev_trylock()
773 static inline char * mdname (struct mddev * mddev)  in mdname()
778 static inline int sysfs_link_rdev(struct mddev *mddev, struct md_rdev *rdev)  in sysfs_link_rdev()
790 static inline void sysfs_unlink_rdev(struct mddev *mddev, struct md_rdev *rdev)  in sysfs_unlink_rdev()
811 #define rdev_for_each(rdev, mddev)				\  argument
814 #define rdev_for_each_safe(rdev, tmp, mddev)				\  argument
817 #define rdev_for_each_rcu(rdev, mddev)				\  argument
822 	struct mddev		*mddev;  member
831 	struct mddev	*mddev;  member
922 static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev)  in rdev_dec_pending()
932 static inline int mddev_is_clustered(struct mddev *mddev)  in mddev_is_clustered()
938 static inline void mddev_clear_unsupported_flags(struct mddev *mddev,  in mddev_clear_unsupported_flags()
944 static inline void mddev_check_write_zeroes(struct mddev *mddev, struct bio *bio)  in mddev_check_write_zeroes()
951 static inline int mddev_suspend_and_lock(struct mddev *mddev)  in mddev_suspend_and_lock()
966 static inline void mddev_suspend_and_lock_nointr(struct mddev *mddev)  in mddev_suspend_and_lock_nointr()
972 static inline void mddev_unlock_and_resume(struct mddev *mddev)  in mddev_unlock_and_resume()
998 static inline bool mddev_is_dm(struct mddev *mddev)  in mddev_is_dm()
1003 static inline void mddev_trace_remap(struct mddev *mddev, struct bio *bio,  in mddev_trace_remap()
1034 #define mddev_add_trace_msg(mddev, fmt, args...)			\  argument