Merge branch 'for-linus' of git://neil.brown.name/md

* 'for-linus' of git://neil.brown.name/md: (53 commits)
  md/raid5 revise rules for when to update metadata during reshape
  md/raid5: minor code cleanups in make_request.
  md: remove CONFIG_MD_RAID_RESHAPE config option.
  md/raid5: be more careful about write ordering when reshaping.
  md: don't display meaningless values in sysfs files resync_start and sync_speed
  md/raid5: allow layout and chunksize to be changed on active array.
  md/raid5: reshape using largest of old and new chunk size
  md/raid5: prepare for allowing reshape to change layout
  md/raid5: prepare for allowing reshape to change chunksize.
  md/raid5: clearly differentiate 'before' and 'after' stripes during reshape.
  Documentation/md.txt update
  md: allow number of drives in raid5 to be reduced
  md/raid5: change reshape-progress measurement to cope with reshaping backwards.
  md: add explicit method to signal the end of a reshape.
  md/raid5: enhance raid5_size to work correctly with negative delta_disks
  md/raid5: drop qd_idx from r6_state
  md/raid6: move raid6 data processing to raid6_pq.ko
  md: raid5 run(): Fix max_degraded for raid level 4.
  md: 'array_size' sysfs attribute
  md: centralize ->array_sectors modifications
  ...

1 files changed, 0 insertions, 402 deletions

diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
deleted file mode 100644
index 9743e4dbc918..000000000000
--- a/include/linux/raid/md_k.h
+++ /dev/null
@@ -1,402 +0,0 @@
-/*
-   md_k.h : kernel internal structure of the Linux MD driver
-          Copyright (C) 1996-98 Ingo Molnar, Gadi Oxman
-	  
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
-   
-   You should have received a copy of the GNU General Public License
-   (for example /usr/src/linux/COPYING); if not, write to the Free
-   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  
-*/
-
-#ifndef _MD_K_H
-#define _MD_K_H
-
-/* and dm-bio-list.h is not under include/linux because.... ??? */
-#include "../../../drivers/md/dm-bio-list.h"
-
-#ifdef CONFIG_BLOCK
-
-#define	LEVEL_MULTIPATH		(-4)
-#define	LEVEL_LINEAR		(-1)
-#define	LEVEL_FAULTY		(-5)
-
-/* we need a value for 'no level specified' and 0
- * means 'raid0', so we need something else.  This is
- * for internal use only
- */
-#define	LEVEL_NONE		(-1000000)
-
-#define MaxSector (~(sector_t)0)
-
-typedef struct mddev_s mddev_t;
-typedef struct mdk_rdev_s mdk_rdev_t;
-
-/*
- * options passed in raidrun:
- */
-
-/* Currently this must fit in an 'int' */
-#define MAX_CHUNK_SIZE (1<<30)
-
-/*
- * MD's 'extended' device
- */
-struct mdk_rdev_s
-{
-	struct list_head same_set;	/* RAID devices within the same set */
-
-	sector_t size;			/* Device size (in blocks) */
-	mddev_t *mddev;			/* RAID array if running */
-	long last_events;		/* IO event timestamp */
-
-	struct block_device *bdev;	/* block device handle */
-
-	struct page	*sb_page;
-	int		sb_loaded;
-	__u64		sb_events;
-	sector_t	data_offset;	/* start of data in array */
-	sector_t 	sb_start;	/* offset of the super block (in 512byte sectors) */
-	int		sb_size;	/* bytes in the superblock */
-	int		preferred_minor;	/* autorun support */
-
-	struct kobject	kobj;
-
-	/* A device can be in one of three states based on two flags:
-	 * Not working:   faulty==1 in_sync==0
-	 * Fully working: faulty==0 in_sync==1
-	 * Working, but not
-	 * in sync with array
-	 *                faulty==0 in_sync==0
-	 *
-	 * It can never have faulty==1, in_sync==1
-	 * This reduces the burden of testing multiple flags in many cases
-	 */
-
-	unsigned long	flags;
-#define	Faulty		1		/* device is known to have a fault */
-#define	In_sync		2		/* device is in_sync with rest of array */
-#define	WriteMostly	4		/* Avoid reading if at all possible */
-#define	BarriersNotsupp	5		/* BIO_RW_BARRIER is not supported */
-#define	AllReserved	6		/* If whole device is reserved for
-					 * one array */
-#define	AutoDetected	7		/* added by auto-detect */
-#define Blocked		8		/* An error occured on an externally
-					 * managed array, don't allow writes
-					 * until it is cleared */
-#define StateChanged	9		/* Faulty or Blocked has changed during
-					 * interrupt, so it needs to be
-					 * notified by the thread */
-	wait_queue_head_t blocked_wait;
-
-	int desc_nr;			/* descriptor index in the superblock */
-	int raid_disk;			/* role of device in array */
-	int saved_raid_disk;		/* role that device used to have in the
-					 * array and could again if we did a partial
-					 * resync from the bitmap
-					 */
-	sector_t	recovery_offset;/* If this device has been partially
-					 * recovered, this is where we were
-					 * up to.
-					 */
-
-	atomic_t	nr_pending;	/* number of pending requests.
-					 * only maintained for arrays that
-					 * support hot removal
-					 */
-	atomic_t	read_errors;	/* number of consecutive read errors that
-					 * we have tried to ignore.
-					 */
-	atomic_t	corrected_errors; /* number of corrected read errors,
-					   * for reporting to userspace and storing
-					   * in superblock.
-					   */
-	struct work_struct del_work;	/* used for delayed sysfs removal */
-
-	struct sysfs_dirent *sysfs_state; /* handle for 'state'
-					   * sysfs entry */
-};
-
-struct mddev_s
-{
-	void				*private;
-	struct mdk_personality		*pers;
-	dev_t				unit;
-	int				md_minor;
-	struct list_head 		disks;
-	unsigned long			flags;
-#define MD_CHANGE_DEVS	0	/* Some device status has changed */
-#define MD_CHANGE_CLEAN 1	/* transition to or from 'clean' */
-#define MD_CHANGE_PENDING 2	/* superblock update in progress */
-
-	int				ro;
-
-	struct gendisk			*gendisk;
-
-	struct kobject			kobj;
-	int				hold_active;
-#define	UNTIL_IOCTL	1
-#define	UNTIL_STOP	2
-
-	/* Superblock information */
-	int				major_version,
-					minor_version,
-					patch_version;
-	int				persistent;
-	int 				external;	/* metadata is
-							 * managed externally */
-	char				metadata_type[17]; /* externally set*/
-	int				chunk_size;
-	time_t				ctime, utime;
-	int				level, layout;
-	char				clevel[16];
-	int				raid_disks;
-	int				max_disks;
-	sector_t			size; /* used size of component devices */
-	sector_t			array_sectors; /* exported array size */
-	__u64				events;
-
-	char				uuid[16];
-
-	/* If the array is being reshaped, we need to record the
-	 * new shape and an indication of where we are up to.
-	 * This is written to the superblock.
-	 * If reshape_position is MaxSector, then no reshape is happening (yet).
-	 */
-	sector_t			reshape_position;
-	int				delta_disks, new_level, new_layout, new_chunk;
-
-	struct mdk_thread_s		*thread;	/* management thread */
-	struct mdk_thread_s		*sync_thread;	/* doing resync or reconstruct */
-	sector_t			curr_resync;	/* last block scheduled */
-	unsigned long			resync_mark;	/* a recent timestamp */
-	sector_t			resync_mark_cnt;/* blocks written at resync_mark */
-	sector_t			curr_mark_cnt; /* blocks scheduled now */
-
-	sector_t			resync_max_sectors; /* may be set by personality */
-
-	sector_t			resync_mismatches; /* count of sectors where
-							    * parity/replica mismatch found
-							    */
-
-	/* allow user-space to request suspension of IO to regions of the array */
-	sector_t			suspend_lo;
-	sector_t			suspend_hi;
-	/* if zero, use the system-wide default */
-	int				sync_speed_min;
-	int				sync_speed_max;
-
-	/* resync even though the same disks are shared among md-devices */
-	int				parallel_resync;
-
-	int				ok_start_degraded;
-	/* recovery/resync flags 
-	 * NEEDED:   we might need to start a resync/recover
-	 * RUNNING:  a thread is running, or about to be started
-	 * SYNC:     actually doing a resync, not a recovery
-	 * RECOVER:  doing recovery, or need to try it.
-	 * INTR:     resync needs to be aborted for some reason
-	 * DONE:     thread is done and is waiting to be reaped
-	 * REQUEST:  user-space has requested a sync (used with SYNC)
-	 * CHECK:    user-space request for for check-only, no repair
-	 * RESHAPE:  A reshape is happening
-	 *
-	 * If neither SYNC or RESHAPE are set, then it is a recovery.
-	 */
-#define	MD_RECOVERY_RUNNING	0
-#define	MD_RECOVERY_SYNC	1
-#define	MD_RECOVERY_RECOVER	2
-#define	MD_RECOVERY_INTR	3
-#define	MD_RECOVERY_DONE	4
-#define	MD_RECOVERY_NEEDED	5
-#define	MD_RECOVERY_REQUESTED	6
-#define	MD_RECOVERY_CHECK	7
-#define MD_RECOVERY_RESHAPE	8
-#define	MD_RECOVERY_FROZEN	9
-
-	unsigned long			recovery;
-	int				recovery_disabled; /* if we detect that recovery
-							    * will always fail, set this
-							    * so we don't loop trying */
-
-	int				in_sync;	/* know to not need resync */
-	struct mutex			reconfig_mutex;
-	atomic_t			active;		/* general refcount */
-	atomic_t			openers;	/* number of active opens */
-
-	int				changed;	/* true if we might need to reread partition info */
-	int				degraded;	/* whether md should consider
-							 * adding a spare
-							 */
-	int				barriers_work;	/* initialised to true, cleared as soon
-							 * as a barrier request to slave
-							 * fails.  Only supported
-							 */
-	struct bio			*biolist; 	/* bios that need to be retried
-							 * because BIO_RW_BARRIER is not supported
-							 */
-
-	atomic_t			recovery_active; /* blocks scheduled, but not written */
-	wait_queue_head_t		recovery_wait;
-	sector_t			recovery_cp;
-	sector_t			resync_min;	/* user requested sync
-							 * starts here */
-	sector_t			resync_max;	/* resync should pause
-							 * when it gets here */
-
-	struct sysfs_dirent		*sysfs_state;	/* handle for 'array_state'
-							 * file in sysfs.
-							 */
-	struct sysfs_dirent		*sysfs_action;  /* handle for 'sync_action' */
-
-	struct work_struct del_work;	/* used for delayed sysfs removal */
-
-	spinlock_t			write_lock;
-	wait_queue_head_t		sb_wait;	/* for waiting on superblock updates */
-	atomic_t			pending_writes;	/* number of active superblock writes */
-
-	unsigned int			safemode;	/* if set, update "clean" superblock
-							 * when no writes pending.
-							 */ 
-	unsigned int			safemode_delay;
-	struct timer_list		safemode_timer;
-	atomic_t			writes_pending; 
-	struct request_queue		*queue;	/* for plugging ... */
-
-	atomic_t                        write_behind; /* outstanding async IO */
-	unsigned int                    max_write_behind; /* 0 = sync */
-
-	struct bitmap                   *bitmap; /* the bitmap for the device */
-	struct file			*bitmap_file; /* the bitmap file */
-	long				bitmap_offset; /* offset from superblock of
-							* start of bitmap. May be
-							* negative, but not '0'
-							*/
-	long				default_bitmap_offset; /* this is the offset to use when
-								* hot-adding a bitmap.  It should
-								* eventually be settable by sysfs.
-								*/
-
-	struct list_head		all_mddevs;
-};
-
-
-static inline void rdev_dec_pending(mdk_rdev_t *rdev, mddev_t *mddev)
-{
-	int faulty = test_bit(Faulty, &rdev->flags);
-	if (atomic_dec_and_test(&rdev->nr_pending) && faulty)
-		set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
-}
-
-static inline void md_sync_acct(struct block_device *bdev, unsigned long nr_sectors)
-{
-        atomic_add(nr_sectors, &bdev->bd_contains->bd_disk->sync_io);
-}
-
-struct mdk_personality
-{
-	char *name;
-	int level;
-	struct list_head list;
-	struct module *owner;
-	int (*make_request)(struct request_queue *q, struct bio *bio);
-	int (*run)(mddev_t *mddev);
-	int (*stop)(mddev_t *mddev);
-	void (*status)(struct seq_file *seq, mddev_t *mddev);
-	/* error_handler must set ->faulty and clear ->in_sync
-	 * if appropriate, and should abort recovery if needed 
-	 */
-	void (*error_handler)(mddev_t *mddev, mdk_rdev_t *rdev);
-	int (*hot_add_disk) (mddev_t *mddev, mdk_rdev_t *rdev);
-	int (*hot_remove_disk) (mddev_t *mddev, int number);
-	int (*spare_active) (mddev_t *mddev);
-	sector_t (*sync_request)(mddev_t *mddev, sector_t sector_nr, int *skipped, int go_faster);
-	int (*resize) (mddev_t *mddev, sector_t sectors);
-	int (*check_reshape) (mddev_t *mddev);
-	int (*start_reshape) (mddev_t *mddev);
-	int (*reconfig) (mddev_t *mddev, int layout, int chunk_size);
-	/* quiesce moves between quiescence states
-	 * 0 - fully active
-	 * 1 - no new requests allowed
-	 * others - reserved
-	 */
-	void (*quiesce) (mddev_t *mddev, int state);
-};
-
-
-struct md_sysfs_entry {
-	struct attribute attr;
-	ssize_t (*show)(mddev_t *, char *);
-	ssize_t (*store)(mddev_t *, const char *, size_t);
-};
-
-
-static inline char * mdname (mddev_t * mddev)
-{
-	return mddev->gendisk ? mddev->gendisk->disk_name : "mdX";
-}
-
-/*
- * iterates through some rdev ringlist. It's safe to remove the
- * current 'rdev'. Dont touch 'tmp' though.
- */
-#define rdev_for_each_list(rdev, tmp, head)				\
-	list_for_each_entry_safe(rdev, tmp, head, same_set)
-
-/*
- * iterates through the 'same array disks' ringlist
- */
-#define rdev_for_each(rdev, tmp, mddev)				\
-	list_for_each_entry_safe(rdev, tmp, &((mddev)->disks), same_set)
-
-#define rdev_for_each_rcu(rdev, mddev)				\
-	list_for_each_entry_rcu(rdev, &((mddev)->disks), same_set)
-
-typedef struct mdk_thread_s {
-	void			(*run) (mddev_t *mddev);
-	mddev_t			*mddev;
-	wait_queue_head_t	wqueue;
-	unsigned long           flags;
-	struct task_struct	*tsk;
-	unsigned long		timeout;
-} mdk_thread_t;
-
-#define THREAD_WAKEUP  0
-
-#define __wait_event_lock_irq(wq, condition, lock, cmd) 		\
-do {									\
-	wait_queue_t __wait;						\
-	init_waitqueue_entry(&__wait, current);				\
-									\
-	add_wait_queue(&wq, &__wait);					\
-	for (;;) {							\
-		set_current_state(TASK_UNINTERRUPTIBLE);		\
-		if (condition)						\
-			break;						\
-		spin_unlock_irq(&lock);					\
-		cmd;							\
-		schedule();						\
-		spin_lock_irq(&lock);					\
-	}								\
-	current->state = TASK_RUNNING;					\
-	remove_wait_queue(&wq, &__wait);				\
-} while (0)
-
-#define wait_event_lock_irq(wq, condition, lock, cmd) 			\
-do {									\
-	if (condition)	 						\
-		break;							\
-	__wait_event_lock_irq(wq, condition, lock, cmd);		\
-} while (0)
-
-static inline void safe_put_page(struct page *p)
-{
-	if (p) put_page(p);
-}
-
-#endif /* CONFIG_BLOCK */
-#endif
-