md.c File Reference

#include <linux/kthread.h>
#include <linux/blkdev.h>
#include <linux/sysctl.h>
#include <linux/seq_file.h>
#include <linux/fs.h>
#include <linux/poll.h>
#include <linux/ctype.h>
#include <linux/string.h>
#include <linux/hdreg.h>
#include <linux/proc_fs.h>
#include <linux/random.h>
#include <linux/module.h>
#include <linux/reboot.h>
#include <linux/file.h>
#include <linux/compat.h>
#include <linux/delay.h>
#include <linux/raid/md_p.h>
#include <linux/raid/md_u.h>
#include <linux/slab.h>
#include "md.h"
#include "bitmap.h"

Go to the source code of this file.

Data Structures
struct	super_type
struct	rdev_sysfs_entry
struct	detected_devices_node

Macros
#define	MD_BUG(x...)   { printk("md: bug in file %s, line %d\n", __FILE__, __LINE__); md_print_devices(); }
#define	MD_DEFAULT_MAX_CORRECTED_READ_ERRORS   20
#define	for_each_mddev(_mddev, _tmp)
#define	SYNC_MARKS   10
#define	SYNC_MARK_STEP   (3*HZ)
#define	DO_DEBUG   1

Enumerations
enum	array_state {   clear, inactive, suspended, readonly,   read_auto, clean, active, write_pending,   active_idle, bad_word }

Functions
struct bio *	bio_alloc_mddev (gfp_t gfp_mask, int nr_iovecs, struct mddev *mddev)
	EXPORT_SYMBOL_GPL (bio_alloc_mddev)
struct bio *	bio_clone_mddev (struct bio *bio, gfp_t gfp_mask, struct mddev *mddev)
	EXPORT_SYMBOL_GPL (bio_clone_mddev)
void	md_trim_bio (struct bio *bio, int offset, int size)
	EXPORT_SYMBOL_GPL (md_trim_bio)
void	md_new_event (struct mddev *mddev)
	EXPORT_SYMBOL_GPL (md_new_event)
void	mddev_suspend (struct mddev *mddev)
	EXPORT_SYMBOL_GPL (mddev_suspend)
void	mddev_resume (struct mddev *mddev)
	EXPORT_SYMBOL_GPL (mddev_resume)
int	mddev_congested (struct mddev *mddev, int bits)
	EXPORT_SYMBOL (mddev_congested)
void	md_flush_request (struct mddev *mddev, struct bio *bio)
	EXPORT_SYMBOL (md_flush_request)
void	md_unplug (struct blk_plug_cb *cb, bool from_schedule)
	EXPORT_SYMBOL (md_unplug)
void	mddev_init (struct mddev *mddev)
	EXPORT_SYMBOL_GPL (mddev_init)
void	md_rdev_clear (struct md_rdev *rdev)
	EXPORT_SYMBOL_GPL (md_rdev_clear)
void	md_super_write (struct mddev *mddev, struct md_rdev *rdev, sector_t sector, int size, struct page *page)
void	md_super_wait (struct mddev *mddev)
int	sync_page_io (struct md_rdev *rdev, sector_t sector, int size, struct page *page, int rw, bool metadata_op)
	EXPORT_SYMBOL_GPL (sync_page_io)
int	md_check_no_bitmap (struct mddev *mddev)
	EXPORT_SYMBOL (md_check_no_bitmap)
int	md_integrity_register (struct mddev *mddev)
	EXPORT_SYMBOL (md_integrity_register)
void	md_integrity_add_rdev (struct md_rdev *rdev, struct mddev *mddev)
	EXPORT_SYMBOL (md_integrity_add_rdev)
void	md_autodetect_dev (dev_t dev)
int	md_rdev_init (struct md_rdev *rdev)
	EXPORT_SYMBOL_GPL (md_rdev_init)
int	strict_strtoul_scaled (const char *cp, unsigned long *res, int scale)
int	md_run (struct mddev *mddev)
	EXPORT_SYMBOL_GPL (md_run)
void	restore_bitmap_write_access (struct file *file)
void	md_stop_writes (struct mddev *mddev)
	EXPORT_SYMBOL_GPL (md_stop_writes)
void	md_stop (struct mddev *mddev)
	EXPORT_SYMBOL_GPL (md_stop)
void	md_set_array_sectors (struct mddev *mddev, sector_t array_sectors)
	EXPORT_SYMBOL (md_set_array_sectors)
void	md_wakeup_thread (struct md_thread *thread)
struct md_thread *	md_register_thread (void(*run)(struct md_thread *), struct mddev *mddev, const char *name)
void	md_unregister_thread (struct md_thread **threadp)
void	md_error (struct mddev *mddev, struct md_rdev *rdev)
int	register_md_personality (struct md_personality *p)
int	unregister_md_personality (struct md_personality *p)
void	md_done_sync (struct mddev *mddev, int blocks, int ok)
void	md_write_start (struct mddev *mddev, struct bio *bi)
void	md_write_end (struct mddev *mddev)
int	md_allow_write (struct mddev *mddev)
	EXPORT_SYMBOL_GPL (md_allow_write)
void	md_do_sync (struct md_thread *thread)
	EXPORT_SYMBOL_GPL (md_do_sync)
void	md_check_recovery (struct mddev *mddev)
void	md_wait_for_blocked_rdev (struct md_rdev *rdev, struct mddev *mddev)
	EXPORT_SYMBOL (md_wait_for_blocked_rdev)
void	md_finish_reshape (struct mddev *mddev)
	EXPORT_SYMBOL (md_finish_reshape)
int	md_is_badblock (struct badblocks *bb, sector_t s, int sectors, sector_t *first_bad, int *bad_sectors)
	EXPORT_SYMBOL_GPL (md_is_badblock)
int	rdev_set_badblocks (struct md_rdev *rdev, sector_t s, int sectors, int is_new)
	EXPORT_SYMBOL_GPL (rdev_set_badblocks)
int	rdev_clear_badblocks (struct md_rdev *rdev, sector_t s, int sectors, int is_new)
	EXPORT_SYMBOL_GPL (rdev_clear_badblocks)
void	md_ack_all_badblocks (struct badblocks *bb)
	EXPORT_SYMBOL_GPL (md_ack_all_badblocks)
	subsys_initcall (md_init)
	module_exit (md_exit)
	module_param_call (start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR)
	module_param (start_dirty_degraded, int, S_IRUGO|S_IWUSR)
	module_param_call (new_array, add_named_array, NULL, NULL, S_IWUSR)
	EXPORT_SYMBOL (register_md_personality)
	EXPORT_SYMBOL (unregister_md_personality)
	EXPORT_SYMBOL (md_error)
	EXPORT_SYMBOL (md_done_sync)
	EXPORT_SYMBOL (md_write_start)
	EXPORT_SYMBOL (md_write_end)
	EXPORT_SYMBOL (md_register_thread)
	EXPORT_SYMBOL (md_unregister_thread)
	EXPORT_SYMBOL (md_wakeup_thread)
	EXPORT_SYMBOL (md_check_recovery)
	MODULE_LICENSE ("GPL")
	MODULE_DESCRIPTION ("MD RAID framework")
	MODULE_ALIAS ("md")
	MODULE_ALIAS_BLOCKDEV_MAJOR (MD_MAJOR)

Variables
int	mdp_major = 0

Macro Definition Documentation

#define DO_DEBUG   1

Definition at line 8374 of file md.c.

#define for_each_mddev	(		_mddev,
			_tmp
	)

Value:

\
    for (({ spin_lock(&all_mddevs_lock);                \
        _tmp = all_mddevs.next;                 \
        _mddev = NULL;});                   \
         ({ if (_tmp != &all_mddevs)                \
            mddev_get(list_entry(_tmp, struct mddev, all_mddevs));\
        spin_unlock(&all_mddevs_lock);              \
        if (_mddev) mddev_put(_mddev);              \
        _mddev = list_entry(_tmp, struct mddev, all_mddevs);    \
        _tmp != &all_mddevs;});                 \
         ({ spin_lock(&all_mddevs_lock);                \
        _tmp = _tmp->next;})                    \
        )

Definition at line 275 of file md.c.

#define MD_BUG

(

x...

)

{ printk("md: bug in file %s, line %d\n", __FILE__, __LINE__); md_print_devices(); }

Definition at line 75 of file md.c.

#define MD_DEFAULT_MAX_CORRECTED_READ_ERRORS   20

Definition at line 82 of file md.c.

#define SYNC_MARK_STEP   (3*HZ)

Definition at line 7283 of file md.c.

#define SYNC_MARKS   10

Definition at line 7282 of file md.c.

Enumeration Type Documentation

enum array_state

Enumerator:

clear
inactive
suspended
readonly
read_auto
clean
active
write_pending
active_idle
bad_word

Definition at line 3828 of file md.c.

Function Documentation

struct bio* bio_alloc_mddev ( gfp_t  gfp_mask, int  nr_iovecs, struct mddev *  mddev  )

read

Definition at line 158 of file md.c.

struct bio* bio_clone_mddev ( struct bio *  bio, gfp_t  gfp_mask, struct mddev *  mddev  )

read

Definition at line 173 of file md.c.

EXPORT_SYMBOL

(

mddev_congested

)

EXPORT_SYMBOL

(

md_flush_request

)

EXPORT_SYMBOL

(

md_unplug

)

EXPORT_SYMBOL

(

md_check_no_bitmap

)

EXPORT_SYMBOL

(

md_integrity_register

)

EXPORT_SYMBOL

(

md_integrity_add_rdev

)

EXPORT_SYMBOL

(

md_set_array_sectors

)

EXPORT_SYMBOL

(

md_wait_for_blocked_rdev

)

EXPORT_SYMBOL

(

md_finish_reshape

)

EXPORT_SYMBOL

(

register_md_personality

)

EXPORT_SYMBOL

(

unregister_md_personality

)

EXPORT_SYMBOL

(

md_error

)

EXPORT_SYMBOL

(

md_done_sync

)

EXPORT_SYMBOL

(

md_write_start

)

EXPORT_SYMBOL

(

md_write_end

)

EXPORT_SYMBOL

(

md_register_thread

)

EXPORT_SYMBOL

(

md_unregister_thread

)

EXPORT_SYMBOL

(

md_wakeup_thread

)

EXPORT_SYMBOL

(

md_check_recovery

)

EXPORT_SYMBOL_GPL

(

bio_alloc_mddev

)

EXPORT_SYMBOL_GPL

(

bio_clone_mddev

)

EXPORT_SYMBOL_GPL

(

md_trim_bio

)

EXPORT_SYMBOL_GPL

(

md_new_event

)

EXPORT_SYMBOL_GPL

(

mddev_suspend

)

EXPORT_SYMBOL_GPL

(

mddev_resume

)

EXPORT_SYMBOL_GPL

(

mddev_init

)

EXPORT_SYMBOL_GPL

(

md_rdev_clear

)

EXPORT_SYMBOL_GPL

(

sync_page_io

)

EXPORT_SYMBOL_GPL

(

md_rdev_init

)

EXPORT_SYMBOL_GPL

(

md_run

)

EXPORT_SYMBOL_GPL

(

md_stop_writes

)

EXPORT_SYMBOL_GPL

(

md_stop

)

EXPORT_SYMBOL_GPL

(

md_allow_write

)

EXPORT_SYMBOL_GPL

(

md_do_sync

)

EXPORT_SYMBOL_GPL

(

md_is_badblock

)

EXPORT_SYMBOL_GPL

(

rdev_set_badblocks

)

EXPORT_SYMBOL_GPL

(

rdev_clear_badblocks

)

EXPORT_SYMBOL_GPL

(

md_ack_all_badblocks

)

void md_ack_all_badblocks

(

struct badblocks *

bb

)

Definition at line 8300 of file md.c.

int md_allow_write

(

struct mddev *

mddev

)

Definition at line 7252 of file md.c.

void md_autodetect_dev

(

dev_t

dev

)

Definition at line 8511 of file md.c.

int md_check_no_bitmap

(

struct mddev *

mddev

)

Definition at line 1002 of file md.c.

void md_check_recovery

(

struct mddev *

mddev

)

Definition at line 7734 of file md.c.

void md_do_sync

(

struct md_thread *

thread

)

Definition at line 7284 of file md.c.

void md_done_sync	(	struct mddev *	mddev,
		int	blocks,
		int	ok
	)

Definition at line 7180 of file md.c.

void md_error	(	struct mddev *	mddev,
		struct md_rdev *	rdev
	)

Definition at line 6772 of file md.c.

void md_finish_reshape

(

struct mddev *

mddev

)

Definition at line 7906 of file md.c.

void md_flush_request	(	struct mddev *	mddev,
		struct bio *	bio
	)

Definition at line 450 of file md.c.

void md_integrity_add_rdev	(	struct md_rdev *	rdev,
		struct mddev *	mddev
	)

Definition at line 2045 of file md.c.

int md_integrity_register

(

struct mddev *

mddev

)

Definition at line 1998 of file md.c.

int md_is_badblock	(	struct badblocks *	bb,
		sector_t	s,
		int	sectors,
		sector_t *	first_bad,
		int *	bad_sectors
	)

Definition at line 7947 of file md.c.

void md_new_event

(

struct mddev *

mddev

)

Definition at line 244 of file md.c.

void md_rdev_clear

(

struct md_rdev *

rdev

)

Definition at line 743 of file md.c.

int md_rdev_init

(

struct md_rdev *

rdev

)

Definition at line 3193 of file md.c.

struct md_thread* md_register_thread ( void(*)(struct md_thread *)  run, struct mddev *  mddev, const char *  name  )

read

Definition at line 6730 of file md.c.

int md_run

(

struct mddev *

mddev

)

Definition at line 4947 of file md.c.

void md_set_array_sectors	(	struct mddev *	mddev,
		sector_t	array_sectors
	)

Definition at line 6105 of file md.c.

void md_stop

(

struct mddev *

mddev

)

Definition at line 5308 of file md.c.

void md_stop_writes

(

struct mddev *

mddev

)

Definition at line 5289 of file md.c.

void md_super_wait

(

struct mddev *

mddev

)

Definition at line 799 of file md.c.

void md_super_write	(	struct mddev *	mddev,
		struct md_rdev *	rdev,
		sector_t	sector,
		int	size,
		struct page *	page
	)

Definition at line 778 of file md.c.

void md_trim_bio	(	struct bio *	bio,
		int	offset,
		int	size
	)

Definition at line 183 of file md.c.

void md_unplug	(	struct blk_plug_cb *	cb,
		bool	from_schedule
	)

Definition at line 464 of file md.c.

void md_unregister_thread

(

struct md_thread **

threadp

)

Definition at line 6755 of file md.c.

void md_wait_for_blocked_rdev	(	struct md_rdev *	rdev,
		struct mddev *	mddev
	)

Definition at line 7895 of file md.c.

void md_wakeup_thread

(

struct md_thread *

thread

)

Definition at line 6721 of file md.c.

void md_write_end

(

struct mddev *

mddev

)

Definition at line 7233 of file md.c.

void md_write_start	(	struct mddev *	mddev,
		struct bio *	bi
	)

Definition at line 7198 of file md.c.

int mddev_congested	(	struct mddev *	mddev,
		int	bits
	)

Definition at line 374 of file md.c.

void mddev_init

(

struct mddev *

mddev

)

Definition at line 509 of file md.c.

void mddev_resume

(

struct mddev *

mddev

)

Definition at line 362 of file md.c.

void mddev_suspend

(

struct mddev *

mddev

)

Definition at line 350 of file md.c.

MODULE_ALIAS

(

"md"

)

MODULE_ALIAS_BLOCKDEV_MAJOR

(

MD_MAJOR

)

MODULE_DESCRIPTION

(

"MD RAID framework"

)

module_exit

(

md_exit

)

Definition at line 8588 of file md.c.

MODULE_LICENSE

(

"GPL"

)

module_param	(	start_dirty_degraded	,
		int	,
		S_IRUGO|	S_IWUSR
	)

module_param_call	(	start_ro	,
		set_ro	,
		get_ro	,
		NULL	,
		S_IRUSR|	S_IWUSR
	)

module_param_call	(	new_array	,
		add_named_array	,
		NULL	,
		NULL	,
		S_IWUSR
	)

int rdev_clear_badblocks	(	struct md_rdev *	rdev,
		sector_t	s,
		int	sectors,
		int	is_new
	)

Definition at line 8283 of file md.c.

int rdev_set_badblocks	(	struct md_rdev *	rdev,
		sector_t	s,
		int	sectors,
		int	is_new
	)

Definition at line 8168 of file md.c.

int register_md_personality

(

struct md_personality *

p

)

Definition at line 7118 of file md.c.

void restore_bitmap_write_access

(

struct file *

file

)

Definition at line 5214 of file md.c.

int strict_strtoul_scaled	(	const char *	cp,
		unsigned long *	res,
		int	scale
	)

Definition at line 3378 of file md.c.

subsys_initcall

(

md_init

)

int sync_page_io	(	struct md_rdev *	rdev,
		sector_t	sector,
		int	size,
		struct page *	page,
		int	rw,
		bool	metadata_op
	)

Definition at line 817 of file md.c.

int unregister_md_personality

(

struct md_personality *

p

)

Definition at line 7127 of file md.c.

Variable Documentation

int mdp_major = 0

Definition at line 4792 of file md.c.