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Commit 2cffc4a0 authored by NeilBrown's avatar NeilBrown
Browse files

md: remove CONFIG_MD_RAID_RESHAPE config option. 



This was only needed when the code was experimental.  Most of it
is well tested now, so the option is no longer useful.

Signed-off-by: default avatarNeilBrown <neilb@suse.de>
parent ab69ae12

drivers/md/Kconfig

+0 −29
Original line number Diff line number Diff line
@@ -152,35 +152,6 @@ config MD_RAID456 


	  If unsure, say Y.



config MD_RAID5_RESHAPE

	bool "Support adding drives to a raid-5 array"

	depends on MD_RAID456

	default y

	---help---

	  A RAID-5 set can be expanded by adding extra drives. This

	  requires "restriping" the array which means (almost) every

	  block must be written to a different place.



          This option allows such restriping to be done while the array

	  is online.



	  You will need mdadm version 2.4.1 or later to use this

	  feature safely.  During the early stage of reshape there is

	  a critical section where live data is being over-written.  A

	  crash during this time needs extra care for recovery.  The

	  newer mdadm takes a copy of the data in the critical section

	  and will restore it, if necessary, after a crash.



	  The mdadm usage is e.g.

	       mdadm --grow /dev/md1 --raid-disks=6

	  to grow '/dev/md1' to having 6 disks.



	  Note: The array can only be expanded, not contracted.

	  There should be enough spares already present to make the new

	  array workable.



	  If unsure, say Y.



config MD_RAID6_PQ

	tristate

drivers/md/raid5.c

+0 −10
Original line number Diff line number Diff line
@@ -948,7 +948,6 @@ static int grow_stripes(raid5_conf_t *conf, int num) 
	return 0;

}



#ifdef CONFIG_MD_RAID5_RESHAPE

static int resize_stripes(raid5_conf_t *conf, int newsize)

{

	/* Make all the stripes able to hold 'newsize' devices.
@@ -1073,7 +1072,6 @@ static int resize_stripes(raid5_conf_t *conf, int newsize) 
	conf->pool_size = newsize;

	return err;

}

#endif



static int drop_one_stripe(raid5_conf_t *conf)

{
@@ -4822,7 +4820,6 @@ static int raid5_resize(mddev_t *mddev, sector_t sectors) 
	return 0;

}



#ifdef CONFIG_MD_RAID5_RESHAPE

static int raid5_check_reshape(mddev_t *mddev)

{

	raid5_conf_t *conf = mddev_to_conf(mddev);
@@ -4967,7 +4964,6 @@ static int raid5_start_reshape(mddev_t *mddev) 
	md_new_event(mddev);

	return 0;

}

#endif



/* This is called from the reshape thread and should make any

 * changes needed in 'conf'
@@ -5289,11 +5285,9 @@ static struct mdk_personality raid6_personality = 
	.sync_request	= sync_request,

	.resize		= raid5_resize,

	.size		= raid5_size,

#ifdef CONFIG_MD_RAID5_RESHAPE

	.check_reshape	= raid5_check_reshape,

	.start_reshape  = raid5_start_reshape,

	.finish_reshape = raid5_finish_reshape,

#endif

	.quiesce	= raid5_quiesce,

	.takeover	= raid6_takeover,

	.reconfig	= raid6_reconfig,
@@ -5314,11 +5308,9 @@ static struct mdk_personality raid5_personality = 
	.sync_request	= sync_request,

	.resize		= raid5_resize,

	.size		= raid5_size,

#ifdef CONFIG_MD_RAID5_RESHAPE

	.check_reshape	= raid5_check_reshape,

	.start_reshape  = raid5_start_reshape,

	.finish_reshape = raid5_finish_reshape,

#endif

	.quiesce	= raid5_quiesce,

	.takeover	= raid5_takeover,

	.reconfig	= raid5_reconfig,
@@ -5340,11 +5332,9 @@ static struct mdk_personality raid4_personality = 
	.sync_request	= sync_request,

	.resize		= raid5_resize,

	.size		= raid5_size,

#ifdef CONFIG_MD_RAID5_RESHAPE

	.check_reshape	= raid5_check_reshape,

	.start_reshape  = raid5_start_reshape,

	.finish_reshape = raid5_finish_reshape,

#endif

	.quiesce	= raid5_quiesce,

};