Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit a78d38a1 authored by NeilBrown's avatar NeilBrown
Browse files

md: add support for raid5 to raid4 conversion 



This is unlikely to be wanted, but we may as well provide it
for completeness.

Signed-off-by: default avatarNeilBrown <neilb@suse.de>
parent 5cac7861

drivers/md/raid5.c

+13 −0
Original line number Diff line number Diff line
@@ -5788,6 +5788,18 @@ static void *raid5_takeover(mddev_t *mddev) 
	return ERR_PTR(-EINVAL);

}



static void *raid4_takeover(mddev_t *mddev)

{

	/* raid4 can take over raid5 if layout is right.

	 */

	if (mddev->level == 5 &&

	    mddev->layout == ALGORITHM_PARITY_N) {

		mddev->new_layout = 0;

		mddev->new_level = 4;

		return setup_conf(mddev);

	}

	return ERR_PTR(-EINVAL);

}



static struct mdk_personality raid5_personality;
@@ -5903,6 +5915,7 @@ static struct mdk_personality raid4_personality = 
	.start_reshape  = raid5_start_reshape,

	.finish_reshape = raid5_finish_reshape,

	.quiesce	= raid5_quiesce,

	.takeover	= raid4_takeover,

};



static int __init raid5_init(void)