Commit 8ddeeae5 authored Mar 27, 2006 by NeilBrown Committed by Linus Torvalds Mar 27, 2006

[PATCH] md: Fix md grow/size code to correctly find the maximum available space



An md array can be asked to change the amount of each device that it is using,
and in particular can be asked to use the maximum available space.  This
currently only works if the first device is not larger than the rest.  As
'size' gets changed and so 'fit' becomes wrong.  So check if a 'fit' is
required early and don't corrupt it.

Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent f6344757

drivers/md/md.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -3575,6 +3575,7 @@ static int update_size(mddev_t *mddev, unsigned long size)
		mdk_rdev_t * rdev;
		int rv;
		struct list_head *tmp;
		int fit = (size == 0);

		if (mddev->pers->resize == NULL)
		return -EINVAL;
		@@ -3592,7 +3593,6 @@ static int update_size(mddev_t *mddev, unsigned long size)
		return -EBUSY;
		ITERATE_RDEV(mddev,rdev,tmp) {
		sector_t avail;
		int fit = (size == 0);
		if (rdev->sb_offset > rdev->data_offset)
		avail = (rdev->sb_offset*2) - rdev->data_offset;
		else

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