On Mon, Aug 02, 2010 at 05:42:00PM +0900, Donggeun Kim wrote:
> In some cases, resizing a file system to the maximum device size is required.
> When flashing a file system image to a block device,
> the file system does not fit into the block device's size.
> Currently, executing 'btrfsctl' application is the only way
> to grow the file system to the limit of the device.
> If the mount option which alters the device size of a file system
> to the limit of the device is supported,
> it can be useful regardless of the existence of 'btrfsctl' program.
> This patch allows the file system to grow to the maximum size of the device
> on mount time.
> The new mount option name is 'maxsize'.

I think this is a very useful feature, but could you please change the
patch to allow controlling which device is resized?

The ioctl allows you to pass in a device number (where the number comes
from btrfs-show)

Thanks!

-chris
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