From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Mason Subject: Re: [PATCH] btrfs: Add a new mount option to grow the FS to the limit of the device Date: Tue, 3 Aug 2010 07:49:47 -0400 Message-ID: <20100803114947.GO16630@think> References: <4C5684D8.4080702@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-btrfs@vger.kernel.org, kyungmin.park@samsung.com To: Donggeun Kim Return-path: In-Reply-To: <4C5684D8.4080702@samsung.com> List-ID: 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