On Wed, Aug 04, 2010 at 08:34:43PM +0900, Donggeun Kim wrote: > Chris Mason wrote: > > 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 > > > I'm sorry not to fully understand your comment. > Do you mean that device file name for being resized is specified after 'maxsize' mount option? > e.g) #mount -o maxsize=/dev/sda1 ... In the resize ioctl you can pass a device number, something like 2:max, which allows you to say make device #2 the full size of the device. btrfs-show can be used to find the correct device number for a given disk. We don't use the device name because the scan might have found a different device name to tie into the FS. Thanks, Chris -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
