Re: [PATCH] btrfs: Add a new mount option to grow the FS to the limit of the device

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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 ...

Thank you.
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