On 2015-07-09 02:22, Fajar A. Nugraha wrote:
> On Thu, Jul 9, 2015 at 8:20 AM, james harvey <jamespharvey20@gmail.com> wrote:
>> Request for new btrfs subvolume subcommand:
>>
>> clone or fork [-i <qgroupid] <source> [<dest>]<name>
>>     Create a subvolume <name> in <dest>, which is a clone or fork of source.
>>     If <dest> is not given, subvolume <name> will be created in the
>> current directory.
>>     Options
>>     -i <qgroupid>
>>        Add the newly created subvolume to a qgroup.  This option can be
>> given multiple times.
>>
>> Would (I think):
>> * btrfs subvolume create <dest-subvolume>
>> * cp -ax --reflink=always <source-subvolume>/* <dest-subvolume>/
>
> What's wrong with "btrfs subvolume snapshot"?
>
Well, personally I would say the fact that once something is tagged as a 
snapshot, you can't change it to a regular subvolume without doing a 
non-incremental send/receive.