Re: [PATCH] BTRFS-PROG: recursively subvolume snapshot and delete

[Goffredo Baroncelli <kreijack@libero.it>]

On 2013-11-26 16:12, Konstantinos Skarlatos wrote:
> On 25/11/2013 11:23 μμ, Goffredo Baroncelli wrote:
>> Hi all,
>>
>> nobody is interested in these new features ?
> Is this ZFS-style recursive snapshotting? If yes, i am interested, and
> thanks for your great work :)

No it is not equal. My recursive snapshotting is not atomic as the ZFS
one; every subvolume snapshot is atomic, but each snapshot is taken at
different time.

BR
G.Baroncelli

>>
>> On 2013-11-16 18:09, Goffredo Baroncelli wrote:
>>> Hi All,
>>>
>>> the following patches implement the recursively snapshotting and
>>> deleting of a subvolume.
>>>
>>> To snapshot recursively you must pass the -R switch:
>>>
>>> # btrfs subvolume create sub1
>>> Create subvolume './sub1'
>>> # btrfs subvolume create sub1/sub2
>>> Create subvolume 'sub1/sub2'
>>>
>>> # btrfs subvolume snapshot -R sub1 sub1-snap
>>> Create a snapshot of 'sub1' in './sub1-snap'
>>> Create a snapshot of 'sub1/sub2' in './sub1-snap/sub2'
>>>
>>> To recursively delete subvolumes, you must pass the switch '-R':
>>>
>>> # btrfs subvolume create sub1
>>> Create subvolume './sub1'
>>> # btrfs subvolume create sub1/sub2
>>> Create subvolume 'sub1/sub2'
>>>
>>> # btrfs subvolume delete -R sub1
>>> Delete subvolume '/root/sub1/sub2'
>>> Delete subvolume '/root/sub1'
>>>
>>>
>>> Some caveats:
>>> 1) the recursively behaviour need the root capability
>>> This because how the subvolume are discovered
>>>
>>> 2) it is not possible to recursively snapshot a subvolume
>>> in read-only mode
>>> This because when a subvolume is snapshotted, its
>>> nested subvolumes appear as directory in the snapshot.
>>> These directories are removed before snapshotting the
>>> nested subvolumes. This is incompatible with a read
>>> only subvolume.
>>>
>>> BR
>>> G.Baroncelli
>>>
>>> -- 
>>> To unsubscribe from this list: send the line "unsubscribe
>>> linux-btrfs" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>
>>
> 
> -- 
> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 


-- 
gpg @keyserver.linux.it: Goffredo Baroncelli (kreijackATinwind.it>
Key fingerprint BBF5 1610 0B64 DAC6 5F7D  17B2 0EDA 9B37 8B82 E0B5