Re: [PATCH v6 0/7] storage:dir: ploop volumes support

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On Mon, Apr 11, 2016 at 07:16:18PM +0300, Olga Krishtal wrote:
> 
> 
> 
> This series of patches introduces the support of ploop volumes
> in storage pools (dir, fs, etc).
> Ploop volume is a disk loopback block device consists of root.hds
> (it is the image file) and DiskDescriptor.xml:
> https://openvz.org/Ploop/format. Due to this fact it can't be treated
> as file or any other volume type, moreover, in order to successfully
> manipulate with such volume, ploop tools should be installed.
> 
> All callbacks except  the wipeVol are supported. 
> First patch introduces ploop volume type. This is a directory
> with two files inside. The name of the directory is the name of the volume.
> Patch 2 deals with creating an empty volume and cloning the existing one.
> Clone is done via simle cp operation. If any of this operation fails -
> directory will be deleted.
> Patch 3 deletes recursively ploop directory. 
> Patch 4 uses ploop tool to resize volume.
> Patch 6 adapts all refreshing functions to work with ploop. To get
> information the directory is checked. The volume is treated as the
> ploops one only if it contains ploop files. Every time the pool
> is refreshed DiskDescriptor.xml is restored. This is necessary, because
> the content of the volume may have changed.
> Upload and download (patch 7) can't be done if the volume contains snapshots.
> 

I have squashed in the changes mentioned in the individual patch
reviews and pushed the series.

Jan

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