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

[Goffredo Baroncelli <kreijack@libero.it>]

Hi all,

nobody is interested in these new features ?

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
> 
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