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 :)
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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