[pve-devel] [PATCH storage v4] fix #4272: btrfs: add rename feature

[Aaron Lauterer]

gave this a test spin once more with VM disks. default RAW ones and 
manually placed qcow2 and vmdk images for the fallback option to the 
SUPER implementation


Tested-By: Aaron Lauterer <a.lauterer at proxmox.com>
Reviewed-By: Aaron Lauterer <a.lauterer at proxmox.com>


On  2024-07-05  15:10, Maximiliano Sandoval wrote:
> Adds the ability to change the owner of a guest image.
> 
> Btrfs does not need special commands to rename a subvolume and this can
> be achieved the same as in Storage/plugin.pm's rename_volume taking
> special care of how the directory structure used by Btrfs.
> 
> Signed-off-by: Maximiliano Sandoval <m.sandoval at proxmox.com>
> ---
> Differences from v3:
>   - add qcow2 and vmdk support for rename
>   - remove unused $ppath variable
> 
> Differences from v2:
>   - use indices instead of assigning to undef 5 times
> 
> Differences from v1:
>   - avoid assigning unused values of returned list to variables
> 
>   src/PVE/Storage/BTRFSPlugin.pm | 33 +++++++++++++++++++++++++++++++++
>   1 file changed, 33 insertions(+)
> 
> diff --git a/src/PVE/Storage/BTRFSPlugin.pm b/src/PVE/Storage/BTRFSPlugin.pm
> index 42815cb..385ac30 100644
> --- a/src/PVE/Storage/BTRFSPlugin.pm
> +++ b/src/PVE/Storage/BTRFSPlugin.pm
> @@ -618,6 +618,9 @@ sub volume_has_feature {
>   	    base => { qcow2 => 1, raw => 1, vmdk => 1 },
>   	    current => { qcow2 => 1, raw => 1, vmdk => 1 },
>   	},
> +	rename => {
> +	    current => { qcow2 => 1, raw => 1, vmdk => 1 },
> +	},
>       };
>   
>       my ($vtype, $name, $vmid, $basename, $basevmid, $isBase, $format) = $class->parse_volname($volname);
> @@ -930,4 +933,34 @@ sub volume_import {
>       return "$storeid:$volname";
>   }
>   
> +sub rename_volume {
> +    my ($class, $scfg, $storeid, $source_volname, $target_vmid, $target_volname) = @_;
> +    die "no path found\n" if !$scfg->{path};
> +
> +    my $format = ($class->parse_volname($source_volname))[6];
> +
> +    if ($format ne 'raw' && $format ne 'subvol') {
> +       return $class->SUPER::rename_volume($scfg, $storeid, $source_volname, $target_vmid, $target_volname);
> +    }
> +
> +    $target_volname = $class->find_free_diskname($storeid, $scfg, $target_vmid, $format, 1)
> +	if !$target_volname;
> +    $target_volname = "$target_vmid/$target_volname";
> +
> +    my $basedir = $class->get_subdir($scfg, 'images');
> +
> +    mkpath "${basedir}/${target_vmid}";
> +    my $source_dir = raw_name_to_dir($source_volname);
> +    my $target_dir = raw_name_to_dir($target_volname);
> +
> +    my $old_path = "${basedir}/${source_dir}";
> +    my $new_path = "${basedir}/${target_dir}";
> +
> +    die "target volume '${target_volname}' already exists\n" if -e $new_path;
> +    rename $old_path, $new_path ||
> +	die "rename '$old_path' to '$new_path' failed - $!\n";
> +
> +    return "${storeid}:$target_volname";
> +}
> +
>   1