Re: [pve-devel] [PATCH storage 2/9] plugin: dir: implement import content type

["Fabian Grünbichler" <f.gruenbichler@proxmox.com>]

On April 16, 2024 3:18 pm, Dominik Csapak wrote:
> in DirPlugin and not Plugin (because of cyclic dependency of
> Plugin -> OVF -> Storage -> Plugin otherwise)
> 
> only ovf is currently supported (though ova will be shown in import
> listing), expects the files to not be in a subdir, and adjacent to the
> ovf file.
> 
> Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
> ---
>  src/PVE/Storage.pm                 |  8 ++++++-
>  src/PVE/Storage/DirPlugin.pm       | 37 +++++++++++++++++++++++++++++-
>  src/PVE/Storage/OVF.pm             |  2 ++
>  src/PVE/Storage/Plugin.pm          | 18 ++++++++++++++-
>  src/test/parse_volname_test.pm     | 13 +++++++++++
>  src/test/path_to_volume_id_test.pm | 16 +++++++++++++
>  6 files changed, 91 insertions(+), 3 deletions(-)
> 
> diff --git a/src/PVE/Storage.pm b/src/PVE/Storage.pm
> index 40314a8..f8ea93d 100755
> --- a/src/PVE/Storage.pm
> +++ b/src/PVE/Storage.pm
> @@ -114,6 +114,8 @@ our $VZTMPL_EXT_RE_1 = qr/\.tar\.(gz|xz|zst)/i;
>  
>  our $BACKUP_EXT_RE_2 = qr/\.(tgz|(?:tar|vma)(?:\.(${\PVE::Storage::Plugin::COMPRESSOR_RE}))?)/;
>  
> +our $IMPORT_EXT_RE_1 = qr/\.(ov[af])/;
> +
>  # FIXME remove with PVE 8.0, add versioned breaks for pve-manager
>  our $vztmpl_extension_re = $VZTMPL_EXT_RE_1;
>  
> @@ -612,6 +614,7 @@ sub path_to_volume_id {
>  	my $backupdir = $plugin->get_subdir($scfg, 'backup');
>  	my $privatedir = $plugin->get_subdir($scfg, 'rootdir');
>  	my $snippetsdir = $plugin->get_subdir($scfg, 'snippets');
> +	my $importdir = $plugin->get_subdir($scfg, 'import');
>  
>  	if ($path =~ m!^$imagedir/(\d+)/([^/\s]+)$!) {
>  	    my $vmid = $1;
> @@ -640,6 +643,9 @@ sub path_to_volume_id {
>  	} elsif ($path =~ m!^$snippetsdir/([^/]+)$!) {
>  	    my $name = $1;
>  	    return ('snippets', "$sid:snippets/$name");
> +	} elsif ($path =~ m!^$importdir/([^/]+${IMPORT_EXT_RE_1})$!) {
> +	    my $name = $1;
> +	    return ('import', "$sid:import/$name");
>  	}
>      }
>  
> @@ -2170,7 +2176,7 @@ sub normalize_content_filename {
>  # If a storage provides an 'import' content type, it should be able to provide
>  # an object implementing the import information interface.
>  sub get_import_metadata {
> -    my ($cfg, $volid) = @_;
> +    my ($cfg, $volid, $target) = @_;
>  
>      my ($storeid, $volname) = parse_volume_id($volid);
>  
> diff --git a/src/PVE/Storage/DirPlugin.pm b/src/PVE/Storage/DirPlugin.pm
> index 2efa8d5..4dc7708 100644
> --- a/src/PVE/Storage/DirPlugin.pm
> +++ b/src/PVE/Storage/DirPlugin.pm
> @@ -10,6 +10,7 @@ use IO::File;
>  use POSIX;
>  
>  use PVE::Storage::Plugin;
> +use PVE::Storage::OVF;
>  use PVE::JSONSchema qw(get_standard_option);
>  
>  use base qw(PVE::Storage::Plugin);
> @@ -22,7 +23,7 @@ sub type {
>  
>  sub plugindata {
>      return {
> -	content => [ { images => 1, rootdir => 1, vztmpl => 1, iso => 1, backup => 1, snippets => 1, none => 1 },
> +	content => [ { images => 1, rootdir => 1, vztmpl => 1, iso => 1, backup => 1, snippets => 1, none => 1, import => 1 },
>  		     { images => 1,  rootdir => 1 }],
>  	format => [ { raw => 1, qcow2 => 1, vmdk => 1, subvol => 1 } , 'raw' ],
>      };
> @@ -247,4 +248,38 @@ sub check_config {
>      return $opts;
>  }
>  
> +sub get_import_metadata {
> +    my ($class, $scfg, $volname, $storeid, $target) = @_;
> +
> +    if ($volname !~ m!^([^/]+)/.*${PVE::Storage::IMPORT_EXT_RE_1}$!) {
> +	die "volume '$volname' does not look like an importable vm config\n";
> +    }

shouldn't this happen in parse_volname? or rather, why is this different
than the code there?

> +
> +    my $path = $class->path($scfg, $volname, $storeid, undef);
> +
> +    # NOTE: all types must be added to the return schema of the import-metadata API endpoint
> +    my $warnings = [];
> +
> +    my $res = PVE::Storage::OVF::parse_ovf($path, $isOva);

nit: $isOva doesn't yet exist in this patch, neither as variable here,
nor as parameter in parse_ovf ;)

> +    my $disks = {};
> +    for my $disk ($res->{disks}->@*) {
> +	my $id = $disk->{disk_address};
> +	my $size = $disk->{virtual_size};
> +	my $path = $disk->{relative_path};

see below

> +	$disks->{$id} = {
> +	    volid => "$storeid:import/$path",
> +	    defined($size) ? (size => $size) : (),
> +	};
> +    }
> +
> +    return {
> +	type => 'vm',
> +	source => $volname,
> +	'create-args' => $res->{qm},
> +	'disks' => $disks,
> +	warnings => $warnings,
> +	net => [],
> +    };
> +}
> +
>  1;
> diff --git a/src/PVE/Storage/OVF.pm b/src/PVE/Storage/OVF.pm
> index 90ca453..4a322b9 100644
> --- a/src/PVE/Storage/OVF.pm
> +++ b/src/PVE/Storage/OVF.pm
> @@ -222,6 +222,7 @@ ovf:Item[rasd:InstanceID='%s']/rasd:ResourceType", $controller_id);
>  	}
>  
>  	($backing_file_path) = $backing_file_path =~ m|^(/.*)|; # untaint
> +	($filepath) = $filepath =~ m|^(.*)|; # untaint

nit: that's a weird untaint ;) maybe add the `$` at least to prevent
future bugs?

>  
>  	my $virtual_size = PVE::Storage::file_size_info($backing_file_path);
>  	die "error parsing $backing_file_path, cannot determine file size\n"
> @@ -231,6 +232,7 @@ ovf:Item[rasd:InstanceID='%s']/rasd:ResourceType", $controller_id);
>  	    disk_address => $pve_disk_address,
>  	    backing_file => $backing_file_path,
>  	    virtual_size => $virtual_size
> +	    relative_path => $filepath,

nothing actually ensures $filepath doesn't contain an absolute path
(that is also valid when concatenating it with the ovs dir).. right now
it would then choke on the double `//`, but I haven't tried all the
wonky stuff you could possibly do..

wouldn't it be more safe to transform back from $backing_file_path to
ensure there is no mismatch/potential for confusion? also, I am not sure
if this wouldn't allow injecting stuff (if $filepath contains weird
characters, or its resolved variant $backing_file_path does) - should we
limit ourselves to a certain character set that we know to be okay as
part of a volid?

I have to admit I didn't follow the XML DTD stuff in detail (it's rather
convoluted), so maybe parts of this are handled there, but I am not sure
I would want to rely on that in any case ;)

>  	};
>  	push @disks, $pve_disk;
>  
> diff --git a/src/PVE/Storage/Plugin.pm b/src/PVE/Storage/Plugin.pm
> index 22a9729..deaf8b2 100644
> --- a/src/PVE/Storage/Plugin.pm
> +++ b/src/PVE/Storage/Plugin.pm
> @@ -654,6 +654,10 @@ sub parse_volname {
>  	return ('backup', $fn);
>      } elsif ($volname =~ m!^snippets/([^/]+)$!) {
>  	return ('snippets', $1);
> +    } elsif ($volname =~ m!^import/([^/]+$PVE::Storage::IMPORT_EXT_RE_1)$!) {
> +	return ('import', $1);
> +    } elsif ($volname =~ m!^import/([^/]+\.(raw|vmdk|qcow2))$!) {
> +	return ('images', $1, 0, undef, undef, undef, $2);
>      }
>  
>      die "unable to parse directory volume name '$volname'\n";
> @@ -666,6 +670,7 @@ my $vtype_subdirs = {
>      vztmpl => 'template/cache',
>      backup => 'dump',
>      snippets => 'snippets',
> +    import => 'import',
>  };
>  
>  sub get_vtype_subdirs {
> @@ -691,6 +696,11 @@ sub filesystem_path {
>      my ($vtype, $name, $vmid, undef, undef, $isBase, $format) =
>  	$class->parse_volname($volname);
>  
> +    if (defined($vmid) && $vmid == 0) {
> +	# import volumes?
> +	$vtype = 'import';
> +    }
> +
>      # Note: qcow2/qed has internal snapshot, so path is always
>      # the same (with or without snapshot => same file).
>      die "can't snapshot this image format\n"
> @@ -1227,7 +1237,7 @@ sub list_images {
>      return $res;
>  }
>  
> -# list templates ($tt = <iso|vztmpl|backup|snippets>)
> +# list templates ($tt = <iso|vztmpl|backup|snippets|import>)
>  my $get_subdir_files = sub {
>      my ($sid, $path, $tt, $vmid) = @_;
>  
> @@ -1283,6 +1293,10 @@ my $get_subdir_files = sub {
>  		volid => "$sid:snippets/". basename($fn),
>  		format => 'snippet',
>  	    };
> +	} elsif ($tt eq 'import') {
> +	    next if $fn !~ m!/([^/]+$PVE::Storage::IMPORT_EXT_RE_1)$!i;
> +
> +	    $info = { volid => "$sid:import/$1", format => "$2" };
>  	}
>  
>  	$info->{size} = $st->size;
> @@ -1317,6 +1331,8 @@ sub list_volumes {
>  		$data = $get_subdir_files->($storeid, $path, 'backup', $vmid);
>  	    } elsif ($type eq 'snippets') {
>  		$data = $get_subdir_files->($storeid, $path, 'snippets');
> +	    } elsif ($type eq 'import') {
> +		$data = $get_subdir_files->($storeid, $path, 'import');
>  	    }
>  	}
>  
> diff --git a/src/test/parse_volname_test.pm b/src/test/parse_volname_test.pm
> index d6ac885..59819f0 100644
> --- a/src/test/parse_volname_test.pm
> +++ b/src/test/parse_volname_test.pm
> @@ -81,6 +81,19 @@ my $tests = [
>  	expected    => ['snippets', 'hookscript.pl'],
>      },
>      #
> +    #
> +    #
> +    {
> +	description => "Import, ova",
> +	volname     => 'import/import.ova',
> +	expected    => ['import', 'import.ova'],
> +    },
> +    {
> +	description => "Import, ovf",
> +	volname     => 'import/import.ovf',
> +	expected    => ['import', 'import.ovf'],
> +    },
> +    #
>      # failed matches
>      #
>      {
> diff --git a/src/test/path_to_volume_id_test.pm b/src/test/path_to_volume_id_test.pm
> index 8149c88..8bc1bf8 100644
> --- a/src/test/path_to_volume_id_test.pm
> +++ b/src/test/path_to_volume_id_test.pm
> @@ -174,6 +174,22 @@ my @tests = (
>  	    'local:vztmpl/debian-10.0-standard_10.0-1_amd64.tar.xz',
>  	],
>      },
> +    {
> +	description => 'Import, ova',
> +	volname     => "$storage_dir/import/import.ova",
> +	expected    => [
> +	    'import',
> +	    'local:import/import.ova',
> +	],
> +    },
> +    {
> +	description => 'Import, ovf',
> +	volname     => "$storage_dir/import/import.ovf",
> +	expected    => [
> +	    'import',
> +	    'local:import/import.ovf',
> +	],
> +    },
>  
>      # no matches, path or files with failures
>      {
> -- 
> 2.39.2
> 
> 
> 
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> 
> 


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