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# -*- perl -*-
#
# Copyright (C) 2009-2010 Red Hat, Inc.
# Copyright (C) 2009 Daniel P. Berrange
#
# This program is free software; You can redistribute it and/or modify
# it under the GNU General Public License as published by the Free
# Software Foundation; either version 2, or (at your option) any
# later version
#
# The file "LICENSE" distributed along with this file provides full
# details of the terms and conditions
#
=pod
=head1 NAME
qemu/200-qcow2-single-backing-file.t - Check handling of 1 level backing file
=head1 DESCRIPTION
In this test are two files
- back.img is a raw file
- main.img is a qcow2 file, with backing file pointing to back.img
The guest is configured to point at 'main.img' but
is told that it is a raw file.
Thus, libvirt's security drivers should *not* grant
access to the back.img file & the guest should not
see the back.img data or have any error.
=cut
use strict;
use warnings;
use Test::More tests => 20;
use Sys::Virt::TCK;
use Test::Exception;
use File::Spec::Functions qw(catfile);
use File::stat;
my $tck = Sys::Virt::TCK->new();
my $conn = eval { $tck->setup(); };
BAIL_OUT "failed to setup test harness: $@" if $@;
END { $tck->cleanup if $tck; }
SKIP: {
skip "Only relevant to QEMU driver", 20 unless $conn->get_type() eq "QEMU";
skip "Only relevant when run as root", 20 unless $< == 0;
skip "Only relevant for system driver", 20 unless
$conn->get_uri() =~ m/system/;
my $xml = $tck->generic_pool("dir")
->mode("0755")->as_xml;
diag "Defining transient storage pool $xml";
my $pool;
ok_pool(sub { $pool = $conn->define_storage_pool($xml) }, "define transient storage pool");
lives_ok(sub { $pool->build(0) }, "built storage pool");
lives_ok(sub { $pool->create }, "started storage pool");
my $volbackxml = $tck->generic_volume("tck-back", "raw", 1024*1024*50)
->allocation(0)->as_xml;
my $st;
my ($volback, $pathback);
diag "back $volbackxml";
ok_volume(sub { $volback = $pool->create_volume($volbackxml) }, "create raw backing file volume");
$pathback = xpath($volback, "string(/volume/target/path)");
$st = stat($pathback);
ok($st, "path $pathback exists");
is($st->size, 1024*1024*50, "size is 50M");
my $volmainxml = $tck->generic_volume("tck-main", "qcow2", 1024*1024*50)
->backing_file($pathback)
->backing_format("raw")
->allocation(0)->as_xml;
my ($volmain, $pathmain);
diag "main $volmainxml";
ok_volume(sub { $volmain = $pool->create_volume($volmainxml) }, "create qcow2 backing file volume");
$pathmain = xpath($volmain, "string(/volume/target/path)");
$st = stat($pathmain);
ok($st, "path $pathmain exists");
ok($st->size < 1024*1024, "size is < 1M");
# We point the guest at a qcow2 image, but tell it that is
# is raw. Thus *nothing* should ever try to open the backing
# store in this qcow2 image.
$xml = $tck->generic_domain("tck")
->disk(format => { name => "qemu", type => "raw" },
type => "file",
src => $pathmain,
dst => "vdb")
->as_xml;
diag "Defining an inactive domain config $xml";
my $dom;
ok_domain(sub { $dom = $conn->define_domain($xml) }, "defined persistent domain config");
warn "Disk " . xpath($dom, "/domain/devices/disk[0]/driver/\@type");
warn "Disk " . xpath($dom, "/domain/devices/disk[1]/driver/\@type");
diag "Starting inactive domain config";
$dom->create;
ok($dom->get_id() > 0, "running domain has an ID > 0");
diag "Trying another domain lookup by name";
my $dom1;
ok_domain(sub { $dom1 = $conn->get_domain_by_name("tck") }, "the running domain object");
ok($dom1->get_id() > 0, "running domain has an ID > 0");
open PID, "/var/run/libvirt/qemu/tck.pid"
or die "cannot read PID /var/run/libvirt/qemu/tck.pid: $!";
my $pid = <PID>;
chomp $pid;
close PID;
open STAT, "/proc/$pid/status"
or die "cannot read status /proc/$pid/status: $!";
my ($gid, $uid);
while (<STAT>) {
if (/Uid:\s*(\d+)/) {
$uid = $1;
} elsif (/Gid:\s*(\d+)/) {
$gid = $1;
}
}
close STAT;
$st = stat($pathmain);
ok($st, "path $pathmain exists");
diag "UID:GID on $pathmain is " . $st->uid . ":" . $st->gid;
my $aclmain = `getfacl -n $pathmain`;
diag "ACL on $pathmain is $aclmain";
ok (($aclmain =~ "user:$uid:rw-") ||
($st->uid == $uid), "Ownership or ACL of file $pathmain allows $uid");
ok (($aclmain =~ "group:$gid:rw-") ||
($st->gid == $gid), "Ownership or ACL of file $pathmain allows $gid");
$st = stat($pathback);
ok($st, "path $pathback exists");
diag "UID:GID on $pathback is " . $st->uid . ":" . $st->gid;
my $aclback = `getfacl -n $pathback`;
diag "ACL on $pathback is $aclback";
ok (($aclback !~ "user:$uid:") &&
(($uid == $<) || $st->uid != $uid),
"Ownership or ACL of file $pathback does not allow $uid");
ok (($aclback !~ "group:$gid:") &&
(($gid == $(+0) || $st->gid != $gid),
"Ownership or ACL of file $pathback does not allow $gid");
diag "Destroying the running domain";
$dom->destroy();
diag "Undefining the inactive domain config";
$dom->undefine;
ok_error(sub { $conn->get_domain_by_name("tck") }, "NO_DOMAIN error raised from missing domain", 42);
}
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