356 lines
8 KiB
Perl
356 lines
8 KiB
Perl
package Machine;
|
|
|
|
use strict;
|
|
use threads;
|
|
use Thread::Queue;
|
|
use Socket;
|
|
use IO::Handle;
|
|
use POSIX qw(dup2);
|
|
use FileHandle;
|
|
use Cwd;
|
|
|
|
|
|
# Stuff our PID in the multicast address/port to prevent collissions
|
|
# with other NixOS VM networks.
|
|
my $mcastAddr = "232.18.1." . ($$ >> 8) . ":" . (64000 + ($$ & 0xff));
|
|
print STDERR "using multicast address $mcastAddr\n";
|
|
|
|
|
|
sub new {
|
|
my ($class, $args) = @_;
|
|
|
|
my $startCommand = $args->{startCommand};
|
|
if (!$startCommand) {
|
|
# !!! merge with qemu-vm.nix.
|
|
$startCommand =
|
|
"qemu-system-x86_64 -m 384 -no-kvm-irqchip " .
|
|
"-net nic,model=virtio -net user \$QEMU_OPTS ";
|
|
$startCommand .= "-drive file=" . Cwd::abs_path($args->{hda}) . ",if=virtio,boot=on,werror=report "
|
|
if defined $args->{hda};
|
|
$startCommand .= "-cdrom $args->{cdrom} "
|
|
if defined $args->{cdrom};
|
|
}
|
|
|
|
my $name = $args->{name};
|
|
if (!$name) {
|
|
$startCommand =~ /run-(.*)-vm$/;
|
|
$name = $1 || "machine";
|
|
}
|
|
|
|
my $tmpDir = $ENV{'TMPDIR'} || "/tmp";
|
|
|
|
my $self = {
|
|
startCommand => $startCommand,
|
|
name => $name,
|
|
booted => 0,
|
|
pid => 0,
|
|
connected => 0,
|
|
connectedQueue => Thread::Queue->new(),
|
|
socket => undef,
|
|
stateDir => "$tmpDir/$name",
|
|
};
|
|
|
|
mkdir $self->{stateDir}, 0700;
|
|
|
|
bless $self, $class;
|
|
return $self;
|
|
}
|
|
|
|
|
|
sub log {
|
|
my ($self, $msg) = @_;
|
|
chomp $msg;
|
|
print STDERR $self->{name}, ": $msg\n";
|
|
}
|
|
|
|
|
|
sub name {
|
|
my ($self) = @_;
|
|
return $self->{name};
|
|
}
|
|
|
|
|
|
sub stateDir {
|
|
my ($self) = @_;
|
|
return $self->{stateDir};
|
|
}
|
|
|
|
|
|
sub start {
|
|
my ($self) = @_;
|
|
return if $self->{booted};
|
|
|
|
$self->log("starting vm");
|
|
|
|
my ($read, $write) = FileHandle::pipe;
|
|
|
|
my $pid = fork();
|
|
die if $pid == -1;
|
|
|
|
if ($pid == 0) {
|
|
close $read;
|
|
dup2(fileno($write), fileno(STDOUT));
|
|
dup2(fileno($write), fileno(STDERR));
|
|
open NUL, "</dev/null" or die;
|
|
dup2(fileno(NUL), fileno(STDIN));
|
|
$ENV{TMPDIR} = $self->{stateDir};
|
|
$ENV{QEMU_OPTS} = "-nographic -no-reboot -redir tcp:65535::514 -net nic,vlan=1 -net socket,vlan=1,mcast=$mcastAddr";
|
|
$ENV{QEMU_KERNEL_PARAMS} = "hostTmpDir=$ENV{TMPDIR}";
|
|
chdir $self->{stateDir} or die;
|
|
exec $self->{startCommand};
|
|
die;
|
|
}
|
|
|
|
close $write;
|
|
|
|
threads->create(\&processQemuOutput, $self, $read)->detach;
|
|
|
|
sub processQemuOutput {
|
|
my ($self, $read) = @_;
|
|
$/ = "\r\n";
|
|
while (<$read>) {
|
|
chomp;
|
|
print STDERR $self->name, "# $_\n";
|
|
$self->{connectedQueue}->enqueue(1) if $_ eq "===UP===";
|
|
}
|
|
# If the child dies, wake up connect().
|
|
$self->{connectedQueue}->enqueue(1);
|
|
}
|
|
|
|
$self->log("vm running as pid $pid");
|
|
$self->{pid} = $pid;
|
|
$self->{booted} = 1;
|
|
}
|
|
|
|
|
|
# Call the given code reference repeatedly, with 1 second intervals,
|
|
# until it returns 1 or a timeout is reached.
|
|
sub retry {
|
|
my ($coderef) = @_;
|
|
my $n;
|
|
for ($n = 0; $n < 900; $n++) {
|
|
return if &$coderef;
|
|
sleep 1;
|
|
}
|
|
die "action timed out after $n seconds";
|
|
}
|
|
|
|
|
|
sub connect {
|
|
my ($self) = @_;
|
|
return if $self->{connected};
|
|
|
|
$self->start;
|
|
|
|
# Wait until the processQemuOutput thread signals that the machine
|
|
# is up.
|
|
retry sub {
|
|
return 1 if $self->{connectedQueue}->dequeue_nb();
|
|
};
|
|
|
|
retry sub {
|
|
$self->log("trying to connect");
|
|
my $socket = new IO::Handle;
|
|
$self->{socket} = $socket;
|
|
socket($socket, PF_UNIX, SOCK_STREAM, 0) or die;
|
|
connect($socket, sockaddr_un($self->{stateDir} . "/65535.socket")) or die;
|
|
$socket->autoflush(1);
|
|
print $socket "echo hello\n" or next;
|
|
flush $socket;
|
|
my $line = readline($socket);
|
|
chomp $line;
|
|
return 1 if $line eq "hello";
|
|
};
|
|
|
|
$self->log("connected");
|
|
$self->{connected} = 1;
|
|
}
|
|
|
|
|
|
sub waitForShutdown {
|
|
my ($self) = @_;
|
|
return unless $self->{booted};
|
|
|
|
waitpid $self->{pid}, 0;
|
|
$self->{pid} = 0;
|
|
$self->{booted} = 0;
|
|
}
|
|
|
|
|
|
sub execute {
|
|
my ($self, $command) = @_;
|
|
|
|
$self->connect;
|
|
|
|
$self->log("running command: $command");
|
|
|
|
print { $self->{socket} } ("( $command ); echo '|!=EOF' \$?\n");
|
|
|
|
my $out = "";
|
|
|
|
while (1) {
|
|
my $line = readline($self->{socket}) or die "connection to VM lost unexpectedly";
|
|
#$self->log("got line: $line");
|
|
if ($line =~ /^(.*)\|\!\=EOF\s+(\d+)$/) {
|
|
$out .= $1;
|
|
$self->log("exit status $2");
|
|
return ($2, $out);
|
|
}
|
|
$out .= $line;
|
|
}
|
|
}
|
|
|
|
|
|
sub mustSucceed {
|
|
my ($self, @commands) = @_;
|
|
my $res;
|
|
foreach my $command (@commands) {
|
|
my ($status, $out) = $self->execute($command);
|
|
if ($status != 0) {
|
|
$self->log("output: $out");
|
|
die "command `$command' did not succeed (exit code $status)";
|
|
}
|
|
$res .= $out;
|
|
}
|
|
return $res;
|
|
}
|
|
|
|
|
|
sub waitUntilSucceeds {
|
|
my ($self, $command) = @_;
|
|
retry sub {
|
|
my ($status, $out) = $self->execute($command);
|
|
return 1 if $status == 0;
|
|
};
|
|
}
|
|
|
|
|
|
sub mustFail {
|
|
my ($self, $command) = @_;
|
|
my ($status, $out) = $self->execute($command);
|
|
die "command `$command' unexpectedly succeeded"
|
|
if $status == 0;
|
|
}
|
|
|
|
|
|
# Wait for an Upstart job to reach the "running" state.
|
|
sub waitForJob {
|
|
my ($self, $jobName) = @_;
|
|
retry sub {
|
|
my ($status, $out) = $self->execute("initctl status $jobName");
|
|
return 1 if $out =~ /start\/running/;
|
|
};
|
|
}
|
|
|
|
|
|
# Wait until the specified file exists.
|
|
sub waitForFile {
|
|
my ($self, $fileName) = @_;
|
|
retry sub {
|
|
my ($status, $out) = $self->execute("test -e $fileName");
|
|
return 1 if $status == 0;
|
|
}
|
|
}
|
|
|
|
|
|
sub stopJob {
|
|
my ($self, $jobName) = @_;
|
|
$self->execute("initctl stop $jobName");
|
|
my ($status, $out) = $self->execute("initctl status $jobName");
|
|
die "failed to stop $jobName" unless $out =~ /stop\/waiting/;
|
|
}
|
|
|
|
|
|
# Wait until the machine is listening on the given TCP port.
|
|
sub waitForOpenPort {
|
|
my ($self, $port) = @_;
|
|
retry sub {
|
|
my ($status, $out) = $self->execute("nc -z localhost $port");
|
|
return 1 if $status == 0;
|
|
}
|
|
}
|
|
|
|
|
|
# Wait until the machine is not listening on the given TCP port.
|
|
sub waitForClosedPort {
|
|
my ($self, $port) = @_;
|
|
retry sub {
|
|
my ($status, $out) = $self->execute("nc -z localhost $port");
|
|
return 1 if $status != 0;
|
|
}
|
|
}
|
|
|
|
|
|
sub shutdown {
|
|
my ($self) = @_;
|
|
return unless $self->{booted};
|
|
|
|
$self->execute("poweroff");
|
|
|
|
$self->waitForShutdown;
|
|
}
|
|
|
|
|
|
# Make the machine unreachable by shutting down eth1 (the multicast
|
|
# interface used to talk to the other VMs). We keep eth0 up so that
|
|
# the test driver can continue to talk to the machine.
|
|
sub block {
|
|
my ($self) = @_;
|
|
$self->mustSucceed("ifconfig eth1 down");
|
|
}
|
|
|
|
|
|
# Make the machine reachable.
|
|
sub unblock {
|
|
my ($self) = @_;
|
|
$self->mustSucceed("ifconfig eth1 up");
|
|
}
|
|
|
|
|
|
# Take a screenshot of the X server on :0.0.
|
|
sub screenshot {
|
|
my ($self, $filename) = @_;
|
|
my $scrot = $ENV{'scrot'} or die;
|
|
$self->mustSucceed("$scrot /hostfs/$ENV{out}/${filename}.png");
|
|
}
|
|
|
|
|
|
# Wait until it is possible to connect to the X server. Note that
|
|
# testing the existence of /tmp/.X11-unix/X0 is insufficient.
|
|
sub waitForX {
|
|
my ($self, $regexp) = @_;
|
|
retry sub {
|
|
my ($status, $out) = $self->execute("xwininfo -root > /dev/null 2>&1");
|
|
return 1 if $status == 0;
|
|
}
|
|
};
|
|
|
|
|
|
sub getWindowNames {
|
|
my ($self) = @_;
|
|
my $res = $self->mustSucceed(
|
|
q{xwininfo -root -tree | sed 's/.*0x[0-9a-f]* \"\([^\"]*\)\".*/\1/; t; d'});
|
|
return split /\n/, $res;
|
|
}
|
|
|
|
|
|
sub waitForWindow {
|
|
my ($self, $regexp) = @_;
|
|
retry sub {
|
|
my @names = $self->getWindowNames;
|
|
foreach my $n (@names) {
|
|
return 1 if $n =~ /$regexp/;
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
sub copyFileFromHost {
|
|
my ($self, $from, $to) = @_;
|
|
my $s = `cat $from` or die;
|
|
$self->mustSucceed("echo '$s' > $to"); # !!! escaping
|
|
}
|
|
|
|
|
|
1;
|