mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-12-25 03:17:13 +00:00
625 lines
16 KiB
Perl
625 lines
16 KiB
Perl
package Machine;
|
||
|
||
use strict;
|
||
use threads;
|
||
use Socket;
|
||
use IO::Handle;
|
||
use POSIX qw(dup2);
|
||
use FileHandle;
|
||
use Cwd;
|
||
use File::Basename;
|
||
use File::Path qw(make_path);
|
||
use File::Slurp;
|
||
|
||
|
||
my $showGraphics = defined $ENV{'DISPLAY'};
|
||
|
||
my $sharedDir;
|
||
|
||
|
||
sub new {
|
||
my ($class, $args) = @_;
|
||
|
||
my $startCommand = $args->{startCommand};
|
||
|
||
my $name = $args->{name};
|
||
if (!$name) {
|
||
$startCommand =~ /run-(.*)-vm$/ if defined $startCommand;
|
||
$name = $1 || "machine";
|
||
}
|
||
|
||
if (!$startCommand) {
|
||
# !!! merge with qemu-vm.nix.
|
||
$startCommand =
|
||
"qemu-kvm -m 384 " .
|
||
"-net nic,model=virtio \$QEMU_OPTS ";
|
||
my $iface = $args->{hdaInterface} || "virtio";
|
||
$startCommand .= "-drive file=" . Cwd::abs_path($args->{hda}) . ",if=$iface,werror=report "
|
||
if defined $args->{hda};
|
||
$startCommand .= "-cdrom $args->{cdrom} "
|
||
if defined $args->{cdrom};
|
||
$startCommand .= "-device piix3-usb-uhci -drive id=usbdisk,file=$args->{usb},if=none,readonly -device usb-storage,drive=usbdisk "
|
||
if defined $args->{usb};
|
||
$startCommand .= "-bios $args->{bios} "
|
||
if defined $args->{bios};
|
||
$startCommand .= $args->{qemuFlags} || "";
|
||
}
|
||
|
||
my $tmpDir = $ENV{'TMPDIR'} || "/tmp";
|
||
unless (defined $sharedDir) {
|
||
$sharedDir = $tmpDir . "/xchg-shared";
|
||
make_path($sharedDir, { mode => 0700, owner => $< });
|
||
}
|
||
|
||
my $allowReboot = 0;
|
||
$allowReboot = $args->{allowReboot} if defined $args->{allowReboot};
|
||
|
||
my $self = {
|
||
startCommand => $startCommand,
|
||
name => $name,
|
||
allowReboot => $allowReboot,
|
||
booted => 0,
|
||
pid => 0,
|
||
connected => 0,
|
||
socket => undef,
|
||
stateDir => "$tmpDir/vm-state-$name",
|
||
monitor => undef,
|
||
log => $args->{log},
|
||
redirectSerial => $args->{redirectSerial} // 1,
|
||
};
|
||
|
||
mkdir $self->{stateDir}, 0700;
|
||
|
||
bless $self, $class;
|
||
return $self;
|
||
}
|
||
|
||
|
||
sub log {
|
||
my ($self, $msg) = @_;
|
||
$self->{log}->log($msg, { machine => $self->{name} });
|
||
}
|
||
|
||
|
||
sub nest {
|
||
my ($self, $msg, $coderef, $attrs) = @_;
|
||
$self->{log}->nest($msg, $coderef, { %{$attrs || {}}, machine => $self->{name} });
|
||
}
|
||
|
||
|
||
sub name {
|
||
my ($self) = @_;
|
||
return $self->{name};
|
||
}
|
||
|
||
|
||
sub stateDir {
|
||
my ($self) = @_;
|
||
return $self->{stateDir};
|
||
}
|
||
|
||
|
||
sub start {
|
||
my ($self) = @_;
|
||
return if $self->{booted};
|
||
|
||
$self->log("starting vm");
|
||
|
||
# Create a socket pair for the serial line input/output of the VM.
|
||
my ($serialP, $serialC);
|
||
socketpair($serialP, $serialC, PF_UNIX, SOCK_STREAM, 0) or die;
|
||
|
||
# Create a Unix domain socket to which QEMU's monitor will connect.
|
||
my $monitorPath = $self->{stateDir} . "/monitor";
|
||
unlink $monitorPath;
|
||
my $monitorS;
|
||
socket($monitorS, PF_UNIX, SOCK_STREAM, 0) or die;
|
||
bind($monitorS, sockaddr_un($monitorPath)) or die "cannot bind monitor socket: $!";
|
||
listen($monitorS, 1) or die;
|
||
|
||
# Create a Unix domain socket to which the root shell in the guest will connect.
|
||
my $shellPath = $self->{stateDir} . "/shell";
|
||
unlink $shellPath;
|
||
my $shellS;
|
||
socket($shellS, PF_UNIX, SOCK_STREAM, 0) or die;
|
||
bind($shellS, sockaddr_un($shellPath)) or die "cannot bind shell socket: $!";
|
||
listen($shellS, 1) or die;
|
||
|
||
# Start the VM.
|
||
my $pid = fork();
|
||
die if $pid == -1;
|
||
|
||
if ($pid == 0) {
|
||
close $serialP;
|
||
close $monitorS;
|
||
close $shellS;
|
||
if ($self->{redirectSerial}) {
|
||
open NUL, "</dev/null" or die;
|
||
dup2(fileno(NUL), fileno(STDIN));
|
||
dup2(fileno($serialC), fileno(STDOUT));
|
||
dup2(fileno($serialC), fileno(STDERR));
|
||
}
|
||
$ENV{TMPDIR} = $self->{stateDir};
|
||
$ENV{SHARED_DIR} = $sharedDir;
|
||
$ENV{USE_TMPDIR} = 1;
|
||
$ENV{QEMU_OPTS} =
|
||
($self->{allowReboot} ? "" : "-no-reboot ") .
|
||
"-monitor unix:./monitor -chardev socket,id=shell,path=./shell " .
|
||
"-device virtio-serial -device virtconsole,chardev=shell " .
|
||
($showGraphics ? "-serial stdio" : "-nographic") . " " . ($ENV{QEMU_OPTS} || "");
|
||
chdir $self->{stateDir} or die;
|
||
exec $self->{startCommand};
|
||
die "running VM script: $!";
|
||
}
|
||
|
||
# Process serial line output.
|
||
close $serialC;
|
||
|
||
threads->create(\&processSerialOutput, $self, $serialP)->detach;
|
||
|
||
sub processSerialOutput {
|
||
my ($self, $serialP) = @_;
|
||
while (<$serialP>) {
|
||
chomp;
|
||
s/\r$//;
|
||
print STDERR $self->{name}, "# $_\n";
|
||
$self->{log}->{logQueue}->enqueue({msg => $_, machine => $self->{name}}); # !!!
|
||
}
|
||
}
|
||
|
||
eval {
|
||
local $SIG{CHLD} = sub { die "QEMU died prematurely\n"; };
|
||
|
||
# Wait until QEMU connects to the monitor.
|
||
accept($self->{monitor}, $monitorS) or die;
|
||
|
||
# Wait until QEMU connects to the root shell socket. QEMU
|
||
# does so immediately; this doesn't mean that the root shell
|
||
# has connected yet inside the guest.
|
||
accept($self->{socket}, $shellS) or die;
|
||
$self->{socket}->autoflush(1);
|
||
};
|
||
die "$@" if $@;
|
||
|
||
$self->waitForMonitorPrompt;
|
||
|
||
$self->log("QEMU running (pid $pid)");
|
||
|
||
$self->{pid} = $pid;
|
||
$self->{booted} = 1;
|
||
}
|
||
|
||
|
||
# Send a command to the monitor and wait for it to finish. TODO: QEMU
|
||
# also has a JSON-based monitor interface now, but it doesn't support
|
||
# all commands yet. We should use it once it does.
|
||
sub sendMonitorCommand {
|
||
my ($self, $command) = @_;
|
||
$self->log("sending monitor command: $command");
|
||
syswrite $self->{monitor}, "$command\n";
|
||
return $self->waitForMonitorPrompt;
|
||
}
|
||
|
||
|
||
# Wait until the monitor sends "(qemu) ".
|
||
sub waitForMonitorPrompt {
|
||
my ($self) = @_;
|
||
my $res = "";
|
||
my $s;
|
||
while (sysread($self->{monitor}, $s, 1024)) {
|
||
$res .= $s;
|
||
last if $res =~ s/\(qemu\) $//;
|
||
}
|
||
return $res;
|
||
}
|
||
|
||
|
||
# Call the given code reference repeatedly, with 1 second intervals,
|
||
# until it returns 1 or a timeout is reached.
|
||
sub retry {
|
||
my ($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->nest("waiting for the VM to finish booting", sub {
|
||
|
||
$self->start;
|
||
|
||
local $SIG{ALRM} = sub { die "timed out waiting for the VM to connect\n"; };
|
||
alarm 300;
|
||
readline $self->{socket} or die "the VM quit before connecting\n";
|
||
alarm 0;
|
||
|
||
$self->log("connected to guest root shell");
|
||
$self->{connected} = 1;
|
||
|
||
});
|
||
}
|
||
|
||
|
||
sub waitForShutdown {
|
||
my ($self) = @_;
|
||
return unless $self->{booted};
|
||
|
||
$self->nest("waiting for the VM to power off", sub {
|
||
waitpid $self->{pid}, 0;
|
||
$self->{pid} = 0;
|
||
$self->{booted} = 0;
|
||
$self->{connected} = 0;
|
||
});
|
||
}
|
||
|
||
|
||
sub isUp {
|
||
my ($self) = @_;
|
||
return $self->{booted} && $self->{connected};
|
||
}
|
||
|
||
|
||
sub execute_ {
|
||
my ($self, $command) = @_;
|
||
|
||
$self->connect;
|
||
|
||
print { $self->{socket} } ("( $command ); echo '|!=EOF' \$?\n");
|
||
|
||
my $out = "";
|
||
|
||
while (1) {
|
||
my $line = readline($self->{socket});
|
||
die "connection to VM lost unexpectedly" unless defined $line;
|
||
#$self->log("got line: $line");
|
||
if ($line =~ /^(.*)\|\!\=EOF\s+(\d+)$/) {
|
||
$out .= $1;
|
||
$self->log("exit status $2");
|
||
return ($2, $out);
|
||
}
|
||
$out .= $line;
|
||
}
|
||
}
|
||
|
||
|
||
sub execute {
|
||
my ($self, $command) = @_;
|
||
my @res;
|
||
$self->nest("running command: $command", sub {
|
||
@res = $self->execute_($command);
|
||
});
|
||
return @res;
|
||
}
|
||
|
||
|
||
sub succeed {
|
||
my ($self, @commands) = @_;
|
||
|
||
my $res;
|
||
foreach my $command (@commands) {
|
||
$self->nest("must succeed: $command", sub {
|
||
my ($status, $out) = $self->execute_($command);
|
||
if ($status != 0) {
|
||
$self->log("output: $out");
|
||
die "command `$command' did not succeed (exit code $status)\n";
|
||
}
|
||
$res .= $out;
|
||
});
|
||
}
|
||
|
||
return $res;
|
||
}
|
||
|
||
|
||
sub mustSucceed {
|
||
succeed @_;
|
||
}
|
||
|
||
|
||
sub waitUntilSucceeds {
|
||
my ($self, $command) = @_;
|
||
$self->nest("waiting for success: $command", sub {
|
||
retry sub {
|
||
my ($status, $out) = $self->execute($command);
|
||
return 1 if $status == 0;
|
||
};
|
||
});
|
||
}
|
||
|
||
|
||
sub waitUntilFails {
|
||
my ($self, $command) = @_;
|
||
$self->nest("waiting for failure: $command", sub {
|
||
retry sub {
|
||
my ($status, $out) = $self->execute($command);
|
||
return 1 if $status != 0;
|
||
};
|
||
});
|
||
}
|
||
|
||
|
||
sub fail {
|
||
my ($self, $command) = @_;
|
||
$self->nest("must fail: $command", sub {
|
||
my ($status, $out) = $self->execute_($command);
|
||
die "command `$command' unexpectedly succeeded"
|
||
if $status == 0;
|
||
});
|
||
}
|
||
|
||
|
||
sub mustFail {
|
||
fail @_;
|
||
}
|
||
|
||
|
||
sub getUnitInfo {
|
||
my ($self, $unit) = @_;
|
||
my ($status, $lines) = $self->execute("systemctl --no-pager show '$unit'");
|
||
return undef if $status != 0;
|
||
my $info = {};
|
||
foreach my $line (split '\n', $lines) {
|
||
$line =~ /^([^=]+)=(.*)$/ or next;
|
||
$info->{$1} = $2;
|
||
}
|
||
return $info;
|
||
}
|
||
|
||
|
||
# Wait for a systemd unit to reach the "active" state.
|
||
sub waitForUnit {
|
||
my ($self, $unit) = @_;
|
||
$self->nest("waiting for unit ‘$unit’", sub {
|
||
retry sub {
|
||
my $info = $self->getUnitInfo($unit);
|
||
my $state = $info->{ActiveState};
|
||
die "unit ‘$unit’ reached state ‘$state’\n" if $state eq "failed";
|
||
if ($state eq "inactive") {
|
||
# If there are no pending jobs, then assume this unit
|
||
# will never reach active state.
|
||
my ($status, $jobs) = $self->execute("systemctl list-jobs --full 2>&1");
|
||
if ($jobs =~ /No jobs/) { # FIXME: fragile
|
||
# Handle the case where the unit may have started
|
||
# between the previous getUnitInfo() and
|
||
# list-jobs.
|
||
my $info2 = $self->getUnitInfo($unit);
|
||
die "unit ‘$unit’ is inactive and there are no pending jobs\n"
|
||
if $info2->{ActiveState} eq $state;
|
||
}
|
||
}
|
||
return 1 if $state eq "active";
|
||
};
|
||
});
|
||
}
|
||
|
||
|
||
sub waitForJob {
|
||
my ($self, $jobName) = @_;
|
||
return $self->waitForUnit($jobName);
|
||
}
|
||
|
||
|
||
# Wait until the specified file exists.
|
||
sub waitForFile {
|
||
my ($self, $fileName) = @_;
|
||
$self->nest("waiting for file ‘$fileName’", sub {
|
||
retry sub {
|
||
my ($status, $out) = $self->execute("test -e $fileName");
|
||
return 1 if $status == 0;
|
||
}
|
||
});
|
||
}
|
||
|
||
sub startJob {
|
||
my ($self, $jobName) = @_;
|
||
$self->execute("systemctl start $jobName");
|
||
# FIXME: check result
|
||
}
|
||
|
||
sub stopJob {
|
||
my ($self, $jobName) = @_;
|
||
$self->execute("systemctl stop $jobName");
|
||
}
|
||
|
||
|
||
# Wait until the machine is listening on the given TCP port.
|
||
sub waitForOpenPort {
|
||
my ($self, $port) = @_;
|
||
$self->nest("waiting for TCP port $port", sub {
|
||
retry sub {
|
||
my ($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};
|
||
|
||
print { $self->{socket} } ("poweroff\n");
|
||
|
||
$self->waitForShutdown;
|
||
}
|
||
|
||
|
||
sub crash {
|
||
my ($self) = @_;
|
||
return unless $self->{booted};
|
||
|
||
$self->log("forced crash");
|
||
|
||
$self->sendMonitorCommand("quit");
|
||
|
||
$self->waitForShutdown;
|
||
}
|
||
|
||
|
||
# Make the machine unreachable by shutting down eth1 (the multicast
|
||
# interface used to talk to the other VMs). We keep eth0 up so that
|
||
# the test driver can continue to talk to the machine.
|
||
sub block {
|
||
my ($self) = @_;
|
||
$self->sendMonitorCommand("set_link virtio-net-pci.1 off");
|
||
}
|
||
|
||
|
||
# Make the machine reachable.
|
||
sub unblock {
|
||
my ($self) = @_;
|
||
$self->sendMonitorCommand("set_link virtio-net-pci.1 on");
|
||
}
|
||
|
||
|
||
# Take a screenshot of the X server on :0.0.
|
||
sub screenshot {
|
||
my ($self, $filename) = @_;
|
||
my $dir = $ENV{'out'} || Cwd::abs_path(".");
|
||
$filename = "$dir/${filename}.png" if $filename =~ /^\w+$/;
|
||
my $tmp = "${filename}.ppm";
|
||
my $name = basename($filename);
|
||
$self->nest("making screenshot ‘$name’", sub {
|
||
$self->sendMonitorCommand("screendump $tmp");
|
||
system("pnmtopng $tmp > ${filename}") == 0
|
||
or die "cannot convert screenshot";
|
||
unlink $tmp;
|
||
}, { image => $name } );
|
||
}
|
||
|
||
|
||
# Take a screenshot and return the result as text using optical character
|
||
# recognition.
|
||
sub getScreenText {
|
||
my ($self) = @_;
|
||
|
||
system("command -v tesseract &> /dev/null") == 0
|
||
or die "getScreenText used but enableOCR is false";
|
||
|
||
my $text;
|
||
$self->nest("performing optical character recognition", sub {
|
||
my $tmpbase = Cwd::abs_path(".")."/ocr";
|
||
my $tmpin = $tmpbase."in.ppm";
|
||
my $tmpout = "$tmpbase.ppm";
|
||
|
||
$self->sendMonitorCommand("screendump $tmpin");
|
||
system("ppmtopgm $tmpin | pamscale 4 -filter=lanczos > $tmpout") == 0
|
||
or die "cannot scale screenshot";
|
||
unlink $tmpin;
|
||
system("tesseract $tmpout $tmpbase") == 0 or die "OCR failed";
|
||
unlink $tmpout;
|
||
$text = read_file("$tmpbase.txt");
|
||
unlink "$tmpbase.txt";
|
||
});
|
||
return $text;
|
||
}
|
||
|
||
|
||
# Wait until a specific regexp matches the textual contents of the screen.
|
||
sub waitForText {
|
||
my ($self, $regexp) = @_;
|
||
$self->nest("waiting for $regexp to appear on the screen", sub {
|
||
retry sub {
|
||
return 1 if $self->getScreenText =~ /$regexp/;
|
||
}
|
||
});
|
||
}
|
||
|
||
|
||
# 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) = @_;
|
||
$self->nest("waiting for the X11 server", sub {
|
||
retry sub {
|
||
my ($status, $out) = $self->execute("journalctl -b SYSLOG_IDENTIFIER=systemd | grep 'session opened'");
|
||
return 0 if $status != 0;
|
||
($status, $out) = $self->execute("[ -e /tmp/.X11-unix/X0 ]");
|
||
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) = @_;
|
||
$self->nest("waiting for a window to appear", sub {
|
||
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' > $to"); # !!! escaping
|
||
}
|
||
|
||
|
||
sub sendKeys {
|
||
my ($self, @keys) = @_;
|
||
foreach my $key (@keys) {
|
||
$key = "spc" if $key eq " ";
|
||
$key = "ret" if $key eq "\n";
|
||
$self->sendMonitorCommand("sendkey $key");
|
||
}
|
||
}
|
||
|
||
|
||
sub sendChars {
|
||
my ($self, $chars) = @_;
|
||
$self->nest("sending keys ‘$chars’", sub {
|
||
$self->sendKeys(split //, $chars);
|
||
});
|
||
}
|
||
|
||
|
||
# Sleep N seconds (in virtual guest time, not real time).
|
||
sub sleep {
|
||
my ($self, $time) = @_;
|
||
$self->succeed("sleep $time");
|
||
}
|
||
|
||
|
||
# Forward a TCP port on the host to a TCP port on the guest. Useful
|
||
# during interactive testing.
|
||
sub forwardPort {
|
||
my ($self, $hostPort, $guestPort) = @_;
|
||
$hostPort = 8080 unless defined $hostPort;
|
||
$guestPort = 80 unless defined $guestPort;
|
||
$self->sendMonitorCommand("hostfwd_add tcp::$hostPort-:$guestPort");
|
||
}
|
||
|
||
|
||
1;
|