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nixos/switch-to-configuration: Move handleModifiedUnit into a sub

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This commit is contained in:
Janne Heß 2021-12-08 13:14:40 +01:00
parent 9f329731b5
commit 393c721849
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GPG Key ID: 69165158F05265DF
1 changed files with 69 additions and 63 deletions
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132
nixos/modules/system/activation/switch-to-configuration.pl
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@ -146,6 +146,74 @@ sub fingerprintUnit {
return abs_path($s) . (-f "${s}.d/overrides.conf" ? " " . abs_path "${s}.d/overrides.conf" : "");
}
sub handleModifiedUnit {
my ($unit, $baseName, $newUnitFile, $activePrev, $unitsToStop, $unitsToStart, $unitsToReload, $unitsToRestart, $unitsToSkip) = @_;
if ($unit eq "sysinit.target" || $unit eq "basic.target" || $unit eq "multi-user.target" || $unit eq "graphical.target" || $unit =~ /\.path$/ || $unit =~ /\.slice$/) {
# Do nothing. These cannot be restarted directly.
# Slices and Paths don't have to be restarted since
# properties (resource limits and inotify watches)
# seem to get applied on daemon-reload.
} elsif ($unit =~ /\.mount$/) {
# Reload the changed mount unit to force a remount.
$unitsToReload->{$unit} = 1;
recordUnit($reloadListFile, $unit);
} elsif ($unit =~ /\.socket$/) {
# FIXME: do something?
} else {
my $unitInfo = parseUnit($newUnitFile);
if (boolIsTrue($unitInfo->{'X-ReloadIfChanged'} // "no")) {
$unitsToReload->{$unit} = 1;
recordUnit($reloadListFile, $unit);
}
elsif (!boolIsTrue($unitInfo->{'X-RestartIfChanged'} // "yes") || boolIsTrue($unitInfo->{'RefuseManualStop'} // "no") || boolIsTrue($unitInfo->{'X-OnlyManualStart'} // "no")) {
$unitsToSkip->{$unit} = 1;
} else {
if (!boolIsTrue($unitInfo->{'X-StopIfChanged'} // "yes")) {
# This unit should be restarted instead of
# stopped and started.
$unitsToRestart->{$unit} = 1;
recordUnit($restartListFile, $unit);
} else {
# If this unit is socket-activated, then stop the
# socket unit(s) as well, and restart the
# socket(s) instead of the service.
my $socketActivated = 0;
if ($unit =~ /\.service$/) {
my @sockets = split / /, ($unitInfo->{Sockets} // "");
if (scalar @sockets == 0) {
@sockets = ("$baseName.socket");
}
foreach my $socket (@sockets) {
if (defined $activePrev->{$socket}) {
$unitsToStop->{$socket} = 1;
# Only restart sockets that actually
# exist in new configuration:
if (-e "$out/etc/systemd/system/$socket") {
$unitsToStart->{$socket} = 1;
recordUnit($startListFile, $socket);
$socketActivated = 1;
}
}
}
}
# If the unit is not socket-activated, record
# that this unit needs to be started below.
# We write this to a file to ensure that the
# service gets restarted if we're interrupted.
if (!$socketActivated) {
$unitsToStart->{$unit} = 1;
recordUnit($startListFile, $unit);
}
$unitsToStop->{$unit} = 1;
}
}
}
}
# Figure out what units need to be stopped, started, restarted or reloaded.
my (%unitsToStop, %unitsToSkip, %unitsToStart, %unitsToRestart, %unitsToReload);
@ -218,69 +286,7 @@ while (my ($unit, $state) = each %{$activePrev}) {
}
elsif (fingerprintUnit($prevUnitFile) ne fingerprintUnit($newUnitFile)) {
if ($unit eq "sysinit.target" || $unit eq "basic.target" || $unit eq "multi-user.target" || $unit eq "graphical.target" || $unit =~ /\.path$/ || $unit =~ /\.slice$/) {
# Do nothing. These cannot be restarted directly.
# Slices and Paths don't have to be restarted since
# properties (resource limits and inotify watches)
# seem to get applied on daemon-reload.
} elsif ($unit =~ /\.mount$/) {
# Reload the changed mount unit to force a remount.
$unitsToReload{$unit} = 1;
recordUnit($reloadListFile, $unit);
} elsif ($unit =~ /\.socket$/) {
# FIXME: do something?
} else {
my $unitInfo = parseUnit($newUnitFile);
if (boolIsTrue($unitInfo->{'X-ReloadIfChanged'} // "no")) {
$unitsToReload{$unit} = 1;
recordUnit($reloadListFile, $unit);
}
elsif (!boolIsTrue($unitInfo->{'X-RestartIfChanged'} // "yes") || boolIsTrue($unitInfo->{'RefuseManualStop'} // "no") || boolIsTrue($unitInfo->{'X-OnlyManualStart'} // "no")) {
$unitsToSkip{$unit} = 1;
} else {
if (!boolIsTrue($unitInfo->{'X-StopIfChanged'} // "yes")) {
# This unit should be restarted instead of
# stopped and started.
$unitsToRestart{$unit} = 1;
recordUnit($restartListFile, $unit);
} else {
# If this unit is socket-activated, then stop the
# socket unit(s) as well, and restart the
# socket(s) instead of the service.
my $socketActivated = 0;
if ($unit =~ /\.service$/) {
my @sockets = split / /, ($unitInfo->{Sockets} // "");
if (scalar @sockets == 0) {
@sockets = ("$baseName.socket");
}
foreach my $socket (@sockets) {
if (defined $activePrev->{$socket}) {
$unitsToStop{$socket} = 1;
# Only restart sockets that actually
# exist in new configuration:
if (-e "$out/etc/systemd/system/$socket") {
$unitsToStart{$socket} = 1;
recordUnit($startListFile, $socket);
$socketActivated = 1;
}
}
}
}
# If the unit is not socket-activated, record
# that this unit needs to be started below.
# We write this to a file to ensure that the
# service gets restarted if we're interrupted.
if (!$socketActivated) {
$unitsToStart{$unit} = 1;
recordUnit($startListFile, $unit);
}
$unitsToStop{$unit} = 1;
}
}
}
handleModifiedUnit($unit, $baseName, $newUnitFile, $activePrev, \%unitsToStop, \%unitsToStart, \%unitsToReload, \%unitsToRestart, \%unitsToSkip);
}
}
}