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nixpkgs/nixos/modules/system/boot/systemd-lib.nix
aszlig 4cdb4a4fef
networkd: Fix evaluation of systemd.network units.
During the refactor of the networkd stuff in f8dbe5f, a lot of the
options are now needed by systemd.nix as well as networkd.nix but
weren't moved by that commit as well.

For now, this fixes all networkd VM tests except for the macvlan one and
thus it should fix #7505 for at least DHCP-based configuration.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
2015-04-30 06:49:10 +02:00

182 lines
5.7 KiB
Nix

{ config, lib, pkgs }:
with lib;
let cfg = config.systemd; in
rec {
shellEscape = s: (replaceChars [ "\\" ] [ "\\\\" ] s);
makeUnit = name: unit:
let
pathSafeName = lib.replaceChars ["@" ":" "\\"] ["-" "-" "-"] name;
in
if unit.enable then
pkgs.runCommand "unit-${pathSafeName}" { preferLocalBuild = true; inherit (unit) text; }
''
mkdir -p $out
echo -n "$text" > $out/${shellEscape name}
''
else
pkgs.runCommand "unit-${pathSafeName}-disabled" { preferLocalBuild = true; }
''
mkdir -p $out
ln -s /dev/null $out/${shellEscape name}
'';
boolValues = [true false "yes" "no"];
digits = map toString (range 0 9);
isByteFormat = s:
let
l = reverseList (stringToCharacters s);
suffix = head l;
nums = tail l;
in elem suffix (["K" "M" "G" "T"] ++ digits)
&& all (num: elem num digits) nums;
assertByteFormat = name: group: attr:
optional (attr ? ${name} && ! isByteFormat attr.${name})
"Systemd ${group} field `${name}' must be in byte format [0-9]+[KMGT].";
hexChars = stringToCharacters "0123456789abcdefABCDEF";
isMacAddress = s: stringLength s == 17
&& flip all (splitString ":" s) (bytes:
all (byte: elem byte hexChars) (stringToCharacters bytes)
);
assertMacAddress = name: group: attr:
optional (attr ? ${name} && ! isMacAddress attr.${name})
"Systemd ${group} field `${name}' must be a valid mac address.";
assertValueOneOf = name: values: group: attr:
optional (attr ? ${name} && !elem attr.${name} values)
"Systemd ${group} field `${name}' cannot have value `${attr.${name}}'.";
assertHasField = name: group: attr:
optional (!(attr ? ${name}))
"Systemd ${group} field `${name}' must exist.";
assertRange = name: min: max: group: attr:
optional (attr ? ${name} && !(min <= attr.${name} && max >= attr.${name}))
"Systemd ${group} field `${name}' is outside the range [${toString min},${toString max}]";
assertOnlyFields = fields: group: attr:
let badFields = filter (name: ! elem name fields) (attrNames attr); in
optional (badFields != [ ])
"Systemd ${group} has extra fields [${concatStringsSep " " badFields}].";
checkUnitConfig = group: checks: v:
let errors = concatMap (c: c group v) checks; in
if errors == [] then true
else builtins.trace (concatStringsSep "\n" errors) false;
toOption = x:
if x == true then "true"
else if x == false then "false"
else toString x;
attrsToSection = as:
concatStrings (concatLists (mapAttrsToList (name: value:
map (x: ''
${name}=${toOption x}
'')
(if isList value then value else [value]))
as));
generateUnits = type: units: upstreamUnits: upstreamWants:
pkgs.runCommand "${type}-units" { preferLocalBuild = true; } ''
mkdir -p $out
# Copy the upstream systemd units we're interested in.
for i in ${toString upstreamUnits}; do
fn=${cfg.package}/example/systemd/${type}/$i
if ! [ -e $fn ]; then echo "missing $fn"; false; fi
if [ -L $fn ]; then
target="$(readlink "$fn")"
if [ ''${target:0:3} = ../ ]; then
ln -s "$(readlink -f "$fn")" $out/
else
cp -pd $fn $out/
fi
else
ln -s $fn $out/
fi
done
# Copy .wants links, but only those that point to units that
# we're interested in.
for i in ${toString upstreamWants}; do
fn=${cfg.package}/example/systemd/${type}/$i
if ! [ -e $fn ]; then echo "missing $fn"; false; fi
x=$out/$(basename $fn)
mkdir $x
for i in $fn/*; do
y=$x/$(basename $i)
cp -pd $i $y
if ! [ -e $y ]; then rm $y; fi
done
done
# Symlink all units provided listed in systemd.packages.
for i in ${toString cfg.packages}; do
for fn in $i/etc/systemd/${type}/* $i/lib/systemd/${type}/*; do
if ! [[ "$fn" =~ .wants$ ]]; then
ln -s $fn $out/
fi
done
done
# Symlink all units defined by systemd.units. If these are also
# provided by systemd or systemd.packages, then add them as
# <unit-name>.d/overrides.conf, which makes them extend the
# upstream unit.
for i in ${toString (mapAttrsToList (n: v: v.unit) units)}; do
fn=$(basename $i/*)
if [ -e $out/$fn ]; then
if [ "$(readlink -f $i/$fn)" = /dev/null ]; then
ln -sfn /dev/null $out/$fn
else
mkdir $out/$fn.d
ln -s $i/$fn $out/$fn.d/overrides.conf
fi
else
ln -fs $i/$fn $out/
fi
done
# Created .wants and .requires symlinks from the wantedBy and
# requiredBy options.
${concatStrings (mapAttrsToList (name: unit:
concatMapStrings (name2: ''
mkdir -p $out/'${name2}.wants'
ln -sfn '../${name}' $out/'${name2}.wants'/
'') unit.wantedBy) units)}
${concatStrings (mapAttrsToList (name: unit:
concatMapStrings (name2: ''
mkdir -p $out/'${name2}.requires'
ln -sfn '../${name}' $out/'${name2}.requires'/
'') unit.requiredBy) units)}
${optionalString (type == "system") ''
# Stupid misc. symlinks.
ln -s ${cfg.defaultUnit} $out/default.target
ln -s rescue.target $out/kbrequest.target
mkdir -p $out/getty.target.wants/
ln -s ../autovt@tty1.service $out/getty.target.wants/
ln -s ../local-fs.target ../remote-fs.target ../network.target \
../nss-lookup.target ../nss-user-lookup.target ../swap.target \
$out/multi-user.target.wants/
''}
''; # */
}