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Adding an option to luksroot, so it allows to define whether to launch cryptsetup after or before LVM.

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To allow dmcrypt over lvm and lvm over dmcrypt.


svn path=/nixos/trunk/; revision=32784
This commit is contained in:
Lluís Batlle i Rossell 2012-03-04 21:00:35 +00:00
parent 0d4eb37e16
commit 1adaabef58
1 changed files with 39 additions and 4 deletions
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43
modules/system/boot/luksroot.nix
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@ -5,7 +5,7 @@ with pkgs.lib;
let
luks = config.boot.initrd.luks;
openCommand = { name, device }: ''
openCommand = { name, device, ... }: ''
# Wait for luksRoot to appear, e.g. if on a usb drive.
# XXX: copied and adapted from stage-1-init.sh - should be
# available as a function.
@ -14,7 +14,7 @@ let
for ((try = 0; try < 10; try++)); do
sleep 1
if test -e ${device}; then break; fi
echo -n "OK"
echo -n .
done
echo "ok"
fi
@ -23,6 +23,10 @@ let
cryptsetup luksOpen ${device} ${name}
'';
isPreLVM = f: f.preLVM;
preLVM = filter isPreLVM luks.devices;
postLVM = filter (f: !(isPreLVM f)) luks.devices;
in
{
@ -36,7 +40,7 @@ in
boot.initrd.luks.devices = mkOption {
default = [ ];
example = [ { name = "luksroot"; device = "/dev/sda3"; } ];
example = [ { name = "luksroot"; device = "/dev/sda3"; preLVM = true; } ];
description = '';
The list of devices that should be decrypted using LUKS before trying to mount the
root partition. This works for both LVM-over-LUKS and LUKS-over-LVM setups.
@ -45,6 +49,36 @@ in
Make sure that initrd has the crypto modules needed for decryption.
'';
type = types.list types.optionSet;
options = {
name = mkOption {
example = "luksroot";
type = types.string;
description = ''
Name of the interface.
'';
};
device = mkOption {
example = "/dev/sda2";
type = types.string;
description = ''
IP address of the interface. Leave empty to configure the
interface using DHCP.
'';
};
preLVM = mkOption {
default = true;
type = types.bool;
description = ''
Whether the luksOpen will be attempted before LVM scan or after it.
'';
};
};
};
};
@ -68,6 +102,7 @@ in
$out/bin/cryptsetup --version
'';
boot.initrd.preLVMCommands = concatMapStrings openCommand luks.devices;
boot.initrd.preLVMCommands = concatMapStrings openCommand preLVM;
boot.initrd.postDeviceCommands = concatMapStrings openCommand postLVM;
};
}