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|
{ config, lib, pkgs, utils, ... }:
with lib;
with utils;
let
fileSystems = attrValues config.fileSystems;
prioOption = prio: optionalString (prio !=null) " pri=${toString prio}";
fileSystemOpts = { name, config, ... }: {
options = {
mountPoint = mkOption {
example = "/mnt/usb";
type = types.str;
description = "Location of the mounted the file system.";
};
device = mkOption {
default = null;
example = "/dev/sda";
type = types.uniq (types.nullOr types.string);
description = "Location of the device.";
};
label = mkOption {
default = null;
example = "root-partition";
type = types.uniq (types.nullOr types.string);
description = "Label of the device (if any).";
};
fsType = mkOption {
default = "auto";
example = "ext3";
type = types.str;
description = "Type of the file system.";
};
options = mkOption {
default = "defaults,relatime";
example = "data=journal";
type = types.commas;
description = "Options used to mount the file system.";
};
autoFormat = mkOption {
default = false;
type = types.bool;
description = ''
If the device does not currently contain a filesystem (as
determined by <command>blkid</command>, then automatically
format it with the filesystem type specified in
<option>fsType</option>. Use with caution.
'';
};
noCheck = mkOption {
default = false;
type = types.bool;
description = "Disable running fsck on this filesystem.";
};
};
config = {
mountPoint = mkDefault name;
device = mkIf (config.fsType == "tmpfs") (mkDefault config.fsType);
};
};
in
{
###### interface
options = {
fileSystems = mkOption {
default = {};
example = {
"/".device = "/dev/hda1";
"/data" = {
device = "/dev/hda2";
fsType = "ext3";
options = "data=journal";
};
"/bigdisk".label = "bigdisk";
};
type = types.loaOf types.optionSet;
options = [ fileSystemOpts ];
description = ''
The file systems to be mounted. It must include an entry for
the root directory (<literal>mountPoint = "/"</literal>). Each
entry in the list is an attribute set with the following fields:
<literal>mountPoint</literal>, <literal>device</literal>,
<literal>fsType</literal> (a file system type recognised by
<command>mount</command>; defaults to
<literal>"auto"</literal>), and <literal>options</literal>
(the mount options passed to <command>mount</command> using the
<option>-o</option> flag; defaults to <literal>"defaults"</literal>).
Instead of specifying <literal>device</literal>, you can also
specify a volume label (<literal>label</literal>) for file
systems that support it, such as ext2/ext3 (see <command>mke2fs
-L</command>).
'';
};
system.fsPackages = mkOption {
internal = true;
default = [ ];
description = "Packages supplying file system mounters and checkers.";
};
boot.supportedFilesystems = mkOption {
default = [ ];
example = [ "btrfs" ];
type = types.listOf types.string;
description = "Names of supported filesystem types.";
};
};
###### implementation
config = {
boot.supportedFilesystems = map (fs: fs.fsType) fileSystems;
# Add the mount helpers to the system path so that `mount' can find them.
system.fsPackages = [ pkgs.dosfstools ];
environment.systemPackages =
[ pkgs.ntfs3g pkgs.fuse ]
++ config.system.fsPackages;
environment.etc.fstab.text =
''
# This is a generated file. Do not edit!
# Filesystems.
${flip concatMapStrings fileSystems (fs:
(if fs.device != null then fs.device
else if fs.label != null then "/dev/disk/by-label/${fs.label}"
else throw "No device specified for mount point ‘${fs.mountPoint}’.")
+ " " + fs.mountPoint
+ " " + fs.fsType
+ " " + fs.options
+ " 0"
+ " " + (if fs.fsType == "none" || fs.device == "none" || fs.fsType == "btrfs" || fs.fsType == "tmpfs" || fs.noCheck then "0" else
if fs.mountPoint == "/" then "1" else "2")
+ "\n"
)}
# Swap devices.
${flip concatMapStrings config.swapDevices (sw:
"${sw.device} none swap${prioOption sw.priority}\n"
)}
'';
# Provide a target that pulls in all filesystems.
systemd.targets.fs =
{ description = "All File Systems";
wants = [ "local-fs.target" "remote-fs.target" ];
};
# Emit systemd services to format requested filesystems.
systemd.services =
let
formatDevice = fs:
let
mountPoint' = escapeSystemdPath fs.mountPoint;
device' = escapeSystemdPath fs.device;
# -F needed to allow bare block device without partitions
mkfsOpts = optional ((builtins.substring 0 3 fs.fsType) == "ext") "-F";
in nameValuePair "mkfs-${device'}"
{ description = "Initialisation of Filesystem ${fs.device}";
wantedBy = [ "${mountPoint'}.mount" ];
before = [ "${mountPoint'}.mount" "systemd-fsck@${device'}.service" ];
requires = [ "${device'}.device" ];
after = [ "${device'}.device" ];
path = [ pkgs.utillinux ] ++ config.system.fsPackages;
script =
''
if ! [ -e "${fs.device}" ]; then exit 1; fi
# FIXME: this is scary. The test could be more robust.
type=$(blkid -p -s TYPE -o value "${fs.device}" || true)
if [ -z "$type" ]; then
echo "creating ${fs.fsType} filesystem on ${fs.device}..."
mkfs.${fs.fsType} ${concatStringsSep " " mkfsOpts} "${fs.device}"
fi
'';
unitConfig.RequiresMountsFor = [ "${dirOf fs.device}" ];
unitConfig.DefaultDependencies = false; # needed to prevent a cycle
serviceConfig.Type = "oneshot";
};
in listToAttrs (map formatDevice (filter (fs: fs.autoFormat) fileSystems));
};
}
|