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351f5fc585
This includes fuse-common (fusePackages.fuse_3.common) as recommended by upstream. But while fuse(2) and fuse3 would normally depend on fuse-common we can't do that in nixpkgs while fuse-common is just another output from the fuse3 multiple-output derivation (i.e. this would result in a circular dependency). To avoid building fuse3 twice I decided it would be best to copy the shared files (i.e. the ones provided by fuse(2) and fuse3) from fuse-common to fuse (version 2) and avoid collision warnings by defining priorities. Now it should be possible to install an arbitrary combination of "fuse", "fuse3", and "fuse-common" without getting any collision warnings. The end result should be the same and all changes should be backwards compatible (assuming that mount.fuse from fuse3 is backwards compatible as stated by upstream [0] - if not this might break some /etc/fstab definitions but that should be very unlikely). My tests with sshfs (version 2 and 3) didn't show any problems. See #28409 for some additional information. [0]: https://github.com/libfuse/libfuse/releases/tag/fuse-3.0.0
311 lines
11 KiB
Nix
311 lines
11 KiB
Nix
{ config, lib, pkgs, utils, ... }:
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with lib;
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with utils;
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let
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addCheckDesc = desc: elemType: check: types.addCheck elemType check
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// { description = "${elemType.description} (with check: ${desc})"; };
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nonEmptyStr = addCheckDesc "non-empty" types.str
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(x: x != "" && ! (all (c: c == " " || c == "\t") (stringToCharacters x)));
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fileSystems' = toposort fsBefore (attrValues config.fileSystems);
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fileSystems = if fileSystems' ? "result"
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then # use topologically sorted fileSystems everywhere
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fileSystems'.result
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else # the assertion below will catch this,
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# but we fall back to the original order
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# anyway so that other modules could check
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# their assertions too
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(attrValues config.fileSystems);
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prioOption = prio: optionalString (prio != null) " pri=${toString prio}";
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specialFSTypes = [ "proc" "sysfs" "tmpfs" "ramfs" "devtmpfs" "devpts" ];
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coreFileSystemOpts = { name, config, ... }: {
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options = {
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mountPoint = mkOption {
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example = "/mnt/usb";
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type = nonEmptyStr;
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description = "Location of the mounted the file system.";
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};
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device = mkOption {
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default = null;
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example = "/dev/sda";
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type = types.nullOr nonEmptyStr;
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description = "Location of the device.";
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};
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fsType = mkOption {
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default = "auto";
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example = "ext3";
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type = nonEmptyStr;
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description = "Type of the file system.";
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};
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options = mkOption {
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default = [ "defaults" ];
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example = [ "data=journal" ];
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description = "Options used to mount the file system.";
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type = types.listOf nonEmptyStr;
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};
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};
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config = {
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mountPoint = mkDefault name;
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device = mkIf (elem config.fsType specialFSTypes) (mkDefault config.fsType);
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};
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};
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fileSystemOpts = { config, ... }: {
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options = {
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label = mkOption {
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default = null;
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example = "root-partition";
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type = types.nullOr nonEmptyStr;
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description = "Label of the device (if any).";
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};
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autoFormat = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If the device does not currently contain a filesystem (as
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determined by <command>blkid</command>, then automatically
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format it with the filesystem type specified in
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<option>fsType</option>. Use with caution.
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'';
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};
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formatOptions = mkOption {
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default = "";
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type = types.str;
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description = ''
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If <option>autoFormat</option> option is set specifies
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extra options passed to mkfs.
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'';
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};
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autoResize = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If set, the filesystem is grown to its maximum size before
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being mounted. (This is typically the size of the containing
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partition.) This is currently only supported for ext2/3/4
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filesystems that are mounted during early boot.
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'';
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};
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noCheck = mkOption {
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default = false;
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type = types.bool;
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description = "Disable running fsck on this filesystem.";
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};
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};
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config = {
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options = mkIf config.autoResize [ "x-nixos.autoresize" ];
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# -F needed to allow bare block device without partitions
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formatOptions = mkIf ((builtins.substring 0 3 config.fsType) == "ext") (mkDefault "-F");
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};
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};
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# Makes sequence of `specialMount device mountPoint options fsType` commands.
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# `systemMount` should be defined in the sourcing script.
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makeSpecialMounts = mounts:
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pkgs.writeText "mounts.sh" (concatMapStringsSep "\n" (mount: ''
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specialMount "${mount.device}" "${mount.mountPoint}" "${concatStringsSep "," mount.options}" "${mount.fsType}"
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'') mounts);
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in
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{
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###### interface
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options = {
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fileSystems = mkOption {
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default = {};
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example = literalExample ''
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{
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"/".device = "/dev/hda1";
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"/data" = {
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device = "/dev/hda2";
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fsType = "ext3";
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options = [ "data=journal" ];
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};
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"/bigdisk".label = "bigdisk";
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}
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'';
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type = types.loaOf (types.submodule [coreFileSystemOpts fileSystemOpts]);
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description = ''
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The file systems to be mounted. It must include an entry for
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the root directory (<literal>mountPoint = "/"</literal>). Each
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entry in the list is an attribute set with the following fields:
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<literal>mountPoint</literal>, <literal>device</literal>,
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<literal>fsType</literal> (a file system type recognised by
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<command>mount</command>; defaults to
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<literal>"auto"</literal>), and <literal>options</literal>
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(the mount options passed to <command>mount</command> using the
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<option>-o</option> flag; defaults to <literal>[ "defaults" ]</literal>).
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Instead of specifying <literal>device</literal>, you can also
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specify a volume label (<literal>label</literal>) for file
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systems that support it, such as ext2/ext3 (see <command>mke2fs
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-L</command>).
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'';
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};
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system.fsPackages = mkOption {
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internal = true;
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default = [ ];
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description = "Packages supplying file system mounters and checkers.";
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};
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boot.supportedFilesystems = mkOption {
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default = [ ];
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example = [ "btrfs" ];
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type = types.listOf types.str;
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description = "Names of supported filesystem types.";
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};
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boot.specialFileSystems = mkOption {
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default = {};
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type = types.loaOf (types.submodule coreFileSystemOpts);
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internal = true;
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description = ''
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Special filesystems that are mounted very early during boot.
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'';
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};
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};
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###### implementation
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config = {
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assertions = let
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ls = sep: concatMapStringsSep sep (x: x.mountPoint);
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in [
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{ assertion = ! (fileSystems' ? "cycle");
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message = "The ‘fileSystems’ option can't be topologically sorted: mountpoint dependency path ${ls " -> " fileSystems'.cycle} loops to ${ls ", " fileSystems'.loops}";
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}
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];
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# Export for use in other modules
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system.build.fileSystems = fileSystems;
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system.build.earlyMountScript = makeSpecialMounts (toposort fsBefore (attrValues config.boot.specialFileSystems)).result;
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boot.supportedFilesystems = map (fs: fs.fsType) fileSystems;
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# Add the mount helpers to the system path so that `mount' can find them.
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system.fsPackages = [ pkgs.dosfstools ];
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environment.systemPackages = with pkgs; [ fuse3 fuse ] ++ config.system.fsPackages;
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environment.etc.fstab.text =
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let
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fsToSkipCheck = [ "none" "bindfs" "btrfs" "zfs" "tmpfs" "nfs" "vboxsf" "glusterfs" ];
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skipCheck = fs: fs.noCheck || fs.device == "none" || builtins.elem fs.fsType fsToSkipCheck;
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in ''
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# This is a generated file. Do not edit!
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#
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# To make changes, edit the fileSystems and swapDevices NixOS options
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# in your /etc/nixos/configuration.nix file.
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# Filesystems.
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${concatMapStrings (fs:
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(if fs.device != null then fs.device
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else if fs.label != null then "/dev/disk/by-label/${fs.label}"
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else throw "No device specified for mount point ‘${fs.mountPoint}’.")
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+ " " + fs.mountPoint
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+ " " + fs.fsType
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+ " " + builtins.concatStringsSep "," fs.options
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+ " 0"
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+ " " + (if skipCheck fs then "0" else
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if fs.mountPoint == "/" then "1" else "2")
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+ "\n"
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) fileSystems}
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# Swap devices.
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${flip concatMapStrings config.swapDevices (sw:
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"${sw.realDevice} none swap${prioOption sw.priority}\n"
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)}
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'';
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# Provide a target that pulls in all filesystems.
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systemd.targets.fs =
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{ description = "All File Systems";
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wants = [ "local-fs.target" "remote-fs.target" ];
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};
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# Emit systemd services to format requested filesystems.
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systemd.services =
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let
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formatDevice = fs:
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let
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mountPoint' = "${escapeSystemdPath fs.mountPoint}.mount";
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device' = escapeSystemdPath fs.device;
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device'' = "${device'}.device";
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in nameValuePair "mkfs-${device'}"
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{ description = "Initialisation of Filesystem ${fs.device}";
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wantedBy = [ mountPoint' ];
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before = [ mountPoint' "systemd-fsck@${device'}.service" ];
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requires = [ device'' ];
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after = [ device'' ];
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path = [ pkgs.utillinux ] ++ config.system.fsPackages;
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script =
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''
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if ! [ -e "${fs.device}" ]; then exit 1; fi
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# FIXME: this is scary. The test could be more robust.
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type=$(blkid -p -s TYPE -o value "${fs.device}" || true)
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if [ -z "$type" ]; then
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echo "creating ${fs.fsType} filesystem on ${fs.device}..."
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mkfs.${fs.fsType} ${fs.formatOptions} "${fs.device}"
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fi
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'';
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unitConfig.RequiresMountsFor = [ "${dirOf fs.device}" ];
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unitConfig.DefaultDependencies = false; # needed to prevent a cycle
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serviceConfig.Type = "oneshot";
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};
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in listToAttrs (map formatDevice (filter (fs: fs.autoFormat) fileSystems));
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# Sync mount options with systemd's src/core/mount-setup.c: mount_table.
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boot.specialFileSystems = {
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"/proc" = { fsType = "proc"; options = [ "nosuid" "noexec" "nodev" ]; };
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"/run" = { fsType = "tmpfs"; options = [ "nosuid" "nodev" "strictatime" "mode=755" "size=${config.boot.runSize}" ]; };
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"/dev" = { fsType = "devtmpfs"; options = [ "nosuid" "strictatime" "mode=755" "size=${config.boot.devSize}" ]; };
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"/dev/shm" = { fsType = "tmpfs"; options = [ "nosuid" "nodev" "strictatime" "mode=1777" "size=${config.boot.devShmSize}" ]; };
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"/dev/pts" = { fsType = "devpts"; options = [ "nosuid" "noexec" "mode=620" "ptmxmode=0666" "gid=${toString config.ids.gids.tty}" ]; };
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# To hold secrets that shouldn't be written to disk (generally used for NixOps, harmless elsewhere)
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"/run/keys" = { fsType = "ramfs"; options = [ "nosuid" "nodev" "mode=750" "gid=${toString config.ids.gids.keys}" ]; };
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} // optionalAttrs (!config.boot.isContainer) {
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# systemd-nspawn populates /sys by itself, and remounting it causes all
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# kinds of weird issues (most noticeably, waiting for host disk device
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# nodes).
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"/sys" = { fsType = "sysfs"; options = [ "nosuid" "noexec" "nodev" ]; };
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};
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};
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}
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