84 lines
2.9 KiB
Nix
84 lines
2.9 KiB
Nix
{ config, lib, pkgs, utils, ... }:
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with lib;
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let
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bootFs = filterAttrs (n: fs: (fs.fsType == "bcachefs") && (utils.fsNeededForBoot fs)) config.fileSystems;
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mountCommand = pkgs.runCommand "mount.bcachefs" {} ''
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mkdir -p $out/bin
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cat > $out/bin/mount.bcachefs <<EOF
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#!/bin/sh
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exec "/bin/bcachefs" mount "\$@"
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EOF
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chmod +x $out/bin/mount.bcachefs
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'';
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commonFunctions = ''
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prompt() {
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local name="$1"
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printf "enter passphrase for $name: "
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}
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tryUnlock() {
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local name="$1"
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local path="$2"
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if bcachefs unlock -c $path > /dev/null 2> /dev/null; then # test for encryption
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prompt $name
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until bcachefs unlock $path 2> /dev/null; do # repeat until successfully unlocked
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printf "unlocking failed!\n"
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prompt $name
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done
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printf "unlocking successful.\n"
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fi
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}
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'';
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openCommand = name: fs:
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let
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# we need only unlock one device manually, and cannot pass multiple at once
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# remove this adaptation when bcachefs implements mounting by filesystem uuid
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# also, implement automatic waiting for the constituent devices when that happens
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# bcachefs does not support mounting devices with colons in the path, ergo we don't (see #49671)
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firstDevice = head (splitString ":" fs.device);
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in
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''
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tryUnlock ${name} ${firstDevice}
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'';
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in
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{
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config = mkIf (elem "bcachefs" config.boot.supportedFilesystems) (mkMerge [
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{
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# We do not want to include bachefs in the fsPackages for systemd-initrd
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# because we provide the unwrapped version of mount.bcachefs
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# through the extraBin option, which will make it available for use.
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system.fsPackages = lib.optional (!config.boot.initrd.systemd.enable) pkgs.bcachefs-tools;
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environment.systemPackages = lib.optional (config.boot.initrd.systemd.enable) pkgs.bcachefs-tools;
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# use kernel package with bcachefs support until it's in mainline
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boot.kernelPackages = pkgs.linuxPackages_testing_bcachefs;
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}
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(mkIf ((elem "bcachefs" config.boot.initrd.supportedFilesystems) || (bootFs != {})) {
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# chacha20 and poly1305 are required only for decryption attempts
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boot.initrd.availableKernelModules = [ "bcachefs" "sha256" "chacha20" "poly1305" ];
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boot.initrd.systemd.extraBin = {
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"bcachefs" = "${pkgs.bcachefs-tools}/bin/bcachefs";
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"mount.bcachefs" = "${mountCommand}/bin/mount.bcachefs";
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};
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boot.initrd.extraUtilsCommands = lib.mkIf (!config.boot.initrd.systemd.enable) ''
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copy_bin_and_libs ${pkgs.bcachefs-tools}/bin/bcachefs
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copy_bin_and_libs ${mountCommand}/bin/mount.bcachefs
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'';
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boot.initrd.extraUtilsCommandsTest = ''
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$out/bin/bcachefs version
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'';
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boot.initrd.postDeviceCommands = commonFunctions + concatStrings (mapAttrsToList openCommand bootFs);
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})
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]);
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}
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