101 lines
2.6 KiB
Nix
101 lines
2.6 KiB
Nix
{ config, pkgs, lib, ... }:
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let
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inherit (lib) mkOption mkIf;
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cfg = config.services.openafsClient;
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cellServDB = pkgs.fetchurl {
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url = http://dl.central.org/dl/cellservdb/CellServDB.2009-06-29;
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sha256 = "be566f850e88130333ab8bc3462872ad90c9482e025c60a92f728b5bac1b4fa9";
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};
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afsConfig = pkgs.runCommand "afsconfig" {} ''
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mkdir -p $out
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echo ${cfg.cellName} > $out/ThisCell
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cp ${cellServDB} $out/CellServDB
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echo "/afs:${cfg.cacheDirectory}:${cfg.cacheSize}" > $out/cacheinfo
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'';
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openafsPkgs = config.boot.kernelPackages.openafsClient;
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in
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{
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###### interface
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options = {
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services.openafsClient = {
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enable = mkOption {
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default = false;
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description = "Whether to enable the OpenAFS client.";
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};
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cellName = mkOption {
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default = "grand.central.org";
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description = "Cell name.";
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};
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cacheSize = mkOption {
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default = "100000";
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description = "Cache size.";
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};
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cacheDirectory = mkOption {
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default = "/var/cache/openafs";
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description = "Cache directory.";
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};
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crypt = mkOption {
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default = false;
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description = "Whether to enable (weak) protocol encryption.";
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};
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sparse = mkOption {
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default = false;
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description = "Minimal cell list in /afs.";
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};
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};
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};
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###### implementation
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config = mkIf cfg.enable {
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environment.systemPackages = [ openafsPkgs ];
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environment.etc = [
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{ source = afsConfig;
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target = "openafs";
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}
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];
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systemd.services.afsd = {
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description = "AFS client";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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serviceConfig = { RemainAfterExit = true; };
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preStart = ''
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mkdir -p -m 0755 /afs
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mkdir -m 0700 -p ${cfg.cacheDirectory}
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${pkgs.kmod}/bin/insmod ${openafsPkgs}/lib/openafs/libafs-*.ko || true
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${openafsPkgs}/sbin/afsd -confdir ${afsConfig} -cachedir ${cfg.cacheDirectory} ${if cfg.sparse then "-dynroot-sparse" else "-dynroot"} -fakestat -afsdb
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${openafsPkgs}/bin/fs setcrypt ${if cfg.crypt then "on" else "off"}
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'';
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# Doing this in preStop, because after these commands AFS is basically
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# stopped, so systemd has nothing to do, just noticing it. If done in
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# postStop, then we get a hang + kernel oops, because AFS can't be
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# stopped simply by sending signals to processes.
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preStop = ''
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${pkgs.utillinux}/bin/umount /afs
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${openafsPkgs}/sbin/afsd -shutdown
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${pkgs.kmod}/sbin/rmmod libafs
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'';
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};
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};
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}
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