pyrox.dev
1{ config, pkgs, lib, ... }:
2
3let
4 inherit (lib) mkOption mkIf;
5
6 cfg = config.services.openafsClient;
7
8 cellServDB = pkgs.fetchurl {
9 url = http://dl.central.org/dl/cellservdb/CellServDB.2009-06-29;
10 sha256 = "be566f850e88130333ab8bc3462872ad90c9482e025c60a92f728b5bac1b4fa9";
11 };
12
13 afsConfig = pkgs.runCommand "afsconfig" {} ''
14 mkdir -p $out
15 echo ${cfg.cellName} > $out/ThisCell
16 cp ${cellServDB} $out/CellServDB
17 echo "/afs:${cfg.cacheDirectory}:${cfg.cacheSize}" > $out/cacheinfo
18 '';
19
20 openafsPkgs = config.boot.kernelPackages.openafsClient;
21in
22{
23 ###### interface
24
25 options = {
26
27 services.openafsClient = {
28
29 enable = mkOption {
30 default = false;
31 description = "Whether to enable the OpenAFS client.";
32 };
33
34 cellName = mkOption {
35 default = "grand.central.org";
36 description = "Cell name.";
37 };
38
39 cacheSize = mkOption {
40 default = "100000";
41 description = "Cache size.";
42 };
43
44 cacheDirectory = mkOption {
45 default = "/var/cache/openafs";
46 description = "Cache directory.";
47 };
48
49 crypt = mkOption {
50 default = false;
51 description = "Whether to enable (weak) protocol encryption.";
52 };
53
54 sparse = mkOption {
55 default = false;
56 description = "Minimal cell list in /afs.";
57 };
58
59 };
60 };
61
62
63 ###### implementation
64
65 config = mkIf cfg.enable {
66
67 environment.systemPackages = [ openafsPkgs ];
68
69 environment.etc = [
70 { source = afsConfig;
71 target = "openafs";
72 }
73 ];
74
75 systemd.services.afsd = {
76 description = "AFS client";
77 wantedBy = [ "multi-user.target" ];
78 after = [ "network-interfaces.target" ];
79
80 preStart = ''
81 mkdir -p -m 0755 /afs
82 mkdir -m 0700 -p ${cfg.cacheDirectory}
83 ${pkgs.module_init_tools}/sbin/insmod ${openafsPkgs}/lib/openafs/libafs-*.ko || true
84 ${openafsPkgs}/sbin/afsd -confdir ${afsConfig} -cachedir ${cfg.cacheDirectory} ${if cfg.sparse then "-dynroot-sparse" else "-dynroot"} -fakestat -afsdb
85 ${openafsPkgs}/bin/fs setcrypt ${if cfg.crypt then "on" else "off"}
86 '';
87
88 # Doing this in preStop, because after these commands AFS is basically
89 # stopped, so systemd has nothing to do, just noticing it. If done in
90 # postStop, then we get a hang + kernel oops, because AFS can't be
91 # stopped simply by sending signals to processes.
92 preStop = ''
93 ${pkgs.utillinux}/bin/umount /afs
94 ${openafsPkgs}/sbin/afsd -shutdown
95 ${pkgs.module_init_tools}/sbin/rmmod libafs
96 '';
97 };
98 };
99}