tjh.dev
1{
2 stdenv,
3 lib,
4 python3,
5 kernel,
6 makeWrapper,
7 writeText,
8 gawk,
9 iproute2,
10}:
11
12let
13 libexec = "libexec/hypervkvpd";
14
15 fcopy_name =
16 if lib.versionOlder kernel.version "6.10" then
17 "fcopy"
18 else
19 # The fcopy program is explicitly left out in the Makefile on aarch64
20 (if stdenv.hostPlatform.isAarch64 then null else "fcopy_uio");
21
22 daemons = stdenv.mkDerivation {
23 pname = "hyperv-daemons-bin";
24 inherit (kernel) src version;
25
26 nativeBuildInputs = [ makeWrapper ];
27 buildInputs = [ python3 ];
28
29 postPatch = ''
30 cd tools/hv
31 substituteInPlace hv_kvp_daemon.c \
32 --replace /usr/libexec/hypervkvpd/ $out/${libexec}/
33 '';
34
35 makeFlags = [
36 "ARCH=${stdenv.hostPlatform.parsed.cpu.name}"
37 "DESTDIR=$(out)"
38 "sbindir=/bin"
39 "libexecdir=/libexec"
40 ];
41
42 postFixup = ''
43 wrapProgram $out/bin/hv_kvp_daemon \
44 --prefix PATH : $out/bin:${
45 lib.makeBinPath [
46 gawk
47 iproute2
48 ]
49 }
50 '';
51 };
52
53 service =
54 bin: title: check:
55 writeText "hv-${bin}.service" ''
56 [Unit]
57 Description=Hyper-V ${title} daemon
58 ConditionVirtualization=microsoft
59 ${lib.optionalString (check != "") ''
60 ConditionPathExists=/dev/vmbus/${check}
61 ''}
62 [Service]
63 ExecStart=@out@/hv_${bin}_daemon -n
64 Restart=on-failure
65 PrivateTmp=true
66 Slice=hyperv.slice
67
68 [Install]
69 WantedBy=hyperv-daemons.target
70 '';
71
72in
73stdenv.mkDerivation {
74 pname = "hyperv-daemons";
75 inherit (kernel) version;
76
77 # we just stick the bins into out as well as it requires "out"
78 outputs = [
79 "bin"
80 "lib"
81 "out"
82 ];
83
84 buildInputs = [ daemons ];
85 passthru = {
86 inherit daemons;
87 };
88
89 buildCommand = ''
90 system=$lib/lib/systemd/system
91
92 ${lib.optionalString (fcopy_name != null) ''
93 install -Dm444 ${
94 service fcopy_name "file copy (FCOPY)"
95 "/sys/bus/vmbus/devices/eb765408-105f-49b6-b4aa-c123b64d17d4/uio"
96 } $system/hv-fcopy.service
97 ''}
98 install -Dm444 ${service "kvp" "key-value pair (KVP)" "hv_kvp"} $system/hv-kvp.service
99 install -Dm444 ${service "vss" "volume shadow copy (VSS)" "hv_vss"} $system/hv-vss.service
100
101 cat > $system/hyperv-daemons.target <<EOF
102 [Unit]
103 Description=Hyper-V Daemons
104 Wants=hv-kvp.service hv-vss.service
105 ${lib.optionalString (fcopy_name != null) ''
106 Wants=hv-fcopy.service
107 ''}
108 EOF
109
110 for f in $lib/lib/systemd/system/*.service ; do
111 substituteInPlace $f --replace @out@ ${daemons}/bin
112 done
113
114 # we need to do both $out and $bin as $out is required
115 for d in $out/bin $bin/bin ; do
116 # make user binaries available
117 mkdir -p $d
118 ln -s ${daemons}/bin/lsvmbus $d/lsvmbus
119 done
120 '';
121
122 meta = with lib; {
123 description = "Integration Services for running NixOS under HyperV";
124 mainProgram = "lsvmbus";
125 longDescription = ''
126 This packages contains the daemons that are used by the Hyper-V hypervisor
127 on the host.
128
129 Microsoft calls their guest agents "Integration Services" which is why
130 we use that name here.
131 '';
132 homepage = "https://kernel.org";
133 maintainers = with maintainers; [ peterhoeg ];
134 platforms = kernel.meta.platforms;
135 };
136}