From e0f898d623a61d591a99cd2fa99f77d02f49fd7a Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Fri, 15 Apr 2022 00:05:11 +0200
Subject: vm/guest: add support for virtiofs

---
 roles/vm/guest/base/tasks/Debian.yml                  | 12 ++++++++++++
 roles/vm/guest/create/templates/libvirt-domain.xml.j2 | 16 ++++++++++++++++
 2 files changed, 28 insertions(+)

(limited to 'roles/vm/guest')

diff --git a/roles/vm/guest/base/tasks/Debian.yml b/roles/vm/guest/base/tasks/Debian.yml
index 74778d8e..1dfc4168 100644
--- a/roles/vm/guest/base/tasks/Debian.yml
+++ b/roles/vm/guest/base/tasks/Debian.yml
@@ -59,3 +59,15 @@
     regexp: "^{{ item.key }}="
     line: "{{ item.key }}={{ item.value }}"
   notify: update grub
+
+
+- name: mount virtiofs shares from host
+  loop: "{{ install.vm.virtiofs | default({}) | dict2items }}"
+  loop_control:
+    label: "{{ item.key }} -> {{ item.value.dest }}"
+  mount:
+    src: "{{ item.key }}"
+    path: "{{ item.value.dest }}"
+    fstype: "virtiofs"
+    opts: "{{ item.value.mnt_opts | default(omit) }}"
+    state: mounted
diff --git a/roles/vm/guest/create/templates/libvirt-domain.xml.j2 b/roles/vm/guest/create/templates/libvirt-domain.xml.j2
index 96b12a74..a7d584dc 100644
--- a/roles/vm/guest/create/templates/libvirt-domain.xml.j2
+++ b/roles/vm/guest/create/templates/libvirt-domain.xml.j2
@@ -2,6 +2,12 @@
   <name>{{ inventory_hostname }}</name>
   <memory>{{ ((install.vm.memory | human_to_bytes) / 1024) | int }}</memory>
   <currentMemory>{{ ((install.vm.memory | human_to_bytes) / 1024) | int }}</currentMemory>
+{% if 'virtiofs' in install.vm %}
+  <memoryBacking>
+    <source type='memfd'/>
+    <access mode='shared'/>
+  </memoryBacking>
+{% endif %}
   <vcpu>{{ install.vm.numcpus }}</vcpu>
   <os>
     <type arch='x86_64' machine='q35'>hvm</type>
@@ -72,6 +78,16 @@
 {%     endfor %}
 {%   endfor %}
 
+{% endif %}
+{% if 'virtiofs' in install.vm %}
+{%   for tag,fs in install.vm.virtiofs.items() %}
+    <filesystem type='mount' accessmode='passthrough'>
+      <driver type='virtiofs'/>
+      <source dir='{{ fs.src }}'/>
+      <target dir='{{ tag }}'/>
+    </filesystem>
+{%   endfor %}
+
 {% endif %}
 {% if install.interfaces %}
 {%   for if in install.interfaces %}
-- 
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