[libvirt] [PATCH v4 3/5] virt-aa-helper: generate rules for passthrough input devices
Input devices can passthrough an event device. This currently works only via
hotplug where the AppArmor label is created via the domain label callbacks.
This adds the virt-aa-helper support for passthrough input devices to generate
rules for the needed paths from the initial guest definition as well.
Example in domain xml:
<input type='passthrough' bus='virtio'>
<source evdev='/dev/input/event0' />
</input>
Works to start now and creates:
"/dev/input/event0" rw,
Fixes: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1757085
Acked-by: Jamie Strandboge <jamie(a)canonical.com>
Signed-off-by: Christian Ehrhardt <christian.ehrhardt(a)canonical.com>
---
src/security/virt-aa-helper.c | 8 ++++++++
tests/virt-aa-helper-test | 3 +++
2 files changed, 11 insertions(+)
diff --git a/src/security/virt-aa-helper.c b/src/security/virt-aa-helper.c
index 456cfce..ad1371d 100644
--- a/src/security/virt-aa-helper.c
+++ b/src/security/virt-aa-helper.c
@@ -1157,6 +1157,14 @@ get_files(vahControl * ctl)
}
}
+ for (i = 0; i < ctl->def->ninputs; i++) {
+ if (ctl->def->inputs[i] &&
+ ctl->def->inputs[i]->type == VIR_DOMAIN_INPUT_TYPE_PASSTHROUGH)
{
+ if (vah_add_file(&buf, ctl->def->inputs[i]->source.evdev,
"rw") != 0)
+ goto cleanup;
+ }
+ }
+
for (i = 0; i < ctl->def->nnets; i++) {
if (ctl->def->nets[i] &&
ctl->def->nets[i]->type == VIR_DOMAIN_NET_TYPE_VHOSTUSER
&&
diff --git a/tests/virt-aa-helper-test b/tests/virt-aa-helper-test
index 1e96b8e..054269c 100755
--- a/tests/virt-aa-helper-test
+++ b/tests/virt-aa-helper-test
@@ -359,6 +359,9 @@ testme "0" "hugepages" "-r -u $valid_uuid -F
/run/hugepages/kvm/\*\*" "$test_xml
sed -e "s,###UUID###,$uuid,g" -e "s,###DISK###,$disk1,g" -e
"s,<graphics.*>,<graphics type='vnc'
socket='/var/lib/libvirt/qemu/myself.vnc'><listen type='address'
address='0.0.0.0'/></graphics>,g" "$template_xml" >
"$test_xml"
testme "0" "vnc socket" "-r -u $valid_uuid"
"$test_xml"
+sed -e "s,###UUID###,$uuid,g" -e "s,###DISK###,$disk1,g" -e
"s,</devices>,<input type='passthrough'
bus='virtio'><source evdev='$disk2'
/></input></devices>,g" "$template_xml" >
"$test_xml"
+testme "0" "input dev passthrough" "-r -u $valid_uuid"
"$test_xml"
+
testme "0" "help" "-h"
echo "" >$output
--
2.7.4