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virt-aa-helper: generate rules for passthrough input devices

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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@canonical.com>
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
This commit is contained in:
Christian Ehrhardt 2018-03-20 11:11:13 +01:00
parent 943c1fd9b6
commit 26bb6d76ec
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GPG Key ID: BA3E29338280B242
2 changed files with 11 additions and 0 deletions
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8
src/security/virt-aa-helper.c
View File

@ -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 &&

3
tests/virt-aa-helper-test
View File

@ -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