On 9/11/24 16:24, Laine Stump wrote:
On 9/11/24 5:02 PM, Jim Fehlig via Devel wrote:
The Xen libxl driver does not support nwfilter. Add a check for nwfilters
to the devicesPostParseCallback, returning VIR_ERR_CONFIG_UNSUPPORTED if
any are found.
It's generally preferred for drivers to ignore unsupported XML features,
I would instead characterize it as "drivers generally ignore *unrecognized*
XML", but it's quite common for a bit of XML that's understood and supported in
one context within libvirt to generate an UNSUPPORTED error when attempting to
use it in a place where it isn't supported.
but ignoring a user's request to filter VM network traffic can be viewed
as a security issue.
Definitely.
Signed-off-by: Jim Fehlig <jfehlig@xxxxxxxx>
---
src/libxl/libxl_domain.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/src/libxl/libxl_domain.c b/src/libxl/libxl_domain.c
index 0f129ec69c..2f6cebb8ae 100644
--- a/src/libxl/libxl_domain.c
+++ b/src/libxl/libxl_domain.c
@@ -131,6 +131,13 @@ libxlDomainDeviceDefPostParse(virDomainDeviceDef *dev,
void *opaque G_GNUC_UNUSED,
void *parseOpaque G_GNUC_UNUSED)
{
+ if (dev->type == VIR_DOMAIN_DEVICE_NET && dev->data.net->filter) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("filterref is not supported in %1$s"),
+ virDomainVirtTypeToString(def->virtType));
+ return -1;
+ }
+
This more properly should be in a function called
libxlValidateDomainDeviceDef(), which would look something like
qemuValidateDomainDeviceDef() and be added into libxlDomainDefParserConfig with
this initialization:
.deviceValidateCallback = libxlValidateDomainDeviceDef,
Yes, good point! The libxl driver already has domainValidateCallback, but now
needs a deviceValidateCallback for this code. I'll make that change in V2.
Before sending another version, I'd like to hear opinions on Demi's question
about the other hypervisor drivers. Do they need a similar change?
Regards,
Jim
