[libvirt] [PATCH] util: disallow resetting a pci-bridge device
It is distructive to attempt a reset on pci-bridge, the host can crash.
The bridges won't contain any guest data and neither they can be
passed through using vfio/stub. So, no point in allowing a reset for them.
Signed-off-by: Shivaprasad G Bhat <sbhat(a)linux.vnet.ibm.com>
---
src/util/virpci.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/src/util/virpci.c b/src/util/virpci.c
index 0601f49..860f7aa 100644
--- a/src/util/virpci.c
+++ b/src/util/virpci.c
@@ -933,6 +933,16 @@ virPCIDeviceReset(virPCIDevicePtr dev,
char *drvName = NULL;
int ret = -1;
int fd = -1;
+ int hdrType = -1;
+
+ if (virPCIGetHeaderType(dev, &hdrType) < 0)
+ return -1;
+
+ if (hdrType == VIR_PCI_HEADER_PCI_BRIDGE) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("Resetting a pci-bridge device is not allowed"));
+ return -1;
+ }
if (activeDevs && virPCIDeviceListFind(activeDevs, dev)) {
virReportError(VIR_ERR_INTERNAL_ERROR,