security: update hostdev labelling functions for VFIO

Legacy kvm style pci device assignment requires changes to the
labelling of several sysfs files for each device, but for vfio device
assignment, the only thing that needs to be relabelled/chowned is the
"group" device for the group that contains the device to be assigned.

src/security/security_apparmor.c

@@ -831,7 +831,17 @@ AppArmorSetSecurityHostdevLabel(virSecurityManagerPtr mgr,
         if (!pci)
             goto done;
 
-        ret = virPCIDeviceFileIterate(pci, AppArmorSetSecurityPCILabel, ptr);
+        if (dev->source.subsys.u.pci.backend
+            == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_TYPE_VFIO) {
+            char *vfioGroupDev = virPCIDeviceGetVFIOGroupDev(pci);
+
+            if (!vfioGroupDev)
+                goto done;
+            ret = AppArmorSetSecurityPCILabel(pci, vfioGroupDev, ptr);
+            VIR_FREE(vfioGroupDev);
+        } else {
+            ret = virPCIDeviceFileIterate(pci, AppArmorSetSecurityPCILabel, ptr);
+        }
         virPCIDeviceFree(pci);
         break;
     }

src/security/security_dac.c

@@ -516,8 +516,19 @@ virSecurityDACSetSecurityHostdevLabel(virSecurityManagerPtr mgr,
         if (!pci)
             goto done;
 
-        ret = virPCIDeviceFileIterate(pci, virSecurityDACSetSecurityPCILabel,
-                                      params);
+        if (dev->source.subsys.u.pci.backend
+            == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_TYPE_VFIO) {
+            char *vfioGroupDev = virPCIDeviceGetVFIOGroupDev(pci);
+
+            if (!vfioGroupDev)
+                goto done;
+            ret = virSecurityDACSetSecurityPCILabel(pci, vfioGroupDev, params);
+            VIR_FREE(vfioGroupDev);
+        } else {
+            ret = virPCIDeviceFileIterate(pci, virSecurityDACSetSecurityPCILabel,
+                                          params);
+        }
+
         virPCIDeviceFree(pci);
 
         break;
@@ -596,7 +607,17 @@ virSecurityDACRestoreSecurityHostdevLabel(virSecurityManagerPtr mgr,
         if (!pci)
             goto done;
 
-        ret = virPCIDeviceFileIterate(pci, virSecurityDACRestoreSecurityPCILabel, mgr);
+        if (dev->source.subsys.u.pci.backend
+            == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_TYPE_VFIO) {
+            char *vfioGroupDev = virPCIDeviceGetVFIOGroupDev(pci);
+
+            if (!vfioGroupDev)
+                goto done;
+            ret = virSecurityDACRestoreSecurityPCILabel(pci, vfioGroupDev, mgr);
+            VIR_FREE(vfioGroupDev);
+        } else {
+            ret = virPCIDeviceFileIterate(pci, virSecurityDACRestoreSecurityPCILabel, mgr);
+        }
         virPCIDeviceFree(pci);
 
         break;

src/security/security_selinux.c

@@ -1342,7 +1342,17 @@ virSecuritySELinuxSetSecurityHostdevSubsysLabel(virDomainDefPtr def,
         if (!pci)
             goto done;
 
-        ret = virPCIDeviceFileIterate(pci, virSecuritySELinuxSetSecurityPCILabel, def);
+        if (dev->source.subsys.u.pci.backend
+            == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_TYPE_VFIO) {
+            char *vfioGroupDev = virPCIDeviceGetVFIOGroupDev(pci);
+
+            if (!vfioGroupDev)
+                goto done;
+            ret = virSecuritySELinuxSetSecurityPCILabel(pci, vfioGroupDev, def);
+            VIR_FREE(vfioGroupDev);
+        } else {
+            ret = virPCIDeviceFileIterate(pci, virSecuritySELinuxSetSecurityPCILabel, def);
+        }
         virPCIDeviceFree(pci);
 
         break;
@@ -1504,7 +1514,17 @@ virSecuritySELinuxRestoreSecurityHostdevSubsysLabel(virSecurityManagerPtr mgr,
         if (!pci)
             goto done;
 
-        ret = virPCIDeviceFileIterate(pci, virSecuritySELinuxRestoreSecurityPCILabel, mgr);
+        if (dev->source.subsys.u.pci.backend
+            == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_TYPE_VFIO) {
+            char *vfioGroupDev = virPCIDeviceGetVFIOGroupDev(pci);
+
+            if (!vfioGroupDev)
+                goto done;
+            ret = virSecuritySELinuxRestoreSecurityPCILabel(pci, vfioGroupDev, mgr);
+            VIR_FREE(vfioGroupDev);
+        } else {
+            ret = virPCIDeviceFileIterate(pci, virSecuritySELinuxRestoreSecurityPCILabel, mgr);
+        }
         virPCIDeviceFree(pci);
 
         break;