qemu: add qemuSecurityStartVhostUserGPU helper

See function documentation. Used in a following patch.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>

src/qemu/qemu_security.c

@@ -433,6 +433,46 @@ qemuSecurityRestoreChardevLabel(virQEMUDriverPtr driver,
 }
 
 
+/*
+ * qemuSecurityStartVhostUserGPU:
+ *
+ * @driver: the QEMU driver
+ * @vm: the domain object
+ * @cmd: the command to run
+ * @existstatus: pointer to int returning exit status of process
+ * @cmdret: pointer to int returning result of virCommandRun
+ *
+ * Start the vhost-user-gpu process with approriate labels.
+ * This function returns -1 on security setup error, 0 if all the
+ * setup was done properly. In case the virCommand failed to run
+ * 0 is returned but cmdret is set appropriately with the process
+ * exitstatus also set.
+ */
+int
+qemuSecurityStartVhostUserGPU(virQEMUDriverPtr driver,
+                              virDomainObjPtr vm,
+                              virCommandPtr cmd,
+                              int *exitstatus,
+                              int *cmdret)
+{
+    if (virSecurityManagerSetChildProcessLabel(driver->securityManager,
+                                               vm->def, cmd) < 0)
+        return -1;
+
+    if (virSecurityManagerPreFork(driver->securityManager) < 0)
+        return -1;
+
+    *cmdret = virCommandRun(cmd, exitstatus);
+
+    virSecurityManagerPostFork(driver->securityManager);
+
+    if (*cmdret < 0)
+        return -1;
+
+    return 0;
+}
+
+
 /*
  * qemuSecurityStartTPMEmulator:
  *

src/qemu/qemu_security.h

@@ -77,6 +77,12 @@ int qemuSecurityRestoreChardevLabel(virQEMUDriverPtr driver,
                                     virDomainObjPtr vm,
                                     virDomainChrDefPtr chr);
 
+int qemuSecurityStartVhostUserGPU(virQEMUDriverPtr driver,
+                                  virDomainObjPtr vm,
+                                  virCommandPtr cmd,
+                                  int *exitstatus,
+                                  int *cmdret);
+
 int qemuSecurityStartTPMEmulator(virQEMUDriverPtr driver,
                                  virDomainObjPtr vm,
                                  virCommandPtr cmd,