[PATCH 6/7] lxcDomainDetachDeviceFlags: Parse XML twice rather than use virDomainDeviceDefCopy

[Peter Krempa <pkrempa@xxxxxxxxxx>]

'virDomainDeviceDefCopy' formats the definition and parses it back.
Since we already are parsing the XML here, we're better off parsing it
twice and save the formatting step.

Signed-off-by: Peter Krempa <pkrempa@xxxxxxxxxx>
---
 src/lxc/lxc_driver.c | 36 ++++++++++++++----------------------
 1 file changed, 14 insertions(+), 22 deletions(-)

diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index 2801ed3d6d..5a16e7375e 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -4416,8 +4416,10 @@ static int lxcDomainDetachDeviceFlags(virDomainPtr dom,
     g_autoptr(virCaps) caps = NULL;
     virDomainObj *vm = NULL;
     g_autoptr(virDomainDef) vmdef = NULL;
-    virDomainDeviceDef *dev = NULL;
-    virDomainDeviceDef *dev_copy = NULL;
+    g_autoptr(virDomainDeviceDef) dev_config = NULL;
+    g_autoptr(virDomainDeviceDef) dev_live = NULL;
+    unsigned int parse_flags = VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE |
+                               VIR_DOMAIN_DEF_PARSE_INACTIVE;
     int ret = -1;
     g_autoptr(virLXCDriverConfig) cfg = virLXCDriverGetConfig(driver);

@@ -4439,22 +4441,15 @@ static int lxcDomainDetachDeviceFlags(virDomainPtr dom,
     if (!(caps = virLXCDriverGetCapabilities(driver, false)))
         goto endjob;

-    dev = dev_copy = virDomainDeviceDefParse(xml, vm->def,
-                                             driver->xmlopt, NULL,
-                                             VIR_DOMAIN_DEF_PARSE_INACTIVE |
-                                             VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE);
-    if (dev == NULL)
-        goto endjob;
+    if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
+        if (!(dev_config = virDomainDeviceDefParse(xml, vm->def, driver->xmlopt,
+                                                   NULL, parse_flags)))
+            goto endjob;
+    }

-    if (flags & VIR_DOMAIN_AFFECT_CONFIG &&
-        flags & VIR_DOMAIN_AFFECT_LIVE) {
-        /* If we are affecting both CONFIG and LIVE
-         * create a deep copy of device as adding
-         * to CONFIG takes one instance.
-         */
-        dev_copy = virDomainDeviceDefCopy(dev, vm->def,
-                                          driver->xmlopt, NULL);
-        if (!dev_copy)
+    if (flags & VIR_DOMAIN_AFFECT_LIVE) {
+        if (!(dev_live = virDomainDeviceDefParse(xml, vm->def, driver->xmlopt,
+                                                 NULL, parse_flags)))
             goto endjob;
     }

@@ -4464,12 +4459,12 @@ static int lxcDomainDetachDeviceFlags(virDomainPtr dom,
         if (!vmdef)
             goto endjob;

-        if ((ret = lxcDomainDetachDeviceConfig(vmdef, dev_copy)) < 0)
+        if ((ret = lxcDomainDetachDeviceConfig(vmdef, dev_config)) < 0)
             goto endjob;
     }

     if (flags & VIR_DOMAIN_AFFECT_LIVE) {
-        if ((ret = lxcDomainDetachDeviceLive(driver, vm, dev)) < 0)
+        if ((ret = lxcDomainDetachDeviceLive(driver, vm, dev_live)) < 0)
             goto endjob;
         /*
          * update domain status forcibly because the domain status may be
@@ -4493,9 +4488,6 @@ static int lxcDomainDetachDeviceFlags(virDomainPtr dom,
     virDomainObjEndJob(vm);

  cleanup:
-    if (dev != dev_copy)
-        virDomainDeviceDefFree(dev_copy);
-    virDomainDeviceDefFree(dev);
     virDomainObjEndAPI(&vm);
     return ret;
 }
-- 
2.37.3