[libvirt] [PATCH 1/7] qemu: Store inactive domain configuration in snapshot

[Kothapally Madhu Pavan]

Inorder to capture the exact state of domain, inactive configuration
is needed along with active configuration. This patch stores inactive
domain configuration when creating snapshot of a running domain. It
also captures the inactive snapshot configuration when a snapshot is
redefined.

Signed-off-by: Kothapally Madhu Pavan <kmp at linux.vnet.ibm.com>
---
 src/conf/snapshot_conf.c | 13 +++++++++++++
 src/conf/snapshot_conf.h |  1 +
 src/qemu/qemu_driver.c   | 10 ++++++++++
 3 files changed, 24 insertions(+)

diff --git a/src/conf/snapshot_conf.c b/src/conf/snapshot_conf.c
index f0e852c..bfe3d6c 100644
--- a/src/conf/snapshot_conf.c
+++ b/src/conf/snapshot_conf.c
@@ -102,6 +102,7 @@ void virDomainSnapshotDefFree(virDomainSnapshotDefPtr def)
         virDomainSnapshotDiskDefClear(&def->disks[i]);
     VIR_FREE(def->disks);
     virDomainDefFree(def->dom);
+    virDomainDefFree(def->newDom);
     virObjectUnref(def->cookie);
     VIR_FREE(def);
 }
@@ -1336,6 +1337,18 @@ virDomainSnapshotRedefinePrep(virDomainPtr domain,
             }
         }
 
+        if (other->def->newDom) {
+            if (def->newDom) {
+                if (!virDomainDefCheckABIStability(other->def->newDom,
+                                                   def->newDom, xmlopt))
+                    goto cleanup;
+            } else {
+                /* Transfer the inactive domain def */
+                def->newDom = other->def->newDom;
+                other->def->newDom = NULL;
+            }
+        }
+
         if (other == vm->current_snapshot) {
             *update_current = true;
             vm->current_snapshot = NULL;
diff --git a/src/conf/snapshot_conf.h b/src/conf/snapshot_conf.h
index 1d663c7..0bc915f 100644
--- a/src/conf/snapshot_conf.h
+++ b/src/conf/snapshot_conf.h
@@ -75,6 +75,7 @@ struct _virDomainSnapshotDef {
     virDomainSnapshotDiskDef *disks;
 
     virDomainDefPtr dom;
+    virDomainDefPtr newDom;
 
     virObjectPtr cookie;
 
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 74fdfdb..4ffec70 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -15035,6 +15035,16 @@ qemuDomainSnapshotCreateXML(virDomainPtr domain,
                                                  VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE)))
             goto endjob;
 
+        if (vm->newDef) {
+            if (!(xml = qemuDomainDefFormatLive(driver, vm->newDef, priv->origCPU,
+                                                true, true)) ||
+                !(def->newDom = virDomainDefParseString(xml, caps, driver->xmlopt, NULL,
+                                                        VIR_DOMAIN_DEF_PARSE_INACTIVE |
+                                                        VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE)))
+                goto endjob;
+        }
+
+
         if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY) {
             align_location = VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL;
             align_match = false;
-- 
1.8.3.1