[PATCH 1/2] backup: Store 'apiFlags' in private section of virDomainBackupDef

[Peter Krempa]

'qemuBackupJobTerminate' needs the API flags to see whether
VIR_DOMAIN_BACKUP_BEGIN_REUSE_EXTERNAL. Unfortunately when called via
qemuProcessReconnect()->qemuProcessStop() early (e.g. if the qemu
process died while we were reconnecting) the job is cleared temporarily
so that other APIs can be called. This would mean that we couldn't clean
up the files in some cases.

Save the 'apiFlags' inside the backup object and set it from the
'qemuDomainJobObj' 'apiFlags' member when reconnecting to a VM.

Signed-off-by: Peter Krempa <pkrempa at redhat.com>
---
 src/conf/backup_conf.h  | 2 ++
 src/qemu/qemu_backup.c  | 4 +++-
 src/qemu/qemu_process.c | 9 ++++++---
 3 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/conf/backup_conf.h b/src/conf/backup_conf.h
index bda2bdcfe4..2902f39fb7 100644
--- a/src/conf/backup_conf.h
+++ b/src/conf/backup_conf.h
@@ -99,6 +99,8 @@ struct _virDomainBackupDef {
     unsigned long long pull_tmp_total;

     char *errmsg; /* error message of failed sub-blockjob */
+
+    unsigned int apiFlags; /* original flags used when starting the job */
 };

 typedef enum {
diff --git a/src/qemu/qemu_backup.c b/src/qemu/qemu_backup.c
index 6ce29c28e1..f6096f643f 100644
--- a/src/qemu/qemu_backup.c
+++ b/src/qemu/qemu_backup.c
@@ -560,7 +560,7 @@ qemuBackupJobTerminate(virDomainObjPtr vm,
     qemuDomainObjPrivatePtr priv = vm->privateData;
     size_t i;

-    if (!(priv->job.apiFlags & VIR_DOMAIN_BACKUP_BEGIN_REUSE_EXTERNAL) &&
+    if (!(priv->backup->apiFlags & VIR_DOMAIN_BACKUP_BEGIN_REUSE_EXTERNAL) &&
         (priv->backup->type == VIR_DOMAIN_BACKUP_TYPE_PULL ||
          (priv->backup->type == VIR_DOMAIN_BACKUP_TYPE_PUSH &&
           jobstatus != QEMU_DOMAIN_JOB_STATUS_COMPLETED))) {
@@ -766,6 +766,8 @@ qemuBackupBegin(virDomainObjPtr vm,
     if (def->type == VIR_DOMAIN_BACKUP_TYPE_PULL)
         pull = true;

+    def->apiFlags = flags;
+
     /* we'll treat this kind of backup job as an asyncjob as it uses some of the
      * infrastructure for async jobs. We'll allow standard modify-type jobs
      * as the interlocking of conflicting operations is handled on the block
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 89ede27751..971a270793 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -96,6 +96,7 @@
 #include "virthreadjob.h"
 #include "virutil.h"
 #include "storage_source.h"
+#include "backup_conf.h"

 #define VIR_FROM_THIS VIR_FROM_QEMU

@@ -8315,12 +8316,14 @@ qemuProcessReconnect(void *opaque)
     g_clear_object(&data->identity);
     VIR_FREE(data);

+    cfg = virQEMUDriverGetConfig(driver);
+    priv = obj->privateData;
+
     qemuDomainObjRestoreJob(obj, &oldjob);
     if (oldjob.asyncJob == QEMU_ASYNC_JOB_MIGRATION_IN)
         stopFlags |= VIR_QEMU_PROCESS_STOP_MIGRATED;
-
-    cfg = virQEMUDriverGetConfig(driver);
-    priv = obj->privateData;
+    if (oldjob.asyncJob == QEMU_ASYNC_JOB_BACKUP && priv->backup)
+        priv->backup->apiFlags = oldjob.apiFlags;

     /* expect that libvirt might have crashed during VM start, so prevent
      * cleanup of transient disks */
-- 
2.29.2