[Qemu-devel] [PULL 04/15] migration: Make failed migration load set file error

[Juan Quintela <quintela@redhat.com>]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

If an error occurs in a section load, set the file error flag
so that the transport can get notified to do a cleanup.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Michael R. Hines <michael@hinespot.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
---
 migration/savevm.c | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/migration/savevm.c b/migration/savevm.c
index 33a2911..a831ec2 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -1828,40 +1828,45 @@ qemu_loadvm_section_part_end(QEMUFile *f, MigrationIncomingState *mis)
 static int qemu_loadvm_state_main(QEMUFile *f, MigrationIncomingState *mis)
 {
     uint8_t section_type;
-    int ret;
+    int ret = 0;

     while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
-
+        ret = 0;
         trace_qemu_loadvm_state_section(section_type);
         switch (section_type) {
         case QEMU_VM_SECTION_START:
         case QEMU_VM_SECTION_FULL:
             ret = qemu_loadvm_section_start_full(f, mis);
             if (ret < 0) {
-                return ret;
+                goto out;
             }
             break;
         case QEMU_VM_SECTION_PART:
         case QEMU_VM_SECTION_END:
             ret = qemu_loadvm_section_part_end(f, mis);
             if (ret < 0) {
-                return ret;
+                goto out;
             }
             break;
         case QEMU_VM_COMMAND:
             ret = loadvm_process_command(f);
             trace_qemu_loadvm_state_section_command(ret);
             if ((ret < 0) || (ret & LOADVM_QUIT)) {
-                return ret;
+                goto out;
             }
             break;
         default:
             error_report("Unknown savevm section type %d", section_type);
-            return -EINVAL;
+            ret = -EINVAL;
+            goto out;
         }
     }

-    return 0;
+out:
+    if (ret < 0) {
+        qemu_file_set_error(f, ret);
+    }
+    return ret;
 }

 int qemu_loadvm_state(QEMUFile *f)
-- 
2.7.4