[PATCH 28/33] migration: push Error **errp into qemu_savevm_send_packaged()

["Daniel P. Berrangé" <berrange@redhat.com>]

This is an incremental step in converting vmstate loading code to report
via Error objects instead of printing directly to the console/monitor.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 migration/migration.c | 4 +++-
 migration/savevm.c    | 9 +++++----
 migration/savevm.h    | 3 ++-
 3 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/migration/migration.c b/migration/migration.c
index 2ccb1b66b5..984276d066 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -2927,7 +2927,9 @@ static int postcopy_start(MigrationState *ms)
     restart_block = false;
 
     /* Now send that blob */
-    if (qemu_savevm_send_packaged(ms->to_dst_file, bioc->data, bioc->usage)) {
+    if (qemu_savevm_send_packaged(ms->to_dst_file, bioc->data, bioc->usage,
+                                  &local_err)) {
+        error_report_err(local_err);
         goto fail_closefb;
     }
     qemu_fclose(fb);
diff --git a/migration/savevm.c b/migration/savevm.c
index d6c36e6b6b..deea8854db 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -1002,15 +1002,16 @@ void qemu_savevm_send_open_return_path(QEMUFile *f)
  *
  * Returns:
  *    0 on success
- *    -ve on error
+ *    -1 on error
  */
-int qemu_savevm_send_packaged(QEMUFile *f, const uint8_t *buf, size_t len)
+int qemu_savevm_send_packaged(QEMUFile *f, const uint8_t *buf, size_t len,
+                              Error **errp)
 {
     uint32_t tmp;
 
     if (len > MAX_VM_CMD_PACKAGED_SIZE) {
-        error_report("%s: Unreasonably large packaged state: %zu",
-                     __func__, len);
+        error_setg(errp, "unreasonably large packaged state: %zu > %d",
+                   len, MAX_VM_CMD_PACKAGED_SIZE);
         return -1;
     }
 
diff --git a/migration/savevm.h b/migration/savevm.h
index e3120a4fb0..2d46e848cd 100644
--- a/migration/savevm.h
+++ b/migration/savevm.h
@@ -46,7 +46,8 @@ void qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size,
                                uint64_t *res_postcopy_only);
 void qemu_savevm_send_ping(QEMUFile *f, uint32_t value);
 void qemu_savevm_send_open_return_path(QEMUFile *f);
-int qemu_savevm_send_packaged(QEMUFile *f, const uint8_t *buf, size_t len);
+int qemu_savevm_send_packaged(QEMUFile *f, const uint8_t *buf, size_t len,
+                              Error **errp);
 void qemu_savevm_send_postcopy_advise(QEMUFile *f);
 void qemu_savevm_send_postcopy_listen(QEMUFile *f);
 void qemu_savevm_send_postcopy_run(QEMUFile *f);
-- 
2.29.2