]> git.proxmox.com Git - mirror_qemu.git/commitdiff
migration/savevm: Prepare vmdesc json writer in qemu_savevm_state_setup()
authorDavid Hildenbrand <david@redhat.com>
Tue, 17 Jan 2023 11:22:43 +0000 (12:22 +0100)
committerJuan Quintela <quintela@redhat.com>
Mon, 6 Feb 2023 18:22:56 +0000 (19:22 +0100)
... and store it in the migration state. This is a preparation for
storing selected vmds's already in qemu_savevm_state_setup().

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
migration/migration.c
migration/migration.h
migration/savevm.c

index 6d4cd8083bd40ce3d5ff895eb663d5b89a43dc2d..c3ad4cd670efb77c4be4c08b6f7332912dd2afcc 100644 (file)
@@ -1933,6 +1933,8 @@ static void migrate_fd_cleanup(MigrationState *s)
 
     g_free(s->hostname);
     s->hostname = NULL;
+    json_writer_free(s->vmdesc);
+    s->vmdesc = NULL;
 
     qemu_savevm_state_cleanup();
 
index ae4ffd34546c674479d5d599f55901962f584329..66511ce532751acfba9f19919892007c3cd0ea4d 100644 (file)
@@ -17,6 +17,7 @@
 #include "exec/cpu-common.h"
 #include "hw/qdev-core.h"
 #include "qapi/qapi-types-migration.h"
+#include "qapi/qmp/json-writer.h"
 #include "qemu/thread.h"
 #include "qemu/coroutine_int.h"
 #include "io/channel.h"
@@ -366,6 +367,9 @@ struct MigrationState {
      * This save hostname when out-going migration starts
      */
     char *hostname;
+
+    /* QEMU_VM_VMDESCRIPTION content filled for all non-iterable devices. */
+    JSONWriter *vmdesc;
 };
 
 void migrate_set_state(int *state, int old_state, int new_state);
index 3e3631652e4df79915e9aeecf44f65d84e51f1a3..28f88b5521bbf61381f6cd24874f2f6df8a1c222 100644 (file)
@@ -42,7 +42,6 @@
 #include "postcopy-ram.h"
 #include "qapi/error.h"
 #include "qapi/qapi-commands-migration.h"
-#include "qapi/qmp/json-writer.h"
 #include "qapi/clone-visitor.h"
 #include "qapi/qapi-builtin-visit.h"
 #include "qapi/qmp/qerror.h"
@@ -1190,10 +1189,16 @@ bool qemu_savevm_state_guest_unplug_pending(void)
 
 void qemu_savevm_state_setup(QEMUFile *f)
 {
+    MigrationState *ms = migrate_get_current();
     SaveStateEntry *se;
     Error *local_err = NULL;
     int ret;
 
+    ms->vmdesc = json_writer_new(false);
+    json_writer_start_object(ms->vmdesc, NULL);
+    json_writer_int64(ms->vmdesc, "page_size", qemu_target_page_size());
+    json_writer_start_array(ms->vmdesc, "devices");
+
     trace_savevm_state_setup();
     QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
         if (!se->ops || !se->ops->save_setup) {
@@ -1391,15 +1396,12 @@ int qemu_savevm_state_complete_precopy_non_iterable(QEMUFile *f,
                                                     bool in_postcopy,
                                                     bool inactivate_disks)
 {
-    g_autoptr(JSONWriter) vmdesc = NULL;
+    MigrationState *ms = migrate_get_current();
+    JSONWriter *vmdesc = ms->vmdesc;
     int vmdesc_len;
     SaveStateEntry *se;
     int ret;
 
-    vmdesc = json_writer_new(false);
-    json_writer_start_object(vmdesc, NULL);
-    json_writer_int64(vmdesc, "page_size", qemu_target_page_size());
-    json_writer_start_array(vmdesc, "devices");
     QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
         ret = vmstate_save(f, se, vmdesc);
         if (ret) {
@@ -1434,6 +1436,10 @@ int qemu_savevm_state_complete_precopy_non_iterable(QEMUFile *f,
         qemu_put_buffer(f, (uint8_t *)json_writer_get(vmdesc), vmdesc_len);
     }
 
+    /* Free it now to detect any inconsistencies. */
+    json_writer_free(vmdesc);
+    ms->vmdesc = NULL;
+
     return 0;
 }