void hmp_savevm(Monitor *mon, const QDict *qdict) { BlockDriverState *bs, *bs1; QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; int ret; QEMUFile *f; int saved_vm_running; uint64_t vm_state_size; qemu_timeval tv; struct tm tm; const char *name = qdict_get_try_str(qdict, "name"); Error *local_err = NULL; AioContext *aio_context; if (!bdrv_all_can_snapshot(&bs)) { monitor_printf(mon, "Device '%s' is writable but does not " "support snapshots.\n", bdrv_get_device_name(bs)); return; } /* Delete old snapshots of the same name */ if (name && bdrv_all_delete_snapshot(name, &bs1, &local_err) < 0) { error_reportf_err(local_err, "Error while deleting snapshot on device '%s': ", bdrv_get_device_name(bs1)); return; } bs = bdrv_all_find_vmstate_bs(); if (bs == NULL) { monitor_printf(mon, "No block device can accept snapshots\n"); return; } aio_context = bdrv_get_aio_context(bs); saved_vm_running = runstate_is_running(); ret = global_state_store(); if (ret) { monitor_printf(mon, "Error saving global state\n"); return; } vm_stop(RUN_STATE_SAVE_VM); aio_context_acquire(aio_context); memset(sn, 0, sizeof(*sn)); /* fill auxiliary fields */ qemu_gettimeofday(&tv); sn->date_sec = tv.tv_sec; sn->date_nsec = tv.tv_usec * 1000; sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); if (name) { ret = bdrv_snapshot_find(bs, old_sn, name); if (ret >= 0) { pstrcpy(sn->name, sizeof(sn->name), old_sn->name); pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); } else { pstrcpy(sn->name, sizeof(sn->name), name); } } else { /* cast below needed for OpenBSD where tv_sec is still 'long' */ localtime_r((const time_t *)&tv.tv_sec, &tm); strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); } /* save the VM state */ f = qemu_fopen_bdrv(bs, 1); if (!f) { monitor_printf(mon, "Could not open VM state file\n"); goto the_end; } ret = qemu_savevm_state(f, &local_err); vm_state_size = qemu_ftell(f); qemu_fclose(f); if (ret < 0) { error_report_err(local_err); goto the_end; } ret = bdrv_all_create_snapshot(sn, bs, vm_state_size, &bs); if (ret < 0) { monitor_printf(mon, "Error while creating snapshot on '%s'\n", bdrv_get_device_name(bs)); } the_end: aio_context_release(aio_context); if (saved_vm_running) { vm_start(); } }