Commit ac8c19ba authored by Pavel Dovgalyuk's avatar Pavel Dovgalyuk Committed by Paolo Bonzini
Browse files

savevm: add public save_vmstate function 



This patch introduces save_vmstate function to allow saving and loading
vmstates from the replay module.

Signed-off-by: default avatarPavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-Id: <20170124071741.4572.13714.stgit@PASHA-ISP>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 1dfb1b2d

include/sysemu/sysemu.h

+1 −0
Original line number Diff line number Diff line
@@ -74,6 +74,7 @@ void qemu_add_machine_init_done_notifier(Notifier *notify); 
void qemu_remove_machine_init_done_notifier(Notifier *notify);



void hmp_savevm(Monitor *mon, const QDict *qdict);

int save_vmstate(Monitor *mon, const char *name);

int load_vmstate(const char *name);

void hmp_delvm(Monitor *mon, const QDict *qdict);

void hmp_info_snapshots(Monitor *mon, const QDict *qdict);

migration/savevm.c

+22 −11
Original line number Diff line number Diff line
@@ -2042,38 +2042,40 @@ int qemu_loadvm_state(QEMUFile *f) 
    return ret;

}



void hmp_savevm(Monitor *mon, const QDict *qdict)

int save_vmstate(Monitor *mon, const char *name)

{

    BlockDriverState *bs, *bs1;

    QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;

    int ret;

    int ret = -1;

    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;

        return ret;

    }



    /* Delete old snapshots of the same name */

    if (name && bdrv_all_delete_snapshot(name, &bs1, &local_err) < 0) {

    if (name) {

        ret = bdrv_all_delete_snapshot(name, &bs1, &local_err);

        if (ret < 0) {

            error_reportf_err(local_err,

                              "Error while deleting snapshot on device '%s': ",

                              bdrv_get_device_name(bs1));

        return;

            return ret;

        }

    }



    bs = bdrv_all_find_vmstate_bs();

    if (bs == NULL) {

        monitor_printf(mon, "No block device can accept snapshots\n");

        return;

        return ret;

    }

    aio_context = bdrv_get_aio_context(bs);
@@ -2082,7 +2084,7 @@ void hmp_savevm(Monitor *mon, const QDict *qdict) 
    ret = global_state_store();

    if (ret) {

        monitor_printf(mon, "Error saving global state\n");

        return;

        return ret;

    }

    vm_stop(RUN_STATE_SAVE_VM);
@@ -2128,13 +2130,22 @@ void hmp_savevm(Monitor *mon, const QDict *qdict) 
    if (ret < 0) {

        monitor_printf(mon, "Error while creating snapshot on '%s'\n",

                       bdrv_get_device_name(bs));

        goto the_end;

    }



    ret = 0;



 the_end:

    aio_context_release(aio_context);

    if (saved_vm_running) {

        vm_start();

    }

    return ret;

}



void hmp_savevm(Monitor *mon, const QDict *qdict)

{

    save_vmstate(mon, qdict_get_try_str(qdict, "name"));

}



void qmp_xen_save_devices_state(const char *filename, Error **errp)