LXR qemu/replication.c

   1/*
   2 * Replication filter
   3 *
   4 * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
   5 * Copyright (c) 2016 Intel Corporation
   6 * Copyright (c) 2016 FUJITSU LIMITED
   7 *
   8 * Author:
   9 *   Changlong Xie <xiecl.fnst@cn.fujitsu.com>
  10 *
  11 * This work is licensed under the terms of the GNU GPL, version 2 or later.
  12 * See the COPYING file in the top-level directory.
  13 */
  14
  15#include "qemu/osdep.h"
  16#include "qapi/error.h"
  17#include "block/replication.h"
  18
  19static QLIST_HEAD(, ReplicationState) replication_states;
  20
  21ReplicationState *replication_new(void *opaque, ReplicationOps *ops)
  22{
  23    ReplicationState *rs;
  24
  25    assert(ops != NULL);
  26    rs = g_new0(ReplicationState, 1);
  27    rs->opaque = opaque;
  28    rs->ops = ops;
  29    QLIST_INSERT_HEAD(&replication_states, rs, node);
  30
  31    return rs;
  32}
  33
  34void replication_remove(ReplicationState *rs)
  35{
  36    if (rs) {
  37        QLIST_REMOVE(rs, node);
  38        g_free(rs);
  39    }
  40}
  41
  42/*
  43 * The caller of the function MUST make sure vm stopped
  44 */
  45void replication_start_all(ReplicationMode mode, Error **errp)
  46{
  47    ReplicationState *rs, *next;
  48    Error *local_err = NULL;
  49
  50    QLIST_FOREACH_SAFE(rs, &replication_states, node, next) {
  51        if (rs->ops && rs->ops->start) {
  52            rs->ops->start(rs, mode, &local_err);
  53        }
  54        if (local_err) {
  55            error_propagate(errp, local_err);
  56            return;
  57        }
  58    }
  59}
  60
  61void replication_do_checkpoint_all(Error **errp)
  62{
  63    ReplicationState *rs, *next;
  64    Error *local_err = NULL;
  65
  66    QLIST_FOREACH_SAFE(rs, &replication_states, node, next) {
  67        if (rs->ops && rs->ops->checkpoint) {
  68            rs->ops->checkpoint(rs, &local_err);
  69        }
  70        if (local_err) {
  71            error_propagate(errp, local_err);
  72            return;
  73        }
  74    }
  75}
  76
  77void replication_get_error_all(Error **errp)
  78{
  79    ReplicationState *rs, *next;
  80    Error *local_err = NULL;
  81
  82    QLIST_FOREACH_SAFE(rs, &replication_states, node, next) {
  83        if (rs->ops && rs->ops->get_error) {
  84            rs->ops->get_error(rs, &local_err);
  85        }
  86        if (local_err) {
  87            error_propagate(errp, local_err);
  88            return;
  89        }
  90    }
  91}
  92
  93void replication_stop_all(bool failover, Error **errp)
  94{
  95    ReplicationState *rs, *next;
  96    Error *local_err = NULL;
  97
  98    QLIST_FOREACH_SAFE(rs, &replication_states, node, next) {
  99        if (rs->ops && rs->ops->stop) {
 100            rs->ops->stop(rs, failover, &local_err);
 101        }
 102        if (local_err) {
 103            error_propagate(errp, local_err);
 104            return;
 105        }
 106    }
 107}
 108