include/block/block_backup.h

   1 /*
   2  * QEMU backup
   3  *
   4  * Copyright (c) 2013 Proxmox Server Solutions
   5  * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
   6  * Copyright (c) 2016 Intel Corporation
   7  * Copyright (c) 2016 FUJITSU LIMITED
   8  *
   9  * Authors:
  10  *  Dietmar Maurer <dietmar@proxmox.com>
  11  *  Changlong Xie <xiecl.fnst@cn.fujitsu.com>
  12  *
  13  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  14  * See the COPYING file in the top-level directory.
  15  *
  16  */
  17
  18 #ifndef BLOCK_BACKUP_H
  19 #define BLOCK_BACKUP_H
  20
  21 #include "block/block_int.h"
  22
  23 typedef struct CowRequest {
  24     int64_t start_byte;
  25     int64_t end_byte;
  26     QLIST_ENTRY(CowRequest) list;
  27     CoQueue wait_queue; /* coroutines blocked on this request */
  28 } CowRequest;
  29
  30 void backup_wait_for_overlapping_requests(BlockJob *job, int64_t offset,
  31                                           uint64_t bytes);
  32 void backup_cow_request_begin(CowRequest *req, BlockJob *job,
  33                               int64_t offset, uint64_t bytes);
  34 void backup_cow_request_end(CowRequest *req);
  35
  36 void backup_do_checkpoint(BlockJob *job, Error **errp);
  37
  38 #endif