backup.h

   1 /*
   2  * QEMU backup related definitions
   3  *
   4  * Copyright (C) 2013 Proxmox Server Solutions
   5  *
   6  * Authors:
   7  *  Dietmar Maurer (dietmar@proxmox.com)
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  *
  12  */
  13
  14 #ifndef QEMU_BACKUP_H
  15 #define QEMU_BACKUP_H
  16
  17 #include <uuid/uuid.h>
  18 #include "block/block.h"
  19
  20 #define BACKUP_CLUSTER_BITS 16
  21 #define BACKUP_CLUSTER_SIZE (1<<BACKUP_CLUSTER_BITS)
  22 #define BACKUP_BLOCKS_PER_CLUSTER (BACKUP_CLUSTER_SIZE/BDRV_SECTOR_SIZE)
  23
  24 typedef int BackupDumpFunc(void *opaque, BlockDriverState *bs,
  25                            int64_t cluster_num, unsigned char *buf);
  26
  27 void backup_job_start(BlockDriverState *bs, bool cancel);
  28
  29 int backup_job_create(BlockDriverState *bs, BackupDumpFunc *backup_dump_cb,
  30                       BlockDriverCompletionFunc *backup_complete_cb,
  31                       void *opaque, int64_t speed);
  32
  33 typedef struct BackupDriver {
  34     const char *format;
  35     void *(*open)(const char *filename, uuid_t uuid, Error **errp);
  36     int (*close)(void *opaque, Error **errp);
  37     int (*register_config)(void *opaque, const char *name, gpointer data,
  38                               size_t data_len);
  39     int (*register_stream)(void *opaque, const char *devname, size_t size);
  40     int (*dump)(void *opaque, uint8_t dev_id, int64_t cluster_num,
  41                    unsigned char *buf, size_t *zero_bytes);
  42     int (*complete)(void *opaque, uint8_t dev_id, int ret);
  43 } BackupDriver;
  44
  45 #endif /* QEMU_BACKUP_H */