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We use a generic BackupDriver struct to encapsulate all archive format related function. Another option would be to simply dump <devid,cluster_num,cluster_data> to the output fh (pipe), and an external binary saves the data. That way we could move the whole archive format related code out of qemu.
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/*
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* QEMU backup related definitions
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*
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* Copyright (C) 2013 Proxmox Server Solutions
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*
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* Authors:
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* Dietmar Maurer (dietmar@proxmox.com)
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef QEMU_BACKUP_H
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#define QEMU_BACKUP_H
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#include <uuid/uuid.h>
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#include "block/block.h"
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#define BACKUP_CLUSTER_BITS 16
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#define BACKUP_CLUSTER_SIZE (1<<BACKUP_CLUSTER_BITS)
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#define BACKUP_BLOCKS_PER_CLUSTER (BACKUP_CLUSTER_SIZE/BDRV_SECTOR_SIZE)
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typedef int BackupDumpFunc(void *opaque, BlockDriverState *bs,
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int64_t cluster_num, unsigned char *buf);
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void backup_job_start(BlockDriverState *bs, bool cancel);
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int backup_job_create(BlockDriverState *bs, BackupDumpFunc *backup_dump_cb,
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BlockDriverCompletionFunc *backup_complete_cb,
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void *opaque, int64_t speed);
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typedef struct BackupDriver {
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const char *format;
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void *(*open)(const char *filename, uuid_t uuid, Error **errp);
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int (*close)(void *opaque, Error **errp);
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int (*register_config)(void *opaque, const char *name, gpointer data,
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size_t data_len);
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int (*register_stream)(void *opaque, const char *devname, size_t size);
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int (*dump)(void *opaque, uint8_t dev_id, int64_t cluster_num,
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unsigned char *buf, size_t *zero_bytes);
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int (*complete)(void *opaque, uint8_t dev_id, int ret);
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} BackupDriver;
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#endif /* QEMU_BACKUP_H */
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