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/*
* block_copy API
*
* Copyright (C) 2013 Proxmox Server Solutions
* Copyright (c) 2019 Virtuozzo International GmbH.
*
* Authors:
* Dietmar Maurer (dietmar@proxmox.com)
* Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef BLOCK_COPY_H
#define BLOCK_COPY_H
#include "block/block.h"
#include "qemu/co-shared-resource.h"
typedef void (*ProgressBytesCallbackFunc)(int64_t bytes, void *opaque);
typedef void (*BlockCopyAsyncCallbackFunc)(void *opaque);
typedef struct BlockCopyState BlockCopyState;
typedef struct BlockCopyCallState BlockCopyCallState;
BlockCopyState *block_copy_state_new(BdrvChild *source, BdrvChild *target,
int64_t cluster_size, bool use_copy_range,
BdrvRequestFlags write_flags,
Error **errp);
void block_copy_set_progress_callback(
BlockCopyState *s,
ProgressBytesCallbackFunc progress_bytes_callback,
void *progress_opaque);
void block_copy_set_progress_meter(BlockCopyState *s, ProgressMeter *pm);
void block_copy_state_free(BlockCopyState *s);
int64_t block_copy_reset_unallocated(BlockCopyState *s,
int64_t offset, int64_t *count);
int coroutine_fn block_copy(BlockCopyState *s, int64_t offset, int64_t bytes,
bool *error_is_read);
/*
* Run block-copy in a coroutine, create corresponding BlockCopyCallState
* object and return pointer to it. Never returns NULL.
*
* Caller is responsible to call block_copy_call_free() to free
* BlockCopyCallState object.
*
* @max_workers means maximum of parallel coroutines to execute sub-requests,
* must be > 0.
*
* @max_chunk means maximum length for one IO operation. Zero means unlimited.
*/
BlockCopyCallState *block_copy_async(BlockCopyState *s,
int64_t offset, int64_t bytes,
int max_workers, int64_t max_chunk,
BlockCopyAsyncCallbackFunc cb,
void *cb_opaque);
/*
* Free finished BlockCopyCallState. Trying to free running
* block-copy will crash.
*/
void block_copy_call_free(BlockCopyCallState *call_state);
/*
* Note, that block-copy call is marked finished prior to calling
* the callback.
*/
bool block_copy_call_finished(BlockCopyCallState *call_state);
bool block_copy_call_succeeded(BlockCopyCallState *call_state);
bool block_copy_call_failed(BlockCopyCallState *call_state);
int block_copy_call_status(BlockCopyCallState *call_state, bool *error_is_read);
BdrvDirtyBitmap *block_copy_dirty_bitmap(BlockCopyState *s);
void block_copy_set_skip_unallocated(BlockCopyState *s, bool skip);
#endif /* BLOCK_COPY_H */
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