15df6e6987
Add possibility to limit block_copy() call in time. To be used in the next commit. As timed-out block_copy() call will continue in background anyway (we can't immediately cancel IO operation), it's important also give user a possibility to pass a callback, to do some additional actions on block-copy call finish. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@openvz.org> Reviewed-by: Hanna Reitz <hreitz@redhat.com> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
101 lines
3.7 KiB
C
101 lines
3.7 KiB
C
/*
|
|
* 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"
|
|
|
|
/* All APIs are thread-safe */
|
|
|
|
typedef void (*BlockCopyAsyncCallbackFunc)(void *opaque);
|
|
typedef struct BlockCopyState BlockCopyState;
|
|
typedef struct BlockCopyCallState BlockCopyCallState;
|
|
|
|
BlockCopyState *block_copy_state_new(BdrvChild *source, BdrvChild *target,
|
|
const BdrvDirtyBitmap *bitmap,
|
|
Error **errp);
|
|
|
|
/* Function should be called prior any actual copy request */
|
|
void block_copy_set_copy_opts(BlockCopyState *s, bool use_copy_range,
|
|
bool compress);
|
|
void block_copy_set_progress_meter(BlockCopyState *s, ProgressMeter *pm);
|
|
|
|
void block_copy_state_free(BlockCopyState *s);
|
|
|
|
void block_copy_reset(BlockCopyState *s, int64_t offset, int64_t bytes);
|
|
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 ignore_ratelimit, uint64_t timeout_ns,
|
|
BlockCopyAsyncCallbackFunc cb,
|
|
void *cb_opaque);
|
|
|
|
/*
|
|
* 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);
|
|
bool block_copy_call_cancelled(BlockCopyCallState *call_state);
|
|
int block_copy_call_status(BlockCopyCallState *call_state, bool *error_is_read);
|
|
|
|
void block_copy_set_speed(BlockCopyState *s, uint64_t speed);
|
|
void block_copy_kick(BlockCopyCallState *call_state);
|
|
|
|
/*
|
|
* Cancel running block-copy call.
|
|
*
|
|
* Cancel leaves block-copy state valid: dirty bits are correct and you may use
|
|
* cancel + <run block_copy with same parameters> to emulate pause/resume.
|
|
*
|
|
* Note also, that the cancel is async: it only marks block-copy call to be
|
|
* cancelled. So, the call may be cancelled (block_copy_call_cancelled() reports
|
|
* true) but not yet finished (block_copy_call_finished() reports false).
|
|
*/
|
|
void block_copy_call_cancel(BlockCopyCallState *call_state);
|
|
|
|
BdrvDirtyBitmap *block_copy_dirty_bitmap(BlockCopyState *s);
|
|
int64_t block_copy_cluster_size(BlockCopyState *s);
|
|
void block_copy_set_skip_unallocated(BlockCopyState *s, bool skip);
|
|
|
|
#endif /* BLOCK_COPY_H */
|