2020-09-25 02:54:10 +08:00
|
|
|
/*
|
|
|
|
* Block layer I/O functions
|
|
|
|
*
|
|
|
|
* Copyright (c) 2003 Fabrice Bellard
|
|
|
|
*
|
|
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
|
|
* in the Software without restriction, including without limitation the rights
|
|
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
|
|
* furnished to do so, subject to the following conditions:
|
|
|
|
*
|
|
|
|
* The above copyright notice and this permission notice shall be included in
|
|
|
|
* all copies or substantial portions of the Software.
|
|
|
|
*
|
|
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
|
|
* THE SOFTWARE.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#ifndef BLOCK_COROUTINES_INT_H
|
|
|
|
#define BLOCK_COROUTINES_INT_H
|
|
|
|
|
|
|
|
#include "block/block_int.h"
|
|
|
|
|
|
|
|
int coroutine_fn bdrv_co_check(BlockDriverState *bs,
|
|
|
|
BdrvCheckResult *res, BdrvCheckMode fix);
|
|
|
|
int coroutine_fn bdrv_co_invalidate_cache(BlockDriverState *bs, Error **errp);
|
|
|
|
|
2020-09-25 02:54:12 +08:00
|
|
|
int generated_co_wrapper
|
block: drop bdrv_prwv
Now that we are not maintaining boilerplate code for coroutine
wrappers, there is no more sense in keeping the extra indirection layer
of bdrv_prwv(). Let's drop it and instead generate pure bdrv_preadv()
and bdrv_pwritev().
Currently, bdrv_pwritev() and bdrv_preadv() are returning bytes on
success, auto generated functions will instead return zero, as their
_co_ prototype. Still, it's simple to make the conversion safe: the
only external user of bdrv_pwritev() is test-bdrv-drain, and it is
comfortable enough with bdrv_co_pwritev() instead. So prototypes are
moved to local block/coroutines.h. Next, the only internal use is
bdrv_pread() and bdrv_pwrite(), which are modified to return bytes on
success.
Of course, it would be great to convert bdrv_pread() and bdrv_pwrite()
to return 0 on success. But this requires audit (and probably
conversion) of all their users, let's leave it for another day
refactoring.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20200924185414.28642-7-vsementsov@virtuozzo.com>
2020-09-25 02:54:13 +08:00
|
|
|
bdrv_preadv(BdrvChild *child, int64_t offset, unsigned int bytes,
|
|
|
|
QEMUIOVector *qiov, BdrvRequestFlags flags);
|
|
|
|
int generated_co_wrapper
|
|
|
|
bdrv_pwritev(BdrvChild *child, int64_t offset, unsigned int bytes,
|
|
|
|
QEMUIOVector *qiov, BdrvRequestFlags flags);
|
2020-09-25 02:54:10 +08:00
|
|
|
|
|
|
|
int coroutine_fn
|
|
|
|
bdrv_co_common_block_status_above(BlockDriverState *bs,
|
|
|
|
BlockDriverState *base,
|
2020-09-25 03:40:00 +08:00
|
|
|
bool include_base,
|
2020-09-25 02:54:10 +08:00
|
|
|
bool want_zero,
|
|
|
|
int64_t offset,
|
|
|
|
int64_t bytes,
|
|
|
|
int64_t *pnum,
|
|
|
|
int64_t *map,
|
2020-10-27 13:05:53 +08:00
|
|
|
BlockDriverState **file,
|
|
|
|
int *depth);
|
2020-09-25 02:54:12 +08:00
|
|
|
int generated_co_wrapper
|
2020-09-25 02:54:10 +08:00
|
|
|
bdrv_common_block_status_above(BlockDriverState *bs,
|
|
|
|
BlockDriverState *base,
|
2020-09-25 03:40:00 +08:00
|
|
|
bool include_base,
|
2020-09-25 02:54:10 +08:00
|
|
|
bool want_zero,
|
|
|
|
int64_t offset,
|
|
|
|
int64_t bytes,
|
|
|
|
int64_t *pnum,
|
|
|
|
int64_t *map,
|
2020-10-27 13:05:53 +08:00
|
|
|
BlockDriverState **file,
|
|
|
|
int *depth);
|
2020-09-25 02:54:10 +08:00
|
|
|
|
2020-09-25 02:54:14 +08:00
|
|
|
int coroutine_fn bdrv_co_readv_vmstate(BlockDriverState *bs,
|
|
|
|
QEMUIOVector *qiov, int64_t pos);
|
|
|
|
int coroutine_fn bdrv_co_writev_vmstate(BlockDriverState *bs,
|
|
|
|
QEMUIOVector *qiov, int64_t pos);
|
2020-09-25 02:54:10 +08:00
|
|
|
|
|
|
|
#endif /* BLOCK_COROUTINES_INT_H */
|