c1458c66b2
For consistency with other I/O functions, and in preparation to
implement bdrv_{pread,pwrite}() using generated_co_wrapper.
unsigned int fits in int64_t, so all callers remain correct.
bdrv_check_request32() is called further down the stack and causes -EIO
to be returned if 'bytes' is negative or greater than
BDRV_REQUEST_MAX_BYTES, which in turns never exceeds SIZE_MAX.
Signed-off-by: Alberto Faria <afaria@redhat.com>
Message-Id: <20220609152744.3891847-7-afaria@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
133 lines
4.8 KiB
C
133 lines
4.8 KiB
C
/*
|
|
* 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_H
|
|
#define BLOCK_COROUTINES_H
|
|
|
|
#include "block/block_int.h"
|
|
|
|
/* For blk_bs() in generated block/block-gen.c */
|
|
#include "sysemu/block-backend.h"
|
|
|
|
/*
|
|
* I/O API functions. These functions are thread-safe.
|
|
*
|
|
* See include/block/block-io.h for more information about
|
|
* the I/O API.
|
|
*/
|
|
|
|
int coroutine_fn bdrv_co_check(BlockDriverState *bs,
|
|
BdrvCheckResult *res, BdrvCheckMode fix);
|
|
int coroutine_fn bdrv_co_invalidate_cache(BlockDriverState *bs, Error **errp);
|
|
|
|
int coroutine_fn
|
|
bdrv_co_common_block_status_above(BlockDriverState *bs,
|
|
BlockDriverState *base,
|
|
bool include_base,
|
|
bool want_zero,
|
|
int64_t offset,
|
|
int64_t bytes,
|
|
int64_t *pnum,
|
|
int64_t *map,
|
|
BlockDriverState **file,
|
|
int *depth);
|
|
|
|
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);
|
|
|
|
int coroutine_fn
|
|
nbd_co_do_establish_connection(BlockDriverState *bs, bool blocking,
|
|
Error **errp);
|
|
|
|
|
|
int coroutine_fn
|
|
blk_co_do_preadv(BlockBackend *blk, int64_t offset, int64_t bytes,
|
|
QEMUIOVector *qiov, BdrvRequestFlags flags);
|
|
|
|
|
|
int coroutine_fn
|
|
blk_co_do_pwritev_part(BlockBackend *blk, int64_t offset, int64_t bytes,
|
|
QEMUIOVector *qiov, size_t qiov_offset,
|
|
BdrvRequestFlags flags);
|
|
|
|
int coroutine_fn
|
|
blk_co_do_ioctl(BlockBackend *blk, unsigned long int req, void *buf);
|
|
|
|
int coroutine_fn
|
|
blk_co_do_pdiscard(BlockBackend *blk, int64_t offset, int64_t bytes);
|
|
|
|
int coroutine_fn blk_co_do_flush(BlockBackend *blk);
|
|
|
|
|
|
/*
|
|
* "I/O or GS" API functions. These functions can run without
|
|
* the BQL, but only in one specific iothread/main loop.
|
|
*
|
|
* See include/block/block-io.h for more information about
|
|
* the "I/O or GS" API.
|
|
*/
|
|
|
|
int generated_co_wrapper
|
|
bdrv_preadv(BdrvChild *child, int64_t offset, int64_t bytes,
|
|
QEMUIOVector *qiov, BdrvRequestFlags flags);
|
|
|
|
int generated_co_wrapper
|
|
bdrv_pwritev(BdrvChild *child, int64_t offset, int64_t bytes,
|
|
QEMUIOVector *qiov, BdrvRequestFlags flags);
|
|
|
|
int generated_co_wrapper
|
|
bdrv_common_block_status_above(BlockDriverState *bs,
|
|
BlockDriverState *base,
|
|
bool include_base,
|
|
bool want_zero,
|
|
int64_t offset,
|
|
int64_t bytes,
|
|
int64_t *pnum,
|
|
int64_t *map,
|
|
BlockDriverState **file,
|
|
int *depth);
|
|
int generated_co_wrapper
|
|
nbd_do_establish_connection(BlockDriverState *bs, bool blocking, Error **errp);
|
|
|
|
int generated_co_wrapper
|
|
blk_do_preadv(BlockBackend *blk, int64_t offset, int64_t bytes,
|
|
QEMUIOVector *qiov, BdrvRequestFlags flags);
|
|
|
|
int generated_co_wrapper
|
|
blk_do_pwritev_part(BlockBackend *blk, int64_t offset, int64_t bytes,
|
|
QEMUIOVector *qiov, size_t qiov_offset,
|
|
BdrvRequestFlags flags);
|
|
|
|
int generated_co_wrapper
|
|
blk_do_ioctl(BlockBackend *blk, unsigned long int req, void *buf);
|
|
|
|
int generated_co_wrapper
|
|
blk_do_pdiscard(BlockBackend *blk, int64_t offset, int64_t bytes);
|
|
|
|
int generated_co_wrapper blk_do_flush(BlockBackend *blk);
|
|
|
|
#endif /* BLOCK_COROUTINES_H */
|