2020-09-24 21:54:10 +03:00
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/*
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* Block layer I/O functions
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef BLOCK_COROUTINES_INT_H
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#define BLOCK_COROUTINES_INT_H
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#include "block/block_int.h"
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int coroutine_fn bdrv_co_check(BlockDriverState *bs,
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BdrvCheckResult *res, BdrvCheckMode fix);
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int coroutine_fn bdrv_co_invalidate_cache(BlockDriverState *bs, Error **errp);
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2020-09-24 21:54:12 +03:00
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int generated_co_wrapper
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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>
2020-09-24 21:54:13 +03:00
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bdrv_preadv(BdrvChild *child, int64_t offset, unsigned int bytes,
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QEMUIOVector *qiov, BdrvRequestFlags flags);
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int generated_co_wrapper
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bdrv_pwritev(BdrvChild *child, int64_t offset, unsigned int bytes,
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QEMUIOVector *qiov, BdrvRequestFlags flags);
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2020-09-24 21:54:10 +03:00
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int coroutine_fn
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bdrv_co_common_block_status_above(BlockDriverState *bs,
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BlockDriverState *base,
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2020-09-24 22:40:00 +03:00
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bool include_base,
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2020-09-24 21:54:10 +03:00
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bool want_zero,
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int64_t offset,
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int64_t bytes,
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int64_t *pnum,
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int64_t *map,
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BlockDriverState **file);
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2020-09-24 21:54:12 +03:00
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int generated_co_wrapper
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2020-09-24 21:54:10 +03:00
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bdrv_common_block_status_above(BlockDriverState *bs,
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BlockDriverState *base,
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2020-09-24 22:40:00 +03:00
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bool include_base,
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2020-09-24 21:54:10 +03:00
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bool want_zero,
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int64_t offset,
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int64_t bytes,
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int64_t *pnum,
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int64_t *map,
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BlockDriverState **file);
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2020-09-24 21:54:14 +03:00
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int coroutine_fn bdrv_co_readv_vmstate(BlockDriverState *bs,
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QEMUIOVector *qiov, int64_t pos);
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int coroutine_fn bdrv_co_writev_vmstate(BlockDriverState *bs,
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QEMUIOVector *qiov, int64_t pos);
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2020-09-24 21:54:10 +03:00
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#endif /* BLOCK_COROUTINES_INT_H */
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