a92b1b065e
When checking for allocation across a chain, it's already easy to count the depth within the chain at which the allocation is found. Instead of throwing that information away, return it to the caller. Existing callers only cared about allocated/non-allocated, but having a depth available will be used by NBD in the next patch. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20201027050556.269064-9-eblake@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> [eblake: rebase to master] Signed-off-by: Eric Blake <eblake@redhat.com>
70 lines
3 KiB
C
70 lines
3 KiB
C
/*
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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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int generated_co_wrapper
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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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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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bool include_base,
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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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int *depth);
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int generated_co_wrapper
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bdrv_common_block_status_above(BlockDriverState *bs,
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BlockDriverState *base,
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bool include_base,
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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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int *depth);
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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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#endif /* BLOCK_COROUTINES_INT_H */
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