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copy-on-read: support preadv/pwritev_part functions 

Add support for the recently introduced functions
bdrv_co_preadv_part()
and
bdrv_co_pwritev_part()
to the COR-filter driver.

Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20201216061703.70908-2-vsementsov@virtuozzo.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
master
Andrey Shinkevich 2020-12-16 09:16:51 +03:00 committed by Max Reitz
parent 0c8de0a133
commit 1252e03b8e
1 changed files with 16 additions and 12 deletions
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28
block/copy-on-read.c
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@ -74,21 +74,25 @@ static int64_t cor_getlength(BlockDriverState *bs)
}
static int coroutine_fn cor_co_preadv(BlockDriverState *bs,
uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, int flags)
static int coroutine_fn cor_co_preadv_part(BlockDriverState *bs,
uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov,
size_t qiov_offset,
int flags)
{
return bdrv_co_preadv(bs->file, offset, bytes, qiov,
flags | BDRV_REQ_COPY_ON_READ);
return bdrv_co_preadv_part(bs->file, offset, bytes, qiov, qiov_offset,
flags | BDRV_REQ_COPY_ON_READ);
}
static int coroutine_fn cor_co_pwritev(BlockDriverState *bs,
uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, int flags)
static int coroutine_fn cor_co_pwritev_part(BlockDriverState *bs,
uint64_t offset,
uint64_t bytes,
QEMUIOVector *qiov,
size_t qiov_offset, int flags)
{
return bdrv_co_pwritev(bs->file, offset, bytes, qiov, flags);
return bdrv_co_pwritev_part(bs->file, offset, bytes, qiov, qiov_offset,
flags);
}
@ -137,8 +141,8 @@ static BlockDriver bdrv_copy_on_read = {
.bdrv_getlength = cor_getlength,
.bdrv_co_preadv = cor_co_preadv,
.bdrv_co_pwritev = cor_co_pwritev,
.bdrv_co_preadv_part = cor_co_preadv_part,
.bdrv_co_pwritev_part = cor_co_pwritev_part,
.bdrv_co_pwrite_zeroes = cor_co_pwrite_zeroes,
.bdrv_co_pdiscard = cor_co_pdiscard,
.bdrv_co_pwritev_compressed = cor_co_pwritev_compressed,