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block: Implement bdrv_{pread,pwrite,pwrite_zeroes}() using generated_co_wrapper

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bdrv_{pread,pwrite}() now return -EIO instead of -EINVAL when 'bytes' is
negative, making them consistent with bdrv_{preadv,pwritev}() and
bdrv_co_{pread,pwrite,preadv,pwritev}().

bdrv_pwrite_zeroes() now also calls trace_bdrv_co_pwrite_zeroes() and
clears the BDRV_REQ_MAY_UNMAP flag when appropriate, which it didn't
previously.

Signed-off-by: Alberto Faria <afaria@redhat.com>
Message-Id: <20220609152744.3891847-8-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>
This commit is contained in:
Alberto Faria 2022-06-09 16:27:41 +01:00 • committed by Hanna Reitz
parent c1458c66b2
commit 1d39c7098b
2 changed files with 9 additions and 47 deletions
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15
include/block/block-io.h
View file

@ -39,13 +39,16 @@
* to catch when they are accidentally called by the wrong API.
*/
int bdrv_pwrite_zeroes(BdrvChild *child, int64_t offset,
int64_t bytes, BdrvRequestFlags flags);
int generated_co_wrapper bdrv_pwrite_zeroes(BdrvChild *child, int64_t offset,
int64_t bytes,
BdrvRequestFlags flags);
int bdrv_make_zero(BdrvChild *child, BdrvRequestFlags flags);
int bdrv_pread(BdrvChild *child, int64_t offset, int64_t bytes, void *buf,
BdrvRequestFlags flags);
int bdrv_pwrite(BdrvChild *child, int64_t offset, int64_t bytes,
const void *buf, BdrvRequestFlags flags);
int generated_co_wrapper bdrv_pread(BdrvChild *child, int64_t offset,
int64_t bytes, void *buf,
BdrvRequestFlags flags);
int generated_co_wrapper bdrv_pwrite(BdrvChild *child, int64_t offset,
int64_t bytes, const void *buf,
BdrvRequestFlags flags);
int bdrv_pwrite_sync(BdrvChild *child, int64_t offset, int64_t bytes,
const void *buf, BdrvRequestFlags flags);
/*