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block: Convert bdrv_aio_discard() to byte-based

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Another step towards byte-based interfaces everywhere.  Replace
the sector-based bdrv_aio_discard() with a new byte-based
bdrv_aio_pdiscard(), which silently ignores any unaligned head
or tail.  Driver callbacks will be converted in followup patches.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-id: 1468624988-423-5-git-send-email-eblake@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Eric Blake authored and Stefan Hajnoczi committed 2016-07-20 14:11:55 +01:00
1 parent b15404e027
commit 60ebac16bc
4 files changed
+13 -13
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include/block/block.h
+3 -3
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@@ -316,9 +316,9 @@ BlockAIOCB *bdrv_aio_writev(BdrvChild *child, int64_t sector_num,
BlockCompletionFunc *cb, void *opaque);
BlockAIOCB *bdrv_aio_flush(BlockDriverState *bs,
BlockCompletionFunc *cb, void *opaque);
BlockAIOCB *bdrv_aio_discard(BlockDriverState *bs,
int64_t sector_num, int nb_sectors,
BlockCompletionFunc *cb, void *opaque);
BlockAIOCB *bdrv_aio_pdiscard(BlockDriverState *bs,
int64_t offset, int count,
BlockCompletionFunc *cb, void *opaque);
void bdrv_aio_cancel(BlockAIOCB *acb);
void bdrv_aio_cancel_async(BlockAIOCB *acb);