block: Convert .bdrv_aio_discard() to byte-based

Another step towards byte-based interfaces everywhere.  Replace
the sector-based driver callback .bdrv_aio_discard() with a new
byte-based .bdrv_aio_pdiscard().  Only raw-posix and RBD drivers
are affected, so it was not worth splitting into multiple patches.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1468624988-423-9-git-send-email-eblake@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 3 insertions, 4 deletions

diff --git a/block/io.c b/block/io.c
index 58fdac5..5c759fa 100644
--- a/block/io.c
+++ b/block/io.c
@@ -2423,7 +2423,7 @@ int coroutine_fn bdrv_co_pdiscard(BlockDriverState *bs, int64_t offset,
         return 0;
     }
 
-    if (!bs->drv->bdrv_co_discard && !bs->drv->bdrv_aio_discard) {
+    if (!bs->drv->bdrv_co_discard && !bs->drv->bdrv_aio_pdiscard) {
         return 0;
     }
 
@@ -2464,9 +2464,8 @@ int coroutine_fn bdrv_co_pdiscard(BlockDriverState *bs, int64_t offset,
                 .coroutine = qemu_coroutine_self(),
             };
 
-            acb = bs->drv->bdrv_aio_discard(bs, offset >> BDRV_SECTOR_BITS,
-                                            num >> BDRV_SECTOR_BITS,
-                                            bdrv_co_io_em_complete, &co);
+            acb = bs->drv->bdrv_aio_pdiscard(bs, offset, num,
+                                             bdrv_co_io_em_complete, &co);
             if (acb == NULL) {
                 ret = -EIO;
                 goto out;