commit 36e3b2e7338a5a5323f7ca9d8d4d439e971a18dd
author Eric Blake <eblake@redhat.com> Fri Jul 15 17:22:55 2016 -0600
committer Stefan Hajnoczi <stefanha@redhat.com> Wed Jul 20 14:11:55 2016 +0100
tree c7ca5f09f89671d4cb57ab0eb96b7d4f6a998645
parent 1c6c4bb7f0a4cc3987e58880ef96159985dc1228

raw-posix: Switch paio_submit() to byte-based

The only remaining uses of paio_submit() were flush (with no
offset or count) and discard (which we are switching to byte-based);
furthermore, the similarly named paio_submit_co() is already
byte-based.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1468624988-423-7-git-send-email-eblake@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

block/raw-win32.c

diff --git a/block/raw-win32.c b/block/raw-win32.c
index 9b813d9..56f45fe 100644
--- a/block/raw-win32.c
+++ b/block/raw-win32.c
@@ -142,7 +142,7 @@
 }
 
 static BlockAIOCB *paio_submit(BlockDriverState *bs, HANDLE hfile,
-        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
+        int64_t offset, QEMUIOVector *qiov, int count,
         BlockCompletionFunc *cb, void *opaque, int type)
 {
     RawWin32AIOData *acb = g_new(RawWin32AIOData, 1);
@@ -155,11 +155,12 @@
     if (qiov) {
         acb->aio_iov = qiov->iov;
         acb->aio_niov = qiov->niov;
+        assert(qiov->size == count);
     }
-    acb->aio_nbytes = nb_sectors * 512;
-    acb->aio_offset = sector_num * 512;
+    acb->aio_nbytes = count;
+    acb->aio_offset = offset;
 
-    trace_paio_submit(acb, opaque, sector_num, nb_sectors, type);
+    trace_paio_submit(acb, opaque, offset, count, type);
     pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
     return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque);
 }
@@ -378,9 +379,10 @@
     BDRVRawState *s = bs->opaque;
     if (s->aio) {
         return win32_aio_submit(bs, s->aio, s->hfile, sector_num, qiov,
-                                nb_sectors, cb, opaque, QEMU_AIO_READ); 
+                                nb_sectors, cb, opaque, QEMU_AIO_READ);
     } else {
-        return paio_submit(bs, s->hfile, sector_num, qiov, nb_sectors,
+        return paio_submit(bs, s->hfile, sector_num << BDRV_SECTOR_BITS, qiov,
+                           nb_sectors << BDRV_SECTOR_BITS,
                            cb, opaque, QEMU_AIO_READ);
     }
 }
@@ -392,9 +394,10 @@
     BDRVRawState *s = bs->opaque;
     if (s->aio) {
         return win32_aio_submit(bs, s->aio, s->hfile, sector_num, qiov,
-                                nb_sectors, cb, opaque, QEMU_AIO_WRITE); 
+                                nb_sectors, cb, opaque, QEMU_AIO_WRITE);
     } else {
-        return paio_submit(bs, s->hfile, sector_num, qiov, nb_sectors,
+        return paio_submit(bs, s->hfile, sector_num << BDRV_SECTOR_BITS, qiov,
+                           nb_sectors << BDRV_SECTOR_BITS,
                            cb, opaque, QEMU_AIO_WRITE);
     }
 }