commit f141eafe286c785f7e2c1e312a73f90d66bdfb90
author aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> Tue Apr 07 18:43:24 2009 +0000
committer aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> Tue Apr 07 18:43:24 2009 +0000
tree 049474e891e06deec79bd3d58d49b49ba627276a
parent c87c0672936a5b825c0b95bb1d7f5d6dc92294e4

push down vector linearization to posix-aio-compat.c (Christoph Hellwig)

Make all AIO requests vectored and defer linearization until the actual
I/O thread.  This prepares for using native preadv/pwritev.

Also enables asynchronous direct I/O by handling that case in the I/O thread.

Qcow and qcow2 propably want to be adopted to directly deal with multi-segment
requests, but that can be implemented later.


Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7020 c046a42c-6fe2-441c-8c8c-71466251a162

block_int.h

diff --git a/block_int.h b/block_int.h
index dc43359..3e78997 100644
--- a/block_int.h
+++ b/block_int.h
@@ -54,11 +54,11 @@
     int (*bdrv_set_key)(BlockDriverState *bs, const char *key);
     int (*bdrv_make_empty)(BlockDriverState *bs);
     /* aio */
-    BlockDriverAIOCB *(*bdrv_aio_read)(BlockDriverState *bs,
-        int64_t sector_num, uint8_t *buf, int nb_sectors,
+    BlockDriverAIOCB *(*bdrv_aio_readv)(BlockDriverState *bs,
+        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
         BlockDriverCompletionFunc *cb, void *opaque);
-    BlockDriverAIOCB *(*bdrv_aio_write)(BlockDriverState *bs,
-        int64_t sector_num, const uint8_t *buf, int nb_sectors,
+    BlockDriverAIOCB *(*bdrv_aio_writev)(BlockDriverState *bs,
+        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
         BlockDriverCompletionFunc *cb, void *opaque);
     void (*bdrv_aio_cancel)(BlockDriverAIOCB *acb);
     int aiocb_size;