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[Qemu-devel] [RFC PATCH v2 1/4] block: Fake a bdrv_aio_pwrite
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [RFC PATCH v2 1/4] block: Fake a bdrv_aio_pwrite |
Date: |
Fri, 5 Nov 2010 19:38:24 +0100 |
Don't read this patch, it will be thrown away :-)
---
block.c | 30 ++++++++++++++++++++++++++++++
block.h | 2 ++
2 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/block.c b/block.c
index 985d0b7..f75da13 100644
--- a/block.c
+++ b/block.c
@@ -2053,6 +2053,36 @@ BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs,
int64_t sector_num,
return ret;
}
+struct pread_acb {
+ QEMUBH *bh;
+ BlockDriverCompletionFunc *cb;
+ void *opaque;
+ int ret;
+};
+
+static void bdrv_aio_pwrite_cb(void *opaque)
+{
+ struct pread_acb *x = opaque;
+
+ x->cb(x->opaque, x->ret);
+ qemu_bh_delete(x->bh);
+ free(x);
+}
+
+/* TODO Yes, this is a really bad fake implementation */
+BlockDriverAIOCB *bdrv_aio_pwrite(BlockDriverState *bs, int64_t offset, void*
buf,
+ size_t bytes, BlockDriverCompletionFunc *cb, void *opaque)
+{
+ struct pread_acb *x = qemu_malloc(sizeof(*x));
+ x->bh = qemu_bh_new(bdrv_aio_pwrite_cb, x);
+ x->cb = cb;
+ x->opaque = opaque;
+ x->ret = bdrv_pwrite(bs, offset, buf, bytes);
+ qemu_bh_schedule(x->bh);
+
+ return (BlockDriverAIOCB*) 42;
+}
+
typedef struct MultiwriteCB {
int error;
diff --git a/block.h b/block.h
index a4facf2..5798cdb 100644
--- a/block.h
+++ b/block.h
@@ -116,6 +116,8 @@ BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs,
int64_t sector_num,
BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num,
QEMUIOVector *iov, int nb_sectors,
BlockDriverCompletionFunc *cb, void *opaque);
+BlockDriverAIOCB *bdrv_aio_pwrite(BlockDriverState *bs, int64_t offset, void*
buf,
+ size_t bytes, BlockDriverCompletionFunc *cb, void *opaque);
BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs,
BlockDriverCompletionFunc *cb, void *opaque);
void bdrv_aio_cancel(BlockDriverAIOCB *acb);
--
1.7.2.3
[Qemu-devel] [RFC PATCH v2 3/4] Test cases for block-queue, Kevin Wolf, 2010/11/05
[Qemu-devel] [RFC PATCH v2 4/4] qcow2: Use block-queue, Kevin Wolf, 2010/11/05