Drop the assumption that we're using the main AioContext for raw-win32.
Convert the aio-win32 code to support detach/attach and replace
qemu_aio_wait() with aio_poll().
The .bdrv_detach/attach_aio_context() interfaces move the aio-win32
event notifier from the old to the new AioContext.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
QEMUWin32AIOState *aio, HANDLE hfile,
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
BlockDriverCompletionFunc *cb, void *opaque, int type);
+void win32_aio_detach_aio_context(QEMUWin32AIOState *aio,
+ AioContext *old_context);
+void win32_aio_attach_aio_context(QEMUWin32AIOState *aio,
+ AioContext *new_context);
#endif
#endif /* QEMU_RAW_AIO_H */
NULL, 0, NULL, 0, &returned, NULL);
}
+static void raw_detach_aio_context(BlockDriverState *bs)
+{
+ BDRVRawState *s = bs->opaque;
+
+ if (s->aio) {
+ win32_aio_detach_aio_context(s->aio, bdrv_get_aio_context(bs));
+ }
+}
+
+static void raw_attach_aio_context(BlockDriverState *bs,
+ AioContext *new_context)
+{
+ BDRVRawState *s = bs->opaque;
+
+ if (s->aio) {
+ win32_aio_attach_aio_context(s->aio, new_context);
+ }
+}
+
static void raw_probe_alignment(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
error_setg_errno(errp, -ret, "Could not enable AIO");
goto fail;
}
+
+ win32_aio_attach_aio_context(s->aio, bdrv_get_aio_context(bs));
}
raw_probe_alignment(bs);
BDRVRawState *s = bs->opaque;
if (s->aio) {
+ win32_aio_detach_aio_context(s->aio, bdrv_get_aio_context(bs));
win32_aio_cleanup(s->aio);
s->aio = NULL;
}
.bdrv_aio_writev = raw_aio_writev,
.bdrv_aio_flush = raw_aio_flush,
+ .bdrv_detach_aio_context = raw_detach_aio_context,
+ .bdrv_attach_aio_context = raw_attach_aio_context,
+
.bdrv_getlength = raw_getlength,
.has_variable_length = true,
HANDLE hIOCP;
EventNotifier e;
int count;
+ bool is_aio_context_attached;
};
typedef struct QEMUWin32AIOCB {
* wait for completion.
*/
while (!HasOverlappedIoCompleted(&waiocb->ov)) {
- qemu_aio_wait();
+ aio_poll(bdrv_get_aio_context(blockacb->bs), true);
}
}
}
}
+void win32_aio_detach_aio_context(QEMUWin32AIOState *aio,
+ AioContext *old_context)
+{
+ aio_set_event_notifier(old_context, &aio->e, NULL);
+ aio->is_aio_context_attached = false;
+}
+
+void win32_aio_attach_aio_context(QEMUWin32AIOState *aio,
+ AioContext *new_context)
+{
+ aio->is_aio_context_attached = true;
+ aio_set_event_notifier(new_context, &aio->e, win32_aio_completion_cb);
+}
+
QEMUWin32AIOState *win32_aio_init(void)
{
QEMUWin32AIOState *s;
goto out_close_efd;
}
- qemu_aio_set_event_notifier(&s->e, win32_aio_completion_cb);
-
return s;
out_close_efd:
void win32_aio_cleanup(QEMUWin32AIOState *aio)
{
- qemu_aio_set_event_notifier(&aio->e, NULL);
+ assert(!aio->is_aio_context_attached);
CloseHandle(aio->hIOCP);
event_notifier_cleanup(&aio->e);
g_free(aio);